linux/fs/xfs/scrub/quota_repair.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Copyright (C) 2018-2023 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_defer.h"
#include "xfs_btree.h"
#include "xfs_bit.h"
#include "xfs_log_format.h"
#include "xfs_trans.h"
#include "xfs_sb.h"
#include "xfs_inode.h"
#include "xfs_inode_fork.h"
#include "xfs_alloc.h"
#include "xfs_bmap.h"
#include "xfs_quota.h"
#include "xfs_qm.h"
#include "xfs_dquot.h"
#include "xfs_dquot_item.h"
#include "xfs_reflink.h"
#include "xfs_bmap_btree.h"
#include "xfs_trans_space.h"
#include "scrub/xfs_scrub.h"
#include "scrub/scrub.h"
#include "scrub/common.h"
#include "scrub/quota.h"
#include "scrub/trace.h"
#include "scrub/repair.h"

/*
 * Quota Repair
 * ============
 *
 * Quota repairs are fairly simplistic; we fix everything that the dquot
 * verifiers complain about, cap any counters or limits that make no sense,
 * and schedule a quotacheck if we had to fix anything.  We also repair any
 * data fork extent records that don't apply to metadata files.
 */

struct xrep_quota_info { … };

/*
 * Allocate a new block into a sparse hole in the quota file backing this
 * dquot, initialize the block, and commit the whole mess.
 */
STATIC int
xrep_quota_item_fill_bmap_hole(
	struct xfs_scrub	*sc,
	struct xfs_dquot	*dq,
	struct xfs_bmbt_irec	*irec)
{ … }

/* Make sure there's a written block backing this dquot */
STATIC int
xrep_quota_item_bmap(
	struct xfs_scrub	*sc,
	struct xfs_dquot	*dq,
	bool			*dirty)
{ … }

/* Reset quota timers if incorrectly set. */
static inline void
xrep_quota_item_timer(
	struct xfs_scrub		*sc,
	const struct xfs_dquot_res	*res,
	bool				*dirty)
{ … }

/* Scrub the fields in an individual quota item. */
STATIC int
xrep_quota_item(
	struct xrep_quota_info	*rqi,
	struct xfs_dquot	*dq)
{ … }

/* Fix a quota timer so that we can pass the verifier. */
STATIC void
xrep_quota_fix_timer(
	struct xfs_mount	*mp,
	const struct xfs_disk_dquot *ddq,
	__be64			softlimit,
	__be64			countnow,
	__be32			*timer,
	time64_t		timelimit)
{ … }

/* Fix anything the verifiers complain about. */
STATIC int
xrep_quota_block(
	struct xfs_scrub	*sc,
	xfs_daddr_t		daddr,
	xfs_dqtype_t		dqtype,
	xfs_dqid_t		id)
{ … }

/*
 * Repair a quota file's data fork.  The function returns with the inode
 * joined.
 */
STATIC int
xrep_quota_data_fork(
	struct xfs_scrub	*sc,
	xfs_dqtype_t		dqtype)
{ … }

/*
 * Go fix anything in the quota items that we could have been mad about.  Now
 * that we've checked the quota inode data fork we have to drop ILOCK_EXCL to
 * use the regular dquot functions.
 */
STATIC int
xrep_quota_problems(
	struct xfs_scrub	*sc,
	xfs_dqtype_t		dqtype)
{ … }

/* Repair all of a quota type's items. */
int
xrep_quota(
	struct xfs_scrub	*sc)
{ … }