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- /*
- * Copyright (C) 2016 Oracle. All Rights Reserved.
- *
- * Author: Darrick J. Wong <darrick.wong@oracle.com>
- *
- * 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; either version 2
- * of the License, or (at your option) any later version.
- *
- * 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_REFCOUNT_BTREE_H__
- #define __XFS_REFCOUNT_BTREE_H__
- /*
- * Reference Count Btree on-disk structures
- */
- struct xfs_buf;
- struct xfs_btree_cur;
- struct xfs_mount;
- /*
- * Btree block header size
- */
- #define XFS_REFCOUNT_BLOCK_LEN XFS_BTREE_SBLOCK_CRC_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_REFCOUNT_REC_ADDR(block, index) \
- ((struct xfs_refcount_rec *) \
- ((char *)(block) + \
- XFS_REFCOUNT_BLOCK_LEN + \
- (((index) - 1) * sizeof(struct xfs_refcount_rec))))
- #define XFS_REFCOUNT_KEY_ADDR(block, index) \
- ((struct xfs_refcount_key *) \
- ((char *)(block) + \
- XFS_REFCOUNT_BLOCK_LEN + \
- ((index) - 1) * sizeof(struct xfs_refcount_key)))
- #define XFS_REFCOUNT_PTR_ADDR(block, index, maxrecs) \
- ((xfs_refcount_ptr_t *) \
- ((char *)(block) + \
- XFS_REFCOUNT_BLOCK_LEN + \
- (maxrecs) * sizeof(struct xfs_refcount_key) + \
- ((index) - 1) * sizeof(xfs_refcount_ptr_t)))
- extern struct xfs_btree_cur *xfs_refcountbt_init_cursor(struct xfs_mount *mp,
- struct xfs_trans *tp, struct xfs_buf *agbp, xfs_agnumber_t agno,
- struct xfs_defer_ops *dfops);
- extern int xfs_refcountbt_maxrecs(struct xfs_mount *mp, int blocklen,
- bool leaf);
- extern void xfs_refcountbt_compute_maxlevels(struct xfs_mount *mp);
- extern xfs_extlen_t xfs_refcountbt_calc_size(struct xfs_mount *mp,
- unsigned long long len);
- extern xfs_extlen_t xfs_refcountbt_max_size(struct xfs_mount *mp,
- xfs_agblock_t agblocks);
- extern int xfs_refcountbt_calc_reserves(struct xfs_mount *mp,
- xfs_agnumber_t agno, xfs_extlen_t *ask, xfs_extlen_t *used);
- #endif /* __XFS_REFCOUNT_BTREE_H__ */
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