3 # Send data between two processes across namespaces
4 # Run twice: once without and once with zerocopy
10 readonly BIN_TX="./io_uring_zerocopy_tx"
11 readonly BIN_RX="./msg_zerocopy"
13 readonly RAND="$(mktemp -u XXXXXX)"
14 readonly NSPREFIX="ns-${RAND}"
15 readonly NS1="${NSPREFIX}1"
16 readonly NS2="${NSPREFIX}2"
18 readonly SADDR4='192.168.1.1'
19 readonly DADDR4='192.168.1.2'
20 readonly SADDR6='fd::1'
21 readonly DADDR6='fd::2'
23 readonly path_sysctl_mem="net.core.optmem_max"
25 # No arguments: automated test
26 if [[ "$#" -eq "0" ]]; then
28 protocols=( "tcp" "udp" )
30 for IP in "${IPs[@]}"; do
31 for proto in "${protocols[@]}"; do
32 for mode in $(seq 1 3); do
33 $0 "$IP" "$proto" -m "$mode" -t 1 -n 32
34 $0 "$IP" "$proto" -m "$mode" -t 1 -n 32 -f
35 $0 "$IP" "$proto" -m "$mode" -t 1 -n 32 -c -f
40 echo "OK. All tests passed"
45 if [[ "$#" -lt "2" ]]; then
46 echo "Usage: $0 [4|6] [tcp|udp|raw|raw_hdrincl|packet|packet_dgram] <args>"
54 readonly EXTRA_ARGS="$@"
56 # Argument parsing: configure addresses
57 if [[ "${IP}" == "4" ]]; then
58 readonly SADDR="${SADDR4}"
59 readonly DADDR="${DADDR4}"
60 elif [[ "${IP}" == "6" ]]; then
61 readonly SADDR="${SADDR6}"
62 readonly DADDR="${DADDR6}"
64 echo "Invalid IP version ${IP}"
68 # Argument parsing: select receive mode
70 # This differs from send mode for
71 # - packet: use raw recv, because packet receives skb clones
72 # - raw_hdrinc: use raw recv, because hdrincl is a tx-only option
74 'packet' | 'packet_dgram' | 'raw_hdrincl')
82 # Start of state changes: install cleanup handler
83 save_sysctl_mem="$(sysctl -n ${path_sysctl_mem})"
88 sysctl -w -q "${path_sysctl_mem}=${save_sysctl_mem}"
93 # Configure system settings
94 sysctl -w -q "${path_sysctl_mem}=1000000"
96 # Create virtual ethernet pair between network namespaces
100 ip link add "${DEV}" mtu "${DEV_MTU}" netns "${NS1}" type veth \
101 peer name "${DEV}" mtu "${DEV_MTU}" netns "${NS2}"
103 # Bring the devices up
104 ip -netns "${NS1}" link set "${DEV}" up
105 ip -netns "${NS2}" link set "${DEV}" up
107 # Set fixed MAC addresses on the devices
108 ip -netns "${NS1}" link set dev "${DEV}" address 02:02:02:02:02:02
109 ip -netns "${NS2}" link set dev "${DEV}" address 06:06:06:06:06:06
111 # Add fixed IP addresses to the devices
112 ip -netns "${NS1}" addr add 192.168.1.1/24 dev "${DEV}"
113 ip -netns "${NS2}" addr add 192.168.1.2/24 dev "${DEV}"
114 ip -netns "${NS1}" addr add fd::1/64 dev "${DEV}" nodad
115 ip -netns "${NS2}" addr add fd::2/64 dev "${DEV}" nodad
117 # Optionally disable sg or csum offload to test edge cases
118 # ip netns exec "${NS1}" ethtool -K "${DEV}" sg off
121 local readonly ARGS="$1"
123 echo "ipv${IP} ${TXMODE} ${ARGS}"
124 ip netns exec "${NS2}" "${BIN_RX}" "-${IP}" -t 2 -C 2 -S "${SADDR}" -D "${DADDR}" -r "${RXMODE}" &
126 ip netns exec "${NS1}" "${BIN_TX}" "-${IP}" -t 1 -D "${DADDR}" ${ARGS} "${TXMODE}"
130 do_test "${EXTRA_ARGS}"