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/*

 * Copyright (c) 2001-2003 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 __KERNEL__

#ifdef CONFIG_XFS_POSIX_ACL

struct vattr;

struct vnode;

struct xfs_inode;

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_get(struct vnode *, xfs_acl_t *, xfs_acl_t *);

extern int xfs_acl_set(struct vnode *, xfs_acl_t *, xfs_acl_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);

extern struct kmem_zone *xfs_acl_zone;

#define _ACL_TYPE_ACCESS        1

#define _ACL_TYPE_DEFAULT       2

#define _ACL_PERM_INVALID(perm) ((perm) & ~(ACL_READ|ACL_WRITE|ACL_EXECUTE))

#define _ACL_DECL(a)            xfs_acl_t *(a) = NULL

#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)) : 0)

#define _ACL_ZONE_INIT(z,name)  ((z) = kmem_zone_init(sizeof(xfs_acl_t), name))

#define _ACL_ZONE_DESTROY(z)    (kmem_cache_destroy(z))

#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)

#else

#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_DECL(a)            ((void)0)

#define _ACL_ALLOC(a)           (1)     /* successfully allocate nothing */

#define _ACL_FREE(a)            ((void)0)

#define _ACL_ZONE_INIT(z,name)  ((void)0)

#define _ACL_ZONE_DESTROY(z)    ((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  /* __KERNEL__ */

#endif  /* __XFS_ACL_H__ */