diff options
Diffstat (limited to 'drivers/staging/lustre/lustre/ptlrpc/sec_gc.c')
| -rw-r--r-- | drivers/staging/lustre/lustre/ptlrpc/sec_gc.c | 190 |
1 files changed, 0 insertions, 190 deletions
diff --git a/drivers/staging/lustre/lustre/ptlrpc/sec_gc.c b/drivers/staging/lustre/lustre/ptlrpc/sec_gc.c deleted file mode 100644 index 2c8bad7b7877..000000000000 --- a/drivers/staging/lustre/lustre/ptlrpc/sec_gc.c +++ /dev/null @@ -1,190 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * GPL HEADER START - * - * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 only, - * as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License version 2 for more details (a copy is included - * in the LICENSE file that accompanied this code). - * - * You should have received a copy of the GNU General Public License - * version 2 along with this program; If not, see - * http://www.gnu.org/licenses/gpl-2.0.html - * - * GPL HEADER END - */ -/* - * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved. - * Use is subject to license terms. - * - * Copyright (c) 2011, 2012, Intel Corporation. - */ -/* - * This file is part of Lustre, http://www.lustre.org/ - * Lustre is a trademark of Sun Microsystems, Inc. - * - * lustre/ptlrpc/sec_gc.c - * - * Author: Eric Mei <ericm@clusterfs.com> - */ - -#define DEBUG_SUBSYSTEM S_SEC - -#include <linux/libcfs/libcfs.h> - -#include <obd_support.h> -#include <obd_class.h> -#include <lustre_net.h> -#include <lustre_sec.h> - -#include "ptlrpc_internal.h" - -#define SEC_GC_INTERVAL (30 * 60) - -static struct mutex sec_gc_mutex; -static LIST_HEAD(sec_gc_list); -static spinlock_t sec_gc_list_lock; - -static LIST_HEAD(sec_gc_ctx_list); -static spinlock_t sec_gc_ctx_list_lock; - -static atomic_t sec_gc_wait_del = ATOMIC_INIT(0); - -void sptlrpc_gc_add_sec(struct ptlrpc_sec *sec) -{ - LASSERT(sec->ps_policy->sp_cops->gc_ctx); - LASSERT(sec->ps_gc_interval > 0); - LASSERT(list_empty(&sec->ps_gc_list)); - - sec->ps_gc_next = ktime_get_real_seconds() + sec->ps_gc_interval; - - spin_lock(&sec_gc_list_lock); - list_add_tail(&sec->ps_gc_list, &sec_gc_list); - spin_unlock(&sec_gc_list_lock); - - CDEBUG(D_SEC, "added sec %p(%s)\n", sec, sec->ps_policy->sp_name); -} - -void sptlrpc_gc_del_sec(struct ptlrpc_sec *sec) -{ - if (list_empty(&sec->ps_gc_list)) - return; - - might_sleep(); - - /* signal before list_del to make iteration in gc thread safe */ - atomic_inc(&sec_gc_wait_del); - - spin_lock(&sec_gc_list_lock); - list_del_init(&sec->ps_gc_list); - spin_unlock(&sec_gc_list_lock); - - /* barrier */ - mutex_lock(&sec_gc_mutex); - mutex_unlock(&sec_gc_mutex); - - atomic_dec(&sec_gc_wait_del); - - CDEBUG(D_SEC, "del sec %p(%s)\n", sec, sec->ps_policy->sp_name); -} - -static void sec_process_ctx_list(void) -{ - struct ptlrpc_cli_ctx *ctx; - - spin_lock(&sec_gc_ctx_list_lock); - - while (!list_empty(&sec_gc_ctx_list)) { - ctx = list_entry(sec_gc_ctx_list.next, - struct ptlrpc_cli_ctx, cc_gc_chain); - list_del_init(&ctx->cc_gc_chain); - spin_unlock(&sec_gc_ctx_list_lock); - - LASSERT(ctx->cc_sec); - LASSERT(atomic_read(&ctx->cc_refcount) == 1); - CDEBUG(D_SEC, "gc pick up ctx %p(%u->%s)\n", - ctx, ctx->cc_vcred.vc_uid, sec2target_str(ctx->cc_sec)); - sptlrpc_cli_ctx_put(ctx, 1); - - spin_lock(&sec_gc_ctx_list_lock); - } - - spin_unlock(&sec_gc_ctx_list_lock); -} - -static void sec_do_gc(struct ptlrpc_sec *sec) -{ - LASSERT(sec->ps_policy->sp_cops->gc_ctx); - - if (unlikely(sec->ps_gc_next == 0)) { - CDEBUG(D_SEC, "sec %p(%s) has 0 gc time\n", - sec, sec->ps_policy->sp_name); - return; - } - - CDEBUG(D_SEC, "check on sec %p(%s)\n", sec, sec->ps_policy->sp_name); - - if (sec->ps_gc_next > ktime_get_real_seconds()) - return; - - sec->ps_policy->sp_cops->gc_ctx(sec); - sec->ps_gc_next = ktime_get_real_seconds() + sec->ps_gc_interval; -} - -static void sec_gc_main(struct work_struct *ws); -static DECLARE_DELAYED_WORK(sec_gc_work, sec_gc_main); - -static void sec_gc_main(struct work_struct *ws) -{ - struct ptlrpc_sec *sec; - - sec_process_ctx_list(); -again: - /* go through sec list do gc. - * FIXME here we iterate through the whole list each time which - * is not optimal. we perhaps want to use balanced binary tree - * to trace each sec as order of expiry time. - * another issue here is we wakeup as fixed interval instead of - * according to each sec's expiry time - */ - mutex_lock(&sec_gc_mutex); - list_for_each_entry(sec, &sec_gc_list, ps_gc_list) { - /* if someone is waiting to be deleted, let it - * proceed as soon as possible. - */ - if (atomic_read(&sec_gc_wait_del)) { - CDEBUG(D_SEC, "deletion pending, start over\n"); - mutex_unlock(&sec_gc_mutex); - goto again; - } - - sec_do_gc(sec); - } - mutex_unlock(&sec_gc_mutex); - - /* check ctx list again before sleep */ - sec_process_ctx_list(); - schedule_delayed_work(&sec_gc_work, SEC_GC_INTERVAL * HZ); -} - -int sptlrpc_gc_init(void) -{ - mutex_init(&sec_gc_mutex); - spin_lock_init(&sec_gc_list_lock); - spin_lock_init(&sec_gc_ctx_list_lock); - - schedule_delayed_work(&sec_gc_work, 0); - return 0; -} - -void sptlrpc_gc_fini(void) -{ - cancel_delayed_work_sync(&sec_gc_work); -} |