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
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
|
/* SPDX-License-Identifier: GPL-2.0 */
/*
File: linux/posix_acl.h
(C) 2002 Andreas Gruenbacher, <a.gruenbacher@computer.org>
*/
#ifndef __LINUX_POSIX_ACL_H
#define __LINUX_POSIX_ACL_H
#include <linux/bug.h>
#include <linux/slab.h>
#include <linux/rcupdate.h>
#include <linux/refcount.h>
#include <uapi/linux/posix_acl.h>
struct user_namespace;
struct posix_acl_entry {
short e_tag;
unsigned short e_perm;
union {
kuid_t e_uid;
kgid_t e_gid;
};
};
struct posix_acl {
refcount_t a_refcount;
struct rcu_head a_rcu;
unsigned int a_count;
struct posix_acl_entry a_entries[];
};
#define FOREACH_ACL_ENTRY(pa, acl, pe) \
for(pa=(acl)->a_entries, pe=pa+(acl)->a_count; pa<pe; pa++)
/*
* Duplicate an ACL handle.
*/
static inline struct posix_acl *
posix_acl_dup(struct posix_acl *acl)
{
if (acl)
refcount_inc(&acl->a_refcount);
return acl;
}
/*
* Free an ACL handle.
*/
static inline void
posix_acl_release(struct posix_acl *acl)
{
if (acl && refcount_dec_and_test(&acl->a_refcount))
kfree_rcu(acl, a_rcu);
}
/* posix_acl.c */
extern void posix_acl_init(struct posix_acl *, int);
extern struct posix_acl *posix_acl_alloc(int, gfp_t);
extern struct posix_acl *posix_acl_from_mode(umode_t, gfp_t);
extern int posix_acl_equiv_mode(const struct posix_acl *, umode_t *);
extern int __posix_acl_create(struct posix_acl **, gfp_t, umode_t *);
extern int __posix_acl_chmod(struct posix_acl **, gfp_t, umode_t);
extern struct posix_acl *get_posix_acl(struct inode *, int);
int set_posix_acl(struct mnt_idmap *, struct dentry *, int,
struct posix_acl *);
struct posix_acl *get_cached_acl_rcu(struct inode *inode, int type);
struct posix_acl *posix_acl_clone(const struct posix_acl *acl, gfp_t flags);
#ifdef CONFIG_FS_POSIX_ACL
int posix_acl_chmod(struct mnt_idmap *, struct dentry *, umode_t);
extern int posix_acl_create(struct inode *, umode_t *, struct posix_acl **,
struct posix_acl **);
int posix_acl_update_mode(struct user_namespace *, struct inode *, umode_t *,
struct posix_acl **);
int simple_set_acl(struct mnt_idmap *, struct dentry *,
struct posix_acl *, int);
extern int simple_acl_create(struct inode *, struct inode *);
struct posix_acl *get_cached_acl(struct inode *inode, int type);
void set_cached_acl(struct inode *inode, int type, struct posix_acl *acl);
void forget_cached_acl(struct inode *inode, int type);
void forget_all_cached_acls(struct inode *inode);
int posix_acl_valid(struct user_namespace *, const struct posix_acl *);
int posix_acl_permission(struct user_namespace *, struct inode *,
const struct posix_acl *, int);
static inline void cache_no_acl(struct inode *inode)
{
inode->i_acl = NULL;
inode->i_default_acl = NULL;
}
int vfs_set_acl(struct mnt_idmap *idmap, struct dentry *dentry,
const char *acl_name, struct posix_acl *kacl);
struct posix_acl *vfs_get_acl(struct mnt_idmap *idmap,
struct dentry *dentry, const char *acl_name);
int vfs_remove_acl(struct mnt_idmap *idmap, struct dentry *dentry,
const char *acl_name);
#else
static inline int posix_acl_chmod(struct mnt_idmap *idmap,
struct dentry *dentry, umode_t mode)
{
return 0;
}
#define simple_set_acl NULL
static inline int simple_acl_create(struct inode *dir, struct inode *inode)
{
return 0;
}
static inline void cache_no_acl(struct inode *inode)
{
}
static inline int posix_acl_create(struct inode *inode, umode_t *mode,
struct posix_acl **default_acl, struct posix_acl **acl)
{
*default_acl = *acl = NULL;
return 0;
}
static inline void forget_all_cached_acls(struct inode *inode)
{
}
static inline int vfs_set_acl(struct mnt_idmap *idmap,
struct dentry *dentry, const char *name,
struct posix_acl *acl)
{
return -EOPNOTSUPP;
}
static inline struct posix_acl *vfs_get_acl(struct mnt_idmap *idmap,
struct dentry *dentry,
const char *acl_name)
{
return ERR_PTR(-EOPNOTSUPP);
}
static inline int vfs_remove_acl(struct mnt_idmap *idmap,
struct dentry *dentry, const char *acl_name)
{
return -EOPNOTSUPP;
}
#endif /* CONFIG_FS_POSIX_ACL */
struct posix_acl *get_inode_acl(struct inode *inode, int type);
#endif /* __LINUX_POSIX_ACL_H */
|
