summaryrefslogtreecommitdiff
path: root/fs/reiserfs/xattr_security.c
blob: 1958b361c35d62867dfd2adefe25464c8bb45422 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
#include <linux/reiserfs_fs.h>
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/pagemap.h>
#include <linux/xattr.h>
#include <linux/reiserfs_xattr.h>
#include <asm/uaccess.h>

static int
security_get(struct inode *inode, const char *name, void *buffer, size_t size)
{
	if (strlen(name) < sizeof(XATTR_SECURITY_PREFIX))
		return -EINVAL;

	if (IS_PRIVATE(inode))
		return -EPERM;

	return reiserfs_xattr_get(inode, name, buffer, size);
}

static int
security_set(struct inode *inode, const char *name, const void *buffer,
	     size_t size, int flags)
{
	if (strlen(name) < sizeof(XATTR_SECURITY_PREFIX))
		return -EINVAL;

	if (IS_PRIVATE(inode))
		return -EPERM;

	return reiserfs_xattr_set(inode, name, buffer, size, flags);
}

static int security_del(struct inode *inode, const char *name)
{
	if (strlen(name) < sizeof(XATTR_SECURITY_PREFIX))
		return -EINVAL;

	if (IS_PRIVATE(inode))
		return -EPERM;

	return 0;
}

static int
security_list(struct inode *inode, const char *name, int namelen, char *out)
{
	int len = namelen;

	if (IS_PRIVATE(inode))
		return 0;

	if (out)
		memcpy(out, name, len);

	return len;
}

struct reiserfs_xattr_handler security_handler = {
	.prefix = XATTR_SECURITY_PREFIX,
	.get = security_get,
	.set = security_set,
	.del = security_del,
	.list = security_list,
};