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>

diff --git a/fs/xfs/libxfs/xfs_rtbitmap.c b/fs/xfs/libxfs/xfs_rtbitmap.c
index 3fb29a5..106be2d 100644 (file)
--- a/fs/xfs/libxfs/xfs_rtbitmap.c
+++ b/fs/xfs/libxfs/xfs_rtbitmap.c
@@ -1097,3 +1097,24 @@ xfs_verify_rtbno(
 {
        return rtbno < mp->m_sb.sb_rblocks;
 }
+
+/* Is the given extent all free? */
+int
+xfs_rtalloc_extent_is_free(
+       struct xfs_mount                *mp,
+       struct xfs_trans                *tp,
+       xfs_rtblock_t                   start,
+       xfs_extlen_t                    len,
+       bool                            *is_free)
+{
+       xfs_rtblock_t                   end;
+       int                             matches;
+       int                             error;
+
+       error = xfs_rtcheck_range(mp, tp, start, len, 1, &end, &matches);
+       if (error)
+               return error;
+
+       *is_free = matches;
+       return 0;
+}

diff --git a/fs/xfs/scrub/bmap.c b/fs/xfs/scrub/bmap.c
index 7b2cf8f..2bb3e0c 100644 (file)
--- 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 6860d5d..2639099 100644 (file)
--- 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 c8f8b42..0d92af8 100644 (file)
--- 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__ */

diff --git a/fs/xfs/xfs_rtalloc.h b/fs/xfs/xfs_rtalloc.h
index 3f30f84..dfee3c9 100644 (file)
--- a/fs/xfs/xfs_rtalloc.h
+++ b/fs/xfs/xfs_rtalloc.h
@@ -139,6 +139,9 @@ int xfs_rtalloc_query_all(struct xfs_trans *tp,
                          xfs_rtalloc_query_range_fn fn,
                          void *priv);
 bool xfs_verify_rtbno(struct xfs_mount *mp, xfs_rtblock_t rtbno);
+int xfs_rtalloc_extent_is_free(struct xfs_mount *mp, struct xfs_trans *tp,
+                              xfs_rtblock_t start, xfs_extlen_t len,
+                              bool *is_free);
 #else
 # define xfs_rtallocate_extent(t,b,min,max,l,f,p,rb)    (ENOSYS)
 # define xfs_rtfree_extent(t,b,l)                       (ENOSYS)
@@ -148,6 +151,7 @@ bool xfs_verify_rtbno(struct xfs_mount *mp, xfs_rtblock_t rtbno);
 # define xfs_rtalloc_query_all(t,f,p)                   (ENOSYS)
 # define xfs_rtbuf_get(m,t,b,i,p)                       (ENOSYS)
 # define xfs_verify_rtbno(m, r)                        (false)
+# define xfs_rtalloc_extent_is_free(m,t,s,l,i)          (ENOSYS)
 static inline int              /* error */
 xfs_rtmount_init(
        xfs_mount_t     *mp)    /* file system mount structure */