You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
65 lines
2.0 KiB
65 lines
2.0 KiB
/* |
|
* 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__ */
|
|
|