From patchwork Thu May 18 01:47:23 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xiubo Li X-Patchwork-Id: 13246037 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 37422C77B7A for ; Thu, 18 May 2023 01:48:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229836AbjERBsu (ORCPT ); Wed, 17 May 2023 21:48:50 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42308 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229658AbjERBsq (ORCPT ); Wed, 17 May 2023 21:48:46 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B11BC2D76 for ; Wed, 17 May 2023 18:48:01 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1684374480; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=PqsWIf6K4TW/GQ1yMBTqaw73BkuEKsboj7/HFri0j+U=; b=SB9dYQeJ3tuo3SJVUUkWtbmp3FprSZwUa39XZmvVCXhot8CVTOuRd7DcZ4662gjRAT7E2h DvHaPvNenYdDkY0i830DWYQGGFcFLi034nPNho4AMWI6DQMS8Z0/QhZBha9MjQ2vcI9RvM +HLigChwrGCvKst7Nfx4Fc8yp7C67O0= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-182-VHXJpoPvPESeIvBgiaHs7g-1; Wed, 17 May 2023 21:47:59 -0400 X-MC-Unique: VHXJpoPvPESeIvBgiaHs7g-1 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.rdu2.redhat.com [10.11.54.6]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id F41AD80067D; Thu, 18 May 2023 01:47:58 +0000 (UTC) Received: from li-a71a4dcc-35d1-11b2-a85c-951838863c8d.ibm.com.com (ovpn-12-110.pek2.redhat.com [10.72.12.110]) by smtp.corp.redhat.com (Postfix) with ESMTP id 181242166B31; Thu, 18 May 2023 01:47:53 +0000 (UTC) From: xiubli@redhat.com To: idryomov@gmail.com, ceph-devel@vger.kernel.org Cc: jlayton@kernel.org, vshankar@redhat.com, Xiubo Li , stable@vger.kernel.org, Frank Schilder Subject: [PATCH v2] ceph: force updating the msg pointer in non-split case Date: Thu, 18 May 2023 09:47:23 +0800 Message-Id: <20230518014723.148327-1-xiubli@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.6 Precedence: bulk List-ID: X-Mailing-List: ceph-devel@vger.kernel.org From: Xiubo Li When the MClientSnap reqeust's op is not CEPH_SNAP_OP_SPLIT the request may still contain a list of 'split_realms', and we need to skip it anyway. Or it will be parsed as a corrupt snaptrace. Cc: stable@vger.kernel.org Cc: Frank Schilder Reported-by: Frank Schilder URL: https://tracker.ceph.com/issues/61200 Signed-off-by: Xiubo Li --- V2: - Add a detail comment for the code. fs/ceph/snap.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/fs/ceph/snap.c b/fs/ceph/snap.c index 0e59e95a96d9..0f00f977c0f0 100644 --- a/fs/ceph/snap.c +++ b/fs/ceph/snap.c @@ -1114,6 +1114,19 @@ void ceph_handle_snap(struct ceph_mds_client *mdsc, continue; adjust_snap_realm_parent(mdsc, child, realm->ino); } + } else { + /* + * In non-SPLIT op case both the 'num_split_inos' and + * 'num_split_realms' should always be 0 and this will + * do nothing. But the MDS has one bug that in one of + * the UPDATE op cases it will pass a 'split_realms' + * list by mistake, and then will corrupted the snap + * trace in ceph_update_snap_trace(). + * + * So we should skip them anyway here. + */ + p += sizeof(u64) * num_split_inos; + p += sizeof(u64) * num_split_realms; } /*