Commit | Line | Data |
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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 LT |
2 | /* |
3 | File: fs/ext2/acl.h | |
4 | ||
5 | (C) 2001 Andreas Gruenbacher, <a.gruenbacher@computer.org> | |
6 | */ | |
7 | ||
9a59f452 | 8 | #include <linux/posix_acl_xattr.h> |
1da177e4 LT |
9 | |
10 | #define EXT2_ACL_VERSION 0x0001 | |
11 | ||
12 | typedef struct { | |
13 | __le16 e_tag; | |
14 | __le16 e_perm; | |
15 | __le32 e_id; | |
16 | } ext2_acl_entry; | |
17 | ||
18 | typedef struct { | |
19 | __le16 e_tag; | |
20 | __le16 e_perm; | |
21 | } ext2_acl_entry_short; | |
22 | ||
23 | typedef struct { | |
24 | __le32 a_version; | |
25 | } ext2_acl_header; | |
26 | ||
27 | static inline size_t ext2_acl_size(int count) | |
28 | { | |
29 | if (count <= 4) { | |
30 | return sizeof(ext2_acl_header) + | |
31 | count * sizeof(ext2_acl_entry_short); | |
32 | } else { | |
33 | return sizeof(ext2_acl_header) + | |
34 | 4 * sizeof(ext2_acl_entry_short) + | |
35 | (count - 4) * sizeof(ext2_acl_entry); | |
36 | } | |
37 | } | |
38 | ||
39 | static inline int ext2_acl_count(size_t size) | |
40 | { | |
41 | ssize_t s; | |
42 | size -= sizeof(ext2_acl_header); | |
43 | s = size - 4 * sizeof(ext2_acl_entry_short); | |
44 | if (s < 0) { | |
45 | if (size % sizeof(ext2_acl_entry_short)) | |
46 | return -1; | |
47 | return size / sizeof(ext2_acl_entry_short); | |
48 | } else { | |
49 | if (s % sizeof(ext2_acl_entry)) | |
50 | return -1; | |
51 | return s / sizeof(ext2_acl_entry) + 4; | |
52 | } | |
53 | } | |
54 | ||
55 | #ifdef CONFIG_EXT2_FS_POSIX_ACL | |
56 | ||
1da177e4 | 57 | /* acl.c */ |
0cad6246 | 58 | extern struct posix_acl *ext2_get_acl(struct inode *inode, int type, bool rcu); |
13e83a49 | 59 | extern int ext2_set_acl(struct mnt_idmap *idmap, struct dentry *dentry, |
549c7297 | 60 | struct posix_acl *acl, int type); |
1da177e4 LT |
61 | extern int ext2_init_acl (struct inode *, struct inode *); |
62 | ||
63 | #else | |
64 | #include <linux/sched.h> | |
4e34e719 | 65 | #define ext2_get_acl NULL |
1da177e4 LT |
66 | #define ext2_set_acl NULL |
67 | ||
1da177e4 LT |
68 | static inline int ext2_init_acl (struct inode *inode, struct inode *dir) |
69 | { | |
70 | return 0; | |
71 | } | |
72 | #endif | |
73 |