#!/bin/bash
# SPDX-License-Identifier: GPL-2.0
#
# Topology for Bond mode 1,5,6 testing
#
#  +-------------------------------------+
#  |                bond0                |
#  |                  +                  |  Server
#  |      eth0        | eth1   eth2      |  192.0.2.1/24
#  |        +-------------------+        |  2001:db8::1/24
#  |        |         |         |        |
#  +-------------------------------------+
#           |         |         |
#  +-------------------------------------+
#  |        |         |         |        |
#  |    +---+---------+---------+---+    |  Gateway
#  |    |            br0            |    |  192.0.2.254/24
#  |    +-------------+-------------+    |  2001:db8::254/24
#  |                  |                  |
#  +-------------------------------------+
#                     |
#  +-------------------------------------+
#  |                  |                  |  Client
#  |                  +                  |  192.0.2.10/24
#  |                eth0                 |  2001:db8::10/24
#  +-------------------------------------+

s_ns="s-$(mktemp -u XXXXXX)"
c_ns="c-$(mktemp -u XXXXXX)"
g_ns="g-$(mktemp -u XXXXXX)"
s_ip4="192.0.2.1"
c_ip4="192.0.2.10"
g_ip4="192.0.2.254"
s_ip6="2001:db8::1"
c_ip6="2001:db8::10"
g_ip6="2001:db8::254"

gateway_create()
{
	ip netns add ${g_ns}
	ip -n ${g_ns} link add br0 type bridge
	ip -n ${g_ns} link set br0 up
	ip -n ${g_ns} addr add ${g_ip4}/24 dev br0
	ip -n ${g_ns} addr add ${g_ip6}/24 dev br0
}

gateway_destroy()
{
	ip -n ${g_ns} link del br0
	ip netns del ${g_ns}
}

server_create()
{
	ip netns add ${s_ns}
	ip -n ${s_ns} link add bond0 type bond mode active-backup miimon 100

	for i in $(seq 0 2); do
		ip -n ${s_ns} link add eth${i} type veth peer name s${i} netns ${g_ns}

		ip -n ${g_ns} link set s${i} up
		ip -n ${g_ns} link set s${i} master br0
		ip -n ${s_ns} link set eth${i} master bond0

		tc -n ${g_ns} qdisc add dev s${i} clsact
	done

	ip -n ${s_ns} link set bond0 up
	ip -n ${s_ns} addr add ${s_ip4}/24 dev bond0
	ip -n ${s_ns} addr add ${s_ip6}/24 dev bond0
	sleep 2
}

# Reset bond with new mode and options
bond_reset()
{
	local param="$1"

	ip -n ${s_ns} link set bond0 down
	ip -n ${s_ns} link del bond0

	ip -n ${s_ns} link add bond0 type bond $param
	for i in $(seq 0 2); do
		ip -n ${s_ns} link set eth$i master bond0
	done

	ip -n ${s_ns} link set bond0 up
	ip -n ${s_ns} addr add ${s_ip4}/24 dev bond0
	ip -n ${s_ns} addr add ${s_ip6}/24 dev bond0
	sleep 2
}

server_destroy()
{
	for i in $(seq 0 2); do
		ip -n ${s_ns} link del eth${i}
	done
	ip netns del ${s_ns}
}

client_create()
{
	ip netns add ${c_ns}
	ip -n ${c_ns} link add eth0 type veth peer name c0 netns ${g_ns}

	ip -n ${g_ns} link set c0 up
	ip -n ${g_ns} link set c0 master br0

	ip -n ${c_ns} link set eth0 up
	ip -n ${c_ns} addr add ${c_ip4}/24 dev eth0
	ip -n ${c_ns} addr add ${c_ip6}/24 dev eth0
}

client_destroy()
{
	ip -n ${c_ns} link del eth0
	ip netns del ${c_ns}
}

setup_prepare()
{
	gateway_create
	server_create
	client_create
}

cleanup()
{
	pre_cleanup

	client_destroy
	server_destroy
	gateway_destroy
}

bond_check_connection()
{
	local msg=${1:-"check connection"}

	sleep 2
	ip netns exec ${s_ns} ping ${c_ip4} -c5 -i 0.1 &>/dev/null
	check_err $? "${msg}: ping failed"
	ip netns exec ${s_ns} ping6 ${c_ip6} -c5 -i 0.1 &>/dev/null
	check_err $? "${msg}: ping6 failed"
}