From d852657ccfc0e45570989a5f142e11c950d9a793 Mon Sep 17 00:00:00 2001 From: "Darrick J. Wong" Date: Tue, 16 Jan 2018 18:53:08 -0800 Subject: xfs: cross-reference reverse-mapping btree When scrubbing various btrees, we should cross-reference the records with the reverse mapping btree and ensure that traversing the btree finds the same number of blocks that the rmapbt thinks are owned by that btree. Signed-off-by: Darrick J. Wong Reviewed-by: Dave Chinner --- fs/xfs/scrub/rmap.c | 65 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 65 insertions(+) (limited to 'fs/xfs/scrub/rmap.c') diff --git a/fs/xfs/scrub/rmap.c b/fs/xfs/scrub/rmap.c index 6e937ef14218..3ee50610c48a 100644 --- a/fs/xfs/scrub/rmap.c +++ b/fs/xfs/scrub/rmap.c @@ -157,3 +157,68 @@ xfs_scrub_rmapbt( return xfs_scrub_btree(sc, sc->sa.rmap_cur, xfs_scrub_rmapbt_rec, &oinfo, NULL); } + +/* xref check that the extent is owned by a given owner */ +static inline void +xfs_scrub_xref_check_owner( + struct xfs_scrub_context *sc, + xfs_agblock_t bno, + xfs_extlen_t len, + struct xfs_owner_info *oinfo, + bool should_have_rmap) +{ + bool has_rmap; + int error; + + if (!sc->sa.rmap_cur) + return; + + error = xfs_rmap_record_exists(sc->sa.rmap_cur, bno, len, oinfo, + &has_rmap); + if (!xfs_scrub_should_check_xref(sc, &error, &sc->sa.rmap_cur)) + return; + if (has_rmap != should_have_rmap) + xfs_scrub_btree_xref_set_corrupt(sc, sc->sa.rmap_cur, 0); +} + +/* xref check that the extent is owned by a given owner */ +void +xfs_scrub_xref_is_owned_by( + struct xfs_scrub_context *sc, + xfs_agblock_t bno, + xfs_extlen_t len, + struct xfs_owner_info *oinfo) +{ + xfs_scrub_xref_check_owner(sc, bno, len, oinfo, true); +} + +/* xref check that the extent is not owned by a given owner */ +void +xfs_scrub_xref_is_not_owned_by( + struct xfs_scrub_context *sc, + xfs_agblock_t bno, + xfs_extlen_t len, + struct xfs_owner_info *oinfo) +{ + xfs_scrub_xref_check_owner(sc, bno, len, oinfo, false); +} + +/* xref check that the extent has no reverse mapping at all */ +void +xfs_scrub_xref_has_no_owner( + struct xfs_scrub_context *sc, + xfs_agblock_t bno, + xfs_extlen_t len) +{ + bool has_rmap; + int error; + + if (!sc->sa.rmap_cur) + return; + + error = xfs_rmap_has_record(sc->sa.rmap_cur, bno, len, &has_rmap); + if (!xfs_scrub_should_check_xref(sc, &error, &sc->sa.rmap_cur)) + return; + if (has_rmap) + xfs_scrub_btree_xref_set_corrupt(sc, sc->sa.rmap_cur, 0); +} -- cgit v1.2.3