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 X-Spam-Level: X-Spam-Status: No, score=-13.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9C206C433ED for ; Thu, 13 May 2021 12:18:55 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id E320661353 for ; Thu, 13 May 2021 12:18:54 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E320661353 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=virtualization-bounces@lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by smtp3.osuosl.org (Postfix) with ESMTP id 970DC6067D; Thu, 13 May 2021 12:18:54 +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 jFml0dh3WXNj; Thu, 13 May 2021 12:18:53 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by smtp3.osuosl.org (Postfix) with ESMTP id 4686460661; Thu, 13 May 2021 12:18:53 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 2FC9FC000D; Thu, 13 May 2021 12:18:53 +0000 (UTC) Received: from smtp4.osuosl.org (smtp4.osuosl.org [140.211.166.137]) by lists.linuxfoundation.org (Postfix) with ESMTP id 94CD6C0001 for ; Thu, 13 May 2021 12:18:51 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp4.osuosl.org (Postfix) with ESMTP id 7566340243 for ; Thu, 13 May 2021 12:18:51 +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 wtx_OhyM_eZ2 for ; Thu, 13 May 2021 12:18:50 +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 [216.205.24.124]) by smtp4.osuosl.org (Postfix) with ESMTPS id 6D6FB401FF for ; Thu, 13 May 2021 12:18:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1620908329; 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=IK5KASvNIAH9Eni0vYhJFRLrKtUI3CSzvduC524we5U=; b=IujI65k9HavBVP0gz/XZx4Q90/NPUVQFNv6ZP0YeH1XUz0AjPKNzCmUV04/rtXhHdCJmcQ ev0lw9dbmLKzoNUmDm16tTHts++ikJ73PN4tCIfdwzYdHhPjwp52eWkLB/YYR/YFjOyfG+ htvRl56aDNZV+TdHDxbsHV8QNHaW2Ow= Received: from mail-ej1-f72.google.com (mail-ej1-f72.google.com [209.85.218.72]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-229-IlvPZF0fMbGU2mBbd4ZPQA-1; Thu, 13 May 2021 08:18:47 -0400 X-MC-Unique: IlvPZF0fMbGU2mBbd4ZPQA-1 Received: by mail-ej1-f72.google.com with SMTP id c11-20020a170906170bb02903bbefa04cd1so4574090eje.8 for ; Thu, 13 May 2021 05:18:47 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=IK5KASvNIAH9Eni0vYhJFRLrKtUI3CSzvduC524we5U=; b=Dj9ENsidH+JOvktTOGCdyHJF/K/foodFnHqYsp3BH84y6pFoH6B+Uep8iQt4nSIQob dC8I2HPa2YVkbFd2Ayhki2G4IWXWnE4ex7KqcXjsEcFD6d2768GDykgbFknZ7Mlk+fii 42jFUSMdc2+s70XwpxfatgKSoFf75vQrEVMKjW02wjBxf9ORJi/cIEU3jcMNlbmCMB6S Z6VyK1jSdtugSMPG5ULCxYZN0gr0PMG7L9UkhZsGp5nFmyxXSAc55nglMkH0kPfBIyTV aA4xgbRIsMsREdtMggA+/8lgPi+jc2s/dkZeRW6GdoSWmGwhoTsVjBtyqw42l3WtATGh lXcg== X-Gm-Message-State: AOAM5325QNwhT+pQUIDaVDcjEZsnx3ZFZ6YpSOhIyDuARXnZwxQ5kolY yC0E8P7hHeuxWMlJQ48s+NvWV4zb9mQ1fIDURiY0v7j4sedpMRhVRH9BSw2otzQZnq0Dc+ixU8x SXwxMeCCUrToTTTXmc0pV45Z1A7bpIAgfidfeTWGnDw== X-Received: by 2002:a17:906:604a:: with SMTP id p10mr4996081ejj.148.1620908320992; Thu, 13 May 2021 05:18:40 -0700 (PDT) X-Google-Smtp-Source: ABdhPJz1Vg66JpJOxLpGs+6NIjUxFfgVCqpT78vMAZP1rCCIR2bhxg+eIcIxHZ+9opyz96knLH1DNA== X-Received: by 2002:a17:906:604a:: with SMTP id p10mr4996058ejj.148.1620908320779; Thu, 13 May 2021 05:18:40 -0700 (PDT) Received: from steredhat (host-79-18-148-79.retail.telecomitalia.it. [79.18.148.79]) by smtp.gmail.com with ESMTPSA id t14sm1697687ejc.121.2021.05.13.05.18.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 13 May 2021 05:18:40 -0700 (PDT) Date: Thu, 13 May 2021 14:18:38 +0200 From: Stefano Garzarella To: Arseny Krasnov Subject: Re: [RFC PATCH v9 11/19] virtio/vsock: dequeue callback for SOCK_SEQPACKET Message-ID: <20210513121838.ndpgj56gwcww3pfc@steredhat> References: <20210508163027.3430238-1-arseny.krasnov@kaspersky.com> <20210508163523.3431999-1-arseny.krasnov@kaspersky.com> MIME-Version: 1.0 In-Reply-To: <20210508163523.3431999-1-arseny.krasnov@kaspersky.com> Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=sgarzare@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Disposition: inline Cc: Andra Paraschiv , kvm@vger.kernel.org, "Michael S. Tsirkin" , netdev@vger.kernel.org, stsp2@yandex.ru, linux-kernel@vger.kernel.org, virtualization@lists.linux-foundation.org, oxffffaa@gmail.com, Norbert Slusarek , Stefan Hajnoczi , Colin Ian King , Jakub Kicinski , "David S. Miller" , Jorgen Hansen 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-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Errors-To: virtualization-bounces@lists.linux-foundation.org Sender: "Virtualization" On Sat, May 08, 2021 at 07:35:20PM +0300, Arseny Krasnov wrote: >This adds transport callback and it's logic for SEQPACKET dequeue. >Callback fetches RW packets from rx queue of socket until whole record >is copied(if user's buffer is full, user is not woken up). This is done >to not stall sender, because if we wake up user and it leaves syscall, >nobody will send credit update for rest of record, and sender will wait >for next enter of read syscall at receiver's side. So if user buffer is >full, we just send credit update and drop data. > >Signed-off-by: Arseny Krasnov >--- > v8 -> v9: > 1) Check for RW packet type is removed from loop(all packet now > considered RW). > 2) Locking in loop is fixed. > 3) cpu_to_le32()/le32_to_cpu() now used. > 4) MSG_TRUNC handling removed from transport. > > include/linux/virtio_vsock.h | 5 ++ > net/vmw_vsock/virtio_transport_common.c | 64 +++++++++++++++++++++++++ > 2 files changed, 69 insertions(+) > >diff --git a/include/linux/virtio_vsock.h b/include/linux/virtio_vsock.h >index dc636b727179..02acf6e9ae04 100644 >--- a/include/linux/virtio_vsock.h >+++ b/include/linux/virtio_vsock.h >@@ -80,6 +80,11 @@ virtio_transport_dgram_dequeue(struct vsock_sock *vsk, > struct msghdr *msg, > size_t len, int flags); > >+ssize_t >+virtio_transport_seqpacket_dequeue(struct vsock_sock *vsk, >+ struct msghdr *msg, >+ int flags, >+ bool *msg_ready); > s64 virtio_transport_stream_has_data(struct vsock_sock *vsk); > s64 virtio_transport_stream_has_space(struct vsock_sock *vsk); > >diff --git a/net/vmw_vsock/virtio_transport_common.c b/net/vmw_vsock/virtio_transport_common.c >index ad0d34d41444..f649a21dd23b 100644 >--- a/net/vmw_vsock/virtio_transport_common.c >+++ b/net/vmw_vsock/virtio_transport_common.c >@@ -393,6 +393,58 @@ virtio_transport_stream_do_dequeue(struct vsock_sock *vsk, > return err; > } > >+static int virtio_transport_seqpacket_do_dequeue(struct vsock_sock *vsk, >+ struct msghdr *msg, >+ int flags, >+ bool *msg_ready) >+{ >+ struct virtio_vsock_sock *vvs = vsk->trans; >+ struct virtio_vsock_pkt *pkt; >+ int err = 0; >+ size_t user_buf_len = msg->msg_iter.count; Forgot to mention that also here is better to use `msg_data_left(msg)` Thanks, Stefano _______________________________________________ Virtualization mailing list Virtualization@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/virtualization