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, 73 insertions, 0 deletions

diff --git a/fs/smb/server/stats.h b/fs/smb/server/stats.h
new file mode 100644
index 000000000..b60c30c69
--- /dev/null
+++ b/fs/smb/server/stats.h
@@ -0,0 +1,73 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ *   Copyright (C) 2025, LG Electronics.
+ *   Author(s): Hyunchul Lee <hyc.lee@gmail.com>
+ *   Copyright (C) 2025, Samsung Electronics.
+ *   Author(s): Vedansh Bhardwaj <v.bhardwaj@samsung.com>
+ */
+
+#ifndef __KSMBD_STATS_H__
+#define __KSMBD_STATS_H__
+
+#define KSMBD_COUNTER_MAX_REQS	19
+
+enum {
+	KSMBD_COUNTER_SESSIONS = 0,
+	KSMBD_COUNTER_TREE_CONNS,
+	KSMBD_COUNTER_REQUESTS,
+	KSMBD_COUNTER_READ_BYTES,
+	KSMBD_COUNTER_WRITE_BYTES,
+	KSMBD_COUNTER_FIRST_REQ,
+	KSMBD_COUNTER_LAST_REQ = KSMBD_COUNTER_FIRST_REQ +
+				KSMBD_COUNTER_MAX_REQS - 1,
+	KSMBD_COUNTER_MAX,
+};
+
+#ifdef CONFIG_PROC_FS
+extern struct ksmbd_counters ksmbd_counters;
+
+struct ksmbd_counters {
+	struct percpu_counter	counters[KSMBD_COUNTER_MAX];
+};
+
+static inline void ksmbd_counter_inc(int type)
+{
+	percpu_counter_inc(&ksmbd_counters.counters[type]);
+}
+
+static inline void ksmbd_counter_dec(int type)
+{
+	percpu_counter_dec(&ksmbd_counters.counters[type]);
+}
+
+static inline void ksmbd_counter_add(int type, s64 value)
+{
+	percpu_counter_add(&ksmbd_counters.counters[type], value);
+}
+
+static inline void ksmbd_counter_sub(int type, s64 value)
+{
+	percpu_counter_sub(&ksmbd_counters.counters[type], value);
+}
+
+static inline void ksmbd_counter_inc_reqs(unsigned int cmd)
+{
+	if (cmd < KSMBD_COUNTER_MAX_REQS)
+		percpu_counter_inc(&ksmbd_counters.counters[KSMBD_COUNTER_FIRST_REQ + cmd]);
+}
+
+static inline s64 ksmbd_counter_sum(int type)
+{
+	return percpu_counter_sum_positive(&ksmbd_counters.counters[type]);
+}
+#else
+
+static inline void ksmbd_counter_inc(int type) {}
+static inline void ksmbd_counter_dec(int type) {}
+static inline void ksmbd_counter_add(int type, s64 value) {}
+static inline void ksmbd_counter_sub(int type, s64 value) {}
+static inline void ksmbd_counter_inc_reqs(unsigned int cmd) {}
+static inline s64 ksmbd_counter_sum(int type) { return 0; }
+#endif
+
+#endif