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 */
82 #define SMB_VFS_INTERFACE_VERSION 22
85 /* to bug old modules which are trying to compile with the old functions */
86 #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 };
87 #define lp_parm_string __ERROR_please_port_lp_parm_string_to_lp_parm_const_string_or_lp_parm_talloc_string { \
88 __ERROR_please_port_lp_parm_string_to_lp_parm_const_string_or_lp_parm_talloc_string };
89 #define lp_vfs_options __ERROR_please_donot_use_lp_vfs_options_anymore_use_lp_parm_xxxx_functions_instead { \
90 __ERROR_please_donot_use_lp_vfs_options_anymore_use_lp_parm_xxxx_functions_instead };
93 All intercepted VFS operations must be declared as static functions inside module source
94 in order to keep smbd namespace unpolluted. See source of audit, extd_audit, fake_perms and recycle
95 example VFS modules for more details.
98 /* VFS operations structure */
100 struct vfs_handle_struct;
101 struct connection_struct;
103 struct security_descriptor;
104 struct vfs_statvfs_struct;
107 Available VFS operations. These values must be in sync with vfs_ops struct
108 (struct vfs_fn_pointers and struct vfs_handle_pointers inside of struct vfs_ops).
109 In particular, if new operations are added to vfs_ops, appropriate constants
110 should be added to vfs_op_type so that order of them kept same as in vfs_ops.
113 typedef enum _vfs_op_type {
114 SMB_VFS_OP_NOOP = -1,
116 /* Disk operations */
118 SMB_VFS_OP_CONNECT = 0,
119 SMB_VFS_OP_DISCONNECT,
120 SMB_VFS_OP_DISK_FREE,
121 SMB_VFS_OP_GET_QUOTA,
122 SMB_VFS_OP_SET_QUOTA,
123 SMB_VFS_OP_GET_SHADOW_COPY_DATA,
126 /* Directory operations */
132 SMB_VFS_OP_REWINDDIR,
137 /* File operations */
162 SMB_VFS_OP_FTRUNCATE,
164 SMB_VFS_OP_KERNEL_FLOCK,
165 SMB_VFS_OP_LINUX_SETLEASE,
172 SMB_VFS_OP_NOTIFY_WATCH,
174 SMB_VFS_OP_FILE_ID_CREATE,
176 /* NT ACL operations. */
178 SMB_VFS_OP_FGET_NT_ACL,
179 SMB_VFS_OP_GET_NT_ACL,
180 SMB_VFS_OP_FSET_NT_ACL,
181 SMB_VFS_OP_SET_NT_ACL,
183 /* POSIX ACL operations. */
185 SMB_VFS_OP_CHMOD_ACL,
186 SMB_VFS_OP_FCHMOD_ACL,
188 SMB_VFS_OP_SYS_ACL_GET_ENTRY,
189 SMB_VFS_OP_SYS_ACL_GET_TAG_TYPE,
190 SMB_VFS_OP_SYS_ACL_GET_PERMSET,
191 SMB_VFS_OP_SYS_ACL_GET_QUALIFIER,
192 SMB_VFS_OP_SYS_ACL_GET_FILE,
193 SMB_VFS_OP_SYS_ACL_GET_FD,
194 SMB_VFS_OP_SYS_ACL_CLEAR_PERMS,
195 SMB_VFS_OP_SYS_ACL_ADD_PERM,
196 SMB_VFS_OP_SYS_ACL_TO_TEXT,
197 SMB_VFS_OP_SYS_ACL_INIT,
198 SMB_VFS_OP_SYS_ACL_CREATE_ENTRY,
199 SMB_VFS_OP_SYS_ACL_SET_TAG_TYPE,
200 SMB_VFS_OP_SYS_ACL_SET_QUALIFIER,
201 SMB_VFS_OP_SYS_ACL_SET_PERMSET,
202 SMB_VFS_OP_SYS_ACL_VALID,
203 SMB_VFS_OP_SYS_ACL_SET_FILE,
204 SMB_VFS_OP_SYS_ACL_SET_FD,
205 SMB_VFS_OP_SYS_ACL_DELETE_DEF_FILE,
206 SMB_VFS_OP_SYS_ACL_GET_PERM,
207 SMB_VFS_OP_SYS_ACL_FREE_TEXT,
208 SMB_VFS_OP_SYS_ACL_FREE_ACL,
209 SMB_VFS_OP_SYS_ACL_FREE_QUALIFIER,
213 SMB_VFS_OP_LGETXATTR,
214 SMB_VFS_OP_FGETXATTR,
215 SMB_VFS_OP_LISTXATTR,
216 SMB_VFS_OP_LLISTXATTR,
217 SMB_VFS_OP_FLISTXATTR,
218 SMB_VFS_OP_REMOVEXATTR,
219 SMB_VFS_OP_LREMOVEXATTR,
220 SMB_VFS_OP_FREMOVEXATTR,
222 SMB_VFS_OP_LSETXATTR,
223 SMB_VFS_OP_FSETXATTR,
227 SMB_VFS_OP_AIO_WRITE,
228 SMB_VFS_OP_AIO_RETURN,
229 SMB_VFS_OP_AIO_CANCEL,
230 SMB_VFS_OP_AIO_ERROR,
231 SMB_VFS_OP_AIO_FSYNC,
232 SMB_VFS_OP_AIO_SUSPEND,
234 /* This should always be last enum value */
240 Please keep vfs_op_type, struct vfs_fn_pointers and struct vfs_handles_pointers in sync.
243 struct vfs_fn_pointers {
244 /* Disk operations */
246 int (*connect_fn)(struct vfs_handle_struct *handle, const char *service, const char *user);
247 void (*disconnect)(struct vfs_handle_struct *handle);
248 SMB_BIG_UINT (*disk_free)(struct vfs_handle_struct *handle, const char *path, bool small_query, SMB_BIG_UINT *bsize,
249 SMB_BIG_UINT *dfree, SMB_BIG_UINT *dsize);
250 int (*get_quota)(struct vfs_handle_struct *handle, enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *qt);
251 int (*set_quota)(struct vfs_handle_struct *handle, enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *qt);
252 int (*get_shadow_copy_data)(struct vfs_handle_struct *handle, struct files_struct *fsp, SHADOW_COPY_DATA *shadow_copy_data, bool labels);
253 int (*statvfs)(struct vfs_handle_struct *handle, const char *path, struct vfs_statvfs_struct *statbuf);
255 /* Directory operations */
257 SMB_STRUCT_DIR *(*opendir)(struct vfs_handle_struct *handle, const char *fname, const char *mask, uint32 attributes);
258 SMB_STRUCT_DIRENT *(*readdir)(struct vfs_handle_struct *handle, SMB_STRUCT_DIR *dirp);
259 void (*seekdir)(struct vfs_handle_struct *handle, SMB_STRUCT_DIR *dirp, long offset);
260 long (*telldir)(struct vfs_handle_struct *handle, SMB_STRUCT_DIR *dirp);
261 void (*rewind_dir)(struct vfs_handle_struct *handle, SMB_STRUCT_DIR *dirp);
262 int (*mkdir)(struct vfs_handle_struct *handle, const char *path, mode_t mode);
263 int (*rmdir)(struct vfs_handle_struct *handle, const char *path);
264 int (*closedir)(struct vfs_handle_struct *handle, SMB_STRUCT_DIR *dir);
266 /* File operations */
268 int (*open)(struct vfs_handle_struct *handle, const char *fname, files_struct *fsp, int flags, mode_t mode);
269 int (*close_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd);
270 ssize_t (*read)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd, void *data, size_t n);
271 ssize_t (*pread)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd, void *data, size_t n, SMB_OFF_T offset);
272 ssize_t (*write)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd, const void *data, size_t n);
273 ssize_t (*pwrite)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd, const void *data, size_t n, SMB_OFF_T offset);
274 SMB_OFF_T (*lseek)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd, SMB_OFF_T offset, int whence);
275 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);
276 ssize_t (*recvfile)(struct vfs_handle_struct *handle, int fromfd, files_struct *fsp, int tofd, SMB_OFF_T offset, size_t count);
277 int (*rename)(struct vfs_handle_struct *handle, const char *oldname, const char *newname);
278 int (*fsync)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd);
279 int (*stat)(struct vfs_handle_struct *handle, const char *fname, SMB_STRUCT_STAT *sbuf);
280 int (*fstat)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd, SMB_STRUCT_STAT *sbuf);
281 int (*lstat)(struct vfs_handle_struct *handle, const char *path, SMB_STRUCT_STAT *sbuf);
282 int (*unlink)(struct vfs_handle_struct *handle, const char *path);
283 int (*chmod)(struct vfs_handle_struct *handle, const char *path, mode_t mode);
284 int (*fchmod)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd, mode_t mode);
285 int (*chown)(struct vfs_handle_struct *handle, const char *path, uid_t uid, gid_t gid);
286 int (*fchown)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd, uid_t uid, gid_t gid);
287 int (*lchown)(struct vfs_handle_struct *handle, const char *path, uid_t uid, gid_t gid);
288 int (*chdir)(struct vfs_handle_struct *handle, const char *path);
289 char *(*getwd)(struct vfs_handle_struct *handle, char *buf);
290 int (*ntimes)(struct vfs_handle_struct *handle, const char *path, const struct timespec ts[2]);
291 int (*ftruncate)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd, SMB_OFF_T offset);
292 bool (*lock)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd, int op, SMB_OFF_T offset, SMB_OFF_T count, int type);
293 int (*kernel_flock)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd, uint32 share_mode);
294 int (*linux_setlease)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd, int leasetype);
295 bool (*getlock)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd, SMB_OFF_T *poffset, SMB_OFF_T *pcount, int *ptype, pid_t *ppid);
296 int (*symlink)(struct vfs_handle_struct *handle, const char *oldpath, const char *newpath);
297 int (*readlink)(struct vfs_handle_struct *handle, const char *path, char *buf, size_t bufsiz);
298 int (*link)(struct vfs_handle_struct *handle, const char *oldpath, const char *newpath);
299 int (*mknod)(struct vfs_handle_struct *handle, const char *path, mode_t mode, SMB_DEV_T dev);
300 char *(*realpath)(struct vfs_handle_struct *handle, const char *path, char *resolved_path);
301 NTSTATUS (*notify_watch)(struct vfs_handle_struct *handle,
302 struct sys_notify_context *ctx,
303 struct notify_entry *e,
304 void (*callback)(struct sys_notify_context *ctx,
306 struct notify_event *ev),
307 void *private_data, void *handle_p);
308 int (*chflags)(struct vfs_handle_struct *handle, const char *path, unsigned int flags);
309 struct file_id (*file_id_create)(struct vfs_handle_struct *handle, SMB_DEV_T dev, SMB_INO_T inode);
311 /* NT ACL operations. */
313 NTSTATUS (*fget_nt_acl)(struct vfs_handle_struct *handle,
314 struct files_struct *fsp,
315 uint32 security_info,
316 struct security_descriptor **ppdesc);
317 NTSTATUS (*get_nt_acl)(struct vfs_handle_struct *handle,
319 uint32 security_info,
320 struct security_descriptor **ppdesc);
321 NTSTATUS (*fset_nt_acl)(struct vfs_handle_struct *handle,
322 struct files_struct *fsp,
324 uint32 security_info_sent,
325 struct security_descriptor *psd);
326 NTSTATUS (*set_nt_acl)(struct vfs_handle_struct *handle,
327 struct files_struct *fsp,
329 uint32 security_info_sent,
330 struct security_descriptor *psd);
332 /* POSIX ACL operations. */
334 int (*chmod_acl)(struct vfs_handle_struct *handle, const char *name, mode_t mode);
335 int (*fchmod_acl)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd, mode_t mode);
337 int (*sys_acl_get_entry)(struct vfs_handle_struct *handle, SMB_ACL_T theacl, int entry_id, SMB_ACL_ENTRY_T *entry_p);
338 int (*sys_acl_get_tag_type)(struct vfs_handle_struct *handle, SMB_ACL_ENTRY_T entry_d, SMB_ACL_TAG_T *tag_type_p);
339 int (*sys_acl_get_permset)(struct vfs_handle_struct *handle, SMB_ACL_ENTRY_T entry_d, SMB_ACL_PERMSET_T *permset_p);
340 void * (*sys_acl_get_qualifier)(struct vfs_handle_struct *handle, SMB_ACL_ENTRY_T entry_d);
341 SMB_ACL_T (*sys_acl_get_file)(struct vfs_handle_struct *handle, const char *path_p, SMB_ACL_TYPE_T type);
342 SMB_ACL_T (*sys_acl_get_fd)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd);
343 int (*sys_acl_clear_perms)(struct vfs_handle_struct *handle, SMB_ACL_PERMSET_T permset);
344 int (*sys_acl_add_perm)(struct vfs_handle_struct *handle, SMB_ACL_PERMSET_T permset, SMB_ACL_PERM_T perm);
345 char * (*sys_acl_to_text)(struct vfs_handle_struct *handle, SMB_ACL_T theacl, ssize_t *plen);
346 SMB_ACL_T (*sys_acl_init)(struct vfs_handle_struct *handle, int count);
347 int (*sys_acl_create_entry)(struct vfs_handle_struct *handle, SMB_ACL_T *pacl, SMB_ACL_ENTRY_T *pentry);
348 int (*sys_acl_set_tag_type)(struct vfs_handle_struct *handle, SMB_ACL_ENTRY_T entry, SMB_ACL_TAG_T tagtype);
349 int (*sys_acl_set_qualifier)(struct vfs_handle_struct *handle, SMB_ACL_ENTRY_T entry, void *qual);
350 int (*sys_acl_set_permset)(struct vfs_handle_struct *handle, SMB_ACL_ENTRY_T entry, SMB_ACL_PERMSET_T permset);
351 int (*sys_acl_valid)(struct vfs_handle_struct *handle, SMB_ACL_T theacl );
352 int (*sys_acl_set_file)(struct vfs_handle_struct *handle, const char *name, SMB_ACL_TYPE_T acltype, SMB_ACL_T theacl);
353 int (*sys_acl_set_fd)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd, SMB_ACL_T theacl);
354 int (*sys_acl_delete_def_file)(struct vfs_handle_struct *handle, const char *path);
355 int (*sys_acl_get_perm)(struct vfs_handle_struct *handle, SMB_ACL_PERMSET_T permset, SMB_ACL_PERM_T perm);
356 int (*sys_acl_free_text)(struct vfs_handle_struct *handle, char *text);
357 int (*sys_acl_free_acl)(struct vfs_handle_struct *handle, SMB_ACL_T posix_acl);
358 int (*sys_acl_free_qualifier)(struct vfs_handle_struct *handle, void *qualifier, SMB_ACL_TAG_T tagtype);
361 ssize_t (*getxattr)(struct vfs_handle_struct *handle,const char *path, const char *name, void *value, size_t size);
362 ssize_t (*lgetxattr)(struct vfs_handle_struct *handle,const char *path, const char *name, void *value, size_t size);
363 ssize_t (*fgetxattr)(struct vfs_handle_struct *handle, struct files_struct *fsp,int fd, const char *name, void *value, size_t size);
364 ssize_t (*listxattr)(struct vfs_handle_struct *handle, const char *path, char *list, size_t size);
365 ssize_t (*llistxattr)(struct vfs_handle_struct *handle, const char *path, char *list, size_t size);
366 ssize_t (*flistxattr)(struct vfs_handle_struct *handle, struct files_struct *fsp,int fd, char *list, size_t size);
367 int (*removexattr)(struct vfs_handle_struct *handle, const char *path, const char *name);
368 int (*lremovexattr)(struct vfs_handle_struct *handle, const char *path, const char *name);
369 int (*fremovexattr)(struct vfs_handle_struct *handle, struct files_struct *fsp,int filedes, const char *name);
370 int (*setxattr)(struct vfs_handle_struct *handle, const char *path, const char *name, const void *value, size_t size, int flags);
371 int (*lsetxattr)(struct vfs_handle_struct *handle, const char *path, const char *name, const void *value, size_t size, int flags);
372 int (*fsetxattr)(struct vfs_handle_struct *handle, struct files_struct *fsp,int filedes, const char *name, const void *value, size_t size, int flags);
375 int (*aio_read)(struct vfs_handle_struct *handle, struct files_struct *fsp, SMB_STRUCT_AIOCB *aiocb);
376 int (*aio_write)(struct vfs_handle_struct *handle, struct files_struct *fsp, SMB_STRUCT_AIOCB *aiocb);
377 ssize_t (*aio_return_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, SMB_STRUCT_AIOCB *aiocb);
378 int (*aio_cancel)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd, SMB_STRUCT_AIOCB *aiocb);
379 int (*aio_error_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, SMB_STRUCT_AIOCB *aiocb);
380 int (*aio_fsync)(struct vfs_handle_struct *handle, struct files_struct *fsp, int op, SMB_STRUCT_AIOCB *aiocb);
381 int (*aio_suspend)(struct vfs_handle_struct *handle, struct files_struct *fsp, const SMB_STRUCT_AIOCB * const aiocb[], int n, const struct timespec *timeout);
385 struct vfs_handles_pointers {
386 /* Disk operations */
388 struct vfs_handle_struct *connect_hnd;
389 struct vfs_handle_struct *disconnect;
390 struct vfs_handle_struct *disk_free;
391 struct vfs_handle_struct *get_quota;
392 struct vfs_handle_struct *set_quota;
393 struct vfs_handle_struct *get_shadow_copy_data;
394 struct vfs_handle_struct *statvfs;
396 /* Directory operations */
398 struct vfs_handle_struct *opendir;
399 struct vfs_handle_struct *readdir;
400 struct vfs_handle_struct *seekdir;
401 struct vfs_handle_struct *telldir;
402 struct vfs_handle_struct *rewind_dir;
403 struct vfs_handle_struct *mkdir;
404 struct vfs_handle_struct *rmdir;
405 struct vfs_handle_struct *closedir;
407 /* File operations */
409 struct vfs_handle_struct *open;
410 struct vfs_handle_struct *close_hnd;
411 struct vfs_handle_struct *read;
412 struct vfs_handle_struct *pread;
413 struct vfs_handle_struct *write;
414 struct vfs_handle_struct *pwrite;
415 struct vfs_handle_struct *lseek;
416 struct vfs_handle_struct *sendfile;
417 struct vfs_handle_struct *recvfile;
418 struct vfs_handle_struct *rename;
419 struct vfs_handle_struct *fsync;
420 struct vfs_handle_struct *stat;
421 struct vfs_handle_struct *fstat;
422 struct vfs_handle_struct *lstat;
423 struct vfs_handle_struct *unlink;
424 struct vfs_handle_struct *chmod;
425 struct vfs_handle_struct *fchmod;
426 struct vfs_handle_struct *chown;
427 struct vfs_handle_struct *fchown;
428 struct vfs_handle_struct *lchown;
429 struct vfs_handle_struct *chdir;
430 struct vfs_handle_struct *getwd;
431 struct vfs_handle_struct *ntimes;
432 struct vfs_handle_struct *ftruncate;
433 struct vfs_handle_struct *lock;
434 struct vfs_handle_struct *kernel_flock;
435 struct vfs_handle_struct *linux_setlease;
436 struct vfs_handle_struct *getlock;
437 struct vfs_handle_struct *symlink;
438 struct vfs_handle_struct *readlink;
439 struct vfs_handle_struct *link;
440 struct vfs_handle_struct *mknod;
441 struct vfs_handle_struct *realpath;
442 struct vfs_handle_struct *notify_watch;
443 struct vfs_handle_struct *chflags;
444 struct vfs_handle_struct *file_id_create;
446 /* NT ACL operations. */
448 struct vfs_handle_struct *fget_nt_acl;
449 struct vfs_handle_struct *get_nt_acl;
450 struct vfs_handle_struct *fset_nt_acl;
451 struct vfs_handle_struct *set_nt_acl;
453 /* POSIX ACL operations. */
455 struct vfs_handle_struct *chmod_acl;
456 struct vfs_handle_struct *fchmod_acl;
458 struct vfs_handle_struct *sys_acl_get_entry;
459 struct vfs_handle_struct *sys_acl_get_tag_type;
460 struct vfs_handle_struct *sys_acl_get_permset;
461 struct vfs_handle_struct *sys_acl_get_qualifier;
462 struct vfs_handle_struct *sys_acl_get_file;
463 struct vfs_handle_struct *sys_acl_get_fd;
464 struct vfs_handle_struct *sys_acl_clear_perms;
465 struct vfs_handle_struct *sys_acl_add_perm;
466 struct vfs_handle_struct *sys_acl_to_text;
467 struct vfs_handle_struct *sys_acl_init;
468 struct vfs_handle_struct *sys_acl_create_entry;
469 struct vfs_handle_struct *sys_acl_set_tag_type;
470 struct vfs_handle_struct *sys_acl_set_qualifier;
471 struct vfs_handle_struct *sys_acl_set_permset;
472 struct vfs_handle_struct *sys_acl_valid;
473 struct vfs_handle_struct *sys_acl_set_file;
474 struct vfs_handle_struct *sys_acl_set_fd;
475 struct vfs_handle_struct *sys_acl_delete_def_file;
476 struct vfs_handle_struct *sys_acl_get_perm;
477 struct vfs_handle_struct *sys_acl_free_text;
478 struct vfs_handle_struct *sys_acl_free_acl;
479 struct vfs_handle_struct *sys_acl_free_qualifier;
482 struct vfs_handle_struct *getxattr;
483 struct vfs_handle_struct *lgetxattr;
484 struct vfs_handle_struct *fgetxattr;
485 struct vfs_handle_struct *listxattr;
486 struct vfs_handle_struct *llistxattr;
487 struct vfs_handle_struct *flistxattr;
488 struct vfs_handle_struct *removexattr;
489 struct vfs_handle_struct *lremovexattr;
490 struct vfs_handle_struct *fremovexattr;
491 struct vfs_handle_struct *setxattr;
492 struct vfs_handle_struct *lsetxattr;
493 struct vfs_handle_struct *fsetxattr;
496 struct vfs_handle_struct *aio_read;
497 struct vfs_handle_struct *aio_write;
498 struct vfs_handle_struct *aio_return;
499 struct vfs_handle_struct *aio_cancel;
500 struct vfs_handle_struct *aio_error;
501 struct vfs_handle_struct *aio_fsync;
502 struct vfs_handle_struct *aio_suspend;
507 Possible VFS operation layers (per-operation)
509 These values are used by VFS subsystem when building vfs_ops for connection
510 from multiple VFS modules. Internally, Samba differentiates only opaque and
511 transparent layers at this process. Other types are used for providing better
512 diagnosing facilities.
514 Most modules will provide transparent layers. Opaque layer is for modules
515 which implement actual file system calls (like DB-based VFS). For example,
516 default POSIX VFS which is built in into Samba is an opaque VFS module.
518 Other layer types (audit, splitter, scanner) were designed to provide different
519 degree of transparency and for diagnosing VFS module behaviour.
521 Each module can implement several layers at the same time provided that only
522 one layer is used per each operation.
526 typedef enum _vfs_op_layer {
527 SMB_VFS_LAYER_NOOP = -1, /* - For using in VFS module to indicate end of array */
528 /* of operations description */
529 SMB_VFS_LAYER_OPAQUE = 0, /* - Final level, does not call anything beyond itself */
530 SMB_VFS_LAYER_TRANSPARENT, /* - Normal operation, calls underlying layer after */
531 /* possibly changing passed data */
532 SMB_VFS_LAYER_LOGGER, /* - Logs data, calls underlying layer, logging may not */
534 SMB_VFS_LAYER_SPLITTER, /* - Splits operation, calls underlying layer _and_ own facility, */
535 /* then combines result */
536 SMB_VFS_LAYER_SCANNER /* - Checks data and possibly initiates additional */
537 /* file activity like logging to files _inside_ samba VFS */
541 VFS operation description. Each VFS module registers an array of vfs_op_tuple to VFS subsystem,
542 which describes all operations this module is willing to intercept.
543 VFS subsystem initializes then the conn->vfs_ops and conn->vfs_opaque_ops structs
544 using this information.
547 typedef struct vfs_op_tuple {
554 typedef struct vfs_handle_struct {
555 struct vfs_handle_struct *next, *prev;
557 struct vfs_ops vfs_next;
558 struct connection_struct *conn;
560 void (*free_data)(void **data);
564 typedef struct vfs_statvfs_struct {
565 /* For undefined recommended transfer size return -1 in that field */
566 uint32 OptimalTransferSize; /* bsize on some os, iosize on other os */
570 The next three fields are in terms of the block size.
571 (above). If block size is unknown, 4096 would be a
572 reasonable block size for a server to report.
573 Note that returning the blocks/blocksavail removes need
574 to make a second call (to QFSInfo level 0x103 to get this info.
575 UserBlockAvail is typically less than or equal to BlocksAvail,
576 if no distinction is made return the same value in each.
579 SMB_BIG_UINT TotalBlocks;
580 SMB_BIG_UINT BlocksAvail; /* bfree */
581 SMB_BIG_UINT UserBlocksAvail; /* bavail */
583 /* For undefined Node fields or FSID return -1 */
584 SMB_BIG_UINT TotalFileNodes;
585 SMB_BIG_UINT FreeFileNodes;
586 SMB_BIG_UINT FsIdentifier; /* fsid */
587 /* NB Namelen comes from FILE_SYSTEM_ATTRIBUTE_INFO call */
588 /* NB flags can come from FILE_SYSTEM_DEVICE_INFO call */
591 } vfs_statvfs_struct;
593 /* Add a new FSP extension of the given type. Returns a pointer to the
596 #define VFS_ADD_FSP_EXTENSION(handle, fsp, type) \
597 vfs_add_fsp_extension_notype(handle, (fsp), sizeof(type))
599 /* Return a pointer to the existing FSP extension data. */
600 #define VFS_FETCH_FSP_EXTENSION(handle, fsp) \
601 vfs_fetch_fsp_extension(handle, (fsp))
603 /* Return the talloc context associated with an FSP extension. */
604 #define VFS_MEMCTX_FSP_EXTENSION(handle, fsp) \
605 vfs_memctx_fsp_extension(handle, (fsp))
607 /* Remove and destroy an FSP extension. */
608 #define VFS_REMOVE_FSP_EXTENSION(handle, fsp) \
609 vfs_remove_fsp_extension((handle), (fsp))
611 #define SMB_VFS_HANDLE_GET_DATA(handle, datap, type, ret) { \
612 if (!(handle)||((datap=(type *)(handle)->data)==NULL)) { \
613 DEBUG(0,("%s() failed to get vfs_handle->data!\n",FUNCTION_MACRO)); \
618 #define SMB_VFS_HANDLE_SET_DATA(handle, datap, free_fn, type, ret) { \
620 DEBUG(0,("%s() failed to set handle->data!\n",FUNCTION_MACRO)); \
623 if ((handle)->free_data) { \
624 (handle)->free_data(&(handle)->data); \
626 (handle)->data = (void *)datap; \
627 (handle)->free_data = free_fn; \
631 #define SMB_VFS_HANDLE_FREE_DATA(handle) { \
632 if ((handle) && (handle)->free_data) { \
633 (handle)->free_data(&(handle)->data); \
637 /* Check whether module-specific data handle was already allocated or not */
638 #define SMB_VFS_HANDLE_TEST_DATA(handle) ( !(handle) || !(handle)->data ? False : True )
640 #define SMB_VFS_OP(x) ((void *) x)
642 #define DEFAULT_VFS_MODULE_NAME "/[Default VFS]/"
644 #include "vfs_macros.h"