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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Nathan Scott7b718762005-11-02 14:58:39 +11002 * Copyright (c) 2000,2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004 *
Nathan Scott7b718762005-11-02 14:58:39 +11005 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 * published by the Free Software Foundation.
8 *
Nathan Scott7b718762005-11-02 14:58:39 +11009 * 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.
Linus Torvalds1da177e2005-04-16 15:20:36 -070013 *
Nathan Scott7b718762005-11-02 14:58:39 +110014 * 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
Linus Torvalds1da177e2005-04-16 15:20:36 -070017 */
18#ifndef __XFS_IALLOC_BTREE_H__
19#define __XFS_IALLOC_BTREE_H__
20
21/*
22 * Inode map on-disk structures
23 */
24
25struct xfs_buf;
26struct xfs_btree_cur;
Linus Torvalds1da177e2005-04-16 15:20:36 -070027struct xfs_mount;
28
29/*
Christoph Hellwig7cc95a82008-10-30 17:14:34 +110030 * Btree block header size depends on a superblock flag.
Christoph Hellwig7cc95a82008-10-30 17:14:34 +110031 */
Christoph Hellwigee1a47a2013-04-21 14:53:46 -050032#define XFS_INOBT_BLOCK_LEN(mp) \
33 (xfs_sb_version_hascrc(&((mp)->m_sb)) ? \
34 XFS_BTREE_SBLOCK_CRC_LEN : XFS_BTREE_SBLOCK_LEN)
Christoph Hellwig7cc95a82008-10-30 17:14:34 +110035
36/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070037 * Record, key, and pointer address macros for btree blocks.
Christoph Hellwig136341b2008-10-30 17:11:40 +110038 *
39 * (note that some of these may appear unused, but they are used in userspace)
Linus Torvalds1da177e2005-04-16 15:20:36 -070040 */
Christoph Hellwig136341b2008-10-30 17:11:40 +110041#define XFS_INOBT_REC_ADDR(mp, block, index) \
42 ((xfs_inobt_rec_t *) \
43 ((char *)(block) + \
Christoph Hellwig7cc95a82008-10-30 17:14:34 +110044 XFS_INOBT_BLOCK_LEN(mp) + \
Christoph Hellwig136341b2008-10-30 17:11:40 +110045 (((index) - 1) * sizeof(xfs_inobt_rec_t))))
Eric Sandeen2c36dde2007-02-10 18:37:33 +110046
Christoph Hellwig136341b2008-10-30 17:11:40 +110047#define XFS_INOBT_KEY_ADDR(mp, block, index) \
48 ((xfs_inobt_key_t *) \
49 ((char *)(block) + \
Christoph Hellwig7cc95a82008-10-30 17:14:34 +110050 XFS_INOBT_BLOCK_LEN(mp) + \
Christoph Hellwig136341b2008-10-30 17:11:40 +110051 ((index) - 1) * sizeof(xfs_inobt_key_t)))
Linus Torvalds1da177e2005-04-16 15:20:36 -070052
Christoph Hellwig136341b2008-10-30 17:11:40 +110053#define XFS_INOBT_PTR_ADDR(mp, block, index, maxrecs) \
54 ((xfs_inobt_ptr_t *) \
55 ((char *)(block) + \
Christoph Hellwig7cc95a82008-10-30 17:14:34 +110056 XFS_INOBT_BLOCK_LEN(mp) + \
Christoph Hellwig136341b2008-10-30 17:11:40 +110057 (maxrecs) * sizeof(xfs_inobt_key_t) + \
58 ((index) - 1) * sizeof(xfs_inobt_ptr_t)))
Linus Torvalds1da177e2005-04-16 15:20:36 -070059
Christoph Hellwig561f7d12008-10-30 16:53:59 +110060extern struct xfs_btree_cur *xfs_inobt_init_cursor(struct xfs_mount *,
61 struct xfs_trans *, struct xfs_buf *, xfs_agnumber_t);
Christoph Hellwig60197e82008-10-30 17:11:19 +110062extern int xfs_inobt_maxrecs(struct xfs_mount *, int, int);
Christoph Hellwig561f7d12008-10-30 16:53:59 +110063
Linus Torvalds1da177e2005-04-16 15:20:36 -070064#endif /* __XFS_IALLOC_BTREE_H__ */