| /* |
| * 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.sun.com/software/products/lustre/docs/GPLv2.pdf |
| * |
| * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| * CA 95054 USA or visit www.sun.com if you need additional information or |
| * have any questions. |
| * |
| * GPL HEADER END |
| */ |
| /* |
| * Copyright (c) 1999, 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. |
| */ |
| |
| #ifndef __LINUX_OBD_H |
| #define __LINUX_OBD_H |
| |
| #ifndef __OBD_H |
| #error Do not #include this file directly. #include <obd.h> instead |
| #endif |
| |
| #include <obd_support.h> |
| |
| # include <linux/fs.h> |
| # include <linux/list.h> |
| # include <linux/sched.h> /* for struct task_struct, for current.h */ |
| # include <linux/proc_fs.h> |
| # include <linux/mount.h> |
| # include <linux/lustre_intent.h> |
| |
| struct ll_iattr { |
| struct iattr iattr; |
| unsigned int ia_attr_flags; |
| }; |
| |
| #define CLIENT_OBD_LIST_LOCK_DEBUG 1 |
| |
| typedef struct { |
| spinlock_t lock; |
| |
| unsigned long time; |
| struct task_struct *task; |
| const char *func; |
| int line; |
| } client_obd_lock_t; |
| |
| static inline void __client_obd_list_lock(client_obd_lock_t *lock, |
| const char *func, int line) |
| { |
| unsigned long cur = jiffies; |
| while (1) { |
| if (spin_trylock(&lock->lock)) { |
| LASSERT(lock->task == NULL); |
| lock->task = current; |
| lock->func = func; |
| lock->line = line; |
| lock->time = jiffies; |
| break; |
| } |
| |
| if ((jiffies - cur > 5 * HZ) && |
| (jiffies - lock->time > 5 * HZ)) { |
| struct task_struct *task = lock->task; |
| |
| if (task == NULL) |
| continue; |
| |
| LCONSOLE_WARN("%s:%d: lock %p was acquired" |
| " by <%s:%d:%s:%d> for %lu seconds.\n", |
| current->comm, current->pid, |
| lock, task->comm, task->pid, |
| lock->func, lock->line, |
| (jiffies - lock->time) / HZ); |
| LCONSOLE_WARN("====== for process holding the " |
| "lock =====\n"); |
| libcfs_debug_dumpstack(task); |
| LCONSOLE_WARN("====== for current process =====\n"); |
| libcfs_debug_dumpstack(NULL); |
| LCONSOLE_WARN("====== end =======\n"); |
| cfs_pause(1000 * HZ); |
| } |
| cpu_relax(); |
| } |
| } |
| |
| #define client_obd_list_lock(lock) \ |
| __client_obd_list_lock(lock, __FUNCTION__, __LINE__) |
| |
| static inline void client_obd_list_unlock(client_obd_lock_t *lock) |
| { |
| LASSERT(lock->task != NULL); |
| lock->task = NULL; |
| lock->time = jiffies; |
| spin_unlock(&lock->lock); |
| } |
| |
| |
| static inline void client_obd_list_lock_init(client_obd_lock_t *lock) |
| { |
| spin_lock_init(&lock->lock); |
| } |
| |
| static inline void client_obd_list_lock_done(client_obd_lock_t *lock) |
| {} |
| |
| #endif /* __LINUX_OBD_H */ |