qemu-char: Automatically do fe_open / fe_close on qemu_chr_add_handlers

Most frontends can't really determine if the guest actually has the frontend
side open. So lets automatically generate fe_open / fe_close as soon as a
frontend becomes ready (as signalled by calling qemu_chr_add_handlers) /
becomes non ready (as signalled by setting all handlers to NULL).

And allow frontends which can actually determine if the guest is listening to
opt-out of this.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Message-id: 1364292483-16564-5-git-send-email-hdegoede@redhat.com
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/hw/virtio-console.c b/hw/virtio-console.c
index e2d1c58d9d..2f7c3dfe9e 100644
--- a/hw/virtio-console.c
+++ b/hw/virtio-console.c
@@ -131,6 +131,7 @@ static int virtconsole_initfn(VirtIOSerialPort *port)
     }
 
     if (vcon->chr) {
+        vcon->chr->explicit_fe_open = 1;
         qemu_chr_add_handlers(vcon->chr, chr_can_read, chr_read, chr_event,
                               vcon);
     }