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 <linux/fiemap.h>
  16 #include "cifsfs.h"
  17 #include "cifsglob.h"
  18 #include "smb2pdu.h"
  19 #include "smb2proto.h"
  20 #include "cifsproto.h"
  21 #include "cifs_debug.h"
  22 #include "cifs_unicode.h"
  23 #include "smb2status.h"
  24 #include "smb2glob.h"
  25 #include "cifs_ioctl.h"
  26 #include "smbdirect.h"
  27 #include "fs_context.h"
  28
  29 /* Change credits for different ops and return the total number of credits */
  30 static int
  31 change_conf(struct TCP_Server_Info *server)
  32 {
  33         server->credits += server->echo_credits + server->oplock_credits;
  34         server->oplock_credits = server->echo_credits = 0;
  35         switch (server->credits) {
  36         case 0:
  37                 return 0;
  38         case 1:
  39                 server->echoes = false;
  40                 server->oplocks = false;
  41                 break;
  42         case 2:
  43                 server->echoes = true;
  44                 server->oplocks = false;
  45                 server->echo_credits = 1;
  46                 break;
  47         default:
  48                 server->echoes = true;
  49                 if (enable_oplocks) {
  50                         server->oplocks = true;
  51                         server->oplock_credits = 1;
  52                 } else
  53                         server->oplocks = false;
  54
  55                 server->echo_credits = 1;
  56         }
  57         server->credits -= server->echo_credits + server->oplock_credits;
  58         return server->credits + server->echo_credits + server->oplock_credits;
  59 }
  60
  61 static void
  62 smb2_add_credits(struct TCP_Server_Info *server,
  63                  const struct cifs_credits *credits, const int optype)
  64 {
  65         int *val, rc = -1;
  66         int scredits, in_flight;
  67         unsigned int add = credits->value;
  68         unsigned int instance = credits->instance;
  69         bool reconnect_detected = false;
  70         bool reconnect_with_invalid_credits = false;
  71
  72         spin_lock(&server->req_lock);
  73         val = server->ops->get_credits_field(server, optype);
  74
  75         /* eg found case where write overlapping reconnect messed up credits */
  76         if (((optype & CIFS_OP_MASK) == CIFS_NEG_OP) && (*val != 0))
  77                 reconnect_with_invalid_credits = true;
  78
  79         if ((instance == 0) || (instance == server->reconnect_instance))
  80                 *val += add;
  81         else
  82                 reconnect_detected = true;
  83
  84         if (*val > 65000) {
  85                 *val = 65000; /* Don't get near 64K credits, avoid srv bugs */
  86                 pr_warn_once("server overflowed SMB3 credits\n");
  87         }
  88         server->in_flight--;
  89         if (server->in_flight == 0 &&
  90            ((optype & CIFS_OP_MASK) != CIFS_NEG_OP) &&
  91            ((optype & CIFS_OP_MASK) != CIFS_SESS_OP))
  92                 rc = change_conf(server);
  93         /*
  94          * Sometimes server returns 0 credits on oplock break ack - we need to
  95          * rebalance credits in this case.
  96          */
  97         else if (server->in_flight > 0 && server->oplock_credits == 0 &&
  98                  server->oplocks) {
  99                 if (server->credits > 1) {
 100                         server->credits--;
 101                         server->oplock_credits++;
 102                 }
 103         }
 104         scredits = *val;
 105         in_flight = server->in_flight;
 106         spin_unlock(&server->req_lock);
 107         wake_up(&server->request_q);
 108
 109         if (reconnect_detected) {
 110                 trace_smb3_reconnect_detected(server->CurrentMid,
 111                         server->conn_id, server->hostname, scredits, add, in_flight);
 112
 113                 cifs_dbg(FYI, "trying to put %d credits from the old server instance %d\n",
 114                          add, instance);
 115         }
 116
 117         if (reconnect_with_invalid_credits) {
 118                 trace_smb3_reconnect_with_invalid_credits(server->CurrentMid,
 119                         server->conn_id, server->hostname, scredits, add, in_flight);
 120                 cifs_dbg(FYI, "Negotiate operation when server credits is non-zero. Optype: %d, server credits: %d, credits added: %d\n",
 121                          optype, scredits, add);
 122         }
 123
 124         if (server->tcpStatus == CifsNeedReconnect
 125             || server->tcpStatus == CifsExiting)
 126                 return;
 127
 128         switch (rc) {
 129         case -1:
 130                 /* change_conf hasn't been executed */
 131                 break;
 132         case 0:
 133                 cifs_server_dbg(VFS, "Possible client or server bug - zero credits\n");
 134                 break;
 135         case 1:
 136                 cifs_server_dbg(VFS, "disabling echoes and oplocks\n");
 137                 break;
 138         case 2:
 139                 cifs_dbg(FYI, "disabling oplocks\n");
 140                 break;
 141         default:
 142                 /* change_conf rebalanced credits for different types */
 143                 break;
 144         }
 145
 146         trace_smb3_add_credits(server->CurrentMid,
 147                         server->conn_id, server->hostname, scredits, add, in_flight);
 148         cifs_dbg(FYI, "%s: added %u credits total=%d\n", __func__, add, scredits);
 149 }
 150
 151 static void
 152 smb2_set_credits(struct TCP_Server_Info *server, const int val)
 153 {
 154         int scredits, in_flight;
 155
 156         spin_lock(&server->req_lock);
 157         server->credits = val;
 158         if (val == 1)
 159                 server->reconnect_instance++;
 160         scredits = server->credits;
 161         in_flight = server->in_flight;
 162         spin_unlock(&server->req_lock);
 163
 164         trace_smb3_set_credits(server->CurrentMid,
 165                         server->conn_id, server->hostname, scredits, val, in_flight);
 166         cifs_dbg(FYI, "%s: set %u credits\n", __func__, val);
 167
 168         /* don't log while holding the lock */
 169         if (val == 1)
 170                 cifs_dbg(FYI, "set credits to 1 due to smb2 reconnect\n");
 171 }
 172
 173 static int *
 174 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
 175 {
 176         switch (optype) {
 177         case CIFS_ECHO_OP:
 178                 return &server->echo_credits;
 179         case CIFS_OBREAK_OP:
 180                 return &server->oplock_credits;
 181         default:
 182                 return &server->credits;
 183         }
 184 }
 185
 186 static unsigned int
 187 smb2_get_credits(struct mid_q_entry *mid)
 188 {
 189         return mid->credits_received;
 190 }
 191
 192 static int
 193 smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
 194                       unsigned int *num, struct cifs_credits *credits)
 195 {
 196         int rc = 0;
 197         unsigned int scredits, in_flight;
 198
 199         spin_lock(&server->req_lock);
 200         while (1) {
 201                 if (server->credits <= 0) {
 202                         spin_unlock(&server->req_lock);
 203                         cifs_num_waiters_inc(server);
 204                         rc = wait_event_killable(server->request_q,
 205                                 has_credits(server, &server->credits, 1));
 206                         cifs_num_waiters_dec(server);
 207                         if (rc)
 208                                 return rc;
 209                         spin_lock(&server->req_lock);
 210                 } else {
 211                         if (server->tcpStatus == CifsExiting) {
 212                                 spin_unlock(&server->req_lock);
 213                                 return -ENOENT;
 214                         }
 215
 216                         scredits = server->credits;
 217                         /* can deadlock with reopen */
 218                         if (scredits <= 8) {
 219                                 *num = SMB2_MAX_BUFFER_SIZE;
 220                                 credits->value = 0;
 221                                 credits->instance = 0;
 222                                 break;
 223                         }
 224
 225                         /* leave some credits for reopen and other ops */
 226                         scredits -= 8;
 227                         *num = min_t(unsigned int, size,
 228                                      scredits * SMB2_MAX_BUFFER_SIZE);
 229
 230                         credits->value =
 231                                 DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE);
 232                         credits->instance = server->reconnect_instance;
 233                         server->credits -= credits->value;
 234                         server->in_flight++;
 235                         if (server->in_flight > server->max_in_flight)
 236                                 server->max_in_flight = server->in_flight;
 237                         break;
 238                 }
 239         }
 240         scredits = server->credits;
 241         in_flight = server->in_flight;
 242         spin_unlock(&server->req_lock);
 243
 244         trace_smb3_add_credits(server->CurrentMid,
 245                         server->conn_id, server->hostname, scredits, -(credits->value), in_flight);
 246         cifs_dbg(FYI, "%s: removed %u credits total=%d\n",
 247                         __func__, credits->value, scredits);
 248
 249         return rc;
 250 }
 251
 252 static int
 253 smb2_adjust_credits(struct TCP_Server_Info *server,
 254                     struct cifs_credits *credits,
 255                     const unsigned int payload_size)
 256 {
 257         int new_val = DIV_ROUND_UP(payload_size, SMB2_MAX_BUFFER_SIZE);
 258         int scredits, in_flight;
 259
 260         if (!credits->value || credits->value == new_val)
 261                 return 0;
 262
 263         if (credits->value < new_val) {
 264                 trace_smb3_too_many_credits(server->CurrentMid,
 265                                 server->conn_id, server->hostname, 0, credits->value - new_val, 0);
 266                 cifs_server_dbg(VFS, "request has less credits (%d) than required (%d)",
 267                                 credits->value, new_val);
 268
 269                 return -ENOTSUPP;
 270         }
 271
 272         spin_lock(&server->req_lock);
 273
 274         if (server->reconnect_instance != credits->instance) {
 275                 scredits = server->credits;
 276                 in_flight = server->in_flight;
 277                 spin_unlock(&server->req_lock);
 278
 279                 trace_smb3_reconnect_detected(server->CurrentMid,
 280                         server->conn_id, server->hostname, scredits,
 281                         credits->value - new_val, in_flight);
 282                 cifs_server_dbg(VFS, "trying to return %d credits to old session\n",
 283                          credits->value - new_val);
 284                 return -EAGAIN;
 285         }
 286
 287         server->credits += credits->value - new_val;
 288         scredits = server->credits;
 289         in_flight = server->in_flight;
 290         spin_unlock(&server->req_lock);
 291         wake_up(&server->request_q);
 292
 293         trace_smb3_add_credits(server->CurrentMid,
 294                         server->conn_id, server->hostname, scredits,
 295                         credits->value - new_val, in_flight);
 296         cifs_dbg(FYI, "%s: adjust added %u credits total=%d\n",
 297                         __func__, credits->value - new_val, scredits);
 298
 299         credits->value = new_val;
 300
 301         return 0;
 302 }
 303
 304 static __u64
 305 smb2_get_next_mid(struct TCP_Server_Info *server)
 306 {
 307         __u64 mid;
 308         /* for SMB2 we need the current value */
 309         spin_lock(&GlobalMid_Lock);
 310         mid = server->CurrentMid++;
 311         spin_unlock(&GlobalMid_Lock);
 312         return mid;
 313 }
 314
 315 static void
 316 smb2_revert_current_mid(struct TCP_Server_Info *server, const unsigned int val)
 317 {
 318         spin_lock(&GlobalMid_Lock);
 319         if (server->CurrentMid >= val)
 320                 server->CurrentMid -= val;
 321         spin_unlock(&GlobalMid_Lock);
 322 }
 323
 324 static struct mid_q_entry *
 325 __smb2_find_mid(struct TCP_Server_Info *server, char *buf, bool dequeue)
 326 {
 327         struct mid_q_entry *mid;
 328         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
 329         __u64 wire_mid = le64_to_cpu(shdr->MessageId);
 330
 331         if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
 332                 cifs_server_dbg(VFS, "Encrypted frame parsing not supported yet\n");
 333                 return NULL;
 334         }
 335
 336         spin_lock(&GlobalMid_Lock);
 337         list_for_each_entry(mid, &server->pending_mid_q, qhead) {
 338                 if ((mid->mid == wire_mid) &&
 339                     (mid->mid_state == MID_REQUEST_SUBMITTED) &&
 340                     (mid->command == shdr->Command)) {
 341                         kref_get(&mid->refcount);
 342                         if (dequeue) {
 343                                 list_del_init(&mid->qhead);
 344                                 mid->mid_flags |= MID_DELETED;
 345                         }
 346                         spin_unlock(&GlobalMid_Lock);
 347                         return mid;
 348                 }
 349         }
 350         spin_unlock(&GlobalMid_Lock);
 351         return NULL;
 352 }
 353
 354 static struct mid_q_entry *
 355 smb2_find_mid(struct TCP_Server_Info *server, char *buf)
 356 {
 357         return __smb2_find_mid(server, buf, false);
 358 }
 359
 360 static struct mid_q_entry *
 361 smb2_find_dequeue_mid(struct TCP_Server_Info *server, char *buf)
 362 {
 363         return __smb2_find_mid(server, buf, true);
 364 }
 365
 366 static void
 367 smb2_dump_detail(void *buf, struct TCP_Server_Info *server)
 368 {
 369 #ifdef CONFIG_CIFS_DEBUG2
 370         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
 371
 372         cifs_server_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
 373                  shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId,
 374                  shdr->ProcessId);
 375         cifs_server_dbg(VFS, "smb buf %p len %u\n", buf,
 376                  server->ops->calc_smb_size(buf, server));
 377 #endif
 378 }
 379
 380 static bool
 381 smb2_need_neg(struct TCP_Server_Info *server)
 382 {
 383         return server->max_read == 0;
 384 }
 385
 386 static int
 387 smb2_negotiate(const unsigned int xid, struct cifs_ses *ses)
 388 {
 389         int rc;
 390
 391         cifs_ses_server(ses)->CurrentMid = 0;
 392         rc = SMB2_negotiate(xid, ses);
 393         /* BB we probably don't need to retry with modern servers */
 394         if (rc == -EAGAIN)
 395                 rc = -EHOSTDOWN;
 396         return rc;
 397 }
 398
 399 static unsigned int
 400 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
 401 {
 402         struct TCP_Server_Info *server = tcon->ses->server;
 403         unsigned int wsize;
 404
 405         /* start with specified wsize, or default */
 406         wsize = ctx->wsize ? ctx->wsize : CIFS_DEFAULT_IOSIZE;
 407         wsize = min_t(unsigned int, wsize, server->max_write);
 408         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 409                 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
 410
 411         return wsize;
 412 }
 413
 414 static unsigned int
 415 smb3_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
 416 {
 417         struct TCP_Server_Info *server = tcon->ses->server;
 418         unsigned int wsize;
 419
 420         /* start with specified wsize, or default */
 421         wsize = ctx->wsize ? ctx->wsize : SMB3_DEFAULT_IOSIZE;
 422         wsize = min_t(unsigned int, wsize, server->max_write);
 423 #ifdef CONFIG_CIFS_SMB_DIRECT
 424         if (server->rdma) {
 425                 if (server->sign)
 426                         /*
 427                          * Account for SMB2 data transfer packet header and
 428                          * possible encryption header
 429                          */
 430                         wsize = min_t(unsigned int,
 431                                 wsize,
 432                                 server->smbd_conn->max_fragmented_send_size -
 433                                         SMB2_READWRITE_PDU_HEADER_SIZE -
 434                                         sizeof(struct smb2_transform_hdr));
 435                 else
 436                         wsize = min_t(unsigned int,
 437                                 wsize, server->smbd_conn->max_readwrite_size);
 438         }
 439 #endif
 440         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 441                 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
 442
 443         return wsize;
 444 }
 445
 446 static unsigned int
 447 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
 448 {
 449         struct TCP_Server_Info *server = tcon->ses->server;
 450         unsigned int rsize;
 451
 452         /* start with specified rsize, or default */
 453         rsize = ctx->rsize ? ctx->rsize : CIFS_DEFAULT_IOSIZE;
 454         rsize = min_t(unsigned int, rsize, server->max_read);
 455
 456         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 457                 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
 458
 459         return rsize;
 460 }
 461
 462 static unsigned int
 463 smb3_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
 464 {
 465         struct TCP_Server_Info *server = tcon->ses->server;
 466         unsigned int rsize;
 467
 468         /* start with specified rsize, or default */
 469         rsize = ctx->rsize ? ctx->rsize : SMB3_DEFAULT_IOSIZE;
 470         rsize = min_t(unsigned int, rsize, server->max_read);
 471 #ifdef CONFIG_CIFS_SMB_DIRECT
 472         if (server->rdma) {
 473                 if (server->sign)
 474                         /*
 475                          * Account for SMB2 data transfer packet header and
 476                          * possible encryption header
 477                          */
 478                         rsize = min_t(unsigned int,
 479                                 rsize,
 480                                 server->smbd_conn->max_fragmented_recv_size -
 481                                         SMB2_READWRITE_PDU_HEADER_SIZE -
 482                                         sizeof(struct smb2_transform_hdr));
 483                 else
 484                         rsize = min_t(unsigned int,
 485                                 rsize, server->smbd_conn->max_readwrite_size);
 486         }
 487 #endif
 488
 489         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 490                 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
 491
 492         return rsize;
 493 }
 494
 495 static int
 496 parse_server_interfaces(struct network_interface_info_ioctl_rsp *buf,
 497                         size_t buf_len,
 498                         struct cifs_server_iface **iface_list,
 499                         size_t *iface_count)
 500 {
 501         struct network_interface_info_ioctl_rsp *p;
 502         struct sockaddr_in *addr4;
 503         struct sockaddr_in6 *addr6;
 504         struct iface_info_ipv4 *p4;
 505         struct iface_info_ipv6 *p6;
 506         struct cifs_server_iface *info;
 507         ssize_t bytes_left;
 508         size_t next = 0;
 509         int nb_iface = 0;
 510         int rc = 0;
 511
 512         *iface_list = NULL;
 513         *iface_count = 0;
 514
 515         /*
 516          * Fist pass: count and sanity check
 517          */
 518
 519         bytes_left = buf_len;
 520         p = buf;
 521         while (bytes_left >= sizeof(*p)) {
 522                 nb_iface++;
 523                 next = le32_to_cpu(p->Next);
 524                 if (!next) {
 525                         bytes_left -= sizeof(*p);
 526                         break;
 527                 }
 528                 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
 529                 bytes_left -= next;
 530         }
 531
 532         if (!nb_iface) {
 533                 cifs_dbg(VFS, "%s: malformed interface info\n", __func__);
 534                 rc = -EINVAL;
 535                 goto out;
 536         }
 537
 538         /* Azure rounds the buffer size up 8, to a 16 byte boundary */
 539         if ((bytes_left > 8) || p->Next)
 540                 cifs_dbg(VFS, "%s: incomplete interface info\n", __func__);
 541
 542
 543         /*
 544          * Second pass: extract info to internal structure
 545          */
 546
 547         *iface_list = kcalloc(nb_iface, sizeof(**iface_list), GFP_KERNEL);
 548         if (!*iface_list) {
 549                 rc = -ENOMEM;
 550                 goto out;
 551         }
 552
 553         info = *iface_list;
 554         bytes_left = buf_len;
 555         p = buf;
 556         while (bytes_left >= sizeof(*p)) {
 557                 info->speed = le64_to_cpu(p->LinkSpeed);
 558                 info->rdma_capable = le32_to_cpu(p->Capability & RDMA_CAPABLE);
 559                 info->rss_capable = le32_to_cpu(p->Capability & RSS_CAPABLE);
 560
 561                 cifs_dbg(FYI, "%s: adding iface %zu\n", __func__, *iface_count);
 562                 cifs_dbg(FYI, "%s: speed %zu bps\n", __func__, info->speed);
 563                 cifs_dbg(FYI, "%s: capabilities 0x%08x\n", __func__,
 564                          le32_to_cpu(p->Capability));
 565
 566                 switch (p->Family) {
 567                 /*
 568                  * The kernel and wire socket structures have the same
 569                  * layout and use network byte order but make the
 570                  * conversion explicit in case either one changes.
 571                  */
 572                 case INTERNETWORK:
 573                         addr4 = (struct sockaddr_in *)&info->sockaddr;
 574                         p4 = (struct iface_info_ipv4 *)p->Buffer;
 575                         addr4->sin_family = AF_INET;
 576                         memcpy(&addr4->sin_addr, &p4->IPv4Address, 4);
 577
 578                         /* [MS-SMB2] 2.2.32.5.1.1 Clients MUST ignore these */
 579                         addr4->sin_port = cpu_to_be16(CIFS_PORT);
 580
 581                         cifs_dbg(FYI, "%s: ipv4 %pI4\n", __func__,
 582                                  &addr4->sin_addr);
 583                         break;
 584                 case INTERNETWORKV6:
 585                         addr6 = (struct sockaddr_in6 *)&info->sockaddr;
 586                         p6 = (struct iface_info_ipv6 *)p->Buffer;
 587                         addr6->sin6_family = AF_INET6;
 588                         memcpy(&addr6->sin6_addr, &p6->IPv6Address, 16);
 589
 590                         /* [MS-SMB2] 2.2.32.5.1.2 Clients MUST ignore these */
 591                         addr6->sin6_flowinfo = 0;
 592                         addr6->sin6_scope_id = 0;
 593                         addr6->sin6_port = cpu_to_be16(CIFS_PORT);
 594
 595                         cifs_dbg(FYI, "%s: ipv6 %pI6\n", __func__,
 596                                  &addr6->sin6_addr);
 597                         break;
 598                 default:
 599                         cifs_dbg(VFS,
 600                                  "%s: skipping unsupported socket family\n",
 601                                  __func__);
 602                         goto next_iface;
 603                 }
 604
 605                 (*iface_count)++;
 606                 info++;
 607 next_iface:
 608                 next = le32_to_cpu(p->Next);
 609                 if (!next)
 610                         break;
 611                 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
 612                 bytes_left -= next;
 613         }
 614
 615         if (!*iface_count) {
 616                 rc = -EINVAL;
 617                 goto out;
 618         }
 619
 620 out:
 621         if (rc) {
 622                 kfree(*iface_list);
 623                 *iface_count = 0;
 624                 *iface_list = NULL;
 625         }
 626         return rc;
 627 }
 628
 629 static int compare_iface(const void *ia, const void *ib)
 630 {
 631         const struct cifs_server_iface *a = (struct cifs_server_iface *)ia;
 632         const struct cifs_server_iface *b = (struct cifs_server_iface *)ib;
 633
 634         return a->speed == b->speed ? 0 : (a->speed > b->speed ? -1 : 1);
 635 }
 636
 637 static int
 638 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon)
 639 {
 640         int rc;
 641         unsigned int ret_data_len = 0;
 642         struct network_interface_info_ioctl_rsp *out_buf = NULL;
 643         struct cifs_server_iface *iface_list;
 644         size_t iface_count;
 645         struct cifs_ses *ses = tcon->ses;
 646
 647         rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
 648                         FSCTL_QUERY_NETWORK_INTERFACE_INFO, true /* is_fsctl */,
 649                         NULL /* no data input */, 0 /* no data input */,
 650                         CIFSMaxBufSize, (char **)&out_buf, &ret_data_len);
 651         if (rc == -EOPNOTSUPP) {
 652                 cifs_dbg(FYI,
 653                          "server does not support query network interfaces\n");
 654                 goto out;
 655         } else if (rc != 0) {
 656                 cifs_tcon_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
 657                 goto out;
 658         }
 659
 660         rc = parse_server_interfaces(out_buf, ret_data_len,
 661                                      &iface_list, &iface_count);
 662         if (rc)
 663                 goto out;
 664
 665         /* sort interfaces from fastest to slowest */
 666         sort(iface_list, iface_count, sizeof(*iface_list), compare_iface, NULL);
 667
 668         spin_lock(&ses->iface_lock);
 669         kfree(ses->iface_list);
 670         ses->iface_list = iface_list;
 671         ses->iface_count = iface_count;
 672         ses->iface_last_update = jiffies;
 673         spin_unlock(&ses->iface_lock);
 674
 675 out:
 676         kfree(out_buf);
 677         return rc;
 678 }
 679
 680 static void
 681 smb2_close_cached_fid(struct kref *ref)
 682 {
 683         struct cached_fid *cfid = container_of(ref, struct cached_fid,
 684                                                refcount);
 685
 686         if (cfid->is_valid) {
 687                 cifs_dbg(FYI, "clear cached root file handle\n");
 688                 SMB2_close(0, cfid->tcon, cfid->fid->persistent_fid,
 689                            cfid->fid->volatile_fid);
 690                 cfid->is_valid = false;
 691                 cfid->file_all_info_is_valid = false;
 692                 cfid->has_lease = false;
 693         }
 694 }
 695
 696 void close_cached_dir(struct cached_fid *cfid)
 697 {
 698         mutex_lock(&cfid->fid_mutex);
 699         kref_put(&cfid->refcount, smb2_close_cached_fid);
 700         mutex_unlock(&cfid->fid_mutex);
 701 }
 702
 703 void close_cached_dir_lease_locked(struct cached_fid *cfid)
 704 {
 705         if (cfid->has_lease) {
 706                 cfid->has_lease = false;
 707                 kref_put(&cfid->refcount, smb2_close_cached_fid);
 708         }
 709 }
 710
 711 void close_cached_dir_lease(struct cached_fid *cfid)
 712 {
 713         mutex_lock(&cfid->fid_mutex);
 714         close_cached_dir_lease_locked(cfid);
 715         mutex_unlock(&cfid->fid_mutex);
 716 }
 717
 718 void
 719 smb2_cached_lease_break(struct work_struct *work)
 720 {
 721         struct cached_fid *cfid = container_of(work,
 722                                 struct cached_fid, lease_break);
 723
 724         close_cached_dir_lease(cfid);
 725 }
 726
 727 /*
 728  * Open the and cache a directory handle.
 729  * Only supported for the root handle.
 730  */
 731 int open_cached_dir(unsigned int xid, struct cifs_tcon *tcon,
 732                 const char *path,
 733                 struct cifs_sb_info *cifs_sb,
 734                 struct cached_fid **cfid)
 735 {
 736         struct cifs_ses *ses = tcon->ses;
 737         struct TCP_Server_Info *server = ses->server;
 738         struct cifs_open_parms oparms;
 739         struct smb2_create_rsp *o_rsp = NULL;
 740         struct smb2_query_info_rsp *qi_rsp = NULL;
 741         int resp_buftype[2];
 742         struct smb_rqst rqst[2];
 743         struct kvec rsp_iov[2];
 744         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
 745         struct kvec qi_iov[1];
 746         int rc, flags = 0;
 747         __le16 utf16_path = 0; /* Null - since an open of top of share */
 748         u8 oplock = SMB2_OPLOCK_LEVEL_II;
 749         struct cifs_fid *pfid;
 750
 751         if (tcon->nohandlecache)
 752                 return -ENOTSUPP;
 753
 754         if (strlen(path))
 755                 return -ENOTSUPP;
 756
 757         mutex_lock(&tcon->crfid.fid_mutex);
 758         if (tcon->crfid.is_valid) {
 759                 cifs_dbg(FYI, "found a cached root file handle\n");
 760                 *cfid = &tcon->crfid;
 761                 kref_get(&tcon->crfid.refcount);
 762                 mutex_unlock(&tcon->crfid.fid_mutex);
 763                 return 0;
 764         }
 765
 766         /*
 767          * We do not hold the lock for the open because in case
 768          * SMB2_open needs to reconnect, it will end up calling
 769          * cifs_mark_open_files_invalid() which takes the lock again
 770          * thus causing a deadlock
 771          */
 772
 773         mutex_unlock(&tcon->crfid.fid_mutex);
 774
 775         if (smb3_encryption_required(tcon))
 776                 flags |= CIFS_TRANSFORM_REQ;
 777
 778         if (!server->ops->new_lease_key)
 779                 return -EIO;
 780
 781         pfid = tcon->crfid.fid;
 782         server->ops->new_lease_key(pfid);
 783
 784         memset(rqst, 0, sizeof(rqst));
 785         resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER;
 786         memset(rsp_iov, 0, sizeof(rsp_iov));
 787
 788         /* Open */
 789         memset(&open_iov, 0, sizeof(open_iov));
 790         rqst[0].rq_iov = open_iov;
 791         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
 792
 793         oparms.tcon = tcon;
 794         oparms.create_options = cifs_create_options(cifs_sb, 0);
 795         oparms.desired_access = FILE_READ_ATTRIBUTES;
 796         oparms.disposition = FILE_OPEN;
 797         oparms.fid = pfid;
 798         oparms.reconnect = false;
 799
 800         rc = SMB2_open_init(tcon, server,
 801                             &rqst[0], &oplock, &oparms, &utf16_path);
 802         if (rc)
 803                 goto oshr_free;
 804         smb2_set_next_command(tcon, &rqst[0]);
 805
 806         memset(&qi_iov, 0, sizeof(qi_iov));
 807         rqst[1].rq_iov = qi_iov;
 808         rqst[1].rq_nvec = 1;
 809
 810         rc = SMB2_query_info_init(tcon, server,
 811                                   &rqst[1], COMPOUND_FID,
 812                                   COMPOUND_FID, FILE_ALL_INFORMATION,
 813                                   SMB2_O_INFO_FILE, 0,
 814                                   sizeof(struct smb2_file_all_info) +
 815                                   PATH_MAX * 2, 0, NULL);
 816         if (rc)
 817                 goto oshr_free;
 818
 819         smb2_set_related(&rqst[1]);
 820
 821         rc = compound_send_recv(xid, ses, server,
 822                                 flags, 2, rqst,
 823                                 resp_buftype, rsp_iov);
 824         mutex_lock(&tcon->crfid.fid_mutex);
 825
 826         /*
 827          * Now we need to check again as the cached root might have
 828          * been successfully re-opened from a concurrent process
 829          */
 830
 831         if (tcon->crfid.is_valid) {
 832                 /* work was already done */
 833
 834                 /* stash fids for close() later */
 835                 struct cifs_fid fid = {
 836                         .persistent_fid = pfid->persistent_fid,
 837                         .volatile_fid = pfid->volatile_fid,
 838                 };
 839
 840                 /*
 841                  * caller expects this func to set pfid to a valid
 842                  * cached root, so we copy the existing one and get a
 843                  * reference.
 844                  */
 845                 memcpy(pfid, tcon->crfid.fid, sizeof(*pfid));
 846                 kref_get(&tcon->crfid.refcount);
 847
 848                 mutex_unlock(&tcon->crfid.fid_mutex);
 849
 850                 if (rc == 0) {
 851                         /* close extra handle outside of crit sec */
 852                         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 853                 }
 854                 rc = 0;
 855                 goto oshr_free;
 856         }
 857
 858         /* Cached root is still invalid, continue normaly */
 859
 860         if (rc) {
 861                 if (rc == -EREMCHG) {
 862                         tcon->need_reconnect = true;
 863                         pr_warn_once("server share %s deleted\n",
 864                                      tcon->treeName);
 865                 }
 866                 goto oshr_exit;
 867         }
 868
 869         atomic_inc(&tcon->num_remote_opens);
 870
 871         o_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base;
 872         oparms.fid->persistent_fid = o_rsp->PersistentFileId;
 873         oparms.fid->volatile_fid = o_rsp->VolatileFileId;
 874 #ifdef CONFIG_CIFS_DEBUG2
 875         oparms.fid->mid = le64_to_cpu(o_rsp->sync_hdr.MessageId);
 876 #endif /* CIFS_DEBUG2 */
 877
 878         memcpy(tcon->crfid.fid, pfid, sizeof(struct cifs_fid));
 879         tcon->crfid.tcon = tcon;
 880         tcon->crfid.is_valid = true;
 881         kref_init(&tcon->crfid.refcount);
 882
 883         /* BB TBD check to see if oplock level check can be removed below */
 884         if (o_rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE) {
 885                 kref_get(&tcon->crfid.refcount);
 886                 tcon->crfid.has_lease = true;
 887                 smb2_parse_contexts(server, o_rsp,
 888                                 &oparms.fid->epoch,
 889                                     oparms.fid->lease_key, &oplock,
 890                                     NULL, NULL);
 891         } else
 892                 goto oshr_exit;
 893
 894         qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
 895         if (le32_to_cpu(qi_rsp->OutputBufferLength) < sizeof(struct smb2_file_all_info))
 896                 goto oshr_exit;
 897         if (!smb2_validate_and_copy_iov(
 898                                 le16_to_cpu(qi_rsp->OutputBufferOffset),
 899                                 sizeof(struct smb2_file_all_info),
 900                                 &rsp_iov[1], sizeof(struct smb2_file_all_info),
 901                                 (char *)&tcon->crfid.file_all_info))
 902                 tcon->crfid.file_all_info_is_valid = true;
 903
 904 oshr_exit:
 905         mutex_unlock(&tcon->crfid.fid_mutex);
 906 oshr_free:
 907         SMB2_open_free(&rqst[0]);
 908         SMB2_query_info_free(&rqst[1]);
 909         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
 910         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
 911         if (rc == 0)
 912                 *cfid = &tcon->crfid;
 913         return rc;
 914 }
 915
 916 static void
 917 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
 918               struct cifs_sb_info *cifs_sb)
 919 {
 920         int rc;
 921         __le16 srch_path = 0; /* Null - open root of share */
 922         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 923         struct cifs_open_parms oparms;
 924         struct cifs_fid fid;
 925         struct cached_fid *cfid = NULL;
 926
 927         oparms.tcon = tcon;
 928         oparms.desired_access = FILE_READ_ATTRIBUTES;
 929         oparms.disposition = FILE_OPEN;
 930         oparms.create_options = cifs_create_options(cifs_sb, 0);
 931         oparms.fid = &fid;
 932         oparms.reconnect = false;
 933
 934         rc = open_cached_dir(xid, tcon, "", cifs_sb, &cfid);
 935         if (rc == 0)
 936                 memcpy(&fid, cfid->fid, sizeof(struct cifs_fid));
 937         else
 938                 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
 939                                NULL, NULL);
 940         if (rc)
 941                 return;
 942
 943         SMB3_request_interfaces(xid, tcon);
 944
 945         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 946                         FS_ATTRIBUTE_INFORMATION);
 947         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 948                         FS_DEVICE_INFORMATION);
 949         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 950                         FS_VOLUME_INFORMATION);
 951         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 952                         FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
 953         if (cfid == NULL)
 954                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 955         else
 956                 close_cached_dir(cfid);
 957 }
 958
 959 static void
 960 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
 961               struct cifs_sb_info *cifs_sb)
 962 {
 963         int rc;
 964         __le16 srch_path = 0; /* Null - open root of share */
 965         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 966         struct cifs_open_parms oparms;
 967         struct cifs_fid fid;
 968
 969         oparms.tcon = tcon;
 970         oparms.desired_access = FILE_READ_ATTRIBUTES;
 971         oparms.disposition = FILE_OPEN;
 972         oparms.create_options = cifs_create_options(cifs_sb, 0);
 973         oparms.fid = &fid;
 974         oparms.reconnect = false;
 975
 976         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
 977                        NULL, NULL);
 978         if (rc)
 979                 return;
 980
 981         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 982                         FS_ATTRIBUTE_INFORMATION);
 983         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 984                         FS_DEVICE_INFORMATION);
 985         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 986 }
 987
 988 static int
 989 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
 990                         struct cifs_sb_info *cifs_sb, const char *full_path)
 991 {
 992         int rc;
 993         __le16 *utf16_path;
 994         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 995         struct cifs_open_parms oparms;
 996         struct cifs_fid fid;
 997
 998         if ((*full_path == 0) && tcon->crfid.is_valid)
 999                 return 0;
1000
1001         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
1002         if (!utf16_path)
1003                 return -ENOMEM;
1004
1005         oparms.tcon = tcon;
1006         oparms.desired_access = FILE_READ_ATTRIBUTES;
1007         oparms.disposition = FILE_OPEN;
1008         oparms.create_options = cifs_create_options(cifs_sb, 0);
1009         oparms.fid = &fid;
1010         oparms.reconnect = false;
1011
1012         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
1013                        NULL);
1014         if (rc) {
1015                 kfree(utf16_path);
1016                 return rc;
1017         }
1018
1019         rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
1020         kfree(utf16_path);
1021         return rc;
1022 }
1023
1024 static int
1025 smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
1026                   struct cifs_sb_info *cifs_sb, const char *full_path,
1027                   u64 *uniqueid, FILE_ALL_INFO *data)
1028 {
1029         *uniqueid = le64_to_cpu(data->IndexNumber);
1030         return 0;
1031 }
1032
1033 static int
1034 smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
1035                      struct cifs_fid *fid, FILE_ALL_INFO *data)
1036 {
1037         int rc;
1038         struct smb2_file_all_info *smb2_data;
1039
1040         smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
1041                             GFP_KERNEL);
1042         if (smb2_data == NULL)
1043                 return -ENOMEM;
1044
1045         rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid,
1046                              smb2_data);
1047         if (!rc)
1048                 move_smb2_info_to_cifs(data, smb2_data);
1049         kfree(smb2_data);
1050         return rc;
1051 }
1052
1053 #ifdef CONFIG_CIFS_XATTR
1054 static ssize_t
1055 move_smb2_ea_to_cifs(char *dst, size_t dst_size,
1056                      struct smb2_file_full_ea_info *src, size_t src_size,
1057                      const unsigned char *ea_name)
1058 {
1059         int rc = 0;
1060         unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0;
1061         char *name, *value;
1062         size_t buf_size = dst_size;
1063         size_t name_len, value_len, user_name_len;
1064
1065         while (src_size > 0) {
1066                 name = &src->ea_data[0];
1067                 name_len = (size_t)src->ea_name_length;
1068                 value = &src->ea_data[src->ea_name_length + 1];
1069                 value_len = (size_t)le16_to_cpu(src->ea_value_length);
1070
1071                 if (name_len == 0)
1072                         break;
1073
1074                 if (src_size < 8 + name_len + 1 + value_len) {
1075                         cifs_dbg(FYI, "EA entry goes beyond length of list\n");
1076                         rc = -EIO;
1077                         goto out;
1078                 }
1079
1080                 if (ea_name) {
1081                         if (ea_name_len == name_len &&
1082                             memcmp(ea_name, name, name_len) == 0) {
1083                                 rc = value_len;
1084                                 if (dst_size == 0)
1085                                         goto out;
1086                                 if (dst_size < value_len) {
1087                                         rc = -ERANGE;
1088                                         goto out;
1089                                 }
1090                                 memcpy(dst, value, value_len);
1091                                 goto out;
1092                         }
1093                 } else {
1094                         /* 'user.' plus a terminating null */
1095                         user_name_len = 5 + 1 + name_len;
1096
1097                         if (buf_size == 0) {
1098                                 /* skip copy - calc size only */
1099                                 rc += user_name_len;
1100                         } else if (dst_size >= user_name_len) {
1101                                 dst_size -= user_name_len;
1102                                 memcpy(dst, "user.", 5);
1103                                 dst += 5;
1104                                 memcpy(dst, src->ea_data, name_len);
1105                                 dst += name_len;
1106                                 *dst = 0;
1107                                 ++dst;
1108                                 rc += user_name_len;
1109                         } else {
1110                                 /* stop before overrun buffer */
1111                                 rc = -ERANGE;
1112                                 break;
1113                         }
1114                 }
1115
1116                 if (!src->next_entry_offset)
1117                         break;
1118
1119                 if (src_size < le32_to_cpu(src->next_entry_offset)) {
1120                         /* stop before overrun buffer */
1121                         rc = -ERANGE;
1122                         break;
1123                 }
1124                 src_size -= le32_to_cpu(src->next_entry_offset);
1125                 src = (void *)((char *)src +
1126                                le32_to_cpu(src->next_entry_offset));
1127         }
1128
1129         /* didn't find the named attribute */
1130         if (ea_name)
1131                 rc = -ENODATA;
1132
1133 out:
1134         return (ssize_t)rc;
1135 }
1136
1137 static ssize_t
1138 smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
1139                const unsigned char *path, const unsigned char *ea_name,
1140                char *ea_data, size_t buf_size,
1141                struct cifs_sb_info *cifs_sb)
1142 {
1143         int rc;
1144         __le16 *utf16_path;
1145         struct kvec rsp_iov = {NULL, 0};
1146         int buftype = CIFS_NO_BUFFER;
1147         struct smb2_query_info_rsp *rsp;
1148         struct smb2_file_full_ea_info *info = NULL;
1149
1150         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1151         if (!utf16_path)
1152                 return -ENOMEM;
1153
1154         rc = smb2_query_info_compound(xid, tcon, utf16_path,
1155                                       FILE_READ_EA,
1156                                       FILE_FULL_EA_INFORMATION,
1157                                       SMB2_O_INFO_FILE,
1158                                       CIFSMaxBufSize -
1159                                       MAX_SMB2_CREATE_RESPONSE_SIZE -
1160                                       MAX_SMB2_CLOSE_RESPONSE_SIZE,
1161                                       &rsp_iov, &buftype, cifs_sb);
1162         if (rc) {
1163                 /*
1164                  * If ea_name is NULL (listxattr) and there are no EAs,
1165                  * return 0 as it's not an error. Otherwise, the specified
1166                  * ea_name was not found.
1167                  */
1168                 if (!ea_name && rc == -ENODATA)
1169                         rc = 0;
1170                 goto qeas_exit;
1171         }
1172
1173         rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
1174         rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
1175                                le32_to_cpu(rsp->OutputBufferLength),
1176                                &rsp_iov,
1177                                sizeof(struct smb2_file_full_ea_info));
1178         if (rc)
1179                 goto qeas_exit;
1180
1181         info = (struct smb2_file_full_ea_info *)(
1182                         le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
1183         rc = move_smb2_ea_to_cifs(ea_data, buf_size, info,
1184                         le32_to_cpu(rsp->OutputBufferLength), ea_name);
1185
1186  qeas_exit:
1187         kfree(utf16_path);
1188         free_rsp_buf(buftype, rsp_iov.iov_base);
1189         return rc;
1190 }
1191
1192
1193 static int
1194 smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
1195             const char *path, const char *ea_name, const void *ea_value,
1196             const __u16 ea_value_len, const struct nls_table *nls_codepage,
1197             struct cifs_sb_info *cifs_sb)
1198 {
1199         struct cifs_ses *ses = tcon->ses;
1200         struct TCP_Server_Info *server = cifs_pick_channel(ses);
1201         __le16 *utf16_path = NULL;
1202         int ea_name_len = strlen(ea_name);
1203         int flags = CIFS_CP_CREATE_CLOSE_OP;
1204         int len;
1205         struct smb_rqst rqst[3];
1206         int resp_buftype[3];
1207         struct kvec rsp_iov[3];
1208         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
1209         struct cifs_open_parms oparms;
1210         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1211         struct cifs_fid fid;
1212         struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE];
1213         unsigned int size[1];
1214         void *data[1];
1215         struct smb2_file_full_ea_info *ea = NULL;
1216         struct kvec close_iov[1];
1217         struct smb2_query_info_rsp *rsp;
1218         int rc, used_len = 0;
1219
1220         if (smb3_encryption_required(tcon))
1221                 flags |= CIFS_TRANSFORM_REQ;
1222
1223         if (ea_name_len > 255)
1224                 return -EINVAL;
1225
1226         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1227         if (!utf16_path)
1228                 return -ENOMEM;
1229
1230         memset(rqst, 0, sizeof(rqst));
1231         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1232         memset(rsp_iov, 0, sizeof(rsp_iov));
1233
1234         if (ses->server->ops->query_all_EAs) {
1235                 if (!ea_value) {
1236                         rc = ses->server->ops->query_all_EAs(xid, tcon, path,
1237                                                              ea_name, NULL, 0,
1238                                                              cifs_sb);
1239                         if (rc == -ENODATA)
1240                                 goto sea_exit;
1241                 } else {
1242                         /* If we are adding a attribute we should first check
1243                          * if there will be enough space available to store
1244                          * the new EA. If not we should not add it since we
1245                          * would not be able to even read the EAs back.
1246                          */
1247                         rc = smb2_query_info_compound(xid, tcon, utf16_path,
1248                                       FILE_READ_EA,
1249                                       FILE_FULL_EA_INFORMATION,
1250                                       SMB2_O_INFO_FILE,
1251                                       CIFSMaxBufSize -
1252                                       MAX_SMB2_CREATE_RESPONSE_SIZE -
1253                                       MAX_SMB2_CLOSE_RESPONSE_SIZE,
1254                                       &rsp_iov[1], &resp_buftype[1], cifs_sb);
1255                         if (rc == 0) {
1256                                 rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1257                                 used_len = le32_to_cpu(rsp->OutputBufferLength);
1258                         }
1259                         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1260                         resp_buftype[1] = CIFS_NO_BUFFER;
1261                         memset(&rsp_iov[1], 0, sizeof(rsp_iov[1]));
1262                         rc = 0;
1263
1264                         /* Use a fudge factor of 256 bytes in case we collide
1265                          * with a different set_EAs command.
1266                          */
1267                         if(CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE -
1268                            MAX_SMB2_CLOSE_RESPONSE_SIZE - 256 <
1269                            used_len + ea_name_len + ea_value_len + 1) {
1270                                 rc = -ENOSPC;
1271                                 goto sea_exit;
1272                         }
1273                 }
1274         }
1275
1276         /* Open */
1277         memset(&open_iov, 0, sizeof(open_iov));
1278         rqst[0].rq_iov = open_iov;
1279         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1280
1281         memset(&oparms, 0, sizeof(oparms));
1282         oparms.tcon = tcon;
1283         oparms.desired_access = FILE_WRITE_EA;
1284         oparms.disposition = FILE_OPEN;
1285         oparms.create_options = cifs_create_options(cifs_sb, 0);
1286         oparms.fid = &fid;
1287         oparms.reconnect = false;
1288
1289         rc = SMB2_open_init(tcon, server,
1290                             &rqst[0], &oplock, &oparms, utf16_path);
1291         if (rc)
1292                 goto sea_exit;
1293         smb2_set_next_command(tcon, &rqst[0]);
1294
1295
1296         /* Set Info */
1297         memset(&si_iov, 0, sizeof(si_iov));
1298         rqst[1].rq_iov = si_iov;
1299         rqst[1].rq_nvec = 1;
1300
1301         len = sizeof(*ea) + ea_name_len + ea_value_len + 1;
1302         ea = kzalloc(len, GFP_KERNEL);
1303         if (ea == NULL) {
1304                 rc = -ENOMEM;
1305                 goto sea_exit;
1306         }
1307
1308         ea->ea_name_length = ea_name_len;
1309         ea->ea_value_length = cpu_to_le16(ea_value_len);
1310         memcpy(ea->ea_data, ea_name, ea_name_len + 1);
1311         memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len);
1312
1313         size[0] = len;
1314         data[0] = ea;
1315
1316         rc = SMB2_set_info_init(tcon, server,
1317                                 &rqst[1], COMPOUND_FID,
1318                                 COMPOUND_FID, current->tgid,
1319                                 FILE_FULL_EA_INFORMATION,
1320                                 SMB2_O_INFO_FILE, 0, data, size);
1321         smb2_set_next_command(tcon, &rqst[1]);
1322         smb2_set_related(&rqst[1]);
1323
1324
1325         /* Close */
1326         memset(&close_iov, 0, sizeof(close_iov));
1327         rqst[2].rq_iov = close_iov;
1328         rqst[2].rq_nvec = 1;
1329         rc = SMB2_close_init(tcon, server,
1330                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
1331         smb2_set_related(&rqst[2]);
1332
1333         rc = compound_send_recv(xid, ses, server,
1334                                 flags, 3, rqst,
1335                                 resp_buftype, rsp_iov);
1336         /* no need to bump num_remote_opens because handle immediately closed */
1337
1338  sea_exit:
1339         kfree(ea);
1340         kfree(utf16_path);
1341         SMB2_open_free(&rqst[0]);
1342         SMB2_set_info_free(&rqst[1]);
1343         SMB2_close_free(&rqst[2]);
1344         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1345         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1346         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1347         return rc;
1348 }
1349 #endif
1350
1351 static bool
1352 smb2_can_echo(struct TCP_Server_Info *server)
1353 {
1354         return server->echoes;
1355 }
1356
1357 static void
1358 smb2_clear_stats(struct cifs_tcon *tcon)
1359 {
1360         int i;
1361
1362         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
1363                 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
1364                 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
1365         }
1366 }
1367
1368 static void
1369 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
1370 {
1371         seq_puts(m, "\n\tShare Capabilities:");
1372         if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
1373                 seq_puts(m, " DFS,");
1374         if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
1375                 seq_puts(m, " CONTINUOUS AVAILABILITY,");
1376         if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
1377                 seq_puts(m, " SCALEOUT,");
1378         if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
1379                 seq_puts(m, " CLUSTER,");
1380         if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
1381                 seq_puts(m, " ASYMMETRIC,");
1382         if (tcon->capabilities == 0)
1383                 seq_puts(m, " None");
1384         if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
1385                 seq_puts(m, " Aligned,");
1386         if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
1387                 seq_puts(m, " Partition Aligned,");
1388         if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
1389                 seq_puts(m, " SSD,");
1390         if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
1391                 seq_puts(m, " TRIM-support,");
1392
1393         seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
1394         seq_printf(m, "\n\ttid: 0x%x", tcon->tid);
1395         if (tcon->perf_sector_size)
1396                 seq_printf(m, "\tOptimal sector size: 0x%x",
1397                            tcon->perf_sector_size);
1398         seq_printf(m, "\tMaximal Access: 0x%x", tcon->maximal_access);
1399 }
1400
1401 static void
1402 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
1403 {
1404         atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
1405         atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
1406
1407         /*
1408          *  Can't display SMB2_NEGOTIATE, SESSION_SETUP, LOGOFF, CANCEL and ECHO
1409          *  totals (requests sent) since those SMBs are per-session not per tcon
1410          */
1411         seq_printf(m, "\nBytes read: %llu  Bytes written: %llu",
1412                    (long long)(tcon->bytes_read),
1413                    (long long)(tcon->bytes_written));
1414         seq_printf(m, "\nOpen files: %d total (local), %d open on server",
1415                    atomic_read(&tcon->num_local_opens),
1416                    atomic_read(&tcon->num_remote_opens));
1417         seq_printf(m, "\nTreeConnects: %d total %d failed",
1418                    atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
1419                    atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
1420         seq_printf(m, "\nTreeDisconnects: %d total %d failed",
1421                    atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
1422                    atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
1423         seq_printf(m, "\nCreates: %d total %d failed",
1424                    atomic_read(&sent[SMB2_CREATE_HE]),
1425                    atomic_read(&failed[SMB2_CREATE_HE]));
1426         seq_printf(m, "\nCloses: %d total %d failed",
1427                    atomic_read(&sent[SMB2_CLOSE_HE]),
1428                    atomic_read(&failed[SMB2_CLOSE_HE]));
1429         seq_printf(m, "\nFlushes: %d total %d failed",
1430                    atomic_read(&sent[SMB2_FLUSH_HE]),
1431                    atomic_read(&failed[SMB2_FLUSH_HE]));
1432         seq_printf(m, "\nReads: %d total %d failed",
1433                    atomic_read(&sent[SMB2_READ_HE]),
1434                    atomic_read(&failed[SMB2_READ_HE]));
1435         seq_printf(m, "\nWrites: %d total %d failed",
1436                    atomic_read(&sent[SMB2_WRITE_HE]),
1437                    atomic_read(&failed[SMB2_WRITE_HE]));
1438         seq_printf(m, "\nLocks: %d total %d failed",
1439                    atomic_read(&sent[SMB2_LOCK_HE]),
1440                    atomic_read(&failed[SMB2_LOCK_HE]));
1441         seq_printf(m, "\nIOCTLs: %d total %d failed",
1442                    atomic_read(&sent[SMB2_IOCTL_HE]),
1443                    atomic_read(&failed[SMB2_IOCTL_HE]));
1444         seq_printf(m, "\nQueryDirectories: %d total %d failed",
1445                    atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
1446                    atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
1447         seq_printf(m, "\nChangeNotifies: %d total %d failed",
1448                    atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
1449                    atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
1450         seq_printf(m, "\nQueryInfos: %d total %d failed",
1451                    atomic_read(&sent[SMB2_QUERY_INFO_HE]),
1452                    atomic_read(&failed[SMB2_QUERY_INFO_HE]));
1453         seq_printf(m, "\nSetInfos: %d total %d failed",
1454                    atomic_read(&sent[SMB2_SET_INFO_HE]),
1455                    atomic_read(&failed[SMB2_SET_INFO_HE]));
1456         seq_printf(m, "\nOplockBreaks: %d sent %d failed",
1457                    atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
1458                    atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
1459 }
1460
1461 static void
1462 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
1463 {
1464         struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
1465         struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
1466
1467         cfile->fid.persistent_fid = fid->persistent_fid;
1468         cfile->fid.volatile_fid = fid->volatile_fid;
1469         cfile->fid.access = fid->access;
1470 #ifdef CONFIG_CIFS_DEBUG2
1471         cfile->fid.mid = fid->mid;
1472 #endif /* CIFS_DEBUG2 */
1473         server->ops->set_oplock_level(cinode, oplock, fid->epoch,
1474                                       &fid->purge_cache);
1475         cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
1476         memcpy(cfile->fid.create_guid, fid->create_guid, 16);
1477 }
1478
1479 static void
1480 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
1481                 struct cifs_fid *fid)
1482 {
1483         SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1484 }
1485
1486 static void
1487 smb2_close_getattr(const unsigned int xid, struct cifs_tcon *tcon,
1488                    struct cifsFileInfo *cfile)
1489 {
1490         struct smb2_file_network_open_info file_inf;
1491         struct inode *inode;
1492         int rc;
1493
1494         rc = __SMB2_close(xid, tcon, cfile->fid.persistent_fid,
1495                    cfile->fid.volatile_fid, &file_inf);
1496         if (rc)
1497                 return;
1498
1499         inode = d_inode(cfile->dentry);
1500
1501         spin_lock(&inode->i_lock);
1502         CIFS_I(inode)->time = jiffies;
1503
1504         /* Creation time should not need to be updated on close */
1505         if (file_inf.LastWriteTime)
1506                 inode->i_mtime = cifs_NTtimeToUnix(file_inf.LastWriteTime);
1507         if (file_inf.ChangeTime)
1508                 inode->i_ctime = cifs_NTtimeToUnix(file_inf.ChangeTime);
1509         if (file_inf.LastAccessTime)
1510                 inode->i_atime = cifs_NTtimeToUnix(file_inf.LastAccessTime);
1511
1512         /*
1513          * i_blocks is not related to (i_size / i_blksize),
1514          * but instead 512 byte (2**9) size is required for
1515          * calculating num blocks.
1516          */
1517         if (le64_to_cpu(file_inf.AllocationSize) > 4096)
1518                 inode->i_blocks =
1519                         (512 - 1 + le64_to_cpu(file_inf.AllocationSize)) >> 9;
1520
1521         /* End of file and Attributes should not have to be updated on close */
1522         spin_unlock(&inode->i_lock);
1523 }
1524
1525 static int
1526 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
1527                      u64 persistent_fid, u64 volatile_fid,
1528                      struct copychunk_ioctl *pcchunk)
1529 {
1530         int rc;
1531         unsigned int ret_data_len;
1532         struct resume_key_req *res_key;
1533
1534         rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
1535                         FSCTL_SRV_REQUEST_RESUME_KEY, true /* is_fsctl */,
1536                         NULL, 0 /* no input */, CIFSMaxBufSize,
1537                         (char **)&res_key, &ret_data_len);
1538
1539         if (rc) {
1540                 cifs_tcon_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
1541                 goto req_res_key_exit;
1542         }
1543         if (ret_data_len < sizeof(struct resume_key_req)) {
1544                 cifs_tcon_dbg(VFS, "Invalid refcopy resume key length\n");
1545                 rc = -EINVAL;
1546                 goto req_res_key_exit;
1547         }
1548         memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
1549
1550 req_res_key_exit:
1551         kfree(res_key);
1552         return rc;
1553 }
1554
1555 struct iqi_vars {
1556         struct smb_rqst rqst[3];
1557         struct kvec rsp_iov[3];
1558         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
1559         struct kvec qi_iov[1];
1560         struct kvec io_iov[SMB2_IOCTL_IOV_SIZE];
1561         struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE];
1562         struct kvec close_iov[1];
1563 };
1564
1565 static int
1566 smb2_ioctl_query_info(const unsigned int xid,
1567                       struct cifs_tcon *tcon,
1568                       struct cifs_sb_info *cifs_sb,
1569                       __le16 *path, int is_dir,
1570                       unsigned long p)
1571 {
1572         struct iqi_vars *vars;
1573         struct smb_rqst *rqst;
1574         struct kvec *rsp_iov;
1575         struct cifs_ses *ses = tcon->ses;
1576         struct TCP_Server_Info *server = cifs_pick_channel(ses);
1577         char __user *arg = (char __user *)p;
1578         struct smb_query_info qi;
1579         struct smb_query_info __user *pqi;
1580         int rc = 0;
1581         int flags = CIFS_CP_CREATE_CLOSE_OP;
1582         struct smb2_query_info_rsp *qi_rsp = NULL;
1583         struct smb2_ioctl_rsp *io_rsp = NULL;
1584         void *buffer = NULL;
1585         int resp_buftype[3];
1586         struct cifs_open_parms oparms;
1587         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1588         struct cifs_fid fid;
1589         unsigned int size[2];
1590         void *data[2];
1591         int create_options = is_dir ? CREATE_NOT_FILE : CREATE_NOT_DIR;
1592
1593         vars = kzalloc(sizeof(*vars), GFP_ATOMIC);
1594         if (vars == NULL)
1595                 return -ENOMEM;
1596         rqst = &vars->rqst[0];
1597         rsp_iov = &vars->rsp_iov[0];
1598
1599         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1600
1601         if (copy_from_user(&qi, arg, sizeof(struct smb_query_info)))
1602                 goto e_fault;
1603
1604         if (qi.output_buffer_length > 1024) {
1605                 kfree(vars);
1606                 return -EINVAL;
1607         }
1608
1609         if (!ses || !server) {
1610                 kfree(vars);
1611                 return -EIO;
1612         }
1613
1614         if (smb3_encryption_required(tcon))
1615                 flags |= CIFS_TRANSFORM_REQ;
1616
1617         buffer = memdup_user(arg + sizeof(struct smb_query_info),
1618                              qi.output_buffer_length);
1619         if (IS_ERR(buffer)) {
1620                 kfree(vars);
1621                 return PTR_ERR(buffer);
1622         }
1623
1624         /* Open */
1625         rqst[0].rq_iov = &vars->open_iov[0];
1626         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1627
1628         memset(&oparms, 0, sizeof(oparms));
1629         oparms.tcon = tcon;
1630         oparms.disposition = FILE_OPEN;
1631         oparms.create_options = cifs_create_options(cifs_sb, create_options);
1632         oparms.fid = &fid;
1633         oparms.reconnect = false;
1634
1635         if (qi.flags & PASSTHRU_FSCTL) {
1636                 switch (qi.info_type & FSCTL_DEVICE_ACCESS_MASK) {
1637                 case FSCTL_DEVICE_ACCESS_FILE_READ_WRITE_ACCESS:
1638                         oparms.desired_access = FILE_READ_DATA | FILE_WRITE_DATA | FILE_READ_ATTRIBUTES | SYNCHRONIZE;
1639                         break;
1640                 case FSCTL_DEVICE_ACCESS_FILE_ANY_ACCESS:
1641                         oparms.desired_access = GENERIC_ALL;
1642                         break;
1643                 case FSCTL_DEVICE_ACCESS_FILE_READ_ACCESS:
1644                         oparms.desired_access = GENERIC_READ;
1645                         break;
1646                 case FSCTL_DEVICE_ACCESS_FILE_WRITE_ACCESS:
1647                         oparms.desired_access = GENERIC_WRITE;
1648                         break;
1649                 }
1650         } else if (qi.flags & PASSTHRU_SET_INFO) {
1651                 oparms.desired_access = GENERIC_WRITE;
1652         } else {
1653                 oparms.desired_access = FILE_READ_ATTRIBUTES | READ_CONTROL;
1654         }
1655
1656         rc = SMB2_open_init(tcon, server,
1657                             &rqst[0], &oplock, &oparms, path);
1658         if (rc)
1659                 goto iqinf_exit;
1660         smb2_set_next_command(tcon, &rqst[0]);
1661
1662         /* Query */
1663         if (qi.flags & PASSTHRU_FSCTL) {
1664                 /* Can eventually relax perm check since server enforces too */
1665                 if (!capable(CAP_SYS_ADMIN))
1666                         rc = -EPERM;
1667                 else  {
1668                         rqst[1].rq_iov = &vars->io_iov[0];
1669                         rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
1670
1671                         rc = SMB2_ioctl_init(tcon, server,
1672                                              &rqst[1],
1673                                              COMPOUND_FID, COMPOUND_FID,
1674                                              qi.info_type, true, buffer,
1675                                              qi.output_buffer_length,
1676                                              CIFSMaxBufSize -
1677                                              MAX_SMB2_CREATE_RESPONSE_SIZE -
1678                                              MAX_SMB2_CLOSE_RESPONSE_SIZE);
1679                 }
1680         } else if (qi.flags == PASSTHRU_SET_INFO) {
1681                 /* Can eventually relax perm check since server enforces too */
1682                 if (!capable(CAP_SYS_ADMIN))
1683                         rc = -EPERM;
1684                 else  {
1685                         rqst[1].rq_iov = &vars->si_iov[0];
1686                         rqst[1].rq_nvec = 1;
1687
1688                         size[0] = 8;
1689                         data[0] = buffer;
1690
1691                         rc = SMB2_set_info_init(tcon, server,
1692                                         &rqst[1],
1693                                         COMPOUND_FID, COMPOUND_FID,
1694                                         current->tgid,
1695                                         FILE_END_OF_FILE_INFORMATION,
1696                                         SMB2_O_INFO_FILE, 0, data, size);
1697                 }
1698         } else if (qi.flags == PASSTHRU_QUERY_INFO) {
1699                 rqst[1].rq_iov = &vars->qi_iov[0];
1700                 rqst[1].rq_nvec = 1;
1701
1702                 rc = SMB2_query_info_init(tcon, server,
1703                                   &rqst[1], COMPOUND_FID,
1704                                   COMPOUND_FID, qi.file_info_class,
1705                                   qi.info_type, qi.additional_information,
1706                                   qi.input_buffer_length,
1707                                   qi.output_buffer_length, buffer);
1708         } else { /* unknown flags */
1709                 cifs_tcon_dbg(VFS, "Invalid passthru query flags: 0x%x\n",
1710                               qi.flags);
1711                 rc = -EINVAL;
1712         }
1713
1714         if (rc)
1715                 goto iqinf_exit;
1716         smb2_set_next_command(tcon, &rqst[1]);
1717         smb2_set_related(&rqst[1]);
1718
1719         /* Close */
1720         rqst[2].rq_iov = &vars->close_iov[0];
1721         rqst[2].rq_nvec = 1;
1722
1723         rc = SMB2_close_init(tcon, server,
1724                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
1725         if (rc)
1726                 goto iqinf_exit;
1727         smb2_set_related(&rqst[2]);
1728
1729         rc = compound_send_recv(xid, ses, server,
1730                                 flags, 3, rqst,
1731                                 resp_buftype, rsp_iov);
1732         if (rc)
1733                 goto iqinf_exit;
1734
1735         /* No need to bump num_remote_opens since handle immediately closed */
1736         if (qi.flags & PASSTHRU_FSCTL) {
1737                 pqi = (struct smb_query_info __user *)arg;
1738                 io_rsp = (struct smb2_ioctl_rsp *)rsp_iov[1].iov_base;
1739                 if (le32_to_cpu(io_rsp->OutputCount) < qi.input_buffer_length)
1740                         qi.input_buffer_length = le32_to_cpu(io_rsp->OutputCount);
1741                 if (qi.input_buffer_length > 0 &&
1742                     le32_to_cpu(io_rsp->OutputOffset) + qi.input_buffer_length
1743                     > rsp_iov[1].iov_len)
1744                         goto e_fault;
1745
1746                 if (copy_to_user(&pqi->input_buffer_length,
1747                                  &qi.input_buffer_length,
1748                                  sizeof(qi.input_buffer_length)))
1749                         goto e_fault;
1750
1751                 if (copy_to_user((void __user *)pqi + sizeof(struct smb_query_info),
1752                                  (const void *)io_rsp + le32_to_cpu(io_rsp->OutputOffset),
1753                                  qi.input_buffer_length))
1754                         goto e_fault;
1755         } else {
1756                 pqi = (struct smb_query_info __user *)arg;
1757                 qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1758                 if (le32_to_cpu(qi_rsp->OutputBufferLength) < qi.input_buffer_length)
1759                         qi.input_buffer_length = le32_to_cpu(qi_rsp->OutputBufferLength);
1760                 if (copy_to_user(&pqi->input_buffer_length,
1761                                  &qi.input_buffer_length,
1762                                  sizeof(qi.input_buffer_length)))
1763                         goto e_fault;
1764
1765                 if (copy_to_user(pqi + 1, qi_rsp->Buffer,
1766                                  qi.input_buffer_length))
1767                         goto e_fault;
1768         }
1769
1770  iqinf_exit:
1771         kfree(vars);
1772         kfree(buffer);
1773         SMB2_open_free(&rqst[0]);
1774         if (qi.flags & PASSTHRU_FSCTL)
1775                 SMB2_ioctl_free(&rqst[1]);
1776         else
1777                 SMB2_query_info_free(&rqst[1]);
1778
1779         SMB2_close_free(&rqst[2]);
1780         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1781         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1782         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1783         return rc;
1784
1785 e_fault:
1786         rc = -EFAULT;
1787         goto iqinf_exit;
1788 }
1789
1790 static ssize_t
1791 smb2_copychunk_range(const unsigned int xid,
1792                         struct cifsFileInfo *srcfile,
1793                         struct cifsFileInfo *trgtfile, u64 src_off,
1794                         u64 len, u64 dest_off)
1795 {
1796         int rc;
1797         unsigned int ret_data_len;
1798         struct copychunk_ioctl *pcchunk;
1799         struct copychunk_ioctl_rsp *retbuf = NULL;
1800         struct cifs_tcon *tcon;
1801         int chunks_copied = 0;
1802         bool chunk_sizes_updated = false;
1803         ssize_t bytes_written, total_bytes_written = 0;
1804
1805         pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
1806
1807         if (pcchunk == NULL)
1808                 return -ENOMEM;
1809
1810         cifs_dbg(FYI, "%s: about to call request res key\n", __func__);
1811         /* Request a key from the server to identify the source of the copy */
1812         rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
1813                                 srcfile->fid.persistent_fid,
1814                                 srcfile->fid.volatile_fid, pcchunk);
1815
1816         /* Note: request_res_key sets res_key null only if rc !=0 */
1817         if (rc)
1818                 goto cchunk_out;
1819
1820         /* For now array only one chunk long, will make more flexible later */
1821         pcchunk->ChunkCount = cpu_to_le32(1);
1822         pcchunk->Reserved = 0;
1823         pcchunk->Reserved2 = 0;
1824
1825         tcon = tlink_tcon(trgtfile->tlink);
1826
1827         while (len > 0) {
1828                 pcchunk->SourceOffset = cpu_to_le64(src_off);
1829                 pcchunk->TargetOffset = cpu_to_le64(dest_off);
1830                 pcchunk->Length =
1831                         cpu_to_le32(min_t(u32, len, tcon->max_bytes_chunk));
1832
1833                 /* Request server copy to target from src identified by key */
1834                 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1835                         trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
1836                         true /* is_fsctl */, (char *)pcchunk,
1837                         sizeof(struct copychunk_ioctl), CIFSMaxBufSize,
1838                         (char **)&retbuf, &ret_data_len);
1839                 if (rc == 0) {
1840                         if (ret_data_len !=
1841                                         sizeof(struct copychunk_ioctl_rsp)) {
1842                                 cifs_tcon_dbg(VFS, "Invalid cchunk response size\n");
1843                                 rc = -EIO;
1844                                 goto cchunk_out;
1845                         }
1846                         if (retbuf->TotalBytesWritten == 0) {
1847                                 cifs_dbg(FYI, "no bytes copied\n");
1848                                 rc = -EIO;
1849                                 goto cchunk_out;
1850                         }
1851                         /*
1852                          * Check if server claimed to write more than we asked
1853                          */
1854                         if (le32_to_cpu(retbuf->TotalBytesWritten) >
1855                             le32_to_cpu(pcchunk->Length)) {
1856                                 cifs_tcon_dbg(VFS, "Invalid copy chunk response\n");
1857                                 rc = -EIO;
1858                                 goto cchunk_out;
1859                         }
1860                         if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
1861                                 cifs_tcon_dbg(VFS, "Invalid num chunks written\n");
1862                                 rc = -EIO;
1863                                 goto cchunk_out;
1864                         }
1865                         chunks_copied++;
1866
1867                         bytes_written = le32_to_cpu(retbuf->TotalBytesWritten);
1868                         src_off += bytes_written;
1869                         dest_off += bytes_written;
1870                         len -= bytes_written;
1871                         total_bytes_written += bytes_written;
1872
1873                         cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n",
1874                                 le32_to_cpu(retbuf->ChunksWritten),
1875                                 le32_to_cpu(retbuf->ChunkBytesWritten),
1876                                 bytes_written);
1877                 } else if (rc == -EINVAL) {
1878                         if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
1879                                 goto cchunk_out;
1880
1881                         cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
1882                                 le32_to_cpu(retbuf->ChunksWritten),
1883                                 le32_to_cpu(retbuf->ChunkBytesWritten),
1884                                 le32_to_cpu(retbuf->TotalBytesWritten));
1885
1886                         /*
1887                          * Check if this is the first request using these sizes,
1888                          * (ie check if copy succeed once with original sizes
1889                          * and check if the server gave us different sizes after
1890                          * we already updated max sizes on previous request).
1891                          * if not then why is the server returning an error now
1892                          */
1893                         if ((chunks_copied != 0) || chunk_sizes_updated)
1894                                 goto cchunk_out;
1895
1896                         /* Check that server is not asking us to grow size */
1897                         if (le32_to_cpu(retbuf->ChunkBytesWritten) <
1898                                         tcon->max_bytes_chunk)
1899                                 tcon->max_bytes_chunk =
1900                                         le32_to_cpu(retbuf->ChunkBytesWritten);
1901                         else
1902                                 goto cchunk_out; /* server gave us bogus size */
1903
1904                         /* No need to change MaxChunks since already set to 1 */
1905                         chunk_sizes_updated = true;
1906                 } else
1907                         goto cchunk_out;
1908         }
1909
1910 cchunk_out:
1911         kfree(pcchunk);
1912         kfree(retbuf);
1913         if (rc)
1914                 return rc;
1915         else
1916                 return total_bytes_written;
1917 }
1918
1919 static int
1920 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
1921                 struct cifs_fid *fid)
1922 {
1923         return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1924 }
1925
1926 static unsigned int
1927 smb2_read_data_offset(char *buf)
1928 {
1929         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1930
1931         return rsp->DataOffset;
1932 }
1933
1934 static unsigned int
1935 smb2_read_data_length(char *buf, bool in_remaining)
1936 {
1937         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1938
1939         if (in_remaining)
1940                 return le32_to_cpu(rsp->DataRemaining);
1941
1942         return le32_to_cpu(rsp->DataLength);
1943 }
1944
1945
1946 static int
1947 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
1948                struct cifs_io_parms *parms, unsigned int *bytes_read,
1949                char **buf, int *buf_type)
1950 {
1951         parms->persistent_fid = pfid->persistent_fid;
1952         parms->volatile_fid = pfid->volatile_fid;
1953         return SMB2_read(xid, parms, bytes_read, buf, buf_type);
1954 }
1955
1956 static int
1957 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
1958                 struct cifs_io_parms *parms, unsigned int *written,
1959                 struct kvec *iov, unsigned long nr_segs)
1960 {
1961
1962         parms->persistent_fid = pfid->persistent_fid;
1963         parms->volatile_fid = pfid->volatile_fid;
1964         return SMB2_write(xid, parms, written, iov, nr_segs);
1965 }
1966
1967 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
1968 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
1969                 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
1970 {
1971         struct cifsInodeInfo *cifsi;
1972         int rc;
1973
1974         cifsi = CIFS_I(inode);
1975
1976         /* if file already sparse don't bother setting sparse again */
1977         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
1978                 return true; /* already sparse */
1979
1980         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
1981                 return true; /* already not sparse */
1982
1983         /*
1984          * Can't check for sparse support on share the usual way via the
1985          * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
1986          * since Samba server doesn't set the flag on the share, yet
1987          * supports the set sparse FSCTL and returns sparse correctly
1988          * in the file attributes. If we fail setting sparse though we
1989          * mark that server does not support sparse files for this share
1990          * to avoid repeatedly sending the unsupported fsctl to server
1991          * if the file is repeatedly extended.
1992          */
1993         if (tcon->broken_sparse_sup)
1994                 return false;
1995
1996         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1997                         cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
1998                         true /* is_fctl */,
1999                         &setsparse, 1, CIFSMaxBufSize, NULL, NULL);
2000         if (rc) {
2001                 tcon->broken_sparse_sup = true;
2002                 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
2003                 return false;
2004         }
2005
2006         if (setsparse)
2007                 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
2008         else
2009                 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
2010
2011         return true;
2012 }
2013
2014 static int
2015 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
2016                    struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
2017 {
2018         __le64 eof = cpu_to_le64(size);
2019         struct inode *inode;
2020
2021         /*
2022          * If extending file more than one page make sparse. Many Linux fs
2023          * make files sparse by default when extending via ftruncate
2024          */
2025         inode = d_inode(cfile->dentry);
2026
2027         if (!set_alloc && (size > inode->i_size + 8192)) {
2028                 __u8 set_sparse = 1;
2029
2030                 /* whether set sparse succeeds or not, extend the file */
2031                 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
2032         }
2033
2034         return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
2035                             cfile->fid.volatile_fid, cfile->pid, &eof);
2036 }
2037
2038 static int
2039 smb2_duplicate_extents(const unsigned int xid,
2040                         struct cifsFileInfo *srcfile,
2041                         struct cifsFileInfo *trgtfile, u64 src_off,
2042                         u64 len, u64 dest_off)
2043 {
2044         int rc;
2045         unsigned int ret_data_len;
2046         struct inode *inode;
2047         struct duplicate_extents_to_file dup_ext_buf;
2048         struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
2049
2050         /* server fileays advertise duplicate extent support with this flag */
2051         if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
2052              FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
2053                 return -EOPNOTSUPP;
2054
2055         dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
2056         dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
2057         dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
2058         dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
2059         dup_ext_buf.ByteCount = cpu_to_le64(len);
2060         cifs_dbg(FYI, "Duplicate extents: src off %lld dst off %lld len %lld\n",
2061                 src_off, dest_off, len);
2062
2063         inode = d_inode(trgtfile->dentry);
2064         if (inode->i_size < dest_off + len) {
2065                 rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
2066                 if (rc)
2067                         goto duplicate_extents_out;
2068
2069                 /*
2070                  * Although also could set plausible allocation size (i_blocks)
2071                  * here in addition to setting the file size, in reflink
2072                  * it is likely that the target file is sparse. Its allocation
2073                  * size will be queried on next revalidate, but it is important
2074                  * to make sure that file's cached size is updated immediately
2075                  */
2076                 cifs_setsize(inode, dest_off + len);
2077         }
2078         rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
2079                         trgtfile->fid.volatile_fid,
2080                         FSCTL_DUPLICATE_EXTENTS_TO_FILE,
2081                         true /* is_fsctl */,
2082                         (char *)&dup_ext_buf,
2083                         sizeof(struct duplicate_extents_to_file),
2084                         CIFSMaxBufSize, NULL,
2085                         &ret_data_len);
2086
2087         if (ret_data_len > 0)
2088                 cifs_dbg(FYI, "Non-zero response length in duplicate extents\n");
2089
2090 duplicate_extents_out:
2091         return rc;
2092 }
2093
2094 static int
2095 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
2096                    struct cifsFileInfo *cfile)
2097 {
2098         return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
2099                             cfile->fid.volatile_fid);
2100 }
2101
2102 static int
2103 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
2104                    struct cifsFileInfo *cfile)
2105 {
2106         struct fsctl_set_integrity_information_req integr_info;
2107         unsigned int ret_data_len;
2108
2109         integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
2110         integr_info.Flags = 0;
2111         integr_info.Reserved = 0;
2112
2113         return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2114                         cfile->fid.volatile_fid,
2115                         FSCTL_SET_INTEGRITY_INFORMATION,
2116                         true /* is_fsctl */,
2117                         (char *)&integr_info,
2118                         sizeof(struct fsctl_set_integrity_information_req),
2119                         CIFSMaxBufSize, NULL,
2120                         &ret_data_len);
2121
2122 }
2123
2124 /* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */
2125 #define GMT_TOKEN_SIZE 50
2126
2127 #define MIN_SNAPSHOT_ARRAY_SIZE 16 /* See MS-SMB2 section 3.3.5.15.1 */
2128
2129 /*
2130  * Input buffer contains (empty) struct smb_snapshot array with size filled in
2131  * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2
2132  */
2133 static int
2134 smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
2135                    struct cifsFileInfo *cfile, void __user *ioc_buf)
2136 {
2137         char *retbuf = NULL;
2138         unsigned int ret_data_len = 0;
2139         int rc;
2140         u32 max_response_size;
2141         struct smb_snapshot_array snapshot_in;
2142
2143         /*
2144          * On the first query to enumerate the list of snapshots available
2145          * for this volume the buffer begins with 0 (number of snapshots
2146          * which can be returned is zero since at that point we do not know
2147          * how big the buffer needs to be). On the second query,
2148          * it (ret_data_len) is set to number of snapshots so we can
2149          * know to set the maximum response size larger (see below).
2150          */
2151         if (get_user(ret_data_len, (unsigned int __user *)ioc_buf))
2152                 return -EFAULT;
2153
2154         /*
2155          * Note that for snapshot queries that servers like Azure expect that
2156          * the first query be minimal size (and just used to get the number/size
2157          * of previous versions) so response size must be specified as EXACTLY
2158          * sizeof(struct snapshot_array) which is 16 when rounded up to multiple
2159          * of eight bytes.
2160          */
2161         if (ret_data_len == 0)
2162                 max_response_size = MIN_SNAPSHOT_ARRAY_SIZE;
2163         else
2164                 max_response_size = CIFSMaxBufSize;
2165
2166         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2167                         cfile->fid.volatile_fid,
2168                         FSCTL_SRV_ENUMERATE_SNAPSHOTS,
2169                         true /* is_fsctl */,
2170                         NULL, 0 /* no input data */, max_response_size,
2171                         (char **)&retbuf,
2172                         &ret_data_len);
2173         cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n",
2174                         rc, ret_data_len);
2175         if (rc)
2176                 return rc;
2177
2178         if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) {
2179                 /* Fixup buffer */
2180                 if (copy_from_user(&snapshot_in, ioc_buf,
2181                     sizeof(struct smb_snapshot_array))) {
2182                         rc = -EFAULT;
2183                         kfree(retbuf);
2184                         return rc;
2185                 }
2186
2187                 /*
2188                  * Check for min size, ie not large enough to fit even one GMT
2189                  * token (snapshot).  On the first ioctl some users may pass in
2190                  * smaller size (or zero) to simply get the size of the array
2191                  * so the user space caller can allocate sufficient memory
2192                  * and retry the ioctl again with larger array size sufficient
2193                  * to hold all of the snapshot GMT tokens on the second try.
2194                  */
2195                 if (snapshot_in.snapshot_array_size < GMT_TOKEN_SIZE)
2196                         ret_data_len = sizeof(struct smb_snapshot_array);
2197
2198                 /*
2199                  * We return struct SRV_SNAPSHOT_ARRAY, followed by
2200                  * the snapshot array (of 50 byte GMT tokens) each
2201                  * representing an available previous version of the data
2202                  */
2203                 if (ret_data_len > (snapshot_in.snapshot_array_size +
2204                                         sizeof(struct smb_snapshot_array)))
2205                         ret_data_len = snapshot_in.snapshot_array_size +
2206                                         sizeof(struct smb_snapshot_array);
2207
2208                 if (copy_to_user(ioc_buf, retbuf, ret_data_len))
2209                         rc = -EFAULT;
2210         }
2211
2212         kfree(retbuf);
2213         return rc;
2214 }
2215
2216
2217
2218 static int
2219 smb3_notify(const unsigned int xid, struct file *pfile,
2220             void __user *ioc_buf)
2221 {
2222         struct smb3_notify notify;
2223         struct dentry *dentry = pfile->f_path.dentry;
2224         struct inode *inode = file_inode(pfile);
2225         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2226         struct cifs_open_parms oparms;
2227         struct cifs_fid fid;
2228         struct cifs_tcon *tcon;
2229         const unsigned char *path;
2230         void *page = alloc_dentry_path();
2231         __le16 *utf16_path = NULL;
2232         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2233         int rc = 0;
2234
2235         path = build_path_from_dentry(dentry, page);
2236         if (IS_ERR(path)) {
2237                 rc = PTR_ERR(path);
2238                 goto notify_exit;
2239         }
2240
2241         utf16_path = cifs_convert_path_to_utf16(path + 1, cifs_sb);
2242         if (utf16_path == NULL) {
2243                 rc = -ENOMEM;
2244                 goto notify_exit;
2245         }
2246
2247         if (copy_from_user(&notify, ioc_buf, sizeof(struct smb3_notify))) {
2248                 rc = -EFAULT;
2249                 goto notify_exit;
2250         }
2251
2252         tcon = cifs_sb_master_tcon(cifs_sb);
2253         oparms.tcon = tcon;
2254         oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
2255         oparms.disposition = FILE_OPEN;
2256         oparms.create_options = cifs_create_options(cifs_sb, 0);
2257         oparms.fid = &fid;
2258         oparms.reconnect = false;
2259
2260         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
2261                        NULL);
2262         if (rc)
2263                 goto notify_exit;
2264
2265         rc = SMB2_change_notify(xid, tcon, fid.persistent_fid, fid.volatile_fid,
2266                                 notify.watch_tree, notify.completion_filter);
2267
2268         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2269
2270         cifs_dbg(FYI, "change notify for path %s rc %d\n", path, rc);
2271
2272 notify_exit:
2273         free_dentry_path(page);
2274         kfree(utf16_path);
2275         return rc;
2276 }
2277
2278 static int
2279 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
2280                      const char *path, struct cifs_sb_info *cifs_sb,
2281                      struct cifs_fid *fid, __u16 search_flags,
2282                      struct cifs_search_info *srch_inf)
2283 {
2284         __le16 *utf16_path;
2285         struct smb_rqst rqst[2];
2286         struct kvec rsp_iov[2];
2287         int resp_buftype[2];
2288         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2289         struct kvec qd_iov[SMB2_QUERY_DIRECTORY_IOV_SIZE];
2290         int rc, flags = 0;
2291         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2292         struct cifs_open_parms oparms;
2293         struct smb2_query_directory_rsp *qd_rsp = NULL;
2294         struct smb2_create_rsp *op_rsp = NULL;
2295         struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
2296
2297         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2298         if (!utf16_path)
2299                 return -ENOMEM;
2300
2301         if (smb3_encryption_required(tcon))
2302                 flags |= CIFS_TRANSFORM_REQ;
2303
2304         memset(rqst, 0, sizeof(rqst));
2305         resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER;
2306         memset(rsp_iov, 0, sizeof(rsp_iov));
2307
2308         /* Open */
2309         memset(&open_iov, 0, sizeof(open_iov));
2310         rqst[0].rq_iov = open_iov;
2311         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2312
2313         oparms.tcon = tcon;
2314         oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
2315         oparms.disposition = FILE_OPEN;
2316         oparms.create_options = cifs_create_options(cifs_sb, 0);
2317         oparms.fid = fid;
2318         oparms.reconnect = false;
2319
2320         rc = SMB2_open_init(tcon, server,
2321                             &rqst[0], &oplock, &oparms, utf16_path);
2322         if (rc)
2323                 goto qdf_free;
2324         smb2_set_next_command(tcon, &rqst[0]);
2325
2326         /* Query directory */
2327         srch_inf->entries_in_buffer = 0;
2328         srch_inf->index_of_last_entry = 2;
2329
2330         memset(&qd_iov, 0, sizeof(qd_iov));
2331         rqst[1].rq_iov = qd_iov;
2332         rqst[1].rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE;
2333
2334         rc = SMB2_query_directory_init(xid, tcon, server,
2335                                        &rqst[1],
2336                                        COMPOUND_FID, COMPOUND_FID,
2337                                        0, srch_inf->info_level);
2338         if (rc)
2339                 goto qdf_free;
2340
2341         smb2_set_related(&rqst[1]);
2342
2343         rc = compound_send_recv(xid, tcon->ses, server,
2344                                 flags, 2, rqst,
2345                                 resp_buftype, rsp_iov);
2346
2347         /* If the open failed there is nothing to do */
2348         op_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base;
2349         if (op_rsp == NULL || op_rsp->sync_hdr.Status != STATUS_SUCCESS) {
2350                 cifs_dbg(FYI, "query_dir_first: open failed rc=%d\n", rc);
2351                 goto qdf_free;
2352         }
2353         fid->persistent_fid = op_rsp->PersistentFileId;
2354         fid->volatile_fid = op_rsp->VolatileFileId;
2355
2356         /* Anything else than ENODATA means a genuine error */
2357         if (rc && rc != -ENODATA) {
2358                 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2359                 cifs_dbg(FYI, "query_dir_first: query directory failed rc=%d\n", rc);
2360                 trace_smb3_query_dir_err(xid, fid->persistent_fid,
2361                                          tcon->tid, tcon->ses->Suid, 0, 0, rc);
2362                 goto qdf_free;
2363         }
2364
2365         atomic_inc(&tcon->num_remote_opens);
2366
2367         qd_rsp = (struct smb2_query_directory_rsp *)rsp_iov[1].iov_base;
2368         if (qd_rsp->sync_hdr.Status == STATUS_NO_MORE_FILES) {
2369                 trace_smb3_query_dir_done(xid, fid->persistent_fid,
2370                                           tcon->tid, tcon->ses->Suid, 0, 0);
2371                 srch_inf->endOfSearch = true;
2372                 rc = 0;
2373                 goto qdf_free;
2374         }
2375
2376         rc = smb2_parse_query_directory(tcon, &rsp_iov[1], resp_buftype[1],
2377                                         srch_inf);
2378         if (rc) {
2379                 trace_smb3_query_dir_err(xid, fid->persistent_fid, tcon->tid,
2380                         tcon->ses->Suid, 0, 0, rc);
2381                 goto qdf_free;
2382         }
2383         resp_buftype[1] = CIFS_NO_BUFFER;
2384
2385         trace_smb3_query_dir_done(xid, fid->persistent_fid, tcon->tid,
2386                         tcon->ses->Suid, 0, srch_inf->entries_in_buffer);
2387
2388  qdf_free:
2389         kfree(utf16_path);
2390         SMB2_open_free(&rqst[0]);
2391         SMB2_query_directory_free(&rqst[1]);
2392         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2393         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2394         return rc;
2395 }
2396
2397 static int
2398 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
2399                     struct cifs_fid *fid, __u16 search_flags,
2400                     struct cifs_search_info *srch_inf)
2401 {
2402         return SMB2_query_directory(xid, tcon, fid->persistent_fid,
2403                                     fid->volatile_fid, 0, srch_inf);
2404 }
2405
2406 static int
2407 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
2408                struct cifs_fid *fid)
2409 {
2410         return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2411 }
2412
2413 /*
2414  * If we negotiate SMB2 protocol and get STATUS_PENDING - update
2415  * the number of credits and return true. Otherwise - return false.
2416  */
2417 static bool
2418 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server)
2419 {
2420         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
2421         int scredits, in_flight;
2422
2423         if (shdr->Status != STATUS_PENDING)
2424                 return false;
2425
2426         if (shdr->CreditRequest) {
2427                 spin_lock(&server->req_lock);
2428                 server->credits += le16_to_cpu(shdr->CreditRequest);
2429                 scredits = server->credits;
2430                 in_flight = server->in_flight;
2431                 spin_unlock(&server->req_lock);
2432                 wake_up(&server->request_q);
2433
2434                 trace_smb3_add_credits(server->CurrentMid,
2435                                 server->conn_id, server->hostname, scredits,
2436                                 le16_to_cpu(shdr->CreditRequest), in_flight);
2437                 cifs_dbg(FYI, "%s: status pending add %u credits total=%d\n",
2438                                 __func__, le16_to_cpu(shdr->CreditRequest), scredits);
2439         }
2440
2441         return true;
2442 }
2443
2444 static bool
2445 smb2_is_session_expired(char *buf)
2446 {
2447         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
2448
2449         if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED &&
2450             shdr->Status != STATUS_USER_SESSION_DELETED)
2451                 return false;
2452
2453         trace_smb3_ses_expired(shdr->TreeId, shdr->SessionId,
2454                                le16_to_cpu(shdr->Command),
2455                                le64_to_cpu(shdr->MessageId));
2456         cifs_dbg(FYI, "Session expired or deleted\n");
2457
2458         return true;
2459 }
2460
2461 static bool
2462 smb2_is_status_io_timeout(char *buf)
2463 {
2464         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
2465
2466         if (shdr->Status == STATUS_IO_TIMEOUT)
2467                 return true;
2468         else
2469                 return false;
2470 }
2471
2472 static void
2473 smb2_is_network_name_deleted(char *buf, struct TCP_Server_Info *server)
2474 {
2475         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
2476         struct list_head *tmp, *tmp1;
2477         struct cifs_ses *ses;
2478         struct cifs_tcon *tcon;
2479
2480         if (shdr->Status != STATUS_NETWORK_NAME_DELETED)
2481                 return;
2482
2483         spin_lock(&cifs_tcp_ses_lock);
2484         list_for_each(tmp, &server->smb_ses_list) {
2485                 ses = list_entry(tmp, struct cifs_ses, smb_ses_list);
2486                 list_for_each(tmp1, &ses->tcon_list) {
2487                         tcon = list_entry(tmp1, struct cifs_tcon, tcon_list);
2488                         if (tcon->tid == shdr->TreeId) {
2489                                 tcon->need_reconnect = true;
2490                                 spin_unlock(&cifs_tcp_ses_lock);
2491                                 pr_warn_once("Server share %s deleted.\n",
2492                                              tcon->treeName);
2493                                 return;
2494                         }
2495                 }
2496         }
2497         spin_unlock(&cifs_tcp_ses_lock);
2498 }
2499
2500 static int
2501 smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
2502                      struct cifsInodeInfo *cinode)
2503 {
2504         if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
2505                 return SMB2_lease_break(0, tcon, cinode->lease_key,
2506                                         smb2_get_lease_state(cinode));
2507
2508         return SMB2_oplock_break(0, tcon, fid->persistent_fid,
2509                                  fid->volatile_fid,
2510                                  CIFS_CACHE_READ(cinode) ? 1 : 0);
2511 }
2512
2513 void
2514 smb2_set_related(struct smb_rqst *rqst)
2515 {
2516         struct smb2_sync_hdr *shdr;
2517
2518         shdr = (struct smb2_sync_hdr *)(rqst->rq_iov[0].iov_base);
2519         if (shdr == NULL) {
2520                 cifs_dbg(FYI, "shdr NULL in smb2_set_related\n");
2521                 return;
2522         }
2523         shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
2524 }
2525
2526 char smb2_padding[7] = {0, 0, 0, 0, 0, 0, 0};
2527
2528 void
2529 smb2_set_next_command(struct cifs_tcon *tcon, struct smb_rqst *rqst)
2530 {
2531         struct smb2_sync_hdr *shdr;
2532         struct cifs_ses *ses = tcon->ses;
2533         struct TCP_Server_Info *server = ses->server;
2534         unsigned long len = smb_rqst_len(server, rqst);
2535         int i, num_padding;
2536
2537         shdr = (struct smb2_sync_hdr *)(rqst->rq_iov[0].iov_base);
2538         if (shdr == NULL) {
2539                 cifs_dbg(FYI, "shdr NULL in smb2_set_next_command\n");
2540                 return;
2541         }
2542
2543         /* SMB headers in a compound are 8 byte aligned. */
2544
2545         /* No padding needed */
2546         if (!(len & 7))
2547                 goto finished;
2548
2549         num_padding = 8 - (len & 7);
2550         if (!smb3_encryption_required(tcon)) {
2551                 /*
2552                  * If we do not have encryption then we can just add an extra
2553                  * iov for the padding.
2554                  */
2555                 rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding;
2556                 rqst->rq_iov[rqst->rq_nvec].iov_len = num_padding;
2557                 rqst->rq_nvec++;
2558                 len += num_padding;
2559         } else {
2560                 /*
2561                  * We can not add a small padding iov for the encryption case
2562                  * because the encryption framework can not handle the padding
2563                  * iovs.
2564                  * We have to flatten this into a single buffer and add
2565                  * the padding to it.
2566                  */
2567                 for (i = 1; i < rqst->rq_nvec; i++) {
2568                         memcpy(rqst->rq_iov[0].iov_base +
2569                                rqst->rq_iov[0].iov_len,
2570                                rqst->rq_iov[i].iov_base,
2571                                rqst->rq_iov[i].iov_len);
2572                         rqst->rq_iov[0].iov_len += rqst->rq_iov[i].iov_len;
2573                 }
2574                 memset(rqst->rq_iov[0].iov_base + rqst->rq_iov[0].iov_len,
2575                        0, num_padding);
2576                 rqst->rq_iov[0].iov_len += num_padding;
2577                 len += num_padding;
2578                 rqst->rq_nvec = 1;
2579         }
2580
2581  finished:
2582         shdr->NextCommand = cpu_to_le32(len);
2583 }
2584
2585 /*
2586  * Passes the query info response back to the caller on success.
2587  * Caller need to free this with free_rsp_buf().
2588  */
2589 int
2590 smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon,
2591                          __le16 *utf16_path, u32 desired_access,
2592                          u32 class, u32 type, u32 output_len,
2593                          struct kvec *rsp, int *buftype,
2594                          struct cifs_sb_info *cifs_sb)
2595 {
2596         struct cifs_ses *ses = tcon->ses;
2597         struct TCP_Server_Info *server = cifs_pick_channel(ses);
2598         int flags = CIFS_CP_CREATE_CLOSE_OP;
2599         struct smb_rqst rqst[3];
2600         int resp_buftype[3];
2601         struct kvec rsp_iov[3];
2602         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2603         struct kvec qi_iov[1];
2604         struct kvec close_iov[1];
2605         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2606         struct cifs_open_parms oparms;
2607         struct cifs_fid fid;
2608         int rc;
2609
2610         if (smb3_encryption_required(tcon))
2611                 flags |= CIFS_TRANSFORM_REQ;
2612
2613         memset(rqst, 0, sizeof(rqst));
2614         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
2615         memset(rsp_iov, 0, sizeof(rsp_iov));
2616
2617         memset(&open_iov, 0, sizeof(open_iov));
2618         rqst[0].rq_iov = open_iov;
2619         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2620
2621         oparms.tcon = tcon;
2622         oparms.desired_access = desired_access;
2623         oparms.disposition = FILE_OPEN;
2624         oparms.create_options = cifs_create_options(cifs_sb, 0);
2625         oparms.fid = &fid;
2626         oparms.reconnect = false;
2627
2628         rc = SMB2_open_init(tcon, server,
2629                             &rqst[0], &oplock, &oparms, utf16_path);
2630         if (rc)
2631                 goto qic_exit;
2632         smb2_set_next_command(tcon, &rqst[0]);
2633
2634         memset(&qi_iov, 0, sizeof(qi_iov));
2635         rqst[1].rq_iov = qi_iov;
2636         rqst[1].rq_nvec = 1;
2637
2638         rc = SMB2_query_info_init(tcon, server,
2639                                   &rqst[1], COMPOUND_FID, COMPOUND_FID,
2640                                   class, type, 0,
2641                                   output_len, 0,
2642                                   NULL);
2643         if (rc)
2644                 goto qic_exit;
2645         smb2_set_next_command(tcon, &rqst[1]);
2646         smb2_set_related(&rqst[1]);
2647
2648         memset(&close_iov, 0, sizeof(close_iov));
2649         rqst[2].rq_iov = close_iov;
2650         rqst[2].rq_nvec = 1;
2651
2652         rc = SMB2_close_init(tcon, server,
2653                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
2654         if (rc)
2655                 goto qic_exit;
2656         smb2_set_related(&rqst[2]);
2657
2658         rc = compound_send_recv(xid, ses, server,
2659                                 flags, 3, rqst,
2660                                 resp_buftype, rsp_iov);
2661         if (rc) {
2662                 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2663                 if (rc == -EREMCHG) {
2664                         tcon->need_reconnect = true;
2665                         pr_warn_once("server share %s deleted\n",
2666                                      tcon->treeName);
2667                 }
2668                 goto qic_exit;
2669         }
2670         *rsp = rsp_iov[1];
2671         *buftype = resp_buftype[1];
2672
2673  qic_exit:
2674         SMB2_open_free(&rqst[0]);
2675         SMB2_query_info_free(&rqst[1]);
2676         SMB2_close_free(&rqst[2]);
2677         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2678         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
2679         return rc;
2680 }
2681
2682 static int
2683 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2684              struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
2685 {
2686         struct smb2_query_info_rsp *rsp;
2687         struct smb2_fs_full_size_info *info = NULL;
2688         __le16 utf16_path = 0; /* Null - open root of share */
2689         struct kvec rsp_iov = {NULL, 0};
2690         int buftype = CIFS_NO_BUFFER;
2691         int rc;
2692
2693
2694         rc = smb2_query_info_compound(xid, tcon, &utf16_path,
2695                                       FILE_READ_ATTRIBUTES,
2696                                       FS_FULL_SIZE_INFORMATION,
2697                                       SMB2_O_INFO_FILESYSTEM,
2698                                       sizeof(struct smb2_fs_full_size_info),
2699                                       &rsp_iov, &buftype, cifs_sb);
2700         if (rc)
2701                 goto qfs_exit;
2702
2703         rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
2704         buf->f_type = SMB2_MAGIC_NUMBER;
2705         info = (struct smb2_fs_full_size_info *)(
2706                 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
2707         rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
2708                                le32_to_cpu(rsp->OutputBufferLength),
2709                                &rsp_iov,
2710                                sizeof(struct smb2_fs_full_size_info));
2711         if (!rc)
2712                 smb2_copy_fs_info_to_kstatfs(info, buf);
2713
2714 qfs_exit:
2715         free_rsp_buf(buftype, rsp_iov.iov_base);
2716         return rc;
2717 }
2718
2719 static int
2720 smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2721                struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
2722 {
2723         int rc;
2724         __le16 srch_path = 0; /* Null - open root of share */
2725         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2726         struct cifs_open_parms oparms;
2727         struct cifs_fid fid;
2728
2729         if (!tcon->posix_extensions)
2730                 return smb2_queryfs(xid, tcon, cifs_sb, buf);
2731
2732         oparms.tcon = tcon;
2733         oparms.desired_access = FILE_READ_ATTRIBUTES;
2734         oparms.disposition = FILE_OPEN;
2735         oparms.create_options = cifs_create_options(cifs_sb, 0);
2736         oparms.fid = &fid;
2737         oparms.reconnect = false;
2738
2739         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
2740                        NULL, NULL);
2741         if (rc)
2742                 return rc;
2743
2744         rc = SMB311_posix_qfs_info(xid, tcon, fid.persistent_fid,
2745                                    fid.volatile_fid, buf);
2746         buf->f_type = SMB2_MAGIC_NUMBER;
2747         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2748         return rc;
2749 }
2750
2751 static bool
2752 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
2753 {
2754         return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
2755                ob1->fid.volatile_fid == ob2->fid.volatile_fid;
2756 }
2757
2758 static int
2759 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
2760                __u64 length, __u32 type, int lock, int unlock, bool wait)
2761 {
2762         if (unlock && !lock)
2763                 type = SMB2_LOCKFLAG_UNLOCK;
2764         return SMB2_lock(xid, tlink_tcon(cfile->tlink),
2765                          cfile->fid.persistent_fid, cfile->fid.volatile_fid,
2766                          current->tgid, length, offset, type, wait);
2767 }
2768
2769 static void
2770 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
2771 {
2772         memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
2773 }
2774
2775 static void
2776 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
2777 {
2778         memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
2779 }
2780
2781 static void
2782 smb2_new_lease_key(struct cifs_fid *fid)
2783 {
2784         generate_random_uuid(fid->lease_key);
2785 }
2786
2787 static int
2788 smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
2789                    const char *search_name,
2790                    struct dfs_info3_param **target_nodes,
2791                    unsigned int *num_of_nodes,
2792                    const struct nls_table *nls_codepage, int remap)
2793 {
2794         int rc;
2795         __le16 *utf16_path = NULL;
2796         int utf16_path_len = 0;
2797         struct cifs_tcon *tcon;
2798         struct fsctl_get_dfs_referral_req *dfs_req = NULL;
2799         struct get_dfs_referral_rsp *dfs_rsp = NULL;
2800         u32 dfs_req_size = 0, dfs_rsp_size = 0;
2801
2802         cifs_dbg(FYI, "%s: path: %s\n", __func__, search_name);
2803
2804         /*
2805          * Try to use the IPC tcon, otherwise just use any
2806          */
2807         tcon = ses->tcon_ipc;
2808         if (tcon == NULL) {
2809                 spin_lock(&cifs_tcp_ses_lock);
2810                 tcon = list_first_entry_or_null(&ses->tcon_list,
2811                                                 struct cifs_tcon,
2812                                                 tcon_list);
2813                 if (tcon)
2814                         tcon->tc_count++;
2815                 spin_unlock(&cifs_tcp_ses_lock);
2816         }
2817
2818         if (tcon == NULL) {
2819                 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n",
2820                          ses);
2821                 rc = -ENOTCONN;
2822                 goto out;
2823         }
2824
2825         utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX,
2826                                            &utf16_path_len,
2827                                            nls_codepage, remap);
2828         if (!utf16_path) {
2829                 rc = -ENOMEM;
2830                 goto out;
2831         }
2832
2833         dfs_req_size = sizeof(*dfs_req) + utf16_path_len;
2834         dfs_req = kzalloc(dfs_req_size, GFP_KERNEL);
2835         if (!dfs_req) {
2836                 rc = -ENOMEM;
2837                 goto out;
2838         }
2839
2840         /* Highest DFS referral version understood */
2841         dfs_req->MaxReferralLevel = DFS_VERSION;
2842
2843         /* Path to resolve in an UTF-16 null-terminated string */
2844         memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len);
2845
2846         do {
2847                 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
2848                                 FSCTL_DFS_GET_REFERRALS,
2849                                 true /* is_fsctl */,
2850                                 (char *)dfs_req, dfs_req_size, CIFSMaxBufSize,
2851                                 (char **)&dfs_rsp, &dfs_rsp_size);
2852         } while (rc == -EAGAIN);
2853
2854         if (rc) {
2855                 if ((rc != -ENOENT) && (rc != -EOPNOTSUPP))
2856                         cifs_tcon_dbg(VFS, "ioctl error in %s rc=%d\n", __func__, rc);
2857                 goto out;
2858         }
2859
2860         rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size,
2861                                  num_of_nodes, target_nodes,
2862                                  nls_codepage, remap, search_name,
2863                                  true /* is_unicode */);
2864         if (rc) {
2865                 cifs_tcon_dbg(VFS, "parse error in %s rc=%d\n", __func__, rc);
2866                 goto out;
2867         }
2868
2869  out:
2870         if (tcon && !tcon->ipc) {
2871                 /* ipc tcons are not refcounted */
2872                 spin_lock(&cifs_tcp_ses_lock);
2873                 tcon->tc_count--;
2874                 spin_unlock(&cifs_tcp_ses_lock);
2875         }
2876         kfree(utf16_path);
2877         kfree(dfs_req);
2878         kfree(dfs_rsp);
2879         return rc;
2880 }
2881
2882 static int
2883 parse_reparse_posix(struct reparse_posix_data *symlink_buf,
2884                       u32 plen, char **target_path,
2885                       struct cifs_sb_info *cifs_sb)
2886 {
2887         unsigned int len;
2888
2889         /* See MS-FSCC 2.1.2.6 for the 'NFS' style reparse tags */
2890         len = le16_to_cpu(symlink_buf->ReparseDataLength);
2891
2892         if (le64_to_cpu(symlink_buf->InodeType) != NFS_SPECFILE_LNK) {
2893                 cifs_dbg(VFS, "%lld not a supported symlink type\n",
2894                         le64_to_cpu(symlink_buf->InodeType));
2895                 return -EOPNOTSUPP;
2896         }
2897
2898         *target_path = cifs_strndup_from_utf16(
2899                                 symlink_buf->PathBuffer,
2900                                 len, true, cifs_sb->local_nls);
2901         if (!(*target_path))
2902                 return -ENOMEM;
2903
2904         convert_delimiter(*target_path, '/');
2905         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
2906
2907         return 0;
2908 }
2909
2910 static int
2911 parse_reparse_symlink(struct reparse_symlink_data_buffer *symlink_buf,
2912                       u32 plen, char **target_path,
2913                       struct cifs_sb_info *cifs_sb)
2914 {
2915         unsigned int sub_len;
2916         unsigned int sub_offset;
2917
2918         /* We handle Symbolic Link reparse tag here. See: MS-FSCC 2.1.2.4 */
2919
2920         sub_offset = le16_to_cpu(symlink_buf->SubstituteNameOffset);
2921         sub_len = le16_to_cpu(symlink_buf->SubstituteNameLength);
2922         if (sub_offset + 20 > plen ||
2923             sub_offset + sub_len + 20 > plen) {
2924                 cifs_dbg(VFS, "srv returned malformed symlink buffer\n");
2925                 return -EIO;
2926         }
2927
2928         *target_path = cifs_strndup_from_utf16(
2929                                 symlink_buf->PathBuffer + sub_offset,
2930                                 sub_len, true, cifs_sb->local_nls);
2931         if (!(*target_path))
2932                 return -ENOMEM;
2933
2934         convert_delimiter(*target_path, '/');
2935         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
2936
2937         return 0;
2938 }
2939
2940 static int
2941 parse_reparse_point(struct reparse_data_buffer *buf,
2942                     u32 plen, char **target_path,
2943                     struct cifs_sb_info *cifs_sb)
2944 {
2945         if (plen < sizeof(struct reparse_data_buffer)) {
2946                 cifs_dbg(VFS, "reparse buffer is too small. Must be at least 8 bytes but was %d\n",
2947                          plen);
2948                 return -EIO;
2949         }
2950
2951         if (plen < le16_to_cpu(buf->ReparseDataLength) +
2952             sizeof(struct reparse_data_buffer)) {
2953                 cifs_dbg(VFS, "srv returned invalid reparse buf length: %d\n",
2954                          plen);
2955                 return -EIO;
2956         }
2957
2958         /* See MS-FSCC 2.1.2 */
2959         switch (le32_to_cpu(buf->ReparseTag)) {
2960         case IO_REPARSE_TAG_NFS:
2961                 return parse_reparse_posix(
2962                         (struct reparse_posix_data *)buf,
2963                         plen, target_path, cifs_sb);
2964         case IO_REPARSE_TAG_SYMLINK:
2965                 return parse_reparse_symlink(
2966                         (struct reparse_symlink_data_buffer *)buf,
2967                         plen, target_path, cifs_sb);
2968         default:
2969                 cifs_dbg(VFS, "srv returned unknown symlink buffer tag:0x%08x\n",
2970                          le32_to_cpu(buf->ReparseTag));
2971                 return -EOPNOTSUPP;
2972         }
2973 }
2974
2975 #define SMB2_SYMLINK_STRUCT_SIZE \
2976         (sizeof(struct smb2_err_rsp) - 1 + sizeof(struct smb2_symlink_err_rsp))
2977
2978 static int
2979 smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
2980                    struct cifs_sb_info *cifs_sb, const char *full_path,
2981                    char **target_path, bool is_reparse_point)
2982 {
2983         int rc;
2984         __le16 *utf16_path = NULL;
2985         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2986         struct cifs_open_parms oparms;
2987         struct cifs_fid fid;
2988         struct kvec err_iov = {NULL, 0};
2989         struct smb2_err_rsp *err_buf = NULL;
2990         struct smb2_symlink_err_rsp *symlink;
2991         struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
2992         unsigned int sub_len;
2993         unsigned int sub_offset;
2994         unsigned int print_len;
2995         unsigned int print_offset;
2996         int flags = CIFS_CP_CREATE_CLOSE_OP;
2997         struct smb_rqst rqst[3];
2998         int resp_buftype[3];
2999         struct kvec rsp_iov[3];
3000         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
3001         struct kvec io_iov[SMB2_IOCTL_IOV_SIZE];
3002         struct kvec close_iov[1];
3003         struct smb2_create_rsp *create_rsp;
3004         struct smb2_ioctl_rsp *ioctl_rsp;
3005         struct reparse_data_buffer *reparse_buf;
3006         int create_options = is_reparse_point ? OPEN_REPARSE_POINT : 0;
3007         u32 plen;
3008
3009         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
3010
3011         *target_path = NULL;
3012
3013         if (smb3_encryption_required(tcon))
3014                 flags |= CIFS_TRANSFORM_REQ;
3015
3016         memset(rqst, 0, sizeof(rqst));
3017         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
3018         memset(rsp_iov, 0, sizeof(rsp_iov));
3019
3020         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
3021         if (!utf16_path)
3022                 return -ENOMEM;
3023
3024         /* Open */
3025         memset(&open_iov, 0, sizeof(open_iov));
3026         rqst[0].rq_iov = open_iov;
3027         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
3028
3029         memset(&oparms, 0, sizeof(oparms));
3030         oparms.tcon = tcon;
3031         oparms.desired_access = FILE_READ_ATTRIBUTES;
3032         oparms.disposition = FILE_OPEN;
3033         oparms.create_options = cifs_create_options(cifs_sb, create_options);
3034         oparms.fid = &fid;
3035         oparms.reconnect = false;
3036
3037         rc = SMB2_open_init(tcon, server,
3038                             &rqst[0], &oplock, &oparms, utf16_path);
3039         if (rc)
3040                 goto querty_exit;
3041         smb2_set_next_command(tcon, &rqst[0]);
3042
3043
3044         /* IOCTL */
3045         memset(&io_iov, 0, sizeof(io_iov));
3046         rqst[1].rq_iov = io_iov;
3047         rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
3048
3049         rc = SMB2_ioctl_init(tcon, server,
3050                              &rqst[1], fid.persistent_fid,
3051                              fid.volatile_fid, FSCTL_GET_REPARSE_POINT,
3052                              true /* is_fctl */, NULL, 0,
3053                              CIFSMaxBufSize -
3054                              MAX_SMB2_CREATE_RESPONSE_SIZE -
3055                              MAX_SMB2_CLOSE_RESPONSE_SIZE);
3056         if (rc)
3057                 goto querty_exit;
3058
3059         smb2_set_next_command(tcon, &rqst[1]);
3060         smb2_set_related(&rqst[1]);
3061
3062
3063         /* Close */
3064         memset(&close_iov, 0, sizeof(close_iov));
3065         rqst[2].rq_iov = close_iov;
3066         rqst[2].rq_nvec = 1;
3067
3068         rc = SMB2_close_init(tcon, server,
3069                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
3070         if (rc)
3071                 goto querty_exit;
3072
3073         smb2_set_related(&rqst[2]);
3074
3075         rc = compound_send_recv(xid, tcon->ses, server,
3076                                 flags, 3, rqst,
3077                                 resp_buftype, rsp_iov);
3078
3079         create_rsp = rsp_iov[0].iov_base;
3080         if (create_rsp && create_rsp->sync_hdr.Status)
3081                 err_iov = rsp_iov[0];
3082         ioctl_rsp = rsp_iov[1].iov_base;
3083
3084         /*
3085          * Open was successful and we got an ioctl response.
3086          */
3087         if ((rc == 0) && (is_reparse_point)) {
3088                 /* See MS-FSCC 2.3.23 */
3089
3090                 reparse_buf = (struct reparse_data_buffer *)
3091                         ((char *)ioctl_rsp +
3092                          le32_to_cpu(ioctl_rsp->OutputOffset));
3093                 plen = le32_to_cpu(ioctl_rsp->OutputCount);
3094
3095                 if (plen + le32_to_cpu(ioctl_rsp->OutputOffset) >
3096                     rsp_iov[1].iov_len) {
3097                         cifs_tcon_dbg(VFS, "srv returned invalid ioctl len: %d\n",
3098                                  plen);
3099                         rc = -EIO;
3100                         goto querty_exit;
3101                 }
3102
3103                 rc = parse_reparse_point(reparse_buf, plen, target_path,
3104                                          cifs_sb);
3105                 goto querty_exit;
3106         }
3107
3108         if (!rc || !err_iov.iov_base) {
3109                 rc = -ENOENT;
3110                 goto querty_exit;
3111         }
3112
3113         err_buf = err_iov.iov_base;
3114         if (le32_to_cpu(err_buf->ByteCount) < sizeof(struct smb2_symlink_err_rsp) ||
3115             err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE) {
3116                 rc = -EINVAL;
3117                 goto querty_exit;
3118         }
3119
3120         symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData;
3121         if (le32_to_cpu(symlink->SymLinkErrorTag) != SYMLINK_ERROR_TAG ||
3122             le32_to_cpu(symlink->ReparseTag) != IO_REPARSE_TAG_SYMLINK) {
3123                 rc = -EINVAL;
3124                 goto querty_exit;
3125         }
3126
3127         /* open must fail on symlink - reset rc */
3128         rc = 0;
3129         sub_len = le16_to_cpu(symlink->SubstituteNameLength);
3130         sub_offset = le16_to_cpu(symlink->SubstituteNameOffset);
3131         print_len = le16_to_cpu(symlink->PrintNameLength);
3132         print_offset = le16_to_cpu(symlink->PrintNameOffset);
3133
3134         if (err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE + sub_offset + sub_len) {
3135                 rc = -EINVAL;
3136                 goto querty_exit;
3137         }
3138
3139         if (err_iov.iov_len <
3140             SMB2_SYMLINK_STRUCT_SIZE + print_offset + print_len) {
3141                 rc = -EINVAL;
3142                 goto querty_exit;
3143         }
3144
3145         *target_path = cifs_strndup_from_utf16(
3146                                 (char *)symlink->PathBuffer + sub_offset,
3147                                 sub_len, true, cifs_sb->local_nls);
3148         if (!(*target_path)) {
3149                 rc = -ENOMEM;
3150                 goto querty_exit;
3151         }
3152         convert_delimiter(*target_path, '/');
3153         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
3154
3155  querty_exit:
3156         cifs_dbg(FYI, "query symlink rc %d\n", rc);
3157         kfree(utf16_path);
3158         SMB2_open_free(&rqst[0]);
3159         SMB2_ioctl_free(&rqst[1]);
3160         SMB2_close_free(&rqst[2]);
3161         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
3162         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
3163         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
3164         return rc;
3165 }
3166
3167 int
3168 smb2_query_reparse_tag(const unsigned int xid, struct cifs_tcon *tcon,
3169                    struct cifs_sb_info *cifs_sb, const char *full_path,
3170                    __u32 *tag)
3171 {
3172         int rc;
3173         __le16 *utf16_path = NULL;
3174         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3175         struct cifs_open_parms oparms;
3176         struct cifs_fid fid;
3177         struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
3178         int flags = CIFS_CP_CREATE_CLOSE_OP;
3179         struct smb_rqst rqst[3];
3180         int resp_buftype[3];
3181         struct kvec rsp_iov[3];
3182         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
3183         struct kvec io_iov[SMB2_IOCTL_IOV_SIZE];
3184         struct kvec close_iov[1];
3185         struct smb2_ioctl_rsp *ioctl_rsp;
3186         struct reparse_data_buffer *reparse_buf;
3187         u32 plen;
3188
3189         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
3190
3191         if (smb3_encryption_required(tcon))
3192                 flags |= CIFS_TRANSFORM_REQ;
3193
3194         memset(rqst, 0, sizeof(rqst));
3195         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
3196         memset(rsp_iov, 0, sizeof(rsp_iov));
3197
3198         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
3199         if (!utf16_path)
3200                 return -ENOMEM;
3201
3202         /*
3203          * setup smb2open - TODO add optimization to call cifs_get_readable_path
3204          * to see if there is a handle already open that we can use
3205          */
3206         memset(&open_iov, 0, sizeof(open_iov));
3207         rqst[0].rq_iov = open_iov;
3208         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
3209
3210         memset(&oparms, 0, sizeof(oparms));
3211         oparms.tcon = tcon;
3212         oparms.desired_access = FILE_READ_ATTRIBUTES;
3213         oparms.disposition = FILE_OPEN;
3214         oparms.create_options = cifs_create_options(cifs_sb, OPEN_REPARSE_POINT);
3215         oparms.fid = &fid;
3216         oparms.reconnect = false;
3217
3218         rc = SMB2_open_init(tcon, server,
3219                             &rqst[0], &oplock, &oparms, utf16_path);
3220         if (rc)
3221                 goto query_rp_exit;
3222         smb2_set_next_command(tcon, &rqst[0]);
3223
3224
3225         /* IOCTL */
3226         memset(&io_iov, 0, sizeof(io_iov));
3227         rqst[1].rq_iov = io_iov;
3228         rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
3229
3230         rc = SMB2_ioctl_init(tcon, server,
3231                              &rqst[1], COMPOUND_FID,
3232                              COMPOUND_FID, FSCTL_GET_REPARSE_POINT,
3233                              true /* is_fctl */, NULL, 0,
3234                              CIFSMaxBufSize -
3235                              MAX_SMB2_CREATE_RESPONSE_SIZE -
3236                              MAX_SMB2_CLOSE_RESPONSE_SIZE);
3237         if (rc)
3238                 goto query_rp_exit;
3239
3240         smb2_set_next_command(tcon, &rqst[1]);
3241         smb2_set_related(&rqst[1]);
3242
3243
3244         /* Close */
3245         memset(&close_iov, 0, sizeof(close_iov));
3246         rqst[2].rq_iov = close_iov;
3247         rqst[2].rq_nvec = 1;
3248
3249         rc = SMB2_close_init(tcon, server,
3250                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
3251         if (rc)
3252                 goto query_rp_exit;
3253
3254         smb2_set_related(&rqst[2]);
3255
3256         rc = compound_send_recv(xid, tcon->ses, server,
3257                                 flags, 3, rqst,
3258                                 resp_buftype, rsp_iov);
3259
3260         ioctl_rsp = rsp_iov[1].iov_base;
3261
3262         /*
3263          * Open was successful and we got an ioctl response.
3264          */
3265         if (rc == 0) {
3266                 /* See MS-FSCC 2.3.23 */
3267
3268                 reparse_buf = (struct reparse_data_buffer *)
3269                         ((char *)ioctl_rsp +
3270                          le32_to_cpu(ioctl_rsp->OutputOffset));
3271                 plen = le32_to_cpu(ioctl_rsp->OutputCount);
3272
3273                 if (plen + le32_to_cpu(ioctl_rsp->OutputOffset) >
3274                     rsp_iov[1].iov_len) {
3275                         cifs_tcon_dbg(FYI, "srv returned invalid ioctl len: %d\n",
3276                                  plen);
3277                         rc = -EIO;
3278                         goto query_rp_exit;
3279                 }
3280                 *tag = le32_to_cpu(reparse_buf->ReparseTag);
3281         }
3282
3283  query_rp_exit:
3284         kfree(utf16_path);
3285         SMB2_open_free(&rqst[0]);
3286         SMB2_ioctl_free(&rqst[1]);
3287         SMB2_close_free(&rqst[2]);
3288         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
3289         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
3290         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
3291         return rc;
3292 }
3293
3294 static struct cifs_ntsd *
3295 get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb,
3296                     const struct cifs_fid *cifsfid, u32 *pacllen, u32 info)
3297 {
3298         struct cifs_ntsd *pntsd = NULL;
3299         unsigned int xid;
3300         int rc = -EOPNOTSUPP;
3301         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3302
3303         if (IS_ERR(tlink))
3304                 return ERR_CAST(tlink);
3305
3306         xid = get_xid();
3307         cifs_dbg(FYI, "trying to get acl\n");
3308
3309         rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid,
3310                             cifsfid->volatile_fid, (void **)&pntsd, pacllen,
3311                             info);
3312         free_xid(xid);
3313
3314         cifs_put_tlink(tlink);
3315
3316         cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
3317         if (rc)
3318                 return ERR_PTR(rc);
3319         return pntsd;
3320
3321 }
3322
3323 static struct cifs_ntsd *
3324 get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb,
3325                      const char *path, u32 *pacllen, u32 info)
3326 {
3327         struct cifs_ntsd *pntsd = NULL;
3328         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3329         unsigned int xid;
3330         int rc;
3331         struct cifs_tcon *tcon;
3332         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3333         struct cifs_fid fid;
3334         struct cifs_open_parms oparms;
3335         __le16 *utf16_path;
3336
3337         cifs_dbg(FYI, "get smb3 acl for path %s\n", path);
3338         if (IS_ERR(tlink))
3339                 return ERR_CAST(tlink);
3340
3341         tcon = tlink_tcon(tlink);
3342         xid = get_xid();
3343
3344         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
3345         if (!utf16_path) {
3346                 rc = -ENOMEM;
3347                 free_xid(xid);
3348                 return ERR_PTR(rc);
3349         }
3350
3351         oparms.tcon = tcon;
3352         oparms.desired_access = READ_CONTROL;
3353         oparms.disposition = FILE_OPEN;
3354         /*
3355          * When querying an ACL, even if the file is a symlink we want to open
3356          * the source not the target, and so the protocol requires that the
3357          * client specify this flag when opening a reparse point
3358          */
3359         oparms.create_options = cifs_create_options(cifs_sb, 0) | OPEN_REPARSE_POINT;
3360         oparms.fid = &fid;
3361         oparms.reconnect = false;
3362
3363         if (info & SACL_SECINFO)
3364                 oparms.desired_access |= SYSTEM_SECURITY;
3365
3366         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
3367                        NULL);
3368         kfree(utf16_path);
3369         if (!rc) {
3370                 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3371                                     fid.volatile_fid, (void **)&pntsd, pacllen,
3372                                     info);
3373                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3374         }
3375
3376         cifs_put_tlink(tlink);
3377         free_xid(xid);
3378
3379         cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
3380         if (rc)
3381                 return ERR_PTR(rc);
3382         return pntsd;
3383 }
3384
3385 static int
3386 set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
3387                 struct inode *inode, const char *path, int aclflag)
3388 {
3389         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3390         unsigned int xid;
3391         int rc, access_flags = 0;
3392         struct cifs_tcon *tcon;
3393         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
3394         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3395         struct cifs_fid fid;
3396         struct cifs_open_parms oparms;
3397         __le16 *utf16_path;
3398
3399         cifs_dbg(FYI, "set smb3 acl for path %s\n", path);
3400         if (IS_ERR(tlink))
3401                 return PTR_ERR(tlink);
3402
3403         tcon = tlink_tcon(tlink);
3404         xid = get_xid();
3405
3406         if (aclflag & CIFS_ACL_OWNER || aclflag & CIFS_ACL_GROUP)
3407                 access_flags |= WRITE_OWNER;
3408         if (aclflag & CIFS_ACL_SACL)
3409                 access_flags |= SYSTEM_SECURITY;
3410         if (aclflag & CIFS_ACL_DACL)
3411                 access_flags |= WRITE_DAC;
3412
3413         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
3414         if (!utf16_path) {
3415                 rc = -ENOMEM;
3416                 free_xid(xid);
3417                 return rc;
3418         }
3419
3420         oparms.tcon = tcon;
3421         oparms.desired_access = access_flags;
3422         oparms.create_options = cifs_create_options(cifs_sb, 0);
3423         oparms.disposition = FILE_OPEN;
3424         oparms.path = path;
3425         oparms.fid = &fid;
3426         oparms.reconnect = false;
3427
3428         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL,
3429                        NULL, NULL);
3430         kfree(utf16_path);
3431         if (!rc) {
3432                 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3433                             fid.volatile_fid, pnntsd, acllen, aclflag);
3434                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3435         }
3436
3437         cifs_put_tlink(tlink);
3438         free_xid(xid);
3439         return rc;
3440 }
3441
3442 /* Retrieve an ACL from the server */
3443 static struct cifs_ntsd *
3444 get_smb2_acl(struct cifs_sb_info *cifs_sb,
3445              struct inode *inode, const char *path,
3446              u32 *pacllen, u32 info)
3447 {
3448         struct cifs_ntsd *pntsd = NULL;
3449         struct cifsFileInfo *open_file = NULL;
3450
3451         if (inode && !(info & SACL_SECINFO))
3452                 open_file = find_readable_file(CIFS_I(inode), true);
3453         if (!open_file || (info & SACL_SECINFO))
3454                 return get_smb2_acl_by_path(cifs_sb, path, pacllen, info);
3455
3456         pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen, info);
3457         cifsFileInfo_put(open_file);
3458         return pntsd;
3459 }
3460
3461 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
3462                             loff_t offset, loff_t len, bool keep_size)
3463 {
3464         struct cifs_ses *ses = tcon->ses;
3465         struct inode *inode;
3466         struct cifsInodeInfo *cifsi;
3467         struct cifsFileInfo *cfile = file->private_data;
3468         struct file_zero_data_information fsctl_buf;
3469         long rc;
3470         unsigned int xid;
3471         __le64 eof;
3472
3473         xid = get_xid();
3474
3475         inode = d_inode(cfile->dentry);
3476         cifsi = CIFS_I(inode);
3477
3478         trace_smb3_zero_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3479                               ses->Suid, offset, len);
3480
3481         /*
3482          * We zero the range through ioctl, so we need remove the page caches
3483          * first, otherwise the data may be inconsistent with the server.
3484          */
3485         truncate_pagecache_range(inode, offset, offset + len - 1);
3486
3487         /* if file not oplocked can't be sure whether asking to extend size */
3488         if (!CIFS_CACHE_READ(cifsi))
3489                 if (keep_size == false) {
3490                         rc = -EOPNOTSUPP;
3491                         trace_smb3_zero_err(xid, cfile->fid.persistent_fid,
3492                                 tcon->tid, ses->Suid, offset, len, rc);
3493                         free_xid(xid);
3494                         return rc;
3495                 }
3496
3497         cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3498
3499         fsctl_buf.FileOffset = cpu_to_le64(offset);
3500         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3501
3502         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3503                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA, true,
3504                         (char *)&fsctl_buf,
3505                         sizeof(struct file_zero_data_information),
3506                         0, NULL, NULL);
3507         if (rc)
3508                 goto zero_range_exit;
3509
3510         /*
3511          * do we also need to change the size of the file?
3512          */
3513         if (keep_size == false && i_size_read(inode) < offset + len) {
3514                 eof = cpu_to_le64(offset + len);
3515                 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3516                                   cfile->fid.volatile_fid, cfile->pid, &eof);
3517         }
3518
3519  zero_range_exit:
3520         free_xid(xid);
3521         if (rc)
3522                 trace_smb3_zero_err(xid, cfile->fid.persistent_fid, tcon->tid,
3523                               ses->Suid, offset, len, rc);
3524         else
3525                 trace_smb3_zero_done(xid, cfile->fid.persistent_fid, tcon->tid,
3526                               ses->Suid, offset, len);
3527         return rc;
3528 }
3529
3530 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
3531                             loff_t offset, loff_t len)
3532 {
3533         struct inode *inode;
3534         struct cifsFileInfo *cfile = file->private_data;
3535         struct file_zero_data_information fsctl_buf;
3536         long rc;
3537         unsigned int xid;
3538         __u8 set_sparse = 1;
3539
3540         xid = get_xid();
3541
3542         inode = d_inode(cfile->dentry);
3543
3544         /* Need to make file sparse, if not already, before freeing range. */
3545         /* Consider adding equivalent for compressed since it could also work */
3546         if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) {
3547                 rc = -EOPNOTSUPP;
3548                 free_xid(xid);
3549                 return rc;
3550         }
3551
3552         /*
3553          * We implement the punch hole through ioctl, so we need remove the page
3554          * caches first, otherwise the data may be inconsistent with the server.
3555          */
3556         truncate_pagecache_range(inode, offset, offset + len - 1);
3557
3558         cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3559
3560         fsctl_buf.FileOffset = cpu_to_le64(offset);
3561         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3562
3563         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3564                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
3565                         true /* is_fctl */, (char *)&fsctl_buf,
3566                         sizeof(struct file_zero_data_information),
3567                         CIFSMaxBufSize, NULL, NULL);
3568         free_xid(xid);
3569         return rc;
3570 }
3571
3572 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
3573                             loff_t off, loff_t len, bool keep_size)
3574 {
3575         struct inode *inode;
3576         struct cifsInodeInfo *cifsi;
3577         struct cifsFileInfo *cfile = file->private_data;
3578         long rc = -EOPNOTSUPP;
3579         unsigned int xid;
3580         __le64 eof;
3581
3582         xid = get_xid();
3583
3584         inode = d_inode(cfile->dentry);
3585         cifsi = CIFS_I(inode);
3586
3587         trace_smb3_falloc_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3588                                 tcon->ses->Suid, off, len);
3589         /* if file not oplocked can't be sure whether asking to extend size */
3590         if (!CIFS_CACHE_READ(cifsi))
3591                 if (keep_size == false) {
3592                         trace_smb3_falloc_err(xid, cfile->fid.persistent_fid,
3593                                 tcon->tid, tcon->ses->Suid, off, len, rc);
3594                         free_xid(xid);
3595                         return rc;
3596                 }
3597
3598         /*
3599          * Extending the file
3600          */
3601         if ((keep_size == false) && i_size_read(inode) < off + len) {
3602                 rc = inode_newsize_ok(inode, off + len);
3603                 if (rc)
3604                         goto out;
3605
3606                 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0)
3607                         smb2_set_sparse(xid, tcon, cfile, inode, false);
3608
3609                 eof = cpu_to_le64(off + len);
3610                 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3611                                   cfile->fid.volatile_fid, cfile->pid, &eof);
3612                 if (rc == 0) {
3613                         cifsi->server_eof = off + len;
3614                         cifs_setsize(inode, off + len);
3615                         cifs_truncate_page(inode->i_mapping, inode->i_size);
3616                         truncate_setsize(inode, off + len);
3617                 }
3618                 goto out;
3619         }
3620
3621         /*
3622          * Files are non-sparse by default so falloc may be a no-op
3623          * Must check if file sparse. If not sparse, and since we are not
3624          * extending then no need to do anything since file already allocated
3625          */
3626         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
3627                 rc = 0;
3628                 goto out;
3629         }
3630
3631         if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
3632                 /*
3633                  * Check if falloc starts within first few pages of file
3634                  * and ends within a few pages of the end of file to
3635                  * ensure that most of file is being forced to be
3636                  * fallocated now. If so then setting whole file sparse
3637                  * ie potentially making a few extra pages at the beginning
3638                  * or end of the file non-sparse via set_sparse is harmless.
3639                  */
3640                 if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) {
3641                         rc = -EOPNOTSUPP;
3642                         goto out;
3643                 }
3644         }
3645
3646         smb2_set_sparse(xid, tcon, cfile, inode, false);
3647         rc = 0;
3648
3649 out:
3650         if (rc)
3651                 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid,
3652                                 tcon->ses->Suid, off, len, rc);
3653         else
3654                 trace_smb3_falloc_done(xid, cfile->fid.persistent_fid, tcon->tid,
3655                                 tcon->ses->Suid, off, len);
3656
3657         free_xid(xid);
3658         return rc;
3659 }
3660
3661 static loff_t smb3_llseek(struct file *file, struct cifs_tcon *tcon, loff_t offset, int whence)
3662 {
3663         struct cifsFileInfo *wrcfile, *cfile = file->private_data;
3664         struct cifsInodeInfo *cifsi;
3665         struct inode *inode;
3666         int rc = 0;
3667         struct file_allocated_range_buffer in_data, *out_data = NULL;
3668         u32 out_data_len;
3669         unsigned int xid;
3670
3671         if (whence != SEEK_HOLE && whence != SEEK_DATA)
3672                 return generic_file_llseek(file, offset, whence);
3673
3674         inode = d_inode(cfile->dentry);
3675         cifsi = CIFS_I(inode);
3676
3677         if (offset < 0 || offset >= i_size_read(inode))
3678                 return -ENXIO;
3679
3680         xid = get_xid();
3681         /*
3682          * We need to be sure that all dirty pages are written as they
3683          * might fill holes on the server.
3684          * Note that we also MUST flush any written pages since at least
3685          * some servers (Windows2016) will not reflect recent writes in
3686          * QUERY_ALLOCATED_RANGES until SMB2_flush is called.
3687          */
3688         wrcfile = find_writable_file(cifsi, FIND_WR_ANY);
3689         if (wrcfile) {
3690                 filemap_write_and_wait(inode->i_mapping);
3691                 smb2_flush_file(xid, tcon, &wrcfile->fid);
3692                 cifsFileInfo_put(wrcfile);
3693         }
3694
3695         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) {
3696                 if (whence == SEEK_HOLE)
3697                         offset = i_size_read(inode);
3698                 goto lseek_exit;
3699         }
3700
3701         in_data.file_offset = cpu_to_le64(offset);
3702         in_data.length = cpu_to_le64(i_size_read(inode));
3703
3704         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3705                         cfile->fid.volatile_fid,
3706                         FSCTL_QUERY_ALLOCATED_RANGES, true,
3707                         (char *)&in_data, sizeof(in_data),
3708                         sizeof(struct file_allocated_range_buffer),
3709                         (char **)&out_data, &out_data_len);
3710         if (rc == -E2BIG)
3711                 rc = 0;
3712         if (rc)
3713                 goto lseek_exit;
3714
3715         if (whence == SEEK_HOLE && out_data_len == 0)
3716                 goto lseek_exit;
3717
3718         if (whence == SEEK_DATA && out_data_len == 0) {
3719                 rc = -ENXIO;
3720                 goto lseek_exit;
3721         }
3722
3723         if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3724                 rc = -EINVAL;
3725                 goto lseek_exit;
3726         }
3727         if (whence == SEEK_DATA) {
3728                 offset = le64_to_cpu(out_data->file_offset);
3729                 goto lseek_exit;
3730         }
3731         if (offset < le64_to_cpu(out_data->file_offset))
3732                 goto lseek_exit;
3733
3734         offset = le64_to_cpu(out_data->file_offset) + le64_to_cpu(out_data->length);
3735
3736  lseek_exit:
3737         free_xid(xid);
3738         kfree(out_data);
3739         if (!rc)
3740                 return vfs_setpos(file, offset, inode->i_sb->s_maxbytes);
3741         else
3742                 return rc;
3743 }
3744
3745 static int smb3_fiemap(struct cifs_tcon *tcon,
3746                        struct cifsFileInfo *cfile,
3747                        struct fiemap_extent_info *fei, u64 start, u64 len)
3748 {
3749         unsigned int xid;
3750         struct file_allocated_range_buffer in_data, *out_data;
3751         u32 out_data_len;
3752         int i, num, rc, flags, last_blob;
3753         u64 next;
3754
3755         rc = fiemap_prep(d_inode(cfile->dentry), fei, start, &len, 0);
3756         if (rc)
3757                 return rc;
3758
3759         xid = get_xid();
3760  again:
3761         in_data.file_offset = cpu_to_le64(start);
3762         in_data.length = cpu_to_le64(len);
3763
3764         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3765                         cfile->fid.volatile_fid,
3766                         FSCTL_QUERY_ALLOCATED_RANGES, true,
3767                         (char *)&in_data, sizeof(in_data),
3768                         1024 * sizeof(struct file_allocated_range_buffer),
3769                         (char **)&out_data, &out_data_len);
3770         if (rc == -E2BIG) {
3771                 last_blob = 0;
3772                 rc = 0;
3773         } else
3774                 last_blob = 1;
3775         if (rc)
3776                 goto out;
3777
3778         if (out_data_len && out_data_len < sizeof(struct file_allocated_range_buffer)) {
3779                 rc = -EINVAL;
3780                 goto out;
3781         }
3782         if (out_data_len % sizeof(struct file_allocated_range_buffer)) {
3783                 rc = -EINVAL;
3784                 goto out;
3785         }
3786
3787         num = out_data_len / sizeof(struct file_allocated_range_buffer);
3788         for (i = 0; i < num; i++) {
3789                 flags = 0;
3790                 if (i == num - 1 && last_blob)
3791                         flags |= FIEMAP_EXTENT_LAST;
3792
3793                 rc = fiemap_fill_next_extent(fei,
3794                                 le64_to_cpu(out_data[i].file_offset),
3795                                 le64_to_cpu(out_data[i].file_offset),
3796                                 le64_to_cpu(out_data[i].length),
3797                                 flags);
3798                 if (rc < 0)
3799                         goto out;
3800                 if (rc == 1) {
3801                         rc = 0;
3802                         goto out;
3803                 }
3804         }
3805
3806         if (!last_blob) {
3807                 next = le64_to_cpu(out_data[num - 1].file_offset) +
3808                   le64_to_cpu(out_data[num - 1].length);
3809                 len = len - (next - start);
3810                 start = next;
3811                 goto again;
3812         }
3813
3814  out:
3815         free_xid(xid);
3816         kfree(out_data);
3817         return rc;
3818 }
3819
3820 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
3821                            loff_t off, loff_t len)
3822 {
3823         /* KEEP_SIZE already checked for by do_fallocate */
3824         if (mode & FALLOC_FL_PUNCH_HOLE)
3825                 return smb3_punch_hole(file, tcon, off, len);
3826         else if (mode & FALLOC_FL_ZERO_RANGE) {
3827                 if (mode & FALLOC_FL_KEEP_SIZE)
3828                         return smb3_zero_range(file, tcon, off, len, true);
3829                 return smb3_zero_range(file, tcon, off, len, false);
3830         } else if (mode == FALLOC_FL_KEEP_SIZE)
3831                 return smb3_simple_falloc(file, tcon, off, len, true);
3832         else if (mode == 0)
3833                 return smb3_simple_falloc(file, tcon, off, len, false);
3834
3835         return -EOPNOTSUPP;
3836 }
3837
3838 static void
3839 smb2_downgrade_oplock(struct TCP_Server_Info *server,
3840                       struct cifsInodeInfo *cinode, __u32 oplock,
3841                       unsigned int epoch, bool *purge_cache)
3842 {
3843         server->ops->set_oplock_level(cinode, oplock, 0, NULL);
3844 }
3845
3846 static void
3847 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3848                        unsigned int epoch, bool *purge_cache);
3849
3850 static void
3851 smb3_downgrade_oplock(struct TCP_Server_Info *server,
3852                        struct cifsInodeInfo *cinode, __u32 oplock,
3853                        unsigned int epoch, bool *purge_cache)
3854 {
3855         unsigned int old_state = cinode->oplock;
3856         unsigned int old_epoch = cinode->epoch;
3857         unsigned int new_state;
3858
3859         if (epoch > old_epoch) {
3860                 smb21_set_oplock_level(cinode, oplock, 0, NULL);
3861                 cinode->epoch = epoch;
3862         }
3863
3864         new_state = cinode->oplock;
3865         *purge_cache = false;
3866
3867         if ((old_state & CIFS_CACHE_READ_FLG) != 0 &&
3868             (new_state & CIFS_CACHE_READ_FLG) == 0)
3869                 *purge_cache = true;
3870         else if (old_state == new_state && (epoch - old_epoch > 1))
3871                 *purge_cache = true;
3872 }
3873
3874 static void
3875 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3876                       unsigned int epoch, bool *purge_cache)
3877 {
3878         oplock &= 0xFF;
3879         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
3880                 return;
3881         if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
3882                 cinode->oplock = CIFS_CACHE_RHW_FLG;
3883                 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
3884                          &cinode->vfs_inode);
3885         } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
3886                 cinode->oplock = CIFS_CACHE_RW_FLG;
3887                 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
3888                          &cinode->vfs_inode);
3889         } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
3890                 cinode->oplock = CIFS_CACHE_READ_FLG;
3891                 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
3892                          &cinode->vfs_inode);
3893         } else
3894                 cinode->oplock = 0;
3895 }
3896
3897 static void
3898 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3899                        unsigned int epoch, bool *purge_cache)
3900 {
3901         char message[5] = {0};
3902         unsigned int new_oplock = 0;
3903
3904         oplock &= 0xFF;
3905         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
3906                 return;
3907
3908         /* Check if the server granted an oplock rather than a lease */
3909         if (oplock & SMB2_OPLOCK_LEVEL_EXCLUSIVE)
3910                 return smb2_set_oplock_level(cinode, oplock, epoch,
3911                                              purge_cache);
3912
3913         if (oplock & SMB2_LEASE_READ_CACHING_HE) {
3914                 new_oplock |= CIFS_CACHE_READ_FLG;
3915                 strcat(message, "R");
3916         }
3917         if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
3918                 new_oplock |= CIFS_CACHE_HANDLE_FLG;
3919                 strcat(message, "H");
3920         }
3921         if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
3922                 new_oplock |= CIFS_CACHE_WRITE_FLG;
3923                 strcat(message, "W");
3924         }
3925         if (!new_oplock)
3926                 strncpy(message, "None", sizeof(message));
3927
3928         cinode->oplock = new_oplock;
3929         cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
3930                  &cinode->vfs_inode);
3931 }
3932
3933 static void
3934 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3935                       unsigned int epoch, bool *purge_cache)
3936 {
3937         unsigned int old_oplock = cinode->oplock;
3938
3939         smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
3940
3941         if (purge_cache) {
3942                 *purge_cache = false;
3943                 if (old_oplock == CIFS_CACHE_READ_FLG) {
3944                         if (cinode->oplock == CIFS_CACHE_READ_FLG &&
3945                             (epoch - cinode->epoch > 0))
3946                                 *purge_cache = true;
3947                         else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
3948                                  (epoch - cinode->epoch > 1))
3949                                 *purge_cache = true;
3950                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
3951                                  (epoch - cinode->epoch > 1))
3952                                 *purge_cache = true;
3953                         else if (cinode->oplock == 0 &&
3954                                  (epoch - cinode->epoch > 0))
3955                                 *purge_cache = true;
3956                 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
3957                         if (cinode->oplock == CIFS_CACHE_RH_FLG &&
3958                             (epoch - cinode->epoch > 0))
3959                                 *purge_cache = true;
3960                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
3961                                  (epoch - cinode->epoch > 1))
3962                                 *purge_cache = true;
3963                 }
3964                 cinode->epoch = epoch;
3965         }
3966 }
3967
3968 static bool
3969 smb2_is_read_op(__u32 oplock)
3970 {
3971         return oplock == SMB2_OPLOCK_LEVEL_II;
3972 }
3973
3974 static bool
3975 smb21_is_read_op(__u32 oplock)
3976 {
3977         return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
3978                !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
3979 }
3980
3981 static __le32
3982 map_oplock_to_lease(u8 oplock)
3983 {
3984         if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
3985                 return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING;
3986         else if (oplock == SMB2_OPLOCK_LEVEL_II)
3987                 return SMB2_LEASE_READ_CACHING;
3988         else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
3989                 return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING |
3990                        SMB2_LEASE_WRITE_CACHING;
3991         return 0;
3992 }
3993
3994 static char *
3995 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
3996 {
3997         struct create_lease *buf;
3998
3999         buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
4000         if (!buf)
4001                 return NULL;
4002
4003         memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
4004         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
4005
4006         buf->ccontext.DataOffset = cpu_to_le16(offsetof
4007                                         (struct create_lease, lcontext));
4008         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
4009         buf->ccontext.NameOffset = cpu_to_le16(offsetof
4010                                 (struct create_lease, Name));
4011         buf->ccontext.NameLength = cpu_to_le16(4);
4012         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
4013         buf->Name[0] = 'R';
4014         buf->Name[1] = 'q';
4015         buf->Name[2] = 'L';
4016         buf->Name[3] = 's';
4017         return (char *)buf;
4018 }
4019
4020 static char *
4021 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
4022 {
4023         struct create_lease_v2 *buf;
4024
4025         buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
4026         if (!buf)
4027                 return NULL;
4028
4029         memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
4030         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
4031
4032         buf->ccontext.DataOffset = cpu_to_le16(offsetof
4033                                         (struct create_lease_v2, lcontext));
4034         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
4035         buf->ccontext.NameOffset = cpu_to_le16(offsetof
4036                                 (struct create_lease_v2, Name));
4037         buf->ccontext.NameLength = cpu_to_le16(4);
4038         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
4039         buf->Name[0] = 'R';
4040         buf->Name[1] = 'q';
4041         buf->Name[2] = 'L';
4042         buf->Name[3] = 's';
4043         return (char *)buf;
4044 }
4045
4046 static __u8
4047 smb2_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
4048 {
4049         struct create_lease *lc = (struct create_lease *)buf;
4050
4051         *epoch = 0; /* not used */
4052         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
4053                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
4054         return le32_to_cpu(lc->lcontext.LeaseState);
4055 }
4056
4057 static __u8
4058 smb3_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
4059 {
4060         struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
4061
4062         *epoch = le16_to_cpu(lc->lcontext.Epoch);
4063         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
4064                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
4065         if (lease_key)
4066                 memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE);
4067         return le32_to_cpu(lc->lcontext.LeaseState);
4068 }
4069
4070 static unsigned int
4071 smb2_wp_retry_size(struct inode *inode)
4072 {
4073         return min_t(unsigned int, CIFS_SB(inode->i_sb)->ctx->wsize,
4074                      SMB2_MAX_BUFFER_SIZE);
4075 }
4076
4077 static bool
4078 smb2_dir_needs_close(struct cifsFileInfo *cfile)
4079 {
4080         return !cfile->invalidHandle;
4081 }
4082
4083 static void
4084 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len,
4085                    struct smb_rqst *old_rq, __le16 cipher_type)
4086 {
4087         struct smb2_sync_hdr *shdr =
4088                         (struct smb2_sync_hdr *)old_rq->rq_iov[0].iov_base;
4089
4090         memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
4091         tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
4092         tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
4093         tr_hdr->Flags = cpu_to_le16(0x01);
4094         if ((cipher_type == SMB2_ENCRYPTION_AES128_GCM) ||
4095             (cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4096                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
4097         else
4098                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
4099         memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8);
4100 }
4101
4102 /* We can not use the normal sg_set_buf() as we will sometimes pass a
4103  * stack object as buf.
4104  */
4105 static inline void smb2_sg_set_buf(struct scatterlist *sg, const void *buf,
4106                                    unsigned int buflen)
4107 {
4108         void *addr;
4109         /*
4110          * VMAP_STACK (at least) puts stack into the vmalloc address space
4111          */
4112         if (is_vmalloc_addr(buf))
4113                 addr = vmalloc_to_page(buf);
4114         else
4115                 addr = virt_to_page(buf);
4116         sg_set_page(sg, addr, buflen, offset_in_page(buf));
4117 }
4118
4119 /* Assumes the first rqst has a transform header as the first iov.
4120  * I.e.
4121  * rqst[0].rq_iov[0]  is transform header
4122  * rqst[0].rq_iov[1+] data to be encrypted/decrypted
4123  * rqst[1+].rq_iov[0+] data to be encrypted/decrypted
4124  */
4125 static struct scatterlist *
4126 init_sg(int num_rqst, struct smb_rqst *rqst, u8 *sign)
4127 {
4128         unsigned int sg_len;
4129         struct scatterlist *sg;
4130         unsigned int i;
4131         unsigned int j;
4132         unsigned int idx = 0;
4133         int skip;
4134
4135         sg_len = 1;
4136         for (i = 0; i < num_rqst; i++)
4137                 sg_len += rqst[i].rq_nvec + rqst[i].rq_npages;
4138
4139         sg = kmalloc_array(sg_len, sizeof(struct scatterlist), GFP_KERNEL);
4140         if (!sg)
4141                 return NULL;
4142
4143         sg_init_table(sg, sg_len);
4144         for (i = 0; i < num_rqst; i++) {
4145                 for (j = 0; j < rqst[i].rq_nvec; j++) {
4146                         /*
4147                          * The first rqst has a transform header where the
4148                          * first 20 bytes are not part of the encrypted blob
4149                          */
4150                         skip = (i == 0) && (j == 0) ? 20 : 0;
4151                         smb2_sg_set_buf(&sg[idx++],
4152                                         rqst[i].rq_iov[j].iov_base + skip,
4153                                         rqst[i].rq_iov[j].iov_len - skip);
4154                         }
4155
4156                 for (j = 0; j < rqst[i].rq_npages; j++) {
4157                         unsigned int len, offset;
4158
4159                         rqst_page_get_length(&rqst[i], j, &len, &offset);
4160                         sg_set_page(&sg[idx++], rqst[i].rq_pages[j], len, offset);
4161                 }
4162         }
4163         smb2_sg_set_buf(&sg[idx], sign, SMB2_SIGNATURE_SIZE);
4164         return sg;
4165 }
4166
4167 static int
4168 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)
4169 {
4170         struct cifs_ses *ses;
4171         u8 *ses_enc_key;
4172
4173         spin_lock(&cifs_tcp_ses_lock);
4174         list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
4175                 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
4176                         if (ses->Suid == ses_id) {
4177                                 ses_enc_key = enc ? ses->smb3encryptionkey :
4178                                         ses->smb3decryptionkey;
4179                                 memcpy(key, ses_enc_key, SMB3_ENC_DEC_KEY_SIZE);
4180                                 spin_unlock(&cifs_tcp_ses_lock);
4181                                 return 0;
4182                         }
4183                 }
4184         }
4185         spin_unlock(&cifs_tcp_ses_lock);
4186
4187         return 1;
4188 }
4189 /*
4190  * Encrypt or decrypt @rqst message. @rqst[0] has the following format:
4191  * iov[0]   - transform header (associate data),
4192  * iov[1-N] - SMB2 header and pages - data to encrypt.
4193  * On success return encrypted data in iov[1-N] and pages, leave iov[0]
4194  * untouched.
4195  */
4196 static int
4197 crypt_message(struct TCP_Server_Info *server, int num_rqst,
4198               struct smb_rqst *rqst, int enc)
4199 {
4200         struct smb2_transform_hdr *tr_hdr =
4201                 (struct smb2_transform_hdr *)rqst[0].rq_iov[0].iov_base;
4202         unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20;
4203         int rc = 0;
4204         struct scatterlist *sg;
4205         u8 sign[SMB2_SIGNATURE_SIZE] = {};
4206         u8 key[SMB3_ENC_DEC_KEY_SIZE];
4207         struct aead_request *req;
4208         char *iv;
4209         unsigned int iv_len;
4210         DECLARE_CRYPTO_WAIT(wait);
4211         struct crypto_aead *tfm;
4212         unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
4213
4214         rc = smb2_get_enc_key(server, tr_hdr->SessionId, enc, key);
4215         if (rc) {
4216                 cifs_server_dbg(VFS, "%s: Could not get %scryption key\n", __func__,
4217                          enc ? "en" : "de");
4218                 return rc;
4219         }
4220
4221         rc = smb3_crypto_aead_allocate(server);
4222         if (rc) {
4223                 cifs_server_dbg(VFS, "%s: crypto alloc failed\n", __func__);
4224                 return rc;
4225         }
4226
4227         tfm = enc ? server->secmech.ccmaesencrypt :
4228                                                 server->secmech.ccmaesdecrypt;
4229
4230         if ((server->cipher_type == SMB2_ENCRYPTION_AES256_CCM) ||
4231                 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4232                 rc = crypto_aead_setkey(tfm, key, SMB3_GCM256_CRYPTKEY_SIZE);
4233         else
4234                 rc = crypto_aead_setkey(tfm, key, SMB3_GCM128_CRYPTKEY_SIZE);
4235
4236         if (rc) {
4237                 cifs_server_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc);
4238                 return rc;
4239         }
4240
4241         rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE);
4242         if (rc) {
4243                 cifs_server_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc);
4244                 return rc;
4245         }
4246
4247         req = aead_request_alloc(tfm, GFP_KERNEL);
4248         if (!req) {
4249                 cifs_server_dbg(VFS, "%s: Failed to alloc aead request\n", __func__);
4250                 return -ENOMEM;
4251         }
4252
4253         if (!enc) {
4254                 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE);
4255                 crypt_len += SMB2_SIGNATURE_SIZE;
4256         }
4257
4258         sg = init_sg(num_rqst, rqst, sign);
4259         if (!sg) {
4260                 cifs_server_dbg(VFS, "%s: Failed to init sg\n", __func__);
4261                 rc = -ENOMEM;
4262                 goto free_req;
4263         }
4264
4265         iv_len = crypto_aead_ivsize(tfm);
4266         iv = kzalloc(iv_len, GFP_KERNEL);
4267         if (!iv) {
4268                 cifs_server_dbg(VFS, "%s: Failed to alloc iv\n", __func__);
4269                 rc = -ENOMEM;
4270                 goto free_sg;
4271         }
4272
4273         if ((server->cipher_type == SMB2_ENCRYPTION_AES128_GCM) ||
4274             (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4275                 memcpy(iv, (char *)tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
4276         else {
4277                 iv[0] = 3;
4278                 memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
4279         }
4280
4281         aead_request_set_crypt(req, sg, sg, crypt_len, iv);
4282         aead_request_set_ad(req, assoc_data_len);
4283
4284         aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
4285                                   crypto_req_done, &wait);
4286
4287         rc = crypto_wait_req(enc ? crypto_aead_encrypt(req)
4288                                 : crypto_aead_decrypt(req), &wait);
4289
4290         if (!rc && enc)
4291                 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE);
4292
4293         kfree(iv);
4294 free_sg:
4295         kfree(sg);
4296 free_req:
4297         kfree(req);
4298         return rc;
4299 }
4300
4301 void
4302 smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst)
4303 {
4304         int i, j;
4305
4306         for (i = 0; i < num_rqst; i++) {
4307                 if (rqst[i].rq_pages) {
4308                         for (j = rqst[i].rq_npages - 1; j >= 0; j--)
4309                                 put_page(rqst[i].rq_pages[j]);
4310                         kfree(rqst[i].rq_pages);
4311                 }
4312         }
4313 }
4314
4315 /*
4316  * This function will initialize new_rq and encrypt the content.
4317  * The first entry, new_rq[0], only contains a single iov which contains
4318  * a smb2_transform_hdr and is pre-allocated by the caller.
4319  * This function then populates new_rq[1+] with the content from olq_rq[0+].
4320  *
4321  * The end result is an array of smb_rqst structures where the first structure
4322  * only contains a single iov for the transform header which we then can pass
4323  * to crypt_message().
4324  *
4325  * new_rq[0].rq_iov[0] :  smb2_transform_hdr pre-allocated by the caller
4326  * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests
4327  */
4328 static int
4329 smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst,
4330                        struct smb_rqst *new_rq, struct smb_rqst *old_rq)
4331 {
4332         struct page **pages;
4333         struct smb2_transform_hdr *tr_hdr = new_rq[0].rq_iov[0].iov_base;
4334         unsigned int npages;
4335         unsigned int orig_len = 0;
4336         int i, j;
4337         int rc = -ENOMEM;
4338
4339         for (i = 1; i < num_rqst; i++) {
4340                 npages = old_rq[i - 1].rq_npages;
4341                 pages = kmalloc_array(npages, sizeof(struct page *),
4342                                       GFP_KERNEL);
4343                 if (!pages)
4344                         goto err_free;
4345
4346                 new_rq[i].rq_pages = pages;
4347                 new_rq[i].rq_npages = npages;
4348                 new_rq[i].rq_offset = old_rq[i - 1].rq_offset;
4349                 new_rq[i].rq_pagesz = old_rq[i - 1].rq_pagesz;
4350                 new_rq[i].rq_tailsz = old_rq[i - 1].rq_tailsz;
4351                 new_rq[i].rq_iov = old_rq[i - 1].rq_iov;
4352                 new_rq[i].rq_nvec = old_rq[i - 1].rq_nvec;
4353
4354                 orig_len += smb_rqst_len(server, &old_rq[i - 1]);
4355
4356                 for (j = 0; j < npages; j++) {
4357                         pages[j] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
4358                         if (!pages[j])
4359                                 goto err_free;
4360                 }
4361
4362                 /* copy pages form the old */
4363                 for (j = 0; j < npages; j++) {
4364                         char *dst, *src;
4365                         unsigned int offset, len;
4366
4367                         rqst_page_get_length(&new_rq[i], j, &len, &offset);
4368
4369                         dst = (char *) kmap(new_rq[i].rq_pages[j]) + offset;
4370                         src = (char *) kmap(old_rq[i - 1].rq_pages[j]) + offset;
4371
4372                         memcpy(dst, src, len);
4373                         kunmap(new_rq[i].rq_pages[j]);
4374                         kunmap(old_rq[i - 1].rq_pages[j]);
4375                 }
4376         }
4377
4378         /* fill the 1st iov with a transform header */
4379         fill_transform_hdr(tr_hdr, orig_len, old_rq, server->cipher_type);
4380
4381         rc = crypt_message(server, num_rqst, new_rq, 1);
4382         cifs_dbg(FYI, "Encrypt message returned %d\n", rc);
4383         if (rc)
4384                 goto err_free;
4385
4386         return rc;
4387
4388 err_free:
4389         smb3_free_compound_rqst(num_rqst - 1, &new_rq[1]);
4390         return rc;
4391 }
4392
4393 static int
4394 smb3_is_transform_hdr(void *buf)
4395 {
4396         struct smb2_transform_hdr *trhdr = buf;
4397
4398         return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
4399 }
4400
4401 static int
4402 decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
4403                  unsigned int buf_data_size, struct page **pages,
4404                  unsigned int npages, unsigned int page_data_size,
4405                  bool is_offloaded)
4406 {
4407         struct kvec iov[2];
4408         struct smb_rqst rqst = {NULL};
4409         int rc;
4410
4411         iov[0].iov_base = buf;
4412         iov[0].iov_len = sizeof(struct smb2_transform_hdr);
4413         iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr);
4414         iov[1].iov_len = buf_data_size;
4415
4416         rqst.rq_iov = iov;
4417         rqst.rq_nvec = 2;
4418         rqst.rq_pages = pages;
4419         rqst.rq_npages = npages;
4420         rqst.rq_pagesz = PAGE_SIZE;
4421         rqst.rq_tailsz = (page_data_size % PAGE_SIZE) ? : PAGE_SIZE;
4422
4423         rc = crypt_message(server, 1, &rqst, 0);
4424         cifs_dbg(FYI, "Decrypt message returned %d\n", rc);
4425
4426         if (rc)
4427                 return rc;
4428
4429         memmove(buf, iov[1].iov_base, buf_data_size);
4430
4431         if (!is_offloaded)
4432                 server->total_read = buf_data_size + page_data_size;
4433
4434         return rc;
4435 }
4436
4437 static int
4438 read_data_into_pages(struct TCP_Server_Info *server, struct page **pages,
4439                      unsigned int npages, unsigned int len)
4440 {
4441         int i;
4442         int length;
4443
4444         for (i = 0; i < npages; i++) {
4445                 struct page *page = pages[i];
4446                 size_t n;
4447
4448                 n = len;
4449                 if (len >= PAGE_SIZE) {
4450                         /* enough data to fill the page */
4451                         n = PAGE_SIZE;
4452                         len -= n;
4453                 } else {
4454                         zero_user(page, len, PAGE_SIZE - len);
4455                         len = 0;
4456                 }
4457                 length = cifs_read_page_from_socket(server, page, 0, n);
4458                 if (length < 0)
4459                         return length;
4460                 server->total_read += length;
4461         }
4462
4463         return 0;
4464 }
4465
4466 static int
4467 init_read_bvec(struct page **pages, unsigned int npages, unsigned int data_size,
4468                unsigned int cur_off, struct bio_vec **page_vec)
4469 {
4470         struct bio_vec *bvec;
4471         int i;
4472
4473         bvec = kcalloc(npages, sizeof(struct bio_vec), GFP_KERNEL);
4474         if (!bvec)
4475                 return -ENOMEM;
4476
4477         for (i = 0; i < npages; i++) {
4478                 bvec[i].bv_page = pages[i];
4479                 bvec[i].bv_offset = (i == 0) ? cur_off : 0;
4480                 bvec[i].bv_len = min_t(unsigned int, PAGE_SIZE, data_size);
4481                 data_size -= bvec[i].bv_len;
4482         }
4483
4484         if (data_size != 0) {
4485                 cifs_dbg(VFS, "%s: something went wrong\n", __func__);
4486                 kfree(bvec);
4487                 return -EIO;
4488         }
4489
4490         *page_vec = bvec;
4491         return 0;
4492 }
4493
4494 static int
4495 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
4496                  char *buf, unsigned int buf_len, struct page **pages,
4497                  unsigned int npages, unsigned int page_data_size,
4498                  bool is_offloaded)
4499 {
4500         unsigned int data_offset;
4501         unsigned int data_len;
4502         unsigned int cur_off;
4503         unsigned int cur_page_idx;
4504         unsigned int pad_len;
4505         struct cifs_readdata *rdata = mid->callback_data;
4506         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
4507         struct bio_vec *bvec = NULL;
4508         struct iov_iter iter;
4509         struct kvec iov;
4510         int length;
4511         bool use_rdma_mr = false;
4512
4513         if (shdr->Command != SMB2_READ) {
4514                 cifs_server_dbg(VFS, "only big read responses are supported\n");
4515                 return -ENOTSUPP;
4516         }
4517
4518         if (server->ops->is_session_expired &&
4519             server->ops->is_session_expired(buf)) {
4520                 if (!is_offloaded)
4521                         cifs_reconnect(server);
4522                 return -1;
4523         }
4524
4525         if (server->ops->is_status_pending &&
4526                         server->ops->is_status_pending(buf, server))
4527                 return -1;
4528
4529         /* set up first two iov to get credits */
4530         rdata->iov[0].iov_base = buf;
4531         rdata->iov[0].iov_len = 0;
4532         rdata->iov[1].iov_base = buf;
4533         rdata->iov[1].iov_len =
4534                 min_t(unsigned int, buf_len, server->vals->read_rsp_size);
4535         cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
4536                  rdata->iov[0].iov_base, rdata->iov[0].iov_len);
4537         cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n",
4538                  rdata->iov[1].iov_base, rdata->iov[1].iov_len);
4539
4540         rdata->result = server->ops->map_error(buf, true);
4541         if (rdata->result != 0) {
4542                 cifs_dbg(FYI, "%s: server returned error %d\n",
4543                          __func__, rdata->result);
4544                 /* normal error on read response */
4545                 if (is_offloaded)
4546                         mid->mid_state = MID_RESPONSE_RECEIVED;
4547                 else
4548                         dequeue_mid(mid, false);
4549                 return 0;
4550         }
4551
4552         data_offset = server->ops->read_data_offset(buf);
4553 #ifdef CONFIG_CIFS_SMB_DIRECT
4554         use_rdma_mr = rdata->mr;
4555 #endif
4556         data_len = server->ops->read_data_length(buf, use_rdma_mr);
4557
4558         if (data_offset < server->vals->read_rsp_size) {
4559                 /*
4560                  * win2k8 sometimes sends an offset of 0 when the read
4561                  * is beyond the EOF. Treat it as if the data starts just after
4562                  * the header.
4563                  */
4564                 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n",
4565                          __func__, data_offset);
4566                 data_offset = server->vals->read_rsp_size;
4567         } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) {
4568                 /* data_offset is beyond the end of smallbuf */
4569                 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n",
4570                          __func__, data_offset);
4571                 rdata->result = -EIO;
4572                 if (is_offloaded)
4573                         mid->mid_state = MID_RESPONSE_MALFORMED;
4574                 else
4575                         dequeue_mid(mid, rdata->result);
4576                 return 0;
4577         }
4578
4579         pad_len = data_offset - server->vals->read_rsp_size;
4580
4581         if (buf_len <= data_offset) {
4582                 /* read response payload is in pages */
4583                 cur_page_idx = pad_len / PAGE_SIZE;
4584                 cur_off = pad_len % PAGE_SIZE;
4585
4586                 if (cur_page_idx != 0) {
4587                         /* data offset is beyond the 1st page of response */
4588                         cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n",
4589                                  __func__, data_offset);
4590                         rdata->result = -EIO;
4591                         if (is_offloaded)
4592                                 mid->mid_state = MID_RESPONSE_MALFORMED;
4593                         else
4594                                 dequeue_mid(mid, rdata->result);
4595                         return 0;
4596                 }
4597
4598                 if (data_len > page_data_size - pad_len) {
4599                         /* data_len is corrupt -- discard frame */
4600                         rdata->result = -EIO;
4601                         if (is_offloaded)
4602                                 mid->mid_state = MID_RESPONSE_MALFORMED;
4603                         else
4604                                 dequeue_mid(mid, rdata->result);
4605                         return 0;
4606                 }
4607
4608                 rdata->result = init_read_bvec(pages, npages, page_data_size,
4609                                                cur_off, &bvec);
4610                 if (rdata->result != 0) {
4611                         if (is_offloaded)
4612                                 mid->mid_state = MID_RESPONSE_MALFORMED;
4613                         else
4614                                 dequeue_mid(mid, rdata->result);
4615                         return 0;
4616                 }
4617
4618                 iov_iter_bvec(&iter, WRITE, bvec, npages, data_len);
4619         } else if (buf_len >= data_offset + data_len) {
4620                 /* read response payload is in buf */
4621                 WARN_ONCE(npages > 0, "read data can be either in buf or in pages");
4622                 iov.iov_base = buf + data_offset;
4623                 iov.iov_len = data_len;
4624                 iov_iter_kvec(&iter, WRITE, &iov, 1, data_len);
4625         } else {
4626                 /* read response payload cannot be in both buf and pages */
4627                 WARN_ONCE(1, "buf can not contain only a part of read data");
4628                 rdata->result = -EIO;
4629                 if (is_offloaded)
4630                         mid->mid_state = MID_RESPONSE_MALFORMED;
4631                 else
4632                         dequeue_mid(mid, rdata->result);
4633                 return 0;
4634         }
4635
4636         length = rdata->copy_into_pages(server, rdata, &iter);
4637
4638         kfree(bvec);
4639
4640         if (length < 0)
4641                 return length;
4642
4643         if (is_offloaded)
4644                 mid->mid_state = MID_RESPONSE_RECEIVED;
4645         else
4646                 dequeue_mid(mid, false);
4647         return length;
4648 }
4649
4650 struct smb2_decrypt_work {
4651         struct work_struct decrypt;
4652         struct TCP_Server_Info *server;
4653         struct page **ppages;
4654         char *buf;
4655         unsigned int npages;
4656         unsigned int len;
4657 };
4658
4659
4660 static void smb2_decrypt_offload(struct work_struct *work)
4661 {
4662         struct smb2_decrypt_work *dw = container_of(work,
4663                                 struct smb2_decrypt_work, decrypt);
4664         int i, rc;
4665         struct mid_q_entry *mid;
4666
4667         rc = decrypt_raw_data(dw->server, dw->buf, dw->server->vals->read_rsp_size,
4668                               dw->ppages, dw->npages, dw->len, true);
4669         if (rc) {
4670                 cifs_dbg(VFS, "error decrypting rc=%d\n", rc);
4671                 goto free_pages;
4672         }
4673
4674         dw->server->lstrp = jiffies;
4675         mid = smb2_find_dequeue_mid(dw->server, dw->buf);
4676         if (mid == NULL)
4677                 cifs_dbg(FYI, "mid not found\n");
4678         else {
4679                 mid->decrypted = true;
4680                 rc = handle_read_data(dw->server, mid, dw->buf,
4681                                       dw->server->vals->read_rsp_size,
4682                                       dw->ppages, dw->npages, dw->len,
4683                                       true);
4684                 if (rc >= 0) {
4685 #ifdef CONFIG_CIFS_STATS2
4686                         mid->when_received = jiffies;
4687 #endif
4688                         if (dw->server->ops->is_network_name_deleted)
4689                                 dw->server->ops->is_network_name_deleted(dw->buf,
4690                                                                          dw->server);
4691
4692                         mid->callback(mid);
4693                 } else {
4694                         spin_lock(&GlobalMid_Lock);
4695                         if (dw->server->tcpStatus == CifsNeedReconnect) {
4696                                 mid->mid_state = MID_RETRY_NEEDED;
4697                                 spin_unlock(&GlobalMid_Lock);
4698                                 mid->callback(mid);
4699                         } else {
4700                                 mid->mid_state = MID_REQUEST_SUBMITTED;
4701                                 mid->mid_flags &= ~(MID_DELETED);
4702                                 list_add_tail(&mid->qhead,
4703                                         &dw->server->pending_mid_q);
4704                                 spin_unlock(&GlobalMid_Lock);
4705                         }
4706                 }
4707                 cifs_mid_q_entry_release(mid);
4708         }
4709
4710 free_pages:
4711         for (i = dw->npages-1; i >= 0; i--)
4712                 put_page(dw->ppages[i]);
4713
4714         kfree(dw->ppages);
4715         cifs_small_buf_release(dw->buf);
4716         kfree(dw);
4717 }
4718
4719
4720 static int
4721 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid,
4722                        int *num_mids)
4723 {
4724         char *buf = server->smallbuf;
4725         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
4726         unsigned int npages;
4727         struct page **pages;
4728         unsigned int len;
4729         unsigned int buflen = server->pdu_size;
4730         int rc;
4731         int i = 0;
4732         struct smb2_decrypt_work *dw;
4733
4734         *num_mids = 1;
4735         len = min_t(unsigned int, buflen, server->vals->read_rsp_size +
4736                 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1;
4737
4738         rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len);
4739         if (rc < 0)
4740                 return rc;
4741         server->total_read += rc;
4742
4743         len = le32_to_cpu(tr_hdr->OriginalMessageSize) -
4744                 server->vals->read_rsp_size;
4745         npages = DIV_ROUND_UP(len, PAGE_SIZE);
4746
4747         pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
4748         if (!pages) {
4749                 rc = -ENOMEM;
4750                 goto discard_data;
4751         }
4752
4753         for (; i < npages; i++) {
4754                 pages[i] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
4755                 if (!pages[i]) {
4756                         rc = -ENOMEM;
4757                         goto discard_data;
4758                 }
4759         }
4760
4761         /* read read data into pages */
4762         rc = read_data_into_pages(server, pages, npages, len);
4763         if (rc)
4764                 goto free_pages;
4765
4766         rc = cifs_discard_remaining_data(server);
4767         if (rc)
4768                 goto free_pages;
4769
4770         /*
4771          * For large reads, offload to different thread for better performance,
4772          * use more cores decrypting which can be expensive
4773          */
4774
4775         if ((server->min_offload) && (server->in_flight > 1) &&
4776             (server->pdu_size >= server->min_offload)) {
4777                 dw = kmalloc(sizeof(struct smb2_decrypt_work), GFP_KERNEL);
4778                 if (dw == NULL)
4779                         goto non_offloaded_decrypt;
4780
4781                 dw->buf = server->smallbuf;
4782                 server->smallbuf = (char *)cifs_small_buf_get();
4783
4784                 INIT_WORK(&dw->decrypt, smb2_decrypt_offload);
4785
4786                 dw->npages = npages;
4787                 dw->server = server;
4788                 dw->ppages = pages;
4789                 dw->len = len;
4790                 queue_work(decrypt_wq, &dw->decrypt);
4791                 *num_mids = 0; /* worker thread takes care of finding mid */
4792                 return -1;
4793         }
4794
4795 non_offloaded_decrypt:
4796         rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size,
4797                               pages, npages, len, false);
4798         if (rc)
4799                 goto free_pages;
4800
4801         *mid = smb2_find_mid(server, buf);
4802         if (*mid == NULL)
4803                 cifs_dbg(FYI, "mid not found\n");
4804         else {
4805                 cifs_dbg(FYI, "mid found\n");
4806                 (*mid)->decrypted = true;
4807                 rc = handle_read_data(server, *mid, buf,
4808                                       server->vals->read_rsp_size,
4809                                       pages, npages, len, false);
4810                 if (rc >= 0) {
4811                         if (server->ops->is_network_name_deleted) {
4812                                 server->ops->is_network_name_deleted(buf,
4813                                                                 server);
4814                         }
4815                 }
4816         }
4817
4818 free_pages:
4819         for (i = i - 1; i >= 0; i--)
4820                 put_page(pages[i]);
4821         kfree(pages);
4822         return rc;
4823 discard_data:
4824         cifs_discard_remaining_data(server);
4825         goto free_pages;
4826 }
4827
4828 static int
4829 receive_encrypted_standard(struct TCP_Server_Info *server,
4830                            struct mid_q_entry **mids, char **bufs,
4831                            int *num_mids)
4832 {
4833         int ret, length;
4834         char *buf = server->smallbuf;
4835         struct smb2_sync_hdr *shdr;
4836         unsigned int pdu_length = server->pdu_size;
4837         unsigned int buf_size;
4838         struct mid_q_entry *mid_entry;
4839         int next_is_large;
4840         char *next_buffer = NULL;
4841
4842         *num_mids = 0;
4843
4844         /* switch to large buffer if too big for a small one */
4845         if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) {
4846                 server->large_buf = true;
4847                 memcpy(server->bigbuf, buf, server->total_read);
4848                 buf = server->bigbuf;
4849         }
4850
4851         /* now read the rest */
4852         length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
4853                                 pdu_length - HEADER_SIZE(server) + 1);
4854         if (length < 0)
4855                 return length;
4856         server->total_read += length;
4857
4858         buf_size = pdu_length - sizeof(struct smb2_transform_hdr);
4859         length = decrypt_raw_data(server, buf, buf_size, NULL, 0, 0, false);
4860         if (length)
4861                 return length;
4862
4863         next_is_large = server->large_buf;
4864 one_more:
4865         shdr = (struct smb2_sync_hdr *)buf;
4866         if (shdr->NextCommand) {
4867                 if (next_is_large)
4868                         next_buffer = (char *)cifs_buf_get();
4869                 else
4870                         next_buffer = (char *)cifs_small_buf_get();
4871                 memcpy(next_buffer,
4872                        buf + le32_to_cpu(shdr->NextCommand),
4873                        pdu_length - le32_to_cpu(shdr->NextCommand));
4874         }
4875
4876         mid_entry = smb2_find_mid(server, buf);
4877         if (mid_entry == NULL)
4878                 cifs_dbg(FYI, "mid not found\n");
4879         else {
4880                 cifs_dbg(FYI, "mid found\n");
4881                 mid_entry->decrypted = true;
4882                 mid_entry->resp_buf_size = server->pdu_size;
4883         }
4884
4885         if (*num_mids >= MAX_COMPOUND) {
4886                 cifs_server_dbg(VFS, "too many PDUs in compound\n");
4887                 return -1;
4888         }
4889         bufs[*num_mids] = buf;
4890         mids[(*num_mids)++] = mid_entry;
4891
4892         if (mid_entry && mid_entry->handle)
4893                 ret = mid_entry->handle(server, mid_entry);
4894         else
4895                 ret = cifs_handle_standard(server, mid_entry);
4896
4897         if (ret == 0 && shdr->NextCommand) {
4898                 pdu_length -= le32_to_cpu(shdr->NextCommand);
4899                 server->large_buf = next_is_large;
4900                 if (next_is_large)
4901                         server->bigbuf = buf = next_buffer;
4902                 else
4903                         server->smallbuf = buf = next_buffer;
4904                 goto one_more;
4905         } else if (ret != 0) {
4906                 /*
4907                  * ret != 0 here means that we didn't get to handle_mid() thus
4908                  * server->smallbuf and server->bigbuf are still valid. We need
4909                  * to free next_buffer because it is not going to be used
4910                  * anywhere.
4911                  */
4912                 if (next_is_large)
4913                         free_rsp_buf(CIFS_LARGE_BUFFER, next_buffer);
4914                 else
4915                         free_rsp_buf(CIFS_SMALL_BUFFER, next_buffer);
4916         }
4917
4918         return ret;
4919 }
4920
4921 static int
4922 smb3_receive_transform(struct TCP_Server_Info *server,
4923                        struct mid_q_entry **mids, char **bufs, int *num_mids)
4924 {
4925         char *buf = server->smallbuf;
4926         unsigned int pdu_length = server->pdu_size;
4927         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
4928         unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
4929
4930         if (pdu_length < sizeof(struct smb2_transform_hdr) +
4931                                                 sizeof(struct smb2_sync_hdr)) {
4932                 cifs_server_dbg(VFS, "Transform message is too small (%u)\n",
4933                          pdu_length);
4934                 cifs_reconnect(server);
4935                 return -ECONNABORTED;
4936         }
4937
4938         if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) {
4939                 cifs_server_dbg(VFS, "Transform message is broken\n");
4940                 cifs_reconnect(server);
4941                 return -ECONNABORTED;
4942         }
4943
4944         /* TODO: add support for compounds containing READ. */
4945         if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server)) {
4946                 return receive_encrypted_read(server, &mids[0], num_mids);
4947         }
4948
4949         return receive_encrypted_standard(server, mids, bufs, num_mids);
4950 }
4951
4952 int
4953 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid)
4954 {
4955         char *buf = server->large_buf ? server->bigbuf : server->smallbuf;
4956
4957         return handle_read_data(server, mid, buf, server->pdu_size,
4958                                 NULL, 0, 0, false);
4959 }
4960
4961 static int
4962 smb2_next_header(char *buf)
4963 {
4964         struct smb2_sync_hdr *hdr = (struct smb2_sync_hdr *)buf;
4965         struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf;
4966
4967         if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM)
4968                 return sizeof(struct smb2_transform_hdr) +
4969                   le32_to_cpu(t_hdr->OriginalMessageSize);
4970
4971         return le32_to_cpu(hdr->NextCommand);
4972 }
4973
4974 static int
4975 smb2_make_node(unsigned int xid, struct inode *inode,
4976                struct dentry *dentry, struct cifs_tcon *tcon,
4977                const char *full_path, umode_t mode, dev_t dev)
4978 {
4979         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
4980         int rc = -EPERM;
4981         FILE_ALL_INFO *buf = NULL;
4982         struct cifs_io_parms io_parms = {0};
4983         __u32 oplock = 0;
4984         struct cifs_fid fid;
4985         struct cifs_open_parms oparms;
4986         unsigned int bytes_written;
4987         struct win_dev *pdev;
4988         struct kvec iov[2];
4989
4990         /*
4991          * Check if mounted with mount parm 'sfu' mount parm.
4992          * SFU emulation should work with all servers, but only
4993          * supports block and char device (no socket & fifo),
4994          * and was used by default in earlier versions of Windows
4995          */
4996         if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL))
4997                 goto out;
4998
4999         /*
5000          * TODO: Add ability to create instead via reparse point. Windows (e.g.
5001          * their current NFS server) uses this approach to expose special files
5002          * over SMB2/SMB3 and Samba will do this with SMB3.1.1 POSIX Extensions
5003          */
5004
5005         if (!S_ISCHR(mode) && !S_ISBLK(mode))
5006                 goto out;
5007
5008         cifs_dbg(FYI, "sfu compat create special file\n");
5009
5010         buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
5011         if (buf == NULL) {
5012                 rc = -ENOMEM;
5013                 goto out;
5014         }
5015
5016         oparms.tcon = tcon;
5017         oparms.cifs_sb = cifs_sb;
5018         oparms.desired_access = GENERIC_WRITE;
5019         oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR |
5020                                                     CREATE_OPTION_SPECIAL);
5021         oparms.disposition = FILE_CREATE;
5022         oparms.path = full_path;
5023         oparms.fid = &fid;
5024         oparms.reconnect = false;
5025
5026         if (tcon->ses->server->oplocks)
5027                 oplock = REQ_OPLOCK;
5028         else
5029                 oplock = 0;
5030         rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, buf);
5031         if (rc)
5032                 goto out;
5033
5034         /*
5035          * BB Do not bother to decode buf since no local inode yet to put
5036          * timestamps in, but we can reuse it safely.
5037          */
5038
5039         pdev = (struct win_dev *)buf;
5040         io_parms.pid = current->tgid;
5041         io_parms.tcon = tcon;
5042         io_parms.offset = 0;
5043         io_parms.length = sizeof(struct win_dev);
5044         iov[1].iov_base = buf;
5045         iov[1].iov_len = sizeof(struct win_dev);
5046         if (S_ISCHR(mode)) {
5047                 memcpy(pdev->type, "IntxCHR", 8);
5048                 pdev->major = cpu_to_le64(MAJOR(dev));
5049                 pdev->minor = cpu_to_le64(MINOR(dev));
5050                 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
5051                                                         &bytes_written, iov, 1);
5052         } else if (S_ISBLK(mode)) {
5053                 memcpy(pdev->type, "IntxBLK", 8);
5054                 pdev->major = cpu_to_le64(MAJOR(dev));
5055                 pdev->minor = cpu_to_le64(MINOR(dev));
5056                 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
5057                                                         &bytes_written, iov, 1);
5058         }
5059         tcon->ses->server->ops->close(xid, tcon, &fid);
5060         d_drop(dentry);
5061
5062         /* FIXME: add code here to set EAs */
5063 out:
5064         kfree(buf);
5065         return rc;
5066 }
5067
5068
5069 struct smb_version_operations smb20_operations = {
5070         .compare_fids = smb2_compare_fids,
5071         .setup_request = smb2_setup_request,
5072         .setup_async_request = smb2_setup_async_request,
5073         .check_receive = smb2_check_receive,
5074         .add_credits = smb2_add_credits,
5075         .set_credits = smb2_set_credits,
5076         .get_credits_field = smb2_get_credits_field,
5077         .get_credits = smb2_get_credits,
5078         .wait_mtu_credits = cifs_wait_mtu_credits,
5079         .get_next_mid = smb2_get_next_mid,
5080         .revert_current_mid = smb2_revert_current_mid,
5081         .read_data_offset = smb2_read_data_offset,
5082         .read_data_length = smb2_read_data_length,
5083         .map_error = map_smb2_to_linux_error,
5084         .find_mid = smb2_find_mid,
5085         .check_message = smb2_check_message,
5086         .dump_detail = smb2_dump_detail,
5087         .clear_stats = smb2_clear_stats,
5088         .print_stats = smb2_print_stats,
5089         .is_oplock_break = smb2_is_valid_oplock_break,
5090         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5091         .downgrade_oplock = smb2_downgrade_oplock,
5092         .need_neg = smb2_need_neg,
5093         .negotiate = smb2_negotiate,
5094         .negotiate_wsize = smb2_negotiate_wsize,
5095         .negotiate_rsize = smb2_negotiate_rsize,
5096         .sess_setup = SMB2_sess_setup,
5097         .logoff = SMB2_logoff,
5098         .tree_connect = SMB2_tcon,
5099         .tree_disconnect = SMB2_tdis,
5100         .qfs_tcon = smb2_qfs_tcon,
5101         .is_path_accessible = smb2_is_path_accessible,
5102         .can_echo = smb2_can_echo,
5103         .echo = SMB2_echo,
5104         .query_path_info = smb2_query_path_info,
5105         .get_srv_inum = smb2_get_srv_inum,
5106         .query_file_info = smb2_query_file_info,
5107         .set_path_size = smb2_set_path_size,
5108         .set_file_size = smb2_set_file_size,
5109         .set_file_info = smb2_set_file_info,
5110         .set_compression = smb2_set_compression,
5111         .mkdir = smb2_mkdir,
5112         .mkdir_setinfo = smb2_mkdir_setinfo,
5113         .rmdir = smb2_rmdir,
5114         .unlink = smb2_unlink,
5115         .rename = smb2_rename_path,
5116         .create_hardlink = smb2_create_hardlink,
5117         .query_symlink = smb2_query_symlink,
5118         .query_mf_symlink = smb3_query_mf_symlink,
5119         .create_mf_symlink = smb3_create_mf_symlink,
5120         .open = smb2_open_file,
5121         .set_fid = smb2_set_fid,
5122         .close = smb2_close_file,
5123         .flush = smb2_flush_file,
5124         .async_readv = smb2_async_readv,
5125         .async_writev = smb2_async_writev,
5126         .sync_read = smb2_sync_read,
5127         .sync_write = smb2_sync_write,
5128         .query_dir_first = smb2_query_dir_first,
5129         .query_dir_next = smb2_query_dir_next,
5130         .close_dir = smb2_close_dir,
5131         .calc_smb_size = smb2_calc_size,
5132         .is_status_pending = smb2_is_status_pending,
5133         .is_session_expired = smb2_is_session_expired,
5134         .oplock_response = smb2_oplock_response,
5135         .queryfs = smb2_queryfs,
5136         .mand_lock = smb2_mand_lock,
5137         .mand_unlock_range = smb2_unlock_range,
5138         .push_mand_locks = smb2_push_mandatory_locks,
5139         .get_lease_key = smb2_get_lease_key,
5140         .set_lease_key = smb2_set_lease_key,
5141         .new_lease_key = smb2_new_lease_key,
5142         .calc_signature = smb2_calc_signature,
5143         .is_read_op = smb2_is_read_op,
5144         .set_oplock_level = smb2_set_oplock_level,
5145         .create_lease_buf = smb2_create_lease_buf,
5146         .parse_lease_buf = smb2_parse_lease_buf,
5147         .copychunk_range = smb2_copychunk_range,
5148         .wp_retry_size = smb2_wp_retry_size,
5149         .dir_needs_close = smb2_dir_needs_close,
5150         .get_dfs_refer = smb2_get_dfs_refer,
5151         .select_sectype = smb2_select_sectype,
5152 #ifdef CONFIG_CIFS_XATTR
5153         .query_all_EAs = smb2_query_eas,
5154         .set_EA = smb2_set_ea,
5155 #endif /* CIFS_XATTR */
5156         .get_acl = get_smb2_acl,
5157         .get_acl_by_fid = get_smb2_acl_by_fid,
5158         .set_acl = set_smb2_acl,
5159         .next_header = smb2_next_header,
5160         .ioctl_query_info = smb2_ioctl_query_info,
5161         .make_node = smb2_make_node,
5162         .fiemap = smb3_fiemap,
5163         .llseek = smb3_llseek,
5164         .is_status_io_timeout = smb2_is_status_io_timeout,
5165         .is_network_name_deleted = smb2_is_network_name_deleted,
5166 };
5167
5168 struct smb_version_operations smb21_operations = {
5169         .compare_fids = smb2_compare_fids,
5170         .setup_request = smb2_setup_request,
5171         .setup_async_request = smb2_setup_async_request,
5172         .check_receive = smb2_check_receive,
5173         .add_credits = smb2_add_credits,
5174         .set_credits = smb2_set_credits,
5175         .get_credits_field = smb2_get_credits_field,
5176         .get_credits = smb2_get_credits,
5177         .wait_mtu_credits = smb2_wait_mtu_credits,
5178         .adjust_credits = smb2_adjust_credits,
5179         .get_next_mid = smb2_get_next_mid,
5180         .revert_current_mid = smb2_revert_current_mid,
5181         .read_data_offset = smb2_read_data_offset,
5182         .read_data_length = smb2_read_data_length,
5183         .map_error = map_smb2_to_linux_error,
5184         .find_mid = smb2_find_mid,
5185         .check_message = smb2_check_message,
5186         .dump_detail = smb2_dump_detail,
5187         .clear_stats = smb2_clear_stats,
5188         .print_stats = smb2_print_stats,
5189         .is_oplock_break = smb2_is_valid_oplock_break,
5190         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5191         .downgrade_oplock = smb2_downgrade_oplock,
5192         .need_neg = smb2_need_neg,
5193         .negotiate = smb2_negotiate,
5194         .negotiate_wsize = smb2_negotiate_wsize,
5195         .negotiate_rsize = smb2_negotiate_rsize,
5196         .sess_setup = SMB2_sess_setup,
5197         .logoff = SMB2_logoff,
5198         .tree_connect = SMB2_tcon,
5199         .tree_disconnect = SMB2_tdis,
5200         .qfs_tcon = smb2_qfs_tcon,
5201         .is_path_accessible = smb2_is_path_accessible,
5202         .can_echo = smb2_can_echo,
5203         .echo = SMB2_echo,
5204         .query_path_info = smb2_query_path_info,
5205         .get_srv_inum = smb2_get_srv_inum,
5206         .query_file_info = smb2_query_file_info,
5207         .set_path_size = smb2_set_path_size,
5208         .set_file_size = smb2_set_file_size,
5209         .set_file_info = smb2_set_file_info,
5210         .set_compression = smb2_set_compression,
5211         .mkdir = smb2_mkdir,
5212         .mkdir_setinfo = smb2_mkdir_setinfo,
5213         .rmdir = smb2_rmdir,
5214         .unlink = smb2_unlink,
5215         .rename = smb2_rename_path,
5216         .create_hardlink = smb2_create_hardlink,
5217         .query_symlink = smb2_query_symlink,
5218         .query_mf_symlink = smb3_query_mf_symlink,
5219         .create_mf_symlink = smb3_create_mf_symlink,
5220         .open = smb2_open_file,
5221         .set_fid = smb2_set_fid,
5222         .close = smb2_close_file,
5223         .flush = smb2_flush_file,
5224         .async_readv = smb2_async_readv,
5225         .async_writev = smb2_async_writev,
5226         .sync_read = smb2_sync_read,
5227         .sync_write = smb2_sync_write,
5228         .query_dir_first = smb2_query_dir_first,
5229         .query_dir_next = smb2_query_dir_next,
5230         .close_dir = smb2_close_dir,
5231         .calc_smb_size = smb2_calc_size,
5232         .is_status_pending = smb2_is_status_pending,
5233         .is_session_expired = smb2_is_session_expired,
5234         .oplock_response = smb2_oplock_response,
5235         .queryfs = smb2_queryfs,
5236         .mand_lock = smb2_mand_lock,
5237         .mand_unlock_range = smb2_unlock_range,
5238         .push_mand_locks = smb2_push_mandatory_locks,
5239         .get_lease_key = smb2_get_lease_key,
5240         .set_lease_key = smb2_set_lease_key,
5241         .new_lease_key = smb2_new_lease_key,
5242         .calc_signature = smb2_calc_signature,
5243         .is_read_op = smb21_is_read_op,
5244         .set_oplock_level = smb21_set_oplock_level,
5245         .create_lease_buf = smb2_create_lease_buf,
5246         .parse_lease_buf = smb2_parse_lease_buf,
5247         .copychunk_range = smb2_copychunk_range,
5248         .wp_retry_size = smb2_wp_retry_size,
5249         .dir_needs_close = smb2_dir_needs_close,
5250         .enum_snapshots = smb3_enum_snapshots,
5251         .notify = smb3_notify,
5252         .get_dfs_refer = smb2_get_dfs_refer,
5253         .select_sectype = smb2_select_sectype,
5254 #ifdef CONFIG_CIFS_XATTR
5255         .query_all_EAs = smb2_query_eas,
5256         .set_EA = smb2_set_ea,
5257 #endif /* CIFS_XATTR */
5258         .get_acl = get_smb2_acl,
5259         .get_acl_by_fid = get_smb2_acl_by_fid,
5260         .set_acl = set_smb2_acl,
5261         .next_header = smb2_next_header,
5262         .ioctl_query_info = smb2_ioctl_query_info,
5263         .make_node = smb2_make_node,
5264         .fiemap = smb3_fiemap,
5265         .llseek = smb3_llseek,
5266         .is_status_io_timeout = smb2_is_status_io_timeout,
5267         .is_network_name_deleted = smb2_is_network_name_deleted,
5268 };
5269
5270 struct smb_version_operations smb30_operations = {
5271         .compare_fids = smb2_compare_fids,
5272         .setup_request = smb2_setup_request,
5273         .setup_async_request = smb2_setup_async_request,
5274         .check_receive = smb2_check_receive,
5275         .add_credits = smb2_add_credits,
5276         .set_credits = smb2_set_credits,
5277         .get_credits_field = smb2_get_credits_field,
5278         .get_credits = smb2_get_credits,
5279         .wait_mtu_credits = smb2_wait_mtu_credits,
5280         .adjust_credits = smb2_adjust_credits,
5281         .get_next_mid = smb2_get_next_mid,
5282         .revert_current_mid = smb2_revert_current_mid,
5283         .read_data_offset = smb2_read_data_offset,
5284         .read_data_length = smb2_read_data_length,
5285         .map_error = map_smb2_to_linux_error,
5286         .find_mid = smb2_find_mid,
5287         .check_message = smb2_check_message,
5288         .dump_detail = smb2_dump_detail,
5289         .clear_stats = smb2_clear_stats,
5290         .print_stats = smb2_print_stats,
5291         .dump_share_caps = smb2_dump_share_caps,
5292         .is_oplock_break = smb2_is_valid_oplock_break,
5293         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5294         .downgrade_oplock = smb3_downgrade_oplock,
5295         .need_neg = smb2_need_neg,
5296         .negotiate = smb2_negotiate,
5297         .negotiate_wsize = smb3_negotiate_wsize,
5298         .negotiate_rsize = smb3_negotiate_rsize,
5299         .sess_setup = SMB2_sess_setup,
5300         .logoff = SMB2_logoff,
5301         .tree_connect = SMB2_tcon,
5302         .tree_disconnect = SMB2_tdis,
5303         .qfs_tcon = smb3_qfs_tcon,
5304         .is_path_accessible = smb2_is_path_accessible,
5305         .can_echo = smb2_can_echo,
5306         .echo = SMB2_echo,
5307         .query_path_info = smb2_query_path_info,
5308         /* WSL tags introduced long after smb2.1, enable for SMB3, 3.11 only */
5309         .query_reparse_tag = smb2_query_reparse_tag,
5310         .get_srv_inum = smb2_get_srv_inum,
5311         .query_file_info = smb2_query_file_info,
5312         .set_path_size = smb2_set_path_size,
5313         .set_file_size = smb2_set_file_size,
5314         .set_file_info = smb2_set_file_info,
5315         .set_compression = smb2_set_compression,
5316         .mkdir = smb2_mkdir,
5317         .mkdir_setinfo = smb2_mkdir_setinfo,
5318         .rmdir = smb2_rmdir,
5319         .unlink = smb2_unlink,
5320         .rename = smb2_rename_path,
5321         .create_hardlink = smb2_create_hardlink,
5322         .query_symlink = smb2_query_symlink,
5323         .query_mf_symlink = smb3_query_mf_symlink,
5324         .create_mf_symlink = smb3_create_mf_symlink,
5325         .open = smb2_open_file,
5326         .set_fid = smb2_set_fid,
5327         .close = smb2_close_file,
5328         .close_getattr = smb2_close_getattr,
5329         .flush = smb2_flush_file,
5330         .async_readv = smb2_async_readv,
5331         .async_writev = smb2_async_writev,
5332         .sync_read = smb2_sync_read,
5333         .sync_write = smb2_sync_write,
5334         .query_dir_first = smb2_query_dir_first,
5335         .query_dir_next = smb2_query_dir_next,
5336         .close_dir = smb2_close_dir,
5337         .calc_smb_size = smb2_calc_size,
5338         .is_status_pending = smb2_is_status_pending,
5339         .is_session_expired = smb2_is_session_expired,
5340         .oplock_response = smb2_oplock_response,
5341         .queryfs = smb2_queryfs,
5342         .mand_lock = smb2_mand_lock,
5343         .mand_unlock_range = smb2_unlock_range,
5344         .push_mand_locks = smb2_push_mandatory_locks,
5345         .get_lease_key = smb2_get_lease_key,
5346         .set_lease_key = smb2_set_lease_key,
5347         .new_lease_key = smb2_new_lease_key,
5348         .generate_signingkey = generate_smb30signingkey,
5349         .calc_signature = smb3_calc_signature,
5350         .set_integrity  = smb3_set_integrity,
5351         .is_read_op = smb21_is_read_op,
5352         .set_oplock_level = smb3_set_oplock_level,
5353         .create_lease_buf = smb3_create_lease_buf,
5354         .parse_lease_buf = smb3_parse_lease_buf,
5355         .copychunk_range = smb2_copychunk_range,
5356         .duplicate_extents = smb2_duplicate_extents,
5357         .validate_negotiate = smb3_validate_negotiate,
5358         .wp_retry_size = smb2_wp_retry_size,
5359         .dir_needs_close = smb2_dir_needs_close,
5360         .fallocate = smb3_fallocate,
5361         .enum_snapshots = smb3_enum_snapshots,
5362         .notify = smb3_notify,
5363         .init_transform_rq = smb3_init_transform_rq,
5364         .is_transform_hdr = smb3_is_transform_hdr,
5365         .receive_transform = smb3_receive_transform,
5366         .get_dfs_refer = smb2_get_dfs_refer,
5367         .select_sectype = smb2_select_sectype,
5368 #ifdef CONFIG_CIFS_XATTR
5369         .query_all_EAs = smb2_query_eas,
5370         .set_EA = smb2_set_ea,
5371 #endif /* CIFS_XATTR */
5372         .get_acl = get_smb2_acl,
5373         .get_acl_by_fid = get_smb2_acl_by_fid,
5374         .set_acl = set_smb2_acl,
5375         .next_header = smb2_next_header,
5376         .ioctl_query_info = smb2_ioctl_query_info,
5377         .make_node = smb2_make_node,
5378         .fiemap = smb3_fiemap,
5379         .llseek = smb3_llseek,
5380         .is_status_io_timeout = smb2_is_status_io_timeout,
5381         .is_network_name_deleted = smb2_is_network_name_deleted,
5382 };
5383
5384 struct smb_version_operations smb311_operations = {
5385         .compare_fids = smb2_compare_fids,
5386         .setup_request = smb2_setup_request,
5387         .setup_async_request = smb2_setup_async_request,
5388         .check_receive = smb2_check_receive,
5389         .add_credits = smb2_add_credits,
5390         .set_credits = smb2_set_credits,
5391         .get_credits_field = smb2_get_credits_field,
5392         .get_credits = smb2_get_credits,
5393         .wait_mtu_credits = smb2_wait_mtu_credits,
5394         .adjust_credits = smb2_adjust_credits,
5395         .get_next_mid = smb2_get_next_mid,
5396         .revert_current_mid = smb2_revert_current_mid,
5397         .read_data_offset = smb2_read_data_offset,
5398         .read_data_length = smb2_read_data_length,
5399         .map_error = map_smb2_to_linux_error,
5400         .find_mid = smb2_find_mid,
5401         .check_message = smb2_check_message,
5402         .dump_detail = smb2_dump_detail,
5403         .clear_stats = smb2_clear_stats,
5404         .print_stats = smb2_print_stats,
5405         .dump_share_caps = smb2_dump_share_caps,
5406         .is_oplock_break = smb2_is_valid_oplock_break,
5407         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5408         .downgrade_oplock = smb3_downgrade_oplock,
5409         .need_neg = smb2_need_neg,
5410         .negotiate = smb2_negotiate,
5411         .negotiate_wsize = smb3_negotiate_wsize,
5412         .negotiate_rsize = smb3_negotiate_rsize,
5413         .sess_setup = SMB2_sess_setup,
5414         .logoff = SMB2_logoff,
5415         .tree_connect = SMB2_tcon,
5416         .tree_disconnect = SMB2_tdis,
5417         .qfs_tcon = smb3_qfs_tcon,
5418         .is_path_accessible = smb2_is_path_accessible,
5419         .can_echo = smb2_can_echo,
5420         .echo = SMB2_echo,
5421         .query_path_info = smb2_query_path_info,
5422         .query_reparse_tag = smb2_query_reparse_tag,
5423         .get_srv_inum = smb2_get_srv_inum,
5424         .query_file_info = smb2_query_file_info,
5425         .set_path_size = smb2_set_path_size,
5426         .set_file_size = smb2_set_file_size,
5427         .set_file_info = smb2_set_file_info,
5428         .set_compression = smb2_set_compression,
5429         .mkdir = smb2_mkdir,
5430         .mkdir_setinfo = smb2_mkdir_setinfo,
5431         .posix_mkdir = smb311_posix_mkdir,
5432         .rmdir = smb2_rmdir,
5433         .unlink = smb2_unlink,
5434         .rename = smb2_rename_path,
5435         .create_hardlink = smb2_create_hardlink,
5436         .query_symlink = smb2_query_symlink,
5437         .query_mf_symlink = smb3_query_mf_symlink,
5438         .create_mf_symlink = smb3_create_mf_symlink,
5439         .open = smb2_open_file,
5440         .set_fid = smb2_set_fid,
5441         .close = smb2_close_file,
5442         .close_getattr = smb2_close_getattr,
5443         .flush = smb2_flush_file,
5444         .async_readv = smb2_async_readv,
5445         .async_writev = smb2_async_writev,
5446         .sync_read = smb2_sync_read,
5447         .sync_write = smb2_sync_write,
5448         .query_dir_first = smb2_query_dir_first,
5449         .query_dir_next = smb2_query_dir_next,
5450         .close_dir = smb2_close_dir,
5451         .calc_smb_size = smb2_calc_size,
5452         .is_status_pending = smb2_is_status_pending,
5453         .is_session_expired = smb2_is_session_expired,
5454         .oplock_response = smb2_oplock_response,
5455         .queryfs = smb311_queryfs,
5456         .mand_lock = smb2_mand_lock,
5457         .mand_unlock_range = smb2_unlock_range,
5458         .push_mand_locks = smb2_push_mandatory_locks,
5459         .get_lease_key = smb2_get_lease_key,
5460         .set_lease_key = smb2_set_lease_key,
5461         .new_lease_key = smb2_new_lease_key,
5462         .generate_signingkey = generate_smb311signingkey,
5463         .calc_signature = smb3_calc_signature,
5464         .set_integrity  = smb3_set_integrity,
5465         .is_read_op = smb21_is_read_op,
5466         .set_oplock_level = smb3_set_oplock_level,
5467         .create_lease_buf = smb3_create_lease_buf,
5468         .parse_lease_buf = smb3_parse_lease_buf,
5469         .copychunk_range = smb2_copychunk_range,
5470         .duplicate_extents = smb2_duplicate_extents,
5471 /*      .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
5472         .wp_retry_size = smb2_wp_retry_size,
5473         .dir_needs_close = smb2_dir_needs_close,
5474         .fallocate = smb3_fallocate,
5475         .enum_snapshots = smb3_enum_snapshots,
5476         .notify = smb3_notify,
5477         .init_transform_rq = smb3_init_transform_rq,
5478         .is_transform_hdr = smb3_is_transform_hdr,
5479         .receive_transform = smb3_receive_transform,
5480         .get_dfs_refer = smb2_get_dfs_refer,
5481         .select_sectype = smb2_select_sectype,
5482 #ifdef CONFIG_CIFS_XATTR
5483         .query_all_EAs = smb2_query_eas,
5484         .set_EA = smb2_set_ea,
5485 #endif /* CIFS_XATTR */
5486         .get_acl = get_smb2_acl,
5487         .get_acl_by_fid = get_smb2_acl_by_fid,
5488         .set_acl = set_smb2_acl,
5489         .next_header = smb2_next_header,
5490         .ioctl_query_info = smb2_ioctl_query_info,
5491         .make_node = smb2_make_node,
5492         .fiemap = smb3_fiemap,
5493         .llseek = smb3_llseek,
5494         .is_status_io_timeout = smb2_is_status_io_timeout,
5495         .is_network_name_deleted = smb2_is_network_name_deleted,
5496 };
5497
5498 struct smb_version_values smb20_values = {
5499         .version_string = SMB20_VERSION_STRING,
5500         .protocol_id = SMB20_PROT_ID,
5501         .req_capabilities = 0, /* MBZ */
5502         .large_lock_type = 0,
5503         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5504         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5505         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5506         .header_size = sizeof(struct smb2_sync_hdr),
5507         .header_preamble_size = 0,
5508         .max_header_size = MAX_SMB2_HDR_SIZE,
5509         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5510         .lock_cmd = SMB2_LOCK,
5511         .cap_unix = 0,
5512         .cap_nt_find = SMB2_NT_FIND,
5513         .cap_large_files = SMB2_LARGE_FILES,
5514         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5515         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5516         .create_lease_size = sizeof(struct create_lease),
5517 };
5518
5519 struct smb_version_values smb21_values = {
5520         .version_string = SMB21_VERSION_STRING,
5521         .protocol_id = SMB21_PROT_ID,
5522         .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
5523         .large_lock_type = 0,
5524         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5525         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5526         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5527         .header_size = sizeof(struct smb2_sync_hdr),
5528         .header_preamble_size = 0,
5529         .max_header_size = MAX_SMB2_HDR_SIZE,
5530         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5531         .lock_cmd = SMB2_LOCK,
5532         .cap_unix = 0,
5533         .cap_nt_find = SMB2_NT_FIND,
5534         .cap_large_files = SMB2_LARGE_FILES,
5535         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5536         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5537         .create_lease_size = sizeof(struct create_lease),
5538 };
5539
5540 struct smb_version_values smb3any_values = {
5541         .version_string = SMB3ANY_VERSION_STRING,
5542         .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
5543         .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,
5544         .large_lock_type = 0,
5545         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5546         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5547         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5548         .header_size = sizeof(struct smb2_sync_hdr),
5549         .header_preamble_size = 0,
5550         .max_header_size = MAX_SMB2_HDR_SIZE,
5551         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5552         .lock_cmd = SMB2_LOCK,
5553         .cap_unix = 0,
5554         .cap_nt_find = SMB2_NT_FIND,
5555         .cap_large_files = SMB2_LARGE_FILES,
5556         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5557         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5558         .create_lease_size = sizeof(struct create_lease_v2),
5559 };
5560
5561 struct smb_version_values smbdefault_values = {
5562         .version_string = SMBDEFAULT_VERSION_STRING,
5563         .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
5564         .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,
5565         .large_lock_type = 0,
5566         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5567         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5568         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5569         .header_size = sizeof(struct smb2_sync_hdr),
5570         .header_preamble_size = 0,
5571         .max_header_size = MAX_SMB2_HDR_SIZE,
5572         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5573         .lock_cmd = SMB2_LOCK,
5574         .cap_unix = 0,
5575         .cap_nt_find = SMB2_NT_FIND,
5576         .cap_large_files = SMB2_LARGE_FILES,
5577         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5578         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5579         .create_lease_size = sizeof(struct create_lease_v2),
5580 };
5581
5582 struct smb_version_values smb30_values = {
5583         .version_string = SMB30_VERSION_STRING,
5584         .protocol_id = SMB30_PROT_ID,
5585         .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,
5586         .large_lock_type = 0,
5587         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5588         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5589         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5590         .header_size = sizeof(struct smb2_sync_hdr),
5591         .header_preamble_size = 0,
5592         .max_header_size = MAX_SMB2_HDR_SIZE,
5593         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5594         .lock_cmd = SMB2_LOCK,
5595         .cap_unix = 0,
5596         .cap_nt_find = SMB2_NT_FIND,
5597         .cap_large_files = SMB2_LARGE_FILES,
5598         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5599         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5600         .create_lease_size = sizeof(struct create_lease_v2),
5601 };
5602
5603 struct smb_version_values smb302_values = {
5604         .version_string = SMB302_VERSION_STRING,
5605         .protocol_id = SMB302_PROT_ID,
5606         .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,
5607         .large_lock_type = 0,
5608         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5609         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5610         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5611         .header_size = sizeof(struct smb2_sync_hdr),
5612         .header_preamble_size = 0,
5613         .max_header_size = MAX_SMB2_HDR_SIZE,
5614         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5615         .lock_cmd = SMB2_LOCK,
5616         .cap_unix = 0,
5617         .cap_nt_find = SMB2_NT_FIND,
5618         .cap_large_files = SMB2_LARGE_FILES,
5619         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5620         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5621         .create_lease_size = sizeof(struct create_lease_v2),
5622 };
5623
5624 struct smb_version_values smb311_values = {
5625         .version_string = SMB311_VERSION_STRING,
5626         .protocol_id = SMB311_PROT_ID,
5627         .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,
5628         .large_lock_type = 0,
5629         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5630         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5631         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5632         .header_size = sizeof(struct smb2_sync_hdr),
5633         .header_preamble_size = 0,
5634         .max_header_size = MAX_SMB2_HDR_SIZE,
5635         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5636         .lock_cmd = SMB2_LOCK,
5637         .cap_unix = 0,
5638         .cap_nt_find = SMB2_NT_FIND,
5639         .cap_large_files = SMB2_LARGE_FILES,
5640         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5641         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5642         .create_lease_size = sizeof(struct create_lease_v2),
5643 };