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, 210 insertions, 0 deletions

diff --git a/tools/bpf/bpftool/token.c b/tools/bpf/bpftool/token.c
new file mode 100644
index 000000000..c08f34b9d
--- /dev/null
+++ b/tools/bpf/bpftool/token.c
@@ -0,0 +1,210 @@
+// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+/* Copyright (C) 2025 Didi Technology Co., Tao Chen */
+
+#ifndef _GNU_SOURCE
+#define _GNU_SOURCE
+#endif
+#include <errno.h>
+#include <fcntl.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <mntent.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#include "json_writer.h"
+#include "main.h"
+
+#define MOUNTS_FILE "/proc/mounts"
+
+static struct {
+	const char *header;
+	const char *key;
+} sets[] = {
+	{"allowed_cmds", "delegate_cmds"},
+	{"allowed_maps", "delegate_maps"},
+	{"allowed_progs", "delegate_progs"},
+	{"allowed_attachs", "delegate_attachs"},
+};
+
+static bool has_delegate_options(const char *mnt_ops)
+{
+	return strstr(mnt_ops, "delegate_cmds") ||
+	       strstr(mnt_ops, "delegate_maps") ||
+	       strstr(mnt_ops, "delegate_progs") ||
+	       strstr(mnt_ops, "delegate_attachs");
+}
+
+static char *get_delegate_value(char *opts, const char *key)
+{
+	char *token, *rest, *ret = NULL;
+
+	if (!opts)
+		return NULL;
+
+	for (token = strtok_r(opts, ",", &rest); token;
+			token = strtok_r(NULL, ",", &rest)) {
+		if (strncmp(token, key, strlen(key)) == 0 &&
+		    token[strlen(key)] == '=') {
+			ret = token + strlen(key) + 1;
+			break;
+		}
+	}
+
+	return ret;
+}
+
+static void print_items_per_line(char *input, int items_per_line)
+{
+	char *str, *rest;
+	int cnt = 0;
+
+	if (!input)
+		return;
+
+	for (str = strtok_r(input, ":", &rest); str;
+			str = strtok_r(NULL, ":", &rest)) {
+		if (cnt % items_per_line == 0)
+			printf("\n\t  ");
+
+		printf("%-20s", str);
+		cnt++;
+	}
+}
+
+#define ITEMS_PER_LINE 4
+static void show_token_info_plain(struct mntent *mntent)
+{
+	size_t i;
+
+	printf("token_info  %s", mntent->mnt_dir);
+
+	for (i = 0; i < ARRAY_SIZE(sets); i++) {
+		char *opts, *value;
+
+		printf("\n\t%s:", sets[i].header);
+		opts = strdup(mntent->mnt_opts);
+		value = get_delegate_value(opts, sets[i].key);
+		print_items_per_line(value, ITEMS_PER_LINE);
+		free(opts);
+	}
+
+	printf("\n");
+}
+
+static void split_json_array_str(char *input)
+{
+	char *str, *rest;
+
+	if (!input) {
+		jsonw_start_array(json_wtr);
+		jsonw_end_array(json_wtr);
+		return;
+	}
+
+	jsonw_start_array(json_wtr);
+	for (str = strtok_r(input, ":", &rest); str;
+			str = strtok_r(NULL, ":", &rest)) {
+		jsonw_string(json_wtr, str);
+	}
+	jsonw_end_array(json_wtr);
+}
+
+static void show_token_info_json(struct mntent *mntent)
+{
+	size_t i;
+
+	jsonw_start_object(json_wtr);
+	jsonw_string_field(json_wtr, "token_info", mntent->mnt_dir);
+
+	for (i = 0; i < ARRAY_SIZE(sets); i++) {
+		char *opts, *value;
+
+		jsonw_name(json_wtr, sets[i].header);
+		opts = strdup(mntent->mnt_opts);
+		value = get_delegate_value(opts, sets[i].key);
+		split_json_array_str(value);
+		free(opts);
+	}
+
+	jsonw_end_object(json_wtr);
+}
+
+static int __show_token_info(struct mntent *mntent)
+{
+	if (json_output)
+		show_token_info_json(mntent);
+	else
+		show_token_info_plain(mntent);
+
+	return 0;
+}
+
+static int show_token_info(void)
+{
+	FILE *fp;
+	struct mntent *ent;
+
+	fp = setmntent(MOUNTS_FILE, "r");
+	if (!fp) {
+		p_err("Failed to open: %s", MOUNTS_FILE);
+		return -1;
+	}
+
+	if (json_output)
+		jsonw_start_array(json_wtr);
+
+	while ((ent = getmntent(fp)) != NULL) {
+		if (strncmp(ent->mnt_type, "bpf", 3) == 0) {
+			if (has_delegate_options(ent->mnt_opts))
+				__show_token_info(ent);
+		}
+	}
+
+	if (json_output)
+		jsonw_end_array(json_wtr);
+
+	endmntent(fp);
+
+	return 0;
+}
+
+static int do_show(int argc, char **argv)
+{
+	if (argc)
+		return BAD_ARG();
+
+	return show_token_info();
+}
+
+static int do_help(int argc, char **argv)
+{
+	if (json_output) {
+		jsonw_null(json_wtr);
+		return 0;
+	}
+
+	fprintf(stderr,
+		"Usage: %1$s %2$s { show | list }\n"
+		"       %1$s %2$s help\n"
+		"       " HELP_SPEC_OPTIONS " }\n"
+		"\n"
+		"",
+		bin_name, argv[-2]);
+	return 0;
+}
+
+static const struct cmd cmds[] = {
+	{ "show",	do_show },
+	{ "list",	do_show },
+	{ "help",	do_help },
+	{ 0 }
+};
+
+int do_token(int argc, char **argv)
+{
+	return cmd_select(cmds, argc, argv, do_help);
+}