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- /*
- * 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__ */
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