1 files changed, 128 insertions, 0 deletions
diff --git a/drivers/staging/lustre/lustre/include/linux/obd.h b/drivers/staging/lustre/lustre/include/linux/obd.h
new file mode 100644
index 000000000000..2c36c0d19d06
--- /dev/null
+++ b/drivers/staging/lustre/lustre/include/linux/obd.h
@@ -0,0 +1,128 @@
+/*
+ * 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 */