From patchwork Tue Oct 30 20:50:50 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bryan Schumaker X-Patchwork-Id: 1673931 Return-Path: X-Original-To: patchwork-linux-nfs@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork2.kernel.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by patchwork2.kernel.org (Postfix) with ESMTP id 862BEDFB7B for ; Tue, 30 Oct 2012 20:51:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757621Ab2J3UvD (ORCPT ); Tue, 30 Oct 2012 16:51:03 -0400 Received: from mx2.netapp.com ([216.240.18.37]:5748 "EHLO mx2.netapp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750961Ab2J3UvC (ORCPT ); Tue, 30 Oct 2012 16:51:02 -0400 X-IronPort-AV: E=Sophos;i="4.80,682,1344236400"; d="scan'208";a="705437871" Received: from smtp2.corp.netapp.com ([10.57.159.114]) by mx2-out.netapp.com with ESMTP; 30 Oct 2012 13:51:01 -0700 Received: from davros.hq.netapp.com (davros.hq.netapp.com [10.63.233.208]) by smtp2.corp.netapp.com (8.13.1/8.13.1/NTAP-1.6) with ESMTP id q9UKos1A017270; Tue, 30 Oct 2012 13:51:01 -0700 (PDT) From: bjschuma@netapp.com To: bfields@fieldses.org Cc: linux-nfs@vger.kernel.org Subject: [PATCH v2 06/10] NFSD: Clean up forgetting and recalling delegations Date: Tue, 30 Oct 2012 16:50:50 -0400 Message-Id: <1351630254-26166-7-git-send-email-bjschuma@netapp.com> X-Mailer: git-send-email 1.8.0 In-Reply-To: <1351630254-26166-1-git-send-email-bjschuma@netapp.com> References: <1351630254-26166-1-git-send-email-bjschuma@netapp.com> Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org From: Bryan Schumaker Once I have a client, I can easily use its delegation list rather than searching the file hash table for delegations to remove. Signed-off-by: Bryan Schumaker --- fs/nfsd/nfs4state.c | 94 ++++++++++++++++++++++++++++------------------------- 1 file changed, 50 insertions(+), 44 deletions(-) diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 552925e..49ab5c4 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -4595,6 +4595,52 @@ static u64 nfsd_forget_client_openowners(struct nfs4_client *clp, u64 max) return count; } +static u64 nfsd_find_n_delegations(struct nfs4_client *clp, u64 max, + struct list_head *victims) +{ + struct nfs4_delegation *dp, *next; + u64 count = 0; + + list_for_each_entry_safe(dp, next, &clp->cl_delegations, dl_perclnt) { + list_move(&dp->dl_recall_lru, victims); + if (++count == max) + break; + } + return count; +} + +static u64 nfsd_forget_client_delegations(struct nfs4_client *clp, u64 max) +{ + struct nfs4_delegation *dp, *next; + LIST_HEAD(victims); + u64 count; + + spin_lock(&recall_lock); + count = nfsd_find_n_delegations(clp, max, &victims); + spin_unlock(&recall_lock); + + list_for_each_entry_safe(dp, next, &victims, dl_recall_lru) + unhash_delegation(dp); + + return count; +} + +static u64 nfsd_recall_client_delegations(struct nfs4_client *clp, u64 max) +{ + struct nfs4_delegation *dp, *next; + LIST_HEAD(victims); + u64 count; + + spin_lock(&recall_lock); + + count = nfsd_find_n_delegations(clp, max, &victims); + list_for_each_entry_safe(dp, next, &victims, dl_recall_lru) + nfsd_break_one_deleg(dp); + + spin_unlock(&recall_lock); + return count; +} + static u64 nfsd_for_n_state(u64 max, u64 (*func)(struct nfs4_client *, u64)) { struct nfs4_client *clp, *next; @@ -4627,56 +4673,16 @@ void nfsd_forget_openowners(u64 num) printk(KERN_INFO "NFSD: Forgot %llu open owners", count); } -static int nfsd_process_n_delegations(u64 num, struct list_head *list) -{ - int i, count = 0; - struct nfs4_file *fp, *fnext; - struct nfs4_delegation *dp, *dnext; - - for (i = 0; i < FILE_HASH_SIZE; i++) { - list_for_each_entry_safe(fp, fnext, &file_hashtbl[i], fi_hash) { - list_for_each_entry_safe(dp, dnext, &fp->fi_delegations, dl_perfile) { - list_move(&dp->dl_recall_lru, list); - if (++count == num) - return count; - } - } - } - - return count; -} - void nfsd_forget_delegations(u64 num) { - unsigned int count; - LIST_HEAD(victims); - struct nfs4_delegation *dp, *dnext; - - spin_lock(&recall_lock); - count = nfsd_process_n_delegations(num, &victims); - spin_unlock(&recall_lock); - - list_for_each_entry_safe(dp, dnext, &victims, dl_recall_lru) - unhash_delegation(dp); - - printk(KERN_INFO "NFSD: Forgot %d delegations", count); + u64 count = nfsd_for_n_state(num, nfsd_forget_client_delegations); + printk(KERN_INFO "NFSD: Forgot %llu delegations", count); } void nfsd_recall_delegations(u64 num) { - unsigned int count; - LIST_HEAD(victims); - struct nfs4_delegation *dp, *dnext; - - spin_lock(&recall_lock); - count = nfsd_process_n_delegations(num, &victims); - list_for_each_entry_safe(dp, dnext, &victims, dl_recall_lru) { - list_del(&dp->dl_recall_lru); - nfsd_break_one_deleg(dp); - } - spin_unlock(&recall_lock); - - printk(KERN_INFO "NFSD: Recalled %d delegations", count); + u64 count = nfsd_for_n_state(num, nfsd_recall_client_delegations); + printk(KERN_INFO "NFSD: Recalled %llu delegations", count); } #endif /* CONFIG_NFSD_FAULT_INJECTION */