3 # Send data between two processes across namespaces
4 # Run twice: once without and once with zerocopy
10 readonly BIN="./msg_zerocopy"
12 readonly RAND="$(mktemp -u XXXXXX)"
13 readonly NSPREFIX="ns-${RAND}"
14 readonly NS1="${NSPREFIX}1"
15 readonly NS2="${NSPREFIX}2"
17 readonly SADDR4='192.168.1.1'
18 readonly DADDR4='192.168.1.2'
19 readonly SADDR6='fd::1'
20 readonly DADDR6='fd::2'
22 readonly path_sysctl_mem="net.core.optmem_max"
24 # No arguments: automated test
25 if [[ "$#" -eq "0" ]]; then
30 echo "OK. All tests passed"
35 if [[ "$#" -lt "2" ]]; then
36 echo "Usage: $0 [4|6] [tcp|udp|raw|raw_hdrincl|packet|packet_dgram] <args>"
44 readonly EXTRA_ARGS="$@"
46 # Argument parsing: configure addresses
47 if [[ "${IP}" == "4" ]]; then
48 readonly SADDR="${SADDR4}"
49 readonly DADDR="${DADDR4}"
50 elif [[ "${IP}" == "6" ]]; then
51 readonly SADDR="${SADDR6}"
52 readonly DADDR="${DADDR6}"
54 echo "Invalid IP version ${IP}"
58 # Argument parsing: select receive mode
60 # This differs from send mode for
61 # - packet: use raw recv, because packet receives skb clones
62 # - raw_hdrinc: use raw recv, because hdrincl is a tx-only option
64 'packet' | 'packet_dgram' | 'raw_hdrincl')
72 # Start of state changes: install cleanup handler
73 save_sysctl_mem="$(sysctl -n ${path_sysctl_mem})"
78 sysctl -w -q "${path_sysctl_mem}=${save_sysctl_mem}"
83 # Configure system settings
84 sysctl -w -q "${path_sysctl_mem}=1000000"
86 # Create virtual ethernet pair between network namespaces
90 ip link add "${DEV}" mtu "${DEV_MTU}" netns "${NS1}" type veth \
91 peer name "${DEV}" mtu "${DEV_MTU}" netns "${NS2}"
93 # Bring the devices up
94 ip -netns "${NS1}" link set "${DEV}" up
95 ip -netns "${NS2}" link set "${DEV}" up
97 # Set fixed MAC addresses on the devices
98 ip -netns "${NS1}" link set dev "${DEV}" address 02:02:02:02:02:02
99 ip -netns "${NS2}" link set dev "${DEV}" address 06:06:06:06:06:06
101 # Add fixed IP addresses to the devices
102 ip -netns "${NS1}" addr add 192.168.1.1/24 dev "${DEV}"
103 ip -netns "${NS2}" addr add 192.168.1.2/24 dev "${DEV}"
104 ip -netns "${NS1}" addr add fd::1/64 dev "${DEV}" nodad
105 ip -netns "${NS2}" addr add fd::2/64 dev "${DEV}" nodad
107 # Optionally disable sg or csum offload to test edge cases
108 # ip netns exec "${NS1}" ethtool -K "${DEV}" sg off
111 local readonly ARGS="$1"
113 echo "ipv${IP} ${TXMODE} ${ARGS}"
114 ip netns exec "${NS2}" "${BIN}" "-${IP}" -i "${DEV}" -t 2 -C 2 -S "${SADDR}" -D "${DADDR}" ${ARGS} -r "${RXMODE}" &
116 ip netns exec "${NS1}" "${BIN}" "-${IP}" -i "${DEV}" -t 1 -C 3 -S "${SADDR}" -D "${DADDR}" ${ARGS} "${TXMODE}"
120 do_test "${EXTRA_ARGS}"
121 do_test "-z ${EXTRA_ARGS}"