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__ */ 117