121 lines
2.9 KiB
Bash
Executable File
121 lines
2.9 KiB
Bash
Executable File
#!/bin/bash
|
|
#
|
|
# Send data between two processes across namespaces
|
|
# Run twice: once without and once with zerocopy
|
|
|
|
set -e
|
|
|
|
readonly DEV="veth0"
|
|
readonly DEV_MTU=65535
|
|
readonly BIN="./msg_zerocopy"
|
|
|
|
readonly RAND="$(mktemp -u XXXXXX)"
|
|
readonly NSPREFIX="ns-${RAND}"
|
|
readonly NS1="${NSPREFIX}1"
|
|
readonly NS2="${NSPREFIX}2"
|
|
|
|
readonly SADDR4='192.168.1.1'
|
|
readonly DADDR4='192.168.1.2'
|
|
readonly SADDR6='fd::1'
|
|
readonly DADDR6='fd::2'
|
|
|
|
readonly path_sysctl_mem="net.core.optmem_max"
|
|
|
|
# No arguments: automated test
|
|
if [[ "$#" -eq "0" ]]; then
|
|
$0 4 tcp -t 1
|
|
$0 6 tcp -t 1
|
|
echo "OK. All tests passed"
|
|
exit 0
|
|
fi
|
|
|
|
# Argument parsing
|
|
if [[ "$#" -lt "2" ]]; then
|
|
echo "Usage: $0 [4|6] [tcp|udp|raw|raw_hdrincl|packet|packet_dgram] <args>"
|
|
exit 1
|
|
fi
|
|
|
|
readonly IP="$1"
|
|
shift
|
|
readonly TXMODE="$1"
|
|
shift
|
|
readonly EXTRA_ARGS="$@"
|
|
|
|
# Argument parsing: configure addresses
|
|
if [[ "${IP}" == "4" ]]; then
|
|
readonly SADDR="${SADDR4}"
|
|
readonly DADDR="${DADDR4}"
|
|
elif [[ "${IP}" == "6" ]]; then
|
|
readonly SADDR="${SADDR6}"
|
|
readonly DADDR="${DADDR6}"
|
|
else
|
|
echo "Invalid IP version ${IP}"
|
|
exit 1
|
|
fi
|
|
|
|
# Argument parsing: select receive mode
|
|
#
|
|
# This differs from send mode for
|
|
# - packet: use raw recv, because packet receives skb clones
|
|
# - raw_hdrinc: use raw recv, because hdrincl is a tx-only option
|
|
case "${TXMODE}" in
|
|
'packet' | 'packet_dgram' | 'raw_hdrincl')
|
|
RXMODE='raw'
|
|
;;
|
|
*)
|
|
RXMODE="${TXMODE}"
|
|
;;
|
|
esac
|
|
|
|
# Start of state changes: install cleanup handler
|
|
save_sysctl_mem="$(sysctl -n ${path_sysctl_mem})"
|
|
|
|
cleanup() {
|
|
ip netns del "${NS2}"
|
|
ip netns del "${NS1}"
|
|
sysctl -w -q "${path_sysctl_mem}=${save_sysctl_mem}"
|
|
}
|
|
|
|
trap cleanup EXIT
|
|
|
|
# Configure system settings
|
|
sysctl -w -q "${path_sysctl_mem}=1000000"
|
|
|
|
# Create virtual ethernet pair between network namespaces
|
|
ip netns add "${NS1}"
|
|
ip netns add "${NS2}"
|
|
|
|
ip link add "${DEV}" mtu "${DEV_MTU}" netns "${NS1}" type veth \
|
|
peer name "${DEV}" mtu "${DEV_MTU}" netns "${NS2}"
|
|
|
|
# Bring the devices up
|
|
ip -netns "${NS1}" link set "${DEV}" up
|
|
ip -netns "${NS2}" link set "${DEV}" up
|
|
|
|
# Set fixed MAC addresses on the devices
|
|
ip -netns "${NS1}" link set dev "${DEV}" address 02:02:02:02:02:02
|
|
ip -netns "${NS2}" link set dev "${DEV}" address 06:06:06:06:06:06
|
|
|
|
# Add fixed IP addresses to the devices
|
|
ip -netns "${NS1}" addr add 192.168.1.1/24 dev "${DEV}"
|
|
ip -netns "${NS2}" addr add 192.168.1.2/24 dev "${DEV}"
|
|
ip -netns "${NS1}" addr add fd::1/64 dev "${DEV}" nodad
|
|
ip -netns "${NS2}" addr add fd::2/64 dev "${DEV}" nodad
|
|
|
|
# Optionally disable sg or csum offload to test edge cases
|
|
# ip netns exec "${NS1}" ethtool -K "${DEV}" sg off
|
|
|
|
do_test() {
|
|
local readonly ARGS="$1"
|
|
|
|
echo "ipv${IP} ${TXMODE} ${ARGS}"
|
|
ip netns exec "${NS2}" "${BIN}" "-${IP}" -i "${DEV}" -t 2 -C 2 -S "${SADDR}" -D "${DADDR}" ${ARGS} -r "${RXMODE}" &
|
|
sleep 0.2
|
|
ip netns exec "${NS1}" "${BIN}" "-${IP}" -i "${DEV}" -t 1 -C 3 -S "${SADDR}" -D "${DADDR}" ${ARGS} "${TXMODE}"
|
|
wait
|
|
}
|
|
|
|
do_test "${EXTRA_ARGS}"
|
|
do_test "-z ${EXTRA_ARGS}"
|
|
echo ok
|