net: Move selftests to common net/ subdirectory.

Suggested-by: Daniel Baluta <daniel.baluta@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

5 files changed, 527 insertions, 0 deletions

diff --git a/tools/testing/selftests/net/Makefile b/tools/testing/selftests/net/Makefile
new file mode 100644
index 000000000000..bd6e272bab87
--- /dev/null
+++ b/tools/testing/selftests/net/Makefile
@@ -0,0 +1,19 @@
+# Makefile for net selftests
+
+CC = $(CROSS_COMPILE)gcc
+CFLAGS = -Wall
+
+CFLAGS += -I../../../../usr/include/
+
+NET_PROGS = socket psock_fanout
+
+all: $(NET_PROGS)
+%: %.c
+	$(CC) $(CFLAGS) -o $@ $^
+
+run_tests: all
+	@/bin/sh ./run_netsocktests || echo "sockettests: [FAIL]"
+	@/bin/sh ./run_afpackettests || echo "afpackettests: [FAIL]"
+
+clean:
+	$(RM) $(NET_PROGS)
diff --git a/tools/testing/selftests/net/psock_fanout.c b/tools/testing/selftests/net/psock_fanout.c
new file mode 100644
index 000000000000..226e5e33105a
--- /dev/null
+++ b/tools/testing/selftests/net/psock_fanout.c
@@ -0,0 +1,388 @@
+/*
+ * Copyright 2013 Google Inc.
+ * Author: Willem de Bruijn (willemb@google.com)
+ *
+ * A basic test of packet socket fanout behavior.
+ *
+ * Control:
+ * - create fanout fails as expected with illegal flag combinations
+ * - join   fanout fails as expected with diverging types or flags
+ *
+ * Datapath:
+ *   Open a pair of packet sockets and a pair of INET sockets, send a known
+ *   number of packets across the two INET sockets and count the number of
+ *   packets enqueued onto the two packet sockets.
+ *
+ *   The test currently runs for
+ *   - PACKET_FANOUT_HASH
+ *   - PACKET_FANOUT_HASH with PACKET_FANOUT_FLAG_ROLLOVER
+ *   - PACKET_FANOUT_LB
+ *   - PACKET_FANOUT_CPU
+ *   - PACKET_FANOUT_ROLLOVER
+ *
+ * Todo:
+ * - functionality: PACKET_FANOUT_FLAG_DEFRAG
+ *
+ * License (GPLv2):
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. * See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#define _GNU_SOURCE		/* for sched_setaffinity */
+
+#include <arpa/inet.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <linux/filter.h>
+#include <linux/if_packet.h>
+#include <net/ethernet.h>
+#include <netinet/ip.h>
+#include <netinet/udp.h>
+#include <poll.h>
+#include <sched.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/mman.h>
+#include <sys/socket.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#define DATA_LEN			100
+#define DATA_CHAR			'a'
+#define RING_NUM_FRAMES			20
+#define PORT_BASE			8000
+
+static void pair_udp_open(int fds[], uint16_t port)
+{
+	struct sockaddr_in saddr, daddr;
+
+	fds[0] = socket(PF_INET, SOCK_DGRAM, 0);
+	fds[1] = socket(PF_INET, SOCK_DGRAM, 0);
+	if (fds[0] == -1 || fds[1] == -1) {
+		fprintf(stderr, "ERROR: socket dgram\n");
+		exit(1);
+	}
+
+	memset(&saddr, 0, sizeof(saddr));
+	saddr.sin_family = AF_INET;
+	saddr.sin_port = htons(port);
+	saddr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
+
+	memset(&daddr, 0, sizeof(daddr));
+	daddr.sin_family = AF_INET;
+	daddr.sin_port = htons(port + 1);
+	daddr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
+
+	/* must bind both to get consistent hash result */
+	if (bind(fds[1], (void *) &daddr, sizeof(daddr))) {
+		perror("bind");
+		exit(1);
+	}
+	if (bind(fds[0], (void *) &saddr, sizeof(saddr))) {
+		perror("bind");
+		exit(1);
+	}
+	if (connect(fds[0], (void *) &daddr, sizeof(daddr))) {
+		perror("connect");
+		exit(1);
+	}
+}
+
+static void pair_udp_send(int fds[], int num)
+{
+	char buf[DATA_LEN], rbuf[DATA_LEN];
+
+	memset(buf, DATA_CHAR, sizeof(buf));
+	while (num--) {
+		/* Should really handle EINTR and EAGAIN */
+		if (write(fds[0], buf, sizeof(buf)) != sizeof(buf)) {
+			fprintf(stderr, "ERROR: send failed left=%d\n", num);
+			exit(1);
+		}
+		if (read(fds[1], rbuf, sizeof(rbuf)) != sizeof(rbuf)) {
+			fprintf(stderr, "ERROR: recv failed left=%d\n", num);
+			exit(1);
+		}
+		if (memcmp(buf, rbuf, sizeof(buf))) {
+			fprintf(stderr, "ERROR: data failed left=%d\n", num);
+			exit(1);
+		}
+	}
+}
+
+static void sock_fanout_setfilter(int fd)
+{
+	struct sock_filter bpf_filter[] = {
+		{ 0x80, 0, 0, 0x00000000 },  /* LD  pktlen		      */
+		{ 0x35, 0, 5, DATA_LEN   },  /* JGE DATA_LEN  [f goto nomatch]*/
+		{ 0x30, 0, 0, 0x00000050 },  /* LD  ip[80]		      */
+		{ 0x15, 0, 3, DATA_CHAR  },  /* JEQ DATA_CHAR [f goto nomatch]*/
+		{ 0x30, 0, 0, 0x00000051 },  /* LD  ip[81]		      */
+		{ 0x15, 0, 1, DATA_CHAR  },  /* JEQ DATA_CHAR [f goto nomatch]*/
+		{ 0x6, 0, 0, 0x00000060  },  /* RET match	              */
+/* nomatch */	{ 0x6, 0, 0, 0x00000000  },  /* RET no match		      */
+	};
+	struct sock_fprog bpf_prog;
+
+	bpf_prog.filter = bpf_filter;
+	bpf_prog.len = sizeof(bpf_filter) / sizeof(struct sock_filter);
+	if (setsockopt(fd, SOL_SOCKET, SO_ATTACH_FILTER, &bpf_prog,
+		       sizeof(bpf_prog))) {
+		perror("setsockopt SO_ATTACH_FILTER");
+		exit(1);
+	}
+}
+
+/* Open a socket in a given fanout mode.
+ * @return -1 if mode is bad, a valid socket otherwise */
+static int sock_fanout_open(uint16_t typeflags, int num_packets)
+{
+	int fd, val;
+
+	fd = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_IP));
+	if (fd < 0) {
+		perror("socket packet");
+		exit(1);
+	}
+
+	/* fanout group ID is always 0: tests whether old groups are deleted */
+	val = ((int) typeflags) << 16;
+	if (setsockopt(fd, SOL_PACKET, PACKET_FANOUT, &val, sizeof(val))) {
+		if (close(fd)) {
+			perror("close packet");
+			exit(1);
+		}
+		return -1;
+	}
+
+	sock_fanout_setfilter(fd);
+	return fd;
+}
+
+static char *sock_fanout_open_ring(int fd)
+{
+	struct tpacket_req req = {
+		.tp_block_size = getpagesize(),
+		.tp_frame_size = getpagesize(),
+		.tp_block_nr   = RING_NUM_FRAMES,
+		.tp_frame_nr   = RING_NUM_FRAMES,
+	};
+	char *ring;
+
+	if (setsockopt(fd, SOL_PACKET, PACKET_RX_RING, (void *) &req,
+		       sizeof(req))) {
+		perror("packetsock ring setsockopt");
+		exit(1);
+	}
+
+	ring = mmap(0, req.tp_block_size * req.tp_block_nr,
+		    PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
+	if (!ring) {
+		fprintf(stderr, "packetsock ring mmap\n");
+		exit(1);
+	}
+
+	return ring;
+}
+
+static int sock_fanout_read_ring(int fd, void *ring)
+{
+	struct tpacket_hdr *header = ring;
+	int count = 0;
+
+	while (header->tp_status & TP_STATUS_USER && count < RING_NUM_FRAMES) {
+		count++;
+		header = ring + (count * getpagesize());
+	}
+
+	return count;
+}
+
+static int sock_fanout_read(int fds[], char *rings[], const int expect[])
+{
+	int ret[2];
+
+	ret[0] = sock_fanout_read_ring(fds[0], rings[0]);
+	ret[1] = sock_fanout_read_ring(fds[1], rings[1]);
+
+	fprintf(stderr, "info: count=%d,%d, expect=%d,%d\n",
+			ret[0], ret[1], expect[0], expect[1]);
+
+	if ((!(ret[0] == expect[0] && ret[1] == expect[1])) &&
+	    (!(ret[0] == expect[1] && ret[1] == expect[0]))) {
+		fprintf(stderr, "ERROR: incorrect queue lengths\n");
+		return 1;
+	}
+
+	return 0;
+}
+
+/* Test illegal mode + flag combination */
+static void test_control_single(void)
+{
+	fprintf(stderr, "test: control single socket\n");
+
+	if (sock_fanout_open(PACKET_FANOUT_ROLLOVER |
+			       PACKET_FANOUT_FLAG_ROLLOVER, 0) != -1) {
+		fprintf(stderr, "ERROR: opened socket with dual rollover\n");
+		exit(1);
+	}
+}
+
+/* Test illegal group with different modes or flags */
+static void test_control_group(void)
+{
+	int fds[2];
+
+	fprintf(stderr, "test: control multiple sockets\n");
+
+	fds[0] = sock_fanout_open(PACKET_FANOUT_HASH, 20);
+	if (fds[0] == -1) {
+		fprintf(stderr, "ERROR: failed to open HASH socket\n");
+		exit(1);
+	}
+	if (sock_fanout_open(PACKET_FANOUT_HASH |
+			       PACKET_FANOUT_FLAG_DEFRAG, 10) != -1) {
+		fprintf(stderr, "ERROR: joined group with wrong flag defrag\n");
+		exit(1);
+	}
+	if (sock_fanout_open(PACKET_FANOUT_HASH |
+			       PACKET_FANOUT_FLAG_ROLLOVER, 10) != -1) {
+		fprintf(stderr, "ERROR: joined group with wrong flag ro\n");
+		exit(1);
+	}
+	if (sock_fanout_open(PACKET_FANOUT_CPU, 10) != -1) {
+		fprintf(stderr, "ERROR: joined group with wrong mode\n");
+		exit(1);
+	}
+	fds[1] = sock_fanout_open(PACKET_FANOUT_HASH, 20);
+	if (fds[1] == -1) {
+		fprintf(stderr, "ERROR: failed to join group\n");
+		exit(1);
+	}
+	if (close(fds[1]) || close(fds[0])) {
+		fprintf(stderr, "ERROR: closing sockets\n");
+		exit(1);
+	}
+}
+
+static int test_datapath(uint16_t typeflags, int port_off,
+			 const int expect1[], const int expect2[])
+{
+	const int expect0[] = { 0, 0 };
+	char *rings[2];
+	int fds[2], fds_udp[2][2], ret;
+
+	fprintf(stderr, "test: datapath 0x%hx\n", typeflags);
+
+	fds[0] = sock_fanout_open(typeflags, 20);
+	fds[1] = sock_fanout_open(typeflags, 20);
+	if (fds[0] == -1 || fds[1] == -1) {
+		fprintf(stderr, "ERROR: failed open\n");
+		exit(1);
+	}
+	rings[0] = sock_fanout_open_ring(fds[0]);
+	rings[1] = sock_fanout_open_ring(fds[1]);
+	pair_udp_open(fds_udp[0], PORT_BASE);
+	pair_udp_open(fds_udp[1], PORT_BASE + port_off);
+	sock_fanout_read(fds, rings, expect0);
+
+	/* Send data, but not enough to overflow a queue */
+	pair_udp_send(fds_udp[0], 15);
+	pair_udp_send(fds_udp[1], 5);
+	ret = sock_fanout_read(fds, rings, expect1);
+
+	/* Send more data, overflow the queue */
+	pair_udp_send(fds_udp[0], 15);
+	/* TODO: ensure consistent order between expect1 and expect2 */
+	ret |= sock_fanout_read(fds, rings, expect2);
+
+	if (munmap(rings[1], RING_NUM_FRAMES * getpagesize()) ||
+	    munmap(rings[0], RING_NUM_FRAMES * getpagesize())) {
+		fprintf(stderr, "close rings\n");
+		exit(1);
+	}
+	if (close(fds_udp[1][1]) || close(fds_udp[1][0]) ||
+	    close(fds_udp[0][1]) || close(fds_udp[0][0]) ||
+	    close(fds[1]) || close(fds[0])) {
+		fprintf(stderr, "close datapath\n");
+		exit(1);
+	}
+
+	return ret;
+}
+
+static int set_cpuaffinity(int cpuid)
+{
+	cpu_set_t mask;
+
+	CPU_ZERO(&mask);
+	CPU_SET(cpuid, &mask);
+	if (sched_setaffinity(0, sizeof(mask), &mask)) {
+		if (errno != EINVAL) {
+			fprintf(stderr, "setaffinity %d\n", cpuid);
+			exit(1);
+		}
+		return 1;
+	}
+
+	return 0;
+}
+
+int main(int argc, char **argv)
+{
+	const int expect_hash[2][2]	= { { 15, 5 },  { 20, 5 } };
+	const int expect_hash_rb[2][2]	= { { 15, 5 },  { 20, 15 } };
+	const int expect_lb[2][2]	= { { 10, 10 }, { 18, 17 } };
+	const int expect_rb[2][2]	= { { 20, 0 },  { 20, 15 } };
+	const int expect_cpu0[2][2]	= { { 20, 0 },  { 20, 0 } };
+	const int expect_cpu1[2][2]	= { { 0, 20 },  { 0, 20 } };
+	int port_off = 2, tries = 5, ret;
+
+	test_control_single();
+	test_control_group();
+
+	/* find a set of ports that do not collide onto the same socket */
+	ret = test_datapath(PACKET_FANOUT_HASH, port_off,
+			    expect_hash[0], expect_hash[1]);
+	while (ret && tries--) {
+		fprintf(stderr, "info: trying alternate ports (%d)\n", tries);
+		ret = test_datapath(PACKET_FANOUT_HASH, ++port_off,
+				    expect_hash[0], expect_hash[1]);
+	}
+
+	ret |= test_datapath(PACKET_FANOUT_HASH | PACKET_FANOUT_FLAG_ROLLOVER,
+			     port_off, expect_hash_rb[0], expect_hash_rb[1]);
+	ret |= test_datapath(PACKET_FANOUT_LB,
+			     port_off, expect_lb[0], expect_lb[1]);
+	ret |= test_datapath(PACKET_FANOUT_ROLLOVER,
+			     port_off, expect_rb[0], expect_rb[1]);
+
+	set_cpuaffinity(0);
+	ret |= test_datapath(PACKET_FANOUT_CPU, port_off,
+			     expect_cpu0[0], expect_cpu0[1]);
+	if (!set_cpuaffinity(1))
+		/* TODO: test that choice alternates with previous */
+		ret |= test_datapath(PACKET_FANOUT_CPU, port_off,
+				     expect_cpu1[0], expect_cpu1[1]);
+
+	if (ret)
+		return 1;
+
+	printf("OK. All tests passed\n");
+	return 0;
+}
diff --git a/tools/testing/selftests/net/run_afpackettests b/tools/testing/selftests/net/run_afpackettests
new file mode 100644
index 000000000000..7907824c6355
--- /dev/null
+++ b/tools/testing/selftests/net/run_afpackettests
@@ -0,0 +1,16 @@
+#!/bin/sh
+
+if [ $(id -u) != 0 ]; then
+	echo $msg must be run as root >&2
+	exit 0
+fi
+
+echo "--------------------"
+echo "running psock_fanout test"
+echo "--------------------"
+./psock_fanout
+if [ $? -ne 0 ]; then
+	echo "[FAIL]"
+else
+	echo "[PASS]"
+fi
diff --git a/tools/testing/selftests/net/run_netsocktests b/tools/testing/selftests/net/run_netsocktests
new file mode 100644
index 000000000000..c09a682df56a
--- /dev/null
+++ b/tools/testing/selftests/net/run_netsocktests
@@ -0,0 +1,12 @@
+#!/bin/bash
+
+echo "--------------------"
+echo "running socket test"
+echo "--------------------"
+./socket
+if [ $? -ne 0 ]; then
+	echo "[FAIL]"
+else
+	echo "[PASS]"
+fi
+
diff --git a/tools/testing/selftests/net/socket.c b/tools/testing/selftests/net/socket.c
new file mode 100644
index 000000000000..0f227f2f9be9
--- /dev/null
+++ b/tools/testing/selftests/net/socket.c
@@ -0,0 +1,92 @@
+#include <stdio.h>
+#include <errno.h>
+#include <unistd.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+
+struct socket_testcase {
+	int	domain;
+	int	type;
+	int	protocol;
+
+	/* 0    = valid file descriptor
+	 * -foo = error foo
+	 */
+	int	expect;
+
+	/* If non-zero, accept EAFNOSUPPORT to handle the case
+	 * of the protocol not being configured into the kernel.
+	 */
+	int	nosupport_ok;
+};
+
+static struct socket_testcase tests[] = {
+	{ AF_MAX,  0,           0,           -EAFNOSUPPORT,    0 },
+	{ AF_INET, SOCK_STREAM, IPPROTO_TCP, 0,                1  },
+	{ AF_INET, SOCK_DGRAM,  IPPROTO_TCP, -EPROTONOSUPPORT, 1  },
+	{ AF_INET, SOCK_DGRAM,  IPPROTO_UDP, 0,                1  },
+	{ AF_INET, SOCK_STREAM, IPPROTO_UDP, -EPROTONOSUPPORT, 1  },
+};
+
+#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
+#define ERR_STRING_SZ	64
+
+static int run_tests(void)
+{
+	char err_string1[ERR_STRING_SZ];
+	char err_string2[ERR_STRING_SZ];
+	int i, err;
+
+	err = 0;
+	for (i = 0; i < ARRAY_SIZE(tests); i++) {
+		struct socket_testcase *s = &tests[i];
+		int fd;
+
+		fd = socket(s->domain, s->type, s->protocol);
+		if (fd < 0) {
+			if (s->nosupport_ok &&
+			    errno == EAFNOSUPPORT)
+				continue;
+
+			if (s->expect < 0 &&
+			    errno == -s->expect)
+				continue;
+
+			strerror_r(-s->expect, err_string1, ERR_STRING_SZ);
+			strerror_r(errno, err_string2, ERR_STRING_SZ);
+
+			fprintf(stderr, "socket(%d, %d, %d) expected "
+				"err (%s) got (%s)\n",
+				s->domain, s->type, s->protocol,
+				err_string1, err_string2);
+
+			err = -1;
+			break;
+		} else {
+			close(fd);
+
+			if (s->expect < 0) {
+				strerror_r(errno, err_string1, ERR_STRING_SZ);
+
+				fprintf(stderr, "socket(%d, %d, %d) expected "
+					"success got err (%s)\n",
+					s->domain, s->type, s->protocol,
+					err_string1);
+
+				err = -1;
+				break;
+			}
+		}
+	}
+
+	return err;
+}
+
+int main(void)
+{
+	int err = run_tests();
+
+	return err;
+}