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