nbd: convert to use qio_channel_yield
In the client, read the reply headers from a coroutine, switching the
read side between the "read header" coroutine and the I/O coroutine that
reads the body of the reply.
In the server, if the server can read more requests it will create a new
"read request" coroutine as soon as a request has been read. Otherwise,
the new coroutine is created in nbd_request_put.
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Reviewed-by: Daniel P. Berrange <berrange@redhat.com>
Message-id: 20170213135235.12274-8-pbonzini@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
diff --git a/block/nbd-client.h b/block/nbd-client.h
index f8d6006..8cdfc92 100644
--- a/block/nbd-client.h
+++ b/block/nbd-client.h
@@ -25,7 +25,7 @@
CoMutex send_mutex;
CoQueue free_sema;
- Coroutine *send_coroutine;
+ Coroutine *read_reply_co;
int in_flight;
Coroutine *recv_coroutine[MAX_NBD_REQUESTS];
