rpc: Add test for pluggable RPCs

Signed-off-by: Maciej Szwed <maciej.szwed@intel.com>
Change-Id: I62d8672389723f09e58ed66330e364042f375145

Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/2419
Community-CI: Mellanox Build Bot
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com>

test/rpc/rpc.sh

@@ -25,14 +25,29 @@ function rpc_integrity() {
 	}
 }
 
+function rpc_plugins() {
+	time {
+		malloc=$($rpc --plugin rpc_plugin create_malloc)
+		bdevs=$($rpc bdev_get_bdevs)
+		[ "$(jq length <<< "$bdevs")" == "1" ]
+
+		$rpc --plugin rpc_plugin delete_malloc $malloc
+		bdevs=$($rpc bdev_get_bdevs)
+		[ "$(jq length <<< "$bdevs")" == "0" ]
+	}
+}
+
 $rootdir/app/spdk_tgt/spdk_tgt &
 spdk_pid=$!
 trap 'killprocess $spdk_pid; exit 1' SIGINT SIGTERM EXIT
 waitforlisten $spdk_pid
 
+export PYTHONPATH=$PWD/test/rpc/
+
 # basic integrity test
 rpc="$rootdir/scripts/rpc.py"
 run_test "rpc_integrity" rpc_integrity
+run_test "rpc_plugins" rpc_plugins
 # same test, but with rpc_cmd() instead
 rpc="rpc_cmd"
 run_test "rpc_daemon_integrity" rpc_integrity

test/rpc/rpc_plugin.py

@@ -0,0 +1,24 @@
+from rpc.client import print_json
+
+
+def malloc_create(args):
+    params = {'num_blocks': 256, 'block_size': 4096}
+    return args.client.call('bdev_malloc_create', params)
+
+
+def malloc_delete(args):
+    params = {'name': args.name}
+    return args.client.call('bdev_malloc_delete', params)
+
+
+def create_malloc(args):
+    print_json(malloc_create(args))
+
+
+def spdk_rpc_plugin_initialize(subparsers):
+    p = subparsers.add_parser('create_malloc', help='Create malloc backend')
+    p.set_defaults(func=create_malloc)
+
+    p = subparsers.add_parser('delete_malloc', help='Delete malloc backend')
+    p.add_argument('name', help='malloc bdev name')
+    p.set_defaults(func=malloc_delete)