virtio: console: Let host know of port or device add failures

The host may want to know and let management apps notify of port or
device add failures. Send a control message saying the device or port is
not ready in this case.

Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

1 files changed, 3 insertions, 0 deletions

diff --git a/include/linux/virtio_console.h b/include/linux/virtio_console.h
index ae4f039515b4..015736113c25 100644
--- a/include/linux/virtio_console.h
+++ b/include/linux/virtio_console.h
@@ -14,6 +14,8 @@
 #define VIRTIO_CONSOLE_F_SIZE   0       /* Does host provide console size? */
 #define VIRTIO_CONSOLE_F_MULTIPORT 1    /* Does host provide multiple ports? */
 
+#define VIRTIO_CONSOLE_BAD_ID           (~(u32)0)
+
 struct virtio_console_config {
         /* colums of the screens */
         __u16 cols;
@@ -42,6 +44,7 @@ struct virtio_console_control {
 #define VIRTIO_CONSOLE_PORT_OPEN        3
 #define VIRTIO_CONSOLE_PORT_NAME        4
 #define VIRTIO_CONSOLE_PORT_REMOVE      5
+#define VIRTIO_CONSOLE_DEVICE_READY     6
 
 #ifdef __KERNEL__
 int __init virtio_cons_early_init(int (*put_chars)(u32, const char *, int));