fs/smb/server/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 #include <linux/filelock.h>
  16
  17 #include "glob.h"
  18 #include "smbfsctl.h"
  19 #include "oplock.h"
  20 #include "smbacl.h"
  21
  22 #include "auth.h"
  23 #include "asn1.h"
  24 #include "connection.h"
  25 #include "transport_ipc.h"
  26 #include "transport_rdma.h"
  27 #include "vfs.h"
  28 #include "vfs_cache.h"
  29 #include "misc.h"
  30
  31 #include "server.h"
  32 #include "smb_common.h"
  33 #include "smbstatus.h"
  34 #include "ksmbd_work.h"
  35 #include "mgmt/user_config.h"
  36 #include "mgmt/share_config.h"
  37 #include "mgmt/tree_connect.h"
  38 #include "mgmt/user_session.h"
  39 #include "mgmt/ksmbd_ida.h"
  40 #include "ndr.h"
  41
  42 static void __wbuf(struct ksmbd_work *work, void **req, void **rsp)
  43 {
  44         if (work->next_smb2_rcv_hdr_off) {
  45                 *req = ksmbd_req_buf_next(work);
  46                 *rsp = ksmbd_resp_buf_next(work);
  47         } else {
  48                 *req = smb2_get_msg(work->request_buf);
  49                 *rsp = smb2_get_msg(work->response_buf);
  50         }
  51 }
  52
  53 #define WORK_BUFFERS(w, rq, rs) __wbuf((w), (void **)&(rq), (void **)&(rs))
  54
  55 /**
  56  * check_session_id() - check for valid session id in smb header
  57  * @conn:       connection instance
  58  * @id:         session id from smb header
  59  *
  60  * Return:      1 if valid session id, otherwise 0
  61  */
  62 static inline bool check_session_id(struct ksmbd_conn *conn, u64 id)
  63 {
  64         struct ksmbd_session *sess;
  65
  66         if (id == 0 || id == -1)
  67                 return false;
  68
  69         sess = ksmbd_session_lookup_all(conn, id);
  70         if (sess)
  71                 return true;
  72         pr_err("Invalid user session id: %llu\n", id);
  73         return false;
  74 }
  75
  76 struct channel *lookup_chann_list(struct ksmbd_session *sess, struct ksmbd_conn *conn)
  77 {
  78         return xa_load(&sess->ksmbd_chann_list, (long)conn);
  79 }
  80
  81 /**
  82  * smb2_get_ksmbd_tcon() - get tree connection information using a tree id.
  83  * @work:       smb work
  84  *
  85  * Return:      0 if there is a tree connection matched or these are
  86  *              skipable commands, otherwise error
  87  */
  88 int smb2_get_ksmbd_tcon(struct ksmbd_work *work)
  89 {
  90         struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work);
  91         unsigned int cmd = le16_to_cpu(req_hdr->Command);
  92         unsigned int tree_id;
  93
  94         if (cmd == SMB2_TREE_CONNECT_HE ||
  95             cmd ==  SMB2_CANCEL_HE ||
  96             cmd ==  SMB2_LOGOFF_HE) {
  97                 ksmbd_debug(SMB, "skip to check tree connect request\n");
  98                 return 0;
  99         }
 100
 101         if (xa_empty(&work->sess->tree_conns)) {
 102                 ksmbd_debug(SMB, "NO tree connected\n");
 103                 return -ENOENT;
 104         }
 105
 106         tree_id = le32_to_cpu(req_hdr->Id.SyncId.TreeId);
 107
 108         /*
 109          * If request is not the first in Compound request,
 110          * Just validate tree id in header with work->tcon->id.
 111          */
 112         if (work->next_smb2_rcv_hdr_off) {
 113                 if (!work->tcon) {
 114                         pr_err("The first operation in the compound does not have tcon\n");
 115                         return -EINVAL;
 116                 }
 117                 if (tree_id != UINT_MAX && work->tcon->id != tree_id) {
 118                         pr_err("tree id(%u) is different with id(%u) in first operation\n",
 119                                         tree_id, work->tcon->id);
 120                         return -EINVAL;
 121                 }
 122                 return 1;
 123         }
 124
 125         work->tcon = ksmbd_tree_conn_lookup(work->sess, tree_id);
 126         if (!work->tcon) {
 127                 pr_err("Invalid tid %d\n", tree_id);
 128                 return -ENOENT;
 129         }
 130
 131         return 1;
 132 }
 133
 134 /**
 135  * smb2_set_err_rsp() - set error response code on smb response
 136  * @work:       smb work containing response buffer
 137  */
 138 void smb2_set_err_rsp(struct ksmbd_work *work)
 139 {
 140         struct smb2_err_rsp *err_rsp;
 141
 142         if (work->next_smb2_rcv_hdr_off)
 143                 err_rsp = ksmbd_resp_buf_next(work);
 144         else
 145                 err_rsp = smb2_get_msg(work->response_buf);
 146
 147         if (err_rsp->hdr.Status != STATUS_STOPPED_ON_SYMLINK) {
 148                 int err;
 149
 150                 err_rsp->StructureSize = SMB2_ERROR_STRUCTURE_SIZE2_LE;
 151                 err_rsp->ErrorContextCount = 0;
 152                 err_rsp->Reserved = 0;
 153                 err_rsp->ByteCount = 0;
 154                 err_rsp->ErrorData[0] = 0;
 155                 err = ksmbd_iov_pin_rsp(work, (void *)err_rsp,
 156                                         __SMB2_HEADER_STRUCTURE_SIZE +
 157                                                 SMB2_ERROR_STRUCTURE_SIZE2);
 158                 if (err)
 159                         work->send_no_response = 1;
 160         }
 161 }
 162
 163 /**
 164  * is_smb2_neg_cmd() - is it smb2 negotiation command
 165  * @work:       smb work containing smb header
 166  *
 167  * Return:      true if smb2 negotiation command, otherwise false
 168  */
 169 bool is_smb2_neg_cmd(struct ksmbd_work *work)
 170 {
 171         struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
 172
 173         /* is it SMB2 header ? */
 174         if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
 175                 return false;
 176
 177         /* make sure it is request not response message */
 178         if (hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR)
 179                 return false;
 180
 181         if (hdr->Command != SMB2_NEGOTIATE)
 182                 return false;
 183
 184         return true;
 185 }
 186
 187 /**
 188  * is_smb2_rsp() - is it smb2 response
 189  * @work:       smb work containing smb response buffer
 190  *
 191  * Return:      true if smb2 response, otherwise false
 192  */
 193 bool is_smb2_rsp(struct ksmbd_work *work)
 194 {
 195         struct smb2_hdr *hdr = smb2_get_msg(work->response_buf);
 196
 197         /* is it SMB2 header ? */
 198         if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
 199                 return false;
 200
 201         /* make sure it is response not request message */
 202         if (!(hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR))
 203                 return false;
 204
 205         return true;
 206 }
 207
 208 /**
 209  * get_smb2_cmd_val() - get smb command code from smb header
 210  * @work:       smb work containing smb request buffer
 211  *
 212  * Return:      smb2 request command value
 213  */
 214 u16 get_smb2_cmd_val(struct ksmbd_work *work)
 215 {
 216         struct smb2_hdr *rcv_hdr;
 217
 218         if (work->next_smb2_rcv_hdr_off)
 219                 rcv_hdr = ksmbd_req_buf_next(work);
 220         else
 221                 rcv_hdr = smb2_get_msg(work->request_buf);
 222         return le16_to_cpu(rcv_hdr->Command);
 223 }
 224
 225 /**
 226  * set_smb2_rsp_status() - set error response code on smb2 header
 227  * @work:       smb work containing response buffer
 228  * @err:        error response code
 229  */
 230 void set_smb2_rsp_status(struct ksmbd_work *work, __le32 err)
 231 {
 232         struct smb2_hdr *rsp_hdr;
 233
 234         if (work->next_smb2_rcv_hdr_off)
 235                 rsp_hdr = ksmbd_resp_buf_next(work);
 236         else
 237                 rsp_hdr = smb2_get_msg(work->response_buf);
 238         rsp_hdr->Status = err;
 239         smb2_set_err_rsp(work);
 240 }
 241
 242 /**
 243  * init_smb2_neg_rsp() - initialize smb2 response for negotiate command
 244  * @work:       smb work containing smb request buffer
 245  *
 246  * smb2 negotiate response is sent in reply of smb1 negotiate command for
 247  * dialect auto-negotiation.
 248  */
 249 int init_smb2_neg_rsp(struct ksmbd_work *work)
 250 {
 251         struct smb2_hdr *rsp_hdr;
 252         struct smb2_negotiate_rsp *rsp;
 253         struct ksmbd_conn *conn = work->conn;
 254         int err;
 255
 256         rsp_hdr = smb2_get_msg(work->response_buf);
 257         memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
 258         rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER;
 259         rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
 260         rsp_hdr->CreditRequest = cpu_to_le16(2);
 261         rsp_hdr->Command = SMB2_NEGOTIATE;
 262         rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR);
 263         rsp_hdr->NextCommand = 0;
 264         rsp_hdr->MessageId = 0;
 265         rsp_hdr->Id.SyncId.ProcessId = 0;
 266         rsp_hdr->Id.SyncId.TreeId = 0;
 267         rsp_hdr->SessionId = 0;
 268         memset(rsp_hdr->Signature, 0, 16);
 269
 270         rsp = smb2_get_msg(work->response_buf);
 271
 272         WARN_ON(ksmbd_conn_good(conn));
 273
 274         rsp->StructureSize = cpu_to_le16(65);
 275         ksmbd_debug(SMB, "conn->dialect 0x%x\n", conn->dialect);
 276         rsp->DialectRevision = cpu_to_le16(conn->dialect);
 277         /* Not setting conn guid rsp->ServerGUID, as it
 278          * not used by client for identifying connection
 279          */
 280         rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
 281         /* Default Max Message Size till SMB2.0, 64K*/
 282         rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size);
 283         rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size);
 284         rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size);
 285
 286         rsp->SystemTime = cpu_to_le64(ksmbd_systime());
 287         rsp->ServerStartTime = 0;
 288
 289         rsp->SecurityBufferOffset = cpu_to_le16(128);
 290         rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH);
 291         ksmbd_copy_gss_neg_header((char *)(&rsp->hdr) +
 292                 le16_to_cpu(rsp->SecurityBufferOffset));
 293         rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE;
 294         if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY)
 295                 rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE;
 296         err = ksmbd_iov_pin_rsp(work, rsp,
 297                                 sizeof(struct smb2_negotiate_rsp) + AUTH_GSS_LENGTH);
 298         if (err)
 299                 return err;
 300         conn->use_spnego = true;
 301
 302         ksmbd_conn_set_need_negotiate(conn);
 303         return 0;
 304 }
 305
 306 /**
 307  * smb2_set_rsp_credits() - set number of credits in response buffer
 308  * @work:       smb work containing smb response buffer
 309  */
 310 int smb2_set_rsp_credits(struct ksmbd_work *work)
 311 {
 312         struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work);
 313         struct smb2_hdr *hdr = ksmbd_resp_buf_next(work);
 314         struct ksmbd_conn *conn = work->conn;
 315         unsigned short credits_requested, aux_max;
 316         unsigned short credit_charge, credits_granted = 0;
 317
 318         if (work->send_no_response)
 319                 return 0;
 320
 321         hdr->CreditCharge = req_hdr->CreditCharge;
 322
 323         if (conn->total_credits > conn->vals->max_credits) {
 324                 hdr->CreditRequest = 0;
 325                 pr_err("Total credits overflow: %d\n", conn->total_credits);
 326                 return -EINVAL;
 327         }
 328
 329         credit_charge = max_t(unsigned short,
 330                               le16_to_cpu(req_hdr->CreditCharge), 1);
 331         if (credit_charge > conn->total_credits) {
 332                 ksmbd_debug(SMB, "Insufficient credits granted, given: %u, granted: %u\n",
 333                             credit_charge, conn->total_credits);
 334                 return -EINVAL;
 335         }
 336
 337         conn->total_credits -= credit_charge;
 338         conn->outstanding_credits -= credit_charge;
 339         credits_requested = max_t(unsigned short,
 340                                   le16_to_cpu(req_hdr->CreditRequest), 1);
 341
 342         /* according to smb2.credits smbtorture, Windows server
 343          * 2016 or later grant up to 8192 credits at once.
 344          *
 345          * TODO: Need to adjuct CreditRequest value according to
 346          * current cpu load
 347          */
 348         if (hdr->Command == SMB2_NEGOTIATE)
 349                 aux_max = 1;
 350         else
 351                 aux_max = conn->vals->max_credits - conn->total_credits;
 352         credits_granted = min_t(unsigned short, credits_requested, aux_max);
 353
 354         conn->total_credits += credits_granted;
 355         work->credits_granted += credits_granted;
 356
 357         if (!req_hdr->NextCommand) {
 358                 /* Update CreditRequest in last request */
 359                 hdr->CreditRequest = cpu_to_le16(work->credits_granted);
 360         }
 361         ksmbd_debug(SMB,
 362                     "credits: requested[%d] granted[%d] total_granted[%d]\n",
 363                     credits_requested, credits_granted,
 364                     conn->total_credits);
 365         return 0;
 366 }
 367
 368 /**
 369  * init_chained_smb2_rsp() - initialize smb2 chained response
 370  * @work:       smb work containing smb response buffer
 371  */
 372 static void init_chained_smb2_rsp(struct ksmbd_work *work)
 373 {
 374         struct smb2_hdr *req = ksmbd_req_buf_next(work);
 375         struct smb2_hdr *rsp = ksmbd_resp_buf_next(work);
 376         struct smb2_hdr *rsp_hdr;
 377         struct smb2_hdr *rcv_hdr;
 378         int next_hdr_offset = 0;
 379         int len, new_len;
 380
 381         /* Len of this response = updated RFC len - offset of previous cmd
 382          * in the compound rsp
 383          */
 384
 385         /* Storing the current local FID which may be needed by subsequent
 386          * command in the compound request
 387          */
 388         if (req->Command == SMB2_CREATE && rsp->Status == STATUS_SUCCESS) {
 389                 work->compound_fid = ((struct smb2_create_rsp *)rsp)->VolatileFileId;
 390                 work->compound_pfid = ((struct smb2_create_rsp *)rsp)->PersistentFileId;
 391                 work->compound_sid = le64_to_cpu(rsp->SessionId);
 392         }
 393
 394         len = get_rfc1002_len(work->response_buf) - work->next_smb2_rsp_hdr_off;
 395         next_hdr_offset = le32_to_cpu(req->NextCommand);
 396
 397         new_len = ALIGN(len, 8);
 398         work->iov[work->iov_idx].iov_len += (new_len - len);
 399         inc_rfc1001_len(work->response_buf, new_len - len);
 400         rsp->NextCommand = cpu_to_le32(new_len);
 401
 402         work->next_smb2_rcv_hdr_off += next_hdr_offset;
 403         work->curr_smb2_rsp_hdr_off = work->next_smb2_rsp_hdr_off;
 404         work->next_smb2_rsp_hdr_off += new_len;
 405         ksmbd_debug(SMB,
 406                     "Compound req new_len = %d rcv off = %d rsp off = %d\n",
 407                     new_len, work->next_smb2_rcv_hdr_off,
 408                     work->next_smb2_rsp_hdr_off);
 409
 410         rsp_hdr = ksmbd_resp_buf_next(work);
 411         rcv_hdr = ksmbd_req_buf_next(work);
 412
 413         if (!(rcv_hdr->Flags & SMB2_FLAGS_RELATED_OPERATIONS)) {
 414                 ksmbd_debug(SMB, "related flag should be set\n");
 415                 work->compound_fid = KSMBD_NO_FID;
 416                 work->compound_pfid = KSMBD_NO_FID;
 417         }
 418         memset((char *)rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
 419         rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER;
 420         rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
 421         rsp_hdr->Command = rcv_hdr->Command;
 422
 423         /*
 424          * Message is response. We don't grant oplock yet.
 425          */
 426         rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR |
 427                                 SMB2_FLAGS_RELATED_OPERATIONS);
 428         rsp_hdr->NextCommand = 0;
 429         rsp_hdr->MessageId = rcv_hdr->MessageId;
 430         rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId;
 431         rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId;
 432         rsp_hdr->SessionId = rcv_hdr->SessionId;
 433         memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16);
 434 }
 435
 436 /**
 437  * is_chained_smb2_message() - check for chained command
 438  * @work:       smb work containing smb request buffer
 439  *
 440  * Return:      true if chained request, otherwise false
 441  */
 442 bool is_chained_smb2_message(struct ksmbd_work *work)
 443 {
 444         struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
 445         unsigned int len, next_cmd;
 446
 447         if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
 448                 return false;
 449
 450         hdr = ksmbd_req_buf_next(work);
 451         next_cmd = le32_to_cpu(hdr->NextCommand);
 452         if (next_cmd > 0) {
 453                 if ((u64)work->next_smb2_rcv_hdr_off + next_cmd +
 454                         __SMB2_HEADER_STRUCTURE_SIZE >
 455                     get_rfc1002_len(work->request_buf)) {
 456                         pr_err("next command(%u) offset exceeds smb msg size\n",
 457                                next_cmd);
 458                         return false;
 459                 }
 460
 461                 if ((u64)get_rfc1002_len(work->response_buf) + MAX_CIFS_SMALL_BUFFER_SIZE >
 462                     work->response_sz) {
 463                         pr_err("next response offset exceeds response buffer size\n");
 464                         return false;
 465                 }
 466
 467                 ksmbd_debug(SMB, "got SMB2 chained command\n");
 468                 init_chained_smb2_rsp(work);
 469                 return true;
 470         } else if (work->next_smb2_rcv_hdr_off) {
 471                 /*
 472                  * This is last request in chained command,
 473                  * align response to 8 byte
 474                  */
 475                 len = ALIGN(get_rfc1002_len(work->response_buf), 8);
 476                 len = len - get_rfc1002_len(work->response_buf);
 477                 if (len) {
 478                         ksmbd_debug(SMB, "padding len %u\n", len);
 479                         work->iov[work->iov_idx].iov_len += len;
 480                         inc_rfc1001_len(work->response_buf, len);
 481                 }
 482                 work->curr_smb2_rsp_hdr_off = work->next_smb2_rsp_hdr_off;
 483         }
 484         return false;
 485 }
 486
 487 /**
 488  * init_smb2_rsp_hdr() - initialize smb2 response
 489  * @work:       smb work containing smb request buffer
 490  *
 491  * Return:      0
 492  */
 493 int init_smb2_rsp_hdr(struct ksmbd_work *work)
 494 {
 495         struct smb2_hdr *rsp_hdr = smb2_get_msg(work->response_buf);
 496         struct smb2_hdr *rcv_hdr = smb2_get_msg(work->request_buf);
 497
 498         memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
 499         rsp_hdr->ProtocolId = rcv_hdr->ProtocolId;
 500         rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
 501         rsp_hdr->Command = rcv_hdr->Command;
 502
 503         /*
 504          * Message is response. We don't grant oplock yet.
 505          */
 506         rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR);
 507         rsp_hdr->NextCommand = 0;
 508         rsp_hdr->MessageId = rcv_hdr->MessageId;
 509         rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId;
 510         rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId;
 511         rsp_hdr->SessionId = rcv_hdr->SessionId;
 512         memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16);
 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 = kvzalloc(sz, GFP_KERNEL);
 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 = ksmbd_req_buf_next(work);
 566         struct ksmbd_conn *conn = work->conn;
 567         unsigned int cmd = le16_to_cpu(req_hdr->Command);
 568         unsigned long long sess_id;
 569
 570         /*
 571          * SMB2_ECHO, SMB2_NEGOTIATE, SMB2_SESSION_SETUP command do not
 572          * require a session id, so no need to validate user session's for
 573          * these commands.
 574          */
 575         if (cmd == SMB2_ECHO_HE || cmd == SMB2_NEGOTIATE_HE ||
 576             cmd == SMB2_SESSION_SETUP_HE)
 577                 return 0;
 578
 579         if (!ksmbd_conn_good(conn))
 580                 return -EIO;
 581
 582         sess_id = le64_to_cpu(req_hdr->SessionId);
 583
 584         /*
 585          * If request is not the first in Compound request,
 586          * Just validate session id in header with work->sess->id.
 587          */
 588         if (work->next_smb2_rcv_hdr_off) {
 589                 if (!work->sess) {
 590                         pr_err("The first operation in the compound does not have sess\n");
 591                         return -EINVAL;
 592                 }
 593                 if (sess_id != ULLONG_MAX && work->sess->id != sess_id) {
 594                         pr_err("session id(%llu) is different with the first operation(%lld)\n",
 595                                         sess_id, work->sess->id);
 596                         return -EINVAL;
 597                 }
 598                 return 1;
 599         }
 600
 601         /* Check for validity of user session */
 602         work->sess = ksmbd_session_lookup_all(conn, sess_id);
 603         if (work->sess)
 604                 return 1;
 605         ksmbd_debug(SMB, "Invalid user session, Uid %llu\n", sess_id);
 606         return -ENOENT;
 607 }
 608
 609 static void destroy_previous_session(struct ksmbd_conn *conn,
 610                                      struct ksmbd_user *user, u64 id)
 611 {
 612         struct ksmbd_session *prev_sess = ksmbd_session_lookup_slowpath(id);
 613         struct ksmbd_user *prev_user;
 614         struct channel *chann;
 615         long index;
 616
 617         if (!prev_sess)
 618                 return;
 619
 620         prev_user = prev_sess->user;
 621
 622         if (!prev_user ||
 623             strcmp(user->name, prev_user->name) ||
 624             user->passkey_sz != prev_user->passkey_sz ||
 625             memcmp(user->passkey, prev_user->passkey, user->passkey_sz))
 626                 return;
 627
 628         prev_sess->state = SMB2_SESSION_EXPIRED;
 629         xa_for_each(&prev_sess->ksmbd_chann_list, index, chann)
 630                 ksmbd_conn_set_exiting(chann->conn);
 631 }
 632
 633 /**
 634  * smb2_get_name() - get filename string from on the wire smb format
 635  * @src:        source buffer
 636  * @maxlen:     maxlen of source string
 637  * @local_nls:  nls_table pointer
 638  *
 639  * Return:      matching converted filename on success, otherwise error ptr
 640  */
 641 static char *
 642 smb2_get_name(const char *src, const int maxlen, struct nls_table *local_nls)
 643 {
 644         char *name;
 645
 646         name = smb_strndup_from_utf16(src, maxlen, 1, local_nls);
 647         if (IS_ERR(name)) {
 648                 pr_err("failed to get name %ld\n", PTR_ERR(name));
 649                 return name;
 650         }
 651
 652         ksmbd_conv_path_to_unix(name);
 653         ksmbd_strip_last_slash(name);
 654         return name;
 655 }
 656
 657 int setup_async_work(struct ksmbd_work *work, void (*fn)(void **), void **arg)
 658 {
 659         struct smb2_hdr *rsp_hdr;
 660         struct ksmbd_conn *conn = work->conn;
 661         int id;
 662
 663         rsp_hdr = ksmbd_resp_buf_next(work);
 664         rsp_hdr->Flags |= SMB2_FLAGS_ASYNC_COMMAND;
 665
 666         id = ksmbd_acquire_async_msg_id(&conn->async_ida);
 667         if (id < 0) {
 668                 pr_err("Failed to alloc async message id\n");
 669                 return id;
 670         }
 671         work->asynchronous = true;
 672         work->async_id = id;
 673         rsp_hdr->Id.AsyncId = cpu_to_le64(id);
 674
 675         ksmbd_debug(SMB,
 676                     "Send interim Response to inform async request id : %d\n",
 677                     work->async_id);
 678
 679         work->cancel_fn = fn;
 680         work->cancel_argv = arg;
 681
 682         if (list_empty(&work->async_request_entry)) {
 683                 spin_lock(&conn->request_lock);
 684                 list_add_tail(&work->async_request_entry, &conn->async_requests);
 685                 spin_unlock(&conn->request_lock);
 686         }
 687
 688         return 0;
 689 }
 690
 691 void release_async_work(struct ksmbd_work *work)
 692 {
 693         struct ksmbd_conn *conn = work->conn;
 694
 695         spin_lock(&conn->request_lock);
 696         list_del_init(&work->async_request_entry);
 697         spin_unlock(&conn->request_lock);
 698
 699         work->asynchronous = 0;
 700         work->cancel_fn = NULL;
 701         kfree(work->cancel_argv);
 702         work->cancel_argv = NULL;
 703         if (work->async_id) {
 704                 ksmbd_release_id(&conn->async_ida, work->async_id);
 705                 work->async_id = 0;
 706         }
 707 }
 708
 709 void smb2_send_interim_resp(struct ksmbd_work *work, __le32 status)
 710 {
 711         struct smb2_hdr *rsp_hdr;
 712         struct ksmbd_work *in_work = ksmbd_alloc_work_struct();
 713
 714         if (allocate_interim_rsp_buf(in_work)) {
 715                 pr_err("smb_allocate_rsp_buf failed!\n");
 716                 ksmbd_free_work_struct(in_work);
 717                 return;
 718         }
 719
 720         in_work->conn = work->conn;
 721         memcpy(smb2_get_msg(in_work->response_buf), ksmbd_resp_buf_next(work),
 722                __SMB2_HEADER_STRUCTURE_SIZE);
 723
 724         rsp_hdr = smb2_get_msg(in_work->response_buf);
 725         smb2_set_err_rsp(in_work);
 726         rsp_hdr->Status = status;
 727
 728         ksmbd_conn_write(in_work);
 729         ksmbd_free_work_struct(in_work);
 730 }
 731
 732 static __le32 smb2_get_reparse_tag_special_file(umode_t mode)
 733 {
 734         if (S_ISDIR(mode) || S_ISREG(mode))
 735                 return 0;
 736
 737         if (S_ISLNK(mode))
 738                 return IO_REPARSE_TAG_LX_SYMLINK_LE;
 739         else if (S_ISFIFO(mode))
 740                 return IO_REPARSE_TAG_LX_FIFO_LE;
 741         else if (S_ISSOCK(mode))
 742                 return IO_REPARSE_TAG_AF_UNIX_LE;
 743         else if (S_ISCHR(mode))
 744                 return IO_REPARSE_TAG_LX_CHR_LE;
 745         else if (S_ISBLK(mode))
 746                 return IO_REPARSE_TAG_LX_BLK_LE;
 747
 748         return 0;
 749 }
 750
 751 /**
 752  * smb2_get_dos_mode() - get file mode in dos format from unix mode
 753  * @stat:       kstat containing file mode
 754  * @attribute:  attribute flags
 755  *
 756  * Return:      converted dos mode
 757  */
 758 static int smb2_get_dos_mode(struct kstat *stat, int attribute)
 759 {
 760         int attr = 0;
 761
 762         if (S_ISDIR(stat->mode)) {
 763                 attr = FILE_ATTRIBUTE_DIRECTORY |
 764                         (attribute & (FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM));
 765         } else {
 766                 attr = (attribute & 0x00005137) | FILE_ATTRIBUTE_ARCHIVE;
 767                 attr &= ~(FILE_ATTRIBUTE_DIRECTORY);
 768                 if (S_ISREG(stat->mode) && (server_conf.share_fake_fscaps &
 769                                 FILE_SUPPORTS_SPARSE_FILES))
 770                         attr |= FILE_ATTRIBUTE_SPARSE_FILE;
 771
 772                 if (smb2_get_reparse_tag_special_file(stat->mode))
 773                         attr |= FILE_ATTRIBUTE_REPARSE_POINT;
 774         }
 775
 776         return attr;
 777 }
 778
 779 static void build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt,
 780                                __le16 hash_id)
 781 {
 782         pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES;
 783         pneg_ctxt->DataLength = cpu_to_le16(38);
 784         pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1);
 785         pneg_ctxt->Reserved = cpu_to_le32(0);
 786         pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE);
 787         get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE);
 788         pneg_ctxt->HashAlgorithms = hash_id;
 789 }
 790
 791 static void build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt,
 792                                __le16 cipher_type)
 793 {
 794         pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES;
 795         pneg_ctxt->DataLength = cpu_to_le16(4);
 796         pneg_ctxt->Reserved = cpu_to_le32(0);
 797         pneg_ctxt->CipherCount = cpu_to_le16(1);
 798         pneg_ctxt->Ciphers[0] = cipher_type;
 799 }
 800
 801 static void build_sign_cap_ctxt(struct smb2_signing_capabilities *pneg_ctxt,
 802                                 __le16 sign_algo)
 803 {
 804         pneg_ctxt->ContextType = SMB2_SIGNING_CAPABILITIES;
 805         pneg_ctxt->DataLength =
 806                 cpu_to_le16((sizeof(struct smb2_signing_capabilities) + 2)
 807                         - sizeof(struct smb2_neg_context));
 808         pneg_ctxt->Reserved = cpu_to_le32(0);
 809         pneg_ctxt->SigningAlgorithmCount = cpu_to_le16(1);
 810         pneg_ctxt->SigningAlgorithms[0] = sign_algo;
 811 }
 812
 813 static void build_posix_ctxt(struct smb2_posix_neg_context *pneg_ctxt)
 814 {
 815         pneg_ctxt->ContextType = SMB2_POSIX_EXTENSIONS_AVAILABLE;
 816         pneg_ctxt->DataLength = cpu_to_le16(POSIX_CTXT_DATA_LEN);
 817         /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */
 818         pneg_ctxt->Name[0] = 0x93;
 819         pneg_ctxt->Name[1] = 0xAD;
 820         pneg_ctxt->Name[2] = 0x25;
 821         pneg_ctxt->Name[3] = 0x50;
 822         pneg_ctxt->Name[4] = 0x9C;
 823         pneg_ctxt->Name[5] = 0xB4;
 824         pneg_ctxt->Name[6] = 0x11;
 825         pneg_ctxt->Name[7] = 0xE7;
 826         pneg_ctxt->Name[8] = 0xB4;
 827         pneg_ctxt->Name[9] = 0x23;
 828         pneg_ctxt->Name[10] = 0x83;
 829         pneg_ctxt->Name[11] = 0xDE;
 830         pneg_ctxt->Name[12] = 0x96;
 831         pneg_ctxt->Name[13] = 0x8B;
 832         pneg_ctxt->Name[14] = 0xCD;
 833         pneg_ctxt->Name[15] = 0x7C;
 834 }
 835
 836 static unsigned int assemble_neg_contexts(struct ksmbd_conn *conn,
 837                                   struct smb2_negotiate_rsp *rsp)
 838 {
 839         char * const pneg_ctxt = (char *)rsp +
 840                         le32_to_cpu(rsp->NegotiateContextOffset);
 841         int neg_ctxt_cnt = 1;
 842         int ctxt_size;
 843
 844         ksmbd_debug(SMB,
 845                     "assemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n");
 846         build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt,
 847                            conn->preauth_info->Preauth_HashId);
 848         ctxt_size = sizeof(struct smb2_preauth_neg_context);
 849
 850         if (conn->cipher_type) {
 851                 /* Round to 8 byte boundary */
 852                 ctxt_size = round_up(ctxt_size, 8);
 853                 ksmbd_debug(SMB,
 854                             "assemble SMB2_ENCRYPTION_CAPABILITIES context\n");
 855                 build_encrypt_ctxt((struct smb2_encryption_neg_context *)
 856                                    (pneg_ctxt + ctxt_size),
 857                                    conn->cipher_type);
 858                 neg_ctxt_cnt++;
 859                 ctxt_size += sizeof(struct smb2_encryption_neg_context) + 2;
 860         }
 861
 862         /* compression context not yet supported */
 863         WARN_ON(conn->compress_algorithm != SMB3_COMPRESS_NONE);
 864
 865         if (conn->posix_ext_supported) {
 866                 ctxt_size = round_up(ctxt_size, 8);
 867                 ksmbd_debug(SMB,
 868                             "assemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n");
 869                 build_posix_ctxt((struct smb2_posix_neg_context *)
 870                                  (pneg_ctxt + ctxt_size));
 871                 neg_ctxt_cnt++;
 872                 ctxt_size += sizeof(struct smb2_posix_neg_context);
 873         }
 874
 875         if (conn->signing_negotiated) {
 876                 ctxt_size = round_up(ctxt_size, 8);
 877                 ksmbd_debug(SMB,
 878                             "assemble SMB2_SIGNING_CAPABILITIES context\n");
 879                 build_sign_cap_ctxt((struct smb2_signing_capabilities *)
 880                                     (pneg_ctxt + ctxt_size),
 881                                     conn->signing_algorithm);
 882                 neg_ctxt_cnt++;
 883                 ctxt_size += sizeof(struct smb2_signing_capabilities) + 2;
 884         }
 885
 886         rsp->NegotiateContextCount = cpu_to_le16(neg_ctxt_cnt);
 887         return ctxt_size + AUTH_GSS_PADDING;
 888 }
 889
 890 static __le32 decode_preauth_ctxt(struct ksmbd_conn *conn,
 891                                   struct smb2_preauth_neg_context *pneg_ctxt,
 892                                   int ctxt_len)
 893 {
 894         /*
 895          * sizeof(smb2_preauth_neg_context) assumes SMB311_SALT_SIZE Salt,
 896          * which may not be present. Only check for used HashAlgorithms[1].
 897          */
 898         if (ctxt_len <
 899             sizeof(struct smb2_neg_context) + MIN_PREAUTH_CTXT_DATA_LEN)
 900                 return STATUS_INVALID_PARAMETER;
 901
 902         if (pneg_ctxt->HashAlgorithms != SMB2_PREAUTH_INTEGRITY_SHA512)
 903                 return STATUS_NO_PREAUTH_INTEGRITY_HASH_OVERLAP;
 904
 905         conn->preauth_info->Preauth_HashId = SMB2_PREAUTH_INTEGRITY_SHA512;
 906         return STATUS_SUCCESS;
 907 }
 908
 909 static void decode_encrypt_ctxt(struct ksmbd_conn *conn,
 910                                 struct smb2_encryption_neg_context *pneg_ctxt,
 911                                 int ctxt_len)
 912 {
 913         int cph_cnt;
 914         int i, cphs_size;
 915
 916         if (sizeof(struct smb2_encryption_neg_context) > ctxt_len) {
 917                 pr_err("Invalid SMB2_ENCRYPTION_CAPABILITIES context size\n");
 918                 return;
 919         }
 920
 921         conn->cipher_type = 0;
 922
 923         cph_cnt = le16_to_cpu(pneg_ctxt->CipherCount);
 924         cphs_size = cph_cnt * sizeof(__le16);
 925
 926         if (sizeof(struct smb2_encryption_neg_context) + cphs_size >
 927             ctxt_len) {
 928                 pr_err("Invalid cipher count(%d)\n", cph_cnt);
 929                 return;
 930         }
 931
 932         if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION_OFF)
 933                 return;
 934
 935         for (i = 0; i < cph_cnt; i++) {
 936                 if (pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_GCM ||
 937                     pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_CCM ||
 938                     pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_CCM ||
 939                     pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_GCM) {
 940                         ksmbd_debug(SMB, "Cipher ID = 0x%x\n",
 941                                     pneg_ctxt->Ciphers[i]);
 942                         conn->cipher_type = pneg_ctxt->Ciphers[i];
 943                         break;
 944                 }
 945         }
 946 }
 947
 948 /**
 949  * smb3_encryption_negotiated() - checks if server and client agreed on enabling encryption
 950  * @conn:       smb connection
 951  *
 952  * Return:      true if connection should be encrypted, else false
 953  */
 954 bool smb3_encryption_negotiated(struct ksmbd_conn *conn)
 955 {
 956         if (!conn->ops->generate_encryptionkey)
 957                 return false;
 958
 959         /*
 960          * SMB 3.0 and 3.0.2 dialects use the SMB2_GLOBAL_CAP_ENCRYPTION flag.
 961          * SMB 3.1.1 uses the cipher_type field.
 962          */
 963         return (conn->vals->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION) ||
 964             conn->cipher_type;
 965 }
 966
 967 static void decode_compress_ctxt(struct ksmbd_conn *conn,
 968                                  struct smb2_compression_capabilities_context *pneg_ctxt)
 969 {
 970         conn->compress_algorithm = SMB3_COMPRESS_NONE;
 971 }
 972
 973 static void decode_sign_cap_ctxt(struct ksmbd_conn *conn,
 974                                  struct smb2_signing_capabilities *pneg_ctxt,
 975                                  int ctxt_len)
 976 {
 977         int sign_algo_cnt;
 978         int i, sign_alos_size;
 979
 980         if (sizeof(struct smb2_signing_capabilities) > ctxt_len) {
 981                 pr_err("Invalid SMB2_SIGNING_CAPABILITIES context length\n");
 982                 return;
 983         }
 984
 985         conn->signing_negotiated = false;
 986         sign_algo_cnt = le16_to_cpu(pneg_ctxt->SigningAlgorithmCount);
 987         sign_alos_size = sign_algo_cnt * sizeof(__le16);
 988
 989         if (sizeof(struct smb2_signing_capabilities) + sign_alos_size >
 990             ctxt_len) {
 991                 pr_err("Invalid signing algorithm count(%d)\n", sign_algo_cnt);
 992                 return;
 993         }
 994
 995         for (i = 0; i < sign_algo_cnt; i++) {
 996                 if (pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_HMAC_SHA256_LE ||
 997                     pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_AES_CMAC_LE) {
 998                         ksmbd_debug(SMB, "Signing Algorithm ID = 0x%x\n",
 999                                     pneg_ctxt->SigningAlgorithms[i]);
1000                         conn->signing_negotiated = true;
1001                         conn->signing_algorithm =
1002                                 pneg_ctxt->SigningAlgorithms[i];
1003                         break;
1004                 }
1005         }
1006 }
1007
1008 static __le32 deassemble_neg_contexts(struct ksmbd_conn *conn,
1009                                       struct smb2_negotiate_req *req,
1010                                       unsigned int len_of_smb)
1011 {
1012         /* +4 is to account for the RFC1001 len field */
1013         struct smb2_neg_context *pctx = (struct smb2_neg_context *)req;
1014         int i = 0, len_of_ctxts;
1015         unsigned int offset = le32_to_cpu(req->NegotiateContextOffset);
1016         unsigned int neg_ctxt_cnt = le16_to_cpu(req->NegotiateContextCount);
1017         __le32 status = STATUS_INVALID_PARAMETER;
1018
1019         ksmbd_debug(SMB, "decoding %d negotiate contexts\n", neg_ctxt_cnt);
1020         if (len_of_smb <= offset) {
1021                 ksmbd_debug(SMB, "Invalid response: negotiate context offset\n");
1022                 return status;
1023         }
1024
1025         len_of_ctxts = len_of_smb - offset;
1026
1027         while (i++ < neg_ctxt_cnt) {
1028                 int clen, ctxt_len;
1029
1030                 if (len_of_ctxts < (int)sizeof(struct smb2_neg_context))
1031                         break;
1032
1033                 pctx = (struct smb2_neg_context *)((char *)pctx + offset);
1034                 clen = le16_to_cpu(pctx->DataLength);
1035                 ctxt_len = clen + sizeof(struct smb2_neg_context);
1036
1037                 if (ctxt_len > len_of_ctxts)
1038                         break;
1039
1040                 if (pctx->ContextType == SMB2_PREAUTH_INTEGRITY_CAPABILITIES) {
1041                         ksmbd_debug(SMB,
1042                                     "deassemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n");
1043                         if (conn->preauth_info->Preauth_HashId)
1044                                 break;
1045
1046                         status = decode_preauth_ctxt(conn,
1047                                                      (struct smb2_preauth_neg_context *)pctx,
1048                                                      ctxt_len);
1049                         if (status != STATUS_SUCCESS)
1050                                 break;
1051                 } else if (pctx->ContextType == SMB2_ENCRYPTION_CAPABILITIES) {
1052                         ksmbd_debug(SMB,
1053                                     "deassemble SMB2_ENCRYPTION_CAPABILITIES context\n");
1054                         if (conn->cipher_type)
1055                                 break;
1056
1057                         decode_encrypt_ctxt(conn,
1058                                             (struct smb2_encryption_neg_context *)pctx,
1059                                             ctxt_len);
1060                 } else if (pctx->ContextType == SMB2_COMPRESSION_CAPABILITIES) {
1061                         ksmbd_debug(SMB,
1062                                     "deassemble SMB2_COMPRESSION_CAPABILITIES context\n");
1063                         if (conn->compress_algorithm)
1064                                 break;
1065
1066                         decode_compress_ctxt(conn,
1067                                              (struct smb2_compression_capabilities_context *)pctx);
1068                 } else if (pctx->ContextType == SMB2_NETNAME_NEGOTIATE_CONTEXT_ID) {
1069                         ksmbd_debug(SMB,
1070                                     "deassemble SMB2_NETNAME_NEGOTIATE_CONTEXT_ID context\n");
1071                 } else if (pctx->ContextType == SMB2_POSIX_EXTENSIONS_AVAILABLE) {
1072                         ksmbd_debug(SMB,
1073                                     "deassemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n");
1074                         conn->posix_ext_supported = true;
1075                 } else if (pctx->ContextType == SMB2_SIGNING_CAPABILITIES) {
1076                         ksmbd_debug(SMB,
1077                                     "deassemble SMB2_SIGNING_CAPABILITIES context\n");
1078
1079                         decode_sign_cap_ctxt(conn,
1080                                              (struct smb2_signing_capabilities *)pctx,
1081                                              ctxt_len);
1082                 }
1083
1084                 /* offsets must be 8 byte aligned */
1085                 offset = (ctxt_len + 7) & ~0x7;
1086                 len_of_ctxts -= offset;
1087         }
1088         return status;
1089 }
1090
1091 /**
1092  * smb2_handle_negotiate() - handler for smb2 negotiate command
1093  * @work:       smb work containing smb request buffer
1094  *
1095  * Return:      0
1096  */
1097 int smb2_handle_negotiate(struct ksmbd_work *work)
1098 {
1099         struct ksmbd_conn *conn = work->conn;
1100         struct smb2_negotiate_req *req = smb2_get_msg(work->request_buf);
1101         struct smb2_negotiate_rsp *rsp = smb2_get_msg(work->response_buf);
1102         int rc = 0;
1103         unsigned int smb2_buf_len, smb2_neg_size, neg_ctxt_len = 0;
1104         __le32 status;
1105
1106         ksmbd_debug(SMB, "Received negotiate request\n");
1107         conn->need_neg = false;
1108         if (ksmbd_conn_good(conn)) {
1109                 pr_err("conn->tcp_status is already in CifsGood State\n");
1110                 work->send_no_response = 1;
1111                 return rc;
1112         }
1113
1114         smb2_buf_len = get_rfc1002_len(work->request_buf);
1115         smb2_neg_size = offsetof(struct smb2_negotiate_req, Dialects);
1116         if (smb2_neg_size > smb2_buf_len) {
1117                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1118                 rc = -EINVAL;
1119                 goto err_out;
1120         }
1121
1122         if (req->DialectCount == 0) {
1123                 pr_err("malformed packet\n");
1124                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1125                 rc = -EINVAL;
1126                 goto err_out;
1127         }
1128
1129         if (conn->dialect == SMB311_PROT_ID) {
1130                 unsigned int nego_ctxt_off = le32_to_cpu(req->NegotiateContextOffset);
1131
1132                 if (smb2_buf_len < nego_ctxt_off) {
1133                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1134                         rc = -EINVAL;
1135                         goto err_out;
1136                 }
1137
1138                 if (smb2_neg_size > nego_ctxt_off) {
1139                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1140                         rc = -EINVAL;
1141                         goto err_out;
1142                 }
1143
1144                 if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) >
1145                     nego_ctxt_off) {
1146                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1147                         rc = -EINVAL;
1148                         goto err_out;
1149                 }
1150         } else {
1151                 if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) >
1152                     smb2_buf_len) {
1153                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1154                         rc = -EINVAL;
1155                         goto err_out;
1156                 }
1157         }
1158
1159         conn->cli_cap = le32_to_cpu(req->Capabilities);
1160         switch (conn->dialect) {
1161         case SMB311_PROT_ID:
1162                 conn->preauth_info =
1163                         kzalloc(sizeof(struct preauth_integrity_info),
1164                                 GFP_KERNEL);
1165                 if (!conn->preauth_info) {
1166                         rc = -ENOMEM;
1167                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1168                         goto err_out;
1169                 }
1170
1171                 status = deassemble_neg_contexts(conn, req,
1172                                                  get_rfc1002_len(work->request_buf));
1173                 if (status != STATUS_SUCCESS) {
1174                         pr_err("deassemble_neg_contexts error(0x%x)\n",
1175                                status);
1176                         rsp->hdr.Status = status;
1177                         rc = -EINVAL;
1178                         kfree(conn->preauth_info);
1179                         conn->preauth_info = NULL;
1180                         goto err_out;
1181                 }
1182
1183                 rc = init_smb3_11_server(conn);
1184                 if (rc < 0) {
1185                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1186                         kfree(conn->preauth_info);
1187                         conn->preauth_info = NULL;
1188                         goto err_out;
1189                 }
1190
1191                 ksmbd_gen_preauth_integrity_hash(conn,
1192                                                  work->request_buf,
1193                                                  conn->preauth_info->Preauth_HashValue);
1194                 rsp->NegotiateContextOffset =
1195                                 cpu_to_le32(OFFSET_OF_NEG_CONTEXT);
1196                 neg_ctxt_len = assemble_neg_contexts(conn, rsp);
1197                 break;
1198         case SMB302_PROT_ID:
1199                 init_smb3_02_server(conn);
1200                 break;
1201         case SMB30_PROT_ID:
1202                 init_smb3_0_server(conn);
1203                 break;
1204         case SMB21_PROT_ID:
1205                 init_smb2_1_server(conn);
1206                 break;
1207         case SMB2X_PROT_ID:
1208         case BAD_PROT_ID:
1209         default:
1210                 ksmbd_debug(SMB, "Server dialect :0x%x not supported\n",
1211                             conn->dialect);
1212                 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
1213                 rc = -EINVAL;
1214                 goto err_out;
1215         }
1216         rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
1217
1218         /* For stats */
1219         conn->connection_type = conn->dialect;
1220
1221         rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size);
1222         rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size);
1223         rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size);
1224
1225         memcpy(conn->ClientGUID, req->ClientGUID,
1226                         SMB2_CLIENT_GUID_SIZE);
1227         conn->cli_sec_mode = le16_to_cpu(req->SecurityMode);
1228
1229         rsp->StructureSize = cpu_to_le16(65);
1230         rsp->DialectRevision = cpu_to_le16(conn->dialect);
1231         /* Not setting conn guid rsp->ServerGUID, as it
1232          * not used by client for identifying server
1233          */
1234         memset(rsp->ServerGUID, 0, SMB2_CLIENT_GUID_SIZE);
1235
1236         rsp->SystemTime = cpu_to_le64(ksmbd_systime());
1237         rsp->ServerStartTime = 0;
1238         ksmbd_debug(SMB, "negotiate context offset %d, count %d\n",
1239                     le32_to_cpu(rsp->NegotiateContextOffset),
1240                     le16_to_cpu(rsp->NegotiateContextCount));
1241
1242         rsp->SecurityBufferOffset = cpu_to_le16(128);
1243         rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH);
1244         ksmbd_copy_gss_neg_header((char *)(&rsp->hdr) +
1245                                   le16_to_cpu(rsp->SecurityBufferOffset));
1246
1247         rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE;
1248         conn->use_spnego = true;
1249
1250         if ((server_conf.signing == KSMBD_CONFIG_OPT_AUTO ||
1251              server_conf.signing == KSMBD_CONFIG_OPT_DISABLED) &&
1252             req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED_LE)
1253                 conn->sign = true;
1254         else if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY) {
1255                 server_conf.enforced_signing = true;
1256                 rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE;
1257                 conn->sign = true;
1258         }
1259
1260         conn->srv_sec_mode = le16_to_cpu(rsp->SecurityMode);
1261         ksmbd_conn_set_need_negotiate(conn);
1262
1263 err_out:
1264         if (rc)
1265                 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
1266
1267         if (!rc)
1268                 rc = ksmbd_iov_pin_rsp(work, rsp,
1269                                        sizeof(struct smb2_negotiate_rsp) +
1270                                         AUTH_GSS_LENGTH + neg_ctxt_len);
1271         if (rc < 0)
1272                 smb2_set_err_rsp(work);
1273         return rc;
1274 }
1275
1276 static int alloc_preauth_hash(struct ksmbd_session *sess,
1277                               struct ksmbd_conn *conn)
1278 {
1279         if (sess->Preauth_HashValue)
1280                 return 0;
1281
1282         sess->Preauth_HashValue = kmemdup(conn->preauth_info->Preauth_HashValue,
1283                                           PREAUTH_HASHVALUE_SIZE, GFP_KERNEL);
1284         if (!sess->Preauth_HashValue)
1285                 return -ENOMEM;
1286
1287         return 0;
1288 }
1289
1290 static int generate_preauth_hash(struct ksmbd_work *work)
1291 {
1292         struct ksmbd_conn *conn = work->conn;
1293         struct ksmbd_session *sess = work->sess;
1294         u8 *preauth_hash;
1295
1296         if (conn->dialect != SMB311_PROT_ID)
1297                 return 0;
1298
1299         if (conn->binding) {
1300                 struct preauth_session *preauth_sess;
1301
1302                 preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id);
1303                 if (!preauth_sess) {
1304                         preauth_sess = ksmbd_preauth_session_alloc(conn, sess->id);
1305                         if (!preauth_sess)
1306                                 return -ENOMEM;
1307                 }
1308
1309                 preauth_hash = preauth_sess->Preauth_HashValue;
1310         } else {
1311                 if (!sess->Preauth_HashValue)
1312                         if (alloc_preauth_hash(sess, conn))
1313                                 return -ENOMEM;
1314                 preauth_hash = sess->Preauth_HashValue;
1315         }
1316
1317         ksmbd_gen_preauth_integrity_hash(conn, work->request_buf, preauth_hash);
1318         return 0;
1319 }
1320
1321 static int decode_negotiation_token(struct ksmbd_conn *conn,
1322                                     struct negotiate_message *negblob,
1323                                     size_t sz)
1324 {
1325         if (!conn->use_spnego)
1326                 return -EINVAL;
1327
1328         if (ksmbd_decode_negTokenInit((char *)negblob, sz, conn)) {
1329                 if (ksmbd_decode_negTokenTarg((char *)negblob, sz, conn)) {
1330                         conn->auth_mechs |= KSMBD_AUTH_NTLMSSP;
1331                         conn->preferred_auth_mech = KSMBD_AUTH_NTLMSSP;
1332                         conn->use_spnego = false;
1333                 }
1334         }
1335         return 0;
1336 }
1337
1338 static int ntlm_negotiate(struct ksmbd_work *work,
1339                           struct negotiate_message *negblob,
1340                           size_t negblob_len, struct smb2_sess_setup_rsp *rsp)
1341 {
1342         struct challenge_message *chgblob;
1343         unsigned char *spnego_blob = NULL;
1344         u16 spnego_blob_len;
1345         char *neg_blob;
1346         int sz, rc;
1347
1348         ksmbd_debug(SMB, "negotiate phase\n");
1349         rc = ksmbd_decode_ntlmssp_neg_blob(negblob, negblob_len, work->conn);
1350         if (rc)
1351                 return rc;
1352
1353         sz = le16_to_cpu(rsp->SecurityBufferOffset);
1354         chgblob =
1355                 (struct challenge_message *)((char *)&rsp->hdr.ProtocolId + sz);
1356         memset(chgblob, 0, sizeof(struct challenge_message));
1357
1358         if (!work->conn->use_spnego) {
1359                 sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn);
1360                 if (sz < 0)
1361                         return -ENOMEM;
1362
1363                 rsp->SecurityBufferLength = cpu_to_le16(sz);
1364                 return 0;
1365         }
1366
1367         sz = sizeof(struct challenge_message);
1368         sz += (strlen(ksmbd_netbios_name()) * 2 + 1 + 4) * 6;
1369
1370         neg_blob = kzalloc(sz, GFP_KERNEL);
1371         if (!neg_blob)
1372                 return -ENOMEM;
1373
1374         chgblob = (struct challenge_message *)neg_blob;
1375         sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn);
1376         if (sz < 0) {
1377                 rc = -ENOMEM;
1378                 goto out;
1379         }
1380
1381         rc = build_spnego_ntlmssp_neg_blob(&spnego_blob, &spnego_blob_len,
1382                                            neg_blob, sz);
1383         if (rc) {
1384                 rc = -ENOMEM;
1385                 goto out;
1386         }
1387
1388         sz = le16_to_cpu(rsp->SecurityBufferOffset);
1389         memcpy((char *)&rsp->hdr.ProtocolId + sz, spnego_blob, spnego_blob_len);
1390         rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len);
1391
1392 out:
1393         kfree(spnego_blob);
1394         kfree(neg_blob);
1395         return rc;
1396 }
1397
1398 static struct authenticate_message *user_authblob(struct ksmbd_conn *conn,
1399                                                   struct smb2_sess_setup_req *req)
1400 {
1401         int sz;
1402
1403         if (conn->use_spnego && conn->mechToken)
1404                 return (struct authenticate_message *)conn->mechToken;
1405
1406         sz = le16_to_cpu(req->SecurityBufferOffset);
1407         return (struct authenticate_message *)((char *)&req->hdr.ProtocolId
1408                                                + sz);
1409 }
1410
1411 static struct ksmbd_user *session_user(struct ksmbd_conn *conn,
1412                                        struct smb2_sess_setup_req *req)
1413 {
1414         struct authenticate_message *authblob;
1415         struct ksmbd_user *user;
1416         char *name;
1417         unsigned int name_off, name_len, secbuf_len;
1418
1419         secbuf_len = le16_to_cpu(req->SecurityBufferLength);
1420         if (secbuf_len < sizeof(struct authenticate_message)) {
1421                 ksmbd_debug(SMB, "blob len %d too small\n", secbuf_len);
1422                 return NULL;
1423         }
1424         authblob = user_authblob(conn, req);
1425         name_off = le32_to_cpu(authblob->UserName.BufferOffset);
1426         name_len = le16_to_cpu(authblob->UserName.Length);
1427
1428         if (secbuf_len < (u64)name_off + name_len)
1429                 return NULL;
1430
1431         name = smb_strndup_from_utf16((const char *)authblob + name_off,
1432                                       name_len,
1433                                       true,
1434                                       conn->local_nls);
1435         if (IS_ERR(name)) {
1436                 pr_err("cannot allocate memory\n");
1437                 return NULL;
1438         }
1439
1440         ksmbd_debug(SMB, "session setup request for user %s\n", name);
1441         user = ksmbd_login_user(name);
1442         kfree(name);
1443         return user;
1444 }
1445
1446 static int ntlm_authenticate(struct ksmbd_work *work,
1447                              struct smb2_sess_setup_req *req,
1448                              struct smb2_sess_setup_rsp *rsp)
1449 {
1450         struct ksmbd_conn *conn = work->conn;
1451         struct ksmbd_session *sess = work->sess;
1452         struct channel *chann = NULL;
1453         struct ksmbd_user *user;
1454         u64 prev_id;
1455         int sz, rc;
1456
1457         ksmbd_debug(SMB, "authenticate phase\n");
1458         if (conn->use_spnego) {
1459                 unsigned char *spnego_blob;
1460                 u16 spnego_blob_len;
1461
1462                 rc = build_spnego_ntlmssp_auth_blob(&spnego_blob,
1463                                                     &spnego_blob_len,
1464                                                     0);
1465                 if (rc)
1466                         return -ENOMEM;
1467
1468                 sz = le16_to_cpu(rsp->SecurityBufferOffset);
1469                 memcpy((char *)&rsp->hdr.ProtocolId + sz, spnego_blob, spnego_blob_len);
1470                 rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len);
1471                 kfree(spnego_blob);
1472         }
1473
1474         user = session_user(conn, req);
1475         if (!user) {
1476                 ksmbd_debug(SMB, "Unknown user name or an error\n");
1477                 return -EPERM;
1478         }
1479
1480         /* Check for previous session */
1481         prev_id = le64_to_cpu(req->PreviousSessionId);
1482         if (prev_id && prev_id != sess->id)
1483                 destroy_previous_session(conn, user, prev_id);
1484
1485         if (sess->state == SMB2_SESSION_VALID) {
1486                 /*
1487                  * Reuse session if anonymous try to connect
1488                  * on reauthetication.
1489                  */
1490                 if (conn->binding == false && ksmbd_anonymous_user(user)) {
1491                         ksmbd_free_user(user);
1492                         return 0;
1493                 }
1494
1495                 if (!ksmbd_compare_user(sess->user, user)) {
1496                         ksmbd_free_user(user);
1497                         return -EPERM;
1498                 }
1499                 ksmbd_free_user(user);
1500         } else {
1501                 sess->user = user;
1502         }
1503
1504         if (conn->binding == false && user_guest(sess->user)) {
1505                 rsp->SessionFlags = SMB2_SESSION_FLAG_IS_GUEST_LE;
1506         } else {
1507                 struct authenticate_message *authblob;
1508
1509                 authblob = user_authblob(conn, req);
1510                 sz = le16_to_cpu(req->SecurityBufferLength);
1511                 rc = ksmbd_decode_ntlmssp_auth_blob(authblob, sz, conn, sess);
1512                 if (rc) {
1513                         set_user_flag(sess->user, KSMBD_USER_FLAG_BAD_PASSWORD);
1514                         ksmbd_debug(SMB, "authentication failed\n");
1515                         return -EPERM;
1516                 }
1517         }
1518
1519         /*
1520          * If session state is SMB2_SESSION_VALID, We can assume
1521          * that it is reauthentication. And the user/password
1522          * has been verified, so return it here.
1523          */
1524         if (sess->state == SMB2_SESSION_VALID) {
1525                 if (conn->binding)
1526                         goto binding_session;
1527                 return 0;
1528         }
1529
1530         if ((rsp->SessionFlags != SMB2_SESSION_FLAG_IS_GUEST_LE &&
1531              (conn->sign || server_conf.enforced_signing)) ||
1532             (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED))
1533                 sess->sign = true;
1534
1535         if (smb3_encryption_negotiated(conn) &&
1536                         !(req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) {
1537                 rc = conn->ops->generate_encryptionkey(conn, sess);
1538                 if (rc) {
1539                         ksmbd_debug(SMB,
1540                                         "SMB3 encryption key generation failed\n");
1541                         return -EINVAL;
1542                 }
1543                 sess->enc = true;
1544                 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION)
1545                         rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE;
1546                 /*
1547                  * signing is disable if encryption is enable
1548                  * on this session
1549                  */
1550                 sess->sign = false;
1551         }
1552
1553 binding_session:
1554         if (conn->dialect >= SMB30_PROT_ID) {
1555                 chann = lookup_chann_list(sess, conn);
1556                 if (!chann) {
1557                         chann = kmalloc(sizeof(struct channel), GFP_KERNEL);
1558                         if (!chann)
1559                                 return -ENOMEM;
1560
1561                         chann->conn = conn;
1562                         xa_store(&sess->ksmbd_chann_list, (long)conn, chann, GFP_KERNEL);
1563                 }
1564         }
1565
1566         if (conn->ops->generate_signingkey) {
1567                 rc = conn->ops->generate_signingkey(sess, conn);
1568                 if (rc) {
1569                         ksmbd_debug(SMB, "SMB3 signing key generation failed\n");
1570                         return -EINVAL;
1571                 }
1572         }
1573
1574         if (!ksmbd_conn_lookup_dialect(conn)) {
1575                 pr_err("fail to verify the dialect\n");
1576                 return -ENOENT;
1577         }
1578         return 0;
1579 }
1580
1581 #ifdef CONFIG_SMB_SERVER_KERBEROS5
1582 static int krb5_authenticate(struct ksmbd_work *work,
1583                              struct smb2_sess_setup_req *req,
1584                              struct smb2_sess_setup_rsp *rsp)
1585 {
1586         struct ksmbd_conn *conn = work->conn;
1587         struct ksmbd_session *sess = work->sess;
1588         char *in_blob, *out_blob;
1589         struct channel *chann = NULL;
1590         u64 prev_sess_id;
1591         int in_len, out_len;
1592         int retval;
1593
1594         in_blob = (char *)&req->hdr.ProtocolId +
1595                 le16_to_cpu(req->SecurityBufferOffset);
1596         in_len = le16_to_cpu(req->SecurityBufferLength);
1597         out_blob = (char *)&rsp->hdr.ProtocolId +
1598                 le16_to_cpu(rsp->SecurityBufferOffset);
1599         out_len = work->response_sz -
1600                 (le16_to_cpu(rsp->SecurityBufferOffset) + 4);
1601
1602         /* Check previous session */
1603         prev_sess_id = le64_to_cpu(req->PreviousSessionId);
1604         if (prev_sess_id && prev_sess_id != sess->id)
1605                 destroy_previous_session(conn, sess->user, prev_sess_id);
1606
1607         if (sess->state == SMB2_SESSION_VALID)
1608                 ksmbd_free_user(sess->user);
1609
1610         retval = ksmbd_krb5_authenticate(sess, in_blob, in_len,
1611                                          out_blob, &out_len);
1612         if (retval) {
1613                 ksmbd_debug(SMB, "krb5 authentication failed\n");
1614                 return -EINVAL;
1615         }
1616         rsp->SecurityBufferLength = cpu_to_le16(out_len);
1617
1618         if ((conn->sign || server_conf.enforced_signing) ||
1619             (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED))
1620                 sess->sign = true;
1621
1622         if (smb3_encryption_negotiated(conn)) {
1623                 retval = conn->ops->generate_encryptionkey(conn, sess);
1624                 if (retval) {
1625                         ksmbd_debug(SMB,
1626                                     "SMB3 encryption key generation failed\n");
1627                         return -EINVAL;
1628                 }
1629                 sess->enc = true;
1630                 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION)
1631                         rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE;
1632                 sess->sign = false;
1633         }
1634
1635         if (conn->dialect >= SMB30_PROT_ID) {
1636                 chann = lookup_chann_list(sess, conn);
1637                 if (!chann) {
1638                         chann = kmalloc(sizeof(struct channel), GFP_KERNEL);
1639                         if (!chann)
1640                                 return -ENOMEM;
1641
1642                         chann->conn = conn;
1643                         xa_store(&sess->ksmbd_chann_list, (long)conn, chann, GFP_KERNEL);
1644                 }
1645         }
1646
1647         if (conn->ops->generate_signingkey) {
1648                 retval = conn->ops->generate_signingkey(sess, conn);
1649                 if (retval) {
1650                         ksmbd_debug(SMB, "SMB3 signing key generation failed\n");
1651                         return -EINVAL;
1652                 }
1653         }
1654
1655         if (!ksmbd_conn_lookup_dialect(conn)) {
1656                 pr_err("fail to verify the dialect\n");
1657                 return -ENOENT;
1658         }
1659         return 0;
1660 }
1661 #else
1662 static int krb5_authenticate(struct ksmbd_work *work,
1663                              struct smb2_sess_setup_req *req,
1664                              struct smb2_sess_setup_rsp *rsp)
1665 {
1666         return -EOPNOTSUPP;
1667 }
1668 #endif
1669
1670 int smb2_sess_setup(struct ksmbd_work *work)
1671 {
1672         struct ksmbd_conn *conn = work->conn;
1673         struct smb2_sess_setup_req *req;
1674         struct smb2_sess_setup_rsp *rsp;
1675         struct ksmbd_session *sess;
1676         struct negotiate_message *negblob;
1677         unsigned int negblob_len, negblob_off;
1678         int rc = 0;
1679
1680         ksmbd_debug(SMB, "Received request for session setup\n");
1681
1682         WORK_BUFFERS(work, req, rsp);
1683
1684         rsp->StructureSize = cpu_to_le16(9);
1685         rsp->SessionFlags = 0;
1686         rsp->SecurityBufferOffset = cpu_to_le16(72);
1687         rsp->SecurityBufferLength = 0;
1688
1689         ksmbd_conn_lock(conn);
1690         if (!req->hdr.SessionId) {
1691                 sess = ksmbd_smb2_session_create();
1692                 if (!sess) {
1693                         rc = -ENOMEM;
1694                         goto out_err;
1695                 }
1696                 rsp->hdr.SessionId = cpu_to_le64(sess->id);
1697                 rc = ksmbd_session_register(conn, sess);
1698                 if (rc)
1699                         goto out_err;
1700         } else if (conn->dialect >= SMB30_PROT_ID &&
1701                    (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) &&
1702                    req->Flags & SMB2_SESSION_REQ_FLAG_BINDING) {
1703                 u64 sess_id = le64_to_cpu(req->hdr.SessionId);
1704
1705                 sess = ksmbd_session_lookup_slowpath(sess_id);
1706                 if (!sess) {
1707                         rc = -ENOENT;
1708                         goto out_err;
1709                 }
1710
1711                 if (conn->dialect != sess->dialect) {
1712                         rc = -EINVAL;
1713                         goto out_err;
1714                 }
1715
1716                 if (!(req->hdr.Flags & SMB2_FLAGS_SIGNED)) {
1717                         rc = -EINVAL;
1718                         goto out_err;
1719                 }
1720
1721                 if (strncmp(conn->ClientGUID, sess->ClientGUID,
1722                             SMB2_CLIENT_GUID_SIZE)) {
1723                         rc = -ENOENT;
1724                         goto out_err;
1725                 }
1726
1727                 if (sess->state == SMB2_SESSION_IN_PROGRESS) {
1728                         rc = -EACCES;
1729                         goto out_err;
1730                 }
1731
1732                 if (sess->state == SMB2_SESSION_EXPIRED) {
1733                         rc = -EFAULT;
1734                         goto out_err;
1735                 }
1736
1737                 if (ksmbd_conn_need_reconnect(conn)) {
1738                         rc = -EFAULT;
1739                         sess = NULL;
1740                         goto out_err;
1741                 }
1742
1743                 if (ksmbd_session_lookup(conn, sess_id)) {
1744                         rc = -EACCES;
1745                         goto out_err;
1746                 }
1747
1748                 if (user_guest(sess->user)) {
1749                         rc = -EOPNOTSUPP;
1750                         goto out_err;
1751                 }
1752
1753                 conn->binding = true;
1754         } else if ((conn->dialect < SMB30_PROT_ID ||
1755                     server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) &&
1756                    (req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) {
1757                 sess = NULL;
1758                 rc = -EACCES;
1759                 goto out_err;
1760         } else {
1761                 sess = ksmbd_session_lookup(conn,
1762                                             le64_to_cpu(req->hdr.SessionId));
1763                 if (!sess) {
1764                         rc = -ENOENT;
1765                         goto out_err;
1766                 }
1767
1768                 if (sess->state == SMB2_SESSION_EXPIRED) {
1769                         rc = -EFAULT;
1770                         goto out_err;
1771                 }
1772
1773                 if (ksmbd_conn_need_reconnect(conn)) {
1774                         rc = -EFAULT;
1775                         sess = NULL;
1776                         goto out_err;
1777                 }
1778         }
1779         work->sess = sess;
1780
1781         negblob_off = le16_to_cpu(req->SecurityBufferOffset);
1782         negblob_len = le16_to_cpu(req->SecurityBufferLength);
1783         if (negblob_off < offsetof(struct smb2_sess_setup_req, Buffer) ||
1784             negblob_len < offsetof(struct negotiate_message, NegotiateFlags)) {
1785                 rc = -EINVAL;
1786                 goto out_err;
1787         }
1788
1789         negblob = (struct negotiate_message *)((char *)&req->hdr.ProtocolId +
1790                         negblob_off);
1791
1792         if (decode_negotiation_token(conn, negblob, negblob_len) == 0) {
1793                 if (conn->mechToken)
1794                         negblob = (struct negotiate_message *)conn->mechToken;
1795         }
1796
1797         if (server_conf.auth_mechs & conn->auth_mechs) {
1798                 rc = generate_preauth_hash(work);
1799                 if (rc)
1800                         goto out_err;
1801
1802                 if (conn->preferred_auth_mech &
1803                                 (KSMBD_AUTH_KRB5 | KSMBD_AUTH_MSKRB5)) {
1804                         rc = krb5_authenticate(work, req, rsp);
1805                         if (rc) {
1806                                 rc = -EINVAL;
1807                                 goto out_err;
1808                         }
1809
1810                         if (!ksmbd_conn_need_reconnect(conn)) {
1811                                 ksmbd_conn_set_good(conn);
1812                                 sess->state = SMB2_SESSION_VALID;
1813                         }
1814                         kfree(sess->Preauth_HashValue);
1815                         sess->Preauth_HashValue = NULL;
1816                 } else if (conn->preferred_auth_mech == KSMBD_AUTH_NTLMSSP) {
1817                         if (negblob->MessageType == NtLmNegotiate) {
1818                                 rc = ntlm_negotiate(work, negblob, negblob_len, rsp);
1819                                 if (rc)
1820                                         goto out_err;
1821                                 rsp->hdr.Status =
1822                                         STATUS_MORE_PROCESSING_REQUIRED;
1823                         } else if (negblob->MessageType == NtLmAuthenticate) {
1824                                 rc = ntlm_authenticate(work, req, rsp);
1825                                 if (rc)
1826                                         goto out_err;
1827
1828                                 if (!ksmbd_conn_need_reconnect(conn)) {
1829                                         ksmbd_conn_set_good(conn);
1830                                         sess->state = SMB2_SESSION_VALID;
1831                                 }
1832                                 if (conn->binding) {
1833                                         struct preauth_session *preauth_sess;
1834
1835                                         preauth_sess =
1836                                                 ksmbd_preauth_session_lookup(conn, sess->id);
1837                                         if (preauth_sess) {
1838                                                 list_del(&preauth_sess->preauth_entry);
1839                                                 kfree(preauth_sess);
1840                                         }
1841                                 }
1842                                 kfree(sess->Preauth_HashValue);
1843                                 sess->Preauth_HashValue = NULL;
1844                         } else {
1845                                 pr_info_ratelimited("Unknown NTLMSSP message type : 0x%x\n",
1846                                                 le32_to_cpu(negblob->MessageType));
1847                                 rc = -EINVAL;
1848                         }
1849                 } else {
1850                         /* TODO: need one more negotiation */
1851                         pr_err("Not support the preferred authentication\n");
1852                         rc = -EINVAL;
1853                 }
1854         } else {
1855                 pr_err("Not support authentication\n");
1856                 rc = -EINVAL;
1857         }
1858
1859 out_err:
1860         if (rc == -EINVAL)
1861                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1862         else if (rc == -ENOENT)
1863                 rsp->hdr.Status = STATUS_USER_SESSION_DELETED;
1864         else if (rc == -EACCES)
1865                 rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED;
1866         else if (rc == -EFAULT)
1867                 rsp->hdr.Status = STATUS_NETWORK_SESSION_EXPIRED;
1868         else if (rc == -ENOMEM)
1869                 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
1870         else if (rc == -EOPNOTSUPP)
1871                 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
1872         else if (rc)
1873                 rsp->hdr.Status = STATUS_LOGON_FAILURE;
1874
1875         if (conn->use_spnego && conn->mechToken) {
1876                 kfree(conn->mechToken);
1877                 conn->mechToken = NULL;
1878         }
1879
1880         if (rc < 0) {
1881                 /*
1882                  * SecurityBufferOffset should be set to zero
1883                  * in session setup error response.
1884                  */
1885                 rsp->SecurityBufferOffset = 0;
1886
1887                 if (sess) {
1888                         bool try_delay = false;
1889
1890                         /*
1891                          * To avoid dictionary attacks (repeated session setups rapidly sent) to
1892                          * connect to server, ksmbd make a delay of a 5 seconds on session setup
1893                          * failure to make it harder to send enough random connection requests
1894                          * to break into a server.
1895                          */
1896                         if (sess->user && sess->user->flags & KSMBD_USER_FLAG_DELAY_SESSION)
1897                                 try_delay = true;
1898
1899                         sess->last_active = jiffies;
1900                         sess->state = SMB2_SESSION_EXPIRED;
1901                         if (try_delay) {
1902                                 ksmbd_conn_set_need_reconnect(conn);
1903                                 ssleep(5);
1904                                 ksmbd_conn_set_need_negotiate(conn);
1905                         }
1906                 }
1907                 smb2_set_err_rsp(work);
1908         } else {
1909                 unsigned int iov_len;
1910
1911                 if (rsp->SecurityBufferLength)
1912                         iov_len = offsetof(struct smb2_sess_setup_rsp, Buffer) +
1913                                 le16_to_cpu(rsp->SecurityBufferLength);
1914                 else
1915                         iov_len = sizeof(struct smb2_sess_setup_rsp);
1916                 rc = ksmbd_iov_pin_rsp(work, rsp, iov_len);
1917                 if (rc)
1918                         rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
1919         }
1920
1921         ksmbd_conn_unlock(conn);
1922         return rc;
1923 }
1924
1925 /**
1926  * smb2_tree_connect() - handler for smb2 tree connect command
1927  * @work:       smb work containing smb request buffer
1928  *
1929  * Return:      0 on success, otherwise error
1930  */
1931 int smb2_tree_connect(struct ksmbd_work *work)
1932 {
1933         struct ksmbd_conn *conn = work->conn;
1934         struct smb2_tree_connect_req *req;
1935         struct smb2_tree_connect_rsp *rsp;
1936         struct ksmbd_session *sess = work->sess;
1937         char *treename = NULL, *name = NULL;
1938         struct ksmbd_tree_conn_status status;
1939         struct ksmbd_share_config *share;
1940         int rc = -EINVAL;
1941
1942         WORK_BUFFERS(work, req, rsp);
1943
1944         treename = smb_strndup_from_utf16(req->Buffer,
1945                                           le16_to_cpu(req->PathLength), true,
1946                                           conn->local_nls);
1947         if (IS_ERR(treename)) {
1948                 pr_err("treename is NULL\n");
1949                 status.ret = KSMBD_TREE_CONN_STATUS_ERROR;
1950                 goto out_err1;
1951         }
1952
1953         name = ksmbd_extract_sharename(conn->um, treename);
1954         if (IS_ERR(name)) {
1955                 status.ret = KSMBD_TREE_CONN_STATUS_ERROR;
1956                 goto out_err1;
1957         }
1958
1959         ksmbd_debug(SMB, "tree connect request for tree %s treename %s\n",
1960                     name, treename);
1961
1962         status = ksmbd_tree_conn_connect(conn, sess, name);
1963         if (status.ret == KSMBD_TREE_CONN_STATUS_OK)
1964                 rsp->hdr.Id.SyncId.TreeId = cpu_to_le32(status.tree_conn->id);
1965         else
1966                 goto out_err1;
1967
1968         share = status.tree_conn->share_conf;
1969         if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) {
1970                 ksmbd_debug(SMB, "IPC share path request\n");
1971                 rsp->ShareType = SMB2_SHARE_TYPE_PIPE;
1972                 rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE |
1973                         FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE |
1974                         FILE_DELETE_LE | FILE_READ_CONTROL_LE |
1975                         FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE |
1976                         FILE_SYNCHRONIZE_LE;
1977         } else {
1978                 rsp->ShareType = SMB2_SHARE_TYPE_DISK;
1979                 rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE |
1980                         FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE;
1981                 if (test_tree_conn_flag(status.tree_conn,
1982                                         KSMBD_TREE_CONN_FLAG_WRITABLE)) {
1983                         rsp->MaximalAccess |= FILE_WRITE_DATA_LE |
1984                                 FILE_APPEND_DATA_LE | FILE_WRITE_EA_LE |
1985                                 FILE_DELETE_LE | FILE_WRITE_ATTRIBUTES_LE |
1986                                 FILE_DELETE_CHILD_LE | FILE_READ_CONTROL_LE |
1987                                 FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE |
1988                                 FILE_SYNCHRONIZE_LE;
1989                 }
1990         }
1991
1992         status.tree_conn->maximal_access = le32_to_cpu(rsp->MaximalAccess);
1993         if (conn->posix_ext_supported)
1994                 status.tree_conn->posix_extensions = true;
1995
1996         rsp->StructureSize = cpu_to_le16(16);
1997 out_err1:
1998         rsp->Capabilities = 0;
1999         rsp->Reserved = 0;
2000         /* default manual caching */
2001         rsp->ShareFlags = SMB2_SHAREFLAG_MANUAL_CACHING;
2002
2003         rc = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_tree_connect_rsp));
2004         if (rc)
2005                 status.ret = KSMBD_TREE_CONN_STATUS_NOMEM;
2006
2007         if (!IS_ERR(treename))
2008                 kfree(treename);
2009         if (!IS_ERR(name))
2010                 kfree(name);
2011
2012         switch (status.ret) {
2013         case KSMBD_TREE_CONN_STATUS_OK:
2014                 rsp->hdr.Status = STATUS_SUCCESS;
2015                 rc = 0;
2016                 break;
2017         case -ESTALE:
2018         case -ENOENT:
2019         case KSMBD_TREE_CONN_STATUS_NO_SHARE:
2020                 rsp->hdr.Status = STATUS_BAD_NETWORK_NAME;
2021                 break;
2022         case -ENOMEM:
2023         case KSMBD_TREE_CONN_STATUS_NOMEM:
2024                 rsp->hdr.Status = STATUS_NO_MEMORY;
2025                 break;
2026         case KSMBD_TREE_CONN_STATUS_ERROR:
2027         case KSMBD_TREE_CONN_STATUS_TOO_MANY_CONNS:
2028         case KSMBD_TREE_CONN_STATUS_TOO_MANY_SESSIONS:
2029                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
2030                 break;
2031         case -EINVAL:
2032                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
2033                 break;
2034         default:
2035                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
2036         }
2037
2038         if (status.ret != KSMBD_TREE_CONN_STATUS_OK)
2039                 smb2_set_err_rsp(work);
2040
2041         return rc;
2042 }
2043
2044 /**
2045  * smb2_create_open_flags() - convert smb open flags to unix open flags
2046  * @file_present:       is file already present
2047  * @access:             file access flags
2048  * @disposition:        file disposition flags
2049  * @may_flags:          set with MAY_ flags
2050  *
2051  * Return:      file open flags
2052  */
2053 static int smb2_create_open_flags(bool file_present, __le32 access,
2054                                   __le32 disposition,
2055                                   int *may_flags)
2056 {
2057         int oflags = O_NONBLOCK | O_LARGEFILE;
2058
2059         if (access & FILE_READ_DESIRED_ACCESS_LE &&
2060             access & FILE_WRITE_DESIRE_ACCESS_LE) {
2061                 oflags |= O_RDWR;
2062                 *may_flags = MAY_OPEN | MAY_READ | MAY_WRITE;
2063         } else if (access & FILE_WRITE_DESIRE_ACCESS_LE) {
2064                 oflags |= O_WRONLY;
2065                 *may_flags = MAY_OPEN | MAY_WRITE;
2066         } else {
2067                 oflags |= O_RDONLY;
2068                 *may_flags = MAY_OPEN | MAY_READ;
2069         }
2070
2071         if (access == FILE_READ_ATTRIBUTES_LE)
2072                 oflags |= O_PATH;
2073
2074         if (file_present) {
2075                 switch (disposition & FILE_CREATE_MASK_LE) {
2076                 case FILE_OPEN_LE:
2077                 case FILE_CREATE_LE:
2078                         break;
2079                 case FILE_SUPERSEDE_LE:
2080                 case FILE_OVERWRITE_LE:
2081                 case FILE_OVERWRITE_IF_LE:
2082                         oflags |= O_TRUNC;
2083                         break;
2084                 default:
2085                         break;
2086                 }
2087         } else {
2088                 switch (disposition & FILE_CREATE_MASK_LE) {
2089                 case FILE_SUPERSEDE_LE:
2090                 case FILE_CREATE_LE:
2091                 case FILE_OPEN_IF_LE:
2092                 case FILE_OVERWRITE_IF_LE:
2093                         oflags |= O_CREAT;
2094                         break;
2095                 case FILE_OPEN_LE:
2096                 case FILE_OVERWRITE_LE:
2097                         oflags &= ~O_CREAT;
2098                         break;
2099                 default:
2100                         break;
2101                 }
2102         }
2103
2104         return oflags;
2105 }
2106
2107 /**
2108  * smb2_tree_disconnect() - handler for smb tree connect request
2109  * @work:       smb work containing request buffer
2110  *
2111  * Return:      0
2112  */
2113 int smb2_tree_disconnect(struct ksmbd_work *work)
2114 {
2115         struct smb2_tree_disconnect_rsp *rsp;
2116         struct smb2_tree_disconnect_req *req;
2117         struct ksmbd_session *sess = work->sess;
2118         struct ksmbd_tree_connect *tcon = work->tcon;
2119         int err;
2120
2121         WORK_BUFFERS(work, req, rsp);
2122
2123         ksmbd_debug(SMB, "request\n");
2124
2125         rsp->StructureSize = cpu_to_le16(4);
2126         err = ksmbd_iov_pin_rsp(work, rsp,
2127                                 sizeof(struct smb2_tree_disconnect_rsp));
2128         if (err) {
2129                 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
2130                 smb2_set_err_rsp(work);
2131                 return err;
2132         }
2133
2134         if (!tcon || test_and_set_bit(TREE_CONN_EXPIRE, &tcon->status)) {
2135                 ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId);
2136
2137                 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2138                 smb2_set_err_rsp(work);
2139                 return -ENOENT;
2140         }
2141
2142         ksmbd_close_tree_conn_fds(work);
2143         ksmbd_tree_conn_disconnect(sess, tcon);
2144         work->tcon = NULL;
2145         return 0;
2146 }
2147
2148 /**
2149  * smb2_session_logoff() - handler for session log off request
2150  * @work:       smb work containing request buffer
2151  *
2152  * Return:      0
2153  */
2154 int smb2_session_logoff(struct ksmbd_work *work)
2155 {
2156         struct ksmbd_conn *conn = work->conn;
2157         struct smb2_logoff_req *req;
2158         struct smb2_logoff_rsp *rsp;
2159         struct ksmbd_session *sess;
2160         u64 sess_id;
2161         int err;
2162
2163         WORK_BUFFERS(work, req, rsp);
2164
2165         ksmbd_debug(SMB, "request\n");
2166
2167         sess_id = le64_to_cpu(req->hdr.SessionId);
2168
2169         rsp->StructureSize = cpu_to_le16(4);
2170         err = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_logoff_rsp));
2171         if (err) {
2172                 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
2173                 smb2_set_err_rsp(work);
2174                 return err;
2175         }
2176
2177         ksmbd_all_conn_set_status(sess_id, KSMBD_SESS_NEED_RECONNECT);
2178         ksmbd_close_session_fds(work);
2179         ksmbd_conn_wait_idle(conn, sess_id);
2180
2181         /*
2182          * Re-lookup session to validate if session is deleted
2183          * while waiting request complete
2184          */
2185         sess = ksmbd_session_lookup_all(conn, sess_id);
2186         if (ksmbd_tree_conn_session_logoff(sess)) {
2187                 ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId);
2188                 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2189                 smb2_set_err_rsp(work);
2190                 return -ENOENT;
2191         }
2192
2193         ksmbd_destroy_file_table(&sess->file_table);
2194         sess->state = SMB2_SESSION_EXPIRED;
2195
2196         ksmbd_free_user(sess->user);
2197         sess->user = NULL;
2198         ksmbd_all_conn_set_status(sess_id, KSMBD_SESS_NEED_NEGOTIATE);
2199         return 0;
2200 }
2201
2202 /**
2203  * create_smb2_pipe() - create IPC pipe
2204  * @work:       smb work containing request buffer
2205  *
2206  * Return:      0 on success, otherwise error
2207  */
2208 static noinline int create_smb2_pipe(struct ksmbd_work *work)
2209 {
2210         struct smb2_create_rsp *rsp;
2211         struct smb2_create_req *req;
2212         int id;
2213         int err;
2214         char *name;
2215
2216         WORK_BUFFERS(work, req, rsp);
2217
2218         name = smb_strndup_from_utf16(req->Buffer, le16_to_cpu(req->NameLength),
2219                                       1, work->conn->local_nls);
2220         if (IS_ERR(name)) {
2221                 rsp->hdr.Status = STATUS_NO_MEMORY;
2222                 err = PTR_ERR(name);
2223                 goto out;
2224         }
2225
2226         id = ksmbd_session_rpc_open(work->sess, name);
2227         if (id < 0) {
2228                 pr_err("Unable to open RPC pipe: %d\n", id);
2229                 err = id;
2230                 goto out;
2231         }
2232
2233         rsp->hdr.Status = STATUS_SUCCESS;
2234         rsp->StructureSize = cpu_to_le16(89);
2235         rsp->OplockLevel = SMB2_OPLOCK_LEVEL_NONE;
2236         rsp->Flags = 0;
2237         rsp->CreateAction = cpu_to_le32(FILE_OPENED);
2238
2239         rsp->CreationTime = cpu_to_le64(0);
2240         rsp->LastAccessTime = cpu_to_le64(0);
2241         rsp->ChangeTime = cpu_to_le64(0);
2242         rsp->AllocationSize = cpu_to_le64(0);
2243         rsp->EndofFile = cpu_to_le64(0);
2244         rsp->FileAttributes = FILE_ATTRIBUTE_NORMAL_LE;
2245         rsp->Reserved2 = 0;
2246         rsp->VolatileFileId = id;
2247         rsp->PersistentFileId = 0;
2248         rsp->CreateContextsOffset = 0;
2249         rsp->CreateContextsLength = 0;
2250
2251         err = ksmbd_iov_pin_rsp(work, rsp, offsetof(struct smb2_create_rsp, Buffer));
2252         if (err)
2253                 goto out;
2254
2255         kfree(name);
2256         return 0;
2257
2258 out:
2259         switch (err) {
2260         case -EINVAL:
2261                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
2262                 break;
2263         case -ENOSPC:
2264         case -ENOMEM:
2265                 rsp->hdr.Status = STATUS_NO_MEMORY;
2266                 break;
2267         }
2268
2269         if (!IS_ERR(name))
2270                 kfree(name);
2271
2272         smb2_set_err_rsp(work);
2273         return err;
2274 }
2275
2276 /**
2277  * smb2_set_ea() - handler for setting extended attributes using set
2278  *              info command
2279  * @eabuf:      set info command buffer
2280  * @buf_len:    set info command buffer length
2281  * @path:       dentry path for get ea
2282  *
2283  * Return:      0 on success, otherwise error
2284  */
2285 static int smb2_set_ea(struct smb2_ea_info *eabuf, unsigned int buf_len,
2286                        const struct path *path)
2287 {
2288         struct mnt_idmap *idmap = mnt_idmap(path->mnt);
2289         char *attr_name = NULL, *value;
2290         int rc = 0;
2291         unsigned int next = 0;
2292
2293         if (buf_len < sizeof(struct smb2_ea_info) + eabuf->EaNameLength +
2294                         le16_to_cpu(eabuf->EaValueLength))
2295                 return -EINVAL;
2296
2297         attr_name = kmalloc(XATTR_NAME_MAX + 1, GFP_KERNEL);
2298         if (!attr_name)
2299                 return -ENOMEM;
2300
2301         do {
2302                 if (!eabuf->EaNameLength)
2303                         goto next;
2304
2305                 ksmbd_debug(SMB,
2306                             "name : <%s>, name_len : %u, value_len : %u, next : %u\n",
2307                             eabuf->name, eabuf->EaNameLength,
2308                             le16_to_cpu(eabuf->EaValueLength),
2309                             le32_to_cpu(eabuf->NextEntryOffset));
2310
2311                 if (eabuf->EaNameLength >
2312                     (XATTR_NAME_MAX - XATTR_USER_PREFIX_LEN)) {
2313                         rc = -EINVAL;
2314                         break;
2315                 }
2316
2317                 memcpy(attr_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN);
2318                 memcpy(&attr_name[XATTR_USER_PREFIX_LEN], eabuf->name,
2319                        eabuf->EaNameLength);
2320                 attr_name[XATTR_USER_PREFIX_LEN + eabuf->EaNameLength] = '\0';
2321                 value = (char *)&eabuf->name + eabuf->EaNameLength + 1;
2322
2323                 if (!eabuf->EaValueLength) {
2324                         rc = ksmbd_vfs_casexattr_len(idmap,
2325                                                      path->dentry,
2326                                                      attr_name,
2327                                                      XATTR_USER_PREFIX_LEN +
2328                                                      eabuf->EaNameLength);
2329
2330                         /* delete the EA only when it exits */
2331                         if (rc > 0) {
2332                                 rc = ksmbd_vfs_remove_xattr(idmap,
2333                                                             path,
2334                                                             attr_name);
2335
2336                                 if (rc < 0) {
2337                                         ksmbd_debug(SMB,
2338                                                     "remove xattr failed(%d)\n",
2339                                                     rc);
2340                                         break;
2341                                 }
2342                         }
2343
2344                         /* if the EA doesn't exist, just do nothing. */
2345                         rc = 0;
2346                 } else {
2347                         rc = ksmbd_vfs_setxattr(idmap, path, attr_name, value,
2348                                                 le16_to_cpu(eabuf->EaValueLength), 0);
2349                         if (rc < 0) {
2350                                 ksmbd_debug(SMB,
2351                                             "ksmbd_vfs_setxattr is failed(%d)\n",
2352                                             rc);
2353                                 break;
2354                         }
2355                 }
2356
2357 next:
2358                 next = le32_to_cpu(eabuf->NextEntryOffset);
2359                 if (next == 0 || buf_len < next)
2360                         break;
2361                 buf_len -= next;
2362                 eabuf = (struct smb2_ea_info *)((char *)eabuf + next);
2363                 if (buf_len < sizeof(struct smb2_ea_info)) {
2364                         rc = -EINVAL;
2365                         break;
2366                 }
2367
2368                 if (buf_len < sizeof(struct smb2_ea_info) + eabuf->EaNameLength +
2369                                 le16_to_cpu(eabuf->EaValueLength)) {
2370                         rc = -EINVAL;
2371                         break;
2372                 }
2373         } while (next != 0);
2374
2375         kfree(attr_name);
2376         return rc;
2377 }
2378
2379 static noinline int smb2_set_stream_name_xattr(const struct path *path,
2380                                                struct ksmbd_file *fp,
2381                                                char *stream_name, int s_type)
2382 {
2383         struct mnt_idmap *idmap = mnt_idmap(path->mnt);
2384         size_t xattr_stream_size;
2385         char *xattr_stream_name;
2386         int rc;
2387
2388         rc = ksmbd_vfs_xattr_stream_name(stream_name,
2389                                          &xattr_stream_name,
2390                                          &xattr_stream_size,
2391                                          s_type);
2392         if (rc)
2393                 return rc;
2394
2395         fp->stream.name = xattr_stream_name;
2396         fp->stream.size = xattr_stream_size;
2397
2398         /* Check if there is stream prefix in xattr space */
2399         rc = ksmbd_vfs_casexattr_len(idmap,
2400                                      path->dentry,
2401                                      xattr_stream_name,
2402                                      xattr_stream_size);
2403         if (rc >= 0)
2404                 return 0;
2405
2406         if (fp->cdoption == FILE_OPEN_LE) {
2407                 ksmbd_debug(SMB, "XATTR stream name lookup failed: %d\n", rc);
2408                 return -EBADF;
2409         }
2410
2411         rc = ksmbd_vfs_setxattr(idmap, path, xattr_stream_name, NULL, 0, 0);
2412         if (rc < 0)
2413                 pr_err("Failed to store XATTR stream name :%d\n", rc);
2414         return 0;
2415 }
2416
2417 static int smb2_remove_smb_xattrs(const struct path *path)
2418 {
2419         struct mnt_idmap *idmap = mnt_idmap(path->mnt);
2420         char *name, *xattr_list = NULL;
2421         ssize_t xattr_list_len;
2422         int err = 0;
2423
2424         xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
2425         if (xattr_list_len < 0) {
2426                 goto out;
2427         } else if (!xattr_list_len) {
2428                 ksmbd_debug(SMB, "empty xattr in the file\n");
2429                 goto out;
2430         }
2431
2432         for (name = xattr_list; name - xattr_list < xattr_list_len;
2433                         name += strlen(name) + 1) {
2434                 ksmbd_debug(SMB, "%s, len %zd\n", name, strlen(name));
2435
2436                 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN) &&
2437                     !strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX,
2438                              STREAM_PREFIX_LEN)) {
2439                         err = ksmbd_vfs_remove_xattr(idmap, path,
2440                                                      name);
2441                         if (err)
2442                                 ksmbd_debug(SMB, "remove xattr failed : %s\n",
2443                                             name);
2444                 }
2445         }
2446 out:
2447         kvfree(xattr_list);
2448         return err;
2449 }
2450
2451 static int smb2_create_truncate(const struct path *path)
2452 {
2453         int rc = vfs_truncate(path, 0);
2454
2455         if (rc) {
2456                 pr_err("vfs_truncate failed, rc %d\n", rc);
2457                 return rc;
2458         }
2459
2460         rc = smb2_remove_smb_xattrs(path);
2461         if (rc == -EOPNOTSUPP)
2462                 rc = 0;
2463         if (rc)
2464                 ksmbd_debug(SMB,
2465                             "ksmbd_truncate_stream_name_xattr failed, rc %d\n",
2466                             rc);
2467         return rc;
2468 }
2469
2470 static void smb2_new_xattrs(struct ksmbd_tree_connect *tcon, const struct path *path,
2471                             struct ksmbd_file *fp)
2472 {
2473         struct xattr_dos_attrib da = {0};
2474         int rc;
2475
2476         if (!test_share_config_flag(tcon->share_conf,
2477                                     KSMBD_SHARE_FLAG_STORE_DOS_ATTRS))
2478                 return;
2479
2480         da.version = 4;
2481         da.attr = le32_to_cpu(fp->f_ci->m_fattr);
2482         da.itime = da.create_time = fp->create_time;
2483         da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME |
2484                 XATTR_DOSINFO_ITIME;
2485
2486         rc = ksmbd_vfs_set_dos_attrib_xattr(mnt_idmap(path->mnt), path, &da);
2487         if (rc)
2488                 ksmbd_debug(SMB, "failed to store file attribute into xattr\n");
2489 }
2490
2491 static void smb2_update_xattrs(struct ksmbd_tree_connect *tcon,
2492                                const struct path *path, struct ksmbd_file *fp)
2493 {
2494         struct xattr_dos_attrib da;
2495         int rc;
2496
2497         fp->f_ci->m_fattr &= ~(FILE_ATTRIBUTE_HIDDEN_LE | FILE_ATTRIBUTE_SYSTEM_LE);
2498
2499         /* get FileAttributes from XATTR_NAME_DOS_ATTRIBUTE */
2500         if (!test_share_config_flag(tcon->share_conf,
2501                                     KSMBD_SHARE_FLAG_STORE_DOS_ATTRS))
2502                 return;
2503
2504         rc = ksmbd_vfs_get_dos_attrib_xattr(mnt_idmap(path->mnt),
2505                                             path->dentry, &da);
2506         if (rc > 0) {
2507                 fp->f_ci->m_fattr = cpu_to_le32(da.attr);
2508                 fp->create_time = da.create_time;
2509                 fp->itime = da.itime;
2510         }
2511 }
2512
2513 static int smb2_creat(struct ksmbd_work *work, struct path *parent_path,
2514                       struct path *path, char *name, int open_flags,
2515                       umode_t posix_mode, bool is_dir)
2516 {
2517         struct ksmbd_tree_connect *tcon = work->tcon;
2518         struct ksmbd_share_config *share = tcon->share_conf;
2519         umode_t mode;
2520         int rc;
2521
2522         if (!(open_flags & O_CREAT))
2523                 return -EBADF;
2524
2525         ksmbd_debug(SMB, "file does not exist, so creating\n");
2526         if (is_dir == true) {
2527                 ksmbd_debug(SMB, "creating directory\n");
2528
2529                 mode = share_config_directory_mode(share, posix_mode);
2530                 rc = ksmbd_vfs_mkdir(work, name, mode);
2531                 if (rc)
2532                         return rc;
2533         } else {
2534                 ksmbd_debug(SMB, "creating regular file\n");
2535
2536                 mode = share_config_create_mode(share, posix_mode);
2537                 rc = ksmbd_vfs_create(work, name, mode);
2538                 if (rc)
2539                         return rc;
2540         }
2541
2542         rc = ksmbd_vfs_kern_path_locked(work, name, 0, parent_path, path, 0);
2543         if (rc) {
2544                 pr_err("cannot get linux path (%s), err = %d\n",
2545                        name, rc);
2546                 return rc;
2547         }
2548         return 0;
2549 }
2550
2551 static int smb2_create_sd_buffer(struct ksmbd_work *work,
2552                                  struct smb2_create_req *req,
2553                                  const struct path *path)
2554 {
2555         struct create_context *context;
2556         struct create_sd_buf_req *sd_buf;
2557
2558         if (!req->CreateContextsOffset)
2559                 return -ENOENT;
2560
2561         /* Parse SD BUFFER create contexts */
2562         context = smb2_find_context_vals(req, SMB2_CREATE_SD_BUFFER, 4);
2563         if (!context)
2564                 return -ENOENT;
2565         else if (IS_ERR(context))
2566                 return PTR_ERR(context);
2567
2568         ksmbd_debug(SMB,
2569                     "Set ACLs using SMB2_CREATE_SD_BUFFER context\n");
2570         sd_buf = (struct create_sd_buf_req *)context;
2571         if (le16_to_cpu(context->DataOffset) +
2572             le32_to_cpu(context->DataLength) <
2573             sizeof(struct create_sd_buf_req))
2574                 return -EINVAL;
2575         return set_info_sec(work->conn, work->tcon, path, &sd_buf->ntsd,
2576                             le32_to_cpu(sd_buf->ccontext.DataLength), true);
2577 }
2578
2579 static void ksmbd_acls_fattr(struct smb_fattr *fattr,
2580                              struct mnt_idmap *idmap,
2581                              struct inode *inode)
2582 {
2583         vfsuid_t vfsuid = i_uid_into_vfsuid(idmap, inode);
2584         vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode);
2585
2586         fattr->cf_uid = vfsuid_into_kuid(vfsuid);
2587         fattr->cf_gid = vfsgid_into_kgid(vfsgid);
2588         fattr->cf_mode = inode->i_mode;
2589         fattr->cf_acls = NULL;
2590         fattr->cf_dacls = NULL;
2591
2592         if (IS_ENABLED(CONFIG_FS_POSIX_ACL)) {
2593                 fattr->cf_acls = get_inode_acl(inode, ACL_TYPE_ACCESS);
2594                 if (S_ISDIR(inode->i_mode))
2595                         fattr->cf_dacls = get_inode_acl(inode, ACL_TYPE_DEFAULT);
2596         }
2597 }
2598
2599 /**
2600  * smb2_open() - handler for smb file open request
2601  * @work:       smb work containing request buffer
2602  *
2603  * Return:      0 on success, otherwise error
2604  */
2605 int smb2_open(struct ksmbd_work *work)
2606 {
2607         struct ksmbd_conn *conn = work->conn;
2608         struct ksmbd_session *sess = work->sess;
2609         struct ksmbd_tree_connect *tcon = work->tcon;
2610         struct smb2_create_req *req;
2611         struct smb2_create_rsp *rsp;
2612         struct path path, parent_path;
2613         struct ksmbd_share_config *share = tcon->share_conf;
2614         struct ksmbd_file *fp = NULL;
2615         struct file *filp = NULL;
2616         struct mnt_idmap *idmap = NULL;
2617         struct kstat stat;
2618         struct create_context *context;
2619         struct lease_ctx_info *lc = NULL;
2620         struct create_ea_buf_req *ea_buf = NULL;
2621         struct oplock_info *opinfo;
2622         __le32 *next_ptr = NULL;
2623         int req_op_level = 0, open_flags = 0, may_flags = 0, file_info = 0;
2624         int rc = 0;
2625         int contxt_cnt = 0, query_disk_id = 0;
2626         int maximal_access_ctxt = 0, posix_ctxt = 0;
2627         int s_type = 0;
2628         int next_off = 0;
2629         char *name = NULL;
2630         char *stream_name = NULL;
2631         bool file_present = false, created = false, already_permitted = false;
2632         int share_ret, need_truncate = 0;
2633         u64 time;
2634         umode_t posix_mode = 0;
2635         __le32 daccess, maximal_access = 0;
2636         int iov_len = 0;
2637
2638         WORK_BUFFERS(work, req, rsp);
2639
2640         if (req->hdr.NextCommand && !work->next_smb2_rcv_hdr_off &&
2641             (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)) {
2642                 ksmbd_debug(SMB, "invalid flag in chained command\n");
2643                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
2644                 smb2_set_err_rsp(work);
2645                 return -EINVAL;
2646         }
2647
2648         if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) {
2649                 ksmbd_debug(SMB, "IPC pipe create request\n");
2650                 return create_smb2_pipe(work);
2651         }
2652
2653         if (req->NameLength) {
2654                 if ((req->CreateOptions & FILE_DIRECTORY_FILE_LE) &&
2655                     *(char *)req->Buffer == '\\') {
2656                         pr_err("not allow directory name included leading slash\n");
2657                         rc = -EINVAL;
2658                         goto err_out1;
2659                 }
2660
2661                 name = smb2_get_name(req->Buffer,
2662                                      le16_to_cpu(req->NameLength),
2663                                      work->conn->local_nls);
2664                 if (IS_ERR(name)) {
2665                         rc = PTR_ERR(name);
2666                         if (rc != -ENOMEM)
2667                                 rc = -ENOENT;
2668                         name = NULL;
2669                         goto err_out1;
2670                 }
2671
2672                 ksmbd_debug(SMB, "converted name = %s\n", name);
2673                 if (strchr(name, ':')) {
2674                         if (!test_share_config_flag(work->tcon->share_conf,
2675                                                     KSMBD_SHARE_FLAG_STREAMS)) {
2676                                 rc = -EBADF;
2677                                 goto err_out1;
2678                         }
2679                         rc = parse_stream_name(name, &stream_name, &s_type);
2680                         if (rc < 0)
2681                                 goto err_out1;
2682                 }
2683
2684                 rc = ksmbd_validate_filename(name);
2685                 if (rc < 0)
2686                         goto err_out1;
2687
2688                 if (ksmbd_share_veto_filename(share, name)) {
2689                         rc = -ENOENT;
2690                         ksmbd_debug(SMB, "Reject open(), vetoed file: %s\n",
2691                                     name);
2692                         goto err_out1;
2693                 }
2694         } else {
2695                 name = kstrdup("", GFP_KERNEL);
2696                 if (!name) {
2697                         rc = -ENOMEM;
2698                         goto err_out1;
2699                 }
2700         }
2701
2702         req_op_level = req->RequestedOplockLevel;
2703         if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE)
2704                 lc = parse_lease_state(req);
2705
2706         if (le32_to_cpu(req->ImpersonationLevel) > le32_to_cpu(IL_DELEGATE)) {
2707                 pr_err("Invalid impersonationlevel : 0x%x\n",
2708                        le32_to_cpu(req->ImpersonationLevel));
2709                 rc = -EIO;
2710                 rsp->hdr.Status = STATUS_BAD_IMPERSONATION_LEVEL;
2711                 goto err_out1;
2712         }
2713
2714         if (req->CreateOptions && !(req->CreateOptions & CREATE_OPTIONS_MASK_LE)) {
2715                 pr_err("Invalid create options : 0x%x\n",
2716                        le32_to_cpu(req->CreateOptions));
2717                 rc = -EINVAL;
2718                 goto err_out1;
2719         } else {
2720                 if (req->CreateOptions & FILE_SEQUENTIAL_ONLY_LE &&
2721                     req->CreateOptions & FILE_RANDOM_ACCESS_LE)
2722                         req->CreateOptions = ~(FILE_SEQUENTIAL_ONLY_LE);
2723
2724                 if (req->CreateOptions &
2725                     (FILE_OPEN_BY_FILE_ID_LE | CREATE_TREE_CONNECTION |
2726                      FILE_RESERVE_OPFILTER_LE)) {
2727                         rc = -EOPNOTSUPP;
2728                         goto err_out1;
2729                 }
2730
2731                 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) {
2732                         if (req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE) {
2733                                 rc = -EINVAL;
2734                                 goto err_out1;
2735                         } else if (req->CreateOptions & FILE_NO_COMPRESSION_LE) {
2736                                 req->CreateOptions = ~(FILE_NO_COMPRESSION_LE);
2737                         }
2738                 }
2739         }
2740
2741         if (le32_to_cpu(req->CreateDisposition) >
2742             le32_to_cpu(FILE_OVERWRITE_IF_LE)) {
2743                 pr_err("Invalid create disposition : 0x%x\n",
2744                        le32_to_cpu(req->CreateDisposition));
2745                 rc = -EINVAL;
2746                 goto err_out1;
2747         }
2748
2749         if (!(req->DesiredAccess & DESIRED_ACCESS_MASK)) {
2750                 pr_err("Invalid desired access : 0x%x\n",
2751                        le32_to_cpu(req->DesiredAccess));
2752                 rc = -EACCES;
2753                 goto err_out1;
2754         }
2755
2756         if (req->FileAttributes && !(req->FileAttributes & FILE_ATTRIBUTE_MASK_LE)) {
2757                 pr_err("Invalid file attribute : 0x%x\n",
2758                        le32_to_cpu(req->FileAttributes));
2759                 rc = -EINVAL;
2760                 goto err_out1;
2761         }
2762
2763         if (req->CreateContextsOffset) {
2764                 /* Parse non-durable handle create contexts */
2765                 context = smb2_find_context_vals(req, SMB2_CREATE_EA_BUFFER, 4);
2766                 if (IS_ERR(context)) {
2767                         rc = PTR_ERR(context);
2768                         goto err_out1;
2769                 } else if (context) {
2770                         ea_buf = (struct create_ea_buf_req *)context;
2771                         if (le16_to_cpu(context->DataOffset) +
2772                             le32_to_cpu(context->DataLength) <
2773                             sizeof(struct create_ea_buf_req)) {
2774                                 rc = -EINVAL;
2775                                 goto err_out1;
2776                         }
2777                         if (req->CreateOptions & FILE_NO_EA_KNOWLEDGE_LE) {
2778                                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
2779                                 rc = -EACCES;
2780                                 goto err_out1;
2781                         }
2782                 }
2783
2784                 context = smb2_find_context_vals(req,
2785                                                  SMB2_CREATE_QUERY_MAXIMAL_ACCESS_REQUEST, 4);
2786                 if (IS_ERR(context)) {
2787                         rc = PTR_ERR(context);
2788                         goto err_out1;
2789                 } else if (context) {
2790                         ksmbd_debug(SMB,
2791                                     "get query maximal access context\n");
2792                         maximal_access_ctxt = 1;
2793                 }
2794
2795                 context = smb2_find_context_vals(req,
2796                                                  SMB2_CREATE_TIMEWARP_REQUEST, 4);
2797                 if (IS_ERR(context)) {
2798                         rc = PTR_ERR(context);
2799                         goto err_out1;
2800                 } else if (context) {
2801                         ksmbd_debug(SMB, "get timewarp context\n");
2802                         rc = -EBADF;
2803                         goto err_out1;
2804                 }
2805
2806                 if (tcon->posix_extensions) {
2807                         context = smb2_find_context_vals(req,
2808                                                          SMB2_CREATE_TAG_POSIX, 16);
2809                         if (IS_ERR(context)) {
2810                                 rc = PTR_ERR(context);
2811                                 goto err_out1;
2812                         } else if (context) {
2813                                 struct create_posix *posix =
2814                                         (struct create_posix *)context;
2815                                 if (le16_to_cpu(context->DataOffset) +
2816                                     le32_to_cpu(context->DataLength) <
2817                                     sizeof(struct create_posix) - 4) {
2818                                         rc = -EINVAL;
2819                                         goto err_out1;
2820                                 }
2821                                 ksmbd_debug(SMB, "get posix context\n");
2822
2823                                 posix_mode = le32_to_cpu(posix->Mode);
2824                                 posix_ctxt = 1;
2825                         }
2826                 }
2827         }
2828
2829         if (ksmbd_override_fsids(work)) {
2830                 rc = -ENOMEM;
2831                 goto err_out1;
2832         }
2833
2834         rc = ksmbd_vfs_kern_path_locked(work, name, LOOKUP_NO_SYMLINKS,
2835                                         &parent_path, &path, 1);
2836         if (!rc) {
2837                 file_present = true;
2838
2839                 if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE) {
2840                         /*
2841                          * If file exists with under flags, return access
2842                          * denied error.
2843                          */
2844                         if (req->CreateDisposition == FILE_OVERWRITE_IF_LE ||
2845                             req->CreateDisposition == FILE_OPEN_IF_LE) {
2846                                 rc = -EACCES;
2847                                 goto err_out;
2848                         }
2849
2850                         if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
2851                                 ksmbd_debug(SMB,
2852                                             "User does not have write permission\n");
2853                                 rc = -EACCES;
2854                                 goto err_out;
2855                         }
2856                 } else if (d_is_symlink(path.dentry)) {
2857                         rc = -EACCES;
2858                         goto err_out;
2859                 }
2860
2861                 file_present = true;
2862                 idmap = mnt_idmap(path.mnt);
2863         } else {
2864                 if (rc != -ENOENT)
2865                         goto err_out;
2866                 ksmbd_debug(SMB, "can not get linux path for %s, rc = %d\n",
2867                             name, rc);
2868                 rc = 0;
2869         }
2870
2871         if (stream_name) {
2872                 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) {
2873                         if (s_type == DATA_STREAM) {
2874                                 rc = -EIO;
2875                                 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
2876                         }
2877                 } else {
2878                         if (file_present && S_ISDIR(d_inode(path.dentry)->i_mode) &&
2879                             s_type == DATA_STREAM) {
2880                                 rc = -EIO;
2881                                 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
2882                         }
2883                 }
2884
2885                 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE &&
2886                     req->FileAttributes & FILE_ATTRIBUTE_NORMAL_LE) {
2887                         rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
2888                         rc = -EIO;
2889                 }
2890
2891                 if (rc < 0)
2892                         goto err_out;
2893         }
2894
2895         if (file_present && req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE &&
2896             S_ISDIR(d_inode(path.dentry)->i_mode) &&
2897             !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
2898                 ksmbd_debug(SMB, "open() argument is a directory: %s, %x\n",
2899                             name, req->CreateOptions);
2900                 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
2901                 rc = -EIO;
2902                 goto err_out;
2903         }
2904
2905         if (file_present && (req->CreateOptions & FILE_DIRECTORY_FILE_LE) &&
2906             !(req->CreateDisposition == FILE_CREATE_LE) &&
2907             !S_ISDIR(d_inode(path.dentry)->i_mode)) {
2908                 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
2909                 rc = -EIO;
2910                 goto err_out;
2911         }
2912
2913         if (!stream_name && file_present &&
2914             req->CreateDisposition == FILE_CREATE_LE) {
2915                 rc = -EEXIST;
2916                 goto err_out;
2917         }
2918
2919         daccess = smb_map_generic_desired_access(req->DesiredAccess);
2920
2921         if (file_present && !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
2922                 rc = smb_check_perm_dacl(conn, &path, &daccess,
2923                                          sess->user->uid);
2924                 if (rc)
2925                         goto err_out;
2926         }
2927
2928         if (daccess & FILE_MAXIMAL_ACCESS_LE) {
2929                 if (!file_present) {
2930                         daccess = cpu_to_le32(GENERIC_ALL_FLAGS);
2931                 } else {
2932                         ksmbd_vfs_query_maximal_access(idmap,
2933                                                             path.dentry,
2934                                                             &daccess);
2935                         already_permitted = true;
2936                 }
2937                 maximal_access = daccess;
2938         }
2939
2940         open_flags = smb2_create_open_flags(file_present, daccess,
2941                                             req->CreateDisposition,
2942                                             &may_flags);
2943
2944         if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
2945                 if (open_flags & O_CREAT) {
2946                         ksmbd_debug(SMB,
2947                                     "User does not have write permission\n");
2948                         rc = -EACCES;
2949                         goto err_out;
2950                 }
2951         }
2952
2953         /*create file if not present */
2954         if (!file_present) {
2955                 rc = smb2_creat(work, &parent_path, &path, name, open_flags,
2956                                 posix_mode,
2957                                 req->CreateOptions & FILE_DIRECTORY_FILE_LE);
2958                 if (rc) {
2959                         if (rc == -ENOENT) {
2960                                 rc = -EIO;
2961                                 rsp->hdr.Status = STATUS_OBJECT_PATH_NOT_FOUND;
2962                         }
2963                         goto err_out;
2964                 }
2965
2966                 created = true;
2967                 idmap = mnt_idmap(path.mnt);
2968                 if (ea_buf) {
2969                         if (le32_to_cpu(ea_buf->ccontext.DataLength) <
2970                             sizeof(struct smb2_ea_info)) {
2971                                 rc = -EINVAL;
2972                                 goto err_out;
2973                         }
2974
2975                         rc = smb2_set_ea(&ea_buf->ea,
2976                                          le32_to_cpu(ea_buf->ccontext.DataLength),
2977                                          &path);
2978                         if (rc == -EOPNOTSUPP)
2979                                 rc = 0;
2980                         else if (rc)
2981                                 goto err_out;
2982                 }
2983         } else if (!already_permitted) {
2984                 /* FILE_READ_ATTRIBUTE is allowed without inode_permission,
2985                  * because execute(search) permission on a parent directory,
2986                  * is already granted.
2987                  */
2988                 if (daccess & ~(FILE_READ_ATTRIBUTES_LE | FILE_READ_CONTROL_LE)) {
2989                         rc = inode_permission(idmap,
2990                                               d_inode(path.dentry),
2991                                               may_flags);
2992                         if (rc)
2993                                 goto err_out;
2994
2995                         if ((daccess & FILE_DELETE_LE) ||
2996                             (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
2997                                 rc = inode_permission(idmap,
2998                                                       d_inode(path.dentry->d_parent),
2999                                                       MAY_EXEC | MAY_WRITE);
3000                                 if (rc)
3001                                         goto err_out;
3002                         }
3003                 }
3004         }
3005
3006         rc = ksmbd_query_inode_status(d_inode(path.dentry->d_parent));
3007         if (rc == KSMBD_INODE_STATUS_PENDING_DELETE) {
3008                 rc = -EBUSY;
3009                 goto err_out;
3010         }
3011
3012         rc = 0;
3013         filp = dentry_open(&path, open_flags, current_cred());
3014         if (IS_ERR(filp)) {
3015                 rc = PTR_ERR(filp);
3016                 pr_err("dentry open for dir failed, rc %d\n", rc);
3017                 goto err_out;
3018         }
3019
3020         if (file_present) {
3021                 if (!(open_flags & O_TRUNC))
3022                         file_info = FILE_OPENED;
3023                 else
3024                         file_info = FILE_OVERWRITTEN;
3025
3026                 if ((req->CreateDisposition & FILE_CREATE_MASK_LE) ==
3027                     FILE_SUPERSEDE_LE)
3028                         file_info = FILE_SUPERSEDED;
3029         } else if (open_flags & O_CREAT) {
3030                 file_info = FILE_CREATED;
3031         }
3032
3033         ksmbd_vfs_set_fadvise(filp, req->CreateOptions);
3034
3035         /* Obtain Volatile-ID */
3036         fp = ksmbd_open_fd(work, filp);
3037         if (IS_ERR(fp)) {
3038                 fput(filp);
3039                 rc = PTR_ERR(fp);
3040                 fp = NULL;
3041                 goto err_out;
3042         }
3043
3044         /* Get Persistent-ID */
3045         ksmbd_open_durable_fd(fp);
3046         if (!has_file_id(fp->persistent_id)) {
3047                 rc = -ENOMEM;
3048                 goto err_out;
3049         }
3050
3051         fp->cdoption = req->CreateDisposition;
3052         fp->daccess = daccess;
3053         fp->saccess = req->ShareAccess;
3054         fp->coption = req->CreateOptions;
3055
3056         /* Set default windows and posix acls if creating new file */
3057         if (created) {
3058                 int posix_acl_rc;
3059                 struct inode *inode = d_inode(path.dentry);
3060
3061                 posix_acl_rc = ksmbd_vfs_inherit_posix_acl(idmap,
3062                                                            &path,
3063                                                            d_inode(path.dentry->d_parent));
3064                 if (posix_acl_rc)
3065                         ksmbd_debug(SMB, "inherit posix acl failed : %d\n", posix_acl_rc);
3066
3067                 if (test_share_config_flag(work->tcon->share_conf,
3068                                            KSMBD_SHARE_FLAG_ACL_XATTR)) {
3069                         rc = smb_inherit_dacl(conn, &path, sess->user->uid,
3070                                               sess->user->gid);
3071                 }
3072
3073                 if (rc) {
3074                         rc = smb2_create_sd_buffer(work, req, &path);
3075                         if (rc) {
3076                                 if (posix_acl_rc)
3077                                         ksmbd_vfs_set_init_posix_acl(idmap,
3078                                                                      &path);
3079
3080                                 if (test_share_config_flag(work->tcon->share_conf,
3081                                                            KSMBD_SHARE_FLAG_ACL_XATTR)) {
3082                                         struct smb_fattr fattr;
3083                                         struct smb_ntsd *pntsd;
3084                                         int pntsd_size, ace_num = 0;
3085
3086                                         ksmbd_acls_fattr(&fattr, idmap, inode);
3087                                         if (fattr.cf_acls)
3088                                                 ace_num = fattr.cf_acls->a_count;
3089                                         if (fattr.cf_dacls)
3090                                                 ace_num += fattr.cf_dacls->a_count;
3091
3092                                         pntsd = kmalloc(sizeof(struct smb_ntsd) +
3093                                                         sizeof(struct smb_sid) * 3 +
3094                                                         sizeof(struct smb_acl) +
3095                                                         sizeof(struct smb_ace) * ace_num * 2,
3096                                                         GFP_KERNEL);
3097                                         if (!pntsd) {
3098                                                 posix_acl_release(fattr.cf_acls);
3099                                                 posix_acl_release(fattr.cf_dacls);
3100                                                 goto err_out;
3101                                         }
3102
3103                                         rc = build_sec_desc(idmap,
3104                                                             pntsd, NULL, 0,
3105                                                             OWNER_SECINFO |
3106                                                             GROUP_SECINFO |
3107                                                             DACL_SECINFO,
3108                                                             &pntsd_size, &fattr);
3109                                         posix_acl_release(fattr.cf_acls);
3110                                         posix_acl_release(fattr.cf_dacls);
3111                                         if (rc) {
3112                                                 kfree(pntsd);
3113                                                 goto err_out;
3114                                         }
3115
3116                                         rc = ksmbd_vfs_set_sd_xattr(conn,
3117                                                                     idmap,
3118                                                                     &path,
3119                                                                     pntsd,
3120                                                                     pntsd_size);
3121                                         kfree(pntsd);
3122                                         if (rc)
3123                                                 pr_err("failed to store ntacl in xattr : %d\n",
3124                                                        rc);
3125                                 }
3126                         }
3127                 }
3128                 rc = 0;
3129         }
3130
3131         if (stream_name) {
3132                 rc = smb2_set_stream_name_xattr(&path,
3133                                                 fp,
3134                                                 stream_name,
3135                                                 s_type);
3136                 if (rc)
3137                         goto err_out;
3138                 file_info = FILE_CREATED;
3139         }
3140
3141         fp->attrib_only = !(req->DesiredAccess & ~(FILE_READ_ATTRIBUTES_LE |
3142                         FILE_WRITE_ATTRIBUTES_LE | FILE_SYNCHRONIZE_LE));
3143         if (!S_ISDIR(file_inode(filp)->i_mode) && open_flags & O_TRUNC &&
3144             !fp->attrib_only && !stream_name) {
3145                 smb_break_all_oplock(work, fp);
3146                 need_truncate = 1;
3147         }
3148
3149         /* fp should be searchable through ksmbd_inode.m_fp_list
3150          * after daccess, saccess, attrib_only, and stream are
3151          * initialized.
3152          */
3153         write_lock(&fp->f_ci->m_lock);
3154         list_add(&fp->node, &fp->f_ci->m_fp_list);
3155         write_unlock(&fp->f_ci->m_lock);
3156
3157         /* Check delete pending among previous fp before oplock break */
3158         if (ksmbd_inode_pending_delete(fp)) {
3159                 rc = -EBUSY;
3160                 goto err_out;
3161         }
3162
3163         share_ret = ksmbd_smb_check_shared_mode(fp->filp, fp);
3164         if (!test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_OPLOCKS) ||
3165             (req_op_level == SMB2_OPLOCK_LEVEL_LEASE &&
3166              !(conn->vals->capabilities & SMB2_GLOBAL_CAP_LEASING))) {
3167                 if (share_ret < 0 && !S_ISDIR(file_inode(fp->filp)->i_mode)) {
3168                         rc = share_ret;
3169                         goto err_out;
3170                 }
3171         } else {
3172                 if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE) {
3173                         req_op_level = smb2_map_lease_to_oplock(lc->req_state);
3174                         ksmbd_debug(SMB,
3175                                     "lease req for(%s) req oplock state 0x%x, lease state 0x%x\n",
3176                                     name, req_op_level, lc->req_state);
3177                         rc = find_same_lease_key(sess, fp->f_ci, lc);
3178                         if (rc)
3179                                 goto err_out;
3180                 } else if (open_flags == O_RDONLY &&
3181                            (req_op_level == SMB2_OPLOCK_LEVEL_BATCH ||
3182                             req_op_level == SMB2_OPLOCK_LEVEL_EXCLUSIVE))
3183                         req_op_level = SMB2_OPLOCK_LEVEL_II;
3184
3185                 rc = smb_grant_oplock(work, req_op_level,
3186                                       fp->persistent_id, fp,
3187                                       le32_to_cpu(req->hdr.Id.SyncId.TreeId),
3188                                       lc, share_ret);
3189                 if (rc < 0)
3190                         goto err_out;
3191         }
3192
3193         if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)
3194                 ksmbd_fd_set_delete_on_close(fp, file_info);
3195
3196         if (need_truncate) {
3197                 rc = smb2_create_truncate(&path);
3198                 if (rc)
3199                         goto err_out;
3200         }
3201
3202         if (req->CreateContextsOffset) {
3203                 struct create_alloc_size_req *az_req;
3204
3205                 az_req = (struct create_alloc_size_req *)smb2_find_context_vals(req,
3206                                         SMB2_CREATE_ALLOCATION_SIZE, 4);
3207                 if (IS_ERR(az_req)) {
3208                         rc = PTR_ERR(az_req);
3209                         goto err_out;
3210                 } else if (az_req) {
3211                         loff_t alloc_size;
3212                         int err;
3213
3214                         if (le16_to_cpu(az_req->ccontext.DataOffset) +
3215                             le32_to_cpu(az_req->ccontext.DataLength) <
3216                             sizeof(struct create_alloc_size_req)) {
3217                                 rc = -EINVAL;
3218                                 goto err_out;
3219                         }
3220                         alloc_size = le64_to_cpu(az_req->AllocationSize);
3221                         ksmbd_debug(SMB,
3222                                     "request smb2 create allocate size : %llu\n",
3223                                     alloc_size);
3224                         smb_break_all_levII_oplock(work, fp, 1);
3225                         err = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0,
3226                                             alloc_size);
3227                         if (err < 0)
3228                                 ksmbd_debug(SMB,
3229                                             "vfs_fallocate is failed : %d\n",
3230                                             err);
3231                 }
3232
3233                 context = smb2_find_context_vals(req, SMB2_CREATE_QUERY_ON_DISK_ID, 4);
3234                 if (IS_ERR(context)) {
3235                         rc = PTR_ERR(context);
3236                         goto err_out;
3237                 } else if (context) {
3238                         ksmbd_debug(SMB, "get query on disk id context\n");
3239                         query_disk_id = 1;
3240                 }
3241         }
3242
3243         rc = ksmbd_vfs_getattr(&path, &stat);
3244         if (rc)
3245                 goto err_out;
3246
3247         if (stat.result_mask & STATX_BTIME)
3248                 fp->create_time = ksmbd_UnixTimeToNT(stat.btime);
3249         else
3250                 fp->create_time = ksmbd_UnixTimeToNT(stat.ctime);
3251         if (req->FileAttributes || fp->f_ci->m_fattr == 0)
3252                 fp->f_ci->m_fattr =
3253                         cpu_to_le32(smb2_get_dos_mode(&stat, le32_to_cpu(req->FileAttributes)));
3254
3255         if (!created)
3256                 smb2_update_xattrs(tcon, &path, fp);
3257         else
3258                 smb2_new_xattrs(tcon, &path, fp);
3259
3260         memcpy(fp->client_guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE);
3261
3262         rsp->StructureSize = cpu_to_le16(89);
3263         rcu_read_lock();
3264         opinfo = rcu_dereference(fp->f_opinfo);
3265         rsp->OplockLevel = opinfo != NULL ? opinfo->level : 0;
3266         rcu_read_unlock();
3267         rsp->Flags = 0;
3268         rsp->CreateAction = cpu_to_le32(file_info);
3269         rsp->CreationTime = cpu_to_le64(fp->create_time);
3270         time = ksmbd_UnixTimeToNT(stat.atime);
3271         rsp->LastAccessTime = cpu_to_le64(time);
3272         time = ksmbd_UnixTimeToNT(stat.mtime);
3273         rsp->LastWriteTime = cpu_to_le64(time);
3274         time = ksmbd_UnixTimeToNT(stat.ctime);
3275         rsp->ChangeTime = cpu_to_le64(time);
3276         rsp->AllocationSize = S_ISDIR(stat.mode) ? 0 :
3277                 cpu_to_le64(stat.blocks << 9);
3278         rsp->EndofFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
3279         rsp->FileAttributes = fp->f_ci->m_fattr;
3280
3281         rsp->Reserved2 = 0;
3282
3283         rsp->PersistentFileId = fp->persistent_id;
3284         rsp->VolatileFileId = fp->volatile_id;
3285
3286         rsp->CreateContextsOffset = 0;
3287         rsp->CreateContextsLength = 0;
3288         iov_len = offsetof(struct smb2_create_rsp, Buffer);
3289
3290         /* If lease is request send lease context response */
3291         if (opinfo && opinfo->is_lease) {
3292                 struct create_context *lease_ccontext;
3293
3294                 ksmbd_debug(SMB, "lease granted on(%s) lease state 0x%x\n",
3295                             name, opinfo->o_lease->state);
3296                 rsp->OplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
3297
3298                 lease_ccontext = (struct create_context *)rsp->Buffer;
3299                 contxt_cnt++;
3300                 create_lease_buf(rsp->Buffer, opinfo->o_lease);
3301                 le32_add_cpu(&rsp->CreateContextsLength,
3302                              conn->vals->create_lease_size);
3303                 iov_len += conn->vals->create_lease_size;
3304                 next_ptr = &lease_ccontext->Next;
3305                 next_off = conn->vals->create_lease_size;
3306         }
3307
3308         if (maximal_access_ctxt) {
3309                 struct create_context *mxac_ccontext;
3310
3311                 if (maximal_access == 0)
3312                         ksmbd_vfs_query_maximal_access(idmap,
3313                                                        path.dentry,
3314                                                        &maximal_access);
3315                 mxac_ccontext = (struct create_context *)(rsp->Buffer +
3316                                 le32_to_cpu(rsp->CreateContextsLength));
3317                 contxt_cnt++;
3318                 create_mxac_rsp_buf(rsp->Buffer +
3319                                 le32_to_cpu(rsp->CreateContextsLength),
3320                                 le32_to_cpu(maximal_access));
3321                 le32_add_cpu(&rsp->CreateContextsLength,
3322                              conn->vals->create_mxac_size);
3323                 iov_len += conn->vals->create_mxac_size;
3324                 if (next_ptr)
3325                         *next_ptr = cpu_to_le32(next_off);
3326                 next_ptr = &mxac_ccontext->Next;
3327                 next_off = conn->vals->create_mxac_size;
3328         }
3329
3330         if (query_disk_id) {
3331                 struct create_context *disk_id_ccontext;
3332
3333                 disk_id_ccontext = (struct create_context *)(rsp->Buffer +
3334                                 le32_to_cpu(rsp->CreateContextsLength));
3335                 contxt_cnt++;
3336                 create_disk_id_rsp_buf(rsp->Buffer +
3337                                 le32_to_cpu(rsp->CreateContextsLength),
3338                                 stat.ino, tcon->id);
3339                 le32_add_cpu(&rsp->CreateContextsLength,
3340                              conn->vals->create_disk_id_size);
3341                 iov_len += conn->vals->create_disk_id_size;
3342                 if (next_ptr)
3343                         *next_ptr = cpu_to_le32(next_off);
3344                 next_ptr = &disk_id_ccontext->Next;
3345                 next_off = conn->vals->create_disk_id_size;
3346         }
3347
3348         if (posix_ctxt) {
3349                 contxt_cnt++;
3350                 create_posix_rsp_buf(rsp->Buffer +
3351                                 le32_to_cpu(rsp->CreateContextsLength),
3352                                 fp);
3353                 le32_add_cpu(&rsp->CreateContextsLength,
3354                              conn->vals->create_posix_size);
3355                 iov_len += conn->vals->create_posix_size;
3356                 if (next_ptr)
3357                         *next_ptr = cpu_to_le32(next_off);
3358         }
3359
3360         if (contxt_cnt > 0) {
3361                 rsp->CreateContextsOffset =
3362                         cpu_to_le32(offsetof(struct smb2_create_rsp, Buffer));
3363         }
3364
3365 err_out:
3366         if (file_present || created) {
3367                 inode_unlock(d_inode(parent_path.dentry));
3368                 path_put(&path);
3369                 path_put(&parent_path);
3370         }
3371         ksmbd_revert_fsids(work);
3372 err_out1:
3373         if (!rc)
3374                 rc = ksmbd_iov_pin_rsp(work, (void *)rsp, iov_len);
3375         if (rc) {
3376                 if (rc == -EINVAL)
3377                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
3378                 else if (rc == -EOPNOTSUPP)
3379                         rsp->hdr.Status = STATUS_NOT_SUPPORTED;
3380                 else if (rc == -EACCES || rc == -ESTALE || rc == -EXDEV)
3381                         rsp->hdr.Status = STATUS_ACCESS_DENIED;
3382                 else if (rc == -ENOENT)
3383                         rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID;
3384                 else if (rc == -EPERM)
3385                         rsp->hdr.Status = STATUS_SHARING_VIOLATION;
3386                 else if (rc == -EBUSY)
3387                         rsp->hdr.Status = STATUS_DELETE_PENDING;
3388                 else if (rc == -EBADF)
3389                         rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
3390                 else if (rc == -ENOEXEC)
3391                         rsp->hdr.Status = STATUS_DUPLICATE_OBJECTID;
3392                 else if (rc == -ENXIO)
3393                         rsp->hdr.Status = STATUS_NO_SUCH_DEVICE;
3394                 else if (rc == -EEXIST)
3395                         rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION;
3396                 else if (rc == -EMFILE)
3397                         rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
3398                 if (!rsp->hdr.Status)
3399                         rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
3400
3401                 if (fp)
3402                         ksmbd_fd_put(work, fp);
3403                 smb2_set_err_rsp(work);
3404                 ksmbd_debug(SMB, "Error response: %x\n", rsp->hdr.Status);
3405         }
3406
3407         kfree(name);
3408         kfree(lc);
3409
3410         return 0;
3411 }
3412
3413 static int readdir_info_level_struct_sz(int info_level)
3414 {
3415         switch (info_level) {
3416         case FILE_FULL_DIRECTORY_INFORMATION:
3417                 return sizeof(struct file_full_directory_info);
3418         case FILE_BOTH_DIRECTORY_INFORMATION:
3419                 return sizeof(struct file_both_directory_info);
3420         case FILE_DIRECTORY_INFORMATION:
3421                 return sizeof(struct file_directory_info);
3422         case FILE_NAMES_INFORMATION:
3423                 return sizeof(struct file_names_info);
3424         case FILEID_FULL_DIRECTORY_INFORMATION:
3425                 return sizeof(struct file_id_full_dir_info);
3426         case FILEID_BOTH_DIRECTORY_INFORMATION:
3427                 return sizeof(struct file_id_both_directory_info);
3428         case SMB_FIND_FILE_POSIX_INFO:
3429                 return sizeof(struct smb2_posix_info);
3430         default:
3431                 return -EOPNOTSUPP;
3432         }
3433 }
3434
3435 static int dentry_name(struct ksmbd_dir_info *d_info, int info_level)
3436 {
3437         switch (info_level) {
3438         case FILE_FULL_DIRECTORY_INFORMATION:
3439         {
3440                 struct file_full_directory_info *ffdinfo;
3441
3442                 ffdinfo = (struct file_full_directory_info *)d_info->rptr;
3443                 d_info->rptr += le32_to_cpu(ffdinfo->NextEntryOffset);
3444                 d_info->name = ffdinfo->FileName;
3445                 d_info->name_len = le32_to_cpu(ffdinfo->FileNameLength);
3446                 return 0;
3447         }
3448         case FILE_BOTH_DIRECTORY_INFORMATION:
3449         {
3450                 struct file_both_directory_info *fbdinfo;
3451
3452                 fbdinfo = (struct file_both_directory_info *)d_info->rptr;
3453                 d_info->rptr += le32_to_cpu(fbdinfo->NextEntryOffset);
3454                 d_info->name = fbdinfo->FileName;
3455                 d_info->name_len = le32_to_cpu(fbdinfo->FileNameLength);
3456                 return 0;
3457         }
3458         case FILE_DIRECTORY_INFORMATION:
3459         {
3460                 struct file_directory_info *fdinfo;
3461
3462                 fdinfo = (struct file_directory_info *)d_info->rptr;
3463                 d_info->rptr += le32_to_cpu(fdinfo->NextEntryOffset);
3464                 d_info->name = fdinfo->FileName;
3465                 d_info->name_len = le32_to_cpu(fdinfo->FileNameLength);
3466                 return 0;
3467         }
3468         case FILE_NAMES_INFORMATION:
3469         {
3470                 struct file_names_info *fninfo;
3471
3472                 fninfo = (struct file_names_info *)d_info->rptr;
3473                 d_info->rptr += le32_to_cpu(fninfo->NextEntryOffset);
3474                 d_info->name = fninfo->FileName;
3475                 d_info->name_len = le32_to_cpu(fninfo->FileNameLength);
3476                 return 0;
3477         }
3478         case FILEID_FULL_DIRECTORY_INFORMATION:
3479         {
3480                 struct file_id_full_dir_info *dinfo;
3481
3482                 dinfo = (struct file_id_full_dir_info *)d_info->rptr;
3483                 d_info->rptr += le32_to_cpu(dinfo->NextEntryOffset);
3484                 d_info->name = dinfo->FileName;
3485                 d_info->name_len = le32_to_cpu(dinfo->FileNameLength);
3486                 return 0;
3487         }
3488         case FILEID_BOTH_DIRECTORY_INFORMATION:
3489         {
3490                 struct file_id_both_directory_info *fibdinfo;
3491
3492                 fibdinfo = (struct file_id_both_directory_info *)d_info->rptr;
3493                 d_info->rptr += le32_to_cpu(fibdinfo->NextEntryOffset);
3494                 d_info->name = fibdinfo->FileName;
3495                 d_info->name_len = le32_to_cpu(fibdinfo->FileNameLength);
3496                 return 0;
3497         }
3498         case SMB_FIND_FILE_POSIX_INFO:
3499         {
3500                 struct smb2_posix_info *posix_info;
3501
3502                 posix_info = (struct smb2_posix_info *)d_info->rptr;
3503                 d_info->rptr += le32_to_cpu(posix_info->NextEntryOffset);
3504                 d_info->name = posix_info->name;
3505                 d_info->name_len = le32_to_cpu(posix_info->name_len);
3506                 return 0;
3507         }
3508         default:
3509                 return -EINVAL;
3510         }
3511 }
3512
3513 /**
3514  * smb2_populate_readdir_entry() - encode directory entry in smb2 response
3515  * buffer
3516  * @conn:       connection instance
3517  * @info_level: smb information level
3518  * @d_info:     structure included variables for query dir
3519  * @ksmbd_kstat:        ksmbd wrapper of dirent stat information
3520  *
3521  * if directory has many entries, find first can't read it fully.
3522  * find next might be called multiple times to read remaining dir entries
3523  *
3524  * Return:      0 on success, otherwise error
3525  */
3526 static int smb2_populate_readdir_entry(struct ksmbd_conn *conn, int info_level,
3527                                        struct ksmbd_dir_info *d_info,
3528                                        struct ksmbd_kstat *ksmbd_kstat)
3529 {
3530         int next_entry_offset = 0;
3531         char *conv_name;
3532         int conv_len;
3533         void *kstat;
3534         int struct_sz, rc = 0;
3535
3536         conv_name = ksmbd_convert_dir_info_name(d_info,
3537                                                 conn->local_nls,
3538                                                 &conv_len);
3539         if (!conv_name)
3540                 return -ENOMEM;
3541
3542         /* Somehow the name has only terminating NULL bytes */
3543         if (conv_len < 0) {
3544                 rc = -EINVAL;
3545                 goto free_conv_name;
3546         }
3547
3548         struct_sz = readdir_info_level_struct_sz(info_level) + conv_len;
3549         next_entry_offset = ALIGN(struct_sz, KSMBD_DIR_INFO_ALIGNMENT);
3550         d_info->last_entry_off_align = next_entry_offset - struct_sz;
3551
3552         if (next_entry_offset > d_info->out_buf_len) {
3553                 d_info->out_buf_len = 0;
3554                 rc = -ENOSPC;
3555                 goto free_conv_name;
3556         }
3557
3558         kstat = d_info->wptr;
3559         if (info_level != FILE_NAMES_INFORMATION)
3560                 kstat = ksmbd_vfs_init_kstat(&d_info->wptr, ksmbd_kstat);
3561
3562         switch (info_level) {
3563         case FILE_FULL_DIRECTORY_INFORMATION:
3564         {
3565                 struct file_full_directory_info *ffdinfo;
3566
3567                 ffdinfo = (struct file_full_directory_info *)kstat;
3568                 ffdinfo->FileNameLength = cpu_to_le32(conv_len);
3569                 ffdinfo->EaSize =
3570                         smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3571                 if (ffdinfo->EaSize)
3572                         ffdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3573                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3574                         ffdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3575                 memcpy(ffdinfo->FileName, conv_name, conv_len);
3576                 ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3577                 break;
3578         }
3579         case FILE_BOTH_DIRECTORY_INFORMATION:
3580         {
3581                 struct file_both_directory_info *fbdinfo;
3582
3583                 fbdinfo = (struct file_both_directory_info *)kstat;
3584                 fbdinfo->FileNameLength = cpu_to_le32(conv_len);
3585                 fbdinfo->EaSize =
3586                         smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3587                 if (fbdinfo->EaSize)
3588                         fbdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3589                 fbdinfo->ShortNameLength = 0;
3590                 fbdinfo->Reserved = 0;
3591                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3592                         fbdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3593                 memcpy(fbdinfo->FileName, conv_name, conv_len);
3594                 fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3595                 break;
3596         }
3597         case FILE_DIRECTORY_INFORMATION:
3598         {
3599                 struct file_directory_info *fdinfo;
3600
3601                 fdinfo = (struct file_directory_info *)kstat;
3602                 fdinfo->FileNameLength = cpu_to_le32(conv_len);
3603                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3604                         fdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3605                 memcpy(fdinfo->FileName, conv_name, conv_len);
3606                 fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3607                 break;
3608         }
3609         case FILE_NAMES_INFORMATION:
3610         {
3611                 struct file_names_info *fninfo;
3612
3613                 fninfo = (struct file_names_info *)kstat;
3614                 fninfo->FileNameLength = cpu_to_le32(conv_len);
3615                 memcpy(fninfo->FileName, conv_name, conv_len);
3616                 fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3617                 break;
3618         }
3619         case FILEID_FULL_DIRECTORY_INFORMATION:
3620         {
3621                 struct file_id_full_dir_info *dinfo;
3622
3623                 dinfo = (struct file_id_full_dir_info *)kstat;
3624                 dinfo->FileNameLength = cpu_to_le32(conv_len);
3625                 dinfo->EaSize =
3626                         smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3627                 if (dinfo->EaSize)
3628                         dinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3629                 dinfo->Reserved = 0;
3630                 dinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino);
3631                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3632                         dinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3633                 memcpy(dinfo->FileName, conv_name, conv_len);
3634                 dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3635                 break;
3636         }
3637         case FILEID_BOTH_DIRECTORY_INFORMATION:
3638         {
3639                 struct file_id_both_directory_info *fibdinfo;
3640
3641                 fibdinfo = (struct file_id_both_directory_info *)kstat;
3642                 fibdinfo->FileNameLength = cpu_to_le32(conv_len);
3643                 fibdinfo->EaSize =
3644                         smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3645                 if (fibdinfo->EaSize)
3646                         fibdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3647                 fibdinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino);
3648                 fibdinfo->ShortNameLength = 0;
3649                 fibdinfo->Reserved = 0;
3650                 fibdinfo->Reserved2 = cpu_to_le16(0);
3651                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3652                         fibdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3653                 memcpy(fibdinfo->FileName, conv_name, conv_len);
3654                 fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3655                 break;
3656         }
3657         case SMB_FIND_FILE_POSIX_INFO:
3658         {
3659                 struct smb2_posix_info *posix_info;
3660                 u64 time;
3661
3662                 posix_info = (struct smb2_posix_info *)kstat;
3663                 posix_info->Ignored = 0;
3664                 posix_info->CreationTime = cpu_to_le64(ksmbd_kstat->create_time);
3665                 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->ctime);
3666                 posix_info->ChangeTime = cpu_to_le64(time);
3667                 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->atime);
3668                 posix_info->LastAccessTime = cpu_to_le64(time);
3669                 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->mtime);
3670                 posix_info->LastWriteTime = cpu_to_le64(time);
3671                 posix_info->EndOfFile = cpu_to_le64(ksmbd_kstat->kstat->size);
3672                 posix_info->AllocationSize = cpu_to_le64(ksmbd_kstat->kstat->blocks << 9);
3673                 posix_info->DeviceId = cpu_to_le32(ksmbd_kstat->kstat->rdev);
3674                 posix_info->HardLinks = cpu_to_le32(ksmbd_kstat->kstat->nlink);
3675                 posix_info->Mode = cpu_to_le32(ksmbd_kstat->kstat->mode & 0777);
3676                 posix_info->Inode = cpu_to_le64(ksmbd_kstat->kstat->ino);
3677                 posix_info->DosAttributes =
3678                         S_ISDIR(ksmbd_kstat->kstat->mode) ?
3679                                 FILE_ATTRIBUTE_DIRECTORY_LE : FILE_ATTRIBUTE_ARCHIVE_LE;
3680                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3681                         posix_info->DosAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3682                 /*
3683                  * SidBuffer(32) contain two sids(Domain sid(16), UNIX group sid(16)).
3684                  * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) +
3685                  *                sub_auth(4 * 1(num_subauth)) + RID(4).
3686                  */
3687                 id_to_sid(from_kuid_munged(&init_user_ns, ksmbd_kstat->kstat->uid),
3688                           SIDUNIX_USER, (struct smb_sid *)&posix_info->SidBuffer[0]);
3689                 id_to_sid(from_kgid_munged(&init_user_ns, ksmbd_kstat->kstat->gid),
3690                           SIDUNIX_GROUP, (struct smb_sid *)&posix_info->SidBuffer[16]);
3691                 memcpy(posix_info->name, conv_name, conv_len);
3692                 posix_info->name_len = cpu_to_le32(conv_len);
3693                 posix_info->NextEntryOffset = cpu_to_le32(next_entry_offset);
3694                 break;
3695         }
3696
3697         } /* switch (info_level) */
3698
3699         d_info->last_entry_offset = d_info->data_count;
3700         d_info->data_count += next_entry_offset;
3701         d_info->out_buf_len -= next_entry_offset;
3702         d_info->wptr += next_entry_offset;
3703
3704         ksmbd_debug(SMB,
3705                     "info_level : %d, buf_len :%d, next_offset : %d, data_count : %d\n",
3706                     info_level, d_info->out_buf_len,
3707                     next_entry_offset, d_info->data_count);
3708
3709 free_conv_name:
3710         kfree(conv_name);
3711         return rc;
3712 }
3713
3714 struct smb2_query_dir_private {
3715         struct ksmbd_work       *work;
3716         char                    *search_pattern;
3717         struct ksmbd_file       *dir_fp;
3718
3719         struct ksmbd_dir_info   *d_info;
3720         int                     info_level;
3721 };
3722
3723 static void lock_dir(struct ksmbd_file *dir_fp)
3724 {
3725         struct dentry *dir = dir_fp->filp->f_path.dentry;
3726
3727         inode_lock_nested(d_inode(dir), I_MUTEX_PARENT);
3728 }
3729
3730 static void unlock_dir(struct ksmbd_file *dir_fp)
3731 {
3732         struct dentry *dir = dir_fp->filp->f_path.dentry;
3733
3734         inode_unlock(d_inode(dir));
3735 }
3736
3737 static int process_query_dir_entries(struct smb2_query_dir_private *priv)
3738 {
3739         struct mnt_idmap        *idmap = file_mnt_idmap(priv->dir_fp->filp);
3740         struct kstat            kstat;
3741         struct ksmbd_kstat      ksmbd_kstat;
3742         int                     rc;
3743         int                     i;
3744
3745         for (i = 0; i < priv->d_info->num_entry; i++) {
3746                 struct dentry *dent;
3747
3748                 if (dentry_name(priv->d_info, priv->info_level))
3749                         return -EINVAL;
3750
3751                 lock_dir(priv->dir_fp);
3752                 dent = lookup_one(idmap, priv->d_info->name,
3753                                   priv->dir_fp->filp->f_path.dentry,
3754                                   priv->d_info->name_len);
3755                 unlock_dir(priv->dir_fp);
3756
3757                 if (IS_ERR(dent)) {
3758                         ksmbd_debug(SMB, "Cannot lookup `%s' [%ld]\n",
3759                                     priv->d_info->name,
3760                                     PTR_ERR(dent));
3761                         continue;
3762                 }
3763                 if (unlikely(d_is_negative(dent))) {
3764                         dput(dent);
3765                         ksmbd_debug(SMB, "Negative dentry `%s'\n",
3766                                     priv->d_info->name);
3767                         continue;
3768                 }
3769
3770                 ksmbd_kstat.kstat = &kstat;
3771                 if (priv->info_level != FILE_NAMES_INFORMATION)
3772                         ksmbd_vfs_fill_dentry_attrs(priv->work,
3773                                                     idmap,
3774                                                     dent,
3775                                                     &ksmbd_kstat);
3776
3777                 rc = smb2_populate_readdir_entry(priv->work->conn,
3778                                                  priv->info_level,
3779                                                  priv->d_info,
3780                                                  &ksmbd_kstat);
3781                 dput(dent);
3782                 if (rc)
3783                         return rc;
3784         }
3785         return 0;
3786 }
3787
3788 static int reserve_populate_dentry(struct ksmbd_dir_info *d_info,
3789                                    int info_level)
3790 {
3791         int struct_sz;
3792         int conv_len;
3793         int next_entry_offset;
3794
3795         struct_sz = readdir_info_level_struct_sz(info_level);
3796         if (struct_sz == -EOPNOTSUPP)
3797                 return -EOPNOTSUPP;
3798
3799         conv_len = (d_info->name_len + 1) * 2;
3800         next_entry_offset = ALIGN(struct_sz + conv_len,
3801                                   KSMBD_DIR_INFO_ALIGNMENT);
3802
3803         if (next_entry_offset > d_info->out_buf_len) {
3804                 d_info->out_buf_len = 0;
3805                 return -ENOSPC;
3806         }
3807
3808         switch (info_level) {
3809         case FILE_FULL_DIRECTORY_INFORMATION:
3810         {
3811                 struct file_full_directory_info *ffdinfo;
3812
3813                 ffdinfo = (struct file_full_directory_info *)d_info->wptr;
3814                 memcpy(ffdinfo->FileName, d_info->name, d_info->name_len);
3815                 ffdinfo->FileName[d_info->name_len] = 0x00;
3816                 ffdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3817                 ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3818                 break;
3819         }
3820         case FILE_BOTH_DIRECTORY_INFORMATION:
3821         {
3822                 struct file_both_directory_info *fbdinfo;
3823
3824                 fbdinfo = (struct file_both_directory_info *)d_info->wptr;
3825                 memcpy(fbdinfo->FileName, d_info->name, d_info->name_len);
3826                 fbdinfo->FileName[d_info->name_len] = 0x00;
3827                 fbdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3828                 fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3829                 break;
3830         }
3831         case FILE_DIRECTORY_INFORMATION:
3832         {
3833                 struct file_directory_info *fdinfo;
3834
3835                 fdinfo = (struct file_directory_info *)d_info->wptr;
3836                 memcpy(fdinfo->FileName, d_info->name, d_info->name_len);
3837                 fdinfo->FileName[d_info->name_len] = 0x00;
3838                 fdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3839                 fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3840                 break;
3841         }
3842         case FILE_NAMES_INFORMATION:
3843         {
3844                 struct file_names_info *fninfo;
3845
3846                 fninfo = (struct file_names_info *)d_info->wptr;
3847                 memcpy(fninfo->FileName, d_info->name, d_info->name_len);
3848                 fninfo->FileName[d_info->name_len] = 0x00;
3849                 fninfo->FileNameLength = cpu_to_le32(d_info->name_len);
3850                 fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3851                 break;
3852         }
3853         case FILEID_FULL_DIRECTORY_INFORMATION:
3854         {
3855                 struct file_id_full_dir_info *dinfo;
3856
3857                 dinfo = (struct file_id_full_dir_info *)d_info->wptr;
3858                 memcpy(dinfo->FileName, d_info->name, d_info->name_len);
3859                 dinfo->FileName[d_info->name_len] = 0x00;
3860                 dinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3861                 dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3862                 break;
3863         }
3864         case FILEID_BOTH_DIRECTORY_INFORMATION:
3865         {
3866                 struct file_id_both_directory_info *fibdinfo;
3867
3868                 fibdinfo = (struct file_id_both_directory_info *)d_info->wptr;
3869                 memcpy(fibdinfo->FileName, d_info->name, d_info->name_len);
3870                 fibdinfo->FileName[d_info->name_len] = 0x00;
3871                 fibdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3872                 fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3873                 break;
3874         }
3875         case SMB_FIND_FILE_POSIX_INFO:
3876         {
3877                 struct smb2_posix_info *posix_info;
3878
3879                 posix_info = (struct smb2_posix_info *)d_info->wptr;
3880                 memcpy(posix_info->name, d_info->name, d_info->name_len);
3881                 posix_info->name[d_info->name_len] = 0x00;
3882                 posix_info->name_len = cpu_to_le32(d_info->name_len);
3883                 posix_info->NextEntryOffset =
3884                         cpu_to_le32(next_entry_offset);
3885                 break;
3886         }
3887         } /* switch (info_level) */
3888
3889         d_info->num_entry++;
3890         d_info->out_buf_len -= next_entry_offset;
3891         d_info->wptr += next_entry_offset;
3892         return 0;
3893 }
3894
3895 static bool __query_dir(struct dir_context *ctx, const char *name, int namlen,
3896                        loff_t offset, u64 ino, unsigned int d_type)
3897 {
3898         struct ksmbd_readdir_data       *buf;
3899         struct smb2_query_dir_private   *priv;
3900         struct ksmbd_dir_info           *d_info;
3901         int                             rc;
3902
3903         buf     = container_of(ctx, struct ksmbd_readdir_data, ctx);
3904         priv    = buf->private;
3905         d_info  = priv->d_info;
3906
3907         /* dot and dotdot entries are already reserved */
3908         if (!strcmp(".", name) || !strcmp("..", name))
3909                 return true;
3910         if (ksmbd_share_veto_filename(priv->work->tcon->share_conf, name))
3911                 return true;
3912         if (!match_pattern(name, namlen, priv->search_pattern))
3913                 return true;
3914
3915         d_info->name            = name;
3916         d_info->name_len        = namlen;
3917         rc = reserve_populate_dentry(d_info, priv->info_level);
3918         if (rc)
3919                 return false;
3920         if (d_info->flags & SMB2_RETURN_SINGLE_ENTRY)
3921                 d_info->out_buf_len = 0;
3922         return true;
3923 }
3924
3925 static int verify_info_level(int info_level)
3926 {
3927         switch (info_level) {
3928         case FILE_FULL_DIRECTORY_INFORMATION:
3929         case FILE_BOTH_DIRECTORY_INFORMATION:
3930         case FILE_DIRECTORY_INFORMATION:
3931         case FILE_NAMES_INFORMATION:
3932         case FILEID_FULL_DIRECTORY_INFORMATION:
3933         case FILEID_BOTH_DIRECTORY_INFORMATION:
3934         case SMB_FIND_FILE_POSIX_INFO:
3935                 break;
3936         default:
3937                 return -EOPNOTSUPP;
3938         }
3939
3940         return 0;
3941 }
3942
3943 static int smb2_resp_buf_len(struct ksmbd_work *work, unsigned short hdr2_len)
3944 {
3945         int free_len;
3946
3947         free_len = (int)(work->response_sz -
3948                 (get_rfc1002_len(work->response_buf) + 4)) - hdr2_len;
3949         return free_len;
3950 }
3951
3952 static int smb2_calc_max_out_buf_len(struct ksmbd_work *work,
3953                                      unsigned short hdr2_len,
3954                                      unsigned int out_buf_len)
3955 {
3956         int free_len;
3957
3958         if (out_buf_len > work->conn->vals->max_trans_size)
3959                 return -EINVAL;
3960
3961         free_len = smb2_resp_buf_len(work, hdr2_len);
3962         if (free_len < 0)
3963                 return -EINVAL;
3964
3965         return min_t(int, out_buf_len, free_len);
3966 }
3967
3968 int smb2_query_dir(struct ksmbd_work *work)
3969 {
3970         struct ksmbd_conn *conn = work->conn;
3971         struct smb2_query_directory_req *req;
3972         struct smb2_query_directory_rsp *rsp;
3973         struct ksmbd_share_config *share = work->tcon->share_conf;
3974         struct ksmbd_file *dir_fp = NULL;
3975         struct ksmbd_dir_info d_info;
3976         int rc = 0;
3977         char *srch_ptr = NULL;
3978         unsigned char srch_flag;
3979         int buffer_sz;
3980         struct smb2_query_dir_private query_dir_private = {NULL, };
3981
3982         WORK_BUFFERS(work, req, rsp);
3983
3984         if (ksmbd_override_fsids(work)) {
3985                 rsp->hdr.Status = STATUS_NO_MEMORY;
3986                 smb2_set_err_rsp(work);
3987                 return -ENOMEM;
3988         }
3989
3990         rc = verify_info_level(req->FileInformationClass);
3991         if (rc) {
3992                 rc = -EFAULT;
3993                 goto err_out2;
3994         }
3995
3996         dir_fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
3997         if (!dir_fp) {
3998                 rc = -EBADF;
3999                 goto err_out2;
4000         }
4001
4002         if (!(dir_fp->daccess & FILE_LIST_DIRECTORY_LE) ||
4003             inode_permission(file_mnt_idmap(dir_fp->filp),
4004                              file_inode(dir_fp->filp),
4005                              MAY_READ | MAY_EXEC)) {
4006                 pr_err("no right to enumerate directory (%pD)\n", dir_fp->filp);
4007                 rc = -EACCES;
4008                 goto err_out2;
4009         }
4010
4011         if (!S_ISDIR(file_inode(dir_fp->filp)->i_mode)) {
4012                 pr_err("can't do query dir for a file\n");
4013                 rc = -EINVAL;
4014                 goto err_out2;
4015         }
4016
4017         srch_flag = req->Flags;
4018         srch_ptr = smb_strndup_from_utf16(req->Buffer,
4019                                           le16_to_cpu(req->FileNameLength), 1,
4020                                           conn->local_nls);
4021         if (IS_ERR(srch_ptr)) {
4022                 ksmbd_debug(SMB, "Search Pattern not found\n");
4023                 rc = -EINVAL;
4024                 goto err_out2;
4025         } else {
4026                 ksmbd_debug(SMB, "Search pattern is %s\n", srch_ptr);
4027         }
4028
4029         if (srch_flag & SMB2_REOPEN || srch_flag & SMB2_RESTART_SCANS) {
4030                 ksmbd_debug(SMB, "Restart directory scan\n");
4031                 generic_file_llseek(dir_fp->filp, 0, SEEK_SET);
4032         }
4033
4034         memset(&d_info, 0, sizeof(struct ksmbd_dir_info));
4035         d_info.wptr = (char *)rsp->Buffer;
4036         d_info.rptr = (char *)rsp->Buffer;
4037         d_info.out_buf_len =
4038                 smb2_calc_max_out_buf_len(work, 8,
4039                                           le32_to_cpu(req->OutputBufferLength));
4040         if (d_info.out_buf_len < 0) {
4041                 rc = -EINVAL;
4042                 goto err_out;
4043         }
4044         d_info.flags = srch_flag;
4045
4046         /*
4047          * reserve dot and dotdot entries in head of buffer
4048          * in first response
4049          */
4050         rc = ksmbd_populate_dot_dotdot_entries(work, req->FileInformationClass,
4051                                                dir_fp, &d_info, srch_ptr,
4052                                                smb2_populate_readdir_entry);
4053         if (rc == -ENOSPC)
4054                 rc = 0;
4055         else if (rc)
4056                 goto err_out;
4057
4058         if (test_share_config_flag(share, KSMBD_SHARE_FLAG_HIDE_DOT_FILES))
4059                 d_info.hide_dot_file = true;
4060
4061         buffer_sz                               = d_info.out_buf_len;
4062         d_info.rptr                             = d_info.wptr;
4063         query_dir_private.work                  = work;
4064         query_dir_private.search_pattern        = srch_ptr;
4065         query_dir_private.dir_fp                = dir_fp;
4066         query_dir_private.d_info                = &d_info;
4067         query_dir_private.info_level            = req->FileInformationClass;
4068         dir_fp->readdir_data.private            = &query_dir_private;
4069         set_ctx_actor(&dir_fp->readdir_data.ctx, __query_dir);
4070
4071         rc = iterate_dir(dir_fp->filp, &dir_fp->readdir_data.ctx);
4072         /*
4073          * req->OutputBufferLength is too small to contain even one entry.
4074          * In this case, it immediately returns OutputBufferLength 0 to client.
4075          */
4076         if (!d_info.out_buf_len && !d_info.num_entry)
4077                 goto no_buf_len;
4078         if (rc > 0 || rc == -ENOSPC)
4079                 rc = 0;
4080         else if (rc)
4081                 goto err_out;
4082
4083         d_info.wptr = d_info.rptr;
4084         d_info.out_buf_len = buffer_sz;
4085         rc = process_query_dir_entries(&query_dir_private);
4086         if (rc)
4087                 goto err_out;
4088
4089         if (!d_info.data_count && d_info.out_buf_len >= 0) {
4090                 if (srch_flag & SMB2_RETURN_SINGLE_ENTRY && !is_asterisk(srch_ptr)) {
4091                         rsp->hdr.Status = STATUS_NO_SUCH_FILE;
4092                 } else {
4093                         dir_fp->dot_dotdot[0] = dir_fp->dot_dotdot[1] = 0;
4094                         rsp->hdr.Status = STATUS_NO_MORE_FILES;
4095                 }
4096                 rsp->StructureSize = cpu_to_le16(9);
4097                 rsp->OutputBufferOffset = cpu_to_le16(0);
4098                 rsp->OutputBufferLength = cpu_to_le32(0);
4099                 rsp->Buffer[0] = 0;
4100                 rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
4101                                        sizeof(struct smb2_query_directory_rsp));
4102                 if (rc)
4103                         goto err_out;
4104         } else {
4105 no_buf_len:
4106                 ((struct file_directory_info *)
4107                 ((char *)rsp->Buffer + d_info.last_entry_offset))
4108                 ->NextEntryOffset = 0;
4109                 if (d_info.data_count >= d_info.last_entry_off_align)
4110                         d_info.data_count -= d_info.last_entry_off_align;
4111
4112                 rsp->StructureSize = cpu_to_le16(9);
4113                 rsp->OutputBufferOffset = cpu_to_le16(72);
4114                 rsp->OutputBufferLength = cpu_to_le32(d_info.data_count);
4115                 rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
4116                                        offsetof(struct smb2_query_directory_rsp, Buffer) +
4117                                        d_info.data_count);
4118                 if (rc)
4119                         goto err_out;
4120         }
4121
4122         kfree(srch_ptr);
4123         ksmbd_fd_put(work, dir_fp);
4124         ksmbd_revert_fsids(work);
4125         return 0;
4126
4127 err_out:
4128         pr_err("error while processing smb2 query dir rc = %d\n", rc);
4129         kfree(srch_ptr);
4130
4131 err_out2:
4132         if (rc == -EINVAL)
4133                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
4134         else if (rc == -EACCES)
4135                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
4136         else if (rc == -ENOENT)
4137                 rsp->hdr.Status = STATUS_NO_SUCH_FILE;
4138         else if (rc == -EBADF)
4139                 rsp->hdr.Status = STATUS_FILE_CLOSED;
4140         else if (rc == -ENOMEM)
4141                 rsp->hdr.Status = STATUS_NO_MEMORY;
4142         else if (rc == -EFAULT)
4143                 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
4144         else if (rc == -EIO)
4145                 rsp->hdr.Status = STATUS_FILE_CORRUPT_ERROR;
4146         if (!rsp->hdr.Status)
4147                 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
4148
4149         smb2_set_err_rsp(work);
4150         ksmbd_fd_put(work, dir_fp);
4151         ksmbd_revert_fsids(work);
4152         return 0;
4153 }
4154
4155 /**
4156  * buffer_check_err() - helper function to check buffer errors
4157  * @reqOutputBufferLength:      max buffer length expected in command response
4158  * @rsp:                query info response buffer contains output buffer length
4159  * @rsp_org:            base response buffer pointer in case of chained response
4160  *
4161  * Return:      0 on success, otherwise error
4162  */
4163 static int buffer_check_err(int reqOutputBufferLength,
4164                             struct smb2_query_info_rsp *rsp,
4165                             void *rsp_org)
4166 {
4167         if (reqOutputBufferLength < le32_to_cpu(rsp->OutputBufferLength)) {
4168                 pr_err("Invalid Buffer Size Requested\n");
4169                 rsp->hdr.Status = STATUS_INFO_LENGTH_MISMATCH;
4170                 *(__be32 *)rsp_org = cpu_to_be32(sizeof(struct smb2_hdr));
4171                 return -EINVAL;
4172         }
4173         return 0;
4174 }
4175
4176 static void get_standard_info_pipe(struct smb2_query_info_rsp *rsp,
4177                                    void *rsp_org)
4178 {
4179         struct smb2_file_standard_info *sinfo;
4180
4181         sinfo = (struct smb2_file_standard_info *)rsp->Buffer;
4182
4183         sinfo->AllocationSize = cpu_to_le64(4096);
4184         sinfo->EndOfFile = cpu_to_le64(0);
4185         sinfo->NumberOfLinks = cpu_to_le32(1);
4186         sinfo->DeletePending = 1;
4187         sinfo->Directory = 0;
4188         rsp->OutputBufferLength =
4189                 cpu_to_le32(sizeof(struct smb2_file_standard_info));
4190 }
4191
4192 static void get_internal_info_pipe(struct smb2_query_info_rsp *rsp, u64 num,
4193                                    void *rsp_org)
4194 {
4195         struct smb2_file_internal_info *file_info;
4196
4197         file_info = (struct smb2_file_internal_info *)rsp->Buffer;
4198
4199         /* any unique number */
4200         file_info->IndexNumber = cpu_to_le64(num | (1ULL << 63));
4201         rsp->OutputBufferLength =
4202                 cpu_to_le32(sizeof(struct smb2_file_internal_info));
4203 }
4204
4205 static int smb2_get_info_file_pipe(struct ksmbd_session *sess,
4206                                    struct smb2_query_info_req *req,
4207                                    struct smb2_query_info_rsp *rsp,
4208                                    void *rsp_org)
4209 {
4210         u64 id;
4211         int rc;
4212
4213         /*
4214          * Windows can sometime send query file info request on
4215          * pipe without opening it, checking error condition here
4216          */
4217         id = req->VolatileFileId;
4218         if (!ksmbd_session_rpc_method(sess, id))
4219                 return -ENOENT;
4220
4221         ksmbd_debug(SMB, "FileInfoClass %u, FileId 0x%llx\n",
4222                     req->FileInfoClass, req->VolatileFileId);
4223
4224         switch (req->FileInfoClass) {
4225         case FILE_STANDARD_INFORMATION:
4226                 get_standard_info_pipe(rsp, rsp_org);
4227                 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
4228                                       rsp, rsp_org);
4229                 break;
4230         case FILE_INTERNAL_INFORMATION:
4231                 get_internal_info_pipe(rsp, id, rsp_org);
4232                 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
4233                                       rsp, rsp_org);
4234                 break;
4235         default:
4236                 ksmbd_debug(SMB, "smb2_info_file_pipe for %u not supported\n",
4237                             req->FileInfoClass);
4238                 rc = -EOPNOTSUPP;
4239         }
4240         return rc;
4241 }
4242
4243 /**
4244  * smb2_get_ea() - handler for smb2 get extended attribute command
4245  * @work:       smb work containing query info command buffer
4246  * @fp:         ksmbd_file pointer
4247  * @req:        get extended attribute request
4248  * @rsp:        response buffer pointer
4249  * @rsp_org:    base response buffer pointer in case of chained response
4250  *
4251  * Return:      0 on success, otherwise error
4252  */
4253 static int smb2_get_ea(struct ksmbd_work *work, struct ksmbd_file *fp,
4254                        struct smb2_query_info_req *req,
4255                        struct smb2_query_info_rsp *rsp, void *rsp_org)
4256 {
4257         struct smb2_ea_info *eainfo, *prev_eainfo;
4258         char *name, *ptr, *xattr_list = NULL, *buf;
4259         int rc, name_len, value_len, xattr_list_len, idx;
4260         ssize_t buf_free_len, alignment_bytes, next_offset, rsp_data_cnt = 0;
4261         struct smb2_ea_info_req *ea_req = NULL;
4262         const struct path *path;
4263         struct mnt_idmap *idmap = file_mnt_idmap(fp->filp);
4264
4265         if (!(fp->daccess & FILE_READ_EA_LE)) {
4266                 pr_err("Not permitted to read ext attr : 0x%x\n",
4267                        fp->daccess);
4268                 return -EACCES;
4269         }
4270
4271         path = &fp->filp->f_path;
4272         /* single EA entry is requested with given user.* name */
4273         if (req->InputBufferLength) {
4274                 if (le32_to_cpu(req->InputBufferLength) <
4275                     sizeof(struct smb2_ea_info_req))
4276                         return -EINVAL;
4277
4278                 ea_req = (struct smb2_ea_info_req *)req->Buffer;
4279         } else {
4280                 /* need to send all EAs, if no specific EA is requested*/
4281                 if (le32_to_cpu(req->Flags) & SL_RETURN_SINGLE_ENTRY)
4282                         ksmbd_debug(SMB,
4283                                     "All EAs are requested but need to send single EA entry in rsp flags 0x%x\n",
4284                                     le32_to_cpu(req->Flags));
4285         }
4286
4287         buf_free_len =
4288                 smb2_calc_max_out_buf_len(work, 8,
4289                                           le32_to_cpu(req->OutputBufferLength));
4290         if (buf_free_len < 0)
4291                 return -EINVAL;
4292
4293         rc = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
4294         if (rc < 0) {
4295                 rsp->hdr.Status = STATUS_INVALID_HANDLE;
4296                 goto out;
4297         } else if (!rc) { /* there is no EA in the file */
4298                 ksmbd_debug(SMB, "no ea data in the file\n");
4299                 goto done;
4300         }
4301         xattr_list_len = rc;
4302
4303         ptr = (char *)rsp->Buffer;
4304         eainfo = (struct smb2_ea_info *)ptr;
4305         prev_eainfo = eainfo;
4306         idx = 0;
4307
4308         while (idx < xattr_list_len) {
4309                 name = xattr_list + idx;
4310                 name_len = strlen(name);
4311
4312                 ksmbd_debug(SMB, "%s, len %d\n", name, name_len);
4313                 idx += name_len + 1;
4314
4315                 /*
4316                  * CIFS does not support EA other than user.* namespace,
4317                  * still keep the framework generic, to list other attrs
4318                  * in future.
4319                  */
4320                 if (strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4321                         continue;
4322
4323                 if (!strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX,
4324                              STREAM_PREFIX_LEN))
4325                         continue;
4326
4327                 if (req->InputBufferLength &&
4328                     strncmp(&name[XATTR_USER_PREFIX_LEN], ea_req->name,
4329                             ea_req->EaNameLength))
4330                         continue;
4331
4332                 if (!strncmp(&name[XATTR_USER_PREFIX_LEN],
4333                              DOS_ATTRIBUTE_PREFIX, DOS_ATTRIBUTE_PREFIX_LEN))
4334                         continue;
4335
4336                 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4337                         name_len -= XATTR_USER_PREFIX_LEN;
4338
4339                 ptr = eainfo->name + name_len + 1;
4340                 buf_free_len -= (offsetof(struct smb2_ea_info, name) +
4341                                 name_len + 1);
4342                 /* bailout if xattr can't fit in buf_free_len */
4343                 value_len = ksmbd_vfs_getxattr(idmap, path->dentry,
4344                                                name, &buf);
4345                 if (value_len <= 0) {
4346                         rc = -ENOENT;
4347                         rsp->hdr.Status = STATUS_INVALID_HANDLE;
4348                         goto out;
4349                 }
4350
4351                 buf_free_len -= value_len;
4352                 if (buf_free_len < 0) {
4353                         kfree(buf);
4354                         break;
4355                 }
4356
4357                 memcpy(ptr, buf, value_len);
4358                 kfree(buf);
4359
4360                 ptr += value_len;
4361                 eainfo->Flags = 0;
4362                 eainfo->EaNameLength = name_len;
4363
4364                 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4365                         memcpy(eainfo->name, &name[XATTR_USER_PREFIX_LEN],
4366                                name_len);
4367                 else
4368                         memcpy(eainfo->name, name, name_len);
4369
4370                 eainfo->name[name_len] = '\0';
4371                 eainfo->EaValueLength = cpu_to_le16(value_len);
4372                 next_offset = offsetof(struct smb2_ea_info, name) +
4373                         name_len + 1 + value_len;
4374
4375                 /* align next xattr entry at 4 byte bundary */
4376                 alignment_bytes = ((next_offset + 3) & ~3) - next_offset;
4377                 if (alignment_bytes) {
4378                         memset(ptr, '\0', alignment_bytes);
4379                         ptr += alignment_bytes;
4380                         next_offset += alignment_bytes;
4381                         buf_free_len -= alignment_bytes;
4382                 }
4383                 eainfo->NextEntryOffset = cpu_to_le32(next_offset);
4384                 prev_eainfo = eainfo;
4385                 eainfo = (struct smb2_ea_info *)ptr;
4386                 rsp_data_cnt += next_offset;
4387
4388                 if (req->InputBufferLength) {
4389                         ksmbd_debug(SMB, "single entry requested\n");
4390                         break;
4391                 }
4392         }
4393
4394         /* no more ea entries */
4395         prev_eainfo->NextEntryOffset = 0;
4396 done:
4397         rc = 0;
4398         if (rsp_data_cnt == 0)
4399                 rsp->hdr.Status = STATUS_NO_EAS_ON_FILE;
4400         rsp->OutputBufferLength = cpu_to_le32(rsp_data_cnt);
4401 out:
4402         kvfree(xattr_list);
4403         return rc;
4404 }
4405
4406 static void get_file_access_info(struct smb2_query_info_rsp *rsp,
4407                                  struct ksmbd_file *fp, void *rsp_org)
4408 {
4409         struct smb2_file_access_info *file_info;
4410
4411         file_info = (struct smb2_file_access_info *)rsp->Buffer;
4412         file_info->AccessFlags = fp->daccess;
4413         rsp->OutputBufferLength =
4414                 cpu_to_le32(sizeof(struct smb2_file_access_info));
4415 }
4416
4417 static int get_file_basic_info(struct smb2_query_info_rsp *rsp,
4418                                struct ksmbd_file *fp, void *rsp_org)
4419 {
4420         struct smb2_file_basic_info *basic_info;
4421         struct kstat stat;
4422         u64 time;
4423
4424         if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4425                 pr_err("no right to read the attributes : 0x%x\n",
4426                        fp->daccess);
4427                 return -EACCES;
4428         }
4429
4430         basic_info = (struct smb2_file_basic_info *)rsp->Buffer;
4431         generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS,
4432                          file_inode(fp->filp), &stat);
4433         basic_info->CreationTime = cpu_to_le64(fp->create_time);
4434         time = ksmbd_UnixTimeToNT(stat.atime);
4435         basic_info->LastAccessTime = cpu_to_le64(time);
4436         time = ksmbd_UnixTimeToNT(stat.mtime);
4437         basic_info->LastWriteTime = cpu_to_le64(time);
4438         time = ksmbd_UnixTimeToNT(stat.ctime);
4439         basic_info->ChangeTime = cpu_to_le64(time);
4440         basic_info->Attributes = fp->f_ci->m_fattr;
4441         basic_info->Pad1 = 0;
4442         rsp->OutputBufferLength =
4443                 cpu_to_le32(sizeof(struct smb2_file_basic_info));
4444         return 0;
4445 }
4446
4447 static void get_file_standard_info(struct smb2_query_info_rsp *rsp,
4448                                    struct ksmbd_file *fp, void *rsp_org)
4449 {
4450         struct smb2_file_standard_info *sinfo;
4451         unsigned int delete_pending;
4452         struct inode *inode;
4453         struct kstat stat;
4454
4455         inode = file_inode(fp->filp);
4456         generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS, inode, &stat);
4457
4458         sinfo = (struct smb2_file_standard_info *)rsp->Buffer;
4459         delete_pending = ksmbd_inode_pending_delete(fp);
4460
4461         sinfo->AllocationSize = cpu_to_le64(inode->i_blocks << 9);
4462         sinfo->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
4463         sinfo->NumberOfLinks = cpu_to_le32(get_nlink(&stat) - delete_pending);
4464         sinfo->DeletePending = delete_pending;
4465         sinfo->Directory = S_ISDIR(stat.mode) ? 1 : 0;
4466         rsp->OutputBufferLength =
4467                 cpu_to_le32(sizeof(struct smb2_file_standard_info));
4468 }
4469
4470 static void get_file_alignment_info(struct smb2_query_info_rsp *rsp,
4471                                     void *rsp_org)
4472 {
4473         struct smb2_file_alignment_info *file_info;
4474
4475         file_info = (struct smb2_file_alignment_info *)rsp->Buffer;
4476         file_info->AlignmentRequirement = 0;
4477         rsp->OutputBufferLength =
4478                 cpu_to_le32(sizeof(struct smb2_file_alignment_info));
4479 }
4480
4481 static int get_file_all_info(struct ksmbd_work *work,
4482                              struct smb2_query_info_rsp *rsp,
4483                              struct ksmbd_file *fp,
4484                              void *rsp_org)
4485 {
4486         struct ksmbd_conn *conn = work->conn;
4487         struct smb2_file_all_info *file_info;
4488         unsigned int delete_pending;
4489         struct inode *inode;
4490         struct kstat stat;
4491         int conv_len;
4492         char *filename;
4493         u64 time;
4494
4495         if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4496                 ksmbd_debug(SMB, "no right to read the attributes : 0x%x\n",
4497                             fp->daccess);
4498                 return -EACCES;
4499         }
4500
4501         filename = convert_to_nt_pathname(work->tcon->share_conf, &fp->filp->f_path);
4502         if (IS_ERR(filename))
4503                 return PTR_ERR(filename);
4504
4505         inode = file_inode(fp->filp);
4506         generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS, inode, &stat);
4507
4508         ksmbd_debug(SMB, "filename = %s\n", filename);
4509         delete_pending = ksmbd_inode_pending_delete(fp);
4510         file_info = (struct smb2_file_all_info *)rsp->Buffer;
4511
4512         file_info->CreationTime = cpu_to_le64(fp->create_time);
4513         time = ksmbd_UnixTimeToNT(stat.atime);
4514         file_info->LastAccessTime = cpu_to_le64(time);
4515         time = ksmbd_UnixTimeToNT(stat.mtime);
4516         file_info->LastWriteTime = cpu_to_le64(time);
4517         time = ksmbd_UnixTimeToNT(stat.ctime);
4518         file_info->ChangeTime = cpu_to_le64(time);
4519         file_info->Attributes = fp->f_ci->m_fattr;
4520         file_info->Pad1 = 0;
4521         file_info->AllocationSize =
4522                 cpu_to_le64(inode->i_blocks << 9);
4523         file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
4524         file_info->NumberOfLinks =
4525                         cpu_to_le32(get_nlink(&stat) - delete_pending);
4526         file_info->DeletePending = delete_pending;
4527         file_info->Directory = S_ISDIR(stat.mode) ? 1 : 0;
4528         file_info->Pad2 = 0;
4529         file_info->IndexNumber = cpu_to_le64(stat.ino);
4530         file_info->EASize = 0;
4531         file_info->AccessFlags = fp->daccess;
4532         file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos);
4533         file_info->Mode = fp->coption;
4534         file_info->AlignmentRequirement = 0;
4535         conv_len = smbConvertToUTF16((__le16 *)file_info->FileName, filename,
4536                                      PATH_MAX, conn->local_nls, 0);
4537         conv_len *= 2;
4538         file_info->FileNameLength = cpu_to_le32(conv_len);
4539         rsp->OutputBufferLength =
4540                 cpu_to_le32(sizeof(struct smb2_file_all_info) + conv_len - 1);
4541         kfree(filename);
4542         return 0;
4543 }
4544
4545 static void get_file_alternate_info(struct ksmbd_work *work,
4546                                     struct smb2_query_info_rsp *rsp,
4547                                     struct ksmbd_file *fp,
4548                                     void *rsp_org)
4549 {
4550         struct ksmbd_conn *conn = work->conn;
4551         struct smb2_file_alt_name_info *file_info;
4552         struct dentry *dentry = fp->filp->f_path.dentry;
4553         int conv_len;
4554
4555         spin_lock(&dentry->d_lock);
4556         file_info = (struct smb2_file_alt_name_info *)rsp->Buffer;
4557         conv_len = ksmbd_extract_shortname(conn,
4558                                            dentry->d_name.name,
4559                                            file_info->FileName);
4560         spin_unlock(&dentry->d_lock);
4561         file_info->FileNameLength = cpu_to_le32(conv_len);
4562         rsp->OutputBufferLength =
4563                 cpu_to_le32(sizeof(struct smb2_file_alt_name_info) + conv_len);
4564 }
4565
4566 static void get_file_stream_info(struct ksmbd_work *work,
4567                                  struct smb2_query_info_rsp *rsp,
4568                                  struct ksmbd_file *fp,
4569                                  void *rsp_org)
4570 {
4571         struct ksmbd_conn *conn = work->conn;
4572         struct smb2_file_stream_info *file_info;
4573         char *stream_name, *xattr_list = NULL, *stream_buf;
4574         struct kstat stat;
4575         const struct path *path = &fp->filp->f_path;
4576         ssize_t xattr_list_len;
4577         int nbytes = 0, streamlen, stream_name_len, next, idx = 0;
4578         int buf_free_len;
4579         struct smb2_query_info_req *req = ksmbd_req_buf_next(work);
4580
4581         generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS,
4582                          file_inode(fp->filp), &stat);
4583         file_info = (struct smb2_file_stream_info *)rsp->Buffer;
4584
4585         buf_free_len =
4586                 smb2_calc_max_out_buf_len(work, 8,
4587                                           le32_to_cpu(req->OutputBufferLength));
4588         if (buf_free_len < 0)
4589                 goto out;
4590
4591         xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
4592         if (xattr_list_len < 0) {
4593                 goto out;
4594         } else if (!xattr_list_len) {
4595                 ksmbd_debug(SMB, "empty xattr in the file\n");
4596                 goto out;
4597         }
4598
4599         while (idx < xattr_list_len) {
4600                 stream_name = xattr_list + idx;
4601                 streamlen = strlen(stream_name);
4602                 idx += streamlen + 1;
4603
4604                 ksmbd_debug(SMB, "%s, len %d\n", stream_name, streamlen);
4605
4606                 if (strncmp(&stream_name[XATTR_USER_PREFIX_LEN],
4607                             STREAM_PREFIX, STREAM_PREFIX_LEN))
4608                         continue;
4609
4610                 stream_name_len = streamlen - (XATTR_USER_PREFIX_LEN +
4611                                 STREAM_PREFIX_LEN);
4612                 streamlen = stream_name_len;
4613
4614                 /* plus : size */
4615                 streamlen += 1;
4616                 stream_buf = kmalloc(streamlen + 1, GFP_KERNEL);
4617                 if (!stream_buf)
4618                         break;
4619
4620                 streamlen = snprintf(stream_buf, streamlen + 1,
4621                                      ":%s", &stream_name[XATTR_NAME_STREAM_LEN]);
4622
4623                 next = sizeof(struct smb2_file_stream_info) + streamlen * 2;
4624                 if (next > buf_free_len) {
4625                         kfree(stream_buf);
4626                         break;
4627                 }
4628
4629                 file_info = (struct smb2_file_stream_info *)&rsp->Buffer[nbytes];
4630                 streamlen  = smbConvertToUTF16((__le16 *)file_info->StreamName,
4631                                                stream_buf, streamlen,
4632                                                conn->local_nls, 0);
4633                 streamlen *= 2;
4634                 kfree(stream_buf);
4635                 file_info->StreamNameLength = cpu_to_le32(streamlen);
4636                 file_info->StreamSize = cpu_to_le64(stream_name_len);
4637                 file_info->StreamAllocationSize = cpu_to_le64(stream_name_len);
4638
4639                 nbytes += next;
4640                 buf_free_len -= next;
4641                 file_info->NextEntryOffset = cpu_to_le32(next);
4642         }
4643
4644 out:
4645         if (!S_ISDIR(stat.mode) &&
4646             buf_free_len >= sizeof(struct smb2_file_stream_info) + 7 * 2) {
4647                 file_info = (struct smb2_file_stream_info *)
4648                         &rsp->Buffer[nbytes];
4649                 streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName,
4650                                               "::$DATA", 7, conn->local_nls, 0);
4651                 streamlen *= 2;
4652                 file_info->StreamNameLength = cpu_to_le32(streamlen);
4653                 file_info->StreamSize = cpu_to_le64(stat.size);
4654                 file_info->StreamAllocationSize = cpu_to_le64(stat.blocks << 9);
4655                 nbytes += sizeof(struct smb2_file_stream_info) + streamlen;
4656         }
4657
4658         /* last entry offset should be 0 */
4659         file_info->NextEntryOffset = 0;
4660         kvfree(xattr_list);
4661
4662         rsp->OutputBufferLength = cpu_to_le32(nbytes);
4663 }
4664
4665 static void get_file_internal_info(struct smb2_query_info_rsp *rsp,
4666                                    struct ksmbd_file *fp, void *rsp_org)
4667 {
4668         struct smb2_file_internal_info *file_info;
4669         struct kstat stat;
4670
4671         generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS,
4672                          file_inode(fp->filp), &stat);
4673         file_info = (struct smb2_file_internal_info *)rsp->Buffer;
4674         file_info->IndexNumber = cpu_to_le64(stat.ino);
4675         rsp->OutputBufferLength =
4676                 cpu_to_le32(sizeof(struct smb2_file_internal_info));
4677 }
4678
4679 static int get_file_network_open_info(struct smb2_query_info_rsp *rsp,
4680                                       struct ksmbd_file *fp, void *rsp_org)
4681 {
4682         struct smb2_file_ntwrk_info *file_info;
4683         struct inode *inode;
4684         struct kstat stat;
4685         u64 time;
4686
4687         if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4688                 pr_err("no right to read the attributes : 0x%x\n",
4689                        fp->daccess);
4690                 return -EACCES;
4691         }
4692
4693         file_info = (struct smb2_file_ntwrk_info *)rsp->Buffer;
4694
4695         inode = file_inode(fp->filp);
4696         generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS, inode, &stat);
4697
4698         file_info->CreationTime = cpu_to_le64(fp->create_time);
4699         time = ksmbd_UnixTimeToNT(stat.atime);
4700         file_info->LastAccessTime = cpu_to_le64(time);
4701         time = ksmbd_UnixTimeToNT(stat.mtime);
4702         file_info->LastWriteTime = cpu_to_le64(time);
4703         time = ksmbd_UnixTimeToNT(stat.ctime);
4704         file_info->ChangeTime = cpu_to_le64(time);
4705         file_info->Attributes = fp->f_ci->m_fattr;
4706         file_info->AllocationSize =
4707                 cpu_to_le64(inode->i_blocks << 9);
4708         file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
4709         file_info->Reserved = cpu_to_le32(0);
4710         rsp->OutputBufferLength =
4711                 cpu_to_le32(sizeof(struct smb2_file_ntwrk_info));
4712         return 0;
4713 }
4714
4715 static void get_file_ea_info(struct smb2_query_info_rsp *rsp, void *rsp_org)
4716 {
4717         struct smb2_file_ea_info *file_info;
4718
4719         file_info = (struct smb2_file_ea_info *)rsp->Buffer;
4720         file_info->EASize = 0;
4721         rsp->OutputBufferLength =
4722                 cpu_to_le32(sizeof(struct smb2_file_ea_info));
4723 }
4724
4725 static void get_file_position_info(struct smb2_query_info_rsp *rsp,
4726                                    struct ksmbd_file *fp, void *rsp_org)
4727 {
4728         struct smb2_file_pos_info *file_info;
4729
4730         file_info = (struct smb2_file_pos_info *)rsp->Buffer;
4731         file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos);
4732         rsp->OutputBufferLength =
4733                 cpu_to_le32(sizeof(struct smb2_file_pos_info));
4734 }
4735
4736 static void get_file_mode_info(struct smb2_query_info_rsp *rsp,
4737                                struct ksmbd_file *fp, void *rsp_org)
4738 {
4739         struct smb2_file_mode_info *file_info;
4740
4741         file_info = (struct smb2_file_mode_info *)rsp->Buffer;
4742         file_info->Mode = fp->coption & FILE_MODE_INFO_MASK;
4743         rsp->OutputBufferLength =
4744                 cpu_to_le32(sizeof(struct smb2_file_mode_info));
4745 }
4746
4747 static void get_file_compression_info(struct smb2_query_info_rsp *rsp,
4748                                       struct ksmbd_file *fp, void *rsp_org)
4749 {
4750         struct smb2_file_comp_info *file_info;
4751         struct kstat stat;
4752
4753         generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS,
4754                          file_inode(fp->filp), &stat);
4755
4756         file_info = (struct smb2_file_comp_info *)rsp->Buffer;
4757         file_info->CompressedFileSize = cpu_to_le64(stat.blocks << 9);
4758         file_info->CompressionFormat = COMPRESSION_FORMAT_NONE;
4759         file_info->CompressionUnitShift = 0;
4760         file_info->ChunkShift = 0;
4761         file_info->ClusterShift = 0;
4762         memset(&file_info->Reserved[0], 0, 3);
4763
4764         rsp->OutputBufferLength =
4765                 cpu_to_le32(sizeof(struct smb2_file_comp_info));
4766 }
4767
4768 static int get_file_attribute_tag_info(struct smb2_query_info_rsp *rsp,
4769                                        struct ksmbd_file *fp, void *rsp_org)
4770 {
4771         struct smb2_file_attr_tag_info *file_info;
4772
4773         if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4774                 pr_err("no right to read the attributes : 0x%x\n",
4775                        fp->daccess);
4776                 return -EACCES;
4777         }
4778
4779         file_info = (struct smb2_file_attr_tag_info *)rsp->Buffer;
4780         file_info->FileAttributes = fp->f_ci->m_fattr;
4781         file_info->ReparseTag = 0;
4782         rsp->OutputBufferLength =
4783                 cpu_to_le32(sizeof(struct smb2_file_attr_tag_info));
4784         return 0;
4785 }
4786
4787 static void find_file_posix_info(struct smb2_query_info_rsp *rsp,
4788                                 struct ksmbd_file *fp, void *rsp_org)
4789 {
4790         struct smb311_posix_qinfo *file_info;
4791         struct inode *inode = file_inode(fp->filp);
4792         struct mnt_idmap *idmap = file_mnt_idmap(fp->filp);
4793         vfsuid_t vfsuid = i_uid_into_vfsuid(idmap, inode);
4794         vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode);
4795         u64 time;
4796         int out_buf_len = sizeof(struct smb311_posix_qinfo) + 32;
4797
4798         file_info = (struct smb311_posix_qinfo *)rsp->Buffer;
4799         file_info->CreationTime = cpu_to_le64(fp->create_time);
4800         time = ksmbd_UnixTimeToNT(inode->i_atime);
4801         file_info->LastAccessTime = cpu_to_le64(time);
4802         time = ksmbd_UnixTimeToNT(inode->i_mtime);
4803         file_info->LastWriteTime = cpu_to_le64(time);
4804         time = ksmbd_UnixTimeToNT(inode_get_ctime(inode));
4805         file_info->ChangeTime = cpu_to_le64(time);
4806         file_info->DosAttributes = fp->f_ci->m_fattr;
4807         file_info->Inode = cpu_to_le64(inode->i_ino);
4808         file_info->EndOfFile = cpu_to_le64(inode->i_size);
4809         file_info->AllocationSize = cpu_to_le64(inode->i_blocks << 9);
4810         file_info->HardLinks = cpu_to_le32(inode->i_nlink);
4811         file_info->Mode = cpu_to_le32(inode->i_mode & 0777);
4812         file_info->DeviceId = cpu_to_le32(inode->i_rdev);
4813
4814         /*
4815          * Sids(32) contain two sids(Domain sid(16), UNIX group sid(16)).
4816          * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) +
4817          *                sub_auth(4 * 1(num_subauth)) + RID(4).
4818          */
4819         id_to_sid(from_kuid_munged(&init_user_ns, vfsuid_into_kuid(vfsuid)),
4820                   SIDUNIX_USER, (struct smb_sid *)&file_info->Sids[0]);
4821         id_to_sid(from_kgid_munged(&init_user_ns, vfsgid_into_kgid(vfsgid)),
4822                   SIDUNIX_GROUP, (struct smb_sid *)&file_info->Sids[16]);
4823
4824         rsp->OutputBufferLength = cpu_to_le32(out_buf_len);
4825 }
4826
4827 static int smb2_get_info_file(struct ksmbd_work *work,
4828                               struct smb2_query_info_req *req,
4829                               struct smb2_query_info_rsp *rsp)
4830 {
4831         struct ksmbd_file *fp;
4832         int fileinfoclass = 0;
4833         int rc = 0;
4834         unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
4835
4836         if (test_share_config_flag(work->tcon->share_conf,
4837                                    KSMBD_SHARE_FLAG_PIPE)) {
4838                 /* smb2 info file called for pipe */
4839                 return smb2_get_info_file_pipe(work->sess, req, rsp,
4840                                                work->response_buf);
4841         }
4842
4843         if (work->next_smb2_rcv_hdr_off) {
4844                 if (!has_file_id(req->VolatileFileId)) {
4845                         ksmbd_debug(SMB, "Compound request set FID = %llu\n",
4846                                     work->compound_fid);
4847                         id = work->compound_fid;
4848                         pid = work->compound_pfid;
4849                 }
4850         }
4851
4852         if (!has_file_id(id)) {
4853                 id = req->VolatileFileId;
4854                 pid = req->PersistentFileId;
4855         }
4856
4857         fp = ksmbd_lookup_fd_slow(work, id, pid);
4858         if (!fp)
4859                 return -ENOENT;
4860
4861         fileinfoclass = req->FileInfoClass;
4862
4863         switch (fileinfoclass) {
4864         case FILE_ACCESS_INFORMATION:
4865                 get_file_access_info(rsp, fp, work->response_buf);
4866                 break;
4867
4868         case FILE_BASIC_INFORMATION:
4869                 rc = get_file_basic_info(rsp, fp, work->response_buf);
4870                 break;
4871
4872         case FILE_STANDARD_INFORMATION:
4873                 get_file_standard_info(rsp, fp, work->response_buf);
4874                 break;
4875
4876         case FILE_ALIGNMENT_INFORMATION:
4877                 get_file_alignment_info(rsp, work->response_buf);
4878                 break;
4879
4880         case FILE_ALL_INFORMATION:
4881                 rc = get_file_all_info(work, rsp, fp, work->response_buf);
4882                 break;
4883
4884         case FILE_ALTERNATE_NAME_INFORMATION:
4885                 get_file_alternate_info(work, rsp, fp, work->response_buf);
4886                 break;
4887
4888         case FILE_STREAM_INFORMATION:
4889                 get_file_stream_info(work, rsp, fp, work->response_buf);
4890                 break;
4891
4892         case FILE_INTERNAL_INFORMATION:
4893                 get_file_internal_info(rsp, fp, work->response_buf);
4894                 break;
4895
4896         case FILE_NETWORK_OPEN_INFORMATION:
4897                 rc = get_file_network_open_info(rsp, fp, work->response_buf);
4898                 break;
4899
4900         case FILE_EA_INFORMATION:
4901                 get_file_ea_info(rsp, work->response_buf);
4902                 break;
4903
4904         case FILE_FULL_EA_INFORMATION:
4905                 rc = smb2_get_ea(work, fp, req, rsp, work->response_buf);
4906                 break;
4907
4908         case FILE_POSITION_INFORMATION:
4909                 get_file_position_info(rsp, fp, work->response_buf);
4910                 break;
4911
4912         case FILE_MODE_INFORMATION:
4913                 get_file_mode_info(rsp, fp, work->response_buf);
4914                 break;
4915
4916         case FILE_COMPRESSION_INFORMATION:
4917                 get_file_compression_info(rsp, fp, work->response_buf);
4918                 break;
4919
4920         case FILE_ATTRIBUTE_TAG_INFORMATION:
4921                 rc = get_file_attribute_tag_info(rsp, fp, work->response_buf);
4922                 break;
4923         case SMB_FIND_FILE_POSIX_INFO:
4924                 if (!work->tcon->posix_extensions) {
4925                         pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n");
4926                         rc = -EOPNOTSUPP;
4927                 } else {
4928                         find_file_posix_info(rsp, fp, work->response_buf);
4929                 }
4930                 break;
4931         default:
4932                 ksmbd_debug(SMB, "fileinfoclass %d not supported yet\n",
4933                             fileinfoclass);
4934                 rc = -EOPNOTSUPP;
4935         }
4936         if (!rc)
4937                 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
4938                                       rsp, work->response_buf);
4939         ksmbd_fd_put(work, fp);
4940         return rc;
4941 }
4942
4943 static int smb2_get_info_filesystem(struct ksmbd_work *work,
4944                                     struct smb2_query_info_req *req,
4945                                     struct smb2_query_info_rsp *rsp)
4946 {
4947         struct ksmbd_session *sess = work->sess;
4948         struct ksmbd_conn *conn = work->conn;
4949         struct ksmbd_share_config *share = work->tcon->share_conf;
4950         int fsinfoclass = 0;
4951         struct kstatfs stfs;
4952         struct path path;
4953         int rc = 0, len;
4954
4955         if (!share->path)
4956                 return -EIO;
4957
4958         rc = kern_path(share->path, LOOKUP_NO_SYMLINKS, &path);
4959         if (rc) {
4960                 pr_err("cannot create vfs path\n");
4961                 return -EIO;
4962         }
4963
4964         rc = vfs_statfs(&path, &stfs);
4965         if (rc) {
4966                 pr_err("cannot do stat of path %s\n", share->path);
4967                 path_put(&path);
4968                 return -EIO;
4969         }
4970
4971         fsinfoclass = req->FileInfoClass;
4972
4973         switch (fsinfoclass) {
4974         case FS_DEVICE_INFORMATION:
4975         {
4976                 struct filesystem_device_info *info;
4977
4978                 info = (struct filesystem_device_info *)rsp->Buffer;
4979
4980                 info->DeviceType = cpu_to_le32(stfs.f_type);
4981                 info->DeviceCharacteristics = cpu_to_le32(0x00000020);
4982                 rsp->OutputBufferLength = cpu_to_le32(8);
4983                 break;
4984         }
4985         case FS_ATTRIBUTE_INFORMATION:
4986         {
4987                 struct filesystem_attribute_info *info;
4988                 size_t sz;
4989
4990                 info = (struct filesystem_attribute_info *)rsp->Buffer;
4991                 info->Attributes = cpu_to_le32(FILE_SUPPORTS_OBJECT_IDS |
4992                                                FILE_PERSISTENT_ACLS |
4993                                                FILE_UNICODE_ON_DISK |
4994                                                FILE_CASE_PRESERVED_NAMES |
4995                                                FILE_CASE_SENSITIVE_SEARCH |
4996                                                FILE_SUPPORTS_BLOCK_REFCOUNTING);
4997
4998                 info->Attributes |= cpu_to_le32(server_conf.share_fake_fscaps);
4999
5000                 if (test_share_config_flag(work->tcon->share_conf,
5001                     KSMBD_SHARE_FLAG_STREAMS))
5002                         info->Attributes |= cpu_to_le32(FILE_NAMED_STREAMS);
5003
5004                 info->MaxPathNameComponentLength = cpu_to_le32(stfs.f_namelen);
5005                 len = smbConvertToUTF16((__le16 *)info->FileSystemName,
5006                                         "NTFS", PATH_MAX, conn->local_nls, 0);
5007                 len = len * 2;
5008                 info->FileSystemNameLen = cpu_to_le32(len);
5009                 sz = sizeof(struct filesystem_attribute_info) - 2 + len;
5010                 rsp->OutputBufferLength = cpu_to_le32(sz);
5011                 break;
5012         }
5013         case FS_VOLUME_INFORMATION:
5014         {
5015                 struct filesystem_vol_info *info;
5016                 size_t sz;
5017                 unsigned int serial_crc = 0;
5018
5019                 info = (struct filesystem_vol_info *)(rsp->Buffer);
5020                 info->VolumeCreationTime = 0;
5021                 serial_crc = crc32_le(serial_crc, share->name,
5022                                       strlen(share->name));
5023                 serial_crc = crc32_le(serial_crc, share->path,
5024                                       strlen(share->path));
5025                 serial_crc = crc32_le(serial_crc, ksmbd_netbios_name(),
5026                                       strlen(ksmbd_netbios_name()));
5027                 /* Taking dummy value of serial number*/
5028                 info->SerialNumber = cpu_to_le32(serial_crc);
5029                 len = smbConvertToUTF16((__le16 *)info->VolumeLabel,
5030                                         share->name, PATH_MAX,
5031                                         conn->local_nls, 0);
5032                 len = len * 2;
5033                 info->VolumeLabelSize = cpu_to_le32(len);
5034                 info->Reserved = 0;
5035                 sz = sizeof(struct filesystem_vol_info) - 2 + len;
5036                 rsp->OutputBufferLength = cpu_to_le32(sz);
5037                 break;
5038         }
5039         case FS_SIZE_INFORMATION:
5040         {
5041                 struct filesystem_info *info;
5042
5043                 info = (struct filesystem_info *)(rsp->Buffer);
5044                 info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks);
5045                 info->FreeAllocationUnits = cpu_to_le64(stfs.f_bfree);
5046                 info->SectorsPerAllocationUnit = cpu_to_le32(1);
5047                 info->BytesPerSector = cpu_to_le32(stfs.f_bsize);
5048                 rsp->OutputBufferLength = cpu_to_le32(24);
5049                 break;
5050         }
5051         case FS_FULL_SIZE_INFORMATION:
5052         {
5053                 struct smb2_fs_full_size_info *info;
5054
5055                 info = (struct smb2_fs_full_size_info *)(rsp->Buffer);
5056                 info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks);
5057                 info->CallerAvailableAllocationUnits =
5058                                         cpu_to_le64(stfs.f_bavail);
5059                 info->ActualAvailableAllocationUnits =
5060                                         cpu_to_le64(stfs.f_bfree);
5061                 info->SectorsPerAllocationUnit = cpu_to_le32(1);
5062                 info->BytesPerSector = cpu_to_le32(stfs.f_bsize);
5063                 rsp->OutputBufferLength = cpu_to_le32(32);
5064                 break;
5065         }
5066         case FS_OBJECT_ID_INFORMATION:
5067         {
5068                 struct object_id_info *info;
5069
5070                 info = (struct object_id_info *)(rsp->Buffer);
5071
5072                 if (!user_guest(sess->user))
5073                         memcpy(info->objid, user_passkey(sess->user), 16);
5074                 else
5075                         memset(info->objid, 0, 16);
5076
5077                 info->extended_info.magic = cpu_to_le32(EXTENDED_INFO_MAGIC);
5078                 info->extended_info.version = cpu_to_le32(1);
5079                 info->extended_info.release = cpu_to_le32(1);
5080                 info->extended_info.rel_date = 0;
5081                 memcpy(info->extended_info.version_string, "1.1.0", strlen("1.1.0"));
5082                 rsp->OutputBufferLength = cpu_to_le32(64);
5083                 break;
5084         }
5085         case FS_SECTOR_SIZE_INFORMATION:
5086         {
5087                 struct smb3_fs_ss_info *info;
5088                 unsigned int sector_size =
5089                         min_t(unsigned int, path.mnt->mnt_sb->s_blocksize, 4096);
5090
5091                 info = (struct smb3_fs_ss_info *)(rsp->Buffer);
5092
5093                 info->LogicalBytesPerSector = cpu_to_le32(sector_size);
5094                 info->PhysicalBytesPerSectorForAtomicity =
5095                                 cpu_to_le32(sector_size);
5096                 info->PhysicalBytesPerSectorForPerf = cpu_to_le32(sector_size);
5097                 info->FSEffPhysicalBytesPerSectorForAtomicity =
5098                                 cpu_to_le32(sector_size);
5099                 info->Flags = cpu_to_le32(SSINFO_FLAGS_ALIGNED_DEVICE |
5100                                     SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE);
5101                 info->ByteOffsetForSectorAlignment = 0;
5102                 info->ByteOffsetForPartitionAlignment = 0;
5103                 rsp->OutputBufferLength = cpu_to_le32(28);
5104                 break;
5105         }
5106         case FS_CONTROL_INFORMATION:
5107         {
5108                 /*
5109                  * TODO : The current implementation is based on
5110                  * test result with win7(NTFS) server. It's need to
5111                  * modify this to get valid Quota values
5112                  * from Linux kernel
5113                  */
5114                 struct smb2_fs_control_info *info;
5115
5116                 info = (struct smb2_fs_control_info *)(rsp->Buffer);
5117                 info->FreeSpaceStartFiltering = 0;
5118                 info->FreeSpaceThreshold = 0;
5119                 info->FreeSpaceStopFiltering = 0;
5120                 info->DefaultQuotaThreshold = cpu_to_le64(SMB2_NO_FID);
5121                 info->DefaultQuotaLimit = cpu_to_le64(SMB2_NO_FID);
5122                 info->Padding = 0;
5123                 rsp->OutputBufferLength = cpu_to_le32(48);
5124                 break;
5125         }
5126         case FS_POSIX_INFORMATION:
5127         {
5128                 struct filesystem_posix_info *info;
5129
5130                 if (!work->tcon->posix_extensions) {
5131                         pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n");
5132                         rc = -EOPNOTSUPP;
5133                 } else {
5134                         info = (struct filesystem_posix_info *)(rsp->Buffer);
5135                         info->OptimalTransferSize = cpu_to_le32(stfs.f_bsize);
5136                         info->BlockSize = cpu_to_le32(stfs.f_bsize);
5137                         info->TotalBlocks = cpu_to_le64(stfs.f_blocks);
5138                         info->BlocksAvail = cpu_to_le64(stfs.f_bfree);
5139                         info->UserBlocksAvail = cpu_to_le64(stfs.f_bavail);
5140                         info->TotalFileNodes = cpu_to_le64(stfs.f_files);
5141                         info->FreeFileNodes = cpu_to_le64(stfs.f_ffree);
5142                         rsp->OutputBufferLength = cpu_to_le32(56);
5143                 }
5144                 break;
5145         }
5146         default:
5147                 path_put(&path);
5148                 return -EOPNOTSUPP;
5149         }
5150         rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
5151                               rsp, work->response_buf);
5152         path_put(&path);
5153         return rc;
5154 }
5155
5156 static int smb2_get_info_sec(struct ksmbd_work *work,
5157                              struct smb2_query_info_req *req,
5158                              struct smb2_query_info_rsp *rsp)
5159 {
5160         struct ksmbd_file *fp;
5161         struct mnt_idmap *idmap;
5162         struct smb_ntsd *pntsd = (struct smb_ntsd *)rsp->Buffer, *ppntsd = NULL;
5163         struct smb_fattr fattr = {{0}};
5164         struct inode *inode;
5165         __u32 secdesclen = 0;
5166         unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
5167         int addition_info = le32_to_cpu(req->AdditionalInformation);
5168         int rc = 0, ppntsd_size = 0;
5169
5170         if (addition_info & ~(OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO |
5171                               PROTECTED_DACL_SECINFO |
5172                               UNPROTECTED_DACL_SECINFO)) {
5173                 ksmbd_debug(SMB, "Unsupported addition info: 0x%x)\n",
5174                        addition_info);
5175
5176                 pntsd->revision = cpu_to_le16(1);
5177                 pntsd->type = cpu_to_le16(SELF_RELATIVE | DACL_PROTECTED);
5178                 pntsd->osidoffset = 0;
5179                 pntsd->gsidoffset = 0;
5180                 pntsd->sacloffset = 0;
5181                 pntsd->dacloffset = 0;
5182
5183                 secdesclen = sizeof(struct smb_ntsd);
5184                 rsp->OutputBufferLength = cpu_to_le32(secdesclen);
5185
5186                 return 0;
5187         }
5188
5189         if (work->next_smb2_rcv_hdr_off) {
5190                 if (!has_file_id(req->VolatileFileId)) {
5191                         ksmbd_debug(SMB, "Compound request set FID = %llu\n",
5192                                     work->compound_fid);
5193                         id = work->compound_fid;
5194                         pid = work->compound_pfid;
5195                 }
5196         }
5197
5198         if (!has_file_id(id)) {
5199                 id = req->VolatileFileId;
5200                 pid = req->PersistentFileId;
5201         }
5202
5203         fp = ksmbd_lookup_fd_slow(work, id, pid);
5204         if (!fp)
5205                 return -ENOENT;
5206
5207         idmap = file_mnt_idmap(fp->filp);
5208         inode = file_inode(fp->filp);
5209         ksmbd_acls_fattr(&fattr, idmap, inode);
5210
5211         if (test_share_config_flag(work->tcon->share_conf,
5212                                    KSMBD_SHARE_FLAG_ACL_XATTR))
5213                 ppntsd_size = ksmbd_vfs_get_sd_xattr(work->conn, idmap,
5214                                                      fp->filp->f_path.dentry,
5215                                                      &ppntsd);
5216
5217         /* Check if sd buffer size exceeds response buffer size */
5218         if (smb2_resp_buf_len(work, 8) > ppntsd_size)
5219                 rc = build_sec_desc(idmap, pntsd, ppntsd, ppntsd_size,
5220                                     addition_info, &secdesclen, &fattr);
5221         posix_acl_release(fattr.cf_acls);
5222         posix_acl_release(fattr.cf_dacls);
5223         kfree(ppntsd);
5224         ksmbd_fd_put(work, fp);
5225         if (rc)
5226                 return rc;
5227
5228         rsp->OutputBufferLength = cpu_to_le32(secdesclen);
5229         return 0;
5230 }
5231
5232 /**
5233  * smb2_query_info() - handler for smb2 query info command
5234  * @work:       smb work containing query info request buffer
5235  *
5236  * Return:      0 on success, otherwise error
5237  */
5238 int smb2_query_info(struct ksmbd_work *work)
5239 {
5240         struct smb2_query_info_req *req;
5241         struct smb2_query_info_rsp *rsp;
5242         int rc = 0;
5243
5244         WORK_BUFFERS(work, req, rsp);
5245
5246         ksmbd_debug(SMB, "GOT query info request\n");
5247
5248         switch (req->InfoType) {
5249         case SMB2_O_INFO_FILE:
5250                 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n");
5251                 rc = smb2_get_info_file(work, req, rsp);
5252                 break;
5253         case SMB2_O_INFO_FILESYSTEM:
5254                 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILESYSTEM\n");
5255                 rc = smb2_get_info_filesystem(work, req, rsp);
5256                 break;
5257         case SMB2_O_INFO_SECURITY:
5258                 ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n");
5259                 rc = smb2_get_info_sec(work, req, rsp);
5260                 break;
5261         default:
5262                 ksmbd_debug(SMB, "InfoType %d not supported yet\n",
5263                             req->InfoType);
5264                 rc = -EOPNOTSUPP;
5265         }
5266
5267         if (!rc) {
5268                 rsp->StructureSize = cpu_to_le16(9);
5269                 rsp->OutputBufferOffset = cpu_to_le16(72);
5270                 rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
5271                                        offsetof(struct smb2_query_info_rsp, Buffer) +
5272                                         le32_to_cpu(rsp->OutputBufferLength));
5273         }
5274
5275         if (rc < 0) {
5276                 if (rc == -EACCES)
5277                         rsp->hdr.Status = STATUS_ACCESS_DENIED;
5278                 else if (rc == -ENOENT)
5279                         rsp->hdr.Status = STATUS_FILE_CLOSED;
5280                 else if (rc == -EIO)
5281                         rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
5282                 else if (rc == -ENOMEM)
5283                         rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
5284                 else if (rc == -EOPNOTSUPP || rsp->hdr.Status == 0)
5285                         rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
5286                 smb2_set_err_rsp(work);
5287
5288                 ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n",
5289                             rc);
5290                 return rc;
5291         }
5292         return 0;
5293 }
5294
5295 /**
5296  * smb2_close_pipe() - handler for closing IPC pipe
5297  * @work:       smb work containing close request buffer
5298  *
5299  * Return:      0
5300  */
5301 static noinline int smb2_close_pipe(struct ksmbd_work *work)
5302 {
5303         u64 id;
5304         struct smb2_close_req *req;
5305         struct smb2_close_rsp *rsp;
5306
5307         WORK_BUFFERS(work, req, rsp);
5308
5309         id = req->VolatileFileId;
5310         ksmbd_session_rpc_close(work->sess, id);
5311
5312         rsp->StructureSize = cpu_to_le16(60);
5313         rsp->Flags = 0;
5314         rsp->Reserved = 0;
5315         rsp->CreationTime = 0;
5316         rsp->LastAccessTime = 0;
5317         rsp->LastWriteTime = 0;
5318         rsp->ChangeTime = 0;
5319         rsp->AllocationSize = 0;
5320         rsp->EndOfFile = 0;
5321         rsp->Attributes = 0;
5322
5323         return ksmbd_iov_pin_rsp(work, (void *)rsp,
5324                                  sizeof(struct smb2_close_rsp));
5325 }
5326
5327 /**
5328  * smb2_close() - handler for smb2 close file command
5329  * @work:       smb work containing close request buffer
5330  *
5331  * Return:      0
5332  */
5333 int smb2_close(struct ksmbd_work *work)
5334 {
5335         u64 volatile_id = KSMBD_NO_FID;
5336         u64 sess_id;
5337         struct smb2_close_req *req;
5338         struct smb2_close_rsp *rsp;
5339         struct ksmbd_conn *conn = work->conn;
5340         struct ksmbd_file *fp;
5341         struct inode *inode;
5342         u64 time;
5343         int err = 0;
5344
5345         WORK_BUFFERS(work, req, rsp);
5346
5347         if (test_share_config_flag(work->tcon->share_conf,
5348                                    KSMBD_SHARE_FLAG_PIPE)) {
5349                 ksmbd_debug(SMB, "IPC pipe close request\n");
5350                 return smb2_close_pipe(work);
5351         }
5352
5353         sess_id = le64_to_cpu(req->hdr.SessionId);
5354         if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)
5355                 sess_id = work->compound_sid;
5356
5357         work->compound_sid = 0;
5358         if (check_session_id(conn, sess_id)) {
5359                 work->compound_sid = sess_id;
5360         } else {
5361                 rsp->hdr.Status = STATUS_USER_SESSION_DELETED;
5362                 if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)
5363                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
5364                 err = -EBADF;
5365                 goto out;
5366         }
5367
5368         if (work->next_smb2_rcv_hdr_off &&
5369             !has_file_id(req->VolatileFileId)) {
5370                 if (!has_file_id(work->compound_fid)) {
5371                         /* file already closed, return FILE_CLOSED */
5372                         ksmbd_debug(SMB, "file already closed\n");
5373                         rsp->hdr.Status = STATUS_FILE_CLOSED;
5374                         err = -EBADF;
5375                         goto out;
5376                 } else {
5377                         ksmbd_debug(SMB,
5378                                     "Compound request set FID = %llu:%llu\n",
5379                                     work->compound_fid,
5380                                     work->compound_pfid);
5381                         volatile_id = work->compound_fid;
5382
5383                         /* file closed, stored id is not valid anymore */
5384                         work->compound_fid = KSMBD_NO_FID;
5385                         work->compound_pfid = KSMBD_NO_FID;
5386                 }
5387         } else {
5388                 volatile_id = req->VolatileFileId;
5389         }
5390         ksmbd_debug(SMB, "volatile_id = %llu\n", volatile_id);
5391
5392         rsp->StructureSize = cpu_to_le16(60);
5393         rsp->Reserved = 0;
5394
5395         if (req->Flags == SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB) {
5396                 fp = ksmbd_lookup_fd_fast(work, volatile_id);
5397                 if (!fp) {
5398                         err = -ENOENT;
5399                         goto out;
5400                 }
5401
5402                 inode = file_inode(fp->filp);
5403                 rsp->Flags = SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB;
5404                 rsp->AllocationSize = S_ISDIR(inode->i_mode) ? 0 :
5405                         cpu_to_le64(inode->i_blocks << 9);
5406                 rsp->EndOfFile = cpu_to_le64(inode->i_size);
5407                 rsp->Attributes = fp->f_ci->m_fattr;
5408                 rsp->CreationTime = cpu_to_le64(fp->create_time);
5409                 time = ksmbd_UnixTimeToNT(inode->i_atime);
5410                 rsp->LastAccessTime = cpu_to_le64(time);
5411                 time = ksmbd_UnixTimeToNT(inode->i_mtime);
5412                 rsp->LastWriteTime = cpu_to_le64(time);
5413                 time = ksmbd_UnixTimeToNT(inode_get_ctime(inode));
5414                 rsp->ChangeTime = cpu_to_le64(time);
5415                 ksmbd_fd_put(work, fp);
5416         } else {
5417                 rsp->Flags = 0;
5418                 rsp->AllocationSize = 0;
5419                 rsp->EndOfFile = 0;
5420                 rsp->Attributes = 0;
5421                 rsp->CreationTime = 0;
5422                 rsp->LastAccessTime = 0;
5423                 rsp->LastWriteTime = 0;
5424                 rsp->ChangeTime = 0;
5425         }
5426
5427         err = ksmbd_close_fd(work, volatile_id);
5428 out:
5429         if (!err)
5430                 err = ksmbd_iov_pin_rsp(work, (void *)rsp,
5431                                         sizeof(struct smb2_close_rsp));
5432
5433         if (err) {
5434                 if (rsp->hdr.Status == 0)
5435                         rsp->hdr.Status = STATUS_FILE_CLOSED;
5436                 smb2_set_err_rsp(work);
5437         }
5438
5439         return err;
5440 }
5441
5442 /**
5443  * smb2_echo() - handler for smb2 echo(ping) command
5444  * @work:       smb work containing echo request buffer
5445  *
5446  * Return:      0
5447  */
5448 int smb2_echo(struct ksmbd_work *work)
5449 {
5450         struct smb2_echo_rsp *rsp = smb2_get_msg(work->response_buf);
5451
5452         if (work->next_smb2_rcv_hdr_off)
5453                 rsp = ksmbd_resp_buf_next(work);
5454
5455         rsp->StructureSize = cpu_to_le16(4);
5456         rsp->Reserved = 0;
5457         return ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_echo_rsp));
5458 }
5459
5460 static int smb2_rename(struct ksmbd_work *work,
5461                        struct ksmbd_file *fp,
5462                        struct smb2_file_rename_info *file_info,
5463                        struct nls_table *local_nls)
5464 {
5465         struct ksmbd_share_config *share = fp->tcon->share_conf;
5466         char *new_name = NULL;
5467         int rc, flags = 0;
5468
5469         ksmbd_debug(SMB, "setting FILE_RENAME_INFO\n");
5470         new_name = smb2_get_name(file_info->FileName,
5471                                  le32_to_cpu(file_info->FileNameLength),
5472                                  local_nls);
5473         if (IS_ERR(new_name))
5474                 return PTR_ERR(new_name);
5475
5476         if (strchr(new_name, ':')) {
5477                 int s_type;
5478                 char *xattr_stream_name, *stream_name = NULL;
5479                 size_t xattr_stream_size;
5480                 int len;
5481
5482                 rc = parse_stream_name(new_name, &stream_name, &s_type);
5483                 if (rc < 0)
5484                         goto out;
5485
5486                 len = strlen(new_name);
5487                 if (len > 0 && new_name[len - 1] != '/') {
5488                         pr_err("not allow base filename in rename\n");
5489                         rc = -ESHARE;
5490                         goto out;
5491                 }
5492
5493                 rc = ksmbd_vfs_xattr_stream_name(stream_name,
5494                                                  &xattr_stream_name,
5495                                                  &xattr_stream_size,
5496                                                  s_type);
5497                 if (rc)
5498                         goto out;
5499
5500                 rc = ksmbd_vfs_setxattr(file_mnt_idmap(fp->filp),
5501                                         &fp->filp->f_path,
5502                                         xattr_stream_name,
5503                                         NULL, 0, 0);
5504                 if (rc < 0) {
5505                         pr_err("failed to store stream name in xattr: %d\n",
5506                                rc);
5507                         rc = -EINVAL;
5508                         goto out;
5509                 }
5510
5511                 goto out;
5512         }
5513
5514         ksmbd_debug(SMB, "new name %s\n", new_name);
5515         if (ksmbd_share_veto_filename(share, new_name)) {
5516                 rc = -ENOENT;
5517                 ksmbd_debug(SMB, "Can't rename vetoed file: %s\n", new_name);
5518                 goto out;
5519         }
5520
5521         if (!file_info->ReplaceIfExists)
5522                 flags = RENAME_NOREPLACE;
5523
5524         rc = ksmbd_vfs_rename(work, &fp->filp->f_path, new_name, flags);
5525 out:
5526         kfree(new_name);
5527         return rc;
5528 }
5529
5530 static int smb2_create_link(struct ksmbd_work *work,
5531                             struct ksmbd_share_config *share,
5532                             struct smb2_file_link_info *file_info,
5533                             unsigned int buf_len, struct file *filp,
5534                             struct nls_table *local_nls)
5535 {
5536         char *link_name = NULL, *target_name = NULL, *pathname = NULL;
5537         struct path path, parent_path;
5538         bool file_present = false;
5539         int rc;
5540
5541         if (buf_len < (u64)sizeof(struct smb2_file_link_info) +
5542                         le32_to_cpu(file_info->FileNameLength))
5543                 return -EINVAL;
5544
5545         ksmbd_debug(SMB, "setting FILE_LINK_INFORMATION\n");
5546         pathname = kmalloc(PATH_MAX, GFP_KERNEL);
5547         if (!pathname)
5548                 return -ENOMEM;
5549
5550         link_name = smb2_get_name(file_info->FileName,
5551                                   le32_to_cpu(file_info->FileNameLength),
5552                                   local_nls);
5553         if (IS_ERR(link_name) || S_ISDIR(file_inode(filp)->i_mode)) {
5554                 rc = -EINVAL;
5555                 goto out;
5556         }
5557
5558         ksmbd_debug(SMB, "link name is %s\n", link_name);
5559         target_name = file_path(filp, pathname, PATH_MAX);
5560         if (IS_ERR(target_name)) {
5561                 rc = -EINVAL;
5562                 goto out;
5563         }
5564
5565         ksmbd_debug(SMB, "target name is %s\n", target_name);
5566         rc = ksmbd_vfs_kern_path_locked(work, link_name, LOOKUP_NO_SYMLINKS,
5567                                         &parent_path, &path, 0);
5568         if (rc) {
5569                 if (rc != -ENOENT)
5570                         goto out;
5571         } else
5572                 file_present = true;
5573
5574         if (file_info->ReplaceIfExists) {
5575                 if (file_present) {
5576                         rc = ksmbd_vfs_remove_file(work, &path);
5577                         if (rc) {
5578                                 rc = -EINVAL;
5579                                 ksmbd_debug(SMB, "cannot delete %s\n",
5580                                             link_name);
5581                                 goto out;
5582                         }
5583                 }
5584         } else {
5585                 if (file_present) {
5586                         rc = -EEXIST;
5587                         ksmbd_debug(SMB, "link already exists\n");
5588                         goto out;
5589                 }
5590         }
5591
5592         rc = ksmbd_vfs_link(work, target_name, link_name);
5593         if (rc)
5594                 rc = -EINVAL;
5595 out:
5596         if (file_present) {
5597                 inode_unlock(d_inode(parent_path.dentry));
5598                 path_put(&path);
5599                 path_put(&parent_path);
5600         }
5601         if (!IS_ERR(link_name))
5602                 kfree(link_name);
5603         kfree(pathname);
5604         return rc;
5605 }
5606
5607 static int set_file_basic_info(struct ksmbd_file *fp,
5608                                struct smb2_file_basic_info *file_info,
5609                                struct ksmbd_share_config *share)
5610 {
5611         struct iattr attrs;
5612         struct file *filp;
5613         struct inode *inode;
5614         struct mnt_idmap *idmap;
5615         int rc = 0;
5616
5617         if (!(fp->daccess & FILE_WRITE_ATTRIBUTES_LE))
5618                 return -EACCES;
5619
5620         attrs.ia_valid = 0;
5621         filp = fp->filp;
5622         inode = file_inode(filp);
5623         idmap = file_mnt_idmap(filp);
5624
5625         if (file_info->CreationTime)
5626                 fp->create_time = le64_to_cpu(file_info->CreationTime);
5627
5628         if (file_info->LastAccessTime) {
5629                 attrs.ia_atime = ksmbd_NTtimeToUnix(file_info->LastAccessTime);
5630                 attrs.ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
5631         }
5632
5633         attrs.ia_valid |= ATTR_CTIME;
5634         if (file_info->ChangeTime)
5635                 attrs.ia_ctime = ksmbd_NTtimeToUnix(file_info->ChangeTime);
5636         else
5637                 attrs.ia_ctime = inode_get_ctime(inode);
5638
5639         if (file_info->LastWriteTime) {
5640                 attrs.ia_mtime = ksmbd_NTtimeToUnix(file_info->LastWriteTime);
5641                 attrs.ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
5642         }
5643
5644         if (file_info->Attributes) {
5645                 if (!S_ISDIR(inode->i_mode) &&
5646                     file_info->Attributes & FILE_ATTRIBUTE_DIRECTORY_LE) {
5647                         pr_err("can't change a file to a directory\n");
5648                         return -EINVAL;
5649                 }
5650
5651                 if (!(S_ISDIR(inode->i_mode) && file_info->Attributes == FILE_ATTRIBUTE_NORMAL_LE))
5652                         fp->f_ci->m_fattr = file_info->Attributes |
5653                                 (fp->f_ci->m_fattr & FILE_ATTRIBUTE_DIRECTORY_LE);
5654         }
5655
5656         if (test_share_config_flag(share, KSMBD_SHARE_FLAG_STORE_DOS_ATTRS) &&
5657             (file_info->CreationTime || file_info->Attributes)) {
5658                 struct xattr_dos_attrib da = {0};
5659
5660                 da.version = 4;
5661                 da.itime = fp->itime;
5662                 da.create_time = fp->create_time;
5663                 da.attr = le32_to_cpu(fp->f_ci->m_fattr);
5664                 da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME |
5665                         XATTR_DOSINFO_ITIME;
5666
5667                 rc = ksmbd_vfs_set_dos_attrib_xattr(idmap, &filp->f_path, &da);
5668                 if (rc)
5669                         ksmbd_debug(SMB,
5670                                     "failed to restore file attribute in EA\n");
5671                 rc = 0;
5672         }
5673
5674         if (attrs.ia_valid) {
5675                 struct dentry *dentry = filp->f_path.dentry;
5676                 struct inode *inode = d_inode(dentry);
5677
5678                 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
5679                         return -EACCES;
5680
5681                 inode_lock(inode);
5682                 inode_set_ctime_to_ts(inode, attrs.ia_ctime);
5683                 attrs.ia_valid &= ~ATTR_CTIME;
5684                 rc = notify_change(idmap, dentry, &attrs, NULL);
5685                 inode_unlock(inode);
5686         }
5687         return rc;
5688 }
5689
5690 static int set_file_allocation_info(struct ksmbd_work *work,
5691                                     struct ksmbd_file *fp,
5692                                     struct smb2_file_alloc_info *file_alloc_info)
5693 {
5694         /*
5695          * TODO : It's working fine only when store dos attributes
5696          * is not yes. need to implement a logic which works
5697          * properly with any smb.conf option
5698          */
5699
5700         loff_t alloc_blks;
5701         struct inode *inode;
5702         int rc;
5703
5704         if (!(fp->daccess & FILE_WRITE_DATA_LE))
5705                 return -EACCES;
5706
5707         alloc_blks = (le64_to_cpu(file_alloc_info->AllocationSize) + 511) >> 9;
5708         inode = file_inode(fp->filp);
5709
5710         if (alloc_blks > inode->i_blocks) {
5711                 smb_break_all_levII_oplock(work, fp, 1);
5712                 rc = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0,
5713                                    alloc_blks * 512);
5714                 if (rc && rc != -EOPNOTSUPP) {
5715                         pr_err("vfs_fallocate is failed : %d\n", rc);
5716                         return rc;
5717                 }
5718         } else if (alloc_blks < inode->i_blocks) {
5719                 loff_t size;
5720
5721                 /*
5722                  * Allocation size could be smaller than original one
5723                  * which means allocated blocks in file should be
5724                  * deallocated. use truncate to cut out it, but inode
5725                  * size is also updated with truncate offset.
5726                  * inode size is retained by backup inode size.
5727                  */
5728                 size = i_size_read(inode);
5729                 rc = ksmbd_vfs_truncate(work, fp, alloc_blks * 512);
5730                 if (rc) {
5731                         pr_err("truncate failed!, err %d\n", rc);
5732                         return rc;
5733                 }
5734                 if (size < alloc_blks * 512)
5735                         i_size_write(inode, size);
5736         }
5737         return 0;
5738 }
5739
5740 static int set_end_of_file_info(struct ksmbd_work *work, struct ksmbd_file *fp,
5741                                 struct smb2_file_eof_info *file_eof_info)
5742 {
5743         loff_t newsize;
5744         struct inode *inode;
5745         int rc;
5746
5747         if (!(fp->daccess & FILE_WRITE_DATA_LE))
5748                 return -EACCES;
5749
5750         newsize = le64_to_cpu(file_eof_info->EndOfFile);
5751         inode = file_inode(fp->filp);
5752
5753         /*
5754          * If FILE_END_OF_FILE_INFORMATION of set_info_file is called
5755          * on FAT32 shared device, truncate execution time is too long
5756          * and network error could cause from windows client. because
5757          * truncate of some filesystem like FAT32 fill zero data in
5758          * truncated range.
5759          */
5760         if (inode->i_sb->s_magic != MSDOS_SUPER_MAGIC) {
5761                 ksmbd_debug(SMB, "truncated to newsize %lld\n", newsize);
5762                 rc = ksmbd_vfs_truncate(work, fp, newsize);
5763                 if (rc) {
5764                         ksmbd_debug(SMB, "truncate failed!, err %d\n", rc);
5765                         if (rc != -EAGAIN)
5766                                 rc = -EBADF;
5767                         return rc;
5768                 }
5769         }
5770         return 0;
5771 }
5772
5773 static int set_rename_info(struct ksmbd_work *work, struct ksmbd_file *fp,
5774                            struct smb2_file_rename_info *rename_info,
5775                            unsigned int buf_len)
5776 {
5777         if (!(fp->daccess & FILE_DELETE_LE)) {
5778                 pr_err("no right to delete : 0x%x\n", fp->daccess);
5779                 return -EACCES;
5780         }
5781
5782         if (buf_len < (u64)sizeof(struct smb2_file_rename_info) +
5783                         le32_to_cpu(rename_info->FileNameLength))
5784                 return -EINVAL;
5785
5786         if (!le32_to_cpu(rename_info->FileNameLength))
5787                 return -EINVAL;
5788
5789         return smb2_rename(work, fp, rename_info, work->conn->local_nls);
5790 }
5791
5792 static int set_file_disposition_info(struct ksmbd_file *fp,
5793                                      struct smb2_file_disposition_info *file_info)
5794 {
5795         struct inode *inode;
5796
5797         if (!(fp->daccess & FILE_DELETE_LE)) {
5798                 pr_err("no right to delete : 0x%x\n", fp->daccess);
5799                 return -EACCES;
5800         }
5801
5802         inode = file_inode(fp->filp);
5803         if (file_info->DeletePending) {
5804                 if (S_ISDIR(inode->i_mode) &&
5805                     ksmbd_vfs_empty_dir(fp) == -ENOTEMPTY)
5806                         return -EBUSY;
5807                 ksmbd_set_inode_pending_delete(fp);
5808         } else {
5809                 ksmbd_clear_inode_pending_delete(fp);
5810         }
5811         return 0;
5812 }
5813
5814 static int set_file_position_info(struct ksmbd_file *fp,
5815                                   struct smb2_file_pos_info *file_info)
5816 {
5817         loff_t current_byte_offset;
5818         unsigned long sector_size;
5819         struct inode *inode;
5820
5821         inode = file_inode(fp->filp);
5822         current_byte_offset = le64_to_cpu(file_info->CurrentByteOffset);
5823         sector_size = inode->i_sb->s_blocksize;
5824
5825         if (current_byte_offset < 0 ||
5826             (fp->coption == FILE_NO_INTERMEDIATE_BUFFERING_LE &&
5827              current_byte_offset & (sector_size - 1))) {
5828                 pr_err("CurrentByteOffset is not valid : %llu\n",
5829                        current_byte_offset);
5830                 return -EINVAL;
5831         }
5832
5833         fp->filp->f_pos = current_byte_offset;
5834         return 0;
5835 }
5836
5837 static int set_file_mode_info(struct ksmbd_file *fp,
5838                               struct smb2_file_mode_info *file_info)
5839 {
5840         __le32 mode;
5841
5842         mode = file_info->Mode;
5843
5844         if ((mode & ~FILE_MODE_INFO_MASK)) {
5845                 pr_err("Mode is not valid : 0x%x\n", le32_to_cpu(mode));
5846                 return -EINVAL;
5847         }
5848
5849         /*
5850          * TODO : need to implement consideration for
5851          * FILE_SYNCHRONOUS_IO_ALERT and FILE_SYNCHRONOUS_IO_NONALERT
5852          */
5853         ksmbd_vfs_set_fadvise(fp->filp, mode);
5854         fp->coption = mode;
5855         return 0;
5856 }
5857
5858 /**
5859  * smb2_set_info_file() - handler for smb2 set info command
5860  * @work:       smb work containing set info command buffer
5861  * @fp:         ksmbd_file pointer
5862  * @req:        request buffer pointer
5863  * @share:      ksmbd_share_config pointer
5864  *
5865  * Return:      0 on success, otherwise error
5866  * TODO: need to implement an error handling for STATUS_INFO_LENGTH_MISMATCH
5867  */
5868 static int smb2_set_info_file(struct ksmbd_work *work, struct ksmbd_file *fp,
5869                               struct smb2_set_info_req *req,
5870                               struct ksmbd_share_config *share)
5871 {
5872         unsigned int buf_len = le32_to_cpu(req->BufferLength);
5873
5874         switch (req->FileInfoClass) {
5875         case FILE_BASIC_INFORMATION:
5876         {
5877                 if (buf_len < sizeof(struct smb2_file_basic_info))
5878                         return -EINVAL;
5879
5880                 return set_file_basic_info(fp, (struct smb2_file_basic_info *)req->Buffer, share);
5881         }
5882         case FILE_ALLOCATION_INFORMATION:
5883         {
5884                 if (buf_len < sizeof(struct smb2_file_alloc_info))
5885                         return -EINVAL;
5886
5887                 return set_file_allocation_info(work, fp,
5888                                                 (struct smb2_file_alloc_info *)req->Buffer);
5889         }
5890         case FILE_END_OF_FILE_INFORMATION:
5891         {
5892                 if (buf_len < sizeof(struct smb2_file_eof_info))
5893                         return -EINVAL;
5894
5895                 return set_end_of_file_info(work, fp,
5896                                             (struct smb2_file_eof_info *)req->Buffer);
5897         }
5898         case FILE_RENAME_INFORMATION:
5899         {
5900                 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
5901                         ksmbd_debug(SMB,
5902                                     "User does not have write permission\n");
5903                         return -EACCES;
5904                 }
5905
5906                 if (buf_len < sizeof(struct smb2_file_rename_info))
5907                         return -EINVAL;
5908
5909                 return set_rename_info(work, fp,
5910                                        (struct smb2_file_rename_info *)req->Buffer,
5911                                        buf_len);
5912         }
5913         case FILE_LINK_INFORMATION:
5914         {
5915                 if (buf_len < sizeof(struct smb2_file_link_info))
5916                         return -EINVAL;
5917
5918                 return smb2_create_link(work, work->tcon->share_conf,
5919                                         (struct smb2_file_link_info *)req->Buffer,
5920                                         buf_len, fp->filp,
5921                                         work->conn->local_nls);
5922         }
5923         case FILE_DISPOSITION_INFORMATION:
5924         {
5925                 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
5926                         ksmbd_debug(SMB,
5927                                     "User does not have write permission\n");
5928                         return -EACCES;
5929                 }
5930
5931                 if (buf_len < sizeof(struct smb2_file_disposition_info))
5932                         return -EINVAL;
5933
5934                 return set_file_disposition_info(fp,
5935                                                  (struct smb2_file_disposition_info *)req->Buffer);
5936         }
5937         case FILE_FULL_EA_INFORMATION:
5938         {
5939                 if (!(fp->daccess & FILE_WRITE_EA_LE)) {
5940                         pr_err("Not permitted to write ext  attr: 0x%x\n",
5941                                fp->daccess);
5942                         return -EACCES;
5943                 }
5944
5945                 if (buf_len < sizeof(struct smb2_ea_info))
5946                         return -EINVAL;
5947
5948                 return smb2_set_ea((struct smb2_ea_info *)req->Buffer,
5949                                    buf_len, &fp->filp->f_path);
5950         }
5951         case FILE_POSITION_INFORMATION:
5952         {
5953                 if (buf_len < sizeof(struct smb2_file_pos_info))
5954                         return -EINVAL;
5955
5956                 return set_file_position_info(fp, (struct smb2_file_pos_info *)req->Buffer);
5957         }
5958         case FILE_MODE_INFORMATION:
5959         {
5960                 if (buf_len < sizeof(struct smb2_file_mode_info))
5961                         return -EINVAL;
5962
5963                 return set_file_mode_info(fp, (struct smb2_file_mode_info *)req->Buffer);
5964         }
5965         }
5966
5967         pr_err("Unimplemented Fileinfoclass :%d\n", req->FileInfoClass);
5968         return -EOPNOTSUPP;
5969 }
5970
5971 static int smb2_set_info_sec(struct ksmbd_file *fp, int addition_info,
5972                              char *buffer, int buf_len)
5973 {
5974         struct smb_ntsd *pntsd = (struct smb_ntsd *)buffer;
5975
5976         fp->saccess |= FILE_SHARE_DELETE_LE;
5977
5978         return set_info_sec(fp->conn, fp->tcon, &fp->filp->f_path, pntsd,
5979                         buf_len, false);
5980 }
5981
5982 /**
5983  * smb2_set_info() - handler for smb2 set info command handler
5984  * @work:       smb work containing set info request buffer
5985  *
5986  * Return:      0 on success, otherwise error
5987  */
5988 int smb2_set_info(struct ksmbd_work *work)
5989 {
5990         struct smb2_set_info_req *req;
5991         struct smb2_set_info_rsp *rsp;
5992         struct ksmbd_file *fp;
5993         int rc = 0;
5994         unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
5995
5996         ksmbd_debug(SMB, "Received set info request\n");
5997
5998         if (work->next_smb2_rcv_hdr_off) {
5999                 req = ksmbd_req_buf_next(work);
6000                 rsp = ksmbd_resp_buf_next(work);
6001                 if (!has_file_id(req->VolatileFileId)) {
6002                         ksmbd_debug(SMB, "Compound request set FID = %llu\n",
6003                                     work->compound_fid);
6004                         id = work->compound_fid;
6005                         pid = work->compound_pfid;
6006                 }
6007         } else {
6008                 req = smb2_get_msg(work->request_buf);
6009                 rsp = smb2_get_msg(work->response_buf);
6010         }
6011
6012         if (!has_file_id(id)) {
6013                 id = req->VolatileFileId;
6014                 pid = req->PersistentFileId;
6015         }
6016
6017         fp = ksmbd_lookup_fd_slow(work, id, pid);
6018         if (!fp) {
6019                 ksmbd_debug(SMB, "Invalid id for close: %u\n", id);
6020                 rc = -ENOENT;
6021                 goto err_out;
6022         }
6023
6024         switch (req->InfoType) {
6025         case SMB2_O_INFO_FILE:
6026                 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n");
6027                 rc = smb2_set_info_file(work, fp, req, work->tcon->share_conf);
6028                 break;
6029         case SMB2_O_INFO_SECURITY:
6030                 ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n");
6031                 if (ksmbd_override_fsids(work)) {
6032                         rc = -ENOMEM;
6033                         goto err_out;
6034                 }
6035                 rc = smb2_set_info_sec(fp,
6036                                        le32_to_cpu(req->AdditionalInformation),
6037                                        req->Buffer,
6038                                        le32_to_cpu(req->BufferLength));
6039                 ksmbd_revert_fsids(work);
6040                 break;
6041         default:
6042                 rc = -EOPNOTSUPP;
6043         }
6044
6045         if (rc < 0)
6046                 goto err_out;
6047
6048         rsp->StructureSize = cpu_to_le16(2);
6049         rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
6050                                sizeof(struct smb2_set_info_rsp));
6051         if (rc)
6052                 goto err_out;
6053         ksmbd_fd_put(work, fp);
6054         return 0;
6055
6056 err_out:
6057         if (rc == -EACCES || rc == -EPERM || rc == -EXDEV)
6058                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
6059         else if (rc == -EINVAL)
6060                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6061         else if (rc == -ESHARE)
6062                 rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6063         else if (rc == -ENOENT)
6064                 rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID;
6065         else if (rc == -EBUSY || rc == -ENOTEMPTY)
6066                 rsp->hdr.Status = STATUS_DIRECTORY_NOT_EMPTY;
6067         else if (rc == -EAGAIN)
6068                 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6069         else if (rc == -EBADF || rc == -ESTALE)
6070                 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6071         else if (rc == -EEXIST)
6072                 rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION;
6073         else if (rsp->hdr.Status == 0 || rc == -EOPNOTSUPP)
6074                 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
6075         smb2_set_err_rsp(work);
6076         ksmbd_fd_put(work, fp);
6077         ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n", rc);
6078         return rc;
6079 }
6080
6081 /**
6082  * smb2_read_pipe() - handler for smb2 read from IPC pipe
6083  * @work:       smb work containing read IPC pipe command buffer
6084  *
6085  * Return:      0 on success, otherwise error
6086  */
6087 static noinline int smb2_read_pipe(struct ksmbd_work *work)
6088 {
6089         int nbytes = 0, err;
6090         u64 id;
6091         struct ksmbd_rpc_command *rpc_resp;
6092         struct smb2_read_req *req;
6093         struct smb2_read_rsp *rsp;
6094
6095         WORK_BUFFERS(work, req, rsp);
6096
6097         id = req->VolatileFileId;
6098
6099         rpc_resp = ksmbd_rpc_read(work->sess, id);
6100         if (rpc_resp) {
6101                 void *aux_payload_buf;
6102
6103                 if (rpc_resp->flags != KSMBD_RPC_OK) {
6104                         err = -EINVAL;
6105                         goto out;
6106                 }
6107
6108                 aux_payload_buf =
6109                         kvmalloc(rpc_resp->payload_sz, GFP_KERNEL);
6110                 if (!aux_payload_buf) {
6111                         err = -ENOMEM;
6112                         goto out;
6113                 }
6114
6115                 memcpy(aux_payload_buf, rpc_resp->payload, rpc_resp->payload_sz);
6116
6117                 nbytes = rpc_resp->payload_sz;
6118                 kvfree(rpc_resp);
6119                 err = ksmbd_iov_pin_rsp_read(work, (void *)rsp,
6120                                              offsetof(struct smb2_read_rsp, Buffer),
6121                                              aux_payload_buf, nbytes);
6122                 if (err)
6123                         goto out;
6124         } else {
6125                 err = ksmbd_iov_pin_rsp(work, (void *)rsp,
6126                                         offsetof(struct smb2_read_rsp, Buffer));
6127                 if (err)
6128                         goto out;
6129         }
6130
6131         rsp->StructureSize = cpu_to_le16(17);
6132         rsp->DataOffset = 80;
6133         rsp->Reserved = 0;
6134         rsp->DataLength = cpu_to_le32(nbytes);
6135         rsp->DataRemaining = 0;
6136         rsp->Flags = 0;
6137         return 0;
6138
6139 out:
6140         rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
6141         smb2_set_err_rsp(work);
6142         kvfree(rpc_resp);
6143         return err;
6144 }
6145
6146 static int smb2_set_remote_key_for_rdma(struct ksmbd_work *work,
6147                                         struct smb2_buffer_desc_v1 *desc,
6148                                         __le32 Channel,
6149                                         __le16 ChannelInfoLength)
6150 {
6151         unsigned int i, ch_count;
6152
6153         if (work->conn->dialect == SMB30_PROT_ID &&
6154             Channel != SMB2_CHANNEL_RDMA_V1)
6155                 return -EINVAL;
6156
6157         ch_count = le16_to_cpu(ChannelInfoLength) / sizeof(*desc);
6158         if (ksmbd_debug_types & KSMBD_DEBUG_RDMA) {
6159                 for (i = 0; i < ch_count; i++) {
6160                         pr_info("RDMA r/w request %#x: token %#x, length %#x\n",
6161                                 i,
6162                                 le32_to_cpu(desc[i].token),
6163                                 le32_to_cpu(desc[i].length));
6164                 }
6165         }
6166         if (!ch_count)
6167                 return -EINVAL;
6168
6169         work->need_invalidate_rkey =
6170                 (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE);
6171         if (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE)
6172                 work->remote_key = le32_to_cpu(desc->token);
6173         return 0;
6174 }
6175
6176 static ssize_t smb2_read_rdma_channel(struct ksmbd_work *work,
6177                                       struct smb2_read_req *req, void *data_buf,
6178                                       size_t length)
6179 {
6180         int err;
6181
6182         err = ksmbd_conn_rdma_write(work->conn, data_buf, length,
6183                                     (struct smb2_buffer_desc_v1 *)
6184                                     ((char *)req + le16_to_cpu(req->ReadChannelInfoOffset)),
6185                                     le16_to_cpu(req->ReadChannelInfoLength));
6186         if (err)
6187                 return err;
6188
6189         return length;
6190 }
6191
6192 /**
6193  * smb2_read() - handler for smb2 read from file
6194  * @work:       smb work containing read command buffer
6195  *
6196  * Return:      0 on success, otherwise error
6197  */
6198 int smb2_read(struct ksmbd_work *work)
6199 {
6200         struct ksmbd_conn *conn = work->conn;
6201         struct smb2_read_req *req;
6202         struct smb2_read_rsp *rsp;
6203         struct ksmbd_file *fp = NULL;
6204         loff_t offset;
6205         size_t length, mincount;
6206         ssize_t nbytes = 0, remain_bytes = 0;
6207         int err = 0;
6208         bool is_rdma_channel = false;
6209         unsigned int max_read_size = conn->vals->max_read_size;
6210         unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
6211         void *aux_payload_buf;
6212
6213         if (test_share_config_flag(work->tcon->share_conf,
6214                                    KSMBD_SHARE_FLAG_PIPE)) {
6215                 ksmbd_debug(SMB, "IPC pipe read request\n");
6216                 return smb2_read_pipe(work);
6217         }
6218
6219         if (work->next_smb2_rcv_hdr_off) {
6220                 req = ksmbd_req_buf_next(work);
6221                 rsp = ksmbd_resp_buf_next(work);
6222                 if (!has_file_id(req->VolatileFileId)) {
6223                         ksmbd_debug(SMB, "Compound request set FID = %llu\n",
6224                                         work->compound_fid);
6225                         id = work->compound_fid;
6226                         pid = work->compound_pfid;
6227                 }
6228         } else {
6229                 req = smb2_get_msg(work->request_buf);
6230                 rsp = smb2_get_msg(work->response_buf);
6231         }
6232
6233         if (!has_file_id(id)) {
6234                 id = req->VolatileFileId;
6235                 pid = req->PersistentFileId;
6236         }
6237
6238         if (req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE ||
6239             req->Channel == SMB2_CHANNEL_RDMA_V1) {
6240                 is_rdma_channel = true;
6241                 max_read_size = get_smbd_max_read_write_size();
6242         }
6243
6244         if (is_rdma_channel == true) {
6245                 unsigned int ch_offset = le16_to_cpu(req->ReadChannelInfoOffset);
6246
6247                 if (ch_offset < offsetof(struct smb2_read_req, Buffer)) {
6248                         err = -EINVAL;
6249                         goto out;
6250                 }
6251                 err = smb2_set_remote_key_for_rdma(work,
6252                                                    (struct smb2_buffer_desc_v1 *)
6253                                                    ((char *)req + ch_offset),
6254                                                    req->Channel,
6255                                                    req->ReadChannelInfoLength);
6256                 if (err)
6257                         goto out;
6258         }
6259
6260         fp = ksmbd_lookup_fd_slow(work, id, pid);
6261         if (!fp) {
6262                 err = -ENOENT;
6263                 goto out;
6264         }
6265
6266         if (!(fp->daccess & (FILE_READ_DATA_LE | FILE_READ_ATTRIBUTES_LE))) {
6267                 pr_err("Not permitted to read : 0x%x\n", fp->daccess);
6268                 err = -EACCES;
6269                 goto out;
6270         }
6271
6272         offset = le64_to_cpu(req->Offset);
6273         length = le32_to_cpu(req->Length);
6274         mincount = le32_to_cpu(req->MinimumCount);
6275
6276         if (length > max_read_size) {
6277                 ksmbd_debug(SMB, "limiting read size to max size(%u)\n",
6278                             max_read_size);
6279                 err = -EINVAL;
6280                 goto out;
6281         }
6282
6283         ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n",
6284                     fp->filp, offset, length);
6285
6286         aux_payload_buf = kvzalloc(length, GFP_KERNEL);
6287         if (!aux_payload_buf) {
6288                 err = -ENOMEM;
6289                 goto out;
6290         }
6291
6292         nbytes = ksmbd_vfs_read(work, fp, length, &offset, aux_payload_buf);
6293         if (nbytes < 0) {
6294                 err = nbytes;
6295                 goto out;
6296         }
6297
6298         if ((nbytes == 0 && length != 0) || nbytes < mincount) {
6299                 kvfree(aux_payload_buf);
6300                 rsp->hdr.Status = STATUS_END_OF_FILE;
6301                 smb2_set_err_rsp(work);
6302                 ksmbd_fd_put(work, fp);
6303                 return 0;
6304         }
6305
6306         ksmbd_debug(SMB, "nbytes %zu, offset %lld mincount %zu\n",
6307                     nbytes, offset, mincount);
6308
6309         if (is_rdma_channel == true) {
6310                 /* write data to the client using rdma channel */
6311                 remain_bytes = smb2_read_rdma_channel(work, req,
6312                                                       aux_payload_buf,
6313                                                       nbytes);
6314                 kvfree(aux_payload_buf);
6315
6316                 nbytes = 0;
6317                 if (remain_bytes < 0) {
6318                         err = (int)remain_bytes;
6319                         goto out;
6320                 }
6321         }
6322
6323         rsp->StructureSize = cpu_to_le16(17);
6324         rsp->DataOffset = 80;
6325         rsp->Reserved = 0;
6326         rsp->DataLength = cpu_to_le32(nbytes);
6327         rsp->DataRemaining = cpu_to_le32(remain_bytes);
6328         rsp->Flags = 0;
6329         err = ksmbd_iov_pin_rsp_read(work, (void *)rsp,
6330                                      offsetof(struct smb2_read_rsp, Buffer),
6331                                      aux_payload_buf, nbytes);
6332         if (err)
6333                 goto out;
6334         ksmbd_fd_put(work, fp);
6335         return 0;
6336
6337 out:
6338         if (err) {
6339                 if (err == -EISDIR)
6340                         rsp->hdr.Status = STATUS_INVALID_DEVICE_REQUEST;
6341                 else if (err == -EAGAIN)
6342                         rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6343                 else if (err == -ENOENT)
6344                         rsp->hdr.Status = STATUS_FILE_CLOSED;
6345                 else if (err == -EACCES)
6346                         rsp->hdr.Status = STATUS_ACCESS_DENIED;
6347                 else if (err == -ESHARE)
6348                         rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6349                 else if (err == -EINVAL)
6350                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6351                 else
6352                         rsp->hdr.Status = STATUS_INVALID_HANDLE;
6353
6354                 smb2_set_err_rsp(work);
6355         }
6356         ksmbd_fd_put(work, fp);
6357         return err;
6358 }
6359
6360 /**
6361  * smb2_write_pipe() - handler for smb2 write on IPC pipe
6362  * @work:       smb work containing write IPC pipe command buffer
6363  *
6364  * Return:      0 on success, otherwise error
6365  */
6366 static noinline int smb2_write_pipe(struct ksmbd_work *work)
6367 {
6368         struct smb2_write_req *req;
6369         struct smb2_write_rsp *rsp;
6370         struct ksmbd_rpc_command *rpc_resp;
6371         u64 id = 0;
6372         int err = 0, ret = 0;
6373         char *data_buf;
6374         size_t length;
6375
6376         WORK_BUFFERS(work, req, rsp);
6377
6378         length = le32_to_cpu(req->Length);
6379         id = req->VolatileFileId;
6380
6381         if ((u64)le16_to_cpu(req->DataOffset) + length >
6382             get_rfc1002_len(work->request_buf)) {
6383                 pr_err("invalid write data offset %u, smb_len %u\n",
6384                        le16_to_cpu(req->DataOffset),
6385                        get_rfc1002_len(work->request_buf));
6386                 err = -EINVAL;
6387                 goto out;
6388         }
6389
6390         data_buf = (char *)(((char *)&req->hdr.ProtocolId) +
6391                            le16_to_cpu(req->DataOffset));
6392
6393         rpc_resp = ksmbd_rpc_write(work->sess, id, data_buf, length);
6394         if (rpc_resp) {
6395                 if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) {
6396                         rsp->hdr.Status = STATUS_NOT_SUPPORTED;
6397                         kvfree(rpc_resp);
6398                         smb2_set_err_rsp(work);
6399                         return -EOPNOTSUPP;
6400                 }
6401                 if (rpc_resp->flags != KSMBD_RPC_OK) {
6402                         rsp->hdr.Status = STATUS_INVALID_HANDLE;
6403                         smb2_set_err_rsp(work);
6404                         kvfree(rpc_resp);
6405                         return ret;
6406                 }
6407                 kvfree(rpc_resp);
6408         }
6409
6410         rsp->StructureSize = cpu_to_le16(17);
6411         rsp->DataOffset = 0;
6412         rsp->Reserved = 0;
6413         rsp->DataLength = cpu_to_le32(length);
6414         rsp->DataRemaining = 0;
6415         rsp->Reserved2 = 0;
6416         err = ksmbd_iov_pin_rsp(work, (void *)rsp,
6417                                 offsetof(struct smb2_write_rsp, Buffer));
6418 out:
6419         if (err) {
6420                 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6421                 smb2_set_err_rsp(work);
6422         }
6423
6424         return err;
6425 }
6426
6427 static ssize_t smb2_write_rdma_channel(struct ksmbd_work *work,
6428                                        struct smb2_write_req *req,
6429                                        struct ksmbd_file *fp,
6430                                        loff_t offset, size_t length, bool sync)
6431 {
6432         char *data_buf;
6433         int ret;
6434         ssize_t nbytes;
6435
6436         data_buf = kvzalloc(length, GFP_KERNEL);
6437         if (!data_buf)
6438                 return -ENOMEM;
6439
6440         ret = ksmbd_conn_rdma_read(work->conn, data_buf, length,
6441                                    (struct smb2_buffer_desc_v1 *)
6442                                    ((char *)req + le16_to_cpu(req->WriteChannelInfoOffset)),
6443                                    le16_to_cpu(req->WriteChannelInfoLength));
6444         if (ret < 0) {
6445                 kvfree(data_buf);
6446                 return ret;
6447         }
6448
6449         ret = ksmbd_vfs_write(work, fp, data_buf, length, &offset, sync, &nbytes);
6450         kvfree(data_buf);
6451         if (ret < 0)
6452                 return ret;
6453
6454         return nbytes;
6455 }
6456
6457 /**
6458  * smb2_write() - handler for smb2 write from file
6459  * @work:       smb work containing write command buffer
6460  *
6461  * Return:      0 on success, otherwise error
6462  */
6463 int smb2_write(struct ksmbd_work *work)
6464 {
6465         struct smb2_write_req *req;
6466         struct smb2_write_rsp *rsp;
6467         struct ksmbd_file *fp = NULL;
6468         loff_t offset;
6469         size_t length;
6470         ssize_t nbytes;
6471         char *data_buf;
6472         bool writethrough = false, is_rdma_channel = false;
6473         int err = 0;
6474         unsigned int max_write_size = work->conn->vals->max_write_size;
6475
6476         WORK_BUFFERS(work, req, rsp);
6477
6478         if (test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_PIPE)) {
6479                 ksmbd_debug(SMB, "IPC pipe write request\n");
6480                 return smb2_write_pipe(work);
6481         }
6482
6483         offset = le64_to_cpu(req->Offset);
6484         length = le32_to_cpu(req->Length);
6485
6486         if (req->Channel == SMB2_CHANNEL_RDMA_V1 ||
6487             req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE) {
6488                 is_rdma_channel = true;
6489                 max_write_size = get_smbd_max_read_write_size();
6490                 length = le32_to_cpu(req->RemainingBytes);
6491         }
6492
6493         if (is_rdma_channel == true) {
6494                 unsigned int ch_offset = le16_to_cpu(req->WriteChannelInfoOffset);
6495
6496                 if (req->Length != 0 || req->DataOffset != 0 ||
6497                     ch_offset < offsetof(struct smb2_write_req, Buffer)) {
6498                         err = -EINVAL;
6499                         goto out;
6500                 }
6501                 err = smb2_set_remote_key_for_rdma(work,
6502                                                    (struct smb2_buffer_desc_v1 *)
6503                                                    ((char *)req + ch_offset),
6504                                                    req->Channel,
6505                                                    req->WriteChannelInfoLength);
6506                 if (err)
6507                         goto out;
6508         }
6509
6510         if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
6511                 ksmbd_debug(SMB, "User does not have write permission\n");
6512                 err = -EACCES;
6513                 goto out;
6514         }
6515
6516         fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
6517         if (!fp) {
6518                 err = -ENOENT;
6519                 goto out;
6520         }
6521
6522         if (!(fp->daccess & (FILE_WRITE_DATA_LE | FILE_READ_ATTRIBUTES_LE))) {
6523                 pr_err("Not permitted to write : 0x%x\n", fp->daccess);
6524                 err = -EACCES;
6525                 goto out;
6526         }
6527
6528         if (length > max_write_size) {
6529                 ksmbd_debug(SMB, "limiting write size to max size(%u)\n",
6530                             max_write_size);
6531                 err = -EINVAL;
6532                 goto out;
6533         }
6534
6535         ksmbd_debug(SMB, "flags %u\n", le32_to_cpu(req->Flags));
6536         if (le32_to_cpu(req->Flags) & SMB2_WRITEFLAG_WRITE_THROUGH)
6537                 writethrough = true;
6538
6539         if (is_rdma_channel == false) {
6540                 if (le16_to_cpu(req->DataOffset) <
6541                     offsetof(struct smb2_write_req, Buffer)) {
6542                         err = -EINVAL;
6543                         goto out;
6544                 }
6545
6546                 data_buf = (char *)(((char *)&req->hdr.ProtocolId) +
6547                                     le16_to_cpu(req->DataOffset));
6548
6549                 ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n",
6550                             fp->filp, offset, length);
6551                 err = ksmbd_vfs_write(work, fp, data_buf, length, &offset,
6552                                       writethrough, &nbytes);
6553                 if (err < 0)
6554                         goto out;
6555         } else {
6556                 /* read data from the client using rdma channel, and
6557                  * write the data.
6558                  */
6559                 nbytes = smb2_write_rdma_channel(work, req, fp, offset, length,
6560                                                  writethrough);
6561                 if (nbytes < 0) {
6562                         err = (int)nbytes;
6563                         goto out;
6564                 }
6565         }
6566
6567         rsp->StructureSize = cpu_to_le16(17);
6568         rsp->DataOffset = 0;
6569         rsp->Reserved = 0;
6570         rsp->DataLength = cpu_to_le32(nbytes);
6571         rsp->DataRemaining = 0;
6572         rsp->Reserved2 = 0;
6573         err = ksmbd_iov_pin_rsp(work, rsp, offsetof(struct smb2_write_rsp, Buffer));
6574         if (err)
6575                 goto out;
6576         ksmbd_fd_put(work, fp);
6577         return 0;
6578
6579 out:
6580         if (err == -EAGAIN)
6581                 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6582         else if (err == -ENOSPC || err == -EFBIG)
6583                 rsp->hdr.Status = STATUS_DISK_FULL;
6584         else if (err == -ENOENT)
6585                 rsp->hdr.Status = STATUS_FILE_CLOSED;
6586         else if (err == -EACCES)
6587                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
6588         else if (err == -ESHARE)
6589                 rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6590         else if (err == -EINVAL)
6591                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6592         else
6593                 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6594
6595         smb2_set_err_rsp(work);
6596         ksmbd_fd_put(work, fp);
6597         return err;
6598 }
6599
6600 /**
6601  * smb2_flush() - handler for smb2 flush file - fsync
6602  * @work:       smb work containing flush command buffer
6603  *
6604  * Return:      0 on success, otherwise error
6605  */
6606 int smb2_flush(struct ksmbd_work *work)
6607 {
6608         struct smb2_flush_req *req;
6609         struct smb2_flush_rsp *rsp;
6610         int err;
6611
6612         WORK_BUFFERS(work, req, rsp);
6613
6614         ksmbd_debug(SMB, "SMB2_FLUSH called for fid %llu\n", req->VolatileFileId);
6615
6616         err = ksmbd_vfs_fsync(work, req->VolatileFileId, req->PersistentFileId);
6617         if (err)
6618                 goto out;
6619
6620         rsp->StructureSize = cpu_to_le16(4);
6621         rsp->Reserved = 0;
6622         return ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_flush_rsp));
6623
6624 out:
6625         rsp->hdr.Status = STATUS_INVALID_HANDLE;
6626         smb2_set_err_rsp(work);
6627         return err;
6628 }
6629
6630 /**
6631  * smb2_cancel() - handler for smb2 cancel command
6632  * @work:       smb work containing cancel command buffer
6633  *
6634  * Return:      0 on success, otherwise error
6635  */
6636 int smb2_cancel(struct ksmbd_work *work)
6637 {
6638         struct ksmbd_conn *conn = work->conn;
6639         struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
6640         struct smb2_hdr *chdr;
6641         struct ksmbd_work *iter;
6642         struct list_head *command_list;
6643
6644         if (work->next_smb2_rcv_hdr_off)
6645                 hdr = ksmbd_resp_buf_next(work);
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                         iter->state = KSMBD_WORK_CANCELLED;
6667                         if (iter->cancel_fn)
6668                                 iter->cancel_fn(iter->cancel_argv);
6669                         break;
6670                 }
6671                 spin_unlock(&conn->request_lock);
6672         } else {
6673                 command_list = &conn->requests;
6674
6675                 spin_lock(&conn->request_lock);
6676                 list_for_each_entry(iter, command_list, request_entry) {
6677                         chdr = smb2_get_msg(iter->request_buf);
6678
6679                         if (chdr->MessageId != hdr->MessageId ||
6680                             iter == work)
6681                                 continue;
6682
6683                         ksmbd_debug(SMB,
6684                                     "smb2 with mid %llu cancelled command = 0x%x\n",
6685                                     le64_to_cpu(hdr->MessageId),
6686                                     le16_to_cpu(chdr->Command));
6687                         iter->state = KSMBD_WORK_CANCELLED;
6688                         break;
6689                 }
6690                 spin_unlock(&conn->request_lock);
6691         }
6692
6693         /* For SMB2_CANCEL command itself send no response*/
6694         work->send_no_response = 1;
6695         return 0;
6696 }
6697
6698 struct file_lock *smb_flock_init(struct file *f)
6699 {
6700         struct file_lock *fl;
6701
6702         fl = locks_alloc_lock();
6703         if (!fl)
6704                 goto out;
6705
6706         locks_init_lock(fl);
6707
6708         fl->fl_owner = f;
6709         fl->fl_pid = current->tgid;
6710         fl->fl_file = f;
6711         fl->fl_flags = FL_POSIX;
6712         fl->fl_ops = NULL;
6713         fl->fl_lmops = NULL;
6714
6715 out:
6716         return fl;
6717 }
6718
6719 static int smb2_set_flock_flags(struct file_lock *flock, int flags)
6720 {
6721         int cmd = -EINVAL;
6722
6723         /* Checking for wrong flag combination during lock request*/
6724         switch (flags) {
6725         case SMB2_LOCKFLAG_SHARED:
6726                 ksmbd_debug(SMB, "received shared request\n");
6727                 cmd = F_SETLKW;
6728                 flock->fl_type = F_RDLCK;
6729                 flock->fl_flags |= FL_SLEEP;
6730                 break;
6731         case SMB2_LOCKFLAG_EXCLUSIVE:
6732                 ksmbd_debug(SMB, "received exclusive request\n");
6733                 cmd = F_SETLKW;
6734                 flock->fl_type = F_WRLCK;
6735                 flock->fl_flags |= FL_SLEEP;
6736                 break;
6737         case SMB2_LOCKFLAG_SHARED | SMB2_LOCKFLAG_FAIL_IMMEDIATELY:
6738                 ksmbd_debug(SMB,
6739                             "received shared & fail immediately request\n");
6740                 cmd = F_SETLK;
6741                 flock->fl_type = F_RDLCK;
6742                 break;
6743         case SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_FAIL_IMMEDIATELY:
6744                 ksmbd_debug(SMB,
6745                             "received exclusive & fail immediately request\n");
6746                 cmd = F_SETLK;
6747                 flock->fl_type = F_WRLCK;
6748                 break;
6749         case SMB2_LOCKFLAG_UNLOCK:
6750                 ksmbd_debug(SMB, "received unlock request\n");
6751                 flock->fl_type = F_UNLCK;
6752                 cmd = F_SETLK;
6753                 break;
6754         }
6755
6756         return cmd;
6757 }
6758
6759 static struct ksmbd_lock *smb2_lock_init(struct file_lock *flock,
6760                                          unsigned int cmd, int flags,
6761                                          struct list_head *lock_list)
6762 {
6763         struct ksmbd_lock *lock;
6764
6765         lock = kzalloc(sizeof(struct ksmbd_lock), GFP_KERNEL);
6766         if (!lock)
6767                 return NULL;
6768
6769         lock->cmd = cmd;
6770         lock->fl = flock;
6771         lock->start = flock->fl_start;
6772         lock->end = flock->fl_end;
6773         lock->flags = flags;
6774         if (lock->start == lock->end)
6775                 lock->zero_len = 1;
6776         INIT_LIST_HEAD(&lock->clist);
6777         INIT_LIST_HEAD(&lock->flist);
6778         INIT_LIST_HEAD(&lock->llist);
6779         list_add_tail(&lock->llist, lock_list);
6780
6781         return lock;
6782 }
6783
6784 static void smb2_remove_blocked_lock(void **argv)
6785 {
6786         struct file_lock *flock = (struct file_lock *)argv[0];
6787
6788         ksmbd_vfs_posix_lock_unblock(flock);
6789         wake_up(&flock->fl_wait);
6790 }
6791
6792 static inline bool lock_defer_pending(struct file_lock *fl)
6793 {
6794         /* check pending lock waiters */
6795         return waitqueue_active(&fl->fl_wait);
6796 }
6797
6798 /**
6799  * smb2_lock() - handler for smb2 file lock command
6800  * @work:       smb work containing lock command buffer
6801  *
6802  * Return:      0 on success, otherwise error
6803  */
6804 int smb2_lock(struct ksmbd_work *work)
6805 {
6806         struct smb2_lock_req *req;
6807         struct smb2_lock_rsp *rsp;
6808         struct smb2_lock_element *lock_ele;
6809         struct ksmbd_file *fp = NULL;
6810         struct file_lock *flock = NULL;
6811         struct file *filp = NULL;
6812         int lock_count;
6813         int flags = 0;
6814         int cmd = 0;
6815         int err = -EIO, i, rc = 0;
6816         u64 lock_start, lock_length;
6817         struct ksmbd_lock *smb_lock = NULL, *cmp_lock, *tmp, *tmp2;
6818         struct ksmbd_conn *conn;
6819         int nolock = 0;
6820         LIST_HEAD(lock_list);
6821         LIST_HEAD(rollback_list);
6822         int prior_lock = 0;
6823
6824         WORK_BUFFERS(work, req, rsp);
6825
6826         ksmbd_debug(SMB, "Received lock request\n");
6827         fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
6828         if (!fp) {
6829                 ksmbd_debug(SMB, "Invalid file id for lock : %llu\n", req->VolatileFileId);
6830                 err = -ENOENT;
6831                 goto out2;
6832         }
6833
6834         filp = fp->filp;
6835         lock_count = le16_to_cpu(req->LockCount);
6836         lock_ele = req->locks;
6837
6838         ksmbd_debug(SMB, "lock count is %d\n", lock_count);
6839         if (!lock_count) {
6840                 err = -EINVAL;
6841                 goto out2;
6842         }
6843
6844         for (i = 0; i < lock_count; i++) {
6845                 flags = le32_to_cpu(lock_ele[i].Flags);
6846
6847                 flock = smb_flock_init(filp);
6848                 if (!flock)
6849                         goto out;
6850
6851                 cmd = smb2_set_flock_flags(flock, flags);
6852
6853                 lock_start = le64_to_cpu(lock_ele[i].Offset);
6854                 lock_length = le64_to_cpu(lock_ele[i].Length);
6855                 if (lock_start > U64_MAX - lock_length) {
6856                         pr_err("Invalid lock range requested\n");
6857                         rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE;
6858                         locks_free_lock(flock);
6859                         goto out;
6860                 }
6861
6862                 if (lock_start > OFFSET_MAX)
6863                         flock->fl_start = OFFSET_MAX;
6864                 else
6865                         flock->fl_start = lock_start;
6866
6867                 lock_length = le64_to_cpu(lock_ele[i].Length);
6868                 if (lock_length > OFFSET_MAX - flock->fl_start)
6869                         lock_length = OFFSET_MAX - flock->fl_start;
6870
6871                 flock->fl_end = flock->fl_start + lock_length;
6872
6873                 if (flock->fl_end < flock->fl_start) {
6874                         ksmbd_debug(SMB,
6875                                     "the end offset(%llx) is smaller than the start offset(%llx)\n",
6876                                     flock->fl_end, flock->fl_start);
6877                         rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE;
6878                         locks_free_lock(flock);
6879                         goto out;
6880                 }
6881
6882                 /* Check conflict locks in one request */
6883                 list_for_each_entry(cmp_lock, &lock_list, llist) {
6884                         if (cmp_lock->fl->fl_start <= flock->fl_start &&
6885                             cmp_lock->fl->fl_end >= flock->fl_end) {
6886                                 if (cmp_lock->fl->fl_type != F_UNLCK &&
6887                                     flock->fl_type != F_UNLCK) {
6888                                         pr_err("conflict two locks in one request\n");
6889                                         err = -EINVAL;
6890                                         locks_free_lock(flock);
6891                                         goto out;
6892                                 }
6893                         }
6894                 }
6895
6896                 smb_lock = smb2_lock_init(flock, cmd, flags, &lock_list);
6897                 if (!smb_lock) {
6898                         err = -EINVAL;
6899                         locks_free_lock(flock);
6900                         goto out;
6901                 }
6902         }
6903
6904         list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) {
6905                 if (smb_lock->cmd < 0) {
6906                         err = -EINVAL;
6907                         goto out;
6908                 }
6909
6910                 if (!(smb_lock->flags & SMB2_LOCKFLAG_MASK)) {
6911                         err = -EINVAL;
6912                         goto out;
6913                 }
6914
6915                 if ((prior_lock & (SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_SHARED) &&
6916                      smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) ||
6917                     (prior_lock == SMB2_LOCKFLAG_UNLOCK &&
6918                      !(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK))) {
6919                         err = -EINVAL;
6920                         goto out;
6921                 }
6922
6923                 prior_lock = smb_lock->flags;
6924
6925                 if (!(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) &&
6926                     !(smb_lock->flags & SMB2_LOCKFLAG_FAIL_IMMEDIATELY))
6927                         goto no_check_cl;
6928
6929                 nolock = 1;
6930                 /* check locks in connection list */
6931                 down_read(&conn_list_lock);
6932                 list_for_each_entry(conn, &conn_list, conns_list) {
6933                         spin_lock(&conn->llist_lock);
6934                         list_for_each_entry_safe(cmp_lock, tmp2, &conn->lock_list, clist) {
6935                                 if (file_inode(cmp_lock->fl->fl_file) !=
6936                                     file_inode(smb_lock->fl->fl_file))
6937                                         continue;
6938
6939                                 if (smb_lock->fl->fl_type == F_UNLCK) {
6940                                         if (cmp_lock->fl->fl_file == smb_lock->fl->fl_file &&
6941                                             cmp_lock->start == smb_lock->start &&
6942                                             cmp_lock->end == smb_lock->end &&
6943                                             !lock_defer_pending(cmp_lock->fl)) {
6944                                                 nolock = 0;
6945                                                 list_del(&cmp_lock->flist);
6946                                                 list_del(&cmp_lock->clist);
6947                                                 spin_unlock(&conn->llist_lock);
6948                                                 up_read(&conn_list_lock);
6949
6950                                                 locks_free_lock(cmp_lock->fl);
6951                                                 kfree(cmp_lock);
6952                                                 goto out_check_cl;
6953                                         }
6954                                         continue;
6955                                 }
6956
6957                                 if (cmp_lock->fl->fl_file == smb_lock->fl->fl_file) {
6958                                         if (smb_lock->flags & SMB2_LOCKFLAG_SHARED)
6959                                                 continue;
6960                                 } else {
6961                                         if (cmp_lock->flags & SMB2_LOCKFLAG_SHARED)
6962                                                 continue;
6963                                 }
6964
6965                                 /* check zero byte lock range */
6966                                 if (cmp_lock->zero_len && !smb_lock->zero_len &&
6967                                     cmp_lock->start > smb_lock->start &&
6968                                     cmp_lock->start < smb_lock->end) {
6969                                         spin_unlock(&conn->llist_lock);
6970                                         up_read(&conn_list_lock);
6971                                         pr_err("previous lock conflict with zero byte lock range\n");
6972                                         goto out;
6973                                 }
6974
6975                                 if (smb_lock->zero_len && !cmp_lock->zero_len &&
6976                                     smb_lock->start > cmp_lock->start &&
6977                                     smb_lock->start < cmp_lock->end) {
6978                                         spin_unlock(&conn->llist_lock);
6979                                         up_read(&conn_list_lock);
6980                                         pr_err("current lock conflict with zero byte lock range\n");
6981                                         goto out;
6982                                 }
6983
6984                                 if (((cmp_lock->start <= smb_lock->start &&
6985                                       cmp_lock->end > smb_lock->start) ||
6986                                      (cmp_lock->start < smb_lock->end &&
6987                                       cmp_lock->end >= smb_lock->end)) &&
6988                                     !cmp_lock->zero_len && !smb_lock->zero_len) {
6989                                         spin_unlock(&conn->llist_lock);
6990                                         up_read(&conn_list_lock);
6991                                         pr_err("Not allow lock operation on exclusive lock range\n");
6992                                         goto out;
6993                                 }
6994                         }
6995                         spin_unlock(&conn->llist_lock);
6996                 }
6997                 up_read(&conn_list_lock);
6998 out_check_cl:
6999                 if (smb_lock->fl->fl_type == F_UNLCK && nolock) {
7000                         pr_err("Try to unlock nolocked range\n");
7001                         rsp->hdr.Status = STATUS_RANGE_NOT_LOCKED;
7002                         goto out;
7003                 }
7004
7005 no_check_cl:
7006                 if (smb_lock->zero_len) {
7007                         err = 0;
7008                         goto skip;
7009                 }
7010
7011                 flock = smb_lock->fl;
7012                 list_del(&smb_lock->llist);
7013 retry:
7014                 rc = vfs_lock_file(filp, smb_lock->cmd, flock, NULL);
7015 skip:
7016                 if (flags & SMB2_LOCKFLAG_UNLOCK) {
7017                         if (!rc) {
7018                                 ksmbd_debug(SMB, "File unlocked\n");
7019                         } else if (rc == -ENOENT) {
7020                                 rsp->hdr.Status = STATUS_NOT_LOCKED;
7021                                 goto out;
7022                         }
7023                         locks_free_lock(flock);
7024                         kfree(smb_lock);
7025                 } else {
7026                         if (rc == FILE_LOCK_DEFERRED) {
7027                                 void **argv;
7028
7029                                 ksmbd_debug(SMB,
7030                                             "would have to wait for getting lock\n");
7031                                 spin_lock(&work->conn->llist_lock);
7032                                 list_add_tail(&smb_lock->clist,
7033                                               &work->conn->lock_list);
7034                                 spin_unlock(&work->conn->llist_lock);
7035                                 list_add(&smb_lock->llist, &rollback_list);
7036
7037                                 argv = kmalloc(sizeof(void *), GFP_KERNEL);
7038                                 if (!argv) {
7039                                         err = -ENOMEM;
7040                                         goto out;
7041                                 }
7042                                 argv[0] = flock;
7043
7044                                 rc = setup_async_work(work,
7045                                                       smb2_remove_blocked_lock,
7046                                                       argv);
7047                                 if (rc) {
7048                                         err = -ENOMEM;
7049                                         goto out;
7050                                 }
7051                                 spin_lock(&fp->f_lock);
7052                                 list_add(&work->fp_entry, &fp->blocked_works);
7053                                 spin_unlock(&fp->f_lock);
7054
7055                                 smb2_send_interim_resp(work, STATUS_PENDING);
7056
7057                                 ksmbd_vfs_posix_lock_wait(flock);
7058
7059                                 spin_lock(&fp->f_lock);
7060                                 list_del(&work->fp_entry);
7061                                 spin_unlock(&fp->f_lock);
7062
7063                                 if (work->state != KSMBD_WORK_ACTIVE) {
7064                                         list_del(&smb_lock->llist);
7065                                         spin_lock(&work->conn->llist_lock);
7066                                         list_del(&smb_lock->clist);
7067                                         spin_unlock(&work->conn->llist_lock);
7068                                         locks_free_lock(flock);
7069
7070                                         if (work->state == KSMBD_WORK_CANCELLED) {
7071                                                 rsp->hdr.Status =
7072                                                         STATUS_CANCELLED;
7073                                                 kfree(smb_lock);
7074                                                 smb2_send_interim_resp(work,
7075                                                                        STATUS_CANCELLED);
7076                                                 work->send_no_response = 1;
7077                                                 goto out;
7078                                         }
7079
7080                                         rsp->hdr.Status =
7081                                                 STATUS_RANGE_NOT_LOCKED;
7082                                         kfree(smb_lock);
7083                                         goto out2;
7084                                 }
7085
7086                                 list_del(&smb_lock->llist);
7087                                 spin_lock(&work->conn->llist_lock);
7088                                 list_del(&smb_lock->clist);
7089                                 spin_unlock(&work->conn->llist_lock);
7090                                 release_async_work(work);
7091                                 goto retry;
7092                         } else if (!rc) {
7093                                 spin_lock(&work->conn->llist_lock);
7094                                 list_add_tail(&smb_lock->clist,
7095                                               &work->conn->lock_list);
7096                                 list_add_tail(&smb_lock->flist,
7097                                               &fp->lock_list);
7098                                 spin_unlock(&work->conn->llist_lock);
7099                                 list_add(&smb_lock->llist, &rollback_list);
7100                                 ksmbd_debug(SMB, "successful in taking lock\n");
7101                         } else {
7102                                 goto out;
7103                         }
7104                 }
7105         }
7106
7107         if (atomic_read(&fp->f_ci->op_count) > 1)
7108                 smb_break_all_oplock(work, fp);
7109
7110         rsp->StructureSize = cpu_to_le16(4);
7111         ksmbd_debug(SMB, "successful in taking lock\n");
7112         rsp->hdr.Status = STATUS_SUCCESS;
7113         rsp->Reserved = 0;
7114         err = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_lock_rsp));
7115         if (err)
7116                 goto out;
7117
7118         ksmbd_fd_put(work, fp);
7119         return 0;
7120
7121 out:
7122         list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) {
7123                 locks_free_lock(smb_lock->fl);
7124                 list_del(&smb_lock->llist);
7125                 kfree(smb_lock);
7126         }
7127
7128         list_for_each_entry_safe(smb_lock, tmp, &rollback_list, llist) {
7129                 struct file_lock *rlock = NULL;
7130
7131                 rlock = smb_flock_init(filp);
7132                 rlock->fl_type = F_UNLCK;
7133                 rlock->fl_start = smb_lock->start;
7134                 rlock->fl_end = smb_lock->end;
7135
7136                 rc = vfs_lock_file(filp, F_SETLK, rlock, NULL);
7137                 if (rc)
7138                         pr_err("rollback unlock fail : %d\n", rc);
7139
7140                 list_del(&smb_lock->llist);
7141                 spin_lock(&work->conn->llist_lock);
7142                 if (!list_empty(&smb_lock->flist))
7143                         list_del(&smb_lock->flist);
7144                 list_del(&smb_lock->clist);
7145                 spin_unlock(&work->conn->llist_lock);
7146
7147                 locks_free_lock(smb_lock->fl);
7148                 locks_free_lock(rlock);
7149                 kfree(smb_lock);
7150         }
7151 out2:
7152         ksmbd_debug(SMB, "failed in taking lock(flags : %x), err : %d\n", flags, err);
7153
7154         if (!rsp->hdr.Status) {
7155                 if (err == -EINVAL)
7156                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7157                 else if (err == -ENOMEM)
7158                         rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
7159                 else if (err == -ENOENT)
7160                         rsp->hdr.Status = STATUS_FILE_CLOSED;
7161                 else
7162                         rsp->hdr.Status = STATUS_LOCK_NOT_GRANTED;
7163         }
7164
7165         smb2_set_err_rsp(work);
7166         ksmbd_fd_put(work, fp);
7167         return err;
7168 }
7169
7170 static int fsctl_copychunk(struct ksmbd_work *work,
7171                            struct copychunk_ioctl_req *ci_req,
7172                            unsigned int cnt_code,
7173                            unsigned int input_count,
7174                            unsigned long long volatile_id,
7175                            unsigned long long persistent_id,
7176                            struct smb2_ioctl_rsp *rsp)
7177 {
7178         struct copychunk_ioctl_rsp *ci_rsp;
7179         struct ksmbd_file *src_fp = NULL, *dst_fp = NULL;
7180         struct srv_copychunk *chunks;
7181         unsigned int i, chunk_count, chunk_count_written = 0;
7182         unsigned int chunk_size_written = 0;
7183         loff_t total_size_written = 0;
7184         int ret = 0;
7185
7186         ci_rsp = (struct copychunk_ioctl_rsp *)&rsp->Buffer[0];
7187
7188         rsp->VolatileFileId = volatile_id;
7189         rsp->PersistentFileId = persistent_id;
7190         ci_rsp->ChunksWritten =
7191                 cpu_to_le32(ksmbd_server_side_copy_max_chunk_count());
7192         ci_rsp->ChunkBytesWritten =
7193                 cpu_to_le32(ksmbd_server_side_copy_max_chunk_size());
7194         ci_rsp->TotalBytesWritten =
7195                 cpu_to_le32(ksmbd_server_side_copy_max_total_size());
7196
7197         chunks = (struct srv_copychunk *)&ci_req->Chunks[0];
7198         chunk_count = le32_to_cpu(ci_req->ChunkCount);
7199         if (chunk_count == 0)
7200                 goto out;
7201         total_size_written = 0;
7202
7203         /* verify the SRV_COPYCHUNK_COPY packet */
7204         if (chunk_count > ksmbd_server_side_copy_max_chunk_count() ||
7205             input_count < offsetof(struct copychunk_ioctl_req, Chunks) +
7206              chunk_count * sizeof(struct srv_copychunk)) {
7207                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7208                 return -EINVAL;
7209         }
7210
7211         for (i = 0; i < chunk_count; i++) {
7212                 if (le32_to_cpu(chunks[i].Length) == 0 ||
7213                     le32_to_cpu(chunks[i].Length) > ksmbd_server_side_copy_max_chunk_size())
7214                         break;
7215                 total_size_written += le32_to_cpu(chunks[i].Length);
7216         }
7217
7218         if (i < chunk_count ||
7219             total_size_written > ksmbd_server_side_copy_max_total_size()) {
7220                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7221                 return -EINVAL;
7222         }
7223
7224         src_fp = ksmbd_lookup_foreign_fd(work,
7225                                          le64_to_cpu(ci_req->ResumeKey[0]));
7226         dst_fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id);
7227         ret = -EINVAL;
7228         if (!src_fp ||
7229             src_fp->persistent_id != le64_to_cpu(ci_req->ResumeKey[1])) {
7230                 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
7231                 goto out;
7232         }
7233
7234         if (!dst_fp) {
7235                 rsp->hdr.Status = STATUS_FILE_CLOSED;
7236                 goto out;
7237         }
7238
7239         /*
7240          * FILE_READ_DATA should only be included in
7241          * the FSCTL_COPYCHUNK case
7242          */
7243         if (cnt_code == FSCTL_COPYCHUNK &&
7244             !(dst_fp->daccess & (FILE_READ_DATA_LE | FILE_GENERIC_READ_LE))) {
7245                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
7246                 goto out;
7247         }
7248
7249         ret = ksmbd_vfs_copy_file_ranges(work, src_fp, dst_fp,
7250                                          chunks, chunk_count,
7251                                          &chunk_count_written,
7252                                          &chunk_size_written,
7253                                          &total_size_written);
7254         if (ret < 0) {
7255                 if (ret == -EACCES)
7256                         rsp->hdr.Status = STATUS_ACCESS_DENIED;
7257                 if (ret == -EAGAIN)
7258                         rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
7259                 else if (ret == -EBADF)
7260                         rsp->hdr.Status = STATUS_INVALID_HANDLE;
7261                 else if (ret == -EFBIG || ret == -ENOSPC)
7262                         rsp->hdr.Status = STATUS_DISK_FULL;
7263                 else if (ret == -EINVAL)
7264                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7265                 else if (ret == -EISDIR)
7266                         rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
7267                 else if (ret == -E2BIG)
7268                         rsp->hdr.Status = STATUS_INVALID_VIEW_SIZE;
7269                 else
7270                         rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
7271         }
7272
7273         ci_rsp->ChunksWritten = cpu_to_le32(chunk_count_written);
7274         ci_rsp->ChunkBytesWritten = cpu_to_le32(chunk_size_written);
7275         ci_rsp->TotalBytesWritten = cpu_to_le32(total_size_written);
7276 out:
7277         ksmbd_fd_put(work, src_fp);
7278         ksmbd_fd_put(work, dst_fp);
7279         return ret;
7280 }
7281
7282 static __be32 idev_ipv4_address(struct in_device *idev)
7283 {
7284         __be32 addr = 0;
7285
7286         struct in_ifaddr *ifa;
7287
7288         rcu_read_lock();
7289         in_dev_for_each_ifa_rcu(ifa, idev) {
7290                 if (ifa->ifa_flags & IFA_F_SECONDARY)
7291                         continue;
7292
7293                 addr = ifa->ifa_address;
7294                 break;
7295         }
7296         rcu_read_unlock();
7297         return addr;
7298 }
7299
7300 static int fsctl_query_iface_info_ioctl(struct ksmbd_conn *conn,
7301                                         struct smb2_ioctl_rsp *rsp,
7302                                         unsigned int out_buf_len)
7303 {
7304         struct network_interface_info_ioctl_rsp *nii_rsp = NULL;
7305         int nbytes = 0;
7306         struct net_device *netdev;
7307         struct sockaddr_storage_rsp *sockaddr_storage;
7308         unsigned int flags;
7309         unsigned long long speed;
7310
7311         rtnl_lock();
7312         for_each_netdev(&init_net, netdev) {
7313                 bool ipv4_set = false;
7314
7315                 if (netdev->type == ARPHRD_LOOPBACK)
7316                         continue;
7317
7318                 flags = dev_get_flags(netdev);
7319                 if (!(flags & IFF_RUNNING))
7320                         continue;
7321 ipv6_retry:
7322                 if (out_buf_len <
7323                     nbytes + sizeof(struct network_interface_info_ioctl_rsp)) {
7324                         rtnl_unlock();
7325                         return -ENOSPC;
7326                 }
7327
7328                 nii_rsp = (struct network_interface_info_ioctl_rsp *)
7329                                 &rsp->Buffer[nbytes];
7330                 nii_rsp->IfIndex = cpu_to_le32(netdev->ifindex);
7331
7332                 nii_rsp->Capability = 0;
7333                 if (netdev->real_num_tx_queues > 1)
7334                         nii_rsp->Capability |= cpu_to_le32(RSS_CAPABLE);
7335                 if (ksmbd_rdma_capable_netdev(netdev))
7336                         nii_rsp->Capability |= cpu_to_le32(RDMA_CAPABLE);
7337
7338                 nii_rsp->Next = cpu_to_le32(152);
7339                 nii_rsp->Reserved = 0;
7340
7341                 if (netdev->ethtool_ops->get_link_ksettings) {
7342                         struct ethtool_link_ksettings cmd;
7343
7344                         netdev->ethtool_ops->get_link_ksettings(netdev, &cmd);
7345                         speed = cmd.base.speed;
7346                 } else {
7347                         ksmbd_debug(SMB, "%s %s\n", netdev->name,
7348                                     "speed is unknown, defaulting to 1Gb/sec");
7349                         speed = SPEED_1000;
7350                 }
7351
7352                 speed *= 1000000;
7353                 nii_rsp->LinkSpeed = cpu_to_le64(speed);
7354
7355                 sockaddr_storage = (struct sockaddr_storage_rsp *)
7356                                         nii_rsp->SockAddr_Storage;
7357                 memset(sockaddr_storage, 0, 128);
7358
7359                 if (!ipv4_set) {
7360                         struct in_device *idev;
7361
7362                         sockaddr_storage->Family = cpu_to_le16(INTERNETWORK);
7363                         sockaddr_storage->addr4.Port = 0;
7364
7365                         idev = __in_dev_get_rtnl(netdev);
7366                         if (!idev)
7367                                 continue;
7368                         sockaddr_storage->addr4.IPv4address =
7369                                                 idev_ipv4_address(idev);
7370                         nbytes += sizeof(struct network_interface_info_ioctl_rsp);
7371                         ipv4_set = true;
7372                         goto ipv6_retry;
7373                 } else {
7374                         struct inet6_dev *idev6;
7375                         struct inet6_ifaddr *ifa;
7376                         __u8 *ipv6_addr = sockaddr_storage->addr6.IPv6address;
7377
7378                         sockaddr_storage->Family = cpu_to_le16(INTERNETWORKV6);
7379                         sockaddr_storage->addr6.Port = 0;
7380                         sockaddr_storage->addr6.FlowInfo = 0;
7381
7382                         idev6 = __in6_dev_get(netdev);
7383                         if (!idev6)
7384                                 continue;
7385
7386                         list_for_each_entry(ifa, &idev6->addr_list, if_list) {
7387                                 if (ifa->flags & (IFA_F_TENTATIVE |
7388                                                         IFA_F_DEPRECATED))
7389                                         continue;
7390                                 memcpy(ipv6_addr, ifa->addr.s6_addr, 16);
7391                                 break;
7392                         }
7393                         sockaddr_storage->addr6.ScopeId = 0;
7394                         nbytes += sizeof(struct network_interface_info_ioctl_rsp);
7395                 }
7396         }
7397         rtnl_unlock();
7398
7399         /* zero if this is last one */
7400         if (nii_rsp)
7401                 nii_rsp->Next = 0;
7402
7403         rsp->PersistentFileId = SMB2_NO_FID;
7404         rsp->VolatileFileId = SMB2_NO_FID;
7405         return nbytes;
7406 }
7407
7408 static int fsctl_validate_negotiate_info(struct ksmbd_conn *conn,
7409                                          struct validate_negotiate_info_req *neg_req,
7410                                          struct validate_negotiate_info_rsp *neg_rsp,
7411                                          unsigned int in_buf_len)
7412 {
7413         int ret = 0;
7414         int dialect;
7415
7416         if (in_buf_len < offsetof(struct validate_negotiate_info_req, Dialects) +
7417                         le16_to_cpu(neg_req->DialectCount) * sizeof(__le16))
7418                 return -EINVAL;
7419
7420         dialect = ksmbd_lookup_dialect_by_id(neg_req->Dialects,
7421                                              neg_req->DialectCount);
7422         if (dialect == BAD_PROT_ID || dialect != conn->dialect) {
7423                 ret = -EINVAL;
7424                 goto err_out;
7425         }
7426
7427         if (strncmp(neg_req->Guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE)) {
7428                 ret = -EINVAL;
7429                 goto err_out;
7430         }
7431
7432         if (le16_to_cpu(neg_req->SecurityMode) != conn->cli_sec_mode) {
7433                 ret = -EINVAL;
7434                 goto err_out;
7435         }
7436
7437         if (le32_to_cpu(neg_req->Capabilities) != conn->cli_cap) {
7438                 ret = -EINVAL;
7439                 goto err_out;
7440         }
7441
7442         neg_rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
7443         memset(neg_rsp->Guid, 0, SMB2_CLIENT_GUID_SIZE);
7444         neg_rsp->SecurityMode = cpu_to_le16(conn->srv_sec_mode);
7445         neg_rsp->Dialect = cpu_to_le16(conn->dialect);
7446 err_out:
7447         return ret;
7448 }
7449
7450 static int fsctl_query_allocated_ranges(struct ksmbd_work *work, u64 id,
7451                                         struct file_allocated_range_buffer *qar_req,
7452                                         struct file_allocated_range_buffer *qar_rsp,
7453                                         unsigned int in_count, unsigned int *out_count)
7454 {
7455         struct ksmbd_file *fp;
7456         loff_t start, length;
7457         int ret = 0;
7458
7459         *out_count = 0;
7460         if (in_count == 0)
7461                 return -EINVAL;
7462
7463         start = le64_to_cpu(qar_req->file_offset);
7464         length = le64_to_cpu(qar_req->length);
7465
7466         if (start < 0 || length < 0)
7467                 return -EINVAL;
7468
7469         fp = ksmbd_lookup_fd_fast(work, id);
7470         if (!fp)
7471                 return -ENOENT;
7472
7473         ret = ksmbd_vfs_fqar_lseek(fp, start, length,
7474                                    qar_rsp, in_count, out_count);
7475         if (ret && ret != -E2BIG)
7476                 *out_count = 0;
7477
7478         ksmbd_fd_put(work, fp);
7479         return ret;
7480 }
7481
7482 static int fsctl_pipe_transceive(struct ksmbd_work *work, u64 id,
7483                                  unsigned int out_buf_len,
7484                                  struct smb2_ioctl_req *req,
7485                                  struct smb2_ioctl_rsp *rsp)
7486 {
7487         struct ksmbd_rpc_command *rpc_resp;
7488         char *data_buf = (char *)&req->Buffer[0];
7489         int nbytes = 0;
7490
7491         rpc_resp = ksmbd_rpc_ioctl(work->sess, id, data_buf,
7492                                    le32_to_cpu(req->InputCount));
7493         if (rpc_resp) {
7494                 if (rpc_resp->flags == KSMBD_RPC_SOME_NOT_MAPPED) {
7495                         /*
7496                          * set STATUS_SOME_NOT_MAPPED response
7497                          * for unknown domain sid.
7498                          */
7499                         rsp->hdr.Status = STATUS_SOME_NOT_MAPPED;
7500                 } else if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) {
7501                         rsp->hdr.Status = STATUS_NOT_SUPPORTED;
7502                         goto out;
7503                 } else if (rpc_resp->flags != KSMBD_RPC_OK) {
7504                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7505                         goto out;
7506                 }
7507
7508                 nbytes = rpc_resp->payload_sz;
7509                 if (rpc_resp->payload_sz > out_buf_len) {
7510                         rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;
7511                         nbytes = out_buf_len;
7512                 }
7513
7514                 if (!rpc_resp->payload_sz) {
7515                         rsp->hdr.Status =
7516                                 STATUS_UNEXPECTED_IO_ERROR;
7517                         goto out;
7518                 }
7519
7520                 memcpy((char *)rsp->Buffer, rpc_resp->payload, nbytes);
7521         }
7522 out:
7523         kvfree(rpc_resp);
7524         return nbytes;
7525 }
7526
7527 static inline int fsctl_set_sparse(struct ksmbd_work *work, u64 id,
7528                                    struct file_sparse *sparse)
7529 {
7530         struct ksmbd_file *fp;
7531         struct mnt_idmap *idmap;
7532         int ret = 0;
7533         __le32 old_fattr;
7534
7535         fp = ksmbd_lookup_fd_fast(work, id);
7536         if (!fp)
7537                 return -ENOENT;
7538         idmap = file_mnt_idmap(fp->filp);
7539
7540         old_fattr = fp->f_ci->m_fattr;
7541         if (sparse->SetSparse)
7542                 fp->f_ci->m_fattr |= FILE_ATTRIBUTE_SPARSE_FILE_LE;
7543         else
7544                 fp->f_ci->m_fattr &= ~FILE_ATTRIBUTE_SPARSE_FILE_LE;
7545
7546         if (fp->f_ci->m_fattr != old_fattr &&
7547             test_share_config_flag(work->tcon->share_conf,
7548                                    KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) {
7549                 struct xattr_dos_attrib da;
7550
7551                 ret = ksmbd_vfs_get_dos_attrib_xattr(idmap,
7552                                                      fp->filp->f_path.dentry, &da);
7553                 if (ret <= 0)
7554                         goto out;
7555
7556                 da.attr = le32_to_cpu(fp->f_ci->m_fattr);
7557                 ret = ksmbd_vfs_set_dos_attrib_xattr(idmap,
7558                                                      &fp->filp->f_path, &da);
7559                 if (ret)
7560                         fp->f_ci->m_fattr = old_fattr;
7561         }
7562
7563 out:
7564         ksmbd_fd_put(work, fp);
7565         return ret;
7566 }
7567
7568 static int fsctl_request_resume_key(struct ksmbd_work *work,
7569                                     struct smb2_ioctl_req *req,
7570                                     struct resume_key_ioctl_rsp *key_rsp)
7571 {
7572         struct ksmbd_file *fp;
7573
7574         fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
7575         if (!fp)
7576                 return -ENOENT;
7577
7578         memset(key_rsp, 0, sizeof(*key_rsp));
7579         key_rsp->ResumeKey[0] = req->VolatileFileId;
7580         key_rsp->ResumeKey[1] = req->PersistentFileId;
7581         ksmbd_fd_put(work, fp);
7582
7583         return 0;
7584 }
7585
7586 /**
7587  * smb2_ioctl() - handler for smb2 ioctl command
7588  * @work:       smb work containing ioctl command buffer
7589  *
7590  * Return:      0 on success, otherwise error
7591  */
7592 int smb2_ioctl(struct ksmbd_work *work)
7593 {
7594         struct smb2_ioctl_req *req;
7595         struct smb2_ioctl_rsp *rsp;
7596         unsigned int cnt_code, nbytes = 0, out_buf_len, in_buf_len;
7597         u64 id = KSMBD_NO_FID;
7598         struct ksmbd_conn *conn = work->conn;
7599         int ret = 0;
7600
7601         if (work->next_smb2_rcv_hdr_off) {
7602                 req = ksmbd_req_buf_next(work);
7603                 rsp = ksmbd_resp_buf_next(work);
7604                 if (!has_file_id(req->VolatileFileId)) {
7605                         ksmbd_debug(SMB, "Compound request set FID = %llu\n",
7606                                     work->compound_fid);
7607                         id = work->compound_fid;
7608                 }
7609         } else {
7610                 req = smb2_get_msg(work->request_buf);
7611                 rsp = smb2_get_msg(work->response_buf);
7612         }
7613
7614         if (!has_file_id(id))
7615                 id = req->VolatileFileId;
7616
7617         if (req->Flags != cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL)) {
7618                 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
7619                 goto out;
7620         }
7621
7622         cnt_code = le32_to_cpu(req->CtlCode);
7623         ret = smb2_calc_max_out_buf_len(work, 48,
7624                                         le32_to_cpu(req->MaxOutputResponse));
7625         if (ret < 0) {
7626                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7627                 goto out;
7628         }
7629         out_buf_len = (unsigned int)ret;
7630         in_buf_len = le32_to_cpu(req->InputCount);
7631
7632         switch (cnt_code) {
7633         case FSCTL_DFS_GET_REFERRALS:
7634         case FSCTL_DFS_GET_REFERRALS_EX:
7635                 /* Not support DFS yet */
7636                 rsp->hdr.Status = STATUS_FS_DRIVER_REQUIRED;
7637                 goto out;
7638         case FSCTL_CREATE_OR_GET_OBJECT_ID:
7639         {
7640                 struct file_object_buf_type1_ioctl_rsp *obj_buf;
7641
7642                 nbytes = sizeof(struct file_object_buf_type1_ioctl_rsp);
7643                 obj_buf = (struct file_object_buf_type1_ioctl_rsp *)
7644                         &rsp->Buffer[0];
7645
7646                 /*
7647                  * TODO: This is dummy implementation to pass smbtorture
7648                  * Need to check correct response later
7649                  */
7650                 memset(obj_buf->ObjectId, 0x0, 16);
7651                 memset(obj_buf->BirthVolumeId, 0x0, 16);
7652                 memset(obj_buf->BirthObjectId, 0x0, 16);
7653                 memset(obj_buf->DomainId, 0x0, 16);
7654
7655                 break;
7656         }
7657         case FSCTL_PIPE_TRANSCEIVE:
7658                 out_buf_len = min_t(u32, KSMBD_IPC_MAX_PAYLOAD, out_buf_len);
7659                 nbytes = fsctl_pipe_transceive(work, id, out_buf_len, req, rsp);
7660                 break;
7661         case FSCTL_VALIDATE_NEGOTIATE_INFO:
7662                 if (conn->dialect < SMB30_PROT_ID) {
7663                         ret = -EOPNOTSUPP;
7664                         goto out;
7665                 }
7666
7667                 if (in_buf_len < offsetof(struct validate_negotiate_info_req,
7668                                           Dialects)) {
7669                         ret = -EINVAL;
7670                         goto out;
7671                 }
7672
7673                 if (out_buf_len < sizeof(struct validate_negotiate_info_rsp)) {
7674                         ret = -EINVAL;
7675                         goto out;
7676                 }
7677
7678                 ret = fsctl_validate_negotiate_info(conn,
7679                         (struct validate_negotiate_info_req *)&req->Buffer[0],
7680                         (struct validate_negotiate_info_rsp *)&rsp->Buffer[0],
7681                         in_buf_len);
7682                 if (ret < 0)
7683                         goto out;
7684
7685                 nbytes = sizeof(struct validate_negotiate_info_rsp);
7686                 rsp->PersistentFileId = SMB2_NO_FID;
7687                 rsp->VolatileFileId = SMB2_NO_FID;
7688                 break;
7689         case FSCTL_QUERY_NETWORK_INTERFACE_INFO:
7690                 ret = fsctl_query_iface_info_ioctl(conn, rsp, out_buf_len);
7691                 if (ret < 0)
7692                         goto out;
7693                 nbytes = ret;
7694                 break;
7695         case FSCTL_REQUEST_RESUME_KEY:
7696                 if (out_buf_len < sizeof(struct resume_key_ioctl_rsp)) {
7697                         ret = -EINVAL;
7698                         goto out;
7699                 }
7700
7701                 ret = fsctl_request_resume_key(work, req,
7702                                                (struct resume_key_ioctl_rsp *)&rsp->Buffer[0]);
7703                 if (ret < 0)
7704                         goto out;
7705                 rsp->PersistentFileId = req->PersistentFileId;
7706                 rsp->VolatileFileId = req->VolatileFileId;
7707                 nbytes = sizeof(struct resume_key_ioctl_rsp);
7708                 break;
7709         case FSCTL_COPYCHUNK:
7710         case FSCTL_COPYCHUNK_WRITE:
7711                 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
7712                         ksmbd_debug(SMB,
7713                                     "User does not have write permission\n");
7714                         ret = -EACCES;
7715                         goto out;
7716                 }
7717
7718                 if (in_buf_len < sizeof(struct copychunk_ioctl_req)) {
7719                         ret = -EINVAL;
7720                         goto out;
7721                 }
7722
7723                 if (out_buf_len < sizeof(struct copychunk_ioctl_rsp)) {
7724                         ret = -EINVAL;
7725                         goto out;
7726                 }
7727
7728                 nbytes = sizeof(struct copychunk_ioctl_rsp);
7729                 rsp->VolatileFileId = req->VolatileFileId;
7730                 rsp->PersistentFileId = req->PersistentFileId;
7731                 fsctl_copychunk(work,
7732                                 (struct copychunk_ioctl_req *)&req->Buffer[0],
7733                                 le32_to_cpu(req->CtlCode),
7734                                 le32_to_cpu(req->InputCount),
7735                                 req->VolatileFileId,
7736                                 req->PersistentFileId,
7737                                 rsp);
7738                 break;
7739         case FSCTL_SET_SPARSE:
7740                 if (in_buf_len < sizeof(struct file_sparse)) {
7741                         ret = -EINVAL;
7742                         goto out;
7743                 }
7744
7745                 ret = fsctl_set_sparse(work, id,
7746                                        (struct file_sparse *)&req->Buffer[0]);
7747                 if (ret < 0)
7748                         goto out;
7749                 break;
7750         case FSCTL_SET_ZERO_DATA:
7751         {
7752                 struct file_zero_data_information *zero_data;
7753                 struct ksmbd_file *fp;
7754                 loff_t off, len, bfz;
7755
7756                 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
7757                         ksmbd_debug(SMB,
7758                                     "User does not have write permission\n");
7759                         ret = -EACCES;
7760                         goto out;
7761                 }
7762
7763                 if (in_buf_len < sizeof(struct file_zero_data_information)) {
7764                         ret = -EINVAL;
7765                         goto out;
7766                 }
7767
7768                 zero_data =
7769                         (struct file_zero_data_information *)&req->Buffer[0];
7770
7771                 off = le64_to_cpu(zero_data->FileOffset);
7772                 bfz = le64_to_cpu(zero_data->BeyondFinalZero);
7773                 if (off < 0 || bfz < 0 || off > bfz) {
7774                         ret = -EINVAL;
7775                         goto out;
7776                 }
7777
7778                 len = bfz - off;
7779                 if (len) {
7780                         fp = ksmbd_lookup_fd_fast(work, id);
7781                         if (!fp) {
7782                                 ret = -ENOENT;
7783                                 goto out;
7784                         }
7785
7786                         ret = ksmbd_vfs_zero_data(work, fp, off, len);
7787                         ksmbd_fd_put(work, fp);
7788                         if (ret < 0)
7789                                 goto out;
7790                 }
7791                 break;
7792         }
7793         case FSCTL_QUERY_ALLOCATED_RANGES:
7794                 if (in_buf_len < sizeof(struct file_allocated_range_buffer)) {
7795                         ret = -EINVAL;
7796                         goto out;
7797                 }
7798
7799                 ret = fsctl_query_allocated_ranges(work, id,
7800                         (struct file_allocated_range_buffer *)&req->Buffer[0],
7801                         (struct file_allocated_range_buffer *)&rsp->Buffer[0],
7802                         out_buf_len /
7803                         sizeof(struct file_allocated_range_buffer), &nbytes);
7804                 if (ret == -E2BIG) {
7805                         rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;
7806                 } else if (ret < 0) {
7807                         nbytes = 0;
7808                         goto out;
7809                 }
7810
7811                 nbytes *= sizeof(struct file_allocated_range_buffer);
7812                 break;
7813         case FSCTL_GET_REPARSE_POINT:
7814         {
7815                 struct reparse_data_buffer *reparse_ptr;
7816                 struct ksmbd_file *fp;
7817
7818                 reparse_ptr = (struct reparse_data_buffer *)&rsp->Buffer[0];
7819                 fp = ksmbd_lookup_fd_fast(work, id);
7820                 if (!fp) {
7821                         pr_err("not found fp!!\n");
7822                         ret = -ENOENT;
7823                         goto out;
7824                 }
7825
7826                 reparse_ptr->ReparseTag =
7827                         smb2_get_reparse_tag_special_file(file_inode(fp->filp)->i_mode);
7828                 reparse_ptr->ReparseDataLength = 0;
7829                 ksmbd_fd_put(work, fp);
7830                 nbytes = sizeof(struct reparse_data_buffer);
7831                 break;
7832         }
7833         case FSCTL_DUPLICATE_EXTENTS_TO_FILE:
7834         {
7835                 struct ksmbd_file *fp_in, *fp_out = NULL;
7836                 struct duplicate_extents_to_file *dup_ext;
7837                 loff_t src_off, dst_off, length, cloned;
7838
7839                 if (in_buf_len < sizeof(struct duplicate_extents_to_file)) {
7840                         ret = -EINVAL;
7841                         goto out;
7842                 }
7843
7844                 dup_ext = (struct duplicate_extents_to_file *)&req->Buffer[0];
7845
7846                 fp_in = ksmbd_lookup_fd_slow(work, dup_ext->VolatileFileHandle,
7847                                              dup_ext->PersistentFileHandle);
7848                 if (!fp_in) {
7849                         pr_err("not found file handle in duplicate extent to file\n");
7850                         ret = -ENOENT;
7851                         goto out;
7852                 }
7853
7854                 fp_out = ksmbd_lookup_fd_fast(work, id);
7855                 if (!fp_out) {
7856                         pr_err("not found fp\n");
7857                         ret = -ENOENT;
7858                         goto dup_ext_out;
7859                 }
7860
7861                 src_off = le64_to_cpu(dup_ext->SourceFileOffset);
7862                 dst_off = le64_to_cpu(dup_ext->TargetFileOffset);
7863                 length = le64_to_cpu(dup_ext->ByteCount);
7864                 /*
7865                  * XXX: It is not clear if FSCTL_DUPLICATE_EXTENTS_TO_FILE
7866                  * should fall back to vfs_copy_file_range().  This could be
7867                  * beneficial when re-exporting nfs/smb mount, but note that
7868                  * this can result in partial copy that returns an error status.
7869                  * If/when FSCTL_DUPLICATE_EXTENTS_TO_FILE_EX is implemented,
7870                  * fall back to vfs_copy_file_range(), should be avoided when
7871                  * the flag DUPLICATE_EXTENTS_DATA_EX_SOURCE_ATOMIC is set.
7872                  */
7873                 cloned = vfs_clone_file_range(fp_in->filp, src_off,
7874                                               fp_out->filp, dst_off, length, 0);
7875                 if (cloned == -EXDEV || cloned == -EOPNOTSUPP) {
7876                         ret = -EOPNOTSUPP;
7877                         goto dup_ext_out;
7878                 } else if (cloned != length) {
7879                         cloned = vfs_copy_file_range(fp_in->filp, src_off,
7880                                                      fp_out->filp, dst_off,
7881                                                      length, 0);
7882                         if (cloned != length) {
7883                                 if (cloned < 0)
7884                                         ret = cloned;
7885                                 else
7886                                         ret = -EINVAL;
7887                         }
7888                 }
7889
7890 dup_ext_out:
7891                 ksmbd_fd_put(work, fp_in);
7892                 ksmbd_fd_put(work, fp_out);
7893                 if (ret < 0)
7894                         goto out;
7895                 break;
7896         }
7897         default:
7898                 ksmbd_debug(SMB, "not implemented yet ioctl command 0x%x\n",
7899                             cnt_code);
7900                 ret = -EOPNOTSUPP;
7901                 goto out;
7902         }
7903
7904         rsp->CtlCode = cpu_to_le32(cnt_code);
7905         rsp->InputCount = cpu_to_le32(0);
7906         rsp->InputOffset = cpu_to_le32(112);
7907         rsp->OutputOffset = cpu_to_le32(112);
7908         rsp->OutputCount = cpu_to_le32(nbytes);
7909         rsp->StructureSize = cpu_to_le16(49);
7910         rsp->Reserved = cpu_to_le16(0);
7911         rsp->Flags = cpu_to_le32(0);
7912         rsp->Reserved2 = cpu_to_le32(0);
7913         ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_ioctl_rsp) + nbytes);
7914         if (!ret)
7915                 return ret;
7916
7917 out:
7918         if (ret == -EACCES)
7919                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
7920         else if (ret == -ENOENT)
7921                 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
7922         else if (ret == -EOPNOTSUPP)
7923                 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
7924         else if (ret == -ENOSPC)
7925                 rsp->hdr.Status = STATUS_BUFFER_TOO_SMALL;
7926         else if (ret < 0 || rsp->hdr.Status == 0)
7927                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7928         smb2_set_err_rsp(work);
7929         return 0;
7930 }
7931
7932 /**
7933  * smb20_oplock_break_ack() - handler for smb2.0 oplock break command
7934  * @work:       smb work containing oplock break command buffer
7935  *
7936  * Return:      0
7937  */
7938 static void smb20_oplock_break_ack(struct ksmbd_work *work)
7939 {
7940         struct smb2_oplock_break *req;
7941         struct smb2_oplock_break *rsp;
7942         struct ksmbd_file *fp;
7943         struct oplock_info *opinfo = NULL;
7944         __le32 err = 0;
7945         int ret = 0;
7946         u64 volatile_id, persistent_id;
7947         char req_oplevel = 0, rsp_oplevel = 0;
7948         unsigned int oplock_change_type;
7949
7950         WORK_BUFFERS(work, req, rsp);
7951
7952         volatile_id = req->VolatileFid;
7953         persistent_id = req->PersistentFid;
7954         req_oplevel = req->OplockLevel;
7955         ksmbd_debug(OPLOCK, "v_id %llu, p_id %llu request oplock level %d\n",
7956                     volatile_id, persistent_id, req_oplevel);
7957
7958         fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id);
7959         if (!fp) {
7960                 rsp->hdr.Status = STATUS_FILE_CLOSED;
7961                 smb2_set_err_rsp(work);
7962                 return;
7963         }
7964
7965         opinfo = opinfo_get(fp);
7966         if (!opinfo) {
7967                 pr_err("unexpected null oplock_info\n");
7968                 rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL;
7969                 smb2_set_err_rsp(work);
7970                 ksmbd_fd_put(work, fp);
7971                 return;
7972         }
7973
7974         if (opinfo->level == SMB2_OPLOCK_LEVEL_NONE) {
7975                 rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL;
7976                 goto err_out;
7977         }
7978
7979         if (opinfo->op_state == OPLOCK_STATE_NONE) {
7980                 ksmbd_debug(SMB, "unexpected oplock state 0x%x\n", opinfo->op_state);
7981                 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
7982                 goto err_out;
7983         }
7984
7985         if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
7986              opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
7987             (req_oplevel != SMB2_OPLOCK_LEVEL_II &&
7988              req_oplevel != SMB2_OPLOCK_LEVEL_NONE)) {
7989                 err = STATUS_INVALID_OPLOCK_PROTOCOL;
7990                 oplock_change_type = OPLOCK_WRITE_TO_NONE;
7991         } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II &&
7992                    req_oplevel != SMB2_OPLOCK_LEVEL_NONE) {
7993                 err = STATUS_INVALID_OPLOCK_PROTOCOL;
7994                 oplock_change_type = OPLOCK_READ_TO_NONE;
7995         } else if (req_oplevel == SMB2_OPLOCK_LEVEL_II ||
7996                    req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
7997                 err = STATUS_INVALID_DEVICE_STATE;
7998                 if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
7999                      opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
8000                     req_oplevel == SMB2_OPLOCK_LEVEL_II) {
8001                         oplock_change_type = OPLOCK_WRITE_TO_READ;
8002                 } else if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
8003                             opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
8004                            req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
8005                         oplock_change_type = OPLOCK_WRITE_TO_NONE;
8006                 } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II &&
8007                            req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
8008                         oplock_change_type = OPLOCK_READ_TO_NONE;
8009                 } else {
8010                         oplock_change_type = 0;
8011                 }
8012         } else {
8013                 oplock_change_type = 0;
8014         }
8015
8016         switch (oplock_change_type) {
8017         case OPLOCK_WRITE_TO_READ:
8018                 ret = opinfo_write_to_read(opinfo);
8019                 rsp_oplevel = SMB2_OPLOCK_LEVEL_II;
8020                 break;
8021         case OPLOCK_WRITE_TO_NONE:
8022                 ret = opinfo_write_to_none(opinfo);
8023                 rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE;
8024                 break;
8025         case OPLOCK_READ_TO_NONE:
8026                 ret = opinfo_read_to_none(opinfo);
8027                 rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE;
8028                 break;
8029         default:
8030                 pr_err("unknown oplock change 0x%x -> 0x%x\n",
8031                        opinfo->level, rsp_oplevel);
8032         }
8033
8034         if (ret < 0) {
8035                 rsp->hdr.Status = err;
8036                 goto err_out;
8037         }
8038
8039         opinfo_put(opinfo);
8040         ksmbd_fd_put(work, fp);
8041         opinfo->op_state = OPLOCK_STATE_NONE;
8042         wake_up_interruptible_all(&opinfo->oplock_q);
8043
8044         rsp->StructureSize = cpu_to_le16(24);
8045         rsp->OplockLevel = rsp_oplevel;
8046         rsp->Reserved = 0;
8047         rsp->Reserved2 = 0;
8048         rsp->VolatileFid = volatile_id;
8049         rsp->PersistentFid = persistent_id;
8050         ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_oplock_break));
8051         if (!ret)
8052                 return;
8053
8054 err_out:
8055         opinfo->op_state = OPLOCK_STATE_NONE;
8056         wake_up_interruptible_all(&opinfo->oplock_q);
8057
8058         opinfo_put(opinfo);
8059         ksmbd_fd_put(work, fp);
8060         smb2_set_err_rsp(work);
8061 }
8062
8063 static int check_lease_state(struct lease *lease, __le32 req_state)
8064 {
8065         if ((lease->new_state ==
8066              (SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE)) &&
8067             !(req_state & SMB2_LEASE_WRITE_CACHING_LE)) {
8068                 lease->new_state = req_state;
8069                 return 0;
8070         }
8071
8072         if (lease->new_state == req_state)
8073                 return 0;
8074
8075         return 1;
8076 }
8077
8078 /**
8079  * smb21_lease_break_ack() - handler for smb2.1 lease break command
8080  * @work:       smb work containing lease break command buffer
8081  *
8082  * Return:      0
8083  */
8084 static void smb21_lease_break_ack(struct ksmbd_work *work)
8085 {
8086         struct ksmbd_conn *conn = work->conn;
8087         struct smb2_lease_ack *req;
8088         struct smb2_lease_ack *rsp;
8089         struct oplock_info *opinfo;
8090         __le32 err = 0;
8091         int ret = 0;
8092         unsigned int lease_change_type;
8093         __le32 lease_state;
8094         struct lease *lease;
8095
8096         WORK_BUFFERS(work, req, rsp);
8097
8098         ksmbd_debug(OPLOCK, "smb21 lease break, lease state(0x%x)\n",
8099                     le32_to_cpu(req->LeaseState));
8100         opinfo = lookup_lease_in_table(conn, req->LeaseKey);
8101         if (!opinfo) {
8102                 ksmbd_debug(OPLOCK, "file not opened\n");
8103                 smb2_set_err_rsp(work);
8104                 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8105                 return;
8106         }
8107         lease = opinfo->o_lease;
8108
8109         if (opinfo->op_state == OPLOCK_STATE_NONE) {
8110                 pr_err("unexpected lease break state 0x%x\n",
8111                        opinfo->op_state);
8112                 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8113                 goto err_out;
8114         }
8115
8116         if (check_lease_state(lease, req->LeaseState)) {
8117                 rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED;
8118                 ksmbd_debug(OPLOCK,
8119                             "req lease state: 0x%x, expected state: 0x%x\n",
8120                             req->LeaseState, lease->new_state);
8121                 goto err_out;
8122         }
8123
8124         if (!atomic_read(&opinfo->breaking_cnt)) {
8125                 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8126                 goto err_out;
8127         }
8128
8129         /* check for bad lease state */
8130         if (req->LeaseState &
8131             (~(SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE))) {
8132                 err = STATUS_INVALID_OPLOCK_PROTOCOL;
8133                 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
8134                         lease_change_type = OPLOCK_WRITE_TO_NONE;
8135                 else
8136                         lease_change_type = OPLOCK_READ_TO_NONE;
8137                 ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n",
8138                             le32_to_cpu(lease->state),
8139                             le32_to_cpu(req->LeaseState));
8140         } else if (lease->state == SMB2_LEASE_READ_CACHING_LE &&
8141                    req->LeaseState != SMB2_LEASE_NONE_LE) {
8142                 err = STATUS_INVALID_OPLOCK_PROTOCOL;
8143                 lease_change_type = OPLOCK_READ_TO_NONE;
8144                 ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n",
8145                             le32_to_cpu(lease->state),
8146                             le32_to_cpu(req->LeaseState));
8147         } else {
8148                 /* valid lease state changes */
8149                 err = STATUS_INVALID_DEVICE_STATE;
8150                 if (req->LeaseState == SMB2_LEASE_NONE_LE) {
8151                         if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
8152                                 lease_change_type = OPLOCK_WRITE_TO_NONE;
8153                         else
8154                                 lease_change_type = OPLOCK_READ_TO_NONE;
8155                 } else if (req->LeaseState & SMB2_LEASE_READ_CACHING_LE) {
8156                         if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
8157                                 lease_change_type = OPLOCK_WRITE_TO_READ;
8158                         else
8159                                 lease_change_type = OPLOCK_READ_HANDLE_TO_READ;
8160                 } else {
8161                         lease_change_type = 0;
8162                 }
8163         }
8164
8165         switch (lease_change_type) {
8166         case OPLOCK_WRITE_TO_READ:
8167                 ret = opinfo_write_to_read(opinfo);
8168                 break;
8169         case OPLOCK_READ_HANDLE_TO_READ:
8170                 ret = opinfo_read_handle_to_read(opinfo);
8171                 break;
8172         case OPLOCK_WRITE_TO_NONE:
8173                 ret = opinfo_write_to_none(opinfo);
8174                 break;
8175         case OPLOCK_READ_TO_NONE:
8176                 ret = opinfo_read_to_none(opinfo);
8177                 break;
8178         default:
8179                 ksmbd_debug(OPLOCK, "unknown lease change 0x%x -> 0x%x\n",
8180                             le32_to_cpu(lease->state),
8181                             le32_to_cpu(req->LeaseState));
8182         }
8183
8184         lease_state = lease->state;
8185         opinfo->op_state = OPLOCK_STATE_NONE;
8186         wake_up_interruptible_all(&opinfo->oplock_q);
8187         atomic_dec(&opinfo->breaking_cnt);
8188         wake_up_interruptible_all(&opinfo->oplock_brk);
8189         opinfo_put(opinfo);
8190
8191         if (ret < 0) {
8192                 rsp->hdr.Status = err;
8193                 goto err_out;
8194         }
8195
8196         rsp->StructureSize = cpu_to_le16(36);
8197         rsp->Reserved = 0;
8198         rsp->Flags = 0;
8199         memcpy(rsp->LeaseKey, req->LeaseKey, 16);
8200         rsp->LeaseState = lease_state;
8201         rsp->LeaseDuration = 0;
8202         ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_lease_ack));
8203         if (!ret)
8204                 return;
8205
8206 err_out:
8207         opinfo->op_state = OPLOCK_STATE_NONE;
8208         wake_up_interruptible_all(&opinfo->oplock_q);
8209         atomic_dec(&opinfo->breaking_cnt);
8210         wake_up_interruptible_all(&opinfo->oplock_brk);
8211
8212         opinfo_put(opinfo);
8213         smb2_set_err_rsp(work);
8214 }
8215
8216 /**
8217  * smb2_oplock_break() - dispatcher for smb2.0 and 2.1 oplock/lease break
8218  * @work:       smb work containing oplock/lease break command buffer
8219  *
8220  * Return:      0
8221  */
8222 int smb2_oplock_break(struct ksmbd_work *work)
8223 {
8224         struct smb2_oplock_break *req;
8225         struct smb2_oplock_break *rsp;
8226
8227         WORK_BUFFERS(work, req, rsp);
8228
8229         switch (le16_to_cpu(req->StructureSize)) {
8230         case OP_BREAK_STRUCT_SIZE_20:
8231                 smb20_oplock_break_ack(work);
8232                 break;
8233         case OP_BREAK_STRUCT_SIZE_21:
8234                 smb21_lease_break_ack(work);
8235                 break;
8236         default:
8237                 ksmbd_debug(OPLOCK, "invalid break cmd %d\n",
8238                             le16_to_cpu(req->StructureSize));
8239                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
8240                 smb2_set_err_rsp(work);
8241         }
8242
8243         return 0;
8244 }
8245
8246 /**
8247  * smb2_notify() - handler for smb2 notify request
8248  * @work:   smb work containing notify command buffer
8249  *
8250  * Return:      0
8251  */
8252 int smb2_notify(struct ksmbd_work *work)
8253 {
8254         struct smb2_change_notify_req *req;
8255         struct smb2_change_notify_rsp *rsp;
8256
8257         WORK_BUFFERS(work, req, rsp);
8258
8259         if (work->next_smb2_rcv_hdr_off && req->hdr.NextCommand) {
8260                 rsp->hdr.Status = STATUS_INTERNAL_ERROR;
8261                 smb2_set_err_rsp(work);
8262                 return 0;
8263         }
8264
8265         smb2_set_err_rsp(work);
8266         rsp->hdr.Status = STATUS_NOT_IMPLEMENTED;
8267         return 0;
8268 }
8269
8270 /**
8271  * smb2_is_sign_req() - handler for checking packet signing status
8272  * @work:       smb work containing notify command buffer
8273  * @command:    SMB2 command id
8274  *
8275  * Return:      true if packed is signed, false otherwise
8276  */
8277 bool smb2_is_sign_req(struct ksmbd_work *work, unsigned int command)
8278 {
8279         struct smb2_hdr *rcv_hdr2 = smb2_get_msg(work->request_buf);
8280
8281         if ((rcv_hdr2->Flags & SMB2_FLAGS_SIGNED) &&
8282             command != SMB2_NEGOTIATE_HE &&
8283             command != SMB2_SESSION_SETUP_HE &&
8284             command != SMB2_OPLOCK_BREAK_HE)
8285                 return true;
8286
8287         return false;
8288 }
8289
8290 /**
8291  * smb2_check_sign_req() - handler for req packet sign processing
8292  * @work:   smb work containing notify command buffer
8293  *
8294  * Return:      1 on success, 0 otherwise
8295  */
8296 int smb2_check_sign_req(struct ksmbd_work *work)
8297 {
8298         struct smb2_hdr *hdr;
8299         char signature_req[SMB2_SIGNATURE_SIZE];
8300         char signature[SMB2_HMACSHA256_SIZE];
8301         struct kvec iov[1];
8302         size_t len;
8303
8304         hdr = smb2_get_msg(work->request_buf);
8305         if (work->next_smb2_rcv_hdr_off)
8306                 hdr = ksmbd_req_buf_next(work);
8307
8308         if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off)
8309                 len = get_rfc1002_len(work->request_buf);
8310         else if (hdr->NextCommand)
8311                 len = le32_to_cpu(hdr->NextCommand);
8312         else
8313                 len = get_rfc1002_len(work->request_buf) -
8314                         work->next_smb2_rcv_hdr_off;
8315
8316         memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE);
8317         memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8318
8319         iov[0].iov_base = (char *)&hdr->ProtocolId;
8320         iov[0].iov_len = len;
8321
8322         if (ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, 1,
8323                                 signature))
8324                 return 0;
8325
8326         if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) {
8327                 pr_err("bad smb2 signature\n");
8328                 return 0;
8329         }
8330
8331         return 1;
8332 }
8333
8334 /**
8335  * smb2_set_sign_rsp() - handler for rsp packet sign processing
8336  * @work:   smb work containing notify command buffer
8337  *
8338  */
8339 void smb2_set_sign_rsp(struct ksmbd_work *work)
8340 {
8341         struct smb2_hdr *hdr;
8342         char signature[SMB2_HMACSHA256_SIZE];
8343         struct kvec *iov;
8344         int n_vec = 1;
8345
8346         hdr = ksmbd_resp_buf_curr(work);
8347         hdr->Flags |= SMB2_FLAGS_SIGNED;
8348         memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8349
8350         if (hdr->Command == SMB2_READ) {
8351                 iov = &work->iov[work->iov_idx - 1];
8352                 n_vec++;
8353         } else {
8354                 iov = &work->iov[work->iov_idx];
8355         }
8356
8357         if (!ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, n_vec,
8358                                  signature))
8359                 memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE);
8360 }
8361
8362 /**
8363  * smb3_check_sign_req() - handler for req packet sign processing
8364  * @work:   smb work containing notify command buffer
8365  *
8366  * Return:      1 on success, 0 otherwise
8367  */
8368 int smb3_check_sign_req(struct ksmbd_work *work)
8369 {
8370         struct ksmbd_conn *conn = work->conn;
8371         char *signing_key;
8372         struct smb2_hdr *hdr;
8373         struct channel *chann;
8374         char signature_req[SMB2_SIGNATURE_SIZE];
8375         char signature[SMB2_CMACAES_SIZE];
8376         struct kvec iov[1];
8377         size_t len;
8378
8379         hdr = smb2_get_msg(work->request_buf);
8380         if (work->next_smb2_rcv_hdr_off)
8381                 hdr = ksmbd_req_buf_next(work);
8382
8383         if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off)
8384                 len = get_rfc1002_len(work->request_buf);
8385         else if (hdr->NextCommand)
8386                 len = le32_to_cpu(hdr->NextCommand);
8387         else
8388                 len = get_rfc1002_len(work->request_buf) -
8389                         work->next_smb2_rcv_hdr_off;
8390
8391         if (le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) {
8392                 signing_key = work->sess->smb3signingkey;
8393         } else {
8394                 chann = lookup_chann_list(work->sess, conn);
8395                 if (!chann) {
8396                         return 0;
8397                 }
8398                 signing_key = chann->smb3signingkey;
8399         }
8400
8401         if (!signing_key) {
8402                 pr_err("SMB3 signing key is not generated\n");
8403                 return 0;
8404         }
8405
8406         memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE);
8407         memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8408         iov[0].iov_base = (char *)&hdr->ProtocolId;
8409         iov[0].iov_len = len;
8410
8411         if (ksmbd_sign_smb3_pdu(conn, signing_key, iov, 1, signature))
8412                 return 0;
8413
8414         if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) {
8415                 pr_err("bad smb2 signature\n");
8416                 return 0;
8417         }
8418
8419         return 1;
8420 }
8421
8422 /**
8423  * smb3_set_sign_rsp() - handler for rsp packet sign processing
8424  * @work:   smb work containing notify command buffer
8425  *
8426  */
8427 void smb3_set_sign_rsp(struct ksmbd_work *work)
8428 {
8429         struct ksmbd_conn *conn = work->conn;
8430         struct smb2_hdr *hdr;
8431         struct channel *chann;
8432         char signature[SMB2_CMACAES_SIZE];
8433         struct kvec *iov;
8434         int n_vec = 1;
8435         char *signing_key;
8436
8437         hdr = ksmbd_resp_buf_curr(work);
8438
8439         if (conn->binding == false &&
8440             le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) {
8441                 signing_key = work->sess->smb3signingkey;
8442         } else {
8443                 chann = lookup_chann_list(work->sess, work->conn);
8444                 if (!chann) {
8445                         return;
8446                 }
8447                 signing_key = chann->smb3signingkey;
8448         }
8449
8450         if (!signing_key)
8451                 return;
8452
8453         hdr->Flags |= SMB2_FLAGS_SIGNED;
8454         memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8455
8456         if (hdr->Command == SMB2_READ) {
8457                 iov = &work->iov[work->iov_idx - 1];
8458                 n_vec++;
8459         } else {
8460                 iov = &work->iov[work->iov_idx];
8461         }
8462
8463         if (!ksmbd_sign_smb3_pdu(conn, signing_key, iov, n_vec,
8464                                  signature))
8465                 memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE);
8466 }
8467
8468 /**
8469  * smb3_preauth_hash_rsp() - handler for computing preauth hash on response
8470  * @work:   smb work containing response buffer
8471  *
8472  */
8473 void smb3_preauth_hash_rsp(struct ksmbd_work *work)
8474 {
8475         struct ksmbd_conn *conn = work->conn;
8476         struct ksmbd_session *sess = work->sess;
8477         struct smb2_hdr *req, *rsp;
8478
8479         if (conn->dialect != SMB311_PROT_ID)
8480                 return;
8481
8482         WORK_BUFFERS(work, req, rsp);
8483
8484         if (le16_to_cpu(req->Command) == SMB2_NEGOTIATE_HE &&
8485             conn->preauth_info)
8486                 ksmbd_gen_preauth_integrity_hash(conn, work->response_buf,
8487                                                  conn->preauth_info->Preauth_HashValue);
8488
8489         if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE && sess) {
8490                 __u8 *hash_value;
8491
8492                 if (conn->binding) {
8493                         struct preauth_session *preauth_sess;
8494
8495                         preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id);
8496                         if (!preauth_sess)
8497                                 return;
8498                         hash_value = preauth_sess->Preauth_HashValue;
8499                 } else {
8500                         hash_value = sess->Preauth_HashValue;
8501                         if (!hash_value)
8502                                 return;
8503                 }
8504                 ksmbd_gen_preauth_integrity_hash(conn, work->response_buf,
8505                                                  hash_value);
8506         }
8507 }
8508
8509 static void fill_transform_hdr(void *tr_buf, char *old_buf, __le16 cipher_type)
8510 {
8511         struct smb2_transform_hdr *tr_hdr = tr_buf + 4;
8512         struct smb2_hdr *hdr = smb2_get_msg(old_buf);
8513         unsigned int orig_len = get_rfc1002_len(old_buf);
8514
8515         /* tr_buf must be cleared by the caller */
8516         tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
8517         tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
8518         tr_hdr->Flags = cpu_to_le16(TRANSFORM_FLAG_ENCRYPTED);
8519         if (cipher_type == SMB2_ENCRYPTION_AES128_GCM ||
8520             cipher_type == SMB2_ENCRYPTION_AES256_GCM)
8521                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
8522         else
8523                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
8524         memcpy(&tr_hdr->SessionId, &hdr->SessionId, 8);
8525         inc_rfc1001_len(tr_buf, sizeof(struct smb2_transform_hdr));
8526         inc_rfc1001_len(tr_buf, orig_len);
8527 }
8528
8529 int smb3_encrypt_resp(struct ksmbd_work *work)
8530 {
8531         struct kvec *iov = work->iov;
8532         int rc = -ENOMEM;
8533         void *tr_buf;
8534
8535         tr_buf = kzalloc(sizeof(struct smb2_transform_hdr) + 4, GFP_KERNEL);
8536         if (!tr_buf)
8537                 return rc;
8538
8539         /* fill transform header */
8540         fill_transform_hdr(tr_buf, work->response_buf, work->conn->cipher_type);
8541
8542         iov[0].iov_base = tr_buf;
8543         iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4;
8544         work->tr_buf = tr_buf;
8545
8546         return ksmbd_crypt_message(work, iov, work->iov_idx + 1, 1);
8547 }
8548
8549 bool smb3_is_transform_hdr(void *buf)
8550 {
8551         struct smb2_transform_hdr *trhdr = smb2_get_msg(buf);
8552
8553         return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
8554 }
8555
8556 int smb3_decrypt_req(struct ksmbd_work *work)
8557 {
8558         struct ksmbd_session *sess;
8559         char *buf = work->request_buf;
8560         unsigned int pdu_length = get_rfc1002_len(buf);
8561         struct kvec iov[2];
8562         int buf_data_size = pdu_length - sizeof(struct smb2_transform_hdr);
8563         struct smb2_transform_hdr *tr_hdr = smb2_get_msg(buf);
8564         int rc = 0;
8565
8566         if (pdu_length < sizeof(struct smb2_transform_hdr) ||
8567             buf_data_size < sizeof(struct smb2_hdr)) {
8568                 pr_err("Transform message is too small (%u)\n",
8569                        pdu_length);
8570                 return -ECONNABORTED;
8571         }
8572
8573         if (buf_data_size < le32_to_cpu(tr_hdr->OriginalMessageSize)) {
8574                 pr_err("Transform message is broken\n");
8575                 return -ECONNABORTED;
8576         }
8577
8578         sess = ksmbd_session_lookup_all(work->conn, le64_to_cpu(tr_hdr->SessionId));
8579         if (!sess) {
8580                 pr_err("invalid session id(%llx) in transform header\n",
8581                        le64_to_cpu(tr_hdr->SessionId));
8582                 return -ECONNABORTED;
8583         }
8584
8585         iov[0].iov_base = buf;
8586         iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4;
8587         iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr) + 4;
8588         iov[1].iov_len = buf_data_size;
8589         rc = ksmbd_crypt_message(work, iov, 2, 0);
8590         if (rc)
8591                 return rc;
8592
8593         memmove(buf + 4, iov[1].iov_base, buf_data_size);
8594         *(__be32 *)buf = cpu_to_be32(buf_data_size);
8595
8596         return rc;
8597 }
8598
8599 bool smb3_11_final_sess_setup_resp(struct ksmbd_work *work)
8600 {
8601         struct ksmbd_conn *conn = work->conn;
8602         struct ksmbd_session *sess = work->sess;
8603         struct smb2_hdr *rsp = smb2_get_msg(work->response_buf);
8604
8605         if (conn->dialect < SMB30_PROT_ID)
8606                 return false;
8607
8608         if (work->next_smb2_rcv_hdr_off)
8609                 rsp = ksmbd_resp_buf_next(work);
8610
8611         if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE &&
8612             sess->user && !user_guest(sess->user) &&
8613             rsp->Status == STATUS_SUCCESS)
8614                 return true;
8615         return false;
8616 }