168 lines
4.3 KiB
C
168 lines
4.3 KiB
C
/* 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 mnt_idmap *, 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 mnt_idmap *, 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);
|
|
int posix_acl_listxattr(struct inode *inode, char **buffer,
|
|
ssize_t *remaining_size);
|
|
#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;
|
|
}
|
|
static inline int posix_acl_listxattr(struct inode *inode, char **buffer,
|
|
ssize_t *remaining_size)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif /* CONFIG_FS_POSIX_ACL */
|
|
|
|
struct posix_acl *get_inode_acl(struct inode *inode, int type);
|
|
|
|
#endif /* __LINUX_POSIX_ACL_H */
|