blob: 44474f9b990db532124d29460983858465186e33 [file] [log] [blame]
Randy Dunlap16f7e0f2006-01-11 12:17:46 -08001#include <linux/capability.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07002#include <linux/fs.h>
3#include <linux/posix_acl.h>
Al Virof466c6f2012-03-17 01:16:43 -04004#include "reiserfs.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -07005#include <linux/errno.h>
6#include <linux/pagemap.h>
7#include <linux/xattr.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +09008#include <linux/slab.h>
Christoph Hellwig9a59f452005-06-23 00:10:19 -07009#include <linux/posix_acl_xattr.h>
Al Viroc45ac882012-03-17 00:59:06 -040010#include "xattr.h"
Al Viroa3063ab2012-03-17 01:03:10 -040011#include "acl.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070012#include <asm/uaccess.h>
13
Jeff Mahoney0ab26212009-03-30 14:02:39 -040014static int reiserfs_set_acl(struct reiserfs_transaction_handle *th,
15 struct inode *inode, int type,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070016 struct posix_acl *acl);
Linus Torvalds1da177e2005-04-16 15:20:36 -070017
18static int
Christoph Hellwig431547b2009-11-13 09:52:56 +000019posix_acl_set(struct dentry *dentry, const char *name, const void *value,
20 size_t size, int flags, int type)
Linus Torvalds1da177e2005-04-16 15:20:36 -070021{
Christoph Hellwig431547b2009-11-13 09:52:56 +000022 struct inode *inode = dentry->d_inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -070023 struct posix_acl *acl;
Jeff Mahoney0ab26212009-03-30 14:02:39 -040024 int error, error2;
25 struct reiserfs_transaction_handle th;
26 size_t jcreate_blocks;
Linus Torvalds1da177e2005-04-16 15:20:36 -070027 if (!reiserfs_posixacl(inode->i_sb))
28 return -EOPNOTSUPP;
Serge E. Hallyn2e149672011-03-23 16:43:26 -070029 if (!inode_owner_or_capable(inode))
Linus Torvalds1da177e2005-04-16 15:20:36 -070030 return -EPERM;
31
32 if (value) {
33 acl = posix_acl_from_xattr(value, size);
34 if (IS_ERR(acl)) {
35 return PTR_ERR(acl);
36 } else if (acl) {
37 error = posix_acl_valid(acl);
38 if (error)
39 goto release_and_out;
40 }
41 } else
42 acl = NULL;
43
Jeff Mahoney0ab26212009-03-30 14:02:39 -040044 /* Pessimism: We can't assume that anything from the xattr root up
45 * has been created. */
46
47 jcreate_blocks = reiserfs_xattr_jcreate_nblocks(inode) +
48 reiserfs_xattr_nblocks(inode, size) * 2;
49
50 reiserfs_write_lock(inode->i_sb);
51 error = journal_begin(&th, inode->i_sb, jcreate_blocks);
52 if (error == 0) {
53 error = reiserfs_set_acl(&th, inode, type, acl);
54 error2 = journal_end(&th, inode->i_sb, jcreate_blocks);
55 if (error2)
56 error = error2;
57 }
58 reiserfs_write_unlock(inode->i_sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -070059
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070060 release_and_out:
Linus Torvalds1da177e2005-04-16 15:20:36 -070061 posix_acl_release(acl);
62 return error;
63}
64
Linus Torvalds1da177e2005-04-16 15:20:36 -070065static int
Christoph Hellwig431547b2009-11-13 09:52:56 +000066posix_acl_get(struct dentry *dentry, const char *name, void *buffer,
67 size_t size, int type)
Linus Torvalds1da177e2005-04-16 15:20:36 -070068{
69 struct posix_acl *acl;
70 int error;
71
Christoph Hellwig431547b2009-11-13 09:52:56 +000072 if (!reiserfs_posixacl(dentry->d_sb))
Linus Torvalds1da177e2005-04-16 15:20:36 -070073 return -EOPNOTSUPP;
74
Christoph Hellwig431547b2009-11-13 09:52:56 +000075 acl = reiserfs_get_acl(dentry->d_inode, type);
Linus Torvalds1da177e2005-04-16 15:20:36 -070076 if (IS_ERR(acl))
77 return PTR_ERR(acl);
78 if (acl == NULL)
79 return -ENODATA;
80 error = posix_acl_to_xattr(acl, buffer, size);
81 posix_acl_release(acl);
82
83 return error;
84}
85
Linus Torvalds1da177e2005-04-16 15:20:36 -070086/*
87 * Convert from filesystem to in-memory representation.
88 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070089static struct posix_acl *posix_acl_from_disk(const void *value, size_t size)
Linus Torvalds1da177e2005-04-16 15:20:36 -070090{
91 const char *end = (char *)value + size;
92 int n, count;
93 struct posix_acl *acl;
94
95 if (!value)
96 return NULL;
97 if (size < sizeof(reiserfs_acl_header))
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070098 return ERR_PTR(-EINVAL);
99 if (((reiserfs_acl_header *) value)->a_version !=
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100 cpu_to_le32(REISERFS_ACL_VERSION))
101 return ERR_PTR(-EINVAL);
102 value = (char *)value + sizeof(reiserfs_acl_header);
103 count = reiserfs_acl_count(size);
104 if (count < 0)
105 return ERR_PTR(-EINVAL);
106 if (count == 0)
107 return NULL;
108 acl = posix_acl_alloc(count, GFP_NOFS);
109 if (!acl)
110 return ERR_PTR(-ENOMEM);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700111 for (n = 0; n < count; n++) {
112 reiserfs_acl_entry *entry = (reiserfs_acl_entry *) value;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113 if ((char *)value + sizeof(reiserfs_acl_entry_short) > end)
114 goto fail;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700115 acl->a_entries[n].e_tag = le16_to_cpu(entry->e_tag);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116 acl->a_entries[n].e_perm = le16_to_cpu(entry->e_perm);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700117 switch (acl->a_entries[n].e_tag) {
118 case ACL_USER_OBJ:
119 case ACL_GROUP_OBJ:
120 case ACL_MASK:
121 case ACL_OTHER:
122 value = (char *)value +
123 sizeof(reiserfs_acl_entry_short);
124 acl->a_entries[n].e_id = ACL_UNDEFINED_ID;
125 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700127 case ACL_USER:
128 case ACL_GROUP:
129 value = (char *)value + sizeof(reiserfs_acl_entry);
130 if ((char *)value > end)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131 goto fail;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700132 acl->a_entries[n].e_id = le32_to_cpu(entry->e_id);
133 break;
134
135 default:
136 goto fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137 }
138 }
139 if (value != end)
140 goto fail;
141 return acl;
142
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700143 fail:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144 posix_acl_release(acl);
145 return ERR_PTR(-EINVAL);
146}
147
148/*
149 * Convert from in-memory to filesystem representation.
150 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700151static void *posix_acl_to_disk(const struct posix_acl *acl, size_t * size)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152{
153 reiserfs_acl_header *ext_acl;
154 char *e;
155 int n;
156
157 *size = reiserfs_acl_size(acl->a_count);
Robert P. J. Day5cbded52006-12-13 00:35:56 -0800158 ext_acl = kmalloc(sizeof(reiserfs_acl_header) +
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700159 acl->a_count *
160 sizeof(reiserfs_acl_entry),
161 GFP_NOFS);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162 if (!ext_acl)
163 return ERR_PTR(-ENOMEM);
164 ext_acl->a_version = cpu_to_le32(REISERFS_ACL_VERSION);
165 e = (char *)ext_acl + sizeof(reiserfs_acl_header);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700166 for (n = 0; n < acl->a_count; n++) {
167 reiserfs_acl_entry *entry = (reiserfs_acl_entry *) e;
168 entry->e_tag = cpu_to_le16(acl->a_entries[n].e_tag);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169 entry->e_perm = cpu_to_le16(acl->a_entries[n].e_perm);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700170 switch (acl->a_entries[n].e_tag) {
171 case ACL_USER:
172 case ACL_GROUP:
173 entry->e_id = cpu_to_le32(acl->a_entries[n].e_id);
174 e += sizeof(reiserfs_acl_entry);
175 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700177 case ACL_USER_OBJ:
178 case ACL_GROUP_OBJ:
179 case ACL_MASK:
180 case ACL_OTHER:
181 e += sizeof(reiserfs_acl_entry_short);
182 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700184 default:
185 goto fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186 }
187 }
188 return (char *)ext_acl;
189
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700190 fail:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191 kfree(ext_acl);
192 return ERR_PTR(-EINVAL);
193}
194
195/*
196 * Inode operation get_posix_acl().
197 *
Jes Sorensen1b1dcc12006-01-09 15:59:24 -0800198 * inode->i_mutex: down
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199 * BKL held [before 2.5.x]
200 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700201struct posix_acl *reiserfs_get_acl(struct inode *inode, int type)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202{
203 char *name, *value;
Al Viro073aaa12009-06-09 12:11:54 -0400204 struct posix_acl *acl;
Adrian Bunk3cdc4092006-03-25 03:07:50 -0800205 int size;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206 int retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207
Al Viro073aaa12009-06-09 12:11:54 -0400208 acl = get_cached_acl(inode, type);
209 if (acl != ACL_NOT_CACHED)
210 return acl;
211
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700212 switch (type) {
213 case ACL_TYPE_ACCESS:
214 name = POSIX_ACL_XATTR_ACCESS;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700215 break;
216 case ACL_TYPE_DEFAULT:
217 name = POSIX_ACL_XATTR_DEFAULT;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700218 break;
219 default:
Al Viro073aaa12009-06-09 12:11:54 -0400220 BUG();
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700221 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700223 size = reiserfs_xattr_get(inode, name, NULL, 0);
Adrian Bunk3cdc4092006-03-25 03:07:50 -0800224 if (size < 0) {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700225 if (size == -ENODATA || size == -ENOSYS) {
Al Viro073aaa12009-06-09 12:11:54 -0400226 set_cached_acl(inode, type, NULL);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700227 return NULL;
228 }
229 return ERR_PTR(size);
230 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700232 value = kmalloc(size, GFP_NOFS);
233 if (!value)
234 return ERR_PTR(-ENOMEM);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235
236 retval = reiserfs_xattr_get(inode, name, value, size);
237 if (retval == -ENODATA || retval == -ENOSYS) {
238 /* This shouldn't actually happen as it should have
239 been caught above.. but just in case */
240 acl = NULL;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700241 } else if (retval < 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242 acl = ERR_PTR(retval);
243 } else {
244 acl = posix_acl_from_disk(value, retval);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700245 }
Al Viro073aaa12009-06-09 12:11:54 -0400246 if (!IS_ERR(acl))
247 set_cached_acl(inode, type, acl);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248
249 kfree(value);
250 return acl;
251}
252
253/*
254 * Inode operation set_posix_acl().
255 *
Jes Sorensen1b1dcc12006-01-09 15:59:24 -0800256 * inode->i_mutex: down
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257 * BKL held [before 2.5.x]
258 */
259static int
Jeff Mahoney0ab26212009-03-30 14:02:39 -0400260reiserfs_set_acl(struct reiserfs_transaction_handle *th, struct inode *inode,
261 int type, struct posix_acl *acl)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700263 char *name;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264 void *value = NULL;
Jeff Mahoney48b32a32009-03-30 14:02:38 -0400265 size_t size = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266 int error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267
268 if (S_ISLNK(inode->i_mode))
269 return -EOPNOTSUPP;
270
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700271 switch (type) {
272 case ACL_TYPE_ACCESS:
273 name = POSIX_ACL_XATTR_ACCESS;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700274 if (acl) {
Al Virod6952122011-07-23 18:56:36 -0400275 error = posix_acl_equiv_mode(acl, &inode->i_mode);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700276 if (error < 0)
277 return error;
278 else {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700279 if (error == 0)
280 acl = NULL;
281 }
282 }
283 break;
284 case ACL_TYPE_DEFAULT:
285 name = POSIX_ACL_XATTR_DEFAULT;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700286 if (!S_ISDIR(inode->i_mode))
287 return acl ? -EACCES : 0;
288 break;
289 default:
290 return -EINVAL;
291 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700293 if (acl) {
294 value = posix_acl_to_disk(acl, &size);
295 if (IS_ERR(value))
296 return (int)PTR_ERR(value);
Jeff Mahoney48b32a32009-03-30 14:02:38 -0400297 }
298
Jeff Mahoney0ab26212009-03-30 14:02:39 -0400299 error = reiserfs_xattr_set_handle(th, inode, name, value, size, 0);
Jeff Mahoney48b32a32009-03-30 14:02:38 -0400300
301 /*
302 * Ensure that the inode gets dirtied if we're only using
303 * the mode bits and an old ACL didn't exist. We don't need
304 * to check if the inode is hashed here since we won't get
305 * called by reiserfs_inherit_default_acl().
306 */
307 if (error == -ENODATA) {
308 error = 0;
309 if (type == ACL_TYPE_ACCESS) {
310 inode->i_ctime = CURRENT_TIME_SEC;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700311 mark_inode_dirty(inode);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700312 }
313 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314
James Lamanna833d3042005-10-30 15:00:16 -0800315 kfree(value);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700316
Jeff Mahoneyd9845612009-03-30 14:02:35 -0400317 if (!error)
Al Viro073aaa12009-06-09 12:11:54 -0400318 set_cached_acl(inode, type, acl);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319
320 return error;
321}
322
Jes Sorensen1b1dcc12006-01-09 15:59:24 -0800323/* dir->i_mutex: locked,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700324 * inode is new and not released into the wild yet */
325int
Jeff Mahoney0ab26212009-03-30 14:02:39 -0400326reiserfs_inherit_default_acl(struct reiserfs_transaction_handle *th,
327 struct inode *dir, struct dentry *dentry,
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700328 struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700330 struct posix_acl *acl;
331 int err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700333 /* ACLs only get applied to files and directories */
334 if (S_ISLNK(inode->i_mode))
335 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700337 /* ACLs can only be used on "new" objects, so if it's an old object
338 * there is nothing to inherit from */
339 if (get_inode_sd_version(dir) == STAT_DATA_V1)
340 goto apply_umask;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700342 /* Don't apply ACLs to objects in the .reiserfs_priv tree.. This
343 * would be useless since permissions are ignored, and a pain because
344 * it introduces locking cycles */
Jeff Mahoney6dfede692009-03-30 14:02:32 -0400345 if (IS_PRIVATE(dir)) {
346 inode->i_flags |= S_PRIVATE;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700347 goto apply_umask;
348 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700350 acl = reiserfs_get_acl(dir, ACL_TYPE_DEFAULT);
Al Viro7a77b152009-06-08 21:01:13 -0400351 if (IS_ERR(acl))
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700352 return PTR_ERR(acl);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700354 if (acl) {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700355 /* Copy the default ACL to the default ACL of a new directory */
356 if (S_ISDIR(inode->i_mode)) {
Jeff Mahoney0ab26212009-03-30 14:02:39 -0400357 err = reiserfs_set_acl(th, inode, ACL_TYPE_DEFAULT,
358 acl);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700359 if (err)
360 goto cleanup;
361 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700363 /* Now we reconcile the new ACL and the mode,
364 potentially modifying both */
Al Virod3fb6122011-07-23 18:37:50 -0400365 err = posix_acl_create(&acl, GFP_NOFS, &inode->i_mode);
Al Viro826cae22011-07-23 03:10:32 -0400366 if (err < 0)
367 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368
Al Viro826cae22011-07-23 03:10:32 -0400369 /* If we need an ACL.. */
370 if (err > 0)
371 err = reiserfs_set_acl(th, inode, ACL_TYPE_ACCESS, acl);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700372 cleanup:
373 posix_acl_release(acl);
374 } else {
375 apply_umask:
376 /* no ACL, apply umask */
Al Viroce3b0f82009-03-29 19:08:22 -0400377 inode->i_mode &= ~current_umask();
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700378 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700380 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381}
382
Jeff Mahoney0ab26212009-03-30 14:02:39 -0400383/* This is used to cache the default acl before a new object is created.
384 * The biggest reason for this is to get an idea of how many blocks will
385 * actually be required for the create operation if we must inherit an ACL.
386 * An ACL write can add up to 3 object creations and an additional file write
387 * so we'd prefer not to reserve that many blocks in the journal if we can.
388 * It also has the advantage of not loading the ACL with a transaction open,
389 * this may seem silly, but if the owner of the directory is doing the
390 * creation, the ACL may not be loaded since the permissions wouldn't require
391 * it.
392 * We return the number of blocks required for the transaction.
393 */
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700394int reiserfs_cache_default_acl(struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395{
Jeff Mahoney0ab26212009-03-30 14:02:39 -0400396 struct posix_acl *acl;
397 int nblocks = 0;
398
399 if (IS_PRIVATE(inode))
400 return 0;
401
402 acl = reiserfs_get_acl(inode, ACL_TYPE_DEFAULT);
403
404 if (acl && !IS_ERR(acl)) {
405 int size = reiserfs_acl_size(acl->a_count);
406
407 /* Other xattrs can be created during inode creation. We don't
408 * want to claim too many blocks, so we check to see if we
409 * we need to create the tree to the xattrs, and then we
410 * just want two files. */
411 nblocks = reiserfs_xattr_jcreate_nblocks(inode);
412 nblocks += JOURNAL_BLOCKS_PER_OBJECT(inode->i_sb);
413
414 REISERFS_I(inode)->i_flags |= i_has_xattr_dir;
415
416 /* We need to account for writes + bitmaps for two files */
417 nblocks += reiserfs_xattr_nblocks(inode, size) * 4;
418 posix_acl_release(acl);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419 }
420
Jeff Mahoney0ab26212009-03-30 14:02:39 -0400421 return nblocks;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700422}
423
424int reiserfs_acl_chmod(struct inode *inode)
425{
Al Virobc26ab52011-07-23 00:18:02 -0400426 struct reiserfs_transaction_handle th;
427 struct posix_acl *acl;
428 size_t size;
429 int depth;
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700430 int error;
431
432 if (S_ISLNK(inode->i_mode))
433 return -EOPNOTSUPP;
434
435 if (get_inode_sd_version(inode) == STAT_DATA_V1 ||
436 !reiserfs_posixacl(inode->i_sb)) {
437 return 0;
438 }
439
Frederic Weisbecker6c287052010-01-07 12:57:47 +0100440 reiserfs_write_unlock(inode->i_sb);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700441 acl = reiserfs_get_acl(inode, ACL_TYPE_ACCESS);
Frederic Weisbecker6c287052010-01-07 12:57:47 +0100442 reiserfs_write_lock(inode->i_sb);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700443 if (!acl)
444 return 0;
445 if (IS_ERR(acl))
446 return PTR_ERR(acl);
Al Virobc26ab52011-07-23 00:18:02 -0400447 error = posix_acl_chmod(&acl, GFP_NOFS, inode->i_mode);
448 if (error)
449 return error;
Frederic Weisbecker238af872010-12-02 14:31:16 -0800450
Al Virobc26ab52011-07-23 00:18:02 -0400451 size = reiserfs_xattr_nblocks(inode, reiserfs_acl_size(acl->a_count));
452 depth = reiserfs_write_lock_once(inode->i_sb);
453 error = journal_begin(&th, inode->i_sb, size * 2);
454 if (!error) {
455 int error2;
456 error = reiserfs_set_acl(&th, inode, ACL_TYPE_ACCESS, acl);
457 error2 = journal_end(&th, inode->i_sb, size * 2);
458 if (error2)
459 error = error2;
Jeff Mahoney0ab26212009-03-30 14:02:39 -0400460 }
Al Virobc26ab52011-07-23 00:18:02 -0400461 reiserfs_write_unlock_once(inode->i_sb, depth);
462 posix_acl_release(acl);
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700463 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700464}
465
Christoph Hellwig431547b2009-11-13 09:52:56 +0000466static size_t posix_acl_access_list(struct dentry *dentry, char *list,
Jeff Mahoney48b32a32009-03-30 14:02:38 -0400467 size_t list_size, const char *name,
Christoph Hellwig431547b2009-11-13 09:52:56 +0000468 size_t name_len, int type)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469{
Jeff Mahoney48b32a32009-03-30 14:02:38 -0400470 const size_t size = sizeof(POSIX_ACL_XATTR_ACCESS);
Christoph Hellwig431547b2009-11-13 09:52:56 +0000471 if (!reiserfs_posixacl(dentry->d_sb))
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700472 return 0;
Jeff Mahoney48b32a32009-03-30 14:02:38 -0400473 if (list && size <= list_size)
474 memcpy(list, POSIX_ACL_XATTR_ACCESS, size);
475 return size;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476}
477
Stephen Hemminger94d09a92010-05-13 17:53:19 -0700478const struct xattr_handler reiserfs_posix_acl_access_handler = {
Christoph Hellwig9a59f452005-06-23 00:10:19 -0700479 .prefix = POSIX_ACL_XATTR_ACCESS,
Christoph Hellwig431547b2009-11-13 09:52:56 +0000480 .flags = ACL_TYPE_ACCESS,
481 .get = posix_acl_get,
482 .set = posix_acl_set,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483 .list = posix_acl_access_list,
484};
485
Christoph Hellwig431547b2009-11-13 09:52:56 +0000486static size_t posix_acl_default_list(struct dentry *dentry, char *list,
Jeff Mahoney48b32a32009-03-30 14:02:38 -0400487 size_t list_size, const char *name,
Christoph Hellwig431547b2009-11-13 09:52:56 +0000488 size_t name_len, int type)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700489{
Jeff Mahoney48b32a32009-03-30 14:02:38 -0400490 const size_t size = sizeof(POSIX_ACL_XATTR_DEFAULT);
Christoph Hellwig431547b2009-11-13 09:52:56 +0000491 if (!reiserfs_posixacl(dentry->d_sb))
Linus Torvaldsbd4c6252005-07-12 20:21:28 -0700492 return 0;
Jeff Mahoney48b32a32009-03-30 14:02:38 -0400493 if (list && size <= list_size)
494 memcpy(list, POSIX_ACL_XATTR_DEFAULT, size);
495 return size;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700496}
497
Stephen Hemminger94d09a92010-05-13 17:53:19 -0700498const struct xattr_handler reiserfs_posix_acl_default_handler = {
Christoph Hellwig9a59f452005-06-23 00:10:19 -0700499 .prefix = POSIX_ACL_XATTR_DEFAULT,
Christoph Hellwig431547b2009-11-13 09:52:56 +0000500 .flags = ACL_TYPE_DEFAULT,
501 .get = posix_acl_get,
502 .set = posix_acl_set,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503 .list = posix_acl_default_list,
504};