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![Darrick J. Wong](/assets/img/avatar_default.png)
Teach scrub to flag extent maps that exceed the range that can be mapped with a xfs_dablk_t. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Brian Foster <bfoster@redhat.com>
746 lines
19 KiB
C
746 lines
19 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2017 Oracle. All Rights Reserved.
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* Author: Darrick J. Wong <darrick.wong@oracle.com>
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*/
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#include "xfs.h"
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#include "xfs_fs.h"
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#include "xfs_shared.h"
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#include "xfs_format.h"
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#include "xfs_trans_resv.h"
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#include "xfs_mount.h"
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#include "xfs_defer.h"
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#include "xfs_btree.h"
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#include "xfs_bit.h"
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#include "xfs_log_format.h"
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#include "xfs_trans.h"
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#include "xfs_sb.h"
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#include "xfs_inode.h"
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#include "xfs_inode_fork.h"
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#include "xfs_alloc.h"
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#include "xfs_rtalloc.h"
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#include "xfs_bmap.h"
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#include "xfs_bmap_util.h"
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#include "xfs_bmap_btree.h"
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#include "xfs_rmap.h"
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#include "xfs_rmap_btree.h"
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#include "xfs_refcount.h"
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#include "scrub/xfs_scrub.h"
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#include "scrub/scrub.h"
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#include "scrub/common.h"
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#include "scrub/btree.h"
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#include "scrub/trace.h"
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/* Set us up with an inode's bmap. */
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int
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xchk_setup_inode_bmap(
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struct xfs_scrub *sc,
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struct xfs_inode *ip)
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{
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int error;
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error = xchk_get_inode(sc, ip);
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if (error)
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goto out;
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sc->ilock_flags = XFS_IOLOCK_EXCL | XFS_MMAPLOCK_EXCL;
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xfs_ilock(sc->ip, sc->ilock_flags);
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/*
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* We don't want any ephemeral data fork updates sitting around
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* while we inspect block mappings, so wait for directio to finish
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* and flush dirty data if we have delalloc reservations.
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*/
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if (S_ISREG(VFS_I(sc->ip)->i_mode) &&
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sc->sm->sm_type == XFS_SCRUB_TYPE_BMBTD) {
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inode_dio_wait(VFS_I(sc->ip));
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error = filemap_write_and_wait(VFS_I(sc->ip)->i_mapping);
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if (error)
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goto out;
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}
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/* Got the inode, lock it and we're ready to go. */
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error = xchk_trans_alloc(sc, 0);
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if (error)
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goto out;
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sc->ilock_flags |= XFS_ILOCK_EXCL;
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xfs_ilock(sc->ip, XFS_ILOCK_EXCL);
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out:
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/* scrub teardown will unlock and release the inode */
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return error;
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}
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/*
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* Inode fork block mapping (BMBT) scrubber.
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* More complex than the others because we have to scrub
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* all the extents regardless of whether or not the fork
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* is in btree format.
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*/
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struct xchk_bmap_info {
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struct xfs_scrub *sc;
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xfs_fileoff_t lastoff;
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bool is_rt;
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bool is_shared;
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int whichfork;
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};
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/* Look for a corresponding rmap for this irec. */
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static inline bool
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xchk_bmap_get_rmap(
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struct xchk_bmap_info *info,
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struct xfs_bmbt_irec *irec,
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xfs_agblock_t agbno,
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uint64_t owner,
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struct xfs_rmap_irec *rmap)
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{
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xfs_fileoff_t offset;
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unsigned int rflags = 0;
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int has_rmap;
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int error;
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if (info->whichfork == XFS_ATTR_FORK)
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rflags |= XFS_RMAP_ATTR_FORK;
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/*
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* CoW staging extents are owned (on disk) by the refcountbt, so
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* their rmaps do not have offsets.
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*/
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if (info->whichfork == XFS_COW_FORK)
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offset = 0;
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else
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offset = irec->br_startoff;
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/*
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* If the caller thinks this could be a shared bmbt extent (IOWs,
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* any data fork extent of a reflink inode) then we have to use the
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* range rmap lookup to make sure we get the correct owner/offset.
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*/
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if (info->is_shared) {
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error = xfs_rmap_lookup_le_range(info->sc->sa.rmap_cur, agbno,
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owner, offset, rflags, rmap, &has_rmap);
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if (!xchk_should_check_xref(info->sc, &error,
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&info->sc->sa.rmap_cur))
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return false;
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goto out;
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}
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/*
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* Otherwise, use the (faster) regular lookup.
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*/
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error = xfs_rmap_lookup_le(info->sc->sa.rmap_cur, agbno, 0, owner,
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offset, rflags, &has_rmap);
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if (!xchk_should_check_xref(info->sc, &error,
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&info->sc->sa.rmap_cur))
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return false;
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if (!has_rmap)
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goto out;
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error = xfs_rmap_get_rec(info->sc->sa.rmap_cur, rmap, &has_rmap);
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if (!xchk_should_check_xref(info->sc, &error,
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&info->sc->sa.rmap_cur))
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return false;
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out:
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if (!has_rmap)
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xchk_fblock_xref_set_corrupt(info->sc, info->whichfork,
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irec->br_startoff);
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return has_rmap;
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}
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/* Make sure that we have rmapbt records for this extent. */
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STATIC void
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xchk_bmap_xref_rmap(
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struct xchk_bmap_info *info,
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struct xfs_bmbt_irec *irec,
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xfs_agblock_t agbno)
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{
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struct xfs_rmap_irec rmap;
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unsigned long long rmap_end;
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uint64_t owner;
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if (!info->sc->sa.rmap_cur || xchk_skip_xref(info->sc->sm))
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return;
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if (info->whichfork == XFS_COW_FORK)
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owner = XFS_RMAP_OWN_COW;
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else
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owner = info->sc->ip->i_ino;
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/* Find the rmap record for this irec. */
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if (!xchk_bmap_get_rmap(info, irec, agbno, owner, &rmap))
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return;
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/* Check the rmap. */
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rmap_end = (unsigned long long)rmap.rm_startblock + rmap.rm_blockcount;
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if (rmap.rm_startblock > agbno ||
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agbno + irec->br_blockcount > rmap_end)
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xchk_fblock_xref_set_corrupt(info->sc, info->whichfork,
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irec->br_startoff);
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/*
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* Check the logical offsets if applicable. CoW staging extents
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* don't track logical offsets since the mappings only exist in
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* memory.
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*/
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if (info->whichfork != XFS_COW_FORK) {
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rmap_end = (unsigned long long)rmap.rm_offset +
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rmap.rm_blockcount;
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if (rmap.rm_offset > irec->br_startoff ||
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irec->br_startoff + irec->br_blockcount > rmap_end)
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xchk_fblock_xref_set_corrupt(info->sc,
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info->whichfork, irec->br_startoff);
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}
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if (rmap.rm_owner != owner)
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xchk_fblock_xref_set_corrupt(info->sc, info->whichfork,
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irec->br_startoff);
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/*
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* Check for discrepancies between the unwritten flag in the irec and
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* the rmap. Note that the (in-memory) CoW fork distinguishes between
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* unwritten and written extents, but we don't track that in the rmap
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* records because the blocks are owned (on-disk) by the refcountbt,
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* which doesn't track unwritten state.
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*/
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if (owner != XFS_RMAP_OWN_COW &&
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irec->br_state == XFS_EXT_UNWRITTEN &&
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!(rmap.rm_flags & XFS_RMAP_UNWRITTEN))
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xchk_fblock_xref_set_corrupt(info->sc, info->whichfork,
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irec->br_startoff);
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if (info->whichfork == XFS_ATTR_FORK &&
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!(rmap.rm_flags & XFS_RMAP_ATTR_FORK))
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xchk_fblock_xref_set_corrupt(info->sc, info->whichfork,
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irec->br_startoff);
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if (rmap.rm_flags & XFS_RMAP_BMBT_BLOCK)
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xchk_fblock_xref_set_corrupt(info->sc, info->whichfork,
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irec->br_startoff);
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}
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/* Cross-reference a single rtdev extent record. */
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STATIC void
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xchk_bmap_rt_extent_xref(
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struct xchk_bmap_info *info,
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struct xfs_inode *ip,
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struct xfs_btree_cur *cur,
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struct xfs_bmbt_irec *irec)
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{
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if (info->sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
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return;
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xchk_xref_is_used_rt_space(info->sc, irec->br_startblock,
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irec->br_blockcount);
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}
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/* Cross-reference a single datadev extent record. */
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STATIC void
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xchk_bmap_extent_xref(
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struct xchk_bmap_info *info,
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struct xfs_inode *ip,
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struct xfs_btree_cur *cur,
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struct xfs_bmbt_irec *irec)
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{
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struct xfs_mount *mp = info->sc->mp;
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xfs_agnumber_t agno;
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xfs_agblock_t agbno;
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xfs_extlen_t len;
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int error;
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if (info->sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
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return;
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agno = XFS_FSB_TO_AGNO(mp, irec->br_startblock);
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agbno = XFS_FSB_TO_AGBNO(mp, irec->br_startblock);
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len = irec->br_blockcount;
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error = xchk_ag_init(info->sc, agno, &info->sc->sa);
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if (!xchk_fblock_process_error(info->sc, info->whichfork,
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irec->br_startoff, &error))
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return;
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xchk_xref_is_used_space(info->sc, agbno, len);
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xchk_xref_is_not_inode_chunk(info->sc, agbno, len);
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xchk_bmap_xref_rmap(info, irec, agbno);
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switch (info->whichfork) {
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case XFS_DATA_FORK:
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if (xfs_is_reflink_inode(info->sc->ip))
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break;
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/* fall through */
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case XFS_ATTR_FORK:
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xchk_xref_is_not_shared(info->sc, agbno,
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irec->br_blockcount);
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break;
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case XFS_COW_FORK:
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xchk_xref_is_cow_staging(info->sc, agbno,
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irec->br_blockcount);
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break;
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}
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xchk_ag_free(info->sc, &info->sc->sa);
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}
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/*
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* Directories and attr forks should never have blocks that can't be addressed
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* by a xfs_dablk_t.
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*/
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STATIC void
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xchk_bmap_dirattr_extent(
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struct xfs_inode *ip,
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struct xchk_bmap_info *info,
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struct xfs_bmbt_irec *irec)
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{
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struct xfs_mount *mp = ip->i_mount;
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xfs_fileoff_t off;
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if (!S_ISDIR(VFS_I(ip)->i_mode) && info->whichfork != XFS_ATTR_FORK)
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return;
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if (!xfs_verify_dablk(mp, irec->br_startoff))
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xchk_fblock_set_corrupt(info->sc, info->whichfork,
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irec->br_startoff);
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off = irec->br_startoff + irec->br_blockcount - 1;
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if (!xfs_verify_dablk(mp, off))
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xchk_fblock_set_corrupt(info->sc, info->whichfork, off);
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}
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/* Scrub a single extent record. */
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STATIC int
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xchk_bmap_extent(
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struct xfs_inode *ip,
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struct xfs_btree_cur *cur,
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struct xchk_bmap_info *info,
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struct xfs_bmbt_irec *irec)
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{
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struct xfs_mount *mp = info->sc->mp;
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struct xfs_buf *bp = NULL;
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xfs_filblks_t end;
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int error = 0;
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if (cur)
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xfs_btree_get_block(cur, 0, &bp);
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/*
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* Check for out-of-order extents. This record could have come
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* from the incore list, for which there is no ordering check.
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*/
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if (irec->br_startoff < info->lastoff)
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xchk_fblock_set_corrupt(info->sc, info->whichfork,
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irec->br_startoff);
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xchk_bmap_dirattr_extent(ip, info, irec);
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/* There should never be a "hole" extent in either extent list. */
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if (irec->br_startblock == HOLESTARTBLOCK)
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xchk_fblock_set_corrupt(info->sc, info->whichfork,
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irec->br_startoff);
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/*
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* Check for delalloc extents. We never iterate the ones in the
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* in-core extent scan, and we should never see these in the bmbt.
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*/
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if (isnullstartblock(irec->br_startblock))
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xchk_fblock_set_corrupt(info->sc, info->whichfork,
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irec->br_startoff);
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/* Make sure the extent points to a valid place. */
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if (irec->br_blockcount > MAXEXTLEN)
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xchk_fblock_set_corrupt(info->sc, info->whichfork,
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irec->br_startoff);
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if (irec->br_startblock + irec->br_blockcount <= irec->br_startblock)
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xchk_fblock_set_corrupt(info->sc, info->whichfork,
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irec->br_startoff);
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end = irec->br_startblock + irec->br_blockcount - 1;
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if (info->is_rt &&
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(!xfs_verify_rtbno(mp, irec->br_startblock) ||
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!xfs_verify_rtbno(mp, end)))
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xchk_fblock_set_corrupt(info->sc, info->whichfork,
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irec->br_startoff);
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if (!info->is_rt &&
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(!xfs_verify_fsbno(mp, irec->br_startblock) ||
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!xfs_verify_fsbno(mp, end) ||
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XFS_FSB_TO_AGNO(mp, irec->br_startblock) !=
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XFS_FSB_TO_AGNO(mp, end)))
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xchk_fblock_set_corrupt(info->sc, info->whichfork,
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irec->br_startoff);
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/* We don't allow unwritten extents on attr forks. */
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if (irec->br_state == XFS_EXT_UNWRITTEN &&
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info->whichfork == XFS_ATTR_FORK)
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xchk_fblock_set_corrupt(info->sc, info->whichfork,
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irec->br_startoff);
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if (info->is_rt)
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xchk_bmap_rt_extent_xref(info, ip, cur, irec);
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else
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xchk_bmap_extent_xref(info, ip, cur, irec);
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info->lastoff = irec->br_startoff + irec->br_blockcount;
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return error;
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}
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/* Scrub a bmbt record. */
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STATIC int
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xchk_bmapbt_rec(
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struct xchk_btree *bs,
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union xfs_btree_rec *rec)
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{
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struct xfs_bmbt_irec irec;
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struct xchk_bmap_info *info = bs->private;
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struct xfs_inode *ip = bs->cur->bc_private.b.ip;
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struct xfs_buf *bp = NULL;
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struct xfs_btree_block *block;
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uint64_t owner;
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int i;
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|
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/*
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* Check the owners of the btree blocks up to the level below
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* the root since the verifiers don't do that.
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*/
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if (xfs_sb_version_hascrc(&bs->cur->bc_mp->m_sb) &&
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bs->cur->bc_ptrs[0] == 1) {
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for (i = 0; i < bs->cur->bc_nlevels - 1; i++) {
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block = xfs_btree_get_block(bs->cur, i, &bp);
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owner = be64_to_cpu(block->bb_u.l.bb_owner);
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if (owner != ip->i_ino)
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xchk_fblock_set_corrupt(bs->sc,
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info->whichfork, 0);
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}
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}
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/* Set up the in-core record and scrub it. */
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xfs_bmbt_disk_get_all(&rec->bmbt, &irec);
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return xchk_bmap_extent(ip, bs->cur, info, &irec);
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}
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/* Scan the btree records. */
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STATIC int
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xchk_bmap_btree(
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struct xfs_scrub *sc,
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int whichfork,
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struct xchk_bmap_info *info)
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{
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struct xfs_owner_info oinfo;
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struct xfs_mount *mp = sc->mp;
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struct xfs_inode *ip = sc->ip;
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struct xfs_btree_cur *cur;
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int error;
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cur = xfs_bmbt_init_cursor(mp, sc->tp, ip, whichfork);
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xfs_rmap_ino_bmbt_owner(&oinfo, ip->i_ino, whichfork);
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error = xchk_btree(sc, cur, xchk_bmapbt_rec, &oinfo, info);
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xfs_btree_del_cursor(cur, error);
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return error;
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}
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|
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struct xchk_bmap_check_rmap_info {
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struct xfs_scrub *sc;
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int whichfork;
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struct xfs_iext_cursor icur;
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};
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|
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/* Can we find bmaps that fit this rmap? */
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STATIC int
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xchk_bmap_check_rmap(
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struct xfs_btree_cur *cur,
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struct xfs_rmap_irec *rec,
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void *priv)
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{
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struct xfs_bmbt_irec irec;
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struct xchk_bmap_check_rmap_info *sbcri = priv;
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struct xfs_ifork *ifp;
|
|
struct xfs_scrub *sc = sbcri->sc;
|
|
bool have_map;
|
|
|
|
/* Is this even the right fork? */
|
|
if (rec->rm_owner != sc->ip->i_ino)
|
|
return 0;
|
|
if ((sbcri->whichfork == XFS_ATTR_FORK) ^
|
|
!!(rec->rm_flags & XFS_RMAP_ATTR_FORK))
|
|
return 0;
|
|
if (rec->rm_flags & XFS_RMAP_BMBT_BLOCK)
|
|
return 0;
|
|
|
|
/* Now look up the bmbt record. */
|
|
ifp = XFS_IFORK_PTR(sc->ip, sbcri->whichfork);
|
|
if (!ifp) {
|
|
xchk_fblock_set_corrupt(sc, sbcri->whichfork,
|
|
rec->rm_offset);
|
|
goto out;
|
|
}
|
|
have_map = xfs_iext_lookup_extent(sc->ip, ifp, rec->rm_offset,
|
|
&sbcri->icur, &irec);
|
|
if (!have_map)
|
|
xchk_fblock_set_corrupt(sc, sbcri->whichfork,
|
|
rec->rm_offset);
|
|
/*
|
|
* bmap extent record lengths are constrained to 2^21 blocks in length
|
|
* because of space constraints in the on-disk metadata structure.
|
|
* However, rmap extent record lengths are constrained only by AG
|
|
* length, so we have to loop through the bmbt to make sure that the
|
|
* entire rmap is covered by bmbt records.
|
|
*/
|
|
while (have_map) {
|
|
if (irec.br_startoff != rec->rm_offset)
|
|
xchk_fblock_set_corrupt(sc, sbcri->whichfork,
|
|
rec->rm_offset);
|
|
if (irec.br_startblock != XFS_AGB_TO_FSB(sc->mp,
|
|
cur->bc_private.a.agno, rec->rm_startblock))
|
|
xchk_fblock_set_corrupt(sc, sbcri->whichfork,
|
|
rec->rm_offset);
|
|
if (irec.br_blockcount > rec->rm_blockcount)
|
|
xchk_fblock_set_corrupt(sc, sbcri->whichfork,
|
|
rec->rm_offset);
|
|
if (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
|
|
break;
|
|
rec->rm_startblock += irec.br_blockcount;
|
|
rec->rm_offset += irec.br_blockcount;
|
|
rec->rm_blockcount -= irec.br_blockcount;
|
|
if (rec->rm_blockcount == 0)
|
|
break;
|
|
have_map = xfs_iext_next_extent(ifp, &sbcri->icur, &irec);
|
|
if (!have_map)
|
|
xchk_fblock_set_corrupt(sc, sbcri->whichfork,
|
|
rec->rm_offset);
|
|
}
|
|
|
|
out:
|
|
if (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
|
|
return XFS_BTREE_QUERY_RANGE_ABORT;
|
|
return 0;
|
|
}
|
|
|
|
/* Make sure each rmap has a corresponding bmbt entry. */
|
|
STATIC int
|
|
xchk_bmap_check_ag_rmaps(
|
|
struct xfs_scrub *sc,
|
|
int whichfork,
|
|
xfs_agnumber_t agno)
|
|
{
|
|
struct xchk_bmap_check_rmap_info sbcri;
|
|
struct xfs_btree_cur *cur;
|
|
struct xfs_buf *agf;
|
|
int error;
|
|
|
|
error = xfs_alloc_read_agf(sc->mp, sc->tp, agno, 0, &agf);
|
|
if (error)
|
|
return error;
|
|
|
|
cur = xfs_rmapbt_init_cursor(sc->mp, sc->tp, agf, agno);
|
|
if (!cur) {
|
|
error = -ENOMEM;
|
|
goto out_agf;
|
|
}
|
|
|
|
sbcri.sc = sc;
|
|
sbcri.whichfork = whichfork;
|
|
error = xfs_rmap_query_all(cur, xchk_bmap_check_rmap, &sbcri);
|
|
if (error == XFS_BTREE_QUERY_RANGE_ABORT)
|
|
error = 0;
|
|
|
|
xfs_btree_del_cursor(cur, error);
|
|
out_agf:
|
|
xfs_trans_brelse(sc->tp, agf);
|
|
return error;
|
|
}
|
|
|
|
/* Make sure each rmap has a corresponding bmbt entry. */
|
|
STATIC int
|
|
xchk_bmap_check_rmaps(
|
|
struct xfs_scrub *sc,
|
|
int whichfork)
|
|
{
|
|
loff_t size;
|
|
xfs_agnumber_t agno;
|
|
int error;
|
|
|
|
if (!xfs_sb_version_hasrmapbt(&sc->mp->m_sb) ||
|
|
whichfork == XFS_COW_FORK ||
|
|
(sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT))
|
|
return 0;
|
|
|
|
/* Don't support realtime rmap checks yet. */
|
|
if (XFS_IS_REALTIME_INODE(sc->ip) && whichfork == XFS_DATA_FORK)
|
|
return 0;
|
|
|
|
/*
|
|
* Only do this for complex maps that are in btree format, or for
|
|
* situations where we would seem to have a size but zero extents.
|
|
* The inode repair code can zap broken iforks, which means we have
|
|
* to flag this bmap as corrupt if there are rmaps that need to be
|
|
* reattached.
|
|
*/
|
|
switch (whichfork) {
|
|
case XFS_DATA_FORK:
|
|
size = i_size_read(VFS_I(sc->ip));
|
|
break;
|
|
case XFS_ATTR_FORK:
|
|
size = XFS_IFORK_Q(sc->ip);
|
|
break;
|
|
default:
|
|
size = 0;
|
|
break;
|
|
}
|
|
if (XFS_IFORK_FORMAT(sc->ip, whichfork) != XFS_DINODE_FMT_BTREE &&
|
|
(size == 0 || XFS_IFORK_NEXTENTS(sc->ip, whichfork) > 0))
|
|
return 0;
|
|
|
|
for (agno = 0; agno < sc->mp->m_sb.sb_agcount; agno++) {
|
|
error = xchk_bmap_check_ag_rmaps(sc, whichfork, agno);
|
|
if (error)
|
|
return error;
|
|
if (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Scrub an inode fork's block mappings.
|
|
*
|
|
* First we scan every record in every btree block, if applicable.
|
|
* Then we unconditionally scan the incore extent cache.
|
|
*/
|
|
STATIC int
|
|
xchk_bmap(
|
|
struct xfs_scrub *sc,
|
|
int whichfork)
|
|
{
|
|
struct xfs_bmbt_irec irec;
|
|
struct xchk_bmap_info info = { NULL };
|
|
struct xfs_mount *mp = sc->mp;
|
|
struct xfs_inode *ip = sc->ip;
|
|
struct xfs_ifork *ifp;
|
|
xfs_fileoff_t endoff;
|
|
struct xfs_iext_cursor icur;
|
|
int error = 0;
|
|
|
|
ifp = XFS_IFORK_PTR(ip, whichfork);
|
|
|
|
info.is_rt = whichfork == XFS_DATA_FORK && XFS_IS_REALTIME_INODE(ip);
|
|
info.whichfork = whichfork;
|
|
info.is_shared = whichfork == XFS_DATA_FORK && xfs_is_reflink_inode(ip);
|
|
info.sc = sc;
|
|
|
|
switch (whichfork) {
|
|
case XFS_COW_FORK:
|
|
/* Non-existent CoW forks are ignorable. */
|
|
if (!ifp)
|
|
goto out;
|
|
/* No CoW forks on non-reflink inodes/filesystems. */
|
|
if (!xfs_is_reflink_inode(ip)) {
|
|
xchk_ino_set_corrupt(sc, sc->ip->i_ino);
|
|
goto out;
|
|
}
|
|
break;
|
|
case XFS_ATTR_FORK:
|
|
if (!ifp)
|
|
goto out_check_rmap;
|
|
if (!xfs_sb_version_hasattr(&mp->m_sb) &&
|
|
!xfs_sb_version_hasattr2(&mp->m_sb))
|
|
xchk_ino_set_corrupt(sc, sc->ip->i_ino);
|
|
break;
|
|
default:
|
|
ASSERT(whichfork == XFS_DATA_FORK);
|
|
break;
|
|
}
|
|
|
|
/* Check the fork values */
|
|
switch (XFS_IFORK_FORMAT(ip, whichfork)) {
|
|
case XFS_DINODE_FMT_UUID:
|
|
case XFS_DINODE_FMT_DEV:
|
|
case XFS_DINODE_FMT_LOCAL:
|
|
/* No mappings to check. */
|
|
goto out;
|
|
case XFS_DINODE_FMT_EXTENTS:
|
|
if (!(ifp->if_flags & XFS_IFEXTENTS)) {
|
|
xchk_fblock_set_corrupt(sc, whichfork, 0);
|
|
goto out;
|
|
}
|
|
break;
|
|
case XFS_DINODE_FMT_BTREE:
|
|
if (whichfork == XFS_COW_FORK) {
|
|
xchk_fblock_set_corrupt(sc, whichfork, 0);
|
|
goto out;
|
|
}
|
|
|
|
error = xchk_bmap_btree(sc, whichfork, &info);
|
|
if (error)
|
|
goto out;
|
|
break;
|
|
default:
|
|
xchk_fblock_set_corrupt(sc, whichfork, 0);
|
|
goto out;
|
|
}
|
|
|
|
if (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
|
|
goto out;
|
|
|
|
/* Now try to scrub the in-memory extent list. */
|
|
if (!(ifp->if_flags & XFS_IFEXTENTS)) {
|
|
error = xfs_iread_extents(sc->tp, ip, whichfork);
|
|
if (!xchk_fblock_process_error(sc, whichfork, 0, &error))
|
|
goto out;
|
|
}
|
|
|
|
/* Find the offset of the last extent in the mapping. */
|
|
error = xfs_bmap_last_offset(ip, &endoff, whichfork);
|
|
if (!xchk_fblock_process_error(sc, whichfork, 0, &error))
|
|
goto out;
|
|
|
|
/* Scrub extent records. */
|
|
info.lastoff = 0;
|
|
ifp = XFS_IFORK_PTR(ip, whichfork);
|
|
for_each_xfs_iext(ifp, &icur, &irec) {
|
|
if (xchk_should_terminate(sc, &error) ||
|
|
(sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT))
|
|
break;
|
|
if (isnullstartblock(irec.br_startblock))
|
|
continue;
|
|
if (irec.br_startoff >= endoff) {
|
|
xchk_fblock_set_corrupt(sc, whichfork,
|
|
irec.br_startoff);
|
|
goto out;
|
|
}
|
|
error = xchk_bmap_extent(ip, NULL, &info, &irec);
|
|
if (error)
|
|
goto out;
|
|
}
|
|
|
|
out_check_rmap:
|
|
error = xchk_bmap_check_rmaps(sc, whichfork);
|
|
if (!xchk_fblock_xref_process_error(sc, whichfork, 0, &error))
|
|
goto out;
|
|
out:
|
|
return error;
|
|
}
|
|
|
|
/* Scrub an inode's data fork. */
|
|
int
|
|
xchk_bmap_data(
|
|
struct xfs_scrub *sc)
|
|
{
|
|
return xchk_bmap(sc, XFS_DATA_FORK);
|
|
}
|
|
|
|
/* Scrub an inode's attr fork. */
|
|
int
|
|
xchk_bmap_attr(
|
|
struct xfs_scrub *sc)
|
|
{
|
|
return xchk_bmap(sc, XFS_ATTR_FORK);
|
|
}
|
|
|
|
/* Scrub an inode's CoW fork. */
|
|
int
|
|
xchk_bmap_cow(
|
|
struct xfs_scrub *sc)
|
|
{
|
|
if (!xfs_is_reflink_inode(sc->ip))
|
|
return -ENOENT;
|
|
|
|
return xchk_bmap(sc, XFS_COW_FORK);
|
|
}
|