76 lines
2.5 KiB
C
76 lines
2.5 KiB
C
/*
|
|
* 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__ */
|