From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from smtp3.osuosl.org (smtp3.osuosl.org [140.211.166.136]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id CB128C433EF for ; Thu, 10 Mar 2022 12:53:32 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp3.osuosl.org (Postfix) with ESMTP id 70A3561202; Thu, 10 Mar 2022 12:53:32 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp3.osuosl.org ([127.0.0.1]) by localhost (smtp3.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id Gnt0WefX6zRh; Thu, 10 Mar 2022 12:53:31 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by smtp3.osuosl.org (Postfix) with ESMTPS id 0BA4B600D4; Thu, 10 Mar 2022 12:53:31 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id E266EC0012; Thu, 10 Mar 2022 12:53:30 +0000 (UTC) Received: from smtp4.osuosl.org (smtp4.osuosl.org [IPv6:2605:bc80:3010::137]) by lists.linuxfoundation.org (Postfix) with ESMTP id 321B8C000B for ; Thu, 10 Mar 2022 12:53:30 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp4.osuosl.org (Postfix) with ESMTP id 143CD4034D for ; Thu, 10 Mar 2022 12:53:30 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Authentication-Results: smtp4.osuosl.org (amavisd-new); dkim=pass (1024-bit key) header.d=redhat.com Received: from smtp4.osuosl.org ([127.0.0.1]) by localhost (smtp4.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 8mzF4xYg6eoi for ; Thu, 10 Mar 2022 12:53:28 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.8.0 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by smtp4.osuosl.org (Postfix) with ESMTPS id BC4F040276 for ; Thu, 10 Mar 2022 12:53:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1646916807; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=So8QGMYxxpfWPmmqVHh//vVEMI1rn7kHfqT22Jc73Ss=; b=Am9Y7TW4QHg1jCzMc4jJmsfG6TTb90FZ/MT+jV5mKiym07lBkx6LlbF6DO2BuDkuvMgjt5 +3Y2NH33KyfEH7Hqoy3GfXRhDe+AWMm/C7zMEm+4PTYIfj1s7/zFvA3W2GLm+QW8XoOkE7 Swy4MJNMq3+5Kvl2/IgzUOQ68egQ4+Y= Received: from mail-wr1-f69.google.com (mail-wr1-f69.google.com [209.85.221.69]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-206-dYR8k7DYM52Oex2ZCQHd4A-1; Thu, 10 Mar 2022 07:53:26 -0500 X-MC-Unique: dYR8k7DYM52Oex2ZCQHd4A-1 Received: by mail-wr1-f69.google.com with SMTP id z16-20020adff1d0000000b001ef7dc78b23so1654312wro.12 for ; Thu, 10 Mar 2022 04:53:26 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=So8QGMYxxpfWPmmqVHh//vVEMI1rn7kHfqT22Jc73Ss=; b=BVUFLpNQaD6imsK1DLz/F83eAH50Go47XnmE4wRTnZCDnstoVaQb/ggnYXx+ffS8u5 NRT6wZJgWh3c8YxTynaF8L62NymOKi/gdP0Ibq+g9nyhCieZQKw5ktY7Fqr9Fu+qWQaY KZdJieqczEwLvTT8OurPe1vIGuMmlTY+n7ws/ThxXkuFqH3rlN8rQ8DDQz+0/Fq53ZZe U+Dt4Ri6d4aT5N5GY6SfmzVj/wRUyttc4VhadbGdh62h+TDVIRryls/7CBIXEMY9pzje ZItZ6hNs/Eu39qTHZLcwU2GD5tuF/K4Vhf/Ro8NIIrjfPavRLFM0kD/f27VLTslDpbbK 9qog== X-Gm-Message-State: AOAM531Lyic+Qlqe0PaEIgU5GSd5X5ygIODTj8cNO6D0ORWcA3SmbIqt BUBLotg6Hoq/VGyB6lMLgAQhC+F2dN+b0BcrOV1a4mGSyeH4kTTzSOkPytPwhX5iKM+H43mk4fk 1OnNrRfI5m7vgsslrF7bpBMSEBFEWZU7sq/4xj9Ldtw== X-Received: by 2002:a5d:64e6:0:b0:203:731b:c2d0 with SMTP id g6-20020a5d64e6000000b00203731bc2d0mr3548357wri.607.1646916805250; Thu, 10 Mar 2022 04:53:25 -0800 (PST) X-Google-Smtp-Source: ABdhPJyVSQr2CaW1ajxiMtTys/vVlt+a+IEGxRB+maLH0EBTGCpgkrUpq+Z/gNxWdqTxDDthQkSJvw== X-Received: by 2002:a5d:64e6:0:b0:203:731b:c2d0 with SMTP id g6-20020a5d64e6000000b00203731bc2d0mr3548340wri.607.1646916804999; Thu, 10 Mar 2022 04:53:24 -0800 (PST) Received: from redhat.com ([2.53.27.107]) by smtp.gmail.com with ESMTPSA id g5-20020a5d64e5000000b00203914f5313sm523262wri.114.2022.03.10.04.53.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 10 Mar 2022 04:53:24 -0800 (PST) Date: Thu, 10 Mar 2022 07:53:20 -0500 From: "Michael S. Tsirkin" To: Jiyong Park Subject: Re: [PATCH 1/2] vsock: each transport cycles only on its own sockets Message-ID: <20220310075217-mutt-send-email-mst@kernel.org> References: <20220310124936.4179591-1-jiyong@google.com> <20220310124936.4179591-2-jiyong@google.com> MIME-Version: 1.0 In-Reply-To: <20220310124936.4179591-2-jiyong@google.com> Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=mst@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Disposition: inline Cc: adelva@google.com, kvm@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, virtualization@lists.linux-foundation.org, Stefan Hajnoczi , Jakub Kicinski , "David S. Miller" X-BeenThere: virtualization@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Linux virtualization List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: virtualization-bounces@lists.linux-foundation.org Sender: "Virtualization" This message had In-Reply-To: <20220310124936.4179591-1-jiyong@google.com> in its header but 20220310124936.4179591-2-jiyong@google.com was not sent to the list. Please don't do that. Instead, please write and send a proper cover letter. Thanks! On Thu, Mar 10, 2022 at 09:49:35PM +0900, Jiyong Park wrote: > When iterating over sockets using vsock_for_each_connected_socket, make > sure that a transport filters out sockets that don't belong to the > transport. > > There actually was an issue caused by this; in a nested VM > configuration, destroying the nested VM (which often involves the > closing of /dev/vhost-vsock if there was h2g connections to the nested > VM) kills not only the h2g connections, but also all existing g2h > connections to the (outmost) host which are totally unrelated. > > Tested: Executed the following steps on Cuttlefish (Android running on a > VM) [1]: (1) Enter into an `adb shell` session - to have a g2h > connection inside the VM, (2) open and then close /dev/vhost-vsock by > `exec 3< /dev/vhost-vsock && exec 3<&-`, (3) observe that the adb > session is not reset. > > [1] https://android.googlesource.com/device/google/cuttlefish/ > > Fixes: c0cfa2d8a788 ("vsock: add multi-transports support") > Signed-off-by: Jiyong Park > --- > drivers/vhost/vsock.c | 4 ++++ > net/vmw_vsock/virtio_transport.c | 7 +++++++ > net/vmw_vsock/vmci_transport.c | 5 +++++ > 3 files changed, 16 insertions(+) > > diff --git a/drivers/vhost/vsock.c b/drivers/vhost/vsock.c > index 37f0b4274113..853ddac00d5b 100644 > --- a/drivers/vhost/vsock.c > +++ b/drivers/vhost/vsock.c > @@ -722,6 +722,10 @@ static void vhost_vsock_reset_orphans(struct sock *sk) > * executing. > */ > > + /* Only handle our own sockets */ > + if (vsk->transport != &vhost_transport.transport) > + return; > + > /* If the peer is still valid, no need to reset connection */ > if (vhost_vsock_get(vsk->remote_addr.svm_cid)) > return; > diff --git a/net/vmw_vsock/virtio_transport.c b/net/vmw_vsock/virtio_transport.c > index fb3302fff627..61b24eb31d4b 100644 > --- a/net/vmw_vsock/virtio_transport.c > +++ b/net/vmw_vsock/virtio_transport.c > @@ -24,6 +24,7 @@ > static struct workqueue_struct *virtio_vsock_workqueue; > static struct virtio_vsock __rcu *the_virtio_vsock; > static DEFINE_MUTEX(the_virtio_vsock_mutex); /* protects the_virtio_vsock */ > +static struct virtio_transport virtio_transport; /* forward declaration */ > > struct virtio_vsock { > struct virtio_device *vdev; > @@ -357,11 +358,17 @@ static void virtio_vsock_event_fill(struct virtio_vsock *vsock) > > static void virtio_vsock_reset_sock(struct sock *sk) > { > + struct vsock_sock *vsk = vsock_sk(sk); > + > /* vmci_transport.c doesn't take sk_lock here either. At least we're > * under vsock_table_lock so the sock cannot disappear while we're > * executing. > */ > > + /* Only handle our own sockets */ > + if (vsk->transport != &virtio_transport.transport) > + return; > + > sk->sk_state = TCP_CLOSE; > sk->sk_err = ECONNRESET; > sk_error_report(sk); > diff --git a/net/vmw_vsock/vmci_transport.c b/net/vmw_vsock/vmci_transport.c > index 7aef34e32bdf..cd2f01513fae 100644 > --- a/net/vmw_vsock/vmci_transport.c > +++ b/net/vmw_vsock/vmci_transport.c > @@ -803,6 +803,11 @@ static void vmci_transport_handle_detach(struct sock *sk) > struct vsock_sock *vsk; > > vsk = vsock_sk(sk); > + > + /* Only handle our own sockets */ > + if (vsk->transport != &vmci_transport) > + return; > + > if (!vmci_handle_is_invalid(vmci_trans(vsk)->qp_handle)) { > sock_set_flag(sk, SOCK_DONE); > > -- > 2.35.1.723.g4982287a31-goog _______________________________________________ Virtualization mailing list Virtualization@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/virtualization