From 971ee3a6706abf1074349c124922e4e4d513fa45 Mon Sep 17 00:00:00 2001 From: "Darrick J. Wong" Date: Tue, 11 Apr 2023 19:00:23 -0700 Subject: [PATCH] xfs: change bmap scrubber to store the previous mapping Convert the inode data/attr/cow fork scrubber to remember the entire previous mapping, not just the next expected offset. No behavior changes here, but this will enable some better checking in subsequent patches. Signed-off-by: Darrick J. Wong Reviewed-by: Dave Chinner --- fs/xfs/scrub/bmap.c | 23 ++++++++++++++++++----- 1 file changed, 18 insertions(+), 5 deletions(-) diff --git a/fs/xfs/scrub/bmap.c b/fs/xfs/scrub/bmap.c index e485a546a758..7b4d0e2736a2 100644 --- a/fs/xfs/scrub/bmap.c +++ b/fs/xfs/scrub/bmap.c @@ -96,11 +96,23 @@ out: struct xchk_bmap_info { struct xfs_scrub *sc; + + /* Incore extent tree cursor */ struct xfs_iext_cursor icur; - xfs_fileoff_t lastoff; + + /* Previous fork mapping that we examined */ + struct xfs_bmbt_irec prev_rec; + + /* Is this a realtime fork? */ bool is_rt; + + /* May mappings point to shared space? */ bool is_shared; + + /* Was the incore extent tree loaded? */ bool was_loaded; + + /* Which inode fork are we checking? */ int whichfork; }; @@ -405,7 +417,8 @@ xchk_bmap_iextent( * Check for out-of-order extents. This record could have come * from the incore list, for which there is no ordering check. */ - if (irec->br_startoff < info->lastoff) + if (irec->br_startoff < info->prev_rec.br_startoff + + info->prev_rec.br_blockcount) xchk_fblock_set_corrupt(info->sc, info->whichfork, irec->br_startoff); @@ -712,7 +725,8 @@ xchk_bmap_iextent_delalloc( * Check for out-of-order extents. This record could have come * from the incore list, for which there is no ordering check. */ - if (irec->br_startoff < info->lastoff) + if (irec->br_startoff < info->prev_rec.br_startoff + + info->prev_rec.br_blockcount) xchk_fblock_set_corrupt(info->sc, info->whichfork, irec->br_startoff); @@ -806,7 +820,6 @@ xchk_bmap( goto out; /* Scrub extent records. */ - info.lastoff = 0; ifp = xfs_ifork_ptr(ip, whichfork); for_each_xfs_iext(ifp, &info.icur, &irec) { if (xchk_should_terminate(sc, &error) || @@ -823,7 +836,7 @@ xchk_bmap( xchk_bmap_iextent_delalloc(ip, &info, &irec); else xchk_bmap_iextent(ip, &info, &irec); - info.lastoff = irec.br_startoff + irec.br_blockcount; + memcpy(&info.prev_rec, &irec, sizeof(struct xfs_bmbt_irec)); } error = xchk_bmap_check_rmaps(sc, whichfork);