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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (C) 2017-2023 Oracle. All Rights Reserved.
* Author: Darrick J. Wong <djwong@kernel.org>
*/
#ifndef __XFS_SCRUB_REFCOUNT_H__
#define __XFS_SCRUB_REFCOUNT_H__
/*
* Ensure that types and macros match across rt and non-rt variants,
* as this code is shared for both.
*/
static_assert(__same_type(xfs_agblock_t, xfs_rgblock_t));
static_assert(NULLAGBLOCK == NULLRGBLOCK);
/*
* Confirming reference counts via reverse mappings.
*
* These helpers are shared by the AG (refcount.c) and realtime
* (rtrefcount.c) refcount scrubbers. Both the rmap and refcount incore
* records use xfs_agblock_t for their start block regardless of whether the
* data lives in an allocation group or a realtime group, so the fragment
* bookkeeping here uses xfs_agblock_t for group-relative block numbers.
*/
struct xchk_refcnt_frag {
struct list_head list;
struct xfs_rmap_irec rm;
};
struct xchk_refcnt_check {
struct xfs_scrub *sc;
struct list_head fragments;
/* refcount extent we're examining */
xfs_agblock_t bno;
xfs_extlen_t len;
xfs_nlink_t refcount;
/* number of owners seen */
xfs_nlink_t seen;
};
int xchk_refcountbt_rmap_check(struct xfs_btree_cur *cur,
const struct xfs_rmap_irec *rec, void *priv);
void xchk_refcountbt_process_rmap_fragments(struct xchk_refcnt_check *refchk);
int xchk_refcountbt_rmap_check_gap(struct xfs_btree_cur *cur,
const struct xfs_rmap_irec *rec, void *priv);
/*
* Compare two refcount records so that both the AG (refcount_repair.c) and
* realtime (rtrefcount_repair.c) rebuilders sort staged records into the same
* order as the ondisk records.
*/
int xrep_refc_extent_cmp(const void *a, const void *b);
#endif /* __XFS_SCRUB_REFCOUNT_H__ */
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