Return-Path: Received: from mx2.netapp.com ([216.240.18.37]:26933 "EHLO mx2.netapp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752735Ab1BPSjE (ORCPT ); Wed, 16 Feb 2011 13:39:04 -0500 From: andros@netapp.com To: trond.myklebust@netapp.com Cc: linux-nfs@vger.kernel.org, Andy Adamson Subject: [PATCH pNFS wave 3 Version 2 05/18] NFSv4.1: new flag for state renewal check Date: Tue, 15 Feb 2011 03:38:50 -0500 Message-Id: <1297759143-2045-6-git-send-email-andros@netapp.com> In-Reply-To: <1297759143-2045-1-git-send-email-andros@netapp.com> References: <1297759143-2045-1-git-send-email-andros@netapp.com> Sender: linux-nfs-owner@vger.kernel.org List-ID: Content-Type: text/plain MIME-Version: 1.0 From: Andy Adamson Data servers not sharing a session with the mount MDS always have an empty cl_superblocks list. Replace the cl_superblocks empty list check to see if it is time to shut down renewd with the NFS_CS_STOP_RENEW bit which is not set by such a data server. Signed-off-by: Andy Adamson --- fs/nfs/client.c | 5 +++++ fs/nfs/nfs4renewd.c | 6 +----- include/linux/nfs_fs_sb.h | 1 + 3 files changed, 7 insertions(+), 5 deletions(-) diff --git a/fs/nfs/client.c b/fs/nfs/client.c index b9ed2a8..a86698c 100644 --- a/fs/nfs/client.c +++ b/fs/nfs/client.c @@ -1019,14 +1019,19 @@ static void nfs_server_insert_lists(struct nfs_server *server) spin_lock(&nfs_client_lock); list_add_tail_rcu(&server->client_link, &clp->cl_superblocks); list_add_tail(&server->master_link, &nfs_volume_list); + clear_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state); spin_unlock(&nfs_client_lock); } static void nfs_server_remove_lists(struct nfs_server *server) { + struct nfs_client *clp = server->nfs_client; + spin_lock(&nfs_client_lock); list_del_rcu(&server->client_link); + if (clp && list_empty(&clp->cl_superblocks)) + set_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state); list_del(&server->master_link); spin_unlock(&nfs_client_lock); diff --git a/fs/nfs/nfs4renewd.c b/fs/nfs/nfs4renewd.c index 402143d..df8e7f3 100644 --- a/fs/nfs/nfs4renewd.c +++ b/fs/nfs/nfs4renewd.c @@ -64,12 +64,8 @@ nfs4_renew_state(struct work_struct *work) ops = clp->cl_mvops->state_renewal_ops; dprintk("%s: start\n", __func__); - rcu_read_lock(); - if (list_empty(&clp->cl_superblocks)) { - rcu_read_unlock(); + if (test_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state)) goto out; - } - rcu_read_unlock(); spin_lock(&clp->cl_lock); lease = clp->cl_lease_time; diff --git a/include/linux/nfs_fs_sb.h b/include/linux/nfs_fs_sb.h index b197563..2c2dc18 100644 --- a/include/linux/nfs_fs_sb.h +++ b/include/linux/nfs_fs_sb.h @@ -30,6 +30,7 @@ struct nfs_client { #define NFS_CS_CALLBACK 1 /* - callback started */ #define NFS_CS_IDMAP 2 /* - idmap started */ #define NFS_CS_RENEWD 3 /* - renewd started */ +#define NFS_CS_STOP_RENEW 4 /* no more state to renew */ struct sockaddr_storage cl_addr; /* server identifier */ size_t cl_addrlen; char * cl_hostname; /* hostname of server */ -- 1.7.2.3