source: vendor/3.6.9/source3/modules/vfs_posixacl.c

Last change on this file was 740, checked in by Silvan Scherrer, 13 years ago

Samba Server: update vendor to 3.6.0
File size: 8.7 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#include "system/filesys.h"
22#include "smbd/smbd.h"
23#include "modules/vfs_posixacl.h"
24
25/* prototypes for static functions first - for clarity */
26
27static bool smb_ace_to_internal(acl_entry_t posix_ace,
28 struct smb_acl_entry *ace);
29static struct smb_acl_t *smb_acl_to_internal(acl_t acl);
30static int smb_acl_set_mode(acl_entry_t entry, SMB_ACL_PERM_T perm);
31static acl_t smb_acl_to_posix(const struct smb_acl_t *acl);
32
33
34/* public functions - the api */
35
36SMB_ACL_T posixacl_sys_acl_get_file(vfs_handle_struct *handle,
37 const char *path_p,
38 SMB_ACL_TYPE_T type)
39{
40 struct smb_acl_t *result;
41 acl_type_t acl_type;
42 acl_t acl;
43
44 switch(type) {
45 case SMB_ACL_TYPE_ACCESS:
46 acl_type = ACL_TYPE_ACCESS;
47 break;
48 case SMB_ACL_TYPE_DEFAULT:
49 acl_type = ACL_TYPE_DEFAULT;
50 break;
51 default:
52 errno = EINVAL;
53 return NULL;
54 }
55
56 acl = acl_get_file(path_p, acl_type);
57
58 if (acl == NULL) {
59 return NULL;
60 }
61
62 result = smb_acl_to_internal(acl);
63 acl_free(acl);
64 return result;
65}
66
67SMB_ACL_T posixacl_sys_acl_get_fd(vfs_handle_struct *handle,
68 files_struct *fsp)
69{
70 struct smb_acl_t *result;
71 acl_t acl = acl_get_fd(fsp->fh->fd);
72
73 if (acl == NULL) {
74 return NULL;
75 }
76
77 result = smb_acl_to_internal(acl);
78 acl_free(acl);
79 return result;
80}
81
82int posixacl_sys_acl_set_file(vfs_handle_struct *handle,
83 const char *name,
84 SMB_ACL_TYPE_T type,
85 SMB_ACL_T theacl)
86{
87 int res;
88 acl_type_t acl_type;
89 acl_t acl;
90
91 DEBUG(10, ("Calling acl_set_file: %s, %d\n", name, type));
92
93 switch(type) {
94 case SMB_ACL_TYPE_ACCESS:
95 acl_type = ACL_TYPE_ACCESS;
96 break;
97 case SMB_ACL_TYPE_DEFAULT:
98 acl_type = ACL_TYPE_DEFAULT;
99 break;
100 default:
101 errno = EINVAL;
102 return -1;
103 }
104
105 if ((acl = smb_acl_to_posix(theacl)) == NULL) {
106 return -1;
107 }
108 res = acl_set_file(name, acl_type, acl);
109 if (res != 0) {
110 DEBUG(10, ("acl_set_file failed: %s\n", strerror(errno)));
111 }
112 acl_free(acl);
113 return res;
114}
115
116int posixacl_sys_acl_set_fd(vfs_handle_struct *handle,
117 files_struct *fsp,
118 SMB_ACL_T theacl)
119{
120 int res;
121 acl_t acl = smb_acl_to_posix(theacl);
122 if (acl == NULL) {
123 return -1;
124 }
125 res = acl_set_fd(fsp->fh->fd, acl);
126 acl_free(acl);
127 return res;
128}
129
130int posixacl_sys_acl_delete_def_file(vfs_handle_struct *handle,
131 const char *path)
132{
133 return acl_delete_def_file(path);
134}
135
136
137/* private functions */
138
139static bool smb_ace_to_internal(acl_entry_t posix_ace,
140 struct smb_acl_entry *ace)
141{
142 acl_tag_t tag;
143 acl_permset_t permset;
144
145 if (acl_get_tag_type(posix_ace, &tag) != 0) {
146 DEBUG(0, ("smb_acl_get_tag_type failed\n"));
147 return False;
148 }
149
150 switch(tag) {
151 case ACL_USER:
152 ace->a_type = SMB_ACL_USER;
153 break;
154 case ACL_USER_OBJ:
155 ace->a_type = SMB_ACL_USER_OBJ;
156 break;
157 case ACL_GROUP:
158 ace->a_type = SMB_ACL_GROUP;
159 break;
160 case ACL_GROUP_OBJ:
161 ace->a_type = SMB_ACL_GROUP_OBJ;
162 break;
163 case ACL_OTHER:
164 ace->a_type = SMB_ACL_OTHER;
165 break;
166 case ACL_MASK:
167 ace->a_type = SMB_ACL_MASK;
168 break;
169 default:
170 DEBUG(0, ("unknown tag type %d\n", (unsigned int)tag));
171 return False;
172 }
173 switch(ace->a_type) {
174 case SMB_ACL_USER: {
175 uid_t *puid = (uid_t *)acl_get_qualifier(posix_ace);
176 if (puid == NULL) {
177 DEBUG(0, ("smb_acl_get_qualifier failed\n"));
178 return False;
179 }
180 ace->uid = *puid;
181 acl_free(puid);
182 break;
183 }
184
185 case SMB_ACL_GROUP: {
186 gid_t *pgid = (uid_t *)acl_get_qualifier(posix_ace);
187 if (pgid == NULL) {
188 DEBUG(0, ("smb_acl_get_qualifier failed\n"));
189 return False;
190 }
191 ace->gid = *pgid;
192 acl_free(pgid);
193 break;
194 }
195 default:
196 break;
197 }
198 if (acl_get_permset(posix_ace, &permset) != 0) {
199 DEBUG(0, ("smb_acl_get_mode failed\n"));
200 return False;
201 }
202 ace->a_perm = 0;
203#ifdef HAVE_ACL_GET_PERM_NP
204 ace->a_perm |= (acl_get_perm_np(permset, ACL_READ) ? SMB_ACL_READ : 0);
205 ace->a_perm |= (acl_get_perm_np(permset, ACL_WRITE) ? SMB_ACL_WRITE : 0);
206 ace->a_perm |= (acl_get_perm_np(permset, ACL_EXECUTE) ? SMB_ACL_EXECUTE : 0);
207#else
208 ace->a_perm |= (acl_get_perm(permset, ACL_READ) ? SMB_ACL_READ : 0);
209 ace->a_perm |= (acl_get_perm(permset, ACL_WRITE) ? SMB_ACL_WRITE : 0);
210 ace->a_perm |= (acl_get_perm(permset, ACL_EXECUTE) ? SMB_ACL_EXECUTE : 0);
211#endif
212 return True;
213}
214
215static struct smb_acl_t *smb_acl_to_internal(acl_t acl)
216{
217 struct smb_acl_t *result = SMB_MALLOC_P(struct smb_acl_t);
218 int entry_id = ACL_FIRST_ENTRY;
219 acl_entry_t e;
220 if (result == NULL) {
221 return NULL;
222 }
223 ZERO_STRUCTP(result);
224 while (acl_get_entry(acl, entry_id, &e) == 1) {
225
226 entry_id = ACL_NEXT_ENTRY;
227
228 result = (struct smb_acl_t *)SMB_REALLOC(
229 result, sizeof(struct smb_acl_t) +
230 (sizeof(struct smb_acl_entry) * (result->count+1)));
231 if (result == NULL) {
232 DEBUG(0, ("SMB_REALLOC failed\n"));
233 errno = ENOMEM;
234 return NULL;
235 }
236
237 if (!smb_ace_to_internal(e, &result->acl[result->count])) {
238 SAFE_FREE(result);
239 return NULL;
240 }
241
242 result->count += 1;
243 }
244 return result;
245}
246
247static int smb_acl_set_mode(acl_entry_t entry, SMB_ACL_PERM_T perm)
248{
249 int ret;
250 acl_permset_t permset;
251
252 if ((ret = acl_get_permset(entry, &permset)) != 0) {
253 return ret;
254 }
255 if ((ret = acl_clear_perms(permset)) != 0) {
256 return ret;
257 }
258 if ((perm & SMB_ACL_READ) &&
259 ((ret = acl_add_perm(permset, ACL_READ)) != 0)) {
260 return ret;
261 }
262 if ((perm & SMB_ACL_WRITE) &&
263 ((ret = acl_add_perm(permset, ACL_WRITE)) != 0)) {
264 return ret;
265 }
266 if ((perm & SMB_ACL_EXECUTE) &&
267 ((ret = acl_add_perm(permset, ACL_EXECUTE)) != 0)) {
268 return ret;
269 }
270 return acl_set_permset(entry, permset);
271}
272
273static acl_t smb_acl_to_posix(const struct smb_acl_t *acl)
274{
275 acl_t result;
276 int i;
277
278 result = acl_init(acl->count);
279 if (result == NULL) {
280 DEBUG(10, ("acl_init failed\n"));
281 return NULL;
282 }
283
284 for (i=0; i<acl->count; i++) {
285 const struct smb_acl_entry *entry = &acl->acl[i];
286 acl_entry_t e;
287 acl_tag_t tag;
288
289 if (acl_create_entry(&result, &e) != 0) {
290 DEBUG(1, ("acl_create_entry failed: %s\n",
291 strerror(errno)));
292 goto fail;
293 }
294
295 switch (entry->a_type) {
296 case SMB_ACL_USER:
297 tag = ACL_USER;
298 break;
299 case SMB_ACL_USER_OBJ:
300 tag = ACL_USER_OBJ;
301 break;
302 case SMB_ACL_GROUP:
303 tag = ACL_GROUP;
304 break;
305 case SMB_ACL_GROUP_OBJ:
306 tag = ACL_GROUP_OBJ;
307 break;
308 case SMB_ACL_OTHER:
309 tag = ACL_OTHER;
310 break;
311 case SMB_ACL_MASK:
312 tag = ACL_MASK;
313 break;
314 default:
315 DEBUG(1, ("Unknown tag value %d\n", entry->a_type));
316 goto fail;
317 }
318
319 if (acl_set_tag_type(e, tag) != 0) {
320 DEBUG(10, ("acl_set_tag_type(%d) failed: %s\n",
321 tag, strerror(errno)));
322 goto fail;
323 }
324
325 switch (entry->a_type) {
326 case SMB_ACL_USER:
327 if (acl_set_qualifier(e, &entry->uid) != 0) {
328 DEBUG(1, ("acl_set_qualifiier failed: %s\n",
329 strerror(errno)));
330 goto fail;
331 }
332 break;
333 case SMB_ACL_GROUP:
334 if (acl_set_qualifier(e, &entry->gid) != 0) {
335 DEBUG(1, ("acl_set_qualifiier failed: %s\n",
336 strerror(errno)));
337 goto fail;
338 }
339 break;
340 default: /* Shut up, compiler! :-) */
341 break;
342 }
343
344 if (smb_acl_set_mode(e, entry->a_perm) != 0) {
345 goto fail;
346 }
347 }
348
349 if (acl_valid(result) != 0) {
350 DEBUG(0, ("smb_acl_to_posix: ACL is invalid for set (%s)\n",
351 strerror(errno)));
352 goto fail;
353 }
354
355 return result;
356
357 fail:
358 if (result != NULL) {
359 acl_free(result);
360 }
361 return NULL;
362}
363
364/* VFS operations structure */
365
366static struct vfs_fn_pointers posixacl_fns = {
367 .sys_acl_get_file = posixacl_sys_acl_get_file,
368 .sys_acl_get_fd = posixacl_sys_acl_get_fd,
369 .sys_acl_set_file = posixacl_sys_acl_set_file,
370 .sys_acl_set_fd = posixacl_sys_acl_set_fd,
371 .sys_acl_delete_def_file = posixacl_sys_acl_delete_def_file,
372};
373
374NTSTATUS vfs_posixacl_init(void);
375NTSTATUS vfs_posixacl_init(void)
376{
377 return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "posixacl",
378 &posixacl_fns);
379}
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