From patchwork Wed Jun 16 14:43:14 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Julien Grall X-Patchwork-Id: 12325401 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=-13.8 required=3.0 tests=BAYES_00,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=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 EA030C48BE5 for ; Wed, 16 Jun 2021 14:43:42 +0000 (UTC) Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (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 9FCEF610A1 for ; Wed, 16 Jun 2021 14:43:42 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9FCEF610A1 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=xen.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=xen-devel-bounces@lists.xenproject.org Received: from list by lists.xenproject.org with outflank-mailman.143279.264112 (Exim 4.92) (envelope-from ) id 1ltWlO-00050I-SZ; Wed, 16 Jun 2021 14:43:30 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 143279.264112; Wed, 16 Jun 2021 14:43:30 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1ltWlO-00050A-Pg; Wed, 16 Jun 2021 14:43:30 +0000 Received: by outflank-mailman (input) for mailman id 143279; Wed, 16 Jun 2021 14:43:29 +0000 Received: from mail.xenproject.org ([104.130.215.37]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1ltWlN-0004zz-Ao for xen-devel@lists.xenproject.org; Wed, 16 Jun 2021 14:43:29 +0000 Received: from xenbits.xenproject.org ([104.239.192.120]) by mail.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1ltWlL-0004CW-Px; Wed, 16 Jun 2021 14:43:27 +0000 Received: from 54-240-197-235.amazon.com ([54.240.197.235] helo=ufe34d9ed68d054.ant.amazon.com) by xenbits.xenproject.org with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1ltWlL-0007D0-Fu; Wed, 16 Jun 2021 14:43:27 +0000 X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=xen.org; s=20200302mail; h=Message-Id:Date:Subject:Cc:To:From; bh=fZA6YmLD+LYE4dV/8CG4YJOfv9OzLD5ZRPfM2lCkh+Q=; b=xd8PGOKz5NX1zZk2AA7OGBohAG KQ34FbO6P//4gZUvN1fDjPNp3As2KeTEmCniNx/n1MmGUQskevFqpZv4Cy/qZ04As8RUmUjUMg6t+ C9LKzjME2NR13uAeXHm2eE8IIxrvZg/I6OVJiSGNXvkRdWD9XW7IrfPneYYKfbW8rZd0=; From: Julien Grall To: xen-devel@lists.xenproject.org Cc: raphning@amazon.co.uk, doebel@amazon.de, Julien Grall , Andrew Cooper , George Dunlap , Ian Jackson , Jan Beulich , Julien Grall , Stefano Stabellini , Wei Liu , Juergen Gross Subject: [PATCH 00/10] tools/xenstored: Bug fixes + Improve Live-Update Date: Wed, 16 Jun 2021 15:43:14 +0100 Message-Id: <20210616144324.31652-1-julien@xen.org> X-Mailer: git-send-email 2.17.1 From: Julien Grall Hi all, At the moment, Live-Update will, by default, not proceed if there are in-flight transactions. It is possible force it by passing -F but this will break any connection with in-flight transactions. There are PV drivers out that may never terminate some transaction. On host running such guest, we would need to use -F. Unfortunately, this also risks to break well-behaving guests (and even dom0) because Live-Update will happen as soon as the timeout is hit. This series aims to allow to Live-Update more safely even when the option -F is used. The first part of the series contains a few fixes for bug found while testing Live-Update. Cheers, Julien Grall (10): MAINTAINERS: Add myself as reviewers for tools/xenstore tools/xenstored: Introduce lu_get_connection() and use it tools/xenstore: Don't assume conn->in points to the LU request tools/xenstored: Limit the number of requests a connection can delay tools/xenstored: xenstored_core.h should include fcntl.h tools/xenstored: Introduce a wrapper for conn->funcs->can_{read, write} tools/xenstored: delay_request: don't assume conn->in == in tools/xenstored: Extend restore code to handle multiple input buffer tools/xenstored: Dump delayed requests tools/xenstored: Delay new transaction while Live-Update is pending MAINTAINERS | 1 + tools/xenstore/xenstored_control.c | 66 +++++++++- tools/xenstore/xenstored_control.h | 7 ++ tools/xenstore/xenstored_core.c | 196 +++++++++++++++++++++++------ tools/xenstore/xenstored_core.h | 8 +- tools/xenstore/xenstored_domain.c | 46 +++---- tools/xenstore/xenstored_domain.h | 6 +- 7 files changed, 255 insertions(+), 75 deletions(-)