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         struct TCP_Server_Info *pserver;
 760
 761         /* do not query too frequently */
 762         if (ses->iface_last_update &&
 763             time_before(jiffies, ses->iface_last_update +
 764                         (SMB_INTERFACE_POLL_INTERVAL * HZ)))
 765                 return 0;
 766
 767         rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
 768                         FSCTL_QUERY_NETWORK_INTERFACE_INFO,
 769                         NULL /* no data input */, 0 /* no data input */,
 770                         CIFSMaxBufSize, (char **)&out_buf, &ret_data_len);
 771         if (rc == -EOPNOTSUPP) {
 772                 cifs_dbg(FYI,
 773                          "server does not support query network interfaces\n");
 774                 ret_data_len = 0;
 775         } else if (rc != 0) {
 776                 cifs_tcon_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
 777                 goto out;
 778         }
 779
 780         rc = parse_server_interfaces(out_buf, ret_data_len, ses, in_mount);
 781         if (rc)
 782                 goto out;
 783
 784         /* check if iface is still active */
 785         pserver = ses->chans[0].server;
 786         if (pserver && !cifs_chan_is_iface_active(ses, pserver))
 787                 cifs_chan_update_iface(ses, pserver);
 788
 789 out:
 790         kfree(out_buf);
 791         return rc;
 792 }
 793
 794 static void
 795 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
 796               struct cifs_sb_info *cifs_sb)
 797 {
 798         int rc;
 799         __le16 srch_path = 0; /* Null - open root of share */
 800         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 801         struct cifs_open_parms oparms;
 802         struct cifs_fid fid;
 803         struct cached_fid *cfid = NULL;
 804
 805         oparms = (struct cifs_open_parms) {
 806                 .tcon = tcon,
 807                 .path = "",
 808                 .desired_access = FILE_READ_ATTRIBUTES,
 809                 .disposition = FILE_OPEN,
 810                 .create_options = cifs_create_options(cifs_sb, 0),
 811                 .fid = &fid,
 812         };
 813
 814         rc = open_cached_dir(xid, tcon, "", cifs_sb, false, &cfid);
 815         if (rc == 0)
 816                 memcpy(&fid, &cfid->fid, sizeof(struct cifs_fid));
 817         else
 818                 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
 819                                NULL, NULL);
 820         if (rc)
 821                 return;
 822
 823         SMB3_request_interfaces(xid, tcon, true /* called during  mount */);
 824
 825         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 826                         FS_ATTRIBUTE_INFORMATION);
 827         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 828                         FS_DEVICE_INFORMATION);
 829         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 830                         FS_VOLUME_INFORMATION);
 831         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 832                         FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
 833         if (cfid == NULL)
 834                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 835         else
 836                 close_cached_dir(cfid);
 837 }
 838
 839 static void
 840 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
 841               struct cifs_sb_info *cifs_sb)
 842 {
 843         int rc;
 844         __le16 srch_path = 0; /* Null - open root of share */
 845         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 846         struct cifs_open_parms oparms;
 847         struct cifs_fid fid;
 848
 849         oparms = (struct cifs_open_parms) {
 850                 .tcon = tcon,
 851                 .path = "",
 852                 .desired_access = FILE_READ_ATTRIBUTES,
 853                 .disposition = FILE_OPEN,
 854                 .create_options = cifs_create_options(cifs_sb, 0),
 855                 .fid = &fid,
 856         };
 857
 858         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
 859                        NULL, NULL);
 860         if (rc)
 861                 return;
 862
 863         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 864                         FS_ATTRIBUTE_INFORMATION);
 865         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 866                         FS_DEVICE_INFORMATION);
 867         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 868 }
 869
 870 static int
 871 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
 872                         struct cifs_sb_info *cifs_sb, const char *full_path)
 873 {
 874         __le16 *utf16_path;
 875         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 876         int err_buftype = CIFS_NO_BUFFER;
 877         struct cifs_open_parms oparms;
 878         struct kvec err_iov = {};
 879         struct cifs_fid fid;
 880         struct cached_fid *cfid;
 881         bool islink;
 882         int rc, rc2;
 883
 884         rc = open_cached_dir(xid, tcon, full_path, cifs_sb, true, &cfid);
 885         if (!rc) {
 886                 if (cfid->has_lease) {
 887                         close_cached_dir(cfid);
 888                         return 0;
 889                 }
 890                 close_cached_dir(cfid);
 891         }
 892
 893         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
 894         if (!utf16_path)
 895                 return -ENOMEM;
 896
 897         oparms = (struct cifs_open_parms) {
 898                 .tcon = tcon,
 899                 .path = full_path,
 900                 .desired_access = FILE_READ_ATTRIBUTES,
 901                 .disposition = FILE_OPEN,
 902                 .create_options = cifs_create_options(cifs_sb, 0),
 903                 .fid = &fid,
 904         };
 905
 906         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL,
 907                        &err_iov, &err_buftype);
 908         if (rc) {
 909                 struct smb2_hdr *hdr = err_iov.iov_base;
 910
 911                 if (unlikely(!hdr || err_buftype == CIFS_NO_BUFFER))
 912                         goto out;
 913
 914                 if (rc != -EREMOTE && hdr->Status == STATUS_OBJECT_NAME_INVALID) {
 915                         rc2 = cifs_inval_name_dfs_link_error(xid, tcon, cifs_sb,
 916                                                              full_path, &islink);
 917                         if (rc2) {
 918                                 rc = rc2;
 919                                 goto out;
 920                         }
 921                         if (islink)
 922                                 rc = -EREMOTE;
 923                 }
 924                 if (rc == -EREMOTE && IS_ENABLED(CONFIG_CIFS_DFS_UPCALL) && cifs_sb &&
 925                     (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_DFS))
 926                         rc = -EOPNOTSUPP;
 927                 goto out;
 928         }
 929
 930         rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 931
 932 out:
 933         free_rsp_buf(err_buftype, err_iov.iov_base);
 934         kfree(utf16_path);
 935         return rc;
 936 }
 937
 938 static int smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
 939                              struct cifs_sb_info *cifs_sb, const char *full_path,
 940                              u64 *uniqueid, struct cifs_open_info_data *data)
 941 {
 942         *uniqueid = le64_to_cpu(data->fi.IndexNumber);
 943         return 0;
 944 }
 945
 946 static int smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
 947                                 struct cifsFileInfo *cfile, struct cifs_open_info_data *data)
 948 {
 949         struct cifs_fid *fid = &cfile->fid;
 950
 951         if (cfile->symlink_target) {
 952                 data->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL);
 953                 if (!data->symlink_target)
 954                         return -ENOMEM;
 955         }
 956         return SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid, &data->fi);
 957 }
 958
 959 #ifdef CONFIG_CIFS_XATTR
 960 static ssize_t
 961 move_smb2_ea_to_cifs(char *dst, size_t dst_size,
 962                      struct smb2_file_full_ea_info *src, size_t src_size,
 963                      const unsigned char *ea_name)
 964 {
 965         int rc = 0;
 966         unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0;
 967         char *name, *value;
 968         size_t buf_size = dst_size;
 969         size_t name_len, value_len, user_name_len;
 970
 971         while (src_size > 0) {
 972                 name_len = (size_t)src->ea_name_length;
 973                 value_len = (size_t)le16_to_cpu(src->ea_value_length);
 974
 975                 if (name_len == 0)
 976                         break;
 977
 978                 if (src_size < 8 + name_len + 1 + value_len) {
 979                         cifs_dbg(FYI, "EA entry goes beyond length of list\n");
 980                         rc = -EIO;
 981                         goto out;
 982                 }
 983
 984                 name = &src->ea_data[0];
 985                 value = &src->ea_data[src->ea_name_length + 1];
 986
 987                 if (ea_name) {
 988                         if (ea_name_len == name_len &&
 989                             memcmp(ea_name, name, name_len) == 0) {
 990                                 rc = value_len;
 991                                 if (dst_size == 0)
 992                                         goto out;
 993                                 if (dst_size < value_len) {
 994                                         rc = -ERANGE;
 995                                         goto out;
 996                                 }
 997                                 memcpy(dst, value, value_len);
 998                                 goto out;
 999                         }
1000                 } else {
1001                         /* 'user.' plus a terminating null */
1002                         user_name_len = 5 + 1 + name_len;
1003
1004                         if (buf_size == 0) {
1005                                 /* skip copy - calc size only */
1006                                 rc += user_name_len;
1007                         } else if (dst_size >= user_name_len) {
1008                                 dst_size -= user_name_len;
1009                                 memcpy(dst, "user.", 5);
1010                                 dst += 5;
1011                                 memcpy(dst, src->ea_data, name_len);
1012                                 dst += name_len;
1013                                 *dst = 0;
1014                                 ++dst;
1015                                 rc += user_name_len;
1016                         } else {
1017                                 /* stop before overrun buffer */
1018                                 rc = -ERANGE;
1019                                 break;
1020                         }
1021                 }
1022
1023                 if (!src->next_entry_offset)
1024                         break;
1025
1026                 if (src_size < le32_to_cpu(src->next_entry_offset)) {
1027                         /* stop before overrun buffer */
1028                         rc = -ERANGE;
1029                         break;
1030                 }
1031                 src_size -= le32_to_cpu(src->next_entry_offset);
1032                 src = (void *)((char *)src +
1033                                le32_to_cpu(src->next_entry_offset));
1034         }
1035
1036         /* didn't find the named attribute */
1037         if (ea_name)
1038                 rc = -ENODATA;
1039
1040 out:
1041         return (ssize_t)rc;
1042 }
1043
1044 static ssize_t
1045 smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
1046                const unsigned char *path, const unsigned char *ea_name,
1047                char *ea_data, size_t buf_size,
1048                struct cifs_sb_info *cifs_sb)
1049 {
1050         int rc;
1051         struct kvec rsp_iov = {NULL, 0};
1052         int buftype = CIFS_NO_BUFFER;
1053         struct smb2_query_info_rsp *rsp;
1054         struct smb2_file_full_ea_info *info = NULL;
1055
1056         rc = smb2_query_info_compound(xid, tcon, path,
1057                                       FILE_READ_EA,
1058                                       FILE_FULL_EA_INFORMATION,
1059                                       SMB2_O_INFO_FILE,
1060                                       CIFSMaxBufSize -
1061                                       MAX_SMB2_CREATE_RESPONSE_SIZE -
1062                                       MAX_SMB2_CLOSE_RESPONSE_SIZE,
1063                                       &rsp_iov, &buftype, cifs_sb);
1064         if (rc) {
1065                 /*
1066                  * If ea_name is NULL (listxattr) and there are no EAs,
1067                  * return 0 as it's not an error. Otherwise, the specified
1068                  * ea_name was not found.
1069                  */
1070                 if (!ea_name && rc == -ENODATA)
1071                         rc = 0;
1072                 goto qeas_exit;
1073         }
1074
1075         rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
1076         rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
1077                                le32_to_cpu(rsp->OutputBufferLength),
1078                                &rsp_iov,
1079                                sizeof(struct smb2_file_full_ea_info));
1080         if (rc)
1081                 goto qeas_exit;
1082
1083         info = (struct smb2_file_full_ea_info *)(
1084                         le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
1085         rc = move_smb2_ea_to_cifs(ea_data, buf_size, info,
1086                         le32_to_cpu(rsp->OutputBufferLength), ea_name);
1087
1088  qeas_exit:
1089         free_rsp_buf(buftype, rsp_iov.iov_base);
1090         return rc;
1091 }
1092
1093 static int
1094 smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
1095             const char *path, const char *ea_name, const void *ea_value,
1096             const __u16 ea_value_len, const struct nls_table *nls_codepage,
1097             struct cifs_sb_info *cifs_sb)
1098 {
1099         struct smb2_compound_vars *vars;
1100         struct cifs_ses *ses = tcon->ses;
1101         struct TCP_Server_Info *server = cifs_pick_channel(ses);
1102         struct smb_rqst *rqst;
1103         struct kvec *rsp_iov;
1104         __le16 *utf16_path = NULL;
1105         int ea_name_len = strlen(ea_name);
1106         int flags = CIFS_CP_CREATE_CLOSE_OP;
1107         int len;
1108         int resp_buftype[3];
1109         struct cifs_open_parms oparms;
1110         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1111         struct cifs_fid fid;
1112         unsigned int size[1];
1113         void *data[1];
1114         struct smb2_file_full_ea_info *ea = NULL;
1115         struct smb2_query_info_rsp *rsp;
1116         int rc, used_len = 0;
1117
1118         if (smb3_encryption_required(tcon))
1119                 flags |= CIFS_TRANSFORM_REQ;
1120
1121         if (ea_name_len > 255)
1122                 return -EINVAL;
1123
1124         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1125         if (!utf16_path)
1126                 return -ENOMEM;
1127
1128         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1129         vars = kzalloc(sizeof(*vars), GFP_KERNEL);
1130         if (!vars) {
1131                 rc = -ENOMEM;
1132                 goto out_free_path;
1133         }
1134         rqst = vars->rqst;
1135         rsp_iov = vars->rsp_iov;
1136
1137         if (ses->server->ops->query_all_EAs) {
1138                 if (!ea_value) {
1139                         rc = ses->server->ops->query_all_EAs(xid, tcon, path,
1140                                                              ea_name, NULL, 0,
1141                                                              cifs_sb);
1142                         if (rc == -ENODATA)
1143                                 goto sea_exit;
1144                 } else {
1145                         /* If we are adding a attribute we should first check
1146                          * if there will be enough space available to store
1147                          * the new EA. If not we should not add it since we
1148                          * would not be able to even read the EAs back.
1149                          */
1150                         rc = smb2_query_info_compound(xid, tcon, path,
1151                                       FILE_READ_EA,
1152                                       FILE_FULL_EA_INFORMATION,
1153                                       SMB2_O_INFO_FILE,
1154                                       CIFSMaxBufSize -
1155                                       MAX_SMB2_CREATE_RESPONSE_SIZE -
1156                                       MAX_SMB2_CLOSE_RESPONSE_SIZE,
1157                                       &rsp_iov[1], &resp_buftype[1], cifs_sb);
1158                         if (rc == 0) {
1159                                 rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1160                                 used_len = le32_to_cpu(rsp->OutputBufferLength);
1161                         }
1162                         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1163                         resp_buftype[1] = CIFS_NO_BUFFER;
1164                         memset(&rsp_iov[1], 0, sizeof(rsp_iov[1]));
1165                         rc = 0;
1166
1167                         /* Use a fudge factor of 256 bytes in case we collide
1168                          * with a different set_EAs command.
1169                          */
1170                         if (CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE -
1171                            MAX_SMB2_CLOSE_RESPONSE_SIZE - 256 <
1172                            used_len + ea_name_len + ea_value_len + 1) {
1173                                 rc = -ENOSPC;
1174                                 goto sea_exit;
1175                         }
1176                 }
1177         }
1178
1179         /* Open */
1180         rqst[0].rq_iov = vars->open_iov;
1181         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1182
1183         oparms = (struct cifs_open_parms) {
1184                 .tcon = tcon,
1185                 .path = path,
1186                 .desired_access = FILE_WRITE_EA,
1187                 .disposition = FILE_OPEN,
1188                 .create_options = cifs_create_options(cifs_sb, 0),
1189                 .fid = &fid,
1190         };
1191
1192         rc = SMB2_open_init(tcon, server,
1193                             &rqst[0], &oplock, &oparms, utf16_path);
1194         if (rc)
1195                 goto sea_exit;
1196         smb2_set_next_command(tcon, &rqst[0]);
1197
1198
1199         /* Set Info */
1200         rqst[1].rq_iov = vars->si_iov;
1201         rqst[1].rq_nvec = 1;
1202
1203         len = sizeof(*ea) + ea_name_len + ea_value_len + 1;
1204         ea = kzalloc(len, GFP_KERNEL);
1205         if (ea == NULL) {
1206                 rc = -ENOMEM;
1207                 goto sea_exit;
1208         }
1209
1210         ea->ea_name_length = ea_name_len;
1211         ea->ea_value_length = cpu_to_le16(ea_value_len);
1212         memcpy(ea->ea_data, ea_name, ea_name_len + 1);
1213         memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len);
1214
1215         size[0] = len;
1216         data[0] = ea;
1217
1218         rc = SMB2_set_info_init(tcon, server,
1219                                 &rqst[1], COMPOUND_FID,
1220                                 COMPOUND_FID, current->tgid,
1221                                 FILE_FULL_EA_INFORMATION,
1222                                 SMB2_O_INFO_FILE, 0, data, size);
1223         if (rc)
1224                 goto sea_exit;
1225         smb2_set_next_command(tcon, &rqst[1]);
1226         smb2_set_related(&rqst[1]);
1227
1228         /* Close */
1229         rqst[2].rq_iov = &vars->close_iov;
1230         rqst[2].rq_nvec = 1;
1231         rc = SMB2_close_init(tcon, server,
1232                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
1233         if (rc)
1234                 goto sea_exit;
1235         smb2_set_related(&rqst[2]);
1236
1237         rc = compound_send_recv(xid, ses, server,
1238                                 flags, 3, rqst,
1239                                 resp_buftype, rsp_iov);
1240         /* no need to bump num_remote_opens because handle immediately closed */
1241
1242  sea_exit:
1243         kfree(ea);
1244         SMB2_open_free(&rqst[0]);
1245         SMB2_set_info_free(&rqst[1]);
1246         SMB2_close_free(&rqst[2]);
1247         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1248         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1249         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1250         kfree(vars);
1251 out_free_path:
1252         kfree(utf16_path);
1253         return rc;
1254 }
1255 #endif
1256
1257 static bool
1258 smb2_can_echo(struct TCP_Server_Info *server)
1259 {
1260         return server->echoes;
1261 }
1262
1263 static void
1264 smb2_clear_stats(struct cifs_tcon *tcon)
1265 {
1266         int i;
1267
1268         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
1269                 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
1270                 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
1271         }
1272 }
1273
1274 static void
1275 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
1276 {
1277         seq_puts(m, "\n\tShare Capabilities:");
1278         if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
1279                 seq_puts(m, " DFS,");
1280         if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
1281                 seq_puts(m, " CONTINUOUS AVAILABILITY,");
1282         if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
1283                 seq_puts(m, " SCALEOUT,");
1284         if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
1285                 seq_puts(m, " CLUSTER,");
1286         if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
1287                 seq_puts(m, " ASYMMETRIC,");
1288         if (tcon->capabilities == 0)
1289                 seq_puts(m, " None");
1290         if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
1291                 seq_puts(m, " Aligned,");
1292         if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
1293                 seq_puts(m, " Partition Aligned,");
1294         if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
1295                 seq_puts(m, " SSD,");
1296         if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
1297                 seq_puts(m, " TRIM-support,");
1298
1299         seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
1300         seq_printf(m, "\n\ttid: 0x%x", tcon->tid);
1301         if (tcon->perf_sector_size)
1302                 seq_printf(m, "\tOptimal sector size: 0x%x",
1303                            tcon->perf_sector_size);
1304         seq_printf(m, "\tMaximal Access: 0x%x", tcon->maximal_access);
1305 }
1306
1307 static void
1308 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
1309 {
1310         atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
1311         atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
1312
1313         /*
1314          *  Can't display SMB2_NEGOTIATE, SESSION_SETUP, LOGOFF, CANCEL and ECHO
1315          *  totals (requests sent) since those SMBs are per-session not per tcon
1316          */
1317         seq_printf(m, "\nBytes read: %llu  Bytes written: %llu",
1318                    (long long)(tcon->bytes_read),
1319                    (long long)(tcon->bytes_written));
1320         seq_printf(m, "\nOpen files: %d total (local), %d open on server",
1321                    atomic_read(&tcon->num_local_opens),
1322                    atomic_read(&tcon->num_remote_opens));
1323         seq_printf(m, "\nTreeConnects: %d total %d failed",
1324                    atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
1325                    atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
1326         seq_printf(m, "\nTreeDisconnects: %d total %d failed",
1327                    atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
1328                    atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
1329         seq_printf(m, "\nCreates: %d total %d failed",
1330                    atomic_read(&sent[SMB2_CREATE_HE]),
1331                    atomic_read(&failed[SMB2_CREATE_HE]));
1332         seq_printf(m, "\nCloses: %d total %d failed",
1333                    atomic_read(&sent[SMB2_CLOSE_HE]),
1334                    atomic_read(&failed[SMB2_CLOSE_HE]));
1335         seq_printf(m, "\nFlushes: %d total %d failed",
1336                    atomic_read(&sent[SMB2_FLUSH_HE]),
1337                    atomic_read(&failed[SMB2_FLUSH_HE]));
1338         seq_printf(m, "\nReads: %d total %d failed",
1339                    atomic_read(&sent[SMB2_READ_HE]),
1340                    atomic_read(&failed[SMB2_READ_HE]));
1341         seq_printf(m, "\nWrites: %d total %d failed",
1342                    atomic_read(&sent[SMB2_WRITE_HE]),
1343                    atomic_read(&failed[SMB2_WRITE_HE]));
1344         seq_printf(m, "\nLocks: %d total %d failed",
1345                    atomic_read(&sent[SMB2_LOCK_HE]),
1346                    atomic_read(&failed[SMB2_LOCK_HE]));
1347         seq_printf(m, "\nIOCTLs: %d total %d failed",
1348                    atomic_read(&sent[SMB2_IOCTL_HE]),
1349                    atomic_read(&failed[SMB2_IOCTL_HE]));
1350         seq_printf(m, "\nQueryDirectories: %d total %d failed",
1351                    atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
1352                    atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
1353         seq_printf(m, "\nChangeNotifies: %d total %d failed",
1354                    atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
1355                    atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
1356         seq_printf(m, "\nQueryInfos: %d total %d failed",
1357                    atomic_read(&sent[SMB2_QUERY_INFO_HE]),
1358                    atomic_read(&failed[SMB2_QUERY_INFO_HE]));
1359         seq_printf(m, "\nSetInfos: %d total %d failed",
1360                    atomic_read(&sent[SMB2_SET_INFO_HE]),
1361                    atomic_read(&failed[SMB2_SET_INFO_HE]));
1362         seq_printf(m, "\nOplockBreaks: %d sent %d failed",
1363                    atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
1364                    atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
1365 }
1366
1367 static void
1368 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
1369 {
1370         struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
1371         struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
1372
1373         cfile->fid.persistent_fid = fid->persistent_fid;
1374         cfile->fid.volatile_fid = fid->volatile_fid;
1375         cfile->fid.access = fid->access;
1376 #ifdef CONFIG_CIFS_DEBUG2
1377         cfile->fid.mid = fid->mid;
1378 #endif /* CIFS_DEBUG2 */
1379         server->ops->set_oplock_level(cinode, oplock, fid->epoch,
1380                                       &fid->purge_cache);
1381         cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
1382         memcpy(cfile->fid.create_guid, fid->create_guid, 16);
1383 }
1384
1385 static void
1386 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
1387                 struct cifs_fid *fid)
1388 {
1389         SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1390 }
1391
1392 static void
1393 smb2_close_getattr(const unsigned int xid, struct cifs_tcon *tcon,
1394                    struct cifsFileInfo *cfile)
1395 {
1396         struct smb2_file_network_open_info file_inf;
1397         struct inode *inode;
1398         int rc;
1399
1400         rc = __SMB2_close(xid, tcon, cfile->fid.persistent_fid,
1401                    cfile->fid.volatile_fid, &file_inf);
1402         if (rc)
1403                 return;
1404
1405         inode = d_inode(cfile->dentry);
1406
1407         spin_lock(&inode->i_lock);
1408         CIFS_I(inode)->time = jiffies;
1409
1410         /* Creation time should not need to be updated on close */
1411         if (file_inf.LastWriteTime)
1412                 inode->i_mtime = cifs_NTtimeToUnix(file_inf.LastWriteTime);
1413         if (file_inf.ChangeTime)
1414                 inode_set_ctime_to_ts(inode,
1415                                       cifs_NTtimeToUnix(file_inf.ChangeTime));
1416         if (file_inf.LastAccessTime)
1417                 inode->i_atime = cifs_NTtimeToUnix(file_inf.LastAccessTime);
1418
1419         /*
1420          * i_blocks is not related to (i_size / i_blksize),
1421          * but instead 512 byte (2**9) size is required for
1422          * calculating num blocks.
1423          */
1424         if (le64_to_cpu(file_inf.AllocationSize) > 4096)
1425                 inode->i_blocks =
1426                         (512 - 1 + le64_to_cpu(file_inf.AllocationSize)) >> 9;
1427
1428         /* End of file and Attributes should not have to be updated on close */
1429         spin_unlock(&inode->i_lock);
1430 }
1431
1432 static int
1433 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
1434                      u64 persistent_fid, u64 volatile_fid,
1435                      struct copychunk_ioctl *pcchunk)
1436 {
1437         int rc;
1438         unsigned int ret_data_len;
1439         struct resume_key_req *res_key;
1440
1441         rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
1442                         FSCTL_SRV_REQUEST_RESUME_KEY, NULL, 0 /* no input */,
1443                         CIFSMaxBufSize, (char **)&res_key, &ret_data_len);
1444
1445         if (rc == -EOPNOTSUPP) {
1446                 pr_warn_once("Server share %s does not support copy range\n", tcon->tree_name);
1447                 goto req_res_key_exit;
1448         } else if (rc) {
1449                 cifs_tcon_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
1450                 goto req_res_key_exit;
1451         }
1452         if (ret_data_len < sizeof(struct resume_key_req)) {
1453                 cifs_tcon_dbg(VFS, "Invalid refcopy resume key length\n");
1454                 rc = -EINVAL;
1455                 goto req_res_key_exit;
1456         }
1457         memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
1458
1459 req_res_key_exit:
1460         kfree(res_key);
1461         return rc;
1462 }
1463
1464 static int
1465 smb2_ioctl_query_info(const unsigned int xid,
1466                       struct cifs_tcon *tcon,
1467                       struct cifs_sb_info *cifs_sb,
1468                       __le16 *path, int is_dir,
1469                       unsigned long p)
1470 {
1471         struct smb2_compound_vars *vars;
1472         struct smb_rqst *rqst;
1473         struct kvec *rsp_iov;
1474         struct cifs_ses *ses = tcon->ses;
1475         struct TCP_Server_Info *server = cifs_pick_channel(ses);
1476         char __user *arg = (char __user *)p;
1477         struct smb_query_info qi;
1478         struct smb_query_info __user *pqi;
1479         int rc = 0;
1480         int flags = CIFS_CP_CREATE_CLOSE_OP;
1481         struct smb2_query_info_rsp *qi_rsp = NULL;
1482         struct smb2_ioctl_rsp *io_rsp = NULL;
1483         void *buffer = NULL;
1484         int resp_buftype[3];
1485         struct cifs_open_parms oparms;
1486         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1487         struct cifs_fid fid;
1488         unsigned int size[2];
1489         void *data[2];
1490         int create_options = is_dir ? CREATE_NOT_FILE : CREATE_NOT_DIR;
1491         void (*free_req1_func)(struct smb_rqst *r);
1492
1493         vars = kzalloc(sizeof(*vars), GFP_ATOMIC);
1494         if (vars == NULL)
1495                 return -ENOMEM;
1496         rqst = &vars->rqst[0];
1497         rsp_iov = &vars->rsp_iov[0];
1498
1499         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1500
1501         if (copy_from_user(&qi, arg, sizeof(struct smb_query_info))) {
1502                 rc = -EFAULT;
1503                 goto free_vars;
1504         }
1505         if (qi.output_buffer_length > 1024) {
1506                 rc = -EINVAL;
1507                 goto free_vars;
1508         }
1509
1510         if (!ses || !server) {
1511                 rc = -EIO;
1512                 goto free_vars;
1513         }
1514
1515         if (smb3_encryption_required(tcon))
1516                 flags |= CIFS_TRANSFORM_REQ;
1517
1518         if (qi.output_buffer_length) {
1519                 buffer = memdup_user(arg + sizeof(struct smb_query_info), qi.output_buffer_length);
1520                 if (IS_ERR(buffer)) {
1521                         rc = PTR_ERR(buffer);
1522                         goto free_vars;
1523                 }
1524         }
1525
1526         /* Open */
1527         rqst[0].rq_iov = &vars->open_iov[0];
1528         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1529
1530         oparms = (struct cifs_open_parms) {
1531                 .tcon = tcon,
1532                 .disposition = FILE_OPEN,
1533                 .create_options = cifs_create_options(cifs_sb, create_options),
1534                 .fid = &fid,
1535         };
1536
1537         if (qi.flags & PASSTHRU_FSCTL) {
1538                 switch (qi.info_type & FSCTL_DEVICE_ACCESS_MASK) {
1539                 case FSCTL_DEVICE_ACCESS_FILE_READ_WRITE_ACCESS:
1540                         oparms.desired_access = FILE_READ_DATA | FILE_WRITE_DATA | FILE_READ_ATTRIBUTES | SYNCHRONIZE;
1541                         break;
1542                 case FSCTL_DEVICE_ACCESS_FILE_ANY_ACCESS:
1543                         oparms.desired_access = GENERIC_ALL;
1544                         break;
1545                 case FSCTL_DEVICE_ACCESS_FILE_READ_ACCESS:
1546                         oparms.desired_access = GENERIC_READ;
1547                         break;
1548                 case FSCTL_DEVICE_ACCESS_FILE_WRITE_ACCESS:
1549                         oparms.desired_access = GENERIC_WRITE;
1550                         break;
1551                 }
1552         } else if (qi.flags & PASSTHRU_SET_INFO) {
1553                 oparms.desired_access = GENERIC_WRITE;
1554         } else {
1555                 oparms.desired_access = FILE_READ_ATTRIBUTES | READ_CONTROL;
1556         }
1557
1558         rc = SMB2_open_init(tcon, server,
1559                             &rqst[0], &oplock, &oparms, path);
1560         if (rc)
1561                 goto free_output_buffer;
1562         smb2_set_next_command(tcon, &rqst[0]);
1563
1564         /* Query */
1565         if (qi.flags & PASSTHRU_FSCTL) {
1566                 /* Can eventually relax perm check since server enforces too */
1567                 if (!capable(CAP_SYS_ADMIN)) {
1568                         rc = -EPERM;
1569                         goto free_open_req;
1570                 }
1571                 rqst[1].rq_iov = &vars->io_iov[0];
1572                 rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
1573
1574                 rc = SMB2_ioctl_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID,
1575                                      qi.info_type, buffer, qi.output_buffer_length,
1576                                      CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE -
1577                                      MAX_SMB2_CLOSE_RESPONSE_SIZE);
1578                 free_req1_func = SMB2_ioctl_free;
1579         } else if (qi.flags == PASSTHRU_SET_INFO) {
1580                 /* Can eventually relax perm check since server enforces too */
1581                 if (!capable(CAP_SYS_ADMIN)) {
1582                         rc = -EPERM;
1583                         goto free_open_req;
1584                 }
1585                 if (qi.output_buffer_length < 8) {
1586                         rc = -EINVAL;
1587                         goto free_open_req;
1588                 }
1589                 rqst[1].rq_iov = vars->si_iov;
1590                 rqst[1].rq_nvec = 1;
1591
1592                 /* MS-FSCC 2.4.13 FileEndOfFileInformation */
1593                 size[0] = 8;
1594                 data[0] = buffer;
1595
1596                 rc = SMB2_set_info_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID,
1597                                         current->tgid, FILE_END_OF_FILE_INFORMATION,
1598                                         SMB2_O_INFO_FILE, 0, data, size);
1599                 free_req1_func = SMB2_set_info_free;
1600         } else if (qi.flags == PASSTHRU_QUERY_INFO) {
1601                 rqst[1].rq_iov = &vars->qi_iov;
1602                 rqst[1].rq_nvec = 1;
1603
1604                 rc = SMB2_query_info_init(tcon, server,
1605                                   &rqst[1], COMPOUND_FID,
1606                                   COMPOUND_FID, qi.file_info_class,
1607                                   qi.info_type, qi.additional_information,
1608                                   qi.input_buffer_length,
1609                                   qi.output_buffer_length, buffer);
1610                 free_req1_func = SMB2_query_info_free;
1611         } else { /* unknown flags */
1612                 cifs_tcon_dbg(VFS, "Invalid passthru query flags: 0x%x\n",
1613                               qi.flags);
1614                 rc = -EINVAL;
1615         }
1616
1617         if (rc)
1618                 goto free_open_req;
1619         smb2_set_next_command(tcon, &rqst[1]);
1620         smb2_set_related(&rqst[1]);
1621
1622         /* Close */
1623         rqst[2].rq_iov = &vars->close_iov;
1624         rqst[2].rq_nvec = 1;
1625
1626         rc = SMB2_close_init(tcon, server,
1627                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
1628         if (rc)
1629                 goto free_req_1;
1630         smb2_set_related(&rqst[2]);
1631
1632         rc = compound_send_recv(xid, ses, server,
1633                                 flags, 3, rqst,
1634                                 resp_buftype, rsp_iov);
1635         if (rc)
1636                 goto out;
1637
1638         /* No need to bump num_remote_opens since handle immediately closed */
1639         if (qi.flags & PASSTHRU_FSCTL) {
1640                 pqi = (struct smb_query_info __user *)arg;
1641                 io_rsp = (struct smb2_ioctl_rsp *)rsp_iov[1].iov_base;
1642                 if (le32_to_cpu(io_rsp->OutputCount) < qi.input_buffer_length)
1643                         qi.input_buffer_length = le32_to_cpu(io_rsp->OutputCount);
1644                 if (qi.input_buffer_length > 0 &&
1645                     le32_to_cpu(io_rsp->OutputOffset) + qi.input_buffer_length
1646                     > rsp_iov[1].iov_len) {
1647                         rc = -EFAULT;
1648                         goto out;
1649                 }
1650
1651                 if (copy_to_user(&pqi->input_buffer_length,
1652                                  &qi.input_buffer_length,
1653                                  sizeof(qi.input_buffer_length))) {
1654                         rc = -EFAULT;
1655                         goto out;
1656                 }
1657
1658                 if (copy_to_user((void __user *)pqi + sizeof(struct smb_query_info),
1659                                  (const void *)io_rsp + le32_to_cpu(io_rsp->OutputOffset),
1660                                  qi.input_buffer_length))
1661                         rc = -EFAULT;
1662         } else {
1663                 pqi = (struct smb_query_info __user *)arg;
1664                 qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1665                 if (le32_to_cpu(qi_rsp->OutputBufferLength) < qi.input_buffer_length)
1666                         qi.input_buffer_length = le32_to_cpu(qi_rsp->OutputBufferLength);
1667                 if (copy_to_user(&pqi->input_buffer_length,
1668                                  &qi.input_buffer_length,
1669                                  sizeof(qi.input_buffer_length))) {
1670                         rc = -EFAULT;
1671                         goto out;
1672                 }
1673
1674                 if (copy_to_user(pqi + 1, qi_rsp->Buffer,
1675                                  qi.input_buffer_length))
1676                         rc = -EFAULT;
1677         }
1678
1679 out:
1680         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1681         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1682         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1683         SMB2_close_free(&rqst[2]);
1684 free_req_1:
1685         free_req1_func(&rqst[1]);
1686 free_open_req:
1687         SMB2_open_free(&rqst[0]);
1688 free_output_buffer:
1689         kfree(buffer);
1690 free_vars:
1691         kfree(vars);
1692         return rc;
1693 }
1694
1695 static ssize_t
1696 smb2_copychunk_range(const unsigned int xid,
1697                         struct cifsFileInfo *srcfile,
1698                         struct cifsFileInfo *trgtfile, u64 src_off,
1699                         u64 len, u64 dest_off)
1700 {
1701         int rc;
1702         unsigned int ret_data_len;
1703         struct copychunk_ioctl *pcchunk;
1704         struct copychunk_ioctl_rsp *retbuf = NULL;
1705         struct cifs_tcon *tcon;
1706         int chunks_copied = 0;
1707         bool chunk_sizes_updated = false;
1708         ssize_t bytes_written, total_bytes_written = 0;
1709
1710         pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
1711         if (pcchunk == NULL)
1712                 return -ENOMEM;
1713
1714         cifs_dbg(FYI, "%s: about to call request res key\n", __func__);
1715         /* Request a key from the server to identify the source of the copy */
1716         rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
1717                                 srcfile->fid.persistent_fid,
1718                                 srcfile->fid.volatile_fid, pcchunk);
1719
1720         /* Note: request_res_key sets res_key null only if rc !=0 */
1721         if (rc)
1722                 goto cchunk_out;
1723
1724         /* For now array only one chunk long, will make more flexible later */
1725         pcchunk->ChunkCount = cpu_to_le32(1);
1726         pcchunk->Reserved = 0;
1727         pcchunk->Reserved2 = 0;
1728
1729         tcon = tlink_tcon(trgtfile->tlink);
1730
1731         while (len > 0) {
1732                 pcchunk->SourceOffset = cpu_to_le64(src_off);
1733                 pcchunk->TargetOffset = cpu_to_le64(dest_off);
1734                 pcchunk->Length =
1735                         cpu_to_le32(min_t(u64, len, tcon->max_bytes_chunk));
1736
1737                 /* Request server copy to target from src identified by key */
1738                 kfree(retbuf);
1739                 retbuf = NULL;
1740                 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1741                         trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
1742                         (char *)pcchunk, sizeof(struct copychunk_ioctl),
1743                         CIFSMaxBufSize, (char **)&retbuf, &ret_data_len);
1744                 if (rc == 0) {
1745                         if (ret_data_len !=
1746                                         sizeof(struct copychunk_ioctl_rsp)) {
1747                                 cifs_tcon_dbg(VFS, "Invalid cchunk response size\n");
1748                                 rc = -EIO;
1749                                 goto cchunk_out;
1750                         }
1751                         if (retbuf->TotalBytesWritten == 0) {
1752                                 cifs_dbg(FYI, "no bytes copied\n");
1753                                 rc = -EIO;
1754                                 goto cchunk_out;
1755                         }
1756                         /*
1757                          * Check if server claimed to write more than we asked
1758                          */
1759                         if (le32_to_cpu(retbuf->TotalBytesWritten) >
1760                             le32_to_cpu(pcchunk->Length)) {
1761                                 cifs_tcon_dbg(VFS, "Invalid copy chunk response\n");
1762                                 rc = -EIO;
1763                                 goto cchunk_out;
1764                         }
1765                         if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
1766                                 cifs_tcon_dbg(VFS, "Invalid num chunks written\n");
1767                                 rc = -EIO;
1768                                 goto cchunk_out;
1769                         }
1770                         chunks_copied++;
1771
1772                         bytes_written = le32_to_cpu(retbuf->TotalBytesWritten);
1773                         src_off += bytes_written;
1774                         dest_off += bytes_written;
1775                         len -= bytes_written;
1776                         total_bytes_written += bytes_written;
1777
1778                         cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n",
1779                                 le32_to_cpu(retbuf->ChunksWritten),
1780                                 le32_to_cpu(retbuf->ChunkBytesWritten),
1781                                 bytes_written);
1782                 } else if (rc == -EINVAL) {
1783                         if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
1784                                 goto cchunk_out;
1785
1786                         cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
1787                                 le32_to_cpu(retbuf->ChunksWritten),
1788                                 le32_to_cpu(retbuf->ChunkBytesWritten),
1789                                 le32_to_cpu(retbuf->TotalBytesWritten));
1790
1791                         /*
1792                          * Check if this is the first request using these sizes,
1793                          * (ie check if copy succeed once with original sizes
1794                          * and check if the server gave us different sizes after
1795                          * we already updated max sizes on previous request).
1796                          * if not then why is the server returning an error now
1797                          */
1798                         if ((chunks_copied != 0) || chunk_sizes_updated)
1799                                 goto cchunk_out;
1800
1801                         /* Check that server is not asking us to grow size */
1802                         if (le32_to_cpu(retbuf->ChunkBytesWritten) <
1803                                         tcon->max_bytes_chunk)
1804                                 tcon->max_bytes_chunk =
1805                                         le32_to_cpu(retbuf->ChunkBytesWritten);
1806                         else
1807                                 goto cchunk_out; /* server gave us bogus size */
1808
1809                         /* No need to change MaxChunks since already set to 1 */
1810                         chunk_sizes_updated = true;
1811                 } else
1812                         goto cchunk_out;
1813         }
1814
1815 cchunk_out:
1816         kfree(pcchunk);
1817         kfree(retbuf);
1818         if (rc)
1819                 return rc;
1820         else
1821                 return total_bytes_written;
1822 }
1823
1824 static int
1825 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
1826                 struct cifs_fid *fid)
1827 {
1828         return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1829 }
1830
1831 static unsigned int
1832 smb2_read_data_offset(char *buf)
1833 {
1834         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1835
1836         return rsp->DataOffset;
1837 }
1838
1839 static unsigned int
1840 smb2_read_data_length(char *buf, bool in_remaining)
1841 {
1842         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1843
1844         if (in_remaining)
1845                 return le32_to_cpu(rsp->DataRemaining);
1846
1847         return le32_to_cpu(rsp->DataLength);
1848 }
1849
1850
1851 static int
1852 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
1853                struct cifs_io_parms *parms, unsigned int *bytes_read,
1854                char **buf, int *buf_type)
1855 {
1856         parms->persistent_fid = pfid->persistent_fid;
1857         parms->volatile_fid = pfid->volatile_fid;
1858         return SMB2_read(xid, parms, bytes_read, buf, buf_type);
1859 }
1860
1861 static int
1862 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
1863                 struct cifs_io_parms *parms, unsigned int *written,
1864                 struct kvec *iov, unsigned long nr_segs)
1865 {
1866
1867         parms->persistent_fid = pfid->persistent_fid;
1868         parms->volatile_fid = pfid->volatile_fid;
1869         return SMB2_write(xid, parms, written, iov, nr_segs);
1870 }
1871
1872 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
1873 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
1874                 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
1875 {
1876         struct cifsInodeInfo *cifsi;
1877         int rc;
1878
1879         cifsi = CIFS_I(inode);
1880
1881         /* if file already sparse don't bother setting sparse again */
1882         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
1883                 return true; /* already sparse */
1884
1885         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
1886                 return true; /* already not sparse */
1887
1888         /*
1889          * Can't check for sparse support on share the usual way via the
1890          * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
1891          * since Samba server doesn't set the flag on the share, yet
1892          * supports the set sparse FSCTL and returns sparse correctly
1893          * in the file attributes. If we fail setting sparse though we
1894          * mark that server does not support sparse files for this share
1895          * to avoid repeatedly sending the unsupported fsctl to server
1896          * if the file is repeatedly extended.
1897          */
1898         if (tcon->broken_sparse_sup)
1899                 return false;
1900
1901         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1902                         cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
1903                         &setsparse, 1, CIFSMaxBufSize, NULL, NULL);
1904         if (rc) {
1905                 tcon->broken_sparse_sup = true;
1906                 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
1907                 return false;
1908         }
1909
1910         if (setsparse)
1911                 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
1912         else
1913                 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
1914
1915         return true;
1916 }
1917
1918 static int
1919 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
1920                    struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
1921 {
1922         __le64 eof = cpu_to_le64(size);
1923         struct inode *inode;
1924
1925         /*
1926          * If extending file more than one page make sparse. Many Linux fs
1927          * make files sparse by default when extending via ftruncate
1928          */
1929         inode = d_inode(cfile->dentry);
1930
1931         if (!set_alloc && (size > inode->i_size + 8192)) {
1932                 __u8 set_sparse = 1;
1933
1934                 /* whether set sparse succeeds or not, extend the file */
1935                 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
1936         }
1937
1938         return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
1939                             cfile->fid.volatile_fid, cfile->pid, &eof);
1940 }
1941
1942 static int
1943 smb2_duplicate_extents(const unsigned int xid,
1944                         struct cifsFileInfo *srcfile,
1945                         struct cifsFileInfo *trgtfile, u64 src_off,
1946                         u64 len, u64 dest_off)
1947 {
1948         int rc;
1949         unsigned int ret_data_len;
1950         struct inode *inode;
1951         struct duplicate_extents_to_file dup_ext_buf;
1952         struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
1953
1954         /* server fileays advertise duplicate extent support with this flag */
1955         if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
1956              FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
1957                 return -EOPNOTSUPP;
1958
1959         dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
1960         dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
1961         dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
1962         dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
1963         dup_ext_buf.ByteCount = cpu_to_le64(len);
1964         cifs_dbg(FYI, "Duplicate extents: src off %lld dst off %lld len %lld\n",
1965                 src_off, dest_off, len);
1966
1967         inode = d_inode(trgtfile->dentry);
1968         if (inode->i_size < dest_off + len) {
1969                 rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
1970                 if (rc)
1971                         goto duplicate_extents_out;
1972
1973                 /*
1974                  * Although also could set plausible allocation size (i_blocks)
1975                  * here in addition to setting the file size, in reflink
1976                  * it is likely that the target file is sparse. Its allocation
1977                  * size will be queried on next revalidate, but it is important
1978                  * to make sure that file's cached size is updated immediately
1979                  */
1980                 cifs_setsize(inode, dest_off + len);
1981         }
1982         rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1983                         trgtfile->fid.volatile_fid,
1984                         FSCTL_DUPLICATE_EXTENTS_TO_FILE,
1985                         (char *)&dup_ext_buf,
1986                         sizeof(struct duplicate_extents_to_file),
1987                         CIFSMaxBufSize, NULL,
1988                         &ret_data_len);
1989
1990         if (ret_data_len > 0)
1991                 cifs_dbg(FYI, "Non-zero response length in duplicate extents\n");
1992
1993 duplicate_extents_out:
1994         return rc;
1995 }
1996
1997 static int
1998 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
1999                    struct cifsFileInfo *cfile)
2000 {
2001         return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
2002                             cfile->fid.volatile_fid);
2003 }
2004
2005 static int
2006 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
2007                    struct cifsFileInfo *cfile)
2008 {
2009         struct fsctl_set_integrity_information_req integr_info;
2010         unsigned int ret_data_len;
2011
2012         integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
2013         integr_info.Flags = 0;
2014         integr_info.Reserved = 0;
2015
2016         return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2017                         cfile->fid.volatile_fid,
2018                         FSCTL_SET_INTEGRITY_INFORMATION,
2019                         (char *)&integr_info,
2020                         sizeof(struct fsctl_set_integrity_information_req),
2021                         CIFSMaxBufSize, NULL,
2022                         &ret_data_len);
2023
2024 }
2025
2026 /* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */
2027 #define GMT_TOKEN_SIZE 50
2028
2029 #define MIN_SNAPSHOT_ARRAY_SIZE 16 /* See MS-SMB2 section 3.3.5.15.1 */
2030
2031 /*
2032  * Input buffer contains (empty) struct smb_snapshot array with size filled in
2033  * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2
2034  */
2035 static int
2036 smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
2037                    struct cifsFileInfo *cfile, void __user *ioc_buf)
2038 {
2039         char *retbuf = NULL;
2040         unsigned int ret_data_len = 0;
2041         int rc;
2042         u32 max_response_size;
2043         struct smb_snapshot_array snapshot_in;
2044
2045         /*
2046          * On the first query to enumerate the list of snapshots available
2047          * for this volume the buffer begins with 0 (number of snapshots
2048          * which can be returned is zero since at that point we do not know
2049          * how big the buffer needs to be). On the second query,
2050          * it (ret_data_len) is set to number of snapshots so we can
2051          * know to set the maximum response size larger (see below).
2052          */
2053         if (get_user(ret_data_len, (unsigned int __user *)ioc_buf))
2054                 return -EFAULT;
2055
2056         /*
2057          * Note that for snapshot queries that servers like Azure expect that
2058          * the first query be minimal size (and just used to get the number/size
2059          * of previous versions) so response size must be specified as EXACTLY
2060          * sizeof(struct snapshot_array) which is 16 when rounded up to multiple
2061          * of eight bytes.
2062          */
2063         if (ret_data_len == 0)
2064                 max_response_size = MIN_SNAPSHOT_ARRAY_SIZE;
2065         else
2066                 max_response_size = CIFSMaxBufSize;
2067
2068         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2069                         cfile->fid.volatile_fid,
2070                         FSCTL_SRV_ENUMERATE_SNAPSHOTS,
2071                         NULL, 0 /* no input data */, max_response_size,
2072                         (char **)&retbuf,
2073                         &ret_data_len);
2074         cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n",
2075                         rc, ret_data_len);
2076         if (rc)
2077                 return rc;
2078
2079         if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) {
2080                 /* Fixup buffer */
2081                 if (copy_from_user(&snapshot_in, ioc_buf,
2082                     sizeof(struct smb_snapshot_array))) {
2083                         rc = -EFAULT;
2084                         kfree(retbuf);
2085                         return rc;
2086                 }
2087
2088                 /*
2089                  * Check for min size, ie not large enough to fit even one GMT
2090                  * token (snapshot).  On the first ioctl some users may pass in
2091                  * smaller size (or zero) to simply get the size of the array
2092                  * so the user space caller can allocate sufficient memory
2093                  * and retry the ioctl again with larger array size sufficient
2094                  * to hold all of the snapshot GMT tokens on the second try.
2095                  */
2096                 if (snapshot_in.snapshot_array_size < GMT_TOKEN_SIZE)
2097                         ret_data_len = sizeof(struct smb_snapshot_array);
2098
2099                 /*
2100                  * We return struct SRV_SNAPSHOT_ARRAY, followed by
2101                  * the snapshot array (of 50 byte GMT tokens) each
2102                  * representing an available previous version of the data
2103                  */
2104                 if (ret_data_len > (snapshot_in.snapshot_array_size +
2105                                         sizeof(struct smb_snapshot_array)))
2106                         ret_data_len = snapshot_in.snapshot_array_size +
2107                                         sizeof(struct smb_snapshot_array);
2108
2109                 if (copy_to_user(ioc_buf, retbuf, ret_data_len))
2110                         rc = -EFAULT;
2111         }
2112
2113         kfree(retbuf);
2114         return rc;
2115 }
2116
2117
2118
2119 static int
2120 smb3_notify(const unsigned int xid, struct file *pfile,
2121             void __user *ioc_buf, bool return_changes)
2122 {
2123         struct smb3_notify_info notify;
2124         struct smb3_notify_info __user *pnotify_buf;
2125         struct dentry *dentry = pfile->f_path.dentry;
2126         struct inode *inode = file_inode(pfile);
2127         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2128         struct cifs_open_parms oparms;
2129         struct cifs_fid fid;
2130         struct cifs_tcon *tcon;
2131         const unsigned char *path;
2132         char *returned_ioctl_info = NULL;
2133         void *page = alloc_dentry_path();
2134         __le16 *utf16_path = NULL;
2135         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2136         int rc = 0;
2137         __u32 ret_len = 0;
2138
2139         path = build_path_from_dentry(dentry, page);
2140         if (IS_ERR(path)) {
2141                 rc = PTR_ERR(path);
2142                 goto notify_exit;
2143         }
2144
2145         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2146         if (utf16_path == NULL) {
2147                 rc = -ENOMEM;
2148                 goto notify_exit;
2149         }
2150
2151         if (return_changes) {
2152                 if (copy_from_user(&notify, ioc_buf, sizeof(struct smb3_notify_info))) {
2153                         rc = -EFAULT;
2154                         goto notify_exit;
2155                 }
2156         } else {
2157                 if (copy_from_user(&notify, ioc_buf, sizeof(struct smb3_notify))) {
2158                         rc = -EFAULT;
2159                         goto notify_exit;
2160                 }
2161                 notify.data_len = 0;
2162         }
2163
2164         tcon = cifs_sb_master_tcon(cifs_sb);
2165         oparms = (struct cifs_open_parms) {
2166                 .tcon = tcon,
2167                 .path = path,
2168                 .desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA,
2169                 .disposition = FILE_OPEN,
2170                 .create_options = cifs_create_options(cifs_sb, 0),
2171                 .fid = &fid,
2172         };
2173
2174         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
2175                        NULL);
2176         if (rc)
2177                 goto notify_exit;
2178
2179         rc = SMB2_change_notify(xid, tcon, fid.persistent_fid, fid.volatile_fid,
2180                                 notify.watch_tree, notify.completion_filter,
2181                                 notify.data_len, &returned_ioctl_info, &ret_len);
2182
2183         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2184
2185         cifs_dbg(FYI, "change notify for path %s rc %d\n", path, rc);
2186         if (return_changes && (ret_len > 0) && (notify.data_len > 0)) {
2187                 if (ret_len > notify.data_len)
2188                         ret_len = notify.data_len;
2189                 pnotify_buf = (struct smb3_notify_info __user *)ioc_buf;
2190                 if (copy_to_user(pnotify_buf->notify_data, returned_ioctl_info, ret_len))
2191                         rc = -EFAULT;
2192                 else if (copy_to_user(&pnotify_buf->data_len, &ret_len, sizeof(ret_len)))
2193                         rc = -EFAULT;
2194         }
2195         kfree(returned_ioctl_info);
2196 notify_exit:
2197         free_dentry_path(page);
2198         kfree(utf16_path);
2199         return rc;
2200 }
2201
2202 static int
2203 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
2204                      const char *path, struct cifs_sb_info *cifs_sb,
2205                      struct cifs_fid *fid, __u16 search_flags,
2206                      struct cifs_search_info *srch_inf)
2207 {
2208         __le16 *utf16_path;
2209         struct smb_rqst rqst[2];
2210         struct kvec rsp_iov[2];
2211         int resp_buftype[2];
2212         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2213         struct kvec qd_iov[SMB2_QUERY_DIRECTORY_IOV_SIZE];
2214         int rc, flags = 0;
2215         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2216         struct cifs_open_parms oparms;
2217         struct smb2_query_directory_rsp *qd_rsp = NULL;
2218         struct smb2_create_rsp *op_rsp = NULL;
2219         struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
2220         int retry_count = 0;
2221
2222         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2223         if (!utf16_path)
2224                 return -ENOMEM;
2225
2226         if (smb3_encryption_required(tcon))
2227                 flags |= CIFS_TRANSFORM_REQ;
2228
2229         memset(rqst, 0, sizeof(rqst));
2230         resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER;
2231         memset(rsp_iov, 0, sizeof(rsp_iov));
2232
2233         /* Open */
2234         memset(&open_iov, 0, sizeof(open_iov));
2235         rqst[0].rq_iov = open_iov;
2236         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2237
2238         oparms = (struct cifs_open_parms) {
2239                 .tcon = tcon,
2240                 .path = path,
2241                 .desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA,
2242                 .disposition = FILE_OPEN,
2243                 .create_options = cifs_create_options(cifs_sb, 0),
2244                 .fid = fid,
2245         };
2246
2247         rc = SMB2_open_init(tcon, server,
2248                             &rqst[0], &oplock, &oparms, utf16_path);
2249         if (rc)
2250                 goto qdf_free;
2251         smb2_set_next_command(tcon, &rqst[0]);
2252
2253         /* Query directory */
2254         srch_inf->entries_in_buffer = 0;
2255         srch_inf->index_of_last_entry = 2;
2256
2257         memset(&qd_iov, 0, sizeof(qd_iov));
2258         rqst[1].rq_iov = qd_iov;
2259         rqst[1].rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE;
2260
2261         rc = SMB2_query_directory_init(xid, tcon, server,
2262                                        &rqst[1],
2263                                        COMPOUND_FID, COMPOUND_FID,
2264                                        0, srch_inf->info_level);
2265         if (rc)
2266                 goto qdf_free;
2267
2268         smb2_set_related(&rqst[1]);
2269
2270 again:
2271         rc = compound_send_recv(xid, tcon->ses, server,
2272                                 flags, 2, rqst,
2273                                 resp_buftype, rsp_iov);
2274
2275         if (rc == -EAGAIN && retry_count++ < 10)
2276                 goto again;
2277
2278         /* If the open failed there is nothing to do */
2279         op_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base;
2280         if (op_rsp == NULL || op_rsp->hdr.Status != STATUS_SUCCESS) {
2281                 cifs_dbg(FYI, "query_dir_first: open failed rc=%d\n", rc);
2282                 goto qdf_free;
2283         }
2284         fid->persistent_fid = op_rsp->PersistentFileId;
2285         fid->volatile_fid = op_rsp->VolatileFileId;
2286
2287         /* Anything else than ENODATA means a genuine error */
2288         if (rc && rc != -ENODATA) {
2289                 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2290                 cifs_dbg(FYI, "query_dir_first: query directory failed rc=%d\n", rc);
2291                 trace_smb3_query_dir_err(xid, fid->persistent_fid,
2292                                          tcon->tid, tcon->ses->Suid, 0, 0, rc);
2293                 goto qdf_free;
2294         }
2295
2296         atomic_inc(&tcon->num_remote_opens);
2297
2298         qd_rsp = (struct smb2_query_directory_rsp *)rsp_iov[1].iov_base;
2299         if (qd_rsp->hdr.Status == STATUS_NO_MORE_FILES) {
2300                 trace_smb3_query_dir_done(xid, fid->persistent_fid,
2301                                           tcon->tid, tcon->ses->Suid, 0, 0);
2302                 srch_inf->endOfSearch = true;
2303                 rc = 0;
2304                 goto qdf_free;
2305         }
2306
2307         rc = smb2_parse_query_directory(tcon, &rsp_iov[1], resp_buftype[1],
2308                                         srch_inf);
2309         if (rc) {
2310                 trace_smb3_query_dir_err(xid, fid->persistent_fid, tcon->tid,
2311                         tcon->ses->Suid, 0, 0, rc);
2312                 goto qdf_free;
2313         }
2314         resp_buftype[1] = CIFS_NO_BUFFER;
2315
2316         trace_smb3_query_dir_done(xid, fid->persistent_fid, tcon->tid,
2317                         tcon->ses->Suid, 0, srch_inf->entries_in_buffer);
2318
2319  qdf_free:
2320         kfree(utf16_path);
2321         SMB2_open_free(&rqst[0]);
2322         SMB2_query_directory_free(&rqst[1]);
2323         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2324         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2325         return rc;
2326 }
2327
2328 static int
2329 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
2330                     struct cifs_fid *fid, __u16 search_flags,
2331                     struct cifs_search_info *srch_inf)
2332 {
2333         return SMB2_query_directory(xid, tcon, fid->persistent_fid,
2334                                     fid->volatile_fid, 0, srch_inf);
2335 }
2336
2337 static int
2338 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
2339                struct cifs_fid *fid)
2340 {
2341         return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2342 }
2343
2344 /*
2345  * If we negotiate SMB2 protocol and get STATUS_PENDING - update
2346  * the number of credits and return true. Otherwise - return false.
2347  */
2348 static bool
2349 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server)
2350 {
2351         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2352         int scredits, in_flight;
2353
2354         if (shdr->Status != STATUS_PENDING)
2355                 return false;
2356
2357         if (shdr->CreditRequest) {
2358                 spin_lock(&server->req_lock);
2359                 server->credits += le16_to_cpu(shdr->CreditRequest);
2360                 scredits = server->credits;
2361                 in_flight = server->in_flight;
2362                 spin_unlock(&server->req_lock);
2363                 wake_up(&server->request_q);
2364
2365                 trace_smb3_pend_credits(server->CurrentMid,
2366                                 server->conn_id, server->hostname, scredits,
2367                                 le16_to_cpu(shdr->CreditRequest), in_flight);
2368                 cifs_dbg(FYI, "%s: status pending add %u credits total=%d\n",
2369                                 __func__, le16_to_cpu(shdr->CreditRequest), scredits);
2370         }
2371
2372         return true;
2373 }
2374
2375 static bool
2376 smb2_is_session_expired(char *buf)
2377 {
2378         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2379
2380         if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED &&
2381             shdr->Status != STATUS_USER_SESSION_DELETED)
2382                 return false;
2383
2384         trace_smb3_ses_expired(le32_to_cpu(shdr->Id.SyncId.TreeId),
2385                                le64_to_cpu(shdr->SessionId),
2386                                le16_to_cpu(shdr->Command),
2387                                le64_to_cpu(shdr->MessageId));
2388         cifs_dbg(FYI, "Session expired or deleted\n");
2389
2390         return true;
2391 }
2392
2393 static bool
2394 smb2_is_status_io_timeout(char *buf)
2395 {
2396         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2397
2398         if (shdr->Status == STATUS_IO_TIMEOUT)
2399                 return true;
2400         else
2401                 return false;
2402 }
2403
2404 static bool
2405 smb2_is_network_name_deleted(char *buf, struct TCP_Server_Info *server)
2406 {
2407         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2408         struct TCP_Server_Info *pserver;
2409         struct cifs_ses *ses;
2410         struct cifs_tcon *tcon;
2411
2412         if (shdr->Status != STATUS_NETWORK_NAME_DELETED)
2413                 return false;
2414
2415         /* If server is a channel, select the primary channel */
2416         pserver = SERVER_IS_CHAN(server) ? server->primary_server : server;
2417
2418         spin_lock(&cifs_tcp_ses_lock);
2419         list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) {
2420                 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
2421                         if (tcon->tid == le32_to_cpu(shdr->Id.SyncId.TreeId)) {
2422                                 spin_lock(&tcon->tc_lock);
2423                                 tcon->need_reconnect = true;
2424                                 spin_unlock(&tcon->tc_lock);
2425                                 spin_unlock(&cifs_tcp_ses_lock);
2426                                 pr_warn_once("Server share %s deleted.\n",
2427                                              tcon->tree_name);
2428                                 return true;
2429                         }
2430                 }
2431         }
2432         spin_unlock(&cifs_tcp_ses_lock);
2433
2434         return false;
2435 }
2436
2437 static int
2438 smb2_oplock_response(struct cifs_tcon *tcon, __u64 persistent_fid,
2439                 __u64 volatile_fid, __u16 net_fid, struct cifsInodeInfo *cinode)
2440 {
2441         if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
2442                 return SMB2_lease_break(0, tcon, cinode->lease_key,
2443                                         smb2_get_lease_state(cinode));
2444
2445         return SMB2_oplock_break(0, tcon, persistent_fid, volatile_fid,
2446                                  CIFS_CACHE_READ(cinode) ? 1 : 0);
2447 }
2448
2449 void
2450 smb2_set_related(struct smb_rqst *rqst)
2451 {
2452         struct smb2_hdr *shdr;
2453
2454         shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base);
2455         if (shdr == NULL) {
2456                 cifs_dbg(FYI, "shdr NULL in smb2_set_related\n");
2457                 return;
2458         }
2459         shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
2460 }
2461
2462 char smb2_padding[7] = {0, 0, 0, 0, 0, 0, 0};
2463
2464 void
2465 smb2_set_next_command(struct cifs_tcon *tcon, struct smb_rqst *rqst)
2466 {
2467         struct smb2_hdr *shdr;
2468         struct cifs_ses *ses = tcon->ses;
2469         struct TCP_Server_Info *server = ses->server;
2470         unsigned long len = smb_rqst_len(server, rqst);
2471         int i, num_padding;
2472
2473         shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base);
2474         if (shdr == NULL) {
2475                 cifs_dbg(FYI, "shdr NULL in smb2_set_next_command\n");
2476                 return;
2477         }
2478
2479         /* SMB headers in a compound are 8 byte aligned. */
2480
2481         /* No padding needed */
2482         if (!(len & 7))
2483                 goto finished;
2484
2485         num_padding = 8 - (len & 7);
2486         if (!smb3_encryption_required(tcon)) {
2487                 /*
2488                  * If we do not have encryption then we can just add an extra
2489                  * iov for the padding.
2490                  */
2491                 rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding;
2492                 rqst->rq_iov[rqst->rq_nvec].iov_len = num_padding;
2493                 rqst->rq_nvec++;
2494                 len += num_padding;
2495         } else {
2496                 /*
2497                  * We can not add a small padding iov for the encryption case
2498                  * because the encryption framework can not handle the padding
2499                  * iovs.
2500                  * We have to flatten this into a single buffer and add
2501                  * the padding to it.
2502                  */
2503                 for (i = 1; i < rqst->rq_nvec; i++) {
2504                         memcpy(rqst->rq_iov[0].iov_base +
2505                                rqst->rq_iov[0].iov_len,
2506                                rqst->rq_iov[i].iov_base,
2507                                rqst->rq_iov[i].iov_len);
2508                         rqst->rq_iov[0].iov_len += rqst->rq_iov[i].iov_len;
2509                 }
2510                 memset(rqst->rq_iov[0].iov_base + rqst->rq_iov[0].iov_len,
2511                        0, num_padding);
2512                 rqst->rq_iov[0].iov_len += num_padding;
2513                 len += num_padding;
2514                 rqst->rq_nvec = 1;
2515         }
2516
2517  finished:
2518         shdr->NextCommand = cpu_to_le32(len);
2519 }
2520
2521 /*
2522  * Passes the query info response back to the caller on success.
2523  * Caller need to free this with free_rsp_buf().
2524  */
2525 int
2526 smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon,
2527                          const char *path, u32 desired_access,
2528                          u32 class, u32 type, u32 output_len,
2529                          struct kvec *rsp, int *buftype,
2530                          struct cifs_sb_info *cifs_sb)
2531 {
2532         struct smb2_compound_vars *vars;
2533         struct cifs_ses *ses = tcon->ses;
2534         struct TCP_Server_Info *server = cifs_pick_channel(ses);
2535         int flags = CIFS_CP_CREATE_CLOSE_OP;
2536         struct smb_rqst *rqst;
2537         int resp_buftype[3];
2538         struct kvec *rsp_iov;
2539         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2540         struct cifs_open_parms oparms;
2541         struct cifs_fid fid;
2542         int rc;
2543         __le16 *utf16_path;
2544         struct cached_fid *cfid = NULL;
2545
2546         if (!path)
2547                 path = "";
2548         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2549         if (!utf16_path)
2550                 return -ENOMEM;
2551
2552         if (smb3_encryption_required(tcon))
2553                 flags |= CIFS_TRANSFORM_REQ;
2554
2555         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
2556         vars = kzalloc(sizeof(*vars), GFP_KERNEL);
2557         if (!vars) {
2558                 rc = -ENOMEM;
2559                 goto out_free_path;
2560         }
2561         rqst = vars->rqst;
2562         rsp_iov = vars->rsp_iov;
2563
2564         /*
2565          * We can only call this for things we know are directories.
2566          */
2567         if (!strcmp(path, ""))
2568                 open_cached_dir(xid, tcon, path, cifs_sb, false,
2569                                 &cfid); /* cfid null if open dir failed */
2570
2571         rqst[0].rq_iov = vars->open_iov;
2572         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2573
2574         oparms = (struct cifs_open_parms) {
2575                 .tcon = tcon,
2576                 .path = path,
2577                 .desired_access = desired_access,
2578                 .disposition = FILE_OPEN,
2579                 .create_options = cifs_create_options(cifs_sb, 0),
2580                 .fid = &fid,
2581         };
2582
2583         rc = SMB2_open_init(tcon, server,
2584                             &rqst[0], &oplock, &oparms, utf16_path);
2585         if (rc)
2586                 goto qic_exit;
2587         smb2_set_next_command(tcon, &rqst[0]);
2588
2589         rqst[1].rq_iov = &vars->qi_iov;
2590         rqst[1].rq_nvec = 1;
2591
2592         if (cfid) {
2593                 rc = SMB2_query_info_init(tcon, server,
2594                                           &rqst[1],
2595                                           cfid->fid.persistent_fid,
2596                                           cfid->fid.volatile_fid,
2597                                           class, type, 0,
2598                                           output_len, 0,
2599                                           NULL);
2600         } else {
2601                 rc = SMB2_query_info_init(tcon, server,
2602                                           &rqst[1],
2603                                           COMPOUND_FID,
2604                                           COMPOUND_FID,
2605                                           class, type, 0,
2606                                           output_len, 0,
2607                                           NULL);
2608         }
2609         if (rc)
2610                 goto qic_exit;
2611         if (!cfid) {
2612                 smb2_set_next_command(tcon, &rqst[1]);
2613                 smb2_set_related(&rqst[1]);
2614         }
2615
2616         rqst[2].rq_iov = &vars->close_iov;
2617         rqst[2].rq_nvec = 1;
2618
2619         rc = SMB2_close_init(tcon, server,
2620                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
2621         if (rc)
2622                 goto qic_exit;
2623         smb2_set_related(&rqst[2]);
2624
2625         if (cfid) {
2626                 rc = compound_send_recv(xid, ses, server,
2627                                         flags, 1, &rqst[1],
2628                                         &resp_buftype[1], &rsp_iov[1]);
2629         } else {
2630                 rc = compound_send_recv(xid, ses, server,
2631                                         flags, 3, rqst,
2632                                         resp_buftype, rsp_iov);
2633         }
2634         if (rc) {
2635                 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2636                 if (rc == -EREMCHG) {
2637                         tcon->need_reconnect = true;
2638                         pr_warn_once("server share %s deleted\n",
2639                                      tcon->tree_name);
2640                 }
2641                 goto qic_exit;
2642         }
2643         *rsp = rsp_iov[1];
2644         *buftype = resp_buftype[1];
2645
2646  qic_exit:
2647         SMB2_open_free(&rqst[0]);
2648         SMB2_query_info_free(&rqst[1]);
2649         SMB2_close_free(&rqst[2]);
2650         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2651         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
2652         if (cfid)
2653                 close_cached_dir(cfid);
2654         kfree(vars);
2655 out_free_path:
2656         kfree(utf16_path);
2657         return rc;
2658 }
2659
2660 static int
2661 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2662              struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
2663 {
2664         struct smb2_query_info_rsp *rsp;
2665         struct smb2_fs_full_size_info *info = NULL;
2666         struct kvec rsp_iov = {NULL, 0};
2667         int buftype = CIFS_NO_BUFFER;
2668         int rc;
2669
2670
2671         rc = smb2_query_info_compound(xid, tcon, "",
2672                                       FILE_READ_ATTRIBUTES,
2673                                       FS_FULL_SIZE_INFORMATION,
2674                                       SMB2_O_INFO_FILESYSTEM,
2675                                       sizeof(struct smb2_fs_full_size_info),
2676                                       &rsp_iov, &buftype, cifs_sb);
2677         if (rc)
2678                 goto qfs_exit;
2679
2680         rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
2681         buf->f_type = SMB2_SUPER_MAGIC;
2682         info = (struct smb2_fs_full_size_info *)(
2683                 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
2684         rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
2685                                le32_to_cpu(rsp->OutputBufferLength),
2686                                &rsp_iov,
2687                                sizeof(struct smb2_fs_full_size_info));
2688         if (!rc)
2689                 smb2_copy_fs_info_to_kstatfs(info, buf);
2690
2691 qfs_exit:
2692         trace_smb3_qfs_done(xid, tcon->tid, tcon->ses->Suid, tcon->tree_name, rc);
2693         free_rsp_buf(buftype, rsp_iov.iov_base);
2694         return rc;
2695 }
2696
2697 static int
2698 smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2699                struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
2700 {
2701         int rc;
2702         __le16 srch_path = 0; /* Null - open root of share */
2703         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2704         struct cifs_open_parms oparms;
2705         struct cifs_fid fid;
2706
2707         if (!tcon->posix_extensions)
2708                 return smb2_queryfs(xid, tcon, cifs_sb, buf);
2709
2710         oparms = (struct cifs_open_parms) {
2711                 .tcon = tcon,
2712                 .path = "",
2713                 .desired_access = FILE_READ_ATTRIBUTES,
2714                 .disposition = FILE_OPEN,
2715                 .create_options = cifs_create_options(cifs_sb, 0),
2716                 .fid = &fid,
2717         };
2718
2719         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
2720                        NULL, NULL);
2721         if (rc)
2722                 return rc;
2723
2724         rc = SMB311_posix_qfs_info(xid, tcon, fid.persistent_fid,
2725                                    fid.volatile_fid, buf);
2726         buf->f_type = SMB2_SUPER_MAGIC;
2727         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2728         return rc;
2729 }
2730
2731 static bool
2732 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
2733 {
2734         return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
2735                ob1->fid.volatile_fid == ob2->fid.volatile_fid;
2736 }
2737
2738 static int
2739 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
2740                __u64 length, __u32 type, int lock, int unlock, bool wait)
2741 {
2742         if (unlock && !lock)
2743                 type = SMB2_LOCKFLAG_UNLOCK;
2744         return SMB2_lock(xid, tlink_tcon(cfile->tlink),
2745                          cfile->fid.persistent_fid, cfile->fid.volatile_fid,
2746                          current->tgid, length, offset, type, wait);
2747 }
2748
2749 static void
2750 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
2751 {
2752         memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
2753 }
2754
2755 static void
2756 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
2757 {
2758         memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
2759 }
2760
2761 static void
2762 smb2_new_lease_key(struct cifs_fid *fid)
2763 {
2764         generate_random_uuid(fid->lease_key);
2765 }
2766
2767 static int
2768 smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
2769                    const char *search_name,
2770                    struct dfs_info3_param **target_nodes,
2771                    unsigned int *num_of_nodes,
2772                    const struct nls_table *nls_codepage, int remap)
2773 {
2774         int rc;
2775         __le16 *utf16_path = NULL;
2776         int utf16_path_len = 0;
2777         struct cifs_tcon *tcon;
2778         struct fsctl_get_dfs_referral_req *dfs_req = NULL;
2779         struct get_dfs_referral_rsp *dfs_rsp = NULL;
2780         u32 dfs_req_size = 0, dfs_rsp_size = 0;
2781         int retry_count = 0;
2782
2783         cifs_dbg(FYI, "%s: path: %s\n", __func__, search_name);
2784
2785         /*
2786          * Try to use the IPC tcon, otherwise just use any
2787          */
2788         tcon = ses->tcon_ipc;
2789         if (tcon == NULL) {
2790                 spin_lock(&cifs_tcp_ses_lock);
2791                 tcon = list_first_entry_or_null(&ses->tcon_list,
2792                                                 struct cifs_tcon,
2793                                                 tcon_list);
2794                 if (tcon)
2795                         tcon->tc_count++;
2796                 spin_unlock(&cifs_tcp_ses_lock);
2797         }
2798
2799         if (tcon == NULL) {
2800                 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n",
2801                          ses);
2802                 rc = -ENOTCONN;
2803                 goto out;
2804         }
2805
2806         utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX,
2807                                            &utf16_path_len,
2808                                            nls_codepage, remap);
2809         if (!utf16_path) {
2810                 rc = -ENOMEM;
2811                 goto out;
2812         }
2813
2814         dfs_req_size = sizeof(*dfs_req) + utf16_path_len;
2815         dfs_req = kzalloc(dfs_req_size, GFP_KERNEL);
2816         if (!dfs_req) {
2817                 rc = -ENOMEM;
2818                 goto out;
2819         }
2820
2821         /* Highest DFS referral version understood */
2822         dfs_req->MaxReferralLevel = DFS_VERSION;
2823
2824         /* Path to resolve in an UTF-16 null-terminated string */
2825         memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len);
2826
2827         do {
2828                 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
2829                                 FSCTL_DFS_GET_REFERRALS,
2830                                 (char *)dfs_req, dfs_req_size, CIFSMaxBufSize,
2831                                 (char **)&dfs_rsp, &dfs_rsp_size);
2832                 if (!is_retryable_error(rc))
2833                         break;
2834                 usleep_range(512, 2048);
2835         } while (++retry_count < 5);
2836
2837         if (!rc && !dfs_rsp)
2838                 rc = -EIO;
2839         if (rc) {
2840                 if (!is_retryable_error(rc) && rc != -ENOENT && rc != -EOPNOTSUPP)
2841                         cifs_tcon_dbg(VFS, "%s: ioctl error: rc=%d\n", __func__, rc);
2842                 goto out;
2843         }
2844
2845         rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size,
2846                                  num_of_nodes, target_nodes,
2847                                  nls_codepage, remap, search_name,
2848                                  true /* is_unicode */);
2849         if (rc) {
2850                 cifs_tcon_dbg(VFS, "parse error in %s rc=%d\n", __func__, rc);
2851                 goto out;
2852         }
2853
2854  out:
2855         if (tcon && !tcon->ipc) {
2856                 /* ipc tcons are not refcounted */
2857                 spin_lock(&cifs_tcp_ses_lock);
2858                 tcon->tc_count--;
2859                 /* tc_count can never go negative */
2860                 WARN_ON(tcon->tc_count < 0);
2861                 spin_unlock(&cifs_tcp_ses_lock);
2862         }
2863         kfree(utf16_path);
2864         kfree(dfs_req);
2865         kfree(dfs_rsp);
2866         return rc;
2867 }
2868
2869 /* See MS-FSCC 2.1.2.6 for the 'NFS' style reparse tags */
2870 static int parse_reparse_posix(struct reparse_posix_data *buf,
2871                                struct cifs_sb_info *cifs_sb,
2872                                struct cifs_open_info_data *data)
2873 {
2874         unsigned int len;
2875         u64 type;
2876
2877         switch ((type = le64_to_cpu(buf->InodeType))) {
2878         case NFS_SPECFILE_LNK:
2879                 len = le16_to_cpu(buf->ReparseDataLength);
2880                 data->symlink_target = cifs_strndup_from_utf16(buf->DataBuffer,
2881                                                                len, true,
2882                                                                cifs_sb->local_nls);
2883                 if (!data->symlink_target)
2884                         return -ENOMEM;
2885                 convert_delimiter(data->symlink_target, '/');
2886                 cifs_dbg(FYI, "%s: target path: %s\n",
2887                          __func__, data->symlink_target);
2888                 break;
2889         case NFS_SPECFILE_CHR:
2890         case NFS_SPECFILE_BLK:
2891         case NFS_SPECFILE_FIFO:
2892         case NFS_SPECFILE_SOCK:
2893                 break;
2894         default:
2895                 cifs_dbg(VFS, "%s: unhandled inode type: 0x%llx\n",
2896                          __func__, type);
2897                 return -EOPNOTSUPP;
2898         }
2899         return 0;
2900 }
2901
2902 static int parse_reparse_symlink(struct reparse_symlink_data_buffer *sym,
2903                                  u32 plen, bool unicode,
2904                                  struct cifs_sb_info *cifs_sb,
2905                                  struct cifs_open_info_data *data)
2906 {
2907         unsigned int len;
2908         unsigned int offs;
2909
2910         /* We handle Symbolic Link reparse tag here. See: MS-FSCC 2.1.2.4 */
2911
2912         offs = le16_to_cpu(sym->SubstituteNameOffset);
2913         len = le16_to_cpu(sym->SubstituteNameLength);
2914         if (offs + 20 > plen || offs + len + 20 > plen) {
2915                 cifs_dbg(VFS, "srv returned malformed symlink buffer\n");
2916                 return -EIO;
2917         }
2918
2919         data->symlink_target = cifs_strndup_from_utf16(sym->PathBuffer + offs,
2920                                                        len, unicode,
2921                                                        cifs_sb->local_nls);
2922         if (!data->symlink_target)
2923                 return -ENOMEM;
2924
2925         convert_delimiter(data->symlink_target, '/');
2926         cifs_dbg(FYI, "%s: target path: %s\n", __func__, data->symlink_target);
2927
2928         return 0;
2929 }
2930
2931 int parse_reparse_point(struct reparse_data_buffer *buf,
2932                         u32 plen, struct cifs_sb_info *cifs_sb,
2933                         bool unicode, struct cifs_open_info_data *data)
2934 {
2935         if (plen < sizeof(*buf)) {
2936                 cifs_dbg(VFS, "%s: reparse buffer is too small. Must be at least 8 bytes but was %d\n",
2937                          __func__, plen);
2938                 return -EIO;
2939         }
2940
2941         if (plen < le16_to_cpu(buf->ReparseDataLength) + sizeof(*buf)) {
2942                 cifs_dbg(VFS, "%s: invalid reparse buf length: %d\n",
2943                          __func__, plen);
2944                 return -EIO;
2945         }
2946
2947         data->reparse.buf = buf;
2948
2949         /* See MS-FSCC 2.1.2 */
2950         switch (le32_to_cpu(buf->ReparseTag)) {
2951         case IO_REPARSE_TAG_NFS:
2952                 return parse_reparse_posix((struct reparse_posix_data *)buf,
2953                                            cifs_sb, data);
2954         case IO_REPARSE_TAG_SYMLINK:
2955                 return parse_reparse_symlink(
2956                         (struct reparse_symlink_data_buffer *)buf,
2957                         plen, unicode, cifs_sb, data);
2958         case IO_REPARSE_TAG_LX_SYMLINK:
2959         case IO_REPARSE_TAG_AF_UNIX:
2960         case IO_REPARSE_TAG_LX_FIFO:
2961         case IO_REPARSE_TAG_LX_CHR:
2962         case IO_REPARSE_TAG_LX_BLK:
2963                 return 0;
2964         default:
2965                 cifs_dbg(VFS, "%s: unhandled reparse tag: 0x%08x\n",
2966                          __func__, le32_to_cpu(buf->ReparseTag));
2967                 return -EOPNOTSUPP;
2968         }
2969 }
2970
2971 static int smb2_parse_reparse_point(struct cifs_sb_info *cifs_sb,
2972                                     struct kvec *rsp_iov,
2973                                     struct cifs_open_info_data *data)
2974 {
2975         struct reparse_data_buffer *buf;
2976         struct smb2_ioctl_rsp *io = rsp_iov->iov_base;
2977         u32 plen = le32_to_cpu(io->OutputCount);
2978
2979         buf = (struct reparse_data_buffer *)((u8 *)io +
2980                                              le32_to_cpu(io->OutputOffset));
2981         return parse_reparse_point(buf, plen, cifs_sb, true, data);
2982 }
2983
2984 static int smb2_query_reparse_point(const unsigned int xid,
2985                                     struct cifs_tcon *tcon,
2986                                     struct cifs_sb_info *cifs_sb,
2987                                     const char *full_path,
2988                                     u32 *tag, struct kvec *rsp,
2989                                     int *rsp_buftype)
2990 {
2991         struct smb2_compound_vars *vars;
2992         int rc;
2993         __le16 *utf16_path = NULL;
2994         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2995         struct cifs_open_parms oparms;
2996         struct cifs_fid fid;
2997         struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
2998         int flags = CIFS_CP_CREATE_CLOSE_OP;
2999         struct smb_rqst *rqst;
3000         int resp_buftype[3];
3001         struct kvec *rsp_iov;
3002         struct smb2_ioctl_rsp *ioctl_rsp;
3003         struct reparse_data_buffer *reparse_buf;
3004         u32 plen;
3005
3006         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
3007
3008         if (smb3_encryption_required(tcon))
3009                 flags |= CIFS_TRANSFORM_REQ;
3010
3011         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
3012         if (!utf16_path)
3013                 return -ENOMEM;
3014
3015         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
3016         vars = kzalloc(sizeof(*vars), GFP_KERNEL);
3017         if (!vars) {
3018                 rc = -ENOMEM;
3019                 goto out_free_path;
3020         }
3021         rqst = vars->rqst;
3022         rsp_iov = vars->rsp_iov;
3023
3024         /*
3025          * setup smb2open - TODO add optimization to call cifs_get_readable_path
3026          * to see if there is a handle already open that we can use
3027          */
3028         rqst[0].rq_iov = vars->open_iov;
3029         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
3030
3031         oparms = (struct cifs_open_parms) {
3032                 .tcon = tcon,
3033                 .path = full_path,
3034                 .desired_access = FILE_READ_ATTRIBUTES,
3035                 .disposition = FILE_OPEN,
3036                 .create_options = cifs_create_options(cifs_sb, OPEN_REPARSE_POINT),
3037                 .fid = &fid,
3038         };
3039
3040         rc = SMB2_open_init(tcon, server,
3041                             &rqst[0], &oplock, &oparms, utf16_path);
3042         if (rc)
3043                 goto query_rp_exit;
3044         smb2_set_next_command(tcon, &rqst[0]);
3045
3046
3047         /* IOCTL */
3048         rqst[1].rq_iov = vars->io_iov;
3049         rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
3050
3051         rc = SMB2_ioctl_init(tcon, server,
3052                              &rqst[1], COMPOUND_FID,
3053                              COMPOUND_FID, FSCTL_GET_REPARSE_POINT, NULL, 0,
3054                              CIFSMaxBufSize -
3055                              MAX_SMB2_CREATE_RESPONSE_SIZE -
3056                              MAX_SMB2_CLOSE_RESPONSE_SIZE);
3057         if (rc)
3058                 goto query_rp_exit;
3059
3060         smb2_set_next_command(tcon, &rqst[1]);
3061         smb2_set_related(&rqst[1]);
3062
3063         /* Close */
3064         rqst[2].rq_iov = &vars->close_iov;
3065         rqst[2].rq_nvec = 1;
3066
3067         rc = SMB2_close_init(tcon, server,
3068                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
3069         if (rc)
3070                 goto query_rp_exit;
3071
3072         smb2_set_related(&rqst[2]);
3073
3074         rc = compound_send_recv(xid, tcon->ses, server,
3075                                 flags, 3, rqst,
3076                                 resp_buftype, rsp_iov);
3077
3078         ioctl_rsp = rsp_iov[1].iov_base;
3079
3080         /*
3081          * Open was successful and we got an ioctl response.
3082          */
3083         if (rc == 0) {
3084                 /* See MS-FSCC 2.3.23 */
3085
3086                 reparse_buf = (struct reparse_data_buffer *)
3087                         ((char *)ioctl_rsp +
3088                          le32_to_cpu(ioctl_rsp->OutputOffset));
3089                 plen = le32_to_cpu(ioctl_rsp->OutputCount);
3090
3091                 if (plen + le32_to_cpu(ioctl_rsp->OutputOffset) >
3092                     rsp_iov[1].iov_len) {
3093                         cifs_tcon_dbg(FYI, "srv returned invalid ioctl len: %d\n",
3094                                  plen);
3095                         rc = -EIO;
3096                         goto query_rp_exit;
3097                 }
3098                 *tag = le32_to_cpu(reparse_buf->ReparseTag);
3099                 *rsp = rsp_iov[1];
3100                 *rsp_buftype = resp_buftype[1];
3101                 resp_buftype[1] = CIFS_NO_BUFFER;
3102         }
3103
3104  query_rp_exit:
3105         SMB2_open_free(&rqst[0]);
3106         SMB2_ioctl_free(&rqst[1]);
3107         SMB2_close_free(&rqst[2]);
3108         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
3109         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
3110         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
3111         kfree(vars);
3112 out_free_path:
3113         kfree(utf16_path);
3114         return rc;
3115 }
3116
3117 static struct cifs_ntsd *
3118 get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb,
3119                     const struct cifs_fid *cifsfid, u32 *pacllen, u32 info)
3120 {
3121         struct cifs_ntsd *pntsd = NULL;
3122         unsigned int xid;
3123         int rc = -EOPNOTSUPP;
3124         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3125
3126         if (IS_ERR(tlink))
3127                 return ERR_CAST(tlink);
3128
3129         xid = get_xid();
3130         cifs_dbg(FYI, "trying to get acl\n");
3131
3132         rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid,
3133                             cifsfid->volatile_fid, (void **)&pntsd, pacllen,
3134                             info);
3135         free_xid(xid);
3136
3137         cifs_put_tlink(tlink);
3138
3139         cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
3140         if (rc)
3141                 return ERR_PTR(rc);
3142         return pntsd;
3143
3144 }
3145
3146 static struct cifs_ntsd *
3147 get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb,
3148                      const char *path, u32 *pacllen, u32 info)
3149 {
3150         struct cifs_ntsd *pntsd = NULL;
3151         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3152         unsigned int xid;
3153         int rc;
3154         struct cifs_tcon *tcon;
3155         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3156         struct cifs_fid fid;
3157         struct cifs_open_parms oparms;
3158         __le16 *utf16_path;
3159
3160         cifs_dbg(FYI, "get smb3 acl for path %s\n", path);
3161         if (IS_ERR(tlink))
3162                 return ERR_CAST(tlink);
3163
3164         tcon = tlink_tcon(tlink);
3165         xid = get_xid();
3166
3167         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
3168         if (!utf16_path) {
3169                 rc = -ENOMEM;
3170                 free_xid(xid);
3171                 return ERR_PTR(rc);
3172         }
3173
3174         oparms = (struct cifs_open_parms) {
3175                 .tcon = tcon,
3176                 .path = path,
3177                 .desired_access = READ_CONTROL,
3178                 .disposition = FILE_OPEN,
3179                 /*
3180                  * When querying an ACL, even if the file is a symlink
3181                  * we want to open the source not the target, and so
3182                  * the protocol requires that the client specify this
3183                  * flag when opening a reparse point
3184                  */
3185                 .create_options = cifs_create_options(cifs_sb, 0) |
3186                                   OPEN_REPARSE_POINT,
3187                 .fid = &fid,
3188         };
3189
3190         if (info & SACL_SECINFO)
3191                 oparms.desired_access |= SYSTEM_SECURITY;
3192
3193         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
3194                        NULL);
3195         kfree(utf16_path);
3196         if (!rc) {
3197                 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3198                                     fid.volatile_fid, (void **)&pntsd, pacllen,
3199                                     info);
3200                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3201         }
3202
3203         cifs_put_tlink(tlink);
3204         free_xid(xid);
3205
3206         cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
3207         if (rc)
3208                 return ERR_PTR(rc);
3209         return pntsd;
3210 }
3211
3212 static int
3213 set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
3214                 struct inode *inode, const char *path, int aclflag)
3215 {
3216         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3217         unsigned int xid;
3218         int rc, access_flags = 0;
3219         struct cifs_tcon *tcon;
3220         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
3221         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3222         struct cifs_fid fid;
3223         struct cifs_open_parms oparms;
3224         __le16 *utf16_path;
3225
3226         cifs_dbg(FYI, "set smb3 acl for path %s\n", path);
3227         if (IS_ERR(tlink))
3228                 return PTR_ERR(tlink);
3229
3230         tcon = tlink_tcon(tlink);
3231         xid = get_xid();
3232
3233         if (aclflag & CIFS_ACL_OWNER || aclflag & CIFS_ACL_GROUP)
3234                 access_flags |= WRITE_OWNER;
3235         if (aclflag & CIFS_ACL_SACL)
3236                 access_flags |= SYSTEM_SECURITY;
3237         if (aclflag & CIFS_ACL_DACL)
3238                 access_flags |= WRITE_DAC;
3239
3240         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
3241         if (!utf16_path) {
3242                 rc = -ENOMEM;
3243                 free_xid(xid);
3244                 return rc;
3245         }
3246
3247         oparms = (struct cifs_open_parms) {
3248                 .tcon = tcon,
3249                 .desired_access = access_flags,
3250                 .create_options = cifs_create_options(cifs_sb, 0),
3251                 .disposition = FILE_OPEN,
3252                 .path = path,
3253                 .fid = &fid,
3254         };
3255
3256         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL,
3257                        NULL, NULL);
3258         kfree(utf16_path);
3259         if (!rc) {
3260                 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3261                             fid.volatile_fid, pnntsd, acllen, aclflag);
3262                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3263         }
3264
3265         cifs_put_tlink(tlink);
3266         free_xid(xid);
3267         return rc;
3268 }
3269
3270 /* Retrieve an ACL from the server */
3271 static struct cifs_ntsd *
3272 get_smb2_acl(struct cifs_sb_info *cifs_sb,
3273              struct inode *inode, const char *path,
3274              u32 *pacllen, u32 info)
3275 {
3276         struct cifs_ntsd *pntsd = NULL;
3277         struct cifsFileInfo *open_file = NULL;
3278
3279         if (inode && !(info & SACL_SECINFO))
3280                 open_file = find_readable_file(CIFS_I(inode), true);
3281         if (!open_file || (info & SACL_SECINFO))
3282                 return get_smb2_acl_by_path(cifs_sb, path, pacllen, info);
3283
3284         pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen, info);
3285         cifsFileInfo_put(open_file);
3286         return pntsd;
3287 }
3288
3289 static long smb3_zero_data(struct file *file, struct cifs_tcon *tcon,
3290                              loff_t offset, loff_t len, unsigned int xid)
3291 {
3292         struct cifsFileInfo *cfile = file->private_data;
3293         struct file_zero_data_information fsctl_buf;
3294
3295         cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3296
3297         fsctl_buf.FileOffset = cpu_to_le64(offset);
3298         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3299
3300         return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3301                           cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
3302                           (char *)&fsctl_buf,
3303                           sizeof(struct file_zero_data_information),
3304                           0, NULL, NULL);
3305 }
3306
3307 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
3308                             loff_t offset, loff_t len, bool keep_size)
3309 {
3310         struct cifs_ses *ses = tcon->ses;
3311         struct inode *inode = file_inode(file);
3312         struct cifsInodeInfo *cifsi = CIFS_I(inode);
3313         struct cifsFileInfo *cfile = file->private_data;
3314         unsigned long long new_size;
3315         long rc;
3316         unsigned int xid;
3317         __le64 eof;
3318
3319         xid = get_xid();
3320
3321         trace_smb3_zero_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3322                               ses->Suid, offset, len);
3323
3324         inode_lock(inode);
3325         filemap_invalidate_lock(inode->i_mapping);
3326
3327         /*
3328          * We zero the range through ioctl, so we need remove the page caches
3329          * first, otherwise the data may be inconsistent with the server.
3330          */
3331         truncate_pagecache_range(inode, offset, offset + len - 1);
3332
3333         /* if file not oplocked can't be sure whether asking to extend size */
3334         rc = -EOPNOTSUPP;
3335         if (keep_size == false && !CIFS_CACHE_READ(cifsi))
3336                 goto zero_range_exit;
3337
3338         rc = smb3_zero_data(file, tcon, offset, len, xid);
3339         if (rc < 0)
3340                 goto zero_range_exit;
3341
3342         /*
3343          * do we also need to change the size of the file?
3344          */
3345         new_size = offset + len;
3346         if (keep_size == false && (unsigned long long)i_size_read(inode) < new_size) {
3347                 eof = cpu_to_le64(new_size);
3348                 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3349                                   cfile->fid.volatile_fid, cfile->pid, &eof);
3350                 if (rc >= 0) {
3351                         truncate_setsize(inode, new_size);
3352                         fscache_resize_cookie(cifs_inode_cookie(inode), new_size);
3353                 }
3354         }
3355
3356  zero_range_exit:
3357         filemap_invalidate_unlock(inode->i_mapping);
3358         inode_unlock(inode);
3359         free_xid(xid);
3360         if (rc)
3361                 trace_smb3_zero_err(xid, cfile->fid.persistent_fid, tcon->tid,
3362                               ses->Suid, offset, len, rc);
3363         else
3364                 trace_smb3_zero_done(xid, cfile->fid.persistent_fid, tcon->tid,
3365                               ses->Suid, offset, len);
3366         return rc;
3367 }
3368
3369 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
3370                             loff_t offset, loff_t len)
3371 {
3372         struct inode *inode = file_inode(file);
3373         struct cifsFileInfo *cfile = file->private_data;
3374         struct file_zero_data_information fsctl_buf;
3375         long rc;
3376         unsigned int xid;
3377         __u8 set_sparse = 1;
3378
3379         xid = get_xid();
3380
3381         inode_lock(inode);
3382         /* Need to make file sparse, if not already, before freeing range. */
3383         /* Consider adding equivalent for compressed since it could also work */
3384         if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) {
3385                 rc = -EOPNOTSUPP;
3386                 goto out;
3387         }
3388
3389         filemap_invalidate_lock(inode->i_mapping);
3390         /*
3391          * We implement the punch hole through ioctl, so we need remove the page
3392          * caches first, otherwise the data may be inconsistent with the server.
3393          */
3394         truncate_pagecache_range(inode, offset, offset + len - 1);
3395
3396         cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3397
3398         fsctl_buf.FileOffset = cpu_to_le64(offset);
3399         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3400
3401         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3402                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
3403                         (char *)&fsctl_buf,
3404                         sizeof(struct file_zero_data_information),
3405                         CIFSMaxBufSize, NULL, NULL);
3406         filemap_invalidate_unlock(inode->i_mapping);
3407 out:
3408         inode_unlock(inode);
3409         free_xid(xid);
3410         return rc;
3411 }
3412
3413 static int smb3_simple_fallocate_write_range(unsigned int xid,
3414                                              struct cifs_tcon *tcon,
3415                                              struct cifsFileInfo *cfile,
3416                                              loff_t off, loff_t len,
3417                                              char *buf)
3418 {
3419         struct cifs_io_parms io_parms = {0};
3420         int nbytes;
3421         int rc = 0;
3422         struct kvec iov[2];
3423
3424         io_parms.netfid = cfile->fid.netfid;
3425         io_parms.pid = current->tgid;
3426         io_parms.tcon = tcon;
3427         io_parms.persistent_fid = cfile->fid.persistent_fid;
3428         io_parms.volatile_fid = cfile->fid.volatile_fid;
3429
3430         while (len) {
3431                 io_parms.offset = off;
3432                 io_parms.length = len;
3433                 if (io_parms.length > SMB2_MAX_BUFFER_SIZE)
3434                         io_parms.length = SMB2_MAX_BUFFER_SIZE;
3435                 /* iov[0] is reserved for smb header */
3436                 iov[1].iov_base = buf;
3437                 iov[1].iov_len = io_parms.length;
3438                 rc = SMB2_write(xid, &io_parms, &nbytes, iov, 1);
3439                 if (rc)
3440                         break;
3441                 if (nbytes > len)
3442                         return -EINVAL;
3443                 buf += nbytes;
3444                 off += nbytes;
3445                 len -= nbytes;
3446         }
3447         return rc;
3448 }
3449
3450 static int smb3_simple_fallocate_range(unsigned int xid,
3451                                        struct cifs_tcon *tcon,
3452                                        struct cifsFileInfo *cfile,
3453                                        loff_t off, loff_t len)
3454 {
3455         struct file_allocated_range_buffer in_data, *out_data = NULL, *tmp_data;
3456         u32 out_data_len;
3457         char *buf = NULL;
3458         loff_t l;
3459         int rc;
3460
3461         in_data.file_offset = cpu_to_le64(off);
3462         in_data.length = cpu_to_le64(len);
3463         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3464                         cfile->fid.volatile_fid,
3465                         FSCTL_QUERY_ALLOCATED_RANGES,
3466                         (char *)&in_data, sizeof(in_data),
3467                         1024 * sizeof(struct file_allocated_range_buffer),
3468                         (char **)&out_data, &out_data_len);
3469         if (rc)
3470                 goto out;
3471
3472         buf = kzalloc(1024 * 1024, GFP_KERNEL);
3473         if (buf == NULL) {
3474                 rc = -ENOMEM;
3475                 goto out;
3476         }
3477
3478         tmp_data = out_data;
3479         while (len) {
3480                 /*
3481                  * The rest of the region is unmapped so write it all.
3482                  */
3483                 if (out_data_len == 0) {
3484                         rc = smb3_simple_fallocate_write_range(xid, tcon,
3485                                                cfile, off, len, buf);
3486                         goto out;
3487                 }
3488
3489                 if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3490                         rc = -EINVAL;
3491                         goto out;
3492                 }
3493
3494                 if (off < le64_to_cpu(tmp_data->file_offset)) {
3495                         /*
3496                          * We are at a hole. Write until the end of the region
3497                          * or until the next allocated data,
3498                          * whichever comes next.
3499                          */
3500                         l = le64_to_cpu(tmp_data->file_offset) - off;
3501                         if (len < l)
3502                                 l = len;
3503                         rc = smb3_simple_fallocate_write_range(xid, tcon,
3504                                                cfile, off, l, buf);
3505                         if (rc)
3506                                 goto out;
3507                         off = off + l;
3508                         len = len - l;
3509                         if (len == 0)
3510                                 goto out;
3511                 }
3512                 /*
3513                  * We are at a section of allocated data, just skip forward
3514                  * until the end of the data or the end of the region
3515                  * we are supposed to fallocate, whichever comes first.
3516                  */
3517                 l = le64_to_cpu(tmp_data->length);
3518                 if (len < l)
3519                         l = len;
3520                 off += l;
3521                 len -= l;
3522
3523                 tmp_data = &tmp_data[1];
3524                 out_data_len -= sizeof(struct file_allocated_range_buffer);
3525         }
3526
3527  out:
3528         kfree(out_data);
3529         kfree(buf);
3530         return rc;
3531 }
3532
3533
3534 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
3535                             loff_t off, loff_t len, bool keep_size)
3536 {
3537         struct inode *inode;
3538         struct cifsInodeInfo *cifsi;
3539         struct cifsFileInfo *cfile = file->private_data;
3540         long rc = -EOPNOTSUPP;
3541         unsigned int xid;
3542         __le64 eof;
3543
3544         xid = get_xid();
3545
3546         inode = d_inode(cfile->dentry);
3547         cifsi = CIFS_I(inode);
3548
3549         trace_smb3_falloc_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3550                                 tcon->ses->Suid, off, len);
3551         /* if file not oplocked can't be sure whether asking to extend size */
3552         if (!CIFS_CACHE_READ(cifsi))
3553                 if (keep_size == false) {
3554                         trace_smb3_falloc_err(xid, cfile->fid.persistent_fid,
3555                                 tcon->tid, tcon->ses->Suid, off, len, rc);
3556                         free_xid(xid);
3557                         return rc;
3558                 }
3559
3560         /*
3561          * Extending the file
3562          */
3563         if ((keep_size == false) && i_size_read(inode) < off + len) {
3564                 rc = inode_newsize_ok(inode, off + len);
3565                 if (rc)
3566                         goto out;
3567
3568                 if (cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)
3569                         smb2_set_sparse(xid, tcon, cfile, inode, false);
3570
3571                 eof = cpu_to_le64(off + len);
3572                 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3573                                   cfile->fid.volatile_fid, cfile->pid, &eof);
3574                 if (rc == 0) {
3575                         cifsi->server_eof = off + len;
3576                         cifs_setsize(inode, off + len);
3577                         cifs_truncate_page(inode->i_mapping, inode->i_size);
3578                         truncate_setsize(inode, off + len);
3579                 }
3580                 goto out;
3581         }
3582
3583         /*
3584          * Files are non-sparse by default so falloc may be a no-op
3585          * Must check if file sparse. If not sparse, and since we are not
3586          * extending then no need to do anything since file already allocated
3587          */
3588         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
3589                 rc = 0;
3590                 goto out;
3591         }
3592
3593         if (keep_size == true) {
3594                 /*
3595                  * We can not preallocate pages beyond the end of the file
3596                  * in SMB2
3597                  */
3598                 if (off >= i_size_read(inode)) {
3599                         rc = 0;
3600                         goto out;
3601                 }
3602                 /*
3603                  * For fallocates that are partially beyond the end of file,
3604                  * clamp len so we only fallocate up to the end of file.
3605                  */
3606                 if (off + len > i_size_read(inode)) {
3607                         len = i_size_read(inode) - off;
3608                 }
3609         }
3610
3611         if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
3612                 /*
3613                  * At this point, we are trying to fallocate an internal
3614                  * regions of a sparse file. Since smb2 does not have a
3615                  * fallocate command we have two otions on how to emulate this.
3616                  * We can either turn the entire file to become non-sparse
3617                  * which we only do if the fallocate is for virtually
3618                  * the whole file,  or we can overwrite the region with zeroes
3619                  * using SMB2_write, which could be prohibitevly expensive
3620                  * if len is large.
3621                  */
3622                 /*
3623                  * We are only trying to fallocate a small region so
3624                  * just write it with zero.
3625                  */
3626                 if (len <= 1024 * 1024) {
3627                         rc = smb3_simple_fallocate_range(xid, tcon, cfile,
3628                                                          off, len);
3629                         goto out;
3630                 }
3631
3632                 /*
3633                  * Check if falloc starts within first few pages of file
3634                  * and ends within a few pages of the end of file to
3635                  * ensure that most of file is being forced to be
3636                  * fallocated now. If so then setting whole file sparse
3637                  * ie potentially making a few extra pages at the beginning
3638                  * or end of the file non-sparse via set_sparse is harmless.
3639                  */
3640                 if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) {
3641                         rc = -EOPNOTSUPP;
3642                         goto out;
3643                 }
3644         }
3645
3646         smb2_set_sparse(xid, tcon, cfile, inode, false);
3647         rc = 0;
3648
3649 out:
3650         if (rc)
3651                 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid,
3652                                 tcon->ses->Suid, off, len, rc);
3653         else
3654                 trace_smb3_falloc_done(xid, cfile->fid.persistent_fid, tcon->tid,
3655                                 tcon->ses->Suid, off, len);
3656
3657         free_xid(xid);
3658         return rc;
3659 }
3660
3661 static long smb3_collapse_range(struct file *file, struct cifs_tcon *tcon,
3662                             loff_t off, loff_t len)
3663 {
3664         int rc;
3665         unsigned int xid;
3666         struct inode *inode = file_inode(file);
3667         struct cifsFileInfo *cfile = file->private_data;
3668         struct cifsInodeInfo *cifsi = CIFS_I(inode);
3669         __le64 eof;
3670         loff_t old_eof;
3671
3672         xid = get_xid();
3673
3674         inode_lock(inode);
3675
3676         old_eof = i_size_read(inode);
3677         if ((off >= old_eof) ||
3678             off + len >= old_eof) {
3679                 rc = -EINVAL;
3680                 goto out;
3681         }
3682
3683         filemap_invalidate_lock(inode->i_mapping);
3684         rc = filemap_write_and_wait_range(inode->i_mapping, off, old_eof - 1);
3685         if (rc < 0)
3686                 goto out_2;
3687
3688         truncate_pagecache_range(inode, off, old_eof);
3689
3690         rc = smb2_copychunk_range(xid, cfile, cfile, off + len,
3691                                   old_eof - off - len, off);
3692         if (rc < 0)
3693                 goto out_2;
3694
3695         eof = cpu_to_le64(old_eof - len);
3696         rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3697                           cfile->fid.volatile_fid, cfile->pid, &eof);
3698         if (rc < 0)
3699                 goto out_2;
3700
3701         rc = 0;
3702
3703         cifsi->server_eof = i_size_read(inode) - len;
3704         truncate_setsize(inode, cifsi->server_eof);
3705         fscache_resize_cookie(cifs_inode_cookie(inode), cifsi->server_eof);
3706 out_2:
3707         filemap_invalidate_unlock(inode->i_mapping);
3708  out:
3709         inode_unlock(inode);
3710         free_xid(xid);
3711         return rc;
3712 }
3713
3714 static long smb3_insert_range(struct file *file, struct cifs_tcon *tcon,
3715                               loff_t off, loff_t len)
3716 {
3717         int rc;
3718         unsigned int xid;
3719         struct cifsFileInfo *cfile = file->private_data;
3720         struct inode *inode = file_inode(file);
3721         __le64 eof;
3722         __u64  count, old_eof;
3723
3724         xid = get_xid();
3725
3726         inode_lock(inode);
3727
3728         old_eof = i_size_read(inode);
3729         if (off >= old_eof) {
3730                 rc = -EINVAL;
3731                 goto out;
3732         }
3733
3734         count = old_eof - off;
3735         eof = cpu_to_le64(old_eof + len);
3736
3737         filemap_invalidate_lock(inode->i_mapping);
3738         rc = filemap_write_and_wait_range(inode->i_mapping, off, old_eof + len - 1);
3739         if (rc < 0)
3740                 goto out_2;
3741         truncate_pagecache_range(inode, off, old_eof);
3742
3743         rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3744                           cfile->fid.volatile_fid, cfile->pid, &eof);
3745         if (rc < 0)
3746                 goto out_2;
3747
3748         truncate_setsize(inode, old_eof + len);
3749         fscache_resize_cookie(cifs_inode_cookie(inode), i_size_read(inode));
3750
3751         rc = smb2_copychunk_range(xid, cfile, cfile, off, count, off + len);
3752         if (rc < 0)
3753                 goto out_2;
3754
3755         rc = smb3_zero_data(file, tcon, off, len, xid);
3756         if (rc < 0)
3757                 goto out_2;
3758
3759         rc = 0;
3760 out_2:
3761         filemap_invalidate_unlock(inode->i_mapping);
3762  out:
3763         inode_unlock(inode);
3764         free_xid(xid);
3765         return rc;
3766 }
3767
3768 static loff_t smb3_llseek(struct file *file, struct cifs_tcon *tcon, loff_t offset, int whence)
3769 {
3770         struct cifsFileInfo *wrcfile, *cfile = file->private_data;
3771         struct cifsInodeInfo *cifsi;
3772         struct inode *inode;
3773         int rc = 0;
3774         struct file_allocated_range_buffer in_data, *out_data = NULL;
3775         u32 out_data_len;
3776         unsigned int xid;
3777
3778         if (whence != SEEK_HOLE && whence != SEEK_DATA)
3779                 return generic_file_llseek(file, offset, whence);
3780
3781         inode = d_inode(cfile->dentry);
3782         cifsi = CIFS_I(inode);
3783
3784         if (offset < 0 || offset >= i_size_read(inode))
3785                 return -ENXIO;
3786
3787         xid = get_xid();
3788         /*
3789          * We need to be sure that all dirty pages are written as they
3790          * might fill holes on the server.
3791          * Note that we also MUST flush any written pages since at least
3792          * some servers (Windows2016) will not reflect recent writes in
3793          * QUERY_ALLOCATED_RANGES until SMB2_flush is called.
3794          */
3795         wrcfile = find_writable_file(cifsi, FIND_WR_ANY);
3796         if (wrcfile) {
3797                 filemap_write_and_wait(inode->i_mapping);
3798                 smb2_flush_file(xid, tcon, &wrcfile->fid);
3799                 cifsFileInfo_put(wrcfile);
3800         }
3801
3802         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) {
3803                 if (whence == SEEK_HOLE)
3804                         offset = i_size_read(inode);
3805                 goto lseek_exit;
3806         }
3807
3808         in_data.file_offset = cpu_to_le64(offset);
3809         in_data.length = cpu_to_le64(i_size_read(inode));
3810
3811         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3812                         cfile->fid.volatile_fid,
3813                         FSCTL_QUERY_ALLOCATED_RANGES,
3814                         (char *)&in_data, sizeof(in_data),
3815                         sizeof(struct file_allocated_range_buffer),
3816                         (char **)&out_data, &out_data_len);
3817         if (rc == -E2BIG)
3818                 rc = 0;
3819         if (rc)
3820                 goto lseek_exit;
3821
3822         if (whence == SEEK_HOLE && out_data_len == 0)
3823                 goto lseek_exit;
3824
3825         if (whence == SEEK_DATA && out_data_len == 0) {
3826                 rc = -ENXIO;
3827                 goto lseek_exit;
3828         }
3829
3830         if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3831                 rc = -EINVAL;
3832                 goto lseek_exit;
3833         }
3834         if (whence == SEEK_DATA) {
3835                 offset = le64_to_cpu(out_data->file_offset);
3836                 goto lseek_exit;
3837         }
3838         if (offset < le64_to_cpu(out_data->file_offset))
3839                 goto lseek_exit;
3840
3841         offset = le64_to_cpu(out_data->file_offset) + le64_to_cpu(out_data->length);
3842
3843  lseek_exit:
3844         free_xid(xid);
3845         kfree(out_data);
3846         if (!rc)
3847                 return vfs_setpos(file, offset, inode->i_sb->s_maxbytes);
3848         else
3849                 return rc;
3850 }
3851
3852 static int smb3_fiemap(struct cifs_tcon *tcon,
3853                        struct cifsFileInfo *cfile,
3854                        struct fiemap_extent_info *fei, u64 start, u64 len)
3855 {
3856         unsigned int xid;
3857         struct file_allocated_range_buffer in_data, *out_data;
3858         u32 out_data_len;
3859         int i, num, rc, flags, last_blob;
3860         u64 next;
3861
3862         rc = fiemap_prep(d_inode(cfile->dentry), fei, start, &len, 0);
3863         if (rc)
3864                 return rc;
3865
3866         xid = get_xid();
3867  again:
3868         in_data.file_offset = cpu_to_le64(start);
3869         in_data.length = cpu_to_le64(len);
3870
3871         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3872                         cfile->fid.volatile_fid,
3873                         FSCTL_QUERY_ALLOCATED_RANGES,
3874                         (char *)&in_data, sizeof(in_data),
3875                         1024 * sizeof(struct file_allocated_range_buffer),
3876                         (char **)&out_data, &out_data_len);
3877         if (rc == -E2BIG) {
3878                 last_blob = 0;
3879                 rc = 0;
3880         } else
3881                 last_blob = 1;
3882         if (rc)
3883                 goto out;
3884
3885         if (out_data_len && out_data_len < sizeof(struct file_allocated_range_buffer)) {
3886                 rc = -EINVAL;
3887                 goto out;
3888         }
3889         if (out_data_len % sizeof(struct file_allocated_range_buffer)) {
3890                 rc = -EINVAL;
3891                 goto out;
3892         }
3893
3894         num = out_data_len / sizeof(struct file_allocated_range_buffer);
3895         for (i = 0; i < num; i++) {
3896                 flags = 0;
3897                 if (i == num - 1 && last_blob)
3898                         flags |= FIEMAP_EXTENT_LAST;
3899
3900                 rc = fiemap_fill_next_extent(fei,
3901                                 le64_to_cpu(out_data[i].file_offset),
3902                                 le64_to_cpu(out_data[i].file_offset),
3903                                 le64_to_cpu(out_data[i].length),
3904                                 flags);
3905                 if (rc < 0)
3906                         goto out;
3907                 if (rc == 1) {
3908                         rc = 0;
3909                         goto out;
3910                 }
3911         }
3912
3913         if (!last_blob) {
3914                 next = le64_to_cpu(out_data[num - 1].file_offset) +
3915                   le64_to_cpu(out_data[num - 1].length);
3916                 len = len - (next - start);
3917                 start = next;
3918                 goto again;
3919         }
3920
3921  out:
3922         free_xid(xid);
3923         kfree(out_data);
3924         return rc;
3925 }
3926
3927 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
3928                            loff_t off, loff_t len)
3929 {
3930         /* KEEP_SIZE already checked for by do_fallocate */
3931         if (mode & FALLOC_FL_PUNCH_HOLE)
3932                 return smb3_punch_hole(file, tcon, off, len);
3933         else if (mode & FALLOC_FL_ZERO_RANGE) {
3934                 if (mode & FALLOC_FL_KEEP_SIZE)
3935                         return smb3_zero_range(file, tcon, off, len, true);
3936                 return smb3_zero_range(file, tcon, off, len, false);
3937         } else if (mode == FALLOC_FL_KEEP_SIZE)
3938                 return smb3_simple_falloc(file, tcon, off, len, true);
3939         else if (mode == FALLOC_FL_COLLAPSE_RANGE)
3940                 return smb3_collapse_range(file, tcon, off, len);
3941         else if (mode == FALLOC_FL_INSERT_RANGE)
3942                 return smb3_insert_range(file, tcon, off, len);
3943         else if (mode == 0)
3944                 return smb3_simple_falloc(file, tcon, off, len, false);
3945
3946         return -EOPNOTSUPP;
3947 }
3948
3949 static void
3950 smb2_downgrade_oplock(struct TCP_Server_Info *server,
3951                       struct cifsInodeInfo *cinode, __u32 oplock,
3952                       unsigned int epoch, bool *purge_cache)
3953 {
3954         server->ops->set_oplock_level(cinode, oplock, 0, NULL);
3955 }
3956
3957 static void
3958 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3959                        unsigned int epoch, bool *purge_cache);
3960
3961 static void
3962 smb3_downgrade_oplock(struct TCP_Server_Info *server,
3963                        struct cifsInodeInfo *cinode, __u32 oplock,
3964                        unsigned int epoch, bool *purge_cache)
3965 {
3966         unsigned int old_state = cinode->oplock;
3967         unsigned int old_epoch = cinode->epoch;
3968         unsigned int new_state;
3969
3970         if (epoch > old_epoch) {
3971                 smb21_set_oplock_level(cinode, oplock, 0, NULL);
3972                 cinode->epoch = epoch;
3973         }
3974
3975         new_state = cinode->oplock;
3976         *purge_cache = false;
3977
3978         if ((old_state & CIFS_CACHE_READ_FLG) != 0 &&
3979             (new_state & CIFS_CACHE_READ_FLG) == 0)
3980                 *purge_cache = true;
3981         else if (old_state == new_state && (epoch - old_epoch > 1))
3982                 *purge_cache = true;
3983 }
3984
3985 static void
3986 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3987                       unsigned int epoch, bool *purge_cache)
3988 {
3989         oplock &= 0xFF;
3990         cinode->lease_granted = false;
3991         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
3992                 return;
3993         if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
3994                 cinode->oplock = CIFS_CACHE_RHW_FLG;
3995                 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
3996                          &cinode->netfs.inode);
3997         } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
3998                 cinode->oplock = CIFS_CACHE_RW_FLG;
3999                 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
4000                          &cinode->netfs.inode);
4001         } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
4002                 cinode->oplock = CIFS_CACHE_READ_FLG;
4003                 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
4004                          &cinode->netfs.inode);
4005         } else
4006                 cinode->oplock = 0;
4007 }
4008
4009 static void
4010 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
4011                        unsigned int epoch, bool *purge_cache)
4012 {
4013         char message[5] = {0};
4014         unsigned int new_oplock = 0;
4015
4016         oplock &= 0xFF;
4017         cinode->lease_granted = true;
4018         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
4019                 return;
4020
4021         /* Check if the server granted an oplock rather than a lease */
4022         if (oplock & SMB2_OPLOCK_LEVEL_EXCLUSIVE)
4023                 return smb2_set_oplock_level(cinode, oplock, epoch,
4024                                              purge_cache);
4025
4026         if (oplock & SMB2_LEASE_READ_CACHING_HE) {
4027                 new_oplock |= CIFS_CACHE_READ_FLG;
4028                 strcat(message, "R");
4029         }
4030         if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
4031                 new_oplock |= CIFS_CACHE_HANDLE_FLG;
4032                 strcat(message, "H");
4033         }
4034         if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
4035                 new_oplock |= CIFS_CACHE_WRITE_FLG;
4036                 strcat(message, "W");
4037         }
4038         if (!new_oplock)
4039                 strncpy(message, "None", sizeof(message));
4040
4041         cinode->oplock = new_oplock;
4042         cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
4043                  &cinode->netfs.inode);
4044 }
4045
4046 static void
4047 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
4048                       unsigned int epoch, bool *purge_cache)
4049 {
4050         unsigned int old_oplock = cinode->oplock;
4051
4052         smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
4053
4054         if (purge_cache) {
4055                 *purge_cache = false;
4056                 if (old_oplock == CIFS_CACHE_READ_FLG) {
4057                         if (cinode->oplock == CIFS_CACHE_READ_FLG &&
4058                             (epoch - cinode->epoch > 0))
4059                                 *purge_cache = true;
4060                         else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
4061                                  (epoch - cinode->epoch > 1))
4062                                 *purge_cache = true;
4063                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
4064                                  (epoch - cinode->epoch > 1))
4065                                 *purge_cache = true;
4066                         else if (cinode->oplock == 0 &&
4067                                  (epoch - cinode->epoch > 0))
4068                                 *purge_cache = true;
4069                 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
4070                         if (cinode->oplock == CIFS_CACHE_RH_FLG &&
4071                             (epoch - cinode->epoch > 0))
4072                                 *purge_cache = true;
4073                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
4074                                  (epoch - cinode->epoch > 1))
4075                                 *purge_cache = true;
4076                 }
4077                 cinode->epoch = epoch;
4078         }
4079 }
4080
4081 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
4082 static bool
4083 smb2_is_read_op(__u32 oplock)
4084 {
4085         return oplock == SMB2_OPLOCK_LEVEL_II;
4086 }
4087 #endif /* CIFS_ALLOW_INSECURE_LEGACY */
4088
4089 static bool
4090 smb21_is_read_op(__u32 oplock)
4091 {
4092         return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
4093                !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
4094 }
4095
4096 static __le32
4097 map_oplock_to_lease(u8 oplock)
4098 {
4099         if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
4100                 return SMB2_LEASE_WRITE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE;
4101         else if (oplock == SMB2_OPLOCK_LEVEL_II)
4102                 return SMB2_LEASE_READ_CACHING_LE;
4103         else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
4104                 return SMB2_LEASE_HANDLE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE |
4105                        SMB2_LEASE_WRITE_CACHING_LE;
4106         return 0;
4107 }
4108
4109 static char *
4110 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
4111 {
4112         struct create_lease *buf;
4113
4114         buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
4115         if (!buf)
4116                 return NULL;
4117
4118         memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
4119         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
4120
4121         buf->ccontext.DataOffset = cpu_to_le16(offsetof
4122                                         (struct create_lease, lcontext));
4123         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
4124         buf->ccontext.NameOffset = cpu_to_le16(offsetof
4125                                 (struct create_lease, Name));
4126         buf->ccontext.NameLength = cpu_to_le16(4);
4127         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
4128         buf->Name[0] = 'R';
4129         buf->Name[1] = 'q';
4130         buf->Name[2] = 'L';
4131         buf->Name[3] = 's';
4132         return (char *)buf;
4133 }
4134
4135 static char *
4136 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
4137 {
4138         struct create_lease_v2 *buf;
4139
4140         buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
4141         if (!buf)
4142                 return NULL;
4143
4144         memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
4145         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
4146
4147         buf->ccontext.DataOffset = cpu_to_le16(offsetof
4148                                         (struct create_lease_v2, lcontext));
4149         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
4150         buf->ccontext.NameOffset = cpu_to_le16(offsetof
4151                                 (struct create_lease_v2, Name));
4152         buf->ccontext.NameLength = cpu_to_le16(4);
4153         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
4154         buf->Name[0] = 'R';
4155         buf->Name[1] = 'q';
4156         buf->Name[2] = 'L';
4157         buf->Name[3] = 's';
4158         return (char *)buf;
4159 }
4160
4161 static __u8
4162 smb2_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
4163 {
4164         struct create_lease *lc = (struct create_lease *)buf;
4165
4166         *epoch = 0; /* not used */
4167         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE)
4168                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
4169         return le32_to_cpu(lc->lcontext.LeaseState);
4170 }
4171
4172 static __u8
4173 smb3_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
4174 {
4175         struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
4176
4177         *epoch = le16_to_cpu(lc->lcontext.Epoch);
4178         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE)
4179                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
4180         if (lease_key)
4181                 memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE);
4182         return le32_to_cpu(lc->lcontext.LeaseState);
4183 }
4184
4185 static unsigned int
4186 smb2_wp_retry_size(struct inode *inode)
4187 {
4188         return min_t(unsigned int, CIFS_SB(inode->i_sb)->ctx->wsize,
4189                      SMB2_MAX_BUFFER_SIZE);
4190 }
4191
4192 static bool
4193 smb2_dir_needs_close(struct cifsFileInfo *cfile)
4194 {
4195         return !cfile->invalidHandle;
4196 }
4197
4198 static void
4199 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len,
4200                    struct smb_rqst *old_rq, __le16 cipher_type)
4201 {
4202         struct smb2_hdr *shdr =
4203                         (struct smb2_hdr *)old_rq->rq_iov[0].iov_base;
4204
4205         memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
4206         tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
4207         tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
4208         tr_hdr->Flags = cpu_to_le16(0x01);
4209         if ((cipher_type == SMB2_ENCRYPTION_AES128_GCM) ||
4210             (cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4211                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
4212         else
4213                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
4214         memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8);
4215 }
4216
4217 static void *smb2_aead_req_alloc(struct crypto_aead *tfm, const struct smb_rqst *rqst,
4218                                  int num_rqst, const u8 *sig, u8 **iv,
4219                                  struct aead_request **req, struct sg_table *sgt,
4220                                  unsigned int *num_sgs, size_t *sensitive_size)
4221 {
4222         unsigned int req_size = sizeof(**req) + crypto_aead_reqsize(tfm);
4223         unsigned int iv_size = crypto_aead_ivsize(tfm);
4224         unsigned int len;
4225         u8 *p;
4226
4227         *num_sgs = cifs_get_num_sgs(rqst, num_rqst, sig);
4228         if (IS_ERR_VALUE((long)(int)*num_sgs))
4229                 return ERR_PTR(*num_sgs);
4230
4231         len = iv_size;
4232         len += crypto_aead_alignmask(tfm) & ~(crypto_tfm_ctx_alignment() - 1);
4233         len = ALIGN(len, crypto_tfm_ctx_alignment());
4234         len += req_size;
4235         len = ALIGN(len, __alignof__(struct scatterlist));
4236         len += array_size(*num_sgs, sizeof(struct scatterlist));
4237         *sensitive_size = len;
4238
4239         p = kvzalloc(len, GFP_NOFS);
4240         if (!p)
4241                 return ERR_PTR(-ENOMEM);
4242
4243         *iv = (u8 *)PTR_ALIGN(p, crypto_aead_alignmask(tfm) + 1);
4244         *req = (struct aead_request *)PTR_ALIGN(*iv + iv_size,
4245                                                 crypto_tfm_ctx_alignment());
4246         sgt->sgl = (struct scatterlist *)PTR_ALIGN((u8 *)*req + req_size,
4247                                                    __alignof__(struct scatterlist));
4248         return p;
4249 }
4250
4251 static void *smb2_get_aead_req(struct crypto_aead *tfm, struct smb_rqst *rqst,
4252                                int num_rqst, const u8 *sig, u8 **iv,
4253                                struct aead_request **req, struct scatterlist **sgl,
4254                                size_t *sensitive_size)
4255 {
4256         struct sg_table sgtable = {};
4257         unsigned int skip, num_sgs, i, j;
4258         ssize_t rc;
4259         void *p;
4260
4261         p = smb2_aead_req_alloc(tfm, rqst, num_rqst, sig, iv, req, &sgtable,
4262                                 &num_sgs, sensitive_size);
4263         if (IS_ERR(p))
4264                 return ERR_CAST(p);
4265
4266         sg_init_marker(sgtable.sgl, num_sgs);
4267
4268         /*
4269          * The first rqst has a transform header where the
4270          * first 20 bytes are not part of the encrypted blob.
4271          */
4272         skip = 20;
4273
4274         for (i = 0; i < num_rqst; i++) {
4275                 struct iov_iter *iter = &rqst[i].rq_iter;
4276                 size_t count = iov_iter_count(iter);
4277
4278                 for (j = 0; j < rqst[i].rq_nvec; j++) {
4279                         cifs_sg_set_buf(&sgtable,
4280                                         rqst[i].rq_iov[j].iov_base + skip,
4281                                         rqst[i].rq_iov[j].iov_len - skip);
4282
4283                         /* See the above comment on the 'skip' assignment */
4284                         skip = 0;
4285                 }
4286                 sgtable.orig_nents = sgtable.nents;
4287
4288                 rc = extract_iter_to_sg(iter, count, &sgtable,
4289                                         num_sgs - sgtable.nents, 0);
4290                 iov_iter_revert(iter, rc);
4291                 sgtable.orig_nents = sgtable.nents;
4292         }
4293
4294         cifs_sg_set_buf(&sgtable, sig, SMB2_SIGNATURE_SIZE);
4295         sg_mark_end(&sgtable.sgl[sgtable.nents - 1]);
4296         *sgl = sgtable.sgl;
4297         return p;
4298 }
4299
4300 static int
4301 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)
4302 {
4303         struct TCP_Server_Info *pserver;
4304         struct cifs_ses *ses;
4305         u8 *ses_enc_key;
4306
4307         /* If server is a channel, select the primary channel */
4308         pserver = SERVER_IS_CHAN(server) ? server->primary_server : server;
4309
4310         spin_lock(&cifs_tcp_ses_lock);
4311         list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) {
4312                 if (ses->Suid == ses_id) {
4313                         spin_lock(&ses->ses_lock);
4314                         ses_enc_key = enc ? ses->smb3encryptionkey :
4315                                 ses->smb3decryptionkey;
4316                         memcpy(key, ses_enc_key, SMB3_ENC_DEC_KEY_SIZE);
4317                         spin_unlock(&ses->ses_lock);
4318                         spin_unlock(&cifs_tcp_ses_lock);
4319                         return 0;
4320                 }
4321         }
4322         spin_unlock(&cifs_tcp_ses_lock);
4323
4324         trace_smb3_ses_not_found(ses_id);
4325
4326         return -EAGAIN;
4327 }
4328 /*
4329  * Encrypt or decrypt @rqst message. @rqst[0] has the following format:
4330  * iov[0]   - transform header (associate data),
4331  * iov[1-N] - SMB2 header and pages - data to encrypt.
4332  * On success return encrypted data in iov[1-N] and pages, leave iov[0]
4333  * untouched.
4334  */
4335 static int
4336 crypt_message(struct TCP_Server_Info *server, int num_rqst,
4337               struct smb_rqst *rqst, int enc)
4338 {
4339         struct smb2_transform_hdr *tr_hdr =
4340                 (struct smb2_transform_hdr *)rqst[0].rq_iov[0].iov_base;
4341         unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20;
4342         int rc = 0;
4343         struct scatterlist *sg;
4344         u8 sign[SMB2_SIGNATURE_SIZE] = {};
4345         u8 key[SMB3_ENC_DEC_KEY_SIZE];
4346         struct aead_request *req;
4347         u8 *iv;
4348         DECLARE_CRYPTO_WAIT(wait);
4349         struct crypto_aead *tfm;
4350         unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
4351         void *creq;
4352         size_t sensitive_size;
4353
4354         rc = smb2_get_enc_key(server, le64_to_cpu(tr_hdr->SessionId), enc, key);
4355         if (rc) {
4356                 cifs_server_dbg(FYI, "%s: Could not get %scryption key. sid: 0x%llx\n", __func__,
4357                          enc ? "en" : "de", le64_to_cpu(tr_hdr->SessionId));
4358                 return rc;
4359         }
4360
4361         rc = smb3_crypto_aead_allocate(server);
4362         if (rc) {
4363                 cifs_server_dbg(VFS, "%s: crypto alloc failed\n", __func__);
4364                 return rc;
4365         }
4366
4367         tfm = enc ? server->secmech.enc : server->secmech.dec;
4368
4369         if ((server->cipher_type == SMB2_ENCRYPTION_AES256_CCM) ||
4370                 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4371                 rc = crypto_aead_setkey(tfm, key, SMB3_GCM256_CRYPTKEY_SIZE);
4372         else
4373                 rc = crypto_aead_setkey(tfm, key, SMB3_GCM128_CRYPTKEY_SIZE);
4374
4375         if (rc) {
4376                 cifs_server_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc);
4377                 return rc;
4378         }
4379
4380         rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE);
4381         if (rc) {
4382                 cifs_server_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc);
4383                 return rc;
4384         }
4385
4386         creq = smb2_get_aead_req(tfm, rqst, num_rqst, sign, &iv, &req, &sg,
4387                                  &sensitive_size);
4388         if (IS_ERR(creq))
4389                 return PTR_ERR(creq);
4390
4391         if (!enc) {
4392                 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE);
4393                 crypt_len += SMB2_SIGNATURE_SIZE;
4394         }
4395
4396         if ((server->cipher_type == SMB2_ENCRYPTION_AES128_GCM) ||
4397             (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4398                 memcpy(iv, (char *)tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
4399         else {
4400                 iv[0] = 3;
4401                 memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
4402         }
4403
4404         aead_request_set_tfm(req, tfm);
4405         aead_request_set_crypt(req, sg, sg, crypt_len, iv);
4406         aead_request_set_ad(req, assoc_data_len);
4407
4408         aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
4409                                   crypto_req_done, &wait);
4410
4411         rc = crypto_wait_req(enc ? crypto_aead_encrypt(req)
4412                                 : crypto_aead_decrypt(req), &wait);
4413
4414         if (!rc && enc)
4415                 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE);
4416
4417         kvfree_sensitive(creq, sensitive_size);
4418         return rc;
4419 }
4420
4421 /*
4422  * Clear a read buffer, discarding the folios which have XA_MARK_0 set.
4423  */
4424 static void cifs_clear_xarray_buffer(struct xarray *buffer)
4425 {
4426         struct folio *folio;
4427
4428         XA_STATE(xas, buffer, 0);
4429
4430         rcu_read_lock();
4431         xas_for_each_marked(&xas, folio, ULONG_MAX, XA_MARK_0) {
4432                 folio_put(folio);
4433         }
4434         rcu_read_unlock();
4435         xa_destroy(buffer);
4436 }
4437
4438 void
4439 smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst)
4440 {
4441         int i;
4442
4443         for (i = 0; i < num_rqst; i++)
4444                 if (!xa_empty(&rqst[i].rq_buffer))
4445                         cifs_clear_xarray_buffer(&rqst[i].rq_buffer);
4446 }
4447
4448 /*
4449  * This function will initialize new_rq and encrypt the content.
4450  * The first entry, new_rq[0], only contains a single iov which contains
4451  * a smb2_transform_hdr and is pre-allocated by the caller.
4452  * This function then populates new_rq[1+] with the content from olq_rq[0+].
4453  *
4454  * The end result is an array of smb_rqst structures where the first structure
4455  * only contains a single iov for the transform header which we then can pass
4456  * to crypt_message().
4457  *
4458  * new_rq[0].rq_iov[0] :  smb2_transform_hdr pre-allocated by the caller
4459  * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests
4460  */
4461 static int
4462 smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst,
4463                        struct smb_rqst *new_rq, struct smb_rqst *old_rq)
4464 {
4465         struct smb2_transform_hdr *tr_hdr = new_rq[0].rq_iov[0].iov_base;
4466         struct page *page;
4467         unsigned int orig_len = 0;
4468         int i, j;
4469         int rc = -ENOMEM;
4470
4471         for (i = 1; i < num_rqst; i++) {
4472                 struct smb_rqst *old = &old_rq[i - 1];
4473                 struct smb_rqst *new = &new_rq[i];
4474                 struct xarray *buffer = &new->rq_buffer;
4475                 size_t size = iov_iter_count(&old->rq_iter), seg, copied = 0;
4476
4477                 orig_len += smb_rqst_len(server, old);
4478                 new->rq_iov = old->rq_iov;
4479                 new->rq_nvec = old->rq_nvec;
4480
4481                 xa_init(buffer);
4482
4483                 if (size > 0) {
4484                         unsigned int npages = DIV_ROUND_UP(size, PAGE_SIZE);
4485
4486                         for (j = 0; j < npages; j++) {
4487                                 void *o;
4488
4489                                 rc = -ENOMEM;
4490                                 page = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
4491                                 if (!page)
4492                                         goto err_free;
4493                                 page->index = j;
4494                                 o = xa_store(buffer, j, page, GFP_KERNEL);
4495                                 if (xa_is_err(o)) {
4496                                         rc = xa_err(o);
4497                                         put_page(page);
4498                                         goto err_free;
4499                                 }
4500
4501                                 xa_set_mark(buffer, j, XA_MARK_0);
4502
4503                                 seg = min_t(size_t, size - copied, PAGE_SIZE);
4504                                 if (copy_page_from_iter(page, 0, seg, &old->rq_iter) != seg) {
4505                                         rc = -EFAULT;
4506                                         goto err_free;
4507                                 }
4508                                 copied += seg;
4509                         }
4510                         iov_iter_xarray(&new->rq_iter, ITER_SOURCE,
4511                                         buffer, 0, size);
4512                         new->rq_iter_size = size;
4513                 }
4514         }
4515
4516         /* fill the 1st iov with a transform header */
4517         fill_transform_hdr(tr_hdr, orig_len, old_rq, server->cipher_type);
4518
4519         rc = crypt_message(server, num_rqst, new_rq, 1);
4520         cifs_dbg(FYI, "Encrypt message returned %d\n", rc);
4521         if (rc)
4522                 goto err_free;
4523
4524         return rc;
4525
4526 err_free:
4527         smb3_free_compound_rqst(num_rqst - 1, &new_rq[1]);
4528         return rc;
4529 }
4530
4531 static int
4532 smb3_is_transform_hdr(void *buf)
4533 {
4534         struct smb2_transform_hdr *trhdr = buf;
4535
4536         return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
4537 }
4538
4539 static int
4540 decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
4541                  unsigned int buf_data_size, struct iov_iter *iter,
4542                  bool is_offloaded)
4543 {
4544         struct kvec iov[2];
4545         struct smb_rqst rqst = {NULL};
4546         size_t iter_size = 0;
4547         int rc;
4548
4549         iov[0].iov_base = buf;
4550         iov[0].iov_len = sizeof(struct smb2_transform_hdr);
4551         iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr);
4552         iov[1].iov_len = buf_data_size;
4553
4554         rqst.rq_iov = iov;
4555         rqst.rq_nvec = 2;
4556         if (iter) {
4557                 rqst.rq_iter = *iter;
4558                 rqst.rq_iter_size = iov_iter_count(iter);
4559                 iter_size = iov_iter_count(iter);
4560         }
4561
4562         rc = crypt_message(server, 1, &rqst, 0);
4563         cifs_dbg(FYI, "Decrypt message returned %d\n", rc);
4564
4565         if (rc)
4566                 return rc;
4567
4568         memmove(buf, iov[1].iov_base, buf_data_size);
4569
4570         if (!is_offloaded)
4571                 server->total_read = buf_data_size + iter_size;
4572
4573         return rc;
4574 }
4575
4576 static int
4577 cifs_copy_pages_to_iter(struct xarray *pages, unsigned int data_size,
4578                         unsigned int skip, struct iov_iter *iter)
4579 {
4580         struct page *page;
4581         unsigned long index;
4582
4583         xa_for_each(pages, index, page) {
4584                 size_t n, len = min_t(unsigned int, PAGE_SIZE - skip, data_size);
4585
4586                 n = copy_page_to_iter(page, skip, len, iter);
4587                 if (n != len) {
4588                         cifs_dbg(VFS, "%s: something went wrong\n", __func__);
4589                         return -EIO;
4590                 }
4591                 data_size -= n;
4592                 skip = 0;
4593         }
4594
4595         return 0;
4596 }
4597
4598 static int
4599 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
4600                  char *buf, unsigned int buf_len, struct xarray *pages,
4601                  unsigned int pages_len, bool is_offloaded)
4602 {
4603         unsigned int data_offset;
4604         unsigned int data_len;
4605         unsigned int cur_off;
4606         unsigned int cur_page_idx;
4607         unsigned int pad_len;
4608         struct cifs_readdata *rdata = mid->callback_data;
4609         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
4610         int length;
4611         bool use_rdma_mr = false;
4612
4613         if (shdr->Command != SMB2_READ) {
4614                 cifs_server_dbg(VFS, "only big read responses are supported\n");
4615                 return -EOPNOTSUPP;
4616         }
4617
4618         if (server->ops->is_session_expired &&
4619             server->ops->is_session_expired(buf)) {
4620                 if (!is_offloaded)
4621                         cifs_reconnect(server, true);
4622                 return -1;
4623         }
4624
4625         if (server->ops->is_status_pending &&
4626                         server->ops->is_status_pending(buf, server))
4627                 return -1;
4628
4629         /* set up first two iov to get credits */
4630         rdata->iov[0].iov_base = buf;
4631         rdata->iov[0].iov_len = 0;
4632         rdata->iov[1].iov_base = buf;
4633         rdata->iov[1].iov_len =
4634                 min_t(unsigned int, buf_len, server->vals->read_rsp_size);
4635         cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
4636                  rdata->iov[0].iov_base, rdata->iov[0].iov_len);
4637         cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n",
4638                  rdata->iov[1].iov_base, rdata->iov[1].iov_len);
4639
4640         rdata->result = server->ops->map_error(buf, true);
4641         if (rdata->result != 0) {
4642                 cifs_dbg(FYI, "%s: server returned error %d\n",
4643                          __func__, rdata->result);
4644                 /* normal error on read response */
4645                 if (is_offloaded)
4646                         mid->mid_state = MID_RESPONSE_RECEIVED;
4647                 else
4648                         dequeue_mid(mid, false);
4649                 return 0;
4650         }
4651
4652         data_offset = server->ops->read_data_offset(buf);
4653 #ifdef CONFIG_CIFS_SMB_DIRECT
4654         use_rdma_mr = rdata->mr;
4655 #endif
4656         data_len = server->ops->read_data_length(buf, use_rdma_mr);
4657
4658         if (data_offset < server->vals->read_rsp_size) {
4659                 /*
4660                  * win2k8 sometimes sends an offset of 0 when the read
4661                  * is beyond the EOF. Treat it as if the data starts just after
4662                  * the header.
4663                  */
4664                 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n",
4665                          __func__, data_offset);
4666                 data_offset = server->vals->read_rsp_size;
4667         } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) {
4668                 /* data_offset is beyond the end of smallbuf */
4669                 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\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         pad_len = data_offset - server->vals->read_rsp_size;
4680
4681         if (buf_len <= data_offset) {
4682                 /* read response payload is in pages */
4683                 cur_page_idx = pad_len / PAGE_SIZE;
4684                 cur_off = pad_len % PAGE_SIZE;
4685
4686                 if (cur_page_idx != 0) {
4687                         /* data offset is beyond the 1st page of response */
4688                         cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n",
4689                                  __func__, data_offset);
4690                         rdata->result = -EIO;
4691                         if (is_offloaded)
4692                                 mid->mid_state = MID_RESPONSE_MALFORMED;
4693                         else
4694                                 dequeue_mid(mid, rdata->result);
4695                         return 0;
4696                 }
4697
4698                 if (data_len > pages_len - pad_len) {
4699                         /* data_len is corrupt -- discard frame */
4700                         rdata->result = -EIO;
4701                         if (is_offloaded)
4702                                 mid->mid_state = MID_RESPONSE_MALFORMED;
4703                         else
4704                                 dequeue_mid(mid, rdata->result);
4705                         return 0;
4706                 }
4707
4708                 /* Copy the data to the output I/O iterator. */
4709                 rdata->result = cifs_copy_pages_to_iter(pages, pages_len,
4710                                                         cur_off, &rdata->iter);
4711                 if (rdata->result != 0) {
4712                         if (is_offloaded)
4713                                 mid->mid_state = MID_RESPONSE_MALFORMED;
4714                         else
4715                                 dequeue_mid(mid, rdata->result);
4716                         return 0;
4717                 }
4718                 rdata->got_bytes = pages_len;
4719
4720         } else if (buf_len >= data_offset + data_len) {
4721                 /* read response payload is in buf */
4722                 WARN_ONCE(pages && !xa_empty(pages),
4723                           "read data can be either in buf or in pages");
4724                 length = copy_to_iter(buf + data_offset, data_len, &rdata->iter);
4725                 if (length < 0)
4726                         return length;
4727                 rdata->got_bytes = data_len;
4728         } else {
4729                 /* read response payload cannot be in both buf and pages */
4730                 WARN_ONCE(1, "buf can not contain only a part of read data");
4731                 rdata->result = -EIO;
4732                 if (is_offloaded)
4733                         mid->mid_state = MID_RESPONSE_MALFORMED;
4734                 else
4735                         dequeue_mid(mid, rdata->result);
4736                 return 0;
4737         }
4738
4739         if (is_offloaded)
4740                 mid->mid_state = MID_RESPONSE_RECEIVED;
4741         else
4742                 dequeue_mid(mid, false);
4743         return 0;
4744 }
4745
4746 struct smb2_decrypt_work {
4747         struct work_struct decrypt;
4748         struct TCP_Server_Info *server;
4749         struct xarray buffer;
4750         char *buf;
4751         unsigned int len;
4752 };
4753
4754
4755 static void smb2_decrypt_offload(struct work_struct *work)
4756 {
4757         struct smb2_decrypt_work *dw = container_of(work,
4758                                 struct smb2_decrypt_work, decrypt);
4759         int rc;
4760         struct mid_q_entry *mid;
4761         struct iov_iter iter;
4762
4763         iov_iter_xarray(&iter, ITER_DEST, &dw->buffer, 0, dw->len);
4764         rc = decrypt_raw_data(dw->server, dw->buf, dw->server->vals->read_rsp_size,
4765                               &iter, true);
4766         if (rc) {
4767                 cifs_dbg(VFS, "error decrypting rc=%d\n", rc);
4768                 goto free_pages;
4769         }
4770
4771         dw->server->lstrp = jiffies;
4772         mid = smb2_find_dequeue_mid(dw->server, dw->buf);
4773         if (mid == NULL)
4774                 cifs_dbg(FYI, "mid not found\n");
4775         else {
4776                 mid->decrypted = true;
4777                 rc = handle_read_data(dw->server, mid, dw->buf,
4778                                       dw->server->vals->read_rsp_size,
4779                                       &dw->buffer, dw->len,
4780                                       true);
4781                 if (rc >= 0) {
4782 #ifdef CONFIG_CIFS_STATS2
4783                         mid->when_received = jiffies;
4784 #endif
4785                         if (dw->server->ops->is_network_name_deleted)
4786                                 dw->server->ops->is_network_name_deleted(dw->buf,
4787                                                                          dw->server);
4788
4789                         mid->callback(mid);
4790                 } else {
4791                         spin_lock(&dw->server->srv_lock);
4792                         if (dw->server->tcpStatus == CifsNeedReconnect) {
4793                                 spin_lock(&dw->server->mid_lock);
4794                                 mid->mid_state = MID_RETRY_NEEDED;
4795                                 spin_unlock(&dw->server->mid_lock);
4796                                 spin_unlock(&dw->server->srv_lock);
4797                                 mid->callback(mid);
4798                         } else {
4799                                 spin_lock(&dw->server->mid_lock);
4800                                 mid->mid_state = MID_REQUEST_SUBMITTED;
4801                                 mid->mid_flags &= ~(MID_DELETED);
4802                                 list_add_tail(&mid->qhead,
4803                                         &dw->server->pending_mid_q);
4804                                 spin_unlock(&dw->server->mid_lock);
4805                                 spin_unlock(&dw->server->srv_lock);
4806                         }
4807                 }
4808                 release_mid(mid);
4809         }
4810
4811 free_pages:
4812         cifs_clear_xarray_buffer(&dw->buffer);
4813         cifs_small_buf_release(dw->buf);
4814         kfree(dw);
4815 }
4816
4817
4818 static int
4819 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid,
4820                        int *num_mids)
4821 {
4822         struct page *page;
4823         char *buf = server->smallbuf;
4824         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
4825         struct iov_iter iter;
4826         unsigned int len, npages;
4827         unsigned int buflen = server->pdu_size;
4828         int rc;
4829         int i = 0;
4830         struct smb2_decrypt_work *dw;
4831
4832         dw = kzalloc(sizeof(struct smb2_decrypt_work), GFP_KERNEL);
4833         if (!dw)
4834                 return -ENOMEM;
4835         xa_init(&dw->buffer);
4836         INIT_WORK(&dw->decrypt, smb2_decrypt_offload);
4837         dw->server = server;
4838
4839         *num_mids = 1;
4840         len = min_t(unsigned int, buflen, server->vals->read_rsp_size +
4841                 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1;
4842
4843         rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len);
4844         if (rc < 0)
4845                 goto free_dw;
4846         server->total_read += rc;
4847
4848         len = le32_to_cpu(tr_hdr->OriginalMessageSize) -
4849                 server->vals->read_rsp_size;
4850         dw->len = len;
4851         npages = DIV_ROUND_UP(len, PAGE_SIZE);
4852
4853         rc = -ENOMEM;
4854         for (; i < npages; i++) {
4855                 void *old;
4856
4857                 page = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
4858                 if (!page)
4859                         goto discard_data;
4860                 page->index = i;
4861                 old = xa_store(&dw->buffer, i, page, GFP_KERNEL);
4862                 if (xa_is_err(old)) {
4863                         rc = xa_err(old);
4864                         put_page(page);
4865                         goto discard_data;
4866                 }
4867                 xa_set_mark(&dw->buffer, i, XA_MARK_0);
4868         }
4869
4870         iov_iter_xarray(&iter, ITER_DEST, &dw->buffer, 0, npages * PAGE_SIZE);
4871
4872         /* Read the data into the buffer and clear excess bufferage. */
4873         rc = cifs_read_iter_from_socket(server, &iter, dw->len);
4874         if (rc < 0)
4875                 goto discard_data;
4876
4877         server->total_read += rc;
4878         if (rc < npages * PAGE_SIZE)
4879                 iov_iter_zero(npages * PAGE_SIZE - rc, &iter);
4880         iov_iter_revert(&iter, npages * PAGE_SIZE);
4881         iov_iter_truncate(&iter, dw->len);
4882
4883         rc = cifs_discard_remaining_data(server);
4884         if (rc)
4885                 goto free_pages;
4886
4887         /*
4888          * For large reads, offload to different thread for better performance,
4889          * use more cores decrypting which can be expensive
4890          */
4891
4892         if ((server->min_offload) && (server->in_flight > 1) &&
4893             (server->pdu_size >= server->min_offload)) {
4894                 dw->buf = server->smallbuf;
4895                 server->smallbuf = (char *)cifs_small_buf_get();
4896
4897                 queue_work(decrypt_wq, &dw->decrypt);
4898                 *num_mids = 0; /* worker thread takes care of finding mid */
4899                 return -1;
4900         }
4901
4902         rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size,
4903                               &iter, false);
4904         if (rc)
4905                 goto free_pages;
4906
4907         *mid = smb2_find_mid(server, buf);
4908         if (*mid == NULL) {
4909                 cifs_dbg(FYI, "mid not found\n");
4910         } else {
4911                 cifs_dbg(FYI, "mid found\n");
4912                 (*mid)->decrypted = true;
4913                 rc = handle_read_data(server, *mid, buf,
4914                                       server->vals->read_rsp_size,
4915                                       &dw->buffer, dw->len, false);
4916                 if (rc >= 0) {
4917                         if (server->ops->is_network_name_deleted) {
4918                                 server->ops->is_network_name_deleted(buf,
4919                                                                 server);
4920                         }
4921                 }
4922         }
4923
4924 free_pages:
4925         cifs_clear_xarray_buffer(&dw->buffer);
4926 free_dw:
4927         kfree(dw);
4928         return rc;
4929 discard_data:
4930         cifs_discard_remaining_data(server);
4931         goto free_pages;
4932 }
4933
4934 static int
4935 receive_encrypted_standard(struct TCP_Server_Info *server,
4936                            struct mid_q_entry **mids, char **bufs,
4937                            int *num_mids)
4938 {
4939         int ret, length;
4940         char *buf = server->smallbuf;
4941         struct smb2_hdr *shdr;
4942         unsigned int pdu_length = server->pdu_size;
4943         unsigned int buf_size;
4944         unsigned int next_cmd;
4945         struct mid_q_entry *mid_entry;
4946         int next_is_large;
4947         char *next_buffer = NULL;
4948
4949         *num_mids = 0;
4950
4951         /* switch to large buffer if too big for a small one */
4952         if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) {
4953                 server->large_buf = true;
4954                 memcpy(server->bigbuf, buf, server->total_read);
4955                 buf = server->bigbuf;
4956         }
4957
4958         /* now read the rest */
4959         length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
4960                                 pdu_length - HEADER_SIZE(server) + 1);
4961         if (length < 0)
4962                 return length;
4963         server->total_read += length;
4964
4965         buf_size = pdu_length - sizeof(struct smb2_transform_hdr);
4966         length = decrypt_raw_data(server, buf, buf_size, NULL, false);
4967         if (length)
4968                 return length;
4969
4970         next_is_large = server->large_buf;
4971 one_more:
4972         shdr = (struct smb2_hdr *)buf;
4973         next_cmd = le32_to_cpu(shdr->NextCommand);
4974         if (next_cmd) {
4975                 if (WARN_ON_ONCE(next_cmd > pdu_length))
4976                         return -1;
4977                 if (next_is_large)
4978                         next_buffer = (char *)cifs_buf_get();
4979                 else
4980                         next_buffer = (char *)cifs_small_buf_get();
4981                 memcpy(next_buffer, buf + next_cmd, pdu_length - next_cmd);
4982         }
4983
4984         mid_entry = smb2_find_mid(server, buf);
4985         if (mid_entry == NULL)
4986                 cifs_dbg(FYI, "mid not found\n");
4987         else {
4988                 cifs_dbg(FYI, "mid found\n");
4989                 mid_entry->decrypted = true;
4990                 mid_entry->resp_buf_size = server->pdu_size;
4991         }
4992
4993         if (*num_mids >= MAX_COMPOUND) {
4994                 cifs_server_dbg(VFS, "too many PDUs in compound\n");
4995                 return -1;
4996         }
4997         bufs[*num_mids] = buf;
4998         mids[(*num_mids)++] = mid_entry;
4999
5000         if (mid_entry && mid_entry->handle)
5001                 ret = mid_entry->handle(server, mid_entry);
5002         else
5003                 ret = cifs_handle_standard(server, mid_entry);
5004
5005         if (ret == 0 && next_cmd) {
5006                 pdu_length -= next_cmd;
5007                 server->large_buf = next_is_large;
5008                 if (next_is_large)
5009                         server->bigbuf = buf = next_buffer;
5010                 else
5011                         server->smallbuf = buf = next_buffer;
5012                 goto one_more;
5013         } else if (ret != 0) {
5014                 /*
5015                  * ret != 0 here means that we didn't get to handle_mid() thus
5016                  * server->smallbuf and server->bigbuf are still valid. We need
5017                  * to free next_buffer because it is not going to be used
5018                  * anywhere.
5019                  */
5020                 if (next_is_large)
5021                         free_rsp_buf(CIFS_LARGE_BUFFER, next_buffer);
5022                 else
5023                         free_rsp_buf(CIFS_SMALL_BUFFER, next_buffer);
5024         }
5025
5026         return ret;
5027 }
5028
5029 static int
5030 smb3_receive_transform(struct TCP_Server_Info *server,
5031                        struct mid_q_entry **mids, char **bufs, int *num_mids)
5032 {
5033         char *buf = server->smallbuf;
5034         unsigned int pdu_length = server->pdu_size;
5035         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
5036         unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
5037
5038         if (pdu_length < sizeof(struct smb2_transform_hdr) +
5039                                                 sizeof(struct smb2_hdr)) {
5040                 cifs_server_dbg(VFS, "Transform message is too small (%u)\n",
5041                          pdu_length);
5042                 cifs_reconnect(server, true);
5043                 return -ECONNABORTED;
5044         }
5045
5046         if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) {
5047                 cifs_server_dbg(VFS, "Transform message is broken\n");
5048                 cifs_reconnect(server, true);
5049                 return -ECONNABORTED;
5050         }
5051
5052         /* TODO: add support for compounds containing READ. */
5053         if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server)) {
5054                 return receive_encrypted_read(server, &mids[0], num_mids);
5055         }
5056
5057         return receive_encrypted_standard(server, mids, bufs, num_mids);
5058 }
5059
5060 int
5061 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid)
5062 {
5063         char *buf = server->large_buf ? server->bigbuf : server->smallbuf;
5064
5065         return handle_read_data(server, mid, buf, server->pdu_size,
5066                                 NULL, 0, false);
5067 }
5068
5069 static int
5070 smb2_next_header(char *buf)
5071 {
5072         struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
5073         struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf;
5074
5075         if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM)
5076                 return sizeof(struct smb2_transform_hdr) +
5077                   le32_to_cpu(t_hdr->OriginalMessageSize);
5078
5079         return le32_to_cpu(hdr->NextCommand);
5080 }
5081
5082 static int
5083 smb2_make_node(unsigned int xid, struct inode *inode,
5084                struct dentry *dentry, struct cifs_tcon *tcon,
5085                const char *full_path, umode_t mode, dev_t dev)
5086 {
5087         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
5088         int rc = -EPERM;
5089         struct cifs_open_info_data buf = {};
5090         struct cifs_io_parms io_parms = {0};
5091         __u32 oplock = 0;
5092         struct cifs_fid fid;
5093         struct cifs_open_parms oparms;
5094         unsigned int bytes_written;
5095         struct win_dev *pdev;
5096         struct kvec iov[2];
5097
5098         /*
5099          * Check if mounted with mount parm 'sfu' mount parm.
5100          * SFU emulation should work with all servers, but only
5101          * supports block and char device (no socket & fifo),
5102          * and was used by default in earlier versions of Windows
5103          */
5104         if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL))
5105                 return rc;
5106
5107         /*
5108          * TODO: Add ability to create instead via reparse point. Windows (e.g.
5109          * their current NFS server) uses this approach to expose special files
5110          * over SMB2/SMB3 and Samba will do this with SMB3.1.1 POSIX Extensions
5111          */
5112
5113         if (!S_ISCHR(mode) && !S_ISBLK(mode) && !S_ISFIFO(mode))
5114                 return rc;
5115
5116         cifs_dbg(FYI, "sfu compat create special file\n");
5117
5118         oparms = (struct cifs_open_parms) {
5119                 .tcon = tcon,
5120                 .cifs_sb = cifs_sb,
5121                 .desired_access = GENERIC_WRITE,
5122                 .create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR |
5123                                                       CREATE_OPTION_SPECIAL),
5124                 .disposition = FILE_CREATE,
5125                 .path = full_path,
5126                 .fid = &fid,
5127         };
5128
5129         if (tcon->ses->server->oplocks)
5130                 oplock = REQ_OPLOCK;
5131         else
5132                 oplock = 0;
5133         rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, &buf);
5134         if (rc)
5135                 return rc;
5136
5137         /*
5138          * BB Do not bother to decode buf since no local inode yet to put
5139          * timestamps in, but we can reuse it safely.
5140          */
5141
5142         pdev = (struct win_dev *)&buf.fi;
5143         io_parms.pid = current->tgid;
5144         io_parms.tcon = tcon;
5145         io_parms.offset = 0;
5146         io_parms.length = sizeof(struct win_dev);
5147         iov[1].iov_base = &buf.fi;
5148         iov[1].iov_len = sizeof(struct win_dev);
5149         if (S_ISCHR(mode)) {
5150                 memcpy(pdev->type, "IntxCHR", 8);
5151                 pdev->major = cpu_to_le64(MAJOR(dev));
5152                 pdev->minor = cpu_to_le64(MINOR(dev));
5153                 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
5154                                                         &bytes_written, iov, 1);
5155         } else if (S_ISBLK(mode)) {
5156                 memcpy(pdev->type, "IntxBLK", 8);
5157                 pdev->major = cpu_to_le64(MAJOR(dev));
5158                 pdev->minor = cpu_to_le64(MINOR(dev));
5159                 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
5160                                                         &bytes_written, iov, 1);
5161         } else if (S_ISFIFO(mode)) {
5162                 memcpy(pdev->type, "LnxFIFO", 8);
5163                 pdev->major = 0;
5164                 pdev->minor = 0;
5165                 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
5166                                                         &bytes_written, iov, 1);
5167         }
5168         tcon->ses->server->ops->close(xid, tcon, &fid);
5169         d_drop(dentry);
5170
5171         /* FIXME: add code here to set EAs */
5172
5173         cifs_free_open_info(&buf);
5174         return rc;
5175 }
5176
5177 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
5178 struct smb_version_operations smb20_operations = {
5179         .compare_fids = smb2_compare_fids,
5180         .setup_request = smb2_setup_request,
5181         .setup_async_request = smb2_setup_async_request,
5182         .check_receive = smb2_check_receive,
5183         .add_credits = smb2_add_credits,
5184         .set_credits = smb2_set_credits,
5185         .get_credits_field = smb2_get_credits_field,
5186         .get_credits = smb2_get_credits,
5187         .wait_mtu_credits = cifs_wait_mtu_credits,
5188         .get_next_mid = smb2_get_next_mid,
5189         .revert_current_mid = smb2_revert_current_mid,
5190         .read_data_offset = smb2_read_data_offset,
5191         .read_data_length = smb2_read_data_length,
5192         .map_error = map_smb2_to_linux_error,
5193         .find_mid = smb2_find_mid,
5194         .check_message = smb2_check_message,
5195         .dump_detail = smb2_dump_detail,
5196         .clear_stats = smb2_clear_stats,
5197         .print_stats = smb2_print_stats,
5198         .is_oplock_break = smb2_is_valid_oplock_break,
5199         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5200         .downgrade_oplock = smb2_downgrade_oplock,
5201         .need_neg = smb2_need_neg,
5202         .negotiate = smb2_negotiate,
5203         .negotiate_wsize = smb2_negotiate_wsize,
5204         .negotiate_rsize = smb2_negotiate_rsize,
5205         .sess_setup = SMB2_sess_setup,
5206         .logoff = SMB2_logoff,
5207         .tree_connect = SMB2_tcon,
5208         .tree_disconnect = SMB2_tdis,
5209         .qfs_tcon = smb2_qfs_tcon,
5210         .is_path_accessible = smb2_is_path_accessible,
5211         .can_echo = smb2_can_echo,
5212         .echo = SMB2_echo,
5213         .query_path_info = smb2_query_path_info,
5214         .query_reparse_point = smb2_query_reparse_point,
5215         .get_srv_inum = smb2_get_srv_inum,
5216         .query_file_info = smb2_query_file_info,
5217         .set_path_size = smb2_set_path_size,
5218         .set_file_size = smb2_set_file_size,
5219         .set_file_info = smb2_set_file_info,
5220         .set_compression = smb2_set_compression,
5221         .mkdir = smb2_mkdir,
5222         .mkdir_setinfo = smb2_mkdir_setinfo,
5223         .rmdir = smb2_rmdir,
5224         .unlink = smb2_unlink,
5225         .rename = smb2_rename_path,
5226         .create_hardlink = smb2_create_hardlink,
5227         .parse_reparse_point = smb2_parse_reparse_point,
5228         .query_mf_symlink = smb3_query_mf_symlink,
5229         .create_mf_symlink = smb3_create_mf_symlink,
5230         .open = smb2_open_file,
5231         .set_fid = smb2_set_fid,
5232         .close = smb2_close_file,
5233         .flush = smb2_flush_file,
5234         .async_readv = smb2_async_readv,
5235         .async_writev = smb2_async_writev,
5236         .sync_read = smb2_sync_read,
5237         .sync_write = smb2_sync_write,
5238         .query_dir_first = smb2_query_dir_first,
5239         .query_dir_next = smb2_query_dir_next,
5240         .close_dir = smb2_close_dir,
5241         .calc_smb_size = smb2_calc_size,
5242         .is_status_pending = smb2_is_status_pending,
5243         .is_session_expired = smb2_is_session_expired,
5244         .oplock_response = smb2_oplock_response,
5245         .queryfs = smb2_queryfs,
5246         .mand_lock = smb2_mand_lock,
5247         .mand_unlock_range = smb2_unlock_range,
5248         .push_mand_locks = smb2_push_mandatory_locks,
5249         .get_lease_key = smb2_get_lease_key,
5250         .set_lease_key = smb2_set_lease_key,
5251         .new_lease_key = smb2_new_lease_key,
5252         .calc_signature = smb2_calc_signature,
5253         .is_read_op = smb2_is_read_op,
5254         .set_oplock_level = smb2_set_oplock_level,
5255         .create_lease_buf = smb2_create_lease_buf,
5256         .parse_lease_buf = smb2_parse_lease_buf,
5257         .copychunk_range = smb2_copychunk_range,
5258         .wp_retry_size = smb2_wp_retry_size,
5259         .dir_needs_close = smb2_dir_needs_close,
5260         .get_dfs_refer = smb2_get_dfs_refer,
5261         .select_sectype = smb2_select_sectype,
5262 #ifdef CONFIG_CIFS_XATTR
5263         .query_all_EAs = smb2_query_eas,
5264         .set_EA = smb2_set_ea,
5265 #endif /* CIFS_XATTR */
5266         .get_acl = get_smb2_acl,
5267         .get_acl_by_fid = get_smb2_acl_by_fid,
5268         .set_acl = set_smb2_acl,
5269         .next_header = smb2_next_header,
5270         .ioctl_query_info = smb2_ioctl_query_info,
5271         .make_node = smb2_make_node,
5272         .fiemap = smb3_fiemap,
5273         .llseek = smb3_llseek,
5274         .is_status_io_timeout = smb2_is_status_io_timeout,
5275         .is_network_name_deleted = smb2_is_network_name_deleted,
5276 };
5277 #endif /* CIFS_ALLOW_INSECURE_LEGACY */
5278
5279 struct smb_version_operations smb21_operations = {
5280         .compare_fids = smb2_compare_fids,
5281         .setup_request = smb2_setup_request,
5282         .setup_async_request = smb2_setup_async_request,
5283         .check_receive = smb2_check_receive,
5284         .add_credits = smb2_add_credits,
5285         .set_credits = smb2_set_credits,
5286         .get_credits_field = smb2_get_credits_field,
5287         .get_credits = smb2_get_credits,
5288         .wait_mtu_credits = smb2_wait_mtu_credits,
5289         .adjust_credits = smb2_adjust_credits,
5290         .get_next_mid = smb2_get_next_mid,
5291         .revert_current_mid = smb2_revert_current_mid,
5292         .read_data_offset = smb2_read_data_offset,
5293         .read_data_length = smb2_read_data_length,
5294         .map_error = map_smb2_to_linux_error,
5295         .find_mid = smb2_find_mid,
5296         .check_message = smb2_check_message,
5297         .dump_detail = smb2_dump_detail,
5298         .clear_stats = smb2_clear_stats,
5299         .print_stats = smb2_print_stats,
5300         .is_oplock_break = smb2_is_valid_oplock_break,
5301         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5302         .downgrade_oplock = smb2_downgrade_oplock,
5303         .need_neg = smb2_need_neg,
5304         .negotiate = smb2_negotiate,
5305         .negotiate_wsize = smb2_negotiate_wsize,
5306         .negotiate_rsize = smb2_negotiate_rsize,
5307         .sess_setup = SMB2_sess_setup,
5308         .logoff = SMB2_logoff,
5309         .tree_connect = SMB2_tcon,
5310         .tree_disconnect = SMB2_tdis,
5311         .qfs_tcon = smb2_qfs_tcon,
5312         .is_path_accessible = smb2_is_path_accessible,
5313         .can_echo = smb2_can_echo,
5314         .echo = SMB2_echo,
5315         .query_path_info = smb2_query_path_info,
5316         .query_reparse_point = smb2_query_reparse_point,
5317         .get_srv_inum = smb2_get_srv_inum,
5318         .query_file_info = smb2_query_file_info,
5319         .set_path_size = smb2_set_path_size,
5320         .set_file_size = smb2_set_file_size,
5321         .set_file_info = smb2_set_file_info,
5322         .set_compression = smb2_set_compression,
5323         .mkdir = smb2_mkdir,
5324         .mkdir_setinfo = smb2_mkdir_setinfo,
5325         .rmdir = smb2_rmdir,
5326         .unlink = smb2_unlink,
5327         .rename = smb2_rename_path,
5328         .create_hardlink = smb2_create_hardlink,
5329         .parse_reparse_point = smb2_parse_reparse_point,
5330         .query_mf_symlink = smb3_query_mf_symlink,
5331         .create_mf_symlink = smb3_create_mf_symlink,
5332         .open = smb2_open_file,
5333         .set_fid = smb2_set_fid,
5334         .close = smb2_close_file,
5335         .flush = smb2_flush_file,
5336         .async_readv = smb2_async_readv,
5337         .async_writev = smb2_async_writev,
5338         .sync_read = smb2_sync_read,
5339         .sync_write = smb2_sync_write,
5340         .query_dir_first = smb2_query_dir_first,
5341         .query_dir_next = smb2_query_dir_next,
5342         .close_dir = smb2_close_dir,
5343         .calc_smb_size = smb2_calc_size,
5344         .is_status_pending = smb2_is_status_pending,
5345         .is_session_expired = smb2_is_session_expired,
5346         .oplock_response = smb2_oplock_response,
5347         .queryfs = smb2_queryfs,
5348         .mand_lock = smb2_mand_lock,
5349         .mand_unlock_range = smb2_unlock_range,
5350         .push_mand_locks = smb2_push_mandatory_locks,
5351         .get_lease_key = smb2_get_lease_key,
5352         .set_lease_key = smb2_set_lease_key,
5353         .new_lease_key = smb2_new_lease_key,
5354         .calc_signature = smb2_calc_signature,
5355         .is_read_op = smb21_is_read_op,
5356         .set_oplock_level = smb21_set_oplock_level,
5357         .create_lease_buf = smb2_create_lease_buf,
5358         .parse_lease_buf = smb2_parse_lease_buf,
5359         .copychunk_range = smb2_copychunk_range,
5360         .wp_retry_size = smb2_wp_retry_size,
5361         .dir_needs_close = smb2_dir_needs_close,
5362         .enum_snapshots = smb3_enum_snapshots,
5363         .notify = smb3_notify,
5364         .get_dfs_refer = smb2_get_dfs_refer,
5365         .select_sectype = smb2_select_sectype,
5366 #ifdef CONFIG_CIFS_XATTR
5367         .query_all_EAs = smb2_query_eas,
5368         .set_EA = smb2_set_ea,
5369 #endif /* CIFS_XATTR */
5370         .get_acl = get_smb2_acl,
5371         .get_acl_by_fid = get_smb2_acl_by_fid,
5372         .set_acl = set_smb2_acl,
5373         .next_header = smb2_next_header,
5374         .ioctl_query_info = smb2_ioctl_query_info,
5375         .make_node = smb2_make_node,
5376         .fiemap = smb3_fiemap,
5377         .llseek = smb3_llseek,
5378         .is_status_io_timeout = smb2_is_status_io_timeout,
5379         .is_network_name_deleted = smb2_is_network_name_deleted,
5380 };
5381
5382 struct smb_version_operations smb30_operations = {
5383         .compare_fids = smb2_compare_fids,
5384         .setup_request = smb2_setup_request,
5385         .setup_async_request = smb2_setup_async_request,
5386         .check_receive = smb2_check_receive,
5387         .add_credits = smb2_add_credits,
5388         .set_credits = smb2_set_credits,
5389         .get_credits_field = smb2_get_credits_field,
5390         .get_credits = smb2_get_credits,
5391         .wait_mtu_credits = smb2_wait_mtu_credits,
5392         .adjust_credits = smb2_adjust_credits,
5393         .get_next_mid = smb2_get_next_mid,
5394         .revert_current_mid = smb2_revert_current_mid,
5395         .read_data_offset = smb2_read_data_offset,
5396         .read_data_length = smb2_read_data_length,
5397         .map_error = map_smb2_to_linux_error,
5398         .find_mid = smb2_find_mid,
5399         .check_message = smb2_check_message,
5400         .dump_detail = smb2_dump_detail,
5401         .clear_stats = smb2_clear_stats,
5402         .print_stats = smb2_print_stats,
5403         .dump_share_caps = smb2_dump_share_caps,
5404         .is_oplock_break = smb2_is_valid_oplock_break,
5405         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5406         .downgrade_oplock = smb3_downgrade_oplock,
5407         .need_neg = smb2_need_neg,
5408         .negotiate = smb2_negotiate,
5409         .negotiate_wsize = smb3_negotiate_wsize,
5410         .negotiate_rsize = smb3_negotiate_rsize,
5411         .sess_setup = SMB2_sess_setup,
5412         .logoff = SMB2_logoff,
5413         .tree_connect = SMB2_tcon,
5414         .tree_disconnect = SMB2_tdis,
5415         .qfs_tcon = smb3_qfs_tcon,
5416         .is_path_accessible = smb2_is_path_accessible,
5417         .can_echo = smb2_can_echo,
5418         .echo = SMB2_echo,
5419         .query_path_info = smb2_query_path_info,
5420         /* WSL tags introduced long after smb2.1, enable for SMB3, 3.11 only */
5421         .query_reparse_point = smb2_query_reparse_point,
5422         .get_srv_inum = smb2_get_srv_inum,
5423         .query_file_info = smb2_query_file_info,
5424         .set_path_size = smb2_set_path_size,
5425         .set_file_size = smb2_set_file_size,
5426         .set_file_info = smb2_set_file_info,
5427         .set_compression = smb2_set_compression,
5428         .mkdir = smb2_mkdir,
5429         .mkdir_setinfo = smb2_mkdir_setinfo,
5430         .rmdir = smb2_rmdir,
5431         .unlink = smb2_unlink,
5432         .rename = smb2_rename_path,
5433         .create_hardlink = smb2_create_hardlink,
5434         .parse_reparse_point = smb2_parse_reparse_point,
5435         .query_mf_symlink = smb3_query_mf_symlink,
5436         .create_mf_symlink = smb3_create_mf_symlink,
5437         .open = smb2_open_file,
5438         .set_fid = smb2_set_fid,
5439         .close = smb2_close_file,
5440         .close_getattr = smb2_close_getattr,
5441         .flush = smb2_flush_file,
5442         .async_readv = smb2_async_readv,
5443         .async_writev = smb2_async_writev,
5444         .sync_read = smb2_sync_read,
5445         .sync_write = smb2_sync_write,
5446         .query_dir_first = smb2_query_dir_first,
5447         .query_dir_next = smb2_query_dir_next,
5448         .close_dir = smb2_close_dir,
5449         .calc_smb_size = smb2_calc_size,
5450         .is_status_pending = smb2_is_status_pending,
5451         .is_session_expired = smb2_is_session_expired,
5452         .oplock_response = smb2_oplock_response,
5453         .queryfs = smb2_queryfs,
5454         .mand_lock = smb2_mand_lock,
5455         .mand_unlock_range = smb2_unlock_range,
5456         .push_mand_locks = smb2_push_mandatory_locks,
5457         .get_lease_key = smb2_get_lease_key,
5458         .set_lease_key = smb2_set_lease_key,
5459         .new_lease_key = smb2_new_lease_key,
5460         .generate_signingkey = generate_smb30signingkey,
5461         .calc_signature = smb3_calc_signature,
5462         .set_integrity  = smb3_set_integrity,
5463         .is_read_op = smb21_is_read_op,
5464         .set_oplock_level = smb3_set_oplock_level,
5465         .create_lease_buf = smb3_create_lease_buf,
5466         .parse_lease_buf = smb3_parse_lease_buf,
5467         .copychunk_range = smb2_copychunk_range,
5468         .duplicate_extents = smb2_duplicate_extents,
5469         .validate_negotiate = smb3_validate_negotiate,
5470         .wp_retry_size = smb2_wp_retry_size,
5471         .dir_needs_close = smb2_dir_needs_close,
5472         .fallocate = smb3_fallocate,
5473         .enum_snapshots = smb3_enum_snapshots,
5474         .notify = smb3_notify,
5475         .init_transform_rq = smb3_init_transform_rq,
5476         .is_transform_hdr = smb3_is_transform_hdr,
5477         .receive_transform = smb3_receive_transform,
5478         .get_dfs_refer = smb2_get_dfs_refer,
5479         .select_sectype = smb2_select_sectype,
5480 #ifdef CONFIG_CIFS_XATTR
5481         .query_all_EAs = smb2_query_eas,
5482         .set_EA = smb2_set_ea,
5483 #endif /* CIFS_XATTR */
5484         .get_acl = get_smb2_acl,
5485         .get_acl_by_fid = get_smb2_acl_by_fid,
5486         .set_acl = set_smb2_acl,
5487         .next_header = smb2_next_header,
5488         .ioctl_query_info = smb2_ioctl_query_info,
5489         .make_node = smb2_make_node,
5490         .fiemap = smb3_fiemap,
5491         .llseek = smb3_llseek,
5492         .is_status_io_timeout = smb2_is_status_io_timeout,
5493         .is_network_name_deleted = smb2_is_network_name_deleted,
5494 };
5495
5496 struct smb_version_operations smb311_operations = {
5497         .compare_fids = smb2_compare_fids,
5498         .setup_request = smb2_setup_request,
5499         .setup_async_request = smb2_setup_async_request,
5500         .check_receive = smb2_check_receive,
5501         .add_credits = smb2_add_credits,
5502         .set_credits = smb2_set_credits,
5503         .get_credits_field = smb2_get_credits_field,
5504         .get_credits = smb2_get_credits,
5505         .wait_mtu_credits = smb2_wait_mtu_credits,
5506         .adjust_credits = smb2_adjust_credits,
5507         .get_next_mid = smb2_get_next_mid,
5508         .revert_current_mid = smb2_revert_current_mid,
5509         .read_data_offset = smb2_read_data_offset,
5510         .read_data_length = smb2_read_data_length,
5511         .map_error = map_smb2_to_linux_error,
5512         .find_mid = smb2_find_mid,
5513         .check_message = smb2_check_message,
5514         .dump_detail = smb2_dump_detail,
5515         .clear_stats = smb2_clear_stats,
5516         .print_stats = smb2_print_stats,
5517         .dump_share_caps = smb2_dump_share_caps,
5518         .is_oplock_break = smb2_is_valid_oplock_break,
5519         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5520         .downgrade_oplock = smb3_downgrade_oplock,
5521         .need_neg = smb2_need_neg,
5522         .negotiate = smb2_negotiate,
5523         .negotiate_wsize = smb3_negotiate_wsize,
5524         .negotiate_rsize = smb3_negotiate_rsize,
5525         .sess_setup = SMB2_sess_setup,
5526         .logoff = SMB2_logoff,
5527         .tree_connect = SMB2_tcon,
5528         .tree_disconnect = SMB2_tdis,
5529         .qfs_tcon = smb3_qfs_tcon,
5530         .is_path_accessible = smb2_is_path_accessible,
5531         .can_echo = smb2_can_echo,
5532         .echo = SMB2_echo,
5533         .query_path_info = smb2_query_path_info,
5534         .query_reparse_point = smb2_query_reparse_point,
5535         .get_srv_inum = smb2_get_srv_inum,
5536         .query_file_info = smb2_query_file_info,
5537         .set_path_size = smb2_set_path_size,
5538         .set_file_size = smb2_set_file_size,
5539         .set_file_info = smb2_set_file_info,
5540         .set_compression = smb2_set_compression,
5541         .mkdir = smb2_mkdir,
5542         .mkdir_setinfo = smb2_mkdir_setinfo,
5543         .posix_mkdir = smb311_posix_mkdir,
5544         .rmdir = smb2_rmdir,
5545         .unlink = smb2_unlink,
5546         .rename = smb2_rename_path,
5547         .create_hardlink = smb2_create_hardlink,
5548         .parse_reparse_point = smb2_parse_reparse_point,
5549         .query_mf_symlink = smb3_query_mf_symlink,
5550         .create_mf_symlink = smb3_create_mf_symlink,
5551         .open = smb2_open_file,
5552         .set_fid = smb2_set_fid,
5553         .close = smb2_close_file,
5554         .close_getattr = smb2_close_getattr,
5555         .flush = smb2_flush_file,
5556         .async_readv = smb2_async_readv,
5557         .async_writev = smb2_async_writev,
5558         .sync_read = smb2_sync_read,
5559         .sync_write = smb2_sync_write,
5560         .query_dir_first = smb2_query_dir_first,
5561         .query_dir_next = smb2_query_dir_next,
5562         .close_dir = smb2_close_dir,
5563         .calc_smb_size = smb2_calc_size,
5564         .is_status_pending = smb2_is_status_pending,
5565         .is_session_expired = smb2_is_session_expired,
5566         .oplock_response = smb2_oplock_response,
5567         .queryfs = smb311_queryfs,
5568         .mand_lock = smb2_mand_lock,
5569         .mand_unlock_range = smb2_unlock_range,
5570         .push_mand_locks = smb2_push_mandatory_locks,
5571         .get_lease_key = smb2_get_lease_key,
5572         .set_lease_key = smb2_set_lease_key,
5573         .new_lease_key = smb2_new_lease_key,
5574         .generate_signingkey = generate_smb311signingkey,
5575         .calc_signature = smb3_calc_signature,
5576         .set_integrity  = smb3_set_integrity,
5577         .is_read_op = smb21_is_read_op,
5578         .set_oplock_level = smb3_set_oplock_level,
5579         .create_lease_buf = smb3_create_lease_buf,
5580         .parse_lease_buf = smb3_parse_lease_buf,
5581         .copychunk_range = smb2_copychunk_range,
5582         .duplicate_extents = smb2_duplicate_extents,
5583 /*      .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
5584         .wp_retry_size = smb2_wp_retry_size,
5585         .dir_needs_close = smb2_dir_needs_close,
5586         .fallocate = smb3_fallocate,
5587         .enum_snapshots = smb3_enum_snapshots,
5588         .notify = smb3_notify,
5589         .init_transform_rq = smb3_init_transform_rq,
5590         .is_transform_hdr = smb3_is_transform_hdr,
5591         .receive_transform = smb3_receive_transform,
5592         .get_dfs_refer = smb2_get_dfs_refer,
5593         .select_sectype = smb2_select_sectype,
5594 #ifdef CONFIG_CIFS_XATTR
5595         .query_all_EAs = smb2_query_eas,
5596         .set_EA = smb2_set_ea,
5597 #endif /* CIFS_XATTR */
5598         .get_acl = get_smb2_acl,
5599         .get_acl_by_fid = get_smb2_acl_by_fid,
5600         .set_acl = set_smb2_acl,
5601         .next_header = smb2_next_header,
5602         .ioctl_query_info = smb2_ioctl_query_info,
5603         .make_node = smb2_make_node,
5604         .fiemap = smb3_fiemap,
5605         .llseek = smb3_llseek,
5606         .is_status_io_timeout = smb2_is_status_io_timeout,
5607         .is_network_name_deleted = smb2_is_network_name_deleted,
5608 };
5609
5610 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
5611 struct smb_version_values smb20_values = {
5612         .version_string = SMB20_VERSION_STRING,
5613         .protocol_id = SMB20_PROT_ID,
5614         .req_capabilities = 0, /* MBZ */
5615         .large_lock_type = 0,
5616         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5617         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5618         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5619         .header_size = sizeof(struct smb2_hdr),
5620         .header_preamble_size = 0,
5621         .max_header_size = MAX_SMB2_HDR_SIZE,
5622         .read_rsp_size = sizeof(struct smb2_read_rsp),
5623         .lock_cmd = SMB2_LOCK,
5624         .cap_unix = 0,
5625         .cap_nt_find = SMB2_NT_FIND,
5626         .cap_large_files = SMB2_LARGE_FILES,
5627         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5628         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5629         .create_lease_size = sizeof(struct create_lease),
5630 };
5631 #endif /* ALLOW_INSECURE_LEGACY */
5632
5633 struct smb_version_values smb21_values = {
5634         .version_string = SMB21_VERSION_STRING,
5635         .protocol_id = SMB21_PROT_ID,
5636         .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
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),
5652 };
5653
5654 struct smb_version_values smb3any_values = {
5655         .version_string = SMB3ANY_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 smbdefault_values = {
5676         .version_string = SMBDEFAULT_VERSION_STRING,
5677         .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
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 smb30_values = {
5697         .version_string = SMB30_VERSION_STRING,
5698         .protocol_id = SMB30_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 smb302_values = {
5718         .version_string = SMB302_VERSION_STRING,
5719         .protocol_id = SMB302_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 };
5737
5738 struct smb_version_values smb311_values = {
5739         .version_string = SMB311_VERSION_STRING,
5740         .protocol_id = SMB311_PROT_ID,
5741         .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,
5742         .large_lock_type = 0,
5743         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5744         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5745         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5746         .header_size = sizeof(struct smb2_hdr),
5747         .header_preamble_size = 0,
5748         .max_header_size = MAX_SMB2_HDR_SIZE,
5749         .read_rsp_size = sizeof(struct smb2_read_rsp),
5750         .lock_cmd = SMB2_LOCK,
5751         .cap_unix = 0,
5752         .cap_nt_find = SMB2_NT_FIND,
5753         .cap_large_files = SMB2_LARGE_FILES,
5754         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5755         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5756         .create_lease_size = sizeof(struct create_lease_v2),
5757 };