87 lines
2 KiB
C
87 lines
2 KiB
C
|
/*
|
||
|
|
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/slab.h>
|
||
|
|
|
||
|
|
#define ACL_UNDEFINED_ID (-1)
|
||
|
|
|
||
|
|
/* a_type field in acl_user_posix_entry_t */
|
||
|
|
#define ACL_TYPE_ACCESS (0x8000)
|
||
|
|
#define ACL_TYPE_DEFAULT (0x4000)
|
||
|
|
|
||
|
|
/* e_tag entry in struct posix_acl_entry */
|
||
|
|
#define ACL_USER_OBJ (0x01)
|
||
|
|
#define ACL_USER (0x02)
|
||
|
|
#define ACL_GROUP_OBJ (0x04)
|
||
|
|
#define ACL_GROUP (0x08)
|
||
|
|
#define ACL_MASK (0x10)
|
||
|
|
#define ACL_OTHER (0x20)
|
||
|
|
|
||
|
|
/* permissions in the e_perm field */
|
||
|
|
#define ACL_READ (0x04)
|
||
|
|
#define ACL_WRITE (0x02)
|
||
|
|
#define ACL_EXECUTE (0x01)
|
||
|
|
//#define ACL_ADD (0x08)
|
||
|
|
//#define ACL_DELETE (0x10)
|
||
|
|
|
||
|
|
struct posix_acl_entry {
|
||
|
|
short e_tag;
|
||
|
|
unsigned short e_perm;
|
||
|
|
unsigned int e_id;
|
||
|
|
};
|
||
|
|
|
||
|
|
struct posix_acl {
|
||
|
|
atomic_t a_refcount;
|
||
|
|
unsigned int a_count;
|
||
|
|
struct posix_acl_entry a_entries[0];
|
||
|
|
};
|
||
|
|
|
||
|
|
#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)
|
||
|
|
atomic_inc(&acl->a_refcount);
|
||
|
|
return acl;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Free an ACL handle.
|
||
|
|
*/
|
||
|
|
static inline void
|
||
|
|
posix_acl_release(struct posix_acl *acl)
|
||
|
|
{
|
||
|
|
if (acl && atomic_dec_and_test(&acl->a_refcount))
|
||
|
|
kfree(acl);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/* posix_acl.c */
|
||
|
|
|
||
|
|
extern struct posix_acl *posix_acl_alloc(int, unsigned int __nocast);
|
||
|
|
extern struct posix_acl *posix_acl_clone(const struct posix_acl *, unsigned int __nocast);
|
||
|
|
extern int posix_acl_valid(const struct posix_acl *);
|
||
|
|
extern int posix_acl_permission(struct inode *, const struct posix_acl *, int);
|
||
|
|
extern struct posix_acl *posix_acl_from_mode(mode_t, unsigned int __nocast);
|
||
|
|
extern int posix_acl_equiv_mode(const struct posix_acl *, mode_t *);
|
||
|
|
extern int posix_acl_create_masq(struct posix_acl *, mode_t *);
|
||
|
|
extern int posix_acl_chmod_masq(struct posix_acl *, mode_t);
|
||
|
|
|
||
|
|
extern struct posix_acl *get_posix_acl(struct inode *, int);
|
||
|
|
extern int set_posix_acl(struct inode *, int, struct posix_acl *);
|
||
|
|
|
||
|
|
#endif /* __LINUX_POSIX_ACL_H */
|