[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 <errno.h>
#include <stdarg.h>
#include <assert.h>

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

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

/*
 * 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 = ioctl(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 = ioctl(fd, oldname);
	} else {
		ret = ioctl(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 ioctl(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 ioctl(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 ioctl(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 ioctl(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(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(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(fd, LTTNG_KERNEL_SESSION_TRACK_PID, pid);
}

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

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

int kernctl_session_metadata_regenerate(int fd)
{
	return LTTNG_IOCTL(fd, LTTNG_KERNEL_SESSION_METADATA_REGEN);
}

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 ioctl(fd, LTTNG_KERNEL_OLD_EVENT, &old_event);
	}
	return ioctl(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(fd, LTTNG_KERNEL_OLD_CONTEXT, &old_ctx);
	}
	return LTTNG_IOCTL(fd, LTTNG_KERNEL_CONTEXT, ctx);
}


/* Enable event, channel and session LTTNG_IOCTL */
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 */
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(fd, LTTNG_KERNEL_FILTER, kb);
	free(kb);
	return ret;
}

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 ioctl(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(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(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(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(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_calibrate(int fd, struct lttng_kernel_calibrate *calibrate)
{
	int ret;

	if (lttng_kernel_use_old_abi == -1) {
		ret = LTTNG_IOCTL(fd, LTTNG_KERNEL_CALIBRATE, calibrate);
		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_calibrate old_calibrate;

		old_calibrate.type = calibrate->type;
		ret = LTTNG_IOCTL(fd, LTTNG_KERNEL_OLD_CALIBRATE,
				&old_calibrate);
		if (ret) {
			goto end;
		}
		calibrate->type = old_calibrate.type;
	} else {
		ret = LTTNG_IOCTL(fd, LTTNG_KERNEL_CALIBRATE, calibrate);
	}

end:
	return ret;
}


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

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


/* 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(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(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(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(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(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(fd, RING_BUFFER_GET_NEXT_SUBBUF);
}


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

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

/* Release exclusive sub-buffer access */
int kernctl_put_subbuf(int fd)
{
	return LTTNG_IOCTL(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(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(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(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(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(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(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(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(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(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>
9bb29afd	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>
00a62084	25	#include <errno.h>
9bb29afd JG	26	#include <stdarg.h>
9bb29afd JG	27	#include <assert.h>
16421f6e	28
10a8a223	29	#include "kernel-ctl.h"
16421f6e	30	#include "kernel-ioctl.h"
16421f6e	31
9bb29afd JG	32	#define LTTNG_IOCTL(fildes, request, ...) ({ \
	33	int ret = ioctl(fildes, request, ##__VA_ARGS__);\
	34	assert(ret <= 0); \
	35	ret ? -errno : 0; \
	36	})
	37
4dbc372b JD	38	/*
	39	* This flag indicates which version of the kernel ABI to use. The old
	40	* ABI (namespace _old) does not support a 32-bit user-space when the
	41	* kernel is 64-bit. The old ABI is kept here for compatibility but is
	42	* deprecated and will be removed eventually.
	43	*/
	44	static int lttng_kernel_use_old_abi = -1;
	45
	46	/*
	47	* Execute the new or old ioctl depending on the ABI version.
	48	* If the ABI version is not determined yet (lttng_kernel_use_old_abi = -1),
	49	* this function tests if the new ABI is available and otherwise fallbacks
	50	* on the old one.
	51	* This function takes the fd on which the ioctl must be executed and the old
	52	* and new request codes.
	53	* It returns the return value of the ioctl executed.
	54	*/
	55	static inline int compat_ioctl_no_arg(int fd, unsigned long oldname,
	56	unsigned long newname)
	57	{
	58	int ret;
	59
	60	if (lttng_kernel_use_old_abi == -1) {
	61	ret = ioctl(fd, newname);
	62	if (!ret) {
	63	lttng_kernel_use_old_abi = 0;
	64	goto end;
	65	}
	66	lttng_kernel_use_old_abi = 1;
	67	}
	68	if (lttng_kernel_use_old_abi) {
	69	ret = ioctl(fd, oldname);
	70	} else {
	71	ret = ioctl(fd, newname);
	72	}
	73
	74	end:
	75	return ret;
	76	}
	77
964ccb60	78	int kernctl_create_session(int fd)
d65106b1	79	{
4dbc372b JD	80	return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_SESSION,
4dbc372b JD	81	LTTNG_KERNEL_SESSION);
d65106b1 DG	82	}
d65106b1 DG	83
964ccb60 MD	84	/* open the metadata global channel */
964ccb60 MD	85	int kernctl_open_metadata(int fd, struct lttng_channel_attr *chops)
f3ed775e	86	{
4dbc372b JD	87	struct lttng_kernel_channel channel;
	88
	89	if (lttng_kernel_use_old_abi) {
a4999208 MD	90	struct lttng_kernel_old_channel old_channel;
	91
	92	memset(&old_channel, 0, sizeof(old_channel));
4dbc372b JD	93	old_channel.overwrite = chops->overwrite;
	94	old_channel.subbuf_size = chops->subbuf_size;
	95	old_channel.num_subbuf = chops->num_subbuf;
	96	old_channel.switch_timer_interval = chops->switch_timer_interval;
	97	old_channel.read_timer_interval = chops->read_timer_interval;
	98	old_channel.output = chops->output;
f853c53a DG	99
	100	memset(old_channel.padding, 0, sizeof(old_channel.padding));
	101	/*
	102	* The new channel padding is smaller than the old ABI so we use the
	103	* new ABI padding size for the memcpy.
	104	*/
	105	memcpy(old_channel.padding, chops->padding, sizeof(chops->padding));
4dbc372b JD	106
	107	return ioctl(fd, LTTNG_KERNEL_OLD_METADATA, &old_channel);
	108	}
	109
a4999208	110	memset(&channel, 0, sizeof(channel));
4dbc372b JD	111	channel.overwrite = chops->overwrite;
	112	channel.subbuf_size = chops->subbuf_size;
	113	channel.num_subbuf = chops->num_subbuf;
	114	channel.switch_timer_interval = chops->switch_timer_interval;
	115	channel.read_timer_interval = chops->read_timer_interval;
	116	channel.output = chops->output;
ea207e3b	117	memcpy(channel.padding, chops->padding, sizeof(chops->padding));
4dbc372b JD	118
4dbc372b JD	119	return ioctl(fd, LTTNG_KERNEL_METADATA, &channel);
f3ed775e DG	120	}
	121
	122	int kernctl_create_channel(int fd, struct lttng_channel_attr *chops)
16421f6e	123	{
4dbc372b JD	124	struct lttng_kernel_channel channel;
4dbc372b JD	125
c74101ef	126	memset(&channel, 0, sizeof(channel));
4dbc372b JD	127	if (lttng_kernel_use_old_abi) {
	128	struct lttng_kernel_old_channel old_channel;
	129
	130	old_channel.overwrite = chops->overwrite;
	131	old_channel.subbuf_size = chops->subbuf_size;
	132	old_channel.num_subbuf = chops->num_subbuf;
	133	old_channel.switch_timer_interval = chops->switch_timer_interval;
	134	old_channel.read_timer_interval = chops->read_timer_interval;
	135	old_channel.output = chops->output;
f853c53a DG	136
	137	memset(old_channel.padding, 0, sizeof(old_channel.padding));
	138	/*
	139	* The new channel padding is smaller than the old ABI so we use the
	140	* new ABI padding size for the memcpy.
	141	*/
	142	memcpy(old_channel.padding, chops->padding, sizeof(chops->padding));
4dbc372b JD	143
	144	return ioctl(fd, LTTNG_KERNEL_OLD_CHANNEL, &old_channel);
	145	}
	146
	147	channel.overwrite = chops->overwrite;
	148	channel.subbuf_size = chops->subbuf_size;
	149	channel.num_subbuf = chops->num_subbuf;
	150	channel.switch_timer_interval = chops->switch_timer_interval;
	151	channel.read_timer_interval = chops->read_timer_interval;
	152	channel.output = chops->output;
ea207e3b	153	memcpy(channel.padding, chops->padding, sizeof(chops->padding));
4dbc372b JD	154
4dbc372b JD	155	return ioctl(fd, LTTNG_KERNEL_CHANNEL, &channel);
16421f6e DG	156	}
16421f6e DG	157
46820c8b MD	158	int kernctl_syscall_mask(int fd, char *syscall_mask, uint32_t nr_bits)
	159	{
	160	struct lttng_kernel_syscall_mask kmask_len, *kmask = NULL;
	161	size_t array_alloc_len;
	162	char *new_mask;
	163	int ret = 0;
	164
	165	if (!syscall_mask) {
	166	ret = -1;
	167	goto end;
	168	}
	169
	170	if (!nr_bits) {
	171	ret = -1;
	172	goto end;
	173	}
	174
	175	kmask_len.len = 0;
9bb29afd	176	ret = LTTNG_IOCTL(fd, LTTNG_KERNEL_SYSCALL_MASK, &kmask_len);
46820c8b MD	177	if (ret) {
	178	goto end;
	179	}
	180
	181	array_alloc_len = ALIGN(kmask_len.len, 8) >> 3;
834978fd	182
46820c8b MD	183	kmask = zmalloc(sizeof(*kmask) + array_alloc_len);
	184	if (!kmask) {
	185	ret = -1;
	186	goto end;
	187	}
	188
	189	kmask->len = kmask_len.len;
9bb29afd	190	ret = LTTNG_IOCTL(fd, LTTNG_KERNEL_SYSCALL_MASK, kmask);
46820c8b MD	191	if (ret) {
	192	goto end;
	193	}
	194
834978fd	195	new_mask = realloc(*syscall_mask, array_alloc_len);
46820c8b MD	196	if (!new_mask) {
	197	ret = -1;
	198	goto end;
	199	}
	200	memcpy(new_mask, kmask->mask, array_alloc_len);
	201	*syscall_mask = new_mask;
	202	*nr_bits = kmask->len;
	203
	204	end:
	205	free(kmask);
	206	return ret;
	207	}
	208
ccf10263 MD	209	int kernctl_track_pid(int fd, int pid)
ccf10263 MD	210	{
9bb29afd	211	return LTTNG_IOCTL(fd, LTTNG_KERNEL_SESSION_TRACK_PID, pid);
ccf10263 MD	212	}
	213
	214	int kernctl_untrack_pid(int fd, int pid)
	215	{
9bb29afd	216	return LTTNG_IOCTL(fd, LTTNG_KERNEL_SESSION_UNTRACK_PID, pid);
ccf10263 MD	217	}
ccf10263 MD	218
a5dfbb9d MD	219	int kernctl_list_tracker_pids(int fd)
	220	{
	221	return ioctl(fd, LTTNG_KERNEL_SESSION_LIST_TRACKER_PIDS);
	222	}
	223
93ec662e JD	224	int kernctl_session_metadata_regenerate(int fd)
93ec662e JD	225	{
9bb29afd	226	return LTTNG_IOCTL(fd, LTTNG_KERNEL_SESSION_METADATA_REGEN);
93ec662e JD	227	}
93ec662e JD	228
964ccb60	229	int kernctl_create_stream(int fd)
16421f6e	230	{
4dbc372b JD	231	return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_STREAM,
4dbc372b JD	232	LTTNG_KERNEL_STREAM);
16421f6e DG	233	}
16421f6e DG	234
964ccb60	235	int kernctl_create_event(int fd, struct lttng_kernel_event *ev)
16421f6e	236	{
4dbc372b JD	237	if (lttng_kernel_use_old_abi) {
	238	struct lttng_kernel_old_event old_event;
	239
a4999208	240	memset(&old_event, 0, sizeof(old_event));
4dbc372b JD	241	memcpy(old_event.name, ev->name, sizeof(old_event.name));
	242	old_event.instrumentation = ev->instrumentation;
	243	switch (ev->instrumentation) {
	244	case LTTNG_KERNEL_KPROBE:
	245	old_event.u.kprobe.addr = ev->u.kprobe.addr;
	246	old_event.u.kprobe.offset = ev->u.kprobe.offset;
	247	memcpy(old_event.u.kprobe.symbol_name,
	248	ev->u.kprobe.symbol_name,
	249	sizeof(old_event.u.kprobe.symbol_name));
	250	break;
	251	case LTTNG_KERNEL_KRETPROBE:
	252	old_event.u.kretprobe.addr = ev->u.kretprobe.addr;
	253	old_event.u.kretprobe.offset = ev->u.kretprobe.offset;
	254	memcpy(old_event.u.kretprobe.symbol_name,
	255	ev->u.kretprobe.symbol_name,
	256	sizeof(old_event.u.kretprobe.symbol_name));
	257	break;
	258	case LTTNG_KERNEL_FUNCTION:
	259	memcpy(old_event.u.ftrace.symbol_name,
	260	ev->u.ftrace.symbol_name,
	261	sizeof(old_event.u.ftrace.symbol_name));
	262	break;
	263	default:
	264	break;
	265	}
	266
	267	return ioctl(fd, LTTNG_KERNEL_OLD_EVENT, &old_event);
	268	}
964ccb60	269	return ioctl(fd, LTTNG_KERNEL_EVENT, ev);
16421f6e DG	270	}
16421f6e DG	271
964ccb60	272	int kernctl_add_context(int fd, struct lttng_kernel_context *ctx)
16421f6e	273	{
4dbc372b JD	274	if (lttng_kernel_use_old_abi) {
	275	struct lttng_kernel_old_context old_ctx;
	276
a4999208	277	memset(&old_ctx, 0, sizeof(old_ctx));
4dbc372b JD	278	old_ctx.ctx = ctx->ctx;
4dbc372b JD	279	/* only type that uses the union */
aa3514e9	280	if (ctx->ctx == LTTNG_KERNEL_CONTEXT_PERF_CPU_COUNTER) {
4dbc372b JD	281	old_ctx.u.perf_counter.type =
	282	ctx->u.perf_counter.type;
	283	old_ctx.u.perf_counter.config =
	284	ctx->u.perf_counter.config;
	285	memcpy(old_ctx.u.perf_counter.name,
	286	ctx->u.perf_counter.name,
	287	sizeof(old_ctx.u.perf_counter.name));
	288	}
9bb29afd	289	return LTTNG_IOCTL(fd, LTTNG_KERNEL_OLD_CONTEXT, &old_ctx);
4dbc372b	290	}
9bb29afd	291	return LTTNG_IOCTL(fd, LTTNG_KERNEL_CONTEXT, ctx);
16421f6e DG	292	}
16421f6e DG	293
964ccb60	294
9bb29afd	295	/* Enable event, channel and session LTTNG_IOCTL */
f3ed775e DG	296	int kernctl_enable(int fd)
f3ed775e DG	297	{
4dbc372b JD	298	return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_ENABLE,
4dbc372b JD	299	LTTNG_KERNEL_ENABLE);
f3ed775e DG	300	}
f3ed775e DG	301
9bb29afd	302	/* Disable event, channel and session LTTNG_IOCTL */
f3ed775e DG	303	int kernctl_disable(int fd)
f3ed775e DG	304	{
4dbc372b JD	305	return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_DISABLE,
4dbc372b JD	306	LTTNG_KERNEL_DISABLE);
f3ed775e DG	307	}
f3ed775e DG	308
964ccb60	309	int kernctl_start_session(int fd)
16421f6e	310	{
4dbc372b JD	311	return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_SESSION_START,
4dbc372b JD	312	LTTNG_KERNEL_SESSION_START);
964ccb60 MD	313	}
	314
	315	int kernctl_stop_session(int fd)
	316	{
4dbc372b JD	317	return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_SESSION_STOP,
4dbc372b JD	318	LTTNG_KERNEL_SESSION_STOP);
16421f6e DG	319	}
16421f6e DG	320
00a62084 MD	321	int kernctl_filter(int fd, struct lttng_filter_bytecode *filter)
	322	{
	323	struct lttng_kernel_filter_bytecode *kb;
	324	uint32_t len;
	325	int ret;
	326
	327	/* Translate bytecode to kernel bytecode */
	328	kb = zmalloc(sizeof(*kb) + filter->len);
	329	if (!kb)
	330	return -ENOMEM;
	331	kb->len = len = filter->len;
	332	kb->reloc_offset = filter->reloc_table_offset;
	333	kb->seqnum = filter->seqnum;
	334	memcpy(kb->data, filter->data, len);
9bb29afd	335	ret = LTTNG_IOCTL(fd, LTTNG_KERNEL_FILTER, kb);
00a62084 MD	336	free(kb);
	337	return ret;
	338	}
	339
964ccb60 MD	340	int kernctl_tracepoint_list(int fd)
964ccb60 MD	341	{
4dbc372b JD	342	return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_TRACEPOINT_LIST,
4dbc372b JD	343	LTTNG_KERNEL_TRACEPOINT_LIST);
964ccb60 MD	344	}
964ccb60 MD	345
d02666a9 MD	346	int kernctl_syscall_list(int fd)
	347	{
	348	return ioctl(fd, LTTNG_KERNEL_SYSCALL_LIST);
	349	}
	350
964ccb60 MD	351	int kernctl_tracer_version(int fd, struct lttng_kernel_tracer_version *v)
964ccb60 MD	352	{
4dbc372b JD	353	int ret;
	354
	355	if (lttng_kernel_use_old_abi == -1) {
9bb29afd	356	ret = LTTNG_IOCTL(fd, LTTNG_KERNEL_TRACER_VERSION, v);
4dbc372b JD	357	if (!ret) {
	358	lttng_kernel_use_old_abi = 0;
	359	goto end;
	360	}
	361	lttng_kernel_use_old_abi = 1;
	362	}
	363	if (lttng_kernel_use_old_abi) {
	364	struct lttng_kernel_old_tracer_version old_v;
	365
9bb29afd	366	ret = LTTNG_IOCTL(fd, LTTNG_KERNEL_OLD_TRACER_VERSION, &old_v);
4dbc372b JD	367	if (ret) {
	368	goto end;
	369	}
	370	v->major = old_v.major;
	371	v->minor = old_v.minor;
	372	v->patchlevel = old_v.patchlevel;
	373	} else {
9bb29afd	374	ret = LTTNG_IOCTL(fd, LTTNG_KERNEL_TRACER_VERSION, v);
4dbc372b JD	375	}
	376
	377	end:
	378	return ret;
964ccb60 MD	379	}
964ccb60 MD	380
c052142c MD	381	int kernctl_tracer_abi_version(int fd,
	382	struct lttng_kernel_tracer_abi_version *v)
	383	{
9bb29afd	384	return LTTNG_IOCTL(fd, LTTNG_KERNEL_TRACER_ABI_VERSION, v);
c052142c MD	385	}
c052142c MD	386
964ccb60 MD	387	int kernctl_wait_quiescent(int fd)
964ccb60 MD	388	{
4dbc372b JD	389	return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_WAIT_QUIESCENT,
4dbc372b JD	390	LTTNG_KERNEL_WAIT_QUIESCENT);
964ccb60 MD	391	}
	392
	393	int kernctl_calibrate(int fd, struct lttng_kernel_calibrate *calibrate)
	394	{
4dbc372b JD	395	int ret;
	396
	397	if (lttng_kernel_use_old_abi == -1) {
9bb29afd	398	ret = LTTNG_IOCTL(fd, LTTNG_KERNEL_CALIBRATE, calibrate);
4dbc372b JD	399	if (!ret) {
	400	lttng_kernel_use_old_abi = 0;
	401	goto end;
	402	}
	403	lttng_kernel_use_old_abi = 1;
	404	}
	405	if (lttng_kernel_use_old_abi) {
	406	struct lttng_kernel_old_calibrate old_calibrate;
	407
	408	old_calibrate.type = calibrate->type;
9bb29afd JG	409	ret = LTTNG_IOCTL(fd, LTTNG_KERNEL_OLD_CALIBRATE,
9bb29afd JG	410	&old_calibrate);
4dbc372b JD	411	if (ret) {
	412	goto end;
	413	}
	414	calibrate->type = old_calibrate.type;
	415	} else {
9bb29afd	416	ret = LTTNG_IOCTL(fd, LTTNG_KERNEL_CALIBRATE, calibrate);
4dbc372b JD	417	}
	418
	419	end:
	420	return ret;
964ccb60 MD	421	}
	422
	423
	424	int kernctl_buffer_flush(int fd)
	425	{
9bb29afd	426	return LTTNG_IOCTL(fd, RING_BUFFER_FLUSH);
964ccb60 MD	427	}
964ccb60 MD	428
93ec662e JD	429	/* returns the version of the metadata. */
	430	int kernctl_get_metadata_version(int fd, uint64_t *version)
	431	{
9bb29afd	432	return LTTNG_IOCTL(fd, RING_BUFFER_GET_METADATA_VERSION, version);
93ec662e JD	433	}
93ec662e JD	434
964ccb60 MD	435
	436	/* Buffer operations */
	437
	438	/* For mmap mode, readable without "get" operation */
	439
16421f6e DG	440	/* returns the length to mmap. */
	441	int kernctl_get_mmap_len(int fd, unsigned long *len)
	442	{
9bb29afd	443	return LTTNG_IOCTL(fd, RING_BUFFER_GET_MMAP_LEN, len);
16421f6e DG	444	}
16421f6e DG	445
964ccb60 MD	446	/* returns the maximum size for sub-buffers. */
	447	int kernctl_get_max_subbuf_size(int fd, unsigned long *len)
	448	{
9bb29afd	449	return LTTNG_IOCTL(fd, RING_BUFFER_GET_MAX_SUBBUF_SIZE, len);
964ccb60 MD	450	}
	451
	452	/*
	453	* For mmap mode, operate on the current packet (between get/put or
	454	* get_next/put_next).
	455	*/
	456
16421f6e DG	457	/* returns the offset of the subbuffer belonging to the mmap reader. */
	458	int kernctl_get_mmap_read_offset(int fd, unsigned long *off)
	459	{
9bb29afd	460	return LTTNG_IOCTL(fd, RING_BUFFER_GET_MMAP_READ_OFFSET, off);
16421f6e DG	461	}
16421f6e DG	462
964ccb60 MD	463	/* returns the size of the current sub-buffer, without padding (for mmap). */
964ccb60 MD	464	int kernctl_get_subbuf_size(int fd, unsigned long *len)
16421f6e	465	{
9bb29afd	466	return LTTNG_IOCTL(fd, RING_BUFFER_GET_SUBBUF_SIZE, len);
16421f6e DG	467	}
	468
	469	/* returns the size of the current sub-buffer, without padding (for mmap). */
	470	int kernctl_get_padded_subbuf_size(int fd, unsigned long *len)
	471	{
9bb29afd	472	return LTTNG_IOCTL(fd, RING_BUFFER_GET_PADDED_SUBBUF_SIZE, len);
16421f6e DG	473	}
16421f6e DG	474
964ccb60 MD	475	/* Get exclusive read access to the next sub-buffer that can be read. */
964ccb60 MD	476	int kernctl_get_next_subbuf(int fd)
16421f6e	477	{
9bb29afd	478	return LTTNG_IOCTL(fd, RING_BUFFER_GET_NEXT_SUBBUF);
16421f6e DG	479	}
16421f6e DG	480
d4a1283e	481
16421f6e DG	482	/* Release exclusive sub-buffer access, move consumer forward. */
	483	int kernctl_put_next_subbuf(int fd)
	484	{
9bb29afd	485	return LTTNG_IOCTL(fd, RING_BUFFER_PUT_NEXT_SUBBUF);
16421f6e DG	486	}
16421f6e DG	487
964ccb60	488	/* snapshot */
16421f6e DG	489
	490	/* Get a snapshot of the current ring buffer producer and consumer positions */
	491	int kernctl_snapshot(int fd)
	492	{
9bb29afd	493	return LTTNG_IOCTL(fd, RING_BUFFER_SNAPSHOT);
16421f6e DG	494	}
	495
	496	/* Get the consumer position (iteration start) */
	497	int kernctl_snapshot_get_consumed(int fd, unsigned long *pos)
	498	{
9bb29afd	499	return LTTNG_IOCTL(fd, RING_BUFFER_SNAPSHOT_GET_CONSUMED, pos);
16421f6e DG	500	}
	501
	502	/* Get the producer position (iteration end) */
	503	int kernctl_snapshot_get_produced(int fd, unsigned long *pos)
	504	{
9bb29afd	505	return LTTNG_IOCTL(fd, RING_BUFFER_SNAPSHOT_GET_PRODUCED, pos);
16421f6e DG	506	}
16421f6e DG	507
964ccb60 MD	508	/* Get exclusive read access to the specified sub-buffer position */
964ccb60 MD	509	int kernctl_get_subbuf(int fd, unsigned long *len)
f3ed775e	510	{
9bb29afd	511	return LTTNG_IOCTL(fd, RING_BUFFER_GET_SUBBUF, len);
f3ed775e	512	}
d0254c7c	513
964ccb60 MD	514	/* Release exclusive sub-buffer access */
964ccb60 MD	515	int kernctl_put_subbuf(int fd)
d0254c7c	516	{
9bb29afd	517	return LTTNG_IOCTL(fd, RING_BUFFER_PUT_SUBBUF);
d0254c7c	518	}
309167d2 JD	519
	520	/* Returns the timestamp begin of the current sub-buffer. */
	521	int kernctl_get_timestamp_begin(int fd, uint64_t *timestamp_begin)
	522	{
9bb29afd JG	523	return LTTNG_IOCTL(fd, LTTNG_RING_BUFFER_GET_TIMESTAMP_BEGIN,
9bb29afd JG	524	timestamp_begin);
309167d2 JD	525	}
	526
	527	/* Returns the timestamp end of the current sub-buffer. */
	528	int kernctl_get_timestamp_end(int fd, uint64_t *timestamp_end)
	529	{
9bb29afd JG	530	return LTTNG_IOCTL(fd, LTTNG_RING_BUFFER_GET_TIMESTAMP_END,
9bb29afd JG	531	timestamp_end);
309167d2 JD	532	}
	533
	534	/* Returns the number of discarded events in the current sub-buffer. */
	535	int kernctl_get_events_discarded(int fd, uint64_t *events_discarded)
	536	{
9bb29afd JG	537	return LTTNG_IOCTL(fd, LTTNG_RING_BUFFER_GET_EVENTS_DISCARDED,
9bb29afd JG	538	events_discarded);
309167d2 JD	539	}
	540
	541	/* Returns the content size in the current sub-buffer. */
	542	int kernctl_get_content_size(int fd, uint64_t *content_size)
	543	{
9bb29afd JG	544	return LTTNG_IOCTL(fd, LTTNG_RING_BUFFER_GET_CONTENT_SIZE,
9bb29afd JG	545	content_size);
309167d2 JD	546	}
	547
	548	/* Returns the packet size in the current sub-buffer. */
	549	int kernctl_get_packet_size(int fd, uint64_t *packet_size)
	550	{
9bb29afd	551	return LTTNG_IOCTL(fd, LTTNG_RING_BUFFER_GET_PACKET_SIZE, packet_size);
309167d2 JD	552	}
	553
	554	/* Returns the stream id of the current sub-buffer. */
	555	int kernctl_get_stream_id(int fd, uint64_t *stream_id)
	556	{
9bb29afd	557	return LTTNG_IOCTL(fd, LTTNG_RING_BUFFER_GET_STREAM_ID, stream_id);
309167d2	558	}
d3e2ba59 JD	559
	560	/* Returns the current timestamp. */
	561	int kernctl_get_current_timestamp(int fd, uint64_t *ts)
	562	{
9bb29afd	563	return LTTNG_IOCTL(fd, LTTNG_RING_BUFFER_GET_CURRENT_TIMESTAMP, ts);
d3e2ba59	564	}
fb83fe64 JD	565
	566	/* Returns the packet sequence number of the current sub-buffer. */
	567	int kernctl_get_sequence_number(int fd, uint64_t *seq)
	568	{
9bb29afd	569	return LTTNG_IOCTL(fd, LTTNG_RING_BUFFER_GET_SEQ_NUM, seq);
fb83fe64	570	}
000fa86f JD	571
	572	/* Returns the stream instance id. */
	573	int kernctl_get_instance_id(int fd, uint64_t *id)
	574	{
9bb29afd	575	return LTTNG_IOCTL(fd, LTTNG_RING_BUFFER_INSTANCE_ID, id);
000fa86f	576	}