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reiserfs: constify xattr_handler
[net-next-2.6.git] / include / linux / reiserfs_acl.h
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1#include <linux/init.h>
2#include <linux/posix_acl.h>
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3
4#define REISERFS_ACL_VERSION 0x0001
5
6typedef struct {
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7 __le16 e_tag;
8 __le16 e_perm;
9 __le32 e_id;
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10} reiserfs_acl_entry;
11
12typedef struct {
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13 __le16 e_tag;
14 __le16 e_perm;
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15} reiserfs_acl_entry_short;
16
17typedef struct {
bd4c625c 18 __le32 a_version;
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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) +
bd4c625c 25 count * sizeof(reiserfs_acl_entry_short);
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26 } else {
27 return sizeof(reiserfs_acl_header) +
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28 4 * sizeof(reiserfs_acl_entry_short) +
29 (count - 4) * sizeof(reiserfs_acl_entry);
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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
1da177e4 49#ifdef CONFIG_REISERFS_FS_POSIX_ACL
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50struct posix_acl *reiserfs_get_acl(struct inode *inode, int type);
51int reiserfs_acl_chmod(struct inode *inode);
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52int reiserfs_inherit_default_acl(struct reiserfs_transaction_handle *th,
53 struct inode *dir, struct dentry *dentry,
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54 struct inode *inode);
55int reiserfs_cache_default_acl(struct inode *dir);
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56extern const struct xattr_handler reiserfs_posix_acl_default_handler;
57extern const struct xattr_handler reiserfs_posix_acl_access_handler;
cfe14677 58
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59#else
60
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61#define reiserfs_cache_default_acl(inode) 0
62
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63static inline struct posix_acl *reiserfs_get_acl(struct inode *inode, int type)
64{
65 return NULL;
66}
67
bd4c625c 68static inline int reiserfs_acl_chmod(struct inode *inode)
1da177e4 69{
bd4c625c 70 return 0;
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71}
72
73static inline int
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74reiserfs_inherit_default_acl(struct reiserfs_transaction_handle *th,
75 const struct inode *dir, struct dentry *dentry,
bd4c625c 76 struct inode *inode)
1da177e4 77{
bd4c625c 78 return 0;
1da177e4 79}
1da177e4 80#endif