2019-01-18 03:11:00 +08:00
|
|
|
// SPDX-License-Identifier: GPL-2.0+
|
2014-02-05 07:51:41 +08:00
|
|
|
/*
|
|
|
|
* Module-based torture test facility for locking
|
|
|
|
*
|
|
|
|
* Copyright (C) IBM Corporation, 2014
|
|
|
|
*
|
2019-01-18 03:11:00 +08:00
|
|
|
* Authors: Paul E. McKenney <paulmck@linux.ibm.com>
|
2015-07-23 05:07:27 +08:00
|
|
|
* Davidlohr Bueso <dave@stgolabs.net>
|
2014-02-05 07:51:41 +08:00
|
|
|
* Based on kernel/rcu/torture.c.
|
|
|
|
*/
|
2018-05-16 03:25:05 +08:00
|
|
|
|
|
|
|
#define pr_fmt(fmt) fmt
|
|
|
|
|
2014-02-05 07:51:41 +08:00
|
|
|
#include <linux/kernel.h>
|
|
|
|
#include <linux/module.h>
|
|
|
|
#include <linux/kthread.h>
|
2015-07-23 05:07:27 +08:00
|
|
|
#include <linux/sched/rt.h>
|
2014-02-05 07:51:41 +08:00
|
|
|
#include <linux/spinlock.h>
|
2014-09-12 11:40:18 +08:00
|
|
|
#include <linux/mutex.h>
|
2014-09-29 21:14:26 +08:00
|
|
|
#include <linux/rwsem.h>
|
2014-02-05 07:51:41 +08:00
|
|
|
#include <linux/smp.h>
|
|
|
|
#include <linux/interrupt.h>
|
|
|
|
#include <linux/sched.h>
|
2017-02-02 01:07:51 +08:00
|
|
|
#include <uapi/linux/sched/types.h>
|
2017-02-03 17:08:30 +08:00
|
|
|
#include <linux/rtmutex.h>
|
2014-02-05 07:51:41 +08:00
|
|
|
#include <linux/atomic.h>
|
|
|
|
#include <linux/moduleparam.h>
|
|
|
|
#include <linux/delay.h>
|
|
|
|
#include <linux/slab.h>
|
2015-08-30 05:46:29 +08:00
|
|
|
#include <linux/percpu-rwsem.h>
|
2014-02-05 07:51:41 +08:00
|
|
|
#include <linux/torture.h>
|
|
|
|
|
|
|
|
MODULE_LICENSE("GPL");
|
2019-01-18 03:11:00 +08:00
|
|
|
MODULE_AUTHOR("Paul E. McKenney <paulmck@linux.ibm.com>");
|
2014-02-05 07:51:41 +08:00
|
|
|
|
|
|
|
torture_param(int, nwriters_stress, -1,
|
|
|
|
"Number of write-locking stress-test threads");
|
2014-09-12 12:40:41 +08:00
|
|
|
torture_param(int, nreaders_stress, -1,
|
|
|
|
"Number of read-locking stress-test threads");
|
2014-02-05 07:51:41 +08:00
|
|
|
torture_param(int, onoff_holdoff, 0, "Time after boot before CPU hotplugs (s)");
|
|
|
|
torture_param(int, onoff_interval, 0,
|
|
|
|
"Time between CPU hotplugs (s), 0=disable");
|
|
|
|
torture_param(int, shuffle_interval, 3,
|
|
|
|
"Number of jiffies between shuffles, 0=disable");
|
|
|
|
torture_param(int, shutdown_secs, 0, "Shutdown time (j), <= zero to disable.");
|
|
|
|
torture_param(int, stat_interval, 60,
|
|
|
|
"Number of seconds between stats printk()s");
|
|
|
|
torture_param(int, stutter, 5, "Number of jiffies to run/halt test, 0=disable");
|
2018-05-10 01:29:18 +08:00
|
|
|
torture_param(int, verbose, 1,
|
2014-02-05 07:51:41 +08:00
|
|
|
"Enable verbose debugging printk()s");
|
|
|
|
|
|
|
|
static char *torture_type = "spin_lock";
|
|
|
|
module_param(torture_type, charp, 0444);
|
|
|
|
MODULE_PARM_DESC(torture_type,
|
2014-09-12 11:40:18 +08:00
|
|
|
"Type of lock to torture (spin_lock, spin_lock_irq, mutex_lock, ...)");
|
2014-02-05 07:51:41 +08:00
|
|
|
|
|
|
|
static struct task_struct *stats_task;
|
|
|
|
static struct task_struct **writer_tasks;
|
2014-09-12 12:40:41 +08:00
|
|
|
static struct task_struct **reader_tasks;
|
2014-02-05 07:51:41 +08:00
|
|
|
|
|
|
|
static bool lock_is_write_held;
|
2014-09-12 12:40:41 +08:00
|
|
|
static bool lock_is_read_held;
|
2014-02-05 07:51:41 +08:00
|
|
|
|
2014-09-12 11:40:20 +08:00
|
|
|
struct lock_stress_stats {
|
|
|
|
long n_lock_fail;
|
|
|
|
long n_lock_acquired;
|
2014-02-05 07:51:41 +08:00
|
|
|
};
|
|
|
|
|
|
|
|
/* Forward reference. */
|
|
|
|
static void lock_torture_cleanup(void);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Operations vector for selecting different types of tests.
|
|
|
|
*/
|
|
|
|
struct lock_torture_ops {
|
|
|
|
void (*init)(void);
|
|
|
|
int (*writelock)(void);
|
|
|
|
void (*write_delay)(struct torture_random_state *trsp);
|
2015-07-23 05:07:27 +08:00
|
|
|
void (*task_boost)(struct torture_random_state *trsp);
|
2014-02-05 07:51:41 +08:00
|
|
|
void (*writeunlock)(void);
|
2014-09-12 12:40:41 +08:00
|
|
|
int (*readlock)(void);
|
|
|
|
void (*read_delay)(struct torture_random_state *trsp);
|
|
|
|
void (*readunlock)(void);
|
2015-07-23 05:07:27 +08:00
|
|
|
|
|
|
|
unsigned long flags; /* for irq spinlocks */
|
2014-02-05 07:51:41 +08:00
|
|
|
const char *name;
|
|
|
|
};
|
|
|
|
|
2014-09-12 12:42:25 +08:00
|
|
|
struct lock_torture_cxt {
|
|
|
|
int nrealwriters_stress;
|
|
|
|
int nrealreaders_stress;
|
|
|
|
bool debug_lock;
|
|
|
|
atomic_t n_lock_torture_errors;
|
|
|
|
struct lock_torture_ops *cur_ops;
|
|
|
|
struct lock_stress_stats *lwsa; /* writer statistics */
|
|
|
|
struct lock_stress_stats *lrsa; /* reader statistics */
|
|
|
|
};
|
|
|
|
static struct lock_torture_cxt cxt = { 0, 0, false,
|
|
|
|
ATOMIC_INIT(0),
|
|
|
|
NULL, NULL};
|
2014-02-05 07:51:41 +08:00
|
|
|
/*
|
|
|
|
* Definitions for lock torture testing.
|
|
|
|
*/
|
|
|
|
|
2014-02-12 00:05:07 +08:00
|
|
|
static int torture_lock_busted_write_lock(void)
|
|
|
|
{
|
|
|
|
return 0; /* BUGGY, do not use in real life!!! */
|
|
|
|
}
|
|
|
|
|
|
|
|
static void torture_lock_busted_write_delay(struct torture_random_state *trsp)
|
|
|
|
{
|
2015-04-01 23:42:27 +08:00
|
|
|
const unsigned long longdelay_ms = 100;
|
2014-02-12 00:05:07 +08:00
|
|
|
|
|
|
|
/* We want a long delay occasionally to force massive contention. */
|
|
|
|
if (!(torture_random(trsp) %
|
2015-04-01 23:42:27 +08:00
|
|
|
(cxt.nrealwriters_stress * 2000 * longdelay_ms)))
|
|
|
|
mdelay(longdelay_ms);
|
2014-09-12 12:42:25 +08:00
|
|
|
if (!(torture_random(trsp) % (cxt.nrealwriters_stress * 20000)))
|
2017-10-17 02:05:03 +08:00
|
|
|
torture_preempt_schedule(); /* Allow test to be preempted. */
|
2014-02-12 00:05:07 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
static void torture_lock_busted_write_unlock(void)
|
|
|
|
{
|
|
|
|
/* BUGGY, do not use in real life!!! */
|
|
|
|
}
|
|
|
|
|
2015-07-23 05:07:27 +08:00
|
|
|
static void torture_boost_dummy(struct torture_random_state *trsp)
|
|
|
|
{
|
|
|
|
/* Only rtmutexes care about priority */
|
|
|
|
}
|
|
|
|
|
2014-02-12 00:05:07 +08:00
|
|
|
static struct lock_torture_ops lock_busted_ops = {
|
|
|
|
.writelock = torture_lock_busted_write_lock,
|
|
|
|
.write_delay = torture_lock_busted_write_delay,
|
2015-07-23 05:07:27 +08:00
|
|
|
.task_boost = torture_boost_dummy,
|
2014-02-12 00:05:07 +08:00
|
|
|
.writeunlock = torture_lock_busted_write_unlock,
|
2014-09-12 12:40:41 +08:00
|
|
|
.readlock = NULL,
|
|
|
|
.read_delay = NULL,
|
|
|
|
.readunlock = NULL,
|
2014-02-12 00:05:07 +08:00
|
|
|
.name = "lock_busted"
|
|
|
|
};
|
|
|
|
|
2014-02-05 07:51:41 +08:00
|
|
|
static DEFINE_SPINLOCK(torture_spinlock);
|
|
|
|
|
|
|
|
static int torture_spin_lock_write_lock(void) __acquires(torture_spinlock)
|
|
|
|
{
|
|
|
|
spin_lock(&torture_spinlock);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void torture_spin_lock_write_delay(struct torture_random_state *trsp)
|
|
|
|
{
|
|
|
|
const unsigned long shortdelay_us = 2;
|
2015-04-01 23:42:27 +08:00
|
|
|
const unsigned long longdelay_ms = 100;
|
2014-02-05 07:51:41 +08:00
|
|
|
|
|
|
|
/* We want a short delay mostly to emulate likely code, and
|
|
|
|
* we want a long delay occasionally to force massive contention.
|
|
|
|
*/
|
|
|
|
if (!(torture_random(trsp) %
|
2015-04-01 23:42:27 +08:00
|
|
|
(cxt.nrealwriters_stress * 2000 * longdelay_ms)))
|
|
|
|
mdelay(longdelay_ms);
|
2014-02-05 07:51:41 +08:00
|
|
|
if (!(torture_random(trsp) %
|
2014-09-12 12:42:25 +08:00
|
|
|
(cxt.nrealwriters_stress * 2 * shortdelay_us)))
|
2014-02-05 07:51:41 +08:00
|
|
|
udelay(shortdelay_us);
|
2014-09-12 12:42:25 +08:00
|
|
|
if (!(torture_random(trsp) % (cxt.nrealwriters_stress * 20000)))
|
2017-10-17 02:05:03 +08:00
|
|
|
torture_preempt_schedule(); /* Allow test to be preempted. */
|
2014-02-05 07:51:41 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
static void torture_spin_lock_write_unlock(void) __releases(torture_spinlock)
|
|
|
|
{
|
|
|
|
spin_unlock(&torture_spinlock);
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct lock_torture_ops spin_lock_ops = {
|
|
|
|
.writelock = torture_spin_lock_write_lock,
|
|
|
|
.write_delay = torture_spin_lock_write_delay,
|
2015-07-23 05:07:27 +08:00
|
|
|
.task_boost = torture_boost_dummy,
|
2014-02-05 07:51:41 +08:00
|
|
|
.writeunlock = torture_spin_lock_write_unlock,
|
2014-09-12 12:40:41 +08:00
|
|
|
.readlock = NULL,
|
|
|
|
.read_delay = NULL,
|
|
|
|
.readunlock = NULL,
|
2014-02-05 07:51:41 +08:00
|
|
|
.name = "spin_lock"
|
|
|
|
};
|
|
|
|
|
|
|
|
static int torture_spin_lock_write_lock_irq(void)
|
2014-09-29 21:14:24 +08:00
|
|
|
__acquires(torture_spinlock)
|
2014-02-05 07:51:41 +08:00
|
|
|
{
|
|
|
|
unsigned long flags;
|
|
|
|
|
|
|
|
spin_lock_irqsave(&torture_spinlock, flags);
|
2014-09-12 12:42:25 +08:00
|
|
|
cxt.cur_ops->flags = flags;
|
2014-02-05 07:51:41 +08:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void torture_lock_spin_write_unlock_irq(void)
|
|
|
|
__releases(torture_spinlock)
|
|
|
|
{
|
2014-09-12 12:42:25 +08:00
|
|
|
spin_unlock_irqrestore(&torture_spinlock, cxt.cur_ops->flags);
|
2014-02-05 07:51:41 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
static struct lock_torture_ops spin_lock_irq_ops = {
|
|
|
|
.writelock = torture_spin_lock_write_lock_irq,
|
|
|
|
.write_delay = torture_spin_lock_write_delay,
|
2015-07-23 05:07:27 +08:00
|
|
|
.task_boost = torture_boost_dummy,
|
2014-02-05 07:51:41 +08:00
|
|
|
.writeunlock = torture_lock_spin_write_unlock_irq,
|
2014-09-12 12:40:41 +08:00
|
|
|
.readlock = NULL,
|
|
|
|
.read_delay = NULL,
|
|
|
|
.readunlock = NULL,
|
2014-02-05 07:51:41 +08:00
|
|
|
.name = "spin_lock_irq"
|
|
|
|
};
|
|
|
|
|
2014-09-29 21:14:23 +08:00
|
|
|
static DEFINE_RWLOCK(torture_rwlock);
|
|
|
|
|
|
|
|
static int torture_rwlock_write_lock(void) __acquires(torture_rwlock)
|
|
|
|
{
|
|
|
|
write_lock(&torture_rwlock);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void torture_rwlock_write_delay(struct torture_random_state *trsp)
|
|
|
|
{
|
|
|
|
const unsigned long shortdelay_us = 2;
|
|
|
|
const unsigned long longdelay_ms = 100;
|
|
|
|
|
|
|
|
/* We want a short delay mostly to emulate likely code, and
|
|
|
|
* we want a long delay occasionally to force massive contention.
|
|
|
|
*/
|
|
|
|
if (!(torture_random(trsp) %
|
|
|
|
(cxt.nrealwriters_stress * 2000 * longdelay_ms)))
|
|
|
|
mdelay(longdelay_ms);
|
|
|
|
else
|
|
|
|
udelay(shortdelay_us);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void torture_rwlock_write_unlock(void) __releases(torture_rwlock)
|
|
|
|
{
|
|
|
|
write_unlock(&torture_rwlock);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int torture_rwlock_read_lock(void) __acquires(torture_rwlock)
|
|
|
|
{
|
|
|
|
read_lock(&torture_rwlock);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void torture_rwlock_read_delay(struct torture_random_state *trsp)
|
|
|
|
{
|
|
|
|
const unsigned long shortdelay_us = 10;
|
|
|
|
const unsigned long longdelay_ms = 100;
|
|
|
|
|
|
|
|
/* We want a short delay mostly to emulate likely code, and
|
|
|
|
* we want a long delay occasionally to force massive contention.
|
|
|
|
*/
|
|
|
|
if (!(torture_random(trsp) %
|
|
|
|
(cxt.nrealreaders_stress * 2000 * longdelay_ms)))
|
|
|
|
mdelay(longdelay_ms);
|
|
|
|
else
|
|
|
|
udelay(shortdelay_us);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void torture_rwlock_read_unlock(void) __releases(torture_rwlock)
|
|
|
|
{
|
|
|
|
read_unlock(&torture_rwlock);
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct lock_torture_ops rw_lock_ops = {
|
|
|
|
.writelock = torture_rwlock_write_lock,
|
|
|
|
.write_delay = torture_rwlock_write_delay,
|
2015-07-23 05:07:27 +08:00
|
|
|
.task_boost = torture_boost_dummy,
|
2014-09-29 21:14:23 +08:00
|
|
|
.writeunlock = torture_rwlock_write_unlock,
|
|
|
|
.readlock = torture_rwlock_read_lock,
|
|
|
|
.read_delay = torture_rwlock_read_delay,
|
|
|
|
.readunlock = torture_rwlock_read_unlock,
|
|
|
|
.name = "rw_lock"
|
|
|
|
};
|
|
|
|
|
|
|
|
static int torture_rwlock_write_lock_irq(void) __acquires(torture_rwlock)
|
|
|
|
{
|
|
|
|
unsigned long flags;
|
|
|
|
|
|
|
|
write_lock_irqsave(&torture_rwlock, flags);
|
|
|
|
cxt.cur_ops->flags = flags;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void torture_rwlock_write_unlock_irq(void)
|
|
|
|
__releases(torture_rwlock)
|
|
|
|
{
|
|
|
|
write_unlock_irqrestore(&torture_rwlock, cxt.cur_ops->flags);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int torture_rwlock_read_lock_irq(void) __acquires(torture_rwlock)
|
|
|
|
{
|
|
|
|
unsigned long flags;
|
|
|
|
|
|
|
|
read_lock_irqsave(&torture_rwlock, flags);
|
|
|
|
cxt.cur_ops->flags = flags;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void torture_rwlock_read_unlock_irq(void)
|
|
|
|
__releases(torture_rwlock)
|
|
|
|
{
|
2015-03-07 08:06:53 +08:00
|
|
|
read_unlock_irqrestore(&torture_rwlock, cxt.cur_ops->flags);
|
2014-09-29 21:14:23 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
static struct lock_torture_ops rw_lock_irq_ops = {
|
|
|
|
.writelock = torture_rwlock_write_lock_irq,
|
|
|
|
.write_delay = torture_rwlock_write_delay,
|
2015-07-23 05:07:27 +08:00
|
|
|
.task_boost = torture_boost_dummy,
|
2014-09-29 21:14:23 +08:00
|
|
|
.writeunlock = torture_rwlock_write_unlock_irq,
|
|
|
|
.readlock = torture_rwlock_read_lock_irq,
|
|
|
|
.read_delay = torture_rwlock_read_delay,
|
|
|
|
.readunlock = torture_rwlock_read_unlock_irq,
|
|
|
|
.name = "rw_lock_irq"
|
|
|
|
};
|
|
|
|
|
2014-09-12 11:40:18 +08:00
|
|
|
static DEFINE_MUTEX(torture_mutex);
|
|
|
|
|
|
|
|
static int torture_mutex_lock(void) __acquires(torture_mutex)
|
|
|
|
{
|
|
|
|
mutex_lock(&torture_mutex);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void torture_mutex_delay(struct torture_random_state *trsp)
|
|
|
|
{
|
|
|
|
const unsigned long longdelay_ms = 100;
|
|
|
|
|
|
|
|
/* We want a long delay occasionally to force massive contention. */
|
|
|
|
if (!(torture_random(trsp) %
|
2014-09-12 12:42:25 +08:00
|
|
|
(cxt.nrealwriters_stress * 2000 * longdelay_ms)))
|
2014-09-12 11:40:18 +08:00
|
|
|
mdelay(longdelay_ms * 5);
|
|
|
|
else
|
|
|
|
mdelay(longdelay_ms / 5);
|
2014-09-12 12:42:25 +08:00
|
|
|
if (!(torture_random(trsp) % (cxt.nrealwriters_stress * 20000)))
|
2017-10-17 02:05:03 +08:00
|
|
|
torture_preempt_schedule(); /* Allow test to be preempted. */
|
2014-09-12 11:40:18 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
static void torture_mutex_unlock(void) __releases(torture_mutex)
|
|
|
|
{
|
|
|
|
mutex_unlock(&torture_mutex);
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct lock_torture_ops mutex_lock_ops = {
|
|
|
|
.writelock = torture_mutex_lock,
|
|
|
|
.write_delay = torture_mutex_delay,
|
2015-07-23 05:07:27 +08:00
|
|
|
.task_boost = torture_boost_dummy,
|
2014-09-12 11:40:18 +08:00
|
|
|
.writeunlock = torture_mutex_unlock,
|
2014-09-12 12:40:41 +08:00
|
|
|
.readlock = NULL,
|
|
|
|
.read_delay = NULL,
|
|
|
|
.readunlock = NULL,
|
2014-09-12 11:40:18 +08:00
|
|
|
.name = "mutex_lock"
|
|
|
|
};
|
|
|
|
|
2016-12-01 19:47:05 +08:00
|
|
|
#include <linux/ww_mutex.h>
|
2018-06-15 16:17:38 +08:00
|
|
|
static DEFINE_WD_CLASS(torture_ww_class);
|
2016-12-01 19:47:05 +08:00
|
|
|
static DEFINE_WW_MUTEX(torture_ww_mutex_0, &torture_ww_class);
|
|
|
|
static DEFINE_WW_MUTEX(torture_ww_mutex_1, &torture_ww_class);
|
|
|
|
static DEFINE_WW_MUTEX(torture_ww_mutex_2, &torture_ww_class);
|
|
|
|
|
|
|
|
static int torture_ww_mutex_lock(void)
|
|
|
|
__acquires(torture_ww_mutex_0)
|
|
|
|
__acquires(torture_ww_mutex_1)
|
|
|
|
__acquires(torture_ww_mutex_2)
|
|
|
|
{
|
|
|
|
LIST_HEAD(list);
|
|
|
|
struct reorder_lock {
|
|
|
|
struct list_head link;
|
|
|
|
struct ww_mutex *lock;
|
|
|
|
} locks[3], *ll, *ln;
|
|
|
|
struct ww_acquire_ctx ctx;
|
|
|
|
|
|
|
|
locks[0].lock = &torture_ww_mutex_0;
|
|
|
|
list_add(&locks[0].link, &list);
|
|
|
|
|
|
|
|
locks[1].lock = &torture_ww_mutex_1;
|
|
|
|
list_add(&locks[1].link, &list);
|
|
|
|
|
|
|
|
locks[2].lock = &torture_ww_mutex_2;
|
|
|
|
list_add(&locks[2].link, &list);
|
|
|
|
|
|
|
|
ww_acquire_init(&ctx, &torture_ww_class);
|
|
|
|
|
|
|
|
list_for_each_entry(ll, &list, link) {
|
|
|
|
int err;
|
|
|
|
|
|
|
|
err = ww_mutex_lock(ll->lock, &ctx);
|
|
|
|
if (!err)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
ln = ll;
|
|
|
|
list_for_each_entry_continue_reverse(ln, &list, link)
|
|
|
|
ww_mutex_unlock(ln->lock);
|
|
|
|
|
|
|
|
if (err != -EDEADLK)
|
|
|
|
return err;
|
|
|
|
|
|
|
|
ww_mutex_lock_slow(ll->lock, &ctx);
|
|
|
|
list_move(&ll->link, &list);
|
|
|
|
}
|
|
|
|
|
|
|
|
ww_acquire_fini(&ctx);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void torture_ww_mutex_unlock(void)
|
|
|
|
__releases(torture_ww_mutex_0)
|
|
|
|
__releases(torture_ww_mutex_1)
|
|
|
|
__releases(torture_ww_mutex_2)
|
|
|
|
{
|
|
|
|
ww_mutex_unlock(&torture_ww_mutex_0);
|
|
|
|
ww_mutex_unlock(&torture_ww_mutex_1);
|
|
|
|
ww_mutex_unlock(&torture_ww_mutex_2);
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct lock_torture_ops ww_mutex_lock_ops = {
|
|
|
|
.writelock = torture_ww_mutex_lock,
|
|
|
|
.write_delay = torture_mutex_delay,
|
|
|
|
.task_boost = torture_boost_dummy,
|
|
|
|
.writeunlock = torture_ww_mutex_unlock,
|
|
|
|
.readlock = NULL,
|
|
|
|
.read_delay = NULL,
|
|
|
|
.readunlock = NULL,
|
|
|
|
.name = "ww_mutex_lock"
|
|
|
|
};
|
|
|
|
|
2015-07-23 05:07:27 +08:00
|
|
|
#ifdef CONFIG_RT_MUTEXES
|
|
|
|
static DEFINE_RT_MUTEX(torture_rtmutex);
|
|
|
|
|
|
|
|
static int torture_rtmutex_lock(void) __acquires(torture_rtmutex)
|
|
|
|
{
|
|
|
|
rt_mutex_lock(&torture_rtmutex);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void torture_rtmutex_boost(struct torture_random_state *trsp)
|
|
|
|
{
|
|
|
|
int policy;
|
|
|
|
struct sched_param param;
|
|
|
|
const unsigned int factor = 50000; /* yes, quite arbitrary */
|
|
|
|
|
|
|
|
if (!rt_task(current)) {
|
|
|
|
/*
|
2016-04-12 23:47:17 +08:00
|
|
|
* Boost priority once every ~50k operations. When the
|
2015-07-23 05:07:27 +08:00
|
|
|
* task tries to take the lock, the rtmutex it will account
|
|
|
|
* for the new priority, and do any corresponding pi-dance.
|
|
|
|
*/
|
2016-04-12 23:47:17 +08:00
|
|
|
if (trsp && !(torture_random(trsp) %
|
|
|
|
(cxt.nrealwriters_stress * factor))) {
|
2015-07-23 05:07:27 +08:00
|
|
|
policy = SCHED_FIFO;
|
|
|
|
param.sched_priority = MAX_RT_PRIO - 1;
|
|
|
|
} else /* common case, do nothing */
|
|
|
|
return;
|
|
|
|
} else {
|
|
|
|
/*
|
|
|
|
* The task will remain boosted for another ~500k operations,
|
|
|
|
* then restored back to its original prio, and so forth.
|
|
|
|
*
|
|
|
|
* When @trsp is nil, we want to force-reset the task for
|
|
|
|
* stopping the kthread.
|
|
|
|
*/
|
|
|
|
if (!trsp || !(torture_random(trsp) %
|
|
|
|
(cxt.nrealwriters_stress * factor * 2))) {
|
|
|
|
policy = SCHED_NORMAL;
|
|
|
|
param.sched_priority = 0;
|
|
|
|
} else /* common case, do nothing */
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
sched_setscheduler_nocheck(current, policy, ¶m);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void torture_rtmutex_delay(struct torture_random_state *trsp)
|
|
|
|
{
|
|
|
|
const unsigned long shortdelay_us = 2;
|
|
|
|
const unsigned long longdelay_ms = 100;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* We want a short delay mostly to emulate likely code, and
|
|
|
|
* we want a long delay occasionally to force massive contention.
|
|
|
|
*/
|
|
|
|
if (!(torture_random(trsp) %
|
|
|
|
(cxt.nrealwriters_stress * 2000 * longdelay_ms)))
|
|
|
|
mdelay(longdelay_ms);
|
|
|
|
if (!(torture_random(trsp) %
|
|
|
|
(cxt.nrealwriters_stress * 2 * shortdelay_us)))
|
|
|
|
udelay(shortdelay_us);
|
|
|
|
if (!(torture_random(trsp) % (cxt.nrealwriters_stress * 20000)))
|
2017-10-17 02:05:03 +08:00
|
|
|
torture_preempt_schedule(); /* Allow test to be preempted. */
|
2015-07-23 05:07:27 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
static void torture_rtmutex_unlock(void) __releases(torture_rtmutex)
|
|
|
|
{
|
|
|
|
rt_mutex_unlock(&torture_rtmutex);
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct lock_torture_ops rtmutex_lock_ops = {
|
|
|
|
.writelock = torture_rtmutex_lock,
|
|
|
|
.write_delay = torture_rtmutex_delay,
|
|
|
|
.task_boost = torture_rtmutex_boost,
|
|
|
|
.writeunlock = torture_rtmutex_unlock,
|
|
|
|
.readlock = NULL,
|
|
|
|
.read_delay = NULL,
|
|
|
|
.readunlock = NULL,
|
|
|
|
.name = "rtmutex_lock"
|
|
|
|
};
|
|
|
|
#endif
|
|
|
|
|
2014-09-12 12:41:30 +08:00
|
|
|
static DECLARE_RWSEM(torture_rwsem);
|
|
|
|
static int torture_rwsem_down_write(void) __acquires(torture_rwsem)
|
|
|
|
{
|
|
|
|
down_write(&torture_rwsem);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void torture_rwsem_write_delay(struct torture_random_state *trsp)
|
|
|
|
{
|
|
|
|
const unsigned long longdelay_ms = 100;
|
|
|
|
|
|
|
|
/* We want a long delay occasionally to force massive contention. */
|
|
|
|
if (!(torture_random(trsp) %
|
2014-09-12 12:42:25 +08:00
|
|
|
(cxt.nrealwriters_stress * 2000 * longdelay_ms)))
|
2014-09-12 12:41:30 +08:00
|
|
|
mdelay(longdelay_ms * 10);
|
|
|
|
else
|
|
|
|
mdelay(longdelay_ms / 10);
|
2014-09-12 12:42:25 +08:00
|
|
|
if (!(torture_random(trsp) % (cxt.nrealwriters_stress * 20000)))
|
2017-10-17 02:05:03 +08:00
|
|
|
torture_preempt_schedule(); /* Allow test to be preempted. */
|
2014-09-12 12:41:30 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
static void torture_rwsem_up_write(void) __releases(torture_rwsem)
|
|
|
|
{
|
|
|
|
up_write(&torture_rwsem);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int torture_rwsem_down_read(void) __acquires(torture_rwsem)
|
|
|
|
{
|
|
|
|
down_read(&torture_rwsem);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void torture_rwsem_read_delay(struct torture_random_state *trsp)
|
|
|
|
{
|
|
|
|
const unsigned long longdelay_ms = 100;
|
|
|
|
|
|
|
|
/* We want a long delay occasionally to force massive contention. */
|
|
|
|
if (!(torture_random(trsp) %
|
2017-05-15 17:07:22 +08:00
|
|
|
(cxt.nrealreaders_stress * 2000 * longdelay_ms)))
|
2014-09-12 12:41:30 +08:00
|
|
|
mdelay(longdelay_ms * 2);
|
|
|
|
else
|
|
|
|
mdelay(longdelay_ms / 2);
|
2014-09-12 12:42:25 +08:00
|
|
|
if (!(torture_random(trsp) % (cxt.nrealreaders_stress * 20000)))
|
2017-10-17 02:05:03 +08:00
|
|
|
torture_preempt_schedule(); /* Allow test to be preempted. */
|
2014-09-12 12:41:30 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
static void torture_rwsem_up_read(void) __releases(torture_rwsem)
|
|
|
|
{
|
|
|
|
up_read(&torture_rwsem);
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct lock_torture_ops rwsem_lock_ops = {
|
|
|
|
.writelock = torture_rwsem_down_write,
|
|
|
|
.write_delay = torture_rwsem_write_delay,
|
2015-07-23 05:07:27 +08:00
|
|
|
.task_boost = torture_boost_dummy,
|
2014-09-12 12:41:30 +08:00
|
|
|
.writeunlock = torture_rwsem_up_write,
|
|
|
|
.readlock = torture_rwsem_down_read,
|
|
|
|
.read_delay = torture_rwsem_read_delay,
|
|
|
|
.readunlock = torture_rwsem_up_read,
|
|
|
|
.name = "rwsem_lock"
|
|
|
|
};
|
|
|
|
|
2015-08-30 05:46:29 +08:00
|
|
|
#include <linux/percpu-rwsem.h>
|
|
|
|
static struct percpu_rw_semaphore pcpu_rwsem;
|
|
|
|
|
|
|
|
void torture_percpu_rwsem_init(void)
|
|
|
|
{
|
|
|
|
BUG_ON(percpu_init_rwsem(&pcpu_rwsem));
|
|
|
|
}
|
|
|
|
|
|
|
|
static int torture_percpu_rwsem_down_write(void) __acquires(pcpu_rwsem)
|
|
|
|
{
|
|
|
|
percpu_down_write(&pcpu_rwsem);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void torture_percpu_rwsem_up_write(void) __releases(pcpu_rwsem)
|
|
|
|
{
|
|
|
|
percpu_up_write(&pcpu_rwsem);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int torture_percpu_rwsem_down_read(void) __acquires(pcpu_rwsem)
|
|
|
|
{
|
|
|
|
percpu_down_read(&pcpu_rwsem);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void torture_percpu_rwsem_up_read(void) __releases(pcpu_rwsem)
|
|
|
|
{
|
|
|
|
percpu_up_read(&pcpu_rwsem);
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct lock_torture_ops percpu_rwsem_lock_ops = {
|
|
|
|
.init = torture_percpu_rwsem_init,
|
|
|
|
.writelock = torture_percpu_rwsem_down_write,
|
|
|
|
.write_delay = torture_rwsem_write_delay,
|
|
|
|
.task_boost = torture_boost_dummy,
|
|
|
|
.writeunlock = torture_percpu_rwsem_up_write,
|
|
|
|
.readlock = torture_percpu_rwsem_down_read,
|
|
|
|
.read_delay = torture_rwsem_read_delay,
|
|
|
|
.readunlock = torture_percpu_rwsem_up_read,
|
|
|
|
.name = "percpu_rwsem_lock"
|
|
|
|
};
|
|
|
|
|
2014-02-05 07:51:41 +08:00
|
|
|
/*
|
|
|
|
* Lock torture writer kthread. Repeatedly acquires and releases
|
|
|
|
* the lock, checking for duplicate acquisitions.
|
|
|
|
*/
|
|
|
|
static int lock_torture_writer(void *arg)
|
|
|
|
{
|
2014-09-12 11:40:20 +08:00
|
|
|
struct lock_stress_stats *lwsp = arg;
|
2020-01-25 04:58:15 +08:00
|
|
|
DEFINE_TORTURE_RANDOM(rand);
|
2014-02-05 07:51:41 +08:00
|
|
|
|
|
|
|
VERBOSE_TOROUT_STRING("lock_torture_writer task started");
|
2014-03-11 18:09:12 +08:00
|
|
|
set_user_nice(current, MAX_NICE);
|
2014-02-05 07:51:41 +08:00
|
|
|
|
|
|
|
do {
|
2014-02-27 04:14:51 +08:00
|
|
|
if ((torture_random(&rand) & 0xfffff) == 0)
|
|
|
|
schedule_timeout_uninterruptible(1);
|
2014-09-29 21:14:25 +08:00
|
|
|
|
2015-07-23 05:07:27 +08:00
|
|
|
cxt.cur_ops->task_boost(&rand);
|
2014-09-12 12:42:25 +08:00
|
|
|
cxt.cur_ops->writelock();
|
2014-02-05 07:51:41 +08:00
|
|
|
if (WARN_ON_ONCE(lock_is_write_held))
|
2014-09-12 11:40:20 +08:00
|
|
|
lwsp->n_lock_fail++;
|
2020-04-13 20:02:59 +08:00
|
|
|
lock_is_write_held = true;
|
2014-09-29 21:14:25 +08:00
|
|
|
if (WARN_ON_ONCE(lock_is_read_held))
|
|
|
|
lwsp->n_lock_fail++; /* rare, but... */
|
|
|
|
|
2014-09-12 11:40:20 +08:00
|
|
|
lwsp->n_lock_acquired++;
|
2014-09-12 12:42:25 +08:00
|
|
|
cxt.cur_ops->write_delay(&rand);
|
2020-04-13 20:02:59 +08:00
|
|
|
lock_is_write_held = false;
|
2014-09-12 12:42:25 +08:00
|
|
|
cxt.cur_ops->writeunlock();
|
2014-09-29 21:14:25 +08:00
|
|
|
|
2014-02-05 07:51:41 +08:00
|
|
|
stutter_wait("lock_torture_writer");
|
|
|
|
} while (!torture_must_stop());
|
2015-07-23 05:07:27 +08:00
|
|
|
|
|
|
|
cxt.cur_ops->task_boost(NULL); /* reset prio */
|
2014-02-05 07:51:41 +08:00
|
|
|
torture_kthread_stopping("lock_torture_writer");
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2014-09-12 12:40:41 +08:00
|
|
|
/*
|
|
|
|
* Lock torture reader kthread. Repeatedly acquires and releases
|
|
|
|
* the reader lock.
|
|
|
|
*/
|
|
|
|
static int lock_torture_reader(void *arg)
|
|
|
|
{
|
|
|
|
struct lock_stress_stats *lrsp = arg;
|
2020-01-25 04:58:15 +08:00
|
|
|
DEFINE_TORTURE_RANDOM(rand);
|
2014-09-12 12:40:41 +08:00
|
|
|
|
|
|
|
VERBOSE_TOROUT_STRING("lock_torture_reader task started");
|
|
|
|
set_user_nice(current, MAX_NICE);
|
|
|
|
|
|
|
|
do {
|
|
|
|
if ((torture_random(&rand) & 0xfffff) == 0)
|
|
|
|
schedule_timeout_uninterruptible(1);
|
2014-09-29 21:14:25 +08:00
|
|
|
|
2014-09-12 12:42:25 +08:00
|
|
|
cxt.cur_ops->readlock();
|
2020-04-13 20:02:59 +08:00
|
|
|
lock_is_read_held = true;
|
2014-09-29 21:14:25 +08:00
|
|
|
if (WARN_ON_ONCE(lock_is_write_held))
|
|
|
|
lrsp->n_lock_fail++; /* rare, but... */
|
|
|
|
|
2014-09-12 12:40:41 +08:00
|
|
|
lrsp->n_lock_acquired++;
|
2014-09-12 12:42:25 +08:00
|
|
|
cxt.cur_ops->read_delay(&rand);
|
2020-04-13 20:02:59 +08:00
|
|
|
lock_is_read_held = false;
|
2014-09-12 12:42:25 +08:00
|
|
|
cxt.cur_ops->readunlock();
|
2014-09-29 21:14:25 +08:00
|
|
|
|
2014-09-12 12:40:41 +08:00
|
|
|
stutter_wait("lock_torture_reader");
|
|
|
|
} while (!torture_must_stop());
|
|
|
|
torture_kthread_stopping("lock_torture_reader");
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2014-02-05 07:51:41 +08:00
|
|
|
/*
|
|
|
|
* Create an lock-torture-statistics message in the specified buffer.
|
|
|
|
*/
|
2014-09-12 12:40:41 +08:00
|
|
|
static void __torture_print_stats(char *page,
|
|
|
|
struct lock_stress_stats *statp, bool write)
|
2014-02-05 07:51:41 +08:00
|
|
|
{
|
2020-04-13 20:02:59 +08:00
|
|
|
bool fail = false;
|
2014-09-12 12:40:41 +08:00
|
|
|
int i, n_stress;
|
2017-05-15 17:07:23 +08:00
|
|
|
long max = 0, min = statp ? statp[0].n_lock_acquired : 0;
|
2014-02-05 07:51:41 +08:00
|
|
|
long long sum = 0;
|
|
|
|
|
2014-09-12 12:42:25 +08:00
|
|
|
n_stress = write ? cxt.nrealwriters_stress : cxt.nrealreaders_stress;
|
2014-09-12 12:40:41 +08:00
|
|
|
for (i = 0; i < n_stress; i++) {
|
|
|
|
if (statp[i].n_lock_fail)
|
2014-02-05 07:51:41 +08:00
|
|
|
fail = true;
|
2014-09-12 12:40:41 +08:00
|
|
|
sum += statp[i].n_lock_acquired;
|
2020-01-24 01:19:01 +08:00
|
|
|
if (max < statp[i].n_lock_acquired)
|
|
|
|
max = statp[i].n_lock_acquired;
|
|
|
|
if (min > statp[i].n_lock_acquired)
|
|
|
|
min = statp[i].n_lock_acquired;
|
2014-02-05 07:51:41 +08:00
|
|
|
}
|
|
|
|
page += sprintf(page,
|
2014-09-12 12:40:41 +08:00
|
|
|
"%s: Total: %lld Max/Min: %ld/%ld %s Fail: %d %s\n",
|
|
|
|
write ? "Writes" : "Reads ",
|
2020-01-31 12:37:04 +08:00
|
|
|
sum, max, min,
|
|
|
|
!onoff_interval && max / 2 > min ? "???" : "",
|
2014-02-05 07:51:41 +08:00
|
|
|
fail, fail ? "!!!" : "");
|
|
|
|
if (fail)
|
2014-09-12 12:42:25 +08:00
|
|
|
atomic_inc(&cxt.n_lock_torture_errors);
|
2014-02-05 07:51:41 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Print torture statistics. Caller must ensure that there is only one
|
|
|
|
* call to this function at a given time!!! This is normally accomplished
|
|
|
|
* by relying on the module system to only have one copy of the module
|
|
|
|
* loaded, and then by giving the lock_torture_stats kthread full control
|
|
|
|
* (or the init/cleanup functions when lock_torture_stats thread is not
|
|
|
|
* running).
|
|
|
|
*/
|
|
|
|
static void lock_torture_stats_print(void)
|
|
|
|
{
|
2014-09-12 12:42:25 +08:00
|
|
|
int size = cxt.nrealwriters_stress * 200 + 8192;
|
2014-02-05 07:51:41 +08:00
|
|
|
char *buf;
|
|
|
|
|
2014-09-12 12:42:25 +08:00
|
|
|
if (cxt.cur_ops->readlock)
|
|
|
|
size += cxt.nrealreaders_stress * 200 + 8192;
|
2014-09-12 12:40:41 +08:00
|
|
|
|
2014-02-05 07:51:41 +08:00
|
|
|
buf = kmalloc(size, GFP_KERNEL);
|
|
|
|
if (!buf) {
|
|
|
|
pr_err("lock_torture_stats_print: Out of memory, need: %d",
|
|
|
|
size);
|
|
|
|
return;
|
|
|
|
}
|
2014-09-12 12:40:41 +08:00
|
|
|
|
2014-09-12 12:42:25 +08:00
|
|
|
__torture_print_stats(buf, cxt.lwsa, true);
|
2014-02-05 07:51:41 +08:00
|
|
|
pr_alert("%s", buf);
|
|
|
|
kfree(buf);
|
2014-09-12 12:40:41 +08:00
|
|
|
|
2014-09-12 12:42:25 +08:00
|
|
|
if (cxt.cur_ops->readlock) {
|
2014-09-12 12:40:41 +08:00
|
|
|
buf = kmalloc(size, GFP_KERNEL);
|
|
|
|
if (!buf) {
|
|
|
|
pr_err("lock_torture_stats_print: Out of memory, need: %d",
|
|
|
|
size);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
2014-09-12 12:42:25 +08:00
|
|
|
__torture_print_stats(buf, cxt.lrsa, false);
|
2014-09-12 12:40:41 +08:00
|
|
|
pr_alert("%s", buf);
|
|
|
|
kfree(buf);
|
|
|
|
}
|
2014-02-05 07:51:41 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Periodically prints torture statistics, if periodic statistics printing
|
|
|
|
* was specified via the stat_interval module parameter.
|
|
|
|
*
|
|
|
|
* No need to worry about fullstop here, since this one doesn't reference
|
|
|
|
* volatile state or register callbacks.
|
|
|
|
*/
|
|
|
|
static int lock_torture_stats(void *arg)
|
|
|
|
{
|
|
|
|
VERBOSE_TOROUT_STRING("lock_torture_stats task started");
|
|
|
|
do {
|
|
|
|
schedule_timeout_interruptible(stat_interval * HZ);
|
|
|
|
lock_torture_stats_print();
|
|
|
|
torture_shutdown_absorb("lock_torture_stats");
|
|
|
|
} while (!torture_must_stop());
|
|
|
|
torture_kthread_stopping("lock_torture_stats");
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline void
|
|
|
|
lock_torture_print_module_parms(struct lock_torture_ops *cur_ops,
|
|
|
|
const char *tag)
|
|
|
|
{
|
|
|
|
pr_alert("%s" TORTURE_FLAG
|
2014-09-12 12:40:41 +08:00
|
|
|
"--- %s%s: nwriters_stress=%d nreaders_stress=%d stat_interval=%d verbose=%d shuffle_interval=%d stutter=%d shutdown_secs=%d onoff_interval=%d onoff_holdoff=%d\n",
|
2014-09-12 12:42:25 +08:00
|
|
|
torture_type, tag, cxt.debug_lock ? " [debug]": "",
|
|
|
|
cxt.nrealwriters_stress, cxt.nrealreaders_stress, stat_interval,
|
2014-09-12 12:40:41 +08:00
|
|
|
verbose, shuffle_interval, stutter, shutdown_secs,
|
2014-02-05 07:51:41 +08:00
|
|
|
onoff_interval, onoff_holdoff);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void lock_torture_cleanup(void)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
|
2014-09-12 11:40:21 +08:00
|
|
|
if (torture_cleanup_begin())
|
2014-02-05 07:51:41 +08:00
|
|
|
return;
|
|
|
|
|
2016-04-12 23:47:18 +08:00
|
|
|
/*
|
|
|
|
* Indicates early cleanup, meaning that the test has not run,
|
|
|
|
* such as when passing bogus args when loading the module. As
|
|
|
|
* such, only perform the underlying torture-specific cleanups,
|
|
|
|
* and avoid anything related to locktorture.
|
|
|
|
*/
|
2017-05-15 17:07:23 +08:00
|
|
|
if (!cxt.lwsa && !cxt.lrsa)
|
2016-04-12 23:47:18 +08:00
|
|
|
goto end;
|
|
|
|
|
2014-02-05 07:51:41 +08:00
|
|
|
if (writer_tasks) {
|
2014-09-12 12:42:25 +08:00
|
|
|
for (i = 0; i < cxt.nrealwriters_stress; i++)
|
2014-02-05 07:51:41 +08:00
|
|
|
torture_stop_kthread(lock_torture_writer,
|
|
|
|
writer_tasks[i]);
|
|
|
|
kfree(writer_tasks);
|
|
|
|
writer_tasks = NULL;
|
|
|
|
}
|
|
|
|
|
2014-09-12 12:40:41 +08:00
|
|
|
if (reader_tasks) {
|
2014-09-12 12:42:25 +08:00
|
|
|
for (i = 0; i < cxt.nrealreaders_stress; i++)
|
2014-09-12 12:40:41 +08:00
|
|
|
torture_stop_kthread(lock_torture_reader,
|
|
|
|
reader_tasks[i]);
|
|
|
|
kfree(reader_tasks);
|
|
|
|
reader_tasks = NULL;
|
|
|
|
}
|
|
|
|
|
2014-02-05 07:51:41 +08:00
|
|
|
torture_stop_kthread(lock_torture_stats, stats_task);
|
|
|
|
lock_torture_stats_print(); /* -After- the stats thread is stopped! */
|
|
|
|
|
2014-09-12 12:42:25 +08:00
|
|
|
if (atomic_read(&cxt.n_lock_torture_errors))
|
|
|
|
lock_torture_print_module_parms(cxt.cur_ops,
|
2014-02-05 07:51:41 +08:00
|
|
|
"End of test: FAILURE");
|
|
|
|
else if (torture_onoff_failures())
|
2014-09-12 12:42:25 +08:00
|
|
|
lock_torture_print_module_parms(cxt.cur_ops,
|
2014-02-05 07:51:41 +08:00
|
|
|
"End of test: LOCK_HOTPLUG");
|
|
|
|
else
|
2014-09-12 12:42:25 +08:00
|
|
|
lock_torture_print_module_parms(cxt.cur_ops,
|
2014-02-05 07:51:41 +08:00
|
|
|
"End of test: SUCCESS");
|
2016-11-11 05:06:39 +08:00
|
|
|
|
|
|
|
kfree(cxt.lwsa);
|
2019-03-22 04:30:01 +08:00
|
|
|
cxt.lwsa = NULL;
|
2016-11-11 05:06:39 +08:00
|
|
|
kfree(cxt.lrsa);
|
2019-03-22 04:30:01 +08:00
|
|
|
cxt.lrsa = NULL;
|
2016-11-11 05:06:39 +08:00
|
|
|
|
2016-04-12 23:47:18 +08:00
|
|
|
end:
|
2014-09-12 11:40:21 +08:00
|
|
|
torture_cleanup_end();
|
2014-02-05 07:51:41 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
static int __init lock_torture_init(void)
|
|
|
|
{
|
2014-09-12 12:40:41 +08:00
|
|
|
int i, j;
|
2014-02-05 07:51:41 +08:00
|
|
|
int firsterr = 0;
|
|
|
|
static struct lock_torture_ops *torture_ops[] = {
|
2014-09-29 21:14:23 +08:00
|
|
|
&lock_busted_ops,
|
|
|
|
&spin_lock_ops, &spin_lock_irq_ops,
|
|
|
|
&rw_lock_ops, &rw_lock_irq_ops,
|
|
|
|
&mutex_lock_ops,
|
2016-12-01 19:47:05 +08:00
|
|
|
&ww_mutex_lock_ops,
|
2015-07-23 05:07:27 +08:00
|
|
|
#ifdef CONFIG_RT_MUTEXES
|
|
|
|
&rtmutex_lock_ops,
|
|
|
|
#endif
|
2014-09-29 21:14:23 +08:00
|
|
|
&rwsem_lock_ops,
|
2015-08-30 05:46:29 +08:00
|
|
|
&percpu_rwsem_lock_ops,
|
2014-02-05 07:51:41 +08:00
|
|
|
};
|
|
|
|
|
2017-11-22 12:19:17 +08:00
|
|
|
if (!torture_init_begin(torture_type, verbose))
|
2014-04-08 00:14:11 +08:00
|
|
|
return -EBUSY;
|
2014-02-05 07:51:41 +08:00
|
|
|
|
|
|
|
/* Process args and tell the world that the torturer is on the job. */
|
|
|
|
for (i = 0; i < ARRAY_SIZE(torture_ops); i++) {
|
2014-09-12 12:42:25 +08:00
|
|
|
cxt.cur_ops = torture_ops[i];
|
|
|
|
if (strcmp(torture_type, cxt.cur_ops->name) == 0)
|
2014-02-05 07:51:41 +08:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
if (i == ARRAY_SIZE(torture_ops)) {
|
|
|
|
pr_alert("lock-torture: invalid torture type: \"%s\"\n",
|
|
|
|
torture_type);
|
|
|
|
pr_alert("lock-torture types:");
|
|
|
|
for (i = 0; i < ARRAY_SIZE(torture_ops); i++)
|
|
|
|
pr_alert(" %s", torture_ops[i]->name);
|
|
|
|
pr_alert("\n");
|
2015-08-31 11:01:48 +08:00
|
|
|
firsterr = -EINVAL;
|
|
|
|
goto unwind;
|
2014-02-05 07:51:41 +08:00
|
|
|
}
|
2017-05-15 17:07:23 +08:00
|
|
|
|
|
|
|
if (nwriters_stress == 0 && nreaders_stress == 0) {
|
|
|
|
pr_alert("lock-torture: must run at least one locking thread\n");
|
|
|
|
firsterr = -EINVAL;
|
|
|
|
goto unwind;
|
|
|
|
}
|
|
|
|
|
2014-09-12 12:42:25 +08:00
|
|
|
if (cxt.cur_ops->init)
|
2015-08-31 11:01:48 +08:00
|
|
|
cxt.cur_ops->init();
|
2014-02-05 07:51:41 +08:00
|
|
|
|
|
|
|
if (nwriters_stress >= 0)
|
2014-09-12 12:42:25 +08:00
|
|
|
cxt.nrealwriters_stress = nwriters_stress;
|
2014-02-05 07:51:41 +08:00
|
|
|
else
|
2014-09-12 12:42:25 +08:00
|
|
|
cxt.nrealwriters_stress = 2 * num_online_cpus();
|
2014-09-12 11:40:19 +08:00
|
|
|
|
|
|
|
#ifdef CONFIG_DEBUG_MUTEXES
|
2019-08-02 09:46:56 +08:00
|
|
|
if (str_has_prefix(torture_type, "mutex"))
|
2014-09-12 12:42:25 +08:00
|
|
|
cxt.debug_lock = true;
|
2014-09-12 11:40:19 +08:00
|
|
|
#endif
|
2015-07-23 05:07:27 +08:00
|
|
|
#ifdef CONFIG_DEBUG_RT_MUTEXES
|
2019-08-02 09:46:56 +08:00
|
|
|
if (str_has_prefix(torture_type, "rtmutex"))
|
2015-07-23 05:07:27 +08:00
|
|
|
cxt.debug_lock = true;
|
|
|
|
#endif
|
2014-09-12 11:40:19 +08:00
|
|
|
#ifdef CONFIG_DEBUG_SPINLOCK
|
2019-08-02 09:46:56 +08:00
|
|
|
if ((str_has_prefix(torture_type, "spin")) ||
|
|
|
|
(str_has_prefix(torture_type, "rw_lock")))
|
2014-09-12 12:42:25 +08:00
|
|
|
cxt.debug_lock = true;
|
2014-09-12 11:40:19 +08:00
|
|
|
#endif
|
2014-02-05 07:51:41 +08:00
|
|
|
|
|
|
|
/* Initialize the statistics so that each run gets its own numbers. */
|
2017-05-15 17:07:23 +08:00
|
|
|
if (nwriters_stress) {
|
2020-04-13 20:02:59 +08:00
|
|
|
lock_is_write_held = false;
|
treewide: kmalloc() -> kmalloc_array()
The kmalloc() function has a 2-factor argument form, kmalloc_array(). This
patch replaces cases of:
kmalloc(a * b, gfp)
with:
kmalloc_array(a * b, gfp)
as well as handling cases of:
kmalloc(a * b * c, gfp)
with:
kmalloc(array3_size(a, b, c), gfp)
as it's slightly less ugly than:
kmalloc_array(array_size(a, b), c, gfp)
This does, however, attempt to ignore constant size factors like:
kmalloc(4 * 1024, gfp)
though any constants defined via macros get caught up in the conversion.
Any factors with a sizeof() of "unsigned char", "char", and "u8" were
dropped, since they're redundant.
The tools/ directory was manually excluded, since it has its own
implementation of kmalloc().
The Coccinelle script used for this was:
// Fix redundant parens around sizeof().
@@
type TYPE;
expression THING, E;
@@
(
kmalloc(
- (sizeof(TYPE)) * E
+ sizeof(TYPE) * E
, ...)
|
kmalloc(
- (sizeof(THING)) * E
+ sizeof(THING) * E
, ...)
)
// Drop single-byte sizes and redundant parens.
@@
expression COUNT;
typedef u8;
typedef __u8;
@@
(
kmalloc(
- sizeof(u8) * (COUNT)
+ COUNT
, ...)
|
kmalloc(
- sizeof(__u8) * (COUNT)
+ COUNT
, ...)
|
kmalloc(
- sizeof(char) * (COUNT)
+ COUNT
, ...)
|
kmalloc(
- sizeof(unsigned char) * (COUNT)
+ COUNT
, ...)
|
kmalloc(
- sizeof(u8) * COUNT
+ COUNT
, ...)
|
kmalloc(
- sizeof(__u8) * COUNT
+ COUNT
, ...)
|
kmalloc(
- sizeof(char) * COUNT
+ COUNT
, ...)
|
kmalloc(
- sizeof(unsigned char) * COUNT
+ COUNT
, ...)
)
// 2-factor product with sizeof(type/expression) and identifier or constant.
@@
type TYPE;
expression THING;
identifier COUNT_ID;
constant COUNT_CONST;
@@
(
- kmalloc
+ kmalloc_array
(
- sizeof(TYPE) * (COUNT_ID)
+ COUNT_ID, sizeof(TYPE)
, ...)
|
- kmalloc
+ kmalloc_array
(
- sizeof(TYPE) * COUNT_ID
+ COUNT_ID, sizeof(TYPE)
, ...)
|
- kmalloc
+ kmalloc_array
(
- sizeof(TYPE) * (COUNT_CONST)
+ COUNT_CONST, sizeof(TYPE)
, ...)
|
- kmalloc
+ kmalloc_array
(
- sizeof(TYPE) * COUNT_CONST
+ COUNT_CONST, sizeof(TYPE)
, ...)
|
- kmalloc
+ kmalloc_array
(
- sizeof(THING) * (COUNT_ID)
+ COUNT_ID, sizeof(THING)
, ...)
|
- kmalloc
+ kmalloc_array
(
- sizeof(THING) * COUNT_ID
+ COUNT_ID, sizeof(THING)
, ...)
|
- kmalloc
+ kmalloc_array
(
- sizeof(THING) * (COUNT_CONST)
+ COUNT_CONST, sizeof(THING)
, ...)
|
- kmalloc
+ kmalloc_array
(
- sizeof(THING) * COUNT_CONST
+ COUNT_CONST, sizeof(THING)
, ...)
)
// 2-factor product, only identifiers.
@@
identifier SIZE, COUNT;
@@
- kmalloc
+ kmalloc_array
(
- SIZE * COUNT
+ COUNT, SIZE
, ...)
// 3-factor product with 1 sizeof(type) or sizeof(expression), with
// redundant parens removed.
@@
expression THING;
identifier STRIDE, COUNT;
type TYPE;
@@
(
kmalloc(
- sizeof(TYPE) * (COUNT) * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
kmalloc(
- sizeof(TYPE) * (COUNT) * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
kmalloc(
- sizeof(TYPE) * COUNT * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
kmalloc(
- sizeof(TYPE) * COUNT * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
kmalloc(
- sizeof(THING) * (COUNT) * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
|
kmalloc(
- sizeof(THING) * (COUNT) * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
|
kmalloc(
- sizeof(THING) * COUNT * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
|
kmalloc(
- sizeof(THING) * COUNT * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
)
// 3-factor product with 2 sizeof(variable), with redundant parens removed.
@@
expression THING1, THING2;
identifier COUNT;
type TYPE1, TYPE2;
@@
(
kmalloc(
- sizeof(TYPE1) * sizeof(TYPE2) * COUNT
+ array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
, ...)
|
kmalloc(
- sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
, ...)
|
kmalloc(
- sizeof(THING1) * sizeof(THING2) * COUNT
+ array3_size(COUNT, sizeof(THING1), sizeof(THING2))
, ...)
|
kmalloc(
- sizeof(THING1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(THING1), sizeof(THING2))
, ...)
|
kmalloc(
- sizeof(TYPE1) * sizeof(THING2) * COUNT
+ array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
, ...)
|
kmalloc(
- sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
, ...)
)
// 3-factor product, only identifiers, with redundant parens removed.
@@
identifier STRIDE, SIZE, COUNT;
@@
(
kmalloc(
- (COUNT) * STRIDE * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kmalloc(
- COUNT * (STRIDE) * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kmalloc(
- COUNT * STRIDE * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kmalloc(
- (COUNT) * (STRIDE) * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kmalloc(
- COUNT * (STRIDE) * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kmalloc(
- (COUNT) * STRIDE * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kmalloc(
- (COUNT) * (STRIDE) * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kmalloc(
- COUNT * STRIDE * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
)
// Any remaining multi-factor products, first at least 3-factor products,
// when they're not all constants...
@@
expression E1, E2, E3;
constant C1, C2, C3;
@@
(
kmalloc(C1 * C2 * C3, ...)
|
kmalloc(
- (E1) * E2 * E3
+ array3_size(E1, E2, E3)
, ...)
|
kmalloc(
- (E1) * (E2) * E3
+ array3_size(E1, E2, E3)
, ...)
|
kmalloc(
- (E1) * (E2) * (E3)
+ array3_size(E1, E2, E3)
, ...)
|
kmalloc(
- E1 * E2 * E3
+ array3_size(E1, E2, E3)
, ...)
)
// And then all remaining 2 factors products when they're not all constants,
// keeping sizeof() as the second factor argument.
@@
expression THING, E1, E2;
type TYPE;
constant C1, C2, C3;
@@
(
kmalloc(sizeof(THING) * C2, ...)
|
kmalloc(sizeof(TYPE) * C2, ...)
|
kmalloc(C1 * C2 * C3, ...)
|
kmalloc(C1 * C2, ...)
|
- kmalloc
+ kmalloc_array
(
- sizeof(TYPE) * (E2)
+ E2, sizeof(TYPE)
, ...)
|
- kmalloc
+ kmalloc_array
(
- sizeof(TYPE) * E2
+ E2, sizeof(TYPE)
, ...)
|
- kmalloc
+ kmalloc_array
(
- sizeof(THING) * (E2)
+ E2, sizeof(THING)
, ...)
|
- kmalloc
+ kmalloc_array
(
- sizeof(THING) * E2
+ E2, sizeof(THING)
, ...)
|
- kmalloc
+ kmalloc_array
(
- (E1) * E2
+ E1, E2
, ...)
|
- kmalloc
+ kmalloc_array
(
- (E1) * (E2)
+ E1, E2
, ...)
|
- kmalloc
+ kmalloc_array
(
- E1 * E2
+ E1, E2
, ...)
)
Signed-off-by: Kees Cook <keescook@chromium.org>
2018-06-13 04:55:00 +08:00
|
|
|
cxt.lwsa = kmalloc_array(cxt.nrealwriters_stress,
|
|
|
|
sizeof(*cxt.lwsa),
|
|
|
|
GFP_KERNEL);
|
2017-05-15 17:07:23 +08:00
|
|
|
if (cxt.lwsa == NULL) {
|
|
|
|
VERBOSE_TOROUT_STRING("cxt.lwsa: Out of memory");
|
|
|
|
firsterr = -ENOMEM;
|
|
|
|
goto unwind;
|
|
|
|
}
|
2014-02-05 07:51:41 +08:00
|
|
|
|
2017-05-15 17:07:23 +08:00
|
|
|
for (i = 0; i < cxt.nrealwriters_stress; i++) {
|
|
|
|
cxt.lwsa[i].n_lock_fail = 0;
|
|
|
|
cxt.lwsa[i].n_lock_acquired = 0;
|
|
|
|
}
|
2014-02-05 07:51:41 +08:00
|
|
|
}
|
|
|
|
|
2014-09-12 12:42:25 +08:00
|
|
|
if (cxt.cur_ops->readlock) {
|
2014-09-12 12:40:41 +08:00
|
|
|
if (nreaders_stress >= 0)
|
2014-09-12 12:42:25 +08:00
|
|
|
cxt.nrealreaders_stress = nreaders_stress;
|
2014-09-12 12:40:41 +08:00
|
|
|
else {
|
|
|
|
/*
|
|
|
|
* By default distribute evenly the number of
|
|
|
|
* readers and writers. We still run the same number
|
|
|
|
* of threads as the writer-only locks default.
|
|
|
|
*/
|
|
|
|
if (nwriters_stress < 0) /* user doesn't care */
|
2014-09-12 12:42:25 +08:00
|
|
|
cxt.nrealwriters_stress = num_online_cpus();
|
|
|
|
cxt.nrealreaders_stress = cxt.nrealwriters_stress;
|
2014-09-12 12:40:41 +08:00
|
|
|
}
|
|
|
|
|
2017-05-15 17:07:23 +08:00
|
|
|
if (nreaders_stress) {
|
2020-04-13 20:02:59 +08:00
|
|
|
lock_is_read_held = false;
|
treewide: kmalloc() -> kmalloc_array()
The kmalloc() function has a 2-factor argument form, kmalloc_array(). This
patch replaces cases of:
kmalloc(a * b, gfp)
with:
kmalloc_array(a * b, gfp)
as well as handling cases of:
kmalloc(a * b * c, gfp)
with:
kmalloc(array3_size(a, b, c), gfp)
as it's slightly less ugly than:
kmalloc_array(array_size(a, b), c, gfp)
This does, however, attempt to ignore constant size factors like:
kmalloc(4 * 1024, gfp)
though any constants defined via macros get caught up in the conversion.
Any factors with a sizeof() of "unsigned char", "char", and "u8" were
dropped, since they're redundant.
The tools/ directory was manually excluded, since it has its own
implementation of kmalloc().
The Coccinelle script used for this was:
// Fix redundant parens around sizeof().
@@
type TYPE;
expression THING, E;
@@
(
kmalloc(
- (sizeof(TYPE)) * E
+ sizeof(TYPE) * E
, ...)
|
kmalloc(
- (sizeof(THING)) * E
+ sizeof(THING) * E
, ...)
)
// Drop single-byte sizes and redundant parens.
@@
expression COUNT;
typedef u8;
typedef __u8;
@@
(
kmalloc(
- sizeof(u8) * (COUNT)
+ COUNT
, ...)
|
kmalloc(
- sizeof(__u8) * (COUNT)
+ COUNT
, ...)
|
kmalloc(
- sizeof(char) * (COUNT)
+ COUNT
, ...)
|
kmalloc(
- sizeof(unsigned char) * (COUNT)
+ COUNT
, ...)
|
kmalloc(
- sizeof(u8) * COUNT
+ COUNT
, ...)
|
kmalloc(
- sizeof(__u8) * COUNT
+ COUNT
, ...)
|
kmalloc(
- sizeof(char) * COUNT
+ COUNT
, ...)
|
kmalloc(
- sizeof(unsigned char) * COUNT
+ COUNT
, ...)
)
// 2-factor product with sizeof(type/expression) and identifier or constant.
@@
type TYPE;
expression THING;
identifier COUNT_ID;
constant COUNT_CONST;
@@
(
- kmalloc
+ kmalloc_array
(
- sizeof(TYPE) * (COUNT_ID)
+ COUNT_ID, sizeof(TYPE)
, ...)
|
- kmalloc
+ kmalloc_array
(
- sizeof(TYPE) * COUNT_ID
+ COUNT_ID, sizeof(TYPE)
, ...)
|
- kmalloc
+ kmalloc_array
(
- sizeof(TYPE) * (COUNT_CONST)
+ COUNT_CONST, sizeof(TYPE)
, ...)
|
- kmalloc
+ kmalloc_array
(
- sizeof(TYPE) * COUNT_CONST
+ COUNT_CONST, sizeof(TYPE)
, ...)
|
- kmalloc
+ kmalloc_array
(
- sizeof(THING) * (COUNT_ID)
+ COUNT_ID, sizeof(THING)
, ...)
|
- kmalloc
+ kmalloc_array
(
- sizeof(THING) * COUNT_ID
+ COUNT_ID, sizeof(THING)
, ...)
|
- kmalloc
+ kmalloc_array
(
- sizeof(THING) * (COUNT_CONST)
+ COUNT_CONST, sizeof(THING)
, ...)
|
- kmalloc
+ kmalloc_array
(
- sizeof(THING) * COUNT_CONST
+ COUNT_CONST, sizeof(THING)
, ...)
)
// 2-factor product, only identifiers.
@@
identifier SIZE, COUNT;
@@
- kmalloc
+ kmalloc_array
(
- SIZE * COUNT
+ COUNT, SIZE
, ...)
// 3-factor product with 1 sizeof(type) or sizeof(expression), with
// redundant parens removed.
@@
expression THING;
identifier STRIDE, COUNT;
type TYPE;
@@
(
kmalloc(
- sizeof(TYPE) * (COUNT) * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
kmalloc(
- sizeof(TYPE) * (COUNT) * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
kmalloc(
- sizeof(TYPE) * COUNT * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
kmalloc(
- sizeof(TYPE) * COUNT * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
kmalloc(
- sizeof(THING) * (COUNT) * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
|
kmalloc(
- sizeof(THING) * (COUNT) * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
|
kmalloc(
- sizeof(THING) * COUNT * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
|
kmalloc(
- sizeof(THING) * COUNT * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
)
// 3-factor product with 2 sizeof(variable), with redundant parens removed.
@@
expression THING1, THING2;
identifier COUNT;
type TYPE1, TYPE2;
@@
(
kmalloc(
- sizeof(TYPE1) * sizeof(TYPE2) * COUNT
+ array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
, ...)
|
kmalloc(
- sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
, ...)
|
kmalloc(
- sizeof(THING1) * sizeof(THING2) * COUNT
+ array3_size(COUNT, sizeof(THING1), sizeof(THING2))
, ...)
|
kmalloc(
- sizeof(THING1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(THING1), sizeof(THING2))
, ...)
|
kmalloc(
- sizeof(TYPE1) * sizeof(THING2) * COUNT
+ array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
, ...)
|
kmalloc(
- sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
, ...)
)
// 3-factor product, only identifiers, with redundant parens removed.
@@
identifier STRIDE, SIZE, COUNT;
@@
(
kmalloc(
- (COUNT) * STRIDE * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kmalloc(
- COUNT * (STRIDE) * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kmalloc(
- COUNT * STRIDE * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kmalloc(
- (COUNT) * (STRIDE) * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kmalloc(
- COUNT * (STRIDE) * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kmalloc(
- (COUNT) * STRIDE * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kmalloc(
- (COUNT) * (STRIDE) * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kmalloc(
- COUNT * STRIDE * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
)
// Any remaining multi-factor products, first at least 3-factor products,
// when they're not all constants...
@@
expression E1, E2, E3;
constant C1, C2, C3;
@@
(
kmalloc(C1 * C2 * C3, ...)
|
kmalloc(
- (E1) * E2 * E3
+ array3_size(E1, E2, E3)
, ...)
|
kmalloc(
- (E1) * (E2) * E3
+ array3_size(E1, E2, E3)
, ...)
|
kmalloc(
- (E1) * (E2) * (E3)
+ array3_size(E1, E2, E3)
, ...)
|
kmalloc(
- E1 * E2 * E3
+ array3_size(E1, E2, E3)
, ...)
)
// And then all remaining 2 factors products when they're not all constants,
// keeping sizeof() as the second factor argument.
@@
expression THING, E1, E2;
type TYPE;
constant C1, C2, C3;
@@
(
kmalloc(sizeof(THING) * C2, ...)
|
kmalloc(sizeof(TYPE) * C2, ...)
|
kmalloc(C1 * C2 * C3, ...)
|
kmalloc(C1 * C2, ...)
|
- kmalloc
+ kmalloc_array
(
- sizeof(TYPE) * (E2)
+ E2, sizeof(TYPE)
, ...)
|
- kmalloc
+ kmalloc_array
(
- sizeof(TYPE) * E2
+ E2, sizeof(TYPE)
, ...)
|
- kmalloc
+ kmalloc_array
(
- sizeof(THING) * (E2)
+ E2, sizeof(THING)
, ...)
|
- kmalloc
+ kmalloc_array
(
- sizeof(THING) * E2
+ E2, sizeof(THING)
, ...)
|
- kmalloc
+ kmalloc_array
(
- (E1) * E2
+ E1, E2
, ...)
|
- kmalloc
+ kmalloc_array
(
- (E1) * (E2)
+ E1, E2
, ...)
|
- kmalloc
+ kmalloc_array
(
- E1 * E2
+ E1, E2
, ...)
)
Signed-off-by: Kees Cook <keescook@chromium.org>
2018-06-13 04:55:00 +08:00
|
|
|
cxt.lrsa = kmalloc_array(cxt.nrealreaders_stress,
|
|
|
|
sizeof(*cxt.lrsa),
|
|
|
|
GFP_KERNEL);
|
2017-05-15 17:07:23 +08:00
|
|
|
if (cxt.lrsa == NULL) {
|
|
|
|
VERBOSE_TOROUT_STRING("cxt.lrsa: Out of memory");
|
|
|
|
firsterr = -ENOMEM;
|
|
|
|
kfree(cxt.lwsa);
|
|
|
|
cxt.lwsa = NULL;
|
|
|
|
goto unwind;
|
|
|
|
}
|
|
|
|
|
|
|
|
for (i = 0; i < cxt.nrealreaders_stress; i++) {
|
|
|
|
cxt.lrsa[i].n_lock_fail = 0;
|
|
|
|
cxt.lrsa[i].n_lock_acquired = 0;
|
|
|
|
}
|
2014-09-12 12:40:41 +08:00
|
|
|
}
|
|
|
|
}
|
2016-04-12 23:47:18 +08:00
|
|
|
|
2014-09-12 12:42:25 +08:00
|
|
|
lock_torture_print_module_parms(cxt.cur_ops, "Start of test");
|
2014-09-12 12:40:41 +08:00
|
|
|
|
|
|
|
/* Prepare torture context. */
|
2014-02-05 07:51:41 +08:00
|
|
|
if (onoff_interval > 0) {
|
|
|
|
firsterr = torture_onoff_init(onoff_holdoff * HZ,
|
2018-12-11 01:44:52 +08:00
|
|
|
onoff_interval * HZ, NULL);
|
2014-02-05 07:51:41 +08:00
|
|
|
if (firsterr)
|
|
|
|
goto unwind;
|
|
|
|
}
|
|
|
|
if (shuffle_interval > 0) {
|
|
|
|
firsterr = torture_shuffle_init(shuffle_interval);
|
|
|
|
if (firsterr)
|
|
|
|
goto unwind;
|
|
|
|
}
|
|
|
|
if (shutdown_secs > 0) {
|
|
|
|
firsterr = torture_shutdown_init(shutdown_secs,
|
|
|
|
lock_torture_cleanup);
|
|
|
|
if (firsterr)
|
|
|
|
goto unwind;
|
|
|
|
}
|
|
|
|
if (stutter > 0) {
|
2019-04-10 05:44:49 +08:00
|
|
|
firsterr = torture_stutter_init(stutter, stutter);
|
2014-02-05 07:51:41 +08:00
|
|
|
if (firsterr)
|
|
|
|
goto unwind;
|
|
|
|
}
|
|
|
|
|
2017-05-15 17:07:23 +08:00
|
|
|
if (nwriters_stress) {
|
treewide: kzalloc() -> kcalloc()
The kzalloc() function has a 2-factor argument form, kcalloc(). This
patch replaces cases of:
kzalloc(a * b, gfp)
with:
kcalloc(a * b, gfp)
as well as handling cases of:
kzalloc(a * b * c, gfp)
with:
kzalloc(array3_size(a, b, c), gfp)
as it's slightly less ugly than:
kzalloc_array(array_size(a, b), c, gfp)
This does, however, attempt to ignore constant size factors like:
kzalloc(4 * 1024, gfp)
though any constants defined via macros get caught up in the conversion.
Any factors with a sizeof() of "unsigned char", "char", and "u8" were
dropped, since they're redundant.
The Coccinelle script used for this was:
// Fix redundant parens around sizeof().
@@
type TYPE;
expression THING, E;
@@
(
kzalloc(
- (sizeof(TYPE)) * E
+ sizeof(TYPE) * E
, ...)
|
kzalloc(
- (sizeof(THING)) * E
+ sizeof(THING) * E
, ...)
)
// Drop single-byte sizes and redundant parens.
@@
expression COUNT;
typedef u8;
typedef __u8;
@@
(
kzalloc(
- sizeof(u8) * (COUNT)
+ COUNT
, ...)
|
kzalloc(
- sizeof(__u8) * (COUNT)
+ COUNT
, ...)
|
kzalloc(
- sizeof(char) * (COUNT)
+ COUNT
, ...)
|
kzalloc(
- sizeof(unsigned char) * (COUNT)
+ COUNT
, ...)
|
kzalloc(
- sizeof(u8) * COUNT
+ COUNT
, ...)
|
kzalloc(
- sizeof(__u8) * COUNT
+ COUNT
, ...)
|
kzalloc(
- sizeof(char) * COUNT
+ COUNT
, ...)
|
kzalloc(
- sizeof(unsigned char) * COUNT
+ COUNT
, ...)
)
// 2-factor product with sizeof(type/expression) and identifier or constant.
@@
type TYPE;
expression THING;
identifier COUNT_ID;
constant COUNT_CONST;
@@
(
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * (COUNT_ID)
+ COUNT_ID, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * COUNT_ID
+ COUNT_ID, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * (COUNT_CONST)
+ COUNT_CONST, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * COUNT_CONST
+ COUNT_CONST, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * (COUNT_ID)
+ COUNT_ID, sizeof(THING)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * COUNT_ID
+ COUNT_ID, sizeof(THING)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * (COUNT_CONST)
+ COUNT_CONST, sizeof(THING)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * COUNT_CONST
+ COUNT_CONST, sizeof(THING)
, ...)
)
// 2-factor product, only identifiers.
@@
identifier SIZE, COUNT;
@@
- kzalloc
+ kcalloc
(
- SIZE * COUNT
+ COUNT, SIZE
, ...)
// 3-factor product with 1 sizeof(type) or sizeof(expression), with
// redundant parens removed.
@@
expression THING;
identifier STRIDE, COUNT;
type TYPE;
@@
(
kzalloc(
- sizeof(TYPE) * (COUNT) * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
kzalloc(
- sizeof(TYPE) * (COUNT) * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
kzalloc(
- sizeof(TYPE) * COUNT * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
kzalloc(
- sizeof(TYPE) * COUNT * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
kzalloc(
- sizeof(THING) * (COUNT) * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
|
kzalloc(
- sizeof(THING) * (COUNT) * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
|
kzalloc(
- sizeof(THING) * COUNT * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
|
kzalloc(
- sizeof(THING) * COUNT * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
)
// 3-factor product with 2 sizeof(variable), with redundant parens removed.
@@
expression THING1, THING2;
identifier COUNT;
type TYPE1, TYPE2;
@@
(
kzalloc(
- sizeof(TYPE1) * sizeof(TYPE2) * COUNT
+ array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
, ...)
|
kzalloc(
- sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
, ...)
|
kzalloc(
- sizeof(THING1) * sizeof(THING2) * COUNT
+ array3_size(COUNT, sizeof(THING1), sizeof(THING2))
, ...)
|
kzalloc(
- sizeof(THING1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(THING1), sizeof(THING2))
, ...)
|
kzalloc(
- sizeof(TYPE1) * sizeof(THING2) * COUNT
+ array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
, ...)
|
kzalloc(
- sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
, ...)
)
// 3-factor product, only identifiers, with redundant parens removed.
@@
identifier STRIDE, SIZE, COUNT;
@@
(
kzalloc(
- (COUNT) * STRIDE * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- COUNT * (STRIDE) * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- COUNT * STRIDE * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- (COUNT) * (STRIDE) * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- COUNT * (STRIDE) * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- (COUNT) * STRIDE * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- (COUNT) * (STRIDE) * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- COUNT * STRIDE * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
)
// Any remaining multi-factor products, first at least 3-factor products,
// when they're not all constants...
@@
expression E1, E2, E3;
constant C1, C2, C3;
@@
(
kzalloc(C1 * C2 * C3, ...)
|
kzalloc(
- (E1) * E2 * E3
+ array3_size(E1, E2, E3)
, ...)
|
kzalloc(
- (E1) * (E2) * E3
+ array3_size(E1, E2, E3)
, ...)
|
kzalloc(
- (E1) * (E2) * (E3)
+ array3_size(E1, E2, E3)
, ...)
|
kzalloc(
- E1 * E2 * E3
+ array3_size(E1, E2, E3)
, ...)
)
// And then all remaining 2 factors products when they're not all constants,
// keeping sizeof() as the second factor argument.
@@
expression THING, E1, E2;
type TYPE;
constant C1, C2, C3;
@@
(
kzalloc(sizeof(THING) * C2, ...)
|
kzalloc(sizeof(TYPE) * C2, ...)
|
kzalloc(C1 * C2 * C3, ...)
|
kzalloc(C1 * C2, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * (E2)
+ E2, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * E2
+ E2, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * (E2)
+ E2, sizeof(THING)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * E2
+ E2, sizeof(THING)
, ...)
|
- kzalloc
+ kcalloc
(
- (E1) * E2
+ E1, E2
, ...)
|
- kzalloc
+ kcalloc
(
- (E1) * (E2)
+ E1, E2
, ...)
|
- kzalloc
+ kcalloc
(
- E1 * E2
+ E1, E2
, ...)
)
Signed-off-by: Kees Cook <keescook@chromium.org>
2018-06-13 05:03:40 +08:00
|
|
|
writer_tasks = kcalloc(cxt.nrealwriters_stress,
|
|
|
|
sizeof(writer_tasks[0]),
|
2017-05-15 17:07:23 +08:00
|
|
|
GFP_KERNEL);
|
|
|
|
if (writer_tasks == NULL) {
|
|
|
|
VERBOSE_TOROUT_ERRSTRING("writer_tasks: Out of memory");
|
|
|
|
firsterr = -ENOMEM;
|
|
|
|
goto unwind;
|
|
|
|
}
|
2014-02-05 07:51:41 +08:00
|
|
|
}
|
2014-09-12 12:40:41 +08:00
|
|
|
|
2014-09-12 12:42:25 +08:00
|
|
|
if (cxt.cur_ops->readlock) {
|
treewide: kzalloc() -> kcalloc()
The kzalloc() function has a 2-factor argument form, kcalloc(). This
patch replaces cases of:
kzalloc(a * b, gfp)
with:
kcalloc(a * b, gfp)
as well as handling cases of:
kzalloc(a * b * c, gfp)
with:
kzalloc(array3_size(a, b, c), gfp)
as it's slightly less ugly than:
kzalloc_array(array_size(a, b), c, gfp)
This does, however, attempt to ignore constant size factors like:
kzalloc(4 * 1024, gfp)
though any constants defined via macros get caught up in the conversion.
Any factors with a sizeof() of "unsigned char", "char", and "u8" were
dropped, since they're redundant.
The Coccinelle script used for this was:
// Fix redundant parens around sizeof().
@@
type TYPE;
expression THING, E;
@@
(
kzalloc(
- (sizeof(TYPE)) * E
+ sizeof(TYPE) * E
, ...)
|
kzalloc(
- (sizeof(THING)) * E
+ sizeof(THING) * E
, ...)
)
// Drop single-byte sizes and redundant parens.
@@
expression COUNT;
typedef u8;
typedef __u8;
@@
(
kzalloc(
- sizeof(u8) * (COUNT)
+ COUNT
, ...)
|
kzalloc(
- sizeof(__u8) * (COUNT)
+ COUNT
, ...)
|
kzalloc(
- sizeof(char) * (COUNT)
+ COUNT
, ...)
|
kzalloc(
- sizeof(unsigned char) * (COUNT)
+ COUNT
, ...)
|
kzalloc(
- sizeof(u8) * COUNT
+ COUNT
, ...)
|
kzalloc(
- sizeof(__u8) * COUNT
+ COUNT
, ...)
|
kzalloc(
- sizeof(char) * COUNT
+ COUNT
, ...)
|
kzalloc(
- sizeof(unsigned char) * COUNT
+ COUNT
, ...)
)
// 2-factor product with sizeof(type/expression) and identifier or constant.
@@
type TYPE;
expression THING;
identifier COUNT_ID;
constant COUNT_CONST;
@@
(
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * (COUNT_ID)
+ COUNT_ID, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * COUNT_ID
+ COUNT_ID, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * (COUNT_CONST)
+ COUNT_CONST, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * COUNT_CONST
+ COUNT_CONST, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * (COUNT_ID)
+ COUNT_ID, sizeof(THING)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * COUNT_ID
+ COUNT_ID, sizeof(THING)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * (COUNT_CONST)
+ COUNT_CONST, sizeof(THING)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * COUNT_CONST
+ COUNT_CONST, sizeof(THING)
, ...)
)
// 2-factor product, only identifiers.
@@
identifier SIZE, COUNT;
@@
- kzalloc
+ kcalloc
(
- SIZE * COUNT
+ COUNT, SIZE
, ...)
// 3-factor product with 1 sizeof(type) or sizeof(expression), with
// redundant parens removed.
@@
expression THING;
identifier STRIDE, COUNT;
type TYPE;
@@
(
kzalloc(
- sizeof(TYPE) * (COUNT) * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
kzalloc(
- sizeof(TYPE) * (COUNT) * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
kzalloc(
- sizeof(TYPE) * COUNT * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
kzalloc(
- sizeof(TYPE) * COUNT * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
kzalloc(
- sizeof(THING) * (COUNT) * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
|
kzalloc(
- sizeof(THING) * (COUNT) * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
|
kzalloc(
- sizeof(THING) * COUNT * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
|
kzalloc(
- sizeof(THING) * COUNT * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
)
// 3-factor product with 2 sizeof(variable), with redundant parens removed.
@@
expression THING1, THING2;
identifier COUNT;
type TYPE1, TYPE2;
@@
(
kzalloc(
- sizeof(TYPE1) * sizeof(TYPE2) * COUNT
+ array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
, ...)
|
kzalloc(
- sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
, ...)
|
kzalloc(
- sizeof(THING1) * sizeof(THING2) * COUNT
+ array3_size(COUNT, sizeof(THING1), sizeof(THING2))
, ...)
|
kzalloc(
- sizeof(THING1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(THING1), sizeof(THING2))
, ...)
|
kzalloc(
- sizeof(TYPE1) * sizeof(THING2) * COUNT
+ array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
, ...)
|
kzalloc(
- sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
, ...)
)
// 3-factor product, only identifiers, with redundant parens removed.
@@
identifier STRIDE, SIZE, COUNT;
@@
(
kzalloc(
- (COUNT) * STRIDE * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- COUNT * (STRIDE) * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- COUNT * STRIDE * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- (COUNT) * (STRIDE) * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- COUNT * (STRIDE) * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- (COUNT) * STRIDE * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- (COUNT) * (STRIDE) * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- COUNT * STRIDE * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
)
// Any remaining multi-factor products, first at least 3-factor products,
// when they're not all constants...
@@
expression E1, E2, E3;
constant C1, C2, C3;
@@
(
kzalloc(C1 * C2 * C3, ...)
|
kzalloc(
- (E1) * E2 * E3
+ array3_size(E1, E2, E3)
, ...)
|
kzalloc(
- (E1) * (E2) * E3
+ array3_size(E1, E2, E3)
, ...)
|
kzalloc(
- (E1) * (E2) * (E3)
+ array3_size(E1, E2, E3)
, ...)
|
kzalloc(
- E1 * E2 * E3
+ array3_size(E1, E2, E3)
, ...)
)
// And then all remaining 2 factors products when they're not all constants,
// keeping sizeof() as the second factor argument.
@@
expression THING, E1, E2;
type TYPE;
constant C1, C2, C3;
@@
(
kzalloc(sizeof(THING) * C2, ...)
|
kzalloc(sizeof(TYPE) * C2, ...)
|
kzalloc(C1 * C2 * C3, ...)
|
kzalloc(C1 * C2, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * (E2)
+ E2, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * E2
+ E2, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * (E2)
+ E2, sizeof(THING)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * E2
+ E2, sizeof(THING)
, ...)
|
- kzalloc
+ kcalloc
(
- (E1) * E2
+ E1, E2
, ...)
|
- kzalloc
+ kcalloc
(
- (E1) * (E2)
+ E1, E2
, ...)
|
- kzalloc
+ kcalloc
(
- E1 * E2
+ E1, E2
, ...)
)
Signed-off-by: Kees Cook <keescook@chromium.org>
2018-06-13 05:03:40 +08:00
|
|
|
reader_tasks = kcalloc(cxt.nrealreaders_stress,
|
|
|
|
sizeof(reader_tasks[0]),
|
2014-09-12 12:40:41 +08:00
|
|
|
GFP_KERNEL);
|
|
|
|
if (reader_tasks == NULL) {
|
|
|
|
VERBOSE_TOROUT_ERRSTRING("reader_tasks: Out of memory");
|
2016-11-11 05:06:39 +08:00
|
|
|
kfree(writer_tasks);
|
|
|
|
writer_tasks = NULL;
|
2014-09-12 12:40:41 +08:00
|
|
|
firsterr = -ENOMEM;
|
|
|
|
goto unwind;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Create the kthreads and start torturing (oh, those poor little locks).
|
|
|
|
*
|
|
|
|
* TODO: Note that we interleave writers with readers, giving writers a
|
|
|
|
* slight advantage, by creating its kthread first. This can be modified
|
|
|
|
* for very specific needs, or even let the user choose the policy, if
|
|
|
|
* ever wanted.
|
|
|
|
*/
|
2014-09-12 12:42:25 +08:00
|
|
|
for (i = 0, j = 0; i < cxt.nrealwriters_stress ||
|
|
|
|
j < cxt.nrealreaders_stress; i++, j++) {
|
|
|
|
if (i >= cxt.nrealwriters_stress)
|
2014-09-12 12:40:41 +08:00
|
|
|
goto create_reader;
|
|
|
|
|
|
|
|
/* Create writer. */
|
2014-09-12 12:42:25 +08:00
|
|
|
firsterr = torture_create_kthread(lock_torture_writer, &cxt.lwsa[i],
|
2014-02-05 07:51:41 +08:00
|
|
|
writer_tasks[i]);
|
|
|
|
if (firsterr)
|
|
|
|
goto unwind;
|
2014-09-12 12:40:41 +08:00
|
|
|
|
|
|
|
create_reader:
|
2014-09-12 12:42:25 +08:00
|
|
|
if (cxt.cur_ops->readlock == NULL || (j >= cxt.nrealreaders_stress))
|
2014-09-12 12:40:41 +08:00
|
|
|
continue;
|
|
|
|
/* Create reader. */
|
2014-09-12 12:42:25 +08:00
|
|
|
firsterr = torture_create_kthread(lock_torture_reader, &cxt.lrsa[j],
|
2014-09-12 12:40:41 +08:00
|
|
|
reader_tasks[j]);
|
|
|
|
if (firsterr)
|
|
|
|
goto unwind;
|
2014-02-05 07:51:41 +08:00
|
|
|
}
|
|
|
|
if (stat_interval > 0) {
|
|
|
|
firsterr = torture_create_kthread(lock_torture_stats, NULL,
|
|
|
|
stats_task);
|
|
|
|
if (firsterr)
|
|
|
|
goto unwind;
|
|
|
|
}
|
|
|
|
torture_init_end();
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
unwind:
|
|
|
|
torture_init_end();
|
|
|
|
lock_torture_cleanup();
|
|
|
|
return firsterr;
|
|
|
|
}
|
|
|
|
|
|
|
|
module_init(lock_torture_init);
|
|
|
|
module_exit(lock_torture_cleanup);
|