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xfs: split xchk_bmap_xref_rmap into two functions
There's more special-cased functionality than not in this function. Split it into two so that each can be far more cohesive. Signed-off-by: Darrick J. Wong <djwong@kernel.org> Reviewed-by: Dave Chinner <dchinner@redhat.com>
This commit is contained in:
Darrick J. Wong
parent
634d4a79e7
commit
c0d5a92f7a
1 changed files with 76 additions and 40 deletions
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@ -165,7 +165,7 @@ xchk_bmap_get_rmap(
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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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/* Make sure that we have rmapbt records for this data/attr fork 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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@ -174,41 +174,39 @@ xchk_bmap_xref_rmap(
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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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uint64_t owner = info->sc->ip->i_ino;
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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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/*
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* The rmap must be an exact match for this incore file mapping record,
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* which may have arisen from multiple ondisk records.
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*/
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if (rmap.rm_startblock != agbno)
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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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rmap_end = (unsigned long long)rmap.rm_startblock + rmap.rm_blockcount;
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if (rmap_end != agbno + irec->br_blockcount)
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xchk_fblock_xref_set_corrupt(info->sc, info->whichfork,
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irec->br_startoff);
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/* Check the logical offsets. */
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if (rmap.rm_offset != irec->br_startoff)
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xchk_fblock_xref_set_corrupt(info->sc, info->whichfork,
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irec->br_startoff);
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rmap_end = (unsigned long long)rmap.rm_offset + rmap.rm_blockcount;
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if (rmap_end != irec->br_startoff + irec->br_blockcount)
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xchk_fblock_xref_set_corrupt(info->sc, info->whichfork,
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irec->br_startoff);
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/* Check the owner */
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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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@ -220,8 +218,7 @@ xchk_bmap_xref_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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if (!!(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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@ -233,23 +230,60 @@ xchk_bmap_xref_rmap(
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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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/* Make sure that we have rmapbt records for this COW fork extent. */
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STATIC void
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xchk_bmap_xref_rmap_cow(
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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 = XFS_RMAP_OWN_COW;
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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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/* 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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/*
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* The rmap must correspond exactly with this bmbt record. Skip this
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* for CoW fork extents because the refcount btree (and not the inode)
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* is the ondisk owner for those extents.
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* CoW staging extents are owned by the refcount btree, so the rmap
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* can start before and end after the physical space allocated to this
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* mapping. There are no offsets to check.
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*/
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if (info->whichfork != XFS_COW_FORK) {
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if (rmap.rm_startblock != agbno)
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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_startblock > agbno)
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xchk_fblock_xref_set_corrupt(info->sc, info->whichfork,
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irec->br_startoff);
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rmap_end = (unsigned long long)rmap.rm_startblock +
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rmap.rm_blockcount;
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if (rmap_end != agbno + irec->br_blockcount)
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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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rmap_end = (unsigned long long)rmap.rm_startblock + rmap.rm_blockcount;
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if (rmap_end < agbno + irec->br_blockcount)
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xchk_fblock_xref_set_corrupt(info->sc, info->whichfork,
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irec->br_startoff);
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/* Check the owner */
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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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* No flags allowed. Note that the (in-memory) CoW fork distinguishes
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* between unwritten and written extents, but we don't track that in
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* the rmap records because the blocks are owned (on-disk) by the
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* refcountbt, which doesn't track unwritten state.
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*/
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if (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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if (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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}
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/* Cross-reference a single rtdev extent record. */
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@ -288,9 +322,9 @@ xchk_bmap_iextent_xref(
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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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xchk_bmap_xref_rmap(info, irec, agbno);
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if (!xfs_is_reflink_inode(info->sc->ip)) {
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xfs_rmap_ino_owner(&oinfo, info->sc->ip->i_ino,
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info->whichfork, irec->br_startoff);
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@ -303,6 +337,7 @@ xchk_bmap_iextent_xref(
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irec->br_blockcount);
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break;
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case XFS_ATTR_FORK:
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xchk_bmap_xref_rmap(info, irec, agbno);
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xfs_rmap_ino_owner(&oinfo, info->sc->ip->i_ino,
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info->whichfork, irec->br_startoff);
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xchk_xref_is_only_owned_by(info->sc, agbno, irec->br_blockcount,
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@ -313,6 +348,7 @@ xchk_bmap_iextent_xref(
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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_bmap_xref_rmap_cow(info, irec, agbno);
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xchk_xref_is_only_owned_by(info->sc, agbno, irec->br_blockcount,
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&XFS_RMAP_OINFO_COW);
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xchk_xref_is_cow_staging(info->sc, agbno,
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