1 /* 2 * Copyright (c) 2001-2005 Silicon Graphics, Inc. 3 * All Rights Reserved. 4 * 5 * This program is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU General Public License as 7 * published by the Free Software Foundation. 8 * 9 * This program is distributed in the hope that it would be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write the Free Software Foundation, 16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 17 */ 18 #ifndef __XFS_ACL_H__ 19 #define __XFS_ACL_H__ 20 21 /* 22 * Access Control Lists 23 */ 24 typedef __uint16_t xfs_acl_perm_t; 25 typedef __int32_t xfs_acl_tag_t; 26 typedef __int32_t xfs_acl_id_t; 27 28 #define XFS_ACL_MAX_ENTRIES 25 29 #define XFS_ACL_NOT_PRESENT (-1) 30 31 typedef struct xfs_acl_entry { 32 xfs_acl_tag_t ae_tag; 33 xfs_acl_id_t ae_id; 34 xfs_acl_perm_t ae_perm; 35 } xfs_acl_entry_t; 36 37 typedef struct xfs_acl { 38 __int32_t acl_cnt; 39 xfs_acl_entry_t acl_entry[XFS_ACL_MAX_ENTRIES]; 40 } xfs_acl_t; 41 42 /* On-disk XFS extended attribute names */ 43 #define SGI_ACL_FILE "SGI_ACL_FILE" 44 #define SGI_ACL_DEFAULT "SGI_ACL_DEFAULT" 45 #define SGI_ACL_FILE_SIZE (sizeof(SGI_ACL_FILE)-1) 46 #define SGI_ACL_DEFAULT_SIZE (sizeof(SGI_ACL_DEFAULT)-1) 47 48 #define _ACL_TYPE_ACCESS 1 49 #define _ACL_TYPE_DEFAULT 2 50 51 #ifdef CONFIG_XFS_POSIX_ACL 52 53 struct vattr; 54 struct xfs_inode; 55 56 extern struct kmem_zone *xfs_acl_zone; 57 #define xfs_acl_zone_init(zone, name) \ 58 (zone) = kmem_zone_init(sizeof(xfs_acl_t), (name)) 59 #define xfs_acl_zone_destroy(zone) kmem_zone_destroy(zone) 60 61 extern int xfs_acl_inherit(struct inode *, mode_t mode, xfs_acl_t *); 62 extern int xfs_acl_iaccess(struct xfs_inode *, mode_t, cred_t *); 63 extern int xfs_acl_vtoacl(struct inode *, xfs_acl_t *, xfs_acl_t *); 64 extern int xfs_acl_vhasacl_access(struct inode *); 65 extern int xfs_acl_vhasacl_default(struct inode *); 66 extern int xfs_acl_vset(struct inode *, void *, size_t, int); 67 extern int xfs_acl_vget(struct inode *, void *, size_t, int); 68 extern int xfs_acl_vremove(struct inode *, int); 69 70 #define _ACL_PERM_INVALID(perm) ((perm) & ~(ACL_READ|ACL_WRITE|ACL_EXECUTE)) 71 72 #define _ACL_INHERIT(c,m,d) (xfs_acl_inherit(c,m,d)) 73 #define _ACL_GET_ACCESS(pv,pa) (xfs_acl_vtoacl(pv,pa,NULL) == 0) 74 #define _ACL_GET_DEFAULT(pv,pd) (xfs_acl_vtoacl(pv,NULL,pd) == 0) 75 #define _ACL_ACCESS_EXISTS xfs_acl_vhasacl_access 76 #define _ACL_DEFAULT_EXISTS xfs_acl_vhasacl_default 77 78 #define _ACL_ALLOC(a) ((a) = kmem_zone_alloc(xfs_acl_zone, KM_SLEEP)) 79 #define _ACL_FREE(a) ((a)? kmem_zone_free(xfs_acl_zone, (a)):(void)0) 80 81 #else 82 #define xfs_acl_zone_init(zone,name) 83 #define xfs_acl_zone_destroy(zone) 84 #define xfs_acl_vset(v,p,sz,t) (-EOPNOTSUPP) 85 #define xfs_acl_vget(v,p,sz,t) (-EOPNOTSUPP) 86 #define xfs_acl_vremove(v,t) (-EOPNOTSUPP) 87 #define xfs_acl_vhasacl_access(v) (0) 88 #define xfs_acl_vhasacl_default(v) (0) 89 #define _ACL_ALLOC(a) (1) /* successfully allocate nothing */ 90 #define _ACL_FREE(a) ((void)0) 91 #define _ACL_INHERIT(c,m,d) (0) 92 #define _ACL_GET_ACCESS(pv,pa) (0) 93 #define _ACL_GET_DEFAULT(pv,pd) (0) 94 #define _ACL_ACCESS_EXISTS (NULL) 95 #define _ACL_DEFAULT_EXISTS (NULL) 96 #endif 97 98 #endif /* __XFS_ACL_H__ */ 99