[PULL 15/20] block/nbd: nbd_channel_error() shutdown channel unconditionally

[Eric Blake]

From: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>

Don't rely on connection being totally broken in case of -EIO. Safer
and more correct is to just shut down the channel anyway, since we
change the state and plan on reconnecting.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20210902103805.25686-2-vsementsov@virtuozzo.com>
[eblake: grammar tweaks]
Signed-off-by: Eric Blake <eblake@redhat.com>
---
 block/nbd.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/block/nbd.c b/block/nbd.c
index a66b2c282dc3..de59e76378ab 100644
--- a/block/nbd.c
+++ b/block/nbd.c
@@ -129,15 +129,16 @@ static bool nbd_client_connected(BDRVNBDState *s)

 static void nbd_channel_error(BDRVNBDState *s, int ret)
 {
+    if (nbd_client_connected(s)) {
+        qio_channel_shutdown(s->ioc, QIO_CHANNEL_SHUTDOWN_BOTH, NULL);
+    }
+
     if (ret == -EIO) {
         if (nbd_client_connected(s)) {
             s->state = s->reconnect_delay ? NBD_CLIENT_CONNECTING_WAIT :
                                             NBD_CLIENT_CONNECTING_NOWAIT;
         }
     } else {
-        if (nbd_client_connected(s)) {
-            qio_channel_shutdown(s->ioc, QIO_CHANNEL_SHUTDOWN_BOTH, NULL);
-        }
         s->state = NBD_CLIENT_QUIT;
     }
 }
-- 
2.31.1