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>
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@ -1210,6 +1210,8 @@ free_cdev:
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free_port:
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kfree(port);
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fail:
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/* The host might want to notify management sw about port add failure */
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send_control_msg(port, VIRTIO_CONSOLE_PORT_READY, 0);
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return err;
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}
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@ -1488,6 +1490,9 @@ free_chrdev:
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free:
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kfree(portdev);
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fail:
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/* The host might want to notify mgmt sw about device add failure */
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__send_control_msg(portdev, VIRTIO_CONSOLE_BAD_ID,
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VIRTIO_CONSOLE_DEVICE_READY, 0);
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return err;
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}
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@ -14,6 +14,8 @@
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#define VIRTIO_CONSOLE_F_SIZE 0 /* Does host provide console size? */
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#define VIRTIO_CONSOLE_F_MULTIPORT 1 /* Does host provide multiple ports? */
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#define VIRTIO_CONSOLE_BAD_ID (~(u32)0)
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struct virtio_console_config {
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/* colums of the screens */
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__u16 cols;
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@ -42,6 +44,7 @@ struct virtio_console_control {
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#define VIRTIO_CONSOLE_PORT_OPEN 3
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#define VIRTIO_CONSOLE_PORT_NAME 4
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#define VIRTIO_CONSOLE_PORT_REMOVE 5
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#define VIRTIO_CONSOLE_DEVICE_READY 6
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#ifdef __KERNEL__
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int __init virtio_cons_early_init(int (*put_chars)(u32, const char *, int));
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