kernel/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 == 1) {
 147                                 *num = SMB2_MAX_BUFFER_SIZE;
 148                                 *credits = 0;
 149                                 break;
 150                         }
 151
 152                         /* leave one credit for a possible reopen */
 153                         scredits--;
 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
 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 }
 540
 541 static void
 542 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
 543                 struct cifs_fid *fid)
 544 {
 545         SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 546 }
 547
 548 static int
 549 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
 550                      u64 persistent_fid, u64 volatile_fid,
 551                      struct copychunk_ioctl *pcchunk)
 552 {
 553         int rc;
 554         unsigned int ret_data_len;
 555         struct resume_key_req *res_key;
 556
 557         rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
 558                         FSCTL_SRV_REQUEST_RESUME_KEY, true /* is_fsctl */,
 559                         NULL, 0 /* no input */,
 560                         (char **)&res_key, &ret_data_len);
 561
 562         if (rc) {
 563                 cifs_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
 564                 goto req_res_key_exit;
 565         }
 566         if (ret_data_len < sizeof(struct resume_key_req)) {
 567                 cifs_dbg(VFS, "Invalid refcopy resume key length\n");
 568                 rc = -EINVAL;
 569                 goto req_res_key_exit;
 570         }
 571         memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
 572
 573 req_res_key_exit:
 574         kfree(res_key);
 575         return rc;
 576 }
 577
 578 static int
 579 smb2_clone_range(const unsigned int xid,
 580                         struct cifsFileInfo *srcfile,
 581                         struct cifsFileInfo *trgtfile, u64 src_off,
 582                         u64 len, u64 dest_off)
 583 {
 584         int rc;
 585         unsigned int ret_data_len;
 586         struct copychunk_ioctl *pcchunk;
 587         struct copychunk_ioctl_rsp *retbuf = NULL;
 588         struct cifs_tcon *tcon;
 589         int chunks_copied = 0;
 590         bool chunk_sizes_updated = false;
 591
 592         pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
 593
 594         if (pcchunk == NULL)
 595                 return -ENOMEM;
 596
 597         cifs_dbg(FYI, "in smb2_clone_range - about to call request res key\n");
 598         /* Request a key from the server to identify the source of the copy */
 599         rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
 600                                 srcfile->fid.persistent_fid,
 601                                 srcfile->fid.volatile_fid, pcchunk);
 602
 603         /* Note: request_res_key sets res_key null only if rc !=0 */
 604         if (rc)
 605                 goto cchunk_out;
 606
 607         /* For now array only one chunk long, will make more flexible later */
 608         pcchunk->ChunkCount = cpu_to_le32(1);
 609         pcchunk->Reserved = 0;
 610         pcchunk->Reserved2 = 0;
 611
 612         tcon = tlink_tcon(trgtfile->tlink);
 613
 614         while (len > 0) {
 615                 pcchunk->SourceOffset = cpu_to_le64(src_off);
 616                 pcchunk->TargetOffset = cpu_to_le64(dest_off);
 617                 pcchunk->Length =
 618                         cpu_to_le32(min_t(u32, len, tcon->max_bytes_chunk));
 619
 620                 /* Request server copy to target from src identified by key */
 621                 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
 622                         trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
 623                         true /* is_fsctl */, (char *)pcchunk,
 624                         sizeof(struct copychunk_ioctl), (char **)&retbuf,
 625                         &ret_data_len);
 626                 if (rc == 0) {
 627                         if (ret_data_len !=
 628                                         sizeof(struct copychunk_ioctl_rsp)) {
 629                                 cifs_dbg(VFS, "invalid cchunk response size\n");
 630                                 rc = -EIO;
 631                                 goto cchunk_out;
 632                         }
 633                         if (retbuf->TotalBytesWritten == 0) {
 634                                 cifs_dbg(FYI, "no bytes copied\n");
 635                                 rc = -EIO;
 636                                 goto cchunk_out;
 637                         }
 638                         /*
 639                          * Check if server claimed to write more than we asked
 640                          */
 641                         if (le32_to_cpu(retbuf->TotalBytesWritten) >
 642                             le32_to_cpu(pcchunk->Length)) {
 643                                 cifs_dbg(VFS, "invalid copy chunk response\n");
 644                                 rc = -EIO;
 645                                 goto cchunk_out;
 646                         }
 647                         if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
 648                                 cifs_dbg(VFS, "invalid num chunks written\n");
 649                                 rc = -EIO;
 650                                 goto cchunk_out;
 651                         }
 652                         chunks_copied++;
 653
 654                         src_off += le32_to_cpu(retbuf->TotalBytesWritten);
 655                         dest_off += le32_to_cpu(retbuf->TotalBytesWritten);
 656                         len -= le32_to_cpu(retbuf->TotalBytesWritten);
 657
 658                         cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %d\n",
 659                                 le32_to_cpu(retbuf->ChunksWritten),
 660                                 le32_to_cpu(retbuf->ChunkBytesWritten),
 661                                 le32_to_cpu(retbuf->TotalBytesWritten));
 662                 } else if (rc == -EINVAL) {
 663                         if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
 664                                 goto cchunk_out;
 665
 666                         cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
 667                                 le32_to_cpu(retbuf->ChunksWritten),
 668                                 le32_to_cpu(retbuf->ChunkBytesWritten),
 669                                 le32_to_cpu(retbuf->TotalBytesWritten));
 670
 671                         /*
 672                          * Check if this is the first request using these sizes,
 673                          * (ie check if copy succeed once with original sizes
 674                          * and check if the server gave us different sizes after
 675                          * we already updated max sizes on previous request).
 676                          * if not then why is the server returning an error now
 677                          */
 678                         if ((chunks_copied != 0) || chunk_sizes_updated)
 679                                 goto cchunk_out;
 680
 681                         /* Check that server is not asking us to grow size */
 682                         if (le32_to_cpu(retbuf->ChunkBytesWritten) <
 683                                         tcon->max_bytes_chunk)
 684                                 tcon->max_bytes_chunk =
 685                                         le32_to_cpu(retbuf->ChunkBytesWritten);
 686                         else
 687                                 goto cchunk_out; /* server gave us bogus size */
 688
 689                         /* No need to change MaxChunks since already set to 1 */
 690                         chunk_sizes_updated = true;
 691                 } else
 692                         goto cchunk_out;
 693         }
 694
 695 cchunk_out:
 696         kfree(pcchunk);
 697         return rc;
 698 }
 699
 700 static int
 701 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
 702                 struct cifs_fid *fid)
 703 {
 704         return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 705 }
 706
 707 static unsigned int
 708 smb2_read_data_offset(char *buf)
 709 {
 710         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
 711         return rsp->DataOffset;
 712 }
 713
 714 static unsigned int
 715 smb2_read_data_length(char *buf)
 716 {
 717         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
 718         return le32_to_cpu(rsp->DataLength);
 719 }
 720
 721
 722 static int
 723 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
 724                struct cifs_io_parms *parms, unsigned int *bytes_read,
 725                char **buf, int *buf_type)
 726 {
 727         parms->persistent_fid = pfid->persistent_fid;
 728         parms->volatile_fid = pfid->volatile_fid;
 729         return SMB2_read(xid, parms, bytes_read, buf, buf_type);
 730 }
 731
 732 static int
 733 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
 734                 struct cifs_io_parms *parms, unsigned int *written,
 735                 struct kvec *iov, unsigned long nr_segs)
 736 {
 737
 738         parms->persistent_fid = pfid->persistent_fid;
 739         parms->volatile_fid = pfid->volatile_fid;
 740         return SMB2_write(xid, parms, written, iov, nr_segs);
 741 }
 742
 743 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
 744 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
 745                 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
 746 {
 747         struct cifsInodeInfo *cifsi;
 748         int rc;
 749
 750         cifsi = CIFS_I(inode);
 751
 752         /* if file already sparse don't bother setting sparse again */
 753         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
 754                 return true; /* already sparse */
 755
 756         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
 757                 return true; /* already not sparse */
 758
 759         /*
 760          * Can't check for sparse support on share the usual way via the
 761          * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
 762          * since Samba server doesn't set the flag on the share, yet
 763          * supports the set sparse FSCTL and returns sparse correctly
 764          * in the file attributes. If we fail setting sparse though we
 765          * mark that server does not support sparse files for this share
 766          * to avoid repeatedly sending the unsupported fsctl to server
 767          * if the file is repeatedly extended.
 768          */
 769         if (tcon->broken_sparse_sup)
 770                 return false;
 771
 772         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
 773                         cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
 774                         true /* is_fctl */, &setsparse, 1, NULL, NULL);
 775         if (rc) {
 776                 tcon->broken_sparse_sup = true;
 777                 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
 778                 return false;
 779         }
 780
 781         if (setsparse)
 782                 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
 783         else
 784                 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
 785
 786         return true;
 787 }
 788
 789 static int
 790 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
 791                    struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
 792 {
 793         __le64 eof = cpu_to_le64(size);
 794         struct inode *inode;
 795
 796         /*
 797          * If extending file more than one page make sparse. Many Linux fs
 798          * make files sparse by default when extending via ftruncate
 799          */
 800         inode = d_inode(cfile->dentry);
 801
 802         if (!set_alloc && (size > inode->i_size + 8192)) {
 803                 __u8 set_sparse = 1;
 804
 805                 /* whether set sparse succeeds or not, extend the file */
 806                 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
 807         }
 808
 809         return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
 810                             cfile->fid.volatile_fid, cfile->pid, &eof, false);
 811 }
 812
 813 static int
 814 smb2_duplicate_extents(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         char *retbuf = NULL;
 822         struct duplicate_extents_to_file dup_ext_buf;
 823         struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
 824
 825         /* server fileays advertise duplicate extent support with this flag */
 826         if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
 827              FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
 828                 return -EOPNOTSUPP;
 829
 830         dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
 831         dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
 832         dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
 833         dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
 834         dup_ext_buf.ByteCount = cpu_to_le64(len);
 835         cifs_dbg(FYI, "duplicate extents: src off %lld dst off %lld len %lld",
 836                 src_off, dest_off, len);
 837
 838         rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
 839         if (rc)
 840                 goto duplicate_extents_out;
 841
 842         rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
 843                         trgtfile->fid.volatile_fid,
 844                         FSCTL_DUPLICATE_EXTENTS_TO_FILE,
 845                         true /* is_fsctl */, (char *)&dup_ext_buf,
 846                         sizeof(struct duplicate_extents_to_file),
 847                         (char **)&retbuf,
 848                         &ret_data_len);
 849
 850         if (ret_data_len > 0)
 851                 cifs_dbg(FYI, "non-zero response length in duplicate extents");
 852
 853 duplicate_extents_out:
 854         return rc;
 855 }
 856
 857 static int
 858 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
 859                    struct cifsFileInfo *cfile)
 860 {
 861         return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
 862                             cfile->fid.volatile_fid);
 863 }
 864
 865 static int
 866 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
 867                    struct cifsFileInfo *cfile)
 868 {
 869         struct fsctl_set_integrity_information_req integr_info;
 870         char *retbuf = NULL;
 871         unsigned int ret_data_len;
 872
 873         integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
 874         integr_info.Flags = 0;
 875         integr_info.Reserved = 0;
 876
 877         return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
 878                         cfile->fid.volatile_fid,
 879                         FSCTL_SET_INTEGRITY_INFORMATION,
 880                         true /* is_fsctl */, (char *)&integr_info,
 881                         sizeof(struct fsctl_set_integrity_information_req),
 882                         (char **)&retbuf,
 883                         &ret_data_len);
 884
 885 }
 886
 887 static int
 888 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
 889                      const char *path, struct cifs_sb_info *cifs_sb,
 890                      struct cifs_fid *fid, __u16 search_flags,
 891                      struct cifs_search_info *srch_inf)
 892 {
 893         __le16 *utf16_path;
 894         int rc;
 895         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 896         struct cifs_open_parms oparms;
 897
 898         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
 899         if (!utf16_path)
 900                 return -ENOMEM;
 901
 902         oparms.tcon = tcon;
 903         oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
 904         oparms.disposition = FILE_OPEN;
 905         oparms.create_options = 0;
 906         oparms.fid = fid;
 907         oparms.reconnect = false;
 908
 909         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
 910         kfree(utf16_path);
 911         if (rc) {
 912                 cifs_dbg(VFS, "open dir failed\n");
 913                 return rc;
 914         }
 915
 916         srch_inf->entries_in_buffer = 0;
 917         srch_inf->index_of_last_entry = 0;
 918
 919         rc = SMB2_query_directory(xid, tcon, fid->persistent_fid,
 920                                   fid->volatile_fid, 0, srch_inf);
 921         if (rc) {
 922                 cifs_dbg(VFS, "query directory failed\n");
 923                 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 924         }
 925         return rc;
 926 }
 927
 928 static int
 929 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
 930                     struct cifs_fid *fid, __u16 search_flags,
 931                     struct cifs_search_info *srch_inf)
 932 {
 933         return SMB2_query_directory(xid, tcon, fid->persistent_fid,
 934                                     fid->volatile_fid, 0, srch_inf);
 935 }
 936
 937 static int
 938 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
 939                struct cifs_fid *fid)
 940 {
 941         return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 942 }
 943
 944 /*
 945 * If we negotiate SMB2 protocol and get STATUS_PENDING - update
 946 * the number of credits and return true. Otherwise - return false.
 947 */
 948 static bool
 949 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server, int length)
 950 {
 951         struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
 952
 953         if (hdr->Status != STATUS_PENDING)
 954                 return false;
 955
 956         if (!length) {
 957                 spin_lock(&server->req_lock);
 958                 server->credits += le16_to_cpu(hdr->CreditRequest);
 959                 spin_unlock(&server->req_lock);
 960                 wake_up(&server->request_q);
 961         }
 962
 963         return true;
 964 }
 965
 966 static int
 967 smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
 968                      struct cifsInodeInfo *cinode)
 969 {
 970         if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
 971                 return SMB2_lease_break(0, tcon, cinode->lease_key,
 972                                         smb2_get_lease_state(cinode));
 973
 974         return SMB2_oplock_break(0, tcon, fid->persistent_fid,
 975                                  fid->volatile_fid,
 976                                  CIFS_CACHE_READ(cinode) ? 1 : 0);
 977 }
 978
 979 static int
 980 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
 981              struct kstatfs *buf)
 982 {
 983         int rc;
 984         __le16 srch_path = 0; /* Null - open root of share */
 985         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 986         struct cifs_open_parms oparms;
 987         struct cifs_fid fid;
 988
 989         oparms.tcon = tcon;
 990         oparms.desired_access = FILE_READ_ATTRIBUTES;
 991         oparms.disposition = FILE_OPEN;
 992         oparms.create_options = 0;
 993         oparms.fid = &fid;
 994         oparms.reconnect = false;
 995
 996         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
 997         if (rc)
 998                 return rc;
 999         buf->f_type = SMB2_MAGIC_NUMBER;
1000         rc = SMB2_QFS_info(xid, tcon, fid.persistent_fid, fid.volatile_fid,
1001                            buf);
1002         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
1003         return rc;
1004 }
1005
1006 static bool
1007 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
1008 {
1009         return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
1010                ob1->fid.volatile_fid == ob2->fid.volatile_fid;
1011 }
1012
1013 static int
1014 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
1015                __u64 length, __u32 type, int lock, int unlock, bool wait)
1016 {
1017         if (unlock && !lock)
1018                 type = SMB2_LOCKFLAG_UNLOCK;
1019         return SMB2_lock(xid, tlink_tcon(cfile->tlink),
1020                          cfile->fid.persistent_fid, cfile->fid.volatile_fid,
1021                          current->tgid, length, offset, type, wait);
1022 }
1023
1024 static void
1025 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
1026 {
1027         memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
1028 }
1029
1030 static void
1031 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
1032 {
1033         memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
1034 }
1035
1036 static void
1037 smb2_new_lease_key(struct cifs_fid *fid)
1038 {
1039         get_random_bytes(fid->lease_key, SMB2_LEASE_KEY_SIZE);
1040 }
1041
1042 static int
1043 smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
1044                    const char *full_path, char **target_path,
1045                    struct cifs_sb_info *cifs_sb)
1046 {
1047         int rc;
1048         __le16 *utf16_path;
1049         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1050         struct cifs_open_parms oparms;
1051         struct cifs_fid fid;
1052         struct smb2_err_rsp *err_buf = NULL;
1053         struct smb2_symlink_err_rsp *symlink;
1054         unsigned int sub_len, sub_offset;
1055
1056         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
1057
1058         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
1059         if (!utf16_path)
1060                 return -ENOMEM;
1061
1062         oparms.tcon = tcon;
1063         oparms.desired_access = FILE_READ_ATTRIBUTES;
1064         oparms.disposition = FILE_OPEN;
1065         oparms.create_options = 0;
1066         oparms.fid = &fid;
1067         oparms.reconnect = false;
1068
1069         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, &err_buf);
1070
1071         if (!rc || !err_buf) {
1072                 kfree(utf16_path);
1073                 return -ENOENT;
1074         }
1075         /* open must fail on symlink - reset rc */
1076         rc = 0;
1077         symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData;
1078         sub_len = le16_to_cpu(symlink->SubstituteNameLength);
1079         sub_offset = le16_to_cpu(symlink->SubstituteNameOffset);
1080         *target_path = cifs_strndup_from_utf16(
1081                                 (char *)symlink->PathBuffer + sub_offset,
1082                                 sub_len, true, cifs_sb->local_nls);
1083         if (!(*target_path)) {
1084                 kfree(utf16_path);
1085                 return -ENOMEM;
1086         }
1087         convert_delimiter(*target_path, '/');
1088         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
1089         kfree(utf16_path);
1090         return rc;
1091 }
1092
1093 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
1094                             loff_t offset, loff_t len, bool keep_size)
1095 {
1096         struct inode *inode;
1097         struct cifsInodeInfo *cifsi;
1098         struct cifsFileInfo *cfile = file->private_data;
1099         struct file_zero_data_information fsctl_buf;
1100         long rc;
1101         unsigned int xid;
1102
1103         xid = get_xid();
1104
1105         inode = d_inode(cfile->dentry);
1106         cifsi = CIFS_I(inode);
1107
1108         /* if file not oplocked can't be sure whether asking to extend size */
1109         if (!CIFS_CACHE_READ(cifsi))
1110                 if (keep_size == false)
1111                         return -EOPNOTSUPP;
1112
1113         /*
1114          * Must check if file sparse since fallocate -z (zero range) assumes
1115          * non-sparse allocation
1116          */
1117         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE))
1118                 return -EOPNOTSUPP;
1119
1120         /*
1121          * need to make sure we are not asked to extend the file since the SMB3
1122          * fsctl does not change the file size. In the future we could change
1123          * this to zero the first part of the range then set the file size
1124          * which for a non sparse file would zero the newly extended range
1125          */
1126         if (keep_size == false)
1127                 if (i_size_read(inode) < offset + len)
1128                         return -EOPNOTSUPP;
1129
1130         cifs_dbg(FYI, "offset %lld len %lld", offset, len);
1131
1132         fsctl_buf.FileOffset = cpu_to_le64(offset);
1133         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
1134
1135         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1136                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
1137                         true /* is_fctl */, (char *)&fsctl_buf,
1138                         sizeof(struct file_zero_data_information), NULL, NULL);
1139         free_xid(xid);
1140         return rc;
1141 }
1142
1143 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
1144                             loff_t offset, loff_t len)
1145 {
1146         struct inode *inode;
1147         struct cifsInodeInfo *cifsi;
1148         struct cifsFileInfo *cfile = file->private_data;
1149         struct file_zero_data_information fsctl_buf;
1150         long rc;
1151         unsigned int xid;
1152         __u8 set_sparse = 1;
1153
1154         xid = get_xid();
1155
1156         inode = d_inode(cfile->dentry);
1157         cifsi = CIFS_I(inode);
1158
1159         /* Need to make file sparse, if not already, before freeing range. */
1160         /* Consider adding equivalent for compressed since it could also work */
1161         if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse))
1162                 return -EOPNOTSUPP;
1163
1164         cifs_dbg(FYI, "offset %lld len %lld", offset, len);
1165
1166         fsctl_buf.FileOffset = cpu_to_le64(offset);
1167         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
1168
1169         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1170                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
1171                         true /* is_fctl */, (char *)&fsctl_buf,
1172                         sizeof(struct file_zero_data_information), NULL, NULL);
1173         free_xid(xid);
1174         return rc;
1175 }
1176
1177 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
1178                             loff_t off, loff_t len, bool keep_size)
1179 {
1180         struct inode *inode;
1181         struct cifsInodeInfo *cifsi;
1182         struct cifsFileInfo *cfile = file->private_data;
1183         long rc = -EOPNOTSUPP;
1184         unsigned int xid;
1185
1186         xid = get_xid();
1187
1188         inode = d_inode(cfile->dentry);
1189         cifsi = CIFS_I(inode);
1190
1191         /* if file not oplocked can't be sure whether asking to extend size */
1192         if (!CIFS_CACHE_READ(cifsi))
1193                 if (keep_size == false)
1194                         return -EOPNOTSUPP;
1195
1196         /*
1197          * Files are non-sparse by default so falloc may be a no-op
1198          * Must check if file sparse. If not sparse, and not extending
1199          * then no need to do anything since file already allocated
1200          */
1201         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
1202                 if (keep_size == true)
1203                         return 0;
1204                 /* check if extending file */
1205                 else if (i_size_read(inode) >= off + len)
1206                         /* not extending file and already not sparse */
1207                         return 0;
1208                 /* BB: in future add else clause to extend file */
1209                 else
1210                         return -EOPNOTSUPP;
1211         }
1212
1213         if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
1214                 /*
1215                  * Check if falloc starts within first few pages of file
1216                  * and ends within a few pages of the end of file to
1217                  * ensure that most of file is being forced to be
1218                  * fallocated now. If so then setting whole file sparse
1219                  * ie potentially making a few extra pages at the beginning
1220                  * or end of the file non-sparse via set_sparse is harmless.
1221                  */
1222                 if ((off > 8192) || (off + len + 8192 < i_size_read(inode)))
1223                         return -EOPNOTSUPP;
1224
1225                 rc = smb2_set_sparse(xid, tcon, cfile, inode, false);
1226         }
1227         /* BB: else ... in future add code to extend file and set sparse */
1228
1229
1230         free_xid(xid);
1231         return rc;
1232 }
1233
1234
1235 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
1236                            loff_t off, loff_t len)
1237 {
1238         /* KEEP_SIZE already checked for by do_fallocate */
1239         if (mode & FALLOC_FL_PUNCH_HOLE)
1240                 return smb3_punch_hole(file, tcon, off, len);
1241         else if (mode & FALLOC_FL_ZERO_RANGE) {
1242                 if (mode & FALLOC_FL_KEEP_SIZE)
1243                         return smb3_zero_range(file, tcon, off, len, true);
1244                 return smb3_zero_range(file, tcon, off, len, false);
1245         } else if (mode == FALLOC_FL_KEEP_SIZE)
1246                 return smb3_simple_falloc(file, tcon, off, len, true);
1247         else if (mode == 0)
1248                 return smb3_simple_falloc(file, tcon, off, len, false);
1249
1250         return -EOPNOTSUPP;
1251 }
1252
1253 static void
1254 smb2_downgrade_oplock(struct TCP_Server_Info *server,
1255                         struct cifsInodeInfo *cinode, bool set_level2)
1256 {
1257         if (set_level2)
1258                 server->ops->set_oplock_level(cinode, SMB2_OPLOCK_LEVEL_II,
1259                                                 0, NULL);
1260         else
1261                 server->ops->set_oplock_level(cinode, 0, 0, NULL);
1262 }
1263
1264 static void
1265 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1266                       unsigned int epoch, bool *purge_cache)
1267 {
1268         oplock &= 0xFF;
1269         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
1270                 return;
1271         if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
1272                 cinode->oplock = CIFS_CACHE_RHW_FLG;
1273                 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
1274                          &cinode->vfs_inode);
1275         } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
1276                 cinode->oplock = CIFS_CACHE_RW_FLG;
1277                 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
1278                          &cinode->vfs_inode);
1279         } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
1280                 cinode->oplock = CIFS_CACHE_READ_FLG;
1281                 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
1282                          &cinode->vfs_inode);
1283         } else
1284                 cinode->oplock = 0;
1285 }
1286
1287 static void
1288 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1289                        unsigned int epoch, bool *purge_cache)
1290 {
1291         char message[5] = {0};
1292
1293         oplock &= 0xFF;
1294         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
1295                 return;
1296
1297         cinode->oplock = 0;
1298         if (oplock & SMB2_LEASE_READ_CACHING_HE) {
1299                 cinode->oplock |= CIFS_CACHE_READ_FLG;
1300                 strcat(message, "R");
1301         }
1302         if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
1303                 cinode->oplock |= CIFS_CACHE_HANDLE_FLG;
1304                 strcat(message, "H");
1305         }
1306         if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
1307                 cinode->oplock |= CIFS_CACHE_WRITE_FLG;
1308                 strcat(message, "W");
1309         }
1310         if (!cinode->oplock)
1311                 strcat(message, "None");
1312         cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
1313                  &cinode->vfs_inode);
1314 }
1315
1316 static void
1317 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1318                       unsigned int epoch, bool *purge_cache)
1319 {
1320         unsigned int old_oplock = cinode->oplock;
1321
1322         smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
1323
1324         if (purge_cache) {
1325                 *purge_cache = false;
1326                 if (old_oplock == CIFS_CACHE_READ_FLG) {
1327                         if (cinode->oplock == CIFS_CACHE_READ_FLG &&
1328                             (epoch - cinode->epoch > 0))
1329                                 *purge_cache = true;
1330                         else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
1331                                  (epoch - cinode->epoch > 1))
1332                                 *purge_cache = true;
1333                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
1334                                  (epoch - cinode->epoch > 1))
1335                                 *purge_cache = true;
1336                         else if (cinode->oplock == 0 &&
1337                                  (epoch - cinode->epoch > 0))
1338                                 *purge_cache = true;
1339                 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
1340                         if (cinode->oplock == CIFS_CACHE_RH_FLG &&
1341                             (epoch - cinode->epoch > 0))
1342                                 *purge_cache = true;
1343                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
1344                                  (epoch - cinode->epoch > 1))
1345                                 *purge_cache = true;
1346                 }
1347                 cinode->epoch = epoch;
1348         }
1349 }
1350
1351 static bool
1352 smb2_is_read_op(__u32 oplock)
1353 {
1354         return oplock == SMB2_OPLOCK_LEVEL_II;
1355 }
1356
1357 static bool
1358 smb21_is_read_op(__u32 oplock)
1359 {
1360         return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
1361                !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
1362 }
1363
1364 static __le32
1365 map_oplock_to_lease(u8 oplock)
1366 {
1367         if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
1368                 return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING;
1369         else if (oplock == SMB2_OPLOCK_LEVEL_II)
1370                 return SMB2_LEASE_READ_CACHING;
1371         else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
1372                 return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING |
1373                        SMB2_LEASE_WRITE_CACHING;
1374         return 0;
1375 }
1376
1377 static char *
1378 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
1379 {
1380         struct create_lease *buf;
1381
1382         buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
1383         if (!buf)
1384                 return NULL;
1385
1386         buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
1387         buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
1388         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
1389
1390         buf->ccontext.DataOffset = cpu_to_le16(offsetof
1391                                         (struct create_lease, lcontext));
1392         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
1393         buf->ccontext.NameOffset = cpu_to_le16(offsetof
1394                                 (struct create_lease, Name));
1395         buf->ccontext.NameLength = cpu_to_le16(4);
1396         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
1397         buf->Name[0] = 'R';
1398         buf->Name[1] = 'q';
1399         buf->Name[2] = 'L';
1400         buf->Name[3] = 's';
1401         return (char *)buf;
1402 }
1403
1404 static char *
1405 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
1406 {
1407         struct create_lease_v2 *buf;
1408
1409         buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
1410         if (!buf)
1411                 return NULL;
1412
1413         buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
1414         buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
1415         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
1416
1417         buf->ccontext.DataOffset = cpu_to_le16(offsetof
1418                                         (struct create_lease_v2, lcontext));
1419         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
1420         buf->ccontext.NameOffset = cpu_to_le16(offsetof
1421                                 (struct create_lease_v2, Name));
1422         buf->ccontext.NameLength = cpu_to_le16(4);
1423         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
1424         buf->Name[0] = 'R';
1425         buf->Name[1] = 'q';
1426         buf->Name[2] = 'L';
1427         buf->Name[3] = 's';
1428         return (char *)buf;
1429 }
1430
1431 static __u8
1432 smb2_parse_lease_buf(void *buf, unsigned int *epoch)
1433 {
1434         struct create_lease *lc = (struct create_lease *)buf;
1435
1436         *epoch = 0; /* not used */
1437         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
1438                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
1439         return le32_to_cpu(lc->lcontext.LeaseState);
1440 }
1441
1442 static __u8
1443 smb3_parse_lease_buf(void *buf, unsigned int *epoch)
1444 {
1445         struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
1446
1447         *epoch = le16_to_cpu(lc->lcontext.Epoch);
1448         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
1449                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
1450         return le32_to_cpu(lc->lcontext.LeaseState);
1451 }
1452
1453 static unsigned int
1454 smb2_wp_retry_size(struct inode *inode)
1455 {
1456         return min_t(unsigned int, CIFS_SB(inode->i_sb)->wsize,
1457                      SMB2_MAX_BUFFER_SIZE);
1458 }
1459
1460 static bool
1461 smb2_dir_needs_close(struct cifsFileInfo *cfile)
1462 {
1463         return !cfile->invalidHandle;
1464 }
1465
1466 struct smb_version_operations smb20_operations = {
1467         .compare_fids = smb2_compare_fids,
1468         .setup_request = smb2_setup_request,
1469         .setup_async_request = smb2_setup_async_request,
1470         .check_receive = smb2_check_receive,
1471         .add_credits = smb2_add_credits,
1472         .set_credits = smb2_set_credits,
1473         .get_credits_field = smb2_get_credits_field,
1474         .get_credits = smb2_get_credits,
1475         .wait_mtu_credits = cifs_wait_mtu_credits,
1476         .get_next_mid = smb2_get_next_mid,
1477         .read_data_offset = smb2_read_data_offset,
1478         .read_data_length = smb2_read_data_length,
1479         .map_error = map_smb2_to_linux_error,
1480         .find_mid = smb2_find_mid,
1481         .check_message = smb2_check_message,
1482         .dump_detail = smb2_dump_detail,
1483         .clear_stats = smb2_clear_stats,
1484         .print_stats = smb2_print_stats,
1485         .is_oplock_break = smb2_is_valid_oplock_break,
1486         .downgrade_oplock = smb2_downgrade_oplock,
1487         .need_neg = smb2_need_neg,
1488         .negotiate = smb2_negotiate,
1489         .negotiate_wsize = smb2_negotiate_wsize,
1490         .negotiate_rsize = smb2_negotiate_rsize,
1491         .sess_setup = SMB2_sess_setup,
1492         .logoff = SMB2_logoff,
1493         .tree_connect = SMB2_tcon,
1494         .tree_disconnect = SMB2_tdis,
1495         .qfs_tcon = smb2_qfs_tcon,
1496         .is_path_accessible = smb2_is_path_accessible,
1497         .can_echo = smb2_can_echo,
1498         .echo = SMB2_echo,
1499         .query_path_info = smb2_query_path_info,
1500         .get_srv_inum = smb2_get_srv_inum,
1501         .query_file_info = smb2_query_file_info,
1502         .set_path_size = smb2_set_path_size,
1503         .set_file_size = smb2_set_file_size,
1504         .set_file_info = smb2_set_file_info,
1505         .set_compression = smb2_set_compression,
1506         .mkdir = smb2_mkdir,
1507         .mkdir_setinfo = smb2_mkdir_setinfo,
1508         .rmdir = smb2_rmdir,
1509         .unlink = smb2_unlink,
1510         .rename = smb2_rename_path,
1511         .create_hardlink = smb2_create_hardlink,
1512         .query_symlink = smb2_query_symlink,
1513         .open = smb2_open_file,
1514         .set_fid = smb2_set_fid,
1515         .close = smb2_close_file,
1516         .flush = smb2_flush_file,
1517         .async_readv = smb2_async_readv,
1518         .async_writev = smb2_async_writev,
1519         .sync_read = smb2_sync_read,
1520         .sync_write = smb2_sync_write,
1521         .query_dir_first = smb2_query_dir_first,
1522         .query_dir_next = smb2_query_dir_next,
1523         .close_dir = smb2_close_dir,
1524         .calc_smb_size = smb2_calc_size,
1525         .is_status_pending = smb2_is_status_pending,
1526         .oplock_response = smb2_oplock_response,
1527         .queryfs = smb2_queryfs,
1528         .mand_lock = smb2_mand_lock,
1529         .mand_unlock_range = smb2_unlock_range,
1530         .push_mand_locks = smb2_push_mandatory_locks,
1531         .get_lease_key = smb2_get_lease_key,
1532         .set_lease_key = smb2_set_lease_key,
1533         .new_lease_key = smb2_new_lease_key,
1534         .calc_signature = smb2_calc_signature,
1535         .is_read_op = smb2_is_read_op,
1536         .set_oplock_level = smb2_set_oplock_level,
1537         .create_lease_buf = smb2_create_lease_buf,
1538         .parse_lease_buf = smb2_parse_lease_buf,
1539         .clone_range = smb2_clone_range,
1540         .wp_retry_size = smb2_wp_retry_size,
1541         .dir_needs_close = smb2_dir_needs_close,
1542 };
1543
1544 struct smb_version_operations smb21_operations = {
1545         .compare_fids = smb2_compare_fids,
1546         .setup_request = smb2_setup_request,
1547         .setup_async_request = smb2_setup_async_request,
1548         .check_receive = smb2_check_receive,
1549         .add_credits = smb2_add_credits,
1550         .set_credits = smb2_set_credits,
1551         .get_credits_field = smb2_get_credits_field,
1552         .get_credits = smb2_get_credits,
1553         .wait_mtu_credits = smb2_wait_mtu_credits,
1554         .get_next_mid = smb2_get_next_mid,
1555         .read_data_offset = smb2_read_data_offset,
1556         .read_data_length = smb2_read_data_length,
1557         .map_error = map_smb2_to_linux_error,
1558         .find_mid = smb2_find_mid,
1559         .check_message = smb2_check_message,
1560         .dump_detail = smb2_dump_detail,
1561         .clear_stats = smb2_clear_stats,
1562         .print_stats = smb2_print_stats,
1563         .is_oplock_break = smb2_is_valid_oplock_break,
1564         .downgrade_oplock = smb2_downgrade_oplock,
1565         .need_neg = smb2_need_neg,
1566         .negotiate = smb2_negotiate,
1567         .negotiate_wsize = smb2_negotiate_wsize,
1568         .negotiate_rsize = smb2_negotiate_rsize,
1569         .sess_setup = SMB2_sess_setup,
1570         .logoff = SMB2_logoff,
1571         .tree_connect = SMB2_tcon,
1572         .tree_disconnect = SMB2_tdis,
1573         .qfs_tcon = smb2_qfs_tcon,
1574         .is_path_accessible = smb2_is_path_accessible,
1575         .can_echo = smb2_can_echo,
1576         .echo = SMB2_echo,
1577         .query_path_info = smb2_query_path_info,
1578         .get_srv_inum = smb2_get_srv_inum,
1579         .query_file_info = smb2_query_file_info,
1580         .set_path_size = smb2_set_path_size,
1581         .set_file_size = smb2_set_file_size,
1582         .set_file_info = smb2_set_file_info,
1583         .set_compression = smb2_set_compression,
1584         .mkdir = smb2_mkdir,
1585         .mkdir_setinfo = smb2_mkdir_setinfo,
1586         .rmdir = smb2_rmdir,
1587         .unlink = smb2_unlink,
1588         .rename = smb2_rename_path,
1589         .create_hardlink = smb2_create_hardlink,
1590         .query_symlink = smb2_query_symlink,
1591         .query_mf_symlink = smb3_query_mf_symlink,
1592         .create_mf_symlink = smb3_create_mf_symlink,
1593         .open = smb2_open_file,
1594         .set_fid = smb2_set_fid,
1595         .close = smb2_close_file,
1596         .flush = smb2_flush_file,
1597         .async_readv = smb2_async_readv,
1598         .async_writev = smb2_async_writev,
1599         .sync_read = smb2_sync_read,
1600         .sync_write = smb2_sync_write,
1601         .query_dir_first = smb2_query_dir_first,
1602         .query_dir_next = smb2_query_dir_next,
1603         .close_dir = smb2_close_dir,
1604         .calc_smb_size = smb2_calc_size,
1605         .is_status_pending = smb2_is_status_pending,
1606         .oplock_response = smb2_oplock_response,
1607         .queryfs = smb2_queryfs,
1608         .mand_lock = smb2_mand_lock,
1609         .mand_unlock_range = smb2_unlock_range,
1610         .push_mand_locks = smb2_push_mandatory_locks,
1611         .get_lease_key = smb2_get_lease_key,
1612         .set_lease_key = smb2_set_lease_key,
1613         .new_lease_key = smb2_new_lease_key,
1614         .calc_signature = smb2_calc_signature,
1615         .is_read_op = smb21_is_read_op,
1616         .set_oplock_level = smb21_set_oplock_level,
1617         .create_lease_buf = smb2_create_lease_buf,
1618         .parse_lease_buf = smb2_parse_lease_buf,
1619         .clone_range = smb2_clone_range,
1620         .wp_retry_size = smb2_wp_retry_size,
1621         .dir_needs_close = smb2_dir_needs_close,
1622 };
1623
1624 struct smb_version_operations smb30_operations = {
1625         .compare_fids = smb2_compare_fids,
1626         .setup_request = smb2_setup_request,
1627         .setup_async_request = smb2_setup_async_request,
1628         .check_receive = smb2_check_receive,
1629         .add_credits = smb2_add_credits,
1630         .set_credits = smb2_set_credits,
1631         .get_credits_field = smb2_get_credits_field,
1632         .get_credits = smb2_get_credits,
1633         .wait_mtu_credits = smb2_wait_mtu_credits,
1634         .get_next_mid = smb2_get_next_mid,
1635         .read_data_offset = smb2_read_data_offset,
1636         .read_data_length = smb2_read_data_length,
1637         .map_error = map_smb2_to_linux_error,
1638         .find_mid = smb2_find_mid,
1639         .check_message = smb2_check_message,
1640         .dump_detail = smb2_dump_detail,
1641         .clear_stats = smb2_clear_stats,
1642         .print_stats = smb2_print_stats,
1643         .dump_share_caps = smb2_dump_share_caps,
1644         .is_oplock_break = smb2_is_valid_oplock_break,
1645         .downgrade_oplock = smb2_downgrade_oplock,
1646         .need_neg = smb2_need_neg,
1647         .negotiate = smb2_negotiate,
1648         .negotiate_wsize = smb2_negotiate_wsize,
1649         .negotiate_rsize = smb2_negotiate_rsize,
1650         .sess_setup = SMB2_sess_setup,
1651         .logoff = SMB2_logoff,
1652         .tree_connect = SMB2_tcon,
1653         .tree_disconnect = SMB2_tdis,
1654         .qfs_tcon = smb3_qfs_tcon,
1655         .is_path_accessible = smb2_is_path_accessible,
1656         .can_echo = smb2_can_echo,
1657         .echo = SMB2_echo,
1658         .query_path_info = smb2_query_path_info,
1659         .get_srv_inum = smb2_get_srv_inum,
1660         .query_file_info = smb2_query_file_info,
1661         .set_path_size = smb2_set_path_size,
1662         .set_file_size = smb2_set_file_size,
1663         .set_file_info = smb2_set_file_info,
1664         .set_compression = smb2_set_compression,
1665         .mkdir = smb2_mkdir,
1666         .mkdir_setinfo = smb2_mkdir_setinfo,
1667         .rmdir = smb2_rmdir,
1668         .unlink = smb2_unlink,
1669         .rename = smb2_rename_path,
1670         .create_hardlink = smb2_create_hardlink,
1671         .query_symlink = smb2_query_symlink,
1672         .query_mf_symlink = smb3_query_mf_symlink,
1673         .create_mf_symlink = smb3_create_mf_symlink,
1674         .open = smb2_open_file,
1675         .set_fid = smb2_set_fid,
1676         .close = smb2_close_file,
1677         .flush = smb2_flush_file,
1678         .async_readv = smb2_async_readv,
1679         .async_writev = smb2_async_writev,
1680         .sync_read = smb2_sync_read,
1681         .sync_write = smb2_sync_write,
1682         .query_dir_first = smb2_query_dir_first,
1683         .query_dir_next = smb2_query_dir_next,
1684         .close_dir = smb2_close_dir,
1685         .calc_smb_size = smb2_calc_size,
1686         .is_status_pending = smb2_is_status_pending,
1687         .oplock_response = smb2_oplock_response,
1688         .queryfs = smb2_queryfs,
1689         .mand_lock = smb2_mand_lock,
1690         .mand_unlock_range = smb2_unlock_range,
1691         .push_mand_locks = smb2_push_mandatory_locks,
1692         .get_lease_key = smb2_get_lease_key,
1693         .set_lease_key = smb2_set_lease_key,
1694         .new_lease_key = smb2_new_lease_key,
1695         .generate_signingkey = generate_smb3signingkey,
1696         .calc_signature = smb3_calc_signature,
1697         .set_integrity  = smb3_set_integrity,
1698         .is_read_op = smb21_is_read_op,
1699         .set_oplock_level = smb3_set_oplock_level,
1700         .create_lease_buf = smb3_create_lease_buf,
1701         .parse_lease_buf = smb3_parse_lease_buf,
1702         .clone_range = smb2_clone_range,
1703         .duplicate_extents = smb2_duplicate_extents,
1704         .validate_negotiate = smb3_validate_negotiate,
1705         .wp_retry_size = smb2_wp_retry_size,
1706         .dir_needs_close = smb2_dir_needs_close,
1707         .fallocate = smb3_fallocate,
1708 };
1709
1710 #ifdef CONFIG_CIFS_SMB311
1711 struct smb_version_operations smb311_operations = {
1712         .compare_fids = smb2_compare_fids,
1713         .setup_request = smb2_setup_request,
1714         .setup_async_request = smb2_setup_async_request,
1715         .check_receive = smb2_check_receive,
1716         .add_credits = smb2_add_credits,
1717         .set_credits = smb2_set_credits,
1718         .get_credits_field = smb2_get_credits_field,
1719         .get_credits = smb2_get_credits,
1720         .wait_mtu_credits = smb2_wait_mtu_credits,
1721         .get_next_mid = smb2_get_next_mid,
1722         .read_data_offset = smb2_read_data_offset,
1723         .read_data_length = smb2_read_data_length,
1724         .map_error = map_smb2_to_linux_error,
1725         .find_mid = smb2_find_mid,
1726         .check_message = smb2_check_message,
1727         .dump_detail = smb2_dump_detail,
1728         .clear_stats = smb2_clear_stats,
1729         .print_stats = smb2_print_stats,
1730         .dump_share_caps = smb2_dump_share_caps,
1731         .is_oplock_break = smb2_is_valid_oplock_break,
1732         .downgrade_oplock = smb2_downgrade_oplock,
1733         .need_neg = smb2_need_neg,
1734         .negotiate = smb2_negotiate,
1735         .negotiate_wsize = smb2_negotiate_wsize,
1736         .negotiate_rsize = smb2_negotiate_rsize,
1737         .sess_setup = SMB2_sess_setup,
1738         .logoff = SMB2_logoff,
1739         .tree_connect = SMB2_tcon,
1740         .tree_disconnect = SMB2_tdis,
1741         .qfs_tcon = smb3_qfs_tcon,
1742         .is_path_accessible = smb2_is_path_accessible,
1743         .can_echo = smb2_can_echo,
1744         .echo = SMB2_echo,
1745         .query_path_info = smb2_query_path_info,
1746         .get_srv_inum = smb2_get_srv_inum,
1747         .query_file_info = smb2_query_file_info,
1748         .set_path_size = smb2_set_path_size,
1749         .set_file_size = smb2_set_file_size,
1750         .set_file_info = smb2_set_file_info,
1751         .set_compression = smb2_set_compression,
1752         .mkdir = smb2_mkdir,
1753         .mkdir_setinfo = smb2_mkdir_setinfo,
1754         .rmdir = smb2_rmdir,
1755         .unlink = smb2_unlink,
1756         .rename = smb2_rename_path,
1757         .create_hardlink = smb2_create_hardlink,
1758         .query_symlink = smb2_query_symlink,
1759         .query_mf_symlink = smb3_query_mf_symlink,
1760         .create_mf_symlink = smb3_create_mf_symlink,
1761         .open = smb2_open_file,
1762         .set_fid = smb2_set_fid,
1763         .close = smb2_close_file,
1764         .flush = smb2_flush_file,
1765         .async_readv = smb2_async_readv,
1766         .async_writev = smb2_async_writev,
1767         .sync_read = smb2_sync_read,
1768         .sync_write = smb2_sync_write,
1769         .query_dir_first = smb2_query_dir_first,
1770         .query_dir_next = smb2_query_dir_next,
1771         .close_dir = smb2_close_dir,
1772         .calc_smb_size = smb2_calc_size,
1773         .is_status_pending = smb2_is_status_pending,
1774         .oplock_response = smb2_oplock_response,
1775         .queryfs = smb2_queryfs,
1776         .mand_lock = smb2_mand_lock,
1777         .mand_unlock_range = smb2_unlock_range,
1778         .push_mand_locks = smb2_push_mandatory_locks,
1779         .get_lease_key = smb2_get_lease_key,
1780         .set_lease_key = smb2_set_lease_key,
1781         .new_lease_key = smb2_new_lease_key,
1782         .generate_signingkey = generate_smb3signingkey,
1783         .calc_signature = smb3_calc_signature,
1784         .set_integrity  = smb3_set_integrity,
1785         .is_read_op = smb21_is_read_op,
1786         .set_oplock_level = smb3_set_oplock_level,
1787         .create_lease_buf = smb3_create_lease_buf,
1788         .parse_lease_buf = smb3_parse_lease_buf,
1789         .clone_range = smb2_clone_range,
1790         .duplicate_extents = smb2_duplicate_extents,
1791 /*      .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
1792         .wp_retry_size = smb2_wp_retry_size,
1793         .dir_needs_close = smb2_dir_needs_close,
1794         .fallocate = smb3_fallocate,
1795 };
1796 #endif /* CIFS_SMB311 */
1797
1798 struct smb_version_values smb20_values = {
1799         .version_string = SMB20_VERSION_STRING,
1800         .protocol_id = SMB20_PROT_ID,
1801         .req_capabilities = 0, /* MBZ */
1802         .large_lock_type = 0,
1803         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1804         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1805         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1806         .header_size = sizeof(struct smb2_hdr),
1807         .max_header_size = MAX_SMB2_HDR_SIZE,
1808         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1809         .lock_cmd = SMB2_LOCK,
1810         .cap_unix = 0,
1811         .cap_nt_find = SMB2_NT_FIND,
1812         .cap_large_files = SMB2_LARGE_FILES,
1813         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1814         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1815         .create_lease_size = sizeof(struct create_lease),
1816 };
1817
1818 struct smb_version_values smb21_values = {
1819         .version_string = SMB21_VERSION_STRING,
1820         .protocol_id = SMB21_PROT_ID,
1821         .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
1822         .large_lock_type = 0,
1823         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1824         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1825         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1826         .header_size = sizeof(struct smb2_hdr),
1827         .max_header_size = MAX_SMB2_HDR_SIZE,
1828         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1829         .lock_cmd = SMB2_LOCK,
1830         .cap_unix = 0,
1831         .cap_nt_find = SMB2_NT_FIND,
1832         .cap_large_files = SMB2_LARGE_FILES,
1833         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1834         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1835         .create_lease_size = sizeof(struct create_lease),
1836 };
1837
1838 struct smb_version_values smb30_values = {
1839         .version_string = SMB30_VERSION_STRING,
1840         .protocol_id = SMB30_PROT_ID,
1841         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES,
1842         .large_lock_type = 0,
1843         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1844         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1845         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1846         .header_size = sizeof(struct smb2_hdr),
1847         .max_header_size = MAX_SMB2_HDR_SIZE,
1848         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1849         .lock_cmd = SMB2_LOCK,
1850         .cap_unix = 0,
1851         .cap_nt_find = SMB2_NT_FIND,
1852         .cap_large_files = SMB2_LARGE_FILES,
1853         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1854         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1855         .create_lease_size = sizeof(struct create_lease_v2),
1856 };
1857
1858 struct smb_version_values smb302_values = {
1859         .version_string = SMB302_VERSION_STRING,
1860         .protocol_id = SMB302_PROT_ID,
1861         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES,
1862         .large_lock_type = 0,
1863         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1864         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1865         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1866         .header_size = sizeof(struct smb2_hdr),
1867         .max_header_size = MAX_SMB2_HDR_SIZE,
1868         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1869         .lock_cmd = SMB2_LOCK,
1870         .cap_unix = 0,
1871         .cap_nt_find = SMB2_NT_FIND,
1872         .cap_large_files = SMB2_LARGE_FILES,
1873         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1874         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1875         .create_lease_size = sizeof(struct create_lease_v2),
1876 };
1877
1878 #ifdef CONFIG_CIFS_SMB311
1879 struct smb_version_values smb311_values = {
1880         .version_string = SMB311_VERSION_STRING,
1881         .protocol_id = SMB311_PROT_ID,
1882         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES,
1883         .large_lock_type = 0,
1884         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1885         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1886         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1887         .header_size = sizeof(struct smb2_hdr),
1888         .max_header_size = MAX_SMB2_HDR_SIZE,
1889         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1890         .lock_cmd = SMB2_LOCK,
1891         .cap_unix = 0,
1892         .cap_nt_find = SMB2_NT_FIND,
1893         .cap_large_files = SMB2_LARGE_FILES,
1894         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1895         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1896         .create_lease_size = sizeof(struct create_lease_v2),
1897 };
1898 #endif /* SMB311 */