In udp_tap_handler() the array of msghdr structures, mm[], is initialized to zero. Since UIO_MAXIOV is 1024, this can be quite a large zero, which is expensive if we only end up using a few of its entries. It also makes it less obvious how we're setting all the control fields at the point we actually invoke sendmmsg(). Rather than pre-initializing it, just initialize each element as we use it. Signed-off-by: David Gibson --- udp.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/udp.c b/udp.c index c4ebecc..864e7b2 100644 --- a/udp.c +++ b/udp.c @@ -968,7 +968,7 @@ void udp_sock_handler(const struct ctx *c, union epoll_ref ref, uint32_t events, int udp_tap_handler(struct ctx *c, int af, const void *addr, const struct pool *p, const struct timespec *now) { - struct mmsghdr mm[UIO_MAXIOV] = { 0 }; + struct mmsghdr mm[UIO_MAXIOV]; struct iovec m[UIO_MAXIOV]; struct sockaddr_in6 s_in6; struct sockaddr_in s_in; @@ -1087,6 +1087,10 @@ int udp_tap_handler(struct ctx *c, int af, const void *addr, mm[i].msg_hdr.msg_iov = m + i; mm[i].msg_hdr.msg_iovlen = 1; + mm[i].msg_hdr.msg_control = NULL; + mm[i].msg_hdr.msg_controllen = 0; + mm[i].msg_hdr.msg_flags = 0; + count++; } -- 2.37.3

Because UDP is connectionless we don't have an in-built end-of-stream signal for our connectivity tests. We work around this by explicitly adding an end marker to our sample data and killing the listening end once it is seen. However, socat has some built-in options - null-eof and shut-null - which can be used to signal the end of stream with a zero-length UDP packet. Use these to simplify how the UDP tests are implemented. Signed-off-by: David Gibson --- test/passt/udp | 23 +++++++------- test/passt_in_ns/udp | 73 ++++++++++++++++++++++---------------------- test/pasta/udp | 31 +++++++++---------- 3 files changed, 62 insertions(+), 65 deletions(-) diff --git a/test/passt/udp b/test/passt/udp index 0253a86..7d444b8 100644 --- a/test/passt/udp +++ b/test/passt/udp @@ -11,42 +11,41 @@ # Copyright (c) 2021 Red Hat GmbH # Author: Stefano Brivio -gtools socat tee grep cat ip jq md5sum cut -htools printf dd socat tee grep cat ip jq md5sum cut +gtools socat ip jq md5sum cut +htools dd socat jq md5sum cut test UDP/IPv4: host to guest set TEMP __STATEDIR__/data -set SC_PID __STATEDIR__/socat.pid -guestb (socat -u UDP4-LISTEN:10001 STDOUT & echo $! > sc.pid) | tee test.bin | (grep -qm1 "END_OF_TEST" && kill $(cat sc.pid)) +guestb socat -u UDP4-LISTEN:10001,null-eof OPEN:test.bin,create,trunc sleep 1 -host dd if=/dev/urandom bs=1k count=5 > __TEMP__ && printf "\nEND_OF_TEST\n" >> __TEMP__ -host socat -u OPEN:__TEMP__ UDP4:127.0.0.1:10001 +host dd if=/dev/urandom bs=1k count=5 > __TEMP__ +host socat -u OPEN:__TEMP__ UDP4:127.0.0.1:10001,shut-null guestw hout HOST_MD5 md5sum __TEMP__ | cut -d' ' -f1 gout GUEST_MD5 md5sum test.bin | cut -d' ' -f1 check [ "__GUEST_MD5__" = "__HOST_MD5__" ] test UDP/IPv4: guest to host -hostb (socat -u UDP4-LISTEN:10003,bind=127.0.0.1 STDOUT & echo $! > __SC_PID__) | tee __TEMP__ | (grep -qm1 "END_OF_TEST" && kill $(cat __SC_PID__)) +hostb socat -u UDP4-LISTEN:10003,bind=127.0.0.1,null-eof OPEN:__TEMP__,create,trunc gout GW ip -j -4 route show|jq -rM '.[] | select(.dst == "default").gateway' -guest socat -u OPEN:test.bin UDP4:__GW__:10003 +guest socat -u OPEN:test.bin UDP4:__GW__:10003,shut-null hostw hout HOST_MD5 md5sum __TEMP__ | cut -d' ' -f1 check [ "__GUEST_MD5__" = "__HOST_MD5__" ] test UDP/IPv6: host to guest -guestb (socat -u UDP6-LISTEN:10001 STDOUT & echo $! > sc.pid) | tee test.bin | (grep -qm1 "END_OF_TEST" && kill $(cat sc.pid)) +guestb socat -u UDP6-LISTEN:10001,null-eof OPEN:test.bin,create,trunc sleep 1 -host socat -u OPEN:__TEMP__ UDP6:[::1]:10001 +host socat -u OPEN:__TEMP__ UDP6:[::1]:10001,shut-null guestw gout GUEST_MD5 md5sum test.bin | cut -d' ' -f1 check [ "__GUEST_MD5__" = "__HOST_MD5__" ] test UDP/IPv6: guest to host -hostb (socat -u UDP6-LISTEN:10003,bind=[::1] STDOUT & echo $! > __SC_PID__) | tee __TEMP__ | (grep -qm1 "END_OF_TEST" && kill $(cat __SC_PID__)) +hostb socat -u UDP6-LISTEN:10003,bind=[::1],null-eof OPEN:__TEMP__,create,trunc gout GW6 ip -j -6 route show|jq -rM '.[] | select(.dst == "default").gateway' gout IFNAME ip -j link show | jq -rM '.[] | select(.link_type == "ether").ifname' -guest socat -u OPEN:test.bin UDP6:[__GW6__%__IFNAME__]:10003 +guest socat -u OPEN:test.bin UDP6:[__GW6__%__IFNAME__]:10003,shut-null hostw hout HOST_MD5 md5sum __TEMP__ | cut -d' ' -f1 check [ "__GUEST_MD5__" = "__HOST_MD5__" ] diff --git a/test/passt_in_ns/udp b/test/passt_in_ns/udp index 3b1e521..5f01cbf 100644 --- a/test/passt_in_ns/udp +++ b/test/passt_in_ns/udp @@ -11,17 +11,16 @@ # Copyright (c) 2021 Red Hat GmbH # Author: Stefano Brivio -gtools socat tee grep cat ip jq md5sum cut -nstools socat tee grep cat ip jq md5sum cut -htools printf dd socat tee grep cat ip jq md5sum cut +gtools socat ip jq md5sum cut +nstools socat ip jq md5sum cut +htools dd socat ip jq md5sum cut test UDP/IPv4: host to guest set TEMP __STATEDIR__/data -set SC_PID __STATEDIR__/socat.pid -guestb (socat -u UDP4-LISTEN:10001 STDOUT & echo $! > sc.pid) | tee test.bin | (grep -qm1 "END_OF_TEST" && kill $(cat sc.pid)) +guestb socat -u UDP4-LISTEN:10001,null-eof OPEN:test.bin,create,trunc sleep 1 -host dd if=/dev/urandom bs=1k count=5 > __TEMP__ && printf "\nEND_OF_TEST\n" >> __TEMP__ -host socat -u OPEN:__TEMP__ UDP4:127.0.0.1:10001 +host dd if=/dev/urandom bs=1k count=5 > __TEMP__ +host socat -u OPEN:__TEMP__ UDP4:127.0.0.1:10001,shut-null guestw hout MD5 md5sum __TEMP__ | cut -d' ' -f1 gout GUEST_MD5 md5sum test.bin | cut -d' ' -f1 @@ -29,114 +28,114 @@ check [ "__GUEST_MD5__" = "__MD5__" ] test UDP/IPv4: host to ns set TEMP_NS __STATEDIR__/data_ns -nsb (socat -u UDP4-LISTEN:10002 STDOUT & echo $! > __SC_PID__) | tee __TEMP_NS__ | (grep -qm1 "END_OF_TEST" && kill $(cat __SC_PID__)) -host socat -u OPEN:__TEMP__ UDP4:127.0.0.1:10002 +nsb socat -u UDP4-LISTEN:10002,null-eof OPEN:__TEMP_NS__,create,trunc +host socat -u OPEN:__TEMP__ UDP4:127.0.0.1:10002,shut-null nsw nsout NS_MD5 md5sum __TEMP_NS__ | cut -d' ' -f1 check [ "__NS_MD5__" = "__MD5__" ] test UDP/IPv4: guest to host -hostb (socat -u UDP4-LISTEN:10003 STDOUT & echo $! > __SC_PID__) | tee __TEMP__ | (grep -qm1 "END_OF_TEST" && kill $(cat __SC_PID__)) +hostb socat -u UDP4-LISTEN:10003,null-eof OPEN:__TEMP__,create,trunc gout GW ip -j -4 route show|jq -rM '.[] | select(.dst == "default").gateway' -guest socat -u OPEN:test.bin UDP4:__GW__:10003 +guest socat -u OPEN:test.bin UDP4:__GW__:10003,shut-null hostw hout HOST_MD5 md5sum __TEMP__ | cut -d' ' -f1 check [ "__HOST_MD5__" = "__MD5__" ] test UDP/IPv4: guest to ns -nsb (socat -u UDP4-LISTEN:10002 STDOUT & echo $! > __SC_PID__) | tee __TEMP_NS__ | (grep -qm1 "END_OF_TEST" && kill $(cat __SC_PID__)) -guest socat -u OPEN:test.bin UDP4:__GW__:10002 +nsb socat -u UDP4-LISTEN:10002,null-eof OPEN:__TEMP_NS__,create,trunc +guest socat -u OPEN:test.bin UDP4:__GW__:10002,shut-null nsw hout HOST_MD5 md5sum __TEMP__ | cut -d' ' -f1 check [ "__HOST_MD5__" = "__MD5__" ] test UDP/IPv4: ns to host (recvmmsg/sendmmsg) sleep 1 -hostb (socat -u UDP4-LISTEN:10003 STDOUT & echo $! > __SC_PID__) | tee __TEMP__ | (grep -qm1 "END_OF_TEST" && kill $(cat __SC_PID__)) -ns socat -u OPEN:__TEMP_NS__ UDP4:127.0.0.1:10003 +hostb socat -u UDP4-LISTEN:10003,null-eof OPEN:__TEMP__,create,trunc +ns socat -u OPEN:__TEMP_NS__ UDP4:127.0.0.1:10003,shut-null hostw hout HOST_MD5 md5sum __TEMP__ | cut -d' ' -f1 check [ "__HOST_MD5__" = "__MD5__" ] test UDP/IPv4: ns to host (via tap) -hostb (socat -u UDP4-LISTEN:10003 STDOUT & echo $! > __SC_PID__) | tee __TEMP__ | (grep -qm1 "END_OF_TEST" && kill $(cat __SC_PID__)) -ns socat -u OPEN:__TEMP_NS__ UDP4:__GW__:10003 +hostb socat -u UDP4-LISTEN:10003,null-eof OPEN:__TEMP__,create,trunc +ns socat -u OPEN:__TEMP_NS__ UDP4:__GW__:10003,shut-null hostw hout HOST_MD5 md5sum __TEMP__ | cut -d' ' -f1 check [ "__HOST_MD5__" = "__MD5__" ] test UDP/IPv4: ns to guest (using loopback address) -guestb (socat -u UDP4-LISTEN:10001 STDOUT & echo $! > sc.pid) | tee test.bin | (grep -qm1 "END_OF_TEST" && kill $(cat sc.pid)) -ns socat -u OPEN:__TEMP_NS__ UDP4:127.0.0.1:10001 +guestb socat -u UDP4-LISTEN:10001,null-eof OPEN:test.bin,create,trunc +ns socat -u OPEN:__TEMP_NS__ UDP4:127.0.0.1:10001,shut-null guestw gout GUEST_MD5 md5sum test.bin | cut -d' ' -f1 check [ "__GUEST_MD5__" = "__MD5__" ] test UDP/IPv4: ns to guest (using namespace address) -guestb (socat -u UDP4-LISTEN:10001 STDOUT & echo $! > sc.pid) | tee test.bin | (grep -qm1 "END_OF_TEST" && kill $(cat sc.pid)) +guestb socat -u UDP4-LISTEN:10001,null-eof OPEN:test.bin,create,trunc nsout IFNAME ip -j link show | jq -rM '.[] | select(.link_type == "ether").ifname' nsout ADDR ip -j -4 addr show|jq -rM '.[] | select(.ifname == "__IFNAME__").addr_info[0].local' -ns socat -u OPEN:__TEMP_NS__ UDP4:__ADDR__:10001 +ns socat -u OPEN:__TEMP_NS__ UDP4:__ADDR__:10001,shut-null guestw gout GUEST_MD5 md5sum test.bin | cut -d' ' -f1 check [ "__GUEST_MD5__" = "__MD5__" ] test UDP/IPv6: host to guest -guestb (socat -u UDP6-LISTEN:10001 STDOUT & echo $! > sc.pid) | tee test.bin | (grep -qm1 "END_OF_TEST" && kill $(cat sc.pid)) -host socat -u OPEN:__TEMP__ UDP6:[::1]:10001 +guestb socat -u UDP6-LISTEN:10001,null-eof OPEN:test.bin,create,trunc +host socat -u OPEN:__TEMP__ UDP6:[::1]:10001,shut-null guestw gout GUEST_MD5 md5sum test.bin | cut -d' ' -f1 check [ "__GUEST_MD5__" = "__MD5__" ] test UDP/IPv6: host to ns -nsb (socat -u UDP6-LISTEN:10002 STDOUT & echo $! > __SC_PID__) | tee __TEMP_NS__ | (grep -qm1 "END_OF_TEST" && kill $(cat __SC_PID__)) -host socat -u OPEN:__TEMP__ UDP6:[::1]:10002 +nsb socat -u UDP6-LISTEN:10002,null-eof OPEN:__TEMP_NS__,create,trunc +host socat -u OPEN:__TEMP__ UDP6:[::1]:10002,shut-null nsw nsout NS_MD5 md5sum __TEMP_NS__ | cut -d' ' -f1 check [ "__NS_MD5__" = "__MD5__" ] test UDP/IPv6: guest to host -hostb (socat -u UDP6-LISTEN:10003 STDOUT & echo $! > __SC_PID__) | tee __TEMP__ | (grep -qm1 "END_OF_TEST" && kill $(cat __SC_PID__)) +hostb socat -u UDP6-LISTEN:10003,null-eof OPEN:__TEMP__,create,trunc gout GW6 ip -j -6 route show|jq -rM '.[] | select(.dst == "default").gateway' gout IFNAME ip -j link show | jq -rM '.[] | select(.link_type == "ether").ifname' -guest socat -u OPEN:test.bin UDP6:[__GW6__%__IFNAME__]:10003 +guest socat -u OPEN:test.bin UDP6:[__GW6__%__IFNAME__]:10003,shut-null hostw hout HOST_MD5 md5sum __TEMP__ | cut -d' ' -f1 check [ "__HOST_MD5__" = "__MD5__" ] test UDP/IPv6: guest to ns -nsb (socat -u UDP6-LISTEN:10002 STDOUT & echo $! > __SC_PID__) | tee __TEMP_NS__ | (grep -qm1 "END_OF_TEST" && kill $(cat __SC_PID__)) -guest socat -u OPEN:test.bin UDP6:[__GW6__%__IFNAME__]:10002 +nsb socat -u UDP6-LISTEN:10002,null-eof OPEN:__TEMP_NS__,create,trunc +guest socat -u OPEN:test.bin UDP6:[__GW6__%__IFNAME__]:10002,shut-null nsw hout HOST_MD5 md5sum __TEMP__ | cut -d' ' -f1 check [ "__HOST_MD5__" = "__MD5__" ] test UDP/IPv6: ns to host (recvmmsg/sendmmsg) -hostb (socat -u UDP6-LISTEN:10003 STDOUT & echo $! > __SC_PID__) | tee __TEMP__ | (grep -qm1 "END_OF_TEST" && kill $(cat __SC_PID__)) -ns socat -u OPEN:__TEMP_NS__ UDP6:[::1]:10003 +hostb socat -u UDP6-LISTEN:10003,null-eof OPEN:__TEMP__,create,trunc +ns socat -u OPEN:__TEMP_NS__ UDP6:[::1]:10003,shut-null hostw hout HOST_MD5 md5sum __TEMP__ | cut -d' ' -f1 check [ "__HOST_MD5__" = "__MD5__" ] test UDP/IPv6: ns to host (via tap) -hostb (socat -u UDP6-LISTEN:10003 STDOUT & echo $! > __SC_PID__) | tee __TEMP__ | (grep -qm1 "END_OF_TEST" && kill $(cat __SC_PID__)) +hostb socat -u UDP6-LISTEN:10003,null-eof OPEN:__TEMP__,create,trunc nsout IFNAME ip -j link show | jq -rM '.[] | select(.link_type == "ether").ifname' -ns socat -u OPEN:__TEMP_NS__ UDP6:[__GW6__%__IFNAME__]:10003 +ns socat -u OPEN:__TEMP_NS__ UDP6:[__GW6__%__IFNAME__]:10003,shut-null hostw hout HOST_MD5 md5sum __TEMP__ | cut -d' ' -f1 check [ "__HOST_MD5__" = "__MD5__" ] test UDP/IPv6: ns to guest (using loopback address) -guestb (socat -u UDP6-LISTEN:10001 STDOUT & echo $! > sc.pid) | tee test.bin | (grep -qm1 "END_OF_TEST" && kill $(cat sc.pid)) -ns socat -u OPEN:__TEMP_NS__ UDP6:[::1]:10001 +guestb socat -u UDP6-LISTEN:10001,null-eof OPEN:test.bin,create,trunc +ns socat -u OPEN:__TEMP_NS__ UDP6:[::1]:10001,shut-null guestw gout GUEST_MD5 md5sum test.bin | cut -d' ' -f1 check [ "__GUEST_MD5__" = "__MD5__" ] test UDP/IPv6: ns to guest (using namespace address) -guestb (socat -u UDP6-LISTEN:10001 STDOUT & echo $! > sc.pid) | tee test.bin | (grep -qm1 "END_OF_TEST" && kill $(cat sc.pid)) +guestb socat -u UDP6-LISTEN:10001,null-eof OPEN:test.bin,create,trunc nsout ADDR6 ip -j -6 addr show|jq -rM '.[] | select(.ifname == "__IFNAME__").addr_info[0].local' -ns socat -u OPEN:__TEMP_NS__ UDP6:[__ADDR6__]:10001 +ns socat -u OPEN:__TEMP_NS__ UDP6:[__ADDR6__]:10001,shut-null guestw gout GUEST_MD5 md5sum test.bin | cut -d' ' -f1 check [ "__GUEST_MD5__" = "__MD5__" ] diff --git a/test/pasta/udp b/test/pasta/udp index 74148e3..fc6bf0a 100644 --- a/test/pasta/udp +++ b/test/pasta/udp @@ -11,59 +11,58 @@ # Copyright (c) 2021 Red Hat GmbH # Author: Stefano Brivio -nstools socat tee grep cat ip jq md5sum cut -htools printf dd socat tee grep cat ip jq md5sum cut +nstools socat ip jq md5sum cut +htools dd socat ip jq md5sum cut test UDP/IPv4: host to ns set TEMP __STATEDIR__/data set TEMP_NS __STATEDIR__/data_ns -set SC_PID __STATEDIR__/socat.pid -nsb (socat -u UDP4-LISTEN:10002,bind=127.0.0.1 STDOUT & echo $! > __SC_PID__) | tee __TEMP_NS__ | (grep -qm1 "END_OF_TEST" && kill $(cat __SC_PID__)) -host dd if=/dev/urandom bs=1k count=5 > __TEMP__ && printf "\nEND_OF_TEST\n" >> __TEMP__ +nsb socat -u UDP4-LISTEN:10002,bind=127.0.0.1,null-eof OPEN:__TEMP_NS__,create,trunc +host dd if=/dev/urandom bs=1k count=5 > __TEMP__ -host socat OPEN:__TEMP__ UDP4:127.0.0.1:10002 +host socat OPEN:__TEMP__ UDP4:127.0.0.1:10002,shut-null nsw hout MD5 md5sum __TEMP__ | cut -d' ' -f1 nsout NS_MD5 md5sum __TEMP_NS__ | cut -d' ' -f1 check [ "__NS_MD5__" = "__MD5__" ] test UDP/IPv4: ns to host (recvmmsg/sendmmsg) -hostb (socat -u UDP4-LISTEN:10003,bind=127.0.0.1 STDOUT & echo $! > __SC_PID__) | tee __TEMP__ | (grep -qm1 "END_OF_TEST" && kill $(cat __SC_PID__)) +hostb socat -u UDP4-LISTEN:10003,bind=127.0.0.1,null-eof OPEN:__TEMP__,create,trunc sleep 1 -ns socat OPEN:__TEMP_NS__ UDP4:127.0.0.1:10003 +ns socat OPEN:__TEMP_NS__ UDP4:127.0.0.1:10003,shut-null hostw hout HOST_MD5 md5sum __TEMP__ | cut -d' ' -f1 check [ "__HOST_MD5__" = "__MD5__" ] test UDP/IPv4: ns to host (via tap) -hostb (socat -u UDP4-LISTEN:10003 STDOUT & echo $! > __SC_PID__) | tee __TEMP__ | (grep -qm1 "END_OF_TEST" && kill $(cat __SC_PID__)) +hostb socat -u UDP4-LISTEN:10003,null-eof OPEN:__TEMP__,create,trunc nsout GW ip -j -4 route show|jq -rM '.[] | select(.dst == "default").gateway' -ns socat -u OPEN:__TEMP_NS__ UDP4:__GW__:10003 +ns socat -u OPEN:__TEMP_NS__ UDP4:__GW__:10003,shut-null hostw hout HOST_MD5 md5sum __TEMP__ | cut -d' ' -f1 check [ "__HOST_MD5__" = "__MD5__" ] test UDP/IPv6: host to ns -nsb (socat -u UDP6-LISTEN:10002,bind=[::1] STDOUT & echo $! > __SC_PID__) | tee __TEMP_NS__ | (grep -qm1 "END_OF_TEST" && kill $(cat __SC_PID__)) -host socat -u OPEN:__TEMP__ UDP6:[::1]:10002 +nsb socat -u UDP6-LISTEN:10002,bind=[::1],null-eof OPEN:__TEMP_NS__,create,trunc +host socat -u OPEN:__TEMP__ UDP6:[::1]:10002,shut-null nsw hout MD5 md5sum __TEMP__ | cut -d' ' -f1 nsout NS_MD5 md5sum __TEMP_NS__ | cut -d' ' -f1 check [ "__NS_MD5__" = "__MD5__" ] test UDP/IPv6: ns to host (recvmmsg/sendmmsg) -hostb (socat -u UDP6-LISTEN:10003,bind=[::1] STDOUT & echo $! > __SC_PID__) | tee __TEMP__ | (grep -qm1 "END_OF_TEST" && kill $(cat __SC_PID__)) +hostb socat -u UDP6-LISTEN:10003,bind=[::1],null-eof OPEN:__TEMP__,create,trunc sleep 1 -ns socat -u OPEN:__TEMP_NS__ UDP6:[::1]:10003 +ns socat -u OPEN:__TEMP_NS__ UDP6:[::1]:10003,shut-null hostw hout HOST_MD5 md5sum __TEMP__ | cut -d' ' -f1 check [ "__HOST_MD5__" = "__MD5__" ] test UDP/IPv6: ns to host (via tap) -hostb (socat -u UDP6-LISTEN:10003 STDOUT & echo $! > __SC_PID__) | tee __TEMP__ | (grep -qm1 "END_OF_TEST" && kill $(cat __SC_PID__)) +hostb socat -u UDP6-LISTEN:10003,null-eof OPEN:__TEMP__,create,trunc nsout GW6 ip -j -6 route show|jq -rM '.[] | select(.dst == "default").gateway' nsout IFNAME ip -j link show | jq -rM '.[] | select(.link_type == "ether").ifname' -ns socat -u OPEN:__TEMP_NS__ UDP6:[__GW6__%__IFNAME__]:10003 +ns socat -u OPEN:__TEMP_NS__ UDP6:[__GW6__%__IFNAME__]:10003,shut-null hostw hout HOST_MD5 md5sum __TEMP__ | cut -d' ' -f1 check [ "__HOST_MD5__" = "__MD5__" ] -- 2.37.3