tools/testing/selftests/net/big_tcp.sh

Source file repositories/reference/linux-study-clean/tools/testing/selftests/net/big_tcp.sh

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/net/big_tcp.sh
Extension
.sh
Size
5617 bytes
Lines
183
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: tools
Status
atlas-only

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

#!/bin/bash
# SPDX-License-Identifier: GPL-2.0
#
# Testing For IPv4 and IPv6 BIG TCP.
# TOPO: CLIENT_NS (link0)<--->(link1) ROUTER_NS (link2)<--->(link3) SERVER_NS

CLIENT_NS=$(mktemp -u client-XXXXXXXX)
CLIENT_IP4="198.51.100.1"
CLIENT_IP6="2001:db8:1::1"

SERVER_NS=$(mktemp -u server-XXXXXXXX)
SERVER_IP4="203.0.113.1"
SERVER_IP6="2001:db8:2::1"

ROUTER_NS=$(mktemp -u router-XXXXXXXX)
SERVER_GW4="203.0.113.2"
CLIENT_GW4="198.51.100.2"
SERVER_GW6="2001:db8:2::2"
CLIENT_GW6="2001:db8:1::2"

MAX_SIZE=128000
CHK_SIZE=65535

# Kselftest framework requirement - SKIP code is 4.
ksft_skip=4

setup() {
	ip netns add $CLIENT_NS
	ip netns add $SERVER_NS
	ip netns add $ROUTER_NS
	ip -net $ROUTER_NS link add link1 type veth peer name link0 netns $CLIENT_NS
	ip -net $ROUTER_NS link add link2 type veth peer name link3 netns $SERVER_NS

	ip -net $CLIENT_NS link set link0 up
	ip -net $CLIENT_NS link set link0 mtu 1442
	ip -net $CLIENT_NS addr add $CLIENT_IP4/24 dev link0
	ip -net $CLIENT_NS addr add $CLIENT_IP6/64 dev link0 nodad
	ip -net $CLIENT_NS route add $SERVER_IP4 dev link0 via $CLIENT_GW4
	ip -net $CLIENT_NS route add $SERVER_IP6 dev link0 via $CLIENT_GW6
	ip -net $CLIENT_NS link set dev link0 \
		gro_ipv4_max_size $MAX_SIZE gso_ipv4_max_size $MAX_SIZE
	ip -net $CLIENT_NS link set dev link0 \
		gro_max_size $MAX_SIZE gso_max_size $MAX_SIZE
	ip net exec $CLIENT_NS sysctl -wq net.ipv4.tcp_window_scaling=10

	ip -net $ROUTER_NS link set link1 up
	ip -net $ROUTER_NS link set link2 up
	ip -net $ROUTER_NS addr add $CLIENT_GW4/24 dev link1
	ip -net $ROUTER_NS addr add $CLIENT_GW6/64 dev link1 nodad
	ip -net $ROUTER_NS addr add $SERVER_GW4/24 dev link2
	ip -net $ROUTER_NS addr add $SERVER_GW6/64 dev link2 nodad
	ip -net $ROUTER_NS link set dev link1 \
		gro_ipv4_max_size $MAX_SIZE gso_ipv4_max_size $MAX_SIZE
	ip -net $ROUTER_NS link set dev link2 \
		gro_ipv4_max_size $MAX_SIZE gso_ipv4_max_size $MAX_SIZE
	ip -net $ROUTER_NS link set dev link1 \
		gro_max_size $MAX_SIZE gso_max_size $MAX_SIZE
	ip -net $ROUTER_NS link set dev link2 \
		gro_max_size $MAX_SIZE gso_max_size $MAX_SIZE
	# test for nf_ct_skb_network_trim in nf_conntrack_ovs used by TC ct action.
	ip net exec $ROUTER_NS tc qdisc add dev link1 ingress
	ip net exec $ROUTER_NS tc filter add dev link1 ingress \
		proto ip flower ip_proto tcp action ct
	ip net exec $ROUTER_NS tc filter add dev link1 ingress \
		proto ipv6 flower ip_proto tcp action ct
	ip net exec $ROUTER_NS sysctl -wq net.ipv4.ip_forward=1
	ip net exec $ROUTER_NS sysctl -wq net.ipv6.conf.all.forwarding=1

	ip -net $SERVER_NS link set link3 up
	ip -net $SERVER_NS addr add $SERVER_IP4/24 dev link3

Annotation

Implementation Notes