/*
* Copyright (c) 2001-2004 Silicon Graphics, Inc. All Rights Reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2 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.
*
* Further, this software is distributed without any warranty that it is
* free of the rightful claim of any third person regarding infringement
* or the like. Any license provided herein, whether implied or
* otherwise, applies only to this software file. Patent licenses, if
* any, provided herein do not apply to combinations of this program with
* other software, or any other product whatsoever.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write the Free Software Foundation, Inc., 59
* Temple Place - Suite 330, Boston MA 02111-1307, USA.
*
* Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
* Mountain View, CA 94043, or:
*
* http://www.sgi.com
*
* For further information regarding this notice, see:
*
* http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
*/
#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 vnode;
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_cache_destroy(zone)
extern int xfs_acl_inherit(struct vnode *, struct vattr *, xfs_acl_t *);
extern int xfs_acl_iaccess(struct xfs_inode *, mode_t, cred_t *);
extern int xfs_acl_vtoacl(struct vnode *, xfs_acl_t *, xfs_acl_t *);
extern int xfs_acl_vhasacl_access(struct vnode *);
extern int xfs_acl_vhasacl_default(struct vnode *);
extern int xfs_acl_vset(struct vnode *, void *, size_t, int);
extern int xfs_acl_vget(struct vnode *, void *, size_t, int);
extern int xfs_acl_vremove(struct vnode *vp, 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,v,d) (xfs_acl_inherit(c,v,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_XFS_IACCESS(i,m,c) (XFS_IFORK_Q(i) ? xfs_acl_iaccess(i,m,c) : -1)
#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,v,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)
#define _ACL_XFS_IACCESS(i,m,c) (-1)
#endif
#endif /* __XFS_ACL_H__ */
