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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (c) 2022-2024 Oracle. All Rights Reserved.
* Author: Darrick J. Wong <djwong@kernel.org>
*/
#ifndef __XFS_SCRUB_RCBAG_BTREE_H__
#define __XFS_SCRUB_RCBAG_BTREE_H__
#ifdef CONFIG_XFS_BTREE_IN_MEM
struct xfs_buf;
struct xfs_btree_cur;
struct xfs_mount;
#define RCBAG_MAGIC 0x74826671 /* 'JRBG' */
struct rcbag_key {
uint32_t rbg_startblock;
uint32_t rbg_blockcount;
};
struct rcbag_rec {
uint32_t rbg_startblock;
uint32_t rbg_blockcount;
uint64_t rbg_refcount;
};
typedef __be64 rcbag_ptr_t;
/* reflinks only exist on crc enabled filesystems */
#define RCBAG_BLOCK_LEN XFS_BTREE_LBLOCK_CRC_LEN
/*
* Record, key, and pointer address macros for btree blocks.
*
* (note that some of these may appear unused, but they are used in userspace)
*/
#define RCBAG_REC_ADDR(block, index) \
((struct rcbag_rec *) \
((char *)(block) + RCBAG_BLOCK_LEN + \
(((index) - 1) * sizeof(struct rcbag_rec))))
#define RCBAG_KEY_ADDR(block, index) \
((struct rcbag_key *) \
((char *)(block) + RCBAG_BLOCK_LEN + \
((index) - 1) * sizeof(struct rcbag_key)))
#define RCBAG_PTR_ADDR(block, index, maxrecs) \
((rcbag_ptr_t *) \
((char *)(block) + RCBAG_BLOCK_LEN + \
(maxrecs) * sizeof(struct rcbag_key) + \
((index) - 1) * sizeof(rcbag_ptr_t)))
unsigned int rcbagbt_maxrecs(struct xfs_mount *mp, unsigned int blocklen,
bool leaf);
unsigned long long rcbagbt_calc_size(unsigned long long nr_records);
unsigned int rcbagbt_maxlevels_possible(void);
int __init rcbagbt_init_cur_cache(void);
void rcbagbt_destroy_cur_cache(void);
struct xfs_btree_cur *rcbagbt_mem_cursor(struct xfs_mount *mp,
struct xfs_trans *tp, struct xfbtree *xfbtree);
int rcbagbt_mem_init(struct xfs_mount *mp, struct xfbtree *xfbtree,
struct xfs_buftarg *btp);
int rcbagbt_lookup_eq(struct xfs_btree_cur *cur,
const struct xfs_rmap_irec *rmap, int *success);
int rcbagbt_get_rec(struct xfs_btree_cur *cur, struct rcbag_rec *rec, int *has);
int rcbagbt_update(struct xfs_btree_cur *cur, const struct rcbag_rec *rec);
int rcbagbt_insert(struct xfs_btree_cur *cur, const struct rcbag_rec *rec,
int *success);
#else
# define rcbagbt_init_cur_cache() 0
# define rcbagbt_destroy_cur_cache() ((void)0)
#endif /* CONFIG_XFS_BTREE_IN_MEM */
#endif /* __XFS_SCRUB_RCBAG_BTREE_H__ */
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