Commit | Line | Data |
---|---|---|
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 | ||
191 | /* | |
192 | * Inode operation get_posix_acl(). | |
193 | * | |
1b1dcc1b | 194 | * inode->i_mutex: down |
1da177e4 LT |
195 | * BKL held [before 2.5.x] |
196 | */ | |
bd4c625c | 197 | struct posix_acl *reiserfs_get_acl(struct inode *inode, int type) |
1da177e4 LT |
198 | { |
199 | char *name, *value; | |
073aaa1b | 200 | struct posix_acl *acl; |
3cdc409c | 201 | int size; |
1da177e4 | 202 | int retval; |
bd4c625c | 203 | |
073aaa1b AV |
204 | acl = get_cached_acl(inode, type); |
205 | if (acl != ACL_NOT_CACHED) | |
206 | return acl; | |
207 | ||
bd4c625c LT |
208 | switch (type) { |
209 | case ACL_TYPE_ACCESS: | |
210 | name = POSIX_ACL_XATTR_ACCESS; | |
bd4c625c LT |
211 | break; |
212 | case ACL_TYPE_DEFAULT: | |
213 | name = POSIX_ACL_XATTR_DEFAULT; | |
bd4c625c LT |
214 | break; |
215 | default: | |
073aaa1b | 216 | BUG(); |
bd4c625c LT |
217 | } |
218 | ||
bd4c625c | 219 | size = reiserfs_xattr_get(inode, name, NULL, 0); |
3cdc409c | 220 | if (size < 0) { |
bd4c625c | 221 | if (size == -ENODATA || size == -ENOSYS) { |
073aaa1b | 222 | set_cached_acl(inode, type, NULL); |
bd4c625c LT |
223 | return NULL; |
224 | } | |
225 | return ERR_PTR(size); | |
226 | } | |
1da177e4 | 227 | |
bd4c625c LT |
228 | value = kmalloc(size, GFP_NOFS); |
229 | if (!value) | |
230 | return ERR_PTR(-ENOMEM); | |
1da177e4 LT |
231 | |
232 | retval = reiserfs_xattr_get(inode, name, value, size); | |
233 | if (retval == -ENODATA || retval == -ENOSYS) { | |
234 | /* This shouldn't actually happen as it should have | |
235 | been caught above.. but just in case */ | |
236 | acl = NULL; | |
bd4c625c | 237 | } else if (retval < 0) { |
1da177e4 LT |
238 | acl = ERR_PTR(retval); |
239 | } else { | |
240 | acl = posix_acl_from_disk(value, retval); | |
bd4c625c | 241 | } |
073aaa1b AV |
242 | if (!IS_ERR(acl)) |
243 | set_cached_acl(inode, type, acl); | |
1da177e4 LT |
244 | |
245 | kfree(value); | |
246 | return acl; | |
247 | } | |
248 | ||
249 | /* | |
250 | * Inode operation set_posix_acl(). | |
251 | * | |
1b1dcc1b | 252 | * inode->i_mutex: down |
1da177e4 LT |
253 | * BKL held [before 2.5.x] |
254 | */ | |
255 | static int | |
0ab2621e JM |
256 | reiserfs_set_acl(struct reiserfs_transaction_handle *th, struct inode *inode, |
257 | int type, struct posix_acl *acl) | |
1da177e4 | 258 | { |
bd4c625c | 259 | char *name; |
1da177e4 | 260 | void *value = NULL; |
48b32a35 | 261 | size_t size = 0; |
1da177e4 | 262 | int error; |
1da177e4 LT |
263 | |
264 | if (S_ISLNK(inode->i_mode)) | |
265 | return -EOPNOTSUPP; | |
266 | ||
bd4c625c LT |
267 | switch (type) { |
268 | case ACL_TYPE_ACCESS: | |
269 | name = POSIX_ACL_XATTR_ACCESS; | |
bd4c625c LT |
270 | if (acl) { |
271 | mode_t mode = inode->i_mode; | |
272 | error = posix_acl_equiv_mode(acl, &mode); | |
273 | if (error < 0) | |
274 | return error; | |
275 | else { | |
276 | inode->i_mode = mode; | |
277 | if (error == 0) | |
278 | acl = NULL; | |
279 | } | |
280 | } | |
281 | break; | |
282 | case ACL_TYPE_DEFAULT: | |
283 | name = POSIX_ACL_XATTR_DEFAULT; | |
bd4c625c LT |
284 | if (!S_ISDIR(inode->i_mode)) |
285 | return acl ? -EACCES : 0; | |
286 | break; | |
287 | default: | |
288 | return -EINVAL; | |
289 | } | |
290 | ||
291 | if (acl) { | |
292 | value = posix_acl_to_disk(acl, &size); | |
293 | if (IS_ERR(value)) | |
294 | return (int)PTR_ERR(value); | |
48b32a35 JM |
295 | } |
296 | ||
0ab2621e | 297 | error = reiserfs_xattr_set_handle(th, inode, name, value, size, 0); |
48b32a35 JM |
298 | |
299 | /* | |
300 | * Ensure that the inode gets dirtied if we're only using | |
301 | * the mode bits and an old ACL didn't exist. We don't need | |
302 | * to check if the inode is hashed here since we won't get | |
303 | * called by reiserfs_inherit_default_acl(). | |
304 | */ | |
305 | if (error == -ENODATA) { | |
306 | error = 0; | |
307 | if (type == ACL_TYPE_ACCESS) { | |
308 | inode->i_ctime = CURRENT_TIME_SEC; | |
bd4c625c | 309 | mark_inode_dirty(inode); |
bd4c625c LT |
310 | } |
311 | } | |
1da177e4 | 312 | |
833d304b | 313 | kfree(value); |
1da177e4 | 314 | |
d984561b | 315 | if (!error) |
073aaa1b | 316 | set_cached_acl(inode, type, acl); |
1da177e4 LT |
317 | |
318 | return error; | |
319 | } | |
320 | ||
1b1dcc1b | 321 | /* dir->i_mutex: locked, |
1da177e4 LT |
322 | * inode is new and not released into the wild yet */ |
323 | int | |
0ab2621e JM |
324 | reiserfs_inherit_default_acl(struct reiserfs_transaction_handle *th, |
325 | struct inode *dir, struct dentry *dentry, | |
bd4c625c | 326 | struct inode *inode) |
1da177e4 | 327 | { |
bd4c625c LT |
328 | struct posix_acl *acl; |
329 | int err = 0; | |
330 | ||
331 | /* ACLs only get applied to files and directories */ | |
332 | if (S_ISLNK(inode->i_mode)) | |
333 | return 0; | |
334 | ||
335 | /* ACLs can only be used on "new" objects, so if it's an old object | |
336 | * there is nothing to inherit from */ | |
337 | if (get_inode_sd_version(dir) == STAT_DATA_V1) | |
338 | goto apply_umask; | |
339 | ||
340 | /* Don't apply ACLs to objects in the .reiserfs_priv tree.. This | |
341 | * would be useless since permissions are ignored, and a pain because | |
342 | * it introduces locking cycles */ | |
6dfede69 JM |
343 | if (IS_PRIVATE(dir)) { |
344 | inode->i_flags |= S_PRIVATE; | |
bd4c625c LT |
345 | goto apply_umask; |
346 | } | |
347 | ||
348 | acl = reiserfs_get_acl(dir, ACL_TYPE_DEFAULT); | |
7a77b15d | 349 | if (IS_ERR(acl)) |
bd4c625c | 350 | return PTR_ERR(acl); |
bd4c625c LT |
351 | |
352 | if (acl) { | |
353 | struct posix_acl *acl_copy; | |
354 | mode_t mode = inode->i_mode; | |
355 | int need_acl; | |
356 | ||
357 | /* Copy the default ACL to the default ACL of a new directory */ | |
358 | if (S_ISDIR(inode->i_mode)) { | |
0ab2621e JM |
359 | err = reiserfs_set_acl(th, inode, ACL_TYPE_DEFAULT, |
360 | acl); | |
bd4c625c LT |
361 | if (err) |
362 | goto cleanup; | |
363 | } | |
364 | ||
365 | /* Now we reconcile the new ACL and the mode, | |
366 | potentially modifying both */ | |
367 | acl_copy = posix_acl_clone(acl, GFP_NOFS); | |
368 | if (!acl_copy) { | |
369 | err = -ENOMEM; | |
370 | goto cleanup; | |
371 | } | |
372 | ||
373 | need_acl = posix_acl_create_masq(acl_copy, &mode); | |
374 | if (need_acl >= 0) { | |
375 | if (mode != inode->i_mode) { | |
376 | inode->i_mode = mode; | |
377 | } | |
378 | ||
379 | /* If we need an ACL.. */ | |
380 | if (need_acl > 0) { | |
0ab2621e JM |
381 | err = reiserfs_set_acl(th, inode, |
382 | ACL_TYPE_ACCESS, | |
383 | acl_copy); | |
bd4c625c LT |
384 | if (err) |
385 | goto cleanup_copy; | |
386 | } | |
387 | } | |
388 | cleanup_copy: | |
389 | posix_acl_release(acl_copy); | |
390 | cleanup: | |
391 | posix_acl_release(acl); | |
392 | } else { | |
393 | apply_umask: | |
394 | /* no ACL, apply umask */ | |
ce3b0f8d | 395 | inode->i_mode &= ~current_umask(); |
bd4c625c LT |
396 | } |
397 | ||
398 | return err; | |
1da177e4 LT |
399 | } |
400 | ||
0ab2621e JM |
401 | /* This is used to cache the default acl before a new object is created. |
402 | * The biggest reason for this is to get an idea of how many blocks will | |
403 | * actually be required for the create operation if we must inherit an ACL. | |
404 | * An ACL write can add up to 3 object creations and an additional file write | |
405 | * so we'd prefer not to reserve that many blocks in the journal if we can. | |
406 | * It also has the advantage of not loading the ACL with a transaction open, | |
407 | * this may seem silly, but if the owner of the directory is doing the | |
408 | * creation, the ACL may not be loaded since the permissions wouldn't require | |
409 | * it. | |
410 | * We return the number of blocks required for the transaction. | |
411 | */ | |
bd4c625c | 412 | int reiserfs_cache_default_acl(struct inode *inode) |
1da177e4 | 413 | { |
0ab2621e JM |
414 | struct posix_acl *acl; |
415 | int nblocks = 0; | |
416 | ||
417 | if (IS_PRIVATE(inode)) | |
418 | return 0; | |
419 | ||
420 | acl = reiserfs_get_acl(inode, ACL_TYPE_DEFAULT); | |
421 | ||
422 | if (acl && !IS_ERR(acl)) { | |
423 | int size = reiserfs_acl_size(acl->a_count); | |
424 | ||
425 | /* Other xattrs can be created during inode creation. We don't | |
426 | * want to claim too many blocks, so we check to see if we | |
427 | * we need to create the tree to the xattrs, and then we | |
428 | * just want two files. */ | |
429 | nblocks = reiserfs_xattr_jcreate_nblocks(inode); | |
430 | nblocks += JOURNAL_BLOCKS_PER_OBJECT(inode->i_sb); | |
431 | ||
432 | REISERFS_I(inode)->i_flags |= i_has_xattr_dir; | |
433 | ||
434 | /* We need to account for writes + bitmaps for two files */ | |
435 | nblocks += reiserfs_xattr_nblocks(inode, size) * 4; | |
436 | posix_acl_release(acl); | |
bd4c625c LT |
437 | } |
438 | ||
0ab2621e | 439 | return nblocks; |
1da177e4 LT |
440 | } |
441 | ||
bd4c625c | 442 | int reiserfs_acl_chmod(struct inode *inode) |
1da177e4 | 443 | { |
bd4c625c LT |
444 | struct posix_acl *acl, *clone; |
445 | int error; | |
1da177e4 | 446 | |
bd4c625c LT |
447 | if (S_ISLNK(inode->i_mode)) |
448 | return -EOPNOTSUPP; | |
1da177e4 | 449 | |
bd4c625c LT |
450 | if (get_inode_sd_version(inode) == STAT_DATA_V1 || |
451 | !reiserfs_posixacl(inode->i_sb)) { | |
452 | return 0; | |
1da177e4 LT |
453 | } |
454 | ||
bd4c625c | 455 | acl = reiserfs_get_acl(inode, ACL_TYPE_ACCESS); |
bd4c625c LT |
456 | if (!acl) |
457 | return 0; | |
458 | if (IS_ERR(acl)) | |
459 | return PTR_ERR(acl); | |
460 | clone = posix_acl_clone(acl, GFP_NOFS); | |
461 | posix_acl_release(acl); | |
462 | if (!clone) | |
463 | return -ENOMEM; | |
464 | error = posix_acl_chmod_masq(clone, inode->i_mode); | |
0ab2621e JM |
465 | if (!error) { |
466 | struct reiserfs_transaction_handle th; | |
467 | size_t size = reiserfs_xattr_nblocks(inode, | |
468 | reiserfs_acl_size(clone->a_count)); | |
469 | reiserfs_write_lock(inode->i_sb); | |
470 | error = journal_begin(&th, inode->i_sb, size * 2); | |
471 | if (!error) { | |
472 | int error2; | |
473 | error = reiserfs_set_acl(&th, inode, ACL_TYPE_ACCESS, | |
474 | clone); | |
475 | error2 = journal_end(&th, inode->i_sb, size * 2); | |
476 | if (error2) | |
477 | error = error2; | |
478 | } | |
479 | reiserfs_write_unlock(inode->i_sb); | |
480 | } | |
bd4c625c LT |
481 | posix_acl_release(clone); |
482 | return error; | |
1da177e4 LT |
483 | } |
484 | ||
485 | static int | |
486 | posix_acl_access_get(struct inode *inode, const char *name, | |
bd4c625c | 487 | void *buffer, size_t size) |
1da177e4 | 488 | { |
bd4c625c | 489 | if (strlen(name) != sizeof(POSIX_ACL_XATTR_ACCESS) - 1) |
1da177e4 LT |
490 | return -EINVAL; |
491 | return xattr_get_acl(inode, ACL_TYPE_ACCESS, buffer, size); | |
492 | } | |
493 | ||
494 | static int | |
495 | posix_acl_access_set(struct inode *inode, const char *name, | |
bd4c625c | 496 | const void *value, size_t size, int flags) |
1da177e4 | 497 | { |
bd4c625c | 498 | if (strlen(name) != sizeof(POSIX_ACL_XATTR_ACCESS) - 1) |
1da177e4 LT |
499 | return -EINVAL; |
500 | return xattr_set_acl(inode, ACL_TYPE_ACCESS, value, size); | |
501 | } | |
502 | ||
48b32a35 JM |
503 | static size_t posix_acl_access_list(struct inode *inode, char *list, |
504 | size_t list_size, const char *name, | |
505 | size_t name_len) | |
1da177e4 | 506 | { |
48b32a35 | 507 | const size_t size = sizeof(POSIX_ACL_XATTR_ACCESS); |
bd4c625c LT |
508 | if (!reiserfs_posixacl(inode->i_sb)) |
509 | return 0; | |
48b32a35 JM |
510 | if (list && size <= list_size) |
511 | memcpy(list, POSIX_ACL_XATTR_ACCESS, size); | |
512 | return size; | |
1da177e4 LT |
513 | } |
514 | ||
48b32a35 | 515 | struct xattr_handler reiserfs_posix_acl_access_handler = { |
9a59f452 | 516 | .prefix = POSIX_ACL_XATTR_ACCESS, |
1da177e4 LT |
517 | .get = posix_acl_access_get, |
518 | .set = posix_acl_access_set, | |
1da177e4 LT |
519 | .list = posix_acl_access_list, |
520 | }; | |
521 | ||
522 | static int | |
bd4c625c LT |
523 | posix_acl_default_get(struct inode *inode, const char *name, |
524 | void *buffer, size_t size) | |
1da177e4 | 525 | { |
bd4c625c | 526 | if (strlen(name) != sizeof(POSIX_ACL_XATTR_DEFAULT) - 1) |
1da177e4 LT |
527 | return -EINVAL; |
528 | return xattr_get_acl(inode, ACL_TYPE_DEFAULT, buffer, size); | |
529 | } | |
530 | ||
531 | static int | |
532 | posix_acl_default_set(struct inode *inode, const char *name, | |
bd4c625c | 533 | const void *value, size_t size, int flags) |
1da177e4 | 534 | { |
bd4c625c | 535 | if (strlen(name) != sizeof(POSIX_ACL_XATTR_DEFAULT) - 1) |
1da177e4 LT |
536 | return -EINVAL; |
537 | return xattr_set_acl(inode, ACL_TYPE_DEFAULT, value, size); | |
538 | } | |
539 | ||
48b32a35 JM |
540 | static size_t posix_acl_default_list(struct inode *inode, char *list, |
541 | size_t list_size, const char *name, | |
542 | size_t name_len) | |
1da177e4 | 543 | { |
48b32a35 | 544 | const size_t size = sizeof(POSIX_ACL_XATTR_DEFAULT); |
bd4c625c LT |
545 | if (!reiserfs_posixacl(inode->i_sb)) |
546 | return 0; | |
48b32a35 JM |
547 | if (list && size <= list_size) |
548 | memcpy(list, POSIX_ACL_XATTR_DEFAULT, size); | |
549 | return size; | |
1da177e4 LT |
550 | } |
551 | ||
48b32a35 | 552 | struct xattr_handler reiserfs_posix_acl_default_handler = { |
9a59f452 | 553 | .prefix = POSIX_ACL_XATTR_DEFAULT, |
1da177e4 LT |
554 | .get = posix_acl_default_get, |
555 | .set = posix_acl_default_set, | |
1da177e4 LT |
556 | .list = posix_acl_default_list, |
557 | }; |