blob: 5a578b84e2466c71a7f6c2b91d5bd131b4d16a22 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Copyright (c) 2000-2001 Silicon Graphics, Inc. All Rights Reserved.
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of version 2 of the GNU General Public License as
6 * published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it would be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
11 *
12 * Further, this software is distributed without any warranty that it is
13 * free of the rightful claim of any third person regarding infringement
14 * or the like. Any license provided herein, whether implied or
15 * otherwise, applies only to this software file. Patent licenses, if
16 * any, provided herein do not apply to combinations of this program with
17 * other software, or any other product whatsoever.
18 *
19 * You should have received a copy of the GNU General Public License along
20 * with this program; if not, write the Free Software Foundation, Inc., 59
21 * Temple Place - Suite 330, Boston MA 02111-1307, USA.
22 *
23 * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
24 * Mountain View, CA 94043, or:
25 *
26 * http://www.sgi.com
27 *
28 * For further information regarding this notice, see:
29 *
30 * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
31 */
32#ifndef __XFS_DIR2_BLOCK_H__
33#define __XFS_DIR2_BLOCK_H__
34
35/*
36 * xfs_dir2_block.h
37 * Directory version 2, single block format structures
38 */
39
40struct uio;
41struct xfs_dabuf;
42struct xfs_da_args;
43struct xfs_dir2_data_hdr;
44struct xfs_dir2_leaf_entry;
45struct xfs_inode;
46struct xfs_mount;
47struct xfs_trans;
48
49/*
50 * The single block format is as follows:
51 * xfs_dir2_data_hdr_t structure
52 * xfs_dir2_data_entry_t and xfs_dir2_data_unused_t structures
53 * xfs_dir2_leaf_entry_t structures
54 * xfs_dir2_block_tail_t structure
55 */
56
57#define XFS_DIR2_BLOCK_MAGIC 0x58443242 /* XD2B: for one block dirs */
58
59typedef struct xfs_dir2_block_tail {
60 __uint32_t count; /* count of leaf entries */
61 __uint32_t stale; /* count of stale lf entries */
62} xfs_dir2_block_tail_t;
63
64/*
65 * Generic single-block structure, for xfs_db.
66 */
67typedef struct xfs_dir2_block {
68 xfs_dir2_data_hdr_t hdr; /* magic XFS_DIR2_BLOCK_MAGIC */
69 xfs_dir2_data_union_t u[1];
70 xfs_dir2_leaf_entry_t leaf[1];
71 xfs_dir2_block_tail_t tail;
72} xfs_dir2_block_t;
73
74/*
75 * Pointer to the leaf header embedded in a data block (1-block format)
76 */
77#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_BLOCK_TAIL_P)
78xfs_dir2_block_tail_t *
79xfs_dir2_block_tail_p(struct xfs_mount *mp, xfs_dir2_block_t *block);
80#define XFS_DIR2_BLOCK_TAIL_P(mp,block) xfs_dir2_block_tail_p(mp,block)
81#else
82#define XFS_DIR2_BLOCK_TAIL_P(mp,block) \
83 (((xfs_dir2_block_tail_t *)((char *)(block) + (mp)->m_dirblksize)) - 1)
84#endif
85
86/*
87 * Pointer to the leaf entries embedded in a data block (1-block format)
88 */
89#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_BLOCK_LEAF_P)
90struct xfs_dir2_leaf_entry *xfs_dir2_block_leaf_p(xfs_dir2_block_tail_t *btp);
91#define XFS_DIR2_BLOCK_LEAF_P(btp) \
92 xfs_dir2_block_leaf_p(btp)
93#else
94#define XFS_DIR2_BLOCK_LEAF_P(btp) \
95 (((struct xfs_dir2_leaf_entry *)(btp)) - INT_GET((btp)->count, ARCH_CONVERT))
96#endif
97
98/*
99 * Function declarations.
100 */
101
102extern int
103 xfs_dir2_block_addname(struct xfs_da_args *args);
104
105extern int
106 xfs_dir2_block_getdents(struct xfs_trans *tp, struct xfs_inode *dp,
107 struct uio *uio, int *eofp, struct xfs_dirent *dbp,
108 xfs_dir2_put_t put);
109
110extern int
111 xfs_dir2_block_lookup(struct xfs_da_args *args);
112
113extern int
114 xfs_dir2_block_removename(struct xfs_da_args *args);
115
116extern int
117 xfs_dir2_block_replace(struct xfs_da_args *args);
118
119extern int
120 xfs_dir2_leaf_to_block(struct xfs_da_args *args, struct xfs_dabuf *lbp,
121 struct xfs_dabuf *dbp);
122
123extern int
124 xfs_dir2_sf_to_block(struct xfs_da_args *args);
125
126#endif /* __XFS_DIR2_BLOCK_H__ */