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Create a bag structure for refcount information that uses the refcount bag btree defined in the previous patch. Signed-off-by: Darrick J. Wong <djwong@kernel.org> Reviewed-by: Christoph Hellwig <hch@lst.de>
82 lines
2.3 KiB
C
82 lines
2.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) 2022-2024 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_SCRUB_RCBAG_BTREE_H__
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#define __XFS_SCRUB_RCBAG_BTREE_H__
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#ifdef CONFIG_XFS_BTREE_IN_MEM
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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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#define RCBAG_MAGIC 0x74826671 /* 'JRBG' */
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struct rcbag_key {
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uint32_t rbg_startblock;
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uint32_t rbg_blockcount;
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};
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struct rcbag_rec {
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uint32_t rbg_startblock;
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uint32_t rbg_blockcount;
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uint64_t rbg_refcount;
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};
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typedef __be64 rcbag_ptr_t;
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/* reflinks only exist on crc enabled filesystems */
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#define RCBAG_BLOCK_LEN XFS_BTREE_LBLOCK_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 RCBAG_REC_ADDR(block, index) \
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((struct rcbag_rec *) \
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((char *)(block) + RCBAG_BLOCK_LEN + \
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(((index) - 1) * sizeof(struct rcbag_rec))))
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#define RCBAG_KEY_ADDR(block, index) \
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((struct rcbag_key *) \
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((char *)(block) + RCBAG_BLOCK_LEN + \
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((index) - 1) * sizeof(struct rcbag_key)))
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#define RCBAG_PTR_ADDR(block, index, maxrecs) \
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((rcbag_ptr_t *) \
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((char *)(block) + RCBAG_BLOCK_LEN + \
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(maxrecs) * sizeof(struct rcbag_key) + \
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((index) - 1) * sizeof(rcbag_ptr_t)))
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unsigned int rcbagbt_maxrecs(struct xfs_mount *mp, unsigned int blocklen,
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bool leaf);
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unsigned long long rcbagbt_calc_size(unsigned long long nr_records);
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unsigned int rcbagbt_maxlevels_possible(void);
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int __init rcbagbt_init_cur_cache(void);
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void rcbagbt_destroy_cur_cache(void);
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struct xfs_btree_cur *rcbagbt_mem_cursor(struct xfs_mount *mp,
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struct xfs_trans *tp, struct xfbtree *xfbtree);
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int rcbagbt_mem_init(struct xfs_mount *mp, struct xfbtree *xfbtree,
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struct xfs_buftarg *btp);
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int rcbagbt_lookup_eq(struct xfs_btree_cur *cur,
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const struct xfs_rmap_irec *rmap, int *success);
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int rcbagbt_get_rec(struct xfs_btree_cur *cur, struct rcbag_rec *rec, int *has);
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int rcbagbt_update(struct xfs_btree_cur *cur, const struct rcbag_rec *rec);
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int rcbagbt_insert(struct xfs_btree_cur *cur, const struct rcbag_rec *rec,
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int *success);
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#else
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# define rcbagbt_init_cur_cache() 0
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# define rcbagbt_destroy_cur_cache() ((void)0)
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#endif /* CONFIG_XFS_BTREE_IN_MEM */
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#endif /* __XFS_SCRUB_RCBAG_BTREE_H__ */
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