[deliverable/linux.git] / kernel / time / timer_list.c

/*
 * kernel/time/timer_list.c
 *
 * List pending timers
 *
 * Copyright(C) 2006, Red Hat, Inc., Ingo Molnar
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/proc_fs.h>
#include <linux/module.h>
#include <linux/spinlock.h>
#include <linux/sched.h>
#include <linux/seq_file.h>
#include <linux/kallsyms.h>
#include <linux/tick.h>

#include <asm/uaccess.h>


struct timer_list_iter {
	int cpu;
	bool second_pass;
	u64 now;
};

typedef void (*print_fn_t)(struct seq_file *m, unsigned int *classes);

DECLARE_PER_CPU(struct hrtimer_cpu_base, hrtimer_bases);

/*
 * This allows printing both to /proc/timer_list and
 * to the console (on SysRq-Q):
 */
#define SEQ_printf(m, x...)			\
 do {						\
	if (m)					\
		seq_printf(m, x);		\
	else					\
		printk(x);			\
 } while (0)

static void print_name_offset(struct seq_file *m, void *sym)
{
	char symname[KSYM_NAME_LEN];

	if (lookup_symbol_name((unsigned long)sym, symname) < 0)
		SEQ_printf(m, "<%pK>", sym);
	else
		SEQ_printf(m, "%s", symname);
}

static void
print_timer(struct seq_file *m, struct hrtimer *taddr, struct hrtimer *timer,
	    int idx, u64 now)
{
#ifdef CONFIG_TIMER_STATS
	char tmp[TASK_COMM_LEN + 1];
#endif
	SEQ_printf(m, " #%d: ", idx);
	print_name_offset(m, taddr);
	SEQ_printf(m, ", ");
	print_name_offset(m, timer->function);
	SEQ_printf(m, ", S:%02lx", timer->state);
#ifdef CONFIG_TIMER_STATS
	SEQ_printf(m, ", ");
	print_name_offset(m, timer->start_site);
	memcpy(tmp, timer->start_comm, TASK_COMM_LEN);
	tmp[TASK_COMM_LEN] = 0;
	SEQ_printf(m, ", %s/%d", tmp, timer->start_pid);
#endif
	SEQ_printf(m, "\n");
	SEQ_printf(m, " # expires at %Lu-%Lu nsecs [in %Ld to %Ld nsecs]\n",
		(unsigned long long)ktime_to_ns(hrtimer_get_softexpires(timer)),
		(unsigned long long)ktime_to_ns(hrtimer_get_expires(timer)),
		(long long)(ktime_to_ns(hrtimer_get_softexpires(timer)) - now),
		(long long)(ktime_to_ns(hrtimer_get_expires(timer)) - now));
}

static void
print_active_timers(struct seq_file *m, struct hrtimer_clock_base *base,
		    u64 now)
{
	struct hrtimer *timer, tmp;
	unsigned long next = 0, i;
	struct timerqueue_node *curr;
	unsigned long flags;

next_one:
	i = 0;
	raw_spin_lock_irqsave(&base->cpu_base->lock, flags);

	curr = timerqueue_getnext(&base->active);
	/*
	 * Crude but we have to do this O(N*N) thing, because
	 * we have to unlock the base when printing:
	 */
	while (curr && i < next) {
		curr = timerqueue_iterate_next(curr);
		i++;
	}

	if (curr) {

		timer = container_of(curr, struct hrtimer, node);
		tmp = *timer;
		raw_spin_unlock_irqrestore(&base->cpu_base->lock, flags);

		print_timer(m, timer, &tmp, i, now);
		next++;
		goto next_one;
	}
	raw_spin_unlock_irqrestore(&base->cpu_base->lock, flags);
}

static void
print_base(struct seq_file *m, struct hrtimer_clock_base *base, u64 now)
{
	SEQ_printf(m, "  .base:       %pK\n", base);
	SEQ_printf(m, "  .index:      %d\n",
			base->index);
	SEQ_printf(m, "  .resolution: %Lu nsecs\n",
			(unsigned long long)ktime_to_ns(base->resolution));
	SEQ_printf(m,   "  .get_time:   ");
	print_name_offset(m, base->get_time);
	SEQ_printf(m,   "\n");
#ifdef CONFIG_HIGH_RES_TIMERS
	SEQ_printf(m, "  .offset:     %Lu nsecs\n",
		   (unsigned long long) ktime_to_ns(base->offset));
#endif
	SEQ_printf(m,   "active timers:\n");
	print_active_timers(m, base, now);
}

static void print_cpu(struct seq_file *m, int cpu, u64 now)
{
	struct hrtimer_cpu_base *cpu_base = &per_cpu(hrtimer_bases, cpu);
	int i;

	SEQ_printf(m, "cpu: %d\n", cpu);
	for (i = 0; i < HRTIMER_MAX_CLOCK_BASES; i++) {
		SEQ_printf(m, " clock %d:\n", i);
		print_base(m, cpu_base->clock_base + i, now);
	}
#define P(x) \
	SEQ_printf(m, "  .%-15s: %Lu\n", #x, \
		   (unsigned long long)(cpu_base->x))
#define P_ns(x) \
	SEQ_printf(m, "  .%-15s: %Lu nsecs\n", #x, \
		   (unsigned long long)(ktime_to_ns(cpu_base->x)))

#ifdef CONFIG_HIGH_RES_TIMERS
	P_ns(expires_next);
	P(hres_active);
	P(nr_events);
	P(nr_retries);
	P(nr_hangs);
	P_ns(max_hang_time);
#endif
#undef P
#undef P_ns

#ifdef CONFIG_TICK_ONESHOT
# define P(x) \
	SEQ_printf(m, "  .%-15s: %Lu\n", #x, \
		   (unsigned long long)(ts->x))
# define P_ns(x) \
	SEQ_printf(m, "  .%-15s: %Lu nsecs\n", #x, \
		   (unsigned long long)(ktime_to_ns(ts->x)))
	{
		struct tick_sched *ts = tick_get_tick_sched(cpu);
		P(nohz_mode);
		P_ns(last_tick);
		P(tick_stopped);
		P(idle_jiffies);
		P(idle_calls);
		P(idle_sleeps);
		P_ns(idle_entrytime);
		P_ns(idle_waketime);
		P_ns(idle_exittime);
		P_ns(idle_sleeptime);
		P_ns(iowait_sleeptime);
		P(last_jiffies);
		P(next_jiffies);
		P_ns(idle_expires);
		SEQ_printf(m, "jiffies: %Lu\n",
			   (unsigned long long)jiffies);
	}
#endif

#undef P
#undef P_ns
	SEQ_printf(m, "\n");
}

#ifdef CONFIG_GENERIC_CLOCKEVENTS
static void
print_tickdevice(struct seq_file *m, struct tick_device *td, int cpu)
{
	struct clock_event_device *dev = td->evtdev;

	SEQ_printf(m, "Tick Device: mode:     %d\n", td->mode);
	if (cpu < 0)
		SEQ_printf(m, "Broadcast device\n");
	else
		SEQ_printf(m, "Per CPU device: %d\n", cpu);

	SEQ_printf(m, "Clock Event Device: ");
	if (!dev) {
		SEQ_printf(m, "<NULL>\n");
		return;
	}
	SEQ_printf(m, "%s\n", dev->name);
	SEQ_printf(m, " max_delta_ns:   %llu\n",
		   (unsigned long long) dev->max_delta_ns);
	SEQ_printf(m, " min_delta_ns:   %llu\n",
		   (unsigned long long) dev->min_delta_ns);
	SEQ_printf(m, " mult:           %u\n", dev->mult);
	SEQ_printf(m, " shift:          %u\n", dev->shift);
	SEQ_printf(m, " mode:           %d\n", dev->mode);
	SEQ_printf(m, " next_event:     %Ld nsecs\n",
		   (unsigned long long) ktime_to_ns(dev->next_event));

	SEQ_printf(m, " set_next_event: ");
	print_name_offset(m, dev->set_next_event);
	SEQ_printf(m, "\n");

	SEQ_printf(m, " set_mode:       ");
	print_name_offset(m, dev->set_mode);
	SEQ_printf(m, "\n");

	SEQ_printf(m, " event_handler:  ");
	print_name_offset(m, dev->event_handler);
	SEQ_printf(m, "\n");
	SEQ_printf(m, " retries:        %lu\n", dev->retries);
	SEQ_printf(m, "\n");
}

static void timer_list_show_tickdevices_header(struct seq_file *m)
{
#ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST
	print_tickdevice(m, tick_get_broadcast_device(), -1);
	SEQ_printf(m, "tick_broadcast_mask: %08lx\n",
		   cpumask_bits(tick_get_broadcast_mask())[0]);
#ifdef CONFIG_TICK_ONESHOT
	SEQ_printf(m, "tick_broadcast_oneshot_mask: %08lx\n",
		   cpumask_bits(tick_get_broadcast_oneshot_mask())[0]);
#endif
	SEQ_printf(m, "\n");
#endif
}
#endif

static inline void timer_list_header(struct seq_file *m, u64 now)
{
	SEQ_printf(m, "Timer List Version: v0.7\n");
	SEQ_printf(m, "HRTIMER_MAX_CLOCK_BASES: %d\n", HRTIMER_MAX_CLOCK_BASES);
	SEQ_printf(m, "now at %Ld nsecs\n", (unsigned long long)now);
	SEQ_printf(m, "\n");
}

static int timer_list_show(struct seq_file *m, void *v)
{
	struct timer_list_iter *iter = v;

	if (iter->cpu == -1 && !iter->second_pass)
		timer_list_header(m, iter->now);
	else if (!iter->second_pass)
		print_cpu(m, iter->cpu, iter->now);
#ifdef CONFIG_GENERIC_CLOCKEVENTS
	else if (iter->cpu == -1 && iter->second_pass)
		timer_list_show_tickdevices_header(m);
	else
		print_tickdevice(m, tick_get_device(iter->cpu), iter->cpu);
#endif
	return 0;
}

void sysrq_timer_list_show(void)
{
	u64 now = ktime_to_ns(ktime_get());
	int cpu;

	timer_list_header(NULL, now);

	for_each_online_cpu(cpu)
		print_cpu(NULL, cpu, now);

#ifdef CONFIG_GENERIC_CLOCKEVENTS
	timer_list_show_tickdevices_header(NULL);
	for_each_online_cpu(cpu)
		print_tickdevice(NULL, tick_get_device(cpu), cpu);
#endif
	return;
}

static void *move_iter(struct timer_list_iter *iter, loff_t offset)
{
	for (; offset; offset--) {
		iter->cpu = cpumask_next(iter->cpu, cpu_online_mask);
		if (iter->cpu >= nr_cpu_ids) {
#ifdef CONFIG_GENERIC_CLOCKEVENTS
			if (!iter->second_pass) {
				iter->cpu = -1;
				iter->second_pass = true;
			} else
				return NULL;
#else
			return NULL;
#endif
		}
	}
	return iter;
}

static void *timer_list_start(struct seq_file *file, loff_t *offset)
{
	struct timer_list_iter *iter = file->private;

	if (!*offset)
		iter->now = ktime_to_ns(ktime_get());
	iter->cpu = -1;
	iter->second_pass = false;
	return move_iter(iter, *offset);
}

static void *timer_list_next(struct seq_file *file, void *v, loff_t *offset)
{
	struct timer_list_iter *iter = file->private;
	++*offset;
	return move_iter(iter, 1);
}

static void timer_list_stop(struct seq_file *seq, void *v)
{
}

static const struct seq_operations timer_list_sops = {
	.start = timer_list_start,
	.next = timer_list_next,
	.stop = timer_list_stop,
	.show = timer_list_show,
};

static int timer_list_open(struct inode *inode, struct file *filp)
{
	return seq_open_private(filp, &timer_list_sops,
			sizeof(struct timer_list_iter));
}

static const struct file_operations timer_list_fops = {
	.open		= timer_list_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= seq_release_private,
};

static int __init init_timer_list_procfs(void)
{
	struct proc_dir_entry *pe;

	pe = proc_create("timer_list", 0444, NULL, &timer_list_fops);
	if (!pe)
		return -ENOMEM;
	return 0;
}
__initcall(init_timer_list_procfs);
Commit	Line	Data
289f480a IM	1	/*
	2	* kernel/time/timer_list.c
	3	*
	4	* List pending timers
	5	*
	6	* Copyright(C) 2006, Red Hat, Inc., Ingo Molnar
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License version 2 as
	10	* published by the Free Software Foundation.
	11	*/
	12
	13	#include <linux/proc_fs.h>
	14	#include <linux/module.h>
	15	#include <linux/spinlock.h>
	16	#include <linux/sched.h>
	17	#include <linux/seq_file.h>
	18	#include <linux/kallsyms.h>
	19	#include <linux/tick.h>
	20
	21	#include <asm/uaccess.h>
	22
b3956a89 NZ	23
	24	struct timer_list_iter {
	25	int cpu;
	26	bool second_pass;
	27	u64 now;
	28	};
	29
289f480a IM	30	typedef void (print_fn_t)(struct seq_file m, unsigned int *classes);
	31
	32	DECLARE_PER_CPU(struct hrtimer_cpu_base, hrtimer_bases);
	33
	34	/*
	35	* This allows printing both to /proc/timer_list and
	36	* to the console (on SysRq-Q):
	37	*/
	38	#define SEQ_printf(m, x...) \
	39	do { \
	40	if (m) \
	41	seq_printf(m, x); \
	42	else \
	43	printk(x); \
	44	} while (0)
	45
	46	static void print_name_offset(struct seq_file m, void sym)
	47	{
9281acea	48	char symname[KSYM_NAME_LEN];
289f480a	49
9d65cb4a	50	if (lookup_symbol_name((unsigned long)sym, symname) < 0)
f5903085	51	SEQ_printf(m, "<%pK>", sym);
9d65cb4a AD	52	else
9d65cb4a AD	53	SEQ_printf(m, "%s", symname);
289f480a IM	54	}
	55
	56	static void
e67ef25a TG	57	print_timer(struct seq_file m, struct hrtimer taddr, struct hrtimer *timer,
e67ef25a TG	58	int idx, u64 now)
289f480a IM	59	{
	60	#ifdef CONFIG_TIMER_STATS
	61	char tmp[TASK_COMM_LEN + 1];
	62	#endif
	63	SEQ_printf(m, " #%d: ", idx);
e67ef25a	64	print_name_offset(m, taddr);
289f480a IM	65	SEQ_printf(m, ", ");
	66	print_name_offset(m, timer->function);
	67	SEQ_printf(m, ", S:%02lx", timer->state);
	68	#ifdef CONFIG_TIMER_STATS
	69	SEQ_printf(m, ", ");
	70	print_name_offset(m, timer->start_site);
	71	memcpy(tmp, timer->start_comm, TASK_COMM_LEN);
	72	tmp[TASK_COMM_LEN] = 0;
	73	SEQ_printf(m, ", %s/%d", tmp, timer->start_pid);
	74	#endif
	75	SEQ_printf(m, "\n");
704af52b AV	76	SEQ_printf(m, " # expires at %Lu-%Lu nsecs [in %Ld to %Ld nsecs]\n",
704af52b AV	77	(unsigned long long)ktime_to_ns(hrtimer_get_softexpires(timer)),
cc584b21	78	(unsigned long long)ktime_to_ns(hrtimer_get_expires(timer)),
704af52b	79	(long long)(ktime_to_ns(hrtimer_get_softexpires(timer)) - now),
cc584b21	80	(long long)(ktime_to_ns(hrtimer_get_expires(timer)) - now));
289f480a IM	81	}
	82
	83	static void
	84	print_active_timers(struct seq_file m, struct hrtimer_clock_base base,
	85	u64 now)
	86	{
	87	struct hrtimer *timer, tmp;
	88	unsigned long next = 0, i;
998adc3d	89	struct timerqueue_node *curr;
289f480a IM	90	unsigned long flags;
	91
	92	next_one:
	93	i = 0;
ecb49d1a	94	raw_spin_lock_irqsave(&base->cpu_base->lock, flags);
289f480a	95
998adc3d	96	curr = timerqueue_getnext(&base->active);
289f480a IM	97	/*
	98	* Crude but we have to do this O(N*N) thing, because
	99	* we have to unlock the base when printing:
	100	*/
	101	while (curr && i < next) {
998adc3d	102	curr = timerqueue_iterate_next(curr);
289f480a IM	103	i++;
	104	}
	105
	106	if (curr) {
	107
998adc3d	108	timer = container_of(curr, struct hrtimer, node);
289f480a	109	tmp = *timer;
ecb49d1a	110	raw_spin_unlock_irqrestore(&base->cpu_base->lock, flags);
289f480a	111
e67ef25a	112	print_timer(m, timer, &tmp, i, now);
289f480a IM	113	next++;
	114	goto next_one;
	115	}
ecb49d1a	116	raw_spin_unlock_irqrestore(&base->cpu_base->lock, flags);
289f480a IM	117	}
	118
	119	static void
	120	print_base(struct seq_file m, struct hrtimer_clock_base base, u64 now)
	121	{
f5903085	122	SEQ_printf(m, " .base: %pK\n", base);
289f480a IM	123	SEQ_printf(m, " .index: %d\n",
289f480a IM	124	base->index);
9b04bd27	125	SEQ_printf(m, " .resolution: %Lu nsecs\n",
289f480a IM	126	(unsigned long long)ktime_to_ns(base->resolution));
	127	SEQ_printf(m, " .get_time: ");
	128	print_name_offset(m, base->get_time);
	129	SEQ_printf(m, "\n");
	130	#ifdef CONFIG_HIGH_RES_TIMERS
9b04bd27 DM	131	SEQ_printf(m, " .offset: %Lu nsecs\n",
9b04bd27 DM	132	(unsigned long long) ktime_to_ns(base->offset));
289f480a IM	133	#endif
	134	SEQ_printf(m, "active timers:\n");
	135	print_active_timers(m, base, now);
	136	}
	137
	138	static void print_cpu(struct seq_file *m, int cpu, u64 now)
	139	{
	140	struct hrtimer_cpu_base *cpu_base = &per_cpu(hrtimer_bases, cpu);
	141	int i;
	142
129f1d2c	143	SEQ_printf(m, "cpu: %d\n", cpu);
289f480a IM	144	for (i = 0; i < HRTIMER_MAX_CLOCK_BASES; i++) {
	145	SEQ_printf(m, " clock %d:\n", i);
	146	print_base(m, cpu_base->clock_base + i, now);
	147	}
	148	#define P(x) \
9b04bd27 DM	149	SEQ_printf(m, " .%-15s: %Lu\n", #x, \
9b04bd27 DM	150	(unsigned long long)(cpu_base->x))
289f480a	151	#define P_ns(x) \
9b04bd27 DM	152	SEQ_printf(m, " .%-15s: %Lu nsecs\n", #x, \
9b04bd27 DM	153	(unsigned long long)(ktime_to_ns(cpu_base->x)))
289f480a IM	154
	155	#ifdef CONFIG_HIGH_RES_TIMERS
	156	P_ns(expires_next);
	157	P(hres_active);
	158	P(nr_events);
41d2e494 TG	159	P(nr_retries);
	160	P(nr_hangs);
	161	P_ns(max_hang_time);
289f480a IM	162	#endif
	163	#undef P
	164	#undef P_ns
	165
	166	#ifdef CONFIG_TICK_ONESHOT
	167	# define P(x) \
9b04bd27 DM	168	SEQ_printf(m, " .%-15s: %Lu\n", #x, \
9b04bd27 DM	169	(unsigned long long)(ts->x))
289f480a	170	# define P_ns(x) \
9b04bd27 DM	171	SEQ_printf(m, " .%-15s: %Lu nsecs\n", #x, \
9b04bd27 DM	172	(unsigned long long)(ktime_to_ns(ts->x)))
289f480a IM	173	{
	174	struct tick_sched *ts = tick_get_tick_sched(cpu);
	175	P(nohz_mode);
f5d411c9	176	P_ns(last_tick);
289f480a IM	177	P(tick_stopped);
	178	P(idle_jiffies);
	179	P(idle_calls);
	180	P(idle_sleeps);
	181	P_ns(idle_entrytime);
5df7fa1c TG	182	P_ns(idle_waketime);
5df7fa1c TG	183	P_ns(idle_exittime);
289f480a	184	P_ns(idle_sleeptime);
0224cf4c	185	P_ns(iowait_sleeptime);
289f480a IM	186	P(last_jiffies);
	187	P(next_jiffies);
	188	P_ns(idle_expires);
9b04bd27 DM	189	SEQ_printf(m, "jiffies: %Lu\n",
9b04bd27 DM	190	(unsigned long long)jiffies);
289f480a IM	191	}
	192	#endif
	193
	194	#undef P
	195	#undef P_ns
60cf7ea8	196	SEQ_printf(m, "\n");
289f480a IM	197	}
	198
	199	#ifdef CONFIG_GENERIC_CLOCKEVENTS
	200	static void
c5b77a3d	201	print_tickdevice(struct seq_file m, struct tick_device td, int cpu)
289f480a IM	202	{
	203	struct clock_event_device *dev = td->evtdev;
	204
129f1d2c	205	SEQ_printf(m, "Tick Device: mode: %d\n", td->mode);
c5b77a3d TG	206	if (cpu < 0)
	207	SEQ_printf(m, "Broadcast device\n");
	208	else
	209	SEQ_printf(m, "Per CPU device: %d\n", cpu);
289f480a IM	210
	211	SEQ_printf(m, "Clock Event Device: ");
	212	if (!dev) {
	213	SEQ_printf(m, "<NULL>\n");
	214	return;
	215	}
	216	SEQ_printf(m, "%s\n", dev->name);
97813f2f JH	217	SEQ_printf(m, " max_delta_ns: %llu\n",
	218	(unsigned long long) dev->max_delta_ns);
	219	SEQ_printf(m, " min_delta_ns: %llu\n",
	220	(unsigned long long) dev->min_delta_ns);
23af368e TG	221	SEQ_printf(m, " mult: %u\n", dev->mult);
23af368e TG	222	SEQ_printf(m, " shift: %u\n", dev->shift);
289f480a IM	223	SEQ_printf(m, " mode: %d\n", dev->mode);
	224	SEQ_printf(m, " next_event: %Ld nsecs\n",
	225	(unsigned long long) ktime_to_ns(dev->next_event));
	226
	227	SEQ_printf(m, " set_next_event: ");
	228	print_name_offset(m, dev->set_next_event);
	229	SEQ_printf(m, "\n");
	230
	231	SEQ_printf(m, " set_mode: ");
	232	print_name_offset(m, dev->set_mode);
	233	SEQ_printf(m, "\n");
	234
	235	SEQ_printf(m, " event_handler: ");
	236	print_name_offset(m, dev->event_handler);
	237	SEQ_printf(m, "\n");
80a05b9f	238	SEQ_printf(m, " retries: %lu\n", dev->retries);
60cf7ea8	239	SEQ_printf(m, "\n");
289f480a IM	240	}
289f480a IM	241
60cf7ea8	242	static void timer_list_show_tickdevices_header(struct seq_file *m)
289f480a	243	{
289f480a	244	#ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST
c5b77a3d	245	print_tickdevice(m, tick_get_broadcast_device(), -1);
289f480a	246	SEQ_printf(m, "tick_broadcast_mask: %08lx\n",
62ac1279	247	cpumask_bits(tick_get_broadcast_mask())[0]);
289f480a IM	248	#ifdef CONFIG_TICK_ONESHOT
289f480a IM	249	SEQ_printf(m, "tick_broadcast_oneshot_mask: %08lx\n",
62ac1279	250	cpumask_bits(tick_get_broadcast_oneshot_mask())[0]);
289f480a IM	251	#endif
	252	SEQ_printf(m, "\n");
	253	#endif
289f480a	254	}
289f480a IM	255	#endif
289f480a IM	256
b3956a89	257	static inline void timer_list_header(struct seq_file *m, u64 now)
289f480a	258	{
f5d411c9	259	SEQ_printf(m, "Timer List Version: v0.7\n");
289f480a IM	260	SEQ_printf(m, "HRTIMER_MAX_CLOCK_BASES: %d\n", HRTIMER_MAX_CLOCK_BASES);
289f480a IM	261	SEQ_printf(m, "now at %Ld nsecs\n", (unsigned long long)now);
60cf7ea8	262	SEQ_printf(m, "\n");
b3956a89 NZ	263	}
	264
	265	static int timer_list_show(struct seq_file m, void v)
	266	{
	267	struct timer_list_iter *iter = v;
b3956a89 NZ	268
b3956a89 NZ	269	if (iter->cpu == -1 && !iter->second_pass)
84a78a65	270	timer_list_header(m, iter->now);
b3956a89 NZ	271	else if (!iter->second_pass)
	272	print_cpu(m, iter->cpu, iter->now);
	273	#ifdef CONFIG_GENERIC_CLOCKEVENTS
	274	else if (iter->cpu == -1 && iter->second_pass)
	275	timer_list_show_tickdevices_header(m);
	276	else
	277	print_tickdevice(m, tick_get_device(iter->cpu), iter->cpu);
	278	#endif
	279	return 0;
	280	}
	281
	282	void sysrq_timer_list_show(void)
	283	{
	284	u64 now = ktime_to_ns(ktime_get());
	285	int cpu;
	286
	287	timer_list_header(NULL, now);
289f480a IM	288
289f480a IM	289	for_each_online_cpu(cpu)
b3956a89	290	print_cpu(NULL, cpu, now);
289f480a	291
60cf7ea8	292	#ifdef CONFIG_GENERIC_CLOCKEVENTS
b3956a89	293	timer_list_show_tickdevices_header(NULL);
60cf7ea8	294	for_each_online_cpu(cpu)
b3956a89	295	print_tickdevice(NULL, tick_get_device(cpu), cpu);
60cf7ea8	296	#endif
b3956a89 NZ	297	return;
b3956a89 NZ	298	}
289f480a	299
84a78a65	300	static void move_iter(struct timer_list_iter iter, loff_t offset)
b3956a89	301	{
84a78a65 NZ	302	for (; offset; offset--) {
	303	iter->cpu = cpumask_next(iter->cpu, cpu_online_mask);
	304	if (iter->cpu >= nr_cpu_ids) {
b3956a89	305	#ifdef CONFIG_GENERIC_CLOCKEVENTS
84a78a65 NZ	306	if (!iter->second_pass) {
	307	iter->cpu = -1;
	308	iter->second_pass = true;
	309	} else
	310	return NULL;
b3956a89	311	#else
84a78a65	312	return NULL;
b3956a89	313	#endif
84a78a65	314	}
b3956a89 NZ	315	}
b3956a89 NZ	316	return iter;
289f480a IM	317	}
289f480a IM	318
84a78a65 NZ	319	static void timer_list_start(struct seq_file file, loff_t *offset)
	320	{
	321	struct timer_list_iter *iter = file->private;
	322
	323	if (!*offset)
	324	iter->now = ktime_to_ns(ktime_get());
	325	iter->cpu = -1;
	326	iter->second_pass = false;
	327	return move_iter(iter, *offset);
	328	}
	329
b3956a89	330	static void timer_list_next(struct seq_file file, void v, loff_t offset)
289f480a	331	{
b3956a89	332	struct timer_list_iter *iter = file->private;
b3956a89	333	++*offset;
84a78a65	334	return move_iter(iter, 1);
289f480a IM	335	}
289f480a IM	336
b3956a89 NZ	337	static void timer_list_stop(struct seq_file seq, void v)
	338	{
	339	}
	340
	341	static const struct seq_operations timer_list_sops = {
	342	.start = timer_list_start,
	343	.next = timer_list_next,
	344	.stop = timer_list_stop,
	345	.show = timer_list_show,
	346	};
	347
289f480a IM	348	static int timer_list_open(struct inode inode, struct file filp)
289f480a IM	349	{
b3956a89 NZ	350	return seq_open_private(filp, &timer_list_sops,
b3956a89 NZ	351	sizeof(struct timer_list_iter));
289f480a IM	352	}
289f480a IM	353
828c0950	354	static const struct file_operations timer_list_fops = {
289f480a IM	355	.open = timer_list_open,
	356	.read = seq_read,
	357	.llseek = seq_lseek,
b3956a89	358	.release = seq_release_private,
289f480a IM	359	};
	360
	361	static int __init init_timer_list_procfs(void)
	362	{
	363	struct proc_dir_entry *pe;
	364
de809347	365	pe = proc_create("timer_list", 0444, NULL, &timer_list_fops);
289f480a IM	366	if (!pe)
289f480a IM	367	return -ENOMEM;
289f480a IM	368	return 0;
	369	}
	370	__initcall(init_timer_list_procfs);