[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>
 *
 * 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 _GNU_SOURCE
#define _LGPL_SOURCE
#define __USE_LINUX_IOCTL_DEFS
#include <sys/ioctl.h>
#include <string.h>
#include <common/align.h>
#include <errno.h>

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

/*
 * 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 = 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 = 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 ioctl(fd, LTTNG_KERNEL_SESSION_TRACK_PID, pid);
}

int kernctl_untrack_pid(int fd, int pid)
{
	return 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_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 ioctl(fd, LTTNG_KERNEL_OLD_CONTEXT, &old_ctx);
	}
	return ioctl(fd, LTTNG_KERNEL_CONTEXT, ctx);
}


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

/* Disable event, channel and session 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 = 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 = 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 = 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 = 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 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 = 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 = ioctl(fd, LTTNG_KERNEL_OLD_CALIBRATE, &old_calibrate);
		if (ret) {
			goto end;
		}
		calibrate->type = old_calibrate.type;
	} else {
		ret = ioctl(fd, LTTNG_KERNEL_CALIBRATE, calibrate);
	}

end:
	return ret;
}


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


/* 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 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 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 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 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 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 ioctl(fd, RING_BUFFER_GET_NEXT_SUBBUF);
}


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

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

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