rbd: Fix to cleanly reject -drive without pool or image

[mirror_qemu.git] / block / nbd-client.c

diff --git a/block/nbd-client.c b/block/nbd-client.c
index 10fcc9e81d93f9011fe72aef2de98b3cc80af95f..1e2952fdae6f4dd8474a4419a88cf7426eda7f6c 100644 (file)
--- a/block/nbd-client.c
+++ b/block/nbd-client.c
@@ -33,17 +33,15 @@
 #define HANDLE_TO_INDEX(bs, handle) ((handle) ^ ((uint64_t)(intptr_t)bs))
 #define INDEX_TO_HANDLE(bs, index)  ((index)  ^ ((uint64_t)(intptr_t)bs))
 
-static void nbd_recv_coroutines_enter_all(BlockDriverState *bs)
+static void nbd_recv_coroutines_enter_all(NBDClientSession *s)
 {
-    NBDClientSession *s = nbd_get_client_session(bs);
     int i;
 
     for (i = 0; i < MAX_NBD_REQUESTS; i++) {
         if (s->recv_coroutine[i]) {
-            qemu_coroutine_enter(s->recv_coroutine[i]);
+            aio_co_wake(s->recv_coroutine[i]);
         }
     }
-    BDRV_POLL_WHILE(bs, s->read_reply_co);
 }
 
 static void nbd_teardown_connection(BlockDriverState *bs)
@@ -58,7 +56,7 @@ static void nbd_teardown_connection(BlockDriverState *bs)
     qio_channel_shutdown(client->ioc,
                          QIO_CHANNEL_SHUTDOWN_BOTH,
                          NULL);
-    nbd_recv_coroutines_enter_all(bs);
+    BDRV_POLL_WHILE(bs, client->read_reply_co);
 
     nbd_client_detach_aio_context(bs);
     object_unref(OBJECT(client->sioc));
@@ -76,7 +74,7 @@ static coroutine_fn void nbd_read_reply_entry(void *opaque)
     for (;;) {
         assert(s->reply.handle == 0);
         ret = nbd_receive_reply(s->ioc, &s->reply);
-        if (ret < 0) {
+        if (ret <= 0) {
             break;
         }
 
@@ -103,6 +101,8 @@ static coroutine_fn void nbd_read_reply_entry(void *opaque)
         aio_co_wake(s->recv_coroutine[i]);
         qemu_coroutine_yield();
     }
+
+    nbd_recv_coroutines_enter_all(s);
     s->read_reply_co = NULL;
 }
 
@@ -182,7 +182,7 @@ static void nbd_coroutine_start(NBDClientSession *s,
     /* Poor man semaphore.  The free_sema is locked when no other request
      * can be accepted, and unlocked after receiving one reply.  */
     if (s->in_flight == MAX_NBD_REQUESTS) {
-        qemu_co_queue_wait(&s->free_sema);
+        qemu_co_queue_wait(&s->free_sema, NULL);
         assert(s->in_flight < MAX_NBD_REQUESTS);
     }
     s->in_flight++;