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Commit de755a85 authored by Stefano Brivio's avatar Stefano Brivio Committed by David S. Miller
Browse files

selftests: pmtu: Introduce list_flush_ipv4_exception test case 



This test checks that route exceptions can be successfully listed and
flushed using ip -6 route {list,flush} cache.

v7: No changes

v6:
  - Merge this patch into series including fix, as it's also targeted
    for net-next
  - Drop left-over print of 'ip route list cache | wc -l'

Signed-off-by: default avatarStefano Brivio <sbrivio@redhat.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 40cb35d5

tools/testing/selftests/net/pmtu.sh

+60 −0
Original line number Diff line number Diff line
@@ -112,6 +112,10 @@ 
# - cleanup_ipv6_exception

#	Same as above, but use IPv6 transport from A to B

#

# - list_flush_ipv4_exception

#	Using the same topology as in pmtu_ipv4, create exceptions, and check

#	they are shown when listing exception caches, gone after flushing them

#

# - list_flush_ipv6_exception

#	Using the same topology as in pmtu_ipv6, create exceptions, and check

#	they are shown when listing exception caches, gone after flushing them
@@ -156,6 +160,7 @@ tests=" 
	pmtu_vti6_link_change_mtu	vti6: MTU changes on link changes	0

	cleanup_ipv4_exception		ipv4: cleanup of cached exceptions	1

	cleanup_ipv6_exception		ipv6: cleanup of cached exceptions	1

	list_flush_ipv4_exception	ipv4: list and flush cached exceptions	1

	list_flush_ipv6_exception	ipv6: list and flush cached exceptions	1"



NS_A="ns-A"
@@ -1207,6 +1212,61 @@ run_test_nh() { 
	USE_NH=no

}



test_list_flush_ipv4_exception() {

	setup namespaces routing || return 2

	trace "${ns_a}"  veth_A-R1    "${ns_r1}" veth_R1-A \

	      "${ns_r1}" veth_R1-B    "${ns_b}"  veth_B-R1 \

	      "${ns_a}"  veth_A-R2    "${ns_r2}" veth_R2-A \

	      "${ns_r2}" veth_R2-B    "${ns_b}"  veth_B-R2



	dst_prefix1="${prefix4}.${b_r1}."

	dst2="${prefix4}.${b_r2}.1"



	# Set up initial MTU values

	mtu "${ns_a}"  veth_A-R1 2000

	mtu "${ns_r1}" veth_R1-A 2000

	mtu "${ns_r1}" veth_R1-B 1500

	mtu "${ns_b}"  veth_B-R1 1500



	mtu "${ns_a}"  veth_A-R2 2000

	mtu "${ns_r2}" veth_R2-A 2000

	mtu "${ns_r2}" veth_R2-B 1500

	mtu "${ns_b}"  veth_B-R2 1500



	fail=0



	# Add 100 addresses for veth endpoint on B reached by default A route

	for i in $(seq 100 199); do

		run_cmd ${ns_b} ip addr add "${dst_prefix1}${i}" dev veth_B-R1

	done



	# Create 100 cached route exceptions for path via R1, one via R2. Note

	# that with IPv4 we need to actually cause a route lookup that matches

	# the exception caused by ICMP, in order to actually have a cached

	# route, so we need to ping each destination twice

	for i in $(seq 100 199); do

		run_cmd ${ns_a} ping -q -M want -i 0.1 -c 2 -s 1800 "${dst_prefix1}${i}"

	done

	run_cmd ${ns_a} ping -q -M want -i 0.1 -c 2 -s 1800 "${dst2}"



	# Each exception is printed as two lines

	if [ "$(${ns_a} ip route list cache | wc -l)" -ne 202 ]; then

		err "  can't list cached exceptions"

		fail=1

	fi



	run_cmd ${ns_a} ip route flush cache

	pmtu1="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst_prefix}1)"

	pmtu2="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst_prefix}2)"

	if [ -n "${pmtu1}" ] || [ -n "${pmtu2}" ] || \

	   [ -n "$(${ns_a} ip route list cache)" ]; then

		err "  can't flush cached exceptions"

		fail=1

	fi



	return ${fail}

}



test_list_flush_ipv6_exception() {

	setup namespaces routing || return 2

	trace "${ns_a}"  veth_A-R1    "${ns_r1}" veth_R1-A \