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         /* do not query too frequently, this time with lock held */
 534         if (ses->iface_last_update &&
 535             time_before(jiffies, ses->iface_last_update +
 536                         (SMB_INTERFACE_POLL_INTERVAL * HZ))) {
 537                 spin_unlock(&ses->iface_lock);
 538                 return 0;
 539         }
 540
 541         /*
 542          * Go through iface_list and do kref_put to remove
 543          * any unused ifaces. ifaces in use will be removed
 544          * when the last user calls a kref_put on it
 545          */
 546         list_for_each_entry_safe(iface, niface, &ses->iface_list,
 547                                  iface_head) {
 548                 iface->is_active = 0;
 549                 kref_put(&iface->refcount, release_iface);
 550                 ses->iface_count--;
 551         }
 552         spin_unlock(&ses->iface_lock);
 553
 554         /*
 555          * Samba server e.g. can return an empty interface list in some cases,
 556          * which would only be a problem if we were requesting multichannel
 557          */
 558         if (bytes_left == 0) {
 559                 /* avoid spamming logs every 10 minutes, so log only in mount */
 560                 if ((ses->chan_max > 1) && in_mount)
 561                         cifs_dbg(VFS,
 562                                  "multichannel not available\n"
 563                                  "Empty network interface list returned by server %s\n",
 564                                  ses->server->hostname);
 565                 rc = -EINVAL;
 566                 goto out;
 567         }
 568
 569         while (bytes_left >= sizeof(*p)) {
 570                 memset(&tmp_iface, 0, sizeof(tmp_iface));
 571                 tmp_iface.speed = le64_to_cpu(p->LinkSpeed);
 572                 tmp_iface.rdma_capable = le32_to_cpu(p->Capability & RDMA_CAPABLE) ? 1 : 0;
 573                 tmp_iface.rss_capable = le32_to_cpu(p->Capability & RSS_CAPABLE) ? 1 : 0;
 574
 575                 switch (p->Family) {
 576                 /*
 577                  * The kernel and wire socket structures have the same
 578                  * layout and use network byte order but make the
 579                  * conversion explicit in case either one changes.
 580                  */
 581                 case INTERNETWORK:
 582                         addr4 = (struct sockaddr_in *)&tmp_iface.sockaddr;
 583                         p4 = (struct iface_info_ipv4 *)p->Buffer;
 584                         addr4->sin_family = AF_INET;
 585                         memcpy(&addr4->sin_addr, &p4->IPv4Address, 4);
 586
 587                         /* [MS-SMB2] 2.2.32.5.1.1 Clients MUST ignore these */
 588                         addr4->sin_port = cpu_to_be16(CIFS_PORT);
 589
 590                         cifs_dbg(FYI, "%s: ipv4 %pI4\n", __func__,
 591                                  &addr4->sin_addr);
 592                         break;
 593                 case INTERNETWORKV6:
 594                         addr6 = (struct sockaddr_in6 *)&tmp_iface.sockaddr;
 595                         p6 = (struct iface_info_ipv6 *)p->Buffer;
 596                         addr6->sin6_family = AF_INET6;
 597                         memcpy(&addr6->sin6_addr, &p6->IPv6Address, 16);
 598
 599                         /* [MS-SMB2] 2.2.32.5.1.2 Clients MUST ignore these */
 600                         addr6->sin6_flowinfo = 0;
 601                         addr6->sin6_scope_id = 0;
 602                         addr6->sin6_port = cpu_to_be16(CIFS_PORT);
 603
 604                         cifs_dbg(FYI, "%s: ipv6 %pI6\n", __func__,
 605                                  &addr6->sin6_addr);
 606                         break;
 607                 default:
 608                         cifs_dbg(VFS,
 609                                  "%s: skipping unsupported socket family\n",
 610                                  __func__);
 611                         goto next_iface;
 612                 }
 613
 614                 /*
 615                  * The iface_list is assumed to be sorted by speed.
 616                  * Check if the new interface exists in that list.
 617                  * NEVER change iface. it could be in use.
 618                  * Add a new one instead
 619                  */
 620                 spin_lock(&ses->iface_lock);
 621                 iface = niface = NULL;
 622                 list_for_each_entry_safe(iface, niface, &ses->iface_list,
 623                                          iface_head) {
 624                         ret = iface_cmp(iface, &tmp_iface);
 625                         if (!ret) {
 626                                 /* just get a ref so that it doesn't get picked/freed */
 627                                 iface->is_active = 1;
 628                                 kref_get(&iface->refcount);
 629                                 ses->iface_count++;
 630                                 spin_unlock(&ses->iface_lock);
 631                                 goto next_iface;
 632                         } else if (ret < 0) {
 633                                 /* all remaining ifaces are slower */
 634                                 kref_get(&iface->refcount);
 635                                 break;
 636                         }
 637                 }
 638                 spin_unlock(&ses->iface_lock);
 639
 640                 /* no match. insert the entry in the list */
 641                 info = kmalloc(sizeof(struct cifs_server_iface),
 642                                GFP_KERNEL);
 643                 if (!info) {
 644                         rc = -ENOMEM;
 645                         goto out;
 646                 }
 647                 memcpy(info, &tmp_iface, sizeof(tmp_iface));
 648
 649                 /* add this new entry to the list */
 650                 kref_init(&info->refcount);
 651                 info->is_active = 1;
 652
 653                 cifs_dbg(FYI, "%s: adding iface %zu\n", __func__, ses->iface_count);
 654                 cifs_dbg(FYI, "%s: speed %zu bps\n", __func__, info->speed);
 655                 cifs_dbg(FYI, "%s: capabilities 0x%08x\n", __func__,
 656                          le32_to_cpu(p->Capability));
 657
 658                 spin_lock(&ses->iface_lock);
 659                 if (!list_entry_is_head(iface, &ses->iface_list, iface_head)) {
 660                         list_add_tail(&info->iface_head, &iface->iface_head);
 661                         kref_put(&iface->refcount, release_iface);
 662                 } else
 663                         list_add_tail(&info->iface_head, &ses->iface_list);
 664
 665                 ses->iface_count++;
 666                 spin_unlock(&ses->iface_lock);
 667                 ses->iface_last_update = jiffies;
 668 next_iface:
 669                 nb_iface++;
 670                 next = le32_to_cpu(p->Next);
 671                 if (!next) {
 672                         bytes_left -= sizeof(*p);
 673                         break;
 674                 }
 675                 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
 676                 bytes_left -= next;
 677         }
 678
 679         if (!nb_iface) {
 680                 cifs_dbg(VFS, "%s: malformed interface info\n", __func__);
 681                 rc = -EINVAL;
 682                 goto out;
 683         }
 684
 685         /* Azure rounds the buffer size up 8, to a 16 byte boundary */
 686         if ((bytes_left > 8) || p->Next)
 687                 cifs_dbg(VFS, "%s: incomplete interface info\n", __func__);
 688
 689
 690         if (!ses->iface_count) {
 691                 rc = -EINVAL;
 692                 goto out;
 693         }
 694
 695 out:
 696         return rc;
 697 }
 698
 699 int
 700 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon, bool in_mount)
 701 {
 702         int rc;
 703         unsigned int ret_data_len = 0;
 704         struct network_interface_info_ioctl_rsp *out_buf = NULL;
 705         struct cifs_ses *ses = tcon->ses;
 706
 707         /* do not query too frequently */
 708         if (ses->iface_last_update &&
 709             time_before(jiffies, ses->iface_last_update +
 710                         (SMB_INTERFACE_POLL_INTERVAL * HZ)))
 711                 return 0;
 712
 713         rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
 714                         FSCTL_QUERY_NETWORK_INTERFACE_INFO,
 715                         NULL /* no data input */, 0 /* no data input */,
 716                         CIFSMaxBufSize, (char **)&out_buf, &ret_data_len);
 717         if (rc == -EOPNOTSUPP) {
 718                 cifs_dbg(FYI,
 719                          "server does not support query network interfaces\n");
 720                 ret_data_len = 0;
 721         } else if (rc != 0) {
 722                 cifs_tcon_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
 723                 goto out;
 724         }
 725
 726         rc = parse_server_interfaces(out_buf, ret_data_len, ses, in_mount);
 727         if (rc)
 728                 goto out;
 729
 730 out:
 731         kfree(out_buf);
 732         return rc;
 733 }
 734
 735 static void
 736 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
 737               struct cifs_sb_info *cifs_sb)
 738 {
 739         int rc;
 740         __le16 srch_path = 0; /* Null - open root of share */
 741         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 742         struct cifs_open_parms oparms;
 743         struct cifs_fid fid;
 744         struct cached_fid *cfid = NULL;
 745
 746         oparms = (struct cifs_open_parms) {
 747                 .tcon = tcon,
 748                 .path = "",
 749                 .desired_access = FILE_READ_ATTRIBUTES,
 750                 .disposition = FILE_OPEN,
 751                 .create_options = cifs_create_options(cifs_sb, 0),
 752                 .fid = &fid,
 753         };
 754
 755         rc = open_cached_dir(xid, tcon, "", cifs_sb, false, &cfid);
 756         if (rc == 0)
 757                 memcpy(&fid, &cfid->fid, sizeof(struct cifs_fid));
 758         else
 759                 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
 760                                NULL, NULL);
 761         if (rc)
 762                 return;
 763
 764         SMB3_request_interfaces(xid, tcon, true /* called during  mount */);
 765
 766         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 767                         FS_ATTRIBUTE_INFORMATION);
 768         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 769                         FS_DEVICE_INFORMATION);
 770         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 771                         FS_VOLUME_INFORMATION);
 772         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 773                         FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
 774         if (cfid == NULL)
 775                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 776         else
 777                 close_cached_dir(cfid);
 778 }
 779
 780 static void
 781 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
 782               struct cifs_sb_info *cifs_sb)
 783 {
 784         int rc;
 785         __le16 srch_path = 0; /* Null - open root of share */
 786         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 787         struct cifs_open_parms oparms;
 788         struct cifs_fid fid;
 789
 790         oparms = (struct cifs_open_parms) {
 791                 .tcon = tcon,
 792                 .path = "",
 793                 .desired_access = FILE_READ_ATTRIBUTES,
 794                 .disposition = FILE_OPEN,
 795                 .create_options = cifs_create_options(cifs_sb, 0),
 796                 .fid = &fid,
 797         };
 798
 799         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
 800                        NULL, NULL);
 801         if (rc)
 802                 return;
 803
 804         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 805                         FS_ATTRIBUTE_INFORMATION);
 806         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 807                         FS_DEVICE_INFORMATION);
 808         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 809 }
 810
 811 static int
 812 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
 813                         struct cifs_sb_info *cifs_sb, const char *full_path)
 814 {
 815         __le16 *utf16_path;
 816         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 817         int err_buftype = CIFS_NO_BUFFER;
 818         struct cifs_open_parms oparms;
 819         struct kvec err_iov = {};
 820         struct cifs_fid fid;
 821         struct cached_fid *cfid;
 822         bool islink;
 823         int rc, rc2;
 824
 825         rc = open_cached_dir(xid, tcon, full_path, cifs_sb, true, &cfid);
 826         if (!rc) {
 827                 if (cfid->has_lease) {
 828                         close_cached_dir(cfid);
 829                         return 0;
 830                 }
 831                 close_cached_dir(cfid);
 832         }
 833
 834         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
 835         if (!utf16_path)
 836                 return -ENOMEM;
 837
 838         oparms = (struct cifs_open_parms) {
 839                 .tcon = tcon,
 840                 .path = full_path,
 841                 .desired_access = FILE_READ_ATTRIBUTES,
 842                 .disposition = FILE_OPEN,
 843                 .create_options = cifs_create_options(cifs_sb, 0),
 844                 .fid = &fid,
 845         };
 846
 847         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL,
 848                        &err_iov, &err_buftype);
 849         if (rc) {
 850                 struct smb2_hdr *hdr = err_iov.iov_base;
 851
 852                 if (unlikely(!hdr || err_buftype == CIFS_NO_BUFFER))
 853                         goto out;
 854
 855                 if (rc != -EREMOTE && hdr->Status == STATUS_OBJECT_NAME_INVALID) {
 856                         rc2 = cifs_inval_name_dfs_link_error(xid, tcon, cifs_sb,
 857                                                              full_path, &islink);
 858                         if (rc2) {
 859                                 rc = rc2;
 860                                 goto out;
 861                         }
 862                         if (islink)
 863                                 rc = -EREMOTE;
 864                 }
 865                 if (rc == -EREMOTE && IS_ENABLED(CONFIG_CIFS_DFS_UPCALL) && cifs_sb &&
 866                     (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_DFS))
 867                         rc = -EOPNOTSUPP;
 868                 goto out;
 869         }
 870
 871         rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 872
 873 out:
 874         free_rsp_buf(err_buftype, err_iov.iov_base);
 875         kfree(utf16_path);
 876         return rc;
 877 }
 878
 879 static int smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
 880                              struct cifs_sb_info *cifs_sb, const char *full_path,
 881                              u64 *uniqueid, struct cifs_open_info_data *data)
 882 {
 883         *uniqueid = le64_to_cpu(data->fi.IndexNumber);
 884         return 0;
 885 }
 886
 887 static int smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
 888                                 struct cifsFileInfo *cfile, struct cifs_open_info_data *data)
 889 {
 890         struct cifs_fid *fid = &cfile->fid;
 891
 892         if (cfile->symlink_target) {
 893                 data->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL);
 894                 if (!data->symlink_target)
 895                         return -ENOMEM;
 896         }
 897         return SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid, &data->fi);
 898 }
 899
 900 #ifdef CONFIG_CIFS_XATTR
 901 static ssize_t
 902 move_smb2_ea_to_cifs(char *dst, size_t dst_size,
 903                      struct smb2_file_full_ea_info *src, size_t src_size,
 904                      const unsigned char *ea_name)
 905 {
 906         int rc = 0;
 907         unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0;
 908         char *name, *value;
 909         size_t buf_size = dst_size;
 910         size_t name_len, value_len, user_name_len;
 911
 912         while (src_size > 0) {
 913                 name_len = (size_t)src->ea_name_length;
 914                 value_len = (size_t)le16_to_cpu(src->ea_value_length);
 915
 916                 if (name_len == 0)
 917                         break;
 918
 919                 if (src_size < 8 + name_len + 1 + value_len) {
 920                         cifs_dbg(FYI, "EA entry goes beyond length of list\n");
 921                         rc = -EIO;
 922                         goto out;
 923                 }
 924
 925                 name = &src->ea_data[0];
 926                 value = &src->ea_data[src->ea_name_length + 1];
 927
 928                 if (ea_name) {
 929                         if (ea_name_len == name_len &&
 930                             memcmp(ea_name, name, name_len) == 0) {
 931                                 rc = value_len;
 932                                 if (dst_size == 0)
 933                                         goto out;
 934                                 if (dst_size < value_len) {
 935                                         rc = -ERANGE;
 936                                         goto out;
 937                                 }
 938                                 memcpy(dst, value, value_len);
 939                                 goto out;
 940                         }
 941                 } else {
 942                         /* 'user.' plus a terminating null */
 943                         user_name_len = 5 + 1 + name_len;
 944
 945                         if (buf_size == 0) {
 946                                 /* skip copy - calc size only */
 947                                 rc += user_name_len;
 948                         } else if (dst_size >= user_name_len) {
 949                                 dst_size -= user_name_len;
 950                                 memcpy(dst, "user.", 5);
 951                                 dst += 5;
 952                                 memcpy(dst, src->ea_data, name_len);
 953                                 dst += name_len;
 954                                 *dst = 0;
 955                                 ++dst;
 956                                 rc += user_name_len;
 957                         } else {
 958                                 /* stop before overrun buffer */
 959                                 rc = -ERANGE;
 960                                 break;
 961                         }
 962                 }
 963
 964                 if (!src->next_entry_offset)
 965                         break;
 966
 967                 if (src_size < le32_to_cpu(src->next_entry_offset)) {
 968                         /* stop before overrun buffer */
 969                         rc = -ERANGE;
 970                         break;
 971                 }
 972                 src_size -= le32_to_cpu(src->next_entry_offset);
 973                 src = (void *)((char *)src +
 974                                le32_to_cpu(src->next_entry_offset));
 975         }
 976
 977         /* didn't find the named attribute */
 978         if (ea_name)
 979                 rc = -ENODATA;
 980
 981 out:
 982         return (ssize_t)rc;
 983 }
 984
 985 static ssize_t
 986 smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
 987                const unsigned char *path, const unsigned char *ea_name,
 988                char *ea_data, size_t buf_size,
 989                struct cifs_sb_info *cifs_sb)
 990 {
 991         int rc;
 992         struct kvec rsp_iov = {NULL, 0};
 993         int buftype = CIFS_NO_BUFFER;
 994         struct smb2_query_info_rsp *rsp;
 995         struct smb2_file_full_ea_info *info = NULL;
 996
 997         rc = smb2_query_info_compound(xid, tcon, path,
 998                                       FILE_READ_EA,
 999                                       FILE_FULL_EA_INFORMATION,
1000                                       SMB2_O_INFO_FILE,
1001                                       CIFSMaxBufSize -
1002                                       MAX_SMB2_CREATE_RESPONSE_SIZE -
1003                                       MAX_SMB2_CLOSE_RESPONSE_SIZE,
1004                                       &rsp_iov, &buftype, cifs_sb);
1005         if (rc) {
1006                 /*
1007                  * If ea_name is NULL (listxattr) and there are no EAs,
1008                  * return 0 as it's not an error. Otherwise, the specified
1009                  * ea_name was not found.
1010                  */
1011                 if (!ea_name && rc == -ENODATA)
1012                         rc = 0;
1013                 goto qeas_exit;
1014         }
1015
1016         rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
1017         rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
1018                                le32_to_cpu(rsp->OutputBufferLength),
1019                                &rsp_iov,
1020                                sizeof(struct smb2_file_full_ea_info));
1021         if (rc)
1022                 goto qeas_exit;
1023
1024         info = (struct smb2_file_full_ea_info *)(
1025                         le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
1026         rc = move_smb2_ea_to_cifs(ea_data, buf_size, info,
1027                         le32_to_cpu(rsp->OutputBufferLength), ea_name);
1028
1029  qeas_exit:
1030         free_rsp_buf(buftype, rsp_iov.iov_base);
1031         return rc;
1032 }
1033
1034
1035 static int
1036 smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
1037             const char *path, const char *ea_name, const void *ea_value,
1038             const __u16 ea_value_len, const struct nls_table *nls_codepage,
1039             struct cifs_sb_info *cifs_sb)
1040 {
1041         struct cifs_ses *ses = tcon->ses;
1042         struct TCP_Server_Info *server = cifs_pick_channel(ses);
1043         __le16 *utf16_path = NULL;
1044         int ea_name_len = strlen(ea_name);
1045         int flags = CIFS_CP_CREATE_CLOSE_OP;
1046         int len;
1047         struct smb_rqst rqst[3];
1048         int resp_buftype[3];
1049         struct kvec rsp_iov[3];
1050         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
1051         struct cifs_open_parms oparms;
1052         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1053         struct cifs_fid fid;
1054         struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE];
1055         unsigned int size[1];
1056         void *data[1];
1057         struct smb2_file_full_ea_info *ea = NULL;
1058         struct kvec close_iov[1];
1059         struct smb2_query_info_rsp *rsp;
1060         int rc, used_len = 0;
1061
1062         if (smb3_encryption_required(tcon))
1063                 flags |= CIFS_TRANSFORM_REQ;
1064
1065         if (ea_name_len > 255)
1066                 return -EINVAL;
1067
1068         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1069         if (!utf16_path)
1070                 return -ENOMEM;
1071
1072         memset(rqst, 0, sizeof(rqst));
1073         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1074         memset(rsp_iov, 0, sizeof(rsp_iov));
1075
1076         if (ses->server->ops->query_all_EAs) {
1077                 if (!ea_value) {
1078                         rc = ses->server->ops->query_all_EAs(xid, tcon, path,
1079                                                              ea_name, NULL, 0,
1080                                                              cifs_sb);
1081                         if (rc == -ENODATA)
1082                                 goto sea_exit;
1083                 } else {
1084                         /* If we are adding a attribute we should first check
1085                          * if there will be enough space available to store
1086                          * the new EA. If not we should not add it since we
1087                          * would not be able to even read the EAs back.
1088                          */
1089                         rc = smb2_query_info_compound(xid, tcon, path,
1090                                       FILE_READ_EA,
1091                                       FILE_FULL_EA_INFORMATION,
1092                                       SMB2_O_INFO_FILE,
1093                                       CIFSMaxBufSize -
1094                                       MAX_SMB2_CREATE_RESPONSE_SIZE -
1095                                       MAX_SMB2_CLOSE_RESPONSE_SIZE,
1096                                       &rsp_iov[1], &resp_buftype[1], cifs_sb);
1097                         if (rc == 0) {
1098                                 rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1099                                 used_len = le32_to_cpu(rsp->OutputBufferLength);
1100                         }
1101                         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1102                         resp_buftype[1] = CIFS_NO_BUFFER;
1103                         memset(&rsp_iov[1], 0, sizeof(rsp_iov[1]));
1104                         rc = 0;
1105
1106                         /* Use a fudge factor of 256 bytes in case we collide
1107                          * with a different set_EAs command.
1108                          */
1109                         if(CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE -
1110                            MAX_SMB2_CLOSE_RESPONSE_SIZE - 256 <
1111                            used_len + ea_name_len + ea_value_len + 1) {
1112                                 rc = -ENOSPC;
1113                                 goto sea_exit;
1114                         }
1115                 }
1116         }
1117
1118         /* Open */
1119         memset(&open_iov, 0, sizeof(open_iov));
1120         rqst[0].rq_iov = open_iov;
1121         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1122
1123         oparms = (struct cifs_open_parms) {
1124                 .tcon = tcon,
1125                 .path = path,
1126                 .desired_access = FILE_WRITE_EA,
1127                 .disposition = FILE_OPEN,
1128                 .create_options = cifs_create_options(cifs_sb, 0),
1129                 .fid = &fid,
1130         };
1131
1132         rc = SMB2_open_init(tcon, server,
1133                             &rqst[0], &oplock, &oparms, utf16_path);
1134         if (rc)
1135                 goto sea_exit;
1136         smb2_set_next_command(tcon, &rqst[0]);
1137
1138
1139         /* Set Info */
1140         memset(&si_iov, 0, sizeof(si_iov));
1141         rqst[1].rq_iov = si_iov;
1142         rqst[1].rq_nvec = 1;
1143
1144         len = sizeof(*ea) + ea_name_len + ea_value_len + 1;
1145         ea = kzalloc(len, GFP_KERNEL);
1146         if (ea == NULL) {
1147                 rc = -ENOMEM;
1148                 goto sea_exit;
1149         }
1150
1151         ea->ea_name_length = ea_name_len;
1152         ea->ea_value_length = cpu_to_le16(ea_value_len);
1153         memcpy(ea->ea_data, ea_name, ea_name_len + 1);
1154         memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len);
1155
1156         size[0] = len;
1157         data[0] = ea;
1158
1159         rc = SMB2_set_info_init(tcon, server,
1160                                 &rqst[1], COMPOUND_FID,
1161                                 COMPOUND_FID, current->tgid,
1162                                 FILE_FULL_EA_INFORMATION,
1163                                 SMB2_O_INFO_FILE, 0, data, size);
1164         if (rc)
1165                 goto sea_exit;
1166         smb2_set_next_command(tcon, &rqst[1]);
1167         smb2_set_related(&rqst[1]);
1168
1169
1170         /* Close */
1171         memset(&close_iov, 0, sizeof(close_iov));
1172         rqst[2].rq_iov = close_iov;
1173         rqst[2].rq_nvec = 1;
1174         rc = SMB2_close_init(tcon, server,
1175                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
1176         if (rc)
1177                 goto sea_exit;
1178         smb2_set_related(&rqst[2]);
1179
1180         rc = compound_send_recv(xid, ses, server,
1181                                 flags, 3, rqst,
1182                                 resp_buftype, rsp_iov);
1183         /* no need to bump num_remote_opens because handle immediately closed */
1184
1185  sea_exit:
1186         kfree(ea);
1187         kfree(utf16_path);
1188         SMB2_open_free(&rqst[0]);
1189         SMB2_set_info_free(&rqst[1]);
1190         SMB2_close_free(&rqst[2]);
1191         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1192         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1193         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1194         return rc;
1195 }
1196 #endif
1197
1198 static bool
1199 smb2_can_echo(struct TCP_Server_Info *server)
1200 {
1201         return server->echoes;
1202 }
1203
1204 static void
1205 smb2_clear_stats(struct cifs_tcon *tcon)
1206 {
1207         int i;
1208
1209         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
1210                 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
1211                 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
1212         }
1213 }
1214
1215 static void
1216 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
1217 {
1218         seq_puts(m, "\n\tShare Capabilities:");
1219         if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
1220                 seq_puts(m, " DFS,");
1221         if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
1222                 seq_puts(m, " CONTINUOUS AVAILABILITY,");
1223         if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
1224                 seq_puts(m, " SCALEOUT,");
1225         if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
1226                 seq_puts(m, " CLUSTER,");
1227         if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
1228                 seq_puts(m, " ASYMMETRIC,");
1229         if (tcon->capabilities == 0)
1230                 seq_puts(m, " None");
1231         if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
1232                 seq_puts(m, " Aligned,");
1233         if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
1234                 seq_puts(m, " Partition Aligned,");
1235         if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
1236                 seq_puts(m, " SSD,");
1237         if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
1238                 seq_puts(m, " TRIM-support,");
1239
1240         seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
1241         seq_printf(m, "\n\ttid: 0x%x", tcon->tid);
1242         if (tcon->perf_sector_size)
1243                 seq_printf(m, "\tOptimal sector size: 0x%x",
1244                            tcon->perf_sector_size);
1245         seq_printf(m, "\tMaximal Access: 0x%x", tcon->maximal_access);
1246 }
1247
1248 static void
1249 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
1250 {
1251         atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
1252         atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
1253
1254         /*
1255          *  Can't display SMB2_NEGOTIATE, SESSION_SETUP, LOGOFF, CANCEL and ECHO
1256          *  totals (requests sent) since those SMBs are per-session not per tcon
1257          */
1258         seq_printf(m, "\nBytes read: %llu  Bytes written: %llu",
1259                    (long long)(tcon->bytes_read),
1260                    (long long)(tcon->bytes_written));
1261         seq_printf(m, "\nOpen files: %d total (local), %d open on server",
1262                    atomic_read(&tcon->num_local_opens),
1263                    atomic_read(&tcon->num_remote_opens));
1264         seq_printf(m, "\nTreeConnects: %d total %d failed",
1265                    atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
1266                    atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
1267         seq_printf(m, "\nTreeDisconnects: %d total %d failed",
1268                    atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
1269                    atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
1270         seq_printf(m, "\nCreates: %d total %d failed",
1271                    atomic_read(&sent[SMB2_CREATE_HE]),
1272                    atomic_read(&failed[SMB2_CREATE_HE]));
1273         seq_printf(m, "\nCloses: %d total %d failed",
1274                    atomic_read(&sent[SMB2_CLOSE_HE]),
1275                    atomic_read(&failed[SMB2_CLOSE_HE]));
1276         seq_printf(m, "\nFlushes: %d total %d failed",
1277                    atomic_read(&sent[SMB2_FLUSH_HE]),
1278                    atomic_read(&failed[SMB2_FLUSH_HE]));
1279         seq_printf(m, "\nReads: %d total %d failed",
1280                    atomic_read(&sent[SMB2_READ_HE]),
1281                    atomic_read(&failed[SMB2_READ_HE]));
1282         seq_printf(m, "\nWrites: %d total %d failed",
1283                    atomic_read(&sent[SMB2_WRITE_HE]),
1284                    atomic_read(&failed[SMB2_WRITE_HE]));
1285         seq_printf(m, "\nLocks: %d total %d failed",
1286                    atomic_read(&sent[SMB2_LOCK_HE]),
1287                    atomic_read(&failed[SMB2_LOCK_HE]));
1288         seq_printf(m, "\nIOCTLs: %d total %d failed",
1289                    atomic_read(&sent[SMB2_IOCTL_HE]),
1290                    atomic_read(&failed[SMB2_IOCTL_HE]));
1291         seq_printf(m, "\nQueryDirectories: %d total %d failed",
1292                    atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
1293                    atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
1294         seq_printf(m, "\nChangeNotifies: %d total %d failed",
1295                    atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
1296                    atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
1297         seq_printf(m, "\nQueryInfos: %d total %d failed",
1298                    atomic_read(&sent[SMB2_QUERY_INFO_HE]),
1299                    atomic_read(&failed[SMB2_QUERY_INFO_HE]));
1300         seq_printf(m, "\nSetInfos: %d total %d failed",
1301                    atomic_read(&sent[SMB2_SET_INFO_HE]),
1302                    atomic_read(&failed[SMB2_SET_INFO_HE]));
1303         seq_printf(m, "\nOplockBreaks: %d sent %d failed",
1304                    atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
1305                    atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
1306 }
1307
1308 static void
1309 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
1310 {
1311         struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
1312         struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
1313
1314         cfile->fid.persistent_fid = fid->persistent_fid;
1315         cfile->fid.volatile_fid = fid->volatile_fid;
1316         cfile->fid.access = fid->access;
1317 #ifdef CONFIG_CIFS_DEBUG2
1318         cfile->fid.mid = fid->mid;
1319 #endif /* CIFS_DEBUG2 */
1320         server->ops->set_oplock_level(cinode, oplock, fid->epoch,
1321                                       &fid->purge_cache);
1322         cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
1323         memcpy(cfile->fid.create_guid, fid->create_guid, 16);
1324 }
1325
1326 static void
1327 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
1328                 struct cifs_fid *fid)
1329 {
1330         SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1331 }
1332
1333 static void
1334 smb2_close_getattr(const unsigned int xid, struct cifs_tcon *tcon,
1335                    struct cifsFileInfo *cfile)
1336 {
1337         struct smb2_file_network_open_info file_inf;
1338         struct inode *inode;
1339         int rc;
1340
1341         rc = __SMB2_close(xid, tcon, cfile->fid.persistent_fid,
1342                    cfile->fid.volatile_fid, &file_inf);
1343         if (rc)
1344                 return;
1345
1346         inode = d_inode(cfile->dentry);
1347
1348         spin_lock(&inode->i_lock);
1349         CIFS_I(inode)->time = jiffies;
1350
1351         /* Creation time should not need to be updated on close */
1352         if (file_inf.LastWriteTime)
1353                 inode->i_mtime = cifs_NTtimeToUnix(file_inf.LastWriteTime);
1354         if (file_inf.ChangeTime)
1355                 inode->i_ctime = cifs_NTtimeToUnix(file_inf.ChangeTime);
1356         if (file_inf.LastAccessTime)
1357                 inode->i_atime = cifs_NTtimeToUnix(file_inf.LastAccessTime);
1358
1359         /*
1360          * i_blocks is not related to (i_size / i_blksize),
1361          * but instead 512 byte (2**9) size is required for
1362          * calculating num blocks.
1363          */
1364         if (le64_to_cpu(file_inf.AllocationSize) > 4096)
1365                 inode->i_blocks =
1366                         (512 - 1 + le64_to_cpu(file_inf.AllocationSize)) >> 9;
1367
1368         /* End of file and Attributes should not have to be updated on close */
1369         spin_unlock(&inode->i_lock);
1370 }
1371
1372 static int
1373 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
1374                      u64 persistent_fid, u64 volatile_fid,
1375                      struct copychunk_ioctl *pcchunk)
1376 {
1377         int rc;
1378         unsigned int ret_data_len;
1379         struct resume_key_req *res_key;
1380
1381         rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
1382                         FSCTL_SRV_REQUEST_RESUME_KEY, NULL, 0 /* no input */,
1383                         CIFSMaxBufSize, (char **)&res_key, &ret_data_len);
1384
1385         if (rc == -EOPNOTSUPP) {
1386                 pr_warn_once("Server share %s does not support copy range\n", tcon->tree_name);
1387                 goto req_res_key_exit;
1388         } else if (rc) {
1389                 cifs_tcon_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
1390                 goto req_res_key_exit;
1391         }
1392         if (ret_data_len < sizeof(struct resume_key_req)) {
1393                 cifs_tcon_dbg(VFS, "Invalid refcopy resume key length\n");
1394                 rc = -EINVAL;
1395                 goto req_res_key_exit;
1396         }
1397         memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
1398
1399 req_res_key_exit:
1400         kfree(res_key);
1401         return rc;
1402 }
1403
1404 struct iqi_vars {
1405         struct smb_rqst rqst[3];
1406         struct kvec rsp_iov[3];
1407         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
1408         struct kvec qi_iov[1];
1409         struct kvec io_iov[SMB2_IOCTL_IOV_SIZE];
1410         struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE];
1411         struct kvec close_iov[1];
1412 };
1413
1414 static int
1415 smb2_ioctl_query_info(const unsigned int xid,
1416                       struct cifs_tcon *tcon,
1417                       struct cifs_sb_info *cifs_sb,
1418                       __le16 *path, int is_dir,
1419                       unsigned long p)
1420 {
1421         struct iqi_vars *vars;
1422         struct smb_rqst *rqst;
1423         struct kvec *rsp_iov;
1424         struct cifs_ses *ses = tcon->ses;
1425         struct TCP_Server_Info *server = cifs_pick_channel(ses);
1426         char __user *arg = (char __user *)p;
1427         struct smb_query_info qi;
1428         struct smb_query_info __user *pqi;
1429         int rc = 0;
1430         int flags = CIFS_CP_CREATE_CLOSE_OP;
1431         struct smb2_query_info_rsp *qi_rsp = NULL;
1432         struct smb2_ioctl_rsp *io_rsp = NULL;
1433         void *buffer = NULL;
1434         int resp_buftype[3];
1435         struct cifs_open_parms oparms;
1436         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1437         struct cifs_fid fid;
1438         unsigned int size[2];
1439         void *data[2];
1440         int create_options = is_dir ? CREATE_NOT_FILE : CREATE_NOT_DIR;
1441         void (*free_req1_func)(struct smb_rqst *r);
1442
1443         vars = kzalloc(sizeof(*vars), GFP_ATOMIC);
1444         if (vars == NULL)
1445                 return -ENOMEM;
1446         rqst = &vars->rqst[0];
1447         rsp_iov = &vars->rsp_iov[0];
1448
1449         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1450
1451         if (copy_from_user(&qi, arg, sizeof(struct smb_query_info))) {
1452                 rc = -EFAULT;
1453                 goto free_vars;
1454         }
1455         if (qi.output_buffer_length > 1024) {
1456                 rc = -EINVAL;
1457                 goto free_vars;
1458         }
1459
1460         if (!ses || !server) {
1461                 rc = -EIO;
1462                 goto free_vars;
1463         }
1464
1465         if (smb3_encryption_required(tcon))
1466                 flags |= CIFS_TRANSFORM_REQ;
1467
1468         if (qi.output_buffer_length) {
1469                 buffer = memdup_user(arg + sizeof(struct smb_query_info), qi.output_buffer_length);
1470                 if (IS_ERR(buffer)) {
1471                         rc = PTR_ERR(buffer);
1472                         goto free_vars;
1473                 }
1474         }
1475
1476         /* Open */
1477         rqst[0].rq_iov = &vars->open_iov[0];
1478         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1479
1480         oparms = (struct cifs_open_parms) {
1481                 .tcon = tcon,
1482                 .disposition = FILE_OPEN,
1483                 .create_options = cifs_create_options(cifs_sb, create_options),
1484                 .fid = &fid,
1485         };
1486
1487         if (qi.flags & PASSTHRU_FSCTL) {
1488                 switch (qi.info_type & FSCTL_DEVICE_ACCESS_MASK) {
1489                 case FSCTL_DEVICE_ACCESS_FILE_READ_WRITE_ACCESS:
1490                         oparms.desired_access = FILE_READ_DATA | FILE_WRITE_DATA | FILE_READ_ATTRIBUTES | SYNCHRONIZE;
1491                         break;
1492                 case FSCTL_DEVICE_ACCESS_FILE_ANY_ACCESS:
1493                         oparms.desired_access = GENERIC_ALL;
1494                         break;
1495                 case FSCTL_DEVICE_ACCESS_FILE_READ_ACCESS:
1496                         oparms.desired_access = GENERIC_READ;
1497                         break;
1498                 case FSCTL_DEVICE_ACCESS_FILE_WRITE_ACCESS:
1499                         oparms.desired_access = GENERIC_WRITE;
1500                         break;
1501                 }
1502         } else if (qi.flags & PASSTHRU_SET_INFO) {
1503                 oparms.desired_access = GENERIC_WRITE;
1504         } else {
1505                 oparms.desired_access = FILE_READ_ATTRIBUTES | READ_CONTROL;
1506         }
1507
1508         rc = SMB2_open_init(tcon, server,
1509                             &rqst[0], &oplock, &oparms, path);
1510         if (rc)
1511                 goto free_output_buffer;
1512         smb2_set_next_command(tcon, &rqst[0]);
1513
1514         /* Query */
1515         if (qi.flags & PASSTHRU_FSCTL) {
1516                 /* Can eventually relax perm check since server enforces too */
1517                 if (!capable(CAP_SYS_ADMIN)) {
1518                         rc = -EPERM;
1519                         goto free_open_req;
1520                 }
1521                 rqst[1].rq_iov = &vars->io_iov[0];
1522                 rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
1523
1524                 rc = SMB2_ioctl_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID,
1525                                      qi.info_type, buffer, qi.output_buffer_length,
1526                                      CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE -
1527                                      MAX_SMB2_CLOSE_RESPONSE_SIZE);
1528                 free_req1_func = SMB2_ioctl_free;
1529         } else if (qi.flags == PASSTHRU_SET_INFO) {
1530                 /* Can eventually relax perm check since server enforces too */
1531                 if (!capable(CAP_SYS_ADMIN)) {
1532                         rc = -EPERM;
1533                         goto free_open_req;
1534                 }
1535                 if (qi.output_buffer_length < 8) {
1536                         rc = -EINVAL;
1537                         goto free_open_req;
1538                 }
1539                 rqst[1].rq_iov = &vars->si_iov[0];
1540                 rqst[1].rq_nvec = 1;
1541
1542                 /* MS-FSCC 2.4.13 FileEndOfFileInformation */
1543                 size[0] = 8;
1544                 data[0] = buffer;
1545
1546                 rc = SMB2_set_info_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID,
1547                                         current->tgid, FILE_END_OF_FILE_INFORMATION,
1548                                         SMB2_O_INFO_FILE, 0, data, size);
1549                 free_req1_func = SMB2_set_info_free;
1550         } else if (qi.flags == PASSTHRU_QUERY_INFO) {
1551                 rqst[1].rq_iov = &vars->qi_iov[0];
1552                 rqst[1].rq_nvec = 1;
1553
1554                 rc = SMB2_query_info_init(tcon, server,
1555                                   &rqst[1], COMPOUND_FID,
1556                                   COMPOUND_FID, qi.file_info_class,
1557                                   qi.info_type, qi.additional_information,
1558                                   qi.input_buffer_length,
1559                                   qi.output_buffer_length, buffer);
1560                 free_req1_func = SMB2_query_info_free;
1561         } else { /* unknown flags */
1562                 cifs_tcon_dbg(VFS, "Invalid passthru query flags: 0x%x\n",
1563                               qi.flags);
1564                 rc = -EINVAL;
1565         }
1566
1567         if (rc)
1568                 goto free_open_req;
1569         smb2_set_next_command(tcon, &rqst[1]);
1570         smb2_set_related(&rqst[1]);
1571
1572         /* Close */
1573         rqst[2].rq_iov = &vars->close_iov[0];
1574         rqst[2].rq_nvec = 1;
1575
1576         rc = SMB2_close_init(tcon, server,
1577                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
1578         if (rc)
1579                 goto free_req_1;
1580         smb2_set_related(&rqst[2]);
1581
1582         rc = compound_send_recv(xid, ses, server,
1583                                 flags, 3, rqst,
1584                                 resp_buftype, rsp_iov);
1585         if (rc)
1586                 goto out;
1587
1588         /* No need to bump num_remote_opens since handle immediately closed */
1589         if (qi.flags & PASSTHRU_FSCTL) {
1590                 pqi = (struct smb_query_info __user *)arg;
1591                 io_rsp = (struct smb2_ioctl_rsp *)rsp_iov[1].iov_base;
1592                 if (le32_to_cpu(io_rsp->OutputCount) < qi.input_buffer_length)
1593                         qi.input_buffer_length = le32_to_cpu(io_rsp->OutputCount);
1594                 if (qi.input_buffer_length > 0 &&
1595                     le32_to_cpu(io_rsp->OutputOffset) + qi.input_buffer_length
1596                     > rsp_iov[1].iov_len) {
1597                         rc = -EFAULT;
1598                         goto out;
1599                 }
1600
1601                 if (copy_to_user(&pqi->input_buffer_length,
1602                                  &qi.input_buffer_length,
1603                                  sizeof(qi.input_buffer_length))) {
1604                         rc = -EFAULT;
1605                         goto out;
1606                 }
1607
1608                 if (copy_to_user((void __user *)pqi + sizeof(struct smb_query_info),
1609                                  (const void *)io_rsp + le32_to_cpu(io_rsp->OutputOffset),
1610                                  qi.input_buffer_length))
1611                         rc = -EFAULT;
1612         } else {
1613                 pqi = (struct smb_query_info __user *)arg;
1614                 qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1615                 if (le32_to_cpu(qi_rsp->OutputBufferLength) < qi.input_buffer_length)
1616                         qi.input_buffer_length = le32_to_cpu(qi_rsp->OutputBufferLength);
1617                 if (copy_to_user(&pqi->input_buffer_length,
1618                                  &qi.input_buffer_length,
1619                                  sizeof(qi.input_buffer_length))) {
1620                         rc = -EFAULT;
1621                         goto out;
1622                 }
1623
1624                 if (copy_to_user(pqi + 1, qi_rsp->Buffer,
1625                                  qi.input_buffer_length))
1626                         rc = -EFAULT;
1627         }
1628
1629 out:
1630         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1631         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1632         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1633         SMB2_close_free(&rqst[2]);
1634 free_req_1:
1635         free_req1_func(&rqst[1]);
1636 free_open_req:
1637         SMB2_open_free(&rqst[0]);
1638 free_output_buffer:
1639         kfree(buffer);
1640 free_vars:
1641         kfree(vars);
1642         return rc;
1643 }
1644
1645 static ssize_t
1646 smb2_copychunk_range(const unsigned int xid,
1647                         struct cifsFileInfo *srcfile,
1648                         struct cifsFileInfo *trgtfile, u64 src_off,
1649                         u64 len, u64 dest_off)
1650 {
1651         int rc;
1652         unsigned int ret_data_len;
1653         struct copychunk_ioctl *pcchunk;
1654         struct copychunk_ioctl_rsp *retbuf = NULL;
1655         struct cifs_tcon *tcon;
1656         int chunks_copied = 0;
1657         bool chunk_sizes_updated = false;
1658         ssize_t bytes_written, total_bytes_written = 0;
1659
1660         pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
1661         if (pcchunk == NULL)
1662                 return -ENOMEM;
1663
1664         cifs_dbg(FYI, "%s: about to call request res key\n", __func__);
1665         /* Request a key from the server to identify the source of the copy */
1666         rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
1667                                 srcfile->fid.persistent_fid,
1668                                 srcfile->fid.volatile_fid, pcchunk);
1669
1670         /* Note: request_res_key sets res_key null only if rc !=0 */
1671         if (rc)
1672                 goto cchunk_out;
1673
1674         /* For now array only one chunk long, will make more flexible later */
1675         pcchunk->ChunkCount = cpu_to_le32(1);
1676         pcchunk->Reserved = 0;
1677         pcchunk->Reserved2 = 0;
1678
1679         tcon = tlink_tcon(trgtfile->tlink);
1680
1681         while (len > 0) {
1682                 pcchunk->SourceOffset = cpu_to_le64(src_off);
1683                 pcchunk->TargetOffset = cpu_to_le64(dest_off);
1684                 pcchunk->Length =
1685                         cpu_to_le32(min_t(u64, len, tcon->max_bytes_chunk));
1686
1687                 /* Request server copy to target from src identified by key */
1688                 kfree(retbuf);
1689                 retbuf = NULL;
1690                 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1691                         trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
1692                         (char *)pcchunk, sizeof(struct copychunk_ioctl),
1693                         CIFSMaxBufSize, (char **)&retbuf, &ret_data_len);
1694                 if (rc == 0) {
1695                         if (ret_data_len !=
1696                                         sizeof(struct copychunk_ioctl_rsp)) {
1697                                 cifs_tcon_dbg(VFS, "Invalid cchunk response size\n");
1698                                 rc = -EIO;
1699                                 goto cchunk_out;
1700                         }
1701                         if (retbuf->TotalBytesWritten == 0) {
1702                                 cifs_dbg(FYI, "no bytes copied\n");
1703                                 rc = -EIO;
1704                                 goto cchunk_out;
1705                         }
1706                         /*
1707                          * Check if server claimed to write more than we asked
1708                          */
1709                         if (le32_to_cpu(retbuf->TotalBytesWritten) >
1710                             le32_to_cpu(pcchunk->Length)) {
1711                                 cifs_tcon_dbg(VFS, "Invalid copy chunk response\n");
1712                                 rc = -EIO;
1713                                 goto cchunk_out;
1714                         }
1715                         if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
1716                                 cifs_tcon_dbg(VFS, "Invalid num chunks written\n");
1717                                 rc = -EIO;
1718                                 goto cchunk_out;
1719                         }
1720                         chunks_copied++;
1721
1722                         bytes_written = le32_to_cpu(retbuf->TotalBytesWritten);
1723                         src_off += bytes_written;
1724                         dest_off += bytes_written;
1725                         len -= bytes_written;
1726                         total_bytes_written += bytes_written;
1727
1728                         cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n",
1729                                 le32_to_cpu(retbuf->ChunksWritten),
1730                                 le32_to_cpu(retbuf->ChunkBytesWritten),
1731                                 bytes_written);
1732                 } else if (rc == -EINVAL) {
1733                         if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
1734                                 goto cchunk_out;
1735
1736                         cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
1737                                 le32_to_cpu(retbuf->ChunksWritten),
1738                                 le32_to_cpu(retbuf->ChunkBytesWritten),
1739                                 le32_to_cpu(retbuf->TotalBytesWritten));
1740
1741                         /*
1742                          * Check if this is the first request using these sizes,
1743                          * (ie check if copy succeed once with original sizes
1744                          * and check if the server gave us different sizes after
1745                          * we already updated max sizes on previous request).
1746                          * if not then why is the server returning an error now
1747                          */
1748                         if ((chunks_copied != 0) || chunk_sizes_updated)
1749                                 goto cchunk_out;
1750
1751                         /* Check that server is not asking us to grow size */
1752                         if (le32_to_cpu(retbuf->ChunkBytesWritten) <
1753                                         tcon->max_bytes_chunk)
1754                                 tcon->max_bytes_chunk =
1755                                         le32_to_cpu(retbuf->ChunkBytesWritten);
1756                         else
1757                                 goto cchunk_out; /* server gave us bogus size */
1758
1759                         /* No need to change MaxChunks since already set to 1 */
1760                         chunk_sizes_updated = true;
1761                 } else
1762                         goto cchunk_out;
1763         }
1764
1765 cchunk_out:
1766         kfree(pcchunk);
1767         kfree(retbuf);
1768         if (rc)
1769                 return rc;
1770         else
1771                 return total_bytes_written;
1772 }
1773
1774 static int
1775 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
1776                 struct cifs_fid *fid)
1777 {
1778         return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1779 }
1780
1781 static unsigned int
1782 smb2_read_data_offset(char *buf)
1783 {
1784         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1785
1786         return rsp->DataOffset;
1787 }
1788
1789 static unsigned int
1790 smb2_read_data_length(char *buf, bool in_remaining)
1791 {
1792         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1793
1794         if (in_remaining)
1795                 return le32_to_cpu(rsp->DataRemaining);
1796
1797         return le32_to_cpu(rsp->DataLength);
1798 }
1799
1800
1801 static int
1802 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
1803                struct cifs_io_parms *parms, unsigned int *bytes_read,
1804                char **buf, int *buf_type)
1805 {
1806         parms->persistent_fid = pfid->persistent_fid;
1807         parms->volatile_fid = pfid->volatile_fid;
1808         return SMB2_read(xid, parms, bytes_read, buf, buf_type);
1809 }
1810
1811 static int
1812 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
1813                 struct cifs_io_parms *parms, unsigned int *written,
1814                 struct kvec *iov, unsigned long nr_segs)
1815 {
1816
1817         parms->persistent_fid = pfid->persistent_fid;
1818         parms->volatile_fid = pfid->volatile_fid;
1819         return SMB2_write(xid, parms, written, iov, nr_segs);
1820 }
1821
1822 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
1823 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
1824                 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
1825 {
1826         struct cifsInodeInfo *cifsi;
1827         int rc;
1828
1829         cifsi = CIFS_I(inode);
1830
1831         /* if file already sparse don't bother setting sparse again */
1832         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
1833                 return true; /* already sparse */
1834
1835         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
1836                 return true; /* already not sparse */
1837
1838         /*
1839          * Can't check for sparse support on share the usual way via the
1840          * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
1841          * since Samba server doesn't set the flag on the share, yet
1842          * supports the set sparse FSCTL and returns sparse correctly
1843          * in the file attributes. If we fail setting sparse though we
1844          * mark that server does not support sparse files for this share
1845          * to avoid repeatedly sending the unsupported fsctl to server
1846          * if the file is repeatedly extended.
1847          */
1848         if (tcon->broken_sparse_sup)
1849                 return false;
1850
1851         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1852                         cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
1853                         &setsparse, 1, CIFSMaxBufSize, NULL, NULL);
1854         if (rc) {
1855                 tcon->broken_sparse_sup = true;
1856                 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
1857                 return false;
1858         }
1859
1860         if (setsparse)
1861                 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
1862         else
1863                 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
1864
1865         return true;
1866 }
1867
1868 static int
1869 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
1870                    struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
1871 {
1872         __le64 eof = cpu_to_le64(size);
1873         struct inode *inode;
1874
1875         /*
1876          * If extending file more than one page make sparse. Many Linux fs
1877          * make files sparse by default when extending via ftruncate
1878          */
1879         inode = d_inode(cfile->dentry);
1880
1881         if (!set_alloc && (size > inode->i_size + 8192)) {
1882                 __u8 set_sparse = 1;
1883
1884                 /* whether set sparse succeeds or not, extend the file */
1885                 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
1886         }
1887
1888         return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
1889                             cfile->fid.volatile_fid, cfile->pid, &eof);
1890 }
1891
1892 static int
1893 smb2_duplicate_extents(const unsigned int xid,
1894                         struct cifsFileInfo *srcfile,
1895                         struct cifsFileInfo *trgtfile, u64 src_off,
1896                         u64 len, u64 dest_off)
1897 {
1898         int rc;
1899         unsigned int ret_data_len;
1900         struct inode *inode;
1901         struct duplicate_extents_to_file dup_ext_buf;
1902         struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
1903
1904         /* server fileays advertise duplicate extent support with this flag */
1905         if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
1906              FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
1907                 return -EOPNOTSUPP;
1908
1909         dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
1910         dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
1911         dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
1912         dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
1913         dup_ext_buf.ByteCount = cpu_to_le64(len);
1914         cifs_dbg(FYI, "Duplicate extents: src off %lld dst off %lld len %lld\n",
1915                 src_off, dest_off, len);
1916
1917         inode = d_inode(trgtfile->dentry);
1918         if (inode->i_size < dest_off + len) {
1919                 rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
1920                 if (rc)
1921                         goto duplicate_extents_out;
1922
1923                 /*
1924                  * Although also could set plausible allocation size (i_blocks)
1925                  * here in addition to setting the file size, in reflink
1926                  * it is likely that the target file is sparse. Its allocation
1927                  * size will be queried on next revalidate, but it is important
1928                  * to make sure that file's cached size is updated immediately
1929                  */
1930                 cifs_setsize(inode, dest_off + len);
1931         }
1932         rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1933                         trgtfile->fid.volatile_fid,
1934                         FSCTL_DUPLICATE_EXTENTS_TO_FILE,
1935                         (char *)&dup_ext_buf,
1936                         sizeof(struct duplicate_extents_to_file),
1937                         CIFSMaxBufSize, NULL,
1938                         &ret_data_len);
1939
1940         if (ret_data_len > 0)
1941                 cifs_dbg(FYI, "Non-zero response length in duplicate extents\n");
1942
1943 duplicate_extents_out:
1944         return rc;
1945 }
1946
1947 static int
1948 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
1949                    struct cifsFileInfo *cfile)
1950 {
1951         return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
1952                             cfile->fid.volatile_fid);
1953 }
1954
1955 static int
1956 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
1957                    struct cifsFileInfo *cfile)
1958 {
1959         struct fsctl_set_integrity_information_req integr_info;
1960         unsigned int ret_data_len;
1961
1962         integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
1963         integr_info.Flags = 0;
1964         integr_info.Reserved = 0;
1965
1966         return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1967                         cfile->fid.volatile_fid,
1968                         FSCTL_SET_INTEGRITY_INFORMATION,
1969                         (char *)&integr_info,
1970                         sizeof(struct fsctl_set_integrity_information_req),
1971                         CIFSMaxBufSize, NULL,
1972                         &ret_data_len);
1973
1974 }
1975
1976 /* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */
1977 #define GMT_TOKEN_SIZE 50
1978
1979 #define MIN_SNAPSHOT_ARRAY_SIZE 16 /* See MS-SMB2 section 3.3.5.15.1 */
1980
1981 /*
1982  * Input buffer contains (empty) struct smb_snapshot array with size filled in
1983  * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2
1984  */
1985 static int
1986 smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
1987                    struct cifsFileInfo *cfile, void __user *ioc_buf)
1988 {
1989         char *retbuf = NULL;
1990         unsigned int ret_data_len = 0;
1991         int rc;
1992         u32 max_response_size;
1993         struct smb_snapshot_array snapshot_in;
1994
1995         /*
1996          * On the first query to enumerate the list of snapshots available
1997          * for this volume the buffer begins with 0 (number of snapshots
1998          * which can be returned is zero since at that point we do not know
1999          * how big the buffer needs to be). On the second query,
2000          * it (ret_data_len) is set to number of snapshots so we can
2001          * know to set the maximum response size larger (see below).
2002          */
2003         if (get_user(ret_data_len, (unsigned int __user *)ioc_buf))
2004                 return -EFAULT;
2005
2006         /*
2007          * Note that for snapshot queries that servers like Azure expect that
2008          * the first query be minimal size (and just used to get the number/size
2009          * of previous versions) so response size must be specified as EXACTLY
2010          * sizeof(struct snapshot_array) which is 16 when rounded up to multiple
2011          * of eight bytes.
2012          */
2013         if (ret_data_len == 0)
2014                 max_response_size = MIN_SNAPSHOT_ARRAY_SIZE;
2015         else
2016                 max_response_size = CIFSMaxBufSize;
2017
2018         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2019                         cfile->fid.volatile_fid,
2020                         FSCTL_SRV_ENUMERATE_SNAPSHOTS,
2021                         NULL, 0 /* no input data */, max_response_size,
2022                         (char **)&retbuf,
2023                         &ret_data_len);
2024         cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n",
2025                         rc, ret_data_len);
2026         if (rc)
2027                 return rc;
2028
2029         if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) {
2030                 /* Fixup buffer */
2031                 if (copy_from_user(&snapshot_in, ioc_buf,
2032                     sizeof(struct smb_snapshot_array))) {
2033                         rc = -EFAULT;
2034                         kfree(retbuf);
2035                         return rc;
2036                 }
2037
2038                 /*
2039                  * Check for min size, ie not large enough to fit even one GMT
2040                  * token (snapshot).  On the first ioctl some users may pass in
2041                  * smaller size (or zero) to simply get the size of the array
2042                  * so the user space caller can allocate sufficient memory
2043                  * and retry the ioctl again with larger array size sufficient
2044                  * to hold all of the snapshot GMT tokens on the second try.
2045                  */
2046                 if (snapshot_in.snapshot_array_size < GMT_TOKEN_SIZE)
2047                         ret_data_len = sizeof(struct smb_snapshot_array);
2048
2049                 /*
2050                  * We return struct SRV_SNAPSHOT_ARRAY, followed by
2051                  * the snapshot array (of 50 byte GMT tokens) each
2052                  * representing an available previous version of the data
2053                  */
2054                 if (ret_data_len > (snapshot_in.snapshot_array_size +
2055                                         sizeof(struct smb_snapshot_array)))
2056                         ret_data_len = snapshot_in.snapshot_array_size +
2057                                         sizeof(struct smb_snapshot_array);
2058
2059                 if (copy_to_user(ioc_buf, retbuf, ret_data_len))
2060                         rc = -EFAULT;
2061         }
2062
2063         kfree(retbuf);
2064         return rc;
2065 }
2066
2067
2068
2069 static int
2070 smb3_notify(const unsigned int xid, struct file *pfile,
2071             void __user *ioc_buf, bool return_changes)
2072 {
2073         struct smb3_notify_info notify;
2074         struct smb3_notify_info __user *pnotify_buf;
2075         struct dentry *dentry = pfile->f_path.dentry;
2076         struct inode *inode = file_inode(pfile);
2077         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2078         struct cifs_open_parms oparms;
2079         struct cifs_fid fid;
2080         struct cifs_tcon *tcon;
2081         const unsigned char *path;
2082         char *returned_ioctl_info = NULL;
2083         void *page = alloc_dentry_path();
2084         __le16 *utf16_path = NULL;
2085         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2086         int rc = 0;
2087         __u32 ret_len = 0;
2088
2089         path = build_path_from_dentry(dentry, page);
2090         if (IS_ERR(path)) {
2091                 rc = PTR_ERR(path);
2092                 goto notify_exit;
2093         }
2094
2095         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2096         if (utf16_path == NULL) {
2097                 rc = -ENOMEM;
2098                 goto notify_exit;
2099         }
2100
2101         if (return_changes) {
2102                 if (copy_from_user(&notify, ioc_buf, sizeof(struct smb3_notify_info))) {
2103                         rc = -EFAULT;
2104                         goto notify_exit;
2105                 }
2106         } else {
2107                 if (copy_from_user(&notify, ioc_buf, sizeof(struct smb3_notify))) {
2108                         rc = -EFAULT;
2109                         goto notify_exit;
2110                 }
2111                 notify.data_len = 0;
2112         }
2113
2114         tcon = cifs_sb_master_tcon(cifs_sb);
2115         oparms = (struct cifs_open_parms) {
2116                 .tcon = tcon,
2117                 .path = path,
2118                 .desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA,
2119                 .disposition = FILE_OPEN,
2120                 .create_options = cifs_create_options(cifs_sb, 0),
2121                 .fid = &fid,
2122         };
2123
2124         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
2125                        NULL);
2126         if (rc)
2127                 goto notify_exit;
2128
2129         rc = SMB2_change_notify(xid, tcon, fid.persistent_fid, fid.volatile_fid,
2130                                 notify.watch_tree, notify.completion_filter,
2131                                 notify.data_len, &returned_ioctl_info, &ret_len);
2132
2133         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2134
2135         cifs_dbg(FYI, "change notify for path %s rc %d\n", path, rc);
2136         if (return_changes && (ret_len > 0) && (notify.data_len > 0)) {
2137                 if (ret_len > notify.data_len)
2138                         ret_len = notify.data_len;
2139                 pnotify_buf = (struct smb3_notify_info __user *)ioc_buf;
2140                 if (copy_to_user(pnotify_buf->notify_data, returned_ioctl_info, ret_len))
2141                         rc = -EFAULT;
2142                 else if (copy_to_user(&pnotify_buf->data_len, &ret_len, sizeof(ret_len)))
2143                         rc = -EFAULT;
2144         }
2145         kfree(returned_ioctl_info);
2146 notify_exit:
2147         free_dentry_path(page);
2148         kfree(utf16_path);
2149         return rc;
2150 }
2151
2152 static int
2153 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
2154                      const char *path, struct cifs_sb_info *cifs_sb,
2155                      struct cifs_fid *fid, __u16 search_flags,
2156                      struct cifs_search_info *srch_inf)
2157 {
2158         __le16 *utf16_path;
2159         struct smb_rqst rqst[2];
2160         struct kvec rsp_iov[2];
2161         int resp_buftype[2];
2162         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2163         struct kvec qd_iov[SMB2_QUERY_DIRECTORY_IOV_SIZE];
2164         int rc, flags = 0;
2165         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2166         struct cifs_open_parms oparms;
2167         struct smb2_query_directory_rsp *qd_rsp = NULL;
2168         struct smb2_create_rsp *op_rsp = NULL;
2169         struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
2170         int retry_count = 0;
2171
2172         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2173         if (!utf16_path)
2174                 return -ENOMEM;
2175
2176         if (smb3_encryption_required(tcon))
2177                 flags |= CIFS_TRANSFORM_REQ;
2178
2179         memset(rqst, 0, sizeof(rqst));
2180         resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER;
2181         memset(rsp_iov, 0, sizeof(rsp_iov));
2182
2183         /* Open */
2184         memset(&open_iov, 0, sizeof(open_iov));
2185         rqst[0].rq_iov = open_iov;
2186         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2187
2188         oparms = (struct cifs_open_parms) {
2189                 .tcon = tcon,
2190                 .path = path,
2191                 .desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA,
2192                 .disposition = FILE_OPEN,
2193                 .create_options = cifs_create_options(cifs_sb, 0),
2194                 .fid = fid,
2195         };
2196
2197         rc = SMB2_open_init(tcon, server,
2198                             &rqst[0], &oplock, &oparms, utf16_path);
2199         if (rc)
2200                 goto qdf_free;
2201         smb2_set_next_command(tcon, &rqst[0]);
2202
2203         /* Query directory */
2204         srch_inf->entries_in_buffer = 0;
2205         srch_inf->index_of_last_entry = 2;
2206
2207         memset(&qd_iov, 0, sizeof(qd_iov));
2208         rqst[1].rq_iov = qd_iov;
2209         rqst[1].rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE;
2210
2211         rc = SMB2_query_directory_init(xid, tcon, server,
2212                                        &rqst[1],
2213                                        COMPOUND_FID, COMPOUND_FID,
2214                                        0, srch_inf->info_level);
2215         if (rc)
2216                 goto qdf_free;
2217
2218         smb2_set_related(&rqst[1]);
2219
2220 again:
2221         rc = compound_send_recv(xid, tcon->ses, server,
2222                                 flags, 2, rqst,
2223                                 resp_buftype, rsp_iov);
2224
2225         if (rc == -EAGAIN && retry_count++ < 10)
2226                 goto again;
2227
2228         /* If the open failed there is nothing to do */
2229         op_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base;
2230         if (op_rsp == NULL || op_rsp->hdr.Status != STATUS_SUCCESS) {
2231                 cifs_dbg(FYI, "query_dir_first: open failed rc=%d\n", rc);
2232                 goto qdf_free;
2233         }
2234         fid->persistent_fid = op_rsp->PersistentFileId;
2235         fid->volatile_fid = op_rsp->VolatileFileId;
2236
2237         /* Anything else than ENODATA means a genuine error */
2238         if (rc && rc != -ENODATA) {
2239                 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2240                 cifs_dbg(FYI, "query_dir_first: query directory failed rc=%d\n", rc);
2241                 trace_smb3_query_dir_err(xid, fid->persistent_fid,
2242                                          tcon->tid, tcon->ses->Suid, 0, 0, rc);
2243                 goto qdf_free;
2244         }
2245
2246         atomic_inc(&tcon->num_remote_opens);
2247
2248         qd_rsp = (struct smb2_query_directory_rsp *)rsp_iov[1].iov_base;
2249         if (qd_rsp->hdr.Status == STATUS_NO_MORE_FILES) {
2250                 trace_smb3_query_dir_done(xid, fid->persistent_fid,
2251                                           tcon->tid, tcon->ses->Suid, 0, 0);
2252                 srch_inf->endOfSearch = true;
2253                 rc = 0;
2254                 goto qdf_free;
2255         }
2256
2257         rc = smb2_parse_query_directory(tcon, &rsp_iov[1], resp_buftype[1],
2258                                         srch_inf);
2259         if (rc) {
2260                 trace_smb3_query_dir_err(xid, fid->persistent_fid, tcon->tid,
2261                         tcon->ses->Suid, 0, 0, rc);
2262                 goto qdf_free;
2263         }
2264         resp_buftype[1] = CIFS_NO_BUFFER;
2265
2266         trace_smb3_query_dir_done(xid, fid->persistent_fid, tcon->tid,
2267                         tcon->ses->Suid, 0, srch_inf->entries_in_buffer);
2268
2269  qdf_free:
2270         kfree(utf16_path);
2271         SMB2_open_free(&rqst[0]);
2272         SMB2_query_directory_free(&rqst[1]);
2273         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2274         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2275         return rc;
2276 }
2277
2278 static int
2279 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
2280                     struct cifs_fid *fid, __u16 search_flags,
2281                     struct cifs_search_info *srch_inf)
2282 {
2283         return SMB2_query_directory(xid, tcon, fid->persistent_fid,
2284                                     fid->volatile_fid, 0, srch_inf);
2285 }
2286
2287 static int
2288 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
2289                struct cifs_fid *fid)
2290 {
2291         return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2292 }
2293
2294 /*
2295  * If we negotiate SMB2 protocol and get STATUS_PENDING - update
2296  * the number of credits and return true. Otherwise - return false.
2297  */
2298 static bool
2299 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server)
2300 {
2301         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2302         int scredits, in_flight;
2303
2304         if (shdr->Status != STATUS_PENDING)
2305                 return false;
2306
2307         if (shdr->CreditRequest) {
2308                 spin_lock(&server->req_lock);
2309                 server->credits += le16_to_cpu(shdr->CreditRequest);
2310                 scredits = server->credits;
2311                 in_flight = server->in_flight;
2312                 spin_unlock(&server->req_lock);
2313                 wake_up(&server->request_q);
2314
2315                 trace_smb3_pend_credits(server->CurrentMid,
2316                                 server->conn_id, server->hostname, scredits,
2317                                 le16_to_cpu(shdr->CreditRequest), in_flight);
2318                 cifs_dbg(FYI, "%s: status pending add %u credits total=%d\n",
2319                                 __func__, le16_to_cpu(shdr->CreditRequest), scredits);
2320         }
2321
2322         return true;
2323 }
2324
2325 static bool
2326 smb2_is_session_expired(char *buf)
2327 {
2328         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2329
2330         if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED &&
2331             shdr->Status != STATUS_USER_SESSION_DELETED)
2332                 return false;
2333
2334         trace_smb3_ses_expired(le32_to_cpu(shdr->Id.SyncId.TreeId),
2335                                le64_to_cpu(shdr->SessionId),
2336                                le16_to_cpu(shdr->Command),
2337                                le64_to_cpu(shdr->MessageId));
2338         cifs_dbg(FYI, "Session expired or deleted\n");
2339
2340         return true;
2341 }
2342
2343 static bool
2344 smb2_is_status_io_timeout(char *buf)
2345 {
2346         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2347
2348         if (shdr->Status == STATUS_IO_TIMEOUT)
2349                 return true;
2350         else
2351                 return false;
2352 }
2353
2354 static void
2355 smb2_is_network_name_deleted(char *buf, struct TCP_Server_Info *server)
2356 {
2357         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2358         struct TCP_Server_Info *pserver;
2359         struct cifs_ses *ses;
2360         struct cifs_tcon *tcon;
2361
2362         if (shdr->Status != STATUS_NETWORK_NAME_DELETED)
2363                 return;
2364
2365         /* If server is a channel, select the primary channel */
2366         pserver = CIFS_SERVER_IS_CHAN(server) ? server->primary_server : server;
2367
2368         spin_lock(&cifs_tcp_ses_lock);
2369         list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) {
2370                 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
2371                         if (tcon->tid == le32_to_cpu(shdr->Id.SyncId.TreeId)) {
2372                                 spin_lock(&tcon->tc_lock);
2373                                 tcon->need_reconnect = true;
2374                                 spin_unlock(&tcon->tc_lock);
2375                                 spin_unlock(&cifs_tcp_ses_lock);
2376                                 pr_warn_once("Server share %s deleted.\n",
2377                                              tcon->tree_name);
2378                                 return;
2379                         }
2380                 }
2381         }
2382         spin_unlock(&cifs_tcp_ses_lock);
2383 }
2384
2385 static int
2386 smb2_oplock_response(struct cifs_tcon *tcon, __u64 persistent_fid,
2387                 __u64 volatile_fid, __u16 net_fid, struct cifsInodeInfo *cinode)
2388 {
2389         if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
2390                 return SMB2_lease_break(0, tcon, cinode->lease_key,
2391                                         smb2_get_lease_state(cinode));
2392
2393         return SMB2_oplock_break(0, tcon, persistent_fid, volatile_fid,
2394                                  CIFS_CACHE_READ(cinode) ? 1 : 0);
2395 }
2396
2397 void
2398 smb2_set_related(struct smb_rqst *rqst)
2399 {
2400         struct smb2_hdr *shdr;
2401
2402         shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base);
2403         if (shdr == NULL) {
2404                 cifs_dbg(FYI, "shdr NULL in smb2_set_related\n");
2405                 return;
2406         }
2407         shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
2408 }
2409
2410 char smb2_padding[7] = {0, 0, 0, 0, 0, 0, 0};
2411
2412 void
2413 smb2_set_next_command(struct cifs_tcon *tcon, struct smb_rqst *rqst)
2414 {
2415         struct smb2_hdr *shdr;
2416         struct cifs_ses *ses = tcon->ses;
2417         struct TCP_Server_Info *server = ses->server;
2418         unsigned long len = smb_rqst_len(server, rqst);
2419         int i, num_padding;
2420
2421         shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base);
2422         if (shdr == NULL) {
2423                 cifs_dbg(FYI, "shdr NULL in smb2_set_next_command\n");
2424                 return;
2425         }
2426
2427         /* SMB headers in a compound are 8 byte aligned. */
2428
2429         /* No padding needed */
2430         if (!(len & 7))
2431                 goto finished;
2432
2433         num_padding = 8 - (len & 7);
2434         if (!smb3_encryption_required(tcon)) {
2435                 /*
2436                  * If we do not have encryption then we can just add an extra
2437                  * iov for the padding.
2438                  */
2439                 rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding;
2440                 rqst->rq_iov[rqst->rq_nvec].iov_len = num_padding;
2441                 rqst->rq_nvec++;
2442                 len += num_padding;
2443         } else {
2444                 /*
2445                  * We can not add a small padding iov for the encryption case
2446                  * because the encryption framework can not handle the padding
2447                  * iovs.
2448                  * We have to flatten this into a single buffer and add
2449                  * the padding to it.
2450                  */
2451                 for (i = 1; i < rqst->rq_nvec; i++) {
2452                         memcpy(rqst->rq_iov[0].iov_base +
2453                                rqst->rq_iov[0].iov_len,
2454                                rqst->rq_iov[i].iov_base,
2455                                rqst->rq_iov[i].iov_len);
2456                         rqst->rq_iov[0].iov_len += rqst->rq_iov[i].iov_len;
2457                 }
2458                 memset(rqst->rq_iov[0].iov_base + rqst->rq_iov[0].iov_len,
2459                        0, num_padding);
2460                 rqst->rq_iov[0].iov_len += num_padding;
2461                 len += num_padding;
2462                 rqst->rq_nvec = 1;
2463         }
2464
2465  finished:
2466         shdr->NextCommand = cpu_to_le32(len);
2467 }
2468
2469 /*
2470  * Passes the query info response back to the caller on success.
2471  * Caller need to free this with free_rsp_buf().
2472  */
2473 int
2474 smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon,
2475                          const char *path, u32 desired_access,
2476                          u32 class, u32 type, u32 output_len,
2477                          struct kvec *rsp, int *buftype,
2478                          struct cifs_sb_info *cifs_sb)
2479 {
2480         struct cifs_ses *ses = tcon->ses;
2481         struct TCP_Server_Info *server = cifs_pick_channel(ses);
2482         int flags = CIFS_CP_CREATE_CLOSE_OP;
2483         struct smb_rqst rqst[3];
2484         int resp_buftype[3];
2485         struct kvec rsp_iov[3];
2486         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2487         struct kvec qi_iov[1];
2488         struct kvec close_iov[1];
2489         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2490         struct cifs_open_parms oparms;
2491         struct cifs_fid fid;
2492         int rc;
2493         __le16 *utf16_path;
2494         struct cached_fid *cfid = NULL;
2495
2496         if (!path)
2497                 path = "";
2498         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2499         if (!utf16_path)
2500                 return -ENOMEM;
2501
2502         if (smb3_encryption_required(tcon))
2503                 flags |= CIFS_TRANSFORM_REQ;
2504
2505         memset(rqst, 0, sizeof(rqst));
2506         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
2507         memset(rsp_iov, 0, sizeof(rsp_iov));
2508
2509         /*
2510          * We can only call this for things we know are directories.
2511          */
2512         if (!strcmp(path, ""))
2513                 open_cached_dir(xid, tcon, path, cifs_sb, false,
2514                                 &cfid); /* cfid null if open dir failed */
2515
2516         memset(&open_iov, 0, sizeof(open_iov));
2517         rqst[0].rq_iov = open_iov;
2518         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2519
2520         oparms = (struct cifs_open_parms) {
2521                 .tcon = tcon,
2522                 .path = path,
2523                 .desired_access = desired_access,
2524                 .disposition = FILE_OPEN,
2525                 .create_options = cifs_create_options(cifs_sb, 0),
2526                 .fid = &fid,
2527         };
2528
2529         rc = SMB2_open_init(tcon, server,
2530                             &rqst[0], &oplock, &oparms, utf16_path);
2531         if (rc)
2532                 goto qic_exit;
2533         smb2_set_next_command(tcon, &rqst[0]);
2534
2535         memset(&qi_iov, 0, sizeof(qi_iov));
2536         rqst[1].rq_iov = qi_iov;
2537         rqst[1].rq_nvec = 1;
2538
2539         if (cfid) {
2540                 rc = SMB2_query_info_init(tcon, server,
2541                                           &rqst[1],
2542                                           cfid->fid.persistent_fid,
2543                                           cfid->fid.volatile_fid,
2544                                           class, type, 0,
2545                                           output_len, 0,
2546                                           NULL);
2547         } else {
2548                 rc = SMB2_query_info_init(tcon, server,
2549                                           &rqst[1],
2550                                           COMPOUND_FID,
2551                                           COMPOUND_FID,
2552                                           class, type, 0,
2553                                           output_len, 0,
2554                                           NULL);
2555         }
2556         if (rc)
2557                 goto qic_exit;
2558         if (!cfid) {
2559                 smb2_set_next_command(tcon, &rqst[1]);
2560                 smb2_set_related(&rqst[1]);
2561         }
2562
2563         memset(&close_iov, 0, sizeof(close_iov));
2564         rqst[2].rq_iov = close_iov;
2565         rqst[2].rq_nvec = 1;
2566
2567         rc = SMB2_close_init(tcon, server,
2568                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
2569         if (rc)
2570                 goto qic_exit;
2571         smb2_set_related(&rqst[2]);
2572
2573         if (cfid) {
2574                 rc = compound_send_recv(xid, ses, server,
2575                                         flags, 1, &rqst[1],
2576                                         &resp_buftype[1], &rsp_iov[1]);
2577         } else {
2578                 rc = compound_send_recv(xid, ses, server,
2579                                         flags, 3, rqst,
2580                                         resp_buftype, rsp_iov);
2581         }
2582         if (rc) {
2583                 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2584                 if (rc == -EREMCHG) {
2585                         tcon->need_reconnect = true;
2586                         pr_warn_once("server share %s deleted\n",
2587                                      tcon->tree_name);
2588                 }
2589                 goto qic_exit;
2590         }
2591         *rsp = rsp_iov[1];
2592         *buftype = resp_buftype[1];
2593
2594  qic_exit:
2595         kfree(utf16_path);
2596         SMB2_open_free(&rqst[0]);
2597         SMB2_query_info_free(&rqst[1]);
2598         SMB2_close_free(&rqst[2]);
2599         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2600         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
2601         if (cfid)
2602                 close_cached_dir(cfid);
2603         return rc;
2604 }
2605
2606 static int
2607 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2608              struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
2609 {
2610         struct smb2_query_info_rsp *rsp;
2611         struct smb2_fs_full_size_info *info = NULL;
2612         struct kvec rsp_iov = {NULL, 0};
2613         int buftype = CIFS_NO_BUFFER;
2614         int rc;
2615
2616
2617         rc = smb2_query_info_compound(xid, tcon, "",
2618                                       FILE_READ_ATTRIBUTES,
2619                                       FS_FULL_SIZE_INFORMATION,
2620                                       SMB2_O_INFO_FILESYSTEM,
2621                                       sizeof(struct smb2_fs_full_size_info),
2622                                       &rsp_iov, &buftype, cifs_sb);
2623         if (rc)
2624                 goto qfs_exit;
2625
2626         rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
2627         buf->f_type = SMB2_SUPER_MAGIC;
2628         info = (struct smb2_fs_full_size_info *)(
2629                 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
2630         rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
2631                                le32_to_cpu(rsp->OutputBufferLength),
2632                                &rsp_iov,
2633                                sizeof(struct smb2_fs_full_size_info));
2634         if (!rc)
2635                 smb2_copy_fs_info_to_kstatfs(info, buf);
2636
2637 qfs_exit:
2638         free_rsp_buf(buftype, rsp_iov.iov_base);
2639         return rc;
2640 }
2641
2642 static int
2643 smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2644                struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
2645 {
2646         int rc;
2647         __le16 srch_path = 0; /* Null - open root of share */
2648         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2649         struct cifs_open_parms oparms;
2650         struct cifs_fid fid;
2651
2652         if (!tcon->posix_extensions)
2653                 return smb2_queryfs(xid, tcon, cifs_sb, buf);
2654
2655         oparms = (struct cifs_open_parms) {
2656                 .tcon = tcon,
2657                 .path = "",
2658                 .desired_access = FILE_READ_ATTRIBUTES,
2659                 .disposition = FILE_OPEN,
2660                 .create_options = cifs_create_options(cifs_sb, 0),
2661                 .fid = &fid,
2662         };
2663
2664         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
2665                        NULL, NULL);
2666         if (rc)
2667                 return rc;
2668
2669         rc = SMB311_posix_qfs_info(xid, tcon, fid.persistent_fid,
2670                                    fid.volatile_fid, buf);
2671         buf->f_type = SMB2_SUPER_MAGIC;
2672         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2673         return rc;
2674 }
2675
2676 static bool
2677 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
2678 {
2679         return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
2680                ob1->fid.volatile_fid == ob2->fid.volatile_fid;
2681 }
2682
2683 static int
2684 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
2685                __u64 length, __u32 type, int lock, int unlock, bool wait)
2686 {
2687         if (unlock && !lock)
2688                 type = SMB2_LOCKFLAG_UNLOCK;
2689         return SMB2_lock(xid, tlink_tcon(cfile->tlink),
2690                          cfile->fid.persistent_fid, cfile->fid.volatile_fid,
2691                          current->tgid, length, offset, type, wait);
2692 }
2693
2694 static void
2695 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
2696 {
2697         memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
2698 }
2699
2700 static void
2701 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
2702 {
2703         memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
2704 }
2705
2706 static void
2707 smb2_new_lease_key(struct cifs_fid *fid)
2708 {
2709         generate_random_uuid(fid->lease_key);
2710 }
2711
2712 static int
2713 smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
2714                    const char *search_name,
2715                    struct dfs_info3_param **target_nodes,
2716                    unsigned int *num_of_nodes,
2717                    const struct nls_table *nls_codepage, int remap)
2718 {
2719         int rc;
2720         __le16 *utf16_path = NULL;
2721         int utf16_path_len = 0;
2722         struct cifs_tcon *tcon;
2723         struct fsctl_get_dfs_referral_req *dfs_req = NULL;
2724         struct get_dfs_referral_rsp *dfs_rsp = NULL;
2725         u32 dfs_req_size = 0, dfs_rsp_size = 0;
2726         int retry_count = 0;
2727
2728         cifs_dbg(FYI, "%s: path: %s\n", __func__, search_name);
2729
2730         /*
2731          * Try to use the IPC tcon, otherwise just use any
2732          */
2733         tcon = ses->tcon_ipc;
2734         if (tcon == NULL) {
2735                 spin_lock(&cifs_tcp_ses_lock);
2736                 tcon = list_first_entry_or_null(&ses->tcon_list,
2737                                                 struct cifs_tcon,
2738                                                 tcon_list);
2739                 if (tcon)
2740                         tcon->tc_count++;
2741                 spin_unlock(&cifs_tcp_ses_lock);
2742         }
2743
2744         if (tcon == NULL) {
2745                 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n",
2746                          ses);
2747                 rc = -ENOTCONN;
2748                 goto out;
2749         }
2750
2751         utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX,
2752                                            &utf16_path_len,
2753                                            nls_codepage, remap);
2754         if (!utf16_path) {
2755                 rc = -ENOMEM;
2756                 goto out;
2757         }
2758
2759         dfs_req_size = sizeof(*dfs_req) + utf16_path_len;
2760         dfs_req = kzalloc(dfs_req_size, GFP_KERNEL);
2761         if (!dfs_req) {
2762                 rc = -ENOMEM;
2763                 goto out;
2764         }
2765
2766         /* Highest DFS referral version understood */
2767         dfs_req->MaxReferralLevel = DFS_VERSION;
2768
2769         /* Path to resolve in an UTF-16 null-terminated string */
2770         memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len);
2771
2772         do {
2773                 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
2774                                 FSCTL_DFS_GET_REFERRALS,
2775                                 (char *)dfs_req, dfs_req_size, CIFSMaxBufSize,
2776                                 (char **)&dfs_rsp, &dfs_rsp_size);
2777                 if (!is_retryable_error(rc))
2778                         break;
2779                 usleep_range(512, 2048);
2780         } while (++retry_count < 5);
2781
2782         if (rc) {
2783                 if (!is_retryable_error(rc) && rc != -ENOENT && rc != -EOPNOTSUPP)
2784                         cifs_tcon_dbg(VFS, "%s: ioctl error: rc=%d\n", __func__, rc);
2785                 goto out;
2786         }
2787
2788         rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size,
2789                                  num_of_nodes, target_nodes,
2790                                  nls_codepage, remap, search_name,
2791                                  true /* is_unicode */);
2792         if (rc) {
2793                 cifs_tcon_dbg(VFS, "parse error in %s rc=%d\n", __func__, rc);
2794                 goto out;
2795         }
2796
2797  out:
2798         if (tcon && !tcon->ipc) {
2799                 /* ipc tcons are not refcounted */
2800                 spin_lock(&cifs_tcp_ses_lock);
2801                 tcon->tc_count--;
2802                 /* tc_count can never go negative */
2803                 WARN_ON(tcon->tc_count < 0);
2804                 spin_unlock(&cifs_tcp_ses_lock);
2805         }
2806         kfree(utf16_path);
2807         kfree(dfs_req);
2808         kfree(dfs_rsp);
2809         return rc;
2810 }
2811
2812 static int
2813 parse_reparse_posix(struct reparse_posix_data *symlink_buf,
2814                       u32 plen, char **target_path,
2815                       struct cifs_sb_info *cifs_sb)
2816 {
2817         unsigned int len;
2818
2819         /* See MS-FSCC 2.1.2.6 for the 'NFS' style reparse tags */
2820         len = le16_to_cpu(symlink_buf->ReparseDataLength);
2821
2822         if (le64_to_cpu(symlink_buf->InodeType) != NFS_SPECFILE_LNK) {
2823                 cifs_dbg(VFS, "%lld not a supported symlink type\n",
2824                         le64_to_cpu(symlink_buf->InodeType));
2825                 return -EOPNOTSUPP;
2826         }
2827
2828         *target_path = cifs_strndup_from_utf16(
2829                                 symlink_buf->PathBuffer,
2830                                 len, true, cifs_sb->local_nls);
2831         if (!(*target_path))
2832                 return -ENOMEM;
2833
2834         convert_delimiter(*target_path, '/');
2835         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
2836
2837         return 0;
2838 }
2839
2840 static int
2841 parse_reparse_symlink(struct reparse_symlink_data_buffer *symlink_buf,
2842                       u32 plen, char **target_path,
2843                       struct cifs_sb_info *cifs_sb)
2844 {
2845         unsigned int sub_len;
2846         unsigned int sub_offset;
2847
2848         /* We handle Symbolic Link reparse tag here. See: MS-FSCC 2.1.2.4 */
2849
2850         sub_offset = le16_to_cpu(symlink_buf->SubstituteNameOffset);
2851         sub_len = le16_to_cpu(symlink_buf->SubstituteNameLength);
2852         if (sub_offset + 20 > plen ||
2853             sub_offset + sub_len + 20 > plen) {
2854                 cifs_dbg(VFS, "srv returned malformed symlink buffer\n");
2855                 return -EIO;
2856         }
2857
2858         *target_path = cifs_strndup_from_utf16(
2859                                 symlink_buf->PathBuffer + sub_offset,
2860                                 sub_len, true, cifs_sb->local_nls);
2861         if (!(*target_path))
2862                 return -ENOMEM;
2863
2864         convert_delimiter(*target_path, '/');
2865         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
2866
2867         return 0;
2868 }
2869
2870 static int
2871 parse_reparse_point(struct reparse_data_buffer *buf,
2872                     u32 plen, char **target_path,
2873                     struct cifs_sb_info *cifs_sb)
2874 {
2875         if (plen < sizeof(struct reparse_data_buffer)) {
2876                 cifs_dbg(VFS, "reparse buffer is too small. Must be at least 8 bytes but was %d\n",
2877                          plen);
2878                 return -EIO;
2879         }
2880
2881         if (plen < le16_to_cpu(buf->ReparseDataLength) +
2882             sizeof(struct reparse_data_buffer)) {
2883                 cifs_dbg(VFS, "srv returned invalid reparse buf length: %d\n",
2884                          plen);
2885                 return -EIO;
2886         }
2887
2888         /* See MS-FSCC 2.1.2 */
2889         switch (le32_to_cpu(buf->ReparseTag)) {
2890         case IO_REPARSE_TAG_NFS:
2891                 return parse_reparse_posix(
2892                         (struct reparse_posix_data *)buf,
2893                         plen, target_path, cifs_sb);
2894         case IO_REPARSE_TAG_SYMLINK:
2895                 return parse_reparse_symlink(
2896                         (struct reparse_symlink_data_buffer *)buf,
2897                         plen, target_path, cifs_sb);
2898         default:
2899                 cifs_dbg(VFS, "srv returned unknown symlink buffer tag:0x%08x\n",
2900                          le32_to_cpu(buf->ReparseTag));
2901                 return -EOPNOTSUPP;
2902         }
2903 }
2904
2905 static int
2906 smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
2907                    struct cifs_sb_info *cifs_sb, const char *full_path,
2908                    char **target_path, bool is_reparse_point)
2909 {
2910         int rc;
2911         __le16 *utf16_path = NULL;
2912         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2913         struct cifs_open_parms oparms;
2914         struct cifs_fid fid;
2915         struct kvec err_iov = {NULL, 0};
2916         struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
2917         int flags = CIFS_CP_CREATE_CLOSE_OP;
2918         struct smb_rqst rqst[3];
2919         int resp_buftype[3];
2920         struct kvec rsp_iov[3];
2921         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2922         struct kvec io_iov[SMB2_IOCTL_IOV_SIZE];
2923         struct kvec close_iov[1];
2924         struct smb2_create_rsp *create_rsp;
2925         struct smb2_ioctl_rsp *ioctl_rsp;
2926         struct reparse_data_buffer *reparse_buf;
2927         int create_options = is_reparse_point ? OPEN_REPARSE_POINT : 0;
2928         u32 plen;
2929
2930         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
2931
2932         *target_path = NULL;
2933
2934         if (smb3_encryption_required(tcon))
2935                 flags |= CIFS_TRANSFORM_REQ;
2936
2937         memset(rqst, 0, sizeof(rqst));
2938         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
2939         memset(rsp_iov, 0, sizeof(rsp_iov));
2940
2941         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
2942         if (!utf16_path)
2943                 return -ENOMEM;
2944
2945         /* Open */
2946         memset(&open_iov, 0, sizeof(open_iov));
2947         rqst[0].rq_iov = open_iov;
2948         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2949
2950         oparms = (struct cifs_open_parms) {
2951                 .tcon = tcon,
2952                 .path = full_path,
2953                 .desired_access = FILE_READ_ATTRIBUTES,
2954                 .disposition = FILE_OPEN,
2955                 .create_options = cifs_create_options(cifs_sb, create_options),
2956                 .fid = &fid,
2957         };
2958
2959         rc = SMB2_open_init(tcon, server,
2960                             &rqst[0], &oplock, &oparms, utf16_path);
2961         if (rc)
2962                 goto querty_exit;
2963         smb2_set_next_command(tcon, &rqst[0]);
2964
2965
2966         /* IOCTL */
2967         memset(&io_iov, 0, sizeof(io_iov));
2968         rqst[1].rq_iov = io_iov;
2969         rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
2970
2971         rc = SMB2_ioctl_init(tcon, server,
2972                              &rqst[1], fid.persistent_fid,
2973                              fid.volatile_fid, FSCTL_GET_REPARSE_POINT, NULL, 0,
2974                              CIFSMaxBufSize -
2975                              MAX_SMB2_CREATE_RESPONSE_SIZE -
2976                              MAX_SMB2_CLOSE_RESPONSE_SIZE);
2977         if (rc)
2978                 goto querty_exit;
2979
2980         smb2_set_next_command(tcon, &rqst[1]);
2981         smb2_set_related(&rqst[1]);
2982
2983
2984         /* Close */
2985         memset(&close_iov, 0, sizeof(close_iov));
2986         rqst[2].rq_iov = close_iov;
2987         rqst[2].rq_nvec = 1;
2988
2989         rc = SMB2_close_init(tcon, server,
2990                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
2991         if (rc)
2992                 goto querty_exit;
2993
2994         smb2_set_related(&rqst[2]);
2995
2996         rc = compound_send_recv(xid, tcon->ses, server,
2997                                 flags, 3, rqst,
2998                                 resp_buftype, rsp_iov);
2999
3000         create_rsp = rsp_iov[0].iov_base;
3001         if (create_rsp && create_rsp->hdr.Status)
3002                 err_iov = rsp_iov[0];
3003         ioctl_rsp = rsp_iov[1].iov_base;
3004
3005         /*
3006          * Open was successful and we got an ioctl response.
3007          */
3008         if ((rc == 0) && (is_reparse_point)) {
3009                 /* See MS-FSCC 2.3.23 */
3010
3011                 reparse_buf = (struct reparse_data_buffer *)
3012                         ((char *)ioctl_rsp +
3013                          le32_to_cpu(ioctl_rsp->OutputOffset));
3014                 plen = le32_to_cpu(ioctl_rsp->OutputCount);
3015
3016                 if (plen + le32_to_cpu(ioctl_rsp->OutputOffset) >
3017                     rsp_iov[1].iov_len) {
3018                         cifs_tcon_dbg(VFS, "srv returned invalid ioctl len: %d\n",
3019                                  plen);
3020                         rc = -EIO;
3021                         goto querty_exit;
3022                 }
3023
3024                 rc = parse_reparse_point(reparse_buf, plen, target_path,
3025                                          cifs_sb);
3026                 goto querty_exit;
3027         }
3028
3029         if (!rc || !err_iov.iov_base) {
3030                 rc = -ENOENT;
3031                 goto querty_exit;
3032         }
3033
3034         rc = smb2_parse_symlink_response(cifs_sb, &err_iov, target_path);
3035
3036  querty_exit:
3037         cifs_dbg(FYI, "query symlink rc %d\n", rc);
3038         kfree(utf16_path);
3039         SMB2_open_free(&rqst[0]);
3040         SMB2_ioctl_free(&rqst[1]);
3041         SMB2_close_free(&rqst[2]);
3042         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
3043         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
3044         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
3045         return rc;
3046 }
3047
3048 int
3049 smb2_query_reparse_tag(const unsigned int xid, struct cifs_tcon *tcon,
3050                    struct cifs_sb_info *cifs_sb, const char *full_path,
3051                    __u32 *tag)
3052 {
3053         int rc;
3054         __le16 *utf16_path = NULL;
3055         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3056         struct cifs_open_parms oparms;
3057         struct cifs_fid fid;
3058         struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
3059         int flags = CIFS_CP_CREATE_CLOSE_OP;
3060         struct smb_rqst rqst[3];
3061         int resp_buftype[3];
3062         struct kvec rsp_iov[3];
3063         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
3064         struct kvec io_iov[SMB2_IOCTL_IOV_SIZE];
3065         struct kvec close_iov[1];
3066         struct smb2_ioctl_rsp *ioctl_rsp;
3067         struct reparse_data_buffer *reparse_buf;
3068         u32 plen;
3069
3070         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
3071
3072         if (smb3_encryption_required(tcon))
3073                 flags |= CIFS_TRANSFORM_REQ;
3074
3075         memset(rqst, 0, sizeof(rqst));
3076         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
3077         memset(rsp_iov, 0, sizeof(rsp_iov));
3078
3079         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
3080         if (!utf16_path)
3081                 return -ENOMEM;
3082
3083         /*
3084          * setup smb2open - TODO add optimization to call cifs_get_readable_path
3085          * to see if there is a handle already open that we can use
3086          */
3087         memset(&open_iov, 0, sizeof(open_iov));
3088         rqst[0].rq_iov = open_iov;
3089         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
3090
3091         oparms = (struct cifs_open_parms) {
3092                 .tcon = tcon,
3093                 .path = full_path,
3094                 .desired_access = FILE_READ_ATTRIBUTES,
3095                 .disposition = FILE_OPEN,
3096                 .create_options = cifs_create_options(cifs_sb, OPEN_REPARSE_POINT),
3097                 .fid = &fid,
3098         };
3099
3100         rc = SMB2_open_init(tcon, server,
3101                             &rqst[0], &oplock, &oparms, utf16_path);
3102         if (rc)
3103                 goto query_rp_exit;
3104         smb2_set_next_command(tcon, &rqst[0]);
3105
3106
3107         /* IOCTL */
3108         memset(&io_iov, 0, sizeof(io_iov));
3109         rqst[1].rq_iov = io_iov;
3110         rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
3111
3112         rc = SMB2_ioctl_init(tcon, server,
3113                              &rqst[1], COMPOUND_FID,
3114                              COMPOUND_FID, FSCTL_GET_REPARSE_POINT, NULL, 0,
3115                              CIFSMaxBufSize -
3116                              MAX_SMB2_CREATE_RESPONSE_SIZE -
3117                              MAX_SMB2_CLOSE_RESPONSE_SIZE);
3118         if (rc)
3119                 goto query_rp_exit;
3120
3121         smb2_set_next_command(tcon, &rqst[1]);
3122         smb2_set_related(&rqst[1]);
3123
3124
3125         /* Close */
3126         memset(&close_iov, 0, sizeof(close_iov));
3127         rqst[2].rq_iov = close_iov;
3128         rqst[2].rq_nvec = 1;
3129
3130         rc = SMB2_close_init(tcon, server,
3131                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
3132         if (rc)
3133                 goto query_rp_exit;
3134
3135         smb2_set_related(&rqst[2]);
3136
3137         rc = compound_send_recv(xid, tcon->ses, server,
3138                                 flags, 3, rqst,
3139                                 resp_buftype, rsp_iov);
3140
3141         ioctl_rsp = rsp_iov[1].iov_base;
3142
3143         /*
3144          * Open was successful and we got an ioctl response.
3145          */
3146         if (rc == 0) {
3147                 /* See MS-FSCC 2.3.23 */
3148
3149                 reparse_buf = (struct reparse_data_buffer *)
3150                         ((char *)ioctl_rsp +
3151                          le32_to_cpu(ioctl_rsp->OutputOffset));
3152                 plen = le32_to_cpu(ioctl_rsp->OutputCount);
3153
3154                 if (plen + le32_to_cpu(ioctl_rsp->OutputOffset) >
3155                     rsp_iov[1].iov_len) {
3156                         cifs_tcon_dbg(FYI, "srv returned invalid ioctl len: %d\n",
3157                                  plen);
3158                         rc = -EIO;
3159                         goto query_rp_exit;
3160                 }
3161                 *tag = le32_to_cpu(reparse_buf->ReparseTag);
3162         }
3163
3164  query_rp_exit:
3165         kfree(utf16_path);
3166         SMB2_open_free(&rqst[0]);
3167         SMB2_ioctl_free(&rqst[1]);
3168         SMB2_close_free(&rqst[2]);
3169         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
3170         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
3171         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
3172         return rc;
3173 }
3174
3175 static struct cifs_ntsd *
3176 get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb,
3177                     const struct cifs_fid *cifsfid, u32 *pacllen, u32 info)
3178 {
3179         struct cifs_ntsd *pntsd = NULL;
3180         unsigned int xid;
3181         int rc = -EOPNOTSUPP;
3182         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3183
3184         if (IS_ERR(tlink))
3185                 return ERR_CAST(tlink);
3186
3187         xid = get_xid();
3188         cifs_dbg(FYI, "trying to get acl\n");
3189
3190         rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid,
3191                             cifsfid->volatile_fid, (void **)&pntsd, pacllen,
3192                             info);
3193         free_xid(xid);
3194
3195         cifs_put_tlink(tlink);
3196
3197         cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
3198         if (rc)
3199                 return ERR_PTR(rc);
3200         return pntsd;
3201
3202 }
3203
3204 static struct cifs_ntsd *
3205 get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb,
3206                      const char *path, u32 *pacllen, u32 info)
3207 {
3208         struct cifs_ntsd *pntsd = NULL;
3209         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3210         unsigned int xid;
3211         int rc;
3212         struct cifs_tcon *tcon;
3213         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3214         struct cifs_fid fid;
3215         struct cifs_open_parms oparms;
3216         __le16 *utf16_path;
3217
3218         cifs_dbg(FYI, "get smb3 acl for path %s\n", path);
3219         if (IS_ERR(tlink))
3220                 return ERR_CAST(tlink);
3221
3222         tcon = tlink_tcon(tlink);
3223         xid = get_xid();
3224
3225         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
3226         if (!utf16_path) {
3227                 rc = -ENOMEM;
3228                 free_xid(xid);
3229                 return ERR_PTR(rc);
3230         }
3231
3232         oparms = (struct cifs_open_parms) {
3233                 .tcon = tcon,
3234                 .path = path,
3235                 .desired_access = READ_CONTROL,
3236                 .disposition = FILE_OPEN,
3237                 /*
3238                  * When querying an ACL, even if the file is a symlink
3239                  * we want to open the source not the target, and so
3240                  * the protocol requires that the client specify this
3241                  * flag when opening a reparse point
3242                  */
3243                 .create_options = cifs_create_options(cifs_sb, 0) |
3244                                   OPEN_REPARSE_POINT,
3245                 .fid = &fid,
3246         };
3247
3248         if (info & SACL_SECINFO)
3249                 oparms.desired_access |= SYSTEM_SECURITY;
3250
3251         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
3252                        NULL);
3253         kfree(utf16_path);
3254         if (!rc) {
3255                 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3256                                     fid.volatile_fid, (void **)&pntsd, pacllen,
3257                                     info);
3258                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3259         }
3260
3261         cifs_put_tlink(tlink);
3262         free_xid(xid);
3263
3264         cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
3265         if (rc)
3266                 return ERR_PTR(rc);
3267         return pntsd;
3268 }
3269
3270 static int
3271 set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
3272                 struct inode *inode, const char *path, int aclflag)
3273 {
3274         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3275         unsigned int xid;
3276         int rc, access_flags = 0;
3277         struct cifs_tcon *tcon;
3278         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
3279         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3280         struct cifs_fid fid;
3281         struct cifs_open_parms oparms;
3282         __le16 *utf16_path;
3283
3284         cifs_dbg(FYI, "set smb3 acl for path %s\n", path);
3285         if (IS_ERR(tlink))
3286                 return PTR_ERR(tlink);
3287
3288         tcon = tlink_tcon(tlink);
3289         xid = get_xid();
3290
3291         if (aclflag & CIFS_ACL_OWNER || aclflag & CIFS_ACL_GROUP)
3292                 access_flags |= WRITE_OWNER;
3293         if (aclflag & CIFS_ACL_SACL)
3294                 access_flags |= SYSTEM_SECURITY;
3295         if (aclflag & CIFS_ACL_DACL)
3296                 access_flags |= WRITE_DAC;
3297
3298         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
3299         if (!utf16_path) {
3300                 rc = -ENOMEM;
3301                 free_xid(xid);
3302                 return rc;
3303         }
3304
3305         oparms = (struct cifs_open_parms) {
3306                 .tcon = tcon,
3307                 .desired_access = access_flags,
3308                 .create_options = cifs_create_options(cifs_sb, 0),
3309                 .disposition = FILE_OPEN,
3310                 .path = path,
3311                 .fid = &fid,
3312         };
3313
3314         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL,
3315                        NULL, NULL);
3316         kfree(utf16_path);
3317         if (!rc) {
3318                 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3319                             fid.volatile_fid, pnntsd, acllen, aclflag);
3320                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3321         }
3322
3323         cifs_put_tlink(tlink);
3324         free_xid(xid);
3325         return rc;
3326 }
3327
3328 /* Retrieve an ACL from the server */
3329 static struct cifs_ntsd *
3330 get_smb2_acl(struct cifs_sb_info *cifs_sb,
3331              struct inode *inode, const char *path,
3332              u32 *pacllen, u32 info)
3333 {
3334         struct cifs_ntsd *pntsd = NULL;
3335         struct cifsFileInfo *open_file = NULL;
3336
3337         if (inode && !(info & SACL_SECINFO))
3338                 open_file = find_readable_file(CIFS_I(inode), true);
3339         if (!open_file || (info & SACL_SECINFO))
3340                 return get_smb2_acl_by_path(cifs_sb, path, pacllen, info);
3341
3342         pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen, info);
3343         cifsFileInfo_put(open_file);
3344         return pntsd;
3345 }
3346
3347 static long smb3_zero_data(struct file *file, struct cifs_tcon *tcon,
3348                              loff_t offset, loff_t len, unsigned int xid)
3349 {
3350         struct cifsFileInfo *cfile = file->private_data;
3351         struct file_zero_data_information fsctl_buf;
3352
3353         cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3354
3355         fsctl_buf.FileOffset = cpu_to_le64(offset);
3356         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3357
3358         return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3359                           cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
3360                           (char *)&fsctl_buf,
3361                           sizeof(struct file_zero_data_information),
3362                           0, NULL, NULL);
3363 }
3364
3365 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
3366                             loff_t offset, loff_t len, bool keep_size)
3367 {
3368         struct cifs_ses *ses = tcon->ses;
3369         struct inode *inode = file_inode(file);
3370         struct cifsInodeInfo *cifsi = CIFS_I(inode);
3371         struct cifsFileInfo *cfile = file->private_data;
3372         long rc;
3373         unsigned int xid;
3374         __le64 eof;
3375
3376         xid = get_xid();
3377
3378         trace_smb3_zero_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3379                               ses->Suid, offset, len);
3380
3381         inode_lock(inode);
3382         filemap_invalidate_lock(inode->i_mapping);
3383
3384         /*
3385          * We zero the range through ioctl, so we need remove the page caches
3386          * first, otherwise the data may be inconsistent with the server.
3387          */
3388         truncate_pagecache_range(inode, offset, offset + len - 1);
3389
3390         /* if file not oplocked can't be sure whether asking to extend size */
3391         rc = -EOPNOTSUPP;
3392         if (keep_size == false && !CIFS_CACHE_READ(cifsi))
3393                 goto zero_range_exit;
3394
3395         rc = smb3_zero_data(file, tcon, offset, len, xid);
3396         if (rc < 0)
3397                 goto zero_range_exit;
3398
3399         /*
3400          * do we also need to change the size of the file?
3401          */
3402         if (keep_size == false && i_size_read(inode) < offset + len) {
3403                 eof = cpu_to_le64(offset + len);
3404                 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3405                                   cfile->fid.volatile_fid, cfile->pid, &eof);
3406         }
3407
3408  zero_range_exit:
3409         filemap_invalidate_unlock(inode->i_mapping);
3410         inode_unlock(inode);
3411         free_xid(xid);
3412         if (rc)
3413                 trace_smb3_zero_err(xid, cfile->fid.persistent_fid, tcon->tid,
3414                               ses->Suid, offset, len, rc);
3415         else
3416                 trace_smb3_zero_done(xid, cfile->fid.persistent_fid, tcon->tid,
3417                               ses->Suid, offset, len);
3418         return rc;
3419 }
3420
3421 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
3422                             loff_t offset, loff_t len)
3423 {
3424         struct inode *inode = file_inode(file);
3425         struct cifsFileInfo *cfile = file->private_data;
3426         struct file_zero_data_information fsctl_buf;
3427         long rc;
3428         unsigned int xid;
3429         __u8 set_sparse = 1;
3430
3431         xid = get_xid();
3432
3433         inode_lock(inode);
3434         /* Need to make file sparse, if not already, before freeing range. */
3435         /* Consider adding equivalent for compressed since it could also work */
3436         if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) {
3437                 rc = -EOPNOTSUPP;
3438                 goto out;
3439         }
3440
3441         filemap_invalidate_lock(inode->i_mapping);
3442         /*
3443          * We implement the punch hole through ioctl, so we need remove the page
3444          * caches first, otherwise the data may be inconsistent with the server.
3445          */
3446         truncate_pagecache_range(inode, offset, offset + len - 1);
3447
3448         cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3449
3450         fsctl_buf.FileOffset = cpu_to_le64(offset);
3451         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3452
3453         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3454                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
3455                         (char *)&fsctl_buf,
3456                         sizeof(struct file_zero_data_information),
3457                         CIFSMaxBufSize, NULL, NULL);
3458         filemap_invalidate_unlock(inode->i_mapping);
3459 out:
3460         inode_unlock(inode);
3461         free_xid(xid);
3462         return rc;
3463 }
3464
3465 static int smb3_simple_fallocate_write_range(unsigned int xid,
3466                                              struct cifs_tcon *tcon,
3467                                              struct cifsFileInfo *cfile,
3468                                              loff_t off, loff_t len,
3469                                              char *buf)
3470 {
3471         struct cifs_io_parms io_parms = {0};
3472         int nbytes;
3473         int rc = 0;
3474         struct kvec iov[2];
3475
3476         io_parms.netfid = cfile->fid.netfid;
3477         io_parms.pid = current->tgid;
3478         io_parms.tcon = tcon;
3479         io_parms.persistent_fid = cfile->fid.persistent_fid;
3480         io_parms.volatile_fid = cfile->fid.volatile_fid;
3481
3482         while (len) {
3483                 io_parms.offset = off;
3484                 io_parms.length = len;
3485                 if (io_parms.length > SMB2_MAX_BUFFER_SIZE)
3486                         io_parms.length = SMB2_MAX_BUFFER_SIZE;
3487                 /* iov[0] is reserved for smb header */
3488                 iov[1].iov_base = buf;
3489                 iov[1].iov_len = io_parms.length;
3490                 rc = SMB2_write(xid, &io_parms, &nbytes, iov, 1);
3491                 if (rc)
3492                         break;
3493                 if (nbytes > len)
3494                         return -EINVAL;
3495                 buf += nbytes;
3496                 off += nbytes;
3497                 len -= nbytes;
3498         }
3499         return rc;
3500 }
3501
3502 static int smb3_simple_fallocate_range(unsigned int xid,
3503                                        struct cifs_tcon *tcon,
3504                                        struct cifsFileInfo *cfile,
3505                                        loff_t off, loff_t len)
3506 {
3507         struct file_allocated_range_buffer in_data, *out_data = NULL, *tmp_data;
3508         u32 out_data_len;
3509         char *buf = NULL;
3510         loff_t l;
3511         int rc;
3512
3513         in_data.file_offset = cpu_to_le64(off);
3514         in_data.length = cpu_to_le64(len);
3515         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3516                         cfile->fid.volatile_fid,
3517                         FSCTL_QUERY_ALLOCATED_RANGES,
3518                         (char *)&in_data, sizeof(in_data),
3519                         1024 * sizeof(struct file_allocated_range_buffer),
3520                         (char **)&out_data, &out_data_len);
3521         if (rc)
3522                 goto out;
3523
3524         buf = kzalloc(1024 * 1024, GFP_KERNEL);
3525         if (buf == NULL) {
3526                 rc = -ENOMEM;
3527                 goto out;
3528         }
3529
3530         tmp_data = out_data;
3531         while (len) {
3532                 /*
3533                  * The rest of the region is unmapped so write it all.
3534                  */
3535                 if (out_data_len == 0) {
3536                         rc = smb3_simple_fallocate_write_range(xid, tcon,
3537                                                cfile, off, len, buf);
3538                         goto out;
3539                 }
3540
3541                 if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3542                         rc = -EINVAL;
3543                         goto out;
3544                 }
3545
3546                 if (off < le64_to_cpu(tmp_data->file_offset)) {
3547                         /*
3548                          * We are at a hole. Write until the end of the region
3549                          * or until the next allocated data,
3550                          * whichever comes next.
3551                          */
3552                         l = le64_to_cpu(tmp_data->file_offset) - off;
3553                         if (len < l)
3554                                 l = len;
3555                         rc = smb3_simple_fallocate_write_range(xid, tcon,
3556                                                cfile, off, l, buf);
3557                         if (rc)
3558                                 goto out;
3559                         off = off + l;
3560                         len = len - l;
3561                         if (len == 0)
3562                                 goto out;
3563                 }
3564                 /*
3565                  * We are at a section of allocated data, just skip forward
3566                  * until the end of the data or the end of the region
3567                  * we are supposed to fallocate, whichever comes first.
3568                  */
3569                 l = le64_to_cpu(tmp_data->length);
3570                 if (len < l)
3571                         l = len;
3572                 off += l;
3573                 len -= l;
3574
3575                 tmp_data = &tmp_data[1];
3576                 out_data_len -= sizeof(struct file_allocated_range_buffer);
3577         }
3578
3579  out:
3580         kfree(out_data);
3581         kfree(buf);
3582         return rc;
3583 }
3584
3585
3586 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
3587                             loff_t off, loff_t len, bool keep_size)
3588 {
3589         struct inode *inode;
3590         struct cifsInodeInfo *cifsi;
3591         struct cifsFileInfo *cfile = file->private_data;
3592         long rc = -EOPNOTSUPP;
3593         unsigned int xid;
3594         __le64 eof;
3595
3596         xid = get_xid();
3597
3598         inode = d_inode(cfile->dentry);
3599         cifsi = CIFS_I(inode);
3600
3601         trace_smb3_falloc_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3602                                 tcon->ses->Suid, off, len);
3603         /* if file not oplocked can't be sure whether asking to extend size */
3604         if (!CIFS_CACHE_READ(cifsi))
3605                 if (keep_size == false) {
3606                         trace_smb3_falloc_err(xid, cfile->fid.persistent_fid,
3607                                 tcon->tid, tcon->ses->Suid, off, len, rc);
3608                         free_xid(xid);
3609                         return rc;
3610                 }
3611
3612         /*
3613          * Extending the file
3614          */
3615         if ((keep_size == false) && i_size_read(inode) < off + len) {
3616                 rc = inode_newsize_ok(inode, off + len);
3617                 if (rc)
3618                         goto out;
3619
3620                 if (cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)
3621                         smb2_set_sparse(xid, tcon, cfile, inode, false);
3622
3623                 eof = cpu_to_le64(off + len);
3624                 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3625                                   cfile->fid.volatile_fid, cfile->pid, &eof);
3626                 if (rc == 0) {
3627                         cifsi->server_eof = off + len;
3628                         cifs_setsize(inode, off + len);
3629                         cifs_truncate_page(inode->i_mapping, inode->i_size);
3630                         truncate_setsize(inode, off + len);
3631                 }
3632                 goto out;
3633         }
3634
3635         /*
3636          * Files are non-sparse by default so falloc may be a no-op
3637          * Must check if file sparse. If not sparse, and since we are not
3638          * extending then no need to do anything since file already allocated
3639          */
3640         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
3641                 rc = 0;
3642                 goto out;
3643         }
3644
3645         if (keep_size == true) {
3646                 /*
3647                  * We can not preallocate pages beyond the end of the file
3648                  * in SMB2
3649                  */
3650                 if (off >= i_size_read(inode)) {
3651                         rc = 0;
3652                         goto out;
3653                 }
3654                 /*
3655                  * For fallocates that are partially beyond the end of file,
3656                  * clamp len so we only fallocate up to the end of file.
3657                  */
3658                 if (off + len > i_size_read(inode)) {
3659                         len = i_size_read(inode) - off;
3660                 }
3661         }
3662
3663         if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
3664                 /*
3665                  * At this point, we are trying to fallocate an internal
3666                  * regions of a sparse file. Since smb2 does not have a
3667                  * fallocate command we have two otions on how to emulate this.
3668                  * We can either turn the entire file to become non-sparse
3669                  * which we only do if the fallocate is for virtually
3670                  * the whole file,  or we can overwrite the region with zeroes
3671                  * using SMB2_write, which could be prohibitevly expensive
3672                  * if len is large.
3673                  */
3674                 /*
3675                  * We are only trying to fallocate a small region so
3676                  * just write it with zero.
3677                  */
3678                 if (len <= 1024 * 1024) {
3679                         rc = smb3_simple_fallocate_range(xid, tcon, cfile,
3680                                                          off, len);
3681                         goto out;
3682                 }
3683
3684                 /*
3685                  * Check if falloc starts within first few pages of file
3686                  * and ends within a few pages of the end of file to
3687                  * ensure that most of file is being forced to be
3688                  * fallocated now. If so then setting whole file sparse
3689                  * ie potentially making a few extra pages at the beginning
3690                  * or end of the file non-sparse via set_sparse is harmless.
3691                  */
3692                 if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) {
3693                         rc = -EOPNOTSUPP;
3694                         goto out;
3695                 }
3696         }
3697
3698         smb2_set_sparse(xid, tcon, cfile, inode, false);
3699         rc = 0;
3700
3701 out:
3702         if (rc)
3703                 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid,
3704                                 tcon->ses->Suid, off, len, rc);
3705         else
3706                 trace_smb3_falloc_done(xid, cfile->fid.persistent_fid, tcon->tid,
3707                                 tcon->ses->Suid, off, len);
3708
3709         free_xid(xid);
3710         return rc;
3711 }
3712
3713 static long smb3_collapse_range(struct file *file, struct cifs_tcon *tcon,
3714                             loff_t off, loff_t len)
3715 {
3716         int rc;
3717         unsigned int xid;
3718         struct inode *inode = file_inode(file);
3719         struct cifsFileInfo *cfile = file->private_data;
3720         struct cifsInodeInfo *cifsi = CIFS_I(inode);
3721         __le64 eof;
3722         loff_t old_eof;
3723
3724         xid = get_xid();
3725
3726         inode_lock(inode);
3727
3728         old_eof = i_size_read(inode);
3729         if ((off >= old_eof) ||
3730             off + len >= old_eof) {
3731                 rc = -EINVAL;
3732                 goto out;
3733         }
3734
3735         filemap_invalidate_lock(inode->i_mapping);
3736         rc = filemap_write_and_wait_range(inode->i_mapping, off, old_eof - 1);
3737         if (rc < 0)
3738                 goto out_2;
3739
3740         truncate_pagecache_range(inode, off, old_eof);
3741
3742         rc = smb2_copychunk_range(xid, cfile, cfile, off + len,
3743                                   old_eof - off - len, off);
3744         if (rc < 0)
3745                 goto out_2;
3746
3747         eof = cpu_to_le64(old_eof - len);
3748         rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3749                           cfile->fid.volatile_fid, cfile->pid, &eof);
3750         if (rc < 0)
3751                 goto out_2;
3752
3753         rc = 0;
3754
3755         cifsi->server_eof = i_size_read(inode) - len;
3756         truncate_setsize(inode, cifsi->server_eof);
3757         fscache_resize_cookie(cifs_inode_cookie(inode), cifsi->server_eof);
3758 out_2:
3759         filemap_invalidate_unlock(inode->i_mapping);
3760  out:
3761         inode_unlock(inode);
3762         free_xid(xid);
3763         return rc;
3764 }
3765
3766 static long smb3_insert_range(struct file *file, struct cifs_tcon *tcon,
3767                               loff_t off, loff_t len)
3768 {
3769         int rc;
3770         unsigned int xid;
3771         struct cifsFileInfo *cfile = file->private_data;
3772         struct inode *inode = file_inode(file);
3773         __le64 eof;
3774         __u64  count, old_eof;
3775
3776         xid = get_xid();
3777
3778         inode_lock(inode);
3779
3780         old_eof = i_size_read(inode);
3781         if (off >= old_eof) {
3782                 rc = -EINVAL;
3783                 goto out;
3784         }
3785
3786         count = old_eof - off;
3787         eof = cpu_to_le64(old_eof + len);
3788
3789         filemap_invalidate_lock(inode->i_mapping);
3790         rc = filemap_write_and_wait_range(inode->i_mapping, off, old_eof + len - 1);
3791         if (rc < 0)
3792                 goto out_2;
3793         truncate_pagecache_range(inode, off, old_eof);
3794
3795         rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3796                           cfile->fid.volatile_fid, cfile->pid, &eof);
3797         if (rc < 0)
3798                 goto out_2;
3799
3800         rc = smb2_copychunk_range(xid, cfile, cfile, off, count, off + len);
3801         if (rc < 0)
3802                 goto out_2;
3803
3804         rc = smb3_zero_data(file, tcon, off, len, xid);
3805         if (rc < 0)
3806                 goto out_2;
3807
3808         rc = 0;
3809 out_2:
3810         filemap_invalidate_unlock(inode->i_mapping);
3811  out:
3812         inode_unlock(inode);
3813         free_xid(xid);
3814         return rc;
3815 }
3816
3817 static loff_t smb3_llseek(struct file *file, struct cifs_tcon *tcon, loff_t offset, int whence)
3818 {
3819         struct cifsFileInfo *wrcfile, *cfile = file->private_data;
3820         struct cifsInodeInfo *cifsi;
3821         struct inode *inode;
3822         int rc = 0;
3823         struct file_allocated_range_buffer in_data, *out_data = NULL;
3824         u32 out_data_len;
3825         unsigned int xid;
3826
3827         if (whence != SEEK_HOLE && whence != SEEK_DATA)
3828                 return generic_file_llseek(file, offset, whence);
3829
3830         inode = d_inode(cfile->dentry);
3831         cifsi = CIFS_I(inode);
3832
3833         if (offset < 0 || offset >= i_size_read(inode))
3834                 return -ENXIO;
3835
3836         xid = get_xid();
3837         /*
3838          * We need to be sure that all dirty pages are written as they
3839          * might fill holes on the server.
3840          * Note that we also MUST flush any written pages since at least
3841          * some servers (Windows2016) will not reflect recent writes in
3842          * QUERY_ALLOCATED_RANGES until SMB2_flush is called.
3843          */
3844         wrcfile = find_writable_file(cifsi, FIND_WR_ANY);
3845         if (wrcfile) {
3846                 filemap_write_and_wait(inode->i_mapping);
3847                 smb2_flush_file(xid, tcon, &wrcfile->fid);
3848                 cifsFileInfo_put(wrcfile);
3849         }
3850
3851         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) {
3852                 if (whence == SEEK_HOLE)
3853                         offset = i_size_read(inode);
3854                 goto lseek_exit;
3855         }
3856
3857         in_data.file_offset = cpu_to_le64(offset);
3858         in_data.length = cpu_to_le64(i_size_read(inode));
3859
3860         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3861                         cfile->fid.volatile_fid,
3862                         FSCTL_QUERY_ALLOCATED_RANGES,
3863                         (char *)&in_data, sizeof(in_data),
3864                         sizeof(struct file_allocated_range_buffer),
3865                         (char **)&out_data, &out_data_len);
3866         if (rc == -E2BIG)
3867                 rc = 0;
3868         if (rc)
3869                 goto lseek_exit;
3870
3871         if (whence == SEEK_HOLE && out_data_len == 0)
3872                 goto lseek_exit;
3873
3874         if (whence == SEEK_DATA && out_data_len == 0) {
3875                 rc = -ENXIO;
3876                 goto lseek_exit;
3877         }
3878
3879         if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3880                 rc = -EINVAL;
3881                 goto lseek_exit;
3882         }
3883         if (whence == SEEK_DATA) {
3884                 offset = le64_to_cpu(out_data->file_offset);
3885                 goto lseek_exit;
3886         }
3887         if (offset < le64_to_cpu(out_data->file_offset))
3888                 goto lseek_exit;
3889
3890         offset = le64_to_cpu(out_data->file_offset) + le64_to_cpu(out_data->length);
3891
3892  lseek_exit:
3893         free_xid(xid);
3894         kfree(out_data);
3895         if (!rc)
3896                 return vfs_setpos(file, offset, inode->i_sb->s_maxbytes);
3897         else
3898                 return rc;
3899 }
3900
3901 static int smb3_fiemap(struct cifs_tcon *tcon,
3902                        struct cifsFileInfo *cfile,
3903                        struct fiemap_extent_info *fei, u64 start, u64 len)
3904 {
3905         unsigned int xid;
3906         struct file_allocated_range_buffer in_data, *out_data;
3907         u32 out_data_len;
3908         int i, num, rc, flags, last_blob;
3909         u64 next;
3910
3911         rc = fiemap_prep(d_inode(cfile->dentry), fei, start, &len, 0);
3912         if (rc)
3913                 return rc;
3914
3915         xid = get_xid();
3916  again:
3917         in_data.file_offset = cpu_to_le64(start);
3918         in_data.length = cpu_to_le64(len);
3919
3920         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3921                         cfile->fid.volatile_fid,
3922                         FSCTL_QUERY_ALLOCATED_RANGES,
3923                         (char *)&in_data, sizeof(in_data),
3924                         1024 * sizeof(struct file_allocated_range_buffer),
3925                         (char **)&out_data, &out_data_len);
3926         if (rc == -E2BIG) {
3927                 last_blob = 0;
3928                 rc = 0;
3929         } else
3930                 last_blob = 1;
3931         if (rc)
3932                 goto out;
3933
3934         if (out_data_len && out_data_len < sizeof(struct file_allocated_range_buffer)) {
3935                 rc = -EINVAL;
3936                 goto out;
3937         }
3938         if (out_data_len % sizeof(struct file_allocated_range_buffer)) {
3939                 rc = -EINVAL;
3940                 goto out;
3941         }
3942
3943         num = out_data_len / sizeof(struct file_allocated_range_buffer);
3944         for (i = 0; i < num; i++) {
3945                 flags = 0;
3946                 if (i == num - 1 && last_blob)
3947                         flags |= FIEMAP_EXTENT_LAST;
3948
3949                 rc = fiemap_fill_next_extent(fei,
3950                                 le64_to_cpu(out_data[i].file_offset),
3951                                 le64_to_cpu(out_data[i].file_offset),
3952                                 le64_to_cpu(out_data[i].length),
3953                                 flags);
3954                 if (rc < 0)
3955                         goto out;
3956                 if (rc == 1) {
3957                         rc = 0;
3958                         goto out;
3959                 }
3960         }
3961
3962         if (!last_blob) {
3963                 next = le64_to_cpu(out_data[num - 1].file_offset) +
3964                   le64_to_cpu(out_data[num - 1].length);
3965                 len = len - (next - start);
3966                 start = next;
3967                 goto again;
3968         }
3969
3970  out:
3971         free_xid(xid);
3972         kfree(out_data);
3973         return rc;
3974 }
3975
3976 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
3977                            loff_t off, loff_t len)
3978 {
3979         /* KEEP_SIZE already checked for by do_fallocate */
3980         if (mode & FALLOC_FL_PUNCH_HOLE)
3981                 return smb3_punch_hole(file, tcon, off, len);
3982         else if (mode & FALLOC_FL_ZERO_RANGE) {
3983                 if (mode & FALLOC_FL_KEEP_SIZE)
3984                         return smb3_zero_range(file, tcon, off, len, true);
3985                 return smb3_zero_range(file, tcon, off, len, false);
3986         } else if (mode == FALLOC_FL_KEEP_SIZE)
3987                 return smb3_simple_falloc(file, tcon, off, len, true);
3988         else if (mode == FALLOC_FL_COLLAPSE_RANGE)
3989                 return smb3_collapse_range(file, tcon, off, len);
3990         else if (mode == FALLOC_FL_INSERT_RANGE)
3991                 return smb3_insert_range(file, tcon, off, len);
3992         else if (mode == 0)
3993                 return smb3_simple_falloc(file, tcon, off, len, false);
3994
3995         return -EOPNOTSUPP;
3996 }
3997
3998 static void
3999 smb2_downgrade_oplock(struct TCP_Server_Info *server,
4000                       struct cifsInodeInfo *cinode, __u32 oplock,
4001                       unsigned int epoch, bool *purge_cache)
4002 {
4003         server->ops->set_oplock_level(cinode, oplock, 0, NULL);
4004 }
4005
4006 static void
4007 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
4008                        unsigned int epoch, bool *purge_cache);
4009
4010 static void
4011 smb3_downgrade_oplock(struct TCP_Server_Info *server,
4012                        struct cifsInodeInfo *cinode, __u32 oplock,
4013                        unsigned int epoch, bool *purge_cache)
4014 {
4015         unsigned int old_state = cinode->oplock;
4016         unsigned int old_epoch = cinode->epoch;
4017         unsigned int new_state;
4018
4019         if (epoch > old_epoch) {
4020                 smb21_set_oplock_level(cinode, oplock, 0, NULL);
4021                 cinode->epoch = epoch;
4022         }
4023
4024         new_state = cinode->oplock;
4025         *purge_cache = false;
4026
4027         if ((old_state & CIFS_CACHE_READ_FLG) != 0 &&
4028             (new_state & CIFS_CACHE_READ_FLG) == 0)
4029                 *purge_cache = true;
4030         else if (old_state == new_state && (epoch - old_epoch > 1))
4031                 *purge_cache = true;
4032 }
4033
4034 static void
4035 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
4036                       unsigned int epoch, bool *purge_cache)
4037 {
4038         oplock &= 0xFF;
4039         cinode->lease_granted = false;
4040         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
4041                 return;
4042         if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
4043                 cinode->oplock = CIFS_CACHE_RHW_FLG;
4044                 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
4045                          &cinode->netfs.inode);
4046         } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
4047                 cinode->oplock = CIFS_CACHE_RW_FLG;
4048                 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
4049                          &cinode->netfs.inode);
4050         } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
4051                 cinode->oplock = CIFS_CACHE_READ_FLG;
4052                 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
4053                          &cinode->netfs.inode);
4054         } else
4055                 cinode->oplock = 0;
4056 }
4057
4058 static void
4059 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
4060                        unsigned int epoch, bool *purge_cache)
4061 {
4062         char message[5] = {0};
4063         unsigned int new_oplock = 0;
4064
4065         oplock &= 0xFF;
4066         cinode->lease_granted = true;
4067         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
4068                 return;
4069
4070         /* Check if the server granted an oplock rather than a lease */
4071         if (oplock & SMB2_OPLOCK_LEVEL_EXCLUSIVE)
4072                 return smb2_set_oplock_level(cinode, oplock, epoch,
4073                                              purge_cache);
4074
4075         if (oplock & SMB2_LEASE_READ_CACHING_HE) {
4076                 new_oplock |= CIFS_CACHE_READ_FLG;
4077                 strcat(message, "R");
4078         }
4079         if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
4080                 new_oplock |= CIFS_CACHE_HANDLE_FLG;
4081                 strcat(message, "H");
4082         }
4083         if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
4084                 new_oplock |= CIFS_CACHE_WRITE_FLG;
4085                 strcat(message, "W");
4086         }
4087         if (!new_oplock)
4088                 strncpy(message, "None", sizeof(message));
4089
4090         cinode->oplock = new_oplock;
4091         cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
4092                  &cinode->netfs.inode);
4093 }
4094
4095 static void
4096 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
4097                       unsigned int epoch, bool *purge_cache)
4098 {
4099         unsigned int old_oplock = cinode->oplock;
4100
4101         smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
4102
4103         if (purge_cache) {
4104                 *purge_cache = false;
4105                 if (old_oplock == CIFS_CACHE_READ_FLG) {
4106                         if (cinode->oplock == CIFS_CACHE_READ_FLG &&
4107                             (epoch - cinode->epoch > 0))
4108                                 *purge_cache = true;
4109                         else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
4110                                  (epoch - cinode->epoch > 1))
4111                                 *purge_cache = true;
4112                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
4113                                  (epoch - cinode->epoch > 1))
4114                                 *purge_cache = true;
4115                         else if (cinode->oplock == 0 &&
4116                                  (epoch - cinode->epoch > 0))
4117                                 *purge_cache = true;
4118                 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
4119                         if (cinode->oplock == CIFS_CACHE_RH_FLG &&
4120                             (epoch - cinode->epoch > 0))
4121                                 *purge_cache = true;
4122                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
4123                                  (epoch - cinode->epoch > 1))
4124                                 *purge_cache = true;
4125                 }
4126                 cinode->epoch = epoch;
4127         }
4128 }
4129
4130 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
4131 static bool
4132 smb2_is_read_op(__u32 oplock)
4133 {
4134         return oplock == SMB2_OPLOCK_LEVEL_II;
4135 }
4136 #endif /* CIFS_ALLOW_INSECURE_LEGACY */
4137
4138 static bool
4139 smb21_is_read_op(__u32 oplock)
4140 {
4141         return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
4142                !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
4143 }
4144
4145 static __le32
4146 map_oplock_to_lease(u8 oplock)
4147 {
4148         if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
4149                 return SMB2_LEASE_WRITE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE;
4150         else if (oplock == SMB2_OPLOCK_LEVEL_II)
4151                 return SMB2_LEASE_READ_CACHING_LE;
4152         else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
4153                 return SMB2_LEASE_HANDLE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE |
4154                        SMB2_LEASE_WRITE_CACHING_LE;
4155         return 0;
4156 }
4157
4158 static char *
4159 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
4160 {
4161         struct create_lease *buf;
4162
4163         buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
4164         if (!buf)
4165                 return NULL;
4166
4167         memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
4168         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
4169
4170         buf->ccontext.DataOffset = cpu_to_le16(offsetof
4171                                         (struct create_lease, lcontext));
4172         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
4173         buf->ccontext.NameOffset = cpu_to_le16(offsetof
4174                                 (struct create_lease, Name));
4175         buf->ccontext.NameLength = cpu_to_le16(4);
4176         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
4177         buf->Name[0] = 'R';
4178         buf->Name[1] = 'q';
4179         buf->Name[2] = 'L';
4180         buf->Name[3] = 's';
4181         return (char *)buf;
4182 }
4183
4184 static char *
4185 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
4186 {
4187         struct create_lease_v2 *buf;
4188
4189         buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
4190         if (!buf)
4191                 return NULL;
4192
4193         memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
4194         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
4195
4196         buf->ccontext.DataOffset = cpu_to_le16(offsetof
4197                                         (struct create_lease_v2, lcontext));
4198         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
4199         buf->ccontext.NameOffset = cpu_to_le16(offsetof
4200                                 (struct create_lease_v2, Name));
4201         buf->ccontext.NameLength = cpu_to_le16(4);
4202         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
4203         buf->Name[0] = 'R';
4204         buf->Name[1] = 'q';
4205         buf->Name[2] = 'L';
4206         buf->Name[3] = 's';
4207         return (char *)buf;
4208 }
4209
4210 static __u8
4211 smb2_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
4212 {
4213         struct create_lease *lc = (struct create_lease *)buf;
4214
4215         *epoch = 0; /* not used */
4216         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE)
4217                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
4218         return le32_to_cpu(lc->lcontext.LeaseState);
4219 }
4220
4221 static __u8
4222 smb3_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
4223 {
4224         struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
4225
4226         *epoch = le16_to_cpu(lc->lcontext.Epoch);
4227         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE)
4228                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
4229         if (lease_key)
4230                 memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE);
4231         return le32_to_cpu(lc->lcontext.LeaseState);
4232 }
4233
4234 static unsigned int
4235 smb2_wp_retry_size(struct inode *inode)
4236 {
4237         return min_t(unsigned int, CIFS_SB(inode->i_sb)->ctx->wsize,
4238                      SMB2_MAX_BUFFER_SIZE);
4239 }
4240
4241 static bool
4242 smb2_dir_needs_close(struct cifsFileInfo *cfile)
4243 {
4244         return !cfile->invalidHandle;
4245 }
4246
4247 static void
4248 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len,
4249                    struct smb_rqst *old_rq, __le16 cipher_type)
4250 {
4251         struct smb2_hdr *shdr =
4252                         (struct smb2_hdr *)old_rq->rq_iov[0].iov_base;
4253
4254         memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
4255         tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
4256         tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
4257         tr_hdr->Flags = cpu_to_le16(0x01);
4258         if ((cipher_type == SMB2_ENCRYPTION_AES128_GCM) ||
4259             (cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4260                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
4261         else
4262                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
4263         memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8);
4264 }
4265
4266 static void *smb2_aead_req_alloc(struct crypto_aead *tfm, const struct smb_rqst *rqst,
4267                                  int num_rqst, const u8 *sig, u8 **iv,
4268                                  struct aead_request **req, struct sg_table *sgt,
4269                                  unsigned int *num_sgs, size_t *sensitive_size)
4270 {
4271         unsigned int req_size = sizeof(**req) + crypto_aead_reqsize(tfm);
4272         unsigned int iv_size = crypto_aead_ivsize(tfm);
4273         unsigned int len;
4274         u8 *p;
4275
4276         *num_sgs = cifs_get_num_sgs(rqst, num_rqst, sig);
4277         if (IS_ERR_VALUE((long)(int)*num_sgs))
4278                 return ERR_PTR(*num_sgs);
4279
4280         len = iv_size;
4281         len += crypto_aead_alignmask(tfm) & ~(crypto_tfm_ctx_alignment() - 1);
4282         len = ALIGN(len, crypto_tfm_ctx_alignment());
4283         len += req_size;
4284         len = ALIGN(len, __alignof__(struct scatterlist));
4285         len += array_size(*num_sgs, sizeof(struct scatterlist));
4286         *sensitive_size = len;
4287
4288         p = kvzalloc(len, GFP_NOFS);
4289         if (!p)
4290                 return ERR_PTR(-ENOMEM);
4291
4292         *iv = (u8 *)PTR_ALIGN(p, crypto_aead_alignmask(tfm) + 1);
4293         *req = (struct aead_request *)PTR_ALIGN(*iv + iv_size,
4294                                                 crypto_tfm_ctx_alignment());
4295         sgt->sgl = (struct scatterlist *)PTR_ALIGN((u8 *)*req + req_size,
4296                                                    __alignof__(struct scatterlist));
4297         return p;
4298 }
4299
4300 static void *smb2_get_aead_req(struct crypto_aead *tfm, struct smb_rqst *rqst,
4301                                int num_rqst, const u8 *sig, u8 **iv,
4302                                struct aead_request **req, struct scatterlist **sgl,
4303                                size_t *sensitive_size)
4304 {
4305         struct sg_table sgtable = {};
4306         unsigned int skip, num_sgs, i, j;
4307         ssize_t rc;
4308         void *p;
4309
4310         p = smb2_aead_req_alloc(tfm, rqst, num_rqst, sig, iv, req, &sgtable,
4311                                 &num_sgs, sensitive_size);
4312         if (IS_ERR(p))
4313                 return ERR_CAST(p);
4314
4315         sg_init_marker(sgtable.sgl, num_sgs);
4316
4317         /*
4318          * The first rqst has a transform header where the
4319          * first 20 bytes are not part of the encrypted blob.
4320          */
4321         skip = 20;
4322
4323         for (i = 0; i < num_rqst; i++) {
4324                 struct iov_iter *iter = &rqst[i].rq_iter;
4325                 size_t count = iov_iter_count(iter);
4326
4327                 for (j = 0; j < rqst[i].rq_nvec; j++) {
4328                         cifs_sg_set_buf(&sgtable,
4329                                         rqst[i].rq_iov[j].iov_base + skip,
4330                                         rqst[i].rq_iov[j].iov_len - skip);
4331
4332                         /* See the above comment on the 'skip' assignment */
4333                         skip = 0;
4334                 }
4335                 sgtable.orig_nents = sgtable.nents;
4336
4337                 rc = netfs_extract_iter_to_sg(iter, count, &sgtable,
4338                                               num_sgs - sgtable.nents, 0);
4339                 iov_iter_revert(iter, rc);
4340                 sgtable.orig_nents = sgtable.nents;
4341         }
4342
4343         cifs_sg_set_buf(&sgtable, sig, SMB2_SIGNATURE_SIZE);
4344         sg_mark_end(&sgtable.sgl[sgtable.nents - 1]);
4345         *sgl = sgtable.sgl;
4346         return p;
4347 }
4348
4349 static int
4350 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)
4351 {
4352         struct TCP_Server_Info *pserver;
4353         struct cifs_ses *ses;
4354         u8 *ses_enc_key;
4355
4356         /* If server is a channel, select the primary channel */
4357         pserver = CIFS_SERVER_IS_CHAN(server) ? server->primary_server : server;
4358
4359         spin_lock(&cifs_tcp_ses_lock);
4360         list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) {
4361                 if (ses->Suid == ses_id) {
4362                         spin_lock(&ses->ses_lock);
4363                         ses_enc_key = enc ? ses->smb3encryptionkey :
4364                                 ses->smb3decryptionkey;
4365                         memcpy(key, ses_enc_key, SMB3_ENC_DEC_KEY_SIZE);
4366                         spin_unlock(&ses->ses_lock);
4367                         spin_unlock(&cifs_tcp_ses_lock);
4368                         return 0;
4369                 }
4370         }
4371         spin_unlock(&cifs_tcp_ses_lock);
4372
4373         return -EAGAIN;
4374 }
4375 /*
4376  * Encrypt or decrypt @rqst message. @rqst[0] has the following format:
4377  * iov[0]   - transform header (associate data),
4378  * iov[1-N] - SMB2 header and pages - data to encrypt.
4379  * On success return encrypted data in iov[1-N] and pages, leave iov[0]
4380  * untouched.
4381  */
4382 static int
4383 crypt_message(struct TCP_Server_Info *server, int num_rqst,
4384               struct smb_rqst *rqst, int enc)
4385 {
4386         struct smb2_transform_hdr *tr_hdr =
4387                 (struct smb2_transform_hdr *)rqst[0].rq_iov[0].iov_base;
4388         unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20;
4389         int rc = 0;
4390         struct scatterlist *sg;
4391         u8 sign[SMB2_SIGNATURE_SIZE] = {};
4392         u8 key[SMB3_ENC_DEC_KEY_SIZE];
4393         struct aead_request *req;
4394         u8 *iv;
4395         DECLARE_CRYPTO_WAIT(wait);
4396         struct crypto_aead *tfm;
4397         unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
4398         void *creq;
4399         size_t sensitive_size;
4400
4401         rc = smb2_get_enc_key(server, le64_to_cpu(tr_hdr->SessionId), enc, key);
4402         if (rc) {
4403                 cifs_server_dbg(VFS, "%s: Could not get %scryption key\n", __func__,
4404                          enc ? "en" : "de");
4405                 return rc;
4406         }
4407
4408         rc = smb3_crypto_aead_allocate(server);
4409         if (rc) {
4410                 cifs_server_dbg(VFS, "%s: crypto alloc failed\n", __func__);
4411                 return rc;
4412         }
4413
4414         tfm = enc ? server->secmech.enc : server->secmech.dec;
4415
4416         if ((server->cipher_type == SMB2_ENCRYPTION_AES256_CCM) ||
4417                 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4418                 rc = crypto_aead_setkey(tfm, key, SMB3_GCM256_CRYPTKEY_SIZE);
4419         else
4420                 rc = crypto_aead_setkey(tfm, key, SMB3_GCM128_CRYPTKEY_SIZE);
4421
4422         if (rc) {
4423                 cifs_server_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc);
4424                 return rc;
4425         }
4426
4427         rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE);
4428         if (rc) {
4429                 cifs_server_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc);
4430                 return rc;
4431         }
4432
4433         creq = smb2_get_aead_req(tfm, rqst, num_rqst, sign, &iv, &req, &sg,
4434                                  &sensitive_size);
4435         if (IS_ERR(creq))
4436                 return PTR_ERR(creq);
4437
4438         if (!enc) {
4439                 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE);
4440                 crypt_len += SMB2_SIGNATURE_SIZE;
4441         }
4442
4443         if ((server->cipher_type == SMB2_ENCRYPTION_AES128_GCM) ||
4444             (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4445                 memcpy(iv, (char *)tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
4446         else {
4447                 iv[0] = 3;
4448                 memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
4449         }
4450
4451         aead_request_set_tfm(req, tfm);
4452         aead_request_set_crypt(req, sg, sg, crypt_len, iv);
4453         aead_request_set_ad(req, assoc_data_len);
4454
4455         aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
4456                                   crypto_req_done, &wait);
4457
4458         rc = crypto_wait_req(enc ? crypto_aead_encrypt(req)
4459                                 : crypto_aead_decrypt(req), &wait);
4460
4461         if (!rc && enc)
4462                 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE);
4463
4464         kvfree_sensitive(creq, sensitive_size);
4465         return rc;
4466 }
4467
4468 /*
4469  * Clear a read buffer, discarding the folios which have XA_MARK_0 set.
4470  */
4471 static void cifs_clear_xarray_buffer(struct xarray *buffer)
4472 {
4473         struct folio *folio;
4474
4475         XA_STATE(xas, buffer, 0);
4476
4477         rcu_read_lock();
4478         xas_for_each_marked(&xas, folio, ULONG_MAX, XA_MARK_0) {
4479                 folio_put(folio);
4480         }
4481         rcu_read_unlock();
4482         xa_destroy(buffer);
4483 }
4484
4485 void
4486 smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst)
4487 {
4488         int i;
4489
4490         for (i = 0; i < num_rqst; i++)
4491                 if (!xa_empty(&rqst[i].rq_buffer))
4492                         cifs_clear_xarray_buffer(&rqst[i].rq_buffer);
4493 }
4494
4495 /*
4496  * This function will initialize new_rq and encrypt the content.
4497  * The first entry, new_rq[0], only contains a single iov which contains
4498  * a smb2_transform_hdr and is pre-allocated by the caller.
4499  * This function then populates new_rq[1+] with the content from olq_rq[0+].
4500  *
4501  * The end result is an array of smb_rqst structures where the first structure
4502  * only contains a single iov for the transform header which we then can pass
4503  * to crypt_message().
4504  *
4505  * new_rq[0].rq_iov[0] :  smb2_transform_hdr pre-allocated by the caller
4506  * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests
4507  */
4508 static int
4509 smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst,
4510                        struct smb_rqst *new_rq, struct smb_rqst *old_rq)
4511 {
4512         struct smb2_transform_hdr *tr_hdr = new_rq[0].rq_iov[0].iov_base;
4513         struct page *page;
4514         unsigned int orig_len = 0;
4515         int i, j;
4516         int rc = -ENOMEM;
4517
4518         for (i = 1; i < num_rqst; i++) {
4519                 struct smb_rqst *old = &old_rq[i - 1];
4520                 struct smb_rqst *new = &new_rq[i];
4521                 struct xarray *buffer = &new->rq_buffer;
4522                 size_t size = iov_iter_count(&old->rq_iter), seg, copied = 0;
4523
4524                 orig_len += smb_rqst_len(server, old);
4525                 new->rq_iov = old->rq_iov;
4526                 new->rq_nvec = old->rq_nvec;
4527
4528                 xa_init(buffer);
4529
4530                 if (size > 0) {
4531                         unsigned int npages = DIV_ROUND_UP(size, PAGE_SIZE);
4532
4533                         for (j = 0; j < npages; j++) {
4534                                 void *o;
4535
4536                                 rc = -ENOMEM;
4537                                 page = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
4538                                 if (!page)
4539                                         goto err_free;
4540                                 page->index = j;
4541                                 o = xa_store(buffer, j, page, GFP_KERNEL);
4542                                 if (xa_is_err(o)) {
4543                                         rc = xa_err(o);
4544                                         put_page(page);
4545                                         goto err_free;
4546                                 }
4547
4548                                 xa_set_mark(buffer, j, XA_MARK_0);
4549
4550                                 seg = min_t(size_t, size - copied, PAGE_SIZE);
4551                                 if (copy_page_from_iter(page, 0, seg, &old->rq_iter) != seg) {
4552                                         rc = -EFAULT;
4553                                         goto err_free;
4554                                 }
4555                                 copied += seg;
4556                         }
4557                         iov_iter_xarray(&new->rq_iter, ITER_SOURCE,
4558                                         buffer, 0, size);
4559                         new->rq_iter_size = size;
4560                 }
4561         }
4562
4563         /* fill the 1st iov with a transform header */
4564         fill_transform_hdr(tr_hdr, orig_len, old_rq, server->cipher_type);
4565
4566         rc = crypt_message(server, num_rqst, new_rq, 1);
4567         cifs_dbg(FYI, "Encrypt message returned %d\n", rc);
4568         if (rc)
4569                 goto err_free;
4570
4571         return rc;
4572
4573 err_free:
4574         smb3_free_compound_rqst(num_rqst - 1, &new_rq[1]);
4575         return rc;
4576 }
4577
4578 static int
4579 smb3_is_transform_hdr(void *buf)
4580 {
4581         struct smb2_transform_hdr *trhdr = buf;
4582
4583         return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
4584 }
4585
4586 static int
4587 decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
4588                  unsigned int buf_data_size, struct iov_iter *iter,
4589                  bool is_offloaded)
4590 {
4591         struct kvec iov[2];
4592         struct smb_rqst rqst = {NULL};
4593         size_t iter_size = 0;
4594         int rc;
4595
4596         iov[0].iov_base = buf;
4597         iov[0].iov_len = sizeof(struct smb2_transform_hdr);
4598         iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr);
4599         iov[1].iov_len = buf_data_size;
4600
4601         rqst.rq_iov = iov;
4602         rqst.rq_nvec = 2;
4603         if (iter) {
4604                 rqst.rq_iter = *iter;
4605                 rqst.rq_iter_size = iov_iter_count(iter);
4606                 iter_size = iov_iter_count(iter);
4607         }
4608
4609         rc = crypt_message(server, 1, &rqst, 0);
4610         cifs_dbg(FYI, "Decrypt message returned %d\n", rc);
4611
4612         if (rc)
4613                 return rc;
4614
4615         memmove(buf, iov[1].iov_base, buf_data_size);
4616
4617         if (!is_offloaded)
4618                 server->total_read = buf_data_size + iter_size;
4619
4620         return rc;
4621 }
4622
4623 static int
4624 cifs_copy_pages_to_iter(struct xarray *pages, unsigned int data_size,
4625                         unsigned int skip, struct iov_iter *iter)
4626 {
4627         struct page *page;
4628         unsigned long index;
4629
4630         xa_for_each(pages, index, page) {
4631                 size_t n, len = min_t(unsigned int, PAGE_SIZE - skip, data_size);
4632
4633                 n = copy_page_to_iter(page, skip, len, iter);
4634                 if (n != len) {
4635                         cifs_dbg(VFS, "%s: something went wrong\n", __func__);
4636                         return -EIO;
4637                 }
4638                 data_size -= n;
4639                 skip = 0;
4640         }
4641
4642         return 0;
4643 }
4644
4645 static int
4646 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
4647                  char *buf, unsigned int buf_len, struct xarray *pages,
4648                  unsigned int pages_len, bool is_offloaded)
4649 {
4650         unsigned int data_offset;
4651         unsigned int data_len;
4652         unsigned int cur_off;
4653         unsigned int cur_page_idx;
4654         unsigned int pad_len;
4655         struct cifs_readdata *rdata = mid->callback_data;
4656         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
4657         int length;
4658         bool use_rdma_mr = false;
4659
4660         if (shdr->Command != SMB2_READ) {
4661                 cifs_server_dbg(VFS, "only big read responses are supported\n");
4662                 return -ENOTSUPP;
4663         }
4664
4665         if (server->ops->is_session_expired &&
4666             server->ops->is_session_expired(buf)) {
4667                 if (!is_offloaded)
4668                         cifs_reconnect(server, true);
4669                 return -1;
4670         }
4671
4672         if (server->ops->is_status_pending &&
4673                         server->ops->is_status_pending(buf, server))
4674                 return -1;
4675
4676         /* set up first two iov to get credits */
4677         rdata->iov[0].iov_base = buf;
4678         rdata->iov[0].iov_len = 0;
4679         rdata->iov[1].iov_base = buf;
4680         rdata->iov[1].iov_len =
4681                 min_t(unsigned int, buf_len, server->vals->read_rsp_size);
4682         cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
4683                  rdata->iov[0].iov_base, rdata->iov[0].iov_len);
4684         cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n",
4685                  rdata->iov[1].iov_base, rdata->iov[1].iov_len);
4686
4687         rdata->result = server->ops->map_error(buf, true);
4688         if (rdata->result != 0) {
4689                 cifs_dbg(FYI, "%s: server returned error %d\n",
4690                          __func__, rdata->result);
4691                 /* normal error on read response */
4692                 if (is_offloaded)
4693                         mid->mid_state = MID_RESPONSE_RECEIVED;
4694                 else
4695                         dequeue_mid(mid, false);
4696                 return 0;
4697         }
4698
4699         data_offset = server->ops->read_data_offset(buf);
4700 #ifdef CONFIG_CIFS_SMB_DIRECT
4701         use_rdma_mr = rdata->mr;
4702 #endif
4703         data_len = server->ops->read_data_length(buf, use_rdma_mr);
4704
4705         if (data_offset < server->vals->read_rsp_size) {
4706                 /*
4707                  * win2k8 sometimes sends an offset of 0 when the read
4708                  * is beyond the EOF. Treat it as if the data starts just after
4709                  * the header.
4710                  */
4711                 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n",
4712                          __func__, data_offset);
4713                 data_offset = server->vals->read_rsp_size;
4714         } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) {
4715                 /* data_offset is beyond the end of smallbuf */
4716                 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n",
4717                          __func__, data_offset);
4718                 rdata->result = -EIO;
4719                 if (is_offloaded)
4720                         mid->mid_state = MID_RESPONSE_MALFORMED;
4721                 else
4722                         dequeue_mid(mid, rdata->result);
4723                 return 0;
4724         }
4725
4726         pad_len = data_offset - server->vals->read_rsp_size;
4727
4728         if (buf_len <= data_offset) {
4729                 /* read response payload is in pages */
4730                 cur_page_idx = pad_len / PAGE_SIZE;
4731                 cur_off = pad_len % PAGE_SIZE;
4732
4733                 if (cur_page_idx != 0) {
4734                         /* data offset is beyond the 1st page of response */
4735                         cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n",
4736                                  __func__, data_offset);
4737                         rdata->result = -EIO;
4738                         if (is_offloaded)
4739                                 mid->mid_state = MID_RESPONSE_MALFORMED;
4740                         else
4741                                 dequeue_mid(mid, rdata->result);
4742                         return 0;
4743                 }
4744
4745                 if (data_len > pages_len - pad_len) {
4746                         /* data_len is corrupt -- discard frame */
4747                         rdata->result = -EIO;
4748                         if (is_offloaded)
4749                                 mid->mid_state = MID_RESPONSE_MALFORMED;
4750                         else
4751                                 dequeue_mid(mid, rdata->result);
4752                         return 0;
4753                 }
4754
4755                 /* Copy the data to the output I/O iterator. */
4756                 rdata->result = cifs_copy_pages_to_iter(pages, pages_len,
4757                                                         cur_off, &rdata->iter);
4758                 if (rdata->result != 0) {
4759                         if (is_offloaded)
4760                                 mid->mid_state = MID_RESPONSE_MALFORMED;
4761                         else
4762                                 dequeue_mid(mid, rdata->result);
4763                         return 0;
4764                 }
4765                 rdata->got_bytes = pages_len;
4766
4767         } else if (buf_len >= data_offset + data_len) {
4768                 /* read response payload is in buf */
4769                 WARN_ONCE(pages && !xa_empty(pages),
4770                           "read data can be either in buf or in pages");
4771                 length = copy_to_iter(buf + data_offset, data_len, &rdata->iter);
4772                 if (length < 0)
4773                         return length;
4774                 rdata->got_bytes = data_len;
4775         } else {
4776                 /* read response payload cannot be in both buf and pages */
4777                 WARN_ONCE(1, "buf can not contain only a part of read data");
4778                 rdata->result = -EIO;
4779                 if (is_offloaded)
4780                         mid->mid_state = MID_RESPONSE_MALFORMED;
4781                 else
4782                         dequeue_mid(mid, rdata->result);
4783                 return 0;
4784         }
4785
4786         if (is_offloaded)
4787                 mid->mid_state = MID_RESPONSE_RECEIVED;
4788         else
4789                 dequeue_mid(mid, false);
4790         return 0;
4791 }
4792
4793 struct smb2_decrypt_work {
4794         struct work_struct decrypt;
4795         struct TCP_Server_Info *server;
4796         struct xarray buffer;
4797         char *buf;
4798         unsigned int len;
4799 };
4800
4801
4802 static void smb2_decrypt_offload(struct work_struct *work)
4803 {
4804         struct smb2_decrypt_work *dw = container_of(work,
4805                                 struct smb2_decrypt_work, decrypt);
4806         int rc;
4807         struct mid_q_entry *mid;
4808         struct iov_iter iter;
4809
4810         iov_iter_xarray(&iter, ITER_DEST, &dw->buffer, 0, dw->len);
4811         rc = decrypt_raw_data(dw->server, dw->buf, dw->server->vals->read_rsp_size,
4812                               &iter, true);
4813         if (rc) {
4814                 cifs_dbg(VFS, "error decrypting rc=%d\n", rc);
4815                 goto free_pages;
4816         }
4817
4818         dw->server->lstrp = jiffies;
4819         mid = smb2_find_dequeue_mid(dw->server, dw->buf);
4820         if (mid == NULL)
4821                 cifs_dbg(FYI, "mid not found\n");
4822         else {
4823                 mid->decrypted = true;
4824                 rc = handle_read_data(dw->server, mid, dw->buf,
4825                                       dw->server->vals->read_rsp_size,
4826                                       &dw->buffer, dw->len,
4827                                       true);
4828                 if (rc >= 0) {
4829 #ifdef CONFIG_CIFS_STATS2
4830                         mid->when_received = jiffies;
4831 #endif
4832                         if (dw->server->ops->is_network_name_deleted)
4833                                 dw->server->ops->is_network_name_deleted(dw->buf,
4834                                                                          dw->server);
4835
4836                         mid->callback(mid);
4837                 } else {
4838                         spin_lock(&dw->server->srv_lock);
4839                         if (dw->server->tcpStatus == CifsNeedReconnect) {
4840                                 spin_lock(&dw->server->mid_lock);
4841                                 mid->mid_state = MID_RETRY_NEEDED;
4842                                 spin_unlock(&dw->server->mid_lock);
4843                                 spin_unlock(&dw->server->srv_lock);
4844                                 mid->callback(mid);
4845                         } else {
4846                                 spin_lock(&dw->server->mid_lock);
4847                                 mid->mid_state = MID_REQUEST_SUBMITTED;
4848                                 mid->mid_flags &= ~(MID_DELETED);
4849                                 list_add_tail(&mid->qhead,
4850                                         &dw->server->pending_mid_q);
4851                                 spin_unlock(&dw->server->mid_lock);
4852                                 spin_unlock(&dw->server->srv_lock);
4853                         }
4854                 }
4855                 release_mid(mid);
4856         }
4857
4858 free_pages:
4859         cifs_clear_xarray_buffer(&dw->buffer);
4860         cifs_small_buf_release(dw->buf);
4861         kfree(dw);
4862 }
4863
4864
4865 static int
4866 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid,
4867                        int *num_mids)
4868 {
4869         struct page *page;
4870         char *buf = server->smallbuf;
4871         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
4872         struct iov_iter iter;
4873         unsigned int len, npages;
4874         unsigned int buflen = server->pdu_size;
4875         int rc;
4876         int i = 0;
4877         struct smb2_decrypt_work *dw;
4878
4879         dw = kzalloc(sizeof(struct smb2_decrypt_work), GFP_KERNEL);
4880         if (!dw)
4881                 return -ENOMEM;
4882         xa_init(&dw->buffer);
4883         INIT_WORK(&dw->decrypt, smb2_decrypt_offload);
4884         dw->server = server;
4885
4886         *num_mids = 1;
4887         len = min_t(unsigned int, buflen, server->vals->read_rsp_size +
4888                 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1;
4889
4890         rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len);
4891         if (rc < 0)
4892                 goto free_dw;
4893         server->total_read += rc;
4894
4895         len = le32_to_cpu(tr_hdr->OriginalMessageSize) -
4896                 server->vals->read_rsp_size;
4897         dw->len = len;
4898         npages = DIV_ROUND_UP(len, PAGE_SIZE);
4899
4900         rc = -ENOMEM;
4901         for (; i < npages; i++) {
4902                 void *old;
4903
4904                 page = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
4905                 if (!page)
4906                         goto discard_data;
4907                 page->index = i;
4908                 old = xa_store(&dw->buffer, i, page, GFP_KERNEL);
4909                 if (xa_is_err(old)) {
4910                         rc = xa_err(old);
4911                         put_page(page);
4912                         goto discard_data;
4913                 }
4914                 xa_set_mark(&dw->buffer, i, XA_MARK_0);
4915         }
4916
4917         iov_iter_xarray(&iter, ITER_DEST, &dw->buffer, 0, npages * PAGE_SIZE);
4918
4919         /* Read the data into the buffer and clear excess bufferage. */
4920         rc = cifs_read_iter_from_socket(server, &iter, dw->len);
4921         if (rc < 0)
4922                 goto discard_data;
4923
4924         server->total_read += rc;
4925         if (rc < npages * PAGE_SIZE)
4926                 iov_iter_zero(npages * PAGE_SIZE - rc, &iter);
4927         iov_iter_revert(&iter, npages * PAGE_SIZE);
4928         iov_iter_truncate(&iter, dw->len);
4929
4930         rc = cifs_discard_remaining_data(server);
4931         if (rc)
4932                 goto free_pages;
4933
4934         /*
4935          * For large reads, offload to different thread for better performance,
4936          * use more cores decrypting which can be expensive
4937          */
4938
4939         if ((server->min_offload) && (server->in_flight > 1) &&
4940             (server->pdu_size >= server->min_offload)) {
4941                 dw->buf = server->smallbuf;
4942                 server->smallbuf = (char *)cifs_small_buf_get();
4943
4944                 queue_work(decrypt_wq, &dw->decrypt);
4945                 *num_mids = 0; /* worker thread takes care of finding mid */
4946                 return -1;
4947         }
4948
4949         rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size,
4950                               &iter, false);
4951         if (rc)
4952                 goto free_pages;
4953
4954         *mid = smb2_find_mid(server, buf);
4955         if (*mid == NULL) {
4956                 cifs_dbg(FYI, "mid not found\n");
4957         } else {
4958                 cifs_dbg(FYI, "mid found\n");
4959                 (*mid)->decrypted = true;
4960                 rc = handle_read_data(server, *mid, buf,
4961                                       server->vals->read_rsp_size,
4962                                       &dw->buffer, dw->len, false);
4963                 if (rc >= 0) {
4964                         if (server->ops->is_network_name_deleted) {
4965                                 server->ops->is_network_name_deleted(buf,
4966                                                                 server);
4967                         }
4968                 }
4969         }
4970
4971 free_pages:
4972         cifs_clear_xarray_buffer(&dw->buffer);
4973 free_dw:
4974         kfree(dw);
4975         return rc;
4976 discard_data:
4977         cifs_discard_remaining_data(server);
4978         goto free_pages;
4979 }
4980
4981 static int
4982 receive_encrypted_standard(struct TCP_Server_Info *server,
4983                            struct mid_q_entry **mids, char **bufs,
4984                            int *num_mids)
4985 {
4986         int ret, length;
4987         char *buf = server->smallbuf;
4988         struct smb2_hdr *shdr;
4989         unsigned int pdu_length = server->pdu_size;
4990         unsigned int buf_size;
4991         struct mid_q_entry *mid_entry;
4992         int next_is_large;
4993         char *next_buffer = NULL;
4994
4995         *num_mids = 0;
4996
4997         /* switch to large buffer if too big for a small one */
4998         if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) {
4999                 server->large_buf = true;
5000                 memcpy(server->bigbuf, buf, server->total_read);
5001                 buf = server->bigbuf;
5002         }
5003
5004         /* now read the rest */
5005         length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
5006                                 pdu_length - HEADER_SIZE(server) + 1);
5007         if (length < 0)
5008                 return length;
5009         server->total_read += length;
5010
5011         buf_size = pdu_length - sizeof(struct smb2_transform_hdr);
5012         length = decrypt_raw_data(server, buf, buf_size, NULL, false);
5013         if (length)
5014                 return length;
5015
5016         next_is_large = server->large_buf;
5017 one_more:
5018         shdr = (struct smb2_hdr *)buf;
5019         if (shdr->NextCommand) {
5020                 if (next_is_large)
5021                         next_buffer = (char *)cifs_buf_get();
5022                 else
5023                         next_buffer = (char *)cifs_small_buf_get();
5024                 memcpy(next_buffer,
5025                        buf + le32_to_cpu(shdr->NextCommand),
5026                        pdu_length - le32_to_cpu(shdr->NextCommand));
5027         }
5028
5029         mid_entry = smb2_find_mid(server, buf);
5030         if (mid_entry == NULL)
5031                 cifs_dbg(FYI, "mid not found\n");
5032         else {
5033                 cifs_dbg(FYI, "mid found\n");
5034                 mid_entry->decrypted = true;
5035                 mid_entry->resp_buf_size = server->pdu_size;
5036         }
5037
5038         if (*num_mids >= MAX_COMPOUND) {
5039                 cifs_server_dbg(VFS, "too many PDUs in compound\n");
5040                 return -1;
5041         }
5042         bufs[*num_mids] = buf;
5043         mids[(*num_mids)++] = mid_entry;
5044
5045         if (mid_entry && mid_entry->handle)
5046                 ret = mid_entry->handle(server, mid_entry);
5047         else
5048                 ret = cifs_handle_standard(server, mid_entry);
5049
5050         if (ret == 0 && shdr->NextCommand) {
5051                 pdu_length -= le32_to_cpu(shdr->NextCommand);
5052                 server->large_buf = next_is_large;
5053                 if (next_is_large)
5054                         server->bigbuf = buf = next_buffer;
5055                 else
5056                         server->smallbuf = buf = next_buffer;
5057                 goto one_more;
5058         } else if (ret != 0) {
5059                 /*
5060                  * ret != 0 here means that we didn't get to handle_mid() thus
5061                  * server->smallbuf and server->bigbuf are still valid. We need
5062                  * to free next_buffer because it is not going to be used
5063                  * anywhere.
5064                  */
5065                 if (next_is_large)
5066                         free_rsp_buf(CIFS_LARGE_BUFFER, next_buffer);
5067                 else
5068                         free_rsp_buf(CIFS_SMALL_BUFFER, next_buffer);
5069         }
5070
5071         return ret;
5072 }
5073
5074 static int
5075 smb3_receive_transform(struct TCP_Server_Info *server,
5076                        struct mid_q_entry **mids, char **bufs, int *num_mids)
5077 {
5078         char *buf = server->smallbuf;
5079         unsigned int pdu_length = server->pdu_size;
5080         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
5081         unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
5082
5083         if (pdu_length < sizeof(struct smb2_transform_hdr) +
5084                                                 sizeof(struct smb2_hdr)) {
5085                 cifs_server_dbg(VFS, "Transform message is too small (%u)\n",
5086                          pdu_length);
5087                 cifs_reconnect(server, true);
5088                 return -ECONNABORTED;
5089         }
5090
5091         if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) {
5092                 cifs_server_dbg(VFS, "Transform message is broken\n");
5093                 cifs_reconnect(server, true);
5094                 return -ECONNABORTED;
5095         }
5096
5097         /* TODO: add support for compounds containing READ. */
5098         if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server)) {
5099                 return receive_encrypted_read(server, &mids[0], num_mids);
5100         }
5101
5102         return receive_encrypted_standard(server, mids, bufs, num_mids);
5103 }
5104
5105 int
5106 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid)
5107 {
5108         char *buf = server->large_buf ? server->bigbuf : server->smallbuf;
5109
5110         return handle_read_data(server, mid, buf, server->pdu_size,
5111                                 NULL, 0, false);
5112 }
5113
5114 static int
5115 smb2_next_header(char *buf)
5116 {
5117         struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
5118         struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf;
5119
5120         if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM)
5121                 return sizeof(struct smb2_transform_hdr) +
5122                   le32_to_cpu(t_hdr->OriginalMessageSize);
5123
5124         return le32_to_cpu(hdr->NextCommand);
5125 }
5126
5127 static int
5128 smb2_make_node(unsigned int xid, struct inode *inode,
5129                struct dentry *dentry, struct cifs_tcon *tcon,
5130                const char *full_path, umode_t mode, dev_t dev)
5131 {
5132         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
5133         int rc = -EPERM;
5134         struct cifs_open_info_data buf = {};
5135         struct cifs_io_parms io_parms = {0};
5136         __u32 oplock = 0;
5137         struct cifs_fid fid;
5138         struct cifs_open_parms oparms;
5139         unsigned int bytes_written;
5140         struct win_dev *pdev;
5141         struct kvec iov[2];
5142
5143         /*
5144          * Check if mounted with mount parm 'sfu' mount parm.
5145          * SFU emulation should work with all servers, but only
5146          * supports block and char device (no socket & fifo),
5147          * and was used by default in earlier versions of Windows
5148          */
5149         if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL))
5150                 return rc;
5151
5152         /*
5153          * TODO: Add ability to create instead via reparse point. Windows (e.g.
5154          * their current NFS server) uses this approach to expose special files
5155          * over SMB2/SMB3 and Samba will do this with SMB3.1.1 POSIX Extensions
5156          */
5157
5158         if (!S_ISCHR(mode) && !S_ISBLK(mode))
5159                 return rc;
5160
5161         cifs_dbg(FYI, "sfu compat create special file\n");
5162
5163         oparms = (struct cifs_open_parms) {
5164                 .tcon = tcon,
5165                 .cifs_sb = cifs_sb,
5166                 .desired_access = GENERIC_WRITE,
5167                 .create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR |
5168                                                       CREATE_OPTION_SPECIAL),
5169                 .disposition = FILE_CREATE,
5170                 .path = full_path,
5171                 .fid = &fid,
5172         };
5173
5174         if (tcon->ses->server->oplocks)
5175                 oplock = REQ_OPLOCK;
5176         else
5177                 oplock = 0;
5178         rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, &buf);
5179         if (rc)
5180                 return rc;
5181
5182         /*
5183          * BB Do not bother to decode buf since no local inode yet to put
5184          * timestamps in, but we can reuse it safely.
5185          */
5186
5187         pdev = (struct win_dev *)&buf.fi;
5188         io_parms.pid = current->tgid;
5189         io_parms.tcon = tcon;
5190         io_parms.offset = 0;
5191         io_parms.length = sizeof(struct win_dev);
5192         iov[1].iov_base = &buf.fi;
5193         iov[1].iov_len = sizeof(struct win_dev);
5194         if (S_ISCHR(mode)) {
5195                 memcpy(pdev->type, "IntxCHR", 8);
5196                 pdev->major = cpu_to_le64(MAJOR(dev));
5197                 pdev->minor = cpu_to_le64(MINOR(dev));
5198                 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
5199                                                         &bytes_written, iov, 1);
5200         } else if (S_ISBLK(mode)) {
5201                 memcpy(pdev->type, "IntxBLK", 8);
5202                 pdev->major = cpu_to_le64(MAJOR(dev));
5203                 pdev->minor = cpu_to_le64(MINOR(dev));
5204                 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
5205                                                         &bytes_written, iov, 1);
5206         }
5207         tcon->ses->server->ops->close(xid, tcon, &fid);
5208         d_drop(dentry);
5209
5210         /* FIXME: add code here to set EAs */
5211
5212         cifs_free_open_info(&buf);
5213         return rc;
5214 }
5215
5216 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
5217 struct smb_version_operations smb20_operations = {
5218         .compare_fids = smb2_compare_fids,
5219         .setup_request = smb2_setup_request,
5220         .setup_async_request = smb2_setup_async_request,
5221         .check_receive = smb2_check_receive,
5222         .add_credits = smb2_add_credits,
5223         .set_credits = smb2_set_credits,
5224         .get_credits_field = smb2_get_credits_field,
5225         .get_credits = smb2_get_credits,
5226         .wait_mtu_credits = cifs_wait_mtu_credits,
5227         .get_next_mid = smb2_get_next_mid,
5228         .revert_current_mid = smb2_revert_current_mid,
5229         .read_data_offset = smb2_read_data_offset,
5230         .read_data_length = smb2_read_data_length,
5231         .map_error = map_smb2_to_linux_error,
5232         .find_mid = smb2_find_mid,
5233         .check_message = smb2_check_message,
5234         .dump_detail = smb2_dump_detail,
5235         .clear_stats = smb2_clear_stats,
5236         .print_stats = smb2_print_stats,
5237         .is_oplock_break = smb2_is_valid_oplock_break,
5238         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5239         .downgrade_oplock = smb2_downgrade_oplock,
5240         .need_neg = smb2_need_neg,
5241         .negotiate = smb2_negotiate,
5242         .negotiate_wsize = smb2_negotiate_wsize,
5243         .negotiate_rsize = smb2_negotiate_rsize,
5244         .sess_setup = SMB2_sess_setup,
5245         .logoff = SMB2_logoff,
5246         .tree_connect = SMB2_tcon,
5247         .tree_disconnect = SMB2_tdis,
5248         .qfs_tcon = smb2_qfs_tcon,
5249         .is_path_accessible = smb2_is_path_accessible,
5250         .can_echo = smb2_can_echo,
5251         .echo = SMB2_echo,
5252         .query_path_info = smb2_query_path_info,
5253         .get_srv_inum = smb2_get_srv_inum,
5254         .query_file_info = smb2_query_file_info,
5255         .set_path_size = smb2_set_path_size,
5256         .set_file_size = smb2_set_file_size,
5257         .set_file_info = smb2_set_file_info,
5258         .set_compression = smb2_set_compression,
5259         .mkdir = smb2_mkdir,
5260         .mkdir_setinfo = smb2_mkdir_setinfo,
5261         .rmdir = smb2_rmdir,
5262         .unlink = smb2_unlink,
5263         .rename = smb2_rename_path,
5264         .create_hardlink = smb2_create_hardlink,
5265         .query_symlink = smb2_query_symlink,
5266         .query_mf_symlink = smb3_query_mf_symlink,
5267         .create_mf_symlink = smb3_create_mf_symlink,
5268         .open = smb2_open_file,
5269         .set_fid = smb2_set_fid,
5270         .close = smb2_close_file,
5271         .flush = smb2_flush_file,
5272         .async_readv = smb2_async_readv,
5273         .async_writev = smb2_async_writev,
5274         .sync_read = smb2_sync_read,
5275         .sync_write = smb2_sync_write,
5276         .query_dir_first = smb2_query_dir_first,
5277         .query_dir_next = smb2_query_dir_next,
5278         .close_dir = smb2_close_dir,
5279         .calc_smb_size = smb2_calc_size,
5280         .is_status_pending = smb2_is_status_pending,
5281         .is_session_expired = smb2_is_session_expired,
5282         .oplock_response = smb2_oplock_response,
5283         .queryfs = smb2_queryfs,
5284         .mand_lock = smb2_mand_lock,
5285         .mand_unlock_range = smb2_unlock_range,
5286         .push_mand_locks = smb2_push_mandatory_locks,
5287         .get_lease_key = smb2_get_lease_key,
5288         .set_lease_key = smb2_set_lease_key,
5289         .new_lease_key = smb2_new_lease_key,
5290         .calc_signature = smb2_calc_signature,
5291         .is_read_op = smb2_is_read_op,
5292         .set_oplock_level = smb2_set_oplock_level,
5293         .create_lease_buf = smb2_create_lease_buf,
5294         .parse_lease_buf = smb2_parse_lease_buf,
5295         .copychunk_range = smb2_copychunk_range,
5296         .wp_retry_size = smb2_wp_retry_size,
5297         .dir_needs_close = smb2_dir_needs_close,
5298         .get_dfs_refer = smb2_get_dfs_refer,
5299         .select_sectype = smb2_select_sectype,
5300 #ifdef CONFIG_CIFS_XATTR
5301         .query_all_EAs = smb2_query_eas,
5302         .set_EA = smb2_set_ea,
5303 #endif /* CIFS_XATTR */
5304         .get_acl = get_smb2_acl,
5305         .get_acl_by_fid = get_smb2_acl_by_fid,
5306         .set_acl = set_smb2_acl,
5307         .next_header = smb2_next_header,
5308         .ioctl_query_info = smb2_ioctl_query_info,
5309         .make_node = smb2_make_node,
5310         .fiemap = smb3_fiemap,
5311         .llseek = smb3_llseek,
5312         .is_status_io_timeout = smb2_is_status_io_timeout,
5313         .is_network_name_deleted = smb2_is_network_name_deleted,
5314 };
5315 #endif /* CIFS_ALLOW_INSECURE_LEGACY */
5316
5317 struct smb_version_operations smb21_operations = {
5318         .compare_fids = smb2_compare_fids,
5319         .setup_request = smb2_setup_request,
5320         .setup_async_request = smb2_setup_async_request,
5321         .check_receive = smb2_check_receive,
5322         .add_credits = smb2_add_credits,
5323         .set_credits = smb2_set_credits,
5324         .get_credits_field = smb2_get_credits_field,
5325         .get_credits = smb2_get_credits,
5326         .wait_mtu_credits = smb2_wait_mtu_credits,
5327         .adjust_credits = smb2_adjust_credits,
5328         .get_next_mid = smb2_get_next_mid,
5329         .revert_current_mid = smb2_revert_current_mid,
5330         .read_data_offset = smb2_read_data_offset,
5331         .read_data_length = smb2_read_data_length,
5332         .map_error = map_smb2_to_linux_error,
5333         .find_mid = smb2_find_mid,
5334         .check_message = smb2_check_message,
5335         .dump_detail = smb2_dump_detail,
5336         .clear_stats = smb2_clear_stats,
5337         .print_stats = smb2_print_stats,
5338         .is_oplock_break = smb2_is_valid_oplock_break,
5339         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5340         .downgrade_oplock = smb2_downgrade_oplock,
5341         .need_neg = smb2_need_neg,
5342         .negotiate = smb2_negotiate,
5343         .negotiate_wsize = smb2_negotiate_wsize,
5344         .negotiate_rsize = smb2_negotiate_rsize,
5345         .sess_setup = SMB2_sess_setup,
5346         .logoff = SMB2_logoff,
5347         .tree_connect = SMB2_tcon,
5348         .tree_disconnect = SMB2_tdis,
5349         .qfs_tcon = smb2_qfs_tcon,
5350         .is_path_accessible = smb2_is_path_accessible,
5351         .can_echo = smb2_can_echo,
5352         .echo = SMB2_echo,
5353         .query_path_info = smb2_query_path_info,
5354         .get_srv_inum = smb2_get_srv_inum,
5355         .query_file_info = smb2_query_file_info,
5356         .set_path_size = smb2_set_path_size,
5357         .set_file_size = smb2_set_file_size,
5358         .set_file_info = smb2_set_file_info,
5359         .set_compression = smb2_set_compression,
5360         .mkdir = smb2_mkdir,
5361         .mkdir_setinfo = smb2_mkdir_setinfo,
5362         .rmdir = smb2_rmdir,
5363         .unlink = smb2_unlink,
5364         .rename = smb2_rename_path,
5365         .create_hardlink = smb2_create_hardlink,
5366         .query_symlink = smb2_query_symlink,
5367         .query_mf_symlink = smb3_query_mf_symlink,
5368         .create_mf_symlink = smb3_create_mf_symlink,
5369         .open = smb2_open_file,
5370         .set_fid = smb2_set_fid,
5371         .close = smb2_close_file,
5372         .flush = smb2_flush_file,
5373         .async_readv = smb2_async_readv,
5374         .async_writev = smb2_async_writev,
5375         .sync_read = smb2_sync_read,
5376         .sync_write = smb2_sync_write,
5377         .query_dir_first = smb2_query_dir_first,
5378         .query_dir_next = smb2_query_dir_next,
5379         .close_dir = smb2_close_dir,
5380         .calc_smb_size = smb2_calc_size,
5381         .is_status_pending = smb2_is_status_pending,
5382         .is_session_expired = smb2_is_session_expired,
5383         .oplock_response = smb2_oplock_response,
5384         .queryfs = smb2_queryfs,
5385         .mand_lock = smb2_mand_lock,
5386         .mand_unlock_range = smb2_unlock_range,
5387         .push_mand_locks = smb2_push_mandatory_locks,
5388         .get_lease_key = smb2_get_lease_key,
5389         .set_lease_key = smb2_set_lease_key,
5390         .new_lease_key = smb2_new_lease_key,
5391         .calc_signature = smb2_calc_signature,
5392         .is_read_op = smb21_is_read_op,
5393         .set_oplock_level = smb21_set_oplock_level,
5394         .create_lease_buf = smb2_create_lease_buf,
5395         .parse_lease_buf = smb2_parse_lease_buf,
5396         .copychunk_range = smb2_copychunk_range,
5397         .wp_retry_size = smb2_wp_retry_size,
5398         .dir_needs_close = smb2_dir_needs_close,
5399         .enum_snapshots = smb3_enum_snapshots,
5400         .notify = smb3_notify,
5401         .get_dfs_refer = smb2_get_dfs_refer,
5402         .select_sectype = smb2_select_sectype,
5403 #ifdef CONFIG_CIFS_XATTR
5404         .query_all_EAs = smb2_query_eas,
5405         .set_EA = smb2_set_ea,
5406 #endif /* CIFS_XATTR */
5407         .get_acl = get_smb2_acl,
5408         .get_acl_by_fid = get_smb2_acl_by_fid,
5409         .set_acl = set_smb2_acl,
5410         .next_header = smb2_next_header,
5411         .ioctl_query_info = smb2_ioctl_query_info,
5412         .make_node = smb2_make_node,
5413         .fiemap = smb3_fiemap,
5414         .llseek = smb3_llseek,
5415         .is_status_io_timeout = smb2_is_status_io_timeout,
5416         .is_network_name_deleted = smb2_is_network_name_deleted,
5417 };
5418
5419 struct smb_version_operations smb30_operations = {
5420         .compare_fids = smb2_compare_fids,
5421         .setup_request = smb2_setup_request,
5422         .setup_async_request = smb2_setup_async_request,
5423         .check_receive = smb2_check_receive,
5424         .add_credits = smb2_add_credits,
5425         .set_credits = smb2_set_credits,
5426         .get_credits_field = smb2_get_credits_field,
5427         .get_credits = smb2_get_credits,
5428         .wait_mtu_credits = smb2_wait_mtu_credits,
5429         .adjust_credits = smb2_adjust_credits,
5430         .get_next_mid = smb2_get_next_mid,
5431         .revert_current_mid = smb2_revert_current_mid,
5432         .read_data_offset = smb2_read_data_offset,
5433         .read_data_length = smb2_read_data_length,
5434         .map_error = map_smb2_to_linux_error,
5435         .find_mid = smb2_find_mid,
5436         .check_message = smb2_check_message,
5437         .dump_detail = smb2_dump_detail,
5438         .clear_stats = smb2_clear_stats,
5439         .print_stats = smb2_print_stats,
5440         .dump_share_caps = smb2_dump_share_caps,
5441         .is_oplock_break = smb2_is_valid_oplock_break,
5442         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5443         .downgrade_oplock = smb3_downgrade_oplock,
5444         .need_neg = smb2_need_neg,
5445         .negotiate = smb2_negotiate,
5446         .negotiate_wsize = smb3_negotiate_wsize,
5447         .negotiate_rsize = smb3_negotiate_rsize,
5448         .sess_setup = SMB2_sess_setup,
5449         .logoff = SMB2_logoff,
5450         .tree_connect = SMB2_tcon,
5451         .tree_disconnect = SMB2_tdis,
5452         .qfs_tcon = smb3_qfs_tcon,
5453         .is_path_accessible = smb2_is_path_accessible,
5454         .can_echo = smb2_can_echo,
5455         .echo = SMB2_echo,
5456         .query_path_info = smb2_query_path_info,
5457         /* WSL tags introduced long after smb2.1, enable for SMB3, 3.11 only */
5458         .query_reparse_tag = smb2_query_reparse_tag,
5459         .get_srv_inum = smb2_get_srv_inum,
5460         .query_file_info = smb2_query_file_info,
5461         .set_path_size = smb2_set_path_size,
5462         .set_file_size = smb2_set_file_size,
5463         .set_file_info = smb2_set_file_info,
5464         .set_compression = smb2_set_compression,
5465         .mkdir = smb2_mkdir,
5466         .mkdir_setinfo = smb2_mkdir_setinfo,
5467         .rmdir = smb2_rmdir,
5468         .unlink = smb2_unlink,
5469         .rename = smb2_rename_path,
5470         .create_hardlink = smb2_create_hardlink,
5471         .query_symlink = smb2_query_symlink,
5472         .query_mf_symlink = smb3_query_mf_symlink,
5473         .create_mf_symlink = smb3_create_mf_symlink,
5474         .open = smb2_open_file,
5475         .set_fid = smb2_set_fid,
5476         .close = smb2_close_file,
5477         .close_getattr = smb2_close_getattr,
5478         .flush = smb2_flush_file,
5479         .async_readv = smb2_async_readv,
5480         .async_writev = smb2_async_writev,
5481         .sync_read = smb2_sync_read,
5482         .sync_write = smb2_sync_write,
5483         .query_dir_first = smb2_query_dir_first,
5484         .query_dir_next = smb2_query_dir_next,
5485         .close_dir = smb2_close_dir,
5486         .calc_smb_size = smb2_calc_size,
5487         .is_status_pending = smb2_is_status_pending,
5488         .is_session_expired = smb2_is_session_expired,
5489         .oplock_response = smb2_oplock_response,
5490         .queryfs = smb2_queryfs,
5491         .mand_lock = smb2_mand_lock,
5492         .mand_unlock_range = smb2_unlock_range,
5493         .push_mand_locks = smb2_push_mandatory_locks,
5494         .get_lease_key = smb2_get_lease_key,
5495         .set_lease_key = smb2_set_lease_key,
5496         .new_lease_key = smb2_new_lease_key,
5497         .generate_signingkey = generate_smb30signingkey,
5498         .calc_signature = smb3_calc_signature,
5499         .set_integrity  = smb3_set_integrity,
5500         .is_read_op = smb21_is_read_op,
5501         .set_oplock_level = smb3_set_oplock_level,
5502         .create_lease_buf = smb3_create_lease_buf,
5503         .parse_lease_buf = smb3_parse_lease_buf,
5504         .copychunk_range = smb2_copychunk_range,
5505         .duplicate_extents = smb2_duplicate_extents,
5506         .validate_negotiate = smb3_validate_negotiate,
5507         .wp_retry_size = smb2_wp_retry_size,
5508         .dir_needs_close = smb2_dir_needs_close,
5509         .fallocate = smb3_fallocate,
5510         .enum_snapshots = smb3_enum_snapshots,
5511         .notify = smb3_notify,
5512         .init_transform_rq = smb3_init_transform_rq,
5513         .is_transform_hdr = smb3_is_transform_hdr,
5514         .receive_transform = smb3_receive_transform,
5515         .get_dfs_refer = smb2_get_dfs_refer,
5516         .select_sectype = smb2_select_sectype,
5517 #ifdef CONFIG_CIFS_XATTR
5518         .query_all_EAs = smb2_query_eas,
5519         .set_EA = smb2_set_ea,
5520 #endif /* CIFS_XATTR */
5521         .get_acl = get_smb2_acl,
5522         .get_acl_by_fid = get_smb2_acl_by_fid,
5523         .set_acl = set_smb2_acl,
5524         .next_header = smb2_next_header,
5525         .ioctl_query_info = smb2_ioctl_query_info,
5526         .make_node = smb2_make_node,
5527         .fiemap = smb3_fiemap,
5528         .llseek = smb3_llseek,
5529         .is_status_io_timeout = smb2_is_status_io_timeout,
5530         .is_network_name_deleted = smb2_is_network_name_deleted,
5531 };
5532
5533 struct smb_version_operations smb311_operations = {
5534         .compare_fids = smb2_compare_fids,
5535         .setup_request = smb2_setup_request,
5536         .setup_async_request = smb2_setup_async_request,
5537         .check_receive = smb2_check_receive,
5538         .add_credits = smb2_add_credits,
5539         .set_credits = smb2_set_credits,
5540         .get_credits_field = smb2_get_credits_field,
5541         .get_credits = smb2_get_credits,
5542         .wait_mtu_credits = smb2_wait_mtu_credits,
5543         .adjust_credits = smb2_adjust_credits,
5544         .get_next_mid = smb2_get_next_mid,
5545         .revert_current_mid = smb2_revert_current_mid,
5546         .read_data_offset = smb2_read_data_offset,
5547         .read_data_length = smb2_read_data_length,
5548         .map_error = map_smb2_to_linux_error,
5549         .find_mid = smb2_find_mid,
5550         .check_message = smb2_check_message,
5551         .dump_detail = smb2_dump_detail,
5552         .clear_stats = smb2_clear_stats,
5553         .print_stats = smb2_print_stats,
5554         .dump_share_caps = smb2_dump_share_caps,
5555         .is_oplock_break = smb2_is_valid_oplock_break,
5556         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5557         .downgrade_oplock = smb3_downgrade_oplock,
5558         .need_neg = smb2_need_neg,
5559         .negotiate = smb2_negotiate,
5560         .negotiate_wsize = smb3_negotiate_wsize,
5561         .negotiate_rsize = smb3_negotiate_rsize,
5562         .sess_setup = SMB2_sess_setup,
5563         .logoff = SMB2_logoff,
5564         .tree_connect = SMB2_tcon,
5565         .tree_disconnect = SMB2_tdis,
5566         .qfs_tcon = smb3_qfs_tcon,
5567         .is_path_accessible = smb2_is_path_accessible,
5568         .can_echo = smb2_can_echo,
5569         .echo = SMB2_echo,
5570         .query_path_info = smb2_query_path_info,
5571         .query_reparse_tag = smb2_query_reparse_tag,
5572         .get_srv_inum = smb2_get_srv_inum,
5573         .query_file_info = smb2_query_file_info,
5574         .set_path_size = smb2_set_path_size,
5575         .set_file_size = smb2_set_file_size,
5576         .set_file_info = smb2_set_file_info,
5577         .set_compression = smb2_set_compression,
5578         .mkdir = smb2_mkdir,
5579         .mkdir_setinfo = smb2_mkdir_setinfo,
5580         .posix_mkdir = smb311_posix_mkdir,
5581         .rmdir = smb2_rmdir,
5582         .unlink = smb2_unlink,
5583         .rename = smb2_rename_path,
5584         .create_hardlink = smb2_create_hardlink,
5585         .query_symlink = smb2_query_symlink,
5586         .query_mf_symlink = smb3_query_mf_symlink,
5587         .create_mf_symlink = smb3_create_mf_symlink,
5588         .open = smb2_open_file,
5589         .set_fid = smb2_set_fid,
5590         .close = smb2_close_file,
5591         .close_getattr = smb2_close_getattr,
5592         .flush = smb2_flush_file,
5593         .async_readv = smb2_async_readv,
5594         .async_writev = smb2_async_writev,
5595         .sync_read = smb2_sync_read,
5596         .sync_write = smb2_sync_write,
5597         .query_dir_first = smb2_query_dir_first,
5598         .query_dir_next = smb2_query_dir_next,
5599         .close_dir = smb2_close_dir,
5600         .calc_smb_size = smb2_calc_size,
5601         .is_status_pending = smb2_is_status_pending,
5602         .is_session_expired = smb2_is_session_expired,
5603         .oplock_response = smb2_oplock_response,
5604         .queryfs = smb311_queryfs,
5605         .mand_lock = smb2_mand_lock,
5606         .mand_unlock_range = smb2_unlock_range,
5607         .push_mand_locks = smb2_push_mandatory_locks,
5608         .get_lease_key = smb2_get_lease_key,
5609         .set_lease_key = smb2_set_lease_key,
5610         .new_lease_key = smb2_new_lease_key,
5611         .generate_signingkey = generate_smb311signingkey,
5612         .calc_signature = smb3_calc_signature,
5613         .set_integrity  = smb3_set_integrity,
5614         .is_read_op = smb21_is_read_op,
5615         .set_oplock_level = smb3_set_oplock_level,
5616         .create_lease_buf = smb3_create_lease_buf,
5617         .parse_lease_buf = smb3_parse_lease_buf,
5618         .copychunk_range = smb2_copychunk_range,
5619         .duplicate_extents = smb2_duplicate_extents,
5620 /*      .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
5621         .wp_retry_size = smb2_wp_retry_size,
5622         .dir_needs_close = smb2_dir_needs_close,
5623         .fallocate = smb3_fallocate,
5624         .enum_snapshots = smb3_enum_snapshots,
5625         .notify = smb3_notify,
5626         .init_transform_rq = smb3_init_transform_rq,
5627         .is_transform_hdr = smb3_is_transform_hdr,
5628         .receive_transform = smb3_receive_transform,
5629         .get_dfs_refer = smb2_get_dfs_refer,
5630         .select_sectype = smb2_select_sectype,
5631 #ifdef CONFIG_CIFS_XATTR
5632         .query_all_EAs = smb2_query_eas,
5633         .set_EA = smb2_set_ea,
5634 #endif /* CIFS_XATTR */
5635         .get_acl = get_smb2_acl,
5636         .get_acl_by_fid = get_smb2_acl_by_fid,
5637         .set_acl = set_smb2_acl,
5638         .next_header = smb2_next_header,
5639         .ioctl_query_info = smb2_ioctl_query_info,
5640         .make_node = smb2_make_node,
5641         .fiemap = smb3_fiemap,
5642         .llseek = smb3_llseek,
5643         .is_status_io_timeout = smb2_is_status_io_timeout,
5644         .is_network_name_deleted = smb2_is_network_name_deleted,
5645 };
5646
5647 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
5648 struct smb_version_values smb20_values = {
5649         .version_string = SMB20_VERSION_STRING,
5650         .protocol_id = SMB20_PROT_ID,
5651         .req_capabilities = 0, /* MBZ */
5652         .large_lock_type = 0,
5653         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5654         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5655         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5656         .header_size = sizeof(struct smb2_hdr),
5657         .header_preamble_size = 0,
5658         .max_header_size = MAX_SMB2_HDR_SIZE,
5659         .read_rsp_size = sizeof(struct smb2_read_rsp),
5660         .lock_cmd = SMB2_LOCK,
5661         .cap_unix = 0,
5662         .cap_nt_find = SMB2_NT_FIND,
5663         .cap_large_files = SMB2_LARGE_FILES,
5664         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5665         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5666         .create_lease_size = sizeof(struct create_lease),
5667 };
5668 #endif /* ALLOW_INSECURE_LEGACY */
5669
5670 struct smb_version_values smb21_values = {
5671         .version_string = SMB21_VERSION_STRING,
5672         .protocol_id = SMB21_PROT_ID,
5673         .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
5674         .large_lock_type = 0,
5675         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5676         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5677         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5678         .header_size = sizeof(struct smb2_hdr),
5679         .header_preamble_size = 0,
5680         .max_header_size = MAX_SMB2_HDR_SIZE,
5681         .read_rsp_size = sizeof(struct smb2_read_rsp),
5682         .lock_cmd = SMB2_LOCK,
5683         .cap_unix = 0,
5684         .cap_nt_find = SMB2_NT_FIND,
5685         .cap_large_files = SMB2_LARGE_FILES,
5686         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5687         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5688         .create_lease_size = sizeof(struct create_lease),
5689 };
5690
5691 struct smb_version_values smb3any_values = {
5692         .version_string = SMB3ANY_VERSION_STRING,
5693         .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
5694         .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,
5695         .large_lock_type = 0,
5696         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5697         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5698         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5699         .header_size = sizeof(struct smb2_hdr),
5700         .header_preamble_size = 0,
5701         .max_header_size = MAX_SMB2_HDR_SIZE,
5702         .read_rsp_size = sizeof(struct smb2_read_rsp),
5703         .lock_cmd = SMB2_LOCK,
5704         .cap_unix = 0,
5705         .cap_nt_find = SMB2_NT_FIND,
5706         .cap_large_files = SMB2_LARGE_FILES,
5707         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5708         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5709         .create_lease_size = sizeof(struct create_lease_v2),
5710 };
5711
5712 struct smb_version_values smbdefault_values = {
5713         .version_string = SMBDEFAULT_VERSION_STRING,
5714         .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
5715         .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,
5716         .large_lock_type = 0,
5717         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5718         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5719         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5720         .header_size = sizeof(struct smb2_hdr),
5721         .header_preamble_size = 0,
5722         .max_header_size = MAX_SMB2_HDR_SIZE,
5723         .read_rsp_size = sizeof(struct smb2_read_rsp),
5724         .lock_cmd = SMB2_LOCK,
5725         .cap_unix = 0,
5726         .cap_nt_find = SMB2_NT_FIND,
5727         .cap_large_files = SMB2_LARGE_FILES,
5728         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5729         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5730         .create_lease_size = sizeof(struct create_lease_v2),
5731 };
5732
5733 struct smb_version_values smb30_values = {
5734         .version_string = SMB30_VERSION_STRING,
5735         .protocol_id = SMB30_PROT_ID,
5736         .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,
5737         .large_lock_type = 0,
5738         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5739         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5740         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5741         .header_size = sizeof(struct smb2_hdr),
5742         .header_preamble_size = 0,
5743         .max_header_size = MAX_SMB2_HDR_SIZE,
5744         .read_rsp_size = sizeof(struct smb2_read_rsp),
5745         .lock_cmd = SMB2_LOCK,
5746         .cap_unix = 0,
5747         .cap_nt_find = SMB2_NT_FIND,
5748         .cap_large_files = SMB2_LARGE_FILES,
5749         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5750         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5751         .create_lease_size = sizeof(struct create_lease_v2),
5752 };
5753
5754 struct smb_version_values smb302_values = {
5755         .version_string = SMB302_VERSION_STRING,
5756         .protocol_id = SMB302_PROT_ID,
5757         .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,
5758         .large_lock_type = 0,
5759         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5760         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5761         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5762         .header_size = sizeof(struct smb2_hdr),
5763         .header_preamble_size = 0,
5764         .max_header_size = MAX_SMB2_HDR_SIZE,
5765         .read_rsp_size = sizeof(struct smb2_read_rsp),
5766         .lock_cmd = SMB2_LOCK,
5767         .cap_unix = 0,
5768         .cap_nt_find = SMB2_NT_FIND,
5769         .cap_large_files = SMB2_LARGE_FILES,
5770         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5771         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5772         .create_lease_size = sizeof(struct create_lease_v2),
5773 };
5774
5775 struct smb_version_values smb311_values = {
5776         .version_string = SMB311_VERSION_STRING,
5777         .protocol_id = SMB311_PROT_ID,
5778         .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,
5779         .large_lock_type = 0,
5780         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5781         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5782         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5783         .header_size = sizeof(struct smb2_hdr),
5784         .header_preamble_size = 0,
5785         .max_header_size = MAX_SMB2_HDR_SIZE,
5786         .read_rsp_size = sizeof(struct smb2_read_rsp),
5787         .lock_cmd = SMB2_LOCK,
5788         .cap_unix = 0,
5789         .cap_nt_find = SMB2_NT_FIND,
5790         .cap_large_files = SMB2_LARGE_FILES,
5791         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5792         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5793         .create_lease_size = sizeof(struct create_lease_v2),
5794 };