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authorChristoph Hellwig <hch@lst.de>2009-06-10 11:07:47 -0400
committerChristoph Hellwig <hch@brick.lst.de>2009-06-10 11:07:47 -0400
commitef14f0c1578dce4b688726eb2603e50b62d6665a (patch)
tree5a221081850fab8f96455745e90f4a0e2127bce0 /fs/xfs
parent8b5403a6d772d340541cfb30a668fde119c40ac1 (diff)
xfs: use generic Posix ACL code
This patch rips out the XFS ACL handling code and uses the generic fs/posix_acl.c code instead. The ondisk format is of course left unchanged. This also introduces the same ACL caching all other Linux filesystems do by adding pointers to the acl and default acl in struct xfs_inode. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Eric Sandeen <sandeen@sandeen.net>
Diffstat (limited to 'fs/xfs')
-rw-r--r--fs/xfs/Kconfig1
-rw-r--r--fs/xfs/Makefile2
-rw-r--r--fs/xfs/linux-2.6/xfs_acl.c523
-rw-r--r--fs/xfs/linux-2.6/xfs_ioctl.c1
-rw-r--r--fs/xfs/linux-2.6/xfs_iops.c53
-rw-r--r--fs/xfs/linux-2.6/xfs_lrw.c1
-rw-r--r--fs/xfs/linux-2.6/xfs_super.c14
-rw-r--r--fs/xfs/linux-2.6/xfs_xattr.c67
-rw-r--r--fs/xfs/quota/xfs_dquot.c1
-rw-r--r--fs/xfs/quota/xfs_dquot_item.c1
-rw-r--r--fs/xfs/quota/xfs_qm.c1
-rw-r--r--fs/xfs/quota/xfs_qm_bhv.c1
-rw-r--r--fs/xfs/quota/xfs_qm_stats.c1
-rw-r--r--fs/xfs/quota/xfs_qm_syscalls.c1
-rw-r--r--fs/xfs/quota/xfs_trans_dquot.c1
-rw-r--r--fs/xfs/xfs_acl.c874
-rw-r--r--fs/xfs/xfs_acl.h97
-rw-r--r--fs/xfs/xfs_arch.h32
-rw-r--r--fs/xfs/xfs_attr.c1
-rw-r--r--fs/xfs/xfs_iget.c3
-rw-r--r--fs/xfs/xfs_inode.c1
-rw-r--r--fs/xfs/xfs_inode.h6
-rw-r--r--fs/xfs/xfs_iomap.c1
-rw-r--r--fs/xfs/xfs_rw.c1
-rw-r--r--fs/xfs/xfs_vnodeops.c15
-rw-r--r--fs/xfs/xfs_vnodeops.h1
26 files changed, 598 insertions, 1103 deletions
diff --git a/fs/xfs/Kconfig b/fs/xfs/Kconfig
index 29228f5899cd..480f28127f09 100644
--- a/fs/xfs/Kconfig
+++ b/fs/xfs/Kconfig
@@ -39,6 +39,7 @@ config XFS_QUOTA
39config XFS_POSIX_ACL 39config XFS_POSIX_ACL
40 bool "XFS POSIX ACL support" 40 bool "XFS POSIX ACL support"
41 depends on XFS_FS 41 depends on XFS_FS
42 select FS_POSIX_ACL
42 help 43 help
43 POSIX Access Control Lists (ACLs) support permissions for users and 44 POSIX Access Control Lists (ACLs) support permissions for users and
44 groups beyond the owner/group/world scheme. 45 groups beyond the owner/group/world scheme.
diff --git a/fs/xfs/Makefile b/fs/xfs/Makefile
index 222c59e541ce..7a59daed1782 100644
--- a/fs/xfs/Makefile
+++ b/fs/xfs/Makefile
@@ -40,7 +40,7 @@ xfs-$(CONFIG_PROC_FS) += quota/xfs_qm_stats.o
40endif 40endif
41 41
42xfs-$(CONFIG_XFS_RT) += xfs_rtalloc.o 42xfs-$(CONFIG_XFS_RT) += xfs_rtalloc.o
43xfs-$(CONFIG_XFS_POSIX_ACL) += xfs_acl.o 43xfs-$(CONFIG_XFS_POSIX_ACL) += $(XFS_LINUX)/xfs_acl.o
44xfs-$(CONFIG_PROC_FS) += $(XFS_LINUX)/xfs_stats.o 44xfs-$(CONFIG_PROC_FS) += $(XFS_LINUX)/xfs_stats.o
45xfs-$(CONFIG_SYSCTL) += $(XFS_LINUX)/xfs_sysctl.o 45xfs-$(CONFIG_SYSCTL) += $(XFS_LINUX)/xfs_sysctl.o
46xfs-$(CONFIG_COMPAT) += $(XFS_LINUX)/xfs_ioctl32.o 46xfs-$(CONFIG_COMPAT) += $(XFS_LINUX)/xfs_ioctl32.o
diff --git a/fs/xfs/linux-2.6/xfs_acl.c b/fs/xfs/linux-2.6/xfs_acl.c
new file mode 100644
index 000000000000..1e9d1246eebc
--- /dev/null
+++ b/fs/xfs/linux-2.6/xfs_acl.c
@@ -0,0 +1,523 @@
1/*
2 * Copyright (c) 2008, Christoph Hellwig
3 * All Rights Reserved.
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18#include "xfs.h"
19#include "xfs_acl.h"
20#include "xfs_attr.h"
21#include "xfs_bmap_btree.h"
22#include "xfs_inode.h"
23#include "xfs_vnodeops.h"
24#include <linux/xattr.h>
25#include <linux/posix_acl_xattr.h>
26
27
28#define XFS_ACL_NOT_CACHED ((void *)-1)
29
30/*
31 * Locking scheme:
32 * - all ACL updates are protected by inode->i_mutex, which is taken before
33 * calling into this file.
34 * - access and updates to the ip->i_acl and ip->i_default_acl pointers are
35 * protected by inode->i_lock.
36 */
37
38STATIC struct posix_acl *
39xfs_acl_from_disk(struct xfs_acl *aclp)
40{
41 struct posix_acl_entry *acl_e;
42 struct posix_acl *acl;
43 struct xfs_acl_entry *ace;
44 int count, i;
45
46 count = be32_to_cpu(aclp->acl_cnt);
47
48 acl = posix_acl_alloc(count, GFP_KERNEL);
49 if (!acl)
50 return ERR_PTR(-ENOMEM);
51
52 for (i = 0; i < count; i++) {
53 acl_e = &acl->a_entries[i];
54 ace = &aclp->acl_entry[i];
55
56 /*
57 * The tag is 32 bits on disk and 16 bits in core.
58 *
59 * Because every access to it goes through the core
60 * format first this is not a problem.
61 */
62 acl_e->e_tag = be32_to_cpu(ace->ae_tag);
63 acl_e->e_perm = be16_to_cpu(ace->ae_perm);
64
65 switch (acl_e->e_tag) {
66 case ACL_USER:
67 case ACL_GROUP:
68 acl_e->e_id = be32_to_cpu(ace->ae_id);
69 break;
70 case ACL_USER_OBJ:
71 case ACL_GROUP_OBJ:
72 case ACL_MASK:
73 case ACL_OTHER:
74 acl_e->e_id = ACL_UNDEFINED_ID;
75 break;
76 default:
77 goto fail;
78 }
79 }
80 return acl;
81
82fail:
83 posix_acl_release(acl);
84 return ERR_PTR(-EINVAL);
85}
86
87STATIC void
88xfs_acl_to_disk(struct xfs_acl *aclp, const struct posix_acl *acl)
89{
90 const struct posix_acl_entry *acl_e;
91 struct xfs_acl_entry *ace;
92 int i;
93
94 aclp->acl_cnt = cpu_to_be32(acl->a_count);
95 for (i = 0; i < acl->a_count; i++) {
96 ace = &aclp->acl_entry[i];
97 acl_e = &acl->a_entries[i];
98
99 ace->ae_tag = cpu_to_be32(acl_e->e_tag);
100 ace->ae_id = cpu_to_be32(acl_e->e_id);
101 ace->ae_perm = cpu_to_be16(acl_e->e_perm);
102 }
103}
104
105/*
106 * Update the cached ACL pointer in the inode.
107 *
108 * Because we don't hold any locks while reading/writing the attribute
109 * from/to disk another thread could have raced and updated the cached
110 * ACL value before us. In that case we release the previous cached value
111 * and update it with our new value.
112 */
113STATIC void
114xfs_update_cached_acl(struct inode *inode, struct posix_acl **p_acl,
115 struct posix_acl *acl)
116{
117 spin_lock(&inode->i_lock);
118 if (*p_acl && *p_acl != XFS_ACL_NOT_CACHED)
119 posix_acl_release(*p_acl);
120 *p_acl = posix_acl_dup(acl);
121 spin_unlock(&inode->i_lock);
122}
123
124struct posix_acl *
125xfs_get_acl(struct inode *inode, int type)
126{
127 struct xfs_inode *ip = XFS_I(inode);
128 struct posix_acl *acl = NULL, **p_acl;
129 struct xfs_acl *xfs_acl;
130 int len = sizeof(struct xfs_acl);
131 char *ea_name;
132 int error;
133
134 switch (type) {
135 case ACL_TYPE_ACCESS:
136 ea_name = SGI_ACL_FILE;
137 p_acl = &ip->i_acl;
138 break;
139 case ACL_TYPE_DEFAULT:
140 ea_name = SGI_ACL_DEFAULT;
141 p_acl = &ip->i_default_acl;
142 break;
143 default:
144 return ERR_PTR(-EINVAL);
145 }
146
147 spin_lock(&inode->i_lock);
148 if (*p_acl != XFS_ACL_NOT_CACHED)
149 acl = posix_acl_dup(*p_acl);
150 spin_unlock(&inode->i_lock);
151
152 /*
153 * If we have a cached ACLs value just return it, not need to
154 * go out to the disk.
155 */
156 if (acl)
157 return acl;
158
159 xfs_acl = kzalloc(sizeof(struct xfs_acl), GFP_KERNEL);
160 if (!xfs_acl)
161 return ERR_PTR(-ENOMEM);
162
163 error = -xfs_attr_get(ip, ea_name, (char *)xfs_acl, &len, ATTR_ROOT);
164 if (error) {
165 /*
166 * If the attribute doesn't exist make sure we have a negative
167 * cache entry, for any other error assume it is transient and
168 * leave the cache entry as XFS_ACL_NOT_CACHED.
169 */
170 if (error == -ENOATTR) {
171 acl = NULL;
172 goto out_update_cache;
173 }
174 goto out;
175 }
176
177 acl = xfs_acl_from_disk(xfs_acl);
178 if (IS_ERR(acl))
179 goto out;
180
181 out_update_cache:
182 xfs_update_cached_acl(inode, p_acl, acl);
183 out:
184 kfree(xfs_acl);
185 return acl;
186}
187
188STATIC int
189xfs_set_acl(struct inode *inode, int type, struct posix_acl *acl)
190{
191 struct xfs_inode *ip = XFS_I(inode);
192 struct posix_acl **p_acl;
193 char *ea_name;
194 int error;
195
196 if (S_ISLNK(inode->i_mode))
197 return -EOPNOTSUPP;
198
199 switch (type) {
200 case ACL_TYPE_ACCESS:
201 ea_name = SGI_ACL_FILE;
202 p_acl = &ip->i_acl;
203 break;
204 case ACL_TYPE_DEFAULT:
205 if (!S_ISDIR(inode->i_mode))
206 return acl ? -EACCES : 0;
207 ea_name = SGI_ACL_DEFAULT;
208 p_acl = &ip->i_default_acl;
209 break;
210 default:
211 return -EINVAL;
212 }
213
214 if (acl) {
215 struct xfs_acl *xfs_acl;
216 int len;
217
218 xfs_acl = kzalloc(sizeof(struct xfs_acl), GFP_KERNEL);
219 if (!xfs_acl)
220 return -ENOMEM;
221
222 xfs_acl_to_disk(xfs_acl, acl);
223 len = sizeof(struct xfs_acl) -
224 (sizeof(struct xfs_acl_entry) *
225 (XFS_ACL_MAX_ENTRIES - acl->a_count));
226
227 error = -xfs_attr_set(ip, ea_name, (char *)xfs_acl,
228 len, ATTR_ROOT);
229
230 kfree(xfs_acl);
231 } else {
232 /*
233 * A NULL ACL argument means we want to remove the ACL.
234 */
235 error = -xfs_attr_remove(ip, ea_name, ATTR_ROOT);
236
237 /*
238 * If the attribute didn't exist to start with that's fine.
239 */
240 if (error == -ENOATTR)
241 error = 0;
242 }
243
244 if (!error)
245 xfs_update_cached_acl(inode, p_acl, acl);
246 return error;
247}
248
249int
250xfs_check_acl(struct inode *inode, int mask)
251{
252 struct xfs_inode *ip = XFS_I(inode);
253 struct posix_acl *acl;
254 int error = -EAGAIN;
255
256 xfs_itrace_entry(ip);
257
258 /*
259 * If there is no attribute fork no ACL exists on this inode and
260 * we can skip the whole exercise.
261 */
262 if (!XFS_IFORK_Q(ip))
263 return -EAGAIN;
264
265 acl = xfs_get_acl(inode, ACL_TYPE_ACCESS);
266 if (IS_ERR(acl))
267 return PTR_ERR(acl);
268 if (acl) {
269 error = posix_acl_permission(inode, acl, mask);
270 posix_acl_release(acl);
271 }
272
273 return error;
274}
275
276static int
277xfs_set_mode(struct inode *inode, mode_t mode)
278{
279 int error = 0;
280
281 if (mode != inode->i_mode) {
282 struct iattr iattr;
283
284 iattr.ia_valid = ATTR_MODE;
285 iattr.ia_mode = mode;
286
287 error = -xfs_setattr(XFS_I(inode), &iattr, XFS_ATTR_NOACL);
288 }
289
290 return error;
291}
292
293static int
294xfs_acl_exists(struct inode *inode, char *name)
295{
296 int len = sizeof(struct xfs_acl);
297
298 return (xfs_attr_get(XFS_I(inode), name, NULL, &len,
299 ATTR_ROOT|ATTR_KERNOVAL) == 0);
300}
301
302int
303posix_acl_access_exists(struct inode *inode)
304{
305 return xfs_acl_exists(inode, SGI_ACL_FILE);
306}
307
308int
309posix_acl_default_exists(struct inode *inode)
310{
311 if (!S_ISDIR(inode->i_mode))
312 return 0;
313 return xfs_acl_exists(inode, SGI_ACL_DEFAULT);
314}
315
316/*
317 * No need for i_mutex because the inode is not yet exposed to the VFS.
318 */
319int
320xfs_inherit_acl(struct inode *inode, struct posix_acl *default_acl)
321{
322 struct posix_acl *clone;
323 mode_t mode;
324 int error = 0, inherit = 0;
325
326 if (S_ISDIR(inode->i_mode)) {
327 error = xfs_set_acl(inode, ACL_TYPE_DEFAULT, default_acl);
328 if (error)
329 return error;
330 }
331
332 clone = posix_acl_clone(default_acl, GFP_KERNEL);
333 if (!clone)
334 return -ENOMEM;
335
336 mode = inode->i_mode;
337 error = posix_acl_create_masq(clone, &mode);
338 if (error < 0)
339 goto out_release_clone;
340
341 /*
342 * If posix_acl_create_masq returns a positive value we need to
343 * inherit a permission that can't be represented using the Unix
344 * mode bits and we actually need to set an ACL.
345 */
346 if (error > 0)
347 inherit = 1;
348
349 error = xfs_set_mode(inode, mode);
350 if (error)
351 goto out_release_clone;
352
353 if (inherit)
354 error = xfs_set_acl(inode, ACL_TYPE_ACCESS, clone);
355
356 out_release_clone:
357 posix_acl_release(clone);
358 return error;
359}
360
361int
362xfs_acl_chmod(struct inode *inode)
363{
364 struct posix_acl *acl, *clone;
365 int error;
366
367 if (S_ISLNK(inode->i_mode))
368 return -EOPNOTSUPP;
369
370 acl = xfs_get_acl(inode, ACL_TYPE_ACCESS);
371 if (IS_ERR(acl) || !acl)
372 return PTR_ERR(acl);
373
374 clone = posix_acl_clone(acl, GFP_KERNEL);
375 posix_acl_release(acl);
376 if (!clone)
377 return -ENOMEM;
378
379 error = posix_acl_chmod_masq(clone, inode->i_mode);
380 if (!error)
381 error = xfs_set_acl(inode, ACL_TYPE_ACCESS, clone);
382
383 posix_acl_release(clone);
384 return error;
385}
386
387void
388xfs_inode_init_acls(struct xfs_inode *ip)
389{
390 /*
391 * No need for locking, inode is not live yet.
392 */
393 ip->i_acl = XFS_ACL_NOT_CACHED;
394 ip->i_default_acl = XFS_ACL_NOT_CACHED;
395}
396
397void
398xfs_inode_clear_acls(struct xfs_inode *ip)
399{
400 /*
401 * No need for locking here, the inode is not live anymore
402 * and just about to be freed.
403 */
404 if (ip->i_acl != XFS_ACL_NOT_CACHED)
405 posix_acl_release(ip->i_acl);
406 if (ip->i_default_acl != XFS_ACL_NOT_CACHED)
407 posix_acl_release(ip->i_default_acl);
408}
409
410
411/*
412 * System xattr handlers.
413 *
414 * Currently Posix ACLs are the only system namespace extended attribute
415 * handlers supported by XFS, so we just implement the handlers here.
416 * If we ever support other system extended attributes this will need
417 * some refactoring.
418 */
419
420static int
421xfs_decode_acl(const char *name)
422{
423 if (strcmp(name, "posix_acl_access") == 0)
424 return ACL_TYPE_ACCESS;
425 else if (strcmp(name, "posix_acl_default") == 0)
426 return ACL_TYPE_DEFAULT;
427 return -EINVAL;
428}
429
430static int
431xfs_xattr_system_get(struct inode *inode, const char *name,
432 void *value, size_t size)
433{
434 struct posix_acl *acl;
435 int type, error;
436
437 type = xfs_decode_acl(name);
438 if (type < 0)
439 return type;
440
441 acl = xfs_get_acl(inode, type);
442 if (IS_ERR(acl))
443 return PTR_ERR(acl);
444 if (acl == NULL)
445 return -ENODATA;
446
447 error = posix_acl_to_xattr(acl, value, size);
448 posix_acl_release(acl);
449
450 return error;
451}
452
453static int
454xfs_xattr_system_set(struct inode *inode, const char *name,
455 const void *value, size_t size, int flags)
456{
457 struct posix_acl *acl = NULL;
458 int error = 0, type;
459
460 type = xfs_decode_acl(name);
461 if (type < 0)
462 return type;
463 if (flags & XATTR_CREATE)
464 return -EINVAL;
465 if (type == ACL_TYPE_DEFAULT && !S_ISDIR(inode->i_mode))
466 return value ? -EACCES : 0;
467 if ((current_fsuid() != inode->i_uid) && !capable(CAP_FOWNER))
468 return -EPERM;
469
470 if (!value)
471 goto set_acl;
472
473 acl = posix_acl_from_xattr(value, size);
474 if (!acl) {
475 /*
476 * acl_set_file(3) may request that we set default ACLs with
477 * zero length -- defend (gracefully) against that here.
478 */
479 goto out;
480 }
481 if (IS_ERR(acl)) {
482 error = PTR_ERR(acl);
483 goto out;
484 }
485
486 error = posix_acl_valid(acl);
487 if (error)
488 goto out_release;
489
490 error = -EINVAL;
491 if (acl->a_count > XFS_ACL_MAX_ENTRIES)
492 goto out_release;
493
494 if (type == ACL_TYPE_ACCESS) {
495 mode_t mode = inode->i_mode;
496 error = posix_acl_equiv_mode(acl, &mode);
497
498 if (error <= 0) {
499 posix_acl_release(acl);
500 acl = NULL;
501
502 if (error < 0)
503 return error;
504 }
505
506 error = xfs_set_mode(inode, mode);
507 if (error)
508 goto out_release;
509 }
510
511 set_acl:
512 error = xfs_set_acl(inode, type, acl);
513 out_release:
514 posix_acl_release(acl);
515 out:
516 return error;
517}
518
519struct xattr_handler xfs_xattr_system_handler = {
520 .prefix = XATTR_SYSTEM_PREFIX,
521 .get = xfs_xattr_system_get,
522 .set = xfs_xattr_system_set,
523};
diff --git a/fs/xfs/linux-2.6/xfs_ioctl.c b/fs/xfs/linux-2.6/xfs_ioctl.c
index c7d684f02f89..182d4be9ffab 100644
--- a/fs/xfs/linux-2.6/xfs_ioctl.c
+++ b/fs/xfs/linux-2.6/xfs_ioctl.c
@@ -41,7 +41,6 @@
41#include "xfs_itable.h" 41#include "xfs_itable.h"
42#include "xfs_error.h" 42#include "xfs_error.h"
43#include "xfs_rw.h" 43#include "xfs_rw.h"
44#include "xfs_acl.h"
45#include "xfs_attr.h" 44#include "xfs_attr.h"
46#include "xfs_bmap.h" 45#include "xfs_bmap.h"
47#include "xfs_buf_item.h" 46#include "xfs_buf_item.h"
diff --git a/fs/xfs/linux-2.6/xfs_iops.c b/fs/xfs/linux-2.6/xfs_iops.c
index 631d0137551e..84e391ab70b0 100644
--- a/fs/xfs/linux-2.6/xfs_iops.c
+++ b/fs/xfs/linux-2.6/xfs_iops.c
@@ -17,6 +17,7 @@
17 */ 17 */
18#include "xfs.h" 18#include "xfs.h"
19#include "xfs_fs.h" 19#include "xfs_fs.h"
20#include "xfs_acl.h"
20#include "xfs_bit.h" 21#include "xfs_bit.h"
21#include "xfs_log.h" 22#include "xfs_log.h"
22#include "xfs_inum.h" 23#include "xfs_inum.h"
@@ -51,6 +52,7 @@
51#include <linux/capability.h> 52#include <linux/capability.h>
52#include <linux/xattr.h> 53#include <linux/xattr.h>
53#include <linux/namei.h> 54#include <linux/namei.h>
55#include <linux/posix_acl.h>
54#include <linux/security.h> 56#include <linux/security.h>
55#include <linux/falloc.h> 57#include <linux/falloc.h>
56#include <linux/fiemap.h> 58#include <linux/fiemap.h>
@@ -202,9 +204,8 @@ xfs_vn_mknod(
202{ 204{
203 struct inode *inode; 205 struct inode *inode;
204 struct xfs_inode *ip = NULL; 206 struct xfs_inode *ip = NULL;
205 xfs_acl_t *default_acl = NULL; 207 struct posix_acl *default_acl = NULL;
206 struct xfs_name name; 208 struct xfs_name name;
207 int (*test_default_acl)(struct inode *) = _ACL_DEFAULT_EXISTS;
208 int error; 209 int error;
209 210
210 /* 211 /*
@@ -219,18 +220,14 @@ xfs_vn_mknod(
219 rdev = 0; 220 rdev = 0;
220 } 221 }
221 222
222 if (test_default_acl && test_default_acl(dir)) { 223 if (IS_POSIXACL(dir)) {
223 if (!_ACL_ALLOC(default_acl)) { 224 default_acl = xfs_get_acl(dir, ACL_TYPE_DEFAULT);
224 return -ENOMEM; 225 if (IS_ERR(default_acl))
225 } 226 return -PTR_ERR(default_acl);
226 if (!_ACL_GET_DEFAULT(dir, default_acl)) {
227 _ACL_FREE(default_acl);
228 default_acl = NULL;
229 }
230 }
231 227
232 if (IS_POSIXACL(dir) && !default_acl) 228 if (!default_acl)
233 mode &= ~current->fs->umask; 229 mode &= ~current->fs->umask;
230 }
234 231
235 xfs_dentry_to_name(&name, dentry); 232 xfs_dentry_to_name(&name, dentry);
236 error = xfs_create(XFS_I(dir), &name, mode, rdev, &ip, NULL); 233 error = xfs_create(XFS_I(dir), &name, mode, rdev, &ip, NULL);
@@ -244,10 +241,10 @@ xfs_vn_mknod(
244 goto out_cleanup_inode; 241 goto out_cleanup_inode;
245 242
246 if (default_acl) { 243 if (default_acl) {
247 error = _ACL_INHERIT(inode, mode, default_acl); 244 error = -xfs_inherit_acl(inode, default_acl);
248 if (unlikely(error)) 245 if (unlikely(error))
249 goto out_cleanup_inode; 246 goto out_cleanup_inode;
250 _ACL_FREE(default_acl); 247 posix_acl_release(default_acl);
251 } 248 }
252 249
253 250
@@ -257,8 +254,7 @@ xfs_vn_mknod(
257 out_cleanup_inode: 254 out_cleanup_inode:
258 xfs_cleanup_inode(dir, inode, dentry); 255 xfs_cleanup_inode(dir, inode, dentry);
259 out_free_acl: 256 out_free_acl:
260 if (default_acl) 257 posix_acl_release(default_acl);
261 _ACL_FREE(default_acl);
262 return -error; 258 return -error;
263} 259}
264 260
@@ -488,26 +484,6 @@ xfs_vn_put_link(
488 kfree(s); 484 kfree(s);
489} 485}
490 486
491#ifdef CONFIG_XFS_POSIX_ACL
492STATIC int
493xfs_check_acl(
494 struct inode *inode,
495 int mask)
496{
497 struct xfs_inode *ip = XFS_I(inode);
498 int error;
499
500 xfs_itrace_entry(ip);
501
502 if (XFS_IFORK_Q(ip)) {
503 error = xfs_acl_iaccess(ip, mask, NULL);
504 if (error != -1)
505 return -error;
506 }
507
508 return -EAGAIN;
509}
510
511STATIC int 487STATIC int
512xfs_vn_permission( 488xfs_vn_permission(
513 struct inode *inode, 489 struct inode *inode,
@@ -515,9 +491,6 @@ xfs_vn_permission(
515{ 491{
516 return generic_permission(inode, mask, xfs_check_acl); 492 return generic_permission(inode, mask, xfs_check_acl);
517} 493}
518#else
519#define xfs_vn_permission NULL
520#endif
521 494
522STATIC int 495STATIC int
523xfs_vn_getattr( 496xfs_vn_getattr(
diff --git a/fs/xfs/linux-2.6/xfs_lrw.c b/fs/xfs/linux-2.6/xfs_lrw.c
index 9142192ccbe6..7078974a6eee 100644
--- a/fs/xfs/linux-2.6/xfs_lrw.c
+++ b/fs/xfs/linux-2.6/xfs_lrw.c
@@ -42,7 +42,6 @@
42#include "xfs_error.h" 42#include "xfs_error.h"
43#include "xfs_itable.h" 43#include "xfs_itable.h"
44#include "xfs_rw.h" 44#include "xfs_rw.h"
45#include "xfs_acl.h"
46#include "xfs_attr.h" 45#include "xfs_attr.h"
47#include "xfs_inode_item.h" 46#include "xfs_inode_item.h"
48#include "xfs_buf_item.h" 47#include "xfs_buf_item.h"
diff --git a/fs/xfs/linux-2.6/xfs_super.c b/fs/xfs/linux-2.6/xfs_super.c
index d4e7ef8f8df9..36fb8a657c55 100644
--- a/fs/xfs/linux-2.6/xfs_super.c
+++ b/fs/xfs/linux-2.6/xfs_super.c
@@ -43,7 +43,6 @@
43#include "xfs_itable.h" 43#include "xfs_itable.h"
44#include "xfs_fsops.h" 44#include "xfs_fsops.h"
45#include "xfs_rw.h" 45#include "xfs_rw.h"
46#include "xfs_acl.h"
47#include "xfs_attr.h" 46#include "xfs_attr.h"
48#include "xfs_buf_item.h" 47#include "xfs_buf_item.h"
49#include "xfs_utils.h" 48#include "xfs_utils.h"
@@ -1735,18 +1734,8 @@ xfs_init_zones(void)
1735 if (!xfs_ili_zone) 1734 if (!xfs_ili_zone)
1736 goto out_destroy_inode_zone; 1735 goto out_destroy_inode_zone;
1737 1736
1738#ifdef CONFIG_XFS_POSIX_ACL
1739 xfs_acl_zone = kmem_zone_init(sizeof(xfs_acl_t), "xfs_acl");
1740 if (!xfs_acl_zone)
1741 goto out_destroy_ili_zone;
1742#endif
1743
1744 return 0; 1737 return 0;
1745 1738
1746#ifdef CONFIG_XFS_POSIX_ACL
1747 out_destroy_ili_zone:
1748#endif
1749 kmem_zone_destroy(xfs_ili_zone);
1750 out_destroy_inode_zone: 1739 out_destroy_inode_zone:
1751 kmem_zone_destroy(xfs_inode_zone); 1740 kmem_zone_destroy(xfs_inode_zone);
1752 out_destroy_efi_zone: 1741 out_destroy_efi_zone:
@@ -1780,9 +1769,6 @@ xfs_init_zones(void)
1780STATIC void 1769STATIC void
1781xfs_destroy_zones(void) 1770xfs_destroy_zones(void)
1782{ 1771{
1783#ifdef CONFIG_XFS_POSIX_ACL
1784 kmem_zone_destroy(xfs_acl_zone);
1785#endif
1786 kmem_zone_destroy(xfs_ili_zone); 1772 kmem_zone_destroy(xfs_ili_zone);
1787 kmem_zone_destroy(xfs_inode_zone); 1773 kmem_zone_destroy(xfs_inode_zone);
1788 kmem_zone_destroy(xfs_efi_zone); 1774 kmem_zone_destroy(xfs_efi_zone);
diff --git a/fs/xfs/linux-2.6/xfs_xattr.c b/fs/xfs/linux-2.6/xfs_xattr.c
index 964621fde6ed..497c7fb75cc1 100644
--- a/fs/xfs/linux-2.6/xfs_xattr.c
+++ b/fs/xfs/linux-2.6/xfs_xattr.c
@@ -29,67 +29,6 @@
29#include <linux/xattr.h> 29#include <linux/xattr.h>
30 30
31 31
32/*
33 * ACL handling. Should eventually be moved into xfs_acl.c
34 */
35
36static int
37xfs_decode_acl(const char *name)
38{
39 if (strcmp(name, "posix_acl_access") == 0)
40 return _ACL_TYPE_ACCESS;
41 else if (strcmp(name, "posix_acl_default") == 0)
42 return _ACL_TYPE_DEFAULT;
43 return -EINVAL;
44}
45
46/*
47 * Get system extended attributes which at the moment only
48 * includes Posix ACLs.
49 */
50static int
51xfs_xattr_system_get(struct inode *inode, const char *name,
52 void *buffer, size_t size)
53{
54 int acl;
55
56 acl = xfs_decode_acl(name);
57 if (acl < 0)
58 return acl;
59
60 return xfs_acl_vget(inode, buffer, size, acl);
61}
62
63static int
64xfs_xattr_system_set(struct inode *inode, const char *name,
65 const void *value, size_t size, int flags)
66{
67 int acl;
68
69 acl = xfs_decode_acl(name);
70 if (acl < 0)
71 return acl;
72 if (flags & XATTR_CREATE)
73 return -EINVAL;
74
75 if (!value)
76 return xfs_acl_vremove(inode, acl);
77
78 return xfs_acl_vset(inode, (void *)value, size, acl);
79}
80
81static struct xattr_handler xfs_xattr_system_handler = {
82 .prefix = XATTR_SYSTEM_PREFIX,
83 .get = xfs_xattr_system_get,
84 .set = xfs_xattr_system_set,
85};
86
87
88/*
89 * Real xattr handling. The only difference between the namespaces is
90 * a flag passed to the low-level attr code.
91 */
92
93static int 32static int
94__xfs_xattr_get(struct inode *inode, const char *name, 33__xfs_xattr_get(struct inode *inode, const char *name,
95 void *value, size_t size, int xflags) 34 void *value, size_t size, int xflags)
@@ -199,7 +138,9 @@ struct xattr_handler *xfs_xattr_handlers[] = {
199 &xfs_xattr_user_handler, 138 &xfs_xattr_user_handler,
200 &xfs_xattr_trusted_handler, 139 &xfs_xattr_trusted_handler,
201 &xfs_xattr_security_handler, 140 &xfs_xattr_security_handler,
141#ifdef CONFIG_XFS_POSIX_ACL
202 &xfs_xattr_system_handler, 142 &xfs_xattr_system_handler,
143#endif
203 NULL 144 NULL
204}; 145};
205 146
@@ -310,7 +251,7 @@ xfs_vn_listxattr(struct dentry *dentry, char *data, size_t size)
310 /* 251 /*
311 * Then add the two synthetic ACL attributes. 252 * Then add the two synthetic ACL attributes.
312 */ 253 */
313 if (xfs_acl_vhasacl_access(inode)) { 254 if (posix_acl_access_exists(inode)) {
314 error = list_one_attr(POSIX_ACL_XATTR_ACCESS, 255 error = list_one_attr(POSIX_ACL_XATTR_ACCESS,
315 strlen(POSIX_ACL_XATTR_ACCESS) + 1, 256 strlen(POSIX_ACL_XATTR_ACCESS) + 1,
316 data, size, &context.count); 257 data, size, &context.count);
@@ -318,7 +259,7 @@ xfs_vn_listxattr(struct dentry *dentry, char *data, size_t size)
318 return error; 259 return error;
319 } 260 }
320 261
321 if (xfs_acl_vhasacl_default(inode)) { 262 if (posix_acl_default_exists(inode)) {
322 error = list_one_attr(POSIX_ACL_XATTR_DEFAULT, 263 error = list_one_attr(POSIX_ACL_XATTR_DEFAULT,
323 strlen(POSIX_ACL_XATTR_DEFAULT) + 1, 264 strlen(POSIX_ACL_XATTR_DEFAULT) + 1,
324 data, size, &context.count); 265 data, size, &context.count);
diff --git a/fs/xfs/quota/xfs_dquot.c b/fs/xfs/quota/xfs_dquot.c
index 4d6d051ee56e..2f3f2229eaaf 100644
--- a/fs/xfs/quota/xfs_dquot.c
+++ b/fs/xfs/quota/xfs_dquot.c
@@ -42,7 +42,6 @@
42#include "xfs_error.h" 42#include "xfs_error.h"
43#include "xfs_itable.h" 43#include "xfs_itable.h"
44#include "xfs_rw.h" 44#include "xfs_rw.h"
45#include "xfs_acl.h"
46#include "xfs_attr.h" 45#include "xfs_attr.h"
47#include "xfs_buf_item.h" 46#include "xfs_buf_item.h"
48#include "xfs_trans_space.h" 47#include "xfs_trans_space.h"
diff --git a/fs/xfs/quota/xfs_dquot_item.c b/fs/xfs/quota/xfs_dquot_item.c
index 1728f6a7c4f5..d0d4a9a0bbd7 100644
--- a/fs/xfs/quota/xfs_dquot_item.c
+++ b/fs/xfs/quota/xfs_dquot_item.c
@@ -42,7 +42,6 @@
42#include "xfs_error.h" 42#include "xfs_error.h"
43#include "xfs_itable.h" 43#include "xfs_itable.h"
44#include "xfs_rw.h" 44#include "xfs_rw.h"
45#include "xfs_acl.h"
46#include "xfs_attr.h" 45#include "xfs_attr.h"
47#include "xfs_buf_item.h" 46#include "xfs_buf_item.h"
48#include "xfs_trans_priv.h" 47#include "xfs_trans_priv.h"
diff --git a/fs/xfs/quota/xfs_qm.c b/fs/xfs/quota/xfs_qm.c
index 22b7c8d364e8..45b1bfef7388 100644
--- a/fs/xfs/quota/xfs_qm.c
+++ b/fs/xfs/quota/xfs_qm.c
@@ -42,7 +42,6 @@
42#include "xfs_error.h" 42#include "xfs_error.h"
43#include "xfs_bmap.h" 43#include "xfs_bmap.h"
44#include "xfs_rw.h" 44#include "xfs_rw.h"
45#include "xfs_acl.h"
46#include "xfs_attr.h" 45#include "xfs_attr.h"
47#include "xfs_buf_item.h" 46#include "xfs_buf_item.h"
48#include "xfs_trans_space.h" 47#include "xfs_trans_space.h"
diff --git a/fs/xfs/quota/xfs_qm_bhv.c b/fs/xfs/quota/xfs_qm_bhv.c
index 56a5965f3c8b..a5346630dfae 100644
--- a/fs/xfs/quota/xfs_qm_bhv.c
+++ b/fs/xfs/quota/xfs_qm_bhv.c
@@ -42,7 +42,6 @@
42#include "xfs_rtalloc.h" 42#include "xfs_rtalloc.h"
43#include "xfs_error.h" 43#include "xfs_error.h"
44#include "xfs_rw.h" 44#include "xfs_rw.h"
45#include "xfs_acl.h"
46#include "xfs_attr.h" 45#include "xfs_attr.h"
47#include "xfs_buf_item.h" 46#include "xfs_buf_item.h"
48#include "xfs_qm.h" 47#include "xfs_qm.h"
diff --git a/fs/xfs/quota/xfs_qm_stats.c b/fs/xfs/quota/xfs_qm_stats.c
index 709f5f545cf5..21b08c0396a1 100644
--- a/fs/xfs/quota/xfs_qm_stats.c
+++ b/fs/xfs/quota/xfs_qm_stats.c
@@ -42,7 +42,6 @@
42#include "xfs_rtalloc.h" 42#include "xfs_rtalloc.h"
43#include "xfs_error.h" 43#include "xfs_error.h"
44#include "xfs_rw.h" 44#include "xfs_rw.h"
45#include "xfs_acl.h"
46#include "xfs_attr.h" 45#include "xfs_attr.h"
47#include "xfs_buf_item.h" 46#include "xfs_buf_item.h"
48#include "xfs_qm.h" 47#include "xfs_qm.h"
diff --git a/fs/xfs/quota/xfs_qm_syscalls.c b/fs/xfs/quota/xfs_qm_syscalls.c
index 7126f855e14b..4e4276b956e8 100644
--- a/fs/xfs/quota/xfs_qm_syscalls.c
+++ b/fs/xfs/quota/xfs_qm_syscalls.c
@@ -45,7 +45,6 @@
45#include "xfs_rtalloc.h" 45#include "xfs_rtalloc.h"
46#include "xfs_error.h" 46#include "xfs_error.h"
47#include "xfs_rw.h" 47#include "xfs_rw.h"
48#include "xfs_acl.h"
49#include "xfs_attr.h" 48#include "xfs_attr.h"
50#include "xfs_buf_item.h" 49#include "xfs_buf_item.h"
51#include "xfs_utils.h" 50#include "xfs_utils.h"
diff --git a/fs/xfs/quota/xfs_trans_dquot.c b/fs/xfs/quota/xfs_trans_dquot.c
index eafa7ab34085..97ac9640be98 100644
--- a/fs/xfs/quota/xfs_trans_dquot.c
+++ b/fs/xfs/quota/xfs_trans_dquot.c
@@ -42,7 +42,6 @@
42#include "xfs_rtalloc.h" 42#include "xfs_rtalloc.h"
43#include "xfs_error.h" 43#include "xfs_error.h"
44#include "xfs_rw.h" 44#include "xfs_rw.h"
45#include "xfs_acl.h"
46#include "xfs_attr.h" 45#include "xfs_attr.h"
47#include "xfs_buf_item.h" 46#include "xfs_buf_item.h"
48#include "xfs_trans_priv.h" 47#include "xfs_trans_priv.h"
diff --git a/fs/xfs/xfs_acl.c b/fs/xfs/xfs_acl.c
deleted file mode 100644
index a8cdd73999a4..000000000000
--- a/fs/xfs/xfs_acl.c
+++ /dev/null
@@ -1,874 +0,0 @@
1/*
2 * Copyright (c) 2001-2002,2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18#include "xfs.h"
19#include "xfs_fs.h"
20#include "xfs_types.h"
21#include "xfs_bit.h"
22#include "xfs_inum.h"
23#include "xfs_ag.h"
24#include "xfs_dir2.h"
25#include "xfs_bmap_btree.h"
26#include "xfs_alloc_btree.h"
27#include "xfs_ialloc_btree.h"
28#include "xfs_dir2_sf.h"
29#include "xfs_attr_sf.h"
30#include "xfs_dinode.h"
31#include "xfs_inode.h"
32#include "xfs_btree.h"
33#include "xfs_acl.h"
34#include "xfs_attr.h"
35#include "xfs_vnodeops.h"
36
37#include <linux/capability.h>
38#include <linux/posix_acl_xattr.h>
39
40STATIC int xfs_acl_setmode(struct inode *, xfs_acl_t *, int *);
41STATIC void xfs_acl_filter_mode(mode_t, xfs_acl_t *);
42STATIC void xfs_acl_get_endian(xfs_acl_t *);
43STATIC int xfs_acl_access(uid_t, gid_t, xfs_acl_t *, mode_t, cred_t *);
44STATIC int xfs_acl_invalid(xfs_acl_t *);
45STATIC void xfs_acl_sync_mode(mode_t, xfs_acl_t *);
46STATIC void xfs_acl_get_attr(struct inode *, xfs_acl_t *, int, int, int *);
47STATIC void xfs_acl_set_attr(struct inode *, xfs_acl_t *, int, int *);
48STATIC int xfs_acl_allow_set(struct inode *, int);
49
50kmem_zone_t *xfs_acl_zone;
51
52
53/*
54 * Test for existence of access ACL attribute as efficiently as possible.
55 */
56int
57xfs_acl_vhasacl_access(
58 struct inode *vp)
59{
60 int error;
61
62 xfs_acl_get_attr(vp, NULL, _ACL_TYPE_ACCESS, ATTR_KERNOVAL, &error);
63 return (error == 0);
64}
65
66/*
67 * Test for existence of default ACL attribute as efficiently as possible.
68 */
69int
70xfs_acl_vhasacl_default(
71 struct inode *vp)
72{
73 int error;
74
75 if (!S_ISDIR(vp->i_mode))
76 return 0;
77 xfs_acl_get_attr(vp, NULL, _ACL_TYPE_DEFAULT, ATTR_KERNOVAL, &error);
78 return (error == 0);
79}
80
81/*
82 * Convert from extended attribute representation to in-memory for XFS.
83 */
84STATIC int
85posix_acl_xattr_to_xfs(
86 posix_acl_xattr_header *src,
87 size_t size,
88 xfs_acl_t *dest)
89{
90 posix_acl_xattr_entry *src_entry;
91 xfs_acl_entry_t *dest_entry;
92 int n;
93
94 if (!src || !dest)
95 return EINVAL;
96
97 if (size < sizeof(posix_acl_xattr_header))
98 return EINVAL;
99
100 if (src->a_version != cpu_to_le32(POSIX_ACL_XATTR_VERSION))
101 return EOPNOTSUPP;
102
103 memset(dest, 0, sizeof(xfs_acl_t));
104 dest->acl_cnt = posix_acl_xattr_count(size);
105 if (dest->acl_cnt < 0 || dest->acl_cnt > XFS_ACL_MAX_ENTRIES)
106 return EINVAL;
107
108 /*
109 * acl_set_file(3) may request that we set default ACLs with
110 * zero length -- defend (gracefully) against that here.
111 */
112 if (!dest->acl_cnt)
113 return 0;
114
115 src_entry = (posix_acl_xattr_entry *)((char *)src + sizeof(*src));
116 dest_entry = &dest->acl_entry[0];
117
118 for (n = 0; n < dest->acl_cnt; n++, src_entry++, dest_entry++) {
119 dest_entry->ae_perm = le16_to_cpu(src_entry->e_perm);
120 if (_ACL_PERM_INVALID(dest_entry->ae_perm))
121 return EINVAL;
122 dest_entry->ae_tag = le16_to_cpu(src_entry->e_tag);
123 switch(dest_entry->ae_tag) {
124 case ACL_USER:
125 case ACL_GROUP:
126 dest_entry->ae_id = le32_to_cpu(src_entry->e_id);
127 break;
128 case ACL_USER_OBJ:
129 case ACL_GROUP_OBJ:
130 case ACL_MASK:
131 case ACL_OTHER:
132 dest_entry->ae_id = ACL_UNDEFINED_ID;
133 break;
134 default:
135 return EINVAL;
136 }
137 }
138 if (xfs_acl_invalid(dest))
139 return EINVAL;
140
141 return 0;
142}
143
144/*
145 * Comparison function called from xfs_sort().
146 * Primary key is ae_tag, secondary key is ae_id.
147 */
148STATIC int
149xfs_acl_entry_compare(
150 const void *va,
151 const void *vb)
152{
153 xfs_acl_entry_t *a = (xfs_acl_entry_t *)va,
154 *b = (xfs_acl_entry_t *)vb;
155
156 if (a->ae_tag == b->ae_tag)
157 return (a->ae_id - b->ae_id);
158 return (a->ae_tag - b->ae_tag);
159}
160
161/*
162 * Convert from in-memory XFS to extended attribute representation.
163 */
164STATIC int
165posix_acl_xfs_to_xattr(
166 xfs_acl_t *src,
167 posix_acl_xattr_header *dest,
168 size_t size)
169{
170 int n;
171 size_t new_size = posix_acl_xattr_size(src->acl_cnt);
172 posix_acl_xattr_entry *dest_entry;
173 xfs_acl_entry_t *src_entry;
174
175 if (size < new_size)
176 return -ERANGE;
177
178 /* Need to sort src XFS ACL by <ae_tag,ae_id> */
179 xfs_sort(src->acl_entry, src->acl_cnt, sizeof(src->acl_entry[0]),
180 xfs_acl_entry_compare);
181
182 dest->a_version = cpu_to_le32(POSIX_ACL_XATTR_VERSION);
183 dest_entry = &dest->a_entries[0];
184 src_entry = &src->acl_entry[0];
185 for (n = 0; n < src->acl_cnt; n++, dest_entry++, src_entry++) {
186 dest_entry->e_perm = cpu_to_le16(src_entry->ae_perm);
187 if (_ACL_PERM_INVALID(src_entry->ae_perm))
188 return -EINVAL;
189 dest_entry->e_tag = cpu_to_le16(src_entry->ae_tag);
190 switch (src_entry->ae_tag) {
191 case ACL_USER:
192 case ACL_GROUP:
193 dest_entry->e_id = cpu_to_le32(src_entry->ae_id);
194 break;
195 case ACL_USER_OBJ:
196 case ACL_GROUP_OBJ:
197 case ACL_MASK:
198 case ACL_OTHER:
199 dest_entry->e_id = cpu_to_le32(ACL_UNDEFINED_ID);
200 break;
201 default:
202 return -EINVAL;
203 }
204 }
205 return new_size;
206}
207
208int
209xfs_acl_vget(
210 struct inode *vp,
211 void *acl,
212 size_t size,
213 int kind)
214{
215 int error;
216 xfs_acl_t *xfs_acl = NULL;
217 posix_acl_xattr_header *ext_acl = acl;
218 int flags = 0;
219
220 if(size) {
221 if (!(_ACL_ALLOC(xfs_acl))) {
222 error = ENOMEM;
223 goto out;
224 }
225 memset(xfs_acl, 0, sizeof(xfs_acl_t));
226 } else
227 flags = ATTR_KERNOVAL;
228
229 xfs_acl_get_attr(vp, xfs_acl, kind, flags, &error);
230 if (error)
231 goto out;
232
233 if (!size) {
234 error = -posix_acl_xattr_size(XFS_ACL_MAX_ENTRIES);
235 } else {
236 if (xfs_acl_invalid(xfs_acl)) {
237 error = EINVAL;
238 goto out;
239 }
240 if (kind == _ACL_TYPE_ACCESS)
241 xfs_acl_sync_mode(XFS_I(vp)->i_d.di_mode, xfs_acl);
242 error = -posix_acl_xfs_to_xattr(xfs_acl, ext_acl, size);
243 }
244out:
245 if(xfs_acl)
246 _ACL_FREE(xfs_acl);
247 return -error;
248}
249
250int
251xfs_acl_vremove(
252 struct inode *vp,
253 int kind)
254{
255 int error;
256
257 error = xfs_acl_allow_set(vp, kind);
258 if (!error) {
259 error = xfs_attr_remove(XFS_I(vp),
260 kind == _ACL_TYPE_DEFAULT?
261 SGI_ACL_DEFAULT: SGI_ACL_FILE,
262 ATTR_ROOT);
263 if (error == ENOATTR)
264 error = 0; /* 'scool */
265 }
266 return -error;
267}
268
269int
270xfs_acl_vset(
271 struct inode *vp,
272 void *acl,
273 size_t size,
274 int kind)
275{
276 posix_acl_xattr_header *ext_acl = acl;
277 xfs_acl_t *xfs_acl;
278 int error;
279 int basicperms = 0; /* more than std unix perms? */
280
281 if (!acl)
282 return -EINVAL;
283
284 if (!(_ACL_ALLOC(xfs_acl)))
285 return -ENOMEM;
286
287 error = posix_acl_xattr_to_xfs(ext_acl, size, xfs_acl);
288 if (error) {
289 _ACL_FREE(xfs_acl);
290 return -error;
291 }
292 if (!xfs_acl->acl_cnt) {
293 _ACL_FREE(xfs_acl);
294 return 0;
295 }
296
297 error = xfs_acl_allow_set(vp, kind);
298
299 /* Incoming ACL exists, set file mode based on its value */
300 if (!error && kind == _ACL_TYPE_ACCESS)
301 error = xfs_acl_setmode(vp, xfs_acl, &basicperms);
302
303 if (error)
304 goto out;
305
306 /*
307 * If we have more than std unix permissions, set up the actual attr.
308 * Otherwise, delete any existing attr. This prevents us from
309 * having actual attrs for permissions that can be stored in the
310 * standard permission bits.
311 */
312 if (!basicperms) {
313 xfs_acl_set_attr(vp, xfs_acl, kind, &error);
314 } else {
315 error = -xfs_acl_vremove(vp, _ACL_TYPE_ACCESS);
316 }
317
318out:
319 _ACL_FREE(xfs_acl);
320 return -error;
321}
322
323int
324xfs_acl_iaccess(
325 xfs_inode_t *ip,
326 mode_t mode,
327 cred_t *cr)
328{
329 xfs_acl_t *acl;
330 int rval;
331 struct xfs_name acl_name = {SGI_ACL_FILE, SGI_ACL_FILE_SIZE};
332
333 if (!(_ACL_ALLOC(acl)))
334 return -1;
335
336 /* If the file has no ACL return -1. */
337 rval = sizeof(xfs_acl_t);
338 if (xfs_attr_fetch(ip, &acl_name, (char *)acl, &rval, ATTR_ROOT)) {
339 _ACL_FREE(acl);
340 return -1;
341 }
342 xfs_acl_get_endian(acl);
343
344 /* If the file has an empty ACL return -1. */
345 if (acl->acl_cnt == XFS_ACL_NOT_PRESENT) {
346 _ACL_FREE(acl);
347 return -1;
348 }
349
350 /* Synchronize ACL with mode bits */
351 xfs_acl_sync_mode(ip->i_d.di_mode, acl);
352
353 rval = xfs_acl_access(ip->i_d.di_uid, ip->i_d.di_gid, acl, mode, cr);
354 _ACL_FREE(acl);
355 return rval;
356}
357
358STATIC int
359xfs_acl_allow_set(
360 struct inode *vp,
361 int kind)
362{
363 if (vp->i_flags & (S_IMMUTABLE|S_APPEND))
364 return EPERM;
365 if (kind == _ACL_TYPE_DEFAULT && !S_ISDIR(vp->i_mode))
366 return ENOTDIR;
367 if (vp->i_sb->s_flags & MS_RDONLY)
368 return EROFS;
369 if (XFS_I(vp)->i_d.di_uid != current_fsuid() && !capable(CAP_FOWNER))
370 return EPERM;
371 return 0;
372}
373
374/*
375 * Note: cr is only used here for the capability check if the ACL test fails.
376 * It is not used to find out the credentials uid or groups etc, as was
377 * done in IRIX. It is assumed that the uid and groups for the current
378 * thread are taken from "current" instead of the cr parameter.
379 */
380STATIC int
381xfs_acl_access(
382 uid_t fuid,
383 gid_t fgid,
384 xfs_acl_t *fap,
385 mode_t md,
386 cred_t *cr)
387{
388 xfs_acl_entry_t matched;
389 int i, allows;
390 int maskallows = -1; /* true, but not 1, either */
391 int seen_userobj = 0;
392
393 matched.ae_tag = 0; /* Invalid type */
394 matched.ae_perm = 0;
395
396 for (i = 0; i < fap->acl_cnt; i++) {
397 /*
398 * Break out if we've got a user_obj entry or
399 * a user entry and the mask (and have processed USER_OBJ)
400 */
401 if (matched.ae_tag == ACL_USER_OBJ)
402 break;
403 if (matched.ae_tag == ACL_USER) {
404 if (maskallows != -1 && seen_userobj)
405 break;
406 if (fap->acl_entry[i].ae_tag != ACL_MASK &&
407 fap->acl_entry[i].ae_tag != ACL_USER_OBJ)
408 continue;
409 }
410 /* True if this entry allows the requested access */
411 allows = ((fap->acl_entry[i].ae_perm & md) == md);
412
413 switch (fap->acl_entry[i].ae_tag) {
414 case ACL_USER_OBJ:
415 seen_userobj = 1;
416 if (fuid != current_fsuid())
417 continue;
418 matched.ae_tag = ACL_USER_OBJ;
419 matched.ae_perm = allows;
420 break;
421 case ACL_USER:
422 if (fap->acl_entry[i].ae_id != current_fsuid())
423 continue;
424 matched.ae_tag = ACL_USER;
425 matched.ae_perm = allows;
426 break;
427 case ACL_GROUP_OBJ:
428 if ((matched.ae_tag == ACL_GROUP_OBJ ||
429 matched.ae_tag == ACL_GROUP) && !allows)
430 continue;
431 if (!in_group_p(fgid))
432 continue;
433 matched.ae_tag = ACL_GROUP_OBJ;
434 matched.ae_perm = allows;
435 break;
436 case ACL_GROUP:
437 if ((matched.ae_tag == ACL_GROUP_OBJ ||
438 matched.ae_tag == ACL_GROUP) && !allows)
439 continue;
440 if (!in_group_p(fap->acl_entry[i].ae_id))
441 continue;
442 matched.ae_tag = ACL_GROUP;
443 matched.ae_perm = allows;
444 break;
445 case ACL_MASK:
446 maskallows = allows;
447 break;
448 case ACL_OTHER:
449 if (matched.ae_tag != 0)
450 continue;
451 matched.ae_tag = ACL_OTHER;
452 matched.ae_perm = allows;
453 break;
454 }
455 }
456 /*
457 * First possibility is that no matched entry allows access.
458 * The capability to override DAC may exist, so check for it.
459 */
460 switch (matched.ae_tag) {
461 case ACL_OTHER:
462 case ACL_USER_OBJ:
463 if (matched.ae_perm)
464 return 0;
465 break;
466 case ACL_USER:
467 case ACL_GROUP_OBJ:
468 case ACL_GROUP:
469 if (maskallows && matched.ae_perm)
470 return 0;
471 break;
472 case 0:
473 break;
474 }
475
476 /* EACCES tells generic_permission to check for capability overrides */
477 return EACCES;
478}
479
480/*
481 * ACL validity checker.
482 * This acl validation routine checks each ACL entry read in makes sense.
483 */
484STATIC int
485xfs_acl_invalid(
486 xfs_acl_t *aclp)
487{
488 xfs_acl_entry_t *entry, *e;
489 int user = 0, group = 0, other = 0, mask = 0;
490 int mask_required = 0;
491 int i, j;
492
493 if (!aclp)
494 goto acl_invalid;
495
496 if (aclp->acl_cnt > XFS_ACL_MAX_ENTRIES)
497 goto acl_invalid;
498
499 for (i = 0; i < aclp->acl_cnt; i++) {
500 entry = &aclp->acl_entry[i];
501 switch (entry->ae_tag) {
502 case ACL_USER_OBJ:
503 if (user++)
504 goto acl_invalid;
505 break;
506 case ACL_GROUP_OBJ:
507 if (group++)
508 goto acl_invalid;
509 break;
510 case ACL_OTHER:
511 if (other++)
512 goto acl_invalid;
513 break;
514 case ACL_USER:
515 case ACL_GROUP:
516 for (j = i + 1; j < aclp->acl_cnt; j++) {
517 e = &aclp->acl_entry[j];
518 if (e->ae_id == entry->ae_id &&
519 e->ae_tag == entry->ae_tag)
520 goto acl_invalid;
521 }
522 mask_required++;
523 break;
524 case ACL_MASK:
525 if (mask++)
526 goto acl_invalid;
527 break;
528 default:
529 goto acl_invalid;
530 }
531 }
532 if (!user || !group || !other || (mask_required && !mask))
533 goto acl_invalid;
534 else
535 return 0;
536acl_invalid:
537 return EINVAL;
538}
539
540/*
541 * Do ACL endian conversion.
542 */
543STATIC void
544xfs_acl_get_endian(
545 xfs_acl_t *aclp)
546{
547 xfs_acl_entry_t *ace, *end;
548
549 INT_SET(aclp->acl_cnt, ARCH_CONVERT, aclp->acl_cnt);
550 end = &aclp->acl_entry[0]+aclp->acl_cnt;
551 for (ace = &aclp->acl_entry[0]; ace < end; ace++) {
552 INT_SET(ace->ae_tag, ARCH_CONVERT, ace->ae_tag);
553 INT_SET(ace->ae_id, ARCH_CONVERT, ace->ae_id);
554 INT_SET(ace->ae_perm, ARCH_CONVERT, ace->ae_perm);
555 }
556}
557
558/*
559 * Get the ACL from the EA and do endian conversion.
560 */
561STATIC void
562xfs_acl_get_attr(
563 struct inode *vp,
564 xfs_acl_t *aclp,
565 int kind,
566 int flags,
567 int *error)
568{
569 int len = sizeof(xfs_acl_t);
570
571 ASSERT((flags & ATTR_KERNOVAL) ? (aclp == NULL) : 1);
572 flags |= ATTR_ROOT;
573 *error = xfs_attr_get(XFS_I(vp),
574 kind == _ACL_TYPE_ACCESS ?
575 SGI_ACL_FILE : SGI_ACL_DEFAULT,
576 (char *)aclp, &len, flags);
577 if (*error || (flags & ATTR_KERNOVAL))
578 return;
579 xfs_acl_get_endian(aclp);
580}
581
582/*
583 * Set the EA with the ACL and do endian conversion.
584 */
585STATIC void
586xfs_acl_set_attr(
587 struct inode *vp,
588 xfs_acl_t *aclp,
589 int kind,
590 int *error)
591{
592 xfs_acl_entry_t *ace, *newace, *end;
593 xfs_acl_t *newacl;
594 int len;
595
596 if (!(_ACL_ALLOC(newacl))) {
597 *error = ENOMEM;
598 return;
599 }
600
601 len = sizeof(xfs_acl_t) -
602 (sizeof(xfs_acl_entry_t) * (XFS_ACL_MAX_ENTRIES - aclp->acl_cnt));
603 end = &aclp->acl_entry[0]+aclp->acl_cnt;
604 for (ace = &aclp->acl_entry[0], newace = &newacl->acl_entry[0];
605 ace < end;
606 ace++, newace++) {
607 INT_SET(newace->ae_tag, ARCH_CONVERT, ace->ae_tag);
608 INT_SET(newace->ae_id, ARCH_CONVERT, ace->ae_id);
609 INT_SET(newace->ae_perm, ARCH_CONVERT, ace->ae_perm);
610 }
611 INT_SET(newacl->acl_cnt, ARCH_CONVERT, aclp->acl_cnt);
612 *error = xfs_attr_set(XFS_I(vp),
613 kind == _ACL_TYPE_ACCESS ?
614 SGI_ACL_FILE: SGI_ACL_DEFAULT,
615 (char *)newacl, len, ATTR_ROOT);
616 _ACL_FREE(newacl);
617}
618
619int
620xfs_acl_vtoacl(
621 struct inode *vp,
622 xfs_acl_t *access_acl,
623 xfs_acl_t *default_acl)
624{
625 int error = 0;
626
627 if (access_acl) {
628 /*
629 * Get the Access ACL and the mode. If either cannot
630 * be obtained for some reason, invalidate the access ACL.
631 */
632 xfs_acl_get_attr(vp, access_acl, _ACL_TYPE_ACCESS, 0, &error);
633 if (error)
634 access_acl->acl_cnt = XFS_ACL_NOT_PRESENT;
635 else /* We have a good ACL and the file mode, synchronize. */
636 xfs_acl_sync_mode(XFS_I(vp)->i_d.di_mode, access_acl);
637 }
638
639 if (default_acl) {
640 xfs_acl_get_attr(vp, default_acl, _ACL_TYPE_DEFAULT, 0, &error);
641 if (error)
642 default_acl->acl_cnt = XFS_ACL_NOT_PRESENT;
643 }
644 return error;
645}
646
647/*
648 * This function retrieves the parent directory's acl, processes it
649 * and lets the child inherit the acl(s) that it should.
650 */
651int
652xfs_acl_inherit(
653 struct inode *vp,
654 mode_t mode,
655 xfs_acl_t *pdaclp)
656{
657 xfs_acl_t *cacl;
658 int error = 0;
659 int basicperms = 0;
660
661 /*
662 * If the parent does not have a default ACL, or it's an
663 * invalid ACL, we're done.
664 */
665 if (!vp)
666 return 0;
667 if (!pdaclp || xfs_acl_invalid(pdaclp))
668 return 0;
669
670 /*
671 * Copy the default ACL of the containing directory to
672 * the access ACL of the new file and use the mode that
673 * was passed in to set up the correct initial values for
674 * the u::,g::[m::], and o:: entries. This is what makes
675 * umask() "work" with ACL's.
676 */
677
678 if (!(_ACL_ALLOC(cacl)))
679 return ENOMEM;
680
681 memcpy(cacl, pdaclp, sizeof(xfs_acl_t));
682 xfs_acl_filter_mode(mode, cacl);
683 error = xfs_acl_setmode(vp, cacl, &basicperms);
684 if (error)
685 goto out_error;
686
687 /*
688 * Set the Default and Access ACL on the file. The mode is already
689 * set on the file, so we don't need to worry about that.
690 *
691 * If the new file is a directory, its default ACL is a copy of
692 * the containing directory's default ACL.
693 */
694 if (S_ISDIR(vp->i_mode))
695 xfs_acl_set_attr(vp, pdaclp, _ACL_TYPE_DEFAULT, &error);
696 if (!error && !basicperms)
697 xfs_acl_set_attr(vp, cacl, _ACL_TYPE_ACCESS, &error);
698out_error:
699 _ACL_FREE(cacl);
700 return error;
701}
702
703/*
704 * Set up the correct mode on the file based on the supplied ACL. This
705 * makes sure that the mode on the file reflects the state of the
706 * u::,g::[m::], and o:: entries in the ACL. Since the mode is where
707 * the ACL is going to get the permissions for these entries, we must
708 * synchronize the mode whenever we set the ACL on a file.
709 */
710STATIC int
711xfs_acl_setmode(
712 struct inode *vp,
713 xfs_acl_t *acl,
714 int *basicperms)
715{
716 struct iattr iattr;
717 xfs_acl_entry_t *ap;
718 xfs_acl_entry_t *gap = NULL;
719 int i, nomask = 1;
720
721 *basicperms = 1;
722
723 if (acl->acl_cnt == XFS_ACL_NOT_PRESENT)
724 return 0;
725
726 /*
727 * Copy the u::, g::, o::, and m:: bits from the ACL into the
728 * mode. The m:: bits take precedence over the g:: bits.
729 */
730 iattr.ia_valid = ATTR_MODE;
731 iattr.ia_mode = XFS_I(vp)->i_d.di_mode;
732 iattr.ia_mode &= ~(S_IRWXU|S_IRWXG|S_IRWXO);
733 ap = acl->acl_entry;
734 for (i = 0; i < acl->acl_cnt; ++i) {
735 switch (ap->ae_tag) {
736 case ACL_USER_OBJ:
737 iattr.ia_mode |= ap->ae_perm << 6;
738 break;
739 case ACL_GROUP_OBJ:
740 gap = ap;
741 break;
742 case ACL_MASK: /* more than just standard modes */
743 nomask = 0;
744 iattr.ia_mode |= ap->ae_perm << 3;
745 *basicperms = 0;
746 break;
747 case ACL_OTHER:
748 iattr.ia_mode |= ap->ae_perm;
749 break;
750 default: /* more than just standard modes */
751 *basicperms = 0;
752 break;
753 }
754 ap++;
755 }
756
757 /* Set the group bits from ACL_GROUP_OBJ if there's no ACL_MASK */
758 if (gap && nomask)
759 iattr.ia_mode |= gap->ae_perm << 3;
760
761 return xfs_setattr(XFS_I(vp), &iattr, 0);
762}
763
764/*
765 * The permissions for the special ACL entries (u::, g::[m::], o::) are
766 * actually stored in the file mode (if there is both a group and a mask,
767 * the group is stored in the ACL entry and the mask is stored on the file).
768 * This allows the mode to remain automatically in sync with the ACL without
769 * the need for a call-back to the ACL system at every point where the mode
770 * could change. This function takes the permissions from the specified mode
771 * and places it in the supplied ACL.
772 *
773 * This implementation draws its validity from the fact that, when the ACL
774 * was assigned, the mode was copied from the ACL.
775 * If the mode did not change, therefore, the mode remains exactly what was
776 * taken from the special ACL entries at assignment.
777 * If a subsequent chmod() was done, the POSIX spec says that the change in
778 * mode must cause an update to the ACL seen at user level and used for
779 * access checks. Before and after a mode change, therefore, the file mode
780 * most accurately reflects what the special ACL entries should permit/deny.
781 *
782 * CAVEAT: If someone sets the SGI_ACL_FILE attribute directly,
783 * the existing mode bits will override whatever is in the
784 * ACL. Similarly, if there is a pre-existing ACL that was
785 * never in sync with its mode (owing to a bug in 6.5 and
786 * before), it will now magically (or mystically) be
787 * synchronized. This could cause slight astonishment, but
788 * it is better than inconsistent permissions.
789 *
790 * The supplied ACL is a template that may contain any combination
791 * of special entries. These are treated as place holders when we fill
792 * out the ACL. This routine does not add or remove special entries, it
793 * simply unites each special entry with its associated set of permissions.
794 */
795STATIC void
796xfs_acl_sync_mode(
797 mode_t mode,
798 xfs_acl_t *acl)
799{
800 int i, nomask = 1;
801 xfs_acl_entry_t *ap;
802 xfs_acl_entry_t *gap = NULL;
803
804 /*
805 * Set ACL entries. POSIX1003.1eD16 requires that the MASK
806 * be set instead of the GROUP entry, if there is a MASK.
807 */
808 for (ap = acl->acl_entry, i = 0; i < acl->acl_cnt; ap++, i++) {
809 switch (ap->ae_tag) {
810 case ACL_USER_OBJ:
811 ap->ae_perm = (mode >> 6) & 0x7;
812 break;
813 case ACL_GROUP_OBJ:
814 gap = ap;
815 break;
816 case ACL_MASK:
817 nomask = 0;
818 ap->ae_perm = (mode >> 3) & 0x7;
819 break;
820 case ACL_OTHER:
821 ap->ae_perm = mode & 0x7;
822 break;
823 default:
824 break;
825 }
826 }
827 /* Set the ACL_GROUP_OBJ if there's no ACL_MASK */
828 if (gap && nomask)
829 gap->ae_perm = (mode >> 3) & 0x7;
830}
831
832/*
833 * When inheriting an Access ACL from a directory Default ACL,
834 * the ACL bits are set to the intersection of the ACL default
835 * permission bits and the file permission bits in mode. If there
836 * are no permission bits on the file then we must not give them
837 * the ACL. This is what what makes umask() work with ACLs.
838 */
839STATIC void
840xfs_acl_filter_mode(
841 mode_t mode,
842 xfs_acl_t *acl)
843{
844 int i, nomask = 1;
845 xfs_acl_entry_t *ap;
846 xfs_acl_entry_t *gap = NULL;
847
848 /*
849 * Set ACL entries. POSIX1003.1eD16 requires that the MASK
850 * be merged with GROUP entry, if there is a MASK.
851 */
852 for (ap = acl->acl_entry, i = 0; i < acl->acl_cnt; ap++, i++) {
853 switch (ap->ae_tag) {
854 case ACL_USER_OBJ:
855 ap->ae_perm &= (mode >> 6) & 0x7;
856 break;
857 case ACL_GROUP_OBJ:
858 gap = ap;
859 break;
860 case ACL_MASK:
861 nomask = 0;
862 ap->ae_perm &= (mode >> 3) & 0x7;
863 break;
864 case ACL_OTHER:
865 ap->ae_perm &= mode & 0x7;
866 break;
867 default:
868 break;
869 }
870 }
871 /* Set the ACL_GROUP_OBJ if there's no ACL_MASK */
872 if (gap && nomask)
873 gap->ae_perm &= (mode >> 3) & 0x7;
874}
diff --git a/fs/xfs/xfs_acl.h b/fs/xfs/xfs_acl.h
index 642f1db4def4..63dc1f2efad5 100644
--- a/fs/xfs/xfs_acl.h
+++ b/fs/xfs/xfs_acl.h
@@ -18,81 +18,48 @@
18#ifndef __XFS_ACL_H__ 18#ifndef __XFS_ACL_H__
19#define __XFS_ACL_H__ 19#define __XFS_ACL_H__
20 20
21/* 21struct inode;
22 * Access Control Lists 22struct posix_acl;
23 */ 23struct xfs_inode;
24typedef __uint16_t xfs_acl_perm_t;
25typedef __int32_t xfs_acl_tag_t;
26typedef __int32_t xfs_acl_id_t;
27 24
28#define XFS_ACL_MAX_ENTRIES 25 25#define XFS_ACL_MAX_ENTRIES 25
29#define XFS_ACL_NOT_PRESENT (-1) 26#define XFS_ACL_NOT_PRESENT (-1)
30 27
31typedef struct xfs_acl_entry { 28/* On-disk XFS access control list structure */
32 xfs_acl_tag_t ae_tag; 29struct xfs_acl {
33 xfs_acl_id_t ae_id; 30 __be32 acl_cnt;
34 xfs_acl_perm_t ae_perm; 31 struct xfs_acl_entry {
35} xfs_acl_entry_t; 32 __be32 ae_tag;
36 33 __be32 ae_id;
37typedef struct xfs_acl { 34 __be16 ae_perm;
38 __int32_t acl_cnt; 35 } acl_entry[XFS_ACL_MAX_ENTRIES];
39 xfs_acl_entry_t acl_entry[XFS_ACL_MAX_ENTRIES]; 36};
40} xfs_acl_t;
41 37
42/* On-disk XFS extended attribute names */ 38/* On-disk XFS extended attribute names */
43#define SGI_ACL_FILE "SGI_ACL_FILE" 39#define SGI_ACL_FILE "SGI_ACL_FILE"
44#define SGI_ACL_DEFAULT "SGI_ACL_DEFAULT" 40#define SGI_ACL_DEFAULT "SGI_ACL_DEFAULT"
45#define SGI_ACL_FILE_SIZE (sizeof(SGI_ACL_FILE)-1) 41#define SGI_ACL_FILE_SIZE (sizeof(SGI_ACL_FILE)-1)
46#define SGI_ACL_DEFAULT_SIZE (sizeof(SGI_ACL_DEFAULT)-1) 42#define SGI_ACL_DEFAULT_SIZE (sizeof(SGI_ACL_DEFAULT)-1)
47 43
48#define _ACL_TYPE_ACCESS 1
49#define _ACL_TYPE_DEFAULT 2
50
51#ifdef CONFIG_XFS_POSIX_ACL 44#ifdef CONFIG_XFS_POSIX_ACL
45extern int xfs_check_acl(struct inode *inode, int mask);
46extern struct posix_acl *xfs_get_acl(struct inode *inode, int type);
47extern int xfs_inherit_acl(struct inode *inode, struct posix_acl *default_acl);
48extern int xfs_acl_chmod(struct inode *inode);
49extern void xfs_inode_init_acls(struct xfs_inode *ip);
50extern void xfs_inode_clear_acls(struct xfs_inode *ip);
51extern int posix_acl_access_exists(struct inode *inode);
52extern int posix_acl_default_exists(struct inode *inode);
52 53
53struct vattr; 54extern struct xattr_handler xfs_xattr_system_handler;
54struct xfs_inode;
55
56extern struct kmem_zone *xfs_acl_zone;
57#define xfs_acl_zone_init(zone, name) \
58 (zone) = kmem_zone_init(sizeof(xfs_acl_t), (name))
59#define xfs_acl_zone_destroy(zone) kmem_zone_destroy(zone)
60
61extern int xfs_acl_inherit(struct inode *, mode_t mode, xfs_acl_t *);
62extern int xfs_acl_iaccess(struct xfs_inode *, mode_t, cred_t *);
63extern int xfs_acl_vtoacl(struct inode *, xfs_acl_t *, xfs_acl_t *);
64extern int xfs_acl_vhasacl_access(struct inode *);
65extern int xfs_acl_vhasacl_default(struct inode *);
66extern int xfs_acl_vset(struct inode *, void *, size_t, int);
67extern int xfs_acl_vget(struct inode *, void *, size_t, int);
68extern int xfs_acl_vremove(struct inode *, int);
69
70#define _ACL_PERM_INVALID(perm) ((perm) & ~(ACL_READ|ACL_WRITE|ACL_EXECUTE))
71
72#define _ACL_INHERIT(c,m,d) (xfs_acl_inherit(c,m,d))
73#define _ACL_GET_ACCESS(pv,pa) (xfs_acl_vtoacl(pv,pa,NULL) == 0)
74#define _ACL_GET_DEFAULT(pv,pd) (xfs_acl_vtoacl(pv,NULL,pd) == 0)
75#define _ACL_ACCESS_EXISTS xfs_acl_vhasacl_access
76#define _ACL_DEFAULT_EXISTS xfs_acl_vhasacl_default
77
78#define _ACL_ALLOC(a) ((a) = kmem_zone_alloc(xfs_acl_zone, KM_SLEEP))
79#define _ACL_FREE(a) ((a)? kmem_zone_free(xfs_acl_zone, (a)):(void)0)
80
81#else 55#else
82#define xfs_acl_zone_init(zone,name) 56# define xfs_check_acl NULL
83#define xfs_acl_zone_destroy(zone) 57# define xfs_get_acl(inode, type) NULL
84#define xfs_acl_vset(v,p,sz,t) (-EOPNOTSUPP) 58# define xfs_inherit_acl(inode, default_acl) 0
85#define xfs_acl_vget(v,p,sz,t) (-EOPNOTSUPP) 59# define xfs_acl_chmod(inode) 0
86#define xfs_acl_vremove(v,t) (-EOPNOTSUPP) 60# define xfs_inode_init_acls(ip)
87#define xfs_acl_vhasacl_access(v) (0) 61# define xfs_inode_clear_acls(ip)
88#define xfs_acl_vhasacl_default(v) (0) 62# define posix_acl_access_exists(inode) 0
89#define _ACL_ALLOC(a) (1) /* successfully allocate nothing */ 63# define posix_acl_default_exists(inode) 0
90#define _ACL_FREE(a) ((void)0) 64#endif /* CONFIG_XFS_POSIX_ACL */
91#define _ACL_INHERIT(c,m,d) (0)
92#define _ACL_GET_ACCESS(pv,pa) (0)
93#define _ACL_GET_DEFAULT(pv,pd) (0)
94#define _ACL_ACCESS_EXISTS (NULL)
95#define _ACL_DEFAULT_EXISTS (NULL)
96#endif
97
98#endif /* __XFS_ACL_H__ */ 65#endif /* __XFS_ACL_H__ */
diff --git a/fs/xfs/xfs_arch.h b/fs/xfs/xfs_arch.h
index 53d5e70d1360..0902249354a0 100644
--- a/fs/xfs/xfs_arch.h
+++ b/fs/xfs/xfs_arch.h
@@ -73,28 +73,6 @@ static inline void be64_add_cpu(__be64 *a, __s64 b)
73 73
74#endif /* __KERNEL__ */ 74#endif /* __KERNEL__ */
75 75
76/* do we need conversion? */
77#define ARCH_NOCONVERT 1
78#ifdef XFS_NATIVE_HOST
79# define ARCH_CONVERT ARCH_NOCONVERT
80#else
81# define ARCH_CONVERT 0
82#endif
83
84/* generic swapping macros */
85
86#ifndef HAVE_SWABMACROS
87#define INT_SWAP16(type,var) ((typeof(type))(__swab16((__u16)(var))))
88#define INT_SWAP32(type,var) ((typeof(type))(__swab32((__u32)(var))))
89#define INT_SWAP64(type,var) ((typeof(type))(__swab64((__u64)(var))))
90#endif
91
92#define INT_SWAP(type, var) \
93 ((sizeof(type) == 8) ? INT_SWAP64(type,var) : \
94 ((sizeof(type) == 4) ? INT_SWAP32(type,var) : \
95 ((sizeof(type) == 2) ? INT_SWAP16(type,var) : \
96 (var))))
97
98/* 76/*
99 * get and set integers from potentially unaligned locations 77 * get and set integers from potentially unaligned locations
100 */ 78 */
@@ -107,16 +85,6 @@ static inline void be64_add_cpu(__be64 *a, __s64 b)
107 ((__u8*)(pointer))[1] = (((value) ) & 0xff); \ 85 ((__u8*)(pointer))[1] = (((value) ) & 0xff); \
108 } 86 }
109 87
110/* does not return a value */
111#define INT_SET(reference,arch,valueref) \
112 (__builtin_constant_p(valueref) ? \
113 (void)( (reference) = ( ((arch) != ARCH_NOCONVERT) ? (INT_SWAP((reference),(valueref))) : (valueref)) ) : \
114 (void)( \
115 ((reference) = (valueref)), \
116 ( ((arch) != ARCH_NOCONVERT) ? (reference) = INT_SWAP((reference),(reference)) : 0 ) \
117 ) \
118 )
119
120/* 88/*
121 * In directories inode numbers are stored as unaligned arrays of unsigned 89 * In directories inode numbers are stored as unaligned arrays of unsigned
122 * 8bit integers on disk. 90 * 8bit integers on disk.
diff --git a/fs/xfs/xfs_attr.c b/fs/xfs/xfs_attr.c
index cd1008b1c4cd..db15feb906ff 100644
--- a/fs/xfs/xfs_attr.c
+++ b/fs/xfs/xfs_attr.c
@@ -45,7 +45,6 @@
45#include "xfs_error.h" 45#include "xfs_error.h"
46#include "xfs_quota.h" 46#include "xfs_quota.h"
47#include "xfs_trans_space.h" 47#include "xfs_trans_space.h"
48#include "xfs_acl.h"
49#include "xfs_rw.h" 48#include "xfs_rw.h"
50#include "xfs_vnodeops.h" 49#include "xfs_vnodeops.h"
51 50
diff --git a/fs/xfs/xfs_iget.c b/fs/xfs/xfs_iget.c
index 73e1c0d767ac..76c540f719e4 100644
--- a/fs/xfs/xfs_iget.c
+++ b/fs/xfs/xfs_iget.c
@@ -18,6 +18,7 @@
18#include "xfs.h" 18#include "xfs.h"
19#include "xfs_fs.h" 19#include "xfs_fs.h"
20#include "xfs_types.h" 20#include "xfs_types.h"
21#include "xfs_acl.h"
21#include "xfs_bit.h" 22#include "xfs_bit.h"
22#include "xfs_log.h" 23#include "xfs_log.h"
23#include "xfs_inum.h" 24#include "xfs_inum.h"
@@ -82,6 +83,7 @@ xfs_inode_alloc(
82 memset(&ip->i_d, 0, sizeof(xfs_icdinode_t)); 83 memset(&ip->i_d, 0, sizeof(xfs_icdinode_t));
83 ip->i_size = 0; 84 ip->i_size = 0;
84 ip->i_new_size = 0; 85 ip->i_new_size = 0;
86 xfs_inode_init_acls(ip);
85 87
86 /* 88 /*
87 * Initialize inode's trace buffers. 89 * Initialize inode's trace buffers.
@@ -558,6 +560,7 @@ xfs_ireclaim(
558 ASSERT(atomic_read(&ip->i_pincount) == 0); 560 ASSERT(atomic_read(&ip->i_pincount) == 0);
559 ASSERT(!spin_is_locked(&ip->i_flags_lock)); 561 ASSERT(!spin_is_locked(&ip->i_flags_lock));
560 ASSERT(completion_done(&ip->i_flush)); 562 ASSERT(completion_done(&ip->i_flush));
563 xfs_inode_clear_acls(ip);
561 kmem_zone_free(xfs_inode_zone, ip); 564 kmem_zone_free(xfs_inode_zone, ip);
562} 565}
563 566
diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
index 123b20c8cbf2..1f22d65fed0a 100644
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -49,7 +49,6 @@
49#include "xfs_utils.h" 49#include "xfs_utils.h"
50#include "xfs_dir2_trace.h" 50#include "xfs_dir2_trace.h"
51#include "xfs_quota.h" 51#include "xfs_quota.h"
52#include "xfs_acl.h"
53#include "xfs_filestream.h" 52#include "xfs_filestream.h"
54#include "xfs_vnodeops.h" 53#include "xfs_vnodeops.h"
55 54
diff --git a/fs/xfs/xfs_inode.h b/fs/xfs/xfs_inode.h
index f879c1bc4b96..77016702938b 100644
--- a/fs/xfs/xfs_inode.h
+++ b/fs/xfs/xfs_inode.h
@@ -18,6 +18,7 @@
18#ifndef __XFS_INODE_H__ 18#ifndef __XFS_INODE_H__
19#define __XFS_INODE_H__ 19#define __XFS_INODE_H__
20 20
21struct posix_acl;
21struct xfs_dinode; 22struct xfs_dinode;
22struct xfs_inode; 23struct xfs_inode;
23 24
@@ -272,6 +273,11 @@ typedef struct xfs_inode {
272 /* VFS inode */ 273 /* VFS inode */
273 struct inode i_vnode; /* embedded VFS inode */ 274 struct inode i_vnode; /* embedded VFS inode */
274 275
276#ifdef CONFIG_XFS_POSIX_ACL
277 struct posix_acl *i_acl;
278 struct posix_acl *i_default_acl;
279#endif
280
275 /* Trace buffers per inode. */ 281 /* Trace buffers per inode. */
276#ifdef XFS_INODE_TRACE 282#ifdef XFS_INODE_TRACE
277 struct ktrace *i_trace; /* general inode trace */ 283 struct ktrace *i_trace; /* general inode trace */
diff --git a/fs/xfs/xfs_iomap.c b/fs/xfs/xfs_iomap.c
index feb30a92549b..67ae5555a30a 100644
--- a/fs/xfs/xfs_iomap.c
+++ b/fs/xfs/xfs_iomap.c
@@ -42,7 +42,6 @@
42#include "xfs_error.h" 42#include "xfs_error.h"
43#include "xfs_itable.h" 43#include "xfs_itable.h"
44#include "xfs_rw.h" 44#include "xfs_rw.h"
45#include "xfs_acl.h"
46#include "xfs_attr.h" 45#include "xfs_attr.h"
47#include "xfs_buf_item.h" 46#include "xfs_buf_item.h"
48#include "xfs_trans_space.h" 47#include "xfs_trans_space.h"
diff --git a/fs/xfs/xfs_rw.c b/fs/xfs/xfs_rw.c
index 36f3a21c54d2..fea68615ed23 100644
--- a/fs/xfs/xfs_rw.c
+++ b/fs/xfs/xfs_rw.c
@@ -41,7 +41,6 @@
41#include "xfs_ialloc.h" 41#include "xfs_ialloc.h"
42#include "xfs_attr.h" 42#include "xfs_attr.h"
43#include "xfs_bmap.h" 43#include "xfs_bmap.h"
44#include "xfs_acl.h"
45#include "xfs_error.h" 44#include "xfs_error.h"
46#include "xfs_buf_item.h" 45#include "xfs_buf_item.h"
47#include "xfs_rw.h" 46#include "xfs_rw.h"
diff --git a/fs/xfs/xfs_vnodeops.c b/fs/xfs/xfs_vnodeops.c
index b56321b2b9f0..c4eca5ed5dab 100644
--- a/fs/xfs/xfs_vnodeops.c
+++ b/fs/xfs/xfs_vnodeops.c
@@ -42,6 +42,7 @@
42#include "xfs_ialloc.h" 42#include "xfs_ialloc.h"
43#include "xfs_alloc.h" 43#include "xfs_alloc.h"
44#include "xfs_bmap.h" 44#include "xfs_bmap.h"
45#include "xfs_acl.h"
45#include "xfs_attr.h" 46#include "xfs_attr.h"
46#include "xfs_rw.h" 47#include "xfs_rw.h"
47#include "xfs_error.h" 48#include "xfs_error.h"
@@ -467,8 +468,20 @@ xfs_setattr(
467 xfs_qm_dqrele(udqp); 468 xfs_qm_dqrele(udqp);
468 xfs_qm_dqrele(gdqp); 469 xfs_qm_dqrele(gdqp);
469 470
470 if (code) { 471 if (code)
471 return code; 472 return code;
473
474 /*
475 * XXX(hch): Updating the ACL entries is not atomic vs the i_mode
476 * update. We could avoid this with linked transactions
477 * and passing down the transaction pointer all the way
478 * to attr_set. No previous user of the generic
479 * Posix ACL code seems to care about this issue either.
480 */
481 if ((mask & ATTR_MODE) && !(flags & XFS_ATTR_NOACL)) {
482 code = -xfs_acl_chmod(inode);
483 if (code)
484 return XFS_ERROR(code);
472 } 485 }
473 486
474 if (DM_EVENT_ENABLED(ip, DM_EVENT_ATTRIBUTE) && 487 if (DM_EVENT_ENABLED(ip, DM_EVENT_ATTRIBUTE) &&
diff --git a/fs/xfs/xfs_vnodeops.h b/fs/xfs/xfs_vnodeops.h
index 04373c6c61ff..a9e102de71a1 100644
--- a/fs/xfs/xfs_vnodeops.h
+++ b/fs/xfs/xfs_vnodeops.h
@@ -18,6 +18,7 @@ int xfs_setattr(struct xfs_inode *ip, struct iattr *vap, int flags);
18#define XFS_ATTR_DMI 0x01 /* invocation from a DMI function */ 18#define XFS_ATTR_DMI 0x01 /* invocation from a DMI function */
19#define XFS_ATTR_NONBLOCK 0x02 /* return EAGAIN if operation would block */ 19#define XFS_ATTR_NONBLOCK 0x02 /* return EAGAIN if operation would block */
20#define XFS_ATTR_NOLOCK 0x04 /* Don't grab any conflicting locks */ 20#define XFS_ATTR_NOLOCK 0x04 /* Don't grab any conflicting locks */
21#define XFS_ATTR_NOACL 0x08 /* Don't call xfs_acl_chmod */
21 22
22int xfs_readlink(struct xfs_inode *ip, char *link); 23int xfs_readlink(struct xfs_inode *ip, char *link);
23int xfs_fsync(struct xfs_inode *ip); 24int xfs_fsync(struct xfs_inode *ip);
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-23 10:50:22 -0500