linux/fs/xfs/scrub/rtsummary.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Copyright (C) 2017-2023 Oracle.  All Rights Reserved.
 * Author: Darrick J. Wong <[email protected]>
 */
#include "xfs.h"
#include "xfs_fs.h"
#include "xfs_shared.h"
#include "xfs_format.h"
#include "xfs_trans_resv.h"
#include "xfs_mount.h"
#include "xfs_btree.h"
#include "xfs_inode.h"
#include "xfs_log_format.h"
#include "xfs_trans.h"
#include "xfs_rtbitmap.h"
#include "xfs_bit.h"
#include "xfs_bmap.h"
#include "xfs_sb.h"
#include "xfs_exchmaps.h"
#include "scrub/scrub.h"
#include "scrub/common.h"
#include "scrub/trace.h"
#include "scrub/xfile.h"
#include "scrub/repair.h"
#include "scrub/tempexch.h"
#include "scrub/rtsummary.h"

/*
 * Realtime Summary
 * ================
 *
 * We check the realtime summary by scanning the realtime bitmap file to create
 * a new summary file incore, and then we compare the computed version against
 * the ondisk version.  We use the 'xfile' functionality to store this
 * (potentially large) amount of data in pageable memory.
 */

/* Set us up to check the rtsummary file. */
int
xchk_setup_rtsummary(
	struct xfs_scrub	*sc)
{ … }

/* Helper functions to record suminfo words in an xfile. */

static inline int
xfsum_load(
	struct xfs_scrub	*sc,
	xfs_rtsumoff_t		sumoff,
	union xfs_suminfo_raw	*rawinfo)
{ … }

static inline int
xfsum_store(
	struct xfs_scrub	*sc,
	xfs_rtsumoff_t		sumoff,
	const union xfs_suminfo_raw rawinfo)
{ … }

inline int
xfsum_copyout(
	struct xfs_scrub	*sc,
	xfs_rtsumoff_t		sumoff,
	union xfs_suminfo_raw	*rawinfo,
	unsigned int		nr_words)
{ … }

static inline xfs_suminfo_t
xchk_rtsum_inc(
	struct xfs_mount	*mp,
	union xfs_suminfo_raw	*v)
{ … }

/* Update the summary file to reflect the free extent that we've accumulated. */
STATIC int
xchk_rtsum_record_free(
	struct xfs_mount		*mp,
	struct xfs_trans		*tp,
	const struct xfs_rtalloc_rec	*rec,
	void				*priv)
{ … }

/* Compute the realtime summary from the realtime bitmap. */
STATIC int
xchk_rtsum_compute(
	struct xfs_scrub	*sc)
{ … }

/* Compare the rtsummary file against the one we computed. */
STATIC int
xchk_rtsum_compare(
	struct xfs_scrub	*sc)
{ … }

/* Scrub the realtime summary. */
int
xchk_rtsummary(
	struct xfs_scrub	*sc)
{ … }