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-rw-r--r--block/nbd.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/block/nbd.c b/block/nbd.c
index 3bfcf4d97c..6085ab1d2c 100644
--- a/block/nbd.c
+++ b/block/nbd.c
@@ -81,12 +81,18 @@ typedef struct BDRVNBDState {
     NBDClientRequest requests[MAX_NBD_REQUESTS];
     QEMUTimer *reconnect_delay_timer;
 
+    /* Protects sending data on the socket.  */
     CoMutex send_mutex;
+
+    /*
+     * Protects receiving reply headers from the socket, as well as the
+     * fields reply and requests[].receiving
+     */
     CoMutex receive_mutex;
+    NBDReply reply;
 
     QEMUTimer *open_timer;
 
-    NBDReply reply;
     BlockDriverState *bs;
 
     /* Connection parameters */