test/vhost/initiator: fix discover_bdevs usage

discover_bdevs previously took a port number for the RPC service, but
after commit 6bef902ca5 ("rpc: add default UNIX domain socket listen
address"), running rpc.py with just a -p (port) parameter doesn't have
the expected effect, since the default server_addr is now a UNIX domain
socket path, and the port is ignored.

Change discover_bdevs to accept a socket path instead of a port number
to fix the issue for the vhost/initiator test; no other callers use the
disover_bdevs rpc_port argument, so this is the only instance that needs
to change.

Change-Id: I4e290f175ccc79caa3c4ef76c062641b9fe489a8
Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>
Reviewed-on: https://review.gerrithub.io/388283
Tested-by: SPDK Automated Test System <sys_sgsw@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>

scripts/autotest_common.sh

@@ -403,7 +403,7 @@ function discover_bdevs()
 {
 	local rootdir=$1
 	local config_file=$2
-	local rpc_port=$3
+	local rpc_server=$3
 
 	if [ ! -e $config_file ]; then
 		echo "Invalid Configuration File: $config_file"
@@ -419,10 +419,10 @@ function discover_bdevs()
 	done
 
 	# Get all of the bdevs
-	if [ -z "$rpc_port" ]; then
+	if [ -z "$rpc_server" ]; then
 		$rootdir/scripts/rpc.py get_bdevs
 	else
-		$rootdir/scripts/rpc.py -p $rpc_port get_bdevs
+		$rootdir/scripts/rpc.py -s "$rpc_server" get_bdevs
 	fi
 
 	# Shut down the bdev service

test/vhost/initiator/bdev.conf.in

@@ -4,7 +4,7 @@
 
 [Rpc]
   Enable Yes
-  Listen 127.0.0.1:5261
+  Listen /var/tmp/spdk2.sock
 
 [Ioat]
   Disable Yes

test/vhost/initiator/blockdev.sh

@@ -96,7 +96,7 @@ for bdev in $bdevs; do
         timing_exit bounds
 
         timing_enter bdev_svc
-        bdevs=$(discover_bdevs $rootdir $testdir/bdev.conf 5261 | jq -r '.[] | select(.claimed == false)')
+        bdevs=$(discover_bdevs $rootdir $testdir/bdev.conf /var/tmp/spdk2.sock | jq -r '.[] | select(.claimed == false)')
         timing_exit bdev_svc
 
         if [ -d /usr/src/fio ]; then