fs/smb/client/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         if (server->credits > server->max_credits)
  38                 server->credits = server->max_credits;
  39         server->oplock_credits = server->echo_credits = 0;
  40         switch (server->credits) {
  41         case 0:
  42                 return 0;
  43         case 1:
  44                 server->echoes = false;
  45                 server->oplocks = false;
  46                 break;
  47         case 2:
  48                 server->echoes = true;
  49                 server->oplocks = false;
  50                 server->echo_credits = 1;
  51                 break;
  52         default:
  53                 server->echoes = true;
  54                 if (enable_oplocks) {
  55                         server->oplocks = true;
  56                         server->oplock_credits = 1;
  57                 } else
  58                         server->oplocks = false;
  59
  60                 server->echo_credits = 1;
  61         }
  62         server->credits -= server->echo_credits + server->oplock_credits;
  63         return server->credits + server->echo_credits + server->oplock_credits;
  64 }
  65
  66 static void
  67 smb2_add_credits(struct TCP_Server_Info *server,
  68                  const struct cifs_credits *credits, const int optype)
  69 {
  70         int *val, rc = -1;
  71         int scredits, in_flight;
  72         unsigned int add = credits->value;
  73         unsigned int instance = credits->instance;
  74         bool reconnect_detected = false;
  75         bool reconnect_with_invalid_credits = false;
  76
  77         spin_lock(&server->req_lock);
  78         val = server->ops->get_credits_field(server, optype);
  79
  80         /* eg found case where write overlapping reconnect messed up credits */
  81         if (((optype & CIFS_OP_MASK) == CIFS_NEG_OP) && (*val != 0))
  82                 reconnect_with_invalid_credits = true;
  83
  84         if ((instance == 0) || (instance == server->reconnect_instance))
  85                 *val += add;
  86         else
  87                 reconnect_detected = true;
  88
  89         if (*val > 65000) {
  90                 *val = 65000; /* Don't get near 64K credits, avoid srv bugs */
  91                 pr_warn_once("server overflowed SMB3 credits\n");
  92                 trace_smb3_overflow_credits(server->CurrentMid,
  93                                             server->conn_id, server->hostname, *val,
  94                                             add, server->in_flight);
  95         }
  96         WARN_ON_ONCE(server->in_flight == 0);
  97         server->in_flight--;
  98         if (server->in_flight == 0 &&
  99            ((optype & CIFS_OP_MASK) != CIFS_NEG_OP) &&
 100            ((optype & CIFS_OP_MASK) != CIFS_SESS_OP))
 101                 rc = change_conf(server);
 102         /*
 103          * Sometimes server returns 0 credits on oplock break ack - we need to
 104          * rebalance credits in this case.
 105          */
 106         else if (server->in_flight > 0 && server->oplock_credits == 0 &&
 107                  server->oplocks) {
 108                 if (server->credits > 1) {
 109                         server->credits--;
 110                         server->oplock_credits++;
 111                 }
 112         } else if ((server->in_flight > 0) && (server->oplock_credits > 3) &&
 113                    ((optype & CIFS_OP_MASK) == CIFS_OBREAK_OP))
 114                 /* if now have too many oplock credits, rebalance so don't starve normal ops */
 115                 change_conf(server);
 116
 117         scredits = *val;
 118         in_flight = server->in_flight;
 119         spin_unlock(&server->req_lock);
 120         wake_up(&server->request_q);
 121
 122         if (reconnect_detected) {
 123                 trace_smb3_reconnect_detected(server->CurrentMid,
 124                         server->conn_id, server->hostname, scredits, add, in_flight);
 125
 126                 cifs_dbg(FYI, "trying to put %d credits from the old server instance %d\n",
 127                          add, instance);
 128         }
 129
 130         if (reconnect_with_invalid_credits) {
 131                 trace_smb3_reconnect_with_invalid_credits(server->CurrentMid,
 132                         server->conn_id, server->hostname, scredits, add, in_flight);
 133                 cifs_dbg(FYI, "Negotiate operation when server credits is non-zero. Optype: %d, server credits: %d, credits added: %d\n",
 134                          optype, scredits, add);
 135         }
 136
 137         spin_lock(&server->srv_lock);
 138         if (server->tcpStatus == CifsNeedReconnect
 139             || server->tcpStatus == CifsExiting) {
 140                 spin_unlock(&server->srv_lock);
 141                 return;
 142         }
 143         spin_unlock(&server->srv_lock);
 144
 145         switch (rc) {
 146         case -1:
 147                 /* change_conf hasn't been executed */
 148                 break;
 149         case 0:
 150                 cifs_server_dbg(VFS, "Possible client or server bug - zero credits\n");
 151                 break;
 152         case 1:
 153                 cifs_server_dbg(VFS, "disabling echoes and oplocks\n");
 154                 break;
 155         case 2:
 156                 cifs_dbg(FYI, "disabling oplocks\n");
 157                 break;
 158         default:
 159                 /* change_conf rebalanced credits for different types */
 160                 break;
 161         }
 162
 163         trace_smb3_add_credits(server->CurrentMid,
 164                         server->conn_id, server->hostname, scredits, add, in_flight);
 165         cifs_dbg(FYI, "%s: added %u credits total=%d\n", __func__, add, scredits);
 166 }
 167
 168 static void
 169 smb2_set_credits(struct TCP_Server_Info *server, const int val)
 170 {
 171         int scredits, in_flight;
 172
 173         spin_lock(&server->req_lock);
 174         server->credits = val;
 175         if (val == 1) {
 176                 server->reconnect_instance++;
 177                 /*
 178                  * ChannelSequence updated for all channels in primary channel so that consistent
 179                  * across SMB3 requests sent on any channel. See MS-SMB2 3.2.4.1 and 3.2.7.1
 180                  */
 181                 if (SERVER_IS_CHAN(server))
 182                         server->primary_server->channel_sequence_num++;
 183                 else
 184                         server->channel_sequence_num++;
 185         }
 186         scredits = server->credits;
 187         in_flight = server->in_flight;
 188         spin_unlock(&server->req_lock);
 189
 190         trace_smb3_set_credits(server->CurrentMid,
 191                         server->conn_id, server->hostname, scredits, val, in_flight);
 192         cifs_dbg(FYI, "%s: set %u credits\n", __func__, val);
 193
 194         /* don't log while holding the lock */
 195         if (val == 1)
 196                 cifs_dbg(FYI, "set credits to 1 due to smb2 reconnect\n");
 197 }
 198
 199 static int *
 200 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
 201 {
 202         switch (optype) {
 203         case CIFS_ECHO_OP:
 204                 return &server->echo_credits;
 205         case CIFS_OBREAK_OP:
 206                 return &server->oplock_credits;
 207         default:
 208                 return &server->credits;
 209         }
 210 }
 211
 212 static unsigned int
 213 smb2_get_credits(struct mid_q_entry *mid)
 214 {
 215         return mid->credits_received;
 216 }
 217
 218 static int
 219 smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
 220                       unsigned int *num, struct cifs_credits *credits)
 221 {
 222         int rc = 0;
 223         unsigned int scredits, in_flight;
 224
 225         spin_lock(&server->req_lock);
 226         while (1) {
 227                 spin_unlock(&server->req_lock);
 228
 229                 spin_lock(&server->srv_lock);
 230                 if (server->tcpStatus == CifsExiting) {
 231                         spin_unlock(&server->srv_lock);
 232                         return -ENOENT;
 233                 }
 234                 spin_unlock(&server->srv_lock);
 235
 236                 spin_lock(&server->req_lock);
 237                 if (server->credits <= 0) {
 238                         spin_unlock(&server->req_lock);
 239                         cifs_num_waiters_inc(server);
 240                         rc = wait_event_killable(server->request_q,
 241                                 has_credits(server, &server->credits, 1));
 242                         cifs_num_waiters_dec(server);
 243                         if (rc)
 244                                 return rc;
 245                         spin_lock(&server->req_lock);
 246                 } else {
 247                         scredits = server->credits;
 248                         /* can deadlock with reopen */
 249                         if (scredits <= 8) {
 250                                 *num = SMB2_MAX_BUFFER_SIZE;
 251                                 credits->value = 0;
 252                                 credits->instance = 0;
 253                                 break;
 254                         }
 255
 256                         /* leave some credits for reopen and other ops */
 257                         scredits -= 8;
 258                         *num = min_t(unsigned int, size,
 259                                      scredits * SMB2_MAX_BUFFER_SIZE);
 260
 261                         credits->value =
 262                                 DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE);
 263                         credits->instance = server->reconnect_instance;
 264                         server->credits -= credits->value;
 265                         server->in_flight++;
 266                         if (server->in_flight > server->max_in_flight)
 267                                 server->max_in_flight = server->in_flight;
 268                         break;
 269                 }
 270         }
 271         scredits = server->credits;
 272         in_flight = server->in_flight;
 273         spin_unlock(&server->req_lock);
 274
 275         trace_smb3_wait_credits(server->CurrentMid,
 276                         server->conn_id, server->hostname, scredits, -(credits->value), in_flight);
 277         cifs_dbg(FYI, "%s: removed %u credits total=%d\n",
 278                         __func__, credits->value, scredits);
 279
 280         return rc;
 281 }
 282
 283 static int
 284 smb2_adjust_credits(struct TCP_Server_Info *server,
 285                     struct cifs_credits *credits,
 286                     const unsigned int payload_size)
 287 {
 288         int new_val = DIV_ROUND_UP(payload_size, SMB2_MAX_BUFFER_SIZE);
 289         int scredits, in_flight;
 290
 291         if (!credits->value || credits->value == new_val)
 292                 return 0;
 293
 294         if (credits->value < new_val) {
 295                 trace_smb3_too_many_credits(server->CurrentMid,
 296                                 server->conn_id, server->hostname, 0, credits->value - new_val, 0);
 297                 cifs_server_dbg(VFS, "request has less credits (%d) than required (%d)",
 298                                 credits->value, new_val);
 299
 300                 return -EOPNOTSUPP;
 301         }
 302
 303         spin_lock(&server->req_lock);
 304
 305         if (server->reconnect_instance != credits->instance) {
 306                 scredits = server->credits;
 307                 in_flight = server->in_flight;
 308                 spin_unlock(&server->req_lock);
 309
 310                 trace_smb3_reconnect_detected(server->CurrentMid,
 311                         server->conn_id, server->hostname, scredits,
 312                         credits->value - new_val, in_flight);
 313                 cifs_server_dbg(VFS, "trying to return %d credits to old session\n",
 314                          credits->value - new_val);
 315                 return -EAGAIN;
 316         }
 317
 318         server->credits += credits->value - new_val;
 319         scredits = server->credits;
 320         in_flight = server->in_flight;
 321         spin_unlock(&server->req_lock);
 322         wake_up(&server->request_q);
 323
 324         trace_smb3_adj_credits(server->CurrentMid,
 325                         server->conn_id, server->hostname, scredits,
 326                         credits->value - new_val, in_flight);
 327         cifs_dbg(FYI, "%s: adjust added %u credits total=%d\n",
 328                         __func__, credits->value - new_val, scredits);
 329
 330         credits->value = new_val;
 331
 332         return 0;
 333 }
 334
 335 static __u64
 336 smb2_get_next_mid(struct TCP_Server_Info *server)
 337 {
 338         __u64 mid;
 339         /* for SMB2 we need the current value */
 340         spin_lock(&server->mid_lock);
 341         mid = server->CurrentMid++;
 342         spin_unlock(&server->mid_lock);
 343         return mid;
 344 }
 345
 346 static void
 347 smb2_revert_current_mid(struct TCP_Server_Info *server, const unsigned int val)
 348 {
 349         spin_lock(&server->mid_lock);
 350         if (server->CurrentMid >= val)
 351                 server->CurrentMid -= val;
 352         spin_unlock(&server->mid_lock);
 353 }
 354
 355 static struct mid_q_entry *
 356 __smb2_find_mid(struct TCP_Server_Info *server, char *buf, bool dequeue)
 357 {
 358         struct mid_q_entry *mid;
 359         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
 360         __u64 wire_mid = le64_to_cpu(shdr->MessageId);
 361
 362         if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
 363                 cifs_server_dbg(VFS, "Encrypted frame parsing not supported yet\n");
 364                 return NULL;
 365         }
 366
 367         spin_lock(&server->mid_lock);
 368         list_for_each_entry(mid, &server->pending_mid_q, qhead) {
 369                 if ((mid->mid == wire_mid) &&
 370                     (mid->mid_state == MID_REQUEST_SUBMITTED) &&
 371                     (mid->command == shdr->Command)) {
 372                         kref_get(&mid->refcount);
 373                         if (dequeue) {
 374                                 list_del_init(&mid->qhead);
 375                                 mid->mid_flags |= MID_DELETED;
 376                         }
 377                         spin_unlock(&server->mid_lock);
 378                         return mid;
 379                 }
 380         }
 381         spin_unlock(&server->mid_lock);
 382         return NULL;
 383 }
 384
 385 static struct mid_q_entry *
 386 smb2_find_mid(struct TCP_Server_Info *server, char *buf)
 387 {
 388         return __smb2_find_mid(server, buf, false);
 389 }
 390
 391 static struct mid_q_entry *
 392 smb2_find_dequeue_mid(struct TCP_Server_Info *server, char *buf)
 393 {
 394         return __smb2_find_mid(server, buf, true);
 395 }
 396
 397 static void
 398 smb2_dump_detail(void *buf, struct TCP_Server_Info *server)
 399 {
 400 #ifdef CONFIG_CIFS_DEBUG2
 401         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
 402
 403         cifs_server_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
 404                  shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId,
 405                  shdr->Id.SyncId.ProcessId);
 406         cifs_server_dbg(VFS, "smb buf %p len %u\n", buf,
 407                  server->ops->calc_smb_size(buf));
 408 #endif
 409 }
 410
 411 static bool
 412 smb2_need_neg(struct TCP_Server_Info *server)
 413 {
 414         return server->max_read == 0;
 415 }
 416
 417 static int
 418 smb2_negotiate(const unsigned int xid,
 419                struct cifs_ses *ses,
 420                struct TCP_Server_Info *server)
 421 {
 422         int rc;
 423
 424         spin_lock(&server->mid_lock);
 425         server->CurrentMid = 0;
 426         spin_unlock(&server->mid_lock);
 427         rc = SMB2_negotiate(xid, ses, server);
 428         /* BB we probably don't need to retry with modern servers */
 429         if (rc == -EAGAIN)
 430                 rc = -EHOSTDOWN;
 431         return rc;
 432 }
 433
 434 static unsigned int
 435 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
 436 {
 437         struct TCP_Server_Info *server = tcon->ses->server;
 438         unsigned int wsize;
 439
 440         /* start with specified wsize, or default */
 441         wsize = ctx->wsize ? ctx->wsize : CIFS_DEFAULT_IOSIZE;
 442         wsize = min_t(unsigned int, wsize, server->max_write);
 443         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 444                 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
 445
 446         return wsize;
 447 }
 448
 449 static unsigned int
 450 smb3_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
 451 {
 452         struct TCP_Server_Info *server = tcon->ses->server;
 453         unsigned int wsize;
 454
 455         /* start with specified wsize, or default */
 456         wsize = ctx->wsize ? ctx->wsize : SMB3_DEFAULT_IOSIZE;
 457         wsize = min_t(unsigned int, wsize, server->max_write);
 458 #ifdef CONFIG_CIFS_SMB_DIRECT
 459         if (server->rdma) {
 460                 if (server->sign)
 461                         /*
 462                          * Account for SMB2 data transfer packet header and
 463                          * possible encryption header
 464                          */
 465                         wsize = min_t(unsigned int,
 466                                 wsize,
 467                                 server->smbd_conn->max_fragmented_send_size -
 468                                         SMB2_READWRITE_PDU_HEADER_SIZE -
 469                                         sizeof(struct smb2_transform_hdr));
 470                 else
 471                         wsize = min_t(unsigned int,
 472                                 wsize, server->smbd_conn->max_readwrite_size);
 473         }
 474 #endif
 475         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 476                 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
 477
 478         return wsize;
 479 }
 480
 481 static unsigned int
 482 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
 483 {
 484         struct TCP_Server_Info *server = tcon->ses->server;
 485         unsigned int rsize;
 486
 487         /* start with specified rsize, or default */
 488         rsize = ctx->rsize ? ctx->rsize : CIFS_DEFAULT_IOSIZE;
 489         rsize = min_t(unsigned int, rsize, server->max_read);
 490
 491         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 492                 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
 493
 494         return rsize;
 495 }
 496
 497 static unsigned int
 498 smb3_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
 499 {
 500         struct TCP_Server_Info *server = tcon->ses->server;
 501         unsigned int rsize;
 502
 503         /* start with specified rsize, or default */
 504         rsize = ctx->rsize ? ctx->rsize : SMB3_DEFAULT_IOSIZE;
 505         rsize = min_t(unsigned int, rsize, server->max_read);
 506 #ifdef CONFIG_CIFS_SMB_DIRECT
 507         if (server->rdma) {
 508                 if (server->sign)
 509                         /*
 510                          * Account for SMB2 data transfer packet header and
 511                          * possible encryption header
 512                          */
 513                         rsize = min_t(unsigned int,
 514                                 rsize,
 515                                 server->smbd_conn->max_fragmented_recv_size -
 516                                         SMB2_READWRITE_PDU_HEADER_SIZE -
 517                                         sizeof(struct smb2_transform_hdr));
 518                 else
 519                         rsize = min_t(unsigned int,
 520                                 rsize, server->smbd_conn->max_readwrite_size);
 521         }
 522 #endif
 523
 524         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 525                 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
 526
 527         return rsize;
 528 }
 529
 530 /*
 531  * compare two interfaces a and b
 532  * return 0 if everything matches.
 533  * return 1 if a is rdma capable, or rss capable, or has higher link speed
 534  * return -1 otherwise.
 535  */
 536 static int
 537 iface_cmp(struct cifs_server_iface *a, struct cifs_server_iface *b)
 538 {
 539         int cmp_ret = 0;
 540
 541         WARN_ON(!a || !b);
 542         if (a->rdma_capable == b->rdma_capable) {
 543                 if (a->rss_capable == b->rss_capable) {
 544                         if (a->speed == b->speed) {
 545                                 cmp_ret = cifs_ipaddr_cmp((struct sockaddr *) &a->sockaddr,
 546                                                           (struct sockaddr *) &b->sockaddr);
 547                                 if (!cmp_ret)
 548                                         return 0;
 549                                 else if (cmp_ret > 0)
 550                                         return 1;
 551                                 else
 552                                         return -1;
 553                         } else if (a->speed > b->speed)
 554                                 return 1;
 555                         else
 556                                 return -1;
 557                 } else if (a->rss_capable > b->rss_capable)
 558                         return 1;
 559                 else
 560                         return -1;
 561         } else if (a->rdma_capable > b->rdma_capable)
 562                 return 1;
 563         else
 564                 return -1;
 565 }
 566
 567 static int
 568 parse_server_interfaces(struct network_interface_info_ioctl_rsp *buf,
 569                         size_t buf_len, struct cifs_ses *ses, bool in_mount)
 570 {
 571         struct network_interface_info_ioctl_rsp *p;
 572         struct sockaddr_in *addr4;
 573         struct sockaddr_in6 *addr6;
 574         struct iface_info_ipv4 *p4;
 575         struct iface_info_ipv6 *p6;
 576         struct cifs_server_iface *info = NULL, *iface = NULL, *niface = NULL;
 577         struct cifs_server_iface tmp_iface;
 578         ssize_t bytes_left;
 579         size_t next = 0;
 580         int nb_iface = 0;
 581         int rc = 0, ret = 0;
 582
 583         bytes_left = buf_len;
 584         p = buf;
 585
 586         spin_lock(&ses->iface_lock);
 587         /* do not query too frequently, this time with lock held */
 588         if (ses->iface_last_update &&
 589             time_before(jiffies, ses->iface_last_update +
 590                         (SMB_INTERFACE_POLL_INTERVAL * HZ))) {
 591                 spin_unlock(&ses->iface_lock);
 592                 return 0;
 593         }
 594
 595         /*
 596          * Go through iface_list and do kref_put to remove
 597          * any unused ifaces. ifaces in use will be removed
 598          * when the last user calls a kref_put on it
 599          */
 600         list_for_each_entry_safe(iface, niface, &ses->iface_list,
 601                                  iface_head) {
 602                 iface->is_active = 0;
 603                 kref_put(&iface->refcount, release_iface);
 604                 ses->iface_count--;
 605         }
 606         spin_unlock(&ses->iface_lock);
 607
 608         /*
 609          * Samba server e.g. can return an empty interface list in some cases,
 610          * which would only be a problem if we were requesting multichannel
 611          */
 612         if (bytes_left == 0) {
 613                 /* avoid spamming logs every 10 minutes, so log only in mount */
 614                 if ((ses->chan_max > 1) && in_mount)
 615                         cifs_dbg(VFS,
 616                                  "multichannel not available\n"
 617                                  "Empty network interface list returned by server %s\n",
 618                                  ses->server->hostname);
 619                 rc = -EINVAL;
 620                 goto out;
 621         }
 622
 623         while (bytes_left >= sizeof(*p)) {
 624                 memset(&tmp_iface, 0, sizeof(tmp_iface));
 625                 tmp_iface.speed = le64_to_cpu(p->LinkSpeed);
 626                 tmp_iface.rdma_capable = le32_to_cpu(p->Capability & RDMA_CAPABLE) ? 1 : 0;
 627                 tmp_iface.rss_capable = le32_to_cpu(p->Capability & RSS_CAPABLE) ? 1 : 0;
 628
 629                 switch (p->Family) {
 630                 /*
 631                  * The kernel and wire socket structures have the same
 632                  * layout and use network byte order but make the
 633                  * conversion explicit in case either one changes.
 634                  */
 635                 case INTERNETWORK:
 636                         addr4 = (struct sockaddr_in *)&tmp_iface.sockaddr;
 637                         p4 = (struct iface_info_ipv4 *)p->Buffer;
 638                         addr4->sin_family = AF_INET;
 639                         memcpy(&addr4->sin_addr, &p4->IPv4Address, 4);
 640
 641                         /* [MS-SMB2] 2.2.32.5.1.1 Clients MUST ignore these */
 642                         addr4->sin_port = cpu_to_be16(CIFS_PORT);
 643
 644                         cifs_dbg(FYI, "%s: ipv4 %pI4\n", __func__,
 645                                  &addr4->sin_addr);
 646                         break;
 647                 case INTERNETWORKV6:
 648                         addr6 = (struct sockaddr_in6 *)&tmp_iface.sockaddr;
 649                         p6 = (struct iface_info_ipv6 *)p->Buffer;
 650                         addr6->sin6_family = AF_INET6;
 651                         memcpy(&addr6->sin6_addr, &p6->IPv6Address, 16);
 652
 653                         /* [MS-SMB2] 2.2.32.5.1.2 Clients MUST ignore these */
 654                         addr6->sin6_flowinfo = 0;
 655                         addr6->sin6_scope_id = 0;
 656                         addr6->sin6_port = cpu_to_be16(CIFS_PORT);
 657
 658                         cifs_dbg(FYI, "%s: ipv6 %pI6\n", __func__,
 659                                  &addr6->sin6_addr);
 660                         break;
 661                 default:
 662                         cifs_dbg(VFS,
 663                                  "%s: skipping unsupported socket family\n",
 664                                  __func__);
 665                         goto next_iface;
 666                 }
 667
 668                 /*
 669                  * The iface_list is assumed to be sorted by speed.
 670                  * Check if the new interface exists in that list.
 671                  * NEVER change iface. it could be in use.
 672                  * Add a new one instead
 673                  */
 674                 spin_lock(&ses->iface_lock);
 675                 list_for_each_entry_safe(iface, niface, &ses->iface_list,
 676                                          iface_head) {
 677                         ret = iface_cmp(iface, &tmp_iface);
 678                         if (!ret) {
 679                                 /* just get a ref so that it doesn't get picked/freed */
 680                                 iface->is_active = 1;
 681                                 kref_get(&iface->refcount);
 682                                 ses->iface_count++;
 683                                 spin_unlock(&ses->iface_lock);
 684                                 goto next_iface;
 685                         } else if (ret < 0) {
 686                                 /* all remaining ifaces are slower */
 687                                 kref_get(&iface->refcount);
 688                                 break;
 689                         }
 690                 }
 691                 spin_unlock(&ses->iface_lock);
 692
 693                 /* no match. insert the entry in the list */
 694                 info = kmalloc(sizeof(struct cifs_server_iface),
 695                                GFP_KERNEL);
 696                 if (!info) {
 697                         rc = -ENOMEM;
 698                         goto out;
 699                 }
 700                 memcpy(info, &tmp_iface, sizeof(tmp_iface));
 701
 702                 /* add this new entry to the list */
 703                 kref_init(&info->refcount);
 704                 info->is_active = 1;
 705
 706                 cifs_dbg(FYI, "%s: adding iface %zu\n", __func__, ses->iface_count);
 707                 cifs_dbg(FYI, "%s: speed %zu bps\n", __func__, info->speed);
 708                 cifs_dbg(FYI, "%s: capabilities 0x%08x\n", __func__,
 709                          le32_to_cpu(p->Capability));
 710
 711                 spin_lock(&ses->iface_lock);
 712                 if (!list_entry_is_head(iface, &ses->iface_list, iface_head)) {
 713                         list_add_tail(&info->iface_head, &iface->iface_head);
 714                         kref_put(&iface->refcount, release_iface);
 715                 } else
 716                         list_add_tail(&info->iface_head, &ses->iface_list);
 717
 718                 ses->iface_count++;
 719                 spin_unlock(&ses->iface_lock);
 720                 ses->iface_last_update = jiffies;
 721 next_iface:
 722                 nb_iface++;
 723                 next = le32_to_cpu(p->Next);
 724                 if (!next) {
 725                         bytes_left -= sizeof(*p);
 726                         break;
 727                 }
 728                 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
 729                 bytes_left -= next;
 730         }
 731
 732         if (!nb_iface) {
 733                 cifs_dbg(VFS, "%s: malformed interface info\n", __func__);
 734                 rc = -EINVAL;
 735                 goto out;
 736         }
 737
 738         /* Azure rounds the buffer size up 8, to a 16 byte boundary */
 739         if ((bytes_left > 8) || p->Next)
 740                 cifs_dbg(VFS, "%s: incomplete interface info\n", __func__);
 741
 742
 743         if (!ses->iface_count) {
 744                 rc = -EINVAL;
 745                 goto out;
 746         }
 747
 748 out:
 749         return rc;
 750 }
 751
 752 int
 753 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon, bool in_mount)
 754 {
 755         int rc;
 756         unsigned int ret_data_len = 0;
 757         struct network_interface_info_ioctl_rsp *out_buf = NULL;
 758         struct cifs_ses *ses = tcon->ses;
 759
 760         /* do not query too frequently */
 761         if (ses->iface_last_update &&
 762             time_before(jiffies, ses->iface_last_update +
 763                         (SMB_INTERFACE_POLL_INTERVAL * HZ)))
 764                 return 0;
 765
 766         rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
 767                         FSCTL_QUERY_NETWORK_INTERFACE_INFO,
 768                         NULL /* no data input */, 0 /* no data input */,
 769                         CIFSMaxBufSize, (char **)&out_buf, &ret_data_len);
 770         if (rc == -EOPNOTSUPP) {
 771                 cifs_dbg(FYI,
 772                          "server does not support query network interfaces\n");
 773                 ret_data_len = 0;
 774         } else if (rc != 0) {
 775                 cifs_tcon_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
 776                 goto out;
 777         }
 778
 779         rc = parse_server_interfaces(out_buf, ret_data_len, ses, in_mount);
 780         if (rc)
 781                 goto out;
 782
 783 out:
 784         kfree(out_buf);
 785         return rc;
 786 }
 787
 788 static void
 789 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
 790               struct cifs_sb_info *cifs_sb)
 791 {
 792         int rc;
 793         __le16 srch_path = 0; /* Null - open root of share */
 794         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 795         struct cifs_open_parms oparms;
 796         struct cifs_fid fid;
 797         struct cached_fid *cfid = NULL;
 798
 799         oparms = (struct cifs_open_parms) {
 800                 .tcon = tcon,
 801                 .path = "",
 802                 .desired_access = FILE_READ_ATTRIBUTES,
 803                 .disposition = FILE_OPEN,
 804                 .create_options = cifs_create_options(cifs_sb, 0),
 805                 .fid = &fid,
 806         };
 807
 808         rc = open_cached_dir(xid, tcon, "", cifs_sb, false, &cfid);
 809         if (rc == 0)
 810                 memcpy(&fid, &cfid->fid, sizeof(struct cifs_fid));
 811         else
 812                 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
 813                                NULL, NULL);
 814         if (rc)
 815                 return;
 816
 817         SMB3_request_interfaces(xid, tcon, true /* called during  mount */);
 818
 819         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 820                         FS_ATTRIBUTE_INFORMATION);
 821         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 822                         FS_DEVICE_INFORMATION);
 823         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 824                         FS_VOLUME_INFORMATION);
 825         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 826                         FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
 827         if (cfid == NULL)
 828                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 829         else
 830                 close_cached_dir(cfid);
 831 }
 832
 833 static void
 834 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
 835               struct cifs_sb_info *cifs_sb)
 836 {
 837         int rc;
 838         __le16 srch_path = 0; /* Null - open root of share */
 839         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 840         struct cifs_open_parms oparms;
 841         struct cifs_fid fid;
 842
 843         oparms = (struct cifs_open_parms) {
 844                 .tcon = tcon,
 845                 .path = "",
 846                 .desired_access = FILE_READ_ATTRIBUTES,
 847                 .disposition = FILE_OPEN,
 848                 .create_options = cifs_create_options(cifs_sb, 0),
 849                 .fid = &fid,
 850         };
 851
 852         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
 853                        NULL, NULL);
 854         if (rc)
 855                 return;
 856
 857         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 858                         FS_ATTRIBUTE_INFORMATION);
 859         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 860                         FS_DEVICE_INFORMATION);
 861         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 862 }
 863
 864 static int
 865 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
 866                         struct cifs_sb_info *cifs_sb, const char *full_path)
 867 {
 868         __le16 *utf16_path;
 869         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 870         int err_buftype = CIFS_NO_BUFFER;
 871         struct cifs_open_parms oparms;
 872         struct kvec err_iov = {};
 873         struct cifs_fid fid;
 874         struct cached_fid *cfid;
 875         bool islink;
 876         int rc, rc2;
 877
 878         rc = open_cached_dir(xid, tcon, full_path, cifs_sb, true, &cfid);
 879         if (!rc) {
 880                 if (cfid->has_lease) {
 881                         close_cached_dir(cfid);
 882                         return 0;
 883                 }
 884                 close_cached_dir(cfid);
 885         }
 886
 887         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
 888         if (!utf16_path)
 889                 return -ENOMEM;
 890
 891         oparms = (struct cifs_open_parms) {
 892                 .tcon = tcon,
 893                 .path = full_path,
 894                 .desired_access = FILE_READ_ATTRIBUTES,
 895                 .disposition = FILE_OPEN,
 896                 .create_options = cifs_create_options(cifs_sb, 0),
 897                 .fid = &fid,
 898         };
 899
 900         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL,
 901                        &err_iov, &err_buftype);
 902         if (rc) {
 903                 struct smb2_hdr *hdr = err_iov.iov_base;
 904
 905                 if (unlikely(!hdr || err_buftype == CIFS_NO_BUFFER))
 906                         goto out;
 907
 908                 if (rc != -EREMOTE && hdr->Status == STATUS_OBJECT_NAME_INVALID) {
 909                         rc2 = cifs_inval_name_dfs_link_error(xid, tcon, cifs_sb,
 910                                                              full_path, &islink);
 911                         if (rc2) {
 912                                 rc = rc2;
 913                                 goto out;
 914                         }
 915                         if (islink)
 916                                 rc = -EREMOTE;
 917                 }
 918                 if (rc == -EREMOTE && IS_ENABLED(CONFIG_CIFS_DFS_UPCALL) && cifs_sb &&
 919                     (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_DFS))
 920                         rc = -EOPNOTSUPP;
 921                 goto out;
 922         }
 923
 924         rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 925
 926 out:
 927         free_rsp_buf(err_buftype, err_iov.iov_base);
 928         kfree(utf16_path);
 929         return rc;
 930 }
 931
 932 static int smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
 933                              struct cifs_sb_info *cifs_sb, const char *full_path,
 934                              u64 *uniqueid, struct cifs_open_info_data *data)
 935 {
 936         *uniqueid = le64_to_cpu(data->fi.IndexNumber);
 937         return 0;
 938 }
 939
 940 static int smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
 941                                 struct cifsFileInfo *cfile, struct cifs_open_info_data *data)
 942 {
 943         struct cifs_fid *fid = &cfile->fid;
 944
 945         if (cfile->symlink_target) {
 946                 data->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL);
 947                 if (!data->symlink_target)
 948                         return -ENOMEM;
 949         }
 950         return SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid, &data->fi);
 951 }
 952
 953 #ifdef CONFIG_CIFS_XATTR
 954 static ssize_t
 955 move_smb2_ea_to_cifs(char *dst, size_t dst_size,
 956                      struct smb2_file_full_ea_info *src, size_t src_size,
 957                      const unsigned char *ea_name)
 958 {
 959         int rc = 0;
 960         unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0;
 961         char *name, *value;
 962         size_t buf_size = dst_size;
 963         size_t name_len, value_len, user_name_len;
 964
 965         while (src_size > 0) {
 966                 name_len = (size_t)src->ea_name_length;
 967                 value_len = (size_t)le16_to_cpu(src->ea_value_length);
 968
 969                 if (name_len == 0)
 970                         break;
 971
 972                 if (src_size < 8 + name_len + 1 + value_len) {
 973                         cifs_dbg(FYI, "EA entry goes beyond length of list\n");
 974                         rc = -EIO;
 975                         goto out;
 976                 }
 977
 978                 name = &src->ea_data[0];
 979                 value = &src->ea_data[src->ea_name_length + 1];
 980
 981                 if (ea_name) {
 982                         if (ea_name_len == name_len &&
 983                             memcmp(ea_name, name, name_len) == 0) {
 984                                 rc = value_len;
 985                                 if (dst_size == 0)
 986                                         goto out;
 987                                 if (dst_size < value_len) {
 988                                         rc = -ERANGE;
 989                                         goto out;
 990                                 }
 991                                 memcpy(dst, value, value_len);
 992                                 goto out;
 993                         }
 994                 } else {
 995                         /* 'user.' plus a terminating null */
 996                         user_name_len = 5 + 1 + name_len;
 997
 998                         if (buf_size == 0) {
 999                                 /* skip copy - calc size only */
1000                                 rc += user_name_len;
1001                         } else if (dst_size >= user_name_len) {
1002                                 dst_size -= user_name_len;
1003                                 memcpy(dst, "user.", 5);
1004                                 dst += 5;
1005                                 memcpy(dst, src->ea_data, name_len);
1006                                 dst += name_len;
1007                                 *dst = 0;
1008                                 ++dst;
1009                                 rc += user_name_len;
1010                         } else {
1011                                 /* stop before overrun buffer */
1012                                 rc = -ERANGE;
1013                                 break;
1014                         }
1015                 }
1016
1017                 if (!src->next_entry_offset)
1018                         break;
1019
1020                 if (src_size < le32_to_cpu(src->next_entry_offset)) {
1021                         /* stop before overrun buffer */
1022                         rc = -ERANGE;
1023                         break;
1024                 }
1025                 src_size -= le32_to_cpu(src->next_entry_offset);
1026                 src = (void *)((char *)src +
1027                                le32_to_cpu(src->next_entry_offset));
1028         }
1029
1030         /* didn't find the named attribute */
1031         if (ea_name)
1032                 rc = -ENODATA;
1033
1034 out:
1035         return (ssize_t)rc;
1036 }
1037
1038 static ssize_t
1039 smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
1040                const unsigned char *path, const unsigned char *ea_name,
1041                char *ea_data, size_t buf_size,
1042                struct cifs_sb_info *cifs_sb)
1043 {
1044         int rc;
1045         struct kvec rsp_iov = {NULL, 0};
1046         int buftype = CIFS_NO_BUFFER;
1047         struct smb2_query_info_rsp *rsp;
1048         struct smb2_file_full_ea_info *info = NULL;
1049
1050         rc = smb2_query_info_compound(xid, tcon, path,
1051                                       FILE_READ_EA,
1052                                       FILE_FULL_EA_INFORMATION,
1053                                       SMB2_O_INFO_FILE,
1054                                       CIFSMaxBufSize -
1055                                       MAX_SMB2_CREATE_RESPONSE_SIZE -
1056                                       MAX_SMB2_CLOSE_RESPONSE_SIZE,
1057                                       &rsp_iov, &buftype, cifs_sb);
1058         if (rc) {
1059                 /*
1060                  * If ea_name is NULL (listxattr) and there are no EAs,
1061                  * return 0 as it's not an error. Otherwise, the specified
1062                  * ea_name was not found.
1063                  */
1064                 if (!ea_name && rc == -ENODATA)
1065                         rc = 0;
1066                 goto qeas_exit;
1067         }
1068
1069         rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
1070         rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
1071                                le32_to_cpu(rsp->OutputBufferLength),
1072                                &rsp_iov,
1073                                sizeof(struct smb2_file_full_ea_info));
1074         if (rc)
1075                 goto qeas_exit;
1076
1077         info = (struct smb2_file_full_ea_info *)(
1078                         le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
1079         rc = move_smb2_ea_to_cifs(ea_data, buf_size, info,
1080                         le32_to_cpu(rsp->OutputBufferLength), ea_name);
1081
1082  qeas_exit:
1083         free_rsp_buf(buftype, rsp_iov.iov_base);
1084         return rc;
1085 }
1086
1087 static int
1088 smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
1089             const char *path, const char *ea_name, const void *ea_value,
1090             const __u16 ea_value_len, const struct nls_table *nls_codepage,
1091             struct cifs_sb_info *cifs_sb)
1092 {
1093         struct smb2_compound_vars *vars;
1094         struct cifs_ses *ses = tcon->ses;
1095         struct TCP_Server_Info *server = cifs_pick_channel(ses);
1096         struct smb_rqst *rqst;
1097         struct kvec *rsp_iov;
1098         __le16 *utf16_path = NULL;
1099         int ea_name_len = strlen(ea_name);
1100         int flags = CIFS_CP_CREATE_CLOSE_OP;
1101         int len;
1102         int resp_buftype[3];
1103         struct cifs_open_parms oparms;
1104         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1105         struct cifs_fid fid;
1106         unsigned int size[1];
1107         void *data[1];
1108         struct smb2_file_full_ea_info *ea = NULL;
1109         struct smb2_query_info_rsp *rsp;
1110         int rc, used_len = 0;
1111
1112         if (smb3_encryption_required(tcon))
1113                 flags |= CIFS_TRANSFORM_REQ;
1114
1115         if (ea_name_len > 255)
1116                 return -EINVAL;
1117
1118         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1119         if (!utf16_path)
1120                 return -ENOMEM;
1121
1122         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1123         vars = kzalloc(sizeof(*vars), GFP_KERNEL);
1124         if (!vars) {
1125                 rc = -ENOMEM;
1126                 goto out_free_path;
1127         }
1128         rqst = vars->rqst;
1129         rsp_iov = vars->rsp_iov;
1130
1131         if (ses->server->ops->query_all_EAs) {
1132                 if (!ea_value) {
1133                         rc = ses->server->ops->query_all_EAs(xid, tcon, path,
1134                                                              ea_name, NULL, 0,
1135                                                              cifs_sb);
1136                         if (rc == -ENODATA)
1137                                 goto sea_exit;
1138                 } else {
1139                         /* If we are adding a attribute we should first check
1140                          * if there will be enough space available to store
1141                          * the new EA. If not we should not add it since we
1142                          * would not be able to even read the EAs back.
1143                          */
1144                         rc = smb2_query_info_compound(xid, tcon, path,
1145                                       FILE_READ_EA,
1146                                       FILE_FULL_EA_INFORMATION,
1147                                       SMB2_O_INFO_FILE,
1148                                       CIFSMaxBufSize -
1149                                       MAX_SMB2_CREATE_RESPONSE_SIZE -
1150                                       MAX_SMB2_CLOSE_RESPONSE_SIZE,
1151                                       &rsp_iov[1], &resp_buftype[1], cifs_sb);
1152                         if (rc == 0) {
1153                                 rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1154                                 used_len = le32_to_cpu(rsp->OutputBufferLength);
1155                         }
1156                         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1157                         resp_buftype[1] = CIFS_NO_BUFFER;
1158                         memset(&rsp_iov[1], 0, sizeof(rsp_iov[1]));
1159                         rc = 0;
1160
1161                         /* Use a fudge factor of 256 bytes in case we collide
1162                          * with a different set_EAs command.
1163                          */
1164                         if (CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE -
1165                            MAX_SMB2_CLOSE_RESPONSE_SIZE - 256 <
1166                            used_len + ea_name_len + ea_value_len + 1) {
1167                                 rc = -ENOSPC;
1168                                 goto sea_exit;
1169                         }
1170                 }
1171         }
1172
1173         /* Open */
1174         rqst[0].rq_iov = vars->open_iov;
1175         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1176
1177         oparms = (struct cifs_open_parms) {
1178                 .tcon = tcon,
1179                 .path = path,
1180                 .desired_access = FILE_WRITE_EA,
1181                 .disposition = FILE_OPEN,
1182                 .create_options = cifs_create_options(cifs_sb, 0),
1183                 .fid = &fid,
1184         };
1185
1186         rc = SMB2_open_init(tcon, server,
1187                             &rqst[0], &oplock, &oparms, utf16_path);
1188         if (rc)
1189                 goto sea_exit;
1190         smb2_set_next_command(tcon, &rqst[0]);
1191
1192
1193         /* Set Info */
1194         rqst[1].rq_iov = vars->si_iov;
1195         rqst[1].rq_nvec = 1;
1196
1197         len = sizeof(*ea) + ea_name_len + ea_value_len + 1;
1198         ea = kzalloc(len, GFP_KERNEL);
1199         if (ea == NULL) {
1200                 rc = -ENOMEM;
1201                 goto sea_exit;
1202         }
1203
1204         ea->ea_name_length = ea_name_len;
1205         ea->ea_value_length = cpu_to_le16(ea_value_len);
1206         memcpy(ea->ea_data, ea_name, ea_name_len + 1);
1207         memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len);
1208
1209         size[0] = len;
1210         data[0] = ea;
1211
1212         rc = SMB2_set_info_init(tcon, server,
1213                                 &rqst[1], COMPOUND_FID,
1214                                 COMPOUND_FID, current->tgid,
1215                                 FILE_FULL_EA_INFORMATION,
1216                                 SMB2_O_INFO_FILE, 0, data, size);
1217         if (rc)
1218                 goto sea_exit;
1219         smb2_set_next_command(tcon, &rqst[1]);
1220         smb2_set_related(&rqst[1]);
1221
1222         /* Close */
1223         rqst[2].rq_iov = &vars->close_iov;
1224         rqst[2].rq_nvec = 1;
1225         rc = SMB2_close_init(tcon, server,
1226                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
1227         if (rc)
1228                 goto sea_exit;
1229         smb2_set_related(&rqst[2]);
1230
1231         rc = compound_send_recv(xid, ses, server,
1232                                 flags, 3, rqst,
1233                                 resp_buftype, rsp_iov);
1234         /* no need to bump num_remote_opens because handle immediately closed */
1235
1236  sea_exit:
1237         kfree(ea);
1238         SMB2_open_free(&rqst[0]);
1239         SMB2_set_info_free(&rqst[1]);
1240         SMB2_close_free(&rqst[2]);
1241         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1242         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1243         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1244         kfree(vars);
1245 out_free_path:
1246         kfree(utf16_path);
1247         return rc;
1248 }
1249 #endif
1250
1251 static bool
1252 smb2_can_echo(struct TCP_Server_Info *server)
1253 {
1254         return server->echoes;
1255 }
1256
1257 static void
1258 smb2_clear_stats(struct cifs_tcon *tcon)
1259 {
1260         int i;
1261
1262         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
1263                 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
1264                 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
1265         }
1266 }
1267
1268 static void
1269 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
1270 {
1271         seq_puts(m, "\n\tShare Capabilities:");
1272         if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
1273                 seq_puts(m, " DFS,");
1274         if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
1275                 seq_puts(m, " CONTINUOUS AVAILABILITY,");
1276         if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
1277                 seq_puts(m, " SCALEOUT,");
1278         if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
1279                 seq_puts(m, " CLUSTER,");
1280         if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
1281                 seq_puts(m, " ASYMMETRIC,");
1282         if (tcon->capabilities == 0)
1283                 seq_puts(m, " None");
1284         if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
1285                 seq_puts(m, " Aligned,");
1286         if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
1287                 seq_puts(m, " Partition Aligned,");
1288         if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
1289                 seq_puts(m, " SSD,");
1290         if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
1291                 seq_puts(m, " TRIM-support,");
1292
1293         seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
1294         seq_printf(m, "\n\ttid: 0x%x", tcon->tid);
1295         if (tcon->perf_sector_size)
1296                 seq_printf(m, "\tOptimal sector size: 0x%x",
1297                            tcon->perf_sector_size);
1298         seq_printf(m, "\tMaximal Access: 0x%x", tcon->maximal_access);
1299 }
1300
1301 static void
1302 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
1303 {
1304         atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
1305         atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
1306
1307         /*
1308          *  Can't display SMB2_NEGOTIATE, SESSION_SETUP, LOGOFF, CANCEL and ECHO
1309          *  totals (requests sent) since those SMBs are per-session not per tcon
1310          */
1311         seq_printf(m, "\nBytes read: %llu  Bytes written: %llu",
1312                    (long long)(tcon->bytes_read),
1313                    (long long)(tcon->bytes_written));
1314         seq_printf(m, "\nOpen files: %d total (local), %d open on server",
1315                    atomic_read(&tcon->num_local_opens),
1316                    atomic_read(&tcon->num_remote_opens));
1317         seq_printf(m, "\nTreeConnects: %d total %d failed",
1318                    atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
1319                    atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
1320         seq_printf(m, "\nTreeDisconnects: %d total %d failed",
1321                    atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
1322                    atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
1323         seq_printf(m, "\nCreates: %d total %d failed",
1324                    atomic_read(&sent[SMB2_CREATE_HE]),
1325                    atomic_read(&failed[SMB2_CREATE_HE]));
1326         seq_printf(m, "\nCloses: %d total %d failed",
1327                    atomic_read(&sent[SMB2_CLOSE_HE]),
1328                    atomic_read(&failed[SMB2_CLOSE_HE]));
1329         seq_printf(m, "\nFlushes: %d total %d failed",
1330                    atomic_read(&sent[SMB2_FLUSH_HE]),
1331                    atomic_read(&failed[SMB2_FLUSH_HE]));
1332         seq_printf(m, "\nReads: %d total %d failed",
1333                    atomic_read(&sent[SMB2_READ_HE]),
1334                    atomic_read(&failed[SMB2_READ_HE]));
1335         seq_printf(m, "\nWrites: %d total %d failed",
1336                    atomic_read(&sent[SMB2_WRITE_HE]),
1337                    atomic_read(&failed[SMB2_WRITE_HE]));
1338         seq_printf(m, "\nLocks: %d total %d failed",
1339                    atomic_read(&sent[SMB2_LOCK_HE]),
1340                    atomic_read(&failed[SMB2_LOCK_HE]));
1341         seq_printf(m, "\nIOCTLs: %d total %d failed",
1342                    atomic_read(&sent[SMB2_IOCTL_HE]),
1343                    atomic_read(&failed[SMB2_IOCTL_HE]));
1344         seq_printf(m, "\nQueryDirectories: %d total %d failed",
1345                    atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
1346                    atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
1347         seq_printf(m, "\nChangeNotifies: %d total %d failed",
1348                    atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
1349                    atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
1350         seq_printf(m, "\nQueryInfos: %d total %d failed",
1351                    atomic_read(&sent[SMB2_QUERY_INFO_HE]),
1352                    atomic_read(&failed[SMB2_QUERY_INFO_HE]));
1353         seq_printf(m, "\nSetInfos: %d total %d failed",
1354                    atomic_read(&sent[SMB2_SET_INFO_HE]),
1355                    atomic_read(&failed[SMB2_SET_INFO_HE]));
1356         seq_printf(m, "\nOplockBreaks: %d sent %d failed",
1357                    atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
1358                    atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
1359 }
1360
1361 static void
1362 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
1363 {
1364         struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
1365         struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
1366
1367         cfile->fid.persistent_fid = fid->persistent_fid;
1368         cfile->fid.volatile_fid = fid->volatile_fid;
1369         cfile->fid.access = fid->access;
1370 #ifdef CONFIG_CIFS_DEBUG2
1371         cfile->fid.mid = fid->mid;
1372 #endif /* CIFS_DEBUG2 */
1373         server->ops->set_oplock_level(cinode, oplock, fid->epoch,
1374                                       &fid->purge_cache);
1375         cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
1376         memcpy(cfile->fid.create_guid, fid->create_guid, 16);
1377 }
1378
1379 static void
1380 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
1381                 struct cifs_fid *fid)
1382 {
1383         SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1384 }
1385
1386 static void
1387 smb2_close_getattr(const unsigned int xid, struct cifs_tcon *tcon,
1388                    struct cifsFileInfo *cfile)
1389 {
1390         struct smb2_file_network_open_info file_inf;
1391         struct inode *inode;
1392         int rc;
1393
1394         rc = __SMB2_close(xid, tcon, cfile->fid.persistent_fid,
1395                    cfile->fid.volatile_fid, &file_inf);
1396         if (rc)
1397                 return;
1398
1399         inode = d_inode(cfile->dentry);
1400
1401         spin_lock(&inode->i_lock);
1402         CIFS_I(inode)->time = jiffies;
1403
1404         /* Creation time should not need to be updated on close */
1405         if (file_inf.LastWriteTime)
1406                 inode_set_mtime_to_ts(inode,
1407                                       cifs_NTtimeToUnix(file_inf.LastWriteTime));
1408         if (file_inf.ChangeTime)
1409                 inode_set_ctime_to_ts(inode,
1410                                       cifs_NTtimeToUnix(file_inf.ChangeTime));
1411         if (file_inf.LastAccessTime)
1412                 inode_set_atime_to_ts(inode,
1413                                       cifs_NTtimeToUnix(file_inf.LastAccessTime));
1414
1415         /*
1416          * i_blocks is not related to (i_size / i_blksize),
1417          * but instead 512 byte (2**9) size is required for
1418          * calculating num blocks.
1419          */
1420         if (le64_to_cpu(file_inf.AllocationSize) > 4096)
1421                 inode->i_blocks =
1422                         (512 - 1 + le64_to_cpu(file_inf.AllocationSize)) >> 9;
1423
1424         /* End of file and Attributes should not have to be updated on close */
1425         spin_unlock(&inode->i_lock);
1426 }
1427
1428 static int
1429 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
1430                      u64 persistent_fid, u64 volatile_fid,
1431                      struct copychunk_ioctl *pcchunk)
1432 {
1433         int rc;
1434         unsigned int ret_data_len;
1435         struct resume_key_req *res_key;
1436
1437         rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
1438                         FSCTL_SRV_REQUEST_RESUME_KEY, NULL, 0 /* no input */,
1439                         CIFSMaxBufSize, (char **)&res_key, &ret_data_len);
1440
1441         if (rc == -EOPNOTSUPP) {
1442                 pr_warn_once("Server share %s does not support copy range\n", tcon->tree_name);
1443                 goto req_res_key_exit;
1444         } else if (rc) {
1445                 cifs_tcon_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
1446                 goto req_res_key_exit;
1447         }
1448         if (ret_data_len < sizeof(struct resume_key_req)) {
1449                 cifs_tcon_dbg(VFS, "Invalid refcopy resume key length\n");
1450                 rc = -EINVAL;
1451                 goto req_res_key_exit;
1452         }
1453         memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
1454
1455 req_res_key_exit:
1456         kfree(res_key);
1457         return rc;
1458 }
1459
1460 static int
1461 smb2_ioctl_query_info(const unsigned int xid,
1462                       struct cifs_tcon *tcon,
1463                       struct cifs_sb_info *cifs_sb,
1464                       __le16 *path, int is_dir,
1465                       unsigned long p)
1466 {
1467         struct smb2_compound_vars *vars;
1468         struct smb_rqst *rqst;
1469         struct kvec *rsp_iov;
1470         struct cifs_ses *ses = tcon->ses;
1471         struct TCP_Server_Info *server = cifs_pick_channel(ses);
1472         char __user *arg = (char __user *)p;
1473         struct smb_query_info qi;
1474         struct smb_query_info __user *pqi;
1475         int rc = 0;
1476         int flags = CIFS_CP_CREATE_CLOSE_OP;
1477         struct smb2_query_info_rsp *qi_rsp = NULL;
1478         struct smb2_ioctl_rsp *io_rsp = NULL;
1479         void *buffer = NULL;
1480         int resp_buftype[3];
1481         struct cifs_open_parms oparms;
1482         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1483         struct cifs_fid fid;
1484         unsigned int size[2];
1485         void *data[2];
1486         int create_options = is_dir ? CREATE_NOT_FILE : CREATE_NOT_DIR;
1487         void (*free_req1_func)(struct smb_rqst *r);
1488
1489         vars = kzalloc(sizeof(*vars), GFP_ATOMIC);
1490         if (vars == NULL)
1491                 return -ENOMEM;
1492         rqst = &vars->rqst[0];
1493         rsp_iov = &vars->rsp_iov[0];
1494
1495         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1496
1497         if (copy_from_user(&qi, arg, sizeof(struct smb_query_info))) {
1498                 rc = -EFAULT;
1499                 goto free_vars;
1500         }
1501         if (qi.output_buffer_length > 1024) {
1502                 rc = -EINVAL;
1503                 goto free_vars;
1504         }
1505
1506         if (!ses || !server) {
1507                 rc = -EIO;
1508                 goto free_vars;
1509         }
1510
1511         if (smb3_encryption_required(tcon))
1512                 flags |= CIFS_TRANSFORM_REQ;
1513
1514         if (qi.output_buffer_length) {
1515                 buffer = memdup_user(arg + sizeof(struct smb_query_info), qi.output_buffer_length);
1516                 if (IS_ERR(buffer)) {
1517                         rc = PTR_ERR(buffer);
1518                         goto free_vars;
1519                 }
1520         }
1521
1522         /* Open */
1523         rqst[0].rq_iov = &vars->open_iov[0];
1524         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1525
1526         oparms = (struct cifs_open_parms) {
1527                 .tcon = tcon,
1528                 .disposition = FILE_OPEN,
1529                 .create_options = cifs_create_options(cifs_sb, create_options),
1530                 .fid = &fid,
1531         };
1532
1533         if (qi.flags & PASSTHRU_FSCTL) {
1534                 switch (qi.info_type & FSCTL_DEVICE_ACCESS_MASK) {
1535                 case FSCTL_DEVICE_ACCESS_FILE_READ_WRITE_ACCESS:
1536                         oparms.desired_access = FILE_READ_DATA | FILE_WRITE_DATA | FILE_READ_ATTRIBUTES | SYNCHRONIZE;
1537                         break;
1538                 case FSCTL_DEVICE_ACCESS_FILE_ANY_ACCESS:
1539                         oparms.desired_access = GENERIC_ALL;
1540                         break;
1541                 case FSCTL_DEVICE_ACCESS_FILE_READ_ACCESS:
1542                         oparms.desired_access = GENERIC_READ;
1543                         break;
1544                 case FSCTL_DEVICE_ACCESS_FILE_WRITE_ACCESS:
1545                         oparms.desired_access = GENERIC_WRITE;
1546                         break;
1547                 }
1548         } else if (qi.flags & PASSTHRU_SET_INFO) {
1549                 oparms.desired_access = GENERIC_WRITE;
1550         } else {
1551                 oparms.desired_access = FILE_READ_ATTRIBUTES | READ_CONTROL;
1552         }
1553
1554         rc = SMB2_open_init(tcon, server,
1555                             &rqst[0], &oplock, &oparms, path);
1556         if (rc)
1557                 goto free_output_buffer;
1558         smb2_set_next_command(tcon, &rqst[0]);
1559
1560         /* Query */
1561         if (qi.flags & PASSTHRU_FSCTL) {
1562                 /* Can eventually relax perm check since server enforces too */
1563                 if (!capable(CAP_SYS_ADMIN)) {
1564                         rc = -EPERM;
1565                         goto free_open_req;
1566                 }
1567                 rqst[1].rq_iov = &vars->io_iov[0];
1568                 rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
1569
1570                 rc = SMB2_ioctl_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID,
1571                                      qi.info_type, buffer, qi.output_buffer_length,
1572                                      CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE -
1573                                      MAX_SMB2_CLOSE_RESPONSE_SIZE);
1574                 free_req1_func = SMB2_ioctl_free;
1575         } else if (qi.flags == PASSTHRU_SET_INFO) {
1576                 /* Can eventually relax perm check since server enforces too */
1577                 if (!capable(CAP_SYS_ADMIN)) {
1578                         rc = -EPERM;
1579                         goto free_open_req;
1580                 }
1581                 if (qi.output_buffer_length < 8) {
1582                         rc = -EINVAL;
1583                         goto free_open_req;
1584                 }
1585                 rqst[1].rq_iov = vars->si_iov;
1586                 rqst[1].rq_nvec = 1;
1587
1588                 /* MS-FSCC 2.4.13 FileEndOfFileInformation */
1589                 size[0] = 8;
1590                 data[0] = buffer;
1591
1592                 rc = SMB2_set_info_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID,
1593                                         current->tgid, FILE_END_OF_FILE_INFORMATION,
1594                                         SMB2_O_INFO_FILE, 0, data, size);
1595                 free_req1_func = SMB2_set_info_free;
1596         } else if (qi.flags == PASSTHRU_QUERY_INFO) {
1597                 rqst[1].rq_iov = &vars->qi_iov;
1598                 rqst[1].rq_nvec = 1;
1599
1600                 rc = SMB2_query_info_init(tcon, server,
1601                                   &rqst[1], COMPOUND_FID,
1602                                   COMPOUND_FID, qi.file_info_class,
1603                                   qi.info_type, qi.additional_information,
1604                                   qi.input_buffer_length,
1605                                   qi.output_buffer_length, buffer);
1606                 free_req1_func = SMB2_query_info_free;
1607         } else { /* unknown flags */
1608                 cifs_tcon_dbg(VFS, "Invalid passthru query flags: 0x%x\n",
1609                               qi.flags);
1610                 rc = -EINVAL;
1611         }
1612
1613         if (rc)
1614                 goto free_open_req;
1615         smb2_set_next_command(tcon, &rqst[1]);
1616         smb2_set_related(&rqst[1]);
1617
1618         /* Close */
1619         rqst[2].rq_iov = &vars->close_iov;
1620         rqst[2].rq_nvec = 1;
1621
1622         rc = SMB2_close_init(tcon, server,
1623                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
1624         if (rc)
1625                 goto free_req_1;
1626         smb2_set_related(&rqst[2]);
1627
1628         rc = compound_send_recv(xid, ses, server,
1629                                 flags, 3, rqst,
1630                                 resp_buftype, rsp_iov);
1631         if (rc)
1632                 goto out;
1633
1634         /* No need to bump num_remote_opens since handle immediately closed */
1635         if (qi.flags & PASSTHRU_FSCTL) {
1636                 pqi = (struct smb_query_info __user *)arg;
1637                 io_rsp = (struct smb2_ioctl_rsp *)rsp_iov[1].iov_base;
1638                 if (le32_to_cpu(io_rsp->OutputCount) < qi.input_buffer_length)
1639                         qi.input_buffer_length = le32_to_cpu(io_rsp->OutputCount);
1640                 if (qi.input_buffer_length > 0 &&
1641                     le32_to_cpu(io_rsp->OutputOffset) + qi.input_buffer_length
1642                     > rsp_iov[1].iov_len) {
1643                         rc = -EFAULT;
1644                         goto out;
1645                 }
1646
1647                 if (copy_to_user(&pqi->input_buffer_length,
1648                                  &qi.input_buffer_length,
1649                                  sizeof(qi.input_buffer_length))) {
1650                         rc = -EFAULT;
1651                         goto out;
1652                 }
1653
1654                 if (copy_to_user((void __user *)pqi + sizeof(struct smb_query_info),
1655                                  (const void *)io_rsp + le32_to_cpu(io_rsp->OutputOffset),
1656                                  qi.input_buffer_length))
1657                         rc = -EFAULT;
1658         } else {
1659                 pqi = (struct smb_query_info __user *)arg;
1660                 qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1661                 if (le32_to_cpu(qi_rsp->OutputBufferLength) < qi.input_buffer_length)
1662                         qi.input_buffer_length = le32_to_cpu(qi_rsp->OutputBufferLength);
1663                 if (copy_to_user(&pqi->input_buffer_length,
1664                                  &qi.input_buffer_length,
1665                                  sizeof(qi.input_buffer_length))) {
1666                         rc = -EFAULT;
1667                         goto out;
1668                 }
1669
1670                 if (copy_to_user(pqi + 1, qi_rsp->Buffer,
1671                                  qi.input_buffer_length))
1672                         rc = -EFAULT;
1673         }
1674
1675 out:
1676         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1677         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1678         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1679         SMB2_close_free(&rqst[2]);
1680 free_req_1:
1681         free_req1_func(&rqst[1]);
1682 free_open_req:
1683         SMB2_open_free(&rqst[0]);
1684 free_output_buffer:
1685         kfree(buffer);
1686 free_vars:
1687         kfree(vars);
1688         return rc;
1689 }
1690
1691 static ssize_t
1692 smb2_copychunk_range(const unsigned int xid,
1693                         struct cifsFileInfo *srcfile,
1694                         struct cifsFileInfo *trgtfile, u64 src_off,
1695                         u64 len, u64 dest_off)
1696 {
1697         int rc;
1698         unsigned int ret_data_len;
1699         struct copychunk_ioctl *pcchunk;
1700         struct copychunk_ioctl_rsp *retbuf = NULL;
1701         struct cifs_tcon *tcon;
1702         int chunks_copied = 0;
1703         bool chunk_sizes_updated = false;
1704         ssize_t bytes_written, total_bytes_written = 0;
1705
1706         pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
1707         if (pcchunk == NULL)
1708                 return -ENOMEM;
1709
1710         cifs_dbg(FYI, "%s: about to call request res key\n", __func__);
1711         /* Request a key from the server to identify the source of the copy */
1712         rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
1713                                 srcfile->fid.persistent_fid,
1714                                 srcfile->fid.volatile_fid, pcchunk);
1715
1716         /* Note: request_res_key sets res_key null only if rc !=0 */
1717         if (rc)
1718                 goto cchunk_out;
1719
1720         /* For now array only one chunk long, will make more flexible later */
1721         pcchunk->ChunkCount = cpu_to_le32(1);
1722         pcchunk->Reserved = 0;
1723         pcchunk->Reserved2 = 0;
1724
1725         tcon = tlink_tcon(trgtfile->tlink);
1726
1727         while (len > 0) {
1728                 pcchunk->SourceOffset = cpu_to_le64(src_off);
1729                 pcchunk->TargetOffset = cpu_to_le64(dest_off);
1730                 pcchunk->Length =
1731                         cpu_to_le32(min_t(u64, len, tcon->max_bytes_chunk));
1732
1733                 /* Request server copy to target from src identified by key */
1734                 kfree(retbuf);
1735                 retbuf = NULL;
1736                 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1737                         trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
1738                         (char *)pcchunk, sizeof(struct copychunk_ioctl),
1739                         CIFSMaxBufSize, (char **)&retbuf, &ret_data_len);
1740                 if (rc == 0) {
1741                         if (ret_data_len !=
1742                                         sizeof(struct copychunk_ioctl_rsp)) {
1743                                 cifs_tcon_dbg(VFS, "Invalid cchunk response size\n");
1744                                 rc = -EIO;
1745                                 goto cchunk_out;
1746                         }
1747                         if (retbuf->TotalBytesWritten == 0) {
1748                                 cifs_dbg(FYI, "no bytes copied\n");
1749                                 rc = -EIO;
1750                                 goto cchunk_out;
1751                         }
1752                         /*
1753                          * Check if server claimed to write more than we asked
1754                          */
1755                         if (le32_to_cpu(retbuf->TotalBytesWritten) >
1756                             le32_to_cpu(pcchunk->Length)) {
1757                                 cifs_tcon_dbg(VFS, "Invalid copy chunk response\n");
1758                                 rc = -EIO;
1759                                 goto cchunk_out;
1760                         }
1761                         if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
1762                                 cifs_tcon_dbg(VFS, "Invalid num chunks written\n");
1763                                 rc = -EIO;
1764                                 goto cchunk_out;
1765                         }
1766                         chunks_copied++;
1767
1768                         bytes_written = le32_to_cpu(retbuf->TotalBytesWritten);
1769                         src_off += bytes_written;
1770                         dest_off += bytes_written;
1771                         len -= bytes_written;
1772                         total_bytes_written += bytes_written;
1773
1774                         cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n",
1775                                 le32_to_cpu(retbuf->ChunksWritten),
1776                                 le32_to_cpu(retbuf->ChunkBytesWritten),
1777                                 bytes_written);
1778                 } else if (rc == -EINVAL) {
1779                         if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
1780                                 goto cchunk_out;
1781
1782                         cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
1783                                 le32_to_cpu(retbuf->ChunksWritten),
1784                                 le32_to_cpu(retbuf->ChunkBytesWritten),
1785                                 le32_to_cpu(retbuf->TotalBytesWritten));
1786
1787                         /*
1788                          * Check if this is the first request using these sizes,
1789                          * (ie check if copy succeed once with original sizes
1790                          * and check if the server gave us different sizes after
1791                          * we already updated max sizes on previous request).
1792                          * if not then why is the server returning an error now
1793                          */
1794                         if ((chunks_copied != 0) || chunk_sizes_updated)
1795                                 goto cchunk_out;
1796
1797                         /* Check that server is not asking us to grow size */
1798                         if (le32_to_cpu(retbuf->ChunkBytesWritten) <
1799                                         tcon->max_bytes_chunk)
1800                                 tcon->max_bytes_chunk =
1801                                         le32_to_cpu(retbuf->ChunkBytesWritten);
1802                         else
1803                                 goto cchunk_out; /* server gave us bogus size */
1804
1805                         /* No need to change MaxChunks since already set to 1 */
1806                         chunk_sizes_updated = true;
1807                 } else
1808                         goto cchunk_out;
1809         }
1810
1811 cchunk_out:
1812         kfree(pcchunk);
1813         kfree(retbuf);
1814         if (rc)
1815                 return rc;
1816         else
1817                 return total_bytes_written;
1818 }
1819
1820 static int
1821 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
1822                 struct cifs_fid *fid)
1823 {
1824         return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1825 }
1826
1827 static unsigned int
1828 smb2_read_data_offset(char *buf)
1829 {
1830         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1831
1832         return rsp->DataOffset;
1833 }
1834
1835 static unsigned int
1836 smb2_read_data_length(char *buf, bool in_remaining)
1837 {
1838         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1839
1840         if (in_remaining)
1841                 return le32_to_cpu(rsp->DataRemaining);
1842
1843         return le32_to_cpu(rsp->DataLength);
1844 }
1845
1846
1847 static int
1848 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
1849                struct cifs_io_parms *parms, unsigned int *bytes_read,
1850                char **buf, int *buf_type)
1851 {
1852         parms->persistent_fid = pfid->persistent_fid;
1853         parms->volatile_fid = pfid->volatile_fid;
1854         return SMB2_read(xid, parms, bytes_read, buf, buf_type);
1855 }
1856
1857 static int
1858 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
1859                 struct cifs_io_parms *parms, unsigned int *written,
1860                 struct kvec *iov, unsigned long nr_segs)
1861 {
1862
1863         parms->persistent_fid = pfid->persistent_fid;
1864         parms->volatile_fid = pfid->volatile_fid;
1865         return SMB2_write(xid, parms, written, iov, nr_segs);
1866 }
1867
1868 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
1869 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
1870                 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
1871 {
1872         struct cifsInodeInfo *cifsi;
1873         int rc;
1874
1875         cifsi = CIFS_I(inode);
1876
1877         /* if file already sparse don't bother setting sparse again */
1878         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
1879                 return true; /* already sparse */
1880
1881         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
1882                 return true; /* already not sparse */
1883
1884         /*
1885          * Can't check for sparse support on share the usual way via the
1886          * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
1887          * since Samba server doesn't set the flag on the share, yet
1888          * supports the set sparse FSCTL and returns sparse correctly
1889          * in the file attributes. If we fail setting sparse though we
1890          * mark that server does not support sparse files for this share
1891          * to avoid repeatedly sending the unsupported fsctl to server
1892          * if the file is repeatedly extended.
1893          */
1894         if (tcon->broken_sparse_sup)
1895                 return false;
1896
1897         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1898                         cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
1899                         &setsparse, 1, CIFSMaxBufSize, NULL, NULL);
1900         if (rc) {
1901                 tcon->broken_sparse_sup = true;
1902                 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
1903                 return false;
1904         }
1905
1906         if (setsparse)
1907                 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
1908         else
1909                 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
1910
1911         return true;
1912 }
1913
1914 static int
1915 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
1916                    struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
1917 {
1918         __le64 eof = cpu_to_le64(size);
1919         struct inode *inode;
1920
1921         /*
1922          * If extending file more than one page make sparse. Many Linux fs
1923          * make files sparse by default when extending via ftruncate
1924          */
1925         inode = d_inode(cfile->dentry);
1926
1927         if (!set_alloc && (size > inode->i_size + 8192)) {
1928                 __u8 set_sparse = 1;
1929
1930                 /* whether set sparse succeeds or not, extend the file */
1931                 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
1932         }
1933
1934         return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
1935                             cfile->fid.volatile_fid, cfile->pid, &eof);
1936 }
1937
1938 static int
1939 smb2_duplicate_extents(const unsigned int xid,
1940                         struct cifsFileInfo *srcfile,
1941                         struct cifsFileInfo *trgtfile, u64 src_off,
1942                         u64 len, u64 dest_off)
1943 {
1944         int rc;
1945         unsigned int ret_data_len;
1946         struct inode *inode;
1947         struct duplicate_extents_to_file dup_ext_buf;
1948         struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
1949
1950         /* server fileays advertise duplicate extent support with this flag */
1951         if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
1952              FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
1953                 return -EOPNOTSUPP;
1954
1955         dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
1956         dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
1957         dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
1958         dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
1959         dup_ext_buf.ByteCount = cpu_to_le64(len);
1960         cifs_dbg(FYI, "Duplicate extents: src off %lld dst off %lld len %lld\n",
1961                 src_off, dest_off, len);
1962
1963         inode = d_inode(trgtfile->dentry);
1964         if (inode->i_size < dest_off + len) {
1965                 rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
1966                 if (rc)
1967                         goto duplicate_extents_out;
1968
1969                 /*
1970                  * Although also could set plausible allocation size (i_blocks)
1971                  * here in addition to setting the file size, in reflink
1972                  * it is likely that the target file is sparse. Its allocation
1973                  * size will be queried on next revalidate, but it is important
1974                  * to make sure that file's cached size is updated immediately
1975                  */
1976                 cifs_setsize(inode, dest_off + len);
1977         }
1978         rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1979                         trgtfile->fid.volatile_fid,
1980                         FSCTL_DUPLICATE_EXTENTS_TO_FILE,
1981                         (char *)&dup_ext_buf,
1982                         sizeof(struct duplicate_extents_to_file),
1983                         CIFSMaxBufSize, NULL,
1984                         &ret_data_len);
1985
1986         if (ret_data_len > 0)
1987                 cifs_dbg(FYI, "Non-zero response length in duplicate extents\n");
1988
1989 duplicate_extents_out:
1990         return rc;
1991 }
1992
1993 static int
1994 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
1995                    struct cifsFileInfo *cfile)
1996 {
1997         return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
1998                             cfile->fid.volatile_fid);
1999 }
2000
2001 static int
2002 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
2003                    struct cifsFileInfo *cfile)
2004 {
2005         struct fsctl_set_integrity_information_req integr_info;
2006         unsigned int ret_data_len;
2007
2008         integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
2009         integr_info.Flags = 0;
2010         integr_info.Reserved = 0;
2011
2012         return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2013                         cfile->fid.volatile_fid,
2014                         FSCTL_SET_INTEGRITY_INFORMATION,
2015                         (char *)&integr_info,
2016                         sizeof(struct fsctl_set_integrity_information_req),
2017                         CIFSMaxBufSize, NULL,
2018                         &ret_data_len);
2019
2020 }
2021
2022 /* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */
2023 #define GMT_TOKEN_SIZE 50
2024
2025 #define MIN_SNAPSHOT_ARRAY_SIZE 16 /* See MS-SMB2 section 3.3.5.15.1 */
2026
2027 /*
2028  * Input buffer contains (empty) struct smb_snapshot array with size filled in
2029  * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2
2030  */
2031 static int
2032 smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
2033                    struct cifsFileInfo *cfile, void __user *ioc_buf)
2034 {
2035         char *retbuf = NULL;
2036         unsigned int ret_data_len = 0;
2037         int rc;
2038         u32 max_response_size;
2039         struct smb_snapshot_array snapshot_in;
2040
2041         /*
2042          * On the first query to enumerate the list of snapshots available
2043          * for this volume the buffer begins with 0 (number of snapshots
2044          * which can be returned is zero since at that point we do not know
2045          * how big the buffer needs to be). On the second query,
2046          * it (ret_data_len) is set to number of snapshots so we can
2047          * know to set the maximum response size larger (see below).
2048          */
2049         if (get_user(ret_data_len, (unsigned int __user *)ioc_buf))
2050                 return -EFAULT;
2051
2052         /*
2053          * Note that for snapshot queries that servers like Azure expect that
2054          * the first query be minimal size (and just used to get the number/size
2055          * of previous versions) so response size must be specified as EXACTLY
2056          * sizeof(struct snapshot_array) which is 16 when rounded up to multiple
2057          * of eight bytes.
2058          */
2059         if (ret_data_len == 0)
2060                 max_response_size = MIN_SNAPSHOT_ARRAY_SIZE;
2061         else
2062                 max_response_size = CIFSMaxBufSize;
2063
2064         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2065                         cfile->fid.volatile_fid,
2066                         FSCTL_SRV_ENUMERATE_SNAPSHOTS,
2067                         NULL, 0 /* no input data */, max_response_size,
2068                         (char **)&retbuf,
2069                         &ret_data_len);
2070         cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n",
2071                         rc, ret_data_len);
2072         if (rc)
2073                 return rc;
2074
2075         if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) {
2076                 /* Fixup buffer */
2077                 if (copy_from_user(&snapshot_in, ioc_buf,
2078                     sizeof(struct smb_snapshot_array))) {
2079                         rc = -EFAULT;
2080                         kfree(retbuf);
2081                         return rc;
2082                 }
2083
2084                 /*
2085                  * Check for min size, ie not large enough to fit even one GMT
2086                  * token (snapshot).  On the first ioctl some users may pass in
2087                  * smaller size (or zero) to simply get the size of the array
2088                  * so the user space caller can allocate sufficient memory
2089                  * and retry the ioctl again with larger array size sufficient
2090                  * to hold all of the snapshot GMT tokens on the second try.
2091                  */
2092                 if (snapshot_in.snapshot_array_size < GMT_TOKEN_SIZE)
2093                         ret_data_len = sizeof(struct smb_snapshot_array);
2094
2095                 /*
2096                  * We return struct SRV_SNAPSHOT_ARRAY, followed by
2097                  * the snapshot array (of 50 byte GMT tokens) each
2098                  * representing an available previous version of the data
2099                  */
2100                 if (ret_data_len > (snapshot_in.snapshot_array_size +
2101                                         sizeof(struct smb_snapshot_array)))
2102                         ret_data_len = snapshot_in.snapshot_array_size +
2103                                         sizeof(struct smb_snapshot_array);
2104
2105                 if (copy_to_user(ioc_buf, retbuf, ret_data_len))
2106                         rc = -EFAULT;
2107         }
2108
2109         kfree(retbuf);
2110         return rc;
2111 }
2112
2113
2114
2115 static int
2116 smb3_notify(const unsigned int xid, struct file *pfile,
2117             void __user *ioc_buf, bool return_changes)
2118 {
2119         struct smb3_notify_info notify;
2120         struct smb3_notify_info __user *pnotify_buf;
2121         struct dentry *dentry = pfile->f_path.dentry;
2122         struct inode *inode = file_inode(pfile);
2123         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2124         struct cifs_open_parms oparms;
2125         struct cifs_fid fid;
2126         struct cifs_tcon *tcon;
2127         const unsigned char *path;
2128         char *returned_ioctl_info = NULL;
2129         void *page = alloc_dentry_path();
2130         __le16 *utf16_path = NULL;
2131         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2132         int rc = 0;
2133         __u32 ret_len = 0;
2134
2135         path = build_path_from_dentry(dentry, page);
2136         if (IS_ERR(path)) {
2137                 rc = PTR_ERR(path);
2138                 goto notify_exit;
2139         }
2140
2141         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2142         if (utf16_path == NULL) {
2143                 rc = -ENOMEM;
2144                 goto notify_exit;
2145         }
2146
2147         if (return_changes) {
2148                 if (copy_from_user(&notify, ioc_buf, sizeof(struct smb3_notify_info))) {
2149                         rc = -EFAULT;
2150                         goto notify_exit;
2151                 }
2152         } else {
2153                 if (copy_from_user(&notify, ioc_buf, sizeof(struct smb3_notify))) {
2154                         rc = -EFAULT;
2155                         goto notify_exit;
2156                 }
2157                 notify.data_len = 0;
2158         }
2159
2160         tcon = cifs_sb_master_tcon(cifs_sb);
2161         oparms = (struct cifs_open_parms) {
2162                 .tcon = tcon,
2163                 .path = path,
2164                 .desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA,
2165                 .disposition = FILE_OPEN,
2166                 .create_options = cifs_create_options(cifs_sb, 0),
2167                 .fid = &fid,
2168         };
2169
2170         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
2171                        NULL);
2172         if (rc)
2173                 goto notify_exit;
2174
2175         rc = SMB2_change_notify(xid, tcon, fid.persistent_fid, fid.volatile_fid,
2176                                 notify.watch_tree, notify.completion_filter,
2177                                 notify.data_len, &returned_ioctl_info, &ret_len);
2178
2179         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2180
2181         cifs_dbg(FYI, "change notify for path %s rc %d\n", path, rc);
2182         if (return_changes && (ret_len > 0) && (notify.data_len > 0)) {
2183                 if (ret_len > notify.data_len)
2184                         ret_len = notify.data_len;
2185                 pnotify_buf = (struct smb3_notify_info __user *)ioc_buf;
2186                 if (copy_to_user(pnotify_buf->notify_data, returned_ioctl_info, ret_len))
2187                         rc = -EFAULT;
2188                 else if (copy_to_user(&pnotify_buf->data_len, &ret_len, sizeof(ret_len)))
2189                         rc = -EFAULT;
2190         }
2191         kfree(returned_ioctl_info);
2192 notify_exit:
2193         free_dentry_path(page);
2194         kfree(utf16_path);
2195         return rc;
2196 }
2197
2198 static int
2199 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
2200                      const char *path, struct cifs_sb_info *cifs_sb,
2201                      struct cifs_fid *fid, __u16 search_flags,
2202                      struct cifs_search_info *srch_inf)
2203 {
2204         __le16 *utf16_path;
2205         struct smb_rqst rqst[2];
2206         struct kvec rsp_iov[2];
2207         int resp_buftype[2];
2208         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2209         struct kvec qd_iov[SMB2_QUERY_DIRECTORY_IOV_SIZE];
2210         int rc, flags = 0;
2211         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2212         struct cifs_open_parms oparms;
2213         struct smb2_query_directory_rsp *qd_rsp = NULL;
2214         struct smb2_create_rsp *op_rsp = NULL;
2215         struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
2216         int retry_count = 0;
2217
2218         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2219         if (!utf16_path)
2220                 return -ENOMEM;
2221
2222         if (smb3_encryption_required(tcon))
2223                 flags |= CIFS_TRANSFORM_REQ;
2224
2225         memset(rqst, 0, sizeof(rqst));
2226         resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER;
2227         memset(rsp_iov, 0, sizeof(rsp_iov));
2228
2229         /* Open */
2230         memset(&open_iov, 0, sizeof(open_iov));
2231         rqst[0].rq_iov = open_iov;
2232         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2233
2234         oparms = (struct cifs_open_parms) {
2235                 .tcon = tcon,
2236                 .path = path,
2237                 .desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA,
2238                 .disposition = FILE_OPEN,
2239                 .create_options = cifs_create_options(cifs_sb, 0),
2240                 .fid = fid,
2241         };
2242
2243         rc = SMB2_open_init(tcon, server,
2244                             &rqst[0], &oplock, &oparms, utf16_path);
2245         if (rc)
2246                 goto qdf_free;
2247         smb2_set_next_command(tcon, &rqst[0]);
2248
2249         /* Query directory */
2250         srch_inf->entries_in_buffer = 0;
2251         srch_inf->index_of_last_entry = 2;
2252
2253         memset(&qd_iov, 0, sizeof(qd_iov));
2254         rqst[1].rq_iov = qd_iov;
2255         rqst[1].rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE;
2256
2257         rc = SMB2_query_directory_init(xid, tcon, server,
2258                                        &rqst[1],
2259                                        COMPOUND_FID, COMPOUND_FID,
2260                                        0, srch_inf->info_level);
2261         if (rc)
2262                 goto qdf_free;
2263
2264         smb2_set_related(&rqst[1]);
2265
2266 again:
2267         rc = compound_send_recv(xid, tcon->ses, server,
2268                                 flags, 2, rqst,
2269                                 resp_buftype, rsp_iov);
2270
2271         if (rc == -EAGAIN && retry_count++ < 10)
2272                 goto again;
2273
2274         /* If the open failed there is nothing to do */
2275         op_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base;
2276         if (op_rsp == NULL || op_rsp->hdr.Status != STATUS_SUCCESS) {
2277                 cifs_dbg(FYI, "query_dir_first: open failed rc=%d\n", rc);
2278                 goto qdf_free;
2279         }
2280         fid->persistent_fid = op_rsp->PersistentFileId;
2281         fid->volatile_fid = op_rsp->VolatileFileId;
2282
2283         /* Anything else than ENODATA means a genuine error */
2284         if (rc && rc != -ENODATA) {
2285                 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2286                 cifs_dbg(FYI, "query_dir_first: query directory failed rc=%d\n", rc);
2287                 trace_smb3_query_dir_err(xid, fid->persistent_fid,
2288                                          tcon->tid, tcon->ses->Suid, 0, 0, rc);
2289                 goto qdf_free;
2290         }
2291
2292         atomic_inc(&tcon->num_remote_opens);
2293
2294         qd_rsp = (struct smb2_query_directory_rsp *)rsp_iov[1].iov_base;
2295         if (qd_rsp->hdr.Status == STATUS_NO_MORE_FILES) {
2296                 trace_smb3_query_dir_done(xid, fid->persistent_fid,
2297                                           tcon->tid, tcon->ses->Suid, 0, 0);
2298                 srch_inf->endOfSearch = true;
2299                 rc = 0;
2300                 goto qdf_free;
2301         }
2302
2303         rc = smb2_parse_query_directory(tcon, &rsp_iov[1], resp_buftype[1],
2304                                         srch_inf);
2305         if (rc) {
2306                 trace_smb3_query_dir_err(xid, fid->persistent_fid, tcon->tid,
2307                         tcon->ses->Suid, 0, 0, rc);
2308                 goto qdf_free;
2309         }
2310         resp_buftype[1] = CIFS_NO_BUFFER;
2311
2312         trace_smb3_query_dir_done(xid, fid->persistent_fid, tcon->tid,
2313                         tcon->ses->Suid, 0, srch_inf->entries_in_buffer);
2314
2315  qdf_free:
2316         kfree(utf16_path);
2317         SMB2_open_free(&rqst[0]);
2318         SMB2_query_directory_free(&rqst[1]);
2319         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2320         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2321         return rc;
2322 }
2323
2324 static int
2325 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
2326                     struct cifs_fid *fid, __u16 search_flags,
2327                     struct cifs_search_info *srch_inf)
2328 {
2329         return SMB2_query_directory(xid, tcon, fid->persistent_fid,
2330                                     fid->volatile_fid, 0, srch_inf);
2331 }
2332
2333 static int
2334 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
2335                struct cifs_fid *fid)
2336 {
2337         return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2338 }
2339
2340 /*
2341  * If we negotiate SMB2 protocol and get STATUS_PENDING - update
2342  * the number of credits and return true. Otherwise - return false.
2343  */
2344 static bool
2345 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server)
2346 {
2347         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2348         int scredits, in_flight;
2349
2350         if (shdr->Status != STATUS_PENDING)
2351                 return false;
2352
2353         if (shdr->CreditRequest) {
2354                 spin_lock(&server->req_lock);
2355                 server->credits += le16_to_cpu(shdr->CreditRequest);
2356                 scredits = server->credits;
2357                 in_flight = server->in_flight;
2358                 spin_unlock(&server->req_lock);
2359                 wake_up(&server->request_q);
2360
2361                 trace_smb3_pend_credits(server->CurrentMid,
2362                                 server->conn_id, server->hostname, scredits,
2363                                 le16_to_cpu(shdr->CreditRequest), in_flight);
2364                 cifs_dbg(FYI, "%s: status pending add %u credits total=%d\n",
2365                                 __func__, le16_to_cpu(shdr->CreditRequest), scredits);
2366         }
2367
2368         return true;
2369 }
2370
2371 static bool
2372 smb2_is_session_expired(char *buf)
2373 {
2374         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2375
2376         if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED &&
2377             shdr->Status != STATUS_USER_SESSION_DELETED)
2378                 return false;
2379
2380         trace_smb3_ses_expired(le32_to_cpu(shdr->Id.SyncId.TreeId),
2381                                le64_to_cpu(shdr->SessionId),
2382                                le16_to_cpu(shdr->Command),
2383                                le64_to_cpu(shdr->MessageId));
2384         cifs_dbg(FYI, "Session expired or deleted\n");
2385
2386         return true;
2387 }
2388
2389 static bool
2390 smb2_is_status_io_timeout(char *buf)
2391 {
2392         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2393
2394         if (shdr->Status == STATUS_IO_TIMEOUT)
2395                 return true;
2396         else
2397                 return false;
2398 }
2399
2400 static bool
2401 smb2_is_network_name_deleted(char *buf, struct TCP_Server_Info *server)
2402 {
2403         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2404         struct TCP_Server_Info *pserver;
2405         struct cifs_ses *ses;
2406         struct cifs_tcon *tcon;
2407
2408         if (shdr->Status != STATUS_NETWORK_NAME_DELETED)
2409                 return false;
2410
2411         /* If server is a channel, select the primary channel */
2412         pserver = SERVER_IS_CHAN(server) ? server->primary_server : server;
2413
2414         spin_lock(&cifs_tcp_ses_lock);
2415         list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) {
2416                 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
2417                         if (tcon->tid == le32_to_cpu(shdr->Id.SyncId.TreeId)) {
2418                                 spin_lock(&tcon->tc_lock);
2419                                 tcon->need_reconnect = true;
2420                                 spin_unlock(&tcon->tc_lock);
2421                                 spin_unlock(&cifs_tcp_ses_lock);
2422                                 pr_warn_once("Server share %s deleted.\n",
2423                                              tcon->tree_name);
2424                                 return true;
2425                         }
2426                 }
2427         }
2428         spin_unlock(&cifs_tcp_ses_lock);
2429
2430         return false;
2431 }
2432
2433 static int
2434 smb2_oplock_response(struct cifs_tcon *tcon, __u64 persistent_fid,
2435                 __u64 volatile_fid, __u16 net_fid, struct cifsInodeInfo *cinode)
2436 {
2437         if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
2438                 return SMB2_lease_break(0, tcon, cinode->lease_key,
2439                                         smb2_get_lease_state(cinode));
2440
2441         return SMB2_oplock_break(0, tcon, persistent_fid, volatile_fid,
2442                                  CIFS_CACHE_READ(cinode) ? 1 : 0);
2443 }
2444
2445 void
2446 smb2_set_related(struct smb_rqst *rqst)
2447 {
2448         struct smb2_hdr *shdr;
2449
2450         shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base);
2451         if (shdr == NULL) {
2452                 cifs_dbg(FYI, "shdr NULL in smb2_set_related\n");
2453                 return;
2454         }
2455         shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
2456 }
2457
2458 char smb2_padding[7] = {0, 0, 0, 0, 0, 0, 0};
2459
2460 void
2461 smb2_set_next_command(struct cifs_tcon *tcon, struct smb_rqst *rqst)
2462 {
2463         struct smb2_hdr *shdr;
2464         struct cifs_ses *ses = tcon->ses;
2465         struct TCP_Server_Info *server = ses->server;
2466         unsigned long len = smb_rqst_len(server, rqst);
2467         int i, num_padding;
2468
2469         shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base);
2470         if (shdr == NULL) {
2471                 cifs_dbg(FYI, "shdr NULL in smb2_set_next_command\n");
2472                 return;
2473         }
2474
2475         /* SMB headers in a compound are 8 byte aligned. */
2476
2477         /* No padding needed */
2478         if (!(len & 7))
2479                 goto finished;
2480
2481         num_padding = 8 - (len & 7);
2482         if (!smb3_encryption_required(tcon)) {
2483                 /*
2484                  * If we do not have encryption then we can just add an extra
2485                  * iov for the padding.
2486                  */
2487                 rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding;
2488                 rqst->rq_iov[rqst->rq_nvec].iov_len = num_padding;
2489                 rqst->rq_nvec++;
2490                 len += num_padding;
2491         } else {
2492                 /*
2493                  * We can not add a small padding iov for the encryption case
2494                  * because the encryption framework can not handle the padding
2495                  * iovs.
2496                  * We have to flatten this into a single buffer and add
2497                  * the padding to it.
2498                  */
2499                 for (i = 1; i < rqst->rq_nvec; i++) {
2500                         memcpy(rqst->rq_iov[0].iov_base +
2501                                rqst->rq_iov[0].iov_len,
2502                                rqst->rq_iov[i].iov_base,
2503                                rqst->rq_iov[i].iov_len);
2504                         rqst->rq_iov[0].iov_len += rqst->rq_iov[i].iov_len;
2505                 }
2506                 memset(rqst->rq_iov[0].iov_base + rqst->rq_iov[0].iov_len,
2507                        0, num_padding);
2508                 rqst->rq_iov[0].iov_len += num_padding;
2509                 len += num_padding;
2510                 rqst->rq_nvec = 1;
2511         }
2512
2513  finished:
2514         shdr->NextCommand = cpu_to_le32(len);
2515 }
2516
2517 /*
2518  * Passes the query info response back to the caller on success.
2519  * Caller need to free this with free_rsp_buf().
2520  */
2521 int
2522 smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon,
2523                          const char *path, u32 desired_access,
2524                          u32 class, u32 type, u32 output_len,
2525                          struct kvec *rsp, int *buftype,
2526                          struct cifs_sb_info *cifs_sb)
2527 {
2528         struct smb2_compound_vars *vars;
2529         struct cifs_ses *ses = tcon->ses;
2530         struct TCP_Server_Info *server = cifs_pick_channel(ses);
2531         int flags = CIFS_CP_CREATE_CLOSE_OP;
2532         struct smb_rqst *rqst;
2533         int resp_buftype[3];
2534         struct kvec *rsp_iov;
2535         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2536         struct cifs_open_parms oparms;
2537         struct cifs_fid fid;
2538         int rc;
2539         __le16 *utf16_path;
2540         struct cached_fid *cfid = NULL;
2541
2542         if (!path)
2543                 path = "";
2544         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2545         if (!utf16_path)
2546                 return -ENOMEM;
2547
2548         if (smb3_encryption_required(tcon))
2549                 flags |= CIFS_TRANSFORM_REQ;
2550
2551         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
2552         vars = kzalloc(sizeof(*vars), GFP_KERNEL);
2553         if (!vars) {
2554                 rc = -ENOMEM;
2555                 goto out_free_path;
2556         }
2557         rqst = vars->rqst;
2558         rsp_iov = vars->rsp_iov;
2559
2560         /*
2561          * We can only call this for things we know are directories.
2562          */
2563         if (!strcmp(path, ""))
2564                 open_cached_dir(xid, tcon, path, cifs_sb, false,
2565                                 &cfid); /* cfid null if open dir failed */
2566
2567         rqst[0].rq_iov = vars->open_iov;
2568         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2569
2570         oparms = (struct cifs_open_parms) {
2571                 .tcon = tcon,
2572                 .path = path,
2573                 .desired_access = desired_access,
2574                 .disposition = FILE_OPEN,
2575                 .create_options = cifs_create_options(cifs_sb, 0),
2576                 .fid = &fid,
2577         };
2578
2579         rc = SMB2_open_init(tcon, server,
2580                             &rqst[0], &oplock, &oparms, utf16_path);
2581         if (rc)
2582                 goto qic_exit;
2583         smb2_set_next_command(tcon, &rqst[0]);
2584
2585         rqst[1].rq_iov = &vars->qi_iov;
2586         rqst[1].rq_nvec = 1;
2587
2588         if (cfid) {
2589                 rc = SMB2_query_info_init(tcon, server,
2590                                           &rqst[1],
2591                                           cfid->fid.persistent_fid,
2592                                           cfid->fid.volatile_fid,
2593                                           class, type, 0,
2594                                           output_len, 0,
2595                                           NULL);
2596         } else {
2597                 rc = SMB2_query_info_init(tcon, server,
2598                                           &rqst[1],
2599                                           COMPOUND_FID,
2600                                           COMPOUND_FID,
2601                                           class, type, 0,
2602                                           output_len, 0,
2603                                           NULL);
2604         }
2605         if (rc)
2606                 goto qic_exit;
2607         if (!cfid) {
2608                 smb2_set_next_command(tcon, &rqst[1]);
2609                 smb2_set_related(&rqst[1]);
2610         }
2611
2612         rqst[2].rq_iov = &vars->close_iov;
2613         rqst[2].rq_nvec = 1;
2614
2615         rc = SMB2_close_init(tcon, server,
2616                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
2617         if (rc)
2618                 goto qic_exit;
2619         smb2_set_related(&rqst[2]);
2620
2621         if (cfid) {
2622                 rc = compound_send_recv(xid, ses, server,
2623                                         flags, 1, &rqst[1],
2624                                         &resp_buftype[1], &rsp_iov[1]);
2625         } else {
2626                 rc = compound_send_recv(xid, ses, server,
2627                                         flags, 3, rqst,
2628                                         resp_buftype, rsp_iov);
2629         }
2630         if (rc) {
2631                 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2632                 if (rc == -EREMCHG) {
2633                         tcon->need_reconnect = true;
2634                         pr_warn_once("server share %s deleted\n",
2635                                      tcon->tree_name);
2636                 }
2637                 goto qic_exit;
2638         }
2639         *rsp = rsp_iov[1];
2640         *buftype = resp_buftype[1];
2641
2642  qic_exit:
2643         SMB2_open_free(&rqst[0]);
2644         SMB2_query_info_free(&rqst[1]);
2645         SMB2_close_free(&rqst[2]);
2646         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2647         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
2648         if (cfid)
2649                 close_cached_dir(cfid);
2650         kfree(vars);
2651 out_free_path:
2652         kfree(utf16_path);
2653         return rc;
2654 }
2655
2656 static int
2657 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2658              struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
2659 {
2660         struct smb2_query_info_rsp *rsp;
2661         struct smb2_fs_full_size_info *info = NULL;
2662         struct kvec rsp_iov = {NULL, 0};
2663         int buftype = CIFS_NO_BUFFER;
2664         int rc;
2665
2666
2667         rc = smb2_query_info_compound(xid, tcon, "",
2668                                       FILE_READ_ATTRIBUTES,
2669                                       FS_FULL_SIZE_INFORMATION,
2670                                       SMB2_O_INFO_FILESYSTEM,
2671                                       sizeof(struct smb2_fs_full_size_info),
2672                                       &rsp_iov, &buftype, cifs_sb);
2673         if (rc)
2674                 goto qfs_exit;
2675
2676         rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
2677         buf->f_type = SMB2_SUPER_MAGIC;
2678         info = (struct smb2_fs_full_size_info *)(
2679                 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
2680         rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
2681                                le32_to_cpu(rsp->OutputBufferLength),
2682                                &rsp_iov,
2683                                sizeof(struct smb2_fs_full_size_info));
2684         if (!rc)
2685                 smb2_copy_fs_info_to_kstatfs(info, buf);
2686
2687 qfs_exit:
2688         trace_smb3_qfs_done(xid, tcon->tid, tcon->ses->Suid, tcon->tree_name, rc);
2689         free_rsp_buf(buftype, rsp_iov.iov_base);
2690         return rc;
2691 }
2692
2693 static int
2694 smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2695                struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
2696 {
2697         int rc;
2698         __le16 srch_path = 0; /* Null - open root of share */
2699         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2700         struct cifs_open_parms oparms;
2701         struct cifs_fid fid;
2702
2703         if (!tcon->posix_extensions)
2704                 return smb2_queryfs(xid, tcon, cifs_sb, buf);
2705
2706         oparms = (struct cifs_open_parms) {
2707                 .tcon = tcon,
2708                 .path = "",
2709                 .desired_access = FILE_READ_ATTRIBUTES,
2710                 .disposition = FILE_OPEN,
2711                 .create_options = cifs_create_options(cifs_sb, 0),
2712                 .fid = &fid,
2713         };
2714
2715         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
2716                        NULL, NULL);
2717         if (rc)
2718                 return rc;
2719
2720         rc = SMB311_posix_qfs_info(xid, tcon, fid.persistent_fid,
2721                                    fid.volatile_fid, buf);
2722         buf->f_type = SMB2_SUPER_MAGIC;
2723         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2724         return rc;
2725 }
2726
2727 static bool
2728 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
2729 {
2730         return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
2731                ob1->fid.volatile_fid == ob2->fid.volatile_fid;
2732 }
2733
2734 static int
2735 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
2736                __u64 length, __u32 type, int lock, int unlock, bool wait)
2737 {
2738         if (unlock && !lock)
2739                 type = SMB2_LOCKFLAG_UNLOCK;
2740         return SMB2_lock(xid, tlink_tcon(cfile->tlink),
2741                          cfile->fid.persistent_fid, cfile->fid.volatile_fid,
2742                          current->tgid, length, offset, type, wait);
2743 }
2744
2745 static void
2746 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
2747 {
2748         memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
2749 }
2750
2751 static void
2752 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
2753 {
2754         memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
2755 }
2756
2757 static void
2758 smb2_new_lease_key(struct cifs_fid *fid)
2759 {
2760         generate_random_uuid(fid->lease_key);
2761 }
2762
2763 static int
2764 smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
2765                    const char *search_name,
2766                    struct dfs_info3_param **target_nodes,
2767                    unsigned int *num_of_nodes,
2768                    const struct nls_table *nls_codepage, int remap)
2769 {
2770         int rc;
2771         __le16 *utf16_path = NULL;
2772         int utf16_path_len = 0;
2773         struct cifs_tcon *tcon;
2774         struct fsctl_get_dfs_referral_req *dfs_req = NULL;
2775         struct get_dfs_referral_rsp *dfs_rsp = NULL;
2776         u32 dfs_req_size = 0, dfs_rsp_size = 0;
2777         int retry_count = 0;
2778
2779         cifs_dbg(FYI, "%s: path: %s\n", __func__, search_name);
2780
2781         /*
2782          * Try to use the IPC tcon, otherwise just use any
2783          */
2784         tcon = ses->tcon_ipc;
2785         if (tcon == NULL) {
2786                 spin_lock(&cifs_tcp_ses_lock);
2787                 tcon = list_first_entry_or_null(&ses->tcon_list,
2788                                                 struct cifs_tcon,
2789                                                 tcon_list);
2790                 if (tcon)
2791                         tcon->tc_count++;
2792                 spin_unlock(&cifs_tcp_ses_lock);
2793         }
2794
2795         if (tcon == NULL) {
2796                 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n",
2797                          ses);
2798                 rc = -ENOTCONN;
2799                 goto out;
2800         }
2801
2802         utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX,
2803                                            &utf16_path_len,
2804                                            nls_codepage, remap);
2805         if (!utf16_path) {
2806                 rc = -ENOMEM;
2807                 goto out;
2808         }
2809
2810         dfs_req_size = sizeof(*dfs_req) + utf16_path_len;
2811         dfs_req = kzalloc(dfs_req_size, GFP_KERNEL);
2812         if (!dfs_req) {
2813                 rc = -ENOMEM;
2814                 goto out;
2815         }
2816
2817         /* Highest DFS referral version understood */
2818         dfs_req->MaxReferralLevel = DFS_VERSION;
2819
2820         /* Path to resolve in an UTF-16 null-terminated string */
2821         memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len);
2822
2823         do {
2824                 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
2825                                 FSCTL_DFS_GET_REFERRALS,
2826                                 (char *)dfs_req, dfs_req_size, CIFSMaxBufSize,
2827                                 (char **)&dfs_rsp, &dfs_rsp_size);
2828                 if (!is_retryable_error(rc))
2829                         break;
2830                 usleep_range(512, 2048);
2831         } while (++retry_count < 5);
2832
2833         if (rc) {
2834                 if (!is_retryable_error(rc) && rc != -ENOENT && rc != -EOPNOTSUPP)
2835                         cifs_tcon_dbg(VFS, "%s: ioctl error: rc=%d\n", __func__, rc);
2836                 goto out;
2837         }
2838
2839         rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size,
2840                                  num_of_nodes, target_nodes,
2841                                  nls_codepage, remap, search_name,
2842                                  true /* is_unicode */);
2843         if (rc) {
2844                 cifs_tcon_dbg(VFS, "parse error in %s rc=%d\n", __func__, rc);
2845                 goto out;
2846         }
2847
2848  out:
2849         if (tcon && !tcon->ipc) {
2850                 /* ipc tcons are not refcounted */
2851                 spin_lock(&cifs_tcp_ses_lock);
2852                 tcon->tc_count--;
2853                 /* tc_count can never go negative */
2854                 WARN_ON(tcon->tc_count < 0);
2855                 spin_unlock(&cifs_tcp_ses_lock);
2856         }
2857         kfree(utf16_path);
2858         kfree(dfs_req);
2859         kfree(dfs_rsp);
2860         return rc;
2861 }
2862
2863 static int
2864 parse_reparse_posix(struct reparse_posix_data *symlink_buf,
2865                       u32 plen, char **target_path,
2866                       struct cifs_sb_info *cifs_sb)
2867 {
2868         unsigned int len;
2869
2870         /* See MS-FSCC 2.1.2.6 for the 'NFS' style reparse tags */
2871         len = le16_to_cpu(symlink_buf->ReparseDataLength);
2872
2873         if (le64_to_cpu(symlink_buf->InodeType) != NFS_SPECFILE_LNK) {
2874                 cifs_dbg(VFS, "%lld not a supported symlink type\n",
2875                         le64_to_cpu(symlink_buf->InodeType));
2876                 return -EOPNOTSUPP;
2877         }
2878
2879         *target_path = cifs_strndup_from_utf16(
2880                                 symlink_buf->PathBuffer,
2881                                 len, true, cifs_sb->local_nls);
2882         if (!(*target_path))
2883                 return -ENOMEM;
2884
2885         convert_delimiter(*target_path, '/');
2886         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
2887
2888         return 0;
2889 }
2890
2891 static int
2892 parse_reparse_symlink(struct reparse_symlink_data_buffer *symlink_buf,
2893                       u32 plen, char **target_path,
2894                       struct cifs_sb_info *cifs_sb)
2895 {
2896         unsigned int sub_len;
2897         unsigned int sub_offset;
2898
2899         /* We handle Symbolic Link reparse tag here. See: MS-FSCC 2.1.2.4 */
2900
2901         sub_offset = le16_to_cpu(symlink_buf->SubstituteNameOffset);
2902         sub_len = le16_to_cpu(symlink_buf->SubstituteNameLength);
2903         if (sub_offset + 20 > plen ||
2904             sub_offset + sub_len + 20 > plen) {
2905                 cifs_dbg(VFS, "srv returned malformed symlink buffer\n");
2906                 return -EIO;
2907         }
2908
2909         *target_path = cifs_strndup_from_utf16(
2910                                 symlink_buf->PathBuffer + sub_offset,
2911                                 sub_len, true, cifs_sb->local_nls);
2912         if (!(*target_path))
2913                 return -ENOMEM;
2914
2915         convert_delimiter(*target_path, '/');
2916         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
2917
2918         return 0;
2919 }
2920
2921 static int
2922 parse_reparse_point(struct reparse_data_buffer *buf,
2923                     u32 plen, char **target_path,
2924                     struct cifs_sb_info *cifs_sb)
2925 {
2926         if (plen < sizeof(struct reparse_data_buffer)) {
2927                 cifs_dbg(VFS, "reparse buffer is too small. Must be at least 8 bytes but was %d\n",
2928                          plen);
2929                 return -EIO;
2930         }
2931
2932         if (plen < le16_to_cpu(buf->ReparseDataLength) +
2933             sizeof(struct reparse_data_buffer)) {
2934                 cifs_dbg(VFS, "srv returned invalid reparse buf length: %d\n",
2935                          plen);
2936                 return -EIO;
2937         }
2938
2939         /* See MS-FSCC 2.1.2 */
2940         switch (le32_to_cpu(buf->ReparseTag)) {
2941         case IO_REPARSE_TAG_NFS:
2942                 return parse_reparse_posix(
2943                         (struct reparse_posix_data *)buf,
2944                         plen, target_path, cifs_sb);
2945         case IO_REPARSE_TAG_SYMLINK:
2946                 return parse_reparse_symlink(
2947                         (struct reparse_symlink_data_buffer *)buf,
2948                         plen, target_path, cifs_sb);
2949         default:
2950                 cifs_dbg(VFS, "srv returned unknown symlink buffer tag:0x%08x\n",
2951                          le32_to_cpu(buf->ReparseTag));
2952                 return -EOPNOTSUPP;
2953         }
2954 }
2955
2956 static int smb2_query_symlink(const unsigned int xid,
2957                               struct cifs_tcon *tcon,
2958                               struct cifs_sb_info *cifs_sb,
2959                               const char *full_path,
2960                               char **target_path,
2961                               struct kvec *rsp_iov)
2962 {
2963         struct reparse_data_buffer *buf;
2964         struct smb2_ioctl_rsp *io = rsp_iov->iov_base;
2965         u32 plen = le32_to_cpu(io->OutputCount);
2966
2967         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
2968
2969         buf = (struct reparse_data_buffer *)((u8 *)io +
2970                                              le32_to_cpu(io->OutputOffset));
2971         return parse_reparse_point(buf, plen, target_path, cifs_sb);
2972 }
2973
2974 static int smb2_query_reparse_point(const unsigned int xid,
2975                                     struct cifs_tcon *tcon,
2976                                     struct cifs_sb_info *cifs_sb,
2977                                     const char *full_path,
2978                                     u32 *tag, struct kvec *rsp,
2979                                     int *rsp_buftype)
2980 {
2981         struct smb2_compound_vars *vars;
2982         int rc;
2983         __le16 *utf16_path = NULL;
2984         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2985         struct cifs_open_parms oparms;
2986         struct cifs_fid fid;
2987         struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
2988         int flags = CIFS_CP_CREATE_CLOSE_OP;
2989         struct smb_rqst *rqst;
2990         int resp_buftype[3];
2991         struct kvec *rsp_iov;
2992         struct smb2_ioctl_rsp *ioctl_rsp;
2993         struct reparse_data_buffer *reparse_buf;
2994         u32 plen;
2995
2996         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
2997
2998         if (smb3_encryption_required(tcon))
2999                 flags |= CIFS_TRANSFORM_REQ;
3000
3001         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
3002         if (!utf16_path)
3003                 return -ENOMEM;
3004
3005         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
3006         vars = kzalloc(sizeof(*vars), GFP_KERNEL);
3007         if (!vars) {
3008                 rc = -ENOMEM;
3009                 goto out_free_path;
3010         }
3011         rqst = vars->rqst;
3012         rsp_iov = vars->rsp_iov;
3013
3014         /*
3015          * setup smb2open - TODO add optimization to call cifs_get_readable_path
3016          * to see if there is a handle already open that we can use
3017          */
3018         rqst[0].rq_iov = vars->open_iov;
3019         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
3020
3021         oparms = (struct cifs_open_parms) {
3022                 .tcon = tcon,
3023                 .path = full_path,
3024                 .desired_access = FILE_READ_ATTRIBUTES,
3025                 .disposition = FILE_OPEN,
3026                 .create_options = cifs_create_options(cifs_sb, OPEN_REPARSE_POINT),
3027                 .fid = &fid,
3028         };
3029
3030         rc = SMB2_open_init(tcon, server,
3031                             &rqst[0], &oplock, &oparms, utf16_path);
3032         if (rc)
3033                 goto query_rp_exit;
3034         smb2_set_next_command(tcon, &rqst[0]);
3035
3036
3037         /* IOCTL */
3038         rqst[1].rq_iov = vars->io_iov;
3039         rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
3040
3041         rc = SMB2_ioctl_init(tcon, server,
3042                              &rqst[1], COMPOUND_FID,
3043                              COMPOUND_FID, FSCTL_GET_REPARSE_POINT, NULL, 0,
3044                              CIFSMaxBufSize -
3045                              MAX_SMB2_CREATE_RESPONSE_SIZE -
3046                              MAX_SMB2_CLOSE_RESPONSE_SIZE);
3047         if (rc)
3048                 goto query_rp_exit;
3049
3050         smb2_set_next_command(tcon, &rqst[1]);
3051         smb2_set_related(&rqst[1]);
3052
3053         /* Close */
3054         rqst[2].rq_iov = &vars->close_iov;
3055         rqst[2].rq_nvec = 1;
3056
3057         rc = SMB2_close_init(tcon, server,
3058                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
3059         if (rc)
3060                 goto query_rp_exit;
3061
3062         smb2_set_related(&rqst[2]);
3063
3064         rc = compound_send_recv(xid, tcon->ses, server,
3065                                 flags, 3, rqst,
3066                                 resp_buftype, rsp_iov);
3067
3068         ioctl_rsp = rsp_iov[1].iov_base;
3069
3070         /*
3071          * Open was successful and we got an ioctl response.
3072          */
3073         if (rc == 0) {
3074                 /* See MS-FSCC 2.3.23 */
3075
3076                 reparse_buf = (struct reparse_data_buffer *)
3077                         ((char *)ioctl_rsp +
3078                          le32_to_cpu(ioctl_rsp->OutputOffset));
3079                 plen = le32_to_cpu(ioctl_rsp->OutputCount);
3080
3081                 if (plen + le32_to_cpu(ioctl_rsp->OutputOffset) >
3082                     rsp_iov[1].iov_len) {
3083                         cifs_tcon_dbg(FYI, "srv returned invalid ioctl len: %d\n",
3084                                  plen);
3085                         rc = -EIO;
3086                         goto query_rp_exit;
3087                 }
3088                 *tag = le32_to_cpu(reparse_buf->ReparseTag);
3089                 *rsp = rsp_iov[1];
3090                 *rsp_buftype = resp_buftype[1];
3091                 resp_buftype[1] = CIFS_NO_BUFFER;
3092         }
3093
3094  query_rp_exit:
3095         SMB2_open_free(&rqst[0]);
3096         SMB2_ioctl_free(&rqst[1]);
3097         SMB2_close_free(&rqst[2]);
3098         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
3099         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
3100         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
3101         kfree(vars);
3102 out_free_path:
3103         kfree(utf16_path);
3104         return rc;
3105 }
3106
3107 static struct cifs_ntsd *
3108 get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb,
3109                     const struct cifs_fid *cifsfid, u32 *pacllen, u32 info)
3110 {
3111         struct cifs_ntsd *pntsd = NULL;
3112         unsigned int xid;
3113         int rc = -EOPNOTSUPP;
3114         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3115
3116         if (IS_ERR(tlink))
3117                 return ERR_CAST(tlink);
3118
3119         xid = get_xid();
3120         cifs_dbg(FYI, "trying to get acl\n");
3121
3122         rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid,
3123                             cifsfid->volatile_fid, (void **)&pntsd, pacllen,
3124                             info);
3125         free_xid(xid);
3126
3127         cifs_put_tlink(tlink);
3128
3129         cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
3130         if (rc)
3131                 return ERR_PTR(rc);
3132         return pntsd;
3133
3134 }
3135
3136 static struct cifs_ntsd *
3137 get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb,
3138                      const char *path, u32 *pacllen, u32 info)
3139 {
3140         struct cifs_ntsd *pntsd = NULL;
3141         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3142         unsigned int xid;
3143         int rc;
3144         struct cifs_tcon *tcon;
3145         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3146         struct cifs_fid fid;
3147         struct cifs_open_parms oparms;
3148         __le16 *utf16_path;
3149
3150         cifs_dbg(FYI, "get smb3 acl for path %s\n", path);
3151         if (IS_ERR(tlink))
3152                 return ERR_CAST(tlink);
3153
3154         tcon = tlink_tcon(tlink);
3155         xid = get_xid();
3156
3157         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
3158         if (!utf16_path) {
3159                 rc = -ENOMEM;
3160                 free_xid(xid);
3161                 return ERR_PTR(rc);
3162         }
3163
3164         oparms = (struct cifs_open_parms) {
3165                 .tcon = tcon,
3166                 .path = path,
3167                 .desired_access = READ_CONTROL,
3168                 .disposition = FILE_OPEN,
3169                 /*
3170                  * When querying an ACL, even if the file is a symlink
3171                  * we want to open the source not the target, and so
3172                  * the protocol requires that the client specify this
3173                  * flag when opening a reparse point
3174                  */
3175                 .create_options = cifs_create_options(cifs_sb, 0) |
3176                                   OPEN_REPARSE_POINT,
3177                 .fid = &fid,
3178         };
3179
3180         if (info & SACL_SECINFO)
3181                 oparms.desired_access |= SYSTEM_SECURITY;
3182
3183         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
3184                        NULL);
3185         kfree(utf16_path);
3186         if (!rc) {
3187                 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3188                                     fid.volatile_fid, (void **)&pntsd, pacllen,
3189                                     info);
3190                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3191         }
3192
3193         cifs_put_tlink(tlink);
3194         free_xid(xid);
3195
3196         cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
3197         if (rc)
3198                 return ERR_PTR(rc);
3199         return pntsd;
3200 }
3201
3202 static int
3203 set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
3204                 struct inode *inode, const char *path, int aclflag)
3205 {
3206         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3207         unsigned int xid;
3208         int rc, access_flags = 0;
3209         struct cifs_tcon *tcon;
3210         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
3211         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3212         struct cifs_fid fid;
3213         struct cifs_open_parms oparms;
3214         __le16 *utf16_path;
3215
3216         cifs_dbg(FYI, "set smb3 acl for path %s\n", path);
3217         if (IS_ERR(tlink))
3218                 return PTR_ERR(tlink);
3219
3220         tcon = tlink_tcon(tlink);
3221         xid = get_xid();
3222
3223         if (aclflag & CIFS_ACL_OWNER || aclflag & CIFS_ACL_GROUP)
3224                 access_flags |= WRITE_OWNER;
3225         if (aclflag & CIFS_ACL_SACL)
3226                 access_flags |= SYSTEM_SECURITY;
3227         if (aclflag & CIFS_ACL_DACL)
3228                 access_flags |= WRITE_DAC;
3229
3230         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
3231         if (!utf16_path) {
3232                 rc = -ENOMEM;
3233                 free_xid(xid);
3234                 return rc;
3235         }
3236
3237         oparms = (struct cifs_open_parms) {
3238                 .tcon = tcon,
3239                 .desired_access = access_flags,
3240                 .create_options = cifs_create_options(cifs_sb, 0),
3241                 .disposition = FILE_OPEN,
3242                 .path = path,
3243                 .fid = &fid,
3244         };
3245
3246         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL,
3247                        NULL, NULL);
3248         kfree(utf16_path);
3249         if (!rc) {
3250                 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3251                             fid.volatile_fid, pnntsd, acllen, aclflag);
3252                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3253         }
3254
3255         cifs_put_tlink(tlink);
3256         free_xid(xid);
3257         return rc;
3258 }
3259
3260 /* Retrieve an ACL from the server */
3261 static struct cifs_ntsd *
3262 get_smb2_acl(struct cifs_sb_info *cifs_sb,
3263              struct inode *inode, const char *path,
3264              u32 *pacllen, u32 info)
3265 {
3266         struct cifs_ntsd *pntsd = NULL;
3267         struct cifsFileInfo *open_file = NULL;
3268
3269         if (inode && !(info & SACL_SECINFO))
3270                 open_file = find_readable_file(CIFS_I(inode), true);
3271         if (!open_file || (info & SACL_SECINFO))
3272                 return get_smb2_acl_by_path(cifs_sb, path, pacllen, info);
3273
3274         pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen, info);
3275         cifsFileInfo_put(open_file);
3276         return pntsd;
3277 }
3278
3279 static long smb3_zero_data(struct file *file, struct cifs_tcon *tcon,
3280                              loff_t offset, loff_t len, unsigned int xid)
3281 {
3282         struct cifsFileInfo *cfile = file->private_data;
3283         struct file_zero_data_information fsctl_buf;
3284
3285         cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3286
3287         fsctl_buf.FileOffset = cpu_to_le64(offset);
3288         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3289
3290         return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3291                           cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
3292                           (char *)&fsctl_buf,
3293                           sizeof(struct file_zero_data_information),
3294                           0, NULL, NULL);
3295 }
3296
3297 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
3298                             loff_t offset, loff_t len, bool keep_size)
3299 {
3300         struct cifs_ses *ses = tcon->ses;
3301         struct inode *inode = file_inode(file);
3302         struct cifsInodeInfo *cifsi = CIFS_I(inode);
3303         struct cifsFileInfo *cfile = file->private_data;
3304         long rc;
3305         unsigned int xid;
3306         __le64 eof;
3307
3308         xid = get_xid();
3309
3310         trace_smb3_zero_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3311                               ses->Suid, offset, len);
3312
3313         inode_lock(inode);
3314         filemap_invalidate_lock(inode->i_mapping);
3315
3316         /*
3317          * We zero the range through ioctl, so we need remove the page caches
3318          * first, otherwise the data may be inconsistent with the server.
3319          */
3320         truncate_pagecache_range(inode, offset, offset + len - 1);
3321
3322         /* if file not oplocked can't be sure whether asking to extend size */
3323         rc = -EOPNOTSUPP;
3324         if (keep_size == false && !CIFS_CACHE_READ(cifsi))
3325                 goto zero_range_exit;
3326
3327         rc = smb3_zero_data(file, tcon, offset, len, xid);
3328         if (rc < 0)
3329                 goto zero_range_exit;
3330
3331         /*
3332          * do we also need to change the size of the file?
3333          */
3334         if (keep_size == false && i_size_read(inode) < offset + len) {
3335                 eof = cpu_to_le64(offset + len);
3336                 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3337                                   cfile->fid.volatile_fid, cfile->pid, &eof);
3338         }
3339
3340  zero_range_exit:
3341         filemap_invalidate_unlock(inode->i_mapping);
3342         inode_unlock(inode);
3343         free_xid(xid);
3344         if (rc)
3345                 trace_smb3_zero_err(xid, cfile->fid.persistent_fid, tcon->tid,
3346                               ses->Suid, offset, len, rc);
3347         else
3348                 trace_smb3_zero_done(xid, cfile->fid.persistent_fid, tcon->tid,
3349                               ses->Suid, offset, len);
3350         return rc;
3351 }
3352
3353 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
3354                             loff_t offset, loff_t len)
3355 {
3356         struct inode *inode = file_inode(file);
3357         struct cifsFileInfo *cfile = file->private_data;
3358         struct file_zero_data_information fsctl_buf;
3359         long rc;
3360         unsigned int xid;
3361         __u8 set_sparse = 1;
3362
3363         xid = get_xid();
3364
3365         inode_lock(inode);
3366         /* Need to make file sparse, if not already, before freeing range. */
3367         /* Consider adding equivalent for compressed since it could also work */
3368         if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) {
3369                 rc = -EOPNOTSUPP;
3370                 goto out;
3371         }
3372
3373         filemap_invalidate_lock(inode->i_mapping);
3374         /*
3375          * We implement the punch hole through ioctl, so we need remove the page
3376          * caches first, otherwise the data may be inconsistent with the server.
3377          */
3378         truncate_pagecache_range(inode, offset, offset + len - 1);
3379
3380         cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3381
3382         fsctl_buf.FileOffset = cpu_to_le64(offset);
3383         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3384
3385         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3386                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
3387                         (char *)&fsctl_buf,
3388                         sizeof(struct file_zero_data_information),
3389                         CIFSMaxBufSize, NULL, NULL);
3390         filemap_invalidate_unlock(inode->i_mapping);
3391 out:
3392         inode_unlock(inode);
3393         free_xid(xid);
3394         return rc;
3395 }
3396
3397 static int smb3_simple_fallocate_write_range(unsigned int xid,
3398                                              struct cifs_tcon *tcon,
3399                                              struct cifsFileInfo *cfile,
3400                                              loff_t off, loff_t len,
3401                                              char *buf)
3402 {
3403         struct cifs_io_parms io_parms = {0};
3404         int nbytes;
3405         int rc = 0;
3406         struct kvec iov[2];
3407
3408         io_parms.netfid = cfile->fid.netfid;
3409         io_parms.pid = current->tgid;
3410         io_parms.tcon = tcon;
3411         io_parms.persistent_fid = cfile->fid.persistent_fid;
3412         io_parms.volatile_fid = cfile->fid.volatile_fid;
3413
3414         while (len) {
3415                 io_parms.offset = off;
3416                 io_parms.length = len;
3417                 if (io_parms.length > SMB2_MAX_BUFFER_SIZE)
3418                         io_parms.length = SMB2_MAX_BUFFER_SIZE;
3419                 /* iov[0] is reserved for smb header */
3420                 iov[1].iov_base = buf;
3421                 iov[1].iov_len = io_parms.length;
3422                 rc = SMB2_write(xid, &io_parms, &nbytes, iov, 1);
3423                 if (rc)
3424                         break;
3425                 if (nbytes > len)
3426                         return -EINVAL;
3427                 buf += nbytes;
3428                 off += nbytes;
3429                 len -= nbytes;
3430         }
3431         return rc;
3432 }
3433
3434 static int smb3_simple_fallocate_range(unsigned int xid,
3435                                        struct cifs_tcon *tcon,
3436                                        struct cifsFileInfo *cfile,
3437                                        loff_t off, loff_t len)
3438 {
3439         struct file_allocated_range_buffer in_data, *out_data = NULL, *tmp_data;
3440         u32 out_data_len;
3441         char *buf = NULL;
3442         loff_t l;
3443         int rc;
3444
3445         in_data.file_offset = cpu_to_le64(off);
3446         in_data.length = cpu_to_le64(len);
3447         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3448                         cfile->fid.volatile_fid,
3449                         FSCTL_QUERY_ALLOCATED_RANGES,
3450                         (char *)&in_data, sizeof(in_data),
3451                         1024 * sizeof(struct file_allocated_range_buffer),
3452                         (char **)&out_data, &out_data_len);
3453         if (rc)
3454                 goto out;
3455
3456         buf = kzalloc(1024 * 1024, GFP_KERNEL);
3457         if (buf == NULL) {
3458                 rc = -ENOMEM;
3459                 goto out;
3460         }
3461
3462         tmp_data = out_data;
3463         while (len) {
3464                 /*
3465                  * The rest of the region is unmapped so write it all.
3466                  */
3467                 if (out_data_len == 0) {
3468                         rc = smb3_simple_fallocate_write_range(xid, tcon,
3469                                                cfile, off, len, buf);
3470                         goto out;
3471                 }
3472
3473                 if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3474                         rc = -EINVAL;
3475                         goto out;
3476                 }
3477
3478                 if (off < le64_to_cpu(tmp_data->file_offset)) {
3479                         /*
3480                          * We are at a hole. Write until the end of the region
3481                          * or until the next allocated data,
3482                          * whichever comes next.
3483                          */
3484                         l = le64_to_cpu(tmp_data->file_offset) - off;
3485                         if (len < l)
3486                                 l = len;
3487                         rc = smb3_simple_fallocate_write_range(xid, tcon,
3488                                                cfile, off, l, buf);
3489                         if (rc)
3490                                 goto out;
3491                         off = off + l;
3492                         len = len - l;
3493                         if (len == 0)
3494                                 goto out;
3495                 }
3496                 /*
3497                  * We are at a section of allocated data, just skip forward
3498                  * until the end of the data or the end of the region
3499                  * we are supposed to fallocate, whichever comes first.
3500                  */
3501                 l = le64_to_cpu(tmp_data->length);
3502                 if (len < l)
3503                         l = len;
3504                 off += l;
3505                 len -= l;
3506
3507                 tmp_data = &tmp_data[1];
3508                 out_data_len -= sizeof(struct file_allocated_range_buffer);
3509         }
3510
3511  out:
3512         kfree(out_data);
3513         kfree(buf);
3514         return rc;
3515 }
3516
3517
3518 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
3519                             loff_t off, loff_t len, bool keep_size)
3520 {
3521         struct inode *inode;
3522         struct cifsInodeInfo *cifsi;
3523         struct cifsFileInfo *cfile = file->private_data;
3524         long rc = -EOPNOTSUPP;
3525         unsigned int xid;
3526         __le64 eof;
3527
3528         xid = get_xid();
3529
3530         inode = d_inode(cfile->dentry);
3531         cifsi = CIFS_I(inode);
3532
3533         trace_smb3_falloc_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3534                                 tcon->ses->Suid, off, len);
3535         /* if file not oplocked can't be sure whether asking to extend size */
3536         if (!CIFS_CACHE_READ(cifsi))
3537                 if (keep_size == false) {
3538                         trace_smb3_falloc_err(xid, cfile->fid.persistent_fid,
3539                                 tcon->tid, tcon->ses->Suid, off, len, rc);
3540                         free_xid(xid);
3541                         return rc;
3542                 }
3543
3544         /*
3545          * Extending the file
3546          */
3547         if ((keep_size == false) && i_size_read(inode) < off + len) {
3548                 rc = inode_newsize_ok(inode, off + len);
3549                 if (rc)
3550                         goto out;
3551
3552                 if (cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)
3553                         smb2_set_sparse(xid, tcon, cfile, inode, false);
3554
3555                 eof = cpu_to_le64(off + len);
3556                 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3557                                   cfile->fid.volatile_fid, cfile->pid, &eof);
3558                 if (rc == 0) {
3559                         cifsi->server_eof = off + len;
3560                         cifs_setsize(inode, off + len);
3561                         cifs_truncate_page(inode->i_mapping, inode->i_size);
3562                         truncate_setsize(inode, off + len);
3563                 }
3564                 goto out;
3565         }
3566
3567         /*
3568          * Files are non-sparse by default so falloc may be a no-op
3569          * Must check if file sparse. If not sparse, and since we are not
3570          * extending then no need to do anything since file already allocated
3571          */
3572         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
3573                 rc = 0;
3574                 goto out;
3575         }
3576
3577         if (keep_size == true) {
3578                 /*
3579                  * We can not preallocate pages beyond the end of the file
3580                  * in SMB2
3581                  */
3582                 if (off >= i_size_read(inode)) {
3583                         rc = 0;
3584                         goto out;
3585                 }
3586                 /*
3587                  * For fallocates that are partially beyond the end of file,
3588                  * clamp len so we only fallocate up to the end of file.
3589                  */
3590                 if (off + len > i_size_read(inode)) {
3591                         len = i_size_read(inode) - off;
3592                 }
3593         }
3594
3595         if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
3596                 /*
3597                  * At this point, we are trying to fallocate an internal
3598                  * regions of a sparse file. Since smb2 does not have a
3599                  * fallocate command we have two otions on how to emulate this.
3600                  * We can either turn the entire file to become non-sparse
3601                  * which we only do if the fallocate is for virtually
3602                  * the whole file,  or we can overwrite the region with zeroes
3603                  * using SMB2_write, which could be prohibitevly expensive
3604                  * if len is large.
3605                  */
3606                 /*
3607                  * We are only trying to fallocate a small region so
3608                  * just write it with zero.
3609                  */
3610                 if (len <= 1024 * 1024) {
3611                         rc = smb3_simple_fallocate_range(xid, tcon, cfile,
3612                                                          off, len);
3613                         goto out;
3614                 }
3615
3616                 /*
3617                  * Check if falloc starts within first few pages of file
3618                  * and ends within a few pages of the end of file to
3619                  * ensure that most of file is being forced to be
3620                  * fallocated now. If so then setting whole file sparse
3621                  * ie potentially making a few extra pages at the beginning
3622                  * or end of the file non-sparse via set_sparse is harmless.
3623                  */
3624                 if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) {
3625                         rc = -EOPNOTSUPP;
3626                         goto out;
3627                 }
3628         }
3629
3630         smb2_set_sparse(xid, tcon, cfile, inode, false);
3631         rc = 0;
3632
3633 out:
3634         if (rc)
3635                 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid,
3636                                 tcon->ses->Suid, off, len, rc);
3637         else
3638                 trace_smb3_falloc_done(xid, cfile->fid.persistent_fid, tcon->tid,
3639                                 tcon->ses->Suid, off, len);
3640
3641         free_xid(xid);
3642         return rc;
3643 }
3644
3645 static long smb3_collapse_range(struct file *file, struct cifs_tcon *tcon,
3646                             loff_t off, loff_t len)
3647 {
3648         int rc;
3649         unsigned int xid;
3650         struct inode *inode = file_inode(file);
3651         struct cifsFileInfo *cfile = file->private_data;
3652         struct cifsInodeInfo *cifsi = CIFS_I(inode);
3653         __le64 eof;
3654         loff_t old_eof;
3655
3656         xid = get_xid();
3657
3658         inode_lock(inode);
3659
3660         old_eof = i_size_read(inode);
3661         if ((off >= old_eof) ||
3662             off + len >= old_eof) {
3663                 rc = -EINVAL;
3664                 goto out;
3665         }
3666
3667         filemap_invalidate_lock(inode->i_mapping);
3668         rc = filemap_write_and_wait_range(inode->i_mapping, off, old_eof - 1);
3669         if (rc < 0)
3670                 goto out_2;
3671
3672         truncate_pagecache_range(inode, off, old_eof);
3673
3674         rc = smb2_copychunk_range(xid, cfile, cfile, off + len,
3675                                   old_eof - off - len, off);
3676         if (rc < 0)
3677                 goto out_2;
3678
3679         eof = cpu_to_le64(old_eof - len);
3680         rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3681                           cfile->fid.volatile_fid, cfile->pid, &eof);
3682         if (rc < 0)
3683                 goto out_2;
3684
3685         rc = 0;
3686
3687         cifsi->server_eof = i_size_read(inode) - len;
3688         truncate_setsize(inode, cifsi->server_eof);
3689         fscache_resize_cookie(cifs_inode_cookie(inode), cifsi->server_eof);
3690 out_2:
3691         filemap_invalidate_unlock(inode->i_mapping);
3692  out:
3693         inode_unlock(inode);
3694         free_xid(xid);
3695         return rc;
3696 }
3697
3698 static long smb3_insert_range(struct file *file, struct cifs_tcon *tcon,
3699                               loff_t off, loff_t len)
3700 {
3701         int rc;
3702         unsigned int xid;
3703         struct cifsFileInfo *cfile = file->private_data;
3704         struct inode *inode = file_inode(file);
3705         __le64 eof;
3706         __u64  count, old_eof;
3707
3708         xid = get_xid();
3709
3710         inode_lock(inode);
3711
3712         old_eof = i_size_read(inode);
3713         if (off >= old_eof) {
3714                 rc = -EINVAL;
3715                 goto out;
3716         }
3717
3718         count = old_eof - off;
3719         eof = cpu_to_le64(old_eof + len);
3720
3721         filemap_invalidate_lock(inode->i_mapping);
3722         rc = filemap_write_and_wait_range(inode->i_mapping, off, old_eof + len - 1);
3723         if (rc < 0)
3724                 goto out_2;
3725         truncate_pagecache_range(inode, off, old_eof);
3726
3727         rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3728                           cfile->fid.volatile_fid, cfile->pid, &eof);
3729         if (rc < 0)
3730                 goto out_2;
3731
3732         rc = smb2_copychunk_range(xid, cfile, cfile, off, count, off + len);
3733         if (rc < 0)
3734                 goto out_2;
3735
3736         rc = smb3_zero_data(file, tcon, off, len, xid);
3737         if (rc < 0)
3738                 goto out_2;
3739
3740         rc = 0;
3741 out_2:
3742         filemap_invalidate_unlock(inode->i_mapping);
3743  out:
3744         inode_unlock(inode);
3745         free_xid(xid);
3746         return rc;
3747 }
3748
3749 static loff_t smb3_llseek(struct file *file, struct cifs_tcon *tcon, loff_t offset, int whence)
3750 {
3751         struct cifsFileInfo *wrcfile, *cfile = file->private_data;
3752         struct cifsInodeInfo *cifsi;
3753         struct inode *inode;
3754         int rc = 0;
3755         struct file_allocated_range_buffer in_data, *out_data = NULL;
3756         u32 out_data_len;
3757         unsigned int xid;
3758
3759         if (whence != SEEK_HOLE && whence != SEEK_DATA)
3760                 return generic_file_llseek(file, offset, whence);
3761
3762         inode = d_inode(cfile->dentry);
3763         cifsi = CIFS_I(inode);
3764
3765         if (offset < 0 || offset >= i_size_read(inode))
3766                 return -ENXIO;
3767
3768         xid = get_xid();
3769         /*
3770          * We need to be sure that all dirty pages are written as they
3771          * might fill holes on the server.
3772          * Note that we also MUST flush any written pages since at least
3773          * some servers (Windows2016) will not reflect recent writes in
3774          * QUERY_ALLOCATED_RANGES until SMB2_flush is called.
3775          */
3776         wrcfile = find_writable_file(cifsi, FIND_WR_ANY);
3777         if (wrcfile) {
3778                 filemap_write_and_wait(inode->i_mapping);
3779                 smb2_flush_file(xid, tcon, &wrcfile->fid);
3780                 cifsFileInfo_put(wrcfile);
3781         }
3782
3783         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) {
3784                 if (whence == SEEK_HOLE)
3785                         offset = i_size_read(inode);
3786                 goto lseek_exit;
3787         }
3788
3789         in_data.file_offset = cpu_to_le64(offset);
3790         in_data.length = cpu_to_le64(i_size_read(inode));
3791
3792         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3793                         cfile->fid.volatile_fid,
3794                         FSCTL_QUERY_ALLOCATED_RANGES,
3795                         (char *)&in_data, sizeof(in_data),
3796                         sizeof(struct file_allocated_range_buffer),
3797                         (char **)&out_data, &out_data_len);
3798         if (rc == -E2BIG)
3799                 rc = 0;
3800         if (rc)
3801                 goto lseek_exit;
3802
3803         if (whence == SEEK_HOLE && out_data_len == 0)
3804                 goto lseek_exit;
3805
3806         if (whence == SEEK_DATA && out_data_len == 0) {
3807                 rc = -ENXIO;
3808                 goto lseek_exit;
3809         }
3810
3811         if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3812                 rc = -EINVAL;
3813                 goto lseek_exit;
3814         }
3815         if (whence == SEEK_DATA) {
3816                 offset = le64_to_cpu(out_data->file_offset);
3817                 goto lseek_exit;
3818         }
3819         if (offset < le64_to_cpu(out_data->file_offset))
3820                 goto lseek_exit;
3821
3822         offset = le64_to_cpu(out_data->file_offset) + le64_to_cpu(out_data->length);
3823
3824  lseek_exit:
3825         free_xid(xid);
3826         kfree(out_data);
3827         if (!rc)
3828                 return vfs_setpos(file, offset, inode->i_sb->s_maxbytes);
3829         else
3830                 return rc;
3831 }
3832
3833 static int smb3_fiemap(struct cifs_tcon *tcon,
3834                        struct cifsFileInfo *cfile,
3835                        struct fiemap_extent_info *fei, u64 start, u64 len)
3836 {
3837         unsigned int xid;
3838         struct file_allocated_range_buffer in_data, *out_data;
3839         u32 out_data_len;
3840         int i, num, rc, flags, last_blob;
3841         u64 next;
3842
3843         rc = fiemap_prep(d_inode(cfile->dentry), fei, start, &len, 0);
3844         if (rc)
3845                 return rc;
3846
3847         xid = get_xid();
3848  again:
3849         in_data.file_offset = cpu_to_le64(start);
3850         in_data.length = cpu_to_le64(len);
3851
3852         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3853                         cfile->fid.volatile_fid,
3854                         FSCTL_QUERY_ALLOCATED_RANGES,
3855                         (char *)&in_data, sizeof(in_data),
3856                         1024 * sizeof(struct file_allocated_range_buffer),
3857                         (char **)&out_data, &out_data_len);
3858         if (rc == -E2BIG) {
3859                 last_blob = 0;
3860                 rc = 0;
3861         } else
3862                 last_blob = 1;
3863         if (rc)
3864                 goto out;
3865
3866         if (out_data_len && out_data_len < sizeof(struct file_allocated_range_buffer)) {
3867                 rc = -EINVAL;
3868                 goto out;
3869         }
3870         if (out_data_len % sizeof(struct file_allocated_range_buffer)) {
3871                 rc = -EINVAL;
3872                 goto out;
3873         }
3874
3875         num = out_data_len / sizeof(struct file_allocated_range_buffer);
3876         for (i = 0; i < num; i++) {
3877                 flags = 0;
3878                 if (i == num - 1 && last_blob)
3879                         flags |= FIEMAP_EXTENT_LAST;
3880
3881                 rc = fiemap_fill_next_extent(fei,
3882                                 le64_to_cpu(out_data[i].file_offset),
3883                                 le64_to_cpu(out_data[i].file_offset),
3884                                 le64_to_cpu(out_data[i].length),
3885                                 flags);
3886                 if (rc < 0)
3887                         goto out;
3888                 if (rc == 1) {
3889                         rc = 0;
3890                         goto out;
3891                 }
3892         }
3893
3894         if (!last_blob) {
3895                 next = le64_to_cpu(out_data[num - 1].file_offset) +
3896                   le64_to_cpu(out_data[num - 1].length);
3897                 len = len - (next - start);
3898                 start = next;
3899                 goto again;
3900         }
3901
3902  out:
3903         free_xid(xid);
3904         kfree(out_data);
3905         return rc;
3906 }
3907
3908 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
3909                            loff_t off, loff_t len)
3910 {
3911         /* KEEP_SIZE already checked for by do_fallocate */
3912         if (mode & FALLOC_FL_PUNCH_HOLE)
3913                 return smb3_punch_hole(file, tcon, off, len);
3914         else if (mode & FALLOC_FL_ZERO_RANGE) {
3915                 if (mode & FALLOC_FL_KEEP_SIZE)
3916                         return smb3_zero_range(file, tcon, off, len, true);
3917                 return smb3_zero_range(file, tcon, off, len, false);
3918         } else if (mode == FALLOC_FL_KEEP_SIZE)
3919                 return smb3_simple_falloc(file, tcon, off, len, true);
3920         else if (mode == FALLOC_FL_COLLAPSE_RANGE)
3921                 return smb3_collapse_range(file, tcon, off, len);
3922         else if (mode == FALLOC_FL_INSERT_RANGE)
3923                 return smb3_insert_range(file, tcon, off, len);
3924         else if (mode == 0)
3925                 return smb3_simple_falloc(file, tcon, off, len, false);
3926
3927         return -EOPNOTSUPP;
3928 }
3929
3930 static void
3931 smb2_downgrade_oplock(struct TCP_Server_Info *server,
3932                       struct cifsInodeInfo *cinode, __u32 oplock,
3933                       unsigned int epoch, bool *purge_cache)
3934 {
3935         server->ops->set_oplock_level(cinode, oplock, 0, NULL);
3936 }
3937
3938 static void
3939 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3940                        unsigned int epoch, bool *purge_cache);
3941
3942 static void
3943 smb3_downgrade_oplock(struct TCP_Server_Info *server,
3944                        struct cifsInodeInfo *cinode, __u32 oplock,
3945                        unsigned int epoch, bool *purge_cache)
3946 {
3947         unsigned int old_state = cinode->oplock;
3948         unsigned int old_epoch = cinode->epoch;
3949         unsigned int new_state;
3950
3951         if (epoch > old_epoch) {
3952                 smb21_set_oplock_level(cinode, oplock, 0, NULL);
3953                 cinode->epoch = epoch;
3954         }
3955
3956         new_state = cinode->oplock;
3957         *purge_cache = false;
3958
3959         if ((old_state & CIFS_CACHE_READ_FLG) != 0 &&
3960             (new_state & CIFS_CACHE_READ_FLG) == 0)
3961                 *purge_cache = true;
3962         else if (old_state == new_state && (epoch - old_epoch > 1))
3963                 *purge_cache = true;
3964 }
3965
3966 static void
3967 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3968                       unsigned int epoch, bool *purge_cache)
3969 {
3970         oplock &= 0xFF;
3971         cinode->lease_granted = false;
3972         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
3973                 return;
3974         if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
3975                 cinode->oplock = CIFS_CACHE_RHW_FLG;
3976                 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
3977                          &cinode->netfs.inode);
3978         } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
3979                 cinode->oplock = CIFS_CACHE_RW_FLG;
3980                 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
3981                          &cinode->netfs.inode);
3982         } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
3983                 cinode->oplock = CIFS_CACHE_READ_FLG;
3984                 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
3985                          &cinode->netfs.inode);
3986         } else
3987                 cinode->oplock = 0;
3988 }
3989
3990 static void
3991 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3992                        unsigned int epoch, bool *purge_cache)
3993 {
3994         char message[5] = {0};
3995         unsigned int new_oplock = 0;
3996
3997         oplock &= 0xFF;
3998         cinode->lease_granted = true;
3999         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
4000                 return;
4001
4002         /* Check if the server granted an oplock rather than a lease */
4003         if (oplock & SMB2_OPLOCK_LEVEL_EXCLUSIVE)
4004                 return smb2_set_oplock_level(cinode, oplock, epoch,
4005                                              purge_cache);
4006
4007         if (oplock & SMB2_LEASE_READ_CACHING_HE) {
4008                 new_oplock |= CIFS_CACHE_READ_FLG;
4009                 strcat(message, "R");
4010         }
4011         if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
4012                 new_oplock |= CIFS_CACHE_HANDLE_FLG;
4013                 strcat(message, "H");
4014         }
4015         if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
4016                 new_oplock |= CIFS_CACHE_WRITE_FLG;
4017                 strcat(message, "W");
4018         }
4019         if (!new_oplock)
4020                 strncpy(message, "None", sizeof(message));
4021
4022         cinode->oplock = new_oplock;
4023         cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
4024                  &cinode->netfs.inode);
4025 }
4026
4027 static void
4028 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
4029                       unsigned int epoch, bool *purge_cache)
4030 {
4031         unsigned int old_oplock = cinode->oplock;
4032
4033         smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
4034
4035         if (purge_cache) {
4036                 *purge_cache = false;
4037                 if (old_oplock == CIFS_CACHE_READ_FLG) {
4038                         if (cinode->oplock == CIFS_CACHE_READ_FLG &&
4039                             (epoch - cinode->epoch > 0))
4040                                 *purge_cache = true;
4041                         else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
4042                                  (epoch - cinode->epoch > 1))
4043                                 *purge_cache = true;
4044                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
4045                                  (epoch - cinode->epoch > 1))
4046                                 *purge_cache = true;
4047                         else if (cinode->oplock == 0 &&
4048                                  (epoch - cinode->epoch > 0))
4049                                 *purge_cache = true;
4050                 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
4051                         if (cinode->oplock == CIFS_CACHE_RH_FLG &&
4052                             (epoch - cinode->epoch > 0))
4053                                 *purge_cache = true;
4054                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
4055                                  (epoch - cinode->epoch > 1))
4056                                 *purge_cache = true;
4057                 }
4058                 cinode->epoch = epoch;
4059         }
4060 }
4061
4062 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
4063 static bool
4064 smb2_is_read_op(__u32 oplock)
4065 {
4066         return oplock == SMB2_OPLOCK_LEVEL_II;
4067 }
4068 #endif /* CIFS_ALLOW_INSECURE_LEGACY */
4069
4070 static bool
4071 smb21_is_read_op(__u32 oplock)
4072 {
4073         return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
4074                !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
4075 }
4076
4077 static __le32
4078 map_oplock_to_lease(u8 oplock)
4079 {
4080         if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
4081                 return SMB2_LEASE_WRITE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE;
4082         else if (oplock == SMB2_OPLOCK_LEVEL_II)
4083                 return SMB2_LEASE_READ_CACHING_LE;
4084         else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
4085                 return SMB2_LEASE_HANDLE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE |
4086                        SMB2_LEASE_WRITE_CACHING_LE;
4087         return 0;
4088 }
4089
4090 static char *
4091 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
4092 {
4093         struct create_lease *buf;
4094
4095         buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
4096         if (!buf)
4097                 return NULL;
4098
4099         memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
4100         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
4101
4102         buf->ccontext.DataOffset = cpu_to_le16(offsetof
4103                                         (struct create_lease, lcontext));
4104         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
4105         buf->ccontext.NameOffset = cpu_to_le16(offsetof
4106                                 (struct create_lease, Name));
4107         buf->ccontext.NameLength = cpu_to_le16(4);
4108         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
4109         buf->Name[0] = 'R';
4110         buf->Name[1] = 'q';
4111         buf->Name[2] = 'L';
4112         buf->Name[3] = 's';
4113         return (char *)buf;
4114 }
4115
4116 static char *
4117 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
4118 {
4119         struct create_lease_v2 *buf;
4120
4121         buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
4122         if (!buf)
4123                 return NULL;
4124
4125         memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
4126         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
4127
4128         buf->ccontext.DataOffset = cpu_to_le16(offsetof
4129                                         (struct create_lease_v2, lcontext));
4130         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
4131         buf->ccontext.NameOffset = cpu_to_le16(offsetof
4132                                 (struct create_lease_v2, Name));
4133         buf->ccontext.NameLength = cpu_to_le16(4);
4134         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
4135         buf->Name[0] = 'R';
4136         buf->Name[1] = 'q';
4137         buf->Name[2] = 'L';
4138         buf->Name[3] = 's';
4139         return (char *)buf;
4140 }
4141
4142 static __u8
4143 smb2_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
4144 {
4145         struct create_lease *lc = (struct create_lease *)buf;
4146
4147         *epoch = 0; /* not used */
4148         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE)
4149                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
4150         return le32_to_cpu(lc->lcontext.LeaseState);
4151 }
4152
4153 static __u8
4154 smb3_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
4155 {
4156         struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
4157
4158         *epoch = le16_to_cpu(lc->lcontext.Epoch);
4159         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE)
4160                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
4161         if (lease_key)
4162                 memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE);
4163         return le32_to_cpu(lc->lcontext.LeaseState);
4164 }
4165
4166 static unsigned int
4167 smb2_wp_retry_size(struct inode *inode)
4168 {
4169         return min_t(unsigned int, CIFS_SB(inode->i_sb)->ctx->wsize,
4170                      SMB2_MAX_BUFFER_SIZE);
4171 }
4172
4173 static bool
4174 smb2_dir_needs_close(struct cifsFileInfo *cfile)
4175 {
4176         return !cfile->invalidHandle;
4177 }
4178
4179 static void
4180 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len,
4181                    struct smb_rqst *old_rq, __le16 cipher_type)
4182 {
4183         struct smb2_hdr *shdr =
4184                         (struct smb2_hdr *)old_rq->rq_iov[0].iov_base;
4185
4186         memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
4187         tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
4188         tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
4189         tr_hdr->Flags = cpu_to_le16(0x01);
4190         if ((cipher_type == SMB2_ENCRYPTION_AES128_GCM) ||
4191             (cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4192                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
4193         else
4194                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
4195         memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8);
4196 }
4197
4198 static void *smb2_aead_req_alloc(struct crypto_aead *tfm, const struct smb_rqst *rqst,
4199                                  int num_rqst, const u8 *sig, u8 **iv,
4200                                  struct aead_request **req, struct sg_table *sgt,
4201                                  unsigned int *num_sgs, size_t *sensitive_size)
4202 {
4203         unsigned int req_size = sizeof(**req) + crypto_aead_reqsize(tfm);
4204         unsigned int iv_size = crypto_aead_ivsize(tfm);
4205         unsigned int len;
4206         u8 *p;
4207
4208         *num_sgs = cifs_get_num_sgs(rqst, num_rqst, sig);
4209         if (IS_ERR_VALUE((long)(int)*num_sgs))
4210                 return ERR_PTR(*num_sgs);
4211
4212         len = iv_size;
4213         len += crypto_aead_alignmask(tfm) & ~(crypto_tfm_ctx_alignment() - 1);
4214         len = ALIGN(len, crypto_tfm_ctx_alignment());
4215         len += req_size;
4216         len = ALIGN(len, __alignof__(struct scatterlist));
4217         len += array_size(*num_sgs, sizeof(struct scatterlist));
4218         *sensitive_size = len;
4219
4220         p = kvzalloc(len, GFP_NOFS);
4221         if (!p)
4222                 return ERR_PTR(-ENOMEM);
4223
4224         *iv = (u8 *)PTR_ALIGN(p, crypto_aead_alignmask(tfm) + 1);
4225         *req = (struct aead_request *)PTR_ALIGN(*iv + iv_size,
4226                                                 crypto_tfm_ctx_alignment());
4227         sgt->sgl = (struct scatterlist *)PTR_ALIGN((u8 *)*req + req_size,
4228                                                    __alignof__(struct scatterlist));
4229         return p;
4230 }
4231
4232 static void *smb2_get_aead_req(struct crypto_aead *tfm, struct smb_rqst *rqst,
4233                                int num_rqst, const u8 *sig, u8 **iv,
4234                                struct aead_request **req, struct scatterlist **sgl,
4235                                size_t *sensitive_size)
4236 {
4237         struct sg_table sgtable = {};
4238         unsigned int skip, num_sgs, i, j;
4239         ssize_t rc;
4240         void *p;
4241
4242         p = smb2_aead_req_alloc(tfm, rqst, num_rqst, sig, iv, req, &sgtable,
4243                                 &num_sgs, sensitive_size);
4244         if (IS_ERR(p))
4245                 return ERR_CAST(p);
4246
4247         sg_init_marker(sgtable.sgl, num_sgs);
4248
4249         /*
4250          * The first rqst has a transform header where the
4251          * first 20 bytes are not part of the encrypted blob.
4252          */
4253         skip = 20;
4254
4255         for (i = 0; i < num_rqst; i++) {
4256                 struct iov_iter *iter = &rqst[i].rq_iter;
4257                 size_t count = iov_iter_count(iter);
4258
4259                 for (j = 0; j < rqst[i].rq_nvec; j++) {
4260                         cifs_sg_set_buf(&sgtable,
4261                                         rqst[i].rq_iov[j].iov_base + skip,
4262                                         rqst[i].rq_iov[j].iov_len - skip);
4263
4264                         /* See the above comment on the 'skip' assignment */
4265                         skip = 0;
4266                 }
4267                 sgtable.orig_nents = sgtable.nents;
4268
4269                 rc = extract_iter_to_sg(iter, count, &sgtable,
4270                                         num_sgs - sgtable.nents, 0);
4271                 iov_iter_revert(iter, rc);
4272                 sgtable.orig_nents = sgtable.nents;
4273         }
4274
4275         cifs_sg_set_buf(&sgtable, sig, SMB2_SIGNATURE_SIZE);
4276         sg_mark_end(&sgtable.sgl[sgtable.nents - 1]);
4277         *sgl = sgtable.sgl;
4278         return p;
4279 }
4280
4281 static int
4282 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)
4283 {
4284         struct TCP_Server_Info *pserver;
4285         struct cifs_ses *ses;
4286         u8 *ses_enc_key;
4287
4288         /* If server is a channel, select the primary channel */
4289         pserver = SERVER_IS_CHAN(server) ? server->primary_server : server;
4290
4291         spin_lock(&cifs_tcp_ses_lock);
4292         list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) {
4293                 if (ses->Suid == ses_id) {
4294                         spin_lock(&ses->ses_lock);
4295                         ses_enc_key = enc ? ses->smb3encryptionkey :
4296                                 ses->smb3decryptionkey;
4297                         memcpy(key, ses_enc_key, SMB3_ENC_DEC_KEY_SIZE);
4298                         spin_unlock(&ses->ses_lock);
4299                         spin_unlock(&cifs_tcp_ses_lock);
4300                         return 0;
4301                 }
4302         }
4303         spin_unlock(&cifs_tcp_ses_lock);
4304
4305         trace_smb3_ses_not_found(ses_id);
4306
4307         return -EAGAIN;
4308 }
4309 /*
4310  * Encrypt or decrypt @rqst message. @rqst[0] has the following format:
4311  * iov[0]   - transform header (associate data),
4312  * iov[1-N] - SMB2 header and pages - data to encrypt.
4313  * On success return encrypted data in iov[1-N] and pages, leave iov[0]
4314  * untouched.
4315  */
4316 static int
4317 crypt_message(struct TCP_Server_Info *server, int num_rqst,
4318               struct smb_rqst *rqst, int enc)
4319 {
4320         struct smb2_transform_hdr *tr_hdr =
4321                 (struct smb2_transform_hdr *)rqst[0].rq_iov[0].iov_base;
4322         unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20;
4323         int rc = 0;
4324         struct scatterlist *sg;
4325         u8 sign[SMB2_SIGNATURE_SIZE] = {};
4326         u8 key[SMB3_ENC_DEC_KEY_SIZE];
4327         struct aead_request *req;
4328         u8 *iv;
4329         DECLARE_CRYPTO_WAIT(wait);
4330         struct crypto_aead *tfm;
4331         unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
4332         void *creq;
4333         size_t sensitive_size;
4334
4335         rc = smb2_get_enc_key(server, le64_to_cpu(tr_hdr->SessionId), enc, key);
4336         if (rc) {
4337                 cifs_server_dbg(FYI, "%s: Could not get %scryption key. sid: 0x%llx\n", __func__,
4338                          enc ? "en" : "de", le64_to_cpu(tr_hdr->SessionId));
4339                 return rc;
4340         }
4341
4342         rc = smb3_crypto_aead_allocate(server);
4343         if (rc) {
4344                 cifs_server_dbg(VFS, "%s: crypto alloc failed\n", __func__);
4345                 return rc;
4346         }
4347
4348         tfm = enc ? server->secmech.enc : server->secmech.dec;
4349
4350         if ((server->cipher_type == SMB2_ENCRYPTION_AES256_CCM) ||
4351                 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4352                 rc = crypto_aead_setkey(tfm, key, SMB3_GCM256_CRYPTKEY_SIZE);
4353         else
4354                 rc = crypto_aead_setkey(tfm, key, SMB3_GCM128_CRYPTKEY_SIZE);
4355
4356         if (rc) {
4357                 cifs_server_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc);
4358                 return rc;
4359         }
4360
4361         rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE);
4362         if (rc) {
4363                 cifs_server_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc);
4364                 return rc;
4365         }
4366
4367         creq = smb2_get_aead_req(tfm, rqst, num_rqst, sign, &iv, &req, &sg,
4368                                  &sensitive_size);
4369         if (IS_ERR(creq))
4370                 return PTR_ERR(creq);
4371
4372         if (!enc) {
4373                 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE);
4374                 crypt_len += SMB2_SIGNATURE_SIZE;
4375         }
4376
4377         if ((server->cipher_type == SMB2_ENCRYPTION_AES128_GCM) ||
4378             (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4379                 memcpy(iv, (char *)tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
4380         else {
4381                 iv[0] = 3;
4382                 memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
4383         }
4384
4385         aead_request_set_tfm(req, tfm);
4386         aead_request_set_crypt(req, sg, sg, crypt_len, iv);
4387         aead_request_set_ad(req, assoc_data_len);
4388
4389         aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
4390                                   crypto_req_done, &wait);
4391
4392         rc = crypto_wait_req(enc ? crypto_aead_encrypt(req)
4393                                 : crypto_aead_decrypt(req), &wait);
4394
4395         if (!rc && enc)
4396                 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE);
4397
4398         kvfree_sensitive(creq, sensitive_size);
4399         return rc;
4400 }
4401
4402 /*
4403  * Clear a read buffer, discarding the folios which have XA_MARK_0 set.
4404  */
4405 static void cifs_clear_xarray_buffer(struct xarray *buffer)
4406 {
4407         struct folio *folio;
4408
4409         XA_STATE(xas, buffer, 0);
4410
4411         rcu_read_lock();
4412         xas_for_each_marked(&xas, folio, ULONG_MAX, XA_MARK_0) {
4413                 folio_put(folio);
4414         }
4415         rcu_read_unlock();
4416         xa_destroy(buffer);
4417 }
4418
4419 void
4420 smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst)
4421 {
4422         int i;
4423
4424         for (i = 0; i < num_rqst; i++)
4425                 if (!xa_empty(&rqst[i].rq_buffer))
4426                         cifs_clear_xarray_buffer(&rqst[i].rq_buffer);
4427 }
4428
4429 /*
4430  * This function will initialize new_rq and encrypt the content.
4431  * The first entry, new_rq[0], only contains a single iov which contains
4432  * a smb2_transform_hdr and is pre-allocated by the caller.
4433  * This function then populates new_rq[1+] with the content from olq_rq[0+].
4434  *
4435  * The end result is an array of smb_rqst structures where the first structure
4436  * only contains a single iov for the transform header which we then can pass
4437  * to crypt_message().
4438  *
4439  * new_rq[0].rq_iov[0] :  smb2_transform_hdr pre-allocated by the caller
4440  * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests
4441  */
4442 static int
4443 smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst,
4444                        struct smb_rqst *new_rq, struct smb_rqst *old_rq)
4445 {
4446         struct smb2_transform_hdr *tr_hdr = new_rq[0].rq_iov[0].iov_base;
4447         struct page *page;
4448         unsigned int orig_len = 0;
4449         int i, j;
4450         int rc = -ENOMEM;
4451
4452         for (i = 1; i < num_rqst; i++) {
4453                 struct smb_rqst *old = &old_rq[i - 1];
4454                 struct smb_rqst *new = &new_rq[i];
4455                 struct xarray *buffer = &new->rq_buffer;
4456                 size_t size = iov_iter_count(&old->rq_iter), seg, copied = 0;
4457
4458                 orig_len += smb_rqst_len(server, old);
4459                 new->rq_iov = old->rq_iov;
4460                 new->rq_nvec = old->rq_nvec;
4461
4462                 xa_init(buffer);
4463
4464                 if (size > 0) {
4465                         unsigned int npages = DIV_ROUND_UP(size, PAGE_SIZE);
4466
4467                         for (j = 0; j < npages; j++) {
4468                                 void *o;
4469
4470                                 rc = -ENOMEM;
4471                                 page = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
4472                                 if (!page)
4473                                         goto err_free;
4474                                 page->index = j;
4475                                 o = xa_store(buffer, j, page, GFP_KERNEL);
4476                                 if (xa_is_err(o)) {
4477                                         rc = xa_err(o);
4478                                         put_page(page);
4479                                         goto err_free;
4480                                 }
4481
4482                                 xa_set_mark(buffer, j, XA_MARK_0);
4483
4484                                 seg = min_t(size_t, size - copied, PAGE_SIZE);
4485                                 if (copy_page_from_iter(page, 0, seg, &old->rq_iter) != seg) {
4486                                         rc = -EFAULT;
4487                                         goto err_free;
4488                                 }
4489                                 copied += seg;
4490                         }
4491                         iov_iter_xarray(&new->rq_iter, ITER_SOURCE,
4492                                         buffer, 0, size);
4493                         new->rq_iter_size = size;
4494                 }
4495         }
4496
4497         /* fill the 1st iov with a transform header */
4498         fill_transform_hdr(tr_hdr, orig_len, old_rq, server->cipher_type);
4499
4500         rc = crypt_message(server, num_rqst, new_rq, 1);
4501         cifs_dbg(FYI, "Encrypt message returned %d\n", rc);
4502         if (rc)
4503                 goto err_free;
4504
4505         return rc;
4506
4507 err_free:
4508         smb3_free_compound_rqst(num_rqst - 1, &new_rq[1]);
4509         return rc;
4510 }
4511
4512 static int
4513 smb3_is_transform_hdr(void *buf)
4514 {
4515         struct smb2_transform_hdr *trhdr = buf;
4516
4517         return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
4518 }
4519
4520 static int
4521 decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
4522                  unsigned int buf_data_size, struct iov_iter *iter,
4523                  bool is_offloaded)
4524 {
4525         struct kvec iov[2];
4526         struct smb_rqst rqst = {NULL};
4527         size_t iter_size = 0;
4528         int rc;
4529
4530         iov[0].iov_base = buf;
4531         iov[0].iov_len = sizeof(struct smb2_transform_hdr);
4532         iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr);
4533         iov[1].iov_len = buf_data_size;
4534
4535         rqst.rq_iov = iov;
4536         rqst.rq_nvec = 2;
4537         if (iter) {
4538                 rqst.rq_iter = *iter;
4539                 rqst.rq_iter_size = iov_iter_count(iter);
4540                 iter_size = iov_iter_count(iter);
4541         }
4542
4543         rc = crypt_message(server, 1, &rqst, 0);
4544         cifs_dbg(FYI, "Decrypt message returned %d\n", rc);
4545
4546         if (rc)
4547                 return rc;
4548
4549         memmove(buf, iov[1].iov_base, buf_data_size);
4550
4551         if (!is_offloaded)
4552                 server->total_read = buf_data_size + iter_size;
4553
4554         return rc;
4555 }
4556
4557 static int
4558 cifs_copy_pages_to_iter(struct xarray *pages, unsigned int data_size,
4559                         unsigned int skip, struct iov_iter *iter)
4560 {
4561         struct page *page;
4562         unsigned long index;
4563
4564         xa_for_each(pages, index, page) {
4565                 size_t n, len = min_t(unsigned int, PAGE_SIZE - skip, data_size);
4566
4567                 n = copy_page_to_iter(page, skip, len, iter);
4568                 if (n != len) {
4569                         cifs_dbg(VFS, "%s: something went wrong\n", __func__);
4570                         return -EIO;
4571                 }
4572                 data_size -= n;
4573                 skip = 0;
4574         }
4575
4576         return 0;
4577 }
4578
4579 static int
4580 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
4581                  char *buf, unsigned int buf_len, struct xarray *pages,
4582                  unsigned int pages_len, bool is_offloaded)
4583 {
4584         unsigned int data_offset;
4585         unsigned int data_len;
4586         unsigned int cur_off;
4587         unsigned int cur_page_idx;
4588         unsigned int pad_len;
4589         struct cifs_readdata *rdata = mid->callback_data;
4590         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
4591         int length;
4592         bool use_rdma_mr = false;
4593
4594         if (shdr->Command != SMB2_READ) {
4595                 cifs_server_dbg(VFS, "only big read responses are supported\n");
4596                 return -EOPNOTSUPP;
4597         }
4598
4599         if (server->ops->is_session_expired &&
4600             server->ops->is_session_expired(buf)) {
4601                 if (!is_offloaded)
4602                         cifs_reconnect(server, true);
4603                 return -1;
4604         }
4605
4606         if (server->ops->is_status_pending &&
4607                         server->ops->is_status_pending(buf, server))
4608                 return -1;
4609
4610         /* set up first two iov to get credits */
4611         rdata->iov[0].iov_base = buf;
4612         rdata->iov[0].iov_len = 0;
4613         rdata->iov[1].iov_base = buf;
4614         rdata->iov[1].iov_len =
4615                 min_t(unsigned int, buf_len, server->vals->read_rsp_size);
4616         cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
4617                  rdata->iov[0].iov_base, rdata->iov[0].iov_len);
4618         cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n",
4619                  rdata->iov[1].iov_base, rdata->iov[1].iov_len);
4620
4621         rdata->result = server->ops->map_error(buf, true);
4622         if (rdata->result != 0) {
4623                 cifs_dbg(FYI, "%s: server returned error %d\n",
4624                          __func__, rdata->result);
4625                 /* normal error on read response */
4626                 if (is_offloaded)
4627                         mid->mid_state = MID_RESPONSE_RECEIVED;
4628                 else
4629                         dequeue_mid(mid, false);
4630                 return 0;
4631         }
4632
4633         data_offset = server->ops->read_data_offset(buf);
4634 #ifdef CONFIG_CIFS_SMB_DIRECT
4635         use_rdma_mr = rdata->mr;
4636 #endif
4637         data_len = server->ops->read_data_length(buf, use_rdma_mr);
4638
4639         if (data_offset < server->vals->read_rsp_size) {
4640                 /*
4641                  * win2k8 sometimes sends an offset of 0 when the read
4642                  * is beyond the EOF. Treat it as if the data starts just after
4643                  * the header.
4644                  */
4645                 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n",
4646                          __func__, data_offset);
4647                 data_offset = server->vals->read_rsp_size;
4648         } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) {
4649                 /* data_offset is beyond the end of smallbuf */
4650                 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n",
4651                          __func__, data_offset);
4652                 rdata->result = -EIO;
4653                 if (is_offloaded)
4654                         mid->mid_state = MID_RESPONSE_MALFORMED;
4655                 else
4656                         dequeue_mid(mid, rdata->result);
4657                 return 0;
4658         }
4659
4660         pad_len = data_offset - server->vals->read_rsp_size;
4661
4662         if (buf_len <= data_offset) {
4663                 /* read response payload is in pages */
4664                 cur_page_idx = pad_len / PAGE_SIZE;
4665                 cur_off = pad_len % PAGE_SIZE;
4666
4667                 if (cur_page_idx != 0) {
4668                         /* data offset is beyond the 1st page of response */
4669                         cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n",
4670                                  __func__, data_offset);
4671                         rdata->result = -EIO;
4672                         if (is_offloaded)
4673                                 mid->mid_state = MID_RESPONSE_MALFORMED;
4674                         else
4675                                 dequeue_mid(mid, rdata->result);
4676                         return 0;
4677                 }
4678
4679                 if (data_len > pages_len - pad_len) {
4680                         /* data_len is corrupt -- discard frame */
4681                         rdata->result = -EIO;
4682                         if (is_offloaded)
4683                                 mid->mid_state = MID_RESPONSE_MALFORMED;
4684                         else
4685                                 dequeue_mid(mid, rdata->result);
4686                         return 0;
4687                 }
4688
4689                 /* Copy the data to the output I/O iterator. */
4690                 rdata->result = cifs_copy_pages_to_iter(pages, pages_len,
4691                                                         cur_off, &rdata->iter);
4692                 if (rdata->result != 0) {
4693                         if (is_offloaded)
4694                                 mid->mid_state = MID_RESPONSE_MALFORMED;
4695                         else
4696                                 dequeue_mid(mid, rdata->result);
4697                         return 0;
4698                 }
4699                 rdata->got_bytes = pages_len;
4700
4701         } else if (buf_len >= data_offset + data_len) {
4702                 /* read response payload is in buf */
4703                 WARN_ONCE(pages && !xa_empty(pages),
4704                           "read data can be either in buf or in pages");
4705                 length = copy_to_iter(buf + data_offset, data_len, &rdata->iter);
4706                 if (length < 0)
4707                         return length;
4708                 rdata->got_bytes = data_len;
4709         } else {
4710                 /* read response payload cannot be in both buf and pages */
4711                 WARN_ONCE(1, "buf can not contain only a part of read data");
4712                 rdata->result = -EIO;
4713                 if (is_offloaded)
4714                         mid->mid_state = MID_RESPONSE_MALFORMED;
4715                 else
4716                         dequeue_mid(mid, rdata->result);
4717                 return 0;
4718         }
4719
4720         if (is_offloaded)
4721                 mid->mid_state = MID_RESPONSE_RECEIVED;
4722         else
4723                 dequeue_mid(mid, false);
4724         return 0;
4725 }
4726
4727 struct smb2_decrypt_work {
4728         struct work_struct decrypt;
4729         struct TCP_Server_Info *server;
4730         struct xarray buffer;
4731         char *buf;
4732         unsigned int len;
4733 };
4734
4735
4736 static void smb2_decrypt_offload(struct work_struct *work)
4737 {
4738         struct smb2_decrypt_work *dw = container_of(work,
4739                                 struct smb2_decrypt_work, decrypt);
4740         int rc;
4741         struct mid_q_entry *mid;
4742         struct iov_iter iter;
4743
4744         iov_iter_xarray(&iter, ITER_DEST, &dw->buffer, 0, dw->len);
4745         rc = decrypt_raw_data(dw->server, dw->buf, dw->server->vals->read_rsp_size,
4746                               &iter, true);
4747         if (rc) {
4748                 cifs_dbg(VFS, "error decrypting rc=%d\n", rc);
4749                 goto free_pages;
4750         }
4751
4752         dw->server->lstrp = jiffies;
4753         mid = smb2_find_dequeue_mid(dw->server, dw->buf);
4754         if (mid == NULL)
4755                 cifs_dbg(FYI, "mid not found\n");
4756         else {
4757                 mid->decrypted = true;
4758                 rc = handle_read_data(dw->server, mid, dw->buf,
4759                                       dw->server->vals->read_rsp_size,
4760                                       &dw->buffer, dw->len,
4761                                       true);
4762                 if (rc >= 0) {
4763 #ifdef CONFIG_CIFS_STATS2
4764                         mid->when_received = jiffies;
4765 #endif
4766                         if (dw->server->ops->is_network_name_deleted)
4767                                 dw->server->ops->is_network_name_deleted(dw->buf,
4768                                                                          dw->server);
4769
4770                         mid->callback(mid);
4771                 } else {
4772                         spin_lock(&dw->server->srv_lock);
4773                         if (dw->server->tcpStatus == CifsNeedReconnect) {
4774                                 spin_lock(&dw->server->mid_lock);
4775                                 mid->mid_state = MID_RETRY_NEEDED;
4776                                 spin_unlock(&dw->server->mid_lock);
4777                                 spin_unlock(&dw->server->srv_lock);
4778                                 mid->callback(mid);
4779                         } else {
4780                                 spin_lock(&dw->server->mid_lock);
4781                                 mid->mid_state = MID_REQUEST_SUBMITTED;
4782                                 mid->mid_flags &= ~(MID_DELETED);
4783                                 list_add_tail(&mid->qhead,
4784                                         &dw->server->pending_mid_q);
4785                                 spin_unlock(&dw->server->mid_lock);
4786                                 spin_unlock(&dw->server->srv_lock);
4787                         }
4788                 }
4789                 release_mid(mid);
4790         }
4791
4792 free_pages:
4793         cifs_clear_xarray_buffer(&dw->buffer);
4794         cifs_small_buf_release(dw->buf);
4795         kfree(dw);
4796 }
4797
4798
4799 static int
4800 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid,
4801                        int *num_mids)
4802 {
4803         struct page *page;
4804         char *buf = server->smallbuf;
4805         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
4806         struct iov_iter iter;
4807         unsigned int len, npages;
4808         unsigned int buflen = server->pdu_size;
4809         int rc;
4810         int i = 0;
4811         struct smb2_decrypt_work *dw;
4812
4813         dw = kzalloc(sizeof(struct smb2_decrypt_work), GFP_KERNEL);
4814         if (!dw)
4815                 return -ENOMEM;
4816         xa_init(&dw->buffer);
4817         INIT_WORK(&dw->decrypt, smb2_decrypt_offload);
4818         dw->server = server;
4819
4820         *num_mids = 1;
4821         len = min_t(unsigned int, buflen, server->vals->read_rsp_size +
4822                 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1;
4823
4824         rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len);
4825         if (rc < 0)
4826                 goto free_dw;
4827         server->total_read += rc;
4828
4829         len = le32_to_cpu(tr_hdr->OriginalMessageSize) -
4830                 server->vals->read_rsp_size;
4831         dw->len = len;
4832         npages = DIV_ROUND_UP(len, PAGE_SIZE);
4833
4834         rc = -ENOMEM;
4835         for (; i < npages; i++) {
4836                 void *old;
4837
4838                 page = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
4839                 if (!page)
4840                         goto discard_data;
4841                 page->index = i;
4842                 old = xa_store(&dw->buffer, i, page, GFP_KERNEL);
4843                 if (xa_is_err(old)) {
4844                         rc = xa_err(old);
4845                         put_page(page);
4846                         goto discard_data;
4847                 }
4848                 xa_set_mark(&dw->buffer, i, XA_MARK_0);
4849         }
4850
4851         iov_iter_xarray(&iter, ITER_DEST, &dw->buffer, 0, npages * PAGE_SIZE);
4852
4853         /* Read the data into the buffer and clear excess bufferage. */
4854         rc = cifs_read_iter_from_socket(server, &iter, dw->len);
4855         if (rc < 0)
4856                 goto discard_data;
4857
4858         server->total_read += rc;
4859         if (rc < npages * PAGE_SIZE)
4860                 iov_iter_zero(npages * PAGE_SIZE - rc, &iter);
4861         iov_iter_revert(&iter, npages * PAGE_SIZE);
4862         iov_iter_truncate(&iter, dw->len);
4863
4864         rc = cifs_discard_remaining_data(server);
4865         if (rc)
4866                 goto free_pages;
4867
4868         /*
4869          * For large reads, offload to different thread for better performance,
4870          * use more cores decrypting which can be expensive
4871          */
4872
4873         if ((server->min_offload) && (server->in_flight > 1) &&
4874             (server->pdu_size >= server->min_offload)) {
4875                 dw->buf = server->smallbuf;
4876                 server->smallbuf = (char *)cifs_small_buf_get();
4877
4878                 queue_work(decrypt_wq, &dw->decrypt);
4879                 *num_mids = 0; /* worker thread takes care of finding mid */
4880                 return -1;
4881         }
4882
4883         rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size,
4884                               &iter, false);
4885         if (rc)
4886                 goto free_pages;
4887
4888         *mid = smb2_find_mid(server, buf);
4889         if (*mid == NULL) {
4890                 cifs_dbg(FYI, "mid not found\n");
4891         } else {
4892                 cifs_dbg(FYI, "mid found\n");
4893                 (*mid)->decrypted = true;
4894                 rc = handle_read_data(server, *mid, buf,
4895                                       server->vals->read_rsp_size,
4896                                       &dw->buffer, dw->len, false);
4897                 if (rc >= 0) {
4898                         if (server->ops->is_network_name_deleted) {
4899                                 server->ops->is_network_name_deleted(buf,
4900                                                                 server);
4901                         }
4902                 }
4903         }
4904
4905 free_pages:
4906         cifs_clear_xarray_buffer(&dw->buffer);
4907 free_dw:
4908         kfree(dw);
4909         return rc;
4910 discard_data:
4911         cifs_discard_remaining_data(server);
4912         goto free_pages;
4913 }
4914
4915 static int
4916 receive_encrypted_standard(struct TCP_Server_Info *server,
4917                            struct mid_q_entry **mids, char **bufs,
4918                            int *num_mids)
4919 {
4920         int ret, length;
4921         char *buf = server->smallbuf;
4922         struct smb2_hdr *shdr;
4923         unsigned int pdu_length = server->pdu_size;
4924         unsigned int buf_size;
4925         struct mid_q_entry *mid_entry;
4926         int next_is_large;
4927         char *next_buffer = NULL;
4928
4929         *num_mids = 0;
4930
4931         /* switch to large buffer if too big for a small one */
4932         if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) {
4933                 server->large_buf = true;
4934                 memcpy(server->bigbuf, buf, server->total_read);
4935                 buf = server->bigbuf;
4936         }
4937
4938         /* now read the rest */
4939         length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
4940                                 pdu_length - HEADER_SIZE(server) + 1);
4941         if (length < 0)
4942                 return length;
4943         server->total_read += length;
4944
4945         buf_size = pdu_length - sizeof(struct smb2_transform_hdr);
4946         length = decrypt_raw_data(server, buf, buf_size, NULL, false);
4947         if (length)
4948                 return length;
4949
4950         next_is_large = server->large_buf;
4951 one_more:
4952         shdr = (struct smb2_hdr *)buf;
4953         if (shdr->NextCommand) {
4954                 if (next_is_large)
4955                         next_buffer = (char *)cifs_buf_get();
4956                 else
4957                         next_buffer = (char *)cifs_small_buf_get();
4958                 memcpy(next_buffer,
4959                        buf + le32_to_cpu(shdr->NextCommand),
4960                        pdu_length - le32_to_cpu(shdr->NextCommand));
4961         }
4962
4963         mid_entry = smb2_find_mid(server, buf);
4964         if (mid_entry == NULL)
4965                 cifs_dbg(FYI, "mid not found\n");
4966         else {
4967                 cifs_dbg(FYI, "mid found\n");
4968                 mid_entry->decrypted = true;
4969                 mid_entry->resp_buf_size = server->pdu_size;
4970         }
4971
4972         if (*num_mids >= MAX_COMPOUND) {
4973                 cifs_server_dbg(VFS, "too many PDUs in compound\n");
4974                 return -1;
4975         }
4976         bufs[*num_mids] = buf;
4977         mids[(*num_mids)++] = mid_entry;
4978
4979         if (mid_entry && mid_entry->handle)
4980                 ret = mid_entry->handle(server, mid_entry);
4981         else
4982                 ret = cifs_handle_standard(server, mid_entry);
4983
4984         if (ret == 0 && shdr->NextCommand) {
4985                 pdu_length -= le32_to_cpu(shdr->NextCommand);
4986                 server->large_buf = next_is_large;
4987                 if (next_is_large)
4988                         server->bigbuf = buf = next_buffer;
4989                 else
4990                         server->smallbuf = buf = next_buffer;
4991                 goto one_more;
4992         } else if (ret != 0) {
4993                 /*
4994                  * ret != 0 here means that we didn't get to handle_mid() thus
4995                  * server->smallbuf and server->bigbuf are still valid. We need
4996                  * to free next_buffer because it is not going to be used
4997                  * anywhere.
4998                  */
4999                 if (next_is_large)
5000                         free_rsp_buf(CIFS_LARGE_BUFFER, next_buffer);
5001                 else
5002                         free_rsp_buf(CIFS_SMALL_BUFFER, next_buffer);
5003         }
5004
5005         return ret;
5006 }
5007
5008 static int
5009 smb3_receive_transform(struct TCP_Server_Info *server,
5010                        struct mid_q_entry **mids, char **bufs, int *num_mids)
5011 {
5012         char *buf = server->smallbuf;
5013         unsigned int pdu_length = server->pdu_size;
5014         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
5015         unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
5016
5017         if (pdu_length < sizeof(struct smb2_transform_hdr) +
5018                                                 sizeof(struct smb2_hdr)) {
5019                 cifs_server_dbg(VFS, "Transform message is too small (%u)\n",
5020                          pdu_length);
5021                 cifs_reconnect(server, true);
5022                 return -ECONNABORTED;
5023         }
5024
5025         if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) {
5026                 cifs_server_dbg(VFS, "Transform message is broken\n");
5027                 cifs_reconnect(server, true);
5028                 return -ECONNABORTED;
5029         }
5030
5031         /* TODO: add support for compounds containing READ. */
5032         if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server)) {
5033                 return receive_encrypted_read(server, &mids[0], num_mids);
5034         }
5035
5036         return receive_encrypted_standard(server, mids, bufs, num_mids);
5037 }
5038
5039 int
5040 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid)
5041 {
5042         char *buf = server->large_buf ? server->bigbuf : server->smallbuf;
5043
5044         return handle_read_data(server, mid, buf, server->pdu_size,
5045                                 NULL, 0, false);
5046 }
5047
5048 static int
5049 smb2_next_header(char *buf)
5050 {
5051         struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
5052         struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf;
5053
5054         if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM)
5055                 return sizeof(struct smb2_transform_hdr) +
5056                   le32_to_cpu(t_hdr->OriginalMessageSize);
5057
5058         return le32_to_cpu(hdr->NextCommand);
5059 }
5060
5061 static int
5062 smb2_make_node(unsigned int xid, struct inode *inode,
5063                struct dentry *dentry, struct cifs_tcon *tcon,
5064                const char *full_path, umode_t mode, dev_t dev)
5065 {
5066         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
5067         int rc = -EPERM;
5068         struct cifs_open_info_data buf = {};
5069         struct cifs_io_parms io_parms = {0};
5070         __u32 oplock = 0;
5071         struct cifs_fid fid;
5072         struct cifs_open_parms oparms;
5073         unsigned int bytes_written;
5074         struct win_dev *pdev;
5075         struct kvec iov[2];
5076
5077         /*
5078          * Check if mounted with mount parm 'sfu' mount parm.
5079          * SFU emulation should work with all servers, but only
5080          * supports block and char device (no socket & fifo),
5081          * and was used by default in earlier versions of Windows
5082          */
5083         if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL))
5084                 return rc;
5085
5086         /*
5087          * TODO: Add ability to create instead via reparse point. Windows (e.g.
5088          * their current NFS server) uses this approach to expose special files
5089          * over SMB2/SMB3 and Samba will do this with SMB3.1.1 POSIX Extensions
5090          */
5091
5092         if (!S_ISCHR(mode) && !S_ISBLK(mode) && !S_ISFIFO(mode))
5093                 return rc;
5094
5095         cifs_dbg(FYI, "sfu compat create special file\n");
5096
5097         oparms = (struct cifs_open_parms) {
5098                 .tcon = tcon,
5099                 .cifs_sb = cifs_sb,
5100                 .desired_access = GENERIC_WRITE,
5101                 .create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR |
5102                                                       CREATE_OPTION_SPECIAL),
5103                 .disposition = FILE_CREATE,
5104                 .path = full_path,
5105                 .fid = &fid,
5106         };
5107
5108         if (tcon->ses->server->oplocks)
5109                 oplock = REQ_OPLOCK;
5110         else
5111                 oplock = 0;
5112         rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, &buf);
5113         if (rc)
5114                 return rc;
5115
5116         /*
5117          * BB Do not bother to decode buf since no local inode yet to put
5118          * timestamps in, but we can reuse it safely.
5119          */
5120
5121         pdev = (struct win_dev *)&buf.fi;
5122         io_parms.pid = current->tgid;
5123         io_parms.tcon = tcon;
5124         io_parms.offset = 0;
5125         io_parms.length = sizeof(struct win_dev);
5126         iov[1].iov_base = &buf.fi;
5127         iov[1].iov_len = sizeof(struct win_dev);
5128         if (S_ISCHR(mode)) {
5129                 memcpy(pdev->type, "IntxCHR", 8);
5130                 pdev->major = cpu_to_le64(MAJOR(dev));
5131                 pdev->minor = cpu_to_le64(MINOR(dev));
5132                 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
5133                                                         &bytes_written, iov, 1);
5134         } else if (S_ISBLK(mode)) {
5135                 memcpy(pdev->type, "IntxBLK", 8);
5136                 pdev->major = cpu_to_le64(MAJOR(dev));
5137                 pdev->minor = cpu_to_le64(MINOR(dev));
5138                 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
5139                                                         &bytes_written, iov, 1);
5140         } else if (S_ISFIFO(mode)) {
5141                 memcpy(pdev->type, "LnxFIFO", 8);
5142                 pdev->major = 0;
5143                 pdev->minor = 0;
5144                 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
5145                                                         &bytes_written, iov, 1);
5146         }
5147         tcon->ses->server->ops->close(xid, tcon, &fid);
5148         d_drop(dentry);
5149
5150         /* FIXME: add code here to set EAs */
5151
5152         cifs_free_open_info(&buf);
5153         return rc;
5154 }
5155
5156 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
5157 struct smb_version_operations smb20_operations = {
5158         .compare_fids = smb2_compare_fids,
5159         .setup_request = smb2_setup_request,
5160         .setup_async_request = smb2_setup_async_request,
5161         .check_receive = smb2_check_receive,
5162         .add_credits = smb2_add_credits,
5163         .set_credits = smb2_set_credits,
5164         .get_credits_field = smb2_get_credits_field,
5165         .get_credits = smb2_get_credits,
5166         .wait_mtu_credits = cifs_wait_mtu_credits,
5167         .get_next_mid = smb2_get_next_mid,
5168         .revert_current_mid = smb2_revert_current_mid,
5169         .read_data_offset = smb2_read_data_offset,
5170         .read_data_length = smb2_read_data_length,
5171         .map_error = map_smb2_to_linux_error,
5172         .find_mid = smb2_find_mid,
5173         .check_message = smb2_check_message,
5174         .dump_detail = smb2_dump_detail,
5175         .clear_stats = smb2_clear_stats,
5176         .print_stats = smb2_print_stats,
5177         .is_oplock_break = smb2_is_valid_oplock_break,
5178         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5179         .downgrade_oplock = smb2_downgrade_oplock,
5180         .need_neg = smb2_need_neg,
5181         .negotiate = smb2_negotiate,
5182         .negotiate_wsize = smb2_negotiate_wsize,
5183         .negotiate_rsize = smb2_negotiate_rsize,
5184         .sess_setup = SMB2_sess_setup,
5185         .logoff = SMB2_logoff,
5186         .tree_connect = SMB2_tcon,
5187         .tree_disconnect = SMB2_tdis,
5188         .qfs_tcon = smb2_qfs_tcon,
5189         .is_path_accessible = smb2_is_path_accessible,
5190         .can_echo = smb2_can_echo,
5191         .echo = SMB2_echo,
5192         .query_path_info = smb2_query_path_info,
5193         .query_reparse_point = smb2_query_reparse_point,
5194         .get_srv_inum = smb2_get_srv_inum,
5195         .query_file_info = smb2_query_file_info,
5196         .set_path_size = smb2_set_path_size,
5197         .set_file_size = smb2_set_file_size,
5198         .set_file_info = smb2_set_file_info,
5199         .set_compression = smb2_set_compression,
5200         .mkdir = smb2_mkdir,
5201         .mkdir_setinfo = smb2_mkdir_setinfo,
5202         .rmdir = smb2_rmdir,
5203         .unlink = smb2_unlink,
5204         .rename = smb2_rename_path,
5205         .create_hardlink = smb2_create_hardlink,
5206         .query_symlink = smb2_query_symlink,
5207         .query_mf_symlink = smb3_query_mf_symlink,
5208         .create_mf_symlink = smb3_create_mf_symlink,
5209         .open = smb2_open_file,
5210         .set_fid = smb2_set_fid,
5211         .close = smb2_close_file,
5212         .flush = smb2_flush_file,
5213         .async_readv = smb2_async_readv,
5214         .async_writev = smb2_async_writev,
5215         .sync_read = smb2_sync_read,
5216         .sync_write = smb2_sync_write,
5217         .query_dir_first = smb2_query_dir_first,
5218         .query_dir_next = smb2_query_dir_next,
5219         .close_dir = smb2_close_dir,
5220         .calc_smb_size = smb2_calc_size,
5221         .is_status_pending = smb2_is_status_pending,
5222         .is_session_expired = smb2_is_session_expired,
5223         .oplock_response = smb2_oplock_response,
5224         .queryfs = smb2_queryfs,
5225         .mand_lock = smb2_mand_lock,
5226         .mand_unlock_range = smb2_unlock_range,
5227         .push_mand_locks = smb2_push_mandatory_locks,
5228         .get_lease_key = smb2_get_lease_key,
5229         .set_lease_key = smb2_set_lease_key,
5230         .new_lease_key = smb2_new_lease_key,
5231         .calc_signature = smb2_calc_signature,
5232         .is_read_op = smb2_is_read_op,
5233         .set_oplock_level = smb2_set_oplock_level,
5234         .create_lease_buf = smb2_create_lease_buf,
5235         .parse_lease_buf = smb2_parse_lease_buf,
5236         .copychunk_range = smb2_copychunk_range,
5237         .wp_retry_size = smb2_wp_retry_size,
5238         .dir_needs_close = smb2_dir_needs_close,
5239         .get_dfs_refer = smb2_get_dfs_refer,
5240         .select_sectype = smb2_select_sectype,
5241 #ifdef CONFIG_CIFS_XATTR
5242         .query_all_EAs = smb2_query_eas,
5243         .set_EA = smb2_set_ea,
5244 #endif /* CIFS_XATTR */
5245         .get_acl = get_smb2_acl,
5246         .get_acl_by_fid = get_smb2_acl_by_fid,
5247         .set_acl = set_smb2_acl,
5248         .next_header = smb2_next_header,
5249         .ioctl_query_info = smb2_ioctl_query_info,
5250         .make_node = smb2_make_node,
5251         .fiemap = smb3_fiemap,
5252         .llseek = smb3_llseek,
5253         .is_status_io_timeout = smb2_is_status_io_timeout,
5254         .is_network_name_deleted = smb2_is_network_name_deleted,
5255 };
5256 #endif /* CIFS_ALLOW_INSECURE_LEGACY */
5257
5258 struct smb_version_operations smb21_operations = {
5259         .compare_fids = smb2_compare_fids,
5260         .setup_request = smb2_setup_request,
5261         .setup_async_request = smb2_setup_async_request,
5262         .check_receive = smb2_check_receive,
5263         .add_credits = smb2_add_credits,
5264         .set_credits = smb2_set_credits,
5265         .get_credits_field = smb2_get_credits_field,
5266         .get_credits = smb2_get_credits,
5267         .wait_mtu_credits = smb2_wait_mtu_credits,
5268         .adjust_credits = smb2_adjust_credits,
5269         .get_next_mid = smb2_get_next_mid,
5270         .revert_current_mid = smb2_revert_current_mid,
5271         .read_data_offset = smb2_read_data_offset,
5272         .read_data_length = smb2_read_data_length,
5273         .map_error = map_smb2_to_linux_error,
5274         .find_mid = smb2_find_mid,
5275         .check_message = smb2_check_message,
5276         .dump_detail = smb2_dump_detail,
5277         .clear_stats = smb2_clear_stats,
5278         .print_stats = smb2_print_stats,
5279         .is_oplock_break = smb2_is_valid_oplock_break,
5280         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5281         .downgrade_oplock = smb2_downgrade_oplock,
5282         .need_neg = smb2_need_neg,
5283         .negotiate = smb2_negotiate,
5284         .negotiate_wsize = smb2_negotiate_wsize,
5285         .negotiate_rsize = smb2_negotiate_rsize,
5286         .sess_setup = SMB2_sess_setup,
5287         .logoff = SMB2_logoff,
5288         .tree_connect = SMB2_tcon,
5289         .tree_disconnect = SMB2_tdis,
5290         .qfs_tcon = smb2_qfs_tcon,
5291         .is_path_accessible = smb2_is_path_accessible,
5292         .can_echo = smb2_can_echo,
5293         .echo = SMB2_echo,
5294         .query_path_info = smb2_query_path_info,
5295         .query_reparse_point = smb2_query_reparse_point,
5296         .get_srv_inum = smb2_get_srv_inum,
5297         .query_file_info = smb2_query_file_info,
5298         .set_path_size = smb2_set_path_size,
5299         .set_file_size = smb2_set_file_size,
5300         .set_file_info = smb2_set_file_info,
5301         .set_compression = smb2_set_compression,
5302         .mkdir = smb2_mkdir,
5303         .mkdir_setinfo = smb2_mkdir_setinfo,
5304         .rmdir = smb2_rmdir,
5305         .unlink = smb2_unlink,
5306         .rename = smb2_rename_path,
5307         .create_hardlink = smb2_create_hardlink,
5308         .query_symlink = smb2_query_symlink,
5309         .query_mf_symlink = smb3_query_mf_symlink,
5310         .create_mf_symlink = smb3_create_mf_symlink,
5311         .open = smb2_open_file,
5312         .set_fid = smb2_set_fid,
5313         .close = smb2_close_file,
5314         .flush = smb2_flush_file,
5315         .async_readv = smb2_async_readv,
5316         .async_writev = smb2_async_writev,
5317         .sync_read = smb2_sync_read,
5318         .sync_write = smb2_sync_write,
5319         .query_dir_first = smb2_query_dir_first,
5320         .query_dir_next = smb2_query_dir_next,
5321         .close_dir = smb2_close_dir,
5322         .calc_smb_size = smb2_calc_size,
5323         .is_status_pending = smb2_is_status_pending,
5324         .is_session_expired = smb2_is_session_expired,
5325         .oplock_response = smb2_oplock_response,
5326         .queryfs = smb2_queryfs,
5327         .mand_lock = smb2_mand_lock,
5328         .mand_unlock_range = smb2_unlock_range,
5329         .push_mand_locks = smb2_push_mandatory_locks,
5330         .get_lease_key = smb2_get_lease_key,
5331         .set_lease_key = smb2_set_lease_key,
5332         .new_lease_key = smb2_new_lease_key,
5333         .calc_signature = smb2_calc_signature,
5334         .is_read_op = smb21_is_read_op,
5335         .set_oplock_level = smb21_set_oplock_level,
5336         .create_lease_buf = smb2_create_lease_buf,
5337         .parse_lease_buf = smb2_parse_lease_buf,
5338         .copychunk_range = smb2_copychunk_range,
5339         .wp_retry_size = smb2_wp_retry_size,
5340         .dir_needs_close = smb2_dir_needs_close,
5341         .enum_snapshots = smb3_enum_snapshots,
5342         .notify = smb3_notify,
5343         .get_dfs_refer = smb2_get_dfs_refer,
5344         .select_sectype = smb2_select_sectype,
5345 #ifdef CONFIG_CIFS_XATTR
5346         .query_all_EAs = smb2_query_eas,
5347         .set_EA = smb2_set_ea,
5348 #endif /* CIFS_XATTR */
5349         .get_acl = get_smb2_acl,
5350         .get_acl_by_fid = get_smb2_acl_by_fid,
5351         .set_acl = set_smb2_acl,
5352         .next_header = smb2_next_header,
5353         .ioctl_query_info = smb2_ioctl_query_info,
5354         .make_node = smb2_make_node,
5355         .fiemap = smb3_fiemap,
5356         .llseek = smb3_llseek,
5357         .is_status_io_timeout = smb2_is_status_io_timeout,
5358         .is_network_name_deleted = smb2_is_network_name_deleted,
5359 };
5360
5361 struct smb_version_operations smb30_operations = {
5362         .compare_fids = smb2_compare_fids,
5363         .setup_request = smb2_setup_request,
5364         .setup_async_request = smb2_setup_async_request,
5365         .check_receive = smb2_check_receive,
5366         .add_credits = smb2_add_credits,
5367         .set_credits = smb2_set_credits,
5368         .get_credits_field = smb2_get_credits_field,
5369         .get_credits = smb2_get_credits,
5370         .wait_mtu_credits = smb2_wait_mtu_credits,
5371         .adjust_credits = smb2_adjust_credits,
5372         .get_next_mid = smb2_get_next_mid,
5373         .revert_current_mid = smb2_revert_current_mid,
5374         .read_data_offset = smb2_read_data_offset,
5375         .read_data_length = smb2_read_data_length,
5376         .map_error = map_smb2_to_linux_error,
5377         .find_mid = smb2_find_mid,
5378         .check_message = smb2_check_message,
5379         .dump_detail = smb2_dump_detail,
5380         .clear_stats = smb2_clear_stats,
5381         .print_stats = smb2_print_stats,
5382         .dump_share_caps = smb2_dump_share_caps,
5383         .is_oplock_break = smb2_is_valid_oplock_break,
5384         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5385         .downgrade_oplock = smb3_downgrade_oplock,
5386         .need_neg = smb2_need_neg,
5387         .negotiate = smb2_negotiate,
5388         .negotiate_wsize = smb3_negotiate_wsize,
5389         .negotiate_rsize = smb3_negotiate_rsize,
5390         .sess_setup = SMB2_sess_setup,
5391         .logoff = SMB2_logoff,
5392         .tree_connect = SMB2_tcon,
5393         .tree_disconnect = SMB2_tdis,
5394         .qfs_tcon = smb3_qfs_tcon,
5395         .is_path_accessible = smb2_is_path_accessible,
5396         .can_echo = smb2_can_echo,
5397         .echo = SMB2_echo,
5398         .query_path_info = smb2_query_path_info,
5399         /* WSL tags introduced long after smb2.1, enable for SMB3, 3.11 only */
5400         .query_reparse_point = smb2_query_reparse_point,
5401         .get_srv_inum = smb2_get_srv_inum,
5402         .query_file_info = smb2_query_file_info,
5403         .set_path_size = smb2_set_path_size,
5404         .set_file_size = smb2_set_file_size,
5405         .set_file_info = smb2_set_file_info,
5406         .set_compression = smb2_set_compression,
5407         .mkdir = smb2_mkdir,
5408         .mkdir_setinfo = smb2_mkdir_setinfo,
5409         .rmdir = smb2_rmdir,
5410         .unlink = smb2_unlink,
5411         .rename = smb2_rename_path,
5412         .create_hardlink = smb2_create_hardlink,
5413         .query_symlink = smb2_query_symlink,
5414         .query_mf_symlink = smb3_query_mf_symlink,
5415         .create_mf_symlink = smb3_create_mf_symlink,
5416         .open = smb2_open_file,
5417         .set_fid = smb2_set_fid,
5418         .close = smb2_close_file,
5419         .close_getattr = smb2_close_getattr,
5420         .flush = smb2_flush_file,
5421         .async_readv = smb2_async_readv,
5422         .async_writev = smb2_async_writev,
5423         .sync_read = smb2_sync_read,
5424         .sync_write = smb2_sync_write,
5425         .query_dir_first = smb2_query_dir_first,
5426         .query_dir_next = smb2_query_dir_next,
5427         .close_dir = smb2_close_dir,
5428         .calc_smb_size = smb2_calc_size,
5429         .is_status_pending = smb2_is_status_pending,
5430         .is_session_expired = smb2_is_session_expired,
5431         .oplock_response = smb2_oplock_response,
5432         .queryfs = smb2_queryfs,
5433         .mand_lock = smb2_mand_lock,
5434         .mand_unlock_range = smb2_unlock_range,
5435         .push_mand_locks = smb2_push_mandatory_locks,
5436         .get_lease_key = smb2_get_lease_key,
5437         .set_lease_key = smb2_set_lease_key,
5438         .new_lease_key = smb2_new_lease_key,
5439         .generate_signingkey = generate_smb30signingkey,
5440         .calc_signature = smb3_calc_signature,
5441         .set_integrity  = smb3_set_integrity,
5442         .is_read_op = smb21_is_read_op,
5443         .set_oplock_level = smb3_set_oplock_level,
5444         .create_lease_buf = smb3_create_lease_buf,
5445         .parse_lease_buf = smb3_parse_lease_buf,
5446         .copychunk_range = smb2_copychunk_range,
5447         .duplicate_extents = smb2_duplicate_extents,
5448         .validate_negotiate = smb3_validate_negotiate,
5449         .wp_retry_size = smb2_wp_retry_size,
5450         .dir_needs_close = smb2_dir_needs_close,
5451         .fallocate = smb3_fallocate,
5452         .enum_snapshots = smb3_enum_snapshots,
5453         .notify = smb3_notify,
5454         .init_transform_rq = smb3_init_transform_rq,
5455         .is_transform_hdr = smb3_is_transform_hdr,
5456         .receive_transform = smb3_receive_transform,
5457         .get_dfs_refer = smb2_get_dfs_refer,
5458         .select_sectype = smb2_select_sectype,
5459 #ifdef CONFIG_CIFS_XATTR
5460         .query_all_EAs = smb2_query_eas,
5461         .set_EA = smb2_set_ea,
5462 #endif /* CIFS_XATTR */
5463         .get_acl = get_smb2_acl,
5464         .get_acl_by_fid = get_smb2_acl_by_fid,
5465         .set_acl = set_smb2_acl,
5466         .next_header = smb2_next_header,
5467         .ioctl_query_info = smb2_ioctl_query_info,
5468         .make_node = smb2_make_node,
5469         .fiemap = smb3_fiemap,
5470         .llseek = smb3_llseek,
5471         .is_status_io_timeout = smb2_is_status_io_timeout,
5472         .is_network_name_deleted = smb2_is_network_name_deleted,
5473 };
5474
5475 struct smb_version_operations smb311_operations = {
5476         .compare_fids = smb2_compare_fids,
5477         .setup_request = smb2_setup_request,
5478         .setup_async_request = smb2_setup_async_request,
5479         .check_receive = smb2_check_receive,
5480         .add_credits = smb2_add_credits,
5481         .set_credits = smb2_set_credits,
5482         .get_credits_field = smb2_get_credits_field,
5483         .get_credits = smb2_get_credits,
5484         .wait_mtu_credits = smb2_wait_mtu_credits,
5485         .adjust_credits = smb2_adjust_credits,
5486         .get_next_mid = smb2_get_next_mid,
5487         .revert_current_mid = smb2_revert_current_mid,
5488         .read_data_offset = smb2_read_data_offset,
5489         .read_data_length = smb2_read_data_length,
5490         .map_error = map_smb2_to_linux_error,
5491         .find_mid = smb2_find_mid,
5492         .check_message = smb2_check_message,
5493         .dump_detail = smb2_dump_detail,
5494         .clear_stats = smb2_clear_stats,
5495         .print_stats = smb2_print_stats,
5496         .dump_share_caps = smb2_dump_share_caps,
5497         .is_oplock_break = smb2_is_valid_oplock_break,
5498         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5499         .downgrade_oplock = smb3_downgrade_oplock,
5500         .need_neg = smb2_need_neg,
5501         .negotiate = smb2_negotiate,
5502         .negotiate_wsize = smb3_negotiate_wsize,
5503         .negotiate_rsize = smb3_negotiate_rsize,
5504         .sess_setup = SMB2_sess_setup,
5505         .logoff = SMB2_logoff,
5506         .tree_connect = SMB2_tcon,
5507         .tree_disconnect = SMB2_tdis,
5508         .qfs_tcon = smb3_qfs_tcon,
5509         .is_path_accessible = smb2_is_path_accessible,
5510         .can_echo = smb2_can_echo,
5511         .echo = SMB2_echo,
5512         .query_path_info = smb2_query_path_info,
5513         .query_reparse_point = smb2_query_reparse_point,
5514         .get_srv_inum = smb2_get_srv_inum,
5515         .query_file_info = smb2_query_file_info,
5516         .set_path_size = smb2_set_path_size,
5517         .set_file_size = smb2_set_file_size,
5518         .set_file_info = smb2_set_file_info,
5519         .set_compression = smb2_set_compression,
5520         .mkdir = smb2_mkdir,
5521         .mkdir_setinfo = smb2_mkdir_setinfo,
5522         .posix_mkdir = smb311_posix_mkdir,
5523         .rmdir = smb2_rmdir,
5524         .unlink = smb2_unlink,
5525         .rename = smb2_rename_path,
5526         .create_hardlink = smb2_create_hardlink,
5527         .query_symlink = smb2_query_symlink,
5528         .query_mf_symlink = smb3_query_mf_symlink,
5529         .create_mf_symlink = smb3_create_mf_symlink,
5530         .open = smb2_open_file,
5531         .set_fid = smb2_set_fid,
5532         .close = smb2_close_file,
5533         .close_getattr = smb2_close_getattr,
5534         .flush = smb2_flush_file,
5535         .async_readv = smb2_async_readv,
5536         .async_writev = smb2_async_writev,
5537         .sync_read = smb2_sync_read,
5538         .sync_write = smb2_sync_write,
5539         .query_dir_first = smb2_query_dir_first,
5540         .query_dir_next = smb2_query_dir_next,
5541         .close_dir = smb2_close_dir,
5542         .calc_smb_size = smb2_calc_size,
5543         .is_status_pending = smb2_is_status_pending,
5544         .is_session_expired = smb2_is_session_expired,
5545         .oplock_response = smb2_oplock_response,
5546         .queryfs = smb311_queryfs,
5547         .mand_lock = smb2_mand_lock,
5548         .mand_unlock_range = smb2_unlock_range,
5549         .push_mand_locks = smb2_push_mandatory_locks,
5550         .get_lease_key = smb2_get_lease_key,
5551         .set_lease_key = smb2_set_lease_key,
5552         .new_lease_key = smb2_new_lease_key,
5553         .generate_signingkey = generate_smb311signingkey,
5554         .calc_signature = smb3_calc_signature,
5555         .set_integrity  = smb3_set_integrity,
5556         .is_read_op = smb21_is_read_op,
5557         .set_oplock_level = smb3_set_oplock_level,
5558         .create_lease_buf = smb3_create_lease_buf,
5559         .parse_lease_buf = smb3_parse_lease_buf,
5560         .copychunk_range = smb2_copychunk_range,
5561         .duplicate_extents = smb2_duplicate_extents,
5562 /*      .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
5563         .wp_retry_size = smb2_wp_retry_size,
5564         .dir_needs_close = smb2_dir_needs_close,
5565         .fallocate = smb3_fallocate,
5566         .enum_snapshots = smb3_enum_snapshots,
5567         .notify = smb3_notify,
5568         .init_transform_rq = smb3_init_transform_rq,
5569         .is_transform_hdr = smb3_is_transform_hdr,
5570         .receive_transform = smb3_receive_transform,
5571         .get_dfs_refer = smb2_get_dfs_refer,
5572         .select_sectype = smb2_select_sectype,
5573 #ifdef CONFIG_CIFS_XATTR
5574         .query_all_EAs = smb2_query_eas,
5575         .set_EA = smb2_set_ea,
5576 #endif /* CIFS_XATTR */
5577         .get_acl = get_smb2_acl,
5578         .get_acl_by_fid = get_smb2_acl_by_fid,
5579         .set_acl = set_smb2_acl,
5580         .next_header = smb2_next_header,
5581         .ioctl_query_info = smb2_ioctl_query_info,
5582         .make_node = smb2_make_node,
5583         .fiemap = smb3_fiemap,
5584         .llseek = smb3_llseek,
5585         .is_status_io_timeout = smb2_is_status_io_timeout,
5586         .is_network_name_deleted = smb2_is_network_name_deleted,
5587 };
5588
5589 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
5590 struct smb_version_values smb20_values = {
5591         .version_string = SMB20_VERSION_STRING,
5592         .protocol_id = SMB20_PROT_ID,
5593         .req_capabilities = 0, /* MBZ */
5594         .large_lock_type = 0,
5595         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5596         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5597         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5598         .header_size = sizeof(struct smb2_hdr),
5599         .header_preamble_size = 0,
5600         .max_header_size = MAX_SMB2_HDR_SIZE,
5601         .read_rsp_size = sizeof(struct smb2_read_rsp),
5602         .lock_cmd = SMB2_LOCK,
5603         .cap_unix = 0,
5604         .cap_nt_find = SMB2_NT_FIND,
5605         .cap_large_files = SMB2_LARGE_FILES,
5606         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5607         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5608         .create_lease_size = sizeof(struct create_lease),
5609 };
5610 #endif /* ALLOW_INSECURE_LEGACY */
5611
5612 struct smb_version_values smb21_values = {
5613         .version_string = SMB21_VERSION_STRING,
5614         .protocol_id = SMB21_PROT_ID,
5615         .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
5616         .large_lock_type = 0,
5617         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5618         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5619         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5620         .header_size = sizeof(struct smb2_hdr),
5621         .header_preamble_size = 0,
5622         .max_header_size = MAX_SMB2_HDR_SIZE,
5623         .read_rsp_size = sizeof(struct smb2_read_rsp),
5624         .lock_cmd = SMB2_LOCK,
5625         .cap_unix = 0,
5626         .cap_nt_find = SMB2_NT_FIND,
5627         .cap_large_files = SMB2_LARGE_FILES,
5628         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5629         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5630         .create_lease_size = sizeof(struct create_lease),
5631 };
5632
5633 struct smb_version_values smb3any_values = {
5634         .version_string = SMB3ANY_VERSION_STRING,
5635         .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
5636         .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,
5637         .large_lock_type = 0,
5638         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5639         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5640         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5641         .header_size = sizeof(struct smb2_hdr),
5642         .header_preamble_size = 0,
5643         .max_header_size = MAX_SMB2_HDR_SIZE,
5644         .read_rsp_size = sizeof(struct smb2_read_rsp),
5645         .lock_cmd = SMB2_LOCK,
5646         .cap_unix = 0,
5647         .cap_nt_find = SMB2_NT_FIND,
5648         .cap_large_files = SMB2_LARGE_FILES,
5649         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5650         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5651         .create_lease_size = sizeof(struct create_lease_v2),
5652 };
5653
5654 struct smb_version_values smbdefault_values = {
5655         .version_string = SMBDEFAULT_VERSION_STRING,
5656         .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
5657         .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,
5658         .large_lock_type = 0,
5659         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5660         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5661         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5662         .header_size = sizeof(struct smb2_hdr),
5663         .header_preamble_size = 0,
5664         .max_header_size = MAX_SMB2_HDR_SIZE,
5665         .read_rsp_size = sizeof(struct smb2_read_rsp),
5666         .lock_cmd = SMB2_LOCK,
5667         .cap_unix = 0,
5668         .cap_nt_find = SMB2_NT_FIND,
5669         .cap_large_files = SMB2_LARGE_FILES,
5670         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5671         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5672         .create_lease_size = sizeof(struct create_lease_v2),
5673 };
5674
5675 struct smb_version_values smb30_values = {
5676         .version_string = SMB30_VERSION_STRING,
5677         .protocol_id = SMB30_PROT_ID,
5678         .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,
5679         .large_lock_type = 0,
5680         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5681         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5682         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5683         .header_size = sizeof(struct smb2_hdr),
5684         .header_preamble_size = 0,
5685         .max_header_size = MAX_SMB2_HDR_SIZE,
5686         .read_rsp_size = sizeof(struct smb2_read_rsp),
5687         .lock_cmd = SMB2_LOCK,
5688         .cap_unix = 0,
5689         .cap_nt_find = SMB2_NT_FIND,
5690         .cap_large_files = SMB2_LARGE_FILES,
5691         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5692         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5693         .create_lease_size = sizeof(struct create_lease_v2),
5694 };
5695
5696 struct smb_version_values smb302_values = {
5697         .version_string = SMB302_VERSION_STRING,
5698         .protocol_id = SMB302_PROT_ID,
5699         .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,
5700         .large_lock_type = 0,
5701         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5702         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5703         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5704         .header_size = sizeof(struct smb2_hdr),
5705         .header_preamble_size = 0,
5706         .max_header_size = MAX_SMB2_HDR_SIZE,
5707         .read_rsp_size = sizeof(struct smb2_read_rsp),
5708         .lock_cmd = SMB2_LOCK,
5709         .cap_unix = 0,
5710         .cap_nt_find = SMB2_NT_FIND,
5711         .cap_large_files = SMB2_LARGE_FILES,
5712         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5713         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5714         .create_lease_size = sizeof(struct create_lease_v2),
5715 };
5716
5717 struct smb_version_values smb311_values = {
5718         .version_string = SMB311_VERSION_STRING,
5719         .protocol_id = SMB311_PROT_ID,
5720         .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,
5721         .large_lock_type = 0,
5722         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5723         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5724         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5725         .header_size = sizeof(struct smb2_hdr),
5726         .header_preamble_size = 0,
5727         .max_header_size = MAX_SMB2_HDR_SIZE,
5728         .read_rsp_size = sizeof(struct smb2_read_rsp),
5729         .lock_cmd = SMB2_LOCK,
5730         .cap_unix = 0,
5731         .cap_nt_find = SMB2_NT_FIND,
5732         .cap_large_files = SMB2_LARGE_FILES,
5733         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5734         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5735         .create_lease_size = sizeof(struct create_lease_v2),
5736 };