[linux-2.6-block.git] / kernel / time / timer_list.c

// SPDX-License-Identifier: GPL-2.0
/*
 * List pending timers
 *
 * Copyright(C) 2006, Red Hat, Inc., Ingo Molnar
 */

#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/nmi.h>

#include <linux/uaccess.h>

#include "tick-internal.h"

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

/*
 * This allows printing both to /proc/timer_list and
 * to the console (on SysRq-Q):
 */
__printf(2, 3)
static void SEQ_printf(struct seq_file *m, const char *fmt, ...)
{
	va_list args;

	va_start(args, fmt);

	if (m)
		seq_vprintf(m, fmt, args);
	else
		vprintk(fmt, args);

	va_end(args);
}

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)
{
	SEQ_printf(m, " #%d: ", idx);
	print_name_offset(m, taddr);
	SEQ_printf(m, ", ");
	print_name_offset(m, timer->function);
	SEQ_printf(m, ", S:%02x", timer->state);
	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;

	touch_nmi_watchdog();

	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: %u nsecs\n", hrtimer_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 + ktime_to_ns(base->offset));
}

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(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_timer);
		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;

	touch_nmi_watchdog();

	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", clockevent_get_state(dev));
	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");

	if (dev->set_state_shutdown) {
		SEQ_printf(m, " shutdown: ");
		print_name_offset(m, dev->set_state_shutdown);
		SEQ_printf(m, "\n");
	}

	if (dev->set_state_periodic) {
		SEQ_printf(m, " periodic: ");
		print_name_offset(m, dev->set_state_periodic);
		SEQ_printf(m, "\n");
	}

	if (dev->set_state_oneshot) {
		SEQ_printf(m, " oneshot:  ");
		print_name_offset(m, dev->set_state_oneshot);
		SEQ_printf(m, "\n");
	}

	if (dev->set_state_oneshot_stopped) {
		SEQ_printf(m, " oneshot stopped: ");
		print_name_offset(m, dev->set_state_oneshot_stopped);
		SEQ_printf(m, "\n");
	}

	if (dev->tick_resume) {
		SEQ_printf(m, " resume:   ");
		print_name_offset(m, dev->tick_resume);
		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: %*pb\n",
		   cpumask_pr_args(tick_get_broadcast_mask()));
#ifdef CONFIG_TICK_ONESHOT
	SEQ_printf(m, "tick_broadcast_oneshot_mask: %*pb\n",
		   cpumask_pr_args(tick_get_broadcast_oneshot_mask()));
#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: v0.8\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 __init init_timer_list_procfs(void)
{
	struct proc_dir_entry *pe;

	pe = proc_create_seq_private("timer_list", 0400, NULL, &timer_list_sops,
			sizeof(struct timer_list_iter), NULL);
	if (!pe)
		return -ENOMEM;
	return 0;
}
__initcall(init_timer_list_procfs);
Commit	Line	Data
35728b82	1	// SPDX-License-Identifier: GPL-2.0
289f480a	2	/*
289f480a IM	3	* List pending timers
	4	*
	5	* Copyright(C) 2006, Red Hat, Inc., Ingo Molnar
289f480a IM	6	*/
	7
	8	#include <linux/proc_fs.h>
	9	#include <linux/module.h>
	10	#include <linux/spinlock.h>
	11	#include <linux/sched.h>
	12	#include <linux/seq_file.h>
	13	#include <linux/kallsyms.h>
01070427	14	#include <linux/nmi.h>
289f480a	15
7c0f6ba6	16	#include <linux/uaccess.h>
289f480a	17
c1797baf	18	#include "tick-internal.h"
b3956a89 NZ	19
	20	struct timer_list_iter {
	21	int cpu;
	22	bool second_pass;
	23	u64 now;
	24	};
	25
289f480a IM	26	/*
	27	* This allows printing both to /proc/timer_list and
	28	* to the console (on SysRq-Q):
	29	*/
7de4e744 JP	30	__printf(2, 3)
	31	static void SEQ_printf(struct seq_file m, const char fmt, ...)
	32	{
	33	va_list args;
	34
	35	va_start(args, fmt);
	36
	37	if (m)
	38	seq_vprintf(m, fmt, args);
	39	else
	40	vprintk(fmt, args);
	41
	42	va_end(args);
	43	}
289f480a IM	44
	45	static void print_name_offset(struct seq_file m, void sym)
	46	{
9281acea	47	char symname[KSYM_NAME_LEN];
289f480a	48
9d65cb4a	49	if (lookup_symbol_name((unsigned long)sym, symname) < 0)
f5903085	50	SEQ_printf(m, "<%pK>", sym);
9d65cb4a AD	51	else
9d65cb4a AD	52	SEQ_printf(m, "%s", symname);
289f480a IM	53	}
	54
	55	static void
e67ef25a TG	56	print_timer(struct seq_file m, struct hrtimer taddr, struct hrtimer *timer,
e67ef25a TG	57	int idx, u64 now)
289f480a	58	{
289f480a	59	SEQ_printf(m, " #%d: ", idx);
e67ef25a	60	print_name_offset(m, taddr);
289f480a IM	61	SEQ_printf(m, ", ");
289f480a IM	62	print_name_offset(m, timer->function);
203cbf77	63	SEQ_printf(m, ", S:%02x", timer->state);
289f480a	64	SEQ_printf(m, "\n");
704af52b AV	65	SEQ_printf(m, " # expires at %Lu-%Lu nsecs [in %Ld to %Ld nsecs]\n",
704af52b AV	66	(unsigned long long)ktime_to_ns(hrtimer_get_softexpires(timer)),
cc584b21	67	(unsigned long long)ktime_to_ns(hrtimer_get_expires(timer)),
704af52b	68	(long long)(ktime_to_ns(hrtimer_get_softexpires(timer)) - now),
cc584b21	69	(long long)(ktime_to_ns(hrtimer_get_expires(timer)) - now));
289f480a IM	70	}
	71
	72	static void
	73	print_active_timers(struct seq_file m, struct hrtimer_clock_base base,
	74	u64 now)
	75	{
	76	struct hrtimer *timer, tmp;
	77	unsigned long next = 0, i;
998adc3d	78	struct timerqueue_node *curr;
289f480a IM	79	unsigned long flags;
	80
	81	next_one:
	82	i = 0;
01070427 TH	83
	84	touch_nmi_watchdog();
	85
ecb49d1a	86	raw_spin_lock_irqsave(&base->cpu_base->lock, flags);
289f480a	87
998adc3d	88	curr = timerqueue_getnext(&base->active);
289f480a IM	89	/*
	90	* Crude but we have to do this O(N*N) thing, because
	91	* we have to unlock the base when printing:
	92	*/
	93	while (curr && i < next) {
998adc3d	94	curr = timerqueue_iterate_next(curr);
289f480a IM	95	i++;
	96	}
	97
	98	if (curr) {
	99
998adc3d	100	timer = container_of(curr, struct hrtimer, node);
289f480a	101	tmp = *timer;
ecb49d1a	102	raw_spin_unlock_irqrestore(&base->cpu_base->lock, flags);
289f480a	103
e67ef25a	104	print_timer(m, timer, &tmp, i, now);
289f480a IM	105	next++;
	106	goto next_one;
	107	}
ecb49d1a	108	raw_spin_unlock_irqrestore(&base->cpu_base->lock, flags);
289f480a IM	109	}
	110
	111	static void
	112	print_base(struct seq_file m, struct hrtimer_clock_base base, u64 now)
	113	{
f5903085	114	SEQ_printf(m, " .base: %pK\n", base);
398ca17f TG	115	SEQ_printf(m, " .index: %d\n", base->index);
398ca17f TG	116
7551b02b	117	SEQ_printf(m, " .resolution: %u nsecs\n", hrtimer_resolution);
398ca17f	118
289f480a IM	119	SEQ_printf(m, " .get_time: ");
	120	print_name_offset(m, base->get_time);
	121	SEQ_printf(m, "\n");
	122	#ifdef CONFIG_HIGH_RES_TIMERS
9b04bd27 DM	123	SEQ_printf(m, " .offset: %Lu nsecs\n",
9b04bd27 DM	124	(unsigned long long) ktime_to_ns(base->offset));
289f480a IM	125	#endif
289f480a IM	126	SEQ_printf(m, "active timers:\n");
38bf985b	127	print_active_timers(m, base, now + ktime_to_ns(base->offset));
289f480a IM	128	}
	129
	130	static void print_cpu(struct seq_file *m, int cpu, u64 now)
	131	{
	132	struct hrtimer_cpu_base *cpu_base = &per_cpu(hrtimer_bases, cpu);
	133	int i;
	134
129f1d2c	135	SEQ_printf(m, "cpu: %d\n", cpu);
289f480a IM	136	for (i = 0; i < HRTIMER_MAX_CLOCK_BASES; i++) {
	137	SEQ_printf(m, " clock %d:\n", i);
	138	print_base(m, cpu_base->clock_base + i, now);
	139	}
	140	#define P(x) \
9b04bd27 DM	141	SEQ_printf(m, " .%-15s: %Lu\n", #x, \
9b04bd27 DM	142	(unsigned long long)(cpu_base->x))
289f480a	143	#define P_ns(x) \
9b04bd27 DM	144	SEQ_printf(m, " .%-15s: %Lu nsecs\n", #x, \
9b04bd27 DM	145	(unsigned long long)(ktime_to_ns(cpu_base->x)))
289f480a IM	146
	147	#ifdef CONFIG_HIGH_RES_TIMERS
	148	P_ns(expires_next);
	149	P(hres_active);
	150	P(nr_events);
41d2e494 TG	151	P(nr_retries);
41d2e494 TG	152	P(nr_hangs);
a6ffebce	153	P(max_hang_time);
289f480a IM	154	#endif
	155	#undef P
	156	#undef P_ns
	157
	158	#ifdef CONFIG_TICK_ONESHOT
	159	# define P(x) \
9b04bd27 DM	160	SEQ_printf(m, " .%-15s: %Lu\n", #x, \
9b04bd27 DM	161	(unsigned long long)(ts->x))
289f480a	162	# define P_ns(x) \
9b04bd27 DM	163	SEQ_printf(m, " .%-15s: %Lu nsecs\n", #x, \
9b04bd27 DM	164	(unsigned long long)(ktime_to_ns(ts->x)))
289f480a IM	165	{
	166	struct tick_sched *ts = tick_get_tick_sched(cpu);
	167	P(nohz_mode);
f5d411c9	168	P_ns(last_tick);
289f480a IM	169	P(tick_stopped);
	170	P(idle_jiffies);
	171	P(idle_calls);
	172	P(idle_sleeps);
	173	P_ns(idle_entrytime);
5df7fa1c TG	174	P_ns(idle_waketime);
5df7fa1c TG	175	P_ns(idle_exittime);
289f480a	176	P_ns(idle_sleeptime);
0224cf4c	177	P_ns(iowait_sleeptime);
289f480a	178	P(last_jiffies);
c1ad348b	179	P(next_timer);
289f480a	180	P_ns(idle_expires);
9b04bd27 DM	181	SEQ_printf(m, "jiffies: %Lu\n",
9b04bd27 DM	182	(unsigned long long)jiffies);
289f480a IM	183	}
	184	#endif
	185
	186	#undef P
	187	#undef P_ns
60cf7ea8	188	SEQ_printf(m, "\n");
289f480a IM	189	}
	190
	191	#ifdef CONFIG_GENERIC_CLOCKEVENTS
	192	static void
c5b77a3d	193	print_tickdevice(struct seq_file m, struct tick_device td, int cpu)
289f480a IM	194	{
	195	struct clock_event_device *dev = td->evtdev;
	196
01070427 TH	197	touch_nmi_watchdog();
01070427 TH	198
129f1d2c	199	SEQ_printf(m, "Tick Device: mode: %d\n", td->mode);
c5b77a3d TG	200	if (cpu < 0)
	201	SEQ_printf(m, "Broadcast device\n");
	202	else
	203	SEQ_printf(m, "Per CPU device: %d\n", cpu);
289f480a IM	204
	205	SEQ_printf(m, "Clock Event Device: ");
	206	if (!dev) {
	207	SEQ_printf(m, "<NULL>\n");
	208	return;
	209	}
	210	SEQ_printf(m, "%s\n", dev->name);
97813f2f JH	211	SEQ_printf(m, " max_delta_ns: %llu\n",
	212	(unsigned long long) dev->max_delta_ns);
	213	SEQ_printf(m, " min_delta_ns: %llu\n",
	214	(unsigned long long) dev->min_delta_ns);
23af368e TG	215	SEQ_printf(m, " mult: %u\n", dev->mult);
23af368e TG	216	SEQ_printf(m, " shift: %u\n", dev->shift);
eef7635a	217	SEQ_printf(m, " mode: %d\n", clockevent_get_state(dev));
289f480a IM	218	SEQ_printf(m, " next_event: %Ld nsecs\n",
	219	(unsigned long long) ktime_to_ns(dev->next_event));
	220
	221	SEQ_printf(m, " set_next_event: ");
	222	print_name_offset(m, dev->set_next_event);
	223	SEQ_printf(m, "\n");
	224
eef7635a VK	225	if (dev->set_state_shutdown) {
	226	SEQ_printf(m, " shutdown: ");
	227	print_name_offset(m, dev->set_state_shutdown);
	228	SEQ_printf(m, "\n");
	229	}
	230
	231	if (dev->set_state_periodic) {
	232	SEQ_printf(m, " periodic: ");
	233	print_name_offset(m, dev->set_state_periodic);
	234	SEQ_printf(m, "\n");
	235	}
	236
	237	if (dev->set_state_oneshot) {
	238	SEQ_printf(m, " oneshot: ");
	239	print_name_offset(m, dev->set_state_oneshot);
	240	SEQ_printf(m, "\n");
	241	}
	242
	243	if (dev->set_state_oneshot_stopped) {
	244	SEQ_printf(m, " oneshot stopped: ");
	245	print_name_offset(m, dev->set_state_oneshot_stopped);
	246	SEQ_printf(m, "\n");
	247	}
	248
	249	if (dev->tick_resume) {
	250	SEQ_printf(m, " resume: ");
	251	print_name_offset(m, dev->tick_resume);
bd624d75	252	SEQ_printf(m, "\n");
bd624d75	253	}
289f480a IM	254
	255	SEQ_printf(m, " event_handler: ");
	256	print_name_offset(m, dev->event_handler);
	257	SEQ_printf(m, "\n");
80a05b9f	258	SEQ_printf(m, " retries: %lu\n", dev->retries);
60cf7ea8	259	SEQ_printf(m, "\n");
289f480a IM	260	}
289f480a IM	261
60cf7ea8	262	static void timer_list_show_tickdevices_header(struct seq_file *m)
289f480a	263	{
289f480a	264	#ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST
c5b77a3d	265	print_tickdevice(m, tick_get_broadcast_device(), -1);
1ef09cd7 PM	266	SEQ_printf(m, "tick_broadcast_mask: %*pb\n",
1ef09cd7 PM	267	cpumask_pr_args(tick_get_broadcast_mask()));
289f480a	268	#ifdef CONFIG_TICK_ONESHOT
1ef09cd7 PM	269	SEQ_printf(m, "tick_broadcast_oneshot_mask: %*pb\n",
1ef09cd7 PM	270	cpumask_pr_args(tick_get_broadcast_oneshot_mask()));
289f480a IM	271	#endif
	272	SEQ_printf(m, "\n");
	273	#endif
289f480a	274	}
289f480a IM	275	#endif
289f480a IM	276
b3956a89	277	static inline void timer_list_header(struct seq_file *m, u64 now)
289f480a	278	{
c1ad348b	279	SEQ_printf(m, "Timer List Version: v0.8\n");
289f480a IM	280	SEQ_printf(m, "HRTIMER_MAX_CLOCK_BASES: %d\n", HRTIMER_MAX_CLOCK_BASES);
289f480a IM	281	SEQ_printf(m, "now at %Ld nsecs\n", (unsigned long long)now);
60cf7ea8	282	SEQ_printf(m, "\n");
b3956a89 NZ	283	}
	284
	285	static int timer_list_show(struct seq_file m, void v)
	286	{
	287	struct timer_list_iter *iter = v;
b3956a89 NZ	288
b3956a89 NZ	289	if (iter->cpu == -1 && !iter->second_pass)
84a78a65	290	timer_list_header(m, iter->now);
b3956a89 NZ	291	else if (!iter->second_pass)
	292	print_cpu(m, iter->cpu, iter->now);
	293	#ifdef CONFIG_GENERIC_CLOCKEVENTS
	294	else if (iter->cpu == -1 && iter->second_pass)
	295	timer_list_show_tickdevices_header(m);
	296	else
	297	print_tickdevice(m, tick_get_device(iter->cpu), iter->cpu);
	298	#endif
	299	return 0;
	300	}
	301
	302	void sysrq_timer_list_show(void)
	303	{
	304	u64 now = ktime_to_ns(ktime_get());
	305	int cpu;
	306
	307	timer_list_header(NULL, now);
289f480a IM	308
289f480a IM	309	for_each_online_cpu(cpu)
b3956a89	310	print_cpu(NULL, cpu, now);
289f480a	311
60cf7ea8	312	#ifdef CONFIG_GENERIC_CLOCKEVENTS
b3956a89	313	timer_list_show_tickdevices_header(NULL);
60cf7ea8	314	for_each_online_cpu(cpu)
b3956a89	315	print_tickdevice(NULL, tick_get_device(cpu), cpu);
60cf7ea8	316	#endif
b3956a89 NZ	317	return;
b3956a89 NZ	318	}
289f480a	319
84a78a65	320	static void move_iter(struct timer_list_iter iter, loff_t offset)
b3956a89	321	{
84a78a65 NZ	322	for (; offset; offset--) {
	323	iter->cpu = cpumask_next(iter->cpu, cpu_online_mask);
	324	if (iter->cpu >= nr_cpu_ids) {
b3956a89	325	#ifdef CONFIG_GENERIC_CLOCKEVENTS
84a78a65 NZ	326	if (!iter->second_pass) {
	327	iter->cpu = -1;
	328	iter->second_pass = true;
	329	} else
	330	return NULL;
b3956a89	331	#else
84a78a65	332	return NULL;
b3956a89	333	#endif
84a78a65	334	}
b3956a89 NZ	335	}
b3956a89 NZ	336	return iter;
289f480a IM	337	}
289f480a IM	338
84a78a65 NZ	339	static void timer_list_start(struct seq_file file, loff_t *offset)
	340	{
	341	struct timer_list_iter *iter = file->private;
	342
	343	if (!*offset)
	344	iter->now = ktime_to_ns(ktime_get());
	345	iter->cpu = -1;
	346	iter->second_pass = false;
	347	return move_iter(iter, *offset);
	348	}
	349
b3956a89	350	static void timer_list_next(struct seq_file file, void v, loff_t offset)
289f480a	351	{
b3956a89	352	struct timer_list_iter *iter = file->private;
b3956a89	353	++*offset;
84a78a65	354	return move_iter(iter, 1);
289f480a IM	355	}
289f480a IM	356
b3956a89 NZ	357	static void timer_list_stop(struct seq_file seq, void v)
	358	{
	359	}
	360
	361	static const struct seq_operations timer_list_sops = {
	362	.start = timer_list_start,
	363	.next = timer_list_next,
	364	.stop = timer_list_stop,
	365	.show = timer_list_show,
	366	};
	367
289f480a IM	368	static int __init init_timer_list_procfs(void)
	369	{
	370	struct proc_dir_entry *pe;
	371
44414d82 CH	372	pe = proc_create_seq_private("timer_list", 0400, NULL, &timer_list_sops,
44414d82 CH	373	sizeof(struct timer_list_iter), NULL);
289f480a IM	374	if (!pe)
289f480a IM	375	return -ENOMEM;
289f480a IM	376	return 0;
	377	}
	378	__initcall(init_timer_list_procfs);