1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright 2008 Sun Microsystems, Inc. All rights reserved
30 * Use is subject to license terms.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
41 #error Do not #include this file directly. #include <obd.h> instead
44 #include <obd_support.h>
47 # include <linux/fs.h>
48 # include <linux/list.h>
49 # include <linux/sched.h> /* for struct task_struct, for current.h */
50 # include <asm/current.h> /* for smp_lock.h */
51 # include <linux/smp_lock.h>
52 # include <linux/proc_fs.h>
53 # include <linux/mount.h>
54 # ifndef HAVE_VFS_INTENT_PATCHES
55 # include <linux/lustre_intent.h>
62 #ifdef CLIENT_OBD_LIST_LOCK_DEBUG
64 struct task_struct *task;
71 #ifdef CLIENT_OBD_LIST_LOCK_DEBUG
72 static inline void __client_obd_list_lock(client_obd_lock_t *lock,
76 unsigned long cur = jiffies;
78 if (spin_trylock(&lock->lock)) {
79 LASSERT(lock->task == NULL);
87 if ((jiffies - cur > 5 * HZ) &&
88 (jiffies - lock->time > 5 * HZ)) {
89 LCONSOLE_WARN("LOCK UP! the lock %p was acquired"
90 " by <%s:%d:%s:%d> %lu time, I'm %s:%d\n",
91 lock, lock->task->comm, lock->task->pid,
92 lock->func, lock->line,
93 (jiffies - lock->time),
94 current->comm, current->pid);
95 LCONSOLE_WARN("====== for process holding the "
97 libcfs_debug_dumpstack(lock->task);
98 LCONSOLE_WARN("====== for current process =====\n");
99 libcfs_debug_dumpstack(NULL);
100 LCONSOLE_WARN("====== end =======\n");
106 #define client_obd_list_lock(lock) \
107 __client_obd_list_lock(lock, __FUNCTION__, __LINE__)
109 static inline void client_obd_list_unlock(client_obd_lock_t *lock)
111 LASSERT(lock->task != NULL);
113 lock->time = jiffies;
114 spin_unlock(&lock->lock);
117 #else /* ifdef CLIENT_OBD_LIST_LOCK_DEBUG */
118 static inline void client_obd_list_lock(client_obd_lock_t *lock)
120 spin_lock(&lock->lock);
123 static inline void client_obd_list_unlock(client_obd_lock_t *lock)
125 spin_unlock(&lock->lock);
128 #endif /* ifdef CLIENT_OBD_LIST_LOCK_DEBUG */
130 static inline void client_obd_list_lock_init(client_obd_lock_t *lock)
132 spin_lock_init(&lock->lock);
135 static inline void client_obd_list_lock_done(client_obd_lock_t *lock)
138 #if defined(__KERNEL__) && !defined(HAVE_ADLER)
139 /* zlib_adler() is an inline function defined in zutil.h */
142 #endif /* __LINUX_OBD_H */