aboutsummaryrefslogtreecommitdiffstats
path: root/fs/reiserfs/xattr_trusted.c
diff options
context:
space:
mode:
Diffstat (limited to 'fs/reiserfs/xattr_trusted.c')
-rw-r--r--fs/reiserfs/xattr_trusted.c81
1 files changed, 81 insertions, 0 deletions
diff --git a/fs/reiserfs/xattr_trusted.c b/fs/reiserfs/xattr_trusted.c
new file mode 100644
index 000000000000..43762197fb0a
--- /dev/null
+++ b/fs/reiserfs/xattr_trusted.c
@@ -0,0 +1,81 @@
1#include <linux/reiserfs_fs.h>
2#include <linux/errno.h>
3#include <linux/fs.h>
4#include <linux/pagemap.h>
5#include <linux/xattr.h>
6#include <linux/reiserfs_xattr.h>
7#include <asm/uaccess.h>
8
9#define XATTR_TRUSTED_PREFIX "trusted."
10
11static int
12trusted_get (struct inode *inode, const char *name, void *buffer, size_t size)
13{
14 if (strlen(name) < sizeof(XATTR_TRUSTED_PREFIX))
15 return -EINVAL;
16
17 if (!reiserfs_xattrs (inode->i_sb))
18 return -EOPNOTSUPP;
19
20 if (!(capable(CAP_SYS_ADMIN) || is_reiserfs_priv_object(inode)))
21 return -EPERM;
22
23 return reiserfs_xattr_get (inode, name, buffer, size);
24}
25
26static int
27trusted_set (struct inode *inode, const char *name, const void *buffer,
28 size_t size, int flags)
29{
30 if (strlen(name) < sizeof(XATTR_TRUSTED_PREFIX))
31 return -EINVAL;
32
33 if (!reiserfs_xattrs (inode->i_sb))
34 return -EOPNOTSUPP;
35
36 if (!(capable(CAP_SYS_ADMIN) || is_reiserfs_priv_object(inode)))
37 return -EPERM;
38
39 return reiserfs_xattr_set (inode, name, buffer, size, flags);
40}
41
42static int
43trusted_del (struct inode *inode, const char *name)
44{
45 if (strlen(name) < sizeof(XATTR_TRUSTED_PREFIX))
46 return -EINVAL;
47
48 if (!reiserfs_xattrs (inode->i_sb))
49 return -EOPNOTSUPP;
50
51 if (!(capable(CAP_SYS_ADMIN) || is_reiserfs_priv_object(inode)))
52 return -EPERM;
53
54 return 0;
55}
56
57static int
58trusted_list (struct inode *inode, const char *name, int namelen, char *out)
59{
60 int len = namelen;
61
62 if (!reiserfs_xattrs (inode->i_sb))
63 return 0;
64
65 if (!(capable(CAP_SYS_ADMIN) || is_reiserfs_priv_object(inode)))
66 return 0;
67
68 if (out)
69 memcpy (out, name, len);
70
71 return len;
72}
73
74
75struct reiserfs_xattr_handler trusted_handler = {
76 .prefix = XATTR_TRUSTED_PREFIX,
77 .get = trusted_get,
78 .set = trusted_set,
79 .del = trusted_del,
80 .list = trusted_list,
81};