2 * Copyright (c) 2000,2005 Silicon Graphics, Inc.
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.
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.
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
18 #ifndef __XFS_IALLOC_BTREE_H__
19 #define __XFS_IALLOC_BTREE_H__
22 * Inode map on-disk structures
30 * Btree block header size depends on a superblock flag.
32 #define XFS_INOBT_BLOCK_LEN(mp) \
33 (xfs_sb_version_hascrc(&((mp)->m_sb)) ? \
34 XFS_BTREE_SBLOCK_CRC_LEN : XFS_BTREE_SBLOCK_LEN)
37 * Record, key, and pointer address macros for btree blocks.
39 * (note that some of these may appear unused, but they are used in userspace)
41 #define XFS_INOBT_REC_ADDR(mp, block, index) \
42 ((xfs_inobt_rec_t *) \
44 XFS_INOBT_BLOCK_LEN(mp) + \
45 (((index) - 1) * sizeof(xfs_inobt_rec_t))))
47 #define XFS_INOBT_KEY_ADDR(mp, block, index) \
48 ((xfs_inobt_key_t *) \
50 XFS_INOBT_BLOCK_LEN(mp) + \
51 ((index) - 1) * sizeof(xfs_inobt_key_t)))
53 #define XFS_INOBT_PTR_ADDR(mp, block, index, maxrecs) \
54 ((xfs_inobt_ptr_t *) \
56 XFS_INOBT_BLOCK_LEN(mp) + \
57 (maxrecs) * sizeof(xfs_inobt_key_t) + \
58 ((index) - 1) * sizeof(xfs_inobt_ptr_t)))
60 extern struct xfs_btree_cur *xfs_inobt_init_cursor(struct xfs_mount *,
61 struct xfs_trans *, struct xfs_buf *, xfs_agnumber_t);
62 extern int xfs_inobt_maxrecs(struct xfs_mount *, int, int);
64 #endif /* __XFS_IALLOC_BTREE_H__ */