From ae255e523c256cf0708f1c16cb946ff96340a800 Mon Sep 17 00:00:00 2001
From: Paolo Bonzini
Date: Thu, 8 Sep 2011 14:28:59 +0200
Subject: nbd: switch to asynchronous operation

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 nbd.c | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'nbd.c')

diff --git a/nbd.c b/nbd.c
index de880fe3c6..ff701d3dc8 100644
--- a/nbd.c
+++ b/nbd.c
@@ -81,6 +81,14 @@ size_t nbd_wr_sync(int fd, void *buffer, size_t size, bool do_read)
 {
     size_t offset = 0;
 
+    if (qemu_in_coroutine()) {
+        if (do_read) {
+            return qemu_co_recv(fd, buffer, size);
+        } else {
+            return qemu_co_send(fd, buffer, size);
+        }
+    }
+
     while (offset < size) {
         ssize_t len;
 
-- 
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