bridge tests: test changing the bridge MTU
Changing the bridge MTU will now also change all of the member interface MTUs. Test this. Reviewed by: donner Sponsored by: Rubicon Communications, LLC ("Netgate") Differential Revision: https://reviews.freebsd.org/D31289
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@ -517,6 +517,73 @@ gif_cleanup()
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vnet_cleanup
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}
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atf_test_case "mtu" "cleanup"
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mtu_head()
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{
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atf_set descr 'Bridge MTU changes'
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atf_set require.user root
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}
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get_mtu()
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{
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intf=$1
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ifconfig ${intf} ether | awk '$5 == "mtu" { print $6 }'
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}
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check_mtu()
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{
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intf=$1
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expected=$2
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mtu=$(get_mtu $intf)
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if [ $mtu -ne $expected ];
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then
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atf_fail "Expected MTU of $expected on $intf but found $mtu"
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fi
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}
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mtu_body()
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{
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vnet_init
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epair=$(vnet_mkepair)
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gif=$(ifconfig gif create)
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echo ${gif} >> created_interfaces.lst
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bridge=$(vnet_mkbridge)
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atf_check -s exit:0 \
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ifconfig ${bridge} addm ${epair}a
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# Can't add an interface with an MTU mismatch
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atf_check -s exit:1 -e ignore \
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ifconfig ${bridge} addm ${gif}
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ifconfig ${gif} mtu 1500
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atf_check -s exit:0 \
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ifconfig ${bridge} addm ${gif}
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# Changing MTU changes it for all member interfaces
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atf_check -s exit:0 \
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ifconfig ${bridge} mtu 2000
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check_mtu ${bridge} 2000
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check_mtu ${gif} 2000
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check_mtu ${epair}a 2000
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# Rejected MTUs mean none of the MTUs change
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atf_check -s exit:1 -e ignore \
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ifconfig ${bridge} mtu 9000
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check_mtu ${bridge} 2000
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check_mtu ${gif} 2000
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check_mtu ${epair}a 2000
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}
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mtu_cleanup()
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{
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vnet_cleanup
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}
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atf_init_test_cases()
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{
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atf_add_test_case "bridge_transmit_ipv4_unicast"
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@ -529,4 +596,5 @@ atf_init_test_cases()
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atf_add_test_case "mac_conflict"
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atf_add_test_case "stp_validation"
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atf_add_test_case "gif"
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atf_add_test_case "mtu"
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}
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