66 lines
2.0 KiB
C
66 lines
2.0 KiB
C
|
/*
|
||
|
|
* Copyright (c) 2000,2005 Silicon Graphics, Inc.
|
||
|
|
* All Rights Reserved.
|
||
|
|
*
|
||
|
|
* This program is free software; you can redistribute it and/or
|
||
|
|
* modify it under the terms of the GNU General Public License as
|
||
|
|
* published by the Free Software Foundation.
|
||
|
|
*
|
||
|
|
* This program is distributed in the hope that it would be useful,
|
||
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
|
|
* GNU General Public License for more details.
|
||
|
|
*
|
||
|
|
* You should have received a copy of the GNU General Public License
|
||
|
|
* along with this program; if not, write the Free Software Foundation,
|
||
|
|
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
||
|
|
*/
|
||
|
|
#ifndef __XFS_ALLOC_BTREE_H__
|
||
|
|
#define __XFS_ALLOC_BTREE_H__
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Freespace on-disk structures
|
||
|
|
*/
|
||
|
|
|
||
|
|
struct xfs_buf;
|
||
|
|
struct xfs_btree_cur;
|
||
|
|
struct xfs_mount;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Btree block header size depends on a superblock flag.
|
||
|
|
*/
|
||
|
|
#define XFS_ALLOC_BLOCK_LEN(mp) \
|
||
|
|
(xfs_sb_version_hascrc(&((mp)->m_sb)) ? \
|
||
|
|
XFS_BTREE_SBLOCK_CRC_LEN : XFS_BTREE_SBLOCK_LEN)
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Record, key, and pointer address macros for btree blocks.
|
||
|
|
*
|
||
|
|
* (note that some of these may appear unused, but they are used in userspace)
|
||
|
|
*/
|
||
|
|
#define XFS_ALLOC_REC_ADDR(mp, block, index) \
|
||
|
|
((xfs_alloc_rec_t *) \
|
||
|
|
((char *)(block) + \
|
||
|
|
XFS_ALLOC_BLOCK_LEN(mp) + \
|
||
|
|
(((index) - 1) * sizeof(xfs_alloc_rec_t))))
|
||
|
|
|
||
|
|
#define XFS_ALLOC_KEY_ADDR(mp, block, index) \
|
||
|
|
((xfs_alloc_key_t *) \
|
||
|
|
((char *)(block) + \
|
||
|
|
XFS_ALLOC_BLOCK_LEN(mp) + \
|
||
|
|
((index) - 1) * sizeof(xfs_alloc_key_t)))
|
||
|
|
|
||
|
|
#define XFS_ALLOC_PTR_ADDR(mp, block, index, maxrecs) \
|
||
|
|
((xfs_alloc_ptr_t *) \
|
||
|
|
((char *)(block) + \
|
||
|
|
XFS_ALLOC_BLOCK_LEN(mp) + \
|
||
|
|
(maxrecs) * sizeof(xfs_alloc_key_t) + \
|
||
|
|
((index) - 1) * sizeof(xfs_alloc_ptr_t)))
|
||
|
|
|
||
|
|
extern struct xfs_btree_cur *xfs_allocbt_init_cursor(struct xfs_mount *,
|
||
|
|
struct xfs_trans *, struct xfs_buf *,
|
||
|
|
xfs_agnumber_t, xfs_btnum_t);
|
||
|
|
extern int xfs_allocbt_maxrecs(struct xfs_mount *, int, int);
|
||
|
|
|
||
|
|
#endif /* __XFS_ALLOC_BTREE_H__ */
|