chore: add env variable to allow qpair async connect

Add NVME_QPAIR_CONNECT_ASYNC env variable, which defaults to false;
If enabled then the qpair connection is async.

csi/src/node.rs

@@ -534,6 +534,7 @@ impl node_server::Node for Node {
         request: Request<NodeUnstageVolumeRequest>,
     ) -> Result<Response<NodeUnstageVolumeResponse>, Status> {
         let msg = request.into_inner();
+        trace!("node_unstage_volume {:?}", msg);
 
         if msg.volume_id.is_empty() {
             return Err(failure!(

mayastor/src/bdev/nvmx/channel.rs

@@ -132,6 +132,7 @@ impl IoQpair {
         opts.io_queue_requests =
             max(opts.io_queue_requests, default_opts.io_queue_requests);
         opts.create_only = true;
+        opts.async_mode = default_opts.async_mode;
 
         opts
     }

mayastor/src/subsys/config/opts.rs

@@ -243,6 +243,8 @@ pub struct NvmeBdevOpts {
     pub delay_cmd_submit: bool,
     /// attempts per I/O in bdev layer before I/O fails
     pub bdev_retry_count: i32,
+    /// enable creation of submission and completion queues asynchronously.
+    pub async_mode: bool,
 }
 
 impl GetOpts for NvmeBdevOpts {
@@ -284,6 +286,7 @@ impl Default for NvmeBdevOpts {
             io_queue_requests: 0,
             delay_cmd_submit: true,
             bdev_retry_count: try_from_env("NVME_BDEV_RETRY_COUNT", 0),
+            async_mode: try_from_env("NVME_QPAIR_CONNECT_ASYNC", false),
         }
     }
 }
@@ -305,6 +308,7 @@ impl From<spdk_bdev_nvme_opts> for NvmeBdevOpts {
             io_queue_requests: o.io_queue_requests,
             delay_cmd_submit: o.delay_cmd_submit,
             bdev_retry_count: o.bdev_retry_count,
+            async_mode: NvmeBdevOpts::default().async_mode,
         }
     }
 }

scripts/release.sh

@@ -170,6 +170,7 @@ if [ -n "$UPLOAD" ] && [ -z "$SKIP_PUBLISH" ]; then
   fi
   if [ -n "$alias_tag" ]; then
     for img in $UPLOAD; do
+      echo "Uploading $img:$alias_tag to registry ..."
       $DOCKER tag $img:$TAG $img:$alias_tag
       $DOCKER push $img:$alias_tag
     done