1 /*
2 * Copyright (c) 2000-2001,2005 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_DIR2_H__
19 #define __XFS_DIR2_H__
20
21 struct uio;
22 struct xfs_dabuf;
23 struct xfs_da_args;
24 struct xfs_dir2_put_args;
25 struct xfs_bmap_free;
26 struct xfs_inode;
27 struct xfs_mount;
28 struct xfs_trans;
29
30 /*
31 * Directory version 2.
32 * There are 4 possible formats:
33 * shortform
34 * single block - data with embedded leaf at the end
35 * multiple data blocks, single leaf+freeindex block
36 * data blocks, node&leaf blocks (btree), freeindex blocks
37 *
38 * The shortform format is in xfs_dir2_sf.h.
39 * The single block format is in xfs_dir2_block.h.
40 * The data block format is in xfs_dir2_data.h.
41 * The leaf and freeindex block formats are in xfs_dir2_leaf.h.
42 * Node blocks are the same as the other version, in xfs_da_btree.h.
43 */
44
45 /*
46 * Byte offset in data block and shortform entry.
47 */
48 typedef __uint16_t xfs_dir2_data_off_t;
49 #define NULLDATAOFF 0xffffU
50 typedef uint xfs_dir2_data_aoff_t; /* argument form */
51
52 /*
53 * Directory block number (logical dirblk in file)
54 */
55 typedef __uint32_t xfs_dir2_db_t;
56
57 /*
58 * Byte offset in a directory.
59 */
60 typedef xfs_off_t xfs_dir2_off_t;
61
62 /*
63 * Generic directory interface routines
64 */
65 extern void xfs_dir_startup(void);
66 extern void xfs_dir_mount(struct xfs_mount *mp);
67 extern int xfs_dir_isempty(struct xfs_inode *dp);
68 extern int xfs_dir_init(struct xfs_trans *tp, struct xfs_inode *dp,
69 struct xfs_inode *pdp);
70 extern int xfs_dir_createname(struct xfs_trans *tp, struct xfs_inode *dp,
71 char *name, int namelen, xfs_ino_t inum,
72 xfs_fsblock_t *first,
73 struct xfs_bmap_free *flist, xfs_extlen_t tot);
74 extern int xfs_dir_lookup(struct xfs_trans *tp, struct xfs_inode *dp,
75 char *name, int namelen, xfs_ino_t *inum);
76 extern int xfs_dir_removename(struct xfs_trans *tp, struct xfs_inode *dp,
77 char *name, int namelen, xfs_ino_t ino,
78 xfs_fsblock_t *first,
79 struct xfs_bmap_free *flist, xfs_extlen_t tot);
80 extern int xfs_dir_replace(struct xfs_trans *tp, struct xfs_inode *dp,
81 char *name, int namelen, xfs_ino_t inum,
82 xfs_fsblock_t *first,
83 struct xfs_bmap_free *flist, xfs_extlen_t tot);
84 extern int xfs_dir_canenter(struct xfs_trans *tp, struct xfs_inode *dp,
85 char *name, int namelen);
86 extern int xfs_dir_ino_validate(struct xfs_mount *mp, xfs_ino_t ino);
87
88 /*
89 * Utility routines for v2 directories.
90 */
91 extern int xfs_dir2_grow_inode(struct xfs_da_args *args, int space,
92 xfs_dir2_db_t *dbp);
93 extern int xfs_dir2_isblock(struct xfs_trans *tp, struct xfs_inode *dp,
94 int *vp);
95 extern int xfs_dir2_isleaf(struct xfs_trans *tp, struct xfs_inode *dp,
96 int *vp);
97 extern int xfs_dir2_shrink_inode(struct xfs_da_args *args, xfs_dir2_db_t db,
98 struct xfs_dabuf *bp);
99
100 #endif /* __XFS_DIR2_H__ */
101
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