linux/fs/xfs/scrub/inode.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_log_format.h"
#include "xfs_trans.h"
#include "xfs_ag.h"
#include "xfs_inode.h"
#include "xfs_ialloc.h"
#include "xfs_icache.h"
#include "xfs_da_format.h"
#include "xfs_reflink.h"
#include "xfs_rmap.h"
#include "xfs_bmap_util.h"
#include "xfs_rtbitmap.h"
#include "scrub/scrub.h"
#include "scrub/common.h"
#include "scrub/btree.h"
#include "scrub/trace.h"
#include "scrub/repair.h"

/* Prepare the attached inode for scrubbing. */
static inline int
xchk_prepare_iscrub(
	struct xfs_scrub	*sc)
{ … }

/* Install this scrub-by-handle inode and prepare it for scrubbing. */
static inline int
xchk_install_handle_iscrub(
	struct xfs_scrub	*sc,
	struct xfs_inode	*ip)
{ … }

/*
 * Grab total control of the inode metadata.  In the best case, we grab the
 * incore inode and take all locks on it.  If the incore inode cannot be
 * constructed due to corruption problems, lock the AGI so that we can single
 * step the loading process to fix everything that can go wrong.
 */
int
xchk_setup_inode(
	struct xfs_scrub	*sc)
{ … }

/* Inode core */

/* Validate di_extsize hint. */
STATIC void
xchk_inode_extsize(
	struct xfs_scrub	*sc,
	struct xfs_dinode	*dip,
	xfs_ino_t		ino,
	uint16_t		mode,
	uint16_t		flags)
{ … }

/*
 * Validate di_cowextsize hint.
 *
 * The rules are documented at xfs_ioctl_setattr_check_cowextsize().
 * These functions must be kept in sync with each other.
 */
STATIC void
xchk_inode_cowextsize(
	struct xfs_scrub	*sc,
	struct xfs_dinode	*dip,
	xfs_ino_t		ino,
	uint16_t		mode,
	uint16_t		flags,
	uint64_t		flags2)
{ … }

/* Make sure the di_flags make sense for the inode. */
STATIC void
xchk_inode_flags(
	struct xfs_scrub	*sc,
	struct xfs_dinode	*dip,
	xfs_ino_t		ino,
	uint16_t		mode,
	uint16_t		flags)
{ … }

/* Make sure the di_flags2 make sense for the inode. */
STATIC void
xchk_inode_flags2(
	struct xfs_scrub	*sc,
	struct xfs_dinode	*dip,
	xfs_ino_t		ino,
	uint16_t		mode,
	uint16_t		flags,
	uint64_t		flags2)
{ … }

static inline void
xchk_dinode_nsec(
	struct xfs_scrub	*sc,
	xfs_ino_t		ino,
	struct xfs_dinode	*dip,
	const xfs_timestamp_t	ts)
{ … }

/* Scrub all the ondisk inode fields. */
STATIC void
xchk_dinode(
	struct xfs_scrub	*sc,
	struct xfs_dinode	*dip,
	xfs_ino_t		ino)
{ … }

/*
 * Make sure the finobt doesn't think this inode is free.
 * We don't have to check the inobt ourselves because we got the inode via
 * IGET_UNTRUSTED, which checks the inobt for us.
 */
static void
xchk_inode_xref_finobt(
	struct xfs_scrub		*sc,
	xfs_ino_t			ino)
{ … }

/* Cross reference the inode fields with the forks. */
STATIC void
xchk_inode_xref_bmap(
	struct xfs_scrub	*sc,
	struct xfs_dinode	*dip)
{ … }

/* Cross-reference with the other btrees. */
STATIC void
xchk_inode_xref(
	struct xfs_scrub	*sc,
	xfs_ino_t		ino,
	struct xfs_dinode	*dip)
{ … }

/*
 * If the reflink iflag disagrees with a scan for shared data fork extents,
 * either flag an error (shared extents w/ no flag) or a preen (flag set w/o
 * any shared extents).  We already checked for reflink iflag set on a non
 * reflink filesystem.
 */
static void
xchk_inode_check_reflink_iflag(
	struct xfs_scrub	*sc,
	xfs_ino_t		ino)
{ … }

/*
 * If this inode has zero link count, it must be on the unlinked list.  If
 * it has nonzero link count, it must not be on the unlinked list.
 */
STATIC void
xchk_inode_check_unlinked(
	struct xfs_scrub	*sc)
{ … }

/* Scrub an inode. */
int
xchk_inode(
	struct xfs_scrub	*sc)
{ … }