Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 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__ */ |