source3/include/vfs.h

   1 /*
   2    Unix SMB/CIFS implementation.
   3    VFS structures and parameters
   4    Copyright (C) Jeremy Allison                         1999-2005
   5    Copyright (C) Tim Potter                             1999
   6    Copyright (C) Alexander Bokovoy                      2002-2005
   7    Copyright (C) Stefan (metze) Metzmacher              2003
   8    Copyright (C) Volker Lendecke                        2009
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 3 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  22
  23    This work was sponsored by Optifacio Software Services, Inc.
  24 */
  25
  26 #ifndef _VFS_H
  27 #define _VFS_H
  28
  29 /* Avoid conflict with an AIX include file */
  30
  31 #ifdef vfs_ops
  32 #undef vfs_ops
  33 #endif
  34
  35 /*
  36  * As we're now (thanks Andrew ! :-) using file_structs and connection
  37  * structs in the vfs - then anyone writing a vfs must include includes.h...
  38  */
  39
  40 /*
  41  * This next constant specifies the version number of the VFS interface
  42  * this smbd will load. Increment this if *ANY* changes are made to the
  43  * vfs_ops below. JRA.
  44  *
  45  * If you change anything here, please also update modules/vfs_full_audit.c.
  46  * VL.
  47  */
  48
  49 /* Changed to version 2 for CIFS UNIX extensions (mknod and link added). JRA. */
  50 /* Changed to version 3 for POSIX acl extensions. JRA. */
  51 /* Changed to version 4 for cascaded VFS interface. Alexander Bokovoy. */
  52 /* Changed to version 5 for sendfile addition. JRA. */
  53 /* Changed to version 6 for the new module system, fixed cascading and quota functions. --metze */
  54 /* Changed to version 7 to include the get_nt_acl info parameter. JRA. */
  55 /* Changed to version 8 includes EA calls. JRA. */
  56 /* Changed to version 9 to include the get_shadow_data call. --metze */
  57 /* Changed to version 10 to include pread/pwrite calls. */
  58 /* Changed to version 11 to include seekdir/telldir/rewinddir calls. JRA */
  59 /* Changed to version 12 to add mask and attributes to opendir(). JRA
  60    Also include aio calls. JRA. */
  61 /* Changed to version 13 as the internal structure of files_struct has changed. JRA */
  62 /* Changed to version 14 as we had to change DIR to SMB_STRUCT_DIR. JRA */
  63 /* Changed to version 15 as we added the statvfs call. JRA */
  64 /* Changed to version 16 as we added the getlock call. JRA */
  65 /* Changed to version 17 as we removed redundant connection_struct parameters. --jpeach */
  66 /* Changed to version 18 to add fsp parameter to the open call -- jpeach
  67    Also include kernel_flock call - jmcd */
  68 /* Changed to version 19, kernel change notify has been merged
  69    Also included linux setlease call - jmcd */
  70 /* Changed to version 20, use ntimes call instead of utime (greater
  71  * timestamp resolition. JRA. */
  72 /* Changed to version21 to add chflags operation -- jpeach */
  73 /* Changed to version22 to add lchown operation -- jra */
  74 /* Leave at 22 - not yet released. But change set_nt_acl to return an NTSTATUS. jra. */
  75 /* Leave at 22 - not yet released. Add file_id_create operation. --metze */
  76 /* Leave at 22 - not yet released. Change all BOOL parameters (int) to bool. jra. */
  77 /* Leave at 22 - not yet released. Added recvfile. */
  78 /* Leave at 22 - not yet released. Change get_nt_acl to return NTSTATUS - vl */
  79 /* Leave at 22 - not yet released. Change get_nt_acl to *not* take a
  80  * files_struct. - obnox.*/
  81 /* Leave at 22 - not yet released. Remove parameter fd from fget_nt_acl. - obnox */
  82 /* Leave at 22 - not yet released. Remove parameter fd from gset_nt_acl. - obnox */
  83 /* Leave at 22 - not yet released. Remove parameter fd from pread. - obnox */
  84 /* Leave at 22 - not yet released. Remove parameter fd from pwrite. - obnox */
  85 /* Leave at 22 - not yet released. Remove parameter fd from lseek. - obnox */
  86 /* Leave at 22 - not yet released. Remove parameter fd from fsync. - obnox */
  87 /* Leave at 22 - not yet released. Remove parameter fd from fstat. - obnox */
  88 /* Leave at 22 - not yet released. Remove parameter fd from fchmod. - obnox */
  89 /* Leave at 22 - not yet released. Remove parameter fd from fchown. - obnox */
  90 /* Leave at 22 - not yet released. Remove parameter fd from ftruncate. - obnox */
  91 /* Leave at 22 - not yet released. Remove parameter fd from lock. - obnox */
  92 /* Leave at 22 - not yet released. Remove parameter fd from kernel_flock. - obnox */
  93 /* Leave at 22 - not yet released. Remove parameter fd from linux_setlease. - obnox */
  94 /* Leave at 22 - not yet released. Remove parameter fd from getlock. - obnox */
  95 /* Leave at 22 - not yet released. Remove parameter fd from sys_acl_get_fd. - obnox */
  96 /* Leave at 22 - not yet released. Remove parameter fd from fchmod_acl. - obnox */
  97 /* Leave at 22 - not yet released. Remove parameter fd from sys_acl_set_fd. - obnox */
  98 /* Leave at 22 - not yet released. Remove parameter fd from fgetxattr. - obnox */
  99 /* Leave at 22 - not yet released. Remove parameter fd from flistxattr. - obnox */
 100 /* Leave at 22 - not yet released. Remove parameter fd from fremovexattr. - obnox */
 101 /* Leave at 22 - not yet released. Remove parameter fd from fsetxattr. - obnox */
 102 /* Leave at 22 - not yet released. Remove parameter fd from aio_cancel. - obnox */
 103 /* Leave at 22 - not yet released. Remove parameter fd from read. - obnox */
 104 /* Leave at 22 - not yet released. Remove parameter fd from write. - obnox */
 105 /* Leave at 22 - not yet released. Remove parameter fromfd from sendfile. - obnox */
 106 /* Leave at 22 - not yet released. Remove parameter fromfd from recvfile. - obnox */
 107 /* Leave at 22 - not yet released. Additional change: add operations for offline files -- ab */
 108 /* Leave at 22 - not yet released. Add the streaminfo call. -- jpeach, vl */
 109 /* Leave at 22 - not yet released. Remove parameter fd from close_fn. - obnox */
 110 /* Changed to version 23 - remove set_nt_acl call. This can only be done via an
 111    open handle. JRA. */
 112 /* Changed to version 24 - make security descriptor const in fset_nt_acl. JRA. */
 113 /* Changed to version 25 - Jelmer's change from SMB_BIG_UINT to uint64_t. */
 114 /* Leave at 25 - not yet released. Add create_file call. -- tprouty. */
 115 /* Leave at 25 - not yet released. Add create time to ntimes. -- tstecher. */
 116 /* Leave at 25 - not yet released. Add get_alloc_size call. -- tprouty. */
 117 /* Leave at 25 - not yet released. Add SMB_STRUCT_STAT to readdir. - sdann */
 118 /* Leave at 25 - not yet released. Add init_search_op call. - sdann */
 119 /* Leave at 25 - not yet released. Add locking calls. -- zkirsch. */
 120 /* Leave at 25 - not yet released. Add strict locking calls. -- drichards. */
 121 /* Changed to version 26 - Plumb struct smb_filename to SMB_VFS_CREATE_FILE,
 122                            SMB_VFS_OPEN, SMB_VFS_STAT, SMB_VFS_LSTAT,
 123                            SMB_VFS_RENAME, SMB_VFS_UNLINK, SMB_VFS_NTIMES.  */
 124 /* Changed to version 27 - not yet released. Added enum timestamp_set_resolution
 125  *                         return to fs_capabilities call. JRA. */
 126 /* Leave at 27 - not yet released. Add translate_name VFS call to convert
 127                  UNIX names to Windows supported names -- asrinivasan. */
 128 /* Changed to version 28 - Add private_flags uint32_t to CREATE call. */
 129 /* Leave at 28 - not yet released. Change realpath to assume NULL and return a
 130                  malloc'ed path. JRA. */
 131 /* Leave at 28 - not yet released. Move posix_fallocate into the VFS
 132                 where it belongs. JRA. */
 133 /* Leave at 28 - not yet released. Rename posix_fallocate to fallocate
 134                 to split out the two possible uses. JRA. */
 135 /* Leave at 28 - not yet released. Add fdopendir. JRA. */
 136 /* Leave at 28 - not yet released. Rename open function to open_fn. - gd */
 137 /* Leave at 28 - not yet released. Make getwd function always return malloced memory. JRA. */
 138 /* Bump to version 29 - Samba 3.6.0 will ship with interface version 28. */
 139 /* Leave at 29 - not yet releases. Add fsctl. Richard Sharpe */
 140 /* Leave at 29 - not yet released. add SMB_VFS_GET_DFS_REFERRAL() - metze */
 141 /* Leave at 29 - not yet released. Remove l{list,get,set,remove}xattr - abartlet */
 142 /* Leave at 29 - not yet released. move to plain off_t - abartlet */
 143 /* Leave at 29 - not yet released. Remove sys_acl functions other than set and get - abartlet */
 144 /* Leave at 29 - not yet released. Added backup_intent bool to files_struct - JRA */
 145 /* Leave at 29 - not yet released. Add durable handle functions - metze/obnox */
 146 /* Leave at 29 - not yet released. Added sys_acl_blob_get_file and sys_acl_blob_get_fd */
 147 /* Bump to version 30 - Samba 4.0.0 will ship with interface version 30 */
 148 /* Leave at 30 - not yet released. Added conn->cwd to save vfs_GetWd() calls. */
 149 /* Leave at 30 - not yet released. Changed sys_acl_blob_get_file interface to remove type */
 150 /* Bump to version 31 - Samba 4.1.0 will ship with interface version 31 */
 151 /* Leave at 31 - not yet released. Make struct vuid_cache_entry in
 152                 connection_struct a pointer. */
 153 /* Leave at 31 - not yet released. Add share_access to vuid_cache_entry. */
 154 /* Leave at 31 - not yet released. add SMB_VFS_COPY_CHUNK() */
 155 /* Leave at 31 - not yet released. Remove the unused
 156                 fsp->pending_break_messages array */
 157 /* Leave at 31 - not yet released. add SMB_VFS_[GET/SET]_COMPRESSION() */
 158
 159 /* Bump to version 32 - Samba 4.2 will ship with that. */
 160 /* Version 32 - Add "lease" to CREATE_FILE operation */
 161 /* Version 32 - Add "lease" to struct files_struct */
 162 /* Version 32 - Add SMB_VFS_READDIR_ATTR() */
 163 /* Version 32 - Add in and out create context blobs to create_file */
 164 /* Version 32 - Remove unnecessary SMB_VFS_DISK_FREE() small_query parameter */
 165 /* Bump to version 33 - Samba 4.3 will ship with that. */
 166 /* Version 33 - change fallocate mode flags param from enum->uint32_t */
 167 /* Version 33 - Add snapshot create/delete calls */
 168 /* Version 33 - Add OS X SMB2 AAPL copyfile extension flag to fsp */
 169 /* Version 33 - Remove notify_watch_fn */
 170 /* Bump to version 34 - Samba 4.4 will ship with that */
 171 /* Version 34 - Remove bool posix_open, add uint64_t posix_flags */
 172 /* Version 34 - Added bool posix_pathnames to struct smb_request */
 173 /* Bump to version 35 - Samba 4.5 will ship with that */
 174 /* Version 35 - Change get_nt_acl_fn from const char *, to
 175                 const struct smb_filename * */
 176 /* Version 35 - Change mkdir from const char *, to
 177                 const struct smb_filename * */
 178 /* Version 35 - Change rmdir from const char *, to
 179                 const struct smb_filename * */
 180 /* Version 35 - Change opendir from const char *, to
 181                 const struct smb_filename * */
 182 /* Version 35 - Wrap aio async funtions args in a struct vfs_aio_state */
 183 /* Version 35 - Change chmod from const char *, to
 184                 const struct smb_filename * */
 185 /* Version 35 - Change chmod_acl from const char *, to
 186                 const struct smb_filename * */
 187 /* Version 35 - Change chown from const char *, to
 188                 const struct smb_filename * */
 189 /* Version 35 - Change lchown from const char *, to
 190                 const struct smb_filename * */
 191 /* Version 35 - Change streaminfo from const char *, to
 192                 const struct smb_filename * */
 193 /* Version 35 - Add uint32_t flags to struct smb_filename */
 194 /* Version 35 - Add get/set/fget/fset dos attribute functions. */
 195 /* Version 35 - Add bool use_ofd_locks to struct files_struct */
 196 /* Bump to version 36 - Samba 4.6 will ship with that */
 197 /* Version 36 - Remove is_offline and set_offline */
 198 /* Version 37 - Module init functions now take a TALLOC_CTX * parameter. */
 199 /* Version 37 - Add vfs_copy_chunk_flags for DUP_EXTENTS_TO_FILE */
 200 /* Version 37 - Change sys_acl_delete_def_file from const char *
 201                 to const struct smb_filename * */
 202 /* Version 37 - Change sys_acl_get_file from const char *
 203                 to const struct smb_filename * */
 204 /* Version 37 - Change sys_acl_blob_get_file from const char *
 205                 to const struct smb_filename * */
 206 /* Version 37 - Change sys_acl_set_file from const char *
 207                 to const struct smb_filename * */
 208 /* Version 37 - Change listxattr from const char *
 209                 to const struct smb_filename * */
 210 /* Version 37 - Change removexattr from const char *
 211                 to const struct smb_filename * */
 212 /* Version 37 - Change setxattr from const char *
 213                 to const struct smb_filename * */
 214 /* Version 37 - Change getxattr from const char *
 215                 to const struct smb_filename * */
 216
 217 #define SMB_VFS_INTERFACE_VERSION 37
 218
 219 /*
 220     All intercepted VFS operations must be declared as static functions inside module source
 221     in order to keep smbd namespace unpolluted. See source of audit, extd_audit, fake_perms and recycle
 222     example VFS modules for more details.
 223 */
 224
 225 /* VFS operations structure */
 226
 227 struct vfs_handle_struct;
 228 struct connection_struct;
 229 struct files_struct;
 230 struct security_descriptor;
 231 struct vfs_statvfs_struct;
 232 struct smb_request;
 233 struct ea_list;
 234 struct smb_file_time;
 235 struct blocking_lock_record;
 236 struct smb_filename;
 237 struct dfs_GetDFSReferral;
 238
 239 typedef union unid_t {
 240         uid_t uid;
 241         gid_t gid;
 242 } unid_t;
 243
 244 struct fd_handle {
 245         size_t ref_count;
 246         int fd;
 247         uint64_t position_information;
 248         off_t pos;
 249         uint32_t private_options;       /* NT Create options, but we only look at
 250                                  * NTCREATEX_OPTIONS_PRIVATE_DENY_DOS and
 251                                  * NTCREATEX_OPTIONS_PRIVATE_DENY_FCB and
 252                                  * NTCREATEX_OPTIONS_PRIVATE_DELETE_ON_CLOSE
 253                                  * for print files *only*, where
 254                                  * DELETE_ON_CLOSE is not stored in the share
 255                                  * mode database.
 256                                  */
 257         unsigned long gen_id;
 258 };
 259
 260 struct fsp_lease {
 261         size_t ref_count;
 262         struct smbd_server_connection *sconn;
 263         struct tevent_timer *timeout;
 264         struct smb2_lease lease;
 265 };
 266
 267 typedef struct files_struct {
 268         struct files_struct *next, *prev;
 269         uint64_t fnum;
 270         struct smbXsrv_open *op;
 271         struct connection_struct *conn;
 272         struct fd_handle *fh;
 273         unsigned int num_smb_operations;
 274         struct file_id file_id;
 275         uint64_t initial_allocation_size; /* Faked up initial allocation on disk. */
 276         uint16_t file_pid;
 277         uint64_t vuid; /* SMB2 compat */
 278         struct write_cache *wcp;
 279         struct timeval open_time;
 280         uint32_t access_mask;           /* NTCreateX access bits (FILE_READ_DATA etc.) */
 281         uint32_t share_access;          /* NTCreateX share constants (FILE_SHARE_READ|FILE_SHARE_WRITE|FILE_SHARE_DELETE). */
 282
 283         bool kernel_share_modes_taken;
 284
 285         bool update_write_time_triggered;
 286         struct tevent_timer *update_write_time_event;
 287         bool update_write_time_on_close;
 288         struct timespec close_write_time;
 289         bool write_time_forced;
 290
 291         int oplock_type;
 292         struct fsp_lease *lease;
 293         int sent_oplock_break;
 294         struct tevent_timer *oplock_timeout;
 295         struct lock_struct last_lock_failure;
 296         int current_lock_count; /* Count the number of outstanding locks and pending locks. */
 297
 298         bool can_lock;
 299         bool can_read;
 300         bool can_write;
 301         bool modified;
 302         bool is_directory;
 303         bool aio_write_behind;
 304         bool initial_delete_on_close; /* Only set at NTCreateX if file was created. */
 305         bool delete_on_close;
 306         uint64_t posix_flags;
 307         bool is_sparse;
 308         bool backup_intent; /* Handle was successfully opened with backup intent
 309                                 and opener has privilege to do so. */
 310         bool aapl_copyfile_supported;
 311         bool use_ofd_locks; /* Are we using open file description locks ? */
 312         struct smb_filename *fsp_name;
 313         uint32_t name_hash;             /* Jenkins hash of full pathname. */
 314         uint64_t mid;                   /* Mid of the operation that created us. */
 315
 316         struct vfs_fsp_data *vfs_extension;
 317         struct fake_file_handle *fake_file_handle;
 318
 319         struct notify_change_buf *notify;
 320
 321         struct files_struct *base_fsp; /* placeholder for delete on close */
 322
 323         /*
 324          * Read-only cached brlock record, thrown away when the
 325          * brlock.tdb seqnum changes. This avoids fetching data from
 326          * the brlock.tdb on every read/write call.
 327          */
 328         int brlock_seqnum;
 329         struct byte_range_lock *brlock_rec;
 330
 331         struct dptr_struct *dptr;
 332
 333         /* if not NULL, means this is a print file */
 334         struct print_file_data *print_file;
 335
 336         unsigned num_aio_requests;
 337         struct tevent_req **aio_requests;
 338
 339         /*
 340          * If a close request comes in while we still have aio_requests
 341          * around, we need to hold back the close. When all aio_requests are
 342          * done, the aio completion routines need tevent_wait_done() on
 343          * this. A bit ugly, but before we have close_file() fully async
 344          * possibly the simplest approach. Thanks, Jeremy for the idea.
 345          */
 346         struct tevent_req *deferred_close;
 347 } files_struct;
 348
 349 #define FSP_POSIX_FLAGS_OPEN            0x01
 350 #define FSP_POSIX_FLAGS_RENAME          0x02
 351 #define FSP_POSIX_FLAGS_PATHNAMES       0x04
 352
 353 #define FSP_POSIX_FLAGS_ALL                     \
 354         (FSP_POSIX_FLAGS_OPEN |                 \
 355          FSP_POSIX_FLAGS_PATHNAMES |            \
 356          FSP_POSIX_FLAGS_RENAME)
 357
 358 struct vuid_cache_entry {
 359         struct auth_session_info *session_info;
 360         uint64_t vuid; /* SMB2 compat */
 361         bool read_only;
 362         uint32_t share_access;
 363 };
 364
 365 struct vuid_cache {
 366         unsigned int next_entry;
 367         struct vuid_cache_entry array[VUID_CACHE_SIZE];
 368 };
 369
 370 typedef struct {
 371         char *name;
 372         bool is_wild;
 373 } name_compare_entry;
 374
 375 struct dfree_cached_info {
 376         time_t last_dfree_time;
 377         uint64_t dfree_ret;
 378         uint64_t bsize;
 379         uint64_t dfree;
 380         uint64_t dsize;
 381 };
 382
 383 struct share_params {
 384         int service;
 385 };
 386
 387 typedef struct connection_struct {
 388         struct connection_struct *next, *prev;
 389         struct smbd_server_connection *sconn; /* can be NULL */
 390         struct smbXsrv_tcon *tcon; /* can be NULL */
 391         uint32_t cnum; /* an index passed over the wire */
 392         struct share_params *params;
 393         bool force_user;
 394         struct vuid_cache *vuid_cache;
 395         bool printer;
 396         bool ipc;
 397         bool read_only; /* Attributes for the current user of the share. */
 398         uint32_t share_access;
 399         /* Does this filesystem honor
 400            sub second timestamps on files
 401            and directories when setting time ? */
 402         enum timestamp_set_resolution ts_res;
 403         char *connectpath;
 404         char *origpath;
 405         char *cwd; /* Working directory. */
 406
 407         struct vfs_handle_struct *vfs_handles;          /* for the new plugins */
 408
 409         /*
 410          * This represents the user information on this connection. Depending
 411          * on the vuid using this tid, this might change per SMB request.
 412          */
 413         struct auth_session_info *session_info;
 414
 415         /*
 416          * If the "force group" parameter is set, this is the primary gid that
 417          * may be used in the users token, depending on the vuid using this tid.
 418          */
 419         gid_t force_group_gid;
 420
 421         uint64_t vuid; /* vuid of user who *opened* this connection, or UID_FIELD_INVALID */
 422
 423         time_t lastused;
 424         time_t lastused_count;
 425         int num_files_open;
 426         unsigned int num_smb_operations; /* Count of smb operations on this tree. */
 427         int encrypt_level;
 428         bool encrypted_tid;
 429
 430         /* Semantics requested by the client or forced by the server config. */
 431         bool case_sensitive;
 432         bool case_preserve;
 433         bool short_case_preserve;
 434
 435         /* Semantics provided by the underlying filesystem. */
 436         int fs_capabilities;
 437         /* Device number of the directory of the share mount.
 438            Used to ensure unique FileIndex returns. */
 439         SMB_DEV_T base_share_dev;
 440
 441         name_compare_entry *hide_list; /* Per-share list of files to return as hidden. */
 442         name_compare_entry *veto_list; /* Per-share list of files to veto (never show). */
 443         name_compare_entry *veto_oplock_list; /* Per-share list of files to refuse oplocks on. */
 444         name_compare_entry *aio_write_behind_list; /* Per-share list of files to use aio write behind on. */
 445         struct dfree_cached_info *dfree_info;
 446         struct trans_state *pending_trans;
 447
 448         struct rpc_pipe_client *spoolss_pipe;
 449
 450 } connection_struct;
 451
 452 struct smbd_smb2_request;
 453 struct privilege_paths;
 454
 455 struct smb_request {
 456         uint8_t cmd;
 457         uint16_t flags2;
 458         uint16_t smbpid;
 459         uint64_t mid; /* For compatibility with SMB2. */
 460         uint32_t seqnum;
 461         uint64_t vuid; /* For compatibility with SMB2. */
 462         uint32_t tid;
 463         uint8_t  wct;
 464         const uint16_t *vwv;
 465         uint16_t buflen;
 466         const uint8_t *buf;
 467         const uint8_t *inbuf;
 468
 469         /*
 470          * Async handling in the main smb processing loop is directed by
 471          * outbuf: reply_xxx routines indicate sync behaviour by putting their
 472          * reply into "outbuf". If they leave it as NULL, they take care of it
 473          * themselves, possibly later.
 474          *
 475          * If async handling is wanted, the reply_xxx routine must make sure
 476          * that it talloc_move()s the smb_req somewhere else.
 477          */
 478         uint8_t *outbuf;
 479
 480         size_t unread_bytes;
 481         bool encrypted;
 482         connection_struct *conn;
 483         struct smbd_server_connection *sconn;
 484         struct smbXsrv_connection *xconn;
 485         struct smb_perfcount_data pcd;
 486
 487         /*
 488          * Chained request handling
 489          */
 490         struct files_struct *chain_fsp;
 491
 492         /*
 493          * state information for async smb handling
 494          */
 495         void *async_priv;
 496
 497         /*
 498          * Back pointer to smb2 request.
 499          */
 500         struct smbd_smb2_request *smb2req;
 501
 502         /*
 503          * Pathnames used if request done
 504          * under privilege.
 505          */
 506         struct privilege_paths *priv_paths;
 507
 508         /*
 509          * Request list for chained requests, we're part of it.
 510          */
 511         struct smb_request **chain;
 512
 513         struct timeval request_time;
 514
 515         bool posix_pathnames;
 516 };
 517
 518 /*
 519  * Info about an alternate data stream
 520  */
 521
 522 struct stream_struct {
 523         off_t size;
 524         off_t alloc_size;
 525         char *name;
 526 };
 527
 528 /* time info */
 529 struct smb_file_time {
 530         struct timespec mtime;
 531         struct timespec atime;
 532         struct timespec ctime;
 533         struct timespec create_time;
 534 };
 535
 536 /*
 537  * smb_filename
 538  */
 539 struct smb_filename {
 540         char *base_name;
 541         char *stream_name;
 542         char *original_lcomp;
 543         uint32_t flags;
 544         SMB_STRUCT_STAT st;
 545 };
 546
 547 /*
 548  * smb_filename flags. Define in terms of the FSP_POSIX_FLAGS_XX
 549  * to keep the numeric values consistent.
 550  */
 551
 552 #define SMB_FILENAME_POSIX_PATH         FSP_POSIX_FLAGS_PATHNAMES
 553
 554 #define VFS_FIND(__fn__) while (handle->fns->__fn__##_fn==NULL) { \
 555                                 handle = handle->next; \
 556                          }
 557
 558 enum vfs_translate_direction {
 559         vfs_translate_to_unix = 0,
 560         vfs_translate_to_windows
 561 };
 562
 563 enum vfs_fallocate_flags {
 564         VFS_FALLOCATE_FL_KEEP_SIZE              = 0x0001,
 565         VFS_FALLOCATE_FL_PUNCH_HOLE             = 0x0002,
 566 };
 567
 568 /*
 569  * @VFS_COPY_CHUNK_FL_MUST_CLONE: indicates that copy_chunk_send_fn() copy must
 570  *                                be handled as a COW clone, AKA reflink.
 571  * @VFS_COPY_CHUNK_FL_MASK_ALL: all valid copychunk flags.
 572  */
 573 enum vfs_copy_chunk_flags {
 574         VFS_COPY_CHUNK_FL_MUST_CLONE            = 0x0001,
 575         VFS_COPY_CHUNK_FL_IGNORE_LOCKS          = 0x0002,
 576
 577         VFS_COPY_CHUNK_FL_MASK_ALL              =
 578                                         (VFS_COPY_CHUNK_FL_MUST_CLONE
 579                                          | VFS_COPY_CHUNK_FL_IGNORE_LOCKS),
 580 };
 581
 582 struct vfs_aio_state {
 583         int error;
 584         uint64_t duration;
 585 };
 586
 587 /*
 588     Available VFS operations. These values must be in sync with vfs_ops struct
 589     (struct vfs_fn_pointers and struct vfs_handle_pointers inside of struct vfs_ops).
 590     In particular, if new operations are added to vfs_ops, appropriate constants
 591     should be added to vfs_op_type so that order of them kept same as in vfs_ops.
 592 */
 593 struct shadow_copy_data;
 594
 595 struct vfs_fn_pointers {
 596         /* Disk operations */
 597
 598         int (*connect_fn)(struct vfs_handle_struct *handle, const char *service, const char *user);
 599         void (*disconnect_fn)(struct vfs_handle_struct *handle);
 600         uint64_t (*disk_free_fn)(struct vfs_handle_struct *handle, const char *path, uint64_t *bsize,
 601                               uint64_t *dfree, uint64_t *dsize);
 602         int (*get_quota_fn)(struct vfs_handle_struct *handle, const char *path,
 603                             enum SMB_QUOTA_TYPE qtype, unid_t id,
 604                             SMB_DISK_QUOTA *qt);
 605         int (*set_quota_fn)(struct vfs_handle_struct *handle, enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *qt);
 606         int (*get_shadow_copy_data_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, struct shadow_copy_data *shadow_copy_data, bool labels);
 607         int (*statvfs_fn)(struct vfs_handle_struct *handle, const char *path, struct vfs_statvfs_struct *statbuf);
 608         uint32_t (*fs_capabilities_fn)(struct vfs_handle_struct *handle, enum timestamp_set_resolution *p_ts_res);
 609
 610         /*
 611          * Note: that "struct dfs_GetDFSReferral *r"
 612          * needs to be a valid TALLOC_CTX
 613          */
 614         NTSTATUS (*get_dfs_referrals_fn)(struct vfs_handle_struct *handle,
 615                                          struct dfs_GetDFSReferral *r);
 616
 617         /* Directory operations */
 618
 619         DIR *(*opendir_fn)(struct vfs_handle_struct *handle,
 620                                         const struct smb_filename *smb_fname,
 621                                         const char *mask,
 622                                         uint32_t attributes);
 623         DIR *(*fdopendir_fn)(struct vfs_handle_struct *handle, files_struct *fsp, const char *mask, uint32_t attributes);
 624         struct dirent *(*readdir_fn)(struct vfs_handle_struct *handle,
 625                                          DIR *dirp,
 626                                          SMB_STRUCT_STAT *sbuf);
 627         void (*seekdir_fn)(struct vfs_handle_struct *handle, DIR *dirp, long offset);
 628         long (*telldir_fn)(struct vfs_handle_struct *handle, DIR *dirp);
 629         void (*rewind_dir_fn)(struct vfs_handle_struct *handle, DIR *dirp);
 630         int (*mkdir_fn)(struct vfs_handle_struct *handle,
 631                         const struct smb_filename *smb_fname,
 632                         mode_t mode);
 633         int (*rmdir_fn)(struct vfs_handle_struct *handle,
 634                         const struct smb_filename *smb_fname);
 635         int (*closedir_fn)(struct vfs_handle_struct *handle, DIR *dir);
 636         void (*init_search_op_fn)(struct vfs_handle_struct *handle, DIR *dirp);
 637
 638         /* File operations */
 639
 640         int (*open_fn)(struct vfs_handle_struct *handle,
 641                        struct smb_filename *smb_fname, files_struct *fsp,
 642                        int flags, mode_t mode);
 643         NTSTATUS (*create_file_fn)(struct vfs_handle_struct *handle,
 644                                    struct smb_request *req,
 645                                    uint16_t root_dir_fid,
 646                                    struct smb_filename *smb_fname,
 647                                    uint32_t access_mask,
 648                                    uint32_t share_access,
 649                                    uint32_t create_disposition,
 650                                    uint32_t create_options,
 651                                    uint32_t file_attributes,
 652                                    uint32_t oplock_request,
 653                                    struct smb2_lease *lease,
 654                                    uint64_t allocation_size,
 655                                    uint32_t private_flags,
 656                                    struct security_descriptor *sd,
 657                                    struct ea_list *ea_list,
 658                                    files_struct **result,
 659                                    int *pinfo,
 660                                    const struct smb2_create_blobs *in_context_blobs,
 661                                    struct smb2_create_blobs *out_context_blobs);
 662         int (*close_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp);
 663         ssize_t (*read_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, void *data, size_t n);
 664         ssize_t (*pread_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, void *data, size_t n, off_t offset);
 665         struct tevent_req *(*pread_send_fn)(struct vfs_handle_struct *handle,
 666                                             TALLOC_CTX *mem_ctx,
 667                                             struct tevent_context *ev,
 668                                             struct files_struct *fsp,
 669                                             void *data,
 670                                             size_t n, off_t offset);
 671         ssize_t (*pread_recv_fn)(struct tevent_req *req, struct vfs_aio_state *state);
 672         ssize_t (*write_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, const void *data, size_t n);
 673         ssize_t (*pwrite_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, const void *data, size_t n, off_t offset);
 674         struct tevent_req *(*pwrite_send_fn)(struct vfs_handle_struct *handle,
 675                                              TALLOC_CTX *mem_ctx,
 676                                              struct tevent_context *ev,
 677                                              struct files_struct *fsp,
 678                                              const void *data,
 679                                              size_t n, off_t offset);
 680         ssize_t (*pwrite_recv_fn)(struct tevent_req *req, struct vfs_aio_state *state);
 681         off_t (*lseek_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, off_t offset, int whence);
 682         ssize_t (*sendfile_fn)(struct vfs_handle_struct *handle, int tofd, files_struct *fromfsp, const DATA_BLOB *header, off_t offset, size_t count);
 683         ssize_t (*recvfile_fn)(struct vfs_handle_struct *handle, int fromfd, files_struct *tofsp, off_t offset, size_t count);
 684         int (*rename_fn)(struct vfs_handle_struct *handle,
 685                          const struct smb_filename *smb_fname_src,
 686                          const struct smb_filename *smb_fname_dst);
 687         int (*fsync_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp);
 688         struct tevent_req *(*fsync_send_fn)(struct vfs_handle_struct *handle,
 689                                             TALLOC_CTX *mem_ctx,
 690                                             struct tevent_context *ev,
 691                                             struct files_struct *fsp);
 692         int (*fsync_recv_fn)(struct tevent_req *req, struct vfs_aio_state *state);
 693         int (*stat_fn)(struct vfs_handle_struct *handle, struct smb_filename *smb_fname);
 694         int (*fstat_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, SMB_STRUCT_STAT *sbuf);
 695         int (*lstat_fn)(struct vfs_handle_struct *handle, struct smb_filename *smb_filename);
 696         uint64_t (*get_alloc_size_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, const SMB_STRUCT_STAT *sbuf);
 697         int (*unlink_fn)(struct vfs_handle_struct *handle,
 698                          const struct smb_filename *smb_fname);
 699         int (*chmod_fn)(struct vfs_handle_struct *handle,
 700                         const struct smb_filename *smb_fname,
 701                         mode_t mode);
 702         int (*fchmod_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, mode_t mode);
 703         int (*chown_fn)(struct vfs_handle_struct *handle,
 704                         const struct smb_filename *smb_fname,
 705                         uid_t uid,
 706                         gid_t gid);
 707         int (*fchown_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, uid_t uid, gid_t gid);
 708         int (*lchown_fn)(struct vfs_handle_struct *handle,
 709                         const struct smb_filename *smb_fname,
 710                         uid_t uid,
 711                         gid_t gid);
 712         int (*chdir_fn)(struct vfs_handle_struct *handle, const char *path);
 713         char *(*getwd_fn)(struct vfs_handle_struct *handle);
 714         int (*ntimes_fn)(struct vfs_handle_struct *handle,
 715                          const struct smb_filename *smb_fname,
 716                          struct smb_file_time *ft);
 717         int (*ftruncate_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, off_t offset);
 718         int (*fallocate_fn)(struct vfs_handle_struct *handle,
 719                             struct files_struct *fsp,
 720                             uint32_t mode,
 721                             off_t offset,
 722                             off_t len);
 723         bool (*lock_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, int op, off_t offset, off_t count, int type);
 724         int (*kernel_flock_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp,
 725                                uint32_t share_mode, uint32_t access_mask);
 726         int (*linux_setlease_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, int leasetype);
 727         bool (*getlock_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, off_t *poffset, off_t *pcount, int *ptype, pid_t *ppid);
 728         int (*symlink_fn)(struct vfs_handle_struct *handle, const char *oldpath, const char *newpath);
 729         int (*readlink_fn)(struct vfs_handle_struct *handle, const char *path, char *buf, size_t bufsiz);
 730         int (*link_fn)(struct vfs_handle_struct *handle, const char *oldpath, const char *newpath);
 731         int (*mknod_fn)(struct vfs_handle_struct *handle, const char *path, mode_t mode, SMB_DEV_T dev);
 732         char *(*realpath_fn)(struct vfs_handle_struct *handle, const char *path);
 733         int (*chflags_fn)(struct vfs_handle_struct *handle, const char *path, unsigned int flags);
 734         struct file_id (*file_id_create_fn)(struct vfs_handle_struct *handle,
 735                                             const SMB_STRUCT_STAT *sbuf);
 736         struct tevent_req *(*copy_chunk_send_fn)(struct vfs_handle_struct *handle,
 737                                                  TALLOC_CTX *mem_ctx,
 738                                                  struct tevent_context *ev,
 739                                                  struct files_struct *src_fsp,
 740                                                  off_t src_off,
 741                                                  struct files_struct *dest_fsp,
 742                                                  off_t dest_off,
 743                                                  off_t to_copy,
 744                                                  uint32_t flags);
 745         NTSTATUS (*copy_chunk_recv_fn)(struct vfs_handle_struct *handle,
 746                                        struct tevent_req *req,
 747                                        off_t *copied);
 748         NTSTATUS (*get_compression_fn)(struct vfs_handle_struct *handle,
 749                                        TALLOC_CTX *mem_ctx,
 750                                        struct files_struct *fsp,
 751                                        struct smb_filename *smb_fname,
 752                                        uint16_t *_compression_fmt);
 753         NTSTATUS (*set_compression_fn)(struct vfs_handle_struct *handle,
 754                                        TALLOC_CTX *mem_ctx,
 755                                        struct files_struct *fsp,
 756                                        uint16_t compression_fmt);
 757         NTSTATUS (*snap_check_path_fn)(struct vfs_handle_struct *handle,
 758                                        TALLOC_CTX *mem_ctx,
 759                                        const char *service_path,
 760                                        char **base_volume);
 761         NTSTATUS (*snap_create_fn)(struct vfs_handle_struct *handle,
 762                                    TALLOC_CTX *mem_ctx,
 763                                    const char *base_volume,
 764                                    time_t *tstamp,
 765                                    bool rw,
 766                                    char **base_path,
 767                                    char **snap_path);
 768         NTSTATUS (*snap_delete_fn)(struct vfs_handle_struct *handle,
 769                                    TALLOC_CTX *mem_ctx,
 770                                    char *base_path,
 771                                    char *snap_path);
 772
 773         NTSTATUS (*streaminfo_fn)(struct vfs_handle_struct *handle,
 774                                   struct files_struct *fsp,
 775                                   const struct smb_filename *smb_fname,
 776                                   TALLOC_CTX *mem_ctx,
 777                                   unsigned int *num_streams,
 778                                   struct stream_struct **streams);
 779
 780         int (*get_real_filename_fn)(struct vfs_handle_struct *handle,
 781                                     const char *path,
 782                                     const char *name,
 783                                     TALLOC_CTX *mem_ctx,
 784                                     char **found_name);
 785
 786         const char *(*connectpath_fn)(struct vfs_handle_struct *handle,
 787                                       const char *filename);
 788
 789         NTSTATUS (*brl_lock_windows_fn)(struct vfs_handle_struct *handle,
 790                                         struct byte_range_lock *br_lck,
 791                                         struct lock_struct *plock,
 792                                         bool blocking_lock);
 793
 794         bool (*brl_unlock_windows_fn)(struct vfs_handle_struct *handle,
 795                                       struct messaging_context *msg_ctx,
 796                                       struct byte_range_lock *br_lck,
 797                                       const struct lock_struct *plock);
 798
 799         bool (*brl_cancel_windows_fn)(struct vfs_handle_struct *handle,
 800                                       struct byte_range_lock *br_lck,
 801                                       struct lock_struct *plock);
 802
 803         bool (*strict_lock_fn)(struct vfs_handle_struct *handle,
 804                                struct files_struct *fsp,
 805                                struct lock_struct *plock);
 806
 807         void (*strict_unlock_fn)(struct vfs_handle_struct *handle,
 808                                  struct files_struct *fsp,
 809                                  struct lock_struct *plock);
 810
 811         NTSTATUS (*translate_name_fn)(struct vfs_handle_struct *handle,
 812                                       const char *name,
 813                                       enum vfs_translate_direction direction,
 814                                       TALLOC_CTX *mem_ctx,
 815                                       char **mapped_name);
 816
 817         NTSTATUS (*fsctl_fn)(struct vfs_handle_struct *handle,
 818                              struct files_struct *fsp,
 819                              TALLOC_CTX *ctx,
 820                              uint32_t function,
 821                              uint16_t req_flags,
 822                              const uint8_t *_in_data,
 823                              uint32_t in_len,
 824                              uint8_t **_out_data,
 825                              uint32_t max_out_len,
 826                              uint32_t *out_len);
 827
 828         NTSTATUS (*get_dos_attributes_fn)(struct vfs_handle_struct *handle,
 829                                           struct smb_filename *smb_fname,
 830                                           uint32_t *dosmode);
 831
 832         NTSTATUS (*fget_dos_attributes_fn)(struct vfs_handle_struct *handle,
 833                                            struct files_struct *fsp,
 834                                            uint32_t *dosmode);
 835
 836         NTSTATUS (*set_dos_attributes_fn)(struct vfs_handle_struct *handle,
 837                                           const struct smb_filename *smb_fname,
 838                                           uint32_t dosmode);
 839
 840         NTSTATUS (*fset_dos_attributes_fn)(struct vfs_handle_struct *hande,
 841                                            struct files_struct *fsp,
 842                                            uint32_t dosmode);
 843
 844         /* NT ACL operations. */
 845
 846         NTSTATUS (*fget_nt_acl_fn)(struct vfs_handle_struct *handle,
 847                                    struct files_struct *fsp,
 848                                    uint32_t security_info,
 849                                    TALLOC_CTX *mem_ctx,
 850                                    struct security_descriptor **ppdesc);
 851         NTSTATUS (*get_nt_acl_fn)(struct vfs_handle_struct *handle,
 852                                   const struct smb_filename *smb_fname,
 853                                   uint32_t security_info,
 854                                    TALLOC_CTX *mem_ctx,
 855                                   struct security_descriptor **ppdesc);
 856         NTSTATUS (*fset_nt_acl_fn)(struct vfs_handle_struct *handle,
 857                                    struct files_struct *fsp,
 858                                    uint32_t security_info_sent,
 859                                    const struct security_descriptor *psd);
 860
 861         NTSTATUS (*audit_file_fn)(struct vfs_handle_struct *handle,
 862                                   struct smb_filename *file,
 863                                   struct security_acl *sacl,
 864                                   uint32_t access_requested,
 865                                   uint32_t access_denied);
 866
 867         /* POSIX ACL operations. */
 868
 869         int (*chmod_acl_fn)(struct vfs_handle_struct *handle,
 870                                         const struct smb_filename *smb_fname,
 871                                         mode_t mode);
 872         int (*fchmod_acl_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, mode_t mode);
 873
 874         SMB_ACL_T (*sys_acl_get_file_fn)(struct vfs_handle_struct *handle,
 875                                          const struct smb_filename *smb_fname,
 876                                          SMB_ACL_TYPE_T type,
 877                                          TALLOC_CTX *mem_ctx);
 878         SMB_ACL_T (*sys_acl_get_fd_fn)(struct vfs_handle_struct *handle,
 879                                        struct files_struct *fsp,
 880                                        TALLOC_CTX *mem_ctx);
 881         int (*sys_acl_blob_get_file_fn)(struct vfs_handle_struct *handle,
 882                                         const struct smb_filename *smb_fname,
 883                                         TALLOC_CTX *mem_ctx,
 884                                         char **blob_description,
 885                                         DATA_BLOB *blob);
 886         int (*sys_acl_blob_get_fd_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp,
 887                                       TALLOC_CTX *mem_ctx, char **blob_description,
 888                                       DATA_BLOB *blob);
 889         int (*sys_acl_set_file_fn)(struct vfs_handle_struct *handle,
 890                                         const struct smb_filename *smb_fname,
 891                                         SMB_ACL_TYPE_T acltype,
 892                                         SMB_ACL_T theacl);
 893         int (*sys_acl_set_fd_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, SMB_ACL_T theacl);
 894         int (*sys_acl_delete_def_file_fn)(struct vfs_handle_struct *handle,
 895                                         const struct smb_filename *smb_fname);
 896
 897         /* EA operations. */
 898         ssize_t (*getxattr_fn)(struct vfs_handle_struct *handle,
 899                                         const struct smb_filename *smb_fname,
 900                                         const char *name,
 901                                         void *value,
 902                                         size_t size);
 903         ssize_t (*fgetxattr_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, const char *name, void *value, size_t size);
 904         ssize_t (*listxattr_fn)(struct vfs_handle_struct *handle,
 905                                         const struct smb_filename *smb_fname,
 906                                         char *list,
 907                                         size_t size);
 908         ssize_t (*flistxattr_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, char *list, size_t size);
 909         int (*removexattr_fn)(struct vfs_handle_struct *handle,
 910                                         const struct smb_filename *smb_fname,
 911                                         const char *name);
 912         int (*fremovexattr_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, const char *name);
 913         int (*setxattr_fn)(struct vfs_handle_struct *handle,
 914                                         const struct smb_filename *smb_fname,
 915                                         const char *name,
 916                                         const void *value,
 917                                         size_t size,
 918                                         int flags);
 919         int (*fsetxattr_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, const char *name, const void *value, size_t size, int flags);
 920
 921         /* aio operations */
 922         bool (*aio_force_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp);
 923
 924         /* durable handle operations */
 925         NTSTATUS (*durable_cookie_fn)(struct vfs_handle_struct *handle,
 926                                       struct files_struct *fsp,
 927                                       TALLOC_CTX *mem_ctx,
 928                                       DATA_BLOB *cookie);
 929         NTSTATUS (*durable_disconnect_fn)(struct vfs_handle_struct *handle,
 930                                           struct files_struct *fsp,
 931                                           const DATA_BLOB old_cookie,
 932                                           TALLOC_CTX *mem_ctx,
 933                                           DATA_BLOB *new_cookie);
 934         NTSTATUS (*durable_reconnect_fn)(struct vfs_handle_struct *handle,
 935                                          struct smb_request *smb1req,
 936                                          struct smbXsrv_open *op,
 937                                          const DATA_BLOB old_cookie,
 938                                          TALLOC_CTX *mem_ctx,
 939                                          struct files_struct **fsp,
 940                                          DATA_BLOB *new_cookie);
 941
 942         NTSTATUS (*readdir_attr_fn)(struct vfs_handle_struct *handle,
 943                                     const struct smb_filename *fname,
 944                                     TALLOC_CTX *mem_ctx,
 945                                     struct readdir_attr_data **attr_data);
 946 };
 947
 948 /*
 949     VFS operation description. Each VFS module registers an array of vfs_op_tuple to VFS subsystem,
 950     which describes all operations this module is willing to intercept.
 951     VFS subsystem initializes then the conn->vfs_ops and conn->vfs_opaque_ops structs
 952     using this information.
 953 */
 954
 955 typedef struct vfs_handle_struct {
 956         struct vfs_handle_struct  *next, *prev;
 957         const char *param;
 958         struct connection_struct *conn;
 959         const struct vfs_fn_pointers *fns;
 960         void *data;
 961         void (*free_data)(void **data);
 962 } vfs_handle_struct;
 963
 964
 965 typedef struct vfs_statvfs_struct {
 966         /* For undefined recommended transfer size return -1 in that field */
 967         uint32_t OptimalTransferSize;  /* bsize on some os, iosize on other os */
 968         uint32_t BlockSize;
 969
 970         /*
 971          The next three fields are in terms of the block size.
 972          (above). If block size is unknown, 4096 would be a
 973          reasonable block size for a server to report.
 974          Note that returning the blocks/blocksavail removes need
 975          to make a second call (to QFSInfo level 0x103 to get this info.
 976          UserBlockAvail is typically less than or equal to BlocksAvail,
 977          if no distinction is made return the same value in each.
 978         */
 979
 980         uint64_t TotalBlocks;
 981         uint64_t BlocksAvail;       /* bfree */
 982         uint64_t UserBlocksAvail;   /* bavail */
 983
 984         /* For undefined Node fields or FSID return -1 */
 985         uint64_t TotalFileNodes;
 986         uint64_t FreeFileNodes;
 987         uint64_t FsIdentifier;   /* fsid */
 988         /* NB Namelen comes from FILE_SYSTEM_ATTRIBUTE_INFO call */
 989         /* NB flags can come from FILE_SYSTEM_DEVICE_INFO call   */
 990
 991         int FsCapabilities;
 992 } vfs_statvfs_struct;
 993
 994 /* Add a new FSP extension of the given type. Returns a pointer to the
 995  * extenstion data.
 996  */
 997 #define VFS_ADD_FSP_EXTENSION(handle, fsp, type, destroy_fn)            \
 998     vfs_add_fsp_extension_notype(handle, (fsp), sizeof(type), (destroy_fn))
 999
1000 /* Return a pointer to the existing FSP extension data. */
1001 #define VFS_FETCH_FSP_EXTENSION(handle, fsp) \
1002     vfs_fetch_fsp_extension(handle, (fsp))
1003
1004 /* Return the talloc context associated with an FSP extension. */
1005 #define VFS_MEMCTX_FSP_EXTENSION(handle, fsp) \
1006     vfs_memctx_fsp_extension(handle, (fsp))
1007
1008 /* Remove and destroy an FSP extension. */
1009 #define VFS_REMOVE_FSP_EXTENSION(handle, fsp) \
1010     vfs_remove_fsp_extension((handle), (fsp))
1011
1012 #define SMB_VFS_HANDLE_GET_DATA(handle, datap, type, ret) { \
1013         if (!(handle)||((datap=(type *)(handle)->data)==NULL)) { \
1014                 DEBUG(0,("%s() failed to get vfs_handle->data!\n",__FUNCTION__)); \
1015                 ret; \
1016         } \
1017 }
1018
1019 #define SMB_VFS_HANDLE_SET_DATA(handle, datap, free_fn, type, ret) { \
1020         if (!(handle)) { \
1021                 DEBUG(0,("%s() failed to set handle->data!\n",__FUNCTION__)); \
1022                 ret; \
1023         } else { \
1024                 if ((handle)->free_data) { \
1025                         (handle)->free_data(&(handle)->data); \
1026                 } \
1027                 (handle)->data = (void *)datap; \
1028                 (handle)->free_data = free_fn; \
1029         } \
1030 }
1031
1032 #define SMB_VFS_HANDLE_FREE_DATA(handle) { \
1033         if ((handle) && (handle)->free_data) { \
1034                 (handle)->free_data(&(handle)->data); \
1035         } \
1036 }
1037
1038 /* Check whether module-specific data handle was already allocated or not */
1039 #define SMB_VFS_HANDLE_TEST_DATA(handle)  ( !(handle) || !(handle)->data ? False : True )
1040
1041 #define SMB_VFS_OP(x) ((void *) x)
1042
1043 #define DEFAULT_VFS_MODULE_NAME "/[Default VFS]/"
1044
1045 #include "vfs_macros.h"
1046
1047 int smb_vfs_call_connect(struct vfs_handle_struct *handle,
1048                          const char *service, const char *user);
1049 void smb_vfs_call_disconnect(struct vfs_handle_struct *handle);
1050 uint64_t smb_vfs_call_disk_free(struct vfs_handle_struct *handle,
1051                                 const char *path, uint64_t *bsize,
1052                                 uint64_t *dfree, uint64_t *dsize);
1053 int smb_vfs_call_get_quota(struct vfs_handle_struct *handle, const char *path,
1054                            enum SMB_QUOTA_TYPE qtype, unid_t id,
1055                            SMB_DISK_QUOTA *qt);
1056 int smb_vfs_call_set_quota(struct vfs_handle_struct *handle,
1057                            enum SMB_QUOTA_TYPE qtype, unid_t id,
1058                            SMB_DISK_QUOTA *qt);
1059 int smb_vfs_call_get_shadow_copy_data(struct vfs_handle_struct *handle,
1060                                       struct files_struct *fsp,
1061                                       struct shadow_copy_data *shadow_copy_data,
1062                                       bool labels);
1063 int smb_vfs_call_statvfs(struct vfs_handle_struct *handle, const char *path,
1064                          struct vfs_statvfs_struct *statbuf);
1065 uint32_t smb_vfs_call_fs_capabilities(struct vfs_handle_struct *handle,
1066                                       enum timestamp_set_resolution *p_ts_res);
1067 /*
1068  * Note: that "struct dfs_GetDFSReferral *r" needs to be a valid TALLOC_CTX
1069  */
1070 NTSTATUS smb_vfs_call_get_dfs_referrals(struct vfs_handle_struct *handle,
1071                                         struct dfs_GetDFSReferral *r);
1072 DIR *smb_vfs_call_opendir(struct vfs_handle_struct *handle,
1073                         const struct smb_filename *smb_fname,
1074                         const char *mask,
1075                         uint32_t attributes);
1076 DIR *smb_vfs_call_fdopendir(struct vfs_handle_struct *handle,
1077                                         struct files_struct *fsp,
1078                                         const char *mask,
1079                                         uint32_t attributes);
1080 struct dirent *smb_vfs_call_readdir(struct vfs_handle_struct *handle,
1081                                         DIR *dirp,
1082                                         SMB_STRUCT_STAT *sbuf);
1083 void smb_vfs_call_seekdir(struct vfs_handle_struct *handle,
1084                           DIR *dirp, long offset);
1085 long smb_vfs_call_telldir(struct vfs_handle_struct *handle,
1086                           DIR *dirp);
1087 void smb_vfs_call_rewind_dir(struct vfs_handle_struct *handle,
1088                              DIR *dirp);
1089 int smb_vfs_call_mkdir(struct vfs_handle_struct *handle,
1090                         const struct smb_filename *smb_fname,
1091                         mode_t mode);
1092 int smb_vfs_call_rmdir(struct vfs_handle_struct *handle,
1093                         const struct smb_filename *smb_fname);
1094 int smb_vfs_call_closedir(struct vfs_handle_struct *handle,
1095                           DIR *dir);
1096 void smb_vfs_call_init_search_op(struct vfs_handle_struct *handle,
1097                                  DIR *dirp);
1098 int smb_vfs_call_open(struct vfs_handle_struct *handle,
1099                       struct smb_filename *smb_fname, struct files_struct *fsp,
1100                       int flags, mode_t mode);
1101 NTSTATUS smb_vfs_call_create_file(struct vfs_handle_struct *handle,
1102                                   struct smb_request *req,
1103                                   uint16_t root_dir_fid,
1104                                   struct smb_filename *smb_fname,
1105                                   uint32_t access_mask,
1106                                   uint32_t share_access,
1107                                   uint32_t create_disposition,
1108                                   uint32_t create_options,
1109                                   uint32_t file_attributes,
1110                                   uint32_t oplock_request,
1111                                   struct smb2_lease *lease,
1112                                   uint64_t allocation_size,
1113                                   uint32_t private_flags,
1114                                   struct security_descriptor *sd,
1115                                   struct ea_list *ea_list,
1116                                   files_struct **result,
1117                                   int *pinfo,
1118                                   const struct smb2_create_blobs *in_context_blobs,
1119                                   struct smb2_create_blobs *out_context_blobs);
1120 int smb_vfs_call_close(struct vfs_handle_struct *handle,
1121                        struct files_struct *fsp);
1122 ssize_t smb_vfs_call_read(struct vfs_handle_struct *handle,
1123                           struct files_struct *fsp, void *data, size_t n);
1124 ssize_t smb_vfs_call_pread(struct vfs_handle_struct *handle,
1125                            struct files_struct *fsp, void *data, size_t n,
1126                            off_t offset);
1127 struct tevent_req *smb_vfs_call_pread_send(struct vfs_handle_struct *handle,
1128                                            TALLOC_CTX *mem_ctx,
1129                                            struct tevent_context *ev,
1130                                            struct files_struct *fsp,
1131                                            void *data,
1132                                            size_t n, off_t offset);
1133 ssize_t SMB_VFS_PREAD_RECV(struct tevent_req *req, struct vfs_aio_state *state);
1134
1135 ssize_t smb_vfs_call_write(struct vfs_handle_struct *handle,
1136                            struct files_struct *fsp, const void *data,
1137                            size_t n);
1138 ssize_t smb_vfs_call_pwrite(struct vfs_handle_struct *handle,
1139                             struct files_struct *fsp, const void *data,
1140                             size_t n, off_t offset);
1141 struct tevent_req *smb_vfs_call_pwrite_send(struct vfs_handle_struct *handle,
1142                                             TALLOC_CTX *mem_ctx,
1143                                             struct tevent_context *ev,
1144                                             struct files_struct *fsp,
1145                                             const void *data,
1146                                             size_t n, off_t offset);
1147 ssize_t SMB_VFS_PWRITE_RECV(struct tevent_req *req, struct vfs_aio_state *state);
1148
1149 off_t smb_vfs_call_lseek(struct vfs_handle_struct *handle,
1150                              struct files_struct *fsp, off_t offset,
1151                              int whence);
1152 ssize_t smb_vfs_call_sendfile(struct vfs_handle_struct *handle, int tofd,
1153                               files_struct *fromfsp, const DATA_BLOB *header,
1154                               off_t offset, size_t count);
1155 ssize_t smb_vfs_call_recvfile(struct vfs_handle_struct *handle, int fromfd,
1156                               files_struct *tofsp, off_t offset,
1157                               size_t count);
1158 int smb_vfs_call_rename(struct vfs_handle_struct *handle,
1159                         const struct smb_filename *smb_fname_src,
1160                         const struct smb_filename *smb_fname_dst);
1161 int smb_vfs_call_fsync(struct vfs_handle_struct *handle,
1162                        struct files_struct *fsp);
1163
1164 struct tevent_req *smb_vfs_call_fsync_send(struct vfs_handle_struct *handle,
1165                                            TALLOC_CTX *mem_ctx,
1166                                            struct tevent_context *ev,
1167                                            struct files_struct *fsp);
1168 int SMB_VFS_FSYNC_RECV(struct tevent_req *req, struct vfs_aio_state *state);
1169
1170 int smb_vfs_call_stat(struct vfs_handle_struct *handle,
1171                       struct smb_filename *smb_fname);
1172 int smb_vfs_call_fstat(struct vfs_handle_struct *handle,
1173                        struct files_struct *fsp, SMB_STRUCT_STAT *sbuf);
1174 int smb_vfs_call_lstat(struct vfs_handle_struct *handle,
1175                        struct smb_filename *smb_filename);
1176 uint64_t smb_vfs_call_get_alloc_size(struct vfs_handle_struct *handle,
1177                                      struct files_struct *fsp,
1178                                      const SMB_STRUCT_STAT *sbuf);
1179 int smb_vfs_call_unlink(struct vfs_handle_struct *handle,
1180                         const struct smb_filename *smb_fname);
1181 int smb_vfs_call_chmod(struct vfs_handle_struct *handle,
1182                         const struct smb_filename *smb_fname,
1183                         mode_t mode);
1184 int smb_vfs_call_fchmod(struct vfs_handle_struct *handle,
1185                         struct files_struct *fsp, mode_t mode);
1186 int smb_vfs_call_chown(struct vfs_handle_struct *handle,
1187                         const struct smb_filename *smb_fname,
1188                         uid_t uid,
1189                         gid_t gid);
1190 int smb_vfs_call_fchown(struct vfs_handle_struct *handle,
1191                         struct files_struct *fsp, uid_t uid, gid_t gid);
1192 int smb_vfs_call_lchown(struct vfs_handle_struct *handle,
1193                         const struct smb_filename *smb_fname,
1194                         uid_t uid,
1195                         gid_t gid);
1196 int smb_vfs_call_chdir(struct vfs_handle_struct *handle, const char *path);
1197 char *smb_vfs_call_getwd(struct vfs_handle_struct *handle);
1198 int smb_vfs_call_ntimes(struct vfs_handle_struct *handle,
1199                         const struct smb_filename *smb_fname,
1200                         struct smb_file_time *ft);
1201 int smb_vfs_call_ftruncate(struct vfs_handle_struct *handle,
1202                            struct files_struct *fsp, off_t offset);
1203 int smb_vfs_call_fallocate(struct vfs_handle_struct *handle,
1204                            struct files_struct *fsp,
1205                            uint32_t mode,
1206                            off_t offset,
1207                            off_t len);
1208 bool smb_vfs_call_lock(struct vfs_handle_struct *handle,
1209                        struct files_struct *fsp, int op, off_t offset,
1210                        off_t count, int type);
1211 int smb_vfs_call_kernel_flock(struct vfs_handle_struct *handle,
1212                               struct files_struct *fsp, uint32_t share_mode,
1213                               uint32_t access_mask);
1214 int smb_vfs_call_linux_setlease(struct vfs_handle_struct *handle,
1215                                 struct files_struct *fsp, int leasetype);
1216 bool smb_vfs_call_getlock(struct vfs_handle_struct *handle,
1217                           struct files_struct *fsp, off_t *poffset,
1218                           off_t *pcount, int *ptype, pid_t *ppid);
1219 int smb_vfs_call_symlink(struct vfs_handle_struct *handle, const char *oldpath,
1220                          const char *newpath);
1221 int smb_vfs_call_readlink(struct vfs_handle_struct *handle,
1222                           const char *path, char *buf, size_t bufsiz);
1223 int smb_vfs_call_link(struct vfs_handle_struct *handle, const char *oldpath,
1224                       const char *newpath);
1225 int smb_vfs_call_mknod(struct vfs_handle_struct *handle, const char *path,
1226                        mode_t mode, SMB_DEV_T dev);
1227 char *smb_vfs_call_realpath(struct vfs_handle_struct *handle, const char *path);
1228 int smb_vfs_call_chflags(struct vfs_handle_struct *handle, const char *path,
1229                          unsigned int flags);
1230 struct file_id smb_vfs_call_file_id_create(struct vfs_handle_struct *handle,
1231                                            const SMB_STRUCT_STAT *sbuf);
1232 NTSTATUS smb_vfs_call_streaminfo(struct vfs_handle_struct *handle,
1233                                  struct files_struct *fsp,
1234                                  const struct smb_filename *smb_fname,
1235                                  TALLOC_CTX *mem_ctx,
1236                                  unsigned int *num_streams,
1237                                  struct stream_struct **streams);
1238 int smb_vfs_call_get_real_filename(struct vfs_handle_struct *handle,
1239                                    const char *path, const char *name,
1240                                    TALLOC_CTX *mem_ctx, char **found_name);
1241 const char *smb_vfs_call_connectpath(struct vfs_handle_struct *handle,
1242                                      const char *filename);
1243 NTSTATUS smb_vfs_call_brl_lock_windows(struct vfs_handle_struct *handle,
1244                                        struct byte_range_lock *br_lck,
1245                                        struct lock_struct *plock,
1246                                        bool blocking_lock);
1247 bool smb_vfs_call_brl_unlock_windows(struct vfs_handle_struct *handle,
1248                                      struct messaging_context *msg_ctx,
1249                                      struct byte_range_lock *br_lck,
1250                                      const struct lock_struct *plock);
1251 bool smb_vfs_call_brl_cancel_windows(struct vfs_handle_struct *handle,
1252                                      struct byte_range_lock *br_lck,
1253                                      struct lock_struct *plock);
1254 bool smb_vfs_call_strict_lock(struct vfs_handle_struct *handle,
1255                               struct files_struct *fsp,
1256                               struct lock_struct *plock);
1257 void smb_vfs_call_strict_unlock(struct vfs_handle_struct *handle,
1258                                 struct files_struct *fsp,
1259                                 struct lock_struct *plock);
1260 NTSTATUS smb_vfs_call_translate_name(struct vfs_handle_struct *handle,
1261                                      const char *name,
1262                                      enum vfs_translate_direction direction,
1263                                      TALLOC_CTX *mem_ctx,
1264                                      char **mapped_name);
1265 NTSTATUS smb_vfs_call_fsctl(struct vfs_handle_struct *handle,
1266                             struct files_struct *fsp,
1267                             TALLOC_CTX *ctx,
1268                             uint32_t function,
1269                             uint16_t req_flags,
1270                             const uint8_t *_in_data,
1271                             uint32_t in_len,
1272                             uint8_t **_out_data,
1273                             uint32_t max_out_len,
1274                             uint32_t *out_len);
1275 NTSTATUS smb_vfs_call_get_dos_attributes(struct vfs_handle_struct *handle,
1276                                          struct smb_filename *smb_fname,
1277                                          uint32_t *dosmode);
1278 NTSTATUS smb_vfs_call_fget_dos_attributes(struct vfs_handle_struct *handle,
1279                                           struct files_struct *fsp,
1280                                           uint32_t *dosmode);
1281 NTSTATUS smb_vfs_call_set_dos_attributes(struct vfs_handle_struct *handle,
1282                                          const struct smb_filename *smb_fname,
1283                                          uint32_t dosmode);
1284 NTSTATUS smb_vfs_call_fset_dos_attributes(struct vfs_handle_struct *handle,
1285                                           struct files_struct *fsp,
1286                                           uint32_t dosmode);
1287 struct tevent_req *smb_vfs_call_copy_chunk_send(struct vfs_handle_struct *handle,
1288                                                 TALLOC_CTX *mem_ctx,
1289                                                 struct tevent_context *ev,
1290                                                 struct files_struct *src_fsp,
1291                                                 off_t src_off,
1292                                                 struct files_struct *dest_fsp,
1293                                                 off_t dest_off,
1294                                                 off_t num,
1295                                                 uint32_t flags);
1296 NTSTATUS smb_vfs_call_copy_chunk_recv(struct vfs_handle_struct *handle,
1297                                       struct tevent_req *req,
1298                                       off_t *copied);
1299 NTSTATUS smb_vfs_call_get_compression(struct vfs_handle_struct *handle,
1300                                       TALLOC_CTX *mem_ctx,
1301                                       struct files_struct *fsp,
1302                                       struct smb_filename *smb_fname,
1303                                       uint16_t *_compression_fmt);
1304 NTSTATUS smb_vfs_call_set_compression(struct vfs_handle_struct *handle,
1305                                       TALLOC_CTX *mem_ctx,
1306                                       struct files_struct *fsp,
1307                                       uint16_t compression_fmt);
1308 NTSTATUS smb_vfs_call_snap_check_path(vfs_handle_struct *handle,
1309                                       TALLOC_CTX *mem_ctx,
1310                                       const char *service_path,
1311                                       char **base_volume);
1312 NTSTATUS smb_vfs_call_snap_create(struct vfs_handle_struct *handle,
1313                                   TALLOC_CTX *mem_ctx,
1314                                   const char *base_volume,
1315                                   time_t *tstamp,
1316                                   bool rw,
1317                                   char **base_path,
1318                                   char **snap_path);
1319 NTSTATUS smb_vfs_call_snap_delete(struct vfs_handle_struct *handle,
1320                                   TALLOC_CTX *mem_ctx,
1321                                   char *base_path,
1322                                   char *snap_path);
1323 NTSTATUS smb_vfs_call_fget_nt_acl(struct vfs_handle_struct *handle,
1324                                   struct files_struct *fsp,
1325                                   uint32_t security_info,
1326                                   TALLOC_CTX *mem_ctx,
1327                                   struct security_descriptor **ppdesc);
1328 NTSTATUS smb_vfs_call_get_nt_acl(struct vfs_handle_struct *handle,
1329                                  const struct smb_filename *smb_fname,
1330                                  uint32_t security_info,
1331                                  TALLOC_CTX *mem_ctx,
1332                                  struct security_descriptor **ppdesc);
1333 NTSTATUS smb_vfs_call_fset_nt_acl(struct vfs_handle_struct *handle,
1334                                   struct files_struct *fsp,
1335                                   uint32_t security_info_sent,
1336                                   const struct security_descriptor *psd);
1337 NTSTATUS smb_vfs_call_audit_file(struct vfs_handle_struct *handle,
1338                                  struct smb_filename *file,
1339                                  struct security_acl *sacl,
1340                                  uint32_t access_requested,
1341                                  uint32_t access_denied);
1342 int smb_vfs_call_chmod_acl(struct vfs_handle_struct *handle,
1343                                 const struct smb_filename *file,
1344                                 mode_t mode);
1345 int smb_vfs_call_fchmod_acl(struct vfs_handle_struct *handle,
1346                             struct files_struct *fsp, mode_t mode);
1347 SMB_ACL_T smb_vfs_call_sys_acl_get_file(struct vfs_handle_struct *handle,
1348                                         const struct smb_filename *smb_fname,
1349                                         SMB_ACL_TYPE_T type,
1350                                         TALLOC_CTX *mem_ctx);
1351 SMB_ACL_T smb_vfs_call_sys_acl_get_fd(struct vfs_handle_struct *handle,
1352                                       struct files_struct *fsp,
1353                                       TALLOC_CTX *mem_ctx);
1354 int smb_vfs_call_sys_acl_blob_get_file(struct vfs_handle_struct *handle,
1355                                        const struct smb_filename *smb_fname,
1356                                        TALLOC_CTX *mem_ctx,
1357                                        char **blob_description,
1358                                        DATA_BLOB *blob);
1359 int smb_vfs_call_sys_acl_blob_get_fd(struct vfs_handle_struct *handle,
1360                                      struct files_struct *fsp,
1361                                      TALLOC_CTX *mem_ctx,
1362                                      char **blob_description,
1363                                      DATA_BLOB *blob);
1364 int smb_vfs_call_sys_acl_set_file(struct vfs_handle_struct *handle,
1365                                 const struct smb_filename *smb_fname,
1366                                 SMB_ACL_TYPE_T acltype,
1367                                 SMB_ACL_T theacl);
1368 int smb_vfs_call_sys_acl_set_fd(struct vfs_handle_struct *handle,
1369                                 struct files_struct *fsp, SMB_ACL_T theacl);
1370 int smb_vfs_call_sys_acl_delete_def_file(struct vfs_handle_struct *handle,
1371                                 const struct smb_filename *smb_fname);
1372 ssize_t smb_vfs_call_getxattr(struct vfs_handle_struct *handle,
1373                                 const struct smb_filename *smb_fname,
1374                                 const char *name,
1375                                 void *value,
1376                                 size_t size);
1377 ssize_t smb_vfs_call_fgetxattr(struct vfs_handle_struct *handle,
1378                                struct files_struct *fsp, const char *name,
1379                                void *value, size_t size);
1380 ssize_t smb_vfs_call_listxattr(struct vfs_handle_struct *handle,
1381                                 const struct smb_filename *smb_fname,
1382                                 char *list,
1383                                 size_t size);
1384 ssize_t smb_vfs_call_llistxattr(struct vfs_handle_struct *handle,
1385                                 const char *path, char *list, size_t size);
1386 ssize_t smb_vfs_call_flistxattr(struct vfs_handle_struct *handle,
1387                                 struct files_struct *fsp, char *list,
1388                                 size_t size);
1389 int smb_vfs_call_removexattr(struct vfs_handle_struct *handle,
1390                                 const struct smb_filename *smb_fname,
1391                                 const char *name);
1392 int smb_vfs_call_fremovexattr(struct vfs_handle_struct *handle,
1393                               struct files_struct *fsp, const char *name);
1394 int smb_vfs_call_setxattr(struct vfs_handle_struct *handle,
1395                                 const struct smb_filename *smb_fname,
1396                                 const char *name,
1397                                 const void *value,
1398                                 size_t size,
1399                                 int flags);
1400 int smb_vfs_call_lsetxattr(struct vfs_handle_struct *handle, const char *path,
1401                            const char *name, const void *value, size_t size,
1402                            int flags);
1403 int smb_vfs_call_fsetxattr(struct vfs_handle_struct *handle,
1404                            struct files_struct *fsp, const char *name,
1405                            const void *value, size_t size, int flags);
1406 bool smb_vfs_call_aio_force(struct vfs_handle_struct *handle,
1407                             struct files_struct *fsp);
1408 bool smb_vfs_call_is_offline(struct vfs_handle_struct *handle,
1409                              const struct smb_filename *fname,
1410                              SMB_STRUCT_STAT *sbuf);
1411 int smb_vfs_call_set_offline(struct vfs_handle_struct *handle,
1412                              const struct smb_filename *fname);
1413 NTSTATUS smb_vfs_call_durable_cookie(struct vfs_handle_struct *handle,
1414                                      struct files_struct *fsp,
1415                                      TALLOC_CTX *mem_ctx,
1416                                      DATA_BLOB *cookie);
1417 NTSTATUS smb_vfs_call_durable_disconnect(struct vfs_handle_struct *handle,
1418                                          struct files_struct *fsp,
1419                                          const DATA_BLOB old_cookie,
1420                                          TALLOC_CTX *mem_ctx,
1421                                          DATA_BLOB *new_cookie);
1422 NTSTATUS smb_vfs_call_durable_reconnect(struct vfs_handle_struct *handle,
1423                                         struct smb_request *smb1req,
1424                                         struct smbXsrv_open *op,
1425                                         const DATA_BLOB old_cookie,
1426                                         TALLOC_CTX *mem_ctx,
1427                                         struct files_struct **fsp,
1428                                         DATA_BLOB *new_cookie);
1429 NTSTATUS smb_vfs_call_readdir_attr(struct vfs_handle_struct *handle,
1430                                    const struct smb_filename *fname,
1431                                    TALLOC_CTX *mem_ctx,
1432                                    struct readdir_attr_data **attr_data);
1433
1434 NTSTATUS smb_register_vfs(int version, const char *name,
1435                           const struct vfs_fn_pointers *fns);
1436 void *vfs_add_fsp_extension_notype(vfs_handle_struct *handle,
1437                                    files_struct *fsp, size_t ext_size,
1438                                    void (*destroy_fn)(void *p_data));
1439 void vfs_remove_fsp_extension(vfs_handle_struct *handle, files_struct *fsp);
1440 void vfs_remove_all_fsp_extensions(struct files_struct *fsp);
1441 void *vfs_memctx_fsp_extension(vfs_handle_struct *handle, files_struct *fsp);
1442 void *vfs_fetch_fsp_extension(vfs_handle_struct *handle, files_struct *fsp);
1443
1444 void smb_vfs_assert_all_fns(const struct vfs_fn_pointers* fns,
1445                             const char *module);
1446
1447 #endif /* _VFS_H */