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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]:46854 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kKJrM-0007i9-K8 for qemu-devel@archiver.kernel.org; Mon, 21 Sep 2020 07:19:52 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:39746) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kKJpB-0006Pr-8C for qemu-devel@nongnu.org; Mon, 21 Sep 2020 07:17:37 -0400 Received: from us-smtp-delivery-124.mimecast.com ([63.128.21.124]:55492) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1kKJp9-0007mz-CQ for qemu-devel@nongnu.org; Mon, 21 Sep 2020 07:17:36 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1600687054; 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=4Qb3ETkr5QwxWU6cCxpFsZBdfYKJYlYFZv6lT4XL9Og=; b=hJvwT/POjwny8ekscfmuGK6kkHtnrQuTfa4u32yOc5uI5hoLhHRNiRXPj84XM6tSlfVt17 /qWU9kB1efWhUPsmoU/di2oj+acb2ti0SuXY5/hNkXi0a69OWhRWWeb1AoTy+QIeOtn1Nj VjA66H3YSYx2VKCeupnuY3vUEJ+NQtA= 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-452-Ia5eRWPpNluaekwjhEoi_g-1; Mon, 21 Sep 2020 07:17:28 -0400 X-MC-Unique: Ia5eRWPpNluaekwjhEoi_g-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 7BF2B8018AB; Mon, 21 Sep 2020 11:17:27 +0000 (UTC) Received: from work-vm (ovpn-114-207.ams2.redhat.com [10.36.114.207]) by smtp.corp.redhat.com (Postfix) with ESMTPS id B41BA610AF; Mon, 21 Sep 2020 11:17:25 +0000 (UTC) Date: Mon, 21 Sep 2020 12:17:23 +0100 From: "Dr. David Alan Gilbert" To: Dov Murik , sstabellini@kernel.org, anthony.perard@citrix.com Subject: Re: [PATCH] migration: Truncate state file in xen-save-devices-state Message-ID: <20200921111723.GF3221@work-vm> References: <20200921094830.114028-1-dovmurik@linux.vnet.ibm.com> MIME-Version: 1.0 In-Reply-To: <20200921094830.114028-1-dovmurik@linux.vnet.ibm.com> User-Agent: Mutt/1.14.6 (2020-07-11) X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 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=63.128.21.124; envelope-from=dgilbert@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/21 01:44:53 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -35 X-Spam_score: -3.6 X-Spam_bar: --- X-Spam_report: (-3.6 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.455, 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_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, 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: qemu-devel@nongnu.org, Juan Quintela Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" * Dov Murik (dovmurik@linux.vnet.ibm.com) wrote: > When running the xen-save-devices-state QMP command, if the filename > already exists it will be truncated before dumping the devices' state > into it. > > Signed-off-by: Dov Murik > --- OK, that looks fine to me, so: Reviewed-by: Dr. David Alan Gilbert > > Note that I found the above issue while trying to debug > xen-load-devices-state which simply fails (prints "Configuration section > missing" to stderr) directly after xen-save-devices-state (in the same > VM). I wonder if I should file a bug report as-is or investigate some > more. Advice welcome. I don't try the xen-* commands normally; I've cc'ing in Stefano and Anthony. Dave > > -Dov > > --- > migration/savevm.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff --git a/migration/savevm.c b/migration/savevm.c > index 304d98ff78..e1b26672cc 100644 > --- a/migration/savevm.c > +++ b/migration/savevm.c > @@ -2803,7 +2803,8 @@ void qmp_xen_save_devices_state(const char *filename, bool has_live, bool live, > vm_stop(RUN_STATE_SAVE_VM); > global_state_store_running(); > > - ioc = qio_channel_file_new_path(filename, O_WRONLY | O_CREAT, 0660, errp); > + ioc = qio_channel_file_new_path(filename, O_WRONLY | O_CREAT | O_TRUNC, > + 0660, errp); > if (!ioc) { > goto the_end; > } > -- > 2.20.1 > -- Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK