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iotests: Do not rely on unavailable domains in 162 

There are some (mostly ISP-specific) name servers who will redirect
non-existing domains to special hosts. In this case, we will get a
different error message when trying to connect to such a host, which
breaks test 162.

162 needed this specific error message so it can confirm that qemu was
indeed trying to connect to the user-specified port. However, we can
also confirm this by setting up a local NBD server on exactly that port;
so we can fix the issue by doing just that.

Reported-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Max Reitz 2016-09-28 22:46:44 +02:00 committed by Kevin Wolf
parent 668b440631
commit 12ac9d9e90
2 changed files with 16 additions and 5 deletions
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19
tests/qemu-iotests/162
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@ -43,10 +43,21 @@ echo '=== NBD ==='
$QEMU_IMG info 'json:{"driver": "nbd", "host": 42}'
# And this should not treat @port as if it had not been specified
# (We cannot use localhost with an invalid port here, but we need to use a
# non-existing domain, because otherwise the error message will not contain
# the port)
$QEMU_IMG info 'json:{"driver": "nbd", "host": "does.not.exist.example.com", "port": 42}'
# (We need to set up a server here, because the error message for "Connection
# refused" does not contain the destination port)
# Launching qemu-nbd is done in a loop: We try to set up an NBD server on some
# random port and continue until success, i.e. until we have found a port that
# is not in use yet.
while true; do
port=$((RANDOM + 32768))
if $QEMU_NBD -p $port -f raw --fork null-co:// 2> /dev/null; then
break
fi
done
$QEMU_IMG info "json:{'driver': 'nbd', 'host': 'localhost', 'port': $port}" \
| grep '^image' | sed -e "s/$port/PORT/"
# This is a test for NBD's bdrv_refresh_filename() implementation: It expects
# either host or path to be set, but it must not assume that they are set to

2
tests/qemu-iotests/162.out
View File

@ -2,7 +2,7 @@ QA output created by 162
=== NBD ===
qemu-img: Could not open 'json:{"driver": "nbd", "host": 42}': Failed to connect socket: Invalid argument
qemu-img: Could not open 'json:{"driver": "nbd", "host": "does.not.exist.example.com", "port": 42}': address resolution failed for does.not.exist.example.com:42: Name or service not known
image: nbd://localhost:PORT
image: nbd+unix://?socket=42
=== SSH ===