[lttng-tools.git] / src / common / kernel-ctl / kernel-ctl.c

/*
 * Copyright (C) 2011 - Julien Desfossez <julien.desfossez@polymtl.ca>
 *                      Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
 *               2016 - Jérémie Galarneau <jeremie.galarneau@efficios.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License, version 2 only,
 * as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#define _LGPL_SOURCE
#define __USE_LINUX_IOCTL_DEFS
#include <sys/ioctl.h>
#include <string.h>
#include <common/align.h>
#include <common/macros.h>
#include <errno.h>
#include <stdarg.h>
#include <assert.h>

#include "kernel-ctl.h"
#include "kernel-ioctl.h"

#define LTTNG_IOCTL_CHECK(fildes, request, ...) ({	\
	int ret = ioctl(fildes, request, ##__VA_ARGS__);\
	assert(ret <= 0);				\
	!ret ? 0 : -errno;				\
})

#define LTTNG_IOCTL_NO_CHECK(fildes, request, ...) ({	\
	int ret = ioctl(fildes, request, ##__VA_ARGS__);\
	ret >= 0 ? ret : -errno;			\
})

/*
 * This flag indicates which version of the kernel ABI to use. The old
 * ABI (namespace _old) does not support a 32-bit user-space when the
 * kernel is 64-bit. The old ABI is kept here for compatibility but is
 * deprecated and will be removed eventually.
 */
static int lttng_kernel_use_old_abi = -1;

/*
 * Execute the new or old ioctl depending on the ABI version.
 * If the ABI version is not determined yet (lttng_kernel_use_old_abi = -1),
 * this function tests if the new ABI is available and otherwise fallbacks
 * on the old one.
 * This function takes the fd on which the ioctl must be executed and the old
 * and new request codes.
 * It returns the return value of the ioctl executed.
 */
static inline int compat_ioctl_no_arg(int fd, unsigned long oldname,
		unsigned long newname)
{
	int ret;

	if (lttng_kernel_use_old_abi == -1) {
		ret = LTTNG_IOCTL_NO_CHECK(fd, newname);
		if (!ret) {
			lttng_kernel_use_old_abi = 0;
			goto end;
		}
		lttng_kernel_use_old_abi = 1;
	}
	if (lttng_kernel_use_old_abi) {
		ret = LTTNG_IOCTL_NO_CHECK(fd, oldname);
	} else {
		ret = LTTNG_IOCTL_NO_CHECK(fd, newname);
	}

end:
	return ret;
}

int kernctl_create_session(int fd)
{
	return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_SESSION,
			LTTNG_KERNEL_SESSION);
}

/* open the metadata global channel */
int kernctl_open_metadata(int fd, struct lttng_channel_attr *chops)
{
	struct lttng_kernel_channel channel;

	if (lttng_kernel_use_old_abi) {
		struct lttng_kernel_old_channel old_channel;

		memset(&old_channel, 0, sizeof(old_channel));
		old_channel.overwrite = chops->overwrite;
		old_channel.subbuf_size = chops->subbuf_size;
		old_channel.num_subbuf = chops->num_subbuf;
		old_channel.switch_timer_interval = chops->switch_timer_interval;
		old_channel.read_timer_interval = chops->read_timer_interval;
		old_channel.output = chops->output;

		memset(old_channel.padding, 0, sizeof(old_channel.padding));
		/*
		 * The new channel padding is smaller than the old ABI so we use the
		 * new ABI padding size for the memcpy.
		 */
		memcpy(old_channel.padding, chops->padding, sizeof(chops->padding));

		return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_OLD_METADATA,
			        &old_channel);
	}

	memset(&channel, 0, sizeof(channel));
	channel.overwrite = chops->overwrite;
	channel.subbuf_size = chops->subbuf_size;
	channel.num_subbuf = chops->num_subbuf;
	channel.switch_timer_interval = chops->switch_timer_interval;
	channel.read_timer_interval = chops->read_timer_interval;
	channel.output = chops->output;
	memcpy(channel.padding, chops->padding, sizeof(chops->padding));

	return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_METADATA, &channel);
}

int kernctl_create_channel(int fd, struct lttng_channel_attr *chops)
{
	struct lttng_kernel_channel channel;

	memset(&channel, 0, sizeof(channel));
	if (lttng_kernel_use_old_abi) {
		struct lttng_kernel_old_channel old_channel;

		old_channel.overwrite = chops->overwrite;
		old_channel.subbuf_size = chops->subbuf_size;
		old_channel.num_subbuf = chops->num_subbuf;
		old_channel.switch_timer_interval = chops->switch_timer_interval;
		old_channel.read_timer_interval = chops->read_timer_interval;
		old_channel.output = chops->output;

		memset(old_channel.padding, 0, sizeof(old_channel.padding));
		/*
		 * The new channel padding is smaller than the old ABI so we use the
		 * new ABI padding size for the memcpy.
		 */
		memcpy(old_channel.padding, chops->padding, sizeof(chops->padding));

		return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_OLD_CHANNEL,
			        &old_channel);
	}

	channel.overwrite = chops->overwrite;
	channel.subbuf_size = chops->subbuf_size;
	channel.num_subbuf = chops->num_subbuf;
	channel.switch_timer_interval = chops->switch_timer_interval;
	channel.read_timer_interval = chops->read_timer_interval;
	channel.output = chops->output;
	memcpy(channel.padding, chops->padding, sizeof(chops->padding));

	return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_CHANNEL, &channel);
}

int kernctl_syscall_mask(int fd, char **syscall_mask, uint32_t *nr_bits)
{
	struct lttng_kernel_syscall_mask kmask_len, *kmask = NULL;
	size_t array_alloc_len;
	char *new_mask;
	int ret = 0;

	if (!syscall_mask) {
		ret = -1;
		goto end;
	}

	if (!nr_bits) {
		ret = -1;
		goto end;
	}

	kmask_len.len = 0;
	ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_SYSCALL_MASK, &kmask_len);
	if (ret) {
		goto end;
	}

	array_alloc_len = ALIGN(kmask_len.len, 8) >> 3;

	kmask = zmalloc(sizeof(*kmask) + array_alloc_len);
	if (!kmask) {
		ret = -1;
		goto end;
	}

	kmask->len = kmask_len.len;
	ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_SYSCALL_MASK, kmask);
	if (ret) {
		goto end;
	}

	new_mask = realloc(*syscall_mask, array_alloc_len);
	if (!new_mask) {
		ret = -1;
		goto end;
	}
	memcpy(new_mask, kmask->mask, array_alloc_len);
	*syscall_mask = new_mask;
	*nr_bits = kmask->len;

end:
	free(kmask);
	return ret;
}

int kernctl_track_pid(int fd, int pid)
{
	return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_SESSION_TRACK_PID, pid);
}

int kernctl_untrack_pid(int fd, int pid)
{
	return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_SESSION_UNTRACK_PID, pid);
}

int kernctl_list_tracker_pids(int fd)
{
	return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_SESSION_LIST_TRACKER_PIDS);
}

int kernctl_session_regenerate_metadata(int fd)
{
	return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_SESSION_METADATA_REGEN);
}

int kernctl_session_regenerate_statedump(int fd)
{
	return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_SESSION_STATEDUMP);
}

int kernctl_session_set_name(int fd, const char *name)
{
	int ret;
	struct lttng_kernel_session_name session_name;

	ret = lttng_strncpy(session_name.name, name, sizeof(session_name.name));
	if (ret) {
		goto end;
	}

	ret = LTTNG_IOCTL_CHECK(
			fd, LTTNG_KERNEL_SESSION_SET_NAME, &session_name);
end:
	return ret;
}

int kernctl_create_stream(int fd)
{
	return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_STREAM,
			LTTNG_KERNEL_STREAM);
}

int kernctl_create_event(int fd, struct lttng_kernel_event *ev)
{
	if (lttng_kernel_use_old_abi) {
		struct lttng_kernel_old_event old_event;

		memset(&old_event, 0, sizeof(old_event));
		memcpy(old_event.name, ev->name, sizeof(old_event.name));
		old_event.instrumentation = ev->instrumentation;
		switch (ev->instrumentation) {
		case LTTNG_KERNEL_KPROBE:
			old_event.u.kprobe.addr = ev->u.kprobe.addr;
			old_event.u.kprobe.offset = ev->u.kprobe.offset;
			memcpy(old_event.u.kprobe.symbol_name,
				ev->u.kprobe.symbol_name,
				sizeof(old_event.u.kprobe.symbol_name));
			break;
		case LTTNG_KERNEL_KRETPROBE:
			old_event.u.kretprobe.addr = ev->u.kretprobe.addr;
			old_event.u.kretprobe.offset = ev->u.kretprobe.offset;
			memcpy(old_event.u.kretprobe.symbol_name,
				ev->u.kretprobe.symbol_name,
				sizeof(old_event.u.kretprobe.symbol_name));
			break;
		case LTTNG_KERNEL_FUNCTION:
			memcpy(old_event.u.ftrace.symbol_name,
					ev->u.ftrace.symbol_name,
					sizeof(old_event.u.ftrace.symbol_name));
			break;
		default:
			break;
		}

		return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_OLD_EVENT,
			        &old_event);
	}
	return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_EVENT, ev);
}

int kernctl_add_context(int fd, struct lttng_kernel_context *ctx)
{
	if (lttng_kernel_use_old_abi) {
		struct lttng_kernel_old_context old_ctx;

		memset(&old_ctx, 0, sizeof(old_ctx));
		old_ctx.ctx = ctx->ctx;
		/* only type that uses the union */
		if (ctx->ctx == LTTNG_KERNEL_CONTEXT_PERF_CPU_COUNTER) {
			old_ctx.u.perf_counter.type =
				ctx->u.perf_counter.type;
			old_ctx.u.perf_counter.config =
				ctx->u.perf_counter.config;
			memcpy(old_ctx.u.perf_counter.name,
				ctx->u.perf_counter.name,
				sizeof(old_ctx.u.perf_counter.name));
		}
		return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_OLD_CONTEXT, &old_ctx);
	}
	return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_CONTEXT, ctx);
}


/* Enable event, channel and session LTTNG_IOCTL_CHECK */
int kernctl_enable(int fd)
{
	return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_ENABLE,
			LTTNG_KERNEL_ENABLE);
}

/* Disable event, channel and session LTTNG_IOCTL_CHECK */
int kernctl_disable(int fd)
{
	return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_DISABLE,
			LTTNG_KERNEL_DISABLE);
}

int kernctl_start_session(int fd)
{
	return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_SESSION_START,
			LTTNG_KERNEL_SESSION_START);
}

int kernctl_stop_session(int fd)
{
	return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_SESSION_STOP,
			LTTNG_KERNEL_SESSION_STOP);
}

int kernctl_filter(int fd, struct lttng_filter_bytecode *filter)
{
	struct lttng_kernel_filter_bytecode *kb;
	uint32_t len;
	int ret;

	/* Translate bytecode to kernel bytecode */
	kb = zmalloc(sizeof(*kb) + filter->len);
	if (!kb)
		return -ENOMEM;
	kb->len = len = filter->len;
	kb->reloc_offset = filter->reloc_table_offset;
	kb->seqnum = filter->seqnum;
	memcpy(kb->data, filter->data, len);
	ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_FILTER, kb);
	free(kb);
	return ret;
}

int kernctl_add_callsite(int fd, struct lttng_kernel_event_callsite *callsite)
{
	return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ADD_CALLSITE, callsite);
}

int kernctl_tracepoint_list(int fd)
{
	return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_TRACEPOINT_LIST,
			LTTNG_KERNEL_TRACEPOINT_LIST);
}

int kernctl_syscall_list(int fd)
{
	return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_SYSCALL_LIST);
}

int kernctl_tracer_version(int fd, struct lttng_kernel_tracer_version *v)
{
	int ret;

	if (lttng_kernel_use_old_abi == -1) {
		ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_TRACER_VERSION, v);
		if (!ret) {
			lttng_kernel_use_old_abi = 0;
			goto end;
		}
		lttng_kernel_use_old_abi = 1;
	}
	if (lttng_kernel_use_old_abi) {
		struct lttng_kernel_old_tracer_version old_v;

		ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_OLD_TRACER_VERSION, &old_v);
		if (ret) {
			goto end;
		}
		v->major = old_v.major;
		v->minor = old_v.minor;
		v->patchlevel = old_v.patchlevel;
	} else {
		ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_TRACER_VERSION, v);
	}

end:
	return ret;
}

int kernctl_tracer_abi_version(int fd,
		struct lttng_kernel_tracer_abi_version *v)
{
	return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_TRACER_ABI_VERSION, v);
}

int kernctl_wait_quiescent(int fd)
{
	return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_WAIT_QUIESCENT,
			LTTNG_KERNEL_WAIT_QUIESCENT);
}

int kernctl_buffer_flush(int fd)
{
	return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_FLUSH);
}

int kernctl_buffer_flush_empty(int fd)
{
	return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_FLUSH_EMPTY);
}

/* returns the version of the metadata. */
int kernctl_get_metadata_version(int fd, uint64_t *version)
{
	return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_GET_METADATA_VERSION, version);
}

int kernctl_metadata_cache_dump(int fd)
{
	return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_METADATA_CACHE_DUMP);
}

/* Buffer operations */

/* For mmap mode, readable without "get" operation */

/* returns the length to mmap. */
int kernctl_get_mmap_len(int fd, unsigned long *len)
{
	return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_GET_MMAP_LEN, len);
}

/* returns the maximum size for sub-buffers. */
int kernctl_get_max_subbuf_size(int fd, unsigned long *len)
{
	return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_GET_MAX_SUBBUF_SIZE, len);
}

/*
 * For mmap mode, operate on the current packet (between get/put or
 * get_next/put_next).
 */

/* returns the offset of the subbuffer belonging to the mmap reader. */
int kernctl_get_mmap_read_offset(int fd, unsigned long *off)
{
	return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_GET_MMAP_READ_OFFSET, off);
}

/* returns the size of the current sub-buffer, without padding (for mmap). */
int kernctl_get_subbuf_size(int fd, unsigned long *len)
{
	return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_GET_SUBBUF_SIZE, len);
}

/* returns the size of the current sub-buffer, without padding (for mmap). */
int kernctl_get_padded_subbuf_size(int fd, unsigned long *len)
{
	return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_GET_PADDED_SUBBUF_SIZE, len);
}

/* Get exclusive read access to the next sub-buffer that can be read. */
int kernctl_get_next_subbuf(int fd)
{
	return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_GET_NEXT_SUBBUF);
}


/* Release exclusive sub-buffer access, move consumer forward. */
int kernctl_put_next_subbuf(int fd)
{
	return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_PUT_NEXT_SUBBUF);
}

/* snapshot */

/* Get a snapshot of the current ring buffer producer and consumer positions */
int kernctl_snapshot(int fd)
{
	return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_SNAPSHOT);
}

/*
 * Get a snapshot of the current ring buffer producer and consumer positions,
 * regardless of whether or not the two positions are contained within the
 * same sub-buffer.
 */
int kernctl_snapshot_sample_positions(int fd)
{
	return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_SNAPSHOT_SAMPLE_POSITIONS);
}

/* Get the consumer position (iteration start) */
int kernctl_snapshot_get_consumed(int fd, unsigned long *pos)
{
	return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_SNAPSHOT_GET_CONSUMED, pos);
}

/* Get the producer position (iteration end) */
int kernctl_snapshot_get_produced(int fd, unsigned long *pos)
{
	return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_SNAPSHOT_GET_PRODUCED, pos);
}

/* Get exclusive read access to the specified sub-buffer position */
int kernctl_get_subbuf(int fd, unsigned long *len)
{
	return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_GET_SUBBUF, len);
}

/* Release exclusive sub-buffer access */
int kernctl_put_subbuf(int fd)
{
	return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_PUT_SUBBUF);
}

/* Returns the timestamp begin of the current sub-buffer. */
int kernctl_get_timestamp_begin(int fd, uint64_t *timestamp_begin)
{
	return LTTNG_IOCTL_CHECK(fd, LTTNG_RING_BUFFER_GET_TIMESTAMP_BEGIN,
			timestamp_begin);
}

/* Returns the timestamp end of the current sub-buffer. */
int kernctl_get_timestamp_end(int fd, uint64_t *timestamp_end)
{
	return LTTNG_IOCTL_CHECK(fd, LTTNG_RING_BUFFER_GET_TIMESTAMP_END,
			timestamp_end);
}

/* Returns the number of discarded events in the current sub-buffer. */
int kernctl_get_events_discarded(int fd, uint64_t *events_discarded)
{
	return LTTNG_IOCTL_CHECK(fd, LTTNG_RING_BUFFER_GET_EVENTS_DISCARDED,
			events_discarded);
}

/* Returns the content size in the current sub-buffer. */
int kernctl_get_content_size(int fd, uint64_t *content_size)
{
	return LTTNG_IOCTL_CHECK(fd, LTTNG_RING_BUFFER_GET_CONTENT_SIZE,
			content_size);
}

/* Returns the packet size in the current sub-buffer. */
int kernctl_get_packet_size(int fd, uint64_t *packet_size)
{
	return LTTNG_IOCTL_CHECK(fd, LTTNG_RING_BUFFER_GET_PACKET_SIZE,
		        packet_size);
}

/* Returns the stream id of the current sub-buffer. */
int kernctl_get_stream_id(int fd, uint64_t *stream_id)
{
	return LTTNG_IOCTL_CHECK(fd, LTTNG_RING_BUFFER_GET_STREAM_ID,
		        stream_id);
}

/* Returns the current timestamp. */
int kernctl_get_current_timestamp(int fd, uint64_t *ts)
{
	return LTTNG_IOCTL_CHECK(fd, LTTNG_RING_BUFFER_GET_CURRENT_TIMESTAMP,
			ts);
}

/* Returns the packet sequence number of the current sub-buffer. */
int kernctl_get_sequence_number(int fd, uint64_t *seq)
{
	return LTTNG_IOCTL_CHECK(fd, LTTNG_RING_BUFFER_GET_SEQ_NUM, seq);
}

/* Returns the stream instance id. */
int kernctl_get_instance_id(int fd, uint64_t *id)
{
	return LTTNG_IOCTL_CHECK(fd, LTTNG_RING_BUFFER_INSTANCE_ID, id);
}
Commit	Line	Data
ee0326c0	1	/*
16421f6e DG	2	* Copyright (C) 2011 - Julien Desfossez <julien.desfossez@polymtl.ca>
16421f6e DG	3	* Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
a6bd6d9b	4	* 2016 - Jérémie Galarneau <jeremie.galarneau@efficios.com>
ee0326c0	5	*
d14d33bf AM	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License, version 2 only,
	8	* as published by the Free Software Foundation.
ee0326c0 DG	9	*
	10	* This program is distributed in the hope that it will be useful,
	11	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	13	* GNU General Public License for more details.
	14	*
d14d33bf AM	15	* You should have received a copy of the GNU General Public License along
	16	* with this program; if not, write to the Free Software Foundation, Inc.,
	17	* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
ee0326c0	18	*/
16421f6e	19
6c1c0768	20	#define _LGPL_SOURCE
95ba0f2f	21	#define __USE_LINUX_IOCTL_DEFS
16421f6e	22	#include <sys/ioctl.h>
4dbc372b	23	#include <string.h>
46820c8b	24	#include <common/align.h>
8ff4109e	25	#include <common/macros.h>
00a62084	26	#include <errno.h>
a6bd6d9b JG	27	#include <stdarg.h>
a6bd6d9b JG	28	#include <assert.h>
16421f6e	29
10a8a223	30	#include "kernel-ctl.h"
16421f6e	31	#include "kernel-ioctl.h"
16421f6e	32
5226f1bc	33	#define LTTNG_IOCTL_CHECK(fildes, request, ...) ({ \
a6bd6d9b JG	34	int ret = ioctl(fildes, request, ##__VA_ARGS__);\
a6bd6d9b JG	35	assert(ret <= 0); \
5226f1bc JG	36	!ret ? 0 : -errno; \
	37	})
	38
	39	#define LTTNG_IOCTL_NO_CHECK(fildes, request, ...) ({ \
	40	int ret = ioctl(fildes, request, ##__VA_ARGS__);\
	41	ret >= 0 ? ret : -errno; \
a6bd6d9b JG	42	})
a6bd6d9b JG	43
4dbc372b JD	44	/*
	45	* This flag indicates which version of the kernel ABI to use. The old
	46	* ABI (namespace _old) does not support a 32-bit user-space when the
	47	* kernel is 64-bit. The old ABI is kept here for compatibility but is
	48	* deprecated and will be removed eventually.
	49	*/
	50	static int lttng_kernel_use_old_abi = -1;
	51
	52	/*
	53	* Execute the new or old ioctl depending on the ABI version.
	54	* If the ABI version is not determined yet (lttng_kernel_use_old_abi = -1),
	55	* this function tests if the new ABI is available and otherwise fallbacks
	56	* on the old one.
	57	* This function takes the fd on which the ioctl must be executed and the old
	58	* and new request codes.
	59	* It returns the return value of the ioctl executed.
	60	*/
	61	static inline int compat_ioctl_no_arg(int fd, unsigned long oldname,
	62	unsigned long newname)
	63	{
	64	int ret;
	65
	66	if (lttng_kernel_use_old_abi == -1) {
5226f1bc	67	ret = LTTNG_IOCTL_NO_CHECK(fd, newname);
4dbc372b JD	68	if (!ret) {
	69	lttng_kernel_use_old_abi = 0;
	70	goto end;
	71	}
	72	lttng_kernel_use_old_abi = 1;
	73	}
	74	if (lttng_kernel_use_old_abi) {
5226f1bc	75	ret = LTTNG_IOCTL_NO_CHECK(fd, oldname);
4dbc372b	76	} else {
5226f1bc	77	ret = LTTNG_IOCTL_NO_CHECK(fd, newname);
4dbc372b JD	78	}
	79
	80	end:
	81	return ret;
	82	}
	83
964ccb60	84	int kernctl_create_session(int fd)
d65106b1	85	{
4dbc372b JD	86	return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_SESSION,
4dbc372b JD	87	LTTNG_KERNEL_SESSION);
d65106b1 DG	88	}
d65106b1 DG	89
964ccb60 MD	90	/* open the metadata global channel */
964ccb60 MD	91	int kernctl_open_metadata(int fd, struct lttng_channel_attr *chops)
f3ed775e	92	{
4dbc372b JD	93	struct lttng_kernel_channel channel;
	94
	95	if (lttng_kernel_use_old_abi) {
10600be0 MD	96	struct lttng_kernel_old_channel old_channel;
	97
	98	memset(&old_channel, 0, sizeof(old_channel));
4dbc372b JD	99	old_channel.overwrite = chops->overwrite;
	100	old_channel.subbuf_size = chops->subbuf_size;
	101	old_channel.num_subbuf = chops->num_subbuf;
	102	old_channel.switch_timer_interval = chops->switch_timer_interval;
	103	old_channel.read_timer_interval = chops->read_timer_interval;
	104	old_channel.output = chops->output;
f853c53a DG	105
	106	memset(old_channel.padding, 0, sizeof(old_channel.padding));
	107	/*
	108	* The new channel padding is smaller than the old ABI so we use the
	109	* new ABI padding size for the memcpy.
	110	*/
	111	memcpy(old_channel.padding, chops->padding, sizeof(chops->padding));
4dbc372b	112
5226f1bc JG	113	return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_OLD_METADATA,
5226f1bc JG	114	&old_channel);
4dbc372b JD	115	}
4dbc372b JD	116
10600be0	117	memset(&channel, 0, sizeof(channel));
4dbc372b JD	118	channel.overwrite = chops->overwrite;
	119	channel.subbuf_size = chops->subbuf_size;
	120	channel.num_subbuf = chops->num_subbuf;
	121	channel.switch_timer_interval = chops->switch_timer_interval;
	122	channel.read_timer_interval = chops->read_timer_interval;
	123	channel.output = chops->output;
ea207e3b	124	memcpy(channel.padding, chops->padding, sizeof(chops->padding));
4dbc372b	125
5226f1bc	126	return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_METADATA, &channel);
f3ed775e DG	127	}
	128
	129	int kernctl_create_channel(int fd, struct lttng_channel_attr *chops)
16421f6e	130	{
4dbc372b JD	131	struct lttng_kernel_channel channel;
4dbc372b JD	132
c74101ef	133	memset(&channel, 0, sizeof(channel));
4dbc372b JD	134	if (lttng_kernel_use_old_abi) {
	135	struct lttng_kernel_old_channel old_channel;
	136
	137	old_channel.overwrite = chops->overwrite;
	138	old_channel.subbuf_size = chops->subbuf_size;
	139	old_channel.num_subbuf = chops->num_subbuf;
	140	old_channel.switch_timer_interval = chops->switch_timer_interval;
	141	old_channel.read_timer_interval = chops->read_timer_interval;
	142	old_channel.output = chops->output;
f853c53a DG	143
	144	memset(old_channel.padding, 0, sizeof(old_channel.padding));
	145	/*
	146	* The new channel padding is smaller than the old ABI so we use the
	147	* new ABI padding size for the memcpy.
	148	*/
	149	memcpy(old_channel.padding, chops->padding, sizeof(chops->padding));
4dbc372b	150
5226f1bc JG	151	return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_OLD_CHANNEL,
5226f1bc JG	152	&old_channel);
4dbc372b JD	153	}
	154
	155	channel.overwrite = chops->overwrite;
	156	channel.subbuf_size = chops->subbuf_size;
	157	channel.num_subbuf = chops->num_subbuf;
	158	channel.switch_timer_interval = chops->switch_timer_interval;
	159	channel.read_timer_interval = chops->read_timer_interval;
	160	channel.output = chops->output;
ea207e3b	161	memcpy(channel.padding, chops->padding, sizeof(chops->padding));
4dbc372b	162
5226f1bc	163	return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_CHANNEL, &channel);
16421f6e DG	164	}
16421f6e DG	165
46820c8b MD	166	int kernctl_syscall_mask(int fd, char *syscall_mask, uint32_t nr_bits)
	167	{
	168	struct lttng_kernel_syscall_mask kmask_len, *kmask = NULL;
	169	size_t array_alloc_len;
	170	char *new_mask;
	171	int ret = 0;
	172
	173	if (!syscall_mask) {
	174	ret = -1;
	175	goto end;
	176	}
	177
	178	if (!nr_bits) {
	179	ret = -1;
	180	goto end;
	181	}
	182
	183	kmask_len.len = 0;
5226f1bc	184	ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_SYSCALL_MASK, &kmask_len);
46820c8b MD	185	if (ret) {
	186	goto end;
	187	}
	188
	189	array_alloc_len = ALIGN(kmask_len.len, 8) >> 3;
834978fd	190
46820c8b MD	191	kmask = zmalloc(sizeof(*kmask) + array_alloc_len);
	192	if (!kmask) {
	193	ret = -1;
	194	goto end;
	195	}
	196
	197	kmask->len = kmask_len.len;
5226f1bc	198	ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_SYSCALL_MASK, kmask);
46820c8b MD	199	if (ret) {
	200	goto end;
	201	}
	202
834978fd	203	new_mask = realloc(*syscall_mask, array_alloc_len);
46820c8b MD	204	if (!new_mask) {
	205	ret = -1;
	206	goto end;
	207	}
	208	memcpy(new_mask, kmask->mask, array_alloc_len);
	209	*syscall_mask = new_mask;
	210	*nr_bits = kmask->len;
	211
	212	end:
	213	free(kmask);
	214	return ret;
	215	}
	216
ccf10263 MD	217	int kernctl_track_pid(int fd, int pid)
ccf10263 MD	218	{
5226f1bc	219	return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_SESSION_TRACK_PID, pid);
ccf10263 MD	220	}
	221
	222	int kernctl_untrack_pid(int fd, int pid)
	223	{
5226f1bc	224	return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_SESSION_UNTRACK_PID, pid);
ccf10263 MD	225	}
ccf10263 MD	226
a5dfbb9d MD	227	int kernctl_list_tracker_pids(int fd)
a5dfbb9d MD	228	{
5226f1bc	229	return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_SESSION_LIST_TRACKER_PIDS);
a5dfbb9d MD	230	}
a5dfbb9d MD	231
eded6438	232	int kernctl_session_regenerate_metadata(int fd)
93ec662e	233	{
5226f1bc	234	return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_SESSION_METADATA_REGEN);
93ec662e JD	235	}
93ec662e JD	236
c2561365 JD	237	int kernctl_session_regenerate_statedump(int fd)
	238	{
	239	return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_SESSION_STATEDUMP);
	240	}
	241
8ff4109e JR	242	int kernctl_session_set_name(int fd, const char *name)
	243	{
	244	int ret;
	245	struct lttng_kernel_session_name session_name;
	246
	247	ret = lttng_strncpy(session_name.name, name, sizeof(session_name.name));
	248	if (ret) {
	249	goto end;
	250	}
	251
	252	ret = LTTNG_IOCTL_CHECK(
	253	fd, LTTNG_KERNEL_SESSION_SET_NAME, &session_name);
	254	end:
	255	return ret;
	256	}
	257
964ccb60	258	int kernctl_create_stream(int fd)
16421f6e	259	{
4dbc372b JD	260	return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_STREAM,
4dbc372b JD	261	LTTNG_KERNEL_STREAM);
16421f6e DG	262	}
16421f6e DG	263
964ccb60	264	int kernctl_create_event(int fd, struct lttng_kernel_event *ev)
16421f6e	265	{
4dbc372b JD	266	if (lttng_kernel_use_old_abi) {
	267	struct lttng_kernel_old_event old_event;
	268
10600be0	269	memset(&old_event, 0, sizeof(old_event));
4dbc372b JD	270	memcpy(old_event.name, ev->name, sizeof(old_event.name));
	271	old_event.instrumentation = ev->instrumentation;
	272	switch (ev->instrumentation) {
	273	case LTTNG_KERNEL_KPROBE:
	274	old_event.u.kprobe.addr = ev->u.kprobe.addr;
	275	old_event.u.kprobe.offset = ev->u.kprobe.offset;
	276	memcpy(old_event.u.kprobe.symbol_name,
	277	ev->u.kprobe.symbol_name,
	278	sizeof(old_event.u.kprobe.symbol_name));
	279	break;
	280	case LTTNG_KERNEL_KRETPROBE:
	281	old_event.u.kretprobe.addr = ev->u.kretprobe.addr;
	282	old_event.u.kretprobe.offset = ev->u.kretprobe.offset;
	283	memcpy(old_event.u.kretprobe.symbol_name,
	284	ev->u.kretprobe.symbol_name,
	285	sizeof(old_event.u.kretprobe.symbol_name));
	286	break;
	287	case LTTNG_KERNEL_FUNCTION:
	288	memcpy(old_event.u.ftrace.symbol_name,
	289	ev->u.ftrace.symbol_name,
	290	sizeof(old_event.u.ftrace.symbol_name));
	291	break;
	292	default:
	293	break;
	294	}
	295
5226f1bc JG	296	return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_OLD_EVENT,
5226f1bc JG	297	&old_event);
4dbc372b	298	}
5226f1bc	299	return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_EVENT, ev);
16421f6e DG	300	}
16421f6e DG	301
964ccb60	302	int kernctl_add_context(int fd, struct lttng_kernel_context *ctx)
16421f6e	303	{
4dbc372b JD	304	if (lttng_kernel_use_old_abi) {
	305	struct lttng_kernel_old_context old_ctx;
	306
10600be0	307	memset(&old_ctx, 0, sizeof(old_ctx));
4dbc372b JD	308	old_ctx.ctx = ctx->ctx;
4dbc372b JD	309	/* only type that uses the union */
aa3514e9	310	if (ctx->ctx == LTTNG_KERNEL_CONTEXT_PERF_CPU_COUNTER) {
4dbc372b JD	311	old_ctx.u.perf_counter.type =
	312	ctx->u.perf_counter.type;
	313	old_ctx.u.perf_counter.config =
	314	ctx->u.perf_counter.config;
	315	memcpy(old_ctx.u.perf_counter.name,
	316	ctx->u.perf_counter.name,
	317	sizeof(old_ctx.u.perf_counter.name));
	318	}
5226f1bc	319	return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_OLD_CONTEXT, &old_ctx);
4dbc372b	320	}
5226f1bc	321	return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_CONTEXT, ctx);
16421f6e DG	322	}
16421f6e DG	323
964ccb60	324
5226f1bc	325	/* Enable event, channel and session LTTNG_IOCTL_CHECK */
f3ed775e DG	326	int kernctl_enable(int fd)
f3ed775e DG	327	{
4dbc372b JD	328	return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_ENABLE,
4dbc372b JD	329	LTTNG_KERNEL_ENABLE);
f3ed775e DG	330	}
f3ed775e DG	331
5226f1bc	332	/* Disable event, channel and session LTTNG_IOCTL_CHECK */
f3ed775e DG	333	int kernctl_disable(int fd)
f3ed775e DG	334	{
4dbc372b JD	335	return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_DISABLE,
4dbc372b JD	336	LTTNG_KERNEL_DISABLE);
f3ed775e DG	337	}
f3ed775e DG	338
964ccb60	339	int kernctl_start_session(int fd)
16421f6e	340	{
4dbc372b JD	341	return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_SESSION_START,
4dbc372b JD	342	LTTNG_KERNEL_SESSION_START);
964ccb60 MD	343	}
	344
	345	int kernctl_stop_session(int fd)
	346	{
4dbc372b JD	347	return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_SESSION_STOP,
4dbc372b JD	348	LTTNG_KERNEL_SESSION_STOP);
16421f6e DG	349	}
16421f6e DG	350
00a62084 MD	351	int kernctl_filter(int fd, struct lttng_filter_bytecode *filter)
	352	{
	353	struct lttng_kernel_filter_bytecode *kb;
	354	uint32_t len;
	355	int ret;
	356
	357	/* Translate bytecode to kernel bytecode */
	358	kb = zmalloc(sizeof(*kb) + filter->len);
	359	if (!kb)
	360	return -ENOMEM;
	361	kb->len = len = filter->len;
	362	kb->reloc_offset = filter->reloc_table_offset;
	363	kb->seqnum = filter->seqnum;
	364	memcpy(kb->data, filter->data, len);
5226f1bc	365	ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_FILTER, kb);
00a62084 MD	366	free(kb);
	367	return ret;
	368	}
	369
1ab8c2ad FD	370	int kernctl_add_callsite(int fd, struct lttng_kernel_event_callsite *callsite)
	371	{
	372	return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ADD_CALLSITE, callsite);
	373	}
	374
964ccb60 MD	375	int kernctl_tracepoint_list(int fd)
964ccb60 MD	376	{
4dbc372b JD	377	return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_TRACEPOINT_LIST,
4dbc372b JD	378	LTTNG_KERNEL_TRACEPOINT_LIST);
964ccb60 MD	379	}
964ccb60 MD	380
d02666a9 MD	381	int kernctl_syscall_list(int fd)
d02666a9 MD	382	{
5226f1bc	383	return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_SYSCALL_LIST);
d02666a9 MD	384	}
d02666a9 MD	385
964ccb60 MD	386	int kernctl_tracer_version(int fd, struct lttng_kernel_tracer_version *v)
964ccb60 MD	387	{
4dbc372b JD	388	int ret;
	389
	390	if (lttng_kernel_use_old_abi == -1) {
5226f1bc	391	ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_TRACER_VERSION, v);
4dbc372b JD	392	if (!ret) {
	393	lttng_kernel_use_old_abi = 0;
	394	goto end;
	395	}
	396	lttng_kernel_use_old_abi = 1;
	397	}
	398	if (lttng_kernel_use_old_abi) {
	399	struct lttng_kernel_old_tracer_version old_v;
	400
5226f1bc	401	ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_OLD_TRACER_VERSION, &old_v);
4dbc372b JD	402	if (ret) {
	403	goto end;
	404	}
	405	v->major = old_v.major;
	406	v->minor = old_v.minor;
	407	v->patchlevel = old_v.patchlevel;
	408	} else {
5226f1bc	409	ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_TRACER_VERSION, v);
4dbc372b JD	410	}
	411
	412	end:
	413	return ret;
964ccb60 MD	414	}
964ccb60 MD	415
c052142c MD	416	int kernctl_tracer_abi_version(int fd,
	417	struct lttng_kernel_tracer_abi_version *v)
	418	{
5226f1bc	419	return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_TRACER_ABI_VERSION, v);
c052142c MD	420	}
c052142c MD	421
964ccb60 MD	422	int kernctl_wait_quiescent(int fd)
964ccb60 MD	423	{
4dbc372b JD	424	return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_WAIT_QUIESCENT,
4dbc372b JD	425	LTTNG_KERNEL_WAIT_QUIESCENT);
964ccb60 MD	426	}
964ccb60 MD	427
964ccb60 MD	428	int kernctl_buffer_flush(int fd)
964ccb60 MD	429	{
5226f1bc	430	return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_FLUSH);
964ccb60 MD	431	}
964ccb60 MD	432
f22dd891 MD	433	int kernctl_buffer_flush_empty(int fd)
	434	{
	435	return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_FLUSH_EMPTY);
	436	}
	437
93ec662e JD	438	/* returns the version of the metadata. */
	439	int kernctl_get_metadata_version(int fd, uint64_t *version)
	440	{
5226f1bc	441	return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_GET_METADATA_VERSION, version);
93ec662e JD	442	}
93ec662e JD	443
8024cc8c JD	444	int kernctl_metadata_cache_dump(int fd)
	445	{
	446	return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_METADATA_CACHE_DUMP);
	447	}
964ccb60 MD	448
	449	/* Buffer operations */
	450
	451	/* For mmap mode, readable without "get" operation */
	452
16421f6e DG	453	/* returns the length to mmap. */
	454	int kernctl_get_mmap_len(int fd, unsigned long *len)
	455	{
5226f1bc	456	return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_GET_MMAP_LEN, len);
16421f6e DG	457	}
16421f6e DG	458
964ccb60 MD	459	/* returns the maximum size for sub-buffers. */
	460	int kernctl_get_max_subbuf_size(int fd, unsigned long *len)
	461	{
5226f1bc	462	return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_GET_MAX_SUBBUF_SIZE, len);
964ccb60 MD	463	}
	464
	465	/*
	466	* For mmap mode, operate on the current packet (between get/put or
	467	* get_next/put_next).
	468	*/
	469
16421f6e DG	470	/* returns the offset of the subbuffer belonging to the mmap reader. */
	471	int kernctl_get_mmap_read_offset(int fd, unsigned long *off)
	472	{
5226f1bc	473	return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_GET_MMAP_READ_OFFSET, off);
16421f6e DG	474	}
16421f6e DG	475
964ccb60 MD	476	/* returns the size of the current sub-buffer, without padding (for mmap). */
964ccb60 MD	477	int kernctl_get_subbuf_size(int fd, unsigned long *len)
16421f6e	478	{
5226f1bc	479	return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_GET_SUBBUF_SIZE, len);
16421f6e DG	480	}
	481
	482	/* returns the size of the current sub-buffer, without padding (for mmap). */
	483	int kernctl_get_padded_subbuf_size(int fd, unsigned long *len)
	484	{
5226f1bc	485	return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_GET_PADDED_SUBBUF_SIZE, len);
16421f6e DG	486	}
16421f6e DG	487
964ccb60 MD	488	/* Get exclusive read access to the next sub-buffer that can be read. */
964ccb60 MD	489	int kernctl_get_next_subbuf(int fd)
16421f6e	490	{
5226f1bc	491	return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_GET_NEXT_SUBBUF);
16421f6e DG	492	}
16421f6e DG	493
d4a1283e	494
16421f6e DG	495	/* Release exclusive sub-buffer access, move consumer forward. */
	496	int kernctl_put_next_subbuf(int fd)
	497	{
5226f1bc	498	return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_PUT_NEXT_SUBBUF);
16421f6e DG	499	}
16421f6e DG	500
964ccb60	501	/* snapshot */
16421f6e DG	502
	503	/* Get a snapshot of the current ring buffer producer and consumer positions */
	504	int kernctl_snapshot(int fd)
	505	{
5226f1bc	506	return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_SNAPSHOT);
16421f6e DG	507	}
16421f6e DG	508
b007ec59 JG	509	/*
	510	* Get a snapshot of the current ring buffer producer and consumer positions,
	511	* regardless of whether or not the two positions are contained within the
	512	* same sub-buffer.
	513	*/
	514	int kernctl_snapshot_sample_positions(int fd)
	515	{
	516	return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_SNAPSHOT_SAMPLE_POSITIONS);
	517	}
	518
16421f6e DG	519	/* Get the consumer position (iteration start) */
	520	int kernctl_snapshot_get_consumed(int fd, unsigned long *pos)
	521	{
5226f1bc	522	return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_SNAPSHOT_GET_CONSUMED, pos);
16421f6e DG	523	}
	524
	525	/* Get the producer position (iteration end) */
	526	int kernctl_snapshot_get_produced(int fd, unsigned long *pos)
	527	{
5226f1bc	528	return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_SNAPSHOT_GET_PRODUCED, pos);
16421f6e DG	529	}
16421f6e DG	530
964ccb60 MD	531	/* Get exclusive read access to the specified sub-buffer position */
964ccb60 MD	532	int kernctl_get_subbuf(int fd, unsigned long *len)
f3ed775e	533	{
5226f1bc	534	return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_GET_SUBBUF, len);
f3ed775e	535	}
d0254c7c	536
964ccb60 MD	537	/* Release exclusive sub-buffer access */
964ccb60 MD	538	int kernctl_put_subbuf(int fd)
d0254c7c	539	{
5226f1bc	540	return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_PUT_SUBBUF);
d0254c7c	541	}
309167d2 JD	542
	543	/* Returns the timestamp begin of the current sub-buffer. */
	544	int kernctl_get_timestamp_begin(int fd, uint64_t *timestamp_begin)
	545	{
5226f1bc	546	return LTTNG_IOCTL_CHECK(fd, LTTNG_RING_BUFFER_GET_TIMESTAMP_BEGIN,
a6bd6d9b	547	timestamp_begin);
309167d2 JD	548	}
	549
	550	/* Returns the timestamp end of the current sub-buffer. */
	551	int kernctl_get_timestamp_end(int fd, uint64_t *timestamp_end)
	552	{
5226f1bc	553	return LTTNG_IOCTL_CHECK(fd, LTTNG_RING_BUFFER_GET_TIMESTAMP_END,
a6bd6d9b	554	timestamp_end);
309167d2 JD	555	}
	556
	557	/* Returns the number of discarded events in the current sub-buffer. */
	558	int kernctl_get_events_discarded(int fd, uint64_t *events_discarded)
	559	{
5226f1bc	560	return LTTNG_IOCTL_CHECK(fd, LTTNG_RING_BUFFER_GET_EVENTS_DISCARDED,
a6bd6d9b	561	events_discarded);
309167d2 JD	562	}
	563
	564	/* Returns the content size in the current sub-buffer. */
	565	int kernctl_get_content_size(int fd, uint64_t *content_size)
	566	{
5226f1bc	567	return LTTNG_IOCTL_CHECK(fd, LTTNG_RING_BUFFER_GET_CONTENT_SIZE,
a6bd6d9b	568	content_size);
309167d2 JD	569	}
	570
	571	/* Returns the packet size in the current sub-buffer. */
	572	int kernctl_get_packet_size(int fd, uint64_t *packet_size)
	573	{
5226f1bc JG	574	return LTTNG_IOCTL_CHECK(fd, LTTNG_RING_BUFFER_GET_PACKET_SIZE,
5226f1bc JG	575	packet_size);
309167d2 JD	576	}
	577
	578	/* Returns the stream id of the current sub-buffer. */
	579	int kernctl_get_stream_id(int fd, uint64_t *stream_id)
	580	{
5226f1bc JG	581	return LTTNG_IOCTL_CHECK(fd, LTTNG_RING_BUFFER_GET_STREAM_ID,
5226f1bc JG	582	stream_id);
309167d2	583	}
d3e2ba59 JD	584
	585	/* Returns the current timestamp. */
	586	int kernctl_get_current_timestamp(int fd, uint64_t *ts)
	587	{
5226f1bc JG	588	return LTTNG_IOCTL_CHECK(fd, LTTNG_RING_BUFFER_GET_CURRENT_TIMESTAMP,
5226f1bc JG	589	ts);
d3e2ba59	590	}
fb83fe64 JD	591
	592	/* Returns the packet sequence number of the current sub-buffer. */
	593	int kernctl_get_sequence_number(int fd, uint64_t *seq)
	594	{
5226f1bc	595	return LTTNG_IOCTL_CHECK(fd, LTTNG_RING_BUFFER_GET_SEQ_NUM, seq);
fb83fe64	596	}
000fa86f JD	597
	598	/* Returns the stream instance id. */
	599	int kernctl_get_instance_id(int fd, uint64_t *id)
	600	{
5226f1bc	601	return LTTNG_IOCTL_CHECK(fd, LTTNG_RING_BUFFER_INSTANCE_ID, id);
000fa86f	602	}