Commit | Line | Data |
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1da177e4 LT |
1 | #include <linux/init.h> |
2 | #include <linux/posix_acl.h> | |
3 | #include <linux/xattr_acl.h> | |
4 | ||
5 | #define REISERFS_ACL_VERSION 0x0001 | |
6 | ||
7 | typedef struct { | |
8 | __u16 e_tag; | |
9 | __u16 e_perm; | |
10 | __u32 e_id; | |
11 | } reiserfs_acl_entry; | |
12 | ||
13 | typedef struct { | |
14 | __u16 e_tag; | |
15 | __u16 e_perm; | |
16 | } reiserfs_acl_entry_short; | |
17 | ||
18 | typedef struct { | |
19 | __u32 a_version; | |
20 | } reiserfs_acl_header; | |
21 | ||
22 | static inline size_t reiserfs_acl_size(int count) | |
23 | { | |
24 | if (count <= 4) { | |
25 | return sizeof(reiserfs_acl_header) + | |
26 | count * sizeof(reiserfs_acl_entry_short); | |
27 | } else { | |
28 | return sizeof(reiserfs_acl_header) + | |
29 | 4 * sizeof(reiserfs_acl_entry_short) + | |
30 | (count - 4) * sizeof(reiserfs_acl_entry); | |
31 | } | |
32 | } | |
33 | ||
34 | static inline int reiserfs_acl_count(size_t size) | |
35 | { | |
36 | ssize_t s; | |
37 | size -= sizeof(reiserfs_acl_header); | |
38 | s = size - 4 * sizeof(reiserfs_acl_entry_short); | |
39 | if (s < 0) { | |
40 | if (size % sizeof(reiserfs_acl_entry_short)) | |
41 | return -1; | |
42 | return size / sizeof(reiserfs_acl_entry_short); | |
43 | } else { | |
44 | if (s % sizeof(reiserfs_acl_entry)) | |
45 | return -1; | |
46 | return s / sizeof(reiserfs_acl_entry) + 4; | |
47 | } | |
48 | } | |
49 | ||
50 | ||
51 | #ifdef CONFIG_REISERFS_FS_POSIX_ACL | |
52 | struct posix_acl * reiserfs_get_acl(struct inode *inode, int type); | |
53 | int reiserfs_acl_chmod (struct inode *inode); | |
54 | int reiserfs_inherit_default_acl (struct inode *dir, struct dentry *dentry, struct inode *inode); | |
55 | int reiserfs_cache_default_acl (struct inode *dir); | |
56 | extern int reiserfs_xattr_posix_acl_init (void) __init; | |
57 | extern int reiserfs_xattr_posix_acl_exit (void); | |
58 | extern struct reiserfs_xattr_handler posix_acl_default_handler; | |
59 | extern struct reiserfs_xattr_handler posix_acl_access_handler; | |
60 | #else | |
61 | ||
62 | #define reiserfs_get_acl NULL | |
63 | #define reiserfs_cache_default_acl(inode) 0 | |
64 | ||
65 | static inline int | |
66 | reiserfs_xattr_posix_acl_init (void) | |
67 | { | |
68 | return 0; | |
69 | } | |
70 | ||
71 | static inline int | |
72 | reiserfs_xattr_posix_acl_exit (void) | |
73 | { | |
74 | return 0; | |
75 | } | |
76 | ||
77 | static inline int | |
78 | reiserfs_acl_chmod (struct inode *inode) | |
79 | { | |
80 | return 0; | |
81 | } | |
82 | ||
83 | static inline int | |
84 | reiserfs_inherit_default_acl (const struct inode *dir, struct dentry *dentry, struct inode *inode) | |
85 | { | |
86 | return 0; | |
87 | } | |
88 | ||
89 | #endif |