Commit | Line | Data |
---|---|---|
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 |
318e6685 CB |
36 | struct posix_acl *posix_acl_from_xattr(struct user_namespace *user_ns, |
37 | const void *value, size_t size); | |
2f6f0654 | 38 | #else |
318e6685 CB |
39 | static inline struct posix_acl * |
40 | posix_acl_from_xattr(struct user_namespace *user_ns, const void *value, | |
41 | size_t size) | |
42 | { | |
43 | return ERR_PTR(-EOPNOTSUPP); | |
44 | } | |
2f6f0654 EB |
45 | #endif |
46 | ||
5f3a4a28 EB |
47 | int posix_acl_to_xattr(struct user_namespace *user_ns, |
48 | const struct posix_acl *acl, void *buffer, size_t size); | |
6cd4d4e8 CB |
49 | static inline const char *posix_acl_xattr_name(int type) |
50 | { | |
51 | switch (type) { | |
52 | case ACL_TYPE_ACCESS: | |
53 | return XATTR_NAME_POSIX_ACL_ACCESS; | |
54 | case ACL_TYPE_DEFAULT: | |
55 | return XATTR_NAME_POSIX_ACL_DEFAULT; | |
56 | } | |
57 | ||
58 | return ""; | |
59 | } | |
9a59f452 | 60 | |
e4cc9163 CB |
61 | static inline int posix_acl_type(const char *name) |
62 | { | |
63 | if (strcmp(name, XATTR_NAME_POSIX_ACL_ACCESS) == 0) | |
64 | return ACL_TYPE_ACCESS; | |
65 | else if (strcmp(name, XATTR_NAME_POSIX_ACL_DEFAULT) == 0) | |
66 | return ACL_TYPE_DEFAULT; | |
67 | ||
68 | return -1; | |
69 | } | |
70 | ||
d549b741 CB |
71 | /* These are legacy handlers. Don't use them for new code. */ |
72 | extern const struct xattr_handler nop_posix_acl_access; | |
73 | extern const struct xattr_handler nop_posix_acl_default; | |
2aeccbe9 | 74 | |
1da177e4 | 75 | #endif /* _POSIX_ACL_XATTR_H */ |