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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | File: linux/posix_acl_xattr.h | |
3 | ||
4 | Extended attribute system call representation of Access Control Lists. | |
5 | ||
6 | Copyright (C) 2000 by Andreas Gruenbacher <a.gruenbacher@computer.org> | |
7 | Copyright (C) 2002 SGI - Silicon Graphics, Inc <linux-xfs@oss.sgi.com> | |
8 | */ | |
9 | #ifndef _POSIX_ACL_XATTR_H | |
10 | #define _POSIX_ACL_XATTR_H | |
11 | ||
97d79299 | 12 | #include <uapi/linux/xattr.h> |
bc8bcf3b | 13 | #include <uapi/linux/posix_acl_xattr.h> |
1da177e4 LT |
14 | #include <linux/posix_acl.h> |
15 | ||
1da177e4 LT |
16 | static inline size_t |
17 | posix_acl_xattr_size(int count) | |
18 | { | |
2211d5ba AG |
19 | return (sizeof(struct posix_acl_xattr_header) + |
20 | (count * sizeof(struct posix_acl_xattr_entry))); | |
1da177e4 LT |
21 | } |
22 | ||
23 | static inline int | |
24 | posix_acl_xattr_count(size_t size) | |
25 | { | |
2211d5ba | 26 | if (size < sizeof(struct posix_acl_xattr_header)) |
1da177e4 | 27 | return -1; |
2211d5ba AG |
28 | size -= sizeof(struct posix_acl_xattr_header); |
29 | if (size % sizeof(struct posix_acl_xattr_entry)) | |
1da177e4 | 30 | return -1; |
2211d5ba | 31 | return size / sizeof(struct posix_acl_xattr_entry); |
1da177e4 LT |
32 | } |
33 | ||
2f6f0654 | 34 | #ifdef CONFIG_FS_POSIX_ACL |
78ef7da5 SF |
35 | int posix_acl_fix_xattr_userns(struct user_namespace *to, |
36 | struct user_namespace *from, | |
37 | void *value, size_t size); | |
2f6f0654 EB |
38 | void posix_acl_fix_xattr_from_user(void *value, size_t size); |
39 | void posix_acl_fix_xattr_to_user(void *value, size_t size); | |
40 | #else | |
78ef7da5 SF |
41 | static inline int posix_acl_fix_xattr_userns(struct user_namespace *to, |
42 | struct user_namespace *from, | |
43 | void *value, size_t size) | |
44 | { | |
45 | return 0; | |
46 | } | |
2f6f0654 EB |
47 | static inline void posix_acl_fix_xattr_from_user(void *value, size_t size) |
48 | { | |
49 | } | |
50 | static inline void posix_acl_fix_xattr_to_user(void *value, size_t size) | |
51 | { | |
52 | } | |
53 | #endif | |
54 | ||
5f3a4a28 EB |
55 | struct posix_acl *posix_acl_from_xattr(struct user_namespace *user_ns, |
56 | const void *value, size_t size); | |
57 | int posix_acl_to_xattr(struct user_namespace *user_ns, | |
58 | const struct posix_acl *acl, void *buffer, size_t size); | |
9a59f452 | 59 | |
2aeccbe9 CH |
60 | extern const struct xattr_handler posix_acl_access_xattr_handler; |
61 | extern const struct xattr_handler posix_acl_default_xattr_handler; | |
62 | ||
1da177e4 | 63 | #endif /* _POSIX_ACL_XATTR_H */ |