blob: 806ec5b067075554792d5631996b24595157d697 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001#include <linux/init.h>
2#include <linux/posix_acl.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07003
4#define REISERFS_ACL_VERSION 0x0001
5
6typedef struct {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -07007 __le16 e_tag;
8 __le16 e_perm;
9 __le32 e_id;
Linus Torvalds1da177e2005-04-16 15:20:36 -070010} reiserfs_acl_entry;
11
12typedef struct {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070013 __le16 e_tag;
14 __le16 e_perm;
Linus Torvalds1da177e2005-04-16 15:20:36 -070015} reiserfs_acl_entry_short;
16
17typedef struct {
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070018 __le32 a_version;
Linus Torvalds1da177e2005-04-16 15:20:36 -070019} reiserfs_acl_header;
20
21static inline size_t reiserfs_acl_size(int count)
22{
23 if (count <= 4) {
24 return sizeof(reiserfs_acl_header) +
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070025 count * sizeof(reiserfs_acl_entry_short);
Linus Torvalds1da177e2005-04-16 15:20:36 -070026 } else {
27 return sizeof(reiserfs_acl_header) +
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070028 4 * sizeof(reiserfs_acl_entry_short) +
29 (count - 4) * sizeof(reiserfs_acl_entry);
Linus Torvalds1da177e2005-04-16 15:20:36 -070030 }
31}
32
33static 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
Linus Torvalds1da177e2005-04-16 15:20:36 -070049#ifdef CONFIG_REISERFS_FS_POSIX_ACL
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070050struct posix_acl *reiserfs_get_acl(struct inode *inode, int type);
51int reiserfs_acl_chmod(struct inode *inode);
52int reiserfs_inherit_default_acl(struct inode *dir, struct dentry *dentry,
53 struct inode *inode);
54int reiserfs_cache_default_acl(struct inode *dir);
55extern int reiserfs_xattr_posix_acl_init(void) __init;
56extern int reiserfs_xattr_posix_acl_exit(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -070057extern struct reiserfs_xattr_handler posix_acl_default_handler;
58extern struct reiserfs_xattr_handler posix_acl_access_handler;
59#else
60
Linus Torvalds1da177e2005-04-16 15:20:36 -070061#define reiserfs_cache_default_acl(inode) 0
62
Andrew Mortonbc5e4832006-02-04 23:27:51 -080063static inline struct posix_acl *reiserfs_get_acl(struct inode *inode, int type)
64{
65 return NULL;
66}
67
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070068static inline int reiserfs_xattr_posix_acl_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -070069{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070070 return 0;
71}
72
73static inline int reiserfs_xattr_posix_acl_exit(void)
74{
75 return 0;
76}
77
78static inline int reiserfs_acl_chmod(struct inode *inode)
79{
80 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -070081}
82
83static inline int
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070084reiserfs_inherit_default_acl(const struct inode *dir, struct dentry *dentry,
85 struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -070086{
Linus Torvaldsbd4c6252005-07-12 20:21:28 -070087 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -070088}
89
90#endif