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 "cifsglob.h"
  24 #include "smb2pdu.h"
  25 #include "smb2proto.h"
  26 #include "cifsproto.h"
  27 #include "cifs_debug.h"
  28 #include "cifs_unicode.h"
  29 #include "smb2status.h"
  30 #include "smb2glob.h"
  31
  32 static int
  33 change_conf(struct TCP_Server_Info *server)
  34 {
  35         server->credits += server->echo_credits + server->oplock_credits;
  36         server->oplock_credits = server->echo_credits = 0;
  37         switch (server->credits) {
  38         case 0:
  39                 return -1;
  40         case 1:
  41                 server->echoes = false;
  42                 server->oplocks = false;
  43                 cifs_dbg(VFS, "disabling echoes and oplocks\n");
  44                 break;
  45         case 2:
  46                 server->echoes = true;
  47                 server->oplocks = false;
  48                 server->echo_credits = 1;
  49                 cifs_dbg(FYI, "disabling oplocks\n");
  50                 break;
  51         default:
  52                 server->echoes = true;
  53                 if (enable_oplocks) {
  54                         server->oplocks = true;
  55                         server->oplock_credits = 1;
  56                 } else
  57                         server->oplocks = false;
  58
  59                 server->echo_credits = 1;
  60         }
  61         server->credits -= server->echo_credits + server->oplock_credits;
  62         return 0;
  63 }
  64
  65 static void
  66 smb2_add_credits(struct TCP_Server_Info *server, const unsigned int add,
  67                  const int optype)
  68 {
  69         int *val, rc = 0;
  70         spin_lock(&server->req_lock);
  71         val = server->ops->get_credits_field(server, optype);
  72         *val += add;
  73         server->in_flight--;
  74         if (server->in_flight == 0 && (optype & CIFS_OP_MASK) != CIFS_NEG_OP)
  75                 rc = change_conf(server);
  76         /*
  77          * Sometimes server returns 0 credits on oplock break ack - we need to
  78          * rebalance credits in this case.
  79          */
  80         else if (server->in_flight > 0 && server->oplock_credits == 0 &&
  81                  server->oplocks) {
  82                 if (server->credits > 1) {
  83                         server->credits--;
  84                         server->oplock_credits++;
  85                 }
  86         }
  87         spin_unlock(&server->req_lock);
  88         wake_up(&server->request_q);
  89         if (rc)
  90                 cifs_reconnect(server);
  91 }
  92
  93 static void
  94 smb2_set_credits(struct TCP_Server_Info *server, const int val)
  95 {
  96         spin_lock(&server->req_lock);
  97         server->credits = val;
  98         spin_unlock(&server->req_lock);
  99 }
 100
 101 static int *
 102 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
 103 {
 104         switch (optype) {
 105         case CIFS_ECHO_OP:
 106                 return &server->echo_credits;
 107         case CIFS_OBREAK_OP:
 108                 return &server->oplock_credits;
 109         default:
 110                 return &server->credits;
 111         }
 112 }
 113
 114 static unsigned int
 115 smb2_get_credits(struct mid_q_entry *mid)
 116 {
 117         return le16_to_cpu(((struct smb2_hdr *)mid->resp_buf)->CreditRequest);
 118 }
 119
 120 static int
 121 smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
 122                       unsigned int *num, unsigned int *credits)
 123 {
 124         int rc = 0;
 125         unsigned int scredits;
 126
 127         spin_lock(&server->req_lock);
 128         while (1) {
 129                 if (server->credits <= 0) {
 130                         spin_unlock(&server->req_lock);
 131                         cifs_num_waiters_inc(server);
 132                         rc = wait_event_killable(server->request_q,
 133                                         has_credits(server, &server->credits));
 134                         cifs_num_waiters_dec(server);
 135                         if (rc)
 136                                 return rc;
 137                         spin_lock(&server->req_lock);
 138                 } else {
 139                         if (server->tcpStatus == CifsExiting) {
 140                                 spin_unlock(&server->req_lock);
 141                                 return -ENOENT;
 142                         }
 143
 144                         scredits = server->credits;
 145                         /* can deadlock with reopen */
 146                         if (scredits <= 8) {
 147                                 *num = SMB2_MAX_BUFFER_SIZE;
 148                                 *credits = 0;
 149                                 break;
 150                         }
 151
 152                         /* leave some credits for reopen and other ops */
 153                         scredits -= 8;
 154                         *num = min_t(unsigned int, size,
 155                                      scredits * SMB2_MAX_BUFFER_SIZE);
 156
 157                         *credits = DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE);
 158                         server->credits -= *credits;
 159                         server->in_flight++;
 160                         break;
 161                 }
 162         }
 163         spin_unlock(&server->req_lock);
 164         return rc;
 165 }
 166
 167 static __u64
 168 smb2_get_next_mid(struct TCP_Server_Info *server)
 169 {
 170         __u64 mid;
 171         /* for SMB2 we need the current value */
 172         spin_lock(&GlobalMid_Lock);
 173         mid = server->CurrentMid++;
 174         spin_unlock(&GlobalMid_Lock);
 175         return mid;
 176 }
 177
 178 static struct mid_q_entry *
 179 smb2_find_mid(struct TCP_Server_Info *server, char *buf)
 180 {
 181         struct mid_q_entry *mid;
 182         struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
 183         __u64 wire_mid = le64_to_cpu(hdr->MessageId);
 184
 185         spin_lock(&GlobalMid_Lock);
 186         list_for_each_entry(mid, &server->pending_mid_q, qhead) {
 187                 if ((mid->mid == wire_mid) &&
 188                     (mid->mid_state == MID_REQUEST_SUBMITTED) &&
 189                     (mid->command == hdr->Command)) {
 190                         spin_unlock(&GlobalMid_Lock);
 191                         return mid;
 192                 }
 193         }
 194         spin_unlock(&GlobalMid_Lock);
 195         return NULL;
 196 }
 197
 198 static void
 199 smb2_dump_detail(void *buf)
 200 {
 201 #ifdef CONFIG_CIFS_DEBUG2
 202         struct smb2_hdr *smb = (struct smb2_hdr *)buf;
 203
 204         cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
 205                  smb->Command, smb->Status, smb->Flags, smb->MessageId,
 206                  smb->ProcessId);
 207         cifs_dbg(VFS, "smb buf %p len %u\n", smb, smb2_calc_size(smb));
 208 #endif
 209 }
 210
 211 static bool
 212 smb2_need_neg(struct TCP_Server_Info *server)
 213 {
 214         return server->max_read == 0;
 215 }
 216
 217 static int
 218 smb2_negotiate(const unsigned int xid, struct cifs_ses *ses)
 219 {
 220         int rc;
 221         ses->server->CurrentMid = 0;
 222         rc = SMB2_negotiate(xid, ses);
 223         /* BB we probably don't need to retry with modern servers */
 224         if (rc == -EAGAIN)
 225                 rc = -EHOSTDOWN;
 226         return rc;
 227 }
 228
 229 static unsigned int
 230 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 231 {
 232         struct TCP_Server_Info *server = tcon->ses->server;
 233         unsigned int wsize;
 234
 235         /* start with specified wsize, or default */
 236         wsize = volume_info->wsize ? volume_info->wsize : CIFS_DEFAULT_IOSIZE;
 237         wsize = min_t(unsigned int, wsize, server->max_write);
 238
 239         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 240                 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
 241
 242         return wsize;
 243 }
 244
 245 static unsigned int
 246 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 247 {
 248         struct TCP_Server_Info *server = tcon->ses->server;
 249         unsigned int rsize;
 250
 251         /* start with specified rsize, or default */
 252         rsize = volume_info->rsize ? volume_info->rsize : CIFS_DEFAULT_IOSIZE;
 253         rsize = min_t(unsigned int, rsize, server->max_read);
 254
 255         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 256                 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
 257
 258         return rsize;
 259 }
 260
 261 #ifdef CONFIG_CIFS_STATS2
 262 static int
 263 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon)
 264 {
 265         int rc;
 266         unsigned int ret_data_len = 0;
 267         struct network_interface_info_ioctl_rsp *out_buf;
 268
 269         rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
 270                         FSCTL_QUERY_NETWORK_INTERFACE_INFO, true /* is_fsctl */,
 271                         NULL /* no data input */, 0 /* no data input */,
 272                         (char **)&out_buf, &ret_data_len);
 273         if (rc != 0)
 274                 cifs_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
 275         else if (ret_data_len < sizeof(struct network_interface_info_ioctl_rsp)) {
 276                 cifs_dbg(VFS, "server returned bad net interface info buf\n");
 277                 rc = -EINVAL;
 278         } else {
 279                 /* Dump info on first interface */
 280                 cifs_dbg(FYI, "Adapter Capability 0x%x\t",
 281                         le32_to_cpu(out_buf->Capability));
 282                 cifs_dbg(FYI, "Link Speed %lld\n",
 283                         le64_to_cpu(out_buf->LinkSpeed));
 284         }
 285         kfree(out_buf);
 286         return rc;
 287 }
 288 #endif /* STATS2 */
 289
 290 static void
 291 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
 292 {
 293         int rc;
 294         __le16 srch_path = 0; /* Null - open root of share */
 295         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 296         struct cifs_open_parms oparms;
 297         struct cifs_fid fid;
 298
 299         oparms.tcon = tcon;
 300         oparms.desired_access = FILE_READ_ATTRIBUTES;
 301         oparms.disposition = FILE_OPEN;
 302         oparms.create_options = 0;
 303         oparms.fid = &fid;
 304         oparms.reconnect = false;
 305
 306         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
 307         if (rc)
 308                 return;
 309
 310 #ifdef CONFIG_CIFS_STATS2
 311         SMB3_request_interfaces(xid, tcon);
 312 #endif /* STATS2 */
 313
 314         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 315                         FS_ATTRIBUTE_INFORMATION);
 316         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 317                         FS_DEVICE_INFORMATION);
 318         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 319                         FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
 320         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 321         return;
 322 }
 323
 324 static void
 325 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
 326 {
 327         int rc;
 328         __le16 srch_path = 0; /* Null - open root of share */
 329         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 330         struct cifs_open_parms oparms;
 331         struct cifs_fid fid;
 332
 333         oparms.tcon = tcon;
 334         oparms.desired_access = FILE_READ_ATTRIBUTES;
 335         oparms.disposition = FILE_OPEN;
 336         oparms.create_options = 0;
 337         oparms.fid = &fid;
 338         oparms.reconnect = false;
 339
 340         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
 341         if (rc)
 342                 return;
 343
 344         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 345                         FS_ATTRIBUTE_INFORMATION);
 346         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 347                         FS_DEVICE_INFORMATION);
 348         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 349         return;
 350 }
 351
 352 static int
 353 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
 354                         struct cifs_sb_info *cifs_sb, const char *full_path)
 355 {
 356         int rc;
 357         __le16 *utf16_path;
 358         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 359         struct cifs_open_parms oparms;
 360         struct cifs_fid fid;
 361
 362         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
 363         if (!utf16_path)
 364                 return -ENOMEM;
 365
 366         oparms.tcon = tcon;
 367         oparms.desired_access = FILE_READ_ATTRIBUTES;
 368         oparms.disposition = FILE_OPEN;
 369         oparms.create_options = 0;
 370         oparms.fid = &fid;
 371         oparms.reconnect = false;
 372
 373         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
 374         if (rc) {
 375                 kfree(utf16_path);
 376                 return rc;
 377         }
 378
 379         rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 380         kfree(utf16_path);
 381         return rc;
 382 }
 383
 384 static int
 385 smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
 386                   struct cifs_sb_info *cifs_sb, const char *full_path,
 387                   u64 *uniqueid, FILE_ALL_INFO *data)
 388 {
 389         *uniqueid = le64_to_cpu(data->IndexNumber);
 390         return 0;
 391 }
 392
 393 static int
 394 smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
 395                      struct cifs_fid *fid, FILE_ALL_INFO *data)
 396 {
 397         int rc;
 398         struct smb2_file_all_info *smb2_data;
 399
 400         smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
 401                             GFP_KERNEL);
 402         if (smb2_data == NULL)
 403                 return -ENOMEM;
 404
 405         rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid,
 406                              smb2_data);
 407         if (!rc)
 408                 move_smb2_info_to_cifs(data, smb2_data);
 409         kfree(smb2_data);
 410         return rc;
 411 }
 412
 413 static bool
 414 smb2_can_echo(struct TCP_Server_Info *server)
 415 {
 416         return server->echoes;
 417 }
 418
 419 static void
 420 smb2_clear_stats(struct cifs_tcon *tcon)
 421 {
 422 #ifdef CONFIG_CIFS_STATS
 423         int i;
 424         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
 425                 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
 426                 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
 427         }
 428 #endif
 429 }
 430
 431 static void
 432 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
 433 {
 434         seq_puts(m, "\n\tShare Capabilities:");
 435         if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
 436                 seq_puts(m, " DFS,");
 437         if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
 438                 seq_puts(m, " CONTINUOUS AVAILABILITY,");
 439         if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
 440                 seq_puts(m, " SCALEOUT,");
 441         if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
 442                 seq_puts(m, " CLUSTER,");
 443         if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
 444                 seq_puts(m, " ASYMMETRIC,");
 445         if (tcon->capabilities == 0)
 446                 seq_puts(m, " None");
 447         if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
 448                 seq_puts(m, " Aligned,");
 449         if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
 450                 seq_puts(m, " Partition Aligned,");
 451         if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
 452                 seq_puts(m, " SSD,");
 453         if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
 454                 seq_puts(m, " TRIM-support,");
 455
 456         seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
 457         if (tcon->perf_sector_size)
 458                 seq_printf(m, "\tOptimal sector size: 0x%x",
 459                            tcon->perf_sector_size);
 460 }
 461
 462 static void
 463 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
 464 {
 465 #ifdef CONFIG_CIFS_STATS
 466         atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
 467         atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
 468         seq_printf(m, "\nNegotiates: %d sent %d failed",
 469                    atomic_read(&sent[SMB2_NEGOTIATE_HE]),
 470                    atomic_read(&failed[SMB2_NEGOTIATE_HE]));
 471         seq_printf(m, "\nSessionSetups: %d sent %d failed",
 472                    atomic_read(&sent[SMB2_SESSION_SETUP_HE]),
 473                    atomic_read(&failed[SMB2_SESSION_SETUP_HE]));
 474         seq_printf(m, "\nLogoffs: %d sent %d failed",
 475                    atomic_read(&sent[SMB2_LOGOFF_HE]),
 476                    atomic_read(&failed[SMB2_LOGOFF_HE]));
 477         seq_printf(m, "\nTreeConnects: %d sent %d failed",
 478                    atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
 479                    atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
 480         seq_printf(m, "\nTreeDisconnects: %d sent %d failed",
 481                    atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
 482                    atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
 483         seq_printf(m, "\nCreates: %d sent %d failed",
 484                    atomic_read(&sent[SMB2_CREATE_HE]),
 485                    atomic_read(&failed[SMB2_CREATE_HE]));
 486         seq_printf(m, "\nCloses: %d sent %d failed",
 487                    atomic_read(&sent[SMB2_CLOSE_HE]),
 488                    atomic_read(&failed[SMB2_CLOSE_HE]));
 489         seq_printf(m, "\nFlushes: %d sent %d failed",
 490                    atomic_read(&sent[SMB2_FLUSH_HE]),
 491                    atomic_read(&failed[SMB2_FLUSH_HE]));
 492         seq_printf(m, "\nReads: %d sent %d failed",
 493                    atomic_read(&sent[SMB2_READ_HE]),
 494                    atomic_read(&failed[SMB2_READ_HE]));
 495         seq_printf(m, "\nWrites: %d sent %d failed",
 496                    atomic_read(&sent[SMB2_WRITE_HE]),
 497                    atomic_read(&failed[SMB2_WRITE_HE]));
 498         seq_printf(m, "\nLocks: %d sent %d failed",
 499                    atomic_read(&sent[SMB2_LOCK_HE]),
 500                    atomic_read(&failed[SMB2_LOCK_HE]));
 501         seq_printf(m, "\nIOCTLs: %d sent %d failed",
 502                    atomic_read(&sent[SMB2_IOCTL_HE]),
 503                    atomic_read(&failed[SMB2_IOCTL_HE]));
 504         seq_printf(m, "\nCancels: %d sent %d failed",
 505                    atomic_read(&sent[SMB2_CANCEL_HE]),
 506                    atomic_read(&failed[SMB2_CANCEL_HE]));
 507         seq_printf(m, "\nEchos: %d sent %d failed",
 508                    atomic_read(&sent[SMB2_ECHO_HE]),
 509                    atomic_read(&failed[SMB2_ECHO_HE]));
 510         seq_printf(m, "\nQueryDirectories: %d sent %d failed",
 511                    atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
 512                    atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
 513         seq_printf(m, "\nChangeNotifies: %d sent %d failed",
 514                    atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
 515                    atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
 516         seq_printf(m, "\nQueryInfos: %d sent %d failed",
 517                    atomic_read(&sent[SMB2_QUERY_INFO_HE]),
 518                    atomic_read(&failed[SMB2_QUERY_INFO_HE]));
 519         seq_printf(m, "\nSetInfos: %d sent %d failed",
 520                    atomic_read(&sent[SMB2_SET_INFO_HE]),
 521                    atomic_read(&failed[SMB2_SET_INFO_HE]));
 522         seq_printf(m, "\nOplockBreaks: %d sent %d failed",
 523                    atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
 524                    atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
 525 #endif
 526 }
 527
 528 static void
 529 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
 530 {
 531         struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
 532         struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
 533
 534         cfile->fid.persistent_fid = fid->persistent_fid;
 535         cfile->fid.volatile_fid = fid->volatile_fid;
 536         server->ops->set_oplock_level(cinode, oplock, fid->epoch,
 537                                       &fid->purge_cache);
 538         cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
 539         memcpy(cfile->fid.create_guid, fid->create_guid, 16);
 540 }
 541
 542 static void
 543 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
 544                 struct cifs_fid *fid)
 545 {
 546         SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 547 }
 548
 549 static int
 550 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
 551                      u64 persistent_fid, u64 volatile_fid,
 552                      struct copychunk_ioctl *pcchunk)
 553 {
 554         int rc;
 555         unsigned int ret_data_len;
 556         struct resume_key_req *res_key;
 557
 558         rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
 559                         FSCTL_SRV_REQUEST_RESUME_KEY, true /* is_fsctl */,
 560                         NULL, 0 /* no input */,
 561                         (char **)&res_key, &ret_data_len);
 562
 563         if (rc) {
 564                 cifs_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
 565                 goto req_res_key_exit;
 566         }
 567         if (ret_data_len < sizeof(struct resume_key_req)) {
 568                 cifs_dbg(VFS, "Invalid refcopy resume key length\n");
 569                 rc = -EINVAL;
 570                 goto req_res_key_exit;
 571         }
 572         memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
 573
 574 req_res_key_exit:
 575         kfree(res_key);
 576         return rc;
 577 }
 578
 579 static int
 580 smb2_clone_range(const unsigned int xid,
 581                         struct cifsFileInfo *srcfile,
 582                         struct cifsFileInfo *trgtfile, u64 src_off,
 583                         u64 len, u64 dest_off)
 584 {
 585         int rc;
 586         unsigned int ret_data_len;
 587         struct copychunk_ioctl *pcchunk;
 588         struct copychunk_ioctl_rsp *retbuf = NULL;
 589         struct cifs_tcon *tcon;
 590         int chunks_copied = 0;
 591         bool chunk_sizes_updated = false;
 592
 593         pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
 594
 595         if (pcchunk == NULL)
 596                 return -ENOMEM;
 597
 598         cifs_dbg(FYI, "in smb2_clone_range - about to call request res key\n");
 599         /* Request a key from the server to identify the source of the copy */
 600         rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
 601                                 srcfile->fid.persistent_fid,
 602                                 srcfile->fid.volatile_fid, pcchunk);
 603
 604         /* Note: request_res_key sets res_key null only if rc !=0 */
 605         if (rc)
 606                 goto cchunk_out;
 607
 608         /* For now array only one chunk long, will make more flexible later */
 609         pcchunk->ChunkCount = cpu_to_le32(1);
 610         pcchunk->Reserved = 0;
 611         pcchunk->Reserved2 = 0;
 612
 613         tcon = tlink_tcon(trgtfile->tlink);
 614
 615         while (len > 0) {
 616                 pcchunk->SourceOffset = cpu_to_le64(src_off);
 617                 pcchunk->TargetOffset = cpu_to_le64(dest_off);
 618                 pcchunk->Length =
 619                         cpu_to_le32(min_t(u32, len, tcon->max_bytes_chunk));
 620
 621                 /* Request server copy to target from src identified by key */
 622                 kfree(retbuf);
 623                 retbuf = NULL;
 624                 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
 625                         trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
 626                         true /* is_fsctl */, (char *)pcchunk,
 627                         sizeof(struct copychunk_ioctl), (char **)&retbuf,
 628                         &ret_data_len);
 629                 if (rc == 0) {
 630                         if (ret_data_len !=
 631                                         sizeof(struct copychunk_ioctl_rsp)) {
 632                                 cifs_dbg(VFS, "invalid cchunk response size\n");
 633                                 rc = -EIO;
 634                                 goto cchunk_out;
 635                         }
 636                         if (retbuf->TotalBytesWritten == 0) {
 637                                 cifs_dbg(FYI, "no bytes copied\n");
 638                                 rc = -EIO;
 639                                 goto cchunk_out;
 640                         }
 641                         /*
 642                          * Check if server claimed to write more than we asked
 643                          */
 644                         if (le32_to_cpu(retbuf->TotalBytesWritten) >
 645                             le32_to_cpu(pcchunk->Length)) {
 646                                 cifs_dbg(VFS, "invalid copy chunk response\n");
 647                                 rc = -EIO;
 648                                 goto cchunk_out;
 649                         }
 650                         if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
 651                                 cifs_dbg(VFS, "invalid num chunks written\n");
 652                                 rc = -EIO;
 653                                 goto cchunk_out;
 654                         }
 655                         chunks_copied++;
 656
 657                         src_off += le32_to_cpu(retbuf->TotalBytesWritten);
 658                         dest_off += le32_to_cpu(retbuf->TotalBytesWritten);
 659                         len -= le32_to_cpu(retbuf->TotalBytesWritten);
 660
 661                         cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %d\n",
 662                                 le32_to_cpu(retbuf->ChunksWritten),
 663                                 le32_to_cpu(retbuf->ChunkBytesWritten),
 664                                 le32_to_cpu(retbuf->TotalBytesWritten));
 665                 } else if (rc == -EINVAL) {
 666                         if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
 667                                 goto cchunk_out;
 668
 669                         cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
 670                                 le32_to_cpu(retbuf->ChunksWritten),
 671                                 le32_to_cpu(retbuf->ChunkBytesWritten),
 672                                 le32_to_cpu(retbuf->TotalBytesWritten));
 673
 674                         /*
 675                          * Check if this is the first request using these sizes,
 676                          * (ie check if copy succeed once with original sizes
 677                          * and check if the server gave us different sizes after
 678                          * we already updated max sizes on previous request).
 679                          * if not then why is the server returning an error now
 680                          */
 681                         if ((chunks_copied != 0) || chunk_sizes_updated)
 682                                 goto cchunk_out;
 683
 684                         /* Check that server is not asking us to grow size */
 685                         if (le32_to_cpu(retbuf->ChunkBytesWritten) <
 686                                         tcon->max_bytes_chunk)
 687                                 tcon->max_bytes_chunk =
 688                                         le32_to_cpu(retbuf->ChunkBytesWritten);
 689                         else
 690                                 goto cchunk_out; /* server gave us bogus size */
 691
 692                         /* No need to change MaxChunks since already set to 1 */
 693                         chunk_sizes_updated = true;
 694                 } else
 695                         goto cchunk_out;
 696         }
 697
 698 cchunk_out:
 699         kfree(pcchunk);
 700         kfree(retbuf);
 701         return rc;
 702 }
 703
 704 static int
 705 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
 706                 struct cifs_fid *fid)
 707 {
 708         return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 709 }
 710
 711 static unsigned int
 712 smb2_read_data_offset(char *buf)
 713 {
 714         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
 715         return rsp->DataOffset;
 716 }
 717
 718 static unsigned int
 719 smb2_read_data_length(char *buf)
 720 {
 721         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
 722         return le32_to_cpu(rsp->DataLength);
 723 }
 724
 725
 726 static int
 727 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
 728                struct cifs_io_parms *parms, unsigned int *bytes_read,
 729                char **buf, int *buf_type)
 730 {
 731         parms->persistent_fid = pfid->persistent_fid;
 732         parms->volatile_fid = pfid->volatile_fid;
 733         return SMB2_read(xid, parms, bytes_read, buf, buf_type);
 734 }
 735
 736 static int
 737 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
 738                 struct cifs_io_parms *parms, unsigned int *written,
 739                 struct kvec *iov, unsigned long nr_segs)
 740 {
 741
 742         parms->persistent_fid = pfid->persistent_fid;
 743         parms->volatile_fid = pfid->volatile_fid;
 744         return SMB2_write(xid, parms, written, iov, nr_segs);
 745 }
 746
 747 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
 748 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
 749                 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
 750 {
 751         struct cifsInodeInfo *cifsi;
 752         int rc;
 753
 754         cifsi = CIFS_I(inode);
 755
 756         /* if file already sparse don't bother setting sparse again */
 757         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
 758                 return true; /* already sparse */
 759
 760         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
 761                 return true; /* already not sparse */
 762
 763         /*
 764          * Can't check for sparse support on share the usual way via the
 765          * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
 766          * since Samba server doesn't set the flag on the share, yet
 767          * supports the set sparse FSCTL and returns sparse correctly
 768          * in the file attributes. If we fail setting sparse though we
 769          * mark that server does not support sparse files for this share
 770          * to avoid repeatedly sending the unsupported fsctl to server
 771          * if the file is repeatedly extended.
 772          */
 773         if (tcon->broken_sparse_sup)
 774                 return false;
 775
 776         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
 777                         cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
 778                         true /* is_fctl */, &setsparse, 1, NULL, NULL);
 779         if (rc) {
 780                 tcon->broken_sparse_sup = true;
 781                 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
 782                 return false;
 783         }
 784
 785         if (setsparse)
 786                 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
 787         else
 788                 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
 789
 790         return true;
 791 }
 792
 793 static int
 794 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
 795                    struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
 796 {
 797         __le64 eof = cpu_to_le64(size);
 798         struct inode *inode;
 799
 800         /*
 801          * If extending file more than one page make sparse. Many Linux fs
 802          * make files sparse by default when extending via ftruncate
 803          */
 804         inode = d_inode(cfile->dentry);
 805
 806         if (!set_alloc && (size > inode->i_size + 8192)) {
 807                 __u8 set_sparse = 1;
 808
 809                 /* whether set sparse succeeds or not, extend the file */
 810                 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
 811         }
 812
 813         return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
 814                             cfile->fid.volatile_fid, cfile->pid, &eof, false);
 815 }
 816
 817 static int
 818 smb2_duplicate_extents(const unsigned int xid,
 819                         struct cifsFileInfo *srcfile,
 820                         struct cifsFileInfo *trgtfile, u64 src_off,
 821                         u64 len, u64 dest_off)
 822 {
 823         int rc;
 824         unsigned int ret_data_len;
 825         struct duplicate_extents_to_file dup_ext_buf;
 826         struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
 827
 828         /* server fileays advertise duplicate extent support with this flag */
 829         if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
 830              FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
 831                 return -EOPNOTSUPP;
 832
 833         dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
 834         dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
 835         dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
 836         dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
 837         dup_ext_buf.ByteCount = cpu_to_le64(len);
 838         cifs_dbg(FYI, "duplicate extents: src off %lld dst off %lld len %lld",
 839                 src_off, dest_off, len);
 840
 841         rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
 842         if (rc)
 843                 goto duplicate_extents_out;
 844
 845         rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
 846                         trgtfile->fid.volatile_fid,
 847                         FSCTL_DUPLICATE_EXTENTS_TO_FILE,
 848                         true /* is_fsctl */, (char *)&dup_ext_buf,
 849                         sizeof(struct duplicate_extents_to_file),
 850                         NULL,
 851                         &ret_data_len);
 852
 853         if (ret_data_len > 0)
 854                 cifs_dbg(FYI, "non-zero response length in duplicate extents");
 855
 856 duplicate_extents_out:
 857         return rc;
 858 }
 859
 860 static int
 861 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
 862                    struct cifsFileInfo *cfile)
 863 {
 864         return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
 865                             cfile->fid.volatile_fid);
 866 }
 867
 868 static int
 869 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
 870                    struct cifsFileInfo *cfile)
 871 {
 872         struct fsctl_set_integrity_information_req integr_info;
 873         unsigned int ret_data_len;
 874
 875         integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
 876         integr_info.Flags = 0;
 877         integr_info.Reserved = 0;
 878
 879         return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
 880                         cfile->fid.volatile_fid,
 881                         FSCTL_SET_INTEGRITY_INFORMATION,
 882                         true /* is_fsctl */, (char *)&integr_info,
 883                         sizeof(struct fsctl_set_integrity_information_req),
 884                         NULL,
 885                         &ret_data_len);
 886
 887 }
 888
 889 static int
 890 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
 891                      const char *path, struct cifs_sb_info *cifs_sb,
 892                      struct cifs_fid *fid, __u16 search_flags,
 893                      struct cifs_search_info *srch_inf)
 894 {
 895         __le16 *utf16_path;
 896         int rc;
 897         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 898         struct cifs_open_parms oparms;
 899
 900         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
 901         if (!utf16_path)
 902                 return -ENOMEM;
 903
 904         oparms.tcon = tcon;
 905         oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
 906         oparms.disposition = FILE_OPEN;
 907         oparms.create_options = 0;
 908         oparms.fid = fid;
 909         oparms.reconnect = false;
 910
 911         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
 912         kfree(utf16_path);
 913         if (rc) {
 914                 cifs_dbg(FYI, "open dir failed rc=%d\n", rc);
 915                 return rc;
 916         }
 917
 918         srch_inf->entries_in_buffer = 0;
 919         srch_inf->index_of_last_entry = 2;
 920
 921         rc = SMB2_query_directory(xid, tcon, fid->persistent_fid,
 922                                   fid->volatile_fid, 0, srch_inf);
 923         if (rc) {
 924                 cifs_dbg(FYI, "query directory failed rc=%d\n", rc);
 925                 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 926         }
 927         return rc;
 928 }
 929
 930 static int
 931 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
 932                     struct cifs_fid *fid, __u16 search_flags,
 933                     struct cifs_search_info *srch_inf)
 934 {
 935         return SMB2_query_directory(xid, tcon, fid->persistent_fid,
 936                                     fid->volatile_fid, 0, srch_inf);
 937 }
 938
 939 static int
 940 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
 941                struct cifs_fid *fid)
 942 {
 943         return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 944 }
 945
 946 /*
 947 * If we negotiate SMB2 protocol and get STATUS_PENDING - update
 948 * the number of credits and return true. Otherwise - return false.
 949 */
 950 static bool
 951 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server, int length)
 952 {
 953         struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
 954
 955         if (hdr->Status != STATUS_PENDING)
 956                 return false;
 957
 958         if (!length) {
 959                 spin_lock(&server->req_lock);
 960                 server->credits += le16_to_cpu(hdr->CreditRequest);
 961                 spin_unlock(&server->req_lock);
 962                 wake_up(&server->request_q);
 963         }
 964
 965         return true;
 966 }
 967
 968 static bool
 969 smb2_is_session_expired(char *buf)
 970 {
 971         struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
 972
 973         if (hdr->Status != STATUS_NETWORK_SESSION_EXPIRED)
 974                 return false;
 975
 976         cifs_dbg(FYI, "Session expired\n");
 977         return true;
 978 }
 979
 980 static int
 981 smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
 982                      struct cifsInodeInfo *cinode)
 983 {
 984         if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
 985                 return SMB2_lease_break(0, tcon, cinode->lease_key,
 986                                         smb2_get_lease_state(cinode));
 987
 988         return SMB2_oplock_break(0, tcon, fid->persistent_fid,
 989                                  fid->volatile_fid,
 990                                  CIFS_CACHE_READ(cinode) ? 1 : 0);
 991 }
 992
 993 static int
 994 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
 995              struct kstatfs *buf)
 996 {
 997         int rc;
 998         __le16 srch_path = 0; /* Null - open root of share */
 999         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1000         struct cifs_open_parms oparms;
1001         struct cifs_fid fid;
1002
1003         oparms.tcon = tcon;
1004         oparms.desired_access = FILE_READ_ATTRIBUTES;
1005         oparms.disposition = FILE_OPEN;
1006         oparms.create_options = 0;
1007         oparms.fid = &fid;
1008         oparms.reconnect = false;
1009
1010         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
1011         if (rc)
1012                 return rc;
1013         buf->f_type = SMB2_MAGIC_NUMBER;
1014         rc = SMB2_QFS_info(xid, tcon, fid.persistent_fid, fid.volatile_fid,
1015                            buf);
1016         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
1017         return rc;
1018 }
1019
1020 static bool
1021 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
1022 {
1023         return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
1024                ob1->fid.volatile_fid == ob2->fid.volatile_fid;
1025 }
1026
1027 static int
1028 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
1029                __u64 length, __u32 type, int lock, int unlock, bool wait)
1030 {
1031         if (unlock && !lock)
1032                 type = SMB2_LOCKFLAG_UNLOCK;
1033         return SMB2_lock(xid, tlink_tcon(cfile->tlink),
1034                          cfile->fid.persistent_fid, cfile->fid.volatile_fid,
1035                          current->tgid, length, offset, type, wait);
1036 }
1037
1038 static void
1039 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
1040 {
1041         memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
1042 }
1043
1044 static void
1045 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
1046 {
1047         memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
1048 }
1049
1050 static void
1051 smb2_new_lease_key(struct cifs_fid *fid)
1052 {
1053         generate_random_uuid(fid->lease_key);
1054 }
1055
1056 #define SMB2_SYMLINK_STRUCT_SIZE \
1057         (sizeof(struct smb2_err_rsp) - 1 + sizeof(struct smb2_symlink_err_rsp))
1058
1059 static int
1060 smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
1061                    const char *full_path, char **target_path,
1062                    struct cifs_sb_info *cifs_sb)
1063 {
1064         int rc;
1065         __le16 *utf16_path;
1066         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1067         struct cifs_open_parms oparms;
1068         struct cifs_fid fid;
1069         struct smb2_err_rsp *err_buf = NULL;
1070         struct smb2_symlink_err_rsp *symlink;
1071         unsigned int sub_len;
1072         unsigned int sub_offset;
1073         unsigned int print_len;
1074         unsigned int print_offset;
1075
1076         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
1077
1078         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
1079         if (!utf16_path)
1080                 return -ENOMEM;
1081
1082         oparms.tcon = tcon;
1083         oparms.desired_access = FILE_READ_ATTRIBUTES;
1084         oparms.disposition = FILE_OPEN;
1085         oparms.create_options = 0;
1086         oparms.fid = &fid;
1087         oparms.reconnect = false;
1088
1089         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, &err_buf);
1090
1091         if (!rc || !err_buf) {
1092                 kfree(utf16_path);
1093                 return -ENOENT;
1094         }
1095
1096         if (le32_to_cpu(err_buf->ByteCount) < sizeof(struct smb2_symlink_err_rsp) ||
1097             get_rfc1002_length(err_buf) + 4 < SMB2_SYMLINK_STRUCT_SIZE) {
1098                 kfree(utf16_path);
1099                 return -ENOENT;
1100         }
1101
1102         /* open must fail on symlink - reset rc */
1103         rc = 0;
1104         symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData;
1105         sub_len = le16_to_cpu(symlink->SubstituteNameLength);
1106         sub_offset = le16_to_cpu(symlink->SubstituteNameOffset);
1107         print_len = le16_to_cpu(symlink->PrintNameLength);
1108         print_offset = le16_to_cpu(symlink->PrintNameOffset);
1109
1110         if (get_rfc1002_length(err_buf) + 4 <
1111                         SMB2_SYMLINK_STRUCT_SIZE + sub_offset + sub_len) {
1112                 kfree(utf16_path);
1113                 return -ENOENT;
1114         }
1115
1116         if (get_rfc1002_length(err_buf) + 4 <
1117                         SMB2_SYMLINK_STRUCT_SIZE + print_offset + print_len) {
1118                 kfree(utf16_path);
1119                 return -ENOENT;
1120         }
1121
1122         *target_path = cifs_strndup_from_utf16(
1123                                 (char *)symlink->PathBuffer + sub_offset,
1124                                 sub_len, true, cifs_sb->local_nls);
1125         if (!(*target_path)) {
1126                 kfree(utf16_path);
1127                 return -ENOMEM;
1128         }
1129         convert_delimiter(*target_path, '/');
1130         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
1131         kfree(utf16_path);
1132         return rc;
1133 }
1134
1135 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
1136                             loff_t offset, loff_t len, bool keep_size)
1137 {
1138         struct inode *inode;
1139         struct cifsInodeInfo *cifsi;
1140         struct cifsFileInfo *cfile = file->private_data;
1141         struct file_zero_data_information fsctl_buf;
1142         long rc;
1143         unsigned int xid;
1144
1145         xid = get_xid();
1146
1147         inode = d_inode(cfile->dentry);
1148         cifsi = CIFS_I(inode);
1149
1150         /*
1151          * We zero the range through ioctl, so we need remove the page caches
1152          * first, otherwise the data may be inconsistent with the server.
1153          */
1154         truncate_pagecache_range(inode, offset, offset + len - 1);
1155
1156         /* if file not oplocked can't be sure whether asking to extend size */
1157         if (!CIFS_CACHE_READ(cifsi))
1158                 if (keep_size == false)
1159                         return -EOPNOTSUPP;
1160
1161         /*
1162          * Must check if file sparse since fallocate -z (zero range) assumes
1163          * non-sparse allocation
1164          */
1165         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE))
1166                 return -EOPNOTSUPP;
1167
1168         /*
1169          * need to make sure we are not asked to extend the file since the SMB3
1170          * fsctl does not change the file size. In the future we could change
1171          * this to zero the first part of the range then set the file size
1172          * which for a non sparse file would zero the newly extended range
1173          */
1174         if (keep_size == false)
1175                 if (i_size_read(inode) < offset + len)
1176                         return -EOPNOTSUPP;
1177
1178         cifs_dbg(FYI, "offset %lld len %lld", offset, len);
1179
1180         fsctl_buf.FileOffset = cpu_to_le64(offset);
1181         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
1182
1183         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1184                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
1185                         true /* is_fctl */, (char *)&fsctl_buf,
1186                         sizeof(struct file_zero_data_information), NULL, NULL);
1187         free_xid(xid);
1188         return rc;
1189 }
1190
1191 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
1192                             loff_t offset, loff_t len)
1193 {
1194         struct inode *inode;
1195         struct cifsInodeInfo *cifsi;
1196         struct cifsFileInfo *cfile = file->private_data;
1197         struct file_zero_data_information fsctl_buf;
1198         long rc;
1199         unsigned int xid;
1200         __u8 set_sparse = 1;
1201
1202         xid = get_xid();
1203
1204         inode = d_inode(cfile->dentry);
1205         cifsi = CIFS_I(inode);
1206
1207         /* Need to make file sparse, if not already, before freeing range. */
1208         /* Consider adding equivalent for compressed since it could also work */
1209         if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse))
1210                 return -EOPNOTSUPP;
1211
1212         /*
1213          * We implement the punch hole through ioctl, so we need remove the page
1214          * caches first, otherwise the data may be inconsistent with the server.
1215          */
1216         truncate_pagecache_range(inode, offset, offset + len - 1);
1217
1218         cifs_dbg(FYI, "offset %lld len %lld", offset, len);
1219
1220         fsctl_buf.FileOffset = cpu_to_le64(offset);
1221         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
1222
1223         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1224                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
1225                         true /* is_fctl */, (char *)&fsctl_buf,
1226                         sizeof(struct file_zero_data_information), NULL, NULL);
1227         free_xid(xid);
1228         return rc;
1229 }
1230
1231 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
1232                             loff_t off, loff_t len, bool keep_size)
1233 {
1234         struct inode *inode;
1235         struct cifsInodeInfo *cifsi;
1236         struct cifsFileInfo *cfile = file->private_data;
1237         long rc = -EOPNOTSUPP;
1238         unsigned int xid;
1239
1240         xid = get_xid();
1241
1242         inode = d_inode(cfile->dentry);
1243         cifsi = CIFS_I(inode);
1244
1245         /* if file not oplocked can't be sure whether asking to extend size */
1246         if (!CIFS_CACHE_READ(cifsi))
1247                 if (keep_size == false)
1248                         return -EOPNOTSUPP;
1249
1250         /*
1251          * Files are non-sparse by default so falloc may be a no-op
1252          * Must check if file sparse. If not sparse, and not extending
1253          * then no need to do anything since file already allocated
1254          */
1255         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
1256                 if (keep_size == true)
1257                         return 0;
1258                 /* check if extending file */
1259                 else if (i_size_read(inode) >= off + len)
1260                         /* not extending file and already not sparse */
1261                         return 0;
1262                 /* BB: in future add else clause to extend file */
1263                 else
1264                         return -EOPNOTSUPP;
1265         }
1266
1267         if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
1268                 /*
1269                  * Check if falloc starts within first few pages of file
1270                  * and ends within a few pages of the end of file to
1271                  * ensure that most of file is being forced to be
1272                  * fallocated now. If so then setting whole file sparse
1273                  * ie potentially making a few extra pages at the beginning
1274                  * or end of the file non-sparse via set_sparse is harmless.
1275                  */
1276                 if ((off > 8192) || (off + len + 8192 < i_size_read(inode)))
1277                         return -EOPNOTSUPP;
1278
1279                 rc = smb2_set_sparse(xid, tcon, cfile, inode, false);
1280         }
1281         /* BB: else ... in future add code to extend file and set sparse */
1282
1283
1284         free_xid(xid);
1285         return rc;
1286 }
1287
1288
1289 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
1290                            loff_t off, loff_t len)
1291 {
1292         /* KEEP_SIZE already checked for by do_fallocate */
1293         if (mode & FALLOC_FL_PUNCH_HOLE)
1294                 return smb3_punch_hole(file, tcon, off, len);
1295         else if (mode & FALLOC_FL_ZERO_RANGE) {
1296                 if (mode & FALLOC_FL_KEEP_SIZE)
1297                         return smb3_zero_range(file, tcon, off, len, true);
1298                 return smb3_zero_range(file, tcon, off, len, false);
1299         } else if (mode == FALLOC_FL_KEEP_SIZE)
1300                 return smb3_simple_falloc(file, tcon, off, len, true);
1301         else if (mode == 0)
1302                 return smb3_simple_falloc(file, tcon, off, len, false);
1303
1304         return -EOPNOTSUPP;
1305 }
1306
1307 static void
1308 smb2_downgrade_oplock(struct TCP_Server_Info *server,
1309                         struct cifsInodeInfo *cinode, bool set_level2)
1310 {
1311         if (set_level2)
1312                 server->ops->set_oplock_level(cinode, SMB2_OPLOCK_LEVEL_II,
1313                                                 0, NULL);
1314         else
1315                 server->ops->set_oplock_level(cinode, 0, 0, NULL);
1316 }
1317
1318 static void
1319 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1320                       unsigned int epoch, bool *purge_cache)
1321 {
1322         oplock &= 0xFF;
1323         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
1324                 return;
1325         if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
1326                 cinode->oplock = CIFS_CACHE_RHW_FLG;
1327                 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
1328                          &cinode->vfs_inode);
1329         } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
1330                 cinode->oplock = CIFS_CACHE_RW_FLG;
1331                 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
1332                          &cinode->vfs_inode);
1333         } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
1334                 cinode->oplock = CIFS_CACHE_READ_FLG;
1335                 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
1336                          &cinode->vfs_inode);
1337         } else
1338                 cinode->oplock = 0;
1339 }
1340
1341 static void
1342 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1343                        unsigned int epoch, bool *purge_cache)
1344 {
1345         char message[5] = {0};
1346         unsigned int new_oplock = 0;
1347
1348         oplock &= 0xFF;
1349         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
1350                 return;
1351
1352         /* Check if the server granted an oplock rather than a lease */
1353         if (oplock & SMB2_OPLOCK_LEVEL_EXCLUSIVE)
1354                 return smb2_set_oplock_level(cinode, oplock, epoch,
1355                                              purge_cache);
1356
1357         if (oplock & SMB2_LEASE_READ_CACHING_HE) {
1358                 new_oplock |= CIFS_CACHE_READ_FLG;
1359                 strcat(message, "R");
1360         }
1361         if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
1362                 new_oplock |= CIFS_CACHE_HANDLE_FLG;
1363                 strcat(message, "H");
1364         }
1365         if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
1366                 new_oplock |= CIFS_CACHE_WRITE_FLG;
1367                 strcat(message, "W");
1368         }
1369         if (!new_oplock)
1370                 strncpy(message, "None", sizeof(message));
1371
1372         cinode->oplock = new_oplock;
1373         cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
1374                  &cinode->vfs_inode);
1375 }
1376
1377 static void
1378 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1379                       unsigned int epoch, bool *purge_cache)
1380 {
1381         unsigned int old_oplock = cinode->oplock;
1382
1383         smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
1384
1385         if (purge_cache) {
1386                 *purge_cache = false;
1387                 if (old_oplock == CIFS_CACHE_READ_FLG) {
1388                         if (cinode->oplock == CIFS_CACHE_READ_FLG &&
1389                             (epoch - cinode->epoch > 0))
1390                                 *purge_cache = true;
1391                         else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
1392                                  (epoch - cinode->epoch > 1))
1393                                 *purge_cache = true;
1394                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
1395                                  (epoch - cinode->epoch > 1))
1396                                 *purge_cache = true;
1397                         else if (cinode->oplock == 0 &&
1398                                  (epoch - cinode->epoch > 0))
1399                                 *purge_cache = true;
1400                 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
1401                         if (cinode->oplock == CIFS_CACHE_RH_FLG &&
1402                             (epoch - cinode->epoch > 0))
1403                                 *purge_cache = true;
1404                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
1405                                  (epoch - cinode->epoch > 1))
1406                                 *purge_cache = true;
1407                 }
1408                 cinode->epoch = epoch;
1409         }
1410 }
1411
1412 static bool
1413 smb2_is_read_op(__u32 oplock)
1414 {
1415         return oplock == SMB2_OPLOCK_LEVEL_II;
1416 }
1417
1418 static bool
1419 smb21_is_read_op(__u32 oplock)
1420 {
1421         return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
1422                !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
1423 }
1424
1425 static __le32
1426 map_oplock_to_lease(u8 oplock)
1427 {
1428         if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
1429                 return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING;
1430         else if (oplock == SMB2_OPLOCK_LEVEL_II)
1431                 return SMB2_LEASE_READ_CACHING;
1432         else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
1433                 return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING |
1434                        SMB2_LEASE_WRITE_CACHING;
1435         return 0;
1436 }
1437
1438 static char *
1439 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
1440 {
1441         struct create_lease *buf;
1442
1443         buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
1444         if (!buf)
1445                 return NULL;
1446
1447         buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
1448         buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
1449         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
1450
1451         buf->ccontext.DataOffset = cpu_to_le16(offsetof
1452                                         (struct create_lease, lcontext));
1453         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
1454         buf->ccontext.NameOffset = cpu_to_le16(offsetof
1455                                 (struct create_lease, Name));
1456         buf->ccontext.NameLength = cpu_to_le16(4);
1457         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
1458         buf->Name[0] = 'R';
1459         buf->Name[1] = 'q';
1460         buf->Name[2] = 'L';
1461         buf->Name[3] = 's';
1462         return (char *)buf;
1463 }
1464
1465 static char *
1466 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
1467 {
1468         struct create_lease_v2 *buf;
1469
1470         buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
1471         if (!buf)
1472                 return NULL;
1473
1474         buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
1475         buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
1476         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
1477
1478         buf->ccontext.DataOffset = cpu_to_le16(offsetof
1479                                         (struct create_lease_v2, lcontext));
1480         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
1481         buf->ccontext.NameOffset = cpu_to_le16(offsetof
1482                                 (struct create_lease_v2, Name));
1483         buf->ccontext.NameLength = cpu_to_le16(4);
1484         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
1485         buf->Name[0] = 'R';
1486         buf->Name[1] = 'q';
1487         buf->Name[2] = 'L';
1488         buf->Name[3] = 's';
1489         return (char *)buf;
1490 }
1491
1492 static __u8
1493 smb2_parse_lease_buf(void *buf, unsigned int *epoch)
1494 {
1495         struct create_lease *lc = (struct create_lease *)buf;
1496
1497         *epoch = 0; /* not used */
1498         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
1499                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
1500         return le32_to_cpu(lc->lcontext.LeaseState);
1501 }
1502
1503 static __u8
1504 smb3_parse_lease_buf(void *buf, unsigned int *epoch)
1505 {
1506         struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
1507
1508         *epoch = le16_to_cpu(lc->lcontext.Epoch);
1509         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
1510                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
1511         return le32_to_cpu(lc->lcontext.LeaseState);
1512 }
1513
1514 static unsigned int
1515 smb2_wp_retry_size(struct inode *inode)
1516 {
1517         return min_t(unsigned int, CIFS_SB(inode->i_sb)->wsize,
1518                      SMB2_MAX_BUFFER_SIZE);
1519 }
1520
1521 static bool
1522 smb2_dir_needs_close(struct cifsFileInfo *cfile)
1523 {
1524         return !cfile->invalidHandle;
1525 }
1526
1527 struct smb_version_operations smb20_operations = {
1528         .compare_fids = smb2_compare_fids,
1529         .setup_request = smb2_setup_request,
1530         .setup_async_request = smb2_setup_async_request,
1531         .check_receive = smb2_check_receive,
1532         .add_credits = smb2_add_credits,
1533         .set_credits = smb2_set_credits,
1534         .get_credits_field = smb2_get_credits_field,
1535         .get_credits = smb2_get_credits,
1536         .wait_mtu_credits = cifs_wait_mtu_credits,
1537         .get_next_mid = smb2_get_next_mid,
1538         .read_data_offset = smb2_read_data_offset,
1539         .read_data_length = smb2_read_data_length,
1540         .map_error = map_smb2_to_linux_error,
1541         .find_mid = smb2_find_mid,
1542         .check_message = smb2_check_message,
1543         .dump_detail = smb2_dump_detail,
1544         .clear_stats = smb2_clear_stats,
1545         .print_stats = smb2_print_stats,
1546         .is_oplock_break = smb2_is_valid_oplock_break,
1547         .handle_cancelled_mid = smb2_handle_cancelled_mid,
1548         .downgrade_oplock = smb2_downgrade_oplock,
1549         .need_neg = smb2_need_neg,
1550         .negotiate = smb2_negotiate,
1551         .negotiate_wsize = smb2_negotiate_wsize,
1552         .negotiate_rsize = smb2_negotiate_rsize,
1553         .sess_setup = SMB2_sess_setup,
1554         .logoff = SMB2_logoff,
1555         .tree_connect = SMB2_tcon,
1556         .tree_disconnect = SMB2_tdis,
1557         .qfs_tcon = smb2_qfs_tcon,
1558         .is_path_accessible = smb2_is_path_accessible,
1559         .can_echo = smb2_can_echo,
1560         .echo = SMB2_echo,
1561         .query_path_info = smb2_query_path_info,
1562         .get_srv_inum = smb2_get_srv_inum,
1563         .query_file_info = smb2_query_file_info,
1564         .set_path_size = smb2_set_path_size,
1565         .set_file_size = smb2_set_file_size,
1566         .set_file_info = smb2_set_file_info,
1567         .set_compression = smb2_set_compression,
1568         .mkdir = smb2_mkdir,
1569         .mkdir_setinfo = smb2_mkdir_setinfo,
1570         .rmdir = smb2_rmdir,
1571         .unlink = smb2_unlink,
1572         .rename = smb2_rename_path,
1573         .create_hardlink = smb2_create_hardlink,
1574         .query_symlink = smb2_query_symlink,
1575         .open = smb2_open_file,
1576         .set_fid = smb2_set_fid,
1577         .close = smb2_close_file,
1578         .flush = smb2_flush_file,
1579         .async_readv = smb2_async_readv,
1580         .async_writev = smb2_async_writev,
1581         .sync_read = smb2_sync_read,
1582         .sync_write = smb2_sync_write,
1583         .query_dir_first = smb2_query_dir_first,
1584         .query_dir_next = smb2_query_dir_next,
1585         .close_dir = smb2_close_dir,
1586         .calc_smb_size = smb2_calc_size,
1587         .is_status_pending = smb2_is_status_pending,
1588         .is_session_expired = smb2_is_session_expired,
1589         .oplock_response = smb2_oplock_response,
1590         .queryfs = smb2_queryfs,
1591         .mand_lock = smb2_mand_lock,
1592         .mand_unlock_range = smb2_unlock_range,
1593         .push_mand_locks = smb2_push_mandatory_locks,
1594         .get_lease_key = smb2_get_lease_key,
1595         .set_lease_key = smb2_set_lease_key,
1596         .new_lease_key = smb2_new_lease_key,
1597         .calc_signature = smb2_calc_signature,
1598         .is_read_op = smb2_is_read_op,
1599         .set_oplock_level = smb2_set_oplock_level,
1600         .create_lease_buf = smb2_create_lease_buf,
1601         .parse_lease_buf = smb2_parse_lease_buf,
1602         .clone_range = smb2_clone_range,
1603         .wp_retry_size = smb2_wp_retry_size,
1604         .dir_needs_close = smb2_dir_needs_close,
1605 };
1606
1607 struct smb_version_operations smb21_operations = {
1608         .compare_fids = smb2_compare_fids,
1609         .setup_request = smb2_setup_request,
1610         .setup_async_request = smb2_setup_async_request,
1611         .check_receive = smb2_check_receive,
1612         .add_credits = smb2_add_credits,
1613         .set_credits = smb2_set_credits,
1614         .get_credits_field = smb2_get_credits_field,
1615         .get_credits = smb2_get_credits,
1616         .wait_mtu_credits = smb2_wait_mtu_credits,
1617         .get_next_mid = smb2_get_next_mid,
1618         .read_data_offset = smb2_read_data_offset,
1619         .read_data_length = smb2_read_data_length,
1620         .map_error = map_smb2_to_linux_error,
1621         .find_mid = smb2_find_mid,
1622         .check_message = smb2_check_message,
1623         .dump_detail = smb2_dump_detail,
1624         .clear_stats = smb2_clear_stats,
1625         .print_stats = smb2_print_stats,
1626         .is_oplock_break = smb2_is_valid_oplock_break,
1627         .handle_cancelled_mid = smb2_handle_cancelled_mid,
1628         .downgrade_oplock = smb2_downgrade_oplock,
1629         .need_neg = smb2_need_neg,
1630         .negotiate = smb2_negotiate,
1631         .negotiate_wsize = smb2_negotiate_wsize,
1632         .negotiate_rsize = smb2_negotiate_rsize,
1633         .sess_setup = SMB2_sess_setup,
1634         .logoff = SMB2_logoff,
1635         .tree_connect = SMB2_tcon,
1636         .tree_disconnect = SMB2_tdis,
1637         .qfs_tcon = smb2_qfs_tcon,
1638         .is_path_accessible = smb2_is_path_accessible,
1639         .can_echo = smb2_can_echo,
1640         .echo = SMB2_echo,
1641         .query_path_info = smb2_query_path_info,
1642         .get_srv_inum = smb2_get_srv_inum,
1643         .query_file_info = smb2_query_file_info,
1644         .set_path_size = smb2_set_path_size,
1645         .set_file_size = smb2_set_file_size,
1646         .set_file_info = smb2_set_file_info,
1647         .set_compression = smb2_set_compression,
1648         .mkdir = smb2_mkdir,
1649         .mkdir_setinfo = smb2_mkdir_setinfo,
1650         .rmdir = smb2_rmdir,
1651         .unlink = smb2_unlink,
1652         .rename = smb2_rename_path,
1653         .create_hardlink = smb2_create_hardlink,
1654         .query_symlink = smb2_query_symlink,
1655         .query_mf_symlink = smb3_query_mf_symlink,
1656         .create_mf_symlink = smb3_create_mf_symlink,
1657         .open = smb2_open_file,
1658         .set_fid = smb2_set_fid,
1659         .close = smb2_close_file,
1660         .flush = smb2_flush_file,
1661         .async_readv = smb2_async_readv,
1662         .async_writev = smb2_async_writev,
1663         .sync_read = smb2_sync_read,
1664         .sync_write = smb2_sync_write,
1665         .query_dir_first = smb2_query_dir_first,
1666         .query_dir_next = smb2_query_dir_next,
1667         .close_dir = smb2_close_dir,
1668         .calc_smb_size = smb2_calc_size,
1669         .is_status_pending = smb2_is_status_pending,
1670         .is_session_expired = smb2_is_session_expired,
1671         .oplock_response = smb2_oplock_response,
1672         .queryfs = smb2_queryfs,
1673         .mand_lock = smb2_mand_lock,
1674         .mand_unlock_range = smb2_unlock_range,
1675         .push_mand_locks = smb2_push_mandatory_locks,
1676         .get_lease_key = smb2_get_lease_key,
1677         .set_lease_key = smb2_set_lease_key,
1678         .new_lease_key = smb2_new_lease_key,
1679         .calc_signature = smb2_calc_signature,
1680         .is_read_op = smb21_is_read_op,
1681         .set_oplock_level = smb21_set_oplock_level,
1682         .create_lease_buf = smb2_create_lease_buf,
1683         .parse_lease_buf = smb2_parse_lease_buf,
1684         .clone_range = smb2_clone_range,
1685         .wp_retry_size = smb2_wp_retry_size,
1686         .dir_needs_close = smb2_dir_needs_close,
1687 };
1688
1689 struct smb_version_operations smb30_operations = {
1690         .compare_fids = smb2_compare_fids,
1691         .setup_request = smb2_setup_request,
1692         .setup_async_request = smb2_setup_async_request,
1693         .check_receive = smb2_check_receive,
1694         .add_credits = smb2_add_credits,
1695         .set_credits = smb2_set_credits,
1696         .get_credits_field = smb2_get_credits_field,
1697         .get_credits = smb2_get_credits,
1698         .wait_mtu_credits = smb2_wait_mtu_credits,
1699         .get_next_mid = smb2_get_next_mid,
1700         .read_data_offset = smb2_read_data_offset,
1701         .read_data_length = smb2_read_data_length,
1702         .map_error = map_smb2_to_linux_error,
1703         .find_mid = smb2_find_mid,
1704         .check_message = smb2_check_message,
1705         .dump_detail = smb2_dump_detail,
1706         .clear_stats = smb2_clear_stats,
1707         .print_stats = smb2_print_stats,
1708         .dump_share_caps = smb2_dump_share_caps,
1709         .is_oplock_break = smb2_is_valid_oplock_break,
1710         .handle_cancelled_mid = smb2_handle_cancelled_mid,
1711         .downgrade_oplock = smb2_downgrade_oplock,
1712         .need_neg = smb2_need_neg,
1713         .negotiate = smb2_negotiate,
1714         .negotiate_wsize = smb2_negotiate_wsize,
1715         .negotiate_rsize = smb2_negotiate_rsize,
1716         .sess_setup = SMB2_sess_setup,
1717         .logoff = SMB2_logoff,
1718         .tree_connect = SMB2_tcon,
1719         .tree_disconnect = SMB2_tdis,
1720         .qfs_tcon = smb3_qfs_tcon,
1721         .is_path_accessible = smb2_is_path_accessible,
1722         .can_echo = smb2_can_echo,
1723         .echo = SMB2_echo,
1724         .query_path_info = smb2_query_path_info,
1725         .get_srv_inum = smb2_get_srv_inum,
1726         .query_file_info = smb2_query_file_info,
1727         .set_path_size = smb2_set_path_size,
1728         .set_file_size = smb2_set_file_size,
1729         .set_file_info = smb2_set_file_info,
1730         .set_compression = smb2_set_compression,
1731         .mkdir = smb2_mkdir,
1732         .mkdir_setinfo = smb2_mkdir_setinfo,
1733         .rmdir = smb2_rmdir,
1734         .unlink = smb2_unlink,
1735         .rename = smb2_rename_path,
1736         .create_hardlink = smb2_create_hardlink,
1737         .query_symlink = smb2_query_symlink,
1738         .query_mf_symlink = smb3_query_mf_symlink,
1739         .create_mf_symlink = smb3_create_mf_symlink,
1740         .open = smb2_open_file,
1741         .set_fid = smb2_set_fid,
1742         .close = smb2_close_file,
1743         .flush = smb2_flush_file,
1744         .async_readv = smb2_async_readv,
1745         .async_writev = smb2_async_writev,
1746         .sync_read = smb2_sync_read,
1747         .sync_write = smb2_sync_write,
1748         .query_dir_first = smb2_query_dir_first,
1749         .query_dir_next = smb2_query_dir_next,
1750         .close_dir = smb2_close_dir,
1751         .calc_smb_size = smb2_calc_size,
1752         .is_status_pending = smb2_is_status_pending,
1753         .is_session_expired = smb2_is_session_expired,
1754         .oplock_response = smb2_oplock_response,
1755         .queryfs = smb2_queryfs,
1756         .mand_lock = smb2_mand_lock,
1757         .mand_unlock_range = smb2_unlock_range,
1758         .push_mand_locks = smb2_push_mandatory_locks,
1759         .get_lease_key = smb2_get_lease_key,
1760         .set_lease_key = smb2_set_lease_key,
1761         .new_lease_key = smb2_new_lease_key,
1762         .generate_signingkey = generate_smb3signingkey,
1763         .calc_signature = smb3_calc_signature,
1764         .set_integrity  = smb3_set_integrity,
1765         .is_read_op = smb21_is_read_op,
1766         .set_oplock_level = smb3_set_oplock_level,
1767         .create_lease_buf = smb3_create_lease_buf,
1768         .parse_lease_buf = smb3_parse_lease_buf,
1769         .clone_range = smb2_clone_range,
1770         .duplicate_extents = smb2_duplicate_extents,
1771         .validate_negotiate = smb3_validate_negotiate,
1772         .wp_retry_size = smb2_wp_retry_size,
1773         .dir_needs_close = smb2_dir_needs_close,
1774         .fallocate = smb3_fallocate,
1775 };
1776
1777 #ifdef CONFIG_CIFS_SMB311
1778 struct smb_version_operations smb311_operations = {
1779         .compare_fids = smb2_compare_fids,
1780         .setup_request = smb2_setup_request,
1781         .setup_async_request = smb2_setup_async_request,
1782         .check_receive = smb2_check_receive,
1783         .add_credits = smb2_add_credits,
1784         .set_credits = smb2_set_credits,
1785         .get_credits_field = smb2_get_credits_field,
1786         .get_credits = smb2_get_credits,
1787         .wait_mtu_credits = smb2_wait_mtu_credits,
1788         .get_next_mid = smb2_get_next_mid,
1789         .read_data_offset = smb2_read_data_offset,
1790         .read_data_length = smb2_read_data_length,
1791         .map_error = map_smb2_to_linux_error,
1792         .find_mid = smb2_find_mid,
1793         .check_message = smb2_check_message,
1794         .dump_detail = smb2_dump_detail,
1795         .clear_stats = smb2_clear_stats,
1796         .print_stats = smb2_print_stats,
1797         .dump_share_caps = smb2_dump_share_caps,
1798         .is_oplock_break = smb2_is_valid_oplock_break,
1799         .handle_cancelled_mid = smb2_handle_cancelled_mid,
1800         .downgrade_oplock = smb2_downgrade_oplock,
1801         .need_neg = smb2_need_neg,
1802         .negotiate = smb2_negotiate,
1803         .negotiate_wsize = smb2_negotiate_wsize,
1804         .negotiate_rsize = smb2_negotiate_rsize,
1805         .sess_setup = SMB2_sess_setup,
1806         .logoff = SMB2_logoff,
1807         .tree_connect = SMB2_tcon,
1808         .tree_disconnect = SMB2_tdis,
1809         .qfs_tcon = smb3_qfs_tcon,
1810         .is_path_accessible = smb2_is_path_accessible,
1811         .can_echo = smb2_can_echo,
1812         .echo = SMB2_echo,
1813         .query_path_info = smb2_query_path_info,
1814         .get_srv_inum = smb2_get_srv_inum,
1815         .query_file_info = smb2_query_file_info,
1816         .set_path_size = smb2_set_path_size,
1817         .set_file_size = smb2_set_file_size,
1818         .set_file_info = smb2_set_file_info,
1819         .set_compression = smb2_set_compression,
1820         .mkdir = smb2_mkdir,
1821         .mkdir_setinfo = smb2_mkdir_setinfo,
1822         .rmdir = smb2_rmdir,
1823         .unlink = smb2_unlink,
1824         .rename = smb2_rename_path,
1825         .create_hardlink = smb2_create_hardlink,
1826         .query_symlink = smb2_query_symlink,
1827         .query_mf_symlink = smb3_query_mf_symlink,
1828         .create_mf_symlink = smb3_create_mf_symlink,
1829         .open = smb2_open_file,
1830         .set_fid = smb2_set_fid,
1831         .close = smb2_close_file,
1832         .flush = smb2_flush_file,
1833         .async_readv = smb2_async_readv,
1834         .async_writev = smb2_async_writev,
1835         .sync_read = smb2_sync_read,
1836         .sync_write = smb2_sync_write,
1837         .query_dir_first = smb2_query_dir_first,
1838         .query_dir_next = smb2_query_dir_next,
1839         .close_dir = smb2_close_dir,
1840         .calc_smb_size = smb2_calc_size,
1841         .is_status_pending = smb2_is_status_pending,
1842         .is_session_expired = smb2_is_session_expired,
1843         .oplock_response = smb2_oplock_response,
1844         .queryfs = smb2_queryfs,
1845         .mand_lock = smb2_mand_lock,
1846         .mand_unlock_range = smb2_unlock_range,
1847         .push_mand_locks = smb2_push_mandatory_locks,
1848         .get_lease_key = smb2_get_lease_key,
1849         .set_lease_key = smb2_set_lease_key,
1850         .new_lease_key = smb2_new_lease_key,
1851         .generate_signingkey = generate_smb3signingkey,
1852         .calc_signature = smb3_calc_signature,
1853         .set_integrity  = smb3_set_integrity,
1854         .is_read_op = smb21_is_read_op,
1855         .set_oplock_level = smb3_set_oplock_level,
1856         .create_lease_buf = smb3_create_lease_buf,
1857         .parse_lease_buf = smb3_parse_lease_buf,
1858         .clone_range = smb2_clone_range,
1859         .duplicate_extents = smb2_duplicate_extents,
1860 /*      .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
1861         .wp_retry_size = smb2_wp_retry_size,
1862         .dir_needs_close = smb2_dir_needs_close,
1863         .fallocate = smb3_fallocate,
1864 };
1865 #endif /* CIFS_SMB311 */
1866
1867 struct smb_version_values smb20_values = {
1868         .version_string = SMB20_VERSION_STRING,
1869         .protocol_id = SMB20_PROT_ID,
1870         .req_capabilities = 0, /* MBZ */
1871         .large_lock_type = 0,
1872         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1873         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1874         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1875         .header_size = sizeof(struct smb2_hdr),
1876         .max_header_size = MAX_SMB2_HDR_SIZE,
1877         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1878         .lock_cmd = SMB2_LOCK,
1879         .cap_unix = 0,
1880         .cap_nt_find = SMB2_NT_FIND,
1881         .cap_large_files = SMB2_LARGE_FILES,
1882         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1883         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1884         .create_lease_size = sizeof(struct create_lease),
1885 };
1886
1887 struct smb_version_values smb21_values = {
1888         .version_string = SMB21_VERSION_STRING,
1889         .protocol_id = SMB21_PROT_ID,
1890         .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
1891         .large_lock_type = 0,
1892         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1893         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1894         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1895         .header_size = sizeof(struct smb2_hdr),
1896         .max_header_size = MAX_SMB2_HDR_SIZE,
1897         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1898         .lock_cmd = SMB2_LOCK,
1899         .cap_unix = 0,
1900         .cap_nt_find = SMB2_NT_FIND,
1901         .cap_large_files = SMB2_LARGE_FILES,
1902         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1903         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1904         .create_lease_size = sizeof(struct create_lease),
1905 };
1906
1907 struct smb_version_values smb30_values = {
1908         .version_string = SMB30_VERSION_STRING,
1909         .protocol_id = SMB30_PROT_ID,
1910         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES,
1911         .large_lock_type = 0,
1912         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1913         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1914         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1915         .header_size = sizeof(struct smb2_hdr),
1916         .max_header_size = MAX_SMB2_HDR_SIZE,
1917         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1918         .lock_cmd = SMB2_LOCK,
1919         .cap_unix = 0,
1920         .cap_nt_find = SMB2_NT_FIND,
1921         .cap_large_files = SMB2_LARGE_FILES,
1922         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1923         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1924         .create_lease_size = sizeof(struct create_lease_v2),
1925 };
1926
1927 struct smb_version_values smb302_values = {
1928         .version_string = SMB302_VERSION_STRING,
1929         .protocol_id = SMB302_PROT_ID,
1930         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES,
1931         .large_lock_type = 0,
1932         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1933         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1934         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1935         .header_size = sizeof(struct smb2_hdr),
1936         .max_header_size = MAX_SMB2_HDR_SIZE,
1937         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1938         .lock_cmd = SMB2_LOCK,
1939         .cap_unix = 0,
1940         .cap_nt_find = SMB2_NT_FIND,
1941         .cap_large_files = SMB2_LARGE_FILES,
1942         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1943         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1944         .create_lease_size = sizeof(struct create_lease_v2),
1945 };
1946
1947 #ifdef CONFIG_CIFS_SMB311
1948 struct smb_version_values smb311_values = {
1949         .version_string = SMB311_VERSION_STRING,
1950         .protocol_id = SMB311_PROT_ID,
1951         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES,
1952         .large_lock_type = 0,
1953         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1954         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1955         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1956         .header_size = sizeof(struct smb2_hdr),
1957         .max_header_size = MAX_SMB2_HDR_SIZE,
1958         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1959         .lock_cmd = SMB2_LOCK,
1960         .cap_unix = 0,
1961         .cap_nt_find = SMB2_NT_FIND,
1962         .cap_large_files = SMB2_LARGE_FILES,
1963         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1964         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1965         .create_lease_size = sizeof(struct create_lease_v2),
1966 };
1967 #endif /* SMB311 */