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[Qemu-devel] [PATCH 1/3] chardev: prevent extra connection attempt in tc

From: Yury Kotov
Subject: [Qemu-devel] [PATCH 1/3] chardev: prevent extra connection attempt in tcp_chr_machine_done_hook
Date: Thu, 16 Aug 2018 18:32:41 +0300

Usually chardev connects to specified address during the initialization.
But if reconnect_time is specified then connection will be postponed until
machine done event.

Thus if reconnect is specified and some device forces connection during
initialization, tcp_chr_machine_done_hook will do useless connection attempt.

So add a check to prevent it.

Signed-off-by: Yury Kotov <address@hidden>
Signed-off-by: Evgeny Yakovlev <address@hidden>
 chardev/char-socket.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/chardev/char-socket.c b/chardev/char-socket.c
index efbad6e..116dcc4 100644
--- a/chardev/char-socket.c
+++ b/chardev/char-socket.c
@@ -1165,7 +1165,10 @@ static int tcp_chr_machine_done_hook(Chardev *chr)
     SocketChardev *s = SOCKET_CHARDEV(chr);
-    if (s->reconnect_time) {
+    /* It's possible that connection was established during the device
+     * initialization. So check if the socket is already connected to
+     * prevent extra connection attempt. */
+    if (!s->connected && s->reconnect_time) {

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