target/spdknvmf: Add max_queue_depth configuration parameter

User can specify max_queue_depth parameter used in spdk
when creating rdma transport.

Change-Id: I5dc6024907e5fdb0ff0e852eed8e80792d363697
Signed-off-by: Pawel Kaminski <pawelx.kaminski@intel.com>

cinder/volume/targets/spdknvmf.py

@@ -34,6 +34,10 @@ spdk_opts = [
     cfg.StrOpt('spdk_rpc_password',
                help='The NVMe target remote configuration password.',
                secret=True),
+    cfg.IntOpt('spdk_max_queue_depth',
+               default=64,
+               min=1, max=128,
+               help='Queue depth for rdma transport.'),
 ]
 CONF = cfg.CONF
 CONF.register_opts(spdk_opts, group=configuration.SHARED_CONF_GROUP)
@@ -58,6 +62,8 @@ class SpdkNvmf(nvmeof.NVMeOF):
         try:
             params = {
                 'trtype': 'rdma',
+                'max_queue_depth':
+                self.configuration.spdk_max_queue_depth
             }
             self._rpc_call('nvmf_create_transport', params)
         except Exception:

releasenotes/notes/spdk-add-config-parameter-39a880ec22956fd2.yaml

@@ -0,0 +1,5 @@
+---
+upgrade:
+  - |
+    New config option spdk_max_queue_depth is added for SPDK NVMe-oF target.
+    It allows users to specify max queu depth.