fs/smb/client/smb2ops.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  *  SMB2 version specific operations
   4  *
   5  *  Copyright (c) 2012, Jeff Layton <jlayton@redhat.com>
   6  */
   7
   8 #include <linux/pagemap.h>
   9 #include <linux/vfs.h>
  10 #include <linux/falloc.h>
  11 #include <linux/scatterlist.h>
  12 #include <linux/uuid.h>
  13 #include <linux/sort.h>
  14 #include <crypto/aead.h>
  15 #include <linux/fiemap.h>
  16 #include <uapi/linux/magic.h>
  17 #include "cifsfs.h"
  18 #include "cifsglob.h"
  19 #include "smb2pdu.h"
  20 #include "smb2proto.h"
  21 #include "cifsproto.h"
  22 #include "cifs_debug.h"
  23 #include "cifs_unicode.h"
  24 #include "smb2status.h"
  25 #include "smb2glob.h"
  26 #include "cifs_ioctl.h"
  27 #include "smbdirect.h"
  28 #include "fscache.h"
  29 #include "fs_context.h"
  30 #include "cached_dir.h"
  31
  32 /* Change credits for different ops and return the total number of credits */
  33 static int
  34 change_conf(struct TCP_Server_Info *server)
  35 {
  36         server->credits += server->echo_credits + server->oplock_credits;
  37         if (server->credits > server->max_credits)
  38                 server->credits = server->max_credits;
  39         server->oplock_credits = server->echo_credits = 0;
  40         switch (server->credits) {
  41         case 0:
  42                 return 0;
  43         case 1:
  44                 server->echoes = false;
  45                 server->oplocks = false;
  46                 break;
  47         case 2:
  48                 server->echoes = true;
  49                 server->oplocks = false;
  50                 server->echo_credits = 1;
  51                 break;
  52         default:
  53                 server->echoes = true;
  54                 if (enable_oplocks) {
  55                         server->oplocks = true;
  56                         server->oplock_credits = 1;
  57                 } else
  58                         server->oplocks = false;
  59
  60                 server->echo_credits = 1;
  61         }
  62         server->credits -= server->echo_credits + server->oplock_credits;
  63         return server->credits + server->echo_credits + server->oplock_credits;
  64 }
  65
  66 static void
  67 smb2_add_credits(struct TCP_Server_Info *server,
  68                  const struct cifs_credits *credits, const int optype)
  69 {
  70         int *val, rc = -1;
  71         int scredits, in_flight;
  72         unsigned int add = credits->value;
  73         unsigned int instance = credits->instance;
  74         bool reconnect_detected = false;
  75         bool reconnect_with_invalid_credits = false;
  76
  77         spin_lock(&server->req_lock);
  78         val = server->ops->get_credits_field(server, optype);
  79
  80         /* eg found case where write overlapping reconnect messed up credits */
  81         if (((optype & CIFS_OP_MASK) == CIFS_NEG_OP) && (*val != 0))
  82                 reconnect_with_invalid_credits = true;
  83
  84         if ((instance == 0) || (instance == server->reconnect_instance))
  85                 *val += add;
  86         else
  87                 reconnect_detected = true;
  88
  89         if (*val > 65000) {
  90                 *val = 65000; /* Don't get near 64K credits, avoid srv bugs */
  91                 pr_warn_once("server overflowed SMB3 credits\n");
  92                 trace_smb3_overflow_credits(server->CurrentMid,
  93                                             server->conn_id, server->hostname, *val,
  94                                             add, server->in_flight);
  95         }
  96         WARN_ON_ONCE(server->in_flight == 0);
  97         server->in_flight--;
  98         if (server->in_flight == 0 &&
  99            ((optype & CIFS_OP_MASK) != CIFS_NEG_OP) &&
 100            ((optype & CIFS_OP_MASK) != CIFS_SESS_OP))
 101                 rc = change_conf(server);
 102         /*
 103          * Sometimes server returns 0 credits on oplock break ack - we need to
 104          * rebalance credits in this case.
 105          */
 106         else if (server->in_flight > 0 && server->oplock_credits == 0 &&
 107                  server->oplocks) {
 108                 if (server->credits > 1) {
 109                         server->credits--;
 110                         server->oplock_credits++;
 111                 }
 112         } else if ((server->in_flight > 0) && (server->oplock_credits > 3) &&
 113                    ((optype & CIFS_OP_MASK) == CIFS_OBREAK_OP))
 114                 /* if now have too many oplock credits, rebalance so don't starve normal ops */
 115                 change_conf(server);
 116
 117         scredits = *val;
 118         in_flight = server->in_flight;
 119         spin_unlock(&server->req_lock);
 120         wake_up(&server->request_q);
 121
 122         if (reconnect_detected) {
 123                 trace_smb3_reconnect_detected(server->CurrentMid,
 124                         server->conn_id, server->hostname, scredits, add, in_flight);
 125
 126                 cifs_dbg(FYI, "trying to put %d credits from the old server instance %d\n",
 127                          add, instance);
 128         }
 129
 130         if (reconnect_with_invalid_credits) {
 131                 trace_smb3_reconnect_with_invalid_credits(server->CurrentMid,
 132                         server->conn_id, server->hostname, scredits, add, in_flight);
 133                 cifs_dbg(FYI, "Negotiate operation when server credits is non-zero. Optype: %d, server credits: %d, credits added: %d\n",
 134                          optype, scredits, add);
 135         }
 136
 137         spin_lock(&server->srv_lock);
 138         if (server->tcpStatus == CifsNeedReconnect
 139             || server->tcpStatus == CifsExiting) {
 140                 spin_unlock(&server->srv_lock);
 141                 return;
 142         }
 143         spin_unlock(&server->srv_lock);
 144
 145         switch (rc) {
 146         case -1:
 147                 /* change_conf hasn't been executed */
 148                 break;
 149         case 0:
 150                 cifs_server_dbg(VFS, "Possible client or server bug - zero credits\n");
 151                 break;
 152         case 1:
 153                 cifs_server_dbg(VFS, "disabling echoes and oplocks\n");
 154                 break;
 155         case 2:
 156                 cifs_dbg(FYI, "disabling oplocks\n");
 157                 break;
 158         default:
 159                 /* change_conf rebalanced credits for different types */
 160                 break;
 161         }
 162
 163         trace_smb3_add_credits(server->CurrentMid,
 164                         server->conn_id, server->hostname, scredits, add, in_flight);
 165         cifs_dbg(FYI, "%s: added %u credits total=%d\n", __func__, add, scredits);
 166 }
 167
 168 static void
 169 smb2_set_credits(struct TCP_Server_Info *server, const int val)
 170 {
 171         int scredits, in_flight;
 172
 173         spin_lock(&server->req_lock);
 174         server->credits = val;
 175         if (val == 1) {
 176                 server->reconnect_instance++;
 177                 /*
 178                  * ChannelSequence updated for all channels in primary channel so that consistent
 179                  * across SMB3 requests sent on any channel. See MS-SMB2 3.2.4.1 and 3.2.7.1
 180                  */
 181                 if (SERVER_IS_CHAN(server))
 182                         server->primary_server->channel_sequence_num++;
 183                 else
 184                         server->channel_sequence_num++;
 185         }
 186         scredits = server->credits;
 187         in_flight = server->in_flight;
 188         spin_unlock(&server->req_lock);
 189
 190         trace_smb3_set_credits(server->CurrentMid,
 191                         server->conn_id, server->hostname, scredits, val, in_flight);
 192         cifs_dbg(FYI, "%s: set %u credits\n", __func__, val);
 193
 194         /* don't log while holding the lock */
 195         if (val == 1)
 196                 cifs_dbg(FYI, "set credits to 1 due to smb2 reconnect\n");
 197 }
 198
 199 static int *
 200 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
 201 {
 202         switch (optype) {
 203         case CIFS_ECHO_OP:
 204                 return &server->echo_credits;
 205         case CIFS_OBREAK_OP:
 206                 return &server->oplock_credits;
 207         default:
 208                 return &server->credits;
 209         }
 210 }
 211
 212 static unsigned int
 213 smb2_get_credits(struct mid_q_entry *mid)
 214 {
 215         return mid->credits_received;
 216 }
 217
 218 static int
 219 smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
 220                       unsigned int *num, struct cifs_credits *credits)
 221 {
 222         int rc = 0;
 223         unsigned int scredits, in_flight;
 224
 225         spin_lock(&server->req_lock);
 226         while (1) {
 227                 spin_unlock(&server->req_lock);
 228
 229                 spin_lock(&server->srv_lock);
 230                 if (server->tcpStatus == CifsExiting) {
 231                         spin_unlock(&server->srv_lock);
 232                         return -ENOENT;
 233                 }
 234                 spin_unlock(&server->srv_lock);
 235
 236                 spin_lock(&server->req_lock);
 237                 if (server->credits <= 0) {
 238                         spin_unlock(&server->req_lock);
 239                         cifs_num_waiters_inc(server);
 240                         rc = wait_event_killable(server->request_q,
 241                                 has_credits(server, &server->credits, 1));
 242                         cifs_num_waiters_dec(server);
 243                         if (rc)
 244                                 return rc;
 245                         spin_lock(&server->req_lock);
 246                 } else {
 247                         scredits = server->credits;
 248                         /* can deadlock with reopen */
 249                         if (scredits <= 8) {
 250                                 *num = SMB2_MAX_BUFFER_SIZE;
 251                                 credits->value = 0;
 252                                 credits->instance = 0;
 253                                 break;
 254                         }
 255
 256                         /* leave some credits for reopen and other ops */
 257                         scredits -= 8;
 258                         *num = min_t(unsigned int, size,
 259                                      scredits * SMB2_MAX_BUFFER_SIZE);
 260
 261                         credits->value =
 262                                 DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE);
 263                         credits->instance = server->reconnect_instance;
 264                         server->credits -= credits->value;
 265                         server->in_flight++;
 266                         if (server->in_flight > server->max_in_flight)
 267                                 server->max_in_flight = server->in_flight;
 268                         break;
 269                 }
 270         }
 271         scredits = server->credits;
 272         in_flight = server->in_flight;
 273         spin_unlock(&server->req_lock);
 274
 275         trace_smb3_wait_credits(server->CurrentMid,
 276                         server->conn_id, server->hostname, scredits, -(credits->value), in_flight);
 277         cifs_dbg(FYI, "%s: removed %u credits total=%d\n",
 278                         __func__, credits->value, scredits);
 279
 280         return rc;
 281 }
 282
 283 static int
 284 smb2_adjust_credits(struct TCP_Server_Info *server,
 285                     struct cifs_credits *credits,
 286                     const unsigned int payload_size)
 287 {
 288         int new_val = DIV_ROUND_UP(payload_size, SMB2_MAX_BUFFER_SIZE);
 289         int scredits, in_flight;
 290
 291         if (!credits->value || credits->value == new_val)
 292                 return 0;
 293
 294         if (credits->value < new_val) {
 295                 trace_smb3_too_many_credits(server->CurrentMid,
 296                                 server->conn_id, server->hostname, 0, credits->value - new_val, 0);
 297                 cifs_server_dbg(VFS, "request has less credits (%d) than required (%d)",
 298                                 credits->value, new_val);
 299
 300                 return -EOPNOTSUPP;
 301         }
 302
 303         spin_lock(&server->req_lock);
 304
 305         if (server->reconnect_instance != credits->instance) {
 306                 scredits = server->credits;
 307                 in_flight = server->in_flight;
 308                 spin_unlock(&server->req_lock);
 309
 310                 trace_smb3_reconnect_detected(server->CurrentMid,
 311                         server->conn_id, server->hostname, scredits,
 312                         credits->value - new_val, in_flight);
 313                 cifs_server_dbg(VFS, "trying to return %d credits to old session\n",
 314                          credits->value - new_val);
 315                 return -EAGAIN;
 316         }
 317
 318         server->credits += credits->value - new_val;
 319         scredits = server->credits;
 320         in_flight = server->in_flight;
 321         spin_unlock(&server->req_lock);
 322         wake_up(&server->request_q);
 323
 324         trace_smb3_adj_credits(server->CurrentMid,
 325                         server->conn_id, server->hostname, scredits,
 326                         credits->value - new_val, in_flight);
 327         cifs_dbg(FYI, "%s: adjust added %u credits total=%d\n",
 328                         __func__, credits->value - new_val, scredits);
 329
 330         credits->value = new_val;
 331
 332         return 0;
 333 }
 334
 335 static __u64
 336 smb2_get_next_mid(struct TCP_Server_Info *server)
 337 {
 338         __u64 mid;
 339         /* for SMB2 we need the current value */
 340         spin_lock(&server->mid_lock);
 341         mid = server->CurrentMid++;
 342         spin_unlock(&server->mid_lock);
 343         return mid;
 344 }
 345
 346 static void
 347 smb2_revert_current_mid(struct TCP_Server_Info *server, const unsigned int val)
 348 {
 349         spin_lock(&server->mid_lock);
 350         if (server->CurrentMid >= val)
 351                 server->CurrentMid -= val;
 352         spin_unlock(&server->mid_lock);
 353 }
 354
 355 static struct mid_q_entry *
 356 __smb2_find_mid(struct TCP_Server_Info *server, char *buf, bool dequeue)
 357 {
 358         struct mid_q_entry *mid;
 359         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
 360         __u64 wire_mid = le64_to_cpu(shdr->MessageId);
 361
 362         if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
 363                 cifs_server_dbg(VFS, "Encrypted frame parsing not supported yet\n");
 364                 return NULL;
 365         }
 366
 367         spin_lock(&server->mid_lock);
 368         list_for_each_entry(mid, &server->pending_mid_q, qhead) {
 369                 if ((mid->mid == wire_mid) &&
 370                     (mid->mid_state == MID_REQUEST_SUBMITTED) &&
 371                     (mid->command == shdr->Command)) {
 372                         kref_get(&mid->refcount);
 373                         if (dequeue) {
 374                                 list_del_init(&mid->qhead);
 375                                 mid->mid_flags |= MID_DELETED;
 376                         }
 377                         spin_unlock(&server->mid_lock);
 378                         return mid;
 379                 }
 380         }
 381         spin_unlock(&server->mid_lock);
 382         return NULL;
 383 }
 384
 385 static struct mid_q_entry *
 386 smb2_find_mid(struct TCP_Server_Info *server, char *buf)
 387 {
 388         return __smb2_find_mid(server, buf, false);
 389 }
 390
 391 static struct mid_q_entry *
 392 smb2_find_dequeue_mid(struct TCP_Server_Info *server, char *buf)
 393 {
 394         return __smb2_find_mid(server, buf, true);
 395 }
 396
 397 static void
 398 smb2_dump_detail(void *buf, struct TCP_Server_Info *server)
 399 {
 400 #ifdef CONFIG_CIFS_DEBUG2
 401         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
 402
 403         cifs_server_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
 404                  shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId,
 405                  shdr->Id.SyncId.ProcessId);
 406         if (!server->ops->check_message(buf, server->total_read, server)) {
 407                 cifs_server_dbg(VFS, "smb buf %p len %u\n", buf,
 408                                 server->ops->calc_smb_size(buf));
 409         }
 410 #endif
 411 }
 412
 413 static bool
 414 smb2_need_neg(struct TCP_Server_Info *server)
 415 {
 416         return server->max_read == 0;
 417 }
 418
 419 static int
 420 smb2_negotiate(const unsigned int xid,
 421                struct cifs_ses *ses,
 422                struct TCP_Server_Info *server)
 423 {
 424         int rc;
 425
 426         spin_lock(&server->mid_lock);
 427         server->CurrentMid = 0;
 428         spin_unlock(&server->mid_lock);
 429         rc = SMB2_negotiate(xid, ses, server);
 430         /* BB we probably don't need to retry with modern servers */
 431         if (rc == -EAGAIN)
 432                 rc = -EHOSTDOWN;
 433         return rc;
 434 }
 435
 436 static unsigned int
 437 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
 438 {
 439         struct TCP_Server_Info *server = tcon->ses->server;
 440         unsigned int wsize;
 441
 442         /* start with specified wsize, or default */
 443         wsize = ctx->wsize ? ctx->wsize : CIFS_DEFAULT_IOSIZE;
 444         wsize = min_t(unsigned int, wsize, server->max_write);
 445         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 446                 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
 447
 448         return wsize;
 449 }
 450
 451 static unsigned int
 452 smb3_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
 453 {
 454         struct TCP_Server_Info *server = tcon->ses->server;
 455         unsigned int wsize;
 456
 457         /* start with specified wsize, or default */
 458         wsize = ctx->wsize ? ctx->wsize : SMB3_DEFAULT_IOSIZE;
 459         wsize = min_t(unsigned int, wsize, server->max_write);
 460 #ifdef CONFIG_CIFS_SMB_DIRECT
 461         if (server->rdma) {
 462                 if (server->sign)
 463                         /*
 464                          * Account for SMB2 data transfer packet header and
 465                          * possible encryption header
 466                          */
 467                         wsize = min_t(unsigned int,
 468                                 wsize,
 469                                 server->smbd_conn->max_fragmented_send_size -
 470                                         SMB2_READWRITE_PDU_HEADER_SIZE -
 471                                         sizeof(struct smb2_transform_hdr));
 472                 else
 473                         wsize = min_t(unsigned int,
 474                                 wsize, server->smbd_conn->max_readwrite_size);
 475         }
 476 #endif
 477         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 478                 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
 479
 480         return wsize;
 481 }
 482
 483 static unsigned int
 484 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
 485 {
 486         struct TCP_Server_Info *server = tcon->ses->server;
 487         unsigned int rsize;
 488
 489         /* start with specified rsize, or default */
 490         rsize = ctx->rsize ? ctx->rsize : CIFS_DEFAULT_IOSIZE;
 491         rsize = min_t(unsigned int, rsize, server->max_read);
 492
 493         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 494                 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
 495
 496         return rsize;
 497 }
 498
 499 static unsigned int
 500 smb3_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
 501 {
 502         struct TCP_Server_Info *server = tcon->ses->server;
 503         unsigned int rsize;
 504
 505         /* start with specified rsize, or default */
 506         rsize = ctx->rsize ? ctx->rsize : SMB3_DEFAULT_IOSIZE;
 507         rsize = min_t(unsigned int, rsize, server->max_read);
 508 #ifdef CONFIG_CIFS_SMB_DIRECT
 509         if (server->rdma) {
 510                 if (server->sign)
 511                         /*
 512                          * Account for SMB2 data transfer packet header and
 513                          * possible encryption header
 514                          */
 515                         rsize = min_t(unsigned int,
 516                                 rsize,
 517                                 server->smbd_conn->max_fragmented_recv_size -
 518                                         SMB2_READWRITE_PDU_HEADER_SIZE -
 519                                         sizeof(struct smb2_transform_hdr));
 520                 else
 521                         rsize = min_t(unsigned int,
 522                                 rsize, server->smbd_conn->max_readwrite_size);
 523         }
 524 #endif
 525
 526         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 527                 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
 528
 529         return rsize;
 530 }
 531
 532 /*
 533  * compare two interfaces a and b
 534  * return 0 if everything matches.
 535  * return 1 if a is rdma capable, or rss capable, or has higher link speed
 536  * return -1 otherwise.
 537  */
 538 static int
 539 iface_cmp(struct cifs_server_iface *a, struct cifs_server_iface *b)
 540 {
 541         int cmp_ret = 0;
 542
 543         WARN_ON(!a || !b);
 544         if (a->rdma_capable == b->rdma_capable) {
 545                 if (a->rss_capable == b->rss_capable) {
 546                         if (a->speed == b->speed) {
 547                                 cmp_ret = cifs_ipaddr_cmp((struct sockaddr *) &a->sockaddr,
 548                                                           (struct sockaddr *) &b->sockaddr);
 549                                 if (!cmp_ret)
 550                                         return 0;
 551                                 else if (cmp_ret > 0)
 552                                         return 1;
 553                                 else
 554                                         return -1;
 555                         } else if (a->speed > b->speed)
 556                                 return 1;
 557                         else
 558                                 return -1;
 559                 } else if (a->rss_capable > b->rss_capable)
 560                         return 1;
 561                 else
 562                         return -1;
 563         } else if (a->rdma_capable > b->rdma_capable)
 564                 return 1;
 565         else
 566                 return -1;
 567 }
 568
 569 static int
 570 parse_server_interfaces(struct network_interface_info_ioctl_rsp *buf,
 571                         size_t buf_len, struct cifs_ses *ses, bool in_mount)
 572 {
 573         struct network_interface_info_ioctl_rsp *p;
 574         struct sockaddr_in *addr4;
 575         struct sockaddr_in6 *addr6;
 576         struct iface_info_ipv4 *p4;
 577         struct iface_info_ipv6 *p6;
 578         struct cifs_server_iface *info = NULL, *iface = NULL, *niface = NULL;
 579         struct cifs_server_iface tmp_iface;
 580         ssize_t bytes_left;
 581         size_t next = 0;
 582         int nb_iface = 0;
 583         int rc = 0, ret = 0;
 584
 585         bytes_left = buf_len;
 586         p = buf;
 587
 588         spin_lock(&ses->iface_lock);
 589         /* do not query too frequently, this time with lock held */
 590         if (ses->iface_last_update &&
 591             time_before(jiffies, ses->iface_last_update +
 592                         (SMB_INTERFACE_POLL_INTERVAL * HZ))) {
 593                 spin_unlock(&ses->iface_lock);
 594                 return 0;
 595         }
 596
 597         /*
 598          * Go through iface_list and mark them as inactive
 599          */
 600         list_for_each_entry_safe(iface, niface, &ses->iface_list,
 601                                  iface_head)
 602                 iface->is_active = 0;
 603
 604         spin_unlock(&ses->iface_lock);
 605
 606         /*
 607          * Samba server e.g. can return an empty interface list in some cases,
 608          * which would only be a problem if we were requesting multichannel
 609          */
 610         if (bytes_left == 0) {
 611                 /* avoid spamming logs every 10 minutes, so log only in mount */
 612                 if ((ses->chan_max > 1) && in_mount)
 613                         cifs_dbg(VFS,
 614                                  "multichannel not available\n"
 615                                  "Empty network interface list returned by server %s\n",
 616                                  ses->server->hostname);
 617                 rc = -EOPNOTSUPP;
 618                 ses->iface_last_update = jiffies;
 619                 goto out;
 620         }
 621
 622         while (bytes_left >= (ssize_t)sizeof(*p)) {
 623                 memset(&tmp_iface, 0, sizeof(tmp_iface));
 624                 tmp_iface.speed = le64_to_cpu(p->LinkSpeed);
 625                 tmp_iface.rdma_capable = le32_to_cpu(p->Capability & RDMA_CAPABLE) ? 1 : 0;
 626                 tmp_iface.rss_capable = le32_to_cpu(p->Capability & RSS_CAPABLE) ? 1 : 0;
 627
 628                 switch (p->Family) {
 629                 /*
 630                  * The kernel and wire socket structures have the same
 631                  * layout and use network byte order but make the
 632                  * conversion explicit in case either one changes.
 633                  */
 634                 case INTERNETWORK:
 635                         addr4 = (struct sockaddr_in *)&tmp_iface.sockaddr;
 636                         p4 = (struct iface_info_ipv4 *)p->Buffer;
 637                         addr4->sin_family = AF_INET;
 638                         memcpy(&addr4->sin_addr, &p4->IPv4Address, 4);
 639
 640                         /* [MS-SMB2] 2.2.32.5.1.1 Clients MUST ignore these */
 641                         addr4->sin_port = cpu_to_be16(CIFS_PORT);
 642
 643                         cifs_dbg(FYI, "%s: ipv4 %pI4\n", __func__,
 644                                  &addr4->sin_addr);
 645                         break;
 646                 case INTERNETWORKV6:
 647                         addr6 = (struct sockaddr_in6 *)&tmp_iface.sockaddr;
 648                         p6 = (struct iface_info_ipv6 *)p->Buffer;
 649                         addr6->sin6_family = AF_INET6;
 650                         memcpy(&addr6->sin6_addr, &p6->IPv6Address, 16);
 651
 652                         /* [MS-SMB2] 2.2.32.5.1.2 Clients MUST ignore these */
 653                         addr6->sin6_flowinfo = 0;
 654                         addr6->sin6_scope_id = 0;
 655                         addr6->sin6_port = cpu_to_be16(CIFS_PORT);
 656
 657                         cifs_dbg(FYI, "%s: ipv6 %pI6\n", __func__,
 658                                  &addr6->sin6_addr);
 659                         break;
 660                 default:
 661                         cifs_dbg(VFS,
 662                                  "%s: skipping unsupported socket family\n",
 663                                  __func__);
 664                         goto next_iface;
 665                 }
 666
 667                 /*
 668                  * The iface_list is assumed to be sorted by speed.
 669                  * Check if the new interface exists in that list.
 670                  * NEVER change iface. it could be in use.
 671                  * Add a new one instead
 672                  */
 673                 spin_lock(&ses->iface_lock);
 674                 list_for_each_entry_safe(iface, niface, &ses->iface_list,
 675                                          iface_head) {
 676                         ret = iface_cmp(iface, &tmp_iface);
 677                         if (!ret) {
 678                                 iface->is_active = 1;
 679                                 spin_unlock(&ses->iface_lock);
 680                                 goto next_iface;
 681                         } else if (ret < 0) {
 682                                 /* all remaining ifaces are slower */
 683                                 kref_get(&iface->refcount);
 684                                 break;
 685                         }
 686                 }
 687                 spin_unlock(&ses->iface_lock);
 688
 689                 /* no match. insert the entry in the list */
 690                 info = kmalloc(sizeof(struct cifs_server_iface),
 691                                GFP_KERNEL);
 692                 if (!info) {
 693                         rc = -ENOMEM;
 694                         goto out;
 695                 }
 696                 memcpy(info, &tmp_iface, sizeof(tmp_iface));
 697
 698                 /* add this new entry to the list */
 699                 kref_init(&info->refcount);
 700                 info->is_active = 1;
 701
 702                 cifs_dbg(FYI, "%s: adding iface %zu\n", __func__, ses->iface_count);
 703                 cifs_dbg(FYI, "%s: speed %zu bps\n", __func__, info->speed);
 704                 cifs_dbg(FYI, "%s: capabilities 0x%08x\n", __func__,
 705                          le32_to_cpu(p->Capability));
 706
 707                 spin_lock(&ses->iface_lock);
 708                 if (!list_entry_is_head(iface, &ses->iface_list, iface_head)) {
 709                         list_add_tail(&info->iface_head, &iface->iface_head);
 710                         kref_put(&iface->refcount, release_iface);
 711                 } else
 712                         list_add_tail(&info->iface_head, &ses->iface_list);
 713
 714                 ses->iface_count++;
 715                 spin_unlock(&ses->iface_lock);
 716 next_iface:
 717                 nb_iface++;
 718                 next = le32_to_cpu(p->Next);
 719                 if (!next) {
 720                         bytes_left -= sizeof(*p);
 721                         break;
 722                 }
 723                 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
 724                 bytes_left -= next;
 725         }
 726
 727         if (!nb_iface) {
 728                 cifs_dbg(VFS, "%s: malformed interface info\n", __func__);
 729                 rc = -EINVAL;
 730                 goto out;
 731         }
 732
 733         /* Azure rounds the buffer size up 8, to a 16 byte boundary */
 734         if ((bytes_left > 8) || p->Next)
 735                 cifs_dbg(VFS, "%s: incomplete interface info\n", __func__);
 736
 737         ses->iface_last_update = jiffies;
 738
 739 out:
 740         /*
 741          * Go through the list again and put the inactive entries
 742          */
 743         spin_lock(&ses->iface_lock);
 744         list_for_each_entry_safe(iface, niface, &ses->iface_list,
 745                                  iface_head) {
 746                 if (!iface->is_active) {
 747                         list_del(&iface->iface_head);
 748                         kref_put(&iface->refcount, release_iface);
 749                         ses->iface_count--;
 750                 }
 751         }
 752         spin_unlock(&ses->iface_lock);
 753
 754         return rc;
 755 }
 756
 757 int
 758 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon, bool in_mount)
 759 {
 760         int rc;
 761         unsigned int ret_data_len = 0;
 762         struct network_interface_info_ioctl_rsp *out_buf = NULL;
 763         struct cifs_ses *ses = tcon->ses;
 764         struct TCP_Server_Info *pserver;
 765
 766         /* do not query too frequently */
 767         if (ses->iface_last_update &&
 768             time_before(jiffies, ses->iface_last_update +
 769                         (SMB_INTERFACE_POLL_INTERVAL * HZ)))
 770                 return 0;
 771
 772         rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
 773                         FSCTL_QUERY_NETWORK_INTERFACE_INFO,
 774                         NULL /* no data input */, 0 /* no data input */,
 775                         CIFSMaxBufSize, (char **)&out_buf, &ret_data_len);
 776         if (rc == -EOPNOTSUPP) {
 777                 cifs_dbg(FYI,
 778                          "server does not support query network interfaces\n");
 779                 ret_data_len = 0;
 780         } else if (rc != 0) {
 781                 cifs_tcon_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
 782                 goto out;
 783         }
 784
 785         rc = parse_server_interfaces(out_buf, ret_data_len, ses, in_mount);
 786         if (rc)
 787                 goto out;
 788
 789         /* check if iface is still active */
 790         spin_lock(&ses->chan_lock);
 791         pserver = ses->chans[0].server;
 792         if (pserver && !cifs_chan_is_iface_active(ses, pserver)) {
 793                 spin_unlock(&ses->chan_lock);
 794                 cifs_chan_update_iface(ses, pserver);
 795                 spin_lock(&ses->chan_lock);
 796         }
 797         spin_unlock(&ses->chan_lock);
 798
 799 out:
 800         kfree(out_buf);
 801         return rc;
 802 }
 803
 804 static void
 805 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
 806               struct cifs_sb_info *cifs_sb)
 807 {
 808         int rc;
 809         __le16 srch_path = 0; /* Null - open root of share */
 810         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 811         struct cifs_open_parms oparms;
 812         struct cifs_fid fid;
 813         struct cached_fid *cfid = NULL;
 814
 815         oparms = (struct cifs_open_parms) {
 816                 .tcon = tcon,
 817                 .path = "",
 818                 .desired_access = FILE_READ_ATTRIBUTES,
 819                 .disposition = FILE_OPEN,
 820                 .create_options = cifs_create_options(cifs_sb, 0),
 821                 .fid = &fid,
 822         };
 823
 824         rc = open_cached_dir(xid, tcon, "", cifs_sb, false, &cfid);
 825         if (rc == 0)
 826                 memcpy(&fid, &cfid->fid, sizeof(struct cifs_fid));
 827         else
 828                 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
 829                                NULL, NULL);
 830         if (rc)
 831                 return;
 832
 833         SMB3_request_interfaces(xid, tcon, true /* called during  mount */);
 834
 835         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 836                         FS_ATTRIBUTE_INFORMATION);
 837         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 838                         FS_DEVICE_INFORMATION);
 839         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 840                         FS_VOLUME_INFORMATION);
 841         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 842                         FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
 843         if (cfid == NULL)
 844                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 845         else
 846                 close_cached_dir(cfid);
 847 }
 848
 849 static void
 850 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
 851               struct cifs_sb_info *cifs_sb)
 852 {
 853         int rc;
 854         __le16 srch_path = 0; /* Null - open root of share */
 855         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 856         struct cifs_open_parms oparms;
 857         struct cifs_fid fid;
 858
 859         oparms = (struct cifs_open_parms) {
 860                 .tcon = tcon,
 861                 .path = "",
 862                 .desired_access = FILE_READ_ATTRIBUTES,
 863                 .disposition = FILE_OPEN,
 864                 .create_options = cifs_create_options(cifs_sb, 0),
 865                 .fid = &fid,
 866         };
 867
 868         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
 869                        NULL, NULL);
 870         if (rc)
 871                 return;
 872
 873         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 874                         FS_ATTRIBUTE_INFORMATION);
 875         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 876                         FS_DEVICE_INFORMATION);
 877         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 878 }
 879
 880 static int
 881 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
 882                         struct cifs_sb_info *cifs_sb, const char *full_path)
 883 {
 884         __le16 *utf16_path;
 885         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 886         int err_buftype = CIFS_NO_BUFFER;
 887         struct cifs_open_parms oparms;
 888         struct kvec err_iov = {};
 889         struct cifs_fid fid;
 890         struct cached_fid *cfid;
 891         bool islink;
 892         int rc, rc2;
 893
 894         rc = open_cached_dir(xid, tcon, full_path, cifs_sb, true, &cfid);
 895         if (!rc) {
 896                 if (cfid->has_lease) {
 897                         close_cached_dir(cfid);
 898                         return 0;
 899                 }
 900                 close_cached_dir(cfid);
 901         }
 902
 903         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
 904         if (!utf16_path)
 905                 return -ENOMEM;
 906
 907         oparms = (struct cifs_open_parms) {
 908                 .tcon = tcon,
 909                 .path = full_path,
 910                 .desired_access = FILE_READ_ATTRIBUTES,
 911                 .disposition = FILE_OPEN,
 912                 .create_options = cifs_create_options(cifs_sb, 0),
 913                 .fid = &fid,
 914         };
 915
 916         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL,
 917                        &err_iov, &err_buftype);
 918         if (rc) {
 919                 struct smb2_hdr *hdr = err_iov.iov_base;
 920
 921                 if (unlikely(!hdr || err_buftype == CIFS_NO_BUFFER))
 922                         goto out;
 923
 924                 if (rc != -EREMOTE && hdr->Status == STATUS_OBJECT_NAME_INVALID) {
 925                         rc2 = cifs_inval_name_dfs_link_error(xid, tcon, cifs_sb,
 926                                                              full_path, &islink);
 927                         if (rc2) {
 928                                 rc = rc2;
 929                                 goto out;
 930                         }
 931                         if (islink)
 932                                 rc = -EREMOTE;
 933                 }
 934                 if (rc == -EREMOTE && IS_ENABLED(CONFIG_CIFS_DFS_UPCALL) && cifs_sb &&
 935                     (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_DFS))
 936                         rc = -EOPNOTSUPP;
 937                 goto out;
 938         }
 939
 940         rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 941
 942 out:
 943         free_rsp_buf(err_buftype, err_iov.iov_base);
 944         kfree(utf16_path);
 945         return rc;
 946 }
 947
 948 static int smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
 949                              struct cifs_sb_info *cifs_sb, const char *full_path,
 950                              u64 *uniqueid, struct cifs_open_info_data *data)
 951 {
 952         *uniqueid = le64_to_cpu(data->fi.IndexNumber);
 953         return 0;
 954 }
 955
 956 static int smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
 957                                 struct cifsFileInfo *cfile, struct cifs_open_info_data *data)
 958 {
 959         struct cifs_fid *fid = &cfile->fid;
 960
 961         if (cfile->symlink_target) {
 962                 data->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL);
 963                 if (!data->symlink_target)
 964                         return -ENOMEM;
 965         }
 966         return SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid, &data->fi);
 967 }
 968
 969 #ifdef CONFIG_CIFS_XATTR
 970 static ssize_t
 971 move_smb2_ea_to_cifs(char *dst, size_t dst_size,
 972                      struct smb2_file_full_ea_info *src, size_t src_size,
 973                      const unsigned char *ea_name)
 974 {
 975         int rc = 0;
 976         unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0;
 977         char *name, *value;
 978         size_t buf_size = dst_size;
 979         size_t name_len, value_len, user_name_len;
 980
 981         while (src_size > 0) {
 982                 name_len = (size_t)src->ea_name_length;
 983                 value_len = (size_t)le16_to_cpu(src->ea_value_length);
 984
 985                 if (name_len == 0)
 986                         break;
 987
 988                 if (src_size < 8 + name_len + 1 + value_len) {
 989                         cifs_dbg(FYI, "EA entry goes beyond length of list\n");
 990                         rc = -EIO;
 991                         goto out;
 992                 }
 993
 994                 name = &src->ea_data[0];
 995                 value = &src->ea_data[src->ea_name_length + 1];
 996
 997                 if (ea_name) {
 998                         if (ea_name_len == name_len &&
 999                             memcmp(ea_name, name, name_len) == 0) {
1000                                 rc = value_len;
1001                                 if (dst_size == 0)
1002                                         goto out;
1003                                 if (dst_size < value_len) {
1004                                         rc = -ERANGE;
1005                                         goto out;
1006                                 }
1007                                 memcpy(dst, value, value_len);
1008                                 goto out;
1009                         }
1010                 } else {
1011                         /* 'user.' plus a terminating null */
1012                         user_name_len = 5 + 1 + name_len;
1013
1014                         if (buf_size == 0) {
1015                                 /* skip copy - calc size only */
1016                                 rc += user_name_len;
1017                         } else if (dst_size >= user_name_len) {
1018                                 dst_size -= user_name_len;
1019                                 memcpy(dst, "user.", 5);
1020                                 dst += 5;
1021                                 memcpy(dst, src->ea_data, name_len);
1022                                 dst += name_len;
1023                                 *dst = 0;
1024                                 ++dst;
1025                                 rc += user_name_len;
1026                         } else {
1027                                 /* stop before overrun buffer */
1028                                 rc = -ERANGE;
1029                                 break;
1030                         }
1031                 }
1032
1033                 if (!src->next_entry_offset)
1034                         break;
1035
1036                 if (src_size < le32_to_cpu(src->next_entry_offset)) {
1037                         /* stop before overrun buffer */
1038                         rc = -ERANGE;
1039                         break;
1040                 }
1041                 src_size -= le32_to_cpu(src->next_entry_offset);
1042                 src = (void *)((char *)src +
1043                                le32_to_cpu(src->next_entry_offset));
1044         }
1045
1046         /* didn't find the named attribute */
1047         if (ea_name)
1048                 rc = -ENODATA;
1049
1050 out:
1051         return (ssize_t)rc;
1052 }
1053
1054 static ssize_t
1055 smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
1056                const unsigned char *path, const unsigned char *ea_name,
1057                char *ea_data, size_t buf_size,
1058                struct cifs_sb_info *cifs_sb)
1059 {
1060         int rc;
1061         struct kvec rsp_iov = {NULL, 0};
1062         int buftype = CIFS_NO_BUFFER;
1063         struct smb2_query_info_rsp *rsp;
1064         struct smb2_file_full_ea_info *info = NULL;
1065
1066         rc = smb2_query_info_compound(xid, tcon, path,
1067                                       FILE_READ_EA,
1068                                       FILE_FULL_EA_INFORMATION,
1069                                       SMB2_O_INFO_FILE,
1070                                       CIFSMaxBufSize -
1071                                       MAX_SMB2_CREATE_RESPONSE_SIZE -
1072                                       MAX_SMB2_CLOSE_RESPONSE_SIZE,
1073                                       &rsp_iov, &buftype, cifs_sb);
1074         if (rc) {
1075                 /*
1076                  * If ea_name is NULL (listxattr) and there are no EAs,
1077                  * return 0 as it's not an error. Otherwise, the specified
1078                  * ea_name was not found.
1079                  */
1080                 if (!ea_name && rc == -ENODATA)
1081                         rc = 0;
1082                 goto qeas_exit;
1083         }
1084
1085         rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
1086         rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
1087                                le32_to_cpu(rsp->OutputBufferLength),
1088                                &rsp_iov,
1089                                sizeof(struct smb2_file_full_ea_info));
1090         if (rc)
1091                 goto qeas_exit;
1092
1093         info = (struct smb2_file_full_ea_info *)(
1094                         le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
1095         rc = move_smb2_ea_to_cifs(ea_data, buf_size, info,
1096                         le32_to_cpu(rsp->OutputBufferLength), ea_name);
1097
1098  qeas_exit:
1099         free_rsp_buf(buftype, rsp_iov.iov_base);
1100         return rc;
1101 }
1102
1103 static int
1104 smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
1105             const char *path, const char *ea_name, const void *ea_value,
1106             const __u16 ea_value_len, const struct nls_table *nls_codepage,
1107             struct cifs_sb_info *cifs_sb)
1108 {
1109         struct smb2_compound_vars *vars;
1110         struct cifs_ses *ses = tcon->ses;
1111         struct TCP_Server_Info *server;
1112         struct smb_rqst *rqst;
1113         struct kvec *rsp_iov;
1114         __le16 *utf16_path = NULL;
1115         int ea_name_len = strlen(ea_name);
1116         int flags = CIFS_CP_CREATE_CLOSE_OP;
1117         int len;
1118         int resp_buftype[3];
1119         struct cifs_open_parms oparms;
1120         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1121         struct cifs_fid fid;
1122         unsigned int size[1];
1123         void *data[1];
1124         struct smb2_file_full_ea_info *ea = NULL;
1125         struct smb2_query_info_rsp *rsp;
1126         int rc, used_len = 0;
1127         int retries = 0, cur_sleep = 1;
1128
1129 replay_again:
1130         /* reinitialize for possible replay */
1131         flags = CIFS_CP_CREATE_CLOSE_OP;
1132         oplock = SMB2_OPLOCK_LEVEL_NONE;
1133         server = cifs_pick_channel(ses);
1134
1135         if (smb3_encryption_required(tcon))
1136                 flags |= CIFS_TRANSFORM_REQ;
1137
1138         if (ea_name_len > 255)
1139                 return -EINVAL;
1140
1141         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1142         if (!utf16_path)
1143                 return -ENOMEM;
1144
1145         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1146         vars = kzalloc(sizeof(*vars), GFP_KERNEL);
1147         if (!vars) {
1148                 rc = -ENOMEM;
1149                 goto out_free_path;
1150         }
1151         rqst = vars->rqst;
1152         rsp_iov = vars->rsp_iov;
1153
1154         if (ses->server->ops->query_all_EAs) {
1155                 if (!ea_value) {
1156                         rc = ses->server->ops->query_all_EAs(xid, tcon, path,
1157                                                              ea_name, NULL, 0,
1158                                                              cifs_sb);
1159                         if (rc == -ENODATA)
1160                                 goto sea_exit;
1161                 } else {
1162                         /* If we are adding a attribute we should first check
1163                          * if there will be enough space available to store
1164                          * the new EA. If not we should not add it since we
1165                          * would not be able to even read the EAs back.
1166                          */
1167                         rc = smb2_query_info_compound(xid, tcon, path,
1168                                       FILE_READ_EA,
1169                                       FILE_FULL_EA_INFORMATION,
1170                                       SMB2_O_INFO_FILE,
1171                                       CIFSMaxBufSize -
1172                                       MAX_SMB2_CREATE_RESPONSE_SIZE -
1173                                       MAX_SMB2_CLOSE_RESPONSE_SIZE,
1174                                       &rsp_iov[1], &resp_buftype[1], cifs_sb);
1175                         if (rc == 0) {
1176                                 rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1177                                 used_len = le32_to_cpu(rsp->OutputBufferLength);
1178                         }
1179                         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1180                         resp_buftype[1] = CIFS_NO_BUFFER;
1181                         memset(&rsp_iov[1], 0, sizeof(rsp_iov[1]));
1182                         rc = 0;
1183
1184                         /* Use a fudge factor of 256 bytes in case we collide
1185                          * with a different set_EAs command.
1186                          */
1187                         if (CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE -
1188                            MAX_SMB2_CLOSE_RESPONSE_SIZE - 256 <
1189                            used_len + ea_name_len + ea_value_len + 1) {
1190                                 rc = -ENOSPC;
1191                                 goto sea_exit;
1192                         }
1193                 }
1194         }
1195
1196         /* Open */
1197         rqst[0].rq_iov = vars->open_iov;
1198         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1199
1200         oparms = (struct cifs_open_parms) {
1201                 .tcon = tcon,
1202                 .path = path,
1203                 .desired_access = FILE_WRITE_EA,
1204                 .disposition = FILE_OPEN,
1205                 .create_options = cifs_create_options(cifs_sb, 0),
1206                 .fid = &fid,
1207                 .replay = !!(retries),
1208         };
1209
1210         rc = SMB2_open_init(tcon, server,
1211                             &rqst[0], &oplock, &oparms, utf16_path);
1212         if (rc)
1213                 goto sea_exit;
1214         smb2_set_next_command(tcon, &rqst[0]);
1215
1216
1217         /* Set Info */
1218         rqst[1].rq_iov = vars->si_iov;
1219         rqst[1].rq_nvec = 1;
1220
1221         len = sizeof(*ea) + ea_name_len + ea_value_len + 1;
1222         ea = kzalloc(len, GFP_KERNEL);
1223         if (ea == NULL) {
1224                 rc = -ENOMEM;
1225                 goto sea_exit;
1226         }
1227
1228         ea->ea_name_length = ea_name_len;
1229         ea->ea_value_length = cpu_to_le16(ea_value_len);
1230         memcpy(ea->ea_data, ea_name, ea_name_len + 1);
1231         memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len);
1232
1233         size[0] = len;
1234         data[0] = ea;
1235
1236         rc = SMB2_set_info_init(tcon, server,
1237                                 &rqst[1], COMPOUND_FID,
1238                                 COMPOUND_FID, current->tgid,
1239                                 FILE_FULL_EA_INFORMATION,
1240                                 SMB2_O_INFO_FILE, 0, data, size);
1241         if (rc)
1242                 goto sea_exit;
1243         smb2_set_next_command(tcon, &rqst[1]);
1244         smb2_set_related(&rqst[1]);
1245
1246         /* Close */
1247         rqst[2].rq_iov = &vars->close_iov;
1248         rqst[2].rq_nvec = 1;
1249         rc = SMB2_close_init(tcon, server,
1250                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
1251         if (rc)
1252                 goto sea_exit;
1253         smb2_set_related(&rqst[2]);
1254
1255         if (retries) {
1256                 smb2_set_replay(server, &rqst[0]);
1257                 smb2_set_replay(server, &rqst[1]);
1258                 smb2_set_replay(server, &rqst[2]);
1259         }
1260
1261         rc = compound_send_recv(xid, ses, server,
1262                                 flags, 3, rqst,
1263                                 resp_buftype, rsp_iov);
1264         /* no need to bump num_remote_opens because handle immediately closed */
1265
1266  sea_exit:
1267         kfree(ea);
1268         SMB2_open_free(&rqst[0]);
1269         SMB2_set_info_free(&rqst[1]);
1270         SMB2_close_free(&rqst[2]);
1271         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1272         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1273         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1274         kfree(vars);
1275 out_free_path:
1276         kfree(utf16_path);
1277
1278         if (is_replayable_error(rc) &&
1279             smb2_should_replay(tcon, &retries, &cur_sleep))
1280                 goto replay_again;
1281
1282         return rc;
1283 }
1284 #endif
1285
1286 static bool
1287 smb2_can_echo(struct TCP_Server_Info *server)
1288 {
1289         return server->echoes;
1290 }
1291
1292 static void
1293 smb2_clear_stats(struct cifs_tcon *tcon)
1294 {
1295         int i;
1296
1297         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
1298                 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
1299                 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
1300         }
1301 }
1302
1303 static void
1304 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
1305 {
1306         seq_puts(m, "\n\tShare Capabilities:");
1307         if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
1308                 seq_puts(m, " DFS,");
1309         if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
1310                 seq_puts(m, " CONTINUOUS AVAILABILITY,");
1311         if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
1312                 seq_puts(m, " SCALEOUT,");
1313         if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
1314                 seq_puts(m, " CLUSTER,");
1315         if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
1316                 seq_puts(m, " ASYMMETRIC,");
1317         if (tcon->capabilities == 0)
1318                 seq_puts(m, " None");
1319         if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
1320                 seq_puts(m, " Aligned,");
1321         if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
1322                 seq_puts(m, " Partition Aligned,");
1323         if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
1324                 seq_puts(m, " SSD,");
1325         if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
1326                 seq_puts(m, " TRIM-support,");
1327
1328         seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
1329         seq_printf(m, "\n\ttid: 0x%x", tcon->tid);
1330         if (tcon->perf_sector_size)
1331                 seq_printf(m, "\tOptimal sector size: 0x%x",
1332                            tcon->perf_sector_size);
1333         seq_printf(m, "\tMaximal Access: 0x%x", tcon->maximal_access);
1334 }
1335
1336 static void
1337 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
1338 {
1339         atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
1340         atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
1341
1342         /*
1343          *  Can't display SMB2_NEGOTIATE, SESSION_SETUP, LOGOFF, CANCEL and ECHO
1344          *  totals (requests sent) since those SMBs are per-session not per tcon
1345          */
1346         seq_printf(m, "\nBytes read: %llu  Bytes written: %llu",
1347                    (long long)(tcon->bytes_read),
1348                    (long long)(tcon->bytes_written));
1349         seq_printf(m, "\nOpen files: %d total (local), %d open on server",
1350                    atomic_read(&tcon->num_local_opens),
1351                    atomic_read(&tcon->num_remote_opens));
1352         seq_printf(m, "\nTreeConnects: %d total %d failed",
1353                    atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
1354                    atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
1355         seq_printf(m, "\nTreeDisconnects: %d total %d failed",
1356                    atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
1357                    atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
1358         seq_printf(m, "\nCreates: %d total %d failed",
1359                    atomic_read(&sent[SMB2_CREATE_HE]),
1360                    atomic_read(&failed[SMB2_CREATE_HE]));
1361         seq_printf(m, "\nCloses: %d total %d failed",
1362                    atomic_read(&sent[SMB2_CLOSE_HE]),
1363                    atomic_read(&failed[SMB2_CLOSE_HE]));
1364         seq_printf(m, "\nFlushes: %d total %d failed",
1365                    atomic_read(&sent[SMB2_FLUSH_HE]),
1366                    atomic_read(&failed[SMB2_FLUSH_HE]));
1367         seq_printf(m, "\nReads: %d total %d failed",
1368                    atomic_read(&sent[SMB2_READ_HE]),
1369                    atomic_read(&failed[SMB2_READ_HE]));
1370         seq_printf(m, "\nWrites: %d total %d failed",
1371                    atomic_read(&sent[SMB2_WRITE_HE]),
1372                    atomic_read(&failed[SMB2_WRITE_HE]));
1373         seq_printf(m, "\nLocks: %d total %d failed",
1374                    atomic_read(&sent[SMB2_LOCK_HE]),
1375                    atomic_read(&failed[SMB2_LOCK_HE]));
1376         seq_printf(m, "\nIOCTLs: %d total %d failed",
1377                    atomic_read(&sent[SMB2_IOCTL_HE]),
1378                    atomic_read(&failed[SMB2_IOCTL_HE]));
1379         seq_printf(m, "\nQueryDirectories: %d total %d failed",
1380                    atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
1381                    atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
1382         seq_printf(m, "\nChangeNotifies: %d total %d failed",
1383                    atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
1384                    atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
1385         seq_printf(m, "\nQueryInfos: %d total %d failed",
1386                    atomic_read(&sent[SMB2_QUERY_INFO_HE]),
1387                    atomic_read(&failed[SMB2_QUERY_INFO_HE]));
1388         seq_printf(m, "\nSetInfos: %d total %d failed",
1389                    atomic_read(&sent[SMB2_SET_INFO_HE]),
1390                    atomic_read(&failed[SMB2_SET_INFO_HE]));
1391         seq_printf(m, "\nOplockBreaks: %d sent %d failed",
1392                    atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
1393                    atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
1394 }
1395
1396 static void
1397 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
1398 {
1399         struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
1400         struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
1401
1402         cfile->fid.persistent_fid = fid->persistent_fid;
1403         cfile->fid.volatile_fid = fid->volatile_fid;
1404         cfile->fid.access = fid->access;
1405 #ifdef CONFIG_CIFS_DEBUG2
1406         cfile->fid.mid = fid->mid;
1407 #endif /* CIFS_DEBUG2 */
1408         server->ops->set_oplock_level(cinode, oplock, fid->epoch,
1409                                       &fid->purge_cache);
1410         cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
1411         memcpy(cfile->fid.create_guid, fid->create_guid, 16);
1412 }
1413
1414 static void
1415 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
1416                 struct cifs_fid *fid)
1417 {
1418         SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1419 }
1420
1421 static void
1422 smb2_close_getattr(const unsigned int xid, struct cifs_tcon *tcon,
1423                    struct cifsFileInfo *cfile)
1424 {
1425         struct smb2_file_network_open_info file_inf;
1426         struct inode *inode;
1427         int rc;
1428
1429         rc = __SMB2_close(xid, tcon, cfile->fid.persistent_fid,
1430                    cfile->fid.volatile_fid, &file_inf);
1431         if (rc)
1432                 return;
1433
1434         inode = d_inode(cfile->dentry);
1435
1436         spin_lock(&inode->i_lock);
1437         CIFS_I(inode)->time = jiffies;
1438
1439         /* Creation time should not need to be updated on close */
1440         if (file_inf.LastWriteTime)
1441                 inode_set_mtime_to_ts(inode,
1442                                       cifs_NTtimeToUnix(file_inf.LastWriteTime));
1443         if (file_inf.ChangeTime)
1444                 inode_set_ctime_to_ts(inode,
1445                                       cifs_NTtimeToUnix(file_inf.ChangeTime));
1446         if (file_inf.LastAccessTime)
1447                 inode_set_atime_to_ts(inode,
1448                                       cifs_NTtimeToUnix(file_inf.LastAccessTime));
1449
1450         /*
1451          * i_blocks is not related to (i_size / i_blksize),
1452          * but instead 512 byte (2**9) size is required for
1453          * calculating num blocks.
1454          */
1455         if (le64_to_cpu(file_inf.AllocationSize) > 4096)
1456                 inode->i_blocks =
1457                         (512 - 1 + le64_to_cpu(file_inf.AllocationSize)) >> 9;
1458
1459         /* End of file and Attributes should not have to be updated on close */
1460         spin_unlock(&inode->i_lock);
1461 }
1462
1463 static int
1464 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
1465                      u64 persistent_fid, u64 volatile_fid,
1466                      struct copychunk_ioctl *pcchunk)
1467 {
1468         int rc;
1469         unsigned int ret_data_len;
1470         struct resume_key_req *res_key;
1471
1472         rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
1473                         FSCTL_SRV_REQUEST_RESUME_KEY, NULL, 0 /* no input */,
1474                         CIFSMaxBufSize, (char **)&res_key, &ret_data_len);
1475
1476         if (rc == -EOPNOTSUPP) {
1477                 pr_warn_once("Server share %s does not support copy range\n", tcon->tree_name);
1478                 goto req_res_key_exit;
1479         } else if (rc) {
1480                 cifs_tcon_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
1481                 goto req_res_key_exit;
1482         }
1483         if (ret_data_len < sizeof(struct resume_key_req)) {
1484                 cifs_tcon_dbg(VFS, "Invalid refcopy resume key length\n");
1485                 rc = -EINVAL;
1486                 goto req_res_key_exit;
1487         }
1488         memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
1489
1490 req_res_key_exit:
1491         kfree(res_key);
1492         return rc;
1493 }
1494
1495 static int
1496 smb2_ioctl_query_info(const unsigned int xid,
1497                       struct cifs_tcon *tcon,
1498                       struct cifs_sb_info *cifs_sb,
1499                       __le16 *path, int is_dir,
1500                       unsigned long p)
1501 {
1502         struct smb2_compound_vars *vars;
1503         struct smb_rqst *rqst;
1504         struct kvec *rsp_iov;
1505         struct cifs_ses *ses = tcon->ses;
1506         struct TCP_Server_Info *server;
1507         char __user *arg = (char __user *)p;
1508         struct smb_query_info qi;
1509         struct smb_query_info __user *pqi;
1510         int rc = 0;
1511         int flags = CIFS_CP_CREATE_CLOSE_OP;
1512         struct smb2_query_info_rsp *qi_rsp = NULL;
1513         struct smb2_ioctl_rsp *io_rsp = NULL;
1514         void *buffer = NULL;
1515         int resp_buftype[3];
1516         struct cifs_open_parms oparms;
1517         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1518         struct cifs_fid fid;
1519         unsigned int size[2];
1520         void *data[2];
1521         int create_options = is_dir ? CREATE_NOT_FILE : CREATE_NOT_DIR;
1522         void (*free_req1_func)(struct smb_rqst *r);
1523         int retries = 0, cur_sleep = 1;
1524
1525 replay_again:
1526         /* reinitialize for possible replay */
1527         flags = CIFS_CP_CREATE_CLOSE_OP;
1528         oplock = SMB2_OPLOCK_LEVEL_NONE;
1529         server = cifs_pick_channel(ses);
1530
1531         vars = kzalloc(sizeof(*vars), GFP_ATOMIC);
1532         if (vars == NULL)
1533                 return -ENOMEM;
1534         rqst = &vars->rqst[0];
1535         rsp_iov = &vars->rsp_iov[0];
1536
1537         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1538
1539         if (copy_from_user(&qi, arg, sizeof(struct smb_query_info))) {
1540                 rc = -EFAULT;
1541                 goto free_vars;
1542         }
1543         if (qi.output_buffer_length > 1024) {
1544                 rc = -EINVAL;
1545                 goto free_vars;
1546         }
1547
1548         if (!ses || !server) {
1549                 rc = -EIO;
1550                 goto free_vars;
1551         }
1552
1553         if (smb3_encryption_required(tcon))
1554                 flags |= CIFS_TRANSFORM_REQ;
1555
1556         if (qi.output_buffer_length) {
1557                 buffer = memdup_user(arg + sizeof(struct smb_query_info), qi.output_buffer_length);
1558                 if (IS_ERR(buffer)) {
1559                         rc = PTR_ERR(buffer);
1560                         goto free_vars;
1561                 }
1562         }
1563
1564         /* Open */
1565         rqst[0].rq_iov = &vars->open_iov[0];
1566         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1567
1568         oparms = (struct cifs_open_parms) {
1569                 .tcon = tcon,
1570                 .disposition = FILE_OPEN,
1571                 .create_options = cifs_create_options(cifs_sb, create_options),
1572                 .fid = &fid,
1573                 .replay = !!(retries),
1574         };
1575
1576         if (qi.flags & PASSTHRU_FSCTL) {
1577                 switch (qi.info_type & FSCTL_DEVICE_ACCESS_MASK) {
1578                 case FSCTL_DEVICE_ACCESS_FILE_READ_WRITE_ACCESS:
1579                         oparms.desired_access = FILE_READ_DATA | FILE_WRITE_DATA | FILE_READ_ATTRIBUTES | SYNCHRONIZE;
1580                         break;
1581                 case FSCTL_DEVICE_ACCESS_FILE_ANY_ACCESS:
1582                         oparms.desired_access = GENERIC_ALL;
1583                         break;
1584                 case FSCTL_DEVICE_ACCESS_FILE_READ_ACCESS:
1585                         oparms.desired_access = GENERIC_READ;
1586                         break;
1587                 case FSCTL_DEVICE_ACCESS_FILE_WRITE_ACCESS:
1588                         oparms.desired_access = GENERIC_WRITE;
1589                         break;
1590                 }
1591         } else if (qi.flags & PASSTHRU_SET_INFO) {
1592                 oparms.desired_access = GENERIC_WRITE;
1593         } else {
1594                 oparms.desired_access = FILE_READ_ATTRIBUTES | READ_CONTROL;
1595         }
1596
1597         rc = SMB2_open_init(tcon, server,
1598                             &rqst[0], &oplock, &oparms, path);
1599         if (rc)
1600                 goto free_output_buffer;
1601         smb2_set_next_command(tcon, &rqst[0]);
1602
1603         /* Query */
1604         if (qi.flags & PASSTHRU_FSCTL) {
1605                 /* Can eventually relax perm check since server enforces too */
1606                 if (!capable(CAP_SYS_ADMIN)) {
1607                         rc = -EPERM;
1608                         goto free_open_req;
1609                 }
1610                 rqst[1].rq_iov = &vars->io_iov[0];
1611                 rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
1612
1613                 rc = SMB2_ioctl_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID,
1614                                      qi.info_type, buffer, qi.output_buffer_length,
1615                                      CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE -
1616                                      MAX_SMB2_CLOSE_RESPONSE_SIZE);
1617                 free_req1_func = SMB2_ioctl_free;
1618         } else if (qi.flags == PASSTHRU_SET_INFO) {
1619                 /* Can eventually relax perm check since server enforces too */
1620                 if (!capable(CAP_SYS_ADMIN)) {
1621                         rc = -EPERM;
1622                         goto free_open_req;
1623                 }
1624                 if (qi.output_buffer_length < 8) {
1625                         rc = -EINVAL;
1626                         goto free_open_req;
1627                 }
1628                 rqst[1].rq_iov = vars->si_iov;
1629                 rqst[1].rq_nvec = 1;
1630
1631                 /* MS-FSCC 2.4.13 FileEndOfFileInformation */
1632                 size[0] = 8;
1633                 data[0] = buffer;
1634
1635                 rc = SMB2_set_info_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID,
1636                                         current->tgid, FILE_END_OF_FILE_INFORMATION,
1637                                         SMB2_O_INFO_FILE, 0, data, size);
1638                 free_req1_func = SMB2_set_info_free;
1639         } else if (qi.flags == PASSTHRU_QUERY_INFO) {
1640                 rqst[1].rq_iov = &vars->qi_iov;
1641                 rqst[1].rq_nvec = 1;
1642
1643                 rc = SMB2_query_info_init(tcon, server,
1644                                   &rqst[1], COMPOUND_FID,
1645                                   COMPOUND_FID, qi.file_info_class,
1646                                   qi.info_type, qi.additional_information,
1647                                   qi.input_buffer_length,
1648                                   qi.output_buffer_length, buffer);
1649                 free_req1_func = SMB2_query_info_free;
1650         } else { /* unknown flags */
1651                 cifs_tcon_dbg(VFS, "Invalid passthru query flags: 0x%x\n",
1652                               qi.flags);
1653                 rc = -EINVAL;
1654         }
1655
1656         if (rc)
1657                 goto free_open_req;
1658         smb2_set_next_command(tcon, &rqst[1]);
1659         smb2_set_related(&rqst[1]);
1660
1661         /* Close */
1662         rqst[2].rq_iov = &vars->close_iov;
1663         rqst[2].rq_nvec = 1;
1664
1665         rc = SMB2_close_init(tcon, server,
1666                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
1667         if (rc)
1668                 goto free_req_1;
1669         smb2_set_related(&rqst[2]);
1670
1671         if (retries) {
1672                 smb2_set_replay(server, &rqst[0]);
1673                 smb2_set_replay(server, &rqst[1]);
1674                 smb2_set_replay(server, &rqst[2]);
1675         }
1676
1677         rc = compound_send_recv(xid, ses, server,
1678                                 flags, 3, rqst,
1679                                 resp_buftype, rsp_iov);
1680         if (rc)
1681                 goto out;
1682
1683         /* No need to bump num_remote_opens since handle immediately closed */
1684         if (qi.flags & PASSTHRU_FSCTL) {
1685                 pqi = (struct smb_query_info __user *)arg;
1686                 io_rsp = (struct smb2_ioctl_rsp *)rsp_iov[1].iov_base;
1687                 if (le32_to_cpu(io_rsp->OutputCount) < qi.input_buffer_length)
1688                         qi.input_buffer_length = le32_to_cpu(io_rsp->OutputCount);
1689                 if (qi.input_buffer_length > 0 &&
1690                     le32_to_cpu(io_rsp->OutputOffset) + qi.input_buffer_length
1691                     > rsp_iov[1].iov_len) {
1692                         rc = -EFAULT;
1693                         goto out;
1694                 }
1695
1696                 if (copy_to_user(&pqi->input_buffer_length,
1697                                  &qi.input_buffer_length,
1698                                  sizeof(qi.input_buffer_length))) {
1699                         rc = -EFAULT;
1700                         goto out;
1701                 }
1702
1703                 if (copy_to_user((void __user *)pqi + sizeof(struct smb_query_info),
1704                                  (const void *)io_rsp + le32_to_cpu(io_rsp->OutputOffset),
1705                                  qi.input_buffer_length))
1706                         rc = -EFAULT;
1707         } else {
1708                 pqi = (struct smb_query_info __user *)arg;
1709                 qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1710                 if (le32_to_cpu(qi_rsp->OutputBufferLength) < qi.input_buffer_length)
1711                         qi.input_buffer_length = le32_to_cpu(qi_rsp->OutputBufferLength);
1712                 if (copy_to_user(&pqi->input_buffer_length,
1713                                  &qi.input_buffer_length,
1714                                  sizeof(qi.input_buffer_length))) {
1715                         rc = -EFAULT;
1716                         goto out;
1717                 }
1718
1719                 if (copy_to_user(pqi + 1, qi_rsp->Buffer,
1720                                  qi.input_buffer_length))
1721                         rc = -EFAULT;
1722         }
1723
1724 out:
1725         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1726         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1727         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1728         SMB2_close_free(&rqst[2]);
1729 free_req_1:
1730         free_req1_func(&rqst[1]);
1731 free_open_req:
1732         SMB2_open_free(&rqst[0]);
1733 free_output_buffer:
1734         kfree(buffer);
1735 free_vars:
1736         kfree(vars);
1737
1738         if (is_replayable_error(rc) &&
1739             smb2_should_replay(tcon, &retries, &cur_sleep))
1740                 goto replay_again;
1741
1742         return rc;
1743 }
1744
1745 static ssize_t
1746 smb2_copychunk_range(const unsigned int xid,
1747                         struct cifsFileInfo *srcfile,
1748                         struct cifsFileInfo *trgtfile, u64 src_off,
1749                         u64 len, u64 dest_off)
1750 {
1751         int rc;
1752         unsigned int ret_data_len;
1753         struct copychunk_ioctl *pcchunk;
1754         struct copychunk_ioctl_rsp *retbuf = NULL;
1755         struct cifs_tcon *tcon;
1756         int chunks_copied = 0;
1757         bool chunk_sizes_updated = false;
1758         ssize_t bytes_written, total_bytes_written = 0;
1759
1760         pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
1761         if (pcchunk == NULL)
1762                 return -ENOMEM;
1763
1764         cifs_dbg(FYI, "%s: about to call request res key\n", __func__);
1765         /* Request a key from the server to identify the source of the copy */
1766         rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
1767                                 srcfile->fid.persistent_fid,
1768                                 srcfile->fid.volatile_fid, pcchunk);
1769
1770         /* Note: request_res_key sets res_key null only if rc !=0 */
1771         if (rc)
1772                 goto cchunk_out;
1773
1774         /* For now array only one chunk long, will make more flexible later */
1775         pcchunk->ChunkCount = cpu_to_le32(1);
1776         pcchunk->Reserved = 0;
1777         pcchunk->Reserved2 = 0;
1778
1779         tcon = tlink_tcon(trgtfile->tlink);
1780
1781         while (len > 0) {
1782                 pcchunk->SourceOffset = cpu_to_le64(src_off);
1783                 pcchunk->TargetOffset = cpu_to_le64(dest_off);
1784                 pcchunk->Length =
1785                         cpu_to_le32(min_t(u64, len, tcon->max_bytes_chunk));
1786
1787                 /* Request server copy to target from src identified by key */
1788                 kfree(retbuf);
1789                 retbuf = NULL;
1790                 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1791                         trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
1792                         (char *)pcchunk, sizeof(struct copychunk_ioctl),
1793                         CIFSMaxBufSize, (char **)&retbuf, &ret_data_len);
1794                 if (rc == 0) {
1795                         if (ret_data_len !=
1796                                         sizeof(struct copychunk_ioctl_rsp)) {
1797                                 cifs_tcon_dbg(VFS, "Invalid cchunk response size\n");
1798                                 rc = -EIO;
1799                                 goto cchunk_out;
1800                         }
1801                         if (retbuf->TotalBytesWritten == 0) {
1802                                 cifs_dbg(FYI, "no bytes copied\n");
1803                                 rc = -EIO;
1804                                 goto cchunk_out;
1805                         }
1806                         /*
1807                          * Check if server claimed to write more than we asked
1808                          */
1809                         if (le32_to_cpu(retbuf->TotalBytesWritten) >
1810                             le32_to_cpu(pcchunk->Length)) {
1811                                 cifs_tcon_dbg(VFS, "Invalid copy chunk response\n");
1812                                 rc = -EIO;
1813                                 goto cchunk_out;
1814                         }
1815                         if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
1816                                 cifs_tcon_dbg(VFS, "Invalid num chunks written\n");
1817                                 rc = -EIO;
1818                                 goto cchunk_out;
1819                         }
1820                         chunks_copied++;
1821
1822                         bytes_written = le32_to_cpu(retbuf->TotalBytesWritten);
1823                         src_off += bytes_written;
1824                         dest_off += bytes_written;
1825                         len -= bytes_written;
1826                         total_bytes_written += bytes_written;
1827
1828                         cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n",
1829                                 le32_to_cpu(retbuf->ChunksWritten),
1830                                 le32_to_cpu(retbuf->ChunkBytesWritten),
1831                                 bytes_written);
1832                 } else if (rc == -EINVAL) {
1833                         if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
1834                                 goto cchunk_out;
1835
1836                         cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
1837                                 le32_to_cpu(retbuf->ChunksWritten),
1838                                 le32_to_cpu(retbuf->ChunkBytesWritten),
1839                                 le32_to_cpu(retbuf->TotalBytesWritten));
1840
1841                         /*
1842                          * Check if this is the first request using these sizes,
1843                          * (ie check if copy succeed once with original sizes
1844                          * and check if the server gave us different sizes after
1845                          * we already updated max sizes on previous request).
1846                          * if not then why is the server returning an error now
1847                          */
1848                         if ((chunks_copied != 0) || chunk_sizes_updated)
1849                                 goto cchunk_out;
1850
1851                         /* Check that server is not asking us to grow size */
1852                         if (le32_to_cpu(retbuf->ChunkBytesWritten) <
1853                                         tcon->max_bytes_chunk)
1854                                 tcon->max_bytes_chunk =
1855                                         le32_to_cpu(retbuf->ChunkBytesWritten);
1856                         else
1857                                 goto cchunk_out; /* server gave us bogus size */
1858
1859                         /* No need to change MaxChunks since already set to 1 */
1860                         chunk_sizes_updated = true;
1861                 } else
1862                         goto cchunk_out;
1863         }
1864
1865 cchunk_out:
1866         kfree(pcchunk);
1867         kfree(retbuf);
1868         if (rc)
1869                 return rc;
1870         else
1871                 return total_bytes_written;
1872 }
1873
1874 static int
1875 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
1876                 struct cifs_fid *fid)
1877 {
1878         return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1879 }
1880
1881 static unsigned int
1882 smb2_read_data_offset(char *buf)
1883 {
1884         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1885
1886         return rsp->DataOffset;
1887 }
1888
1889 static unsigned int
1890 smb2_read_data_length(char *buf, bool in_remaining)
1891 {
1892         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1893
1894         if (in_remaining)
1895                 return le32_to_cpu(rsp->DataRemaining);
1896
1897         return le32_to_cpu(rsp->DataLength);
1898 }
1899
1900
1901 static int
1902 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
1903                struct cifs_io_parms *parms, unsigned int *bytes_read,
1904                char **buf, int *buf_type)
1905 {
1906         parms->persistent_fid = pfid->persistent_fid;
1907         parms->volatile_fid = pfid->volatile_fid;
1908         return SMB2_read(xid, parms, bytes_read, buf, buf_type);
1909 }
1910
1911 static int
1912 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
1913                 struct cifs_io_parms *parms, unsigned int *written,
1914                 struct kvec *iov, unsigned long nr_segs)
1915 {
1916
1917         parms->persistent_fid = pfid->persistent_fid;
1918         parms->volatile_fid = pfid->volatile_fid;
1919         return SMB2_write(xid, parms, written, iov, nr_segs);
1920 }
1921
1922 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
1923 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
1924                 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
1925 {
1926         struct cifsInodeInfo *cifsi;
1927         int rc;
1928
1929         cifsi = CIFS_I(inode);
1930
1931         /* if file already sparse don't bother setting sparse again */
1932         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
1933                 return true; /* already sparse */
1934
1935         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
1936                 return true; /* already not sparse */
1937
1938         /*
1939          * Can't check for sparse support on share the usual way via the
1940          * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
1941          * since Samba server doesn't set the flag on the share, yet
1942          * supports the set sparse FSCTL and returns sparse correctly
1943          * in the file attributes. If we fail setting sparse though we
1944          * mark that server does not support sparse files for this share
1945          * to avoid repeatedly sending the unsupported fsctl to server
1946          * if the file is repeatedly extended.
1947          */
1948         if (tcon->broken_sparse_sup)
1949                 return false;
1950
1951         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1952                         cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
1953                         &setsparse, 1, CIFSMaxBufSize, NULL, NULL);
1954         if (rc) {
1955                 tcon->broken_sparse_sup = true;
1956                 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
1957                 return false;
1958         }
1959
1960         if (setsparse)
1961                 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
1962         else
1963                 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
1964
1965         return true;
1966 }
1967
1968 static int
1969 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
1970                    struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
1971 {
1972         struct inode *inode;
1973
1974         /*
1975          * If extending file more than one page make sparse. Many Linux fs
1976          * make files sparse by default when extending via ftruncate
1977          */
1978         inode = d_inode(cfile->dentry);
1979
1980         if (!set_alloc && (size > inode->i_size + 8192)) {
1981                 __u8 set_sparse = 1;
1982
1983                 /* whether set sparse succeeds or not, extend the file */
1984                 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
1985         }
1986
1987         return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
1988                             cfile->fid.volatile_fid, cfile->pid, size);
1989 }
1990
1991 static int
1992 smb2_duplicate_extents(const unsigned int xid,
1993                         struct cifsFileInfo *srcfile,
1994                         struct cifsFileInfo *trgtfile, u64 src_off,
1995                         u64 len, u64 dest_off)
1996 {
1997         int rc;
1998         unsigned int ret_data_len;
1999         struct inode *inode;
2000         struct duplicate_extents_to_file dup_ext_buf;
2001         struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
2002
2003         /* server fileays advertise duplicate extent support with this flag */
2004         if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
2005              FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
2006                 return -EOPNOTSUPP;
2007
2008         dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
2009         dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
2010         dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
2011         dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
2012         dup_ext_buf.ByteCount = cpu_to_le64(len);
2013         cifs_dbg(FYI, "Duplicate extents: src off %lld dst off %lld len %lld\n",
2014                 src_off, dest_off, len);
2015
2016         inode = d_inode(trgtfile->dentry);
2017         if (inode->i_size < dest_off + len) {
2018                 rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
2019                 if (rc)
2020                         goto duplicate_extents_out;
2021
2022                 /*
2023                  * Although also could set plausible allocation size (i_blocks)
2024                  * here in addition to setting the file size, in reflink
2025                  * it is likely that the target file is sparse. Its allocation
2026                  * size will be queried on next revalidate, but it is important
2027                  * to make sure that file's cached size is updated immediately
2028                  */
2029                 cifs_setsize(inode, dest_off + len);
2030         }
2031         rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
2032                         trgtfile->fid.volatile_fid,
2033                         FSCTL_DUPLICATE_EXTENTS_TO_FILE,
2034                         (char *)&dup_ext_buf,
2035                         sizeof(struct duplicate_extents_to_file),
2036                         CIFSMaxBufSize, NULL,
2037                         &ret_data_len);
2038
2039         if (ret_data_len > 0)
2040                 cifs_dbg(FYI, "Non-zero response length in duplicate extents\n");
2041
2042 duplicate_extents_out:
2043         return rc;
2044 }
2045
2046 static int
2047 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
2048                    struct cifsFileInfo *cfile)
2049 {
2050         return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
2051                             cfile->fid.volatile_fid);
2052 }
2053
2054 static int
2055 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
2056                    struct cifsFileInfo *cfile)
2057 {
2058         struct fsctl_set_integrity_information_req integr_info;
2059         unsigned int ret_data_len;
2060
2061         integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
2062         integr_info.Flags = 0;
2063         integr_info.Reserved = 0;
2064
2065         return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2066                         cfile->fid.volatile_fid,
2067                         FSCTL_SET_INTEGRITY_INFORMATION,
2068                         (char *)&integr_info,
2069                         sizeof(struct fsctl_set_integrity_information_req),
2070                         CIFSMaxBufSize, NULL,
2071                         &ret_data_len);
2072
2073 }
2074
2075 /* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */
2076 #define GMT_TOKEN_SIZE 50
2077
2078 #define MIN_SNAPSHOT_ARRAY_SIZE 16 /* See MS-SMB2 section 3.3.5.15.1 */
2079
2080 /*
2081  * Input buffer contains (empty) struct smb_snapshot array with size filled in
2082  * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2
2083  */
2084 static int
2085 smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
2086                    struct cifsFileInfo *cfile, void __user *ioc_buf)
2087 {
2088         char *retbuf = NULL;
2089         unsigned int ret_data_len = 0;
2090         int rc;
2091         u32 max_response_size;
2092         struct smb_snapshot_array snapshot_in;
2093
2094         /*
2095          * On the first query to enumerate the list of snapshots available
2096          * for this volume the buffer begins with 0 (number of snapshots
2097          * which can be returned is zero since at that point we do not know
2098          * how big the buffer needs to be). On the second query,
2099          * it (ret_data_len) is set to number of snapshots so we can
2100          * know to set the maximum response size larger (see below).
2101          */
2102         if (get_user(ret_data_len, (unsigned int __user *)ioc_buf))
2103                 return -EFAULT;
2104
2105         /*
2106          * Note that for snapshot queries that servers like Azure expect that
2107          * the first query be minimal size (and just used to get the number/size
2108          * of previous versions) so response size must be specified as EXACTLY
2109          * sizeof(struct snapshot_array) which is 16 when rounded up to multiple
2110          * of eight bytes.
2111          */
2112         if (ret_data_len == 0)
2113                 max_response_size = MIN_SNAPSHOT_ARRAY_SIZE;
2114         else
2115                 max_response_size = CIFSMaxBufSize;
2116
2117         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2118                         cfile->fid.volatile_fid,
2119                         FSCTL_SRV_ENUMERATE_SNAPSHOTS,
2120                         NULL, 0 /* no input data */, max_response_size,
2121                         (char **)&retbuf,
2122                         &ret_data_len);
2123         cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n",
2124                         rc, ret_data_len);
2125         if (rc)
2126                 return rc;
2127
2128         if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) {
2129                 /* Fixup buffer */
2130                 if (copy_from_user(&snapshot_in, ioc_buf,
2131                     sizeof(struct smb_snapshot_array))) {
2132                         rc = -EFAULT;
2133                         kfree(retbuf);
2134                         return rc;
2135                 }
2136
2137                 /*
2138                  * Check for min size, ie not large enough to fit even one GMT
2139                  * token (snapshot).  On the first ioctl some users may pass in
2140                  * smaller size (or zero) to simply get the size of the array
2141                  * so the user space caller can allocate sufficient memory
2142                  * and retry the ioctl again with larger array size sufficient
2143                  * to hold all of the snapshot GMT tokens on the second try.
2144                  */
2145                 if (snapshot_in.snapshot_array_size < GMT_TOKEN_SIZE)
2146                         ret_data_len = sizeof(struct smb_snapshot_array);
2147
2148                 /*
2149                  * We return struct SRV_SNAPSHOT_ARRAY, followed by
2150                  * the snapshot array (of 50 byte GMT tokens) each
2151                  * representing an available previous version of the data
2152                  */
2153                 if (ret_data_len > (snapshot_in.snapshot_array_size +
2154                                         sizeof(struct smb_snapshot_array)))
2155                         ret_data_len = snapshot_in.snapshot_array_size +
2156                                         sizeof(struct smb_snapshot_array);
2157
2158                 if (copy_to_user(ioc_buf, retbuf, ret_data_len))
2159                         rc = -EFAULT;
2160         }
2161
2162         kfree(retbuf);
2163         return rc;
2164 }
2165
2166
2167
2168 static int
2169 smb3_notify(const unsigned int xid, struct file *pfile,
2170             void __user *ioc_buf, bool return_changes)
2171 {
2172         struct smb3_notify_info notify;
2173         struct smb3_notify_info __user *pnotify_buf;
2174         struct dentry *dentry = pfile->f_path.dentry;
2175         struct inode *inode = file_inode(pfile);
2176         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2177         struct cifs_open_parms oparms;
2178         struct cifs_fid fid;
2179         struct cifs_tcon *tcon;
2180         const unsigned char *path;
2181         char *returned_ioctl_info = NULL;
2182         void *page = alloc_dentry_path();
2183         __le16 *utf16_path = NULL;
2184         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2185         int rc = 0;
2186         __u32 ret_len = 0;
2187
2188         path = build_path_from_dentry(dentry, page);
2189         if (IS_ERR(path)) {
2190                 rc = PTR_ERR(path);
2191                 goto notify_exit;
2192         }
2193
2194         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2195         if (utf16_path == NULL) {
2196                 rc = -ENOMEM;
2197                 goto notify_exit;
2198         }
2199
2200         if (return_changes) {
2201                 if (copy_from_user(&notify, ioc_buf, sizeof(struct smb3_notify_info))) {
2202                         rc = -EFAULT;
2203                         goto notify_exit;
2204                 }
2205         } else {
2206                 if (copy_from_user(&notify, ioc_buf, sizeof(struct smb3_notify))) {
2207                         rc = -EFAULT;
2208                         goto notify_exit;
2209                 }
2210                 notify.data_len = 0;
2211         }
2212
2213         tcon = cifs_sb_master_tcon(cifs_sb);
2214         oparms = (struct cifs_open_parms) {
2215                 .tcon = tcon,
2216                 .path = path,
2217                 .desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA,
2218                 .disposition = FILE_OPEN,
2219                 .create_options = cifs_create_options(cifs_sb, 0),
2220                 .fid = &fid,
2221         };
2222
2223         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
2224                        NULL);
2225         if (rc)
2226                 goto notify_exit;
2227
2228         rc = SMB2_change_notify(xid, tcon, fid.persistent_fid, fid.volatile_fid,
2229                                 notify.watch_tree, notify.completion_filter,
2230                                 notify.data_len, &returned_ioctl_info, &ret_len);
2231
2232         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2233
2234         cifs_dbg(FYI, "change notify for path %s rc %d\n", path, rc);
2235         if (return_changes && (ret_len > 0) && (notify.data_len > 0)) {
2236                 if (ret_len > notify.data_len)
2237                         ret_len = notify.data_len;
2238                 pnotify_buf = (struct smb3_notify_info __user *)ioc_buf;
2239                 if (copy_to_user(pnotify_buf->notify_data, returned_ioctl_info, ret_len))
2240                         rc = -EFAULT;
2241                 else if (copy_to_user(&pnotify_buf->data_len, &ret_len, sizeof(ret_len)))
2242                         rc = -EFAULT;
2243         }
2244         kfree(returned_ioctl_info);
2245 notify_exit:
2246         free_dentry_path(page);
2247         kfree(utf16_path);
2248         return rc;
2249 }
2250
2251 static int
2252 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
2253                      const char *path, struct cifs_sb_info *cifs_sb,
2254                      struct cifs_fid *fid, __u16 search_flags,
2255                      struct cifs_search_info *srch_inf)
2256 {
2257         __le16 *utf16_path;
2258         struct smb_rqst rqst[2];
2259         struct kvec rsp_iov[2];
2260         int resp_buftype[2];
2261         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2262         struct kvec qd_iov[SMB2_QUERY_DIRECTORY_IOV_SIZE];
2263         int rc, flags = 0;
2264         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2265         struct cifs_open_parms oparms;
2266         struct smb2_query_directory_rsp *qd_rsp = NULL;
2267         struct smb2_create_rsp *op_rsp = NULL;
2268         struct TCP_Server_Info *server;
2269         int retries = 0, cur_sleep = 1;
2270
2271 replay_again:
2272         /* reinitialize for possible replay */
2273         flags = 0;
2274         oplock = SMB2_OPLOCK_LEVEL_NONE;
2275         server = cifs_pick_channel(tcon->ses);
2276
2277         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2278         if (!utf16_path)
2279                 return -ENOMEM;
2280
2281         if (smb3_encryption_required(tcon))
2282                 flags |= CIFS_TRANSFORM_REQ;
2283
2284         memset(rqst, 0, sizeof(rqst));
2285         resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER;
2286         memset(rsp_iov, 0, sizeof(rsp_iov));
2287
2288         /* Open */
2289         memset(&open_iov, 0, sizeof(open_iov));
2290         rqst[0].rq_iov = open_iov;
2291         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2292
2293         oparms = (struct cifs_open_parms) {
2294                 .tcon = tcon,
2295                 .path = path,
2296                 .desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA,
2297                 .disposition = FILE_OPEN,
2298                 .create_options = cifs_create_options(cifs_sb, 0),
2299                 .fid = fid,
2300                 .replay = !!(retries),
2301         };
2302
2303         rc = SMB2_open_init(tcon, server,
2304                             &rqst[0], &oplock, &oparms, utf16_path);
2305         if (rc)
2306                 goto qdf_free;
2307         smb2_set_next_command(tcon, &rqst[0]);
2308
2309         /* Query directory */
2310         srch_inf->entries_in_buffer = 0;
2311         srch_inf->index_of_last_entry = 2;
2312
2313         memset(&qd_iov, 0, sizeof(qd_iov));
2314         rqst[1].rq_iov = qd_iov;
2315         rqst[1].rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE;
2316
2317         rc = SMB2_query_directory_init(xid, tcon, server,
2318                                        &rqst[1],
2319                                        COMPOUND_FID, COMPOUND_FID,
2320                                        0, srch_inf->info_level);
2321         if (rc)
2322                 goto qdf_free;
2323
2324         smb2_set_related(&rqst[1]);
2325
2326         if (retries) {
2327                 smb2_set_replay(server, &rqst[0]);
2328                 smb2_set_replay(server, &rqst[1]);
2329         }
2330
2331         rc = compound_send_recv(xid, tcon->ses, server,
2332                                 flags, 2, rqst,
2333                                 resp_buftype, rsp_iov);
2334
2335         /* If the open failed there is nothing to do */
2336         op_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base;
2337         if (op_rsp == NULL || op_rsp->hdr.Status != STATUS_SUCCESS) {
2338                 cifs_dbg(FYI, "query_dir_first: open failed rc=%d\n", rc);
2339                 goto qdf_free;
2340         }
2341         fid->persistent_fid = op_rsp->PersistentFileId;
2342         fid->volatile_fid = op_rsp->VolatileFileId;
2343
2344         /* Anything else than ENODATA means a genuine error */
2345         if (rc && rc != -ENODATA) {
2346                 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2347                 cifs_dbg(FYI, "query_dir_first: query directory failed rc=%d\n", rc);
2348                 trace_smb3_query_dir_err(xid, fid->persistent_fid,
2349                                          tcon->tid, tcon->ses->Suid, 0, 0, rc);
2350                 goto qdf_free;
2351         }
2352
2353         atomic_inc(&tcon->num_remote_opens);
2354
2355         qd_rsp = (struct smb2_query_directory_rsp *)rsp_iov[1].iov_base;
2356         if (qd_rsp->hdr.Status == STATUS_NO_MORE_FILES) {
2357                 trace_smb3_query_dir_done(xid, fid->persistent_fid,
2358                                           tcon->tid, tcon->ses->Suid, 0, 0);
2359                 srch_inf->endOfSearch = true;
2360                 rc = 0;
2361                 goto qdf_free;
2362         }
2363
2364         rc = smb2_parse_query_directory(tcon, &rsp_iov[1], resp_buftype[1],
2365                                         srch_inf);
2366         if (rc) {
2367                 trace_smb3_query_dir_err(xid, fid->persistent_fid, tcon->tid,
2368                         tcon->ses->Suid, 0, 0, rc);
2369                 goto qdf_free;
2370         }
2371         resp_buftype[1] = CIFS_NO_BUFFER;
2372
2373         trace_smb3_query_dir_done(xid, fid->persistent_fid, tcon->tid,
2374                         tcon->ses->Suid, 0, srch_inf->entries_in_buffer);
2375
2376  qdf_free:
2377         kfree(utf16_path);
2378         SMB2_open_free(&rqst[0]);
2379         SMB2_query_directory_free(&rqst[1]);
2380         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2381         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2382
2383         if (is_replayable_error(rc) &&
2384             smb2_should_replay(tcon, &retries, &cur_sleep))
2385                 goto replay_again;
2386
2387         return rc;
2388 }
2389
2390 static int
2391 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
2392                     struct cifs_fid *fid, __u16 search_flags,
2393                     struct cifs_search_info *srch_inf)
2394 {
2395         return SMB2_query_directory(xid, tcon, fid->persistent_fid,
2396                                     fid->volatile_fid, 0, srch_inf);
2397 }
2398
2399 static int
2400 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
2401                struct cifs_fid *fid)
2402 {
2403         return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2404 }
2405
2406 /*
2407  * If we negotiate SMB2 protocol and get STATUS_PENDING - update
2408  * the number of credits and return true. Otherwise - return false.
2409  */
2410 static bool
2411 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server)
2412 {
2413         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2414         int scredits, in_flight;
2415
2416         if (shdr->Status != STATUS_PENDING)
2417                 return false;
2418
2419         if (shdr->CreditRequest) {
2420                 spin_lock(&server->req_lock);
2421                 server->credits += le16_to_cpu(shdr->CreditRequest);
2422                 scredits = server->credits;
2423                 in_flight = server->in_flight;
2424                 spin_unlock(&server->req_lock);
2425                 wake_up(&server->request_q);
2426
2427                 trace_smb3_pend_credits(server->CurrentMid,
2428                                 server->conn_id, server->hostname, scredits,
2429                                 le16_to_cpu(shdr->CreditRequest), in_flight);
2430                 cifs_dbg(FYI, "%s: status pending add %u credits total=%d\n",
2431                                 __func__, le16_to_cpu(shdr->CreditRequest), scredits);
2432         }
2433
2434         return true;
2435 }
2436
2437 static bool
2438 smb2_is_session_expired(char *buf)
2439 {
2440         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2441
2442         if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED &&
2443             shdr->Status != STATUS_USER_SESSION_DELETED)
2444                 return false;
2445
2446         trace_smb3_ses_expired(le32_to_cpu(shdr->Id.SyncId.TreeId),
2447                                le64_to_cpu(shdr->SessionId),
2448                                le16_to_cpu(shdr->Command),
2449                                le64_to_cpu(shdr->MessageId));
2450         cifs_dbg(FYI, "Session expired or deleted\n");
2451
2452         return true;
2453 }
2454
2455 static bool
2456 smb2_is_status_io_timeout(char *buf)
2457 {
2458         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2459
2460         if (shdr->Status == STATUS_IO_TIMEOUT)
2461                 return true;
2462         else
2463                 return false;
2464 }
2465
2466 static bool
2467 smb2_is_network_name_deleted(char *buf, struct TCP_Server_Info *server)
2468 {
2469         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2470         struct TCP_Server_Info *pserver;
2471         struct cifs_ses *ses;
2472         struct cifs_tcon *tcon;
2473
2474         if (shdr->Status != STATUS_NETWORK_NAME_DELETED)
2475                 return false;
2476
2477         /* If server is a channel, select the primary channel */
2478         pserver = SERVER_IS_CHAN(server) ? server->primary_server : server;
2479
2480         spin_lock(&cifs_tcp_ses_lock);
2481         list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) {
2482                 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
2483                         if (tcon->tid == le32_to_cpu(shdr->Id.SyncId.TreeId)) {
2484                                 spin_lock(&tcon->tc_lock);
2485                                 tcon->need_reconnect = true;
2486                                 spin_unlock(&tcon->tc_lock);
2487                                 spin_unlock(&cifs_tcp_ses_lock);
2488                                 pr_warn_once("Server share %s deleted.\n",
2489                                              tcon->tree_name);
2490                                 return true;
2491                         }
2492                 }
2493         }
2494         spin_unlock(&cifs_tcp_ses_lock);
2495
2496         return false;
2497 }
2498
2499 static int
2500 smb2_oplock_response(struct cifs_tcon *tcon, __u64 persistent_fid,
2501                 __u64 volatile_fid, __u16 net_fid, struct cifsInodeInfo *cinode)
2502 {
2503         if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
2504                 return SMB2_lease_break(0, tcon, cinode->lease_key,
2505                                         smb2_get_lease_state(cinode));
2506
2507         return SMB2_oplock_break(0, tcon, persistent_fid, volatile_fid,
2508                                  CIFS_CACHE_READ(cinode) ? 1 : 0);
2509 }
2510
2511 void
2512 smb2_set_replay(struct TCP_Server_Info *server, struct smb_rqst *rqst)
2513 {
2514         struct smb2_hdr *shdr;
2515
2516         if (server->dialect < SMB30_PROT_ID)
2517                 return;
2518
2519         shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base);
2520         if (shdr == NULL) {
2521                 cifs_dbg(FYI, "shdr NULL in smb2_set_related\n");
2522                 return;
2523         }
2524         shdr->Flags |= SMB2_FLAGS_REPLAY_OPERATION;
2525 }
2526
2527 void
2528 smb2_set_related(struct smb_rqst *rqst)
2529 {
2530         struct smb2_hdr *shdr;
2531
2532         shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base);
2533         if (shdr == NULL) {
2534                 cifs_dbg(FYI, "shdr NULL in smb2_set_related\n");
2535                 return;
2536         }
2537         shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
2538 }
2539
2540 char smb2_padding[7] = {0, 0, 0, 0, 0, 0, 0};
2541
2542 void
2543 smb2_set_next_command(struct cifs_tcon *tcon, struct smb_rqst *rqst)
2544 {
2545         struct smb2_hdr *shdr;
2546         struct cifs_ses *ses = tcon->ses;
2547         struct TCP_Server_Info *server = ses->server;
2548         unsigned long len = smb_rqst_len(server, rqst);
2549         int i, num_padding;
2550
2551         shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base);
2552         if (shdr == NULL) {
2553                 cifs_dbg(FYI, "shdr NULL in smb2_set_next_command\n");
2554                 return;
2555         }
2556
2557         /* SMB headers in a compound are 8 byte aligned. */
2558
2559         /* No padding needed */
2560         if (!(len & 7))
2561                 goto finished;
2562
2563         num_padding = 8 - (len & 7);
2564         if (!smb3_encryption_required(tcon)) {
2565                 /*
2566                  * If we do not have encryption then we can just add an extra
2567                  * iov for the padding.
2568                  */
2569                 rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding;
2570                 rqst->rq_iov[rqst->rq_nvec].iov_len = num_padding;
2571                 rqst->rq_nvec++;
2572                 len += num_padding;
2573         } else {
2574                 /*
2575                  * We can not add a small padding iov for the encryption case
2576                  * because the encryption framework can not handle the padding
2577                  * iovs.
2578                  * We have to flatten this into a single buffer and add
2579                  * the padding to it.
2580                  */
2581                 for (i = 1; i < rqst->rq_nvec; i++) {
2582                         memcpy(rqst->rq_iov[0].iov_base +
2583                                rqst->rq_iov[0].iov_len,
2584                                rqst->rq_iov[i].iov_base,
2585                                rqst->rq_iov[i].iov_len);
2586                         rqst->rq_iov[0].iov_len += rqst->rq_iov[i].iov_len;
2587                 }
2588                 memset(rqst->rq_iov[0].iov_base + rqst->rq_iov[0].iov_len,
2589                        0, num_padding);
2590                 rqst->rq_iov[0].iov_len += num_padding;
2591                 len += num_padding;
2592                 rqst->rq_nvec = 1;
2593         }
2594
2595  finished:
2596         shdr->NextCommand = cpu_to_le32(len);
2597 }
2598
2599 /*
2600  * helper function for exponential backoff and check if replayable
2601  */
2602 bool smb2_should_replay(struct cifs_tcon *tcon,
2603                                 int *pretries,
2604                                 int *pcur_sleep)
2605 {
2606         if (!pretries || !pcur_sleep)
2607                 return false;
2608
2609         if (tcon->retry || (*pretries)++ < tcon->ses->server->retrans) {
2610                 msleep(*pcur_sleep);
2611                 (*pcur_sleep) = ((*pcur_sleep) << 1);
2612                 if ((*pcur_sleep) > CIFS_MAX_SLEEP)
2613                         (*pcur_sleep) = CIFS_MAX_SLEEP;
2614                 return true;
2615         }
2616
2617         return false;
2618 }
2619
2620 /*
2621  * Passes the query info response back to the caller on success.
2622  * Caller need to free this with free_rsp_buf().
2623  */
2624 int
2625 smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon,
2626                          const char *path, u32 desired_access,
2627                          u32 class, u32 type, u32 output_len,
2628                          struct kvec *rsp, int *buftype,
2629                          struct cifs_sb_info *cifs_sb)
2630 {
2631         struct smb2_compound_vars *vars;
2632         struct cifs_ses *ses = tcon->ses;
2633         struct TCP_Server_Info *server;
2634         int flags = CIFS_CP_CREATE_CLOSE_OP;
2635         struct smb_rqst *rqst;
2636         int resp_buftype[3];
2637         struct kvec *rsp_iov;
2638         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2639         struct cifs_open_parms oparms;
2640         struct cifs_fid fid;
2641         int rc;
2642         __le16 *utf16_path;
2643         struct cached_fid *cfid = NULL;
2644         int retries = 0, cur_sleep = 1;
2645
2646 replay_again:
2647         /* reinitialize for possible replay */
2648         flags = CIFS_CP_CREATE_CLOSE_OP;
2649         oplock = SMB2_OPLOCK_LEVEL_NONE;
2650         server = cifs_pick_channel(ses);
2651
2652         if (!path)
2653                 path = "";
2654         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2655         if (!utf16_path)
2656                 return -ENOMEM;
2657
2658         if (smb3_encryption_required(tcon))
2659                 flags |= CIFS_TRANSFORM_REQ;
2660
2661         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
2662         vars = kzalloc(sizeof(*vars), GFP_KERNEL);
2663         if (!vars) {
2664                 rc = -ENOMEM;
2665                 goto out_free_path;
2666         }
2667         rqst = vars->rqst;
2668         rsp_iov = vars->rsp_iov;
2669
2670         /*
2671          * We can only call this for things we know are directories.
2672          */
2673         if (!strcmp(path, ""))
2674                 open_cached_dir(xid, tcon, path, cifs_sb, false,
2675                                 &cfid); /* cfid null if open dir failed */
2676
2677         rqst[0].rq_iov = vars->open_iov;
2678         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2679
2680         oparms = (struct cifs_open_parms) {
2681                 .tcon = tcon,
2682                 .path = path,
2683                 .desired_access = desired_access,
2684                 .disposition = FILE_OPEN,
2685                 .create_options = cifs_create_options(cifs_sb, 0),
2686                 .fid = &fid,
2687                 .replay = !!(retries),
2688         };
2689
2690         rc = SMB2_open_init(tcon, server,
2691                             &rqst[0], &oplock, &oparms, utf16_path);
2692         if (rc)
2693                 goto qic_exit;
2694         smb2_set_next_command(tcon, &rqst[0]);
2695
2696         rqst[1].rq_iov = &vars->qi_iov;
2697         rqst[1].rq_nvec = 1;
2698
2699         if (cfid) {
2700                 rc = SMB2_query_info_init(tcon, server,
2701                                           &rqst[1],
2702                                           cfid->fid.persistent_fid,
2703                                           cfid->fid.volatile_fid,
2704                                           class, type, 0,
2705                                           output_len, 0,
2706                                           NULL);
2707         } else {
2708                 rc = SMB2_query_info_init(tcon, server,
2709                                           &rqst[1],
2710                                           COMPOUND_FID,
2711                                           COMPOUND_FID,
2712                                           class, type, 0,
2713                                           output_len, 0,
2714                                           NULL);
2715         }
2716         if (rc)
2717                 goto qic_exit;
2718         if (!cfid) {
2719                 smb2_set_next_command(tcon, &rqst[1]);
2720                 smb2_set_related(&rqst[1]);
2721         }
2722
2723         rqst[2].rq_iov = &vars->close_iov;
2724         rqst[2].rq_nvec = 1;
2725
2726         rc = SMB2_close_init(tcon, server,
2727                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
2728         if (rc)
2729                 goto qic_exit;
2730         smb2_set_related(&rqst[2]);
2731
2732         if (retries) {
2733                 if (!cfid) {
2734                         smb2_set_replay(server, &rqst[0]);
2735                         smb2_set_replay(server, &rqst[2]);
2736                 }
2737                 smb2_set_replay(server, &rqst[1]);
2738         }
2739
2740         if (cfid) {
2741                 rc = compound_send_recv(xid, ses, server,
2742                                         flags, 1, &rqst[1],
2743                                         &resp_buftype[1], &rsp_iov[1]);
2744         } else {
2745                 rc = compound_send_recv(xid, ses, server,
2746                                         flags, 3, rqst,
2747                                         resp_buftype, rsp_iov);
2748         }
2749         if (rc) {
2750                 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2751                 if (rc == -EREMCHG) {
2752                         tcon->need_reconnect = true;
2753                         pr_warn_once("server share %s deleted\n",
2754                                      tcon->tree_name);
2755                 }
2756                 goto qic_exit;
2757         }
2758         *rsp = rsp_iov[1];
2759         *buftype = resp_buftype[1];
2760
2761  qic_exit:
2762         SMB2_open_free(&rqst[0]);
2763         SMB2_query_info_free(&rqst[1]);
2764         SMB2_close_free(&rqst[2]);
2765         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2766         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
2767         if (cfid)
2768                 close_cached_dir(cfid);
2769         kfree(vars);
2770 out_free_path:
2771         kfree(utf16_path);
2772
2773         if (is_replayable_error(rc) &&
2774             smb2_should_replay(tcon, &retries, &cur_sleep))
2775                 goto replay_again;
2776
2777         return rc;
2778 }
2779
2780 static int
2781 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2782              struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
2783 {
2784         struct smb2_query_info_rsp *rsp;
2785         struct smb2_fs_full_size_info *info = NULL;
2786         struct kvec rsp_iov = {NULL, 0};
2787         int buftype = CIFS_NO_BUFFER;
2788         int rc;
2789
2790
2791         rc = smb2_query_info_compound(xid, tcon, "",
2792                                       FILE_READ_ATTRIBUTES,
2793                                       FS_FULL_SIZE_INFORMATION,
2794                                       SMB2_O_INFO_FILESYSTEM,
2795                                       sizeof(struct smb2_fs_full_size_info),
2796                                       &rsp_iov, &buftype, cifs_sb);
2797         if (rc)
2798                 goto qfs_exit;
2799
2800         rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
2801         buf->f_type = SMB2_SUPER_MAGIC;
2802         info = (struct smb2_fs_full_size_info *)(
2803                 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
2804         rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
2805                                le32_to_cpu(rsp->OutputBufferLength),
2806                                &rsp_iov,
2807                                sizeof(struct smb2_fs_full_size_info));
2808         if (!rc)
2809                 smb2_copy_fs_info_to_kstatfs(info, buf);
2810
2811 qfs_exit:
2812         trace_smb3_qfs_done(xid, tcon->tid, tcon->ses->Suid, tcon->tree_name, rc);
2813         free_rsp_buf(buftype, rsp_iov.iov_base);
2814         return rc;
2815 }
2816
2817 static int
2818 smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2819                struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
2820 {
2821         int rc;
2822         __le16 srch_path = 0; /* Null - open root of share */
2823         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2824         struct cifs_open_parms oparms;
2825         struct cifs_fid fid;
2826
2827         if (!tcon->posix_extensions)
2828                 return smb2_queryfs(xid, tcon, cifs_sb, buf);
2829
2830         oparms = (struct cifs_open_parms) {
2831                 .tcon = tcon,
2832                 .path = "",
2833                 .desired_access = FILE_READ_ATTRIBUTES,
2834                 .disposition = FILE_OPEN,
2835                 .create_options = cifs_create_options(cifs_sb, 0),
2836                 .fid = &fid,
2837         };
2838
2839         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
2840                        NULL, NULL);
2841         if (rc)
2842                 return rc;
2843
2844         rc = SMB311_posix_qfs_info(xid, tcon, fid.persistent_fid,
2845                                    fid.volatile_fid, buf);
2846         buf->f_type = SMB2_SUPER_MAGIC;
2847         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2848         return rc;
2849 }
2850
2851 static bool
2852 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
2853 {
2854         return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
2855                ob1->fid.volatile_fid == ob2->fid.volatile_fid;
2856 }
2857
2858 static int
2859 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
2860                __u64 length, __u32 type, int lock, int unlock, bool wait)
2861 {
2862         if (unlock && !lock)
2863                 type = SMB2_LOCKFLAG_UNLOCK;
2864         return SMB2_lock(xid, tlink_tcon(cfile->tlink),
2865                          cfile->fid.persistent_fid, cfile->fid.volatile_fid,
2866                          current->tgid, length, offset, type, wait);
2867 }
2868
2869 static void
2870 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
2871 {
2872         memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
2873 }
2874
2875 static void
2876 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
2877 {
2878         memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
2879 }
2880
2881 static void
2882 smb2_new_lease_key(struct cifs_fid *fid)
2883 {
2884         generate_random_uuid(fid->lease_key);
2885 }
2886
2887 static int
2888 smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
2889                    const char *search_name,
2890                    struct dfs_info3_param **target_nodes,
2891                    unsigned int *num_of_nodes,
2892                    const struct nls_table *nls_codepage, int remap)
2893 {
2894         int rc;
2895         __le16 *utf16_path = NULL;
2896         int utf16_path_len = 0;
2897         struct cifs_tcon *tcon;
2898         struct fsctl_get_dfs_referral_req *dfs_req = NULL;
2899         struct get_dfs_referral_rsp *dfs_rsp = NULL;
2900         u32 dfs_req_size = 0, dfs_rsp_size = 0;
2901         int retry_count = 0;
2902
2903         cifs_dbg(FYI, "%s: path: %s\n", __func__, search_name);
2904
2905         /*
2906          * Try to use the IPC tcon, otherwise just use any
2907          */
2908         tcon = ses->tcon_ipc;
2909         if (tcon == NULL) {
2910                 spin_lock(&cifs_tcp_ses_lock);
2911                 tcon = list_first_entry_or_null(&ses->tcon_list,
2912                                                 struct cifs_tcon,
2913                                                 tcon_list);
2914                 if (tcon)
2915                         tcon->tc_count++;
2916                 spin_unlock(&cifs_tcp_ses_lock);
2917         }
2918
2919         if (tcon == NULL) {
2920                 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n",
2921                          ses);
2922                 rc = -ENOTCONN;
2923                 goto out;
2924         }
2925
2926         utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX,
2927                                            &utf16_path_len,
2928                                            nls_codepage, remap);
2929         if (!utf16_path) {
2930                 rc = -ENOMEM;
2931                 goto out;
2932         }
2933
2934         dfs_req_size = sizeof(*dfs_req) + utf16_path_len;
2935         dfs_req = kzalloc(dfs_req_size, GFP_KERNEL);
2936         if (!dfs_req) {
2937                 rc = -ENOMEM;
2938                 goto out;
2939         }
2940
2941         /* Highest DFS referral version understood */
2942         dfs_req->MaxReferralLevel = DFS_VERSION;
2943
2944         /* Path to resolve in an UTF-16 null-terminated string */
2945         memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len);
2946
2947         do {
2948                 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
2949                                 FSCTL_DFS_GET_REFERRALS,
2950                                 (char *)dfs_req, dfs_req_size, CIFSMaxBufSize,
2951                                 (char **)&dfs_rsp, &dfs_rsp_size);
2952                 if (!is_retryable_error(rc))
2953                         break;
2954                 usleep_range(512, 2048);
2955         } while (++retry_count < 5);
2956
2957         if (!rc && !dfs_rsp)
2958                 rc = -EIO;
2959         if (rc) {
2960                 if (!is_retryable_error(rc) && rc != -ENOENT && rc != -EOPNOTSUPP)
2961                         cifs_tcon_dbg(VFS, "%s: ioctl error: rc=%d\n", __func__, rc);
2962                 goto out;
2963         }
2964
2965         rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size,
2966                                  num_of_nodes, target_nodes,
2967                                  nls_codepage, remap, search_name,
2968                                  true /* is_unicode */);
2969         if (rc) {
2970                 cifs_tcon_dbg(VFS, "parse error in %s rc=%d\n", __func__, rc);
2971                 goto out;
2972         }
2973
2974  out:
2975         if (tcon && !tcon->ipc) {
2976                 /* ipc tcons are not refcounted */
2977                 spin_lock(&cifs_tcp_ses_lock);
2978                 tcon->tc_count--;
2979                 /* tc_count can never go negative */
2980                 WARN_ON(tcon->tc_count < 0);
2981                 spin_unlock(&cifs_tcp_ses_lock);
2982         }
2983         kfree(utf16_path);
2984         kfree(dfs_req);
2985         kfree(dfs_rsp);
2986         return rc;
2987 }
2988
2989 /* See MS-FSCC 2.1.2.6 for the 'NFS' style reparse tags */
2990 static int parse_reparse_posix(struct reparse_posix_data *buf,
2991                                struct cifs_sb_info *cifs_sb,
2992                                struct cifs_open_info_data *data)
2993 {
2994         unsigned int len;
2995         u64 type;
2996
2997         switch ((type = le64_to_cpu(buf->InodeType))) {
2998         case NFS_SPECFILE_LNK:
2999                 len = le16_to_cpu(buf->ReparseDataLength);
3000                 data->symlink_target = cifs_strndup_from_utf16(buf->DataBuffer,
3001                                                                len, true,
3002                                                                cifs_sb->local_nls);
3003                 if (!data->symlink_target)
3004                         return -ENOMEM;
3005                 convert_delimiter(data->symlink_target, '/');
3006                 cifs_dbg(FYI, "%s: target path: %s\n",
3007                          __func__, data->symlink_target);
3008                 break;
3009         case NFS_SPECFILE_CHR:
3010         case NFS_SPECFILE_BLK:
3011         case NFS_SPECFILE_FIFO:
3012         case NFS_SPECFILE_SOCK:
3013                 break;
3014         default:
3015                 cifs_dbg(VFS, "%s: unhandled inode type: 0x%llx\n",
3016                          __func__, type);
3017                 return -EOPNOTSUPP;
3018         }
3019         return 0;
3020 }
3021
3022 static int parse_reparse_symlink(struct reparse_symlink_data_buffer *sym,
3023                                  u32 plen, bool unicode,
3024                                  struct cifs_sb_info *cifs_sb,
3025                                  struct cifs_open_info_data *data)
3026 {
3027         unsigned int len;
3028         unsigned int offs;
3029
3030         /* We handle Symbolic Link reparse tag here. See: MS-FSCC 2.1.2.4 */
3031
3032         offs = le16_to_cpu(sym->SubstituteNameOffset);
3033         len = le16_to_cpu(sym->SubstituteNameLength);
3034         if (offs + 20 > plen || offs + len + 20 > plen) {
3035                 cifs_dbg(VFS, "srv returned malformed symlink buffer\n");
3036                 return -EIO;
3037         }
3038
3039         data->symlink_target = cifs_strndup_from_utf16(sym->PathBuffer + offs,
3040                                                        len, unicode,
3041                                                        cifs_sb->local_nls);
3042         if (!data->symlink_target)
3043                 return -ENOMEM;
3044
3045         convert_delimiter(data->symlink_target, '/');
3046         cifs_dbg(FYI, "%s: target path: %s\n", __func__, data->symlink_target);
3047
3048         return 0;
3049 }
3050
3051 int parse_reparse_point(struct reparse_data_buffer *buf,
3052                         u32 plen, struct cifs_sb_info *cifs_sb,
3053                         bool unicode, struct cifs_open_info_data *data)
3054 {
3055         data->reparse.buf = buf;
3056
3057         /* See MS-FSCC 2.1.2 */
3058         switch (le32_to_cpu(buf->ReparseTag)) {
3059         case IO_REPARSE_TAG_NFS:
3060                 return parse_reparse_posix((struct reparse_posix_data *)buf,
3061                                            cifs_sb, data);
3062         case IO_REPARSE_TAG_SYMLINK:
3063                 return parse_reparse_symlink(
3064                         (struct reparse_symlink_data_buffer *)buf,
3065                         plen, unicode, cifs_sb, data);
3066         case IO_REPARSE_TAG_LX_SYMLINK:
3067         case IO_REPARSE_TAG_AF_UNIX:
3068         case IO_REPARSE_TAG_LX_FIFO:
3069         case IO_REPARSE_TAG_LX_CHR:
3070         case IO_REPARSE_TAG_LX_BLK:
3071                 return 0;
3072         default:
3073                 cifs_dbg(VFS, "%s: unhandled reparse tag: 0x%08x\n",
3074                          __func__, le32_to_cpu(buf->ReparseTag));
3075                 return -EOPNOTSUPP;
3076         }
3077 }
3078
3079 static int smb2_parse_reparse_point(struct cifs_sb_info *cifs_sb,
3080                                     struct kvec *rsp_iov,
3081                                     struct cifs_open_info_data *data)
3082 {
3083         struct reparse_data_buffer *buf;
3084         struct smb2_ioctl_rsp *io = rsp_iov->iov_base;
3085         u32 plen = le32_to_cpu(io->OutputCount);
3086
3087         buf = (struct reparse_data_buffer *)((u8 *)io +
3088                                              le32_to_cpu(io->OutputOffset));
3089         return parse_reparse_point(buf, plen, cifs_sb, true, data);
3090 }
3091
3092 static struct cifs_ntsd *
3093 get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb,
3094                     const struct cifs_fid *cifsfid, u32 *pacllen, u32 info)
3095 {
3096         struct cifs_ntsd *pntsd = NULL;
3097         unsigned int xid;
3098         int rc = -EOPNOTSUPP;
3099         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3100
3101         if (IS_ERR(tlink))
3102                 return ERR_CAST(tlink);
3103
3104         xid = get_xid();
3105         cifs_dbg(FYI, "trying to get acl\n");
3106
3107         rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid,
3108                             cifsfid->volatile_fid, (void **)&pntsd, pacllen,
3109                             info);
3110         free_xid(xid);
3111
3112         cifs_put_tlink(tlink);
3113
3114         cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
3115         if (rc)
3116                 return ERR_PTR(rc);
3117         return pntsd;
3118
3119 }
3120
3121 static struct cifs_ntsd *
3122 get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb,
3123                      const char *path, u32 *pacllen, u32 info)
3124 {
3125         struct cifs_ntsd *pntsd = NULL;
3126         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3127         unsigned int xid;
3128         int rc;
3129         struct cifs_tcon *tcon;
3130         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3131         struct cifs_fid fid;
3132         struct cifs_open_parms oparms;
3133         __le16 *utf16_path;
3134
3135         cifs_dbg(FYI, "get smb3 acl for path %s\n", path);
3136         if (IS_ERR(tlink))
3137                 return ERR_CAST(tlink);
3138
3139         tcon = tlink_tcon(tlink);
3140         xid = get_xid();
3141
3142         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
3143         if (!utf16_path) {
3144                 rc = -ENOMEM;
3145                 free_xid(xid);
3146                 return ERR_PTR(rc);
3147         }
3148
3149         oparms = (struct cifs_open_parms) {
3150                 .tcon = tcon,
3151                 .path = path,
3152                 .desired_access = READ_CONTROL,
3153                 .disposition = FILE_OPEN,
3154                 /*
3155                  * When querying an ACL, even if the file is a symlink
3156                  * we want to open the source not the target, and so
3157                  * the protocol requires that the client specify this
3158                  * flag when opening a reparse point
3159                  */
3160                 .create_options = cifs_create_options(cifs_sb, 0) |
3161                                   OPEN_REPARSE_POINT,
3162                 .fid = &fid,
3163         };
3164
3165         if (info & SACL_SECINFO)
3166                 oparms.desired_access |= SYSTEM_SECURITY;
3167
3168         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
3169                        NULL);
3170         kfree(utf16_path);
3171         if (!rc) {
3172                 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3173                                     fid.volatile_fid, (void **)&pntsd, pacllen,
3174                                     info);
3175                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3176         }
3177
3178         cifs_put_tlink(tlink);
3179         free_xid(xid);
3180
3181         cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
3182         if (rc)
3183                 return ERR_PTR(rc);
3184         return pntsd;
3185 }
3186
3187 static int
3188 set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
3189                 struct inode *inode, const char *path, int aclflag)
3190 {
3191         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3192         unsigned int xid;
3193         int rc, access_flags = 0;
3194         struct cifs_tcon *tcon;
3195         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
3196         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3197         struct cifs_fid fid;
3198         struct cifs_open_parms oparms;
3199         __le16 *utf16_path;
3200
3201         cifs_dbg(FYI, "set smb3 acl for path %s\n", path);
3202         if (IS_ERR(tlink))
3203                 return PTR_ERR(tlink);
3204
3205         tcon = tlink_tcon(tlink);
3206         xid = get_xid();
3207
3208         if (aclflag & CIFS_ACL_OWNER || aclflag & CIFS_ACL_GROUP)
3209                 access_flags |= WRITE_OWNER;
3210         if (aclflag & CIFS_ACL_SACL)
3211                 access_flags |= SYSTEM_SECURITY;
3212         if (aclflag & CIFS_ACL_DACL)
3213                 access_flags |= WRITE_DAC;
3214
3215         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
3216         if (!utf16_path) {
3217                 rc = -ENOMEM;
3218                 free_xid(xid);
3219                 return rc;
3220         }
3221
3222         oparms = (struct cifs_open_parms) {
3223                 .tcon = tcon,
3224                 .desired_access = access_flags,
3225                 .create_options = cifs_create_options(cifs_sb, 0),
3226                 .disposition = FILE_OPEN,
3227                 .path = path,
3228                 .fid = &fid,
3229         };
3230
3231         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL,
3232                        NULL, NULL);
3233         kfree(utf16_path);
3234         if (!rc) {
3235                 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3236                             fid.volatile_fid, pnntsd, acllen, aclflag);
3237                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3238         }
3239
3240         cifs_put_tlink(tlink);
3241         free_xid(xid);
3242         return rc;
3243 }
3244
3245 /* Retrieve an ACL from the server */
3246 static struct cifs_ntsd *
3247 get_smb2_acl(struct cifs_sb_info *cifs_sb,
3248              struct inode *inode, const char *path,
3249              u32 *pacllen, u32 info)
3250 {
3251         struct cifs_ntsd *pntsd = NULL;
3252         struct cifsFileInfo *open_file = NULL;
3253
3254         if (inode && !(info & SACL_SECINFO))
3255                 open_file = find_readable_file(CIFS_I(inode), true);
3256         if (!open_file || (info & SACL_SECINFO))
3257                 return get_smb2_acl_by_path(cifs_sb, path, pacllen, info);
3258
3259         pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen, info);
3260         cifsFileInfo_put(open_file);
3261         return pntsd;
3262 }
3263
3264 static long smb3_zero_data(struct file *file, struct cifs_tcon *tcon,
3265                              loff_t offset, loff_t len, unsigned int xid)
3266 {
3267         struct cifsFileInfo *cfile = file->private_data;
3268         struct file_zero_data_information fsctl_buf;
3269
3270         cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3271
3272         fsctl_buf.FileOffset = cpu_to_le64(offset);
3273         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3274
3275         return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3276                           cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
3277                           (char *)&fsctl_buf,
3278                           sizeof(struct file_zero_data_information),
3279                           0, NULL, NULL);
3280 }
3281
3282 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
3283                             loff_t offset, loff_t len, bool keep_size)
3284 {
3285         struct cifs_ses *ses = tcon->ses;
3286         struct inode *inode = file_inode(file);
3287         struct cifsInodeInfo *cifsi = CIFS_I(inode);
3288         struct cifsFileInfo *cfile = file->private_data;
3289         unsigned long long new_size;
3290         long rc;
3291         unsigned int xid;
3292
3293         xid = get_xid();
3294
3295         trace_smb3_zero_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3296                               ses->Suid, offset, len);
3297
3298         inode_lock(inode);
3299         filemap_invalidate_lock(inode->i_mapping);
3300
3301         /*
3302          * We zero the range through ioctl, so we need remove the page caches
3303          * first, otherwise the data may be inconsistent with the server.
3304          */
3305         truncate_pagecache_range(inode, offset, offset + len - 1);
3306
3307         /* if file not oplocked can't be sure whether asking to extend size */
3308         rc = -EOPNOTSUPP;
3309         if (keep_size == false && !CIFS_CACHE_READ(cifsi))
3310                 goto zero_range_exit;
3311
3312         rc = smb3_zero_data(file, tcon, offset, len, xid);
3313         if (rc < 0)
3314                 goto zero_range_exit;
3315
3316         /*
3317          * do we also need to change the size of the file?
3318          */
3319         new_size = offset + len;
3320         if (keep_size == false && (unsigned long long)i_size_read(inode) < new_size) {
3321                 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3322                                   cfile->fid.volatile_fid, cfile->pid, new_size);
3323                 if (rc >= 0) {
3324                         truncate_setsize(inode, new_size);
3325                         netfs_resize_file(&cifsi->netfs, new_size, true);
3326                         if (offset < cifsi->netfs.zero_point)
3327                                 cifsi->netfs.zero_point = offset;
3328                         fscache_resize_cookie(cifs_inode_cookie(inode), new_size);
3329                 }
3330         }
3331
3332  zero_range_exit:
3333         filemap_invalidate_unlock(inode->i_mapping);
3334         inode_unlock(inode);
3335         free_xid(xid);
3336         if (rc)
3337                 trace_smb3_zero_err(xid, cfile->fid.persistent_fid, tcon->tid,
3338                               ses->Suid, offset, len, rc);
3339         else
3340                 trace_smb3_zero_done(xid, cfile->fid.persistent_fid, tcon->tid,
3341                               ses->Suid, offset, len);
3342         return rc;
3343 }
3344
3345 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
3346                             loff_t offset, loff_t len)
3347 {
3348         struct inode *inode = file_inode(file);
3349         struct cifsFileInfo *cfile = file->private_data;
3350         struct file_zero_data_information fsctl_buf;
3351         long rc;
3352         unsigned int xid;
3353         __u8 set_sparse = 1;
3354
3355         xid = get_xid();
3356
3357         inode_lock(inode);
3358         /* Need to make file sparse, if not already, before freeing range. */
3359         /* Consider adding equivalent for compressed since it could also work */
3360         if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) {
3361                 rc = -EOPNOTSUPP;
3362                 goto out;
3363         }
3364
3365         filemap_invalidate_lock(inode->i_mapping);
3366         /*
3367          * We implement the punch hole through ioctl, so we need remove the page
3368          * caches first, otherwise the data may be inconsistent with the server.
3369          */
3370         truncate_pagecache_range(inode, offset, offset + len - 1);
3371
3372         cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3373
3374         fsctl_buf.FileOffset = cpu_to_le64(offset);
3375         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3376
3377         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3378                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
3379                         (char *)&fsctl_buf,
3380                         sizeof(struct file_zero_data_information),
3381                         CIFSMaxBufSize, NULL, NULL);
3382         filemap_invalidate_unlock(inode->i_mapping);
3383 out:
3384         inode_unlock(inode);
3385         free_xid(xid);
3386         return rc;
3387 }
3388
3389 static int smb3_simple_fallocate_write_range(unsigned int xid,
3390                                              struct cifs_tcon *tcon,
3391                                              struct cifsFileInfo *cfile,
3392                                              loff_t off, loff_t len,
3393                                              char *buf)
3394 {
3395         struct cifs_io_parms io_parms = {0};
3396         int nbytes;
3397         int rc = 0;
3398         struct kvec iov[2];
3399
3400         io_parms.netfid = cfile->fid.netfid;
3401         io_parms.pid = current->tgid;
3402         io_parms.tcon = tcon;
3403         io_parms.persistent_fid = cfile->fid.persistent_fid;
3404         io_parms.volatile_fid = cfile->fid.volatile_fid;
3405
3406         while (len) {
3407                 io_parms.offset = off;
3408                 io_parms.length = len;
3409                 if (io_parms.length > SMB2_MAX_BUFFER_SIZE)
3410                         io_parms.length = SMB2_MAX_BUFFER_SIZE;
3411                 /* iov[0] is reserved for smb header */
3412                 iov[1].iov_base = buf;
3413                 iov[1].iov_len = io_parms.length;
3414                 rc = SMB2_write(xid, &io_parms, &nbytes, iov, 1);
3415                 if (rc)
3416                         break;
3417                 if (nbytes > len)
3418                         return -EINVAL;
3419                 buf += nbytes;
3420                 off += nbytes;
3421                 len -= nbytes;
3422         }
3423         return rc;
3424 }
3425
3426 static int smb3_simple_fallocate_range(unsigned int xid,
3427                                        struct cifs_tcon *tcon,
3428                                        struct cifsFileInfo *cfile,
3429                                        loff_t off, loff_t len)
3430 {
3431         struct file_allocated_range_buffer in_data, *out_data = NULL, *tmp_data;
3432         u32 out_data_len;
3433         char *buf = NULL;
3434         loff_t l;
3435         int rc;
3436
3437         in_data.file_offset = cpu_to_le64(off);
3438         in_data.length = cpu_to_le64(len);
3439         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3440                         cfile->fid.volatile_fid,
3441                         FSCTL_QUERY_ALLOCATED_RANGES,
3442                         (char *)&in_data, sizeof(in_data),
3443                         1024 * sizeof(struct file_allocated_range_buffer),
3444                         (char **)&out_data, &out_data_len);
3445         if (rc)
3446                 goto out;
3447
3448         buf = kzalloc(1024 * 1024, GFP_KERNEL);
3449         if (buf == NULL) {
3450                 rc = -ENOMEM;
3451                 goto out;
3452         }
3453
3454         tmp_data = out_data;
3455         while (len) {
3456                 /*
3457                  * The rest of the region is unmapped so write it all.
3458                  */
3459                 if (out_data_len == 0) {
3460                         rc = smb3_simple_fallocate_write_range(xid, tcon,
3461                                                cfile, off, len, buf);
3462                         goto out;
3463                 }
3464
3465                 if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3466                         rc = -EINVAL;
3467                         goto out;
3468                 }
3469
3470                 if (off < le64_to_cpu(tmp_data->file_offset)) {
3471                         /*
3472                          * We are at a hole. Write until the end of the region
3473                          * or until the next allocated data,
3474                          * whichever comes next.
3475                          */
3476                         l = le64_to_cpu(tmp_data->file_offset) - off;
3477                         if (len < l)
3478                                 l = len;
3479                         rc = smb3_simple_fallocate_write_range(xid, tcon,
3480                                                cfile, off, l, buf);
3481                         if (rc)
3482                                 goto out;
3483                         off = off + l;
3484                         len = len - l;
3485                         if (len == 0)
3486                                 goto out;
3487                 }
3488                 /*
3489                  * We are at a section of allocated data, just skip forward
3490                  * until the end of the data or the end of the region
3491                  * we are supposed to fallocate, whichever comes first.
3492                  */
3493                 l = le64_to_cpu(tmp_data->length);
3494                 if (len < l)
3495                         l = len;
3496                 off += l;
3497                 len -= l;
3498
3499                 tmp_data = &tmp_data[1];
3500                 out_data_len -= sizeof(struct file_allocated_range_buffer);
3501         }
3502
3503  out:
3504         kfree(out_data);
3505         kfree(buf);
3506         return rc;
3507 }
3508
3509
3510 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
3511                             loff_t off, loff_t len, bool keep_size)
3512 {
3513         struct inode *inode;
3514         struct cifsInodeInfo *cifsi;
3515         struct cifsFileInfo *cfile = file->private_data;
3516         long rc = -EOPNOTSUPP;
3517         unsigned int xid;
3518         loff_t new_eof;
3519
3520         xid = get_xid();
3521
3522         inode = d_inode(cfile->dentry);
3523         cifsi = CIFS_I(inode);
3524
3525         trace_smb3_falloc_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3526                                 tcon->ses->Suid, off, len);
3527         /* if file not oplocked can't be sure whether asking to extend size */
3528         if (!CIFS_CACHE_READ(cifsi))
3529                 if (keep_size == false) {
3530                         trace_smb3_falloc_err(xid, cfile->fid.persistent_fid,
3531                                 tcon->tid, tcon->ses->Suid, off, len, rc);
3532                         free_xid(xid);
3533                         return rc;
3534                 }
3535
3536         /*
3537          * Extending the file
3538          */
3539         if ((keep_size == false) && i_size_read(inode) < off + len) {
3540                 rc = inode_newsize_ok(inode, off + len);
3541                 if (rc)
3542                         goto out;
3543
3544                 if (cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)
3545                         smb2_set_sparse(xid, tcon, cfile, inode, false);
3546
3547                 new_eof = off + len;
3548                 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3549                                   cfile->fid.volatile_fid, cfile->pid, new_eof);
3550                 if (rc == 0) {
3551                         netfs_resize_file(&cifsi->netfs, new_eof, true);
3552                         cifs_setsize(inode, new_eof);
3553                         cifs_truncate_page(inode->i_mapping, inode->i_size);
3554                         truncate_setsize(inode, new_eof);
3555                 }
3556                 goto out;
3557         }
3558
3559         /*
3560          * Files are non-sparse by default so falloc may be a no-op
3561          * Must check if file sparse. If not sparse, and since we are not
3562          * extending then no need to do anything since file already allocated
3563          */
3564         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
3565                 rc = 0;
3566                 goto out;
3567         }
3568
3569         if (keep_size == true) {
3570                 /*
3571                  * We can not preallocate pages beyond the end of the file
3572                  * in SMB2
3573                  */
3574                 if (off >= i_size_read(inode)) {
3575                         rc = 0;
3576                         goto out;
3577                 }
3578                 /*
3579                  * For fallocates that are partially beyond the end of file,
3580                  * clamp len so we only fallocate up to the end of file.
3581                  */
3582                 if (off + len > i_size_read(inode)) {
3583                         len = i_size_read(inode) - off;
3584                 }
3585         }
3586
3587         if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
3588                 /*
3589                  * At this point, we are trying to fallocate an internal
3590                  * regions of a sparse file. Since smb2 does not have a
3591                  * fallocate command we have two otions on how to emulate this.
3592                  * We can either turn the entire file to become non-sparse
3593                  * which we only do if the fallocate is for virtually
3594                  * the whole file,  or we can overwrite the region with zeroes
3595                  * using SMB2_write, which could be prohibitevly expensive
3596                  * if len is large.
3597                  */
3598                 /*
3599                  * We are only trying to fallocate a small region so
3600                  * just write it with zero.
3601                  */
3602                 if (len <= 1024 * 1024) {
3603                         rc = smb3_simple_fallocate_range(xid, tcon, cfile,
3604                                                          off, len);
3605                         goto out;
3606                 }
3607
3608                 /*
3609                  * Check if falloc starts within first few pages of file
3610                  * and ends within a few pages of the end of file to
3611                  * ensure that most of file is being forced to be
3612                  * fallocated now. If so then setting whole file sparse
3613                  * ie potentially making a few extra pages at the beginning
3614                  * or end of the file non-sparse via set_sparse is harmless.
3615                  */
3616                 if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) {
3617                         rc = -EOPNOTSUPP;
3618                         goto out;
3619                 }
3620         }
3621
3622         smb2_set_sparse(xid, tcon, cfile, inode, false);
3623         rc = 0;
3624
3625 out:
3626         if (rc)
3627                 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid,
3628                                 tcon->ses->Suid, off, len, rc);
3629         else
3630                 trace_smb3_falloc_done(xid, cfile->fid.persistent_fid, tcon->tid,
3631                                 tcon->ses->Suid, off, len);
3632
3633         free_xid(xid);
3634         return rc;
3635 }
3636
3637 static long smb3_collapse_range(struct file *file, struct cifs_tcon *tcon,
3638                             loff_t off, loff_t len)
3639 {
3640         int rc;
3641         unsigned int xid;
3642         struct inode *inode = file_inode(file);
3643         struct cifsInodeInfo *cifsi = CIFS_I(inode);
3644         struct cifsFileInfo *cfile = file->private_data;
3645         struct netfs_inode *ictx = &cifsi->netfs;
3646         loff_t old_eof, new_eof;
3647
3648         xid = get_xid();
3649
3650         inode_lock(inode);
3651
3652         old_eof = i_size_read(inode);
3653         if ((off >= old_eof) ||
3654             off + len >= old_eof) {
3655                 rc = -EINVAL;
3656                 goto out;
3657         }
3658
3659         filemap_invalidate_lock(inode->i_mapping);
3660         rc = filemap_write_and_wait_range(inode->i_mapping, off, old_eof - 1);
3661         if (rc < 0)
3662                 goto out_2;
3663
3664         truncate_pagecache_range(inode, off, old_eof);
3665         ictx->zero_point = old_eof;
3666
3667         rc = smb2_copychunk_range(xid, cfile, cfile, off + len,
3668                                   old_eof - off - len, off);
3669         if (rc < 0)
3670                 goto out_2;
3671
3672         new_eof = old_eof - len;
3673         rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3674                           cfile->fid.volatile_fid, cfile->pid, new_eof);
3675         if (rc < 0)
3676                 goto out_2;
3677
3678         rc = 0;
3679
3680         truncate_setsize(inode, new_eof);
3681         netfs_resize_file(&cifsi->netfs, new_eof, true);
3682         ictx->zero_point = new_eof;
3683         fscache_resize_cookie(cifs_inode_cookie(inode), new_eof);
3684 out_2:
3685         filemap_invalidate_unlock(inode->i_mapping);
3686  out:
3687         inode_unlock(inode);
3688         free_xid(xid);
3689         return rc;
3690 }
3691
3692 static long smb3_insert_range(struct file *file, struct cifs_tcon *tcon,
3693                               loff_t off, loff_t len)
3694 {
3695         int rc;
3696         unsigned int xid;
3697         struct cifsFileInfo *cfile = file->private_data;
3698         struct inode *inode = file_inode(file);
3699         struct cifsInodeInfo *cifsi = CIFS_I(inode);
3700         __u64 count, old_eof, new_eof;
3701
3702         xid = get_xid();
3703
3704         inode_lock(inode);
3705
3706         old_eof = i_size_read(inode);
3707         if (off >= old_eof) {
3708                 rc = -EINVAL;
3709                 goto out;
3710         }
3711
3712         count = old_eof - off;
3713         new_eof = old_eof + len;
3714
3715         filemap_invalidate_lock(inode->i_mapping);
3716         rc = filemap_write_and_wait_range(inode->i_mapping, off, new_eof - 1);
3717         if (rc < 0)
3718                 goto out_2;
3719         truncate_pagecache_range(inode, off, old_eof);
3720
3721         rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3722                           cfile->fid.volatile_fid, cfile->pid, new_eof);
3723         if (rc < 0)
3724                 goto out_2;
3725
3726         truncate_setsize(inode, new_eof);
3727         netfs_resize_file(&cifsi->netfs, i_size_read(inode), true);
3728         fscache_resize_cookie(cifs_inode_cookie(inode), i_size_read(inode));
3729
3730         rc = smb2_copychunk_range(xid, cfile, cfile, off, count, off + len);
3731         if (rc < 0)
3732                 goto out_2;
3733
3734         rc = smb3_zero_data(file, tcon, off, len, xid);
3735         if (rc < 0)
3736                 goto out_2;
3737
3738         rc = 0;
3739 out_2:
3740         filemap_invalidate_unlock(inode->i_mapping);
3741  out:
3742         inode_unlock(inode);
3743         free_xid(xid);
3744         return rc;
3745 }
3746
3747 static loff_t smb3_llseek(struct file *file, struct cifs_tcon *tcon, loff_t offset, int whence)
3748 {
3749         struct cifsFileInfo *wrcfile, *cfile = file->private_data;
3750         struct cifsInodeInfo *cifsi;
3751         struct inode *inode;
3752         int rc = 0;
3753         struct file_allocated_range_buffer in_data, *out_data = NULL;
3754         u32 out_data_len;
3755         unsigned int xid;
3756
3757         if (whence != SEEK_HOLE && whence != SEEK_DATA)
3758                 return generic_file_llseek(file, offset, whence);
3759
3760         inode = d_inode(cfile->dentry);
3761         cifsi = CIFS_I(inode);
3762
3763         if (offset < 0 || offset >= i_size_read(inode))
3764                 return -ENXIO;
3765
3766         xid = get_xid();
3767         /*
3768          * We need to be sure that all dirty pages are written as they
3769          * might fill holes on the server.
3770          * Note that we also MUST flush any written pages since at least
3771          * some servers (Windows2016) will not reflect recent writes in
3772          * QUERY_ALLOCATED_RANGES until SMB2_flush is called.
3773          */
3774         wrcfile = find_writable_file(cifsi, FIND_WR_ANY);
3775         if (wrcfile) {
3776                 filemap_write_and_wait(inode->i_mapping);
3777                 smb2_flush_file(xid, tcon, &wrcfile->fid);
3778                 cifsFileInfo_put(wrcfile);
3779         }
3780
3781         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) {
3782                 if (whence == SEEK_HOLE)
3783                         offset = i_size_read(inode);
3784                 goto lseek_exit;
3785         }
3786
3787         in_data.file_offset = cpu_to_le64(offset);
3788         in_data.length = cpu_to_le64(i_size_read(inode));
3789
3790         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3791                         cfile->fid.volatile_fid,
3792                         FSCTL_QUERY_ALLOCATED_RANGES,
3793                         (char *)&in_data, sizeof(in_data),
3794                         sizeof(struct file_allocated_range_buffer),
3795                         (char **)&out_data, &out_data_len);
3796         if (rc == -E2BIG)
3797                 rc = 0;
3798         if (rc)
3799                 goto lseek_exit;
3800
3801         if (whence == SEEK_HOLE && out_data_len == 0)
3802                 goto lseek_exit;
3803
3804         if (whence == SEEK_DATA && out_data_len == 0) {
3805                 rc = -ENXIO;
3806                 goto lseek_exit;
3807         }
3808
3809         if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3810                 rc = -EINVAL;
3811                 goto lseek_exit;
3812         }
3813         if (whence == SEEK_DATA) {
3814                 offset = le64_to_cpu(out_data->file_offset);
3815                 goto lseek_exit;
3816         }
3817         if (offset < le64_to_cpu(out_data->file_offset))
3818                 goto lseek_exit;
3819
3820         offset = le64_to_cpu(out_data->file_offset) + le64_to_cpu(out_data->length);
3821
3822  lseek_exit:
3823         free_xid(xid);
3824         kfree(out_data);
3825         if (!rc)
3826                 return vfs_setpos(file, offset, inode->i_sb->s_maxbytes);
3827         else
3828                 return rc;
3829 }
3830
3831 static int smb3_fiemap(struct cifs_tcon *tcon,
3832                        struct cifsFileInfo *cfile,
3833                        struct fiemap_extent_info *fei, u64 start, u64 len)
3834 {
3835         unsigned int xid;
3836         struct file_allocated_range_buffer in_data, *out_data;
3837         u32 out_data_len;
3838         int i, num, rc, flags, last_blob;
3839         u64 next;
3840
3841         rc = fiemap_prep(d_inode(cfile->dentry), fei, start, &len, 0);
3842         if (rc)
3843                 return rc;
3844
3845         xid = get_xid();
3846  again:
3847         in_data.file_offset = cpu_to_le64(start);
3848         in_data.length = cpu_to_le64(len);
3849
3850         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3851                         cfile->fid.volatile_fid,
3852                         FSCTL_QUERY_ALLOCATED_RANGES,
3853                         (char *)&in_data, sizeof(in_data),
3854                         1024 * sizeof(struct file_allocated_range_buffer),
3855                         (char **)&out_data, &out_data_len);
3856         if (rc == -E2BIG) {
3857                 last_blob = 0;
3858                 rc = 0;
3859         } else
3860                 last_blob = 1;
3861         if (rc)
3862                 goto out;
3863
3864         if (out_data_len && out_data_len < sizeof(struct file_allocated_range_buffer)) {
3865                 rc = -EINVAL;
3866                 goto out;
3867         }
3868         if (out_data_len % sizeof(struct file_allocated_range_buffer)) {
3869                 rc = -EINVAL;
3870                 goto out;
3871         }
3872
3873         num = out_data_len / sizeof(struct file_allocated_range_buffer);
3874         for (i = 0; i < num; i++) {
3875                 flags = 0;
3876                 if (i == num - 1 && last_blob)
3877                         flags |= FIEMAP_EXTENT_LAST;
3878
3879                 rc = fiemap_fill_next_extent(fei,
3880                                 le64_to_cpu(out_data[i].file_offset),
3881                                 le64_to_cpu(out_data[i].file_offset),
3882                                 le64_to_cpu(out_data[i].length),
3883                                 flags);
3884                 if (rc < 0)
3885                         goto out;
3886                 if (rc == 1) {
3887                         rc = 0;
3888                         goto out;
3889                 }
3890         }
3891
3892         if (!last_blob) {
3893                 next = le64_to_cpu(out_data[num - 1].file_offset) +
3894                   le64_to_cpu(out_data[num - 1].length);
3895                 len = len - (next - start);
3896                 start = next;
3897                 goto again;
3898         }
3899
3900  out:
3901         free_xid(xid);
3902         kfree(out_data);
3903         return rc;
3904 }
3905
3906 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
3907                            loff_t off, loff_t len)
3908 {
3909         /* KEEP_SIZE already checked for by do_fallocate */
3910         if (mode & FALLOC_FL_PUNCH_HOLE)
3911                 return smb3_punch_hole(file, tcon, off, len);
3912         else if (mode & FALLOC_FL_ZERO_RANGE) {
3913                 if (mode & FALLOC_FL_KEEP_SIZE)
3914                         return smb3_zero_range(file, tcon, off, len, true);
3915                 return smb3_zero_range(file, tcon, off, len, false);
3916         } else if (mode == FALLOC_FL_KEEP_SIZE)
3917                 return smb3_simple_falloc(file, tcon, off, len, true);
3918         else if (mode == FALLOC_FL_COLLAPSE_RANGE)
3919                 return smb3_collapse_range(file, tcon, off, len);
3920         else if (mode == FALLOC_FL_INSERT_RANGE)
3921                 return smb3_insert_range(file, tcon, off, len);
3922         else if (mode == 0)
3923                 return smb3_simple_falloc(file, tcon, off, len, false);
3924
3925         return -EOPNOTSUPP;
3926 }
3927
3928 static void
3929 smb2_downgrade_oplock(struct TCP_Server_Info *server,
3930                       struct cifsInodeInfo *cinode, __u32 oplock,
3931                       unsigned int epoch, bool *purge_cache)
3932 {
3933         server->ops->set_oplock_level(cinode, oplock, 0, NULL);
3934 }
3935
3936 static void
3937 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3938                        unsigned int epoch, bool *purge_cache);
3939
3940 static void
3941 smb3_downgrade_oplock(struct TCP_Server_Info *server,
3942                        struct cifsInodeInfo *cinode, __u32 oplock,
3943                        unsigned int epoch, bool *purge_cache)
3944 {
3945         unsigned int old_state = cinode->oplock;
3946         unsigned int old_epoch = cinode->epoch;
3947         unsigned int new_state;
3948
3949         if (epoch > old_epoch) {
3950                 smb21_set_oplock_level(cinode, oplock, 0, NULL);
3951                 cinode->epoch = epoch;
3952         }
3953
3954         new_state = cinode->oplock;
3955         *purge_cache = false;
3956
3957         if ((old_state & CIFS_CACHE_READ_FLG) != 0 &&
3958             (new_state & CIFS_CACHE_READ_FLG) == 0)
3959                 *purge_cache = true;
3960         else if (old_state == new_state && (epoch - old_epoch > 1))
3961                 *purge_cache = true;
3962 }
3963
3964 static void
3965 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3966                       unsigned int epoch, bool *purge_cache)
3967 {
3968         oplock &= 0xFF;
3969         cinode->lease_granted = false;
3970         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
3971                 return;
3972         if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
3973                 cinode->oplock = CIFS_CACHE_RHW_FLG;
3974                 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
3975                          &cinode->netfs.inode);
3976         } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
3977                 cinode->oplock = CIFS_CACHE_RW_FLG;
3978                 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
3979                          &cinode->netfs.inode);
3980         } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
3981                 cinode->oplock = CIFS_CACHE_READ_FLG;
3982                 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
3983                          &cinode->netfs.inode);
3984         } else
3985                 cinode->oplock = 0;
3986 }
3987
3988 static void
3989 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3990                        unsigned int epoch, bool *purge_cache)
3991 {
3992         char message[5] = {0};
3993         unsigned int new_oplock = 0;
3994
3995         oplock &= 0xFF;
3996         cinode->lease_granted = true;
3997         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
3998                 return;
3999
4000         /* Check if the server granted an oplock rather than a lease */
4001         if (oplock & SMB2_OPLOCK_LEVEL_EXCLUSIVE)
4002                 return smb2_set_oplock_level(cinode, oplock, epoch,
4003                                              purge_cache);
4004
4005         if (oplock & SMB2_LEASE_READ_CACHING_HE) {
4006                 new_oplock |= CIFS_CACHE_READ_FLG;
4007                 strcat(message, "R");
4008         }
4009         if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
4010                 new_oplock |= CIFS_CACHE_HANDLE_FLG;
4011                 strcat(message, "H");
4012         }
4013         if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
4014                 new_oplock |= CIFS_CACHE_WRITE_FLG;
4015                 strcat(message, "W");
4016         }
4017         if (!new_oplock)
4018                 strncpy(message, "None", sizeof(message));
4019
4020         cinode->oplock = new_oplock;
4021         cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
4022                  &cinode->netfs.inode);
4023 }
4024
4025 static void
4026 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
4027                       unsigned int epoch, bool *purge_cache)
4028 {
4029         unsigned int old_oplock = cinode->oplock;
4030
4031         smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
4032
4033         if (purge_cache) {
4034                 *purge_cache = false;
4035                 if (old_oplock == CIFS_CACHE_READ_FLG) {
4036                         if (cinode->oplock == CIFS_CACHE_READ_FLG &&
4037                             (epoch - cinode->epoch > 0))
4038                                 *purge_cache = true;
4039                         else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
4040                                  (epoch - cinode->epoch > 1))
4041                                 *purge_cache = true;
4042                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
4043                                  (epoch - cinode->epoch > 1))
4044                                 *purge_cache = true;
4045                         else if (cinode->oplock == 0 &&
4046                                  (epoch - cinode->epoch > 0))
4047                                 *purge_cache = true;
4048                 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
4049                         if (cinode->oplock == CIFS_CACHE_RH_FLG &&
4050                             (epoch - cinode->epoch > 0))
4051                                 *purge_cache = true;
4052                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
4053                                  (epoch - cinode->epoch > 1))
4054                                 *purge_cache = true;
4055                 }
4056                 cinode->epoch = epoch;
4057         }
4058 }
4059
4060 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
4061 static bool
4062 smb2_is_read_op(__u32 oplock)
4063 {
4064         return oplock == SMB2_OPLOCK_LEVEL_II;
4065 }
4066 #endif /* CIFS_ALLOW_INSECURE_LEGACY */
4067
4068 static bool
4069 smb21_is_read_op(__u32 oplock)
4070 {
4071         return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
4072                !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
4073 }
4074
4075 static __le32
4076 map_oplock_to_lease(u8 oplock)
4077 {
4078         if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
4079                 return SMB2_LEASE_WRITE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE;
4080         else if (oplock == SMB2_OPLOCK_LEVEL_II)
4081                 return SMB2_LEASE_READ_CACHING_LE;
4082         else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
4083                 return SMB2_LEASE_HANDLE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE |
4084                        SMB2_LEASE_WRITE_CACHING_LE;
4085         return 0;
4086 }
4087
4088 static char *
4089 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
4090 {
4091         struct create_lease *buf;
4092
4093         buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
4094         if (!buf)
4095                 return NULL;
4096
4097         memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
4098         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
4099
4100         buf->ccontext.DataOffset = cpu_to_le16(offsetof
4101                                         (struct create_lease, lcontext));
4102         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
4103         buf->ccontext.NameOffset = cpu_to_le16(offsetof
4104                                 (struct create_lease, Name));
4105         buf->ccontext.NameLength = cpu_to_le16(4);
4106         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
4107         buf->Name[0] = 'R';
4108         buf->Name[1] = 'q';
4109         buf->Name[2] = 'L';
4110         buf->Name[3] = 's';
4111         return (char *)buf;
4112 }
4113
4114 static char *
4115 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
4116 {
4117         struct create_lease_v2 *buf;
4118
4119         buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
4120         if (!buf)
4121                 return NULL;
4122
4123         memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
4124         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
4125
4126         buf->ccontext.DataOffset = cpu_to_le16(offsetof
4127                                         (struct create_lease_v2, lcontext));
4128         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
4129         buf->ccontext.NameOffset = cpu_to_le16(offsetof
4130                                 (struct create_lease_v2, Name));
4131         buf->ccontext.NameLength = cpu_to_le16(4);
4132         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
4133         buf->Name[0] = 'R';
4134         buf->Name[1] = 'q';
4135         buf->Name[2] = 'L';
4136         buf->Name[3] = 's';
4137         return (char *)buf;
4138 }
4139
4140 static __u8
4141 smb2_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
4142 {
4143         struct create_lease *lc = (struct create_lease *)buf;
4144
4145         *epoch = 0; /* not used */
4146         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE)
4147                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
4148         return le32_to_cpu(lc->lcontext.LeaseState);
4149 }
4150
4151 static __u8
4152 smb3_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
4153 {
4154         struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
4155
4156         *epoch = le16_to_cpu(lc->lcontext.Epoch);
4157         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE)
4158                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
4159         if (lease_key)
4160                 memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE);
4161         return le32_to_cpu(lc->lcontext.LeaseState);
4162 }
4163
4164 static unsigned int
4165 smb2_wp_retry_size(struct inode *inode)
4166 {
4167         return min_t(unsigned int, CIFS_SB(inode->i_sb)->ctx->wsize,
4168                      SMB2_MAX_BUFFER_SIZE);
4169 }
4170
4171 static bool
4172 smb2_dir_needs_close(struct cifsFileInfo *cfile)
4173 {
4174         return !cfile->invalidHandle;
4175 }
4176
4177 static void
4178 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len,
4179                    struct smb_rqst *old_rq, __le16 cipher_type)
4180 {
4181         struct smb2_hdr *shdr =
4182                         (struct smb2_hdr *)old_rq->rq_iov[0].iov_base;
4183
4184         memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
4185         tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
4186         tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
4187         tr_hdr->Flags = cpu_to_le16(0x01);
4188         if ((cipher_type == SMB2_ENCRYPTION_AES128_GCM) ||
4189             (cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4190                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
4191         else
4192                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
4193         memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8);
4194 }
4195
4196 static void *smb2_aead_req_alloc(struct crypto_aead *tfm, const struct smb_rqst *rqst,
4197                                  int num_rqst, const u8 *sig, u8 **iv,
4198                                  struct aead_request **req, struct sg_table *sgt,
4199                                  unsigned int *num_sgs, size_t *sensitive_size)
4200 {
4201         unsigned int req_size = sizeof(**req) + crypto_aead_reqsize(tfm);
4202         unsigned int iv_size = crypto_aead_ivsize(tfm);
4203         unsigned int len;
4204         u8 *p;
4205
4206         *num_sgs = cifs_get_num_sgs(rqst, num_rqst, sig);
4207         if (IS_ERR_VALUE((long)(int)*num_sgs))
4208                 return ERR_PTR(*num_sgs);
4209
4210         len = iv_size;
4211         len += crypto_aead_alignmask(tfm) & ~(crypto_tfm_ctx_alignment() - 1);
4212         len = ALIGN(len, crypto_tfm_ctx_alignment());
4213         len += req_size;
4214         len = ALIGN(len, __alignof__(struct scatterlist));
4215         len += array_size(*num_sgs, sizeof(struct scatterlist));
4216         *sensitive_size = len;
4217
4218         p = kvzalloc(len, GFP_NOFS);
4219         if (!p)
4220                 return ERR_PTR(-ENOMEM);
4221
4222         *iv = (u8 *)PTR_ALIGN(p, crypto_aead_alignmask(tfm) + 1);
4223         *req = (struct aead_request *)PTR_ALIGN(*iv + iv_size,
4224                                                 crypto_tfm_ctx_alignment());
4225         sgt->sgl = (struct scatterlist *)PTR_ALIGN((u8 *)*req + req_size,
4226                                                    __alignof__(struct scatterlist));
4227         return p;
4228 }
4229
4230 static void *smb2_get_aead_req(struct crypto_aead *tfm, struct smb_rqst *rqst,
4231                                int num_rqst, const u8 *sig, u8 **iv,
4232                                struct aead_request **req, struct scatterlist **sgl,
4233                                size_t *sensitive_size)
4234 {
4235         struct sg_table sgtable = {};
4236         unsigned int skip, num_sgs, i, j;
4237         ssize_t rc;
4238         void *p;
4239
4240         p = smb2_aead_req_alloc(tfm, rqst, num_rqst, sig, iv, req, &sgtable,
4241                                 &num_sgs, sensitive_size);
4242         if (IS_ERR(p))
4243                 return ERR_CAST(p);
4244
4245         sg_init_marker(sgtable.sgl, num_sgs);
4246
4247         /*
4248          * The first rqst has a transform header where the
4249          * first 20 bytes are not part of the encrypted blob.
4250          */
4251         skip = 20;
4252
4253         for (i = 0; i < num_rqst; i++) {
4254                 struct iov_iter *iter = &rqst[i].rq_iter;
4255                 size_t count = iov_iter_count(iter);
4256
4257                 for (j = 0; j < rqst[i].rq_nvec; j++) {
4258                         cifs_sg_set_buf(&sgtable,
4259                                         rqst[i].rq_iov[j].iov_base + skip,
4260                                         rqst[i].rq_iov[j].iov_len - skip);
4261
4262                         /* See the above comment on the 'skip' assignment */
4263                         skip = 0;
4264                 }
4265                 sgtable.orig_nents = sgtable.nents;
4266
4267                 rc = extract_iter_to_sg(iter, count, &sgtable,
4268                                         num_sgs - sgtable.nents, 0);
4269                 iov_iter_revert(iter, rc);
4270                 sgtable.orig_nents = sgtable.nents;
4271         }
4272
4273         cifs_sg_set_buf(&sgtable, sig, SMB2_SIGNATURE_SIZE);
4274         sg_mark_end(&sgtable.sgl[sgtable.nents - 1]);
4275         *sgl = sgtable.sgl;
4276         return p;
4277 }
4278
4279 static int
4280 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)
4281 {
4282         struct TCP_Server_Info *pserver;
4283         struct cifs_ses *ses;
4284         u8 *ses_enc_key;
4285
4286         /* If server is a channel, select the primary channel */
4287         pserver = SERVER_IS_CHAN(server) ? server->primary_server : server;
4288
4289         spin_lock(&cifs_tcp_ses_lock);
4290         list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) {
4291                 if (ses->Suid == ses_id) {
4292                         spin_lock(&ses->ses_lock);
4293                         ses_enc_key = enc ? ses->smb3encryptionkey :
4294                                 ses->smb3decryptionkey;
4295                         memcpy(key, ses_enc_key, SMB3_ENC_DEC_KEY_SIZE);
4296                         spin_unlock(&ses->ses_lock);
4297                         spin_unlock(&cifs_tcp_ses_lock);
4298                         return 0;
4299                 }
4300         }
4301         spin_unlock(&cifs_tcp_ses_lock);
4302
4303         trace_smb3_ses_not_found(ses_id);
4304
4305         return -EAGAIN;
4306 }
4307 /*
4308  * Encrypt or decrypt @rqst message. @rqst[0] has the following format:
4309  * iov[0]   - transform header (associate data),
4310  * iov[1-N] - SMB2 header and pages - data to encrypt.
4311  * On success return encrypted data in iov[1-N] and pages, leave iov[0]
4312  * untouched.
4313  */
4314 static int
4315 crypt_message(struct TCP_Server_Info *server, int num_rqst,
4316               struct smb_rqst *rqst, int enc)
4317 {
4318         struct smb2_transform_hdr *tr_hdr =
4319                 (struct smb2_transform_hdr *)rqst[0].rq_iov[0].iov_base;
4320         unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20;
4321         int rc = 0;
4322         struct scatterlist *sg;
4323         u8 sign[SMB2_SIGNATURE_SIZE] = {};
4324         u8 key[SMB3_ENC_DEC_KEY_SIZE];
4325         struct aead_request *req;
4326         u8 *iv;
4327         DECLARE_CRYPTO_WAIT(wait);
4328         struct crypto_aead *tfm;
4329         unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
4330         void *creq;
4331         size_t sensitive_size;
4332
4333         rc = smb2_get_enc_key(server, le64_to_cpu(tr_hdr->SessionId), enc, key);
4334         if (rc) {
4335                 cifs_server_dbg(FYI, "%s: Could not get %scryption key. sid: 0x%llx\n", __func__,
4336                          enc ? "en" : "de", le64_to_cpu(tr_hdr->SessionId));
4337                 return rc;
4338         }
4339
4340         rc = smb3_crypto_aead_allocate(server);
4341         if (rc) {
4342                 cifs_server_dbg(VFS, "%s: crypto alloc failed\n", __func__);
4343                 return rc;
4344         }
4345
4346         tfm = enc ? server->secmech.enc : server->secmech.dec;
4347
4348         if ((server->cipher_type == SMB2_ENCRYPTION_AES256_CCM) ||
4349                 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4350                 rc = crypto_aead_setkey(tfm, key, SMB3_GCM256_CRYPTKEY_SIZE);
4351         else
4352                 rc = crypto_aead_setkey(tfm, key, SMB3_GCM128_CRYPTKEY_SIZE);
4353
4354         if (rc) {
4355                 cifs_server_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc);
4356                 return rc;
4357         }
4358
4359         rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE);
4360         if (rc) {
4361                 cifs_server_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc);
4362                 return rc;
4363         }
4364
4365         creq = smb2_get_aead_req(tfm, rqst, num_rqst, sign, &iv, &req, &sg,
4366                                  &sensitive_size);
4367         if (IS_ERR(creq))
4368                 return PTR_ERR(creq);
4369
4370         if (!enc) {
4371                 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE);
4372                 crypt_len += SMB2_SIGNATURE_SIZE;
4373         }
4374
4375         if ((server->cipher_type == SMB2_ENCRYPTION_AES128_GCM) ||
4376             (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4377                 memcpy(iv, (char *)tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
4378         else {
4379                 iv[0] = 3;
4380                 memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
4381         }
4382
4383         aead_request_set_tfm(req, tfm);
4384         aead_request_set_crypt(req, sg, sg, crypt_len, iv);
4385         aead_request_set_ad(req, assoc_data_len);
4386
4387         aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
4388                                   crypto_req_done, &wait);
4389
4390         rc = crypto_wait_req(enc ? crypto_aead_encrypt(req)
4391                                 : crypto_aead_decrypt(req), &wait);
4392
4393         if (!rc && enc)
4394                 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE);
4395
4396         kvfree_sensitive(creq, sensitive_size);
4397         return rc;
4398 }
4399
4400 /*
4401  * Clear a read buffer, discarding the folios which have XA_MARK_0 set.
4402  */
4403 static void cifs_clear_xarray_buffer(struct xarray *buffer)
4404 {
4405         struct folio *folio;
4406
4407         XA_STATE(xas, buffer, 0);
4408
4409         rcu_read_lock();
4410         xas_for_each_marked(&xas, folio, ULONG_MAX, XA_MARK_0) {
4411                 folio_put(folio);
4412         }
4413         rcu_read_unlock();
4414         xa_destroy(buffer);
4415 }
4416
4417 void
4418 smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst)
4419 {
4420         int i;
4421
4422         for (i = 0; i < num_rqst; i++)
4423                 if (!xa_empty(&rqst[i].rq_buffer))
4424                         cifs_clear_xarray_buffer(&rqst[i].rq_buffer);
4425 }
4426
4427 /*
4428  * This function will initialize new_rq and encrypt the content.
4429  * The first entry, new_rq[0], only contains a single iov which contains
4430  * a smb2_transform_hdr and is pre-allocated by the caller.
4431  * This function then populates new_rq[1+] with the content from olq_rq[0+].
4432  *
4433  * The end result is an array of smb_rqst structures where the first structure
4434  * only contains a single iov for the transform header which we then can pass
4435  * to crypt_message().
4436  *
4437  * new_rq[0].rq_iov[0] :  smb2_transform_hdr pre-allocated by the caller
4438  * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests
4439  */
4440 static int
4441 smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst,
4442                        struct smb_rqst *new_rq, struct smb_rqst *old_rq)
4443 {
4444         struct smb2_transform_hdr *tr_hdr = new_rq[0].rq_iov[0].iov_base;
4445         struct page *page;
4446         unsigned int orig_len = 0;
4447         int i, j;
4448         int rc = -ENOMEM;
4449
4450         for (i = 1; i < num_rqst; i++) {
4451                 struct smb_rqst *old = &old_rq[i - 1];
4452                 struct smb_rqst *new = &new_rq[i];
4453                 struct xarray *buffer = &new->rq_buffer;
4454                 size_t size = iov_iter_count(&old->rq_iter), seg, copied = 0;
4455
4456                 orig_len += smb_rqst_len(server, old);
4457                 new->rq_iov = old->rq_iov;
4458                 new->rq_nvec = old->rq_nvec;
4459
4460                 xa_init(buffer);
4461
4462                 if (size > 0) {
4463                         unsigned int npages = DIV_ROUND_UP(size, PAGE_SIZE);
4464
4465                         for (j = 0; j < npages; j++) {
4466                                 void *o;
4467
4468                                 rc = -ENOMEM;
4469                                 page = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
4470                                 if (!page)
4471                                         goto err_free;
4472                                 page->index = j;
4473                                 o = xa_store(buffer, j, page, GFP_KERNEL);
4474                                 if (xa_is_err(o)) {
4475                                         rc = xa_err(o);
4476                                         put_page(page);
4477                                         goto err_free;
4478                                 }
4479
4480                                 xa_set_mark(buffer, j, XA_MARK_0);
4481
4482                                 seg = min_t(size_t, size - copied, PAGE_SIZE);
4483                                 if (copy_page_from_iter(page, 0, seg, &old->rq_iter) != seg) {
4484                                         rc = -EFAULT;
4485                                         goto err_free;
4486                                 }
4487                                 copied += seg;
4488                         }
4489                         iov_iter_xarray(&new->rq_iter, ITER_SOURCE,
4490                                         buffer, 0, size);
4491                         new->rq_iter_size = size;
4492                 }
4493         }
4494
4495         /* fill the 1st iov with a transform header */
4496         fill_transform_hdr(tr_hdr, orig_len, old_rq, server->cipher_type);
4497
4498         rc = crypt_message(server, num_rqst, new_rq, 1);
4499         cifs_dbg(FYI, "Encrypt message returned %d\n", rc);
4500         if (rc)
4501                 goto err_free;
4502
4503         return rc;
4504
4505 err_free:
4506         smb3_free_compound_rqst(num_rqst - 1, &new_rq[1]);
4507         return rc;
4508 }
4509
4510 static int
4511 smb3_is_transform_hdr(void *buf)
4512 {
4513         struct smb2_transform_hdr *trhdr = buf;
4514
4515         return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
4516 }
4517
4518 static int
4519 decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
4520                  unsigned int buf_data_size, struct iov_iter *iter,
4521                  bool is_offloaded)
4522 {
4523         struct kvec iov[2];
4524         struct smb_rqst rqst = {NULL};
4525         size_t iter_size = 0;
4526         int rc;
4527
4528         iov[0].iov_base = buf;
4529         iov[0].iov_len = sizeof(struct smb2_transform_hdr);
4530         iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr);
4531         iov[1].iov_len = buf_data_size;
4532
4533         rqst.rq_iov = iov;
4534         rqst.rq_nvec = 2;
4535         if (iter) {
4536                 rqst.rq_iter = *iter;
4537                 rqst.rq_iter_size = iov_iter_count(iter);
4538                 iter_size = iov_iter_count(iter);
4539         }
4540
4541         rc = crypt_message(server, 1, &rqst, 0);
4542         cifs_dbg(FYI, "Decrypt message returned %d\n", rc);
4543
4544         if (rc)
4545                 return rc;
4546
4547         memmove(buf, iov[1].iov_base, buf_data_size);
4548
4549         if (!is_offloaded)
4550                 server->total_read = buf_data_size + iter_size;
4551
4552         return rc;
4553 }
4554
4555 static int
4556 cifs_copy_pages_to_iter(struct xarray *pages, unsigned int data_size,
4557                         unsigned int skip, struct iov_iter *iter)
4558 {
4559         struct page *page;
4560         unsigned long index;
4561
4562         xa_for_each(pages, index, page) {
4563                 size_t n, len = min_t(unsigned int, PAGE_SIZE - skip, data_size);
4564
4565                 n = copy_page_to_iter(page, skip, len, iter);
4566                 if (n != len) {
4567                         cifs_dbg(VFS, "%s: something went wrong\n", __func__);
4568                         return -EIO;
4569                 }
4570                 data_size -= n;
4571                 skip = 0;
4572         }
4573
4574         return 0;
4575 }
4576
4577 static int
4578 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
4579                  char *buf, unsigned int buf_len, struct xarray *pages,
4580                  unsigned int pages_len, bool is_offloaded)
4581 {
4582         unsigned int data_offset;
4583         unsigned int data_len;
4584         unsigned int cur_off;
4585         unsigned int cur_page_idx;
4586         unsigned int pad_len;
4587         struct cifs_readdata *rdata = mid->callback_data;
4588         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
4589         int length;
4590         bool use_rdma_mr = false;
4591
4592         if (shdr->Command != SMB2_READ) {
4593                 cifs_server_dbg(VFS, "only big read responses are supported\n");
4594                 return -EOPNOTSUPP;
4595         }
4596
4597         if (server->ops->is_session_expired &&
4598             server->ops->is_session_expired(buf)) {
4599                 if (!is_offloaded)
4600                         cifs_reconnect(server, true);
4601                 return -1;
4602         }
4603
4604         if (server->ops->is_status_pending &&
4605                         server->ops->is_status_pending(buf, server))
4606                 return -1;
4607
4608         /* set up first two iov to get credits */
4609         rdata->iov[0].iov_base = buf;
4610         rdata->iov[0].iov_len = 0;
4611         rdata->iov[1].iov_base = buf;
4612         rdata->iov[1].iov_len =
4613                 min_t(unsigned int, buf_len, server->vals->read_rsp_size);
4614         cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
4615                  rdata->iov[0].iov_base, rdata->iov[0].iov_len);
4616         cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n",
4617                  rdata->iov[1].iov_base, rdata->iov[1].iov_len);
4618
4619         rdata->result = server->ops->map_error(buf, true);
4620         if (rdata->result != 0) {
4621                 cifs_dbg(FYI, "%s: server returned error %d\n",
4622                          __func__, rdata->result);
4623                 /* normal error on read response */
4624                 if (is_offloaded)
4625                         mid->mid_state = MID_RESPONSE_RECEIVED;
4626                 else
4627                         dequeue_mid(mid, false);
4628                 return 0;
4629         }
4630
4631         data_offset = server->ops->read_data_offset(buf);
4632 #ifdef CONFIG_CIFS_SMB_DIRECT
4633         use_rdma_mr = rdata->mr;
4634 #endif
4635         data_len = server->ops->read_data_length(buf, use_rdma_mr);
4636
4637         if (data_offset < server->vals->read_rsp_size) {
4638                 /*
4639                  * win2k8 sometimes sends an offset of 0 when the read
4640                  * is beyond the EOF. Treat it as if the data starts just after
4641                  * the header.
4642                  */
4643                 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n",
4644                          __func__, data_offset);
4645                 data_offset = server->vals->read_rsp_size;
4646         } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) {
4647                 /* data_offset is beyond the end of smallbuf */
4648                 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n",
4649                          __func__, data_offset);
4650                 rdata->result = -EIO;
4651                 if (is_offloaded)
4652                         mid->mid_state = MID_RESPONSE_MALFORMED;
4653                 else
4654                         dequeue_mid(mid, rdata->result);
4655                 return 0;
4656         }
4657
4658         pad_len = data_offset - server->vals->read_rsp_size;
4659
4660         if (buf_len <= data_offset) {
4661                 /* read response payload is in pages */
4662                 cur_page_idx = pad_len / PAGE_SIZE;
4663                 cur_off = pad_len % PAGE_SIZE;
4664
4665                 if (cur_page_idx != 0) {
4666                         /* data offset is beyond the 1st page of response */
4667                         cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n",
4668                                  __func__, data_offset);
4669                         rdata->result = -EIO;
4670                         if (is_offloaded)
4671                                 mid->mid_state = MID_RESPONSE_MALFORMED;
4672                         else
4673                                 dequeue_mid(mid, rdata->result);
4674                         return 0;
4675                 }
4676
4677                 if (data_len > pages_len - pad_len) {
4678                         /* data_len is corrupt -- discard frame */
4679                         rdata->result = -EIO;
4680                         if (is_offloaded)
4681                                 mid->mid_state = MID_RESPONSE_MALFORMED;
4682                         else
4683                                 dequeue_mid(mid, rdata->result);
4684                         return 0;
4685                 }
4686
4687                 /* Copy the data to the output I/O iterator. */
4688                 rdata->result = cifs_copy_pages_to_iter(pages, pages_len,
4689                                                         cur_off, &rdata->iter);
4690                 if (rdata->result != 0) {
4691                         if (is_offloaded)
4692                                 mid->mid_state = MID_RESPONSE_MALFORMED;
4693                         else
4694                                 dequeue_mid(mid, rdata->result);
4695                         return 0;
4696                 }
4697                 rdata->got_bytes = pages_len;
4698
4699         } else if (buf_len >= data_offset + data_len) {
4700                 /* read response payload is in buf */
4701                 WARN_ONCE(pages && !xa_empty(pages),
4702                           "read data can be either in buf or in pages");
4703                 length = copy_to_iter(buf + data_offset, data_len, &rdata->iter);
4704                 if (length < 0)
4705                         return length;
4706                 rdata->got_bytes = data_len;
4707         } else {
4708                 /* read response payload cannot be in both buf and pages */
4709                 WARN_ONCE(1, "buf can not contain only a part of read data");
4710                 rdata->result = -EIO;
4711                 if (is_offloaded)
4712                         mid->mid_state = MID_RESPONSE_MALFORMED;
4713                 else
4714                         dequeue_mid(mid, rdata->result);
4715                 return 0;
4716         }
4717
4718         if (is_offloaded)
4719                 mid->mid_state = MID_RESPONSE_RECEIVED;
4720         else
4721                 dequeue_mid(mid, false);
4722         return 0;
4723 }
4724
4725 struct smb2_decrypt_work {
4726         struct work_struct decrypt;
4727         struct TCP_Server_Info *server;
4728         struct xarray buffer;
4729         char *buf;
4730         unsigned int len;
4731 };
4732
4733
4734 static void smb2_decrypt_offload(struct work_struct *work)
4735 {
4736         struct smb2_decrypt_work *dw = container_of(work,
4737                                 struct smb2_decrypt_work, decrypt);
4738         int rc;
4739         struct mid_q_entry *mid;
4740         struct iov_iter iter;
4741
4742         iov_iter_xarray(&iter, ITER_DEST, &dw->buffer, 0, dw->len);
4743         rc = decrypt_raw_data(dw->server, dw->buf, dw->server->vals->read_rsp_size,
4744                               &iter, true);
4745         if (rc) {
4746                 cifs_dbg(VFS, "error decrypting rc=%d\n", rc);
4747                 goto free_pages;
4748         }
4749
4750         dw->server->lstrp = jiffies;
4751         mid = smb2_find_dequeue_mid(dw->server, dw->buf);
4752         if (mid == NULL)
4753                 cifs_dbg(FYI, "mid not found\n");
4754         else {
4755                 mid->decrypted = true;
4756                 rc = handle_read_data(dw->server, mid, dw->buf,
4757                                       dw->server->vals->read_rsp_size,
4758                                       &dw->buffer, dw->len,
4759                                       true);
4760                 if (rc >= 0) {
4761 #ifdef CONFIG_CIFS_STATS2
4762                         mid->when_received = jiffies;
4763 #endif
4764                         if (dw->server->ops->is_network_name_deleted)
4765                                 dw->server->ops->is_network_name_deleted(dw->buf,
4766                                                                          dw->server);
4767
4768                         mid->callback(mid);
4769                 } else {
4770                         spin_lock(&dw->server->srv_lock);
4771                         if (dw->server->tcpStatus == CifsNeedReconnect) {
4772                                 spin_lock(&dw->server->mid_lock);
4773                                 mid->mid_state = MID_RETRY_NEEDED;
4774                                 spin_unlock(&dw->server->mid_lock);
4775                                 spin_unlock(&dw->server->srv_lock);
4776                                 mid->callback(mid);
4777                         } else {
4778                                 spin_lock(&dw->server->mid_lock);
4779                                 mid->mid_state = MID_REQUEST_SUBMITTED;
4780                                 mid->mid_flags &= ~(MID_DELETED);
4781                                 list_add_tail(&mid->qhead,
4782                                         &dw->server->pending_mid_q);
4783                                 spin_unlock(&dw->server->mid_lock);
4784                                 spin_unlock(&dw->server->srv_lock);
4785                         }
4786                 }
4787                 release_mid(mid);
4788         }
4789
4790 free_pages:
4791         cifs_clear_xarray_buffer(&dw->buffer);
4792         cifs_small_buf_release(dw->buf);
4793         kfree(dw);
4794 }
4795
4796
4797 static int
4798 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid,
4799                        int *num_mids)
4800 {
4801         struct page *page;
4802         char *buf = server->smallbuf;
4803         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
4804         struct iov_iter iter;
4805         unsigned int len, npages;
4806         unsigned int buflen = server->pdu_size;
4807         int rc;
4808         int i = 0;
4809         struct smb2_decrypt_work *dw;
4810
4811         dw = kzalloc(sizeof(struct smb2_decrypt_work), GFP_KERNEL);
4812         if (!dw)
4813                 return -ENOMEM;
4814         xa_init(&dw->buffer);
4815         INIT_WORK(&dw->decrypt, smb2_decrypt_offload);
4816         dw->server = server;
4817
4818         *num_mids = 1;
4819         len = min_t(unsigned int, buflen, server->vals->read_rsp_size +
4820                 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1;
4821
4822         rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len);
4823         if (rc < 0)
4824                 goto free_dw;
4825         server->total_read += rc;
4826
4827         len = le32_to_cpu(tr_hdr->OriginalMessageSize) -
4828                 server->vals->read_rsp_size;
4829         dw->len = len;
4830         npages = DIV_ROUND_UP(len, PAGE_SIZE);
4831
4832         rc = -ENOMEM;
4833         for (; i < npages; i++) {
4834                 void *old;
4835
4836                 page = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
4837                 if (!page)
4838                         goto discard_data;
4839                 page->index = i;
4840                 old = xa_store(&dw->buffer, i, page, GFP_KERNEL);
4841                 if (xa_is_err(old)) {
4842                         rc = xa_err(old);
4843                         put_page(page);
4844                         goto discard_data;
4845                 }
4846                 xa_set_mark(&dw->buffer, i, XA_MARK_0);
4847         }
4848
4849         iov_iter_xarray(&iter, ITER_DEST, &dw->buffer, 0, npages * PAGE_SIZE);
4850
4851         /* Read the data into the buffer and clear excess bufferage. */
4852         rc = cifs_read_iter_from_socket(server, &iter, dw->len);
4853         if (rc < 0)
4854                 goto discard_data;
4855
4856         server->total_read += rc;
4857         if (rc < npages * PAGE_SIZE)
4858                 iov_iter_zero(npages * PAGE_SIZE - rc, &iter);
4859         iov_iter_revert(&iter, npages * PAGE_SIZE);
4860         iov_iter_truncate(&iter, dw->len);
4861
4862         rc = cifs_discard_remaining_data(server);
4863         if (rc)
4864                 goto free_pages;
4865
4866         /*
4867          * For large reads, offload to different thread for better performance,
4868          * use more cores decrypting which can be expensive
4869          */
4870
4871         if ((server->min_offload) && (server->in_flight > 1) &&
4872             (server->pdu_size >= server->min_offload)) {
4873                 dw->buf = server->smallbuf;
4874                 server->smallbuf = (char *)cifs_small_buf_get();
4875
4876                 queue_work(decrypt_wq, &dw->decrypt);
4877                 *num_mids = 0; /* worker thread takes care of finding mid */
4878                 return -1;
4879         }
4880
4881         rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size,
4882                               &iter, false);
4883         if (rc)
4884                 goto free_pages;
4885
4886         *mid = smb2_find_mid(server, buf);
4887         if (*mid == NULL) {
4888                 cifs_dbg(FYI, "mid not found\n");
4889         } else {
4890                 cifs_dbg(FYI, "mid found\n");
4891                 (*mid)->decrypted = true;
4892                 rc = handle_read_data(server, *mid, buf,
4893                                       server->vals->read_rsp_size,
4894                                       &dw->buffer, dw->len, false);
4895                 if (rc >= 0) {
4896                         if (server->ops->is_network_name_deleted) {
4897                                 server->ops->is_network_name_deleted(buf,
4898                                                                 server);
4899                         }
4900                 }
4901         }
4902
4903 free_pages:
4904         cifs_clear_xarray_buffer(&dw->buffer);
4905 free_dw:
4906         kfree(dw);
4907         return rc;
4908 discard_data:
4909         cifs_discard_remaining_data(server);
4910         goto free_pages;
4911 }
4912
4913 static int
4914 receive_encrypted_standard(struct TCP_Server_Info *server,
4915                            struct mid_q_entry **mids, char **bufs,
4916                            int *num_mids)
4917 {
4918         int ret, length;
4919         char *buf = server->smallbuf;
4920         struct smb2_hdr *shdr;
4921         unsigned int pdu_length = server->pdu_size;
4922         unsigned int buf_size;
4923         unsigned int next_cmd;
4924         struct mid_q_entry *mid_entry;
4925         int next_is_large;
4926         char *next_buffer = NULL;
4927
4928         *num_mids = 0;
4929
4930         /* switch to large buffer if too big for a small one */
4931         if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) {
4932                 server->large_buf = true;
4933                 memcpy(server->bigbuf, buf, server->total_read);
4934                 buf = server->bigbuf;
4935         }
4936
4937         /* now read the rest */
4938         length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
4939                                 pdu_length - HEADER_SIZE(server) + 1);
4940         if (length < 0)
4941                 return length;
4942         server->total_read += length;
4943
4944         buf_size = pdu_length - sizeof(struct smb2_transform_hdr);
4945         length = decrypt_raw_data(server, buf, buf_size, NULL, false);
4946         if (length)
4947                 return length;
4948
4949         next_is_large = server->large_buf;
4950 one_more:
4951         shdr = (struct smb2_hdr *)buf;
4952         next_cmd = le32_to_cpu(shdr->NextCommand);
4953         if (next_cmd) {
4954                 if (WARN_ON_ONCE(next_cmd > pdu_length))
4955                         return -1;
4956                 if (next_is_large)
4957                         next_buffer = (char *)cifs_buf_get();
4958                 else
4959                         next_buffer = (char *)cifs_small_buf_get();
4960                 memcpy(next_buffer, buf + next_cmd, pdu_length - next_cmd);
4961         }
4962
4963         mid_entry = smb2_find_mid(server, buf);
4964         if (mid_entry == NULL)
4965                 cifs_dbg(FYI, "mid not found\n");
4966         else {
4967                 cifs_dbg(FYI, "mid found\n");
4968                 mid_entry->decrypted = true;
4969                 mid_entry->resp_buf_size = server->pdu_size;
4970         }
4971
4972         if (*num_mids >= MAX_COMPOUND) {
4973                 cifs_server_dbg(VFS, "too many PDUs in compound\n");
4974                 return -1;
4975         }
4976         bufs[*num_mids] = buf;
4977         mids[(*num_mids)++] = mid_entry;
4978
4979         if (mid_entry && mid_entry->handle)
4980                 ret = mid_entry->handle(server, mid_entry);
4981         else
4982                 ret = cifs_handle_standard(server, mid_entry);
4983
4984         if (ret == 0 && next_cmd) {
4985                 pdu_length -= next_cmd;
4986                 server->large_buf = next_is_large;
4987                 if (next_is_large)
4988                         server->bigbuf = buf = next_buffer;
4989                 else
4990                         server->smallbuf = buf = next_buffer;
4991                 goto one_more;
4992         } else if (ret != 0) {
4993                 /*
4994                  * ret != 0 here means that we didn't get to handle_mid() thus
4995                  * server->smallbuf and server->bigbuf are still valid. We need
4996                  * to free next_buffer because it is not going to be used
4997                  * anywhere.
4998                  */
4999                 if (next_is_large)
5000                         free_rsp_buf(CIFS_LARGE_BUFFER, next_buffer);
5001                 else
5002                         free_rsp_buf(CIFS_SMALL_BUFFER, next_buffer);
5003         }
5004
5005         return ret;
5006 }
5007
5008 static int
5009 smb3_receive_transform(struct TCP_Server_Info *server,
5010                        struct mid_q_entry **mids, char **bufs, int *num_mids)
5011 {
5012         char *buf = server->smallbuf;
5013         unsigned int pdu_length = server->pdu_size;
5014         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
5015         unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
5016
5017         if (pdu_length < sizeof(struct smb2_transform_hdr) +
5018                                                 sizeof(struct smb2_hdr)) {
5019                 cifs_server_dbg(VFS, "Transform message is too small (%u)\n",
5020                          pdu_length);
5021                 cifs_reconnect(server, true);
5022                 return -ECONNABORTED;
5023         }
5024
5025         if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) {
5026                 cifs_server_dbg(VFS, "Transform message is broken\n");
5027                 cifs_reconnect(server, true);
5028                 return -ECONNABORTED;
5029         }
5030
5031         /* TODO: add support for compounds containing READ. */
5032         if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server)) {
5033                 return receive_encrypted_read(server, &mids[0], num_mids);
5034         }
5035
5036         return receive_encrypted_standard(server, mids, bufs, num_mids);
5037 }
5038
5039 int
5040 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid)
5041 {
5042         char *buf = server->large_buf ? server->bigbuf : server->smallbuf;
5043
5044         return handle_read_data(server, mid, buf, server->pdu_size,
5045                                 NULL, 0, false);
5046 }
5047
5048 static int smb2_next_header(struct TCP_Server_Info *server, char *buf,
5049                             unsigned int *noff)
5050 {
5051         struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
5052         struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf;
5053
5054         if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
5055                 *noff = le32_to_cpu(t_hdr->OriginalMessageSize);
5056                 if (unlikely(check_add_overflow(*noff, sizeof(*t_hdr), noff)))
5057                         return -EINVAL;
5058         } else {
5059                 *noff = le32_to_cpu(hdr->NextCommand);
5060         }
5061         if (unlikely(*noff && *noff < MID_HEADER_SIZE(server)))
5062                 return -EINVAL;
5063         return 0;
5064 }
5065
5066 int cifs_sfu_make_node(unsigned int xid, struct inode *inode,
5067                        struct dentry *dentry, struct cifs_tcon *tcon,
5068                        const char *full_path, umode_t mode, dev_t dev)
5069 {
5070         struct cifs_open_info_data buf = {};
5071         struct TCP_Server_Info *server = tcon->ses->server;
5072         struct cifs_open_parms oparms;
5073         struct cifs_io_parms io_parms = {};
5074         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
5075         struct cifs_fid fid;
5076         unsigned int bytes_written;
5077         struct win_dev *pdev;
5078         struct kvec iov[2];
5079         __u32 oplock = server->oplocks ? REQ_OPLOCK : 0;
5080         int rc;
5081
5082         if (!S_ISCHR(mode) && !S_ISBLK(mode) && !S_ISFIFO(mode))
5083                 return -EPERM;
5084
5085         oparms = (struct cifs_open_parms) {
5086                 .tcon = tcon,
5087                 .cifs_sb = cifs_sb,
5088                 .desired_access = GENERIC_WRITE,
5089                 .create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR |
5090                                                       CREATE_OPTION_SPECIAL),
5091                 .disposition = FILE_CREATE,
5092                 .path = full_path,
5093                 .fid = &fid,
5094         };
5095
5096         rc = server->ops->open(xid, &oparms, &oplock, &buf);
5097         if (rc)
5098                 return rc;
5099
5100         /*
5101          * BB Do not bother to decode buf since no local inode yet to put
5102          * timestamps in, but we can reuse it safely.
5103          */
5104         pdev = (struct win_dev *)&buf.fi;
5105         io_parms.pid = current->tgid;
5106         io_parms.tcon = tcon;
5107         io_parms.length = sizeof(*pdev);
5108         iov[1].iov_base = pdev;
5109         iov[1].iov_len = sizeof(*pdev);
5110         if (S_ISCHR(mode)) {
5111                 memcpy(pdev->type, "IntxCHR", 8);
5112                 pdev->major = cpu_to_le64(MAJOR(dev));
5113                 pdev->minor = cpu_to_le64(MINOR(dev));
5114         } else if (S_ISBLK(mode)) {
5115                 memcpy(pdev->type, "IntxBLK", 8);
5116                 pdev->major = cpu_to_le64(MAJOR(dev));
5117                 pdev->minor = cpu_to_le64(MINOR(dev));
5118         } else if (S_ISFIFO(mode)) {
5119                 memcpy(pdev->type, "LnxFIFO", 8);
5120         }
5121
5122         rc = server->ops->sync_write(xid, &fid, &io_parms,
5123                                      &bytes_written, iov, 1);
5124         server->ops->close(xid, tcon, &fid);
5125         d_drop(dentry);
5126         /* FIXME: add code here to set EAs */
5127         cifs_free_open_info(&buf);
5128         return rc;
5129 }
5130
5131 static inline u64 mode_nfs_type(mode_t mode)
5132 {
5133         switch (mode & S_IFMT) {
5134         case S_IFBLK: return NFS_SPECFILE_BLK;
5135         case S_IFCHR: return NFS_SPECFILE_CHR;
5136         case S_IFIFO: return NFS_SPECFILE_FIFO;
5137         case S_IFSOCK: return NFS_SPECFILE_SOCK;
5138         }
5139         return 0;
5140 }
5141
5142 static int nfs_set_reparse_buf(struct reparse_posix_data *buf,
5143                                mode_t mode, dev_t dev,
5144                                struct kvec *iov)
5145 {
5146         u64 type;
5147         u16 len, dlen;
5148
5149         len = sizeof(*buf);
5150
5151         switch ((type = mode_nfs_type(mode))) {
5152         case NFS_SPECFILE_BLK:
5153         case NFS_SPECFILE_CHR:
5154                 dlen = sizeof(__le64);
5155                 break;
5156         case NFS_SPECFILE_FIFO:
5157         case NFS_SPECFILE_SOCK:
5158                 dlen = 0;
5159                 break;
5160         default:
5161                 return -EOPNOTSUPP;
5162         }
5163
5164         buf->ReparseTag = cpu_to_le32(IO_REPARSE_TAG_NFS);
5165         buf->Reserved = 0;
5166         buf->InodeType = cpu_to_le64(type);
5167         buf->ReparseDataLength = cpu_to_le16(len + dlen -
5168                                              sizeof(struct reparse_data_buffer));
5169         *(__le64 *)buf->DataBuffer = cpu_to_le64(((u64)MAJOR(dev) << 32) |
5170                                                  MINOR(dev));
5171         iov->iov_base = buf;
5172         iov->iov_len = len + dlen;
5173         return 0;
5174 }
5175
5176 static int nfs_make_node(unsigned int xid, struct inode *inode,
5177                          struct dentry *dentry, struct cifs_tcon *tcon,
5178                          const char *full_path, umode_t mode, dev_t dev)
5179 {
5180         struct cifs_open_info_data data;
5181         struct reparse_posix_data *p;
5182         struct inode *new;
5183         struct kvec iov;
5184         __u8 buf[sizeof(*p) + sizeof(__le64)];
5185         int rc;
5186
5187         p = (struct reparse_posix_data *)buf;
5188         rc = nfs_set_reparse_buf(p, mode, dev, &iov);
5189         if (rc)
5190                 return rc;
5191
5192         data = (struct cifs_open_info_data) {
5193                 .reparse_point = true,
5194                 .reparse = { .tag = IO_REPARSE_TAG_NFS, .posix = p, },
5195         };
5196
5197         new = smb2_get_reparse_inode(&data, inode->i_sb, xid,
5198                                      tcon, full_path, &iov);
5199         if (!IS_ERR(new))
5200                 d_instantiate(dentry, new);
5201         else
5202                 rc = PTR_ERR(new);
5203         cifs_free_open_info(&data);
5204         return rc;
5205 }
5206
5207 static int smb2_create_reparse_symlink(const unsigned int xid,
5208                                        struct inode *inode,
5209                                        struct dentry *dentry,
5210                                        struct cifs_tcon *tcon,
5211                                        const char *full_path,
5212                                        const char *symname)
5213 {
5214         struct reparse_symlink_data_buffer *buf = NULL;
5215         struct cifs_open_info_data data;
5216         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
5217         struct inode *new;
5218         struct kvec iov;
5219         __le16 *path;
5220         char *sym, sep = CIFS_DIR_SEP(cifs_sb);
5221         u16 len, plen;
5222         int rc = 0;
5223
5224         sym = kstrdup(symname, GFP_KERNEL);
5225         if (!sym)
5226                 return -ENOMEM;
5227
5228         data = (struct cifs_open_info_data) {
5229                 .reparse_point = true,
5230                 .reparse = { .tag = IO_REPARSE_TAG_SYMLINK, },
5231                 .symlink_target = sym,
5232         };
5233
5234         convert_delimiter(sym, sep);
5235         path = cifs_convert_path_to_utf16(sym, cifs_sb);
5236         if (!path) {
5237                 rc = -ENOMEM;
5238                 goto out;
5239         }
5240
5241         plen = 2 * UniStrnlen((wchar_t *)path, PATH_MAX);
5242         len = sizeof(*buf) + plen * 2;
5243         buf = kzalloc(len, GFP_KERNEL);
5244         if (!buf) {
5245                 rc = -ENOMEM;
5246                 goto out;
5247         }
5248
5249         buf->ReparseTag = cpu_to_le32(IO_REPARSE_TAG_SYMLINK);
5250         buf->ReparseDataLength = cpu_to_le16(len - sizeof(struct reparse_data_buffer));
5251         buf->SubstituteNameOffset = cpu_to_le16(plen);
5252         buf->SubstituteNameLength = cpu_to_le16(plen);
5253         memcpy(&buf->PathBuffer[plen], path, plen);
5254         buf->PrintNameOffset = 0;
5255         buf->PrintNameLength = cpu_to_le16(plen);
5256         memcpy(buf->PathBuffer, path, plen);
5257         buf->Flags = cpu_to_le32(*symname != '/' ? SYMLINK_FLAG_RELATIVE : 0);
5258         if (*sym != sep)
5259                 buf->Flags = cpu_to_le32(SYMLINK_FLAG_RELATIVE);
5260
5261         convert_delimiter(sym, '/');
5262         iov.iov_base = buf;
5263         iov.iov_len = len;
5264         new = smb2_get_reparse_inode(&data, inode->i_sb, xid,
5265                                      tcon, full_path, &iov);
5266         if (!IS_ERR(new))
5267                 d_instantiate(dentry, new);
5268         else
5269                 rc = PTR_ERR(new);
5270 out:
5271         kfree(path);
5272         cifs_free_open_info(&data);
5273         kfree(buf);
5274         return rc;
5275 }
5276
5277 static int smb2_make_node(unsigned int xid, struct inode *inode,
5278                           struct dentry *dentry, struct cifs_tcon *tcon,
5279                           const char *full_path, umode_t mode, dev_t dev)
5280 {
5281         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
5282         int rc;
5283
5284         /*
5285          * Check if mounted with mount parm 'sfu' mount parm.
5286          * SFU emulation should work with all servers, but only
5287          * supports block and char device (no socket & fifo),
5288          * and was used by default in earlier versions of Windows
5289          */
5290         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
5291                 rc = cifs_sfu_make_node(xid, inode, dentry, tcon,
5292                                         full_path, mode, dev);
5293         } else {
5294                 rc = nfs_make_node(xid, inode, dentry, tcon,
5295                                    full_path, mode, dev);
5296         }
5297         return rc;
5298 }
5299
5300 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
5301 struct smb_version_operations smb20_operations = {
5302         .compare_fids = smb2_compare_fids,
5303         .setup_request = smb2_setup_request,
5304         .setup_async_request = smb2_setup_async_request,
5305         .check_receive = smb2_check_receive,
5306         .add_credits = smb2_add_credits,
5307         .set_credits = smb2_set_credits,
5308         .get_credits_field = smb2_get_credits_field,
5309         .get_credits = smb2_get_credits,
5310         .wait_mtu_credits = cifs_wait_mtu_credits,
5311         .get_next_mid = smb2_get_next_mid,
5312         .revert_current_mid = smb2_revert_current_mid,
5313         .read_data_offset = smb2_read_data_offset,
5314         .read_data_length = smb2_read_data_length,
5315         .map_error = map_smb2_to_linux_error,
5316         .find_mid = smb2_find_mid,
5317         .check_message = smb2_check_message,
5318         .dump_detail = smb2_dump_detail,
5319         .clear_stats = smb2_clear_stats,
5320         .print_stats = smb2_print_stats,
5321         .is_oplock_break = smb2_is_valid_oplock_break,
5322         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5323         .downgrade_oplock = smb2_downgrade_oplock,
5324         .need_neg = smb2_need_neg,
5325         .negotiate = smb2_negotiate,
5326         .negotiate_wsize = smb2_negotiate_wsize,
5327         .negotiate_rsize = smb2_negotiate_rsize,
5328         .sess_setup = SMB2_sess_setup,
5329         .logoff = SMB2_logoff,
5330         .tree_connect = SMB2_tcon,
5331         .tree_disconnect = SMB2_tdis,
5332         .qfs_tcon = smb2_qfs_tcon,
5333         .is_path_accessible = smb2_is_path_accessible,
5334         .can_echo = smb2_can_echo,
5335         .echo = SMB2_echo,
5336         .query_path_info = smb2_query_path_info,
5337         .query_reparse_point = smb2_query_reparse_point,
5338         .get_srv_inum = smb2_get_srv_inum,
5339         .query_file_info = smb2_query_file_info,
5340         .set_path_size = smb2_set_path_size,
5341         .set_file_size = smb2_set_file_size,
5342         .set_file_info = smb2_set_file_info,
5343         .set_compression = smb2_set_compression,
5344         .mkdir = smb2_mkdir,
5345         .mkdir_setinfo = smb2_mkdir_setinfo,
5346         .rmdir = smb2_rmdir,
5347         .unlink = smb2_unlink,
5348         .rename = smb2_rename_path,
5349         .create_hardlink = smb2_create_hardlink,
5350         .parse_reparse_point = smb2_parse_reparse_point,
5351         .query_mf_symlink = smb3_query_mf_symlink,
5352         .create_mf_symlink = smb3_create_mf_symlink,
5353         .create_reparse_symlink = smb2_create_reparse_symlink,
5354         .open = smb2_open_file,
5355         .set_fid = smb2_set_fid,
5356         .close = smb2_close_file,
5357         .flush = smb2_flush_file,
5358         .async_readv = smb2_async_readv,
5359         .async_writev = smb2_async_writev,
5360         .sync_read = smb2_sync_read,
5361         .sync_write = smb2_sync_write,
5362         .query_dir_first = smb2_query_dir_first,
5363         .query_dir_next = smb2_query_dir_next,
5364         .close_dir = smb2_close_dir,
5365         .calc_smb_size = smb2_calc_size,
5366         .is_status_pending = smb2_is_status_pending,
5367         .is_session_expired = smb2_is_session_expired,
5368         .oplock_response = smb2_oplock_response,
5369         .queryfs = smb2_queryfs,
5370         .mand_lock = smb2_mand_lock,
5371         .mand_unlock_range = smb2_unlock_range,
5372         .push_mand_locks = smb2_push_mandatory_locks,
5373         .get_lease_key = smb2_get_lease_key,
5374         .set_lease_key = smb2_set_lease_key,
5375         .new_lease_key = smb2_new_lease_key,
5376         .calc_signature = smb2_calc_signature,
5377         .is_read_op = smb2_is_read_op,
5378         .set_oplock_level = smb2_set_oplock_level,
5379         .create_lease_buf = smb2_create_lease_buf,
5380         .parse_lease_buf = smb2_parse_lease_buf,
5381         .copychunk_range = smb2_copychunk_range,
5382         .wp_retry_size = smb2_wp_retry_size,
5383         .dir_needs_close = smb2_dir_needs_close,
5384         .get_dfs_refer = smb2_get_dfs_refer,
5385         .select_sectype = smb2_select_sectype,
5386 #ifdef CONFIG_CIFS_XATTR
5387         .query_all_EAs = smb2_query_eas,
5388         .set_EA = smb2_set_ea,
5389 #endif /* CIFS_XATTR */
5390         .get_acl = get_smb2_acl,
5391         .get_acl_by_fid = get_smb2_acl_by_fid,
5392         .set_acl = set_smb2_acl,
5393         .next_header = smb2_next_header,
5394         .ioctl_query_info = smb2_ioctl_query_info,
5395         .make_node = smb2_make_node,
5396         .fiemap = smb3_fiemap,
5397         .llseek = smb3_llseek,
5398         .is_status_io_timeout = smb2_is_status_io_timeout,
5399         .is_network_name_deleted = smb2_is_network_name_deleted,
5400 };
5401 #endif /* CIFS_ALLOW_INSECURE_LEGACY */
5402
5403 struct smb_version_operations smb21_operations = {
5404         .compare_fids = smb2_compare_fids,
5405         .setup_request = smb2_setup_request,
5406         .setup_async_request = smb2_setup_async_request,
5407         .check_receive = smb2_check_receive,
5408         .add_credits = smb2_add_credits,
5409         .set_credits = smb2_set_credits,
5410         .get_credits_field = smb2_get_credits_field,
5411         .get_credits = smb2_get_credits,
5412         .wait_mtu_credits = smb2_wait_mtu_credits,
5413         .adjust_credits = smb2_adjust_credits,
5414         .get_next_mid = smb2_get_next_mid,
5415         .revert_current_mid = smb2_revert_current_mid,
5416         .read_data_offset = smb2_read_data_offset,
5417         .read_data_length = smb2_read_data_length,
5418         .map_error = map_smb2_to_linux_error,
5419         .find_mid = smb2_find_mid,
5420         .check_message = smb2_check_message,
5421         .dump_detail = smb2_dump_detail,
5422         .clear_stats = smb2_clear_stats,
5423         .print_stats = smb2_print_stats,
5424         .is_oplock_break = smb2_is_valid_oplock_break,
5425         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5426         .downgrade_oplock = smb2_downgrade_oplock,
5427         .need_neg = smb2_need_neg,
5428         .negotiate = smb2_negotiate,
5429         .negotiate_wsize = smb2_negotiate_wsize,
5430         .negotiate_rsize = smb2_negotiate_rsize,
5431         .sess_setup = SMB2_sess_setup,
5432         .logoff = SMB2_logoff,
5433         .tree_connect = SMB2_tcon,
5434         .tree_disconnect = SMB2_tdis,
5435         .qfs_tcon = smb2_qfs_tcon,
5436         .is_path_accessible = smb2_is_path_accessible,
5437         .can_echo = smb2_can_echo,
5438         .echo = SMB2_echo,
5439         .query_path_info = smb2_query_path_info,
5440         .query_reparse_point = smb2_query_reparse_point,
5441         .get_srv_inum = smb2_get_srv_inum,
5442         .query_file_info = smb2_query_file_info,
5443         .set_path_size = smb2_set_path_size,
5444         .set_file_size = smb2_set_file_size,
5445         .set_file_info = smb2_set_file_info,
5446         .set_compression = smb2_set_compression,
5447         .mkdir = smb2_mkdir,
5448         .mkdir_setinfo = smb2_mkdir_setinfo,
5449         .rmdir = smb2_rmdir,
5450         .unlink = smb2_unlink,
5451         .rename = smb2_rename_path,
5452         .create_hardlink = smb2_create_hardlink,
5453         .parse_reparse_point = smb2_parse_reparse_point,
5454         .query_mf_symlink = smb3_query_mf_symlink,
5455         .create_mf_symlink = smb3_create_mf_symlink,
5456         .create_reparse_symlink = smb2_create_reparse_symlink,
5457         .open = smb2_open_file,
5458         .set_fid = smb2_set_fid,
5459         .close = smb2_close_file,
5460         .flush = smb2_flush_file,
5461         .async_readv = smb2_async_readv,
5462         .async_writev = smb2_async_writev,
5463         .sync_read = smb2_sync_read,
5464         .sync_write = smb2_sync_write,
5465         .query_dir_first = smb2_query_dir_first,
5466         .query_dir_next = smb2_query_dir_next,
5467         .close_dir = smb2_close_dir,
5468         .calc_smb_size = smb2_calc_size,
5469         .is_status_pending = smb2_is_status_pending,
5470         .is_session_expired = smb2_is_session_expired,
5471         .oplock_response = smb2_oplock_response,
5472         .queryfs = smb2_queryfs,
5473         .mand_lock = smb2_mand_lock,
5474         .mand_unlock_range = smb2_unlock_range,
5475         .push_mand_locks = smb2_push_mandatory_locks,
5476         .get_lease_key = smb2_get_lease_key,
5477         .set_lease_key = smb2_set_lease_key,
5478         .new_lease_key = smb2_new_lease_key,
5479         .calc_signature = smb2_calc_signature,
5480         .is_read_op = smb21_is_read_op,
5481         .set_oplock_level = smb21_set_oplock_level,
5482         .create_lease_buf = smb2_create_lease_buf,
5483         .parse_lease_buf = smb2_parse_lease_buf,
5484         .copychunk_range = smb2_copychunk_range,
5485         .wp_retry_size = smb2_wp_retry_size,
5486         .dir_needs_close = smb2_dir_needs_close,
5487         .enum_snapshots = smb3_enum_snapshots,
5488         .notify = smb3_notify,
5489         .get_dfs_refer = smb2_get_dfs_refer,
5490         .select_sectype = smb2_select_sectype,
5491 #ifdef CONFIG_CIFS_XATTR
5492         .query_all_EAs = smb2_query_eas,
5493         .set_EA = smb2_set_ea,
5494 #endif /* CIFS_XATTR */
5495         .get_acl = get_smb2_acl,
5496         .get_acl_by_fid = get_smb2_acl_by_fid,
5497         .set_acl = set_smb2_acl,
5498         .next_header = smb2_next_header,
5499         .ioctl_query_info = smb2_ioctl_query_info,
5500         .make_node = smb2_make_node,
5501         .fiemap = smb3_fiemap,
5502         .llseek = smb3_llseek,
5503         .is_status_io_timeout = smb2_is_status_io_timeout,
5504         .is_network_name_deleted = smb2_is_network_name_deleted,
5505 };
5506
5507 struct smb_version_operations smb30_operations = {
5508         .compare_fids = smb2_compare_fids,
5509         .setup_request = smb2_setup_request,
5510         .setup_async_request = smb2_setup_async_request,
5511         .check_receive = smb2_check_receive,
5512         .add_credits = smb2_add_credits,
5513         .set_credits = smb2_set_credits,
5514         .get_credits_field = smb2_get_credits_field,
5515         .get_credits = smb2_get_credits,
5516         .wait_mtu_credits = smb2_wait_mtu_credits,
5517         .adjust_credits = smb2_adjust_credits,
5518         .get_next_mid = smb2_get_next_mid,
5519         .revert_current_mid = smb2_revert_current_mid,
5520         .read_data_offset = smb2_read_data_offset,
5521         .read_data_length = smb2_read_data_length,
5522         .map_error = map_smb2_to_linux_error,
5523         .find_mid = smb2_find_mid,
5524         .check_message = smb2_check_message,
5525         .dump_detail = smb2_dump_detail,
5526         .clear_stats = smb2_clear_stats,
5527         .print_stats = smb2_print_stats,
5528         .dump_share_caps = smb2_dump_share_caps,
5529         .is_oplock_break = smb2_is_valid_oplock_break,
5530         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5531         .downgrade_oplock = smb3_downgrade_oplock,
5532         .need_neg = smb2_need_neg,
5533         .negotiate = smb2_negotiate,
5534         .negotiate_wsize = smb3_negotiate_wsize,
5535         .negotiate_rsize = smb3_negotiate_rsize,
5536         .sess_setup = SMB2_sess_setup,
5537         .logoff = SMB2_logoff,
5538         .tree_connect = SMB2_tcon,
5539         .tree_disconnect = SMB2_tdis,
5540         .qfs_tcon = smb3_qfs_tcon,
5541         .is_path_accessible = smb2_is_path_accessible,
5542         .can_echo = smb2_can_echo,
5543         .echo = SMB2_echo,
5544         .query_path_info = smb2_query_path_info,
5545         /* WSL tags introduced long after smb2.1, enable for SMB3, 3.11 only */
5546         .query_reparse_point = smb2_query_reparse_point,
5547         .get_srv_inum = smb2_get_srv_inum,
5548         .query_file_info = smb2_query_file_info,
5549         .set_path_size = smb2_set_path_size,
5550         .set_file_size = smb2_set_file_size,
5551         .set_file_info = smb2_set_file_info,
5552         .set_compression = smb2_set_compression,
5553         .mkdir = smb2_mkdir,
5554         .mkdir_setinfo = smb2_mkdir_setinfo,
5555         .rmdir = smb2_rmdir,
5556         .unlink = smb2_unlink,
5557         .rename = smb2_rename_path,
5558         .create_hardlink = smb2_create_hardlink,
5559         .parse_reparse_point = smb2_parse_reparse_point,
5560         .query_mf_symlink = smb3_query_mf_symlink,
5561         .create_mf_symlink = smb3_create_mf_symlink,
5562         .create_reparse_symlink = smb2_create_reparse_symlink,
5563         .open = smb2_open_file,
5564         .set_fid = smb2_set_fid,
5565         .close = smb2_close_file,
5566         .close_getattr = smb2_close_getattr,
5567         .flush = smb2_flush_file,
5568         .async_readv = smb2_async_readv,
5569         .async_writev = smb2_async_writev,
5570         .sync_read = smb2_sync_read,
5571         .sync_write = smb2_sync_write,
5572         .query_dir_first = smb2_query_dir_first,
5573         .query_dir_next = smb2_query_dir_next,
5574         .close_dir = smb2_close_dir,
5575         .calc_smb_size = smb2_calc_size,
5576         .is_status_pending = smb2_is_status_pending,
5577         .is_session_expired = smb2_is_session_expired,
5578         .oplock_response = smb2_oplock_response,
5579         .queryfs = smb2_queryfs,
5580         .mand_lock = smb2_mand_lock,
5581         .mand_unlock_range = smb2_unlock_range,
5582         .push_mand_locks = smb2_push_mandatory_locks,
5583         .get_lease_key = smb2_get_lease_key,
5584         .set_lease_key = smb2_set_lease_key,
5585         .new_lease_key = smb2_new_lease_key,
5586         .generate_signingkey = generate_smb30signingkey,
5587         .calc_signature = smb3_calc_signature,
5588         .set_integrity  = smb3_set_integrity,
5589         .is_read_op = smb21_is_read_op,
5590         .set_oplock_level = smb3_set_oplock_level,
5591         .create_lease_buf = smb3_create_lease_buf,
5592         .parse_lease_buf = smb3_parse_lease_buf,
5593         .copychunk_range = smb2_copychunk_range,
5594         .duplicate_extents = smb2_duplicate_extents,
5595         .validate_negotiate = smb3_validate_negotiate,
5596         .wp_retry_size = smb2_wp_retry_size,
5597         .dir_needs_close = smb2_dir_needs_close,
5598         .fallocate = smb3_fallocate,
5599         .enum_snapshots = smb3_enum_snapshots,
5600         .notify = smb3_notify,
5601         .init_transform_rq = smb3_init_transform_rq,
5602         .is_transform_hdr = smb3_is_transform_hdr,
5603         .receive_transform = smb3_receive_transform,
5604         .get_dfs_refer = smb2_get_dfs_refer,
5605         .select_sectype = smb2_select_sectype,
5606 #ifdef CONFIG_CIFS_XATTR
5607         .query_all_EAs = smb2_query_eas,
5608         .set_EA = smb2_set_ea,
5609 #endif /* CIFS_XATTR */
5610         .get_acl = get_smb2_acl,
5611         .get_acl_by_fid = get_smb2_acl_by_fid,
5612         .set_acl = set_smb2_acl,
5613         .next_header = smb2_next_header,
5614         .ioctl_query_info = smb2_ioctl_query_info,
5615         .make_node = smb2_make_node,
5616         .fiemap = smb3_fiemap,
5617         .llseek = smb3_llseek,
5618         .is_status_io_timeout = smb2_is_status_io_timeout,
5619         .is_network_name_deleted = smb2_is_network_name_deleted,
5620 };
5621
5622 struct smb_version_operations smb311_operations = {
5623         .compare_fids = smb2_compare_fids,
5624         .setup_request = smb2_setup_request,
5625         .setup_async_request = smb2_setup_async_request,
5626         .check_receive = smb2_check_receive,
5627         .add_credits = smb2_add_credits,
5628         .set_credits = smb2_set_credits,
5629         .get_credits_field = smb2_get_credits_field,
5630         .get_credits = smb2_get_credits,
5631         .wait_mtu_credits = smb2_wait_mtu_credits,
5632         .adjust_credits = smb2_adjust_credits,
5633         .get_next_mid = smb2_get_next_mid,
5634         .revert_current_mid = smb2_revert_current_mid,
5635         .read_data_offset = smb2_read_data_offset,
5636         .read_data_length = smb2_read_data_length,
5637         .map_error = map_smb2_to_linux_error,
5638         .find_mid = smb2_find_mid,
5639         .check_message = smb2_check_message,
5640         .dump_detail = smb2_dump_detail,
5641         .clear_stats = smb2_clear_stats,
5642         .print_stats = smb2_print_stats,
5643         .dump_share_caps = smb2_dump_share_caps,
5644         .is_oplock_break = smb2_is_valid_oplock_break,
5645         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5646         .downgrade_oplock = smb3_downgrade_oplock,
5647         .need_neg = smb2_need_neg,
5648         .negotiate = smb2_negotiate,
5649         .negotiate_wsize = smb3_negotiate_wsize,
5650         .negotiate_rsize = smb3_negotiate_rsize,
5651         .sess_setup = SMB2_sess_setup,
5652         .logoff = SMB2_logoff,
5653         .tree_connect = SMB2_tcon,
5654         .tree_disconnect = SMB2_tdis,
5655         .qfs_tcon = smb3_qfs_tcon,
5656         .is_path_accessible = smb2_is_path_accessible,
5657         .can_echo = smb2_can_echo,
5658         .echo = SMB2_echo,
5659         .query_path_info = smb2_query_path_info,
5660         .query_reparse_point = smb2_query_reparse_point,
5661         .get_srv_inum = smb2_get_srv_inum,
5662         .query_file_info = smb2_query_file_info,
5663         .set_path_size = smb2_set_path_size,
5664         .set_file_size = smb2_set_file_size,
5665         .set_file_info = smb2_set_file_info,
5666         .set_compression = smb2_set_compression,
5667         .mkdir = smb2_mkdir,
5668         .mkdir_setinfo = smb2_mkdir_setinfo,
5669         .posix_mkdir = smb311_posix_mkdir,
5670         .rmdir = smb2_rmdir,
5671         .unlink = smb2_unlink,
5672         .rename = smb2_rename_path,
5673         .create_hardlink = smb2_create_hardlink,
5674         .parse_reparse_point = smb2_parse_reparse_point,
5675         .query_mf_symlink = smb3_query_mf_symlink,
5676         .create_mf_symlink = smb3_create_mf_symlink,
5677         .create_reparse_symlink = smb2_create_reparse_symlink,
5678         .open = smb2_open_file,
5679         .set_fid = smb2_set_fid,
5680         .close = smb2_close_file,
5681         .close_getattr = smb2_close_getattr,
5682         .flush = smb2_flush_file,
5683         .async_readv = smb2_async_readv,
5684         .async_writev = smb2_async_writev,
5685         .sync_read = smb2_sync_read,
5686         .sync_write = smb2_sync_write,
5687         .query_dir_first = smb2_query_dir_first,
5688         .query_dir_next = smb2_query_dir_next,
5689         .close_dir = smb2_close_dir,
5690         .calc_smb_size = smb2_calc_size,
5691         .is_status_pending = smb2_is_status_pending,
5692         .is_session_expired = smb2_is_session_expired,
5693         .oplock_response = smb2_oplock_response,
5694         .queryfs = smb311_queryfs,
5695         .mand_lock = smb2_mand_lock,
5696         .mand_unlock_range = smb2_unlock_range,
5697         .push_mand_locks = smb2_push_mandatory_locks,
5698         .get_lease_key = smb2_get_lease_key,
5699         .set_lease_key = smb2_set_lease_key,
5700         .new_lease_key = smb2_new_lease_key,
5701         .generate_signingkey = generate_smb311signingkey,
5702         .calc_signature = smb3_calc_signature,
5703         .set_integrity  = smb3_set_integrity,
5704         .is_read_op = smb21_is_read_op,
5705         .set_oplock_level = smb3_set_oplock_level,
5706         .create_lease_buf = smb3_create_lease_buf,
5707         .parse_lease_buf = smb3_parse_lease_buf,
5708         .copychunk_range = smb2_copychunk_range,
5709         .duplicate_extents = smb2_duplicate_extents,
5710 /*      .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
5711         .wp_retry_size = smb2_wp_retry_size,
5712         .dir_needs_close = smb2_dir_needs_close,
5713         .fallocate = smb3_fallocate,
5714         .enum_snapshots = smb3_enum_snapshots,
5715         .notify = smb3_notify,
5716         .init_transform_rq = smb3_init_transform_rq,
5717         .is_transform_hdr = smb3_is_transform_hdr,
5718         .receive_transform = smb3_receive_transform,
5719         .get_dfs_refer = smb2_get_dfs_refer,
5720         .select_sectype = smb2_select_sectype,
5721 #ifdef CONFIG_CIFS_XATTR
5722         .query_all_EAs = smb2_query_eas,
5723         .set_EA = smb2_set_ea,
5724 #endif /* CIFS_XATTR */
5725         .get_acl = get_smb2_acl,
5726         .get_acl_by_fid = get_smb2_acl_by_fid,
5727         .set_acl = set_smb2_acl,
5728         .next_header = smb2_next_header,
5729         .ioctl_query_info = smb2_ioctl_query_info,
5730         .make_node = smb2_make_node,
5731         .fiemap = smb3_fiemap,
5732         .llseek = smb3_llseek,
5733         .is_status_io_timeout = smb2_is_status_io_timeout,
5734         .is_network_name_deleted = smb2_is_network_name_deleted,
5735 };
5736
5737 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
5738 struct smb_version_values smb20_values = {
5739         .version_string = SMB20_VERSION_STRING,
5740         .protocol_id = SMB20_PROT_ID,
5741         .req_capabilities = 0, /* MBZ */
5742         .large_lock_type = 0,
5743         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5744         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5745         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5746         .header_size = sizeof(struct smb2_hdr),
5747         .header_preamble_size = 0,
5748         .max_header_size = MAX_SMB2_HDR_SIZE,
5749         .read_rsp_size = sizeof(struct smb2_read_rsp),
5750         .lock_cmd = SMB2_LOCK,
5751         .cap_unix = 0,
5752         .cap_nt_find = SMB2_NT_FIND,
5753         .cap_large_files = SMB2_LARGE_FILES,
5754         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5755         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5756         .create_lease_size = sizeof(struct create_lease),
5757 };
5758 #endif /* ALLOW_INSECURE_LEGACY */
5759
5760 struct smb_version_values smb21_values = {
5761         .version_string = SMB21_VERSION_STRING,
5762         .protocol_id = SMB21_PROT_ID,
5763         .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
5764         .large_lock_type = 0,
5765         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5766         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5767         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5768         .header_size = sizeof(struct smb2_hdr),
5769         .header_preamble_size = 0,
5770         .max_header_size = MAX_SMB2_HDR_SIZE,
5771         .read_rsp_size = sizeof(struct smb2_read_rsp),
5772         .lock_cmd = SMB2_LOCK,
5773         .cap_unix = 0,
5774         .cap_nt_find = SMB2_NT_FIND,
5775         .cap_large_files = SMB2_LARGE_FILES,
5776         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5777         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5778         .create_lease_size = sizeof(struct create_lease),
5779 };
5780
5781 struct smb_version_values smb3any_values = {
5782         .version_string = SMB3ANY_VERSION_STRING,
5783         .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
5784         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
5785         .large_lock_type = 0,
5786         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5787         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5788         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5789         .header_size = sizeof(struct smb2_hdr),
5790         .header_preamble_size = 0,
5791         .max_header_size = MAX_SMB2_HDR_SIZE,
5792         .read_rsp_size = sizeof(struct smb2_read_rsp),
5793         .lock_cmd = SMB2_LOCK,
5794         .cap_unix = 0,
5795         .cap_nt_find = SMB2_NT_FIND,
5796         .cap_large_files = SMB2_LARGE_FILES,
5797         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5798         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5799         .create_lease_size = sizeof(struct create_lease_v2),
5800 };
5801
5802 struct smb_version_values smbdefault_values = {
5803         .version_string = SMBDEFAULT_VERSION_STRING,
5804         .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
5805         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
5806         .large_lock_type = 0,
5807         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5808         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5809         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5810         .header_size = sizeof(struct smb2_hdr),
5811         .header_preamble_size = 0,
5812         .max_header_size = MAX_SMB2_HDR_SIZE,
5813         .read_rsp_size = sizeof(struct smb2_read_rsp),
5814         .lock_cmd = SMB2_LOCK,
5815         .cap_unix = 0,
5816         .cap_nt_find = SMB2_NT_FIND,
5817         .cap_large_files = SMB2_LARGE_FILES,
5818         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5819         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5820         .create_lease_size = sizeof(struct create_lease_v2),
5821 };
5822
5823 struct smb_version_values smb30_values = {
5824         .version_string = SMB30_VERSION_STRING,
5825         .protocol_id = SMB30_PROT_ID,
5826         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
5827         .large_lock_type = 0,
5828         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5829         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5830         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5831         .header_size = sizeof(struct smb2_hdr),
5832         .header_preamble_size = 0,
5833         .max_header_size = MAX_SMB2_HDR_SIZE,
5834         .read_rsp_size = sizeof(struct smb2_read_rsp),
5835         .lock_cmd = SMB2_LOCK,
5836         .cap_unix = 0,
5837         .cap_nt_find = SMB2_NT_FIND,
5838         .cap_large_files = SMB2_LARGE_FILES,
5839         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5840         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5841         .create_lease_size = sizeof(struct create_lease_v2),
5842 };
5843
5844 struct smb_version_values smb302_values = {
5845         .version_string = SMB302_VERSION_STRING,
5846         .protocol_id = SMB302_PROT_ID,
5847         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
5848         .large_lock_type = 0,
5849         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5850         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5851         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5852         .header_size = sizeof(struct smb2_hdr),
5853         .header_preamble_size = 0,
5854         .max_header_size = MAX_SMB2_HDR_SIZE,
5855         .read_rsp_size = sizeof(struct smb2_read_rsp),
5856         .lock_cmd = SMB2_LOCK,
5857         .cap_unix = 0,
5858         .cap_nt_find = SMB2_NT_FIND,
5859         .cap_large_files = SMB2_LARGE_FILES,
5860         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5861         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5862         .create_lease_size = sizeof(struct create_lease_v2),
5863 };
5864
5865 struct smb_version_values smb311_values = {
5866         .version_string = SMB311_VERSION_STRING,
5867         .protocol_id = SMB311_PROT_ID,
5868         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
5869         .large_lock_type = 0,
5870         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5871         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5872         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5873         .header_size = sizeof(struct smb2_hdr),
5874         .header_preamble_size = 0,
5875         .max_header_size = MAX_SMB2_HDR_SIZE,
5876         .read_rsp_size = sizeof(struct smb2_read_rsp),
5877         .lock_cmd = SMB2_LOCK,
5878         .cap_unix = 0,
5879         .cap_nt_find = SMB2_NT_FIND,
5880         .cap_large_files = SMB2_LARGE_FILES,
5881         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5882         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5883         .create_lease_size = sizeof(struct create_lease_v2),
5884 };