From patchwork Tue Oct 27 10:08:05 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Samuel Cabrero X-Patchwork-Id: 11859841 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=-12.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 A303CC61DD8 for ; Tue, 27 Oct 2020 10:08:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4C0A52225C for ; Tue, 27 Oct 2020 10:08:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2897386AbgJ0KId (ORCPT ); Tue, 27 Oct 2020 06:08:33 -0400 Received: from mx2.suse.de ([195.135.220.15]:59698 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2897392AbgJ0KIc (ORCPT ); Tue, 27 Oct 2020 06:08:32 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id B25BAB2E1 for ; Tue, 27 Oct 2020 10:08:30 +0000 (UTC) From: Samuel Cabrero To: linux-cifs@vger.kernel.org Cc: Samuel Cabrero Subject: [PATCH v2 09/11] cifs: Simplify reconnect code when dfs upcall is enabled Date: Tue, 27 Oct 2020 11:08:05 +0100 Message-Id: <20201027100807.21510-10-scabrero@suse.de> X-Mailer: git-send-email 2.29.0 In-Reply-To: <20201027100807.21510-1-scabrero@suse.de> References: <20201027100807.21510-1-scabrero@suse.de> Reply-To: scabrero@suse.de MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-cifs@vger.kernel.org Some witness notifications, like client move, tell the client to reconnect to a specific IP address. In this situation the DFS failover code path has to be skipped so clean up as much as possible the cifs_reconnect() code. Signed-off-by: Samuel Cabrero --- fs/cifs/connect.c | 21 ++++++++------------- 1 file changed, 8 insertions(+), 13 deletions(-) diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c index cb9ca4238ae9..14bbec0aeccf 100644 --- a/fs/cifs/connect.c +++ b/fs/cifs/connect.c @@ -296,7 +296,7 @@ static void cifs_prune_tlinks(struct work_struct *work); * This should be called with server->srv_mutex held. */ #ifdef CONFIG_CIFS_DFS_UPCALL -static int reconn_set_ipaddr(struct TCP_Server_Info *server) +static int reconn_set_ipaddr_from_hostname(struct TCP_Server_Info *server) { int rc; int len; @@ -331,14 +331,7 @@ static int reconn_set_ipaddr(struct TCP_Server_Info *server) return !rc ? -1 : 0; } -#else -static inline int reconn_set_ipaddr(struct TCP_Server_Info *server) -{ - return 0; -} -#endif -#ifdef CONFIG_CIFS_DFS_UPCALL /* These functions must be called with server->srv_mutex held */ static void reconn_set_next_dfs_target(struct TCP_Server_Info *server, struct cifs_sb_info *cifs_sb, @@ -346,6 +339,7 @@ static void reconn_set_next_dfs_target(struct TCP_Server_Info *server, struct dfs_cache_tgt_iterator **tgt_it) { const char *name; + int rc; if (!cifs_sb || !cifs_sb->origin_fullpath) return; @@ -370,6 +364,12 @@ static void reconn_set_next_dfs_target(struct TCP_Server_Info *server, "%s: failed to extract hostname from target: %ld\n", __func__, PTR_ERR(server->hostname)); } + + rc = reconn_set_ipaddr_from_hostname(server); + if (rc) { + cifs_dbg(FYI, "%s: failed to resolve hostname: %d\n", + __func__, rc); + } } static inline int reconn_setup_dfs_targets(struct cifs_sb_info *cifs_sb, @@ -528,11 +528,6 @@ cifs_reconnect(struct TCP_Server_Info *server) */ reconn_set_next_dfs_target(server, cifs_sb, &tgt_list, &tgt_it); #endif - rc = reconn_set_ipaddr(server); - if (rc) { - cifs_dbg(FYI, "%s: failed to resolve hostname: %d\n", - __func__, rc); - } if (cifs_rdma_enabled(server)) rc = smbd_reconnect(server);