[PATCH for-7.1 8/8] nbd: document what is protected by the CoMutexes

[Paolo Bonzini]

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 block/nbd.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/block/nbd.c b/block/nbd.c
index 8954243f50..8297da7e89 100644
--- a/block/nbd.c
+++ b/block/nbd.c
@@ -82,12 +82,18 @@ 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, requests[].receiving and requests[].reply_possible
+     */
     CoMutex receive_mutex;
+    NBDReply reply;
 
     QEMUTimer *open_timer;
 
-    NBDReply reply;
     BlockDriverState *bs;
 
     /* Connection parameters */
-- 
2.35.1