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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Copyright (c) 2001-2004 Silicon Graphics, Inc. All Rights Reserved.
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of version 2 of the GNU General Public License as
6 * published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it would be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
11 *
12 * Further, this software is distributed without any warranty that it is
13 * free of the rightful claim of any third person regarding infringement
14 * or the like. Any license provided herein, whether implied or
15 * otherwise, applies only to this software file. Patent licenses, if
16 * any, provided herein do not apply to combinations of this program with
17 * other software, or any other product whatsoever.
18 *
19 * You should have received a copy of the GNU General Public License along
20 * with this program; if not, write the Free Software Foundation, Inc., 59
21 * Temple Place - Suite 330, Boston MA 02111-1307, USA.
22 *
23 * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
24 * Mountain View, CA 94043, or:
25 *
26 * http://www.sgi.com
27 *
28 * For further information regarding this notice, see:
29 *
30 * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
31 */
32#ifndef __XFS_ACL_H__
33#define __XFS_ACL_H__
34
35/*
36 * Access Control Lists
37 */
38typedef __uint16_t xfs_acl_perm_t;
39typedef __int32_t xfs_acl_type_t;
40typedef __int32_t xfs_acl_tag_t;
41typedef __int32_t xfs_acl_id_t;
42
43#define XFS_ACL_MAX_ENTRIES 25
44#define XFS_ACL_NOT_PRESENT (-1)
45
46typedef struct xfs_acl_entry {
47 xfs_acl_tag_t ae_tag;
48 xfs_acl_id_t ae_id;
49 xfs_acl_perm_t ae_perm;
50} xfs_acl_entry_t;
51
52typedef struct xfs_acl {
53 __int32_t acl_cnt;
54 xfs_acl_entry_t acl_entry[XFS_ACL_MAX_ENTRIES];
55} xfs_acl_t;
56
57/* On-disk XFS extended attribute names */
58#define SGI_ACL_FILE "SGI_ACL_FILE"
59#define SGI_ACL_DEFAULT "SGI_ACL_DEFAULT"
60#define SGI_ACL_FILE_SIZE (sizeof(SGI_ACL_FILE)-1)
61#define SGI_ACL_DEFAULT_SIZE (sizeof(SGI_ACL_DEFAULT)-1)
62
63
64#ifdef CONFIG_XFS_POSIX_ACL
65
66struct vattr;
67struct vnode;
68struct xfs_inode;
69
70extern struct kmem_zone *xfs_acl_zone;
71#define xfs_acl_zone_init(zone, name) \
72 (zone) = kmem_zone_init(sizeof(xfs_acl_t), name)
73#define xfs_acl_zone_destroy(zone) kmem_cache_destroy(zone)
74
75extern int xfs_acl_inherit(struct vnode *, struct vattr *, xfs_acl_t *);
76extern int xfs_acl_iaccess(struct xfs_inode *, mode_t, cred_t *);
77extern int xfs_acl_vtoacl(struct vnode *, xfs_acl_t *, xfs_acl_t *);
78extern int xfs_acl_vhasacl_access(struct vnode *);
79extern int xfs_acl_vhasacl_default(struct vnode *);
80extern int xfs_acl_vset(struct vnode *, void *, size_t, int);
81extern int xfs_acl_vget(struct vnode *, void *, size_t, int);
82extern int xfs_acl_vremove(struct vnode *vp, int);
83
84#define _ACL_TYPE_ACCESS 1
85#define _ACL_TYPE_DEFAULT 2
86#define _ACL_PERM_INVALID(perm) ((perm) & ~(ACL_READ|ACL_WRITE|ACL_EXECUTE))
87
88#define _ACL_INHERIT(c,v,d) (xfs_acl_inherit(c,v,d))
89#define _ACL_GET_ACCESS(pv,pa) (xfs_acl_vtoacl(pv,pa,NULL) == 0)
90#define _ACL_GET_DEFAULT(pv,pd) (xfs_acl_vtoacl(pv,NULL,pd) == 0)
91#define _ACL_ACCESS_EXISTS xfs_acl_vhasacl_access
92#define _ACL_DEFAULT_EXISTS xfs_acl_vhasacl_default
93#define _ACL_XFS_IACCESS(i,m,c) (XFS_IFORK_Q(i) ? xfs_acl_iaccess(i,m,c) : -1)
94
95#define _ACL_ALLOC(a) ((a) = kmem_zone_alloc(xfs_acl_zone, KM_SLEEP))
96#define _ACL_FREE(a) ((a)? kmem_zone_free(xfs_acl_zone, (a)):(void)0)
97
98#else
99#define xfs_acl_zone_init(zone,name)
100#define xfs_acl_zone_destroy(zone)
101#define xfs_acl_vset(v,p,sz,t) (-EOPNOTSUPP)
102#define xfs_acl_vget(v,p,sz,t) (-EOPNOTSUPP)
103#define xfs_acl_vremove(v,t) (-EOPNOTSUPP)
104#define xfs_acl_vhasacl_access(v) (0)
105#define xfs_acl_vhasacl_default(v) (0)
106#define _ACL_ALLOC(a) (1) /* successfully allocate nothing */
107#define _ACL_FREE(a) ((void)0)
108#define _ACL_INHERIT(c,v,d) (0)
109#define _ACL_GET_ACCESS(pv,pa) (0)
110#define _ACL_GET_DEFAULT(pv,pd) (0)
111#define _ACL_ACCESS_EXISTS (NULL)
112#define _ACL_DEFAULT_EXISTS (NULL)
113#define _ACL_XFS_IACCESS(i,m,c) (-1)
114#endif
115
116#endif /* __XFS_ACL_H__ */