2 File: linux/posix_acl.h
4 (C) 2002 Andreas Gruenbacher, <a.gruenbacher@computer.org>
8 #ifndef __LINUX_POSIX_ACL_H
9 #define __LINUX_POSIX_ACL_H
11 #include <linux/bug.h>
12 #include <linux/slab.h>
13 #include <linux/rcupdate.h>
14 #include <uapi/linux/posix_acl.h>
16 struct posix_acl_entry
{
18 unsigned short e_perm
;
27 struct rcu_head a_rcu
;
29 struct posix_acl_entry a_entries
[0];
32 #define FOREACH_ACL_ENTRY(pa, acl, pe) \
33 for(pa=(acl)->a_entries, pe=pa+(acl)->a_count; pa<pe; pa++)
37 * Duplicate an ACL handle.
39 static inline struct posix_acl
*
40 posix_acl_dup(struct posix_acl
*acl
)
43 atomic_inc(&acl
->a_refcount
);
51 posix_acl_release(struct posix_acl
*acl
)
53 if (acl
&& atomic_dec_and_test(&acl
->a_refcount
))
54 kfree_rcu(acl
, a_rcu
);
60 extern void posix_acl_init(struct posix_acl
*, int);
61 extern struct posix_acl
*posix_acl_alloc(int, gfp_t
);
62 extern int posix_acl_valid(struct user_namespace
*, const struct posix_acl
*);
63 extern int posix_acl_permission(struct inode
*, const struct posix_acl
*, int);
64 extern struct posix_acl
*posix_acl_from_mode(umode_t
, gfp_t
);
65 extern int posix_acl_equiv_mode(const struct posix_acl
*, umode_t
*);
66 extern int __posix_acl_create(struct posix_acl
**, gfp_t
, umode_t
*);
67 extern int __posix_acl_chmod(struct posix_acl
**, gfp_t
, umode_t
);
69 extern struct posix_acl
*get_posix_acl(struct inode
*, int);
70 extern int set_posix_acl(struct inode
*, int, struct posix_acl
*);
72 #ifdef CONFIG_FS_POSIX_ACL
73 extern int posix_acl_chmod(struct inode
*, umode_t
);
74 extern int posix_acl_create(struct inode
*, umode_t
*, struct posix_acl
**,
76 extern int posix_acl_update_mode(struct inode
*, umode_t
*, struct posix_acl
**);
78 extern int simple_set_acl(struct inode
*, struct posix_acl
*, int);
79 extern int simple_acl_create(struct inode
*, struct inode
*);
81 struct posix_acl
*get_cached_acl(struct inode
*inode
, int type
);
82 struct posix_acl
*get_cached_acl_rcu(struct inode
*inode
, int type
);
83 void set_cached_acl(struct inode
*inode
, int type
, struct posix_acl
*acl
);
84 void forget_cached_acl(struct inode
*inode
, int type
);
85 void forget_all_cached_acls(struct inode
*inode
);
87 static inline void cache_no_acl(struct inode
*inode
)
90 inode
->i_default_acl
= NULL
;
93 static inline int posix_acl_chmod(struct inode
*inode
, umode_t mode
)
98 #define simple_set_acl NULL
100 static inline int simple_acl_create(struct inode
*dir
, struct inode
*inode
)
104 static inline void cache_no_acl(struct inode
*inode
)
108 static inline int posix_acl_create(struct inode
*inode
, umode_t
*mode
,
109 struct posix_acl
**default_acl
, struct posix_acl
**acl
)
111 *default_acl
= *acl
= NULL
;
115 static inline void forget_all_cached_acls(struct inode
*inode
)
118 #endif /* CONFIG_FS_POSIX_ACL */
120 struct posix_acl
*get_acl(struct inode
*inode
, int type
);
122 #endif /* __LINUX_POSIX_ACL_H */