fs/ksmbd/smb2pdu.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *   Copyright (C) 2016 Namjae Jeon <linkinjeon@kernel.org>
   4  *   Copyright (C) 2018 Samsung Electronics Co., Ltd.
   5  */
   6
   7 #include <linux/inetdevice.h>
   8 #include <net/addrconf.h>
   9 #include <linux/syscalls.h>
  10 #include <linux/namei.h>
  11 #include <linux/statfs.h>
  12 #include <linux/ethtool.h>
  13 #include <linux/falloc.h>
  14 #include <linux/mount.h>
  15
  16 #include "glob.h"
  17 #include "smbfsctl.h"
  18 #include "oplock.h"
  19 #include "smbacl.h"
  20
  21 #include "auth.h"
  22 #include "asn1.h"
  23 #include "connection.h"
  24 #include "transport_ipc.h"
  25 #include "transport_rdma.h"
  26 #include "vfs.h"
  27 #include "vfs_cache.h"
  28 #include "misc.h"
  29
  30 #include "server.h"
  31 #include "smb_common.h"
  32 #include "smbstatus.h"
  33 #include "ksmbd_work.h"
  34 #include "mgmt/user_config.h"
  35 #include "mgmt/share_config.h"
  36 #include "mgmt/tree_connect.h"
  37 #include "mgmt/user_session.h"
  38 #include "mgmt/ksmbd_ida.h"
  39 #include "ndr.h"
  40
  41 static void __wbuf(struct ksmbd_work *work, void **req, void **rsp)
  42 {
  43         if (work->next_smb2_rcv_hdr_off) {
  44                 *req = ksmbd_req_buf_next(work);
  45                 *rsp = ksmbd_resp_buf_next(work);
  46         } else {
  47                 *req = smb2_get_msg(work->request_buf);
  48                 *rsp = smb2_get_msg(work->response_buf);
  49         }
  50 }
  51
  52 #define WORK_BUFFERS(w, rq, rs) __wbuf((w), (void **)&(rq), (void **)&(rs))
  53
  54 /**
  55  * check_session_id() - check for valid session id in smb header
  56  * @conn:       connection instance
  57  * @id:         session id from smb header
  58  *
  59  * Return:      1 if valid session id, otherwise 0
  60  */
  61 static inline bool check_session_id(struct ksmbd_conn *conn, u64 id)
  62 {
  63         struct ksmbd_session *sess;
  64
  65         if (id == 0 || id == -1)
  66                 return false;
  67
  68         sess = ksmbd_session_lookup_all(conn, id);
  69         if (sess)
  70                 return true;
  71         pr_err("Invalid user session id: %llu\n", id);
  72         return false;
  73 }
  74
  75 struct channel *lookup_chann_list(struct ksmbd_session *sess, struct ksmbd_conn *conn)
  76 {
  77         struct channel *chann;
  78
  79         list_for_each_entry(chann, &sess->ksmbd_chann_list, chann_list) {
  80                 if (chann->conn == conn)
  81                         return chann;
  82         }
  83
  84         return NULL;
  85 }
  86
  87 /**
  88  * smb2_get_ksmbd_tcon() - get tree connection information using a tree id.
  89  * @work:       smb work
  90  *
  91  * Return:      0 if there is a tree connection matched or these are
  92  *              skipable commands, otherwise error
  93  */
  94 int smb2_get_ksmbd_tcon(struct ksmbd_work *work)
  95 {
  96         struct smb2_hdr *req_hdr = smb2_get_msg(work->request_buf);
  97         unsigned int cmd = le16_to_cpu(req_hdr->Command);
  98         int tree_id;
  99
 100         work->tcon = NULL;
 101         if (cmd == SMB2_TREE_CONNECT_HE ||
 102             cmd ==  SMB2_CANCEL_HE ||
 103             cmd ==  SMB2_LOGOFF_HE) {
 104                 ksmbd_debug(SMB, "skip to check tree connect request\n");
 105                 return 0;
 106         }
 107
 108         if (xa_empty(&work->sess->tree_conns)) {
 109                 ksmbd_debug(SMB, "NO tree connected\n");
 110                 return -ENOENT;
 111         }
 112
 113         tree_id = le32_to_cpu(req_hdr->Id.SyncId.TreeId);
 114         work->tcon = ksmbd_tree_conn_lookup(work->sess, tree_id);
 115         if (!work->tcon) {
 116                 pr_err("Invalid tid %d\n", tree_id);
 117                 return -EINVAL;
 118         }
 119
 120         return 1;
 121 }
 122
 123 /**
 124  * smb2_set_err_rsp() - set error response code on smb response
 125  * @work:       smb work containing response buffer
 126  */
 127 void smb2_set_err_rsp(struct ksmbd_work *work)
 128 {
 129         struct smb2_err_rsp *err_rsp;
 130
 131         if (work->next_smb2_rcv_hdr_off)
 132                 err_rsp = ksmbd_resp_buf_next(work);
 133         else
 134                 err_rsp = smb2_get_msg(work->response_buf);
 135
 136         if (err_rsp->hdr.Status != STATUS_STOPPED_ON_SYMLINK) {
 137                 err_rsp->StructureSize = SMB2_ERROR_STRUCTURE_SIZE2_LE;
 138                 err_rsp->ErrorContextCount = 0;
 139                 err_rsp->Reserved = 0;
 140                 err_rsp->ByteCount = 0;
 141                 err_rsp->ErrorData[0] = 0;
 142                 inc_rfc1001_len(work->response_buf, SMB2_ERROR_STRUCTURE_SIZE2);
 143         }
 144 }
 145
 146 /**
 147  * is_smb2_neg_cmd() - is it smb2 negotiation command
 148  * @work:       smb work containing smb header
 149  *
 150  * Return:      true if smb2 negotiation command, otherwise false
 151  */
 152 bool is_smb2_neg_cmd(struct ksmbd_work *work)
 153 {
 154         struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
 155
 156         /* is it SMB2 header ? */
 157         if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
 158                 return false;
 159
 160         /* make sure it is request not response message */
 161         if (hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR)
 162                 return false;
 163
 164         if (hdr->Command != SMB2_NEGOTIATE)
 165                 return false;
 166
 167         return true;
 168 }
 169
 170 /**
 171  * is_smb2_rsp() - is it smb2 response
 172  * @work:       smb work containing smb response buffer
 173  *
 174  * Return:      true if smb2 response, otherwise false
 175  */
 176 bool is_smb2_rsp(struct ksmbd_work *work)
 177 {
 178         struct smb2_hdr *hdr = smb2_get_msg(work->response_buf);
 179
 180         /* is it SMB2 header ? */
 181         if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
 182                 return false;
 183
 184         /* make sure it is response not request message */
 185         if (!(hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR))
 186                 return false;
 187
 188         return true;
 189 }
 190
 191 /**
 192  * get_smb2_cmd_val() - get smb command code from smb header
 193  * @work:       smb work containing smb request buffer
 194  *
 195  * Return:      smb2 request command value
 196  */
 197 u16 get_smb2_cmd_val(struct ksmbd_work *work)
 198 {
 199         struct smb2_hdr *rcv_hdr;
 200
 201         if (work->next_smb2_rcv_hdr_off)
 202                 rcv_hdr = ksmbd_req_buf_next(work);
 203         else
 204                 rcv_hdr = smb2_get_msg(work->request_buf);
 205         return le16_to_cpu(rcv_hdr->Command);
 206 }
 207
 208 /**
 209  * set_smb2_rsp_status() - set error response code on smb2 header
 210  * @work:       smb work containing response buffer
 211  * @err:        error response code
 212  */
 213 void set_smb2_rsp_status(struct ksmbd_work *work, __le32 err)
 214 {
 215         struct smb2_hdr *rsp_hdr;
 216
 217         if (work->next_smb2_rcv_hdr_off)
 218                 rsp_hdr = ksmbd_resp_buf_next(work);
 219         else
 220                 rsp_hdr = smb2_get_msg(work->response_buf);
 221         rsp_hdr->Status = err;
 222         smb2_set_err_rsp(work);
 223 }
 224
 225 /**
 226  * init_smb2_neg_rsp() - initialize smb2 response for negotiate command
 227  * @work:       smb work containing smb request buffer
 228  *
 229  * smb2 negotiate response is sent in reply of smb1 negotiate command for
 230  * dialect auto-negotiation.
 231  */
 232 int init_smb2_neg_rsp(struct ksmbd_work *work)
 233 {
 234         struct smb2_hdr *rsp_hdr;
 235         struct smb2_negotiate_rsp *rsp;
 236         struct ksmbd_conn *conn = work->conn;
 237
 238         if (conn->need_neg == false)
 239                 return -EINVAL;
 240
 241         *(__be32 *)work->response_buf =
 242                 cpu_to_be32(conn->vals->header_size);
 243
 244         rsp_hdr = smb2_get_msg(work->response_buf);
 245         memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
 246         rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER;
 247         rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
 248         rsp_hdr->CreditRequest = cpu_to_le16(2);
 249         rsp_hdr->Command = SMB2_NEGOTIATE;
 250         rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR);
 251         rsp_hdr->NextCommand = 0;
 252         rsp_hdr->MessageId = 0;
 253         rsp_hdr->Id.SyncId.ProcessId = 0;
 254         rsp_hdr->Id.SyncId.TreeId = 0;
 255         rsp_hdr->SessionId = 0;
 256         memset(rsp_hdr->Signature, 0, 16);
 257
 258         rsp = smb2_get_msg(work->response_buf);
 259
 260         WARN_ON(ksmbd_conn_good(work));
 261
 262         rsp->StructureSize = cpu_to_le16(65);
 263         ksmbd_debug(SMB, "conn->dialect 0x%x\n", conn->dialect);
 264         rsp->DialectRevision = cpu_to_le16(conn->dialect);
 265         /* Not setting conn guid rsp->ServerGUID, as it
 266          * not used by client for identifying connection
 267          */
 268         rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
 269         /* Default Max Message Size till SMB2.0, 64K*/
 270         rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size);
 271         rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size);
 272         rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size);
 273
 274         rsp->SystemTime = cpu_to_le64(ksmbd_systime());
 275         rsp->ServerStartTime = 0;
 276
 277         rsp->SecurityBufferOffset = cpu_to_le16(128);
 278         rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH);
 279         ksmbd_copy_gss_neg_header((char *)(&rsp->hdr) +
 280                 le16_to_cpu(rsp->SecurityBufferOffset));
 281         inc_rfc1001_len(work->response_buf,
 282                         sizeof(struct smb2_negotiate_rsp) -
 283                         sizeof(struct smb2_hdr) - sizeof(rsp->Buffer) +
 284                         AUTH_GSS_LENGTH);
 285         rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE;
 286         if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY)
 287                 rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE;
 288         conn->use_spnego = true;
 289
 290         ksmbd_conn_set_need_negotiate(work);
 291         return 0;
 292 }
 293
 294 /**
 295  * smb2_set_rsp_credits() - set number of credits in response buffer
 296  * @work:       smb work containing smb response buffer
 297  */
 298 int smb2_set_rsp_credits(struct ksmbd_work *work)
 299 {
 300         struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work);
 301         struct smb2_hdr *hdr = ksmbd_resp_buf_next(work);
 302         struct ksmbd_conn *conn = work->conn;
 303         unsigned short credits_requested, aux_max;
 304         unsigned short credit_charge, credits_granted = 0;
 305
 306         if (work->send_no_response)
 307                 return 0;
 308
 309         hdr->CreditCharge = req_hdr->CreditCharge;
 310
 311         if (conn->total_credits > conn->vals->max_credits) {
 312                 hdr->CreditRequest = 0;
 313                 pr_err("Total credits overflow: %d\n", conn->total_credits);
 314                 return -EINVAL;
 315         }
 316
 317         credit_charge = max_t(unsigned short,
 318                               le16_to_cpu(req_hdr->CreditCharge), 1);
 319         if (credit_charge > conn->total_credits) {
 320                 ksmbd_debug(SMB, "Insufficient credits granted, given: %u, granted: %u\n",
 321                             credit_charge, conn->total_credits);
 322                 return -EINVAL;
 323         }
 324
 325         conn->total_credits -= credit_charge;
 326         conn->outstanding_credits -= credit_charge;
 327         credits_requested = max_t(unsigned short,
 328                                   le16_to_cpu(req_hdr->CreditRequest), 1);
 329
 330         /* according to smb2.credits smbtorture, Windows server
 331          * 2016 or later grant up to 8192 credits at once.
 332          *
 333          * TODO: Need to adjuct CreditRequest value according to
 334          * current cpu load
 335          */
 336         if (hdr->Command == SMB2_NEGOTIATE)
 337                 aux_max = 1;
 338         else
 339                 aux_max = conn->vals->max_credits - credit_charge;
 340         credits_granted = min_t(unsigned short, credits_requested, aux_max);
 341
 342         if (conn->vals->max_credits - conn->total_credits < credits_granted)
 343                 credits_granted = conn->vals->max_credits -
 344                         conn->total_credits;
 345
 346         conn->total_credits += credits_granted;
 347         work->credits_granted += credits_granted;
 348
 349         if (!req_hdr->NextCommand) {
 350                 /* Update CreditRequest in last request */
 351                 hdr->CreditRequest = cpu_to_le16(work->credits_granted);
 352         }
 353         ksmbd_debug(SMB,
 354                     "credits: requested[%d] granted[%d] total_granted[%d]\n",
 355                     credits_requested, credits_granted,
 356                     conn->total_credits);
 357         return 0;
 358 }
 359
 360 /**
 361  * init_chained_smb2_rsp() - initialize smb2 chained response
 362  * @work:       smb work containing smb response buffer
 363  */
 364 static void init_chained_smb2_rsp(struct ksmbd_work *work)
 365 {
 366         struct smb2_hdr *req = ksmbd_req_buf_next(work);
 367         struct smb2_hdr *rsp = ksmbd_resp_buf_next(work);
 368         struct smb2_hdr *rsp_hdr;
 369         struct smb2_hdr *rcv_hdr;
 370         int next_hdr_offset = 0;
 371         int len, new_len;
 372
 373         /* Len of this response = updated RFC len - offset of previous cmd
 374          * in the compound rsp
 375          */
 376
 377         /* Storing the current local FID which may be needed by subsequent
 378          * command in the compound request
 379          */
 380         if (req->Command == SMB2_CREATE && rsp->Status == STATUS_SUCCESS) {
 381                 work->compound_fid = ((struct smb2_create_rsp *)rsp)->VolatileFileId;
 382                 work->compound_pfid = ((struct smb2_create_rsp *)rsp)->PersistentFileId;
 383                 work->compound_sid = le64_to_cpu(rsp->SessionId);
 384         }
 385
 386         len = get_rfc1002_len(work->response_buf) - work->next_smb2_rsp_hdr_off;
 387         next_hdr_offset = le32_to_cpu(req->NextCommand);
 388
 389         new_len = ALIGN(len, 8);
 390         inc_rfc1001_len(work->response_buf,
 391                         sizeof(struct smb2_hdr) + new_len - len);
 392         rsp->NextCommand = cpu_to_le32(new_len);
 393
 394         work->next_smb2_rcv_hdr_off += next_hdr_offset;
 395         work->next_smb2_rsp_hdr_off += new_len;
 396         ksmbd_debug(SMB,
 397                     "Compound req new_len = %d rcv off = %d rsp off = %d\n",
 398                     new_len, work->next_smb2_rcv_hdr_off,
 399                     work->next_smb2_rsp_hdr_off);
 400
 401         rsp_hdr = ksmbd_resp_buf_next(work);
 402         rcv_hdr = ksmbd_req_buf_next(work);
 403
 404         if (!(rcv_hdr->Flags & SMB2_FLAGS_RELATED_OPERATIONS)) {
 405                 ksmbd_debug(SMB, "related flag should be set\n");
 406                 work->compound_fid = KSMBD_NO_FID;
 407                 work->compound_pfid = KSMBD_NO_FID;
 408         }
 409         memset((char *)rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
 410         rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER;
 411         rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
 412         rsp_hdr->Command = rcv_hdr->Command;
 413
 414         /*
 415          * Message is response. We don't grant oplock yet.
 416          */
 417         rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR |
 418                                 SMB2_FLAGS_RELATED_OPERATIONS);
 419         rsp_hdr->NextCommand = 0;
 420         rsp_hdr->MessageId = rcv_hdr->MessageId;
 421         rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId;
 422         rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId;
 423         rsp_hdr->SessionId = rcv_hdr->SessionId;
 424         memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16);
 425 }
 426
 427 /**
 428  * is_chained_smb2_message() - check for chained command
 429  * @work:       smb work containing smb request buffer
 430  *
 431  * Return:      true if chained request, otherwise false
 432  */
 433 bool is_chained_smb2_message(struct ksmbd_work *work)
 434 {
 435         struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
 436         unsigned int len, next_cmd;
 437
 438         if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
 439                 return false;
 440
 441         hdr = ksmbd_req_buf_next(work);
 442         next_cmd = le32_to_cpu(hdr->NextCommand);
 443         if (next_cmd > 0) {
 444                 if ((u64)work->next_smb2_rcv_hdr_off + next_cmd +
 445                         __SMB2_HEADER_STRUCTURE_SIZE >
 446                     get_rfc1002_len(work->request_buf)) {
 447                         pr_err("next command(%u) offset exceeds smb msg size\n",
 448                                next_cmd);
 449                         return false;
 450                 }
 451
 452                 if ((u64)get_rfc1002_len(work->response_buf) + MAX_CIFS_SMALL_BUFFER_SIZE >
 453                     work->response_sz) {
 454                         pr_err("next response offset exceeds response buffer size\n");
 455                         return false;
 456                 }
 457
 458                 ksmbd_debug(SMB, "got SMB2 chained command\n");
 459                 init_chained_smb2_rsp(work);
 460                 return true;
 461         } else if (work->next_smb2_rcv_hdr_off) {
 462                 /*
 463                  * This is last request in chained command,
 464                  * align response to 8 byte
 465                  */
 466                 len = ALIGN(get_rfc1002_len(work->response_buf), 8);
 467                 len = len - get_rfc1002_len(work->response_buf);
 468                 if (len) {
 469                         ksmbd_debug(SMB, "padding len %u\n", len);
 470                         inc_rfc1001_len(work->response_buf, len);
 471                         if (work->aux_payload_sz)
 472                                 work->aux_payload_sz += len;
 473                 }
 474         }
 475         return false;
 476 }
 477
 478 /**
 479  * init_smb2_rsp_hdr() - initialize smb2 response
 480  * @work:       smb work containing smb request buffer
 481  *
 482  * Return:      0
 483  */
 484 int init_smb2_rsp_hdr(struct ksmbd_work *work)
 485 {
 486         struct smb2_hdr *rsp_hdr = smb2_get_msg(work->response_buf);
 487         struct smb2_hdr *rcv_hdr = smb2_get_msg(work->request_buf);
 488         struct ksmbd_conn *conn = work->conn;
 489
 490         memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
 491         *(__be32 *)work->response_buf =
 492                 cpu_to_be32(conn->vals->header_size);
 493         rsp_hdr->ProtocolId = rcv_hdr->ProtocolId;
 494         rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
 495         rsp_hdr->Command = rcv_hdr->Command;
 496
 497         /*
 498          * Message is response. We don't grant oplock yet.
 499          */
 500         rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR);
 501         rsp_hdr->NextCommand = 0;
 502         rsp_hdr->MessageId = rcv_hdr->MessageId;
 503         rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId;
 504         rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId;
 505         rsp_hdr->SessionId = rcv_hdr->SessionId;
 506         memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16);
 507
 508         work->syncronous = true;
 509         if (work->async_id) {
 510                 ksmbd_release_id(&conn->async_ida, work->async_id);
 511                 work->async_id = 0;
 512         }
 513
 514         return 0;
 515 }
 516
 517 /**
 518  * smb2_allocate_rsp_buf() - allocate smb2 response buffer
 519  * @work:       smb work containing smb request buffer
 520  *
 521  * Return:      0 on success, otherwise -ENOMEM
 522  */
 523 int smb2_allocate_rsp_buf(struct ksmbd_work *work)
 524 {
 525         struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
 526         size_t small_sz = MAX_CIFS_SMALL_BUFFER_SIZE;
 527         size_t large_sz = small_sz + work->conn->vals->max_trans_size;
 528         size_t sz = small_sz;
 529         int cmd = le16_to_cpu(hdr->Command);
 530
 531         if (cmd == SMB2_IOCTL_HE || cmd == SMB2_QUERY_DIRECTORY_HE)
 532                 sz = large_sz;
 533
 534         if (cmd == SMB2_QUERY_INFO_HE) {
 535                 struct smb2_query_info_req *req;
 536
 537                 req = smb2_get_msg(work->request_buf);
 538                 if ((req->InfoType == SMB2_O_INFO_FILE &&
 539                      (req->FileInfoClass == FILE_FULL_EA_INFORMATION ||
 540                      req->FileInfoClass == FILE_ALL_INFORMATION)) ||
 541                     req->InfoType == SMB2_O_INFO_SECURITY)
 542                         sz = large_sz;
 543         }
 544
 545         /* allocate large response buf for chained commands */
 546         if (le32_to_cpu(hdr->NextCommand) > 0)
 547                 sz = large_sz;
 548
 549         work->response_buf = kvmalloc(sz, GFP_KERNEL | __GFP_ZERO);
 550         if (!work->response_buf)
 551                 return -ENOMEM;
 552
 553         work->response_sz = sz;
 554         return 0;
 555 }
 556
 557 /**
 558  * smb2_check_user_session() - check for valid session for a user
 559  * @work:       smb work containing smb request buffer
 560  *
 561  * Return:      0 on success, otherwise error
 562  */
 563 int smb2_check_user_session(struct ksmbd_work *work)
 564 {
 565         struct smb2_hdr *req_hdr = smb2_get_msg(work->request_buf);
 566         struct ksmbd_conn *conn = work->conn;
 567         unsigned int cmd = conn->ops->get_cmd_val(work);
 568         unsigned long long sess_id;
 569
 570         work->sess = NULL;
 571         /*
 572          * SMB2_ECHO, SMB2_NEGOTIATE, SMB2_SESSION_SETUP command do not
 573          * require a session id, so no need to validate user session's for
 574          * these commands.
 575          */
 576         if (cmd == SMB2_ECHO_HE || cmd == SMB2_NEGOTIATE_HE ||
 577             cmd == SMB2_SESSION_SETUP_HE)
 578                 return 0;
 579
 580         if (!ksmbd_conn_good(work))
 581                 return -EINVAL;
 582
 583         sess_id = le64_to_cpu(req_hdr->SessionId);
 584         /* Check for validity of user session */
 585         work->sess = ksmbd_session_lookup_all(conn, sess_id);
 586         if (work->sess)
 587                 return 1;
 588         ksmbd_debug(SMB, "Invalid user session, Uid %llu\n", sess_id);
 589         return -EINVAL;
 590 }
 591
 592 static void destroy_previous_session(struct ksmbd_conn *conn,
 593                                      struct ksmbd_user *user, u64 id)
 594 {
 595         struct ksmbd_session *prev_sess = ksmbd_session_lookup_slowpath(id);
 596         struct ksmbd_user *prev_user;
 597         struct channel *chann;
 598
 599         if (!prev_sess)
 600                 return;
 601
 602         prev_user = prev_sess->user;
 603
 604         if (!prev_user ||
 605             strcmp(user->name, prev_user->name) ||
 606             user->passkey_sz != prev_user->passkey_sz ||
 607             memcmp(user->passkey, prev_user->passkey, user->passkey_sz))
 608                 return;
 609
 610         prev_sess->state = SMB2_SESSION_EXPIRED;
 611         write_lock(&prev_sess->chann_lock);
 612         list_for_each_entry(chann, &prev_sess->ksmbd_chann_list, chann_list)
 613                 chann->conn->status = KSMBD_SESS_EXITING;
 614         write_unlock(&prev_sess->chann_lock);
 615 }
 616
 617 /**
 618  * smb2_get_name() - get filename string from on the wire smb format
 619  * @src:        source buffer
 620  * @maxlen:     maxlen of source string
 621  * @local_nls:  nls_table pointer
 622  *
 623  * Return:      matching converted filename on success, otherwise error ptr
 624  */
 625 static char *
 626 smb2_get_name(const char *src, const int maxlen, struct nls_table *local_nls)
 627 {
 628         char *name;
 629
 630         name = smb_strndup_from_utf16(src, maxlen, 1, local_nls);
 631         if (IS_ERR(name)) {
 632                 pr_err("failed to get name %ld\n", PTR_ERR(name));
 633                 return name;
 634         }
 635
 636         ksmbd_conv_path_to_unix(name);
 637         ksmbd_strip_last_slash(name);
 638         return name;
 639 }
 640
 641 int setup_async_work(struct ksmbd_work *work, void (*fn)(void **), void **arg)
 642 {
 643         struct smb2_hdr *rsp_hdr;
 644         struct ksmbd_conn *conn = work->conn;
 645         int id;
 646
 647         rsp_hdr = smb2_get_msg(work->response_buf);
 648         rsp_hdr->Flags |= SMB2_FLAGS_ASYNC_COMMAND;
 649
 650         id = ksmbd_acquire_async_msg_id(&conn->async_ida);
 651         if (id < 0) {
 652                 pr_err("Failed to alloc async message id\n");
 653                 return id;
 654         }
 655         work->syncronous = false;
 656         work->async_id = id;
 657         rsp_hdr->Id.AsyncId = cpu_to_le64(id);
 658
 659         ksmbd_debug(SMB,
 660                     "Send interim Response to inform async request id : %d\n",
 661                     work->async_id);
 662
 663         work->cancel_fn = fn;
 664         work->cancel_argv = arg;
 665
 666         if (list_empty(&work->async_request_entry)) {
 667                 spin_lock(&conn->request_lock);
 668                 list_add_tail(&work->async_request_entry, &conn->async_requests);
 669                 spin_unlock(&conn->request_lock);
 670         }
 671
 672         return 0;
 673 }
 674
 675 void smb2_send_interim_resp(struct ksmbd_work *work, __le32 status)
 676 {
 677         struct smb2_hdr *rsp_hdr;
 678
 679         rsp_hdr = smb2_get_msg(work->response_buf);
 680         smb2_set_err_rsp(work);
 681         rsp_hdr->Status = status;
 682
 683         work->multiRsp = 1;
 684         ksmbd_conn_write(work);
 685         rsp_hdr->Status = 0;
 686         work->multiRsp = 0;
 687 }
 688
 689 static __le32 smb2_get_reparse_tag_special_file(umode_t mode)
 690 {
 691         if (S_ISDIR(mode) || S_ISREG(mode))
 692                 return 0;
 693
 694         if (S_ISLNK(mode))
 695                 return IO_REPARSE_TAG_LX_SYMLINK_LE;
 696         else if (S_ISFIFO(mode))
 697                 return IO_REPARSE_TAG_LX_FIFO_LE;
 698         else if (S_ISSOCK(mode))
 699                 return IO_REPARSE_TAG_AF_UNIX_LE;
 700         else if (S_ISCHR(mode))
 701                 return IO_REPARSE_TAG_LX_CHR_LE;
 702         else if (S_ISBLK(mode))
 703                 return IO_REPARSE_TAG_LX_BLK_LE;
 704
 705         return 0;
 706 }
 707
 708 /**
 709  * smb2_get_dos_mode() - get file mode in dos format from unix mode
 710  * @stat:       kstat containing file mode
 711  * @attribute:  attribute flags
 712  *
 713  * Return:      converted dos mode
 714  */
 715 static int smb2_get_dos_mode(struct kstat *stat, int attribute)
 716 {
 717         int attr = 0;
 718
 719         if (S_ISDIR(stat->mode)) {
 720                 attr = FILE_ATTRIBUTE_DIRECTORY |
 721                         (attribute & (FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM));
 722         } else {
 723                 attr = (attribute & 0x00005137) | FILE_ATTRIBUTE_ARCHIVE;
 724                 attr &= ~(FILE_ATTRIBUTE_DIRECTORY);
 725                 if (S_ISREG(stat->mode) && (server_conf.share_fake_fscaps &
 726                                 FILE_SUPPORTS_SPARSE_FILES))
 727                         attr |= FILE_ATTRIBUTE_SPARSE_FILE;
 728
 729                 if (smb2_get_reparse_tag_special_file(stat->mode))
 730                         attr |= FILE_ATTRIBUTE_REPARSE_POINT;
 731         }
 732
 733         return attr;
 734 }
 735
 736 static void build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt,
 737                                __le16 hash_id)
 738 {
 739         pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES;
 740         pneg_ctxt->DataLength = cpu_to_le16(38);
 741         pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1);
 742         pneg_ctxt->Reserved = cpu_to_le32(0);
 743         pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE);
 744         get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE);
 745         pneg_ctxt->HashAlgorithms = hash_id;
 746 }
 747
 748 static void build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt,
 749                                __le16 cipher_type)
 750 {
 751         pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES;
 752         pneg_ctxt->DataLength = cpu_to_le16(4);
 753         pneg_ctxt->Reserved = cpu_to_le32(0);
 754         pneg_ctxt->CipherCount = cpu_to_le16(1);
 755         pneg_ctxt->Ciphers[0] = cipher_type;
 756 }
 757
 758 static void build_compression_ctxt(struct smb2_compression_capabilities_context *pneg_ctxt,
 759                                    __le16 comp_algo)
 760 {
 761         pneg_ctxt->ContextType = SMB2_COMPRESSION_CAPABILITIES;
 762         pneg_ctxt->DataLength =
 763                 cpu_to_le16(sizeof(struct smb2_compression_capabilities_context)
 764                         - sizeof(struct smb2_neg_context));
 765         pneg_ctxt->Reserved = cpu_to_le32(0);
 766         pneg_ctxt->CompressionAlgorithmCount = cpu_to_le16(1);
 767         pneg_ctxt->Flags = cpu_to_le32(0);
 768         pneg_ctxt->CompressionAlgorithms[0] = comp_algo;
 769 }
 770
 771 static void build_sign_cap_ctxt(struct smb2_signing_capabilities *pneg_ctxt,
 772                                 __le16 sign_algo)
 773 {
 774         pneg_ctxt->ContextType = SMB2_SIGNING_CAPABILITIES;
 775         pneg_ctxt->DataLength =
 776                 cpu_to_le16((sizeof(struct smb2_signing_capabilities) + 2)
 777                         - sizeof(struct smb2_neg_context));
 778         pneg_ctxt->Reserved = cpu_to_le32(0);
 779         pneg_ctxt->SigningAlgorithmCount = cpu_to_le16(1);
 780         pneg_ctxt->SigningAlgorithms[0] = sign_algo;
 781 }
 782
 783 static void build_posix_ctxt(struct smb2_posix_neg_context *pneg_ctxt)
 784 {
 785         pneg_ctxt->ContextType = SMB2_POSIX_EXTENSIONS_AVAILABLE;
 786         pneg_ctxt->DataLength = cpu_to_le16(POSIX_CTXT_DATA_LEN);
 787         /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */
 788         pneg_ctxt->Name[0] = 0x93;
 789         pneg_ctxt->Name[1] = 0xAD;
 790         pneg_ctxt->Name[2] = 0x25;
 791         pneg_ctxt->Name[3] = 0x50;
 792         pneg_ctxt->Name[4] = 0x9C;
 793         pneg_ctxt->Name[5] = 0xB4;
 794         pneg_ctxt->Name[6] = 0x11;
 795         pneg_ctxt->Name[7] = 0xE7;
 796         pneg_ctxt->Name[8] = 0xB4;
 797         pneg_ctxt->Name[9] = 0x23;
 798         pneg_ctxt->Name[10] = 0x83;
 799         pneg_ctxt->Name[11] = 0xDE;
 800         pneg_ctxt->Name[12] = 0x96;
 801         pneg_ctxt->Name[13] = 0x8B;
 802         pneg_ctxt->Name[14] = 0xCD;
 803         pneg_ctxt->Name[15] = 0x7C;
 804 }
 805
 806 static void assemble_neg_contexts(struct ksmbd_conn *conn,
 807                                   struct smb2_negotiate_rsp *rsp,
 808                                   void *smb2_buf_len)
 809 {
 810         char *pneg_ctxt = (char *)rsp +
 811                         le32_to_cpu(rsp->NegotiateContextOffset);
 812         int neg_ctxt_cnt = 1;
 813         int ctxt_size;
 814
 815         ksmbd_debug(SMB,
 816                     "assemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n");
 817         build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt,
 818                            conn->preauth_info->Preauth_HashId);
 819         rsp->NegotiateContextCount = cpu_to_le16(neg_ctxt_cnt);
 820         inc_rfc1001_len(smb2_buf_len, AUTH_GSS_PADDING);
 821         ctxt_size = sizeof(struct smb2_preauth_neg_context);
 822         /* Round to 8 byte boundary */
 823         pneg_ctxt += round_up(sizeof(struct smb2_preauth_neg_context), 8);
 824
 825         if (conn->cipher_type) {
 826                 ctxt_size = round_up(ctxt_size, 8);
 827                 ksmbd_debug(SMB,
 828                             "assemble SMB2_ENCRYPTION_CAPABILITIES context\n");
 829                 build_encrypt_ctxt((struct smb2_encryption_neg_context *)pneg_ctxt,
 830                                    conn->cipher_type);
 831                 rsp->NegotiateContextCount = cpu_to_le16(++neg_ctxt_cnt);
 832                 ctxt_size += sizeof(struct smb2_encryption_neg_context) + 2;
 833                 /* Round to 8 byte boundary */
 834                 pneg_ctxt +=
 835                         round_up(sizeof(struct smb2_encryption_neg_context) + 2,
 836                                  8);
 837         }
 838
 839         if (conn->compress_algorithm) {
 840                 ctxt_size = round_up(ctxt_size, 8);
 841                 ksmbd_debug(SMB,
 842                             "assemble SMB2_COMPRESSION_CAPABILITIES context\n");
 843                 /* Temporarily set to SMB3_COMPRESS_NONE */
 844                 build_compression_ctxt((struct smb2_compression_capabilities_context *)pneg_ctxt,
 845                                        conn->compress_algorithm);
 846                 rsp->NegotiateContextCount = cpu_to_le16(++neg_ctxt_cnt);
 847                 ctxt_size += sizeof(struct smb2_compression_capabilities_context) + 2;
 848                 /* Round to 8 byte boundary */
 849                 pneg_ctxt += round_up(sizeof(struct smb2_compression_capabilities_context) + 2,
 850                                       8);
 851         }
 852
 853         if (conn->posix_ext_supported) {
 854                 ctxt_size = round_up(ctxt_size, 8);
 855                 ksmbd_debug(SMB,
 856                             "assemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n");
 857                 build_posix_ctxt((struct smb2_posix_neg_context *)pneg_ctxt);
 858                 rsp->NegotiateContextCount = cpu_to_le16(++neg_ctxt_cnt);
 859                 ctxt_size += sizeof(struct smb2_posix_neg_context);
 860                 /* Round to 8 byte boundary */
 861                 pneg_ctxt += round_up(sizeof(struct smb2_posix_neg_context), 8);
 862         }
 863
 864         if (conn->signing_negotiated) {
 865                 ctxt_size = round_up(ctxt_size, 8);
 866                 ksmbd_debug(SMB,
 867                             "assemble SMB2_SIGNING_CAPABILITIES context\n");
 868                 build_sign_cap_ctxt((struct smb2_signing_capabilities *)pneg_ctxt,
 869                                     conn->signing_algorithm);
 870                 rsp->NegotiateContextCount = cpu_to_le16(++neg_ctxt_cnt);
 871                 ctxt_size += sizeof(struct smb2_signing_capabilities) + 2;
 872         }
 873
 874         inc_rfc1001_len(smb2_buf_len, ctxt_size);
 875 }
 876
 877 static __le32 decode_preauth_ctxt(struct ksmbd_conn *conn,
 878                                   struct smb2_preauth_neg_context *pneg_ctxt)
 879 {
 880         __le32 err = STATUS_NO_PREAUTH_INTEGRITY_HASH_OVERLAP;
 881
 882         if (pneg_ctxt->HashAlgorithms == SMB2_PREAUTH_INTEGRITY_SHA512) {
 883                 conn->preauth_info->Preauth_HashId =
 884                         SMB2_PREAUTH_INTEGRITY_SHA512;
 885                 err = STATUS_SUCCESS;
 886         }
 887
 888         return err;
 889 }
 890
 891 static void decode_encrypt_ctxt(struct ksmbd_conn *conn,
 892                                 struct smb2_encryption_neg_context *pneg_ctxt,
 893                                 int len_of_ctxts)
 894 {
 895         int cph_cnt = le16_to_cpu(pneg_ctxt->CipherCount);
 896         int i, cphs_size = cph_cnt * sizeof(__le16);
 897
 898         conn->cipher_type = 0;
 899
 900         if (sizeof(struct smb2_encryption_neg_context) + cphs_size >
 901             len_of_ctxts) {
 902                 pr_err("Invalid cipher count(%d)\n", cph_cnt);
 903                 return;
 904         }
 905
 906         if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION_OFF)
 907                 return;
 908
 909         for (i = 0; i < cph_cnt; i++) {
 910                 if (pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_GCM ||
 911                     pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_CCM ||
 912                     pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_CCM ||
 913                     pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_GCM) {
 914                         ksmbd_debug(SMB, "Cipher ID = 0x%x\n",
 915                                     pneg_ctxt->Ciphers[i]);
 916                         conn->cipher_type = pneg_ctxt->Ciphers[i];
 917                         break;
 918                 }
 919         }
 920 }
 921
 922 /**
 923  * smb3_encryption_negotiated() - checks if server and client agreed on enabling encryption
 924  * @conn:       smb connection
 925  *
 926  * Return:      true if connection should be encrypted, else false
 927  */
 928 bool smb3_encryption_negotiated(struct ksmbd_conn *conn)
 929 {
 930         if (!conn->ops->generate_encryptionkey)
 931                 return false;
 932
 933         /*
 934          * SMB 3.0 and 3.0.2 dialects use the SMB2_GLOBAL_CAP_ENCRYPTION flag.
 935          * SMB 3.1.1 uses the cipher_type field.
 936          */
 937         return (conn->vals->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION) ||
 938             conn->cipher_type;
 939 }
 940
 941 static void decode_compress_ctxt(struct ksmbd_conn *conn,
 942                                  struct smb2_compression_capabilities_context *pneg_ctxt)
 943 {
 944         conn->compress_algorithm = SMB3_COMPRESS_NONE;
 945 }
 946
 947 static void decode_sign_cap_ctxt(struct ksmbd_conn *conn,
 948                                  struct smb2_signing_capabilities *pneg_ctxt,
 949                                  int len_of_ctxts)
 950 {
 951         int sign_algo_cnt = le16_to_cpu(pneg_ctxt->SigningAlgorithmCount);
 952         int i, sign_alos_size = sign_algo_cnt * sizeof(__le16);
 953
 954         conn->signing_negotiated = false;
 955
 956         if (sizeof(struct smb2_signing_capabilities) + sign_alos_size >
 957             len_of_ctxts) {
 958                 pr_err("Invalid signing algorithm count(%d)\n", sign_algo_cnt);
 959                 return;
 960         }
 961
 962         for (i = 0; i < sign_algo_cnt; i++) {
 963                 if (pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_HMAC_SHA256_LE ||
 964                     pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_AES_CMAC_LE) {
 965                         ksmbd_debug(SMB, "Signing Algorithm ID = 0x%x\n",
 966                                     pneg_ctxt->SigningAlgorithms[i]);
 967                         conn->signing_negotiated = true;
 968                         conn->signing_algorithm =
 969                                 pneg_ctxt->SigningAlgorithms[i];
 970                         break;
 971                 }
 972         }
 973 }
 974
 975 static __le32 deassemble_neg_contexts(struct ksmbd_conn *conn,
 976                                       struct smb2_negotiate_req *req,
 977                                       int len_of_smb)
 978 {
 979         /* +4 is to account for the RFC1001 len field */
 980         struct smb2_neg_context *pctx = (struct smb2_neg_context *)req;
 981         int i = 0, len_of_ctxts;
 982         int offset = le32_to_cpu(req->NegotiateContextOffset);
 983         int neg_ctxt_cnt = le16_to_cpu(req->NegotiateContextCount);
 984         __le32 status = STATUS_INVALID_PARAMETER;
 985
 986         ksmbd_debug(SMB, "decoding %d negotiate contexts\n", neg_ctxt_cnt);
 987         if (len_of_smb <= offset) {
 988                 ksmbd_debug(SMB, "Invalid response: negotiate context offset\n");
 989                 return status;
 990         }
 991
 992         len_of_ctxts = len_of_smb - offset;
 993
 994         while (i++ < neg_ctxt_cnt) {
 995                 int clen;
 996
 997                 /* check that offset is not beyond end of SMB */
 998                 if (len_of_ctxts == 0)
 999                         break;
1000
1001                 if (len_of_ctxts < sizeof(struct smb2_neg_context))
1002                         break;
1003
1004                 pctx = (struct smb2_neg_context *)((char *)pctx + offset);
1005                 clen = le16_to_cpu(pctx->DataLength);
1006                 if (clen + sizeof(struct smb2_neg_context) > len_of_ctxts)
1007                         break;
1008
1009                 if (pctx->ContextType == SMB2_PREAUTH_INTEGRITY_CAPABILITIES) {
1010                         ksmbd_debug(SMB,
1011                                     "deassemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n");
1012                         if (conn->preauth_info->Preauth_HashId)
1013                                 break;
1014
1015                         status = decode_preauth_ctxt(conn,
1016                                                      (struct smb2_preauth_neg_context *)pctx);
1017                         if (status != STATUS_SUCCESS)
1018                                 break;
1019                 } else if (pctx->ContextType == SMB2_ENCRYPTION_CAPABILITIES) {
1020                         ksmbd_debug(SMB,
1021                                     "deassemble SMB2_ENCRYPTION_CAPABILITIES context\n");
1022                         if (conn->cipher_type)
1023                                 break;
1024
1025                         decode_encrypt_ctxt(conn,
1026                                             (struct smb2_encryption_neg_context *)pctx,
1027                                             len_of_ctxts);
1028                 } else if (pctx->ContextType == SMB2_COMPRESSION_CAPABILITIES) {
1029                         ksmbd_debug(SMB,
1030                                     "deassemble SMB2_COMPRESSION_CAPABILITIES context\n");
1031                         if (conn->compress_algorithm)
1032                                 break;
1033
1034                         decode_compress_ctxt(conn,
1035                                              (struct smb2_compression_capabilities_context *)pctx);
1036                 } else if (pctx->ContextType == SMB2_NETNAME_NEGOTIATE_CONTEXT_ID) {
1037                         ksmbd_debug(SMB,
1038                                     "deassemble SMB2_NETNAME_NEGOTIATE_CONTEXT_ID context\n");
1039                 } else if (pctx->ContextType == SMB2_POSIX_EXTENSIONS_AVAILABLE) {
1040                         ksmbd_debug(SMB,
1041                                     "deassemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n");
1042                         conn->posix_ext_supported = true;
1043                 } else if (pctx->ContextType == SMB2_SIGNING_CAPABILITIES) {
1044                         ksmbd_debug(SMB,
1045                                     "deassemble SMB2_SIGNING_CAPABILITIES context\n");
1046                         decode_sign_cap_ctxt(conn,
1047                                              (struct smb2_signing_capabilities *)pctx,
1048                                              len_of_ctxts);
1049                 }
1050
1051                 /* offsets must be 8 byte aligned */
1052                 clen = (clen + 7) & ~0x7;
1053                 offset = clen + sizeof(struct smb2_neg_context);
1054                 len_of_ctxts -= clen + sizeof(struct smb2_neg_context);
1055         }
1056         return status;
1057 }
1058
1059 /**
1060  * smb2_handle_negotiate() - handler for smb2 negotiate command
1061  * @work:       smb work containing smb request buffer
1062  *
1063  * Return:      0
1064  */
1065 int smb2_handle_negotiate(struct ksmbd_work *work)
1066 {
1067         struct ksmbd_conn *conn = work->conn;
1068         struct smb2_negotiate_req *req = smb2_get_msg(work->request_buf);
1069         struct smb2_negotiate_rsp *rsp = smb2_get_msg(work->response_buf);
1070         int rc = 0;
1071         unsigned int smb2_buf_len, smb2_neg_size;
1072         __le32 status;
1073
1074         ksmbd_debug(SMB, "Received negotiate request\n");
1075         conn->need_neg = false;
1076         if (ksmbd_conn_good(work)) {
1077                 pr_err("conn->tcp_status is already in CifsGood State\n");
1078                 work->send_no_response = 1;
1079                 return rc;
1080         }
1081
1082         if (req->DialectCount == 0) {
1083                 pr_err("malformed packet\n");
1084                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1085                 rc = -EINVAL;
1086                 goto err_out;
1087         }
1088
1089         smb2_buf_len = get_rfc1002_len(work->request_buf);
1090         smb2_neg_size = offsetof(struct smb2_negotiate_req, Dialects);
1091         if (smb2_neg_size > smb2_buf_len) {
1092                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1093                 rc = -EINVAL;
1094                 goto err_out;
1095         }
1096
1097         if (conn->dialect == SMB311_PROT_ID) {
1098                 unsigned int nego_ctxt_off = le32_to_cpu(req->NegotiateContextOffset);
1099
1100                 if (smb2_buf_len < nego_ctxt_off) {
1101                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1102                         rc = -EINVAL;
1103                         goto err_out;
1104                 }
1105
1106                 if (smb2_neg_size > nego_ctxt_off) {
1107                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1108                         rc = -EINVAL;
1109                         goto err_out;
1110                 }
1111
1112                 if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) >
1113                     nego_ctxt_off) {
1114                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1115                         rc = -EINVAL;
1116                         goto err_out;
1117                 }
1118         } else {
1119                 if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) >
1120                     smb2_buf_len) {
1121                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1122                         rc = -EINVAL;
1123                         goto err_out;
1124                 }
1125         }
1126
1127         conn->cli_cap = le32_to_cpu(req->Capabilities);
1128         switch (conn->dialect) {
1129         case SMB311_PROT_ID:
1130                 conn->preauth_info =
1131                         kzalloc(sizeof(struct preauth_integrity_info),
1132                                 GFP_KERNEL);
1133                 if (!conn->preauth_info) {
1134                         rc = -ENOMEM;
1135                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1136                         goto err_out;
1137                 }
1138
1139                 status = deassemble_neg_contexts(conn, req,
1140                                                  get_rfc1002_len(work->request_buf));
1141                 if (status != STATUS_SUCCESS) {
1142                         pr_err("deassemble_neg_contexts error(0x%x)\n",
1143                                status);
1144                         rsp->hdr.Status = status;
1145                         rc = -EINVAL;
1146                         kfree(conn->preauth_info);
1147                         conn->preauth_info = NULL;
1148                         goto err_out;
1149                 }
1150
1151                 rc = init_smb3_11_server(conn);
1152                 if (rc < 0) {
1153                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1154                         kfree(conn->preauth_info);
1155                         conn->preauth_info = NULL;
1156                         goto err_out;
1157                 }
1158
1159                 ksmbd_gen_preauth_integrity_hash(conn,
1160                                                  work->request_buf,
1161                                                  conn->preauth_info->Preauth_HashValue);
1162                 rsp->NegotiateContextOffset =
1163                                 cpu_to_le32(OFFSET_OF_NEG_CONTEXT);
1164                 assemble_neg_contexts(conn, rsp, work->response_buf);
1165                 break;
1166         case SMB302_PROT_ID:
1167                 init_smb3_02_server(conn);
1168                 break;
1169         case SMB30_PROT_ID:
1170                 init_smb3_0_server(conn);
1171                 break;
1172         case SMB21_PROT_ID:
1173                 init_smb2_1_server(conn);
1174                 break;
1175         case SMB2X_PROT_ID:
1176         case BAD_PROT_ID:
1177         default:
1178                 ksmbd_debug(SMB, "Server dialect :0x%x not supported\n",
1179                             conn->dialect);
1180                 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
1181                 rc = -EINVAL;
1182                 goto err_out;
1183         }
1184         rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
1185
1186         /* For stats */
1187         conn->connection_type = conn->dialect;
1188
1189         rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size);
1190         rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size);
1191         rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size);
1192
1193         memcpy(conn->ClientGUID, req->ClientGUID,
1194                         SMB2_CLIENT_GUID_SIZE);
1195         conn->cli_sec_mode = le16_to_cpu(req->SecurityMode);
1196
1197         rsp->StructureSize = cpu_to_le16(65);
1198         rsp->DialectRevision = cpu_to_le16(conn->dialect);
1199         /* Not setting conn guid rsp->ServerGUID, as it
1200          * not used by client for identifying server
1201          */
1202         memset(rsp->ServerGUID, 0, SMB2_CLIENT_GUID_SIZE);
1203
1204         rsp->SystemTime = cpu_to_le64(ksmbd_systime());
1205         rsp->ServerStartTime = 0;
1206         ksmbd_debug(SMB, "negotiate context offset %d, count %d\n",
1207                     le32_to_cpu(rsp->NegotiateContextOffset),
1208                     le16_to_cpu(rsp->NegotiateContextCount));
1209
1210         rsp->SecurityBufferOffset = cpu_to_le16(128);
1211         rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH);
1212         ksmbd_copy_gss_neg_header((char *)(&rsp->hdr) +
1213                                   le16_to_cpu(rsp->SecurityBufferOffset));
1214         inc_rfc1001_len(work->response_buf, sizeof(struct smb2_negotiate_rsp) -
1215                         sizeof(struct smb2_hdr) - sizeof(rsp->Buffer) +
1216                          AUTH_GSS_LENGTH);
1217         rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE;
1218         conn->use_spnego = true;
1219
1220         if ((server_conf.signing == KSMBD_CONFIG_OPT_AUTO ||
1221              server_conf.signing == KSMBD_CONFIG_OPT_DISABLED) &&
1222             req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED_LE)
1223                 conn->sign = true;
1224         else if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY) {
1225                 server_conf.enforced_signing = true;
1226                 rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE;
1227                 conn->sign = true;
1228         }
1229
1230         conn->srv_sec_mode = le16_to_cpu(rsp->SecurityMode);
1231         ksmbd_conn_set_need_negotiate(work);
1232
1233 err_out:
1234         if (rc < 0)
1235                 smb2_set_err_rsp(work);
1236
1237         return rc;
1238 }
1239
1240 static int alloc_preauth_hash(struct ksmbd_session *sess,
1241                               struct ksmbd_conn *conn)
1242 {
1243         if (sess->Preauth_HashValue)
1244                 return 0;
1245
1246         sess->Preauth_HashValue = kmemdup(conn->preauth_info->Preauth_HashValue,
1247                                           PREAUTH_HASHVALUE_SIZE, GFP_KERNEL);
1248         if (!sess->Preauth_HashValue)
1249                 return -ENOMEM;
1250
1251         return 0;
1252 }
1253
1254 static int generate_preauth_hash(struct ksmbd_work *work)
1255 {
1256         struct ksmbd_conn *conn = work->conn;
1257         struct ksmbd_session *sess = work->sess;
1258         u8 *preauth_hash;
1259
1260         if (conn->dialect != SMB311_PROT_ID)
1261                 return 0;
1262
1263         if (conn->binding) {
1264                 struct preauth_session *preauth_sess;
1265
1266                 preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id);
1267                 if (!preauth_sess) {
1268                         preauth_sess = ksmbd_preauth_session_alloc(conn, sess->id);
1269                         if (!preauth_sess)
1270                                 return -ENOMEM;
1271                 }
1272
1273                 preauth_hash = preauth_sess->Preauth_HashValue;
1274         } else {
1275                 if (!sess->Preauth_HashValue)
1276                         if (alloc_preauth_hash(sess, conn))
1277                                 return -ENOMEM;
1278                 preauth_hash = sess->Preauth_HashValue;
1279         }
1280
1281         ksmbd_gen_preauth_integrity_hash(conn, work->request_buf, preauth_hash);
1282         return 0;
1283 }
1284
1285 static int decode_negotiation_token(struct ksmbd_conn *conn,
1286                                     struct negotiate_message *negblob,
1287                                     size_t sz)
1288 {
1289         if (!conn->use_spnego)
1290                 return -EINVAL;
1291
1292         if (ksmbd_decode_negTokenInit((char *)negblob, sz, conn)) {
1293                 if (ksmbd_decode_negTokenTarg((char *)negblob, sz, conn)) {
1294                         conn->auth_mechs |= KSMBD_AUTH_NTLMSSP;
1295                         conn->preferred_auth_mech = KSMBD_AUTH_NTLMSSP;
1296                         conn->use_spnego = false;
1297                 }
1298         }
1299         return 0;
1300 }
1301
1302 static int ntlm_negotiate(struct ksmbd_work *work,
1303                           struct negotiate_message *negblob,
1304                           size_t negblob_len)
1305 {
1306         struct smb2_sess_setup_rsp *rsp = smb2_get_msg(work->response_buf);
1307         struct challenge_message *chgblob;
1308         unsigned char *spnego_blob = NULL;
1309         u16 spnego_blob_len;
1310         char *neg_blob;
1311         int sz, rc;
1312
1313         ksmbd_debug(SMB, "negotiate phase\n");
1314         rc = ksmbd_decode_ntlmssp_neg_blob(negblob, negblob_len, work->conn);
1315         if (rc)
1316                 return rc;
1317
1318         sz = le16_to_cpu(rsp->SecurityBufferOffset);
1319         chgblob =
1320                 (struct challenge_message *)((char *)&rsp->hdr.ProtocolId + sz);
1321         memset(chgblob, 0, sizeof(struct challenge_message));
1322
1323         if (!work->conn->use_spnego) {
1324                 sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn);
1325                 if (sz < 0)
1326                         return -ENOMEM;
1327
1328                 rsp->SecurityBufferLength = cpu_to_le16(sz);
1329                 return 0;
1330         }
1331
1332         sz = sizeof(struct challenge_message);
1333         sz += (strlen(ksmbd_netbios_name()) * 2 + 1 + 4) * 6;
1334
1335         neg_blob = kzalloc(sz, GFP_KERNEL);
1336         if (!neg_blob)
1337                 return -ENOMEM;
1338
1339         chgblob = (struct challenge_message *)neg_blob;
1340         sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn);
1341         if (sz < 0) {
1342                 rc = -ENOMEM;
1343                 goto out;
1344         }
1345
1346         rc = build_spnego_ntlmssp_neg_blob(&spnego_blob, &spnego_blob_len,
1347                                            neg_blob, sz);
1348         if (rc) {
1349                 rc = -ENOMEM;
1350                 goto out;
1351         }
1352
1353         sz = le16_to_cpu(rsp->SecurityBufferOffset);
1354         memcpy((char *)&rsp->hdr.ProtocolId + sz, spnego_blob, spnego_blob_len);
1355         rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len);
1356
1357 out:
1358         kfree(spnego_blob);
1359         kfree(neg_blob);
1360         return rc;
1361 }
1362
1363 static struct authenticate_message *user_authblob(struct ksmbd_conn *conn,
1364                                                   struct smb2_sess_setup_req *req)
1365 {
1366         int sz;
1367
1368         if (conn->use_spnego && conn->mechToken)
1369                 return (struct authenticate_message *)conn->mechToken;
1370
1371         sz = le16_to_cpu(req->SecurityBufferOffset);
1372         return (struct authenticate_message *)((char *)&req->hdr.ProtocolId
1373                                                + sz);
1374 }
1375
1376 static struct ksmbd_user *session_user(struct ksmbd_conn *conn,
1377                                        struct smb2_sess_setup_req *req)
1378 {
1379         struct authenticate_message *authblob;
1380         struct ksmbd_user *user;
1381         char *name;
1382         unsigned int auth_msg_len, name_off, name_len, secbuf_len;
1383
1384         secbuf_len = le16_to_cpu(req->SecurityBufferLength);
1385         if (secbuf_len < sizeof(struct authenticate_message)) {
1386                 ksmbd_debug(SMB, "blob len %d too small\n", secbuf_len);
1387                 return NULL;
1388         }
1389         authblob = user_authblob(conn, req);
1390         name_off = le32_to_cpu(authblob->UserName.BufferOffset);
1391         name_len = le16_to_cpu(authblob->UserName.Length);
1392         auth_msg_len = le16_to_cpu(req->SecurityBufferOffset) + secbuf_len;
1393
1394         if (auth_msg_len < (u64)name_off + name_len)
1395                 return NULL;
1396
1397         name = smb_strndup_from_utf16((const char *)authblob + name_off,
1398                                       name_len,
1399                                       true,
1400                                       conn->local_nls);
1401         if (IS_ERR(name)) {
1402                 pr_err("cannot allocate memory\n");
1403                 return NULL;
1404         }
1405
1406         ksmbd_debug(SMB, "session setup request for user %s\n", name);
1407         user = ksmbd_login_user(name);
1408         kfree(name);
1409         return user;
1410 }
1411
1412 static int ntlm_authenticate(struct ksmbd_work *work)
1413 {
1414         struct smb2_sess_setup_req *req = smb2_get_msg(work->request_buf);
1415         struct smb2_sess_setup_rsp *rsp = smb2_get_msg(work->response_buf);
1416         struct ksmbd_conn *conn = work->conn;
1417         struct ksmbd_session *sess = work->sess;
1418         struct channel *chann = NULL;
1419         struct ksmbd_user *user;
1420         u64 prev_id;
1421         int sz, rc;
1422
1423         ksmbd_debug(SMB, "authenticate phase\n");
1424         if (conn->use_spnego) {
1425                 unsigned char *spnego_blob;
1426                 u16 spnego_blob_len;
1427
1428                 rc = build_spnego_ntlmssp_auth_blob(&spnego_blob,
1429                                                     &spnego_blob_len,
1430                                                     0);
1431                 if (rc)
1432                         return -ENOMEM;
1433
1434                 sz = le16_to_cpu(rsp->SecurityBufferOffset);
1435                 memcpy((char *)&rsp->hdr.ProtocolId + sz, spnego_blob, spnego_blob_len);
1436                 rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len);
1437                 kfree(spnego_blob);
1438                 inc_rfc1001_len(work->response_buf, spnego_blob_len - 1);
1439         }
1440
1441         user = session_user(conn, req);
1442         if (!user) {
1443                 ksmbd_debug(SMB, "Unknown user name or an error\n");
1444                 return -EPERM;
1445         }
1446
1447         /* Check for previous session */
1448         prev_id = le64_to_cpu(req->PreviousSessionId);
1449         if (prev_id && prev_id != sess->id)
1450                 destroy_previous_session(conn, user, prev_id);
1451
1452         if (sess->state == SMB2_SESSION_VALID) {
1453                 /*
1454                  * Reuse session if anonymous try to connect
1455                  * on reauthetication.
1456                  */
1457                 if (ksmbd_anonymous_user(user)) {
1458                         ksmbd_free_user(user);
1459                         return 0;
1460                 }
1461
1462                 if (!ksmbd_compare_user(sess->user, user)) {
1463                         ksmbd_free_user(user);
1464                         return -EPERM;
1465                 }
1466                 ksmbd_free_user(user);
1467         } else {
1468                 sess->user = user;
1469         }
1470
1471         if (user_guest(sess->user)) {
1472                 rsp->SessionFlags = SMB2_SESSION_FLAG_IS_GUEST_LE;
1473         } else {
1474                 struct authenticate_message *authblob;
1475
1476                 authblob = user_authblob(conn, req);
1477                 sz = le16_to_cpu(req->SecurityBufferLength);
1478                 rc = ksmbd_decode_ntlmssp_auth_blob(authblob, sz, conn, sess);
1479                 if (rc) {
1480                         set_user_flag(sess->user, KSMBD_USER_FLAG_BAD_PASSWORD);
1481                         ksmbd_debug(SMB, "authentication failed\n");
1482                         return -EPERM;
1483                 }
1484         }
1485
1486         /*
1487          * If session state is SMB2_SESSION_VALID, We can assume
1488          * that it is reauthentication. And the user/password
1489          * has been verified, so return it here.
1490          */
1491         if (sess->state == SMB2_SESSION_VALID) {
1492                 if (conn->binding)
1493                         goto binding_session;
1494                 return 0;
1495         }
1496
1497         if ((rsp->SessionFlags != SMB2_SESSION_FLAG_IS_GUEST_LE &&
1498              (conn->sign || server_conf.enforced_signing)) ||
1499             (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED))
1500                 sess->sign = true;
1501
1502         if (smb3_encryption_negotiated(conn) &&
1503                         !(req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) {
1504                 rc = conn->ops->generate_encryptionkey(conn, sess);
1505                 if (rc) {
1506                         ksmbd_debug(SMB,
1507                                         "SMB3 encryption key generation failed\n");
1508                         return -EINVAL;
1509                 }
1510                 sess->enc = true;
1511                 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION)
1512                         rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE;
1513                 /*
1514                  * signing is disable if encryption is enable
1515                  * on this session
1516                  */
1517                 sess->sign = false;
1518         }
1519
1520 binding_session:
1521         if (conn->dialect >= SMB30_PROT_ID) {
1522                 read_lock(&sess->chann_lock);
1523                 chann = lookup_chann_list(sess, conn);
1524                 read_unlock(&sess->chann_lock);
1525                 if (!chann) {
1526                         chann = kmalloc(sizeof(struct channel), GFP_KERNEL);
1527                         if (!chann)
1528                                 return -ENOMEM;
1529
1530                         chann->conn = conn;
1531                         INIT_LIST_HEAD(&chann->chann_list);
1532                         write_lock(&sess->chann_lock);
1533                         list_add(&chann->chann_list, &sess->ksmbd_chann_list);
1534                         write_unlock(&sess->chann_lock);
1535                 }
1536         }
1537
1538         if (conn->ops->generate_signingkey) {
1539                 rc = conn->ops->generate_signingkey(sess, conn);
1540                 if (rc) {
1541                         ksmbd_debug(SMB, "SMB3 signing key generation failed\n");
1542                         return -EINVAL;
1543                 }
1544         }
1545
1546         if (!ksmbd_conn_lookup_dialect(conn)) {
1547                 pr_err("fail to verify the dialect\n");
1548                 return -ENOENT;
1549         }
1550         return 0;
1551 }
1552
1553 #ifdef CONFIG_SMB_SERVER_KERBEROS5
1554 static int krb5_authenticate(struct ksmbd_work *work)
1555 {
1556         struct smb2_sess_setup_req *req = smb2_get_msg(work->request_buf);
1557         struct smb2_sess_setup_rsp *rsp = smb2_get_msg(work->response_buf);
1558         struct ksmbd_conn *conn = work->conn;
1559         struct ksmbd_session *sess = work->sess;
1560         char *in_blob, *out_blob;
1561         struct channel *chann = NULL;
1562         u64 prev_sess_id;
1563         int in_len, out_len;
1564         int retval;
1565
1566         in_blob = (char *)&req->hdr.ProtocolId +
1567                 le16_to_cpu(req->SecurityBufferOffset);
1568         in_len = le16_to_cpu(req->SecurityBufferLength);
1569         out_blob = (char *)&rsp->hdr.ProtocolId +
1570                 le16_to_cpu(rsp->SecurityBufferOffset);
1571         out_len = work->response_sz -
1572                 (le16_to_cpu(rsp->SecurityBufferOffset) + 4);
1573
1574         /* Check previous session */
1575         prev_sess_id = le64_to_cpu(req->PreviousSessionId);
1576         if (prev_sess_id && prev_sess_id != sess->id)
1577                 destroy_previous_session(conn, sess->user, prev_sess_id);
1578
1579         if (sess->state == SMB2_SESSION_VALID)
1580                 ksmbd_free_user(sess->user);
1581
1582         retval = ksmbd_krb5_authenticate(sess, in_blob, in_len,
1583                                          out_blob, &out_len);
1584         if (retval) {
1585                 ksmbd_debug(SMB, "krb5 authentication failed\n");
1586                 return -EINVAL;
1587         }
1588         rsp->SecurityBufferLength = cpu_to_le16(out_len);
1589         inc_rfc1001_len(work->response_buf, out_len - 1);
1590
1591         if ((conn->sign || server_conf.enforced_signing) ||
1592             (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED))
1593                 sess->sign = true;
1594
1595         if (smb3_encryption_negotiated(conn)) {
1596                 retval = conn->ops->generate_encryptionkey(conn, sess);
1597                 if (retval) {
1598                         ksmbd_debug(SMB,
1599                                     "SMB3 encryption key generation failed\n");
1600                         return -EINVAL;
1601                 }
1602                 sess->enc = true;
1603                 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION)
1604                         rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE;
1605                 sess->sign = false;
1606         }
1607
1608         if (conn->dialect >= SMB30_PROT_ID) {
1609                 read_lock(&sess->chann_lock);
1610                 chann = lookup_chann_list(sess, conn);
1611                 read_unlock(&sess->chann_lock);
1612                 if (!chann) {
1613                         chann = kmalloc(sizeof(struct channel), GFP_KERNEL);
1614                         if (!chann)
1615                                 return -ENOMEM;
1616
1617                         chann->conn = conn;
1618                         INIT_LIST_HEAD(&chann->chann_list);
1619                         write_lock(&sess->chann_lock);
1620                         list_add(&chann->chann_list, &sess->ksmbd_chann_list);
1621                         write_unlock(&sess->chann_lock);
1622                 }
1623         }
1624
1625         if (conn->ops->generate_signingkey) {
1626                 retval = conn->ops->generate_signingkey(sess, conn);
1627                 if (retval) {
1628                         ksmbd_debug(SMB, "SMB3 signing key generation failed\n");
1629                         return -EINVAL;
1630                 }
1631         }
1632
1633         if (!ksmbd_conn_lookup_dialect(conn)) {
1634                 pr_err("fail to verify the dialect\n");
1635                 return -ENOENT;
1636         }
1637         return 0;
1638 }
1639 #else
1640 static int krb5_authenticate(struct ksmbd_work *work)
1641 {
1642         return -EOPNOTSUPP;
1643 }
1644 #endif
1645
1646 int smb2_sess_setup(struct ksmbd_work *work)
1647 {
1648         struct ksmbd_conn *conn = work->conn;
1649         struct smb2_sess_setup_req *req = smb2_get_msg(work->request_buf);
1650         struct smb2_sess_setup_rsp *rsp = smb2_get_msg(work->response_buf);
1651         struct ksmbd_session *sess;
1652         struct negotiate_message *negblob;
1653         unsigned int negblob_len, negblob_off;
1654         int rc = 0;
1655
1656         ksmbd_debug(SMB, "Received request for session setup\n");
1657
1658         rsp->StructureSize = cpu_to_le16(9);
1659         rsp->SessionFlags = 0;
1660         rsp->SecurityBufferOffset = cpu_to_le16(72);
1661         rsp->SecurityBufferLength = 0;
1662         inc_rfc1001_len(work->response_buf, 9);
1663
1664         if (!req->hdr.SessionId) {
1665                 sess = ksmbd_smb2_session_create();
1666                 if (!sess) {
1667                         rc = -ENOMEM;
1668                         goto out_err;
1669                 }
1670                 rsp->hdr.SessionId = cpu_to_le64(sess->id);
1671                 rc = ksmbd_session_register(conn, sess);
1672                 if (rc)
1673                         goto out_err;
1674         } else if (conn->dialect >= SMB30_PROT_ID &&
1675                    (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) &&
1676                    req->Flags & SMB2_SESSION_REQ_FLAG_BINDING) {
1677                 u64 sess_id = le64_to_cpu(req->hdr.SessionId);
1678
1679                 sess = ksmbd_session_lookup_slowpath(sess_id);
1680                 if (!sess) {
1681                         rc = -ENOENT;
1682                         goto out_err;
1683                 }
1684
1685                 if (conn->dialect != sess->dialect) {
1686                         rc = -EINVAL;
1687                         goto out_err;
1688                 }
1689
1690                 if (!(req->hdr.Flags & SMB2_FLAGS_SIGNED)) {
1691                         rc = -EINVAL;
1692                         goto out_err;
1693                 }
1694
1695                 if (strncmp(conn->ClientGUID, sess->ClientGUID,
1696                             SMB2_CLIENT_GUID_SIZE)) {
1697                         rc = -ENOENT;
1698                         goto out_err;
1699                 }
1700
1701                 if (sess->state == SMB2_SESSION_IN_PROGRESS) {
1702                         rc = -EACCES;
1703                         goto out_err;
1704                 }
1705
1706                 if (sess->state == SMB2_SESSION_EXPIRED) {
1707                         rc = -EFAULT;
1708                         goto out_err;
1709                 }
1710
1711                 if (ksmbd_session_lookup(conn, sess_id)) {
1712                         rc = -EACCES;
1713                         goto out_err;
1714                 }
1715
1716                 conn->binding = true;
1717         } else if ((conn->dialect < SMB30_PROT_ID ||
1718                     server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) &&
1719                    (req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) {
1720                 sess = NULL;
1721                 rc = -EACCES;
1722                 goto out_err;
1723         } else {
1724                 sess = ksmbd_session_lookup(conn,
1725                                             le64_to_cpu(req->hdr.SessionId));
1726                 if (!sess) {
1727                         rc = -ENOENT;
1728                         goto out_err;
1729                 }
1730         }
1731         work->sess = sess;
1732
1733         if (sess->state == SMB2_SESSION_EXPIRED)
1734                 sess->state = SMB2_SESSION_IN_PROGRESS;
1735
1736         negblob_off = le16_to_cpu(req->SecurityBufferOffset);
1737         negblob_len = le16_to_cpu(req->SecurityBufferLength);
1738         if (negblob_off < offsetof(struct smb2_sess_setup_req, Buffer) ||
1739             negblob_len < offsetof(struct negotiate_message, NegotiateFlags)) {
1740                 rc = -EINVAL;
1741                 goto out_err;
1742         }
1743
1744         negblob = (struct negotiate_message *)((char *)&req->hdr.ProtocolId +
1745                         negblob_off);
1746
1747         if (decode_negotiation_token(conn, negblob, negblob_len) == 0) {
1748                 if (conn->mechToken)
1749                         negblob = (struct negotiate_message *)conn->mechToken;
1750         }
1751
1752         if (server_conf.auth_mechs & conn->auth_mechs) {
1753                 rc = generate_preauth_hash(work);
1754                 if (rc)
1755                         goto out_err;
1756
1757                 if (conn->preferred_auth_mech &
1758                                 (KSMBD_AUTH_KRB5 | KSMBD_AUTH_MSKRB5)) {
1759                         rc = krb5_authenticate(work);
1760                         if (rc) {
1761                                 rc = -EINVAL;
1762                                 goto out_err;
1763                         }
1764
1765                         ksmbd_conn_set_good(work);
1766                         sess->state = SMB2_SESSION_VALID;
1767                         kfree(sess->Preauth_HashValue);
1768                         sess->Preauth_HashValue = NULL;
1769                 } else if (conn->preferred_auth_mech == KSMBD_AUTH_NTLMSSP) {
1770                         if (negblob->MessageType == NtLmNegotiate) {
1771                                 rc = ntlm_negotiate(work, negblob, negblob_len);
1772                                 if (rc)
1773                                         goto out_err;
1774                                 rsp->hdr.Status =
1775                                         STATUS_MORE_PROCESSING_REQUIRED;
1776                                 /*
1777                                  * Note: here total size -1 is done as an
1778                                  * adjustment for 0 size blob
1779                                  */
1780                                 inc_rfc1001_len(work->response_buf,
1781                                                 le16_to_cpu(rsp->SecurityBufferLength) - 1);
1782
1783                         } else if (negblob->MessageType == NtLmAuthenticate) {
1784                                 rc = ntlm_authenticate(work);
1785                                 if (rc)
1786                                         goto out_err;
1787
1788                                 ksmbd_conn_set_good(work);
1789                                 sess->state = SMB2_SESSION_VALID;
1790                                 if (conn->binding) {
1791                                         struct preauth_session *preauth_sess;
1792
1793                                         preauth_sess =
1794                                                 ksmbd_preauth_session_lookup(conn, sess->id);
1795                                         if (preauth_sess) {
1796                                                 list_del(&preauth_sess->preauth_entry);
1797                                                 kfree(preauth_sess);
1798                                         }
1799                                 }
1800                                 kfree(sess->Preauth_HashValue);
1801                                 sess->Preauth_HashValue = NULL;
1802                         }
1803                 } else {
1804                         /* TODO: need one more negotiation */
1805                         pr_err("Not support the preferred authentication\n");
1806                         rc = -EINVAL;
1807                 }
1808         } else {
1809                 pr_err("Not support authentication\n");
1810                 rc = -EINVAL;
1811         }
1812
1813 out_err:
1814         if (rc == -EINVAL)
1815                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1816         else if (rc == -ENOENT)
1817                 rsp->hdr.Status = STATUS_USER_SESSION_DELETED;
1818         else if (rc == -EACCES)
1819                 rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED;
1820         else if (rc == -EFAULT)
1821                 rsp->hdr.Status = STATUS_NETWORK_SESSION_EXPIRED;
1822         else if (rc == -ENOMEM)
1823                 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
1824         else if (rc)
1825                 rsp->hdr.Status = STATUS_LOGON_FAILURE;
1826
1827         if (conn->use_spnego && conn->mechToken) {
1828                 kfree(conn->mechToken);
1829                 conn->mechToken = NULL;
1830         }
1831
1832         if (rc < 0) {
1833                 /*
1834                  * SecurityBufferOffset should be set to zero
1835                  * in session setup error response.
1836                  */
1837                 rsp->SecurityBufferOffset = 0;
1838
1839                 if (sess) {
1840                         bool try_delay = false;
1841
1842                         /*
1843                          * To avoid dictionary attacks (repeated session setups rapidly sent) to
1844                          * connect to server, ksmbd make a delay of a 5 seconds on session setup
1845                          * failure to make it harder to send enough random connection requests
1846                          * to break into a server.
1847                          */
1848                         if (sess->user && sess->user->flags & KSMBD_USER_FLAG_DELAY_SESSION)
1849                                 try_delay = true;
1850
1851                         xa_erase(&conn->sessions, sess->id);
1852                         ksmbd_session_destroy(sess);
1853                         work->sess = NULL;
1854                         if (try_delay)
1855                                 ssleep(5);
1856                 }
1857         }
1858
1859         return rc;
1860 }
1861
1862 /**
1863  * smb2_tree_connect() - handler for smb2 tree connect command
1864  * @work:       smb work containing smb request buffer
1865  *
1866  * Return:      0 on success, otherwise error
1867  */
1868 int smb2_tree_connect(struct ksmbd_work *work)
1869 {
1870         struct ksmbd_conn *conn = work->conn;
1871         struct smb2_tree_connect_req *req = smb2_get_msg(work->request_buf);
1872         struct smb2_tree_connect_rsp *rsp = smb2_get_msg(work->response_buf);
1873         struct ksmbd_session *sess = work->sess;
1874         char *treename = NULL, *name = NULL;
1875         struct ksmbd_tree_conn_status status;
1876         struct ksmbd_share_config *share;
1877         int rc = -EINVAL;
1878
1879         treename = smb_strndup_from_utf16(req->Buffer,
1880                                           le16_to_cpu(req->PathLength), true,
1881                                           conn->local_nls);
1882         if (IS_ERR(treename)) {
1883                 pr_err("treename is NULL\n");
1884                 status.ret = KSMBD_TREE_CONN_STATUS_ERROR;
1885                 goto out_err1;
1886         }
1887
1888         name = ksmbd_extract_sharename(conn->um, treename);
1889         if (IS_ERR(name)) {
1890                 status.ret = KSMBD_TREE_CONN_STATUS_ERROR;
1891                 goto out_err1;
1892         }
1893
1894         ksmbd_debug(SMB, "tree connect request for tree %s treename %s\n",
1895                     name, treename);
1896
1897         status = ksmbd_tree_conn_connect(conn, sess, name);
1898         if (status.ret == KSMBD_TREE_CONN_STATUS_OK)
1899                 rsp->hdr.Id.SyncId.TreeId = cpu_to_le32(status.tree_conn->id);
1900         else
1901                 goto out_err1;
1902
1903         share = status.tree_conn->share_conf;
1904         if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) {
1905                 ksmbd_debug(SMB, "IPC share path request\n");
1906                 rsp->ShareType = SMB2_SHARE_TYPE_PIPE;
1907                 rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE |
1908                         FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE |
1909                         FILE_DELETE_LE | FILE_READ_CONTROL_LE |
1910                         FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE |
1911                         FILE_SYNCHRONIZE_LE;
1912         } else {
1913                 rsp->ShareType = SMB2_SHARE_TYPE_DISK;
1914                 rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE |
1915                         FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE;
1916                 if (test_tree_conn_flag(status.tree_conn,
1917                                         KSMBD_TREE_CONN_FLAG_WRITABLE)) {
1918                         rsp->MaximalAccess |= FILE_WRITE_DATA_LE |
1919                                 FILE_APPEND_DATA_LE | FILE_WRITE_EA_LE |
1920                                 FILE_DELETE_LE | FILE_WRITE_ATTRIBUTES_LE |
1921                                 FILE_DELETE_CHILD_LE | FILE_READ_CONTROL_LE |
1922                                 FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE |
1923                                 FILE_SYNCHRONIZE_LE;
1924                 }
1925         }
1926
1927         status.tree_conn->maximal_access = le32_to_cpu(rsp->MaximalAccess);
1928         if (conn->posix_ext_supported)
1929                 status.tree_conn->posix_extensions = true;
1930
1931 out_err1:
1932         rsp->StructureSize = cpu_to_le16(16);
1933         rsp->Capabilities = 0;
1934         rsp->Reserved = 0;
1935         /* default manual caching */
1936         rsp->ShareFlags = SMB2_SHAREFLAG_MANUAL_CACHING;
1937         inc_rfc1001_len(work->response_buf, 16);
1938
1939         if (!IS_ERR(treename))
1940                 kfree(treename);
1941         if (!IS_ERR(name))
1942                 kfree(name);
1943
1944         switch (status.ret) {
1945         case KSMBD_TREE_CONN_STATUS_OK:
1946                 rsp->hdr.Status = STATUS_SUCCESS;
1947                 rc = 0;
1948                 break;
1949         case -ESTALE:
1950         case -ENOENT:
1951         case KSMBD_TREE_CONN_STATUS_NO_SHARE:
1952                 rsp->hdr.Status = STATUS_BAD_NETWORK_NAME;
1953                 break;
1954         case -ENOMEM:
1955         case KSMBD_TREE_CONN_STATUS_NOMEM:
1956                 rsp->hdr.Status = STATUS_NO_MEMORY;
1957                 break;
1958         case KSMBD_TREE_CONN_STATUS_ERROR:
1959         case KSMBD_TREE_CONN_STATUS_TOO_MANY_CONNS:
1960         case KSMBD_TREE_CONN_STATUS_TOO_MANY_SESSIONS:
1961                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
1962                 break;
1963         case -EINVAL:
1964                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1965                 break;
1966         default:
1967                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
1968         }
1969
1970         return rc;
1971 }
1972
1973 /**
1974  * smb2_create_open_flags() - convert smb open flags to unix open flags
1975  * @file_present:       is file already present
1976  * @access:             file access flags
1977  * @disposition:        file disposition flags
1978  * @may_flags:          set with MAY_ flags
1979  *
1980  * Return:      file open flags
1981  */
1982 static int smb2_create_open_flags(bool file_present, __le32 access,
1983                                   __le32 disposition,
1984                                   int *may_flags)
1985 {
1986         int oflags = O_NONBLOCK | O_LARGEFILE;
1987
1988         if (access & FILE_READ_DESIRED_ACCESS_LE &&
1989             access & FILE_WRITE_DESIRE_ACCESS_LE) {
1990                 oflags |= O_RDWR;
1991                 *may_flags = MAY_OPEN | MAY_READ | MAY_WRITE;
1992         } else if (access & FILE_WRITE_DESIRE_ACCESS_LE) {
1993                 oflags |= O_WRONLY;
1994                 *may_flags = MAY_OPEN | MAY_WRITE;
1995         } else {
1996                 oflags |= O_RDONLY;
1997                 *may_flags = MAY_OPEN | MAY_READ;
1998         }
1999
2000         if (access == FILE_READ_ATTRIBUTES_LE)
2001                 oflags |= O_PATH;
2002
2003         if (file_present) {
2004                 switch (disposition & FILE_CREATE_MASK_LE) {
2005                 case FILE_OPEN_LE:
2006                 case FILE_CREATE_LE:
2007                         break;
2008                 case FILE_SUPERSEDE_LE:
2009                 case FILE_OVERWRITE_LE:
2010                 case FILE_OVERWRITE_IF_LE:
2011                         oflags |= O_TRUNC;
2012                         break;
2013                 default:
2014                         break;
2015                 }
2016         } else {
2017                 switch (disposition & FILE_CREATE_MASK_LE) {
2018                 case FILE_SUPERSEDE_LE:
2019                 case FILE_CREATE_LE:
2020                 case FILE_OPEN_IF_LE:
2021                 case FILE_OVERWRITE_IF_LE:
2022                         oflags |= O_CREAT;
2023                         break;
2024                 case FILE_OPEN_LE:
2025                 case FILE_OVERWRITE_LE:
2026                         oflags &= ~O_CREAT;
2027                         break;
2028                 default:
2029                         break;
2030                 }
2031         }
2032
2033         return oflags;
2034 }
2035
2036 /**
2037  * smb2_tree_disconnect() - handler for smb tree connect request
2038  * @work:       smb work containing request buffer
2039  *
2040  * Return:      0
2041  */
2042 int smb2_tree_disconnect(struct ksmbd_work *work)
2043 {
2044         struct smb2_tree_disconnect_rsp *rsp = smb2_get_msg(work->response_buf);
2045         struct ksmbd_session *sess = work->sess;
2046         struct ksmbd_tree_connect *tcon = work->tcon;
2047
2048         rsp->StructureSize = cpu_to_le16(4);
2049         inc_rfc1001_len(work->response_buf, 4);
2050
2051         ksmbd_debug(SMB, "request\n");
2052
2053         if (!tcon) {
2054                 struct smb2_tree_disconnect_req *req =
2055                         smb2_get_msg(work->request_buf);
2056
2057                 ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId);
2058                 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2059                 smb2_set_err_rsp(work);
2060                 return 0;
2061         }
2062
2063         ksmbd_close_tree_conn_fds(work);
2064         ksmbd_tree_conn_disconnect(sess, tcon);
2065         work->tcon = NULL;
2066         return 0;
2067 }
2068
2069 /**
2070  * smb2_session_logoff() - handler for session log off request
2071  * @work:       smb work containing request buffer
2072  *
2073  * Return:      0
2074  */
2075 int smb2_session_logoff(struct ksmbd_work *work)
2076 {
2077         struct ksmbd_conn *conn = work->conn;
2078         struct smb2_logoff_rsp *rsp = smb2_get_msg(work->response_buf);
2079         struct ksmbd_session *sess = work->sess;
2080
2081         rsp->StructureSize = cpu_to_le16(4);
2082         inc_rfc1001_len(work->response_buf, 4);
2083
2084         ksmbd_debug(SMB, "request\n");
2085
2086         /* setting CifsExiting here may race with start_tcp_sess */
2087         ksmbd_conn_set_need_reconnect(work);
2088         ksmbd_close_session_fds(work);
2089         ksmbd_conn_wait_idle(conn);
2090
2091         if (ksmbd_tree_conn_session_logoff(sess)) {
2092                 struct smb2_logoff_req *req = smb2_get_msg(work->request_buf);
2093
2094                 ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId);
2095                 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2096                 smb2_set_err_rsp(work);
2097                 return 0;
2098         }
2099
2100         ksmbd_destroy_file_table(&sess->file_table);
2101         sess->state = SMB2_SESSION_EXPIRED;
2102
2103         ksmbd_free_user(sess->user);
2104         sess->user = NULL;
2105
2106         /* let start_tcp_sess free connection info now */
2107         ksmbd_conn_set_need_negotiate(work);
2108         return 0;
2109 }
2110
2111 /**
2112  * create_smb2_pipe() - create IPC pipe
2113  * @work:       smb work containing request buffer
2114  *
2115  * Return:      0 on success, otherwise error
2116  */
2117 static noinline int create_smb2_pipe(struct ksmbd_work *work)
2118 {
2119         struct smb2_create_rsp *rsp = smb2_get_msg(work->response_buf);
2120         struct smb2_create_req *req = smb2_get_msg(work->request_buf);
2121         int id;
2122         int err;
2123         char *name;
2124
2125         name = smb_strndup_from_utf16(req->Buffer, le16_to_cpu(req->NameLength),
2126                                       1, work->conn->local_nls);
2127         if (IS_ERR(name)) {
2128                 rsp->hdr.Status = STATUS_NO_MEMORY;
2129                 err = PTR_ERR(name);
2130                 goto out;
2131         }
2132
2133         id = ksmbd_session_rpc_open(work->sess, name);
2134         if (id < 0) {
2135                 pr_err("Unable to open RPC pipe: %d\n", id);
2136                 err = id;
2137                 goto out;
2138         }
2139
2140         rsp->hdr.Status = STATUS_SUCCESS;
2141         rsp->StructureSize = cpu_to_le16(89);
2142         rsp->OplockLevel = SMB2_OPLOCK_LEVEL_NONE;
2143         rsp->Flags = 0;
2144         rsp->CreateAction = cpu_to_le32(FILE_OPENED);
2145
2146         rsp->CreationTime = cpu_to_le64(0);
2147         rsp->LastAccessTime = cpu_to_le64(0);
2148         rsp->ChangeTime = cpu_to_le64(0);
2149         rsp->AllocationSize = cpu_to_le64(0);
2150         rsp->EndofFile = cpu_to_le64(0);
2151         rsp->FileAttributes = FILE_ATTRIBUTE_NORMAL_LE;
2152         rsp->Reserved2 = 0;
2153         rsp->VolatileFileId = id;
2154         rsp->PersistentFileId = 0;
2155         rsp->CreateContextsOffset = 0;
2156         rsp->CreateContextsLength = 0;
2157
2158         inc_rfc1001_len(work->response_buf, 88); /* StructureSize - 1*/
2159         kfree(name);
2160         return 0;
2161
2162 out:
2163         switch (err) {
2164         case -EINVAL:
2165                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
2166                 break;
2167         case -ENOSPC:
2168         case -ENOMEM:
2169                 rsp->hdr.Status = STATUS_NO_MEMORY;
2170                 break;
2171         }
2172
2173         if (!IS_ERR(name))
2174                 kfree(name);
2175
2176         smb2_set_err_rsp(work);
2177         return err;
2178 }
2179
2180 /**
2181  * smb2_set_ea() - handler for setting extended attributes using set
2182  *              info command
2183  * @eabuf:      set info command buffer
2184  * @buf_len:    set info command buffer length
2185  * @path:       dentry path for get ea
2186  *
2187  * Return:      0 on success, otherwise error
2188  */
2189 static int smb2_set_ea(struct smb2_ea_info *eabuf, unsigned int buf_len,
2190                        const struct path *path)
2191 {
2192         struct user_namespace *user_ns = mnt_user_ns(path->mnt);
2193         char *attr_name = NULL, *value;
2194         int rc = 0;
2195         unsigned int next = 0;
2196
2197         if (buf_len < sizeof(struct smb2_ea_info) + eabuf->EaNameLength +
2198                         le16_to_cpu(eabuf->EaValueLength))
2199                 return -EINVAL;
2200
2201         attr_name = kmalloc(XATTR_NAME_MAX + 1, GFP_KERNEL);
2202         if (!attr_name)
2203                 return -ENOMEM;
2204
2205         do {
2206                 if (!eabuf->EaNameLength)
2207                         goto next;
2208
2209                 ksmbd_debug(SMB,
2210                             "name : <%s>, name_len : %u, value_len : %u, next : %u\n",
2211                             eabuf->name, eabuf->EaNameLength,
2212                             le16_to_cpu(eabuf->EaValueLength),
2213                             le32_to_cpu(eabuf->NextEntryOffset));
2214
2215                 if (eabuf->EaNameLength >
2216                     (XATTR_NAME_MAX - XATTR_USER_PREFIX_LEN)) {
2217                         rc = -EINVAL;
2218                         break;
2219                 }
2220
2221                 memcpy(attr_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN);
2222                 memcpy(&attr_name[XATTR_USER_PREFIX_LEN], eabuf->name,
2223                        eabuf->EaNameLength);
2224                 attr_name[XATTR_USER_PREFIX_LEN + eabuf->EaNameLength] = '\0';
2225                 value = (char *)&eabuf->name + eabuf->EaNameLength + 1;
2226
2227                 if (!eabuf->EaValueLength) {
2228                         rc = ksmbd_vfs_casexattr_len(user_ns,
2229                                                      path->dentry,
2230                                                      attr_name,
2231                                                      XATTR_USER_PREFIX_LEN +
2232                                                      eabuf->EaNameLength);
2233
2234                         /* delete the EA only when it exits */
2235                         if (rc > 0) {
2236                                 rc = ksmbd_vfs_remove_xattr(user_ns,
2237                                                             path->dentry,
2238                                                             attr_name);
2239
2240                                 if (rc < 0) {
2241                                         ksmbd_debug(SMB,
2242                                                     "remove xattr failed(%d)\n",
2243                                                     rc);
2244                                         break;
2245                                 }
2246                         }
2247
2248                         /* if the EA doesn't exist, just do nothing. */
2249                         rc = 0;
2250                 } else {
2251                         rc = ksmbd_vfs_setxattr(user_ns,
2252                                                 path->dentry, attr_name, value,
2253                                                 le16_to_cpu(eabuf->EaValueLength), 0);
2254                         if (rc < 0) {
2255                                 ksmbd_debug(SMB,
2256                                             "ksmbd_vfs_setxattr is failed(%d)\n",
2257                                             rc);
2258                                 break;
2259                         }
2260                 }
2261
2262 next:
2263                 next = le32_to_cpu(eabuf->NextEntryOffset);
2264                 if (next == 0 || buf_len < next)
2265                         break;
2266                 buf_len -= next;
2267                 eabuf = (struct smb2_ea_info *)((char *)eabuf + next);
2268                 if (next < (u32)eabuf->EaNameLength + le16_to_cpu(eabuf->EaValueLength))
2269                         break;
2270
2271         } while (next != 0);
2272
2273         kfree(attr_name);
2274         return rc;
2275 }
2276
2277 static noinline int smb2_set_stream_name_xattr(const struct path *path,
2278                                                struct ksmbd_file *fp,
2279                                                char *stream_name, int s_type)
2280 {
2281         struct user_namespace *user_ns = mnt_user_ns(path->mnt);
2282         size_t xattr_stream_size;
2283         char *xattr_stream_name;
2284         int rc;
2285
2286         rc = ksmbd_vfs_xattr_stream_name(stream_name,
2287                                          &xattr_stream_name,
2288                                          &xattr_stream_size,
2289                                          s_type);
2290         if (rc)
2291                 return rc;
2292
2293         fp->stream.name = xattr_stream_name;
2294         fp->stream.size = xattr_stream_size;
2295
2296         /* Check if there is stream prefix in xattr space */
2297         rc = ksmbd_vfs_casexattr_len(user_ns,
2298                                      path->dentry,
2299                                      xattr_stream_name,
2300                                      xattr_stream_size);
2301         if (rc >= 0)
2302                 return 0;
2303
2304         if (fp->cdoption == FILE_OPEN_LE) {
2305                 ksmbd_debug(SMB, "XATTR stream name lookup failed: %d\n", rc);
2306                 return -EBADF;
2307         }
2308
2309         rc = ksmbd_vfs_setxattr(user_ns, path->dentry,
2310                                 xattr_stream_name, NULL, 0, 0);
2311         if (rc < 0)
2312                 pr_err("Failed to store XATTR stream name :%d\n", rc);
2313         return 0;
2314 }
2315
2316 static int smb2_remove_smb_xattrs(const struct path *path)
2317 {
2318         struct user_namespace *user_ns = mnt_user_ns(path->mnt);
2319         char *name, *xattr_list = NULL;
2320         ssize_t xattr_list_len;
2321         int err = 0;
2322
2323         xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
2324         if (xattr_list_len < 0) {
2325                 goto out;
2326         } else if (!xattr_list_len) {
2327                 ksmbd_debug(SMB, "empty xattr in the file\n");
2328                 goto out;
2329         }
2330
2331         for (name = xattr_list; name - xattr_list < xattr_list_len;
2332                         name += strlen(name) + 1) {
2333                 ksmbd_debug(SMB, "%s, len %zd\n", name, strlen(name));
2334
2335                 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN) &&
2336                     !strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX,
2337                              STREAM_PREFIX_LEN)) {
2338                         err = ksmbd_vfs_remove_xattr(user_ns, path->dentry,
2339                                                      name);
2340                         if (err)
2341                                 ksmbd_debug(SMB, "remove xattr failed : %s\n",
2342                                             name);
2343                 }
2344         }
2345 out:
2346         kvfree(xattr_list);
2347         return err;
2348 }
2349
2350 static int smb2_create_truncate(const struct path *path)
2351 {
2352         int rc = vfs_truncate(path, 0);
2353
2354         if (rc) {
2355                 pr_err("vfs_truncate failed, rc %d\n", rc);
2356                 return rc;
2357         }
2358
2359         rc = smb2_remove_smb_xattrs(path);
2360         if (rc == -EOPNOTSUPP)
2361                 rc = 0;
2362         if (rc)
2363                 ksmbd_debug(SMB,
2364                             "ksmbd_truncate_stream_name_xattr failed, rc %d\n",
2365                             rc);
2366         return rc;
2367 }
2368
2369 static void smb2_new_xattrs(struct ksmbd_tree_connect *tcon, const struct path *path,
2370                             struct ksmbd_file *fp)
2371 {
2372         struct xattr_dos_attrib da = {0};
2373         int rc;
2374
2375         if (!test_share_config_flag(tcon->share_conf,
2376                                     KSMBD_SHARE_FLAG_STORE_DOS_ATTRS))
2377                 return;
2378
2379         da.version = 4;
2380         da.attr = le32_to_cpu(fp->f_ci->m_fattr);
2381         da.itime = da.create_time = fp->create_time;
2382         da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME |
2383                 XATTR_DOSINFO_ITIME;
2384
2385         rc = ksmbd_vfs_set_dos_attrib_xattr(mnt_user_ns(path->mnt),
2386                                             path->dentry, &da);
2387         if (rc)
2388                 ksmbd_debug(SMB, "failed to store file attribute into xattr\n");
2389 }
2390
2391 static void smb2_update_xattrs(struct ksmbd_tree_connect *tcon,
2392                                const struct path *path, struct ksmbd_file *fp)
2393 {
2394         struct xattr_dos_attrib da;
2395         int rc;
2396
2397         fp->f_ci->m_fattr &= ~(FILE_ATTRIBUTE_HIDDEN_LE | FILE_ATTRIBUTE_SYSTEM_LE);
2398
2399         /* get FileAttributes from XATTR_NAME_DOS_ATTRIBUTE */
2400         if (!test_share_config_flag(tcon->share_conf,
2401                                     KSMBD_SHARE_FLAG_STORE_DOS_ATTRS))
2402                 return;
2403
2404         rc = ksmbd_vfs_get_dos_attrib_xattr(mnt_user_ns(path->mnt),
2405                                             path->dentry, &da);
2406         if (rc > 0) {
2407                 fp->f_ci->m_fattr = cpu_to_le32(da.attr);
2408                 fp->create_time = da.create_time;
2409                 fp->itime = da.itime;
2410         }
2411 }
2412
2413 static int smb2_creat(struct ksmbd_work *work, struct path *path, char *name,
2414                       int open_flags, umode_t posix_mode, bool is_dir)
2415 {
2416         struct ksmbd_tree_connect *tcon = work->tcon;
2417         struct ksmbd_share_config *share = tcon->share_conf;
2418         umode_t mode;
2419         int rc;
2420
2421         if (!(open_flags & O_CREAT))
2422                 return -EBADF;
2423
2424         ksmbd_debug(SMB, "file does not exist, so creating\n");
2425         if (is_dir == true) {
2426                 ksmbd_debug(SMB, "creating directory\n");
2427
2428                 mode = share_config_directory_mode(share, posix_mode);
2429                 rc = ksmbd_vfs_mkdir(work, name, mode);
2430                 if (rc)
2431                         return rc;
2432         } else {
2433                 ksmbd_debug(SMB, "creating regular file\n");
2434
2435                 mode = share_config_create_mode(share, posix_mode);
2436                 rc = ksmbd_vfs_create(work, name, mode);
2437                 if (rc)
2438                         return rc;
2439         }
2440
2441         rc = ksmbd_vfs_kern_path(work, name, 0, path, 0);
2442         if (rc) {
2443                 pr_err("cannot get linux path (%s), err = %d\n",
2444                        name, rc);
2445                 return rc;
2446         }
2447         return 0;
2448 }
2449
2450 static int smb2_create_sd_buffer(struct ksmbd_work *work,
2451                                  struct smb2_create_req *req,
2452                                  const struct path *path)
2453 {
2454         struct create_context *context;
2455         struct create_sd_buf_req *sd_buf;
2456
2457         if (!req->CreateContextsOffset)
2458                 return -ENOENT;
2459
2460         /* Parse SD BUFFER create contexts */
2461         context = smb2_find_context_vals(req, SMB2_CREATE_SD_BUFFER);
2462         if (!context)
2463                 return -ENOENT;
2464         else if (IS_ERR(context))
2465                 return PTR_ERR(context);
2466
2467         ksmbd_debug(SMB,
2468                     "Set ACLs using SMB2_CREATE_SD_BUFFER context\n");
2469         sd_buf = (struct create_sd_buf_req *)context;
2470         if (le16_to_cpu(context->DataOffset) +
2471             le32_to_cpu(context->DataLength) <
2472             sizeof(struct create_sd_buf_req))
2473                 return -EINVAL;
2474         return set_info_sec(work->conn, work->tcon, path, &sd_buf->ntsd,
2475                             le32_to_cpu(sd_buf->ccontext.DataLength), true);
2476 }
2477
2478 static void ksmbd_acls_fattr(struct smb_fattr *fattr,
2479                              struct user_namespace *mnt_userns,
2480                              struct inode *inode)
2481 {
2482         vfsuid_t vfsuid = i_uid_into_vfsuid(mnt_userns, inode);
2483         vfsgid_t vfsgid = i_gid_into_vfsgid(mnt_userns, inode);
2484
2485         fattr->cf_uid = vfsuid_into_kuid(vfsuid);
2486         fattr->cf_gid = vfsgid_into_kgid(vfsgid);
2487         fattr->cf_mode = inode->i_mode;
2488         fattr->cf_acls = NULL;
2489         fattr->cf_dacls = NULL;
2490
2491         if (IS_ENABLED(CONFIG_FS_POSIX_ACL)) {
2492                 fattr->cf_acls = get_inode_acl(inode, ACL_TYPE_ACCESS);
2493                 if (S_ISDIR(inode->i_mode))
2494                         fattr->cf_dacls = get_inode_acl(inode, ACL_TYPE_DEFAULT);
2495         }
2496 }
2497
2498 /**
2499  * smb2_open() - handler for smb file open request
2500  * @work:       smb work containing request buffer
2501  *
2502  * Return:      0 on success, otherwise error
2503  */
2504 int smb2_open(struct ksmbd_work *work)
2505 {
2506         struct ksmbd_conn *conn = work->conn;
2507         struct ksmbd_session *sess = work->sess;
2508         struct ksmbd_tree_connect *tcon = work->tcon;
2509         struct smb2_create_req *req;
2510         struct smb2_create_rsp *rsp;
2511         struct path path;
2512         struct ksmbd_share_config *share = tcon->share_conf;
2513         struct ksmbd_file *fp = NULL;
2514         struct file *filp = NULL;
2515         struct user_namespace *user_ns = NULL;
2516         struct kstat stat;
2517         struct create_context *context;
2518         struct lease_ctx_info *lc = NULL;
2519         struct create_ea_buf_req *ea_buf = NULL;
2520         struct oplock_info *opinfo;
2521         __le32 *next_ptr = NULL;
2522         int req_op_level = 0, open_flags = 0, may_flags = 0, file_info = 0;
2523         int rc = 0;
2524         int contxt_cnt = 0, query_disk_id = 0;
2525         int maximal_access_ctxt = 0, posix_ctxt = 0;
2526         int s_type = 0;
2527         int next_off = 0;
2528         char *name = NULL;
2529         char *stream_name = NULL;
2530         bool file_present = false, created = false, already_permitted = false;
2531         int share_ret, need_truncate = 0;
2532         u64 time;
2533         umode_t posix_mode = 0;
2534         __le32 daccess, maximal_access = 0;
2535
2536         WORK_BUFFERS(work, req, rsp);
2537
2538         if (req->hdr.NextCommand && !work->next_smb2_rcv_hdr_off &&
2539             (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)) {
2540                 ksmbd_debug(SMB, "invalid flag in chained command\n");
2541                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
2542                 smb2_set_err_rsp(work);
2543                 return -EINVAL;
2544         }
2545
2546         if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) {
2547                 ksmbd_debug(SMB, "IPC pipe create request\n");
2548                 return create_smb2_pipe(work);
2549         }
2550
2551         if (req->NameLength) {
2552                 if ((req->CreateOptions & FILE_DIRECTORY_FILE_LE) &&
2553                     *(char *)req->Buffer == '\\') {
2554                         pr_err("not allow directory name included leading slash\n");
2555                         rc = -EINVAL;
2556                         goto err_out1;
2557                 }
2558
2559                 name = smb2_get_name(req->Buffer,
2560                                      le16_to_cpu(req->NameLength),
2561                                      work->conn->local_nls);
2562                 if (IS_ERR(name)) {
2563                         rc = PTR_ERR(name);
2564                         if (rc != -ENOMEM)
2565                                 rc = -ENOENT;
2566                         name = NULL;
2567                         goto err_out1;
2568                 }
2569
2570                 ksmbd_debug(SMB, "converted name = %s\n", name);
2571                 if (strchr(name, ':')) {
2572                         if (!test_share_config_flag(work->tcon->share_conf,
2573                                                     KSMBD_SHARE_FLAG_STREAMS)) {
2574                                 rc = -EBADF;
2575                                 goto err_out1;
2576                         }
2577                         rc = parse_stream_name(name, &stream_name, &s_type);
2578                         if (rc < 0)
2579                                 goto err_out1;
2580                 }
2581
2582                 rc = ksmbd_validate_filename(name);
2583                 if (rc < 0)
2584                         goto err_out1;
2585
2586                 if (ksmbd_share_veto_filename(share, name)) {
2587                         rc = -ENOENT;
2588                         ksmbd_debug(SMB, "Reject open(), vetoed file: %s\n",
2589                                     name);
2590                         goto err_out1;
2591                 }
2592         } else {
2593                 name = kstrdup("", GFP_KERNEL);
2594                 if (!name) {
2595                         rc = -ENOMEM;
2596                         goto err_out1;
2597                 }
2598         }
2599
2600         req_op_level = req->RequestedOplockLevel;
2601         if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE)
2602                 lc = parse_lease_state(req);
2603
2604         if (le32_to_cpu(req->ImpersonationLevel) > le32_to_cpu(IL_DELEGATE)) {
2605                 pr_err("Invalid impersonationlevel : 0x%x\n",
2606                        le32_to_cpu(req->ImpersonationLevel));
2607                 rc = -EIO;
2608                 rsp->hdr.Status = STATUS_BAD_IMPERSONATION_LEVEL;
2609                 goto err_out1;
2610         }
2611
2612         if (req->CreateOptions && !(req->CreateOptions & CREATE_OPTIONS_MASK_LE)) {
2613                 pr_err("Invalid create options : 0x%x\n",
2614                        le32_to_cpu(req->CreateOptions));
2615                 rc = -EINVAL;
2616                 goto err_out1;
2617         } else {
2618                 if (req->CreateOptions & FILE_SEQUENTIAL_ONLY_LE &&
2619                     req->CreateOptions & FILE_RANDOM_ACCESS_LE)
2620                         req->CreateOptions = ~(FILE_SEQUENTIAL_ONLY_LE);
2621
2622                 if (req->CreateOptions &
2623                     (FILE_OPEN_BY_FILE_ID_LE | CREATE_TREE_CONNECTION |
2624                      FILE_RESERVE_OPFILTER_LE)) {
2625                         rc = -EOPNOTSUPP;
2626                         goto err_out1;
2627                 }
2628
2629                 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) {
2630                         if (req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE) {
2631                                 rc = -EINVAL;
2632                                 goto err_out1;
2633                         } else if (req->CreateOptions & FILE_NO_COMPRESSION_LE) {
2634                                 req->CreateOptions = ~(FILE_NO_COMPRESSION_LE);
2635                         }
2636                 }
2637         }
2638
2639         if (le32_to_cpu(req->CreateDisposition) >
2640             le32_to_cpu(FILE_OVERWRITE_IF_LE)) {
2641                 pr_err("Invalid create disposition : 0x%x\n",
2642                        le32_to_cpu(req->CreateDisposition));
2643                 rc = -EINVAL;
2644                 goto err_out1;
2645         }
2646
2647         if (!(req->DesiredAccess & DESIRED_ACCESS_MASK)) {
2648                 pr_err("Invalid desired access : 0x%x\n",
2649                        le32_to_cpu(req->DesiredAccess));
2650                 rc = -EACCES;
2651                 goto err_out1;
2652         }
2653
2654         if (req->FileAttributes && !(req->FileAttributes & FILE_ATTRIBUTE_MASK_LE)) {
2655                 pr_err("Invalid file attribute : 0x%x\n",
2656                        le32_to_cpu(req->FileAttributes));
2657                 rc = -EINVAL;
2658                 goto err_out1;
2659         }
2660
2661         if (req->CreateContextsOffset) {
2662                 /* Parse non-durable handle create contexts */
2663                 context = smb2_find_context_vals(req, SMB2_CREATE_EA_BUFFER);
2664                 if (IS_ERR(context)) {
2665                         rc = PTR_ERR(context);
2666                         goto err_out1;
2667                 } else if (context) {
2668                         ea_buf = (struct create_ea_buf_req *)context;
2669                         if (le16_to_cpu(context->DataOffset) +
2670                             le32_to_cpu(context->DataLength) <
2671                             sizeof(struct create_ea_buf_req)) {
2672                                 rc = -EINVAL;
2673                                 goto err_out1;
2674                         }
2675                         if (req->CreateOptions & FILE_NO_EA_KNOWLEDGE_LE) {
2676                                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
2677                                 rc = -EACCES;
2678                                 goto err_out1;
2679                         }
2680                 }
2681
2682                 context = smb2_find_context_vals(req,
2683                                                  SMB2_CREATE_QUERY_MAXIMAL_ACCESS_REQUEST);
2684                 if (IS_ERR(context)) {
2685                         rc = PTR_ERR(context);
2686                         goto err_out1;
2687                 } else if (context) {
2688                         ksmbd_debug(SMB,
2689                                     "get query maximal access context\n");
2690                         maximal_access_ctxt = 1;
2691                 }
2692
2693                 context = smb2_find_context_vals(req,
2694                                                  SMB2_CREATE_TIMEWARP_REQUEST);
2695                 if (IS_ERR(context)) {
2696                         rc = PTR_ERR(context);
2697                         goto err_out1;
2698                 } else if (context) {
2699                         ksmbd_debug(SMB, "get timewarp context\n");
2700                         rc = -EBADF;
2701                         goto err_out1;
2702                 }
2703
2704                 if (tcon->posix_extensions) {
2705                         context = smb2_find_context_vals(req,
2706                                                          SMB2_CREATE_TAG_POSIX);
2707                         if (IS_ERR(context)) {
2708                                 rc = PTR_ERR(context);
2709                                 goto err_out1;
2710                         } else if (context) {
2711                                 struct create_posix *posix =
2712                                         (struct create_posix *)context;
2713                                 if (le16_to_cpu(context->DataOffset) +
2714                                     le32_to_cpu(context->DataLength) <
2715                                     sizeof(struct create_posix) - 4) {
2716                                         rc = -EINVAL;
2717                                         goto err_out1;
2718                                 }
2719                                 ksmbd_debug(SMB, "get posix context\n");
2720
2721                                 posix_mode = le32_to_cpu(posix->Mode);
2722                                 posix_ctxt = 1;
2723                         }
2724                 }
2725         }
2726
2727         if (ksmbd_override_fsids(work)) {
2728                 rc = -ENOMEM;
2729                 goto err_out1;
2730         }
2731
2732         rc = ksmbd_vfs_kern_path(work, name, LOOKUP_NO_SYMLINKS, &path, 1);
2733         if (!rc) {
2734                 if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE) {
2735                         /*
2736                          * If file exists with under flags, return access
2737                          * denied error.
2738                          */
2739                         if (req->CreateDisposition == FILE_OVERWRITE_IF_LE ||
2740                             req->CreateDisposition == FILE_OPEN_IF_LE) {
2741                                 rc = -EACCES;
2742                                 path_put(&path);
2743                                 goto err_out;
2744                         }
2745
2746                         if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
2747                                 ksmbd_debug(SMB,
2748                                             "User does not have write permission\n");
2749                                 rc = -EACCES;
2750                                 path_put(&path);
2751                                 goto err_out;
2752                         }
2753                 } else if (d_is_symlink(path.dentry)) {
2754                         rc = -EACCES;
2755                         path_put(&path);
2756                         goto err_out;
2757                 }
2758         }
2759
2760         if (rc) {
2761                 if (rc != -ENOENT)
2762                         goto err_out;
2763                 ksmbd_debug(SMB, "can not get linux path for %s, rc = %d\n",
2764                             name, rc);
2765                 rc = 0;
2766         } else {
2767                 file_present = true;
2768                 user_ns = mnt_user_ns(path.mnt);
2769         }
2770         if (stream_name) {
2771                 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) {
2772                         if (s_type == DATA_STREAM) {
2773                                 rc = -EIO;
2774                                 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
2775                         }
2776                 } else {
2777                         if (file_present && S_ISDIR(d_inode(path.dentry)->i_mode) &&
2778                             s_type == DATA_STREAM) {
2779                                 rc = -EIO;
2780                                 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
2781                         }
2782                 }
2783
2784                 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE &&
2785                     req->FileAttributes & FILE_ATTRIBUTE_NORMAL_LE) {
2786                         rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
2787                         rc = -EIO;
2788                 }
2789
2790                 if (rc < 0)
2791                         goto err_out;
2792         }
2793
2794         if (file_present && req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE &&
2795             S_ISDIR(d_inode(path.dentry)->i_mode) &&
2796             !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
2797                 ksmbd_debug(SMB, "open() argument is a directory: %s, %x\n",
2798                             name, req->CreateOptions);
2799                 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
2800                 rc = -EIO;
2801                 goto err_out;
2802         }
2803
2804         if (file_present && (req->CreateOptions & FILE_DIRECTORY_FILE_LE) &&
2805             !(req->CreateDisposition == FILE_CREATE_LE) &&
2806             !S_ISDIR(d_inode(path.dentry)->i_mode)) {
2807                 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
2808                 rc = -EIO;
2809                 goto err_out;
2810         }
2811
2812         if (!stream_name && file_present &&
2813             req->CreateDisposition == FILE_CREATE_LE) {
2814                 rc = -EEXIST;
2815                 goto err_out;
2816         }
2817
2818         daccess = smb_map_generic_desired_access(req->DesiredAccess);
2819
2820         if (file_present && !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
2821                 rc = smb_check_perm_dacl(conn, &path, &daccess,
2822                                          sess->user->uid);
2823                 if (rc)
2824                         goto err_out;
2825         }
2826
2827         if (daccess & FILE_MAXIMAL_ACCESS_LE) {
2828                 if (!file_present) {
2829                         daccess = cpu_to_le32(GENERIC_ALL_FLAGS);
2830                 } else {
2831                         rc = ksmbd_vfs_query_maximal_access(user_ns,
2832                                                             path.dentry,
2833                                                             &daccess);
2834                         if (rc)
2835                                 goto err_out;
2836                         already_permitted = true;
2837                 }
2838                 maximal_access = daccess;
2839         }
2840
2841         open_flags = smb2_create_open_flags(file_present, daccess,
2842                                             req->CreateDisposition,
2843                                             &may_flags);
2844
2845         if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
2846                 if (open_flags & O_CREAT) {
2847                         ksmbd_debug(SMB,
2848                                     "User does not have write permission\n");
2849                         rc = -EACCES;
2850                         goto err_out;
2851                 }
2852         }
2853
2854         /*create file if not present */
2855         if (!file_present) {
2856                 rc = smb2_creat(work, &path, name, open_flags, posix_mode,
2857                                 req->CreateOptions & FILE_DIRECTORY_FILE_LE);
2858                 if (rc) {
2859                         if (rc == -ENOENT) {
2860                                 rc = -EIO;
2861                                 rsp->hdr.Status = STATUS_OBJECT_PATH_NOT_FOUND;
2862                         }
2863                         goto err_out;
2864                 }
2865
2866                 created = true;
2867                 user_ns = mnt_user_ns(path.mnt);
2868                 if (ea_buf) {
2869                         if (le32_to_cpu(ea_buf->ccontext.DataLength) <
2870                             sizeof(struct smb2_ea_info)) {
2871                                 rc = -EINVAL;
2872                                 goto err_out;
2873                         }
2874
2875                         rc = smb2_set_ea(&ea_buf->ea,
2876                                          le32_to_cpu(ea_buf->ccontext.DataLength),
2877                                          &path);
2878                         if (rc == -EOPNOTSUPP)
2879                                 rc = 0;
2880                         else if (rc)
2881                                 goto err_out;
2882                 }
2883         } else if (!already_permitted) {
2884                 /* FILE_READ_ATTRIBUTE is allowed without inode_permission,
2885                  * because execute(search) permission on a parent directory,
2886                  * is already granted.
2887                  */
2888                 if (daccess & ~(FILE_READ_ATTRIBUTES_LE | FILE_READ_CONTROL_LE)) {
2889                         rc = inode_permission(user_ns,
2890                                               d_inode(path.dentry),
2891                                               may_flags);
2892                         if (rc)
2893                                 goto err_out;
2894
2895                         if ((daccess & FILE_DELETE_LE) ||
2896                             (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
2897                                 rc = ksmbd_vfs_may_delete(user_ns,
2898                                                           path.dentry);
2899                                 if (rc)
2900                                         goto err_out;
2901                         }
2902                 }
2903         }
2904
2905         rc = ksmbd_query_inode_status(d_inode(path.dentry->d_parent));
2906         if (rc == KSMBD_INODE_STATUS_PENDING_DELETE) {
2907                 rc = -EBUSY;
2908                 goto err_out;
2909         }
2910
2911         rc = 0;
2912         filp = dentry_open(&path, open_flags, current_cred());
2913         if (IS_ERR(filp)) {
2914                 rc = PTR_ERR(filp);
2915                 pr_err("dentry open for dir failed, rc %d\n", rc);
2916                 goto err_out;
2917         }
2918
2919         if (file_present) {
2920                 if (!(open_flags & O_TRUNC))
2921                         file_info = FILE_OPENED;
2922                 else
2923                         file_info = FILE_OVERWRITTEN;
2924
2925                 if ((req->CreateDisposition & FILE_CREATE_MASK_LE) ==
2926                     FILE_SUPERSEDE_LE)
2927                         file_info = FILE_SUPERSEDED;
2928         } else if (open_flags & O_CREAT) {
2929                 file_info = FILE_CREATED;
2930         }
2931
2932         ksmbd_vfs_set_fadvise(filp, req->CreateOptions);
2933
2934         /* Obtain Volatile-ID */
2935         fp = ksmbd_open_fd(work, filp);
2936         if (IS_ERR(fp)) {
2937                 fput(filp);
2938                 rc = PTR_ERR(fp);
2939                 fp = NULL;
2940                 goto err_out;
2941         }
2942
2943         /* Get Persistent-ID */
2944         ksmbd_open_durable_fd(fp);
2945         if (!has_file_id(fp->persistent_id)) {
2946                 rc = -ENOMEM;
2947                 goto err_out;
2948         }
2949
2950         fp->cdoption = req->CreateDisposition;
2951         fp->daccess = daccess;
2952         fp->saccess = req->ShareAccess;
2953         fp->coption = req->CreateOptions;
2954
2955         /* Set default windows and posix acls if creating new file */
2956         if (created) {
2957                 int posix_acl_rc;
2958                 struct inode *inode = d_inode(path.dentry);
2959
2960                 posix_acl_rc = ksmbd_vfs_inherit_posix_acl(user_ns,
2961                                                            path.dentry,
2962                                                            d_inode(path.dentry->d_parent));
2963                 if (posix_acl_rc)
2964                         ksmbd_debug(SMB, "inherit posix acl failed : %d\n", posix_acl_rc);
2965
2966                 if (test_share_config_flag(work->tcon->share_conf,
2967                                            KSMBD_SHARE_FLAG_ACL_XATTR)) {
2968                         rc = smb_inherit_dacl(conn, &path, sess->user->uid,
2969                                               sess->user->gid);
2970                 }
2971
2972                 if (rc) {
2973                         rc = smb2_create_sd_buffer(work, req, &path);
2974                         if (rc) {
2975                                 if (posix_acl_rc)
2976                                         ksmbd_vfs_set_init_posix_acl(user_ns,
2977                                                                      path.dentry);
2978
2979                                 if (test_share_config_flag(work->tcon->share_conf,
2980                                                            KSMBD_SHARE_FLAG_ACL_XATTR)) {
2981                                         struct smb_fattr fattr;
2982                                         struct smb_ntsd *pntsd;
2983                                         int pntsd_size, ace_num = 0;
2984
2985                                         ksmbd_acls_fattr(&fattr, user_ns, inode);
2986                                         if (fattr.cf_acls)
2987                                                 ace_num = fattr.cf_acls->a_count;
2988                                         if (fattr.cf_dacls)
2989                                                 ace_num += fattr.cf_dacls->a_count;
2990
2991                                         pntsd = kmalloc(sizeof(struct smb_ntsd) +
2992                                                         sizeof(struct smb_sid) * 3 +
2993                                                         sizeof(struct smb_acl) +
2994                                                         sizeof(struct smb_ace) * ace_num * 2,
2995                                                         GFP_KERNEL);
2996                                         if (!pntsd)
2997                                                 goto err_out;
2998
2999                                         rc = build_sec_desc(user_ns,
3000                                                             pntsd, NULL, 0,
3001                                                             OWNER_SECINFO |
3002                                                             GROUP_SECINFO |
3003                                                             DACL_SECINFO,
3004                                                             &pntsd_size, &fattr);
3005                                         posix_acl_release(fattr.cf_acls);
3006                                         posix_acl_release(fattr.cf_dacls);
3007                                         if (rc) {
3008                                                 kfree(pntsd);
3009                                                 goto err_out;
3010                                         }
3011
3012                                         rc = ksmbd_vfs_set_sd_xattr(conn,
3013                                                                     user_ns,
3014                                                                     path.dentry,
3015                                                                     pntsd,
3016                                                                     pntsd_size);
3017                                         kfree(pntsd);
3018                                         if (rc)
3019                                                 pr_err("failed to store ntacl in xattr : %d\n",
3020                                                        rc);
3021                                 }
3022                         }
3023                 }
3024                 rc = 0;
3025         }
3026
3027         if (stream_name) {
3028                 rc = smb2_set_stream_name_xattr(&path,
3029                                                 fp,
3030                                                 stream_name,
3031                                                 s_type);
3032                 if (rc)
3033                         goto err_out;
3034                 file_info = FILE_CREATED;
3035         }
3036
3037         fp->attrib_only = !(req->DesiredAccess & ~(FILE_READ_ATTRIBUTES_LE |
3038                         FILE_WRITE_ATTRIBUTES_LE | FILE_SYNCHRONIZE_LE));
3039         if (!S_ISDIR(file_inode(filp)->i_mode) && open_flags & O_TRUNC &&
3040             !fp->attrib_only && !stream_name) {
3041                 smb_break_all_oplock(work, fp);
3042                 need_truncate = 1;
3043         }
3044
3045         /* fp should be searchable through ksmbd_inode.m_fp_list
3046          * after daccess, saccess, attrib_only, and stream are
3047          * initialized.
3048          */
3049         write_lock(&fp->f_ci->m_lock);
3050         list_add(&fp->node, &fp->f_ci->m_fp_list);
3051         write_unlock(&fp->f_ci->m_lock);
3052
3053         /* Check delete pending among previous fp before oplock break */
3054         if (ksmbd_inode_pending_delete(fp)) {
3055                 rc = -EBUSY;
3056                 goto err_out;
3057         }
3058
3059         share_ret = ksmbd_smb_check_shared_mode(fp->filp, fp);
3060         if (!test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_OPLOCKS) ||
3061             (req_op_level == SMB2_OPLOCK_LEVEL_LEASE &&
3062              !(conn->vals->capabilities & SMB2_GLOBAL_CAP_LEASING))) {
3063                 if (share_ret < 0 && !S_ISDIR(file_inode(fp->filp)->i_mode)) {
3064                         rc = share_ret;
3065                         goto err_out;
3066                 }
3067         } else {
3068                 if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE) {
3069                         req_op_level = smb2_map_lease_to_oplock(lc->req_state);
3070                         ksmbd_debug(SMB,
3071                                     "lease req for(%s) req oplock state 0x%x, lease state 0x%x\n",
3072                                     name, req_op_level, lc->req_state);
3073                         rc = find_same_lease_key(sess, fp->f_ci, lc);
3074                         if (rc)
3075                                 goto err_out;
3076                 } else if (open_flags == O_RDONLY &&
3077                            (req_op_level == SMB2_OPLOCK_LEVEL_BATCH ||
3078                             req_op_level == SMB2_OPLOCK_LEVEL_EXCLUSIVE))
3079                         req_op_level = SMB2_OPLOCK_LEVEL_II;
3080
3081                 rc = smb_grant_oplock(work, req_op_level,
3082                                       fp->persistent_id, fp,
3083                                       le32_to_cpu(req->hdr.Id.SyncId.TreeId),
3084                                       lc, share_ret);
3085                 if (rc < 0)
3086                         goto err_out;
3087         }
3088
3089         if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)
3090                 ksmbd_fd_set_delete_on_close(fp, file_info);
3091
3092         if (need_truncate) {
3093                 rc = smb2_create_truncate(&path);
3094                 if (rc)
3095                         goto err_out;
3096         }
3097
3098         if (req->CreateContextsOffset) {
3099                 struct create_alloc_size_req *az_req;
3100
3101                 az_req = (struct create_alloc_size_req *)smb2_find_context_vals(req,
3102                                         SMB2_CREATE_ALLOCATION_SIZE);
3103                 if (IS_ERR(az_req)) {
3104                         rc = PTR_ERR(az_req);
3105                         goto err_out;
3106                 } else if (az_req) {
3107                         loff_t alloc_size;
3108                         int err;
3109
3110                         if (le16_to_cpu(az_req->ccontext.DataOffset) +
3111                             le32_to_cpu(az_req->ccontext.DataLength) <
3112                             sizeof(struct create_alloc_size_req)) {
3113                                 rc = -EINVAL;
3114                                 goto err_out;
3115                         }
3116                         alloc_size = le64_to_cpu(az_req->AllocationSize);
3117                         ksmbd_debug(SMB,
3118                                     "request smb2 create allocate size : %llu\n",
3119                                     alloc_size);
3120                         smb_break_all_levII_oplock(work, fp, 1);
3121                         err = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0,
3122                                             alloc_size);
3123                         if (err < 0)
3124                                 ksmbd_debug(SMB,
3125                                             "vfs_fallocate is failed : %d\n",
3126                                             err);
3127                 }
3128
3129                 context = smb2_find_context_vals(req, SMB2_CREATE_QUERY_ON_DISK_ID);
3130                 if (IS_ERR(context)) {
3131                         rc = PTR_ERR(context);
3132                         goto err_out;
3133                 } else if (context) {
3134                         ksmbd_debug(SMB, "get query on disk id context\n");
3135                         query_disk_id = 1;
3136                 }
3137         }
3138
3139         rc = ksmbd_vfs_getattr(&path, &stat);
3140         if (rc)
3141                 goto err_out;
3142
3143         if (stat.result_mask & STATX_BTIME)
3144                 fp->create_time = ksmbd_UnixTimeToNT(stat.btime);
3145         else
3146                 fp->create_time = ksmbd_UnixTimeToNT(stat.ctime);
3147         if (req->FileAttributes || fp->f_ci->m_fattr == 0)
3148                 fp->f_ci->m_fattr =
3149                         cpu_to_le32(smb2_get_dos_mode(&stat, le32_to_cpu(req->FileAttributes)));
3150
3151         if (!created)
3152                 smb2_update_xattrs(tcon, &path, fp);
3153         else
3154                 smb2_new_xattrs(tcon, &path, fp);
3155
3156         memcpy(fp->client_guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE);
3157
3158         rsp->StructureSize = cpu_to_le16(89);
3159         rcu_read_lock();
3160         opinfo = rcu_dereference(fp->f_opinfo);
3161         rsp->OplockLevel = opinfo != NULL ? opinfo->level : 0;
3162         rcu_read_unlock();
3163         rsp->Flags = 0;
3164         rsp->CreateAction = cpu_to_le32(file_info);
3165         rsp->CreationTime = cpu_to_le64(fp->create_time);
3166         time = ksmbd_UnixTimeToNT(stat.atime);
3167         rsp->LastAccessTime = cpu_to_le64(time);
3168         time = ksmbd_UnixTimeToNT(stat.mtime);
3169         rsp->LastWriteTime = cpu_to_le64(time);
3170         time = ksmbd_UnixTimeToNT(stat.ctime);
3171         rsp->ChangeTime = cpu_to_le64(time);
3172         rsp->AllocationSize = S_ISDIR(stat.mode) ? 0 :
3173                 cpu_to_le64(stat.blocks << 9);
3174         rsp->EndofFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
3175         rsp->FileAttributes = fp->f_ci->m_fattr;
3176
3177         rsp->Reserved2 = 0;
3178
3179         rsp->PersistentFileId = fp->persistent_id;
3180         rsp->VolatileFileId = fp->volatile_id;
3181
3182         rsp->CreateContextsOffset = 0;
3183         rsp->CreateContextsLength = 0;
3184         inc_rfc1001_len(work->response_buf, 88); /* StructureSize - 1*/
3185
3186         /* If lease is request send lease context response */
3187         if (opinfo && opinfo->is_lease) {
3188                 struct create_context *lease_ccontext;
3189
3190                 ksmbd_debug(SMB, "lease granted on(%s) lease state 0x%x\n",
3191                             name, opinfo->o_lease->state);
3192                 rsp->OplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
3193
3194                 lease_ccontext = (struct create_context *)rsp->Buffer;
3195                 contxt_cnt++;
3196                 create_lease_buf(rsp->Buffer, opinfo->o_lease);
3197                 le32_add_cpu(&rsp->CreateContextsLength,
3198                              conn->vals->create_lease_size);
3199                 inc_rfc1001_len(work->response_buf,
3200                                 conn->vals->create_lease_size);
3201                 next_ptr = &lease_ccontext->Next;
3202                 next_off = conn->vals->create_lease_size;
3203         }
3204
3205         if (maximal_access_ctxt) {
3206                 struct create_context *mxac_ccontext;
3207
3208                 if (maximal_access == 0)
3209                         ksmbd_vfs_query_maximal_access(user_ns,
3210                                                        path.dentry,
3211                                                        &maximal_access);
3212                 mxac_ccontext = (struct create_context *)(rsp->Buffer +
3213                                 le32_to_cpu(rsp->CreateContextsLength));
3214                 contxt_cnt++;
3215                 create_mxac_rsp_buf(rsp->Buffer +
3216                                 le32_to_cpu(rsp->CreateContextsLength),
3217                                 le32_to_cpu(maximal_access));
3218                 le32_add_cpu(&rsp->CreateContextsLength,
3219                              conn->vals->create_mxac_size);
3220                 inc_rfc1001_len(work->response_buf,
3221                                 conn->vals->create_mxac_size);
3222                 if (next_ptr)
3223                         *next_ptr = cpu_to_le32(next_off);
3224                 next_ptr = &mxac_ccontext->Next;
3225                 next_off = conn->vals->create_mxac_size;
3226         }
3227
3228         if (query_disk_id) {
3229                 struct create_context *disk_id_ccontext;
3230
3231                 disk_id_ccontext = (struct create_context *)(rsp->Buffer +
3232                                 le32_to_cpu(rsp->CreateContextsLength));
3233                 contxt_cnt++;
3234                 create_disk_id_rsp_buf(rsp->Buffer +
3235                                 le32_to_cpu(rsp->CreateContextsLength),
3236                                 stat.ino, tcon->id);
3237                 le32_add_cpu(&rsp->CreateContextsLength,
3238                              conn->vals->create_disk_id_size);
3239                 inc_rfc1001_len(work->response_buf,
3240                                 conn->vals->create_disk_id_size);
3241                 if (next_ptr)
3242                         *next_ptr = cpu_to_le32(next_off);
3243                 next_ptr = &disk_id_ccontext->Next;
3244                 next_off = conn->vals->create_disk_id_size;
3245         }
3246
3247         if (posix_ctxt) {
3248                 contxt_cnt++;
3249                 create_posix_rsp_buf(rsp->Buffer +
3250                                 le32_to_cpu(rsp->CreateContextsLength),
3251                                 fp);
3252                 le32_add_cpu(&rsp->CreateContextsLength,
3253                              conn->vals->create_posix_size);
3254                 inc_rfc1001_len(work->response_buf,
3255                                 conn->vals->create_posix_size);
3256                 if (next_ptr)
3257                         *next_ptr = cpu_to_le32(next_off);
3258         }
3259
3260         if (contxt_cnt > 0) {
3261                 rsp->CreateContextsOffset =
3262                         cpu_to_le32(offsetof(struct smb2_create_rsp, Buffer));
3263         }
3264
3265 err_out:
3266         if (file_present || created)
3267                 path_put(&path);
3268         ksmbd_revert_fsids(work);
3269 err_out1:
3270         if (rc) {
3271                 if (rc == -EINVAL)
3272                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
3273                 else if (rc == -EOPNOTSUPP)
3274                         rsp->hdr.Status = STATUS_NOT_SUPPORTED;
3275                 else if (rc == -EACCES || rc == -ESTALE || rc == -EXDEV)
3276                         rsp->hdr.Status = STATUS_ACCESS_DENIED;
3277                 else if (rc == -ENOENT)
3278                         rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID;
3279                 else if (rc == -EPERM)
3280                         rsp->hdr.Status = STATUS_SHARING_VIOLATION;
3281                 else if (rc == -EBUSY)
3282                         rsp->hdr.Status = STATUS_DELETE_PENDING;
3283                 else if (rc == -EBADF)
3284                         rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
3285                 else if (rc == -ENOEXEC)
3286                         rsp->hdr.Status = STATUS_DUPLICATE_OBJECTID;
3287                 else if (rc == -ENXIO)
3288                         rsp->hdr.Status = STATUS_NO_SUCH_DEVICE;
3289                 else if (rc == -EEXIST)
3290                         rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION;
3291                 else if (rc == -EMFILE)
3292                         rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
3293                 if (!rsp->hdr.Status)
3294                         rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
3295
3296                 if (fp)
3297                         ksmbd_fd_put(work, fp);
3298                 smb2_set_err_rsp(work);
3299                 ksmbd_debug(SMB, "Error response: %x\n", rsp->hdr.Status);
3300         }
3301
3302         kfree(name);
3303         kfree(lc);
3304
3305         return 0;
3306 }
3307
3308 static int readdir_info_level_struct_sz(int info_level)
3309 {
3310         switch (info_level) {
3311         case FILE_FULL_DIRECTORY_INFORMATION:
3312                 return sizeof(struct file_full_directory_info);
3313         case FILE_BOTH_DIRECTORY_INFORMATION:
3314                 return sizeof(struct file_both_directory_info);
3315         case FILE_DIRECTORY_INFORMATION:
3316                 return sizeof(struct file_directory_info);
3317         case FILE_NAMES_INFORMATION:
3318                 return sizeof(struct file_names_info);
3319         case FILEID_FULL_DIRECTORY_INFORMATION:
3320                 return sizeof(struct file_id_full_dir_info);
3321         case FILEID_BOTH_DIRECTORY_INFORMATION:
3322                 return sizeof(struct file_id_both_directory_info);
3323         case SMB_FIND_FILE_POSIX_INFO:
3324                 return sizeof(struct smb2_posix_info);
3325         default:
3326                 return -EOPNOTSUPP;
3327         }
3328 }
3329
3330 static int dentry_name(struct ksmbd_dir_info *d_info, int info_level)
3331 {
3332         switch (info_level) {
3333         case FILE_FULL_DIRECTORY_INFORMATION:
3334         {
3335                 struct file_full_directory_info *ffdinfo;
3336
3337                 ffdinfo = (struct file_full_directory_info *)d_info->rptr;
3338                 d_info->rptr += le32_to_cpu(ffdinfo->NextEntryOffset);
3339                 d_info->name = ffdinfo->FileName;
3340                 d_info->name_len = le32_to_cpu(ffdinfo->FileNameLength);
3341                 return 0;
3342         }
3343         case FILE_BOTH_DIRECTORY_INFORMATION:
3344         {
3345                 struct file_both_directory_info *fbdinfo;
3346
3347                 fbdinfo = (struct file_both_directory_info *)d_info->rptr;
3348                 d_info->rptr += le32_to_cpu(fbdinfo->NextEntryOffset);
3349                 d_info->name = fbdinfo->FileName;
3350                 d_info->name_len = le32_to_cpu(fbdinfo->FileNameLength);
3351                 return 0;
3352         }
3353         case FILE_DIRECTORY_INFORMATION:
3354         {
3355                 struct file_directory_info *fdinfo;
3356
3357                 fdinfo = (struct file_directory_info *)d_info->rptr;
3358                 d_info->rptr += le32_to_cpu(fdinfo->NextEntryOffset);
3359                 d_info->name = fdinfo->FileName;
3360                 d_info->name_len = le32_to_cpu(fdinfo->FileNameLength);
3361                 return 0;
3362         }
3363         case FILE_NAMES_INFORMATION:
3364         {
3365                 struct file_names_info *fninfo;
3366
3367                 fninfo = (struct file_names_info *)d_info->rptr;
3368                 d_info->rptr += le32_to_cpu(fninfo->NextEntryOffset);
3369                 d_info->name = fninfo->FileName;
3370                 d_info->name_len = le32_to_cpu(fninfo->FileNameLength);
3371                 return 0;
3372         }
3373         case FILEID_FULL_DIRECTORY_INFORMATION:
3374         {
3375                 struct file_id_full_dir_info *dinfo;
3376
3377                 dinfo = (struct file_id_full_dir_info *)d_info->rptr;
3378                 d_info->rptr += le32_to_cpu(dinfo->NextEntryOffset);
3379                 d_info->name = dinfo->FileName;
3380                 d_info->name_len = le32_to_cpu(dinfo->FileNameLength);
3381                 return 0;
3382         }
3383         case FILEID_BOTH_DIRECTORY_INFORMATION:
3384         {
3385                 struct file_id_both_directory_info *fibdinfo;
3386
3387                 fibdinfo = (struct file_id_both_directory_info *)d_info->rptr;
3388                 d_info->rptr += le32_to_cpu(fibdinfo->NextEntryOffset);
3389                 d_info->name = fibdinfo->FileName;
3390                 d_info->name_len = le32_to_cpu(fibdinfo->FileNameLength);
3391                 return 0;
3392         }
3393         case SMB_FIND_FILE_POSIX_INFO:
3394         {
3395                 struct smb2_posix_info *posix_info;
3396
3397                 posix_info = (struct smb2_posix_info *)d_info->rptr;
3398                 d_info->rptr += le32_to_cpu(posix_info->NextEntryOffset);
3399                 d_info->name = posix_info->name;
3400                 d_info->name_len = le32_to_cpu(posix_info->name_len);
3401                 return 0;
3402         }
3403         default:
3404                 return -EINVAL;
3405         }
3406 }
3407
3408 /**
3409  * smb2_populate_readdir_entry() - encode directory entry in smb2 response
3410  * buffer
3411  * @conn:       connection instance
3412  * @info_level: smb information level
3413  * @d_info:     structure included variables for query dir
3414  * @ksmbd_kstat:        ksmbd wrapper of dirent stat information
3415  *
3416  * if directory has many entries, find first can't read it fully.
3417  * find next might be called multiple times to read remaining dir entries
3418  *
3419  * Return:      0 on success, otherwise error
3420  */
3421 static int smb2_populate_readdir_entry(struct ksmbd_conn *conn, int info_level,
3422                                        struct ksmbd_dir_info *d_info,
3423                                        struct ksmbd_kstat *ksmbd_kstat)
3424 {
3425         int next_entry_offset = 0;
3426         char *conv_name;
3427         int conv_len;
3428         void *kstat;
3429         int struct_sz, rc = 0;
3430
3431         conv_name = ksmbd_convert_dir_info_name(d_info,
3432                                                 conn->local_nls,
3433                                                 &conv_len);
3434         if (!conv_name)
3435                 return -ENOMEM;
3436
3437         /* Somehow the name has only terminating NULL bytes */
3438         if (conv_len < 0) {
3439                 rc = -EINVAL;
3440                 goto free_conv_name;
3441         }
3442
3443         struct_sz = readdir_info_level_struct_sz(info_level) + conv_len;
3444         next_entry_offset = ALIGN(struct_sz, KSMBD_DIR_INFO_ALIGNMENT);
3445         d_info->last_entry_off_align = next_entry_offset - struct_sz;
3446
3447         if (next_entry_offset > d_info->out_buf_len) {
3448                 d_info->out_buf_len = 0;
3449                 rc = -ENOSPC;
3450                 goto free_conv_name;
3451         }
3452
3453         kstat = d_info->wptr;
3454         if (info_level != FILE_NAMES_INFORMATION)
3455                 kstat = ksmbd_vfs_init_kstat(&d_info->wptr, ksmbd_kstat);
3456
3457         switch (info_level) {
3458         case FILE_FULL_DIRECTORY_INFORMATION:
3459         {
3460                 struct file_full_directory_info *ffdinfo;
3461
3462                 ffdinfo = (struct file_full_directory_info *)kstat;
3463                 ffdinfo->FileNameLength = cpu_to_le32(conv_len);
3464                 ffdinfo->EaSize =
3465                         smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3466                 if (ffdinfo->EaSize)
3467                         ffdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3468                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3469                         ffdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3470                 memcpy(ffdinfo->FileName, conv_name, conv_len);
3471                 ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3472                 break;
3473         }
3474         case FILE_BOTH_DIRECTORY_INFORMATION:
3475         {
3476                 struct file_both_directory_info *fbdinfo;
3477
3478                 fbdinfo = (struct file_both_directory_info *)kstat;
3479                 fbdinfo->FileNameLength = cpu_to_le32(conv_len);
3480                 fbdinfo->EaSize =
3481                         smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3482                 if (fbdinfo->EaSize)
3483                         fbdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3484                 fbdinfo->ShortNameLength = 0;
3485                 fbdinfo->Reserved = 0;
3486                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3487                         fbdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3488                 memcpy(fbdinfo->FileName, conv_name, conv_len);
3489                 fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3490                 break;
3491         }
3492         case FILE_DIRECTORY_INFORMATION:
3493         {
3494                 struct file_directory_info *fdinfo;
3495
3496                 fdinfo = (struct file_directory_info *)kstat;
3497                 fdinfo->FileNameLength = cpu_to_le32(conv_len);
3498                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3499                         fdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3500                 memcpy(fdinfo->FileName, conv_name, conv_len);
3501                 fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3502                 break;
3503         }
3504         case FILE_NAMES_INFORMATION:
3505         {
3506                 struct file_names_info *fninfo;
3507
3508                 fninfo = (struct file_names_info *)kstat;
3509                 fninfo->FileNameLength = cpu_to_le32(conv_len);
3510                 memcpy(fninfo->FileName, conv_name, conv_len);
3511                 fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3512                 break;
3513         }
3514         case FILEID_FULL_DIRECTORY_INFORMATION:
3515         {
3516                 struct file_id_full_dir_info *dinfo;
3517
3518                 dinfo = (struct file_id_full_dir_info *)kstat;
3519                 dinfo->FileNameLength = cpu_to_le32(conv_len);
3520                 dinfo->EaSize =
3521                         smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3522                 if (dinfo->EaSize)
3523                         dinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3524                 dinfo->Reserved = 0;
3525                 dinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino);
3526                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3527                         dinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3528                 memcpy(dinfo->FileName, conv_name, conv_len);
3529                 dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3530                 break;
3531         }
3532         case FILEID_BOTH_DIRECTORY_INFORMATION:
3533         {
3534                 struct file_id_both_directory_info *fibdinfo;
3535
3536                 fibdinfo = (struct file_id_both_directory_info *)kstat;
3537                 fibdinfo->FileNameLength = cpu_to_le32(conv_len);
3538                 fibdinfo->EaSize =
3539                         smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3540                 if (fibdinfo->EaSize)
3541                         fibdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3542                 fibdinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino);
3543                 fibdinfo->ShortNameLength = 0;
3544                 fibdinfo->Reserved = 0;
3545                 fibdinfo->Reserved2 = cpu_to_le16(0);
3546                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3547                         fibdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3548                 memcpy(fibdinfo->FileName, conv_name, conv_len);
3549                 fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3550                 break;
3551         }
3552         case SMB_FIND_FILE_POSIX_INFO:
3553         {
3554                 struct smb2_posix_info *posix_info;
3555                 u64 time;
3556
3557                 posix_info = (struct smb2_posix_info *)kstat;
3558                 posix_info->Ignored = 0;
3559                 posix_info->CreationTime = cpu_to_le64(ksmbd_kstat->create_time);
3560                 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->ctime);
3561                 posix_info->ChangeTime = cpu_to_le64(time);
3562                 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->atime);
3563                 posix_info->LastAccessTime = cpu_to_le64(time);
3564                 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->mtime);
3565                 posix_info->LastWriteTime = cpu_to_le64(time);
3566                 posix_info->EndOfFile = cpu_to_le64(ksmbd_kstat->kstat->size);
3567                 posix_info->AllocationSize = cpu_to_le64(ksmbd_kstat->kstat->blocks << 9);
3568                 posix_info->DeviceId = cpu_to_le32(ksmbd_kstat->kstat->rdev);
3569                 posix_info->HardLinks = cpu_to_le32(ksmbd_kstat->kstat->nlink);
3570                 posix_info->Mode = cpu_to_le32(ksmbd_kstat->kstat->mode & 0777);
3571                 posix_info->Inode = cpu_to_le64(ksmbd_kstat->kstat->ino);
3572                 posix_info->DosAttributes =
3573                         S_ISDIR(ksmbd_kstat->kstat->mode) ?
3574                                 FILE_ATTRIBUTE_DIRECTORY_LE : FILE_ATTRIBUTE_ARCHIVE_LE;
3575                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3576                         posix_info->DosAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3577                 /*
3578                  * SidBuffer(32) contain two sids(Domain sid(16), UNIX group sid(16)).
3579                  * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) +
3580                  *                sub_auth(4 * 1(num_subauth)) + RID(4).
3581                  */
3582                 id_to_sid(from_kuid_munged(&init_user_ns, ksmbd_kstat->kstat->uid),
3583                           SIDUNIX_USER, (struct smb_sid *)&posix_info->SidBuffer[0]);
3584                 id_to_sid(from_kgid_munged(&init_user_ns, ksmbd_kstat->kstat->gid),
3585                           SIDUNIX_GROUP, (struct smb_sid *)&posix_info->SidBuffer[16]);
3586                 memcpy(posix_info->name, conv_name, conv_len);
3587                 posix_info->name_len = cpu_to_le32(conv_len);
3588                 posix_info->NextEntryOffset = cpu_to_le32(next_entry_offset);
3589                 break;
3590         }
3591
3592         } /* switch (info_level) */
3593
3594         d_info->last_entry_offset = d_info->data_count;
3595         d_info->data_count += next_entry_offset;
3596         d_info->out_buf_len -= next_entry_offset;
3597         d_info->wptr += next_entry_offset;
3598
3599         ksmbd_debug(SMB,
3600                     "info_level : %d, buf_len :%d, next_offset : %d, data_count : %d\n",
3601                     info_level, d_info->out_buf_len,
3602                     next_entry_offset, d_info->data_count);
3603
3604 free_conv_name:
3605         kfree(conv_name);
3606         return rc;
3607 }
3608
3609 struct smb2_query_dir_private {
3610         struct ksmbd_work       *work;
3611         char                    *search_pattern;
3612         struct ksmbd_file       *dir_fp;
3613
3614         struct ksmbd_dir_info   *d_info;
3615         int                     info_level;
3616 };
3617
3618 static void lock_dir(struct ksmbd_file *dir_fp)
3619 {
3620         struct dentry *dir = dir_fp->filp->f_path.dentry;
3621
3622         inode_lock_nested(d_inode(dir), I_MUTEX_PARENT);
3623 }
3624
3625 static void unlock_dir(struct ksmbd_file *dir_fp)
3626 {
3627         struct dentry *dir = dir_fp->filp->f_path.dentry;
3628
3629         inode_unlock(d_inode(dir));
3630 }
3631
3632 static int process_query_dir_entries(struct smb2_query_dir_private *priv)
3633 {
3634         struct user_namespace   *user_ns = file_mnt_user_ns(priv->dir_fp->filp);
3635         struct kstat            kstat;
3636         struct ksmbd_kstat      ksmbd_kstat;
3637         int                     rc;
3638         int                     i;
3639
3640         for (i = 0; i < priv->d_info->num_entry; i++) {
3641                 struct dentry *dent;
3642
3643                 if (dentry_name(priv->d_info, priv->info_level))
3644                         return -EINVAL;
3645
3646                 lock_dir(priv->dir_fp);
3647                 dent = lookup_one(user_ns, priv->d_info->name,
3648                                   priv->dir_fp->filp->f_path.dentry,
3649                                   priv->d_info->name_len);
3650                 unlock_dir(priv->dir_fp);
3651
3652                 if (IS_ERR(dent)) {
3653                         ksmbd_debug(SMB, "Cannot lookup `%s' [%ld]\n",
3654                                     priv->d_info->name,
3655                                     PTR_ERR(dent));
3656                         continue;
3657                 }
3658                 if (unlikely(d_is_negative(dent))) {
3659                         dput(dent);
3660                         ksmbd_debug(SMB, "Negative dentry `%s'\n",
3661                                     priv->d_info->name);
3662                         continue;
3663                 }
3664
3665                 ksmbd_kstat.kstat = &kstat;
3666                 if (priv->info_level != FILE_NAMES_INFORMATION)
3667                         ksmbd_vfs_fill_dentry_attrs(priv->work,
3668                                                     user_ns,
3669                                                     dent,
3670                                                     &ksmbd_kstat);
3671
3672                 rc = smb2_populate_readdir_entry(priv->work->conn,
3673                                                  priv->info_level,
3674                                                  priv->d_info,
3675                                                  &ksmbd_kstat);
3676                 dput(dent);
3677                 if (rc)
3678                         return rc;
3679         }
3680         return 0;
3681 }
3682
3683 static int reserve_populate_dentry(struct ksmbd_dir_info *d_info,
3684                                    int info_level)
3685 {
3686         int struct_sz;
3687         int conv_len;
3688         int next_entry_offset;
3689
3690         struct_sz = readdir_info_level_struct_sz(info_level);
3691         if (struct_sz == -EOPNOTSUPP)
3692                 return -EOPNOTSUPP;
3693
3694         conv_len = (d_info->name_len + 1) * 2;
3695         next_entry_offset = ALIGN(struct_sz + conv_len,
3696                                   KSMBD_DIR_INFO_ALIGNMENT);
3697
3698         if (next_entry_offset > d_info->out_buf_len) {
3699                 d_info->out_buf_len = 0;
3700                 return -ENOSPC;
3701         }
3702
3703         switch (info_level) {
3704         case FILE_FULL_DIRECTORY_INFORMATION:
3705         {
3706                 struct file_full_directory_info *ffdinfo;
3707
3708                 ffdinfo = (struct file_full_directory_info *)d_info->wptr;
3709                 memcpy(ffdinfo->FileName, d_info->name, d_info->name_len);
3710                 ffdinfo->FileName[d_info->name_len] = 0x00;
3711                 ffdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3712                 ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3713                 break;
3714         }
3715         case FILE_BOTH_DIRECTORY_INFORMATION:
3716         {
3717                 struct file_both_directory_info *fbdinfo;
3718
3719                 fbdinfo = (struct file_both_directory_info *)d_info->wptr;
3720                 memcpy(fbdinfo->FileName, d_info->name, d_info->name_len);
3721                 fbdinfo->FileName[d_info->name_len] = 0x00;
3722                 fbdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3723                 fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3724                 break;
3725         }
3726         case FILE_DIRECTORY_INFORMATION:
3727         {
3728                 struct file_directory_info *fdinfo;
3729
3730                 fdinfo = (struct file_directory_info *)d_info->wptr;
3731                 memcpy(fdinfo->FileName, d_info->name, d_info->name_len);
3732                 fdinfo->FileName[d_info->name_len] = 0x00;
3733                 fdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3734                 fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3735                 break;
3736         }
3737         case FILE_NAMES_INFORMATION:
3738         {
3739                 struct file_names_info *fninfo;
3740
3741                 fninfo = (struct file_names_info *)d_info->wptr;
3742                 memcpy(fninfo->FileName, d_info->name, d_info->name_len);
3743                 fninfo->FileName[d_info->name_len] = 0x00;
3744                 fninfo->FileNameLength = cpu_to_le32(d_info->name_len);
3745                 fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3746                 break;
3747         }
3748         case FILEID_FULL_DIRECTORY_INFORMATION:
3749         {
3750                 struct file_id_full_dir_info *dinfo;
3751
3752                 dinfo = (struct file_id_full_dir_info *)d_info->wptr;
3753                 memcpy(dinfo->FileName, d_info->name, d_info->name_len);
3754                 dinfo->FileName[d_info->name_len] = 0x00;
3755                 dinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3756                 dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3757                 break;
3758         }
3759         case FILEID_BOTH_DIRECTORY_INFORMATION:
3760         {
3761                 struct file_id_both_directory_info *fibdinfo;
3762
3763                 fibdinfo = (struct file_id_both_directory_info *)d_info->wptr;
3764                 memcpy(fibdinfo->FileName, d_info->name, d_info->name_len);
3765                 fibdinfo->FileName[d_info->name_len] = 0x00;
3766                 fibdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3767                 fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3768                 break;
3769         }
3770         case SMB_FIND_FILE_POSIX_INFO:
3771         {
3772                 struct smb2_posix_info *posix_info;
3773
3774                 posix_info = (struct smb2_posix_info *)d_info->wptr;
3775                 memcpy(posix_info->name, d_info->name, d_info->name_len);
3776                 posix_info->name[d_info->name_len] = 0x00;
3777                 posix_info->name_len = cpu_to_le32(d_info->name_len);
3778                 posix_info->NextEntryOffset =
3779                         cpu_to_le32(next_entry_offset);
3780                 break;
3781         }
3782         } /* switch (info_level) */
3783
3784         d_info->num_entry++;
3785         d_info->out_buf_len -= next_entry_offset;
3786         d_info->wptr += next_entry_offset;
3787         return 0;
3788 }
3789
3790 static bool __query_dir(struct dir_context *ctx, const char *name, int namlen,
3791                        loff_t offset, u64 ino, unsigned int d_type)
3792 {
3793         struct ksmbd_readdir_data       *buf;
3794         struct smb2_query_dir_private   *priv;
3795         struct ksmbd_dir_info           *d_info;
3796         int                             rc;
3797
3798         buf     = container_of(ctx, struct ksmbd_readdir_data, ctx);
3799         priv    = buf->private;
3800         d_info  = priv->d_info;
3801
3802         /* dot and dotdot entries are already reserved */
3803         if (!strcmp(".", name) || !strcmp("..", name))
3804                 return true;
3805         if (ksmbd_share_veto_filename(priv->work->tcon->share_conf, name))
3806                 return true;
3807         if (!match_pattern(name, namlen, priv->search_pattern))
3808                 return true;
3809
3810         d_info->name            = name;
3811         d_info->name_len        = namlen;
3812         rc = reserve_populate_dentry(d_info, priv->info_level);
3813         if (rc)
3814                 return false;
3815         if (d_info->flags & SMB2_RETURN_SINGLE_ENTRY)
3816                 d_info->out_buf_len = 0;
3817         return true;
3818 }
3819
3820 static int verify_info_level(int info_level)
3821 {
3822         switch (info_level) {
3823         case FILE_FULL_DIRECTORY_INFORMATION:
3824         case FILE_BOTH_DIRECTORY_INFORMATION:
3825         case FILE_DIRECTORY_INFORMATION:
3826         case FILE_NAMES_INFORMATION:
3827         case FILEID_FULL_DIRECTORY_INFORMATION:
3828         case FILEID_BOTH_DIRECTORY_INFORMATION:
3829         case SMB_FIND_FILE_POSIX_INFO:
3830                 break;
3831         default:
3832                 return -EOPNOTSUPP;
3833         }
3834
3835         return 0;
3836 }
3837
3838 static int smb2_resp_buf_len(struct ksmbd_work *work, unsigned short hdr2_len)
3839 {
3840         int free_len;
3841
3842         free_len = (int)(work->response_sz -
3843                 (get_rfc1002_len(work->response_buf) + 4)) - hdr2_len;
3844         return free_len;
3845 }
3846
3847 static int smb2_calc_max_out_buf_len(struct ksmbd_work *work,
3848                                      unsigned short hdr2_len,
3849                                      unsigned int out_buf_len)
3850 {
3851         int free_len;
3852
3853         if (out_buf_len > work->conn->vals->max_trans_size)
3854                 return -EINVAL;
3855
3856         free_len = smb2_resp_buf_len(work, hdr2_len);
3857         if (free_len < 0)
3858                 return -EINVAL;
3859
3860         return min_t(int, out_buf_len, free_len);
3861 }
3862
3863 int smb2_query_dir(struct ksmbd_work *work)
3864 {
3865         struct ksmbd_conn *conn = work->conn;
3866         struct smb2_query_directory_req *req;
3867         struct smb2_query_directory_rsp *rsp;
3868         struct ksmbd_share_config *share = work->tcon->share_conf;
3869         struct ksmbd_file *dir_fp = NULL;
3870         struct ksmbd_dir_info d_info;
3871         int rc = 0;
3872         char *srch_ptr = NULL;
3873         unsigned char srch_flag;
3874         int buffer_sz;
3875         struct smb2_query_dir_private query_dir_private = {NULL, };
3876
3877         WORK_BUFFERS(work, req, rsp);
3878
3879         if (ksmbd_override_fsids(work)) {
3880                 rsp->hdr.Status = STATUS_NO_MEMORY;
3881                 smb2_set_err_rsp(work);
3882                 return -ENOMEM;
3883         }
3884
3885         rc = verify_info_level(req->FileInformationClass);
3886         if (rc) {
3887                 rc = -EFAULT;
3888                 goto err_out2;
3889         }
3890
3891         dir_fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
3892         if (!dir_fp) {
3893                 rc = -EBADF;
3894                 goto err_out2;
3895         }
3896
3897         if (!(dir_fp->daccess & FILE_LIST_DIRECTORY_LE) ||
3898             inode_permission(file_mnt_user_ns(dir_fp->filp),
3899                              file_inode(dir_fp->filp),
3900                              MAY_READ | MAY_EXEC)) {
3901                 pr_err("no right to enumerate directory (%pD)\n", dir_fp->filp);
3902                 rc = -EACCES;
3903                 goto err_out2;
3904         }
3905
3906         if (!S_ISDIR(file_inode(dir_fp->filp)->i_mode)) {
3907                 pr_err("can't do query dir for a file\n");
3908                 rc = -EINVAL;
3909                 goto err_out2;
3910         }
3911
3912         srch_flag = req->Flags;
3913         srch_ptr = smb_strndup_from_utf16(req->Buffer,
3914                                           le16_to_cpu(req->FileNameLength), 1,
3915                                           conn->local_nls);
3916         if (IS_ERR(srch_ptr)) {
3917                 ksmbd_debug(SMB, "Search Pattern not found\n");
3918                 rc = -EINVAL;
3919                 goto err_out2;
3920         } else {
3921                 ksmbd_debug(SMB, "Search pattern is %s\n", srch_ptr);
3922         }
3923
3924         if (srch_flag & SMB2_REOPEN || srch_flag & SMB2_RESTART_SCANS) {
3925                 ksmbd_debug(SMB, "Restart directory scan\n");
3926                 generic_file_llseek(dir_fp->filp, 0, SEEK_SET);
3927         }
3928
3929         memset(&d_info, 0, sizeof(struct ksmbd_dir_info));
3930         d_info.wptr = (char *)rsp->Buffer;
3931         d_info.rptr = (char *)rsp->Buffer;
3932         d_info.out_buf_len =
3933                 smb2_calc_max_out_buf_len(work, 8,
3934                                           le32_to_cpu(req->OutputBufferLength));
3935         if (d_info.out_buf_len < 0) {
3936                 rc = -EINVAL;
3937                 goto err_out;
3938         }
3939         d_info.flags = srch_flag;
3940
3941         /*
3942          * reserve dot and dotdot entries in head of buffer
3943          * in first response
3944          */
3945         rc = ksmbd_populate_dot_dotdot_entries(work, req->FileInformationClass,
3946                                                dir_fp, &d_info, srch_ptr,
3947                                                smb2_populate_readdir_entry);
3948         if (rc == -ENOSPC)
3949                 rc = 0;
3950         else if (rc)
3951                 goto err_out;
3952
3953         if (test_share_config_flag(share, KSMBD_SHARE_FLAG_HIDE_DOT_FILES))
3954                 d_info.hide_dot_file = true;
3955
3956         buffer_sz                               = d_info.out_buf_len;
3957         d_info.rptr                             = d_info.wptr;
3958         query_dir_private.work                  = work;
3959         query_dir_private.search_pattern        = srch_ptr;
3960         query_dir_private.dir_fp                = dir_fp;
3961         query_dir_private.d_info                = &d_info;
3962         query_dir_private.info_level            = req->FileInformationClass;
3963         dir_fp->readdir_data.private            = &query_dir_private;
3964         set_ctx_actor(&dir_fp->readdir_data.ctx, __query_dir);
3965
3966         rc = iterate_dir(dir_fp->filp, &dir_fp->readdir_data.ctx);
3967         /*
3968          * req->OutputBufferLength is too small to contain even one entry.
3969          * In this case, it immediately returns OutputBufferLength 0 to client.
3970          */
3971         if (!d_info.out_buf_len && !d_info.num_entry)
3972                 goto no_buf_len;
3973         if (rc > 0 || rc == -ENOSPC)
3974                 rc = 0;
3975         else if (rc)
3976                 goto err_out;
3977
3978         d_info.wptr = d_info.rptr;
3979         d_info.out_buf_len = buffer_sz;
3980         rc = process_query_dir_entries(&query_dir_private);
3981         if (rc)
3982                 goto err_out;
3983
3984         if (!d_info.data_count && d_info.out_buf_len >= 0) {
3985                 if (srch_flag & SMB2_RETURN_SINGLE_ENTRY && !is_asterisk(srch_ptr)) {
3986                         rsp->hdr.Status = STATUS_NO_SUCH_FILE;
3987                 } else {
3988                         dir_fp->dot_dotdot[0] = dir_fp->dot_dotdot[1] = 0;
3989                         rsp->hdr.Status = STATUS_NO_MORE_FILES;
3990                 }
3991                 rsp->StructureSize = cpu_to_le16(9);
3992                 rsp->OutputBufferOffset = cpu_to_le16(0);
3993                 rsp->OutputBufferLength = cpu_to_le32(0);
3994                 rsp->Buffer[0] = 0;
3995                 inc_rfc1001_len(work->response_buf, 9);
3996         } else {
3997 no_buf_len:
3998                 ((struct file_directory_info *)
3999                 ((char *)rsp->Buffer + d_info.last_entry_offset))
4000                 ->NextEntryOffset = 0;
4001                 if (d_info.data_count >= d_info.last_entry_off_align)
4002                         d_info.data_count -= d_info.last_entry_off_align;
4003
4004                 rsp->StructureSize = cpu_to_le16(9);
4005                 rsp->OutputBufferOffset = cpu_to_le16(72);
4006                 rsp->OutputBufferLength = cpu_to_le32(d_info.data_count);
4007                 inc_rfc1001_len(work->response_buf, 8 + d_info.data_count);
4008         }
4009
4010         kfree(srch_ptr);
4011         ksmbd_fd_put(work, dir_fp);
4012         ksmbd_revert_fsids(work);
4013         return 0;
4014
4015 err_out:
4016         pr_err("error while processing smb2 query dir rc = %d\n", rc);
4017         kfree(srch_ptr);
4018
4019 err_out2:
4020         if (rc == -EINVAL)
4021                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
4022         else if (rc == -EACCES)
4023                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
4024         else if (rc == -ENOENT)
4025                 rsp->hdr.Status = STATUS_NO_SUCH_FILE;
4026         else if (rc == -EBADF)
4027                 rsp->hdr.Status = STATUS_FILE_CLOSED;
4028         else if (rc == -ENOMEM)
4029                 rsp->hdr.Status = STATUS_NO_MEMORY;
4030         else if (rc == -EFAULT)
4031                 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
4032         else if (rc == -EIO)
4033                 rsp->hdr.Status = STATUS_FILE_CORRUPT_ERROR;
4034         if (!rsp->hdr.Status)
4035                 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
4036
4037         smb2_set_err_rsp(work);
4038         ksmbd_fd_put(work, dir_fp);
4039         ksmbd_revert_fsids(work);
4040         return 0;
4041 }
4042
4043 /**
4044  * buffer_check_err() - helper function to check buffer errors
4045  * @reqOutputBufferLength:      max buffer length expected in command response
4046  * @rsp:                query info response buffer contains output buffer length
4047  * @rsp_org:            base response buffer pointer in case of chained response
4048  * @infoclass_size:     query info class response buffer size
4049  *
4050  * Return:      0 on success, otherwise error
4051  */
4052 static int buffer_check_err(int reqOutputBufferLength,
4053                             struct smb2_query_info_rsp *rsp,
4054                             void *rsp_org, int infoclass_size)
4055 {
4056         if (reqOutputBufferLength < le32_to_cpu(rsp->OutputBufferLength)) {
4057                 if (reqOutputBufferLength < infoclass_size) {
4058                         pr_err("Invalid Buffer Size Requested\n");
4059                         rsp->hdr.Status = STATUS_INFO_LENGTH_MISMATCH;
4060                         *(__be32 *)rsp_org = cpu_to_be32(sizeof(struct smb2_hdr));
4061                         return -EINVAL;
4062                 }
4063
4064                 ksmbd_debug(SMB, "Buffer Overflow\n");
4065                 rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;
4066                 *(__be32 *)rsp_org = cpu_to_be32(sizeof(struct smb2_hdr) +
4067                                 reqOutputBufferLength);
4068                 rsp->OutputBufferLength = cpu_to_le32(reqOutputBufferLength);
4069         }
4070         return 0;
4071 }
4072
4073 static void get_standard_info_pipe(struct smb2_query_info_rsp *rsp,
4074                                    void *rsp_org)
4075 {
4076         struct smb2_file_standard_info *sinfo;
4077
4078         sinfo = (struct smb2_file_standard_info *)rsp->Buffer;
4079
4080         sinfo->AllocationSize = cpu_to_le64(4096);
4081         sinfo->EndOfFile = cpu_to_le64(0);
4082         sinfo->NumberOfLinks = cpu_to_le32(1);
4083         sinfo->DeletePending = 1;
4084         sinfo->Directory = 0;
4085         rsp->OutputBufferLength =
4086                 cpu_to_le32(sizeof(struct smb2_file_standard_info));
4087         inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_standard_info));
4088 }
4089
4090 static void get_internal_info_pipe(struct smb2_query_info_rsp *rsp, u64 num,
4091                                    void *rsp_org)
4092 {
4093         struct smb2_file_internal_info *file_info;
4094
4095         file_info = (struct smb2_file_internal_info *)rsp->Buffer;
4096
4097         /* any unique number */
4098         file_info->IndexNumber = cpu_to_le64(num | (1ULL << 63));
4099         rsp->OutputBufferLength =
4100                 cpu_to_le32(sizeof(struct smb2_file_internal_info));
4101         inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_internal_info));
4102 }
4103
4104 static int smb2_get_info_file_pipe(struct ksmbd_session *sess,
4105                                    struct smb2_query_info_req *req,
4106                                    struct smb2_query_info_rsp *rsp,
4107                                    void *rsp_org)
4108 {
4109         u64 id;
4110         int rc;
4111
4112         /*
4113          * Windows can sometime send query file info request on
4114          * pipe without opening it, checking error condition here
4115          */
4116         id = req->VolatileFileId;
4117         if (!ksmbd_session_rpc_method(sess, id))
4118                 return -ENOENT;
4119
4120         ksmbd_debug(SMB, "FileInfoClass %u, FileId 0x%llx\n",
4121                     req->FileInfoClass, req->VolatileFileId);
4122
4123         switch (req->FileInfoClass) {
4124         case FILE_STANDARD_INFORMATION:
4125                 get_standard_info_pipe(rsp, rsp_org);
4126                 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
4127                                       rsp, rsp_org,
4128                                       FILE_STANDARD_INFORMATION_SIZE);
4129                 break;
4130         case FILE_INTERNAL_INFORMATION:
4131                 get_internal_info_pipe(rsp, id, rsp_org);
4132                 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
4133                                       rsp, rsp_org,
4134                                       FILE_INTERNAL_INFORMATION_SIZE);
4135                 break;
4136         default:
4137                 ksmbd_debug(SMB, "smb2_info_file_pipe for %u not supported\n",
4138                             req->FileInfoClass);
4139                 rc = -EOPNOTSUPP;
4140         }
4141         return rc;
4142 }
4143
4144 /**
4145  * smb2_get_ea() - handler for smb2 get extended attribute command
4146  * @work:       smb work containing query info command buffer
4147  * @fp:         ksmbd_file pointer
4148  * @req:        get extended attribute request
4149  * @rsp:        response buffer pointer
4150  * @rsp_org:    base response buffer pointer in case of chained response
4151  *
4152  * Return:      0 on success, otherwise error
4153  */
4154 static int smb2_get_ea(struct ksmbd_work *work, struct ksmbd_file *fp,
4155                        struct smb2_query_info_req *req,
4156                        struct smb2_query_info_rsp *rsp, void *rsp_org)
4157 {
4158         struct smb2_ea_info *eainfo, *prev_eainfo;
4159         char *name, *ptr, *xattr_list = NULL, *buf;
4160         int rc, name_len, value_len, xattr_list_len, idx;
4161         ssize_t buf_free_len, alignment_bytes, next_offset, rsp_data_cnt = 0;
4162         struct smb2_ea_info_req *ea_req = NULL;
4163         const struct path *path;
4164         struct user_namespace *user_ns = file_mnt_user_ns(fp->filp);
4165
4166         if (!(fp->daccess & FILE_READ_EA_LE)) {
4167                 pr_err("Not permitted to read ext attr : 0x%x\n",
4168                        fp->daccess);
4169                 return -EACCES;
4170         }
4171
4172         path = &fp->filp->f_path;
4173         /* single EA entry is requested with given user.* name */
4174         if (req->InputBufferLength) {
4175                 if (le32_to_cpu(req->InputBufferLength) <
4176                     sizeof(struct smb2_ea_info_req))
4177                         return -EINVAL;
4178
4179                 ea_req = (struct smb2_ea_info_req *)req->Buffer;
4180         } else {
4181                 /* need to send all EAs, if no specific EA is requested*/
4182                 if (le32_to_cpu(req->Flags) & SL_RETURN_SINGLE_ENTRY)
4183                         ksmbd_debug(SMB,
4184                                     "All EAs are requested but need to send single EA entry in rsp flags 0x%x\n",
4185                                     le32_to_cpu(req->Flags));
4186         }
4187
4188         buf_free_len =
4189                 smb2_calc_max_out_buf_len(work, 8,
4190                                           le32_to_cpu(req->OutputBufferLength));
4191         if (buf_free_len < 0)
4192                 return -EINVAL;
4193
4194         rc = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
4195         if (rc < 0) {
4196                 rsp->hdr.Status = STATUS_INVALID_HANDLE;
4197                 goto out;
4198         } else if (!rc) { /* there is no EA in the file */
4199                 ksmbd_debug(SMB, "no ea data in the file\n");
4200                 goto done;
4201         }
4202         xattr_list_len = rc;
4203
4204         ptr = (char *)rsp->Buffer;
4205         eainfo = (struct smb2_ea_info *)ptr;
4206         prev_eainfo = eainfo;
4207         idx = 0;
4208
4209         while (idx < xattr_list_len) {
4210                 name = xattr_list + idx;
4211                 name_len = strlen(name);
4212
4213                 ksmbd_debug(SMB, "%s, len %d\n", name, name_len);
4214                 idx += name_len + 1;
4215
4216                 /*
4217                  * CIFS does not support EA other than user.* namespace,
4218                  * still keep the framework generic, to list other attrs
4219                  * in future.
4220                  */
4221                 if (strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4222                         continue;
4223
4224                 if (!strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX,
4225                              STREAM_PREFIX_LEN))
4226                         continue;
4227
4228                 if (req->InputBufferLength &&
4229                     strncmp(&name[XATTR_USER_PREFIX_LEN], ea_req->name,
4230                             ea_req->EaNameLength))
4231                         continue;
4232
4233                 if (!strncmp(&name[XATTR_USER_PREFIX_LEN],
4234                              DOS_ATTRIBUTE_PREFIX, DOS_ATTRIBUTE_PREFIX_LEN))
4235                         continue;
4236
4237                 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4238                         name_len -= XATTR_USER_PREFIX_LEN;
4239
4240                 ptr = (char *)(&eainfo->name + name_len + 1);
4241                 buf_free_len -= (offsetof(struct smb2_ea_info, name) +
4242                                 name_len + 1);
4243                 /* bailout if xattr can't fit in buf_free_len */
4244                 value_len = ksmbd_vfs_getxattr(user_ns, path->dentry,
4245                                                name, &buf);
4246                 if (value_len <= 0) {
4247                         rc = -ENOENT;
4248                         rsp->hdr.Status = STATUS_INVALID_HANDLE;
4249                         goto out;
4250                 }
4251
4252                 buf_free_len -= value_len;
4253                 if (buf_free_len < 0) {
4254                         kfree(buf);
4255                         break;
4256                 }
4257
4258                 memcpy(ptr, buf, value_len);
4259                 kfree(buf);
4260
4261                 ptr += value_len;
4262                 eainfo->Flags = 0;
4263                 eainfo->EaNameLength = name_len;
4264
4265                 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4266                         memcpy(eainfo->name, &name[XATTR_USER_PREFIX_LEN],
4267                                name_len);
4268                 else
4269                         memcpy(eainfo->name, name, name_len);
4270
4271                 eainfo->name[name_len] = '\0';
4272                 eainfo->EaValueLength = cpu_to_le16(value_len);
4273                 next_offset = offsetof(struct smb2_ea_info, name) +
4274                         name_len + 1 + value_len;
4275
4276                 /* align next xattr entry at 4 byte bundary */
4277                 alignment_bytes = ((next_offset + 3) & ~3) - next_offset;
4278                 if (alignment_bytes) {
4279                         memset(ptr, '\0', alignment_bytes);
4280                         ptr += alignment_bytes;
4281                         next_offset += alignment_bytes;
4282                         buf_free_len -= alignment_bytes;
4283                 }
4284                 eainfo->NextEntryOffset = cpu_to_le32(next_offset);
4285                 prev_eainfo = eainfo;
4286                 eainfo = (struct smb2_ea_info *)ptr;
4287                 rsp_data_cnt += next_offset;
4288
4289                 if (req->InputBufferLength) {
4290                         ksmbd_debug(SMB, "single entry requested\n");
4291                         break;
4292                 }
4293         }
4294
4295         /* no more ea entries */
4296         prev_eainfo->NextEntryOffset = 0;
4297 done:
4298         rc = 0;
4299         if (rsp_data_cnt == 0)
4300                 rsp->hdr.Status = STATUS_NO_EAS_ON_FILE;
4301         rsp->OutputBufferLength = cpu_to_le32(rsp_data_cnt);
4302         inc_rfc1001_len(rsp_org, rsp_data_cnt);
4303 out:
4304         kvfree(xattr_list);
4305         return rc;
4306 }
4307
4308 static void get_file_access_info(struct smb2_query_info_rsp *rsp,
4309                                  struct ksmbd_file *fp, void *rsp_org)
4310 {
4311         struct smb2_file_access_info *file_info;
4312
4313         file_info = (struct smb2_file_access_info *)rsp->Buffer;
4314         file_info->AccessFlags = fp->daccess;
4315         rsp->OutputBufferLength =
4316                 cpu_to_le32(sizeof(struct smb2_file_access_info));
4317         inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_access_info));
4318 }
4319
4320 static int get_file_basic_info(struct smb2_query_info_rsp *rsp,
4321                                struct ksmbd_file *fp, void *rsp_org)
4322 {
4323         struct smb2_file_basic_info *basic_info;
4324         struct kstat stat;
4325         u64 time;
4326
4327         if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4328                 pr_err("no right to read the attributes : 0x%x\n",
4329                        fp->daccess);
4330                 return -EACCES;
4331         }
4332
4333         basic_info = (struct smb2_file_basic_info *)rsp->Buffer;
4334         generic_fillattr(file_mnt_user_ns(fp->filp), file_inode(fp->filp),
4335                          &stat);
4336         basic_info->CreationTime = cpu_to_le64(fp->create_time);
4337         time = ksmbd_UnixTimeToNT(stat.atime);
4338         basic_info->LastAccessTime = cpu_to_le64(time);
4339         time = ksmbd_UnixTimeToNT(stat.mtime);
4340         basic_info->LastWriteTime = cpu_to_le64(time);
4341         time = ksmbd_UnixTimeToNT(stat.ctime);
4342         basic_info->ChangeTime = cpu_to_le64(time);
4343         basic_info->Attributes = fp->f_ci->m_fattr;
4344         basic_info->Pad1 = 0;
4345         rsp->OutputBufferLength =
4346                 cpu_to_le32(sizeof(struct smb2_file_basic_info));
4347         inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_basic_info));
4348         return 0;
4349 }
4350
4351 static unsigned long long get_allocation_size(struct inode *inode,
4352                                               struct kstat *stat)
4353 {
4354         unsigned long long alloc_size = 0;
4355
4356         if (!S_ISDIR(stat->mode)) {
4357                 if ((inode->i_blocks << 9) <= stat->size)
4358                         alloc_size = stat->size;
4359                 else
4360                         alloc_size = inode->i_blocks << 9;
4361         }
4362
4363         return alloc_size;
4364 }
4365
4366 static void get_file_standard_info(struct smb2_query_info_rsp *rsp,
4367                                    struct ksmbd_file *fp, void *rsp_org)
4368 {
4369         struct smb2_file_standard_info *sinfo;
4370         unsigned int delete_pending;
4371         struct inode *inode;
4372         struct kstat stat;
4373
4374         inode = file_inode(fp->filp);
4375         generic_fillattr(file_mnt_user_ns(fp->filp), inode, &stat);
4376
4377         sinfo = (struct smb2_file_standard_info *)rsp->Buffer;
4378         delete_pending = ksmbd_inode_pending_delete(fp);
4379
4380         sinfo->AllocationSize = cpu_to_le64(get_allocation_size(inode, &stat));
4381         sinfo->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
4382         sinfo->NumberOfLinks = cpu_to_le32(get_nlink(&stat) - delete_pending);
4383         sinfo->DeletePending = delete_pending;
4384         sinfo->Directory = S_ISDIR(stat.mode) ? 1 : 0;
4385         rsp->OutputBufferLength =
4386                 cpu_to_le32(sizeof(struct smb2_file_standard_info));
4387         inc_rfc1001_len(rsp_org,
4388                         sizeof(struct smb2_file_standard_info));
4389 }
4390
4391 static void get_file_alignment_info(struct smb2_query_info_rsp *rsp,
4392                                     void *rsp_org)
4393 {
4394         struct smb2_file_alignment_info *file_info;
4395
4396         file_info = (struct smb2_file_alignment_info *)rsp->Buffer;
4397         file_info->AlignmentRequirement = 0;
4398         rsp->OutputBufferLength =
4399                 cpu_to_le32(sizeof(struct smb2_file_alignment_info));
4400         inc_rfc1001_len(rsp_org,
4401                         sizeof(struct smb2_file_alignment_info));
4402 }
4403
4404 static int get_file_all_info(struct ksmbd_work *work,
4405                              struct smb2_query_info_rsp *rsp,
4406                              struct ksmbd_file *fp,
4407                              void *rsp_org)
4408 {
4409         struct ksmbd_conn *conn = work->conn;
4410         struct smb2_file_all_info *file_info;
4411         unsigned int delete_pending;
4412         struct inode *inode;
4413         struct kstat stat;
4414         int conv_len;
4415         char *filename;
4416         u64 time;
4417
4418         if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4419                 ksmbd_debug(SMB, "no right to read the attributes : 0x%x\n",
4420                             fp->daccess);
4421                 return -EACCES;
4422         }
4423
4424         filename = convert_to_nt_pathname(work->tcon->share_conf, &fp->filp->f_path);
4425         if (IS_ERR(filename))
4426                 return PTR_ERR(filename);
4427
4428         inode = file_inode(fp->filp);
4429         generic_fillattr(file_mnt_user_ns(fp->filp), inode, &stat);
4430
4431         ksmbd_debug(SMB, "filename = %s\n", filename);
4432         delete_pending = ksmbd_inode_pending_delete(fp);
4433         file_info = (struct smb2_file_all_info *)rsp->Buffer;
4434
4435         file_info->CreationTime = cpu_to_le64(fp->create_time);
4436         time = ksmbd_UnixTimeToNT(stat.atime);
4437         file_info->LastAccessTime = cpu_to_le64(time);
4438         time = ksmbd_UnixTimeToNT(stat.mtime);
4439         file_info->LastWriteTime = cpu_to_le64(time);
4440         time = ksmbd_UnixTimeToNT(stat.ctime);
4441         file_info->ChangeTime = cpu_to_le64(time);
4442         file_info->Attributes = fp->f_ci->m_fattr;
4443         file_info->Pad1 = 0;
4444         file_info->AllocationSize =
4445                 cpu_to_le64(get_allocation_size(inode, &stat));
4446         file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
4447         file_info->NumberOfLinks =
4448                         cpu_to_le32(get_nlink(&stat) - delete_pending);
4449         file_info->DeletePending = delete_pending;
4450         file_info->Directory = S_ISDIR(stat.mode) ? 1 : 0;
4451         file_info->Pad2 = 0;
4452         file_info->IndexNumber = cpu_to_le64(stat.ino);
4453         file_info->EASize = 0;
4454         file_info->AccessFlags = fp->daccess;
4455         file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos);
4456         file_info->Mode = fp->coption;
4457         file_info->AlignmentRequirement = 0;
4458         conv_len = smbConvertToUTF16((__le16 *)file_info->FileName, filename,
4459                                      PATH_MAX, conn->local_nls, 0);
4460         conv_len *= 2;
4461         file_info->FileNameLength = cpu_to_le32(conv_len);
4462         rsp->OutputBufferLength =
4463                 cpu_to_le32(sizeof(struct smb2_file_all_info) + conv_len - 1);
4464         kfree(filename);
4465         inc_rfc1001_len(rsp_org, le32_to_cpu(rsp->OutputBufferLength));
4466         return 0;
4467 }
4468
4469 static void get_file_alternate_info(struct ksmbd_work *work,
4470                                     struct smb2_query_info_rsp *rsp,
4471                                     struct ksmbd_file *fp,
4472                                     void *rsp_org)
4473 {
4474         struct ksmbd_conn *conn = work->conn;
4475         struct smb2_file_alt_name_info *file_info;
4476         struct dentry *dentry = fp->filp->f_path.dentry;
4477         int conv_len;
4478
4479         spin_lock(&dentry->d_lock);
4480         file_info = (struct smb2_file_alt_name_info *)rsp->Buffer;
4481         conv_len = ksmbd_extract_shortname(conn,
4482                                            dentry->d_name.name,
4483                                            file_info->FileName);
4484         spin_unlock(&dentry->d_lock);
4485         file_info->FileNameLength = cpu_to_le32(conv_len);
4486         rsp->OutputBufferLength =
4487                 cpu_to_le32(sizeof(struct smb2_file_alt_name_info) + conv_len);
4488         inc_rfc1001_len(rsp_org, le32_to_cpu(rsp->OutputBufferLength));
4489 }
4490
4491 static void get_file_stream_info(struct ksmbd_work *work,
4492                                  struct smb2_query_info_rsp *rsp,
4493                                  struct ksmbd_file *fp,
4494                                  void *rsp_org)
4495 {
4496         struct ksmbd_conn *conn = work->conn;
4497         struct smb2_file_stream_info *file_info;
4498         char *stream_name, *xattr_list = NULL, *stream_buf;
4499         struct kstat stat;
4500         const struct path *path = &fp->filp->f_path;
4501         ssize_t xattr_list_len;
4502         int nbytes = 0, streamlen, stream_name_len, next, idx = 0;
4503         int buf_free_len;
4504         struct smb2_query_info_req *req = ksmbd_req_buf_next(work);
4505
4506         generic_fillattr(file_mnt_user_ns(fp->filp), file_inode(fp->filp),
4507                          &stat);
4508         file_info = (struct smb2_file_stream_info *)rsp->Buffer;
4509
4510         buf_free_len =
4511                 smb2_calc_max_out_buf_len(work, 8,
4512                                           le32_to_cpu(req->OutputBufferLength));
4513         if (buf_free_len < 0)
4514                 goto out;
4515
4516         xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
4517         if (xattr_list_len < 0) {
4518                 goto out;
4519         } else if (!xattr_list_len) {
4520                 ksmbd_debug(SMB, "empty xattr in the file\n");
4521                 goto out;
4522         }
4523
4524         while (idx < xattr_list_len) {
4525                 stream_name = xattr_list + idx;
4526                 streamlen = strlen(stream_name);
4527                 idx += streamlen + 1;
4528
4529                 ksmbd_debug(SMB, "%s, len %d\n", stream_name, streamlen);
4530
4531                 if (strncmp(&stream_name[XATTR_USER_PREFIX_LEN],
4532                             STREAM_PREFIX, STREAM_PREFIX_LEN))
4533                         continue;
4534
4535                 stream_name_len = streamlen - (XATTR_USER_PREFIX_LEN +
4536                                 STREAM_PREFIX_LEN);
4537                 streamlen = stream_name_len;
4538
4539                 /* plus : size */
4540                 streamlen += 1;
4541                 stream_buf = kmalloc(streamlen + 1, GFP_KERNEL);
4542                 if (!stream_buf)
4543                         break;
4544
4545                 streamlen = snprintf(stream_buf, streamlen + 1,
4546                                      ":%s", &stream_name[XATTR_NAME_STREAM_LEN]);
4547
4548                 next = sizeof(struct smb2_file_stream_info) + streamlen * 2;
4549                 if (next > buf_free_len) {
4550                         kfree(stream_buf);
4551                         break;
4552                 }
4553
4554                 file_info = (struct smb2_file_stream_info *)&rsp->Buffer[nbytes];
4555                 streamlen  = smbConvertToUTF16((__le16 *)file_info->StreamName,
4556                                                stream_buf, streamlen,
4557                                                conn->local_nls, 0);
4558                 streamlen *= 2;
4559                 kfree(stream_buf);
4560                 file_info->StreamNameLength = cpu_to_le32(streamlen);
4561                 file_info->StreamSize = cpu_to_le64(stream_name_len);
4562                 file_info->StreamAllocationSize = cpu_to_le64(stream_name_len);
4563
4564                 nbytes += next;
4565                 buf_free_len -= next;
4566                 file_info->NextEntryOffset = cpu_to_le32(next);
4567         }
4568
4569 out:
4570         if (!S_ISDIR(stat.mode) &&
4571             buf_free_len >= sizeof(struct smb2_file_stream_info) + 7 * 2) {
4572                 file_info = (struct smb2_file_stream_info *)
4573                         &rsp->Buffer[nbytes];
4574                 streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName,
4575                                               "::$DATA", 7, conn->local_nls, 0);
4576                 streamlen *= 2;
4577                 file_info->StreamNameLength = cpu_to_le32(streamlen);
4578                 file_info->StreamSize = cpu_to_le64(stat.size);
4579                 file_info->StreamAllocationSize = cpu_to_le64(stat.blocks << 9);
4580                 nbytes += sizeof(struct smb2_file_stream_info) + streamlen;
4581         }
4582
4583         /* last entry offset should be 0 */
4584         file_info->NextEntryOffset = 0;
4585         kvfree(xattr_list);
4586
4587         rsp->OutputBufferLength = cpu_to_le32(nbytes);
4588         inc_rfc1001_len(rsp_org, nbytes);
4589 }
4590
4591 static void get_file_internal_info(struct smb2_query_info_rsp *rsp,
4592                                    struct ksmbd_file *fp, void *rsp_org)
4593 {
4594         struct smb2_file_internal_info *file_info;
4595         struct kstat stat;
4596
4597         generic_fillattr(file_mnt_user_ns(fp->filp), file_inode(fp->filp),
4598                          &stat);
4599         file_info = (struct smb2_file_internal_info *)rsp->Buffer;
4600         file_info->IndexNumber = cpu_to_le64(stat.ino);
4601         rsp->OutputBufferLength =
4602                 cpu_to_le32(sizeof(struct smb2_file_internal_info));
4603         inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_internal_info));
4604 }
4605
4606 static int get_file_network_open_info(struct smb2_query_info_rsp *rsp,
4607                                       struct ksmbd_file *fp, void *rsp_org)
4608 {
4609         struct smb2_file_ntwrk_info *file_info;
4610         struct inode *inode;
4611         struct kstat stat;
4612         u64 time;
4613
4614         if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4615                 pr_err("no right to read the attributes : 0x%x\n",
4616                        fp->daccess);
4617                 return -EACCES;
4618         }
4619
4620         file_info = (struct smb2_file_ntwrk_info *)rsp->Buffer;
4621
4622         inode = file_inode(fp->filp);
4623         generic_fillattr(file_mnt_user_ns(fp->filp), inode, &stat);
4624
4625         file_info->CreationTime = cpu_to_le64(fp->create_time);
4626         time = ksmbd_UnixTimeToNT(stat.atime);
4627         file_info->LastAccessTime = cpu_to_le64(time);
4628         time = ksmbd_UnixTimeToNT(stat.mtime);
4629         file_info->LastWriteTime = cpu_to_le64(time);
4630         time = ksmbd_UnixTimeToNT(stat.ctime);
4631         file_info->ChangeTime = cpu_to_le64(time);
4632         file_info->Attributes = fp->f_ci->m_fattr;
4633         file_info->AllocationSize =
4634                 cpu_to_le64(get_allocation_size(inode, &stat));
4635         file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
4636         file_info->Reserved = cpu_to_le32(0);
4637         rsp->OutputBufferLength =
4638                 cpu_to_le32(sizeof(struct smb2_file_ntwrk_info));
4639         inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_ntwrk_info));
4640         return 0;
4641 }
4642
4643 static void get_file_ea_info(struct smb2_query_info_rsp *rsp, void *rsp_org)
4644 {
4645         struct smb2_file_ea_info *file_info;
4646
4647         file_info = (struct smb2_file_ea_info *)rsp->Buffer;
4648         file_info->EASize = 0;
4649         rsp->OutputBufferLength =
4650                 cpu_to_le32(sizeof(struct smb2_file_ea_info));
4651         inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_ea_info));
4652 }
4653
4654 static void get_file_position_info(struct smb2_query_info_rsp *rsp,
4655                                    struct ksmbd_file *fp, void *rsp_org)
4656 {
4657         struct smb2_file_pos_info *file_info;
4658
4659         file_info = (struct smb2_file_pos_info *)rsp->Buffer;
4660         file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos);
4661         rsp->OutputBufferLength =
4662                 cpu_to_le32(sizeof(struct smb2_file_pos_info));
4663         inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_pos_info));
4664 }
4665
4666 static void get_file_mode_info(struct smb2_query_info_rsp *rsp,
4667                                struct ksmbd_file *fp, void *rsp_org)
4668 {
4669         struct smb2_file_mode_info *file_info;
4670
4671         file_info = (struct smb2_file_mode_info *)rsp->Buffer;
4672         file_info->Mode = fp->coption & FILE_MODE_INFO_MASK;
4673         rsp->OutputBufferLength =
4674                 cpu_to_le32(sizeof(struct smb2_file_mode_info));
4675         inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_mode_info));
4676 }
4677
4678 static void get_file_compression_info(struct smb2_query_info_rsp *rsp,
4679                                       struct ksmbd_file *fp, void *rsp_org)
4680 {
4681         struct smb2_file_comp_info *file_info;
4682         struct kstat stat;
4683
4684         generic_fillattr(file_mnt_user_ns(fp->filp), file_inode(fp->filp),
4685                          &stat);
4686
4687         file_info = (struct smb2_file_comp_info *)rsp->Buffer;
4688         file_info->CompressedFileSize = cpu_to_le64(stat.blocks << 9);
4689         file_info->CompressionFormat = COMPRESSION_FORMAT_NONE;
4690         file_info->CompressionUnitShift = 0;
4691         file_info->ChunkShift = 0;
4692         file_info->ClusterShift = 0;
4693         memset(&file_info->Reserved[0], 0, 3);
4694
4695         rsp->OutputBufferLength =
4696                 cpu_to_le32(sizeof(struct smb2_file_comp_info));
4697         inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_comp_info));
4698 }
4699
4700 static int get_file_attribute_tag_info(struct smb2_query_info_rsp *rsp,
4701                                        struct ksmbd_file *fp, void *rsp_org)
4702 {
4703         struct smb2_file_attr_tag_info *file_info;
4704
4705         if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4706                 pr_err("no right to read the attributes : 0x%x\n",
4707                        fp->daccess);
4708                 return -EACCES;
4709         }
4710
4711         file_info = (struct smb2_file_attr_tag_info *)rsp->Buffer;
4712         file_info->FileAttributes = fp->f_ci->m_fattr;
4713         file_info->ReparseTag = 0;
4714         rsp->OutputBufferLength =
4715                 cpu_to_le32(sizeof(struct smb2_file_attr_tag_info));
4716         inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_attr_tag_info));
4717         return 0;
4718 }
4719
4720 static int find_file_posix_info(struct smb2_query_info_rsp *rsp,
4721                                 struct ksmbd_file *fp, void *rsp_org)
4722 {
4723         struct smb311_posix_qinfo *file_info;
4724         struct inode *inode = file_inode(fp->filp);
4725         struct user_namespace *user_ns = file_mnt_user_ns(fp->filp);
4726         vfsuid_t vfsuid = i_uid_into_vfsuid(user_ns, inode);
4727         vfsgid_t vfsgid = i_gid_into_vfsgid(user_ns, inode);
4728         u64 time;
4729         int out_buf_len = sizeof(struct smb311_posix_qinfo) + 32;
4730
4731         file_info = (struct smb311_posix_qinfo *)rsp->Buffer;
4732         file_info->CreationTime = cpu_to_le64(fp->create_time);
4733         time = ksmbd_UnixTimeToNT(inode->i_atime);
4734         file_info->LastAccessTime = cpu_to_le64(time);
4735         time = ksmbd_UnixTimeToNT(inode->i_mtime);
4736         file_info->LastWriteTime = cpu_to_le64(time);
4737         time = ksmbd_UnixTimeToNT(inode->i_ctime);
4738         file_info->ChangeTime = cpu_to_le64(time);
4739         file_info->DosAttributes = fp->f_ci->m_fattr;
4740         file_info->Inode = cpu_to_le64(inode->i_ino);
4741         file_info->EndOfFile = cpu_to_le64(inode->i_size);
4742         file_info->AllocationSize = cpu_to_le64(inode->i_blocks << 9);
4743         file_info->HardLinks = cpu_to_le32(inode->i_nlink);
4744         file_info->Mode = cpu_to_le32(inode->i_mode & 0777);
4745         file_info->DeviceId = cpu_to_le32(inode->i_rdev);
4746
4747         /*
4748          * Sids(32) contain two sids(Domain sid(16), UNIX group sid(16)).
4749          * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) +
4750          *                sub_auth(4 * 1(num_subauth)) + RID(4).
4751          */
4752         id_to_sid(from_kuid_munged(&init_user_ns, vfsuid_into_kuid(vfsuid)),
4753                   SIDUNIX_USER, (struct smb_sid *)&file_info->Sids[0]);
4754         id_to_sid(from_kgid_munged(&init_user_ns, vfsgid_into_kgid(vfsgid)),
4755                   SIDUNIX_GROUP, (struct smb_sid *)&file_info->Sids[16]);
4756
4757         rsp->OutputBufferLength = cpu_to_le32(out_buf_len);
4758         inc_rfc1001_len(rsp_org, out_buf_len);
4759         return out_buf_len;
4760 }
4761
4762 static int smb2_get_info_file(struct ksmbd_work *work,
4763                               struct smb2_query_info_req *req,
4764                               struct smb2_query_info_rsp *rsp)
4765 {
4766         struct ksmbd_file *fp;
4767         int fileinfoclass = 0;
4768         int rc = 0;
4769         int file_infoclass_size;
4770         unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
4771
4772         if (test_share_config_flag(work->tcon->share_conf,
4773                                    KSMBD_SHARE_FLAG_PIPE)) {
4774                 /* smb2 info file called for pipe */
4775                 return smb2_get_info_file_pipe(work->sess, req, rsp,
4776                                                work->response_buf);
4777         }
4778
4779         if (work->next_smb2_rcv_hdr_off) {
4780                 if (!has_file_id(req->VolatileFileId)) {
4781                         ksmbd_debug(SMB, "Compound request set FID = %llu\n",
4782                                     work->compound_fid);
4783                         id = work->compound_fid;
4784                         pid = work->compound_pfid;
4785                 }
4786         }
4787
4788         if (!has_file_id(id)) {
4789                 id = req->VolatileFileId;
4790                 pid = req->PersistentFileId;
4791         }
4792
4793         fp = ksmbd_lookup_fd_slow(work, id, pid);
4794         if (!fp)
4795                 return -ENOENT;
4796
4797         fileinfoclass = req->FileInfoClass;
4798
4799         switch (fileinfoclass) {
4800         case FILE_ACCESS_INFORMATION:
4801                 get_file_access_info(rsp, fp, work->response_buf);
4802                 file_infoclass_size = FILE_ACCESS_INFORMATION_SIZE;
4803                 break;
4804
4805         case FILE_BASIC_INFORMATION:
4806                 rc = get_file_basic_info(rsp, fp, work->response_buf);
4807                 file_infoclass_size = FILE_BASIC_INFORMATION_SIZE;
4808                 break;
4809
4810         case FILE_STANDARD_INFORMATION:
4811                 get_file_standard_info(rsp, fp, work->response_buf);
4812                 file_infoclass_size = FILE_STANDARD_INFORMATION_SIZE;
4813                 break;
4814
4815         case FILE_ALIGNMENT_INFORMATION:
4816                 get_file_alignment_info(rsp, work->response_buf);
4817                 file_infoclass_size = FILE_ALIGNMENT_INFORMATION_SIZE;
4818                 break;
4819
4820         case FILE_ALL_INFORMATION:
4821                 rc = get_file_all_info(work, rsp, fp, work->response_buf);
4822                 file_infoclass_size = FILE_ALL_INFORMATION_SIZE;
4823                 break;
4824
4825         case FILE_ALTERNATE_NAME_INFORMATION:
4826                 get_file_alternate_info(work, rsp, fp, work->response_buf);
4827                 file_infoclass_size = FILE_ALTERNATE_NAME_INFORMATION_SIZE;
4828                 break;
4829
4830         case FILE_STREAM_INFORMATION:
4831                 get_file_stream_info(work, rsp, fp, work->response_buf);
4832                 file_infoclass_size = FILE_STREAM_INFORMATION_SIZE;
4833                 break;
4834
4835         case FILE_INTERNAL_INFORMATION:
4836                 get_file_internal_info(rsp, fp, work->response_buf);
4837                 file_infoclass_size = FILE_INTERNAL_INFORMATION_SIZE;
4838                 break;
4839
4840         case FILE_NETWORK_OPEN_INFORMATION:
4841                 rc = get_file_network_open_info(rsp, fp, work->response_buf);
4842                 file_infoclass_size = FILE_NETWORK_OPEN_INFORMATION_SIZE;
4843                 break;
4844
4845         case FILE_EA_INFORMATION:
4846                 get_file_ea_info(rsp, work->response_buf);
4847                 file_infoclass_size = FILE_EA_INFORMATION_SIZE;
4848                 break;
4849
4850         case FILE_FULL_EA_INFORMATION:
4851                 rc = smb2_get_ea(work, fp, req, rsp, work->response_buf);
4852                 file_infoclass_size = FILE_FULL_EA_INFORMATION_SIZE;
4853                 break;
4854
4855         case FILE_POSITION_INFORMATION:
4856                 get_file_position_info(rsp, fp, work->response_buf);
4857                 file_infoclass_size = FILE_POSITION_INFORMATION_SIZE;
4858                 break;
4859
4860         case FILE_MODE_INFORMATION:
4861                 get_file_mode_info(rsp, fp, work->response_buf);
4862                 file_infoclass_size = FILE_MODE_INFORMATION_SIZE;
4863                 break;
4864
4865         case FILE_COMPRESSION_INFORMATION:
4866                 get_file_compression_info(rsp, fp, work->response_buf);
4867                 file_infoclass_size = FILE_COMPRESSION_INFORMATION_SIZE;
4868                 break;
4869
4870         case FILE_ATTRIBUTE_TAG_INFORMATION:
4871                 rc = get_file_attribute_tag_info(rsp, fp, work->response_buf);
4872                 file_infoclass_size = FILE_ATTRIBUTE_TAG_INFORMATION_SIZE;
4873                 break;
4874         case SMB_FIND_FILE_POSIX_INFO:
4875                 if (!work->tcon->posix_extensions) {
4876                         pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n");
4877                         rc = -EOPNOTSUPP;
4878                 } else {
4879                         file_infoclass_size = find_file_posix_info(rsp, fp,
4880                                         work->response_buf);
4881                 }
4882                 break;
4883         default:
4884                 ksmbd_debug(SMB, "fileinfoclass %d not supported yet\n",
4885                             fileinfoclass);
4886                 rc = -EOPNOTSUPP;
4887         }
4888         if (!rc)
4889                 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
4890                                       rsp, work->response_buf,
4891                                       file_infoclass_size);
4892         ksmbd_fd_put(work, fp);
4893         return rc;
4894 }
4895
4896 static int smb2_get_info_filesystem(struct ksmbd_work *work,
4897                                     struct smb2_query_info_req *req,
4898                                     struct smb2_query_info_rsp *rsp)
4899 {
4900         struct ksmbd_session *sess = work->sess;
4901         struct ksmbd_conn *conn = work->conn;
4902         struct ksmbd_share_config *share = work->tcon->share_conf;
4903         int fsinfoclass = 0;
4904         struct kstatfs stfs;
4905         struct path path;
4906         int rc = 0, len;
4907         int fs_infoclass_size = 0;
4908
4909         rc = kern_path(share->path, LOOKUP_NO_SYMLINKS, &path);
4910         if (rc) {
4911                 pr_err("cannot create vfs path\n");
4912                 return -EIO;
4913         }
4914
4915         rc = vfs_statfs(&path, &stfs);
4916         if (rc) {
4917                 pr_err("cannot do stat of path %s\n", share->path);
4918                 path_put(&path);
4919                 return -EIO;
4920         }
4921
4922         fsinfoclass = req->FileInfoClass;
4923
4924         switch (fsinfoclass) {
4925         case FS_DEVICE_INFORMATION:
4926         {
4927                 struct filesystem_device_info *info;
4928
4929                 info = (struct filesystem_device_info *)rsp->Buffer;
4930
4931                 info->DeviceType = cpu_to_le32(stfs.f_type);
4932                 info->DeviceCharacteristics = cpu_to_le32(0x00000020);
4933                 rsp->OutputBufferLength = cpu_to_le32(8);
4934                 inc_rfc1001_len(work->response_buf, 8);
4935                 fs_infoclass_size = FS_DEVICE_INFORMATION_SIZE;
4936                 break;
4937         }
4938         case FS_ATTRIBUTE_INFORMATION:
4939         {
4940                 struct filesystem_attribute_info *info;
4941                 size_t sz;
4942
4943                 info = (struct filesystem_attribute_info *)rsp->Buffer;
4944                 info->Attributes = cpu_to_le32(FILE_SUPPORTS_OBJECT_IDS |
4945                                                FILE_PERSISTENT_ACLS |
4946                                                FILE_UNICODE_ON_DISK |
4947                                                FILE_CASE_PRESERVED_NAMES |
4948                                                FILE_CASE_SENSITIVE_SEARCH |
4949                                                FILE_SUPPORTS_BLOCK_REFCOUNTING);
4950
4951                 info->Attributes |= cpu_to_le32(server_conf.share_fake_fscaps);
4952
4953                 info->MaxPathNameComponentLength = cpu_to_le32(stfs.f_namelen);
4954                 len = smbConvertToUTF16((__le16 *)info->FileSystemName,
4955                                         "NTFS", PATH_MAX, conn->local_nls, 0);
4956                 len = len * 2;
4957                 info->FileSystemNameLen = cpu_to_le32(len);
4958                 sz = sizeof(struct filesystem_attribute_info) - 2 + len;
4959                 rsp->OutputBufferLength = cpu_to_le32(sz);
4960                 inc_rfc1001_len(work->response_buf, sz);
4961                 fs_infoclass_size = FS_ATTRIBUTE_INFORMATION_SIZE;
4962                 break;
4963         }
4964         case FS_VOLUME_INFORMATION:
4965         {
4966                 struct filesystem_vol_info *info;
4967                 size_t sz;
4968                 unsigned int serial_crc = 0;
4969
4970                 info = (struct filesystem_vol_info *)(rsp->Buffer);
4971                 info->VolumeCreationTime = 0;
4972                 serial_crc = crc32_le(serial_crc, share->name,
4973                                       strlen(share->name));
4974                 serial_crc = crc32_le(serial_crc, share->path,
4975                                       strlen(share->path));
4976                 serial_crc = crc32_le(serial_crc, ksmbd_netbios_name(),
4977                                       strlen(ksmbd_netbios_name()));
4978                 /* Taking dummy value of serial number*/
4979                 info->SerialNumber = cpu_to_le32(serial_crc);
4980                 len = smbConvertToUTF16((__le16 *)info->VolumeLabel,
4981                                         share->name, PATH_MAX,
4982                                         conn->local_nls, 0);
4983                 len = len * 2;
4984                 info->VolumeLabelSize = cpu_to_le32(len);
4985                 info->Reserved = 0;
4986                 sz = sizeof(struct filesystem_vol_info) - 2 + len;
4987                 rsp->OutputBufferLength = cpu_to_le32(sz);
4988                 inc_rfc1001_len(work->response_buf, sz);
4989                 fs_infoclass_size = FS_VOLUME_INFORMATION_SIZE;
4990                 break;
4991         }
4992         case FS_SIZE_INFORMATION:
4993         {
4994                 struct filesystem_info *info;
4995
4996                 info = (struct filesystem_info *)(rsp->Buffer);
4997                 info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks);
4998                 info->FreeAllocationUnits = cpu_to_le64(stfs.f_bfree);
4999                 info->SectorsPerAllocationUnit = cpu_to_le32(1);
5000                 info->BytesPerSector = cpu_to_le32(stfs.f_bsize);
5001                 rsp->OutputBufferLength = cpu_to_le32(24);
5002                 inc_rfc1001_len(work->response_buf, 24);
5003                 fs_infoclass_size = FS_SIZE_INFORMATION_SIZE;
5004                 break;
5005         }
5006         case FS_FULL_SIZE_INFORMATION:
5007         {
5008                 struct smb2_fs_full_size_info *info;
5009
5010                 info = (struct smb2_fs_full_size_info *)(rsp->Buffer);
5011                 info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks);
5012                 info->CallerAvailableAllocationUnits =
5013                                         cpu_to_le64(stfs.f_bavail);
5014                 info->ActualAvailableAllocationUnits =
5015                                         cpu_to_le64(stfs.f_bfree);
5016                 info->SectorsPerAllocationUnit = cpu_to_le32(1);
5017                 info->BytesPerSector = cpu_to_le32(stfs.f_bsize);
5018                 rsp->OutputBufferLength = cpu_to_le32(32);
5019                 inc_rfc1001_len(work->response_buf, 32);
5020                 fs_infoclass_size = FS_FULL_SIZE_INFORMATION_SIZE;
5021                 break;
5022         }
5023         case FS_OBJECT_ID_INFORMATION:
5024         {
5025                 struct object_id_info *info;
5026
5027                 info = (struct object_id_info *)(rsp->Buffer);
5028
5029                 if (!user_guest(sess->user))
5030                         memcpy(info->objid, user_passkey(sess->user), 16);
5031                 else
5032                         memset(info->objid, 0, 16);
5033
5034                 info->extended_info.magic = cpu_to_le32(EXTENDED_INFO_MAGIC);
5035                 info->extended_info.version = cpu_to_le32(1);
5036                 info->extended_info.release = cpu_to_le32(1);
5037                 info->extended_info.rel_date = 0;
5038                 memcpy(info->extended_info.version_string, "1.1.0", strlen("1.1.0"));
5039                 rsp->OutputBufferLength = cpu_to_le32(64);
5040                 inc_rfc1001_len(work->response_buf, 64);
5041                 fs_infoclass_size = FS_OBJECT_ID_INFORMATION_SIZE;
5042                 break;
5043         }
5044         case FS_SECTOR_SIZE_INFORMATION:
5045         {
5046                 struct smb3_fs_ss_info *info;
5047                 unsigned int sector_size =
5048                         min_t(unsigned int, path.mnt->mnt_sb->s_blocksize, 4096);
5049
5050                 info = (struct smb3_fs_ss_info *)(rsp->Buffer);
5051
5052                 info->LogicalBytesPerSector = cpu_to_le32(sector_size);
5053                 info->PhysicalBytesPerSectorForAtomicity =
5054                                 cpu_to_le32(sector_size);
5055                 info->PhysicalBytesPerSectorForPerf = cpu_to_le32(sector_size);
5056                 info->FSEffPhysicalBytesPerSectorForAtomicity =
5057                                 cpu_to_le32(sector_size);
5058                 info->Flags = cpu_to_le32(SSINFO_FLAGS_ALIGNED_DEVICE |
5059                                     SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE);
5060                 info->ByteOffsetForSectorAlignment = 0;
5061                 info->ByteOffsetForPartitionAlignment = 0;
5062                 rsp->OutputBufferLength = cpu_to_le32(28);
5063                 inc_rfc1001_len(work->response_buf, 28);
5064                 fs_infoclass_size = FS_SECTOR_SIZE_INFORMATION_SIZE;
5065                 break;
5066         }
5067         case FS_CONTROL_INFORMATION:
5068         {
5069                 /*
5070                  * TODO : The current implementation is based on
5071                  * test result with win7(NTFS) server. It's need to
5072                  * modify this to get valid Quota values
5073                  * from Linux kernel
5074                  */
5075                 struct smb2_fs_control_info *info;
5076
5077                 info = (struct smb2_fs_control_info *)(rsp->Buffer);
5078                 info->FreeSpaceStartFiltering = 0;
5079                 info->FreeSpaceThreshold = 0;
5080                 info->FreeSpaceStopFiltering = 0;
5081                 info->DefaultQuotaThreshold = cpu_to_le64(SMB2_NO_FID);
5082                 info->DefaultQuotaLimit = cpu_to_le64(SMB2_NO_FID);
5083                 info->Padding = 0;
5084                 rsp->OutputBufferLength = cpu_to_le32(48);
5085                 inc_rfc1001_len(work->response_buf, 48);
5086                 fs_infoclass_size = FS_CONTROL_INFORMATION_SIZE;
5087                 break;
5088         }
5089         case FS_POSIX_INFORMATION:
5090         {
5091                 struct filesystem_posix_info *info;
5092
5093                 if (!work->tcon->posix_extensions) {
5094                         pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n");
5095                         rc = -EOPNOTSUPP;
5096                 } else {
5097                         info = (struct filesystem_posix_info *)(rsp->Buffer);
5098                         info->OptimalTransferSize = cpu_to_le32(stfs.f_bsize);
5099                         info->BlockSize = cpu_to_le32(stfs.f_bsize);
5100                         info->TotalBlocks = cpu_to_le64(stfs.f_blocks);
5101                         info->BlocksAvail = cpu_to_le64(stfs.f_bfree);
5102                         info->UserBlocksAvail = cpu_to_le64(stfs.f_bavail);
5103                         info->TotalFileNodes = cpu_to_le64(stfs.f_files);
5104                         info->FreeFileNodes = cpu_to_le64(stfs.f_ffree);
5105                         rsp->OutputBufferLength = cpu_to_le32(56);
5106                         inc_rfc1001_len(work->response_buf, 56);
5107                         fs_infoclass_size = FS_POSIX_INFORMATION_SIZE;
5108                 }
5109                 break;
5110         }
5111         default:
5112                 path_put(&path);
5113                 return -EOPNOTSUPP;
5114         }
5115         rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
5116                               rsp, work->response_buf,
5117                               fs_infoclass_size);
5118         path_put(&path);
5119         return rc;
5120 }
5121
5122 static int smb2_get_info_sec(struct ksmbd_work *work,
5123                              struct smb2_query_info_req *req,
5124                              struct smb2_query_info_rsp *rsp)
5125 {
5126         struct ksmbd_file *fp;
5127         struct user_namespace *user_ns;
5128         struct smb_ntsd *pntsd = (struct smb_ntsd *)rsp->Buffer, *ppntsd = NULL;
5129         struct smb_fattr fattr = {{0}};
5130         struct inode *inode;
5131         __u32 secdesclen = 0;
5132         unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
5133         int addition_info = le32_to_cpu(req->AdditionalInformation);
5134         int rc = 0, ppntsd_size = 0;
5135
5136         if (addition_info & ~(OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO |
5137                               PROTECTED_DACL_SECINFO |
5138                               UNPROTECTED_DACL_SECINFO)) {
5139                 ksmbd_debug(SMB, "Unsupported addition info: 0x%x)\n",
5140                        addition_info);
5141
5142                 pntsd->revision = cpu_to_le16(1);
5143                 pntsd->type = cpu_to_le16(SELF_RELATIVE | DACL_PROTECTED);
5144                 pntsd->osidoffset = 0;
5145                 pntsd->gsidoffset = 0;
5146                 pntsd->sacloffset = 0;
5147                 pntsd->dacloffset = 0;
5148
5149                 secdesclen = sizeof(struct smb_ntsd);
5150                 rsp->OutputBufferLength = cpu_to_le32(secdesclen);
5151                 inc_rfc1001_len(work->response_buf, secdesclen);
5152
5153                 return 0;
5154         }
5155
5156         if (work->next_smb2_rcv_hdr_off) {
5157                 if (!has_file_id(req->VolatileFileId)) {
5158                         ksmbd_debug(SMB, "Compound request set FID = %llu\n",
5159                                     work->compound_fid);
5160                         id = work->compound_fid;
5161                         pid = work->compound_pfid;
5162                 }
5163         }
5164
5165         if (!has_file_id(id)) {
5166                 id = req->VolatileFileId;
5167                 pid = req->PersistentFileId;
5168         }
5169
5170         fp = ksmbd_lookup_fd_slow(work, id, pid);
5171         if (!fp)
5172                 return -ENOENT;
5173
5174         user_ns = file_mnt_user_ns(fp->filp);
5175         inode = file_inode(fp->filp);
5176         ksmbd_acls_fattr(&fattr, user_ns, inode);
5177
5178         if (test_share_config_flag(work->tcon->share_conf,
5179                                    KSMBD_SHARE_FLAG_ACL_XATTR))
5180                 ppntsd_size = ksmbd_vfs_get_sd_xattr(work->conn, user_ns,
5181                                                      fp->filp->f_path.dentry,
5182                                                      &ppntsd);
5183
5184         /* Check if sd buffer size exceeds response buffer size */
5185         if (smb2_resp_buf_len(work, 8) > ppntsd_size)
5186                 rc = build_sec_desc(user_ns, pntsd, ppntsd, ppntsd_size,
5187                                     addition_info, &secdesclen, &fattr);
5188         posix_acl_release(fattr.cf_acls);
5189         posix_acl_release(fattr.cf_dacls);
5190         kfree(ppntsd);
5191         ksmbd_fd_put(work, fp);
5192         if (rc)
5193                 return rc;
5194
5195         rsp->OutputBufferLength = cpu_to_le32(secdesclen);
5196         inc_rfc1001_len(work->response_buf, secdesclen);
5197         return 0;
5198 }
5199
5200 /**
5201  * smb2_query_info() - handler for smb2 query info command
5202  * @work:       smb work containing query info request buffer
5203  *
5204  * Return:      0 on success, otherwise error
5205  */
5206 int smb2_query_info(struct ksmbd_work *work)
5207 {
5208         struct smb2_query_info_req *req;
5209         struct smb2_query_info_rsp *rsp;
5210         int rc = 0;
5211
5212         WORK_BUFFERS(work, req, rsp);
5213
5214         ksmbd_debug(SMB, "GOT query info request\n");
5215
5216         switch (req->InfoType) {
5217         case SMB2_O_INFO_FILE:
5218                 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n");
5219                 rc = smb2_get_info_file(work, req, rsp);
5220                 break;
5221         case SMB2_O_INFO_FILESYSTEM:
5222                 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILESYSTEM\n");
5223                 rc = smb2_get_info_filesystem(work, req, rsp);
5224                 break;
5225         case SMB2_O_INFO_SECURITY:
5226                 ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n");
5227                 rc = smb2_get_info_sec(work, req, rsp);
5228                 break;
5229         default:
5230                 ksmbd_debug(SMB, "InfoType %d not supported yet\n",
5231                             req->InfoType);
5232                 rc = -EOPNOTSUPP;
5233         }
5234
5235         if (rc < 0) {
5236                 if (rc == -EACCES)
5237                         rsp->hdr.Status = STATUS_ACCESS_DENIED;
5238                 else if (rc == -ENOENT)
5239                         rsp->hdr.Status = STATUS_FILE_CLOSED;
5240                 else if (rc == -EIO)
5241                         rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
5242                 else if (rc == -EOPNOTSUPP || rsp->hdr.Status == 0)
5243                         rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
5244                 smb2_set_err_rsp(work);
5245
5246                 ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n",
5247                             rc);
5248                 return rc;
5249         }
5250         rsp->StructureSize = cpu_to_le16(9);
5251         rsp->OutputBufferOffset = cpu_to_le16(72);
5252         inc_rfc1001_len(work->response_buf, 8);
5253         return 0;
5254 }
5255
5256 /**
5257  * smb2_close_pipe() - handler for closing IPC pipe
5258  * @work:       smb work containing close request buffer
5259  *
5260  * Return:      0
5261  */
5262 static noinline int smb2_close_pipe(struct ksmbd_work *work)
5263 {
5264         u64 id;
5265         struct smb2_close_req *req = smb2_get_msg(work->request_buf);
5266         struct smb2_close_rsp *rsp = smb2_get_msg(work->response_buf);
5267
5268         id = req->VolatileFileId;
5269         ksmbd_session_rpc_close(work->sess, id);
5270
5271         rsp->StructureSize = cpu_to_le16(60);
5272         rsp->Flags = 0;
5273         rsp->Reserved = 0;
5274         rsp->CreationTime = 0;
5275         rsp->LastAccessTime = 0;
5276         rsp->LastWriteTime = 0;
5277         rsp->ChangeTime = 0;
5278         rsp->AllocationSize = 0;
5279         rsp->EndOfFile = 0;
5280         rsp->Attributes = 0;
5281         inc_rfc1001_len(work->response_buf, 60);
5282         return 0;
5283 }
5284
5285 /**
5286  * smb2_close() - handler for smb2 close file command
5287  * @work:       smb work containing close request buffer
5288  *
5289  * Return:      0
5290  */
5291 int smb2_close(struct ksmbd_work *work)
5292 {
5293         u64 volatile_id = KSMBD_NO_FID;
5294         u64 sess_id;
5295         struct smb2_close_req *req;
5296         struct smb2_close_rsp *rsp;
5297         struct ksmbd_conn *conn = work->conn;
5298         struct ksmbd_file *fp;
5299         struct inode *inode;
5300         u64 time;
5301         int err = 0;
5302
5303         WORK_BUFFERS(work, req, rsp);
5304
5305         if (test_share_config_flag(work->tcon->share_conf,
5306                                    KSMBD_SHARE_FLAG_PIPE)) {
5307                 ksmbd_debug(SMB, "IPC pipe close request\n");
5308                 return smb2_close_pipe(work);
5309         }
5310
5311         sess_id = le64_to_cpu(req->hdr.SessionId);
5312         if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)
5313                 sess_id = work->compound_sid;
5314
5315         work->compound_sid = 0;
5316         if (check_session_id(conn, sess_id)) {
5317                 work->compound_sid = sess_id;
5318         } else {
5319                 rsp->hdr.Status = STATUS_USER_SESSION_DELETED;
5320                 if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)
5321                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
5322                 err = -EBADF;
5323                 goto out;
5324         }
5325
5326         if (work->next_smb2_rcv_hdr_off &&
5327             !has_file_id(req->VolatileFileId)) {
5328                 if (!has_file_id(work->compound_fid)) {
5329                         /* file already closed, return FILE_CLOSED */
5330                         ksmbd_debug(SMB, "file already closed\n");
5331                         rsp->hdr.Status = STATUS_FILE_CLOSED;
5332                         err = -EBADF;
5333                         goto out;
5334                 } else {
5335                         ksmbd_debug(SMB,
5336                                     "Compound request set FID = %llu:%llu\n",
5337                                     work->compound_fid,
5338                                     work->compound_pfid);
5339                         volatile_id = work->compound_fid;
5340
5341                         /* file closed, stored id is not valid anymore */
5342                         work->compound_fid = KSMBD_NO_FID;
5343                         work->compound_pfid = KSMBD_NO_FID;
5344                 }
5345         } else {
5346                 volatile_id = req->VolatileFileId;
5347         }
5348         ksmbd_debug(SMB, "volatile_id = %llu\n", volatile_id);
5349
5350         rsp->StructureSize = cpu_to_le16(60);
5351         rsp->Reserved = 0;
5352
5353         if (req->Flags == SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB) {
5354                 fp = ksmbd_lookup_fd_fast(work, volatile_id);
5355                 if (!fp) {
5356                         err = -ENOENT;
5357                         goto out;
5358                 }
5359
5360                 inode = file_inode(fp->filp);
5361                 rsp->Flags = SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB;
5362                 rsp->AllocationSize = S_ISDIR(inode->i_mode) ? 0 :
5363                         cpu_to_le64(inode->i_blocks << 9);
5364                 rsp->EndOfFile = cpu_to_le64(inode->i_size);
5365                 rsp->Attributes = fp->f_ci->m_fattr;
5366                 rsp->CreationTime = cpu_to_le64(fp->create_time);
5367                 time = ksmbd_UnixTimeToNT(inode->i_atime);
5368                 rsp->LastAccessTime = cpu_to_le64(time);
5369                 time = ksmbd_UnixTimeToNT(inode->i_mtime);
5370                 rsp->LastWriteTime = cpu_to_le64(time);
5371                 time = ksmbd_UnixTimeToNT(inode->i_ctime);
5372                 rsp->ChangeTime = cpu_to_le64(time);
5373                 ksmbd_fd_put(work, fp);
5374         } else {
5375                 rsp->Flags = 0;
5376                 rsp->AllocationSize = 0;
5377                 rsp->EndOfFile = 0;
5378                 rsp->Attributes = 0;
5379                 rsp->CreationTime = 0;
5380                 rsp->LastAccessTime = 0;
5381                 rsp->LastWriteTime = 0;
5382                 rsp->ChangeTime = 0;
5383         }
5384
5385         err = ksmbd_close_fd(work, volatile_id);
5386 out:
5387         if (err) {
5388                 if (rsp->hdr.Status == 0)
5389                         rsp->hdr.Status = STATUS_FILE_CLOSED;
5390                 smb2_set_err_rsp(work);
5391         } else {
5392                 inc_rfc1001_len(work->response_buf, 60);
5393         }
5394
5395         return 0;
5396 }
5397
5398 /**
5399  * smb2_echo() - handler for smb2 echo(ping) command
5400  * @work:       smb work containing echo request buffer
5401  *
5402  * Return:      0
5403  */
5404 int smb2_echo(struct ksmbd_work *work)
5405 {
5406         struct smb2_echo_rsp *rsp = smb2_get_msg(work->response_buf);
5407
5408         rsp->StructureSize = cpu_to_le16(4);
5409         rsp->Reserved = 0;
5410         inc_rfc1001_len(work->response_buf, 4);
5411         return 0;
5412 }
5413
5414 static int smb2_rename(struct ksmbd_work *work,
5415                        struct ksmbd_file *fp,
5416                        struct user_namespace *user_ns,
5417                        struct smb2_file_rename_info *file_info,
5418                        struct nls_table *local_nls)
5419 {
5420         struct ksmbd_share_config *share = fp->tcon->share_conf;
5421         char *new_name = NULL, *abs_oldname = NULL, *old_name = NULL;
5422         char *pathname = NULL;
5423         struct path path;
5424         bool file_present = true;
5425         int rc;
5426
5427         ksmbd_debug(SMB, "setting FILE_RENAME_INFO\n");
5428         pathname = kmalloc(PATH_MAX, GFP_KERNEL);
5429         if (!pathname)
5430                 return -ENOMEM;
5431
5432         abs_oldname = file_path(fp->filp, pathname, PATH_MAX);
5433         if (IS_ERR(abs_oldname)) {
5434                 rc = -EINVAL;
5435                 goto out;
5436         }
5437         old_name = strrchr(abs_oldname, '/');
5438         if (old_name && old_name[1] != '\0') {
5439                 old_name++;
5440         } else {
5441                 ksmbd_debug(SMB, "can't get last component in path %s\n",
5442                             abs_oldname);
5443                 rc = -ENOENT;
5444                 goto out;
5445         }
5446
5447         new_name = smb2_get_name(file_info->FileName,
5448                                  le32_to_cpu(file_info->FileNameLength),
5449                                  local_nls);
5450         if (IS_ERR(new_name)) {
5451                 rc = PTR_ERR(new_name);
5452                 goto out;
5453         }
5454
5455         if (strchr(new_name, ':')) {
5456                 int s_type;
5457                 char *xattr_stream_name, *stream_name = NULL;
5458                 size_t xattr_stream_size;
5459                 int len;
5460
5461                 rc = parse_stream_name(new_name, &stream_name, &s_type);
5462                 if (rc < 0)
5463                         goto out;
5464
5465                 len = strlen(new_name);
5466                 if (len > 0 && new_name[len - 1] != '/') {
5467                         pr_err("not allow base filename in rename\n");
5468                         rc = -ESHARE;
5469                         goto out;
5470                 }
5471
5472                 rc = ksmbd_vfs_xattr_stream_name(stream_name,
5473                                                  &xattr_stream_name,
5474                                                  &xattr_stream_size,
5475                                                  s_type);
5476                 if (rc)
5477                         goto out;
5478
5479                 rc = ksmbd_vfs_setxattr(user_ns,
5480                                         fp->filp->f_path.dentry,
5481                                         xattr_stream_name,
5482                                         NULL, 0, 0);
5483                 if (rc < 0) {
5484                         pr_err("failed to store stream name in xattr: %d\n",
5485                                rc);
5486                         rc = -EINVAL;
5487                         goto out;
5488                 }
5489
5490                 goto out;
5491         }
5492
5493         ksmbd_debug(SMB, "new name %s\n", new_name);
5494         rc = ksmbd_vfs_kern_path(work, new_name, LOOKUP_NO_SYMLINKS, &path, 1);
5495         if (rc) {
5496                 if (rc != -ENOENT)
5497                         goto out;
5498                 file_present = false;
5499         } else {
5500                 path_put(&path);
5501         }
5502
5503         if (ksmbd_share_veto_filename(share, new_name)) {
5504                 rc = -ENOENT;
5505                 ksmbd_debug(SMB, "Can't rename vetoed file: %s\n", new_name);
5506                 goto out;
5507         }
5508
5509         if (file_info->ReplaceIfExists) {
5510                 if (file_present) {
5511                         rc = ksmbd_vfs_remove_file(work, new_name);
5512                         if (rc) {
5513                                 if (rc != -ENOTEMPTY)
5514                                         rc = -EINVAL;
5515                                 ksmbd_debug(SMB, "cannot delete %s, rc %d\n",
5516                                             new_name, rc);
5517                                 goto out;
5518                         }
5519                 }
5520         } else {
5521                 if (file_present &&
5522                     strncmp(old_name, path.dentry->d_name.name, strlen(old_name))) {
5523                         rc = -EEXIST;
5524                         ksmbd_debug(SMB,
5525                                     "cannot rename already existing file\n");
5526                         goto out;
5527                 }
5528         }
5529
5530         rc = ksmbd_vfs_fp_rename(work, fp, new_name);
5531 out:
5532         kfree(pathname);
5533         if (!IS_ERR(new_name))
5534                 kfree(new_name);
5535         return rc;
5536 }
5537
5538 static int smb2_create_link(struct ksmbd_work *work,
5539                             struct ksmbd_share_config *share,
5540                             struct smb2_file_link_info *file_info,
5541                             unsigned int buf_len, struct file *filp,
5542                             struct nls_table *local_nls)
5543 {
5544         char *link_name = NULL, *target_name = NULL, *pathname = NULL;
5545         struct path path;
5546         bool file_present = true;
5547         int rc;
5548
5549         if (buf_len < (u64)sizeof(struct smb2_file_link_info) +
5550                         le32_to_cpu(file_info->FileNameLength))
5551                 return -EINVAL;
5552
5553         ksmbd_debug(SMB, "setting FILE_LINK_INFORMATION\n");
5554         pathname = kmalloc(PATH_MAX, GFP_KERNEL);
5555         if (!pathname)
5556                 return -ENOMEM;
5557
5558         link_name = smb2_get_name(file_info->FileName,
5559                                   le32_to_cpu(file_info->FileNameLength),
5560                                   local_nls);
5561         if (IS_ERR(link_name) || S_ISDIR(file_inode(filp)->i_mode)) {
5562                 rc = -EINVAL;
5563                 goto out;
5564         }
5565
5566         ksmbd_debug(SMB, "link name is %s\n", link_name);
5567         target_name = file_path(filp, pathname, PATH_MAX);
5568         if (IS_ERR(target_name)) {
5569                 rc = -EINVAL;
5570                 goto out;
5571         }
5572
5573         ksmbd_debug(SMB, "target name is %s\n", target_name);
5574         rc = ksmbd_vfs_kern_path(work, link_name, LOOKUP_NO_SYMLINKS, &path, 0);
5575         if (rc) {
5576                 if (rc != -ENOENT)
5577                         goto out;
5578                 file_present = false;
5579         } else {
5580                 path_put(&path);
5581         }
5582
5583         if (file_info->ReplaceIfExists) {
5584                 if (file_present) {
5585                         rc = ksmbd_vfs_remove_file(work, link_name);
5586                         if (rc) {
5587                                 rc = -EINVAL;
5588                                 ksmbd_debug(SMB, "cannot delete %s\n",
5589                                             link_name);
5590                                 goto out;
5591                         }
5592                 }
5593         } else {
5594                 if (file_present) {
5595                         rc = -EEXIST;
5596                         ksmbd_debug(SMB, "link already exists\n");
5597                         goto out;
5598                 }
5599         }
5600
5601         rc = ksmbd_vfs_link(work, target_name, link_name);
5602         if (rc)
5603                 rc = -EINVAL;
5604 out:
5605         if (!IS_ERR(link_name))
5606                 kfree(link_name);
5607         kfree(pathname);
5608         return rc;
5609 }
5610
5611 static int set_file_basic_info(struct ksmbd_file *fp,
5612                                struct smb2_file_basic_info *file_info,
5613                                struct ksmbd_share_config *share)
5614 {
5615         struct iattr attrs;
5616         struct file *filp;
5617         struct inode *inode;
5618         struct user_namespace *user_ns;
5619         int rc = 0;
5620
5621         if (!(fp->daccess & FILE_WRITE_ATTRIBUTES_LE))
5622                 return -EACCES;
5623
5624         attrs.ia_valid = 0;
5625         filp = fp->filp;
5626         inode = file_inode(filp);
5627         user_ns = file_mnt_user_ns(filp);
5628
5629         if (file_info->CreationTime)
5630                 fp->create_time = le64_to_cpu(file_info->CreationTime);
5631
5632         if (file_info->LastAccessTime) {
5633                 attrs.ia_atime = ksmbd_NTtimeToUnix(file_info->LastAccessTime);
5634                 attrs.ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
5635         }
5636
5637         attrs.ia_valid |= ATTR_CTIME;
5638         if (file_info->ChangeTime)
5639                 attrs.ia_ctime = ksmbd_NTtimeToUnix(file_info->ChangeTime);
5640         else
5641                 attrs.ia_ctime = inode->i_ctime;
5642
5643         if (file_info->LastWriteTime) {
5644                 attrs.ia_mtime = ksmbd_NTtimeToUnix(file_info->LastWriteTime);
5645                 attrs.ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
5646         }
5647
5648         if (file_info->Attributes) {
5649                 if (!S_ISDIR(inode->i_mode) &&
5650                     file_info->Attributes & FILE_ATTRIBUTE_DIRECTORY_LE) {
5651                         pr_err("can't change a file to a directory\n");
5652                         return -EINVAL;
5653                 }
5654
5655                 if (!(S_ISDIR(inode->i_mode) && file_info->Attributes == FILE_ATTRIBUTE_NORMAL_LE))
5656                         fp->f_ci->m_fattr = file_info->Attributes |
5657                                 (fp->f_ci->m_fattr & FILE_ATTRIBUTE_DIRECTORY_LE);
5658         }
5659
5660         if (test_share_config_flag(share, KSMBD_SHARE_FLAG_STORE_DOS_ATTRS) &&
5661             (file_info->CreationTime || file_info->Attributes)) {
5662                 struct xattr_dos_attrib da = {0};
5663
5664                 da.version = 4;
5665                 da.itime = fp->itime;
5666                 da.create_time = fp->create_time;
5667                 da.attr = le32_to_cpu(fp->f_ci->m_fattr);
5668                 da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME |
5669                         XATTR_DOSINFO_ITIME;
5670
5671                 rc = ksmbd_vfs_set_dos_attrib_xattr(user_ns,
5672                                                     filp->f_path.dentry, &da);
5673                 if (rc)
5674                         ksmbd_debug(SMB,
5675                                     "failed to restore file attribute in EA\n");
5676                 rc = 0;
5677         }
5678
5679         if (attrs.ia_valid) {
5680                 struct dentry *dentry = filp->f_path.dentry;
5681                 struct inode *inode = d_inode(dentry);
5682
5683                 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
5684                         return -EACCES;
5685
5686                 inode_lock(inode);
5687                 inode->i_ctime = attrs.ia_ctime;
5688                 attrs.ia_valid &= ~ATTR_CTIME;
5689                 rc = notify_change(user_ns, dentry, &attrs, NULL);
5690                 inode_unlock(inode);
5691         }
5692         return rc;
5693 }
5694
5695 static int set_file_allocation_info(struct ksmbd_work *work,
5696                                     struct ksmbd_file *fp,
5697                                     struct smb2_file_alloc_info *file_alloc_info)
5698 {
5699         /*
5700          * TODO : It's working fine only when store dos attributes
5701          * is not yes. need to implement a logic which works
5702          * properly with any smb.conf option
5703          */
5704
5705         loff_t alloc_blks;
5706         struct inode *inode;
5707         int rc;
5708
5709         if (!(fp->daccess & FILE_WRITE_DATA_LE))
5710                 return -EACCES;
5711
5712         alloc_blks = (le64_to_cpu(file_alloc_info->AllocationSize) + 511) >> 9;
5713         inode = file_inode(fp->filp);
5714
5715         if (alloc_blks > inode->i_blocks) {
5716                 smb_break_all_levII_oplock(work, fp, 1);
5717                 rc = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0,
5718                                    alloc_blks * 512);
5719                 if (rc && rc != -EOPNOTSUPP) {
5720                         pr_err("vfs_fallocate is failed : %d\n", rc);
5721                         return rc;
5722                 }
5723         } else if (alloc_blks < inode->i_blocks) {
5724                 loff_t size;
5725
5726                 /*
5727                  * Allocation size could be smaller than original one
5728                  * which means allocated blocks in file should be
5729                  * deallocated. use truncate to cut out it, but inode
5730                  * size is also updated with truncate offset.
5731                  * inode size is retained by backup inode size.
5732                  */
5733                 size = i_size_read(inode);
5734                 rc = ksmbd_vfs_truncate(work, fp, alloc_blks * 512);
5735                 if (rc) {
5736                         pr_err("truncate failed!, err %d\n", rc);
5737                         return rc;
5738                 }
5739                 if (size < alloc_blks * 512)
5740                         i_size_write(inode, size);
5741         }
5742         return 0;
5743 }
5744
5745 static int set_end_of_file_info(struct ksmbd_work *work, struct ksmbd_file *fp,
5746                                 struct smb2_file_eof_info *file_eof_info)
5747 {
5748         loff_t newsize;
5749         struct inode *inode;
5750         int rc;
5751
5752         if (!(fp->daccess & FILE_WRITE_DATA_LE))
5753                 return -EACCES;
5754
5755         newsize = le64_to_cpu(file_eof_info->EndOfFile);
5756         inode = file_inode(fp->filp);
5757
5758         /*
5759          * If FILE_END_OF_FILE_INFORMATION of set_info_file is called
5760          * on FAT32 shared device, truncate execution time is too long
5761          * and network error could cause from windows client. because
5762          * truncate of some filesystem like FAT32 fill zero data in
5763          * truncated range.
5764          */
5765         if (inode->i_sb->s_magic != MSDOS_SUPER_MAGIC) {
5766                 ksmbd_debug(SMB, "truncated to newsize %lld\n", newsize);
5767                 rc = ksmbd_vfs_truncate(work, fp, newsize);
5768                 if (rc) {
5769                         ksmbd_debug(SMB, "truncate failed!, err %d\n", rc);
5770                         if (rc != -EAGAIN)
5771                                 rc = -EBADF;
5772                         return rc;
5773                 }
5774         }
5775         return 0;
5776 }
5777
5778 static int set_rename_info(struct ksmbd_work *work, struct ksmbd_file *fp,
5779                            struct smb2_file_rename_info *rename_info,
5780                            unsigned int buf_len)
5781 {
5782         struct user_namespace *user_ns;
5783         struct ksmbd_file *parent_fp;
5784         struct dentry *parent;
5785         struct dentry *dentry = fp->filp->f_path.dentry;
5786         int ret;
5787
5788         if (!(fp->daccess & FILE_DELETE_LE)) {
5789                 pr_err("no right to delete : 0x%x\n", fp->daccess);
5790                 return -EACCES;
5791         }
5792
5793         if (buf_len < (u64)sizeof(struct smb2_file_rename_info) +
5794                         le32_to_cpu(rename_info->FileNameLength))
5795                 return -EINVAL;
5796
5797         user_ns = file_mnt_user_ns(fp->filp);
5798         if (ksmbd_stream_fd(fp))
5799                 goto next;
5800
5801         parent = dget_parent(dentry);
5802         ret = ksmbd_vfs_lock_parent(user_ns, parent, dentry);
5803         if (ret) {
5804                 dput(parent);
5805                 return ret;
5806         }
5807
5808         parent_fp = ksmbd_lookup_fd_inode(d_inode(parent));
5809         inode_unlock(d_inode(parent));
5810         dput(parent);
5811
5812         if (parent_fp) {
5813                 if (parent_fp->daccess & FILE_DELETE_LE) {
5814                         pr_err("parent dir is opened with delete access\n");
5815                         ksmbd_fd_put(work, parent_fp);
5816                         return -ESHARE;
5817                 }
5818                 ksmbd_fd_put(work, parent_fp);
5819         }
5820 next:
5821         return smb2_rename(work, fp, user_ns, rename_info,
5822                            work->conn->local_nls);
5823 }
5824
5825 static int set_file_disposition_info(struct ksmbd_file *fp,
5826                                      struct smb2_file_disposition_info *file_info)
5827 {
5828         struct inode *inode;
5829
5830         if (!(fp->daccess & FILE_DELETE_LE)) {
5831                 pr_err("no right to delete : 0x%x\n", fp->daccess);
5832                 return -EACCES;
5833         }
5834
5835         inode = file_inode(fp->filp);
5836         if (file_info->DeletePending) {
5837                 if (S_ISDIR(inode->i_mode) &&
5838                     ksmbd_vfs_empty_dir(fp) == -ENOTEMPTY)
5839                         return -EBUSY;
5840                 ksmbd_set_inode_pending_delete(fp);
5841         } else {
5842                 ksmbd_clear_inode_pending_delete(fp);
5843         }
5844         return 0;
5845 }
5846
5847 static int set_file_position_info(struct ksmbd_file *fp,
5848                                   struct smb2_file_pos_info *file_info)
5849 {
5850         loff_t current_byte_offset;
5851         unsigned long sector_size;
5852         struct inode *inode;
5853
5854         inode = file_inode(fp->filp);
5855         current_byte_offset = le64_to_cpu(file_info->CurrentByteOffset);
5856         sector_size = inode->i_sb->s_blocksize;
5857
5858         if (current_byte_offset < 0 ||
5859             (fp->coption == FILE_NO_INTERMEDIATE_BUFFERING_LE &&
5860              current_byte_offset & (sector_size - 1))) {
5861                 pr_err("CurrentByteOffset is not valid : %llu\n",
5862                        current_byte_offset);
5863                 return -EINVAL;
5864         }
5865
5866         fp->filp->f_pos = current_byte_offset;
5867         return 0;
5868 }
5869
5870 static int set_file_mode_info(struct ksmbd_file *fp,
5871                               struct smb2_file_mode_info *file_info)
5872 {
5873         __le32 mode;
5874
5875         mode = file_info->Mode;
5876
5877         if ((mode & ~FILE_MODE_INFO_MASK)) {
5878                 pr_err("Mode is not valid : 0x%x\n", le32_to_cpu(mode));
5879                 return -EINVAL;
5880         }
5881
5882         /*
5883          * TODO : need to implement consideration for
5884          * FILE_SYNCHRONOUS_IO_ALERT and FILE_SYNCHRONOUS_IO_NONALERT
5885          */
5886         ksmbd_vfs_set_fadvise(fp->filp, mode);
5887         fp->coption = mode;
5888         return 0;
5889 }
5890
5891 /**
5892  * smb2_set_info_file() - handler for smb2 set info command
5893  * @work:       smb work containing set info command buffer
5894  * @fp:         ksmbd_file pointer
5895  * @req:        request buffer pointer
5896  * @share:      ksmbd_share_config pointer
5897  *
5898  * Return:      0 on success, otherwise error
5899  * TODO: need to implement an error handling for STATUS_INFO_LENGTH_MISMATCH
5900  */
5901 static int smb2_set_info_file(struct ksmbd_work *work, struct ksmbd_file *fp,
5902                               struct smb2_set_info_req *req,
5903                               struct ksmbd_share_config *share)
5904 {
5905         unsigned int buf_len = le32_to_cpu(req->BufferLength);
5906
5907         switch (req->FileInfoClass) {
5908         case FILE_BASIC_INFORMATION:
5909         {
5910                 if (buf_len < sizeof(struct smb2_file_basic_info))
5911                         return -EINVAL;
5912
5913                 return set_file_basic_info(fp, (struct smb2_file_basic_info *)req->Buffer, share);
5914         }
5915         case FILE_ALLOCATION_INFORMATION:
5916         {
5917                 if (buf_len < sizeof(struct smb2_file_alloc_info))
5918                         return -EINVAL;
5919
5920                 return set_file_allocation_info(work, fp,
5921                                                 (struct smb2_file_alloc_info *)req->Buffer);
5922         }
5923         case FILE_END_OF_FILE_INFORMATION:
5924         {
5925                 if (buf_len < sizeof(struct smb2_file_eof_info))
5926                         return -EINVAL;
5927
5928                 return set_end_of_file_info(work, fp,
5929                                             (struct smb2_file_eof_info *)req->Buffer);
5930         }
5931         case FILE_RENAME_INFORMATION:
5932         {
5933                 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
5934                         ksmbd_debug(SMB,
5935                                     "User does not have write permission\n");
5936                         return -EACCES;
5937                 }
5938
5939                 if (buf_len < sizeof(struct smb2_file_rename_info))
5940                         return -EINVAL;
5941
5942                 return set_rename_info(work, fp,
5943                                        (struct smb2_file_rename_info *)req->Buffer,
5944                                        buf_len);
5945         }
5946         case FILE_LINK_INFORMATION:
5947         {
5948                 if (buf_len < sizeof(struct smb2_file_link_info))
5949                         return -EINVAL;
5950
5951                 return smb2_create_link(work, work->tcon->share_conf,
5952                                         (struct smb2_file_link_info *)req->Buffer,
5953                                         buf_len, fp->filp,
5954                                         work->conn->local_nls);
5955         }
5956         case FILE_DISPOSITION_INFORMATION:
5957         {
5958                 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
5959                         ksmbd_debug(SMB,
5960                                     "User does not have write permission\n");
5961                         return -EACCES;
5962                 }
5963
5964                 if (buf_len < sizeof(struct smb2_file_disposition_info))
5965                         return -EINVAL;
5966
5967                 return set_file_disposition_info(fp,
5968                                                  (struct smb2_file_disposition_info *)req->Buffer);
5969         }
5970         case FILE_FULL_EA_INFORMATION:
5971         {
5972                 if (!(fp->daccess & FILE_WRITE_EA_LE)) {
5973                         pr_err("Not permitted to write ext  attr: 0x%x\n",
5974                                fp->daccess);
5975                         return -EACCES;
5976                 }
5977
5978                 if (buf_len < sizeof(struct smb2_ea_info))
5979                         return -EINVAL;
5980
5981                 return smb2_set_ea((struct smb2_ea_info *)req->Buffer,
5982                                    buf_len, &fp->filp->f_path);
5983         }
5984         case FILE_POSITION_INFORMATION:
5985         {
5986                 if (buf_len < sizeof(struct smb2_file_pos_info))
5987                         return -EINVAL;
5988
5989                 return set_file_position_info(fp, (struct smb2_file_pos_info *)req->Buffer);
5990         }
5991         case FILE_MODE_INFORMATION:
5992         {
5993                 if (buf_len < sizeof(struct smb2_file_mode_info))
5994                         return -EINVAL;
5995
5996                 return set_file_mode_info(fp, (struct smb2_file_mode_info *)req->Buffer);
5997         }
5998         }
5999
6000         pr_err("Unimplemented Fileinfoclass :%d\n", req->FileInfoClass);
6001         return -EOPNOTSUPP;
6002 }
6003
6004 static int smb2_set_info_sec(struct ksmbd_file *fp, int addition_info,
6005                              char *buffer, int buf_len)
6006 {
6007         struct smb_ntsd *pntsd = (struct smb_ntsd *)buffer;
6008
6009         fp->saccess |= FILE_SHARE_DELETE_LE;
6010
6011         return set_info_sec(fp->conn, fp->tcon, &fp->filp->f_path, pntsd,
6012                         buf_len, false);
6013 }
6014
6015 /**
6016  * smb2_set_info() - handler for smb2 set info command handler
6017  * @work:       smb work containing set info request buffer
6018  *
6019  * Return:      0 on success, otherwise error
6020  */
6021 int smb2_set_info(struct ksmbd_work *work)
6022 {
6023         struct smb2_set_info_req *req;
6024         struct smb2_set_info_rsp *rsp;
6025         struct ksmbd_file *fp;
6026         int rc = 0;
6027         unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
6028
6029         ksmbd_debug(SMB, "Received set info request\n");
6030
6031         if (work->next_smb2_rcv_hdr_off) {
6032                 req = ksmbd_req_buf_next(work);
6033                 rsp = ksmbd_resp_buf_next(work);
6034                 if (!has_file_id(req->VolatileFileId)) {
6035                         ksmbd_debug(SMB, "Compound request set FID = %llu\n",
6036                                     work->compound_fid);
6037                         id = work->compound_fid;
6038                         pid = work->compound_pfid;
6039                 }
6040         } else {
6041                 req = smb2_get_msg(work->request_buf);
6042                 rsp = smb2_get_msg(work->response_buf);
6043         }
6044
6045         if (!has_file_id(id)) {
6046                 id = req->VolatileFileId;
6047                 pid = req->PersistentFileId;
6048         }
6049
6050         fp = ksmbd_lookup_fd_slow(work, id, pid);
6051         if (!fp) {
6052                 ksmbd_debug(SMB, "Invalid id for close: %u\n", id);
6053                 rc = -ENOENT;
6054                 goto err_out;
6055         }
6056
6057         switch (req->InfoType) {
6058         case SMB2_O_INFO_FILE:
6059                 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n");
6060                 rc = smb2_set_info_file(work, fp, req, work->tcon->share_conf);
6061                 break;
6062         case SMB2_O_INFO_SECURITY:
6063                 ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n");
6064                 if (ksmbd_override_fsids(work)) {
6065                         rc = -ENOMEM;
6066                         goto err_out;
6067                 }
6068                 rc = smb2_set_info_sec(fp,
6069                                        le32_to_cpu(req->AdditionalInformation),
6070                                        req->Buffer,
6071                                        le32_to_cpu(req->BufferLength));
6072                 ksmbd_revert_fsids(work);
6073                 break;
6074         default:
6075                 rc = -EOPNOTSUPP;
6076         }
6077
6078         if (rc < 0)
6079                 goto err_out;
6080
6081         rsp->StructureSize = cpu_to_le16(2);
6082         inc_rfc1001_len(work->response_buf, 2);
6083         ksmbd_fd_put(work, fp);
6084         return 0;
6085
6086 err_out:
6087         if (rc == -EACCES || rc == -EPERM || rc == -EXDEV)
6088                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
6089         else if (rc == -EINVAL)
6090                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6091         else if (rc == -ESHARE)
6092                 rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6093         else if (rc == -ENOENT)
6094                 rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID;
6095         else if (rc == -EBUSY || rc == -ENOTEMPTY)
6096                 rsp->hdr.Status = STATUS_DIRECTORY_NOT_EMPTY;
6097         else if (rc == -EAGAIN)
6098                 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6099         else if (rc == -EBADF || rc == -ESTALE)
6100                 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6101         else if (rc == -EEXIST)
6102                 rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION;
6103         else if (rsp->hdr.Status == 0 || rc == -EOPNOTSUPP)
6104                 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
6105         smb2_set_err_rsp(work);
6106         ksmbd_fd_put(work, fp);
6107         ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n", rc);
6108         return rc;
6109 }
6110
6111 /**
6112  * smb2_read_pipe() - handler for smb2 read from IPC pipe
6113  * @work:       smb work containing read IPC pipe command buffer
6114  *
6115  * Return:      0 on success, otherwise error
6116  */
6117 static noinline int smb2_read_pipe(struct ksmbd_work *work)
6118 {
6119         int nbytes = 0, err;
6120         u64 id;
6121         struct ksmbd_rpc_command *rpc_resp;
6122         struct smb2_read_req *req = smb2_get_msg(work->request_buf);
6123         struct smb2_read_rsp *rsp = smb2_get_msg(work->response_buf);
6124
6125         id = req->VolatileFileId;
6126
6127         inc_rfc1001_len(work->response_buf, 16);
6128         rpc_resp = ksmbd_rpc_read(work->sess, id);
6129         if (rpc_resp) {
6130                 if (rpc_resp->flags != KSMBD_RPC_OK) {
6131                         err = -EINVAL;
6132                         goto out;
6133                 }
6134
6135                 work->aux_payload_buf =
6136                         kvmalloc(rpc_resp->payload_sz, GFP_KERNEL | __GFP_ZERO);
6137                 if (!work->aux_payload_buf) {
6138                         err = -ENOMEM;
6139                         goto out;
6140                 }
6141
6142                 memcpy(work->aux_payload_buf, rpc_resp->payload,
6143                        rpc_resp->payload_sz);
6144
6145                 nbytes = rpc_resp->payload_sz;
6146                 work->resp_hdr_sz = get_rfc1002_len(work->response_buf) + 4;
6147                 work->aux_payload_sz = nbytes;
6148                 kvfree(rpc_resp);
6149         }
6150
6151         rsp->StructureSize = cpu_to_le16(17);
6152         rsp->DataOffset = 80;
6153         rsp->Reserved = 0;
6154         rsp->DataLength = cpu_to_le32(nbytes);
6155         rsp->DataRemaining = 0;
6156         rsp->Flags = 0;
6157         inc_rfc1001_len(work->response_buf, nbytes);
6158         return 0;
6159
6160 out:
6161         rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
6162         smb2_set_err_rsp(work);
6163         kvfree(rpc_resp);
6164         return err;
6165 }
6166
6167 static int smb2_set_remote_key_for_rdma(struct ksmbd_work *work,
6168                                         struct smb2_buffer_desc_v1 *desc,
6169                                         __le32 Channel,
6170                                         __le16 ChannelInfoLength)
6171 {
6172         unsigned int i, ch_count;
6173
6174         if (work->conn->dialect == SMB30_PROT_ID &&
6175             Channel != SMB2_CHANNEL_RDMA_V1)
6176                 return -EINVAL;
6177
6178         ch_count = le16_to_cpu(ChannelInfoLength) / sizeof(*desc);
6179         if (ksmbd_debug_types & KSMBD_DEBUG_RDMA) {
6180                 for (i = 0; i < ch_count; i++) {
6181                         pr_info("RDMA r/w request %#x: token %#x, length %#x\n",
6182                                 i,
6183                                 le32_to_cpu(desc[i].token),
6184                                 le32_to_cpu(desc[i].length));
6185                 }
6186         }
6187         if (!ch_count)
6188                 return -EINVAL;
6189
6190         work->need_invalidate_rkey =
6191                 (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE);
6192         if (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE)
6193                 work->remote_key = le32_to_cpu(desc->token);
6194         return 0;
6195 }
6196
6197 static ssize_t smb2_read_rdma_channel(struct ksmbd_work *work,
6198                                       struct smb2_read_req *req, void *data_buf,
6199                                       size_t length)
6200 {
6201         int err;
6202
6203         err = ksmbd_conn_rdma_write(work->conn, data_buf, length,
6204                                     (struct smb2_buffer_desc_v1 *)
6205                                     ((char *)req + le16_to_cpu(req->ReadChannelInfoOffset)),
6206                                     le16_to_cpu(req->ReadChannelInfoLength));
6207         if (err)
6208                 return err;
6209
6210         return length;
6211 }
6212
6213 /**
6214  * smb2_read() - handler for smb2 read from file
6215  * @work:       smb work containing read command buffer
6216  *
6217  * Return:      0 on success, otherwise error
6218  */
6219 int smb2_read(struct ksmbd_work *work)
6220 {
6221         struct ksmbd_conn *conn = work->conn;
6222         struct smb2_read_req *req;
6223         struct smb2_read_rsp *rsp;
6224         struct ksmbd_file *fp = NULL;
6225         loff_t offset;
6226         size_t length, mincount;
6227         ssize_t nbytes = 0, remain_bytes = 0;
6228         int err = 0;
6229         bool is_rdma_channel = false;
6230         unsigned int max_read_size = conn->vals->max_read_size;
6231
6232         WORK_BUFFERS(work, req, rsp);
6233
6234         if (test_share_config_flag(work->tcon->share_conf,
6235                                    KSMBD_SHARE_FLAG_PIPE)) {
6236                 ksmbd_debug(SMB, "IPC pipe read request\n");
6237                 return smb2_read_pipe(work);
6238         }
6239
6240         if (req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE ||
6241             req->Channel == SMB2_CHANNEL_RDMA_V1) {
6242                 is_rdma_channel = true;
6243                 max_read_size = get_smbd_max_read_write_size();
6244         }
6245
6246         if (is_rdma_channel == true) {
6247                 unsigned int ch_offset = le16_to_cpu(req->ReadChannelInfoOffset);
6248
6249                 if (ch_offset < offsetof(struct smb2_read_req, Buffer)) {
6250                         err = -EINVAL;
6251                         goto out;
6252                 }
6253                 err = smb2_set_remote_key_for_rdma(work,
6254                                                    (struct smb2_buffer_desc_v1 *)
6255                                                    ((char *)req + ch_offset),
6256                                                    req->Channel,
6257                                                    req->ReadChannelInfoLength);
6258                 if (err)
6259                         goto out;
6260         }
6261
6262         fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
6263         if (!fp) {
6264                 err = -ENOENT;
6265                 goto out;
6266         }
6267
6268         if (!(fp->daccess & (FILE_READ_DATA_LE | FILE_READ_ATTRIBUTES_LE))) {
6269                 pr_err("Not permitted to read : 0x%x\n", fp->daccess);
6270                 err = -EACCES;
6271                 goto out;
6272         }
6273
6274         offset = le64_to_cpu(req->Offset);
6275         length = le32_to_cpu(req->Length);
6276         mincount = le32_to_cpu(req->MinimumCount);
6277
6278         if (length > max_read_size) {
6279                 ksmbd_debug(SMB, "limiting read size to max size(%u)\n",
6280                             max_read_size);
6281                 err = -EINVAL;
6282                 goto out;
6283         }
6284
6285         ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n",
6286                     fp->filp, offset, length);
6287
6288         work->aux_payload_buf = kvmalloc(length, GFP_KERNEL | __GFP_ZERO);
6289         if (!work->aux_payload_buf) {
6290                 err = -ENOMEM;
6291                 goto out;
6292         }
6293
6294         nbytes = ksmbd_vfs_read(work, fp, length, &offset);
6295         if (nbytes < 0) {
6296                 err = nbytes;
6297                 goto out;
6298         }
6299
6300         if ((nbytes == 0 && length != 0) || nbytes < mincount) {
6301                 kvfree(work->aux_payload_buf);
6302                 work->aux_payload_buf = NULL;
6303                 rsp->hdr.Status = STATUS_END_OF_FILE;
6304                 smb2_set_err_rsp(work);
6305                 ksmbd_fd_put(work, fp);
6306                 return 0;
6307         }
6308
6309         ksmbd_debug(SMB, "nbytes %zu, offset %lld mincount %zu\n",
6310                     nbytes, offset, mincount);
6311
6312         if (is_rdma_channel == true) {
6313                 /* write data to the client using rdma channel */
6314                 remain_bytes = smb2_read_rdma_channel(work, req,
6315                                                       work->aux_payload_buf,
6316                                                       nbytes);
6317                 kvfree(work->aux_payload_buf);
6318                 work->aux_payload_buf = NULL;
6319
6320                 nbytes = 0;
6321                 if (remain_bytes < 0) {
6322                         err = (int)remain_bytes;
6323                         goto out;
6324                 }
6325         }
6326
6327         rsp->StructureSize = cpu_to_le16(17);
6328         rsp->DataOffset = 80;
6329         rsp->Reserved = 0;
6330         rsp->DataLength = cpu_to_le32(nbytes);
6331         rsp->DataRemaining = cpu_to_le32(remain_bytes);
6332         rsp->Flags = 0;
6333         inc_rfc1001_len(work->response_buf, 16);
6334         work->resp_hdr_sz = get_rfc1002_len(work->response_buf) + 4;
6335         work->aux_payload_sz = nbytes;
6336         inc_rfc1001_len(work->response_buf, nbytes);
6337         ksmbd_fd_put(work, fp);
6338         return 0;
6339
6340 out:
6341         if (err) {
6342                 if (err == -EISDIR)
6343                         rsp->hdr.Status = STATUS_INVALID_DEVICE_REQUEST;
6344                 else if (err == -EAGAIN)
6345                         rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6346                 else if (err == -ENOENT)
6347                         rsp->hdr.Status = STATUS_FILE_CLOSED;
6348                 else if (err == -EACCES)
6349                         rsp->hdr.Status = STATUS_ACCESS_DENIED;
6350                 else if (err == -ESHARE)
6351                         rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6352                 else if (err == -EINVAL)
6353                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6354                 else
6355                         rsp->hdr.Status = STATUS_INVALID_HANDLE;
6356
6357                 smb2_set_err_rsp(work);
6358         }
6359         ksmbd_fd_put(work, fp);
6360         return err;
6361 }
6362
6363 /**
6364  * smb2_write_pipe() - handler for smb2 write on IPC pipe
6365  * @work:       smb work containing write IPC pipe command buffer
6366  *
6367  * Return:      0 on success, otherwise error
6368  */
6369 static noinline int smb2_write_pipe(struct ksmbd_work *work)
6370 {
6371         struct smb2_write_req *req = smb2_get_msg(work->request_buf);
6372         struct smb2_write_rsp *rsp = smb2_get_msg(work->response_buf);
6373         struct ksmbd_rpc_command *rpc_resp;
6374         u64 id = 0;
6375         int err = 0, ret = 0;
6376         char *data_buf;
6377         size_t length;
6378
6379         length = le32_to_cpu(req->Length);
6380         id = req->VolatileFileId;
6381
6382         if ((u64)le16_to_cpu(req->DataOffset) + length >
6383             get_rfc1002_len(work->request_buf)) {
6384                 pr_err("invalid write data offset %u, smb_len %u\n",
6385                        le16_to_cpu(req->DataOffset),
6386                        get_rfc1002_len(work->request_buf));
6387                 err = -EINVAL;
6388                 goto out;
6389         }
6390
6391         data_buf = (char *)(((char *)&req->hdr.ProtocolId) +
6392                            le16_to_cpu(req->DataOffset));
6393
6394         rpc_resp = ksmbd_rpc_write(work->sess, id, data_buf, length);
6395         if (rpc_resp) {
6396                 if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) {
6397                         rsp->hdr.Status = STATUS_NOT_SUPPORTED;
6398                         kvfree(rpc_resp);
6399                         smb2_set_err_rsp(work);
6400                         return -EOPNOTSUPP;
6401                 }
6402                 if (rpc_resp->flags != KSMBD_RPC_OK) {
6403                         rsp->hdr.Status = STATUS_INVALID_HANDLE;
6404                         smb2_set_err_rsp(work);
6405                         kvfree(rpc_resp);
6406                         return ret;
6407                 }
6408                 kvfree(rpc_resp);
6409         }
6410
6411         rsp->StructureSize = cpu_to_le16(17);
6412         rsp->DataOffset = 0;
6413         rsp->Reserved = 0;
6414         rsp->DataLength = cpu_to_le32(length);
6415         rsp->DataRemaining = 0;
6416         rsp->Reserved2 = 0;
6417         inc_rfc1001_len(work->response_buf, 16);
6418         return 0;
6419 out:
6420         if (err) {
6421                 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6422                 smb2_set_err_rsp(work);
6423         }
6424
6425         return err;
6426 }
6427
6428 static ssize_t smb2_write_rdma_channel(struct ksmbd_work *work,
6429                                        struct smb2_write_req *req,
6430                                        struct ksmbd_file *fp,
6431                                        loff_t offset, size_t length, bool sync)
6432 {
6433         char *data_buf;
6434         int ret;
6435         ssize_t nbytes;
6436
6437         data_buf = kvmalloc(length, GFP_KERNEL | __GFP_ZERO);
6438         if (!data_buf)
6439                 return -ENOMEM;
6440
6441         ret = ksmbd_conn_rdma_read(work->conn, data_buf, length,
6442                                    (struct smb2_buffer_desc_v1 *)
6443                                    ((char *)req + le16_to_cpu(req->WriteChannelInfoOffset)),
6444                                    le16_to_cpu(req->WriteChannelInfoLength));
6445         if (ret < 0) {
6446                 kvfree(data_buf);
6447                 return ret;
6448         }
6449
6450         ret = ksmbd_vfs_write(work, fp, data_buf, length, &offset, sync, &nbytes);
6451         kvfree(data_buf);
6452         if (ret < 0)
6453                 return ret;
6454
6455         return nbytes;
6456 }
6457
6458 /**
6459  * smb2_write() - handler for smb2 write from file
6460  * @work:       smb work containing write command buffer
6461  *
6462  * Return:      0 on success, otherwise error
6463  */
6464 int smb2_write(struct ksmbd_work *work)
6465 {
6466         struct smb2_write_req *req;
6467         struct smb2_write_rsp *rsp;
6468         struct ksmbd_file *fp = NULL;
6469         loff_t offset;
6470         size_t length;
6471         ssize_t nbytes;
6472         char *data_buf;
6473         bool writethrough = false, is_rdma_channel = false;
6474         int err = 0;
6475         unsigned int max_write_size = work->conn->vals->max_write_size;
6476
6477         WORK_BUFFERS(work, req, rsp);
6478
6479         if (test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_PIPE)) {
6480                 ksmbd_debug(SMB, "IPC pipe write request\n");
6481                 return smb2_write_pipe(work);
6482         }
6483
6484         offset = le64_to_cpu(req->Offset);
6485         length = le32_to_cpu(req->Length);
6486
6487         if (req->Channel == SMB2_CHANNEL_RDMA_V1 ||
6488             req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE) {
6489                 is_rdma_channel = true;
6490                 max_write_size = get_smbd_max_read_write_size();
6491                 length = le32_to_cpu(req->RemainingBytes);
6492         }
6493
6494         if (is_rdma_channel == true) {
6495                 unsigned int ch_offset = le16_to_cpu(req->WriteChannelInfoOffset);
6496
6497                 if (req->Length != 0 || req->DataOffset != 0 ||
6498                     ch_offset < offsetof(struct smb2_write_req, Buffer)) {
6499                         err = -EINVAL;
6500                         goto out;
6501                 }
6502                 err = smb2_set_remote_key_for_rdma(work,
6503                                                    (struct smb2_buffer_desc_v1 *)
6504                                                    ((char *)req + ch_offset),
6505                                                    req->Channel,
6506                                                    req->WriteChannelInfoLength);
6507                 if (err)
6508                         goto out;
6509         }
6510
6511         if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
6512                 ksmbd_debug(SMB, "User does not have write permission\n");
6513                 err = -EACCES;
6514                 goto out;
6515         }
6516
6517         fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
6518         if (!fp) {
6519                 err = -ENOENT;
6520                 goto out;
6521         }
6522
6523         if (!(fp->daccess & (FILE_WRITE_DATA_LE | FILE_READ_ATTRIBUTES_LE))) {
6524                 pr_err("Not permitted to write : 0x%x\n", fp->daccess);
6525                 err = -EACCES;
6526                 goto out;
6527         }
6528
6529         if (length > max_write_size) {
6530                 ksmbd_debug(SMB, "limiting write size to max size(%u)\n",
6531                             max_write_size);
6532                 err = -EINVAL;
6533                 goto out;
6534         }
6535
6536         ksmbd_debug(SMB, "flags %u\n", le32_to_cpu(req->Flags));
6537         if (le32_to_cpu(req->Flags) & SMB2_WRITEFLAG_WRITE_THROUGH)
6538                 writethrough = true;
6539
6540         if (is_rdma_channel == false) {
6541                 if (le16_to_cpu(req->DataOffset) <
6542                     offsetof(struct smb2_write_req, Buffer)) {
6543                         err = -EINVAL;
6544                         goto out;
6545                 }
6546
6547                 data_buf = (char *)(((char *)&req->hdr.ProtocolId) +
6548                                     le16_to_cpu(req->DataOffset));
6549
6550                 ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n",
6551                             fp->filp, offset, length);
6552                 err = ksmbd_vfs_write(work, fp, data_buf, length, &offset,
6553                                       writethrough, &nbytes);
6554                 if (err < 0)
6555                         goto out;
6556         } else {
6557                 /* read data from the client using rdma channel, and
6558                  * write the data.
6559                  */
6560                 nbytes = smb2_write_rdma_channel(work, req, fp, offset, length,
6561                                                  writethrough);
6562                 if (nbytes < 0) {
6563                         err = (int)nbytes;
6564                         goto out;
6565                 }
6566         }
6567
6568         rsp->StructureSize = cpu_to_le16(17);
6569         rsp->DataOffset = 0;
6570         rsp->Reserved = 0;
6571         rsp->DataLength = cpu_to_le32(nbytes);
6572         rsp->DataRemaining = 0;
6573         rsp->Reserved2 = 0;
6574         inc_rfc1001_len(work->response_buf, 16);
6575         ksmbd_fd_put(work, fp);
6576         return 0;
6577
6578 out:
6579         if (err == -EAGAIN)
6580                 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6581         else if (err == -ENOSPC || err == -EFBIG)
6582                 rsp->hdr.Status = STATUS_DISK_FULL;
6583         else if (err == -ENOENT)
6584                 rsp->hdr.Status = STATUS_FILE_CLOSED;
6585         else if (err == -EACCES)
6586                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
6587         else if (err == -ESHARE)
6588                 rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6589         else if (err == -EINVAL)
6590                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6591         else
6592                 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6593
6594         smb2_set_err_rsp(work);
6595         ksmbd_fd_put(work, fp);
6596         return err;
6597 }
6598
6599 /**
6600  * smb2_flush() - handler for smb2 flush file - fsync
6601  * @work:       smb work containing flush command buffer
6602  *
6603  * Return:      0 on success, otherwise error
6604  */
6605 int smb2_flush(struct ksmbd_work *work)
6606 {
6607         struct smb2_flush_req *req;
6608         struct smb2_flush_rsp *rsp;
6609         int err;
6610
6611         WORK_BUFFERS(work, req, rsp);
6612
6613         ksmbd_debug(SMB, "SMB2_FLUSH called for fid %llu\n", req->VolatileFileId);
6614
6615         err = ksmbd_vfs_fsync(work, req->VolatileFileId, req->PersistentFileId);
6616         if (err)
6617                 goto out;
6618
6619         rsp->StructureSize = cpu_to_le16(4);
6620         rsp->Reserved = 0;
6621         inc_rfc1001_len(work->response_buf, 4);
6622         return 0;
6623
6624 out:
6625         if (err) {
6626                 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6627                 smb2_set_err_rsp(work);
6628         }
6629
6630         return err;
6631 }
6632
6633 /**
6634  * smb2_cancel() - handler for smb2 cancel command
6635  * @work:       smb work containing cancel command buffer
6636  *
6637  * Return:      0 on success, otherwise error
6638  */
6639 int smb2_cancel(struct ksmbd_work *work)
6640 {
6641         struct ksmbd_conn *conn = work->conn;
6642         struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
6643         struct smb2_hdr *chdr;
6644         struct ksmbd_work *cancel_work = NULL, *iter;
6645         struct list_head *command_list;
6646
6647         ksmbd_debug(SMB, "smb2 cancel called on mid %llu, async flags 0x%x\n",
6648                     hdr->MessageId, hdr->Flags);
6649
6650         if (hdr->Flags & SMB2_FLAGS_ASYNC_COMMAND) {
6651                 command_list = &conn->async_requests;
6652
6653                 spin_lock(&conn->request_lock);
6654                 list_for_each_entry(iter, command_list,
6655                                     async_request_entry) {
6656                         chdr = smb2_get_msg(iter->request_buf);
6657
6658                         if (iter->async_id !=
6659                             le64_to_cpu(hdr->Id.AsyncId))
6660                                 continue;
6661
6662                         ksmbd_debug(SMB,
6663                                     "smb2 with AsyncId %llu cancelled command = 0x%x\n",
6664                                     le64_to_cpu(hdr->Id.AsyncId),
6665                                     le16_to_cpu(chdr->Command));
6666                         cancel_work = iter;
6667                         break;
6668                 }
6669                 spin_unlock(&conn->request_lock);
6670         } else {
6671                 command_list = &conn->requests;
6672
6673                 spin_lock(&conn->request_lock);
6674                 list_for_each_entry(iter, command_list, request_entry) {
6675                         chdr = smb2_get_msg(iter->request_buf);
6676
6677                         if (chdr->MessageId != hdr->MessageId ||
6678                             iter == work)
6679                                 continue;
6680
6681                         ksmbd_debug(SMB,
6682                                     "smb2 with mid %llu cancelled command = 0x%x\n",
6683                                     le64_to_cpu(hdr->MessageId),
6684                                     le16_to_cpu(chdr->Command));
6685                         cancel_work = iter;
6686                         break;
6687                 }
6688                 spin_unlock(&conn->request_lock);
6689         }
6690
6691         if (cancel_work) {
6692                 cancel_work->state = KSMBD_WORK_CANCELLED;
6693                 if (cancel_work->cancel_fn)
6694                         cancel_work->cancel_fn(cancel_work->cancel_argv);
6695         }
6696
6697         /* For SMB2_CANCEL command itself send no response*/
6698         work->send_no_response = 1;
6699         return 0;
6700 }
6701
6702 struct file_lock *smb_flock_init(struct file *f)
6703 {
6704         struct file_lock *fl;
6705
6706         fl = locks_alloc_lock();
6707         if (!fl)
6708                 goto out;
6709
6710         locks_init_lock(fl);
6711
6712         fl->fl_owner = f;
6713         fl->fl_pid = current->tgid;
6714         fl->fl_file = f;
6715         fl->fl_flags = FL_POSIX;
6716         fl->fl_ops = NULL;
6717         fl->fl_lmops = NULL;
6718
6719 out:
6720         return fl;
6721 }
6722
6723 static int smb2_set_flock_flags(struct file_lock *flock, int flags)
6724 {
6725         int cmd = -EINVAL;
6726
6727         /* Checking for wrong flag combination during lock request*/
6728         switch (flags) {
6729         case SMB2_LOCKFLAG_SHARED:
6730                 ksmbd_debug(SMB, "received shared request\n");
6731                 cmd = F_SETLKW;
6732                 flock->fl_type = F_RDLCK;
6733                 flock->fl_flags |= FL_SLEEP;
6734                 break;
6735         case SMB2_LOCKFLAG_EXCLUSIVE:
6736                 ksmbd_debug(SMB, "received exclusive request\n");
6737                 cmd = F_SETLKW;
6738                 flock->fl_type = F_WRLCK;
6739                 flock->fl_flags |= FL_SLEEP;
6740                 break;
6741         case SMB2_LOCKFLAG_SHARED | SMB2_LOCKFLAG_FAIL_IMMEDIATELY:
6742                 ksmbd_debug(SMB,
6743                             "received shared & fail immediately request\n");
6744                 cmd = F_SETLK;
6745                 flock->fl_type = F_RDLCK;
6746                 break;
6747         case SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_FAIL_IMMEDIATELY:
6748                 ksmbd_debug(SMB,
6749                             "received exclusive & fail immediately request\n");
6750                 cmd = F_SETLK;
6751                 flock->fl_type = F_WRLCK;
6752                 break;
6753         case SMB2_LOCKFLAG_UNLOCK:
6754                 ksmbd_debug(SMB, "received unlock request\n");
6755                 flock->fl_type = F_UNLCK;
6756                 cmd = F_SETLK;
6757                 break;
6758         }
6759
6760         return cmd;
6761 }
6762
6763 static struct ksmbd_lock *smb2_lock_init(struct file_lock *flock,
6764                                          unsigned int cmd, int flags,
6765                                          struct list_head *lock_list)
6766 {
6767         struct ksmbd_lock *lock;
6768
6769         lock = kzalloc(sizeof(struct ksmbd_lock), GFP_KERNEL);
6770         if (!lock)
6771                 return NULL;
6772
6773         lock->cmd = cmd;
6774         lock->fl = flock;
6775         lock->start = flock->fl_start;
6776         lock->end = flock->fl_end;
6777         lock->flags = flags;
6778         if (lock->start == lock->end)
6779                 lock->zero_len = 1;
6780         INIT_LIST_HEAD(&lock->clist);
6781         INIT_LIST_HEAD(&lock->flist);
6782         INIT_LIST_HEAD(&lock->llist);
6783         list_add_tail(&lock->llist, lock_list);
6784
6785         return lock;
6786 }
6787
6788 static void smb2_remove_blocked_lock(void **argv)
6789 {
6790         struct file_lock *flock = (struct file_lock *)argv[0];
6791
6792         ksmbd_vfs_posix_lock_unblock(flock);
6793         wake_up(&flock->fl_wait);
6794 }
6795
6796 static inline bool lock_defer_pending(struct file_lock *fl)
6797 {
6798         /* check pending lock waiters */
6799         return waitqueue_active(&fl->fl_wait);
6800 }
6801
6802 /**
6803  * smb2_lock() - handler for smb2 file lock command
6804  * @work:       smb work containing lock command buffer
6805  *
6806  * Return:      0 on success, otherwise error
6807  */
6808 int smb2_lock(struct ksmbd_work *work)
6809 {
6810         struct smb2_lock_req *req = smb2_get_msg(work->request_buf);
6811         struct smb2_lock_rsp *rsp = smb2_get_msg(work->response_buf);
6812         struct smb2_lock_element *lock_ele;
6813         struct ksmbd_file *fp = NULL;
6814         struct file_lock *flock = NULL;
6815         struct file *filp = NULL;
6816         int lock_count;
6817         int flags = 0;
6818         int cmd = 0;
6819         int err = -EIO, i, rc = 0;
6820         u64 lock_start, lock_length;
6821         struct ksmbd_lock *smb_lock = NULL, *cmp_lock, *tmp, *tmp2;
6822         struct ksmbd_conn *conn;
6823         int nolock = 0;
6824         LIST_HEAD(lock_list);
6825         LIST_HEAD(rollback_list);
6826         int prior_lock = 0;
6827
6828         ksmbd_debug(SMB, "Received lock request\n");
6829         fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
6830         if (!fp) {
6831                 ksmbd_debug(SMB, "Invalid file id for lock : %llu\n", req->VolatileFileId);
6832                 err = -ENOENT;
6833                 goto out2;
6834         }
6835
6836         filp = fp->filp;
6837         lock_count = le16_to_cpu(req->LockCount);
6838         lock_ele = req->locks;
6839
6840         ksmbd_debug(SMB, "lock count is %d\n", lock_count);
6841         if (!lock_count) {
6842                 err = -EINVAL;
6843                 goto out2;
6844         }
6845
6846         for (i = 0; i < lock_count; i++) {
6847                 flags = le32_to_cpu(lock_ele[i].Flags);
6848
6849                 flock = smb_flock_init(filp);
6850                 if (!flock)
6851                         goto out;
6852
6853                 cmd = smb2_set_flock_flags(flock, flags);
6854
6855                 lock_start = le64_to_cpu(lock_ele[i].Offset);
6856                 lock_length = le64_to_cpu(lock_ele[i].Length);
6857                 if (lock_start > U64_MAX - lock_length) {
6858                         pr_err("Invalid lock range requested\n");
6859                         rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE;
6860                         locks_free_lock(flock);
6861                         goto out;
6862                 }
6863
6864                 if (lock_start > OFFSET_MAX)
6865                         flock->fl_start = OFFSET_MAX;
6866                 else
6867                         flock->fl_start = lock_start;
6868
6869                 lock_length = le64_to_cpu(lock_ele[i].Length);
6870                 if (lock_length > OFFSET_MAX - flock->fl_start)
6871                         lock_length = OFFSET_MAX - flock->fl_start;
6872
6873                 flock->fl_end = flock->fl_start + lock_length;
6874
6875                 if (flock->fl_end < flock->fl_start) {
6876                         ksmbd_debug(SMB,
6877                                     "the end offset(%llx) is smaller than the start offset(%llx)\n",
6878                                     flock->fl_end, flock->fl_start);
6879                         rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE;
6880                         locks_free_lock(flock);
6881                         goto out;
6882                 }
6883
6884                 /* Check conflict locks in one request */
6885                 list_for_each_entry(cmp_lock, &lock_list, llist) {
6886                         if (cmp_lock->fl->fl_start <= flock->fl_start &&
6887                             cmp_lock->fl->fl_end >= flock->fl_end) {
6888                                 if (cmp_lock->fl->fl_type != F_UNLCK &&
6889                                     flock->fl_type != F_UNLCK) {
6890                                         pr_err("conflict two locks in one request\n");
6891                                         err = -EINVAL;
6892                                         locks_free_lock(flock);
6893                                         goto out;
6894                                 }
6895                         }
6896                 }
6897
6898                 smb_lock = smb2_lock_init(flock, cmd, flags, &lock_list);
6899                 if (!smb_lock) {
6900                         err = -EINVAL;
6901                         locks_free_lock(flock);
6902                         goto out;
6903                 }
6904         }
6905
6906         list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) {
6907                 if (smb_lock->cmd < 0) {
6908                         err = -EINVAL;
6909                         goto out;
6910                 }
6911
6912                 if (!(smb_lock->flags & SMB2_LOCKFLAG_MASK)) {
6913                         err = -EINVAL;
6914                         goto out;
6915                 }
6916
6917                 if ((prior_lock & (SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_SHARED) &&
6918                      smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) ||
6919                     (prior_lock == SMB2_LOCKFLAG_UNLOCK &&
6920                      !(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK))) {
6921                         err = -EINVAL;
6922                         goto out;
6923                 }
6924
6925                 prior_lock = smb_lock->flags;
6926
6927                 if (!(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) &&
6928                     !(smb_lock->flags & SMB2_LOCKFLAG_FAIL_IMMEDIATELY))
6929                         goto no_check_cl;
6930
6931                 nolock = 1;
6932                 /* check locks in connection list */
6933                 read_lock(&conn_list_lock);
6934                 list_for_each_entry(conn, &conn_list, conns_list) {
6935                         spin_lock(&conn->llist_lock);
6936                         list_for_each_entry_safe(cmp_lock, tmp2, &conn->lock_list, clist) {
6937                                 if (file_inode(cmp_lock->fl->fl_file) !=
6938                                     file_inode(smb_lock->fl->fl_file))
6939                                         continue;
6940
6941                                 if (smb_lock->fl->fl_type == F_UNLCK) {
6942                                         if (cmp_lock->fl->fl_file == smb_lock->fl->fl_file &&
6943                                             cmp_lock->start == smb_lock->start &&
6944                                             cmp_lock->end == smb_lock->end &&
6945                                             !lock_defer_pending(cmp_lock->fl)) {
6946                                                 nolock = 0;
6947                                                 list_del(&cmp_lock->flist);
6948                                                 list_del(&cmp_lock->clist);
6949                                                 spin_unlock(&conn->llist_lock);
6950                                                 read_unlock(&conn_list_lock);
6951
6952                                                 locks_free_lock(cmp_lock->fl);
6953                                                 kfree(cmp_lock);
6954                                                 goto out_check_cl;
6955                                         }
6956                                         continue;
6957                                 }
6958
6959                                 if (cmp_lock->fl->fl_file == smb_lock->fl->fl_file) {
6960                                         if (smb_lock->flags & SMB2_LOCKFLAG_SHARED)
6961                                                 continue;
6962                                 } else {
6963                                         if (cmp_lock->flags & SMB2_LOCKFLAG_SHARED)
6964                                                 continue;
6965                                 }
6966
6967                                 /* check zero byte lock range */
6968                                 if (cmp_lock->zero_len && !smb_lock->zero_len &&
6969                                     cmp_lock->start > smb_lock->start &&
6970                                     cmp_lock->start < smb_lock->end) {
6971                                         spin_unlock(&conn->llist_lock);
6972                                         read_unlock(&conn_list_lock);
6973                                         pr_err("previous lock conflict with zero byte lock range\n");
6974                                         goto out;
6975                                 }
6976
6977                                 if (smb_lock->zero_len && !cmp_lock->zero_len &&
6978                                     smb_lock->start > cmp_lock->start &&
6979                                     smb_lock->start < cmp_lock->end) {
6980                                         spin_unlock(&conn->llist_lock);
6981                                         read_unlock(&conn_list_lock);
6982                                         pr_err("current lock conflict with zero byte lock range\n");
6983                                         goto out;
6984                                 }
6985
6986                                 if (((cmp_lock->start <= smb_lock->start &&
6987                                       cmp_lock->end > smb_lock->start) ||
6988                                      (cmp_lock->start < smb_lock->end &&
6989                                       cmp_lock->end >= smb_lock->end)) &&
6990                                     !cmp_lock->zero_len && !smb_lock->zero_len) {
6991                                         spin_unlock(&conn->llist_lock);
6992                                         read_unlock(&conn_list_lock);
6993                                         pr_err("Not allow lock operation on exclusive lock range\n");
6994                                         goto out;
6995                                 }
6996                         }
6997                         spin_unlock(&conn->llist_lock);
6998                 }
6999                 read_unlock(&conn_list_lock);
7000 out_check_cl:
7001                 if (smb_lock->fl->fl_type == F_UNLCK && nolock) {
7002                         pr_err("Try to unlock nolocked range\n");
7003                         rsp->hdr.Status = STATUS_RANGE_NOT_LOCKED;
7004                         goto out;
7005                 }
7006
7007 no_check_cl:
7008                 if (smb_lock->zero_len) {
7009                         err = 0;
7010                         goto skip;
7011                 }
7012
7013                 flock = smb_lock->fl;
7014                 list_del(&smb_lock->llist);
7015 retry:
7016                 rc = vfs_lock_file(filp, smb_lock->cmd, flock, NULL);
7017 skip:
7018                 if (flags & SMB2_LOCKFLAG_UNLOCK) {
7019                         if (!rc) {
7020                                 ksmbd_debug(SMB, "File unlocked\n");
7021                         } else if (rc == -ENOENT) {
7022                                 rsp->hdr.Status = STATUS_NOT_LOCKED;
7023                                 goto out;
7024                         }
7025                         locks_free_lock(flock);
7026                         kfree(smb_lock);
7027                 } else {
7028                         if (rc == FILE_LOCK_DEFERRED) {
7029                                 void **argv;
7030
7031                                 ksmbd_debug(SMB,
7032                                             "would have to wait for getting lock\n");
7033                                 spin_lock(&work->conn->llist_lock);
7034                                 list_add_tail(&smb_lock->clist,
7035                                               &work->conn->lock_list);
7036                                 spin_unlock(&work->conn->llist_lock);
7037                                 list_add(&smb_lock->llist, &rollback_list);
7038
7039                                 argv = kmalloc(sizeof(void *), GFP_KERNEL);
7040                                 if (!argv) {
7041                                         err = -ENOMEM;
7042                                         goto out;
7043                                 }
7044                                 argv[0] = flock;
7045
7046                                 rc = setup_async_work(work,
7047                                                       smb2_remove_blocked_lock,
7048                                                       argv);
7049                                 if (rc) {
7050                                         err = -ENOMEM;
7051                                         goto out;
7052                                 }
7053                                 spin_lock(&fp->f_lock);
7054                                 list_add(&work->fp_entry, &fp->blocked_works);
7055                                 spin_unlock(&fp->f_lock);
7056
7057                                 smb2_send_interim_resp(work, STATUS_PENDING);
7058
7059                                 ksmbd_vfs_posix_lock_wait(flock);
7060
7061                                 if (work->state != KSMBD_WORK_ACTIVE) {
7062                                         list_del(&smb_lock->llist);
7063                                         spin_lock(&work->conn->llist_lock);
7064                                         list_del(&smb_lock->clist);
7065                                         spin_unlock(&work->conn->llist_lock);
7066                                         locks_free_lock(flock);
7067
7068                                         if (work->state == KSMBD_WORK_CANCELLED) {
7069                                                 spin_lock(&fp->f_lock);
7070                                                 list_del(&work->fp_entry);
7071                                                 spin_unlock(&fp->f_lock);
7072                                                 rsp->hdr.Status =
7073                                                         STATUS_CANCELLED;
7074                                                 kfree(smb_lock);
7075                                                 smb2_send_interim_resp(work,
7076                                                                        STATUS_CANCELLED);
7077                                                 work->send_no_response = 1;
7078                                                 goto out;
7079                                         }
7080                                         init_smb2_rsp_hdr(work);
7081                                         smb2_set_err_rsp(work);
7082                                         rsp->hdr.Status =
7083                                                 STATUS_RANGE_NOT_LOCKED;
7084                                         kfree(smb_lock);
7085                                         goto out2;
7086                                 }
7087
7088                                 list_del(&smb_lock->llist);
7089                                 spin_lock(&work->conn->llist_lock);
7090                                 list_del(&smb_lock->clist);
7091                                 spin_unlock(&work->conn->llist_lock);
7092
7093                                 spin_lock(&fp->f_lock);
7094                                 list_del(&work->fp_entry);
7095                                 spin_unlock(&fp->f_lock);
7096                                 goto retry;
7097                         } else if (!rc) {
7098                                 spin_lock(&work->conn->llist_lock);
7099                                 list_add_tail(&smb_lock->clist,
7100                                               &work->conn->lock_list);
7101                                 list_add_tail(&smb_lock->flist,
7102                                               &fp->lock_list);
7103                                 spin_unlock(&work->conn->llist_lock);
7104                                 list_add(&smb_lock->llist, &rollback_list);
7105                                 ksmbd_debug(SMB, "successful in taking lock\n");
7106                         } else {
7107                                 goto out;
7108                         }
7109                 }
7110         }
7111
7112         if (atomic_read(&fp->f_ci->op_count) > 1)
7113                 smb_break_all_oplock(work, fp);
7114
7115         rsp->StructureSize = cpu_to_le16(4);
7116         ksmbd_debug(SMB, "successful in taking lock\n");
7117         rsp->hdr.Status = STATUS_SUCCESS;
7118         rsp->Reserved = 0;
7119         inc_rfc1001_len(work->response_buf, 4);
7120         ksmbd_fd_put(work, fp);
7121         return 0;
7122
7123 out:
7124         list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) {
7125                 locks_free_lock(smb_lock->fl);
7126                 list_del(&smb_lock->llist);
7127                 kfree(smb_lock);
7128         }
7129
7130         list_for_each_entry_safe(smb_lock, tmp, &rollback_list, llist) {
7131                 struct file_lock *rlock = NULL;
7132
7133                 rlock = smb_flock_init(filp);
7134                 rlock->fl_type = F_UNLCK;
7135                 rlock->fl_start = smb_lock->start;
7136                 rlock->fl_end = smb_lock->end;
7137
7138                 rc = vfs_lock_file(filp, F_SETLK, rlock, NULL);
7139                 if (rc)
7140                         pr_err("rollback unlock fail : %d\n", rc);
7141
7142                 list_del(&smb_lock->llist);
7143                 spin_lock(&work->conn->llist_lock);
7144                 if (!list_empty(&smb_lock->flist))
7145                         list_del(&smb_lock->flist);
7146                 list_del(&smb_lock->clist);
7147                 spin_unlock(&work->conn->llist_lock);
7148
7149                 locks_free_lock(smb_lock->fl);
7150                 locks_free_lock(rlock);
7151                 kfree(smb_lock);
7152         }
7153 out2:
7154         ksmbd_debug(SMB, "failed in taking lock(flags : %x), err : %d\n", flags, err);
7155
7156         if (!rsp->hdr.Status) {
7157                 if (err == -EINVAL)
7158                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7159                 else if (err == -ENOMEM)
7160                         rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
7161                 else if (err == -ENOENT)
7162                         rsp->hdr.Status = STATUS_FILE_CLOSED;
7163                 else
7164                         rsp->hdr.Status = STATUS_LOCK_NOT_GRANTED;
7165         }
7166
7167         smb2_set_err_rsp(work);
7168         ksmbd_fd_put(work, fp);
7169         return err;
7170 }
7171
7172 static int fsctl_copychunk(struct ksmbd_work *work,
7173                            struct copychunk_ioctl_req *ci_req,
7174                            unsigned int cnt_code,
7175                            unsigned int input_count,
7176                            unsigned long long volatile_id,
7177                            unsigned long long persistent_id,
7178                            struct smb2_ioctl_rsp *rsp)
7179 {
7180         struct copychunk_ioctl_rsp *ci_rsp;
7181         struct ksmbd_file *src_fp = NULL, *dst_fp = NULL;
7182         struct srv_copychunk *chunks;
7183         unsigned int i, chunk_count, chunk_count_written = 0;
7184         unsigned int chunk_size_written = 0;
7185         loff_t total_size_written = 0;
7186         int ret = 0;
7187
7188         ci_rsp = (struct copychunk_ioctl_rsp *)&rsp->Buffer[0];
7189
7190         rsp->VolatileFileId = volatile_id;
7191         rsp->PersistentFileId = persistent_id;
7192         ci_rsp->ChunksWritten =
7193                 cpu_to_le32(ksmbd_server_side_copy_max_chunk_count());
7194         ci_rsp->ChunkBytesWritten =
7195                 cpu_to_le32(ksmbd_server_side_copy_max_chunk_size());
7196         ci_rsp->TotalBytesWritten =
7197                 cpu_to_le32(ksmbd_server_side_copy_max_total_size());
7198
7199         chunks = (struct srv_copychunk *)&ci_req->Chunks[0];
7200         chunk_count = le32_to_cpu(ci_req->ChunkCount);
7201         if (chunk_count == 0)
7202                 goto out;
7203         total_size_written = 0;
7204
7205         /* verify the SRV_COPYCHUNK_COPY packet */
7206         if (chunk_count > ksmbd_server_side_copy_max_chunk_count() ||
7207             input_count < offsetof(struct copychunk_ioctl_req, Chunks) +
7208              chunk_count * sizeof(struct srv_copychunk)) {
7209                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7210                 return -EINVAL;
7211         }
7212
7213         for (i = 0; i < chunk_count; i++) {
7214                 if (le32_to_cpu(chunks[i].Length) == 0 ||
7215                     le32_to_cpu(chunks[i].Length) > ksmbd_server_side_copy_max_chunk_size())
7216                         break;
7217                 total_size_written += le32_to_cpu(chunks[i].Length);
7218         }
7219
7220         if (i < chunk_count ||
7221             total_size_written > ksmbd_server_side_copy_max_total_size()) {
7222                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7223                 return -EINVAL;
7224         }
7225
7226         src_fp = ksmbd_lookup_foreign_fd(work,
7227                                          le64_to_cpu(ci_req->ResumeKey[0]));
7228         dst_fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id);
7229         ret = -EINVAL;
7230         if (!src_fp ||
7231             src_fp->persistent_id != le64_to_cpu(ci_req->ResumeKey[1])) {
7232                 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
7233                 goto out;
7234         }
7235
7236         if (!dst_fp) {
7237                 rsp->hdr.Status = STATUS_FILE_CLOSED;
7238                 goto out;
7239         }
7240
7241         /*
7242          * FILE_READ_DATA should only be included in
7243          * the FSCTL_COPYCHUNK case
7244          */
7245         if (cnt_code == FSCTL_COPYCHUNK &&
7246             !(dst_fp->daccess & (FILE_READ_DATA_LE | FILE_GENERIC_READ_LE))) {
7247                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
7248                 goto out;
7249         }
7250
7251         ret = ksmbd_vfs_copy_file_ranges(work, src_fp, dst_fp,
7252                                          chunks, chunk_count,
7253                                          &chunk_count_written,
7254                                          &chunk_size_written,
7255                                          &total_size_written);
7256         if (ret < 0) {
7257                 if (ret == -EACCES)
7258                         rsp->hdr.Status = STATUS_ACCESS_DENIED;
7259                 if (ret == -EAGAIN)
7260                         rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
7261                 else if (ret == -EBADF)
7262                         rsp->hdr.Status = STATUS_INVALID_HANDLE;
7263                 else if (ret == -EFBIG || ret == -ENOSPC)
7264                         rsp->hdr.Status = STATUS_DISK_FULL;
7265                 else if (ret == -EINVAL)
7266                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7267                 else if (ret == -EISDIR)
7268                         rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
7269                 else if (ret == -E2BIG)
7270                         rsp->hdr.Status = STATUS_INVALID_VIEW_SIZE;
7271                 else
7272                         rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
7273         }
7274
7275         ci_rsp->ChunksWritten = cpu_to_le32(chunk_count_written);
7276         ci_rsp->ChunkBytesWritten = cpu_to_le32(chunk_size_written);
7277         ci_rsp->TotalBytesWritten = cpu_to_le32(total_size_written);
7278 out:
7279         ksmbd_fd_put(work, src_fp);
7280         ksmbd_fd_put(work, dst_fp);
7281         return ret;
7282 }
7283
7284 static __be32 idev_ipv4_address(struct in_device *idev)
7285 {
7286         __be32 addr = 0;
7287
7288         struct in_ifaddr *ifa;
7289
7290         rcu_read_lock();
7291         in_dev_for_each_ifa_rcu(ifa, idev) {
7292                 if (ifa->ifa_flags & IFA_F_SECONDARY)
7293                         continue;
7294
7295                 addr = ifa->ifa_address;
7296                 break;
7297         }
7298         rcu_read_unlock();
7299         return addr;
7300 }
7301
7302 static int fsctl_query_iface_info_ioctl(struct ksmbd_conn *conn,
7303                                         struct smb2_ioctl_rsp *rsp,
7304                                         unsigned int out_buf_len)
7305 {
7306         struct network_interface_info_ioctl_rsp *nii_rsp = NULL;
7307         int nbytes = 0;
7308         struct net_device *netdev;
7309         struct sockaddr_storage_rsp *sockaddr_storage;
7310         unsigned int flags;
7311         unsigned long long speed;
7312
7313         rtnl_lock();
7314         for_each_netdev(&init_net, netdev) {
7315                 bool ipv4_set = false;
7316
7317                 if (netdev->type == ARPHRD_LOOPBACK)
7318                         continue;
7319
7320                 flags = dev_get_flags(netdev);
7321                 if (!(flags & IFF_RUNNING))
7322                         continue;
7323 ipv6_retry:
7324                 if (out_buf_len <
7325                     nbytes + sizeof(struct network_interface_info_ioctl_rsp)) {
7326                         rtnl_unlock();
7327                         return -ENOSPC;
7328                 }
7329
7330                 nii_rsp = (struct network_interface_info_ioctl_rsp *)
7331                                 &rsp->Buffer[nbytes];
7332                 nii_rsp->IfIndex = cpu_to_le32(netdev->ifindex);
7333
7334                 nii_rsp->Capability = 0;
7335                 if (netdev->real_num_tx_queues > 1)
7336                         nii_rsp->Capability |= cpu_to_le32(RSS_CAPABLE);
7337                 if (ksmbd_rdma_capable_netdev(netdev))
7338                         nii_rsp->Capability |= cpu_to_le32(RDMA_CAPABLE);
7339
7340                 nii_rsp->Next = cpu_to_le32(152);
7341                 nii_rsp->Reserved = 0;
7342
7343                 if (netdev->ethtool_ops->get_link_ksettings) {
7344                         struct ethtool_link_ksettings cmd;
7345
7346                         netdev->ethtool_ops->get_link_ksettings(netdev, &cmd);
7347                         speed = cmd.base.speed;
7348                 } else {
7349                         ksmbd_debug(SMB, "%s %s\n", netdev->name,
7350                                     "speed is unknown, defaulting to 1Gb/sec");
7351                         speed = SPEED_1000;
7352                 }
7353
7354                 speed *= 1000000;
7355                 nii_rsp->LinkSpeed = cpu_to_le64(speed);
7356
7357                 sockaddr_storage = (struct sockaddr_storage_rsp *)
7358                                         nii_rsp->SockAddr_Storage;
7359                 memset(sockaddr_storage, 0, 128);
7360
7361                 if (!ipv4_set) {
7362                         struct in_device *idev;
7363
7364                         sockaddr_storage->Family = cpu_to_le16(INTERNETWORK);
7365                         sockaddr_storage->addr4.Port = 0;
7366
7367                         idev = __in_dev_get_rtnl(netdev);
7368                         if (!idev)
7369                                 continue;
7370                         sockaddr_storage->addr4.IPv4address =
7371                                                 idev_ipv4_address(idev);
7372                         nbytes += sizeof(struct network_interface_info_ioctl_rsp);
7373                         ipv4_set = true;
7374                         goto ipv6_retry;
7375                 } else {
7376                         struct inet6_dev *idev6;
7377                         struct inet6_ifaddr *ifa;
7378                         __u8 *ipv6_addr = sockaddr_storage->addr6.IPv6address;
7379
7380                         sockaddr_storage->Family = cpu_to_le16(INTERNETWORKV6);
7381                         sockaddr_storage->addr6.Port = 0;
7382                         sockaddr_storage->addr6.FlowInfo = 0;
7383
7384                         idev6 = __in6_dev_get(netdev);
7385                         if (!idev6)
7386                                 continue;
7387
7388                         list_for_each_entry(ifa, &idev6->addr_list, if_list) {
7389                                 if (ifa->flags & (IFA_F_TENTATIVE |
7390                                                         IFA_F_DEPRECATED))
7391                                         continue;
7392                                 memcpy(ipv6_addr, ifa->addr.s6_addr, 16);
7393                                 break;
7394                         }
7395                         sockaddr_storage->addr6.ScopeId = 0;
7396                         nbytes += sizeof(struct network_interface_info_ioctl_rsp);
7397                 }
7398         }
7399         rtnl_unlock();
7400
7401         /* zero if this is last one */
7402         if (nii_rsp)
7403                 nii_rsp->Next = 0;
7404
7405         rsp->PersistentFileId = SMB2_NO_FID;
7406         rsp->VolatileFileId = SMB2_NO_FID;
7407         return nbytes;
7408 }
7409
7410 static int fsctl_validate_negotiate_info(struct ksmbd_conn *conn,
7411                                          struct validate_negotiate_info_req *neg_req,
7412                                          struct validate_negotiate_info_rsp *neg_rsp,
7413                                          unsigned int in_buf_len)
7414 {
7415         int ret = 0;
7416         int dialect;
7417
7418         if (in_buf_len < offsetof(struct validate_negotiate_info_req, Dialects) +
7419                         le16_to_cpu(neg_req->DialectCount) * sizeof(__le16))
7420                 return -EINVAL;
7421
7422         dialect = ksmbd_lookup_dialect_by_id(neg_req->Dialects,
7423                                              neg_req->DialectCount);
7424         if (dialect == BAD_PROT_ID || dialect != conn->dialect) {
7425                 ret = -EINVAL;
7426                 goto err_out;
7427         }
7428
7429         if (strncmp(neg_req->Guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE)) {
7430                 ret = -EINVAL;
7431                 goto err_out;
7432         }
7433
7434         if (le16_to_cpu(neg_req->SecurityMode) != conn->cli_sec_mode) {
7435                 ret = -EINVAL;
7436                 goto err_out;
7437         }
7438
7439         if (le32_to_cpu(neg_req->Capabilities) != conn->cli_cap) {
7440                 ret = -EINVAL;
7441                 goto err_out;
7442         }
7443
7444         neg_rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
7445         memset(neg_rsp->Guid, 0, SMB2_CLIENT_GUID_SIZE);
7446         neg_rsp->SecurityMode = cpu_to_le16(conn->srv_sec_mode);
7447         neg_rsp->Dialect = cpu_to_le16(conn->dialect);
7448 err_out:
7449         return ret;
7450 }
7451
7452 static int fsctl_query_allocated_ranges(struct ksmbd_work *work, u64 id,
7453                                         struct file_allocated_range_buffer *qar_req,
7454                                         struct file_allocated_range_buffer *qar_rsp,
7455                                         unsigned int in_count, unsigned int *out_count)
7456 {
7457         struct ksmbd_file *fp;
7458         loff_t start, length;
7459         int ret = 0;
7460
7461         *out_count = 0;
7462         if (in_count == 0)
7463                 return -EINVAL;
7464
7465         fp = ksmbd_lookup_fd_fast(work, id);
7466         if (!fp)
7467                 return -ENOENT;
7468
7469         start = le64_to_cpu(qar_req->file_offset);
7470         length = le64_to_cpu(qar_req->length);
7471
7472         ret = ksmbd_vfs_fqar_lseek(fp, start, length,
7473                                    qar_rsp, in_count, out_count);
7474         if (ret && ret != -E2BIG)
7475                 *out_count = 0;
7476
7477         ksmbd_fd_put(work, fp);
7478         return ret;
7479 }
7480
7481 static int fsctl_pipe_transceive(struct ksmbd_work *work, u64 id,
7482                                  unsigned int out_buf_len,
7483                                  struct smb2_ioctl_req *req,
7484                                  struct smb2_ioctl_rsp *rsp)
7485 {
7486         struct ksmbd_rpc_command *rpc_resp;
7487         char *data_buf = (char *)&req->Buffer[0];
7488         int nbytes = 0;
7489
7490         rpc_resp = ksmbd_rpc_ioctl(work->sess, id, data_buf,
7491                                    le32_to_cpu(req->InputCount));
7492         if (rpc_resp) {
7493                 if (rpc_resp->flags == KSMBD_RPC_SOME_NOT_MAPPED) {
7494                         /*
7495                          * set STATUS_SOME_NOT_MAPPED response
7496                          * for unknown domain sid.
7497                          */
7498                         rsp->hdr.Status = STATUS_SOME_NOT_MAPPED;
7499                 } else if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) {
7500                         rsp->hdr.Status = STATUS_NOT_SUPPORTED;
7501                         goto out;
7502                 } else if (rpc_resp->flags != KSMBD_RPC_OK) {
7503                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7504                         goto out;
7505                 }
7506
7507                 nbytes = rpc_resp->payload_sz;
7508                 if (rpc_resp->payload_sz > out_buf_len) {
7509                         rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;
7510                         nbytes = out_buf_len;
7511                 }
7512
7513                 if (!rpc_resp->payload_sz) {
7514                         rsp->hdr.Status =
7515                                 STATUS_UNEXPECTED_IO_ERROR;
7516                         goto out;
7517                 }
7518
7519                 memcpy((char *)rsp->Buffer, rpc_resp->payload, nbytes);
7520         }
7521 out:
7522         kvfree(rpc_resp);
7523         return nbytes;
7524 }
7525
7526 static inline int fsctl_set_sparse(struct ksmbd_work *work, u64 id,
7527                                    struct file_sparse *sparse)
7528 {
7529         struct ksmbd_file *fp;
7530         struct user_namespace *user_ns;
7531         int ret = 0;
7532         __le32 old_fattr;
7533
7534         fp = ksmbd_lookup_fd_fast(work, id);
7535         if (!fp)
7536                 return -ENOENT;
7537         user_ns = file_mnt_user_ns(fp->filp);
7538
7539         old_fattr = fp->f_ci->m_fattr;
7540         if (sparse->SetSparse)
7541                 fp->f_ci->m_fattr |= FILE_ATTRIBUTE_SPARSE_FILE_LE;
7542         else
7543                 fp->f_ci->m_fattr &= ~FILE_ATTRIBUTE_SPARSE_FILE_LE;
7544
7545         if (fp->f_ci->m_fattr != old_fattr &&
7546             test_share_config_flag(work->tcon->share_conf,
7547                                    KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) {
7548                 struct xattr_dos_attrib da;
7549
7550                 ret = ksmbd_vfs_get_dos_attrib_xattr(user_ns,
7551                                                      fp->filp->f_path.dentry, &da);
7552                 if (ret <= 0)
7553                         goto out;
7554
7555                 da.attr = le32_to_cpu(fp->f_ci->m_fattr);
7556                 ret = ksmbd_vfs_set_dos_attrib_xattr(user_ns,
7557                                                      fp->filp->f_path.dentry, &da);
7558                 if (ret)
7559                         fp->f_ci->m_fattr = old_fattr;
7560         }
7561
7562 out:
7563         ksmbd_fd_put(work, fp);
7564         return ret;
7565 }
7566
7567 static int fsctl_request_resume_key(struct ksmbd_work *work,
7568                                     struct smb2_ioctl_req *req,
7569                                     struct resume_key_ioctl_rsp *key_rsp)
7570 {
7571         struct ksmbd_file *fp;
7572
7573         fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
7574         if (!fp)
7575                 return -ENOENT;
7576
7577         memset(key_rsp, 0, sizeof(*key_rsp));
7578         key_rsp->ResumeKey[0] = req->VolatileFileId;
7579         key_rsp->ResumeKey[1] = req->PersistentFileId;
7580         ksmbd_fd_put(work, fp);
7581
7582         return 0;
7583 }
7584
7585 /**
7586  * smb2_ioctl() - handler for smb2 ioctl command
7587  * @work:       smb work containing ioctl command buffer
7588  *
7589  * Return:      0 on success, otherwise error
7590  */
7591 int smb2_ioctl(struct ksmbd_work *work)
7592 {
7593         struct smb2_ioctl_req *req;
7594         struct smb2_ioctl_rsp *rsp;
7595         unsigned int cnt_code, nbytes = 0, out_buf_len, in_buf_len;
7596         u64 id = KSMBD_NO_FID;
7597         struct ksmbd_conn *conn = work->conn;
7598         int ret = 0;
7599
7600         if (work->next_smb2_rcv_hdr_off) {
7601                 req = ksmbd_req_buf_next(work);
7602                 rsp = ksmbd_resp_buf_next(work);
7603                 if (!has_file_id(req->VolatileFileId)) {
7604                         ksmbd_debug(SMB, "Compound request set FID = %llu\n",
7605                                     work->compound_fid);
7606                         id = work->compound_fid;
7607                 }
7608         } else {
7609                 req = smb2_get_msg(work->request_buf);
7610                 rsp = smb2_get_msg(work->response_buf);
7611         }
7612
7613         if (!has_file_id(id))
7614                 id = req->VolatileFileId;
7615
7616         if (req->Flags != cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL)) {
7617                 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
7618                 goto out;
7619         }
7620
7621         cnt_code = le32_to_cpu(req->CtlCode);
7622         ret = smb2_calc_max_out_buf_len(work, 48,
7623                                         le32_to_cpu(req->MaxOutputResponse));
7624         if (ret < 0) {
7625                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7626                 goto out;
7627         }
7628         out_buf_len = (unsigned int)ret;
7629         in_buf_len = le32_to_cpu(req->InputCount);
7630
7631         switch (cnt_code) {
7632         case FSCTL_DFS_GET_REFERRALS:
7633         case FSCTL_DFS_GET_REFERRALS_EX:
7634                 /* Not support DFS yet */
7635                 rsp->hdr.Status = STATUS_FS_DRIVER_REQUIRED;
7636                 goto out;
7637         case FSCTL_CREATE_OR_GET_OBJECT_ID:
7638         {
7639                 struct file_object_buf_type1_ioctl_rsp *obj_buf;
7640
7641                 nbytes = sizeof(struct file_object_buf_type1_ioctl_rsp);
7642                 obj_buf = (struct file_object_buf_type1_ioctl_rsp *)
7643                         &rsp->Buffer[0];
7644
7645                 /*
7646                  * TODO: This is dummy implementation to pass smbtorture
7647                  * Need to check correct response later
7648                  */
7649                 memset(obj_buf->ObjectId, 0x0, 16);
7650                 memset(obj_buf->BirthVolumeId, 0x0, 16);
7651                 memset(obj_buf->BirthObjectId, 0x0, 16);
7652                 memset(obj_buf->DomainId, 0x0, 16);
7653
7654                 break;
7655         }
7656         case FSCTL_PIPE_TRANSCEIVE:
7657                 out_buf_len = min_t(u32, KSMBD_IPC_MAX_PAYLOAD, out_buf_len);
7658                 nbytes = fsctl_pipe_transceive(work, id, out_buf_len, req, rsp);
7659                 break;
7660         case FSCTL_VALIDATE_NEGOTIATE_INFO:
7661                 if (conn->dialect < SMB30_PROT_ID) {
7662                         ret = -EOPNOTSUPP;
7663                         goto out;
7664                 }
7665
7666                 if (in_buf_len < offsetof(struct validate_negotiate_info_req,
7667                                           Dialects)) {
7668                         ret = -EINVAL;
7669                         goto out;
7670                 }
7671
7672                 if (out_buf_len < sizeof(struct validate_negotiate_info_rsp)) {
7673                         ret = -EINVAL;
7674                         goto out;
7675                 }
7676
7677                 ret = fsctl_validate_negotiate_info(conn,
7678                         (struct validate_negotiate_info_req *)&req->Buffer[0],
7679                         (struct validate_negotiate_info_rsp *)&rsp->Buffer[0],
7680                         in_buf_len);
7681                 if (ret < 0)
7682                         goto out;
7683
7684                 nbytes = sizeof(struct validate_negotiate_info_rsp);
7685                 rsp->PersistentFileId = SMB2_NO_FID;
7686                 rsp->VolatileFileId = SMB2_NO_FID;
7687                 break;
7688         case FSCTL_QUERY_NETWORK_INTERFACE_INFO:
7689                 ret = fsctl_query_iface_info_ioctl(conn, rsp, out_buf_len);
7690                 if (ret < 0)
7691                         goto out;
7692                 nbytes = ret;
7693                 break;
7694         case FSCTL_REQUEST_RESUME_KEY:
7695                 if (out_buf_len < sizeof(struct resume_key_ioctl_rsp)) {
7696                         ret = -EINVAL;
7697                         goto out;
7698                 }
7699
7700                 ret = fsctl_request_resume_key(work, req,
7701                                                (struct resume_key_ioctl_rsp *)&rsp->Buffer[0]);
7702                 if (ret < 0)
7703                         goto out;
7704                 rsp->PersistentFileId = req->PersistentFileId;
7705                 rsp->VolatileFileId = req->VolatileFileId;
7706                 nbytes = sizeof(struct resume_key_ioctl_rsp);
7707                 break;
7708         case FSCTL_COPYCHUNK:
7709         case FSCTL_COPYCHUNK_WRITE:
7710                 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
7711                         ksmbd_debug(SMB,
7712                                     "User does not have write permission\n");
7713                         ret = -EACCES;
7714                         goto out;
7715                 }
7716
7717                 if (in_buf_len < sizeof(struct copychunk_ioctl_req)) {
7718                         ret = -EINVAL;
7719                         goto out;
7720                 }
7721
7722                 if (out_buf_len < sizeof(struct copychunk_ioctl_rsp)) {
7723                         ret = -EINVAL;
7724                         goto out;
7725                 }
7726
7727                 nbytes = sizeof(struct copychunk_ioctl_rsp);
7728                 rsp->VolatileFileId = req->VolatileFileId;
7729                 rsp->PersistentFileId = req->PersistentFileId;
7730                 fsctl_copychunk(work,
7731                                 (struct copychunk_ioctl_req *)&req->Buffer[0],
7732                                 le32_to_cpu(req->CtlCode),
7733                                 le32_to_cpu(req->InputCount),
7734                                 req->VolatileFileId,
7735                                 req->PersistentFileId,
7736                                 rsp);
7737                 break;
7738         case FSCTL_SET_SPARSE:
7739                 if (in_buf_len < sizeof(struct file_sparse)) {
7740                         ret = -EINVAL;
7741                         goto out;
7742                 }
7743
7744                 ret = fsctl_set_sparse(work, id,
7745                                        (struct file_sparse *)&req->Buffer[0]);
7746                 if (ret < 0)
7747                         goto out;
7748                 break;
7749         case FSCTL_SET_ZERO_DATA:
7750         {
7751                 struct file_zero_data_information *zero_data;
7752                 struct ksmbd_file *fp;
7753                 loff_t off, len, bfz;
7754
7755                 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
7756                         ksmbd_debug(SMB,
7757                                     "User does not have write permission\n");
7758                         ret = -EACCES;
7759                         goto out;
7760                 }
7761
7762                 if (in_buf_len < sizeof(struct file_zero_data_information)) {
7763                         ret = -EINVAL;
7764                         goto out;
7765                 }
7766
7767                 zero_data =
7768                         (struct file_zero_data_information *)&req->Buffer[0];
7769
7770                 off = le64_to_cpu(zero_data->FileOffset);
7771                 bfz = le64_to_cpu(zero_data->BeyondFinalZero);
7772                 if (off > bfz) {
7773                         ret = -EINVAL;
7774                         goto out;
7775                 }
7776
7777                 len = bfz - off;
7778                 if (len) {
7779                         fp = ksmbd_lookup_fd_fast(work, id);
7780                         if (!fp) {
7781                                 ret = -ENOENT;
7782                                 goto out;
7783                         }
7784
7785                         ret = ksmbd_vfs_zero_data(work, fp, off, len);
7786                         ksmbd_fd_put(work, fp);
7787                         if (ret < 0)
7788                                 goto out;
7789                 }
7790                 break;
7791         }
7792         case FSCTL_QUERY_ALLOCATED_RANGES:
7793                 if (in_buf_len < sizeof(struct file_allocated_range_buffer)) {
7794                         ret = -EINVAL;
7795                         goto out;
7796                 }
7797
7798                 ret = fsctl_query_allocated_ranges(work, id,
7799                         (struct file_allocated_range_buffer *)&req->Buffer[0],
7800                         (struct file_allocated_range_buffer *)&rsp->Buffer[0],
7801                         out_buf_len /
7802                         sizeof(struct file_allocated_range_buffer), &nbytes);
7803                 if (ret == -E2BIG) {
7804                         rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;
7805                 } else if (ret < 0) {
7806                         nbytes = 0;
7807                         goto out;
7808                 }
7809
7810                 nbytes *= sizeof(struct file_allocated_range_buffer);
7811                 break;
7812         case FSCTL_GET_REPARSE_POINT:
7813         {
7814                 struct reparse_data_buffer *reparse_ptr;
7815                 struct ksmbd_file *fp;
7816
7817                 reparse_ptr = (struct reparse_data_buffer *)&rsp->Buffer[0];
7818                 fp = ksmbd_lookup_fd_fast(work, id);
7819                 if (!fp) {
7820                         pr_err("not found fp!!\n");
7821                         ret = -ENOENT;
7822                         goto out;
7823                 }
7824
7825                 reparse_ptr->ReparseTag =
7826                         smb2_get_reparse_tag_special_file(file_inode(fp->filp)->i_mode);
7827                 reparse_ptr->ReparseDataLength = 0;
7828                 ksmbd_fd_put(work, fp);
7829                 nbytes = sizeof(struct reparse_data_buffer);
7830                 break;
7831         }
7832         case FSCTL_DUPLICATE_EXTENTS_TO_FILE:
7833         {
7834                 struct ksmbd_file *fp_in, *fp_out = NULL;
7835                 struct duplicate_extents_to_file *dup_ext;
7836                 loff_t src_off, dst_off, length, cloned;
7837
7838                 if (in_buf_len < sizeof(struct duplicate_extents_to_file)) {
7839                         ret = -EINVAL;
7840                         goto out;
7841                 }
7842
7843                 dup_ext = (struct duplicate_extents_to_file *)&req->Buffer[0];
7844
7845                 fp_in = ksmbd_lookup_fd_slow(work, dup_ext->VolatileFileHandle,
7846                                              dup_ext->PersistentFileHandle);
7847                 if (!fp_in) {
7848                         pr_err("not found file handle in duplicate extent to file\n");
7849                         ret = -ENOENT;
7850                         goto out;
7851                 }
7852
7853                 fp_out = ksmbd_lookup_fd_fast(work, id);
7854                 if (!fp_out) {
7855                         pr_err("not found fp\n");
7856                         ret = -ENOENT;
7857                         goto dup_ext_out;
7858                 }
7859
7860                 src_off = le64_to_cpu(dup_ext->SourceFileOffset);
7861                 dst_off = le64_to_cpu(dup_ext->TargetFileOffset);
7862                 length = le64_to_cpu(dup_ext->ByteCount);
7863                 /*
7864                  * XXX: It is not clear if FSCTL_DUPLICATE_EXTENTS_TO_FILE
7865                  * should fall back to vfs_copy_file_range().  This could be
7866                  * beneficial when re-exporting nfs/smb mount, but note that
7867                  * this can result in partial copy that returns an error status.
7868                  * If/when FSCTL_DUPLICATE_EXTENTS_TO_FILE_EX is implemented,
7869                  * fall back to vfs_copy_file_range(), should be avoided when
7870                  * the flag DUPLICATE_EXTENTS_DATA_EX_SOURCE_ATOMIC is set.
7871                  */
7872                 cloned = vfs_clone_file_range(fp_in->filp, src_off,
7873                                               fp_out->filp, dst_off, length, 0);
7874                 if (cloned == -EXDEV || cloned == -EOPNOTSUPP) {
7875                         ret = -EOPNOTSUPP;
7876                         goto dup_ext_out;
7877                 } else if (cloned != length) {
7878                         cloned = vfs_copy_file_range(fp_in->filp, src_off,
7879                                                      fp_out->filp, dst_off,
7880                                                      length, 0);
7881                         if (cloned != length) {
7882                                 if (cloned < 0)
7883                                         ret = cloned;
7884                                 else
7885                                         ret = -EINVAL;
7886                         }
7887                 }
7888
7889 dup_ext_out:
7890                 ksmbd_fd_put(work, fp_in);
7891                 ksmbd_fd_put(work, fp_out);
7892                 if (ret < 0)
7893                         goto out;
7894                 break;
7895         }
7896         default:
7897                 ksmbd_debug(SMB, "not implemented yet ioctl command 0x%x\n",
7898                             cnt_code);
7899                 ret = -EOPNOTSUPP;
7900                 goto out;
7901         }
7902
7903         rsp->CtlCode = cpu_to_le32(cnt_code);
7904         rsp->InputCount = cpu_to_le32(0);
7905         rsp->InputOffset = cpu_to_le32(112);
7906         rsp->OutputOffset = cpu_to_le32(112);
7907         rsp->OutputCount = cpu_to_le32(nbytes);
7908         rsp->StructureSize = cpu_to_le16(49);
7909         rsp->Reserved = cpu_to_le16(0);
7910         rsp->Flags = cpu_to_le32(0);
7911         rsp->Reserved2 = cpu_to_le32(0);
7912         inc_rfc1001_len(work->response_buf, 48 + nbytes);
7913
7914         return 0;
7915
7916 out:
7917         if (ret == -EACCES)
7918                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
7919         else if (ret == -ENOENT)
7920                 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
7921         else if (ret == -EOPNOTSUPP)
7922                 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
7923         else if (ret == -ENOSPC)
7924                 rsp->hdr.Status = STATUS_BUFFER_TOO_SMALL;
7925         else if (ret < 0 || rsp->hdr.Status == 0)
7926                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7927         smb2_set_err_rsp(work);
7928         return 0;
7929 }
7930
7931 /**
7932  * smb20_oplock_break_ack() - handler for smb2.0 oplock break command
7933  * @work:       smb work containing oplock break command buffer
7934  *
7935  * Return:      0
7936  */
7937 static void smb20_oplock_break_ack(struct ksmbd_work *work)
7938 {
7939         struct smb2_oplock_break *req = smb2_get_msg(work->request_buf);
7940         struct smb2_oplock_break *rsp = smb2_get_msg(work->response_buf);
7941         struct ksmbd_file *fp;
7942         struct oplock_info *opinfo = NULL;
7943         __le32 err = 0;
7944         int ret = 0;
7945         u64 volatile_id, persistent_id;
7946         char req_oplevel = 0, rsp_oplevel = 0;
7947         unsigned int oplock_change_type;
7948
7949         volatile_id = req->VolatileFid;
7950         persistent_id = req->PersistentFid;
7951         req_oplevel = req->OplockLevel;
7952         ksmbd_debug(OPLOCK, "v_id %llu, p_id %llu request oplock level %d\n",
7953                     volatile_id, persistent_id, req_oplevel);
7954
7955         fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id);
7956         if (!fp) {
7957                 rsp->hdr.Status = STATUS_FILE_CLOSED;
7958                 smb2_set_err_rsp(work);
7959                 return;
7960         }
7961
7962         opinfo = opinfo_get(fp);
7963         if (!opinfo) {
7964                 pr_err("unexpected null oplock_info\n");
7965                 rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL;
7966                 smb2_set_err_rsp(work);
7967                 ksmbd_fd_put(work, fp);
7968                 return;
7969         }
7970
7971         if (opinfo->level == SMB2_OPLOCK_LEVEL_NONE) {
7972                 rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL;
7973                 goto err_out;
7974         }
7975
7976         if (opinfo->op_state == OPLOCK_STATE_NONE) {
7977                 ksmbd_debug(SMB, "unexpected oplock state 0x%x\n", opinfo->op_state);
7978                 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
7979                 goto err_out;
7980         }
7981
7982         if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
7983              opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
7984             (req_oplevel != SMB2_OPLOCK_LEVEL_II &&
7985              req_oplevel != SMB2_OPLOCK_LEVEL_NONE)) {
7986                 err = STATUS_INVALID_OPLOCK_PROTOCOL;
7987                 oplock_change_type = OPLOCK_WRITE_TO_NONE;
7988         } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II &&
7989                    req_oplevel != SMB2_OPLOCK_LEVEL_NONE) {
7990                 err = STATUS_INVALID_OPLOCK_PROTOCOL;
7991                 oplock_change_type = OPLOCK_READ_TO_NONE;
7992         } else if (req_oplevel == SMB2_OPLOCK_LEVEL_II ||
7993                    req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
7994                 err = STATUS_INVALID_DEVICE_STATE;
7995                 if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
7996                      opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
7997                     req_oplevel == SMB2_OPLOCK_LEVEL_II) {
7998                         oplock_change_type = OPLOCK_WRITE_TO_READ;
7999                 } else if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
8000                             opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
8001                            req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
8002                         oplock_change_type = OPLOCK_WRITE_TO_NONE;
8003                 } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II &&
8004                            req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
8005                         oplock_change_type = OPLOCK_READ_TO_NONE;
8006                 } else {
8007                         oplock_change_type = 0;
8008                 }
8009         } else {
8010                 oplock_change_type = 0;
8011         }
8012
8013         switch (oplock_change_type) {
8014         case OPLOCK_WRITE_TO_READ:
8015                 ret = opinfo_write_to_read(opinfo);
8016                 rsp_oplevel = SMB2_OPLOCK_LEVEL_II;
8017                 break;
8018         case OPLOCK_WRITE_TO_NONE:
8019                 ret = opinfo_write_to_none(opinfo);
8020                 rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE;
8021                 break;
8022         case OPLOCK_READ_TO_NONE:
8023                 ret = opinfo_read_to_none(opinfo);
8024                 rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE;
8025                 break;
8026         default:
8027                 pr_err("unknown oplock change 0x%x -> 0x%x\n",
8028                        opinfo->level, rsp_oplevel);
8029         }
8030
8031         if (ret < 0) {
8032                 rsp->hdr.Status = err;
8033                 goto err_out;
8034         }
8035
8036         opinfo_put(opinfo);
8037         ksmbd_fd_put(work, fp);
8038         opinfo->op_state = OPLOCK_STATE_NONE;
8039         wake_up_interruptible_all(&opinfo->oplock_q);
8040
8041         rsp->StructureSize = cpu_to_le16(24);
8042         rsp->OplockLevel = rsp_oplevel;
8043         rsp->Reserved = 0;
8044         rsp->Reserved2 = 0;
8045         rsp->VolatileFid = volatile_id;
8046         rsp->PersistentFid = persistent_id;
8047         inc_rfc1001_len(work->response_buf, 24);
8048         return;
8049
8050 err_out:
8051         opinfo->op_state = OPLOCK_STATE_NONE;
8052         wake_up_interruptible_all(&opinfo->oplock_q);
8053
8054         opinfo_put(opinfo);
8055         ksmbd_fd_put(work, fp);
8056         smb2_set_err_rsp(work);
8057 }
8058
8059 static int check_lease_state(struct lease *lease, __le32 req_state)
8060 {
8061         if ((lease->new_state ==
8062              (SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE)) &&
8063             !(req_state & SMB2_LEASE_WRITE_CACHING_LE)) {
8064                 lease->new_state = req_state;
8065                 return 0;
8066         }
8067
8068         if (lease->new_state == req_state)
8069                 return 0;
8070
8071         return 1;
8072 }
8073
8074 /**
8075  * smb21_lease_break_ack() - handler for smb2.1 lease break command
8076  * @work:       smb work containing lease break command buffer
8077  *
8078  * Return:      0
8079  */
8080 static void smb21_lease_break_ack(struct ksmbd_work *work)
8081 {
8082         struct ksmbd_conn *conn = work->conn;
8083         struct smb2_lease_ack *req = smb2_get_msg(work->request_buf);
8084         struct smb2_lease_ack *rsp = smb2_get_msg(work->response_buf);
8085         struct oplock_info *opinfo;
8086         __le32 err = 0;
8087         int ret = 0;
8088         unsigned int lease_change_type;
8089         __le32 lease_state;
8090         struct lease *lease;
8091
8092         ksmbd_debug(OPLOCK, "smb21 lease break, lease state(0x%x)\n",
8093                     le32_to_cpu(req->LeaseState));
8094         opinfo = lookup_lease_in_table(conn, req->LeaseKey);
8095         if (!opinfo) {
8096                 ksmbd_debug(OPLOCK, "file not opened\n");
8097                 smb2_set_err_rsp(work);
8098                 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8099                 return;
8100         }
8101         lease = opinfo->o_lease;
8102
8103         if (opinfo->op_state == OPLOCK_STATE_NONE) {
8104                 pr_err("unexpected lease break state 0x%x\n",
8105                        opinfo->op_state);
8106                 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8107                 goto err_out;
8108         }
8109
8110         if (check_lease_state(lease, req->LeaseState)) {
8111                 rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED;
8112                 ksmbd_debug(OPLOCK,
8113                             "req lease state: 0x%x, expected state: 0x%x\n",
8114                             req->LeaseState, lease->new_state);
8115                 goto err_out;
8116         }
8117
8118         if (!atomic_read(&opinfo->breaking_cnt)) {
8119                 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8120                 goto err_out;
8121         }
8122
8123         /* check for bad lease state */
8124         if (req->LeaseState &
8125             (~(SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE))) {
8126                 err = STATUS_INVALID_OPLOCK_PROTOCOL;
8127                 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
8128                         lease_change_type = OPLOCK_WRITE_TO_NONE;
8129                 else
8130                         lease_change_type = OPLOCK_READ_TO_NONE;
8131                 ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n",
8132                             le32_to_cpu(lease->state),
8133                             le32_to_cpu(req->LeaseState));
8134         } else if (lease->state == SMB2_LEASE_READ_CACHING_LE &&
8135                    req->LeaseState != SMB2_LEASE_NONE_LE) {
8136                 err = STATUS_INVALID_OPLOCK_PROTOCOL;
8137                 lease_change_type = OPLOCK_READ_TO_NONE;
8138                 ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n",
8139                             le32_to_cpu(lease->state),
8140                             le32_to_cpu(req->LeaseState));
8141         } else {
8142                 /* valid lease state changes */
8143                 err = STATUS_INVALID_DEVICE_STATE;
8144                 if (req->LeaseState == SMB2_LEASE_NONE_LE) {
8145                         if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
8146                                 lease_change_type = OPLOCK_WRITE_TO_NONE;
8147                         else
8148                                 lease_change_type = OPLOCK_READ_TO_NONE;
8149                 } else if (req->LeaseState & SMB2_LEASE_READ_CACHING_LE) {
8150                         if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
8151                                 lease_change_type = OPLOCK_WRITE_TO_READ;
8152                         else
8153                                 lease_change_type = OPLOCK_READ_HANDLE_TO_READ;
8154                 } else {
8155                         lease_change_type = 0;
8156                 }
8157         }
8158
8159         switch (lease_change_type) {
8160         case OPLOCK_WRITE_TO_READ:
8161                 ret = opinfo_write_to_read(opinfo);
8162                 break;
8163         case OPLOCK_READ_HANDLE_TO_READ:
8164                 ret = opinfo_read_handle_to_read(opinfo);
8165                 break;
8166         case OPLOCK_WRITE_TO_NONE:
8167                 ret = opinfo_write_to_none(opinfo);
8168                 break;
8169         case OPLOCK_READ_TO_NONE:
8170                 ret = opinfo_read_to_none(opinfo);
8171                 break;
8172         default:
8173                 ksmbd_debug(OPLOCK, "unknown lease change 0x%x -> 0x%x\n",
8174                             le32_to_cpu(lease->state),
8175                             le32_to_cpu(req->LeaseState));
8176         }
8177
8178         lease_state = lease->state;
8179         opinfo->op_state = OPLOCK_STATE_NONE;
8180         wake_up_interruptible_all(&opinfo->oplock_q);
8181         atomic_dec(&opinfo->breaking_cnt);
8182         wake_up_interruptible_all(&opinfo->oplock_brk);
8183         opinfo_put(opinfo);
8184
8185         if (ret < 0) {
8186                 rsp->hdr.Status = err;
8187                 goto err_out;
8188         }
8189
8190         rsp->StructureSize = cpu_to_le16(36);
8191         rsp->Reserved = 0;
8192         rsp->Flags = 0;
8193         memcpy(rsp->LeaseKey, req->LeaseKey, 16);
8194         rsp->LeaseState = lease_state;
8195         rsp->LeaseDuration = 0;
8196         inc_rfc1001_len(work->response_buf, 36);
8197         return;
8198
8199 err_out:
8200         opinfo->op_state = OPLOCK_STATE_NONE;
8201         wake_up_interruptible_all(&opinfo->oplock_q);
8202         atomic_dec(&opinfo->breaking_cnt);
8203         wake_up_interruptible_all(&opinfo->oplock_brk);
8204
8205         opinfo_put(opinfo);
8206         smb2_set_err_rsp(work);
8207 }
8208
8209 /**
8210  * smb2_oplock_break() - dispatcher for smb2.0 and 2.1 oplock/lease break
8211  * @work:       smb work containing oplock/lease break command buffer
8212  *
8213  * Return:      0
8214  */
8215 int smb2_oplock_break(struct ksmbd_work *work)
8216 {
8217         struct smb2_oplock_break *req = smb2_get_msg(work->request_buf);
8218         struct smb2_oplock_break *rsp = smb2_get_msg(work->response_buf);
8219
8220         switch (le16_to_cpu(req->StructureSize)) {
8221         case OP_BREAK_STRUCT_SIZE_20:
8222                 smb20_oplock_break_ack(work);
8223                 break;
8224         case OP_BREAK_STRUCT_SIZE_21:
8225                 smb21_lease_break_ack(work);
8226                 break;
8227         default:
8228                 ksmbd_debug(OPLOCK, "invalid break cmd %d\n",
8229                             le16_to_cpu(req->StructureSize));
8230                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
8231                 smb2_set_err_rsp(work);
8232         }
8233
8234         return 0;
8235 }
8236
8237 /**
8238  * smb2_notify() - handler for smb2 notify request
8239  * @work:   smb work containing notify command buffer
8240  *
8241  * Return:      0
8242  */
8243 int smb2_notify(struct ksmbd_work *work)
8244 {
8245         struct smb2_change_notify_req *req;
8246         struct smb2_change_notify_rsp *rsp;
8247
8248         WORK_BUFFERS(work, req, rsp);
8249
8250         if (work->next_smb2_rcv_hdr_off && req->hdr.NextCommand) {
8251                 rsp->hdr.Status = STATUS_INTERNAL_ERROR;
8252                 smb2_set_err_rsp(work);
8253                 return 0;
8254         }
8255
8256         smb2_set_err_rsp(work);
8257         rsp->hdr.Status = STATUS_NOT_IMPLEMENTED;
8258         return 0;
8259 }
8260
8261 /**
8262  * smb2_is_sign_req() - handler for checking packet signing status
8263  * @work:       smb work containing notify command buffer
8264  * @command:    SMB2 command id
8265  *
8266  * Return:      true if packed is signed, false otherwise
8267  */
8268 bool smb2_is_sign_req(struct ksmbd_work *work, unsigned int command)
8269 {
8270         struct smb2_hdr *rcv_hdr2 = smb2_get_msg(work->request_buf);
8271
8272         if ((rcv_hdr2->Flags & SMB2_FLAGS_SIGNED) &&
8273             command != SMB2_NEGOTIATE_HE &&
8274             command != SMB2_SESSION_SETUP_HE &&
8275             command != SMB2_OPLOCK_BREAK_HE)
8276                 return true;
8277
8278         return false;
8279 }
8280
8281 /**
8282  * smb2_check_sign_req() - handler for req packet sign processing
8283  * @work:   smb work containing notify command buffer
8284  *
8285  * Return:      1 on success, 0 otherwise
8286  */
8287 int smb2_check_sign_req(struct ksmbd_work *work)
8288 {
8289         struct smb2_hdr *hdr;
8290         char signature_req[SMB2_SIGNATURE_SIZE];
8291         char signature[SMB2_HMACSHA256_SIZE];
8292         struct kvec iov[1];
8293         size_t len;
8294
8295         hdr = smb2_get_msg(work->request_buf);
8296         if (work->next_smb2_rcv_hdr_off)
8297                 hdr = ksmbd_req_buf_next(work);
8298
8299         if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off)
8300                 len = get_rfc1002_len(work->request_buf);
8301         else if (hdr->NextCommand)
8302                 len = le32_to_cpu(hdr->NextCommand);
8303         else
8304                 len = get_rfc1002_len(work->request_buf) -
8305                         work->next_smb2_rcv_hdr_off;
8306
8307         memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE);
8308         memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8309
8310         iov[0].iov_base = (char *)&hdr->ProtocolId;
8311         iov[0].iov_len = len;
8312
8313         if (ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, 1,
8314                                 signature))
8315                 return 0;
8316
8317         if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) {
8318                 pr_err("bad smb2 signature\n");
8319                 return 0;
8320         }
8321
8322         return 1;
8323 }
8324
8325 /**
8326  * smb2_set_sign_rsp() - handler for rsp packet sign processing
8327  * @work:   smb work containing notify command buffer
8328  *
8329  */
8330 void smb2_set_sign_rsp(struct ksmbd_work *work)
8331 {
8332         struct smb2_hdr *hdr;
8333         struct smb2_hdr *req_hdr;
8334         char signature[SMB2_HMACSHA256_SIZE];
8335         struct kvec iov[2];
8336         size_t len;
8337         int n_vec = 1;
8338
8339         hdr = smb2_get_msg(work->response_buf);
8340         if (work->next_smb2_rsp_hdr_off)
8341                 hdr = ksmbd_resp_buf_next(work);
8342
8343         req_hdr = ksmbd_req_buf_next(work);
8344
8345         if (!work->next_smb2_rsp_hdr_off) {
8346                 len = get_rfc1002_len(work->response_buf);
8347                 if (req_hdr->NextCommand)
8348                         len = ALIGN(len, 8);
8349         } else {
8350                 len = get_rfc1002_len(work->response_buf) -
8351                         work->next_smb2_rsp_hdr_off;
8352                 len = ALIGN(len, 8);
8353         }
8354
8355         if (req_hdr->NextCommand)
8356                 hdr->NextCommand = cpu_to_le32(len);
8357
8358         hdr->Flags |= SMB2_FLAGS_SIGNED;
8359         memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8360
8361         iov[0].iov_base = (char *)&hdr->ProtocolId;
8362         iov[0].iov_len = len;
8363
8364         if (work->aux_payload_sz) {
8365                 iov[0].iov_len -= work->aux_payload_sz;
8366
8367                 iov[1].iov_base = work->aux_payload_buf;
8368                 iov[1].iov_len = work->aux_payload_sz;
8369                 n_vec++;
8370         }
8371
8372         if (!ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, n_vec,
8373                                  signature))
8374                 memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE);
8375 }
8376
8377 /**
8378  * smb3_check_sign_req() - handler for req packet sign processing
8379  * @work:   smb work containing notify command buffer
8380  *
8381  * Return:      1 on success, 0 otherwise
8382  */
8383 int smb3_check_sign_req(struct ksmbd_work *work)
8384 {
8385         struct ksmbd_conn *conn = work->conn;
8386         char *signing_key;
8387         struct smb2_hdr *hdr;
8388         struct channel *chann;
8389         char signature_req[SMB2_SIGNATURE_SIZE];
8390         char signature[SMB2_CMACAES_SIZE];
8391         struct kvec iov[1];
8392         size_t len;
8393
8394         hdr = smb2_get_msg(work->request_buf);
8395         if (work->next_smb2_rcv_hdr_off)
8396                 hdr = ksmbd_req_buf_next(work);
8397
8398         if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off)
8399                 len = get_rfc1002_len(work->request_buf);
8400         else if (hdr->NextCommand)
8401                 len = le32_to_cpu(hdr->NextCommand);
8402         else
8403                 len = get_rfc1002_len(work->request_buf) -
8404                         work->next_smb2_rcv_hdr_off;
8405
8406         if (le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) {
8407                 signing_key = work->sess->smb3signingkey;
8408         } else {
8409                 read_lock(&work->sess->chann_lock);
8410                 chann = lookup_chann_list(work->sess, conn);
8411                 if (!chann) {
8412                         read_unlock(&work->sess->chann_lock);
8413                         return 0;
8414                 }
8415                 signing_key = chann->smb3signingkey;
8416                 read_unlock(&work->sess->chann_lock);
8417         }
8418
8419         if (!signing_key) {
8420                 pr_err("SMB3 signing key is not generated\n");
8421                 return 0;
8422         }
8423
8424         memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE);
8425         memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8426         iov[0].iov_base = (char *)&hdr->ProtocolId;
8427         iov[0].iov_len = len;
8428
8429         if (ksmbd_sign_smb3_pdu(conn, signing_key, iov, 1, signature))
8430                 return 0;
8431
8432         if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) {
8433                 pr_err("bad smb2 signature\n");
8434                 return 0;
8435         }
8436
8437         return 1;
8438 }
8439
8440 /**
8441  * smb3_set_sign_rsp() - handler for rsp packet sign processing
8442  * @work:   smb work containing notify command buffer
8443  *
8444  */
8445 void smb3_set_sign_rsp(struct ksmbd_work *work)
8446 {
8447         struct ksmbd_conn *conn = work->conn;
8448         struct smb2_hdr *req_hdr, *hdr;
8449         struct channel *chann;
8450         char signature[SMB2_CMACAES_SIZE];
8451         struct kvec iov[2];
8452         int n_vec = 1;
8453         size_t len;
8454         char *signing_key;
8455
8456         hdr = smb2_get_msg(work->response_buf);
8457         if (work->next_smb2_rsp_hdr_off)
8458                 hdr = ksmbd_resp_buf_next(work);
8459
8460         req_hdr = ksmbd_req_buf_next(work);
8461
8462         if (!work->next_smb2_rsp_hdr_off) {
8463                 len = get_rfc1002_len(work->response_buf);
8464                 if (req_hdr->NextCommand)
8465                         len = ALIGN(len, 8);
8466         } else {
8467                 len = get_rfc1002_len(work->response_buf) -
8468                         work->next_smb2_rsp_hdr_off;
8469                 len = ALIGN(len, 8);
8470         }
8471
8472         if (conn->binding == false &&
8473             le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) {
8474                 signing_key = work->sess->smb3signingkey;
8475         } else {
8476                 read_lock(&work->sess->chann_lock);
8477                 chann = lookup_chann_list(work->sess, work->conn);
8478                 if (!chann) {
8479                         read_unlock(&work->sess->chann_lock);
8480                         return;
8481                 }
8482                 signing_key = chann->smb3signingkey;
8483                 read_unlock(&work->sess->chann_lock);
8484         }
8485
8486         if (!signing_key)
8487                 return;
8488
8489         if (req_hdr->NextCommand)
8490                 hdr->NextCommand = cpu_to_le32(len);
8491
8492         hdr->Flags |= SMB2_FLAGS_SIGNED;
8493         memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8494         iov[0].iov_base = (char *)&hdr->ProtocolId;
8495         iov[0].iov_len = len;
8496         if (work->aux_payload_sz) {
8497                 iov[0].iov_len -= work->aux_payload_sz;
8498                 iov[1].iov_base = work->aux_payload_buf;
8499                 iov[1].iov_len = work->aux_payload_sz;
8500                 n_vec++;
8501         }
8502
8503         if (!ksmbd_sign_smb3_pdu(conn, signing_key, iov, n_vec, signature))
8504                 memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE);
8505 }
8506
8507 /**
8508  * smb3_preauth_hash_rsp() - handler for computing preauth hash on response
8509  * @work:   smb work containing response buffer
8510  *
8511  */
8512 void smb3_preauth_hash_rsp(struct ksmbd_work *work)
8513 {
8514         struct ksmbd_conn *conn = work->conn;
8515         struct ksmbd_session *sess = work->sess;
8516         struct smb2_hdr *req, *rsp;
8517
8518         if (conn->dialect != SMB311_PROT_ID)
8519                 return;
8520
8521         WORK_BUFFERS(work, req, rsp);
8522
8523         if (le16_to_cpu(req->Command) == SMB2_NEGOTIATE_HE &&
8524             conn->preauth_info)
8525                 ksmbd_gen_preauth_integrity_hash(conn, work->response_buf,
8526                                                  conn->preauth_info->Preauth_HashValue);
8527
8528         if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE && sess) {
8529                 __u8 *hash_value;
8530
8531                 if (conn->binding) {
8532                         struct preauth_session *preauth_sess;
8533
8534                         preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id);
8535                         if (!preauth_sess)
8536                                 return;
8537                         hash_value = preauth_sess->Preauth_HashValue;
8538                 } else {
8539                         hash_value = sess->Preauth_HashValue;
8540                         if (!hash_value)
8541                                 return;
8542                 }
8543                 ksmbd_gen_preauth_integrity_hash(conn, work->response_buf,
8544                                                  hash_value);
8545         }
8546 }
8547
8548 static void fill_transform_hdr(void *tr_buf, char *old_buf, __le16 cipher_type)
8549 {
8550         struct smb2_transform_hdr *tr_hdr = tr_buf + 4;
8551         struct smb2_hdr *hdr = smb2_get_msg(old_buf);
8552         unsigned int orig_len = get_rfc1002_len(old_buf);
8553
8554         /* tr_buf must be cleared by the caller */
8555         tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
8556         tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
8557         tr_hdr->Flags = cpu_to_le16(TRANSFORM_FLAG_ENCRYPTED);
8558         if (cipher_type == SMB2_ENCRYPTION_AES128_GCM ||
8559             cipher_type == SMB2_ENCRYPTION_AES256_GCM)
8560                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
8561         else
8562                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
8563         memcpy(&tr_hdr->SessionId, &hdr->SessionId, 8);
8564         inc_rfc1001_len(tr_buf, sizeof(struct smb2_transform_hdr));
8565         inc_rfc1001_len(tr_buf, orig_len);
8566 }
8567
8568 int smb3_encrypt_resp(struct ksmbd_work *work)
8569 {
8570         char *buf = work->response_buf;
8571         struct kvec iov[3];
8572         int rc = -ENOMEM;
8573         int buf_size = 0, rq_nvec = 2 + (work->aux_payload_sz ? 1 : 0);
8574
8575         if (ARRAY_SIZE(iov) < rq_nvec)
8576                 return -ENOMEM;
8577
8578         work->tr_buf = kzalloc(sizeof(struct smb2_transform_hdr) + 4, GFP_KERNEL);
8579         if (!work->tr_buf)
8580                 return rc;
8581
8582         /* fill transform header */
8583         fill_transform_hdr(work->tr_buf, buf, work->conn->cipher_type);
8584
8585         iov[0].iov_base = work->tr_buf;
8586         iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4;
8587         buf_size += iov[0].iov_len - 4;
8588
8589         iov[1].iov_base = buf + 4;
8590         iov[1].iov_len = get_rfc1002_len(buf);
8591         if (work->aux_payload_sz) {
8592                 iov[1].iov_len = work->resp_hdr_sz - 4;
8593
8594                 iov[2].iov_base = work->aux_payload_buf;
8595                 iov[2].iov_len = work->aux_payload_sz;
8596                 buf_size += iov[2].iov_len;
8597         }
8598         buf_size += iov[1].iov_len;
8599         work->resp_hdr_sz = iov[1].iov_len;
8600
8601         rc = ksmbd_crypt_message(work, iov, rq_nvec, 1);
8602         if (rc)
8603                 return rc;
8604
8605         memmove(buf, iov[1].iov_base, iov[1].iov_len);
8606         *(__be32 *)work->tr_buf = cpu_to_be32(buf_size);
8607
8608         return rc;
8609 }
8610
8611 bool smb3_is_transform_hdr(void *buf)
8612 {
8613         struct smb2_transform_hdr *trhdr = smb2_get_msg(buf);
8614
8615         return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
8616 }
8617
8618 int smb3_decrypt_req(struct ksmbd_work *work)
8619 {
8620         struct ksmbd_session *sess;
8621         char *buf = work->request_buf;
8622         unsigned int pdu_length = get_rfc1002_len(buf);
8623         struct kvec iov[2];
8624         int buf_data_size = pdu_length - sizeof(struct smb2_transform_hdr);
8625         struct smb2_transform_hdr *tr_hdr = smb2_get_msg(buf);
8626         int rc = 0;
8627
8628         if (buf_data_size < sizeof(struct smb2_hdr)) {
8629                 pr_err("Transform message is too small (%u)\n",
8630                        pdu_length);
8631                 return -ECONNABORTED;
8632         }
8633
8634         if (buf_data_size < le32_to_cpu(tr_hdr->OriginalMessageSize)) {
8635                 pr_err("Transform message is broken\n");
8636                 return -ECONNABORTED;
8637         }
8638
8639         sess = ksmbd_session_lookup_all(work->conn, le64_to_cpu(tr_hdr->SessionId));
8640         if (!sess) {
8641                 pr_err("invalid session id(%llx) in transform header\n",
8642                        le64_to_cpu(tr_hdr->SessionId));
8643                 return -ECONNABORTED;
8644         }
8645
8646         iov[0].iov_base = buf;
8647         iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4;
8648         iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr) + 4;
8649         iov[1].iov_len = buf_data_size;
8650         rc = ksmbd_crypt_message(work, iov, 2, 0);
8651         if (rc)
8652                 return rc;
8653
8654         memmove(buf + 4, iov[1].iov_base, buf_data_size);
8655         *(__be32 *)buf = cpu_to_be32(buf_data_size);
8656
8657         return rc;
8658 }
8659
8660 bool smb3_11_final_sess_setup_resp(struct ksmbd_work *work)
8661 {
8662         struct ksmbd_conn *conn = work->conn;
8663         struct smb2_hdr *rsp = smb2_get_msg(work->response_buf);
8664
8665         if (conn->dialect < SMB30_PROT_ID)
8666                 return false;
8667
8668         if (work->next_smb2_rcv_hdr_off)
8669                 rsp = ksmbd_resp_buf_next(work);
8670
8671         if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE &&
8672             rsp->Status == STATUS_SUCCESS)
8673                 return true;
8674         return false;
8675 }