From 46d9bfb5e706493777b9dfed666cd8967f69e6fd Mon Sep 17 00:00:00 2001
From: "Darrick J. Wong" <darrick.wong@oracle.com>
Date: Tue, 16 Jan 2018 18:53:10 -0800
Subject: xfs: cross-reference the realtime bitmap

While we're scrubbing various btrees, cross-reference the records
with the other metadata.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
---
 fs/xfs/scrub/bmap.c     |  3 +++
 fs/xfs/scrub/rtbitmap.c | 23 +++++++++++++++++++++++
 fs/xfs/scrub/scrub.h    |  6 ++++++
 3 files changed, 32 insertions(+)

(limited to 'fs/xfs/scrub')

diff --git a/fs/xfs/scrub/bmap.c b/fs/xfs/scrub/bmap.c
index 7b2cf8fd1ce0..2bb3e0c4b4ef 100644
--- a/fs/xfs/scrub/bmap.c
+++ b/fs/xfs/scrub/bmap.c
@@ -243,6 +243,9 @@ xfs_scrub_bmap_rt_extent_xref(
 {
 	if (info->sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
 		return;
+
+	xfs_scrub_xref_is_used_rt_space(info->sc, irec->br_startblock,
+			irec->br_blockcount);
 }
 
 /* Cross-reference a single datadev extent record. */
diff --git a/fs/xfs/scrub/rtbitmap.c b/fs/xfs/scrub/rtbitmap.c
index 6860d5d92515..26390991369a 100644
--- a/fs/xfs/scrub/rtbitmap.c
+++ b/fs/xfs/scrub/rtbitmap.c
@@ -98,3 +98,26 @@ xfs_scrub_rtsummary(
 	/* XXX: implement this some day */
 	return -ENOENT;
 }
+
+
+/* xref check that the extent is not free in the rtbitmap */
+void
+xfs_scrub_xref_is_used_rt_space(
+	struct xfs_scrub_context	*sc,
+	xfs_rtblock_t			fsbno,
+	xfs_extlen_t			len)
+{
+	bool				is_free;
+	int				error;
+
+	xfs_ilock(sc->mp->m_rbmip, XFS_ILOCK_SHARED | XFS_ILOCK_RTBITMAP);
+	error = xfs_rtalloc_extent_is_free(sc->mp, sc->tp, fsbno, len,
+			&is_free);
+	if (!xfs_scrub_should_check_xref(sc, &error, NULL))
+		goto out_unlock;
+	if (is_free)
+		xfs_scrub_ino_xref_set_corrupt(sc, sc->mp->m_rbmip->i_ino,
+				NULL);
+out_unlock:
+	xfs_iunlock(sc->mp->m_rbmip, XFS_ILOCK_SHARED | XFS_ILOCK_RTBITMAP);
+}
diff --git a/fs/xfs/scrub/scrub.h b/fs/xfs/scrub/scrub.h
index c8f8b42cbdb3..0d92af86f67a 100644
--- a/fs/xfs/scrub/scrub.h
+++ b/fs/xfs/scrub/scrub.h
@@ -142,5 +142,11 @@ void xfs_scrub_xref_is_cow_staging(struct xfs_scrub_context *sc,
 		xfs_agblock_t bno, xfs_extlen_t len);
 void xfs_scrub_xref_is_not_shared(struct xfs_scrub_context *sc,
 		xfs_agblock_t bno, xfs_extlen_t len);
+#ifdef CONFIG_XFS_RT
+void xfs_scrub_xref_is_used_rt_space(struct xfs_scrub_context *sc,
+		xfs_rtblock_t rtbno, xfs_extlen_t len);
+#else
+# define xfs_scrub_xref_is_used_rt_space(sc, rtbno, len) do { } while (0)
+#endif
 
 #endif	/* __XFS_SCRUB_SCRUB_H__ */
-- 
cgit