| 12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061 |
- // SPDX-License-Identifier: GPL-2.0+
- /*
- * Copyright (C) 2016 Oracle. All Rights Reserved.
- * Author: Darrick J. Wong <darrick.wong@oracle.com>
- */
- #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);
- extern int xfs_refcountbt_maxrecs(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,
- struct xfs_trans *tp, xfs_agnumber_t agno, xfs_extlen_t *ask,
- xfs_extlen_t *used);
- #endif /* __XFS_REFCOUNT_BTREE_H__ */
|
