1#include <linux/init.h>
2#include <linux/posix_acl.h>
3
4#define REISERFS_ACL_VERSION	0x0001
5
6typedef struct {
7	__le16 e_tag;
8	__le16 e_perm;
9	__le32 e_id;
10} reiserfs_acl_entry;
11
12typedef struct {
13	__le16 e_tag;
14	__le16 e_perm;
15} reiserfs_acl_entry_short;
16
17typedef struct {
18	__le32 a_version;
19} reiserfs_acl_header;
20
21static 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
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
49#ifdef CONFIG_REISERFS_FS_POSIX_ACL
50struct 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);
57extern struct reiserfs_xattr_handler posix_acl_default_handler;
58extern struct reiserfs_xattr_handler posix_acl_access_handler;
59
60static inline void reiserfs_init_acl_access(struct inode *inode)
61{
62	REISERFS_I(inode)->i_acl_access = NULL;
63}
64
65static inline void reiserfs_init_acl_default(struct inode *inode)
66{
67	REISERFS_I(inode)->i_acl_default = NULL;
68}
69#else
70
71#define reiserfs_cache_default_acl(inode) 0
72
73static inline struct posix_acl *reiserfs_get_acl(struct inode *inode, int type)
74{
75	return NULL;
76}
77
78static inline int reiserfs_xattr_posix_acl_init(void)
79{
80	return 0;
81}
82
83static inline int reiserfs_xattr_posix_acl_exit(void)
84{
85	return 0;
86}
87
88static inline int reiserfs_acl_chmod(struct inode *inode)
89{
90	return 0;
91}
92
93static inline int
94reiserfs_inherit_default_acl(const struct inode *dir, struct dentry *dentry,
95			     struct inode *inode)
96{
97	return 0;
98}
99
100static inline void reiserfs_init_acl_access(struct inode *inode)
101{
102}
103
104static inline void reiserfs_init_acl_default(struct inode *inode)
105{
106}
107#endif
108