1 /* SPDX-License-Identifier: GPL-2.0 */
2 #include <linux/init.h>
3 #include <linux/posix_acl.h>
4
5 #define REISERFS_ACL_VERSION 0x0001
6
7 typedef struct {
8 __le16 e_tag;
9 __le16 e_perm;
10 __le32 e_id;
11 } reiserfs_acl_entry;
12
13 typedef struct {
14 __le16 e_tag;
15 __le16 e_perm;
16 } reiserfs_acl_entry_short;
17
18 typedef struct {
19 __le32 a_version;
20 } reiserfs_acl_header;
21
reiserfs_acl_size(int count)22 static 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
reiserfs_acl_count(size_t size)34 static 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
51 struct posix_acl *reiserfs_get_acl(struct inode *inode, int type, bool rcu);
52 int reiserfs_set_acl(struct mnt_idmap *idmap, struct dentry *dentry,
53 struct posix_acl *acl, int type);
54 int reiserfs_acl_chmod(struct dentry *dentry);
55 int reiserfs_inherit_default_acl(struct reiserfs_transaction_handle *th,
56 struct inode *dir, struct dentry *dentry,
57 struct inode *inode);
58 int 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
reiserfs_acl_chmod(struct dentry * dentry)66 static inline int reiserfs_acl_chmod(struct dentry *dentry)
67 {
68 return 0;
69 }
70
71 static inline int
reiserfs_inherit_default_acl(struct reiserfs_transaction_handle * th,const struct inode * dir,struct dentry * dentry,struct inode * inode)72 reiserfs_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