Git Repo - linux.git/blame_incremental - fs/xfs/libxfs/xfs_rmap

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Commit	Line	Data
	1	// SPDX-License-Identifier: GPL-2.0
	2	/*
	3	* Copyright (c) 2014 Red Hat, Inc.
	4	* All Rights Reserved.
	5	*/
	6	#ifndef __XFS_RMAP_BTREE_H__
	7	#define __XFS_RMAP_BTREE_H__
	8
	9	struct xfs_buf;
	10	struct xfs_btree_cur;
	11	struct xfs_mount;
	12
	13	/* rmaps only exist on crc enabled filesystems */
	14	#define XFS_RMAP_BLOCK_LEN XFS_BTREE_SBLOCK_CRC_LEN
	15
	16	/*
	17	* Record, key, and pointer address macros for btree blocks.
	18	*
	19	* (note that some of these may appear unused, but they are used in userspace)
	20	*/
	21	#define XFS_RMAP_REC_ADDR(block, index) \
	22	((struct xfs_rmap_rec *) \
	23	((char *)(block) + XFS_RMAP_BLOCK_LEN + \
	24	(((index) - 1) * sizeof(struct xfs_rmap_rec))))
	25
	26	#define XFS_RMAP_KEY_ADDR(block, index) \
	27	((struct xfs_rmap_key *) \
	28	((char *)(block) + XFS_RMAP_BLOCK_LEN + \
	29	((index) - 1) * 2 * sizeof(struct xfs_rmap_key)))
	30
	31	#define XFS_RMAP_HIGH_KEY_ADDR(block, index) \
	32	((struct xfs_rmap_key *) \
	33	((char *)(block) + XFS_RMAP_BLOCK_LEN + \
	34	sizeof(struct xfs_rmap_key) + \
	35	((index) - 1) * 2 * sizeof(struct xfs_rmap_key)))
	36
	37	#define XFS_RMAP_PTR_ADDR(block, index, maxrecs) \
	38	((xfs_rmap_ptr_t *) \
	39	((char *)(block) + XFS_RMAP_BLOCK_LEN + \
	40	(maxrecs) * 2 * sizeof(struct xfs_rmap_key) + \
	41	((index) - 1) * sizeof(xfs_rmap_ptr_t)))
	42
	43	struct xfs_btree_cur xfs_rmapbt_init_cursor(struct xfs_mount mp,
	44	struct xfs_trans tp, struct xfs_buf bp,
	45	xfs_agnumber_t agno);
	46	int xfs_rmapbt_maxrecs(int blocklen, int leaf);
	47	extern void xfs_rmapbt_compute_maxlevels(struct xfs_mount *mp);
	48
	49	extern xfs_extlen_t xfs_rmapbt_calc_size(struct xfs_mount *mp,
	50	unsigned long long len);
	51	extern xfs_extlen_t xfs_rmapbt_max_size(struct xfs_mount *mp,
	52	xfs_agblock_t agblocks);
	53
	54	extern int xfs_rmapbt_calc_reserves(struct xfs_mount mp, struct xfs_trans tp,
	55	xfs_agnumber_t agno, xfs_extlen_t ask, xfs_extlen_t used);
	56
	57	#endif /* __XFS_RMAP_BTREE_H__ */