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
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.
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.
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/>.
23 This work was sponsored by Optifacio Software Services, Inc.
29 /* Avoid conflict with an AIX include file */
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...
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
45 * If you change anything here, please also update modules/vfs_full_audit.c.
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
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 #define SMB_VFS_INTERFACE_VERSION 29
148 All intercepted VFS operations must be declared as static functions inside module source
149 in order to keep smbd namespace unpolluted. See source of audit, extd_audit, fake_perms and recycle
150 example VFS modules for more details.
153 /* VFS operations structure */
155 struct vfs_handle_struct;
156 struct connection_struct;
158 struct security_descriptor;
159 struct vfs_statvfs_struct;
162 struct smb_file_time;
163 struct blocking_lock_record;
165 struct dfs_GetDFSReferral;
167 typedef union unid_t {
175 uint64_t position_information;
177 uint32 private_options; /* NT Create options, but we only look at
178 * NTCREATEX_OPTIONS_PRIVATE_DENY_DOS and
179 * NTCREATEX_OPTIONS_PRIVATE_DENY_FCB and
180 * NTCREATEX_OPTIONS_PRIVATE_DELETE_ON_CLOSE
181 * for print files *only*, where
182 * DELETE_ON_CLOSE is not stored in the share
185 unsigned long gen_id;
188 typedef struct files_struct {
189 struct files_struct *next, *prev;
191 struct smbXsrv_open *op;
192 struct connection_struct *conn;
193 struct fd_handle *fh;
194 unsigned int num_smb_operations;
195 struct file_id file_id;
196 uint64_t initial_allocation_size; /* Faked up initial allocation on disk. */
198 uint64_t vuid; /* SMB2 compat */
199 struct write_cache *wcp;
200 struct timeval open_time;
201 uint32 access_mask; /* NTCreateX access bits (FILE_READ_DATA etc.) */
202 uint32 share_access; /* NTCreateX share constants (FILE_SHARE_READ|FILE_SHARE_WRITE|FILE_SHARE_DELETE). */
204 bool update_write_time_triggered;
205 struct timed_event *update_write_time_event;
206 bool update_write_time_on_close;
207 struct timespec close_write_time;
208 bool write_time_forced;
211 int sent_oplock_break;
212 struct timed_event *oplock_timeout;
213 struct lock_struct last_lock_failure;
214 int current_lock_count; /* Count the number of outstanding locks and pending locks. */
216 struct share_mode_entry *pending_break_messages;
217 int num_pending_break_messages;
224 bool aio_write_behind;
226 bool initial_delete_on_close; /* Only set at NTCreateX if file was created. */
227 bool delete_on_close;
230 bool backup_intent; /* Handle was successfully opened with backup intent
231 and opener has privilege to do so. */
232 struct smb_filename *fsp_name;
233 uint32_t name_hash; /* Jenkins hash of full pathname. */
234 uint64_t mid; /* Mid of the operation that created us. */
236 struct vfs_fsp_data *vfs_extension;
237 struct fake_file_handle *fake_file_handle;
239 struct notify_change_buf *notify;
241 struct files_struct *base_fsp; /* placeholder for delete on close */
244 * Read-only cached brlock record, thrown away when the
245 * brlock.tdb seqnum changes. This avoids fetching data from
246 * the brlock.tdb on every read/write call.
249 struct byte_range_lock *brlock_rec;
251 struct dptr_struct *dptr;
253 /* if not NULL, means this is a print file */
254 struct print_file_data *print_file;
256 unsigned num_aio_requests;
257 struct tevent_req **aio_requests;
260 * If a close request comes in while we still have aio_requests
261 * around, we need to hold back the close. When all aio_requests are
262 * done, the aio completion routines need tevent_wait_done() on
263 * this. A bit ugly, but before we have close_file() fully async
264 * possibly the simplest approach. Thanks, Jeremy for the idea.
266 struct tevent_req *deferred_close;
269 struct vuid_cache_entry {
270 struct auth_session_info *session_info;
271 uint64_t vuid; /* SMB2 compat */
276 unsigned int next_entry;
277 struct vuid_cache_entry array[VUID_CACHE_SIZE];
283 } name_compare_entry;
285 struct dfree_cached_info {
286 time_t last_dfree_time;
293 struct share_params {
297 typedef struct connection_struct {
298 struct connection_struct *next, *prev;
299 struct smbd_server_connection *sconn; /* can be NULL */
300 struct smbXsrv_tcon *tcon; /* can be NULL */
301 uint32_t cnum; /* an index passed over the wire */
302 struct share_params *params;
304 struct vuid_cache vuid_cache;
307 bool read_only; /* Attributes for the current user of the share. */
308 uint32_t share_access;
309 /* Does this filesystem honor
310 sub second timestamps on files
311 and directories when setting time ? */
312 enum timestamp_set_resolution ts_res;
316 struct vfs_handle_struct *vfs_handles; /* for the new plugins */
319 * This represents the user information on this connection. Depending
320 * on the vuid using this tid, this might change per SMB request.
322 struct auth_session_info *session_info;
325 * If the "force group" parameter is set, this is the primary gid that
326 * may be used in the users token, depending on the vuid using this tid.
328 gid_t force_group_gid;
330 uint64_t vuid; /* vuid of user who *opened* this connection, or UID_FIELD_INVALID */
333 time_t lastused_count;
335 unsigned int num_smb_operations; /* Count of smb operations on this tree. */
339 /* Semantics requested by the client or forced by the server config. */
342 bool short_case_preserve;
344 /* Semantics provided by the underlying filesystem. */
346 /* Device number of the directory of the share mount.
347 Used to ensure unique FileIndex returns. */
348 SMB_DEV_T base_share_dev;
350 name_compare_entry *hide_list; /* Per-share list of files to return as hidden. */
351 name_compare_entry *veto_list; /* Per-share list of files to veto (never show). */
352 name_compare_entry *veto_oplock_list; /* Per-share list of files to refuse oplocks on. */
353 name_compare_entry *aio_write_behind_list; /* Per-share list of files to use aio write behind on. */
354 struct dfree_cached_info *dfree_info;
355 struct trans_state *pending_trans;
357 struct rpc_pipe_client *spoolss_pipe;
361 struct smbd_smb2_request;
362 struct privilege_paths;
368 uint64_t mid; /* For compatibility with SMB2. */
370 uint64_t vuid; /* For compatibility with SMB2. */
379 * Async handling in the main smb processing loop is directed by
380 * outbuf: reply_xxx routines indicate sync behaviour by putting their
381 * reply into "outbuf". If they leave it as NULL, they take care of it
382 * themselves, possibly later.
384 * If async handling is wanted, the reply_xxx routine must make sure
385 * that it talloc_move()s the smb_req somewhere else.
391 connection_struct *conn;
392 struct smbd_server_connection *sconn;
393 struct smb_perfcount_data pcd;
396 * Chained request handling
398 struct files_struct *chain_fsp;
401 * state information for async smb handling
406 * Back pointer to smb2 request.
408 struct smbd_smb2_request *smb2req;
411 * Pathnames used if request done
414 struct privilege_paths *priv_paths;
417 * Request list for chained requests, we're part of it.
419 struct smb_request **chain;
421 struct timeval request_time;
425 * Info about an alternate data stream
428 struct stream_struct {
435 struct smb_file_time {
436 struct timespec mtime;
437 struct timespec atime;
438 struct timespec ctime;
439 struct timespec create_time;
445 struct smb_filename {
448 char *original_lcomp;
452 #define VFS_FIND(__fn__) while (handle->fns->__fn__##_fn==NULL) { \
453 handle = handle->next; \
456 enum vfs_translate_direction {
457 vfs_translate_to_unix = 0,
458 vfs_translate_to_windows
461 enum vfs_fallocate_mode {
462 VFS_FALLOCATE_EXTEND_SIZE = 0,
463 VFS_FALLOCATE_KEEP_SIZE = 1
467 Available VFS operations. These values must be in sync with vfs_ops struct
468 (struct vfs_fn_pointers and struct vfs_handle_pointers inside of struct vfs_ops).
469 In particular, if new operations are added to vfs_ops, appropriate constants
470 should be added to vfs_op_type so that order of them kept same as in vfs_ops.
472 struct shadow_copy_data;
474 struct vfs_fn_pointers {
475 /* Disk operations */
477 int (*connect_fn)(struct vfs_handle_struct *handle, const char *service, const char *user);
478 void (*disconnect_fn)(struct vfs_handle_struct *handle);
479 uint64_t (*disk_free_fn)(struct vfs_handle_struct *handle, const char *path, bool small_query, uint64_t *bsize,
480 uint64_t *dfree, uint64_t *dsize);
481 int (*get_quota_fn)(struct vfs_handle_struct *handle, enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *qt);
482 int (*set_quota_fn)(struct vfs_handle_struct *handle, enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *qt);
483 int (*get_shadow_copy_data_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, struct shadow_copy_data *shadow_copy_data, bool labels);
484 int (*statvfs_fn)(struct vfs_handle_struct *handle, const char *path, struct vfs_statvfs_struct *statbuf);
485 uint32_t (*fs_capabilities_fn)(struct vfs_handle_struct *handle, enum timestamp_set_resolution *p_ts_res);
488 * Note: that "struct dfs_GetDFSReferral *r"
489 * needs to be a valid TALLOC_CTX
491 NTSTATUS (*get_dfs_referrals_fn)(struct vfs_handle_struct *handle,
492 struct dfs_GetDFSReferral *r);
494 /* Directory operations */
496 DIR *(*opendir_fn)(struct vfs_handle_struct *handle, const char *fname, const char *mask, uint32 attributes);
497 DIR *(*fdopendir_fn)(struct vfs_handle_struct *handle, files_struct *fsp, const char *mask, uint32 attributes);
498 struct dirent *(*readdir_fn)(struct vfs_handle_struct *handle,
500 SMB_STRUCT_STAT *sbuf);
501 void (*seekdir_fn)(struct vfs_handle_struct *handle, DIR *dirp, long offset);
502 long (*telldir_fn)(struct vfs_handle_struct *handle, DIR *dirp);
503 void (*rewind_dir_fn)(struct vfs_handle_struct *handle, DIR *dirp);
504 int (*mkdir_fn)(struct vfs_handle_struct *handle, const char *path, mode_t mode);
505 int (*rmdir_fn)(struct vfs_handle_struct *handle, const char *path);
506 int (*closedir_fn)(struct vfs_handle_struct *handle, DIR *dir);
507 void (*init_search_op_fn)(struct vfs_handle_struct *handle, DIR *dirp);
509 /* File operations */
511 int (*open_fn)(struct vfs_handle_struct *handle,
512 struct smb_filename *smb_fname, files_struct *fsp,
513 int flags, mode_t mode);
514 NTSTATUS (*create_file_fn)(struct vfs_handle_struct *handle,
515 struct smb_request *req,
516 uint16_t root_dir_fid,
517 struct smb_filename *smb_fname,
518 uint32_t access_mask,
519 uint32_t share_access,
520 uint32_t create_disposition,
521 uint32_t create_options,
522 uint32_t file_attributes,
523 uint32_t oplock_request,
524 uint64_t allocation_size,
525 uint32_t private_flags,
526 struct security_descriptor *sd,
527 struct ea_list *ea_list,
528 files_struct **result,
530 int (*close_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp);
531 ssize_t (*read_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, void *data, size_t n);
532 ssize_t (*pread_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, void *data, size_t n, off_t offset);
533 struct tevent_req *(*pread_send_fn)(struct vfs_handle_struct *handle,
535 struct tevent_context *ev,
536 struct files_struct *fsp,
538 size_t n, off_t offset);
539 ssize_t (*pread_recv_fn)(struct tevent_req *req, int *err);
540 ssize_t (*write_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, const void *data, size_t n);
541 ssize_t (*pwrite_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, const void *data, size_t n, off_t offset);
542 struct tevent_req *(*pwrite_send_fn)(struct vfs_handle_struct *handle,
544 struct tevent_context *ev,
545 struct files_struct *fsp,
547 size_t n, off_t offset);
548 ssize_t (*pwrite_recv_fn)(struct tevent_req *req, int *err);
549 off_t (*lseek_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, off_t offset, int whence);
550 ssize_t (*sendfile_fn)(struct vfs_handle_struct *handle, int tofd, files_struct *fromfsp, const DATA_BLOB *header, off_t offset, size_t count);
551 ssize_t (*recvfile_fn)(struct vfs_handle_struct *handle, int fromfd, files_struct *tofsp, off_t offset, size_t count);
552 int (*rename_fn)(struct vfs_handle_struct *handle,
553 const struct smb_filename *smb_fname_src,
554 const struct smb_filename *smb_fname_dst);
555 int (*fsync_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp);
556 struct tevent_req *(*fsync_send_fn)(struct vfs_handle_struct *handle,
558 struct tevent_context *ev,
559 struct files_struct *fsp);
560 int (*fsync_recv_fn)(struct tevent_req *req, int *err);
561 int (*stat_fn)(struct vfs_handle_struct *handle, struct smb_filename *smb_fname);
562 int (*fstat_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, SMB_STRUCT_STAT *sbuf);
563 int (*lstat_fn)(struct vfs_handle_struct *handle, struct smb_filename *smb_filename);
564 uint64_t (*get_alloc_size_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, const SMB_STRUCT_STAT *sbuf);
565 int (*unlink_fn)(struct vfs_handle_struct *handle,
566 const struct smb_filename *smb_fname);
567 int (*chmod_fn)(struct vfs_handle_struct *handle, const char *path, mode_t mode);
568 int (*fchmod_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, mode_t mode);
569 int (*chown_fn)(struct vfs_handle_struct *handle, const char *path, uid_t uid, gid_t gid);
570 int (*fchown_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, uid_t uid, gid_t gid);
571 int (*lchown_fn)(struct vfs_handle_struct *handle, const char *path, uid_t uid, gid_t gid);
572 int (*chdir_fn)(struct vfs_handle_struct *handle, const char *path);
573 char *(*getwd_fn)(struct vfs_handle_struct *handle);
574 int (*ntimes_fn)(struct vfs_handle_struct *handle,
575 const struct smb_filename *smb_fname,
576 struct smb_file_time *ft);
577 int (*ftruncate_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, off_t offset);
578 int (*fallocate_fn)(struct vfs_handle_struct *handle,
579 struct files_struct *fsp,
580 enum vfs_fallocate_mode mode,
583 bool (*lock_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, int op, off_t offset, off_t count, int type);
584 int (*kernel_flock_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp,
585 uint32 share_mode, uint32_t access_mask);
586 int (*linux_setlease_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, int leasetype);
587 bool (*getlock_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, off_t *poffset, off_t *pcount, int *ptype, pid_t *ppid);
588 int (*symlink_fn)(struct vfs_handle_struct *handle, const char *oldpath, const char *newpath);
589 int (*readlink_fn)(struct vfs_handle_struct *handle, const char *path, char *buf, size_t bufsiz);
590 int (*link_fn)(struct vfs_handle_struct *handle, const char *oldpath, const char *newpath);
591 int (*mknod_fn)(struct vfs_handle_struct *handle, const char *path, mode_t mode, SMB_DEV_T dev);
592 char *(*realpath_fn)(struct vfs_handle_struct *handle, const char *path);
593 NTSTATUS (*notify_watch_fn)(struct vfs_handle_struct *handle,
594 struct sys_notify_context *ctx,
597 uint32_t *subdir_filter,
598 void (*callback)(struct sys_notify_context *ctx,
600 struct notify_event *ev),
603 int (*chflags_fn)(struct vfs_handle_struct *handle, const char *path, unsigned int flags);
604 struct file_id (*file_id_create_fn)(struct vfs_handle_struct *handle,
605 const SMB_STRUCT_STAT *sbuf);
607 NTSTATUS (*streaminfo_fn)(struct vfs_handle_struct *handle,
608 struct files_struct *fsp,
611 unsigned int *num_streams,
612 struct stream_struct **streams);
614 int (*get_real_filename_fn)(struct vfs_handle_struct *handle,
620 const char *(*connectpath_fn)(struct vfs_handle_struct *handle,
621 const char *filename);
623 NTSTATUS (*brl_lock_windows_fn)(struct vfs_handle_struct *handle,
624 struct byte_range_lock *br_lck,
625 struct lock_struct *plock,
627 struct blocking_lock_record *blr);
629 bool (*brl_unlock_windows_fn)(struct vfs_handle_struct *handle,
630 struct messaging_context *msg_ctx,
631 struct byte_range_lock *br_lck,
632 const struct lock_struct *plock);
634 bool (*brl_cancel_windows_fn)(struct vfs_handle_struct *handle,
635 struct byte_range_lock *br_lck,
636 struct lock_struct *plock,
637 struct blocking_lock_record *blr);
639 bool (*strict_lock_fn)(struct vfs_handle_struct *handle,
640 struct files_struct *fsp,
641 struct lock_struct *plock);
643 void (*strict_unlock_fn)(struct vfs_handle_struct *handle,
644 struct files_struct *fsp,
645 struct lock_struct *plock);
647 NTSTATUS (*translate_name_fn)(struct vfs_handle_struct *handle,
649 enum vfs_translate_direction direction,
653 NTSTATUS (*fsctl_fn)(struct vfs_handle_struct *handle,
654 struct files_struct *fsp,
658 const uint8_t *_in_data,
661 uint32_t max_out_len,
664 /* NT ACL operations. */
666 NTSTATUS (*fget_nt_acl_fn)(struct vfs_handle_struct *handle,
667 struct files_struct *fsp,
668 uint32 security_info,
669 struct security_descriptor **ppdesc);
670 NTSTATUS (*get_nt_acl_fn)(struct vfs_handle_struct *handle,
672 uint32 security_info,
673 struct security_descriptor **ppdesc);
674 NTSTATUS (*fset_nt_acl_fn)(struct vfs_handle_struct *handle,
675 struct files_struct *fsp,
676 uint32 security_info_sent,
677 const struct security_descriptor *psd);
679 NTSTATUS (*audit_file_fn)(struct vfs_handle_struct *handle,
680 struct smb_filename *file,
681 struct security_acl *sacl,
682 uint32_t access_requested,
683 uint32_t access_denied);
685 /* POSIX ACL operations. */
687 int (*chmod_acl_fn)(struct vfs_handle_struct *handle, const char *name, mode_t mode);
688 int (*fchmod_acl_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, mode_t mode);
690 SMB_ACL_T (*sys_acl_get_file_fn)(struct vfs_handle_struct *handle, const char *path_p, SMB_ACL_TYPE_T type);
691 SMB_ACL_T (*sys_acl_get_fd_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp);
692 int (*sys_acl_set_file_fn)(struct vfs_handle_struct *handle, const char *name, SMB_ACL_TYPE_T acltype, SMB_ACL_T theacl);
693 int (*sys_acl_set_fd_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, SMB_ACL_T theacl);
694 int (*sys_acl_delete_def_file_fn)(struct vfs_handle_struct *handle, const char *path);
697 ssize_t (*getxattr_fn)(struct vfs_handle_struct *handle,const char *path, const char *name, void *value, size_t size);
698 ssize_t (*fgetxattr_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, const char *name, void *value, size_t size);
699 ssize_t (*listxattr_fn)(struct vfs_handle_struct *handle, const char *path, char *list, size_t size);
700 ssize_t (*flistxattr_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, char *list, size_t size);
701 int (*removexattr_fn)(struct vfs_handle_struct *handle, const char *path, const char *name);
702 int (*fremovexattr_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, const char *name);
703 int (*setxattr_fn)(struct vfs_handle_struct *handle, const char *path, const char *name, const void *value, size_t size, int flags);
704 int (*fsetxattr_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, const char *name, const void *value, size_t size, int flags);
707 bool (*aio_force_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp);
709 /* offline operations */
710 bool (*is_offline_fn)(struct vfs_handle_struct *handle,
711 const struct smb_filename *fname,
712 SMB_STRUCT_STAT *sbuf);
713 int (*set_offline_fn)(struct vfs_handle_struct *handle,
714 const struct smb_filename *fname);
718 VFS operation description. Each VFS module registers an array of vfs_op_tuple to VFS subsystem,
719 which describes all operations this module is willing to intercept.
720 VFS subsystem initializes then the conn->vfs_ops and conn->vfs_opaque_ops structs
721 using this information.
724 typedef struct vfs_handle_struct {
725 struct vfs_handle_struct *next, *prev;
727 struct connection_struct *conn;
728 const struct vfs_fn_pointers *fns;
730 void (*free_data)(void **data);
734 typedef struct vfs_statvfs_struct {
735 /* For undefined recommended transfer size return -1 in that field */
736 uint32 OptimalTransferSize; /* bsize on some os, iosize on other os */
740 The next three fields are in terms of the block size.
741 (above). If block size is unknown, 4096 would be a
742 reasonable block size for a server to report.
743 Note that returning the blocks/blocksavail removes need
744 to make a second call (to QFSInfo level 0x103 to get this info.
745 UserBlockAvail is typically less than or equal to BlocksAvail,
746 if no distinction is made return the same value in each.
749 uint64_t TotalBlocks;
750 uint64_t BlocksAvail; /* bfree */
751 uint64_t UserBlocksAvail; /* bavail */
753 /* For undefined Node fields or FSID return -1 */
754 uint64_t TotalFileNodes;
755 uint64_t FreeFileNodes;
756 uint64_t FsIdentifier; /* fsid */
757 /* NB Namelen comes from FILE_SYSTEM_ATTRIBUTE_INFO call */
758 /* NB flags can come from FILE_SYSTEM_DEVICE_INFO call */
761 } vfs_statvfs_struct;
763 /* Add a new FSP extension of the given type. Returns a pointer to the
766 #define VFS_ADD_FSP_EXTENSION(handle, fsp, type, destroy_fn) \
767 vfs_add_fsp_extension_notype(handle, (fsp), sizeof(type), (destroy_fn))
769 /* Return a pointer to the existing FSP extension data. */
770 #define VFS_FETCH_FSP_EXTENSION(handle, fsp) \
771 vfs_fetch_fsp_extension(handle, (fsp))
773 /* Return the talloc context associated with an FSP extension. */
774 #define VFS_MEMCTX_FSP_EXTENSION(handle, fsp) \
775 vfs_memctx_fsp_extension(handle, (fsp))
777 /* Remove and destroy an FSP extension. */
778 #define VFS_REMOVE_FSP_EXTENSION(handle, fsp) \
779 vfs_remove_fsp_extension((handle), (fsp))
781 #define SMB_VFS_HANDLE_GET_DATA(handle, datap, type, ret) { \
782 if (!(handle)||((datap=(type *)(handle)->data)==NULL)) { \
783 DEBUG(0,("%s() failed to get vfs_handle->data!\n",__FUNCTION__)); \
788 #define SMB_VFS_HANDLE_SET_DATA(handle, datap, free_fn, type, ret) { \
790 DEBUG(0,("%s() failed to set handle->data!\n",__FUNCTION__)); \
793 if ((handle)->free_data) { \
794 (handle)->free_data(&(handle)->data); \
796 (handle)->data = (void *)datap; \
797 (handle)->free_data = free_fn; \
801 #define SMB_VFS_HANDLE_FREE_DATA(handle) { \
802 if ((handle) && (handle)->free_data) { \
803 (handle)->free_data(&(handle)->data); \
807 /* Check whether module-specific data handle was already allocated or not */
808 #define SMB_VFS_HANDLE_TEST_DATA(handle) ( !(handle) || !(handle)->data ? False : True )
810 #define SMB_VFS_OP(x) ((void *) x)
812 #define DEFAULT_VFS_MODULE_NAME "/[Default VFS]/"
814 #include "vfs_macros.h"
816 int smb_vfs_call_connect(struct vfs_handle_struct *handle,
817 const char *service, const char *user);
818 void smb_vfs_call_disconnect(struct vfs_handle_struct *handle);
819 uint64_t smb_vfs_call_disk_free(struct vfs_handle_struct *handle,
820 const char *path, bool small_query,
821 uint64_t *bsize, uint64_t *dfree,
823 int smb_vfs_call_get_quota(struct vfs_handle_struct *handle,
824 enum SMB_QUOTA_TYPE qtype, unid_t id,
826 int smb_vfs_call_set_quota(struct vfs_handle_struct *handle,
827 enum SMB_QUOTA_TYPE qtype, unid_t id,
829 int smb_vfs_call_get_shadow_copy_data(struct vfs_handle_struct *handle,
830 struct files_struct *fsp,
831 struct shadow_copy_data *shadow_copy_data,
833 int smb_vfs_call_statvfs(struct vfs_handle_struct *handle, const char *path,
834 struct vfs_statvfs_struct *statbuf);
835 uint32_t smb_vfs_call_fs_capabilities(struct vfs_handle_struct *handle,
836 enum timestamp_set_resolution *p_ts_res);
838 * Note: that "struct dfs_GetDFSReferral *r" needs to be a valid TALLOC_CTX
840 NTSTATUS smb_vfs_call_get_dfs_referrals(struct vfs_handle_struct *handle,
841 struct dfs_GetDFSReferral *r);
842 DIR *smb_vfs_call_opendir(struct vfs_handle_struct *handle,
843 const char *fname, const char *mask,
845 DIR *smb_vfs_call_fdopendir(struct vfs_handle_struct *handle,
846 struct files_struct *fsp,
849 struct dirent *smb_vfs_call_readdir(struct vfs_handle_struct *handle,
851 SMB_STRUCT_STAT *sbuf);
852 void smb_vfs_call_seekdir(struct vfs_handle_struct *handle,
853 DIR *dirp, long offset);
854 long smb_vfs_call_telldir(struct vfs_handle_struct *handle,
856 void smb_vfs_call_rewind_dir(struct vfs_handle_struct *handle,
858 int smb_vfs_call_mkdir(struct vfs_handle_struct *handle, const char *path,
860 int smb_vfs_call_rmdir(struct vfs_handle_struct *handle, const char *path);
861 int smb_vfs_call_closedir(struct vfs_handle_struct *handle,
863 void smb_vfs_call_init_search_op(struct vfs_handle_struct *handle,
865 int smb_vfs_call_open(struct vfs_handle_struct *handle,
866 struct smb_filename *smb_fname, struct files_struct *fsp,
867 int flags, mode_t mode);
868 NTSTATUS smb_vfs_call_create_file(struct vfs_handle_struct *handle,
869 struct smb_request *req,
870 uint16_t root_dir_fid,
871 struct smb_filename *smb_fname,
872 uint32_t access_mask,
873 uint32_t share_access,
874 uint32_t create_disposition,
875 uint32_t create_options,
876 uint32_t file_attributes,
877 uint32_t oplock_request,
878 uint64_t allocation_size,
879 uint32_t private_flags,
880 struct security_descriptor *sd,
881 struct ea_list *ea_list,
882 files_struct **result,
884 int smb_vfs_call_close(struct vfs_handle_struct *handle,
885 struct files_struct *fsp);
886 ssize_t smb_vfs_call_read(struct vfs_handle_struct *handle,
887 struct files_struct *fsp, void *data, size_t n);
888 ssize_t smb_vfs_call_pread(struct vfs_handle_struct *handle,
889 struct files_struct *fsp, void *data, size_t n,
891 struct tevent_req *smb_vfs_call_pread_send(struct vfs_handle_struct *handle,
893 struct tevent_context *ev,
894 struct files_struct *fsp,
896 size_t n, off_t offset);
897 ssize_t SMB_VFS_PREAD_RECV(struct tevent_req *req, int *perrno);
899 ssize_t smb_vfs_call_write(struct vfs_handle_struct *handle,
900 struct files_struct *fsp, const void *data,
902 ssize_t smb_vfs_call_pwrite(struct vfs_handle_struct *handle,
903 struct files_struct *fsp, const void *data,
904 size_t n, off_t offset);
905 struct tevent_req *smb_vfs_call_pwrite_send(struct vfs_handle_struct *handle,
907 struct tevent_context *ev,
908 struct files_struct *fsp,
910 size_t n, off_t offset);
911 ssize_t SMB_VFS_PWRITE_RECV(struct tevent_req *req, int *perrno);
913 off_t smb_vfs_call_lseek(struct vfs_handle_struct *handle,
914 struct files_struct *fsp, off_t offset,
916 ssize_t smb_vfs_call_sendfile(struct vfs_handle_struct *handle, int tofd,
917 files_struct *fromfsp, const DATA_BLOB *header,
918 off_t offset, size_t count);
919 ssize_t smb_vfs_call_recvfile(struct vfs_handle_struct *handle, int fromfd,
920 files_struct *tofsp, off_t offset,
922 int smb_vfs_call_rename(struct vfs_handle_struct *handle,
923 const struct smb_filename *smb_fname_src,
924 const struct smb_filename *smb_fname_dst);
925 int smb_vfs_call_fsync(struct vfs_handle_struct *handle,
926 struct files_struct *fsp);
928 struct tevent_req *smb_vfs_call_fsync_send(struct vfs_handle_struct *handle,
930 struct tevent_context *ev,
931 struct files_struct *fsp);
932 int SMB_VFS_FSYNC_RECV(struct tevent_req *req, int *perrno);
934 int smb_vfs_call_stat(struct vfs_handle_struct *handle,
935 struct smb_filename *smb_fname);
936 int smb_vfs_call_fstat(struct vfs_handle_struct *handle,
937 struct files_struct *fsp, SMB_STRUCT_STAT *sbuf);
938 int smb_vfs_call_lstat(struct vfs_handle_struct *handle,
939 struct smb_filename *smb_filename);
940 uint64_t smb_vfs_call_get_alloc_size(struct vfs_handle_struct *handle,
941 struct files_struct *fsp,
942 const SMB_STRUCT_STAT *sbuf);
943 int smb_vfs_call_unlink(struct vfs_handle_struct *handle,
944 const struct smb_filename *smb_fname);
945 int smb_vfs_call_chmod(struct vfs_handle_struct *handle, const char *path,
947 int smb_vfs_call_fchmod(struct vfs_handle_struct *handle,
948 struct files_struct *fsp, mode_t mode);
949 int smb_vfs_call_chown(struct vfs_handle_struct *handle, const char *path,
950 uid_t uid, gid_t gid);
951 int smb_vfs_call_fchown(struct vfs_handle_struct *handle,
952 struct files_struct *fsp, uid_t uid, gid_t gid);
953 int smb_vfs_call_lchown(struct vfs_handle_struct *handle, const char *path,
954 uid_t uid, gid_t gid);
955 int smb_vfs_call_chdir(struct vfs_handle_struct *handle, const char *path);
956 char *smb_vfs_call_getwd(struct vfs_handle_struct *handle);
957 int smb_vfs_call_ntimes(struct vfs_handle_struct *handle,
958 const struct smb_filename *smb_fname,
959 struct smb_file_time *ft);
960 int smb_vfs_call_ftruncate(struct vfs_handle_struct *handle,
961 struct files_struct *fsp, off_t offset);
962 int smb_vfs_call_fallocate(struct vfs_handle_struct *handle,
963 struct files_struct *fsp,
964 enum vfs_fallocate_mode mode,
967 bool smb_vfs_call_lock(struct vfs_handle_struct *handle,
968 struct files_struct *fsp, int op, off_t offset,
969 off_t count, int type);
970 int smb_vfs_call_kernel_flock(struct vfs_handle_struct *handle,
971 struct files_struct *fsp, uint32 share_mode,
972 uint32_t access_mask);
973 int smb_vfs_call_linux_setlease(struct vfs_handle_struct *handle,
974 struct files_struct *fsp, int leasetype);
975 bool smb_vfs_call_getlock(struct vfs_handle_struct *handle,
976 struct files_struct *fsp, off_t *poffset,
977 off_t *pcount, int *ptype, pid_t *ppid);
978 int smb_vfs_call_symlink(struct vfs_handle_struct *handle, const char *oldpath,
979 const char *newpath);
980 int smb_vfs_call_readlink(struct vfs_handle_struct *handle,
981 const char *path, char *buf, size_t bufsiz);
982 int smb_vfs_call_link(struct vfs_handle_struct *handle, const char *oldpath,
983 const char *newpath);
984 int smb_vfs_call_mknod(struct vfs_handle_struct *handle, const char *path,
985 mode_t mode, SMB_DEV_T dev);
986 char *smb_vfs_call_realpath(struct vfs_handle_struct *handle, const char *path);
987 NTSTATUS smb_vfs_call_notify_watch(struct vfs_handle_struct *handle,
988 struct sys_notify_context *ctx,
991 uint32_t *subdir_filter,
992 void (*callback)(struct sys_notify_context *ctx,
994 struct notify_event *ev),
995 void *private_data, void *handle_p);
996 int smb_vfs_call_chflags(struct vfs_handle_struct *handle, const char *path,
998 struct file_id smb_vfs_call_file_id_create(struct vfs_handle_struct *handle,
999 const SMB_STRUCT_STAT *sbuf);
1000 NTSTATUS smb_vfs_call_streaminfo(struct vfs_handle_struct *handle,
1001 struct files_struct *fsp,
1003 TALLOC_CTX *mem_ctx,
1004 unsigned int *num_streams,
1005 struct stream_struct **streams);
1006 int smb_vfs_call_get_real_filename(struct vfs_handle_struct *handle,
1007 const char *path, const char *name,
1008 TALLOC_CTX *mem_ctx, char **found_name);
1009 const char *smb_vfs_call_connectpath(struct vfs_handle_struct *handle,
1010 const char *filename);
1011 NTSTATUS smb_vfs_call_brl_lock_windows(struct vfs_handle_struct *handle,
1012 struct byte_range_lock *br_lck,
1013 struct lock_struct *plock,
1015 struct blocking_lock_record *blr);
1016 bool smb_vfs_call_brl_unlock_windows(struct vfs_handle_struct *handle,
1017 struct messaging_context *msg_ctx,
1018 struct byte_range_lock *br_lck,
1019 const struct lock_struct *plock);
1020 bool smb_vfs_call_brl_cancel_windows(struct vfs_handle_struct *handle,
1021 struct byte_range_lock *br_lck,
1022 struct lock_struct *plock,
1023 struct blocking_lock_record *blr);
1024 bool smb_vfs_call_strict_lock(struct vfs_handle_struct *handle,
1025 struct files_struct *fsp,
1026 struct lock_struct *plock);
1027 void smb_vfs_call_strict_unlock(struct vfs_handle_struct *handle,
1028 struct files_struct *fsp,
1029 struct lock_struct *plock);
1030 NTSTATUS smb_vfs_call_translate_name(struct vfs_handle_struct *handle,
1032 enum vfs_translate_direction direction,
1033 TALLOC_CTX *mem_ctx,
1034 char **mapped_name);
1035 NTSTATUS smb_vfs_call_fsctl(struct vfs_handle_struct *handle,
1036 struct files_struct *fsp,
1040 const uint8_t *_in_data,
1042 uint8_t **_out_data,
1043 uint32_t max_out_len,
1045 NTSTATUS smb_vfs_call_fget_nt_acl(struct vfs_handle_struct *handle,
1046 struct files_struct *fsp,
1047 uint32 security_info,
1048 struct security_descriptor **ppdesc);
1049 NTSTATUS smb_vfs_call_get_nt_acl(struct vfs_handle_struct *handle,
1051 uint32 security_info,
1052 struct security_descriptor **ppdesc);
1053 NTSTATUS smb_vfs_call_fset_nt_acl(struct vfs_handle_struct *handle,
1054 struct files_struct *fsp,
1055 uint32 security_info_sent,
1056 const struct security_descriptor *psd);
1057 NTSTATUS smb_vfs_call_audit_file(struct vfs_handle_struct *handle,
1058 struct smb_filename *file,
1059 struct security_acl *sacl,
1060 uint32_t access_requested,
1061 uint32_t access_denied);
1062 int smb_vfs_call_chmod_acl(struct vfs_handle_struct *handle, const char *name,
1064 int smb_vfs_call_fchmod_acl(struct vfs_handle_struct *handle,
1065 struct files_struct *fsp, mode_t mode);
1066 SMB_ACL_T smb_vfs_call_sys_acl_get_file(struct vfs_handle_struct *handle,
1068 SMB_ACL_TYPE_T type);
1069 SMB_ACL_T smb_vfs_call_sys_acl_get_fd(struct vfs_handle_struct *handle,
1070 struct files_struct *fsp);
1071 int smb_vfs_call_sys_acl_set_file(struct vfs_handle_struct *handle,
1072 const char *name, SMB_ACL_TYPE_T acltype,
1074 int smb_vfs_call_sys_acl_set_fd(struct vfs_handle_struct *handle,
1075 struct files_struct *fsp, SMB_ACL_T theacl);
1076 int smb_vfs_call_sys_acl_delete_def_file(struct vfs_handle_struct *handle,
1078 ssize_t smb_vfs_call_getxattr(struct vfs_handle_struct *handle,
1079 const char *path, const char *name, void *value,
1081 ssize_t smb_vfs_call_fgetxattr(struct vfs_handle_struct *handle,
1082 struct files_struct *fsp, const char *name,
1083 void *value, size_t size);
1084 ssize_t smb_vfs_call_listxattr(struct vfs_handle_struct *handle,
1085 const char *path, char *list, size_t size);
1086 ssize_t smb_vfs_call_llistxattr(struct vfs_handle_struct *handle,
1087 const char *path, char *list, size_t size);
1088 ssize_t smb_vfs_call_flistxattr(struct vfs_handle_struct *handle,
1089 struct files_struct *fsp, char *list,
1091 int smb_vfs_call_removexattr(struct vfs_handle_struct *handle,
1092 const char *path, const char *name);
1093 int smb_vfs_call_fremovexattr(struct vfs_handle_struct *handle,
1094 struct files_struct *fsp, const char *name);
1095 int smb_vfs_call_setxattr(struct vfs_handle_struct *handle, const char *path,
1096 const char *name, const void *value, size_t size,
1098 int smb_vfs_call_lsetxattr(struct vfs_handle_struct *handle, const char *path,
1099 const char *name, const void *value, size_t size,
1101 int smb_vfs_call_fsetxattr(struct vfs_handle_struct *handle,
1102 struct files_struct *fsp, const char *name,
1103 const void *value, size_t size, int flags);
1104 bool smb_vfs_call_aio_force(struct vfs_handle_struct *handle,
1105 struct files_struct *fsp);
1106 bool smb_vfs_call_is_offline(struct vfs_handle_struct *handle,
1107 const struct smb_filename *fname,
1108 SMB_STRUCT_STAT *sbuf);
1109 int smb_vfs_call_set_offline(struct vfs_handle_struct *handle,
1110 const struct smb_filename *fname);
1112 NTSTATUS smb_register_vfs(int version, const char *name,
1113 const struct vfs_fn_pointers *fns);
1114 void *vfs_add_fsp_extension_notype(vfs_handle_struct *handle,
1115 files_struct *fsp, size_t ext_size,
1116 void (*destroy_fn)(void *p_data));
1117 void vfs_remove_fsp_extension(vfs_handle_struct *handle, files_struct *fsp);
1118 void vfs_remove_all_fsp_extensions(struct files_struct *fsp);
1119 void *vfs_memctx_fsp_extension(vfs_handle_struct *handle, files_struct *fsp);
1120 void *vfs_fetch_fsp_extension(vfs_handle_struct *handle, files_struct *fsp);