xref: /linux/tools/testing/selftests/net/io_uring_zerocopy_tx.sh (revision 06d07429858317ded2db7986113a9e0129cd599b) 
1#!/bin/bash
2#
3# Send data between two processes across namespaces
4# Run twice: once without and once with zerocopy
5
6set -e
7
8readonly DEV="veth0"
9readonly DEV_MTU=65535
10readonly BIN_TX="./io_uring_zerocopy_tx"
11readonly BIN_RX="./msg_zerocopy"
12
13readonly RAND="$(mktemp -u XXXXXX)"
14readonly NSPREFIX="ns-${RAND}"
15readonly NS1="${NSPREFIX}1"
16readonly NS2="${NSPREFIX}2"
17
18readonly SADDR4='192.168.1.1'
19readonly DADDR4='192.168.1.2'
20readonly SADDR6='fd::1'
21readonly DADDR6='fd::2'
22
23readonly path_sysctl_mem="net.core.optmem_max"
24
25# No arguments: automated test
26if [[ "$#" -eq "0" ]]; then
27	IPs=( "4" "6" )
28
29	for IP in "${IPs[@]}"; do
30		for mode in $(seq 1 3); do
31			$0 "$IP" udp -m "$mode" -t 1 -n 32
32			$0 "$IP" tcp -m "$mode" -t 1 -n 1
33		done
34	done
35
36	echo "OK. All tests passed"
37	exit 0
38fi
39
40# Argument parsing
41if [[ "$#" -lt "2" ]]; then
42	echo "Usage: $0 [4|6] [tcp|udp|raw|raw_hdrincl|packet|packet_dgram] <args>"
43	exit 1
44fi
45
46readonly IP="$1"
47shift
48readonly TXMODE="$1"
49shift
50readonly EXTRA_ARGS="$@"
51
52# Argument parsing: configure addresses
53if [[ "${IP}" == "4" ]]; then
54	readonly SADDR="${SADDR4}"
55	readonly DADDR="${DADDR4}"
56elif [[ "${IP}" == "6" ]]; then
57	readonly SADDR="${SADDR6}"
58	readonly DADDR="${DADDR6}"
59else
60	echo "Invalid IP version ${IP}"
61	exit 1
62fi
63
64# Argument parsing: select receive mode
65#
66# This differs from send mode for
67# - packet:	use raw recv, because packet receives skb clones
68# - raw_hdrinc: use raw recv, because hdrincl is a tx-only option
69case "${TXMODE}" in
70'packet' | 'packet_dgram' | 'raw_hdrincl')
71	RXMODE='raw'
72	;;
73*)
74	RXMODE="${TXMODE}"
75	;;
76esac
77
78# Start of state changes: install cleanup handler
79
80cleanup() {
81	ip netns del "${NS2}"
82	ip netns del "${NS1}"
83}
84
85trap cleanup EXIT
86
87# Create virtual ethernet pair between network namespaces
88ip netns add "${NS1}"
89ip netns add "${NS2}"
90
91# Configure system settings
92ip netns exec "${NS1}" sysctl -w -q "${path_sysctl_mem}=1000000"
93ip netns exec "${NS2}" sysctl -w -q "${path_sysctl_mem}=1000000"
94
95ip link add "${DEV}" mtu "${DEV_MTU}" netns "${NS1}" type veth \
96  peer name "${DEV}" mtu "${DEV_MTU}" netns "${NS2}"
97
98# Bring the devices up
99ip -netns "${NS1}" link set "${DEV}" up
100ip -netns "${NS2}" link set "${DEV}" up
101
102# Set fixed MAC addresses on the devices
103ip -netns "${NS1}" link set dev "${DEV}" address 02:02:02:02:02:02
104ip -netns "${NS2}" link set dev "${DEV}" address 06:06:06:06:06:06
105
106# Add fixed IP addresses to the devices
107ip -netns "${NS1}" addr add 192.168.1.1/24 dev "${DEV}"
108ip -netns "${NS2}" addr add 192.168.1.2/24 dev "${DEV}"
109ip -netns "${NS1}" addr add       fd::1/64 dev "${DEV}" nodad
110ip -netns "${NS2}" addr add       fd::2/64 dev "${DEV}" nodad
111
112# Optionally disable sg or csum offload to test edge cases
113# ip netns exec "${NS1}" ethtool -K "${DEV}" sg off
114
115do_test() {
116	local readonly ARGS="$1"
117
118	echo "ipv${IP} ${TXMODE} ${ARGS}"
119	ip netns exec "${NS2}" "${BIN_RX}" "-${IP}" -t 2 -C 2 -S "${SADDR}" -D "${DADDR}" -r "${RXMODE}" &
120	sleep 0.2
121	ip netns exec "${NS1}" "${BIN_TX}" "-${IP}" -t 1 -D "${DADDR}" ${ARGS} "${TXMODE}"
122	wait
123}
124
125do_test "${EXTRA_ARGS}"
126echo ok
127