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=-8.3 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 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 B6AB0C433DF for ; Thu, 6 Aug 2020 17:42:49 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (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 EE7A4206B2 for ; Thu, 6 Aug 2020 17:42:49 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="PgXtUSse" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org EE7A4206B2 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:40530 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1k3jui-0000Li-Fh for qemu-devel@archiver.kernel.org; Thu, 06 Aug 2020 13:42:48 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:50130) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1k3jtp-00086Y-W2 for qemu-devel@nongnu.org; Thu, 06 Aug 2020 13:41:54 -0400 Received: from us-smtp-1.mimecast.com ([207.211.31.81]:58889 helo=us-smtp-delivery-1.mimecast.com) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1k3jtn-0003e3-BQ for qemu-devel@nongnu.org; Thu, 06 Aug 2020 13:41:53 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1596735709; 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=IfZqQVb08zVDwERy79CxS6bWfvRty1789liDe8KoePU=; b=PgXtUSsebaBmVk8yZFyzgTF3zUiUg26v+zvv6KuNWAsV4lagjDpbxOPE8AJHfFci9RuNvc 3t9nhvTAoYduGFshdWuIMQUscEj0jTY46lqc8NkKMMcFkIEkVgBBcdFswJL7QbKdfoTfsT TlbKATVA4bJ0BOUfbg8VYDW7PeNMnU0= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-213-sGa_kf-RPAOLvOHDMqk0Dw-1; Thu, 06 Aug 2020 13:41:37 -0400 X-MC-Unique: sGa_kf-RPAOLvOHDMqk0Dw-1 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 39CE08015FB; Thu, 6 Aug 2020 17:41:36 +0000 (UTC) Received: from work-vm (ovpn-114-105.ams2.redhat.com [10.36.114.105]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 6BCCE19D7E; Thu, 6 Aug 2020 17:41:32 +0000 (UTC) Date: Thu, 6 Aug 2020 18:41:29 +0100 From: "Dr. David Alan Gilbert" To: "misono.tomohiro@fujitsu.com" Subject: Re: [Virtio-fs] [PATCH] virtiofsd: Disable remote posix locks by default Message-ID: <20200806174129.GK2711@work-vm> References: <20200727161841.GA54539@redhat.com> MIME-Version: 1.0 In-Reply-To: User-Agent: Mutt/1.14.6 (2020-07-11) X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=dgilbert@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Received-SPF: pass client-ip=207.211.31.81; envelope-from=dgilbert@redhat.com; helo=us-smtp-delivery-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/08/06 05:03:13 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -30 X-Spam_score: -3.1 X-Spam_bar: --- X-Spam_report: (-3.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H3=-0.01, RCVD_IN_MSPIKE_WL=-0.01, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: virtio-fs-list , "qemu-devel@nongnu.org" , 'Vivek Goyal' Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" * misono.tomohiro@fujitsu.com (misono.tomohiro@fujitsu.com) wrote: > > Right now we enable remote posix locks by default. That means when guest does a posix lock it sends request to server > > (virtiofsd). But currently we only support non-blocking posix lock and return -EOPNOTSUPP for blocking version. > > > > This means that existing applications which are doing blocking posix locks get -EOPNOTSUPP and fail. To avoid this, > > people have been running virtiosd with option "-o no_posix_lock". For new users it is still a surprise and trial and error > > takes them to this option. > > > > Given posix lock implementation is not complete in virtiofsd, disable it by default. This means that posix locks will work > > with-in applications in a guest but not across guests. Anyway we don't support sharing filesystem among different guests > > yet in virtiofs so this should not lead to any kind of surprise or regression and will make life little easier for virtiofs users. > > > > Reported-by: Aa Aa > > Suggested-by: Miklos Szeredi > > Signed-off-by: Vivek Goyal > > --- > > tools/virtiofsd/passthrough_ll.c | 2 +- > > 1 file changed, 1 insertion(+), 1 deletion(-) > > We should update docs/tools/virtiofsd.rst as well. Given that: > Reviewed-by: Misono Tomohiro Fixed up the doc. Dave > > _______________________________________________ > Virtio-fs mailing list > Virtio-fs@redhat.com > https://www.redhat.com/mailman/listinfo/virtio-fs -- Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK