[deliverable/linux.git] / fs / xfs / xfs_acl.h

/*
 * Copyright (c) 2001-2005 Silicon Graphics, Inc.
 * All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it would be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write the Free Software Foundation,
 * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */
#ifndef __XFS_ACL_H__
#define __XFS_ACL_H__

/*
 * Access Control Lists
 */
typedef __uint16_t	xfs_acl_perm_t;
typedef __int32_t	xfs_acl_type_t;
typedef __int32_t	xfs_acl_tag_t;
typedef __int32_t	xfs_acl_id_t;

#define XFS_ACL_MAX_ENTRIES 25
#define XFS_ACL_NOT_PRESENT (-1)

typedef struct xfs_acl_entry {
	xfs_acl_tag_t	ae_tag;
	xfs_acl_id_t	ae_id;
	xfs_acl_perm_t	ae_perm;
} xfs_acl_entry_t;

typedef struct xfs_acl {
	__int32_t	acl_cnt;
	xfs_acl_entry_t	acl_entry[XFS_ACL_MAX_ENTRIES];
} xfs_acl_t;

/* On-disk XFS extended attribute names */
#define SGI_ACL_FILE	"SGI_ACL_FILE"
#define SGI_ACL_DEFAULT	"SGI_ACL_DEFAULT"
#define SGI_ACL_FILE_SIZE	(sizeof(SGI_ACL_FILE)-1)
#define SGI_ACL_DEFAULT_SIZE	(sizeof(SGI_ACL_DEFAULT)-1)


#ifdef CONFIG_XFS_POSIX_ACL

struct vattr;
struct xfs_inode;

extern struct kmem_zone *xfs_acl_zone;
#define xfs_acl_zone_init(zone, name)	\
		(zone) = kmem_zone_init(sizeof(xfs_acl_t), (name))
#define xfs_acl_zone_destroy(zone)	kmem_zone_destroy(zone)

extern int xfs_acl_inherit(bhv_vnode_t *, mode_t mode, xfs_acl_t *);
extern int xfs_acl_iaccess(struct xfs_inode *, mode_t, cred_t *);
extern int xfs_acl_vtoacl(bhv_vnode_t *, xfs_acl_t *, xfs_acl_t *);
extern int xfs_acl_vhasacl_access(bhv_vnode_t *);
extern int xfs_acl_vhasacl_default(bhv_vnode_t *);
extern int xfs_acl_vset(bhv_vnode_t *, void *, size_t, int);
extern int xfs_acl_vget(bhv_vnode_t *, void *, size_t, int);
extern int xfs_acl_vremove(bhv_vnode_t *, int);

#define _ACL_TYPE_ACCESS	1
#define _ACL_TYPE_DEFAULT	2
#define _ACL_PERM_INVALID(perm)	((perm) & ~(ACL_READ|ACL_WRITE|ACL_EXECUTE))

#define _ACL_INHERIT(c,m,d)	(xfs_acl_inherit(c,m,d))
#define _ACL_GET_ACCESS(pv,pa)	(xfs_acl_vtoacl(pv,pa,NULL) == 0)
#define _ACL_GET_DEFAULT(pv,pd)	(xfs_acl_vtoacl(pv,NULL,pd) == 0)
#define _ACL_ACCESS_EXISTS	xfs_acl_vhasacl_access
#define _ACL_DEFAULT_EXISTS	xfs_acl_vhasacl_default

#define _ACL_ALLOC(a)		((a) = kmem_zone_alloc(xfs_acl_zone, KM_SLEEP))
#define _ACL_FREE(a)		((a)? kmem_zone_free(xfs_acl_zone, (a)):(void)0)

#else
#define xfs_acl_zone_init(zone,name)
#define xfs_acl_zone_destroy(zone)
#define xfs_acl_vset(v,p,sz,t)	(-EOPNOTSUPP)
#define xfs_acl_vget(v,p,sz,t)	(-EOPNOTSUPP)
#define xfs_acl_vremove(v,t)	(-EOPNOTSUPP)
#define xfs_acl_vhasacl_access(v)	(0)
#define xfs_acl_vhasacl_default(v)	(0)
#define _ACL_ALLOC(a)		(1)	/* successfully allocate nothing */
#define _ACL_FREE(a)		((void)0)
#define _ACL_INHERIT(c,m,d)	(0)
#define _ACL_GET_ACCESS(pv,pa)	(0)
#define _ACL_GET_DEFAULT(pv,pd)	(0)
#define _ACL_ACCESS_EXISTS	(NULL)
#define _ACL_DEFAULT_EXISTS	(NULL)
#endif

#endif	/* __XFS_ACL_H__ */
Commit	Line	Data
1da177e4	1	/*
7b718769 NS	2	* Copyright (c) 2001-2005 Silicon Graphics, Inc.
7b718769 NS	3	* All Rights Reserved.
1da177e4	4	*
7b718769 NS	5	* This program is free software; you can redistribute it and/or
7b718769 NS	6	* modify it under the terms of the GNU General Public License as
1da177e4 LT	7	* published by the Free Software Foundation.
1da177e4 LT	8	*
7b718769 NS	9	* This program is distributed in the hope that it would be useful,
	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	12	* GNU General Public License for more details.
1da177e4	13	*
7b718769 NS	14	* You should have received a copy of the GNU General Public License
	15	* along with this program; if not, write the Free Software Foundation,
	16	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
1da177e4 LT	17	*/
	18	#ifndef __XFS_ACL_H__
	19	#define __XFS_ACL_H__
	20
	21	/*
	22	* Access Control Lists
	23	*/
	24	typedef __uint16_t xfs_acl_perm_t;
	25	typedef __int32_t xfs_acl_type_t;
	26	typedef __int32_t xfs_acl_tag_t;
	27	typedef __int32_t xfs_acl_id_t;
	28
	29	#define XFS_ACL_MAX_ENTRIES 25
	30	#define XFS_ACL_NOT_PRESENT (-1)
	31
	32	typedef struct xfs_acl_entry {
	33	xfs_acl_tag_t ae_tag;
	34	xfs_acl_id_t ae_id;
	35	xfs_acl_perm_t ae_perm;
	36	} xfs_acl_entry_t;
	37
	38	typedef struct xfs_acl {
	39	__int32_t acl_cnt;
	40	xfs_acl_entry_t acl_entry[XFS_ACL_MAX_ENTRIES];
	41	} xfs_acl_t;
	42
	43	/* On-disk XFS extended attribute names */
	44	#define SGI_ACL_FILE "SGI_ACL_FILE"
	45	#define SGI_ACL_DEFAULT "SGI_ACL_DEFAULT"
	46	#define SGI_ACL_FILE_SIZE (sizeof(SGI_ACL_FILE)-1)
	47	#define SGI_ACL_DEFAULT_SIZE (sizeof(SGI_ACL_DEFAULT)-1)
	48
	49
	50	#ifdef CONFIG_XFS_POSIX_ACL
	51
	52	struct vattr;
1da177e4 LT	53	struct xfs_inode;
	54
	55	extern struct kmem_zone *xfs_acl_zone;
	56	#define xfs_acl_zone_init(zone, name) \
3758dee9 NS	57	(zone) = kmem_zone_init(sizeof(xfs_acl_t), (name))
3758dee9 NS	58	#define xfs_acl_zone_destroy(zone) kmem_zone_destroy(zone)
1da177e4	59
3e5daf05	60	extern int xfs_acl_inherit(bhv_vnode_t , mode_t mode, xfs_acl_t );
1da177e4	61	extern int xfs_acl_iaccess(struct xfs_inode , mode_t, cred_t );
0a74cd19 CH	62	extern int xfs_acl_vtoacl(bhv_vnode_t , xfs_acl_t , xfs_acl_t *);
	63	extern int xfs_acl_vhasacl_access(bhv_vnode_t *);
	64	extern int xfs_acl_vhasacl_default(bhv_vnode_t *);
	65	extern int xfs_acl_vset(bhv_vnode_t , void , size_t, int);
	66	extern int xfs_acl_vget(bhv_vnode_t , void , size_t, int);
	67	extern int xfs_acl_vremove(bhv_vnode_t *, int);
1da177e4 LT	68
	69	#define _ACL_TYPE_ACCESS 1
	70	#define _ACL_TYPE_DEFAULT 2
	71	#define _ACL_PERM_INVALID(perm) ((perm) & ~(ACL_READ\|ACL_WRITE\|ACL_EXECUTE))
	72
3e5daf05	73	#define _ACL_INHERIT(c,m,d) (xfs_acl_inherit(c,m,d))
1da177e4 LT	74	#define _ACL_GET_ACCESS(pv,pa) (xfs_acl_vtoacl(pv,pa,NULL) == 0)
	75	#define _ACL_GET_DEFAULT(pv,pd) (xfs_acl_vtoacl(pv,NULL,pd) == 0)
	76	#define _ACL_ACCESS_EXISTS xfs_acl_vhasacl_access
	77	#define _ACL_DEFAULT_EXISTS xfs_acl_vhasacl_default
1da177e4 LT	78
	79	#define _ACL_ALLOC(a) ((a) = kmem_zone_alloc(xfs_acl_zone, KM_SLEEP))
	80	#define _ACL_FREE(a) ((a)? kmem_zone_free(xfs_acl_zone, (a)):(void)0)
	81
	82	#else
	83	#define xfs_acl_zone_init(zone,name)
	84	#define xfs_acl_zone_destroy(zone)
	85	#define xfs_acl_vset(v,p,sz,t) (-EOPNOTSUPP)
	86	#define xfs_acl_vget(v,p,sz,t) (-EOPNOTSUPP)
	87	#define xfs_acl_vremove(v,t) (-EOPNOTSUPP)
	88	#define xfs_acl_vhasacl_access(v) (0)
	89	#define xfs_acl_vhasacl_default(v) (0)
	90	#define _ACL_ALLOC(a) (1) /* successfully allocate nothing */
	91	#define _ACL_FREE(a) ((void)0)
3e5daf05	92	#define _ACL_INHERIT(c,m,d) (0)
1da177e4 LT	93	#define _ACL_GET_ACCESS(pv,pa) (0)
	94	#define _ACL_GET_DEFAULT(pv,pd) (0)
	95	#define _ACL_ACCESS_EXISTS (NULL)
	96	#define _ACL_DEFAULT_EXISTS (NULL)
1da177e4 LT	97	#endif
	98
	99	#endif /* __XFS_ACL_H__ */