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tests: Correct determination of host interface name in tests

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By default, passt itself attaches to the first host interface with a
default route.  However, when determining the host interface name the tests
implicitly select the *last* host interface: they use a jq expression which
will list all interfaces with default routes, but the way output detection
works in the scripts, it will only pick up the last line.

If there are multiple interfaces with default routes on the host, and they
each have a different address, this can cause spurious test failures.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
David Gibson 2022-07-15 15:21:40 +10:00 committed by Stefano Brivio
parent 4b2e018d70
commit 3eaf9f5320
2 changed files with 2 additions and 2 deletions
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2
test/dhcp/passt
View File

@ -16,7 +16,7 @@ htools ip jq sed tr head
test Interface name
gout IFNAME ip -j link show | jq -rM '.[] | select(.link_type == "ether").ifname'
hout HOST_IFNAME ip -j -4 route show|jq -rM '.[] | select(.dst == "default").dev'
hout HOST_IFNAME ip -j -4 route show|jq -rM '[.[] | select(.dst == "default").dev] | .[0]'
check [ -n "__IFNAME__" ]
test DHCP: address

2
test/two_guests/basic
View File

@ -18,7 +18,7 @@ htools ip jq md5sum cut
test Interface names
g1out IFNAME1 ip -j link show | jq -rM '.[] | select(.link_type == "ether").ifname'
g2out IFNAME2 ip -j link show | jq -rM '.[] | select(.link_type == "ether").ifname'
hout HOST_IFNAME ip -j -4 route show|jq -rM '.[] | select(.dst == "default").dev'
hout HOST_IFNAME ip -j -4 route show|jq -rM '[.[] | select(.dst == "default").dev] | .[0]'
check [ -n "__IFNAME1__" ]
check [ -n "__IFNAME2__" ]