mirror of
https://github.com/torvalds/linux.git
synced 2024-12-27 05:11:48 +00:00
1c8b9fd278
Split xfs_allocbt_init_cursor into separate routines for the by-bno and by-cnt btrees to prepare for the removal of the xfs_btnum global enumeration of btree types. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <djwong@kernel.org> Signed-off-by: Darrick J. Wong <djwong@kernel.org>
69 lines
1.9 KiB
C
69 lines
1.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* Copyright (c) 2000,2005 Silicon Graphics, Inc.
|
|
* All Rights Reserved.
|
|
*/
|
|
#ifndef __XFS_ALLOC_BTREE_H__
|
|
#define __XFS_ALLOC_BTREE_H__
|
|
|
|
/*
|
|
* Freespace on-disk structures
|
|
*/
|
|
|
|
struct xfs_buf;
|
|
struct xfs_btree_cur;
|
|
struct xfs_mount;
|
|
struct xfs_perag;
|
|
struct xbtree_afakeroot;
|
|
|
|
/*
|
|
* Btree block header size depends on a superblock flag.
|
|
*/
|
|
#define XFS_ALLOC_BLOCK_LEN(mp) \
|
|
(xfs_has_crc(((mp))) ? \
|
|
XFS_BTREE_SBLOCK_CRC_LEN : XFS_BTREE_SBLOCK_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_ALLOC_REC_ADDR(mp, block, index) \
|
|
((xfs_alloc_rec_t *) \
|
|
((char *)(block) + \
|
|
XFS_ALLOC_BLOCK_LEN(mp) + \
|
|
(((index) - 1) * sizeof(xfs_alloc_rec_t))))
|
|
|
|
#define XFS_ALLOC_KEY_ADDR(mp, block, index) \
|
|
((xfs_alloc_key_t *) \
|
|
((char *)(block) + \
|
|
XFS_ALLOC_BLOCK_LEN(mp) + \
|
|
((index) - 1) * sizeof(xfs_alloc_key_t)))
|
|
|
|
#define XFS_ALLOC_PTR_ADDR(mp, block, index, maxrecs) \
|
|
((xfs_alloc_ptr_t *) \
|
|
((char *)(block) + \
|
|
XFS_ALLOC_BLOCK_LEN(mp) + \
|
|
(maxrecs) * sizeof(xfs_alloc_key_t) + \
|
|
((index) - 1) * sizeof(xfs_alloc_ptr_t)))
|
|
|
|
struct xfs_btree_cur *xfs_bnobt_init_cursor(struct xfs_mount *mp,
|
|
struct xfs_trans *tp, struct xfs_buf *bp,
|
|
struct xfs_perag *pag);
|
|
struct xfs_btree_cur *xfs_cntbt_init_cursor(struct xfs_mount *mp,
|
|
struct xfs_trans *tp, struct xfs_buf *bp,
|
|
struct xfs_perag *pag);
|
|
extern int xfs_allocbt_maxrecs(struct xfs_mount *, int, int);
|
|
extern xfs_extlen_t xfs_allocbt_calc_size(struct xfs_mount *mp,
|
|
unsigned long long len);
|
|
|
|
void xfs_allocbt_commit_staged_btree(struct xfs_btree_cur *cur,
|
|
struct xfs_trans *tp, struct xfs_buf *agbp);
|
|
|
|
unsigned int xfs_allocbt_maxlevels_ondisk(void);
|
|
|
|
int __init xfs_allocbt_init_cur_cache(void);
|
|
void xfs_allocbt_destroy_cur_cache(void);
|
|
|
|
#endif /* __XFS_ALLOC_BTREE_H__ */
|