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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]:49074 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kLA0Y-0004kM-Od for qemu-devel@archiver.kernel.org; Wed, 23 Sep 2020 15:00:50 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:33232) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kL9z7-0004IF-7O for qemu-devel@nongnu.org; Wed, 23 Sep 2020 14:59:21 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:44470) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1kL9z4-0004UB-DP for qemu-devel@nongnu.org; Wed, 23 Sep 2020 14:59:20 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1600887557; 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=EvvKnHN55uswRIt1/KVKg2ByHdM7TnwpCrcplgbZqkg=; b=fPz/hW7EWWkJKbDE8ti2Ta+MZv2WH0oB9KHtZ0DbmT8n1iXCg3Dmi/bwEbvJdv+hhZlWgA ynzIBgGFvgX+aEKd5N4CKvZ/rUykP6ccUApRFfQIIVDIoUbAuUrfO4zE9q6pzcdEdK6yhV 8HuklV3THkAczcVyja2N++QQu8gwoKU= 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-589-LdJ3d8QBN-ewXWBsK8OdUg-1; Wed, 23 Sep 2020 14:59:14 -0400 X-MC-Unique: LdJ3d8QBN-ewXWBsK8OdUg-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 95FE2802B78; Wed, 23 Sep 2020 18:59:13 +0000 (UTC) Received: from work-vm (ovpn-113-46.ams2.redhat.com [10.36.113.46]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 4148719728; Wed, 23 Sep 2020 18:59:12 +0000 (UTC) Date: Wed, 23 Sep 2020 19:59:09 +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: <20200923185909.GA150308@work-vm> References: <20200921094830.114028-1-dovmurik@linux.vnet.ibm.com> <20200921111723.GF3221@work-vm> MIME-Version: 1.0 In-Reply-To: <20200921111723.GF3221@work-vm> 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=216.205.24.124; envelope-from=dgilbert@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/22 23:02:20 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -32 X-Spam_score: -3.3 X-Spam_bar: --- X-Spam_report: (-3.3 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.228, 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" * Dr. David Alan Gilbert (dgilbert@redhat.com) wrote: > * 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 Queued > > > > 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 > > -- Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK