On Wed, Dec 07, 2016 at 11:14:12PM +0800, Peng Tao wrote:
> Otherwise we'll leave the packets queued until releasing vsock device.
> E.g., if guest is slow to start up, resulting ETIMEDOUT on connect, guest
> will get the connect requests from failed host sockets.
>
> Reviewed-by: Stefan Hajnoczi <stefa...@redhat.com>
> Signed-off-by: Peng Tao <bergw...@gmail.com>
> ---
> include/linux/virtio_vsock.h | 7 +++++++
> net/vmw_vsock/af_vsock.c | 7 +++++++
> net/vmw_vsock/virtio_transport_common.c | 7 -------
> 3 files changed, 14 insertions(+), 7 deletions(-)
>
> diff --git a/include/linux/virtio_vsock.h b/include/linux/virtio_vsock.h
> index b92e88d..ff6850a 100644
> --- a/include/linux/virtio_vsock.h
> +++ b/include/linux/virtio_vsock.h
> @@ -156,4 +156,11 @@ void virtio_transport_inc_tx_pkt(struct
> virtio_vsock_sock *vvs, struct virtio_vs
> u32 virtio_transport_get_credit(struct virtio_vsock_sock *vvs, u32 wanted);
> void virtio_transport_put_credit(struct virtio_vsock_sock *vvs, u32 credit);
>
> +static inline const struct virtio_transport *virtio_transport_get_ops(void)
> +{
> + const struct vsock_transport *t = vsock_core_get_transport();
> +
> + return container_of(t, struct virtio_transport, transport);
> +}
> +
> #endif /* _LINUX_VIRTIO_VSOCK_H */
> diff --git a/net/vmw_vsock/af_vsock.c b/net/vmw_vsock/af_vsock.c
> index 8a398b3..ebb50d6 100644
> --- a/net/vmw_vsock/af_vsock.c
> +++ b/net/vmw_vsock/af_vsock.c
> @@ -104,6 +104,7 @@
> #include <linux/unistd.h>
> #include <linux/wait.h>
> #include <linux/workqueue.h>
> +#include <linux/virtio_vsock.h>
> #include <net/sock.h>
> #include <net/af_vsock.h>
>
> @@ -1105,6 +1106,7 @@ static void vsock_connect_timeout(struct work_struct
> *work)
> {
> struct sock *sk;
> struct vsock_sock *vsk;
> + int cancel = 0;
>
> vsk = container_of(work, struct vsock_sock, dwork.work);
> sk = sk_vsock(vsk);
> @@ -1115,8 +1117,11 @@ static void vsock_connect_timeout(struct work_struct
> *work)
> sk->sk_state = SS_UNCONNECTED;
> sk->sk_err = ETIMEDOUT;
> sk->sk_error_report(sk);
> + cancel = 1;
> }
> release_sock(sk);
> + if (cancel)
> + virtio_transport_get_ops()->cancel_pkt(vsk);
This doesn't work with the VMCI transport. Remember af_vsock.c is
common code shared by all transports.
You need to add a struct vsock_transport->cancel_pkt() callback instead
os a struct virtio_transport->cancel_pkt() callback. And you need to
handle the case where cancel_pkt == NULL if you don't implement it for
VMCI.
>
> sock_put(sk);
> }
> @@ -1223,11 +1228,13 @@ static int vsock_stream_connect(struct socket *sock,
> struct sockaddr *addr,
> err = sock_intr_errno(timeout);
> sk->sk_state = SS_UNCONNECTED;
> sock->state = SS_UNCONNECTED;
> + virtio_transport_get_ops()->cancel_pkt(vsk);
> goto out_wait;
> } else if (timeout == 0) {
> err = -ETIMEDOUT;
> sk->sk_state = SS_UNCONNECTED;
> sock->state = SS_UNCONNECTED;
> + virtio_transport_get_ops()->cancel_pkt(vsk);
> goto out_wait;
> }
>
> diff --git a/net/vmw_vsock/virtio_transport_common.c
> b/net/vmw_vsock/virtio_transport_common.c
> index cc1eeb5..72c5dff 100644
> --- a/net/vmw_vsock/virtio_transport_common.c
> +++ b/net/vmw_vsock/virtio_transport_common.c
> @@ -25,13 +25,6 @@
> /* How long to wait for graceful shutdown of a connection */
> #define VSOCK_CLOSE_TIMEOUT (8 * HZ)
>
> -static const struct virtio_transport *virtio_transport_get_ops(void)
> -{
> - const struct vsock_transport *t = vsock_core_get_transport();
> -
> - return container_of(t, struct virtio_transport, transport);
> -}
> -
> struct virtio_vsock_pkt *
> virtio_transport_alloc_pkt(struct virtio_vsock_pkt_info *info,
> size_t len,
> --
> 2.7.4
>
> --
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