From patchwork Sun Jan 3 19:54:52 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arseny Krasnov X-Patchwork-Id: 11995883 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=-14.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 1D817C433DB for ; Sun, 3 Jan 2021 19:56:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C88A720B1F for ; Sun, 3 Jan 2021 19:56:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727180AbhACT4R (ORCPT ); Sun, 3 Jan 2021 14:56:17 -0500 Received: from mx13.kaspersky-labs.com ([91.103.66.164]:13324 "EHLO mx13.kaspersky-labs.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725889AbhACT4Q (ORCPT ); Sun, 3 Jan 2021 14:56:16 -0500 Received: from relay13.kaspersky-labs.com (unknown [127.0.0.10]) by relay13.kaspersky-labs.com (Postfix) with ESMTP id 5C1E55212AD; Sun, 3 Jan 2021 22:55:32 +0300 (MSK) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kaspersky.com; s=mail; t=1609703732; bh=wyaj2NkC6p89cfaO82BPGLPhVCBSFLTGN/jpX6R+zpg=; h=From:To:Subject:Date:Message-ID:MIME-Version:Content-Type; b=V0WcAnczQgR9yZKK31UhIk2E3bW772wX3clSHrrX9u92EJBdbcx25CfV9bvkbZO3e dj3RhTtgaHnQGs0jcoKJX3G5bGQpH8DmZ5t3Bs1iH8hfqWrIxuE2970I26+6Y+dPYy 89ihfYjQqbqQ2/fy/BZQcHAOHV0mP8Pmm0u6sJ5g= Received: from mail-hq2.kaspersky.com (unknown [91.103.66.206]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (Client CN "mail-hq2.kaspersky.com", Issuer "Kaspersky MailRelays CA G3" (verified OK)) by mailhub13.kaspersky-labs.com (Postfix) with ESMTPS id 91E695212A2; Sun, 3 Jan 2021 22:55:31 +0300 (MSK) Received: from arseniy-pc.avp.ru (10.64.68.128) by hqmailmbx3.avp.ru (10.64.67.243) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2044.4; Sun, 3 Jan 2021 22:55:30 +0300 From: Arseny Krasnov To: Stefan Hajnoczi , Stefano Garzarella , "Michael S. Tsirkin" , Jason Wang , "David S. Miller" , Jakub Kicinski , Colin Ian King , Jorgen Hansen , Arseniy Krasnov , Andra Paraschiv , Jeff Vander Stoep CC: , , , , , Subject: [PATCH 0/5] virtio/vsock: introduce SOCK_SEQPACKET support. Date: Sun, 3 Jan 2021 22:54:52 +0300 Message-ID: <20210103195454.1954169-1-arseny.krasnov@kaspersky.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 X-Originating-IP: [10.64.68.128] X-ClientProxiedBy: hqmailmbx3.avp.ru (10.64.67.243) To hqmailmbx3.avp.ru (10.64.67.243) X-KSE-ServerInfo: hqmailmbx3.avp.ru, 9 X-KSE-AntiSpam-Interceptor-Info: scan successful X-KSE-AntiSpam-Version: 5.9.16, Database issued on: 01/03/2021 19:44:23 X-KSE-AntiSpam-Status: KAS_STATUS_NOT_DETECTED X-KSE-AntiSpam-Method: none X-KSE-AntiSpam-Rate: 10 X-KSE-AntiSpam-Info: Lua profiles 160977 [Jan 03 2021] X-KSE-AntiSpam-Info: LuaCore: 419 419 70b0c720f8ddd656e5f4eb4a4449cf8ce400df94 X-KSE-AntiSpam-Info: Version: 5.9.16.0 X-KSE-AntiSpam-Info: Envelope from: arseny.krasnov@kaspersky.com X-KSE-AntiSpam-Info: {Prob_from_in_msgid} X-KSE-AntiSpam-Info: {Tracking_date, dbl_space} X-KSE-AntiSpam-Info: {Tracking_from_domain_doesnt_match_to} X-KSE-AntiSpam-Info: d41d8cd98f00b204e9800998ecf8427e.com:7.1.1;arseniy-pc.avp.ru:7.1.1;127.0.0.199:7.1.2;kaspersky.com:7.1.1 X-KSE-AntiSpam-Info: Rate: 10 X-KSE-AntiSpam-Info: Status: not_detected X-KSE-AntiSpam-Info: Method: none X-KSE-Antiphishing-Info: Clean X-KSE-Antiphishing-ScanningType: Deterministic X-KSE-Antiphishing-Method: None X-KSE-Antiphishing-Bases: 01/03/2021 19:46:00 X-KSE-AttachmentFiltering-Interceptor-Info: no applicable attachment filtering rules found X-KSE-Antivirus-Interceptor-Info: scan successful X-KSE-Antivirus-Info: Clean, bases: 03.01.2021 17:14:00 X-KSE-BulkMessagesFiltering-Scan-Result: InTheLimit X-KSE-AttachmentFiltering-Interceptor-Info: no applicable attachment filtering rules found X-KSE-BulkMessagesFiltering-Scan-Result: InTheLimit X-KLMS-Rule-ID: 52 X-KLMS-Message-Action: clean X-KLMS-AntiSpam-Status: not scanned, disabled by settings X-KLMS-AntiSpam-Interceptor-Info: not scanned X-KLMS-AntiPhishing: Clean, bases: 2021/01/03 18:58:00 X-KLMS-AntiVirus: Kaspersky Security for Linux Mail Server, version 8.0.3.30, bases: 2021/01/03 18:13:00 #16005632 X-KLMS-AntiVirus-Status: Clean, skipped Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org As SOCK_SEQPACKET guarantees to save record boundaries, so to do it, new packet operation was added: it marks start of record (with record length in header). To send record, packet with start marker is sent first, then all data is transmitted as 'RW' packets. On receiver's side, length of record is known from packet with start record marker. Now as packets of one socket are not reordered neither on vsock nor on vhost transport layers, these marker allows to restore original record on receiver's side. When each 'RW' packet is inserted to rx queue of receiver, user is woken up, data is copied to user's buffer and credit update message is sent. If there is no user waiting for data, credit won't be updated and sender will wait. Also, if user's buffer is full, and record is bigger, all unneeded data will be dropped (with sending of credit update message). 'MSG_EOR' flag is implemented with special value of 'flags' field in packet header. When record is received with such flags, 'MSG_EOR' is set in 'recvmsg()' flags. 'MSG_TRUNC' flag is also supported. In this implementation maximum length of datagram is not limited as in stream socket. drivers/vhost/vsock.c | 6 +- include/linux/virtio_vsock.h | 7 + include/net/af_vsock.h | 4 + include/uapi/linux/virtio_vsock.h | 9 + net/vmw_vsock/af_vsock.c | 457 +++++++++++++++++++----- net/vmw_vsock/virtio_transport.c | 3 + net/vmw_vsock/virtio_transport_common.c | 323 ++++++++++++++--- 7 files changed, 673 insertions(+), 136 deletions(-)