[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_old_channel old_channel;
	struct lttng_kernel_channel channel;

	if (lttng_kernel_use_old_abi) {
		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);
	}

	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;

		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;

		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>
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>
00a62084	25	#include <errno.h>
a6bd6d9b JG	26	#include <stdarg.h>
a6bd6d9b JG	27	#include <assert.h>
16421f6e	28
10a8a223	29	#include "kernel-ctl.h"
16421f6e	30	#include "kernel-ioctl.h"
16421f6e	31
a6bd6d9b 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_old_channel old_channel;
	88	struct lttng_kernel_channel channel;
	89
	90	if (lttng_kernel_use_old_abi) {
	91	old_channel.overwrite = chops->overwrite;
	92	old_channel.subbuf_size = chops->subbuf_size;
	93	old_channel.num_subbuf = chops->num_subbuf;
	94	old_channel.switch_timer_interval = chops->switch_timer_interval;
	95	old_channel.read_timer_interval = chops->read_timer_interval;
	96	old_channel.output = chops->output;
f853c53a DG	97
	98	memset(old_channel.padding, 0, sizeof(old_channel.padding));
	99	/*
	100	* The new channel padding is smaller than the old ABI so we use the
	101	* new ABI padding size for the memcpy.
	102	*/
	103	memcpy(old_channel.padding, chops->padding, sizeof(chops->padding));
4dbc372b JD	104
	105	return ioctl(fd, LTTNG_KERNEL_OLD_METADATA, &old_channel);
	106	}
	107
	108	channel.overwrite = chops->overwrite;
	109	channel.subbuf_size = chops->subbuf_size;
	110	channel.num_subbuf = chops->num_subbuf;
	111	channel.switch_timer_interval = chops->switch_timer_interval;
	112	channel.read_timer_interval = chops->read_timer_interval;
	113	channel.output = chops->output;
ea207e3b	114	memcpy(channel.padding, chops->padding, sizeof(chops->padding));
4dbc372b JD	115
4dbc372b JD	116	return ioctl(fd, LTTNG_KERNEL_METADATA, &channel);
f3ed775e DG	117	}
	118
	119	int kernctl_create_channel(int fd, struct lttng_channel_attr *chops)
16421f6e	120	{
4dbc372b JD	121	struct lttng_kernel_channel channel;
4dbc372b JD	122
c74101ef	123	memset(&channel, 0, sizeof(channel));
4dbc372b JD	124	if (lttng_kernel_use_old_abi) {
	125	struct lttng_kernel_old_channel old_channel;
	126
	127	old_channel.overwrite = chops->overwrite;
	128	old_channel.subbuf_size = chops->subbuf_size;
	129	old_channel.num_subbuf = chops->num_subbuf;
	130	old_channel.switch_timer_interval = chops->switch_timer_interval;
	131	old_channel.read_timer_interval = chops->read_timer_interval;
	132	old_channel.output = chops->output;
f853c53a DG	133
	134	memset(old_channel.padding, 0, sizeof(old_channel.padding));
	135	/*
	136	* The new channel padding is smaller than the old ABI so we use the
	137	* new ABI padding size for the memcpy.
	138	*/
	139	memcpy(old_channel.padding, chops->padding, sizeof(chops->padding));
4dbc372b JD	140
	141	return ioctl(fd, LTTNG_KERNEL_OLD_CHANNEL, &old_channel);
	142	}
	143
	144	channel.overwrite = chops->overwrite;
	145	channel.subbuf_size = chops->subbuf_size;
	146	channel.num_subbuf = chops->num_subbuf;
	147	channel.switch_timer_interval = chops->switch_timer_interval;
	148	channel.read_timer_interval = chops->read_timer_interval;
	149	channel.output = chops->output;
ea207e3b	150	memcpy(channel.padding, chops->padding, sizeof(chops->padding));
4dbc372b JD	151
4dbc372b JD	152	return ioctl(fd, LTTNG_KERNEL_CHANNEL, &channel);
16421f6e DG	153	}
16421f6e DG	154
46820c8b MD	155	int kernctl_syscall_mask(int fd, char *syscall_mask, uint32_t nr_bits)
	156	{
	157	struct lttng_kernel_syscall_mask kmask_len, *kmask = NULL;
	158	size_t array_alloc_len;
	159	char *new_mask;
	160	int ret = 0;
	161
	162	if (!syscall_mask) {
	163	ret = -1;
	164	goto end;
	165	}
	166
	167	if (!nr_bits) {
	168	ret = -1;
	169	goto end;
	170	}
	171
	172	kmask_len.len = 0;
a6bd6d9b	173	ret = LTTNG_IOCTL(fd, LTTNG_KERNEL_SYSCALL_MASK, &kmask_len);
46820c8b MD	174	if (ret) {
	175	goto end;
	176	}
	177
	178	array_alloc_len = ALIGN(kmask_len.len, 8) >> 3;
834978fd	179
46820c8b MD	180	kmask = zmalloc(sizeof(*kmask) + array_alloc_len);
	181	if (!kmask) {
	182	ret = -1;
	183	goto end;
	184	}
	185
	186	kmask->len = kmask_len.len;
a6bd6d9b	187	ret = LTTNG_IOCTL(fd, LTTNG_KERNEL_SYSCALL_MASK, kmask);
46820c8b MD	188	if (ret) {
	189	goto end;
	190	}
	191
834978fd	192	new_mask = realloc(*syscall_mask, array_alloc_len);
46820c8b MD	193	if (!new_mask) {
	194	ret = -1;
	195	goto end;
	196	}
	197	memcpy(new_mask, kmask->mask, array_alloc_len);
	198	*syscall_mask = new_mask;
	199	*nr_bits = kmask->len;
	200
	201	end:
	202	free(kmask);
	203	return ret;
	204	}
	205
ccf10263 MD	206	int kernctl_track_pid(int fd, int pid)
ccf10263 MD	207	{
a6bd6d9b	208	return LTTNG_IOCTL(fd, LTTNG_KERNEL_SESSION_TRACK_PID, pid);
ccf10263 MD	209	}
	210
	211	int kernctl_untrack_pid(int fd, int pid)
	212	{
a6bd6d9b	213	return LTTNG_IOCTL(fd, LTTNG_KERNEL_SESSION_UNTRACK_PID, pid);
ccf10263 MD	214	}
ccf10263 MD	215
a5dfbb9d MD	216	int kernctl_list_tracker_pids(int fd)
	217	{
	218	return ioctl(fd, LTTNG_KERNEL_SESSION_LIST_TRACKER_PIDS);
	219	}
	220
93ec662e JD	221	int kernctl_session_metadata_regenerate(int fd)
93ec662e JD	222	{
a6bd6d9b	223	return LTTNG_IOCTL(fd, LTTNG_KERNEL_SESSION_METADATA_REGEN);
93ec662e JD	224	}
93ec662e JD	225
964ccb60	226	int kernctl_create_stream(int fd)
16421f6e	227	{
4dbc372b JD	228	return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_STREAM,
4dbc372b JD	229	LTTNG_KERNEL_STREAM);
16421f6e DG	230	}
16421f6e DG	231
964ccb60	232	int kernctl_create_event(int fd, struct lttng_kernel_event *ev)
16421f6e	233	{
4dbc372b JD	234	if (lttng_kernel_use_old_abi) {
	235	struct lttng_kernel_old_event old_event;
	236
	237	memcpy(old_event.name, ev->name, sizeof(old_event.name));
	238	old_event.instrumentation = ev->instrumentation;
	239	switch (ev->instrumentation) {
	240	case LTTNG_KERNEL_KPROBE:
	241	old_event.u.kprobe.addr = ev->u.kprobe.addr;
	242	old_event.u.kprobe.offset = ev->u.kprobe.offset;
	243	memcpy(old_event.u.kprobe.symbol_name,
	244	ev->u.kprobe.symbol_name,
	245	sizeof(old_event.u.kprobe.symbol_name));
	246	break;
	247	case LTTNG_KERNEL_KRETPROBE:
	248	old_event.u.kretprobe.addr = ev->u.kretprobe.addr;
	249	old_event.u.kretprobe.offset = ev->u.kretprobe.offset;
	250	memcpy(old_event.u.kretprobe.symbol_name,
	251	ev->u.kretprobe.symbol_name,
	252	sizeof(old_event.u.kretprobe.symbol_name));
	253	break;
	254	case LTTNG_KERNEL_FUNCTION:
	255	memcpy(old_event.u.ftrace.symbol_name,
	256	ev->u.ftrace.symbol_name,
	257	sizeof(old_event.u.ftrace.symbol_name));
	258	break;
	259	default:
	260	break;
	261	}
	262
	263	return ioctl(fd, LTTNG_KERNEL_OLD_EVENT, &old_event);
	264	}
964ccb60	265	return ioctl(fd, LTTNG_KERNEL_EVENT, ev);
16421f6e DG	266	}
16421f6e DG	267
964ccb60	268	int kernctl_add_context(int fd, struct lttng_kernel_context *ctx)
16421f6e	269	{
4dbc372b JD	270	if (lttng_kernel_use_old_abi) {
	271	struct lttng_kernel_old_context old_ctx;
	272
	273	old_ctx.ctx = ctx->ctx;
	274	/* only type that uses the union */
aa3514e9	275	if (ctx->ctx == LTTNG_KERNEL_CONTEXT_PERF_CPU_COUNTER) {
4dbc372b JD	276	old_ctx.u.perf_counter.type =
	277	ctx->u.perf_counter.type;
	278	old_ctx.u.perf_counter.config =
	279	ctx->u.perf_counter.config;
	280	memcpy(old_ctx.u.perf_counter.name,
	281	ctx->u.perf_counter.name,
	282	sizeof(old_ctx.u.perf_counter.name));
	283	}
a6bd6d9b	284	return LTTNG_IOCTL(fd, LTTNG_KERNEL_OLD_CONTEXT, &old_ctx);
4dbc372b	285	}
a6bd6d9b	286	return LTTNG_IOCTL(fd, LTTNG_KERNEL_CONTEXT, ctx);
16421f6e DG	287	}
16421f6e DG	288
964ccb60	289
a6bd6d9b	290	/* Enable event, channel and session LTTNG_IOCTL */
f3ed775e DG	291	int kernctl_enable(int fd)
f3ed775e DG	292	{
4dbc372b JD	293	return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_ENABLE,
4dbc372b JD	294	LTTNG_KERNEL_ENABLE);
f3ed775e DG	295	}
f3ed775e DG	296
a6bd6d9b	297	/* Disable event, channel and session LTTNG_IOCTL */
f3ed775e DG	298	int kernctl_disable(int fd)
f3ed775e DG	299	{
4dbc372b JD	300	return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_DISABLE,
4dbc372b JD	301	LTTNG_KERNEL_DISABLE);
f3ed775e DG	302	}
f3ed775e DG	303
964ccb60	304	int kernctl_start_session(int fd)
16421f6e	305	{
4dbc372b JD	306	return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_SESSION_START,
4dbc372b JD	307	LTTNG_KERNEL_SESSION_START);
964ccb60 MD	308	}
	309
	310	int kernctl_stop_session(int fd)
	311	{
4dbc372b JD	312	return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_SESSION_STOP,
4dbc372b JD	313	LTTNG_KERNEL_SESSION_STOP);
16421f6e DG	314	}
16421f6e DG	315
00a62084 MD	316	int kernctl_filter(int fd, struct lttng_filter_bytecode *filter)
	317	{
	318	struct lttng_kernel_filter_bytecode *kb;
	319	uint32_t len;
	320	int ret;
	321
	322	/* Translate bytecode to kernel bytecode */
	323	kb = zmalloc(sizeof(*kb) + filter->len);
	324	if (!kb)
	325	return -ENOMEM;
	326	kb->len = len = filter->len;
	327	kb->reloc_offset = filter->reloc_table_offset;
	328	kb->seqnum = filter->seqnum;
	329	memcpy(kb->data, filter->data, len);
a6bd6d9b	330	ret = LTTNG_IOCTL(fd, LTTNG_KERNEL_FILTER, kb);
00a62084 MD	331	free(kb);
	332	return ret;
	333	}
	334
964ccb60 MD	335	int kernctl_tracepoint_list(int fd)
964ccb60 MD	336	{
4dbc372b JD	337	return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_TRACEPOINT_LIST,
4dbc372b JD	338	LTTNG_KERNEL_TRACEPOINT_LIST);
964ccb60 MD	339	}
964ccb60 MD	340
d02666a9 MD	341	int kernctl_syscall_list(int fd)
	342	{
	343	return ioctl(fd, LTTNG_KERNEL_SYSCALL_LIST);
	344	}
	345
964ccb60 MD	346	int kernctl_tracer_version(int fd, struct lttng_kernel_tracer_version *v)
964ccb60 MD	347	{
4dbc372b JD	348	int ret;
	349
	350	if (lttng_kernel_use_old_abi == -1) {
a6bd6d9b	351	ret = LTTNG_IOCTL(fd, LTTNG_KERNEL_TRACER_VERSION, v);
4dbc372b JD	352	if (!ret) {
	353	lttng_kernel_use_old_abi = 0;
	354	goto end;
	355	}
	356	lttng_kernel_use_old_abi = 1;
	357	}
	358	if (lttng_kernel_use_old_abi) {
	359	struct lttng_kernel_old_tracer_version old_v;
	360
a6bd6d9b	361	ret = LTTNG_IOCTL(fd, LTTNG_KERNEL_OLD_TRACER_VERSION, &old_v);
4dbc372b JD	362	if (ret) {
	363	goto end;
	364	}
	365	v->major = old_v.major;
	366	v->minor = old_v.minor;
	367	v->patchlevel = old_v.patchlevel;
	368	} else {
a6bd6d9b	369	ret = LTTNG_IOCTL(fd, LTTNG_KERNEL_TRACER_VERSION, v);
4dbc372b JD	370	}
	371
	372	end:
	373	return ret;
964ccb60 MD	374	}
964ccb60 MD	375
c052142c MD	376	int kernctl_tracer_abi_version(int fd,
	377	struct lttng_kernel_tracer_abi_version *v)
	378	{
a6bd6d9b	379	return LTTNG_IOCTL(fd, LTTNG_KERNEL_TRACER_ABI_VERSION, v);
c052142c MD	380	}
c052142c MD	381
964ccb60 MD	382	int kernctl_wait_quiescent(int fd)
964ccb60 MD	383	{
4dbc372b JD	384	return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_WAIT_QUIESCENT,
4dbc372b JD	385	LTTNG_KERNEL_WAIT_QUIESCENT);
964ccb60 MD	386	}
	387
	388	int kernctl_calibrate(int fd, struct lttng_kernel_calibrate *calibrate)
	389	{
4dbc372b JD	390	int ret;
	391
	392	if (lttng_kernel_use_old_abi == -1) {
a6bd6d9b	393	ret = LTTNG_IOCTL(fd, LTTNG_KERNEL_CALIBRATE, calibrate);
4dbc372b JD	394	if (!ret) {
	395	lttng_kernel_use_old_abi = 0;
	396	goto end;
	397	}
	398	lttng_kernel_use_old_abi = 1;
	399	}
	400	if (lttng_kernel_use_old_abi) {
	401	struct lttng_kernel_old_calibrate old_calibrate;
	402
	403	old_calibrate.type = calibrate->type;
a6bd6d9b JG	404	ret = LTTNG_IOCTL(fd, LTTNG_KERNEL_OLD_CALIBRATE,
a6bd6d9b JG	405	&old_calibrate);
4dbc372b JD	406	if (ret) {
	407	goto end;
	408	}
	409	calibrate->type = old_calibrate.type;
	410	} else {
a6bd6d9b	411	ret = LTTNG_IOCTL(fd, LTTNG_KERNEL_CALIBRATE, calibrate);
4dbc372b JD	412	}
	413
	414	end:
	415	return ret;
964ccb60 MD	416	}
	417
	418
	419	int kernctl_buffer_flush(int fd)
	420	{
a6bd6d9b	421	return LTTNG_IOCTL(fd, RING_BUFFER_FLUSH);
964ccb60 MD	422	}
964ccb60 MD	423
93ec662e JD	424	/* returns the version of the metadata. */
	425	int kernctl_get_metadata_version(int fd, uint64_t *version)
	426	{
a6bd6d9b	427	return LTTNG_IOCTL(fd, RING_BUFFER_GET_METADATA_VERSION, version);
93ec662e JD	428	}
93ec662e JD	429
964ccb60 MD	430
	431	/* Buffer operations */
	432
	433	/* For mmap mode, readable without "get" operation */
	434
16421f6e DG	435	/* returns the length to mmap. */
	436	int kernctl_get_mmap_len(int fd, unsigned long *len)
	437	{
a6bd6d9b	438	return LTTNG_IOCTL(fd, RING_BUFFER_GET_MMAP_LEN, len);
16421f6e DG	439	}
16421f6e DG	440
964ccb60 MD	441	/* returns the maximum size for sub-buffers. */
	442	int kernctl_get_max_subbuf_size(int fd, unsigned long *len)
	443	{
a6bd6d9b	444	return LTTNG_IOCTL(fd, RING_BUFFER_GET_MAX_SUBBUF_SIZE, len);
964ccb60 MD	445	}
	446
	447	/*
	448	* For mmap mode, operate on the current packet (between get/put or
	449	* get_next/put_next).
	450	*/
	451
16421f6e DG	452	/* returns the offset of the subbuffer belonging to the mmap reader. */
	453	int kernctl_get_mmap_read_offset(int fd, unsigned long *off)
	454	{
a6bd6d9b	455	return LTTNG_IOCTL(fd, RING_BUFFER_GET_MMAP_READ_OFFSET, off);
16421f6e DG	456	}
16421f6e DG	457
964ccb60 MD	458	/* returns the size of the current sub-buffer, without padding (for mmap). */
964ccb60 MD	459	int kernctl_get_subbuf_size(int fd, unsigned long *len)
16421f6e	460	{
a6bd6d9b	461	return LTTNG_IOCTL(fd, RING_BUFFER_GET_SUBBUF_SIZE, len);
16421f6e DG	462	}
	463
	464	/* returns the size of the current sub-buffer, without padding (for mmap). */
	465	int kernctl_get_padded_subbuf_size(int fd, unsigned long *len)
	466	{
a6bd6d9b	467	return LTTNG_IOCTL(fd, RING_BUFFER_GET_PADDED_SUBBUF_SIZE, len);
16421f6e DG	468	}
16421f6e DG	469
964ccb60 MD	470	/* Get exclusive read access to the next sub-buffer that can be read. */
964ccb60 MD	471	int kernctl_get_next_subbuf(int fd)
16421f6e	472	{
a6bd6d9b	473	return LTTNG_IOCTL(fd, RING_BUFFER_GET_NEXT_SUBBUF);
16421f6e DG	474	}
16421f6e DG	475
d4a1283e	476
16421f6e DG	477	/* Release exclusive sub-buffer access, move consumer forward. */
	478	int kernctl_put_next_subbuf(int fd)
	479	{
a6bd6d9b	480	return LTTNG_IOCTL(fd, RING_BUFFER_PUT_NEXT_SUBBUF);
16421f6e DG	481	}
16421f6e DG	482
964ccb60	483	/* snapshot */
16421f6e DG	484
	485	/* Get a snapshot of the current ring buffer producer and consumer positions */
	486	int kernctl_snapshot(int fd)
	487	{
a6bd6d9b	488	return LTTNG_IOCTL(fd, RING_BUFFER_SNAPSHOT);
16421f6e DG	489	}
	490
	491	/* Get the consumer position (iteration start) */
	492	int kernctl_snapshot_get_consumed(int fd, unsigned long *pos)
	493	{
a6bd6d9b	494	return LTTNG_IOCTL(fd, RING_BUFFER_SNAPSHOT_GET_CONSUMED, pos);
16421f6e DG	495	}
	496
	497	/* Get the producer position (iteration end) */
	498	int kernctl_snapshot_get_produced(int fd, unsigned long *pos)
	499	{
a6bd6d9b	500	return LTTNG_IOCTL(fd, RING_BUFFER_SNAPSHOT_GET_PRODUCED, pos);
16421f6e DG	501	}
16421f6e DG	502
964ccb60 MD	503	/* Get exclusive read access to the specified sub-buffer position */
964ccb60 MD	504	int kernctl_get_subbuf(int fd, unsigned long *len)
f3ed775e	505	{
a6bd6d9b	506	return LTTNG_IOCTL(fd, RING_BUFFER_GET_SUBBUF, len);
f3ed775e	507	}
d0254c7c	508
964ccb60 MD	509	/* Release exclusive sub-buffer access */
964ccb60 MD	510	int kernctl_put_subbuf(int fd)
d0254c7c	511	{
a6bd6d9b	512	return LTTNG_IOCTL(fd, RING_BUFFER_PUT_SUBBUF);
d0254c7c	513	}
309167d2 JD	514
	515	/* Returns the timestamp begin of the current sub-buffer. */
	516	int kernctl_get_timestamp_begin(int fd, uint64_t *timestamp_begin)
	517	{
a6bd6d9b JG	518	return LTTNG_IOCTL(fd, LTTNG_RING_BUFFER_GET_TIMESTAMP_BEGIN,
a6bd6d9b JG	519	timestamp_begin);
309167d2 JD	520	}
	521
	522	/* Returns the timestamp end of the current sub-buffer. */
	523	int kernctl_get_timestamp_end(int fd, uint64_t *timestamp_end)
	524	{
a6bd6d9b JG	525	return LTTNG_IOCTL(fd, LTTNG_RING_BUFFER_GET_TIMESTAMP_END,
a6bd6d9b JG	526	timestamp_end);
309167d2 JD	527	}
	528
	529	/* Returns the number of discarded events in the current sub-buffer. */
	530	int kernctl_get_events_discarded(int fd, uint64_t *events_discarded)
	531	{
a6bd6d9b JG	532	return LTTNG_IOCTL(fd, LTTNG_RING_BUFFER_GET_EVENTS_DISCARDED,
a6bd6d9b JG	533	events_discarded);
309167d2 JD	534	}
	535
	536	/* Returns the content size in the current sub-buffer. */
	537	int kernctl_get_content_size(int fd, uint64_t *content_size)
	538	{
a6bd6d9b JG	539	return LTTNG_IOCTL(fd, LTTNG_RING_BUFFER_GET_CONTENT_SIZE,
a6bd6d9b JG	540	content_size);
309167d2 JD	541	}
	542
	543	/* Returns the packet size in the current sub-buffer. */
	544	int kernctl_get_packet_size(int fd, uint64_t *packet_size)
	545	{
a6bd6d9b	546	return LTTNG_IOCTL(fd, LTTNG_RING_BUFFER_GET_PACKET_SIZE, packet_size);
309167d2 JD	547	}
	548
	549	/* Returns the stream id of the current sub-buffer. */
	550	int kernctl_get_stream_id(int fd, uint64_t *stream_id)
	551	{
a6bd6d9b	552	return LTTNG_IOCTL(fd, LTTNG_RING_BUFFER_GET_STREAM_ID, stream_id);
309167d2	553	}
d3e2ba59 JD	554
	555	/* Returns the current timestamp. */
	556	int kernctl_get_current_timestamp(int fd, uint64_t *ts)
	557	{
a6bd6d9b	558	return LTTNG_IOCTL(fd, LTTNG_RING_BUFFER_GET_CURRENT_TIMESTAMP, ts);
d3e2ba59	559	}
fb83fe64 JD	560
	561	/* Returns the packet sequence number of the current sub-buffer. */
	562	int kernctl_get_sequence_number(int fd, uint64_t *seq)
	563	{
a6bd6d9b	564	return LTTNG_IOCTL(fd, LTTNG_RING_BUFFER_GET_SEQ_NUM, seq);
fb83fe64	565	}
000fa86f JD	566
	567	/* Returns the stream instance id. */
	568	int kernctl_get_instance_id(int fd, uint64_t *id)
	569	{
a6bd6d9b	570	return LTTNG_IOCTL(fd, LTTNG_RING_BUFFER_INSTANCE_ID, id);
000fa86f	571	}