summaryrefslogtreecommitdiff
path: root/tools
diff options
context:
space:
mode:
Diffstat (limited to 'tools')
-rw-r--r--tools/testing/selftests/Makefile1
-rw-r--r--tools/testing/selftests/net-afpacket/Makefile18
-rw-r--r--tools/testing/selftests/net-afpacket/psock_fanout.c326
-rw-r--r--tools/testing/selftests/net-afpacket/run_afpackettests16
4 files changed, 361 insertions, 0 deletions
diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
index 7c6280f1cf4..7f50078d0e8 100644
--- a/tools/testing/selftests/Makefile
+++ b/tools/testing/selftests/Makefile
@@ -6,6 +6,7 @@ TARGETS += cpu-hotplug
TARGETS += memory-hotplug
TARGETS += efivarfs
TARGETS += net-socket
+TARGETS += net-afpacket
all:
for TARGET in $(TARGETS); do \
diff --git a/tools/testing/selftests/net-afpacket/Makefile b/tools/testing/selftests/net-afpacket/Makefile
new file mode 100644
index 00000000000..45f2ffb7fda
--- /dev/null
+++ b/tools/testing/selftests/net-afpacket/Makefile
@@ -0,0 +1,18 @@
+# Makefile for net-socket selftests
+
+CC = $(CROSS_COMPILE)gcc
+CFLAGS = -Wall
+
+CFLAGS += -I../../../../usr/include/
+
+AF_PACKET_PROGS = psock_fanout
+
+all: $(AF_PACKET_PROGS)
+%: %.c
+ $(CC) $(CFLAGS) -o $@ $^
+
+run_tests: all
+ @/bin/sh ./run_afpackettests || echo "afpackettests: [FAIL]"
+
+clean:
+ $(RM) $(AF_PACKET_PROGS)
diff --git a/tools/testing/selftests/net-afpacket/psock_fanout.c b/tools/testing/selftests/net-afpacket/psock_fanout.c
new file mode 100644
index 00000000000..09dbf93c53d
--- /dev/null
+++ b/tools/testing/selftests/net-afpacket/psock_fanout.c
@@ -0,0 +1,326 @@
+/*
+ * 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_ROLLOVER
+ *
+ * Todo:
+ * - datapath: PACKET_FANOUT_LB
+ * - datapath: PACKET_FANOUT_CPU
+ * - 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.
+ */
+
+#include <arpa/inet.h>
+#include <errno.h>
+#include <linux/filter.h>
+#include <linux/if_packet.h>
+#include <net/ethernet.h>
+#include <netinet/ip.h>
+#include <netinet/udp.h>
+#include <fcntl.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+/* Hack: build even if local includes are old */
+#ifndef PACKET_FANOUT
+#define PACKET_FANOUT 18
+#define PACKET_FANOUT_HASH 0
+#define PACKET_FANOUT_LB 1
+#define PACKET_FANOUT_CPU 2
+#define PACKET_FANOUT_FLAG_DEFRAG 0x8000
+
+#ifndef PACKET_FANOUT_ROLLOVER
+#define PACKET_FANOUT_ROLLOVER 3
+#endif
+
+#ifndef PACKET_FANOUT_FLAG_ROLLOVER
+#define PACKET_FANOUT_FLAG_ROLLOVER 0x1000
+#endif
+
+#endif
+
+#define DATA_LEN 100
+#define DATA_CHAR 'a'
+
+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("bind");
+ 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;
+ }
+
+ val = sizeof(struct iphdr) + sizeof(struct udphdr) + DATA_LEN;
+ val *= num_packets;
+ /* hack: apparently, the above calculation is too small (TODO: fix) */
+ val *= 3;
+ if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &val, sizeof(val))) {
+ perror("setsockopt SO_RCVBUF");
+ exit(1);
+ }
+
+ sock_fanout_setfilter(fd);
+ return fd;
+}
+
+static void sock_fanout_read(int fds[], const int expect[])
+{
+ struct tpacket_stats stats;
+ socklen_t ssize;
+ int ret[2];
+
+ ssize = sizeof(stats);
+ if (getsockopt(fds[0], SOL_PACKET, PACKET_STATISTICS, &stats, &ssize)) {
+ perror("getsockopt statistics 0");
+ exit(1);
+ }
+ ret[0] = stats.tp_packets - stats.tp_drops;
+ ssize = sizeof(stats);
+ if (getsockopt(fds[1], SOL_PACKET, PACKET_STATISTICS, &stats, &ssize)) {
+ perror("getsockopt statistics 1");
+ exit(1);
+ }
+ ret[1] = stats.tp_packets - stats.tp_drops;
+
+ 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");
+ exit(1);
+ }
+}
+
+/* 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 void test_datapath(uint16_t typeflags,
+ const int expect1[], const int expect2[])
+{
+ const int expect0[] = { 0, 0 };
+ int fds[2], fds_udp[2][2];
+
+ 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);
+ }
+ pair_udp_open(fds_udp[0], 8000);
+ pair_udp_open(fds_udp[1], 8002);
+ sock_fanout_read(fds, expect0);
+
+ /* Send data, but not enough to overflow a queue */
+ pair_udp_send(fds_udp[0], 15);
+ pair_udp_send(fds_udp[1], 5);
+ sock_fanout_read(fds, expect1);
+
+ /* Send more data, overflow the queue */
+ pair_udp_send(fds_udp[0], 15);
+ /* TODO: ensure consistent order between expect1 and expect2 */
+ sock_fanout_read(fds, expect2);
+
+ 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);
+ }
+}
+
+int main(int argc, char **argv)
+{
+ const int expect_hash[2][2] = { { 15, 5 }, { 5, 0 } };
+ const int expect_hash_rb[2][2] = { { 15, 5 }, { 5, 10 } };
+ const int expect_rb[2][2] = { { 20, 0 }, { 0, 15 } };
+
+ test_control_single();
+ test_control_group();
+
+ test_datapath(PACKET_FANOUT_HASH, expect_hash[0], expect_hash[1]);
+ test_datapath(PACKET_FANOUT_HASH | PACKET_FANOUT_FLAG_ROLLOVER,
+ expect_hash_rb[0], expect_hash_rb[1]);
+ test_datapath(PACKET_FANOUT_ROLLOVER, expect_rb[0], expect_rb[1]);
+
+ printf("OK. All tests passed\n");
+ return 0;
+}
diff --git a/tools/testing/selftests/net-afpacket/run_afpackettests b/tools/testing/selftests/net-afpacket/run_afpackettests
new file mode 100644
index 00000000000..7907824c635
--- /dev/null
+++ b/tools/testing/selftests/net-afpacket/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