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[79.18.148.79]) by smtp.gmail.com with ESMTPSA id j22sm1873651ejt.11.2021.05.13.05.49.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 13 May 2021 05:49:14 -0700 (PDT) Date: Thu, 13 May 2021 14:49:12 +0200 From: Stefano Garzarella To: Arseny Krasnov Cc: Stefan Hajnoczi , "Michael S. Tsirkin" , Jason Wang , "David S. Miller" , Jakub Kicinski , Jorgen Hansen , Norbert Slusarek , Andra Paraschiv , Colin Ian King , kvm@vger.kernel.org, virtualization@lists.linux-foundation.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, stsp2@yandex.ru, oxffffaa@gmail.com Subject: Re: [RFC PATCH v9 14/19] virtio/vsock: enable SEQPACKET for transport Message-ID: <20210513124912.sw4rea75re7xwjdz@steredhat> References: <20210508163027.3430238-1-arseny.krasnov@kaspersky.com> <20210508163617.3432380-1-arseny.krasnov@kaspersky.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Disposition: inline In-Reply-To: <20210508163617.3432380-1-arseny.krasnov@kaspersky.com> Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org On Sat, May 08, 2021 at 07:36:14PM +0300, Arseny Krasnov wrote: >This adds >1) SEQPACKET ops for virtio transport and 'seqpacket_allow()' callback. >2) Handling of SEQPACKET bit: guest tries to negotiate it with vhost. > >Signed-off-by: Arseny Krasnov >--- > v8 -> v9: > 1) Move 'seqpacket_allow' to 'struct virtio_vsock'. > > net/vmw_vsock/virtio_transport.c | 25 +++++++++++++++++++++++++ > 1 file changed, 25 insertions(+) > >diff --git a/net/vmw_vsock/virtio_transport.c b/net/vmw_vsock/virtio_transport.c >index 2700a63ab095..f714c16af65d 100644 >--- a/net/vmw_vsock/virtio_transport.c >+++ b/net/vmw_vsock/virtio_transport.c >@@ -62,6 +62,7 @@ struct virtio_vsock { > struct virtio_vsock_event event_list[8]; > > u32 guest_cid; >+ bool seqpacket_allow; > }; > > static u32 virtio_transport_get_local_cid(void) >@@ -443,6 +444,8 @@ static void virtio_vsock_rx_done(struct virtqueue *vq) > queue_work(virtio_vsock_workqueue, &vsock->rx_work); > } > >+static bool virtio_transport_seqpacket_allow(u32 remote_cid); >+ > static struct virtio_transport virtio_transport = { > .transport = { > .module = THIS_MODULE, >@@ -469,6 +472,10 @@ static struct virtio_transport virtio_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 = virtio_transport_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, >@@ -485,6 +492,19 @@ static struct virtio_transport virtio_transport = { > .send_pkt = virtio_transport_send_pkt, > }; > >+static bool virtio_transport_seqpacket_allow(u32 remote_cid) >+{ >+ struct virtio_vsock *vsock; >+ bool seqpacket_allow; >+ >+ rcu_read_lock(); >+ vsock = rcu_dereference(the_virtio_vsock); >+ seqpacket_allow = vsock->seqpacket_allow; >+ rcu_read_unlock(); >+ >+ return seqpacket_allow; >+} >+ > static void virtio_transport_rx_work(struct work_struct *work) > { > struct virtio_vsock *vsock = >@@ -612,6 +632,10 @@ static int virtio_vsock_probe(struct virtio_device *vdev) > rcu_assign_pointer(the_virtio_vsock, vsock); > > mutex_unlock(&the_virtio_vsock_mutex); >+ >+ if (vdev->features & (1ULL << VIRTIO_VSOCK_F_SEQPACKET)) We should use virtio_has_feature() to check the device features. >+ vsock->seqpacket_allow = true; When we assign the_virtio_vsock pointer, we should already set all the fields, so please move this code before the following block: # here vdev->priv = vsock; rcu_assign_pointer(the_virtio_vsock, vsock);