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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 reiserfs_transaction_handle *th, |
53 | struct inode *dir, struct dentry *dentry, |
54 | struct inode *inode); |
55 | int reiserfs_cache_default_acl(struct inode *dir); |
56 | extern struct xattr_handler reiserfs_posix_acl_default_handler; |
57 | extern struct xattr_handler reiserfs_posix_acl_access_handler; |
58 | |
59 | #else |
60 | |
61 | #define reiserfs_cache_default_acl(inode) 0 |
62 | |
63 | static inline struct posix_acl *reiserfs_get_acl(struct inode *inode, int type) |
64 | { |
65 | return NULL; |
66 | } |
67 | |
68 | static inline int reiserfs_acl_chmod(struct inode *inode) |
69 | { |
70 | return 0; |
71 | } |
72 | |
73 | static inline int |
74 | reiserfs_inherit_default_acl(struct reiserfs_transaction_handle *th, |
75 | const struct inode *dir, struct dentry *dentry, |
76 | struct inode *inode) |
77 | { |
78 | return 0; |
79 | } |
80 | #endif |
81 |
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