mirror of
https://github.com/Fishwaldo/linux-bl808.git
synced 2025-06-17 20:25:19 +00:00
0ed5f7356d
Add code for all five btree types so that we can compute the absolute maximum possible btree height for each btree type. This is a setup for the next patch, which makes every btree type have its own cursor cache. The functions are exported so that we can have xfs_db report the absolute maximum btree heights for each btree type, rather than making everyone run their own ad-hoc computations. Signed-off-by: Darrick J. Wong <djwong@kernel.org> Reviewed-by: Dave Chinner <dchinner@redhat.com>
70 lines
2.1 KiB
C
70 lines
2.1 KiB
C
// 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;
|
|
struct xfs_perag;
|
|
struct xbtree_afakeroot;
|
|
|
|
/*
|
|
* 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,
|
|
struct xfs_perag *pag);
|
|
struct xfs_btree_cur *xfs_refcountbt_stage_cursor(struct xfs_mount *mp,
|
|
struct xbtree_afakeroot *afake, struct xfs_perag *pag);
|
|
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, struct xfs_perag *pag, xfs_extlen_t *ask,
|
|
xfs_extlen_t *used);
|
|
|
|
void xfs_refcountbt_commit_staged_btree(struct xfs_btree_cur *cur,
|
|
struct xfs_trans *tp, struct xfs_buf *agbp);
|
|
|
|
unsigned int xfs_refcountbt_maxlevels_ondisk(void);
|
|
|
|
#endif /* __XFS_REFCOUNT_BTREE_H__ */
|