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
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>.
22 This work was sponsored by Optifacio Software Services, Inc.
28 /* Avoid conflict with an AIX include file */
35 * As we're now (thanks Andrew ! :-) using file_structs and connection
36 * structs in the vfs - then anyone writing a vfs must include includes.h...
40 * This next constant specifies the version number of the VFS interface
41 * this smbd will load. Increment this if *ANY* changes are made to the
44 * If you change anything here, please also update modules/vfs_full_audit.c.
48 /* Changed to version 2 for CIFS UNIX extensions (mknod and link added). JRA. */
49 /* Changed to version 3 for POSIX acl extensions. JRA. */
50 /* Changed to version 4 for cascaded VFS interface. Alexander Bokovoy. */
51 /* Changed to version 5 for sendfile addition. JRA. */
52 /* Changed to version 6 for the new module system, fixed cascading and quota functions. --metze */
53 /* Changed to version 7 to include the get_nt_acl info parameter. JRA. */
54 /* Changed to version 8 includes EA calls. JRA. */
55 /* Changed to version 9 to include the get_shadow_data call. --metze */
56 /* Changed to version 10 to include pread/pwrite calls. */
57 /* Changed to version 11 to include seekdir/telldir/rewinddir calls. JRA */
58 /* Changed to version 12 to add mask and attributes to opendir(). JRA
59 Also include aio calls. JRA. */
60 /* Changed to version 13 as the internal structure of files_struct has changed. JRA */
61 /* Changed to version 14 as we had to change DIR to SMB_STRUCT_DIR. JRA */
62 /* Changed to version 15 as we added the statvfs call. JRA */
63 /* Changed to version 16 as we added the getlock call. JRA */
64 /* Changed to version 17 as we removed redundant connection_struct parameters. --jpeach */
65 /* Changed to version 18 to add fsp parameter to the open call -- jpeach
66 Also include kernel_flock call - jmcd */
67 /* Changed to version 19, kernel change notify has been merged
68 Also included linux setlease call - jmcd */
69 /* Changed to version 20, use ntimes call instead of utime (greater
70 * timestamp resolition. JRA. */
71 /* Changed to version21 to add chflags operation -- jpeach */
72 /* Changed to version22 to add lchown operation -- jra */
73 /* Leave at 22 - not yet released. But change set_nt_acl to return an NTSTATUS. jra. */
74 /* Leave at 22 - not yet released. Add file_id_create operation. --metze */
75 /* Leave at 22 - not yet released. Change all BOOL parameters (int) to bool. jra. */
76 /* Leave at 22 - not yet released. Added recvfile. */
77 /* Leave at 22 - not yet released. Change get_nt_acl to return NTSTATUS - vl */
78 /* Leave at 22 - not yet released. Change get_nt_acl to *not* take a
79 * files_struct. - obnox.*/
80 /* Leave at 22 - not yet released. Remove parameter fd from fget_nt_acl. - obnox */
81 /* Leave at 22 - not yet released. Remove parameter fd from gset_nt_acl. - obnox */
82 /* Leave at 22 - not yet released. Remove parameter fd from pread. - obnox */
83 /* Leave at 22 - not yet released. Remove parameter fd from pwrite. - obnox */
84 /* Leave at 22 - not yet released. Remove parameter fd from lseek. - obnox */
85 /* Leave at 22 - not yet released. Remove parameter fd from fsync. - obnox */
86 /* Leave at 22 - not yet released. Remove parameter fd from fstat. - obnox */
87 /* Leave at 22 - not yet released. Remove parameter fd from fchmod. - obnox */
88 /* Leave at 22 - not yet released. Remove parameter fd from fchown. - obnox */
89 /* Leave at 22 - not yet released. Remove parameter fd from ftruncate. - obnox */
90 /* Leave at 22 - not yet released. Remove parameter fd from lock. - obnox */
91 /* Leave at 22 - not yet released. Remove parameter fd from kernel_flock. - obnox */
92 /* Leave at 22 - not yet released. Remove parameter fd from linux_setlease. - obnox */
93 /* Leave at 22 - not yet released. Remove parameter fd from getlock. - obnox */
96 #define SMB_VFS_INTERFACE_VERSION 22
99 /* to bug old modules which are trying to compile with the old functions */
100 #define vfs_init __ERROR_please_port_this_module_to_SMB_VFS_INTERFACE_VERSION_8_donot_use_vfs_init_anymore(void) { __ERROR_please_port_this_module_to_SMB_VFS_INTERFACE_VERSION_8_donot_use_vfs_init_anymore };
101 #define lp_parm_string __ERROR_please_port_lp_parm_string_to_lp_parm_const_string_or_lp_parm_talloc_string { \
102 __ERROR_please_port_lp_parm_string_to_lp_parm_const_string_or_lp_parm_talloc_string };
103 #define lp_vfs_options __ERROR_please_donot_use_lp_vfs_options_anymore_use_lp_parm_xxxx_functions_instead { \
104 __ERROR_please_donot_use_lp_vfs_options_anymore_use_lp_parm_xxxx_functions_instead };
107 All intercepted VFS operations must be declared as static functions inside module source
108 in order to keep smbd namespace unpolluted. See source of audit, extd_audit, fake_perms and recycle
109 example VFS modules for more details.
112 /* VFS operations structure */
114 struct vfs_handle_struct;
115 struct connection_struct;
117 struct security_descriptor;
118 struct vfs_statvfs_struct;
121 Available VFS operations. These values must be in sync with vfs_ops struct
122 (struct vfs_fn_pointers and struct vfs_handle_pointers inside of struct vfs_ops).
123 In particular, if new operations are added to vfs_ops, appropriate constants
124 should be added to vfs_op_type so that order of them kept same as in vfs_ops.
127 typedef enum _vfs_op_type {
128 SMB_VFS_OP_NOOP = -1,
130 /* Disk operations */
132 SMB_VFS_OP_CONNECT = 0,
133 SMB_VFS_OP_DISCONNECT,
134 SMB_VFS_OP_DISK_FREE,
135 SMB_VFS_OP_GET_QUOTA,
136 SMB_VFS_OP_SET_QUOTA,
137 SMB_VFS_OP_GET_SHADOW_COPY_DATA,
140 /* Directory operations */
146 SMB_VFS_OP_REWINDDIR,
151 /* File operations */
176 SMB_VFS_OP_FTRUNCATE,
178 SMB_VFS_OP_KERNEL_FLOCK,
179 SMB_VFS_OP_LINUX_SETLEASE,
186 SMB_VFS_OP_NOTIFY_WATCH,
188 SMB_VFS_OP_FILE_ID_CREATE,
190 /* NT ACL operations. */
192 SMB_VFS_OP_FGET_NT_ACL,
193 SMB_VFS_OP_GET_NT_ACL,
194 SMB_VFS_OP_FSET_NT_ACL,
195 SMB_VFS_OP_SET_NT_ACL,
197 /* POSIX ACL operations. */
199 SMB_VFS_OP_CHMOD_ACL,
200 SMB_VFS_OP_FCHMOD_ACL,
202 SMB_VFS_OP_SYS_ACL_GET_ENTRY,
203 SMB_VFS_OP_SYS_ACL_GET_TAG_TYPE,
204 SMB_VFS_OP_SYS_ACL_GET_PERMSET,
205 SMB_VFS_OP_SYS_ACL_GET_QUALIFIER,
206 SMB_VFS_OP_SYS_ACL_GET_FILE,
207 SMB_VFS_OP_SYS_ACL_GET_FD,
208 SMB_VFS_OP_SYS_ACL_CLEAR_PERMS,
209 SMB_VFS_OP_SYS_ACL_ADD_PERM,
210 SMB_VFS_OP_SYS_ACL_TO_TEXT,
211 SMB_VFS_OP_SYS_ACL_INIT,
212 SMB_VFS_OP_SYS_ACL_CREATE_ENTRY,
213 SMB_VFS_OP_SYS_ACL_SET_TAG_TYPE,
214 SMB_VFS_OP_SYS_ACL_SET_QUALIFIER,
215 SMB_VFS_OP_SYS_ACL_SET_PERMSET,
216 SMB_VFS_OP_SYS_ACL_VALID,
217 SMB_VFS_OP_SYS_ACL_SET_FILE,
218 SMB_VFS_OP_SYS_ACL_SET_FD,
219 SMB_VFS_OP_SYS_ACL_DELETE_DEF_FILE,
220 SMB_VFS_OP_SYS_ACL_GET_PERM,
221 SMB_VFS_OP_SYS_ACL_FREE_TEXT,
222 SMB_VFS_OP_SYS_ACL_FREE_ACL,
223 SMB_VFS_OP_SYS_ACL_FREE_QUALIFIER,
227 SMB_VFS_OP_LGETXATTR,
228 SMB_VFS_OP_FGETXATTR,
229 SMB_VFS_OP_LISTXATTR,
230 SMB_VFS_OP_LLISTXATTR,
231 SMB_VFS_OP_FLISTXATTR,
232 SMB_VFS_OP_REMOVEXATTR,
233 SMB_VFS_OP_LREMOVEXATTR,
234 SMB_VFS_OP_FREMOVEXATTR,
236 SMB_VFS_OP_LSETXATTR,
237 SMB_VFS_OP_FSETXATTR,
241 SMB_VFS_OP_AIO_WRITE,
242 SMB_VFS_OP_AIO_RETURN,
243 SMB_VFS_OP_AIO_CANCEL,
244 SMB_VFS_OP_AIO_ERROR,
245 SMB_VFS_OP_AIO_FSYNC,
246 SMB_VFS_OP_AIO_SUSPEND,
248 /* This should always be last enum value */
254 Please keep vfs_op_type, struct vfs_fn_pointers and struct vfs_handles_pointers in sync.
257 struct vfs_fn_pointers {
258 /* Disk operations */
260 int (*connect_fn)(struct vfs_handle_struct *handle, const char *service, const char *user);
261 void (*disconnect)(struct vfs_handle_struct *handle);
262 SMB_BIG_UINT (*disk_free)(struct vfs_handle_struct *handle, const char *path, bool small_query, SMB_BIG_UINT *bsize,
263 SMB_BIG_UINT *dfree, SMB_BIG_UINT *dsize);
264 int (*get_quota)(struct vfs_handle_struct *handle, enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *qt);
265 int (*set_quota)(struct vfs_handle_struct *handle, enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *qt);
266 int (*get_shadow_copy_data)(struct vfs_handle_struct *handle, struct files_struct *fsp, SHADOW_COPY_DATA *shadow_copy_data, bool labels);
267 int (*statvfs)(struct vfs_handle_struct *handle, const char *path, struct vfs_statvfs_struct *statbuf);
269 /* Directory operations */
271 SMB_STRUCT_DIR *(*opendir)(struct vfs_handle_struct *handle, const char *fname, const char *mask, uint32 attributes);
272 SMB_STRUCT_DIRENT *(*readdir)(struct vfs_handle_struct *handle, SMB_STRUCT_DIR *dirp);
273 void (*seekdir)(struct vfs_handle_struct *handle, SMB_STRUCT_DIR *dirp, long offset);
274 long (*telldir)(struct vfs_handle_struct *handle, SMB_STRUCT_DIR *dirp);
275 void (*rewind_dir)(struct vfs_handle_struct *handle, SMB_STRUCT_DIR *dirp);
276 int (*mkdir)(struct vfs_handle_struct *handle, const char *path, mode_t mode);
277 int (*rmdir)(struct vfs_handle_struct *handle, const char *path);
278 int (*closedir)(struct vfs_handle_struct *handle, SMB_STRUCT_DIR *dir);
280 /* File operations */
282 int (*open)(struct vfs_handle_struct *handle, const char *fname, files_struct *fsp, int flags, mode_t mode);
283 int (*close_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd);
284 ssize_t (*read)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd, void *data, size_t n);
285 ssize_t (*pread)(struct vfs_handle_struct *handle, struct files_struct *fsp, void *data, size_t n, SMB_OFF_T offset);
286 ssize_t (*write)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd, const void *data, size_t n);
287 ssize_t (*pwrite)(struct vfs_handle_struct *handle, struct files_struct *fsp, const void *data, size_t n, SMB_OFF_T offset);
288 SMB_OFF_T (*lseek)(struct vfs_handle_struct *handle, struct files_struct *fsp, SMB_OFF_T offset, int whence);
289 ssize_t (*sendfile)(struct vfs_handle_struct *handle, int tofd, files_struct *fsp, int fromfd, const DATA_BLOB *header, SMB_OFF_T offset, size_t count);
290 ssize_t (*recvfile)(struct vfs_handle_struct *handle, int fromfd, files_struct *fsp, int tofd, SMB_OFF_T offset, size_t count);
291 int (*rename)(struct vfs_handle_struct *handle, const char *oldname, const char *newname);
292 int (*fsync)(struct vfs_handle_struct *handle, struct files_struct *fsp);
293 int (*stat)(struct vfs_handle_struct *handle, const char *fname, SMB_STRUCT_STAT *sbuf);
294 int (*fstat)(struct vfs_handle_struct *handle, struct files_struct *fsp, SMB_STRUCT_STAT *sbuf);
295 int (*lstat)(struct vfs_handle_struct *handle, const char *path, SMB_STRUCT_STAT *sbuf);
296 int (*unlink)(struct vfs_handle_struct *handle, const char *path);
297 int (*chmod)(struct vfs_handle_struct *handle, const char *path, mode_t mode);
298 int (*fchmod)(struct vfs_handle_struct *handle, struct files_struct *fsp, mode_t mode);
299 int (*chown)(struct vfs_handle_struct *handle, const char *path, uid_t uid, gid_t gid);
300 int (*fchown)(struct vfs_handle_struct *handle, struct files_struct *fsp, uid_t uid, gid_t gid);
301 int (*lchown)(struct vfs_handle_struct *handle, const char *path, uid_t uid, gid_t gid);
302 int (*chdir)(struct vfs_handle_struct *handle, const char *path);
303 char *(*getwd)(struct vfs_handle_struct *handle, char *buf);
304 int (*ntimes)(struct vfs_handle_struct *handle, const char *path, const struct timespec ts[2]);
305 int (*ftruncate)(struct vfs_handle_struct *handle, struct files_struct *fsp, SMB_OFF_T offset);
306 bool (*lock)(struct vfs_handle_struct *handle, struct files_struct *fsp, int op, SMB_OFF_T offset, SMB_OFF_T count, int type);
307 int (*kernel_flock)(struct vfs_handle_struct *handle, struct files_struct *fsp, uint32 share_mode);
308 int (*linux_setlease)(struct vfs_handle_struct *handle, struct files_struct *fsp, int leasetype);
309 bool (*getlock)(struct vfs_handle_struct *handle, struct files_struct *fsp, SMB_OFF_T *poffset, SMB_OFF_T *pcount, int *ptype, pid_t *ppid);
310 int (*symlink)(struct vfs_handle_struct *handle, const char *oldpath, const char *newpath);
311 int (*readlink)(struct vfs_handle_struct *handle, const char *path, char *buf, size_t bufsiz);
312 int (*link)(struct vfs_handle_struct *handle, const char *oldpath, const char *newpath);
313 int (*mknod)(struct vfs_handle_struct *handle, const char *path, mode_t mode, SMB_DEV_T dev);
314 char *(*realpath)(struct vfs_handle_struct *handle, const char *path, char *resolved_path);
315 NTSTATUS (*notify_watch)(struct vfs_handle_struct *handle,
316 struct sys_notify_context *ctx,
317 struct notify_entry *e,
318 void (*callback)(struct sys_notify_context *ctx,
320 struct notify_event *ev),
321 void *private_data, void *handle_p);
322 int (*chflags)(struct vfs_handle_struct *handle, const char *path, unsigned int flags);
323 struct file_id (*file_id_create)(struct vfs_handle_struct *handle, SMB_DEV_T dev, SMB_INO_T inode);
325 /* NT ACL operations. */
327 NTSTATUS (*fget_nt_acl)(struct vfs_handle_struct *handle,
328 struct files_struct *fsp,
329 uint32 security_info,
330 struct security_descriptor **ppdesc);
331 NTSTATUS (*get_nt_acl)(struct vfs_handle_struct *handle,
333 uint32 security_info,
334 struct security_descriptor **ppdesc);
335 NTSTATUS (*fset_nt_acl)(struct vfs_handle_struct *handle,
336 struct files_struct *fsp,
337 uint32 security_info_sent,
338 struct security_descriptor *psd);
339 NTSTATUS (*set_nt_acl)(struct vfs_handle_struct *handle,
340 struct files_struct *fsp,
342 uint32 security_info_sent,
343 struct security_descriptor *psd);
345 /* POSIX ACL operations. */
347 int (*chmod_acl)(struct vfs_handle_struct *handle, const char *name, mode_t mode);
348 int (*fchmod_acl)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd, mode_t mode);
350 int (*sys_acl_get_entry)(struct vfs_handle_struct *handle, SMB_ACL_T theacl, int entry_id, SMB_ACL_ENTRY_T *entry_p);
351 int (*sys_acl_get_tag_type)(struct vfs_handle_struct *handle, SMB_ACL_ENTRY_T entry_d, SMB_ACL_TAG_T *tag_type_p);
352 int (*sys_acl_get_permset)(struct vfs_handle_struct *handle, SMB_ACL_ENTRY_T entry_d, SMB_ACL_PERMSET_T *permset_p);
353 void * (*sys_acl_get_qualifier)(struct vfs_handle_struct *handle, SMB_ACL_ENTRY_T entry_d);
354 SMB_ACL_T (*sys_acl_get_file)(struct vfs_handle_struct *handle, const char *path_p, SMB_ACL_TYPE_T type);
355 SMB_ACL_T (*sys_acl_get_fd)(struct vfs_handle_struct *handle, struct files_struct *fsp);
356 int (*sys_acl_clear_perms)(struct vfs_handle_struct *handle, SMB_ACL_PERMSET_T permset);
357 int (*sys_acl_add_perm)(struct vfs_handle_struct *handle, SMB_ACL_PERMSET_T permset, SMB_ACL_PERM_T perm);
358 char * (*sys_acl_to_text)(struct vfs_handle_struct *handle, SMB_ACL_T theacl, ssize_t *plen);
359 SMB_ACL_T (*sys_acl_init)(struct vfs_handle_struct *handle, int count);
360 int (*sys_acl_create_entry)(struct vfs_handle_struct *handle, SMB_ACL_T *pacl, SMB_ACL_ENTRY_T *pentry);
361 int (*sys_acl_set_tag_type)(struct vfs_handle_struct *handle, SMB_ACL_ENTRY_T entry, SMB_ACL_TAG_T tagtype);
362 int (*sys_acl_set_qualifier)(struct vfs_handle_struct *handle, SMB_ACL_ENTRY_T entry, void *qual);
363 int (*sys_acl_set_permset)(struct vfs_handle_struct *handle, SMB_ACL_ENTRY_T entry, SMB_ACL_PERMSET_T permset);
364 int (*sys_acl_valid)(struct vfs_handle_struct *handle, SMB_ACL_T theacl );
365 int (*sys_acl_set_file)(struct vfs_handle_struct *handle, const char *name, SMB_ACL_TYPE_T acltype, SMB_ACL_T theacl);
366 int (*sys_acl_set_fd)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd, SMB_ACL_T theacl);
367 int (*sys_acl_delete_def_file)(struct vfs_handle_struct *handle, const char *path);
368 int (*sys_acl_get_perm)(struct vfs_handle_struct *handle, SMB_ACL_PERMSET_T permset, SMB_ACL_PERM_T perm);
369 int (*sys_acl_free_text)(struct vfs_handle_struct *handle, char *text);
370 int (*sys_acl_free_acl)(struct vfs_handle_struct *handle, SMB_ACL_T posix_acl);
371 int (*sys_acl_free_qualifier)(struct vfs_handle_struct *handle, void *qualifier, SMB_ACL_TAG_T tagtype);
374 ssize_t (*getxattr)(struct vfs_handle_struct *handle,const char *path, const char *name, void *value, size_t size);
375 ssize_t (*lgetxattr)(struct vfs_handle_struct *handle,const char *path, const char *name, void *value, size_t size);
376 ssize_t (*fgetxattr)(struct vfs_handle_struct *handle, struct files_struct *fsp,int fd, const char *name, void *value, size_t size);
377 ssize_t (*listxattr)(struct vfs_handle_struct *handle, const char *path, char *list, size_t size);
378 ssize_t (*llistxattr)(struct vfs_handle_struct *handle, const char *path, char *list, size_t size);
379 ssize_t (*flistxattr)(struct vfs_handle_struct *handle, struct files_struct *fsp,int fd, char *list, size_t size);
380 int (*removexattr)(struct vfs_handle_struct *handle, const char *path, const char *name);
381 int (*lremovexattr)(struct vfs_handle_struct *handle, const char *path, const char *name);
382 int (*fremovexattr)(struct vfs_handle_struct *handle, struct files_struct *fsp,int filedes, const char *name);
383 int (*setxattr)(struct vfs_handle_struct *handle, const char *path, const char *name, const void *value, size_t size, int flags);
384 int (*lsetxattr)(struct vfs_handle_struct *handle, const char *path, const char *name, const void *value, size_t size, int flags);
385 int (*fsetxattr)(struct vfs_handle_struct *handle, struct files_struct *fsp,int filedes, const char *name, const void *value, size_t size, int flags);
388 int (*aio_read)(struct vfs_handle_struct *handle, struct files_struct *fsp, SMB_STRUCT_AIOCB *aiocb);
389 int (*aio_write)(struct vfs_handle_struct *handle, struct files_struct *fsp, SMB_STRUCT_AIOCB *aiocb);
390 ssize_t (*aio_return_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, SMB_STRUCT_AIOCB *aiocb);
391 int (*aio_cancel)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd, SMB_STRUCT_AIOCB *aiocb);
392 int (*aio_error_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, SMB_STRUCT_AIOCB *aiocb);
393 int (*aio_fsync)(struct vfs_handle_struct *handle, struct files_struct *fsp, int op, SMB_STRUCT_AIOCB *aiocb);
394 int (*aio_suspend)(struct vfs_handle_struct *handle, struct files_struct *fsp, const SMB_STRUCT_AIOCB * const aiocb[], int n, const struct timespec *timeout);
398 struct vfs_handles_pointers {
399 /* Disk operations */
401 struct vfs_handle_struct *connect_hnd;
402 struct vfs_handle_struct *disconnect;
403 struct vfs_handle_struct *disk_free;
404 struct vfs_handle_struct *get_quota;
405 struct vfs_handle_struct *set_quota;
406 struct vfs_handle_struct *get_shadow_copy_data;
407 struct vfs_handle_struct *statvfs;
409 /* Directory operations */
411 struct vfs_handle_struct *opendir;
412 struct vfs_handle_struct *readdir;
413 struct vfs_handle_struct *seekdir;
414 struct vfs_handle_struct *telldir;
415 struct vfs_handle_struct *rewind_dir;
416 struct vfs_handle_struct *mkdir;
417 struct vfs_handle_struct *rmdir;
418 struct vfs_handle_struct *closedir;
420 /* File operations */
422 struct vfs_handle_struct *open;
423 struct vfs_handle_struct *close_hnd;
424 struct vfs_handle_struct *read;
425 struct vfs_handle_struct *pread;
426 struct vfs_handle_struct *write;
427 struct vfs_handle_struct *pwrite;
428 struct vfs_handle_struct *lseek;
429 struct vfs_handle_struct *sendfile;
430 struct vfs_handle_struct *recvfile;
431 struct vfs_handle_struct *rename;
432 struct vfs_handle_struct *fsync;
433 struct vfs_handle_struct *stat;
434 struct vfs_handle_struct *fstat;
435 struct vfs_handle_struct *lstat;
436 struct vfs_handle_struct *unlink;
437 struct vfs_handle_struct *chmod;
438 struct vfs_handle_struct *fchmod;
439 struct vfs_handle_struct *chown;
440 struct vfs_handle_struct *fchown;
441 struct vfs_handle_struct *lchown;
442 struct vfs_handle_struct *chdir;
443 struct vfs_handle_struct *getwd;
444 struct vfs_handle_struct *ntimes;
445 struct vfs_handle_struct *ftruncate;
446 struct vfs_handle_struct *lock;
447 struct vfs_handle_struct *kernel_flock;
448 struct vfs_handle_struct *linux_setlease;
449 struct vfs_handle_struct *getlock;
450 struct vfs_handle_struct *symlink;
451 struct vfs_handle_struct *readlink;
452 struct vfs_handle_struct *link;
453 struct vfs_handle_struct *mknod;
454 struct vfs_handle_struct *realpath;
455 struct vfs_handle_struct *notify_watch;
456 struct vfs_handle_struct *chflags;
457 struct vfs_handle_struct *file_id_create;
459 /* NT ACL operations. */
461 struct vfs_handle_struct *fget_nt_acl;
462 struct vfs_handle_struct *get_nt_acl;
463 struct vfs_handle_struct *fset_nt_acl;
464 struct vfs_handle_struct *set_nt_acl;
466 /* POSIX ACL operations. */
468 struct vfs_handle_struct *chmod_acl;
469 struct vfs_handle_struct *fchmod_acl;
471 struct vfs_handle_struct *sys_acl_get_entry;
472 struct vfs_handle_struct *sys_acl_get_tag_type;
473 struct vfs_handle_struct *sys_acl_get_permset;
474 struct vfs_handle_struct *sys_acl_get_qualifier;
475 struct vfs_handle_struct *sys_acl_get_file;
476 struct vfs_handle_struct *sys_acl_get_fd;
477 struct vfs_handle_struct *sys_acl_clear_perms;
478 struct vfs_handle_struct *sys_acl_add_perm;
479 struct vfs_handle_struct *sys_acl_to_text;
480 struct vfs_handle_struct *sys_acl_init;
481 struct vfs_handle_struct *sys_acl_create_entry;
482 struct vfs_handle_struct *sys_acl_set_tag_type;
483 struct vfs_handle_struct *sys_acl_set_qualifier;
484 struct vfs_handle_struct *sys_acl_set_permset;
485 struct vfs_handle_struct *sys_acl_valid;
486 struct vfs_handle_struct *sys_acl_set_file;
487 struct vfs_handle_struct *sys_acl_set_fd;
488 struct vfs_handle_struct *sys_acl_delete_def_file;
489 struct vfs_handle_struct *sys_acl_get_perm;
490 struct vfs_handle_struct *sys_acl_free_text;
491 struct vfs_handle_struct *sys_acl_free_acl;
492 struct vfs_handle_struct *sys_acl_free_qualifier;
495 struct vfs_handle_struct *getxattr;
496 struct vfs_handle_struct *lgetxattr;
497 struct vfs_handle_struct *fgetxattr;
498 struct vfs_handle_struct *listxattr;
499 struct vfs_handle_struct *llistxattr;
500 struct vfs_handle_struct *flistxattr;
501 struct vfs_handle_struct *removexattr;
502 struct vfs_handle_struct *lremovexattr;
503 struct vfs_handle_struct *fremovexattr;
504 struct vfs_handle_struct *setxattr;
505 struct vfs_handle_struct *lsetxattr;
506 struct vfs_handle_struct *fsetxattr;
509 struct vfs_handle_struct *aio_read;
510 struct vfs_handle_struct *aio_write;
511 struct vfs_handle_struct *aio_return;
512 struct vfs_handle_struct *aio_cancel;
513 struct vfs_handle_struct *aio_error;
514 struct vfs_handle_struct *aio_fsync;
515 struct vfs_handle_struct *aio_suspend;
520 Possible VFS operation layers (per-operation)
522 These values are used by VFS subsystem when building vfs_ops for connection
523 from multiple VFS modules. Internally, Samba differentiates only opaque and
524 transparent layers at this process. Other types are used for providing better
525 diagnosing facilities.
527 Most modules will provide transparent layers. Opaque layer is for modules
528 which implement actual file system calls (like DB-based VFS). For example,
529 default POSIX VFS which is built in into Samba is an opaque VFS module.
531 Other layer types (audit, splitter, scanner) were designed to provide different
532 degree of transparency and for diagnosing VFS module behaviour.
534 Each module can implement several layers at the same time provided that only
535 one layer is used per each operation.
539 typedef enum _vfs_op_layer {
540 SMB_VFS_LAYER_NOOP = -1, /* - For using in VFS module to indicate end of array */
541 /* of operations description */
542 SMB_VFS_LAYER_OPAQUE = 0, /* - Final level, does not call anything beyond itself */
543 SMB_VFS_LAYER_TRANSPARENT, /* - Normal operation, calls underlying layer after */
544 /* possibly changing passed data */
545 SMB_VFS_LAYER_LOGGER, /* - Logs data, calls underlying layer, logging may not */
547 SMB_VFS_LAYER_SPLITTER, /* - Splits operation, calls underlying layer _and_ own facility, */
548 /* then combines result */
549 SMB_VFS_LAYER_SCANNER /* - Checks data and possibly initiates additional */
550 /* file activity like logging to files _inside_ samba VFS */
554 VFS operation description. Each VFS module registers an array of vfs_op_tuple to VFS subsystem,
555 which describes all operations this module is willing to intercept.
556 VFS subsystem initializes then the conn->vfs_ops and conn->vfs_opaque_ops structs
557 using this information.
560 typedef struct vfs_op_tuple {
567 typedef struct vfs_handle_struct {
568 struct vfs_handle_struct *next, *prev;
570 struct vfs_ops vfs_next;
571 struct connection_struct *conn;
573 void (*free_data)(void **data);
577 typedef struct vfs_statvfs_struct {
578 /* For undefined recommended transfer size return -1 in that field */
579 uint32 OptimalTransferSize; /* bsize on some os, iosize on other os */
583 The next three fields are in terms of the block size.
584 (above). If block size is unknown, 4096 would be a
585 reasonable block size for a server to report.
586 Note that returning the blocks/blocksavail removes need
587 to make a second call (to QFSInfo level 0x103 to get this info.
588 UserBlockAvail is typically less than or equal to BlocksAvail,
589 if no distinction is made return the same value in each.
592 SMB_BIG_UINT TotalBlocks;
593 SMB_BIG_UINT BlocksAvail; /* bfree */
594 SMB_BIG_UINT UserBlocksAvail; /* bavail */
596 /* For undefined Node fields or FSID return -1 */
597 SMB_BIG_UINT TotalFileNodes;
598 SMB_BIG_UINT FreeFileNodes;
599 SMB_BIG_UINT FsIdentifier; /* fsid */
600 /* NB Namelen comes from FILE_SYSTEM_ATTRIBUTE_INFO call */
601 /* NB flags can come from FILE_SYSTEM_DEVICE_INFO call */
604 } vfs_statvfs_struct;
606 /* Add a new FSP extension of the given type. Returns a pointer to the
609 #define VFS_ADD_FSP_EXTENSION(handle, fsp, type) \
610 vfs_add_fsp_extension_notype(handle, (fsp), sizeof(type))
612 /* Return a pointer to the existing FSP extension data. */
613 #define VFS_FETCH_FSP_EXTENSION(handle, fsp) \
614 vfs_fetch_fsp_extension(handle, (fsp))
616 /* Return the talloc context associated with an FSP extension. */
617 #define VFS_MEMCTX_FSP_EXTENSION(handle, fsp) \
618 vfs_memctx_fsp_extension(handle, (fsp))
620 /* Remove and destroy an FSP extension. */
621 #define VFS_REMOVE_FSP_EXTENSION(handle, fsp) \
622 vfs_remove_fsp_extension((handle), (fsp))
624 #define SMB_VFS_HANDLE_GET_DATA(handle, datap, type, ret) { \
625 if (!(handle)||((datap=(type *)(handle)->data)==NULL)) { \
626 DEBUG(0,("%s() failed to get vfs_handle->data!\n",FUNCTION_MACRO)); \
631 #define SMB_VFS_HANDLE_SET_DATA(handle, datap, free_fn, type, ret) { \
633 DEBUG(0,("%s() failed to set handle->data!\n",FUNCTION_MACRO)); \
636 if ((handle)->free_data) { \
637 (handle)->free_data(&(handle)->data); \
639 (handle)->data = (void *)datap; \
640 (handle)->free_data = free_fn; \
644 #define SMB_VFS_HANDLE_FREE_DATA(handle) { \
645 if ((handle) && (handle)->free_data) { \
646 (handle)->free_data(&(handle)->data); \
650 /* Check whether module-specific data handle was already allocated or not */
651 #define SMB_VFS_HANDLE_TEST_DATA(handle) ( !(handle) || !(handle)->data ? False : True )
653 #define SMB_VFS_OP(x) ((void *) x)
655 #define DEFAULT_VFS_MODULE_NAME "/[Default VFS]/"
657 #include "vfs_macros.h"