xfs: support inode btree blockcounts in online scrub

Add the necessary bits to the online scrub code to check the inode btree
counters when enabled.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>

diff --git a/fs/xfs/scrub/agheader.c b/fs/xfs/scrub/agheader.c
index e9bcf1f..ae8e2e0 100644 (file)
--- a/fs/xfs/scrub/agheader.c
+++ b/fs/xfs/scrub/agheader.c
@@ -781,6 +781,35 @@ xchk_agi_xref_icounts(
                xchk_block_xref_set_corrupt(sc, sc->sa.agi_bp);
 }
 
+/* Check agi_[fi]blocks against tree size */
+static inline void
+xchk_agi_xref_fiblocks(
+       struct xfs_scrub        *sc)
+{
+       struct xfs_agi          *agi = sc->sa.agi_bp->b_addr;
+       xfs_agblock_t           blocks;
+       int                     error = 0;
+
+       if (!xfs_sb_version_hasinobtcounts(&sc->mp->m_sb))
+               return;
+
+       if (sc->sa.ino_cur) {
+               error = xfs_btree_count_blocks(sc->sa.ino_cur, &blocks);
+               if (!xchk_should_check_xref(sc, &error, &sc->sa.ino_cur))
+                       return;
+               if (blocks != be32_to_cpu(agi->agi_iblocks))
+                       xchk_block_xref_set_corrupt(sc, sc->sa.agi_bp);
+       }
+
+       if (sc->sa.fino_cur) {
+               error = xfs_btree_count_blocks(sc->sa.fino_cur, &blocks);
+               if (!xchk_should_check_xref(sc, &error, &sc->sa.fino_cur))
+                       return;
+               if (blocks != be32_to_cpu(agi->agi_fblocks))
+                       xchk_block_xref_set_corrupt(sc, sc->sa.agi_bp);
+       }
+}
+
 /* Cross-reference with the other btrees. */
 STATIC void
 xchk_agi_xref(
@@ -804,6 +833,7 @@ xchk_agi_xref(
        xchk_agi_xref_icounts(sc);
        xchk_xref_is_owned_by(sc, agbno, 1, &XFS_RMAP_OINFO_FS);
        xchk_xref_is_not_shared(sc, agbno, 1);
+       xchk_agi_xref_fiblocks(sc);
 
        /* scrub teardown will take care of sc->sa for us */
 }