fs/xfs/scrub/repair.h

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Copyright (C) 2018-2023 Oracle.  All Rights Reserved.
 * Author: Darrick J. Wong <djwong@kernel.org>
 */
#ifndef __XFS_SCRUB_REPAIR_H__
#define __XFS_SCRUB_REPAIR_H__

#include "xfs_quota_defs.h"

struct xchk_stats_run;

static inline int xrep_notsupported(struct xfs_scrub *sc)
{
	return -EOPNOTSUPP;
}

#ifdef CONFIG_XFS_ONLINE_REPAIR

/*
 * This is the maximum number of deferred extent freeing item extents (EFIs)
 * that we'll attach to a transaction without rolling the transaction to avoid
 * overrunning a tr_itruncate reservation.
 */
#define XREP_MAX_ITRUNCATE_EFIS	(128)


/* Repair helpers */

int xrep_attempt(struct xfs_scrub *sc, struct xchk_stats_run *run);
void xrep_failure(struct xfs_mount *mp);
int xrep_roll_ag_trans(struct xfs_scrub *sc);
int xrep_defer_finish(struct xfs_scrub *sc);
bool xrep_ag_has_space(struct xfs_perag *pag, xfs_extlen_t nr_blocks,
		enum xfs_ag_resv_type type);
xfs_extlen_t xrep_calc_ag_resblks(struct xfs_scrub *sc);

struct xbitmap;
struct xagb_bitmap;

int xrep_fix_freelist(struct xfs_scrub *sc, bool can_shrink);

struct xrep_find_ag_btree {
	/* in: rmap owner of the btree we're looking for */
	uint64_t			rmap_owner;

	/* in: buffer ops */
	const struct xfs_buf_ops	*buf_ops;

	/* in: maximum btree height */
	unsigned int			maxlevels;

	/* out: the highest btree block found and the tree height */
	xfs_agblock_t			root;
	unsigned int			height;
};

int xrep_find_ag_btree_roots(struct xfs_scrub *sc, struct xfs_buf *agf_bp,
		struct xrep_find_ag_btree *btree_info, struct xfs_buf *agfl_bp);
void xrep_force_quotacheck(struct xfs_scrub *sc, xfs_dqtype_t type);
int xrep_ino_dqattach(struct xfs_scrub *sc);

/* Metadata repairers */

int xrep_probe(struct xfs_scrub *sc);
int xrep_superblock(struct xfs_scrub *sc);
int xrep_agf(struct xfs_scrub *sc);
int xrep_agfl(struct xfs_scrub *sc);
int xrep_agi(struct xfs_scrub *sc);

#else

static inline int
xrep_attempt(
	struct xfs_scrub	*sc,
	struct xchk_stats_run	*run)
{
	return -EOPNOTSUPP;
}

static inline void xrep_failure(struct xfs_mount *mp) {}

static inline xfs_extlen_t
xrep_calc_ag_resblks(
	struct xfs_scrub	*sc)
{
	return 0;
}

#define xrep_probe			xrep_notsupported
#define xrep_superblock			xrep_notsupported
#define xrep_agf			xrep_notsupported
#define xrep_agfl			xrep_notsupported
#define xrep_agi			xrep_notsupported

#endif /* CONFIG_XFS_ONLINE_REPAIR */

#endif	/* __XFS_SCRUB_REPAIR_H__ */