76 lines
2.2 KiB
C
76 lines
2.2 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (c) 2021-2024 Oracle. All Rights Reserved.
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* Author: Darrick J. Wong <djwong@kernel.org>
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*/
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#ifndef __XFS_BTREE_MEM_H__
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#define __XFS_BTREE_MEM_H__
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typedef uint64_t xfbno_t;
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#define XFBNO_BLOCKSIZE (XMBUF_BLOCKSIZE)
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#define XFBNO_BBSHIFT (XMBUF_BLOCKSHIFT - BBSHIFT)
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#define XFBNO_BBSIZE (XFBNO_BLOCKSIZE >> BBSHIFT)
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static inline xfs_daddr_t xfbno_to_daddr(xfbno_t blkno)
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{
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return blkno << XFBNO_BBSHIFT;
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}
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static inline xfbno_t xfs_daddr_to_xfbno(xfs_daddr_t daddr)
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{
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return daddr >> XFBNO_BBSHIFT;
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}
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struct xfbtree {
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/* buffer cache target for this in-memory btree */
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struct xfs_buftarg *target;
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/* Highest block number that has been written to. */
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xfbno_t highest_bno;
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/* Owner of this btree. */
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unsigned long long owner;
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/* Btree header */
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union xfs_btree_ptr root;
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unsigned int nlevels;
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/* Minimum and maximum records per block. */
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unsigned int maxrecs[2];
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unsigned int minrecs[2];
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};
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#ifdef CONFIG_XFS_BTREE_IN_MEM
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static inline bool xfbtree_verify_bno(struct xfbtree *xfbt, xfbno_t bno)
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{
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return xmbuf_verify_daddr(xfbt->target, xfbno_to_daddr(bno));
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}
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void xfbtree_set_root(struct xfs_btree_cur *cur,
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const union xfs_btree_ptr *ptr, int inc);
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void xfbtree_init_ptr_from_cur(struct xfs_btree_cur *cur,
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union xfs_btree_ptr *ptr);
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struct xfs_btree_cur *xfbtree_dup_cursor(struct xfs_btree_cur *cur);
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int xfbtree_get_minrecs(struct xfs_btree_cur *cur, int level);
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int xfbtree_get_maxrecs(struct xfs_btree_cur *cur, int level);
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int xfbtree_alloc_block(struct xfs_btree_cur *cur,
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const union xfs_btree_ptr *start, union xfs_btree_ptr *ptr,
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int *stat);
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int xfbtree_free_block(struct xfs_btree_cur *cur, struct xfs_buf *bp);
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/* Callers must set xfbt->target and xfbt->owner before calling this */
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int xfbtree_init(struct xfs_mount *mp, struct xfbtree *xfbt,
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struct xfs_buftarg *btp, const struct xfs_btree_ops *ops);
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void xfbtree_destroy(struct xfbtree *xfbt);
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int xfbtree_trans_commit(struct xfbtree *xfbt, struct xfs_trans *tp);
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void xfbtree_trans_cancel(struct xfbtree *xfbt, struct xfs_trans *tp);
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#else
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# define xfbtree_verify_bno(...) (false)
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#endif /* CONFIG_XFS_BTREE_IN_MEM */
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#endif /* __XFS_BTREE_MEM_H__ */
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