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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 LT |
2 | /* |
3 | File: linux/posix_acl_xattr.h | |
4 | ||
5 | Extended attribute system call representation of Access Control Lists. | |
6 | ||
7 | Copyright (C) 2000 by Andreas Gruenbacher <a.gruenbacher@computer.org> | |
8 | Copyright (C) 2002 SGI - Silicon Graphics, Inc <linux-xfs@oss.sgi.com> | |
9 | */ | |
10 | #ifndef _POSIX_ACL_XATTR_H | |
11 | #define _POSIX_ACL_XATTR_H | |
12 | ||
97d79299 | 13 | #include <uapi/linux/xattr.h> |
bc8bcf3b | 14 | #include <uapi/linux/posix_acl_xattr.h> |
1da177e4 LT |
15 | #include <linux/posix_acl.h> |
16 | ||
1da177e4 LT |
17 | static inline size_t |
18 | posix_acl_xattr_size(int count) | |
19 | { | |
2211d5ba AG |
20 | return (sizeof(struct posix_acl_xattr_header) + |
21 | (count * sizeof(struct posix_acl_xattr_entry))); | |
1da177e4 LT |
22 | } |
23 | ||
24 | static inline int | |
25 | posix_acl_xattr_count(size_t size) | |
26 | { | |
2211d5ba | 27 | if (size < sizeof(struct posix_acl_xattr_header)) |
1da177e4 | 28 | return -1; |
2211d5ba AG |
29 | size -= sizeof(struct posix_acl_xattr_header); |
30 | if (size % sizeof(struct posix_acl_xattr_entry)) | |
1da177e4 | 31 | return -1; |
2211d5ba | 32 | return size / sizeof(struct posix_acl_xattr_entry); |
1da177e4 LT |
33 | } |
34 | ||
2f6f0654 | 35 | #ifdef CONFIG_FS_POSIX_ACL |
e65ce2a5 CB |
36 | void posix_acl_fix_xattr_from_user(struct user_namespace *mnt_userns, |
37 | void *value, size_t size); | |
38 | void posix_acl_fix_xattr_to_user(struct user_namespace *mnt_userns, | |
39 | void *value, size_t size); | |
2f6f0654 | 40 | #else |
e65ce2a5 CB |
41 | static inline void posix_acl_fix_xattr_from_user(struct user_namespace *mnt_userns, |
42 | void *value, size_t size) | |
2f6f0654 EB |
43 | { |
44 | } | |
e65ce2a5 CB |
45 | static inline void posix_acl_fix_xattr_to_user(struct user_namespace *mnt_userns, |
46 | void *value, size_t size) | |
2f6f0654 EB |
47 | { |
48 | } | |
49 | #endif | |
50 | ||
5f3a4a28 EB |
51 | struct posix_acl *posix_acl_from_xattr(struct user_namespace *user_ns, |
52 | const void *value, size_t size); | |
53 | int posix_acl_to_xattr(struct user_namespace *user_ns, | |
54 | const struct posix_acl *acl, void *buffer, size_t size); | |
9a59f452 | 55 | |
2aeccbe9 CH |
56 | extern const struct xattr_handler posix_acl_access_xattr_handler; |
57 | extern const struct xattr_handler posix_acl_default_xattr_handler; | |
58 | ||
1da177e4 | 59 | #endif /* _POSIX_ACL_XATTR_H */ |