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, 182 insertions, 0 deletions

diff --git a/samples/hidraw/hid-example.c b/samples/hidraw/hid-example.c
new file mode 100644
index 000000000..0f73ace3c
--- /dev/null
+++ b/samples/hidraw/hid-example.c
@@ -0,0 +1,182 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Hidraw Userspace Example
+ *
+ * Copyright (c) 2010 Alan Ott <alan@signal11.us>
+ * Copyright (c) 2010 Signal 11 Software
+ *
+ * The code may be used by anyone for any purpose,
+ * and can serve as a starting point for developing
+ * applications using hidraw.
+ */
+
+/* Linux */
+#include <linux/types.h>
+#include <linux/input.h>
+#include <linux/hidraw.h>
+
+/*
+ * Ugly hack to work around failing compilation on systems that don't
+ * yet populate new version of hidraw.h to userspace.
+ */
+#ifndef HIDIOCSFEATURE
+#warning Please have your distro update the userspace kernel headers
+#define HIDIOCSFEATURE(len)    _IOC(_IOC_WRITE|_IOC_READ, 'H', 0x06, len)
+#define HIDIOCGFEATURE(len)    _IOC(_IOC_WRITE|_IOC_READ, 'H', 0x07, len)
+#endif
+
+/* Unix */
+#include <sys/ioctl.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+/* C */
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <errno.h>
+
+const char *bus_str(int bus);
+
+int main(int argc, char **argv)
+{
+	int fd;
+	int i, res, desc_size = 0;
+	char buf[256];
+	struct hidraw_report_descriptor rpt_desc;
+	struct hidraw_devinfo info;
+	char *device = "/dev/hidraw0";
+
+	if (argc > 1)
+		device = argv[1];
+
+	/* Open the Device with non-blocking reads. In real life,
+	   don't use a hard coded path; use libudev instead. */
+	fd = open(device, O_RDWR|O_NONBLOCK);
+
+	if (fd < 0) {
+		perror("Unable to open device");
+		return 1;
+	}
+
+	memset(&rpt_desc, 0x0, sizeof(rpt_desc));
+	memset(&info, 0x0, sizeof(info));
+	memset(buf, 0x0, sizeof(buf));
+
+	/* Get Report Descriptor Size */
+	res = ioctl(fd, HIDIOCGRDESCSIZE, &desc_size);
+	if (res < 0)
+		perror("HIDIOCGRDESCSIZE");
+	else
+		printf("Report Descriptor Size: %d\n", desc_size);
+
+	/* Get Report Descriptor */
+	rpt_desc.size = desc_size;
+	res = ioctl(fd, HIDIOCGRDESC, &rpt_desc);
+	if (res < 0) {
+		perror("HIDIOCGRDESC");
+	} else {
+		printf("Report Descriptor:\n");
+		for (i = 0; i < rpt_desc.size; i++)
+			printf("%hhx ", rpt_desc.value[i]);
+		puts("\n");
+	}
+
+	/* Get Raw Name */
+	res = ioctl(fd, HIDIOCGRAWNAME(256), buf);
+	if (res < 0)
+		perror("HIDIOCGRAWNAME");
+	else
+		printf("Raw Name: %s\n", buf);
+
+	/* Get Physical Location */
+	res = ioctl(fd, HIDIOCGRAWPHYS(256), buf);
+	if (res < 0)
+		perror("HIDIOCGRAWPHYS");
+	else
+		printf("Raw Phys: %s\n", buf);
+
+	/* Get Raw Info */
+	res = ioctl(fd, HIDIOCGRAWINFO, &info);
+	if (res < 0) {
+		perror("HIDIOCGRAWINFO");
+	} else {
+		printf("Raw Info:\n");
+		printf("\tbustype: %d (%s)\n",
+			info.bustype, bus_str(info.bustype));
+		printf("\tvendor: 0x%04hx\n", info.vendor);
+		printf("\tproduct: 0x%04hx\n", info.product);
+	}
+
+	/* Set Feature */
+	buf[0] = 0x9; /* Report Number */
+	buf[1] = 0xff;
+	buf[2] = 0xff;
+	buf[3] = 0xff;
+	res = ioctl(fd, HIDIOCSFEATURE(4), buf);
+	if (res < 0)
+		perror("HIDIOCSFEATURE");
+	else
+		printf("ioctl HIDIOCSFEATURE returned: %d\n", res);
+
+	/* Get Feature */
+	buf[0] = 0x9; /* Report Number */
+	res = ioctl(fd, HIDIOCGFEATURE(256), buf);
+	if (res < 0) {
+		perror("HIDIOCGFEATURE");
+	} else {
+		printf("ioctl HIDIOCGFEATURE returned: %d\n", res);
+		printf("Report data:\n\t");
+		for (i = 0; i < res; i++)
+			printf("%hhx ", buf[i]);
+		puts("\n");
+	}
+
+	/* Send a Report to the Device */
+	buf[0] = 0x1; /* Report Number */
+	buf[1] = 0x77;
+	res = write(fd, buf, 2);
+	if (res < 0) {
+		printf("Error: %d\n", errno);
+		perror("write");
+	} else {
+		printf("write() wrote %d bytes\n", res);
+	}
+
+	/* Get a report from the device */
+	res = read(fd, buf, 16);
+	if (res < 0) {
+		perror("read");
+	} else {
+		printf("read() read %d bytes:\n\t", res);
+		for (i = 0; i < res; i++)
+			printf("%hhx ", buf[i]);
+		puts("\n");
+	}
+	close(fd);
+	return 0;
+}
+
+const char *
+bus_str(int bus)
+{
+	switch (bus) {
+	case BUS_USB:
+		return "USB";
+		break;
+	case BUS_HIL:
+		return "HIL";
+		break;
+	case BUS_BLUETOOTH:
+		return "Bluetooth";
+		break;
+	case BUS_VIRTUAL:
+		return "Virtual";
+		break;
+	default:
+		return "Other";
+		break;
+	}
+}