fs/xfs/xfs_acl.h

   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 struct inode;
  22 struct posix_acl;
  23 struct xfs_inode;
  24
  25 #define XFS_ACL_MAX_ENTRIES 25
  26 #define XFS_ACL_NOT_PRESENT (-1)
  27
  28 /* On-disk XFS access control list structure */
  29 struct xfs_acl {
  30         __be32          acl_cnt;
  31         struct xfs_acl_entry {
  32                 __be32  ae_tag;
  33                 __be32  ae_id;
  34                 __be16  ae_perm;
  35         } acl_entry[XFS_ACL_MAX_ENTRIES];
  36 };
  37
  38 /* On-disk XFS extended attribute names */
  39 #define SGI_ACL_FILE            (unsigned char *)"SGI_ACL_FILE"
  40 #define SGI_ACL_DEFAULT         (unsigned char *)"SGI_ACL_DEFAULT"
  41 #define SGI_ACL_FILE_SIZE       (sizeof(SGI_ACL_FILE)-1)
  42 #define SGI_ACL_DEFAULT_SIZE    (sizeof(SGI_ACL_DEFAULT)-1)
  43
  44 #ifdef CONFIG_XFS_POSIX_ACL
  45 extern struct posix_acl *xfs_get_acl(struct inode *inode, int type);
  46 extern int xfs_inherit_acl(struct inode *inode, struct posix_acl *default_acl);
  47 extern int xfs_acl_chmod(struct inode *inode);
  48 extern int posix_acl_access_exists(struct inode *inode);
  49 extern int posix_acl_default_exists(struct inode *inode);
  50
  51 extern const struct xattr_handler xfs_xattr_acl_access_handler;
  52 extern const struct xattr_handler xfs_xattr_acl_default_handler;
  53 #else
  54 static inline struct posix_acl *xfs_get_acl(struct inode *inode, int type)
  55 {
  56         return NULL;
  57 }
  58 # define xfs_inherit_acl(inode, default_acl)            0
  59 # define xfs_acl_chmod(inode)                           0
  60 # define posix_acl_access_exists(inode)                 0
  61 # define posix_acl_default_exists(inode)                0
  62 #endif /* CONFIG_XFS_POSIX_ACL */
  63 #endif  /* __XFS_ACL_H__ */