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1 | #include <linux/init.h> | |
2 | #include <linux/posix_acl.h> | |
3 | ||
4 | #define REISERFS_ACL_VERSION 0x0001 | |
5 | ||
6 | typedef struct { | |
7 | __le16 e_tag; | |
8 | __le16 e_perm; | |
9 | __le32 e_id; | |
10 | } reiserfs_acl_entry; | |
11 | ||
12 | typedef struct { | |
13 | __le16 e_tag; | |
14 | __le16 e_perm; | |
15 | } reiserfs_acl_entry_short; | |
16 | ||
17 | typedef struct { | |
18 | __le32 a_version; | |
19 | } reiserfs_acl_header; | |
20 | ||
21 | static inline size_t reiserfs_acl_size(int count) | |
22 | { | |
23 | if (count <= 4) { | |
24 | return sizeof(reiserfs_acl_header) + | |
25 | count * sizeof(reiserfs_acl_entry_short); | |
26 | } else { | |
27 | return sizeof(reiserfs_acl_header) + | |
28 | 4 * sizeof(reiserfs_acl_entry_short) + | |
29 | (count - 4) * sizeof(reiserfs_acl_entry); | |
30 | } | |
31 | } | |
32 | ||
33 | static inline int reiserfs_acl_count(size_t size) | |
34 | { | |
35 | ssize_t s; | |
36 | size -= sizeof(reiserfs_acl_header); | |
37 | s = size - 4 * sizeof(reiserfs_acl_entry_short); | |
38 | if (s < 0) { | |
39 | if (size % sizeof(reiserfs_acl_entry_short)) | |
40 | return -1; | |
41 | return size / sizeof(reiserfs_acl_entry_short); | |
42 | } else { | |
43 | if (s % sizeof(reiserfs_acl_entry)) | |
44 | return -1; | |
45 | return s / sizeof(reiserfs_acl_entry) + 4; | |
46 | } | |
47 | } | |
48 | ||
49 | #ifdef CONFIG_REISERFS_FS_POSIX_ACL | |
50 | struct posix_acl *reiserfs_get_acl(struct inode *inode, int type); | |
51 | int reiserfs_acl_chmod(struct inode *inode); | |
52 | int reiserfs_inherit_default_acl(struct inode *dir, struct dentry *dentry, | |
53 | struct inode *inode); | |
54 | int reiserfs_cache_default_acl(struct inode *dir); | |
55 | extern int reiserfs_xattr_posix_acl_init(void) __init; | |
56 | extern int reiserfs_xattr_posix_acl_exit(void); | |
57 | extern struct reiserfs_xattr_handler posix_acl_default_handler; | |
58 | extern struct reiserfs_xattr_handler posix_acl_access_handler; | |
59 | #else | |
60 | ||
61 | #define reiserfs_get_acl NULL | |
62 | #define reiserfs_cache_default_acl(inode) 0 | |
63 | ||
64 | static inline int reiserfs_xattr_posix_acl_init(void) | |
65 | { | |
66 | return 0; | |
67 | } | |
68 | ||
69 | static inline int reiserfs_xattr_posix_acl_exit(void) | |
70 | { | |
71 | return 0; | |
72 | } | |
73 | ||
74 | static inline int reiserfs_acl_chmod(struct inode *inode) | |
75 | { | |
76 | return 0; | |
77 | } | |
78 | ||
79 | static inline int | |
80 | reiserfs_inherit_default_acl(const struct inode *dir, struct dentry *dentry, | |
81 | struct inode *inode) | |
82 | { | |
83 | return 0; | |
84 | } | |
85 | ||
86 | #endif |