From patchwork Thu Jun 20 14:51:01 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bruce Fields X-Patchwork-Id: 11006887 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id D25011580 for ; Thu, 20 Jun 2019 14:51:28 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C1246285CB for ; Thu, 20 Jun 2019 14:51:28 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id B5984285AA; Thu, 20 Jun 2019 14:51:28 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 4269C2873E for ; Thu, 20 Jun 2019 14:51:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726654AbfFTOv1 (ORCPT ); Thu, 20 Jun 2019 10:51:27 -0400 Received: from fieldses.org ([173.255.197.46]:43436 "EHLO fieldses.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726740AbfFTOvV (ORCPT ); Thu, 20 Jun 2019 10:51:21 -0400 Received: by fieldses.org (Postfix, from userid 2815) id 00456206B; Thu, 20 Jun 2019 10:51:20 -0400 (EDT) From: "J. Bruce Fields" To: linux-nfs@vger.kernel.org Cc: "J. Bruce Fields" Subject: [PATCH 02/16] nfsd: rename cl_refcount Date: Thu, 20 Jun 2019 10:51:01 -0400 Message-Id: <1561042275-12723-3-git-send-email-bfields@redhat.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1561042275-12723-1-git-send-email-bfields@redhat.com> References: <1561042275-12723-1-git-send-email-bfields@redhat.com> Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: "J. Bruce Fields" Rename this to a more descriptive name: it counts the number of in-progress rpc's referencing this client. Next I'm going to add a second refcount with a slightly different use. Signed-off-by: J. Bruce Fields --- fs/nfsd/nfs4state.c | 26 +++++++++++++------------- fs/nfsd/state.h | 2 +- 2 files changed, 14 insertions(+), 14 deletions(-) diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 618e66078ee5..2a13b6cbb695 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -138,7 +138,7 @@ static __be32 get_client_locked(struct nfs4_client *clp) if (is_client_expired(clp)) return nfserr_expired; - atomic_inc(&clp->cl_refcount); + atomic_inc(&clp->cl_rpc_users); return nfs_ok; } @@ -170,7 +170,7 @@ static void put_client_renew_locked(struct nfs4_client *clp) lockdep_assert_held(&nn->client_lock); - if (!atomic_dec_and_test(&clp->cl_refcount)) + if (!atomic_dec_and_test(&clp->cl_rpc_users)) return; if (!is_client_expired(clp)) renew_client_locked(clp); @@ -180,7 +180,7 @@ static void put_client_renew(struct nfs4_client *clp) { struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); - if (!atomic_dec_and_lock(&clp->cl_refcount, &nn->client_lock)) + if (!atomic_dec_and_lock(&clp->cl_rpc_users, &nn->client_lock)) return; if (!is_client_expired(clp)) renew_client_locked(clp); @@ -1857,7 +1857,7 @@ static struct nfs4_client *alloc_client(struct xdr_netobj name) clp->cl_name.len = name.len; INIT_LIST_HEAD(&clp->cl_sessions); idr_init(&clp->cl_stateids); - atomic_set(&clp->cl_refcount, 0); + atomic_set(&clp->cl_rpc_users, 0); clp->cl_cb_state = NFSD4_CB_UNKNOWN; INIT_LIST_HEAD(&clp->cl_idhash); INIT_LIST_HEAD(&clp->cl_openowners); @@ -1936,7 +1936,7 @@ unhash_client(struct nfs4_client *clp) static __be32 mark_client_expired_locked(struct nfs4_client *clp) { - if (atomic_read(&clp->cl_refcount)) + if (atomic_read(&clp->cl_rpc_users)) return nfserr_jukebox; unhash_client_locked(clp); return nfs_ok; @@ -4092,7 +4092,7 @@ static __be32 lookup_clientid(clientid_t *clid, spin_unlock(&nn->client_lock); return nfserr_expired; } - atomic_inc(&found->cl_refcount); + atomic_inc(&found->cl_rpc_users); spin_unlock(&nn->client_lock); /* Cache the nfs4_client in cstate! */ @@ -6584,7 +6584,7 @@ nfs4_check_open_reclaim(clientid_t *clid, static inline void put_client(struct nfs4_client *clp) { - atomic_dec(&clp->cl_refcount); + atomic_dec(&clp->cl_rpc_users); } static struct nfs4_client * @@ -6702,7 +6702,7 @@ nfsd_inject_add_lock_to_list(struct nfs4_ol_stateid *lst, return; lockdep_assert_held(&nn->client_lock); - atomic_inc(&clp->cl_refcount); + atomic_inc(&clp->cl_rpc_users); list_add(&lst->st_locks, collect); } @@ -6731,7 +6731,7 @@ static u64 nfsd_foreach_client_lock(struct nfs4_client *clp, u64 max, * Despite the fact that these functions deal * with 64-bit integers for "count", we must * ensure that it doesn't blow up the - * clp->cl_refcount. Throw a warning if we + * clp->cl_rpc_users. Throw a warning if we * start to approach INT_MAX here. */ WARN_ON_ONCE(count == (INT_MAX / 2)); @@ -6855,7 +6855,7 @@ nfsd_foreach_client_openowner(struct nfs4_client *clp, u64 max, if (func) { func(oop); if (collect) { - atomic_inc(&clp->cl_refcount); + atomic_inc(&clp->cl_rpc_users); list_add(&oop->oo_perclient, collect); } } @@ -6863,7 +6863,7 @@ nfsd_foreach_client_openowner(struct nfs4_client *clp, u64 max, /* * Despite the fact that these functions deal with * 64-bit integers for "count", we must ensure that - * it doesn't blow up the clp->cl_refcount. Throw a + * it doesn't blow up the clp->cl_rpc_users. Throw a * warning if we start to approach INT_MAX here. */ WARN_ON_ONCE(count == (INT_MAX / 2)); @@ -6993,7 +6993,7 @@ static u64 nfsd_find_all_delegations(struct nfs4_client *clp, u64 max, if (dp->dl_time != 0) continue; - atomic_inc(&clp->cl_refcount); + atomic_inc(&clp->cl_rpc_users); WARN_ON(!unhash_delegation_locked(dp)); list_add(&dp->dl_recall_lru, victims); } @@ -7001,7 +7001,7 @@ static u64 nfsd_find_all_delegations(struct nfs4_client *clp, u64 max, /* * Despite the fact that these functions deal with * 64-bit integers for "count", we must ensure that - * it doesn't blow up the clp->cl_refcount. Throw a + * it doesn't blow up the clp->cl_rpc_users. Throw a * warning if we start to approach INT_MAX here. */ WARN_ON_ONCE(count == (INT_MAX / 2)); diff --git a/fs/nfsd/state.h b/fs/nfsd/state.h index 0b74d371ed67..f79ad7202e82 100644 --- a/fs/nfsd/state.h +++ b/fs/nfsd/state.h @@ -347,7 +347,7 @@ struct nfs4_client { struct nfsd4_clid_slot cl_cs_slot; /* create_session slot */ u32 cl_exchange_flags; /* number of rpc's in progress over an associated session: */ - atomic_t cl_refcount; + atomic_t cl_rpc_users; struct nfs4_op_map cl_spo_must_allow; /* for nfs41 callbacks */