blob: 39a54a0e9fe4a9a6290f75b961cde9ccea06f669 [file] [log] [blame]
Dave Kleikampac27a0e2006-10-11 01:20:50 -07001/*
Mingming Cao617ba132006-10-11 01:20:53 -07002 * linux/fs/ext4/acl.c
Dave Kleikampac27a0e2006-10-11 01:20:50 -07003 *
4 * Copyright (C) 2001-2003 Andreas Gruenbacher, <agruen@suse.de>
5 */
6
7#include <linux/init.h>
8#include <linux/sched.h>
9#include <linux/slab.h>
10#include <linux/capability.h>
11#include <linux/fs.h>
Christoph Hellwig3dcf5452008-04-29 18:13:32 -040012#include "ext4_jbd2.h"
13#include "ext4.h"
Dave Kleikampac27a0e2006-10-11 01:20:50 -070014#include "xattr.h"
15#include "acl.h"
16
17/*
18 * Convert from filesystem to in-memory representation.
19 */
20static struct posix_acl *
Mingming Cao617ba132006-10-11 01:20:53 -070021ext4_acl_from_disk(const void *value, size_t size)
Dave Kleikampac27a0e2006-10-11 01:20:50 -070022{
23 const char *end = (char *)value + size;
24 int n, count;
25 struct posix_acl *acl;
26
27 if (!value)
28 return NULL;
Mingming Cao617ba132006-10-11 01:20:53 -070029 if (size < sizeof(ext4_acl_header))
Dave Kleikampac27a0e2006-10-11 01:20:50 -070030 return ERR_PTR(-EINVAL);
Mingming Cao617ba132006-10-11 01:20:53 -070031 if (((ext4_acl_header *)value)->a_version !=
32 cpu_to_le32(EXT4_ACL_VERSION))
Dave Kleikampac27a0e2006-10-11 01:20:50 -070033 return ERR_PTR(-EINVAL);
Mingming Cao617ba132006-10-11 01:20:53 -070034 value = (char *)value + sizeof(ext4_acl_header);
35 count = ext4_acl_count(size);
Dave Kleikampac27a0e2006-10-11 01:20:50 -070036 if (count < 0)
37 return ERR_PTR(-EINVAL);
38 if (count == 0)
39 return NULL;
Josef Bacik216553c2008-04-29 22:02:02 -040040 acl = posix_acl_alloc(count, GFP_NOFS);
Dave Kleikampac27a0e2006-10-11 01:20:50 -070041 if (!acl)
42 return ERR_PTR(-ENOMEM);
Theodore Ts'o2b2d6d02008-07-26 16:15:44 -040043 for (n = 0; n < count; n++) {
Mingming Cao617ba132006-10-11 01:20:53 -070044 ext4_acl_entry *entry =
45 (ext4_acl_entry *)value;
46 if ((char *)value + sizeof(ext4_acl_entry_short) > end)
Dave Kleikampac27a0e2006-10-11 01:20:50 -070047 goto fail;
48 acl->a_entries[n].e_tag = le16_to_cpu(entry->e_tag);
49 acl->a_entries[n].e_perm = le16_to_cpu(entry->e_perm);
Dave Kleikampac27a0e2006-10-11 01:20:50 -070050
Theodore Ts'o2b2d6d02008-07-26 16:15:44 -040051 switch (acl->a_entries[n].e_tag) {
52 case ACL_USER_OBJ:
53 case ACL_GROUP_OBJ:
54 case ACL_MASK:
55 case ACL_OTHER:
56 value = (char *)value +
57 sizeof(ext4_acl_entry_short);
Theodore Ts'o2b2d6d02008-07-26 16:15:44 -040058 break;
Dave Kleikampac27a0e2006-10-11 01:20:50 -070059
Theodore Ts'o2b2d6d02008-07-26 16:15:44 -040060 case ACL_USER:
Eric W. Biedermanaf84df92012-09-10 20:44:54 -070061 value = (char *)value + sizeof(ext4_acl_entry);
62 if ((char *)value > end)
63 goto fail;
64 acl->a_entries[n].e_uid =
65 make_kuid(&init_user_ns,
66 le32_to_cpu(entry->e_id));
67 break;
Theodore Ts'o2b2d6d02008-07-26 16:15:44 -040068 case ACL_GROUP:
69 value = (char *)value + sizeof(ext4_acl_entry);
70 if ((char *)value > end)
Dave Kleikampac27a0e2006-10-11 01:20:50 -070071 goto fail;
Eric W. Biedermanaf84df92012-09-10 20:44:54 -070072 acl->a_entries[n].e_gid =
73 make_kgid(&init_user_ns,
74 le32_to_cpu(entry->e_id));
Theodore Ts'o2b2d6d02008-07-26 16:15:44 -040075 break;
76
77 default:
78 goto fail;
Dave Kleikampac27a0e2006-10-11 01:20:50 -070079 }
80 }
81 if (value != end)
82 goto fail;
83 return acl;
84
85fail:
86 posix_acl_release(acl);
87 return ERR_PTR(-EINVAL);
88}
89
90/*
91 * Convert from in-memory to filesystem representation.
92 */
93static void *
Mingming Cao617ba132006-10-11 01:20:53 -070094ext4_acl_to_disk(const struct posix_acl *acl, size_t *size)
Dave Kleikampac27a0e2006-10-11 01:20:50 -070095{
Mingming Cao617ba132006-10-11 01:20:53 -070096 ext4_acl_header *ext_acl;
Dave Kleikampac27a0e2006-10-11 01:20:50 -070097 char *e;
98 size_t n;
99
Mingming Cao617ba132006-10-11 01:20:53 -0700100 *size = ext4_acl_size(acl->a_count);
101 ext_acl = kmalloc(sizeof(ext4_acl_header) + acl->a_count *
Josef Bacik216553c2008-04-29 22:02:02 -0400102 sizeof(ext4_acl_entry), GFP_NOFS);
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700103 if (!ext_acl)
104 return ERR_PTR(-ENOMEM);
Mingming Cao617ba132006-10-11 01:20:53 -0700105 ext_acl->a_version = cpu_to_le32(EXT4_ACL_VERSION);
106 e = (char *)ext_acl + sizeof(ext4_acl_header);
Theodore Ts'o2b2d6d02008-07-26 16:15:44 -0400107 for (n = 0; n < acl->a_count; n++) {
Eric W. Biedermanaf84df92012-09-10 20:44:54 -0700108 const struct posix_acl_entry *acl_e = &acl->a_entries[n];
Mingming Cao617ba132006-10-11 01:20:53 -0700109 ext4_acl_entry *entry = (ext4_acl_entry *)e;
Eric W. Biedermanaf84df92012-09-10 20:44:54 -0700110 entry->e_tag = cpu_to_le16(acl_e->e_tag);
111 entry->e_perm = cpu_to_le16(acl_e->e_perm);
112 switch (acl_e->e_tag) {
Theodore Ts'o2b2d6d02008-07-26 16:15:44 -0400113 case ACL_USER:
Eric W. Biedermanaf84df92012-09-10 20:44:54 -0700114 entry->e_id = cpu_to_le32(
115 from_kuid(&init_user_ns, acl_e->e_uid));
116 e += sizeof(ext4_acl_entry);
117 break;
Theodore Ts'o2b2d6d02008-07-26 16:15:44 -0400118 case ACL_GROUP:
Eric W. Biedermanaf84df92012-09-10 20:44:54 -0700119 entry->e_id = cpu_to_le32(
120 from_kgid(&init_user_ns, acl_e->e_gid));
Theodore Ts'o2b2d6d02008-07-26 16:15:44 -0400121 e += sizeof(ext4_acl_entry);
122 break;
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700123
Theodore Ts'o2b2d6d02008-07-26 16:15:44 -0400124 case ACL_USER_OBJ:
125 case ACL_GROUP_OBJ:
126 case ACL_MASK:
127 case ACL_OTHER:
128 e += sizeof(ext4_acl_entry_short);
129 break;
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700130
Theodore Ts'o2b2d6d02008-07-26 16:15:44 -0400131 default:
132 goto fail;
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700133 }
134 }
135 return (char *)ext_acl;
136
137fail:
138 kfree(ext_acl);
139 return ERR_PTR(-EINVAL);
140}
141
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700142/*
143 * Inode operation get_posix_acl().
144 *
145 * inode->i_mutex: don't care
146 */
Christoph Hellwig4e34e712011-07-23 17:37:31 +0200147struct posix_acl *
Mingming Cao617ba132006-10-11 01:20:53 -0700148ext4_get_acl(struct inode *inode, int type)
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700149{
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700150 int name_index;
151 char *value = NULL;
152 struct posix_acl *acl;
153 int retval;
154
155 if (!test_opt(inode->i_sb, POSIX_ACL))
156 return NULL;
157
Al Viro073aaa12009-06-09 12:11:54 -0400158 acl = get_cached_acl(inode, type);
159 if (acl != ACL_NOT_CACHED)
160 return acl;
161
Theodore Ts'o2b2d6d02008-07-26 16:15:44 -0400162 switch (type) {
163 case ACL_TYPE_ACCESS:
Theodore Ts'o2b2d6d02008-07-26 16:15:44 -0400164 name_index = EXT4_XATTR_INDEX_POSIX_ACL_ACCESS;
165 break;
Theodore Ts'o2b2d6d02008-07-26 16:15:44 -0400166 case ACL_TYPE_DEFAULT:
Theodore Ts'o2b2d6d02008-07-26 16:15:44 -0400167 name_index = EXT4_XATTR_INDEX_POSIX_ACL_DEFAULT;
168 break;
Theodore Ts'o2b2d6d02008-07-26 16:15:44 -0400169 default:
Al Viro073aaa12009-06-09 12:11:54 -0400170 BUG();
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700171 }
Mingming Cao617ba132006-10-11 01:20:53 -0700172 retval = ext4_xattr_get(inode, name_index, "", NULL, 0);
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700173 if (retval > 0) {
Josef Bacik216553c2008-04-29 22:02:02 -0400174 value = kmalloc(retval, GFP_NOFS);
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700175 if (!value)
176 return ERR_PTR(-ENOMEM);
Mingming Cao617ba132006-10-11 01:20:53 -0700177 retval = ext4_xattr_get(inode, name_index, "", value, retval);
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700178 }
179 if (retval > 0)
Mingming Cao617ba132006-10-11 01:20:53 -0700180 acl = ext4_acl_from_disk(value, retval);
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700181 else if (retval == -ENODATA || retval == -ENOSYS)
182 acl = NULL;
183 else
184 acl = ERR_PTR(retval);
185 kfree(value);
186
Al Viro073aaa12009-06-09 12:11:54 -0400187 if (!IS_ERR(acl))
188 set_cached_acl(inode, type, acl);
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700189
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700190 return acl;
191}
192
193/*
194 * Set the access or default ACL of an inode.
195 *
Mingming Cao617ba132006-10-11 01:20:53 -0700196 * inode->i_mutex: down unless called from ext4_new_inode
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700197 */
198static int
Mingming Cao617ba132006-10-11 01:20:53 -0700199ext4_set_acl(handle_t *handle, struct inode *inode, int type,
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700200 struct posix_acl *acl)
201{
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700202 int name_index;
203 void *value = NULL;
204 size_t size = 0;
205 int error;
206
207 if (S_ISLNK(inode->i_mode))
208 return -EOPNOTSUPP;
209
Theodore Ts'o2b2d6d02008-07-26 16:15:44 -0400210 switch (type) {
211 case ACL_TYPE_ACCESS:
212 name_index = EXT4_XATTR_INDEX_POSIX_ACL_ACCESS;
213 if (acl) {
Al Virod6952122011-07-23 18:56:36 -0400214 error = posix_acl_equiv_mode(acl, &inode->i_mode);
Theodore Ts'o2b2d6d02008-07-26 16:15:44 -0400215 if (error < 0)
216 return error;
217 else {
Jan Karac6ac12a2010-06-15 12:19:59 -0400218 inode->i_ctime = ext4_current_time(inode);
Theodore Ts'o2b2d6d02008-07-26 16:15:44 -0400219 ext4_mark_inode_dirty(handle, inode);
220 if (error == 0)
221 acl = NULL;
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700222 }
Theodore Ts'o2b2d6d02008-07-26 16:15:44 -0400223 }
224 break;
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700225
Theodore Ts'o2b2d6d02008-07-26 16:15:44 -0400226 case ACL_TYPE_DEFAULT:
227 name_index = EXT4_XATTR_INDEX_POSIX_ACL_DEFAULT;
228 if (!S_ISDIR(inode->i_mode))
229 return acl ? -EACCES : 0;
230 break;
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700231
Theodore Ts'o2b2d6d02008-07-26 16:15:44 -0400232 default:
233 return -EINVAL;
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700234 }
235 if (acl) {
Mingming Cao617ba132006-10-11 01:20:53 -0700236 value = ext4_acl_to_disk(acl, &size);
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700237 if (IS_ERR(value))
238 return (int)PTR_ERR(value);
239 }
240
Mingming Cao617ba132006-10-11 01:20:53 -0700241 error = ext4_xattr_set_handle(handle, inode, name_index, "",
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700242 value, size, 0);
243
244 kfree(value);
Al Viro073aaa12009-06-09 12:11:54 -0400245 if (!error)
246 set_cached_acl(inode, type, acl);
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700247
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700248 return error;
249}
250
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700251/*
Mingming Cao617ba132006-10-11 01:20:53 -0700252 * Initialize the ACLs of a new inode. Called from ext4_new_inode.
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700253 *
254 * dir->i_mutex: down
255 * inode->i_mutex: up (access to inode is still exclusive)
256 */
257int
Mingming Cao617ba132006-10-11 01:20:53 -0700258ext4_init_acl(handle_t *handle, struct inode *inode, struct inode *dir)
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700259{
260 struct posix_acl *acl = NULL;
261 int error = 0;
262
263 if (!S_ISLNK(inode->i_mode)) {
264 if (test_opt(dir->i_sb, POSIX_ACL)) {
Mingming Cao617ba132006-10-11 01:20:53 -0700265 acl = ext4_get_acl(dir, ACL_TYPE_DEFAULT);
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700266 if (IS_ERR(acl))
267 return PTR_ERR(acl);
268 }
269 if (!acl)
Al Viroce3b0f82009-03-29 19:08:22 -0400270 inode->i_mode &= ~current_umask();
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700271 }
272 if (test_opt(inode->i_sb, POSIX_ACL) && acl) {
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700273 if (S_ISDIR(inode->i_mode)) {
Mingming Cao617ba132006-10-11 01:20:53 -0700274 error = ext4_set_acl(handle, inode,
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700275 ACL_TYPE_DEFAULT, acl);
276 if (error)
277 goto cleanup;
278 }
Al Virod3fb6122011-07-23 18:37:50 -0400279 error = posix_acl_create(&acl, GFP_NOFS, &inode->i_mode);
Al Viro826cae22011-07-23 03:10:32 -0400280 if (error < 0)
281 return error;
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700282
Al Viro826cae22011-07-23 03:10:32 -0400283 if (error > 0) {
284 /* This is an extended ACL */
285 error = ext4_set_acl(handle, inode, ACL_TYPE_ACCESS, acl);
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700286 }
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700287 }
288cleanup:
289 posix_acl_release(acl);
290 return error;
291}
292
293/*
294 * Does chmod for an inode that may have an Access Control List. The
295 * inode->i_mode field must be updated to the desired value by the caller
296 * before calling this function.
297 * Returns 0 on success, or a negative error number.
298 *
299 * We change the ACL rather than storing some ACL entries in the file
300 * mode permission bits (which would be more efficient), because that
301 * would break once additional permissions (like ACL_APPEND, ACL_DELETE
302 * for directories) are added. There are no more bits available in the
303 * file mode.
304 *
305 * inode->i_mutex: down
306 */
307int
Mingming Cao617ba132006-10-11 01:20:53 -0700308ext4_acl_chmod(struct inode *inode)
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700309{
Al Virobc26ab52011-07-23 00:18:02 -0400310 struct posix_acl *acl;
311 handle_t *handle;
312 int retries = 0;
Andrew Morton63f57932006-10-11 01:21:24 -0700313 int error;
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700314
Al Virobc26ab52011-07-23 00:18:02 -0400315
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700316 if (S_ISLNK(inode->i_mode))
317 return -EOPNOTSUPP;
318 if (!test_opt(inode->i_sb, POSIX_ACL))
319 return 0;
Mingming Cao617ba132006-10-11 01:20:53 -0700320 acl = ext4_get_acl(inode, ACL_TYPE_ACCESS);
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700321 if (IS_ERR(acl) || !acl)
322 return PTR_ERR(acl);
Al Virobc26ab52011-07-23 00:18:02 -0400323 error = posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode);
324 if (error)
325 return error;
326retry:
Theodore Ts'o9924a922013-02-08 21:59:22 -0500327 handle = ext4_journal_start(inode, EXT4_HT_XATTR,
Theodore Ts'o95eaefb2013-02-09 15:23:03 -0500328 ext4_jbd2_credits_xattr(inode));
Al Virobc26ab52011-07-23 00:18:02 -0400329 if (IS_ERR(handle)) {
330 error = PTR_ERR(handle);
331 ext4_std_error(inode->i_sb, error);
332 goto out;
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700333 }
Al Virobc26ab52011-07-23 00:18:02 -0400334 error = ext4_set_acl(handle, inode, ACL_TYPE_ACCESS, acl);
335 ext4_journal_stop(handle);
336 if (error == -ENOSPC &&
337 ext4_should_retry_alloc(inode->i_sb, &retries))
338 goto retry;
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700339out:
Al Virobc26ab52011-07-23 00:18:02 -0400340 posix_acl_release(acl);
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700341 return error;
342}
343
344/*
345 * Extended attribute handlers
346 */
347static size_t
Christoph Hellwig431547b2009-11-13 09:52:56 +0000348ext4_xattr_list_acl_access(struct dentry *dentry, char *list, size_t list_len,
349 const char *name, size_t name_len, int type)
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700350{
351 const size_t size = sizeof(POSIX_ACL_XATTR_ACCESS);
352
Christoph Hellwig431547b2009-11-13 09:52:56 +0000353 if (!test_opt(dentry->d_sb, POSIX_ACL))
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700354 return 0;
355 if (list && size <= list_len)
356 memcpy(list, POSIX_ACL_XATTR_ACCESS, size);
357 return size;
358}
359
360static size_t
Christoph Hellwig431547b2009-11-13 09:52:56 +0000361ext4_xattr_list_acl_default(struct dentry *dentry, char *list, size_t list_len,
362 const char *name, size_t name_len, int type)
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700363{
364 const size_t size = sizeof(POSIX_ACL_XATTR_DEFAULT);
365
Christoph Hellwig431547b2009-11-13 09:52:56 +0000366 if (!test_opt(dentry->d_sb, POSIX_ACL))
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700367 return 0;
368 if (list && size <= list_len)
369 memcpy(list, POSIX_ACL_XATTR_DEFAULT, size);
370 return size;
371}
372
373static int
Christoph Hellwig431547b2009-11-13 09:52:56 +0000374ext4_xattr_get_acl(struct dentry *dentry, const char *name, void *buffer,
375 size_t size, int type)
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700376{
377 struct posix_acl *acl;
378 int error;
379
Christoph Hellwig431547b2009-11-13 09:52:56 +0000380 if (strcmp(name, "") != 0)
381 return -EINVAL;
382 if (!test_opt(dentry->d_sb, POSIX_ACL))
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700383 return -EOPNOTSUPP;
384
Christoph Hellwig431547b2009-11-13 09:52:56 +0000385 acl = ext4_get_acl(dentry->d_inode, type);
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700386 if (IS_ERR(acl))
387 return PTR_ERR(acl);
388 if (acl == NULL)
389 return -ENODATA;
Eric W. Biederman5f3a4a22012-09-10 20:17:44 -0700390 error = posix_acl_to_xattr(&init_user_ns, acl, buffer, size);
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700391 posix_acl_release(acl);
392
393 return error;
394}
395
396static int
Christoph Hellwig431547b2009-11-13 09:52:56 +0000397ext4_xattr_set_acl(struct dentry *dentry, const char *name, const void *value,
398 size_t size, int flags, int type)
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700399{
Christoph Hellwig431547b2009-11-13 09:52:56 +0000400 struct inode *inode = dentry->d_inode;
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700401 handle_t *handle;
402 struct posix_acl *acl;
403 int error, retries = 0;
404
Christoph Hellwig431547b2009-11-13 09:52:56 +0000405 if (strcmp(name, "") != 0)
406 return -EINVAL;
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700407 if (!test_opt(inode->i_sb, POSIX_ACL))
408 return -EOPNOTSUPP;
Serge E. Hallyn2e149672011-03-23 16:43:26 -0700409 if (!inode_owner_or_capable(inode))
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700410 return -EPERM;
411
412 if (value) {
Eric W. Biederman5f3a4a22012-09-10 20:17:44 -0700413 acl = posix_acl_from_xattr(&init_user_ns, value, size);
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700414 if (IS_ERR(acl))
415 return PTR_ERR(acl);
416 else if (acl) {
417 error = posix_acl_valid(acl);
418 if (error)
419 goto release_and_out;
420 }
421 } else
422 acl = NULL;
423
424retry:
Theodore Ts'o9924a922013-02-08 21:59:22 -0500425 handle = ext4_journal_start(inode, EXT4_HT_XATTR,
Theodore Ts'o95eaefb2013-02-09 15:23:03 -0500426 ext4_jbd2_credits_xattr(inode));
Eugene Shatokhin24ec19b2012-11-08 15:11:11 -0500427 if (IS_ERR(handle)) {
428 error = PTR_ERR(handle);
429 goto release_and_out;
430 }
Mingming Cao617ba132006-10-11 01:20:53 -0700431 error = ext4_set_acl(handle, inode, type, acl);
432 ext4_journal_stop(handle);
433 if (error == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries))
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700434 goto retry;
435
436release_and_out:
437 posix_acl_release(acl);
438 return error;
439}
440
Stephen Hemminger11e27522010-05-13 17:53:18 -0700441const struct xattr_handler ext4_xattr_acl_access_handler = {
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700442 .prefix = POSIX_ACL_XATTR_ACCESS,
Christoph Hellwig431547b2009-11-13 09:52:56 +0000443 .flags = ACL_TYPE_ACCESS,
Mingming Cao617ba132006-10-11 01:20:53 -0700444 .list = ext4_xattr_list_acl_access,
Christoph Hellwig431547b2009-11-13 09:52:56 +0000445 .get = ext4_xattr_get_acl,
446 .set = ext4_xattr_set_acl,
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700447};
448
Stephen Hemminger11e27522010-05-13 17:53:18 -0700449const struct xattr_handler ext4_xattr_acl_default_handler = {
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700450 .prefix = POSIX_ACL_XATTR_DEFAULT,
Christoph Hellwig431547b2009-11-13 09:52:56 +0000451 .flags = ACL_TYPE_DEFAULT,
Mingming Cao617ba132006-10-11 01:20:53 -0700452 .list = ext4_xattr_list_acl_default,
Christoph Hellwig431547b2009-11-13 09:52:56 +0000453 .get = ext4_xattr_get_acl,
454 .set = ext4_xattr_set_acl,
Dave Kleikampac27a0e2006-10-11 01:20:50 -0700455};