From patchwork Fri Apr 8 22:05:44 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eric Blake X-Patchwork-Id: 8786461 Return-Path: X-Original-To: patchwork-qemu-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 4FAD9C0553 for ; Fri, 8 Apr 2016 22:08:21 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id C53EF202E9 for ; Fri, 8 Apr 2016 22:08:20 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 1F4C020218 for ; Fri, 8 Apr 2016 22:08:20 +0000 (UTC) Received: from localhost ([::1]:58529 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aoeZf-0005bV-5n for patchwork-qemu-devel@patchwork.kernel.org; Fri, 08 Apr 2016 18:08:19 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:56162) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aoeXl-0001oE-Tc for qemu-devel@nongnu.org; Fri, 08 Apr 2016 18:06:22 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1aoeXj-0007Sb-O0 for qemu-devel@nongnu.org; Fri, 08 Apr 2016 18:06:21 -0400 Received: from mx1.redhat.com ([209.132.183.28]:37561) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aoeXj-0007SU-JO for qemu-devel@nongnu.org; Fri, 08 Apr 2016 18:06:19 -0400 Received: from int-mx11.intmail.prod.int.phx2.redhat.com (int-mx11.intmail.prod.int.phx2.redhat.com [10.5.11.24]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 4A8D6B5C29; Fri, 8 Apr 2016 22:06:19 +0000 (UTC) Received: from red.redhat.com (ovpn-113-199.phx2.redhat.com [10.3.113.199]) by int-mx11.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id u38M67UA029137; Fri, 8 Apr 2016 18:06:18 -0400 From: Eric Blake To: qemu-devel@nongnu.org Date: Fri, 8 Apr 2016 16:05:44 -0600 Message-Id: <1460153158-21612-5-git-send-email-eblake@redhat.com> In-Reply-To: <1460153158-21612-1-git-send-email-eblake@redhat.com> References: <1460153158-21612-1-git-send-email-eblake@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.24 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH 04/18] nbd: Detect servers that send unexpected error values X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Paolo Bonzini , alex@alex.org.uk Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add some debugging to flag servers that are not compliant to the NBD protocol. Signed-off-by: Eric Blake Reviewed-by: Alex Bligh --- nbd/client.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/nbd/client.c b/nbd/client.c index 42e4e52..c834587 100644 --- a/nbd/client.c +++ b/nbd/client.c @@ -33,8 +33,10 @@ static int nbd_errno_to_system_errno(int err) return ENOMEM; case NBD_ENOSPC: return ENOSPC; + default: + TRACE("Squashing unexpected error %d to EINVAL", err); + /* fallthrough */ case NBD_EINVAL: - default: return EINVAL; } }