fs/cifs/smb2ops.c

   1 /*
   2  *  SMB2 version specific operations
   3  *
   4  *  Copyright (c) 2012, Jeff Layton <jlayton@redhat.com>
   5  *
   6  *  This library is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License v2 as published
   8  *  by the Free Software Foundation.
   9  *
  10  *  This library is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  13  *  the GNU Lesser General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU Lesser General Public License
  16  *  along with this library; if not, write to the Free Software
  17  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  18  */
  19
  20 #include <linux/pagemap.h>
  21 #include <linux/vfs.h>
  22 #include <linux/falloc.h>
  23 #include <linux/scatterlist.h>
  24 #include <linux/uuid.h>
  25 #include <crypto/aead.h>
  26 #include "cifsglob.h"
  27 #include "smb2pdu.h"
  28 #include "smb2proto.h"
  29 #include "cifsproto.h"
  30 #include "cifs_debug.h"
  31 #include "cifs_unicode.h"
  32 #include "smb2status.h"
  33 #include "smb2glob.h"
  34 #include "cifs_ioctl.h"
  35 #include "smbdirect.h"
  36
  37 static int
  38 change_conf(struct TCP_Server_Info *server)
  39 {
  40         server->credits += server->echo_credits + server->oplock_credits;
  41         server->oplock_credits = server->echo_credits = 0;
  42         switch (server->credits) {
  43         case 0:
  44                 return -1;
  45         case 1:
  46                 server->echoes = false;
  47                 server->oplocks = false;
  48                 cifs_dbg(VFS, "disabling echoes and oplocks\n");
  49                 break;
  50         case 2:
  51                 server->echoes = true;
  52                 server->oplocks = false;
  53                 server->echo_credits = 1;
  54                 cifs_dbg(FYI, "disabling oplocks\n");
  55                 break;
  56         default:
  57                 server->echoes = true;
  58                 if (enable_oplocks) {
  59                         server->oplocks = true;
  60                         server->oplock_credits = 1;
  61                 } else
  62                         server->oplocks = false;
  63
  64                 server->echo_credits = 1;
  65         }
  66         server->credits -= server->echo_credits + server->oplock_credits;
  67         return 0;
  68 }
  69
  70 static void
  71 smb2_add_credits(struct TCP_Server_Info *server, const unsigned int add,
  72                  const int optype)
  73 {
  74         int *val, rc = 0;
  75         spin_lock(&server->req_lock);
  76         val = server->ops->get_credits_field(server, optype);
  77         *val += add;
  78         if (*val > 65000) {
  79                 *val = 65000; /* Don't get near 64K credits, avoid srv bugs */
  80                 printk_once(KERN_WARNING "server overflowed SMB3 credits\n");
  81         }
  82         server->in_flight--;
  83         if (server->in_flight == 0 && (optype & CIFS_OP_MASK) != CIFS_NEG_OP)
  84                 rc = change_conf(server);
  85         /*
  86          * Sometimes server returns 0 credits on oplock break ack - we need to
  87          * rebalance credits in this case.
  88          */
  89         else if (server->in_flight > 0 && server->oplock_credits == 0 &&
  90                  server->oplocks) {
  91                 if (server->credits > 1) {
  92                         server->credits--;
  93                         server->oplock_credits++;
  94                 }
  95         }
  96         spin_unlock(&server->req_lock);
  97         wake_up(&server->request_q);
  98         if (rc)
  99                 cifs_reconnect(server);
 100 }
 101
 102 static void
 103 smb2_set_credits(struct TCP_Server_Info *server, const int val)
 104 {
 105         spin_lock(&server->req_lock);
 106         server->credits = val;
 107         spin_unlock(&server->req_lock);
 108 }
 109
 110 static int *
 111 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
 112 {
 113         switch (optype) {
 114         case CIFS_ECHO_OP:
 115                 return &server->echo_credits;
 116         case CIFS_OBREAK_OP:
 117                 return &server->oplock_credits;
 118         default:
 119                 return &server->credits;
 120         }
 121 }
 122
 123 static unsigned int
 124 smb2_get_credits(struct mid_q_entry *mid)
 125 {
 126         struct smb2_sync_hdr *shdr = get_sync_hdr(mid->resp_buf);
 127
 128         return le16_to_cpu(shdr->CreditRequest);
 129 }
 130
 131 static int
 132 smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
 133                       unsigned int *num, unsigned int *credits)
 134 {
 135         int rc = 0;
 136         unsigned int scredits;
 137
 138         spin_lock(&server->req_lock);
 139         while (1) {
 140                 if (server->credits <= 0) {
 141                         spin_unlock(&server->req_lock);
 142                         cifs_num_waiters_inc(server);
 143                         rc = wait_event_killable(server->request_q,
 144                                         has_credits(server, &server->credits));
 145                         cifs_num_waiters_dec(server);
 146                         if (rc)
 147                                 return rc;
 148                         spin_lock(&server->req_lock);
 149                 } else {
 150                         if (server->tcpStatus == CifsExiting) {
 151                                 spin_unlock(&server->req_lock);
 152                                 return -ENOENT;
 153                         }
 154
 155                         scredits = server->credits;
 156                         /* can deadlock with reopen */
 157                         if (scredits == 1) {
 158                                 *num = SMB2_MAX_BUFFER_SIZE;
 159                                 *credits = 0;
 160                                 break;
 161                         }
 162
 163                         /* leave one credit for a possible reopen */
 164                         scredits--;
 165                         *num = min_t(unsigned int, size,
 166                                      scredits * SMB2_MAX_BUFFER_SIZE);
 167
 168                         *credits = DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE);
 169                         server->credits -= *credits;
 170                         server->in_flight++;
 171                         break;
 172                 }
 173         }
 174         spin_unlock(&server->req_lock);
 175         return rc;
 176 }
 177
 178 static __u64
 179 smb2_get_next_mid(struct TCP_Server_Info *server)
 180 {
 181         __u64 mid;
 182         /* for SMB2 we need the current value */
 183         spin_lock(&GlobalMid_Lock);
 184         mid = server->CurrentMid++;
 185         spin_unlock(&GlobalMid_Lock);
 186         return mid;
 187 }
 188
 189 static struct mid_q_entry *
 190 smb2_find_mid(struct TCP_Server_Info *server, char *buf)
 191 {
 192         struct mid_q_entry *mid;
 193         struct smb2_sync_hdr *shdr = get_sync_hdr(buf);
 194         __u64 wire_mid = le64_to_cpu(shdr->MessageId);
 195
 196         if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
 197                 cifs_dbg(VFS, "encrypted frame parsing not supported yet");
 198                 return NULL;
 199         }
 200
 201         spin_lock(&GlobalMid_Lock);
 202         list_for_each_entry(mid, &server->pending_mid_q, qhead) {
 203                 if ((mid->mid == wire_mid) &&
 204                     (mid->mid_state == MID_REQUEST_SUBMITTED) &&
 205                     (mid->command == shdr->Command)) {
 206                         spin_unlock(&GlobalMid_Lock);
 207                         return mid;
 208                 }
 209         }
 210         spin_unlock(&GlobalMid_Lock);
 211         return NULL;
 212 }
 213
 214 static void
 215 smb2_dump_detail(void *buf)
 216 {
 217 #ifdef CONFIG_CIFS_DEBUG2
 218         struct smb2_sync_hdr *shdr = get_sync_hdr(buf);
 219
 220         cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
 221                  shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId,
 222                  shdr->ProcessId);
 223         cifs_dbg(VFS, "smb buf %p len %u\n", buf, smb2_calc_size(buf));
 224 #endif
 225 }
 226
 227 static bool
 228 smb2_need_neg(struct TCP_Server_Info *server)
 229 {
 230         return server->max_read == 0;
 231 }
 232
 233 static int
 234 smb2_negotiate(const unsigned int xid, struct cifs_ses *ses)
 235 {
 236         int rc;
 237         ses->server->CurrentMid = 0;
 238         rc = SMB2_negotiate(xid, ses);
 239         /* BB we probably don't need to retry with modern servers */
 240         if (rc == -EAGAIN)
 241                 rc = -EHOSTDOWN;
 242         return rc;
 243 }
 244
 245 static unsigned int
 246 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 247 {
 248         struct TCP_Server_Info *server = tcon->ses->server;
 249         unsigned int wsize;
 250
 251         /* start with specified wsize, or default */
 252         wsize = volume_info->wsize ? volume_info->wsize : CIFS_DEFAULT_IOSIZE;
 253         wsize = min_t(unsigned int, wsize, server->max_write);
 254 #ifdef CONFIG_CIFS_SMB_DIRECT
 255         if (server->rdma)
 256                 wsize = min_t(unsigned int,
 257                                 wsize, server->smbd_conn->max_readwrite_size);
 258 #endif
 259         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 260                 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
 261
 262         return wsize;
 263 }
 264
 265 static unsigned int
 266 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 267 {
 268         struct TCP_Server_Info *server = tcon->ses->server;
 269         unsigned int rsize;
 270
 271         /* start with specified rsize, or default */
 272         rsize = volume_info->rsize ? volume_info->rsize : CIFS_DEFAULT_IOSIZE;
 273         rsize = min_t(unsigned int, rsize, server->max_read);
 274 #ifdef CONFIG_CIFS_SMB_DIRECT
 275         if (server->rdma)
 276                 rsize = min_t(unsigned int,
 277                                 rsize, server->smbd_conn->max_readwrite_size);
 278 #endif
 279
 280         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 281                 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
 282
 283         return rsize;
 284 }
 285
 286 #ifdef CONFIG_CIFS_STATS2
 287 static int
 288 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon)
 289 {
 290         int rc;
 291         unsigned int ret_data_len = 0;
 292         struct network_interface_info_ioctl_rsp *out_buf;
 293
 294         rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
 295                         FSCTL_QUERY_NETWORK_INTERFACE_INFO, true /* is_fsctl */,
 296                         NULL /* no data input */, 0 /* no data input */,
 297                         (char **)&out_buf, &ret_data_len);
 298         if (rc != 0)
 299                 cifs_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
 300         else if (ret_data_len < sizeof(struct network_interface_info_ioctl_rsp)) {
 301                 cifs_dbg(VFS, "server returned bad net interface info buf\n");
 302                 rc = -EINVAL;
 303         } else {
 304                 /* Dump info on first interface */
 305                 cifs_dbg(FYI, "Adapter Capability 0x%x\t",
 306                         le32_to_cpu(out_buf->Capability));
 307                 cifs_dbg(FYI, "Link Speed %lld\n",
 308                         le64_to_cpu(out_buf->LinkSpeed));
 309         }
 310         kfree(out_buf);
 311         return rc;
 312 }
 313 #endif /* STATS2 */
 314
 315 static void
 316 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
 317 {
 318         int rc;
 319         __le16 srch_path = 0; /* Null - open root of share */
 320         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 321         struct cifs_open_parms oparms;
 322         struct cifs_fid fid;
 323
 324         oparms.tcon = tcon;
 325         oparms.desired_access = FILE_READ_ATTRIBUTES;
 326         oparms.disposition = FILE_OPEN;
 327         oparms.create_options = 0;
 328         oparms.fid = &fid;
 329         oparms.reconnect = false;
 330
 331         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
 332         if (rc)
 333                 return;
 334
 335 #ifdef CONFIG_CIFS_STATS2
 336         SMB3_request_interfaces(xid, tcon);
 337 #endif /* STATS2 */
 338
 339         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 340                         FS_ATTRIBUTE_INFORMATION);
 341         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 342                         FS_DEVICE_INFORMATION);
 343         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 344                         FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
 345         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 346         return;
 347 }
 348
 349 static void
 350 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
 351 {
 352         int rc;
 353         __le16 srch_path = 0; /* Null - open root of share */
 354         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 355         struct cifs_open_parms oparms;
 356         struct cifs_fid fid;
 357
 358         oparms.tcon = tcon;
 359         oparms.desired_access = FILE_READ_ATTRIBUTES;
 360         oparms.disposition = FILE_OPEN;
 361         oparms.create_options = 0;
 362         oparms.fid = &fid;
 363         oparms.reconnect = false;
 364
 365         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
 366         if (rc)
 367                 return;
 368
 369         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 370                         FS_ATTRIBUTE_INFORMATION);
 371         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 372                         FS_DEVICE_INFORMATION);
 373         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 374         return;
 375 }
 376
 377 static int
 378 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
 379                         struct cifs_sb_info *cifs_sb, const char *full_path)
 380 {
 381         int rc;
 382         __le16 *utf16_path;
 383         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 384         struct cifs_open_parms oparms;
 385         struct cifs_fid fid;
 386
 387         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
 388         if (!utf16_path)
 389                 return -ENOMEM;
 390
 391         oparms.tcon = tcon;
 392         oparms.desired_access = FILE_READ_ATTRIBUTES;
 393         oparms.disposition = FILE_OPEN;
 394         oparms.create_options = 0;
 395         oparms.fid = &fid;
 396         oparms.reconnect = false;
 397
 398         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
 399         if (rc) {
 400                 kfree(utf16_path);
 401                 return rc;
 402         }
 403
 404         rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 405         kfree(utf16_path);
 406         return rc;
 407 }
 408
 409 static int
 410 smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
 411                   struct cifs_sb_info *cifs_sb, const char *full_path,
 412                   u64 *uniqueid, FILE_ALL_INFO *data)
 413 {
 414         *uniqueid = le64_to_cpu(data->IndexNumber);
 415         return 0;
 416 }
 417
 418 static int
 419 smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
 420                      struct cifs_fid *fid, FILE_ALL_INFO *data)
 421 {
 422         int rc;
 423         struct smb2_file_all_info *smb2_data;
 424
 425         smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
 426                             GFP_KERNEL);
 427         if (smb2_data == NULL)
 428                 return -ENOMEM;
 429
 430         rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid,
 431                              smb2_data);
 432         if (!rc)
 433                 move_smb2_info_to_cifs(data, smb2_data);
 434         kfree(smb2_data);
 435         return rc;
 436 }
 437
 438 #ifdef CONFIG_CIFS_XATTR
 439 static ssize_t
 440 move_smb2_ea_to_cifs(char *dst, size_t dst_size,
 441                      struct smb2_file_full_ea_info *src, size_t src_size,
 442                      const unsigned char *ea_name)
 443 {
 444         int rc = 0;
 445         unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0;
 446         char *name, *value;
 447         size_t name_len, value_len, user_name_len;
 448
 449         while (src_size > 0) {
 450                 name = &src->ea_data[0];
 451                 name_len = (size_t)src->ea_name_length;
 452                 value = &src->ea_data[src->ea_name_length + 1];
 453                 value_len = (size_t)le16_to_cpu(src->ea_value_length);
 454
 455                 if (name_len == 0) {
 456                         break;
 457                 }
 458
 459                 if (src_size < 8 + name_len + 1 + value_len) {
 460                         cifs_dbg(FYI, "EA entry goes beyond length of list\n");
 461                         rc = -EIO;
 462                         goto out;
 463                 }
 464
 465                 if (ea_name) {
 466                         if (ea_name_len == name_len &&
 467                             memcmp(ea_name, name, name_len) == 0) {
 468                                 rc = value_len;
 469                                 if (dst_size == 0)
 470                                         goto out;
 471                                 if (dst_size < value_len) {
 472                                         rc = -ERANGE;
 473                                         goto out;
 474                                 }
 475                                 memcpy(dst, value, value_len);
 476                                 goto out;
 477                         }
 478                 } else {
 479                         /* 'user.' plus a terminating null */
 480                         user_name_len = 5 + 1 + name_len;
 481
 482                         rc += user_name_len;
 483
 484                         if (dst_size >= user_name_len) {
 485                                 dst_size -= user_name_len;
 486                                 memcpy(dst, "user.", 5);
 487                                 dst += 5;
 488                                 memcpy(dst, src->ea_data, name_len);
 489                                 dst += name_len;
 490                                 *dst = 0;
 491                                 ++dst;
 492                         } else if (dst_size == 0) {
 493                                 /* skip copy - calc size only */
 494                         } else {
 495                                 /* stop before overrun buffer */
 496                                 rc = -ERANGE;
 497                                 break;
 498                         }
 499                 }
 500
 501                 if (!src->next_entry_offset)
 502                         break;
 503
 504                 if (src_size < le32_to_cpu(src->next_entry_offset)) {
 505                         /* stop before overrun buffer */
 506                         rc = -ERANGE;
 507                         break;
 508                 }
 509                 src_size -= le32_to_cpu(src->next_entry_offset);
 510                 src = (void *)((char *)src +
 511                                le32_to_cpu(src->next_entry_offset));
 512         }
 513
 514         /* didn't find the named attribute */
 515         if (ea_name)
 516                 rc = -ENODATA;
 517
 518 out:
 519         return (ssize_t)rc;
 520 }
 521
 522 static ssize_t
 523 smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
 524                const unsigned char *path, const unsigned char *ea_name,
 525                char *ea_data, size_t buf_size,
 526                struct cifs_sb_info *cifs_sb)
 527 {
 528         int rc;
 529         __le16 *utf16_path;
 530         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 531         struct cifs_open_parms oparms;
 532         struct cifs_fid fid;
 533         struct smb2_file_full_ea_info *smb2_data;
 534         int ea_buf_size = SMB2_MIN_EA_BUF;
 535
 536         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
 537         if (!utf16_path)
 538                 return -ENOMEM;
 539
 540         oparms.tcon = tcon;
 541         oparms.desired_access = FILE_READ_EA;
 542         oparms.disposition = FILE_OPEN;
 543         oparms.create_options = 0;
 544         oparms.fid = &fid;
 545         oparms.reconnect = false;
 546
 547         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
 548         kfree(utf16_path);
 549         if (rc) {
 550                 cifs_dbg(FYI, "open failed rc=%d\n", rc);
 551                 return rc;
 552         }
 553
 554         while (1) {
 555                 smb2_data = kzalloc(ea_buf_size, GFP_KERNEL);
 556                 if (smb2_data == NULL) {
 557                         SMB2_close(xid, tcon, fid.persistent_fid,
 558                                    fid.volatile_fid);
 559                         return -ENOMEM;
 560                 }
 561
 562                 rc = SMB2_query_eas(xid, tcon, fid.persistent_fid,
 563                                     fid.volatile_fid,
 564                                     ea_buf_size, smb2_data);
 565
 566                 if (rc != -E2BIG)
 567                         break;
 568
 569                 kfree(smb2_data);
 570                 ea_buf_size <<= 1;
 571
 572                 if (ea_buf_size > SMB2_MAX_EA_BUF) {
 573                         cifs_dbg(VFS, "EA size is too large\n");
 574                         SMB2_close(xid, tcon, fid.persistent_fid,
 575                                    fid.volatile_fid);
 576                         return -ENOMEM;
 577                 }
 578         }
 579
 580         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 581
 582         if (!rc)
 583                 rc = move_smb2_ea_to_cifs(ea_data, buf_size, smb2_data,
 584                                           SMB2_MAX_EA_BUF, ea_name);
 585
 586         kfree(smb2_data);
 587         return rc;
 588 }
 589
 590
 591 static int
 592 smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
 593             const char *path, const char *ea_name, const void *ea_value,
 594             const __u16 ea_value_len, const struct nls_table *nls_codepage,
 595             struct cifs_sb_info *cifs_sb)
 596 {
 597         int rc;
 598         __le16 *utf16_path;
 599         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 600         struct cifs_open_parms oparms;
 601         struct cifs_fid fid;
 602         struct smb2_file_full_ea_info *ea;
 603         int ea_name_len = strlen(ea_name);
 604         int len;
 605
 606         if (ea_name_len > 255)
 607                 return -EINVAL;
 608
 609         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
 610         if (!utf16_path)
 611                 return -ENOMEM;
 612
 613         oparms.tcon = tcon;
 614         oparms.desired_access = FILE_WRITE_EA;
 615         oparms.disposition = FILE_OPEN;
 616         oparms.create_options = 0;
 617         oparms.fid = &fid;
 618         oparms.reconnect = false;
 619
 620         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
 621         kfree(utf16_path);
 622         if (rc) {
 623                 cifs_dbg(FYI, "open failed rc=%d\n", rc);
 624                 return rc;
 625         }
 626
 627         len = sizeof(ea) + ea_name_len + ea_value_len + 1;
 628         ea = kzalloc(len, GFP_KERNEL);
 629         if (ea == NULL) {
 630                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 631                 return -ENOMEM;
 632         }
 633
 634         ea->ea_name_length = ea_name_len;
 635         ea->ea_value_length = cpu_to_le16(ea_value_len);
 636         memcpy(ea->ea_data, ea_name, ea_name_len + 1);
 637         memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len);
 638
 639         rc = SMB2_set_ea(xid, tcon, fid.persistent_fid, fid.volatile_fid, ea,
 640                          len);
 641         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 642
 643         return rc;
 644 }
 645 #endif
 646
 647 static bool
 648 smb2_can_echo(struct TCP_Server_Info *server)
 649 {
 650         return server->echoes;
 651 }
 652
 653 static void
 654 smb2_clear_stats(struct cifs_tcon *tcon)
 655 {
 656 #ifdef CONFIG_CIFS_STATS
 657         int i;
 658         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
 659                 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
 660                 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
 661         }
 662 #endif
 663 }
 664
 665 static void
 666 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
 667 {
 668         seq_puts(m, "\n\tShare Capabilities:");
 669         if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
 670                 seq_puts(m, " DFS,");
 671         if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
 672                 seq_puts(m, " CONTINUOUS AVAILABILITY,");
 673         if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
 674                 seq_puts(m, " SCALEOUT,");
 675         if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
 676                 seq_puts(m, " CLUSTER,");
 677         if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
 678                 seq_puts(m, " ASYMMETRIC,");
 679         if (tcon->capabilities == 0)
 680                 seq_puts(m, " None");
 681         if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
 682                 seq_puts(m, " Aligned,");
 683         if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
 684                 seq_puts(m, " Partition Aligned,");
 685         if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
 686                 seq_puts(m, " SSD,");
 687         if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
 688                 seq_puts(m, " TRIM-support,");
 689
 690         seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
 691         if (tcon->perf_sector_size)
 692                 seq_printf(m, "\tOptimal sector size: 0x%x",
 693                            tcon->perf_sector_size);
 694 }
 695
 696 static void
 697 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
 698 {
 699 #ifdef CONFIG_CIFS_STATS
 700         atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
 701         atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
 702         seq_printf(m, "\nNegotiates: %d sent %d failed",
 703                    atomic_read(&sent[SMB2_NEGOTIATE_HE]),
 704                    atomic_read(&failed[SMB2_NEGOTIATE_HE]));
 705         seq_printf(m, "\nSessionSetups: %d sent %d failed",
 706                    atomic_read(&sent[SMB2_SESSION_SETUP_HE]),
 707                    atomic_read(&failed[SMB2_SESSION_SETUP_HE]));
 708         seq_printf(m, "\nLogoffs: %d sent %d failed",
 709                    atomic_read(&sent[SMB2_LOGOFF_HE]),
 710                    atomic_read(&failed[SMB2_LOGOFF_HE]));
 711         seq_printf(m, "\nTreeConnects: %d sent %d failed",
 712                    atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
 713                    atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
 714         seq_printf(m, "\nTreeDisconnects: %d sent %d failed",
 715                    atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
 716                    atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
 717         seq_printf(m, "\nCreates: %d sent %d failed",
 718                    atomic_read(&sent[SMB2_CREATE_HE]),
 719                    atomic_read(&failed[SMB2_CREATE_HE]));
 720         seq_printf(m, "\nCloses: %d sent %d failed",
 721                    atomic_read(&sent[SMB2_CLOSE_HE]),
 722                    atomic_read(&failed[SMB2_CLOSE_HE]));
 723         seq_printf(m, "\nFlushes: %d sent %d failed",
 724                    atomic_read(&sent[SMB2_FLUSH_HE]),
 725                    atomic_read(&failed[SMB2_FLUSH_HE]));
 726         seq_printf(m, "\nReads: %d sent %d failed",
 727                    atomic_read(&sent[SMB2_READ_HE]),
 728                    atomic_read(&failed[SMB2_READ_HE]));
 729         seq_printf(m, "\nWrites: %d sent %d failed",
 730                    atomic_read(&sent[SMB2_WRITE_HE]),
 731                    atomic_read(&failed[SMB2_WRITE_HE]));
 732         seq_printf(m, "\nLocks: %d sent %d failed",
 733                    atomic_read(&sent[SMB2_LOCK_HE]),
 734                    atomic_read(&failed[SMB2_LOCK_HE]));
 735         seq_printf(m, "\nIOCTLs: %d sent %d failed",
 736                    atomic_read(&sent[SMB2_IOCTL_HE]),
 737                    atomic_read(&failed[SMB2_IOCTL_HE]));
 738         seq_printf(m, "\nCancels: %d sent %d failed",
 739                    atomic_read(&sent[SMB2_CANCEL_HE]),
 740                    atomic_read(&failed[SMB2_CANCEL_HE]));
 741         seq_printf(m, "\nEchos: %d sent %d failed",
 742                    atomic_read(&sent[SMB2_ECHO_HE]),
 743                    atomic_read(&failed[SMB2_ECHO_HE]));
 744         seq_printf(m, "\nQueryDirectories: %d sent %d failed",
 745                    atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
 746                    atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
 747         seq_printf(m, "\nChangeNotifies: %d sent %d failed",
 748                    atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
 749                    atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
 750         seq_printf(m, "\nQueryInfos: %d sent %d failed",
 751                    atomic_read(&sent[SMB2_QUERY_INFO_HE]),
 752                    atomic_read(&failed[SMB2_QUERY_INFO_HE]));
 753         seq_printf(m, "\nSetInfos: %d sent %d failed",
 754                    atomic_read(&sent[SMB2_SET_INFO_HE]),
 755                    atomic_read(&failed[SMB2_SET_INFO_HE]));
 756         seq_printf(m, "\nOplockBreaks: %d sent %d failed",
 757                    atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
 758                    atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
 759 #endif
 760 }
 761
 762 static void
 763 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
 764 {
 765         struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
 766         struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
 767
 768         cfile->fid.persistent_fid = fid->persistent_fid;
 769         cfile->fid.volatile_fid = fid->volatile_fid;
 770         server->ops->set_oplock_level(cinode, oplock, fid->epoch,
 771                                       &fid->purge_cache);
 772         cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
 773         memcpy(cfile->fid.create_guid, fid->create_guid, 16);
 774 }
 775
 776 static void
 777 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
 778                 struct cifs_fid *fid)
 779 {
 780         SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 781 }
 782
 783 static int
 784 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
 785                      u64 persistent_fid, u64 volatile_fid,
 786                      struct copychunk_ioctl *pcchunk)
 787 {
 788         int rc;
 789         unsigned int ret_data_len;
 790         struct resume_key_req *res_key;
 791
 792         rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
 793                         FSCTL_SRV_REQUEST_RESUME_KEY, true /* is_fsctl */,
 794                         NULL, 0 /* no input */,
 795                         (char **)&res_key, &ret_data_len);
 796
 797         if (rc) {
 798                 cifs_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
 799                 goto req_res_key_exit;
 800         }
 801         if (ret_data_len < sizeof(struct resume_key_req)) {
 802                 cifs_dbg(VFS, "Invalid refcopy resume key length\n");
 803                 rc = -EINVAL;
 804                 goto req_res_key_exit;
 805         }
 806         memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
 807
 808 req_res_key_exit:
 809         kfree(res_key);
 810         return rc;
 811 }
 812
 813 static ssize_t
 814 smb2_copychunk_range(const unsigned int xid,
 815                         struct cifsFileInfo *srcfile,
 816                         struct cifsFileInfo *trgtfile, u64 src_off,
 817                         u64 len, u64 dest_off)
 818 {
 819         int rc;
 820         unsigned int ret_data_len;
 821         struct copychunk_ioctl *pcchunk;
 822         struct copychunk_ioctl_rsp *retbuf = NULL;
 823         struct cifs_tcon *tcon;
 824         int chunks_copied = 0;
 825         bool chunk_sizes_updated = false;
 826         ssize_t bytes_written, total_bytes_written = 0;
 827
 828         pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
 829
 830         if (pcchunk == NULL)
 831                 return -ENOMEM;
 832
 833         cifs_dbg(FYI, "in smb2_copychunk_range - about to call request res key\n");
 834         /* Request a key from the server to identify the source of the copy */
 835         rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
 836                                 srcfile->fid.persistent_fid,
 837                                 srcfile->fid.volatile_fid, pcchunk);
 838
 839         /* Note: request_res_key sets res_key null only if rc !=0 */
 840         if (rc)
 841                 goto cchunk_out;
 842
 843         /* For now array only one chunk long, will make more flexible later */
 844         pcchunk->ChunkCount = cpu_to_le32(1);
 845         pcchunk->Reserved = 0;
 846         pcchunk->Reserved2 = 0;
 847
 848         tcon = tlink_tcon(trgtfile->tlink);
 849
 850         while (len > 0) {
 851                 pcchunk->SourceOffset = cpu_to_le64(src_off);
 852                 pcchunk->TargetOffset = cpu_to_le64(dest_off);
 853                 pcchunk->Length =
 854                         cpu_to_le32(min_t(u32, len, tcon->max_bytes_chunk));
 855
 856                 /* Request server copy to target from src identified by key */
 857                 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
 858                         trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
 859                         true /* is_fsctl */, (char *)pcchunk,
 860                         sizeof(struct copychunk_ioctl), (char **)&retbuf,
 861                         &ret_data_len);
 862                 if (rc == 0) {
 863                         if (ret_data_len !=
 864                                         sizeof(struct copychunk_ioctl_rsp)) {
 865                                 cifs_dbg(VFS, "invalid cchunk response size\n");
 866                                 rc = -EIO;
 867                                 goto cchunk_out;
 868                         }
 869                         if (retbuf->TotalBytesWritten == 0) {
 870                                 cifs_dbg(FYI, "no bytes copied\n");
 871                                 rc = -EIO;
 872                                 goto cchunk_out;
 873                         }
 874                         /*
 875                          * Check if server claimed to write more than we asked
 876                          */
 877                         if (le32_to_cpu(retbuf->TotalBytesWritten) >
 878                             le32_to_cpu(pcchunk->Length)) {
 879                                 cifs_dbg(VFS, "invalid copy chunk response\n");
 880                                 rc = -EIO;
 881                                 goto cchunk_out;
 882                         }
 883                         if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
 884                                 cifs_dbg(VFS, "invalid num chunks written\n");
 885                                 rc = -EIO;
 886                                 goto cchunk_out;
 887                         }
 888                         chunks_copied++;
 889
 890                         bytes_written = le32_to_cpu(retbuf->TotalBytesWritten);
 891                         src_off += bytes_written;
 892                         dest_off += bytes_written;
 893                         len -= bytes_written;
 894                         total_bytes_written += bytes_written;
 895
 896                         cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n",
 897                                 le32_to_cpu(retbuf->ChunksWritten),
 898                                 le32_to_cpu(retbuf->ChunkBytesWritten),
 899                                 bytes_written);
 900                 } else if (rc == -EINVAL) {
 901                         if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
 902                                 goto cchunk_out;
 903
 904                         cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
 905                                 le32_to_cpu(retbuf->ChunksWritten),
 906                                 le32_to_cpu(retbuf->ChunkBytesWritten),
 907                                 le32_to_cpu(retbuf->TotalBytesWritten));
 908
 909                         /*
 910                          * Check if this is the first request using these sizes,
 911                          * (ie check if copy succeed once with original sizes
 912                          * and check if the server gave us different sizes after
 913                          * we already updated max sizes on previous request).
 914                          * if not then why is the server returning an error now
 915                          */
 916                         if ((chunks_copied != 0) || chunk_sizes_updated)
 917                                 goto cchunk_out;
 918
 919                         /* Check that server is not asking us to grow size */
 920                         if (le32_to_cpu(retbuf->ChunkBytesWritten) <
 921                                         tcon->max_bytes_chunk)
 922                                 tcon->max_bytes_chunk =
 923                                         le32_to_cpu(retbuf->ChunkBytesWritten);
 924                         else
 925                                 goto cchunk_out; /* server gave us bogus size */
 926
 927                         /* No need to change MaxChunks since already set to 1 */
 928                         chunk_sizes_updated = true;
 929                 } else
 930                         goto cchunk_out;
 931         }
 932
 933 cchunk_out:
 934         kfree(pcchunk);
 935         kfree(retbuf);
 936         if (rc)
 937                 return rc;
 938         else
 939                 return total_bytes_written;
 940 }
 941
 942 static int
 943 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
 944                 struct cifs_fid *fid)
 945 {
 946         return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 947 }
 948
 949 static unsigned int
 950 smb2_read_data_offset(char *buf)
 951 {
 952         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
 953         return rsp->DataOffset;
 954 }
 955
 956 static unsigned int
 957 smb2_read_data_length(char *buf, bool in_remaining)
 958 {
 959         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
 960
 961         if (in_remaining)
 962                 return le32_to_cpu(rsp->DataRemaining);
 963
 964         return le32_to_cpu(rsp->DataLength);
 965 }
 966
 967
 968 static int
 969 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
 970                struct cifs_io_parms *parms, unsigned int *bytes_read,
 971                char **buf, int *buf_type)
 972 {
 973         parms->persistent_fid = pfid->persistent_fid;
 974         parms->volatile_fid = pfid->volatile_fid;
 975         return SMB2_read(xid, parms, bytes_read, buf, buf_type);
 976 }
 977
 978 static int
 979 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
 980                 struct cifs_io_parms *parms, unsigned int *written,
 981                 struct kvec *iov, unsigned long nr_segs)
 982 {
 983
 984         parms->persistent_fid = pfid->persistent_fid;
 985         parms->volatile_fid = pfid->volatile_fid;
 986         return SMB2_write(xid, parms, written, iov, nr_segs);
 987 }
 988
 989 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
 990 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
 991                 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
 992 {
 993         struct cifsInodeInfo *cifsi;
 994         int rc;
 995
 996         cifsi = CIFS_I(inode);
 997
 998         /* if file already sparse don't bother setting sparse again */
 999         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
1000                 return true; /* already sparse */
1001
1002         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
1003                 return true; /* already not sparse */
1004
1005         /*
1006          * Can't check for sparse support on share the usual way via the
1007          * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
1008          * since Samba server doesn't set the flag on the share, yet
1009          * supports the set sparse FSCTL and returns sparse correctly
1010          * in the file attributes. If we fail setting sparse though we
1011          * mark that server does not support sparse files for this share
1012          * to avoid repeatedly sending the unsupported fsctl to server
1013          * if the file is repeatedly extended.
1014          */
1015         if (tcon->broken_sparse_sup)
1016                 return false;
1017
1018         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1019                         cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
1020                         true /* is_fctl */,
1021                         &setsparse, 1, NULL, NULL);
1022         if (rc) {
1023                 tcon->broken_sparse_sup = true;
1024                 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
1025                 return false;
1026         }
1027
1028         if (setsparse)
1029                 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
1030         else
1031                 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
1032
1033         return true;
1034 }
1035
1036 static int
1037 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
1038                    struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
1039 {
1040         __le64 eof = cpu_to_le64(size);
1041         struct inode *inode;
1042
1043         /*
1044          * If extending file more than one page make sparse. Many Linux fs
1045          * make files sparse by default when extending via ftruncate
1046          */
1047         inode = d_inode(cfile->dentry);
1048
1049         if (!set_alloc && (size > inode->i_size + 8192)) {
1050                 __u8 set_sparse = 1;
1051
1052                 /* whether set sparse succeeds or not, extend the file */
1053                 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
1054         }
1055
1056         return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
1057                             cfile->fid.volatile_fid, cfile->pid, &eof, false);
1058 }
1059
1060 static int
1061 smb2_duplicate_extents(const unsigned int xid,
1062                         struct cifsFileInfo *srcfile,
1063                         struct cifsFileInfo *trgtfile, u64 src_off,
1064                         u64 len, u64 dest_off)
1065 {
1066         int rc;
1067         unsigned int ret_data_len;
1068         struct duplicate_extents_to_file dup_ext_buf;
1069         struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
1070
1071         /* server fileays advertise duplicate extent support with this flag */
1072         if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
1073              FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
1074                 return -EOPNOTSUPP;
1075
1076         dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
1077         dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
1078         dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
1079         dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
1080         dup_ext_buf.ByteCount = cpu_to_le64(len);
1081         cifs_dbg(FYI, "duplicate extents: src off %lld dst off %lld len %lld",
1082                 src_off, dest_off, len);
1083
1084         rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
1085         if (rc)
1086                 goto duplicate_extents_out;
1087
1088         rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1089                         trgtfile->fid.volatile_fid,
1090                         FSCTL_DUPLICATE_EXTENTS_TO_FILE,
1091                         true /* is_fsctl */,
1092                         (char *)&dup_ext_buf,
1093                         sizeof(struct duplicate_extents_to_file),
1094                         NULL,
1095                         &ret_data_len);
1096
1097         if (ret_data_len > 0)
1098                 cifs_dbg(FYI, "non-zero response length in duplicate extents");
1099
1100 duplicate_extents_out:
1101         return rc;
1102 }
1103
1104 static int
1105 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
1106                    struct cifsFileInfo *cfile)
1107 {
1108         return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
1109                             cfile->fid.volatile_fid);
1110 }
1111
1112 static int
1113 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
1114                    struct cifsFileInfo *cfile)
1115 {
1116         struct fsctl_set_integrity_information_req integr_info;
1117         unsigned int ret_data_len;
1118
1119         integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
1120         integr_info.Flags = 0;
1121         integr_info.Reserved = 0;
1122
1123         return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1124                         cfile->fid.volatile_fid,
1125                         FSCTL_SET_INTEGRITY_INFORMATION,
1126                         true /* is_fsctl */,
1127                         (char *)&integr_info,
1128                         sizeof(struct fsctl_set_integrity_information_req),
1129                         NULL,
1130                         &ret_data_len);
1131
1132 }
1133
1134 static int
1135 smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
1136                    struct cifsFileInfo *cfile, void __user *ioc_buf)
1137 {
1138         char *retbuf = NULL;
1139         unsigned int ret_data_len = 0;
1140         int rc;
1141         struct smb_snapshot_array snapshot_in;
1142
1143         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1144                         cfile->fid.volatile_fid,
1145                         FSCTL_SRV_ENUMERATE_SNAPSHOTS,
1146                         true /* is_fsctl */,
1147                         NULL, 0 /* no input data */,
1148                         (char **)&retbuf,
1149                         &ret_data_len);
1150         cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n",
1151                         rc, ret_data_len);
1152         if (rc)
1153                 return rc;
1154
1155         if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) {
1156                 /* Fixup buffer */
1157                 if (copy_from_user(&snapshot_in, ioc_buf,
1158                     sizeof(struct smb_snapshot_array))) {
1159                         rc = -EFAULT;
1160                         kfree(retbuf);
1161                         return rc;
1162                 }
1163                 if (snapshot_in.snapshot_array_size < sizeof(struct smb_snapshot_array)) {
1164                         rc = -ERANGE;
1165                         kfree(retbuf);
1166                         return rc;
1167                 }
1168
1169                 if (ret_data_len > snapshot_in.snapshot_array_size)
1170                         ret_data_len = snapshot_in.snapshot_array_size;
1171
1172                 if (copy_to_user(ioc_buf, retbuf, ret_data_len))
1173                         rc = -EFAULT;
1174         }
1175
1176         kfree(retbuf);
1177         return rc;
1178 }
1179
1180 static int
1181 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
1182                      const char *path, struct cifs_sb_info *cifs_sb,
1183                      struct cifs_fid *fid, __u16 search_flags,
1184                      struct cifs_search_info *srch_inf)
1185 {
1186         __le16 *utf16_path;
1187         int rc;
1188         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1189         struct cifs_open_parms oparms;
1190
1191         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1192         if (!utf16_path)
1193                 return -ENOMEM;
1194
1195         oparms.tcon = tcon;
1196         oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
1197         oparms.disposition = FILE_OPEN;
1198         oparms.create_options = 0;
1199         oparms.fid = fid;
1200         oparms.reconnect = false;
1201
1202         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
1203         kfree(utf16_path);
1204         if (rc) {
1205                 cifs_dbg(FYI, "open dir failed rc=%d\n", rc);
1206                 return rc;
1207         }
1208
1209         srch_inf->entries_in_buffer = 0;
1210         srch_inf->index_of_last_entry = 0;
1211
1212         rc = SMB2_query_directory(xid, tcon, fid->persistent_fid,
1213                                   fid->volatile_fid, 0, srch_inf);
1214         if (rc) {
1215                 cifs_dbg(FYI, "query directory failed rc=%d\n", rc);
1216                 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1217         }
1218         return rc;
1219 }
1220
1221 static int
1222 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
1223                     struct cifs_fid *fid, __u16 search_flags,
1224                     struct cifs_search_info *srch_inf)
1225 {
1226         return SMB2_query_directory(xid, tcon, fid->persistent_fid,
1227                                     fid->volatile_fid, 0, srch_inf);
1228 }
1229
1230 static int
1231 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
1232                struct cifs_fid *fid)
1233 {
1234         return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1235 }
1236
1237 /*
1238 * If we negotiate SMB2 protocol and get STATUS_PENDING - update
1239 * the number of credits and return true. Otherwise - return false.
1240 */
1241 static bool
1242 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server, int length)
1243 {
1244         struct smb2_sync_hdr *shdr = get_sync_hdr(buf);
1245
1246         if (shdr->Status != STATUS_PENDING)
1247                 return false;
1248
1249         if (!length) {
1250                 spin_lock(&server->req_lock);
1251                 server->credits += le16_to_cpu(shdr->CreditRequest);
1252                 spin_unlock(&server->req_lock);
1253                 wake_up(&server->request_q);
1254         }
1255
1256         return true;
1257 }
1258
1259 static bool
1260 smb2_is_session_expired(char *buf)
1261 {
1262         struct smb2_sync_hdr *shdr = get_sync_hdr(buf);
1263
1264         if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED)
1265                 return false;
1266
1267         cifs_dbg(FYI, "Session expired\n");
1268         return true;
1269 }
1270
1271 static int
1272 smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
1273                      struct cifsInodeInfo *cinode)
1274 {
1275         if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
1276                 return SMB2_lease_break(0, tcon, cinode->lease_key,
1277                                         smb2_get_lease_state(cinode));
1278
1279         return SMB2_oplock_break(0, tcon, fid->persistent_fid,
1280                                  fid->volatile_fid,
1281                                  CIFS_CACHE_READ(cinode) ? 1 : 0);
1282 }
1283
1284 static int
1285 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
1286              struct kstatfs *buf)
1287 {
1288         int rc;
1289         __le16 srch_path = 0; /* Null - open root of share */
1290         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1291         struct cifs_open_parms oparms;
1292         struct cifs_fid fid;
1293
1294         oparms.tcon = tcon;
1295         oparms.desired_access = FILE_READ_ATTRIBUTES;
1296         oparms.disposition = FILE_OPEN;
1297         oparms.create_options = 0;
1298         oparms.fid = &fid;
1299         oparms.reconnect = false;
1300
1301         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
1302         if (rc)
1303                 return rc;
1304         buf->f_type = SMB2_MAGIC_NUMBER;
1305         rc = SMB2_QFS_info(xid, tcon, fid.persistent_fid, fid.volatile_fid,
1306                            buf);
1307         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
1308         return rc;
1309 }
1310
1311 static bool
1312 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
1313 {
1314         return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
1315                ob1->fid.volatile_fid == ob2->fid.volatile_fid;
1316 }
1317
1318 static int
1319 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
1320                __u64 length, __u32 type, int lock, int unlock, bool wait)
1321 {
1322         if (unlock && !lock)
1323                 type = SMB2_LOCKFLAG_UNLOCK;
1324         return SMB2_lock(xid, tlink_tcon(cfile->tlink),
1325                          cfile->fid.persistent_fid, cfile->fid.volatile_fid,
1326                          current->tgid, length, offset, type, wait);
1327 }
1328
1329 static void
1330 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
1331 {
1332         memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
1333 }
1334
1335 static void
1336 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
1337 {
1338         memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
1339 }
1340
1341 static void
1342 smb2_new_lease_key(struct cifs_fid *fid)
1343 {
1344         generate_random_uuid(fid->lease_key);
1345 }
1346
1347 static int
1348 smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
1349                    const char *search_name,
1350                    struct dfs_info3_param **target_nodes,
1351                    unsigned int *num_of_nodes,
1352                    const struct nls_table *nls_codepage, int remap)
1353 {
1354         int rc;
1355         __le16 *utf16_path = NULL;
1356         int utf16_path_len = 0;
1357         struct cifs_tcon *tcon;
1358         struct fsctl_get_dfs_referral_req *dfs_req = NULL;
1359         struct get_dfs_referral_rsp *dfs_rsp = NULL;
1360         u32 dfs_req_size = 0, dfs_rsp_size = 0;
1361
1362         cifs_dbg(FYI, "smb2_get_dfs_refer path <%s>\n", search_name);
1363
1364         /*
1365          * Try to use the IPC tcon, otherwise just use any
1366          */
1367         tcon = ses->tcon_ipc;
1368         if (tcon == NULL) {
1369                 spin_lock(&cifs_tcp_ses_lock);
1370                 tcon = list_first_entry_or_null(&ses->tcon_list,
1371                                                 struct cifs_tcon,
1372                                                 tcon_list);
1373                 if (tcon)
1374                         tcon->tc_count++;
1375                 spin_unlock(&cifs_tcp_ses_lock);
1376         }
1377
1378         if (tcon == NULL) {
1379                 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n",
1380                          ses);
1381                 rc = -ENOTCONN;
1382                 goto out;
1383         }
1384
1385         utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX,
1386                                            &utf16_path_len,
1387                                            nls_codepage, remap);
1388         if (!utf16_path) {
1389                 rc = -ENOMEM;
1390                 goto out;
1391         }
1392
1393         dfs_req_size = sizeof(*dfs_req) + utf16_path_len;
1394         dfs_req = kzalloc(dfs_req_size, GFP_KERNEL);
1395         if (!dfs_req) {
1396                 rc = -ENOMEM;
1397                 goto out;
1398         }
1399
1400         /* Highest DFS referral version understood */
1401         dfs_req->MaxReferralLevel = DFS_VERSION;
1402
1403         /* Path to resolve in an UTF-16 null-terminated string */
1404         memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len);
1405
1406         do {
1407                 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
1408                                 FSCTL_DFS_GET_REFERRALS,
1409                                 true /* is_fsctl */,
1410                                 (char *)dfs_req, dfs_req_size,
1411                                 (char **)&dfs_rsp, &dfs_rsp_size);
1412         } while (rc == -EAGAIN);
1413
1414         if (rc) {
1415                 if (rc != -ENOENT)
1416                         cifs_dbg(VFS, "ioctl error in smb2_get_dfs_refer rc=%d\n", rc);
1417                 goto out;
1418         }
1419
1420         rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size,
1421                                  num_of_nodes, target_nodes,
1422                                  nls_codepage, remap, search_name,
1423                                  true /* is_unicode */);
1424         if (rc) {
1425                 cifs_dbg(VFS, "parse error in smb2_get_dfs_refer rc=%d\n", rc);
1426                 goto out;
1427         }
1428
1429  out:
1430         if (tcon && !tcon->ipc) {
1431                 /* ipc tcons are not refcounted */
1432                 spin_lock(&cifs_tcp_ses_lock);
1433                 tcon->tc_count--;
1434                 spin_unlock(&cifs_tcp_ses_lock);
1435         }
1436         kfree(utf16_path);
1437         kfree(dfs_req);
1438         kfree(dfs_rsp);
1439         return rc;
1440 }
1441 #define SMB2_SYMLINK_STRUCT_SIZE \
1442         (sizeof(struct smb2_err_rsp) - 1 + sizeof(struct smb2_symlink_err_rsp))
1443
1444 static int
1445 smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
1446                    const char *full_path, char **target_path,
1447                    struct cifs_sb_info *cifs_sb)
1448 {
1449         int rc;
1450         __le16 *utf16_path;
1451         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1452         struct cifs_open_parms oparms;
1453         struct cifs_fid fid;
1454         struct smb2_err_rsp *err_buf = NULL;
1455         struct smb2_symlink_err_rsp *symlink;
1456         unsigned int sub_len;
1457         unsigned int sub_offset;
1458         unsigned int print_len;
1459         unsigned int print_offset;
1460
1461         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
1462
1463         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
1464         if (!utf16_path)
1465                 return -ENOMEM;
1466
1467         oparms.tcon = tcon;
1468         oparms.desired_access = FILE_READ_ATTRIBUTES;
1469         oparms.disposition = FILE_OPEN;
1470         oparms.create_options = 0;
1471         oparms.fid = &fid;
1472         oparms.reconnect = false;
1473
1474         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, &err_buf);
1475
1476         if (!rc || !err_buf) {
1477                 kfree(utf16_path);
1478                 return -ENOENT;
1479         }
1480
1481         if (le32_to_cpu(err_buf->ByteCount) < sizeof(struct smb2_symlink_err_rsp) ||
1482             get_rfc1002_length(err_buf) + 4 < SMB2_SYMLINK_STRUCT_SIZE) {
1483                 kfree(utf16_path);
1484                 return -ENOENT;
1485         }
1486
1487         /* open must fail on symlink - reset rc */
1488         rc = 0;
1489         symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData;
1490         sub_len = le16_to_cpu(symlink->SubstituteNameLength);
1491         sub_offset = le16_to_cpu(symlink->SubstituteNameOffset);
1492         print_len = le16_to_cpu(symlink->PrintNameLength);
1493         print_offset = le16_to_cpu(symlink->PrintNameOffset);
1494
1495         if (get_rfc1002_length(err_buf) + 4 <
1496                         SMB2_SYMLINK_STRUCT_SIZE + sub_offset + sub_len) {
1497                 kfree(utf16_path);
1498                 return -ENOENT;
1499         }
1500
1501         if (get_rfc1002_length(err_buf) + 4 <
1502                         SMB2_SYMLINK_STRUCT_SIZE + print_offset + print_len) {
1503                 kfree(utf16_path);
1504                 return -ENOENT;
1505         }
1506
1507         *target_path = cifs_strndup_from_utf16(
1508                                 (char *)symlink->PathBuffer + sub_offset,
1509                                 sub_len, true, cifs_sb->local_nls);
1510         if (!(*target_path)) {
1511                 kfree(utf16_path);
1512                 return -ENOMEM;
1513         }
1514         convert_delimiter(*target_path, '/');
1515         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
1516         kfree(utf16_path);
1517         return rc;
1518 }
1519
1520 #ifdef CONFIG_CIFS_ACL
1521 static struct cifs_ntsd *
1522 get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb,
1523                 const struct cifs_fid *cifsfid, u32 *pacllen)
1524 {
1525         struct cifs_ntsd *pntsd = NULL;
1526         unsigned int xid;
1527         int rc = -EOPNOTSUPP;
1528         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
1529
1530         if (IS_ERR(tlink))
1531                 return ERR_CAST(tlink);
1532
1533         xid = get_xid();
1534         cifs_dbg(FYI, "trying to get acl\n");
1535
1536         rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid,
1537                             cifsfid->volatile_fid, (void **)&pntsd, pacllen);
1538         free_xid(xid);
1539
1540         cifs_put_tlink(tlink);
1541
1542         cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
1543         if (rc)
1544                 return ERR_PTR(rc);
1545         return pntsd;
1546
1547 }
1548
1549 static struct cifs_ntsd *
1550 get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb,
1551                 const char *path, u32 *pacllen)
1552 {
1553         struct cifs_ntsd *pntsd = NULL;
1554         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1555         unsigned int xid;
1556         int rc;
1557         struct cifs_tcon *tcon;
1558         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
1559         struct cifs_fid fid;
1560         struct cifs_open_parms oparms;
1561         __le16 *utf16_path;
1562
1563         cifs_dbg(FYI, "get smb3 acl for path %s\n", path);
1564         if (IS_ERR(tlink))
1565                 return ERR_CAST(tlink);
1566
1567         tcon = tlink_tcon(tlink);
1568         xid = get_xid();
1569
1570         if (backup_cred(cifs_sb))
1571                 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
1572         else
1573                 oparms.create_options = 0;
1574
1575         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1576         if (!utf16_path)
1577                 return ERR_PTR(-ENOMEM);
1578
1579         oparms.tcon = tcon;
1580         oparms.desired_access = READ_CONTROL;
1581         oparms.disposition = FILE_OPEN;
1582         oparms.fid = &fid;
1583         oparms.reconnect = false;
1584
1585         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
1586         kfree(utf16_path);
1587         if (!rc) {
1588                 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
1589                             fid.volatile_fid, (void **)&pntsd, pacllen);
1590                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
1591         }
1592
1593         cifs_put_tlink(tlink);
1594         free_xid(xid);
1595
1596         cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
1597         if (rc)
1598                 return ERR_PTR(rc);
1599         return pntsd;
1600 }
1601
1602 #ifdef CONFIG_CIFS_ACL
1603 static int
1604 set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
1605                 struct inode *inode, const char *path, int aclflag)
1606 {
1607         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1608         unsigned int xid;
1609         int rc, access_flags = 0;
1610         struct cifs_tcon *tcon;
1611         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1612         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
1613         struct cifs_fid fid;
1614         struct cifs_open_parms oparms;
1615         __le16 *utf16_path;
1616
1617         cifs_dbg(FYI, "set smb3 acl for path %s\n", path);
1618         if (IS_ERR(tlink))
1619                 return PTR_ERR(tlink);
1620
1621         tcon = tlink_tcon(tlink);
1622         xid = get_xid();
1623
1624         if (backup_cred(cifs_sb))
1625                 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
1626         else
1627                 oparms.create_options = 0;
1628
1629         if (aclflag == CIFS_ACL_OWNER || aclflag == CIFS_ACL_GROUP)
1630                 access_flags = WRITE_OWNER;
1631         else
1632                 access_flags = WRITE_DAC;
1633
1634         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1635         if (!utf16_path)
1636                 return -ENOMEM;
1637
1638         oparms.tcon = tcon;
1639         oparms.desired_access = access_flags;
1640         oparms.disposition = FILE_OPEN;
1641         oparms.path = path;
1642         oparms.fid = &fid;
1643         oparms.reconnect = false;
1644
1645         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
1646         kfree(utf16_path);
1647         if (!rc) {
1648                 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
1649                             fid.volatile_fid, pnntsd, acllen, aclflag);
1650                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
1651         }
1652
1653         cifs_put_tlink(tlink);
1654         free_xid(xid);
1655         return rc;
1656 }
1657 #endif /* CIFS_ACL */
1658
1659 /* Retrieve an ACL from the server */
1660 static struct cifs_ntsd *
1661 get_smb2_acl(struct cifs_sb_info *cifs_sb,
1662                                       struct inode *inode, const char *path,
1663                                       u32 *pacllen)
1664 {
1665         struct cifs_ntsd *pntsd = NULL;
1666         struct cifsFileInfo *open_file = NULL;
1667
1668         if (inode)
1669                 open_file = find_readable_file(CIFS_I(inode), true);
1670         if (!open_file)
1671                 return get_smb2_acl_by_path(cifs_sb, path, pacllen);
1672
1673         pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen);
1674         cifsFileInfo_put(open_file);
1675         return pntsd;
1676 }
1677 #endif
1678
1679 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
1680                             loff_t offset, loff_t len, bool keep_size)
1681 {
1682         struct inode *inode;
1683         struct cifsInodeInfo *cifsi;
1684         struct cifsFileInfo *cfile = file->private_data;
1685         struct file_zero_data_information fsctl_buf;
1686         long rc;
1687         unsigned int xid;
1688
1689         xid = get_xid();
1690
1691         inode = d_inode(cfile->dentry);
1692         cifsi = CIFS_I(inode);
1693
1694         /* if file not oplocked can't be sure whether asking to extend size */
1695         if (!CIFS_CACHE_READ(cifsi))
1696                 if (keep_size == false)
1697                         return -EOPNOTSUPP;
1698
1699         /*
1700          * Must check if file sparse since fallocate -z (zero range) assumes
1701          * non-sparse allocation
1702          */
1703         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE))
1704                 return -EOPNOTSUPP;
1705
1706         /*
1707          * need to make sure we are not asked to extend the file since the SMB3
1708          * fsctl does not change the file size. In the future we could change
1709          * this to zero the first part of the range then set the file size
1710          * which for a non sparse file would zero the newly extended range
1711          */
1712         if (keep_size == false)
1713                 if (i_size_read(inode) < offset + len)
1714                         return -EOPNOTSUPP;
1715
1716         cifs_dbg(FYI, "offset %lld len %lld", offset, len);
1717
1718         fsctl_buf.FileOffset = cpu_to_le64(offset);
1719         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
1720
1721         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1722                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
1723                         true /* is_fctl */, (char *)&fsctl_buf,
1724                         sizeof(struct file_zero_data_information), NULL, NULL);
1725         free_xid(xid);
1726         return rc;
1727 }
1728
1729 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
1730                             loff_t offset, loff_t len)
1731 {
1732         struct inode *inode;
1733         struct cifsInodeInfo *cifsi;
1734         struct cifsFileInfo *cfile = file->private_data;
1735         struct file_zero_data_information fsctl_buf;
1736         long rc;
1737         unsigned int xid;
1738         __u8 set_sparse = 1;
1739
1740         xid = get_xid();
1741
1742         inode = d_inode(cfile->dentry);
1743         cifsi = CIFS_I(inode);
1744
1745         /* Need to make file sparse, if not already, before freeing range. */
1746         /* Consider adding equivalent for compressed since it could also work */
1747         if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse))
1748                 return -EOPNOTSUPP;
1749
1750         cifs_dbg(FYI, "offset %lld len %lld", offset, len);
1751
1752         fsctl_buf.FileOffset = cpu_to_le64(offset);
1753         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
1754
1755         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1756                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
1757                         true /* is_fctl */, (char *)&fsctl_buf,
1758                         sizeof(struct file_zero_data_information), NULL, NULL);
1759         free_xid(xid);
1760         return rc;
1761 }
1762
1763 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
1764                             loff_t off, loff_t len, bool keep_size)
1765 {
1766         struct inode *inode;
1767         struct cifsInodeInfo *cifsi;
1768         struct cifsFileInfo *cfile = file->private_data;
1769         long rc = -EOPNOTSUPP;
1770         unsigned int xid;
1771
1772         xid = get_xid();
1773
1774         inode = d_inode(cfile->dentry);
1775         cifsi = CIFS_I(inode);
1776
1777         /* if file not oplocked can't be sure whether asking to extend size */
1778         if (!CIFS_CACHE_READ(cifsi))
1779                 if (keep_size == false)
1780                         return -EOPNOTSUPP;
1781
1782         /*
1783          * Files are non-sparse by default so falloc may be a no-op
1784          * Must check if file sparse. If not sparse, and not extending
1785          * then no need to do anything since file already allocated
1786          */
1787         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
1788                 if (keep_size == true)
1789                         return 0;
1790                 /* check if extending file */
1791                 else if (i_size_read(inode) >= off + len)
1792                         /* not extending file and already not sparse */
1793                         return 0;
1794                 /* BB: in future add else clause to extend file */
1795                 else
1796                         return -EOPNOTSUPP;
1797         }
1798
1799         if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
1800                 /*
1801                  * Check if falloc starts within first few pages of file
1802                  * and ends within a few pages of the end of file to
1803                  * ensure that most of file is being forced to be
1804                  * fallocated now. If so then setting whole file sparse
1805                  * ie potentially making a few extra pages at the beginning
1806                  * or end of the file non-sparse via set_sparse is harmless.
1807                  */
1808                 if ((off > 8192) || (off + len + 8192 < i_size_read(inode)))
1809                         return -EOPNOTSUPP;
1810
1811                 rc = smb2_set_sparse(xid, tcon, cfile, inode, false);
1812         }
1813         /* BB: else ... in future add code to extend file and set sparse */
1814
1815
1816         free_xid(xid);
1817         return rc;
1818 }
1819
1820
1821 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
1822                            loff_t off, loff_t len)
1823 {
1824         /* KEEP_SIZE already checked for by do_fallocate */
1825         if (mode & FALLOC_FL_PUNCH_HOLE)
1826                 return smb3_punch_hole(file, tcon, off, len);
1827         else if (mode & FALLOC_FL_ZERO_RANGE) {
1828                 if (mode & FALLOC_FL_KEEP_SIZE)
1829                         return smb3_zero_range(file, tcon, off, len, true);
1830                 return smb3_zero_range(file, tcon, off, len, false);
1831         } else if (mode == FALLOC_FL_KEEP_SIZE)
1832                 return smb3_simple_falloc(file, tcon, off, len, true);
1833         else if (mode == 0)
1834                 return smb3_simple_falloc(file, tcon, off, len, false);
1835
1836         return -EOPNOTSUPP;
1837 }
1838
1839 static void
1840 smb2_downgrade_oplock(struct TCP_Server_Info *server,
1841                         struct cifsInodeInfo *cinode, bool set_level2)
1842 {
1843         if (set_level2)
1844                 server->ops->set_oplock_level(cinode, SMB2_OPLOCK_LEVEL_II,
1845                                                 0, NULL);
1846         else
1847                 server->ops->set_oplock_level(cinode, 0, 0, NULL);
1848 }
1849
1850 static void
1851 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1852                       unsigned int epoch, bool *purge_cache)
1853 {
1854         oplock &= 0xFF;
1855         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
1856                 return;
1857         if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
1858                 cinode->oplock = CIFS_CACHE_RHW_FLG;
1859                 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
1860                          &cinode->vfs_inode);
1861         } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
1862                 cinode->oplock = CIFS_CACHE_RW_FLG;
1863                 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
1864                          &cinode->vfs_inode);
1865         } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
1866                 cinode->oplock = CIFS_CACHE_READ_FLG;
1867                 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
1868                          &cinode->vfs_inode);
1869         } else
1870                 cinode->oplock = 0;
1871 }
1872
1873 static void
1874 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1875                        unsigned int epoch, bool *purge_cache)
1876 {
1877         char message[5] = {0};
1878
1879         oplock &= 0xFF;
1880         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
1881                 return;
1882
1883         cinode->oplock = 0;
1884         if (oplock & SMB2_LEASE_READ_CACHING_HE) {
1885                 cinode->oplock |= CIFS_CACHE_READ_FLG;
1886                 strcat(message, "R");
1887         }
1888         if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
1889                 cinode->oplock |= CIFS_CACHE_HANDLE_FLG;
1890                 strcat(message, "H");
1891         }
1892         if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
1893                 cinode->oplock |= CIFS_CACHE_WRITE_FLG;
1894                 strcat(message, "W");
1895         }
1896         if (!cinode->oplock)
1897                 strcat(message, "None");
1898         cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
1899                  &cinode->vfs_inode);
1900 }
1901
1902 static void
1903 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1904                       unsigned int epoch, bool *purge_cache)
1905 {
1906         unsigned int old_oplock = cinode->oplock;
1907
1908         smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
1909
1910         if (purge_cache) {
1911                 *purge_cache = false;
1912                 if (old_oplock == CIFS_CACHE_READ_FLG) {
1913                         if (cinode->oplock == CIFS_CACHE_READ_FLG &&
1914                             (epoch - cinode->epoch > 0))
1915                                 *purge_cache = true;
1916                         else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
1917                                  (epoch - cinode->epoch > 1))
1918                                 *purge_cache = true;
1919                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
1920                                  (epoch - cinode->epoch > 1))
1921                                 *purge_cache = true;
1922                         else if (cinode->oplock == 0 &&
1923                                  (epoch - cinode->epoch > 0))
1924                                 *purge_cache = true;
1925                 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
1926                         if (cinode->oplock == CIFS_CACHE_RH_FLG &&
1927                             (epoch - cinode->epoch > 0))
1928                                 *purge_cache = true;
1929                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
1930                                  (epoch - cinode->epoch > 1))
1931                                 *purge_cache = true;
1932                 }
1933                 cinode->epoch = epoch;
1934         }
1935 }
1936
1937 static bool
1938 smb2_is_read_op(__u32 oplock)
1939 {
1940         return oplock == SMB2_OPLOCK_LEVEL_II;
1941 }
1942
1943 static bool
1944 smb21_is_read_op(__u32 oplock)
1945 {
1946         return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
1947                !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
1948 }
1949
1950 static __le32
1951 map_oplock_to_lease(u8 oplock)
1952 {
1953         if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
1954                 return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING;
1955         else if (oplock == SMB2_OPLOCK_LEVEL_II)
1956                 return SMB2_LEASE_READ_CACHING;
1957         else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
1958                 return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING |
1959                        SMB2_LEASE_WRITE_CACHING;
1960         return 0;
1961 }
1962
1963 static char *
1964 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
1965 {
1966         struct create_lease *buf;
1967
1968         buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
1969         if (!buf)
1970                 return NULL;
1971
1972         buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
1973         buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
1974         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
1975
1976         buf->ccontext.DataOffset = cpu_to_le16(offsetof
1977                                         (struct create_lease, lcontext));
1978         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
1979         buf->ccontext.NameOffset = cpu_to_le16(offsetof
1980                                 (struct create_lease, Name));
1981         buf->ccontext.NameLength = cpu_to_le16(4);
1982         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
1983         buf->Name[0] = 'R';
1984         buf->Name[1] = 'q';
1985         buf->Name[2] = 'L';
1986         buf->Name[3] = 's';
1987         return (char *)buf;
1988 }
1989
1990 static char *
1991 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
1992 {
1993         struct create_lease_v2 *buf;
1994
1995         buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
1996         if (!buf)
1997                 return NULL;
1998
1999         buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
2000         buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
2001         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
2002
2003         buf->ccontext.DataOffset = cpu_to_le16(offsetof
2004                                         (struct create_lease_v2, lcontext));
2005         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
2006         buf->ccontext.NameOffset = cpu_to_le16(offsetof
2007                                 (struct create_lease_v2, Name));
2008         buf->ccontext.NameLength = cpu_to_le16(4);
2009         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
2010         buf->Name[0] = 'R';
2011         buf->Name[1] = 'q';
2012         buf->Name[2] = 'L';
2013         buf->Name[3] = 's';
2014         return (char *)buf;
2015 }
2016
2017 static __u8
2018 smb2_parse_lease_buf(void *buf, unsigned int *epoch)
2019 {
2020         struct create_lease *lc = (struct create_lease *)buf;
2021
2022         *epoch = 0; /* not used */
2023         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
2024                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
2025         return le32_to_cpu(lc->lcontext.LeaseState);
2026 }
2027
2028 static __u8
2029 smb3_parse_lease_buf(void *buf, unsigned int *epoch)
2030 {
2031         struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
2032
2033         *epoch = le16_to_cpu(lc->lcontext.Epoch);
2034         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
2035                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
2036         return le32_to_cpu(lc->lcontext.LeaseState);
2037 }
2038
2039 static unsigned int
2040 smb2_wp_retry_size(struct inode *inode)
2041 {
2042         return min_t(unsigned int, CIFS_SB(inode->i_sb)->wsize,
2043                      SMB2_MAX_BUFFER_SIZE);
2044 }
2045
2046 static bool
2047 smb2_dir_needs_close(struct cifsFileInfo *cfile)
2048 {
2049         return !cfile->invalidHandle;
2050 }
2051
2052 static void
2053 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, struct smb_rqst *old_rq)
2054 {
2055         struct smb2_sync_hdr *shdr =
2056                         (struct smb2_sync_hdr *)old_rq->rq_iov[1].iov_base;
2057         unsigned int orig_len = get_rfc1002_length(old_rq->rq_iov[0].iov_base);
2058
2059         memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
2060         tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
2061         tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
2062         tr_hdr->Flags = cpu_to_le16(0x01);
2063         get_random_bytes(&tr_hdr->Nonce, SMB3_AES128CMM_NONCE);
2064         memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8);
2065         inc_rfc1001_len(tr_hdr, sizeof(struct smb2_transform_hdr) - 4);
2066         inc_rfc1001_len(tr_hdr, orig_len);
2067 }
2068
2069 static struct scatterlist *
2070 init_sg(struct smb_rqst *rqst, u8 *sign)
2071 {
2072         unsigned int sg_len = rqst->rq_nvec + rqst->rq_npages + 1;
2073         unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 24;
2074         struct scatterlist *sg;
2075         unsigned int i;
2076         unsigned int j;
2077
2078         sg = kmalloc_array(sg_len, sizeof(struct scatterlist), GFP_KERNEL);
2079         if (!sg)
2080                 return NULL;
2081
2082         sg_init_table(sg, sg_len);
2083         sg_set_buf(&sg[0], rqst->rq_iov[0].iov_base + 24, assoc_data_len);
2084         for (i = 1; i < rqst->rq_nvec; i++)
2085                 sg_set_buf(&sg[i], rqst->rq_iov[i].iov_base,
2086                                                 rqst->rq_iov[i].iov_len);
2087         for (j = 0; i < sg_len - 1; i++, j++) {
2088                 unsigned int len = (j < rqst->rq_npages - 1) ? rqst->rq_pagesz
2089                                                         : rqst->rq_tailsz;
2090                 sg_set_page(&sg[i], rqst->rq_pages[j], len, 0);
2091         }
2092         sg_set_buf(&sg[sg_len - 1], sign, SMB2_SIGNATURE_SIZE);
2093         return sg;
2094 }
2095
2096 static int
2097 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)
2098 {
2099         struct cifs_ses *ses;
2100         u8 *ses_enc_key;
2101
2102         spin_lock(&cifs_tcp_ses_lock);
2103         list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
2104                 if (ses->Suid != ses_id)
2105                         continue;
2106                 ses_enc_key = enc ? ses->smb3encryptionkey :
2107                                                         ses->smb3decryptionkey;
2108                 memcpy(key, ses_enc_key, SMB3_SIGN_KEY_SIZE);
2109                 spin_unlock(&cifs_tcp_ses_lock);
2110                 return 0;
2111         }
2112         spin_unlock(&cifs_tcp_ses_lock);
2113
2114         return 1;
2115 }
2116 /*
2117  * Encrypt or decrypt @rqst message. @rqst has the following format:
2118  * iov[0] - transform header (associate data),
2119  * iov[1-N] and pages - data to encrypt.
2120  * On success return encrypted data in iov[1-N] and pages, leave iov[0]
2121  * untouched.
2122  */
2123 static int
2124 crypt_message(struct TCP_Server_Info *server, struct smb_rqst *rqst, int enc)
2125 {
2126         struct smb2_transform_hdr *tr_hdr =
2127                         (struct smb2_transform_hdr *)rqst->rq_iov[0].iov_base;
2128         unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 24;
2129         int rc = 0;
2130         struct scatterlist *sg;
2131         u8 sign[SMB2_SIGNATURE_SIZE] = {};
2132         u8 key[SMB3_SIGN_KEY_SIZE];
2133         struct aead_request *req;
2134         char *iv;
2135         unsigned int iv_len;
2136         DECLARE_CRYPTO_WAIT(wait);
2137         struct crypto_aead *tfm;
2138         unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
2139
2140         rc = smb2_get_enc_key(server, tr_hdr->SessionId, enc, key);
2141         if (rc) {
2142                 cifs_dbg(VFS, "%s: Could not get %scryption key\n", __func__,
2143                          enc ? "en" : "de");
2144                 return 0;
2145         }
2146
2147         rc = smb3_crypto_aead_allocate(server);
2148         if (rc) {
2149                 cifs_dbg(VFS, "%s: crypto alloc failed\n", __func__);
2150                 return rc;
2151         }
2152
2153         tfm = enc ? server->secmech.ccmaesencrypt :
2154                                                 server->secmech.ccmaesdecrypt;
2155         rc = crypto_aead_setkey(tfm, key, SMB3_SIGN_KEY_SIZE);
2156         if (rc) {
2157                 cifs_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc);
2158                 return rc;
2159         }
2160
2161         rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE);
2162         if (rc) {
2163                 cifs_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc);
2164                 return rc;
2165         }
2166
2167         req = aead_request_alloc(tfm, GFP_KERNEL);
2168         if (!req) {
2169                 cifs_dbg(VFS, "%s: Failed to alloc aead request", __func__);
2170                 return -ENOMEM;
2171         }
2172
2173         if (!enc) {
2174                 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE);
2175                 crypt_len += SMB2_SIGNATURE_SIZE;
2176         }
2177
2178         sg = init_sg(rqst, sign);
2179         if (!sg) {
2180                 cifs_dbg(VFS, "%s: Failed to init sg", __func__);
2181                 rc = -ENOMEM;
2182                 goto free_req;
2183         }
2184
2185         iv_len = crypto_aead_ivsize(tfm);
2186         iv = kzalloc(iv_len, GFP_KERNEL);
2187         if (!iv) {
2188                 cifs_dbg(VFS, "%s: Failed to alloc IV", __func__);
2189                 rc = -ENOMEM;
2190                 goto free_sg;
2191         }
2192         iv[0] = 3;
2193         memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES128CMM_NONCE);
2194
2195         aead_request_set_crypt(req, sg, sg, crypt_len, iv);
2196         aead_request_set_ad(req, assoc_data_len);
2197
2198         aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
2199                                   crypto_req_done, &wait);
2200
2201         rc = crypto_wait_req(enc ? crypto_aead_encrypt(req)
2202                                 : crypto_aead_decrypt(req), &wait);
2203
2204         if (!rc && enc)
2205                 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE);
2206
2207         kfree(iv);
2208 free_sg:
2209         kfree(sg);
2210 free_req:
2211         kfree(req);
2212         return rc;
2213 }
2214
2215 static int
2216 smb3_init_transform_rq(struct TCP_Server_Info *server, struct smb_rqst *new_rq,
2217                        struct smb_rqst *old_rq)
2218 {
2219         struct kvec *iov;
2220         struct page **pages;
2221         struct smb2_transform_hdr *tr_hdr;
2222         unsigned int npages = old_rq->rq_npages;
2223         int i;
2224         int rc = -ENOMEM;
2225
2226         pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
2227         if (!pages)
2228                 return rc;
2229
2230         new_rq->rq_pages = pages;
2231         new_rq->rq_npages = old_rq->rq_npages;
2232         new_rq->rq_pagesz = old_rq->rq_pagesz;
2233         new_rq->rq_tailsz = old_rq->rq_tailsz;
2234
2235         for (i = 0; i < npages; i++) {
2236                 pages[i] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
2237                 if (!pages[i])
2238                         goto err_free_pages;
2239         }
2240
2241         iov = kmalloc_array(old_rq->rq_nvec, sizeof(struct kvec), GFP_KERNEL);
2242         if (!iov)
2243                 goto err_free_pages;
2244
2245         /* copy all iovs from the old except the 1st one (rfc1002 length) */
2246         memcpy(&iov[1], &old_rq->rq_iov[1],
2247                                 sizeof(struct kvec) * (old_rq->rq_nvec - 1));
2248         new_rq->rq_iov = iov;
2249         new_rq->rq_nvec = old_rq->rq_nvec;
2250
2251         tr_hdr = kmalloc(sizeof(struct smb2_transform_hdr), GFP_KERNEL);
2252         if (!tr_hdr)
2253                 goto err_free_iov;
2254
2255         /* fill the 1st iov with a transform header */
2256         fill_transform_hdr(tr_hdr, old_rq);
2257         new_rq->rq_iov[0].iov_base = tr_hdr;
2258         new_rq->rq_iov[0].iov_len = sizeof(struct smb2_transform_hdr);
2259
2260         /* copy pages form the old */
2261         for (i = 0; i < npages; i++) {
2262                 char *dst = kmap(new_rq->rq_pages[i]);
2263                 char *src = kmap(old_rq->rq_pages[i]);
2264                 unsigned int len = (i < npages - 1) ? new_rq->rq_pagesz :
2265                                                         new_rq->rq_tailsz;
2266                 memcpy(dst, src, len);
2267                 kunmap(new_rq->rq_pages[i]);
2268                 kunmap(old_rq->rq_pages[i]);
2269         }
2270
2271         rc = crypt_message(server, new_rq, 1);
2272         cifs_dbg(FYI, "encrypt message returned %d", rc);
2273         if (rc)
2274                 goto err_free_tr_hdr;
2275
2276         return rc;
2277
2278 err_free_tr_hdr:
2279         kfree(tr_hdr);
2280 err_free_iov:
2281         kfree(iov);
2282 err_free_pages:
2283         for (i = i - 1; i >= 0; i--)
2284                 put_page(pages[i]);
2285         kfree(pages);
2286         return rc;
2287 }
2288
2289 static void
2290 smb3_free_transform_rq(struct smb_rqst *rqst)
2291 {
2292         int i = rqst->rq_npages - 1;
2293
2294         for (; i >= 0; i--)
2295                 put_page(rqst->rq_pages[i]);
2296         kfree(rqst->rq_pages);
2297         /* free transform header */
2298         kfree(rqst->rq_iov[0].iov_base);
2299         kfree(rqst->rq_iov);
2300 }
2301
2302 static int
2303 smb3_is_transform_hdr(void *buf)
2304 {
2305         struct smb2_transform_hdr *trhdr = buf;
2306
2307         return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
2308 }
2309
2310 static int
2311 decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
2312                  unsigned int buf_data_size, struct page **pages,
2313                  unsigned int npages, unsigned int page_data_size)
2314 {
2315         struct kvec iov[2];
2316         struct smb_rqst rqst = {NULL};
2317         struct smb2_hdr *hdr;
2318         int rc;
2319
2320         iov[0].iov_base = buf;
2321         iov[0].iov_len = sizeof(struct smb2_transform_hdr);
2322         iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr);
2323         iov[1].iov_len = buf_data_size;
2324
2325         rqst.rq_iov = iov;
2326         rqst.rq_nvec = 2;
2327         rqst.rq_pages = pages;
2328         rqst.rq_npages = npages;
2329         rqst.rq_pagesz = PAGE_SIZE;
2330         rqst.rq_tailsz = (page_data_size % PAGE_SIZE) ? : PAGE_SIZE;
2331
2332         rc = crypt_message(server, &rqst, 0);
2333         cifs_dbg(FYI, "decrypt message returned %d\n", rc);
2334
2335         if (rc)
2336                 return rc;
2337
2338         memmove(buf + 4, iov[1].iov_base, buf_data_size);
2339         hdr = (struct smb2_hdr *)buf;
2340         hdr->smb2_buf_length = cpu_to_be32(buf_data_size + page_data_size);
2341         server->total_read = buf_data_size + page_data_size + 4;
2342
2343         return rc;
2344 }
2345
2346 static int
2347 read_data_into_pages(struct TCP_Server_Info *server, struct page **pages,
2348                      unsigned int npages, unsigned int len)
2349 {
2350         int i;
2351         int length;
2352
2353         for (i = 0; i < npages; i++) {
2354                 struct page *page = pages[i];
2355                 size_t n;
2356
2357                 n = len;
2358                 if (len >= PAGE_SIZE) {
2359                         /* enough data to fill the page */
2360                         n = PAGE_SIZE;
2361                         len -= n;
2362                 } else {
2363                         zero_user(page, len, PAGE_SIZE - len);
2364                         len = 0;
2365                 }
2366                 length = cifs_read_page_from_socket(server, page, n);
2367                 if (length < 0)
2368                         return length;
2369                 server->total_read += length;
2370         }
2371
2372         return 0;
2373 }
2374
2375 static int
2376 init_read_bvec(struct page **pages, unsigned int npages, unsigned int data_size,
2377                unsigned int cur_off, struct bio_vec **page_vec)
2378 {
2379         struct bio_vec *bvec;
2380         int i;
2381
2382         bvec = kcalloc(npages, sizeof(struct bio_vec), GFP_KERNEL);
2383         if (!bvec)
2384                 return -ENOMEM;
2385
2386         for (i = 0; i < npages; i++) {
2387                 bvec[i].bv_page = pages[i];
2388                 bvec[i].bv_offset = (i == 0) ? cur_off : 0;
2389                 bvec[i].bv_len = min_t(unsigned int, PAGE_SIZE, data_size);
2390                 data_size -= bvec[i].bv_len;
2391         }
2392
2393         if (data_size != 0) {
2394                 cifs_dbg(VFS, "%s: something went wrong\n", __func__);
2395                 kfree(bvec);
2396                 return -EIO;
2397         }
2398
2399         *page_vec = bvec;
2400         return 0;
2401 }
2402
2403 static int
2404 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
2405                  char *buf, unsigned int buf_len, struct page **pages,
2406                  unsigned int npages, unsigned int page_data_size)
2407 {
2408         unsigned int data_offset;
2409         unsigned int data_len;
2410         unsigned int cur_off;
2411         unsigned int cur_page_idx;
2412         unsigned int pad_len;
2413         struct cifs_readdata *rdata = mid->callback_data;
2414         struct smb2_sync_hdr *shdr = get_sync_hdr(buf);
2415         struct bio_vec *bvec = NULL;
2416         struct iov_iter iter;
2417         struct kvec iov;
2418         int length;
2419         bool use_rdma_mr = false;
2420
2421         if (shdr->Command != SMB2_READ) {
2422                 cifs_dbg(VFS, "only big read responses are supported\n");
2423                 return -ENOTSUPP;
2424         }
2425
2426         if (server->ops->is_session_expired &&
2427             server->ops->is_session_expired(buf)) {
2428                 cifs_reconnect(server);
2429                 wake_up(&server->response_q);
2430                 return -1;
2431         }
2432
2433         if (server->ops->is_status_pending &&
2434                         server->ops->is_status_pending(buf, server, 0))
2435                 return -1;
2436
2437         rdata->result = server->ops->map_error(buf, false);
2438         if (rdata->result != 0) {
2439                 cifs_dbg(FYI, "%s: server returned error %d\n",
2440                          __func__, rdata->result);
2441                 dequeue_mid(mid, rdata->result);
2442                 return 0;
2443         }
2444
2445         data_offset = server->ops->read_data_offset(buf) + 4;
2446 #ifdef CONFIG_CIFS_SMB_DIRECT
2447         use_rdma_mr = rdata->mr;
2448 #endif
2449         data_len = server->ops->read_data_length(buf, use_rdma_mr);
2450
2451         if (data_offset < server->vals->read_rsp_size) {
2452                 /*
2453                  * win2k8 sometimes sends an offset of 0 when the read
2454                  * is beyond the EOF. Treat it as if the data starts just after
2455                  * the header.
2456                  */
2457                 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n",
2458                          __func__, data_offset);
2459                 data_offset = server->vals->read_rsp_size;
2460         } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) {
2461                 /* data_offset is beyond the end of smallbuf */
2462                 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n",
2463                          __func__, data_offset);
2464                 rdata->result = -EIO;
2465                 dequeue_mid(mid, rdata->result);
2466                 return 0;
2467         }
2468
2469         pad_len = data_offset - server->vals->read_rsp_size;
2470
2471         if (buf_len <= data_offset) {
2472                 /* read response payload is in pages */
2473                 cur_page_idx = pad_len / PAGE_SIZE;
2474                 cur_off = pad_len % PAGE_SIZE;
2475
2476                 if (cur_page_idx != 0) {
2477                         /* data offset is beyond the 1st page of response */
2478                         cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n",
2479                                  __func__, data_offset);
2480                         rdata->result = -EIO;
2481                         dequeue_mid(mid, rdata->result);
2482                         return 0;
2483                 }
2484
2485                 if (data_len > page_data_size - pad_len) {
2486                         /* data_len is corrupt -- discard frame */
2487                         rdata->result = -EIO;
2488                         dequeue_mid(mid, rdata->result);
2489                         return 0;
2490                 }
2491
2492                 rdata->result = init_read_bvec(pages, npages, page_data_size,
2493                                                cur_off, &bvec);
2494                 if (rdata->result != 0) {
2495                         dequeue_mid(mid, rdata->result);
2496                         return 0;
2497                 }
2498
2499                 iov_iter_bvec(&iter, WRITE | ITER_BVEC, bvec, npages, data_len);
2500         } else if (buf_len >= data_offset + data_len) {
2501                 /* read response payload is in buf */
2502                 WARN_ONCE(npages > 0, "read data can be either in buf or in pages");
2503                 iov.iov_base = buf + data_offset;
2504                 iov.iov_len = data_len;
2505                 iov_iter_kvec(&iter, WRITE | ITER_KVEC, &iov, 1, data_len);
2506         } else {
2507                 /* read response payload cannot be in both buf and pages */
2508                 WARN_ONCE(1, "buf can not contain only a part of read data");
2509                 rdata->result = -EIO;
2510                 dequeue_mid(mid, rdata->result);
2511                 return 0;
2512         }
2513
2514         /* set up first iov for signature check */
2515         rdata->iov[0].iov_base = buf;
2516         rdata->iov[0].iov_len = 4;
2517         rdata->iov[1].iov_base = buf + 4;
2518         rdata->iov[1].iov_len = server->vals->read_rsp_size - 4;
2519         cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
2520                  rdata->iov[0].iov_base, server->vals->read_rsp_size);
2521
2522         length = rdata->copy_into_pages(server, rdata, &iter);
2523
2524         kfree(bvec);
2525
2526         if (length < 0)
2527                 return length;
2528
2529         dequeue_mid(mid, false);
2530         return length;
2531 }
2532
2533 static int
2534 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid)
2535 {
2536         char *buf = server->smallbuf;
2537         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
2538         unsigned int npages;
2539         struct page **pages;
2540         unsigned int len;
2541         unsigned int buflen = get_rfc1002_length(buf) + 4;
2542         int rc;
2543         int i = 0;
2544
2545         len = min_t(unsigned int, buflen, server->vals->read_rsp_size - 4 +
2546                 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1;
2547
2548         rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len);
2549         if (rc < 0)
2550                 return rc;
2551         server->total_read += rc;
2552
2553         len = le32_to_cpu(tr_hdr->OriginalMessageSize) + 4 -
2554                                                 server->vals->read_rsp_size;
2555         npages = DIV_ROUND_UP(len, PAGE_SIZE);
2556
2557         pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
2558         if (!pages) {
2559                 rc = -ENOMEM;
2560                 goto discard_data;
2561         }
2562
2563         for (; i < npages; i++) {
2564                 pages[i] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
2565                 if (!pages[i]) {
2566                         rc = -ENOMEM;
2567                         goto discard_data;
2568                 }
2569         }
2570
2571         /* read read data into pages */
2572         rc = read_data_into_pages(server, pages, npages, len);
2573         if (rc)
2574                 goto free_pages;
2575
2576         rc = cifs_discard_remaining_data(server);
2577         if (rc)
2578                 goto free_pages;
2579
2580         rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size - 4,
2581                               pages, npages, len);
2582         if (rc)
2583                 goto free_pages;
2584
2585         *mid = smb2_find_mid(server, buf);
2586         if (*mid == NULL)
2587                 cifs_dbg(FYI, "mid not found\n");
2588         else {
2589                 cifs_dbg(FYI, "mid found\n");
2590                 (*mid)->decrypted = true;
2591                 rc = handle_read_data(server, *mid, buf,
2592                                       server->vals->read_rsp_size,
2593                                       pages, npages, len);
2594         }
2595
2596 free_pages:
2597         for (i = i - 1; i >= 0; i--)
2598                 put_page(pages[i]);
2599         kfree(pages);
2600         return rc;
2601 discard_data:
2602         cifs_discard_remaining_data(server);
2603         goto free_pages;
2604 }
2605
2606 static int
2607 receive_encrypted_standard(struct TCP_Server_Info *server,
2608                            struct mid_q_entry **mid)
2609 {
2610         int length;
2611         char *buf = server->smallbuf;
2612         unsigned int pdu_length = get_rfc1002_length(buf);
2613         unsigned int buf_size;
2614         struct mid_q_entry *mid_entry;
2615
2616         /* switch to large buffer if too big for a small one */
2617         if (pdu_length + 4 > MAX_CIFS_SMALL_BUFFER_SIZE) {
2618                 server->large_buf = true;
2619                 memcpy(server->bigbuf, buf, server->total_read);
2620                 buf = server->bigbuf;
2621         }
2622
2623         /* now read the rest */
2624         length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
2625                                 pdu_length - HEADER_SIZE(server) + 1 + 4);
2626         if (length < 0)
2627                 return length;
2628         server->total_read += length;
2629
2630         buf_size = pdu_length + 4 - sizeof(struct smb2_transform_hdr);
2631         length = decrypt_raw_data(server, buf, buf_size, NULL, 0, 0);
2632         if (length)
2633                 return length;
2634
2635         mid_entry = smb2_find_mid(server, buf);
2636         if (mid_entry == NULL)
2637                 cifs_dbg(FYI, "mid not found\n");
2638         else {
2639                 cifs_dbg(FYI, "mid found\n");
2640                 mid_entry->decrypted = true;
2641         }
2642
2643         *mid = mid_entry;
2644
2645         if (mid_entry && mid_entry->handle)
2646                 return mid_entry->handle(server, mid_entry);
2647
2648         return cifs_handle_standard(server, mid_entry);
2649 }
2650
2651 static int
2652 smb3_receive_transform(struct TCP_Server_Info *server, struct mid_q_entry **mid)
2653 {
2654         char *buf = server->smallbuf;
2655         unsigned int pdu_length = get_rfc1002_length(buf);
2656         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
2657         unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
2658
2659         if (pdu_length + 4 < sizeof(struct smb2_transform_hdr) +
2660                                                 sizeof(struct smb2_sync_hdr)) {
2661                 cifs_dbg(VFS, "Transform message is too small (%u)\n",
2662                          pdu_length);
2663                 cifs_reconnect(server);
2664                 wake_up(&server->response_q);
2665                 return -ECONNABORTED;
2666         }
2667
2668         if (pdu_length + 4 < orig_len + sizeof(struct smb2_transform_hdr)) {
2669                 cifs_dbg(VFS, "Transform message is broken\n");
2670                 cifs_reconnect(server);
2671                 wake_up(&server->response_q);
2672                 return -ECONNABORTED;
2673         }
2674
2675         if (pdu_length + 4 > CIFSMaxBufSize + MAX_HEADER_SIZE(server))
2676                 return receive_encrypted_read(server, mid);
2677
2678         return receive_encrypted_standard(server, mid);
2679 }
2680
2681 int
2682 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid)
2683 {
2684         char *buf = server->large_buf ? server->bigbuf : server->smallbuf;
2685
2686         return handle_read_data(server, mid, buf, get_rfc1002_length(buf) + 4,
2687                                 NULL, 0, 0);
2688 }
2689
2690 struct smb_version_operations smb20_operations = {
2691         .compare_fids = smb2_compare_fids,
2692         .setup_request = smb2_setup_request,
2693         .setup_async_request = smb2_setup_async_request,
2694         .check_receive = smb2_check_receive,
2695         .add_credits = smb2_add_credits,
2696         .set_credits = smb2_set_credits,
2697         .get_credits_field = smb2_get_credits_field,
2698         .get_credits = smb2_get_credits,
2699         .wait_mtu_credits = cifs_wait_mtu_credits,
2700         .get_next_mid = smb2_get_next_mid,
2701         .read_data_offset = smb2_read_data_offset,
2702         .read_data_length = smb2_read_data_length,
2703         .map_error = map_smb2_to_linux_error,
2704         .find_mid = smb2_find_mid,
2705         .check_message = smb2_check_message,
2706         .dump_detail = smb2_dump_detail,
2707         .clear_stats = smb2_clear_stats,
2708         .print_stats = smb2_print_stats,
2709         .is_oplock_break = smb2_is_valid_oplock_break,
2710         .handle_cancelled_mid = smb2_handle_cancelled_mid,
2711         .downgrade_oplock = smb2_downgrade_oplock,
2712         .need_neg = smb2_need_neg,
2713         .negotiate = smb2_negotiate,
2714         .negotiate_wsize = smb2_negotiate_wsize,
2715         .negotiate_rsize = smb2_negotiate_rsize,
2716         .sess_setup = SMB2_sess_setup,
2717         .logoff = SMB2_logoff,
2718         .tree_connect = SMB2_tcon,
2719         .tree_disconnect = SMB2_tdis,
2720         .qfs_tcon = smb2_qfs_tcon,
2721         .is_path_accessible = smb2_is_path_accessible,
2722         .can_echo = smb2_can_echo,
2723         .echo = SMB2_echo,
2724         .query_path_info = smb2_query_path_info,
2725         .get_srv_inum = smb2_get_srv_inum,
2726         .query_file_info = smb2_query_file_info,
2727         .set_path_size = smb2_set_path_size,
2728         .set_file_size = smb2_set_file_size,
2729         .set_file_info = smb2_set_file_info,
2730         .set_compression = smb2_set_compression,
2731         .mkdir = smb2_mkdir,
2732         .mkdir_setinfo = smb2_mkdir_setinfo,
2733         .rmdir = smb2_rmdir,
2734         .unlink = smb2_unlink,
2735         .rename = smb2_rename_path,
2736         .create_hardlink = smb2_create_hardlink,
2737         .query_symlink = smb2_query_symlink,
2738         .query_mf_symlink = smb3_query_mf_symlink,
2739         .create_mf_symlink = smb3_create_mf_symlink,
2740         .open = smb2_open_file,
2741         .set_fid = smb2_set_fid,
2742         .close = smb2_close_file,
2743         .flush = smb2_flush_file,
2744         .async_readv = smb2_async_readv,
2745         .async_writev = smb2_async_writev,
2746         .sync_read = smb2_sync_read,
2747         .sync_write = smb2_sync_write,
2748         .query_dir_first = smb2_query_dir_first,
2749         .query_dir_next = smb2_query_dir_next,
2750         .close_dir = smb2_close_dir,
2751         .calc_smb_size = smb2_calc_size,
2752         .is_status_pending = smb2_is_status_pending,
2753         .is_session_expired = smb2_is_session_expired,
2754         .oplock_response = smb2_oplock_response,
2755         .queryfs = smb2_queryfs,
2756         .mand_lock = smb2_mand_lock,
2757         .mand_unlock_range = smb2_unlock_range,
2758         .push_mand_locks = smb2_push_mandatory_locks,
2759         .get_lease_key = smb2_get_lease_key,
2760         .set_lease_key = smb2_set_lease_key,
2761         .new_lease_key = smb2_new_lease_key,
2762         .calc_signature = smb2_calc_signature,
2763         .is_read_op = smb2_is_read_op,
2764         .set_oplock_level = smb2_set_oplock_level,
2765         .create_lease_buf = smb2_create_lease_buf,
2766         .parse_lease_buf = smb2_parse_lease_buf,
2767         .copychunk_range = smb2_copychunk_range,
2768         .wp_retry_size = smb2_wp_retry_size,
2769         .dir_needs_close = smb2_dir_needs_close,
2770         .get_dfs_refer = smb2_get_dfs_refer,
2771         .select_sectype = smb2_select_sectype,
2772 #ifdef CONFIG_CIFS_XATTR
2773         .query_all_EAs = smb2_query_eas,
2774         .set_EA = smb2_set_ea,
2775 #endif /* CIFS_XATTR */
2776 #ifdef CONFIG_CIFS_ACL
2777         .get_acl = get_smb2_acl,
2778         .get_acl_by_fid = get_smb2_acl_by_fid,
2779         .set_acl = set_smb2_acl,
2780 #endif /* CIFS_ACL */
2781 };
2782
2783 struct smb_version_operations smb21_operations = {
2784         .compare_fids = smb2_compare_fids,
2785         .setup_request = smb2_setup_request,
2786         .setup_async_request = smb2_setup_async_request,
2787         .check_receive = smb2_check_receive,
2788         .add_credits = smb2_add_credits,
2789         .set_credits = smb2_set_credits,
2790         .get_credits_field = smb2_get_credits_field,
2791         .get_credits = smb2_get_credits,
2792         .wait_mtu_credits = smb2_wait_mtu_credits,
2793         .get_next_mid = smb2_get_next_mid,
2794         .read_data_offset = smb2_read_data_offset,
2795         .read_data_length = smb2_read_data_length,
2796         .map_error = map_smb2_to_linux_error,
2797         .find_mid = smb2_find_mid,
2798         .check_message = smb2_check_message,
2799         .dump_detail = smb2_dump_detail,
2800         .clear_stats = smb2_clear_stats,
2801         .print_stats = smb2_print_stats,
2802         .is_oplock_break = smb2_is_valid_oplock_break,
2803         .handle_cancelled_mid = smb2_handle_cancelled_mid,
2804         .downgrade_oplock = smb2_downgrade_oplock,
2805         .need_neg = smb2_need_neg,
2806         .negotiate = smb2_negotiate,
2807         .negotiate_wsize = smb2_negotiate_wsize,
2808         .negotiate_rsize = smb2_negotiate_rsize,
2809         .sess_setup = SMB2_sess_setup,
2810         .logoff = SMB2_logoff,
2811         .tree_connect = SMB2_tcon,
2812         .tree_disconnect = SMB2_tdis,
2813         .qfs_tcon = smb2_qfs_tcon,
2814         .is_path_accessible = smb2_is_path_accessible,
2815         .can_echo = smb2_can_echo,
2816         .echo = SMB2_echo,
2817         .query_path_info = smb2_query_path_info,
2818         .get_srv_inum = smb2_get_srv_inum,
2819         .query_file_info = smb2_query_file_info,
2820         .set_path_size = smb2_set_path_size,
2821         .set_file_size = smb2_set_file_size,
2822         .set_file_info = smb2_set_file_info,
2823         .set_compression = smb2_set_compression,
2824         .mkdir = smb2_mkdir,
2825         .mkdir_setinfo = smb2_mkdir_setinfo,
2826         .rmdir = smb2_rmdir,
2827         .unlink = smb2_unlink,
2828         .rename = smb2_rename_path,
2829         .create_hardlink = smb2_create_hardlink,
2830         .query_symlink = smb2_query_symlink,
2831         .query_mf_symlink = smb3_query_mf_symlink,
2832         .create_mf_symlink = smb3_create_mf_symlink,
2833         .open = smb2_open_file,
2834         .set_fid = smb2_set_fid,
2835         .close = smb2_close_file,
2836         .flush = smb2_flush_file,
2837         .async_readv = smb2_async_readv,
2838         .async_writev = smb2_async_writev,
2839         .sync_read = smb2_sync_read,
2840         .sync_write = smb2_sync_write,
2841         .query_dir_first = smb2_query_dir_first,
2842         .query_dir_next = smb2_query_dir_next,
2843         .close_dir = smb2_close_dir,
2844         .calc_smb_size = smb2_calc_size,
2845         .is_status_pending = smb2_is_status_pending,
2846         .is_session_expired = smb2_is_session_expired,
2847         .oplock_response = smb2_oplock_response,
2848         .queryfs = smb2_queryfs,
2849         .mand_lock = smb2_mand_lock,
2850         .mand_unlock_range = smb2_unlock_range,
2851         .push_mand_locks = smb2_push_mandatory_locks,
2852         .get_lease_key = smb2_get_lease_key,
2853         .set_lease_key = smb2_set_lease_key,
2854         .new_lease_key = smb2_new_lease_key,
2855         .calc_signature = smb2_calc_signature,
2856         .is_read_op = smb21_is_read_op,
2857         .set_oplock_level = smb21_set_oplock_level,
2858         .create_lease_buf = smb2_create_lease_buf,
2859         .parse_lease_buf = smb2_parse_lease_buf,
2860         .copychunk_range = smb2_copychunk_range,
2861         .wp_retry_size = smb2_wp_retry_size,
2862         .dir_needs_close = smb2_dir_needs_close,
2863         .enum_snapshots = smb3_enum_snapshots,
2864         .get_dfs_refer = smb2_get_dfs_refer,
2865         .select_sectype = smb2_select_sectype,
2866 #ifdef CONFIG_CIFS_XATTR
2867         .query_all_EAs = smb2_query_eas,
2868         .set_EA = smb2_set_ea,
2869 #endif /* CIFS_XATTR */
2870 #ifdef CONFIG_CIFS_ACL
2871         .get_acl = get_smb2_acl,
2872         .get_acl_by_fid = get_smb2_acl_by_fid,
2873         .set_acl = set_smb2_acl,
2874 #endif /* CIFS_ACL */
2875 };
2876
2877 struct smb_version_operations smb30_operations = {
2878         .compare_fids = smb2_compare_fids,
2879         .setup_request = smb2_setup_request,
2880         .setup_async_request = smb2_setup_async_request,
2881         .check_receive = smb2_check_receive,
2882         .add_credits = smb2_add_credits,
2883         .set_credits = smb2_set_credits,
2884         .get_credits_field = smb2_get_credits_field,
2885         .get_credits = smb2_get_credits,
2886         .wait_mtu_credits = smb2_wait_mtu_credits,
2887         .get_next_mid = smb2_get_next_mid,
2888         .read_data_offset = smb2_read_data_offset,
2889         .read_data_length = smb2_read_data_length,
2890         .map_error = map_smb2_to_linux_error,
2891         .find_mid = smb2_find_mid,
2892         .check_message = smb2_check_message,
2893         .dump_detail = smb2_dump_detail,
2894         .clear_stats = smb2_clear_stats,
2895         .print_stats = smb2_print_stats,
2896         .dump_share_caps = smb2_dump_share_caps,
2897         .is_oplock_break = smb2_is_valid_oplock_break,
2898         .handle_cancelled_mid = smb2_handle_cancelled_mid,
2899         .downgrade_oplock = smb2_downgrade_oplock,
2900         .need_neg = smb2_need_neg,
2901         .negotiate = smb2_negotiate,
2902         .negotiate_wsize = smb2_negotiate_wsize,
2903         .negotiate_rsize = smb2_negotiate_rsize,
2904         .sess_setup = SMB2_sess_setup,
2905         .logoff = SMB2_logoff,
2906         .tree_connect = SMB2_tcon,
2907         .tree_disconnect = SMB2_tdis,
2908         .qfs_tcon = smb3_qfs_tcon,
2909         .is_path_accessible = smb2_is_path_accessible,
2910         .can_echo = smb2_can_echo,
2911         .echo = SMB2_echo,
2912         .query_path_info = smb2_query_path_info,
2913         .get_srv_inum = smb2_get_srv_inum,
2914         .query_file_info = smb2_query_file_info,
2915         .set_path_size = smb2_set_path_size,
2916         .set_file_size = smb2_set_file_size,
2917         .set_file_info = smb2_set_file_info,
2918         .set_compression = smb2_set_compression,
2919         .mkdir = smb2_mkdir,
2920         .mkdir_setinfo = smb2_mkdir_setinfo,
2921         .rmdir = smb2_rmdir,
2922         .unlink = smb2_unlink,
2923         .rename = smb2_rename_path,
2924         .create_hardlink = smb2_create_hardlink,
2925         .query_symlink = smb2_query_symlink,
2926         .query_mf_symlink = smb3_query_mf_symlink,
2927         .create_mf_symlink = smb3_create_mf_symlink,
2928         .open = smb2_open_file,
2929         .set_fid = smb2_set_fid,
2930         .close = smb2_close_file,
2931         .flush = smb2_flush_file,
2932         .async_readv = smb2_async_readv,
2933         .async_writev = smb2_async_writev,
2934         .sync_read = smb2_sync_read,
2935         .sync_write = smb2_sync_write,
2936         .query_dir_first = smb2_query_dir_first,
2937         .query_dir_next = smb2_query_dir_next,
2938         .close_dir = smb2_close_dir,
2939         .calc_smb_size = smb2_calc_size,
2940         .is_status_pending = smb2_is_status_pending,
2941         .is_session_expired = smb2_is_session_expired,
2942         .oplock_response = smb2_oplock_response,
2943         .queryfs = smb2_queryfs,
2944         .mand_lock = smb2_mand_lock,
2945         .mand_unlock_range = smb2_unlock_range,
2946         .push_mand_locks = smb2_push_mandatory_locks,
2947         .get_lease_key = smb2_get_lease_key,
2948         .set_lease_key = smb2_set_lease_key,
2949         .new_lease_key = smb2_new_lease_key,
2950         .generate_signingkey = generate_smb30signingkey,
2951         .calc_signature = smb3_calc_signature,
2952         .set_integrity  = smb3_set_integrity,
2953         .is_read_op = smb21_is_read_op,
2954         .set_oplock_level = smb3_set_oplock_level,
2955         .create_lease_buf = smb3_create_lease_buf,
2956         .parse_lease_buf = smb3_parse_lease_buf,
2957         .copychunk_range = smb2_copychunk_range,
2958         .duplicate_extents = smb2_duplicate_extents,
2959         .validate_negotiate = smb3_validate_negotiate,
2960         .wp_retry_size = smb2_wp_retry_size,
2961         .dir_needs_close = smb2_dir_needs_close,
2962         .fallocate = smb3_fallocate,
2963         .enum_snapshots = smb3_enum_snapshots,
2964         .init_transform_rq = smb3_init_transform_rq,
2965         .free_transform_rq = smb3_free_transform_rq,
2966         .is_transform_hdr = smb3_is_transform_hdr,
2967         .receive_transform = smb3_receive_transform,
2968         .get_dfs_refer = smb2_get_dfs_refer,
2969         .select_sectype = smb2_select_sectype,
2970 #ifdef CONFIG_CIFS_XATTR
2971         .query_all_EAs = smb2_query_eas,
2972         .set_EA = smb2_set_ea,
2973 #endif /* CIFS_XATTR */
2974 #ifdef CONFIG_CIFS_ACL
2975         .get_acl = get_smb2_acl,
2976         .get_acl_by_fid = get_smb2_acl_by_fid,
2977         .set_acl = set_smb2_acl,
2978 #endif /* CIFS_ACL */
2979 };
2980
2981 #ifdef CONFIG_CIFS_SMB311
2982 struct smb_version_operations smb311_operations = {
2983         .compare_fids = smb2_compare_fids,
2984         .setup_request = smb2_setup_request,
2985         .setup_async_request = smb2_setup_async_request,
2986         .check_receive = smb2_check_receive,
2987         .add_credits = smb2_add_credits,
2988         .set_credits = smb2_set_credits,
2989         .get_credits_field = smb2_get_credits_field,
2990         .get_credits = smb2_get_credits,
2991         .wait_mtu_credits = smb2_wait_mtu_credits,
2992         .get_next_mid = smb2_get_next_mid,
2993         .read_data_offset = smb2_read_data_offset,
2994         .read_data_length = smb2_read_data_length,
2995         .map_error = map_smb2_to_linux_error,
2996         .find_mid = smb2_find_mid,
2997         .check_message = smb2_check_message,
2998         .dump_detail = smb2_dump_detail,
2999         .clear_stats = smb2_clear_stats,
3000         .print_stats = smb2_print_stats,
3001         .dump_share_caps = smb2_dump_share_caps,
3002         .is_oplock_break = smb2_is_valid_oplock_break,
3003         .handle_cancelled_mid = smb2_handle_cancelled_mid,
3004         .downgrade_oplock = smb2_downgrade_oplock,
3005         .need_neg = smb2_need_neg,
3006         .negotiate = smb2_negotiate,
3007         .negotiate_wsize = smb2_negotiate_wsize,
3008         .negotiate_rsize = smb2_negotiate_rsize,
3009         .sess_setup = SMB2_sess_setup,
3010         .logoff = SMB2_logoff,
3011         .tree_connect = SMB2_tcon,
3012         .tree_disconnect = SMB2_tdis,
3013         .qfs_tcon = smb3_qfs_tcon,
3014         .is_path_accessible = smb2_is_path_accessible,
3015         .can_echo = smb2_can_echo,
3016         .echo = SMB2_echo,
3017         .query_path_info = smb2_query_path_info,
3018         .get_srv_inum = smb2_get_srv_inum,
3019         .query_file_info = smb2_query_file_info,
3020         .set_path_size = smb2_set_path_size,
3021         .set_file_size = smb2_set_file_size,
3022         .set_file_info = smb2_set_file_info,
3023         .set_compression = smb2_set_compression,
3024         .mkdir = smb2_mkdir,
3025         .mkdir_setinfo = smb2_mkdir_setinfo,
3026         .rmdir = smb2_rmdir,
3027         .unlink = smb2_unlink,
3028         .rename = smb2_rename_path,
3029         .create_hardlink = smb2_create_hardlink,
3030         .query_symlink = smb2_query_symlink,
3031         .query_mf_symlink = smb3_query_mf_symlink,
3032         .create_mf_symlink = smb3_create_mf_symlink,
3033         .open = smb2_open_file,
3034         .set_fid = smb2_set_fid,
3035         .close = smb2_close_file,
3036         .flush = smb2_flush_file,
3037         .async_readv = smb2_async_readv,
3038         .async_writev = smb2_async_writev,
3039         .sync_read = smb2_sync_read,
3040         .sync_write = smb2_sync_write,
3041         .query_dir_first = smb2_query_dir_first,
3042         .query_dir_next = smb2_query_dir_next,
3043         .close_dir = smb2_close_dir,
3044         .calc_smb_size = smb2_calc_size,
3045         .is_status_pending = smb2_is_status_pending,
3046         .is_session_expired = smb2_is_session_expired,
3047         .oplock_response = smb2_oplock_response,
3048         .queryfs = smb2_queryfs,
3049         .mand_lock = smb2_mand_lock,
3050         .mand_unlock_range = smb2_unlock_range,
3051         .push_mand_locks = smb2_push_mandatory_locks,
3052         .get_lease_key = smb2_get_lease_key,
3053         .set_lease_key = smb2_set_lease_key,
3054         .new_lease_key = smb2_new_lease_key,
3055         .generate_signingkey = generate_smb311signingkey,
3056         .calc_signature = smb3_calc_signature,
3057         .set_integrity  = smb3_set_integrity,
3058         .is_read_op = smb21_is_read_op,
3059         .set_oplock_level = smb3_set_oplock_level,
3060         .create_lease_buf = smb3_create_lease_buf,
3061         .parse_lease_buf = smb3_parse_lease_buf,
3062         .copychunk_range = smb2_copychunk_range,
3063         .duplicate_extents = smb2_duplicate_extents,
3064 /*      .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
3065         .wp_retry_size = smb2_wp_retry_size,
3066         .dir_needs_close = smb2_dir_needs_close,
3067         .fallocate = smb3_fallocate,
3068         .enum_snapshots = smb3_enum_snapshots,
3069         .init_transform_rq = smb3_init_transform_rq,
3070         .free_transform_rq = smb3_free_transform_rq,
3071         .is_transform_hdr = smb3_is_transform_hdr,
3072         .receive_transform = smb3_receive_transform,
3073         .get_dfs_refer = smb2_get_dfs_refer,
3074         .select_sectype = smb2_select_sectype,
3075 #ifdef CONFIG_CIFS_XATTR
3076         .query_all_EAs = smb2_query_eas,
3077         .set_EA = smb2_set_ea,
3078 #endif /* CIFS_XATTR */
3079 };
3080 #endif /* CIFS_SMB311 */
3081
3082 struct smb_version_values smb20_values = {
3083         .version_string = SMB20_VERSION_STRING,
3084         .protocol_id = SMB20_PROT_ID,
3085         .req_capabilities = 0, /* MBZ */
3086         .large_lock_type = 0,
3087         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3088         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3089         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3090         .header_size = sizeof(struct smb2_hdr),
3091         .max_header_size = MAX_SMB2_HDR_SIZE,
3092         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3093         .lock_cmd = SMB2_LOCK,
3094         .cap_unix = 0,
3095         .cap_nt_find = SMB2_NT_FIND,
3096         .cap_large_files = SMB2_LARGE_FILES,
3097         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3098         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3099         .create_lease_size = sizeof(struct create_lease),
3100 };
3101
3102 struct smb_version_values smb21_values = {
3103         .version_string = SMB21_VERSION_STRING,
3104         .protocol_id = SMB21_PROT_ID,
3105         .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
3106         .large_lock_type = 0,
3107         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3108         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3109         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3110         .header_size = sizeof(struct smb2_hdr),
3111         .max_header_size = MAX_SMB2_HDR_SIZE,
3112         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3113         .lock_cmd = SMB2_LOCK,
3114         .cap_unix = 0,
3115         .cap_nt_find = SMB2_NT_FIND,
3116         .cap_large_files = SMB2_LARGE_FILES,
3117         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3118         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3119         .create_lease_size = sizeof(struct create_lease),
3120 };
3121
3122 struct smb_version_values smb3any_values = {
3123         .version_string = SMB3ANY_VERSION_STRING,
3124         .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
3125         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
3126         .large_lock_type = 0,
3127         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3128         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3129         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3130         .header_size = sizeof(struct smb2_hdr),
3131         .max_header_size = MAX_SMB2_HDR_SIZE,
3132         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3133         .lock_cmd = SMB2_LOCK,
3134         .cap_unix = 0,
3135         .cap_nt_find = SMB2_NT_FIND,
3136         .cap_large_files = SMB2_LARGE_FILES,
3137         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3138         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3139         .create_lease_size = sizeof(struct create_lease_v2),
3140 };
3141
3142 struct smb_version_values smbdefault_values = {
3143         .version_string = SMBDEFAULT_VERSION_STRING,
3144         .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
3145         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
3146         .large_lock_type = 0,
3147         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3148         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3149         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3150         .header_size = sizeof(struct smb2_hdr),
3151         .max_header_size = MAX_SMB2_HDR_SIZE,
3152         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3153         .lock_cmd = SMB2_LOCK,
3154         .cap_unix = 0,
3155         .cap_nt_find = SMB2_NT_FIND,
3156         .cap_large_files = SMB2_LARGE_FILES,
3157         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3158         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3159         .create_lease_size = sizeof(struct create_lease_v2),
3160 };
3161
3162 struct smb_version_values smb30_values = {
3163         .version_string = SMB30_VERSION_STRING,
3164         .protocol_id = SMB30_PROT_ID,
3165         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
3166         .large_lock_type = 0,
3167         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3168         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3169         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3170         .header_size = sizeof(struct smb2_hdr),
3171         .max_header_size = MAX_SMB2_HDR_SIZE,
3172         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3173         .lock_cmd = SMB2_LOCK,
3174         .cap_unix = 0,
3175         .cap_nt_find = SMB2_NT_FIND,
3176         .cap_large_files = SMB2_LARGE_FILES,
3177         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3178         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3179         .create_lease_size = sizeof(struct create_lease_v2),
3180 };
3181
3182 struct smb_version_values smb302_values = {
3183         .version_string = SMB302_VERSION_STRING,
3184         .protocol_id = SMB302_PROT_ID,
3185         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
3186         .large_lock_type = 0,
3187         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3188         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3189         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3190         .header_size = sizeof(struct smb2_hdr),
3191         .max_header_size = MAX_SMB2_HDR_SIZE,
3192         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3193         .lock_cmd = SMB2_LOCK,
3194         .cap_unix = 0,
3195         .cap_nt_find = SMB2_NT_FIND,
3196         .cap_large_files = SMB2_LARGE_FILES,
3197         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3198         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3199         .create_lease_size = sizeof(struct create_lease_v2),
3200 };
3201
3202 #ifdef CONFIG_CIFS_SMB311
3203 struct smb_version_values smb311_values = {
3204         .version_string = SMB311_VERSION_STRING,
3205         .protocol_id = SMB311_PROT_ID,
3206         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
3207         .large_lock_type = 0,
3208         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3209         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3210         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3211         .header_size = sizeof(struct smb2_hdr),
3212         .max_header_size = MAX_SMB2_HDR_SIZE,
3213         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3214         .lock_cmd = SMB2_LOCK,
3215         .cap_unix = 0,
3216         .cap_nt_find = SMB2_NT_FIND,
3217         .cap_large_files = SMB2_LARGE_FILES,
3218         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3219         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3220         .create_lease_size = sizeof(struct create_lease_v2),
3221 };
3222 #endif /* SMB311 */