fs/cifs/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 "cifsfs.h"
  16 #include "cifsglob.h"
  17 #include "smb2pdu.h"
  18 #include "smb2proto.h"
  19 #include "cifsproto.h"
  20 #include "cifs_debug.h"
  21 #include "cifs_unicode.h"
  22 #include "smb2status.h"
  23 #include "smb2glob.h"
  24 #include "cifs_ioctl.h"
  25 #include "smbdirect.h"
  26
  27 /* Change credits for different ops and return the total number of credits */
  28 static int
  29 change_conf(struct TCP_Server_Info *server)
  30 {
  31         server->credits += server->echo_credits + server->oplock_credits;
  32         server->oplock_credits = server->echo_credits = 0;
  33         switch (server->credits) {
  34         case 0:
  35                 return 0;
  36         case 1:
  37                 server->echoes = false;
  38                 server->oplocks = false;
  39                 break;
  40         case 2:
  41                 server->echoes = true;
  42                 server->oplocks = false;
  43                 server->echo_credits = 1;
  44                 break;
  45         default:
  46                 server->echoes = true;
  47                 if (enable_oplocks) {
  48                         server->oplocks = true;
  49                         server->oplock_credits = 1;
  50                 } else
  51                         server->oplocks = false;
  52
  53                 server->echo_credits = 1;
  54         }
  55         server->credits -= server->echo_credits + server->oplock_credits;
  56         return server->credits + server->echo_credits + server->oplock_credits;
  57 }
  58
  59 static void
  60 smb2_add_credits(struct TCP_Server_Info *server,
  61                  const struct cifs_credits *credits, const int optype)
  62 {
  63         int *val, rc = -1;
  64         unsigned int add = credits->value;
  65         unsigned int instance = credits->instance;
  66         bool reconnect_detected = false;
  67
  68         spin_lock(&server->req_lock);
  69         val = server->ops->get_credits_field(server, optype);
  70
  71         /* eg found case where write overlapping reconnect messed up credits */
  72         if (((optype & CIFS_OP_MASK) == CIFS_NEG_OP) && (*val != 0))
  73                 trace_smb3_reconnect_with_invalid_credits(server->CurrentMid,
  74                         server->hostname, *val);
  75         if ((instance == 0) || (instance == server->reconnect_instance))
  76                 *val += add;
  77         else
  78                 reconnect_detected = true;
  79
  80         if (*val > 65000) {
  81                 *val = 65000; /* Don't get near 64K credits, avoid srv bugs */
  82                 printk_once(KERN_WARNING "server overflowed SMB3 credits\n");
  83         }
  84         server->in_flight--;
  85         if (server->in_flight == 0 && (optype & CIFS_OP_MASK) != CIFS_NEG_OP)
  86                 rc = change_conf(server);
  87         /*
  88          * Sometimes server returns 0 credits on oplock break ack - we need to
  89          * rebalance credits in this case.
  90          */
  91         else if (server->in_flight > 0 && server->oplock_credits == 0 &&
  92                  server->oplocks) {
  93                 if (server->credits > 1) {
  94                         server->credits--;
  95                         server->oplock_credits++;
  96                 }
  97         }
  98         spin_unlock(&server->req_lock);
  99         wake_up(&server->request_q);
 100
 101         if (reconnect_detected)
 102                 cifs_dbg(FYI, "trying to put %d credits from the old server instance %d\n",
 103                          add, instance);
 104
 105         if (server->tcpStatus == CifsNeedReconnect
 106             || server->tcpStatus == CifsExiting)
 107                 return;
 108
 109         switch (rc) {
 110         case -1:
 111                 /* change_conf hasn't been executed */
 112                 break;
 113         case 0:
 114                 cifs_server_dbg(VFS, "Possible client or server bug - zero credits\n");
 115                 break;
 116         case 1:
 117                 cifs_server_dbg(VFS, "disabling echoes and oplocks\n");
 118                 break;
 119         case 2:
 120                 cifs_dbg(FYI, "disabling oplocks\n");
 121                 break;
 122         default:
 123                 cifs_dbg(FYI, "add %u credits total=%d\n", add, rc);
 124         }
 125 }
 126
 127 static void
 128 smb2_set_credits(struct TCP_Server_Info *server, const int val)
 129 {
 130         spin_lock(&server->req_lock);
 131         server->credits = val;
 132         if (val == 1)
 133                 server->reconnect_instance++;
 134         spin_unlock(&server->req_lock);
 135         /* don't log while holding the lock */
 136         if (val == 1)
 137                 cifs_dbg(FYI, "set credits to 1 due to smb2 reconnect\n");
 138 }
 139
 140 static int *
 141 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
 142 {
 143         switch (optype) {
 144         case CIFS_ECHO_OP:
 145                 return &server->echo_credits;
 146         case CIFS_OBREAK_OP:
 147                 return &server->oplock_credits;
 148         default:
 149                 return &server->credits;
 150         }
 151 }
 152
 153 static unsigned int
 154 smb2_get_credits(struct mid_q_entry *mid)
 155 {
 156         return mid->credits_received;
 157 }
 158
 159 static int
 160 smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
 161                       unsigned int *num, struct cifs_credits *credits)
 162 {
 163         int rc = 0;
 164         unsigned int scredits;
 165
 166         spin_lock(&server->req_lock);
 167         while (1) {
 168                 if (server->credits <= 0) {
 169                         spin_unlock(&server->req_lock);
 170                         cifs_num_waiters_inc(server);
 171                         rc = wait_event_killable(server->request_q,
 172                                 has_credits(server, &server->credits, 1));
 173                         cifs_num_waiters_dec(server);
 174                         if (rc)
 175                                 return rc;
 176                         spin_lock(&server->req_lock);
 177                 } else {
 178                         if (server->tcpStatus == CifsExiting) {
 179                                 spin_unlock(&server->req_lock);
 180                                 return -ENOENT;
 181                         }
 182
 183                         scredits = server->credits;
 184                         /* can deadlock with reopen */
 185                         if (scredits <= 8) {
 186                                 *num = SMB2_MAX_BUFFER_SIZE;
 187                                 credits->value = 0;
 188                                 credits->instance = 0;
 189                                 break;
 190                         }
 191
 192                         /* leave some credits for reopen and other ops */
 193                         scredits -= 8;
 194                         *num = min_t(unsigned int, size,
 195                                      scredits * SMB2_MAX_BUFFER_SIZE);
 196
 197                         credits->value =
 198                                 DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE);
 199                         credits->instance = server->reconnect_instance;
 200                         server->credits -= credits->value;
 201                         server->in_flight++;
 202                         if (server->in_flight > server->max_in_flight)
 203                                 server->max_in_flight = server->in_flight;
 204                         break;
 205                 }
 206         }
 207         spin_unlock(&server->req_lock);
 208         return rc;
 209 }
 210
 211 static int
 212 smb2_adjust_credits(struct TCP_Server_Info *server,
 213                     struct cifs_credits *credits,
 214                     const unsigned int payload_size)
 215 {
 216         int new_val = DIV_ROUND_UP(payload_size, SMB2_MAX_BUFFER_SIZE);
 217
 218         if (!credits->value || credits->value == new_val)
 219                 return 0;
 220
 221         if (credits->value < new_val) {
 222                 WARN_ONCE(1, "request has less credits (%d) than required (%d)",
 223                           credits->value, new_val);
 224                 return -ENOTSUPP;
 225         }
 226
 227         spin_lock(&server->req_lock);
 228
 229         if (server->reconnect_instance != credits->instance) {
 230                 spin_unlock(&server->req_lock);
 231                 cifs_server_dbg(VFS, "trying to return %d credits to old session\n",
 232                          credits->value - new_val);
 233                 return -EAGAIN;
 234         }
 235
 236         server->credits += credits->value - new_val;
 237         spin_unlock(&server->req_lock);
 238         wake_up(&server->request_q);
 239         credits->value = new_val;
 240         return 0;
 241 }
 242
 243 static __u64
 244 smb2_get_next_mid(struct TCP_Server_Info *server)
 245 {
 246         __u64 mid;
 247         /* for SMB2 we need the current value */
 248         spin_lock(&GlobalMid_Lock);
 249         mid = server->CurrentMid++;
 250         spin_unlock(&GlobalMid_Lock);
 251         return mid;
 252 }
 253
 254 static void
 255 smb2_revert_current_mid(struct TCP_Server_Info *server, const unsigned int val)
 256 {
 257         spin_lock(&GlobalMid_Lock);
 258         if (server->CurrentMid >= val)
 259                 server->CurrentMid -= val;
 260         spin_unlock(&GlobalMid_Lock);
 261 }
 262
 263 static struct mid_q_entry *
 264 smb2_find_mid(struct TCP_Server_Info *server, char *buf)
 265 {
 266         struct mid_q_entry *mid;
 267         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
 268         __u64 wire_mid = le64_to_cpu(shdr->MessageId);
 269
 270         if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
 271                 cifs_server_dbg(VFS, "Encrypted frame parsing not supported yet\n");
 272                 return NULL;
 273         }
 274
 275         spin_lock(&GlobalMid_Lock);
 276         list_for_each_entry(mid, &server->pending_mid_q, qhead) {
 277                 if ((mid->mid == wire_mid) &&
 278                     (mid->mid_state == MID_REQUEST_SUBMITTED) &&
 279                     (mid->command == shdr->Command)) {
 280                         kref_get(&mid->refcount);
 281                         spin_unlock(&GlobalMid_Lock);
 282                         return mid;
 283                 }
 284         }
 285         spin_unlock(&GlobalMid_Lock);
 286         return NULL;
 287 }
 288
 289 static void
 290 smb2_dump_detail(void *buf, struct TCP_Server_Info *server)
 291 {
 292 #ifdef CONFIG_CIFS_DEBUG2
 293         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
 294
 295         cifs_server_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
 296                  shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId,
 297                  shdr->ProcessId);
 298         cifs_server_dbg(VFS, "smb buf %p len %u\n", buf,
 299                  server->ops->calc_smb_size(buf, server));
 300 #endif
 301 }
 302
 303 static bool
 304 smb2_need_neg(struct TCP_Server_Info *server)
 305 {
 306         return server->max_read == 0;
 307 }
 308
 309 static int
 310 smb2_negotiate(const unsigned int xid, struct cifs_ses *ses)
 311 {
 312         int rc;
 313
 314         cifs_ses_server(ses)->CurrentMid = 0;
 315         rc = SMB2_negotiate(xid, ses);
 316         /* BB we probably don't need to retry with modern servers */
 317         if (rc == -EAGAIN)
 318                 rc = -EHOSTDOWN;
 319         return rc;
 320 }
 321
 322 static unsigned int
 323 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 324 {
 325         struct TCP_Server_Info *server = tcon->ses->server;
 326         unsigned int wsize;
 327
 328         /* start with specified wsize, or default */
 329         wsize = volume_info->wsize ? volume_info->wsize : CIFS_DEFAULT_IOSIZE;
 330         wsize = min_t(unsigned int, wsize, server->max_write);
 331         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 332                 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
 333
 334         return wsize;
 335 }
 336
 337 static unsigned int
 338 smb3_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 339 {
 340         struct TCP_Server_Info *server = tcon->ses->server;
 341         unsigned int wsize;
 342
 343         /* start with specified wsize, or default */
 344         wsize = volume_info->wsize ? volume_info->wsize : SMB3_DEFAULT_IOSIZE;
 345         wsize = min_t(unsigned int, wsize, server->max_write);
 346 #ifdef CONFIG_CIFS_SMB_DIRECT
 347         if (server->rdma) {
 348                 if (server->sign)
 349                         /*
 350                          * Account for SMB2 data transfer packet header and
 351                          * possible encryption header
 352                          */
 353                         wsize = min_t(unsigned int,
 354                                 wsize,
 355                                 server->smbd_conn->max_fragmented_send_size -
 356                                         SMB2_READWRITE_PDU_HEADER_SIZE -
 357                                         sizeof(struct smb2_transform_hdr));
 358                 else
 359                         wsize = min_t(unsigned int,
 360                                 wsize, server->smbd_conn->max_readwrite_size);
 361         }
 362 #endif
 363         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 364                 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
 365
 366         return wsize;
 367 }
 368
 369 static unsigned int
 370 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 371 {
 372         struct TCP_Server_Info *server = tcon->ses->server;
 373         unsigned int rsize;
 374
 375         /* start with specified rsize, or default */
 376         rsize = volume_info->rsize ? volume_info->rsize : CIFS_DEFAULT_IOSIZE;
 377         rsize = min_t(unsigned int, rsize, server->max_read);
 378
 379         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 380                 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
 381
 382         return rsize;
 383 }
 384
 385 static unsigned int
 386 smb3_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 387 {
 388         struct TCP_Server_Info *server = tcon->ses->server;
 389         unsigned int rsize;
 390
 391         /* start with specified rsize, or default */
 392         rsize = volume_info->rsize ? volume_info->rsize : SMB3_DEFAULT_IOSIZE;
 393         rsize = min_t(unsigned int, rsize, server->max_read);
 394 #ifdef CONFIG_CIFS_SMB_DIRECT
 395         if (server->rdma) {
 396                 if (server->sign)
 397                         /*
 398                          * Account for SMB2 data transfer packet header and
 399                          * possible encryption header
 400                          */
 401                         rsize = min_t(unsigned int,
 402                                 rsize,
 403                                 server->smbd_conn->max_fragmented_recv_size -
 404                                         SMB2_READWRITE_PDU_HEADER_SIZE -
 405                                         sizeof(struct smb2_transform_hdr));
 406                 else
 407                         rsize = min_t(unsigned int,
 408                                 rsize, server->smbd_conn->max_readwrite_size);
 409         }
 410 #endif
 411
 412         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 413                 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
 414
 415         return rsize;
 416 }
 417
 418 static int
 419 parse_server_interfaces(struct network_interface_info_ioctl_rsp *buf,
 420                         size_t buf_len,
 421                         struct cifs_server_iface **iface_list,
 422                         size_t *iface_count)
 423 {
 424         struct network_interface_info_ioctl_rsp *p;
 425         struct sockaddr_in *addr4;
 426         struct sockaddr_in6 *addr6;
 427         struct iface_info_ipv4 *p4;
 428         struct iface_info_ipv6 *p6;
 429         struct cifs_server_iface *info;
 430         ssize_t bytes_left;
 431         size_t next = 0;
 432         int nb_iface = 0;
 433         int rc = 0;
 434
 435         *iface_list = NULL;
 436         *iface_count = 0;
 437
 438         /*
 439          * Fist pass: count and sanity check
 440          */
 441
 442         bytes_left = buf_len;
 443         p = buf;
 444         while (bytes_left >= sizeof(*p)) {
 445                 nb_iface++;
 446                 next = le32_to_cpu(p->Next);
 447                 if (!next) {
 448                         bytes_left -= sizeof(*p);
 449                         break;
 450                 }
 451                 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
 452                 bytes_left -= next;
 453         }
 454
 455         if (!nb_iface) {
 456                 cifs_dbg(VFS, "%s: malformed interface info\n", __func__);
 457                 rc = -EINVAL;
 458                 goto out;
 459         }
 460
 461         if (bytes_left || p->Next)
 462                 cifs_dbg(VFS, "%s: incomplete interface info\n", __func__);
 463
 464
 465         /*
 466          * Second pass: extract info to internal structure
 467          */
 468
 469         *iface_list = kcalloc(nb_iface, sizeof(**iface_list), GFP_KERNEL);
 470         if (!*iface_list) {
 471                 rc = -ENOMEM;
 472                 goto out;
 473         }
 474
 475         info = *iface_list;
 476         bytes_left = buf_len;
 477         p = buf;
 478         while (bytes_left >= sizeof(*p)) {
 479                 info->speed = le64_to_cpu(p->LinkSpeed);
 480                 info->rdma_capable = le32_to_cpu(p->Capability & RDMA_CAPABLE);
 481                 info->rss_capable = le32_to_cpu(p->Capability & RSS_CAPABLE);
 482
 483                 cifs_dbg(FYI, "%s: adding iface %zu\n", __func__, *iface_count);
 484                 cifs_dbg(FYI, "%s: speed %zu bps\n", __func__, info->speed);
 485                 cifs_dbg(FYI, "%s: capabilities 0x%08x\n", __func__,
 486                          le32_to_cpu(p->Capability));
 487
 488                 switch (p->Family) {
 489                 /*
 490                  * The kernel and wire socket structures have the same
 491                  * layout and use network byte order but make the
 492                  * conversion explicit in case either one changes.
 493                  */
 494                 case INTERNETWORK:
 495                         addr4 = (struct sockaddr_in *)&info->sockaddr;
 496                         p4 = (struct iface_info_ipv4 *)p->Buffer;
 497                         addr4->sin_family = AF_INET;
 498                         memcpy(&addr4->sin_addr, &p4->IPv4Address, 4);
 499
 500                         /* [MS-SMB2] 2.2.32.5.1.1 Clients MUST ignore these */
 501                         addr4->sin_port = cpu_to_be16(CIFS_PORT);
 502
 503                         cifs_dbg(FYI, "%s: ipv4 %pI4\n", __func__,
 504                                  &addr4->sin_addr);
 505                         break;
 506                 case INTERNETWORKV6:
 507                         addr6 = (struct sockaddr_in6 *)&info->sockaddr;
 508                         p6 = (struct iface_info_ipv6 *)p->Buffer;
 509                         addr6->sin6_family = AF_INET6;
 510                         memcpy(&addr6->sin6_addr, &p6->IPv6Address, 16);
 511
 512                         /* [MS-SMB2] 2.2.32.5.1.2 Clients MUST ignore these */
 513                         addr6->sin6_flowinfo = 0;
 514                         addr6->sin6_scope_id = 0;
 515                         addr6->sin6_port = cpu_to_be16(CIFS_PORT);
 516
 517                         cifs_dbg(FYI, "%s: ipv6 %pI6\n", __func__,
 518                                  &addr6->sin6_addr);
 519                         break;
 520                 default:
 521                         cifs_dbg(VFS,
 522                                  "%s: skipping unsupported socket family\n",
 523                                  __func__);
 524                         goto next_iface;
 525                 }
 526
 527                 (*iface_count)++;
 528                 info++;
 529 next_iface:
 530                 next = le32_to_cpu(p->Next);
 531                 if (!next)
 532                         break;
 533                 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
 534                 bytes_left -= next;
 535         }
 536
 537         if (!*iface_count) {
 538                 rc = -EINVAL;
 539                 goto out;
 540         }
 541
 542 out:
 543         if (rc) {
 544                 kfree(*iface_list);
 545                 *iface_count = 0;
 546                 *iface_list = NULL;
 547         }
 548         return rc;
 549 }
 550
 551 static int compare_iface(const void *ia, const void *ib)
 552 {
 553         const struct cifs_server_iface *a = (struct cifs_server_iface *)ia;
 554         const struct cifs_server_iface *b = (struct cifs_server_iface *)ib;
 555
 556         return a->speed == b->speed ? 0 : (a->speed > b->speed ? -1 : 1);
 557 }
 558
 559 static int
 560 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon)
 561 {
 562         int rc;
 563         unsigned int ret_data_len = 0;
 564         struct network_interface_info_ioctl_rsp *out_buf = NULL;
 565         struct cifs_server_iface *iface_list;
 566         size_t iface_count;
 567         struct cifs_ses *ses = tcon->ses;
 568
 569         rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
 570                         FSCTL_QUERY_NETWORK_INTERFACE_INFO, true /* is_fsctl */,
 571                         NULL /* no data input */, 0 /* no data input */,
 572                         CIFSMaxBufSize, (char **)&out_buf, &ret_data_len);
 573         if (rc == -EOPNOTSUPP) {
 574                 cifs_dbg(FYI,
 575                          "server does not support query network interfaces\n");
 576                 goto out;
 577         } else if (rc != 0) {
 578                 cifs_tcon_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
 579                 goto out;
 580         }
 581
 582         rc = parse_server_interfaces(out_buf, ret_data_len,
 583                                      &iface_list, &iface_count);
 584         if (rc)
 585                 goto out;
 586
 587         /* sort interfaces from fastest to slowest */
 588         sort(iface_list, iface_count, sizeof(*iface_list), compare_iface, NULL);
 589
 590         spin_lock(&ses->iface_lock);
 591         kfree(ses->iface_list);
 592         ses->iface_list = iface_list;
 593         ses->iface_count = iface_count;
 594         ses->iface_last_update = jiffies;
 595         spin_unlock(&ses->iface_lock);
 596
 597 out:
 598         kfree(out_buf);
 599         return rc;
 600 }
 601
 602 static void
 603 smb2_close_cached_fid(struct kref *ref)
 604 {
 605         struct cached_fid *cfid = container_of(ref, struct cached_fid,
 606                                                refcount);
 607
 608         if (cfid->is_valid) {
 609                 cifs_dbg(FYI, "clear cached root file handle\n");
 610                 SMB2_close(0, cfid->tcon, cfid->fid->persistent_fid,
 611                            cfid->fid->volatile_fid);
 612                 cfid->is_valid = false;
 613                 cfid->file_all_info_is_valid = false;
 614                 cfid->has_lease = false;
 615         }
 616 }
 617
 618 void close_shroot(struct cached_fid *cfid)
 619 {
 620         mutex_lock(&cfid->fid_mutex);
 621         kref_put(&cfid->refcount, smb2_close_cached_fid);
 622         mutex_unlock(&cfid->fid_mutex);
 623 }
 624
 625 void close_shroot_lease_locked(struct cached_fid *cfid)
 626 {
 627         if (cfid->has_lease) {
 628                 cfid->has_lease = false;
 629                 kref_put(&cfid->refcount, smb2_close_cached_fid);
 630         }
 631 }
 632
 633 void close_shroot_lease(struct cached_fid *cfid)
 634 {
 635         mutex_lock(&cfid->fid_mutex);
 636         close_shroot_lease_locked(cfid);
 637         mutex_unlock(&cfid->fid_mutex);
 638 }
 639
 640 void
 641 smb2_cached_lease_break(struct work_struct *work)
 642 {
 643         struct cached_fid *cfid = container_of(work,
 644                                 struct cached_fid, lease_break);
 645
 646         close_shroot_lease(cfid);
 647 }
 648
 649 /*
 650  * Open the directory at the root of a share
 651  */
 652 int open_shroot(unsigned int xid, struct cifs_tcon *tcon,
 653                 struct cifs_sb_info *cifs_sb, struct cifs_fid *pfid)
 654 {
 655         struct cifs_ses *ses = tcon->ses;
 656         struct TCP_Server_Info *server = ses->server;
 657         struct cifs_open_parms oparms;
 658         struct smb2_create_rsp *o_rsp = NULL;
 659         struct smb2_query_info_rsp *qi_rsp = NULL;
 660         int resp_buftype[2];
 661         struct smb_rqst rqst[2];
 662         struct kvec rsp_iov[2];
 663         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
 664         struct kvec qi_iov[1];
 665         int rc, flags = 0;
 666         __le16 utf16_path = 0; /* Null - since an open of top of share */
 667         u8 oplock = SMB2_OPLOCK_LEVEL_II;
 668
 669         mutex_lock(&tcon->crfid.fid_mutex);
 670         if (tcon->crfid.is_valid) {
 671                 cifs_dbg(FYI, "found a cached root file handle\n");
 672                 memcpy(pfid, tcon->crfid.fid, sizeof(struct cifs_fid));
 673                 kref_get(&tcon->crfid.refcount);
 674                 mutex_unlock(&tcon->crfid.fid_mutex);
 675                 return 0;
 676         }
 677
 678         /*
 679          * We do not hold the lock for the open because in case
 680          * SMB2_open needs to reconnect, it will end up calling
 681          * cifs_mark_open_files_invalid() which takes the lock again
 682          * thus causing a deadlock
 683          */
 684
 685         mutex_unlock(&tcon->crfid.fid_mutex);
 686
 687         if (smb3_encryption_required(tcon))
 688                 flags |= CIFS_TRANSFORM_REQ;
 689
 690         if (!server->ops->new_lease_key)
 691                 return -EIO;
 692
 693         server->ops->new_lease_key(pfid);
 694
 695         memset(rqst, 0, sizeof(rqst));
 696         resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER;
 697         memset(rsp_iov, 0, sizeof(rsp_iov));
 698
 699         /* Open */
 700         memset(&open_iov, 0, sizeof(open_iov));
 701         rqst[0].rq_iov = open_iov;
 702         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
 703
 704         oparms.tcon = tcon;
 705         oparms.create_options = cifs_create_options(cifs_sb, 0);
 706         oparms.desired_access = FILE_READ_ATTRIBUTES;
 707         oparms.disposition = FILE_OPEN;
 708         oparms.fid = pfid;
 709         oparms.reconnect = false;
 710
 711         rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, &utf16_path);
 712         if (rc)
 713                 goto oshr_free;
 714         smb2_set_next_command(tcon, &rqst[0]);
 715
 716         memset(&qi_iov, 0, sizeof(qi_iov));
 717         rqst[1].rq_iov = qi_iov;
 718         rqst[1].rq_nvec = 1;
 719
 720         rc = SMB2_query_info_init(tcon, &rqst[1], COMPOUND_FID,
 721                                   COMPOUND_FID, FILE_ALL_INFORMATION,
 722                                   SMB2_O_INFO_FILE, 0,
 723                                   sizeof(struct smb2_file_all_info) +
 724                                   PATH_MAX * 2, 0, NULL);
 725         if (rc)
 726                 goto oshr_free;
 727
 728         smb2_set_related(&rqst[1]);
 729
 730         rc = compound_send_recv(xid, ses, flags, 2, rqst,
 731                                 resp_buftype, rsp_iov);
 732         mutex_lock(&tcon->crfid.fid_mutex);
 733
 734         /*
 735          * Now we need to check again as the cached root might have
 736          * been successfully re-opened from a concurrent process
 737          */
 738
 739         if (tcon->crfid.is_valid) {
 740                 /* work was already done */
 741
 742                 /* stash fids for close() later */
 743                 struct cifs_fid fid = {
 744                         .persistent_fid = pfid->persistent_fid,
 745                         .volatile_fid = pfid->volatile_fid,
 746                 };
 747
 748                 /*
 749                  * caller expects this func to set pfid to a valid
 750                  * cached root, so we copy the existing one and get a
 751                  * reference.
 752                  */
 753                 memcpy(pfid, tcon->crfid.fid, sizeof(*pfid));
 754                 kref_get(&tcon->crfid.refcount);
 755
 756                 mutex_unlock(&tcon->crfid.fid_mutex);
 757
 758                 if (rc == 0) {
 759                         /* close extra handle outside of crit sec */
 760                         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 761                 }
 762                 goto oshr_free;
 763         }
 764
 765         /* Cached root is still invalid, continue normaly */
 766
 767         if (rc) {
 768                 if (rc == -EREMCHG) {
 769                         tcon->need_reconnect = true;
 770                         printk_once(KERN_WARNING "server share %s deleted\n",
 771                                     tcon->treeName);
 772                 }
 773                 goto oshr_exit;
 774         }
 775
 776         atomic_inc(&tcon->num_remote_opens);
 777
 778         o_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base;
 779         oparms.fid->persistent_fid = o_rsp->PersistentFileId;
 780         oparms.fid->volatile_fid = o_rsp->VolatileFileId;
 781 #ifdef CONFIG_CIFS_DEBUG2
 782         oparms.fid->mid = le64_to_cpu(o_rsp->sync_hdr.MessageId);
 783 #endif /* CIFS_DEBUG2 */
 784
 785         memcpy(tcon->crfid.fid, pfid, sizeof(struct cifs_fid));
 786         tcon->crfid.tcon = tcon;
 787         tcon->crfid.is_valid = true;
 788         kref_init(&tcon->crfid.refcount);
 789
 790         /* BB TBD check to see if oplock level check can be removed below */
 791         if (o_rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE) {
 792                 kref_get(&tcon->crfid.refcount);
 793                 tcon->crfid.has_lease = true;
 794                 smb2_parse_contexts(server, o_rsp,
 795                                 &oparms.fid->epoch,
 796                                     oparms.fid->lease_key, &oplock,
 797                                     NULL, NULL);
 798         } else
 799                 goto oshr_exit;
 800
 801         qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
 802         if (le32_to_cpu(qi_rsp->OutputBufferLength) < sizeof(struct smb2_file_all_info))
 803                 goto oshr_exit;
 804         if (!smb2_validate_and_copy_iov(
 805                                 le16_to_cpu(qi_rsp->OutputBufferOffset),
 806                                 sizeof(struct smb2_file_all_info),
 807                                 &rsp_iov[1], sizeof(struct smb2_file_all_info),
 808                                 (char *)&tcon->crfid.file_all_info))
 809                 tcon->crfid.file_all_info_is_valid = true;
 810
 811 oshr_exit:
 812         mutex_unlock(&tcon->crfid.fid_mutex);
 813 oshr_free:
 814         SMB2_open_free(&rqst[0]);
 815         SMB2_query_info_free(&rqst[1]);
 816         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
 817         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
 818         return rc;
 819 }
 820
 821 static void
 822 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
 823               struct cifs_sb_info *cifs_sb)
 824 {
 825         int rc;
 826         __le16 srch_path = 0; /* Null - open root of share */
 827         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 828         struct cifs_open_parms oparms;
 829         struct cifs_fid fid;
 830         bool no_cached_open = tcon->nohandlecache;
 831
 832         oparms.tcon = tcon;
 833         oparms.desired_access = FILE_READ_ATTRIBUTES;
 834         oparms.disposition = FILE_OPEN;
 835         oparms.create_options = cifs_create_options(cifs_sb, 0);
 836         oparms.fid = &fid;
 837         oparms.reconnect = false;
 838
 839         if (no_cached_open)
 840                 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
 841                                NULL, NULL);
 842         else
 843                 rc = open_shroot(xid, tcon, cifs_sb, &fid);
 844
 845         if (rc)
 846                 return;
 847
 848         SMB3_request_interfaces(xid, tcon);
 849
 850         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 851                         FS_ATTRIBUTE_INFORMATION);
 852         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 853                         FS_DEVICE_INFORMATION);
 854         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 855                         FS_VOLUME_INFORMATION);
 856         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 857                         FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
 858         if (no_cached_open)
 859                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 860         else
 861                 close_shroot(&tcon->crfid);
 862 }
 863
 864 static void
 865 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
 866               struct cifs_sb_info *cifs_sb)
 867 {
 868         int rc;
 869         __le16 srch_path = 0; /* Null - open root of share */
 870         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 871         struct cifs_open_parms oparms;
 872         struct cifs_fid fid;
 873
 874         oparms.tcon = tcon;
 875         oparms.desired_access = FILE_READ_ATTRIBUTES;
 876         oparms.disposition = FILE_OPEN;
 877         oparms.create_options = cifs_create_options(cifs_sb, 0);
 878         oparms.fid = &fid;
 879         oparms.reconnect = false;
 880
 881         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
 882                        NULL, NULL);
 883         if (rc)
 884                 return;
 885
 886         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 887                         FS_ATTRIBUTE_INFORMATION);
 888         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 889                         FS_DEVICE_INFORMATION);
 890         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 891 }
 892
 893 static int
 894 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
 895                         struct cifs_sb_info *cifs_sb, const char *full_path)
 896 {
 897         int rc;
 898         __le16 *utf16_path;
 899         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 900         struct cifs_open_parms oparms;
 901         struct cifs_fid fid;
 902
 903         if ((*full_path == 0) && tcon->crfid.is_valid)
 904                 return 0;
 905
 906         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
 907         if (!utf16_path)
 908                 return -ENOMEM;
 909
 910         oparms.tcon = tcon;
 911         oparms.desired_access = FILE_READ_ATTRIBUTES;
 912         oparms.disposition = FILE_OPEN;
 913         oparms.create_options = cifs_create_options(cifs_sb, 0);
 914         oparms.fid = &fid;
 915         oparms.reconnect = false;
 916
 917         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
 918                        NULL);
 919         if (rc) {
 920                 kfree(utf16_path);
 921                 return rc;
 922         }
 923
 924         rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 925         kfree(utf16_path);
 926         return rc;
 927 }
 928
 929 static int
 930 smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
 931                   struct cifs_sb_info *cifs_sb, const char *full_path,
 932                   u64 *uniqueid, FILE_ALL_INFO *data)
 933 {
 934         *uniqueid = le64_to_cpu(data->IndexNumber);
 935         return 0;
 936 }
 937
 938 static int
 939 smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
 940                      struct cifs_fid *fid, FILE_ALL_INFO *data)
 941 {
 942         int rc;
 943         struct smb2_file_all_info *smb2_data;
 944
 945         smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
 946                             GFP_KERNEL);
 947         if (smb2_data == NULL)
 948                 return -ENOMEM;
 949
 950         rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid,
 951                              smb2_data);
 952         if (!rc)
 953                 move_smb2_info_to_cifs(data, smb2_data);
 954         kfree(smb2_data);
 955         return rc;
 956 }
 957
 958 #ifdef CONFIG_CIFS_XATTR
 959 static ssize_t
 960 move_smb2_ea_to_cifs(char *dst, size_t dst_size,
 961                      struct smb2_file_full_ea_info *src, size_t src_size,
 962                      const unsigned char *ea_name)
 963 {
 964         int rc = 0;
 965         unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0;
 966         char *name, *value;
 967         size_t buf_size = dst_size;
 968         size_t name_len, value_len, user_name_len;
 969
 970         while (src_size > 0) {
 971                 name = &src->ea_data[0];
 972                 name_len = (size_t)src->ea_name_length;
 973                 value = &src->ea_data[src->ea_name_length + 1];
 974                 value_len = (size_t)le16_to_cpu(src->ea_value_length);
 975
 976                 if (name_len == 0)
 977                         break;
 978
 979                 if (src_size < 8 + name_len + 1 + value_len) {
 980                         cifs_dbg(FYI, "EA entry goes beyond length of list\n");
 981                         rc = -EIO;
 982                         goto out;
 983                 }
 984
 985                 if (ea_name) {
 986                         if (ea_name_len == name_len &&
 987                             memcmp(ea_name, name, name_len) == 0) {
 988                                 rc = value_len;
 989                                 if (dst_size == 0)
 990                                         goto out;
 991                                 if (dst_size < value_len) {
 992                                         rc = -ERANGE;
 993                                         goto out;
 994                                 }
 995                                 memcpy(dst, value, value_len);
 996                                 goto out;
 997                         }
 998                 } else {
 999                         /* 'user.' plus a terminating null */
1000                         user_name_len = 5 + 1 + name_len;
1001
1002                         if (buf_size == 0) {
1003                                 /* skip copy - calc size only */
1004                                 rc += user_name_len;
1005                         } else if (dst_size >= user_name_len) {
1006                                 dst_size -= user_name_len;
1007                                 memcpy(dst, "user.", 5);
1008                                 dst += 5;
1009                                 memcpy(dst, src->ea_data, name_len);
1010                                 dst += name_len;
1011                                 *dst = 0;
1012                                 ++dst;
1013                                 rc += user_name_len;
1014                         } else {
1015                                 /* stop before overrun buffer */
1016                                 rc = -ERANGE;
1017                                 break;
1018                         }
1019                 }
1020
1021                 if (!src->next_entry_offset)
1022                         break;
1023
1024                 if (src_size < le32_to_cpu(src->next_entry_offset)) {
1025                         /* stop before overrun buffer */
1026                         rc = -ERANGE;
1027                         break;
1028                 }
1029                 src_size -= le32_to_cpu(src->next_entry_offset);
1030                 src = (void *)((char *)src +
1031                                le32_to_cpu(src->next_entry_offset));
1032         }
1033
1034         /* didn't find the named attribute */
1035         if (ea_name)
1036                 rc = -ENODATA;
1037
1038 out:
1039         return (ssize_t)rc;
1040 }
1041
1042 static ssize_t
1043 smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
1044                const unsigned char *path, const unsigned char *ea_name,
1045                char *ea_data, size_t buf_size,
1046                struct cifs_sb_info *cifs_sb)
1047 {
1048         int rc;
1049         __le16 *utf16_path;
1050         struct kvec rsp_iov = {NULL, 0};
1051         int buftype = CIFS_NO_BUFFER;
1052         struct smb2_query_info_rsp *rsp;
1053         struct smb2_file_full_ea_info *info = NULL;
1054
1055         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1056         if (!utf16_path)
1057                 return -ENOMEM;
1058
1059         rc = smb2_query_info_compound(xid, tcon, utf16_path,
1060                                       FILE_READ_EA,
1061                                       FILE_FULL_EA_INFORMATION,
1062                                       SMB2_O_INFO_FILE,
1063                                       CIFSMaxBufSize -
1064                                       MAX_SMB2_CREATE_RESPONSE_SIZE -
1065                                       MAX_SMB2_CLOSE_RESPONSE_SIZE,
1066                                       &rsp_iov, &buftype, cifs_sb);
1067         if (rc) {
1068                 /*
1069                  * If ea_name is NULL (listxattr) and there are no EAs,
1070                  * return 0 as it's not an error. Otherwise, the specified
1071                  * ea_name was not found.
1072                  */
1073                 if (!ea_name && rc == -ENODATA)
1074                         rc = 0;
1075                 goto qeas_exit;
1076         }
1077
1078         rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
1079         rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
1080                                le32_to_cpu(rsp->OutputBufferLength),
1081                                &rsp_iov,
1082                                sizeof(struct smb2_file_full_ea_info));
1083         if (rc)
1084                 goto qeas_exit;
1085
1086         info = (struct smb2_file_full_ea_info *)(
1087                         le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
1088         rc = move_smb2_ea_to_cifs(ea_data, buf_size, info,
1089                         le32_to_cpu(rsp->OutputBufferLength), ea_name);
1090
1091  qeas_exit:
1092         kfree(utf16_path);
1093         free_rsp_buf(buftype, rsp_iov.iov_base);
1094         return rc;
1095 }
1096
1097
1098 static int
1099 smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
1100             const char *path, const char *ea_name, const void *ea_value,
1101             const __u16 ea_value_len, const struct nls_table *nls_codepage,
1102             struct cifs_sb_info *cifs_sb)
1103 {
1104         struct cifs_ses *ses = tcon->ses;
1105         __le16 *utf16_path = NULL;
1106         int ea_name_len = strlen(ea_name);
1107         int flags = 0;
1108         int len;
1109         struct smb_rqst rqst[3];
1110         int resp_buftype[3];
1111         struct kvec rsp_iov[3];
1112         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
1113         struct cifs_open_parms oparms;
1114         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1115         struct cifs_fid fid;
1116         struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE];
1117         unsigned int size[1];
1118         void *data[1];
1119         struct smb2_file_full_ea_info *ea = NULL;
1120         struct kvec close_iov[1];
1121         struct smb2_query_info_rsp *rsp;
1122         int rc, used_len = 0;
1123
1124         if (smb3_encryption_required(tcon))
1125                 flags |= CIFS_TRANSFORM_REQ;
1126
1127         if (ea_name_len > 255)
1128                 return -EINVAL;
1129
1130         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1131         if (!utf16_path)
1132                 return -ENOMEM;
1133
1134         memset(rqst, 0, sizeof(rqst));
1135         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1136         memset(rsp_iov, 0, sizeof(rsp_iov));
1137
1138         if (ses->server->ops->query_all_EAs) {
1139                 if (!ea_value) {
1140                         rc = ses->server->ops->query_all_EAs(xid, tcon, path,
1141                                                              ea_name, NULL, 0,
1142                                                              cifs_sb);
1143                         if (rc == -ENODATA)
1144                                 goto sea_exit;
1145                 } else {
1146                         /* If we are adding a attribute we should first check
1147                          * if there will be enough space available to store
1148                          * the new EA. If not we should not add it since we
1149                          * would not be able to even read the EAs back.
1150                          */
1151                         rc = smb2_query_info_compound(xid, tcon, utf16_path,
1152                                       FILE_READ_EA,
1153                                       FILE_FULL_EA_INFORMATION,
1154                                       SMB2_O_INFO_FILE,
1155                                       CIFSMaxBufSize -
1156                                       MAX_SMB2_CREATE_RESPONSE_SIZE -
1157                                       MAX_SMB2_CLOSE_RESPONSE_SIZE,
1158                                       &rsp_iov[1], &resp_buftype[1], cifs_sb);
1159                         if (rc == 0) {
1160                                 rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1161                                 used_len = le32_to_cpu(rsp->OutputBufferLength);
1162                         }
1163                         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1164                         resp_buftype[1] = CIFS_NO_BUFFER;
1165                         memset(&rsp_iov[1], 0, sizeof(rsp_iov[1]));
1166                         rc = 0;
1167
1168                         /* Use a fudge factor of 256 bytes in case we collide
1169                          * with a different set_EAs command.
1170                          */
1171                         if(CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE -
1172                            MAX_SMB2_CLOSE_RESPONSE_SIZE - 256 <
1173                            used_len + ea_name_len + ea_value_len + 1) {
1174                                 rc = -ENOSPC;
1175                                 goto sea_exit;
1176                         }
1177                 }
1178         }
1179
1180         /* Open */
1181         memset(&open_iov, 0, sizeof(open_iov));
1182         rqst[0].rq_iov = open_iov;
1183         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1184
1185         memset(&oparms, 0, sizeof(oparms));
1186         oparms.tcon = tcon;
1187         oparms.desired_access = FILE_WRITE_EA;
1188         oparms.disposition = FILE_OPEN;
1189         oparms.create_options = cifs_create_options(cifs_sb, 0);
1190         oparms.fid = &fid;
1191         oparms.reconnect = false;
1192
1193         rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, utf16_path);
1194         if (rc)
1195                 goto sea_exit;
1196         smb2_set_next_command(tcon, &rqst[0]);
1197
1198
1199         /* Set Info */
1200         memset(&si_iov, 0, sizeof(si_iov));
1201         rqst[1].rq_iov = si_iov;
1202         rqst[1].rq_nvec = 1;
1203
1204         len = sizeof(ea) + ea_name_len + ea_value_len + 1;
1205         ea = kzalloc(len, GFP_KERNEL);
1206         if (ea == NULL) {
1207                 rc = -ENOMEM;
1208                 goto sea_exit;
1209         }
1210
1211         ea->ea_name_length = ea_name_len;
1212         ea->ea_value_length = cpu_to_le16(ea_value_len);
1213         memcpy(ea->ea_data, ea_name, ea_name_len + 1);
1214         memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len);
1215
1216         size[0] = len;
1217         data[0] = ea;
1218
1219         rc = SMB2_set_info_init(tcon, &rqst[1], COMPOUND_FID,
1220                                 COMPOUND_FID, current->tgid,
1221                                 FILE_FULL_EA_INFORMATION,
1222                                 SMB2_O_INFO_FILE, 0, data, size);
1223         smb2_set_next_command(tcon, &rqst[1]);
1224         smb2_set_related(&rqst[1]);
1225
1226
1227         /* Close */
1228         memset(&close_iov, 0, sizeof(close_iov));
1229         rqst[2].rq_iov = close_iov;
1230         rqst[2].rq_nvec = 1;
1231         rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
1232         smb2_set_related(&rqst[2]);
1233
1234         rc = compound_send_recv(xid, ses, flags, 3, rqst,
1235                                 resp_buftype, rsp_iov);
1236         /* no need to bump num_remote_opens because handle immediately closed */
1237
1238  sea_exit:
1239         kfree(ea);
1240         kfree(utf16_path);
1241         SMB2_open_free(&rqst[0]);
1242         SMB2_set_info_free(&rqst[1]);
1243         SMB2_close_free(&rqst[2]);
1244         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1245         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1246         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1247         return rc;
1248 }
1249 #endif
1250
1251 static bool
1252 smb2_can_echo(struct TCP_Server_Info *server)
1253 {
1254         return server->echoes;
1255 }
1256
1257 static void
1258 smb2_clear_stats(struct cifs_tcon *tcon)
1259 {
1260         int i;
1261
1262         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
1263                 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
1264                 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
1265         }
1266 }
1267
1268 static void
1269 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
1270 {
1271         seq_puts(m, "\n\tShare Capabilities:");
1272         if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
1273                 seq_puts(m, " DFS,");
1274         if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
1275                 seq_puts(m, " CONTINUOUS AVAILABILITY,");
1276         if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
1277                 seq_puts(m, " SCALEOUT,");
1278         if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
1279                 seq_puts(m, " CLUSTER,");
1280         if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
1281                 seq_puts(m, " ASYMMETRIC,");
1282         if (tcon->capabilities == 0)
1283                 seq_puts(m, " None");
1284         if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
1285                 seq_puts(m, " Aligned,");
1286         if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
1287                 seq_puts(m, " Partition Aligned,");
1288         if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
1289                 seq_puts(m, " SSD,");
1290         if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
1291                 seq_puts(m, " TRIM-support,");
1292
1293         seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
1294         seq_printf(m, "\n\ttid: 0x%x", tcon->tid);
1295         if (tcon->perf_sector_size)
1296                 seq_printf(m, "\tOptimal sector size: 0x%x",
1297                            tcon->perf_sector_size);
1298         seq_printf(m, "\tMaximal Access: 0x%x", tcon->maximal_access);
1299 }
1300
1301 static void
1302 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
1303 {
1304         atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
1305         atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
1306
1307         /*
1308          *  Can't display SMB2_NEGOTIATE, SESSION_SETUP, LOGOFF, CANCEL and ECHO
1309          *  totals (requests sent) since those SMBs are per-session not per tcon
1310          */
1311         seq_printf(m, "\nBytes read: %llu  Bytes written: %llu",
1312                    (long long)(tcon->bytes_read),
1313                    (long long)(tcon->bytes_written));
1314         seq_printf(m, "\nOpen files: %d total (local), %d open on server",
1315                    atomic_read(&tcon->num_local_opens),
1316                    atomic_read(&tcon->num_remote_opens));
1317         seq_printf(m, "\nTreeConnects: %d total %d failed",
1318                    atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
1319                    atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
1320         seq_printf(m, "\nTreeDisconnects: %d total %d failed",
1321                    atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
1322                    atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
1323         seq_printf(m, "\nCreates: %d total %d failed",
1324                    atomic_read(&sent[SMB2_CREATE_HE]),
1325                    atomic_read(&failed[SMB2_CREATE_HE]));
1326         seq_printf(m, "\nCloses: %d total %d failed",
1327                    atomic_read(&sent[SMB2_CLOSE_HE]),
1328                    atomic_read(&failed[SMB2_CLOSE_HE]));
1329         seq_printf(m, "\nFlushes: %d total %d failed",
1330                    atomic_read(&sent[SMB2_FLUSH_HE]),
1331                    atomic_read(&failed[SMB2_FLUSH_HE]));
1332         seq_printf(m, "\nReads: %d total %d failed",
1333                    atomic_read(&sent[SMB2_READ_HE]),
1334                    atomic_read(&failed[SMB2_READ_HE]));
1335         seq_printf(m, "\nWrites: %d total %d failed",
1336                    atomic_read(&sent[SMB2_WRITE_HE]),
1337                    atomic_read(&failed[SMB2_WRITE_HE]));
1338         seq_printf(m, "\nLocks: %d total %d failed",
1339                    atomic_read(&sent[SMB2_LOCK_HE]),
1340                    atomic_read(&failed[SMB2_LOCK_HE]));
1341         seq_printf(m, "\nIOCTLs: %d total %d failed",
1342                    atomic_read(&sent[SMB2_IOCTL_HE]),
1343                    atomic_read(&failed[SMB2_IOCTL_HE]));
1344         seq_printf(m, "\nQueryDirectories: %d total %d failed",
1345                    atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
1346                    atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
1347         seq_printf(m, "\nChangeNotifies: %d total %d failed",
1348                    atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
1349                    atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
1350         seq_printf(m, "\nQueryInfos: %d total %d failed",
1351                    atomic_read(&sent[SMB2_QUERY_INFO_HE]),
1352                    atomic_read(&failed[SMB2_QUERY_INFO_HE]));
1353         seq_printf(m, "\nSetInfos: %d total %d failed",
1354                    atomic_read(&sent[SMB2_SET_INFO_HE]),
1355                    atomic_read(&failed[SMB2_SET_INFO_HE]));
1356         seq_printf(m, "\nOplockBreaks: %d sent %d failed",
1357                    atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
1358                    atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
1359 }
1360
1361 static void
1362 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
1363 {
1364         struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
1365         struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
1366
1367         cfile->fid.persistent_fid = fid->persistent_fid;
1368         cfile->fid.volatile_fid = fid->volatile_fid;
1369         cfile->fid.access = fid->access;
1370 #ifdef CONFIG_CIFS_DEBUG2
1371         cfile->fid.mid = fid->mid;
1372 #endif /* CIFS_DEBUG2 */
1373         server->ops->set_oplock_level(cinode, oplock, fid->epoch,
1374                                       &fid->purge_cache);
1375         cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
1376         memcpy(cfile->fid.create_guid, fid->create_guid, 16);
1377 }
1378
1379 static void
1380 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
1381                 struct cifs_fid *fid)
1382 {
1383         SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1384 }
1385
1386 static void
1387 smb2_close_getattr(const unsigned int xid, struct cifs_tcon *tcon,
1388                    struct cifsFileInfo *cfile)
1389 {
1390         struct smb2_file_network_open_info file_inf;
1391         struct inode *inode;
1392         int rc;
1393
1394         rc = __SMB2_close(xid, tcon, cfile->fid.persistent_fid,
1395                    cfile->fid.volatile_fid, &file_inf);
1396         if (rc)
1397                 return;
1398
1399         inode = d_inode(cfile->dentry);
1400
1401         spin_lock(&inode->i_lock);
1402         CIFS_I(inode)->time = jiffies;
1403
1404         /* Creation time should not need to be updated on close */
1405         if (file_inf.LastWriteTime)
1406                 inode->i_mtime = cifs_NTtimeToUnix(file_inf.LastWriteTime);
1407         if (file_inf.ChangeTime)
1408                 inode->i_ctime = cifs_NTtimeToUnix(file_inf.ChangeTime);
1409         if (file_inf.LastAccessTime)
1410                 inode->i_atime = cifs_NTtimeToUnix(file_inf.LastAccessTime);
1411
1412         /*
1413          * i_blocks is not related to (i_size / i_blksize),
1414          * but instead 512 byte (2**9) size is required for
1415          * calculating num blocks.
1416          */
1417         if (le64_to_cpu(file_inf.AllocationSize) > 4096)
1418                 inode->i_blocks =
1419                         (512 - 1 + le64_to_cpu(file_inf.AllocationSize)) >> 9;
1420
1421         /* End of file and Attributes should not have to be updated on close */
1422         spin_unlock(&inode->i_lock);
1423 }
1424
1425 static int
1426 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
1427                      u64 persistent_fid, u64 volatile_fid,
1428                      struct copychunk_ioctl *pcchunk)
1429 {
1430         int rc;
1431         unsigned int ret_data_len;
1432         struct resume_key_req *res_key;
1433
1434         rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
1435                         FSCTL_SRV_REQUEST_RESUME_KEY, true /* is_fsctl */,
1436                         NULL, 0 /* no input */, CIFSMaxBufSize,
1437                         (char **)&res_key, &ret_data_len);
1438
1439         if (rc) {
1440                 cifs_tcon_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
1441                 goto req_res_key_exit;
1442         }
1443         if (ret_data_len < sizeof(struct resume_key_req)) {
1444                 cifs_tcon_dbg(VFS, "Invalid refcopy resume key length\n");
1445                 rc = -EINVAL;
1446                 goto req_res_key_exit;
1447         }
1448         memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
1449
1450 req_res_key_exit:
1451         kfree(res_key);
1452         return rc;
1453 }
1454
1455 static int
1456 smb2_ioctl_query_info(const unsigned int xid,
1457                       struct cifs_tcon *tcon,
1458                       struct cifs_sb_info *cifs_sb,
1459                       __le16 *path, int is_dir,
1460                       unsigned long p)
1461 {
1462         struct cifs_ses *ses = tcon->ses;
1463         char __user *arg = (char __user *)p;
1464         struct smb_query_info qi;
1465         struct smb_query_info __user *pqi;
1466         int rc = 0;
1467         int flags = 0;
1468         struct smb2_query_info_rsp *qi_rsp = NULL;
1469         struct smb2_ioctl_rsp *io_rsp = NULL;
1470         void *buffer = NULL;
1471         struct smb_rqst rqst[3];
1472         int resp_buftype[3];
1473         struct kvec rsp_iov[3];
1474         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
1475         struct cifs_open_parms oparms;
1476         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1477         struct cifs_fid fid;
1478         struct kvec qi_iov[1];
1479         struct kvec io_iov[SMB2_IOCTL_IOV_SIZE];
1480         struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE];
1481         struct kvec close_iov[1];
1482         unsigned int size[2];
1483         void *data[2];
1484         int create_options = is_dir ? CREATE_NOT_FILE : CREATE_NOT_DIR;
1485
1486         memset(rqst, 0, sizeof(rqst));
1487         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1488         memset(rsp_iov, 0, sizeof(rsp_iov));
1489
1490         if (copy_from_user(&qi, arg, sizeof(struct smb_query_info)))
1491                 return -EFAULT;
1492
1493         if (qi.output_buffer_length > 1024)
1494                 return -EINVAL;
1495
1496         if (!ses || !(ses->server))
1497                 return -EIO;
1498
1499         if (smb3_encryption_required(tcon))
1500                 flags |= CIFS_TRANSFORM_REQ;
1501
1502         buffer = memdup_user(arg + sizeof(struct smb_query_info),
1503                              qi.output_buffer_length);
1504         if (IS_ERR(buffer))
1505                 return PTR_ERR(buffer);
1506
1507         /* Open */
1508         memset(&open_iov, 0, sizeof(open_iov));
1509         rqst[0].rq_iov = open_iov;
1510         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1511
1512         memset(&oparms, 0, sizeof(oparms));
1513         oparms.tcon = tcon;
1514         oparms.disposition = FILE_OPEN;
1515         oparms.create_options = cifs_create_options(cifs_sb, create_options);
1516         oparms.fid = &fid;
1517         oparms.reconnect = false;
1518
1519         if (qi.flags & PASSTHRU_FSCTL) {
1520                 switch (qi.info_type & FSCTL_DEVICE_ACCESS_MASK) {
1521                 case FSCTL_DEVICE_ACCESS_FILE_READ_WRITE_ACCESS:
1522                         oparms.desired_access = FILE_READ_DATA | FILE_WRITE_DATA | FILE_READ_ATTRIBUTES | SYNCHRONIZE;
1523                         break;
1524                 case FSCTL_DEVICE_ACCESS_FILE_ANY_ACCESS:
1525                         oparms.desired_access = GENERIC_ALL;
1526                         break;
1527                 case FSCTL_DEVICE_ACCESS_FILE_READ_ACCESS:
1528                         oparms.desired_access = GENERIC_READ;
1529                         break;
1530                 case FSCTL_DEVICE_ACCESS_FILE_WRITE_ACCESS:
1531                         oparms.desired_access = GENERIC_WRITE;
1532                         break;
1533                 }
1534         } else if (qi.flags & PASSTHRU_SET_INFO) {
1535                 oparms.desired_access = GENERIC_WRITE;
1536         } else {
1537                 oparms.desired_access = FILE_READ_ATTRIBUTES | READ_CONTROL;
1538         }
1539
1540         rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, path);
1541         if (rc)
1542                 goto iqinf_exit;
1543         smb2_set_next_command(tcon, &rqst[0]);
1544
1545         /* Query */
1546         if (qi.flags & PASSTHRU_FSCTL) {
1547                 /* Can eventually relax perm check since server enforces too */
1548                 if (!capable(CAP_SYS_ADMIN))
1549                         rc = -EPERM;
1550                 else  {
1551                         memset(&io_iov, 0, sizeof(io_iov));
1552                         rqst[1].rq_iov = io_iov;
1553                         rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
1554
1555                         rc = SMB2_ioctl_init(tcon, &rqst[1],
1556                                              COMPOUND_FID, COMPOUND_FID,
1557                                              qi.info_type, true, buffer,
1558                                              qi.output_buffer_length,
1559                                              CIFSMaxBufSize -
1560                                              MAX_SMB2_CREATE_RESPONSE_SIZE -
1561                                              MAX_SMB2_CLOSE_RESPONSE_SIZE);
1562                 }
1563         } else if (qi.flags == PASSTHRU_SET_INFO) {
1564                 /* Can eventually relax perm check since server enforces too */
1565                 if (!capable(CAP_SYS_ADMIN))
1566                         rc = -EPERM;
1567                 else  {
1568                         memset(&si_iov, 0, sizeof(si_iov));
1569                         rqst[1].rq_iov = si_iov;
1570                         rqst[1].rq_nvec = 1;
1571
1572                         size[0] = 8;
1573                         data[0] = buffer;
1574
1575                         rc = SMB2_set_info_init(tcon, &rqst[1],
1576                                         COMPOUND_FID, COMPOUND_FID,
1577                                         current->tgid,
1578                                         FILE_END_OF_FILE_INFORMATION,
1579                                         SMB2_O_INFO_FILE, 0, data, size);
1580                 }
1581         } else if (qi.flags == PASSTHRU_QUERY_INFO) {
1582                 memset(&qi_iov, 0, sizeof(qi_iov));
1583                 rqst[1].rq_iov = qi_iov;
1584                 rqst[1].rq_nvec = 1;
1585
1586                 rc = SMB2_query_info_init(tcon, &rqst[1], COMPOUND_FID,
1587                                   COMPOUND_FID, qi.file_info_class,
1588                                   qi.info_type, qi.additional_information,
1589                                   qi.input_buffer_length,
1590                                   qi.output_buffer_length, buffer);
1591         } else { /* unknown flags */
1592                 cifs_tcon_dbg(VFS, "invalid passthru query flags: 0x%x\n", qi.flags);
1593                 rc = -EINVAL;
1594         }
1595
1596         if (rc)
1597                 goto iqinf_exit;
1598         smb2_set_next_command(tcon, &rqst[1]);
1599         smb2_set_related(&rqst[1]);
1600
1601         /* Close */
1602         memset(&close_iov, 0, sizeof(close_iov));
1603         rqst[2].rq_iov = close_iov;
1604         rqst[2].rq_nvec = 1;
1605
1606         rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
1607         if (rc)
1608                 goto iqinf_exit;
1609         smb2_set_related(&rqst[2]);
1610
1611         rc = compound_send_recv(xid, ses, flags, 3, rqst,
1612                                 resp_buftype, rsp_iov);
1613         if (rc)
1614                 goto iqinf_exit;
1615
1616         /* No need to bump num_remote_opens since handle immediately closed */
1617         if (qi.flags & PASSTHRU_FSCTL) {
1618                 pqi = (struct smb_query_info __user *)arg;
1619                 io_rsp = (struct smb2_ioctl_rsp *)rsp_iov[1].iov_base;
1620                 if (le32_to_cpu(io_rsp->OutputCount) < qi.input_buffer_length)
1621                         qi.input_buffer_length = le32_to_cpu(io_rsp->OutputCount);
1622                 if (qi.input_buffer_length > 0 &&
1623                     le32_to_cpu(io_rsp->OutputOffset) + qi.input_buffer_length
1624                     > rsp_iov[1].iov_len)
1625                         goto e_fault;
1626
1627                 if (copy_to_user(&pqi->input_buffer_length,
1628                                  &qi.input_buffer_length,
1629                                  sizeof(qi.input_buffer_length)))
1630                         goto e_fault;
1631
1632                 if (copy_to_user((void __user *)pqi + sizeof(struct smb_query_info),
1633                                  (const void *)io_rsp + le32_to_cpu(io_rsp->OutputOffset),
1634                                  qi.input_buffer_length))
1635                         goto e_fault;
1636         } else {
1637                 pqi = (struct smb_query_info __user *)arg;
1638                 qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1639                 if (le32_to_cpu(qi_rsp->OutputBufferLength) < qi.input_buffer_length)
1640                         qi.input_buffer_length = le32_to_cpu(qi_rsp->OutputBufferLength);
1641                 if (copy_to_user(&pqi->input_buffer_length,
1642                                  &qi.input_buffer_length,
1643                                  sizeof(qi.input_buffer_length)))
1644                         goto e_fault;
1645
1646                 if (copy_to_user(pqi + 1, qi_rsp->Buffer,
1647                                  qi.input_buffer_length))
1648                         goto e_fault;
1649         }
1650
1651  iqinf_exit:
1652         kfree(buffer);
1653         SMB2_open_free(&rqst[0]);
1654         if (qi.flags & PASSTHRU_FSCTL)
1655                 SMB2_ioctl_free(&rqst[1]);
1656         else
1657                 SMB2_query_info_free(&rqst[1]);
1658
1659         SMB2_close_free(&rqst[2]);
1660         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1661         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1662         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1663         return rc;
1664
1665 e_fault:
1666         rc = -EFAULT;
1667         goto iqinf_exit;
1668 }
1669
1670 static ssize_t
1671 smb2_copychunk_range(const unsigned int xid,
1672                         struct cifsFileInfo *srcfile,
1673                         struct cifsFileInfo *trgtfile, u64 src_off,
1674                         u64 len, u64 dest_off)
1675 {
1676         int rc;
1677         unsigned int ret_data_len;
1678         struct copychunk_ioctl *pcchunk;
1679         struct copychunk_ioctl_rsp *retbuf = NULL;
1680         struct cifs_tcon *tcon;
1681         int chunks_copied = 0;
1682         bool chunk_sizes_updated = false;
1683         ssize_t bytes_written, total_bytes_written = 0;
1684
1685         pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
1686
1687         if (pcchunk == NULL)
1688                 return -ENOMEM;
1689
1690         cifs_dbg(FYI, "%s: about to call request res key\n", __func__);
1691         /* Request a key from the server to identify the source of the copy */
1692         rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
1693                                 srcfile->fid.persistent_fid,
1694                                 srcfile->fid.volatile_fid, pcchunk);
1695
1696         /* Note: request_res_key sets res_key null only if rc !=0 */
1697         if (rc)
1698                 goto cchunk_out;
1699
1700         /* For now array only one chunk long, will make more flexible later */
1701         pcchunk->ChunkCount = cpu_to_le32(1);
1702         pcchunk->Reserved = 0;
1703         pcchunk->Reserved2 = 0;
1704
1705         tcon = tlink_tcon(trgtfile->tlink);
1706
1707         while (len > 0) {
1708                 pcchunk->SourceOffset = cpu_to_le64(src_off);
1709                 pcchunk->TargetOffset = cpu_to_le64(dest_off);
1710                 pcchunk->Length =
1711                         cpu_to_le32(min_t(u32, len, tcon->max_bytes_chunk));
1712
1713                 /* Request server copy to target from src identified by key */
1714                 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1715                         trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
1716                         true /* is_fsctl */, (char *)pcchunk,
1717                         sizeof(struct copychunk_ioctl), CIFSMaxBufSize,
1718                         (char **)&retbuf, &ret_data_len);
1719                 if (rc == 0) {
1720                         if (ret_data_len !=
1721                                         sizeof(struct copychunk_ioctl_rsp)) {
1722                                 cifs_tcon_dbg(VFS, "invalid cchunk response size\n");
1723                                 rc = -EIO;
1724                                 goto cchunk_out;
1725                         }
1726                         if (retbuf->TotalBytesWritten == 0) {
1727                                 cifs_dbg(FYI, "no bytes copied\n");
1728                                 rc = -EIO;
1729                                 goto cchunk_out;
1730                         }
1731                         /*
1732                          * Check if server claimed to write more than we asked
1733                          */
1734                         if (le32_to_cpu(retbuf->TotalBytesWritten) >
1735                             le32_to_cpu(pcchunk->Length)) {
1736                                 cifs_tcon_dbg(VFS, "invalid copy chunk response\n");
1737                                 rc = -EIO;
1738                                 goto cchunk_out;
1739                         }
1740                         if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
1741                                 cifs_tcon_dbg(VFS, "invalid num chunks written\n");
1742                                 rc = -EIO;
1743                                 goto cchunk_out;
1744                         }
1745                         chunks_copied++;
1746
1747                         bytes_written = le32_to_cpu(retbuf->TotalBytesWritten);
1748                         src_off += bytes_written;
1749                         dest_off += bytes_written;
1750                         len -= bytes_written;
1751                         total_bytes_written += bytes_written;
1752
1753                         cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n",
1754                                 le32_to_cpu(retbuf->ChunksWritten),
1755                                 le32_to_cpu(retbuf->ChunkBytesWritten),
1756                                 bytes_written);
1757                 } else if (rc == -EINVAL) {
1758                         if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
1759                                 goto cchunk_out;
1760
1761                         cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
1762                                 le32_to_cpu(retbuf->ChunksWritten),
1763                                 le32_to_cpu(retbuf->ChunkBytesWritten),
1764                                 le32_to_cpu(retbuf->TotalBytesWritten));
1765
1766                         /*
1767                          * Check if this is the first request using these sizes,
1768                          * (ie check if copy succeed once with original sizes
1769                          * and check if the server gave us different sizes after
1770                          * we already updated max sizes on previous request).
1771                          * if not then why is the server returning an error now
1772                          */
1773                         if ((chunks_copied != 0) || chunk_sizes_updated)
1774                                 goto cchunk_out;
1775
1776                         /* Check that server is not asking us to grow size */
1777                         if (le32_to_cpu(retbuf->ChunkBytesWritten) <
1778                                         tcon->max_bytes_chunk)
1779                                 tcon->max_bytes_chunk =
1780                                         le32_to_cpu(retbuf->ChunkBytesWritten);
1781                         else
1782                                 goto cchunk_out; /* server gave us bogus size */
1783
1784                         /* No need to change MaxChunks since already set to 1 */
1785                         chunk_sizes_updated = true;
1786                 } else
1787                         goto cchunk_out;
1788         }
1789
1790 cchunk_out:
1791         kfree(pcchunk);
1792         kfree(retbuf);
1793         if (rc)
1794                 return rc;
1795         else
1796                 return total_bytes_written;
1797 }
1798
1799 static int
1800 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
1801                 struct cifs_fid *fid)
1802 {
1803         return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1804 }
1805
1806 static unsigned int
1807 smb2_read_data_offset(char *buf)
1808 {
1809         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1810
1811         return rsp->DataOffset;
1812 }
1813
1814 static unsigned int
1815 smb2_read_data_length(char *buf, bool in_remaining)
1816 {
1817         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1818
1819         if (in_remaining)
1820                 return le32_to_cpu(rsp->DataRemaining);
1821
1822         return le32_to_cpu(rsp->DataLength);
1823 }
1824
1825
1826 static int
1827 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
1828                struct cifs_io_parms *parms, unsigned int *bytes_read,
1829                char **buf, int *buf_type)
1830 {
1831         parms->persistent_fid = pfid->persistent_fid;
1832         parms->volatile_fid = pfid->volatile_fid;
1833         return SMB2_read(xid, parms, bytes_read, buf, buf_type);
1834 }
1835
1836 static int
1837 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
1838                 struct cifs_io_parms *parms, unsigned int *written,
1839                 struct kvec *iov, unsigned long nr_segs)
1840 {
1841
1842         parms->persistent_fid = pfid->persistent_fid;
1843         parms->volatile_fid = pfid->volatile_fid;
1844         return SMB2_write(xid, parms, written, iov, nr_segs);
1845 }
1846
1847 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
1848 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
1849                 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
1850 {
1851         struct cifsInodeInfo *cifsi;
1852         int rc;
1853
1854         cifsi = CIFS_I(inode);
1855
1856         /* if file already sparse don't bother setting sparse again */
1857         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
1858                 return true; /* already sparse */
1859
1860         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
1861                 return true; /* already not sparse */
1862
1863         /*
1864          * Can't check for sparse support on share the usual way via the
1865          * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
1866          * since Samba server doesn't set the flag on the share, yet
1867          * supports the set sparse FSCTL and returns sparse correctly
1868          * in the file attributes. If we fail setting sparse though we
1869          * mark that server does not support sparse files for this share
1870          * to avoid repeatedly sending the unsupported fsctl to server
1871          * if the file is repeatedly extended.
1872          */
1873         if (tcon->broken_sparse_sup)
1874                 return false;
1875
1876         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1877                         cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
1878                         true /* is_fctl */,
1879                         &setsparse, 1, CIFSMaxBufSize, NULL, NULL);
1880         if (rc) {
1881                 tcon->broken_sparse_sup = true;
1882                 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
1883                 return false;
1884         }
1885
1886         if (setsparse)
1887                 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
1888         else
1889                 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
1890
1891         return true;
1892 }
1893
1894 static int
1895 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
1896                    struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
1897 {
1898         __le64 eof = cpu_to_le64(size);
1899         struct inode *inode;
1900
1901         /*
1902          * If extending file more than one page make sparse. Many Linux fs
1903          * make files sparse by default when extending via ftruncate
1904          */
1905         inode = d_inode(cfile->dentry);
1906
1907         if (!set_alloc && (size > inode->i_size + 8192)) {
1908                 __u8 set_sparse = 1;
1909
1910                 /* whether set sparse succeeds or not, extend the file */
1911                 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
1912         }
1913
1914         return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
1915                             cfile->fid.volatile_fid, cfile->pid, &eof);
1916 }
1917
1918 static int
1919 smb2_duplicate_extents(const unsigned int xid,
1920                         struct cifsFileInfo *srcfile,
1921                         struct cifsFileInfo *trgtfile, u64 src_off,
1922                         u64 len, u64 dest_off)
1923 {
1924         int rc;
1925         unsigned int ret_data_len;
1926         struct duplicate_extents_to_file dup_ext_buf;
1927         struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
1928
1929         /* server fileays advertise duplicate extent support with this flag */
1930         if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
1931              FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
1932                 return -EOPNOTSUPP;
1933
1934         dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
1935         dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
1936         dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
1937         dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
1938         dup_ext_buf.ByteCount = cpu_to_le64(len);
1939         cifs_dbg(FYI, "Duplicate extents: src off %lld dst off %lld len %lld\n",
1940                 src_off, dest_off, len);
1941
1942         rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
1943         if (rc)
1944                 goto duplicate_extents_out;
1945
1946         rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1947                         trgtfile->fid.volatile_fid,
1948                         FSCTL_DUPLICATE_EXTENTS_TO_FILE,
1949                         true /* is_fsctl */,
1950                         (char *)&dup_ext_buf,
1951                         sizeof(struct duplicate_extents_to_file),
1952                         CIFSMaxBufSize, NULL,
1953                         &ret_data_len);
1954
1955         if (ret_data_len > 0)
1956                 cifs_dbg(FYI, "Non-zero response length in duplicate extents\n");
1957
1958 duplicate_extents_out:
1959         return rc;
1960 }
1961
1962 static int
1963 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
1964                    struct cifsFileInfo *cfile)
1965 {
1966         return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
1967                             cfile->fid.volatile_fid);
1968 }
1969
1970 static int
1971 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
1972                    struct cifsFileInfo *cfile)
1973 {
1974         struct fsctl_set_integrity_information_req integr_info;
1975         unsigned int ret_data_len;
1976
1977         integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
1978         integr_info.Flags = 0;
1979         integr_info.Reserved = 0;
1980
1981         return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1982                         cfile->fid.volatile_fid,
1983                         FSCTL_SET_INTEGRITY_INFORMATION,
1984                         true /* is_fsctl */,
1985                         (char *)&integr_info,
1986                         sizeof(struct fsctl_set_integrity_information_req),
1987                         CIFSMaxBufSize, NULL,
1988                         &ret_data_len);
1989
1990 }
1991
1992 /* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */
1993 #define GMT_TOKEN_SIZE 50
1994
1995 #define MIN_SNAPSHOT_ARRAY_SIZE 16 /* See MS-SMB2 section 3.3.5.15.1 */
1996
1997 /*
1998  * Input buffer contains (empty) struct smb_snapshot array with size filled in
1999  * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2
2000  */
2001 static int
2002 smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
2003                    struct cifsFileInfo *cfile, void __user *ioc_buf)
2004 {
2005         char *retbuf = NULL;
2006         unsigned int ret_data_len = 0;
2007         int rc;
2008         u32 max_response_size;
2009         struct smb_snapshot_array snapshot_in;
2010
2011         /*
2012          * On the first query to enumerate the list of snapshots available
2013          * for this volume the buffer begins with 0 (number of snapshots
2014          * which can be returned is zero since at that point we do not know
2015          * how big the buffer needs to be). On the second query,
2016          * it (ret_data_len) is set to number of snapshots so we can
2017          * know to set the maximum response size larger (see below).
2018          */
2019         if (get_user(ret_data_len, (unsigned int __user *)ioc_buf))
2020                 return -EFAULT;
2021
2022         /*
2023          * Note that for snapshot queries that servers like Azure expect that
2024          * the first query be minimal size (and just used to get the number/size
2025          * of previous versions) so response size must be specified as EXACTLY
2026          * sizeof(struct snapshot_array) which is 16 when rounded up to multiple
2027          * of eight bytes.
2028          */
2029         if (ret_data_len == 0)
2030                 max_response_size = MIN_SNAPSHOT_ARRAY_SIZE;
2031         else
2032                 max_response_size = CIFSMaxBufSize;
2033
2034         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2035                         cfile->fid.volatile_fid,
2036                         FSCTL_SRV_ENUMERATE_SNAPSHOTS,
2037                         true /* is_fsctl */,
2038                         NULL, 0 /* no input data */, max_response_size,
2039                         (char **)&retbuf,
2040                         &ret_data_len);
2041         cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n",
2042                         rc, ret_data_len);
2043         if (rc)
2044                 return rc;
2045
2046         if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) {
2047                 /* Fixup buffer */
2048                 if (copy_from_user(&snapshot_in, ioc_buf,
2049                     sizeof(struct smb_snapshot_array))) {
2050                         rc = -EFAULT;
2051                         kfree(retbuf);
2052                         return rc;
2053                 }
2054
2055                 /*
2056                  * Check for min size, ie not large enough to fit even one GMT
2057                  * token (snapshot).  On the first ioctl some users may pass in
2058                  * smaller size (or zero) to simply get the size of the array
2059                  * so the user space caller can allocate sufficient memory
2060                  * and retry the ioctl again with larger array size sufficient
2061                  * to hold all of the snapshot GMT tokens on the second try.
2062                  */
2063                 if (snapshot_in.snapshot_array_size < GMT_TOKEN_SIZE)
2064                         ret_data_len = sizeof(struct smb_snapshot_array);
2065
2066                 /*
2067                  * We return struct SRV_SNAPSHOT_ARRAY, followed by
2068                  * the snapshot array (of 50 byte GMT tokens) each
2069                  * representing an available previous version of the data
2070                  */
2071                 if (ret_data_len > (snapshot_in.snapshot_array_size +
2072                                         sizeof(struct smb_snapshot_array)))
2073                         ret_data_len = snapshot_in.snapshot_array_size +
2074                                         sizeof(struct smb_snapshot_array);
2075
2076                 if (copy_to_user(ioc_buf, retbuf, ret_data_len))
2077                         rc = -EFAULT;
2078         }
2079
2080         kfree(retbuf);
2081         return rc;
2082 }
2083
2084
2085
2086 static int
2087 smb3_notify(const unsigned int xid, struct file *pfile,
2088             void __user *ioc_buf)
2089 {
2090         struct smb3_notify notify;
2091         struct dentry *dentry = pfile->f_path.dentry;
2092         struct inode *inode = file_inode(pfile);
2093         struct cifs_sb_info *cifs_sb;
2094         struct cifs_open_parms oparms;
2095         struct cifs_fid fid;
2096         struct cifs_tcon *tcon;
2097         unsigned char *path = NULL;
2098         __le16 *utf16_path = NULL;
2099         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2100         int rc = 0;
2101
2102         path = build_path_from_dentry(dentry);
2103         if (path == NULL)
2104                 return -ENOMEM;
2105
2106         cifs_sb = CIFS_SB(inode->i_sb);
2107
2108         utf16_path = cifs_convert_path_to_utf16(path + 1, cifs_sb);
2109         if (utf16_path == NULL) {
2110                 rc = -ENOMEM;
2111                 goto notify_exit;
2112         }
2113
2114         if (copy_from_user(&notify, ioc_buf, sizeof(struct smb3_notify))) {
2115                 rc = -EFAULT;
2116                 goto notify_exit;
2117         }
2118
2119         tcon = cifs_sb_master_tcon(cifs_sb);
2120         oparms.tcon = tcon;
2121         oparms.desired_access = FILE_READ_ATTRIBUTES;
2122         oparms.disposition = FILE_OPEN;
2123         oparms.create_options = cifs_create_options(cifs_sb, 0);
2124         oparms.fid = &fid;
2125         oparms.reconnect = false;
2126
2127         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
2128                        NULL);
2129         if (rc)
2130                 goto notify_exit;
2131
2132         rc = SMB2_change_notify(xid, tcon, fid.persistent_fid, fid.volatile_fid,
2133                                 notify.watch_tree, notify.completion_filter);
2134
2135         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2136
2137         cifs_dbg(FYI, "change notify for path %s rc %d\n", path, rc);
2138
2139 notify_exit:
2140         kfree(path);
2141         kfree(utf16_path);
2142         return rc;
2143 }
2144
2145 static int
2146 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
2147                      const char *path, struct cifs_sb_info *cifs_sb,
2148                      struct cifs_fid *fid, __u16 search_flags,
2149                      struct cifs_search_info *srch_inf)
2150 {
2151         __le16 *utf16_path;
2152         struct smb_rqst rqst[2];
2153         struct kvec rsp_iov[2];
2154         int resp_buftype[2];
2155         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2156         struct kvec qd_iov[SMB2_QUERY_DIRECTORY_IOV_SIZE];
2157         int rc, flags = 0;
2158         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2159         struct cifs_open_parms oparms;
2160         struct smb2_query_directory_rsp *qd_rsp = NULL;
2161         struct smb2_create_rsp *op_rsp = NULL;
2162
2163         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2164         if (!utf16_path)
2165                 return -ENOMEM;
2166
2167         if (smb3_encryption_required(tcon))
2168                 flags |= CIFS_TRANSFORM_REQ;
2169
2170         memset(rqst, 0, sizeof(rqst));
2171         resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER;
2172         memset(rsp_iov, 0, sizeof(rsp_iov));
2173
2174         /* Open */
2175         memset(&open_iov, 0, sizeof(open_iov));
2176         rqst[0].rq_iov = open_iov;
2177         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2178
2179         oparms.tcon = tcon;
2180         oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
2181         oparms.disposition = FILE_OPEN;
2182         oparms.create_options = cifs_create_options(cifs_sb, 0);
2183         oparms.fid = fid;
2184         oparms.reconnect = false;
2185
2186         rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, utf16_path);
2187         if (rc)
2188                 goto qdf_free;
2189         smb2_set_next_command(tcon, &rqst[0]);
2190
2191         /* Query directory */
2192         srch_inf->entries_in_buffer = 0;
2193         srch_inf->index_of_last_entry = 2;
2194
2195         memset(&qd_iov, 0, sizeof(qd_iov));
2196         rqst[1].rq_iov = qd_iov;
2197         rqst[1].rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE;
2198
2199         rc = SMB2_query_directory_init(xid, tcon, &rqst[1],
2200                                        COMPOUND_FID, COMPOUND_FID,
2201                                        0, srch_inf->info_level);
2202         if (rc)
2203                 goto qdf_free;
2204
2205         smb2_set_related(&rqst[1]);
2206
2207         rc = compound_send_recv(xid, tcon->ses, flags, 2, rqst,
2208                                 resp_buftype, rsp_iov);
2209
2210         /* If the open failed there is nothing to do */
2211         op_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base;
2212         if (op_rsp == NULL || op_rsp->sync_hdr.Status != STATUS_SUCCESS) {
2213                 cifs_dbg(FYI, "query_dir_first: open failed rc=%d\n", rc);
2214                 goto qdf_free;
2215         }
2216         fid->persistent_fid = op_rsp->PersistentFileId;
2217         fid->volatile_fid = op_rsp->VolatileFileId;
2218
2219         /* Anything else than ENODATA means a genuine error */
2220         if (rc && rc != -ENODATA) {
2221                 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2222                 cifs_dbg(FYI, "query_dir_first: query directory failed rc=%d\n", rc);
2223                 trace_smb3_query_dir_err(xid, fid->persistent_fid,
2224                                          tcon->tid, tcon->ses->Suid, 0, 0, rc);
2225                 goto qdf_free;
2226         }
2227
2228         atomic_inc(&tcon->num_remote_opens);
2229
2230         qd_rsp = (struct smb2_query_directory_rsp *)rsp_iov[1].iov_base;
2231         if (qd_rsp->sync_hdr.Status == STATUS_NO_MORE_FILES) {
2232                 trace_smb3_query_dir_done(xid, fid->persistent_fid,
2233                                           tcon->tid, tcon->ses->Suid, 0, 0);
2234                 srch_inf->endOfSearch = true;
2235                 rc = 0;
2236                 goto qdf_free;
2237         }
2238
2239         rc = smb2_parse_query_directory(tcon, &rsp_iov[1], resp_buftype[1],
2240                                         srch_inf);
2241         if (rc) {
2242                 trace_smb3_query_dir_err(xid, fid->persistent_fid, tcon->tid,
2243                         tcon->ses->Suid, 0, 0, rc);
2244                 goto qdf_free;
2245         }
2246         resp_buftype[1] = CIFS_NO_BUFFER;
2247
2248         trace_smb3_query_dir_done(xid, fid->persistent_fid, tcon->tid,
2249                         tcon->ses->Suid, 0, srch_inf->entries_in_buffer);
2250
2251  qdf_free:
2252         kfree(utf16_path);
2253         SMB2_open_free(&rqst[0]);
2254         SMB2_query_directory_free(&rqst[1]);
2255         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2256         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2257         return rc;
2258 }
2259
2260 static int
2261 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
2262                     struct cifs_fid *fid, __u16 search_flags,
2263                     struct cifs_search_info *srch_inf)
2264 {
2265         return SMB2_query_directory(xid, tcon, fid->persistent_fid,
2266                                     fid->volatile_fid, 0, srch_inf);
2267 }
2268
2269 static int
2270 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
2271                struct cifs_fid *fid)
2272 {
2273         return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2274 }
2275
2276 /*
2277  * If we negotiate SMB2 protocol and get STATUS_PENDING - update
2278  * the number of credits and return true. Otherwise - return false.
2279  */
2280 static bool
2281 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server)
2282 {
2283         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
2284
2285         if (shdr->Status != STATUS_PENDING)
2286                 return false;
2287
2288         if (shdr->CreditRequest) {
2289                 spin_lock(&server->req_lock);
2290                 server->credits += le16_to_cpu(shdr->CreditRequest);
2291                 spin_unlock(&server->req_lock);
2292                 wake_up(&server->request_q);
2293         }
2294
2295         return true;
2296 }
2297
2298 static bool
2299 smb2_is_session_expired(char *buf)
2300 {
2301         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
2302
2303         if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED &&
2304             shdr->Status != STATUS_USER_SESSION_DELETED)
2305                 return false;
2306
2307         trace_smb3_ses_expired(shdr->TreeId, shdr->SessionId,
2308                                le16_to_cpu(shdr->Command),
2309                                le64_to_cpu(shdr->MessageId));
2310         cifs_dbg(FYI, "Session expired or deleted\n");
2311
2312         return true;
2313 }
2314
2315 static int
2316 smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
2317                      struct cifsInodeInfo *cinode)
2318 {
2319         if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
2320                 return SMB2_lease_break(0, tcon, cinode->lease_key,
2321                                         smb2_get_lease_state(cinode));
2322
2323         return SMB2_oplock_break(0, tcon, fid->persistent_fid,
2324                                  fid->volatile_fid,
2325                                  CIFS_CACHE_READ(cinode) ? 1 : 0);
2326 }
2327
2328 void
2329 smb2_set_related(struct smb_rqst *rqst)
2330 {
2331         struct smb2_sync_hdr *shdr;
2332
2333         shdr = (struct smb2_sync_hdr *)(rqst->rq_iov[0].iov_base);
2334         if (shdr == NULL) {
2335                 cifs_dbg(FYI, "shdr NULL in smb2_set_related\n");
2336                 return;
2337         }
2338         shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
2339 }
2340
2341 char smb2_padding[7] = {0, 0, 0, 0, 0, 0, 0};
2342
2343 void
2344 smb2_set_next_command(struct cifs_tcon *tcon, struct smb_rqst *rqst)
2345 {
2346         struct smb2_sync_hdr *shdr;
2347         struct cifs_ses *ses = tcon->ses;
2348         struct TCP_Server_Info *server = ses->server;
2349         unsigned long len = smb_rqst_len(server, rqst);
2350         int i, num_padding;
2351
2352         shdr = (struct smb2_sync_hdr *)(rqst->rq_iov[0].iov_base);
2353         if (shdr == NULL) {
2354                 cifs_dbg(FYI, "shdr NULL in smb2_set_next_command\n");
2355                 return;
2356         }
2357
2358         /* SMB headers in a compound are 8 byte aligned. */
2359
2360         /* No padding needed */
2361         if (!(len & 7))
2362                 goto finished;
2363
2364         num_padding = 8 - (len & 7);
2365         if (!smb3_encryption_required(tcon)) {
2366                 /*
2367                  * If we do not have encryption then we can just add an extra
2368                  * iov for the padding.
2369                  */
2370                 rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding;
2371                 rqst->rq_iov[rqst->rq_nvec].iov_len = num_padding;
2372                 rqst->rq_nvec++;
2373                 len += num_padding;
2374         } else {
2375                 /*
2376                  * We can not add a small padding iov for the encryption case
2377                  * because the encryption framework can not handle the padding
2378                  * iovs.
2379                  * We have to flatten this into a single buffer and add
2380                  * the padding to it.
2381                  */
2382                 for (i = 1; i < rqst->rq_nvec; i++) {
2383                         memcpy(rqst->rq_iov[0].iov_base +
2384                                rqst->rq_iov[0].iov_len,
2385                                rqst->rq_iov[i].iov_base,
2386                                rqst->rq_iov[i].iov_len);
2387                         rqst->rq_iov[0].iov_len += rqst->rq_iov[i].iov_len;
2388                 }
2389                 memset(rqst->rq_iov[0].iov_base + rqst->rq_iov[0].iov_len,
2390                        0, num_padding);
2391                 rqst->rq_iov[0].iov_len += num_padding;
2392                 len += num_padding;
2393                 rqst->rq_nvec = 1;
2394         }
2395
2396  finished:
2397         shdr->NextCommand = cpu_to_le32(len);
2398 }
2399
2400 /*
2401  * Passes the query info response back to the caller on success.
2402  * Caller need to free this with free_rsp_buf().
2403  */
2404 int
2405 smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon,
2406                          __le16 *utf16_path, u32 desired_access,
2407                          u32 class, u32 type, u32 output_len,
2408                          struct kvec *rsp, int *buftype,
2409                          struct cifs_sb_info *cifs_sb)
2410 {
2411         struct cifs_ses *ses = tcon->ses;
2412         int flags = 0;
2413         struct smb_rqst rqst[3];
2414         int resp_buftype[3];
2415         struct kvec rsp_iov[3];
2416         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2417         struct kvec qi_iov[1];
2418         struct kvec close_iov[1];
2419         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2420         struct cifs_open_parms oparms;
2421         struct cifs_fid fid;
2422         int rc;
2423
2424         if (smb3_encryption_required(tcon))
2425                 flags |= CIFS_TRANSFORM_REQ;
2426
2427         memset(rqst, 0, sizeof(rqst));
2428         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
2429         memset(rsp_iov, 0, sizeof(rsp_iov));
2430
2431         memset(&open_iov, 0, sizeof(open_iov));
2432         rqst[0].rq_iov = open_iov;
2433         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2434
2435         oparms.tcon = tcon;
2436         oparms.desired_access = desired_access;
2437         oparms.disposition = FILE_OPEN;
2438         oparms.create_options = cifs_create_options(cifs_sb, 0);
2439         oparms.fid = &fid;
2440         oparms.reconnect = false;
2441
2442         rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, utf16_path);
2443         if (rc)
2444                 goto qic_exit;
2445         smb2_set_next_command(tcon, &rqst[0]);
2446
2447         memset(&qi_iov, 0, sizeof(qi_iov));
2448         rqst[1].rq_iov = qi_iov;
2449         rqst[1].rq_nvec = 1;
2450
2451         rc = SMB2_query_info_init(tcon, &rqst[1], COMPOUND_FID, COMPOUND_FID,
2452                                   class, type, 0,
2453                                   output_len, 0,
2454                                   NULL);
2455         if (rc)
2456                 goto qic_exit;
2457         smb2_set_next_command(tcon, &rqst[1]);
2458         smb2_set_related(&rqst[1]);
2459
2460         memset(&close_iov, 0, sizeof(close_iov));
2461         rqst[2].rq_iov = close_iov;
2462         rqst[2].rq_nvec = 1;
2463
2464         rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
2465         if (rc)
2466                 goto qic_exit;
2467         smb2_set_related(&rqst[2]);
2468
2469         rc = compound_send_recv(xid, ses, flags, 3, rqst,
2470                                 resp_buftype, rsp_iov);
2471         if (rc) {
2472                 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2473                 if (rc == -EREMCHG) {
2474                         tcon->need_reconnect = true;
2475                         printk_once(KERN_WARNING "server share %s deleted\n",
2476                                     tcon->treeName);
2477                 }
2478                 goto qic_exit;
2479         }
2480         *rsp = rsp_iov[1];
2481         *buftype = resp_buftype[1];
2482
2483  qic_exit:
2484         SMB2_open_free(&rqst[0]);
2485         SMB2_query_info_free(&rqst[1]);
2486         SMB2_close_free(&rqst[2]);
2487         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2488         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
2489         return rc;
2490 }
2491
2492 static int
2493 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2494              struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
2495 {
2496         struct smb2_query_info_rsp *rsp;
2497         struct smb2_fs_full_size_info *info = NULL;
2498         __le16 utf16_path = 0; /* Null - open root of share */
2499         struct kvec rsp_iov = {NULL, 0};
2500         int buftype = CIFS_NO_BUFFER;
2501         int rc;
2502
2503
2504         rc = smb2_query_info_compound(xid, tcon, &utf16_path,
2505                                       FILE_READ_ATTRIBUTES,
2506                                       FS_FULL_SIZE_INFORMATION,
2507                                       SMB2_O_INFO_FILESYSTEM,
2508                                       sizeof(struct smb2_fs_full_size_info),
2509                                       &rsp_iov, &buftype, cifs_sb);
2510         if (rc)
2511                 goto qfs_exit;
2512
2513         rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
2514         buf->f_type = SMB2_MAGIC_NUMBER;
2515         info = (struct smb2_fs_full_size_info *)(
2516                 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
2517         rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
2518                                le32_to_cpu(rsp->OutputBufferLength),
2519                                &rsp_iov,
2520                                sizeof(struct smb2_fs_full_size_info));
2521         if (!rc)
2522                 smb2_copy_fs_info_to_kstatfs(info, buf);
2523
2524 qfs_exit:
2525         free_rsp_buf(buftype, rsp_iov.iov_base);
2526         return rc;
2527 }
2528
2529 static int
2530 smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2531                struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
2532 {
2533         int rc;
2534         __le16 srch_path = 0; /* Null - open root of share */
2535         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2536         struct cifs_open_parms oparms;
2537         struct cifs_fid fid;
2538
2539         if (!tcon->posix_extensions)
2540                 return smb2_queryfs(xid, tcon, cifs_sb, buf);
2541
2542         oparms.tcon = tcon;
2543         oparms.desired_access = FILE_READ_ATTRIBUTES;
2544         oparms.disposition = FILE_OPEN;
2545         oparms.create_options = cifs_create_options(cifs_sb, 0);
2546         oparms.fid = &fid;
2547         oparms.reconnect = false;
2548
2549         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
2550                        NULL, NULL);
2551         if (rc)
2552                 return rc;
2553
2554         rc = SMB311_posix_qfs_info(xid, tcon, fid.persistent_fid,
2555                                    fid.volatile_fid, buf);
2556         buf->f_type = SMB2_MAGIC_NUMBER;
2557         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2558         return rc;
2559 }
2560
2561 static bool
2562 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
2563 {
2564         return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
2565                ob1->fid.volatile_fid == ob2->fid.volatile_fid;
2566 }
2567
2568 static int
2569 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
2570                __u64 length, __u32 type, int lock, int unlock, bool wait)
2571 {
2572         if (unlock && !lock)
2573                 type = SMB2_LOCKFLAG_UNLOCK;
2574         return SMB2_lock(xid, tlink_tcon(cfile->tlink),
2575                          cfile->fid.persistent_fid, cfile->fid.volatile_fid,
2576                          current->tgid, length, offset, type, wait);
2577 }
2578
2579 static void
2580 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
2581 {
2582         memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
2583 }
2584
2585 static void
2586 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
2587 {
2588         memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
2589 }
2590
2591 static void
2592 smb2_new_lease_key(struct cifs_fid *fid)
2593 {
2594         generate_random_uuid(fid->lease_key);
2595 }
2596
2597 static int
2598 smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
2599                    const char *search_name,
2600                    struct dfs_info3_param **target_nodes,
2601                    unsigned int *num_of_nodes,
2602                    const struct nls_table *nls_codepage, int remap)
2603 {
2604         int rc;
2605         __le16 *utf16_path = NULL;
2606         int utf16_path_len = 0;
2607         struct cifs_tcon *tcon;
2608         struct fsctl_get_dfs_referral_req *dfs_req = NULL;
2609         struct get_dfs_referral_rsp *dfs_rsp = NULL;
2610         u32 dfs_req_size = 0, dfs_rsp_size = 0;
2611
2612         cifs_dbg(FYI, "%s: path: %s\n", __func__, search_name);
2613
2614         /*
2615          * Try to use the IPC tcon, otherwise just use any
2616          */
2617         tcon = ses->tcon_ipc;
2618         if (tcon == NULL) {
2619                 spin_lock(&cifs_tcp_ses_lock);
2620                 tcon = list_first_entry_or_null(&ses->tcon_list,
2621                                                 struct cifs_tcon,
2622                                                 tcon_list);
2623                 if (tcon)
2624                         tcon->tc_count++;
2625                 spin_unlock(&cifs_tcp_ses_lock);
2626         }
2627
2628         if (tcon == NULL) {
2629                 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n",
2630                          ses);
2631                 rc = -ENOTCONN;
2632                 goto out;
2633         }
2634
2635         utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX,
2636                                            &utf16_path_len,
2637                                            nls_codepage, remap);
2638         if (!utf16_path) {
2639                 rc = -ENOMEM;
2640                 goto out;
2641         }
2642
2643         dfs_req_size = sizeof(*dfs_req) + utf16_path_len;
2644         dfs_req = kzalloc(dfs_req_size, GFP_KERNEL);
2645         if (!dfs_req) {
2646                 rc = -ENOMEM;
2647                 goto out;
2648         }
2649
2650         /* Highest DFS referral version understood */
2651         dfs_req->MaxReferralLevel = DFS_VERSION;
2652
2653         /* Path to resolve in an UTF-16 null-terminated string */
2654         memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len);
2655
2656         do {
2657                 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
2658                                 FSCTL_DFS_GET_REFERRALS,
2659                                 true /* is_fsctl */,
2660                                 (char *)dfs_req, dfs_req_size, CIFSMaxBufSize,
2661                                 (char **)&dfs_rsp, &dfs_rsp_size);
2662         } while (rc == -EAGAIN);
2663
2664         if (rc) {
2665                 if ((rc != -ENOENT) && (rc != -EOPNOTSUPP))
2666                         cifs_tcon_dbg(VFS, "ioctl error in %s rc=%d\n", __func__, rc);
2667                 goto out;
2668         }
2669
2670         rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size,
2671                                  num_of_nodes, target_nodes,
2672                                  nls_codepage, remap, search_name,
2673                                  true /* is_unicode */);
2674         if (rc) {
2675                 cifs_tcon_dbg(VFS, "parse error in %s rc=%d\n", __func__, rc);
2676                 goto out;
2677         }
2678
2679  out:
2680         if (tcon && !tcon->ipc) {
2681                 /* ipc tcons are not refcounted */
2682                 spin_lock(&cifs_tcp_ses_lock);
2683                 tcon->tc_count--;
2684                 spin_unlock(&cifs_tcp_ses_lock);
2685         }
2686         kfree(utf16_path);
2687         kfree(dfs_req);
2688         kfree(dfs_rsp);
2689         return rc;
2690 }
2691
2692 static int
2693 parse_reparse_posix(struct reparse_posix_data *symlink_buf,
2694                       u32 plen, char **target_path,
2695                       struct cifs_sb_info *cifs_sb)
2696 {
2697         unsigned int len;
2698
2699         /* See MS-FSCC 2.1.2.6 for the 'NFS' style reparse tags */
2700         len = le16_to_cpu(symlink_buf->ReparseDataLength);
2701
2702         if (le64_to_cpu(symlink_buf->InodeType) != NFS_SPECFILE_LNK) {
2703                 cifs_dbg(VFS, "%lld not a supported symlink type\n",
2704                         le64_to_cpu(symlink_buf->InodeType));
2705                 return -EOPNOTSUPP;
2706         }
2707
2708         *target_path = cifs_strndup_from_utf16(
2709                                 symlink_buf->PathBuffer,
2710                                 len, true, cifs_sb->local_nls);
2711         if (!(*target_path))
2712                 return -ENOMEM;
2713
2714         convert_delimiter(*target_path, '/');
2715         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
2716
2717         return 0;
2718 }
2719
2720 static int
2721 parse_reparse_symlink(struct reparse_symlink_data_buffer *symlink_buf,
2722                       u32 plen, char **target_path,
2723                       struct cifs_sb_info *cifs_sb)
2724 {
2725         unsigned int sub_len;
2726         unsigned int sub_offset;
2727
2728         /* We handle Symbolic Link reparse tag here. See: MS-FSCC 2.1.2.4 */
2729
2730         sub_offset = le16_to_cpu(symlink_buf->SubstituteNameOffset);
2731         sub_len = le16_to_cpu(symlink_buf->SubstituteNameLength);
2732         if (sub_offset + 20 > plen ||
2733             sub_offset + sub_len + 20 > plen) {
2734                 cifs_dbg(VFS, "srv returned malformed symlink buffer\n");
2735                 return -EIO;
2736         }
2737
2738         *target_path = cifs_strndup_from_utf16(
2739                                 symlink_buf->PathBuffer + sub_offset,
2740                                 sub_len, true, cifs_sb->local_nls);
2741         if (!(*target_path))
2742                 return -ENOMEM;
2743
2744         convert_delimiter(*target_path, '/');
2745         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
2746
2747         return 0;
2748 }
2749
2750 static int
2751 parse_reparse_point(struct reparse_data_buffer *buf,
2752                     u32 plen, char **target_path,
2753                     struct cifs_sb_info *cifs_sb)
2754 {
2755         if (plen < sizeof(struct reparse_data_buffer)) {
2756                 cifs_dbg(VFS, "reparse buffer is too small. Must be "
2757                          "at least 8 bytes but was %d\n", plen);
2758                 return -EIO;
2759         }
2760
2761         if (plen < le16_to_cpu(buf->ReparseDataLength) +
2762             sizeof(struct reparse_data_buffer)) {
2763                 cifs_dbg(VFS, "srv returned invalid reparse buf "
2764                          "length: %d\n", plen);
2765                 return -EIO;
2766         }
2767
2768         /* See MS-FSCC 2.1.2 */
2769         switch (le32_to_cpu(buf->ReparseTag)) {
2770         case IO_REPARSE_TAG_NFS:
2771                 return parse_reparse_posix(
2772                         (struct reparse_posix_data *)buf,
2773                         plen, target_path, cifs_sb);
2774         case IO_REPARSE_TAG_SYMLINK:
2775                 return parse_reparse_symlink(
2776                         (struct reparse_symlink_data_buffer *)buf,
2777                         plen, target_path, cifs_sb);
2778         default:
2779                 cifs_dbg(VFS, "srv returned unknown symlink buffer "
2780                          "tag:0x%08x\n", le32_to_cpu(buf->ReparseTag));
2781                 return -EOPNOTSUPP;
2782         }
2783 }
2784
2785 #define SMB2_SYMLINK_STRUCT_SIZE \
2786         (sizeof(struct smb2_err_rsp) - 1 + sizeof(struct smb2_symlink_err_rsp))
2787
2788 static int
2789 smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
2790                    struct cifs_sb_info *cifs_sb, const char *full_path,
2791                    char **target_path, bool is_reparse_point)
2792 {
2793         int rc;
2794         __le16 *utf16_path = NULL;
2795         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2796         struct cifs_open_parms oparms;
2797         struct cifs_fid fid;
2798         struct kvec err_iov = {NULL, 0};
2799         struct smb2_err_rsp *err_buf = NULL;
2800         struct smb2_symlink_err_rsp *symlink;
2801         unsigned int sub_len;
2802         unsigned int sub_offset;
2803         unsigned int print_len;
2804         unsigned int print_offset;
2805         int flags = 0;
2806         struct smb_rqst rqst[3];
2807         int resp_buftype[3];
2808         struct kvec rsp_iov[3];
2809         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2810         struct kvec io_iov[SMB2_IOCTL_IOV_SIZE];
2811         struct kvec close_iov[1];
2812         struct smb2_create_rsp *create_rsp;
2813         struct smb2_ioctl_rsp *ioctl_rsp;
2814         struct reparse_data_buffer *reparse_buf;
2815         int create_options = is_reparse_point ? OPEN_REPARSE_POINT : 0;
2816         u32 plen;
2817
2818         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
2819
2820         *target_path = NULL;
2821
2822         if (smb3_encryption_required(tcon))
2823                 flags |= CIFS_TRANSFORM_REQ;
2824
2825         memset(rqst, 0, sizeof(rqst));
2826         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
2827         memset(rsp_iov, 0, sizeof(rsp_iov));
2828
2829         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
2830         if (!utf16_path)
2831                 return -ENOMEM;
2832
2833         /* Open */
2834         memset(&open_iov, 0, sizeof(open_iov));
2835         rqst[0].rq_iov = open_iov;
2836         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2837
2838         memset(&oparms, 0, sizeof(oparms));
2839         oparms.tcon = tcon;
2840         oparms.desired_access = FILE_READ_ATTRIBUTES;
2841         oparms.disposition = FILE_OPEN;
2842         oparms.create_options = cifs_create_options(cifs_sb, create_options);
2843         oparms.fid = &fid;
2844         oparms.reconnect = false;
2845
2846         rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, utf16_path);
2847         if (rc)
2848                 goto querty_exit;
2849         smb2_set_next_command(tcon, &rqst[0]);
2850
2851
2852         /* IOCTL */
2853         memset(&io_iov, 0, sizeof(io_iov));
2854         rqst[1].rq_iov = io_iov;
2855         rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
2856
2857         rc = SMB2_ioctl_init(tcon, &rqst[1], fid.persistent_fid,
2858                              fid.volatile_fid, FSCTL_GET_REPARSE_POINT,
2859                              true /* is_fctl */, NULL, 0,
2860                              CIFSMaxBufSize -
2861                              MAX_SMB2_CREATE_RESPONSE_SIZE -
2862                              MAX_SMB2_CLOSE_RESPONSE_SIZE);
2863         if (rc)
2864                 goto querty_exit;
2865
2866         smb2_set_next_command(tcon, &rqst[1]);
2867         smb2_set_related(&rqst[1]);
2868
2869
2870         /* Close */
2871         memset(&close_iov, 0, sizeof(close_iov));
2872         rqst[2].rq_iov = close_iov;
2873         rqst[2].rq_nvec = 1;
2874
2875         rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
2876         if (rc)
2877                 goto querty_exit;
2878
2879         smb2_set_related(&rqst[2]);
2880
2881         rc = compound_send_recv(xid, tcon->ses, flags, 3, rqst,
2882                                 resp_buftype, rsp_iov);
2883
2884         create_rsp = rsp_iov[0].iov_base;
2885         if (create_rsp && create_rsp->sync_hdr.Status)
2886                 err_iov = rsp_iov[0];
2887         ioctl_rsp = rsp_iov[1].iov_base;
2888
2889         /*
2890          * Open was successful and we got an ioctl response.
2891          */
2892         if ((rc == 0) && (is_reparse_point)) {
2893                 /* See MS-FSCC 2.3.23 */
2894
2895                 reparse_buf = (struct reparse_data_buffer *)
2896                         ((char *)ioctl_rsp +
2897                          le32_to_cpu(ioctl_rsp->OutputOffset));
2898                 plen = le32_to_cpu(ioctl_rsp->OutputCount);
2899
2900                 if (plen + le32_to_cpu(ioctl_rsp->OutputOffset) >
2901                     rsp_iov[1].iov_len) {
2902                         cifs_tcon_dbg(VFS, "srv returned invalid ioctl len: %d\n",
2903                                  plen);
2904                         rc = -EIO;
2905                         goto querty_exit;
2906                 }
2907
2908                 rc = parse_reparse_point(reparse_buf, plen, target_path,
2909                                          cifs_sb);
2910                 goto querty_exit;
2911         }
2912
2913         if (!rc || !err_iov.iov_base) {
2914                 rc = -ENOENT;
2915                 goto querty_exit;
2916         }
2917
2918         err_buf = err_iov.iov_base;
2919         if (le32_to_cpu(err_buf->ByteCount) < sizeof(struct smb2_symlink_err_rsp) ||
2920             err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE) {
2921                 rc = -EINVAL;
2922                 goto querty_exit;
2923         }
2924
2925         symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData;
2926         if (le32_to_cpu(symlink->SymLinkErrorTag) != SYMLINK_ERROR_TAG ||
2927             le32_to_cpu(symlink->ReparseTag) != IO_REPARSE_TAG_SYMLINK) {
2928                 rc = -EINVAL;
2929                 goto querty_exit;
2930         }
2931
2932         /* open must fail on symlink - reset rc */
2933         rc = 0;
2934         sub_len = le16_to_cpu(symlink->SubstituteNameLength);
2935         sub_offset = le16_to_cpu(symlink->SubstituteNameOffset);
2936         print_len = le16_to_cpu(symlink->PrintNameLength);
2937         print_offset = le16_to_cpu(symlink->PrintNameOffset);
2938
2939         if (err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE + sub_offset + sub_len) {
2940                 rc = -EINVAL;
2941                 goto querty_exit;
2942         }
2943
2944         if (err_iov.iov_len <
2945             SMB2_SYMLINK_STRUCT_SIZE + print_offset + print_len) {
2946                 rc = -EINVAL;
2947                 goto querty_exit;
2948         }
2949
2950         *target_path = cifs_strndup_from_utf16(
2951                                 (char *)symlink->PathBuffer + sub_offset,
2952                                 sub_len, true, cifs_sb->local_nls);
2953         if (!(*target_path)) {
2954                 rc = -ENOMEM;
2955                 goto querty_exit;
2956         }
2957         convert_delimiter(*target_path, '/');
2958         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
2959
2960  querty_exit:
2961         cifs_dbg(FYI, "query symlink rc %d\n", rc);
2962         kfree(utf16_path);
2963         SMB2_open_free(&rqst[0]);
2964         SMB2_ioctl_free(&rqst[1]);
2965         SMB2_close_free(&rqst[2]);
2966         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2967         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2968         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
2969         return rc;
2970 }
2971
2972 static struct cifs_ntsd *
2973 get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb,
2974                 const struct cifs_fid *cifsfid, u32 *pacllen)
2975 {
2976         struct cifs_ntsd *pntsd = NULL;
2977         unsigned int xid;
2978         int rc = -EOPNOTSUPP;
2979         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
2980
2981         if (IS_ERR(tlink))
2982                 return ERR_CAST(tlink);
2983
2984         xid = get_xid();
2985         cifs_dbg(FYI, "trying to get acl\n");
2986
2987         rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid,
2988                             cifsfid->volatile_fid, (void **)&pntsd, pacllen);
2989         free_xid(xid);
2990
2991         cifs_put_tlink(tlink);
2992
2993         cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
2994         if (rc)
2995                 return ERR_PTR(rc);
2996         return pntsd;
2997
2998 }
2999
3000 static struct cifs_ntsd *
3001 get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb,
3002                 const char *path, u32 *pacllen)
3003 {
3004         struct cifs_ntsd *pntsd = NULL;
3005         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3006         unsigned int xid;
3007         int rc;
3008         struct cifs_tcon *tcon;
3009         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3010         struct cifs_fid fid;
3011         struct cifs_open_parms oparms;
3012         __le16 *utf16_path;
3013
3014         cifs_dbg(FYI, "get smb3 acl for path %s\n", path);
3015         if (IS_ERR(tlink))
3016                 return ERR_CAST(tlink);
3017
3018         tcon = tlink_tcon(tlink);
3019         xid = get_xid();
3020
3021         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
3022         if (!utf16_path) {
3023                 rc = -ENOMEM;
3024                 free_xid(xid);
3025                 return ERR_PTR(rc);
3026         }
3027
3028         oparms.tcon = tcon;
3029         oparms.desired_access = READ_CONTROL;
3030         oparms.disposition = FILE_OPEN;
3031         oparms.create_options = cifs_create_options(cifs_sb, 0);
3032         oparms.fid = &fid;
3033         oparms.reconnect = false;
3034
3035         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
3036                        NULL);
3037         kfree(utf16_path);
3038         if (!rc) {
3039                 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3040                             fid.volatile_fid, (void **)&pntsd, pacllen);
3041                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3042         }
3043
3044         cifs_put_tlink(tlink);
3045         free_xid(xid);
3046
3047         cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
3048         if (rc)
3049                 return ERR_PTR(rc);
3050         return pntsd;
3051 }
3052
3053 static int
3054 set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
3055                 struct inode *inode, const char *path, int aclflag)
3056 {
3057         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3058         unsigned int xid;
3059         int rc, access_flags = 0;
3060         struct cifs_tcon *tcon;
3061         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
3062         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3063         struct cifs_fid fid;
3064         struct cifs_open_parms oparms;
3065         __le16 *utf16_path;
3066
3067         cifs_dbg(FYI, "set smb3 acl for path %s\n", path);
3068         if (IS_ERR(tlink))
3069                 return PTR_ERR(tlink);
3070
3071         tcon = tlink_tcon(tlink);
3072         xid = get_xid();
3073
3074         if (aclflag == CIFS_ACL_OWNER || aclflag == CIFS_ACL_GROUP)
3075                 access_flags = WRITE_OWNER;
3076         else
3077                 access_flags = WRITE_DAC;
3078
3079         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
3080         if (!utf16_path) {
3081                 rc = -ENOMEM;
3082                 free_xid(xid);
3083                 return rc;
3084         }
3085
3086         oparms.tcon = tcon;
3087         oparms.desired_access = access_flags;
3088         oparms.create_options = cifs_create_options(cifs_sb, 0);
3089         oparms.disposition = FILE_OPEN;
3090         oparms.path = path;
3091         oparms.fid = &fid;
3092         oparms.reconnect = false;
3093
3094         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL,
3095                        NULL, NULL);
3096         kfree(utf16_path);
3097         if (!rc) {
3098                 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3099                             fid.volatile_fid, pnntsd, acllen, aclflag);
3100                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3101         }
3102
3103         cifs_put_tlink(tlink);
3104         free_xid(xid);
3105         return rc;
3106 }
3107
3108 /* Retrieve an ACL from the server */
3109 static struct cifs_ntsd *
3110 get_smb2_acl(struct cifs_sb_info *cifs_sb,
3111                                       struct inode *inode, const char *path,
3112                                       u32 *pacllen)
3113 {
3114         struct cifs_ntsd *pntsd = NULL;
3115         struct cifsFileInfo *open_file = NULL;
3116
3117         if (inode)
3118                 open_file = find_readable_file(CIFS_I(inode), true);
3119         if (!open_file)
3120                 return get_smb2_acl_by_path(cifs_sb, path, pacllen);
3121
3122         pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen);
3123         cifsFileInfo_put(open_file);
3124         return pntsd;
3125 }
3126
3127 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
3128                             loff_t offset, loff_t len, bool keep_size)
3129 {
3130         struct cifs_ses *ses = tcon->ses;
3131         struct inode *inode;
3132         struct cifsInodeInfo *cifsi;
3133         struct cifsFileInfo *cfile = file->private_data;
3134         struct file_zero_data_information fsctl_buf;
3135         long rc;
3136         unsigned int xid;
3137         __le64 eof;
3138
3139         xid = get_xid();
3140
3141         inode = d_inode(cfile->dentry);
3142         cifsi = CIFS_I(inode);
3143
3144         trace_smb3_zero_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3145                               ses->Suid, offset, len);
3146
3147
3148         /* if file not oplocked can't be sure whether asking to extend size */
3149         if (!CIFS_CACHE_READ(cifsi))
3150                 if (keep_size == false) {
3151                         rc = -EOPNOTSUPP;
3152                         trace_smb3_zero_err(xid, cfile->fid.persistent_fid,
3153                                 tcon->tid, ses->Suid, offset, len, rc);
3154                         free_xid(xid);
3155                         return rc;
3156                 }
3157
3158         cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3159
3160         fsctl_buf.FileOffset = cpu_to_le64(offset);
3161         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3162
3163         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3164                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA, true,
3165                         (char *)&fsctl_buf,
3166                         sizeof(struct file_zero_data_information),
3167                         0, NULL, NULL);
3168         if (rc)
3169                 goto zero_range_exit;
3170
3171         /*
3172          * do we also need to change the size of the file?
3173          */
3174         if (keep_size == false && i_size_read(inode) < offset + len) {
3175                 eof = cpu_to_le64(offset + len);
3176                 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3177                                   cfile->fid.volatile_fid, cfile->pid, &eof);
3178         }
3179
3180  zero_range_exit:
3181         free_xid(xid);
3182         if (rc)
3183                 trace_smb3_zero_err(xid, cfile->fid.persistent_fid, tcon->tid,
3184                               ses->Suid, offset, len, rc);
3185         else
3186                 trace_smb3_zero_done(xid, cfile->fid.persistent_fid, tcon->tid,
3187                               ses->Suid, offset, len);
3188         return rc;
3189 }
3190
3191 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
3192                             loff_t offset, loff_t len)
3193 {
3194         struct inode *inode;
3195         struct cifsFileInfo *cfile = file->private_data;
3196         struct file_zero_data_information fsctl_buf;
3197         long rc;
3198         unsigned int xid;
3199         __u8 set_sparse = 1;
3200
3201         xid = get_xid();
3202
3203         inode = d_inode(cfile->dentry);
3204
3205         /* Need to make file sparse, if not already, before freeing range. */
3206         /* Consider adding equivalent for compressed since it could also work */
3207         if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) {
3208                 rc = -EOPNOTSUPP;
3209                 free_xid(xid);
3210                 return rc;
3211         }
3212
3213         cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3214
3215         fsctl_buf.FileOffset = cpu_to_le64(offset);
3216         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3217
3218         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3219                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
3220                         true /* is_fctl */, (char *)&fsctl_buf,
3221                         sizeof(struct file_zero_data_information),
3222                         CIFSMaxBufSize, NULL, NULL);
3223         free_xid(xid);
3224         return rc;
3225 }
3226
3227 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
3228                             loff_t off, loff_t len, bool keep_size)
3229 {
3230         struct inode *inode;
3231         struct cifsInodeInfo *cifsi;
3232         struct cifsFileInfo *cfile = file->private_data;
3233         long rc = -EOPNOTSUPP;
3234         unsigned int xid;
3235         __le64 eof;
3236
3237         xid = get_xid();
3238
3239         inode = d_inode(cfile->dentry);
3240         cifsi = CIFS_I(inode);
3241
3242         trace_smb3_falloc_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3243                                 tcon->ses->Suid, off, len);
3244         /* if file not oplocked can't be sure whether asking to extend size */
3245         if (!CIFS_CACHE_READ(cifsi))
3246                 if (keep_size == false) {
3247                         trace_smb3_falloc_err(xid, cfile->fid.persistent_fid,
3248                                 tcon->tid, tcon->ses->Suid, off, len, rc);
3249                         free_xid(xid);
3250                         return rc;
3251                 }
3252
3253         /*
3254          * Extending the file
3255          */
3256         if ((keep_size == false) && i_size_read(inode) < off + len) {
3257                 rc = inode_newsize_ok(inode, off + len);
3258                 if (rc)
3259                         goto out;
3260
3261                 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0)
3262                         smb2_set_sparse(xid, tcon, cfile, inode, false);
3263
3264                 eof = cpu_to_le64(off + len);
3265                 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3266                                   cfile->fid.volatile_fid, cfile->pid, &eof);
3267                 if (rc == 0) {
3268                         cifsi->server_eof = off + len;
3269                         cifs_setsize(inode, off + len);
3270                         cifs_truncate_page(inode->i_mapping, inode->i_size);
3271                         truncate_setsize(inode, off + len);
3272                 }
3273                 goto out;
3274         }
3275
3276         /*
3277          * Files are non-sparse by default so falloc may be a no-op
3278          * Must check if file sparse. If not sparse, and since we are not
3279          * extending then no need to do anything since file already allocated
3280          */
3281         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
3282                 rc = 0;
3283                 goto out;
3284         }
3285
3286         if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
3287                 /*
3288                  * Check if falloc starts within first few pages of file
3289                  * and ends within a few pages of the end of file to
3290                  * ensure that most of file is being forced to be
3291                  * fallocated now. If so then setting whole file sparse
3292                  * ie potentially making a few extra pages at the beginning
3293                  * or end of the file non-sparse via set_sparse is harmless.
3294                  */
3295                 if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) {
3296                         rc = -EOPNOTSUPP;
3297                         goto out;
3298                 }
3299         }
3300
3301         smb2_set_sparse(xid, tcon, cfile, inode, false);
3302         rc = 0;
3303
3304 out:
3305         if (rc)
3306                 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid,
3307                                 tcon->ses->Suid, off, len, rc);
3308         else
3309                 trace_smb3_falloc_done(xid, cfile->fid.persistent_fid, tcon->tid,
3310                                 tcon->ses->Suid, off, len);
3311
3312         free_xid(xid);
3313         return rc;
3314 }
3315
3316 static loff_t smb3_llseek(struct file *file, struct cifs_tcon *tcon, loff_t offset, int whence)
3317 {
3318         struct cifsFileInfo *wrcfile, *cfile = file->private_data;
3319         struct cifsInodeInfo *cifsi;
3320         struct inode *inode;
3321         int rc = 0;
3322         struct file_allocated_range_buffer in_data, *out_data = NULL;
3323         u32 out_data_len;
3324         unsigned int xid;
3325
3326         if (whence != SEEK_HOLE && whence != SEEK_DATA)
3327                 return generic_file_llseek(file, offset, whence);
3328
3329         inode = d_inode(cfile->dentry);
3330         cifsi = CIFS_I(inode);
3331
3332         if (offset < 0 || offset >= i_size_read(inode))
3333                 return -ENXIO;
3334
3335         xid = get_xid();
3336         /*
3337          * We need to be sure that all dirty pages are written as they
3338          * might fill holes on the server.
3339          * Note that we also MUST flush any written pages since at least
3340          * some servers (Windows2016) will not reflect recent writes in
3341          * QUERY_ALLOCATED_RANGES until SMB2_flush is called.
3342          */
3343         wrcfile = find_writable_file(cifsi, FIND_WR_ANY);
3344         if (wrcfile) {
3345                 filemap_write_and_wait(inode->i_mapping);
3346                 smb2_flush_file(xid, tcon, &wrcfile->fid);
3347                 cifsFileInfo_put(wrcfile);
3348         }
3349
3350         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) {
3351                 if (whence == SEEK_HOLE)
3352                         offset = i_size_read(inode);
3353                 goto lseek_exit;
3354         }
3355
3356         in_data.file_offset = cpu_to_le64(offset);
3357         in_data.length = cpu_to_le64(i_size_read(inode));
3358
3359         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3360                         cfile->fid.volatile_fid,
3361                         FSCTL_QUERY_ALLOCATED_RANGES, true,
3362                         (char *)&in_data, sizeof(in_data),
3363                         sizeof(struct file_allocated_range_buffer),
3364                         (char **)&out_data, &out_data_len);
3365         if (rc == -E2BIG)
3366                 rc = 0;
3367         if (rc)
3368                 goto lseek_exit;
3369
3370         if (whence == SEEK_HOLE && out_data_len == 0)
3371                 goto lseek_exit;
3372
3373         if (whence == SEEK_DATA && out_data_len == 0) {
3374                 rc = -ENXIO;
3375                 goto lseek_exit;
3376         }
3377
3378         if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3379                 rc = -EINVAL;
3380                 goto lseek_exit;
3381         }
3382         if (whence == SEEK_DATA) {
3383                 offset = le64_to_cpu(out_data->file_offset);
3384                 goto lseek_exit;
3385         }
3386         if (offset < le64_to_cpu(out_data->file_offset))
3387                 goto lseek_exit;
3388
3389         offset = le64_to_cpu(out_data->file_offset) + le64_to_cpu(out_data->length);
3390
3391  lseek_exit:
3392         free_xid(xid);
3393         kfree(out_data);
3394         if (!rc)
3395                 return vfs_setpos(file, offset, inode->i_sb->s_maxbytes);
3396         else
3397                 return rc;
3398 }
3399
3400 static int smb3_fiemap(struct cifs_tcon *tcon,
3401                        struct cifsFileInfo *cfile,
3402                        struct fiemap_extent_info *fei, u64 start, u64 len)
3403 {
3404         unsigned int xid;
3405         struct file_allocated_range_buffer in_data, *out_data;
3406         u32 out_data_len;
3407         int i, num, rc, flags, last_blob;
3408         u64 next;
3409
3410         if (fiemap_check_flags(fei, FIEMAP_FLAG_SYNC))
3411                 return -EBADR;
3412
3413         xid = get_xid();
3414  again:
3415         in_data.file_offset = cpu_to_le64(start);
3416         in_data.length = cpu_to_le64(len);
3417
3418         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3419                         cfile->fid.volatile_fid,
3420                         FSCTL_QUERY_ALLOCATED_RANGES, true,
3421                         (char *)&in_data, sizeof(in_data),
3422                         1024 * sizeof(struct file_allocated_range_buffer),
3423                         (char **)&out_data, &out_data_len);
3424         if (rc == -E2BIG) {
3425                 last_blob = 0;
3426                 rc = 0;
3427         } else
3428                 last_blob = 1;
3429         if (rc)
3430                 goto out;
3431
3432         if (out_data_len && out_data_len < sizeof(struct file_allocated_range_buffer)) {
3433                 rc = -EINVAL;
3434                 goto out;
3435         }
3436         if (out_data_len % sizeof(struct file_allocated_range_buffer)) {
3437                 rc = -EINVAL;
3438                 goto out;
3439         }
3440
3441         num = out_data_len / sizeof(struct file_allocated_range_buffer);
3442         for (i = 0; i < num; i++) {
3443                 flags = 0;
3444                 if (i == num - 1 && last_blob)
3445                         flags |= FIEMAP_EXTENT_LAST;
3446
3447                 rc = fiemap_fill_next_extent(fei,
3448                                 le64_to_cpu(out_data[i].file_offset),
3449                                 le64_to_cpu(out_data[i].file_offset),
3450                                 le64_to_cpu(out_data[i].length),
3451                                 flags);
3452                 if (rc < 0)
3453                         goto out;
3454                 if (rc == 1) {
3455                         rc = 0;
3456                         goto out;
3457                 }
3458         }
3459
3460         if (!last_blob) {
3461                 next = le64_to_cpu(out_data[num - 1].file_offset) +
3462                   le64_to_cpu(out_data[num - 1].length);
3463                 len = len - (next - start);
3464                 start = next;
3465                 goto again;
3466         }
3467
3468  out:
3469         free_xid(xid);
3470         kfree(out_data);
3471         return rc;
3472 }
3473
3474 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
3475                            loff_t off, loff_t len)
3476 {
3477         /* KEEP_SIZE already checked for by do_fallocate */
3478         if (mode & FALLOC_FL_PUNCH_HOLE)
3479                 return smb3_punch_hole(file, tcon, off, len);
3480         else if (mode & FALLOC_FL_ZERO_RANGE) {
3481                 if (mode & FALLOC_FL_KEEP_SIZE)
3482                         return smb3_zero_range(file, tcon, off, len, true);
3483                 return smb3_zero_range(file, tcon, off, len, false);
3484         } else if (mode == FALLOC_FL_KEEP_SIZE)
3485                 return smb3_simple_falloc(file, tcon, off, len, true);
3486         else if (mode == 0)
3487                 return smb3_simple_falloc(file, tcon, off, len, false);
3488
3489         return -EOPNOTSUPP;
3490 }
3491
3492 static void
3493 smb2_downgrade_oplock(struct TCP_Server_Info *server,
3494                       struct cifsInodeInfo *cinode, __u32 oplock,
3495                       unsigned int epoch, bool *purge_cache)
3496 {
3497         server->ops->set_oplock_level(cinode, oplock, 0, NULL);
3498 }
3499
3500 static void
3501 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3502                        unsigned int epoch, bool *purge_cache);
3503
3504 static void
3505 smb3_downgrade_oplock(struct TCP_Server_Info *server,
3506                        struct cifsInodeInfo *cinode, __u32 oplock,
3507                        unsigned int epoch, bool *purge_cache)
3508 {
3509         unsigned int old_state = cinode->oplock;
3510         unsigned int old_epoch = cinode->epoch;
3511         unsigned int new_state;
3512
3513         if (epoch > old_epoch) {
3514                 smb21_set_oplock_level(cinode, oplock, 0, NULL);
3515                 cinode->epoch = epoch;
3516         }
3517
3518         new_state = cinode->oplock;
3519         *purge_cache = false;
3520
3521         if ((old_state & CIFS_CACHE_READ_FLG) != 0 &&
3522             (new_state & CIFS_CACHE_READ_FLG) == 0)
3523                 *purge_cache = true;
3524         else if (old_state == new_state && (epoch - old_epoch > 1))
3525                 *purge_cache = true;
3526 }
3527
3528 static void
3529 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3530                       unsigned int epoch, bool *purge_cache)
3531 {
3532         oplock &= 0xFF;
3533         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
3534                 return;
3535         if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
3536                 cinode->oplock = CIFS_CACHE_RHW_FLG;
3537                 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
3538                          &cinode->vfs_inode);
3539         } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
3540                 cinode->oplock = CIFS_CACHE_RW_FLG;
3541                 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
3542                          &cinode->vfs_inode);
3543         } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
3544                 cinode->oplock = CIFS_CACHE_READ_FLG;
3545                 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
3546                          &cinode->vfs_inode);
3547         } else
3548                 cinode->oplock = 0;
3549 }
3550
3551 static void
3552 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3553                        unsigned int epoch, bool *purge_cache)
3554 {
3555         char message[5] = {0};
3556         unsigned int new_oplock = 0;
3557
3558         oplock &= 0xFF;
3559         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
3560                 return;
3561
3562         /* Check if the server granted an oplock rather than a lease */
3563         if (oplock & SMB2_OPLOCK_LEVEL_EXCLUSIVE)
3564                 return smb2_set_oplock_level(cinode, oplock, epoch,
3565                                              purge_cache);
3566
3567         if (oplock & SMB2_LEASE_READ_CACHING_HE) {
3568                 new_oplock |= CIFS_CACHE_READ_FLG;
3569                 strcat(message, "R");
3570         }
3571         if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
3572                 new_oplock |= CIFS_CACHE_HANDLE_FLG;
3573                 strcat(message, "H");
3574         }
3575         if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
3576                 new_oplock |= CIFS_CACHE_WRITE_FLG;
3577                 strcat(message, "W");
3578         }
3579         if (!new_oplock)
3580                 strncpy(message, "None", sizeof(message));
3581
3582         cinode->oplock = new_oplock;
3583         cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
3584                  &cinode->vfs_inode);
3585 }
3586
3587 static void
3588 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3589                       unsigned int epoch, bool *purge_cache)
3590 {
3591         unsigned int old_oplock = cinode->oplock;
3592
3593         smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
3594
3595         if (purge_cache) {
3596                 *purge_cache = false;
3597                 if (old_oplock == CIFS_CACHE_READ_FLG) {
3598                         if (cinode->oplock == CIFS_CACHE_READ_FLG &&
3599                             (epoch - cinode->epoch > 0))
3600                                 *purge_cache = true;
3601                         else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
3602                                  (epoch - cinode->epoch > 1))
3603                                 *purge_cache = true;
3604                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
3605                                  (epoch - cinode->epoch > 1))
3606                                 *purge_cache = true;
3607                         else if (cinode->oplock == 0 &&
3608                                  (epoch - cinode->epoch > 0))
3609                                 *purge_cache = true;
3610                 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
3611                         if (cinode->oplock == CIFS_CACHE_RH_FLG &&
3612                             (epoch - cinode->epoch > 0))
3613                                 *purge_cache = true;
3614                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
3615                                  (epoch - cinode->epoch > 1))
3616                                 *purge_cache = true;
3617                 }
3618                 cinode->epoch = epoch;
3619         }
3620 }
3621
3622 static bool
3623 smb2_is_read_op(__u32 oplock)
3624 {
3625         return oplock == SMB2_OPLOCK_LEVEL_II;
3626 }
3627
3628 static bool
3629 smb21_is_read_op(__u32 oplock)
3630 {
3631         return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
3632                !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
3633 }
3634
3635 static __le32
3636 map_oplock_to_lease(u8 oplock)
3637 {
3638         if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
3639                 return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING;
3640         else if (oplock == SMB2_OPLOCK_LEVEL_II)
3641                 return SMB2_LEASE_READ_CACHING;
3642         else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
3643                 return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING |
3644                        SMB2_LEASE_WRITE_CACHING;
3645         return 0;
3646 }
3647
3648 static char *
3649 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
3650 {
3651         struct create_lease *buf;
3652
3653         buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
3654         if (!buf)
3655                 return NULL;
3656
3657         memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
3658         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
3659
3660         buf->ccontext.DataOffset = cpu_to_le16(offsetof
3661                                         (struct create_lease, lcontext));
3662         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
3663         buf->ccontext.NameOffset = cpu_to_le16(offsetof
3664                                 (struct create_lease, Name));
3665         buf->ccontext.NameLength = cpu_to_le16(4);
3666         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
3667         buf->Name[0] = 'R';
3668         buf->Name[1] = 'q';
3669         buf->Name[2] = 'L';
3670         buf->Name[3] = 's';
3671         return (char *)buf;
3672 }
3673
3674 static char *
3675 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
3676 {
3677         struct create_lease_v2 *buf;
3678
3679         buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
3680         if (!buf)
3681                 return NULL;
3682
3683         memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
3684         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
3685
3686         buf->ccontext.DataOffset = cpu_to_le16(offsetof
3687                                         (struct create_lease_v2, lcontext));
3688         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
3689         buf->ccontext.NameOffset = cpu_to_le16(offsetof
3690                                 (struct create_lease_v2, Name));
3691         buf->ccontext.NameLength = cpu_to_le16(4);
3692         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
3693         buf->Name[0] = 'R';
3694         buf->Name[1] = 'q';
3695         buf->Name[2] = 'L';
3696         buf->Name[3] = 's';
3697         return (char *)buf;
3698 }
3699
3700 static __u8
3701 smb2_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
3702 {
3703         struct create_lease *lc = (struct create_lease *)buf;
3704
3705         *epoch = 0; /* not used */
3706         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
3707                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
3708         return le32_to_cpu(lc->lcontext.LeaseState);
3709 }
3710
3711 static __u8
3712 smb3_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
3713 {
3714         struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
3715
3716         *epoch = le16_to_cpu(lc->lcontext.Epoch);
3717         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
3718                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
3719         if (lease_key)
3720                 memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE);
3721         return le32_to_cpu(lc->lcontext.LeaseState);
3722 }
3723
3724 static unsigned int
3725 smb2_wp_retry_size(struct inode *inode)
3726 {
3727         return min_t(unsigned int, CIFS_SB(inode->i_sb)->wsize,
3728                      SMB2_MAX_BUFFER_SIZE);
3729 }
3730
3731 static bool
3732 smb2_dir_needs_close(struct cifsFileInfo *cfile)
3733 {
3734         return !cfile->invalidHandle;
3735 }
3736
3737 static void
3738 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len,
3739                    struct smb_rqst *old_rq, __le16 cipher_type)
3740 {
3741         struct smb2_sync_hdr *shdr =
3742                         (struct smb2_sync_hdr *)old_rq->rq_iov[0].iov_base;
3743
3744         memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
3745         tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
3746         tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
3747         tr_hdr->Flags = cpu_to_le16(0x01);
3748         if (cipher_type == SMB2_ENCRYPTION_AES128_GCM)
3749                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES128GCM_NONCE);
3750         else
3751                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES128CCM_NONCE);
3752         memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8);
3753 }
3754
3755 /* We can not use the normal sg_set_buf() as we will sometimes pass a
3756  * stack object as buf.
3757  */
3758 static inline void smb2_sg_set_buf(struct scatterlist *sg, const void *buf,
3759                                    unsigned int buflen)
3760 {
3761         void *addr;
3762         /*
3763          * VMAP_STACK (at least) puts stack into the vmalloc address space
3764          */
3765         if (is_vmalloc_addr(buf))
3766                 addr = vmalloc_to_page(buf);
3767         else
3768                 addr = virt_to_page(buf);
3769         sg_set_page(sg, addr, buflen, offset_in_page(buf));
3770 }
3771
3772 /* Assumes the first rqst has a transform header as the first iov.
3773  * I.e.
3774  * rqst[0].rq_iov[0]  is transform header
3775  * rqst[0].rq_iov[1+] data to be encrypted/decrypted
3776  * rqst[1+].rq_iov[0+] data to be encrypted/decrypted
3777  */
3778 static struct scatterlist *
3779 init_sg(int num_rqst, struct smb_rqst *rqst, u8 *sign)
3780 {
3781         unsigned int sg_len;
3782         struct scatterlist *sg;
3783         unsigned int i;
3784         unsigned int j;
3785         unsigned int idx = 0;
3786         int skip;
3787
3788         sg_len = 1;
3789         for (i = 0; i < num_rqst; i++)
3790                 sg_len += rqst[i].rq_nvec + rqst[i].rq_npages;
3791
3792         sg = kmalloc_array(sg_len, sizeof(struct scatterlist), GFP_KERNEL);
3793         if (!sg)
3794                 return NULL;
3795
3796         sg_init_table(sg, sg_len);
3797         for (i = 0; i < num_rqst; i++) {
3798                 for (j = 0; j < rqst[i].rq_nvec; j++) {
3799                         /*
3800                          * The first rqst has a transform header where the
3801                          * first 20 bytes are not part of the encrypted blob
3802                          */
3803                         skip = (i == 0) && (j == 0) ? 20 : 0;
3804                         smb2_sg_set_buf(&sg[idx++],
3805                                         rqst[i].rq_iov[j].iov_base + skip,
3806                                         rqst[i].rq_iov[j].iov_len - skip);
3807                         }
3808
3809                 for (j = 0; j < rqst[i].rq_npages; j++) {
3810                         unsigned int len, offset;
3811
3812                         rqst_page_get_length(&rqst[i], j, &len, &offset);
3813                         sg_set_page(&sg[idx++], rqst[i].rq_pages[j], len, offset);
3814                 }
3815         }
3816         smb2_sg_set_buf(&sg[idx], sign, SMB2_SIGNATURE_SIZE);
3817         return sg;
3818 }
3819
3820 static int
3821 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)
3822 {
3823         struct cifs_ses *ses;
3824         u8 *ses_enc_key;
3825
3826         spin_lock(&cifs_tcp_ses_lock);
3827         list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
3828                 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
3829                         if (ses->Suid == ses_id) {
3830                                 ses_enc_key = enc ? ses->smb3encryptionkey :
3831                                         ses->smb3decryptionkey;
3832                                 memcpy(key, ses_enc_key, SMB3_SIGN_KEY_SIZE);
3833                                 spin_unlock(&cifs_tcp_ses_lock);
3834                                 return 0;
3835                         }
3836                 }
3837         }
3838         spin_unlock(&cifs_tcp_ses_lock);
3839
3840         return 1;
3841 }
3842 /*
3843  * Encrypt or decrypt @rqst message. @rqst[0] has the following format:
3844  * iov[0]   - transform header (associate data),
3845  * iov[1-N] - SMB2 header and pages - data to encrypt.
3846  * On success return encrypted data in iov[1-N] and pages, leave iov[0]
3847  * untouched.
3848  */
3849 static int
3850 crypt_message(struct TCP_Server_Info *server, int num_rqst,
3851               struct smb_rqst *rqst, int enc)
3852 {
3853         struct smb2_transform_hdr *tr_hdr =
3854                 (struct smb2_transform_hdr *)rqst[0].rq_iov[0].iov_base;
3855         unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20;
3856         int rc = 0;
3857         struct scatterlist *sg;
3858         u8 sign[SMB2_SIGNATURE_SIZE] = {};
3859         u8 key[SMB3_SIGN_KEY_SIZE];
3860         struct aead_request *req;
3861         char *iv;
3862         unsigned int iv_len;
3863         DECLARE_CRYPTO_WAIT(wait);
3864         struct crypto_aead *tfm;
3865         unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
3866
3867         rc = smb2_get_enc_key(server, tr_hdr->SessionId, enc, key);
3868         if (rc) {
3869                 cifs_server_dbg(VFS, "%s: Could not get %scryption key\n", __func__,
3870                          enc ? "en" : "de");
3871                 return 0;
3872         }
3873
3874         rc = smb3_crypto_aead_allocate(server);
3875         if (rc) {
3876                 cifs_server_dbg(VFS, "%s: crypto alloc failed\n", __func__);
3877                 return rc;
3878         }
3879
3880         tfm = enc ? server->secmech.ccmaesencrypt :
3881                                                 server->secmech.ccmaesdecrypt;
3882         rc = crypto_aead_setkey(tfm, key, SMB3_SIGN_KEY_SIZE);
3883         if (rc) {
3884                 cifs_server_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc);
3885                 return rc;
3886         }
3887
3888         rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE);
3889         if (rc) {
3890                 cifs_server_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc);
3891                 return rc;
3892         }
3893
3894         req = aead_request_alloc(tfm, GFP_KERNEL);
3895         if (!req) {
3896                 cifs_server_dbg(VFS, "%s: Failed to alloc aead request\n", __func__);
3897                 return -ENOMEM;
3898         }
3899
3900         if (!enc) {
3901                 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE);
3902                 crypt_len += SMB2_SIGNATURE_SIZE;
3903         }
3904
3905         sg = init_sg(num_rqst, rqst, sign);
3906         if (!sg) {
3907                 cifs_server_dbg(VFS, "%s: Failed to init sg\n", __func__);
3908                 rc = -ENOMEM;
3909                 goto free_req;
3910         }
3911
3912         iv_len = crypto_aead_ivsize(tfm);
3913         iv = kzalloc(iv_len, GFP_KERNEL);
3914         if (!iv) {
3915                 cifs_server_dbg(VFS, "%s: Failed to alloc iv\n", __func__);
3916                 rc = -ENOMEM;
3917                 goto free_sg;
3918         }
3919
3920         if (server->cipher_type == SMB2_ENCRYPTION_AES128_GCM)
3921                 memcpy(iv, (char *)tr_hdr->Nonce, SMB3_AES128GCM_NONCE);
3922         else {
3923                 iv[0] = 3;
3924                 memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES128CCM_NONCE);
3925         }
3926
3927         aead_request_set_crypt(req, sg, sg, crypt_len, iv);
3928         aead_request_set_ad(req, assoc_data_len);
3929
3930         aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
3931                                   crypto_req_done, &wait);
3932
3933         rc = crypto_wait_req(enc ? crypto_aead_encrypt(req)
3934                                 : crypto_aead_decrypt(req), &wait);
3935
3936         if (!rc && enc)
3937                 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE);
3938
3939         kfree(iv);
3940 free_sg:
3941         kfree(sg);
3942 free_req:
3943         kfree(req);
3944         return rc;
3945 }
3946
3947 void
3948 smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst)
3949 {
3950         int i, j;
3951
3952         for (i = 0; i < num_rqst; i++) {
3953                 if (rqst[i].rq_pages) {
3954                         for (j = rqst[i].rq_npages - 1; j >= 0; j--)
3955                                 put_page(rqst[i].rq_pages[j]);
3956                         kfree(rqst[i].rq_pages);
3957                 }
3958         }
3959 }
3960
3961 /*
3962  * This function will initialize new_rq and encrypt the content.
3963  * The first entry, new_rq[0], only contains a single iov which contains
3964  * a smb2_transform_hdr and is pre-allocated by the caller.
3965  * This function then populates new_rq[1+] with the content from olq_rq[0+].
3966  *
3967  * The end result is an array of smb_rqst structures where the first structure
3968  * only contains a single iov for the transform header which we then can pass
3969  * to crypt_message().
3970  *
3971  * new_rq[0].rq_iov[0] :  smb2_transform_hdr pre-allocated by the caller
3972  * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests
3973  */
3974 static int
3975 smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst,
3976                        struct smb_rqst *new_rq, struct smb_rqst *old_rq)
3977 {
3978         struct page **pages;
3979         struct smb2_transform_hdr *tr_hdr = new_rq[0].rq_iov[0].iov_base;
3980         unsigned int npages;
3981         unsigned int orig_len = 0;
3982         int i, j;
3983         int rc = -ENOMEM;
3984
3985         for (i = 1; i < num_rqst; i++) {
3986                 npages = old_rq[i - 1].rq_npages;
3987                 pages = kmalloc_array(npages, sizeof(struct page *),
3988                                       GFP_KERNEL);
3989                 if (!pages)
3990                         goto err_free;
3991
3992                 new_rq[i].rq_pages = pages;
3993                 new_rq[i].rq_npages = npages;
3994                 new_rq[i].rq_offset = old_rq[i - 1].rq_offset;
3995                 new_rq[i].rq_pagesz = old_rq[i - 1].rq_pagesz;
3996                 new_rq[i].rq_tailsz = old_rq[i - 1].rq_tailsz;
3997                 new_rq[i].rq_iov = old_rq[i - 1].rq_iov;
3998                 new_rq[i].rq_nvec = old_rq[i - 1].rq_nvec;
3999
4000                 orig_len += smb_rqst_len(server, &old_rq[i - 1]);
4001
4002                 for (j = 0; j < npages; j++) {
4003                         pages[j] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
4004                         if (!pages[j])
4005                                 goto err_free;
4006                 }
4007
4008                 /* copy pages form the old */
4009                 for (j = 0; j < npages; j++) {
4010                         char *dst, *src;
4011                         unsigned int offset, len;
4012
4013                         rqst_page_get_length(&new_rq[i], j, &len, &offset);
4014
4015                         dst = (char *) kmap(new_rq[i].rq_pages[j]) + offset;
4016                         src = (char *) kmap(old_rq[i - 1].rq_pages[j]) + offset;
4017
4018                         memcpy(dst, src, len);
4019                         kunmap(new_rq[i].rq_pages[j]);
4020                         kunmap(old_rq[i - 1].rq_pages[j]);
4021                 }
4022         }
4023
4024         /* fill the 1st iov with a transform header */
4025         fill_transform_hdr(tr_hdr, orig_len, old_rq, server->cipher_type);
4026
4027         rc = crypt_message(server, num_rqst, new_rq, 1);
4028         cifs_dbg(FYI, "Encrypt message returned %d\n", rc);
4029         if (rc)
4030                 goto err_free;
4031
4032         return rc;
4033
4034 err_free:
4035         smb3_free_compound_rqst(num_rqst - 1, &new_rq[1]);
4036         return rc;
4037 }
4038
4039 static int
4040 smb3_is_transform_hdr(void *buf)
4041 {
4042         struct smb2_transform_hdr *trhdr = buf;
4043
4044         return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
4045 }
4046
4047 static int
4048 decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
4049                  unsigned int buf_data_size, struct page **pages,
4050                  unsigned int npages, unsigned int page_data_size)
4051 {
4052         struct kvec iov[2];
4053         struct smb_rqst rqst = {NULL};
4054         int rc;
4055
4056         iov[0].iov_base = buf;
4057         iov[0].iov_len = sizeof(struct smb2_transform_hdr);
4058         iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr);
4059         iov[1].iov_len = buf_data_size;
4060
4061         rqst.rq_iov = iov;
4062         rqst.rq_nvec = 2;
4063         rqst.rq_pages = pages;
4064         rqst.rq_npages = npages;
4065         rqst.rq_pagesz = PAGE_SIZE;
4066         rqst.rq_tailsz = (page_data_size % PAGE_SIZE) ? : PAGE_SIZE;
4067
4068         rc = crypt_message(server, 1, &rqst, 0);
4069         cifs_dbg(FYI, "Decrypt message returned %d\n", rc);
4070
4071         if (rc)
4072                 return rc;
4073
4074         memmove(buf, iov[1].iov_base, buf_data_size);
4075
4076         server->total_read = buf_data_size + page_data_size;
4077
4078         return rc;
4079 }
4080
4081 static int
4082 read_data_into_pages(struct TCP_Server_Info *server, struct page **pages,
4083                      unsigned int npages, unsigned int len)
4084 {
4085         int i;
4086         int length;
4087
4088         for (i = 0; i < npages; i++) {
4089                 struct page *page = pages[i];
4090                 size_t n;
4091
4092                 n = len;
4093                 if (len >= PAGE_SIZE) {
4094                         /* enough data to fill the page */
4095                         n = PAGE_SIZE;
4096                         len -= n;
4097                 } else {
4098                         zero_user(page, len, PAGE_SIZE - len);
4099                         len = 0;
4100                 }
4101                 length = cifs_read_page_from_socket(server, page, 0, n);
4102                 if (length < 0)
4103                         return length;
4104                 server->total_read += length;
4105         }
4106
4107         return 0;
4108 }
4109
4110 static int
4111 init_read_bvec(struct page **pages, unsigned int npages, unsigned int data_size,
4112                unsigned int cur_off, struct bio_vec **page_vec)
4113 {
4114         struct bio_vec *bvec;
4115         int i;
4116
4117         bvec = kcalloc(npages, sizeof(struct bio_vec), GFP_KERNEL);
4118         if (!bvec)
4119                 return -ENOMEM;
4120
4121         for (i = 0; i < npages; i++) {
4122                 bvec[i].bv_page = pages[i];
4123                 bvec[i].bv_offset = (i == 0) ? cur_off : 0;
4124                 bvec[i].bv_len = min_t(unsigned int, PAGE_SIZE, data_size);
4125                 data_size -= bvec[i].bv_len;
4126         }
4127
4128         if (data_size != 0) {
4129                 cifs_dbg(VFS, "%s: something went wrong\n", __func__);
4130                 kfree(bvec);
4131                 return -EIO;
4132         }
4133
4134         *page_vec = bvec;
4135         return 0;
4136 }
4137
4138 static int
4139 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
4140                  char *buf, unsigned int buf_len, struct page **pages,
4141                  unsigned int npages, unsigned int page_data_size)
4142 {
4143         unsigned int data_offset;
4144         unsigned int data_len;
4145         unsigned int cur_off;
4146         unsigned int cur_page_idx;
4147         unsigned int pad_len;
4148         struct cifs_readdata *rdata = mid->callback_data;
4149         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
4150         struct bio_vec *bvec = NULL;
4151         struct iov_iter iter;
4152         struct kvec iov;
4153         int length;
4154         bool use_rdma_mr = false;
4155
4156         if (shdr->Command != SMB2_READ) {
4157                 cifs_server_dbg(VFS, "only big read responses are supported\n");
4158                 return -ENOTSUPP;
4159         }
4160
4161         if (server->ops->is_session_expired &&
4162             server->ops->is_session_expired(buf)) {
4163                 cifs_reconnect(server);
4164                 return -1;
4165         }
4166
4167         if (server->ops->is_status_pending &&
4168                         server->ops->is_status_pending(buf, server))
4169                 return -1;
4170
4171         /* set up first two iov to get credits */
4172         rdata->iov[0].iov_base = buf;
4173         rdata->iov[0].iov_len = 0;
4174         rdata->iov[1].iov_base = buf;
4175         rdata->iov[1].iov_len =
4176                 min_t(unsigned int, buf_len, server->vals->read_rsp_size);
4177         cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
4178                  rdata->iov[0].iov_base, rdata->iov[0].iov_len);
4179         cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n",
4180                  rdata->iov[1].iov_base, rdata->iov[1].iov_len);
4181
4182         rdata->result = server->ops->map_error(buf, true);
4183         if (rdata->result != 0) {
4184                 cifs_dbg(FYI, "%s: server returned error %d\n",
4185                          __func__, rdata->result);
4186                 /* normal error on read response */
4187                 dequeue_mid(mid, false);
4188                 return 0;
4189         }
4190
4191         data_offset = server->ops->read_data_offset(buf);
4192 #ifdef CONFIG_CIFS_SMB_DIRECT
4193         use_rdma_mr = rdata->mr;
4194 #endif
4195         data_len = server->ops->read_data_length(buf, use_rdma_mr);
4196
4197         if (data_offset < server->vals->read_rsp_size) {
4198                 /*
4199                  * win2k8 sometimes sends an offset of 0 when the read
4200                  * is beyond the EOF. Treat it as if the data starts just after
4201                  * the header.
4202                  */
4203                 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n",
4204                          __func__, data_offset);
4205                 data_offset = server->vals->read_rsp_size;
4206         } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) {
4207                 /* data_offset is beyond the end of smallbuf */
4208                 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n",
4209                          __func__, data_offset);
4210                 rdata->result = -EIO;
4211                 dequeue_mid(mid, rdata->result);
4212                 return 0;
4213         }
4214
4215         pad_len = data_offset - server->vals->read_rsp_size;
4216
4217         if (buf_len <= data_offset) {
4218                 /* read response payload is in pages */
4219                 cur_page_idx = pad_len / PAGE_SIZE;
4220                 cur_off = pad_len % PAGE_SIZE;
4221
4222                 if (cur_page_idx != 0) {
4223                         /* data offset is beyond the 1st page of response */
4224                         cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n",
4225                                  __func__, data_offset);
4226                         rdata->result = -EIO;
4227                         dequeue_mid(mid, rdata->result);
4228                         return 0;
4229                 }
4230
4231                 if (data_len > page_data_size - pad_len) {
4232                         /* data_len is corrupt -- discard frame */
4233                         rdata->result = -EIO;
4234                         dequeue_mid(mid, rdata->result);
4235                         return 0;
4236                 }
4237
4238                 rdata->result = init_read_bvec(pages, npages, page_data_size,
4239                                                cur_off, &bvec);
4240                 if (rdata->result != 0) {
4241                         dequeue_mid(mid, rdata->result);
4242                         return 0;
4243                 }
4244
4245                 iov_iter_bvec(&iter, WRITE, bvec, npages, data_len);
4246         } else if (buf_len >= data_offset + data_len) {
4247                 /* read response payload is in buf */
4248                 WARN_ONCE(npages > 0, "read data can be either in buf or in pages");
4249                 iov.iov_base = buf + data_offset;
4250                 iov.iov_len = data_len;
4251                 iov_iter_kvec(&iter, WRITE, &iov, 1, data_len);
4252         } else {
4253                 /* read response payload cannot be in both buf and pages */
4254                 WARN_ONCE(1, "buf can not contain only a part of read data");
4255                 rdata->result = -EIO;
4256                 dequeue_mid(mid, rdata->result);
4257                 return 0;
4258         }
4259
4260         length = rdata->copy_into_pages(server, rdata, &iter);
4261
4262         kfree(bvec);
4263
4264         if (length < 0)
4265                 return length;
4266
4267         dequeue_mid(mid, false);
4268         return length;
4269 }
4270
4271 struct smb2_decrypt_work {
4272         struct work_struct decrypt;
4273         struct TCP_Server_Info *server;
4274         struct page **ppages;
4275         char *buf;
4276         unsigned int npages;
4277         unsigned int len;
4278 };
4279
4280
4281 static void smb2_decrypt_offload(struct work_struct *work)
4282 {
4283         struct smb2_decrypt_work *dw = container_of(work,
4284                                 struct smb2_decrypt_work, decrypt);
4285         int i, rc;
4286         struct mid_q_entry *mid;
4287
4288         rc = decrypt_raw_data(dw->server, dw->buf, dw->server->vals->read_rsp_size,
4289                               dw->ppages, dw->npages, dw->len);
4290         if (rc) {
4291                 cifs_dbg(VFS, "error decrypting rc=%d\n", rc);
4292                 goto free_pages;
4293         }
4294
4295         dw->server->lstrp = jiffies;
4296         mid = smb2_find_mid(dw->server, dw->buf);
4297         if (mid == NULL)
4298                 cifs_dbg(FYI, "mid not found\n");
4299         else {
4300                 mid->decrypted = true;
4301                 rc = handle_read_data(dw->server, mid, dw->buf,
4302                                       dw->server->vals->read_rsp_size,
4303                                       dw->ppages, dw->npages, dw->len);
4304                 mid->callback(mid);
4305                 cifs_mid_q_entry_release(mid);
4306         }
4307
4308 free_pages:
4309         for (i = dw->npages-1; i >= 0; i--)
4310                 put_page(dw->ppages[i]);
4311
4312         kfree(dw->ppages);
4313         cifs_small_buf_release(dw->buf);
4314         kfree(dw);
4315 }
4316
4317
4318 static int
4319 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid,
4320                        int *num_mids)
4321 {
4322         char *buf = server->smallbuf;
4323         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
4324         unsigned int npages;
4325         struct page **pages;
4326         unsigned int len;
4327         unsigned int buflen = server->pdu_size;
4328         int rc;
4329         int i = 0;
4330         struct smb2_decrypt_work *dw;
4331
4332         *num_mids = 1;
4333         len = min_t(unsigned int, buflen, server->vals->read_rsp_size +
4334                 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1;
4335
4336         rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len);
4337         if (rc < 0)
4338                 return rc;
4339         server->total_read += rc;
4340
4341         len = le32_to_cpu(tr_hdr->OriginalMessageSize) -
4342                 server->vals->read_rsp_size;
4343         npages = DIV_ROUND_UP(len, PAGE_SIZE);
4344
4345         pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
4346         if (!pages) {
4347                 rc = -ENOMEM;
4348                 goto discard_data;
4349         }
4350
4351         for (; i < npages; i++) {
4352                 pages[i] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
4353                 if (!pages[i]) {
4354                         rc = -ENOMEM;
4355                         goto discard_data;
4356                 }
4357         }
4358
4359         /* read read data into pages */
4360         rc = read_data_into_pages(server, pages, npages, len);
4361         if (rc)
4362                 goto free_pages;
4363
4364         rc = cifs_discard_remaining_data(server);
4365         if (rc)
4366                 goto free_pages;
4367
4368         /*
4369          * For large reads, offload to different thread for better performance,
4370          * use more cores decrypting which can be expensive
4371          */
4372
4373         if ((server->min_offload) && (server->in_flight > 1) &&
4374             (server->pdu_size >= server->min_offload)) {
4375                 dw = kmalloc(sizeof(struct smb2_decrypt_work), GFP_KERNEL);
4376                 if (dw == NULL)
4377                         goto non_offloaded_decrypt;
4378
4379                 dw->buf = server->smallbuf;
4380                 server->smallbuf = (char *)cifs_small_buf_get();
4381
4382                 INIT_WORK(&dw->decrypt, smb2_decrypt_offload);
4383
4384                 dw->npages = npages;
4385                 dw->server = server;
4386                 dw->ppages = pages;
4387                 dw->len = len;
4388                 queue_work(decrypt_wq, &dw->decrypt);
4389                 *num_mids = 0; /* worker thread takes care of finding mid */
4390                 return -1;
4391         }
4392
4393 non_offloaded_decrypt:
4394         rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size,
4395                               pages, npages, len);
4396         if (rc)
4397                 goto free_pages;
4398
4399         *mid = smb2_find_mid(server, buf);
4400         if (*mid == NULL)
4401                 cifs_dbg(FYI, "mid not found\n");
4402         else {
4403                 cifs_dbg(FYI, "mid found\n");
4404                 (*mid)->decrypted = true;
4405                 rc = handle_read_data(server, *mid, buf,
4406                                       server->vals->read_rsp_size,
4407                                       pages, npages, len);
4408         }
4409
4410 free_pages:
4411         for (i = i - 1; i >= 0; i--)
4412                 put_page(pages[i]);
4413         kfree(pages);
4414         return rc;
4415 discard_data:
4416         cifs_discard_remaining_data(server);
4417         goto free_pages;
4418 }
4419
4420 static int
4421 receive_encrypted_standard(struct TCP_Server_Info *server,
4422                            struct mid_q_entry **mids, char **bufs,
4423                            int *num_mids)
4424 {
4425         int ret, length;
4426         char *buf = server->smallbuf;
4427         struct smb2_sync_hdr *shdr;
4428         unsigned int pdu_length = server->pdu_size;
4429         unsigned int buf_size;
4430         struct mid_q_entry *mid_entry;
4431         int next_is_large;
4432         char *next_buffer = NULL;
4433
4434         *num_mids = 0;
4435
4436         /* switch to large buffer if too big for a small one */
4437         if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) {
4438                 server->large_buf = true;
4439                 memcpy(server->bigbuf, buf, server->total_read);
4440                 buf = server->bigbuf;
4441         }
4442
4443         /* now read the rest */
4444         length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
4445                                 pdu_length - HEADER_SIZE(server) + 1);
4446         if (length < 0)
4447                 return length;
4448         server->total_read += length;
4449
4450         buf_size = pdu_length - sizeof(struct smb2_transform_hdr);
4451         length = decrypt_raw_data(server, buf, buf_size, NULL, 0, 0);
4452         if (length)
4453                 return length;
4454
4455         next_is_large = server->large_buf;
4456 one_more:
4457         shdr = (struct smb2_sync_hdr *)buf;
4458         if (shdr->NextCommand) {
4459                 if (next_is_large)
4460                         next_buffer = (char *)cifs_buf_get();
4461                 else
4462                         next_buffer = (char *)cifs_small_buf_get();
4463                 memcpy(next_buffer,
4464                        buf + le32_to_cpu(shdr->NextCommand),
4465                        pdu_length - le32_to_cpu(shdr->NextCommand));
4466         }
4467
4468         mid_entry = smb2_find_mid(server, buf);
4469         if (mid_entry == NULL)
4470                 cifs_dbg(FYI, "mid not found\n");
4471         else {
4472                 cifs_dbg(FYI, "mid found\n");
4473                 mid_entry->decrypted = true;
4474                 mid_entry->resp_buf_size = server->pdu_size;
4475         }
4476
4477         if (*num_mids >= MAX_COMPOUND) {
4478                 cifs_server_dbg(VFS, "too many PDUs in compound\n");
4479                 return -1;
4480         }
4481         bufs[*num_mids] = buf;
4482         mids[(*num_mids)++] = mid_entry;
4483
4484         if (mid_entry && mid_entry->handle)
4485                 ret = mid_entry->handle(server, mid_entry);
4486         else
4487                 ret = cifs_handle_standard(server, mid_entry);
4488
4489         if (ret == 0 && shdr->NextCommand) {
4490                 pdu_length -= le32_to_cpu(shdr->NextCommand);
4491                 server->large_buf = next_is_large;
4492                 if (next_is_large)
4493                         server->bigbuf = buf = next_buffer;
4494                 else
4495                         server->smallbuf = buf = next_buffer;
4496                 goto one_more;
4497         } else if (ret != 0) {
4498                 /*
4499                  * ret != 0 here means that we didn't get to handle_mid() thus
4500                  * server->smallbuf and server->bigbuf are still valid. We need
4501                  * to free next_buffer because it is not going to be used
4502                  * anywhere.
4503                  */
4504                 if (next_is_large)
4505                         free_rsp_buf(CIFS_LARGE_BUFFER, next_buffer);
4506                 else
4507                         free_rsp_buf(CIFS_SMALL_BUFFER, next_buffer);
4508         }
4509
4510         return ret;
4511 }
4512
4513 static int
4514 smb3_receive_transform(struct TCP_Server_Info *server,
4515                        struct mid_q_entry **mids, char **bufs, int *num_mids)
4516 {
4517         char *buf = server->smallbuf;
4518         unsigned int pdu_length = server->pdu_size;
4519         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
4520         unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
4521
4522         if (pdu_length < sizeof(struct smb2_transform_hdr) +
4523                                                 sizeof(struct smb2_sync_hdr)) {
4524                 cifs_server_dbg(VFS, "Transform message is too small (%u)\n",
4525                          pdu_length);
4526                 cifs_reconnect(server);
4527                 return -ECONNABORTED;
4528         }
4529
4530         if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) {
4531                 cifs_server_dbg(VFS, "Transform message is broken\n");
4532                 cifs_reconnect(server);
4533                 return -ECONNABORTED;
4534         }
4535
4536         /* TODO: add support for compounds containing READ. */
4537         if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server)) {
4538                 return receive_encrypted_read(server, &mids[0], num_mids);
4539         }
4540
4541         return receive_encrypted_standard(server, mids, bufs, num_mids);
4542 }
4543
4544 int
4545 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid)
4546 {
4547         char *buf = server->large_buf ? server->bigbuf : server->smallbuf;
4548
4549         return handle_read_data(server, mid, buf, server->pdu_size,
4550                                 NULL, 0, 0);
4551 }
4552
4553 static int
4554 smb2_next_header(char *buf)
4555 {
4556         struct smb2_sync_hdr *hdr = (struct smb2_sync_hdr *)buf;
4557         struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf;
4558
4559         if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM)
4560                 return sizeof(struct smb2_transform_hdr) +
4561                   le32_to_cpu(t_hdr->OriginalMessageSize);
4562
4563         return le32_to_cpu(hdr->NextCommand);
4564 }
4565
4566 static int
4567 smb2_make_node(unsigned int xid, struct inode *inode,
4568                struct dentry *dentry, struct cifs_tcon *tcon,
4569                char *full_path, umode_t mode, dev_t dev)
4570 {
4571         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
4572         int rc = -EPERM;
4573         FILE_ALL_INFO *buf = NULL;
4574         struct cifs_io_parms io_parms;
4575         __u32 oplock = 0;
4576         struct cifs_fid fid;
4577         struct cifs_open_parms oparms;
4578         unsigned int bytes_written;
4579         struct win_dev *pdev;
4580         struct kvec iov[2];
4581
4582         /*
4583          * Check if mounted with mount parm 'sfu' mount parm.
4584          * SFU emulation should work with all servers, but only
4585          * supports block and char device (no socket & fifo),
4586          * and was used by default in earlier versions of Windows
4587          */
4588         if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL))
4589                 goto out;
4590
4591         /*
4592          * TODO: Add ability to create instead via reparse point. Windows (e.g.
4593          * their current NFS server) uses this approach to expose special files
4594          * over SMB2/SMB3 and Samba will do this with SMB3.1.1 POSIX Extensions
4595          */
4596
4597         if (!S_ISCHR(mode) && !S_ISBLK(mode))
4598                 goto out;
4599
4600         cifs_dbg(FYI, "sfu compat create special file\n");
4601
4602         buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
4603         if (buf == NULL) {
4604                 rc = -ENOMEM;
4605                 goto out;
4606         }
4607
4608         oparms.tcon = tcon;
4609         oparms.cifs_sb = cifs_sb;
4610         oparms.desired_access = GENERIC_WRITE;
4611         oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR |
4612                                                     CREATE_OPTION_SPECIAL);
4613         oparms.disposition = FILE_CREATE;
4614         oparms.path = full_path;
4615         oparms.fid = &fid;
4616         oparms.reconnect = false;
4617
4618         if (tcon->ses->server->oplocks)
4619                 oplock = REQ_OPLOCK;
4620         else
4621                 oplock = 0;
4622         rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, buf);
4623         if (rc)
4624                 goto out;
4625
4626         /*
4627          * BB Do not bother to decode buf since no local inode yet to put
4628          * timestamps in, but we can reuse it safely.
4629          */
4630
4631         pdev = (struct win_dev *)buf;
4632         io_parms.pid = current->tgid;
4633         io_parms.tcon = tcon;
4634         io_parms.offset = 0;
4635         io_parms.length = sizeof(struct win_dev);
4636         iov[1].iov_base = buf;
4637         iov[1].iov_len = sizeof(struct win_dev);
4638         if (S_ISCHR(mode)) {
4639                 memcpy(pdev->type, "IntxCHR", 8);
4640                 pdev->major = cpu_to_le64(MAJOR(dev));
4641                 pdev->minor = cpu_to_le64(MINOR(dev));
4642                 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
4643                                                         &bytes_written, iov, 1);
4644         } else if (S_ISBLK(mode)) {
4645                 memcpy(pdev->type, "IntxBLK", 8);
4646                 pdev->major = cpu_to_le64(MAJOR(dev));
4647                 pdev->minor = cpu_to_le64(MINOR(dev));
4648                 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
4649                                                         &bytes_written, iov, 1);
4650         }
4651         tcon->ses->server->ops->close(xid, tcon, &fid);
4652         d_drop(dentry);
4653
4654         /* FIXME: add code here to set EAs */
4655 out:
4656         kfree(buf);
4657         return rc;
4658 }
4659
4660
4661 struct smb_version_operations smb20_operations = {
4662         .compare_fids = smb2_compare_fids,
4663         .setup_request = smb2_setup_request,
4664         .setup_async_request = smb2_setup_async_request,
4665         .check_receive = smb2_check_receive,
4666         .add_credits = smb2_add_credits,
4667         .set_credits = smb2_set_credits,
4668         .get_credits_field = smb2_get_credits_field,
4669         .get_credits = smb2_get_credits,
4670         .wait_mtu_credits = cifs_wait_mtu_credits,
4671         .get_next_mid = smb2_get_next_mid,
4672         .revert_current_mid = smb2_revert_current_mid,
4673         .read_data_offset = smb2_read_data_offset,
4674         .read_data_length = smb2_read_data_length,
4675         .map_error = map_smb2_to_linux_error,
4676         .find_mid = smb2_find_mid,
4677         .check_message = smb2_check_message,
4678         .dump_detail = smb2_dump_detail,
4679         .clear_stats = smb2_clear_stats,
4680         .print_stats = smb2_print_stats,
4681         .is_oplock_break = smb2_is_valid_oplock_break,
4682         .handle_cancelled_mid = smb2_handle_cancelled_mid,
4683         .downgrade_oplock = smb2_downgrade_oplock,
4684         .need_neg = smb2_need_neg,
4685         .negotiate = smb2_negotiate,
4686         .negotiate_wsize = smb2_negotiate_wsize,
4687         .negotiate_rsize = smb2_negotiate_rsize,
4688         .sess_setup = SMB2_sess_setup,
4689         .logoff = SMB2_logoff,
4690         .tree_connect = SMB2_tcon,
4691         .tree_disconnect = SMB2_tdis,
4692         .qfs_tcon = smb2_qfs_tcon,
4693         .is_path_accessible = smb2_is_path_accessible,
4694         .can_echo = smb2_can_echo,
4695         .echo = SMB2_echo,
4696         .query_path_info = smb2_query_path_info,
4697         .get_srv_inum = smb2_get_srv_inum,
4698         .query_file_info = smb2_query_file_info,
4699         .set_path_size = smb2_set_path_size,
4700         .set_file_size = smb2_set_file_size,
4701         .set_file_info = smb2_set_file_info,
4702         .set_compression = smb2_set_compression,
4703         .mkdir = smb2_mkdir,
4704         .mkdir_setinfo = smb2_mkdir_setinfo,
4705         .rmdir = smb2_rmdir,
4706         .unlink = smb2_unlink,
4707         .rename = smb2_rename_path,
4708         .create_hardlink = smb2_create_hardlink,
4709         .query_symlink = smb2_query_symlink,
4710         .query_mf_symlink = smb3_query_mf_symlink,
4711         .create_mf_symlink = smb3_create_mf_symlink,
4712         .open = smb2_open_file,
4713         .set_fid = smb2_set_fid,
4714         .close = smb2_close_file,
4715         .flush = smb2_flush_file,
4716         .async_readv = smb2_async_readv,
4717         .async_writev = smb2_async_writev,
4718         .sync_read = smb2_sync_read,
4719         .sync_write = smb2_sync_write,
4720         .query_dir_first = smb2_query_dir_first,
4721         .query_dir_next = smb2_query_dir_next,
4722         .close_dir = smb2_close_dir,
4723         .calc_smb_size = smb2_calc_size,
4724         .is_status_pending = smb2_is_status_pending,
4725         .is_session_expired = smb2_is_session_expired,
4726         .oplock_response = smb2_oplock_response,
4727         .queryfs = smb2_queryfs,
4728         .mand_lock = smb2_mand_lock,
4729         .mand_unlock_range = smb2_unlock_range,
4730         .push_mand_locks = smb2_push_mandatory_locks,
4731         .get_lease_key = smb2_get_lease_key,
4732         .set_lease_key = smb2_set_lease_key,
4733         .new_lease_key = smb2_new_lease_key,
4734         .calc_signature = smb2_calc_signature,
4735         .is_read_op = smb2_is_read_op,
4736         .set_oplock_level = smb2_set_oplock_level,
4737         .create_lease_buf = smb2_create_lease_buf,
4738         .parse_lease_buf = smb2_parse_lease_buf,
4739         .copychunk_range = smb2_copychunk_range,
4740         .wp_retry_size = smb2_wp_retry_size,
4741         .dir_needs_close = smb2_dir_needs_close,
4742         .get_dfs_refer = smb2_get_dfs_refer,
4743         .select_sectype = smb2_select_sectype,
4744 #ifdef CONFIG_CIFS_XATTR
4745         .query_all_EAs = smb2_query_eas,
4746         .set_EA = smb2_set_ea,
4747 #endif /* CIFS_XATTR */
4748         .get_acl = get_smb2_acl,
4749         .get_acl_by_fid = get_smb2_acl_by_fid,
4750         .set_acl = set_smb2_acl,
4751         .next_header = smb2_next_header,
4752         .ioctl_query_info = smb2_ioctl_query_info,
4753         .make_node = smb2_make_node,
4754         .fiemap = smb3_fiemap,
4755         .llseek = smb3_llseek,
4756 };
4757
4758 struct smb_version_operations smb21_operations = {
4759         .compare_fids = smb2_compare_fids,
4760         .setup_request = smb2_setup_request,
4761         .setup_async_request = smb2_setup_async_request,
4762         .check_receive = smb2_check_receive,
4763         .add_credits = smb2_add_credits,
4764         .set_credits = smb2_set_credits,
4765         .get_credits_field = smb2_get_credits_field,
4766         .get_credits = smb2_get_credits,
4767         .wait_mtu_credits = smb2_wait_mtu_credits,
4768         .adjust_credits = smb2_adjust_credits,
4769         .get_next_mid = smb2_get_next_mid,
4770         .revert_current_mid = smb2_revert_current_mid,
4771         .read_data_offset = smb2_read_data_offset,
4772         .read_data_length = smb2_read_data_length,
4773         .map_error = map_smb2_to_linux_error,
4774         .find_mid = smb2_find_mid,
4775         .check_message = smb2_check_message,
4776         .dump_detail = smb2_dump_detail,
4777         .clear_stats = smb2_clear_stats,
4778         .print_stats = smb2_print_stats,
4779         .is_oplock_break = smb2_is_valid_oplock_break,
4780         .handle_cancelled_mid = smb2_handle_cancelled_mid,
4781         .downgrade_oplock = smb2_downgrade_oplock,
4782         .need_neg = smb2_need_neg,
4783         .negotiate = smb2_negotiate,
4784         .negotiate_wsize = smb2_negotiate_wsize,
4785         .negotiate_rsize = smb2_negotiate_rsize,
4786         .sess_setup = SMB2_sess_setup,
4787         .logoff = SMB2_logoff,
4788         .tree_connect = SMB2_tcon,
4789         .tree_disconnect = SMB2_tdis,
4790         .qfs_tcon = smb2_qfs_tcon,
4791         .is_path_accessible = smb2_is_path_accessible,
4792         .can_echo = smb2_can_echo,
4793         .echo = SMB2_echo,
4794         .query_path_info = smb2_query_path_info,
4795         .get_srv_inum = smb2_get_srv_inum,
4796         .query_file_info = smb2_query_file_info,
4797         .set_path_size = smb2_set_path_size,
4798         .set_file_size = smb2_set_file_size,
4799         .set_file_info = smb2_set_file_info,
4800         .set_compression = smb2_set_compression,
4801         .mkdir = smb2_mkdir,
4802         .mkdir_setinfo = smb2_mkdir_setinfo,
4803         .rmdir = smb2_rmdir,
4804         .unlink = smb2_unlink,
4805         .rename = smb2_rename_path,
4806         .create_hardlink = smb2_create_hardlink,
4807         .query_symlink = smb2_query_symlink,
4808         .query_mf_symlink = smb3_query_mf_symlink,
4809         .create_mf_symlink = smb3_create_mf_symlink,
4810         .open = smb2_open_file,
4811         .set_fid = smb2_set_fid,
4812         .close = smb2_close_file,
4813         .flush = smb2_flush_file,
4814         .async_readv = smb2_async_readv,
4815         .async_writev = smb2_async_writev,
4816         .sync_read = smb2_sync_read,
4817         .sync_write = smb2_sync_write,
4818         .query_dir_first = smb2_query_dir_first,
4819         .query_dir_next = smb2_query_dir_next,
4820         .close_dir = smb2_close_dir,
4821         .calc_smb_size = smb2_calc_size,
4822         .is_status_pending = smb2_is_status_pending,
4823         .is_session_expired = smb2_is_session_expired,
4824         .oplock_response = smb2_oplock_response,
4825         .queryfs = smb2_queryfs,
4826         .mand_lock = smb2_mand_lock,
4827         .mand_unlock_range = smb2_unlock_range,
4828         .push_mand_locks = smb2_push_mandatory_locks,
4829         .get_lease_key = smb2_get_lease_key,
4830         .set_lease_key = smb2_set_lease_key,
4831         .new_lease_key = smb2_new_lease_key,
4832         .calc_signature = smb2_calc_signature,
4833         .is_read_op = smb21_is_read_op,
4834         .set_oplock_level = smb21_set_oplock_level,
4835         .create_lease_buf = smb2_create_lease_buf,
4836         .parse_lease_buf = smb2_parse_lease_buf,
4837         .copychunk_range = smb2_copychunk_range,
4838         .wp_retry_size = smb2_wp_retry_size,
4839         .dir_needs_close = smb2_dir_needs_close,
4840         .enum_snapshots = smb3_enum_snapshots,
4841         .notify = smb3_notify,
4842         .get_dfs_refer = smb2_get_dfs_refer,
4843         .select_sectype = smb2_select_sectype,
4844 #ifdef CONFIG_CIFS_XATTR
4845         .query_all_EAs = smb2_query_eas,
4846         .set_EA = smb2_set_ea,
4847 #endif /* CIFS_XATTR */
4848         .get_acl = get_smb2_acl,
4849         .get_acl_by_fid = get_smb2_acl_by_fid,
4850         .set_acl = set_smb2_acl,
4851         .next_header = smb2_next_header,
4852         .ioctl_query_info = smb2_ioctl_query_info,
4853         .make_node = smb2_make_node,
4854         .fiemap = smb3_fiemap,
4855         .llseek = smb3_llseek,
4856 };
4857
4858 struct smb_version_operations smb30_operations = {
4859         .compare_fids = smb2_compare_fids,
4860         .setup_request = smb2_setup_request,
4861         .setup_async_request = smb2_setup_async_request,
4862         .check_receive = smb2_check_receive,
4863         .add_credits = smb2_add_credits,
4864         .set_credits = smb2_set_credits,
4865         .get_credits_field = smb2_get_credits_field,
4866         .get_credits = smb2_get_credits,
4867         .wait_mtu_credits = smb2_wait_mtu_credits,
4868         .adjust_credits = smb2_adjust_credits,
4869         .get_next_mid = smb2_get_next_mid,
4870         .revert_current_mid = smb2_revert_current_mid,
4871         .read_data_offset = smb2_read_data_offset,
4872         .read_data_length = smb2_read_data_length,
4873         .map_error = map_smb2_to_linux_error,
4874         .find_mid = smb2_find_mid,
4875         .check_message = smb2_check_message,
4876         .dump_detail = smb2_dump_detail,
4877         .clear_stats = smb2_clear_stats,
4878         .print_stats = smb2_print_stats,
4879         .dump_share_caps = smb2_dump_share_caps,
4880         .is_oplock_break = smb2_is_valid_oplock_break,
4881         .handle_cancelled_mid = smb2_handle_cancelled_mid,
4882         .downgrade_oplock = smb3_downgrade_oplock,
4883         .need_neg = smb2_need_neg,
4884         .negotiate = smb2_negotiate,
4885         .negotiate_wsize = smb3_negotiate_wsize,
4886         .negotiate_rsize = smb3_negotiate_rsize,
4887         .sess_setup = SMB2_sess_setup,
4888         .logoff = SMB2_logoff,
4889         .tree_connect = SMB2_tcon,
4890         .tree_disconnect = SMB2_tdis,
4891         .qfs_tcon = smb3_qfs_tcon,
4892         .is_path_accessible = smb2_is_path_accessible,
4893         .can_echo = smb2_can_echo,
4894         .echo = SMB2_echo,
4895         .query_path_info = smb2_query_path_info,
4896         .get_srv_inum = smb2_get_srv_inum,
4897         .query_file_info = smb2_query_file_info,
4898         .set_path_size = smb2_set_path_size,
4899         .set_file_size = smb2_set_file_size,
4900         .set_file_info = smb2_set_file_info,
4901         .set_compression = smb2_set_compression,
4902         .mkdir = smb2_mkdir,
4903         .mkdir_setinfo = smb2_mkdir_setinfo,
4904         .rmdir = smb2_rmdir,
4905         .unlink = smb2_unlink,
4906         .rename = smb2_rename_path,
4907         .create_hardlink = smb2_create_hardlink,
4908         .query_symlink = smb2_query_symlink,
4909         .query_mf_symlink = smb3_query_mf_symlink,
4910         .create_mf_symlink = smb3_create_mf_symlink,
4911         .open = smb2_open_file,
4912         .set_fid = smb2_set_fid,
4913         .close = smb2_close_file,
4914         .close_getattr = smb2_close_getattr,
4915         .flush = smb2_flush_file,
4916         .async_readv = smb2_async_readv,
4917         .async_writev = smb2_async_writev,
4918         .sync_read = smb2_sync_read,
4919         .sync_write = smb2_sync_write,
4920         .query_dir_first = smb2_query_dir_first,
4921         .query_dir_next = smb2_query_dir_next,
4922         .close_dir = smb2_close_dir,
4923         .calc_smb_size = smb2_calc_size,
4924         .is_status_pending = smb2_is_status_pending,
4925         .is_session_expired = smb2_is_session_expired,
4926         .oplock_response = smb2_oplock_response,
4927         .queryfs = smb2_queryfs,
4928         .mand_lock = smb2_mand_lock,
4929         .mand_unlock_range = smb2_unlock_range,
4930         .push_mand_locks = smb2_push_mandatory_locks,
4931         .get_lease_key = smb2_get_lease_key,
4932         .set_lease_key = smb2_set_lease_key,
4933         .new_lease_key = smb2_new_lease_key,
4934         .generate_signingkey = generate_smb30signingkey,
4935         .calc_signature = smb3_calc_signature,
4936         .set_integrity  = smb3_set_integrity,
4937         .is_read_op = smb21_is_read_op,
4938         .set_oplock_level = smb3_set_oplock_level,
4939         .create_lease_buf = smb3_create_lease_buf,
4940         .parse_lease_buf = smb3_parse_lease_buf,
4941         .copychunk_range = smb2_copychunk_range,
4942         .duplicate_extents = smb2_duplicate_extents,
4943         .validate_negotiate = smb3_validate_negotiate,
4944         .wp_retry_size = smb2_wp_retry_size,
4945         .dir_needs_close = smb2_dir_needs_close,
4946         .fallocate = smb3_fallocate,
4947         .enum_snapshots = smb3_enum_snapshots,
4948         .notify = smb3_notify,
4949         .init_transform_rq = smb3_init_transform_rq,
4950         .is_transform_hdr = smb3_is_transform_hdr,
4951         .receive_transform = smb3_receive_transform,
4952         .get_dfs_refer = smb2_get_dfs_refer,
4953         .select_sectype = smb2_select_sectype,
4954 #ifdef CONFIG_CIFS_XATTR
4955         .query_all_EAs = smb2_query_eas,
4956         .set_EA = smb2_set_ea,
4957 #endif /* CIFS_XATTR */
4958         .get_acl = get_smb2_acl,
4959         .get_acl_by_fid = get_smb2_acl_by_fid,
4960         .set_acl = set_smb2_acl,
4961         .next_header = smb2_next_header,
4962         .ioctl_query_info = smb2_ioctl_query_info,
4963         .make_node = smb2_make_node,
4964         .fiemap = smb3_fiemap,
4965         .llseek = smb3_llseek,
4966 };
4967
4968 struct smb_version_operations smb311_operations = {
4969         .compare_fids = smb2_compare_fids,
4970         .setup_request = smb2_setup_request,
4971         .setup_async_request = smb2_setup_async_request,
4972         .check_receive = smb2_check_receive,
4973         .add_credits = smb2_add_credits,
4974         .set_credits = smb2_set_credits,
4975         .get_credits_field = smb2_get_credits_field,
4976         .get_credits = smb2_get_credits,
4977         .wait_mtu_credits = smb2_wait_mtu_credits,
4978         .adjust_credits = smb2_adjust_credits,
4979         .get_next_mid = smb2_get_next_mid,
4980         .revert_current_mid = smb2_revert_current_mid,
4981         .read_data_offset = smb2_read_data_offset,
4982         .read_data_length = smb2_read_data_length,
4983         .map_error = map_smb2_to_linux_error,
4984         .find_mid = smb2_find_mid,
4985         .check_message = smb2_check_message,
4986         .dump_detail = smb2_dump_detail,
4987         .clear_stats = smb2_clear_stats,
4988         .print_stats = smb2_print_stats,
4989         .dump_share_caps = smb2_dump_share_caps,
4990         .is_oplock_break = smb2_is_valid_oplock_break,
4991         .handle_cancelled_mid = smb2_handle_cancelled_mid,
4992         .downgrade_oplock = smb3_downgrade_oplock,
4993         .need_neg = smb2_need_neg,
4994         .negotiate = smb2_negotiate,
4995         .negotiate_wsize = smb3_negotiate_wsize,
4996         .negotiate_rsize = smb3_negotiate_rsize,
4997         .sess_setup = SMB2_sess_setup,
4998         .logoff = SMB2_logoff,
4999         .tree_connect = SMB2_tcon,
5000         .tree_disconnect = SMB2_tdis,
5001         .qfs_tcon = smb3_qfs_tcon,
5002         .is_path_accessible = smb2_is_path_accessible,
5003         .can_echo = smb2_can_echo,
5004         .echo = SMB2_echo,
5005         .query_path_info = smb2_query_path_info,
5006         .get_srv_inum = smb2_get_srv_inum,
5007         .query_file_info = smb2_query_file_info,
5008         .set_path_size = smb2_set_path_size,
5009         .set_file_size = smb2_set_file_size,
5010         .set_file_info = smb2_set_file_info,
5011         .set_compression = smb2_set_compression,
5012         .mkdir = smb2_mkdir,
5013         .mkdir_setinfo = smb2_mkdir_setinfo,
5014         .posix_mkdir = smb311_posix_mkdir,
5015         .rmdir = smb2_rmdir,
5016         .unlink = smb2_unlink,
5017         .rename = smb2_rename_path,
5018         .create_hardlink = smb2_create_hardlink,
5019         .query_symlink = smb2_query_symlink,
5020         .query_mf_symlink = smb3_query_mf_symlink,
5021         .create_mf_symlink = smb3_create_mf_symlink,
5022         .open = smb2_open_file,
5023         .set_fid = smb2_set_fid,
5024         .close = smb2_close_file,
5025         .close_getattr = smb2_close_getattr,
5026         .flush = smb2_flush_file,
5027         .async_readv = smb2_async_readv,
5028         .async_writev = smb2_async_writev,
5029         .sync_read = smb2_sync_read,
5030         .sync_write = smb2_sync_write,
5031         .query_dir_first = smb2_query_dir_first,
5032         .query_dir_next = smb2_query_dir_next,
5033         .close_dir = smb2_close_dir,
5034         .calc_smb_size = smb2_calc_size,
5035         .is_status_pending = smb2_is_status_pending,
5036         .is_session_expired = smb2_is_session_expired,
5037         .oplock_response = smb2_oplock_response,
5038         .queryfs = smb311_queryfs,
5039         .mand_lock = smb2_mand_lock,
5040         .mand_unlock_range = smb2_unlock_range,
5041         .push_mand_locks = smb2_push_mandatory_locks,
5042         .get_lease_key = smb2_get_lease_key,
5043         .set_lease_key = smb2_set_lease_key,
5044         .new_lease_key = smb2_new_lease_key,
5045         .generate_signingkey = generate_smb311signingkey,
5046         .calc_signature = smb3_calc_signature,
5047         .set_integrity  = smb3_set_integrity,
5048         .is_read_op = smb21_is_read_op,
5049         .set_oplock_level = smb3_set_oplock_level,
5050         .create_lease_buf = smb3_create_lease_buf,
5051         .parse_lease_buf = smb3_parse_lease_buf,
5052         .copychunk_range = smb2_copychunk_range,
5053         .duplicate_extents = smb2_duplicate_extents,
5054 /*      .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
5055         .wp_retry_size = smb2_wp_retry_size,
5056         .dir_needs_close = smb2_dir_needs_close,
5057         .fallocate = smb3_fallocate,
5058         .enum_snapshots = smb3_enum_snapshots,
5059         .notify = smb3_notify,
5060         .init_transform_rq = smb3_init_transform_rq,
5061         .is_transform_hdr = smb3_is_transform_hdr,
5062         .receive_transform = smb3_receive_transform,
5063         .get_dfs_refer = smb2_get_dfs_refer,
5064         .select_sectype = smb2_select_sectype,
5065 #ifdef CONFIG_CIFS_XATTR
5066         .query_all_EAs = smb2_query_eas,
5067         .set_EA = smb2_set_ea,
5068 #endif /* CIFS_XATTR */
5069         .get_acl = get_smb2_acl,
5070         .get_acl_by_fid = get_smb2_acl_by_fid,
5071         .set_acl = set_smb2_acl,
5072         .next_header = smb2_next_header,
5073         .ioctl_query_info = smb2_ioctl_query_info,
5074         .make_node = smb2_make_node,
5075         .fiemap = smb3_fiemap,
5076         .llseek = smb3_llseek,
5077 };
5078
5079 struct smb_version_values smb20_values = {
5080         .version_string = SMB20_VERSION_STRING,
5081         .protocol_id = SMB20_PROT_ID,
5082         .req_capabilities = 0, /* MBZ */
5083         .large_lock_type = 0,
5084         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5085         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5086         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5087         .header_size = sizeof(struct smb2_sync_hdr),
5088         .header_preamble_size = 0,
5089         .max_header_size = MAX_SMB2_HDR_SIZE,
5090         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5091         .lock_cmd = SMB2_LOCK,
5092         .cap_unix = 0,
5093         .cap_nt_find = SMB2_NT_FIND,
5094         .cap_large_files = SMB2_LARGE_FILES,
5095         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5096         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5097         .create_lease_size = sizeof(struct create_lease),
5098 };
5099
5100 struct smb_version_values smb21_values = {
5101         .version_string = SMB21_VERSION_STRING,
5102         .protocol_id = SMB21_PROT_ID,
5103         .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
5104         .large_lock_type = 0,
5105         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5106         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5107         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5108         .header_size = sizeof(struct smb2_sync_hdr),
5109         .header_preamble_size = 0,
5110         .max_header_size = MAX_SMB2_HDR_SIZE,
5111         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5112         .lock_cmd = SMB2_LOCK,
5113         .cap_unix = 0,
5114         .cap_nt_find = SMB2_NT_FIND,
5115         .cap_large_files = SMB2_LARGE_FILES,
5116         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5117         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5118         .create_lease_size = sizeof(struct create_lease),
5119 };
5120
5121 struct smb_version_values smb3any_values = {
5122         .version_string = SMB3ANY_VERSION_STRING,
5123         .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
5124         .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,
5125         .large_lock_type = 0,
5126         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5127         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5128         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5129         .header_size = sizeof(struct smb2_sync_hdr),
5130         .header_preamble_size = 0,
5131         .max_header_size = MAX_SMB2_HDR_SIZE,
5132         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5133         .lock_cmd = SMB2_LOCK,
5134         .cap_unix = 0,
5135         .cap_nt_find = SMB2_NT_FIND,
5136         .cap_large_files = SMB2_LARGE_FILES,
5137         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5138         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5139         .create_lease_size = sizeof(struct create_lease_v2),
5140 };
5141
5142 struct smb_version_values smbdefault_values = {
5143         .version_string = SMBDEFAULT_VERSION_STRING,
5144         .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
5145         .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,
5146         .large_lock_type = 0,
5147         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5148         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5149         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5150         .header_size = sizeof(struct smb2_sync_hdr),
5151         .header_preamble_size = 0,
5152         .max_header_size = MAX_SMB2_HDR_SIZE,
5153         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5154         .lock_cmd = SMB2_LOCK,
5155         .cap_unix = 0,
5156         .cap_nt_find = SMB2_NT_FIND,
5157         .cap_large_files = SMB2_LARGE_FILES,
5158         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5159         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5160         .create_lease_size = sizeof(struct create_lease_v2),
5161 };
5162
5163 struct smb_version_values smb30_values = {
5164         .version_string = SMB30_VERSION_STRING,
5165         .protocol_id = SMB30_PROT_ID,
5166         .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,
5167         .large_lock_type = 0,
5168         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5169         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5170         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5171         .header_size = sizeof(struct smb2_sync_hdr),
5172         .header_preamble_size = 0,
5173         .max_header_size = MAX_SMB2_HDR_SIZE,
5174         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5175         .lock_cmd = SMB2_LOCK,
5176         .cap_unix = 0,
5177         .cap_nt_find = SMB2_NT_FIND,
5178         .cap_large_files = SMB2_LARGE_FILES,
5179         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5180         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5181         .create_lease_size = sizeof(struct create_lease_v2),
5182 };
5183
5184 struct smb_version_values smb302_values = {
5185         .version_string = SMB302_VERSION_STRING,
5186         .protocol_id = SMB302_PROT_ID,
5187         .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,
5188         .large_lock_type = 0,
5189         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5190         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5191         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5192         .header_size = sizeof(struct smb2_sync_hdr),
5193         .header_preamble_size = 0,
5194         .max_header_size = MAX_SMB2_HDR_SIZE,
5195         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5196         .lock_cmd = SMB2_LOCK,
5197         .cap_unix = 0,
5198         .cap_nt_find = SMB2_NT_FIND,
5199         .cap_large_files = SMB2_LARGE_FILES,
5200         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5201         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5202         .create_lease_size = sizeof(struct create_lease_v2),
5203 };
5204
5205 struct smb_version_values smb311_values = {
5206         .version_string = SMB311_VERSION_STRING,
5207         .protocol_id = SMB311_PROT_ID,
5208         .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,
5209         .large_lock_type = 0,
5210         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5211         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5212         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5213         .header_size = sizeof(struct smb2_sync_hdr),
5214         .header_preamble_size = 0,
5215         .max_header_size = MAX_SMB2_HDR_SIZE,
5216         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5217         .lock_cmd = SMB2_LOCK,
5218         .cap_unix = 0,
5219         .cap_nt_find = SMB2_NT_FIND,
5220         .cap_large_files = SMB2_LARGE_FILES,
5221         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5222         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5223         .create_lease_size = sizeof(struct create_lease_v2),
5224 };