1
2#include <linux/init.h>
3#include <linux/posix_acl.h>
4
5#define REISERFS_ACL_VERSION 0x0001
6
7typedef struct {
8 __le16 e_tag;
9 __le16 e_perm;
10 __le32 e_id;
11} reiserfs_acl_entry;
12
13typedef struct {
14 __le16 e_tag;
15 __le16 e_perm;
16} reiserfs_acl_entry_short;
17
18typedef struct {
19 __le32 a_version;
20} reiserfs_acl_header;
21
22static 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
34static 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#ifdef CONFIG_REISERFS_FS_POSIX_ACL
51struct posix_acl *reiserfs_get_acl(struct inode *inode, int type, bool rcu);
52int reiserfs_set_acl(struct user_namespace *mnt_userns, struct inode *inode,
53 struct posix_acl *acl, int type);
54int reiserfs_acl_chmod(struct inode *inode);
55int reiserfs_inherit_default_acl(struct reiserfs_transaction_handle *th,
56 struct inode *dir, struct dentry *dentry,
57 struct inode *inode);
58int reiserfs_cache_default_acl(struct inode *dir);
59
60#else
61
62#define reiserfs_cache_default_acl(inode) 0
63#define reiserfs_get_acl NULL
64#define reiserfs_set_acl NULL
65
66static inline int reiserfs_acl_chmod(struct inode *inode)
67{
68 return 0;
69}
70
71static inline int
72reiserfs_inherit_default_acl(struct reiserfs_transaction_handle *th,
73 const struct inode *dir, struct dentry *dentry,
74 struct inode *inode)
75{
76 return 0;
77}
78#endif
79
