2 * Copyright (c) 2000-2001 Silicon Graphics, Inc. All Rights Reserved.
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.
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.
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.
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.
23 * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
24 * Mountain View, CA 94043, or:
28 * For further information regarding this notice, see:
30 * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
32 #ifndef __XFS_DIR2_BLOCK_H__
33 #define __XFS_DIR2_BLOCK_H__
37 * Directory version 2, single block format structures
43 struct xfs_dir2_data_hdr
;
44 struct xfs_dir2_leaf_entry
;
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
57 #define XFS_DIR2_BLOCK_MAGIC 0x58443242 /* XD2B: for one block dirs */
59 typedef 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
;
65 * Generic single-block structure, for xfs_db.
67 typedef 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
;
75 * Pointer to the leaf header embedded in a data block (1-block format)
77 #if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_BLOCK_TAIL_P)
78 xfs_dir2_block_tail_t
*
79 xfs_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)
82 #define XFS_DIR2_BLOCK_TAIL_P(mp,block) \
83 (((xfs_dir2_block_tail_t *)((char *)(block) + (mp)->m_dirblksize)) - 1)
87 * Pointer to the leaf entries embedded in a data block (1-block format)
89 #if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_BLOCK_LEAF_P)
90 struct xfs_dir2_leaf_entry
*xfs_dir2_block_leaf_p_arch(
91 xfs_dir2_block_tail_t
*btp
, xfs_arch_t arch
);
92 #define XFS_DIR2_BLOCK_LEAF_P_ARCH(btp,arch) \
93 xfs_dir2_block_leaf_p_arch(btp,arch)
95 #define XFS_DIR2_BLOCK_LEAF_P_ARCH(btp,arch) \
96 (((struct xfs_dir2_leaf_entry *)(btp)) - INT_GET((btp)->count, arch))
100 * Function declarations.
104 xfs_dir2_block_addname(struct xfs_da_args
*args
);
107 xfs_dir2_block_getdents(struct xfs_trans
*tp
, struct xfs_inode
*dp
,
108 struct uio
*uio
, int *eofp
, struct xfs_dirent
*dbp
,
112 xfs_dir2_block_lookup(struct xfs_da_args
*args
);
115 xfs_dir2_block_removename(struct xfs_da_args
*args
);
118 xfs_dir2_block_replace(struct xfs_da_args
*args
);
121 xfs_dir2_leaf_to_block(struct xfs_da_args
*args
, struct xfs_dabuf
*lbp
,
122 struct xfs_dabuf
*dbp
);
125 xfs_dir2_sf_to_block(struct xfs_da_args
*args
);
127 #endif /* __XFS_DIR2_BLOCK_H__ */