4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2011, 2013, Intel Corporation.
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/list.h>
48 #include <linux/sched.h> /* for struct task_struct, for current.h */
49 #include <linux/proc_fs.h>
50 #include <linux/mount.h>
54 unsigned int ia_attr_flags;
57 #define CLIENT_OBD_LIST_LOCK_DEBUG 1
62 #ifdef CLIENT_OBD_LIST_LOCK_DEBUG
64 struct task_struct *task;
70 #ifdef CLIENT_OBD_LIST_LOCK_DEBUG
71 static inline void __client_obd_list_lock(client_obd_lock_t *lock,
72 const char *func, int line)
74 unsigned long cur = jiffies;
76 if (spin_trylock(&lock->lock)) {
77 LASSERT(lock->task == NULL);
85 if ((jiffies - cur > 5 * HZ) &&
86 (jiffies - lock->time > 5 * HZ)) {
87 struct task_struct *task = lock->task;
92 LCONSOLE_WARN("%s:%d: lock %p was acquired"
93 " by <%s:%d:%s:%d> for %lu seconds.\n",
94 current->comm, current->pid,
95 lock, task->comm, task->pid,
96 lock->func, lock->line,
97 (jiffies - lock->time) / HZ);
98 LCONSOLE_WARN("====== for process holding the "
100 libcfs_debug_dumpstack(task);
101 LCONSOLE_WARN("====== for current process =====\n");
102 libcfs_debug_dumpstack(NULL);
103 LCONSOLE_WARN("====== end =======\n");
104 cfs_pause(1000 * HZ);
110 #define client_obd_list_lock(lock) \
111 __client_obd_list_lock(lock, __FUNCTION__, __LINE__)
113 static inline void client_obd_list_unlock(client_obd_lock_t *lock)
115 LASSERT(lock->task != NULL);
117 lock->time = jiffies;
118 spin_unlock(&lock->lock);
121 #else /* CLIENT_OBD_LIST_LOCK_DEBUG */
122 static inline void client_obd_list_lock(client_obd_lock_t *lock)
124 spin_lock(&lock->lock);
127 static inline void client_obd_list_unlock(client_obd_lock_t *lock)
129 spin_unlock(&lock->lock);
132 #endif /* !CLIENT_OBD_LIST_LOCK_DEBUG */
134 static inline void client_obd_list_lock_init(client_obd_lock_t *lock)
136 spin_lock_init(&lock->lock);
139 static inline void client_obd_list_lock_done(client_obd_lock_t *lock)
143 /* zlib_adler() is an inline function defined in zutil.h */
145 #endif /* !HAVE_ADLER */
146 #endif /* __LINUX_OBD_H */