2 * Copyright (C) 2007 Red Hat. All rights reserved.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public
6 * License v2 as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public
14 * License along with this program; if not, write to the
15 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
16 * Boston, MA 021110-1307, USA.
20 #include <linux/string.h>
21 #include <linux/xattr.h>
22 #include <linux/posix_acl_xattr.h>
23 #include <linux/sched.h>
26 #ifndef is_owner_or_cap
27 #define is_owner_or_cap(inode) \
28 ((current->fsuid == (inode)->i_uid) || capable(CAP_FOWNER))
31 static int btrfs_xattr_set_acl(struct inode *inode, int type,
32 const void *value, size_t size)
35 struct posix_acl *acl;
37 if (!is_owner_or_cap(inode))
40 acl = posix_acl_from_xattr(value, size);
44 } else if (IS_ERR(acl)) {
47 ret = posix_acl_valid(acl);
48 posix_acl_release(acl);
53 return btrfs_xattr_set(inode, type, "", value, size, 0);
56 static int btrfs_xattr_get_acl(struct inode *inode, int type,
57 void *value, size_t size)
59 return btrfs_xattr_get(inode, type, "", value, size);
61 static int btrfs_xattr_acl_access_get(struct inode *inode, const char *name,
62 void *value, size_t size)
66 return btrfs_xattr_get_acl(inode, BTRFS_XATTR_INDEX_POSIX_ACL_ACCESS,
69 static int btrfs_xattr_acl_access_set(struct inode *inode, const char *name,
70 const void *value, size_t size, int flags)
74 return btrfs_xattr_set_acl(inode, BTRFS_XATTR_INDEX_POSIX_ACL_ACCESS,
77 static int btrfs_xattr_acl_default_get(struct inode *inode, const char *name,
78 void *value, size_t size)
82 return btrfs_xattr_get_acl(inode, BTRFS_XATTR_INDEX_POSIX_ACL_DEFAULT,
85 static int btrfs_xattr_acl_default_set(struct inode *inode, const char *name,
86 const void *value, size_t size, int flags)
90 return btrfs_xattr_set_acl(inode, BTRFS_XATTR_INDEX_POSIX_ACL_DEFAULT,
93 struct xattr_handler btrfs_xattr_acl_default_handler = {
94 .prefix = POSIX_ACL_XATTR_DEFAULT,
95 .list = btrfs_xattr_generic_list,
96 .get = btrfs_xattr_acl_default_get,
97 .set = btrfs_xattr_acl_default_set,
100 struct xattr_handler btrfs_xattr_acl_access_handler = {
101 .prefix = POSIX_ACL_XATTR_ACCESS,
102 .list = btrfs_xattr_generic_list,
103 .get = btrfs_xattr_acl_access_get,
104 .set = btrfs_xattr_acl_access_set,