Re: [RFC PATCH v8 16/19] vsock/loopback: enable SEQPACKET for transport

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On Tue, Apr 13, 2021 at 03:46:39PM +0300, Arseny Krasnov wrote:
This adds SEQPACKET ops for loopback transport and 'seqpacket_allow()'
callback.

Signed-off-by: Arseny Krasnov <arseny.krasnov@xxxxxxxxxxxxx>
Reviewed-by: Stefano Garzarella <sgarzare@xxxxxxxxxx>
---
net/vmw_vsock/vsock_loopback.c | 12 ++++++++++++
1 file changed, 12 insertions(+)

diff --git a/net/vmw_vsock/vsock_loopback.c b/net/vmw_vsock/vsock_loopback.c
index a45f7ffca8c5..d38ffdbecc84 100644
--- a/net/vmw_vsock/vsock_loopback.c
+++ b/net/vmw_vsock/vsock_loopback.c
@@ -63,6 +63,8 @@ static int vsock_loopback_cancel_pkt(struct vsock_sock *vsk)
	return 0;
}

+static bool vsock_loopback_seqpacket_allow(void);
+
static struct virtio_transport loopback_transport = {
	.transport = {
		.module                   = THIS_MODULE,
@@ -89,6 +91,10 @@ static struct virtio_transport loopback_transport = {
		.stream_is_active         = virtio_transport_stream_is_active,
		.stream_allow             = virtio_transport_stream_allow,

+		.seqpacket_dequeue        = virtio_transport_seqpacket_dequeue,
+		.seqpacket_enqueue        = virtio_transport_seqpacket_enqueue,
+		.seqpacket_allow          = vsock_loopback_seqpacket_allow,
+
		.notify_poll_in           = virtio_transport_notify_poll_in,
		.notify_poll_out          = virtio_transport_notify_poll_out,
		.notify_recv_init         = virtio_transport_notify_recv_init,
@@ -103,8 +109,14 @@ static struct virtio_transport loopback_transport = {
	},

	.send_pkt = vsock_loopback_send_pkt,
+	.seqpacket_allow = true
};

+static bool vsock_loopback_seqpacket_allow(void)
+{
+	return loopback_transport.seqpacket_allow;
+}

here I think we could always return true, since we will remove `.seqpacket_allow` from struct virtio_transport.

+
static void vsock_loopback_work(struct work_struct *work)
{
	struct vsock_loopback *vsock =
--
2.25.1


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