From patchwork Tue Aug 27 15:46:07 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Frank van der Linden X-Patchwork-Id: 11143461 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 B4114924 for ; Thu, 12 Sep 2019 17:28:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8FE5A20856 for ; Thu, 12 Sep 2019 17:28:58 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=amazon.com header.i=@amazon.com header.b="ZRp1T1k6" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387626AbfILR25 (ORCPT ); Thu, 12 Sep 2019 13:28:57 -0400 Received: from smtp-fw-6001.amazon.com ([52.95.48.154]:7948 "EHLO smtp-fw-6001.amazon.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387610AbfILR2y (ORCPT ); Thu, 12 Sep 2019 13:28:54 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amazon.com; i=@amazon.com; q=dns/txt; s=amazon201209; t=1568309334; x=1599845334; h=message-id:in-reply-to:references:from:date:subject:to: mime-version; bh=/7carR8TUg6wHC1wDHhlHNRUEsQ5JS9MirXg3rUQnNE=; b=ZRp1T1k6FSRs8mTGIAY9ryncxI+781nKASTrbslw/8gGCkFB1KAlOvrm Jr/K77ImL6TATjlFxmjVsanB3/o0uT9A/i9PatKffMVJ1WIvy2qX9RfgB yy1+AjCcvoiE+44h0dZMvvw3A4XLScLewfsJzVtepXcFD2zUem8cLbWTz g=; X-IronPort-AV: E=Sophos;i="5.64,497,1559520000"; d="scan'208";a="414961241" Received: from iad6-co-svc-p1-lb1-vlan3.amazon.com (HELO email-inbound-relay-1d-5dd976cd.us-east-1.amazon.com) ([10.124.125.6]) by smtp-border-fw-out-6001.iad6.amazon.com with ESMTP; 12 Sep 2019 17:28:53 +0000 Received: from EX13MTAUWB001.ant.amazon.com (iad55-ws-svc-p15-lb9-vlan3.iad.amazon.com [10.40.159.166]) by email-inbound-relay-1d-5dd976cd.us-east-1.amazon.com (Postfix) with ESMTPS id 029AFA271F; Thu, 12 Sep 2019 17:28:52 +0000 (UTC) Received: from EX13D02UWB003.ant.amazon.com (10.43.161.48) by EX13MTAUWB001.ant.amazon.com (10.43.161.207) with Microsoft SMTP Server (TLS) id 15.0.1367.3; Thu, 12 Sep 2019 17:28:52 +0000 Received: from EX13MTAUWB001.ant.amazon.com (10.43.161.207) by EX13D02UWB003.ant.amazon.com (10.43.161.48) with Microsoft SMTP Server (TLS) id 15.0.1367.3; Thu, 12 Sep 2019 17:28:52 +0000 Received: from kaos-source-ops-60003.pdx1.corp.amazon.com (10.36.133.164) by mail-relay.amazon.com (10.43.161.249) with Microsoft SMTP Server id 15.0.1367.3 via Frontend Transport; Thu, 12 Sep 2019 17:28:51 +0000 Received: by kaos-source-ops-60003.pdx1.corp.amazon.com (Postfix, from userid 6262777) id E5A1DC056F; Thu, 12 Sep 2019 17:28:49 +0000 (UTC) Message-ID: <378aa1d4b918a6f021105564369b809ffe4d9184.1568309119.git.fllinden@amazon.com> In-Reply-To: References: From: Frank van der Linden Date: Tue, 27 Aug 2019 15:46:07 +0000 Subject: [RFC PATCH 11/35] nfs: define nfs_access_get_cached function To: , MIME-Version: 1.0 Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org The only consumer of nfs_access_get_cached_rcu and nfs_access_cached calls these static funtions in order to first try RCU access, and then locked access. Combine them in to a single function, and call that. Make this function available to the rest of the NFS code. Signed-off-by: Frank van der Linden --- fs/nfs/dir.c | 20 ++++++++++++++++---- include/linux/nfs_fs.h | 2 ++ 2 files changed, 18 insertions(+), 4 deletions(-) diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c index 0adfd8840110..e7f4c25de362 100644 --- a/fs/nfs/dir.c +++ b/fs/nfs/dir.c @@ -2285,7 +2285,7 @@ static struct nfs_access_entry *nfs_access_search_rbtree(struct inode *inode, co return NULL; } -static int nfs_access_get_cached(struct inode *inode, const struct cred *cred, struct nfs_access_entry *res, bool may_block) +static int nfs_access_get_cached_locked(struct inode *inode, const struct cred *cred, struct nfs_access_entry *res, bool may_block) { struct nfs_inode *nfsi = NFS_I(inode); struct nfs_access_entry *cache; @@ -2358,6 +2358,20 @@ static int nfs_access_get_cached_rcu(struct inode *inode, const struct cred *cre return err; } +int nfs_access_get_cached(struct inode *inode, const struct cred *cred, struct +nfs_access_entry *res, bool may_block) +{ + int status; + + status = nfs_access_get_cached_rcu(inode, cred, res); + if (status != 0) + status = nfs_access_get_cached_locked(inode, cred, res, + may_block); + + return status; +} +EXPORT_SYMBOL_GPL(nfs_access_get_cached); + static void nfs_access_add_rbtree(struct inode *inode, struct nfs_access_entry *set) { struct nfs_inode *nfsi = NFS_I(inode); @@ -2472,9 +2486,7 @@ static int nfs_do_access(struct inode *inode, const struct cred *cred, int mask) trace_nfs_access_enter(inode); - status = nfs_access_get_cached_rcu(inode, cred, &cache); - if (status != 0) - status = nfs_access_get_cached(inode, cred, &cache, may_block); + status = nfs_access_get_cached(inode, cred, &cache, may_block); if (status == 0) goto out_cached; diff --git a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h index e87c894d1960..dec76ec9808c 100644 --- a/include/linux/nfs_fs.h +++ b/include/linux/nfs_fs.h @@ -497,6 +497,8 @@ extern int nfs_instantiate(struct dentry *dentry, struct nfs_fh *fh, struct nfs_fattr *fattr, struct nfs4_label *label); extern int nfs_may_open(struct inode *inode, const struct cred *cred, int openflags); extern void nfs_access_zap_cache(struct inode *inode); +extern int nfs_access_get_cached(struct inode *inode, const struct cred *cred, struct nfs_access_entry *res, + bool may_block); /* * linux/fs/nfs/symlink.c