1 files changed, 0 insertions, 461 deletions
diff --git a/module/spl/spl-condvar.c b/module/spl/spl-condvar.c
deleted file mode 100644
index 3cc33da62..000000000
--- a/module/spl/spl-condvar.c
+++ /dev/null
@@ -1,461 +0,0 @@
-/*
- *  Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC.
- *  Copyright (C) 2007 The Regents of the University of California.
- *  Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
- *  Written by Brian Behlendorf <[email protected]>.
- *  UCRL-CODE-235197
- *
- *  This file is part of the SPL, Solaris Porting Layer.
- *  For details, see <http://zfsonlinux.org/>.
- *
- *  The SPL is free software; you can redistribute it and/or modify it
- *  under the terms of the GNU General Public License as published by the
- *  Free Software Foundation; either version 2 of the License, or (at your
- *  option) any later version.
- *
- *  The SPL 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.
- *
- *  You should have received a copy of the GNU General Public License along
- *  with the SPL.  If not, see <http://www.gnu.org/licenses/>.
- *
- *  Solaris Porting Layer (SPL) Credential Implementation.
- */
-
-#include <sys/condvar.h>
-#include <sys/time.h>
-#include <sys/sysmacros.h>
-#include <linux/hrtimer.h>
-#include <linux/compiler_compat.h>
-#include <linux/mod_compat.h>
-
-#include <linux/sched.h>
-
-#ifdef HAVE_SCHED_SIGNAL_HEADER
-#include <linux/sched/signal.h>
-#endif
-
-#define	MAX_HRTIMEOUT_SLACK_US	1000
-unsigned int spl_schedule_hrtimeout_slack_us = 0;
-
-static int
-param_set_hrtimeout_slack(const char *buf, zfs_kernel_param_t *kp)
-{
-	unsigned long val;
-	int error;
-
-	error = kstrtoul(buf, 0, &val);
-	if (error)
-		return (error);
-
-	if (val > MAX_HRTIMEOUT_SLACK_US)
-		return (-EINVAL);
-
-	error = param_set_uint(buf, kp);
-	if (error < 0)
-		return (error);
-
-	return (0);
-}
-
-module_param_call(spl_schedule_hrtimeout_slack_us, param_set_hrtimeout_slack,
-	param_get_uint, &spl_schedule_hrtimeout_slack_us, 0644);
-MODULE_PARM_DESC(spl_schedule_hrtimeout_slack_us,
-	"schedule_hrtimeout_range() delta/slack value in us, default(0)");
-
-void
-__cv_init(kcondvar_t *cvp, char *name, kcv_type_t type, void *arg)
-{
-	ASSERT(cvp);
-	ASSERT(name == NULL);
-	ASSERT(type == CV_DEFAULT);
-	ASSERT(arg == NULL);
-
-	cvp->cv_magic = CV_MAGIC;
-	init_waitqueue_head(&cvp->cv_event);
-	init_waitqueue_head(&cvp->cv_destroy);
-	atomic_set(&cvp->cv_waiters, 0);
-	atomic_set(&cvp->cv_refs, 1);
-	cvp->cv_mutex = NULL;
-}
-EXPORT_SYMBOL(__cv_init);
-
-static int
-cv_destroy_wakeup(kcondvar_t *cvp)
-{
-	if (!atomic_read(&cvp->cv_waiters) && !atomic_read(&cvp->cv_refs)) {
-		ASSERT(cvp->cv_mutex == NULL);
-		ASSERT(!waitqueue_active(&cvp->cv_event));
-		return (1);
-	}
-
-	return (0);
-}
-
-void
-__cv_destroy(kcondvar_t *cvp)
-{
-	ASSERT(cvp);
-	ASSERT(cvp->cv_magic == CV_MAGIC);
-
-	cvp->cv_magic = CV_DESTROY;
-	atomic_dec(&cvp->cv_refs);
-
-	/* Block until all waiters are woken and references dropped. */
-	while (cv_destroy_wakeup(cvp) == 0)
-		wait_event_timeout(cvp->cv_destroy, cv_destroy_wakeup(cvp), 1);
-
-	ASSERT3P(cvp->cv_mutex, ==, NULL);
-	ASSERT3S(atomic_read(&cvp->cv_refs), ==, 0);
-	ASSERT3S(atomic_read(&cvp->cv_waiters), ==, 0);
-	ASSERT3S(waitqueue_active(&cvp->cv_event), ==, 0);
-}
-EXPORT_SYMBOL(__cv_destroy);
-
-static void
-cv_wait_common(kcondvar_t *cvp, kmutex_t *mp, int state, int io)
-{
-	DEFINE_WAIT(wait);
-	kmutex_t *m;
-
-	ASSERT(cvp);
-	ASSERT(mp);
-	ASSERT(cvp->cv_magic == CV_MAGIC);
-	ASSERT(mutex_owned(mp));
-	atomic_inc(&cvp->cv_refs);
-
-	m = READ_ONCE(cvp->cv_mutex);
-	if (!m)
-		m = xchg(&cvp->cv_mutex, mp);
-	/* Ensure the same mutex is used by all callers */
-	ASSERT(m == NULL || m == mp);
-
-	prepare_to_wait_exclusive(&cvp->cv_event, &wait, state);
-	atomic_inc(&cvp->cv_waiters);
-
-	/*
-	 * Mutex should be dropped after prepare_to_wait() this
-	 * ensures we're linked in to the waiters list and avoids the
-	 * race where 'cvp->cv_waiters > 0' but the list is empty.
-	 */
-	mutex_exit(mp);
-	if (io)
-		io_schedule();
-	else
-		schedule();
-
-	/* No more waiters a different mutex could be used */
-	if (atomic_dec_and_test(&cvp->cv_waiters)) {
-		/*
-		 * This is set without any lock, so it's racy. But this is
-		 * just for debug anyway, so make it best-effort
-		 */
-		cvp->cv_mutex = NULL;
-		wake_up(&cvp->cv_destroy);
-	}
-
-	finish_wait(&cvp->cv_event, &wait);
-	atomic_dec(&cvp->cv_refs);
-
-	/*
-	 * Hold mutex after we release the cvp, otherwise we could dead lock
-	 * with a thread holding the mutex and call cv_destroy.
-	 */
-	mutex_enter(mp);
-}
-
-void
-__cv_wait(kcondvar_t *cvp, kmutex_t *mp)
-{
-	cv_wait_common(cvp, mp, TASK_UNINTERRUPTIBLE, 0);
-}
-EXPORT_SYMBOL(__cv_wait);
-
-void
-__cv_wait_io(kcondvar_t *cvp, kmutex_t *mp)
-{
-	cv_wait_common(cvp, mp, TASK_UNINTERRUPTIBLE, 1);
-}
-EXPORT_SYMBOL(__cv_wait_io);
-
-int
-__cv_wait_io_sig(kcondvar_t *cvp, kmutex_t *mp)
-{
-	cv_wait_common(cvp, mp, TASK_INTERRUPTIBLE, 1);
-
-	return (signal_pending(current) ? 0 : 1);
-}
-EXPORT_SYMBOL(__cv_wait_io_sig);
-
-int
-__cv_wait_sig(kcondvar_t *cvp, kmutex_t *mp)
-{
-	cv_wait_common(cvp, mp, TASK_INTERRUPTIBLE, 0);
-
-	return (signal_pending(current) ? 0 : 1);
-}
-EXPORT_SYMBOL(__cv_wait_sig);
-
-#if defined(HAVE_IO_SCHEDULE_TIMEOUT)
-#define	spl_io_schedule_timeout(t)	io_schedule_timeout(t)
-#else
-
-struct spl_task_timer {
-	struct timer_list timer;
-	struct task_struct *task;
-};
-
-static void
-__cv_wakeup(spl_timer_list_t t)
-{
-	struct timer_list *tmr = (struct timer_list *)t;
-	struct spl_task_timer *task_timer = from_timer(task_timer, tmr, timer);
-
-	wake_up_process(task_timer->task);
-}
-
-static long
-spl_io_schedule_timeout(long time_left)
-{
-	long expire_time = jiffies + time_left;
-	struct spl_task_timer task_timer;
-	struct timer_list *timer = &task_timer.timer;
-
-	task_timer.task = current;
-
-	timer_setup(timer, __cv_wakeup, 0);
-
-	timer->expires = expire_time;
-	add_timer(timer);
-
-	io_schedule();
-
-	del_timer_sync(timer);
-
-	time_left = expire_time - jiffies;
-
-	return (time_left < 0 ? 0 : time_left);
-}
-#endif
-
-/*
- * 'expire_time' argument is an absolute wall clock time in jiffies.
- * Return value is time left (expire_time - now) or -1 if timeout occurred.
- */
-static clock_t
-__cv_timedwait_common(kcondvar_t *cvp, kmutex_t *mp, clock_t expire_time,
-    int state, int io)
-{
-	DEFINE_WAIT(wait);
-	kmutex_t *m;
-	clock_t time_left;
-
-	ASSERT(cvp);
-	ASSERT(mp);
-	ASSERT(cvp->cv_magic == CV_MAGIC);
-	ASSERT(mutex_owned(mp));
-
-	/* XXX - Does not handle jiffie wrap properly */
-	time_left = expire_time - jiffies;
-	if (time_left <= 0)
-		return (-1);
-
-	atomic_inc(&cvp->cv_refs);
-	m = READ_ONCE(cvp->cv_mutex);
-	if (!m)
-		m = xchg(&cvp->cv_mutex, mp);
-	/* Ensure the same mutex is used by all callers */
-	ASSERT(m == NULL || m == mp);
-
-	prepare_to_wait_exclusive(&cvp->cv_event, &wait, state);
-	atomic_inc(&cvp->cv_waiters);
-
-	/*
-	 * Mutex should be dropped after prepare_to_wait() this
-	 * ensures we're linked in to the waiters list and avoids the
-	 * race where 'cvp->cv_waiters > 0' but the list is empty.
-	 */
-	mutex_exit(mp);
-	if (io)
-		time_left = spl_io_schedule_timeout(time_left);
-	else
-		time_left = schedule_timeout(time_left);
-
-	/* No more waiters a different mutex could be used */
-	if (atomic_dec_and_test(&cvp->cv_waiters)) {
-		/*
-		 * This is set without any lock, so it's racy. But this is
-		 * just for debug anyway, so make it best-effort
-		 */
-		cvp->cv_mutex = NULL;
-		wake_up(&cvp->cv_destroy);
-	}
-
-	finish_wait(&cvp->cv_event, &wait);
-	atomic_dec(&cvp->cv_refs);
-
-	/*
-	 * Hold mutex after we release the cvp, otherwise we could dead lock
-	 * with a thread holding the mutex and call cv_destroy.
-	 */
-	mutex_enter(mp);
-	return (time_left > 0 ? time_left : -1);
-}
-
-clock_t
-__cv_timedwait(kcondvar_t *cvp, kmutex_t *mp, clock_t exp_time)
-{
-	return (__cv_timedwait_common(cvp, mp, exp_time,
-	    TASK_UNINTERRUPTIBLE, 0));
-}
-EXPORT_SYMBOL(__cv_timedwait);
-
-clock_t
-__cv_timedwait_io(kcondvar_t *cvp, kmutex_t *mp, clock_t exp_time)
-{
-	return (__cv_timedwait_common(cvp, mp, exp_time,
-	    TASK_UNINTERRUPTIBLE, 1));
-}
-EXPORT_SYMBOL(__cv_timedwait_io);
-
-clock_t
-__cv_timedwait_sig(kcondvar_t *cvp, kmutex_t *mp, clock_t exp_time)
-{
-	return (__cv_timedwait_common(cvp, mp, exp_time,
-	    TASK_INTERRUPTIBLE, 0));
-}
-EXPORT_SYMBOL(__cv_timedwait_sig);
-
-/*
- * 'expire_time' argument is an absolute clock time in nanoseconds.
- * Return value is time left (expire_time - now) or -1 if timeout occurred.
- */
-static clock_t
-__cv_timedwait_hires(kcondvar_t *cvp, kmutex_t *mp, hrtime_t expire_time,
-    hrtime_t res, int state)
-{
-	DEFINE_WAIT(wait);
-	kmutex_t *m;
-	hrtime_t time_left;
-	ktime_t ktime_left;
-	u64 slack = 0;
-
-	ASSERT(cvp);
-	ASSERT(mp);
-	ASSERT(cvp->cv_magic == CV_MAGIC);
-	ASSERT(mutex_owned(mp));
-
-	time_left = expire_time - gethrtime();
-	if (time_left <= 0)
-		return (-1);
-
-	atomic_inc(&cvp->cv_refs);
-	m = READ_ONCE(cvp->cv_mutex);
-	if (!m)
-		m = xchg(&cvp->cv_mutex, mp);
-	/* Ensure the same mutex is used by all callers */
-	ASSERT(m == NULL || m == mp);
-
-	prepare_to_wait_exclusive(&cvp->cv_event, &wait, state);
-	atomic_inc(&cvp->cv_waiters);
-
-	/*
-	 * Mutex should be dropped after prepare_to_wait() this
-	 * ensures we're linked in to the waiters list and avoids the
-	 * race where 'cvp->cv_waiters > 0' but the list is empty.
-	 */
-	mutex_exit(mp);
-
-	ktime_left = ktime_set(0, time_left);
-	slack = MIN(MAX(res, spl_schedule_hrtimeout_slack_us * NSEC_PER_USEC),
-	    MAX_HRTIMEOUT_SLACK_US * NSEC_PER_USEC);
-	schedule_hrtimeout_range(&ktime_left, slack, HRTIMER_MODE_REL);
-
-	/* No more waiters a different mutex could be used */
-	if (atomic_dec_and_test(&cvp->cv_waiters)) {
-		/*
-		 * This is set without any lock, so it's racy. But this is
-		 * just for debug anyway, so make it best-effort
-		 */
-		cvp->cv_mutex = NULL;
-		wake_up(&cvp->cv_destroy);
-	}
-
-	finish_wait(&cvp->cv_event, &wait);
-	atomic_dec(&cvp->cv_refs);
-
-	mutex_enter(mp);
-	time_left = expire_time - gethrtime();
-	return (time_left > 0 ? NSEC_TO_TICK(time_left) : -1);
-}
-
-/*
- * Compatibility wrapper for the cv_timedwait_hires() Illumos interface.
- */
-static clock_t
-cv_timedwait_hires_common(kcondvar_t *cvp, kmutex_t *mp, hrtime_t tim,
-    hrtime_t res, int flag, int state)
-{
-	if (!(flag & CALLOUT_FLAG_ABSOLUTE))
-		tim += gethrtime();
-
-	return (__cv_timedwait_hires(cvp, mp, tim, res, state));
-}
-
-clock_t
-cv_timedwait_hires(kcondvar_t *cvp, kmutex_t *mp, hrtime_t tim, hrtime_t res,
-    int flag)
-{
-	return (cv_timedwait_hires_common(cvp, mp, tim, res, flag,
-	    TASK_UNINTERRUPTIBLE));
-}
-EXPORT_SYMBOL(cv_timedwait_hires);
-
-clock_t
-cv_timedwait_sig_hires(kcondvar_t *cvp, kmutex_t *mp, hrtime_t tim,
-    hrtime_t res, int flag)
-{
-	return (cv_timedwait_hires_common(cvp, mp, tim, res, flag,
-	    TASK_INTERRUPTIBLE));
-}
-EXPORT_SYMBOL(cv_timedwait_sig_hires);
-
-void
-__cv_signal(kcondvar_t *cvp)
-{
-	ASSERT(cvp);
-	ASSERT(cvp->cv_magic == CV_MAGIC);
-	atomic_inc(&cvp->cv_refs);
-
-	/*
-	 * All waiters are added with WQ_FLAG_EXCLUSIVE so only one
-	 * waiter will be set runnable with each call to wake_up().
-	 * Additionally wake_up() holds a spin_lock associated with
-	 * the wait queue to ensure we don't race waking up processes.
-	 */
-	if (atomic_read(&cvp->cv_waiters) > 0)
-		wake_up(&cvp->cv_event);
-
-	atomic_dec(&cvp->cv_refs);
-}
-EXPORT_SYMBOL(__cv_signal);
-
-void
-__cv_broadcast(kcondvar_t *cvp)
-{
-	ASSERT(cvp);
-	ASSERT(cvp->cv_magic == CV_MAGIC);
-	atomic_inc(&cvp->cv_refs);
-
-	/*
-	 * Wake_up_all() will wake up all waiters even those which
-	 * have the WQ_FLAG_EXCLUSIVE flag set.
-	 */
-	if (atomic_read(&cvp->cv_waiters) > 0)
-		wake_up_all(&cvp->cv_event);
-
-	atomic_dec(&cvp->cv_refs);
-}
-EXPORT_SYMBOL(__cv_broadcast);