summaryrefslogtreecommitdiffstats
path: root/include/linux/reiserfs_acl.h
blob: d180446470f2ff4ffe9d550203e0a36067e80593 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
#include <linux/init.h>
#include <linux/posix_acl.h>

#define REISERFS_ACL_VERSION	0x0001

typedef struct {
	__le16 e_tag;
	__le16 e_perm;
	__le32 e_id;
} reiserfs_acl_entry;

typedef struct {
	__le16 e_tag;
	__le16 e_perm;
} reiserfs_acl_entry_short;

typedef struct {
	__le32 a_version;
} reiserfs_acl_header;

static inline size_t reiserfs_acl_size(int count)
{
	if (count <= 4) {
		return sizeof(reiserfs_acl_header) +
		    count * sizeof(reiserfs_acl_entry_short);
	} else {
		return sizeof(reiserfs_acl_header) +
		    4 * sizeof(reiserfs_acl_entry_short) +
		    (count - 4) * sizeof(reiserfs_acl_entry);
	}
}

static inline int reiserfs_acl_count(size_t size)
{
	ssize_t s;
	size -= sizeof(reiserfs_acl_header);
	s = size - 4 * sizeof(reiserfs_acl_entry_short);
	if (s < 0) {
		if (size % sizeof(reiserfs_acl_entry_short))
			return -1;
		return size / sizeof(reiserfs_acl_entry_short);
	} else {
		if (s % sizeof(reiserfs_acl_entry))
			return -1;
		return s / sizeof(reiserfs_acl_entry) + 4;
	}
}

#ifdef CONFIG_REISERFS_FS_POSIX_ACL
struct posix_acl *reiserfs_get_acl(struct inode *inode, int type);
int reiserfs_acl_chmod(struct inode *inode);
int reiserfs_inherit_default_acl(struct inode *dir, struct dentry *dentry,
				 struct inode *inode);
int reiserfs_cache_default_acl(struct inode *dir);
extern struct xattr_handler reiserfs_posix_acl_default_handler;
extern struct xattr_handler reiserfs_posix_acl_access_handler;

static inline void reiserfs_init_acl_access(struct inode *inode)
{
	REISERFS_I(inode)->i_acl_access = NULL;
}

static inline void reiserfs_init_acl_default(struct inode *inode)
{
	REISERFS_I(inode)->i_acl_default = NULL;
}
#else

#define reiserfs_cache_default_acl(inode) 0

static inline struct posix_acl *reiserfs_get_acl(struct inode *inode, int type)
{
	return NULL;
}

static inline int reiserfs_acl_chmod(struct inode *inode)
{
	return 0;
}

static inline int
reiserfs_inherit_default_acl(const struct inode *dir, struct dentry *dentry,
			     struct inode *inode)
{
	return 0;
}

static inline void reiserfs_init_acl_access(struct inode *inode)
{
}

static inline void reiserfs_init_acl_default(struct inode *inode)
{
}
#endif
OpenPOWER on IntegriCloud