From patchwork Tue Oct 6 23:58:14 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: John Snow X-Patchwork-Id: 11819459 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 856F96CA for ; Wed, 7 Oct 2020 00:18:54 +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 2B216206F0 for ; Wed, 7 Oct 2020 00:18:54 +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="B5lFqhRR" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2B216206F0 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+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Received: from localhost ([::1]:40208 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kPxAT-00018K-0Q for patchwork-qemu-devel@patchwork.kernel.org; Tue, 06 Oct 2020 20:18:53 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:38842) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kPwrU-0000DP-Ce for qemu-devel@nongnu.org; Tue, 06 Oct 2020 19:59:16 -0400 Received: from us-smtp-delivery-124.mimecast.com ([63.128.21.124]:57265) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1kPwrP-0002Oq-RN for qemu-devel@nongnu.org; Tue, 06 Oct 2020 19:59:15 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1602028751; 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: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=5wXzabkXZlXAv4NbEkdTh8mJjGPhjdHauSjMHiWu9HY=; b=B5lFqhRR2UkQY14vkdMGU2l3zT4IQXqQXysX0QomaSJ9lMXU8ywcncB+OGFBIVqADOp9ZL DOWt1k77kMAzL2GnlMV6RCwmjdsGY0CjUbqw3kpbLMkle/Gptt5jaCM344nbsM4u5heKEj yxLtQvQ4nJY1oQXpY6RGk3T0QtDBXJE= 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-414-M0qQsXwHPnqNNBisroUocg-1; Tue, 06 Oct 2020 19:59:09 -0400 X-MC-Unique: M0qQsXwHPnqNNBisroUocg-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 8A46810866AD; Tue, 6 Oct 2020 23:59:08 +0000 (UTC) Received: from scv.redhat.com (ovpn-120-38.rdu2.redhat.com [10.10.120.38]) by smtp.corp.redhat.com (Postfix) with ESMTP id C50C460BFA; Tue, 6 Oct 2020 23:59:07 +0000 (UTC) From: John Snow To: qemu-devel@nongnu.org Subject: [PATCH 17/20] python/qemu/qmp.py: Preserve error context on re-raise Date: Tue, 6 Oct 2020 19:58:14 -0400 Message-Id: <20201006235817.3280413-18-jsnow@redhat.com> In-Reply-To: <20201006235817.3280413-1-jsnow@redhat.com> References: <20201006235817.3280413-1-jsnow@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=jsnow@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=63.128.21.124; envelope-from=jsnow@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/10/06 01:55:55 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.733, 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: Kevin Wolf , Eduardo Habkost , qemu-block@nongnu.org, Max Reitz , Cleber Rosa , John Snow Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" Use the "from ..." phrasing when re-raising errors to preserve their initial context, to help aid debugging when things go wrong. This also silences a pylint 2.6.0+ error. Signed-off-by: John Snow Reviewed-by: Philippe Mathieu-Daudé Reviewed-by: Kevin Wolf --- python/qemu/qmp.py | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/python/qemu/qmp.py b/python/qemu/qmp.py index 9223307ed81..d911999da1f 100644 --- a/python/qemu/qmp.py +++ b/python/qemu/qmp.py @@ -181,10 +181,11 @@ def __get_events(self, wait: Union[bool, float] = False) -> None: self.__sock.settimeout(wait) try: ret = self.__json_read(only_event=True) - except socket.timeout: - raise QMPTimeoutError("Timeout waiting for event") - except: - raise QMPConnectError("Error while reading from socket") + except socket.timeout as err: + raise QMPTimeoutError("Timeout waiting for event") from err + except Exception as err: + msg = "Error while reading from socket" + raise QMPConnectError(msg) from err if ret is None: raise QMPConnectError("Error while reading from socket") self.__sock.settimeout(None)