63 lines
2.1 KiB
C
63 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Copyright (c) 2014 Red Hat, Inc.
|
|
* All Rights Reserved.
|
|
*/
|
|
#ifndef __XFS_RMAP_BTREE_H__
|
|
#define __XFS_RMAP_BTREE_H__
|
|
|
|
struct xfs_buf;
|
|
struct xfs_btree_cur;
|
|
struct xfs_mount;
|
|
struct xbtree_afakeroot;
|
|
|
|
/* rmaps only exist on crc enabled filesystems */
|
|
#define XFS_RMAP_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_RMAP_REC_ADDR(block, index) \
|
|
((struct xfs_rmap_rec *) \
|
|
((char *)(block) + XFS_RMAP_BLOCK_LEN + \
|
|
(((index) - 1) * sizeof(struct xfs_rmap_rec))))
|
|
|
|
#define XFS_RMAP_KEY_ADDR(block, index) \
|
|
((struct xfs_rmap_key *) \
|
|
((char *)(block) + XFS_RMAP_BLOCK_LEN + \
|
|
((index) - 1) * 2 * sizeof(struct xfs_rmap_key)))
|
|
|
|
#define XFS_RMAP_HIGH_KEY_ADDR(block, index) \
|
|
((struct xfs_rmap_key *) \
|
|
((char *)(block) + XFS_RMAP_BLOCK_LEN + \
|
|
sizeof(struct xfs_rmap_key) + \
|
|
((index) - 1) * 2 * sizeof(struct xfs_rmap_key)))
|
|
|
|
#define XFS_RMAP_PTR_ADDR(block, index, maxrecs) \
|
|
((xfs_rmap_ptr_t *) \
|
|
((char *)(block) + XFS_RMAP_BLOCK_LEN + \
|
|
(maxrecs) * 2 * sizeof(struct xfs_rmap_key) + \
|
|
((index) - 1) * sizeof(xfs_rmap_ptr_t)))
|
|
|
|
struct xfs_btree_cur *xfs_rmapbt_init_cursor(struct xfs_mount *mp,
|
|
struct xfs_trans *tp, struct xfs_buf *bp,
|
|
struct xfs_perag *pag);
|
|
struct xfs_btree_cur *xfs_rmapbt_stage_cursor(struct xfs_mount *mp,
|
|
struct xbtree_afakeroot *afake, struct xfs_perag *pag);
|
|
void xfs_rmapbt_commit_staged_btree(struct xfs_btree_cur *cur,
|
|
struct xfs_trans *tp, struct xfs_buf *agbp);
|
|
int xfs_rmapbt_maxrecs(int blocklen, int leaf);
|
|
extern void xfs_rmapbt_compute_maxlevels(struct xfs_mount *mp);
|
|
|
|
extern xfs_extlen_t xfs_rmapbt_calc_size(struct xfs_mount *mp,
|
|
unsigned long long len);
|
|
extern xfs_extlen_t xfs_rmapbt_max_size(struct xfs_mount *mp,
|
|
xfs_agblock_t agblocks);
|
|
|
|
extern int xfs_rmapbt_calc_reserves(struct xfs_mount *mp, struct xfs_trans *tp,
|
|
struct xfs_perag *pag, xfs_extlen_t *ask, xfs_extlen_t *used);
|
|
|
|
#endif /* __XFS_RMAP_BTREE_H__ */
|