nbd/001: wait for the device node to show up before running parted

The parted call can happen before the device is settled and thus fail.
Currently this happens very rarely for me (about 1 in 500 runs), but
a pending change to freeze the queues for updating the limits will make
it much more likely to hit.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Shin'ichiro Kawasaki <shinichiro.kawasaki@wdc.com>

diff --git a/tests/nbd/001 b/tests/nbd/001
index 9427f8ed60cfdaa7376b17609f958522fba67be7..5fd0d432ad96c85279a41f7abe12f4756b82b119 100755 (executable)
--- a/tests/nbd/001
+++ b/tests/nbd/001
@@ -18,6 +18,8 @@ test() {
        echo "Running ${TEST_NAME}"
        _start_nbd_server
        nbd-client -L -N export localhost /dev/nbd0 >> "$FULL" 2>&1
+       udevadm settle
+
        parted -s /dev/nbd0 print 2>> "$FULL" | grep 'Disk /dev/nbd0'
        lsblk --raw --noheadings /dev/nbd0