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73 lines
2.2 KiB
73 lines
2.2 KiB
// SPDX-License-Identifier: GPL-2.0+ |
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/* |
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* Copyright (C) 2016 Oracle. All Rights Reserved. |
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* Author: Darrick J. Wong <[email protected]> |
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*/ |
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#ifndef __XFS_REFCOUNT_BTREE_H__ |
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#define __XFS_REFCOUNT_BTREE_H__ |
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/* |
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* Reference Count Btree on-disk structures |
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*/ |
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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 xfs_perag; |
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struct xbtree_afakeroot; |
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/* |
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* Btree block header size |
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*/ |
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#define XFS_REFCOUNT_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_REFCOUNT_REC_ADDR(block, index) \ |
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((struct xfs_refcount_rec *) \ |
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((char *)(block) + \ |
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XFS_REFCOUNT_BLOCK_LEN + \ |
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(((index) - 1) * sizeof(struct xfs_refcount_rec)))) |
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#define XFS_REFCOUNT_KEY_ADDR(block, index) \ |
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((struct xfs_refcount_key *) \ |
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((char *)(block) + \ |
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XFS_REFCOUNT_BLOCK_LEN + \ |
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((index) - 1) * sizeof(struct xfs_refcount_key))) |
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#define XFS_REFCOUNT_PTR_ADDR(block, index, maxrecs) \ |
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((xfs_refcount_ptr_t *) \ |
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((char *)(block) + \ |
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XFS_REFCOUNT_BLOCK_LEN + \ |
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(maxrecs) * sizeof(struct xfs_refcount_key) + \ |
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((index) - 1) * sizeof(xfs_refcount_ptr_t))) |
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extern struct xfs_btree_cur *xfs_refcountbt_init_cursor(struct xfs_mount *mp, |
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struct xfs_trans *tp, struct xfs_buf *agbp, |
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struct xfs_perag *pag); |
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struct xfs_btree_cur *xfs_refcountbt_stage_cursor(struct xfs_mount *mp, |
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struct xbtree_afakeroot *afake, struct xfs_perag *pag); |
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extern int xfs_refcountbt_maxrecs(int blocklen, bool leaf); |
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extern void xfs_refcountbt_compute_maxlevels(struct xfs_mount *mp); |
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extern xfs_extlen_t xfs_refcountbt_calc_size(struct xfs_mount *mp, |
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unsigned long long len); |
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extern xfs_extlen_t xfs_refcountbt_max_size(struct xfs_mount *mp, |
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xfs_agblock_t agblocks); |
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extern int xfs_refcountbt_calc_reserves(struct xfs_mount *mp, |
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struct xfs_trans *tp, struct xfs_perag *pag, xfs_extlen_t *ask, |
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xfs_extlen_t *used); |
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void xfs_refcountbt_commit_staged_btree(struct xfs_btree_cur *cur, |
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struct xfs_trans *tp, struct xfs_buf *agbp); |
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unsigned int xfs_refcountbt_maxlevels_ondisk(void); |
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int __init xfs_refcountbt_init_cur_cache(void); |
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void xfs_refcountbt_destroy_cur_cache(void); |
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#endif /* __XFS_REFCOUNT_BTREE_H__ */
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