On Thu, Mar 8, 2018 at 8:57 PM, Dr. David Alan Gilbert (git)
<dgilb...@redhat.com> wrote:
> From: "Dr. David Alan Gilbert" <dgilb...@redhat.com>
>
> Register the UFD that comes in as the response to the 'advise' method
> with the postcopy code.
>
> Signed-off-by: Dr. David Alan Gilbert <dgilb...@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lur...@redhat.com>
> ---
> hw/virtio/vhost-user.c | 20 +++++++++++++++++++-
> 1 file changed, 19 insertions(+), 1 deletion(-)
>
> diff --git a/hw/virtio/vhost-user.c b/hw/virtio/vhost-user.c
> index 431858b219..9f74111e92 100644
> --- a/hw/virtio/vhost-user.c
> +++ b/hw/virtio/vhost-user.c
> @@ -171,6 +171,7 @@ struct vhost_user {
> CharBackend *chr;
> int slave_fd;
> NotifierWithReturn postcopy_notifier;
> + struct PostCopyFD postcopy_fd;
> };
>
> static bool ioeventfd_enabled(void)
> @@ -796,6 +797,17 @@ out:
> return ret;
> }
>
> +/*
> + * Called back from the postcopy fault thread when a fault is received on our
> + * ufd.
> + * TODO: This is Linux specific
> + */
> +static int vhost_user_postcopy_fault_handler(struct PostCopyFD *pcfd,
> + void *ufd)
> +{
> + return 0;
> +}
> +
> /*
> * Called at the start of an inbound postcopy on reception of the
> * 'advise' command.
> @@ -835,8 +847,14 @@ static int vhost_user_postcopy_advise(struct vhost_dev
> *dev, Error **errp)
> error_setg(errp, "%s: Failed to get ufd", __func__);
> return -1;
> }
> + fcntl(ufd, F_SETFL, O_NONBLOCK);
>
> - /* TODO: register ufd with userfault thread */
> + /* register ufd with userfault thread */
> + u->postcopy_fd.fd = ufd;
> + u->postcopy_fd.data = dev;
> + u->postcopy_fd.handler = vhost_user_postcopy_fault_handler;
> + u->postcopy_fd.idstr = "vhost-user"; /* Need to find unique name */
> + postcopy_register_shared_ufd(&u->postcopy_fd);
> return 0;
> }
>
> --
> 2.14.3
>
>
--
Marc-André Lureau
