From patchwork Mon Oct 24 22:38:02 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chuck Lever X-Patchwork-Id: 13018301 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 7689AC67871 for ; Tue, 25 Oct 2022 00:18:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230446AbiJYASN (ORCPT ); Mon, 24 Oct 2022 20:18:13 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40246 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230472AbiJYARw (ORCPT ); Mon, 24 Oct 2022 20:17:52 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 07E34357DB for ; Mon, 24 Oct 2022 15:38:06 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id ADEE4B816AD for ; Mon, 24 Oct 2022 22:38:04 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 40E6EC433D7; Mon, 24 Oct 2022 22:38:03 +0000 (UTC) Subject: [PATCH v5 11/13] NFSD: Refactor find_file() From: Chuck Lever To: linux-nfs@vger.kernel.org Cc: neilb@suse.de Date: Mon, 24 Oct 2022 18:38:02 -0400 Message-ID: <166665108230.50761.12047289373435044414.stgit@klimt.1015granger.net> In-Reply-To: <166664935937.50761.7812494396457965637.stgit@klimt.1015granger.net> References: <166664935937.50761.7812494396457965637.stgit@klimt.1015granger.net> User-Agent: StGit/1.5.dev3+g9561319 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org find_file() is now the only caller of find_file_locked(), so just fold these two together. Name nfs4_file-related helpers consistently. There are already nfs4_file_yada functions, so let's go with the same convention used by put_nfs4_file(): find_nfs4_file(). Signed-off-by: Chuck Lever Reviewed-by: NeilBrown --- fs/nfsd/nfs4state.c | 35 ++++++++++++++--------------------- 1 file changed, 14 insertions(+), 21 deletions(-) diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 529995a9e916..abed795bb4ec 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -4666,31 +4666,23 @@ move_to_close_lru(struct nfs4_ol_stateid *s, struct net *net) nfs4_put_stid(&last->st_stid); } -/* search file_hashtbl[] for file */ -static struct nfs4_file * -find_file_locked(const struct svc_fh *fh, unsigned int hashval) +static noinline_for_stack struct nfs4_file * +find_nfs4_file(const struct svc_fh *fhp) { - struct nfs4_file *fp; + unsigned int hashval = file_hashval(fhp); + struct nfs4_file *fi = NULL; - hlist_for_each_entry_rcu(fp, &file_hashtbl[hashval], fi_hash, - lockdep_is_held(&state_lock)) { - if (fh_match(&fp->fi_fhandle, &fh->fh_handle)) { - if (refcount_inc_not_zero(&fp->fi_ref)) - return fp; + rcu_read_lock(); + hlist_for_each_entry_rcu(fi, &file_hashtbl[hashval], fi_hash, + lockdep_is_held(&state_lock)) { + if (fh_match(&fi->fi_fhandle, &fhp->fh_handle)) { + if (!refcount_inc_not_zero(&fi->fi_ref)) + fi = NULL; + break; } } - return NULL; -} - -static struct nfs4_file * find_file(struct svc_fh *fh) -{ - struct nfs4_file *fp; - unsigned int hashval = file_hashval(fh); - - rcu_read_lock(); - fp = find_file_locked(fh, hashval); rcu_read_unlock(); - return fp; + return fi; } /* @@ -4741,9 +4733,10 @@ nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) struct nfs4_file *fp; __be32 ret = nfs_ok; - fp = find_file(current_fh); + fp = find_nfs4_file(current_fh); if (!fp) return ret; + /* Check for conflicting share reservations */ spin_lock(&fp->fi_lock); if (fp->fi_share_deny & deny_type)