From patchwork Mon Jul 12 06:05:14 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 475838 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id CB30EC07E9B for ; Mon, 12 Jul 2021 07:05:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AA12D61245 for ; Mon, 12 Jul 2021 07:05:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242750AbhGLHHV (ORCPT ); Mon, 12 Jul 2021 03:07:21 -0400 Received: from mail.kernel.org ([198.145.29.99]:41460 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S242109AbhGLHGP (ORCPT ); Mon, 12 Jul 2021 03:06:15 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 27BA861205; Mon, 12 Jul 2021 07:03:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1626073406; bh=nn2wZwDQ4zJF/JdNFxRsoTgZDjGu7g+pmHIAsJijf1c=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=GlCbUU20LQ9zxhXvaDlHyILTRQEkDjYriNdOBau2DI/KcL6XyqBDC1Ed48BdCFLbX RN35SHRtQraw7uUqhexJFwohgmeMw4KTVs/tnxiISRiTa59iocqdrwp0hRd3KIiV8g J3dYAzEpvDimKXijpwz9A8IPFKK8jl8id9JPKpvM= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, "Paulo Alcantara (SUSE)" , Aurelien Aptel , Steve French , Sasha Levin Subject: [PATCH 5.12 231/700] cifs: fix check of dfs interlinks Date: Mon, 12 Jul 2021 08:05:14 +0200 Message-Id: <20210712060959.495900905@linuxfoundation.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210712060924.797321836@linuxfoundation.org> References: <20210712060924.797321836@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Paulo Alcantara [ Upstream commit 889c2a700799f3b6f82210925e1faf4a9b833c4a ] Interlink is a special type of DFS link that resolves to a different DFS domain-based namespace. To determine whether it is an interlink or not, check if ReferralServers and StorageServers bits are set to 1 and 0 respectively in ReferralHeaderFlags, as specified in MS-DFSC 3.1.5.4.5 Determining Whether a Referral Response is an Interlink. Signed-off-by: Paulo Alcantara (SUSE) Reviewed-by: Aurelien Aptel Signed-off-by: Steve French Signed-off-by: Sasha Levin --- fs/cifs/dfs_cache.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/fs/cifs/dfs_cache.c b/fs/cifs/dfs_cache.c index 098b4bc8da59..d2d686ee10a3 100644 --- a/fs/cifs/dfs_cache.c +++ b/fs/cifs/dfs_cache.c @@ -25,8 +25,7 @@ #define CACHE_HTABLE_SIZE 32 #define CACHE_MAX_ENTRIES 64 -#define IS_INTERLINK_SET(v) ((v) & (DFSREF_REFERRAL_SERVER | \ - DFSREF_STORAGE_SERVER)) +#define IS_DFS_INTERLINK(v) (((v) & DFSREF_REFERRAL_SERVER) && !((v) & DFSREF_STORAGE_SERVER)) struct cache_dfs_tgt { char *name; @@ -170,7 +169,7 @@ static int dfscache_proc_show(struct seq_file *m, void *v) "cache entry: path=%s,type=%s,ttl=%d,etime=%ld,hdr_flags=0x%x,ref_flags=0x%x,interlink=%s,path_consumed=%d,expired=%s\n", ce->path, ce->srvtype == DFS_TYPE_ROOT ? "root" : "link", ce->ttl, ce->etime.tv_nsec, ce->ref_flags, ce->hdr_flags, - IS_INTERLINK_SET(ce->hdr_flags) ? "yes" : "no", + IS_DFS_INTERLINK(ce->hdr_flags) ? "yes" : "no", ce->path_consumed, cache_entry_expired(ce) ? "yes" : "no"); list_for_each_entry(t, &ce->tlist, list) { @@ -239,7 +238,7 @@ static inline void dump_ce(const struct cache_entry *ce) ce->srvtype == DFS_TYPE_ROOT ? "root" : "link", ce->ttl, ce->etime.tv_nsec, ce->hdr_flags, ce->ref_flags, - IS_INTERLINK_SET(ce->hdr_flags) ? "yes" : "no", + IS_DFS_INTERLINK(ce->hdr_flags) ? "yes" : "no", ce->path_consumed, cache_entry_expired(ce) ? "yes" : "no"); dump_tgts(ce);