xfs: move the realtime summary file scrubber to a separate source file

Move the realtime summary file checking code to a separate file in
preparation to actually implement it.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>

1 files changed, 54 insertions, 0 deletions

diff --git a/fs/xfs/scrub/rtsummary.c b/fs/xfs/scrub/rtsummary.c
new file mode 100644
index 000000000000..e12554e7f6f9
--- /dev/null
+++ b/fs/xfs/scrub/rtsummary.c
@@ -0,0 +1,54 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2017-2022 Oracle.  All Rights Reserved.
+ * Author: Darrick J. Wong <djwong@kernel.org>
+ */
+#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_btree.h"
+#include "xfs_inode.h"
+#include "xfs_log_format.h"
+#include "xfs_trans.h"
+#include "xfs_rtalloc.h"
+#include "scrub/scrub.h"
+#include "scrub/common.h"
+
+/* Scrub the realtime summary. */
+int
+xchk_rtsummary(
+	struct xfs_scrub	*sc)
+{
+	struct xfs_inode	*rsumip = sc->mp->m_rsumip;
+	struct xfs_inode	*old_ip = sc->ip;
+	uint			old_ilock_flags = sc->ilock_flags;
+	int			error = 0;
+
+	/*
+	 * We ILOCK'd the rt bitmap ip in the setup routine, now lock the
+	 * rt summary ip in compliance with the rt inode locking rules.
+	 *
+	 * Since we switch sc->ip to rsumip we have to save the old ilock
+	 * flags so that we don't mix up the inode state that @sc tracks.
+	 */
+	sc->ip = rsumip;
+	sc->ilock_flags = 0;
+	xchk_ilock(sc, XFS_ILOCK_EXCL | XFS_ILOCK_RTSUM);
+
+	/* Invoke the fork scrubber. */
+	error = xchk_metadata_inode_forks(sc);
+	if (error || (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT))
+		goto out;
+
+	/* XXX: implement this some day */
+	xchk_set_incomplete(sc);
+out:
+	/* Switch back to the rtbitmap inode and lock flags. */
+	xchk_iunlock(sc, XFS_ILOCK_EXCL | XFS_ILOCK_RTSUM);
+	sc->ilock_flags = old_ilock_flags;
+	sc->ip = old_ip;
+	return error;
+}