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62 lines
2.0 KiB
62 lines
2.0 KiB
// 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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xfs_agnumber_t agno); |
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struct xfs_btree_cur *xfs_rmapbt_stage_cursor(struct xfs_mount *mp, |
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struct xbtree_afakeroot *afake, xfs_agnumber_t agno); |
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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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xfs_agnumber_t agno, xfs_extlen_t *ask, xfs_extlen_t *used); |
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#endif /* __XFS_RMAP_BTREE_H__ */
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