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 static int
2870 parse_reparse_posix(struct reparse_posix_data *symlink_buf,
2871                       u32 plen, char **target_path,
2872                       struct cifs_sb_info *cifs_sb)
2873 {
2874         unsigned int len;
2875
2876         /* See MS-FSCC 2.1.2.6 for the 'NFS' style reparse tags */
2877         len = le16_to_cpu(symlink_buf->ReparseDataLength);
2878
2879         if (le64_to_cpu(symlink_buf->InodeType) != NFS_SPECFILE_LNK) {
2880                 cifs_dbg(VFS, "%lld not a supported symlink type\n",
2881                         le64_to_cpu(symlink_buf->InodeType));
2882                 return -EOPNOTSUPP;
2883         }
2884
2885         *target_path = cifs_strndup_from_utf16(
2886                                 symlink_buf->PathBuffer,
2887                                 len, true, cifs_sb->local_nls);
2888         if (!(*target_path))
2889                 return -ENOMEM;
2890
2891         convert_delimiter(*target_path, '/');
2892         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
2893
2894         return 0;
2895 }
2896
2897 static int parse_reparse_symlink(struct reparse_symlink_data_buffer *sym,
2898                                  u32 plen, bool unicode, char **target_path,
2899                                  struct cifs_sb_info *cifs_sb)
2900 {
2901         unsigned int sub_len;
2902         unsigned int sub_offset;
2903
2904         /* We handle Symbolic Link reparse tag here. See: MS-FSCC 2.1.2.4 */
2905
2906         sub_offset = le16_to_cpu(sym->SubstituteNameOffset);
2907         sub_len = le16_to_cpu(sym->SubstituteNameLength);
2908         if (sub_offset + 20 > plen ||
2909             sub_offset + sub_len + 20 > plen) {
2910                 cifs_dbg(VFS, "srv returned malformed symlink buffer\n");
2911                 return -EIO;
2912         }
2913
2914         *target_path = cifs_strndup_from_utf16(sym->PathBuffer + sub_offset,
2915                                                sub_len, unicode,
2916                                                cifs_sb->local_nls);
2917         if (!(*target_path))
2918                 return -ENOMEM;
2919
2920         convert_delimiter(*target_path, '/');
2921         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
2922
2923         return 0;
2924 }
2925
2926 int parse_reparse_point(struct reparse_data_buffer *buf,
2927                         u32 plen, struct cifs_sb_info *cifs_sb,
2928                         bool unicode, char **target_path)
2929 {
2930         if (plen < sizeof(*buf)) {
2931                 cifs_dbg(VFS, "reparse buffer is too small. Must be at least 8 bytes but was %d\n",
2932                          plen);
2933                 return -EIO;
2934         }
2935
2936         if (plen < le16_to_cpu(buf->ReparseDataLength) + sizeof(*buf)) {
2937                 cifs_dbg(VFS, "srv returned invalid reparse buf length: %d\n",
2938                          plen);
2939                 return -EIO;
2940         }
2941
2942         /* See MS-FSCC 2.1.2 */
2943         switch (le32_to_cpu(buf->ReparseTag)) {
2944         case IO_REPARSE_TAG_NFS:
2945                 return parse_reparse_posix(
2946                         (struct reparse_posix_data *)buf,
2947                         plen, target_path, cifs_sb);
2948         case IO_REPARSE_TAG_SYMLINK:
2949                 return parse_reparse_symlink(
2950                         (struct reparse_symlink_data_buffer *)buf,
2951                         plen, unicode, target_path, cifs_sb);
2952         default:
2953                 cifs_dbg(VFS, "srv returned unknown symlink buffer tag:0x%08x\n",
2954                          le32_to_cpu(buf->ReparseTag));
2955                 return -EOPNOTSUPP;
2956         }
2957 }
2958
2959 static int smb2_query_symlink(const unsigned int xid,
2960                               struct cifs_tcon *tcon,
2961                               struct cifs_sb_info *cifs_sb,
2962                               const char *full_path,
2963                               char **target_path,
2964                               struct kvec *rsp_iov)
2965 {
2966         struct reparse_data_buffer *buf;
2967         struct smb2_ioctl_rsp *io = rsp_iov->iov_base;
2968         u32 plen = le32_to_cpu(io->OutputCount);
2969
2970         cifs_tcon_dbg(FYI, "%s: path: %s\n", __func__, full_path);
2971
2972         buf = (struct reparse_data_buffer *)((u8 *)io +
2973                                              le32_to_cpu(io->OutputOffset));
2974         return parse_reparse_point(buf, plen, cifs_sb, true, target_path);
2975 }
2976
2977 static int smb2_query_reparse_point(const unsigned int xid,
2978                                     struct cifs_tcon *tcon,
2979                                     struct cifs_sb_info *cifs_sb,
2980                                     const char *full_path,
2981                                     u32 *tag, struct kvec *rsp,
2982                                     int *rsp_buftype)
2983 {
2984         struct smb2_compound_vars *vars;
2985         int rc;
2986         __le16 *utf16_path = NULL;
2987         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2988         struct cifs_open_parms oparms;
2989         struct cifs_fid fid;
2990         struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
2991         int flags = CIFS_CP_CREATE_CLOSE_OP;
2992         struct smb_rqst *rqst;
2993         int resp_buftype[3];
2994         struct kvec *rsp_iov;
2995         struct smb2_ioctl_rsp *ioctl_rsp;
2996         struct reparse_data_buffer *reparse_buf;
2997         u32 plen;
2998
2999         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
3000
3001         if (smb3_encryption_required(tcon))
3002                 flags |= CIFS_TRANSFORM_REQ;
3003
3004         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
3005         if (!utf16_path)
3006                 return -ENOMEM;
3007
3008         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
3009         vars = kzalloc(sizeof(*vars), GFP_KERNEL);
3010         if (!vars) {
3011                 rc = -ENOMEM;
3012                 goto out_free_path;
3013         }
3014         rqst = vars->rqst;
3015         rsp_iov = vars->rsp_iov;
3016
3017         /*
3018          * setup smb2open - TODO add optimization to call cifs_get_readable_path
3019          * to see if there is a handle already open that we can use
3020          */
3021         rqst[0].rq_iov = vars->open_iov;
3022         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
3023
3024         oparms = (struct cifs_open_parms) {
3025                 .tcon = tcon,
3026                 .path = full_path,
3027                 .desired_access = FILE_READ_ATTRIBUTES,
3028                 .disposition = FILE_OPEN,
3029                 .create_options = cifs_create_options(cifs_sb, OPEN_REPARSE_POINT),
3030                 .fid = &fid,
3031         };
3032
3033         rc = SMB2_open_init(tcon, server,
3034                             &rqst[0], &oplock, &oparms, utf16_path);
3035         if (rc)
3036                 goto query_rp_exit;
3037         smb2_set_next_command(tcon, &rqst[0]);
3038
3039
3040         /* IOCTL */
3041         rqst[1].rq_iov = vars->io_iov;
3042         rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
3043
3044         rc = SMB2_ioctl_init(tcon, server,
3045                              &rqst[1], COMPOUND_FID,
3046                              COMPOUND_FID, FSCTL_GET_REPARSE_POINT, NULL, 0,
3047                              CIFSMaxBufSize -
3048                              MAX_SMB2_CREATE_RESPONSE_SIZE -
3049                              MAX_SMB2_CLOSE_RESPONSE_SIZE);
3050         if (rc)
3051                 goto query_rp_exit;
3052
3053         smb2_set_next_command(tcon, &rqst[1]);
3054         smb2_set_related(&rqst[1]);
3055
3056         /* Close */
3057         rqst[2].rq_iov = &vars->close_iov;
3058         rqst[2].rq_nvec = 1;
3059
3060         rc = SMB2_close_init(tcon, server,
3061                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
3062         if (rc)
3063                 goto query_rp_exit;
3064
3065         smb2_set_related(&rqst[2]);
3066
3067         rc = compound_send_recv(xid, tcon->ses, server,
3068                                 flags, 3, rqst,
3069                                 resp_buftype, rsp_iov);
3070
3071         ioctl_rsp = rsp_iov[1].iov_base;
3072
3073         /*
3074          * Open was successful and we got an ioctl response.
3075          */
3076         if (rc == 0) {
3077                 /* See MS-FSCC 2.3.23 */
3078
3079                 reparse_buf = (struct reparse_data_buffer *)
3080                         ((char *)ioctl_rsp +
3081                          le32_to_cpu(ioctl_rsp->OutputOffset));
3082                 plen = le32_to_cpu(ioctl_rsp->OutputCount);
3083
3084                 if (plen + le32_to_cpu(ioctl_rsp->OutputOffset) >
3085                     rsp_iov[1].iov_len) {
3086                         cifs_tcon_dbg(FYI, "srv returned invalid ioctl len: %d\n",
3087                                  plen);
3088                         rc = -EIO;
3089                         goto query_rp_exit;
3090                 }
3091                 *tag = le32_to_cpu(reparse_buf->ReparseTag);
3092                 *rsp = rsp_iov[1];
3093                 *rsp_buftype = resp_buftype[1];
3094                 resp_buftype[1] = CIFS_NO_BUFFER;
3095         }
3096
3097  query_rp_exit:
3098         SMB2_open_free(&rqst[0]);
3099         SMB2_ioctl_free(&rqst[1]);
3100         SMB2_close_free(&rqst[2]);
3101         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
3102         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
3103         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
3104         kfree(vars);
3105 out_free_path:
3106         kfree(utf16_path);
3107         return rc;
3108 }
3109
3110 static struct cifs_ntsd *
3111 get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb,
3112                     const struct cifs_fid *cifsfid, u32 *pacllen, u32 info)
3113 {
3114         struct cifs_ntsd *pntsd = NULL;
3115         unsigned int xid;
3116         int rc = -EOPNOTSUPP;
3117         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3118
3119         if (IS_ERR(tlink))
3120                 return ERR_CAST(tlink);
3121
3122         xid = get_xid();
3123         cifs_dbg(FYI, "trying to get acl\n");
3124
3125         rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid,
3126                             cifsfid->volatile_fid, (void **)&pntsd, pacllen,
3127                             info);
3128         free_xid(xid);
3129
3130         cifs_put_tlink(tlink);
3131
3132         cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
3133         if (rc)
3134                 return ERR_PTR(rc);
3135         return pntsd;
3136
3137 }
3138
3139 static struct cifs_ntsd *
3140 get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb,
3141                      const char *path, u32 *pacllen, u32 info)
3142 {
3143         struct cifs_ntsd *pntsd = NULL;
3144         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3145         unsigned int xid;
3146         int rc;
3147         struct cifs_tcon *tcon;
3148         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3149         struct cifs_fid fid;
3150         struct cifs_open_parms oparms;
3151         __le16 *utf16_path;
3152
3153         cifs_dbg(FYI, "get smb3 acl for path %s\n", path);
3154         if (IS_ERR(tlink))
3155                 return ERR_CAST(tlink);
3156
3157         tcon = tlink_tcon(tlink);
3158         xid = get_xid();
3159
3160         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
3161         if (!utf16_path) {
3162                 rc = -ENOMEM;
3163                 free_xid(xid);
3164                 return ERR_PTR(rc);
3165         }
3166
3167         oparms = (struct cifs_open_parms) {
3168                 .tcon = tcon,
3169                 .path = path,
3170                 .desired_access = READ_CONTROL,
3171                 .disposition = FILE_OPEN,
3172                 /*
3173                  * When querying an ACL, even if the file is a symlink
3174                  * we want to open the source not the target, and so
3175                  * the protocol requires that the client specify this
3176                  * flag when opening a reparse point
3177                  */
3178                 .create_options = cifs_create_options(cifs_sb, 0) |
3179                                   OPEN_REPARSE_POINT,
3180                 .fid = &fid,
3181         };
3182
3183         if (info & SACL_SECINFO)
3184                 oparms.desired_access |= SYSTEM_SECURITY;
3185
3186         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
3187                        NULL);
3188         kfree(utf16_path);
3189         if (!rc) {
3190                 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3191                                     fid.volatile_fid, (void **)&pntsd, pacllen,
3192                                     info);
3193                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3194         }
3195
3196         cifs_put_tlink(tlink);
3197         free_xid(xid);
3198
3199         cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
3200         if (rc)
3201                 return ERR_PTR(rc);
3202         return pntsd;
3203 }
3204
3205 static int
3206 set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
3207                 struct inode *inode, const char *path, int aclflag)
3208 {
3209         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3210         unsigned int xid;
3211         int rc, access_flags = 0;
3212         struct cifs_tcon *tcon;
3213         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
3214         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3215         struct cifs_fid fid;
3216         struct cifs_open_parms oparms;
3217         __le16 *utf16_path;
3218
3219         cifs_dbg(FYI, "set smb3 acl for path %s\n", path);
3220         if (IS_ERR(tlink))
3221                 return PTR_ERR(tlink);
3222
3223         tcon = tlink_tcon(tlink);
3224         xid = get_xid();
3225
3226         if (aclflag & CIFS_ACL_OWNER || aclflag & CIFS_ACL_GROUP)
3227                 access_flags |= WRITE_OWNER;
3228         if (aclflag & CIFS_ACL_SACL)
3229                 access_flags |= SYSTEM_SECURITY;
3230         if (aclflag & CIFS_ACL_DACL)
3231                 access_flags |= WRITE_DAC;
3232
3233         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
3234         if (!utf16_path) {
3235                 rc = -ENOMEM;
3236                 free_xid(xid);
3237                 return rc;
3238         }
3239
3240         oparms = (struct cifs_open_parms) {
3241                 .tcon = tcon,
3242                 .desired_access = access_flags,
3243                 .create_options = cifs_create_options(cifs_sb, 0),
3244                 .disposition = FILE_OPEN,
3245                 .path = path,
3246                 .fid = &fid,
3247         };
3248
3249         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL,
3250                        NULL, NULL);
3251         kfree(utf16_path);
3252         if (!rc) {
3253                 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3254                             fid.volatile_fid, pnntsd, acllen, aclflag);
3255                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3256         }
3257
3258         cifs_put_tlink(tlink);
3259         free_xid(xid);
3260         return rc;
3261 }
3262
3263 /* Retrieve an ACL from the server */
3264 static struct cifs_ntsd *
3265 get_smb2_acl(struct cifs_sb_info *cifs_sb,
3266              struct inode *inode, const char *path,
3267              u32 *pacllen, u32 info)
3268 {
3269         struct cifs_ntsd *pntsd = NULL;
3270         struct cifsFileInfo *open_file = NULL;
3271
3272         if (inode && !(info & SACL_SECINFO))
3273                 open_file = find_readable_file(CIFS_I(inode), true);
3274         if (!open_file || (info & SACL_SECINFO))
3275                 return get_smb2_acl_by_path(cifs_sb, path, pacllen, info);
3276
3277         pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen, info);
3278         cifsFileInfo_put(open_file);
3279         return pntsd;
3280 }
3281
3282 static long smb3_zero_data(struct file *file, struct cifs_tcon *tcon,
3283                              loff_t offset, loff_t len, unsigned int xid)
3284 {
3285         struct cifsFileInfo *cfile = file->private_data;
3286         struct file_zero_data_information fsctl_buf;
3287
3288         cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3289
3290         fsctl_buf.FileOffset = cpu_to_le64(offset);
3291         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3292
3293         return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3294                           cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
3295                           (char *)&fsctl_buf,
3296                           sizeof(struct file_zero_data_information),
3297                           0, NULL, NULL);
3298 }
3299
3300 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
3301                             loff_t offset, loff_t len, bool keep_size)
3302 {
3303         struct cifs_ses *ses = tcon->ses;
3304         struct inode *inode = file_inode(file);
3305         struct cifsInodeInfo *cifsi = CIFS_I(inode);
3306         struct cifsFileInfo *cfile = file->private_data;
3307         unsigned long long new_size;
3308         long rc;
3309         unsigned int xid;
3310         __le64 eof;
3311
3312         xid = get_xid();
3313
3314         trace_smb3_zero_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3315                               ses->Suid, offset, len);
3316
3317         inode_lock(inode);
3318         filemap_invalidate_lock(inode->i_mapping);
3319
3320         /*
3321          * We zero the range through ioctl, so we need remove the page caches
3322          * first, otherwise the data may be inconsistent with the server.
3323          */
3324         truncate_pagecache_range(inode, offset, offset + len - 1);
3325
3326         /* if file not oplocked can't be sure whether asking to extend size */
3327         rc = -EOPNOTSUPP;
3328         if (keep_size == false && !CIFS_CACHE_READ(cifsi))
3329                 goto zero_range_exit;
3330
3331         rc = smb3_zero_data(file, tcon, offset, len, xid);
3332         if (rc < 0)
3333                 goto zero_range_exit;
3334
3335         /*
3336          * do we also need to change the size of the file?
3337          */
3338         new_size = offset + len;
3339         if (keep_size == false && (unsigned long long)i_size_read(inode) < new_size) {
3340                 eof = cpu_to_le64(new_size);
3341                 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3342                                   cfile->fid.volatile_fid, cfile->pid, &eof);
3343                 if (rc >= 0) {
3344                         truncate_setsize(inode, new_size);
3345                         fscache_resize_cookie(cifs_inode_cookie(inode), new_size);
3346                 }
3347         }
3348
3349  zero_range_exit:
3350         filemap_invalidate_unlock(inode->i_mapping);
3351         inode_unlock(inode);
3352         free_xid(xid);
3353         if (rc)
3354                 trace_smb3_zero_err(xid, cfile->fid.persistent_fid, tcon->tid,
3355                               ses->Suid, offset, len, rc);
3356         else
3357                 trace_smb3_zero_done(xid, cfile->fid.persistent_fid, tcon->tid,
3358                               ses->Suid, offset, len);
3359         return rc;
3360 }
3361
3362 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
3363                             loff_t offset, loff_t len)
3364 {
3365         struct inode *inode = file_inode(file);
3366         struct cifsFileInfo *cfile = file->private_data;
3367         struct file_zero_data_information fsctl_buf;
3368         long rc;
3369         unsigned int xid;
3370         __u8 set_sparse = 1;
3371
3372         xid = get_xid();
3373
3374         inode_lock(inode);
3375         /* Need to make file sparse, if not already, before freeing range. */
3376         /* Consider adding equivalent for compressed since it could also work */
3377         if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) {
3378                 rc = -EOPNOTSUPP;
3379                 goto out;
3380         }
3381
3382         filemap_invalidate_lock(inode->i_mapping);
3383         /*
3384          * We implement the punch hole through ioctl, so we need remove the page
3385          * caches first, otherwise the data may be inconsistent with the server.
3386          */
3387         truncate_pagecache_range(inode, offset, offset + len - 1);
3388
3389         cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3390
3391         fsctl_buf.FileOffset = cpu_to_le64(offset);
3392         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3393
3394         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3395                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
3396                         (char *)&fsctl_buf,
3397                         sizeof(struct file_zero_data_information),
3398                         CIFSMaxBufSize, NULL, NULL);
3399         filemap_invalidate_unlock(inode->i_mapping);
3400 out:
3401         inode_unlock(inode);
3402         free_xid(xid);
3403         return rc;
3404 }
3405
3406 static int smb3_simple_fallocate_write_range(unsigned int xid,
3407                                              struct cifs_tcon *tcon,
3408                                              struct cifsFileInfo *cfile,
3409                                              loff_t off, loff_t len,
3410                                              char *buf)
3411 {
3412         struct cifs_io_parms io_parms = {0};
3413         int nbytes;
3414         int rc = 0;
3415         struct kvec iov[2];
3416
3417         io_parms.netfid = cfile->fid.netfid;
3418         io_parms.pid = current->tgid;
3419         io_parms.tcon = tcon;
3420         io_parms.persistent_fid = cfile->fid.persistent_fid;
3421         io_parms.volatile_fid = cfile->fid.volatile_fid;
3422
3423         while (len) {
3424                 io_parms.offset = off;
3425                 io_parms.length = len;
3426                 if (io_parms.length > SMB2_MAX_BUFFER_SIZE)
3427                         io_parms.length = SMB2_MAX_BUFFER_SIZE;
3428                 /* iov[0] is reserved for smb header */
3429                 iov[1].iov_base = buf;
3430                 iov[1].iov_len = io_parms.length;
3431                 rc = SMB2_write(xid, &io_parms, &nbytes, iov, 1);
3432                 if (rc)
3433                         break;
3434                 if (nbytes > len)
3435                         return -EINVAL;
3436                 buf += nbytes;
3437                 off += nbytes;
3438                 len -= nbytes;
3439         }
3440         return rc;
3441 }
3442
3443 static int smb3_simple_fallocate_range(unsigned int xid,
3444                                        struct cifs_tcon *tcon,
3445                                        struct cifsFileInfo *cfile,
3446                                        loff_t off, loff_t len)
3447 {
3448         struct file_allocated_range_buffer in_data, *out_data = NULL, *tmp_data;
3449         u32 out_data_len;
3450         char *buf = NULL;
3451         loff_t l;
3452         int rc;
3453
3454         in_data.file_offset = cpu_to_le64(off);
3455         in_data.length = cpu_to_le64(len);
3456         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3457                         cfile->fid.volatile_fid,
3458                         FSCTL_QUERY_ALLOCATED_RANGES,
3459                         (char *)&in_data, sizeof(in_data),
3460                         1024 * sizeof(struct file_allocated_range_buffer),
3461                         (char **)&out_data, &out_data_len);
3462         if (rc)
3463                 goto out;
3464
3465         buf = kzalloc(1024 * 1024, GFP_KERNEL);
3466         if (buf == NULL) {
3467                 rc = -ENOMEM;
3468                 goto out;
3469         }
3470
3471         tmp_data = out_data;
3472         while (len) {
3473                 /*
3474                  * The rest of the region is unmapped so write it all.
3475                  */
3476                 if (out_data_len == 0) {
3477                         rc = smb3_simple_fallocate_write_range(xid, tcon,
3478                                                cfile, off, len, buf);
3479                         goto out;
3480                 }
3481
3482                 if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3483                         rc = -EINVAL;
3484                         goto out;
3485                 }
3486
3487                 if (off < le64_to_cpu(tmp_data->file_offset)) {
3488                         /*
3489                          * We are at a hole. Write until the end of the region
3490                          * or until the next allocated data,
3491                          * whichever comes next.
3492                          */
3493                         l = le64_to_cpu(tmp_data->file_offset) - off;
3494                         if (len < l)
3495                                 l = len;
3496                         rc = smb3_simple_fallocate_write_range(xid, tcon,
3497                                                cfile, off, l, buf);
3498                         if (rc)
3499                                 goto out;
3500                         off = off + l;
3501                         len = len - l;
3502                         if (len == 0)
3503                                 goto out;
3504                 }
3505                 /*
3506                  * We are at a section of allocated data, just skip forward
3507                  * until the end of the data or the end of the region
3508                  * we are supposed to fallocate, whichever comes first.
3509                  */
3510                 l = le64_to_cpu(tmp_data->length);
3511                 if (len < l)
3512                         l = len;
3513                 off += l;
3514                 len -= l;
3515
3516                 tmp_data = &tmp_data[1];
3517                 out_data_len -= sizeof(struct file_allocated_range_buffer);
3518         }
3519
3520  out:
3521         kfree(out_data);
3522         kfree(buf);
3523         return rc;
3524 }
3525
3526
3527 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
3528                             loff_t off, loff_t len, bool keep_size)
3529 {
3530         struct inode *inode;
3531         struct cifsInodeInfo *cifsi;
3532         struct cifsFileInfo *cfile = file->private_data;
3533         long rc = -EOPNOTSUPP;
3534         unsigned int xid;
3535         __le64 eof;
3536
3537         xid = get_xid();
3538
3539         inode = d_inode(cfile->dentry);
3540         cifsi = CIFS_I(inode);
3541
3542         trace_smb3_falloc_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3543                                 tcon->ses->Suid, off, len);
3544         /* if file not oplocked can't be sure whether asking to extend size */
3545         if (!CIFS_CACHE_READ(cifsi))
3546                 if (keep_size == false) {
3547                         trace_smb3_falloc_err(xid, cfile->fid.persistent_fid,
3548                                 tcon->tid, tcon->ses->Suid, off, len, rc);
3549                         free_xid(xid);
3550                         return rc;
3551                 }
3552
3553         /*
3554          * Extending the file
3555          */
3556         if ((keep_size == false) && i_size_read(inode) < off + len) {
3557                 rc = inode_newsize_ok(inode, off + len);
3558                 if (rc)
3559                         goto out;
3560
3561                 if (cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)
3562                         smb2_set_sparse(xid, tcon, cfile, inode, false);
3563
3564                 eof = cpu_to_le64(off + len);
3565                 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3566                                   cfile->fid.volatile_fid, cfile->pid, &eof);
3567                 if (rc == 0) {
3568                         cifsi->server_eof = off + len;
3569                         cifs_setsize(inode, off + len);
3570                         cifs_truncate_page(inode->i_mapping, inode->i_size);
3571                         truncate_setsize(inode, off + len);
3572                 }
3573                 goto out;
3574         }
3575
3576         /*
3577          * Files are non-sparse by default so falloc may be a no-op
3578          * Must check if file sparse. If not sparse, and since we are not
3579          * extending then no need to do anything since file already allocated
3580          */
3581         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
3582                 rc = 0;
3583                 goto out;
3584         }
3585
3586         if (keep_size == true) {
3587                 /*
3588                  * We can not preallocate pages beyond the end of the file
3589                  * in SMB2
3590                  */
3591                 if (off >= i_size_read(inode)) {
3592                         rc = 0;
3593                         goto out;
3594                 }
3595                 /*
3596                  * For fallocates that are partially beyond the end of file,
3597                  * clamp len so we only fallocate up to the end of file.
3598                  */
3599                 if (off + len > i_size_read(inode)) {
3600                         len = i_size_read(inode) - off;
3601                 }
3602         }
3603
3604         if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
3605                 /*
3606                  * At this point, we are trying to fallocate an internal
3607                  * regions of a sparse file. Since smb2 does not have a
3608                  * fallocate command we have two otions on how to emulate this.
3609                  * We can either turn the entire file to become non-sparse
3610                  * which we only do if the fallocate is for virtually
3611                  * the whole file,  or we can overwrite the region with zeroes
3612                  * using SMB2_write, which could be prohibitevly expensive
3613                  * if len is large.
3614                  */
3615                 /*
3616                  * We are only trying to fallocate a small region so
3617                  * just write it with zero.
3618                  */
3619                 if (len <= 1024 * 1024) {
3620                         rc = smb3_simple_fallocate_range(xid, tcon, cfile,
3621                                                          off, len);
3622                         goto out;
3623                 }
3624
3625                 /*
3626                  * Check if falloc starts within first few pages of file
3627                  * and ends within a few pages of the end of file to
3628                  * ensure that most of file is being forced to be
3629                  * fallocated now. If so then setting whole file sparse
3630                  * ie potentially making a few extra pages at the beginning
3631                  * or end of the file non-sparse via set_sparse is harmless.
3632                  */
3633                 if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) {
3634                         rc = -EOPNOTSUPP;
3635                         goto out;
3636                 }
3637         }
3638
3639         smb2_set_sparse(xid, tcon, cfile, inode, false);
3640         rc = 0;
3641
3642 out:
3643         if (rc)
3644                 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid,
3645                                 tcon->ses->Suid, off, len, rc);
3646         else
3647                 trace_smb3_falloc_done(xid, cfile->fid.persistent_fid, tcon->tid,
3648                                 tcon->ses->Suid, off, len);
3649
3650         free_xid(xid);
3651         return rc;
3652 }
3653
3654 static long smb3_collapse_range(struct file *file, struct cifs_tcon *tcon,
3655                             loff_t off, loff_t len)
3656 {
3657         int rc;
3658         unsigned int xid;
3659         struct inode *inode = file_inode(file);
3660         struct cifsFileInfo *cfile = file->private_data;
3661         struct cifsInodeInfo *cifsi = CIFS_I(inode);
3662         __le64 eof;
3663         loff_t old_eof;
3664
3665         xid = get_xid();
3666
3667         inode_lock(inode);
3668
3669         old_eof = i_size_read(inode);
3670         if ((off >= old_eof) ||
3671             off + len >= old_eof) {
3672                 rc = -EINVAL;
3673                 goto out;
3674         }
3675
3676         filemap_invalidate_lock(inode->i_mapping);
3677         rc = filemap_write_and_wait_range(inode->i_mapping, off, old_eof - 1);
3678         if (rc < 0)
3679                 goto out_2;
3680
3681         truncate_pagecache_range(inode, off, old_eof);
3682
3683         rc = smb2_copychunk_range(xid, cfile, cfile, off + len,
3684                                   old_eof - off - len, off);
3685         if (rc < 0)
3686                 goto out_2;
3687
3688         eof = cpu_to_le64(old_eof - len);
3689         rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3690                           cfile->fid.volatile_fid, cfile->pid, &eof);
3691         if (rc < 0)
3692                 goto out_2;
3693
3694         rc = 0;
3695
3696         cifsi->server_eof = i_size_read(inode) - len;
3697         truncate_setsize(inode, cifsi->server_eof);
3698         fscache_resize_cookie(cifs_inode_cookie(inode), cifsi->server_eof);
3699 out_2:
3700         filemap_invalidate_unlock(inode->i_mapping);
3701  out:
3702         inode_unlock(inode);
3703         free_xid(xid);
3704         return rc;
3705 }
3706
3707 static long smb3_insert_range(struct file *file, struct cifs_tcon *tcon,
3708                               loff_t off, loff_t len)
3709 {
3710         int rc;
3711         unsigned int xid;
3712         struct cifsFileInfo *cfile = file->private_data;
3713         struct inode *inode = file_inode(file);
3714         __le64 eof;
3715         __u64  count, old_eof;
3716
3717         xid = get_xid();
3718
3719         inode_lock(inode);
3720
3721         old_eof = i_size_read(inode);
3722         if (off >= old_eof) {
3723                 rc = -EINVAL;
3724                 goto out;
3725         }
3726
3727         count = old_eof - off;
3728         eof = cpu_to_le64(old_eof + len);
3729
3730         filemap_invalidate_lock(inode->i_mapping);
3731         rc = filemap_write_and_wait_range(inode->i_mapping, off, old_eof + len - 1);
3732         if (rc < 0)
3733                 goto out_2;
3734         truncate_pagecache_range(inode, off, old_eof);
3735
3736         rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3737                           cfile->fid.volatile_fid, cfile->pid, &eof);
3738         if (rc < 0)
3739                 goto out_2;
3740
3741         truncate_setsize(inode, old_eof + len);
3742         fscache_resize_cookie(cifs_inode_cookie(inode), i_size_read(inode));
3743
3744         rc = smb2_copychunk_range(xid, cfile, cfile, off, count, off + len);
3745         if (rc < 0)
3746                 goto out_2;
3747
3748         rc = smb3_zero_data(file, tcon, off, len, xid);
3749         if (rc < 0)
3750                 goto out_2;
3751
3752         rc = 0;
3753 out_2:
3754         filemap_invalidate_unlock(inode->i_mapping);
3755  out:
3756         inode_unlock(inode);
3757         free_xid(xid);
3758         return rc;
3759 }
3760
3761 static loff_t smb3_llseek(struct file *file, struct cifs_tcon *tcon, loff_t offset, int whence)
3762 {
3763         struct cifsFileInfo *wrcfile, *cfile = file->private_data;
3764         struct cifsInodeInfo *cifsi;
3765         struct inode *inode;
3766         int rc = 0;
3767         struct file_allocated_range_buffer in_data, *out_data = NULL;
3768         u32 out_data_len;
3769         unsigned int xid;
3770
3771         if (whence != SEEK_HOLE && whence != SEEK_DATA)
3772                 return generic_file_llseek(file, offset, whence);
3773
3774         inode = d_inode(cfile->dentry);
3775         cifsi = CIFS_I(inode);
3776
3777         if (offset < 0 || offset >= i_size_read(inode))
3778                 return -ENXIO;
3779
3780         xid = get_xid();
3781         /*
3782          * We need to be sure that all dirty pages are written as they
3783          * might fill holes on the server.
3784          * Note that we also MUST flush any written pages since at least
3785          * some servers (Windows2016) will not reflect recent writes in
3786          * QUERY_ALLOCATED_RANGES until SMB2_flush is called.
3787          */
3788         wrcfile = find_writable_file(cifsi, FIND_WR_ANY);
3789         if (wrcfile) {
3790                 filemap_write_and_wait(inode->i_mapping);
3791                 smb2_flush_file(xid, tcon, &wrcfile->fid);
3792                 cifsFileInfo_put(wrcfile);
3793         }
3794
3795         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) {
3796                 if (whence == SEEK_HOLE)
3797                         offset = i_size_read(inode);
3798                 goto lseek_exit;
3799         }
3800
3801         in_data.file_offset = cpu_to_le64(offset);
3802         in_data.length = cpu_to_le64(i_size_read(inode));
3803
3804         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3805                         cfile->fid.volatile_fid,
3806                         FSCTL_QUERY_ALLOCATED_RANGES,
3807                         (char *)&in_data, sizeof(in_data),
3808                         sizeof(struct file_allocated_range_buffer),
3809                         (char **)&out_data, &out_data_len);
3810         if (rc == -E2BIG)
3811                 rc = 0;
3812         if (rc)
3813                 goto lseek_exit;
3814
3815         if (whence == SEEK_HOLE && out_data_len == 0)
3816                 goto lseek_exit;
3817
3818         if (whence == SEEK_DATA && out_data_len == 0) {
3819                 rc = -ENXIO;
3820                 goto lseek_exit;
3821         }
3822
3823         if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3824                 rc = -EINVAL;
3825                 goto lseek_exit;
3826         }
3827         if (whence == SEEK_DATA) {
3828                 offset = le64_to_cpu(out_data->file_offset);
3829                 goto lseek_exit;
3830         }
3831         if (offset < le64_to_cpu(out_data->file_offset))
3832                 goto lseek_exit;
3833
3834         offset = le64_to_cpu(out_data->file_offset) + le64_to_cpu(out_data->length);
3835
3836  lseek_exit:
3837         free_xid(xid);
3838         kfree(out_data);
3839         if (!rc)
3840                 return vfs_setpos(file, offset, inode->i_sb->s_maxbytes);
3841         else
3842                 return rc;
3843 }
3844
3845 static int smb3_fiemap(struct cifs_tcon *tcon,
3846                        struct cifsFileInfo *cfile,
3847                        struct fiemap_extent_info *fei, u64 start, u64 len)
3848 {
3849         unsigned int xid;
3850         struct file_allocated_range_buffer in_data, *out_data;
3851         u32 out_data_len;
3852         int i, num, rc, flags, last_blob;
3853         u64 next;
3854
3855         rc = fiemap_prep(d_inode(cfile->dentry), fei, start, &len, 0);
3856         if (rc)
3857                 return rc;
3858
3859         xid = get_xid();
3860  again:
3861         in_data.file_offset = cpu_to_le64(start);
3862         in_data.length = cpu_to_le64(len);
3863
3864         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3865                         cfile->fid.volatile_fid,
3866                         FSCTL_QUERY_ALLOCATED_RANGES,
3867                         (char *)&in_data, sizeof(in_data),
3868                         1024 * sizeof(struct file_allocated_range_buffer),
3869                         (char **)&out_data, &out_data_len);
3870         if (rc == -E2BIG) {
3871                 last_blob = 0;
3872                 rc = 0;
3873         } else
3874                 last_blob = 1;
3875         if (rc)
3876                 goto out;
3877
3878         if (out_data_len && out_data_len < sizeof(struct file_allocated_range_buffer)) {
3879                 rc = -EINVAL;
3880                 goto out;
3881         }
3882         if (out_data_len % sizeof(struct file_allocated_range_buffer)) {
3883                 rc = -EINVAL;
3884                 goto out;
3885         }
3886
3887         num = out_data_len / sizeof(struct file_allocated_range_buffer);
3888         for (i = 0; i < num; i++) {
3889                 flags = 0;
3890                 if (i == num - 1 && last_blob)
3891                         flags |= FIEMAP_EXTENT_LAST;
3892
3893                 rc = fiemap_fill_next_extent(fei,
3894                                 le64_to_cpu(out_data[i].file_offset),
3895                                 le64_to_cpu(out_data[i].file_offset),
3896                                 le64_to_cpu(out_data[i].length),
3897                                 flags);
3898                 if (rc < 0)
3899                         goto out;
3900                 if (rc == 1) {
3901                         rc = 0;
3902                         goto out;
3903                 }
3904         }
3905
3906         if (!last_blob) {
3907                 next = le64_to_cpu(out_data[num - 1].file_offset) +
3908                   le64_to_cpu(out_data[num - 1].length);
3909                 len = len - (next - start);
3910                 start = next;
3911                 goto again;
3912         }
3913
3914  out:
3915         free_xid(xid);
3916         kfree(out_data);
3917         return rc;
3918 }
3919
3920 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
3921                            loff_t off, loff_t len)
3922 {
3923         /* KEEP_SIZE already checked for by do_fallocate */
3924         if (mode & FALLOC_FL_PUNCH_HOLE)
3925                 return smb3_punch_hole(file, tcon, off, len);
3926         else if (mode & FALLOC_FL_ZERO_RANGE) {
3927                 if (mode & FALLOC_FL_KEEP_SIZE)
3928                         return smb3_zero_range(file, tcon, off, len, true);
3929                 return smb3_zero_range(file, tcon, off, len, false);
3930         } else if (mode == FALLOC_FL_KEEP_SIZE)
3931                 return smb3_simple_falloc(file, tcon, off, len, true);
3932         else if (mode == FALLOC_FL_COLLAPSE_RANGE)
3933                 return smb3_collapse_range(file, tcon, off, len);
3934         else if (mode == FALLOC_FL_INSERT_RANGE)
3935                 return smb3_insert_range(file, tcon, off, len);
3936         else if (mode == 0)
3937                 return smb3_simple_falloc(file, tcon, off, len, false);
3938
3939         return -EOPNOTSUPP;
3940 }
3941
3942 static void
3943 smb2_downgrade_oplock(struct TCP_Server_Info *server,
3944                       struct cifsInodeInfo *cinode, __u32 oplock,
3945                       unsigned int epoch, bool *purge_cache)
3946 {
3947         server->ops->set_oplock_level(cinode, oplock, 0, NULL);
3948 }
3949
3950 static void
3951 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3952                        unsigned int epoch, bool *purge_cache);
3953
3954 static void
3955 smb3_downgrade_oplock(struct TCP_Server_Info *server,
3956                        struct cifsInodeInfo *cinode, __u32 oplock,
3957                        unsigned int epoch, bool *purge_cache)
3958 {
3959         unsigned int old_state = cinode->oplock;
3960         unsigned int old_epoch = cinode->epoch;
3961         unsigned int new_state;
3962
3963         if (epoch > old_epoch) {
3964                 smb21_set_oplock_level(cinode, oplock, 0, NULL);
3965                 cinode->epoch = epoch;
3966         }
3967
3968         new_state = cinode->oplock;
3969         *purge_cache = false;
3970
3971         if ((old_state & CIFS_CACHE_READ_FLG) != 0 &&
3972             (new_state & CIFS_CACHE_READ_FLG) == 0)
3973                 *purge_cache = true;
3974         else if (old_state == new_state && (epoch - old_epoch > 1))
3975                 *purge_cache = true;
3976 }
3977
3978 static void
3979 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3980                       unsigned int epoch, bool *purge_cache)
3981 {
3982         oplock &= 0xFF;
3983         cinode->lease_granted = false;
3984         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
3985                 return;
3986         if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
3987                 cinode->oplock = CIFS_CACHE_RHW_FLG;
3988                 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
3989                          &cinode->netfs.inode);
3990         } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
3991                 cinode->oplock = CIFS_CACHE_RW_FLG;
3992                 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
3993                          &cinode->netfs.inode);
3994         } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
3995                 cinode->oplock = CIFS_CACHE_READ_FLG;
3996                 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
3997                          &cinode->netfs.inode);
3998         } else
3999                 cinode->oplock = 0;
4000 }
4001
4002 static void
4003 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
4004                        unsigned int epoch, bool *purge_cache)
4005 {
4006         char message[5] = {0};
4007         unsigned int new_oplock = 0;
4008
4009         oplock &= 0xFF;
4010         cinode->lease_granted = true;
4011         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
4012                 return;
4013
4014         /* Check if the server granted an oplock rather than a lease */
4015         if (oplock & SMB2_OPLOCK_LEVEL_EXCLUSIVE)
4016                 return smb2_set_oplock_level(cinode, oplock, epoch,
4017                                              purge_cache);
4018
4019         if (oplock & SMB2_LEASE_READ_CACHING_HE) {
4020                 new_oplock |= CIFS_CACHE_READ_FLG;
4021                 strcat(message, "R");
4022         }
4023         if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
4024                 new_oplock |= CIFS_CACHE_HANDLE_FLG;
4025                 strcat(message, "H");
4026         }
4027         if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
4028                 new_oplock |= CIFS_CACHE_WRITE_FLG;
4029                 strcat(message, "W");
4030         }
4031         if (!new_oplock)
4032                 strncpy(message, "None", sizeof(message));
4033
4034         cinode->oplock = new_oplock;
4035         cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
4036                  &cinode->netfs.inode);
4037 }
4038
4039 static void
4040 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
4041                       unsigned int epoch, bool *purge_cache)
4042 {
4043         unsigned int old_oplock = cinode->oplock;
4044
4045         smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
4046
4047         if (purge_cache) {
4048                 *purge_cache = false;
4049                 if (old_oplock == CIFS_CACHE_READ_FLG) {
4050                         if (cinode->oplock == CIFS_CACHE_READ_FLG &&
4051                             (epoch - cinode->epoch > 0))
4052                                 *purge_cache = true;
4053                         else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
4054                                  (epoch - cinode->epoch > 1))
4055                                 *purge_cache = true;
4056                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
4057                                  (epoch - cinode->epoch > 1))
4058                                 *purge_cache = true;
4059                         else if (cinode->oplock == 0 &&
4060                                  (epoch - cinode->epoch > 0))
4061                                 *purge_cache = true;
4062                 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
4063                         if (cinode->oplock == CIFS_CACHE_RH_FLG &&
4064                             (epoch - cinode->epoch > 0))
4065                                 *purge_cache = true;
4066                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
4067                                  (epoch - cinode->epoch > 1))
4068                                 *purge_cache = true;
4069                 }
4070                 cinode->epoch = epoch;
4071         }
4072 }
4073
4074 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
4075 static bool
4076 smb2_is_read_op(__u32 oplock)
4077 {
4078         return oplock == SMB2_OPLOCK_LEVEL_II;
4079 }
4080 #endif /* CIFS_ALLOW_INSECURE_LEGACY */
4081
4082 static bool
4083 smb21_is_read_op(__u32 oplock)
4084 {
4085         return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
4086                !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
4087 }
4088
4089 static __le32
4090 map_oplock_to_lease(u8 oplock)
4091 {
4092         if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
4093                 return SMB2_LEASE_WRITE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE;
4094         else if (oplock == SMB2_OPLOCK_LEVEL_II)
4095                 return SMB2_LEASE_READ_CACHING_LE;
4096         else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
4097                 return SMB2_LEASE_HANDLE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE |
4098                        SMB2_LEASE_WRITE_CACHING_LE;
4099         return 0;
4100 }
4101
4102 static char *
4103 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
4104 {
4105         struct create_lease *buf;
4106
4107         buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
4108         if (!buf)
4109                 return NULL;
4110
4111         memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
4112         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
4113
4114         buf->ccontext.DataOffset = cpu_to_le16(offsetof
4115                                         (struct create_lease, lcontext));
4116         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
4117         buf->ccontext.NameOffset = cpu_to_le16(offsetof
4118                                 (struct create_lease, Name));
4119         buf->ccontext.NameLength = cpu_to_le16(4);
4120         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
4121         buf->Name[0] = 'R';
4122         buf->Name[1] = 'q';
4123         buf->Name[2] = 'L';
4124         buf->Name[3] = 's';
4125         return (char *)buf;
4126 }
4127
4128 static char *
4129 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
4130 {
4131         struct create_lease_v2 *buf;
4132
4133         buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
4134         if (!buf)
4135                 return NULL;
4136
4137         memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
4138         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
4139
4140         buf->ccontext.DataOffset = cpu_to_le16(offsetof
4141                                         (struct create_lease_v2, lcontext));
4142         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
4143         buf->ccontext.NameOffset = cpu_to_le16(offsetof
4144                                 (struct create_lease_v2, Name));
4145         buf->ccontext.NameLength = cpu_to_le16(4);
4146         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
4147         buf->Name[0] = 'R';
4148         buf->Name[1] = 'q';
4149         buf->Name[2] = 'L';
4150         buf->Name[3] = 's';
4151         return (char *)buf;
4152 }
4153
4154 static __u8
4155 smb2_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
4156 {
4157         struct create_lease *lc = (struct create_lease *)buf;
4158
4159         *epoch = 0; /* not used */
4160         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE)
4161                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
4162         return le32_to_cpu(lc->lcontext.LeaseState);
4163 }
4164
4165 static __u8
4166 smb3_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
4167 {
4168         struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
4169
4170         *epoch = le16_to_cpu(lc->lcontext.Epoch);
4171         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE)
4172                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
4173         if (lease_key)
4174                 memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE);
4175         return le32_to_cpu(lc->lcontext.LeaseState);
4176 }
4177
4178 static unsigned int
4179 smb2_wp_retry_size(struct inode *inode)
4180 {
4181         return min_t(unsigned int, CIFS_SB(inode->i_sb)->ctx->wsize,
4182                      SMB2_MAX_BUFFER_SIZE);
4183 }
4184
4185 static bool
4186 smb2_dir_needs_close(struct cifsFileInfo *cfile)
4187 {
4188         return !cfile->invalidHandle;
4189 }
4190
4191 static void
4192 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len,
4193                    struct smb_rqst *old_rq, __le16 cipher_type)
4194 {
4195         struct smb2_hdr *shdr =
4196                         (struct smb2_hdr *)old_rq->rq_iov[0].iov_base;
4197
4198         memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
4199         tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
4200         tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
4201         tr_hdr->Flags = cpu_to_le16(0x01);
4202         if ((cipher_type == SMB2_ENCRYPTION_AES128_GCM) ||
4203             (cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4204                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
4205         else
4206                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
4207         memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8);
4208 }
4209
4210 static void *smb2_aead_req_alloc(struct crypto_aead *tfm, const struct smb_rqst *rqst,
4211                                  int num_rqst, const u8 *sig, u8 **iv,
4212                                  struct aead_request **req, struct sg_table *sgt,
4213                                  unsigned int *num_sgs, size_t *sensitive_size)
4214 {
4215         unsigned int req_size = sizeof(**req) + crypto_aead_reqsize(tfm);
4216         unsigned int iv_size = crypto_aead_ivsize(tfm);
4217         unsigned int len;
4218         u8 *p;
4219
4220         *num_sgs = cifs_get_num_sgs(rqst, num_rqst, sig);
4221         if (IS_ERR_VALUE((long)(int)*num_sgs))
4222                 return ERR_PTR(*num_sgs);
4223
4224         len = iv_size;
4225         len += crypto_aead_alignmask(tfm) & ~(crypto_tfm_ctx_alignment() - 1);
4226         len = ALIGN(len, crypto_tfm_ctx_alignment());
4227         len += req_size;
4228         len = ALIGN(len, __alignof__(struct scatterlist));
4229         len += array_size(*num_sgs, sizeof(struct scatterlist));
4230         *sensitive_size = len;
4231
4232         p = kvzalloc(len, GFP_NOFS);
4233         if (!p)
4234                 return ERR_PTR(-ENOMEM);
4235
4236         *iv = (u8 *)PTR_ALIGN(p, crypto_aead_alignmask(tfm) + 1);
4237         *req = (struct aead_request *)PTR_ALIGN(*iv + iv_size,
4238                                                 crypto_tfm_ctx_alignment());
4239         sgt->sgl = (struct scatterlist *)PTR_ALIGN((u8 *)*req + req_size,
4240                                                    __alignof__(struct scatterlist));
4241         return p;
4242 }
4243
4244 static void *smb2_get_aead_req(struct crypto_aead *tfm, struct smb_rqst *rqst,
4245                                int num_rqst, const u8 *sig, u8 **iv,
4246                                struct aead_request **req, struct scatterlist **sgl,
4247                                size_t *sensitive_size)
4248 {
4249         struct sg_table sgtable = {};
4250         unsigned int skip, num_sgs, i, j;
4251         ssize_t rc;
4252         void *p;
4253
4254         p = smb2_aead_req_alloc(tfm, rqst, num_rqst, sig, iv, req, &sgtable,
4255                                 &num_sgs, sensitive_size);
4256         if (IS_ERR(p))
4257                 return ERR_CAST(p);
4258
4259         sg_init_marker(sgtable.sgl, num_sgs);
4260
4261         /*
4262          * The first rqst has a transform header where the
4263          * first 20 bytes are not part of the encrypted blob.
4264          */
4265         skip = 20;
4266
4267         for (i = 0; i < num_rqst; i++) {
4268                 struct iov_iter *iter = &rqst[i].rq_iter;
4269                 size_t count = iov_iter_count(iter);
4270
4271                 for (j = 0; j < rqst[i].rq_nvec; j++) {
4272                         cifs_sg_set_buf(&sgtable,
4273                                         rqst[i].rq_iov[j].iov_base + skip,
4274                                         rqst[i].rq_iov[j].iov_len - skip);
4275
4276                         /* See the above comment on the 'skip' assignment */
4277                         skip = 0;
4278                 }
4279                 sgtable.orig_nents = sgtable.nents;
4280
4281                 rc = extract_iter_to_sg(iter, count, &sgtable,
4282                                         num_sgs - sgtable.nents, 0);
4283                 iov_iter_revert(iter, rc);
4284                 sgtable.orig_nents = sgtable.nents;
4285         }
4286
4287         cifs_sg_set_buf(&sgtable, sig, SMB2_SIGNATURE_SIZE);
4288         sg_mark_end(&sgtable.sgl[sgtable.nents - 1]);
4289         *sgl = sgtable.sgl;
4290         return p;
4291 }
4292
4293 static int
4294 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)
4295 {
4296         struct TCP_Server_Info *pserver;
4297         struct cifs_ses *ses;
4298         u8 *ses_enc_key;
4299
4300         /* If server is a channel, select the primary channel */
4301         pserver = SERVER_IS_CHAN(server) ? server->primary_server : server;
4302
4303         spin_lock(&cifs_tcp_ses_lock);
4304         list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) {
4305                 if (ses->Suid == ses_id) {
4306                         spin_lock(&ses->ses_lock);
4307                         ses_enc_key = enc ? ses->smb3encryptionkey :
4308                                 ses->smb3decryptionkey;
4309                         memcpy(key, ses_enc_key, SMB3_ENC_DEC_KEY_SIZE);
4310                         spin_unlock(&ses->ses_lock);
4311                         spin_unlock(&cifs_tcp_ses_lock);
4312                         return 0;
4313                 }
4314         }
4315         spin_unlock(&cifs_tcp_ses_lock);
4316
4317         trace_smb3_ses_not_found(ses_id);
4318
4319         return -EAGAIN;
4320 }
4321 /*
4322  * Encrypt or decrypt @rqst message. @rqst[0] has the following format:
4323  * iov[0]   - transform header (associate data),
4324  * iov[1-N] - SMB2 header and pages - data to encrypt.
4325  * On success return encrypted data in iov[1-N] and pages, leave iov[0]
4326  * untouched.
4327  */
4328 static int
4329 crypt_message(struct TCP_Server_Info *server, int num_rqst,
4330               struct smb_rqst *rqst, int enc)
4331 {
4332         struct smb2_transform_hdr *tr_hdr =
4333                 (struct smb2_transform_hdr *)rqst[0].rq_iov[0].iov_base;
4334         unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20;
4335         int rc = 0;
4336         struct scatterlist *sg;
4337         u8 sign[SMB2_SIGNATURE_SIZE] = {};
4338         u8 key[SMB3_ENC_DEC_KEY_SIZE];
4339         struct aead_request *req;
4340         u8 *iv;
4341         DECLARE_CRYPTO_WAIT(wait);
4342         struct crypto_aead *tfm;
4343         unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
4344         void *creq;
4345         size_t sensitive_size;
4346
4347         rc = smb2_get_enc_key(server, le64_to_cpu(tr_hdr->SessionId), enc, key);
4348         if (rc) {
4349                 cifs_server_dbg(FYI, "%s: Could not get %scryption key. sid: 0x%llx\n", __func__,
4350                          enc ? "en" : "de", le64_to_cpu(tr_hdr->SessionId));
4351                 return rc;
4352         }
4353
4354         rc = smb3_crypto_aead_allocate(server);
4355         if (rc) {
4356                 cifs_server_dbg(VFS, "%s: crypto alloc failed\n", __func__);
4357                 return rc;
4358         }
4359
4360         tfm = enc ? server->secmech.enc : server->secmech.dec;
4361
4362         if ((server->cipher_type == SMB2_ENCRYPTION_AES256_CCM) ||
4363                 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4364                 rc = crypto_aead_setkey(tfm, key, SMB3_GCM256_CRYPTKEY_SIZE);
4365         else
4366                 rc = crypto_aead_setkey(tfm, key, SMB3_GCM128_CRYPTKEY_SIZE);
4367
4368         if (rc) {
4369                 cifs_server_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc);
4370                 return rc;
4371         }
4372
4373         rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE);
4374         if (rc) {
4375                 cifs_server_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc);
4376                 return rc;
4377         }
4378
4379         creq = smb2_get_aead_req(tfm, rqst, num_rqst, sign, &iv, &req, &sg,
4380                                  &sensitive_size);
4381         if (IS_ERR(creq))
4382                 return PTR_ERR(creq);
4383
4384         if (!enc) {
4385                 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE);
4386                 crypt_len += SMB2_SIGNATURE_SIZE;
4387         }
4388
4389         if ((server->cipher_type == SMB2_ENCRYPTION_AES128_GCM) ||
4390             (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4391                 memcpy(iv, (char *)tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
4392         else {
4393                 iv[0] = 3;
4394                 memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
4395         }
4396
4397         aead_request_set_tfm(req, tfm);
4398         aead_request_set_crypt(req, sg, sg, crypt_len, iv);
4399         aead_request_set_ad(req, assoc_data_len);
4400
4401         aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
4402                                   crypto_req_done, &wait);
4403
4404         rc = crypto_wait_req(enc ? crypto_aead_encrypt(req)
4405                                 : crypto_aead_decrypt(req), &wait);
4406
4407         if (!rc && enc)
4408                 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE);
4409
4410         kvfree_sensitive(creq, sensitive_size);
4411         return rc;
4412 }
4413
4414 /*
4415  * Clear a read buffer, discarding the folios which have XA_MARK_0 set.
4416  */
4417 static void cifs_clear_xarray_buffer(struct xarray *buffer)
4418 {
4419         struct folio *folio;
4420
4421         XA_STATE(xas, buffer, 0);
4422
4423         rcu_read_lock();
4424         xas_for_each_marked(&xas, folio, ULONG_MAX, XA_MARK_0) {
4425                 folio_put(folio);
4426         }
4427         rcu_read_unlock();
4428         xa_destroy(buffer);
4429 }
4430
4431 void
4432 smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst)
4433 {
4434         int i;
4435
4436         for (i = 0; i < num_rqst; i++)
4437                 if (!xa_empty(&rqst[i].rq_buffer))
4438                         cifs_clear_xarray_buffer(&rqst[i].rq_buffer);
4439 }
4440
4441 /*
4442  * This function will initialize new_rq and encrypt the content.
4443  * The first entry, new_rq[0], only contains a single iov which contains
4444  * a smb2_transform_hdr and is pre-allocated by the caller.
4445  * This function then populates new_rq[1+] with the content from olq_rq[0+].
4446  *
4447  * The end result is an array of smb_rqst structures where the first structure
4448  * only contains a single iov for the transform header which we then can pass
4449  * to crypt_message().
4450  *
4451  * new_rq[0].rq_iov[0] :  smb2_transform_hdr pre-allocated by the caller
4452  * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests
4453  */
4454 static int
4455 smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst,
4456                        struct smb_rqst *new_rq, struct smb_rqst *old_rq)
4457 {
4458         struct smb2_transform_hdr *tr_hdr = new_rq[0].rq_iov[0].iov_base;
4459         struct page *page;
4460         unsigned int orig_len = 0;
4461         int i, j;
4462         int rc = -ENOMEM;
4463
4464         for (i = 1; i < num_rqst; i++) {
4465                 struct smb_rqst *old = &old_rq[i - 1];
4466                 struct smb_rqst *new = &new_rq[i];
4467                 struct xarray *buffer = &new->rq_buffer;
4468                 size_t size = iov_iter_count(&old->rq_iter), seg, copied = 0;
4469
4470                 orig_len += smb_rqst_len(server, old);
4471                 new->rq_iov = old->rq_iov;
4472                 new->rq_nvec = old->rq_nvec;
4473
4474                 xa_init(buffer);
4475
4476                 if (size > 0) {
4477                         unsigned int npages = DIV_ROUND_UP(size, PAGE_SIZE);
4478
4479                         for (j = 0; j < npages; j++) {
4480                                 void *o;
4481
4482                                 rc = -ENOMEM;
4483                                 page = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
4484                                 if (!page)
4485                                         goto err_free;
4486                                 page->index = j;
4487                                 o = xa_store(buffer, j, page, GFP_KERNEL);
4488                                 if (xa_is_err(o)) {
4489                                         rc = xa_err(o);
4490                                         put_page(page);
4491                                         goto err_free;
4492                                 }
4493
4494                                 xa_set_mark(buffer, j, XA_MARK_0);
4495
4496                                 seg = min_t(size_t, size - copied, PAGE_SIZE);
4497                                 if (copy_page_from_iter(page, 0, seg, &old->rq_iter) != seg) {
4498                                         rc = -EFAULT;
4499                                         goto err_free;
4500                                 }
4501                                 copied += seg;
4502                         }
4503                         iov_iter_xarray(&new->rq_iter, ITER_SOURCE,
4504                                         buffer, 0, size);
4505                         new->rq_iter_size = size;
4506                 }
4507         }
4508
4509         /* fill the 1st iov with a transform header */
4510         fill_transform_hdr(tr_hdr, orig_len, old_rq, server->cipher_type);
4511
4512         rc = crypt_message(server, num_rqst, new_rq, 1);
4513         cifs_dbg(FYI, "Encrypt message returned %d\n", rc);
4514         if (rc)
4515                 goto err_free;
4516
4517         return rc;
4518
4519 err_free:
4520         smb3_free_compound_rqst(num_rqst - 1, &new_rq[1]);
4521         return rc;
4522 }
4523
4524 static int
4525 smb3_is_transform_hdr(void *buf)
4526 {
4527         struct smb2_transform_hdr *trhdr = buf;
4528
4529         return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
4530 }
4531
4532 static int
4533 decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
4534                  unsigned int buf_data_size, struct iov_iter *iter,
4535                  bool is_offloaded)
4536 {
4537         struct kvec iov[2];
4538         struct smb_rqst rqst = {NULL};
4539         size_t iter_size = 0;
4540         int rc;
4541
4542         iov[0].iov_base = buf;
4543         iov[0].iov_len = sizeof(struct smb2_transform_hdr);
4544         iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr);
4545         iov[1].iov_len = buf_data_size;
4546
4547         rqst.rq_iov = iov;
4548         rqst.rq_nvec = 2;
4549         if (iter) {
4550                 rqst.rq_iter = *iter;
4551                 rqst.rq_iter_size = iov_iter_count(iter);
4552                 iter_size = iov_iter_count(iter);
4553         }
4554
4555         rc = crypt_message(server, 1, &rqst, 0);
4556         cifs_dbg(FYI, "Decrypt message returned %d\n", rc);
4557
4558         if (rc)
4559                 return rc;
4560
4561         memmove(buf, iov[1].iov_base, buf_data_size);
4562
4563         if (!is_offloaded)
4564                 server->total_read = buf_data_size + iter_size;
4565
4566         return rc;
4567 }
4568
4569 static int
4570 cifs_copy_pages_to_iter(struct xarray *pages, unsigned int data_size,
4571                         unsigned int skip, struct iov_iter *iter)
4572 {
4573         struct page *page;
4574         unsigned long index;
4575
4576         xa_for_each(pages, index, page) {
4577                 size_t n, len = min_t(unsigned int, PAGE_SIZE - skip, data_size);
4578
4579                 n = copy_page_to_iter(page, skip, len, iter);
4580                 if (n != len) {
4581                         cifs_dbg(VFS, "%s: something went wrong\n", __func__);
4582                         return -EIO;
4583                 }
4584                 data_size -= n;
4585                 skip = 0;
4586         }
4587
4588         return 0;
4589 }
4590
4591 static int
4592 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
4593                  char *buf, unsigned int buf_len, struct xarray *pages,
4594                  unsigned int pages_len, bool is_offloaded)
4595 {
4596         unsigned int data_offset;
4597         unsigned int data_len;
4598         unsigned int cur_off;
4599         unsigned int cur_page_idx;
4600         unsigned int pad_len;
4601         struct cifs_readdata *rdata = mid->callback_data;
4602         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
4603         int length;
4604         bool use_rdma_mr = false;
4605
4606         if (shdr->Command != SMB2_READ) {
4607                 cifs_server_dbg(VFS, "only big read responses are supported\n");
4608                 return -EOPNOTSUPP;
4609         }
4610
4611         if (server->ops->is_session_expired &&
4612             server->ops->is_session_expired(buf)) {
4613                 if (!is_offloaded)
4614                         cifs_reconnect(server, true);
4615                 return -1;
4616         }
4617
4618         if (server->ops->is_status_pending &&
4619                         server->ops->is_status_pending(buf, server))
4620                 return -1;
4621
4622         /* set up first two iov to get credits */
4623         rdata->iov[0].iov_base = buf;
4624         rdata->iov[0].iov_len = 0;
4625         rdata->iov[1].iov_base = buf;
4626         rdata->iov[1].iov_len =
4627                 min_t(unsigned int, buf_len, server->vals->read_rsp_size);
4628         cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
4629                  rdata->iov[0].iov_base, rdata->iov[0].iov_len);
4630         cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n",
4631                  rdata->iov[1].iov_base, rdata->iov[1].iov_len);
4632
4633         rdata->result = server->ops->map_error(buf, true);
4634         if (rdata->result != 0) {
4635                 cifs_dbg(FYI, "%s: server returned error %d\n",
4636                          __func__, rdata->result);
4637                 /* normal error on read response */
4638                 if (is_offloaded)
4639                         mid->mid_state = MID_RESPONSE_RECEIVED;
4640                 else
4641                         dequeue_mid(mid, false);
4642                 return 0;
4643         }
4644
4645         data_offset = server->ops->read_data_offset(buf);
4646 #ifdef CONFIG_CIFS_SMB_DIRECT
4647         use_rdma_mr = rdata->mr;
4648 #endif
4649         data_len = server->ops->read_data_length(buf, use_rdma_mr);
4650
4651         if (data_offset < server->vals->read_rsp_size) {
4652                 /*
4653                  * win2k8 sometimes sends an offset of 0 when the read
4654                  * is beyond the EOF. Treat it as if the data starts just after
4655                  * the header.
4656                  */
4657                 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n",
4658                          __func__, data_offset);
4659                 data_offset = server->vals->read_rsp_size;
4660         } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) {
4661                 /* data_offset is beyond the end of smallbuf */
4662                 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n",
4663                          __func__, data_offset);
4664                 rdata->result = -EIO;
4665                 if (is_offloaded)
4666                         mid->mid_state = MID_RESPONSE_MALFORMED;
4667                 else
4668                         dequeue_mid(mid, rdata->result);
4669                 return 0;
4670         }
4671
4672         pad_len = data_offset - server->vals->read_rsp_size;
4673
4674         if (buf_len <= data_offset) {
4675                 /* read response payload is in pages */
4676                 cur_page_idx = pad_len / PAGE_SIZE;
4677                 cur_off = pad_len % PAGE_SIZE;
4678
4679                 if (cur_page_idx != 0) {
4680                         /* data offset is beyond the 1st page of response */
4681                         cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n",
4682                                  __func__, data_offset);
4683                         rdata->result = -EIO;
4684                         if (is_offloaded)
4685                                 mid->mid_state = MID_RESPONSE_MALFORMED;
4686                         else
4687                                 dequeue_mid(mid, rdata->result);
4688                         return 0;
4689                 }
4690
4691                 if (data_len > pages_len - pad_len) {
4692                         /* data_len is corrupt -- discard frame */
4693                         rdata->result = -EIO;
4694                         if (is_offloaded)
4695                                 mid->mid_state = MID_RESPONSE_MALFORMED;
4696                         else
4697                                 dequeue_mid(mid, rdata->result);
4698                         return 0;
4699                 }
4700
4701                 /* Copy the data to the output I/O iterator. */
4702                 rdata->result = cifs_copy_pages_to_iter(pages, pages_len,
4703                                                         cur_off, &rdata->iter);
4704                 if (rdata->result != 0) {
4705                         if (is_offloaded)
4706                                 mid->mid_state = MID_RESPONSE_MALFORMED;
4707                         else
4708                                 dequeue_mid(mid, rdata->result);
4709                         return 0;
4710                 }
4711                 rdata->got_bytes = pages_len;
4712
4713         } else if (buf_len >= data_offset + data_len) {
4714                 /* read response payload is in buf */
4715                 WARN_ONCE(pages && !xa_empty(pages),
4716                           "read data can be either in buf or in pages");
4717                 length = copy_to_iter(buf + data_offset, data_len, &rdata->iter);
4718                 if (length < 0)
4719                         return length;
4720                 rdata->got_bytes = data_len;
4721         } else {
4722                 /* read response payload cannot be in both buf and pages */
4723                 WARN_ONCE(1, "buf can not contain only a part of read data");
4724                 rdata->result = -EIO;
4725                 if (is_offloaded)
4726                         mid->mid_state = MID_RESPONSE_MALFORMED;
4727                 else
4728                         dequeue_mid(mid, rdata->result);
4729                 return 0;
4730         }
4731
4732         if (is_offloaded)
4733                 mid->mid_state = MID_RESPONSE_RECEIVED;
4734         else
4735                 dequeue_mid(mid, false);
4736         return 0;
4737 }
4738
4739 struct smb2_decrypt_work {
4740         struct work_struct decrypt;
4741         struct TCP_Server_Info *server;
4742         struct xarray buffer;
4743         char *buf;
4744         unsigned int len;
4745 };
4746
4747
4748 static void smb2_decrypt_offload(struct work_struct *work)
4749 {
4750         struct smb2_decrypt_work *dw = container_of(work,
4751                                 struct smb2_decrypt_work, decrypt);
4752         int rc;
4753         struct mid_q_entry *mid;
4754         struct iov_iter iter;
4755
4756         iov_iter_xarray(&iter, ITER_DEST, &dw->buffer, 0, dw->len);
4757         rc = decrypt_raw_data(dw->server, dw->buf, dw->server->vals->read_rsp_size,
4758                               &iter, true);
4759         if (rc) {
4760                 cifs_dbg(VFS, "error decrypting rc=%d\n", rc);
4761                 goto free_pages;
4762         }
4763
4764         dw->server->lstrp = jiffies;
4765         mid = smb2_find_dequeue_mid(dw->server, dw->buf);
4766         if (mid == NULL)
4767                 cifs_dbg(FYI, "mid not found\n");
4768         else {
4769                 mid->decrypted = true;
4770                 rc = handle_read_data(dw->server, mid, dw->buf,
4771                                       dw->server->vals->read_rsp_size,
4772                                       &dw->buffer, dw->len,
4773                                       true);
4774                 if (rc >= 0) {
4775 #ifdef CONFIG_CIFS_STATS2
4776                         mid->when_received = jiffies;
4777 #endif
4778                         if (dw->server->ops->is_network_name_deleted)
4779                                 dw->server->ops->is_network_name_deleted(dw->buf,
4780                                                                          dw->server);
4781
4782                         mid->callback(mid);
4783                 } else {
4784                         spin_lock(&dw->server->srv_lock);
4785                         if (dw->server->tcpStatus == CifsNeedReconnect) {
4786                                 spin_lock(&dw->server->mid_lock);
4787                                 mid->mid_state = MID_RETRY_NEEDED;
4788                                 spin_unlock(&dw->server->mid_lock);
4789                                 spin_unlock(&dw->server->srv_lock);
4790                                 mid->callback(mid);
4791                         } else {
4792                                 spin_lock(&dw->server->mid_lock);
4793                                 mid->mid_state = MID_REQUEST_SUBMITTED;
4794                                 mid->mid_flags &= ~(MID_DELETED);
4795                                 list_add_tail(&mid->qhead,
4796                                         &dw->server->pending_mid_q);
4797                                 spin_unlock(&dw->server->mid_lock);
4798                                 spin_unlock(&dw->server->srv_lock);
4799                         }
4800                 }
4801                 release_mid(mid);
4802         }
4803
4804 free_pages:
4805         cifs_clear_xarray_buffer(&dw->buffer);
4806         cifs_small_buf_release(dw->buf);
4807         kfree(dw);
4808 }
4809
4810
4811 static int
4812 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid,
4813                        int *num_mids)
4814 {
4815         struct page *page;
4816         char *buf = server->smallbuf;
4817         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
4818         struct iov_iter iter;
4819         unsigned int len, npages;
4820         unsigned int buflen = server->pdu_size;
4821         int rc;
4822         int i = 0;
4823         struct smb2_decrypt_work *dw;
4824
4825         dw = kzalloc(sizeof(struct smb2_decrypt_work), GFP_KERNEL);
4826         if (!dw)
4827                 return -ENOMEM;
4828         xa_init(&dw->buffer);
4829         INIT_WORK(&dw->decrypt, smb2_decrypt_offload);
4830         dw->server = server;
4831
4832         *num_mids = 1;
4833         len = min_t(unsigned int, buflen, server->vals->read_rsp_size +
4834                 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1;
4835
4836         rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len);
4837         if (rc < 0)
4838                 goto free_dw;
4839         server->total_read += rc;
4840
4841         len = le32_to_cpu(tr_hdr->OriginalMessageSize) -
4842                 server->vals->read_rsp_size;
4843         dw->len = len;
4844         npages = DIV_ROUND_UP(len, PAGE_SIZE);
4845
4846         rc = -ENOMEM;
4847         for (; i < npages; i++) {
4848                 void *old;
4849
4850                 page = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
4851                 if (!page)
4852                         goto discard_data;
4853                 page->index = i;
4854                 old = xa_store(&dw->buffer, i, page, GFP_KERNEL);
4855                 if (xa_is_err(old)) {
4856                         rc = xa_err(old);
4857                         put_page(page);
4858                         goto discard_data;
4859                 }
4860                 xa_set_mark(&dw->buffer, i, XA_MARK_0);
4861         }
4862
4863         iov_iter_xarray(&iter, ITER_DEST, &dw->buffer, 0, npages * PAGE_SIZE);
4864
4865         /* Read the data into the buffer and clear excess bufferage. */
4866         rc = cifs_read_iter_from_socket(server, &iter, dw->len);
4867         if (rc < 0)
4868                 goto discard_data;
4869
4870         server->total_read += rc;
4871         if (rc < npages * PAGE_SIZE)
4872                 iov_iter_zero(npages * PAGE_SIZE - rc, &iter);
4873         iov_iter_revert(&iter, npages * PAGE_SIZE);
4874         iov_iter_truncate(&iter, dw->len);
4875
4876         rc = cifs_discard_remaining_data(server);
4877         if (rc)
4878                 goto free_pages;
4879
4880         /*
4881          * For large reads, offload to different thread for better performance,
4882          * use more cores decrypting which can be expensive
4883          */
4884
4885         if ((server->min_offload) && (server->in_flight > 1) &&
4886             (server->pdu_size >= server->min_offload)) {
4887                 dw->buf = server->smallbuf;
4888                 server->smallbuf = (char *)cifs_small_buf_get();
4889
4890                 queue_work(decrypt_wq, &dw->decrypt);
4891                 *num_mids = 0; /* worker thread takes care of finding mid */
4892                 return -1;
4893         }
4894
4895         rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size,
4896                               &iter, false);
4897         if (rc)
4898                 goto free_pages;
4899
4900         *mid = smb2_find_mid(server, buf);
4901         if (*mid == NULL) {
4902                 cifs_dbg(FYI, "mid not found\n");
4903         } else {
4904                 cifs_dbg(FYI, "mid found\n");
4905                 (*mid)->decrypted = true;
4906                 rc = handle_read_data(server, *mid, buf,
4907                                       server->vals->read_rsp_size,
4908                                       &dw->buffer, dw->len, false);
4909                 if (rc >= 0) {
4910                         if (server->ops->is_network_name_deleted) {
4911                                 server->ops->is_network_name_deleted(buf,
4912                                                                 server);
4913                         }
4914                 }
4915         }
4916
4917 free_pages:
4918         cifs_clear_xarray_buffer(&dw->buffer);
4919 free_dw:
4920         kfree(dw);
4921         return rc;
4922 discard_data:
4923         cifs_discard_remaining_data(server);
4924         goto free_pages;
4925 }
4926
4927 static int
4928 receive_encrypted_standard(struct TCP_Server_Info *server,
4929                            struct mid_q_entry **mids, char **bufs,
4930                            int *num_mids)
4931 {
4932         int ret, length;
4933         char *buf = server->smallbuf;
4934         struct smb2_hdr *shdr;
4935         unsigned int pdu_length = server->pdu_size;
4936         unsigned int buf_size;
4937         struct mid_q_entry *mid_entry;
4938         int next_is_large;
4939         char *next_buffer = NULL;
4940
4941         *num_mids = 0;
4942
4943         /* switch to large buffer if too big for a small one */
4944         if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) {
4945                 server->large_buf = true;
4946                 memcpy(server->bigbuf, buf, server->total_read);
4947                 buf = server->bigbuf;
4948         }
4949
4950         /* now read the rest */
4951         length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
4952                                 pdu_length - HEADER_SIZE(server) + 1);
4953         if (length < 0)
4954                 return length;
4955         server->total_read += length;
4956
4957         buf_size = pdu_length - sizeof(struct smb2_transform_hdr);
4958         length = decrypt_raw_data(server, buf, buf_size, NULL, false);
4959         if (length)
4960                 return length;
4961
4962         next_is_large = server->large_buf;
4963 one_more:
4964         shdr = (struct smb2_hdr *)buf;
4965         if (shdr->NextCommand) {
4966                 if (next_is_large)
4967                         next_buffer = (char *)cifs_buf_get();
4968                 else
4969                         next_buffer = (char *)cifs_small_buf_get();
4970                 memcpy(next_buffer,
4971                        buf + le32_to_cpu(shdr->NextCommand),
4972                        pdu_length - le32_to_cpu(shdr->NextCommand));
4973         }
4974
4975         mid_entry = smb2_find_mid(server, buf);
4976         if (mid_entry == NULL)
4977                 cifs_dbg(FYI, "mid not found\n");
4978         else {
4979                 cifs_dbg(FYI, "mid found\n");
4980                 mid_entry->decrypted = true;
4981                 mid_entry->resp_buf_size = server->pdu_size;
4982         }
4983
4984         if (*num_mids >= MAX_COMPOUND) {
4985                 cifs_server_dbg(VFS, "too many PDUs in compound\n");
4986                 return -1;
4987         }
4988         bufs[*num_mids] = buf;
4989         mids[(*num_mids)++] = mid_entry;
4990
4991         if (mid_entry && mid_entry->handle)
4992                 ret = mid_entry->handle(server, mid_entry);
4993         else
4994                 ret = cifs_handle_standard(server, mid_entry);
4995
4996         if (ret == 0 && shdr->NextCommand) {
4997                 pdu_length -= le32_to_cpu(shdr->NextCommand);
4998                 server->large_buf = next_is_large;
4999                 if (next_is_large)
5000                         server->bigbuf = buf = next_buffer;
5001                 else
5002                         server->smallbuf = buf = next_buffer;
5003                 goto one_more;
5004         } else if (ret != 0) {
5005                 /*
5006                  * ret != 0 here means that we didn't get to handle_mid() thus
5007                  * server->smallbuf and server->bigbuf are still valid. We need
5008                  * to free next_buffer because it is not going to be used
5009                  * anywhere.
5010                  */
5011                 if (next_is_large)
5012                         free_rsp_buf(CIFS_LARGE_BUFFER, next_buffer);
5013                 else
5014                         free_rsp_buf(CIFS_SMALL_BUFFER, next_buffer);
5015         }
5016
5017         return ret;
5018 }
5019
5020 static int
5021 smb3_receive_transform(struct TCP_Server_Info *server,
5022                        struct mid_q_entry **mids, char **bufs, int *num_mids)
5023 {
5024         char *buf = server->smallbuf;
5025         unsigned int pdu_length = server->pdu_size;
5026         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
5027         unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
5028
5029         if (pdu_length < sizeof(struct smb2_transform_hdr) +
5030                                                 sizeof(struct smb2_hdr)) {
5031                 cifs_server_dbg(VFS, "Transform message is too small (%u)\n",
5032                          pdu_length);
5033                 cifs_reconnect(server, true);
5034                 return -ECONNABORTED;
5035         }
5036
5037         if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) {
5038                 cifs_server_dbg(VFS, "Transform message is broken\n");
5039                 cifs_reconnect(server, true);
5040                 return -ECONNABORTED;
5041         }
5042
5043         /* TODO: add support for compounds containing READ. */
5044         if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server)) {
5045                 return receive_encrypted_read(server, &mids[0], num_mids);
5046         }
5047
5048         return receive_encrypted_standard(server, mids, bufs, num_mids);
5049 }
5050
5051 int
5052 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid)
5053 {
5054         char *buf = server->large_buf ? server->bigbuf : server->smallbuf;
5055
5056         return handle_read_data(server, mid, buf, server->pdu_size,
5057                                 NULL, 0, false);
5058 }
5059
5060 static int
5061 smb2_next_header(char *buf)
5062 {
5063         struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
5064         struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf;
5065
5066         if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM)
5067                 return sizeof(struct smb2_transform_hdr) +
5068                   le32_to_cpu(t_hdr->OriginalMessageSize);
5069
5070         return le32_to_cpu(hdr->NextCommand);
5071 }
5072
5073 static int
5074 smb2_make_node(unsigned int xid, struct inode *inode,
5075                struct dentry *dentry, struct cifs_tcon *tcon,
5076                const char *full_path, umode_t mode, dev_t dev)
5077 {
5078         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
5079         int rc = -EPERM;
5080         struct cifs_open_info_data buf = {};
5081         struct cifs_io_parms io_parms = {0};
5082         __u32 oplock = 0;
5083         struct cifs_fid fid;
5084         struct cifs_open_parms oparms;
5085         unsigned int bytes_written;
5086         struct win_dev *pdev;
5087         struct kvec iov[2];
5088
5089         /*
5090          * Check if mounted with mount parm 'sfu' mount parm.
5091          * SFU emulation should work with all servers, but only
5092          * supports block and char device (no socket & fifo),
5093          * and was used by default in earlier versions of Windows
5094          */
5095         if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL))
5096                 return rc;
5097
5098         /*
5099          * TODO: Add ability to create instead via reparse point. Windows (e.g.
5100          * their current NFS server) uses this approach to expose special files
5101          * over SMB2/SMB3 and Samba will do this with SMB3.1.1 POSIX Extensions
5102          */
5103
5104         if (!S_ISCHR(mode) && !S_ISBLK(mode) && !S_ISFIFO(mode))
5105                 return rc;
5106
5107         cifs_dbg(FYI, "sfu compat create special file\n");
5108
5109         oparms = (struct cifs_open_parms) {
5110                 .tcon = tcon,
5111                 .cifs_sb = cifs_sb,
5112                 .desired_access = GENERIC_WRITE,
5113                 .create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR |
5114                                                       CREATE_OPTION_SPECIAL),
5115                 .disposition = FILE_CREATE,
5116                 .path = full_path,
5117                 .fid = &fid,
5118         };
5119
5120         if (tcon->ses->server->oplocks)
5121                 oplock = REQ_OPLOCK;
5122         else
5123                 oplock = 0;
5124         rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, &buf);
5125         if (rc)
5126                 return rc;
5127
5128         /*
5129          * BB Do not bother to decode buf since no local inode yet to put
5130          * timestamps in, but we can reuse it safely.
5131          */
5132
5133         pdev = (struct win_dev *)&buf.fi;
5134         io_parms.pid = current->tgid;
5135         io_parms.tcon = tcon;
5136         io_parms.offset = 0;
5137         io_parms.length = sizeof(struct win_dev);
5138         iov[1].iov_base = &buf.fi;
5139         iov[1].iov_len = sizeof(struct win_dev);
5140         if (S_ISCHR(mode)) {
5141                 memcpy(pdev->type, "IntxCHR", 8);
5142                 pdev->major = cpu_to_le64(MAJOR(dev));
5143                 pdev->minor = cpu_to_le64(MINOR(dev));
5144                 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
5145                                                         &bytes_written, iov, 1);
5146         } else if (S_ISBLK(mode)) {
5147                 memcpy(pdev->type, "IntxBLK", 8);
5148                 pdev->major = cpu_to_le64(MAJOR(dev));
5149                 pdev->minor = cpu_to_le64(MINOR(dev));
5150                 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
5151                                                         &bytes_written, iov, 1);
5152         } else if (S_ISFIFO(mode)) {
5153                 memcpy(pdev->type, "LnxFIFO", 8);
5154                 pdev->major = 0;
5155                 pdev->minor = 0;
5156                 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
5157                                                         &bytes_written, iov, 1);
5158         }
5159         tcon->ses->server->ops->close(xid, tcon, &fid);
5160         d_drop(dentry);
5161
5162         /* FIXME: add code here to set EAs */
5163
5164         cifs_free_open_info(&buf);
5165         return rc;
5166 }
5167
5168 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
5169 struct smb_version_operations smb20_operations = {
5170         .compare_fids = smb2_compare_fids,
5171         .setup_request = smb2_setup_request,
5172         .setup_async_request = smb2_setup_async_request,
5173         .check_receive = smb2_check_receive,
5174         .add_credits = smb2_add_credits,
5175         .set_credits = smb2_set_credits,
5176         .get_credits_field = smb2_get_credits_field,
5177         .get_credits = smb2_get_credits,
5178         .wait_mtu_credits = cifs_wait_mtu_credits,
5179         .get_next_mid = smb2_get_next_mid,
5180         .revert_current_mid = smb2_revert_current_mid,
5181         .read_data_offset = smb2_read_data_offset,
5182         .read_data_length = smb2_read_data_length,
5183         .map_error = map_smb2_to_linux_error,
5184         .find_mid = smb2_find_mid,
5185         .check_message = smb2_check_message,
5186         .dump_detail = smb2_dump_detail,
5187         .clear_stats = smb2_clear_stats,
5188         .print_stats = smb2_print_stats,
5189         .is_oplock_break = smb2_is_valid_oplock_break,
5190         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5191         .downgrade_oplock = smb2_downgrade_oplock,
5192         .need_neg = smb2_need_neg,
5193         .negotiate = smb2_negotiate,
5194         .negotiate_wsize = smb2_negotiate_wsize,
5195         .negotiate_rsize = smb2_negotiate_rsize,
5196         .sess_setup = SMB2_sess_setup,
5197         .logoff = SMB2_logoff,
5198         .tree_connect = SMB2_tcon,
5199         .tree_disconnect = SMB2_tdis,
5200         .qfs_tcon = smb2_qfs_tcon,
5201         .is_path_accessible = smb2_is_path_accessible,
5202         .can_echo = smb2_can_echo,
5203         .echo = SMB2_echo,
5204         .query_path_info = smb2_query_path_info,
5205         .query_reparse_point = smb2_query_reparse_point,
5206         .get_srv_inum = smb2_get_srv_inum,
5207         .query_file_info = smb2_query_file_info,
5208         .set_path_size = smb2_set_path_size,
5209         .set_file_size = smb2_set_file_size,
5210         .set_file_info = smb2_set_file_info,
5211         .set_compression = smb2_set_compression,
5212         .mkdir = smb2_mkdir,
5213         .mkdir_setinfo = smb2_mkdir_setinfo,
5214         .rmdir = smb2_rmdir,
5215         .unlink = smb2_unlink,
5216         .rename = smb2_rename_path,
5217         .create_hardlink = smb2_create_hardlink,
5218         .query_symlink = smb2_query_symlink,
5219         .query_mf_symlink = smb3_query_mf_symlink,
5220         .create_mf_symlink = smb3_create_mf_symlink,
5221         .open = smb2_open_file,
5222         .set_fid = smb2_set_fid,
5223         .close = smb2_close_file,
5224         .flush = smb2_flush_file,
5225         .async_readv = smb2_async_readv,
5226         .async_writev = smb2_async_writev,
5227         .sync_read = smb2_sync_read,
5228         .sync_write = smb2_sync_write,
5229         .query_dir_first = smb2_query_dir_first,
5230         .query_dir_next = smb2_query_dir_next,
5231         .close_dir = smb2_close_dir,
5232         .calc_smb_size = smb2_calc_size,
5233         .is_status_pending = smb2_is_status_pending,
5234         .is_session_expired = smb2_is_session_expired,
5235         .oplock_response = smb2_oplock_response,
5236         .queryfs = smb2_queryfs,
5237         .mand_lock = smb2_mand_lock,
5238         .mand_unlock_range = smb2_unlock_range,
5239         .push_mand_locks = smb2_push_mandatory_locks,
5240         .get_lease_key = smb2_get_lease_key,
5241         .set_lease_key = smb2_set_lease_key,
5242         .new_lease_key = smb2_new_lease_key,
5243         .calc_signature = smb2_calc_signature,
5244         .is_read_op = smb2_is_read_op,
5245         .set_oplock_level = smb2_set_oplock_level,
5246         .create_lease_buf = smb2_create_lease_buf,
5247         .parse_lease_buf = smb2_parse_lease_buf,
5248         .copychunk_range = smb2_copychunk_range,
5249         .wp_retry_size = smb2_wp_retry_size,
5250         .dir_needs_close = smb2_dir_needs_close,
5251         .get_dfs_refer = smb2_get_dfs_refer,
5252         .select_sectype = smb2_select_sectype,
5253 #ifdef CONFIG_CIFS_XATTR
5254         .query_all_EAs = smb2_query_eas,
5255         .set_EA = smb2_set_ea,
5256 #endif /* CIFS_XATTR */
5257         .get_acl = get_smb2_acl,
5258         .get_acl_by_fid = get_smb2_acl_by_fid,
5259         .set_acl = set_smb2_acl,
5260         .next_header = smb2_next_header,
5261         .ioctl_query_info = smb2_ioctl_query_info,
5262         .make_node = smb2_make_node,
5263         .fiemap = smb3_fiemap,
5264         .llseek = smb3_llseek,
5265         .is_status_io_timeout = smb2_is_status_io_timeout,
5266         .is_network_name_deleted = smb2_is_network_name_deleted,
5267 };
5268 #endif /* CIFS_ALLOW_INSECURE_LEGACY */
5269
5270 struct smb_version_operations smb21_operations = {
5271         .compare_fids = smb2_compare_fids,
5272         .setup_request = smb2_setup_request,
5273         .setup_async_request = smb2_setup_async_request,
5274         .check_receive = smb2_check_receive,
5275         .add_credits = smb2_add_credits,
5276         .set_credits = smb2_set_credits,
5277         .get_credits_field = smb2_get_credits_field,
5278         .get_credits = smb2_get_credits,
5279         .wait_mtu_credits = smb2_wait_mtu_credits,
5280         .adjust_credits = smb2_adjust_credits,
5281         .get_next_mid = smb2_get_next_mid,
5282         .revert_current_mid = smb2_revert_current_mid,
5283         .read_data_offset = smb2_read_data_offset,
5284         .read_data_length = smb2_read_data_length,
5285         .map_error = map_smb2_to_linux_error,
5286         .find_mid = smb2_find_mid,
5287         .check_message = smb2_check_message,
5288         .dump_detail = smb2_dump_detail,
5289         .clear_stats = smb2_clear_stats,
5290         .print_stats = smb2_print_stats,
5291         .is_oplock_break = smb2_is_valid_oplock_break,
5292         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5293         .downgrade_oplock = smb2_downgrade_oplock,
5294         .need_neg = smb2_need_neg,
5295         .negotiate = smb2_negotiate,
5296         .negotiate_wsize = smb2_negotiate_wsize,
5297         .negotiate_rsize = smb2_negotiate_rsize,
5298         .sess_setup = SMB2_sess_setup,
5299         .logoff = SMB2_logoff,
5300         .tree_connect = SMB2_tcon,
5301         .tree_disconnect = SMB2_tdis,
5302         .qfs_tcon = smb2_qfs_tcon,
5303         .is_path_accessible = smb2_is_path_accessible,
5304         .can_echo = smb2_can_echo,
5305         .echo = SMB2_echo,
5306         .query_path_info = smb2_query_path_info,
5307         .query_reparse_point = smb2_query_reparse_point,
5308         .get_srv_inum = smb2_get_srv_inum,
5309         .query_file_info = smb2_query_file_info,
5310         .set_path_size = smb2_set_path_size,
5311         .set_file_size = smb2_set_file_size,
5312         .set_file_info = smb2_set_file_info,
5313         .set_compression = smb2_set_compression,
5314         .mkdir = smb2_mkdir,
5315         .mkdir_setinfo = smb2_mkdir_setinfo,
5316         .rmdir = smb2_rmdir,
5317         .unlink = smb2_unlink,
5318         .rename = smb2_rename_path,
5319         .create_hardlink = smb2_create_hardlink,
5320         .query_symlink = smb2_query_symlink,
5321         .query_mf_symlink = smb3_query_mf_symlink,
5322         .create_mf_symlink = smb3_create_mf_symlink,
5323         .open = smb2_open_file,
5324         .set_fid = smb2_set_fid,
5325         .close = smb2_close_file,
5326         .flush = smb2_flush_file,
5327         .async_readv = smb2_async_readv,
5328         .async_writev = smb2_async_writev,
5329         .sync_read = smb2_sync_read,
5330         .sync_write = smb2_sync_write,
5331         .query_dir_first = smb2_query_dir_first,
5332         .query_dir_next = smb2_query_dir_next,
5333         .close_dir = smb2_close_dir,
5334         .calc_smb_size = smb2_calc_size,
5335         .is_status_pending = smb2_is_status_pending,
5336         .is_session_expired = smb2_is_session_expired,
5337         .oplock_response = smb2_oplock_response,
5338         .queryfs = smb2_queryfs,
5339         .mand_lock = smb2_mand_lock,
5340         .mand_unlock_range = smb2_unlock_range,
5341         .push_mand_locks = smb2_push_mandatory_locks,
5342         .get_lease_key = smb2_get_lease_key,
5343         .set_lease_key = smb2_set_lease_key,
5344         .new_lease_key = smb2_new_lease_key,
5345         .calc_signature = smb2_calc_signature,
5346         .is_read_op = smb21_is_read_op,
5347         .set_oplock_level = smb21_set_oplock_level,
5348         .create_lease_buf = smb2_create_lease_buf,
5349         .parse_lease_buf = smb2_parse_lease_buf,
5350         .copychunk_range = smb2_copychunk_range,
5351         .wp_retry_size = smb2_wp_retry_size,
5352         .dir_needs_close = smb2_dir_needs_close,
5353         .enum_snapshots = smb3_enum_snapshots,
5354         .notify = smb3_notify,
5355         .get_dfs_refer = smb2_get_dfs_refer,
5356         .select_sectype = smb2_select_sectype,
5357 #ifdef CONFIG_CIFS_XATTR
5358         .query_all_EAs = smb2_query_eas,
5359         .set_EA = smb2_set_ea,
5360 #endif /* CIFS_XATTR */
5361         .get_acl = get_smb2_acl,
5362         .get_acl_by_fid = get_smb2_acl_by_fid,
5363         .set_acl = set_smb2_acl,
5364         .next_header = smb2_next_header,
5365         .ioctl_query_info = smb2_ioctl_query_info,
5366         .make_node = smb2_make_node,
5367         .fiemap = smb3_fiemap,
5368         .llseek = smb3_llseek,
5369         .is_status_io_timeout = smb2_is_status_io_timeout,
5370         .is_network_name_deleted = smb2_is_network_name_deleted,
5371 };
5372
5373 struct smb_version_operations smb30_operations = {
5374         .compare_fids = smb2_compare_fids,
5375         .setup_request = smb2_setup_request,
5376         .setup_async_request = smb2_setup_async_request,
5377         .check_receive = smb2_check_receive,
5378         .add_credits = smb2_add_credits,
5379         .set_credits = smb2_set_credits,
5380         .get_credits_field = smb2_get_credits_field,
5381         .get_credits = smb2_get_credits,
5382         .wait_mtu_credits = smb2_wait_mtu_credits,
5383         .adjust_credits = smb2_adjust_credits,
5384         .get_next_mid = smb2_get_next_mid,
5385         .revert_current_mid = smb2_revert_current_mid,
5386         .read_data_offset = smb2_read_data_offset,
5387         .read_data_length = smb2_read_data_length,
5388         .map_error = map_smb2_to_linux_error,
5389         .find_mid = smb2_find_mid,
5390         .check_message = smb2_check_message,
5391         .dump_detail = smb2_dump_detail,
5392         .clear_stats = smb2_clear_stats,
5393         .print_stats = smb2_print_stats,
5394         .dump_share_caps = smb2_dump_share_caps,
5395         .is_oplock_break = smb2_is_valid_oplock_break,
5396         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5397         .downgrade_oplock = smb3_downgrade_oplock,
5398         .need_neg = smb2_need_neg,
5399         .negotiate = smb2_negotiate,
5400         .negotiate_wsize = smb3_negotiate_wsize,
5401         .negotiate_rsize = smb3_negotiate_rsize,
5402         .sess_setup = SMB2_sess_setup,
5403         .logoff = SMB2_logoff,
5404         .tree_connect = SMB2_tcon,
5405         .tree_disconnect = SMB2_tdis,
5406         .qfs_tcon = smb3_qfs_tcon,
5407         .is_path_accessible = smb2_is_path_accessible,
5408         .can_echo = smb2_can_echo,
5409         .echo = SMB2_echo,
5410         .query_path_info = smb2_query_path_info,
5411         /* WSL tags introduced long after smb2.1, enable for SMB3, 3.11 only */
5412         .query_reparse_point = smb2_query_reparse_point,
5413         .get_srv_inum = smb2_get_srv_inum,
5414         .query_file_info = smb2_query_file_info,
5415         .set_path_size = smb2_set_path_size,
5416         .set_file_size = smb2_set_file_size,
5417         .set_file_info = smb2_set_file_info,
5418         .set_compression = smb2_set_compression,
5419         .mkdir = smb2_mkdir,
5420         .mkdir_setinfo = smb2_mkdir_setinfo,
5421         .rmdir = smb2_rmdir,
5422         .unlink = smb2_unlink,
5423         .rename = smb2_rename_path,
5424         .create_hardlink = smb2_create_hardlink,
5425         .query_symlink = smb2_query_symlink,
5426         .query_mf_symlink = smb3_query_mf_symlink,
5427         .create_mf_symlink = smb3_create_mf_symlink,
5428         .open = smb2_open_file,
5429         .set_fid = smb2_set_fid,
5430         .close = smb2_close_file,
5431         .close_getattr = smb2_close_getattr,
5432         .flush = smb2_flush_file,
5433         .async_readv = smb2_async_readv,
5434         .async_writev = smb2_async_writev,
5435         .sync_read = smb2_sync_read,
5436         .sync_write = smb2_sync_write,
5437         .query_dir_first = smb2_query_dir_first,
5438         .query_dir_next = smb2_query_dir_next,
5439         .close_dir = smb2_close_dir,
5440         .calc_smb_size = smb2_calc_size,
5441         .is_status_pending = smb2_is_status_pending,
5442         .is_session_expired = smb2_is_session_expired,
5443         .oplock_response = smb2_oplock_response,
5444         .queryfs = smb2_queryfs,
5445         .mand_lock = smb2_mand_lock,
5446         .mand_unlock_range = smb2_unlock_range,
5447         .push_mand_locks = smb2_push_mandatory_locks,
5448         .get_lease_key = smb2_get_lease_key,
5449         .set_lease_key = smb2_set_lease_key,
5450         .new_lease_key = smb2_new_lease_key,
5451         .generate_signingkey = generate_smb30signingkey,
5452         .calc_signature = smb3_calc_signature,
5453         .set_integrity  = smb3_set_integrity,
5454         .is_read_op = smb21_is_read_op,
5455         .set_oplock_level = smb3_set_oplock_level,
5456         .create_lease_buf = smb3_create_lease_buf,
5457         .parse_lease_buf = smb3_parse_lease_buf,
5458         .copychunk_range = smb2_copychunk_range,
5459         .duplicate_extents = smb2_duplicate_extents,
5460         .validate_negotiate = smb3_validate_negotiate,
5461         .wp_retry_size = smb2_wp_retry_size,
5462         .dir_needs_close = smb2_dir_needs_close,
5463         .fallocate = smb3_fallocate,
5464         .enum_snapshots = smb3_enum_snapshots,
5465         .notify = smb3_notify,
5466         .init_transform_rq = smb3_init_transform_rq,
5467         .is_transform_hdr = smb3_is_transform_hdr,
5468         .receive_transform = smb3_receive_transform,
5469         .get_dfs_refer = smb2_get_dfs_refer,
5470         .select_sectype = smb2_select_sectype,
5471 #ifdef CONFIG_CIFS_XATTR
5472         .query_all_EAs = smb2_query_eas,
5473         .set_EA = smb2_set_ea,
5474 #endif /* CIFS_XATTR */
5475         .get_acl = get_smb2_acl,
5476         .get_acl_by_fid = get_smb2_acl_by_fid,
5477         .set_acl = set_smb2_acl,
5478         .next_header = smb2_next_header,
5479         .ioctl_query_info = smb2_ioctl_query_info,
5480         .make_node = smb2_make_node,
5481         .fiemap = smb3_fiemap,
5482         .llseek = smb3_llseek,
5483         .is_status_io_timeout = smb2_is_status_io_timeout,
5484         .is_network_name_deleted = smb2_is_network_name_deleted,
5485 };
5486
5487 struct smb_version_operations smb311_operations = {
5488         .compare_fids = smb2_compare_fids,
5489         .setup_request = smb2_setup_request,
5490         .setup_async_request = smb2_setup_async_request,
5491         .check_receive = smb2_check_receive,
5492         .add_credits = smb2_add_credits,
5493         .set_credits = smb2_set_credits,
5494         .get_credits_field = smb2_get_credits_field,
5495         .get_credits = smb2_get_credits,
5496         .wait_mtu_credits = smb2_wait_mtu_credits,
5497         .adjust_credits = smb2_adjust_credits,
5498         .get_next_mid = smb2_get_next_mid,
5499         .revert_current_mid = smb2_revert_current_mid,
5500         .read_data_offset = smb2_read_data_offset,
5501         .read_data_length = smb2_read_data_length,
5502         .map_error = map_smb2_to_linux_error,
5503         .find_mid = smb2_find_mid,
5504         .check_message = smb2_check_message,
5505         .dump_detail = smb2_dump_detail,
5506         .clear_stats = smb2_clear_stats,
5507         .print_stats = smb2_print_stats,
5508         .dump_share_caps = smb2_dump_share_caps,
5509         .is_oplock_break = smb2_is_valid_oplock_break,
5510         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5511         .downgrade_oplock = smb3_downgrade_oplock,
5512         .need_neg = smb2_need_neg,
5513         .negotiate = smb2_negotiate,
5514         .negotiate_wsize = smb3_negotiate_wsize,
5515         .negotiate_rsize = smb3_negotiate_rsize,
5516         .sess_setup = SMB2_sess_setup,
5517         .logoff = SMB2_logoff,
5518         .tree_connect = SMB2_tcon,
5519         .tree_disconnect = SMB2_tdis,
5520         .qfs_tcon = smb3_qfs_tcon,
5521         .is_path_accessible = smb2_is_path_accessible,
5522         .can_echo = smb2_can_echo,
5523         .echo = SMB2_echo,
5524         .query_path_info = smb2_query_path_info,
5525         .query_reparse_point = smb2_query_reparse_point,
5526         .get_srv_inum = smb2_get_srv_inum,
5527         .query_file_info = smb2_query_file_info,
5528         .set_path_size = smb2_set_path_size,
5529         .set_file_size = smb2_set_file_size,
5530         .set_file_info = smb2_set_file_info,
5531         .set_compression = smb2_set_compression,
5532         .mkdir = smb2_mkdir,
5533         .mkdir_setinfo = smb2_mkdir_setinfo,
5534         .posix_mkdir = smb311_posix_mkdir,
5535         .rmdir = smb2_rmdir,
5536         .unlink = smb2_unlink,
5537         .rename = smb2_rename_path,
5538         .create_hardlink = smb2_create_hardlink,
5539         .query_symlink = smb2_query_symlink,
5540         .query_mf_symlink = smb3_query_mf_symlink,
5541         .create_mf_symlink = smb3_create_mf_symlink,
5542         .open = smb2_open_file,
5543         .set_fid = smb2_set_fid,
5544         .close = smb2_close_file,
5545         .close_getattr = smb2_close_getattr,
5546         .flush = smb2_flush_file,
5547         .async_readv = smb2_async_readv,
5548         .async_writev = smb2_async_writev,
5549         .sync_read = smb2_sync_read,
5550         .sync_write = smb2_sync_write,
5551         .query_dir_first = smb2_query_dir_first,
5552         .query_dir_next = smb2_query_dir_next,
5553         .close_dir = smb2_close_dir,
5554         .calc_smb_size = smb2_calc_size,
5555         .is_status_pending = smb2_is_status_pending,
5556         .is_session_expired = smb2_is_session_expired,
5557         .oplock_response = smb2_oplock_response,
5558         .queryfs = smb311_queryfs,
5559         .mand_lock = smb2_mand_lock,
5560         .mand_unlock_range = smb2_unlock_range,
5561         .push_mand_locks = smb2_push_mandatory_locks,
5562         .get_lease_key = smb2_get_lease_key,
5563         .set_lease_key = smb2_set_lease_key,
5564         .new_lease_key = smb2_new_lease_key,
5565         .generate_signingkey = generate_smb311signingkey,
5566         .calc_signature = smb3_calc_signature,
5567         .set_integrity  = smb3_set_integrity,
5568         .is_read_op = smb21_is_read_op,
5569         .set_oplock_level = smb3_set_oplock_level,
5570         .create_lease_buf = smb3_create_lease_buf,
5571         .parse_lease_buf = smb3_parse_lease_buf,
5572         .copychunk_range = smb2_copychunk_range,
5573         .duplicate_extents = smb2_duplicate_extents,
5574 /*      .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
5575         .wp_retry_size = smb2_wp_retry_size,
5576         .dir_needs_close = smb2_dir_needs_close,
5577         .fallocate = smb3_fallocate,
5578         .enum_snapshots = smb3_enum_snapshots,
5579         .notify = smb3_notify,
5580         .init_transform_rq = smb3_init_transform_rq,
5581         .is_transform_hdr = smb3_is_transform_hdr,
5582         .receive_transform = smb3_receive_transform,
5583         .get_dfs_refer = smb2_get_dfs_refer,
5584         .select_sectype = smb2_select_sectype,
5585 #ifdef CONFIG_CIFS_XATTR
5586         .query_all_EAs = smb2_query_eas,
5587         .set_EA = smb2_set_ea,
5588 #endif /* CIFS_XATTR */
5589         .get_acl = get_smb2_acl,
5590         .get_acl_by_fid = get_smb2_acl_by_fid,
5591         .set_acl = set_smb2_acl,
5592         .next_header = smb2_next_header,
5593         .ioctl_query_info = smb2_ioctl_query_info,
5594         .make_node = smb2_make_node,
5595         .fiemap = smb3_fiemap,
5596         .llseek = smb3_llseek,
5597         .is_status_io_timeout = smb2_is_status_io_timeout,
5598         .is_network_name_deleted = smb2_is_network_name_deleted,
5599 };
5600
5601 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
5602 struct smb_version_values smb20_values = {
5603         .version_string = SMB20_VERSION_STRING,
5604         .protocol_id = SMB20_PROT_ID,
5605         .req_capabilities = 0, /* MBZ */
5606         .large_lock_type = 0,
5607         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5608         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5609         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5610         .header_size = sizeof(struct smb2_hdr),
5611         .header_preamble_size = 0,
5612         .max_header_size = MAX_SMB2_HDR_SIZE,
5613         .read_rsp_size = sizeof(struct smb2_read_rsp),
5614         .lock_cmd = SMB2_LOCK,
5615         .cap_unix = 0,
5616         .cap_nt_find = SMB2_NT_FIND,
5617         .cap_large_files = SMB2_LARGE_FILES,
5618         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5619         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5620         .create_lease_size = sizeof(struct create_lease),
5621 };
5622 #endif /* ALLOW_INSECURE_LEGACY */
5623
5624 struct smb_version_values smb21_values = {
5625         .version_string = SMB21_VERSION_STRING,
5626         .protocol_id = SMB21_PROT_ID,
5627         .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
5628         .large_lock_type = 0,
5629         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5630         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5631         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5632         .header_size = sizeof(struct smb2_hdr),
5633         .header_preamble_size = 0,
5634         .max_header_size = MAX_SMB2_HDR_SIZE,
5635         .read_rsp_size = sizeof(struct smb2_read_rsp),
5636         .lock_cmd = SMB2_LOCK,
5637         .cap_unix = 0,
5638         .cap_nt_find = SMB2_NT_FIND,
5639         .cap_large_files = SMB2_LARGE_FILES,
5640         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5641         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5642         .create_lease_size = sizeof(struct create_lease),
5643 };
5644
5645 struct smb_version_values smb3any_values = {
5646         .version_string = SMB3ANY_VERSION_STRING,
5647         .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
5648         .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,
5649         .large_lock_type = 0,
5650         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5651         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5652         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5653         .header_size = sizeof(struct smb2_hdr),
5654         .header_preamble_size = 0,
5655         .max_header_size = MAX_SMB2_HDR_SIZE,
5656         .read_rsp_size = sizeof(struct smb2_read_rsp),
5657         .lock_cmd = SMB2_LOCK,
5658         .cap_unix = 0,
5659         .cap_nt_find = SMB2_NT_FIND,
5660         .cap_large_files = SMB2_LARGE_FILES,
5661         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5662         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5663         .create_lease_size = sizeof(struct create_lease_v2),
5664 };
5665
5666 struct smb_version_values smbdefault_values = {
5667         .version_string = SMBDEFAULT_VERSION_STRING,
5668         .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
5669         .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,
5670         .large_lock_type = 0,
5671         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5672         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5673         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5674         .header_size = sizeof(struct smb2_hdr),
5675         .header_preamble_size = 0,
5676         .max_header_size = MAX_SMB2_HDR_SIZE,
5677         .read_rsp_size = sizeof(struct smb2_read_rsp),
5678         .lock_cmd = SMB2_LOCK,
5679         .cap_unix = 0,
5680         .cap_nt_find = SMB2_NT_FIND,
5681         .cap_large_files = SMB2_LARGE_FILES,
5682         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5683         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5684         .create_lease_size = sizeof(struct create_lease_v2),
5685 };
5686
5687 struct smb_version_values smb30_values = {
5688         .version_string = SMB30_VERSION_STRING,
5689         .protocol_id = SMB30_PROT_ID,
5690         .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,
5691         .large_lock_type = 0,
5692         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5693         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5694         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5695         .header_size = sizeof(struct smb2_hdr),
5696         .header_preamble_size = 0,
5697         .max_header_size = MAX_SMB2_HDR_SIZE,
5698         .read_rsp_size = sizeof(struct smb2_read_rsp),
5699         .lock_cmd = SMB2_LOCK,
5700         .cap_unix = 0,
5701         .cap_nt_find = SMB2_NT_FIND,
5702         .cap_large_files = SMB2_LARGE_FILES,
5703         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5704         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5705         .create_lease_size = sizeof(struct create_lease_v2),
5706 };
5707
5708 struct smb_version_values smb302_values = {
5709         .version_string = SMB302_VERSION_STRING,
5710         .protocol_id = SMB302_PROT_ID,
5711         .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,
5712         .large_lock_type = 0,
5713         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5714         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5715         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5716         .header_size = sizeof(struct smb2_hdr),
5717         .header_preamble_size = 0,
5718         .max_header_size = MAX_SMB2_HDR_SIZE,
5719         .read_rsp_size = sizeof(struct smb2_read_rsp),
5720         .lock_cmd = SMB2_LOCK,
5721         .cap_unix = 0,
5722         .cap_nt_find = SMB2_NT_FIND,
5723         .cap_large_files = SMB2_LARGE_FILES,
5724         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5725         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5726         .create_lease_size = sizeof(struct create_lease_v2),
5727 };
5728
5729 struct smb_version_values smb311_values = {
5730         .version_string = SMB311_VERSION_STRING,
5731         .protocol_id = SMB311_PROT_ID,
5732         .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,
5733         .large_lock_type = 0,
5734         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5735         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5736         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5737         .header_size = sizeof(struct smb2_hdr),
5738         .header_preamble_size = 0,
5739         .max_header_size = MAX_SMB2_HDR_SIZE,
5740         .read_rsp_size = sizeof(struct smb2_read_rsp),
5741         .lock_cmd = SMB2_LOCK,
5742         .cap_unix = 0,
5743         .cap_nt_find = SMB2_NT_FIND,
5744         .cap_large_files = SMB2_LARGE_FILES,
5745         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5746         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5747         .create_lease_size = sizeof(struct create_lease_v2),
5748 };