From patchwork Sun Aug 10 15:43:57 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kinglong Mee X-Patchwork-Id: 4704841 Return-Path: X-Original-To: patchwork-linux-nfs@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id EA86FC0338 for ; Sun, 10 Aug 2014 15:44:13 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 11ABD20160 for ; Sun, 10 Aug 2014 15:44:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2FD5E2015D for ; Sun, 10 Aug 2014 15:44:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751271AbaHJPoK (ORCPT ); Sun, 10 Aug 2014 11:44:10 -0400 Received: from mail-pd0-f179.google.com ([209.85.192.179]:43922 "EHLO mail-pd0-f179.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751249AbaHJPoJ (ORCPT ); Sun, 10 Aug 2014 11:44:09 -0400 Received: by mail-pd0-f179.google.com with SMTP id v10so3486045pde.24 for ; Sun, 10 Aug 2014 08:44:09 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=message-id:date:from:user-agent:mime-version:to:cc:subject :references:in-reply-to:content-type:content-transfer-encoding; bh=Z90LHN6zJDhCe48iXuvPEdZkHGqGtC36RWYUKDV66nE=; b=MPcQtWy2Qa7/2SDZ0bcB+H8xHIHpUI1aVuApZsm29PJt4SI0fk3qnYrFJNtrAYiUs7 nqm14+ETO1PGSLmo/7JTqz8PoIp9j+DpT34me/UgCY83HT+3DhzZHY7J4ras+l7iJq62 q9wGGSXI8pjMk/KX/hrVCMSCX4GWPN/MkfMrmhRgLhAUl1PKNsIGvW/4xA0ONDtLhBne LnVmFUt6gSrEWz9ZnSbBJum/RKfxbvDFcCCN4YJ2XhNcHTUMzSP3AmhwiEtngrIq9M3X imEuqmPKFOUV9I7Lqe0hPK+1I/V7vd2uGOvIJa21CbG+a7oGkJqi6ZJyZNntbZbeu7J8 tRHA== X-Received: by 10.70.36.239 with SMTP id t15mr17848200pdj.83.1407685449030; Sun, 10 Aug 2014 08:44:09 -0700 (PDT) Received: from [192.168.0.100] ([118.117.121.97]) by mx.google.com with ESMTPSA id mb6sm3734812pdb.96.2014.08.10.08.44.02 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sun, 10 Aug 2014 08:44:07 -0700 (PDT) Message-ID: <53E7933D.80504@gmail.com> Date: Sun, 10 Aug 2014 23:43:57 +0800 From: Kinglong Mee User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:31.0) Gecko/20100101 Thunderbird/31.0 MIME-Version: 1.0 To: Jeff Layton CC: "J. Bruce Fields" , Linux NFS Mailing List , Trond Myklebust , linux-fsdevel@vger.kernel.org, kinglongmee@gmail.com Subject: [PATCH 3/3 v2] NFSD: Increase the reference of lockowner when coping file_lock References: <53BAAAC5.9000106@gmail.com> <53E22EA5.70708@gmail.com> <20140809065112.700e0ecc@tlielax.poochiereds.net> <53E791F1.40802@gmail.com> In-Reply-To: <53E791F1.40802@gmail.com> Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org X-Spam-Status: No, score=-7.5 required=5.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED, DKIM_SIGNED, FREEMAIL_FROM, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, T_DKIM_INVALID, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP v2: Fix bad using of struct file_lock_operations for handle the owner. Signed-off-by: Kinglong Mee --- fs/nfsd/nfs4state.c | 32 ++++++++++++++++++++++++++++++-- 1 file changed, 30 insertions(+), 2 deletions(-) diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 2e80a59..24a8d91 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -4867,9 +4867,33 @@ nfs4_transform_lock_offset(struct file_lock *lock) lock->fl_end = OFFSET_MAX; } +static inline struct nfs4_lockowner *get_lockowner(struct nfs4_lockowner *lo) +{ + atomic_inc(&lo->lo_owner.so_count); + return lo; +} + +static void nfsd4_fl_copy_owner(struct file_lock *dst, struct file_lock *src) +{ + struct nfs4_lockowner *lo = (struct nfs4_lockowner *) src->fl_owner; + dst->fl_owner = (fl_owner_t) get_lockowner(lo); +} + +static void nfsd4_fl_release_owner(struct file_lock *fl) +{ + struct nfs4_lockowner *lo = (struct nfs4_lockowner *) fl->fl_owner; + + if (lo) { + nfs4_put_stateowner(&lo->lo_owner); + fl->fl_owner = NULL; + } +} + /* Hack!: For now, we're defining this just so we can use a pointer to it * as a unique cookie to identify our (NFSv4's) posix locks. */ static const struct lock_manager_operations nfsd_posix_mng_ops = { + .lm_copy_owner = nfsd4_fl_copy_owner, + .lm_release_owner = nfsd4_fl_release_owner, }; static inline void @@ -5238,7 +5262,8 @@ nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, status = nfserr_openmode; goto out; } - file_lock->fl_owner = (fl_owner_t)lock_sop; + + file_lock->fl_owner = (fl_owner_t)get_lockowner(lock_sop); file_lock->fl_pid = current->tgid; file_lock->fl_file = filp; file_lock->fl_flags = FL_POSIX; @@ -5405,6 +5430,7 @@ nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfs4_ol_stateid *stp; struct file *filp = NULL; struct file_lock *file_lock = NULL; + struct nfs4_lockowner *lock_sop = NULL; __be32 status; int err; struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); @@ -5426,6 +5452,8 @@ nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, status = nfserr_lock_range; goto put_stateid; } + + lock_sop = lockowner(stp->st_stateowner); file_lock = locks_alloc_lock(); if (!file_lock) { dprintk("NFSD: %s: unable to allocate lock!\n", __func__); @@ -5434,7 +5462,7 @@ nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, } locks_init_lock(file_lock); file_lock->fl_type = F_UNLCK; - file_lock->fl_owner = (fl_owner_t)lockowner(stp->st_stateowner); + file_lock->fl_owner = (fl_owner_t)get_lockowner(lock_sop); file_lock->fl_pid = current->tgid; file_lock->fl_file = filp; file_lock->fl_flags = FL_POSIX;