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1da177e4 LT |
1 | /* |
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 | */ | |
38 | typedef __uint16_t xfs_acl_perm_t; | |
39 | typedef __int32_t xfs_acl_type_t; | |
40 | typedef __int32_t xfs_acl_tag_t; | |
41 | typedef __int32_t xfs_acl_id_t; | |
42 | ||
43 | #define XFS_ACL_MAX_ENTRIES 25 | |
44 | #define XFS_ACL_NOT_PRESENT (-1) | |
45 | ||
46 | typedef 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 | ||
52 | typedef 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 | ||
66 | struct vattr; | |
67 | struct vnode; | |
68 | struct xfs_inode; | |
69 | ||
70 | extern 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 | ||
75 | extern int xfs_acl_inherit(struct vnode *, struct vattr *, xfs_acl_t *); | |
76 | extern int xfs_acl_iaccess(struct xfs_inode *, mode_t, cred_t *); | |
77 | extern int xfs_acl_vtoacl(struct vnode *, xfs_acl_t *, xfs_acl_t *); | |
78 | extern int xfs_acl_vhasacl_access(struct vnode *); | |
79 | extern int xfs_acl_vhasacl_default(struct vnode *); | |
80 | extern int xfs_acl_vset(struct vnode *, void *, size_t, int); | |
81 | extern int xfs_acl_vget(struct vnode *, void *, size_t, int); | |
82 | extern 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__ */ |