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ovs/tests/test-conntrack.c

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/*
* Copyright (c) 2015, 2017 Nicira, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <config.h>
#include "conntrack.h"
#include "dp-packet.h"
#include "fatal-signal.h"
#include "flow.h"
#include "netdev.h"
#include "ovs-thread.h"
#include "ovstest.h"
#include "pcap-file.h"
#include "timeval.h"
static const char payload[] = "50540000000a50540000000908004500001c0000000000"
"11a4cd0a0101010a0101020001000200080000";
static struct dp_packet_batch *
prepare_packets(size_t n, bool change, unsigned tid, ovs_be16 *dl_type)
{
struct dp_packet_batch *pkt_batch = xzalloc(sizeof *pkt_batch);
struct flow flow;
size_t i;
ovs_assert(n <= ARRAY_SIZE(pkt_batch->packets));
dp_packet_batch_init(pkt_batch);
for (i = 0; i < n; i++) {
struct udp_header *udp;
struct dp_packet *pkt = dp_packet_new(sizeof payload/2);
dp_packet_put_hex(pkt, payload, NULL);
flow_extract(pkt, &flow);
udp = dp_packet_l4(pkt);
udp->udp_src = htons(ntohs(udp->udp_src) + tid);
if (change) {
udp->udp_dst = htons(ntohs(udp->udp_dst) + i);
}
dp_packet_batch_add(pkt_batch, pkt);
*dl_type = flow.dl_type;
}
return pkt_batch;
}
static void
destroy_packets(struct dp_packet_batch *pkt_batch)
{
dp_packet_delete_batch(pkt_batch, true);
free(pkt_batch);
}
struct thread_aux {
pthread_t thread;
unsigned tid;
};
static struct conntrack *ct;
static unsigned long n_threads, n_pkts, batch_size;
static bool change_conn = false;
static struct ovs_barrier barrier;
static void *
ct_thread_main(void *aux_)
{
struct thread_aux *aux = aux_;
struct dp_packet_batch *pkt_batch;
struct dp_packet *pkt;
ovs_be16 dl_type;
size_t i;
long long now = time_msec();
pkt_batch = prepare_packets(batch_size, change_conn, aux->tid, &dl_type);
ovs_barrier_block(&barrier);
for (i = 0; i < n_pkts; i += batch_size) {
conntrack_execute(ct, pkt_batch, dl_type, false, true, 0, NULL, NULL,
NULL, NULL, now, 0);
DP_PACKET_BATCH_FOR_EACH (j, pkt, pkt_batch) {
pkt_metadata_init_conn(&pkt->md);
}
}
ovs_barrier_block(&barrier);
destroy_packets(pkt_batch);
return NULL;
}
static void
test_benchmark(struct ovs_cmdl_context *ctx)
{
struct thread_aux *threads;
long long start;
unsigned i;
fatal_signal_init();
/* Parse arguments */
n_threads = strtoul(ctx->argv[1], NULL, 0);
if (!n_threads) {
ovs_fatal(0, "n_threads must be at least one");
}
n_pkts = strtoul(ctx->argv[2], NULL, 0);
batch_size = strtoul(ctx->argv[3], NULL, 0);
if (batch_size == 0 || batch_size > NETDEV_MAX_BURST) {
ovs_fatal(0, "batch_size must be between 1 and NETDEV_MAX_BURST(%u)",
NETDEV_MAX_BURST);
}
if (ctx->argc > 4) {
change_conn = strtoul(ctx->argv[4], NULL, 0);
}
threads = xcalloc(n_threads, sizeof *threads);
ovs_barrier_init(&barrier, n_threads + 1);
ct = conntrack_init();
/* Create threads */
for (i = 0; i < n_threads; i++) {
threads[i].tid = i;
threads[i].thread = ovs_thread_create("ct_thread", ct_thread_main,
&threads[i]);
}
/* Starts the work inside the threads */
ovs_barrier_block(&barrier);
start = time_msec();
/* Wait for the threads to finish the work */
ovs_barrier_block(&barrier);
printf("conntrack: %5lld ms\n", time_msec() - start);
for (i = 0; i < n_threads; i++) {
xpthread_join(threads[i].thread, NULL);
}
conntrack_destroy(ct);
ovs_barrier_destroy(&barrier);
free(threads);
}
static void
pcap_batch_execute_conntrack(struct conntrack *ct_,
struct dp_packet_batch *pkt_batch)
{
struct dp_packet_batch new_batch;
ovs_be16 dl_type = htons(0);
long long now = time_msec();
dp_packet_batch_init(&new_batch);
/* pkt_batch contains packets with different 'dl_type'. We have to
* call conntrack_execute() on packets with the same 'dl_type'. */
struct dp_packet *packet;
DP_PACKET_BATCH_FOR_EACH (i, packet, pkt_batch) {
struct flow flow;
/* This also initializes the l3 and l4 pointers. */
flow_extract(packet, &flow);
if (dp_packet_batch_is_empty(&new_batch)) {
dl_type = flow.dl_type;
}
if (flow.dl_type != dl_type) {
conntrack_execute(ct_, &new_batch, dl_type, false, true, 0,
NULL, NULL, NULL, NULL, now, 0);
dp_packet_batch_init(&new_batch);
}
dp_packet_batch_add(&new_batch, packet);
}
if (!dp_packet_batch_is_empty(&new_batch)) {
conntrack_execute(ct_, &new_batch, dl_type, false, true, 0, NULL, NULL,
NULL, NULL, now, 0);
}
}
static void
test_pcap(struct ovs_cmdl_context *ctx)
{
size_t total_count, batch_size_;
struct pcap_file *pcap;
int err = 0;
pcap = ovs_pcap_open(ctx->argv[1], "rb");
if (!pcap) {
return;
}
batch_size_ = 1;
if (ctx->argc > 2) {
batch_size_ = strtoul(ctx->argv[2], NULL, 0);
if (batch_size_ == 0 || batch_size_ > NETDEV_MAX_BURST) {
ovs_fatal(0,
"batch_size must be between 1 and NETDEV_MAX_BURST(%u)",
NETDEV_MAX_BURST);
}
}
fatal_signal_init();
ct = conntrack_init();
total_count = 0;
for (;;) {
struct dp_packet *packet;
struct dp_packet_batch pkt_batch_;
struct dp_packet_batch *batch = &pkt_batch_;
dp_packet_batch_init(batch);
for (int i = 0; i < batch_size_; i++) {
err = ovs_pcap_read(pcap, &packet, NULL);
if (err) {
break;
}
dp_packet_batch_add(batch, packet);
}
if (dp_packet_batch_is_empty(batch)) {
break;
}
pcap_batch_execute_conntrack(ct, batch);
DP_PACKET_BATCH_FOR_EACH (i, packet, batch) {
struct ds ds = DS_EMPTY_INITIALIZER;
total_count++;
format_flags(&ds, ct_state_to_string, packet->md.ct_state, '|');
printf("%"PRIuSIZE": %s\n", total_count, ds_cstr(&ds));
ds_destroy(&ds);
}
dp_packet_delete_batch(batch, true);
}
conntrack_destroy(ct);
ovs_pcap_close(pcap);
}
static const struct ovs_cmdl_command commands[] = {
/* Connection tracker tests. */
/* Starts 'n_threads' threads. Each thread will send 'n_pkts' packets to
* the connection tracker, 'batch_size' per call. If 'change_connection'
* is '1', each packet in a batch will have a different source and
* destination port */
{"benchmark", "n_threads n_pkts batch_size [change_connection]", 3, 4,
test_benchmark, OVS_RO},
/* Reads packets from 'file' and sends them to the connection tracker,
* 'batch_size' (1 by default) per call, with the commit flag set.
* Prints the ct_state of each packet. */
{"pcap", "file [batch_size]", 1, 2, test_pcap, OVS_RO},
{NULL, NULL, 0, 0, NULL, OVS_RO},
};
static void
test_conntrack_main(int argc, char *argv[])
{
struct ovs_cmdl_context ctx = {
.argc = argc - 1,
.argv = argv + 1,
};
set_program_name(argv[0]);
ovs_cmdl_run_command(&ctx, commands);
}
OVSTEST_REGISTER("test-conntrack", test_conntrack_main);