From patchwork Thu Jun 26 19:11:55 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jeff Layton X-Patchwork-Id: 4430271 Return-Path: X-Original-To: patchwork-linux-nfs@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id CD0BD9F2C8 for ; Thu, 26 Jun 2014 19:14:12 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id CF9C6201BB for ; Thu, 26 Jun 2014 19:14:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id BF6ED202D1 for ; Thu, 26 Jun 2014 19:14:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751533AbaFZTOI (ORCPT ); Thu, 26 Jun 2014 15:14:08 -0400 Received: from mail-qc0-f181.google.com ([209.85.216.181]:58827 "EHLO mail-qc0-f181.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751432AbaFZTOH (ORCPT ); Thu, 26 Jun 2014 15:14:07 -0400 Received: by mail-qc0-f181.google.com with SMTP id x13so3523495qcv.26 for ; Thu, 26 Jun 2014 12:14:07 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:sender:from:to:cc:subject:date:message-id :in-reply-to:references; bh=4xivEmQdrubIU79oaj/MCGnwgtkDJUnOKjp8ZWFrbQY=; b=dStX6/dh0sZPuzLG32UXRooCFsmkEz2l7SJL3ykDfeNLASYWiraieae6H/PfEPuFHS VF6HJkeMoOR25qpYBurm3IKe89ZXsiqLH1fxp0qS4Zd5MCE/GdixKbud18Ez5IEYJJ1J pQzb+127c1uChQcvlLFYU9CX/eunnn87dP5mLiRVEmj7pyyY+5SLW12YI2QjaCj45Y/f lXFdavmX4rMKDBMkgXdQvzPbR25qaNQMPdrY8fX2OX6A9KRhG3seDFLrJlmj81ovjVXv dVWQG3RIMUn4I59/un0vrHSWDTcLePELR8dTOiSld3fHvQ/wjWuFUAkrWGwyO15xfyxO BnWw== X-Gm-Message-State: ALoCoQmIAX+YoXAaggI/psjEecIms5b99WRHlBHe51PNy/ZfEsHn+IEcDeoEli9W9BxU908A4AQV X-Received: by 10.229.178.202 with SMTP id bn10mr25367413qcb.6.1403810047136; Thu, 26 Jun 2014 12:14:07 -0700 (PDT) Received: from tlielax.poochiereds.net ([2001:470:8:d63:3a60:77ff:fe93:a95d]) by mx.google.com with ESMTPSA id 88sm4763039qgh.5.2014.06.26.12.14.05 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 26 Jun 2014 12:14:06 -0700 (PDT) From: Jeff Layton To: bfields@fieldses.org Cc: linux-nfs@vger.kernel.org, Trond Myklebust Subject: [PATCH v2 015/117] nfsd: lock owners are not per open stateid Date: Thu, 26 Jun 2014 15:11:55 -0400 Message-Id: <1403810017-16062-16-git-send-email-jlayton@primarydata.com> X-Mailer: git-send-email 1.9.3 In-Reply-To: <1403810017-16062-1-git-send-email-jlayton@primarydata.com> References: <1403810017-16062-1-git-send-email-jlayton@primarydata.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=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, 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 From: Trond Myklebust In the NFSv4 spec, lock stateids are per-file objects. Lockowners are not. This patch replaces the current list of lock owners in the open stateids with a list of lock stateids. Signed-off-by: Trond Myklebust Reviewed-by: Christoph Hellwig --- fs/nfsd/nfs4state.c | 51 +++++++++++++++++++++++++++++++++------------------ fs/nfsd/state.h | 3 +-- 2 files changed, 34 insertions(+), 20 deletions(-) diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 8fe76c83583e..2d7887a752db 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -728,10 +728,11 @@ static void free_generic_stateid(struct nfs4_ol_stateid *stp) nfs4_free_stid(stateid_slab, &stp->st_stid); } -static void release_lock_stateid(struct nfs4_ol_stateid *stp) +static void __release_lock_stateid(struct nfs4_ol_stateid *stp) { struct file *file; + list_del(&stp->st_locks); unhash_generic_stateid(stp); unhash_stid(&stp->st_stid); file = find_any_file(stp->st_file); @@ -746,12 +747,11 @@ static void unhash_lockowner(struct nfs4_lockowner *lo) struct nfs4_ol_stateid *stp; list_del(&lo->lo_owner.so_strhash); - list_del(&lo->lo_perstateid); list_del(&lo->lo_owner_ino_hash); while (!list_empty(&lo->lo_owner.so_stateids)) { stp = list_first_entry(&lo->lo_owner.so_stateids, struct nfs4_ol_stateid, st_perstateowner); - release_lock_stateid(stp); + __release_lock_stateid(stp); } } @@ -767,22 +767,36 @@ static void release_lockowner(struct nfs4_lockowner *lo) nfs4_free_lockowner(lo); } -static void -release_stateid_lockowners(struct nfs4_ol_stateid *open_stp) +static void release_lockowner_if_empty(struct nfs4_lockowner *lo) +{ + if (list_empty(&lo->lo_owner.so_stateids)) + release_lockowner(lo); +} + +static void release_lock_stateid(struct nfs4_ol_stateid *stp) { struct nfs4_lockowner *lo; - while (!list_empty(&open_stp->st_lockowners)) { - lo = list_entry(open_stp->st_lockowners.next, - struct nfs4_lockowner, lo_perstateid); - release_lockowner(lo); + lo = lockowner(stp->st_stateowner); + __release_lock_stateid(stp); + release_lockowner_if_empty(lo); +} + +static void release_open_stateid_locks(struct nfs4_ol_stateid *open_stp) +{ + struct nfs4_ol_stateid *stp; + + while (!list_empty(&open_stp->st_locks)) { + stp = list_entry(open_stp->st_locks.next, + struct nfs4_ol_stateid, st_locks); + release_lock_stateid(stp); } } static void unhash_open_stateid(struct nfs4_ol_stateid *stp) { unhash_generic_stateid(stp); - release_stateid_lockowners(stp); + release_open_stateid_locks(stp); close_generic_stateid(stp); } @@ -2780,7 +2794,7 @@ static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, struct nfs4_openowner *oo = open->op_openowner; stp->st_stid.sc_type = NFS4_OPEN_STID; - INIT_LIST_HEAD(&stp->st_lockowners); + INIT_LIST_HEAD(&stp->st_locks); list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); list_add(&stp->st_perfile, &fp->fi_stateids); stp->st_stateowner = &oo->oo_owner; @@ -4380,7 +4394,6 @@ static void hash_lockowner(struct nfs4_lockowner *lo, unsigned int strhashval, s list_add(&lo->lo_owner.so_strhash, &nn->ownerstr_hashtbl[strhashval]); list_add(&lo->lo_owner_ino_hash, &nn->lockowner_ino_hashtbl[inohash]); - list_add(&lo->lo_perstateid, &open_stp->st_lockowners); } /* @@ -4425,6 +4438,7 @@ alloc_init_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp, struct stp->st_access_bmap = 0; stp->st_deny_bmap = open_stp->st_deny_bmap; stp->st_openstp = open_stp; + list_add(&stp->st_locks, &open_stp->st_locks); return stp; } @@ -5012,20 +5026,21 @@ static void nfsd_print_count(struct nfs4_client *clp, unsigned int count, printk(KERN_INFO "NFS Client: %s has %u %s\n", buf, count, type); } -static u64 nfsd_foreach_client_lock(struct nfs4_client *clp, u64 max, void (*func)(struct nfs4_lockowner *)) +static u64 nfsd_foreach_client_lock(struct nfs4_client *clp, u64 max, + void (*func)(struct nfs4_ol_stateid *)) { struct nfs4_openowner *oop; - struct nfs4_lockowner *lop, *lo_next; struct nfs4_ol_stateid *stp, *st_next; + struct nfs4_ol_stateid *lst, *lst_next; u64 count = 0; list_for_each_entry(oop, &clp->cl_openowners, oo_perclient) { list_for_each_entry_safe(stp, st_next, &oop->oo_owner.so_stateids, st_perstateowner) { - list_for_each_entry_safe(lop, lo_next, - &stp->st_lockowners, lo_perstateid) { + list_for_each_entry_safe(lst, lst_next, + &stp->st_locks, st_locks) { if (func) - func(lop); + func(lst); if (++count == max) return count; } @@ -5037,7 +5052,7 @@ static u64 nfsd_foreach_client_lock(struct nfs4_client *clp, u64 max, void (*fun u64 nfsd_forget_client_locks(struct nfs4_client *clp, u64 max) { - return nfsd_foreach_client_lock(clp, max, release_lockowner); + return nfsd_foreach_client_lock(clp, max, release_lock_stateid); } u64 nfsd_print_client_locks(struct nfs4_client *clp, u64 max) diff --git a/fs/nfsd/state.h b/fs/nfsd/state.h index 3475a9eb11c7..1bfc2482ba24 100644 --- a/fs/nfsd/state.h +++ b/fs/nfsd/state.h @@ -363,7 +363,6 @@ struct nfs4_openowner { struct nfs4_lockowner { struct nfs4_stateowner lo_owner; /* must be first element */ struct list_head lo_owner_ino_hash; /* hash by owner,file */ - struct list_head lo_perstateid; struct list_head lo_list; /* for temporary uses */ }; @@ -432,7 +431,7 @@ struct nfs4_ol_stateid { struct nfs4_stid st_stid; /* must be first field */ struct list_head st_perfile; struct list_head st_perstateowner; - struct list_head st_lockowners; + struct list_head st_locks; struct nfs4_stateowner * st_stateowner; struct nfs4_file * st_file; unsigned long st_access_bmap;