linux/fs/xfs/scrub/dqiterate.c

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

/* Initialize a dquot iteration cursor. */
void
xchk_dqiter_init(
	struct xchk_dqiter	*cursor,
	struct xfs_scrub	*sc,
	xfs_dqtype_t		dqtype)
{ … }

/*
 * Ensure that the cached data fork mapping for the dqiter cursor is fresh and
 * covers the dquot pointed to by the scan cursor.
 */
STATIC int
xchk_dquot_iter_revalidate_bmap(
	struct xchk_dqiter	*cursor)
{ … }

/* Advance the dqiter cursor to the next non-sparse region of the quota file. */
STATIC int
xchk_dquot_iter_advance_bmap(
	struct xchk_dqiter	*cursor,
	uint64_t		*next_ondisk_id)
{ … }

/*
 * Find the id of the next highest incore dquot.  Normally this will correspond
 * exactly with the quota file block mappings, but repair might have erased a
 * mapping because it was crosslinked; in that case, we need to re-allocate the
 * space so that we can reset q_blkno.
 */
STATIC void
xchk_dquot_iter_advance_incore(
	struct xchk_dqiter	*cursor,
	uint64_t		*next_incore_id)
{ … }

/*
 * Walk all incore dquots of this filesystem.  Caller must set *@cursorp to
 * zero before the first call, and must not hold the quota file ILOCK.
 * Returns 1 and a valid *@dqpp; 0 and *@dqpp == NULL when there are no more
 * dquots to iterate; or a negative errno.
 */
int
xchk_dquot_iter(
	struct xchk_dqiter	*cursor,
	struct xfs_dquot	**dqpp)
{ … }