summaryrefslogtreecommitdiff
path: root/fs/xfs/scrub/btree.c
diff options
context:
space:
mode:
authorDarrick J. Wong <darrick.wong@oracle.com>2017-10-18 07:37:37 +0300
committerDarrick J. Wong <darrick.wong@oracle.com>2017-10-27 01:38:24 +0300
commit537964bceb9a4c9e39a16a83042b80986d373453 (patch)
treefe0cd0e6c1db0d9854f6bf56118a95b36117d238 /fs/xfs/scrub/btree.c
parent4700d22980d459f6c20012a6cb9767a314ab1065 (diff)
downloadlinux-537964bceb9a4c9e39a16a83042b80986d373453.tar.xz
xfs: create helpers to scrub a metadata btree
Create helper functions and tracepoints to deal with errors while scrubbing a metadata btree. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Dave Chinner <dchinner@redhat.com>
Diffstat (limited to 'fs/xfs/scrub/btree.c')
-rw-r--r--fs/xfs/scrub/btree.c114
1 files changed, 114 insertions, 0 deletions
diff --git a/fs/xfs/scrub/btree.c b/fs/xfs/scrub/btree.c
new file mode 100644
index 000000000000..28539081f604
--- /dev/null
+++ b/fs/xfs/scrub/btree.c
@@ -0,0 +1,114 @@
+/*
+ * 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_inode.h"
+#include "xfs_alloc.h"
+#include "scrub/scrub.h"
+#include "scrub/common.h"
+#include "scrub/btree.h"
+#include "scrub/trace.h"
+
+/* btree scrubbing */
+
+/*
+ * Check for btree operation errors. See the section about handling
+ * operational errors in common.c.
+ */
+bool
+xfs_scrub_btree_process_error(
+ struct xfs_scrub_context *sc,
+ struct xfs_btree_cur *cur,
+ int level,
+ int *error)
+{
+ if (*error == 0)
+ return true;
+
+ switch (*error) {
+ case -EDEADLOCK:
+ /* Used to restart an op with deadlock avoidance. */
+ trace_xfs_scrub_deadlock_retry(sc->ip, sc->sm, *error);
+ break;
+ case -EFSBADCRC:
+ case -EFSCORRUPTED:
+ /* Note the badness but don't abort. */
+ sc->sm->sm_flags |= XFS_SCRUB_OFLAG_CORRUPT;
+ *error = 0;
+ /* fall through */
+ default:
+ if (cur->bc_flags & XFS_BTREE_ROOT_IN_INODE)
+ trace_xfs_scrub_ifork_btree_op_error(sc, cur, level,
+ *error, __return_address);
+ else
+ trace_xfs_scrub_btree_op_error(sc, cur, level,
+ *error, __return_address);
+ break;
+ }
+ return false;
+}
+
+/* Record btree block corruption. */
+void
+xfs_scrub_btree_set_corrupt(
+ struct xfs_scrub_context *sc,
+ struct xfs_btree_cur *cur,
+ int level)
+{
+ sc->sm->sm_flags |= XFS_SCRUB_OFLAG_CORRUPT;
+
+ if (cur->bc_flags & XFS_BTREE_ROOT_IN_INODE)
+ trace_xfs_scrub_ifork_btree_error(sc, cur, level,
+ __return_address);
+ else
+ trace_xfs_scrub_btree_error(sc, cur, level,
+ __return_address);
+}
+
+/*
+ * Visit all nodes and leaves of a btree. Check that all pointers and
+ * records are in order, that the keys reflect the records, and use a callback
+ * so that the caller can verify individual records. The callback is the same
+ * as the one for xfs_btree_query_range, so therefore this function also
+ * returns XFS_BTREE_QUERY_RANGE_ABORT, zero, or a negative error code.
+ */
+int
+xfs_scrub_btree(
+ struct xfs_scrub_context *sc,
+ struct xfs_btree_cur *cur,
+ xfs_scrub_btree_rec_fn scrub_fn,
+ struct xfs_owner_info *oinfo,
+ void *private)
+{
+ int error = -EOPNOTSUPP;
+
+ xfs_scrub_btree_process_error(sc, cur, 0, &error);
+ return error;
+}