From patchwork Mon Aug 20 14:00:46 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stanislav Kinsbursky X-Patchwork-Id: 1349061 Return-Path: X-Original-To: patchwork-linux-nfs@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork1.kernel.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by patchwork1.kernel.org (Postfix) with ESMTP id 6DC3C40B05 for ; Mon, 20 Aug 2012 14:03:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756594Ab2HTOCj (ORCPT ); Mon, 20 Aug 2012 10:02:39 -0400 Received: from mailhub.sw.ru ([195.214.232.25]:45389 "EHLO relay.sw.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756556Ab2HTOCg (ORCPT ); Mon, 20 Aug 2012 10:02:36 -0400 Received: from localhost.localdomain ([10.30.21.131]) by relay.sw.ru (8.13.4/8.13.4) with ESMTP id q7KE2SQd019339; Mon, 20 Aug 2012 18:02:28 +0400 (MSK) Subject: [PATCH v4 09/10] NFS: callback per-net usage counting introduced To: Trond.Myklebust@netapp.com From: Stanislav Kinsbursky Cc: bfields@fieldses.org, linux-nfs@vger.kernel.org, linux-kernel@vger.kernel.org, devel@openvz.org Date: Mon, 20 Aug 2012 18:00:46 +0400 Message-ID: <20120820140046.17404.26919.stgit@localhost.localdomain> In-Reply-To: <20120820134734.17404.53946.stgit@localhost.localdomain> References: <20120820134734.17404.53946.stgit@localhost.localdomain> User-Agent: StGit/0.16 MIME-Version: 1.0 Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org This patch also introduces refcount-aware nfs_callback_down_net() wrapper for svc_shutdown_net(). Signed-off-by: Stanislav Kinsbursky --- fs/nfs/callback.c | 19 +++++++++++++++++-- fs/nfs/netns.h | 1 + 2 files changed, 18 insertions(+), 2 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html diff --git a/fs/nfs/callback.c b/fs/nfs/callback.c index baafa0f..6dfdc83 100644 --- a/fs/nfs/callback.c +++ b/fs/nfs/callback.c @@ -260,10 +260,25 @@ static int nfs_callback_start_svc(int minorversion, struct rpc_xprt *xprt, return 0; } +static void nfs_callback_down_net(u32 minorversion, struct svc_serv *serv, struct net *net) +{ + struct nfs_net *nn = net_generic(net, nfs_net_id); + + if (--nn->cb_users[minorversion]) + return; + + dprintk("NFS: destroy per-net callback data; net=%p\n", net); + svc_shutdown_net(serv, net); +} + static int nfs_callback_up_net(int minorversion, struct svc_serv *serv, struct net *net) { + struct nfs_net *nn = net_generic(net, nfs_net_id); int ret; + if (nn->cb_users[minorversion]++) + return 0; + dprintk("NFS: create per-net callback data; net=%p\n", net); ret = svc_bind(serv, net); @@ -378,7 +393,7 @@ err_create: return ret; err_start: - svc_shutdown_net(serv, net); + nfs_callback_down_net(minorversion, serv, net); dprintk("NFS: Couldn't create server thread; err = %d\n", ret); goto err_net; } @@ -391,10 +406,10 @@ void nfs_callback_down(int minorversion, struct net *net) struct nfs_callback_data *cb_info = &nfs_callback_info[minorversion]; mutex_lock(&nfs_callback_mutex); + nfs_callback_down_net(minorversion, cb_info->serv, net); cb_info->users--; if (cb_info->users == 0 && cb_info->task != NULL) { kthread_stop(cb_info->task); - svc_shutdown_net(cb_info->serv, net); svc_exit_thread(cb_info->rqst); cb_info->serv = NULL; cb_info->rqst = NULL; diff --git a/fs/nfs/netns.h b/fs/nfs/netns.h index 137238b..b9c7f9b 100644 --- a/fs/nfs/netns.h +++ b/fs/nfs/netns.h @@ -24,6 +24,7 @@ struct nfs_net { struct idr cb_ident_idr; /* Protected by nfs_client_lock */ unsigned short nfs_callback_tcpport; unsigned short nfs_callback_tcpport6; + int cb_users[NFS4_MAX_MINOR_VERSION + 1]; #endif spinlock_t nfs_client_lock; struct timespec boot_time;