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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (C) 2022 Oracle. All Rights Reserved.
* Author: Darrick J. Wong <djwong@kernel.org>
*/
#ifndef XFS_SCRUB_XFBTREE_H__
#define XFS_SCRUB_XFBTREE_H__
#ifdef CONFIG_XFS_IN_MEMORY_BTREE
/* Root block for an in-memory btree. */
struct xfs_btree_mem_head {
__be32 mh_magic;
__be32 mh_nlevels;
__be64 mh_owner;
__be64 mh_root;
uuid_t mh_uuid;
};
#define XFS_BTREE_MEM_HEAD_MAGIC 0x4341544D /* "CATM" */
/* xfile-backed in-memory btrees */
struct xfbtree {
/* buffer cache target for the xfile backing this in-memory btree */
struct xfs_buftarg *target;
/* Bitmap of free space from pos to used */
struct xbitmap *freespace;
/* Number of xfile blocks actually used by this xfbtree. */
xfileoff_t xf_used;
/* Owner of this btree. */
unsigned long long owner;
/* Minimum and maximum records per block. */
unsigned int maxrecs[2];
unsigned int minrecs[2];
};
/* The head of the in-memory btree is always at block 0 */
#define XFBTREE_HEAD_BLOCK 0
/* in-memory btrees are always created with an empty leaf block at block 1 */
#define XFBTREE_INIT_LEAF_BLOCK 1
int xfbtree_head_read_buf(struct xfbtree *xfbt, struct xfs_trans *tp,
struct xfs_buf **bpp);
void xfbtree_destroy(struct xfbtree *xfbt);
int xfbtree_trans_commit(struct xfbtree *xfbt, struct xfs_trans *tp);
void xfbtree_trans_cancel(struct xfbtree *xfbt, struct xfs_trans *tp);
#endif /* CONFIG_XFS_IN_MEMORY_BTREE */
#endif /* XFS_SCRUB_XFBTREE_H__ */
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