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1da177e4 | 1 | /* |
7b718769 NS |
2 | * Copyright (c) 2001-2005 Silicon Graphics, Inc. |
3 | * All Rights Reserved. | |
1da177e4 | 4 | * |
7b718769 NS |
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 | |
1da177e4 LT |
7 | * published by the Free Software Foundation. |
8 | * | |
7b718769 NS |
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. | |
1da177e4 | 13 | * |
7b718769 NS |
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 | |
1da177e4 LT |
17 | */ |
18 | #ifndef __XFS_ACL_H__ | |
19 | #define __XFS_ACL_H__ | |
20 | ||
ef14f0c1 CH |
21 | struct inode; |
22 | struct posix_acl; | |
23 | struct xfs_inode; | |
1da177e4 | 24 | |
1da177e4 LT |
25 | #define XFS_ACL_NOT_PRESENT (-1) |
26 | ||
ef14f0c1 | 27 | /* On-disk XFS access control list structure */ |
0a8aa193 DC |
28 | struct xfs_acl_entry { |
29 | __be32 ae_tag; | |
30 | __be32 ae_id; | |
31 | __be16 ae_perm; | |
32 | __be16 ae_pad; /* fill the implicit hole in the structure */ | |
33 | }; | |
34 | ||
ef14f0c1 | 35 | struct xfs_acl { |
0a8aa193 DC |
36 | __be32 acl_cnt; |
37 | struct xfs_acl_entry acl_entry[0]; | |
ef14f0c1 | 38 | }; |
1da177e4 | 39 | |
0a8aa193 DC |
40 | /* |
41 | * The number of ACL entries allowed is defined by the on-disk format. | |
42 | * For v4 superblocks, that is limited to 25 entries. For v5 superblocks, it is | |
43 | * limited only by the maximum size of the xattr that stores the information. | |
44 | */ | |
45 | #define XFS_ACL_MAX_ENTRIES(mp) \ | |
46 | (xfs_sb_version_hascrc(&mp->m_sb) \ | |
47 | ? (XATTR_SIZE_MAX - sizeof(struct xfs_acl)) / \ | |
48 | sizeof(struct xfs_acl_entry) \ | |
49 | : 25) | |
50 | ||
51 | #define XFS_ACL_MAX_SIZE(mp) \ | |
52 | (sizeof(struct xfs_acl) + \ | |
53 | sizeof(struct xfs_acl_entry) * XFS_ACL_MAX_ENTRIES((mp))) | |
54 | ||
1da177e4 | 55 | /* On-disk XFS extended attribute names */ |
a9273ca5 DC |
56 | #define SGI_ACL_FILE (unsigned char *)"SGI_ACL_FILE" |
57 | #define SGI_ACL_DEFAULT (unsigned char *)"SGI_ACL_DEFAULT" | |
1da177e4 LT |
58 | #define SGI_ACL_FILE_SIZE (sizeof(SGI_ACL_FILE)-1) |
59 | #define SGI_ACL_DEFAULT_SIZE (sizeof(SGI_ACL_DEFAULT)-1) | |
60 | ||
1da177e4 | 61 | #ifdef CONFIG_XFS_POSIX_ACL |
ef14f0c1 CH |
62 | extern struct posix_acl *xfs_get_acl(struct inode *inode, int type); |
63 | extern int xfs_inherit_acl(struct inode *inode, struct posix_acl *default_acl); | |
64 | extern int xfs_acl_chmod(struct inode *inode); | |
ef14f0c1 CH |
65 | extern int posix_acl_access_exists(struct inode *inode); |
66 | extern int posix_acl_default_exists(struct inode *inode); | |
1da177e4 | 67 | |
46e58764 SH |
68 | extern const struct xattr_handler xfs_xattr_acl_access_handler; |
69 | extern const struct xattr_handler xfs_xattr_acl_default_handler; | |
1da177e4 | 70 | #else |
a5a7bbcc MT |
71 | static inline struct posix_acl *xfs_get_acl(struct inode *inode, int type) |
72 | { | |
73 | return NULL; | |
74 | } | |
ef14f0c1 CH |
75 | # define xfs_inherit_acl(inode, default_acl) 0 |
76 | # define xfs_acl_chmod(inode) 0 | |
ef14f0c1 CH |
77 | # define posix_acl_access_exists(inode) 0 |
78 | # define posix_acl_default_exists(inode) 0 | |
79 | #endif /* CONFIG_XFS_POSIX_ACL */ | |
1da177e4 | 80 | #endif /* __XFS_ACL_H__ */ |