forked from Qortal/Brooklyn
04c1822c0a
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63 lines
2.1 KiB
C
63 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2014 Red Hat, Inc.
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* All Rights Reserved.
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*/
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#ifndef __XFS_RMAP_BTREE_H__
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#define __XFS_RMAP_BTREE_H__
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struct xfs_buf;
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struct xfs_btree_cur;
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struct xfs_mount;
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struct xbtree_afakeroot;
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/* rmaps only exist on crc enabled filesystems */
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#define XFS_RMAP_BLOCK_LEN XFS_BTREE_SBLOCK_CRC_LEN
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/*
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* Record, key, and pointer address macros for btree blocks.
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*
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* (note that some of these may appear unused, but they are used in userspace)
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*/
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#define XFS_RMAP_REC_ADDR(block, index) \
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((struct xfs_rmap_rec *) \
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((char *)(block) + XFS_RMAP_BLOCK_LEN + \
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(((index) - 1) * sizeof(struct xfs_rmap_rec))))
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#define XFS_RMAP_KEY_ADDR(block, index) \
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((struct xfs_rmap_key *) \
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((char *)(block) + XFS_RMAP_BLOCK_LEN + \
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((index) - 1) * 2 * sizeof(struct xfs_rmap_key)))
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#define XFS_RMAP_HIGH_KEY_ADDR(block, index) \
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((struct xfs_rmap_key *) \
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((char *)(block) + XFS_RMAP_BLOCK_LEN + \
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sizeof(struct xfs_rmap_key) + \
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((index) - 1) * 2 * sizeof(struct xfs_rmap_key)))
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#define XFS_RMAP_PTR_ADDR(block, index, maxrecs) \
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((xfs_rmap_ptr_t *) \
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((char *)(block) + XFS_RMAP_BLOCK_LEN + \
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(maxrecs) * 2 * sizeof(struct xfs_rmap_key) + \
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((index) - 1) * sizeof(xfs_rmap_ptr_t)))
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struct xfs_btree_cur *xfs_rmapbt_init_cursor(struct xfs_mount *mp,
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struct xfs_trans *tp, struct xfs_buf *bp,
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struct xfs_perag *pag);
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struct xfs_btree_cur *xfs_rmapbt_stage_cursor(struct xfs_mount *mp,
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struct xbtree_afakeroot *afake, struct xfs_perag *pag);
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void xfs_rmapbt_commit_staged_btree(struct xfs_btree_cur *cur,
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struct xfs_trans *tp, struct xfs_buf *agbp);
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int xfs_rmapbt_maxrecs(int blocklen, int leaf);
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extern void xfs_rmapbt_compute_maxlevels(struct xfs_mount *mp);
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extern xfs_extlen_t xfs_rmapbt_calc_size(struct xfs_mount *mp,
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unsigned long long len);
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extern xfs_extlen_t xfs_rmapbt_max_size(struct xfs_mount *mp,
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xfs_agblock_t agblocks);
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extern int xfs_rmapbt_calc_reserves(struct xfs_mount *mp, struct xfs_trans *tp,
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struct xfs_perag *pag, xfs_extlen_t *ask, xfs_extlen_t *used);
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#endif /* __XFS_RMAP_BTREE_H__ */
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