fs/cifs/smb2ops.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  *  SMB2 version specific operations
   4  *
   5  *  Copyright (c) 2012, Jeff Layton <jlayton@redhat.com>
   6  */
   7
   8 #include <linux/pagemap.h>
   9 #include <linux/vfs.h>
  10 #include <linux/falloc.h>
  11 #include <linux/scatterlist.h>
  12 #include <linux/uuid.h>
  13 #include <linux/sort.h>
  14 #include <crypto/aead.h>
  15 #include <linux/fiemap.h>
  16 #include "cifsfs.h"
  17 #include "cifsglob.h"
  18 #include "smb2pdu.h"
  19 #include "smb2proto.h"
  20 #include "cifsproto.h"
  21 #include "cifs_debug.h"
  22 #include "cifs_unicode.h"
  23 #include "smb2status.h"
  24 #include "smb2glob.h"
  25 #include "cifs_ioctl.h"
  26 #include "smbdirect.h"
  27
  28 /* Change credits for different ops and return the total number of credits */
  29 static int
  30 change_conf(struct TCP_Server_Info *server)
  31 {
  32         server->credits += server->echo_credits + server->oplock_credits;
  33         server->oplock_credits = server->echo_credits = 0;
  34         switch (server->credits) {
  35         case 0:
  36                 return 0;
  37         case 1:
  38                 server->echoes = false;
  39                 server->oplocks = false;
  40                 break;
  41         case 2:
  42                 server->echoes = true;
  43                 server->oplocks = false;
  44                 server->echo_credits = 1;
  45                 break;
  46         default:
  47                 server->echoes = true;
  48                 if (enable_oplocks) {
  49                         server->oplocks = true;
  50                         server->oplock_credits = 1;
  51                 } else
  52                         server->oplocks = false;
  53
  54                 server->echo_credits = 1;
  55         }
  56         server->credits -= server->echo_credits + server->oplock_credits;
  57         return server->credits + server->echo_credits + server->oplock_credits;
  58 }
  59
  60 static void
  61 smb2_add_credits(struct TCP_Server_Info *server,
  62                  const struct cifs_credits *credits, const int optype)
  63 {
  64         int *val, rc = -1;
  65         unsigned int add = credits->value;
  66         unsigned int instance = credits->instance;
  67         bool reconnect_detected = false;
  68
  69         spin_lock(&server->req_lock);
  70         val = server->ops->get_credits_field(server, optype);
  71
  72         /* eg found case where write overlapping reconnect messed up credits */
  73         if (((optype & CIFS_OP_MASK) == CIFS_NEG_OP) && (*val != 0))
  74                 trace_smb3_reconnect_with_invalid_credits(server->CurrentMid,
  75                         server->hostname, *val, add);
  76         if ((instance == 0) || (instance == server->reconnect_instance))
  77                 *val += add;
  78         else
  79                 reconnect_detected = true;
  80
  81         if (*val > 65000) {
  82                 *val = 65000; /* Don't get near 64K credits, avoid srv bugs */
  83                 pr_warn_once("server overflowed SMB3 credits\n");
  84         }
  85         WARN_ON_ONCE(server->in_flight == 0);
  86         server->in_flight--;
  87         if (server->in_flight == 0 && (optype & CIFS_OP_MASK) != CIFS_NEG_OP)
  88                 rc = change_conf(server);
  89         /*
  90          * Sometimes server returns 0 credits on oplock break ack - we need to
  91          * rebalance credits in this case.
  92          */
  93         else if (server->in_flight > 0 && server->oplock_credits == 0 &&
  94                  server->oplocks) {
  95                 if (server->credits > 1) {
  96                         server->credits--;
  97                         server->oplock_credits++;
  98                 }
  99         }
 100         spin_unlock(&server->req_lock);
 101         wake_up(&server->request_q);
 102
 103         if (reconnect_detected)
 104                 cifs_dbg(FYI, "trying to put %d credits from the old server instance %d\n",
 105                          add, instance);
 106
 107         if (server->tcpStatus == CifsNeedReconnect
 108             || server->tcpStatus == CifsExiting)
 109                 return;
 110
 111         switch (rc) {
 112         case -1:
 113                 /* change_conf hasn't been executed */
 114                 break;
 115         case 0:
 116                 cifs_server_dbg(VFS, "Possible client or server bug - zero credits\n");
 117                 break;
 118         case 1:
 119                 cifs_server_dbg(VFS, "disabling echoes and oplocks\n");
 120                 break;
 121         case 2:
 122                 cifs_dbg(FYI, "disabling oplocks\n");
 123                 break;
 124         default:
 125                 trace_smb3_add_credits(server->CurrentMid,
 126                         server->hostname, rc, add);
 127                 cifs_dbg(FYI, "add %u credits total=%d\n", add, rc);
 128         }
 129 }
 130
 131 static void
 132 smb2_set_credits(struct TCP_Server_Info *server, const int val)
 133 {
 134         spin_lock(&server->req_lock);
 135         server->credits = val;
 136         if (val == 1)
 137                 server->reconnect_instance++;
 138         spin_unlock(&server->req_lock);
 139         /* don't log while holding the lock */
 140         if (val == 1)
 141                 cifs_dbg(FYI, "set credits to 1 due to smb2 reconnect\n");
 142 }
 143
 144 static int *
 145 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
 146 {
 147         switch (optype) {
 148         case CIFS_ECHO_OP:
 149                 return &server->echo_credits;
 150         case CIFS_OBREAK_OP:
 151                 return &server->oplock_credits;
 152         default:
 153                 return &server->credits;
 154         }
 155 }
 156
 157 static unsigned int
 158 smb2_get_credits(struct mid_q_entry *mid)
 159 {
 160         return mid->credits_received;
 161 }
 162
 163 static int
 164 smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
 165                       unsigned int *num, struct cifs_credits *credits)
 166 {
 167         int rc = 0;
 168         unsigned int scredits;
 169
 170         spin_lock(&server->req_lock);
 171         while (1) {
 172                 if (server->credits <= 0) {
 173                         spin_unlock(&server->req_lock);
 174                         cifs_num_waiters_inc(server);
 175                         rc = wait_event_killable(server->request_q,
 176                                 has_credits(server, &server->credits, 1));
 177                         cifs_num_waiters_dec(server);
 178                         if (rc)
 179                                 return rc;
 180                         spin_lock(&server->req_lock);
 181                 } else {
 182                         if (server->tcpStatus == CifsExiting) {
 183                                 spin_unlock(&server->req_lock);
 184                                 return -ENOENT;
 185                         }
 186
 187                         scredits = server->credits;
 188                         /* can deadlock with reopen */
 189                         if (scredits <= 8) {
 190                                 *num = SMB2_MAX_BUFFER_SIZE;
 191                                 credits->value = 0;
 192                                 credits->instance = 0;
 193                                 break;
 194                         }
 195
 196                         /* leave some credits for reopen and other ops */
 197                         scredits -= 8;
 198                         *num = min_t(unsigned int, size,
 199                                      scredits * SMB2_MAX_BUFFER_SIZE);
 200
 201                         credits->value =
 202                                 DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE);
 203                         credits->instance = server->reconnect_instance;
 204                         server->credits -= credits->value;
 205                         server->in_flight++;
 206                         if (server->in_flight > server->max_in_flight)
 207                                 server->max_in_flight = server->in_flight;
 208                         break;
 209                 }
 210         }
 211         spin_unlock(&server->req_lock);
 212         return rc;
 213 }
 214
 215 static int
 216 smb2_adjust_credits(struct TCP_Server_Info *server,
 217                     struct cifs_credits *credits,
 218                     const unsigned int payload_size)
 219 {
 220         int new_val = DIV_ROUND_UP(payload_size, SMB2_MAX_BUFFER_SIZE);
 221
 222         if (!credits->value || credits->value == new_val)
 223                 return 0;
 224
 225         if (credits->value < new_val) {
 226                 WARN_ONCE(1, "request has less credits (%d) than required (%d)",
 227                           credits->value, new_val);
 228                 return -ENOTSUPP;
 229         }
 230
 231         spin_lock(&server->req_lock);
 232
 233         if (server->reconnect_instance != credits->instance) {
 234                 spin_unlock(&server->req_lock);
 235                 cifs_server_dbg(VFS, "trying to return %d credits to old session\n",
 236                          credits->value - new_val);
 237                 return -EAGAIN;
 238         }
 239
 240         server->credits += credits->value - new_val;
 241         spin_unlock(&server->req_lock);
 242         wake_up(&server->request_q);
 243         credits->value = new_val;
 244         return 0;
 245 }
 246
 247 static __u64
 248 smb2_get_next_mid(struct TCP_Server_Info *server)
 249 {
 250         __u64 mid;
 251         /* for SMB2 we need the current value */
 252         spin_lock(&GlobalMid_Lock);
 253         mid = server->CurrentMid++;
 254         spin_unlock(&GlobalMid_Lock);
 255         return mid;
 256 }
 257
 258 static void
 259 smb2_revert_current_mid(struct TCP_Server_Info *server, const unsigned int val)
 260 {
 261         spin_lock(&GlobalMid_Lock);
 262         if (server->CurrentMid >= val)
 263                 server->CurrentMid -= val;
 264         spin_unlock(&GlobalMid_Lock);
 265 }
 266
 267 static struct mid_q_entry *
 268 __smb2_find_mid(struct TCP_Server_Info *server, char *buf, bool dequeue)
 269 {
 270         struct mid_q_entry *mid;
 271         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
 272         __u64 wire_mid = le64_to_cpu(shdr->MessageId);
 273
 274         if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
 275                 cifs_server_dbg(VFS, "Encrypted frame parsing not supported yet\n");
 276                 return NULL;
 277         }
 278
 279         spin_lock(&GlobalMid_Lock);
 280         list_for_each_entry(mid, &server->pending_mid_q, qhead) {
 281                 if ((mid->mid == wire_mid) &&
 282                     (mid->mid_state == MID_REQUEST_SUBMITTED) &&
 283                     (mid->command == shdr->Command)) {
 284                         kref_get(&mid->refcount);
 285                         if (dequeue) {
 286                                 list_del_init(&mid->qhead);
 287                                 mid->mid_flags |= MID_DELETED;
 288                         }
 289                         spin_unlock(&GlobalMid_Lock);
 290                         return mid;
 291                 }
 292         }
 293         spin_unlock(&GlobalMid_Lock);
 294         return NULL;
 295 }
 296
 297 static struct mid_q_entry *
 298 smb2_find_mid(struct TCP_Server_Info *server, char *buf)
 299 {
 300         return __smb2_find_mid(server, buf, false);
 301 }
 302
 303 static struct mid_q_entry *
 304 smb2_find_dequeue_mid(struct TCP_Server_Info *server, char *buf)
 305 {
 306         return __smb2_find_mid(server, buf, true);
 307 }
 308
 309 static void
 310 smb2_dump_detail(void *buf, struct TCP_Server_Info *server)
 311 {
 312 #ifdef CONFIG_CIFS_DEBUG2
 313         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
 314
 315         cifs_server_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
 316                  shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId,
 317                  shdr->ProcessId);
 318         cifs_server_dbg(VFS, "smb buf %p len %u\n", buf,
 319                  server->ops->calc_smb_size(buf, server));
 320 #endif
 321 }
 322
 323 static bool
 324 smb2_need_neg(struct TCP_Server_Info *server)
 325 {
 326         return server->max_read == 0;
 327 }
 328
 329 static int
 330 smb2_negotiate(const unsigned int xid, struct cifs_ses *ses)
 331 {
 332         int rc;
 333
 334         cifs_ses_server(ses)->CurrentMid = 0;
 335         rc = SMB2_negotiate(xid, ses);
 336         /* BB we probably don't need to retry with modern servers */
 337         if (rc == -EAGAIN)
 338                 rc = -EHOSTDOWN;
 339         return rc;
 340 }
 341
 342 static unsigned int
 343 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 344 {
 345         struct TCP_Server_Info *server = tcon->ses->server;
 346         unsigned int wsize;
 347
 348         /* start with specified wsize, or default */
 349         wsize = volume_info->wsize ? volume_info->wsize : CIFS_DEFAULT_IOSIZE;
 350         wsize = min_t(unsigned int, wsize, server->max_write);
 351         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 352                 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
 353
 354         return wsize;
 355 }
 356
 357 static unsigned int
 358 smb3_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 359 {
 360         struct TCP_Server_Info *server = tcon->ses->server;
 361         unsigned int wsize;
 362
 363         /* start with specified wsize, or default */
 364         wsize = volume_info->wsize ? volume_info->wsize : SMB3_DEFAULT_IOSIZE;
 365         wsize = min_t(unsigned int, wsize, server->max_write);
 366 #ifdef CONFIG_CIFS_SMB_DIRECT
 367         if (server->rdma) {
 368                 if (server->sign)
 369                         /*
 370                          * Account for SMB2 data transfer packet header and
 371                          * possible encryption header
 372                          */
 373                         wsize = min_t(unsigned int,
 374                                 wsize,
 375                                 server->smbd_conn->max_fragmented_send_size -
 376                                         SMB2_READWRITE_PDU_HEADER_SIZE -
 377                                         sizeof(struct smb2_transform_hdr));
 378                 else
 379                         wsize = min_t(unsigned int,
 380                                 wsize, server->smbd_conn->max_readwrite_size);
 381         }
 382 #endif
 383         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 384                 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
 385
 386         return wsize;
 387 }
 388
 389 static unsigned int
 390 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 391 {
 392         struct TCP_Server_Info *server = tcon->ses->server;
 393         unsigned int rsize;
 394
 395         /* start with specified rsize, or default */
 396         rsize = volume_info->rsize ? volume_info->rsize : CIFS_DEFAULT_IOSIZE;
 397         rsize = min_t(unsigned int, rsize, server->max_read);
 398
 399         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 400                 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
 401
 402         return rsize;
 403 }
 404
 405 static unsigned int
 406 smb3_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 407 {
 408         struct TCP_Server_Info *server = tcon->ses->server;
 409         unsigned int rsize;
 410
 411         /* start with specified rsize, or default */
 412         rsize = volume_info->rsize ? volume_info->rsize : SMB3_DEFAULT_IOSIZE;
 413         rsize = min_t(unsigned int, rsize, server->max_read);
 414 #ifdef CONFIG_CIFS_SMB_DIRECT
 415         if (server->rdma) {
 416                 if (server->sign)
 417                         /*
 418                          * Account for SMB2 data transfer packet header and
 419                          * possible encryption header
 420                          */
 421                         rsize = min_t(unsigned int,
 422                                 rsize,
 423                                 server->smbd_conn->max_fragmented_recv_size -
 424                                         SMB2_READWRITE_PDU_HEADER_SIZE -
 425                                         sizeof(struct smb2_transform_hdr));
 426                 else
 427                         rsize = min_t(unsigned int,
 428                                 rsize, server->smbd_conn->max_readwrite_size);
 429         }
 430 #endif
 431
 432         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 433                 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
 434
 435         return rsize;
 436 }
 437
 438 static int
 439 parse_server_interfaces(struct network_interface_info_ioctl_rsp *buf,
 440                         size_t buf_len,
 441                         struct cifs_server_iface **iface_list,
 442                         size_t *iface_count)
 443 {
 444         struct network_interface_info_ioctl_rsp *p;
 445         struct sockaddr_in *addr4;
 446         struct sockaddr_in6 *addr6;
 447         struct iface_info_ipv4 *p4;
 448         struct iface_info_ipv6 *p6;
 449         struct cifs_server_iface *info;
 450         ssize_t bytes_left;
 451         size_t next = 0;
 452         int nb_iface = 0;
 453         int rc = 0;
 454
 455         *iface_list = NULL;
 456         *iface_count = 0;
 457
 458         /*
 459          * Fist pass: count and sanity check
 460          */
 461
 462         bytes_left = buf_len;
 463         p = buf;
 464         while (bytes_left >= sizeof(*p)) {
 465                 nb_iface++;
 466                 next = le32_to_cpu(p->Next);
 467                 if (!next) {
 468                         bytes_left -= sizeof(*p);
 469                         break;
 470                 }
 471                 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
 472                 bytes_left -= next;
 473         }
 474
 475         if (!nb_iface) {
 476                 cifs_dbg(VFS, "%s: malformed interface info\n", __func__);
 477                 rc = -EINVAL;
 478                 goto out;
 479         }
 480
 481         /* Azure rounds the buffer size up 8, to a 16 byte boundary */
 482         if ((bytes_left > 8) || p->Next)
 483                 cifs_dbg(VFS, "%s: incomplete interface info\n", __func__);
 484
 485
 486         /*
 487          * Second pass: extract info to internal structure
 488          */
 489
 490         *iface_list = kcalloc(nb_iface, sizeof(**iface_list), GFP_KERNEL);
 491         if (!*iface_list) {
 492                 rc = -ENOMEM;
 493                 goto out;
 494         }
 495
 496         info = *iface_list;
 497         bytes_left = buf_len;
 498         p = buf;
 499         while (bytes_left >= sizeof(*p)) {
 500                 info->speed = le64_to_cpu(p->LinkSpeed);
 501                 info->rdma_capable = le32_to_cpu(p->Capability & RDMA_CAPABLE) ? 1 : 0;
 502                 info->rss_capable = le32_to_cpu(p->Capability & RSS_CAPABLE) ? 1 : 0;
 503
 504                 cifs_dbg(FYI, "%s: adding iface %zu\n", __func__, *iface_count);
 505                 cifs_dbg(FYI, "%s: speed %zu bps\n", __func__, info->speed);
 506                 cifs_dbg(FYI, "%s: capabilities 0x%08x\n", __func__,
 507                          le32_to_cpu(p->Capability));
 508
 509                 switch (p->Family) {
 510                 /*
 511                  * The kernel and wire socket structures have the same
 512                  * layout and use network byte order but make the
 513                  * conversion explicit in case either one changes.
 514                  */
 515                 case INTERNETWORK:
 516                         addr4 = (struct sockaddr_in *)&info->sockaddr;
 517                         p4 = (struct iface_info_ipv4 *)p->Buffer;
 518                         addr4->sin_family = AF_INET;
 519                         memcpy(&addr4->sin_addr, &p4->IPv4Address, 4);
 520
 521                         /* [MS-SMB2] 2.2.32.5.1.1 Clients MUST ignore these */
 522                         addr4->sin_port = cpu_to_be16(CIFS_PORT);
 523
 524                         cifs_dbg(FYI, "%s: ipv4 %pI4\n", __func__,
 525                                  &addr4->sin_addr);
 526                         break;
 527                 case INTERNETWORKV6:
 528                         addr6 = (struct sockaddr_in6 *)&info->sockaddr;
 529                         p6 = (struct iface_info_ipv6 *)p->Buffer;
 530                         addr6->sin6_family = AF_INET6;
 531                         memcpy(&addr6->sin6_addr, &p6->IPv6Address, 16);
 532
 533                         /* [MS-SMB2] 2.2.32.5.1.2 Clients MUST ignore these */
 534                         addr6->sin6_flowinfo = 0;
 535                         addr6->sin6_scope_id = 0;
 536                         addr6->sin6_port = cpu_to_be16(CIFS_PORT);
 537
 538                         cifs_dbg(FYI, "%s: ipv6 %pI6\n", __func__,
 539                                  &addr6->sin6_addr);
 540                         break;
 541                 default:
 542                         cifs_dbg(VFS,
 543                                  "%s: skipping unsupported socket family\n",
 544                                  __func__);
 545                         goto next_iface;
 546                 }
 547
 548                 (*iface_count)++;
 549                 info++;
 550 next_iface:
 551                 next = le32_to_cpu(p->Next);
 552                 if (!next)
 553                         break;
 554                 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
 555                 bytes_left -= next;
 556         }
 557
 558         if (!*iface_count) {
 559                 rc = -EINVAL;
 560                 goto out;
 561         }
 562
 563 out:
 564         if (rc) {
 565                 kfree(*iface_list);
 566                 *iface_count = 0;
 567                 *iface_list = NULL;
 568         }
 569         return rc;
 570 }
 571
 572 static int compare_iface(const void *ia, const void *ib)
 573 {
 574         const struct cifs_server_iface *a = (struct cifs_server_iface *)ia;
 575         const struct cifs_server_iface *b = (struct cifs_server_iface *)ib;
 576
 577         return a->speed == b->speed ? 0 : (a->speed > b->speed ? -1 : 1);
 578 }
 579
 580 static int
 581 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon)
 582 {
 583         int rc;
 584         unsigned int ret_data_len = 0;
 585         struct network_interface_info_ioctl_rsp *out_buf = NULL;
 586         struct cifs_server_iface *iface_list;
 587         size_t iface_count;
 588         struct cifs_ses *ses = tcon->ses;
 589
 590         rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
 591                         FSCTL_QUERY_NETWORK_INTERFACE_INFO,
 592                         NULL /* no data input */, 0 /* no data input */,
 593                         CIFSMaxBufSize, (char **)&out_buf, &ret_data_len);
 594         if (rc == -EOPNOTSUPP) {
 595                 cifs_dbg(FYI,
 596                          "server does not support query network interfaces\n");
 597                 ret_data_len = 0;
 598         } else if (rc != 0) {
 599                 cifs_tcon_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
 600                 goto out;
 601         }
 602
 603         rc = parse_server_interfaces(out_buf, ret_data_len,
 604                                      &iface_list, &iface_count);
 605         if (rc)
 606                 goto out;
 607
 608         /* sort interfaces from fastest to slowest */
 609         sort(iface_list, iface_count, sizeof(*iface_list), compare_iface, NULL);
 610
 611         spin_lock(&ses->iface_lock);
 612         kfree(ses->iface_list);
 613         ses->iface_list = iface_list;
 614         ses->iface_count = iface_count;
 615         ses->iface_last_update = jiffies;
 616         spin_unlock(&ses->iface_lock);
 617
 618 out:
 619         kfree(out_buf);
 620         return rc;
 621 }
 622
 623 static void
 624 smb2_close_cached_fid(struct kref *ref)
 625 {
 626         struct cached_fid *cfid = container_of(ref, struct cached_fid,
 627                                                refcount);
 628
 629         if (cfid->is_valid) {
 630                 cifs_dbg(FYI, "clear cached root file handle\n");
 631                 SMB2_close(0, cfid->tcon, cfid->fid->persistent_fid,
 632                            cfid->fid->volatile_fid);
 633                 cfid->is_valid = false;
 634                 cfid->file_all_info_is_valid = false;
 635                 cfid->has_lease = false;
 636         }
 637 }
 638
 639 void close_shroot(struct cached_fid *cfid)
 640 {
 641         mutex_lock(&cfid->fid_mutex);
 642         kref_put(&cfid->refcount, smb2_close_cached_fid);
 643         mutex_unlock(&cfid->fid_mutex);
 644 }
 645
 646 void close_shroot_lease_locked(struct cached_fid *cfid)
 647 {
 648         if (cfid->has_lease) {
 649                 cfid->has_lease = false;
 650                 kref_put(&cfid->refcount, smb2_close_cached_fid);
 651         }
 652 }
 653
 654 void close_shroot_lease(struct cached_fid *cfid)
 655 {
 656         mutex_lock(&cfid->fid_mutex);
 657         close_shroot_lease_locked(cfid);
 658         mutex_unlock(&cfid->fid_mutex);
 659 }
 660
 661 void
 662 smb2_cached_lease_break(struct work_struct *work)
 663 {
 664         struct cached_fid *cfid = container_of(work,
 665                                 struct cached_fid, lease_break);
 666
 667         close_shroot_lease(cfid);
 668 }
 669
 670 /*
 671  * Open the directory at the root of a share
 672  */
 673 int open_shroot(unsigned int xid, struct cifs_tcon *tcon,
 674                 struct cifs_sb_info *cifs_sb,
 675                 struct cached_fid **cfid)
 676 {
 677         struct cifs_ses *ses = tcon->ses;
 678         struct TCP_Server_Info *server = ses->server;
 679         struct cifs_open_parms oparms;
 680         struct smb2_create_rsp *o_rsp = NULL;
 681         struct smb2_query_info_rsp *qi_rsp = NULL;
 682         int resp_buftype[2];
 683         struct smb_rqst rqst[2];
 684         struct kvec rsp_iov[2];
 685         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
 686         struct kvec qi_iov[1];
 687         int rc, flags = 0;
 688         __le16 utf16_path = 0; /* Null - since an open of top of share */
 689         u8 oplock = SMB2_OPLOCK_LEVEL_II;
 690         struct cifs_fid *pfid;
 691
 692         mutex_lock(&tcon->crfid.fid_mutex);
 693         if (tcon->crfid.is_valid) {
 694                 cifs_dbg(FYI, "found a cached root file handle\n");
 695                 *cfid = &tcon->crfid;
 696                 kref_get(&tcon->crfid.refcount);
 697                 mutex_unlock(&tcon->crfid.fid_mutex);
 698                 return 0;
 699         }
 700
 701         /*
 702          * We do not hold the lock for the open because in case
 703          * SMB2_open needs to reconnect, it will end up calling
 704          * cifs_mark_open_files_invalid() which takes the lock again
 705          * thus causing a deadlock
 706          */
 707
 708         mutex_unlock(&tcon->crfid.fid_mutex);
 709
 710         if (smb3_encryption_required(tcon))
 711                 flags |= CIFS_TRANSFORM_REQ;
 712
 713         if (!server->ops->new_lease_key)
 714                 return -EIO;
 715
 716         pfid = tcon->crfid.fid;
 717         server->ops->new_lease_key(pfid);
 718
 719         memset(rqst, 0, sizeof(rqst));
 720         resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER;
 721         memset(rsp_iov, 0, sizeof(rsp_iov));
 722
 723         /* Open */
 724         memset(&open_iov, 0, sizeof(open_iov));
 725         rqst[0].rq_iov = open_iov;
 726         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
 727
 728         oparms.tcon = tcon;
 729         oparms.create_options = cifs_create_options(cifs_sb, 0);
 730         oparms.desired_access = FILE_READ_ATTRIBUTES;
 731         oparms.disposition = FILE_OPEN;
 732         oparms.fid = pfid;
 733         oparms.reconnect = false;
 734
 735         rc = SMB2_open_init(tcon, server,
 736                             &rqst[0], &oplock, &oparms, &utf16_path);
 737         if (rc)
 738                 goto oshr_free;
 739         smb2_set_next_command(tcon, &rqst[0]);
 740
 741         memset(&qi_iov, 0, sizeof(qi_iov));
 742         rqst[1].rq_iov = qi_iov;
 743         rqst[1].rq_nvec = 1;
 744
 745         rc = SMB2_query_info_init(tcon, server,
 746                                   &rqst[1], COMPOUND_FID,
 747                                   COMPOUND_FID, FILE_ALL_INFORMATION,
 748                                   SMB2_O_INFO_FILE, 0,
 749                                   sizeof(struct smb2_file_all_info) +
 750                                   PATH_MAX * 2, 0, NULL);
 751         if (rc)
 752                 goto oshr_free;
 753
 754         smb2_set_related(&rqst[1]);
 755
 756         rc = compound_send_recv(xid, ses, server,
 757                                 flags, 2, rqst,
 758                                 resp_buftype, rsp_iov);
 759         mutex_lock(&tcon->crfid.fid_mutex);
 760
 761         /*
 762          * Now we need to check again as the cached root might have
 763          * been successfully re-opened from a concurrent process
 764          */
 765
 766         if (tcon->crfid.is_valid) {
 767                 /* work was already done */
 768
 769                 /* stash fids for close() later */
 770                 struct cifs_fid fid = {
 771                         .persistent_fid = pfid->persistent_fid,
 772                         .volatile_fid = pfid->volatile_fid,
 773                 };
 774
 775                 /*
 776                  * caller expects this func to set pfid to a valid
 777                  * cached root, so we copy the existing one and get a
 778                  * reference.
 779                  */
 780                 memcpy(pfid, tcon->crfid.fid, sizeof(*pfid));
 781                 kref_get(&tcon->crfid.refcount);
 782
 783                 mutex_unlock(&tcon->crfid.fid_mutex);
 784
 785                 if (rc == 0) {
 786                         /* close extra handle outside of crit sec */
 787                         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 788                 }
 789                 rc = 0;
 790                 goto oshr_free;
 791         }
 792
 793         /* Cached root is still invalid, continue normaly */
 794
 795         if (rc) {
 796                 if (rc == -EREMCHG) {
 797                         tcon->need_reconnect = true;
 798                         pr_warn_once("server share %s deleted\n",
 799                                      tcon->treeName);
 800                 }
 801                 goto oshr_exit;
 802         }
 803
 804         atomic_inc(&tcon->num_remote_opens);
 805
 806         o_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base;
 807         oparms.fid->persistent_fid = o_rsp->PersistentFileId;
 808         oparms.fid->volatile_fid = o_rsp->VolatileFileId;
 809 #ifdef CONFIG_CIFS_DEBUG2
 810         oparms.fid->mid = le64_to_cpu(o_rsp->sync_hdr.MessageId);
 811 #endif /* CIFS_DEBUG2 */
 812
 813         memcpy(tcon->crfid.fid, pfid, sizeof(struct cifs_fid));
 814         tcon->crfid.tcon = tcon;
 815         tcon->crfid.is_valid = true;
 816         kref_init(&tcon->crfid.refcount);
 817
 818         /* BB TBD check to see if oplock level check can be removed below */
 819         if (o_rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE) {
 820                 kref_get(&tcon->crfid.refcount);
 821                 tcon->crfid.has_lease = true;
 822                 rc = smb2_parse_contexts(server, rsp_iov,
 823                                 &oparms.fid->epoch,
 824                                     oparms.fid->lease_key, &oplock,
 825                                     NULL, NULL);
 826                 if (rc)
 827                         goto oshr_exit;
 828         } else
 829                 goto oshr_exit;
 830
 831         qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
 832         if (le32_to_cpu(qi_rsp->OutputBufferLength) < sizeof(struct smb2_file_all_info))
 833                 goto oshr_exit;
 834         if (!smb2_validate_and_copy_iov(
 835                                 le16_to_cpu(qi_rsp->OutputBufferOffset),
 836                                 sizeof(struct smb2_file_all_info),
 837                                 &rsp_iov[1], sizeof(struct smb2_file_all_info),
 838                                 (char *)&tcon->crfid.file_all_info))
 839                 tcon->crfid.file_all_info_is_valid = true;
 840
 841 oshr_exit:
 842         mutex_unlock(&tcon->crfid.fid_mutex);
 843 oshr_free:
 844         SMB2_open_free(&rqst[0]);
 845         SMB2_query_info_free(&rqst[1]);
 846         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
 847         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
 848         if (rc == 0)
 849                 *cfid = &tcon->crfid;
 850         return rc;
 851 }
 852
 853 static void
 854 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
 855               struct cifs_sb_info *cifs_sb)
 856 {
 857         int rc;
 858         __le16 srch_path = 0; /* Null - open root of share */
 859         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 860         struct cifs_open_parms oparms;
 861         struct cifs_fid fid;
 862         bool no_cached_open = tcon->nohandlecache;
 863         struct cached_fid *cfid = NULL;
 864
 865         oparms = (struct cifs_open_parms) {
 866                 .tcon = tcon,
 867                 .desired_access = FILE_READ_ATTRIBUTES,
 868                 .disposition = FILE_OPEN,
 869                 .create_options = cifs_create_options(cifs_sb, 0),
 870                 .fid = &fid,
 871         };
 872
 873         if (no_cached_open) {
 874                 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
 875                                NULL, NULL);
 876         } else {
 877                 rc = open_shroot(xid, tcon, cifs_sb, &cfid);
 878                 if (rc == 0)
 879                         memcpy(&fid, cfid->fid, sizeof(struct cifs_fid));
 880         }
 881         if (rc)
 882                 return;
 883
 884         SMB3_request_interfaces(xid, tcon);
 885
 886         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 887                         FS_ATTRIBUTE_INFORMATION);
 888         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 889                         FS_DEVICE_INFORMATION);
 890         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 891                         FS_VOLUME_INFORMATION);
 892         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 893                         FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
 894         if (no_cached_open)
 895                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 896         else
 897                 close_shroot(cfid);
 898 }
 899
 900 static void
 901 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
 902               struct cifs_sb_info *cifs_sb)
 903 {
 904         int rc;
 905         __le16 srch_path = 0; /* Null - open root of share */
 906         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 907         struct cifs_open_parms oparms;
 908         struct cifs_fid fid;
 909
 910         oparms.tcon = tcon;
 911         oparms.desired_access = FILE_READ_ATTRIBUTES;
 912         oparms.disposition = FILE_OPEN;
 913         oparms.create_options = cifs_create_options(cifs_sb, 0);
 914         oparms.fid = &fid;
 915         oparms.reconnect = false;
 916
 917         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
 918                        NULL, NULL);
 919         if (rc)
 920                 return;
 921
 922         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 923                         FS_ATTRIBUTE_INFORMATION);
 924         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 925                         FS_DEVICE_INFORMATION);
 926         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 927 }
 928
 929 static int
 930 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
 931                         struct cifs_sb_info *cifs_sb, const char *full_path)
 932 {
 933         int rc;
 934         __le16 *utf16_path;
 935         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 936         struct cifs_open_parms oparms;
 937         struct cifs_fid fid;
 938
 939         if ((*full_path == 0) && tcon->crfid.is_valid)
 940                 return 0;
 941
 942         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
 943         if (!utf16_path)
 944                 return -ENOMEM;
 945
 946         oparms.tcon = tcon;
 947         oparms.desired_access = FILE_READ_ATTRIBUTES;
 948         oparms.disposition = FILE_OPEN;
 949         oparms.create_options = cifs_create_options(cifs_sb, 0);
 950         oparms.fid = &fid;
 951         oparms.reconnect = false;
 952
 953         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
 954                        NULL);
 955         if (rc) {
 956                 kfree(utf16_path);
 957                 return rc;
 958         }
 959
 960         rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 961         kfree(utf16_path);
 962         return rc;
 963 }
 964
 965 static int
 966 smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
 967                   struct cifs_sb_info *cifs_sb, const char *full_path,
 968                   u64 *uniqueid, FILE_ALL_INFO *data)
 969 {
 970         *uniqueid = le64_to_cpu(data->IndexNumber);
 971         return 0;
 972 }
 973
 974 static int
 975 smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
 976                      struct cifs_fid *fid, FILE_ALL_INFO *data)
 977 {
 978         int rc;
 979         struct smb2_file_all_info *smb2_data;
 980
 981         smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
 982                             GFP_KERNEL);
 983         if (smb2_data == NULL)
 984                 return -ENOMEM;
 985
 986         rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid,
 987                              smb2_data);
 988         if (!rc)
 989                 move_smb2_info_to_cifs(data, smb2_data);
 990         kfree(smb2_data);
 991         return rc;
 992 }
 993
 994 #ifdef CONFIG_CIFS_XATTR
 995 static ssize_t
 996 move_smb2_ea_to_cifs(char *dst, size_t dst_size,
 997                      struct smb2_file_full_ea_info *src, size_t src_size,
 998                      const unsigned char *ea_name)
 999 {
1000         int rc = 0;
1001         unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0;
1002         char *name, *value;
1003         size_t buf_size = dst_size;
1004         size_t name_len, value_len, user_name_len;
1005
1006         while (src_size > 0) {
1007                 name_len = (size_t)src->ea_name_length;
1008                 value_len = (size_t)le16_to_cpu(src->ea_value_length);
1009
1010                 if (name_len == 0)
1011                         break;
1012
1013                 if (src_size < 8 + name_len + 1 + value_len) {
1014                         cifs_dbg(FYI, "EA entry goes beyond length of list\n");
1015                         rc = -EIO;
1016                         goto out;
1017                 }
1018
1019                 name = &src->ea_data[0];
1020                 value = &src->ea_data[src->ea_name_length + 1];
1021
1022                 if (ea_name) {
1023                         if (ea_name_len == name_len &&
1024                             memcmp(ea_name, name, name_len) == 0) {
1025                                 rc = value_len;
1026                                 if (dst_size == 0)
1027                                         goto out;
1028                                 if (dst_size < value_len) {
1029                                         rc = -ERANGE;
1030                                         goto out;
1031                                 }
1032                                 memcpy(dst, value, value_len);
1033                                 goto out;
1034                         }
1035                 } else {
1036                         /* 'user.' plus a terminating null */
1037                         user_name_len = 5 + 1 + name_len;
1038
1039                         if (buf_size == 0) {
1040                                 /* skip copy - calc size only */
1041                                 rc += user_name_len;
1042                         } else if (dst_size >= user_name_len) {
1043                                 dst_size -= user_name_len;
1044                                 memcpy(dst, "user.", 5);
1045                                 dst += 5;
1046                                 memcpy(dst, src->ea_data, name_len);
1047                                 dst += name_len;
1048                                 *dst = 0;
1049                                 ++dst;
1050                                 rc += user_name_len;
1051                         } else {
1052                                 /* stop before overrun buffer */
1053                                 rc = -ERANGE;
1054                                 break;
1055                         }
1056                 }
1057
1058                 if (!src->next_entry_offset)
1059                         break;
1060
1061                 if (src_size < le32_to_cpu(src->next_entry_offset)) {
1062                         /* stop before overrun buffer */
1063                         rc = -ERANGE;
1064                         break;
1065                 }
1066                 src_size -= le32_to_cpu(src->next_entry_offset);
1067                 src = (void *)((char *)src +
1068                                le32_to_cpu(src->next_entry_offset));
1069         }
1070
1071         /* didn't find the named attribute */
1072         if (ea_name)
1073                 rc = -ENODATA;
1074
1075 out:
1076         return (ssize_t)rc;
1077 }
1078
1079 static ssize_t
1080 smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
1081                const unsigned char *path, const unsigned char *ea_name,
1082                char *ea_data, size_t buf_size,
1083                struct cifs_sb_info *cifs_sb)
1084 {
1085         int rc;
1086         __le16 *utf16_path;
1087         struct kvec rsp_iov = {NULL, 0};
1088         int buftype = CIFS_NO_BUFFER;
1089         struct smb2_query_info_rsp *rsp;
1090         struct smb2_file_full_ea_info *info = NULL;
1091
1092         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1093         if (!utf16_path)
1094                 return -ENOMEM;
1095
1096         rc = smb2_query_info_compound(xid, tcon, utf16_path,
1097                                       FILE_READ_EA,
1098                                       FILE_FULL_EA_INFORMATION,
1099                                       SMB2_O_INFO_FILE,
1100                                       CIFSMaxBufSize -
1101                                       MAX_SMB2_CREATE_RESPONSE_SIZE -
1102                                       MAX_SMB2_CLOSE_RESPONSE_SIZE,
1103                                       &rsp_iov, &buftype, cifs_sb);
1104         if (rc) {
1105                 /*
1106                  * If ea_name is NULL (listxattr) and there are no EAs,
1107                  * return 0 as it's not an error. Otherwise, the specified
1108                  * ea_name was not found.
1109                  */
1110                 if (!ea_name && rc == -ENODATA)
1111                         rc = 0;
1112                 goto qeas_exit;
1113         }
1114
1115         rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
1116         rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
1117                                le32_to_cpu(rsp->OutputBufferLength),
1118                                &rsp_iov,
1119                                sizeof(struct smb2_file_full_ea_info));
1120         if (rc)
1121                 goto qeas_exit;
1122
1123         info = (struct smb2_file_full_ea_info *)(
1124                         le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
1125         rc = move_smb2_ea_to_cifs(ea_data, buf_size, info,
1126                         le32_to_cpu(rsp->OutputBufferLength), ea_name);
1127
1128  qeas_exit:
1129         kfree(utf16_path);
1130         free_rsp_buf(buftype, rsp_iov.iov_base);
1131         return rc;
1132 }
1133
1134
1135 static int
1136 smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
1137             const char *path, const char *ea_name, const void *ea_value,
1138             const __u16 ea_value_len, const struct nls_table *nls_codepage,
1139             struct cifs_sb_info *cifs_sb)
1140 {
1141         struct cifs_ses *ses = tcon->ses;
1142         struct TCP_Server_Info *server = cifs_pick_channel(ses);
1143         __le16 *utf16_path = NULL;
1144         int ea_name_len = strlen(ea_name);
1145         int flags = CIFS_CP_CREATE_CLOSE_OP;
1146         int len;
1147         struct smb_rqst rqst[3];
1148         int resp_buftype[3];
1149         struct kvec rsp_iov[3];
1150         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
1151         struct cifs_open_parms oparms;
1152         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1153         struct cifs_fid fid;
1154         struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE];
1155         unsigned int size[1];
1156         void *data[1];
1157         struct smb2_file_full_ea_info *ea = NULL;
1158         struct kvec close_iov[1];
1159         struct smb2_query_info_rsp *rsp;
1160         int rc, used_len = 0;
1161
1162         if (smb3_encryption_required(tcon))
1163                 flags |= CIFS_TRANSFORM_REQ;
1164
1165         if (ea_name_len > 255)
1166                 return -EINVAL;
1167
1168         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1169         if (!utf16_path)
1170                 return -ENOMEM;
1171
1172         memset(rqst, 0, sizeof(rqst));
1173         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1174         memset(rsp_iov, 0, sizeof(rsp_iov));
1175
1176         if (ses->server->ops->query_all_EAs) {
1177                 if (!ea_value) {
1178                         rc = ses->server->ops->query_all_EAs(xid, tcon, path,
1179                                                              ea_name, NULL, 0,
1180                                                              cifs_sb);
1181                         if (rc == -ENODATA)
1182                                 goto sea_exit;
1183                 } else {
1184                         /* If we are adding a attribute we should first check
1185                          * if there will be enough space available to store
1186                          * the new EA. If not we should not add it since we
1187                          * would not be able to even read the EAs back.
1188                          */
1189                         rc = smb2_query_info_compound(xid, tcon, utf16_path,
1190                                       FILE_READ_EA,
1191                                       FILE_FULL_EA_INFORMATION,
1192                                       SMB2_O_INFO_FILE,
1193                                       CIFSMaxBufSize -
1194                                       MAX_SMB2_CREATE_RESPONSE_SIZE -
1195                                       MAX_SMB2_CLOSE_RESPONSE_SIZE,
1196                                       &rsp_iov[1], &resp_buftype[1], cifs_sb);
1197                         if (rc == 0) {
1198                                 rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1199                                 used_len = le32_to_cpu(rsp->OutputBufferLength);
1200                         }
1201                         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1202                         resp_buftype[1] = CIFS_NO_BUFFER;
1203                         memset(&rsp_iov[1], 0, sizeof(rsp_iov[1]));
1204                         rc = 0;
1205
1206                         /* Use a fudge factor of 256 bytes in case we collide
1207                          * with a different set_EAs command.
1208                          */
1209                         if(CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE -
1210                            MAX_SMB2_CLOSE_RESPONSE_SIZE - 256 <
1211                            used_len + ea_name_len + ea_value_len + 1) {
1212                                 rc = -ENOSPC;
1213                                 goto sea_exit;
1214                         }
1215                 }
1216         }
1217
1218         /* Open */
1219         memset(&open_iov, 0, sizeof(open_iov));
1220         rqst[0].rq_iov = open_iov;
1221         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1222
1223         memset(&oparms, 0, sizeof(oparms));
1224         oparms.tcon = tcon;
1225         oparms.desired_access = FILE_WRITE_EA;
1226         oparms.disposition = FILE_OPEN;
1227         oparms.create_options = cifs_create_options(cifs_sb, 0);
1228         oparms.fid = &fid;
1229         oparms.reconnect = false;
1230
1231         rc = SMB2_open_init(tcon, server,
1232                             &rqst[0], &oplock, &oparms, utf16_path);
1233         if (rc)
1234                 goto sea_exit;
1235         smb2_set_next_command(tcon, &rqst[0]);
1236
1237
1238         /* Set Info */
1239         memset(&si_iov, 0, sizeof(si_iov));
1240         rqst[1].rq_iov = si_iov;
1241         rqst[1].rq_nvec = 1;
1242
1243         len = sizeof(*ea) + ea_name_len + ea_value_len + 1;
1244         ea = kzalloc(len, GFP_KERNEL);
1245         if (ea == NULL) {
1246                 rc = -ENOMEM;
1247                 goto sea_exit;
1248         }
1249
1250         ea->ea_name_length = ea_name_len;
1251         ea->ea_value_length = cpu_to_le16(ea_value_len);
1252         memcpy(ea->ea_data, ea_name, ea_name_len + 1);
1253         memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len);
1254
1255         size[0] = len;
1256         data[0] = ea;
1257
1258         rc = SMB2_set_info_init(tcon, server,
1259                                 &rqst[1], COMPOUND_FID,
1260                                 COMPOUND_FID, current->tgid,
1261                                 FILE_FULL_EA_INFORMATION,
1262                                 SMB2_O_INFO_FILE, 0, data, size);
1263         if (rc)
1264                 goto sea_exit;
1265         smb2_set_next_command(tcon, &rqst[1]);
1266         smb2_set_related(&rqst[1]);
1267
1268
1269         /* Close */
1270         memset(&close_iov, 0, sizeof(close_iov));
1271         rqst[2].rq_iov = close_iov;
1272         rqst[2].rq_nvec = 1;
1273         rc = SMB2_close_init(tcon, server,
1274                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
1275         if (rc)
1276                 goto sea_exit;
1277         smb2_set_related(&rqst[2]);
1278
1279         rc = compound_send_recv(xid, ses, server,
1280                                 flags, 3, rqst,
1281                                 resp_buftype, rsp_iov);
1282         /* no need to bump num_remote_opens because handle immediately closed */
1283
1284  sea_exit:
1285         kfree(ea);
1286         kfree(utf16_path);
1287         SMB2_open_free(&rqst[0]);
1288         SMB2_set_info_free(&rqst[1]);
1289         SMB2_close_free(&rqst[2]);
1290         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1291         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1292         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1293         return rc;
1294 }
1295 #endif
1296
1297 static bool
1298 smb2_can_echo(struct TCP_Server_Info *server)
1299 {
1300         return server->echoes;
1301 }
1302
1303 static void
1304 smb2_clear_stats(struct cifs_tcon *tcon)
1305 {
1306         int i;
1307
1308         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
1309                 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
1310                 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
1311         }
1312 }
1313
1314 static void
1315 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
1316 {
1317         seq_puts(m, "\n\tShare Capabilities:");
1318         if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
1319                 seq_puts(m, " DFS,");
1320         if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
1321                 seq_puts(m, " CONTINUOUS AVAILABILITY,");
1322         if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
1323                 seq_puts(m, " SCALEOUT,");
1324         if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
1325                 seq_puts(m, " CLUSTER,");
1326         if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
1327                 seq_puts(m, " ASYMMETRIC,");
1328         if (tcon->capabilities == 0)
1329                 seq_puts(m, " None");
1330         if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
1331                 seq_puts(m, " Aligned,");
1332         if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
1333                 seq_puts(m, " Partition Aligned,");
1334         if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
1335                 seq_puts(m, " SSD,");
1336         if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
1337                 seq_puts(m, " TRIM-support,");
1338
1339         seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
1340         seq_printf(m, "\n\ttid: 0x%x", tcon->tid);
1341         if (tcon->perf_sector_size)
1342                 seq_printf(m, "\tOptimal sector size: 0x%x",
1343                            tcon->perf_sector_size);
1344         seq_printf(m, "\tMaximal Access: 0x%x", tcon->maximal_access);
1345 }
1346
1347 static void
1348 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
1349 {
1350         atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
1351         atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
1352
1353         /*
1354          *  Can't display SMB2_NEGOTIATE, SESSION_SETUP, LOGOFF, CANCEL and ECHO
1355          *  totals (requests sent) since those SMBs are per-session not per tcon
1356          */
1357         seq_printf(m, "\nBytes read: %llu  Bytes written: %llu",
1358                    (long long)(tcon->bytes_read),
1359                    (long long)(tcon->bytes_written));
1360         seq_printf(m, "\nOpen files: %d total (local), %d open on server",
1361                    atomic_read(&tcon->num_local_opens),
1362                    atomic_read(&tcon->num_remote_opens));
1363         seq_printf(m, "\nTreeConnects: %d total %d failed",
1364                    atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
1365                    atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
1366         seq_printf(m, "\nTreeDisconnects: %d total %d failed",
1367                    atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
1368                    atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
1369         seq_printf(m, "\nCreates: %d total %d failed",
1370                    atomic_read(&sent[SMB2_CREATE_HE]),
1371                    atomic_read(&failed[SMB2_CREATE_HE]));
1372         seq_printf(m, "\nCloses: %d total %d failed",
1373                    atomic_read(&sent[SMB2_CLOSE_HE]),
1374                    atomic_read(&failed[SMB2_CLOSE_HE]));
1375         seq_printf(m, "\nFlushes: %d total %d failed",
1376                    atomic_read(&sent[SMB2_FLUSH_HE]),
1377                    atomic_read(&failed[SMB2_FLUSH_HE]));
1378         seq_printf(m, "\nReads: %d total %d failed",
1379                    atomic_read(&sent[SMB2_READ_HE]),
1380                    atomic_read(&failed[SMB2_READ_HE]));
1381         seq_printf(m, "\nWrites: %d total %d failed",
1382                    atomic_read(&sent[SMB2_WRITE_HE]),
1383                    atomic_read(&failed[SMB2_WRITE_HE]));
1384         seq_printf(m, "\nLocks: %d total %d failed",
1385                    atomic_read(&sent[SMB2_LOCK_HE]),
1386                    atomic_read(&failed[SMB2_LOCK_HE]));
1387         seq_printf(m, "\nIOCTLs: %d total %d failed",
1388                    atomic_read(&sent[SMB2_IOCTL_HE]),
1389                    atomic_read(&failed[SMB2_IOCTL_HE]));
1390         seq_printf(m, "\nQueryDirectories: %d total %d failed",
1391                    atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
1392                    atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
1393         seq_printf(m, "\nChangeNotifies: %d total %d failed",
1394                    atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
1395                    atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
1396         seq_printf(m, "\nQueryInfos: %d total %d failed",
1397                    atomic_read(&sent[SMB2_QUERY_INFO_HE]),
1398                    atomic_read(&failed[SMB2_QUERY_INFO_HE]));
1399         seq_printf(m, "\nSetInfos: %d total %d failed",
1400                    atomic_read(&sent[SMB2_SET_INFO_HE]),
1401                    atomic_read(&failed[SMB2_SET_INFO_HE]));
1402         seq_printf(m, "\nOplockBreaks: %d sent %d failed",
1403                    atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
1404                    atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
1405 }
1406
1407 static void
1408 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
1409 {
1410         struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
1411         struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
1412
1413         cfile->fid.persistent_fid = fid->persistent_fid;
1414         cfile->fid.volatile_fid = fid->volatile_fid;
1415         cfile->fid.access = fid->access;
1416 #ifdef CONFIG_CIFS_DEBUG2
1417         cfile->fid.mid = fid->mid;
1418 #endif /* CIFS_DEBUG2 */
1419         server->ops->set_oplock_level(cinode, oplock, fid->epoch,
1420                                       &fid->purge_cache);
1421         cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
1422         memcpy(cfile->fid.create_guid, fid->create_guid, 16);
1423 }
1424
1425 static void
1426 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
1427                 struct cifs_fid *fid)
1428 {
1429         SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1430 }
1431
1432 static void
1433 smb2_close_getattr(const unsigned int xid, struct cifs_tcon *tcon,
1434                    struct cifsFileInfo *cfile)
1435 {
1436         struct smb2_file_network_open_info file_inf;
1437         struct inode *inode;
1438         int rc;
1439
1440         rc = __SMB2_close(xid, tcon, cfile->fid.persistent_fid,
1441                    cfile->fid.volatile_fid, &file_inf);
1442         if (rc)
1443                 return;
1444
1445         inode = d_inode(cfile->dentry);
1446
1447         spin_lock(&inode->i_lock);
1448         CIFS_I(inode)->time = jiffies;
1449
1450         /* Creation time should not need to be updated on close */
1451         if (file_inf.LastWriteTime)
1452                 inode->i_mtime = cifs_NTtimeToUnix(file_inf.LastWriteTime);
1453         if (file_inf.ChangeTime)
1454                 inode->i_ctime = cifs_NTtimeToUnix(file_inf.ChangeTime);
1455         if (file_inf.LastAccessTime)
1456                 inode->i_atime = cifs_NTtimeToUnix(file_inf.LastAccessTime);
1457
1458         /*
1459          * i_blocks is not related to (i_size / i_blksize),
1460          * but instead 512 byte (2**9) size is required for
1461          * calculating num blocks.
1462          */
1463         if (le64_to_cpu(file_inf.AllocationSize) > 4096)
1464                 inode->i_blocks =
1465                         (512 - 1 + le64_to_cpu(file_inf.AllocationSize)) >> 9;
1466
1467         /* End of file and Attributes should not have to be updated on close */
1468         spin_unlock(&inode->i_lock);
1469 }
1470
1471 static int
1472 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
1473                      u64 persistent_fid, u64 volatile_fid,
1474                      struct copychunk_ioctl *pcchunk)
1475 {
1476         int rc;
1477         unsigned int ret_data_len;
1478         struct resume_key_req *res_key;
1479
1480         rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
1481                         FSCTL_SRV_REQUEST_RESUME_KEY, NULL, 0 /* no input */,
1482                         CIFSMaxBufSize, (char **)&res_key, &ret_data_len);
1483
1484         if (rc) {
1485                 cifs_tcon_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
1486                 goto req_res_key_exit;
1487         }
1488         if (ret_data_len < sizeof(struct resume_key_req)) {
1489                 cifs_tcon_dbg(VFS, "Invalid refcopy resume key length\n");
1490                 rc = -EINVAL;
1491                 goto req_res_key_exit;
1492         }
1493         memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
1494
1495 req_res_key_exit:
1496         kfree(res_key);
1497         return rc;
1498 }
1499
1500 struct iqi_vars {
1501         struct smb_rqst rqst[3];
1502         struct kvec rsp_iov[3];
1503         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
1504         struct kvec qi_iov[1];
1505         struct kvec io_iov[SMB2_IOCTL_IOV_SIZE];
1506         struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE];
1507         struct kvec close_iov[1];
1508 };
1509
1510 static int
1511 smb2_ioctl_query_info(const unsigned int xid,
1512                       struct cifs_tcon *tcon,
1513                       struct cifs_sb_info *cifs_sb,
1514                       __le16 *path, int is_dir,
1515                       unsigned long p)
1516 {
1517         struct iqi_vars *vars;
1518         struct smb_rqst *rqst;
1519         struct kvec *rsp_iov;
1520         struct cifs_ses *ses = tcon->ses;
1521         struct TCP_Server_Info *server = cifs_pick_channel(ses);
1522         char __user *arg = (char __user *)p;
1523         struct smb_query_info qi;
1524         struct smb_query_info __user *pqi;
1525         int rc = 0;
1526         int flags = CIFS_CP_CREATE_CLOSE_OP;
1527         struct smb2_query_info_rsp *qi_rsp = NULL;
1528         struct smb2_ioctl_rsp *io_rsp = NULL;
1529         void *buffer = NULL;
1530         int resp_buftype[3];
1531         struct cifs_open_parms oparms;
1532         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1533         struct cifs_fid fid;
1534         unsigned int size[2];
1535         void *data[2];
1536         int create_options = is_dir ? CREATE_NOT_FILE : CREATE_NOT_DIR;
1537         void (*free_req1_func)(struct smb_rqst *r);
1538
1539         vars = kzalloc(sizeof(*vars), GFP_ATOMIC);
1540         if (vars == NULL)
1541                 return -ENOMEM;
1542         rqst = &vars->rqst[0];
1543         rsp_iov = &vars->rsp_iov[0];
1544
1545         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1546
1547         if (copy_from_user(&qi, arg, sizeof(struct smb_query_info))) {
1548                 rc = -EFAULT;
1549                 goto free_vars;
1550         }
1551         if (qi.output_buffer_length > 1024) {
1552                 rc = -EINVAL;
1553                 goto free_vars;
1554         }
1555
1556         if (!ses || !server) {
1557                 rc = -EIO;
1558                 goto free_vars;
1559         }
1560
1561         if (smb3_encryption_required(tcon))
1562                 flags |= CIFS_TRANSFORM_REQ;
1563
1564         if (qi.output_buffer_length) {
1565                 buffer = memdup_user(arg + sizeof(struct smb_query_info), qi.output_buffer_length);
1566                 if (IS_ERR(buffer)) {
1567                         rc = PTR_ERR(buffer);
1568                         goto free_vars;
1569                 }
1570         }
1571
1572         /* Open */
1573         rqst[0].rq_iov = &vars->open_iov[0];
1574         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1575
1576         memset(&oparms, 0, sizeof(oparms));
1577         oparms.tcon = tcon;
1578         oparms.disposition = FILE_OPEN;
1579         oparms.create_options = cifs_create_options(cifs_sb, create_options);
1580         oparms.fid = &fid;
1581         oparms.reconnect = false;
1582
1583         if (qi.flags & PASSTHRU_FSCTL) {
1584                 switch (qi.info_type & FSCTL_DEVICE_ACCESS_MASK) {
1585                 case FSCTL_DEVICE_ACCESS_FILE_READ_WRITE_ACCESS:
1586                         oparms.desired_access = FILE_READ_DATA | FILE_WRITE_DATA | FILE_READ_ATTRIBUTES | SYNCHRONIZE;
1587                         break;
1588                 case FSCTL_DEVICE_ACCESS_FILE_ANY_ACCESS:
1589                         oparms.desired_access = GENERIC_ALL;
1590                         break;
1591                 case FSCTL_DEVICE_ACCESS_FILE_READ_ACCESS:
1592                         oparms.desired_access = GENERIC_READ;
1593                         break;
1594                 case FSCTL_DEVICE_ACCESS_FILE_WRITE_ACCESS:
1595                         oparms.desired_access = GENERIC_WRITE;
1596                         break;
1597                 }
1598         } else if (qi.flags & PASSTHRU_SET_INFO) {
1599                 oparms.desired_access = GENERIC_WRITE;
1600         } else {
1601                 oparms.desired_access = FILE_READ_ATTRIBUTES | READ_CONTROL;
1602         }
1603
1604         rc = SMB2_open_init(tcon, server,
1605                             &rqst[0], &oplock, &oparms, path);
1606         if (rc)
1607                 goto free_output_buffer;
1608         smb2_set_next_command(tcon, &rqst[0]);
1609
1610         /* Query */
1611         if (qi.flags & PASSTHRU_FSCTL) {
1612                 /* Can eventually relax perm check since server enforces too */
1613                 if (!capable(CAP_SYS_ADMIN)) {
1614                         rc = -EPERM;
1615                         goto free_open_req;
1616                 }
1617                 rqst[1].rq_iov = &vars->io_iov[0];
1618                 rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
1619
1620                 rc = SMB2_ioctl_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID,
1621                                      qi.info_type, buffer, qi.output_buffer_length,
1622                                      CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE -
1623                                      MAX_SMB2_CLOSE_RESPONSE_SIZE);
1624                 free_req1_func = SMB2_ioctl_free;
1625         } else if (qi.flags == PASSTHRU_SET_INFO) {
1626                 /* Can eventually relax perm check since server enforces too */
1627                 if (!capable(CAP_SYS_ADMIN)) {
1628                         rc = -EPERM;
1629                         goto free_open_req;
1630                 }
1631                 if (qi.output_buffer_length < 8) {
1632                         rc = -EINVAL;
1633                         goto free_open_req;
1634                 }
1635                 rqst[1].rq_iov = &vars->si_iov[0];
1636                 rqst[1].rq_nvec = 1;
1637
1638                 /* MS-FSCC 2.4.13 FileEndOfFileInformation */
1639                 size[0] = 8;
1640                 data[0] = buffer;
1641
1642                 rc = SMB2_set_info_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID,
1643                                         current->tgid, FILE_END_OF_FILE_INFORMATION,
1644                                         SMB2_O_INFO_FILE, 0, data, size);
1645                 free_req1_func = SMB2_set_info_free;
1646         } else if (qi.flags == PASSTHRU_QUERY_INFO) {
1647                 rqst[1].rq_iov = &vars->qi_iov[0];
1648                 rqst[1].rq_nvec = 1;
1649
1650                 rc = SMB2_query_info_init(tcon, server,
1651                                   &rqst[1], COMPOUND_FID,
1652                                   COMPOUND_FID, qi.file_info_class,
1653                                   qi.info_type, qi.additional_information,
1654                                   qi.input_buffer_length,
1655                                   qi.output_buffer_length, buffer);
1656                 free_req1_func = SMB2_query_info_free;
1657         } else { /* unknown flags */
1658                 cifs_tcon_dbg(VFS, "Invalid passthru query flags: 0x%x\n",
1659                               qi.flags);
1660                 rc = -EINVAL;
1661         }
1662
1663         if (rc)
1664                 goto free_open_req;
1665         smb2_set_next_command(tcon, &rqst[1]);
1666         smb2_set_related(&rqst[1]);
1667
1668         /* Close */
1669         rqst[2].rq_iov = &vars->close_iov[0];
1670         rqst[2].rq_nvec = 1;
1671
1672         rc = SMB2_close_init(tcon, server,
1673                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
1674         if (rc)
1675                 goto free_req_1;
1676         smb2_set_related(&rqst[2]);
1677
1678         rc = compound_send_recv(xid, ses, server,
1679                                 flags, 3, rqst,
1680                                 resp_buftype, rsp_iov);
1681         if (rc)
1682                 goto out;
1683
1684         /* No need to bump num_remote_opens since handle immediately closed */
1685         if (qi.flags & PASSTHRU_FSCTL) {
1686                 pqi = (struct smb_query_info __user *)arg;
1687                 io_rsp = (struct smb2_ioctl_rsp *)rsp_iov[1].iov_base;
1688                 if (le32_to_cpu(io_rsp->OutputCount) < qi.input_buffer_length)
1689                         qi.input_buffer_length = le32_to_cpu(io_rsp->OutputCount);
1690                 if (qi.input_buffer_length > 0 &&
1691                     le32_to_cpu(io_rsp->OutputOffset) + qi.input_buffer_length
1692                     > rsp_iov[1].iov_len) {
1693                         rc = -EFAULT;
1694                         goto out;
1695                 }
1696
1697                 if (copy_to_user(&pqi->input_buffer_length,
1698                                  &qi.input_buffer_length,
1699                                  sizeof(qi.input_buffer_length))) {
1700                         rc = -EFAULT;
1701                         goto out;
1702                 }
1703
1704                 if (copy_to_user((void __user *)pqi + sizeof(struct smb_query_info),
1705                                  (const void *)io_rsp + le32_to_cpu(io_rsp->OutputOffset),
1706                                  qi.input_buffer_length))
1707                         rc = -EFAULT;
1708         } else {
1709                 pqi = (struct smb_query_info __user *)arg;
1710                 qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1711                 if (le32_to_cpu(qi_rsp->OutputBufferLength) < qi.input_buffer_length)
1712                         qi.input_buffer_length = le32_to_cpu(qi_rsp->OutputBufferLength);
1713                 if (copy_to_user(&pqi->input_buffer_length,
1714                                  &qi.input_buffer_length,
1715                                  sizeof(qi.input_buffer_length))) {
1716                         rc = -EFAULT;
1717                         goto out;
1718                 }
1719
1720                 if (copy_to_user(pqi + 1, qi_rsp->Buffer,
1721                                  qi.input_buffer_length))
1722                         rc = -EFAULT;
1723         }
1724
1725 out:
1726         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1727         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1728         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1729         SMB2_close_free(&rqst[2]);
1730 free_req_1:
1731         free_req1_func(&rqst[1]);
1732 free_open_req:
1733         SMB2_open_free(&rqst[0]);
1734 free_output_buffer:
1735         kfree(buffer);
1736 free_vars:
1737         kfree(vars);
1738         return rc;
1739 }
1740
1741 static ssize_t
1742 smb2_copychunk_range(const unsigned int xid,
1743                         struct cifsFileInfo *srcfile,
1744                         struct cifsFileInfo *trgtfile, u64 src_off,
1745                         u64 len, u64 dest_off)
1746 {
1747         int rc;
1748         unsigned int ret_data_len;
1749         struct copychunk_ioctl *pcchunk;
1750         struct copychunk_ioctl_rsp *retbuf = NULL;
1751         struct cifs_tcon *tcon;
1752         int chunks_copied = 0;
1753         bool chunk_sizes_updated = false;
1754         ssize_t bytes_written, total_bytes_written = 0;
1755         struct inode *inode;
1756
1757         pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
1758
1759         /*
1760          * We need to flush all unwritten data before we can send the
1761          * copychunk ioctl to the server.
1762          */
1763         inode = d_inode(trgtfile->dentry);
1764         filemap_write_and_wait(inode->i_mapping);
1765
1766         if (pcchunk == NULL)
1767                 return -ENOMEM;
1768
1769         cifs_dbg(FYI, "%s: about to call request res key\n", __func__);
1770         /* Request a key from the server to identify the source of the copy */
1771         rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
1772                                 srcfile->fid.persistent_fid,
1773                                 srcfile->fid.volatile_fid, pcchunk);
1774
1775         /* Note: request_res_key sets res_key null only if rc !=0 */
1776         if (rc)
1777                 goto cchunk_out;
1778
1779         /* For now array only one chunk long, will make more flexible later */
1780         pcchunk->ChunkCount = cpu_to_le32(1);
1781         pcchunk->Reserved = 0;
1782         pcchunk->Reserved2 = 0;
1783
1784         tcon = tlink_tcon(trgtfile->tlink);
1785
1786         while (len > 0) {
1787                 pcchunk->SourceOffset = cpu_to_le64(src_off);
1788                 pcchunk->TargetOffset = cpu_to_le64(dest_off);
1789                 pcchunk->Length =
1790                         cpu_to_le32(min_t(u64, len, tcon->max_bytes_chunk));
1791
1792                 /* Request server copy to target from src identified by key */
1793                 kfree(retbuf);
1794                 retbuf = NULL;
1795                 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1796                         trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
1797                         (char *)pcchunk, sizeof(struct copychunk_ioctl),
1798                         CIFSMaxBufSize, (char **)&retbuf, &ret_data_len);
1799                 if (rc == 0) {
1800                         if (ret_data_len !=
1801                                         sizeof(struct copychunk_ioctl_rsp)) {
1802                                 cifs_tcon_dbg(VFS, "Invalid cchunk response size\n");
1803                                 rc = -EIO;
1804                                 goto cchunk_out;
1805                         }
1806                         if (retbuf->TotalBytesWritten == 0) {
1807                                 cifs_dbg(FYI, "no bytes copied\n");
1808                                 rc = -EIO;
1809                                 goto cchunk_out;
1810                         }
1811                         /*
1812                          * Check if server claimed to write more than we asked
1813                          */
1814                         if (le32_to_cpu(retbuf->TotalBytesWritten) >
1815                             le32_to_cpu(pcchunk->Length)) {
1816                                 cifs_tcon_dbg(VFS, "Invalid copy chunk response\n");
1817                                 rc = -EIO;
1818                                 goto cchunk_out;
1819                         }
1820                         if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
1821                                 cifs_tcon_dbg(VFS, "Invalid num chunks written\n");
1822                                 rc = -EIO;
1823                                 goto cchunk_out;
1824                         }
1825                         chunks_copied++;
1826
1827                         bytes_written = le32_to_cpu(retbuf->TotalBytesWritten);
1828                         src_off += bytes_written;
1829                         dest_off += bytes_written;
1830                         len -= bytes_written;
1831                         total_bytes_written += bytes_written;
1832
1833                         cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n",
1834                                 le32_to_cpu(retbuf->ChunksWritten),
1835                                 le32_to_cpu(retbuf->ChunkBytesWritten),
1836                                 bytes_written);
1837                 } else if (rc == -EINVAL) {
1838                         if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
1839                                 goto cchunk_out;
1840
1841                         cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
1842                                 le32_to_cpu(retbuf->ChunksWritten),
1843                                 le32_to_cpu(retbuf->ChunkBytesWritten),
1844                                 le32_to_cpu(retbuf->TotalBytesWritten));
1845
1846                         /*
1847                          * Check if this is the first request using these sizes,
1848                          * (ie check if copy succeed once with original sizes
1849                          * and check if the server gave us different sizes after
1850                          * we already updated max sizes on previous request).
1851                          * if not then why is the server returning an error now
1852                          */
1853                         if ((chunks_copied != 0) || chunk_sizes_updated)
1854                                 goto cchunk_out;
1855
1856                         /* Check that server is not asking us to grow size */
1857                         if (le32_to_cpu(retbuf->ChunkBytesWritten) <
1858                                         tcon->max_bytes_chunk)
1859                                 tcon->max_bytes_chunk =
1860                                         le32_to_cpu(retbuf->ChunkBytesWritten);
1861                         else
1862                                 goto cchunk_out; /* server gave us bogus size */
1863
1864                         /* No need to change MaxChunks since already set to 1 */
1865                         chunk_sizes_updated = true;
1866                 } else
1867                         goto cchunk_out;
1868         }
1869
1870 cchunk_out:
1871         kfree(pcchunk);
1872         kfree(retbuf);
1873         if (rc)
1874                 return rc;
1875         else
1876                 return total_bytes_written;
1877 }
1878
1879 static int
1880 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
1881                 struct cifs_fid *fid)
1882 {
1883         return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1884 }
1885
1886 static unsigned int
1887 smb2_read_data_offset(char *buf)
1888 {
1889         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1890
1891         return rsp->DataOffset;
1892 }
1893
1894 static unsigned int
1895 smb2_read_data_length(char *buf, bool in_remaining)
1896 {
1897         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1898
1899         if (in_remaining)
1900                 return le32_to_cpu(rsp->DataRemaining);
1901
1902         return le32_to_cpu(rsp->DataLength);
1903 }
1904
1905
1906 static int
1907 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
1908                struct cifs_io_parms *parms, unsigned int *bytes_read,
1909                char **buf, int *buf_type)
1910 {
1911         parms->persistent_fid = pfid->persistent_fid;
1912         parms->volatile_fid = pfid->volatile_fid;
1913         return SMB2_read(xid, parms, bytes_read, buf, buf_type);
1914 }
1915
1916 static int
1917 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
1918                 struct cifs_io_parms *parms, unsigned int *written,
1919                 struct kvec *iov, unsigned long nr_segs)
1920 {
1921
1922         parms->persistent_fid = pfid->persistent_fid;
1923         parms->volatile_fid = pfid->volatile_fid;
1924         return SMB2_write(xid, parms, written, iov, nr_segs);
1925 }
1926
1927 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
1928 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
1929                 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
1930 {
1931         struct cifsInodeInfo *cifsi;
1932         int rc;
1933
1934         cifsi = CIFS_I(inode);
1935
1936         /* if file already sparse don't bother setting sparse again */
1937         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
1938                 return true; /* already sparse */
1939
1940         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
1941                 return true; /* already not sparse */
1942
1943         /*
1944          * Can't check for sparse support on share the usual way via the
1945          * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
1946          * since Samba server doesn't set the flag on the share, yet
1947          * supports the set sparse FSCTL and returns sparse correctly
1948          * in the file attributes. If we fail setting sparse though we
1949          * mark that server does not support sparse files for this share
1950          * to avoid repeatedly sending the unsupported fsctl to server
1951          * if the file is repeatedly extended.
1952          */
1953         if (tcon->broken_sparse_sup)
1954                 return false;
1955
1956         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1957                         cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
1958                         &setsparse, 1, CIFSMaxBufSize, NULL, NULL);
1959         if (rc) {
1960                 tcon->broken_sparse_sup = true;
1961                 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
1962                 return false;
1963         }
1964
1965         if (setsparse)
1966                 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
1967         else
1968                 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
1969
1970         return true;
1971 }
1972
1973 static int
1974 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
1975                    struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
1976 {
1977         __le64 eof = cpu_to_le64(size);
1978         struct inode *inode;
1979
1980         /*
1981          * If extending file more than one page make sparse. Many Linux fs
1982          * make files sparse by default when extending via ftruncate
1983          */
1984         inode = d_inode(cfile->dentry);
1985
1986         if (!set_alloc && (size > inode->i_size + 8192)) {
1987                 __u8 set_sparse = 1;
1988
1989                 /* whether set sparse succeeds or not, extend the file */
1990                 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
1991         }
1992
1993         return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
1994                             cfile->fid.volatile_fid, cfile->pid, &eof);
1995 }
1996
1997 static int
1998 smb2_duplicate_extents(const unsigned int xid,
1999                         struct cifsFileInfo *srcfile,
2000                         struct cifsFileInfo *trgtfile, u64 src_off,
2001                         u64 len, u64 dest_off)
2002 {
2003         int rc;
2004         unsigned int ret_data_len;
2005         struct inode *inode;
2006         struct duplicate_extents_to_file dup_ext_buf;
2007         struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
2008
2009         /* server fileays advertise duplicate extent support with this flag */
2010         if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
2011              FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
2012                 return -EOPNOTSUPP;
2013
2014         dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
2015         dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
2016         dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
2017         dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
2018         dup_ext_buf.ByteCount = cpu_to_le64(len);
2019         cifs_dbg(FYI, "Duplicate extents: src off %lld dst off %lld len %lld\n",
2020                 src_off, dest_off, len);
2021
2022         inode = d_inode(trgtfile->dentry);
2023         if (inode->i_size < dest_off + len) {
2024                 rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
2025                 if (rc)
2026                         goto duplicate_extents_out;
2027
2028                 /*
2029                  * Although also could set plausible allocation size (i_blocks)
2030                  * here in addition to setting the file size, in reflink
2031                  * it is likely that the target file is sparse. Its allocation
2032                  * size will be queried on next revalidate, but it is important
2033                  * to make sure that file's cached size is updated immediately
2034                  */
2035                 cifs_setsize(inode, dest_off + len);
2036         }
2037         rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
2038                         trgtfile->fid.volatile_fid,
2039                         FSCTL_DUPLICATE_EXTENTS_TO_FILE,
2040                         (char *)&dup_ext_buf,
2041                         sizeof(struct duplicate_extents_to_file),
2042                         CIFSMaxBufSize, NULL,
2043                         &ret_data_len);
2044
2045         if (ret_data_len > 0)
2046                 cifs_dbg(FYI, "Non-zero response length in duplicate extents\n");
2047
2048 duplicate_extents_out:
2049         return rc;
2050 }
2051
2052 static int
2053 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
2054                    struct cifsFileInfo *cfile)
2055 {
2056         return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
2057                             cfile->fid.volatile_fid);
2058 }
2059
2060 static int
2061 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
2062                    struct cifsFileInfo *cfile)
2063 {
2064         struct fsctl_set_integrity_information_req integr_info;
2065         unsigned int ret_data_len;
2066
2067         integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
2068         integr_info.Flags = 0;
2069         integr_info.Reserved = 0;
2070
2071         return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2072                         cfile->fid.volatile_fid,
2073                         FSCTL_SET_INTEGRITY_INFORMATION,
2074                         (char *)&integr_info,
2075                         sizeof(struct fsctl_set_integrity_information_req),
2076                         CIFSMaxBufSize, NULL,
2077                         &ret_data_len);
2078
2079 }
2080
2081 /* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */
2082 #define GMT_TOKEN_SIZE 50
2083
2084 #define MIN_SNAPSHOT_ARRAY_SIZE 16 /* See MS-SMB2 section 3.3.5.15.1 */
2085
2086 /*
2087  * Input buffer contains (empty) struct smb_snapshot array with size filled in
2088  * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2
2089  */
2090 static int
2091 smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
2092                    struct cifsFileInfo *cfile, void __user *ioc_buf)
2093 {
2094         char *retbuf = NULL;
2095         unsigned int ret_data_len = 0;
2096         int rc;
2097         u32 max_response_size;
2098         struct smb_snapshot_array snapshot_in;
2099
2100         /*
2101          * On the first query to enumerate the list of snapshots available
2102          * for this volume the buffer begins with 0 (number of snapshots
2103          * which can be returned is zero since at that point we do not know
2104          * how big the buffer needs to be). On the second query,
2105          * it (ret_data_len) is set to number of snapshots so we can
2106          * know to set the maximum response size larger (see below).
2107          */
2108         if (get_user(ret_data_len, (unsigned int __user *)ioc_buf))
2109                 return -EFAULT;
2110
2111         /*
2112          * Note that for snapshot queries that servers like Azure expect that
2113          * the first query be minimal size (and just used to get the number/size
2114          * of previous versions) so response size must be specified as EXACTLY
2115          * sizeof(struct snapshot_array) which is 16 when rounded up to multiple
2116          * of eight bytes.
2117          */
2118         if (ret_data_len == 0)
2119                 max_response_size = MIN_SNAPSHOT_ARRAY_SIZE;
2120         else
2121                 max_response_size = CIFSMaxBufSize;
2122
2123         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2124                         cfile->fid.volatile_fid,
2125                         FSCTL_SRV_ENUMERATE_SNAPSHOTS,
2126                         NULL, 0 /* no input data */, max_response_size,
2127                         (char **)&retbuf,
2128                         &ret_data_len);
2129         cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n",
2130                         rc, ret_data_len);
2131         if (rc)
2132                 return rc;
2133
2134         if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) {
2135                 /* Fixup buffer */
2136                 if (copy_from_user(&snapshot_in, ioc_buf,
2137                     sizeof(struct smb_snapshot_array))) {
2138                         rc = -EFAULT;
2139                         kfree(retbuf);
2140                         return rc;
2141                 }
2142
2143                 /*
2144                  * Check for min size, ie not large enough to fit even one GMT
2145                  * token (snapshot).  On the first ioctl some users may pass in
2146                  * smaller size (or zero) to simply get the size of the array
2147                  * so the user space caller can allocate sufficient memory
2148                  * and retry the ioctl again with larger array size sufficient
2149                  * to hold all of the snapshot GMT tokens on the second try.
2150                  */
2151                 if (snapshot_in.snapshot_array_size < GMT_TOKEN_SIZE)
2152                         ret_data_len = sizeof(struct smb_snapshot_array);
2153
2154                 /*
2155                  * We return struct SRV_SNAPSHOT_ARRAY, followed by
2156                  * the snapshot array (of 50 byte GMT tokens) each
2157                  * representing an available previous version of the data
2158                  */
2159                 if (ret_data_len > (snapshot_in.snapshot_array_size +
2160                                         sizeof(struct smb_snapshot_array)))
2161                         ret_data_len = snapshot_in.snapshot_array_size +
2162                                         sizeof(struct smb_snapshot_array);
2163
2164                 if (copy_to_user(ioc_buf, retbuf, ret_data_len))
2165                         rc = -EFAULT;
2166         }
2167
2168         kfree(retbuf);
2169         return rc;
2170 }
2171
2172
2173
2174 static int
2175 smb3_notify(const unsigned int xid, struct file *pfile,
2176             void __user *ioc_buf)
2177 {
2178         struct smb3_notify notify;
2179         struct dentry *dentry = pfile->f_path.dentry;
2180         struct inode *inode = file_inode(pfile);
2181         struct cifs_sb_info *cifs_sb;
2182         struct cifs_open_parms oparms;
2183         struct cifs_fid fid;
2184         struct cifs_tcon *tcon;
2185         unsigned char *path = NULL;
2186         __le16 *utf16_path = NULL;
2187         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2188         int rc = 0;
2189
2190         path = build_path_from_dentry(dentry);
2191         if (path == NULL)
2192                 return -ENOMEM;
2193
2194         cifs_sb = CIFS_SB(inode->i_sb);
2195
2196         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2197         if (utf16_path == NULL) {
2198                 rc = -ENOMEM;
2199                 goto notify_exit;
2200         }
2201
2202         if (copy_from_user(&notify, ioc_buf, sizeof(struct smb3_notify))) {
2203                 rc = -EFAULT;
2204                 goto notify_exit;
2205         }
2206
2207         tcon = cifs_sb_master_tcon(cifs_sb);
2208         oparms.tcon = tcon;
2209         oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
2210         oparms.disposition = FILE_OPEN;
2211         oparms.create_options = cifs_create_options(cifs_sb, 0);
2212         oparms.fid = &fid;
2213         oparms.reconnect = false;
2214
2215         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
2216                        NULL);
2217         if (rc)
2218                 goto notify_exit;
2219
2220         rc = SMB2_change_notify(xid, tcon, fid.persistent_fid, fid.volatile_fid,
2221                                 notify.watch_tree, notify.completion_filter);
2222
2223         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2224
2225         cifs_dbg(FYI, "change notify for path %s rc %d\n", path, rc);
2226
2227 notify_exit:
2228         kfree(path);
2229         kfree(utf16_path);
2230         return rc;
2231 }
2232
2233 static int
2234 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
2235                      const char *path, struct cifs_sb_info *cifs_sb,
2236                      struct cifs_fid *fid, __u16 search_flags,
2237                      struct cifs_search_info *srch_inf)
2238 {
2239         __le16 *utf16_path;
2240         struct smb_rqst rqst[2];
2241         struct kvec rsp_iov[2];
2242         int resp_buftype[2];
2243         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2244         struct kvec qd_iov[SMB2_QUERY_DIRECTORY_IOV_SIZE];
2245         int rc, flags = 0;
2246         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2247         struct cifs_open_parms oparms;
2248         struct smb2_query_directory_rsp *qd_rsp = NULL;
2249         struct smb2_create_rsp *op_rsp = NULL;
2250         struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
2251
2252         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2253         if (!utf16_path)
2254                 return -ENOMEM;
2255
2256         if (smb3_encryption_required(tcon))
2257                 flags |= CIFS_TRANSFORM_REQ;
2258
2259         memset(rqst, 0, sizeof(rqst));
2260         resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER;
2261         memset(rsp_iov, 0, sizeof(rsp_iov));
2262
2263         /* Open */
2264         memset(&open_iov, 0, sizeof(open_iov));
2265         rqst[0].rq_iov = open_iov;
2266         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2267
2268         oparms.tcon = tcon;
2269         oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
2270         oparms.disposition = FILE_OPEN;
2271         oparms.create_options = cifs_create_options(cifs_sb, 0);
2272         oparms.fid = fid;
2273         oparms.reconnect = false;
2274
2275         rc = SMB2_open_init(tcon, server,
2276                             &rqst[0], &oplock, &oparms, utf16_path);
2277         if (rc)
2278                 goto qdf_free;
2279         smb2_set_next_command(tcon, &rqst[0]);
2280
2281         /* Query directory */
2282         srch_inf->entries_in_buffer = 0;
2283         srch_inf->index_of_last_entry = 2;
2284
2285         memset(&qd_iov, 0, sizeof(qd_iov));
2286         rqst[1].rq_iov = qd_iov;
2287         rqst[1].rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE;
2288
2289         rc = SMB2_query_directory_init(xid, tcon, server,
2290                                        &rqst[1],
2291                                        COMPOUND_FID, COMPOUND_FID,
2292                                        0, srch_inf->info_level);
2293         if (rc)
2294                 goto qdf_free;
2295
2296         smb2_set_related(&rqst[1]);
2297
2298         rc = compound_send_recv(xid, tcon->ses, server,
2299                                 flags, 2, rqst,
2300                                 resp_buftype, rsp_iov);
2301
2302         /* If the open failed there is nothing to do */
2303         op_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base;
2304         if (op_rsp == NULL || op_rsp->sync_hdr.Status != STATUS_SUCCESS) {
2305                 cifs_dbg(FYI, "query_dir_first: open failed rc=%d\n", rc);
2306                 goto qdf_free;
2307         }
2308         fid->persistent_fid = op_rsp->PersistentFileId;
2309         fid->volatile_fid = op_rsp->VolatileFileId;
2310
2311         /* Anything else than ENODATA means a genuine error */
2312         if (rc && rc != -ENODATA) {
2313                 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2314                 cifs_dbg(FYI, "query_dir_first: query directory failed rc=%d\n", rc);
2315                 trace_smb3_query_dir_err(xid, fid->persistent_fid,
2316                                          tcon->tid, tcon->ses->Suid, 0, 0, rc);
2317                 goto qdf_free;
2318         }
2319
2320         atomic_inc(&tcon->num_remote_opens);
2321
2322         qd_rsp = (struct smb2_query_directory_rsp *)rsp_iov[1].iov_base;
2323         if (qd_rsp->sync_hdr.Status == STATUS_NO_MORE_FILES) {
2324                 trace_smb3_query_dir_done(xid, fid->persistent_fid,
2325                                           tcon->tid, tcon->ses->Suid, 0, 0);
2326                 srch_inf->endOfSearch = true;
2327                 rc = 0;
2328                 goto qdf_free;
2329         }
2330
2331         rc = smb2_parse_query_directory(tcon, &rsp_iov[1], resp_buftype[1],
2332                                         srch_inf);
2333         if (rc) {
2334                 trace_smb3_query_dir_err(xid, fid->persistent_fid, tcon->tid,
2335                         tcon->ses->Suid, 0, 0, rc);
2336                 goto qdf_free;
2337         }
2338         resp_buftype[1] = CIFS_NO_BUFFER;
2339
2340         trace_smb3_query_dir_done(xid, fid->persistent_fid, tcon->tid,
2341                         tcon->ses->Suid, 0, srch_inf->entries_in_buffer);
2342
2343  qdf_free:
2344         kfree(utf16_path);
2345         SMB2_open_free(&rqst[0]);
2346         SMB2_query_directory_free(&rqst[1]);
2347         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2348         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2349         return rc;
2350 }
2351
2352 static int
2353 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
2354                     struct cifs_fid *fid, __u16 search_flags,
2355                     struct cifs_search_info *srch_inf)
2356 {
2357         return SMB2_query_directory(xid, tcon, fid->persistent_fid,
2358                                     fid->volatile_fid, 0, srch_inf);
2359 }
2360
2361 static int
2362 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
2363                struct cifs_fid *fid)
2364 {
2365         return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2366 }
2367
2368 /*
2369  * If we negotiate SMB2 protocol and get STATUS_PENDING - update
2370  * the number of credits and return true. Otherwise - return false.
2371  */
2372 static bool
2373 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server)
2374 {
2375         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
2376
2377         if (shdr->Status != STATUS_PENDING)
2378                 return false;
2379
2380         if (shdr->CreditRequest) {
2381                 spin_lock(&server->req_lock);
2382                 server->credits += le16_to_cpu(shdr->CreditRequest);
2383                 spin_unlock(&server->req_lock);
2384                 wake_up(&server->request_q);
2385         }
2386
2387         return true;
2388 }
2389
2390 static bool
2391 smb2_is_session_expired(char *buf)
2392 {
2393         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
2394
2395         if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED &&
2396             shdr->Status != STATUS_USER_SESSION_DELETED)
2397                 return false;
2398
2399         trace_smb3_ses_expired(shdr->TreeId, shdr->SessionId,
2400                                le16_to_cpu(shdr->Command),
2401                                le64_to_cpu(shdr->MessageId));
2402         cifs_dbg(FYI, "Session expired or deleted\n");
2403
2404         return true;
2405 }
2406
2407 static bool
2408 smb2_is_status_io_timeout(char *buf)
2409 {
2410         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
2411
2412         if (shdr->Status == STATUS_IO_TIMEOUT)
2413                 return true;
2414         else
2415                 return false;
2416 }
2417
2418 static int
2419 smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
2420                      struct cifsInodeInfo *cinode)
2421 {
2422         if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
2423                 return SMB2_lease_break(0, tcon, cinode->lease_key,
2424                                         smb2_get_lease_state(cinode));
2425
2426         return SMB2_oplock_break(0, tcon, fid->persistent_fid,
2427                                  fid->volatile_fid,
2428                                  CIFS_CACHE_READ(cinode) ? 1 : 0);
2429 }
2430
2431 void
2432 smb2_set_related(struct smb_rqst *rqst)
2433 {
2434         struct smb2_sync_hdr *shdr;
2435
2436         shdr = (struct smb2_sync_hdr *)(rqst->rq_iov[0].iov_base);
2437         if (shdr == NULL) {
2438                 cifs_dbg(FYI, "shdr NULL in smb2_set_related\n");
2439                 return;
2440         }
2441         shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
2442 }
2443
2444 char smb2_padding[7] = {0, 0, 0, 0, 0, 0, 0};
2445
2446 void
2447 smb2_set_next_command(struct cifs_tcon *tcon, struct smb_rqst *rqst)
2448 {
2449         struct smb2_sync_hdr *shdr;
2450         struct cifs_ses *ses = tcon->ses;
2451         struct TCP_Server_Info *server = ses->server;
2452         unsigned long len = smb_rqst_len(server, rqst);
2453         int i, num_padding;
2454
2455         shdr = (struct smb2_sync_hdr *)(rqst->rq_iov[0].iov_base);
2456         if (shdr == NULL) {
2457                 cifs_dbg(FYI, "shdr NULL in smb2_set_next_command\n");
2458                 return;
2459         }
2460
2461         /* SMB headers in a compound are 8 byte aligned. */
2462
2463         /* No padding needed */
2464         if (!(len & 7))
2465                 goto finished;
2466
2467         num_padding = 8 - (len & 7);
2468         if (!smb3_encryption_required(tcon)) {
2469                 /*
2470                  * If we do not have encryption then we can just add an extra
2471                  * iov for the padding.
2472                  */
2473                 rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding;
2474                 rqst->rq_iov[rqst->rq_nvec].iov_len = num_padding;
2475                 rqst->rq_nvec++;
2476                 len += num_padding;
2477         } else {
2478                 /*
2479                  * We can not add a small padding iov for the encryption case
2480                  * because the encryption framework can not handle the padding
2481                  * iovs.
2482                  * We have to flatten this into a single buffer and add
2483                  * the padding to it.
2484                  */
2485                 for (i = 1; i < rqst->rq_nvec; i++) {
2486                         memcpy(rqst->rq_iov[0].iov_base +
2487                                rqst->rq_iov[0].iov_len,
2488                                rqst->rq_iov[i].iov_base,
2489                                rqst->rq_iov[i].iov_len);
2490                         rqst->rq_iov[0].iov_len += rqst->rq_iov[i].iov_len;
2491                 }
2492                 memset(rqst->rq_iov[0].iov_base + rqst->rq_iov[0].iov_len,
2493                        0, num_padding);
2494                 rqst->rq_iov[0].iov_len += num_padding;
2495                 len += num_padding;
2496                 rqst->rq_nvec = 1;
2497         }
2498
2499  finished:
2500         shdr->NextCommand = cpu_to_le32(len);
2501 }
2502
2503 /*
2504  * Passes the query info response back to the caller on success.
2505  * Caller need to free this with free_rsp_buf().
2506  */
2507 int
2508 smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon,
2509                          __le16 *utf16_path, u32 desired_access,
2510                          u32 class, u32 type, u32 output_len,
2511                          struct kvec *rsp, int *buftype,
2512                          struct cifs_sb_info *cifs_sb)
2513 {
2514         struct cifs_ses *ses = tcon->ses;
2515         struct TCP_Server_Info *server = cifs_pick_channel(ses);
2516         int flags = CIFS_CP_CREATE_CLOSE_OP;
2517         struct smb_rqst rqst[3];
2518         int resp_buftype[3];
2519         struct kvec rsp_iov[3];
2520         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2521         struct kvec qi_iov[1];
2522         struct kvec close_iov[1];
2523         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2524         struct cifs_open_parms oparms;
2525         struct cifs_fid fid;
2526         int rc;
2527
2528         if (smb3_encryption_required(tcon))
2529                 flags |= CIFS_TRANSFORM_REQ;
2530
2531         memset(rqst, 0, sizeof(rqst));
2532         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
2533         memset(rsp_iov, 0, sizeof(rsp_iov));
2534
2535         memset(&open_iov, 0, sizeof(open_iov));
2536         rqst[0].rq_iov = open_iov;
2537         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2538
2539         oparms.tcon = tcon;
2540         oparms.desired_access = desired_access;
2541         oparms.disposition = FILE_OPEN;
2542         oparms.create_options = cifs_create_options(cifs_sb, 0);
2543         oparms.fid = &fid;
2544         oparms.reconnect = false;
2545
2546         rc = SMB2_open_init(tcon, server,
2547                             &rqst[0], &oplock, &oparms, utf16_path);
2548         if (rc)
2549                 goto qic_exit;
2550         smb2_set_next_command(tcon, &rqst[0]);
2551
2552         memset(&qi_iov, 0, sizeof(qi_iov));
2553         rqst[1].rq_iov = qi_iov;
2554         rqst[1].rq_nvec = 1;
2555
2556         rc = SMB2_query_info_init(tcon, server,
2557                                   &rqst[1], COMPOUND_FID, COMPOUND_FID,
2558                                   class, type, 0,
2559                                   output_len, 0,
2560                                   NULL);
2561         if (rc)
2562                 goto qic_exit;
2563         smb2_set_next_command(tcon, &rqst[1]);
2564         smb2_set_related(&rqst[1]);
2565
2566         memset(&close_iov, 0, sizeof(close_iov));
2567         rqst[2].rq_iov = close_iov;
2568         rqst[2].rq_nvec = 1;
2569
2570         rc = SMB2_close_init(tcon, server,
2571                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
2572         if (rc)
2573                 goto qic_exit;
2574         smb2_set_related(&rqst[2]);
2575
2576         rc = compound_send_recv(xid, ses, server,
2577                                 flags, 3, rqst,
2578                                 resp_buftype, rsp_iov);
2579         if (rc) {
2580                 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2581                 if (rc == -EREMCHG) {
2582                         tcon->need_reconnect = true;
2583                         pr_warn_once("server share %s deleted\n",
2584                                      tcon->treeName);
2585                 }
2586                 goto qic_exit;
2587         }
2588         *rsp = rsp_iov[1];
2589         *buftype = resp_buftype[1];
2590
2591  qic_exit:
2592         SMB2_open_free(&rqst[0]);
2593         SMB2_query_info_free(&rqst[1]);
2594         SMB2_close_free(&rqst[2]);
2595         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2596         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
2597         return rc;
2598 }
2599
2600 static int
2601 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2602              struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
2603 {
2604         struct smb2_query_info_rsp *rsp;
2605         struct smb2_fs_full_size_info *info = NULL;
2606         __le16 utf16_path = 0; /* Null - open root of share */
2607         struct kvec rsp_iov = {NULL, 0};
2608         int buftype = CIFS_NO_BUFFER;
2609         int rc;
2610
2611
2612         rc = smb2_query_info_compound(xid, tcon, &utf16_path,
2613                                       FILE_READ_ATTRIBUTES,
2614                                       FS_FULL_SIZE_INFORMATION,
2615                                       SMB2_O_INFO_FILESYSTEM,
2616                                       sizeof(struct smb2_fs_full_size_info),
2617                                       &rsp_iov, &buftype, cifs_sb);
2618         if (rc)
2619                 goto qfs_exit;
2620
2621         rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
2622         buf->f_type = SMB2_MAGIC_NUMBER;
2623         info = (struct smb2_fs_full_size_info *)(
2624                 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
2625         rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
2626                                le32_to_cpu(rsp->OutputBufferLength),
2627                                &rsp_iov,
2628                                sizeof(struct smb2_fs_full_size_info));
2629         if (!rc)
2630                 smb2_copy_fs_info_to_kstatfs(info, buf);
2631
2632 qfs_exit:
2633         free_rsp_buf(buftype, rsp_iov.iov_base);
2634         return rc;
2635 }
2636
2637 static int
2638 smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2639                struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
2640 {
2641         int rc;
2642         __le16 srch_path = 0; /* Null - open root of share */
2643         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2644         struct cifs_open_parms oparms;
2645         struct cifs_fid fid;
2646
2647         if (!tcon->posix_extensions)
2648                 return smb2_queryfs(xid, tcon, cifs_sb, buf);
2649
2650         oparms.tcon = tcon;
2651         oparms.desired_access = FILE_READ_ATTRIBUTES;
2652         oparms.disposition = FILE_OPEN;
2653         oparms.create_options = cifs_create_options(cifs_sb, 0);
2654         oparms.fid = &fid;
2655         oparms.reconnect = false;
2656
2657         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
2658                        NULL, NULL);
2659         if (rc)
2660                 return rc;
2661
2662         rc = SMB311_posix_qfs_info(xid, tcon, fid.persistent_fid,
2663                                    fid.volatile_fid, buf);
2664         buf->f_type = SMB2_MAGIC_NUMBER;
2665         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2666         return rc;
2667 }
2668
2669 static bool
2670 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
2671 {
2672         return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
2673                ob1->fid.volatile_fid == ob2->fid.volatile_fid;
2674 }
2675
2676 static int
2677 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
2678                __u64 length, __u32 type, int lock, int unlock, bool wait)
2679 {
2680         if (unlock && !lock)
2681                 type = SMB2_LOCKFLAG_UNLOCK;
2682         return SMB2_lock(xid, tlink_tcon(cfile->tlink),
2683                          cfile->fid.persistent_fid, cfile->fid.volatile_fid,
2684                          current->tgid, length, offset, type, wait);
2685 }
2686
2687 static void
2688 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
2689 {
2690         memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
2691 }
2692
2693 static void
2694 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
2695 {
2696         memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
2697 }
2698
2699 static void
2700 smb2_new_lease_key(struct cifs_fid *fid)
2701 {
2702         generate_random_uuid(fid->lease_key);
2703 }
2704
2705 static int
2706 smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
2707                    const char *search_name,
2708                    struct dfs_info3_param **target_nodes,
2709                    unsigned int *num_of_nodes,
2710                    const struct nls_table *nls_codepage, int remap)
2711 {
2712         int rc;
2713         __le16 *utf16_path = NULL;
2714         int utf16_path_len = 0;
2715         struct cifs_tcon *tcon;
2716         struct fsctl_get_dfs_referral_req *dfs_req = NULL;
2717         struct get_dfs_referral_rsp *dfs_rsp = NULL;
2718         u32 dfs_req_size = 0, dfs_rsp_size = 0;
2719
2720         cifs_dbg(FYI, "%s: path: %s\n", __func__, search_name);
2721
2722         /*
2723          * Try to use the IPC tcon, otherwise just use any
2724          */
2725         tcon = ses->tcon_ipc;
2726         if (tcon == NULL) {
2727                 spin_lock(&cifs_tcp_ses_lock);
2728                 tcon = list_first_entry_or_null(&ses->tcon_list,
2729                                                 struct cifs_tcon,
2730                                                 tcon_list);
2731                 if (tcon)
2732                         tcon->tc_count++;
2733                 spin_unlock(&cifs_tcp_ses_lock);
2734         }
2735
2736         if (tcon == NULL) {
2737                 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n",
2738                          ses);
2739                 rc = -ENOTCONN;
2740                 goto out;
2741         }
2742
2743         utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX,
2744                                            &utf16_path_len,
2745                                            nls_codepage, remap);
2746         if (!utf16_path) {
2747                 rc = -ENOMEM;
2748                 goto out;
2749         }
2750
2751         dfs_req_size = sizeof(*dfs_req) + utf16_path_len;
2752         dfs_req = kzalloc(dfs_req_size, GFP_KERNEL);
2753         if (!dfs_req) {
2754                 rc = -ENOMEM;
2755                 goto out;
2756         }
2757
2758         /* Highest DFS referral version understood */
2759         dfs_req->MaxReferralLevel = DFS_VERSION;
2760
2761         /* Path to resolve in an UTF-16 null-terminated string */
2762         memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len);
2763
2764         do {
2765                 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
2766                                 FSCTL_DFS_GET_REFERRALS,
2767                                 (char *)dfs_req, dfs_req_size, CIFSMaxBufSize,
2768                                 (char **)&dfs_rsp, &dfs_rsp_size);
2769         } while (rc == -EAGAIN);
2770
2771         if (!rc && !dfs_rsp)
2772                 rc = -EIO;
2773         if (rc) {
2774                 if ((rc != -ENOENT) && (rc != -EOPNOTSUPP))
2775                         cifs_tcon_dbg(VFS, "ioctl error in %s rc=%d\n", __func__, rc);
2776                 goto out;
2777         }
2778
2779         rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size,
2780                                  num_of_nodes, target_nodes,
2781                                  nls_codepage, remap, search_name,
2782                                  true /* is_unicode */);
2783         if (rc) {
2784                 cifs_tcon_dbg(VFS, "parse error in %s rc=%d\n", __func__, rc);
2785                 goto out;
2786         }
2787
2788  out:
2789         if (tcon && !tcon->ipc) {
2790                 /* ipc tcons are not refcounted */
2791                 spin_lock(&cifs_tcp_ses_lock);
2792                 tcon->tc_count--;
2793                 spin_unlock(&cifs_tcp_ses_lock);
2794         }
2795         kfree(utf16_path);
2796         kfree(dfs_req);
2797         kfree(dfs_rsp);
2798         return rc;
2799 }
2800
2801 static int
2802 parse_reparse_posix(struct reparse_posix_data *symlink_buf,
2803                       u32 plen, char **target_path,
2804                       struct cifs_sb_info *cifs_sb)
2805 {
2806         unsigned int len;
2807
2808         /* See MS-FSCC 2.1.2.6 for the 'NFS' style reparse tags */
2809         len = le16_to_cpu(symlink_buf->ReparseDataLength);
2810
2811         if (le64_to_cpu(symlink_buf->InodeType) != NFS_SPECFILE_LNK) {
2812                 cifs_dbg(VFS, "%lld not a supported symlink type\n",
2813                         le64_to_cpu(symlink_buf->InodeType));
2814                 return -EOPNOTSUPP;
2815         }
2816
2817         *target_path = cifs_strndup_from_utf16(
2818                                 symlink_buf->PathBuffer,
2819                                 len, true, cifs_sb->local_nls);
2820         if (!(*target_path))
2821                 return -ENOMEM;
2822
2823         convert_delimiter(*target_path, '/');
2824         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
2825
2826         return 0;
2827 }
2828
2829 static int
2830 parse_reparse_symlink(struct reparse_symlink_data_buffer *symlink_buf,
2831                       u32 plen, char **target_path,
2832                       struct cifs_sb_info *cifs_sb)
2833 {
2834         unsigned int sub_len;
2835         unsigned int sub_offset;
2836
2837         /* We handle Symbolic Link reparse tag here. See: MS-FSCC 2.1.2.4 */
2838
2839         sub_offset = le16_to_cpu(symlink_buf->SubstituteNameOffset);
2840         sub_len = le16_to_cpu(symlink_buf->SubstituteNameLength);
2841         if (sub_offset + 20 > plen ||
2842             sub_offset + sub_len + 20 > plen) {
2843                 cifs_dbg(VFS, "srv returned malformed symlink buffer\n");
2844                 return -EIO;
2845         }
2846
2847         *target_path = cifs_strndup_from_utf16(
2848                                 symlink_buf->PathBuffer + sub_offset,
2849                                 sub_len, true, cifs_sb->local_nls);
2850         if (!(*target_path))
2851                 return -ENOMEM;
2852
2853         convert_delimiter(*target_path, '/');
2854         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
2855
2856         return 0;
2857 }
2858
2859 static int
2860 parse_reparse_point(struct reparse_data_buffer *buf,
2861                     u32 plen, char **target_path,
2862                     struct cifs_sb_info *cifs_sb)
2863 {
2864         if (plen < sizeof(struct reparse_data_buffer)) {
2865                 cifs_dbg(VFS, "reparse buffer is too small. Must be at least 8 bytes but was %d\n",
2866                          plen);
2867                 return -EIO;
2868         }
2869
2870         if (plen < le16_to_cpu(buf->ReparseDataLength) +
2871             sizeof(struct reparse_data_buffer)) {
2872                 cifs_dbg(VFS, "srv returned invalid reparse buf length: %d\n",
2873                          plen);
2874                 return -EIO;
2875         }
2876
2877         /* See MS-FSCC 2.1.2 */
2878         switch (le32_to_cpu(buf->ReparseTag)) {
2879         case IO_REPARSE_TAG_NFS:
2880                 return parse_reparse_posix(
2881                         (struct reparse_posix_data *)buf,
2882                         plen, target_path, cifs_sb);
2883         case IO_REPARSE_TAG_SYMLINK:
2884                 return parse_reparse_symlink(
2885                         (struct reparse_symlink_data_buffer *)buf,
2886                         plen, target_path, cifs_sb);
2887         default:
2888                 cifs_dbg(VFS, "srv returned unknown symlink buffer tag:0x%08x\n",
2889                          le32_to_cpu(buf->ReparseTag));
2890                 return -EOPNOTSUPP;
2891         }
2892 }
2893
2894 #define SMB2_SYMLINK_STRUCT_SIZE \
2895         (sizeof(struct smb2_err_rsp) - 1 + sizeof(struct smb2_symlink_err_rsp))
2896
2897 static int
2898 smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
2899                    struct cifs_sb_info *cifs_sb, const char *full_path,
2900                    char **target_path, bool is_reparse_point)
2901 {
2902         int rc;
2903         __le16 *utf16_path = NULL;
2904         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2905         struct cifs_open_parms oparms;
2906         struct cifs_fid fid;
2907         struct kvec err_iov = {NULL, 0};
2908         struct smb2_err_rsp *err_buf = NULL;
2909         struct smb2_symlink_err_rsp *symlink;
2910         struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
2911         unsigned int sub_len;
2912         unsigned int sub_offset;
2913         unsigned int print_len;
2914         unsigned int print_offset;
2915         int flags = CIFS_CP_CREATE_CLOSE_OP;
2916         struct smb_rqst rqst[3];
2917         int resp_buftype[3];
2918         struct kvec rsp_iov[3];
2919         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2920         struct kvec io_iov[SMB2_IOCTL_IOV_SIZE];
2921         struct kvec close_iov[1];
2922         struct smb2_create_rsp *create_rsp;
2923         struct smb2_ioctl_rsp *ioctl_rsp;
2924         struct reparse_data_buffer *reparse_buf;
2925         int create_options = is_reparse_point ? OPEN_REPARSE_POINT : 0;
2926         u32 plen;
2927
2928         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
2929
2930         *target_path = NULL;
2931
2932         if (smb3_encryption_required(tcon))
2933                 flags |= CIFS_TRANSFORM_REQ;
2934
2935         memset(rqst, 0, sizeof(rqst));
2936         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
2937         memset(rsp_iov, 0, sizeof(rsp_iov));
2938
2939         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
2940         if (!utf16_path)
2941                 return -ENOMEM;
2942
2943         /* Open */
2944         memset(&open_iov, 0, sizeof(open_iov));
2945         rqst[0].rq_iov = open_iov;
2946         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2947
2948         memset(&oparms, 0, sizeof(oparms));
2949         oparms.tcon = tcon;
2950         oparms.desired_access = FILE_READ_ATTRIBUTES;
2951         oparms.disposition = FILE_OPEN;
2952         oparms.create_options = cifs_create_options(cifs_sb, create_options);
2953         oparms.fid = &fid;
2954         oparms.reconnect = false;
2955
2956         rc = SMB2_open_init(tcon, server,
2957                             &rqst[0], &oplock, &oparms, utf16_path);
2958         if (rc)
2959                 goto querty_exit;
2960         smb2_set_next_command(tcon, &rqst[0]);
2961
2962
2963         /* IOCTL */
2964         memset(&io_iov, 0, sizeof(io_iov));
2965         rqst[1].rq_iov = io_iov;
2966         rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
2967
2968         rc = SMB2_ioctl_init(tcon, server,
2969                              &rqst[1], fid.persistent_fid,
2970                              fid.volatile_fid, FSCTL_GET_REPARSE_POINT, NULL, 0,
2971                              CIFSMaxBufSize -
2972                              MAX_SMB2_CREATE_RESPONSE_SIZE -
2973                              MAX_SMB2_CLOSE_RESPONSE_SIZE);
2974         if (rc)
2975                 goto querty_exit;
2976
2977         smb2_set_next_command(tcon, &rqst[1]);
2978         smb2_set_related(&rqst[1]);
2979
2980
2981         /* Close */
2982         memset(&close_iov, 0, sizeof(close_iov));
2983         rqst[2].rq_iov = close_iov;
2984         rqst[2].rq_nvec = 1;
2985
2986         rc = SMB2_close_init(tcon, server,
2987                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
2988         if (rc)
2989                 goto querty_exit;
2990
2991         smb2_set_related(&rqst[2]);
2992
2993         rc = compound_send_recv(xid, tcon->ses, server,
2994                                 flags, 3, rqst,
2995                                 resp_buftype, rsp_iov);
2996
2997         create_rsp = rsp_iov[0].iov_base;
2998         if (create_rsp && create_rsp->sync_hdr.Status)
2999                 err_iov = rsp_iov[0];
3000         ioctl_rsp = rsp_iov[1].iov_base;
3001
3002         /*
3003          * Open was successful and we got an ioctl response.
3004          */
3005         if ((rc == 0) && (is_reparse_point)) {
3006                 /* See MS-FSCC 2.3.23 */
3007
3008                 reparse_buf = (struct reparse_data_buffer *)
3009                         ((char *)ioctl_rsp +
3010                          le32_to_cpu(ioctl_rsp->OutputOffset));
3011                 plen = le32_to_cpu(ioctl_rsp->OutputCount);
3012
3013                 if (plen + le32_to_cpu(ioctl_rsp->OutputOffset) >
3014                     rsp_iov[1].iov_len) {
3015                         cifs_tcon_dbg(VFS, "srv returned invalid ioctl len: %d\n",
3016                                  plen);
3017                         rc = -EIO;
3018                         goto querty_exit;
3019                 }
3020
3021                 rc = parse_reparse_point(reparse_buf, plen, target_path,
3022                                          cifs_sb);
3023                 goto querty_exit;
3024         }
3025
3026         if (!rc || !err_iov.iov_base) {
3027                 rc = -ENOENT;
3028                 goto querty_exit;
3029         }
3030
3031         err_buf = err_iov.iov_base;
3032         if (le32_to_cpu(err_buf->ByteCount) < sizeof(struct smb2_symlink_err_rsp) ||
3033             err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE) {
3034                 rc = -EINVAL;
3035                 goto querty_exit;
3036         }
3037
3038         symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData;
3039         if (le32_to_cpu(symlink->SymLinkErrorTag) != SYMLINK_ERROR_TAG ||
3040             le32_to_cpu(symlink->ReparseTag) != IO_REPARSE_TAG_SYMLINK) {
3041                 rc = -EINVAL;
3042                 goto querty_exit;
3043         }
3044
3045         /* open must fail on symlink - reset rc */
3046         rc = 0;
3047         sub_len = le16_to_cpu(symlink->SubstituteNameLength);
3048         sub_offset = le16_to_cpu(symlink->SubstituteNameOffset);
3049         print_len = le16_to_cpu(symlink->PrintNameLength);
3050         print_offset = le16_to_cpu(symlink->PrintNameOffset);
3051
3052         if (err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE + sub_offset + sub_len) {
3053                 rc = -EINVAL;
3054                 goto querty_exit;
3055         }
3056
3057         if (err_iov.iov_len <
3058             SMB2_SYMLINK_STRUCT_SIZE + print_offset + print_len) {
3059                 rc = -EINVAL;
3060                 goto querty_exit;
3061         }
3062
3063         *target_path = cifs_strndup_from_utf16(
3064                                 (char *)symlink->PathBuffer + sub_offset,
3065                                 sub_len, true, cifs_sb->local_nls);
3066         if (!(*target_path)) {
3067                 rc = -ENOMEM;
3068                 goto querty_exit;
3069         }
3070         convert_delimiter(*target_path, '/');
3071         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
3072
3073  querty_exit:
3074         cifs_dbg(FYI, "query symlink rc %d\n", rc);
3075         kfree(utf16_path);
3076         SMB2_open_free(&rqst[0]);
3077         SMB2_ioctl_free(&rqst[1]);
3078         SMB2_close_free(&rqst[2]);
3079         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
3080         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
3081         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
3082         return rc;
3083 }
3084
3085 int
3086 smb2_query_reparse_tag(const unsigned int xid, struct cifs_tcon *tcon,
3087                    struct cifs_sb_info *cifs_sb, const char *full_path,
3088                    __u32 *tag)
3089 {
3090         int rc;
3091         __le16 *utf16_path = NULL;
3092         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3093         struct cifs_open_parms oparms;
3094         struct cifs_fid fid;
3095         struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
3096         int flags = CIFS_CP_CREATE_CLOSE_OP;
3097         struct smb_rqst rqst[3];
3098         int resp_buftype[3];
3099         struct kvec rsp_iov[3];
3100         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
3101         struct kvec io_iov[SMB2_IOCTL_IOV_SIZE];
3102         struct kvec close_iov[1];
3103         struct smb2_ioctl_rsp *ioctl_rsp;
3104         struct reparse_data_buffer *reparse_buf;
3105         u32 off, count, len;
3106
3107         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
3108
3109         if (smb3_encryption_required(tcon))
3110                 flags |= CIFS_TRANSFORM_REQ;
3111
3112         memset(rqst, 0, sizeof(rqst));
3113         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
3114         memset(rsp_iov, 0, sizeof(rsp_iov));
3115
3116         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
3117         if (!utf16_path)
3118                 return -ENOMEM;
3119
3120         /*
3121          * setup smb2open - TODO add optimization to call cifs_get_readable_path
3122          * to see if there is a handle already open that we can use
3123          */
3124         memset(&open_iov, 0, sizeof(open_iov));
3125         rqst[0].rq_iov = open_iov;
3126         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
3127
3128         memset(&oparms, 0, sizeof(oparms));
3129         oparms.tcon = tcon;
3130         oparms.desired_access = FILE_READ_ATTRIBUTES;
3131         oparms.disposition = FILE_OPEN;
3132         oparms.create_options = cifs_create_options(cifs_sb, OPEN_REPARSE_POINT);
3133         oparms.fid = &fid;
3134         oparms.reconnect = false;
3135
3136         rc = SMB2_open_init(tcon, server,
3137                             &rqst[0], &oplock, &oparms, utf16_path);
3138         if (rc)
3139                 goto query_rp_exit;
3140         smb2_set_next_command(tcon, &rqst[0]);
3141
3142
3143         /* IOCTL */
3144         memset(&io_iov, 0, sizeof(io_iov));
3145         rqst[1].rq_iov = io_iov;
3146         rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
3147
3148         rc = SMB2_ioctl_init(tcon, server,
3149                              &rqst[1], COMPOUND_FID,
3150                              COMPOUND_FID, FSCTL_GET_REPARSE_POINT, NULL, 0,
3151                              CIFSMaxBufSize -
3152                              MAX_SMB2_CREATE_RESPONSE_SIZE -
3153                              MAX_SMB2_CLOSE_RESPONSE_SIZE);
3154         if (rc)
3155                 goto query_rp_exit;
3156
3157         smb2_set_next_command(tcon, &rqst[1]);
3158         smb2_set_related(&rqst[1]);
3159
3160
3161         /* Close */
3162         memset(&close_iov, 0, sizeof(close_iov));
3163         rqst[2].rq_iov = close_iov;
3164         rqst[2].rq_nvec = 1;
3165
3166         rc = SMB2_close_init(tcon, server,
3167                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
3168         if (rc)
3169                 goto query_rp_exit;
3170
3171         smb2_set_related(&rqst[2]);
3172
3173         rc = compound_send_recv(xid, tcon->ses, server,
3174                                 flags, 3, rqst,
3175                                 resp_buftype, rsp_iov);
3176
3177         ioctl_rsp = rsp_iov[1].iov_base;
3178
3179         /*
3180          * Open was successful and we got an ioctl response.
3181          */
3182         if (rc == 0) {
3183                 /* See MS-FSCC 2.3.23 */
3184                 off = le32_to_cpu(ioctl_rsp->OutputOffset);
3185                 count = le32_to_cpu(ioctl_rsp->OutputCount);
3186                 if (check_add_overflow(off, count, &len) ||
3187                     len > rsp_iov[1].iov_len) {
3188                         cifs_tcon_dbg(VFS, "%s: invalid ioctl: off=%d count=%d\n",
3189                                       __func__, off, count);
3190                         rc = -EIO;
3191                         goto query_rp_exit;
3192                 }
3193
3194                 reparse_buf = (void *)((u8 *)ioctl_rsp + off);
3195                 len = sizeof(*reparse_buf);
3196                 if (count < len ||
3197                     count < le16_to_cpu(reparse_buf->ReparseDataLength) + len) {
3198                         cifs_tcon_dbg(VFS, "%s: invalid ioctl: off=%d count=%d\n",
3199                                       __func__, off, count);
3200                         rc = -EIO;
3201                         goto query_rp_exit;
3202                 }
3203                 *tag = le32_to_cpu(reparse_buf->ReparseTag);
3204         }
3205
3206  query_rp_exit:
3207         kfree(utf16_path);
3208         SMB2_open_free(&rqst[0]);
3209         SMB2_ioctl_free(&rqst[1]);
3210         SMB2_close_free(&rqst[2]);
3211         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
3212         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
3213         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
3214         return rc;
3215 }
3216
3217 static struct cifs_ntsd *
3218 get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb,
3219                 const struct cifs_fid *cifsfid, u32 *pacllen)
3220 {
3221         struct cifs_ntsd *pntsd = NULL;
3222         unsigned int xid;
3223         int rc = -EOPNOTSUPP;
3224         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3225
3226         if (IS_ERR(tlink))
3227                 return ERR_CAST(tlink);
3228
3229         xid = get_xid();
3230         cifs_dbg(FYI, "trying to get acl\n");
3231
3232         rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid,
3233                             cifsfid->volatile_fid, (void **)&pntsd, pacllen);
3234         free_xid(xid);
3235
3236         cifs_put_tlink(tlink);
3237
3238         cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
3239         if (rc)
3240                 return ERR_PTR(rc);
3241         return pntsd;
3242
3243 }
3244
3245 static struct cifs_ntsd *
3246 get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb,
3247                 const char *path, u32 *pacllen)
3248 {
3249         struct cifs_ntsd *pntsd = NULL;
3250         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3251         unsigned int xid;
3252         int rc;
3253         struct cifs_tcon *tcon;
3254         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3255         struct cifs_fid fid;
3256         struct cifs_open_parms oparms;
3257         __le16 *utf16_path;
3258
3259         cifs_dbg(FYI, "get smb3 acl for path %s\n", path);
3260         if (IS_ERR(tlink))
3261                 return ERR_CAST(tlink);
3262
3263         tcon = tlink_tcon(tlink);
3264         xid = get_xid();
3265
3266         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
3267         if (!utf16_path) {
3268                 rc = -ENOMEM;
3269                 free_xid(xid);
3270                 return ERR_PTR(rc);
3271         }
3272
3273         oparms.tcon = tcon;
3274         oparms.desired_access = READ_CONTROL;
3275         oparms.disposition = FILE_OPEN;
3276         /*
3277          * When querying an ACL, even if the file is a symlink we want to open
3278          * the source not the target, and so the protocol requires that the
3279          * client specify this flag when opening a reparse point
3280          */
3281         oparms.create_options = cifs_create_options(cifs_sb, 0) | OPEN_REPARSE_POINT;
3282         oparms.fid = &fid;
3283         oparms.reconnect = false;
3284
3285         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
3286                        NULL);
3287         kfree(utf16_path);
3288         if (!rc) {
3289                 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3290                             fid.volatile_fid, (void **)&pntsd, pacllen);
3291                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3292         }
3293
3294         cifs_put_tlink(tlink);
3295         free_xid(xid);
3296
3297         cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
3298         if (rc)
3299                 return ERR_PTR(rc);
3300         return pntsd;
3301 }
3302
3303 static int
3304 set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
3305                 struct inode *inode, const char *path, int aclflag)
3306 {
3307         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3308         unsigned int xid;
3309         int rc, access_flags = 0;
3310         struct cifs_tcon *tcon;
3311         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
3312         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3313         struct cifs_fid fid;
3314         struct cifs_open_parms oparms;
3315         __le16 *utf16_path;
3316
3317         cifs_dbg(FYI, "set smb3 acl for path %s\n", path);
3318         if (IS_ERR(tlink))
3319                 return PTR_ERR(tlink);
3320
3321         tcon = tlink_tcon(tlink);
3322         xid = get_xid();
3323
3324         if (aclflag == CIFS_ACL_OWNER || aclflag == CIFS_ACL_GROUP)
3325                 access_flags = WRITE_OWNER;
3326         else
3327                 access_flags = WRITE_DAC;
3328
3329         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
3330         if (!utf16_path) {
3331                 rc = -ENOMEM;
3332                 free_xid(xid);
3333                 return rc;
3334         }
3335
3336         oparms.tcon = tcon;
3337         oparms.desired_access = access_flags;
3338         oparms.create_options = cifs_create_options(cifs_sb, 0);
3339         oparms.disposition = FILE_OPEN;
3340         oparms.path = path;
3341         oparms.fid = &fid;
3342         oparms.reconnect = false;
3343
3344         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL,
3345                        NULL, NULL);
3346         kfree(utf16_path);
3347         if (!rc) {
3348                 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3349                             fid.volatile_fid, pnntsd, acllen, aclflag);
3350                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3351         }
3352
3353         cifs_put_tlink(tlink);
3354         free_xid(xid);
3355         return rc;
3356 }
3357
3358 /* Retrieve an ACL from the server */
3359 static struct cifs_ntsd *
3360 get_smb2_acl(struct cifs_sb_info *cifs_sb,
3361                                       struct inode *inode, const char *path,
3362                                       u32 *pacllen)
3363 {
3364         struct cifs_ntsd *pntsd = NULL;
3365         struct cifsFileInfo *open_file = NULL;
3366
3367         if (inode)
3368                 open_file = find_readable_file(CIFS_I(inode), true);
3369         if (!open_file)
3370                 return get_smb2_acl_by_path(cifs_sb, path, pacllen);
3371
3372         pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen);
3373         cifsFileInfo_put(open_file);
3374         return pntsd;
3375 }
3376
3377 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
3378                             loff_t offset, loff_t len, bool keep_size)
3379 {
3380         struct cifs_ses *ses = tcon->ses;
3381         struct inode *inode;
3382         struct cifsInodeInfo *cifsi;
3383         struct cifsFileInfo *cfile = file->private_data;
3384         struct file_zero_data_information fsctl_buf;
3385         long rc;
3386         unsigned int xid;
3387         __le64 eof;
3388
3389         xid = get_xid();
3390
3391         inode = d_inode(cfile->dentry);
3392         cifsi = CIFS_I(inode);
3393
3394         trace_smb3_zero_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3395                               ses->Suid, offset, len);
3396
3397         /*
3398          * We zero the range through ioctl, so we need remove the page caches
3399          * first, otherwise the data may be inconsistent with the server.
3400          */
3401         truncate_pagecache_range(inode, offset, offset + len - 1);
3402
3403         /* if file not oplocked can't be sure whether asking to extend size */
3404         if (!CIFS_CACHE_READ(cifsi))
3405                 if (keep_size == false) {
3406                         rc = -EOPNOTSUPP;
3407                         trace_smb3_zero_err(xid, cfile->fid.persistent_fid,
3408                                 tcon->tid, ses->Suid, offset, len, rc);
3409                         free_xid(xid);
3410                         return rc;
3411                 }
3412
3413         cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3414
3415         fsctl_buf.FileOffset = cpu_to_le64(offset);
3416         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3417
3418         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3419                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
3420                         (char *)&fsctl_buf,
3421                         sizeof(struct file_zero_data_information),
3422                         0, NULL, NULL);
3423         if (rc)
3424                 goto zero_range_exit;
3425
3426         /*
3427          * do we also need to change the size of the file?
3428          */
3429         if (keep_size == false && i_size_read(inode) < offset + len) {
3430                 eof = cpu_to_le64(offset + len);
3431                 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3432                                   cfile->fid.volatile_fid, cfile->pid, &eof);
3433         }
3434
3435  zero_range_exit:
3436         free_xid(xid);
3437         if (rc)
3438                 trace_smb3_zero_err(xid, cfile->fid.persistent_fid, tcon->tid,
3439                               ses->Suid, offset, len, rc);
3440         else
3441                 trace_smb3_zero_done(xid, cfile->fid.persistent_fid, tcon->tid,
3442                               ses->Suid, offset, len);
3443         return rc;
3444 }
3445
3446 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
3447                             loff_t offset, loff_t len)
3448 {
3449         struct inode *inode = file_inode(file);
3450         struct cifsFileInfo *cfile = file->private_data;
3451         struct file_zero_data_information fsctl_buf;
3452         long rc;
3453         unsigned int xid;
3454         __u8 set_sparse = 1;
3455
3456         xid = get_xid();
3457
3458         inode_lock(inode);
3459         /* Need to make file sparse, if not already, before freeing range. */
3460         /* Consider adding equivalent for compressed since it could also work */
3461         if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) {
3462                 rc = -EOPNOTSUPP;
3463                 goto out;
3464         }
3465
3466         /*
3467          * We implement the punch hole through ioctl, so we need remove the page
3468          * caches first, otherwise the data may be inconsistent with the server.
3469          */
3470         truncate_pagecache_range(inode, offset, offset + len - 1);
3471
3472         cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3473
3474         fsctl_buf.FileOffset = cpu_to_le64(offset);
3475         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3476
3477         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3478                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
3479                         (char *)&fsctl_buf,
3480                         sizeof(struct file_zero_data_information),
3481                         CIFSMaxBufSize, NULL, NULL);
3482 out:
3483         inode_unlock(inode);
3484         free_xid(xid);
3485         return rc;
3486 }
3487
3488 static int smb3_simple_fallocate_write_range(unsigned int xid,
3489                                              struct cifs_tcon *tcon,
3490                                              struct cifsFileInfo *cfile,
3491                                              loff_t off, loff_t len,
3492                                              char *buf)
3493 {
3494         struct cifs_io_parms io_parms = {0};
3495         int nbytes;
3496         int rc = 0;
3497         struct kvec iov[2];
3498
3499         io_parms.netfid = cfile->fid.netfid;
3500         io_parms.pid = current->tgid;
3501         io_parms.tcon = tcon;
3502         io_parms.persistent_fid = cfile->fid.persistent_fid;
3503         io_parms.volatile_fid = cfile->fid.volatile_fid;
3504
3505         while (len) {
3506                 io_parms.offset = off;
3507                 io_parms.length = len;
3508                 if (io_parms.length > SMB2_MAX_BUFFER_SIZE)
3509                         io_parms.length = SMB2_MAX_BUFFER_SIZE;
3510                 /* iov[0] is reserved for smb header */
3511                 iov[1].iov_base = buf;
3512                 iov[1].iov_len = io_parms.length;
3513                 rc = SMB2_write(xid, &io_parms, &nbytes, iov, 1);
3514                 if (rc)
3515                         break;
3516                 if (nbytes > len)
3517                         return -EINVAL;
3518                 buf += nbytes;
3519                 off += nbytes;
3520                 len -= nbytes;
3521         }
3522         return rc;
3523 }
3524
3525 static int smb3_simple_fallocate_range(unsigned int xid,
3526                                        struct cifs_tcon *tcon,
3527                                        struct cifsFileInfo *cfile,
3528                                        loff_t off, loff_t len)
3529 {
3530         struct file_allocated_range_buffer in_data, *out_data = NULL, *tmp_data;
3531         u32 out_data_len;
3532         char *buf = NULL;
3533         loff_t l;
3534         int rc;
3535
3536         in_data.file_offset = cpu_to_le64(off);
3537         in_data.length = cpu_to_le64(len);
3538         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3539                         cfile->fid.volatile_fid,
3540                         FSCTL_QUERY_ALLOCATED_RANGES,
3541                         (char *)&in_data, sizeof(in_data),
3542                         1024 * sizeof(struct file_allocated_range_buffer),
3543                         (char **)&out_data, &out_data_len);
3544         if (rc)
3545                 goto out;
3546
3547         buf = kzalloc(1024 * 1024, GFP_KERNEL);
3548         if (buf == NULL) {
3549                 rc = -ENOMEM;
3550                 goto out;
3551         }
3552
3553         tmp_data = out_data;
3554         while (len) {
3555                 /*
3556                  * The rest of the region is unmapped so write it all.
3557                  */
3558                 if (out_data_len == 0) {
3559                         rc = smb3_simple_fallocate_write_range(xid, tcon,
3560                                                cfile, off, len, buf);
3561                         goto out;
3562                 }
3563
3564                 if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3565                         rc = -EINVAL;
3566                         goto out;
3567                 }
3568
3569                 if (off < le64_to_cpu(tmp_data->file_offset)) {
3570                         /*
3571                          * We are at a hole. Write until the end of the region
3572                          * or until the next allocated data,
3573                          * whichever comes next.
3574                          */
3575                         l = le64_to_cpu(tmp_data->file_offset) - off;
3576                         if (len < l)
3577                                 l = len;
3578                         rc = smb3_simple_fallocate_write_range(xid, tcon,
3579                                                cfile, off, l, buf);
3580                         if (rc)
3581                                 goto out;
3582                         off = off + l;
3583                         len = len - l;
3584                         if (len == 0)
3585                                 goto out;
3586                 }
3587                 /*
3588                  * We are at a section of allocated data, just skip forward
3589                  * until the end of the data or the end of the region
3590                  * we are supposed to fallocate, whichever comes first.
3591                  */
3592                 l = le64_to_cpu(tmp_data->length);
3593                 if (len < l)
3594                         l = len;
3595                 off += l;
3596                 len -= l;
3597
3598                 tmp_data = &tmp_data[1];
3599                 out_data_len -= sizeof(struct file_allocated_range_buffer);
3600         }
3601
3602  out:
3603         kfree(out_data);
3604         kfree(buf);
3605         return rc;
3606 }
3607
3608
3609 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
3610                             loff_t off, loff_t len, bool keep_size)
3611 {
3612         struct inode *inode;
3613         struct cifsInodeInfo *cifsi;
3614         struct cifsFileInfo *cfile = file->private_data;
3615         long rc = -EOPNOTSUPP;
3616         unsigned int xid;
3617         __le64 eof;
3618
3619         xid = get_xid();
3620
3621         inode = d_inode(cfile->dentry);
3622         cifsi = CIFS_I(inode);
3623
3624         trace_smb3_falloc_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3625                                 tcon->ses->Suid, off, len);
3626         /* if file not oplocked can't be sure whether asking to extend size */
3627         if (!CIFS_CACHE_READ(cifsi))
3628                 if (keep_size == false) {
3629                         trace_smb3_falloc_err(xid, cfile->fid.persistent_fid,
3630                                 tcon->tid, tcon->ses->Suid, off, len, rc);
3631                         free_xid(xid);
3632                         return rc;
3633                 }
3634
3635         /*
3636          * Extending the file
3637          */
3638         if ((keep_size == false) && i_size_read(inode) < off + len) {
3639                 rc = inode_newsize_ok(inode, off + len);
3640                 if (rc)
3641                         goto out;
3642
3643                 if (cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)
3644                         smb2_set_sparse(xid, tcon, cfile, inode, false);
3645
3646                 eof = cpu_to_le64(off + len);
3647                 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3648                                   cfile->fid.volatile_fid, cfile->pid, &eof);
3649                 if (rc == 0) {
3650                         cifsi->server_eof = off + len;
3651                         cifs_setsize(inode, off + len);
3652                         cifs_truncate_page(inode->i_mapping, inode->i_size);
3653                         truncate_setsize(inode, off + len);
3654                 }
3655                 goto out;
3656         }
3657
3658         /*
3659          * Files are non-sparse by default so falloc may be a no-op
3660          * Must check if file sparse. If not sparse, and since we are not
3661          * extending then no need to do anything since file already allocated
3662          */
3663         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
3664                 rc = 0;
3665                 goto out;
3666         }
3667
3668         if (keep_size == true) {
3669                 /*
3670                  * We can not preallocate pages beyond the end of the file
3671                  * in SMB2
3672                  */
3673                 if (off >= i_size_read(inode)) {
3674                         rc = 0;
3675                         goto out;
3676                 }
3677                 /*
3678                  * For fallocates that are partially beyond the end of file,
3679                  * clamp len so we only fallocate up to the end of file.
3680                  */
3681                 if (off + len > i_size_read(inode)) {
3682                         len = i_size_read(inode) - off;
3683                 }
3684         }
3685
3686         if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
3687                 /*
3688                  * At this point, we are trying to fallocate an internal
3689                  * regions of a sparse file. Since smb2 does not have a
3690                  * fallocate command we have two otions on how to emulate this.
3691                  * We can either turn the entire file to become non-sparse
3692                  * which we only do if the fallocate is for virtually
3693                  * the whole file,  or we can overwrite the region with zeroes
3694                  * using SMB2_write, which could be prohibitevly expensive
3695                  * if len is large.
3696                  */
3697                 /*
3698                  * We are only trying to fallocate a small region so
3699                  * just write it with zero.
3700                  */
3701                 if (len <= 1024 * 1024) {
3702                         rc = smb3_simple_fallocate_range(xid, tcon, cfile,
3703                                                          off, len);
3704                         goto out;
3705                 }
3706
3707                 /*
3708                  * Check if falloc starts within first few pages of file
3709                  * and ends within a few pages of the end of file to
3710                  * ensure that most of file is being forced to be
3711                  * fallocated now. If so then setting whole file sparse
3712                  * ie potentially making a few extra pages at the beginning
3713                  * or end of the file non-sparse via set_sparse is harmless.
3714                  */
3715                 if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) {
3716                         rc = -EOPNOTSUPP;
3717                         goto out;
3718                 }
3719         }
3720
3721         smb2_set_sparse(xid, tcon, cfile, inode, false);
3722         rc = 0;
3723
3724 out:
3725         if (rc)
3726                 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid,
3727                                 tcon->ses->Suid, off, len, rc);
3728         else
3729                 trace_smb3_falloc_done(xid, cfile->fid.persistent_fid, tcon->tid,
3730                                 tcon->ses->Suid, off, len);
3731
3732         free_xid(xid);
3733         return rc;
3734 }
3735
3736 static loff_t smb3_llseek(struct file *file, struct cifs_tcon *tcon, loff_t offset, int whence)
3737 {
3738         struct cifsFileInfo *wrcfile, *cfile = file->private_data;
3739         struct cifsInodeInfo *cifsi;
3740         struct inode *inode;
3741         int rc = 0;
3742         struct file_allocated_range_buffer in_data, *out_data = NULL;
3743         u32 out_data_len;
3744         unsigned int xid;
3745
3746         if (whence != SEEK_HOLE && whence != SEEK_DATA)
3747                 return generic_file_llseek(file, offset, whence);
3748
3749         inode = d_inode(cfile->dentry);
3750         cifsi = CIFS_I(inode);
3751
3752         if (offset < 0 || offset >= i_size_read(inode))
3753                 return -ENXIO;
3754
3755         xid = get_xid();
3756         /*
3757          * We need to be sure that all dirty pages are written as they
3758          * might fill holes on the server.
3759          * Note that we also MUST flush any written pages since at least
3760          * some servers (Windows2016) will not reflect recent writes in
3761          * QUERY_ALLOCATED_RANGES until SMB2_flush is called.
3762          */
3763         wrcfile = find_writable_file(cifsi, FIND_WR_ANY);
3764         if (wrcfile) {
3765                 filemap_write_and_wait(inode->i_mapping);
3766                 smb2_flush_file(xid, tcon, &wrcfile->fid);
3767                 cifsFileInfo_put(wrcfile);
3768         }
3769
3770         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) {
3771                 if (whence == SEEK_HOLE)
3772                         offset = i_size_read(inode);
3773                 goto lseek_exit;
3774         }
3775
3776         in_data.file_offset = cpu_to_le64(offset);
3777         in_data.length = cpu_to_le64(i_size_read(inode));
3778
3779         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3780                         cfile->fid.volatile_fid,
3781                         FSCTL_QUERY_ALLOCATED_RANGES,
3782                         (char *)&in_data, sizeof(in_data),
3783                         sizeof(struct file_allocated_range_buffer),
3784                         (char **)&out_data, &out_data_len);
3785         if (rc == -E2BIG)
3786                 rc = 0;
3787         if (rc)
3788                 goto lseek_exit;
3789
3790         if (whence == SEEK_HOLE && out_data_len == 0)
3791                 goto lseek_exit;
3792
3793         if (whence == SEEK_DATA && out_data_len == 0) {
3794                 rc = -ENXIO;
3795                 goto lseek_exit;
3796         }
3797
3798         if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3799                 rc = -EINVAL;
3800                 goto lseek_exit;
3801         }
3802         if (whence == SEEK_DATA) {
3803                 offset = le64_to_cpu(out_data->file_offset);
3804                 goto lseek_exit;
3805         }
3806         if (offset < le64_to_cpu(out_data->file_offset))
3807                 goto lseek_exit;
3808
3809         offset = le64_to_cpu(out_data->file_offset) + le64_to_cpu(out_data->length);
3810
3811  lseek_exit:
3812         free_xid(xid);
3813         kfree(out_data);
3814         if (!rc)
3815                 return vfs_setpos(file, offset, inode->i_sb->s_maxbytes);
3816         else
3817                 return rc;
3818 }
3819
3820 static int smb3_fiemap(struct cifs_tcon *tcon,
3821                        struct cifsFileInfo *cfile,
3822                        struct fiemap_extent_info *fei, u64 start, u64 len)
3823 {
3824         unsigned int xid;
3825         struct file_allocated_range_buffer in_data, *out_data;
3826         u32 out_data_len;
3827         int i, num, rc, flags, last_blob;
3828         u64 next;
3829
3830         rc = fiemap_prep(d_inode(cfile->dentry), fei, start, &len, 0);
3831         if (rc)
3832                 return rc;
3833
3834         xid = get_xid();
3835  again:
3836         in_data.file_offset = cpu_to_le64(start);
3837         in_data.length = cpu_to_le64(len);
3838
3839         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3840                         cfile->fid.volatile_fid,
3841                         FSCTL_QUERY_ALLOCATED_RANGES,
3842                         (char *)&in_data, sizeof(in_data),
3843                         1024 * sizeof(struct file_allocated_range_buffer),
3844                         (char **)&out_data, &out_data_len);
3845         if (rc == -E2BIG) {
3846                 last_blob = 0;
3847                 rc = 0;
3848         } else
3849                 last_blob = 1;
3850         if (rc)
3851                 goto out;
3852
3853         if (out_data_len && out_data_len < sizeof(struct file_allocated_range_buffer)) {
3854                 rc = -EINVAL;
3855                 goto out;
3856         }
3857         if (out_data_len % sizeof(struct file_allocated_range_buffer)) {
3858                 rc = -EINVAL;
3859                 goto out;
3860         }
3861
3862         num = out_data_len / sizeof(struct file_allocated_range_buffer);
3863         for (i = 0; i < num; i++) {
3864                 flags = 0;
3865                 if (i == num - 1 && last_blob)
3866                         flags |= FIEMAP_EXTENT_LAST;
3867
3868                 rc = fiemap_fill_next_extent(fei,
3869                                 le64_to_cpu(out_data[i].file_offset),
3870                                 le64_to_cpu(out_data[i].file_offset),
3871                                 le64_to_cpu(out_data[i].length),
3872                                 flags);
3873                 if (rc < 0)
3874                         goto out;
3875                 if (rc == 1) {
3876                         rc = 0;
3877                         goto out;
3878                 }
3879         }
3880
3881         if (!last_blob) {
3882                 next = le64_to_cpu(out_data[num - 1].file_offset) +
3883                   le64_to_cpu(out_data[num - 1].length);
3884                 len = len - (next - start);
3885                 start = next;
3886                 goto again;
3887         }
3888
3889  out:
3890         free_xid(xid);
3891         kfree(out_data);
3892         return rc;
3893 }
3894
3895 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
3896                            loff_t off, loff_t len)
3897 {
3898         /* KEEP_SIZE already checked for by do_fallocate */
3899         if (mode & FALLOC_FL_PUNCH_HOLE)
3900                 return smb3_punch_hole(file, tcon, off, len);
3901         else if (mode & FALLOC_FL_ZERO_RANGE) {
3902                 if (mode & FALLOC_FL_KEEP_SIZE)
3903                         return smb3_zero_range(file, tcon, off, len, true);
3904                 return smb3_zero_range(file, tcon, off, len, false);
3905         } else if (mode == FALLOC_FL_KEEP_SIZE)
3906                 return smb3_simple_falloc(file, tcon, off, len, true);
3907         else if (mode == 0)
3908                 return smb3_simple_falloc(file, tcon, off, len, false);
3909
3910         return -EOPNOTSUPP;
3911 }
3912
3913 static void
3914 smb2_downgrade_oplock(struct TCP_Server_Info *server,
3915                       struct cifsInodeInfo *cinode, __u32 oplock,
3916                       unsigned int epoch, bool *purge_cache)
3917 {
3918         server->ops->set_oplock_level(cinode, oplock, 0, NULL);
3919 }
3920
3921 static void
3922 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3923                        unsigned int epoch, bool *purge_cache);
3924
3925 static void
3926 smb3_downgrade_oplock(struct TCP_Server_Info *server,
3927                        struct cifsInodeInfo *cinode, __u32 oplock,
3928                        unsigned int epoch, bool *purge_cache)
3929 {
3930         unsigned int old_state = cinode->oplock;
3931         unsigned int old_epoch = cinode->epoch;
3932         unsigned int new_state;
3933
3934         if (epoch > old_epoch) {
3935                 smb21_set_oplock_level(cinode, oplock, 0, NULL);
3936                 cinode->epoch = epoch;
3937         }
3938
3939         new_state = cinode->oplock;
3940         *purge_cache = false;
3941
3942         if ((old_state & CIFS_CACHE_READ_FLG) != 0 &&
3943             (new_state & CIFS_CACHE_READ_FLG) == 0)
3944                 *purge_cache = true;
3945         else if (old_state == new_state && (epoch - old_epoch > 1))
3946                 *purge_cache = true;
3947 }
3948
3949 static void
3950 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3951                       unsigned int epoch, bool *purge_cache)
3952 {
3953         oplock &= 0xFF;
3954         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
3955                 return;
3956         if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
3957                 cinode->oplock = CIFS_CACHE_RHW_FLG;
3958                 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
3959                          &cinode->vfs_inode);
3960         } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
3961                 cinode->oplock = CIFS_CACHE_RW_FLG;
3962                 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
3963                          &cinode->vfs_inode);
3964         } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
3965                 cinode->oplock = CIFS_CACHE_READ_FLG;
3966                 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
3967                          &cinode->vfs_inode);
3968         } else
3969                 cinode->oplock = 0;
3970 }
3971
3972 static void
3973 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3974                        unsigned int epoch, bool *purge_cache)
3975 {
3976         char message[5] = {0};
3977         unsigned int new_oplock = 0;
3978
3979         oplock &= 0xFF;
3980         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
3981                 return;
3982
3983         /* Check if the server granted an oplock rather than a lease */
3984         if (oplock & SMB2_OPLOCK_LEVEL_EXCLUSIVE)
3985                 return smb2_set_oplock_level(cinode, oplock, epoch,
3986                                              purge_cache);
3987
3988         if (oplock & SMB2_LEASE_READ_CACHING_HE) {
3989                 new_oplock |= CIFS_CACHE_READ_FLG;
3990                 strcat(message, "R");
3991         }
3992         if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
3993                 new_oplock |= CIFS_CACHE_HANDLE_FLG;
3994                 strcat(message, "H");
3995         }
3996         if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
3997                 new_oplock |= CIFS_CACHE_WRITE_FLG;
3998                 strcat(message, "W");
3999         }
4000         if (!new_oplock)
4001                 strncpy(message, "None", sizeof(message));
4002
4003         cinode->oplock = new_oplock;
4004         cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
4005                  &cinode->vfs_inode);
4006 }
4007
4008 static void
4009 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
4010                       unsigned int epoch, bool *purge_cache)
4011 {
4012         unsigned int old_oplock = cinode->oplock;
4013
4014         smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
4015
4016         if (purge_cache) {
4017                 *purge_cache = false;
4018                 if (old_oplock == CIFS_CACHE_READ_FLG) {
4019                         if (cinode->oplock == CIFS_CACHE_READ_FLG &&
4020                             (epoch - cinode->epoch > 0))
4021                                 *purge_cache = true;
4022                         else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
4023                                  (epoch - cinode->epoch > 1))
4024                                 *purge_cache = true;
4025                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
4026                                  (epoch - cinode->epoch > 1))
4027                                 *purge_cache = true;
4028                         else if (cinode->oplock == 0 &&
4029                                  (epoch - cinode->epoch > 0))
4030                                 *purge_cache = true;
4031                 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
4032                         if (cinode->oplock == CIFS_CACHE_RH_FLG &&
4033                             (epoch - cinode->epoch > 0))
4034                                 *purge_cache = true;
4035                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
4036                                  (epoch - cinode->epoch > 1))
4037                                 *purge_cache = true;
4038                 }
4039                 cinode->epoch = epoch;
4040         }
4041 }
4042
4043 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
4044 static bool
4045 smb2_is_read_op(__u32 oplock)
4046 {
4047         return oplock == SMB2_OPLOCK_LEVEL_II;
4048 }
4049 #endif /* CIFS_ALLOW_INSECURE_LEGACY */
4050
4051 static bool
4052 smb21_is_read_op(__u32 oplock)
4053 {
4054         return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
4055                !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
4056 }
4057
4058 static __le32
4059 map_oplock_to_lease(u8 oplock)
4060 {
4061         if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
4062                 return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING;
4063         else if (oplock == SMB2_OPLOCK_LEVEL_II)
4064                 return SMB2_LEASE_READ_CACHING;
4065         else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
4066                 return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING |
4067                        SMB2_LEASE_WRITE_CACHING;
4068         return 0;
4069 }
4070
4071 static char *
4072 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
4073 {
4074         struct create_lease *buf;
4075
4076         buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
4077         if (!buf)
4078                 return NULL;
4079
4080         memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
4081         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
4082
4083         buf->ccontext.DataOffset = cpu_to_le16(offsetof
4084                                         (struct create_lease, lcontext));
4085         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
4086         buf->ccontext.NameOffset = cpu_to_le16(offsetof
4087                                 (struct create_lease, Name));
4088         buf->ccontext.NameLength = cpu_to_le16(4);
4089         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
4090         buf->Name[0] = 'R';
4091         buf->Name[1] = 'q';
4092         buf->Name[2] = 'L';
4093         buf->Name[3] = 's';
4094         return (char *)buf;
4095 }
4096
4097 static char *
4098 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
4099 {
4100         struct create_lease_v2 *buf;
4101
4102         buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
4103         if (!buf)
4104                 return NULL;
4105
4106         memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
4107         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
4108
4109         buf->ccontext.DataOffset = cpu_to_le16(offsetof
4110                                         (struct create_lease_v2, lcontext));
4111         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
4112         buf->ccontext.NameOffset = cpu_to_le16(offsetof
4113                                 (struct create_lease_v2, Name));
4114         buf->ccontext.NameLength = cpu_to_le16(4);
4115         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
4116         buf->Name[0] = 'R';
4117         buf->Name[1] = 'q';
4118         buf->Name[2] = 'L';
4119         buf->Name[3] = 's';
4120         return (char *)buf;
4121 }
4122
4123 static __u8
4124 smb2_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
4125 {
4126         struct create_lease *lc = (struct create_lease *)buf;
4127
4128         *epoch = 0; /* not used */
4129         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
4130                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
4131         return le32_to_cpu(lc->lcontext.LeaseState);
4132 }
4133
4134 static __u8
4135 smb3_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
4136 {
4137         struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
4138
4139         *epoch = le16_to_cpu(lc->lcontext.Epoch);
4140         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
4141                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
4142         if (lease_key)
4143                 memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE);
4144         return le32_to_cpu(lc->lcontext.LeaseState);
4145 }
4146
4147 static unsigned int
4148 smb2_wp_retry_size(struct inode *inode)
4149 {
4150         return min_t(unsigned int, CIFS_SB(inode->i_sb)->wsize,
4151                      SMB2_MAX_BUFFER_SIZE);
4152 }
4153
4154 static bool
4155 smb2_dir_needs_close(struct cifsFileInfo *cfile)
4156 {
4157         return !cfile->invalidHandle;
4158 }
4159
4160 static void
4161 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len,
4162                    struct smb_rqst *old_rq, __le16 cipher_type)
4163 {
4164         struct smb2_sync_hdr *shdr =
4165                         (struct smb2_sync_hdr *)old_rq->rq_iov[0].iov_base;
4166
4167         memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
4168         tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
4169         tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
4170         tr_hdr->Flags = cpu_to_le16(0x01);
4171         if ((cipher_type == SMB2_ENCRYPTION_AES128_GCM) ||
4172             (cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4173                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
4174         else
4175                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
4176         memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8);
4177 }
4178
4179 static void *smb2_aead_req_alloc(struct crypto_aead *tfm, const struct smb_rqst *rqst,
4180                                  int num_rqst, const u8 *sig, u8 **iv,
4181                                  struct aead_request **req, struct scatterlist **sgl,
4182                                  unsigned int *num_sgs)
4183 {
4184         unsigned int req_size = sizeof(**req) + crypto_aead_reqsize(tfm);
4185         unsigned int iv_size = crypto_aead_ivsize(tfm);
4186         unsigned int len;
4187         u8 *p;
4188
4189         *num_sgs = cifs_get_num_sgs(rqst, num_rqst, sig);
4190
4191         len = iv_size;
4192         len += crypto_aead_alignmask(tfm) & ~(crypto_tfm_ctx_alignment() - 1);
4193         len = ALIGN(len, crypto_tfm_ctx_alignment());
4194         len += req_size;
4195         len = ALIGN(len, __alignof__(struct scatterlist));
4196         len += *num_sgs * sizeof(**sgl);
4197
4198         p = kmalloc(len, GFP_ATOMIC);
4199         if (!p)
4200                 return NULL;
4201
4202         *iv = (u8 *)PTR_ALIGN(p, crypto_aead_alignmask(tfm) + 1);
4203         *req = (struct aead_request *)PTR_ALIGN(*iv + iv_size,
4204                                                 crypto_tfm_ctx_alignment());
4205         *sgl = (struct scatterlist *)PTR_ALIGN((u8 *)*req + req_size,
4206                                                __alignof__(struct scatterlist));
4207         return p;
4208 }
4209
4210 static void *smb2_get_aead_req(struct crypto_aead *tfm, const struct smb_rqst *rqst,
4211                                int num_rqst, const u8 *sig, u8 **iv,
4212                                struct aead_request **req, struct scatterlist **sgl)
4213 {
4214         unsigned int off, len, skip;
4215         struct scatterlist *sg;
4216         unsigned int num_sgs;
4217         unsigned long addr;
4218         int i, j;
4219         void *p;
4220
4221         p = smb2_aead_req_alloc(tfm, rqst, num_rqst, sig, iv, req, sgl, &num_sgs);
4222         if (!p)
4223                 return NULL;
4224
4225         sg_init_table(*sgl, num_sgs);
4226         sg = *sgl;
4227
4228         /* Assumes the first rqst has a transform header as the first iov.
4229          * I.e.
4230          * rqst[0].rq_iov[0]  is transform header
4231          * rqst[0].rq_iov[1+] data to be encrypted/decrypted
4232          * rqst[1+].rq_iov[0+] data to be encrypted/decrypted
4233          */
4234         for (i = 0; i < num_rqst; i++) {
4235                 /*
4236                  * The first rqst has a transform header where the
4237                  * first 20 bytes are not part of the encrypted blob.
4238                  */
4239                 for (j = 0; j < rqst[i].rq_nvec; j++) {
4240                         struct kvec *iov = &rqst[i].rq_iov[j];
4241
4242                         skip = (i == 0) && (j == 0) ? 20 : 0;
4243                         addr = (unsigned long)iov->iov_base + skip;
4244                         len = iov->iov_len - skip;
4245                         sg = cifs_sg_set_buf(sg, (void *)addr, len);
4246                 }
4247                 for (j = 0; j < rqst[i].rq_npages; j++) {
4248                         rqst_page_get_length(&rqst[i], j, &len, &off);
4249                         sg_set_page(sg++, rqst[i].rq_pages[j], len, off);
4250                 }
4251         }
4252         cifs_sg_set_buf(sg, sig, SMB2_SIGNATURE_SIZE);
4253
4254         return p;
4255 }
4256
4257 static int
4258 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)
4259 {
4260         struct cifs_ses *ses;
4261         u8 *ses_enc_key;
4262
4263         spin_lock(&cifs_tcp_ses_lock);
4264         list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
4265                 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
4266                         if (ses->Suid == ses_id) {
4267                                 ses_enc_key = enc ? ses->smb3encryptionkey :
4268                                         ses->smb3decryptionkey;
4269                                 memcpy(key, ses_enc_key, SMB3_ENC_DEC_KEY_SIZE);
4270                                 spin_unlock(&cifs_tcp_ses_lock);
4271                                 return 0;
4272                         }
4273                 }
4274         }
4275         spin_unlock(&cifs_tcp_ses_lock);
4276
4277         return -EAGAIN;
4278 }
4279 /*
4280  * Encrypt or decrypt @rqst message. @rqst[0] has the following format:
4281  * iov[0]   - transform header (associate data),
4282  * iov[1-N] - SMB2 header and pages - data to encrypt.
4283  * On success return encrypted data in iov[1-N] and pages, leave iov[0]
4284  * untouched.
4285  */
4286 static int
4287 crypt_message(struct TCP_Server_Info *server, int num_rqst,
4288               struct smb_rqst *rqst, int enc)
4289 {
4290         struct smb2_transform_hdr *tr_hdr =
4291                 (struct smb2_transform_hdr *)rqst[0].rq_iov[0].iov_base;
4292         unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20;
4293         int rc = 0;
4294         struct scatterlist *sg;
4295         u8 sign[SMB2_SIGNATURE_SIZE] = {};
4296         u8 key[SMB3_ENC_DEC_KEY_SIZE];
4297         struct aead_request *req;
4298         u8 *iv;
4299         DECLARE_CRYPTO_WAIT(wait);
4300         struct crypto_aead *tfm;
4301         unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
4302         void *creq;
4303
4304         rc = smb2_get_enc_key(server, tr_hdr->SessionId, enc, key);
4305         if (rc) {
4306                 cifs_server_dbg(VFS, "%s: Could not get %scryption key\n", __func__,
4307                          enc ? "en" : "de");
4308                 return rc;
4309         }
4310
4311         rc = smb3_crypto_aead_allocate(server);
4312         if (rc) {
4313                 cifs_server_dbg(VFS, "%s: crypto alloc failed\n", __func__);
4314                 return rc;
4315         }
4316
4317         tfm = enc ? server->secmech.ccmaesencrypt :
4318                                                 server->secmech.ccmaesdecrypt;
4319
4320         if ((server->cipher_type == SMB2_ENCRYPTION_AES256_CCM) ||
4321                 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4322                 rc = crypto_aead_setkey(tfm, key, SMB3_GCM256_CRYPTKEY_SIZE);
4323         else
4324                 rc = crypto_aead_setkey(tfm, key, SMB3_GCM128_CRYPTKEY_SIZE);
4325
4326         if (rc) {
4327                 cifs_server_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc);
4328                 return rc;
4329         }
4330
4331         rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE);
4332         if (rc) {
4333                 cifs_server_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc);
4334                 return rc;
4335         }
4336
4337         creq = smb2_get_aead_req(tfm, rqst, num_rqst, sign, &iv, &req, &sg);
4338         if (unlikely(!creq))
4339                 return -ENOMEM;
4340
4341         if (!enc) {
4342                 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE);
4343                 crypt_len += SMB2_SIGNATURE_SIZE;
4344         }
4345
4346         if ((server->cipher_type == SMB2_ENCRYPTION_AES128_GCM) ||
4347             (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4348                 memcpy(iv, (char *)tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
4349         else {
4350                 iv[0] = 3;
4351                 memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
4352         }
4353
4354         aead_request_set_tfm(req, tfm);
4355         aead_request_set_crypt(req, sg, sg, crypt_len, iv);
4356         aead_request_set_ad(req, assoc_data_len);
4357
4358         aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
4359                                   crypto_req_done, &wait);
4360
4361         rc = crypto_wait_req(enc ? crypto_aead_encrypt(req)
4362                                 : crypto_aead_decrypt(req), &wait);
4363
4364         if (!rc && enc)
4365                 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE);
4366
4367         kfree_sensitive(creq);
4368         return rc;
4369 }
4370
4371 void
4372 smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst)
4373 {
4374         int i, j;
4375
4376         for (i = 0; i < num_rqst; i++) {
4377                 if (rqst[i].rq_pages) {
4378                         for (j = rqst[i].rq_npages - 1; j >= 0; j--)
4379                                 put_page(rqst[i].rq_pages[j]);
4380                         kfree(rqst[i].rq_pages);
4381                 }
4382         }
4383 }
4384
4385 /*
4386  * This function will initialize new_rq and encrypt the content.
4387  * The first entry, new_rq[0], only contains a single iov which contains
4388  * a smb2_transform_hdr and is pre-allocated by the caller.
4389  * This function then populates new_rq[1+] with the content from olq_rq[0+].
4390  *
4391  * The end result is an array of smb_rqst structures where the first structure
4392  * only contains a single iov for the transform header which we then can pass
4393  * to crypt_message().
4394  *
4395  * new_rq[0].rq_iov[0] :  smb2_transform_hdr pre-allocated by the caller
4396  * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests
4397  */
4398 static int
4399 smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst,
4400                        struct smb_rqst *new_rq, struct smb_rqst *old_rq)
4401 {
4402         struct page **pages;
4403         struct smb2_transform_hdr *tr_hdr = new_rq[0].rq_iov[0].iov_base;
4404         unsigned int npages;
4405         unsigned int orig_len = 0;
4406         int i, j;
4407         int rc = -ENOMEM;
4408
4409         for (i = 1; i < num_rqst; i++) {
4410                 npages = old_rq[i - 1].rq_npages;
4411                 pages = kmalloc_array(npages, sizeof(struct page *),
4412                                       GFP_KERNEL);
4413                 if (!pages)
4414                         goto err_free;
4415
4416                 new_rq[i].rq_pages = pages;
4417                 new_rq[i].rq_npages = npages;
4418                 new_rq[i].rq_offset = old_rq[i - 1].rq_offset;
4419                 new_rq[i].rq_pagesz = old_rq[i - 1].rq_pagesz;
4420                 new_rq[i].rq_tailsz = old_rq[i - 1].rq_tailsz;
4421                 new_rq[i].rq_iov = old_rq[i - 1].rq_iov;
4422                 new_rq[i].rq_nvec = old_rq[i - 1].rq_nvec;
4423
4424                 orig_len += smb_rqst_len(server, &old_rq[i - 1]);
4425
4426                 for (j = 0; j < npages; j++) {
4427                         pages[j] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
4428                         if (!pages[j])
4429                                 goto err_free;
4430                 }
4431
4432                 /* copy pages form the old */
4433                 for (j = 0; j < npages; j++) {
4434                         char *dst, *src;
4435                         unsigned int offset, len;
4436
4437                         rqst_page_get_length(&new_rq[i], j, &len, &offset);
4438
4439                         dst = (char *) kmap(new_rq[i].rq_pages[j]) + offset;
4440                         src = (char *) kmap(old_rq[i - 1].rq_pages[j]) + offset;
4441
4442                         memcpy(dst, src, len);
4443                         kunmap(new_rq[i].rq_pages[j]);
4444                         kunmap(old_rq[i - 1].rq_pages[j]);
4445                 }
4446         }
4447
4448         /* fill the 1st iov with a transform header */
4449         fill_transform_hdr(tr_hdr, orig_len, old_rq, server->cipher_type);
4450
4451         rc = crypt_message(server, num_rqst, new_rq, 1);
4452         cifs_dbg(FYI, "Encrypt message returned %d\n", rc);
4453         if (rc)
4454                 goto err_free;
4455
4456         return rc;
4457
4458 err_free:
4459         smb3_free_compound_rqst(num_rqst - 1, &new_rq[1]);
4460         return rc;
4461 }
4462
4463 static int
4464 smb3_is_transform_hdr(void *buf)
4465 {
4466         struct smb2_transform_hdr *trhdr = buf;
4467
4468         return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
4469 }
4470
4471 static int
4472 decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
4473                  unsigned int buf_data_size, struct page **pages,
4474                  unsigned int npages, unsigned int page_data_size,
4475                  bool is_offloaded)
4476 {
4477         struct kvec iov[2];
4478         struct smb_rqst rqst = {NULL};
4479         int rc;
4480
4481         iov[0].iov_base = buf;
4482         iov[0].iov_len = sizeof(struct smb2_transform_hdr);
4483         iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr);
4484         iov[1].iov_len = buf_data_size;
4485
4486         rqst.rq_iov = iov;
4487         rqst.rq_nvec = 2;
4488         rqst.rq_pages = pages;
4489         rqst.rq_npages = npages;
4490         rqst.rq_pagesz = PAGE_SIZE;
4491         rqst.rq_tailsz = (page_data_size % PAGE_SIZE) ? : PAGE_SIZE;
4492
4493         rc = crypt_message(server, 1, &rqst, 0);
4494         cifs_dbg(FYI, "Decrypt message returned %d\n", rc);
4495
4496         if (rc)
4497                 return rc;
4498
4499         memmove(buf, iov[1].iov_base, buf_data_size);
4500
4501         if (!is_offloaded)
4502                 server->total_read = buf_data_size + page_data_size;
4503
4504         return rc;
4505 }
4506
4507 static int
4508 read_data_into_pages(struct TCP_Server_Info *server, struct page **pages,
4509                      unsigned int npages, unsigned int len)
4510 {
4511         int i;
4512         int length;
4513
4514         for (i = 0; i < npages; i++) {
4515                 struct page *page = pages[i];
4516                 size_t n;
4517
4518                 n = len;
4519                 if (len >= PAGE_SIZE) {
4520                         /* enough data to fill the page */
4521                         n = PAGE_SIZE;
4522                         len -= n;
4523                 } else {
4524                         zero_user(page, len, PAGE_SIZE - len);
4525                         len = 0;
4526                 }
4527                 length = cifs_read_page_from_socket(server, page, 0, n);
4528                 if (length < 0)
4529                         return length;
4530                 server->total_read += length;
4531         }
4532
4533         return 0;
4534 }
4535
4536 static int
4537 init_read_bvec(struct page **pages, unsigned int npages, unsigned int data_size,
4538                unsigned int cur_off, struct bio_vec **page_vec)
4539 {
4540         struct bio_vec *bvec;
4541         int i;
4542
4543         bvec = kcalloc(npages, sizeof(struct bio_vec), GFP_KERNEL);
4544         if (!bvec)
4545                 return -ENOMEM;
4546
4547         for (i = 0; i < npages; i++) {
4548                 bvec[i].bv_page = pages[i];
4549                 bvec[i].bv_offset = (i == 0) ? cur_off : 0;
4550                 bvec[i].bv_len = min_t(unsigned int, PAGE_SIZE, data_size);
4551                 data_size -= bvec[i].bv_len;
4552         }
4553
4554         if (data_size != 0) {
4555                 cifs_dbg(VFS, "%s: something went wrong\n", __func__);
4556                 kfree(bvec);
4557                 return -EIO;
4558         }
4559
4560         *page_vec = bvec;
4561         return 0;
4562 }
4563
4564 static int
4565 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
4566                  char *buf, unsigned int buf_len, struct page **pages,
4567                  unsigned int npages, unsigned int page_data_size,
4568                  bool is_offloaded)
4569 {
4570         unsigned int data_offset;
4571         unsigned int data_len;
4572         unsigned int cur_off;
4573         unsigned int cur_page_idx;
4574         unsigned int pad_len;
4575         struct cifs_readdata *rdata = mid->callback_data;
4576         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
4577         struct bio_vec *bvec = NULL;
4578         struct iov_iter iter;
4579         struct kvec iov;
4580         int length;
4581         bool use_rdma_mr = false;
4582
4583         if (shdr->Command != SMB2_READ) {
4584                 cifs_server_dbg(VFS, "only big read responses are supported\n");
4585                 return -ENOTSUPP;
4586         }
4587
4588         if (server->ops->is_session_expired &&
4589             server->ops->is_session_expired(buf)) {
4590                 if (!is_offloaded)
4591                         cifs_reconnect(server);
4592                 return -1;
4593         }
4594
4595         if (server->ops->is_status_pending &&
4596                         server->ops->is_status_pending(buf, server))
4597                 return -1;
4598
4599         /* set up first two iov to get credits */
4600         rdata->iov[0].iov_base = buf;
4601         rdata->iov[0].iov_len = 0;
4602         rdata->iov[1].iov_base = buf;
4603         rdata->iov[1].iov_len =
4604                 min_t(unsigned int, buf_len, server->vals->read_rsp_size);
4605         cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
4606                  rdata->iov[0].iov_base, rdata->iov[0].iov_len);
4607         cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n",
4608                  rdata->iov[1].iov_base, rdata->iov[1].iov_len);
4609
4610         rdata->result = server->ops->map_error(buf, true);
4611         if (rdata->result != 0) {
4612                 cifs_dbg(FYI, "%s: server returned error %d\n",
4613                          __func__, rdata->result);
4614                 /* normal error on read response */
4615                 if (is_offloaded)
4616                         mid->mid_state = MID_RESPONSE_RECEIVED;
4617                 else
4618                         dequeue_mid(mid, false);
4619                 return 0;
4620         }
4621
4622         data_offset = server->ops->read_data_offset(buf);
4623 #ifdef CONFIG_CIFS_SMB_DIRECT
4624         use_rdma_mr = rdata->mr;
4625 #endif
4626         data_len = server->ops->read_data_length(buf, use_rdma_mr);
4627
4628         if (data_offset < server->vals->read_rsp_size) {
4629                 /*
4630                  * win2k8 sometimes sends an offset of 0 when the read
4631                  * is beyond the EOF. Treat it as if the data starts just after
4632                  * the header.
4633                  */
4634                 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n",
4635                          __func__, data_offset);
4636                 data_offset = server->vals->read_rsp_size;
4637         } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) {
4638                 /* data_offset is beyond the end of smallbuf */
4639                 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n",
4640                          __func__, data_offset);
4641                 rdata->result = -EIO;
4642                 if (is_offloaded)
4643                         mid->mid_state = MID_RESPONSE_MALFORMED;
4644                 else
4645                         dequeue_mid(mid, rdata->result);
4646                 return 0;
4647         }
4648
4649         pad_len = data_offset - server->vals->read_rsp_size;
4650
4651         if (buf_len <= data_offset) {
4652                 /* read response payload is in pages */
4653                 cur_page_idx = pad_len / PAGE_SIZE;
4654                 cur_off = pad_len % PAGE_SIZE;
4655
4656                 if (cur_page_idx != 0) {
4657                         /* data offset is beyond the 1st page of response */
4658                         cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n",
4659                                  __func__, data_offset);
4660                         rdata->result = -EIO;
4661                         if (is_offloaded)
4662                                 mid->mid_state = MID_RESPONSE_MALFORMED;
4663                         else
4664                                 dequeue_mid(mid, rdata->result);
4665                         return 0;
4666                 }
4667
4668                 if (data_len > page_data_size - pad_len) {
4669                         /* data_len is corrupt -- discard frame */
4670                         rdata->result = -EIO;
4671                         if (is_offloaded)
4672                                 mid->mid_state = MID_RESPONSE_MALFORMED;
4673                         else
4674                                 dequeue_mid(mid, rdata->result);
4675                         return 0;
4676                 }
4677
4678                 rdata->result = init_read_bvec(pages, npages, page_data_size,
4679                                                cur_off, &bvec);
4680                 if (rdata->result != 0) {
4681                         if (is_offloaded)
4682                                 mid->mid_state = MID_RESPONSE_MALFORMED;
4683                         else
4684                                 dequeue_mid(mid, rdata->result);
4685                         return 0;
4686                 }
4687
4688                 iov_iter_bvec(&iter, WRITE, bvec, npages, data_len);
4689         } else if (buf_len >= data_offset + data_len) {
4690                 /* read response payload is in buf */
4691                 WARN_ONCE(npages > 0, "read data can be either in buf or in pages");
4692                 iov.iov_base = buf + data_offset;
4693                 iov.iov_len = data_len;
4694                 iov_iter_kvec(&iter, WRITE, &iov, 1, data_len);
4695         } else {
4696                 /* read response payload cannot be in both buf and pages */
4697                 WARN_ONCE(1, "buf can not contain only a part of read data");
4698                 rdata->result = -EIO;
4699                 if (is_offloaded)
4700                         mid->mid_state = MID_RESPONSE_MALFORMED;
4701                 else
4702                         dequeue_mid(mid, rdata->result);
4703                 return 0;
4704         }
4705
4706         length = rdata->copy_into_pages(server, rdata, &iter);
4707
4708         kfree(bvec);
4709
4710         if (length < 0)
4711                 return length;
4712
4713         if (is_offloaded)
4714                 mid->mid_state = MID_RESPONSE_RECEIVED;
4715         else
4716                 dequeue_mid(mid, false);
4717         return length;
4718 }
4719
4720 struct smb2_decrypt_work {
4721         struct work_struct decrypt;
4722         struct TCP_Server_Info *server;
4723         struct page **ppages;
4724         char *buf;
4725         unsigned int npages;
4726         unsigned int len;
4727 };
4728
4729
4730 static void smb2_decrypt_offload(struct work_struct *work)
4731 {
4732         struct smb2_decrypt_work *dw = container_of(work,
4733                                 struct smb2_decrypt_work, decrypt);
4734         int i, rc;
4735         struct mid_q_entry *mid;
4736
4737         rc = decrypt_raw_data(dw->server, dw->buf, dw->server->vals->read_rsp_size,
4738                               dw->ppages, dw->npages, dw->len, true);
4739         if (rc) {
4740                 cifs_dbg(VFS, "error decrypting rc=%d\n", rc);
4741                 goto free_pages;
4742         }
4743
4744         dw->server->lstrp = jiffies;
4745         mid = smb2_find_dequeue_mid(dw->server, dw->buf);
4746         if (mid == NULL)
4747                 cifs_dbg(FYI, "mid not found\n");
4748         else {
4749                 mid->decrypted = true;
4750                 rc = handle_read_data(dw->server, mid, dw->buf,
4751                                       dw->server->vals->read_rsp_size,
4752                                       dw->ppages, dw->npages, dw->len,
4753                                       true);
4754                 if (rc >= 0) {
4755 #ifdef CONFIG_CIFS_STATS2
4756                         mid->when_received = jiffies;
4757 #endif
4758                         mid->callback(mid);
4759                 } else {
4760                         spin_lock(&GlobalMid_Lock);
4761                         if (dw->server->tcpStatus == CifsNeedReconnect) {
4762                                 mid->mid_state = MID_RETRY_NEEDED;
4763                                 spin_unlock(&GlobalMid_Lock);
4764                                 mid->callback(mid);
4765                         } else {
4766                                 mid->mid_state = MID_REQUEST_SUBMITTED;
4767                                 mid->mid_flags &= ~(MID_DELETED);
4768                                 list_add_tail(&mid->qhead,
4769                                         &dw->server->pending_mid_q);
4770                                 spin_unlock(&GlobalMid_Lock);
4771                         }
4772                 }
4773                 cifs_mid_q_entry_release(mid);
4774         }
4775
4776 free_pages:
4777         for (i = dw->npages-1; i >= 0; i--)
4778                 put_page(dw->ppages[i]);
4779
4780         kfree(dw->ppages);
4781         cifs_small_buf_release(dw->buf);
4782         kfree(dw);
4783 }
4784
4785
4786 static int
4787 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid,
4788                        int *num_mids)
4789 {
4790         char *buf = server->smallbuf;
4791         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
4792         unsigned int npages;
4793         struct page **pages;
4794         unsigned int len;
4795         unsigned int buflen = server->pdu_size;
4796         int rc;
4797         int i = 0;
4798         struct smb2_decrypt_work *dw;
4799
4800         *num_mids = 1;
4801         len = min_t(unsigned int, buflen, server->vals->read_rsp_size +
4802                 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1;
4803
4804         rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len);
4805         if (rc < 0)
4806                 return rc;
4807         server->total_read += rc;
4808
4809         len = le32_to_cpu(tr_hdr->OriginalMessageSize) -
4810                 server->vals->read_rsp_size;
4811         npages = DIV_ROUND_UP(len, PAGE_SIZE);
4812
4813         pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
4814         if (!pages) {
4815                 rc = -ENOMEM;
4816                 goto discard_data;
4817         }
4818
4819         for (; i < npages; i++) {
4820                 pages[i] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
4821                 if (!pages[i]) {
4822                         rc = -ENOMEM;
4823                         goto discard_data;
4824                 }
4825         }
4826
4827         /* read read data into pages */
4828         rc = read_data_into_pages(server, pages, npages, len);
4829         if (rc)
4830                 goto free_pages;
4831
4832         rc = cifs_discard_remaining_data(server);
4833         if (rc)
4834                 goto free_pages;
4835
4836         /*
4837          * For large reads, offload to different thread for better performance,
4838          * use more cores decrypting which can be expensive
4839          */
4840
4841         if ((server->min_offload) && (server->in_flight > 1) &&
4842             (server->pdu_size >= server->min_offload)) {
4843                 dw = kmalloc(sizeof(struct smb2_decrypt_work), GFP_KERNEL);
4844                 if (dw == NULL)
4845                         goto non_offloaded_decrypt;
4846
4847                 dw->buf = server->smallbuf;
4848                 server->smallbuf = (char *)cifs_small_buf_get();
4849
4850                 INIT_WORK(&dw->decrypt, smb2_decrypt_offload);
4851
4852                 dw->npages = npages;
4853                 dw->server = server;
4854                 dw->ppages = pages;
4855                 dw->len = len;
4856                 queue_work(decrypt_wq, &dw->decrypt);
4857                 *num_mids = 0; /* worker thread takes care of finding mid */
4858                 return -1;
4859         }
4860
4861 non_offloaded_decrypt:
4862         rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size,
4863                               pages, npages, len, false);
4864         if (rc)
4865                 goto free_pages;
4866
4867         *mid = smb2_find_mid(server, buf);
4868         if (*mid == NULL)
4869                 cifs_dbg(FYI, "mid not found\n");
4870         else {
4871                 cifs_dbg(FYI, "mid found\n");
4872                 (*mid)->decrypted = true;
4873                 rc = handle_read_data(server, *mid, buf,
4874                                       server->vals->read_rsp_size,
4875                                       pages, npages, len, false);
4876         }
4877
4878 free_pages:
4879         for (i = i - 1; i >= 0; i--)
4880                 put_page(pages[i]);
4881         kfree(pages);
4882         return rc;
4883 discard_data:
4884         cifs_discard_remaining_data(server);
4885         goto free_pages;
4886 }
4887
4888 static int
4889 receive_encrypted_standard(struct TCP_Server_Info *server,
4890                            struct mid_q_entry **mids, char **bufs,
4891                            int *num_mids)
4892 {
4893         int ret, length;
4894         char *buf = server->smallbuf;
4895         struct smb2_sync_hdr *shdr;
4896         unsigned int pdu_length = server->pdu_size;
4897         unsigned int buf_size;
4898         unsigned int next_cmd;
4899         struct mid_q_entry *mid_entry;
4900         int next_is_large;
4901         char *next_buffer = NULL;
4902
4903         *num_mids = 0;
4904
4905         /* switch to large buffer if too big for a small one */
4906         if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) {
4907                 server->large_buf = true;
4908                 memcpy(server->bigbuf, buf, server->total_read);
4909                 buf = server->bigbuf;
4910         }
4911
4912         /* now read the rest */
4913         length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
4914                                 pdu_length - HEADER_SIZE(server) + 1);
4915         if (length < 0)
4916                 return length;
4917         server->total_read += length;
4918
4919         buf_size = pdu_length - sizeof(struct smb2_transform_hdr);
4920         length = decrypt_raw_data(server, buf, buf_size, NULL, 0, 0, false);
4921         if (length)
4922                 return length;
4923
4924         next_is_large = server->large_buf;
4925 one_more:
4926         shdr = (struct smb2_sync_hdr *)buf;
4927         next_cmd = le32_to_cpu(shdr->NextCommand);
4928         if (next_cmd) {
4929                 if (WARN_ON_ONCE(next_cmd > pdu_length))
4930                         return -1;
4931                 if (next_is_large)
4932                         next_buffer = (char *)cifs_buf_get();
4933                 else
4934                         next_buffer = (char *)cifs_small_buf_get();
4935                 memcpy(next_buffer, buf + next_cmd, pdu_length - next_cmd);
4936         }
4937
4938         mid_entry = smb2_find_mid(server, buf);
4939         if (mid_entry == NULL)
4940                 cifs_dbg(FYI, "mid not found\n");
4941         else {
4942                 cifs_dbg(FYI, "mid found\n");
4943                 mid_entry->decrypted = true;
4944                 mid_entry->resp_buf_size = server->pdu_size;
4945         }
4946
4947         if (*num_mids >= MAX_COMPOUND) {
4948                 cifs_server_dbg(VFS, "too many PDUs in compound\n");
4949                 return -1;
4950         }
4951         bufs[*num_mids] = buf;
4952         mids[(*num_mids)++] = mid_entry;
4953
4954         if (mid_entry && mid_entry->handle)
4955                 ret = mid_entry->handle(server, mid_entry);
4956         else
4957                 ret = cifs_handle_standard(server, mid_entry);
4958
4959         if (ret == 0 && next_cmd) {
4960                 pdu_length -= next_cmd;
4961                 server->large_buf = next_is_large;
4962                 if (next_is_large)
4963                         server->bigbuf = buf = next_buffer;
4964                 else
4965                         server->smallbuf = buf = next_buffer;
4966                 goto one_more;
4967         } else if (ret != 0) {
4968                 /*
4969                  * ret != 0 here means that we didn't get to handle_mid() thus
4970                  * server->smallbuf and server->bigbuf are still valid. We need
4971                  * to free next_buffer because it is not going to be used
4972                  * anywhere.
4973                  */
4974                 if (next_is_large)
4975                         free_rsp_buf(CIFS_LARGE_BUFFER, next_buffer);
4976                 else
4977                         free_rsp_buf(CIFS_SMALL_BUFFER, next_buffer);
4978         }
4979
4980         return ret;
4981 }
4982
4983 static int
4984 smb3_receive_transform(struct TCP_Server_Info *server,
4985                        struct mid_q_entry **mids, char **bufs, int *num_mids)
4986 {
4987         char *buf = server->smallbuf;
4988         unsigned int pdu_length = server->pdu_size;
4989         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
4990         unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
4991
4992         if (pdu_length < sizeof(struct smb2_transform_hdr) +
4993                                                 sizeof(struct smb2_sync_hdr)) {
4994                 cifs_server_dbg(VFS, "Transform message is too small (%u)\n",
4995                          pdu_length);
4996                 cifs_reconnect(server);
4997                 return -ECONNABORTED;
4998         }
4999
5000         if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) {
5001                 cifs_server_dbg(VFS, "Transform message is broken\n");
5002                 cifs_reconnect(server);
5003                 return -ECONNABORTED;
5004         }
5005
5006         /* TODO: add support for compounds containing READ. */
5007         if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server)) {
5008                 return receive_encrypted_read(server, &mids[0], num_mids);
5009         }
5010
5011         return receive_encrypted_standard(server, mids, bufs, num_mids);
5012 }
5013
5014 int
5015 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid)
5016 {
5017         char *buf = server->large_buf ? server->bigbuf : server->smallbuf;
5018
5019         return handle_read_data(server, mid, buf, server->pdu_size,
5020                                 NULL, 0, 0, false);
5021 }
5022
5023 static int
5024 smb2_next_header(char *buf)
5025 {
5026         struct smb2_sync_hdr *hdr = (struct smb2_sync_hdr *)buf;
5027         struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf;
5028
5029         if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM)
5030                 return sizeof(struct smb2_transform_hdr) +
5031                   le32_to_cpu(t_hdr->OriginalMessageSize);
5032
5033         return le32_to_cpu(hdr->NextCommand);
5034 }
5035
5036 static int
5037 smb2_make_node(unsigned int xid, struct inode *inode,
5038                struct dentry *dentry, struct cifs_tcon *tcon,
5039                char *full_path, umode_t mode, dev_t dev)
5040 {
5041         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
5042         int rc = -EPERM;
5043         FILE_ALL_INFO *buf = NULL;
5044         struct cifs_io_parms io_parms = {0};
5045         __u32 oplock = 0;
5046         struct cifs_fid fid;
5047         struct cifs_open_parms oparms;
5048         unsigned int bytes_written;
5049         struct win_dev *pdev;
5050         struct kvec iov[2];
5051
5052         /*
5053          * Check if mounted with mount parm 'sfu' mount parm.
5054          * SFU emulation should work with all servers, but only
5055          * supports block and char device (no socket & fifo),
5056          * and was used by default in earlier versions of Windows
5057          */
5058         if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL))
5059                 goto out;
5060
5061         /*
5062          * TODO: Add ability to create instead via reparse point. Windows (e.g.
5063          * their current NFS server) uses this approach to expose special files
5064          * over SMB2/SMB3 and Samba will do this with SMB3.1.1 POSIX Extensions
5065          */
5066
5067         if (!S_ISCHR(mode) && !S_ISBLK(mode))
5068                 goto out;
5069
5070         cifs_dbg(FYI, "sfu compat create special file\n");
5071
5072         buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
5073         if (buf == NULL) {
5074                 rc = -ENOMEM;
5075                 goto out;
5076         }
5077
5078         oparms.tcon = tcon;
5079         oparms.cifs_sb = cifs_sb;
5080         oparms.desired_access = GENERIC_WRITE;
5081         oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR |
5082                                                     CREATE_OPTION_SPECIAL);
5083         oparms.disposition = FILE_CREATE;
5084         oparms.path = full_path;
5085         oparms.fid = &fid;
5086         oparms.reconnect = false;
5087
5088         if (tcon->ses->server->oplocks)
5089                 oplock = REQ_OPLOCK;
5090         else
5091                 oplock = 0;
5092         rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, buf);
5093         if (rc)
5094                 goto out;
5095
5096         /*
5097          * BB Do not bother to decode buf since no local inode yet to put
5098          * timestamps in, but we can reuse it safely.
5099          */
5100
5101         pdev = (struct win_dev *)buf;
5102         io_parms.pid = current->tgid;
5103         io_parms.tcon = tcon;
5104         io_parms.offset = 0;
5105         io_parms.length = sizeof(struct win_dev);
5106         iov[1].iov_base = buf;
5107         iov[1].iov_len = sizeof(struct win_dev);
5108         if (S_ISCHR(mode)) {
5109                 memcpy(pdev->type, "IntxCHR", 8);
5110                 pdev->major = cpu_to_le64(MAJOR(dev));
5111                 pdev->minor = cpu_to_le64(MINOR(dev));
5112                 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
5113                                                         &bytes_written, iov, 1);
5114         } else if (S_ISBLK(mode)) {
5115                 memcpy(pdev->type, "IntxBLK", 8);
5116                 pdev->major = cpu_to_le64(MAJOR(dev));
5117                 pdev->minor = cpu_to_le64(MINOR(dev));
5118                 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
5119                                                         &bytes_written, iov, 1);
5120         }
5121         tcon->ses->server->ops->close(xid, tcon, &fid);
5122         d_drop(dentry);
5123
5124         /* FIXME: add code here to set EAs */
5125 out:
5126         kfree(buf);
5127         return rc;
5128 }
5129
5130 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
5131 struct smb_version_operations smb20_operations = {
5132         .compare_fids = smb2_compare_fids,
5133         .setup_request = smb2_setup_request,
5134         .setup_async_request = smb2_setup_async_request,
5135         .check_receive = smb2_check_receive,
5136         .add_credits = smb2_add_credits,
5137         .set_credits = smb2_set_credits,
5138         .get_credits_field = smb2_get_credits_field,
5139         .get_credits = smb2_get_credits,
5140         .wait_mtu_credits = cifs_wait_mtu_credits,
5141         .get_next_mid = smb2_get_next_mid,
5142         .revert_current_mid = smb2_revert_current_mid,
5143         .read_data_offset = smb2_read_data_offset,
5144         .read_data_length = smb2_read_data_length,
5145         .map_error = map_smb2_to_linux_error,
5146         .find_mid = smb2_find_mid,
5147         .check_message = smb2_check_message,
5148         .dump_detail = smb2_dump_detail,
5149         .clear_stats = smb2_clear_stats,
5150         .print_stats = smb2_print_stats,
5151         .is_oplock_break = smb2_is_valid_oplock_break,
5152         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5153         .downgrade_oplock = smb2_downgrade_oplock,
5154         .need_neg = smb2_need_neg,
5155         .negotiate = smb2_negotiate,
5156         .negotiate_wsize = smb2_negotiate_wsize,
5157         .negotiate_rsize = smb2_negotiate_rsize,
5158         .sess_setup = SMB2_sess_setup,
5159         .logoff = SMB2_logoff,
5160         .tree_connect = SMB2_tcon,
5161         .tree_disconnect = SMB2_tdis,
5162         .qfs_tcon = smb2_qfs_tcon,
5163         .is_path_accessible = smb2_is_path_accessible,
5164         .can_echo = smb2_can_echo,
5165         .echo = SMB2_echo,
5166         .query_path_info = smb2_query_path_info,
5167         .get_srv_inum = smb2_get_srv_inum,
5168         .query_file_info = smb2_query_file_info,
5169         .set_path_size = smb2_set_path_size,
5170         .set_file_size = smb2_set_file_size,
5171         .set_file_info = smb2_set_file_info,
5172         .set_compression = smb2_set_compression,
5173         .mkdir = smb2_mkdir,
5174         .mkdir_setinfo = smb2_mkdir_setinfo,
5175         .rmdir = smb2_rmdir,
5176         .unlink = smb2_unlink,
5177         .rename = smb2_rename_path,
5178         .create_hardlink = smb2_create_hardlink,
5179         .query_symlink = smb2_query_symlink,
5180         .query_mf_symlink = smb3_query_mf_symlink,
5181         .create_mf_symlink = smb3_create_mf_symlink,
5182         .open = smb2_open_file,
5183         .set_fid = smb2_set_fid,
5184         .close = smb2_close_file,
5185         .flush = smb2_flush_file,
5186         .async_readv = smb2_async_readv,
5187         .async_writev = smb2_async_writev,
5188         .sync_read = smb2_sync_read,
5189         .sync_write = smb2_sync_write,
5190         .query_dir_first = smb2_query_dir_first,
5191         .query_dir_next = smb2_query_dir_next,
5192         .close_dir = smb2_close_dir,
5193         .calc_smb_size = smb2_calc_size,
5194         .is_status_pending = smb2_is_status_pending,
5195         .is_session_expired = smb2_is_session_expired,
5196         .oplock_response = smb2_oplock_response,
5197         .queryfs = smb2_queryfs,
5198         .mand_lock = smb2_mand_lock,
5199         .mand_unlock_range = smb2_unlock_range,
5200         .push_mand_locks = smb2_push_mandatory_locks,
5201         .get_lease_key = smb2_get_lease_key,
5202         .set_lease_key = smb2_set_lease_key,
5203         .new_lease_key = smb2_new_lease_key,
5204         .calc_signature = smb2_calc_signature,
5205         .is_read_op = smb2_is_read_op,
5206         .set_oplock_level = smb2_set_oplock_level,
5207         .create_lease_buf = smb2_create_lease_buf,
5208         .parse_lease_buf = smb2_parse_lease_buf,
5209         .copychunk_range = smb2_copychunk_range,
5210         .wp_retry_size = smb2_wp_retry_size,
5211         .dir_needs_close = smb2_dir_needs_close,
5212         .get_dfs_refer = smb2_get_dfs_refer,
5213         .select_sectype = smb2_select_sectype,
5214 #ifdef CONFIG_CIFS_XATTR
5215         .query_all_EAs = smb2_query_eas,
5216         .set_EA = smb2_set_ea,
5217 #endif /* CIFS_XATTR */
5218         .get_acl = get_smb2_acl,
5219         .get_acl_by_fid = get_smb2_acl_by_fid,
5220         .set_acl = set_smb2_acl,
5221         .next_header = smb2_next_header,
5222         .ioctl_query_info = smb2_ioctl_query_info,
5223         .make_node = smb2_make_node,
5224         .fiemap = smb3_fiemap,
5225         .llseek = smb3_llseek,
5226         .is_status_io_timeout = smb2_is_status_io_timeout,
5227 };
5228 #endif /* CIFS_ALLOW_INSECURE_LEGACY */
5229
5230 struct smb_version_operations smb21_operations = {
5231         .compare_fids = smb2_compare_fids,
5232         .setup_request = smb2_setup_request,
5233         .setup_async_request = smb2_setup_async_request,
5234         .check_receive = smb2_check_receive,
5235         .add_credits = smb2_add_credits,
5236         .set_credits = smb2_set_credits,
5237         .get_credits_field = smb2_get_credits_field,
5238         .get_credits = smb2_get_credits,
5239         .wait_mtu_credits = smb2_wait_mtu_credits,
5240         .adjust_credits = smb2_adjust_credits,
5241         .get_next_mid = smb2_get_next_mid,
5242         .revert_current_mid = smb2_revert_current_mid,
5243         .read_data_offset = smb2_read_data_offset,
5244         .read_data_length = smb2_read_data_length,
5245         .map_error = map_smb2_to_linux_error,
5246         .find_mid = smb2_find_mid,
5247         .check_message = smb2_check_message,
5248         .dump_detail = smb2_dump_detail,
5249         .clear_stats = smb2_clear_stats,
5250         .print_stats = smb2_print_stats,
5251         .is_oplock_break = smb2_is_valid_oplock_break,
5252         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5253         .downgrade_oplock = smb2_downgrade_oplock,
5254         .need_neg = smb2_need_neg,
5255         .negotiate = smb2_negotiate,
5256         .negotiate_wsize = smb2_negotiate_wsize,
5257         .negotiate_rsize = smb2_negotiate_rsize,
5258         .sess_setup = SMB2_sess_setup,
5259         .logoff = SMB2_logoff,
5260         .tree_connect = SMB2_tcon,
5261         .tree_disconnect = SMB2_tdis,
5262         .qfs_tcon = smb2_qfs_tcon,
5263         .is_path_accessible = smb2_is_path_accessible,
5264         .can_echo = smb2_can_echo,
5265         .echo = SMB2_echo,
5266         .query_path_info = smb2_query_path_info,
5267         .get_srv_inum = smb2_get_srv_inum,
5268         .query_file_info = smb2_query_file_info,
5269         .set_path_size = smb2_set_path_size,
5270         .set_file_size = smb2_set_file_size,
5271         .set_file_info = smb2_set_file_info,
5272         .set_compression = smb2_set_compression,
5273         .mkdir = smb2_mkdir,
5274         .mkdir_setinfo = smb2_mkdir_setinfo,
5275         .rmdir = smb2_rmdir,
5276         .unlink = smb2_unlink,
5277         .rename = smb2_rename_path,
5278         .create_hardlink = smb2_create_hardlink,
5279         .query_symlink = smb2_query_symlink,
5280         .query_mf_symlink = smb3_query_mf_symlink,
5281         .create_mf_symlink = smb3_create_mf_symlink,
5282         .open = smb2_open_file,
5283         .set_fid = smb2_set_fid,
5284         .close = smb2_close_file,
5285         .flush = smb2_flush_file,
5286         .async_readv = smb2_async_readv,
5287         .async_writev = smb2_async_writev,
5288         .sync_read = smb2_sync_read,
5289         .sync_write = smb2_sync_write,
5290         .query_dir_first = smb2_query_dir_first,
5291         .query_dir_next = smb2_query_dir_next,
5292         .close_dir = smb2_close_dir,
5293         .calc_smb_size = smb2_calc_size,
5294         .is_status_pending = smb2_is_status_pending,
5295         .is_session_expired = smb2_is_session_expired,
5296         .oplock_response = smb2_oplock_response,
5297         .queryfs = smb2_queryfs,
5298         .mand_lock = smb2_mand_lock,
5299         .mand_unlock_range = smb2_unlock_range,
5300         .push_mand_locks = smb2_push_mandatory_locks,
5301         .get_lease_key = smb2_get_lease_key,
5302         .set_lease_key = smb2_set_lease_key,
5303         .new_lease_key = smb2_new_lease_key,
5304         .calc_signature = smb2_calc_signature,
5305         .is_read_op = smb21_is_read_op,
5306         .set_oplock_level = smb21_set_oplock_level,
5307         .create_lease_buf = smb2_create_lease_buf,
5308         .parse_lease_buf = smb2_parse_lease_buf,
5309         .copychunk_range = smb2_copychunk_range,
5310         .wp_retry_size = smb2_wp_retry_size,
5311         .dir_needs_close = smb2_dir_needs_close,
5312         .enum_snapshots = smb3_enum_snapshots,
5313         .notify = smb3_notify,
5314         .get_dfs_refer = smb2_get_dfs_refer,
5315         .select_sectype = smb2_select_sectype,
5316 #ifdef CONFIG_CIFS_XATTR
5317         .query_all_EAs = smb2_query_eas,
5318         .set_EA = smb2_set_ea,
5319 #endif /* CIFS_XATTR */
5320         .get_acl = get_smb2_acl,
5321         .get_acl_by_fid = get_smb2_acl_by_fid,
5322         .set_acl = set_smb2_acl,
5323         .next_header = smb2_next_header,
5324         .ioctl_query_info = smb2_ioctl_query_info,
5325         .make_node = smb2_make_node,
5326         .fiemap = smb3_fiemap,
5327         .llseek = smb3_llseek,
5328         .is_status_io_timeout = smb2_is_status_io_timeout,
5329 };
5330
5331 struct smb_version_operations smb30_operations = {
5332         .compare_fids = smb2_compare_fids,
5333         .setup_request = smb2_setup_request,
5334         .setup_async_request = smb2_setup_async_request,
5335         .check_receive = smb2_check_receive,
5336         .add_credits = smb2_add_credits,
5337         .set_credits = smb2_set_credits,
5338         .get_credits_field = smb2_get_credits_field,
5339         .get_credits = smb2_get_credits,
5340         .wait_mtu_credits = smb2_wait_mtu_credits,
5341         .adjust_credits = smb2_adjust_credits,
5342         .get_next_mid = smb2_get_next_mid,
5343         .revert_current_mid = smb2_revert_current_mid,
5344         .read_data_offset = smb2_read_data_offset,
5345         .read_data_length = smb2_read_data_length,
5346         .map_error = map_smb2_to_linux_error,
5347         .find_mid = smb2_find_mid,
5348         .check_message = smb2_check_message,
5349         .dump_detail = smb2_dump_detail,
5350         .clear_stats = smb2_clear_stats,
5351         .print_stats = smb2_print_stats,
5352         .dump_share_caps = smb2_dump_share_caps,
5353         .is_oplock_break = smb2_is_valid_oplock_break,
5354         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5355         .downgrade_oplock = smb3_downgrade_oplock,
5356         .need_neg = smb2_need_neg,
5357         .negotiate = smb2_negotiate,
5358         .negotiate_wsize = smb3_negotiate_wsize,
5359         .negotiate_rsize = smb3_negotiate_rsize,
5360         .sess_setup = SMB2_sess_setup,
5361         .logoff = SMB2_logoff,
5362         .tree_connect = SMB2_tcon,
5363         .tree_disconnect = SMB2_tdis,
5364         .qfs_tcon = smb3_qfs_tcon,
5365         .is_path_accessible = smb2_is_path_accessible,
5366         .can_echo = smb2_can_echo,
5367         .echo = SMB2_echo,
5368         .query_path_info = smb2_query_path_info,
5369         /* WSL tags introduced long after smb2.1, enable for SMB3, 3.11 only */
5370         .query_reparse_tag = smb2_query_reparse_tag,
5371         .get_srv_inum = smb2_get_srv_inum,
5372         .query_file_info = smb2_query_file_info,
5373         .set_path_size = smb2_set_path_size,
5374         .set_file_size = smb2_set_file_size,
5375         .set_file_info = smb2_set_file_info,
5376         .set_compression = smb2_set_compression,
5377         .mkdir = smb2_mkdir,
5378         .mkdir_setinfo = smb2_mkdir_setinfo,
5379         .rmdir = smb2_rmdir,
5380         .unlink = smb2_unlink,
5381         .rename = smb2_rename_path,
5382         .create_hardlink = smb2_create_hardlink,
5383         .query_symlink = smb2_query_symlink,
5384         .query_mf_symlink = smb3_query_mf_symlink,
5385         .create_mf_symlink = smb3_create_mf_symlink,
5386         .open = smb2_open_file,
5387         .set_fid = smb2_set_fid,
5388         .close = smb2_close_file,
5389         .close_getattr = smb2_close_getattr,
5390         .flush = smb2_flush_file,
5391         .async_readv = smb2_async_readv,
5392         .async_writev = smb2_async_writev,
5393         .sync_read = smb2_sync_read,
5394         .sync_write = smb2_sync_write,
5395         .query_dir_first = smb2_query_dir_first,
5396         .query_dir_next = smb2_query_dir_next,
5397         .close_dir = smb2_close_dir,
5398         .calc_smb_size = smb2_calc_size,
5399         .is_status_pending = smb2_is_status_pending,
5400         .is_session_expired = smb2_is_session_expired,
5401         .oplock_response = smb2_oplock_response,
5402         .queryfs = smb2_queryfs,
5403         .mand_lock = smb2_mand_lock,
5404         .mand_unlock_range = smb2_unlock_range,
5405         .push_mand_locks = smb2_push_mandatory_locks,
5406         .get_lease_key = smb2_get_lease_key,
5407         .set_lease_key = smb2_set_lease_key,
5408         .new_lease_key = smb2_new_lease_key,
5409         .generate_signingkey = generate_smb30signingkey,
5410         .calc_signature = smb3_calc_signature,
5411         .set_integrity  = smb3_set_integrity,
5412         .is_read_op = smb21_is_read_op,
5413         .set_oplock_level = smb3_set_oplock_level,
5414         .create_lease_buf = smb3_create_lease_buf,
5415         .parse_lease_buf = smb3_parse_lease_buf,
5416         .copychunk_range = smb2_copychunk_range,
5417         .duplicate_extents = smb2_duplicate_extents,
5418         .validate_negotiate = smb3_validate_negotiate,
5419         .wp_retry_size = smb2_wp_retry_size,
5420         .dir_needs_close = smb2_dir_needs_close,
5421         .fallocate = smb3_fallocate,
5422         .enum_snapshots = smb3_enum_snapshots,
5423         .notify = smb3_notify,
5424         .init_transform_rq = smb3_init_transform_rq,
5425         .is_transform_hdr = smb3_is_transform_hdr,
5426         .receive_transform = smb3_receive_transform,
5427         .get_dfs_refer = smb2_get_dfs_refer,
5428         .select_sectype = smb2_select_sectype,
5429 #ifdef CONFIG_CIFS_XATTR
5430         .query_all_EAs = smb2_query_eas,
5431         .set_EA = smb2_set_ea,
5432 #endif /* CIFS_XATTR */
5433         .get_acl = get_smb2_acl,
5434         .get_acl_by_fid = get_smb2_acl_by_fid,
5435         .set_acl = set_smb2_acl,
5436         .next_header = smb2_next_header,
5437         .ioctl_query_info = smb2_ioctl_query_info,
5438         .make_node = smb2_make_node,
5439         .fiemap = smb3_fiemap,
5440         .llseek = smb3_llseek,
5441         .is_status_io_timeout = smb2_is_status_io_timeout,
5442 };
5443
5444 struct smb_version_operations smb311_operations = {
5445         .compare_fids = smb2_compare_fids,
5446         .setup_request = smb2_setup_request,
5447         .setup_async_request = smb2_setup_async_request,
5448         .check_receive = smb2_check_receive,
5449         .add_credits = smb2_add_credits,
5450         .set_credits = smb2_set_credits,
5451         .get_credits_field = smb2_get_credits_field,
5452         .get_credits = smb2_get_credits,
5453         .wait_mtu_credits = smb2_wait_mtu_credits,
5454         .adjust_credits = smb2_adjust_credits,
5455         .get_next_mid = smb2_get_next_mid,
5456         .revert_current_mid = smb2_revert_current_mid,
5457         .read_data_offset = smb2_read_data_offset,
5458         .read_data_length = smb2_read_data_length,
5459         .map_error = map_smb2_to_linux_error,
5460         .find_mid = smb2_find_mid,
5461         .check_message = smb2_check_message,
5462         .dump_detail = smb2_dump_detail,
5463         .clear_stats = smb2_clear_stats,
5464         .print_stats = smb2_print_stats,
5465         .dump_share_caps = smb2_dump_share_caps,
5466         .is_oplock_break = smb2_is_valid_oplock_break,
5467         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5468         .downgrade_oplock = smb3_downgrade_oplock,
5469         .need_neg = smb2_need_neg,
5470         .negotiate = smb2_negotiate,
5471         .negotiate_wsize = smb3_negotiate_wsize,
5472         .negotiate_rsize = smb3_negotiate_rsize,
5473         .sess_setup = SMB2_sess_setup,
5474         .logoff = SMB2_logoff,
5475         .tree_connect = SMB2_tcon,
5476         .tree_disconnect = SMB2_tdis,
5477         .qfs_tcon = smb3_qfs_tcon,
5478         .is_path_accessible = smb2_is_path_accessible,
5479         .can_echo = smb2_can_echo,
5480         .echo = SMB2_echo,
5481         .query_path_info = smb2_query_path_info,
5482         .query_reparse_tag = smb2_query_reparse_tag,
5483         .get_srv_inum = smb2_get_srv_inum,
5484         .query_file_info = smb2_query_file_info,
5485         .set_path_size = smb2_set_path_size,
5486         .set_file_size = smb2_set_file_size,
5487         .set_file_info = smb2_set_file_info,
5488         .set_compression = smb2_set_compression,
5489         .mkdir = smb2_mkdir,
5490         .mkdir_setinfo = smb2_mkdir_setinfo,
5491         .posix_mkdir = smb311_posix_mkdir,
5492         .rmdir = smb2_rmdir,
5493         .unlink = smb2_unlink,
5494         .rename = smb2_rename_path,
5495         .create_hardlink = smb2_create_hardlink,
5496         .query_symlink = smb2_query_symlink,
5497         .query_mf_symlink = smb3_query_mf_symlink,
5498         .create_mf_symlink = smb3_create_mf_symlink,
5499         .open = smb2_open_file,
5500         .set_fid = smb2_set_fid,
5501         .close = smb2_close_file,
5502         .close_getattr = smb2_close_getattr,
5503         .flush = smb2_flush_file,
5504         .async_readv = smb2_async_readv,
5505         .async_writev = smb2_async_writev,
5506         .sync_read = smb2_sync_read,
5507         .sync_write = smb2_sync_write,
5508         .query_dir_first = smb2_query_dir_first,
5509         .query_dir_next = smb2_query_dir_next,
5510         .close_dir = smb2_close_dir,
5511         .calc_smb_size = smb2_calc_size,
5512         .is_status_pending = smb2_is_status_pending,
5513         .is_session_expired = smb2_is_session_expired,
5514         .oplock_response = smb2_oplock_response,
5515         .queryfs = smb311_queryfs,
5516         .mand_lock = smb2_mand_lock,
5517         .mand_unlock_range = smb2_unlock_range,
5518         .push_mand_locks = smb2_push_mandatory_locks,
5519         .get_lease_key = smb2_get_lease_key,
5520         .set_lease_key = smb2_set_lease_key,
5521         .new_lease_key = smb2_new_lease_key,
5522         .generate_signingkey = generate_smb311signingkey,
5523         .calc_signature = smb3_calc_signature,
5524         .set_integrity  = smb3_set_integrity,
5525         .is_read_op = smb21_is_read_op,
5526         .set_oplock_level = smb3_set_oplock_level,
5527         .create_lease_buf = smb3_create_lease_buf,
5528         .parse_lease_buf = smb3_parse_lease_buf,
5529         .copychunk_range = smb2_copychunk_range,
5530         .duplicate_extents = smb2_duplicate_extents,
5531 /*      .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
5532         .wp_retry_size = smb2_wp_retry_size,
5533         .dir_needs_close = smb2_dir_needs_close,
5534         .fallocate = smb3_fallocate,
5535         .enum_snapshots = smb3_enum_snapshots,
5536         .notify = smb3_notify,
5537         .init_transform_rq = smb3_init_transform_rq,
5538         .is_transform_hdr = smb3_is_transform_hdr,
5539         .receive_transform = smb3_receive_transform,
5540         .get_dfs_refer = smb2_get_dfs_refer,
5541         .select_sectype = smb2_select_sectype,
5542 #ifdef CONFIG_CIFS_XATTR
5543         .query_all_EAs = smb2_query_eas,
5544         .set_EA = smb2_set_ea,
5545 #endif /* CIFS_XATTR */
5546         .get_acl = get_smb2_acl,
5547         .get_acl_by_fid = get_smb2_acl_by_fid,
5548         .set_acl = set_smb2_acl,
5549         .next_header = smb2_next_header,
5550         .ioctl_query_info = smb2_ioctl_query_info,
5551         .make_node = smb2_make_node,
5552         .fiemap = smb3_fiemap,
5553         .llseek = smb3_llseek,
5554         .is_status_io_timeout = smb2_is_status_io_timeout,
5555 };
5556
5557 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
5558 struct smb_version_values smb20_values = {
5559         .version_string = SMB20_VERSION_STRING,
5560         .protocol_id = SMB20_PROT_ID,
5561         .req_capabilities = 0, /* MBZ */
5562         .large_lock_type = 0,
5563         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5564         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5565         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5566         .header_size = sizeof(struct smb2_sync_hdr),
5567         .header_preamble_size = 0,
5568         .max_header_size = MAX_SMB2_HDR_SIZE,
5569         .read_rsp_size = sizeof(struct smb2_read_rsp),
5570         .lock_cmd = SMB2_LOCK,
5571         .cap_unix = 0,
5572         .cap_nt_find = SMB2_NT_FIND,
5573         .cap_large_files = SMB2_LARGE_FILES,
5574         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5575         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5576         .create_lease_size = sizeof(struct create_lease),
5577 };
5578 #endif /* ALLOW_INSECURE_LEGACY */
5579
5580 struct smb_version_values smb21_values = {
5581         .version_string = SMB21_VERSION_STRING,
5582         .protocol_id = SMB21_PROT_ID,
5583         .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
5584         .large_lock_type = 0,
5585         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5586         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5587         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5588         .header_size = sizeof(struct smb2_sync_hdr),
5589         .header_preamble_size = 0,
5590         .max_header_size = MAX_SMB2_HDR_SIZE,
5591         .read_rsp_size = sizeof(struct smb2_read_rsp),
5592         .lock_cmd = SMB2_LOCK,
5593         .cap_unix = 0,
5594         .cap_nt_find = SMB2_NT_FIND,
5595         .cap_large_files = SMB2_LARGE_FILES,
5596         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5597         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5598         .create_lease_size = sizeof(struct create_lease),
5599 };
5600
5601 struct smb_version_values smb3any_values = {
5602         .version_string = SMB3ANY_VERSION_STRING,
5603         .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
5604         .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,
5605         .large_lock_type = 0,
5606         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5607         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5608         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5609         .header_size = sizeof(struct smb2_sync_hdr),
5610         .header_preamble_size = 0,
5611         .max_header_size = MAX_SMB2_HDR_SIZE,
5612         .read_rsp_size = sizeof(struct smb2_read_rsp),
5613         .lock_cmd = SMB2_LOCK,
5614         .cap_unix = 0,
5615         .cap_nt_find = SMB2_NT_FIND,
5616         .cap_large_files = SMB2_LARGE_FILES,
5617         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5618         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5619         .create_lease_size = sizeof(struct create_lease_v2),
5620 };
5621
5622 struct smb_version_values smbdefault_values = {
5623         .version_string = SMBDEFAULT_VERSION_STRING,
5624         .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
5625         .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,
5626         .large_lock_type = 0,
5627         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5628         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5629         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5630         .header_size = sizeof(struct smb2_sync_hdr),
5631         .header_preamble_size = 0,
5632         .max_header_size = MAX_SMB2_HDR_SIZE,
5633         .read_rsp_size = sizeof(struct smb2_read_rsp),
5634         .lock_cmd = SMB2_LOCK,
5635         .cap_unix = 0,
5636         .cap_nt_find = SMB2_NT_FIND,
5637         .cap_large_files = SMB2_LARGE_FILES,
5638         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5639         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5640         .create_lease_size = sizeof(struct create_lease_v2),
5641 };
5642
5643 struct smb_version_values smb30_values = {
5644         .version_string = SMB30_VERSION_STRING,
5645         .protocol_id = SMB30_PROT_ID,
5646         .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,
5647         .large_lock_type = 0,
5648         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5649         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5650         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5651         .header_size = sizeof(struct smb2_sync_hdr),
5652         .header_preamble_size = 0,
5653         .max_header_size = MAX_SMB2_HDR_SIZE,
5654         .read_rsp_size = sizeof(struct smb2_read_rsp),
5655         .lock_cmd = SMB2_LOCK,
5656         .cap_unix = 0,
5657         .cap_nt_find = SMB2_NT_FIND,
5658         .cap_large_files = SMB2_LARGE_FILES,
5659         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5660         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5661         .create_lease_size = sizeof(struct create_lease_v2),
5662 };
5663
5664 struct smb_version_values smb302_values = {
5665         .version_string = SMB302_VERSION_STRING,
5666         .protocol_id = SMB302_PROT_ID,
5667         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
5668         .large_lock_type = 0,
5669         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5670         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5671         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5672         .header_size = sizeof(struct smb2_sync_hdr),
5673         .header_preamble_size = 0,
5674         .max_header_size = MAX_SMB2_HDR_SIZE,
5675         .read_rsp_size = sizeof(struct smb2_read_rsp),
5676         .lock_cmd = SMB2_LOCK,
5677         .cap_unix = 0,
5678         .cap_nt_find = SMB2_NT_FIND,
5679         .cap_large_files = SMB2_LARGE_FILES,
5680         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5681         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5682         .create_lease_size = sizeof(struct create_lease_v2),
5683 };
5684
5685 struct smb_version_values smb311_values = {
5686         .version_string = SMB311_VERSION_STRING,
5687         .protocol_id = SMB311_PROT_ID,
5688         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
5689         .large_lock_type = 0,
5690         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5691         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5692         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5693         .header_size = sizeof(struct smb2_sync_hdr),
5694         .header_preamble_size = 0,
5695         .max_header_size = MAX_SMB2_HDR_SIZE,
5696         .read_rsp_size = sizeof(struct smb2_read_rsp),
5697         .lock_cmd = SMB2_LOCK,
5698         .cap_unix = 0,
5699         .cap_nt_find = SMB2_NT_FIND,
5700         .cap_large_files = SMB2_LARGE_FILES,
5701         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5702         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5703         .create_lease_size = sizeof(struct create_lease_v2),
5704 };