2 Unix SMB/Netbios implementation.
3 VFS module to get and set posix acls
4 Copyright (C) Volker Lendecke 2006
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>.
21 #include "system/filesys.h"
22 #include "smbd/smbd.h"
23 #include "modules/vfs_posixacl.h"
25 /* prototypes for static functions first - for clarity */
27 static bool smb_ace_to_internal(acl_entry_t posix_ace
,
28 struct smb_acl_entry
*ace
);
29 static struct smb_acl_t
*smb_acl_to_internal(acl_t acl
, TALLOC_CTX
*mem_ctx
);
30 static int smb_acl_set_mode(acl_entry_t entry
, SMB_ACL_PERM_T perm
);
31 static acl_t
smb_acl_to_posix(const struct smb_acl_t
*acl
);
34 /* public functions - the api */
36 SMB_ACL_T
posixacl_sys_acl_get_file(vfs_handle_struct
*handle
,
41 struct smb_acl_t
*result
;
46 case SMB_ACL_TYPE_ACCESS
:
47 acl_type
= ACL_TYPE_ACCESS
;
49 case SMB_ACL_TYPE_DEFAULT
:
50 acl_type
= ACL_TYPE_DEFAULT
;
57 acl
= acl_get_file(path_p
, acl_type
);
63 result
= smb_acl_to_internal(acl
, mem_ctx
);
68 SMB_ACL_T
posixacl_sys_acl_get_fd(vfs_handle_struct
*handle
,
69 files_struct
*fsp
, TALLOC_CTX
*mem_ctx
)
71 struct smb_acl_t
*result
;
72 acl_t acl
= acl_get_fd(fsp
->fh
->fd
);
78 result
= smb_acl_to_internal(acl
, mem_ctx
);
83 int posixacl_sys_acl_set_file(vfs_handle_struct
*handle
,
92 DEBUG(10, ("Calling acl_set_file: %s, %d\n", name
, type
));
95 case SMB_ACL_TYPE_ACCESS
:
96 acl_type
= ACL_TYPE_ACCESS
;
98 case SMB_ACL_TYPE_DEFAULT
:
99 acl_type
= ACL_TYPE_DEFAULT
;
106 if ((acl
= smb_acl_to_posix(theacl
)) == NULL
) {
109 res
= acl_set_file(name
, acl_type
, acl
);
111 DEBUG(10, ("acl_set_file failed: %s\n", strerror(errno
)));
117 int posixacl_sys_acl_set_fd(vfs_handle_struct
*handle
,
122 acl_t acl
= smb_acl_to_posix(theacl
);
126 res
= acl_set_fd(fsp
->fh
->fd
, acl
);
131 int posixacl_sys_acl_delete_def_file(vfs_handle_struct
*handle
,
134 return acl_delete_def_file(path
);
138 /* private functions */
140 static bool smb_ace_to_internal(acl_entry_t posix_ace
,
141 struct smb_acl_entry
*ace
)
144 acl_permset_t permset
;
146 if (acl_get_tag_type(posix_ace
, &tag
) != 0) {
147 DEBUG(0, ("smb_acl_get_tag_type failed\n"));
153 ace
->a_type
= SMB_ACL_USER
;
156 ace
->a_type
= SMB_ACL_USER_OBJ
;
159 ace
->a_type
= SMB_ACL_GROUP
;
162 ace
->a_type
= SMB_ACL_GROUP_OBJ
;
165 ace
->a_type
= SMB_ACL_OTHER
;
168 ace
->a_type
= SMB_ACL_MASK
;
171 DEBUG(0, ("unknown tag type %d\n", (unsigned int)tag
));
174 switch(ace
->a_type
) {
176 uid_t
*puid
= (uid_t
*)acl_get_qualifier(posix_ace
);
178 DEBUG(0, ("smb_acl_get_qualifier failed\n"));
181 ace
->info
.user
.uid
= *puid
;
186 case SMB_ACL_GROUP
: {
187 gid_t
*pgid
= (uid_t
*)acl_get_qualifier(posix_ace
);
189 DEBUG(0, ("smb_acl_get_qualifier failed\n"));
192 ace
->info
.group
.gid
= *pgid
;
199 if (acl_get_permset(posix_ace
, &permset
) != 0) {
200 DEBUG(0, ("smb_acl_get_mode failed\n"));
204 #ifdef HAVE_ACL_GET_PERM_NP
205 ace
->a_perm
|= (acl_get_perm_np(permset
, ACL_READ
) ? SMB_ACL_READ
: 0);
206 ace
->a_perm
|= (acl_get_perm_np(permset
, ACL_WRITE
) ? SMB_ACL_WRITE
: 0);
207 ace
->a_perm
|= (acl_get_perm_np(permset
, ACL_EXECUTE
) ? SMB_ACL_EXECUTE
: 0);
209 ace
->a_perm
|= (acl_get_perm(permset
, ACL_READ
) ? SMB_ACL_READ
: 0);
210 ace
->a_perm
|= (acl_get_perm(permset
, ACL_WRITE
) ? SMB_ACL_WRITE
: 0);
211 ace
->a_perm
|= (acl_get_perm(permset
, ACL_EXECUTE
) ? SMB_ACL_EXECUTE
: 0);
216 static struct smb_acl_t
*smb_acl_to_internal(acl_t acl
, TALLOC_CTX
*mem_ctx
)
218 struct smb_acl_t
*result
= sys_acl_init(mem_ctx
);
219 int entry_id
= ACL_FIRST_ENTRY
;
221 if (result
== NULL
) {
224 while (acl_get_entry(acl
, entry_id
, &e
) == 1) {
226 entry_id
= ACL_NEXT_ENTRY
;
228 result
->acl
= talloc_realloc(result
, result
->acl
,
229 struct smb_acl_entry
, result
->count
+1);
230 if (result
->acl
== NULL
) {
232 DEBUG(0, ("talloc_realloc failed\n"));
237 if (!smb_ace_to_internal(e
, &result
->acl
[result
->count
])) {
247 static int smb_acl_set_mode(acl_entry_t entry
, SMB_ACL_PERM_T perm
)
250 acl_permset_t permset
;
252 if ((ret
= acl_get_permset(entry
, &permset
)) != 0) {
255 if ((ret
= acl_clear_perms(permset
)) != 0) {
258 if ((perm
& SMB_ACL_READ
) &&
259 ((ret
= acl_add_perm(permset
, ACL_READ
)) != 0)) {
262 if ((perm
& SMB_ACL_WRITE
) &&
263 ((ret
= acl_add_perm(permset
, ACL_WRITE
)) != 0)) {
266 if ((perm
& SMB_ACL_EXECUTE
) &&
267 ((ret
= acl_add_perm(permset
, ACL_EXECUTE
)) != 0)) {
270 return acl_set_permset(entry
, permset
);
273 static acl_t
smb_acl_to_posix(const struct smb_acl_t
*acl
)
278 result
= acl_init(acl
->count
);
279 if (result
== NULL
) {
280 DEBUG(10, ("acl_init failed\n"));
284 for (i
=0; i
<acl
->count
; i
++) {
285 const struct smb_acl_entry
*entry
= &acl
->acl
[i
];
289 if (acl_create_entry(&result
, &e
) != 0) {
290 DEBUG(1, ("acl_create_entry failed: %s\n",
295 switch (entry
->a_type
) {
299 case SMB_ACL_USER_OBJ
:
305 case SMB_ACL_GROUP_OBJ
:
315 DEBUG(1, ("Unknown tag value %d\n", entry
->a_type
));
319 if (acl_set_tag_type(e
, tag
) != 0) {
320 DEBUG(10, ("acl_set_tag_type(%d) failed: %s\n",
321 tag
, strerror(errno
)));
325 switch (entry
->a_type
) {
327 if (acl_set_qualifier(e
, &entry
->info
.user
.uid
) != 0) {
328 DEBUG(1, ("acl_set_qualifiier failed: %s\n",
334 if (acl_set_qualifier(e
, &entry
->info
.group
.gid
) != 0) {
335 DEBUG(1, ("acl_set_qualifiier failed: %s\n",
340 default: /* Shut up, compiler! :-) */
344 if (smb_acl_set_mode(e
, entry
->a_perm
) != 0) {
349 if (acl_valid(result
) != 0) {
350 char *acl_string
= sys_acl_to_text(acl
, NULL
);
351 DEBUG(0, ("smb_acl_to_posix: ACL %s is invalid for set (%s)\n",
352 acl_string
, strerror(errno
)));
353 SAFE_FREE(acl_string
);
360 if (result
!= NULL
) {
366 /* VFS operations structure */
368 static struct vfs_fn_pointers posixacl_fns
= {
369 .sys_acl_get_file_fn
= posixacl_sys_acl_get_file
,
370 .sys_acl_get_fd_fn
= posixacl_sys_acl_get_fd
,
371 .sys_acl_set_file_fn
= posixacl_sys_acl_set_file
,
372 .sys_acl_set_fd_fn
= posixacl_sys_acl_set_fd
,
373 .sys_acl_delete_def_file_fn
= posixacl_sys_acl_delete_def_file
,
376 NTSTATUS
vfs_posixacl_init(void);
377 NTSTATUS
vfs_posixacl_init(void)
379 return smb_register_vfs(SMB_VFS_INTERFACE_VERSION
, "posixacl",