linux/fs/xfs/libxfs/xfs_rmap_btree.h
Darrick J. Wong 411a71256d xfs: standardize the btree maxrecs function parameters
Standardize the parameters in xfs_{alloc,bm,ino,rmap,refcount}bt_maxrecs
so that we have consistent calling conventions.  This doesn't affect the
kernel that much, but enables us to clean up userspace a bit.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
2024-09-01 08:58:20 -07:00

73 lines
2.4 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;
struct xfbtree;
/* 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);
void xfs_rmapbt_commit_staged_btree(struct xfs_btree_cur *cur,
struct xfs_trans *tp, struct xfs_buf *agbp);
unsigned int xfs_rmapbt_maxrecs(struct xfs_mount *mp, unsigned int blocklen,
bool 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);
unsigned int xfs_rmapbt_maxlevels_ondisk(void);
int __init xfs_rmapbt_init_cur_cache(void);
void xfs_rmapbt_destroy_cur_cache(void);
struct xfs_btree_cur *xfs_rmapbt_mem_cursor(struct xfs_perag *pag,
struct xfs_trans *tp, struct xfbtree *xfbtree);
int xfs_rmapbt_mem_init(struct xfs_mount *mp, struct xfbtree *xfbtree,
struct xfs_buftarg *btp, xfs_agnumber_t agno);
#endif /* __XFS_RMAP_BTREE_H__ */