scftorture: Count single_rpc offline failures in statistics outputgrafted

scf_torture_stats_print() aggregates each invoker thread's counters
into a local scf_statistics structure before printing, but the
n_single_rpc_ofl field is missing from the aggregation loop.  As a
result, the "single_rpc_ofl" value printed in the statistics line is
always zero, even when smp_call_function_single() invocations for the
RPC test have failed due to offline CPUs and been counted by the
invoker threads.

Add the missing accumulation so that the printed value reflects the
actual counts.

Signed-off-by: Joel Fernandes <joelagnelf@nvidia.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>

1 files changed, 62 insertions, 0 deletions

diff --git a/fs/udf/lowlevel.c b/fs/udf/lowlevel.c
new file mode 100644
index 000000000..9d847a7a0
--- /dev/null
+++ b/fs/udf/lowlevel.c
@@ -0,0 +1,62 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * lowlevel.c
+ *
+ * PURPOSE
+ *  Low Level Device Routines for the UDF filesystem
+ *
+ * COPYRIGHT
+ *  (C) 1999-2001 Ben Fennema
+ *
+ * HISTORY
+ *
+ *  03/26/99 blf  Created.
+ */
+
+#include "udfdecl.h"
+
+#include <linux/blkdev.h>
+#include <linux/cdrom.h>
+#include <linux/uaccess.h>
+
+#include "udf_sb.h"
+
+unsigned int udf_get_last_session(struct super_block *sb)
+{
+	struct cdrom_device_info *cdi = disk_to_cdi(sb->s_bdev->bd_disk);
+	struct cdrom_multisession ms_info;
+
+	if (!cdi) {
+		udf_debug("CDROMMULTISESSION not supported.\n");
+		return 0;
+	}
+
+	ms_info.addr_format = CDROM_LBA;
+	if (cdrom_multisession(cdi, &ms_info) == 0) {
+		udf_debug("XA disk: %s, vol_desc_start=%d\n",
+			  ms_info.xa_flag ? "yes" : "no", ms_info.addr.lba);
+		if (ms_info.xa_flag) /* necessary for a valid ms_info.addr */
+			return ms_info.addr.lba;
+	}
+	return 0;
+}
+
+udf_pblk_t udf_get_last_block(struct super_block *sb)
+{
+	struct cdrom_device_info *cdi = disk_to_cdi(sb->s_bdev->bd_disk);
+	unsigned long lblock = 0;
+
+	/*
+	 * The cdrom layer call failed or returned obviously bogus value?
+	 * Try using the device size...
+	 */
+	if (!cdi || cdrom_get_last_written(cdi, &lblock) || lblock == 0) {
+		if (sb_bdev_nr_blocks(sb) > ~(udf_pblk_t)0)
+			return 0;
+		lblock = sb_bdev_nr_blocks(sb);
+	}
+
+	if (lblock)
+		return lblock - 1;
+	return 0;
+}