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#!/bin/bash
set -x
die() {
printf '%s\n' "$*" >&1
exit 1
}
ARG_OP="$1"
shift
test -n "$ARG_OP" || die "specify the operation (setup, cleanup)"
test "$USER" = root || die "must run as root"
NUM_DEVS="${NUM_DEVS:-50}"
DNSMASQ_PIDFILE="/tmp/nm-test-create-many-device-setup.dnsmasq.pid"
NM_TEST_CONF="/etc/NetworkManager/conf.d/99-my-test.conf"
TEST_NETNS="T"
_dnsmasq_kill() {
pkill -F "$DNSMASQ_PIDFILE"
rm -rf "$DNSMASQ_PIDFILE"
}
_link_delete_all() {
ip link | sed -n 's/^[0-9]\+:.*\(t-[^@:]\+\)@.*/\1/p' | xargs -n 1 ip link delete
}
cleanup_base() {
ip netns delete "$TEST_NETNS"
_dnsmasq_kill
_link_delete_all
rm -rf "$NM_TEST_CONF"
rm -rf /run/NetworkManager/system-connections/c-*.nmconnection
}
cmd_cleanup() {
systemctl stop NetworkManager
cleanup_base
systemctl unmask NetworkManager-dispatcher
systemctl enable NetworkManager-dispatcher
systemctl start NetworkManager
}
cmd_setup() {
systemctl stop NetworkManager
systemctl mask NetworkManager-dispatcher
systemctl stop NetworkManager-dispatcher
cleanup_base
ip netns add "$TEST_NETNS"
ip --netns "$TEST_NETNS" link add t-br0 type bridge
ip --netns "$TEST_NETNS" link set t-br0 type bridge stp_state 0
ip --netns "$TEST_NETNS" link set t-br0 up
ip --netns "$TEST_NETNS" addr add 172.16.0.1/16 dev t-br0
ip netns exec "$TEST_NETNS" \
dnsmasq \
--conf-file=/dev/null \
--pid-file="$DNSMASQ_PIDFILE" \
--no-hosts \
--keep-in-foreground \
--bind-interfaces \
--except-interface=lo \
--clear-on-reload \
--listen-address=172.16.0.1 \
--dhcp-range=172.16.1.1,172.16.20.1,60 \
--no-ping \
&
disown
for i in `seq "$NUM_DEVS"`; do
ip --netns "$TEST_NETNS" link add t-a$i type veth peer t-b$i
ip --netns "$TEST_NETNS" link set t-a$i up
ip --netns "$TEST_NETNS" link set t-b$i up master t-br0
done
cat <<EOF > "$NM_TEST_CONF"
[main]
dhcp=internal
no-auto-default=interface-name:t-a*
[device-99-my-test]
match-device=interface-name:t-a*
managed=1
[logging]
level=INFO
[connectivity]
enabled=0
EOF
systemctl start NetworkManager
for i in `seq "$NUM_DEVS"`; do
ip --netns "$TEST_NETNS" link set t-a$i netns $$
done
for i in `seq "$NUM_DEVS"`; do
nmcli connection add save no type ethernet con-name c-a$i ifname t-a$i autoconnect no ipv4.method auto ipv6.method auto
done
}
case "$ARG_OP" in
"setup")
cmd_setup
;;
"cleanup")
cmd_cleanup
;;
*)
die "Unknown command \"$ARG_OP\""
;;
esac
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