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