xfs: scrub realtime bitmap/summary
Perform simple tests of the realtime bitmap and summary.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
diff --git a/fs/xfs/scrub/rtbitmap.c b/fs/xfs/scrub/rtbitmap.c
new file mode 100644
index 0000000..c6fedb6
--- /dev/null
+++ b/fs/xfs/scrub/rtbitmap.c
@@ -0,0 +1,108 @@
+/*
+ * Copyright (C) 2017 Oracle. All Rights Reserved.
+ *
+ * Author: Darrick J. Wong <darrick.wong@oracle.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it would be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+#include "xfs.h"
+#include "xfs_fs.h"
+#include "xfs_shared.h"
+#include "xfs_format.h"
+#include "xfs_trans_resv.h"
+#include "xfs_mount.h"
+#include "xfs_defer.h"
+#include "xfs_btree.h"
+#include "xfs_bit.h"
+#include "xfs_log_format.h"
+#include "xfs_trans.h"
+#include "xfs_sb.h"
+#include "xfs_alloc.h"
+#include "xfs_rtalloc.h"
+#include "xfs_inode.h"
+#include "scrub/xfs_scrub.h"
+#include "scrub/scrub.h"
+#include "scrub/common.h"
+#include "scrub/trace.h"
+
+/* Set us up with the realtime metadata locked. */
+int
+xfs_scrub_setup_rt(
+ struct xfs_scrub_context *sc,
+ struct xfs_inode *ip)
+{
+ struct xfs_mount *mp = sc->mp;
+ int error = 0;
+
+ /*
+ * If userspace gave us an AG number or inode data, they don't
+ * know what they're doing. Get out.
+ */
+ if (sc->sm->sm_agno || sc->sm->sm_ino || sc->sm->sm_gen)
+ return -EINVAL;
+
+ error = xfs_scrub_setup_fs(sc, ip);
+ if (error)
+ return error;
+
+ sc->ilock_flags = XFS_ILOCK_EXCL | XFS_ILOCK_RTBITMAP;
+ sc->ip = mp->m_rbmip;
+ xfs_ilock(sc->ip, sc->ilock_flags);
+
+ return 0;
+}
+
+/* Realtime bitmap. */
+
+/* Scrub a free extent record from the realtime bitmap. */
+STATIC int
+xfs_scrub_rtbitmap_rec(
+ struct xfs_trans *tp,
+ struct xfs_rtalloc_rec *rec,
+ void *priv)
+{
+ struct xfs_scrub_context *sc = priv;
+
+ if (rec->ar_startblock + rec->ar_blockcount <= rec->ar_startblock ||
+ !xfs_verify_rtbno(sc->mp, rec->ar_startblock) ||
+ !xfs_verify_rtbno(sc->mp, rec->ar_startblock +
+ rec->ar_blockcount - 1))
+ xfs_scrub_fblock_set_corrupt(sc, XFS_DATA_FORK, 0);
+ return 0;
+}
+
+/* Scrub the realtime bitmap. */
+int
+xfs_scrub_rtbitmap(
+ struct xfs_scrub_context *sc)
+{
+ int error;
+
+ error = xfs_rtalloc_query_all(sc->tp, xfs_scrub_rtbitmap_rec, sc);
+ if (!xfs_scrub_fblock_process_error(sc, XFS_DATA_FORK, 0, &error))
+ goto out;
+
+out:
+ return error;
+}
+
+/* Scrub the realtime summary. */
+int
+xfs_scrub_rtsummary(
+ struct xfs_scrub_context *sc)
+{
+ /* XXX: implement this some day */
+ return -ENOENT;
+}