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Commit | Line | Data |
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16f7e0fe | 1 | #include <linux/capability.h> |
1da177e4 LT |
2 | #include <linux/fs.h> |
3 | #include <linux/posix_acl.h> | |
4 | #include <linux/reiserfs_fs.h> | |
5 | #include <linux/errno.h> | |
6 | #include <linux/pagemap.h> | |
7 | #include <linux/xattr.h> | |
9a59f452 | 8 | #include <linux/posix_acl_xattr.h> |
1da177e4 LT |
9 | #include <linux/reiserfs_xattr.h> |
10 | #include <linux/reiserfs_acl.h> | |
11 | #include <asm/uaccess.h> | |
12 | ||
0ab2621e JM |
13 | static int reiserfs_set_acl(struct reiserfs_transaction_handle *th, |
14 | struct inode *inode, int type, | |
bd4c625c | 15 | struct posix_acl *acl); |
1da177e4 LT |
16 | |
17 | static int | |
18 | xattr_set_acl(struct inode *inode, int type, const void *value, size_t size) | |
19 | { | |
20 | struct posix_acl *acl; | |
0ab2621e JM |
21 | int error, error2; |
22 | struct reiserfs_transaction_handle th; | |
23 | size_t jcreate_blocks; | |
1da177e4 LT |
24 | if (!reiserfs_posixacl(inode->i_sb)) |
25 | return -EOPNOTSUPP; | |
3bd858ab | 26 | if (!is_owner_or_cap(inode)) |
1da177e4 LT |
27 | return -EPERM; |
28 | ||
29 | if (value) { | |
30 | acl = posix_acl_from_xattr(value, size); | |
31 | if (IS_ERR(acl)) { | |
32 | return PTR_ERR(acl); | |
33 | } else if (acl) { | |
34 | error = posix_acl_valid(acl); | |
35 | if (error) | |
36 | goto release_and_out; | |
37 | } | |
38 | } else | |
39 | acl = NULL; | |
40 | ||
0ab2621e JM |
41 | /* Pessimism: We can't assume that anything from the xattr root up |
42 | * has been created. */ | |
43 | ||
44 | jcreate_blocks = reiserfs_xattr_jcreate_nblocks(inode) + | |
45 | reiserfs_xattr_nblocks(inode, size) * 2; | |
46 | ||
47 | reiserfs_write_lock(inode->i_sb); | |
48 | error = journal_begin(&th, inode->i_sb, jcreate_blocks); | |
49 | if (error == 0) { | |
50 | error = reiserfs_set_acl(&th, inode, type, acl); | |
51 | error2 = journal_end(&th, inode->i_sb, jcreate_blocks); | |
52 | if (error2) | |
53 | error = error2; | |
54 | } | |
55 | reiserfs_write_unlock(inode->i_sb); | |
1da177e4 | 56 | |
bd4c625c | 57 | release_and_out: |
1da177e4 LT |
58 | posix_acl_release(acl); |
59 | return error; | |
60 | } | |
61 | ||
1da177e4 LT |
62 | static int |
63 | xattr_get_acl(struct inode *inode, int type, void *buffer, size_t size) | |
64 | { | |
65 | struct posix_acl *acl; | |
66 | int error; | |
67 | ||
68 | if (!reiserfs_posixacl(inode->i_sb)) | |
69 | return -EOPNOTSUPP; | |
70 | ||
bd4c625c | 71 | acl = reiserfs_get_acl(inode, type); |
1da177e4 LT |
72 | if (IS_ERR(acl)) |
73 | return PTR_ERR(acl); | |
74 | if (acl == NULL) | |
75 | return -ENODATA; | |
76 | error = posix_acl_to_xattr(acl, buffer, size); | |
77 | posix_acl_release(acl); | |
78 | ||
79 | return error; | |
80 | } | |
81 | ||
1da177e4 LT |
82 | /* |
83 | * Convert from filesystem to in-memory representation. | |
84 | */ | |
bd4c625c | 85 | static struct posix_acl *posix_acl_from_disk(const void *value, size_t size) |
1da177e4 LT |
86 | { |
87 | const char *end = (char *)value + size; | |
88 | int n, count; | |
89 | struct posix_acl *acl; | |
90 | ||
91 | if (!value) | |
92 | return NULL; | |
93 | if (size < sizeof(reiserfs_acl_header)) | |
bd4c625c LT |
94 | return ERR_PTR(-EINVAL); |
95 | if (((reiserfs_acl_header *) value)->a_version != | |
1da177e4 LT |
96 | cpu_to_le32(REISERFS_ACL_VERSION)) |
97 | return ERR_PTR(-EINVAL); | |
98 | value = (char *)value + sizeof(reiserfs_acl_header); | |
99 | count = reiserfs_acl_count(size); | |
100 | if (count < 0) | |
101 | return ERR_PTR(-EINVAL); | |
102 | if (count == 0) | |
103 | return NULL; | |
104 | acl = posix_acl_alloc(count, GFP_NOFS); | |
105 | if (!acl) | |
106 | return ERR_PTR(-ENOMEM); | |
bd4c625c LT |
107 | for (n = 0; n < count; n++) { |
108 | reiserfs_acl_entry *entry = (reiserfs_acl_entry *) value; | |
1da177e4 LT |
109 | if ((char *)value + sizeof(reiserfs_acl_entry_short) > end) |
110 | goto fail; | |
bd4c625c | 111 | acl->a_entries[n].e_tag = le16_to_cpu(entry->e_tag); |
1da177e4 | 112 | acl->a_entries[n].e_perm = le16_to_cpu(entry->e_perm); |
bd4c625c LT |
113 | switch (acl->a_entries[n].e_tag) { |
114 | case ACL_USER_OBJ: | |
115 | case ACL_GROUP_OBJ: | |
116 | case ACL_MASK: | |
117 | case ACL_OTHER: | |
118 | value = (char *)value + | |
119 | sizeof(reiserfs_acl_entry_short); | |
120 | acl->a_entries[n].e_id = ACL_UNDEFINED_ID; | |
121 | break; | |
122 | ||
123 | case ACL_USER: | |
124 | case ACL_GROUP: | |
125 | value = (char *)value + sizeof(reiserfs_acl_entry); | |
126 | if ((char *)value > end) | |
1da177e4 | 127 | goto fail; |
bd4c625c LT |
128 | acl->a_entries[n].e_id = le32_to_cpu(entry->e_id); |
129 | break; | |
130 | ||
131 | default: | |
132 | goto fail; | |
1da177e4 LT |
133 | } |
134 | } | |
135 | if (value != end) | |
136 | goto fail; | |
137 | return acl; | |
138 | ||
bd4c625c | 139 | fail: |
1da177e4 LT |
140 | posix_acl_release(acl); |
141 | return ERR_PTR(-EINVAL); | |
142 | } | |
143 | ||
144 | /* | |
145 | * Convert from in-memory to filesystem representation. | |
146 | */ | |
bd4c625c | 147 | static void *posix_acl_to_disk(const struct posix_acl *acl, size_t * size) |
1da177e4 LT |
148 | { |
149 | reiserfs_acl_header *ext_acl; | |
150 | char *e; | |
151 | int n; | |
152 | ||
153 | *size = reiserfs_acl_size(acl->a_count); | |
5cbded58 | 154 | ext_acl = kmalloc(sizeof(reiserfs_acl_header) + |
bd4c625c LT |
155 | acl->a_count * |
156 | sizeof(reiserfs_acl_entry), | |
157 | GFP_NOFS); | |
1da177e4 LT |
158 | if (!ext_acl) |
159 | return ERR_PTR(-ENOMEM); | |
160 | ext_acl->a_version = cpu_to_le32(REISERFS_ACL_VERSION); | |
161 | e = (char *)ext_acl + sizeof(reiserfs_acl_header); | |
bd4c625c LT |
162 | for (n = 0; n < acl->a_count; n++) { |
163 | reiserfs_acl_entry *entry = (reiserfs_acl_entry *) e; | |
164 | entry->e_tag = cpu_to_le16(acl->a_entries[n].e_tag); | |
1da177e4 | 165 | entry->e_perm = cpu_to_le16(acl->a_entries[n].e_perm); |
bd4c625c LT |
166 | switch (acl->a_entries[n].e_tag) { |
167 | case ACL_USER: | |
168 | case ACL_GROUP: | |
169 | entry->e_id = cpu_to_le32(acl->a_entries[n].e_id); | |
170 | e += sizeof(reiserfs_acl_entry); | |
171 | break; | |
172 | ||
173 | case ACL_USER_OBJ: | |
174 | case ACL_GROUP_OBJ: | |
175 | case ACL_MASK: | |
176 | case ACL_OTHER: | |
177 | e += sizeof(reiserfs_acl_entry_short); | |
178 | break; | |
179 | ||
180 | default: | |
181 | goto fail; | |
1da177e4 LT |
182 | } |
183 | } | |
184 | return (char *)ext_acl; | |
185 | ||
bd4c625c | 186 | fail: |
1da177e4 LT |
187 | kfree(ext_acl); |
188 | return ERR_PTR(-EINVAL); | |
189 | } | |
190 | ||
d984561b JM |
191 | static inline void iset_acl(struct inode *inode, struct posix_acl **i_acl, |
192 | struct posix_acl *acl) | |
193 | { | |
194 | spin_lock(&inode->i_lock); | |
7a77b15d | 195 | if (*i_acl != ACL_NOT_CACHED) |
d984561b | 196 | posix_acl_release(*i_acl); |
7a77b15d | 197 | *i_acl = posix_acl_dup(acl); |
d984561b JM |
198 | spin_unlock(&inode->i_lock); |
199 | } | |
200 | ||
201 | static inline struct posix_acl *iget_acl(struct inode *inode, | |
202 | struct posix_acl **i_acl) | |
203 | { | |
7a77b15d | 204 | struct posix_acl *acl = ACL_NOT_CACHED; |
d984561b JM |
205 | |
206 | spin_lock(&inode->i_lock); | |
7a77b15d | 207 | if (*i_acl != ACL_NOT_CACHED) |
d984561b JM |
208 | acl = posix_acl_dup(*i_acl); |
209 | spin_unlock(&inode->i_lock); | |
210 | ||
211 | return acl; | |
212 | } | |
213 | ||
1da177e4 LT |
214 | /* |
215 | * Inode operation get_posix_acl(). | |
216 | * | |
1b1dcc1b | 217 | * inode->i_mutex: down |
1da177e4 LT |
218 | * BKL held [before 2.5.x] |
219 | */ | |
bd4c625c | 220 | struct posix_acl *reiserfs_get_acl(struct inode *inode, int type) |
1da177e4 LT |
221 | { |
222 | char *name, *value; | |
223 | struct posix_acl *acl, **p_acl; | |
3cdc409c | 224 | int size; |
1da177e4 | 225 | int retval; |
bd4c625c LT |
226 | |
227 | switch (type) { | |
228 | case ACL_TYPE_ACCESS: | |
229 | name = POSIX_ACL_XATTR_ACCESS; | |
281eede0 | 230 | p_acl = &inode->i_acl; |
bd4c625c LT |
231 | break; |
232 | case ACL_TYPE_DEFAULT: | |
233 | name = POSIX_ACL_XATTR_DEFAULT; | |
281eede0 | 234 | p_acl = &inode->i_default_acl; |
bd4c625c LT |
235 | break; |
236 | default: | |
237 | return ERR_PTR(-EINVAL); | |
238 | } | |
239 | ||
d984561b | 240 | acl = iget_acl(inode, p_acl); |
7a77b15d | 241 | if (acl != ACL_NOT_CACHED) |
d984561b | 242 | return acl; |
bd4c625c LT |
243 | |
244 | size = reiserfs_xattr_get(inode, name, NULL, 0); | |
3cdc409c | 245 | if (size < 0) { |
bd4c625c | 246 | if (size == -ENODATA || size == -ENOSYS) { |
7a77b15d | 247 | *p_acl = NULL; |
bd4c625c LT |
248 | return NULL; |
249 | } | |
250 | return ERR_PTR(size); | |
251 | } | |
1da177e4 | 252 | |
bd4c625c LT |
253 | value = kmalloc(size, GFP_NOFS); |
254 | if (!value) | |
255 | return ERR_PTR(-ENOMEM); | |
1da177e4 LT |
256 | |
257 | retval = reiserfs_xattr_get(inode, name, value, size); | |
258 | if (retval == -ENODATA || retval == -ENOSYS) { | |
259 | /* This shouldn't actually happen as it should have | |
260 | been caught above.. but just in case */ | |
261 | acl = NULL; | |
7a77b15d | 262 | *p_acl = acl; |
bd4c625c | 263 | } else if (retval < 0) { |
1da177e4 LT |
264 | acl = ERR_PTR(retval); |
265 | } else { | |
266 | acl = posix_acl_from_disk(value, retval); | |
90947ef2 | 267 | if (!IS_ERR(acl)) |
d984561b | 268 | iset_acl(inode, p_acl, acl); |
bd4c625c | 269 | } |
1da177e4 LT |
270 | |
271 | kfree(value); | |
272 | return acl; | |
273 | } | |
274 | ||
275 | /* | |
276 | * Inode operation set_posix_acl(). | |
277 | * | |
1b1dcc1b | 278 | * inode->i_mutex: down |
1da177e4 LT |
279 | * BKL held [before 2.5.x] |
280 | */ | |
281 | static int | |
0ab2621e JM |
282 | reiserfs_set_acl(struct reiserfs_transaction_handle *th, struct inode *inode, |
283 | int type, struct posix_acl *acl) | |
1da177e4 | 284 | { |
bd4c625c | 285 | char *name; |
1da177e4 LT |
286 | void *value = NULL; |
287 | struct posix_acl **p_acl; | |
48b32a35 | 288 | size_t size = 0; |
1da177e4 | 289 | int error; |
1da177e4 LT |
290 | |
291 | if (S_ISLNK(inode->i_mode)) | |
292 | return -EOPNOTSUPP; | |
293 | ||
bd4c625c LT |
294 | switch (type) { |
295 | case ACL_TYPE_ACCESS: | |
296 | name = POSIX_ACL_XATTR_ACCESS; | |
281eede0 | 297 | p_acl = &inode->i_acl; |
bd4c625c LT |
298 | if (acl) { |
299 | mode_t mode = inode->i_mode; | |
300 | error = posix_acl_equiv_mode(acl, &mode); | |
301 | if (error < 0) | |
302 | return error; | |
303 | else { | |
304 | inode->i_mode = mode; | |
305 | if (error == 0) | |
306 | acl = NULL; | |
307 | } | |
308 | } | |
309 | break; | |
310 | case ACL_TYPE_DEFAULT: | |
311 | name = POSIX_ACL_XATTR_DEFAULT; | |
281eede0 | 312 | p_acl = &inode->i_default_acl; |
bd4c625c LT |
313 | if (!S_ISDIR(inode->i_mode)) |
314 | return acl ? -EACCES : 0; | |
315 | break; | |
316 | default: | |
317 | return -EINVAL; | |
318 | } | |
319 | ||
320 | if (acl) { | |
321 | value = posix_acl_to_disk(acl, &size); | |
322 | if (IS_ERR(value)) | |
323 | return (int)PTR_ERR(value); | |
48b32a35 JM |
324 | } |
325 | ||
0ab2621e | 326 | error = reiserfs_xattr_set_handle(th, inode, name, value, size, 0); |
48b32a35 JM |
327 | |
328 | /* | |
329 | * Ensure that the inode gets dirtied if we're only using | |
330 | * the mode bits and an old ACL didn't exist. We don't need | |
331 | * to check if the inode is hashed here since we won't get | |
332 | * called by reiserfs_inherit_default_acl(). | |
333 | */ | |
334 | if (error == -ENODATA) { | |
335 | error = 0; | |
336 | if (type == ACL_TYPE_ACCESS) { | |
337 | inode->i_ctime = CURRENT_TIME_SEC; | |
bd4c625c | 338 | mark_inode_dirty(inode); |
bd4c625c LT |
339 | } |
340 | } | |
1da177e4 | 341 | |
833d304b | 342 | kfree(value); |
1da177e4 | 343 | |
d984561b JM |
344 | if (!error) |
345 | iset_acl(inode, p_acl, acl); | |
1da177e4 LT |
346 | |
347 | return error; | |
348 | } | |
349 | ||
1b1dcc1b | 350 | /* dir->i_mutex: locked, |
1da177e4 LT |
351 | * inode is new and not released into the wild yet */ |
352 | int | |
0ab2621e JM |
353 | reiserfs_inherit_default_acl(struct reiserfs_transaction_handle *th, |
354 | struct inode *dir, struct dentry *dentry, | |
bd4c625c | 355 | struct inode *inode) |
1da177e4 | 356 | { |
bd4c625c LT |
357 | struct posix_acl *acl; |
358 | int err = 0; | |
359 | ||
360 | /* ACLs only get applied to files and directories */ | |
361 | if (S_ISLNK(inode->i_mode)) | |
362 | return 0; | |
363 | ||
364 | /* ACLs can only be used on "new" objects, so if it's an old object | |
365 | * there is nothing to inherit from */ | |
366 | if (get_inode_sd_version(dir) == STAT_DATA_V1) | |
367 | goto apply_umask; | |
368 | ||
369 | /* Don't apply ACLs to objects in the .reiserfs_priv tree.. This | |
370 | * would be useless since permissions are ignored, and a pain because | |
371 | * it introduces locking cycles */ | |
6dfede69 JM |
372 | if (IS_PRIVATE(dir)) { |
373 | inode->i_flags |= S_PRIVATE; | |
bd4c625c LT |
374 | goto apply_umask; |
375 | } | |
376 | ||
377 | acl = reiserfs_get_acl(dir, ACL_TYPE_DEFAULT); | |
7a77b15d | 378 | if (IS_ERR(acl)) |
bd4c625c | 379 | return PTR_ERR(acl); |
bd4c625c LT |
380 | |
381 | if (acl) { | |
382 | struct posix_acl *acl_copy; | |
383 | mode_t mode = inode->i_mode; | |
384 | int need_acl; | |
385 | ||
386 | /* Copy the default ACL to the default ACL of a new directory */ | |
387 | if (S_ISDIR(inode->i_mode)) { | |
0ab2621e JM |
388 | err = reiserfs_set_acl(th, inode, ACL_TYPE_DEFAULT, |
389 | acl); | |
bd4c625c LT |
390 | if (err) |
391 | goto cleanup; | |
392 | } | |
393 | ||
394 | /* Now we reconcile the new ACL and the mode, | |
395 | potentially modifying both */ | |
396 | acl_copy = posix_acl_clone(acl, GFP_NOFS); | |
397 | if (!acl_copy) { | |
398 | err = -ENOMEM; | |
399 | goto cleanup; | |
400 | } | |
401 | ||
402 | need_acl = posix_acl_create_masq(acl_copy, &mode); | |
403 | if (need_acl >= 0) { | |
404 | if (mode != inode->i_mode) { | |
405 | inode->i_mode = mode; | |
406 | } | |
407 | ||
408 | /* If we need an ACL.. */ | |
409 | if (need_acl > 0) { | |
0ab2621e JM |
410 | err = reiserfs_set_acl(th, inode, |
411 | ACL_TYPE_ACCESS, | |
412 | acl_copy); | |
bd4c625c LT |
413 | if (err) |
414 | goto cleanup_copy; | |
415 | } | |
416 | } | |
417 | cleanup_copy: | |
418 | posix_acl_release(acl_copy); | |
419 | cleanup: | |
420 | posix_acl_release(acl); | |
421 | } else { | |
422 | apply_umask: | |
423 | /* no ACL, apply umask */ | |
ce3b0f8d | 424 | inode->i_mode &= ~current_umask(); |
bd4c625c LT |
425 | } |
426 | ||
427 | return err; | |
1da177e4 LT |
428 | } |
429 | ||
0ab2621e JM |
430 | /* This is used to cache the default acl before a new object is created. |
431 | * The biggest reason for this is to get an idea of how many blocks will | |
432 | * actually be required for the create operation if we must inherit an ACL. | |
433 | * An ACL write can add up to 3 object creations and an additional file write | |
434 | * so we'd prefer not to reserve that many blocks in the journal if we can. | |
435 | * It also has the advantage of not loading the ACL with a transaction open, | |
436 | * this may seem silly, but if the owner of the directory is doing the | |
437 | * creation, the ACL may not be loaded since the permissions wouldn't require | |
438 | * it. | |
439 | * We return the number of blocks required for the transaction. | |
440 | */ | |
bd4c625c | 441 | int reiserfs_cache_default_acl(struct inode *inode) |
1da177e4 | 442 | { |
0ab2621e JM |
443 | struct posix_acl *acl; |
444 | int nblocks = 0; | |
445 | ||
446 | if (IS_PRIVATE(inode)) | |
447 | return 0; | |
448 | ||
449 | acl = reiserfs_get_acl(inode, ACL_TYPE_DEFAULT); | |
450 | ||
451 | if (acl && !IS_ERR(acl)) { | |
452 | int size = reiserfs_acl_size(acl->a_count); | |
453 | ||
454 | /* Other xattrs can be created during inode creation. We don't | |
455 | * want to claim too many blocks, so we check to see if we | |
456 | * we need to create the tree to the xattrs, and then we | |
457 | * just want two files. */ | |
458 | nblocks = reiserfs_xattr_jcreate_nblocks(inode); | |
459 | nblocks += JOURNAL_BLOCKS_PER_OBJECT(inode->i_sb); | |
460 | ||
461 | REISERFS_I(inode)->i_flags |= i_has_xattr_dir; | |
462 | ||
463 | /* We need to account for writes + bitmaps for two files */ | |
464 | nblocks += reiserfs_xattr_nblocks(inode, size) * 4; | |
465 | posix_acl_release(acl); | |
bd4c625c LT |
466 | } |
467 | ||
0ab2621e | 468 | return nblocks; |
1da177e4 LT |
469 | } |
470 | ||
bd4c625c | 471 | int reiserfs_acl_chmod(struct inode *inode) |
1da177e4 | 472 | { |
bd4c625c LT |
473 | struct posix_acl *acl, *clone; |
474 | int error; | |
1da177e4 | 475 | |
bd4c625c LT |
476 | if (S_ISLNK(inode->i_mode)) |
477 | return -EOPNOTSUPP; | |
1da177e4 | 478 | |
bd4c625c LT |
479 | if (get_inode_sd_version(inode) == STAT_DATA_V1 || |
480 | !reiserfs_posixacl(inode->i_sb)) { | |
481 | return 0; | |
1da177e4 LT |
482 | } |
483 | ||
bd4c625c | 484 | acl = reiserfs_get_acl(inode, ACL_TYPE_ACCESS); |
bd4c625c LT |
485 | if (!acl) |
486 | return 0; | |
487 | if (IS_ERR(acl)) | |
488 | return PTR_ERR(acl); | |
489 | clone = posix_acl_clone(acl, GFP_NOFS); | |
490 | posix_acl_release(acl); | |
491 | if (!clone) | |
492 | return -ENOMEM; | |
493 | error = posix_acl_chmod_masq(clone, inode->i_mode); | |
0ab2621e JM |
494 | if (!error) { |
495 | struct reiserfs_transaction_handle th; | |
496 | size_t size = reiserfs_xattr_nblocks(inode, | |
497 | reiserfs_acl_size(clone->a_count)); | |
498 | reiserfs_write_lock(inode->i_sb); | |
499 | error = journal_begin(&th, inode->i_sb, size * 2); | |
500 | if (!error) { | |
501 | int error2; | |
502 | error = reiserfs_set_acl(&th, inode, ACL_TYPE_ACCESS, | |
503 | clone); | |
504 | error2 = journal_end(&th, inode->i_sb, size * 2); | |
505 | if (error2) | |
506 | error = error2; | |
507 | } | |
508 | reiserfs_write_unlock(inode->i_sb); | |
509 | } | |
bd4c625c LT |
510 | posix_acl_release(clone); |
511 | return error; | |
1da177e4 LT |
512 | } |
513 | ||
514 | static int | |
515 | posix_acl_access_get(struct inode *inode, const char *name, | |
bd4c625c | 516 | void *buffer, size_t size) |
1da177e4 | 517 | { |
bd4c625c | 518 | if (strlen(name) != sizeof(POSIX_ACL_XATTR_ACCESS) - 1) |
1da177e4 LT |
519 | return -EINVAL; |
520 | return xattr_get_acl(inode, ACL_TYPE_ACCESS, buffer, size); | |
521 | } | |
522 | ||
523 | static int | |
524 | posix_acl_access_set(struct inode *inode, const char *name, | |
bd4c625c | 525 | const void *value, size_t size, int flags) |
1da177e4 | 526 | { |
bd4c625c | 527 | if (strlen(name) != sizeof(POSIX_ACL_XATTR_ACCESS) - 1) |
1da177e4 LT |
528 | return -EINVAL; |
529 | return xattr_set_acl(inode, ACL_TYPE_ACCESS, value, size); | |
530 | } | |
531 | ||
48b32a35 JM |
532 | static size_t posix_acl_access_list(struct inode *inode, char *list, |
533 | size_t list_size, const char *name, | |
534 | size_t name_len) | |
1da177e4 | 535 | { |
48b32a35 | 536 | const size_t size = sizeof(POSIX_ACL_XATTR_ACCESS); |
bd4c625c LT |
537 | if (!reiserfs_posixacl(inode->i_sb)) |
538 | return 0; | |
48b32a35 JM |
539 | if (list && size <= list_size) |
540 | memcpy(list, POSIX_ACL_XATTR_ACCESS, size); | |
541 | return size; | |
1da177e4 LT |
542 | } |
543 | ||
48b32a35 | 544 | struct xattr_handler reiserfs_posix_acl_access_handler = { |
9a59f452 | 545 | .prefix = POSIX_ACL_XATTR_ACCESS, |
1da177e4 LT |
546 | .get = posix_acl_access_get, |
547 | .set = posix_acl_access_set, | |
1da177e4 LT |
548 | .list = posix_acl_access_list, |
549 | }; | |
550 | ||
551 | static int | |
bd4c625c LT |
552 | posix_acl_default_get(struct inode *inode, const char *name, |
553 | void *buffer, size_t size) | |
1da177e4 | 554 | { |
bd4c625c | 555 | if (strlen(name) != sizeof(POSIX_ACL_XATTR_DEFAULT) - 1) |
1da177e4 LT |
556 | return -EINVAL; |
557 | return xattr_get_acl(inode, ACL_TYPE_DEFAULT, buffer, size); | |
558 | } | |
559 | ||
560 | static int | |
561 | posix_acl_default_set(struct inode *inode, const char *name, | |
bd4c625c | 562 | const void *value, size_t size, int flags) |
1da177e4 | 563 | { |
bd4c625c | 564 | if (strlen(name) != sizeof(POSIX_ACL_XATTR_DEFAULT) - 1) |
1da177e4 LT |
565 | return -EINVAL; |
566 | return xattr_set_acl(inode, ACL_TYPE_DEFAULT, value, size); | |
567 | } | |
568 | ||
48b32a35 JM |
569 | static size_t posix_acl_default_list(struct inode *inode, char *list, |
570 | size_t list_size, const char *name, | |
571 | size_t name_len) | |
1da177e4 | 572 | { |
48b32a35 | 573 | const size_t size = sizeof(POSIX_ACL_XATTR_DEFAULT); |
bd4c625c LT |
574 | if (!reiserfs_posixacl(inode->i_sb)) |
575 | return 0; | |
48b32a35 JM |
576 | if (list && size <= list_size) |
577 | memcpy(list, POSIX_ACL_XATTR_DEFAULT, size); | |
578 | return size; | |
1da177e4 LT |
579 | } |
580 | ||
48b32a35 | 581 | struct xattr_handler reiserfs_posix_acl_default_handler = { |
9a59f452 | 582 | .prefix = POSIX_ACL_XATTR_DEFAULT, |
1da177e4 LT |
583 | .get = posix_acl_default_get, |
584 | .set = posix_acl_default_set, | |
1da177e4 LT |
585 | .list = posix_acl_default_list, |
586 | }; |