mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-29 23:53:32 +00:00
0a8aa19397
The limit of 25 ACL entries is arbitrary, but baked into the on-disk
format. For version 5 superblocks, increase it to the maximum nuber
of ACLs that can fit into a single xattr.
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Mark Tinguely <tinuguely@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
(cherry picked from commit 5c87d4bc1a)
80 lines
2.6 KiB
C
80 lines
2.6 KiB
C
/*
|
|
* Copyright (c) 2001-2005 Silicon Graphics, Inc.
|
|
* All Rights Reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it would be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write the Free Software Foundation,
|
|
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
#ifndef __XFS_ACL_H__
|
|
#define __XFS_ACL_H__
|
|
|
|
struct inode;
|
|
struct posix_acl;
|
|
struct xfs_inode;
|
|
|
|
#define XFS_ACL_NOT_PRESENT (-1)
|
|
|
|
/* On-disk XFS access control list structure */
|
|
struct xfs_acl_entry {
|
|
__be32 ae_tag;
|
|
__be32 ae_id;
|
|
__be16 ae_perm;
|
|
__be16 ae_pad; /* fill the implicit hole in the structure */
|
|
};
|
|
|
|
struct xfs_acl {
|
|
__be32 acl_cnt;
|
|
struct xfs_acl_entry acl_entry[0];
|
|
};
|
|
|
|
/*
|
|
* The number of ACL entries allowed is defined by the on-disk format.
|
|
* For v4 superblocks, that is limited to 25 entries. For v5 superblocks, it is
|
|
* limited only by the maximum size of the xattr that stores the information.
|
|
*/
|
|
#define XFS_ACL_MAX_ENTRIES(mp) \
|
|
(xfs_sb_version_hascrc(&mp->m_sb) \
|
|
? (XATTR_SIZE_MAX - sizeof(struct xfs_acl)) / \
|
|
sizeof(struct xfs_acl_entry) \
|
|
: 25)
|
|
|
|
#define XFS_ACL_MAX_SIZE(mp) \
|
|
(sizeof(struct xfs_acl) + \
|
|
sizeof(struct xfs_acl_entry) * XFS_ACL_MAX_ENTRIES((mp)))
|
|
|
|
/* On-disk XFS extended attribute names */
|
|
#define SGI_ACL_FILE (unsigned char *)"SGI_ACL_FILE"
|
|
#define SGI_ACL_DEFAULT (unsigned char *)"SGI_ACL_DEFAULT"
|
|
#define SGI_ACL_FILE_SIZE (sizeof(SGI_ACL_FILE)-1)
|
|
#define SGI_ACL_DEFAULT_SIZE (sizeof(SGI_ACL_DEFAULT)-1)
|
|
|
|
#ifdef CONFIG_XFS_POSIX_ACL
|
|
extern struct posix_acl *xfs_get_acl(struct inode *inode, int type);
|
|
extern int xfs_inherit_acl(struct inode *inode, struct posix_acl *default_acl);
|
|
extern int xfs_acl_chmod(struct inode *inode);
|
|
extern int posix_acl_access_exists(struct inode *inode);
|
|
extern int posix_acl_default_exists(struct inode *inode);
|
|
|
|
extern const struct xattr_handler xfs_xattr_acl_access_handler;
|
|
extern const struct xattr_handler xfs_xattr_acl_default_handler;
|
|
#else
|
|
static inline struct posix_acl *xfs_get_acl(struct inode *inode, int type)
|
|
{
|
|
return NULL;
|
|
}
|
|
# define xfs_inherit_acl(inode, default_acl) 0
|
|
# define xfs_acl_chmod(inode) 0
|
|
# define posix_acl_access_exists(inode) 0
|
|
# define posix_acl_default_exists(inode) 0
|
|
#endif /* CONFIG_XFS_POSIX_ACL */
|
|
#endif /* __XFS_ACL_H__ */
|