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 <uapi/linux/magic.h>
  17 #include "cifsfs.h"
  18 #include "cifsglob.h"
  19 #include "smb2pdu.h"
  20 #include "smb2proto.h"
  21 #include "cifsproto.h"
  22 #include "cifs_debug.h"
  23 #include "cifs_unicode.h"
  24 #include "smb2status.h"
  25 #include "smb2glob.h"
  26 #include "cifs_ioctl.h"
  27 #include "smbdirect.h"
  28 #include "fscache.h"
  29 #include "fs_context.h"
  30 #include "cached_dir.h"
  31
  32 /* Change credits for different ops and return the total number of credits */
  33 static int
  34 change_conf(struct TCP_Server_Info *server)
  35 {
  36         server->credits += server->echo_credits + server->oplock_credits;
  37         server->oplock_credits = server->echo_credits = 0;
  38         switch (server->credits) {
  39         case 0:
  40                 return 0;
  41         case 1:
  42                 server->echoes = false;
  43                 server->oplocks = false;
  44                 break;
  45         case 2:
  46                 server->echoes = true;
  47                 server->oplocks = false;
  48                 server->echo_credits = 1;
  49                 break;
  50         default:
  51                 server->echoes = true;
  52                 if (enable_oplocks) {
  53                         server->oplocks = true;
  54                         server->oplock_credits = 1;
  55                 } else
  56                         server->oplocks = false;
  57
  58                 server->echo_credits = 1;
  59         }
  60         server->credits -= server->echo_credits + server->oplock_credits;
  61         return server->credits + server->echo_credits + server->oplock_credits;
  62 }
  63
  64 static void
  65 smb2_add_credits(struct TCP_Server_Info *server,
  66                  const struct cifs_credits *credits, const int optype)
  67 {
  68         int *val, rc = -1;
  69         int scredits, in_flight;
  70         unsigned int add = credits->value;
  71         unsigned int instance = credits->instance;
  72         bool reconnect_detected = false;
  73         bool reconnect_with_invalid_credits = false;
  74
  75         spin_lock(&server->req_lock);
  76         val = server->ops->get_credits_field(server, optype);
  77
  78         /* eg found case where write overlapping reconnect messed up credits */
  79         if (((optype & CIFS_OP_MASK) == CIFS_NEG_OP) && (*val != 0))
  80                 reconnect_with_invalid_credits = true;
  81
  82         if ((instance == 0) || (instance == server->reconnect_instance))
  83                 *val += add;
  84         else
  85                 reconnect_detected = true;
  86
  87         if (*val > 65000) {
  88                 *val = 65000; /* Don't get near 64K credits, avoid srv bugs */
  89                 pr_warn_once("server overflowed SMB3 credits\n");
  90                 trace_smb3_overflow_credits(server->CurrentMid,
  91                                             server->conn_id, server->hostname, *val,
  92                                             add, server->in_flight);
  93         }
  94         server->in_flight--;
  95         if (server->in_flight == 0 &&
  96            ((optype & CIFS_OP_MASK) != CIFS_NEG_OP) &&
  97            ((optype & CIFS_OP_MASK) != CIFS_SESS_OP))
  98                 rc = change_conf(server);
  99         /*
 100          * Sometimes server returns 0 credits on oplock break ack - we need to
 101          * rebalance credits in this case.
 102          */
 103         else if (server->in_flight > 0 && server->oplock_credits == 0 &&
 104                  server->oplocks) {
 105                 if (server->credits > 1) {
 106                         server->credits--;
 107                         server->oplock_credits++;
 108                 }
 109         }
 110         scredits = *val;
 111         in_flight = server->in_flight;
 112         spin_unlock(&server->req_lock);
 113         wake_up(&server->request_q);
 114
 115         if (reconnect_detected) {
 116                 trace_smb3_reconnect_detected(server->CurrentMid,
 117                         server->conn_id, server->hostname, scredits, add, in_flight);
 118
 119                 cifs_dbg(FYI, "trying to put %d credits from the old server instance %d\n",
 120                          add, instance);
 121         }
 122
 123         if (reconnect_with_invalid_credits) {
 124                 trace_smb3_reconnect_with_invalid_credits(server->CurrentMid,
 125                         server->conn_id, server->hostname, scredits, add, in_flight);
 126                 cifs_dbg(FYI, "Negotiate operation when server credits is non-zero. Optype: %d, server credits: %d, credits added: %d\n",
 127                          optype, scredits, add);
 128         }
 129
 130         spin_lock(&server->srv_lock);
 131         if (server->tcpStatus == CifsNeedReconnect
 132             || server->tcpStatus == CifsExiting) {
 133                 spin_unlock(&server->srv_lock);
 134                 return;
 135         }
 136         spin_unlock(&server->srv_lock);
 137
 138         switch (rc) {
 139         case -1:
 140                 /* change_conf hasn't been executed */
 141                 break;
 142         case 0:
 143                 cifs_server_dbg(VFS, "Possible client or server bug - zero credits\n");
 144                 break;
 145         case 1:
 146                 cifs_server_dbg(VFS, "disabling echoes and oplocks\n");
 147                 break;
 148         case 2:
 149                 cifs_dbg(FYI, "disabling oplocks\n");
 150                 break;
 151         default:
 152                 /* change_conf rebalanced credits for different types */
 153                 break;
 154         }
 155
 156         trace_smb3_add_credits(server->CurrentMid,
 157                         server->conn_id, server->hostname, scredits, add, in_flight);
 158         cifs_dbg(FYI, "%s: added %u credits total=%d\n", __func__, add, scredits);
 159 }
 160
 161 static void
 162 smb2_set_credits(struct TCP_Server_Info *server, const int val)
 163 {
 164         int scredits, in_flight;
 165
 166         spin_lock(&server->req_lock);
 167         server->credits = val;
 168         if (val == 1)
 169                 server->reconnect_instance++;
 170         scredits = server->credits;
 171         in_flight = server->in_flight;
 172         spin_unlock(&server->req_lock);
 173
 174         trace_smb3_set_credits(server->CurrentMid,
 175                         server->conn_id, server->hostname, scredits, val, in_flight);
 176         cifs_dbg(FYI, "%s: set %u credits\n", __func__, val);
 177
 178         /* don't log while holding the lock */
 179         if (val == 1)
 180                 cifs_dbg(FYI, "set credits to 1 due to smb2 reconnect\n");
 181 }
 182
 183 static int *
 184 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
 185 {
 186         switch (optype) {
 187         case CIFS_ECHO_OP:
 188                 return &server->echo_credits;
 189         case CIFS_OBREAK_OP:
 190                 return &server->oplock_credits;
 191         default:
 192                 return &server->credits;
 193         }
 194 }
 195
 196 static unsigned int
 197 smb2_get_credits(struct mid_q_entry *mid)
 198 {
 199         return mid->credits_received;
 200 }
 201
 202 static int
 203 smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
 204                       unsigned int *num, struct cifs_credits *credits)
 205 {
 206         int rc = 0;
 207         unsigned int scredits, in_flight;
 208
 209         spin_lock(&server->req_lock);
 210         while (1) {
 211                 if (server->credits <= 0) {
 212                         spin_unlock(&server->req_lock);
 213                         cifs_num_waiters_inc(server);
 214                         rc = wait_event_killable(server->request_q,
 215                                 has_credits(server, &server->credits, 1));
 216                         cifs_num_waiters_dec(server);
 217                         if (rc)
 218                                 return rc;
 219                         spin_lock(&server->req_lock);
 220                 } else {
 221                         spin_unlock(&server->req_lock);
 222                         spin_lock(&server->srv_lock);
 223                         if (server->tcpStatus == CifsExiting) {
 224                                 spin_unlock(&server->srv_lock);
 225                                 return -ENOENT;
 226                         }
 227                         spin_unlock(&server->srv_lock);
 228
 229                         spin_lock(&server->req_lock);
 230                         scredits = server->credits;
 231                         /* can deadlock with reopen */
 232                         if (scredits <= 8) {
 233                                 *num = SMB2_MAX_BUFFER_SIZE;
 234                                 credits->value = 0;
 235                                 credits->instance = 0;
 236                                 break;
 237                         }
 238
 239                         /* leave some credits for reopen and other ops */
 240                         scredits -= 8;
 241                         *num = min_t(unsigned int, size,
 242                                      scredits * SMB2_MAX_BUFFER_SIZE);
 243
 244                         credits->value =
 245                                 DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE);
 246                         credits->instance = server->reconnect_instance;
 247                         server->credits -= credits->value;
 248                         server->in_flight++;
 249                         if (server->in_flight > server->max_in_flight)
 250                                 server->max_in_flight = server->in_flight;
 251                         break;
 252                 }
 253         }
 254         scredits = server->credits;
 255         in_flight = server->in_flight;
 256         spin_unlock(&server->req_lock);
 257
 258         trace_smb3_wait_credits(server->CurrentMid,
 259                         server->conn_id, server->hostname, scredits, -(credits->value), in_flight);
 260         cifs_dbg(FYI, "%s: removed %u credits total=%d\n",
 261                         __func__, credits->value, scredits);
 262
 263         return rc;
 264 }
 265
 266 static int
 267 smb2_adjust_credits(struct TCP_Server_Info *server,
 268                     struct cifs_credits *credits,
 269                     const unsigned int payload_size)
 270 {
 271         int new_val = DIV_ROUND_UP(payload_size, SMB2_MAX_BUFFER_SIZE);
 272         int scredits, in_flight;
 273
 274         if (!credits->value || credits->value == new_val)
 275                 return 0;
 276
 277         if (credits->value < new_val) {
 278                 trace_smb3_too_many_credits(server->CurrentMid,
 279                                 server->conn_id, server->hostname, 0, credits->value - new_val, 0);
 280                 cifs_server_dbg(VFS, "request has less credits (%d) than required (%d)",
 281                                 credits->value, new_val);
 282
 283                 return -ENOTSUPP;
 284         }
 285
 286         spin_lock(&server->req_lock);
 287
 288         if (server->reconnect_instance != credits->instance) {
 289                 scredits = server->credits;
 290                 in_flight = server->in_flight;
 291                 spin_unlock(&server->req_lock);
 292
 293                 trace_smb3_reconnect_detected(server->CurrentMid,
 294                         server->conn_id, server->hostname, scredits,
 295                         credits->value - new_val, in_flight);
 296                 cifs_server_dbg(VFS, "trying to return %d credits to old session\n",
 297                          credits->value - new_val);
 298                 return -EAGAIN;
 299         }
 300
 301         server->credits += credits->value - new_val;
 302         scredits = server->credits;
 303         in_flight = server->in_flight;
 304         spin_unlock(&server->req_lock);
 305         wake_up(&server->request_q);
 306
 307         trace_smb3_adj_credits(server->CurrentMid,
 308                         server->conn_id, server->hostname, scredits,
 309                         credits->value - new_val, in_flight);
 310         cifs_dbg(FYI, "%s: adjust added %u credits total=%d\n",
 311                         __func__, credits->value - new_val, scredits);
 312
 313         credits->value = new_val;
 314
 315         return 0;
 316 }
 317
 318 static __u64
 319 smb2_get_next_mid(struct TCP_Server_Info *server)
 320 {
 321         __u64 mid;
 322         /* for SMB2 we need the current value */
 323         spin_lock(&server->mid_lock);
 324         mid = server->CurrentMid++;
 325         spin_unlock(&server->mid_lock);
 326         return mid;
 327 }
 328
 329 static void
 330 smb2_revert_current_mid(struct TCP_Server_Info *server, const unsigned int val)
 331 {
 332         spin_lock(&server->mid_lock);
 333         if (server->CurrentMid >= val)
 334                 server->CurrentMid -= val;
 335         spin_unlock(&server->mid_lock);
 336 }
 337
 338 static struct mid_q_entry *
 339 __smb2_find_mid(struct TCP_Server_Info *server, char *buf, bool dequeue)
 340 {
 341         struct mid_q_entry *mid;
 342         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
 343         __u64 wire_mid = le64_to_cpu(shdr->MessageId);
 344
 345         if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
 346                 cifs_server_dbg(VFS, "Encrypted frame parsing not supported yet\n");
 347                 return NULL;
 348         }
 349
 350         spin_lock(&server->mid_lock);
 351         list_for_each_entry(mid, &server->pending_mid_q, qhead) {
 352                 if ((mid->mid == wire_mid) &&
 353                     (mid->mid_state == MID_REQUEST_SUBMITTED) &&
 354                     (mid->command == shdr->Command)) {
 355                         kref_get(&mid->refcount);
 356                         if (dequeue) {
 357                                 list_del_init(&mid->qhead);
 358                                 mid->mid_flags |= MID_DELETED;
 359                         }
 360                         spin_unlock(&server->mid_lock);
 361                         return mid;
 362                 }
 363         }
 364         spin_unlock(&server->mid_lock);
 365         return NULL;
 366 }
 367
 368 static struct mid_q_entry *
 369 smb2_find_mid(struct TCP_Server_Info *server, char *buf)
 370 {
 371         return __smb2_find_mid(server, buf, false);
 372 }
 373
 374 static struct mid_q_entry *
 375 smb2_find_dequeue_mid(struct TCP_Server_Info *server, char *buf)
 376 {
 377         return __smb2_find_mid(server, buf, true);
 378 }
 379
 380 static void
 381 smb2_dump_detail(void *buf, struct TCP_Server_Info *server)
 382 {
 383 #ifdef CONFIG_CIFS_DEBUG2
 384         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
 385
 386         cifs_server_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
 387                  shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId,
 388                  shdr->Id.SyncId.ProcessId);
 389         cifs_server_dbg(VFS, "smb buf %p len %u\n", buf,
 390                  server->ops->calc_smb_size(buf));
 391 #endif
 392 }
 393
 394 static bool
 395 smb2_need_neg(struct TCP_Server_Info *server)
 396 {
 397         return server->max_read == 0;
 398 }
 399
 400 static int
 401 smb2_negotiate(const unsigned int xid,
 402                struct cifs_ses *ses,
 403                struct TCP_Server_Info *server)
 404 {
 405         int rc;
 406
 407         spin_lock(&server->mid_lock);
 408         server->CurrentMid = 0;
 409         spin_unlock(&server->mid_lock);
 410         rc = SMB2_negotiate(xid, ses, server);
 411         /* BB we probably don't need to retry with modern servers */
 412         if (rc == -EAGAIN)
 413                 rc = -EHOSTDOWN;
 414         return rc;
 415 }
 416
 417 static unsigned int
 418 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
 419 {
 420         struct TCP_Server_Info *server = tcon->ses->server;
 421         unsigned int wsize;
 422
 423         /* start with specified wsize, or default */
 424         wsize = ctx->wsize ? ctx->wsize : CIFS_DEFAULT_IOSIZE;
 425         wsize = min_t(unsigned int, wsize, server->max_write);
 426         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 427                 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
 428
 429         return wsize;
 430 }
 431
 432 static unsigned int
 433 smb3_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
 434 {
 435         struct TCP_Server_Info *server = tcon->ses->server;
 436         unsigned int wsize;
 437
 438         /* start with specified wsize, or default */
 439         wsize = ctx->wsize ? ctx->wsize : SMB3_DEFAULT_IOSIZE;
 440         wsize = min_t(unsigned int, wsize, server->max_write);
 441 #ifdef CONFIG_CIFS_SMB_DIRECT
 442         if (server->rdma) {
 443                 if (server->sign)
 444                         /*
 445                          * Account for SMB2 data transfer packet header and
 446                          * possible encryption header
 447                          */
 448                         wsize = min_t(unsigned int,
 449                                 wsize,
 450                                 server->smbd_conn->max_fragmented_send_size -
 451                                         SMB2_READWRITE_PDU_HEADER_SIZE -
 452                                         sizeof(struct smb2_transform_hdr));
 453                 else
 454                         wsize = min_t(unsigned int,
 455                                 wsize, server->smbd_conn->max_readwrite_size);
 456         }
 457 #endif
 458         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 459                 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
 460
 461         return wsize;
 462 }
 463
 464 static unsigned int
 465 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
 466 {
 467         struct TCP_Server_Info *server = tcon->ses->server;
 468         unsigned int rsize;
 469
 470         /* start with specified rsize, or default */
 471         rsize = ctx->rsize ? ctx->rsize : CIFS_DEFAULT_IOSIZE;
 472         rsize = min_t(unsigned int, rsize, server->max_read);
 473
 474         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 475                 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
 476
 477         return rsize;
 478 }
 479
 480 static unsigned int
 481 smb3_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
 482 {
 483         struct TCP_Server_Info *server = tcon->ses->server;
 484         unsigned int rsize;
 485
 486         /* start with specified rsize, or default */
 487         rsize = ctx->rsize ? ctx->rsize : SMB3_DEFAULT_IOSIZE;
 488         rsize = min_t(unsigned int, rsize, server->max_read);
 489 #ifdef CONFIG_CIFS_SMB_DIRECT
 490         if (server->rdma) {
 491                 if (server->sign)
 492                         /*
 493                          * Account for SMB2 data transfer packet header and
 494                          * possible encryption header
 495                          */
 496                         rsize = min_t(unsigned int,
 497                                 rsize,
 498                                 server->smbd_conn->max_fragmented_recv_size -
 499                                         SMB2_READWRITE_PDU_HEADER_SIZE -
 500                                         sizeof(struct smb2_transform_hdr));
 501                 else
 502                         rsize = min_t(unsigned int,
 503                                 rsize, server->smbd_conn->max_readwrite_size);
 504         }
 505 #endif
 506
 507         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 508                 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
 509
 510         return rsize;
 511 }
 512
 513 static int
 514 parse_server_interfaces(struct network_interface_info_ioctl_rsp *buf,
 515                         size_t buf_len, struct cifs_ses *ses, bool in_mount)
 516 {
 517         struct network_interface_info_ioctl_rsp *p;
 518         struct sockaddr_in *addr4;
 519         struct sockaddr_in6 *addr6;
 520         struct iface_info_ipv4 *p4;
 521         struct iface_info_ipv6 *p6;
 522         struct cifs_server_iface *info = NULL, *iface = NULL, *niface = NULL;
 523         struct cifs_server_iface tmp_iface;
 524         ssize_t bytes_left;
 525         size_t next = 0;
 526         int nb_iface = 0;
 527         int rc = 0, ret = 0;
 528
 529         bytes_left = buf_len;
 530         p = buf;
 531
 532         spin_lock(&ses->iface_lock);
 533         /*
 534          * Go through iface_list and do kref_put to remove
 535          * any unused ifaces. ifaces in use will be removed
 536          * when the last user calls a kref_put on it
 537          */
 538         list_for_each_entry_safe(iface, niface, &ses->iface_list,
 539                                  iface_head) {
 540                 iface->is_active = 0;
 541                 kref_put(&iface->refcount, release_iface);
 542                 ses->iface_count--;
 543         }
 544         spin_unlock(&ses->iface_lock);
 545
 546         /*
 547          * Samba server e.g. can return an empty interface list in some cases,
 548          * which would only be a problem if we were requesting multichannel
 549          */
 550         if (bytes_left == 0) {
 551                 /* avoid spamming logs every 10 minutes, so log only in mount */
 552                 if ((ses->chan_max > 1) && in_mount)
 553                         cifs_dbg(VFS,
 554                                  "multichannel not available\n"
 555                                  "Empty network interface list returned by server %s\n",
 556                                  ses->server->hostname);
 557                 rc = -EINVAL;
 558                 goto out;
 559         }
 560
 561         while (bytes_left >= sizeof(*p)) {
 562                 memset(&tmp_iface, 0, sizeof(tmp_iface));
 563                 tmp_iface.speed = le64_to_cpu(p->LinkSpeed);
 564                 tmp_iface.rdma_capable = le32_to_cpu(p->Capability & RDMA_CAPABLE) ? 1 : 0;
 565                 tmp_iface.rss_capable = le32_to_cpu(p->Capability & RSS_CAPABLE) ? 1 : 0;
 566
 567                 switch (p->Family) {
 568                 /*
 569                  * The kernel and wire socket structures have the same
 570                  * layout and use network byte order but make the
 571                  * conversion explicit in case either one changes.
 572                  */
 573                 case INTERNETWORK:
 574                         addr4 = (struct sockaddr_in *)&tmp_iface.sockaddr;
 575                         p4 = (struct iface_info_ipv4 *)p->Buffer;
 576                         addr4->sin_family = AF_INET;
 577                         memcpy(&addr4->sin_addr, &p4->IPv4Address, 4);
 578
 579                         /* [MS-SMB2] 2.2.32.5.1.1 Clients MUST ignore these */
 580                         addr4->sin_port = cpu_to_be16(CIFS_PORT);
 581
 582                         cifs_dbg(FYI, "%s: ipv4 %pI4\n", __func__,
 583                                  &addr4->sin_addr);
 584                         break;
 585                 case INTERNETWORKV6:
 586                         addr6 = (struct sockaddr_in6 *)&tmp_iface.sockaddr;
 587                         p6 = (struct iface_info_ipv6 *)p->Buffer;
 588                         addr6->sin6_family = AF_INET6;
 589                         memcpy(&addr6->sin6_addr, &p6->IPv6Address, 16);
 590
 591                         /* [MS-SMB2] 2.2.32.5.1.2 Clients MUST ignore these */
 592                         addr6->sin6_flowinfo = 0;
 593                         addr6->sin6_scope_id = 0;
 594                         addr6->sin6_port = cpu_to_be16(CIFS_PORT);
 595
 596                         cifs_dbg(FYI, "%s: ipv6 %pI6\n", __func__,
 597                                  &addr6->sin6_addr);
 598                         break;
 599                 default:
 600                         cifs_dbg(VFS,
 601                                  "%s: skipping unsupported socket family\n",
 602                                  __func__);
 603                         goto next_iface;
 604                 }
 605
 606                 /*
 607                  * The iface_list is assumed to be sorted by speed.
 608                  * Check if the new interface exists in that list.
 609                  * NEVER change iface. it could be in use.
 610                  * Add a new one instead
 611                  */
 612                 spin_lock(&ses->iface_lock);
 613                 iface = niface = NULL;
 614                 list_for_each_entry_safe(iface, niface, &ses->iface_list,
 615                                          iface_head) {
 616                         ret = iface_cmp(iface, &tmp_iface);
 617                         if (!ret) {
 618                                 /* just get a ref so that it doesn't get picked/freed */
 619                                 iface->is_active = 1;
 620                                 kref_get(&iface->refcount);
 621                                 ses->iface_count++;
 622                                 spin_unlock(&ses->iface_lock);
 623                                 goto next_iface;
 624                         } else if (ret < 0) {
 625                                 /* all remaining ifaces are slower */
 626                                 kref_get(&iface->refcount);
 627                                 break;
 628                         }
 629                 }
 630                 spin_unlock(&ses->iface_lock);
 631
 632                 /* no match. insert the entry in the list */
 633                 info = kmalloc(sizeof(struct cifs_server_iface),
 634                                GFP_KERNEL);
 635                 if (!info) {
 636                         rc = -ENOMEM;
 637                         goto out;
 638                 }
 639                 memcpy(info, &tmp_iface, sizeof(tmp_iface));
 640
 641                 /* add this new entry to the list */
 642                 kref_init(&info->refcount);
 643                 info->is_active = 1;
 644
 645                 cifs_dbg(FYI, "%s: adding iface %zu\n", __func__, ses->iface_count);
 646                 cifs_dbg(FYI, "%s: speed %zu bps\n", __func__, info->speed);
 647                 cifs_dbg(FYI, "%s: capabilities 0x%08x\n", __func__,
 648                          le32_to_cpu(p->Capability));
 649
 650                 spin_lock(&ses->iface_lock);
 651                 if (!list_entry_is_head(iface, &ses->iface_list, iface_head)) {
 652                         list_add_tail(&info->iface_head, &iface->iface_head);
 653                         kref_put(&iface->refcount, release_iface);
 654                 } else
 655                         list_add_tail(&info->iface_head, &ses->iface_list);
 656
 657                 ses->iface_count++;
 658                 spin_unlock(&ses->iface_lock);
 659                 ses->iface_last_update = jiffies;
 660 next_iface:
 661                 nb_iface++;
 662                 next = le32_to_cpu(p->Next);
 663                 if (!next) {
 664                         bytes_left -= sizeof(*p);
 665                         break;
 666                 }
 667                 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
 668                 bytes_left -= next;
 669         }
 670
 671         if (!nb_iface) {
 672                 cifs_dbg(VFS, "%s: malformed interface info\n", __func__);
 673                 rc = -EINVAL;
 674                 goto out;
 675         }
 676
 677         /* Azure rounds the buffer size up 8, to a 16 byte boundary */
 678         if ((bytes_left > 8) || p->Next)
 679                 cifs_dbg(VFS, "%s: incomplete interface info\n", __func__);
 680
 681
 682         if (!ses->iface_count) {
 683                 rc = -EINVAL;
 684                 goto out;
 685         }
 686
 687 out:
 688         return rc;
 689 }
 690
 691 int
 692 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon, bool in_mount)
 693 {
 694         int rc;
 695         unsigned int ret_data_len = 0;
 696         struct network_interface_info_ioctl_rsp *out_buf = NULL;
 697         struct cifs_ses *ses = tcon->ses;
 698
 699         rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
 700                         FSCTL_QUERY_NETWORK_INTERFACE_INFO,
 701                         NULL /* no data input */, 0 /* no data input */,
 702                         CIFSMaxBufSize, (char **)&out_buf, &ret_data_len);
 703         if (rc == -EOPNOTSUPP) {
 704                 cifs_dbg(FYI,
 705                          "server does not support query network interfaces\n");
 706                 goto out;
 707         } else if (rc != 0) {
 708                 cifs_tcon_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
 709                 goto out;
 710         }
 711
 712         rc = parse_server_interfaces(out_buf, ret_data_len, ses, in_mount);
 713         if (rc)
 714                 goto out;
 715
 716 out:
 717         kfree(out_buf);
 718         return rc;
 719 }
 720
 721 static void
 722 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
 723               struct cifs_sb_info *cifs_sb)
 724 {
 725         int rc;
 726         __le16 srch_path = 0; /* Null - open root of share */
 727         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 728         struct cifs_open_parms oparms;
 729         struct cifs_fid fid;
 730         struct cached_fid *cfid = NULL;
 731
 732         oparms.tcon = tcon;
 733         oparms.desired_access = FILE_READ_ATTRIBUTES;
 734         oparms.disposition = FILE_OPEN;
 735         oparms.create_options = cifs_create_options(cifs_sb, 0);
 736         oparms.fid = &fid;
 737         oparms.reconnect = false;
 738
 739         rc = open_cached_dir(xid, tcon, "", cifs_sb, false, &cfid);
 740         if (rc == 0)
 741                 memcpy(&fid, &cfid->fid, sizeof(struct cifs_fid));
 742         else
 743                 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
 744                                NULL, NULL);
 745         if (rc)
 746                 return;
 747
 748         SMB3_request_interfaces(xid, tcon, true /* called during  mount */);
 749
 750         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 751                         FS_ATTRIBUTE_INFORMATION);
 752         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 753                         FS_DEVICE_INFORMATION);
 754         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 755                         FS_VOLUME_INFORMATION);
 756         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 757                         FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
 758         if (cfid == NULL)
 759                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 760         else
 761                 close_cached_dir(cfid);
 762 }
 763
 764 static void
 765 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
 766               struct cifs_sb_info *cifs_sb)
 767 {
 768         int rc;
 769         __le16 srch_path = 0; /* Null - open root of share */
 770         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 771         struct cifs_open_parms oparms;
 772         struct cifs_fid fid;
 773
 774         oparms.tcon = tcon;
 775         oparms.desired_access = FILE_READ_ATTRIBUTES;
 776         oparms.disposition = FILE_OPEN;
 777         oparms.create_options = cifs_create_options(cifs_sb, 0);
 778         oparms.fid = &fid;
 779         oparms.reconnect = false;
 780
 781         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
 782                        NULL, NULL);
 783         if (rc)
 784                 return;
 785
 786         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 787                         FS_ATTRIBUTE_INFORMATION);
 788         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 789                         FS_DEVICE_INFORMATION);
 790         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 791 }
 792
 793 static int
 794 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
 795                         struct cifs_sb_info *cifs_sb, const char *full_path)
 796 {
 797         int rc;
 798         __le16 *utf16_path;
 799         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 800         int err_buftype = CIFS_NO_BUFFER;
 801         struct cifs_open_parms oparms;
 802         struct kvec err_iov = {};
 803         struct cifs_fid fid;
 804         struct cached_fid *cfid;
 805
 806         rc = open_cached_dir(xid, tcon, full_path, cifs_sb, true, &cfid);
 807         if (!rc) {
 808                 if (cfid->has_lease) {
 809                         close_cached_dir(cfid);
 810                         return 0;
 811                 }
 812                 close_cached_dir(cfid);
 813         }
 814
 815         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
 816         if (!utf16_path)
 817                 return -ENOMEM;
 818
 819         oparms.tcon = tcon;
 820         oparms.desired_access = FILE_READ_ATTRIBUTES;
 821         oparms.disposition = FILE_OPEN;
 822         oparms.create_options = cifs_create_options(cifs_sb, 0);
 823         oparms.fid = &fid;
 824         oparms.reconnect = false;
 825
 826         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL,
 827                        &err_iov, &err_buftype);
 828         if (rc) {
 829                 struct smb2_hdr *hdr = err_iov.iov_base;
 830
 831                 if (unlikely(!hdr || err_buftype == CIFS_NO_BUFFER))
 832                         goto out;
 833                 /*
 834                  * Handle weird Windows SMB server behaviour. It responds with
 835                  * STATUS_OBJECT_NAME_INVALID code to SMB2 QUERY_INFO request
 836                  * for "\<server>\<dfsname>\<linkpath>" DFS reference,
 837                  * where <dfsname> contains non-ASCII unicode symbols.
 838                  */
 839                 if (rc != -EREMOTE && IS_ENABLED(CONFIG_CIFS_DFS_UPCALL) &&
 840                     hdr->Status == STATUS_OBJECT_NAME_INVALID)
 841                         rc = -EREMOTE;
 842                 if (rc == -EREMOTE && IS_ENABLED(CONFIG_CIFS_DFS_UPCALL) && cifs_sb &&
 843                     (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_DFS))
 844                         rc = -EOPNOTSUPP;
 845                 goto out;
 846         }
 847
 848         rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 849
 850 out:
 851         free_rsp_buf(err_buftype, err_iov.iov_base);
 852         kfree(utf16_path);
 853         return rc;
 854 }
 855
 856 static int smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
 857                              struct cifs_sb_info *cifs_sb, const char *full_path,
 858                              u64 *uniqueid, struct cifs_open_info_data *data)
 859 {
 860         *uniqueid = le64_to_cpu(data->fi.IndexNumber);
 861         return 0;
 862 }
 863
 864 static int smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
 865                                 struct cifsFileInfo *cfile, struct cifs_open_info_data *data)
 866 {
 867         struct cifs_fid *fid = &cfile->fid;
 868
 869         if (cfile->symlink_target) {
 870                 data->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL);
 871                 if (!data->symlink_target)
 872                         return -ENOMEM;
 873         }
 874         return SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid, &data->fi);
 875 }
 876
 877 #ifdef CONFIG_CIFS_XATTR
 878 static ssize_t
 879 move_smb2_ea_to_cifs(char *dst, size_t dst_size,
 880                      struct smb2_file_full_ea_info *src, size_t src_size,
 881                      const unsigned char *ea_name)
 882 {
 883         int rc = 0;
 884         unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0;
 885         char *name, *value;
 886         size_t buf_size = dst_size;
 887         size_t name_len, value_len, user_name_len;
 888
 889         while (src_size > 0) {
 890                 name_len = (size_t)src->ea_name_length;
 891                 value_len = (size_t)le16_to_cpu(src->ea_value_length);
 892
 893                 if (name_len == 0)
 894                         break;
 895
 896                 if (src_size < 8 + name_len + 1 + value_len) {
 897                         cifs_dbg(FYI, "EA entry goes beyond length of list\n");
 898                         rc = -EIO;
 899                         goto out;
 900                 }
 901
 902                 name = &src->ea_data[0];
 903                 value = &src->ea_data[src->ea_name_length + 1];
 904
 905                 if (ea_name) {
 906                         if (ea_name_len == name_len &&
 907                             memcmp(ea_name, name, name_len) == 0) {
 908                                 rc = value_len;
 909                                 if (dst_size == 0)
 910                                         goto out;
 911                                 if (dst_size < value_len) {
 912                                         rc = -ERANGE;
 913                                         goto out;
 914                                 }
 915                                 memcpy(dst, value, value_len);
 916                                 goto out;
 917                         }
 918                 } else {
 919                         /* 'user.' plus a terminating null */
 920                         user_name_len = 5 + 1 + name_len;
 921
 922                         if (buf_size == 0) {
 923                                 /* skip copy - calc size only */
 924                                 rc += user_name_len;
 925                         } else if (dst_size >= user_name_len) {
 926                                 dst_size -= user_name_len;
 927                                 memcpy(dst, "user.", 5);
 928                                 dst += 5;
 929                                 memcpy(dst, src->ea_data, name_len);
 930                                 dst += name_len;
 931                                 *dst = 0;
 932                                 ++dst;
 933                                 rc += user_name_len;
 934                         } else {
 935                                 /* stop before overrun buffer */
 936                                 rc = -ERANGE;
 937                                 break;
 938                         }
 939                 }
 940
 941                 if (!src->next_entry_offset)
 942                         break;
 943
 944                 if (src_size < le32_to_cpu(src->next_entry_offset)) {
 945                         /* stop before overrun buffer */
 946                         rc = -ERANGE;
 947                         break;
 948                 }
 949                 src_size -= le32_to_cpu(src->next_entry_offset);
 950                 src = (void *)((char *)src +
 951                                le32_to_cpu(src->next_entry_offset));
 952         }
 953
 954         /* didn't find the named attribute */
 955         if (ea_name)
 956                 rc = -ENODATA;
 957
 958 out:
 959         return (ssize_t)rc;
 960 }
 961
 962 static ssize_t
 963 smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
 964                const unsigned char *path, const unsigned char *ea_name,
 965                char *ea_data, size_t buf_size,
 966                struct cifs_sb_info *cifs_sb)
 967 {
 968         int rc;
 969         struct kvec rsp_iov = {NULL, 0};
 970         int buftype = CIFS_NO_BUFFER;
 971         struct smb2_query_info_rsp *rsp;
 972         struct smb2_file_full_ea_info *info = NULL;
 973
 974         rc = smb2_query_info_compound(xid, tcon, path,
 975                                       FILE_READ_EA,
 976                                       FILE_FULL_EA_INFORMATION,
 977                                       SMB2_O_INFO_FILE,
 978                                       CIFSMaxBufSize -
 979                                       MAX_SMB2_CREATE_RESPONSE_SIZE -
 980                                       MAX_SMB2_CLOSE_RESPONSE_SIZE,
 981                                       &rsp_iov, &buftype, cifs_sb);
 982         if (rc) {
 983                 /*
 984                  * If ea_name is NULL (listxattr) and there are no EAs,
 985                  * return 0 as it's not an error. Otherwise, the specified
 986                  * ea_name was not found.
 987                  */
 988                 if (!ea_name && rc == -ENODATA)
 989                         rc = 0;
 990                 goto qeas_exit;
 991         }
 992
 993         rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
 994         rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
 995                                le32_to_cpu(rsp->OutputBufferLength),
 996                                &rsp_iov,
 997                                sizeof(struct smb2_file_full_ea_info));
 998         if (rc)
 999                 goto qeas_exit;
1000
1001         info = (struct smb2_file_full_ea_info *)(
1002                         le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
1003         rc = move_smb2_ea_to_cifs(ea_data, buf_size, info,
1004                         le32_to_cpu(rsp->OutputBufferLength), ea_name);
1005
1006  qeas_exit:
1007         free_rsp_buf(buftype, rsp_iov.iov_base);
1008         return rc;
1009 }
1010
1011
1012 static int
1013 smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
1014             const char *path, const char *ea_name, const void *ea_value,
1015             const __u16 ea_value_len, const struct nls_table *nls_codepage,
1016             struct cifs_sb_info *cifs_sb)
1017 {
1018         struct cifs_ses *ses = tcon->ses;
1019         struct TCP_Server_Info *server = cifs_pick_channel(ses);
1020         __le16 *utf16_path = NULL;
1021         int ea_name_len = strlen(ea_name);
1022         int flags = CIFS_CP_CREATE_CLOSE_OP;
1023         int len;
1024         struct smb_rqst rqst[3];
1025         int resp_buftype[3];
1026         struct kvec rsp_iov[3];
1027         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
1028         struct cifs_open_parms oparms;
1029         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1030         struct cifs_fid fid;
1031         struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE];
1032         unsigned int size[1];
1033         void *data[1];
1034         struct smb2_file_full_ea_info *ea = NULL;
1035         struct kvec close_iov[1];
1036         struct smb2_query_info_rsp *rsp;
1037         int rc, used_len = 0;
1038
1039         if (smb3_encryption_required(tcon))
1040                 flags |= CIFS_TRANSFORM_REQ;
1041
1042         if (ea_name_len > 255)
1043                 return -EINVAL;
1044
1045         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1046         if (!utf16_path)
1047                 return -ENOMEM;
1048
1049         memset(rqst, 0, sizeof(rqst));
1050         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1051         memset(rsp_iov, 0, sizeof(rsp_iov));
1052
1053         if (ses->server->ops->query_all_EAs) {
1054                 if (!ea_value) {
1055                         rc = ses->server->ops->query_all_EAs(xid, tcon, path,
1056                                                              ea_name, NULL, 0,
1057                                                              cifs_sb);
1058                         if (rc == -ENODATA)
1059                                 goto sea_exit;
1060                 } else {
1061                         /* If we are adding a attribute we should first check
1062                          * if there will be enough space available to store
1063                          * the new EA. If not we should not add it since we
1064                          * would not be able to even read the EAs back.
1065                          */
1066                         rc = smb2_query_info_compound(xid, tcon, path,
1067                                       FILE_READ_EA,
1068                                       FILE_FULL_EA_INFORMATION,
1069                                       SMB2_O_INFO_FILE,
1070                                       CIFSMaxBufSize -
1071                                       MAX_SMB2_CREATE_RESPONSE_SIZE -
1072                                       MAX_SMB2_CLOSE_RESPONSE_SIZE,
1073                                       &rsp_iov[1], &resp_buftype[1], cifs_sb);
1074                         if (rc == 0) {
1075                                 rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1076                                 used_len = le32_to_cpu(rsp->OutputBufferLength);
1077                         }
1078                         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1079                         resp_buftype[1] = CIFS_NO_BUFFER;
1080                         memset(&rsp_iov[1], 0, sizeof(rsp_iov[1]));
1081                         rc = 0;
1082
1083                         /* Use a fudge factor of 256 bytes in case we collide
1084                          * with a different set_EAs command.
1085                          */
1086                         if(CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE -
1087                            MAX_SMB2_CLOSE_RESPONSE_SIZE - 256 <
1088                            used_len + ea_name_len + ea_value_len + 1) {
1089                                 rc = -ENOSPC;
1090                                 goto sea_exit;
1091                         }
1092                 }
1093         }
1094
1095         /* Open */
1096         memset(&open_iov, 0, sizeof(open_iov));
1097         rqst[0].rq_iov = open_iov;
1098         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1099
1100         memset(&oparms, 0, sizeof(oparms));
1101         oparms.tcon = tcon;
1102         oparms.desired_access = FILE_WRITE_EA;
1103         oparms.disposition = FILE_OPEN;
1104         oparms.create_options = cifs_create_options(cifs_sb, 0);
1105         oparms.fid = &fid;
1106         oparms.reconnect = false;
1107
1108         rc = SMB2_open_init(tcon, server,
1109                             &rqst[0], &oplock, &oparms, utf16_path);
1110         if (rc)
1111                 goto sea_exit;
1112         smb2_set_next_command(tcon, &rqst[0]);
1113
1114
1115         /* Set Info */
1116         memset(&si_iov, 0, sizeof(si_iov));
1117         rqst[1].rq_iov = si_iov;
1118         rqst[1].rq_nvec = 1;
1119
1120         len = sizeof(*ea) + ea_name_len + ea_value_len + 1;
1121         ea = kzalloc(len, GFP_KERNEL);
1122         if (ea == NULL) {
1123                 rc = -ENOMEM;
1124                 goto sea_exit;
1125         }
1126
1127         ea->ea_name_length = ea_name_len;
1128         ea->ea_value_length = cpu_to_le16(ea_value_len);
1129         memcpy(ea->ea_data, ea_name, ea_name_len + 1);
1130         memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len);
1131
1132         size[0] = len;
1133         data[0] = ea;
1134
1135         rc = SMB2_set_info_init(tcon, server,
1136                                 &rqst[1], COMPOUND_FID,
1137                                 COMPOUND_FID, current->tgid,
1138                                 FILE_FULL_EA_INFORMATION,
1139                                 SMB2_O_INFO_FILE, 0, data, size);
1140         if (rc)
1141                 goto sea_exit;
1142         smb2_set_next_command(tcon, &rqst[1]);
1143         smb2_set_related(&rqst[1]);
1144
1145
1146         /* Close */
1147         memset(&close_iov, 0, sizeof(close_iov));
1148         rqst[2].rq_iov = close_iov;
1149         rqst[2].rq_nvec = 1;
1150         rc = SMB2_close_init(tcon, server,
1151                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
1152         if (rc)
1153                 goto sea_exit;
1154         smb2_set_related(&rqst[2]);
1155
1156         rc = compound_send_recv(xid, ses, server,
1157                                 flags, 3, rqst,
1158                                 resp_buftype, rsp_iov);
1159         /* no need to bump num_remote_opens because handle immediately closed */
1160
1161  sea_exit:
1162         kfree(ea);
1163         kfree(utf16_path);
1164         SMB2_open_free(&rqst[0]);
1165         SMB2_set_info_free(&rqst[1]);
1166         SMB2_close_free(&rqst[2]);
1167         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1168         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1169         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1170         return rc;
1171 }
1172 #endif
1173
1174 static bool
1175 smb2_can_echo(struct TCP_Server_Info *server)
1176 {
1177         return server->echoes;
1178 }
1179
1180 static void
1181 smb2_clear_stats(struct cifs_tcon *tcon)
1182 {
1183         int i;
1184
1185         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
1186                 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
1187                 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
1188         }
1189 }
1190
1191 static void
1192 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
1193 {
1194         seq_puts(m, "\n\tShare Capabilities:");
1195         if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
1196                 seq_puts(m, " DFS,");
1197         if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
1198                 seq_puts(m, " CONTINUOUS AVAILABILITY,");
1199         if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
1200                 seq_puts(m, " SCALEOUT,");
1201         if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
1202                 seq_puts(m, " CLUSTER,");
1203         if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
1204                 seq_puts(m, " ASYMMETRIC,");
1205         if (tcon->capabilities == 0)
1206                 seq_puts(m, " None");
1207         if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
1208                 seq_puts(m, " Aligned,");
1209         if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
1210                 seq_puts(m, " Partition Aligned,");
1211         if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
1212                 seq_puts(m, " SSD,");
1213         if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
1214                 seq_puts(m, " TRIM-support,");
1215
1216         seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
1217         seq_printf(m, "\n\ttid: 0x%x", tcon->tid);
1218         if (tcon->perf_sector_size)
1219                 seq_printf(m, "\tOptimal sector size: 0x%x",
1220                            tcon->perf_sector_size);
1221         seq_printf(m, "\tMaximal Access: 0x%x", tcon->maximal_access);
1222 }
1223
1224 static void
1225 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
1226 {
1227         atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
1228         atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
1229
1230         /*
1231          *  Can't display SMB2_NEGOTIATE, SESSION_SETUP, LOGOFF, CANCEL and ECHO
1232          *  totals (requests sent) since those SMBs are per-session not per tcon
1233          */
1234         seq_printf(m, "\nBytes read: %llu  Bytes written: %llu",
1235                    (long long)(tcon->bytes_read),
1236                    (long long)(tcon->bytes_written));
1237         seq_printf(m, "\nOpen files: %d total (local), %d open on server",
1238                    atomic_read(&tcon->num_local_opens),
1239                    atomic_read(&tcon->num_remote_opens));
1240         seq_printf(m, "\nTreeConnects: %d total %d failed",
1241                    atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
1242                    atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
1243         seq_printf(m, "\nTreeDisconnects: %d total %d failed",
1244                    atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
1245                    atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
1246         seq_printf(m, "\nCreates: %d total %d failed",
1247                    atomic_read(&sent[SMB2_CREATE_HE]),
1248                    atomic_read(&failed[SMB2_CREATE_HE]));
1249         seq_printf(m, "\nCloses: %d total %d failed",
1250                    atomic_read(&sent[SMB2_CLOSE_HE]),
1251                    atomic_read(&failed[SMB2_CLOSE_HE]));
1252         seq_printf(m, "\nFlushes: %d total %d failed",
1253                    atomic_read(&sent[SMB2_FLUSH_HE]),
1254                    atomic_read(&failed[SMB2_FLUSH_HE]));
1255         seq_printf(m, "\nReads: %d total %d failed",
1256                    atomic_read(&sent[SMB2_READ_HE]),
1257                    atomic_read(&failed[SMB2_READ_HE]));
1258         seq_printf(m, "\nWrites: %d total %d failed",
1259                    atomic_read(&sent[SMB2_WRITE_HE]),
1260                    atomic_read(&failed[SMB2_WRITE_HE]));
1261         seq_printf(m, "\nLocks: %d total %d failed",
1262                    atomic_read(&sent[SMB2_LOCK_HE]),
1263                    atomic_read(&failed[SMB2_LOCK_HE]));
1264         seq_printf(m, "\nIOCTLs: %d total %d failed",
1265                    atomic_read(&sent[SMB2_IOCTL_HE]),
1266                    atomic_read(&failed[SMB2_IOCTL_HE]));
1267         seq_printf(m, "\nQueryDirectories: %d total %d failed",
1268                    atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
1269                    atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
1270         seq_printf(m, "\nChangeNotifies: %d total %d failed",
1271                    atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
1272                    atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
1273         seq_printf(m, "\nQueryInfos: %d total %d failed",
1274                    atomic_read(&sent[SMB2_QUERY_INFO_HE]),
1275                    atomic_read(&failed[SMB2_QUERY_INFO_HE]));
1276         seq_printf(m, "\nSetInfos: %d total %d failed",
1277                    atomic_read(&sent[SMB2_SET_INFO_HE]),
1278                    atomic_read(&failed[SMB2_SET_INFO_HE]));
1279         seq_printf(m, "\nOplockBreaks: %d sent %d failed",
1280                    atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
1281                    atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
1282 }
1283
1284 static void
1285 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
1286 {
1287         struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
1288         struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
1289
1290         cfile->fid.persistent_fid = fid->persistent_fid;
1291         cfile->fid.volatile_fid = fid->volatile_fid;
1292         cfile->fid.access = fid->access;
1293 #ifdef CONFIG_CIFS_DEBUG2
1294         cfile->fid.mid = fid->mid;
1295 #endif /* CIFS_DEBUG2 */
1296         server->ops->set_oplock_level(cinode, oplock, fid->epoch,
1297                                       &fid->purge_cache);
1298         cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
1299         memcpy(cfile->fid.create_guid, fid->create_guid, 16);
1300 }
1301
1302 static void
1303 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
1304                 struct cifs_fid *fid)
1305 {
1306         SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1307 }
1308
1309 static void
1310 smb2_close_getattr(const unsigned int xid, struct cifs_tcon *tcon,
1311                    struct cifsFileInfo *cfile)
1312 {
1313         struct smb2_file_network_open_info file_inf;
1314         struct inode *inode;
1315         int rc;
1316
1317         rc = __SMB2_close(xid, tcon, cfile->fid.persistent_fid,
1318                    cfile->fid.volatile_fid, &file_inf);
1319         if (rc)
1320                 return;
1321
1322         inode = d_inode(cfile->dentry);
1323
1324         spin_lock(&inode->i_lock);
1325         CIFS_I(inode)->time = jiffies;
1326
1327         /* Creation time should not need to be updated on close */
1328         if (file_inf.LastWriteTime)
1329                 inode->i_mtime = cifs_NTtimeToUnix(file_inf.LastWriteTime);
1330         if (file_inf.ChangeTime)
1331                 inode->i_ctime = cifs_NTtimeToUnix(file_inf.ChangeTime);
1332         if (file_inf.LastAccessTime)
1333                 inode->i_atime = cifs_NTtimeToUnix(file_inf.LastAccessTime);
1334
1335         /*
1336          * i_blocks is not related to (i_size / i_blksize),
1337          * but instead 512 byte (2**9) size is required for
1338          * calculating num blocks.
1339          */
1340         if (le64_to_cpu(file_inf.AllocationSize) > 4096)
1341                 inode->i_blocks =
1342                         (512 - 1 + le64_to_cpu(file_inf.AllocationSize)) >> 9;
1343
1344         /* End of file and Attributes should not have to be updated on close */
1345         spin_unlock(&inode->i_lock);
1346 }
1347
1348 static int
1349 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
1350                      u64 persistent_fid, u64 volatile_fid,
1351                      struct copychunk_ioctl *pcchunk)
1352 {
1353         int rc;
1354         unsigned int ret_data_len;
1355         struct resume_key_req *res_key;
1356
1357         rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
1358                         FSCTL_SRV_REQUEST_RESUME_KEY, NULL, 0 /* no input */,
1359                         CIFSMaxBufSize, (char **)&res_key, &ret_data_len);
1360
1361         if (rc == -EOPNOTSUPP) {
1362                 pr_warn_once("Server share %s does not support copy range\n", tcon->tree_name);
1363                 goto req_res_key_exit;
1364         } else if (rc) {
1365                 cifs_tcon_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
1366                 goto req_res_key_exit;
1367         }
1368         if (ret_data_len < sizeof(struct resume_key_req)) {
1369                 cifs_tcon_dbg(VFS, "Invalid refcopy resume key length\n");
1370                 rc = -EINVAL;
1371                 goto req_res_key_exit;
1372         }
1373         memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
1374
1375 req_res_key_exit:
1376         kfree(res_key);
1377         return rc;
1378 }
1379
1380 struct iqi_vars {
1381         struct smb_rqst rqst[3];
1382         struct kvec rsp_iov[3];
1383         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
1384         struct kvec qi_iov[1];
1385         struct kvec io_iov[SMB2_IOCTL_IOV_SIZE];
1386         struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE];
1387         struct kvec close_iov[1];
1388 };
1389
1390 static int
1391 smb2_ioctl_query_info(const unsigned int xid,
1392                       struct cifs_tcon *tcon,
1393                       struct cifs_sb_info *cifs_sb,
1394                       __le16 *path, int is_dir,
1395                       unsigned long p)
1396 {
1397         struct iqi_vars *vars;
1398         struct smb_rqst *rqst;
1399         struct kvec *rsp_iov;
1400         struct cifs_ses *ses = tcon->ses;
1401         struct TCP_Server_Info *server = cifs_pick_channel(ses);
1402         char __user *arg = (char __user *)p;
1403         struct smb_query_info qi;
1404         struct smb_query_info __user *pqi;
1405         int rc = 0;
1406         int flags = CIFS_CP_CREATE_CLOSE_OP;
1407         struct smb2_query_info_rsp *qi_rsp = NULL;
1408         struct smb2_ioctl_rsp *io_rsp = NULL;
1409         void *buffer = NULL;
1410         int resp_buftype[3];
1411         struct cifs_open_parms oparms;
1412         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1413         struct cifs_fid fid;
1414         unsigned int size[2];
1415         void *data[2];
1416         int create_options = is_dir ? CREATE_NOT_FILE : CREATE_NOT_DIR;
1417         void (*free_req1_func)(struct smb_rqst *r);
1418
1419         vars = kzalloc(sizeof(*vars), GFP_ATOMIC);
1420         if (vars == NULL)
1421                 return -ENOMEM;
1422         rqst = &vars->rqst[0];
1423         rsp_iov = &vars->rsp_iov[0];
1424
1425         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1426
1427         if (copy_from_user(&qi, arg, sizeof(struct smb_query_info))) {
1428                 rc = -EFAULT;
1429                 goto free_vars;
1430         }
1431         if (qi.output_buffer_length > 1024) {
1432                 rc = -EINVAL;
1433                 goto free_vars;
1434         }
1435
1436         if (!ses || !server) {
1437                 rc = -EIO;
1438                 goto free_vars;
1439         }
1440
1441         if (smb3_encryption_required(tcon))
1442                 flags |= CIFS_TRANSFORM_REQ;
1443
1444         if (qi.output_buffer_length) {
1445                 buffer = memdup_user(arg + sizeof(struct smb_query_info), qi.output_buffer_length);
1446                 if (IS_ERR(buffer)) {
1447                         rc = PTR_ERR(buffer);
1448                         goto free_vars;
1449                 }
1450         }
1451
1452         /* Open */
1453         rqst[0].rq_iov = &vars->open_iov[0];
1454         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1455
1456         memset(&oparms, 0, sizeof(oparms));
1457         oparms.tcon = tcon;
1458         oparms.disposition = FILE_OPEN;
1459         oparms.create_options = cifs_create_options(cifs_sb, create_options);
1460         oparms.fid = &fid;
1461         oparms.reconnect = false;
1462
1463         if (qi.flags & PASSTHRU_FSCTL) {
1464                 switch (qi.info_type & FSCTL_DEVICE_ACCESS_MASK) {
1465                 case FSCTL_DEVICE_ACCESS_FILE_READ_WRITE_ACCESS:
1466                         oparms.desired_access = FILE_READ_DATA | FILE_WRITE_DATA | FILE_READ_ATTRIBUTES | SYNCHRONIZE;
1467                         break;
1468                 case FSCTL_DEVICE_ACCESS_FILE_ANY_ACCESS:
1469                         oparms.desired_access = GENERIC_ALL;
1470                         break;
1471                 case FSCTL_DEVICE_ACCESS_FILE_READ_ACCESS:
1472                         oparms.desired_access = GENERIC_READ;
1473                         break;
1474                 case FSCTL_DEVICE_ACCESS_FILE_WRITE_ACCESS:
1475                         oparms.desired_access = GENERIC_WRITE;
1476                         break;
1477                 }
1478         } else if (qi.flags & PASSTHRU_SET_INFO) {
1479                 oparms.desired_access = GENERIC_WRITE;
1480         } else {
1481                 oparms.desired_access = FILE_READ_ATTRIBUTES | READ_CONTROL;
1482         }
1483
1484         rc = SMB2_open_init(tcon, server,
1485                             &rqst[0], &oplock, &oparms, path);
1486         if (rc)
1487                 goto free_output_buffer;
1488         smb2_set_next_command(tcon, &rqst[0]);
1489
1490         /* Query */
1491         if (qi.flags & PASSTHRU_FSCTL) {
1492                 /* Can eventually relax perm check since server enforces too */
1493                 if (!capable(CAP_SYS_ADMIN)) {
1494                         rc = -EPERM;
1495                         goto free_open_req;
1496                 }
1497                 rqst[1].rq_iov = &vars->io_iov[0];
1498                 rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
1499
1500                 rc = SMB2_ioctl_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID,
1501                                      qi.info_type, buffer, qi.output_buffer_length,
1502                                      CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE -
1503                                      MAX_SMB2_CLOSE_RESPONSE_SIZE);
1504                 free_req1_func = SMB2_ioctl_free;
1505         } else if (qi.flags == PASSTHRU_SET_INFO) {
1506                 /* Can eventually relax perm check since server enforces too */
1507                 if (!capable(CAP_SYS_ADMIN)) {
1508                         rc = -EPERM;
1509                         goto free_open_req;
1510                 }
1511                 if (qi.output_buffer_length < 8) {
1512                         rc = -EINVAL;
1513                         goto free_open_req;
1514                 }
1515                 rqst[1].rq_iov = &vars->si_iov[0];
1516                 rqst[1].rq_nvec = 1;
1517
1518                 /* MS-FSCC 2.4.13 FileEndOfFileInformation */
1519                 size[0] = 8;
1520                 data[0] = buffer;
1521
1522                 rc = SMB2_set_info_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID,
1523                                         current->tgid, FILE_END_OF_FILE_INFORMATION,
1524                                         SMB2_O_INFO_FILE, 0, data, size);
1525                 free_req1_func = SMB2_set_info_free;
1526         } else if (qi.flags == PASSTHRU_QUERY_INFO) {
1527                 rqst[1].rq_iov = &vars->qi_iov[0];
1528                 rqst[1].rq_nvec = 1;
1529
1530                 rc = SMB2_query_info_init(tcon, server,
1531                                   &rqst[1], COMPOUND_FID,
1532                                   COMPOUND_FID, qi.file_info_class,
1533                                   qi.info_type, qi.additional_information,
1534                                   qi.input_buffer_length,
1535                                   qi.output_buffer_length, buffer);
1536                 free_req1_func = SMB2_query_info_free;
1537         } else { /* unknown flags */
1538                 cifs_tcon_dbg(VFS, "Invalid passthru query flags: 0x%x\n",
1539                               qi.flags);
1540                 rc = -EINVAL;
1541         }
1542
1543         if (rc)
1544                 goto free_open_req;
1545         smb2_set_next_command(tcon, &rqst[1]);
1546         smb2_set_related(&rqst[1]);
1547
1548         /* Close */
1549         rqst[2].rq_iov = &vars->close_iov[0];
1550         rqst[2].rq_nvec = 1;
1551
1552         rc = SMB2_close_init(tcon, server,
1553                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
1554         if (rc)
1555                 goto free_req_1;
1556         smb2_set_related(&rqst[2]);
1557
1558         rc = compound_send_recv(xid, ses, server,
1559                                 flags, 3, rqst,
1560                                 resp_buftype, rsp_iov);
1561         if (rc)
1562                 goto out;
1563
1564         /* No need to bump num_remote_opens since handle immediately closed */
1565         if (qi.flags & PASSTHRU_FSCTL) {
1566                 pqi = (struct smb_query_info __user *)arg;
1567                 io_rsp = (struct smb2_ioctl_rsp *)rsp_iov[1].iov_base;
1568                 if (le32_to_cpu(io_rsp->OutputCount) < qi.input_buffer_length)
1569                         qi.input_buffer_length = le32_to_cpu(io_rsp->OutputCount);
1570                 if (qi.input_buffer_length > 0 &&
1571                     le32_to_cpu(io_rsp->OutputOffset) + qi.input_buffer_length
1572                     > rsp_iov[1].iov_len) {
1573                         rc = -EFAULT;
1574                         goto out;
1575                 }
1576
1577                 if (copy_to_user(&pqi->input_buffer_length,
1578                                  &qi.input_buffer_length,
1579                                  sizeof(qi.input_buffer_length))) {
1580                         rc = -EFAULT;
1581                         goto out;
1582                 }
1583
1584                 if (copy_to_user((void __user *)pqi + sizeof(struct smb_query_info),
1585                                  (const void *)io_rsp + le32_to_cpu(io_rsp->OutputOffset),
1586                                  qi.input_buffer_length))
1587                         rc = -EFAULT;
1588         } else {
1589                 pqi = (struct smb_query_info __user *)arg;
1590                 qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1591                 if (le32_to_cpu(qi_rsp->OutputBufferLength) < qi.input_buffer_length)
1592                         qi.input_buffer_length = le32_to_cpu(qi_rsp->OutputBufferLength);
1593                 if (copy_to_user(&pqi->input_buffer_length,
1594                                  &qi.input_buffer_length,
1595                                  sizeof(qi.input_buffer_length))) {
1596                         rc = -EFAULT;
1597                         goto out;
1598                 }
1599
1600                 if (copy_to_user(pqi + 1, qi_rsp->Buffer,
1601                                  qi.input_buffer_length))
1602                         rc = -EFAULT;
1603         }
1604
1605 out:
1606         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1607         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1608         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1609         SMB2_close_free(&rqst[2]);
1610 free_req_1:
1611         free_req1_func(&rqst[1]);
1612 free_open_req:
1613         SMB2_open_free(&rqst[0]);
1614 free_output_buffer:
1615         kfree(buffer);
1616 free_vars:
1617         kfree(vars);
1618         return rc;
1619 }
1620
1621 static ssize_t
1622 smb2_copychunk_range(const unsigned int xid,
1623                         struct cifsFileInfo *srcfile,
1624                         struct cifsFileInfo *trgtfile, u64 src_off,
1625                         u64 len, u64 dest_off)
1626 {
1627         int rc;
1628         unsigned int ret_data_len;
1629         struct copychunk_ioctl *pcchunk;
1630         struct copychunk_ioctl_rsp *retbuf = NULL;
1631         struct cifs_tcon *tcon;
1632         int chunks_copied = 0;
1633         bool chunk_sizes_updated = false;
1634         ssize_t bytes_written, total_bytes_written = 0;
1635
1636         pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
1637         if (pcchunk == NULL)
1638                 return -ENOMEM;
1639
1640         cifs_dbg(FYI, "%s: about to call request res key\n", __func__);
1641         /* Request a key from the server to identify the source of the copy */
1642         rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
1643                                 srcfile->fid.persistent_fid,
1644                                 srcfile->fid.volatile_fid, pcchunk);
1645
1646         /* Note: request_res_key sets res_key null only if rc !=0 */
1647         if (rc)
1648                 goto cchunk_out;
1649
1650         /* For now array only one chunk long, will make more flexible later */
1651         pcchunk->ChunkCount = cpu_to_le32(1);
1652         pcchunk->Reserved = 0;
1653         pcchunk->Reserved2 = 0;
1654
1655         tcon = tlink_tcon(trgtfile->tlink);
1656
1657         while (len > 0) {
1658                 pcchunk->SourceOffset = cpu_to_le64(src_off);
1659                 pcchunk->TargetOffset = cpu_to_le64(dest_off);
1660                 pcchunk->Length =
1661                         cpu_to_le32(min_t(u32, len, tcon->max_bytes_chunk));
1662
1663                 /* Request server copy to target from src identified by key */
1664                 kfree(retbuf);
1665                 retbuf = NULL;
1666                 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1667                         trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
1668                         (char *)pcchunk, sizeof(struct copychunk_ioctl),
1669                         CIFSMaxBufSize, (char **)&retbuf, &ret_data_len);
1670                 if (rc == 0) {
1671                         if (ret_data_len !=
1672                                         sizeof(struct copychunk_ioctl_rsp)) {
1673                                 cifs_tcon_dbg(VFS, "Invalid cchunk response size\n");
1674                                 rc = -EIO;
1675                                 goto cchunk_out;
1676                         }
1677                         if (retbuf->TotalBytesWritten == 0) {
1678                                 cifs_dbg(FYI, "no bytes copied\n");
1679                                 rc = -EIO;
1680                                 goto cchunk_out;
1681                         }
1682                         /*
1683                          * Check if server claimed to write more than we asked
1684                          */
1685                         if (le32_to_cpu(retbuf->TotalBytesWritten) >
1686                             le32_to_cpu(pcchunk->Length)) {
1687                                 cifs_tcon_dbg(VFS, "Invalid copy chunk response\n");
1688                                 rc = -EIO;
1689                                 goto cchunk_out;
1690                         }
1691                         if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
1692                                 cifs_tcon_dbg(VFS, "Invalid num chunks written\n");
1693                                 rc = -EIO;
1694                                 goto cchunk_out;
1695                         }
1696                         chunks_copied++;
1697
1698                         bytes_written = le32_to_cpu(retbuf->TotalBytesWritten);
1699                         src_off += bytes_written;
1700                         dest_off += bytes_written;
1701                         len -= bytes_written;
1702                         total_bytes_written += bytes_written;
1703
1704                         cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n",
1705                                 le32_to_cpu(retbuf->ChunksWritten),
1706                                 le32_to_cpu(retbuf->ChunkBytesWritten),
1707                                 bytes_written);
1708                 } else if (rc == -EINVAL) {
1709                         if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
1710                                 goto cchunk_out;
1711
1712                         cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
1713                                 le32_to_cpu(retbuf->ChunksWritten),
1714                                 le32_to_cpu(retbuf->ChunkBytesWritten),
1715                                 le32_to_cpu(retbuf->TotalBytesWritten));
1716
1717                         /*
1718                          * Check if this is the first request using these sizes,
1719                          * (ie check if copy succeed once with original sizes
1720                          * and check if the server gave us different sizes after
1721                          * we already updated max sizes on previous request).
1722                          * if not then why is the server returning an error now
1723                          */
1724                         if ((chunks_copied != 0) || chunk_sizes_updated)
1725                                 goto cchunk_out;
1726
1727                         /* Check that server is not asking us to grow size */
1728                         if (le32_to_cpu(retbuf->ChunkBytesWritten) <
1729                                         tcon->max_bytes_chunk)
1730                                 tcon->max_bytes_chunk =
1731                                         le32_to_cpu(retbuf->ChunkBytesWritten);
1732                         else
1733                                 goto cchunk_out; /* server gave us bogus size */
1734
1735                         /* No need to change MaxChunks since already set to 1 */
1736                         chunk_sizes_updated = true;
1737                 } else
1738                         goto cchunk_out;
1739         }
1740
1741 cchunk_out:
1742         kfree(pcchunk);
1743         kfree(retbuf);
1744         if (rc)
1745                 return rc;
1746         else
1747                 return total_bytes_written;
1748 }
1749
1750 static int
1751 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
1752                 struct cifs_fid *fid)
1753 {
1754         return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1755 }
1756
1757 static unsigned int
1758 smb2_read_data_offset(char *buf)
1759 {
1760         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1761
1762         return rsp->DataOffset;
1763 }
1764
1765 static unsigned int
1766 smb2_read_data_length(char *buf, bool in_remaining)
1767 {
1768         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1769
1770         if (in_remaining)
1771                 return le32_to_cpu(rsp->DataRemaining);
1772
1773         return le32_to_cpu(rsp->DataLength);
1774 }
1775
1776
1777 static int
1778 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
1779                struct cifs_io_parms *parms, unsigned int *bytes_read,
1780                char **buf, int *buf_type)
1781 {
1782         parms->persistent_fid = pfid->persistent_fid;
1783         parms->volatile_fid = pfid->volatile_fid;
1784         return SMB2_read(xid, parms, bytes_read, buf, buf_type);
1785 }
1786
1787 static int
1788 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
1789                 struct cifs_io_parms *parms, unsigned int *written,
1790                 struct kvec *iov, unsigned long nr_segs)
1791 {
1792
1793         parms->persistent_fid = pfid->persistent_fid;
1794         parms->volatile_fid = pfid->volatile_fid;
1795         return SMB2_write(xid, parms, written, iov, nr_segs);
1796 }
1797
1798 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
1799 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
1800                 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
1801 {
1802         struct cifsInodeInfo *cifsi;
1803         int rc;
1804
1805         cifsi = CIFS_I(inode);
1806
1807         /* if file already sparse don't bother setting sparse again */
1808         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
1809                 return true; /* already sparse */
1810
1811         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
1812                 return true; /* already not sparse */
1813
1814         /*
1815          * Can't check for sparse support on share the usual way via the
1816          * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
1817          * since Samba server doesn't set the flag on the share, yet
1818          * supports the set sparse FSCTL and returns sparse correctly
1819          * in the file attributes. If we fail setting sparse though we
1820          * mark that server does not support sparse files for this share
1821          * to avoid repeatedly sending the unsupported fsctl to server
1822          * if the file is repeatedly extended.
1823          */
1824         if (tcon->broken_sparse_sup)
1825                 return false;
1826
1827         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1828                         cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
1829                         &setsparse, 1, CIFSMaxBufSize, NULL, NULL);
1830         if (rc) {
1831                 tcon->broken_sparse_sup = true;
1832                 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
1833                 return false;
1834         }
1835
1836         if (setsparse)
1837                 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
1838         else
1839                 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
1840
1841         return true;
1842 }
1843
1844 static int
1845 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
1846                    struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
1847 {
1848         __le64 eof = cpu_to_le64(size);
1849         struct inode *inode;
1850
1851         /*
1852          * If extending file more than one page make sparse. Many Linux fs
1853          * make files sparse by default when extending via ftruncate
1854          */
1855         inode = d_inode(cfile->dentry);
1856
1857         if (!set_alloc && (size > inode->i_size + 8192)) {
1858                 __u8 set_sparse = 1;
1859
1860                 /* whether set sparse succeeds or not, extend the file */
1861                 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
1862         }
1863
1864         return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
1865                             cfile->fid.volatile_fid, cfile->pid, &eof);
1866 }
1867
1868 static int
1869 smb2_duplicate_extents(const unsigned int xid,
1870                         struct cifsFileInfo *srcfile,
1871                         struct cifsFileInfo *trgtfile, u64 src_off,
1872                         u64 len, u64 dest_off)
1873 {
1874         int rc;
1875         unsigned int ret_data_len;
1876         struct inode *inode;
1877         struct duplicate_extents_to_file dup_ext_buf;
1878         struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
1879
1880         /* server fileays advertise duplicate extent support with this flag */
1881         if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
1882              FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
1883                 return -EOPNOTSUPP;
1884
1885         dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
1886         dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
1887         dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
1888         dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
1889         dup_ext_buf.ByteCount = cpu_to_le64(len);
1890         cifs_dbg(FYI, "Duplicate extents: src off %lld dst off %lld len %lld\n",
1891                 src_off, dest_off, len);
1892
1893         inode = d_inode(trgtfile->dentry);
1894         if (inode->i_size < dest_off + len) {
1895                 rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
1896                 if (rc)
1897                         goto duplicate_extents_out;
1898
1899                 /*
1900                  * Although also could set plausible allocation size (i_blocks)
1901                  * here in addition to setting the file size, in reflink
1902                  * it is likely that the target file is sparse. Its allocation
1903                  * size will be queried on next revalidate, but it is important
1904                  * to make sure that file's cached size is updated immediately
1905                  */
1906                 cifs_setsize(inode, dest_off + len);
1907         }
1908         rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1909                         trgtfile->fid.volatile_fid,
1910                         FSCTL_DUPLICATE_EXTENTS_TO_FILE,
1911                         (char *)&dup_ext_buf,
1912                         sizeof(struct duplicate_extents_to_file),
1913                         CIFSMaxBufSize, NULL,
1914                         &ret_data_len);
1915
1916         if (ret_data_len > 0)
1917                 cifs_dbg(FYI, "Non-zero response length in duplicate extents\n");
1918
1919 duplicate_extents_out:
1920         return rc;
1921 }
1922
1923 static int
1924 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
1925                    struct cifsFileInfo *cfile)
1926 {
1927         return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
1928                             cfile->fid.volatile_fid);
1929 }
1930
1931 static int
1932 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
1933                    struct cifsFileInfo *cfile)
1934 {
1935         struct fsctl_set_integrity_information_req integr_info;
1936         unsigned int ret_data_len;
1937
1938         integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
1939         integr_info.Flags = 0;
1940         integr_info.Reserved = 0;
1941
1942         return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1943                         cfile->fid.volatile_fid,
1944                         FSCTL_SET_INTEGRITY_INFORMATION,
1945                         (char *)&integr_info,
1946                         sizeof(struct fsctl_set_integrity_information_req),
1947                         CIFSMaxBufSize, NULL,
1948                         &ret_data_len);
1949
1950 }
1951
1952 /* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */
1953 #define GMT_TOKEN_SIZE 50
1954
1955 #define MIN_SNAPSHOT_ARRAY_SIZE 16 /* See MS-SMB2 section 3.3.5.15.1 */
1956
1957 /*
1958  * Input buffer contains (empty) struct smb_snapshot array with size filled in
1959  * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2
1960  */
1961 static int
1962 smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
1963                    struct cifsFileInfo *cfile, void __user *ioc_buf)
1964 {
1965         char *retbuf = NULL;
1966         unsigned int ret_data_len = 0;
1967         int rc;
1968         u32 max_response_size;
1969         struct smb_snapshot_array snapshot_in;
1970
1971         /*
1972          * On the first query to enumerate the list of snapshots available
1973          * for this volume the buffer begins with 0 (number of snapshots
1974          * which can be returned is zero since at that point we do not know
1975          * how big the buffer needs to be). On the second query,
1976          * it (ret_data_len) is set to number of snapshots so we can
1977          * know to set the maximum response size larger (see below).
1978          */
1979         if (get_user(ret_data_len, (unsigned int __user *)ioc_buf))
1980                 return -EFAULT;
1981
1982         /*
1983          * Note that for snapshot queries that servers like Azure expect that
1984          * the first query be minimal size (and just used to get the number/size
1985          * of previous versions) so response size must be specified as EXACTLY
1986          * sizeof(struct snapshot_array) which is 16 when rounded up to multiple
1987          * of eight bytes.
1988          */
1989         if (ret_data_len == 0)
1990                 max_response_size = MIN_SNAPSHOT_ARRAY_SIZE;
1991         else
1992                 max_response_size = CIFSMaxBufSize;
1993
1994         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1995                         cfile->fid.volatile_fid,
1996                         FSCTL_SRV_ENUMERATE_SNAPSHOTS,
1997                         NULL, 0 /* no input data */, max_response_size,
1998                         (char **)&retbuf,
1999                         &ret_data_len);
2000         cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n",
2001                         rc, ret_data_len);
2002         if (rc)
2003                 return rc;
2004
2005         if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) {
2006                 /* Fixup buffer */
2007                 if (copy_from_user(&snapshot_in, ioc_buf,
2008                     sizeof(struct smb_snapshot_array))) {
2009                         rc = -EFAULT;
2010                         kfree(retbuf);
2011                         return rc;
2012                 }
2013
2014                 /*
2015                  * Check for min size, ie not large enough to fit even one GMT
2016                  * token (snapshot).  On the first ioctl some users may pass in
2017                  * smaller size (or zero) to simply get the size of the array
2018                  * so the user space caller can allocate sufficient memory
2019                  * and retry the ioctl again with larger array size sufficient
2020                  * to hold all of the snapshot GMT tokens on the second try.
2021                  */
2022                 if (snapshot_in.snapshot_array_size < GMT_TOKEN_SIZE)
2023                         ret_data_len = sizeof(struct smb_snapshot_array);
2024
2025                 /*
2026                  * We return struct SRV_SNAPSHOT_ARRAY, followed by
2027                  * the snapshot array (of 50 byte GMT tokens) each
2028                  * representing an available previous version of the data
2029                  */
2030                 if (ret_data_len > (snapshot_in.snapshot_array_size +
2031                                         sizeof(struct smb_snapshot_array)))
2032                         ret_data_len = snapshot_in.snapshot_array_size +
2033                                         sizeof(struct smb_snapshot_array);
2034
2035                 if (copy_to_user(ioc_buf, retbuf, ret_data_len))
2036                         rc = -EFAULT;
2037         }
2038
2039         kfree(retbuf);
2040         return rc;
2041 }
2042
2043
2044
2045 static int
2046 smb3_notify(const unsigned int xid, struct file *pfile,
2047             void __user *ioc_buf, bool return_changes)
2048 {
2049         struct smb3_notify_info notify;
2050         struct smb3_notify_info __user *pnotify_buf;
2051         struct dentry *dentry = pfile->f_path.dentry;
2052         struct inode *inode = file_inode(pfile);
2053         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2054         struct cifs_open_parms oparms;
2055         struct cifs_fid fid;
2056         struct cifs_tcon *tcon;
2057         const unsigned char *path;
2058         char *returned_ioctl_info = NULL;
2059         void *page = alloc_dentry_path();
2060         __le16 *utf16_path = NULL;
2061         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2062         int rc = 0;
2063         __u32 ret_len = 0;
2064
2065         path = build_path_from_dentry(dentry, page);
2066         if (IS_ERR(path)) {
2067                 rc = PTR_ERR(path);
2068                 goto notify_exit;
2069         }
2070
2071         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2072         if (utf16_path == NULL) {
2073                 rc = -ENOMEM;
2074                 goto notify_exit;
2075         }
2076
2077         if (return_changes) {
2078                 if (copy_from_user(&notify, ioc_buf, sizeof(struct smb3_notify_info))) {
2079                         rc = -EFAULT;
2080                         goto notify_exit;
2081                 }
2082         } else {
2083                 if (copy_from_user(&notify, ioc_buf, sizeof(struct smb3_notify))) {
2084                         rc = -EFAULT;
2085                         goto notify_exit;
2086                 }
2087                 notify.data_len = 0;
2088         }
2089
2090         tcon = cifs_sb_master_tcon(cifs_sb);
2091         oparms.tcon = tcon;
2092         oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
2093         oparms.disposition = FILE_OPEN;
2094         oparms.create_options = cifs_create_options(cifs_sb, 0);
2095         oparms.fid = &fid;
2096         oparms.reconnect = false;
2097
2098         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
2099                        NULL);
2100         if (rc)
2101                 goto notify_exit;
2102
2103         rc = SMB2_change_notify(xid, tcon, fid.persistent_fid, fid.volatile_fid,
2104                                 notify.watch_tree, notify.completion_filter,
2105                                 notify.data_len, &returned_ioctl_info, &ret_len);
2106
2107         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2108
2109         cifs_dbg(FYI, "change notify for path %s rc %d\n", path, rc);
2110         if (return_changes && (ret_len > 0) && (notify.data_len > 0)) {
2111                 if (ret_len > notify.data_len)
2112                         ret_len = notify.data_len;
2113                 pnotify_buf = (struct smb3_notify_info __user *)ioc_buf;
2114                 if (copy_to_user(pnotify_buf->notify_data, returned_ioctl_info, ret_len))
2115                         rc = -EFAULT;
2116                 else if (copy_to_user(&pnotify_buf->data_len, &ret_len, sizeof(ret_len)))
2117                         rc = -EFAULT;
2118         }
2119         kfree(returned_ioctl_info);
2120 notify_exit:
2121         free_dentry_path(page);
2122         kfree(utf16_path);
2123         return rc;
2124 }
2125
2126 static int
2127 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
2128                      const char *path, struct cifs_sb_info *cifs_sb,
2129                      struct cifs_fid *fid, __u16 search_flags,
2130                      struct cifs_search_info *srch_inf)
2131 {
2132         __le16 *utf16_path;
2133         struct smb_rqst rqst[2];
2134         struct kvec rsp_iov[2];
2135         int resp_buftype[2];
2136         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2137         struct kvec qd_iov[SMB2_QUERY_DIRECTORY_IOV_SIZE];
2138         int rc, flags = 0;
2139         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2140         struct cifs_open_parms oparms;
2141         struct smb2_query_directory_rsp *qd_rsp = NULL;
2142         struct smb2_create_rsp *op_rsp = NULL;
2143         struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
2144         int retry_count = 0;
2145
2146         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2147         if (!utf16_path)
2148                 return -ENOMEM;
2149
2150         if (smb3_encryption_required(tcon))
2151                 flags |= CIFS_TRANSFORM_REQ;
2152
2153         memset(rqst, 0, sizeof(rqst));
2154         resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER;
2155         memset(rsp_iov, 0, sizeof(rsp_iov));
2156
2157         /* Open */
2158         memset(&open_iov, 0, sizeof(open_iov));
2159         rqst[0].rq_iov = open_iov;
2160         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2161
2162         oparms.tcon = tcon;
2163         oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
2164         oparms.disposition = FILE_OPEN;
2165         oparms.create_options = cifs_create_options(cifs_sb, 0);
2166         oparms.fid = fid;
2167         oparms.reconnect = false;
2168
2169         rc = SMB2_open_init(tcon, server,
2170                             &rqst[0], &oplock, &oparms, utf16_path);
2171         if (rc)
2172                 goto qdf_free;
2173         smb2_set_next_command(tcon, &rqst[0]);
2174
2175         /* Query directory */
2176         srch_inf->entries_in_buffer = 0;
2177         srch_inf->index_of_last_entry = 2;
2178
2179         memset(&qd_iov, 0, sizeof(qd_iov));
2180         rqst[1].rq_iov = qd_iov;
2181         rqst[1].rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE;
2182
2183         rc = SMB2_query_directory_init(xid, tcon, server,
2184                                        &rqst[1],
2185                                        COMPOUND_FID, COMPOUND_FID,
2186                                        0, srch_inf->info_level);
2187         if (rc)
2188                 goto qdf_free;
2189
2190         smb2_set_related(&rqst[1]);
2191
2192 again:
2193         rc = compound_send_recv(xid, tcon->ses, server,
2194                                 flags, 2, rqst,
2195                                 resp_buftype, rsp_iov);
2196
2197         if (rc == -EAGAIN && retry_count++ < 10)
2198                 goto again;
2199
2200         /* If the open failed there is nothing to do */
2201         op_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base;
2202         if (op_rsp == NULL || op_rsp->hdr.Status != STATUS_SUCCESS) {
2203                 cifs_dbg(FYI, "query_dir_first: open failed rc=%d\n", rc);
2204                 goto qdf_free;
2205         }
2206         fid->persistent_fid = op_rsp->PersistentFileId;
2207         fid->volatile_fid = op_rsp->VolatileFileId;
2208
2209         /* Anything else than ENODATA means a genuine error */
2210         if (rc && rc != -ENODATA) {
2211                 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2212                 cifs_dbg(FYI, "query_dir_first: query directory failed rc=%d\n", rc);
2213                 trace_smb3_query_dir_err(xid, fid->persistent_fid,
2214                                          tcon->tid, tcon->ses->Suid, 0, 0, rc);
2215                 goto qdf_free;
2216         }
2217
2218         atomic_inc(&tcon->num_remote_opens);
2219
2220         qd_rsp = (struct smb2_query_directory_rsp *)rsp_iov[1].iov_base;
2221         if (qd_rsp->hdr.Status == STATUS_NO_MORE_FILES) {
2222                 trace_smb3_query_dir_done(xid, fid->persistent_fid,
2223                                           tcon->tid, tcon->ses->Suid, 0, 0);
2224                 srch_inf->endOfSearch = true;
2225                 rc = 0;
2226                 goto qdf_free;
2227         }
2228
2229         rc = smb2_parse_query_directory(tcon, &rsp_iov[1], resp_buftype[1],
2230                                         srch_inf);
2231         if (rc) {
2232                 trace_smb3_query_dir_err(xid, fid->persistent_fid, tcon->tid,
2233                         tcon->ses->Suid, 0, 0, rc);
2234                 goto qdf_free;
2235         }
2236         resp_buftype[1] = CIFS_NO_BUFFER;
2237
2238         trace_smb3_query_dir_done(xid, fid->persistent_fid, tcon->tid,
2239                         tcon->ses->Suid, 0, srch_inf->entries_in_buffer);
2240
2241  qdf_free:
2242         kfree(utf16_path);
2243         SMB2_open_free(&rqst[0]);
2244         SMB2_query_directory_free(&rqst[1]);
2245         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2246         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2247         return rc;
2248 }
2249
2250 static int
2251 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
2252                     struct cifs_fid *fid, __u16 search_flags,
2253                     struct cifs_search_info *srch_inf)
2254 {
2255         return SMB2_query_directory(xid, tcon, fid->persistent_fid,
2256                                     fid->volatile_fid, 0, srch_inf);
2257 }
2258
2259 static int
2260 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
2261                struct cifs_fid *fid)
2262 {
2263         return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2264 }
2265
2266 /*
2267  * If we negotiate SMB2 protocol and get STATUS_PENDING - update
2268  * the number of credits and return true. Otherwise - return false.
2269  */
2270 static bool
2271 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server)
2272 {
2273         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2274         int scredits, in_flight;
2275
2276         if (shdr->Status != STATUS_PENDING)
2277                 return false;
2278
2279         if (shdr->CreditRequest) {
2280                 spin_lock(&server->req_lock);
2281                 server->credits += le16_to_cpu(shdr->CreditRequest);
2282                 scredits = server->credits;
2283                 in_flight = server->in_flight;
2284                 spin_unlock(&server->req_lock);
2285                 wake_up(&server->request_q);
2286
2287                 trace_smb3_pend_credits(server->CurrentMid,
2288                                 server->conn_id, server->hostname, scredits,
2289                                 le16_to_cpu(shdr->CreditRequest), in_flight);
2290                 cifs_dbg(FYI, "%s: status pending add %u credits total=%d\n",
2291                                 __func__, le16_to_cpu(shdr->CreditRequest), scredits);
2292         }
2293
2294         return true;
2295 }
2296
2297 static bool
2298 smb2_is_session_expired(char *buf)
2299 {
2300         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2301
2302         if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED &&
2303             shdr->Status != STATUS_USER_SESSION_DELETED)
2304                 return false;
2305
2306         trace_smb3_ses_expired(le32_to_cpu(shdr->Id.SyncId.TreeId),
2307                                le64_to_cpu(shdr->SessionId),
2308                                le16_to_cpu(shdr->Command),
2309                                le64_to_cpu(shdr->MessageId));
2310         cifs_dbg(FYI, "Session expired or deleted\n");
2311
2312         return true;
2313 }
2314
2315 static bool
2316 smb2_is_status_io_timeout(char *buf)
2317 {
2318         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2319
2320         if (shdr->Status == STATUS_IO_TIMEOUT)
2321                 return true;
2322         else
2323                 return false;
2324 }
2325
2326 static void
2327 smb2_is_network_name_deleted(char *buf, struct TCP_Server_Info *server)
2328 {
2329         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2330         struct TCP_Server_Info *pserver;
2331         struct cifs_ses *ses;
2332         struct cifs_tcon *tcon;
2333
2334         if (shdr->Status != STATUS_NETWORK_NAME_DELETED)
2335                 return;
2336
2337         /* If server is a channel, select the primary channel */
2338         pserver = CIFS_SERVER_IS_CHAN(server) ? server->primary_server : server;
2339
2340         spin_lock(&cifs_tcp_ses_lock);
2341         list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) {
2342                 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
2343                         if (tcon->tid == le32_to_cpu(shdr->Id.SyncId.TreeId)) {
2344                                 spin_lock(&tcon->tc_lock);
2345                                 tcon->need_reconnect = true;
2346                                 spin_unlock(&tcon->tc_lock);
2347                                 spin_unlock(&cifs_tcp_ses_lock);
2348                                 pr_warn_once("Server share %s deleted.\n",
2349                                              tcon->tree_name);
2350                                 return;
2351                         }
2352                 }
2353         }
2354         spin_unlock(&cifs_tcp_ses_lock);
2355 }
2356
2357 static int
2358 smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
2359                      struct cifsInodeInfo *cinode)
2360 {
2361         if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
2362                 return SMB2_lease_break(0, tcon, cinode->lease_key,
2363                                         smb2_get_lease_state(cinode));
2364
2365         return SMB2_oplock_break(0, tcon, fid->persistent_fid,
2366                                  fid->volatile_fid,
2367                                  CIFS_CACHE_READ(cinode) ? 1 : 0);
2368 }
2369
2370 void
2371 smb2_set_related(struct smb_rqst *rqst)
2372 {
2373         struct smb2_hdr *shdr;
2374
2375         shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base);
2376         if (shdr == NULL) {
2377                 cifs_dbg(FYI, "shdr NULL in smb2_set_related\n");
2378                 return;
2379         }
2380         shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
2381 }
2382
2383 char smb2_padding[7] = {0, 0, 0, 0, 0, 0, 0};
2384
2385 void
2386 smb2_set_next_command(struct cifs_tcon *tcon, struct smb_rqst *rqst)
2387 {
2388         struct smb2_hdr *shdr;
2389         struct cifs_ses *ses = tcon->ses;
2390         struct TCP_Server_Info *server = ses->server;
2391         unsigned long len = smb_rqst_len(server, rqst);
2392         int i, num_padding;
2393
2394         shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base);
2395         if (shdr == NULL) {
2396                 cifs_dbg(FYI, "shdr NULL in smb2_set_next_command\n");
2397                 return;
2398         }
2399
2400         /* SMB headers in a compound are 8 byte aligned. */
2401
2402         /* No padding needed */
2403         if (!(len & 7))
2404                 goto finished;
2405
2406         num_padding = 8 - (len & 7);
2407         if (!smb3_encryption_required(tcon)) {
2408                 /*
2409                  * If we do not have encryption then we can just add an extra
2410                  * iov for the padding.
2411                  */
2412                 rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding;
2413                 rqst->rq_iov[rqst->rq_nvec].iov_len = num_padding;
2414                 rqst->rq_nvec++;
2415                 len += num_padding;
2416         } else {
2417                 /*
2418                  * We can not add a small padding iov for the encryption case
2419                  * because the encryption framework can not handle the padding
2420                  * iovs.
2421                  * We have to flatten this into a single buffer and add
2422                  * the padding to it.
2423                  */
2424                 for (i = 1; i < rqst->rq_nvec; i++) {
2425                         memcpy(rqst->rq_iov[0].iov_base +
2426                                rqst->rq_iov[0].iov_len,
2427                                rqst->rq_iov[i].iov_base,
2428                                rqst->rq_iov[i].iov_len);
2429                         rqst->rq_iov[0].iov_len += rqst->rq_iov[i].iov_len;
2430                 }
2431                 memset(rqst->rq_iov[0].iov_base + rqst->rq_iov[0].iov_len,
2432                        0, num_padding);
2433                 rqst->rq_iov[0].iov_len += num_padding;
2434                 len += num_padding;
2435                 rqst->rq_nvec = 1;
2436         }
2437
2438  finished:
2439         shdr->NextCommand = cpu_to_le32(len);
2440 }
2441
2442 /*
2443  * Passes the query info response back to the caller on success.
2444  * Caller need to free this with free_rsp_buf().
2445  */
2446 int
2447 smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon,
2448                          const char *path, u32 desired_access,
2449                          u32 class, u32 type, u32 output_len,
2450                          struct kvec *rsp, int *buftype,
2451                          struct cifs_sb_info *cifs_sb)
2452 {
2453         struct cifs_ses *ses = tcon->ses;
2454         struct TCP_Server_Info *server = cifs_pick_channel(ses);
2455         int flags = CIFS_CP_CREATE_CLOSE_OP;
2456         struct smb_rqst rqst[3];
2457         int resp_buftype[3];
2458         struct kvec rsp_iov[3];
2459         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2460         struct kvec qi_iov[1];
2461         struct kvec close_iov[1];
2462         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2463         struct cifs_open_parms oparms;
2464         struct cifs_fid fid;
2465         int rc;
2466         __le16 *utf16_path;
2467         struct cached_fid *cfid = NULL;
2468
2469         if (!path)
2470                 path = "";
2471         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2472         if (!utf16_path)
2473                 return -ENOMEM;
2474
2475         if (smb3_encryption_required(tcon))
2476                 flags |= CIFS_TRANSFORM_REQ;
2477
2478         memset(rqst, 0, sizeof(rqst));
2479         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
2480         memset(rsp_iov, 0, sizeof(rsp_iov));
2481
2482         /*
2483          * We can only call this for things we know are directories.
2484          */
2485         if (!strcmp(path, ""))
2486                 open_cached_dir(xid, tcon, path, cifs_sb, false,
2487                                 &cfid); /* cfid null if open dir failed */
2488
2489         memset(&open_iov, 0, sizeof(open_iov));
2490         rqst[0].rq_iov = open_iov;
2491         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2492
2493         oparms.tcon = tcon;
2494         oparms.desired_access = desired_access;
2495         oparms.disposition = FILE_OPEN;
2496         oparms.create_options = cifs_create_options(cifs_sb, 0);
2497         oparms.fid = &fid;
2498         oparms.reconnect = false;
2499
2500         rc = SMB2_open_init(tcon, server,
2501                             &rqst[0], &oplock, &oparms, utf16_path);
2502         if (rc)
2503                 goto qic_exit;
2504         smb2_set_next_command(tcon, &rqst[0]);
2505
2506         memset(&qi_iov, 0, sizeof(qi_iov));
2507         rqst[1].rq_iov = qi_iov;
2508         rqst[1].rq_nvec = 1;
2509
2510         if (cfid) {
2511                 rc = SMB2_query_info_init(tcon, server,
2512                                           &rqst[1],
2513                                           cfid->fid.persistent_fid,
2514                                           cfid->fid.volatile_fid,
2515                                           class, type, 0,
2516                                           output_len, 0,
2517                                           NULL);
2518         } else {
2519                 rc = SMB2_query_info_init(tcon, server,
2520                                           &rqst[1],
2521                                           COMPOUND_FID,
2522                                           COMPOUND_FID,
2523                                           class, type, 0,
2524                                           output_len, 0,
2525                                           NULL);
2526         }
2527         if (rc)
2528                 goto qic_exit;
2529         if (!cfid) {
2530                 smb2_set_next_command(tcon, &rqst[1]);
2531                 smb2_set_related(&rqst[1]);
2532         }
2533
2534         memset(&close_iov, 0, sizeof(close_iov));
2535         rqst[2].rq_iov = close_iov;
2536         rqst[2].rq_nvec = 1;
2537
2538         rc = SMB2_close_init(tcon, server,
2539                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
2540         if (rc)
2541                 goto qic_exit;
2542         smb2_set_related(&rqst[2]);
2543
2544         if (cfid) {
2545                 rc = compound_send_recv(xid, ses, server,
2546                                         flags, 1, &rqst[1],
2547                                         &resp_buftype[1], &rsp_iov[1]);
2548         } else {
2549                 rc = compound_send_recv(xid, ses, server,
2550                                         flags, 3, rqst,
2551                                         resp_buftype, rsp_iov);
2552         }
2553         if (rc) {
2554                 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2555                 if (rc == -EREMCHG) {
2556                         tcon->need_reconnect = true;
2557                         pr_warn_once("server share %s deleted\n",
2558                                      tcon->tree_name);
2559                 }
2560                 goto qic_exit;
2561         }
2562         *rsp = rsp_iov[1];
2563         *buftype = resp_buftype[1];
2564
2565  qic_exit:
2566         kfree(utf16_path);
2567         SMB2_open_free(&rqst[0]);
2568         SMB2_query_info_free(&rqst[1]);
2569         SMB2_close_free(&rqst[2]);
2570         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2571         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
2572         if (cfid)
2573                 close_cached_dir(cfid);
2574         return rc;
2575 }
2576
2577 static int
2578 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2579              struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
2580 {
2581         struct smb2_query_info_rsp *rsp;
2582         struct smb2_fs_full_size_info *info = NULL;
2583         struct kvec rsp_iov = {NULL, 0};
2584         int buftype = CIFS_NO_BUFFER;
2585         int rc;
2586
2587
2588         rc = smb2_query_info_compound(xid, tcon, "",
2589                                       FILE_READ_ATTRIBUTES,
2590                                       FS_FULL_SIZE_INFORMATION,
2591                                       SMB2_O_INFO_FILESYSTEM,
2592                                       sizeof(struct smb2_fs_full_size_info),
2593                                       &rsp_iov, &buftype, cifs_sb);
2594         if (rc)
2595                 goto qfs_exit;
2596
2597         rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
2598         buf->f_type = SMB2_SUPER_MAGIC;
2599         info = (struct smb2_fs_full_size_info *)(
2600                 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
2601         rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
2602                                le32_to_cpu(rsp->OutputBufferLength),
2603                                &rsp_iov,
2604                                sizeof(struct smb2_fs_full_size_info));
2605         if (!rc)
2606                 smb2_copy_fs_info_to_kstatfs(info, buf);
2607
2608 qfs_exit:
2609         free_rsp_buf(buftype, rsp_iov.iov_base);
2610         return rc;
2611 }
2612
2613 static int
2614 smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2615                struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
2616 {
2617         int rc;
2618         __le16 srch_path = 0; /* Null - open root of share */
2619         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2620         struct cifs_open_parms oparms;
2621         struct cifs_fid fid;
2622
2623         if (!tcon->posix_extensions)
2624                 return smb2_queryfs(xid, tcon, cifs_sb, buf);
2625
2626         oparms.tcon = tcon;
2627         oparms.desired_access = FILE_READ_ATTRIBUTES;
2628         oparms.disposition = FILE_OPEN;
2629         oparms.create_options = cifs_create_options(cifs_sb, 0);
2630         oparms.fid = &fid;
2631         oparms.reconnect = false;
2632
2633         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
2634                        NULL, NULL);
2635         if (rc)
2636                 return rc;
2637
2638         rc = SMB311_posix_qfs_info(xid, tcon, fid.persistent_fid,
2639                                    fid.volatile_fid, buf);
2640         buf->f_type = SMB2_SUPER_MAGIC;
2641         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2642         return rc;
2643 }
2644
2645 static bool
2646 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
2647 {
2648         return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
2649                ob1->fid.volatile_fid == ob2->fid.volatile_fid;
2650 }
2651
2652 static int
2653 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
2654                __u64 length, __u32 type, int lock, int unlock, bool wait)
2655 {
2656         if (unlock && !lock)
2657                 type = SMB2_LOCKFLAG_UNLOCK;
2658         return SMB2_lock(xid, tlink_tcon(cfile->tlink),
2659                          cfile->fid.persistent_fid, cfile->fid.volatile_fid,
2660                          current->tgid, length, offset, type, wait);
2661 }
2662
2663 static void
2664 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
2665 {
2666         memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
2667 }
2668
2669 static void
2670 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
2671 {
2672         memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
2673 }
2674
2675 static void
2676 smb2_new_lease_key(struct cifs_fid *fid)
2677 {
2678         generate_random_uuid(fid->lease_key);
2679 }
2680
2681 static int
2682 smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
2683                    const char *search_name,
2684                    struct dfs_info3_param **target_nodes,
2685                    unsigned int *num_of_nodes,
2686                    const struct nls_table *nls_codepage, int remap)
2687 {
2688         int rc;
2689         __le16 *utf16_path = NULL;
2690         int utf16_path_len = 0;
2691         struct cifs_tcon *tcon;
2692         struct fsctl_get_dfs_referral_req *dfs_req = NULL;
2693         struct get_dfs_referral_rsp *dfs_rsp = NULL;
2694         u32 dfs_req_size = 0, dfs_rsp_size = 0;
2695         int retry_count = 0;
2696
2697         cifs_dbg(FYI, "%s: path: %s\n", __func__, search_name);
2698
2699         /*
2700          * Try to use the IPC tcon, otherwise just use any
2701          */
2702         tcon = ses->tcon_ipc;
2703         if (tcon == NULL) {
2704                 spin_lock(&cifs_tcp_ses_lock);
2705                 tcon = list_first_entry_or_null(&ses->tcon_list,
2706                                                 struct cifs_tcon,
2707                                                 tcon_list);
2708                 if (tcon)
2709                         tcon->tc_count++;
2710                 spin_unlock(&cifs_tcp_ses_lock);
2711         }
2712
2713         if (tcon == NULL) {
2714                 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n",
2715                          ses);
2716                 rc = -ENOTCONN;
2717                 goto out;
2718         }
2719
2720         utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX,
2721                                            &utf16_path_len,
2722                                            nls_codepage, remap);
2723         if (!utf16_path) {
2724                 rc = -ENOMEM;
2725                 goto out;
2726         }
2727
2728         dfs_req_size = sizeof(*dfs_req) + utf16_path_len;
2729         dfs_req = kzalloc(dfs_req_size, GFP_KERNEL);
2730         if (!dfs_req) {
2731                 rc = -ENOMEM;
2732                 goto out;
2733         }
2734
2735         /* Highest DFS referral version understood */
2736         dfs_req->MaxReferralLevel = DFS_VERSION;
2737
2738         /* Path to resolve in an UTF-16 null-terminated string */
2739         memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len);
2740
2741         do {
2742                 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
2743                                 FSCTL_DFS_GET_REFERRALS,
2744                                 (char *)dfs_req, dfs_req_size, CIFSMaxBufSize,
2745                                 (char **)&dfs_rsp, &dfs_rsp_size);
2746                 if (!is_retryable_error(rc))
2747                         break;
2748                 usleep_range(512, 2048);
2749         } while (++retry_count < 5);
2750
2751         if (rc) {
2752                 if (!is_retryable_error(rc) && rc != -ENOENT && rc != -EOPNOTSUPP)
2753                         cifs_tcon_dbg(VFS, "%s: ioctl error: rc=%d\n", __func__, rc);
2754                 goto out;
2755         }
2756
2757         rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size,
2758                                  num_of_nodes, target_nodes,
2759                                  nls_codepage, remap, search_name,
2760                                  true /* is_unicode */);
2761         if (rc) {
2762                 cifs_tcon_dbg(VFS, "parse error in %s rc=%d\n", __func__, rc);
2763                 goto out;
2764         }
2765
2766  out:
2767         if (tcon && !tcon->ipc) {
2768                 /* ipc tcons are not refcounted */
2769                 spin_lock(&cifs_tcp_ses_lock);
2770                 tcon->tc_count--;
2771                 /* tc_count can never go negative */
2772                 WARN_ON(tcon->tc_count < 0);
2773                 spin_unlock(&cifs_tcp_ses_lock);
2774         }
2775         kfree(utf16_path);
2776         kfree(dfs_req);
2777         kfree(dfs_rsp);
2778         return rc;
2779 }
2780
2781 static int
2782 parse_reparse_posix(struct reparse_posix_data *symlink_buf,
2783                       u32 plen, char **target_path,
2784                       struct cifs_sb_info *cifs_sb)
2785 {
2786         unsigned int len;
2787
2788         /* See MS-FSCC 2.1.2.6 for the 'NFS' style reparse tags */
2789         len = le16_to_cpu(symlink_buf->ReparseDataLength);
2790
2791         if (le64_to_cpu(symlink_buf->InodeType) != NFS_SPECFILE_LNK) {
2792                 cifs_dbg(VFS, "%lld not a supported symlink type\n",
2793                         le64_to_cpu(symlink_buf->InodeType));
2794                 return -EOPNOTSUPP;
2795         }
2796
2797         *target_path = cifs_strndup_from_utf16(
2798                                 symlink_buf->PathBuffer,
2799                                 len, true, cifs_sb->local_nls);
2800         if (!(*target_path))
2801                 return -ENOMEM;
2802
2803         convert_delimiter(*target_path, '/');
2804         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
2805
2806         return 0;
2807 }
2808
2809 static int
2810 parse_reparse_symlink(struct reparse_symlink_data_buffer *symlink_buf,
2811                       u32 plen, char **target_path,
2812                       struct cifs_sb_info *cifs_sb)
2813 {
2814         unsigned int sub_len;
2815         unsigned int sub_offset;
2816
2817         /* We handle Symbolic Link reparse tag here. See: MS-FSCC 2.1.2.4 */
2818
2819         sub_offset = le16_to_cpu(symlink_buf->SubstituteNameOffset);
2820         sub_len = le16_to_cpu(symlink_buf->SubstituteNameLength);
2821         if (sub_offset + 20 > plen ||
2822             sub_offset + sub_len + 20 > plen) {
2823                 cifs_dbg(VFS, "srv returned malformed symlink buffer\n");
2824                 return -EIO;
2825         }
2826
2827         *target_path = cifs_strndup_from_utf16(
2828                                 symlink_buf->PathBuffer + sub_offset,
2829                                 sub_len, true, cifs_sb->local_nls);
2830         if (!(*target_path))
2831                 return -ENOMEM;
2832
2833         convert_delimiter(*target_path, '/');
2834         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
2835
2836         return 0;
2837 }
2838
2839 static int
2840 parse_reparse_point(struct reparse_data_buffer *buf,
2841                     u32 plen, char **target_path,
2842                     struct cifs_sb_info *cifs_sb)
2843 {
2844         if (plen < sizeof(struct reparse_data_buffer)) {
2845                 cifs_dbg(VFS, "reparse buffer is too small. Must be at least 8 bytes but was %d\n",
2846                          plen);
2847                 return -EIO;
2848         }
2849
2850         if (plen < le16_to_cpu(buf->ReparseDataLength) +
2851             sizeof(struct reparse_data_buffer)) {
2852                 cifs_dbg(VFS, "srv returned invalid reparse buf length: %d\n",
2853                          plen);
2854                 return -EIO;
2855         }
2856
2857         /* See MS-FSCC 2.1.2 */
2858         switch (le32_to_cpu(buf->ReparseTag)) {
2859         case IO_REPARSE_TAG_NFS:
2860                 return parse_reparse_posix(
2861                         (struct reparse_posix_data *)buf,
2862                         plen, target_path, cifs_sb);
2863         case IO_REPARSE_TAG_SYMLINK:
2864                 return parse_reparse_symlink(
2865                         (struct reparse_symlink_data_buffer *)buf,
2866                         plen, target_path, cifs_sb);
2867         default:
2868                 cifs_dbg(VFS, "srv returned unknown symlink buffer tag:0x%08x\n",
2869                          le32_to_cpu(buf->ReparseTag));
2870                 return -EOPNOTSUPP;
2871         }
2872 }
2873
2874 static int
2875 smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
2876                    struct cifs_sb_info *cifs_sb, const char *full_path,
2877                    char **target_path, bool is_reparse_point)
2878 {
2879         int rc;
2880         __le16 *utf16_path = NULL;
2881         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2882         struct cifs_open_parms oparms;
2883         struct cifs_fid fid;
2884         struct kvec err_iov = {NULL, 0};
2885         struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
2886         int flags = CIFS_CP_CREATE_CLOSE_OP;
2887         struct smb_rqst rqst[3];
2888         int resp_buftype[3];
2889         struct kvec rsp_iov[3];
2890         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2891         struct kvec io_iov[SMB2_IOCTL_IOV_SIZE];
2892         struct kvec close_iov[1];
2893         struct smb2_create_rsp *create_rsp;
2894         struct smb2_ioctl_rsp *ioctl_rsp;
2895         struct reparse_data_buffer *reparse_buf;
2896         int create_options = is_reparse_point ? OPEN_REPARSE_POINT : 0;
2897         u32 plen;
2898
2899         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
2900
2901         *target_path = NULL;
2902
2903         if (smb3_encryption_required(tcon))
2904                 flags |= CIFS_TRANSFORM_REQ;
2905
2906         memset(rqst, 0, sizeof(rqst));
2907         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
2908         memset(rsp_iov, 0, sizeof(rsp_iov));
2909
2910         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
2911         if (!utf16_path)
2912                 return -ENOMEM;
2913
2914         /* Open */
2915         memset(&open_iov, 0, sizeof(open_iov));
2916         rqst[0].rq_iov = open_iov;
2917         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2918
2919         memset(&oparms, 0, sizeof(oparms));
2920         oparms.tcon = tcon;
2921         oparms.desired_access = FILE_READ_ATTRIBUTES;
2922         oparms.disposition = FILE_OPEN;
2923         oparms.create_options = cifs_create_options(cifs_sb, create_options);
2924         oparms.fid = &fid;
2925         oparms.reconnect = false;
2926
2927         rc = SMB2_open_init(tcon, server,
2928                             &rqst[0], &oplock, &oparms, utf16_path);
2929         if (rc)
2930                 goto querty_exit;
2931         smb2_set_next_command(tcon, &rqst[0]);
2932
2933
2934         /* IOCTL */
2935         memset(&io_iov, 0, sizeof(io_iov));
2936         rqst[1].rq_iov = io_iov;
2937         rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
2938
2939         rc = SMB2_ioctl_init(tcon, server,
2940                              &rqst[1], fid.persistent_fid,
2941                              fid.volatile_fid, FSCTL_GET_REPARSE_POINT, NULL, 0,
2942                              CIFSMaxBufSize -
2943                              MAX_SMB2_CREATE_RESPONSE_SIZE -
2944                              MAX_SMB2_CLOSE_RESPONSE_SIZE);
2945         if (rc)
2946                 goto querty_exit;
2947
2948         smb2_set_next_command(tcon, &rqst[1]);
2949         smb2_set_related(&rqst[1]);
2950
2951
2952         /* Close */
2953         memset(&close_iov, 0, sizeof(close_iov));
2954         rqst[2].rq_iov = close_iov;
2955         rqst[2].rq_nvec = 1;
2956
2957         rc = SMB2_close_init(tcon, server,
2958                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
2959         if (rc)
2960                 goto querty_exit;
2961
2962         smb2_set_related(&rqst[2]);
2963
2964         rc = compound_send_recv(xid, tcon->ses, server,
2965                                 flags, 3, rqst,
2966                                 resp_buftype, rsp_iov);
2967
2968         create_rsp = rsp_iov[0].iov_base;
2969         if (create_rsp && create_rsp->hdr.Status)
2970                 err_iov = rsp_iov[0];
2971         ioctl_rsp = rsp_iov[1].iov_base;
2972
2973         /*
2974          * Open was successful and we got an ioctl response.
2975          */
2976         if ((rc == 0) && (is_reparse_point)) {
2977                 /* See MS-FSCC 2.3.23 */
2978
2979                 reparse_buf = (struct reparse_data_buffer *)
2980                         ((char *)ioctl_rsp +
2981                          le32_to_cpu(ioctl_rsp->OutputOffset));
2982                 plen = le32_to_cpu(ioctl_rsp->OutputCount);
2983
2984                 if (plen + le32_to_cpu(ioctl_rsp->OutputOffset) >
2985                     rsp_iov[1].iov_len) {
2986                         cifs_tcon_dbg(VFS, "srv returned invalid ioctl len: %d\n",
2987                                  plen);
2988                         rc = -EIO;
2989                         goto querty_exit;
2990                 }
2991
2992                 rc = parse_reparse_point(reparse_buf, plen, target_path,
2993                                          cifs_sb);
2994                 goto querty_exit;
2995         }
2996
2997         if (!rc || !err_iov.iov_base) {
2998                 rc = -ENOENT;
2999                 goto querty_exit;
3000         }
3001
3002         rc = smb2_parse_symlink_response(cifs_sb, &err_iov, target_path);
3003
3004  querty_exit:
3005         cifs_dbg(FYI, "query symlink rc %d\n", rc);
3006         kfree(utf16_path);
3007         SMB2_open_free(&rqst[0]);
3008         SMB2_ioctl_free(&rqst[1]);
3009         SMB2_close_free(&rqst[2]);
3010         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
3011         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
3012         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
3013         return rc;
3014 }
3015
3016 int
3017 smb2_query_reparse_tag(const unsigned int xid, struct cifs_tcon *tcon,
3018                    struct cifs_sb_info *cifs_sb, const char *full_path,
3019                    __u32 *tag)
3020 {
3021         int rc;
3022         __le16 *utf16_path = NULL;
3023         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3024         struct cifs_open_parms oparms;
3025         struct cifs_fid fid;
3026         struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
3027         int flags = CIFS_CP_CREATE_CLOSE_OP;
3028         struct smb_rqst rqst[3];
3029         int resp_buftype[3];
3030         struct kvec rsp_iov[3];
3031         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
3032         struct kvec io_iov[SMB2_IOCTL_IOV_SIZE];
3033         struct kvec close_iov[1];
3034         struct smb2_ioctl_rsp *ioctl_rsp;
3035         struct reparse_data_buffer *reparse_buf;
3036         u32 plen;
3037
3038         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
3039
3040         if (smb3_encryption_required(tcon))
3041                 flags |= CIFS_TRANSFORM_REQ;
3042
3043         memset(rqst, 0, sizeof(rqst));
3044         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
3045         memset(rsp_iov, 0, sizeof(rsp_iov));
3046
3047         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
3048         if (!utf16_path)
3049                 return -ENOMEM;
3050
3051         /*
3052          * setup smb2open - TODO add optimization to call cifs_get_readable_path
3053          * to see if there is a handle already open that we can use
3054          */
3055         memset(&open_iov, 0, sizeof(open_iov));
3056         rqst[0].rq_iov = open_iov;
3057         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
3058
3059         memset(&oparms, 0, sizeof(oparms));
3060         oparms.tcon = tcon;
3061         oparms.desired_access = FILE_READ_ATTRIBUTES;
3062         oparms.disposition = FILE_OPEN;
3063         oparms.create_options = cifs_create_options(cifs_sb, OPEN_REPARSE_POINT);
3064         oparms.fid = &fid;
3065         oparms.reconnect = false;
3066
3067         rc = SMB2_open_init(tcon, server,
3068                             &rqst[0], &oplock, &oparms, utf16_path);
3069         if (rc)
3070                 goto query_rp_exit;
3071         smb2_set_next_command(tcon, &rqst[0]);
3072
3073
3074         /* IOCTL */
3075         memset(&io_iov, 0, sizeof(io_iov));
3076         rqst[1].rq_iov = io_iov;
3077         rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
3078
3079         rc = SMB2_ioctl_init(tcon, server,
3080                              &rqst[1], COMPOUND_FID,
3081                              COMPOUND_FID, FSCTL_GET_REPARSE_POINT, NULL, 0,
3082                              CIFSMaxBufSize -
3083                              MAX_SMB2_CREATE_RESPONSE_SIZE -
3084                              MAX_SMB2_CLOSE_RESPONSE_SIZE);
3085         if (rc)
3086                 goto query_rp_exit;
3087
3088         smb2_set_next_command(tcon, &rqst[1]);
3089         smb2_set_related(&rqst[1]);
3090
3091
3092         /* Close */
3093         memset(&close_iov, 0, sizeof(close_iov));
3094         rqst[2].rq_iov = close_iov;
3095         rqst[2].rq_nvec = 1;
3096
3097         rc = SMB2_close_init(tcon, server,
3098                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
3099         if (rc)
3100                 goto query_rp_exit;
3101
3102         smb2_set_related(&rqst[2]);
3103
3104         rc = compound_send_recv(xid, tcon->ses, server,
3105                                 flags, 3, rqst,
3106                                 resp_buftype, rsp_iov);
3107
3108         ioctl_rsp = rsp_iov[1].iov_base;
3109
3110         /*
3111          * Open was successful and we got an ioctl response.
3112          */
3113         if (rc == 0) {
3114                 /* See MS-FSCC 2.3.23 */
3115
3116                 reparse_buf = (struct reparse_data_buffer *)
3117                         ((char *)ioctl_rsp +
3118                          le32_to_cpu(ioctl_rsp->OutputOffset));
3119                 plen = le32_to_cpu(ioctl_rsp->OutputCount);
3120
3121                 if (plen + le32_to_cpu(ioctl_rsp->OutputOffset) >
3122                     rsp_iov[1].iov_len) {
3123                         cifs_tcon_dbg(FYI, "srv returned invalid ioctl len: %d\n",
3124                                  plen);
3125                         rc = -EIO;
3126                         goto query_rp_exit;
3127                 }
3128                 *tag = le32_to_cpu(reparse_buf->ReparseTag);
3129         }
3130
3131  query_rp_exit:
3132         kfree(utf16_path);
3133         SMB2_open_free(&rqst[0]);
3134         SMB2_ioctl_free(&rqst[1]);
3135         SMB2_close_free(&rqst[2]);
3136         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
3137         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
3138         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
3139         return rc;
3140 }
3141
3142 static struct cifs_ntsd *
3143 get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb,
3144                     const struct cifs_fid *cifsfid, u32 *pacllen, u32 info)
3145 {
3146         struct cifs_ntsd *pntsd = NULL;
3147         unsigned int xid;
3148         int rc = -EOPNOTSUPP;
3149         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3150
3151         if (IS_ERR(tlink))
3152                 return ERR_CAST(tlink);
3153
3154         xid = get_xid();
3155         cifs_dbg(FYI, "trying to get acl\n");
3156
3157         rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid,
3158                             cifsfid->volatile_fid, (void **)&pntsd, pacllen,
3159                             info);
3160         free_xid(xid);
3161
3162         cifs_put_tlink(tlink);
3163
3164         cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
3165         if (rc)
3166                 return ERR_PTR(rc);
3167         return pntsd;
3168
3169 }
3170
3171 static struct cifs_ntsd *
3172 get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb,
3173                      const char *path, u32 *pacllen, u32 info)
3174 {
3175         struct cifs_ntsd *pntsd = NULL;
3176         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3177         unsigned int xid;
3178         int rc;
3179         struct cifs_tcon *tcon;
3180         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3181         struct cifs_fid fid;
3182         struct cifs_open_parms oparms;
3183         __le16 *utf16_path;
3184
3185         cifs_dbg(FYI, "get smb3 acl for path %s\n", path);
3186         if (IS_ERR(tlink))
3187                 return ERR_CAST(tlink);
3188
3189         tcon = tlink_tcon(tlink);
3190         xid = get_xid();
3191
3192         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
3193         if (!utf16_path) {
3194                 rc = -ENOMEM;
3195                 free_xid(xid);
3196                 return ERR_PTR(rc);
3197         }
3198
3199         oparms.tcon = tcon;
3200         oparms.desired_access = READ_CONTROL;
3201         oparms.disposition = FILE_OPEN;
3202         /*
3203          * When querying an ACL, even if the file is a symlink we want to open
3204          * the source not the target, and so the protocol requires that the
3205          * client specify this flag when opening a reparse point
3206          */
3207         oparms.create_options = cifs_create_options(cifs_sb, 0) | OPEN_REPARSE_POINT;
3208         oparms.fid = &fid;
3209         oparms.reconnect = false;
3210
3211         if (info & SACL_SECINFO)
3212                 oparms.desired_access |= SYSTEM_SECURITY;
3213
3214         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
3215                        NULL);
3216         kfree(utf16_path);
3217         if (!rc) {
3218                 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3219                                     fid.volatile_fid, (void **)&pntsd, pacllen,
3220                                     info);
3221                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3222         }
3223
3224         cifs_put_tlink(tlink);
3225         free_xid(xid);
3226
3227         cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
3228         if (rc)
3229                 return ERR_PTR(rc);
3230         return pntsd;
3231 }
3232
3233 static int
3234 set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
3235                 struct inode *inode, const char *path, int aclflag)
3236 {
3237         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3238         unsigned int xid;
3239         int rc, access_flags = 0;
3240         struct cifs_tcon *tcon;
3241         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
3242         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3243         struct cifs_fid fid;
3244         struct cifs_open_parms oparms;
3245         __le16 *utf16_path;
3246
3247         cifs_dbg(FYI, "set smb3 acl for path %s\n", path);
3248         if (IS_ERR(tlink))
3249                 return PTR_ERR(tlink);
3250
3251         tcon = tlink_tcon(tlink);
3252         xid = get_xid();
3253
3254         if (aclflag & CIFS_ACL_OWNER || aclflag & CIFS_ACL_GROUP)
3255                 access_flags |= WRITE_OWNER;
3256         if (aclflag & CIFS_ACL_SACL)
3257                 access_flags |= SYSTEM_SECURITY;
3258         if (aclflag & CIFS_ACL_DACL)
3259                 access_flags |= WRITE_DAC;
3260
3261         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
3262         if (!utf16_path) {
3263                 rc = -ENOMEM;
3264                 free_xid(xid);
3265                 return rc;
3266         }
3267
3268         oparms.tcon = tcon;
3269         oparms.desired_access = access_flags;
3270         oparms.create_options = cifs_create_options(cifs_sb, 0);
3271         oparms.disposition = FILE_OPEN;
3272         oparms.path = path;
3273         oparms.fid = &fid;
3274         oparms.reconnect = false;
3275
3276         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL,
3277                        NULL, NULL);
3278         kfree(utf16_path);
3279         if (!rc) {
3280                 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3281                             fid.volatile_fid, pnntsd, acllen, aclflag);
3282                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3283         }
3284
3285         cifs_put_tlink(tlink);
3286         free_xid(xid);
3287         return rc;
3288 }
3289
3290 /* Retrieve an ACL from the server */
3291 static struct cifs_ntsd *
3292 get_smb2_acl(struct cifs_sb_info *cifs_sb,
3293              struct inode *inode, const char *path,
3294              u32 *pacllen, u32 info)
3295 {
3296         struct cifs_ntsd *pntsd = NULL;
3297         struct cifsFileInfo *open_file = NULL;
3298
3299         if (inode && !(info & SACL_SECINFO))
3300                 open_file = find_readable_file(CIFS_I(inode), true);
3301         if (!open_file || (info & SACL_SECINFO))
3302                 return get_smb2_acl_by_path(cifs_sb, path, pacllen, info);
3303
3304         pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen, info);
3305         cifsFileInfo_put(open_file);
3306         return pntsd;
3307 }
3308
3309 static long smb3_zero_data(struct file *file, struct cifs_tcon *tcon,
3310                              loff_t offset, loff_t len, unsigned int xid)
3311 {
3312         struct cifsFileInfo *cfile = file->private_data;
3313         struct file_zero_data_information fsctl_buf;
3314
3315         cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3316
3317         fsctl_buf.FileOffset = cpu_to_le64(offset);
3318         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3319
3320         return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3321                           cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
3322                           (char *)&fsctl_buf,
3323                           sizeof(struct file_zero_data_information),
3324                           0, NULL, NULL);
3325 }
3326
3327 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
3328                             loff_t offset, loff_t len, bool keep_size)
3329 {
3330         struct cifs_ses *ses = tcon->ses;
3331         struct inode *inode = file_inode(file);
3332         struct cifsInodeInfo *cifsi = CIFS_I(inode);
3333         struct cifsFileInfo *cfile = file->private_data;
3334         long rc;
3335         unsigned int xid;
3336         __le64 eof;
3337
3338         xid = get_xid();
3339
3340         trace_smb3_zero_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3341                               ses->Suid, offset, len);
3342
3343         inode_lock(inode);
3344         filemap_invalidate_lock(inode->i_mapping);
3345
3346         /*
3347          * We zero the range through ioctl, so we need remove the page caches
3348          * first, otherwise the data may be inconsistent with the server.
3349          */
3350         truncate_pagecache_range(inode, offset, offset + len - 1);
3351
3352         /* if file not oplocked can't be sure whether asking to extend size */
3353         rc = -EOPNOTSUPP;
3354         if (keep_size == false && !CIFS_CACHE_READ(cifsi))
3355                 goto zero_range_exit;
3356
3357         rc = smb3_zero_data(file, tcon, offset, len, xid);
3358         if (rc < 0)
3359                 goto zero_range_exit;
3360
3361         /*
3362          * do we also need to change the size of the file?
3363          */
3364         if (keep_size == false && i_size_read(inode) < offset + len) {
3365                 eof = cpu_to_le64(offset + len);
3366                 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3367                                   cfile->fid.volatile_fid, cfile->pid, &eof);
3368         }
3369
3370  zero_range_exit:
3371         filemap_invalidate_unlock(inode->i_mapping);
3372         inode_unlock(inode);
3373         free_xid(xid);
3374         if (rc)
3375                 trace_smb3_zero_err(xid, cfile->fid.persistent_fid, tcon->tid,
3376                               ses->Suid, offset, len, rc);
3377         else
3378                 trace_smb3_zero_done(xid, cfile->fid.persistent_fid, tcon->tid,
3379                               ses->Suid, offset, len);
3380         return rc;
3381 }
3382
3383 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
3384                             loff_t offset, loff_t len)
3385 {
3386         struct inode *inode = file_inode(file);
3387         struct cifsFileInfo *cfile = file->private_data;
3388         struct file_zero_data_information fsctl_buf;
3389         long rc;
3390         unsigned int xid;
3391         __u8 set_sparse = 1;
3392
3393         xid = get_xid();
3394
3395         inode_lock(inode);
3396         /* Need to make file sparse, if not already, before freeing range. */
3397         /* Consider adding equivalent for compressed since it could also work */
3398         if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) {
3399                 rc = -EOPNOTSUPP;
3400                 goto out;
3401         }
3402
3403         filemap_invalidate_lock(inode->i_mapping);
3404         /*
3405          * We implement the punch hole through ioctl, so we need remove the page
3406          * caches first, otherwise the data may be inconsistent with the server.
3407          */
3408         truncate_pagecache_range(inode, offset, offset + len - 1);
3409
3410         cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3411
3412         fsctl_buf.FileOffset = cpu_to_le64(offset);
3413         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3414
3415         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3416                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
3417                         (char *)&fsctl_buf,
3418                         sizeof(struct file_zero_data_information),
3419                         CIFSMaxBufSize, NULL, NULL);
3420         filemap_invalidate_unlock(inode->i_mapping);
3421 out:
3422         inode_unlock(inode);
3423         free_xid(xid);
3424         return rc;
3425 }
3426
3427 static int smb3_simple_fallocate_write_range(unsigned int xid,
3428                                              struct cifs_tcon *tcon,
3429                                              struct cifsFileInfo *cfile,
3430                                              loff_t off, loff_t len,
3431                                              char *buf)
3432 {
3433         struct cifs_io_parms io_parms = {0};
3434         int nbytes;
3435         int rc = 0;
3436         struct kvec iov[2];
3437
3438         io_parms.netfid = cfile->fid.netfid;
3439         io_parms.pid = current->tgid;
3440         io_parms.tcon = tcon;
3441         io_parms.persistent_fid = cfile->fid.persistent_fid;
3442         io_parms.volatile_fid = cfile->fid.volatile_fid;
3443
3444         while (len) {
3445                 io_parms.offset = off;
3446                 io_parms.length = len;
3447                 if (io_parms.length > SMB2_MAX_BUFFER_SIZE)
3448                         io_parms.length = SMB2_MAX_BUFFER_SIZE;
3449                 /* iov[0] is reserved for smb header */
3450                 iov[1].iov_base = buf;
3451                 iov[1].iov_len = io_parms.length;
3452                 rc = SMB2_write(xid, &io_parms, &nbytes, iov, 1);
3453                 if (rc)
3454                         break;
3455                 if (nbytes > len)
3456                         return -EINVAL;
3457                 buf += nbytes;
3458                 off += nbytes;
3459                 len -= nbytes;
3460         }
3461         return rc;
3462 }
3463
3464 static int smb3_simple_fallocate_range(unsigned int xid,
3465                                        struct cifs_tcon *tcon,
3466                                        struct cifsFileInfo *cfile,
3467                                        loff_t off, loff_t len)
3468 {
3469         struct file_allocated_range_buffer in_data, *out_data = NULL, *tmp_data;
3470         u32 out_data_len;
3471         char *buf = NULL;
3472         loff_t l;
3473         int rc;
3474
3475         in_data.file_offset = cpu_to_le64(off);
3476         in_data.length = cpu_to_le64(len);
3477         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3478                         cfile->fid.volatile_fid,
3479                         FSCTL_QUERY_ALLOCATED_RANGES,
3480                         (char *)&in_data, sizeof(in_data),
3481                         1024 * sizeof(struct file_allocated_range_buffer),
3482                         (char **)&out_data, &out_data_len);
3483         if (rc)
3484                 goto out;
3485
3486         buf = kzalloc(1024 * 1024, GFP_KERNEL);
3487         if (buf == NULL) {
3488                 rc = -ENOMEM;
3489                 goto out;
3490         }
3491
3492         tmp_data = out_data;
3493         while (len) {
3494                 /*
3495                  * The rest of the region is unmapped so write it all.
3496                  */
3497                 if (out_data_len == 0) {
3498                         rc = smb3_simple_fallocate_write_range(xid, tcon,
3499                                                cfile, off, len, buf);
3500                         goto out;
3501                 }
3502
3503                 if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3504                         rc = -EINVAL;
3505                         goto out;
3506                 }
3507
3508                 if (off < le64_to_cpu(tmp_data->file_offset)) {
3509                         /*
3510                          * We are at a hole. Write until the end of the region
3511                          * or until the next allocated data,
3512                          * whichever comes next.
3513                          */
3514                         l = le64_to_cpu(tmp_data->file_offset) - off;
3515                         if (len < l)
3516                                 l = len;
3517                         rc = smb3_simple_fallocate_write_range(xid, tcon,
3518                                                cfile, off, l, buf);
3519                         if (rc)
3520                                 goto out;
3521                         off = off + l;
3522                         len = len - l;
3523                         if (len == 0)
3524                                 goto out;
3525                 }
3526                 /*
3527                  * We are at a section of allocated data, just skip forward
3528                  * until the end of the data or the end of the region
3529                  * we are supposed to fallocate, whichever comes first.
3530                  */
3531                 l = le64_to_cpu(tmp_data->length);
3532                 if (len < l)
3533                         l = len;
3534                 off += l;
3535                 len -= l;
3536
3537                 tmp_data = &tmp_data[1];
3538                 out_data_len -= sizeof(struct file_allocated_range_buffer);
3539         }
3540
3541  out:
3542         kfree(out_data);
3543         kfree(buf);
3544         return rc;
3545 }
3546
3547
3548 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
3549                             loff_t off, loff_t len, bool keep_size)
3550 {
3551         struct inode *inode;
3552         struct cifsInodeInfo *cifsi;
3553         struct cifsFileInfo *cfile = file->private_data;
3554         long rc = -EOPNOTSUPP;
3555         unsigned int xid;
3556         __le64 eof;
3557
3558         xid = get_xid();
3559
3560         inode = d_inode(cfile->dentry);
3561         cifsi = CIFS_I(inode);
3562
3563         trace_smb3_falloc_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3564                                 tcon->ses->Suid, off, len);
3565         /* if file not oplocked can't be sure whether asking to extend size */
3566         if (!CIFS_CACHE_READ(cifsi))
3567                 if (keep_size == false) {
3568                         trace_smb3_falloc_err(xid, cfile->fid.persistent_fid,
3569                                 tcon->tid, tcon->ses->Suid, off, len, rc);
3570                         free_xid(xid);
3571                         return rc;
3572                 }
3573
3574         /*
3575          * Extending the file
3576          */
3577         if ((keep_size == false) && i_size_read(inode) < off + len) {
3578                 rc = inode_newsize_ok(inode, off + len);
3579                 if (rc)
3580                         goto out;
3581
3582                 if (cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)
3583                         smb2_set_sparse(xid, tcon, cfile, inode, false);
3584
3585                 eof = cpu_to_le64(off + len);
3586                 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3587                                   cfile->fid.volatile_fid, cfile->pid, &eof);
3588                 if (rc == 0) {
3589                         cifsi->server_eof = off + len;
3590                         cifs_setsize(inode, off + len);
3591                         cifs_truncate_page(inode->i_mapping, inode->i_size);
3592                         truncate_setsize(inode, off + len);
3593                 }
3594                 goto out;
3595         }
3596
3597         /*
3598          * Files are non-sparse by default so falloc may be a no-op
3599          * Must check if file sparse. If not sparse, and since we are not
3600          * extending then no need to do anything since file already allocated
3601          */
3602         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
3603                 rc = 0;
3604                 goto out;
3605         }
3606
3607         if (keep_size == true) {
3608                 /*
3609                  * We can not preallocate pages beyond the end of the file
3610                  * in SMB2
3611                  */
3612                 if (off >= i_size_read(inode)) {
3613                         rc = 0;
3614                         goto out;
3615                 }
3616                 /*
3617                  * For fallocates that are partially beyond the end of file,
3618                  * clamp len so we only fallocate up to the end of file.
3619                  */
3620                 if (off + len > i_size_read(inode)) {
3621                         len = i_size_read(inode) - off;
3622                 }
3623         }
3624
3625         if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
3626                 /*
3627                  * At this point, we are trying to fallocate an internal
3628                  * regions of a sparse file. Since smb2 does not have a
3629                  * fallocate command we have two otions on how to emulate this.
3630                  * We can either turn the entire file to become non-sparse
3631                  * which we only do if the fallocate is for virtually
3632                  * the whole file,  or we can overwrite the region with zeroes
3633                  * using SMB2_write, which could be prohibitevly expensive
3634                  * if len is large.
3635                  */
3636                 /*
3637                  * We are only trying to fallocate a small region so
3638                  * just write it with zero.
3639                  */
3640                 if (len <= 1024 * 1024) {
3641                         rc = smb3_simple_fallocate_range(xid, tcon, cfile,
3642                                                          off, len);
3643                         goto out;
3644                 }
3645
3646                 /*
3647                  * Check if falloc starts within first few pages of file
3648                  * and ends within a few pages of the end of file to
3649                  * ensure that most of file is being forced to be
3650                  * fallocated now. If so then setting whole file sparse
3651                  * ie potentially making a few extra pages at the beginning
3652                  * or end of the file non-sparse via set_sparse is harmless.
3653                  */
3654                 if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) {
3655                         rc = -EOPNOTSUPP;
3656                         goto out;
3657                 }
3658         }
3659
3660         smb2_set_sparse(xid, tcon, cfile, inode, false);
3661         rc = 0;
3662
3663 out:
3664         if (rc)
3665                 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid,
3666                                 tcon->ses->Suid, off, len, rc);
3667         else
3668                 trace_smb3_falloc_done(xid, cfile->fid.persistent_fid, tcon->tid,
3669                                 tcon->ses->Suid, off, len);
3670
3671         free_xid(xid);
3672         return rc;
3673 }
3674
3675 static long smb3_collapse_range(struct file *file, struct cifs_tcon *tcon,
3676                             loff_t off, loff_t len)
3677 {
3678         int rc;
3679         unsigned int xid;
3680         struct inode *inode = file_inode(file);
3681         struct cifsFileInfo *cfile = file->private_data;
3682         struct cifsInodeInfo *cifsi = CIFS_I(inode);
3683         __le64 eof;
3684         loff_t old_eof;
3685
3686         xid = get_xid();
3687
3688         inode_lock(inode);
3689
3690         old_eof = i_size_read(inode);
3691         if ((off >= old_eof) ||
3692             off + len >= old_eof) {
3693                 rc = -EINVAL;
3694                 goto out;
3695         }
3696
3697         filemap_invalidate_lock(inode->i_mapping);
3698         rc = filemap_write_and_wait_range(inode->i_mapping, off, old_eof - 1);
3699         if (rc < 0)
3700                 goto out_2;
3701
3702         truncate_pagecache_range(inode, off, old_eof);
3703
3704         rc = smb2_copychunk_range(xid, cfile, cfile, off + len,
3705                                   old_eof - off - len, off);
3706         if (rc < 0)
3707                 goto out_2;
3708
3709         eof = cpu_to_le64(old_eof - len);
3710         rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3711                           cfile->fid.volatile_fid, cfile->pid, &eof);
3712         if (rc < 0)
3713                 goto out_2;
3714
3715         rc = 0;
3716
3717         cifsi->server_eof = i_size_read(inode) - len;
3718         truncate_setsize(inode, cifsi->server_eof);
3719         fscache_resize_cookie(cifs_inode_cookie(inode), cifsi->server_eof);
3720 out_2:
3721         filemap_invalidate_unlock(inode->i_mapping);
3722  out:
3723         inode_unlock(inode);
3724         free_xid(xid);
3725         return rc;
3726 }
3727
3728 static long smb3_insert_range(struct file *file, struct cifs_tcon *tcon,
3729                               loff_t off, loff_t len)
3730 {
3731         int rc;
3732         unsigned int xid;
3733         struct cifsFileInfo *cfile = file->private_data;
3734         struct inode *inode = file_inode(file);
3735         __le64 eof;
3736         __u64  count, old_eof;
3737
3738         xid = get_xid();
3739
3740         inode_lock(inode);
3741
3742         old_eof = i_size_read(inode);
3743         if (off >= old_eof) {
3744                 rc = -EINVAL;
3745                 goto out;
3746         }
3747
3748         count = old_eof - off;
3749         eof = cpu_to_le64(old_eof + len);
3750
3751         filemap_invalidate_lock(inode->i_mapping);
3752         rc = filemap_write_and_wait_range(inode->i_mapping, off, old_eof + len - 1);
3753         if (rc < 0)
3754                 goto out_2;
3755         truncate_pagecache_range(inode, off, old_eof);
3756
3757         rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3758                           cfile->fid.volatile_fid, cfile->pid, &eof);
3759         if (rc < 0)
3760                 goto out_2;
3761
3762         rc = smb2_copychunk_range(xid, cfile, cfile, off, count, off + len);
3763         if (rc < 0)
3764                 goto out_2;
3765
3766         rc = smb3_zero_data(file, tcon, off, len, xid);
3767         if (rc < 0)
3768                 goto out_2;
3769
3770         rc = 0;
3771 out_2:
3772         filemap_invalidate_unlock(inode->i_mapping);
3773  out:
3774         inode_unlock(inode);
3775         free_xid(xid);
3776         return rc;
3777 }
3778
3779 static loff_t smb3_llseek(struct file *file, struct cifs_tcon *tcon, loff_t offset, int whence)
3780 {
3781         struct cifsFileInfo *wrcfile, *cfile = file->private_data;
3782         struct cifsInodeInfo *cifsi;
3783         struct inode *inode;
3784         int rc = 0;
3785         struct file_allocated_range_buffer in_data, *out_data = NULL;
3786         u32 out_data_len;
3787         unsigned int xid;
3788
3789         if (whence != SEEK_HOLE && whence != SEEK_DATA)
3790                 return generic_file_llseek(file, offset, whence);
3791
3792         inode = d_inode(cfile->dentry);
3793         cifsi = CIFS_I(inode);
3794
3795         if (offset < 0 || offset >= i_size_read(inode))
3796                 return -ENXIO;
3797
3798         xid = get_xid();
3799         /*
3800          * We need to be sure that all dirty pages are written as they
3801          * might fill holes on the server.
3802          * Note that we also MUST flush any written pages since at least
3803          * some servers (Windows2016) will not reflect recent writes in
3804          * QUERY_ALLOCATED_RANGES until SMB2_flush is called.
3805          */
3806         wrcfile = find_writable_file(cifsi, FIND_WR_ANY);
3807         if (wrcfile) {
3808                 filemap_write_and_wait(inode->i_mapping);
3809                 smb2_flush_file(xid, tcon, &wrcfile->fid);
3810                 cifsFileInfo_put(wrcfile);
3811         }
3812
3813         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) {
3814                 if (whence == SEEK_HOLE)
3815                         offset = i_size_read(inode);
3816                 goto lseek_exit;
3817         }
3818
3819         in_data.file_offset = cpu_to_le64(offset);
3820         in_data.length = cpu_to_le64(i_size_read(inode));
3821
3822         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3823                         cfile->fid.volatile_fid,
3824                         FSCTL_QUERY_ALLOCATED_RANGES,
3825                         (char *)&in_data, sizeof(in_data),
3826                         sizeof(struct file_allocated_range_buffer),
3827                         (char **)&out_data, &out_data_len);
3828         if (rc == -E2BIG)
3829                 rc = 0;
3830         if (rc)
3831                 goto lseek_exit;
3832
3833         if (whence == SEEK_HOLE && out_data_len == 0)
3834                 goto lseek_exit;
3835
3836         if (whence == SEEK_DATA && out_data_len == 0) {
3837                 rc = -ENXIO;
3838                 goto lseek_exit;
3839         }
3840
3841         if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3842                 rc = -EINVAL;
3843                 goto lseek_exit;
3844         }
3845         if (whence == SEEK_DATA) {
3846                 offset = le64_to_cpu(out_data->file_offset);
3847                 goto lseek_exit;
3848         }
3849         if (offset < le64_to_cpu(out_data->file_offset))
3850                 goto lseek_exit;
3851
3852         offset = le64_to_cpu(out_data->file_offset) + le64_to_cpu(out_data->length);
3853
3854  lseek_exit:
3855         free_xid(xid);
3856         kfree(out_data);
3857         if (!rc)
3858                 return vfs_setpos(file, offset, inode->i_sb->s_maxbytes);
3859         else
3860                 return rc;
3861 }
3862
3863 static int smb3_fiemap(struct cifs_tcon *tcon,
3864                        struct cifsFileInfo *cfile,
3865                        struct fiemap_extent_info *fei, u64 start, u64 len)
3866 {
3867         unsigned int xid;
3868         struct file_allocated_range_buffer in_data, *out_data;
3869         u32 out_data_len;
3870         int i, num, rc, flags, last_blob;
3871         u64 next;
3872
3873         rc = fiemap_prep(d_inode(cfile->dentry), fei, start, &len, 0);
3874         if (rc)
3875                 return rc;
3876
3877         xid = get_xid();
3878  again:
3879         in_data.file_offset = cpu_to_le64(start);
3880         in_data.length = cpu_to_le64(len);
3881
3882         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3883                         cfile->fid.volatile_fid,
3884                         FSCTL_QUERY_ALLOCATED_RANGES,
3885                         (char *)&in_data, sizeof(in_data),
3886                         1024 * sizeof(struct file_allocated_range_buffer),
3887                         (char **)&out_data, &out_data_len);
3888         if (rc == -E2BIG) {
3889                 last_blob = 0;
3890                 rc = 0;
3891         } else
3892                 last_blob = 1;
3893         if (rc)
3894                 goto out;
3895
3896         if (out_data_len && out_data_len < sizeof(struct file_allocated_range_buffer)) {
3897                 rc = -EINVAL;
3898                 goto out;
3899         }
3900         if (out_data_len % sizeof(struct file_allocated_range_buffer)) {
3901                 rc = -EINVAL;
3902                 goto out;
3903         }
3904
3905         num = out_data_len / sizeof(struct file_allocated_range_buffer);
3906         for (i = 0; i < num; i++) {
3907                 flags = 0;
3908                 if (i == num - 1 && last_blob)
3909                         flags |= FIEMAP_EXTENT_LAST;
3910
3911                 rc = fiemap_fill_next_extent(fei,
3912                                 le64_to_cpu(out_data[i].file_offset),
3913                                 le64_to_cpu(out_data[i].file_offset),
3914                                 le64_to_cpu(out_data[i].length),
3915                                 flags);
3916                 if (rc < 0)
3917                         goto out;
3918                 if (rc == 1) {
3919                         rc = 0;
3920                         goto out;
3921                 }
3922         }
3923
3924         if (!last_blob) {
3925                 next = le64_to_cpu(out_data[num - 1].file_offset) +
3926                   le64_to_cpu(out_data[num - 1].length);
3927                 len = len - (next - start);
3928                 start = next;
3929                 goto again;
3930         }
3931
3932  out:
3933         free_xid(xid);
3934         kfree(out_data);
3935         return rc;
3936 }
3937
3938 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
3939                            loff_t off, loff_t len)
3940 {
3941         /* KEEP_SIZE already checked for by do_fallocate */
3942         if (mode & FALLOC_FL_PUNCH_HOLE)
3943                 return smb3_punch_hole(file, tcon, off, len);
3944         else if (mode & FALLOC_FL_ZERO_RANGE) {
3945                 if (mode & FALLOC_FL_KEEP_SIZE)
3946                         return smb3_zero_range(file, tcon, off, len, true);
3947                 return smb3_zero_range(file, tcon, off, len, false);
3948         } else if (mode == FALLOC_FL_KEEP_SIZE)
3949                 return smb3_simple_falloc(file, tcon, off, len, true);
3950         else if (mode == FALLOC_FL_COLLAPSE_RANGE)
3951                 return smb3_collapse_range(file, tcon, off, len);
3952         else if (mode == FALLOC_FL_INSERT_RANGE)
3953                 return smb3_insert_range(file, tcon, off, len);
3954         else if (mode == 0)
3955                 return smb3_simple_falloc(file, tcon, off, len, false);
3956
3957         return -EOPNOTSUPP;
3958 }
3959
3960 static void
3961 smb2_downgrade_oplock(struct TCP_Server_Info *server,
3962                       struct cifsInodeInfo *cinode, __u32 oplock,
3963                       unsigned int epoch, bool *purge_cache)
3964 {
3965         server->ops->set_oplock_level(cinode, oplock, 0, NULL);
3966 }
3967
3968 static void
3969 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3970                        unsigned int epoch, bool *purge_cache);
3971
3972 static void
3973 smb3_downgrade_oplock(struct TCP_Server_Info *server,
3974                        struct cifsInodeInfo *cinode, __u32 oplock,
3975                        unsigned int epoch, bool *purge_cache)
3976 {
3977         unsigned int old_state = cinode->oplock;
3978         unsigned int old_epoch = cinode->epoch;
3979         unsigned int new_state;
3980
3981         if (epoch > old_epoch) {
3982                 smb21_set_oplock_level(cinode, oplock, 0, NULL);
3983                 cinode->epoch = epoch;
3984         }
3985
3986         new_state = cinode->oplock;
3987         *purge_cache = false;
3988
3989         if ((old_state & CIFS_CACHE_READ_FLG) != 0 &&
3990             (new_state & CIFS_CACHE_READ_FLG) == 0)
3991                 *purge_cache = true;
3992         else if (old_state == new_state && (epoch - old_epoch > 1))
3993                 *purge_cache = true;
3994 }
3995
3996 static void
3997 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3998                       unsigned int epoch, bool *purge_cache)
3999 {
4000         oplock &= 0xFF;
4001         cinode->lease_granted = false;
4002         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
4003                 return;
4004         if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
4005                 cinode->oplock = CIFS_CACHE_RHW_FLG;
4006                 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
4007                          &cinode->netfs.inode);
4008         } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
4009                 cinode->oplock = CIFS_CACHE_RW_FLG;
4010                 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
4011                          &cinode->netfs.inode);
4012         } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
4013                 cinode->oplock = CIFS_CACHE_READ_FLG;
4014                 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
4015                          &cinode->netfs.inode);
4016         } else
4017                 cinode->oplock = 0;
4018 }
4019
4020 static void
4021 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
4022                        unsigned int epoch, bool *purge_cache)
4023 {
4024         char message[5] = {0};
4025         unsigned int new_oplock = 0;
4026
4027         oplock &= 0xFF;
4028         cinode->lease_granted = true;
4029         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
4030                 return;
4031
4032         /* Check if the server granted an oplock rather than a lease */
4033         if (oplock & SMB2_OPLOCK_LEVEL_EXCLUSIVE)
4034                 return smb2_set_oplock_level(cinode, oplock, epoch,
4035                                              purge_cache);
4036
4037         if (oplock & SMB2_LEASE_READ_CACHING_HE) {
4038                 new_oplock |= CIFS_CACHE_READ_FLG;
4039                 strcat(message, "R");
4040         }
4041         if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
4042                 new_oplock |= CIFS_CACHE_HANDLE_FLG;
4043                 strcat(message, "H");
4044         }
4045         if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
4046                 new_oplock |= CIFS_CACHE_WRITE_FLG;
4047                 strcat(message, "W");
4048         }
4049         if (!new_oplock)
4050                 strncpy(message, "None", sizeof(message));
4051
4052         cinode->oplock = new_oplock;
4053         cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
4054                  &cinode->netfs.inode);
4055 }
4056
4057 static void
4058 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
4059                       unsigned int epoch, bool *purge_cache)
4060 {
4061         unsigned int old_oplock = cinode->oplock;
4062
4063         smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
4064
4065         if (purge_cache) {
4066                 *purge_cache = false;
4067                 if (old_oplock == CIFS_CACHE_READ_FLG) {
4068                         if (cinode->oplock == CIFS_CACHE_READ_FLG &&
4069                             (epoch - cinode->epoch > 0))
4070                                 *purge_cache = true;
4071                         else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
4072                                  (epoch - cinode->epoch > 1))
4073                                 *purge_cache = true;
4074                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
4075                                  (epoch - cinode->epoch > 1))
4076                                 *purge_cache = true;
4077                         else if (cinode->oplock == 0 &&
4078                                  (epoch - cinode->epoch > 0))
4079                                 *purge_cache = true;
4080                 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
4081                         if (cinode->oplock == CIFS_CACHE_RH_FLG &&
4082                             (epoch - cinode->epoch > 0))
4083                                 *purge_cache = true;
4084                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
4085                                  (epoch - cinode->epoch > 1))
4086                                 *purge_cache = true;
4087                 }
4088                 cinode->epoch = epoch;
4089         }
4090 }
4091
4092 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
4093 static bool
4094 smb2_is_read_op(__u32 oplock)
4095 {
4096         return oplock == SMB2_OPLOCK_LEVEL_II;
4097 }
4098 #endif /* CIFS_ALLOW_INSECURE_LEGACY */
4099
4100 static bool
4101 smb21_is_read_op(__u32 oplock)
4102 {
4103         return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
4104                !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
4105 }
4106
4107 static __le32
4108 map_oplock_to_lease(u8 oplock)
4109 {
4110         if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
4111                 return SMB2_LEASE_WRITE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE;
4112         else if (oplock == SMB2_OPLOCK_LEVEL_II)
4113                 return SMB2_LEASE_READ_CACHING_LE;
4114         else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
4115                 return SMB2_LEASE_HANDLE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE |
4116                        SMB2_LEASE_WRITE_CACHING_LE;
4117         return 0;
4118 }
4119
4120 static char *
4121 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
4122 {
4123         struct create_lease *buf;
4124
4125         buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
4126         if (!buf)
4127                 return NULL;
4128
4129         memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
4130         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
4131
4132         buf->ccontext.DataOffset = cpu_to_le16(offsetof
4133                                         (struct create_lease, lcontext));
4134         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
4135         buf->ccontext.NameOffset = cpu_to_le16(offsetof
4136                                 (struct create_lease, Name));
4137         buf->ccontext.NameLength = cpu_to_le16(4);
4138         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
4139         buf->Name[0] = 'R';
4140         buf->Name[1] = 'q';
4141         buf->Name[2] = 'L';
4142         buf->Name[3] = 's';
4143         return (char *)buf;
4144 }
4145
4146 static char *
4147 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
4148 {
4149         struct create_lease_v2 *buf;
4150
4151         buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
4152         if (!buf)
4153                 return NULL;
4154
4155         memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
4156         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
4157
4158         buf->ccontext.DataOffset = cpu_to_le16(offsetof
4159                                         (struct create_lease_v2, lcontext));
4160         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
4161         buf->ccontext.NameOffset = cpu_to_le16(offsetof
4162                                 (struct create_lease_v2, Name));
4163         buf->ccontext.NameLength = cpu_to_le16(4);
4164         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
4165         buf->Name[0] = 'R';
4166         buf->Name[1] = 'q';
4167         buf->Name[2] = 'L';
4168         buf->Name[3] = 's';
4169         return (char *)buf;
4170 }
4171
4172 static __u8
4173 smb2_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
4174 {
4175         struct create_lease *lc = (struct create_lease *)buf;
4176
4177         *epoch = 0; /* not used */
4178         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE)
4179                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
4180         return le32_to_cpu(lc->lcontext.LeaseState);
4181 }
4182
4183 static __u8
4184 smb3_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
4185 {
4186         struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
4187
4188         *epoch = le16_to_cpu(lc->lcontext.Epoch);
4189         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE)
4190                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
4191         if (lease_key)
4192                 memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE);
4193         return le32_to_cpu(lc->lcontext.LeaseState);
4194 }
4195
4196 static unsigned int
4197 smb2_wp_retry_size(struct inode *inode)
4198 {
4199         return min_t(unsigned int, CIFS_SB(inode->i_sb)->ctx->wsize,
4200                      SMB2_MAX_BUFFER_SIZE);
4201 }
4202
4203 static bool
4204 smb2_dir_needs_close(struct cifsFileInfo *cfile)
4205 {
4206         return !cfile->invalidHandle;
4207 }
4208
4209 static void
4210 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len,
4211                    struct smb_rqst *old_rq, __le16 cipher_type)
4212 {
4213         struct smb2_hdr *shdr =
4214                         (struct smb2_hdr *)old_rq->rq_iov[0].iov_base;
4215
4216         memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
4217         tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
4218         tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
4219         tr_hdr->Flags = cpu_to_le16(0x01);
4220         if ((cipher_type == SMB2_ENCRYPTION_AES128_GCM) ||
4221             (cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4222                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
4223         else
4224                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
4225         memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8);
4226 }
4227
4228 static void *smb2_aead_req_alloc(struct crypto_aead *tfm, const struct smb_rqst *rqst,
4229                                  int num_rqst, const u8 *sig, u8 **iv,
4230                                  struct aead_request **req, struct scatterlist **sgl,
4231                                  unsigned int *num_sgs)
4232 {
4233         unsigned int req_size = sizeof(**req) + crypto_aead_reqsize(tfm);
4234         unsigned int iv_size = crypto_aead_ivsize(tfm);
4235         unsigned int len;
4236         u8 *p;
4237
4238         *num_sgs = cifs_get_num_sgs(rqst, num_rqst, sig);
4239
4240         len = iv_size;
4241         len += crypto_aead_alignmask(tfm) & ~(crypto_tfm_ctx_alignment() - 1);
4242         len = ALIGN(len, crypto_tfm_ctx_alignment());
4243         len += req_size;
4244         len = ALIGN(len, __alignof__(struct scatterlist));
4245         len += *num_sgs * sizeof(**sgl);
4246
4247         p = kmalloc(len, GFP_ATOMIC);
4248         if (!p)
4249                 return NULL;
4250
4251         *iv = (u8 *)PTR_ALIGN(p, crypto_aead_alignmask(tfm) + 1);
4252         *req = (struct aead_request *)PTR_ALIGN(*iv + iv_size,
4253                                                 crypto_tfm_ctx_alignment());
4254         *sgl = (struct scatterlist *)PTR_ALIGN((u8 *)*req + req_size,
4255                                                __alignof__(struct scatterlist));
4256         return p;
4257 }
4258
4259 static void *smb2_get_aead_req(struct crypto_aead *tfm, const struct smb_rqst *rqst,
4260                                int num_rqst, const u8 *sig, u8 **iv,
4261                                struct aead_request **req, struct scatterlist **sgl)
4262 {
4263         unsigned int off, len, skip;
4264         struct scatterlist *sg;
4265         unsigned int num_sgs;
4266         unsigned long addr;
4267         int i, j;
4268         void *p;
4269
4270         p = smb2_aead_req_alloc(tfm, rqst, num_rqst, sig, iv, req, sgl, &num_sgs);
4271         if (!p)
4272                 return NULL;
4273
4274         sg_init_table(*sgl, num_sgs);
4275         sg = *sgl;
4276
4277         /* Assumes the first rqst has a transform header as the first iov.
4278          * I.e.
4279          * rqst[0].rq_iov[0]  is transform header
4280          * rqst[0].rq_iov[1+] data to be encrypted/decrypted
4281          * rqst[1+].rq_iov[0+] data to be encrypted/decrypted
4282          */
4283         for (i = 0; i < num_rqst; i++) {
4284                 /*
4285                  * The first rqst has a transform header where the
4286                  * first 20 bytes are not part of the encrypted blob.
4287                  */
4288                 for (j = 0; j < rqst[i].rq_nvec; j++) {
4289                         struct kvec *iov = &rqst[i].rq_iov[j];
4290
4291                         skip = (i == 0) && (j == 0) ? 20 : 0;
4292                         addr = (unsigned long)iov->iov_base + skip;
4293                         len = iov->iov_len - skip;
4294                         sg = cifs_sg_set_buf(sg, (void *)addr, len);
4295                 }
4296                 for (j = 0; j < rqst[i].rq_npages; j++) {
4297                         rqst_page_get_length(&rqst[i], j, &len, &off);
4298                         sg_set_page(sg++, rqst[i].rq_pages[j], len, off);
4299                 }
4300         }
4301         cifs_sg_set_buf(sg, sig, SMB2_SIGNATURE_SIZE);
4302
4303         return p;
4304 }
4305
4306 static int
4307 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)
4308 {
4309         struct TCP_Server_Info *pserver;
4310         struct cifs_ses *ses;
4311         u8 *ses_enc_key;
4312
4313         /* If server is a channel, select the primary channel */
4314         pserver = CIFS_SERVER_IS_CHAN(server) ? server->primary_server : server;
4315
4316         spin_lock(&cifs_tcp_ses_lock);
4317         list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) {
4318                 if (ses->Suid == ses_id) {
4319                         spin_lock(&ses->ses_lock);
4320                         ses_enc_key = enc ? ses->smb3encryptionkey :
4321                                 ses->smb3decryptionkey;
4322                         memcpy(key, ses_enc_key, SMB3_ENC_DEC_KEY_SIZE);
4323                         spin_unlock(&ses->ses_lock);
4324                         spin_unlock(&cifs_tcp_ses_lock);
4325                         return 0;
4326                 }
4327         }
4328         spin_unlock(&cifs_tcp_ses_lock);
4329
4330         return -EAGAIN;
4331 }
4332 /*
4333  * Encrypt or decrypt @rqst message. @rqst[0] has the following format:
4334  * iov[0]   - transform header (associate data),
4335  * iov[1-N] - SMB2 header and pages - data to encrypt.
4336  * On success return encrypted data in iov[1-N] and pages, leave iov[0]
4337  * untouched.
4338  */
4339 static int
4340 crypt_message(struct TCP_Server_Info *server, int num_rqst,
4341               struct smb_rqst *rqst, int enc)
4342 {
4343         struct smb2_transform_hdr *tr_hdr =
4344                 (struct smb2_transform_hdr *)rqst[0].rq_iov[0].iov_base;
4345         unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20;
4346         int rc = 0;
4347         struct scatterlist *sg;
4348         u8 sign[SMB2_SIGNATURE_SIZE] = {};
4349         u8 key[SMB3_ENC_DEC_KEY_SIZE];
4350         struct aead_request *req;
4351         u8 *iv;
4352         DECLARE_CRYPTO_WAIT(wait);
4353         struct crypto_aead *tfm;
4354         unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
4355         void *creq;
4356
4357         rc = smb2_get_enc_key(server, le64_to_cpu(tr_hdr->SessionId), enc, key);
4358         if (rc) {
4359                 cifs_server_dbg(VFS, "%s: Could not get %scryption key\n", __func__,
4360                          enc ? "en" : "de");
4361                 return rc;
4362         }
4363
4364         rc = smb3_crypto_aead_allocate(server);
4365         if (rc) {
4366                 cifs_server_dbg(VFS, "%s: crypto alloc failed\n", __func__);
4367                 return rc;
4368         }
4369
4370         tfm = enc ? server->secmech.enc : server->secmech.dec;
4371
4372         if ((server->cipher_type == SMB2_ENCRYPTION_AES256_CCM) ||
4373                 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4374                 rc = crypto_aead_setkey(tfm, key, SMB3_GCM256_CRYPTKEY_SIZE);
4375         else
4376                 rc = crypto_aead_setkey(tfm, key, SMB3_GCM128_CRYPTKEY_SIZE);
4377
4378         if (rc) {
4379                 cifs_server_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc);
4380                 return rc;
4381         }
4382
4383         rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE);
4384         if (rc) {
4385                 cifs_server_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc);
4386                 return rc;
4387         }
4388
4389         creq = smb2_get_aead_req(tfm, rqst, num_rqst, sign, &iv, &req, &sg);
4390         if (unlikely(!creq))
4391                 return -ENOMEM;
4392
4393         if (!enc) {
4394                 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE);
4395                 crypt_len += SMB2_SIGNATURE_SIZE;
4396         }
4397
4398         if ((server->cipher_type == SMB2_ENCRYPTION_AES128_GCM) ||
4399             (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4400                 memcpy(iv, (char *)tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
4401         else {
4402                 iv[0] = 3;
4403                 memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
4404         }
4405
4406         aead_request_set_tfm(req, tfm);
4407         aead_request_set_crypt(req, sg, sg, crypt_len, iv);
4408         aead_request_set_ad(req, assoc_data_len);
4409
4410         aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
4411                                   crypto_req_done, &wait);
4412
4413         rc = crypto_wait_req(enc ? crypto_aead_encrypt(req)
4414                                 : crypto_aead_decrypt(req), &wait);
4415
4416         if (!rc && enc)
4417                 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE);
4418
4419         kfree_sensitive(creq);
4420         return rc;
4421 }
4422
4423 void
4424 smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst)
4425 {
4426         int i, j;
4427
4428         for (i = 0; i < num_rqst; i++) {
4429                 if (rqst[i].rq_pages) {
4430                         for (j = rqst[i].rq_npages - 1; j >= 0; j--)
4431                                 put_page(rqst[i].rq_pages[j]);
4432                         kfree(rqst[i].rq_pages);
4433                 }
4434         }
4435 }
4436
4437 /*
4438  * This function will initialize new_rq and encrypt the content.
4439  * The first entry, new_rq[0], only contains a single iov which contains
4440  * a smb2_transform_hdr and is pre-allocated by the caller.
4441  * This function then populates new_rq[1+] with the content from olq_rq[0+].
4442  *
4443  * The end result is an array of smb_rqst structures where the first structure
4444  * only contains a single iov for the transform header which we then can pass
4445  * to crypt_message().
4446  *
4447  * new_rq[0].rq_iov[0] :  smb2_transform_hdr pre-allocated by the caller
4448  * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests
4449  */
4450 static int
4451 smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst,
4452                        struct smb_rqst *new_rq, struct smb_rqst *old_rq)
4453 {
4454         struct page **pages;
4455         struct smb2_transform_hdr *tr_hdr = new_rq[0].rq_iov[0].iov_base;
4456         unsigned int npages;
4457         unsigned int orig_len = 0;
4458         int i, j;
4459         int rc = -ENOMEM;
4460
4461         for (i = 1; i < num_rqst; i++) {
4462                 struct smb_rqst *old = &old_rq[i - 1];
4463                 struct smb_rqst *new = &new_rq[i];
4464
4465                 orig_len += smb_rqst_len(server, old);
4466                 new->rq_iov = old->rq_iov;
4467                 new->rq_nvec = old->rq_nvec;
4468
4469                 npages = old->rq_npages;
4470                 if (!npages)
4471                         continue;
4472
4473                 pages = kmalloc_array(npages, sizeof(struct page *),
4474                                       GFP_KERNEL);
4475                 if (!pages)
4476                         goto err_free;
4477
4478                 new->rq_pages = pages;
4479                 new->rq_npages = npages;
4480                 new->rq_offset = old->rq_offset;
4481                 new->rq_pagesz = old->rq_pagesz;
4482                 new->rq_tailsz = old->rq_tailsz;
4483
4484                 for (j = 0; j < npages; j++) {
4485                         pages[j] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
4486                         if (!pages[j])
4487                                 goto err_free;
4488                 }
4489
4490                 /* copy pages form the old */
4491                 for (j = 0; j < npages; j++) {
4492                         unsigned int offset, len;
4493
4494                         rqst_page_get_length(new, j, &len, &offset);
4495
4496                         memcpy_page(new->rq_pages[j], offset,
4497                                     old->rq_pages[j], offset, len);
4498                 }
4499         }
4500
4501         /* fill the 1st iov with a transform header */
4502         fill_transform_hdr(tr_hdr, orig_len, old_rq, server->cipher_type);
4503
4504         rc = crypt_message(server, num_rqst, new_rq, 1);
4505         cifs_dbg(FYI, "Encrypt message returned %d\n", rc);
4506         if (rc)
4507                 goto err_free;
4508
4509         return rc;
4510
4511 err_free:
4512         smb3_free_compound_rqst(num_rqst - 1, &new_rq[1]);
4513         return rc;
4514 }
4515
4516 static int
4517 smb3_is_transform_hdr(void *buf)
4518 {
4519         struct smb2_transform_hdr *trhdr = buf;
4520
4521         return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
4522 }
4523
4524 static int
4525 decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
4526                  unsigned int buf_data_size, struct page **pages,
4527                  unsigned int npages, unsigned int page_data_size,
4528                  bool is_offloaded)
4529 {
4530         struct kvec iov[2];
4531         struct smb_rqst rqst = {NULL};
4532         int rc;
4533
4534         iov[0].iov_base = buf;
4535         iov[0].iov_len = sizeof(struct smb2_transform_hdr);
4536         iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr);
4537         iov[1].iov_len = buf_data_size;
4538
4539         rqst.rq_iov = iov;
4540         rqst.rq_nvec = 2;
4541         rqst.rq_pages = pages;
4542         rqst.rq_npages = npages;
4543         rqst.rq_pagesz = PAGE_SIZE;
4544         rqst.rq_tailsz = (page_data_size % PAGE_SIZE) ? : PAGE_SIZE;
4545
4546         rc = crypt_message(server, 1, &rqst, 0);
4547         cifs_dbg(FYI, "Decrypt message returned %d\n", rc);
4548
4549         if (rc)
4550                 return rc;
4551
4552         memmove(buf, iov[1].iov_base, buf_data_size);
4553
4554         if (!is_offloaded)
4555                 server->total_read = buf_data_size + page_data_size;
4556
4557         return rc;
4558 }
4559
4560 static int
4561 read_data_into_pages(struct TCP_Server_Info *server, struct page **pages,
4562                      unsigned int npages, unsigned int len)
4563 {
4564         int i;
4565         int length;
4566
4567         for (i = 0; i < npages; i++) {
4568                 struct page *page = pages[i];
4569                 size_t n;
4570
4571                 n = len;
4572                 if (len >= PAGE_SIZE) {
4573                         /* enough data to fill the page */
4574                         n = PAGE_SIZE;
4575                         len -= n;
4576                 } else {
4577                         zero_user(page, len, PAGE_SIZE - len);
4578                         len = 0;
4579                 }
4580                 length = cifs_read_page_from_socket(server, page, 0, n);
4581                 if (length < 0)
4582                         return length;
4583                 server->total_read += length;
4584         }
4585
4586         return 0;
4587 }
4588
4589 static int
4590 init_read_bvec(struct page **pages, unsigned int npages, unsigned int data_size,
4591                unsigned int cur_off, struct bio_vec **page_vec)
4592 {
4593         struct bio_vec *bvec;
4594         int i;
4595
4596         bvec = kcalloc(npages, sizeof(struct bio_vec), GFP_KERNEL);
4597         if (!bvec)
4598                 return -ENOMEM;
4599
4600         for (i = 0; i < npages; i++) {
4601                 bvec[i].bv_page = pages[i];
4602                 bvec[i].bv_offset = (i == 0) ? cur_off : 0;
4603                 bvec[i].bv_len = min_t(unsigned int, PAGE_SIZE, data_size);
4604                 data_size -= bvec[i].bv_len;
4605         }
4606
4607         if (data_size != 0) {
4608                 cifs_dbg(VFS, "%s: something went wrong\n", __func__);
4609                 kfree(bvec);
4610                 return -EIO;
4611         }
4612
4613         *page_vec = bvec;
4614         return 0;
4615 }
4616
4617 static int
4618 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
4619                  char *buf, unsigned int buf_len, struct page **pages,
4620                  unsigned int npages, unsigned int page_data_size,
4621                  bool is_offloaded)
4622 {
4623         unsigned int data_offset;
4624         unsigned int data_len;
4625         unsigned int cur_off;
4626         unsigned int cur_page_idx;
4627         unsigned int pad_len;
4628         struct cifs_readdata *rdata = mid->callback_data;
4629         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
4630         struct bio_vec *bvec = NULL;
4631         struct iov_iter iter;
4632         struct kvec iov;
4633         int length;
4634         bool use_rdma_mr = false;
4635
4636         if (shdr->Command != SMB2_READ) {
4637                 cifs_server_dbg(VFS, "only big read responses are supported\n");
4638                 return -ENOTSUPP;
4639         }
4640
4641         if (server->ops->is_session_expired &&
4642             server->ops->is_session_expired(buf)) {
4643                 if (!is_offloaded)
4644                         cifs_reconnect(server, true);
4645                 return -1;
4646         }
4647
4648         if (server->ops->is_status_pending &&
4649                         server->ops->is_status_pending(buf, server))
4650                 return -1;
4651
4652         /* set up first two iov to get credits */
4653         rdata->iov[0].iov_base = buf;
4654         rdata->iov[0].iov_len = 0;
4655         rdata->iov[1].iov_base = buf;
4656         rdata->iov[1].iov_len =
4657                 min_t(unsigned int, buf_len, server->vals->read_rsp_size);
4658         cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
4659                  rdata->iov[0].iov_base, rdata->iov[0].iov_len);
4660         cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n",
4661                  rdata->iov[1].iov_base, rdata->iov[1].iov_len);
4662
4663         rdata->result = server->ops->map_error(buf, true);
4664         if (rdata->result != 0) {
4665                 cifs_dbg(FYI, "%s: server returned error %d\n",
4666                          __func__, rdata->result);
4667                 /* normal error on read response */
4668                 if (is_offloaded)
4669                         mid->mid_state = MID_RESPONSE_RECEIVED;
4670                 else
4671                         dequeue_mid(mid, false);
4672                 return 0;
4673         }
4674
4675         data_offset = server->ops->read_data_offset(buf);
4676 #ifdef CONFIG_CIFS_SMB_DIRECT
4677         use_rdma_mr = rdata->mr;
4678 #endif
4679         data_len = server->ops->read_data_length(buf, use_rdma_mr);
4680
4681         if (data_offset < server->vals->read_rsp_size) {
4682                 /*
4683                  * win2k8 sometimes sends an offset of 0 when the read
4684                  * is beyond the EOF. Treat it as if the data starts just after
4685                  * the header.
4686                  */
4687                 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n",
4688                          __func__, data_offset);
4689                 data_offset = server->vals->read_rsp_size;
4690         } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) {
4691                 /* data_offset is beyond the end of smallbuf */
4692                 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n",
4693                          __func__, data_offset);
4694                 rdata->result = -EIO;
4695                 if (is_offloaded)
4696                         mid->mid_state = MID_RESPONSE_MALFORMED;
4697                 else
4698                         dequeue_mid(mid, rdata->result);
4699                 return 0;
4700         }
4701
4702         pad_len = data_offset - server->vals->read_rsp_size;
4703
4704         if (buf_len <= data_offset) {
4705                 /* read response payload is in pages */
4706                 cur_page_idx = pad_len / PAGE_SIZE;
4707                 cur_off = pad_len % PAGE_SIZE;
4708
4709                 if (cur_page_idx != 0) {
4710                         /* data offset is beyond the 1st page of response */
4711                         cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n",
4712                                  __func__, data_offset);
4713                         rdata->result = -EIO;
4714                         if (is_offloaded)
4715                                 mid->mid_state = MID_RESPONSE_MALFORMED;
4716                         else
4717                                 dequeue_mid(mid, rdata->result);
4718                         return 0;
4719                 }
4720
4721                 if (data_len > page_data_size - pad_len) {
4722                         /* data_len is corrupt -- discard frame */
4723                         rdata->result = -EIO;
4724                         if (is_offloaded)
4725                                 mid->mid_state = MID_RESPONSE_MALFORMED;
4726                         else
4727                                 dequeue_mid(mid, rdata->result);
4728                         return 0;
4729                 }
4730
4731                 rdata->result = init_read_bvec(pages, npages, page_data_size,
4732                                                cur_off, &bvec);
4733                 if (rdata->result != 0) {
4734                         if (is_offloaded)
4735                                 mid->mid_state = MID_RESPONSE_MALFORMED;
4736                         else
4737                                 dequeue_mid(mid, rdata->result);
4738                         return 0;
4739                 }
4740
4741                 iov_iter_bvec(&iter, ITER_SOURCE, bvec, npages, data_len);
4742         } else if (buf_len >= data_offset + data_len) {
4743                 /* read response payload is in buf */
4744                 WARN_ONCE(npages > 0, "read data can be either in buf or in pages");
4745                 iov.iov_base = buf + data_offset;
4746                 iov.iov_len = data_len;
4747                 iov_iter_kvec(&iter, ITER_SOURCE, &iov, 1, data_len);
4748         } else {
4749                 /* read response payload cannot be in both buf and pages */
4750                 WARN_ONCE(1, "buf can not contain only a part of read data");
4751                 rdata->result = -EIO;
4752                 if (is_offloaded)
4753                         mid->mid_state = MID_RESPONSE_MALFORMED;
4754                 else
4755                         dequeue_mid(mid, rdata->result);
4756                 return 0;
4757         }
4758
4759         length = rdata->copy_into_pages(server, rdata, &iter);
4760
4761         kfree(bvec);
4762
4763         if (length < 0)
4764                 return length;
4765
4766         if (is_offloaded)
4767                 mid->mid_state = MID_RESPONSE_RECEIVED;
4768         else
4769                 dequeue_mid(mid, false);
4770         return length;
4771 }
4772
4773 struct smb2_decrypt_work {
4774         struct work_struct decrypt;
4775         struct TCP_Server_Info *server;
4776         struct page **ppages;
4777         char *buf;
4778         unsigned int npages;
4779         unsigned int len;
4780 };
4781
4782
4783 static void smb2_decrypt_offload(struct work_struct *work)
4784 {
4785         struct smb2_decrypt_work *dw = container_of(work,
4786                                 struct smb2_decrypt_work, decrypt);
4787         int i, rc;
4788         struct mid_q_entry *mid;
4789
4790         rc = decrypt_raw_data(dw->server, dw->buf, dw->server->vals->read_rsp_size,
4791                               dw->ppages, dw->npages, dw->len, true);
4792         if (rc) {
4793                 cifs_dbg(VFS, "error decrypting rc=%d\n", rc);
4794                 goto free_pages;
4795         }
4796
4797         dw->server->lstrp = jiffies;
4798         mid = smb2_find_dequeue_mid(dw->server, dw->buf);
4799         if (mid == NULL)
4800                 cifs_dbg(FYI, "mid not found\n");
4801         else {
4802                 mid->decrypted = true;
4803                 rc = handle_read_data(dw->server, mid, dw->buf,
4804                                       dw->server->vals->read_rsp_size,
4805                                       dw->ppages, dw->npages, dw->len,
4806                                       true);
4807                 if (rc >= 0) {
4808 #ifdef CONFIG_CIFS_STATS2
4809                         mid->when_received = jiffies;
4810 #endif
4811                         if (dw->server->ops->is_network_name_deleted)
4812                                 dw->server->ops->is_network_name_deleted(dw->buf,
4813                                                                          dw->server);
4814
4815                         mid->callback(mid);
4816                 } else {
4817                         spin_lock(&dw->server->srv_lock);
4818                         if (dw->server->tcpStatus == CifsNeedReconnect) {
4819                                 spin_lock(&dw->server->mid_lock);
4820                                 mid->mid_state = MID_RETRY_NEEDED;
4821                                 spin_unlock(&dw->server->mid_lock);
4822                                 spin_unlock(&dw->server->srv_lock);
4823                                 mid->callback(mid);
4824                         } else {
4825                                 spin_lock(&dw->server->mid_lock);
4826                                 mid->mid_state = MID_REQUEST_SUBMITTED;
4827                                 mid->mid_flags &= ~(MID_DELETED);
4828                                 list_add_tail(&mid->qhead,
4829                                         &dw->server->pending_mid_q);
4830                                 spin_unlock(&dw->server->mid_lock);
4831                                 spin_unlock(&dw->server->srv_lock);
4832                         }
4833                 }
4834                 release_mid(mid);
4835         }
4836
4837 free_pages:
4838         for (i = dw->npages-1; i >= 0; i--)
4839                 put_page(dw->ppages[i]);
4840
4841         kfree(dw->ppages);
4842         cifs_small_buf_release(dw->buf);
4843         kfree(dw);
4844 }
4845
4846
4847 static int
4848 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid,
4849                        int *num_mids)
4850 {
4851         char *buf = server->smallbuf;
4852         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
4853         unsigned int npages;
4854         struct page **pages;
4855         unsigned int len;
4856         unsigned int buflen = server->pdu_size;
4857         int rc;
4858         int i = 0;
4859         struct smb2_decrypt_work *dw;
4860
4861         *num_mids = 1;
4862         len = min_t(unsigned int, buflen, server->vals->read_rsp_size +
4863                 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1;
4864
4865         rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len);
4866         if (rc < 0)
4867                 return rc;
4868         server->total_read += rc;
4869
4870         len = le32_to_cpu(tr_hdr->OriginalMessageSize) -
4871                 server->vals->read_rsp_size;
4872         npages = DIV_ROUND_UP(len, PAGE_SIZE);
4873
4874         pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
4875         if (!pages) {
4876                 rc = -ENOMEM;
4877                 goto discard_data;
4878         }
4879
4880         for (; i < npages; i++) {
4881                 pages[i] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
4882                 if (!pages[i]) {
4883                         rc = -ENOMEM;
4884                         goto discard_data;
4885                 }
4886         }
4887
4888         /* read read data into pages */
4889         rc = read_data_into_pages(server, pages, npages, len);
4890         if (rc)
4891                 goto free_pages;
4892
4893         rc = cifs_discard_remaining_data(server);
4894         if (rc)
4895                 goto free_pages;
4896
4897         /*
4898          * For large reads, offload to different thread for better performance,
4899          * use more cores decrypting which can be expensive
4900          */
4901
4902         if ((server->min_offload) && (server->in_flight > 1) &&
4903             (server->pdu_size >= server->min_offload)) {
4904                 dw = kmalloc(sizeof(struct smb2_decrypt_work), GFP_KERNEL);
4905                 if (dw == NULL)
4906                         goto non_offloaded_decrypt;
4907
4908                 dw->buf = server->smallbuf;
4909                 server->smallbuf = (char *)cifs_small_buf_get();
4910
4911                 INIT_WORK(&dw->decrypt, smb2_decrypt_offload);
4912
4913                 dw->npages = npages;
4914                 dw->server = server;
4915                 dw->ppages = pages;
4916                 dw->len = len;
4917                 queue_work(decrypt_wq, &dw->decrypt);
4918                 *num_mids = 0; /* worker thread takes care of finding mid */
4919                 return -1;
4920         }
4921
4922 non_offloaded_decrypt:
4923         rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size,
4924                               pages, npages, len, false);
4925         if (rc)
4926                 goto free_pages;
4927
4928         *mid = smb2_find_mid(server, buf);
4929         if (*mid == NULL)
4930                 cifs_dbg(FYI, "mid not found\n");
4931         else {
4932                 cifs_dbg(FYI, "mid found\n");
4933                 (*mid)->decrypted = true;
4934                 rc = handle_read_data(server, *mid, buf,
4935                                       server->vals->read_rsp_size,
4936                                       pages, npages, len, false);
4937                 if (rc >= 0) {
4938                         if (server->ops->is_network_name_deleted) {
4939                                 server->ops->is_network_name_deleted(buf,
4940                                                                 server);
4941                         }
4942                 }
4943         }
4944
4945 free_pages:
4946         for (i = i - 1; i >= 0; i--)
4947                 put_page(pages[i]);
4948         kfree(pages);
4949         return rc;
4950 discard_data:
4951         cifs_discard_remaining_data(server);
4952         goto free_pages;
4953 }
4954
4955 static int
4956 receive_encrypted_standard(struct TCP_Server_Info *server,
4957                            struct mid_q_entry **mids, char **bufs,
4958                            int *num_mids)
4959 {
4960         int ret, length;
4961         char *buf = server->smallbuf;
4962         struct smb2_hdr *shdr;
4963         unsigned int pdu_length = server->pdu_size;
4964         unsigned int buf_size;
4965         struct mid_q_entry *mid_entry;
4966         int next_is_large;
4967         char *next_buffer = NULL;
4968
4969         *num_mids = 0;
4970
4971         /* switch to large buffer if too big for a small one */
4972         if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) {
4973                 server->large_buf = true;
4974                 memcpy(server->bigbuf, buf, server->total_read);
4975                 buf = server->bigbuf;
4976         }
4977
4978         /* now read the rest */
4979         length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
4980                                 pdu_length - HEADER_SIZE(server) + 1);
4981         if (length < 0)
4982                 return length;
4983         server->total_read += length;
4984
4985         buf_size = pdu_length - sizeof(struct smb2_transform_hdr);
4986         length = decrypt_raw_data(server, buf, buf_size, NULL, 0, 0, false);
4987         if (length)
4988                 return length;
4989
4990         next_is_large = server->large_buf;
4991 one_more:
4992         shdr = (struct smb2_hdr *)buf;
4993         if (shdr->NextCommand) {
4994                 if (next_is_large)
4995                         next_buffer = (char *)cifs_buf_get();
4996                 else
4997                         next_buffer = (char *)cifs_small_buf_get();
4998                 memcpy(next_buffer,
4999                        buf + le32_to_cpu(shdr->NextCommand),
5000                        pdu_length - le32_to_cpu(shdr->NextCommand));
5001         }
5002
5003         mid_entry = smb2_find_mid(server, buf);
5004         if (mid_entry == NULL)
5005                 cifs_dbg(FYI, "mid not found\n");
5006         else {
5007                 cifs_dbg(FYI, "mid found\n");
5008                 mid_entry->decrypted = true;
5009                 mid_entry->resp_buf_size = server->pdu_size;
5010         }
5011
5012         if (*num_mids >= MAX_COMPOUND) {
5013                 cifs_server_dbg(VFS, "too many PDUs in compound\n");
5014                 return -1;
5015         }
5016         bufs[*num_mids] = buf;
5017         mids[(*num_mids)++] = mid_entry;
5018
5019         if (mid_entry && mid_entry->handle)
5020                 ret = mid_entry->handle(server, mid_entry);
5021         else
5022                 ret = cifs_handle_standard(server, mid_entry);
5023
5024         if (ret == 0 && shdr->NextCommand) {
5025                 pdu_length -= le32_to_cpu(shdr->NextCommand);
5026                 server->large_buf = next_is_large;
5027                 if (next_is_large)
5028                         server->bigbuf = buf = next_buffer;
5029                 else
5030                         server->smallbuf = buf = next_buffer;
5031                 goto one_more;
5032         } else if (ret != 0) {
5033                 /*
5034                  * ret != 0 here means that we didn't get to handle_mid() thus
5035                  * server->smallbuf and server->bigbuf are still valid. We need
5036                  * to free next_buffer because it is not going to be used
5037                  * anywhere.
5038                  */
5039                 if (next_is_large)
5040                         free_rsp_buf(CIFS_LARGE_BUFFER, next_buffer);
5041                 else
5042                         free_rsp_buf(CIFS_SMALL_BUFFER, next_buffer);
5043         }
5044
5045         return ret;
5046 }
5047
5048 static int
5049 smb3_receive_transform(struct TCP_Server_Info *server,
5050                        struct mid_q_entry **mids, char **bufs, int *num_mids)
5051 {
5052         char *buf = server->smallbuf;
5053         unsigned int pdu_length = server->pdu_size;
5054         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
5055         unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
5056
5057         if (pdu_length < sizeof(struct smb2_transform_hdr) +
5058                                                 sizeof(struct smb2_hdr)) {
5059                 cifs_server_dbg(VFS, "Transform message is too small (%u)\n",
5060                          pdu_length);
5061                 cifs_reconnect(server, true);
5062                 return -ECONNABORTED;
5063         }
5064
5065         if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) {
5066                 cifs_server_dbg(VFS, "Transform message is broken\n");
5067                 cifs_reconnect(server, true);
5068                 return -ECONNABORTED;
5069         }
5070
5071         /* TODO: add support for compounds containing READ. */
5072         if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server)) {
5073                 return receive_encrypted_read(server, &mids[0], num_mids);
5074         }
5075
5076         return receive_encrypted_standard(server, mids, bufs, num_mids);
5077 }
5078
5079 int
5080 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid)
5081 {
5082         char *buf = server->large_buf ? server->bigbuf : server->smallbuf;
5083
5084         return handle_read_data(server, mid, buf, server->pdu_size,
5085                                 NULL, 0, 0, false);
5086 }
5087
5088 static int
5089 smb2_next_header(char *buf)
5090 {
5091         struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
5092         struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf;
5093
5094         if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM)
5095                 return sizeof(struct smb2_transform_hdr) +
5096                   le32_to_cpu(t_hdr->OriginalMessageSize);
5097
5098         return le32_to_cpu(hdr->NextCommand);
5099 }
5100
5101 static int
5102 smb2_make_node(unsigned int xid, struct inode *inode,
5103                struct dentry *dentry, struct cifs_tcon *tcon,
5104                const char *full_path, umode_t mode, dev_t dev)
5105 {
5106         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
5107         int rc = -EPERM;
5108         struct cifs_open_info_data buf = {};
5109         struct cifs_io_parms io_parms = {0};
5110         __u32 oplock = 0;
5111         struct cifs_fid fid;
5112         struct cifs_open_parms oparms;
5113         unsigned int bytes_written;
5114         struct win_dev *pdev;
5115         struct kvec iov[2];
5116
5117         /*
5118          * Check if mounted with mount parm 'sfu' mount parm.
5119          * SFU emulation should work with all servers, but only
5120          * supports block and char device (no socket & fifo),
5121          * and was used by default in earlier versions of Windows
5122          */
5123         if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL))
5124                 return rc;
5125
5126         /*
5127          * TODO: Add ability to create instead via reparse point. Windows (e.g.
5128          * their current NFS server) uses this approach to expose special files
5129          * over SMB2/SMB3 and Samba will do this with SMB3.1.1 POSIX Extensions
5130          */
5131
5132         if (!S_ISCHR(mode) && !S_ISBLK(mode))
5133                 return rc;
5134
5135         cifs_dbg(FYI, "sfu compat create special file\n");
5136
5137         oparms.tcon = tcon;
5138         oparms.cifs_sb = cifs_sb;
5139         oparms.desired_access = GENERIC_WRITE;
5140         oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR |
5141                                                     CREATE_OPTION_SPECIAL);
5142         oparms.disposition = FILE_CREATE;
5143         oparms.path = full_path;
5144         oparms.fid = &fid;
5145         oparms.reconnect = false;
5146
5147         if (tcon->ses->server->oplocks)
5148                 oplock = REQ_OPLOCK;
5149         else
5150                 oplock = 0;
5151         rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, &buf);
5152         if (rc)
5153                 return rc;
5154
5155         /*
5156          * BB Do not bother to decode buf since no local inode yet to put
5157          * timestamps in, but we can reuse it safely.
5158          */
5159
5160         pdev = (struct win_dev *)&buf.fi;
5161         io_parms.pid = current->tgid;
5162         io_parms.tcon = tcon;
5163         io_parms.offset = 0;
5164         io_parms.length = sizeof(struct win_dev);
5165         iov[1].iov_base = &buf.fi;
5166         iov[1].iov_len = sizeof(struct win_dev);
5167         if (S_ISCHR(mode)) {
5168                 memcpy(pdev->type, "IntxCHR", 8);
5169                 pdev->major = cpu_to_le64(MAJOR(dev));
5170                 pdev->minor = cpu_to_le64(MINOR(dev));
5171                 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
5172                                                         &bytes_written, iov, 1);
5173         } else if (S_ISBLK(mode)) {
5174                 memcpy(pdev->type, "IntxBLK", 8);
5175                 pdev->major = cpu_to_le64(MAJOR(dev));
5176                 pdev->minor = cpu_to_le64(MINOR(dev));
5177                 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
5178                                                         &bytes_written, iov, 1);
5179         }
5180         tcon->ses->server->ops->close(xid, tcon, &fid);
5181         d_drop(dentry);
5182
5183         /* FIXME: add code here to set EAs */
5184
5185         cifs_free_open_info(&buf);
5186         return rc;
5187 }
5188
5189 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
5190 struct smb_version_operations smb20_operations = {
5191         .compare_fids = smb2_compare_fids,
5192         .setup_request = smb2_setup_request,
5193         .setup_async_request = smb2_setup_async_request,
5194         .check_receive = smb2_check_receive,
5195         .add_credits = smb2_add_credits,
5196         .set_credits = smb2_set_credits,
5197         .get_credits_field = smb2_get_credits_field,
5198         .get_credits = smb2_get_credits,
5199         .wait_mtu_credits = cifs_wait_mtu_credits,
5200         .get_next_mid = smb2_get_next_mid,
5201         .revert_current_mid = smb2_revert_current_mid,
5202         .read_data_offset = smb2_read_data_offset,
5203         .read_data_length = smb2_read_data_length,
5204         .map_error = map_smb2_to_linux_error,
5205         .find_mid = smb2_find_mid,
5206         .check_message = smb2_check_message,
5207         .dump_detail = smb2_dump_detail,
5208         .clear_stats = smb2_clear_stats,
5209         .print_stats = smb2_print_stats,
5210         .is_oplock_break = smb2_is_valid_oplock_break,
5211         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5212         .downgrade_oplock = smb2_downgrade_oplock,
5213         .need_neg = smb2_need_neg,
5214         .negotiate = smb2_negotiate,
5215         .negotiate_wsize = smb2_negotiate_wsize,
5216         .negotiate_rsize = smb2_negotiate_rsize,
5217         .sess_setup = SMB2_sess_setup,
5218         .logoff = SMB2_logoff,
5219         .tree_connect = SMB2_tcon,
5220         .tree_disconnect = SMB2_tdis,
5221         .qfs_tcon = smb2_qfs_tcon,
5222         .is_path_accessible = smb2_is_path_accessible,
5223         .can_echo = smb2_can_echo,
5224         .echo = SMB2_echo,
5225         .query_path_info = smb2_query_path_info,
5226         .get_srv_inum = smb2_get_srv_inum,
5227         .query_file_info = smb2_query_file_info,
5228         .set_path_size = smb2_set_path_size,
5229         .set_file_size = smb2_set_file_size,
5230         .set_file_info = smb2_set_file_info,
5231         .set_compression = smb2_set_compression,
5232         .mkdir = smb2_mkdir,
5233         .mkdir_setinfo = smb2_mkdir_setinfo,
5234         .rmdir = smb2_rmdir,
5235         .unlink = smb2_unlink,
5236         .rename = smb2_rename_path,
5237         .create_hardlink = smb2_create_hardlink,
5238         .query_symlink = smb2_query_symlink,
5239         .query_mf_symlink = smb3_query_mf_symlink,
5240         .create_mf_symlink = smb3_create_mf_symlink,
5241         .open = smb2_open_file,
5242         .set_fid = smb2_set_fid,
5243         .close = smb2_close_file,
5244         .flush = smb2_flush_file,
5245         .async_readv = smb2_async_readv,
5246         .async_writev = smb2_async_writev,
5247         .sync_read = smb2_sync_read,
5248         .sync_write = smb2_sync_write,
5249         .query_dir_first = smb2_query_dir_first,
5250         .query_dir_next = smb2_query_dir_next,
5251         .close_dir = smb2_close_dir,
5252         .calc_smb_size = smb2_calc_size,
5253         .is_status_pending = smb2_is_status_pending,
5254         .is_session_expired = smb2_is_session_expired,
5255         .oplock_response = smb2_oplock_response,
5256         .queryfs = smb2_queryfs,
5257         .mand_lock = smb2_mand_lock,
5258         .mand_unlock_range = smb2_unlock_range,
5259         .push_mand_locks = smb2_push_mandatory_locks,
5260         .get_lease_key = smb2_get_lease_key,
5261         .set_lease_key = smb2_set_lease_key,
5262         .new_lease_key = smb2_new_lease_key,
5263         .calc_signature = smb2_calc_signature,
5264         .is_read_op = smb2_is_read_op,
5265         .set_oplock_level = smb2_set_oplock_level,
5266         .create_lease_buf = smb2_create_lease_buf,
5267         .parse_lease_buf = smb2_parse_lease_buf,
5268         .copychunk_range = smb2_copychunk_range,
5269         .wp_retry_size = smb2_wp_retry_size,
5270         .dir_needs_close = smb2_dir_needs_close,
5271         .get_dfs_refer = smb2_get_dfs_refer,
5272         .select_sectype = smb2_select_sectype,
5273 #ifdef CONFIG_CIFS_XATTR
5274         .query_all_EAs = smb2_query_eas,
5275         .set_EA = smb2_set_ea,
5276 #endif /* CIFS_XATTR */
5277         .get_acl = get_smb2_acl,
5278         .get_acl_by_fid = get_smb2_acl_by_fid,
5279         .set_acl = set_smb2_acl,
5280         .next_header = smb2_next_header,
5281         .ioctl_query_info = smb2_ioctl_query_info,
5282         .make_node = smb2_make_node,
5283         .fiemap = smb3_fiemap,
5284         .llseek = smb3_llseek,
5285         .is_status_io_timeout = smb2_is_status_io_timeout,
5286         .is_network_name_deleted = smb2_is_network_name_deleted,
5287 };
5288 #endif /* CIFS_ALLOW_INSECURE_LEGACY */
5289
5290 struct smb_version_operations smb21_operations = {
5291         .compare_fids = smb2_compare_fids,
5292         .setup_request = smb2_setup_request,
5293         .setup_async_request = smb2_setup_async_request,
5294         .check_receive = smb2_check_receive,
5295         .add_credits = smb2_add_credits,
5296         .set_credits = smb2_set_credits,
5297         .get_credits_field = smb2_get_credits_field,
5298         .get_credits = smb2_get_credits,
5299         .wait_mtu_credits = smb2_wait_mtu_credits,
5300         .adjust_credits = smb2_adjust_credits,
5301         .get_next_mid = smb2_get_next_mid,
5302         .revert_current_mid = smb2_revert_current_mid,
5303         .read_data_offset = smb2_read_data_offset,
5304         .read_data_length = smb2_read_data_length,
5305         .map_error = map_smb2_to_linux_error,
5306         .find_mid = smb2_find_mid,
5307         .check_message = smb2_check_message,
5308         .dump_detail = smb2_dump_detail,
5309         .clear_stats = smb2_clear_stats,
5310         .print_stats = smb2_print_stats,
5311         .is_oplock_break = smb2_is_valid_oplock_break,
5312         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5313         .downgrade_oplock = smb2_downgrade_oplock,
5314         .need_neg = smb2_need_neg,
5315         .negotiate = smb2_negotiate,
5316         .negotiate_wsize = smb2_negotiate_wsize,
5317         .negotiate_rsize = smb2_negotiate_rsize,
5318         .sess_setup = SMB2_sess_setup,
5319         .logoff = SMB2_logoff,
5320         .tree_connect = SMB2_tcon,
5321         .tree_disconnect = SMB2_tdis,
5322         .qfs_tcon = smb2_qfs_tcon,
5323         .is_path_accessible = smb2_is_path_accessible,
5324         .can_echo = smb2_can_echo,
5325         .echo = SMB2_echo,
5326         .query_path_info = smb2_query_path_info,
5327         .get_srv_inum = smb2_get_srv_inum,
5328         .query_file_info = smb2_query_file_info,
5329         .set_path_size = smb2_set_path_size,
5330         .set_file_size = smb2_set_file_size,
5331         .set_file_info = smb2_set_file_info,
5332         .set_compression = smb2_set_compression,
5333         .mkdir = smb2_mkdir,
5334         .mkdir_setinfo = smb2_mkdir_setinfo,
5335         .rmdir = smb2_rmdir,
5336         .unlink = smb2_unlink,
5337         .rename = smb2_rename_path,
5338         .create_hardlink = smb2_create_hardlink,
5339         .query_symlink = smb2_query_symlink,
5340         .query_mf_symlink = smb3_query_mf_symlink,
5341         .create_mf_symlink = smb3_create_mf_symlink,
5342         .open = smb2_open_file,
5343         .set_fid = smb2_set_fid,
5344         .close = smb2_close_file,
5345         .flush = smb2_flush_file,
5346         .async_readv = smb2_async_readv,
5347         .async_writev = smb2_async_writev,
5348         .sync_read = smb2_sync_read,
5349         .sync_write = smb2_sync_write,
5350         .query_dir_first = smb2_query_dir_first,
5351         .query_dir_next = smb2_query_dir_next,
5352         .close_dir = smb2_close_dir,
5353         .calc_smb_size = smb2_calc_size,
5354         .is_status_pending = smb2_is_status_pending,
5355         .is_session_expired = smb2_is_session_expired,
5356         .oplock_response = smb2_oplock_response,
5357         .queryfs = smb2_queryfs,
5358         .mand_lock = smb2_mand_lock,
5359         .mand_unlock_range = smb2_unlock_range,
5360         .push_mand_locks = smb2_push_mandatory_locks,
5361         .get_lease_key = smb2_get_lease_key,
5362         .set_lease_key = smb2_set_lease_key,
5363         .new_lease_key = smb2_new_lease_key,
5364         .calc_signature = smb2_calc_signature,
5365         .is_read_op = smb21_is_read_op,
5366         .set_oplock_level = smb21_set_oplock_level,
5367         .create_lease_buf = smb2_create_lease_buf,
5368         .parse_lease_buf = smb2_parse_lease_buf,
5369         .copychunk_range = smb2_copychunk_range,
5370         .wp_retry_size = smb2_wp_retry_size,
5371         .dir_needs_close = smb2_dir_needs_close,
5372         .enum_snapshots = smb3_enum_snapshots,
5373         .notify = smb3_notify,
5374         .get_dfs_refer = smb2_get_dfs_refer,
5375         .select_sectype = smb2_select_sectype,
5376 #ifdef CONFIG_CIFS_XATTR
5377         .query_all_EAs = smb2_query_eas,
5378         .set_EA = smb2_set_ea,
5379 #endif /* CIFS_XATTR */
5380         .get_acl = get_smb2_acl,
5381         .get_acl_by_fid = get_smb2_acl_by_fid,
5382         .set_acl = set_smb2_acl,
5383         .next_header = smb2_next_header,
5384         .ioctl_query_info = smb2_ioctl_query_info,
5385         .make_node = smb2_make_node,
5386         .fiemap = smb3_fiemap,
5387         .llseek = smb3_llseek,
5388         .is_status_io_timeout = smb2_is_status_io_timeout,
5389         .is_network_name_deleted = smb2_is_network_name_deleted,
5390 };
5391
5392 struct smb_version_operations smb30_operations = {
5393         .compare_fids = smb2_compare_fids,
5394         .setup_request = smb2_setup_request,
5395         .setup_async_request = smb2_setup_async_request,
5396         .check_receive = smb2_check_receive,
5397         .add_credits = smb2_add_credits,
5398         .set_credits = smb2_set_credits,
5399         .get_credits_field = smb2_get_credits_field,
5400         .get_credits = smb2_get_credits,
5401         .wait_mtu_credits = smb2_wait_mtu_credits,
5402         .adjust_credits = smb2_adjust_credits,
5403         .get_next_mid = smb2_get_next_mid,
5404         .revert_current_mid = smb2_revert_current_mid,
5405         .read_data_offset = smb2_read_data_offset,
5406         .read_data_length = smb2_read_data_length,
5407         .map_error = map_smb2_to_linux_error,
5408         .find_mid = smb2_find_mid,
5409         .check_message = smb2_check_message,
5410         .dump_detail = smb2_dump_detail,
5411         .clear_stats = smb2_clear_stats,
5412         .print_stats = smb2_print_stats,
5413         .dump_share_caps = smb2_dump_share_caps,
5414         .is_oplock_break = smb2_is_valid_oplock_break,
5415         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5416         .downgrade_oplock = smb3_downgrade_oplock,
5417         .need_neg = smb2_need_neg,
5418         .negotiate = smb2_negotiate,
5419         .negotiate_wsize = smb3_negotiate_wsize,
5420         .negotiate_rsize = smb3_negotiate_rsize,
5421         .sess_setup = SMB2_sess_setup,
5422         .logoff = SMB2_logoff,
5423         .tree_connect = SMB2_tcon,
5424         .tree_disconnect = SMB2_tdis,
5425         .qfs_tcon = smb3_qfs_tcon,
5426         .is_path_accessible = smb2_is_path_accessible,
5427         .can_echo = smb2_can_echo,
5428         .echo = SMB2_echo,
5429         .query_path_info = smb2_query_path_info,
5430         /* WSL tags introduced long after smb2.1, enable for SMB3, 3.11 only */
5431         .query_reparse_tag = smb2_query_reparse_tag,
5432         .get_srv_inum = smb2_get_srv_inum,
5433         .query_file_info = smb2_query_file_info,
5434         .set_path_size = smb2_set_path_size,
5435         .set_file_size = smb2_set_file_size,
5436         .set_file_info = smb2_set_file_info,
5437         .set_compression = smb2_set_compression,
5438         .mkdir = smb2_mkdir,
5439         .mkdir_setinfo = smb2_mkdir_setinfo,
5440         .rmdir = smb2_rmdir,
5441         .unlink = smb2_unlink,
5442         .rename = smb2_rename_path,
5443         .create_hardlink = smb2_create_hardlink,
5444         .query_symlink = smb2_query_symlink,
5445         .query_mf_symlink = smb3_query_mf_symlink,
5446         .create_mf_symlink = smb3_create_mf_symlink,
5447         .open = smb2_open_file,
5448         .set_fid = smb2_set_fid,
5449         .close = smb2_close_file,
5450         .close_getattr = smb2_close_getattr,
5451         .flush = smb2_flush_file,
5452         .async_readv = smb2_async_readv,
5453         .async_writev = smb2_async_writev,
5454         .sync_read = smb2_sync_read,
5455         .sync_write = smb2_sync_write,
5456         .query_dir_first = smb2_query_dir_first,
5457         .query_dir_next = smb2_query_dir_next,
5458         .close_dir = smb2_close_dir,
5459         .calc_smb_size = smb2_calc_size,
5460         .is_status_pending = smb2_is_status_pending,
5461         .is_session_expired = smb2_is_session_expired,
5462         .oplock_response = smb2_oplock_response,
5463         .queryfs = smb2_queryfs,
5464         .mand_lock = smb2_mand_lock,
5465         .mand_unlock_range = smb2_unlock_range,
5466         .push_mand_locks = smb2_push_mandatory_locks,
5467         .get_lease_key = smb2_get_lease_key,
5468         .set_lease_key = smb2_set_lease_key,
5469         .new_lease_key = smb2_new_lease_key,
5470         .generate_signingkey = generate_smb30signingkey,
5471         .calc_signature = smb3_calc_signature,
5472         .set_integrity  = smb3_set_integrity,
5473         .is_read_op = smb21_is_read_op,
5474         .set_oplock_level = smb3_set_oplock_level,
5475         .create_lease_buf = smb3_create_lease_buf,
5476         .parse_lease_buf = smb3_parse_lease_buf,
5477         .copychunk_range = smb2_copychunk_range,
5478         .duplicate_extents = smb2_duplicate_extents,
5479         .validate_negotiate = smb3_validate_negotiate,
5480         .wp_retry_size = smb2_wp_retry_size,
5481         .dir_needs_close = smb2_dir_needs_close,
5482         .fallocate = smb3_fallocate,
5483         .enum_snapshots = smb3_enum_snapshots,
5484         .notify = smb3_notify,
5485         .init_transform_rq = smb3_init_transform_rq,
5486         .is_transform_hdr = smb3_is_transform_hdr,
5487         .receive_transform = smb3_receive_transform,
5488         .get_dfs_refer = smb2_get_dfs_refer,
5489         .select_sectype = smb2_select_sectype,
5490 #ifdef CONFIG_CIFS_XATTR
5491         .query_all_EAs = smb2_query_eas,
5492         .set_EA = smb2_set_ea,
5493 #endif /* CIFS_XATTR */
5494         .get_acl = get_smb2_acl,
5495         .get_acl_by_fid = get_smb2_acl_by_fid,
5496         .set_acl = set_smb2_acl,
5497         .next_header = smb2_next_header,
5498         .ioctl_query_info = smb2_ioctl_query_info,
5499         .make_node = smb2_make_node,
5500         .fiemap = smb3_fiemap,
5501         .llseek = smb3_llseek,
5502         .is_status_io_timeout = smb2_is_status_io_timeout,
5503         .is_network_name_deleted = smb2_is_network_name_deleted,
5504 };
5505
5506 struct smb_version_operations smb311_operations = {
5507         .compare_fids = smb2_compare_fids,
5508         .setup_request = smb2_setup_request,
5509         .setup_async_request = smb2_setup_async_request,
5510         .check_receive = smb2_check_receive,
5511         .add_credits = smb2_add_credits,
5512         .set_credits = smb2_set_credits,
5513         .get_credits_field = smb2_get_credits_field,
5514         .get_credits = smb2_get_credits,
5515         .wait_mtu_credits = smb2_wait_mtu_credits,
5516         .adjust_credits = smb2_adjust_credits,
5517         .get_next_mid = smb2_get_next_mid,
5518         .revert_current_mid = smb2_revert_current_mid,
5519         .read_data_offset = smb2_read_data_offset,
5520         .read_data_length = smb2_read_data_length,
5521         .map_error = map_smb2_to_linux_error,
5522         .find_mid = smb2_find_mid,
5523         .check_message = smb2_check_message,
5524         .dump_detail = smb2_dump_detail,
5525         .clear_stats = smb2_clear_stats,
5526         .print_stats = smb2_print_stats,
5527         .dump_share_caps = smb2_dump_share_caps,
5528         .is_oplock_break = smb2_is_valid_oplock_break,
5529         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5530         .downgrade_oplock = smb3_downgrade_oplock,
5531         .need_neg = smb2_need_neg,
5532         .negotiate = smb2_negotiate,
5533         .negotiate_wsize = smb3_negotiate_wsize,
5534         .negotiate_rsize = smb3_negotiate_rsize,
5535         .sess_setup = SMB2_sess_setup,
5536         .logoff = SMB2_logoff,
5537         .tree_connect = SMB2_tcon,
5538         .tree_disconnect = SMB2_tdis,
5539         .qfs_tcon = smb3_qfs_tcon,
5540         .is_path_accessible = smb2_is_path_accessible,
5541         .can_echo = smb2_can_echo,
5542         .echo = SMB2_echo,
5543         .query_path_info = smb2_query_path_info,
5544         .query_reparse_tag = smb2_query_reparse_tag,
5545         .get_srv_inum = smb2_get_srv_inum,
5546         .query_file_info = smb2_query_file_info,
5547         .set_path_size = smb2_set_path_size,
5548         .set_file_size = smb2_set_file_size,
5549         .set_file_info = smb2_set_file_info,
5550         .set_compression = smb2_set_compression,
5551         .mkdir = smb2_mkdir,
5552         .mkdir_setinfo = smb2_mkdir_setinfo,
5553         .posix_mkdir = smb311_posix_mkdir,
5554         .rmdir = smb2_rmdir,
5555         .unlink = smb2_unlink,
5556         .rename = smb2_rename_path,
5557         .create_hardlink = smb2_create_hardlink,
5558         .query_symlink = smb2_query_symlink,
5559         .query_mf_symlink = smb3_query_mf_symlink,
5560         .create_mf_symlink = smb3_create_mf_symlink,
5561         .open = smb2_open_file,
5562         .set_fid = smb2_set_fid,
5563         .close = smb2_close_file,
5564         .close_getattr = smb2_close_getattr,
5565         .flush = smb2_flush_file,
5566         .async_readv = smb2_async_readv,
5567         .async_writev = smb2_async_writev,
5568         .sync_read = smb2_sync_read,
5569         .sync_write = smb2_sync_write,
5570         .query_dir_first = smb2_query_dir_first,
5571         .query_dir_next = smb2_query_dir_next,
5572         .close_dir = smb2_close_dir,
5573         .calc_smb_size = smb2_calc_size,
5574         .is_status_pending = smb2_is_status_pending,
5575         .is_session_expired = smb2_is_session_expired,
5576         .oplock_response = smb2_oplock_response,
5577         .queryfs = smb311_queryfs,
5578         .mand_lock = smb2_mand_lock,
5579         .mand_unlock_range = smb2_unlock_range,
5580         .push_mand_locks = smb2_push_mandatory_locks,
5581         .get_lease_key = smb2_get_lease_key,
5582         .set_lease_key = smb2_set_lease_key,
5583         .new_lease_key = smb2_new_lease_key,
5584         .generate_signingkey = generate_smb311signingkey,
5585         .calc_signature = smb3_calc_signature,
5586         .set_integrity  = smb3_set_integrity,
5587         .is_read_op = smb21_is_read_op,
5588         .set_oplock_level = smb3_set_oplock_level,
5589         .create_lease_buf = smb3_create_lease_buf,
5590         .parse_lease_buf = smb3_parse_lease_buf,
5591         .copychunk_range = smb2_copychunk_range,
5592         .duplicate_extents = smb2_duplicate_extents,
5593 /*      .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
5594         .wp_retry_size = smb2_wp_retry_size,
5595         .dir_needs_close = smb2_dir_needs_close,
5596         .fallocate = smb3_fallocate,
5597         .enum_snapshots = smb3_enum_snapshots,
5598         .notify = smb3_notify,
5599         .init_transform_rq = smb3_init_transform_rq,
5600         .is_transform_hdr = smb3_is_transform_hdr,
5601         .receive_transform = smb3_receive_transform,
5602         .get_dfs_refer = smb2_get_dfs_refer,
5603         .select_sectype = smb2_select_sectype,
5604 #ifdef CONFIG_CIFS_XATTR
5605         .query_all_EAs = smb2_query_eas,
5606         .set_EA = smb2_set_ea,
5607 #endif /* CIFS_XATTR */
5608         .get_acl = get_smb2_acl,
5609         .get_acl_by_fid = get_smb2_acl_by_fid,
5610         .set_acl = set_smb2_acl,
5611         .next_header = smb2_next_header,
5612         .ioctl_query_info = smb2_ioctl_query_info,
5613         .make_node = smb2_make_node,
5614         .fiemap = smb3_fiemap,
5615         .llseek = smb3_llseek,
5616         .is_status_io_timeout = smb2_is_status_io_timeout,
5617         .is_network_name_deleted = smb2_is_network_name_deleted,
5618 };
5619
5620 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
5621 struct smb_version_values smb20_values = {
5622         .version_string = SMB20_VERSION_STRING,
5623         .protocol_id = SMB20_PROT_ID,
5624         .req_capabilities = 0, /* MBZ */
5625         .large_lock_type = 0,
5626         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5627         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5628         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5629         .header_size = sizeof(struct smb2_hdr),
5630         .header_preamble_size = 0,
5631         .max_header_size = MAX_SMB2_HDR_SIZE,
5632         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5633         .lock_cmd = SMB2_LOCK,
5634         .cap_unix = 0,
5635         .cap_nt_find = SMB2_NT_FIND,
5636         .cap_large_files = SMB2_LARGE_FILES,
5637         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5638         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5639         .create_lease_size = sizeof(struct create_lease),
5640 };
5641 #endif /* ALLOW_INSECURE_LEGACY */
5642
5643 struct smb_version_values smb21_values = {
5644         .version_string = SMB21_VERSION_STRING,
5645         .protocol_id = SMB21_PROT_ID,
5646         .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
5647         .large_lock_type = 0,
5648         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5649         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5650         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5651         .header_size = sizeof(struct smb2_hdr),
5652         .header_preamble_size = 0,
5653         .max_header_size = MAX_SMB2_HDR_SIZE,
5654         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5655         .lock_cmd = SMB2_LOCK,
5656         .cap_unix = 0,
5657         .cap_nt_find = SMB2_NT_FIND,
5658         .cap_large_files = SMB2_LARGE_FILES,
5659         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5660         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5661         .create_lease_size = sizeof(struct create_lease),
5662 };
5663
5664 struct smb_version_values smb3any_values = {
5665         .version_string = SMB3ANY_VERSION_STRING,
5666         .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
5667         .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,
5668         .large_lock_type = 0,
5669         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5670         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5671         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5672         .header_size = sizeof(struct smb2_hdr),
5673         .header_preamble_size = 0,
5674         .max_header_size = MAX_SMB2_HDR_SIZE,
5675         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5676         .lock_cmd = SMB2_LOCK,
5677         .cap_unix = 0,
5678         .cap_nt_find = SMB2_NT_FIND,
5679         .cap_large_files = SMB2_LARGE_FILES,
5680         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5681         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5682         .create_lease_size = sizeof(struct create_lease_v2),
5683 };
5684
5685 struct smb_version_values smbdefault_values = {
5686         .version_string = SMBDEFAULT_VERSION_STRING,
5687         .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
5688         .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,
5689         .large_lock_type = 0,
5690         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5691         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5692         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5693         .header_size = sizeof(struct smb2_hdr),
5694         .header_preamble_size = 0,
5695         .max_header_size = MAX_SMB2_HDR_SIZE,
5696         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5697         .lock_cmd = SMB2_LOCK,
5698         .cap_unix = 0,
5699         .cap_nt_find = SMB2_NT_FIND,
5700         .cap_large_files = SMB2_LARGE_FILES,
5701         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5702         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5703         .create_lease_size = sizeof(struct create_lease_v2),
5704 };
5705
5706 struct smb_version_values smb30_values = {
5707         .version_string = SMB30_VERSION_STRING,
5708         .protocol_id = SMB30_PROT_ID,
5709         .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,
5710         .large_lock_type = 0,
5711         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5712         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5713         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5714         .header_size = sizeof(struct smb2_hdr),
5715         .header_preamble_size = 0,
5716         .max_header_size = MAX_SMB2_HDR_SIZE,
5717         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5718         .lock_cmd = SMB2_LOCK,
5719         .cap_unix = 0,
5720         .cap_nt_find = SMB2_NT_FIND,
5721         .cap_large_files = SMB2_LARGE_FILES,
5722         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5723         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5724         .create_lease_size = sizeof(struct create_lease_v2),
5725 };
5726
5727 struct smb_version_values smb302_values = {
5728         .version_string = SMB302_VERSION_STRING,
5729         .protocol_id = SMB302_PROT_ID,
5730         .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,
5731         .large_lock_type = 0,
5732         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5733         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5734         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5735         .header_size = sizeof(struct smb2_hdr),
5736         .header_preamble_size = 0,
5737         .max_header_size = MAX_SMB2_HDR_SIZE,
5738         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5739         .lock_cmd = SMB2_LOCK,
5740         .cap_unix = 0,
5741         .cap_nt_find = SMB2_NT_FIND,
5742         .cap_large_files = SMB2_LARGE_FILES,
5743         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5744         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5745         .create_lease_size = sizeof(struct create_lease_v2),
5746 };
5747
5748 struct smb_version_values smb311_values = {
5749         .version_string = SMB311_VERSION_STRING,
5750         .protocol_id = SMB311_PROT_ID,
5751         .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,
5752         .large_lock_type = 0,
5753         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5754         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5755         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5756         .header_size = sizeof(struct smb2_hdr),
5757         .header_preamble_size = 0,
5758         .max_header_size = MAX_SMB2_HDR_SIZE,
5759         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5760         .lock_cmd = SMB2_LOCK,
5761         .cap_unix = 0,
5762         .cap_nt_find = SMB2_NT_FIND,
5763         .cap_large_files = SMB2_LARGE_FILES,
5764         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5765         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5766         .create_lease_size = sizeof(struct create_lease_v2),
5767 };