[PATCH 19/20] xfs: cross-reference realtime bitmap to realtime rmapbt scrubber

["Darrick J. Wong" <darrick.wong@xxxxxxxxxx>]

When we're checking the realtime rmapbt, cross-reference the entries
with the realtime bitmap too.

Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
---
 fs/xfs/xfs_scrub.c |    8 ++++++++
 1 file changed, 8 insertions(+)


diff --git a/fs/xfs/xfs_scrub.c b/fs/xfs/xfs_scrub.c
index f1f4a2f..f0cd21f 100644
--- a/fs/xfs/xfs_scrub.c
+++ b/fs/xfs/xfs_scrub.c
@@ -2845,10 +2845,12 @@ xfs_scrub_rtrmapbt_helper(
 {
        struct xfs_mount                *mp = bs->cur->bc_mp;
        struct xfs_rmap_irec            irec;
+       bool                            is_free;
        bool                            non_inode;
        bool                            is_bmbt;
        bool                            is_attr;
        int                             error;
+       int                             err2;
 
        error = xfs_rmap_btrec_to_irec(bs->cur, rec, &irec);
        if (error)
@@ -2868,6 +2870,12 @@ xfs_scrub_rtrmapbt_helper(
        XFS_BTREC_SCRUB_CHECK(bs, !non_inode);
        XFS_BTREC_SCRUB_CHECK(bs, !is_attr);
 
+       /* Check the rtbitmap thinks it's free. */
+       err2 = xfs_rtbitmap_extent_is_free(mp, irec.rm_startblock,
+                       irec.rm_blockcount, &is_free);
+       if (!err2)
+               XFS_BTREC_SCRUB_CHECK(bs, !is_free);
+
        return error;
 }