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Date: Thu, 20 Dec 2018 16:22:54 -0500
From: Willem de Bruijn <willemdebruijn.kernel@...il.com>
To: netdev@...r.kernel.org
Cc: davem@...emloft.net, Willem de Bruijn <willemb@...gle.com>,
Soheil Hassas Yeganeh <soheil@...gle.com>
Subject: [PATCH net-next 3/3] selftests: add txtimestamp kselftest
From: Willem de Bruijn <willemb@...gle.com>
Run the transmit timestamp tests as part of kselftests.
Add a txtimestamp.sh test script that runs most variants:
ipv4/ipv6, tcp/udp/raw/raw_ipproto/pf_packet, data/nodata,
setsockopt/cmsg. The script runs tests with netem delays.
Refine txtimestamp.c to validate results. Take expected
netem delays as input and compare against real timestamps.
To run without dependencies, add a listener socket to be
able to connect in the case of TCP.
Add the timestamping directory to the kselftests Makefile.
Build all the binaries. Only run verified txtimestamp.sh.
Signed-off-by: Willem de Bruijn <willemb@...gle.com>
Acked-by: Soheil Hassas Yeganeh <soheil@...gle.com>
---
tools/testing/selftests/Makefile | 1 +
.../networking/timestamping/Makefile | 5 +-
.../selftests/networking/timestamping/config | 2 +
.../networking/timestamping/txtimestamp.c | 136 ++++++++++++++----
.../networking/timestamping/txtimestamp.sh | 58 ++++++++
5 files changed, 174 insertions(+), 28 deletions(-)
create mode 100644 tools/testing/selftests/networking/timestamping/config
create mode 100755 tools/testing/selftests/networking/timestamping/txtimestamp.sh
diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
index f0017c831e57b..24b9934fb2695 100644
--- a/tools/testing/selftests/Makefile
+++ b/tools/testing/selftests/Makefile
@@ -25,6 +25,7 @@ TARGETS += mount
TARGETS += mqueue
TARGETS += net
TARGETS += netfilter
+TARGETS += networking/timestamping
TARGETS += nsfs
TARGETS += powerpc
TARGETS += proc
diff --git a/tools/testing/selftests/networking/timestamping/Makefile b/tools/testing/selftests/networking/timestamping/Makefile
index 14cfcf006936d..6c17a93c4e030 100644
--- a/tools/testing/selftests/networking/timestamping/Makefile
+++ b/tools/testing/selftests/networking/timestamping/Makefile
@@ -1,7 +1,8 @@
# SPDX-License-Identifier: GPL-2.0
CFLAGS += -I../../../../../usr/include
-TEST_PROGS := hwtstamp_config rxtimestamp timestamping txtimestamp
+TEST_GEN_FILES := hwtstamp_config rxtimestamp timestamping txtimestamp
+TEST_PROGS := txtimestamp.sh
all: $(TEST_PROGS)
@@ -9,4 +10,4 @@ top_srcdir = ../../../../..
include ../../lib.mk
clean:
- rm -fr $(TEST_PROGS)
+ rm -fr $(TEST_GEN_FILES)
diff --git a/tools/testing/selftests/networking/timestamping/config b/tools/testing/selftests/networking/timestamping/config
new file mode 100644
index 0000000000000..a13e3169b0a40
--- /dev/null
+++ b/tools/testing/selftests/networking/timestamping/config
@@ -0,0 +1,2 @@
+CONFIG_IFB=y
+CONFIG_NET_SCH_NETEM=y
diff --git a/tools/testing/selftests/networking/timestamping/txtimestamp.c b/tools/testing/selftests/networking/timestamping/txtimestamp.c
index ecc1db5dcfcad..2e563d17cf0c1 100644
--- a/tools/testing/selftests/networking/timestamping/txtimestamp.c
+++ b/tools/testing/selftests/networking/timestamping/txtimestamp.c
@@ -70,17 +70,67 @@ static int do_ipv4 = 1;
static int do_ipv6 = 1;
static int cfg_payload_len = 10;
static int cfg_poll_timeout = 100;
+static int cfg_delay_snd;
+static int cfg_delay_ack;
static bool cfg_show_payload;
static bool cfg_do_pktinfo;
static bool cfg_loop_nodata;
static bool cfg_no_delay;
static bool cfg_use_cmsg;
static bool cfg_use_pf_packet;
+static bool cfg_do_listen;
static uint16_t dest_port = 9000;
static struct sockaddr_in daddr;
static struct sockaddr_in6 daddr6;
-static struct timespec ts_prev;
+static struct timespec ts_usr;
+
+static int saved_tskey = -1;
+static int saved_tskey_type = -1;
+
+static bool test_failed;
+
+static int64_t timespec_to_us64(struct timespec *ts)
+{
+ return ts->tv_sec * 1000 * 1000 + ts->tv_nsec / 1000;
+}
+
+static void validate_key(int tskey, int tstype)
+{
+ int stepsize;
+
+ /* compare key for each subsequent request
+ * must only test for one type, the first one requested
+ */
+ if (saved_tskey == -1)
+ saved_tskey_type = tstype;
+ else if (saved_tskey_type != tstype)
+ return;
+
+ stepsize = cfg_proto == SOCK_STREAM ? cfg_payload_len : 1;
+ if (tskey != saved_tskey + stepsize) {
+ fprintf(stderr, "ERROR: key %d, expected %d\n",
+ tskey, saved_tskey + stepsize);
+ test_failed = true;
+ }
+
+ saved_tskey = tskey;
+}
+
+static void validate_timestamp(struct timespec *cur, int min_delay)
+{
+ int max_delay = min_delay + 500 /* processing time upper bound */;
+ int64_t cur64, start64;
+
+ cur64 = timespec_to_us64(cur);
+ start64 = timespec_to_us64(&ts_usr);
+
+ if (cur64 < start64 + min_delay || cur64 > start64 + max_delay) {
+ fprintf(stderr, "ERROR: delay %lu expected between %d and %d\n",
+ cur64 - start64, min_delay, max_delay);
+ test_failed = true;
+ }
+}
static void __print_timestamp(const char *name, struct timespec *cur,
uint32_t key, int payload_len)
@@ -92,32 +142,19 @@ static void __print_timestamp(const char *name, struct timespec *cur,
name, cur->tv_sec, cur->tv_nsec / 1000,
key, payload_len);
- if ((ts_prev.tv_sec | ts_prev.tv_nsec)) {
- int64_t cur_ms, prev_ms;
-
- cur_ms = (long) cur->tv_sec * 1000 * 1000;
- cur_ms += cur->tv_nsec / 1000;
-
- prev_ms = (long) ts_prev.tv_sec * 1000 * 1000;
- prev_ms += ts_prev.tv_nsec / 1000;
+ if (cur != &ts_usr)
+ fprintf(stderr, " (USR %+" PRId64 " us)",
+ timespec_to_us64(cur) - timespec_to_us64(&ts_usr));
- fprintf(stderr, " (%+" PRId64 " us)", cur_ms - prev_ms);
- }
-
- ts_prev = *cur;
fprintf(stderr, "\n");
}
static void print_timestamp_usr(void)
{
- struct timespec ts;
- struct timeval tv; /* avoid dependency on -lrt */
-
- gettimeofday(&tv, NULL);
- ts.tv_sec = tv.tv_sec;
- ts.tv_nsec = tv.tv_usec * 1000;
+ if (clock_gettime(CLOCK_REALTIME, &ts_usr))
+ error(1, errno, "clock_gettime");
- __print_timestamp(" USR", &ts, 0, 0);
+ __print_timestamp(" USR", &ts_usr, 0, 0);
}
static void print_timestamp(struct scm_timestamping *tss, int tstype,
@@ -125,15 +162,20 @@ static void print_timestamp(struct scm_timestamping *tss, int tstype,
{
const char *tsname;
+ validate_key(tskey, tstype);
+
switch (tstype) {
case SCM_TSTAMP_SCHED:
tsname = " ENQ";
+ validate_timestamp(&tss->ts[0], 0);
break;
case SCM_TSTAMP_SND:
tsname = " SND";
+ validate_timestamp(&tss->ts[0], cfg_delay_snd);
break;
case SCM_TSTAMP_ACK:
tsname = " ACK";
+ validate_timestamp(&tss->ts[0], cfg_delay_ack);
break;
default:
error(1, 0, "unknown timestamp type: %u",
@@ -389,6 +431,9 @@ static void do_test(int family, unsigned int report_opt)
if (fd < 0)
error(1, errno, "socket");
+ /* reset expected key on each new socket */
+ saved_tskey = -1;
+
if (cfg_proto == SOCK_STREAM) {
if (setsockopt(fd, IPPROTO_TCP, TCP_NODELAY,
(char*) &val, sizeof(val)))
@@ -431,7 +476,6 @@ static void do_test(int family, unsigned int report_opt)
for (i = 0; i < cfg_num_pkts; i++) {
memset(&msg, 0, sizeof(msg));
- memset(&ts_prev, 0, sizeof(ts_prev));
memset(buf, 'a' + i, total_len);
if (cfg_use_pf_packet || cfg_proto == SOCK_RAW) {
@@ -506,7 +550,7 @@ static void do_test(int family, unsigned int report_opt)
error(1, errno, "close");
free(buf);
- usleep(400 * 1000);
+ usleep(100 * 1000);
}
static void __attribute__((noreturn)) usage(const char *filepath)
@@ -522,12 +566,15 @@ static void __attribute__((noreturn)) usage(const char *filepath)
" -F: poll() waits forever for an event\n"
" -I: request PKTINFO\n"
" -l N: send N bytes at a time\n"
+ " -L listen on hostname and port\n"
" -n: set no-payload option\n"
" -p N: connect to port N\n"
" -P: use PF_PACKET\n"
" -r: use raw\n"
" -R: use raw (IP_HDRINCL)\n"
" -u: use udp\n"
+ " -v: validate SND delay (usec)\n"
+ " -V: validate ACK delay (usec)\n"
" -x: show payload (up to 70 bytes)\n",
filepath);
exit(1);
@@ -538,7 +585,7 @@ static void parse_opt(int argc, char **argv)
int proto_count = 0;
int c;
- while ((c = getopt(argc, argv, "46c:CDFhIl:np:PrRux")) != -1) {
+ while ((c = getopt(argc, argv, "46c:CDFhIl:Lnp:PrRuv:V:x")) != -1) {
switch (c) {
case '4':
do_ipv6 = 0;
@@ -564,6 +611,9 @@ static void parse_opt(int argc, char **argv)
case 'l':
cfg_payload_len = strtoul(optarg, NULL, 10);
break;
+ case 'L':
+ cfg_do_listen = true;
+ break;
case 'n':
cfg_loop_nodata = true;
break;
@@ -591,6 +641,12 @@ static void parse_opt(int argc, char **argv)
cfg_proto = SOCK_DGRAM;
cfg_ipproto = IPPROTO_UDP;
break;
+ case 'v':
+ cfg_delay_snd = strtoul(optarg, NULL, 10);
+ break;
+ case 'V':
+ cfg_delay_ack = strtoul(optarg, NULL, 10);
+ break;
case 'x':
cfg_show_payload = true;
break;
@@ -651,6 +707,27 @@ static void resolve_hostname(const char *hostname)
do_ipv6 &= have_ipv6;
}
+static void do_listen(int family, void *addr, int alen)
+{
+ int fd, type;
+
+ type = cfg_proto == SOCK_RAW ? SOCK_DGRAM : cfg_proto;
+
+ fd = socket(family, type, 0);
+ if (fd == -1)
+ error(1, errno, "socket rx");
+
+ if (bind(fd, addr, alen))
+ error(1, errno, "bind rx");
+
+ if (type == SOCK_STREAM && listen(fd, 10))
+ error(1, errno, "listen rx");
+
+ /* leave fd open, will be closed on process exit.
+ * this enables connect() to succeed and avoids icmp replies
+ */
+}
+
static void do_main(int family)
{
fprintf(stderr, "family: %s %s\n",
@@ -697,10 +774,17 @@ int main(int argc, char **argv)
fprintf(stderr, "server port: %u\n", dest_port);
fprintf(stderr, "\n");
- if (do_ipv4)
+ if (do_ipv4) {
+ if (cfg_do_listen)
+ do_listen(PF_INET, &daddr, sizeof(daddr));
do_main(PF_INET);
- if (do_ipv6)
+ }
+
+ if (do_ipv6) {
+ if (cfg_do_listen)
+ do_listen(PF_INET6, &daddr6, sizeof(daddr6));
do_main(PF_INET6);
+ }
- return 0;
+ return test_failed;
}
diff --git a/tools/testing/selftests/networking/timestamping/txtimestamp.sh b/tools/testing/selftests/networking/timestamping/txtimestamp.sh
new file mode 100755
index 0000000000000..daf18d4d668e2
--- /dev/null
+++ b/tools/testing/selftests/networking/timestamping/txtimestamp.sh
@@ -0,0 +1,58 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+#
+# Send packets with transmit timestamps over loopback with netem
+# Verify that timestamps correspond to netem delay
+
+set -e
+
+setup() {
+ # set 1ms delay on lo egress
+ tc qdisc add dev lo root netem delay 1ms
+
+ # set 2ms delay on ifb0 egress
+ modprobe ifb
+ ip link add ifb_netem0 type ifb
+ ip link set dev ifb_netem0 up
+ tc qdisc add dev ifb_netem0 root netem delay 2ms
+
+ # redirect lo ingress through ifb0 egress
+ tc qdisc add dev lo handle ffff: ingress
+ tc filter add dev lo parent ffff: \
+ u32 match mark 0 0xffff \
+ action mirred egress redirect dev ifb_netem0
+}
+
+run_test_v4v6() {
+ # SND will be delayed 1000us
+ # ACK will be delayed 6000us: 1 + 2 ms round-trip
+ local -r args="$@ -v 1000 -V 6000"
+
+ ./txtimestamp ${args} -4 -L 127.0.0.1
+ ./txtimestamp ${args} -6 -L ::1
+}
+
+run_test_tcpudpraw() {
+ local -r args=$@
+
+ run_test_v4v6 ${args} # tcp
+ run_test_v4v6 ${args} -u # udp
+ run_test_v4v6 ${args} -r # raw
+ run_test_v4v6 ${args} -R # raw (IPPROTO_RAW)
+ run_test_v4v6 ${args} -P # pf_packet
+}
+
+run_test_all() {
+ run_test_tcpudpraw # setsockopt
+ run_test_tcpudpraw -C # cmsg
+ run_test_tcpudpraw -n # timestamp w/o data
+}
+
+if [[ "$(ip netns identify)" == "root" ]]; then
+ ../../net/in_netns.sh $0 $@
+else
+ setup
+ run_test_all
+ echo "OK. All tests passed"
+fi
+
--
2.20.1.415.g653613c723-goog
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