/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=8:tabstop=8:
*
- * Copyright (C) 2001 Cluster File Systems, Inc. <braam@clusterfs.com>
+ * GPL HEADER START
*
- * This file is part of Lustre, http://www.lustre.org.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
- * Lustre is free software; you can redistribute it and/or
- * modify it under the terms of version 2 of the GNU General Public
- * License as published by the Free Software Foundation.
+ * 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.
*
- * Lustre 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 for more details.
+ * 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
- * along with Lustre; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ * 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
*
- * Basic library routines.
+ * 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 2008 Sun Microsystems, Inc. All rights reserved
+ * Use is subject to license terms.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
+ *
+ * lnet/include/libcfs/linux/linux-prim.h
*
+ * Basic library routines.
*/
#ifndef __LIBCFS_LINUX_CFS_PRIM_H__
#include <linux/timer.h>
#include <linux/signal.h>
#include <linux/sched.h>
+#include <linux/kthread.h>
#include <linux/miscdevice.h>
#include <libcfs/linux/portals_compat25.h>
#endif
#define cfs_unregister_sysctl_table(t) unregister_sysctl_table(t)
+#define DECLARE_PROC_HANDLER(name) \
+static int \
+LL_PROC_PROTO(name) \
+{ \
+ DECLARE_LL_PROC_PPOS_DECL; \
+ \
+ return proc_call_handler(table->data, write, \
+ ppos, buffer, lenp, \
+ __##name); \
+}
+
/*
* Symbol register
*/
*/
#define CFS_TASK_INTERRUPTIBLE TASK_INTERRUPTIBLE
#define CFS_TASK_UNINT TASK_UNINTERRUPTIBLE
+#define CFS_TASK_RUNNING TASK_RUNNING
+
+#define cfs_set_current_state(state) set_current_state(state)
typedef wait_queue_t cfs_waitlink_t;
typedef wait_queue_head_t cfs_waitq_t;
#define cfs_waitq_timedwait(l, s, t) schedule_timeout(t)
#define cfs_schedule_timeout(s, t) schedule_timeout(t)
#define cfs_schedule() schedule()
+#define cfs_kthread_run(fn, data, fmt, arg...) kthread_run(fn, data, fmt, ##arg)
/* Kernel thread */
typedef int (*cfs_thread_t)(void *);
-#define cfs_kernel_thread(func, a, f) kernel_thread(func, a, f)
+
+static inline int cfs_kernel_thread(int (*fn)(void *),
+ void *arg, unsigned long flags)
+{
+ void *orig_info = current->journal_info;
+ int rc;
+
+ current->journal_info = NULL;
+ rc = kernel_thread(fn, arg, flags);
+ current->journal_info = orig_info;
+ return rc;
+}
+
+#define CFS_MAX_SCHEDULE_TIMEOUT MAX_SCHEDULE_TIMEOUT
/*
* Task struct
return t->expires;
}
+#define CFS_MAX_SCHEDULE_TIMEOUT MAX_SCHEDULE_TIMEOUT
/* deschedule for a bit... */
static inline void cfs_pause(cfs_duration_t ticks)
schedule_timeout(ticks);
}
+#ifndef wait_event_timeout /* Only for RHEL3 2.4.21 kernel */
+#define __wait_event_timeout(wq, condition, timeout, ret) \
+do { \
+ int __ret = 0; \
+ if (!(condition)) { \
+ wait_queue_t __wait; \
+ unsigned long expire; \
+ \
+ init_waitqueue_entry(&__wait, current); \
+ expire = timeout + jiffies; \
+ add_wait_queue(&wq, &__wait); \
+ for (;;) { \
+ set_current_state(TASK_UNINTERRUPTIBLE); \
+ if (condition) \
+ break; \
+ if (jiffies > expire) { \
+ ret = jiffies - expire; \
+ break; \
+ } \
+ schedule_timeout(timeout); \
+ } \
+ current->state = TASK_RUNNING; \
+ remove_wait_queue(&wq, &__wait); \
+ } \
+} while (0)
+/*
+ retval == 0; condition met; we're good.
+ retval > 0; timed out.
+*/
+#define cfs_waitq_wait_event_timeout(wq, condition, timeout) \
+({ \
+ int __ret = 0; \
+ if (!(condition)) \
+ __wait_event_timeout(wq, condition, timeout, __ret); \
+ __ret; \
+})
+#else
+#define cfs_waitq_wait_event_timeout wait_event_timeout
+#endif
+
+#ifndef wait_event_interruptible_timeout /* Only for RHEL3 2.4.21 kernel */
+#define __wait_event_interruptible_timeout(wq, condition, timeout, ret) \
+do { \
+ int __ret = 0; \
+ if (!(condition)) { \
+ wait_queue_t __wait; \
+ unsigned long expire; \
+ \
+ init_waitqueue_entry(&__wait, current); \
+ expire = timeout + jiffies; \
+ add_wait_queue(&wq, &__wait); \
+ for (;;) { \
+ set_current_state(TASK_INTERRUPTIBLE); \
+ if (condition) \
+ break; \
+ if (jiffies > expire) { \
+ ret = jiffies - expire; \
+ break; \
+ } \
+ if (!signal_pending(current)) { \
+ schedule_timeout(timeout); \
+ continue; \
+ } \
+ ret = -ERESTARTSYS; \
+ break; \
+ } \
+ current->state = TASK_RUNNING; \
+ remove_wait_queue(&wq, &__wait); \
+ } \
+} while (0)
+
+/*
+ retval == 0; condition met; we're good.
+ retval < 0; interrupted by signal.
+ retval > 0; timed out.
+*/
+#define cfs_waitq_wait_event_interruptible_timeout(wq, condition, timeout) \
+({ \
+ int __ret = 0; \
+ if (!(condition)) \
+ __wait_event_interruptible_timeout(wq, condition, \
+ timeout, __ret); \
+ __ret; \
+})
+#else
+#define cfs_waitq_wait_event_interruptible_timeout wait_event_interruptible_timeout
+#endif
+
+#define cfs_wait_event_interruptible_exclusive(wq, condition, rc) \
+({ \
+ rc = wait_event_interruptible_exclusive(wq, condition); \
+})
+
+/*
+ * atomic
+ */
+
+typedef atomic_t cfs_atomic_t;
+
+#define cfs_atomic_read(atom) atomic_read(atom)
+#define cfs_atomic_inc(atom) atomic_inc(atom)
+#define cfs_atomic_dec(atom) atomic_dec(atom)
+#define cfs_atomic_dec_and_test(atom) atomic_dec_and_test(atom)
+#define cfs_atomic_set(atom, value) atomic_set(atom, value)
+#define cfs_atomic_add(value, atom) atomic_add(value, atom)
+#define cfs_atomic_sub(value, atom) atomic_sub(value, atom)
+
+/*
+ * membar
+ */
+
+#define cfs_mb() mb()
+
+/*
+ * interrupt
+ */
+
+#define cfs_in_interrupt() in_interrupt()
+
#else /* !__KERNEL__ */
typedef struct proc_dir_entry cfs_proc_dir_entry_t;
git://git.whamcloud.com / fs / lustre-release.git / blobdiff