source: branches/samba-3.2.x/source/modules/vfs_posixacl.c

Last change on this file was 133, checked in by Paul Smedley, 17 years ago

Update trunk to 3.2.0pre3
File size: 8.6 KB
Line 
1/*
2 Unix SMB/Netbios implementation.
3 VFS module to get and set posix acls
4 Copyright (C) Volker Lendecke 2006
5
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.
10
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.
15
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/>.
18*/
19
20#include "includes.h"
21
22
23/* prototypes for static functions first - for clarity */
24
25static bool smb_ace_to_internal(acl_entry_t posix_ace,
26 struct smb_acl_entry *ace);
27static struct smb_acl_t *smb_acl_to_internal(acl_t acl);
28static int smb_acl_set_mode(acl_entry_t entry, SMB_ACL_PERM_T perm);
29static acl_t smb_acl_to_posix(const struct smb_acl_t *acl);
30
31
32/* public functions - the api */
33
34SMB_ACL_T posixacl_sys_acl_get_file(vfs_handle_struct *handle,
35 const char *path_p,
36 SMB_ACL_TYPE_T type)
37{
38 struct smb_acl_t *result;
39 acl_type_t acl_type;
40 acl_t acl;
41
42 switch(type) {
43 case SMB_ACL_TYPE_ACCESS:
44 acl_type = ACL_TYPE_ACCESS;
45 break;
46 case SMB_ACL_TYPE_DEFAULT:
47 acl_type = ACL_TYPE_DEFAULT;
48 break;
49 default:
50 errno = EINVAL;
51 return NULL;
52 }
53
54 acl = acl_get_file(path_p, acl_type);
55
56 if (acl == NULL) {
57 return NULL;
58 }
59
60 result = smb_acl_to_internal(acl);
61 acl_free(acl);
62 return result;
63}
64
65SMB_ACL_T posixacl_sys_acl_get_fd(vfs_handle_struct *handle,
66 files_struct *fsp)
67{
68 struct smb_acl_t *result;
69 acl_t acl = acl_get_fd(fsp->fh->fd);
70
71 if (acl == NULL) {
72 return NULL;
73 }
74
75 result = smb_acl_to_internal(acl);
76 acl_free(acl);
77 return result;
78}
79
80int posixacl_sys_acl_set_file(vfs_handle_struct *handle,
81 const char *name,
82 SMB_ACL_TYPE_T type,
83 SMB_ACL_T theacl)
84{
85 int res;
86 acl_type_t acl_type;
87 acl_t acl;
88
89 DEBUG(10, ("Calling acl_set_file: %s, %d\n", name, type));
90
91 switch(type) {
92 case SMB_ACL_TYPE_ACCESS:
93 acl_type = ACL_TYPE_ACCESS;
94 break;
95 case SMB_ACL_TYPE_DEFAULT:
96 acl_type = ACL_TYPE_DEFAULT;
97 break;
98 default:
99 errno = EINVAL;
100 return -1;
101 }
102
103 if ((acl = smb_acl_to_posix(theacl)) == NULL) {
104 return -1;
105 }
106 res = acl_set_file(name, acl_type, acl);
107 if (res != 0) {
108 DEBUG(10, ("acl_set_file failed: %s\n", strerror(errno)));
109 }
110 acl_free(acl);
111 return res;
112}
113
114int posixacl_sys_acl_set_fd(vfs_handle_struct *handle,
115 files_struct *fsp,
116 SMB_ACL_T theacl)
117{
118 int res;
119 acl_t acl = smb_acl_to_posix(theacl);
120 if (acl == NULL) {
121 return -1;
122 }
123 res = acl_set_fd(fsp->fh->fd, acl);
124 acl_free(acl);
125 return res;
126}
127
128int posixacl_sys_acl_delete_def_file(vfs_handle_struct *handle,
129 const char *path)
130{
131 return acl_delete_def_file(path);
132}
133
134
135/* private functions */
136
137static bool smb_ace_to_internal(acl_entry_t posix_ace,
138 struct smb_acl_entry *ace)
139{
140 acl_tag_t tag;
141 acl_permset_t permset;
142
143 if (acl_get_tag_type(posix_ace, &tag) != 0) {
144 DEBUG(0, ("smb_acl_get_tag_type failed\n"));
145 return False;
146 }
147
148 switch(tag) {
149 case ACL_USER:
150 ace->a_type = SMB_ACL_USER;
151 break;
152 case ACL_USER_OBJ:
153 ace->a_type = SMB_ACL_USER_OBJ;
154 break;
155 case ACL_GROUP:
156 ace->a_type = SMB_ACL_GROUP;
157 break;
158 case ACL_GROUP_OBJ:
159 ace->a_type = SMB_ACL_GROUP_OBJ;
160 break;
161 case ACL_OTHER:
162 ace->a_type = SMB_ACL_OTHER;
163 break;
164 case ACL_MASK:
165 ace->a_type = SMB_ACL_MASK;
166 break;
167 default:
168 DEBUG(0, ("unknown tag type %d\n", (unsigned int)tag));
169 return False;
170 }
171 switch(ace->a_type) {
172 case SMB_ACL_USER: {
173 uid_t *puid = (uid_t *)acl_get_qualifier(posix_ace);
174 if (puid == NULL) {
175 DEBUG(0, ("smb_acl_get_qualifier failed\n"));
176 return False;
177 }
178 ace->uid = *puid;
179 acl_free(puid);
180 break;
181 }
182
183 case SMB_ACL_GROUP: {
184 gid_t *pgid = (uid_t *)acl_get_qualifier(posix_ace);
185 if (pgid == NULL) {
186 DEBUG(0, ("smb_acl_get_qualifier failed\n"));
187 return False;
188 }
189 ace->gid = *pgid;
190 acl_free(pgid);
191 break;
192 }
193 default:
194 break;
195 }
196 if (acl_get_permset(posix_ace, &permset) != 0) {
197 DEBUG(0, ("smb_acl_get_mode failed\n"));
198 return False;
199 }
200 ace->a_perm = 0;
201#ifdef HAVE_ACL_GET_PERM_NP
202 ace->a_perm |= (acl_get_perm_np(permset, ACL_READ) ? SMB_ACL_READ : 0);
203 ace->a_perm |= (acl_get_perm_np(permset, ACL_WRITE) ? SMB_ACL_WRITE : 0);
204 ace->a_perm |= (acl_get_perm_np(permset, ACL_EXECUTE) ? SMB_ACL_EXECUTE : 0);
205#else
206 ace->a_perm |= (acl_get_perm(permset, ACL_READ) ? SMB_ACL_READ : 0);
207 ace->a_perm |= (acl_get_perm(permset, ACL_WRITE) ? SMB_ACL_WRITE : 0);
208 ace->a_perm |= (acl_get_perm(permset, ACL_EXECUTE) ? SMB_ACL_EXECUTE : 0);
209#endif
210 return True;
211}
212
213static struct smb_acl_t *smb_acl_to_internal(acl_t acl)
214{
215 struct smb_acl_t *result = SMB_MALLOC_P(struct smb_acl_t);
216 int entry_id = ACL_FIRST_ENTRY;
217 acl_entry_t e;
218 if (result == NULL) {
219 return NULL;
220 }
221 ZERO_STRUCTP(result);
222 while (acl_get_entry(acl, entry_id, &e) == 1) {
223
224 entry_id = ACL_NEXT_ENTRY;
225
226 result = (struct smb_acl_t *)SMB_REALLOC(
227 result, sizeof(struct smb_acl_t) +
228 (sizeof(struct smb_acl_entry) * (result->count+1)));
229 if (result == NULL) {
230 DEBUG(0, ("SMB_REALLOC failed\n"));
231 errno = ENOMEM;
232 return NULL;
233 }
234
235 if (!smb_ace_to_internal(e, &result->acl[result->count])) {
236 SAFE_FREE(result);
237 return NULL;
238 }
239
240 result->count += 1;
241 }
242 return result;
243}
244
245static int smb_acl_set_mode(acl_entry_t entry, SMB_ACL_PERM_T perm)
246{
247 int ret;
248 acl_permset_t permset;
249
250 if ((ret = acl_get_permset(entry, &permset)) != 0) {
251 return ret;
252 }
253 if ((ret = acl_clear_perms(permset)) != 0) {
254 return ret;
255 }
256 if ((perm & SMB_ACL_READ) &&
257 ((ret = acl_add_perm(permset, ACL_READ)) != 0)) {
258 return ret;
259 }
260 if ((perm & SMB_ACL_WRITE) &&
261 ((ret = acl_add_perm(permset, ACL_WRITE)) != 0)) {
262 return ret;
263 }
264 if ((perm & SMB_ACL_EXECUTE) &&
265 ((ret = acl_add_perm(permset, ACL_EXECUTE)) != 0)) {
266 return ret;
267 }
268 return acl_set_permset(entry, permset);
269}
270
271static acl_t smb_acl_to_posix(const struct smb_acl_t *acl)
272{
273 acl_t result;
274 int i;
275
276 result = acl_init(acl->count);
277 if (result == NULL) {
278 DEBUG(10, ("acl_init failed\n"));
279 return NULL;
280 }
281
282 for (i=0; i<acl->count; i++) {
283 const struct smb_acl_entry *entry = &acl->acl[i];
284 acl_entry_t e;
285 acl_tag_t tag;
286
287 if (acl_create_entry(&result, &e) != 0) {
288 DEBUG(1, ("acl_create_entry failed: %s\n",
289 strerror(errno)));
290 goto fail;
291 }
292
293 switch (entry->a_type) {
294 case SMB_ACL_USER:
295 tag = ACL_USER;
296 break;
297 case SMB_ACL_USER_OBJ:
298 tag = ACL_USER_OBJ;
299 break;
300 case SMB_ACL_GROUP:
301 tag = ACL_GROUP;
302 break;
303 case SMB_ACL_GROUP_OBJ:
304 tag = ACL_GROUP_OBJ;
305 break;
306 case SMB_ACL_OTHER:
307 tag = ACL_OTHER;
308 break;
309 case SMB_ACL_MASK:
310 tag = ACL_MASK;
311 break;
312 default:
313 DEBUG(1, ("Unknown tag value %d\n", entry->a_type));
314 goto fail;
315 }
316
317 if (acl_set_tag_type(e, tag) != 0) {
318 DEBUG(10, ("acl_set_tag_type(%d) failed: %s\n",
319 tag, strerror(errno)));
320 goto fail;
321 }
322
323 switch (entry->a_type) {
324 case SMB_ACL_USER:
325 if (acl_set_qualifier(e, &entry->uid) != 0) {
326 DEBUG(1, ("acl_set_qualifiier failed: %s\n",
327 strerror(errno)));
328 goto fail;
329 }
330 break;
331 case SMB_ACL_GROUP:
332 if (acl_set_qualifier(e, &entry->gid) != 0) {
333 DEBUG(1, ("acl_set_qualifiier failed: %s\n",
334 strerror(errno)));
335 goto fail;
336 }
337 break;
338 default: /* Shut up, compiler! :-) */
339 break;
340 }
341
342 if (smb_acl_set_mode(e, entry->a_perm) != 0) {
343 goto fail;
344 }
345 }
346
347 if (acl_valid(result) != 0) {
348 DEBUG(0, ("smb_acl_to_posix: ACL is invalid for set (%s)\n",
349 strerror(errno)));
350 goto fail;
351 }
352
353 return result;
354
355 fail:
356 if (result != NULL) {
357 acl_free(result);
358 }
359 return NULL;
360}
361
362/* VFS operations structure */
363
364static vfs_op_tuple posixacl_op_tuples[] = {
365 /* Disk operations */
366 {SMB_VFS_OP(posixacl_sys_acl_get_file),
367 SMB_VFS_OP_SYS_ACL_GET_FILE,
368 SMB_VFS_LAYER_TRANSPARENT},
369
370 {SMB_VFS_OP(posixacl_sys_acl_get_fd),
371 SMB_VFS_OP_SYS_ACL_GET_FD,
372 SMB_VFS_LAYER_TRANSPARENT},
373
374 {SMB_VFS_OP(posixacl_sys_acl_set_file),
375 SMB_VFS_OP_SYS_ACL_SET_FILE,
376 SMB_VFS_LAYER_TRANSPARENT},
377
378 {SMB_VFS_OP(posixacl_sys_acl_set_fd),
379 SMB_VFS_OP_SYS_ACL_SET_FD,
380 SMB_VFS_LAYER_TRANSPARENT},
381
382 {SMB_VFS_OP(posixacl_sys_acl_delete_def_file),
383 SMB_VFS_OP_SYS_ACL_DELETE_DEF_FILE,
384 SMB_VFS_LAYER_TRANSPARENT},
385
386 {SMB_VFS_OP(NULL),
387 SMB_VFS_OP_NOOP,
388 SMB_VFS_LAYER_NOOP}
389};
390
391NTSTATUS vfs_posixacl_init(void);
392NTSTATUS vfs_posixacl_init(void)
393{
394 return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "posixacl",
395 posixacl_op_tuples);
396}
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