[lttng-tools.git] / include / lttng / event.h

/*
 * Copyright (C) 2014 David Goulet <dgoulet@efficios.com>
 * Copyright (C) 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com>
 *
 * SPDX-License-Identifier: LGPL-2.1-only
 *
 */

#ifndef LTTNG_EVENT_H
#define LTTNG_EVENT_H

#ifdef __cplusplus
extern "C" {
#endif

#include <lttng/handle.h>
#include <lttng/userspace-probe.h>

/*
 * Instrumentation type of tracing event.
 */
enum lttng_event_type {
	LTTNG_EVENT_ALL                       = -1,
	LTTNG_EVENT_TRACEPOINT                = 0,
	LTTNG_EVENT_PROBE                     = 1,
	LTTNG_EVENT_FUNCTION                  = 2,
	LTTNG_EVENT_FUNCTION_ENTRY            = 3,
	LTTNG_EVENT_NOOP                      = 4,
	LTTNG_EVENT_SYSCALL                   = 5,
	LTTNG_EVENT_USERSPACE_PROBE           = 6,
};

/*
 * Loglevel information.
 */
enum lttng_loglevel_type {
	LTTNG_EVENT_LOGLEVEL_ALL              = 0,
	LTTNG_EVENT_LOGLEVEL_RANGE            = 1,
	LTTNG_EVENT_LOGLEVEL_SINGLE           = 2,
};

/*
 * Available loglevels.
 */
enum lttng_loglevel {
	LTTNG_LOGLEVEL_EMERG                  = 0,
	LTTNG_LOGLEVEL_ALERT                  = 1,
	LTTNG_LOGLEVEL_CRIT                   = 2,
	LTTNG_LOGLEVEL_ERR                    = 3,
	LTTNG_LOGLEVEL_WARNING                = 4,
	LTTNG_LOGLEVEL_NOTICE                 = 5,
	LTTNG_LOGLEVEL_INFO                   = 6,
	LTTNG_LOGLEVEL_DEBUG_SYSTEM           = 7,
	LTTNG_LOGLEVEL_DEBUG_PROGRAM          = 8,
	LTTNG_LOGLEVEL_DEBUG_PROCESS          = 9,
	LTTNG_LOGLEVEL_DEBUG_MODULE           = 10,
	LTTNG_LOGLEVEL_DEBUG_UNIT             = 11,
	LTTNG_LOGLEVEL_DEBUG_FUNCTION         = 12,
	LTTNG_LOGLEVEL_DEBUG_LINE             = 13,
	LTTNG_LOGLEVEL_DEBUG                  = 14,
};

/*
 * Available loglevels for the JUL domain. Those are an exact map from the
 * class java.util.logging.Level.
 */
enum lttng_loglevel_jul {
	LTTNG_LOGLEVEL_JUL_OFF                = INT32_MAX,
	LTTNG_LOGLEVEL_JUL_SEVERE             = 1000,
	LTTNG_LOGLEVEL_JUL_WARNING            = 900,
	LTTNG_LOGLEVEL_JUL_INFO               = 800,
	LTTNG_LOGLEVEL_JUL_CONFIG             = 700,
	LTTNG_LOGLEVEL_JUL_FINE               = 500,
	LTTNG_LOGLEVEL_JUL_FINER              = 400,
	LTTNG_LOGLEVEL_JUL_FINEST             = 300,
	LTTNG_LOGLEVEL_JUL_ALL                = INT32_MIN,
};

/*
 * Available loglevels for the LOG4j domain. Those are an exact map from the
 * class org.apache.log4j.Level.
 */
enum lttng_loglevel_log4j {
	LTTNG_LOGLEVEL_LOG4J_OFF              = INT32_MAX,
	LTTNG_LOGLEVEL_LOG4J_FATAL            = 50000,
	LTTNG_LOGLEVEL_LOG4J_ERROR            = 40000,
	LTTNG_LOGLEVEL_LOG4J_WARN             = 30000,
	LTTNG_LOGLEVEL_LOG4J_INFO             = 20000,
	LTTNG_LOGLEVEL_LOG4J_DEBUG            = 10000,
	LTTNG_LOGLEVEL_LOG4J_TRACE            = 5000,
	LTTNG_LOGLEVEL_LOG4J_ALL              = INT32_MIN,
};

/*
 * Available loglevels for the Python domain. Those are an exact map from the
 * Level class.
 */
enum lttng_loglevel_python {
	LTTNG_LOGLEVEL_PYTHON_CRITICAL        = 50,
	LTTNG_LOGLEVEL_PYTHON_ERROR           = 40,
	LTTNG_LOGLEVEL_PYTHON_WARNING         = 30,
	LTTNG_LOGLEVEL_PYTHON_INFO            = 20,
	LTTNG_LOGLEVEL_PYTHON_DEBUG           = 10,
	LTTNG_LOGLEVEL_PYTHON_NOTSET          = 0,
};

/*
 * LTTng consumer mode
 */
enum lttng_event_output {
	LTTNG_EVENT_SPLICE                    = 0,
	LTTNG_EVENT_MMAP                      = 1,
};

/* Event context possible type */
enum lttng_event_context_type {
	LTTNG_EVENT_CONTEXT_PID			= 0,
	LTTNG_EVENT_CONTEXT_PERF_COUNTER	= 1,	/* Backward compat. */
	LTTNG_EVENT_CONTEXT_PROCNAME		= 2,
	LTTNG_EVENT_CONTEXT_PRIO		= 3,
	LTTNG_EVENT_CONTEXT_NICE		= 4,
	LTTNG_EVENT_CONTEXT_VPID		= 5,
	LTTNG_EVENT_CONTEXT_TID			= 6,
	LTTNG_EVENT_CONTEXT_VTID		= 7,
	LTTNG_EVENT_CONTEXT_PPID		= 8,
	LTTNG_EVENT_CONTEXT_VPPID		= 9,
	LTTNG_EVENT_CONTEXT_PTHREAD_ID		= 10,
	LTTNG_EVENT_CONTEXT_HOSTNAME		= 11,
	LTTNG_EVENT_CONTEXT_IP			= 12,
	LTTNG_EVENT_CONTEXT_PERF_CPU_COUNTER	= 13,
	LTTNG_EVENT_CONTEXT_PERF_THREAD_COUNTER = 14,
	LTTNG_EVENT_CONTEXT_APP_CONTEXT		= 15,
	LTTNG_EVENT_CONTEXT_INTERRUPTIBLE	= 16,
	LTTNG_EVENT_CONTEXT_PREEMPTIBLE		= 17,
	LTTNG_EVENT_CONTEXT_NEED_RESCHEDULE	= 18,
	LTTNG_EVENT_CONTEXT_MIGRATABLE		= 19,
	LTTNG_EVENT_CONTEXT_CALLSTACK_KERNEL	= 20,
	LTTNG_EVENT_CONTEXT_CALLSTACK_USER	= 21, /* Supported on x86_32 and x86_64 only. */
	LTTNG_EVENT_CONTEXT_CGROUP_NS		= 22,
	LTTNG_EVENT_CONTEXT_IPC_NS		= 23,
	LTTNG_EVENT_CONTEXT_MNT_NS		= 24,
	LTTNG_EVENT_CONTEXT_NET_NS		= 25,
	LTTNG_EVENT_CONTEXT_PID_NS		= 26,
	LTTNG_EVENT_CONTEXT_USER_NS		= 27,
	LTTNG_EVENT_CONTEXT_UTS_NS		= 28,
	LTTNG_EVENT_CONTEXT_UID			= 29,
	LTTNG_EVENT_CONTEXT_EUID		= 30,
	LTTNG_EVENT_CONTEXT_SUID		= 31,
	LTTNG_EVENT_CONTEXT_GID			= 32,
	LTTNG_EVENT_CONTEXT_EGID		= 33,
	LTTNG_EVENT_CONTEXT_SGID		= 34,
	LTTNG_EVENT_CONTEXT_VUID		= 35,
	LTTNG_EVENT_CONTEXT_VEUID		= 36,
	LTTNG_EVENT_CONTEXT_VSUID		= 37,
	LTTNG_EVENT_CONTEXT_VGID		= 38,
	LTTNG_EVENT_CONTEXT_VEGID		= 39,
	LTTNG_EVENT_CONTEXT_VSGID		= 40,
	LTTNG_EVENT_CONTEXT_TIME_NS		= 41,
};

enum lttng_event_field_type {
	LTTNG_EVENT_FIELD_OTHER               = 0,
	LTTNG_EVENT_FIELD_INTEGER             = 1,
	LTTNG_EVENT_FIELD_ENUM                = 2,
	LTTNG_EVENT_FIELD_FLOAT               = 3,
	LTTNG_EVENT_FIELD_STRING              = 4,
};

enum lttng_event_flag {
	LTTNG_EVENT_FLAG_SYSCALL_32           = (1U << 0),
	LTTNG_EVENT_FLAG_SYSCALL_64           = (1U << 1),
};

/*
 * Perf counter attributes
 *
 * The structures should be initialized to zero before use.
 */
#define LTTNG_PERF_EVENT_PADDING1          16
struct lttng_event_perf_counter_ctx {
	uint32_t type;
	uint64_t config;
	char name[LTTNG_SYMBOL_NAME_LEN];

	char padding[LTTNG_PERF_EVENT_PADDING1];
};

/*
 * Event/channel context
 *
 * The structures should be initialized to zero before use.
 */
#define LTTNG_EVENT_CONTEXT_PADDING1       16
#define LTTNG_EVENT_CONTEXT_PADDING2       LTTNG_SYMBOL_NAME_LEN + 32
struct lttng_event_context {
	enum lttng_event_context_type ctx;
	char padding[LTTNG_EVENT_CONTEXT_PADDING1];

	union {
		struct lttng_event_perf_counter_ctx perf_counter;
		struct {
			char *provider_name;
			char *ctx_name;
		} app_ctx;
		char padding[LTTNG_EVENT_CONTEXT_PADDING2];
	} u;
};

/*
 * Event probe.
 *
 * Either addr is used or symbol_name and offset.
 *
 * The structures should be initialized to zero before use.
 */
#define LTTNG_EVENT_PROBE_PADDING1         16
struct lttng_event_probe_attr {
	uint64_t addr;

	uint64_t offset;
	char symbol_name[LTTNG_SYMBOL_NAME_LEN];

	char padding[LTTNG_EVENT_PROBE_PADDING1];
};

/*
 * Function tracer
 *
 * The structures should be initialized to zero before use.
 */
#define LTTNG_EVENT_FUNCTION_PADDING1      16
struct lttng_event_function_attr {
	char symbol_name[LTTNG_SYMBOL_NAME_LEN];

	char padding[LTTNG_EVENT_FUNCTION_PADDING1];
};

/*
 * Generic lttng event
 *
 * The structures should be initialized to zero before use.
 */
#define LTTNG_EVENT_PADDING1               12
#define LTTNG_EVENT_PADDING2               LTTNG_SYMBOL_NAME_LEN + 32
struct lttng_event {
	/* Offset 0 */
	enum lttng_event_type type;

	/* Offset 4 */
	char name[LTTNG_SYMBOL_NAME_LEN];

	/* Offset 260 */
	enum lttng_loglevel_type loglevel_type;

	/* Offset 264 */
	int loglevel;

	/* Offset 268 */
	int32_t enabled;	/* Does not apply: -1 */

	/* Offset 272 */
	pid_t pid;

	/* Offset 276 */
	unsigned char filter;	/* filter enabled ? */

	/* Offset 277 */
	unsigned char exclusion; /* exclusions added ? */

	/* Offset 278 */
	char padding2[2];

	/* Offset 280 */
	/* Event flag, from 2.6 and above. */
	enum lttng_event_flag flags;

	/* Offset 284 */
	char padding[4];

	/* Offset 288 */
	union {
		uint64_t padding;
		void *ptr;
	} extended;

	/* Offset 296 */
	/* Per event type configuration */
	union {
		struct lttng_event_probe_attr probe;
		struct lttng_event_function_attr ftrace;

		char padding[LTTNG_EVENT_PADDING2];
	} attr;
};

#define LTTNG_EVENT_FIELD_PADDING	LTTNG_SYMBOL_NAME_LEN + 32
struct lttng_event_field {
	char field_name[LTTNG_SYMBOL_NAME_LEN];
	enum lttng_event_field_type type;
	char padding[LTTNG_EVENT_FIELD_PADDING];
	struct lttng_event event;
	int nowrite;
};

/*
 * List the event(s) of a session channel.
 *
 * Both handle and channel_name CAN NOT be NULL.
 *
 * Return the size (number of entries) of the "lttng_event" array. Caller must
 * free events. On error a negative LTTng error code is returned.
 */
extern int lttng_list_events(struct lttng_handle *handle,
		const char *channel_name, struct lttng_event **events);

/*
 * Create an lttng_event.
 *
 * This creation function, introduced in LTTng 2.11, works around
 * the fact that the layout of the 'lttng_event' is publicly exposed.
 *
 * It allocates a larger object which exposes the same public fields
 * as a 'struct lttng_event', but also allows the use of the following extended
 * attribute setters:
 *   - lttng_event_set_userspace_probe_location();
 *
 * Events created through this function must be destroyed using
 * lttng_event_destroy().
 *
 * Returns a zeroed lttng_event on success, NULL on error.
 */
extern struct lttng_event *lttng_event_create(void);

/*
 * Destroy an lttng_event.
 *
 * This destruction function, introduced in LTTng 2.11, should only
 * be used with events created by lttng_event_create().
  */
extern void lttng_event_destroy(struct lttng_event *event);

/*
 * Get the filter expression of a specific LTTng event.
 *
 * If the call is successful, then the filter expression's address is put
 * in *filter_expression. If the event has no filter expression,
 * *filter_expression is set to NULL. The caller does NOT own
 * *filter_expression.
 *
 * Returns 0 on success, or a negative LTTng error code on error.
 */
extern int lttng_event_get_filter_expression(struct lttng_event *event,
		const char **filter_string);

/*
 * Get the number of exclusion names of a specific LTTng event.
 *
 * Returns the number of exclusion names on success, or a negative
 * LTTng error code on error.
 */
extern int lttng_event_get_exclusion_name_count(struct lttng_event *event);

/*
 * Get an LTTng event's exclusion name at a given index.
 *
 * If the call is successful, then the exclusion name string's address
 * is put in *exclusion_name. The caller does NOT own *exclusion_name.
 *
 * Returns 0 on success, or a negative LTTng error code on error.
 */
extern int lttng_event_get_exclusion_name(struct lttng_event *event,
		size_t index, const char **exclusion_name);

/*
 * Get the userspace probe location of a specific LTTng event.
 * If the call is successful, then a pointer to the probe location is returned.
 * If the event has no probe location a NULL pointer is returned. The caller
 * does not own the returned probe location.
 */
extern const struct lttng_userspace_probe_location *
lttng_event_get_userspace_probe_location(const struct lttng_event *event);

/*
 * Set an LTTng event's userspace probe location.
 *
 * If the call is successful, then the probe location is set to the event. The
 * ownership of the probe_location is given to the event.
 *
 * Note that the event must have been created using 'lttng_event_create()' in
 * order for this call to succeed.
 *
 * Returns 0 on success, or a negative LTTng error code on error.
 */
extern int lttng_event_set_userspace_probe_location(struct lttng_event *event,
		struct lttng_userspace_probe_location *probe_location);

/*
 * List the available tracepoints of a specific lttng domain.
 *
 * The handle CAN NOT be NULL.
 *
 * Return the size (number of entries) of the "lttng_event" array.  Caller must
 * free events. On error a negative LTTng error code is returned.
 */
extern int lttng_list_tracepoints(struct lttng_handle *handle,
		struct lttng_event **events);

/*
 * List the available tracepoints fields of a specific lttng domain.
 *
 * The handle CAN NOT be NULL.
 *
 * Return the size (number of entries) of the "lttng_event_field" array.
 * Caller must free fields. On error a negative LTTng error code is
 * returned.
 */
extern int lttng_list_tracepoint_fields(struct lttng_handle *handle,
		struct lttng_event_field **fields);

/*
 * List the available kernel syscall.
 *
 * Return the size (number of entries) of the allocated "lttng_event" array.
 * All events in will be of type syscall. Caller must free events. On error a
 * negative LTTng error code is returned.
 */
extern int lttng_list_syscalls(struct lttng_event **events);

/*
 * Add context to event(s) for a specific channel (or for all).
 *
 * If the channel_name is NULL and they are no channel for the domain, the
 * default channel is created (channel0). The context is then added on ALL
 * channels since no name was specified.
 *
 * The event_name is ignored since adding a context to an event is not possible
 * for now.
 *
 * Return 0 on success else a negative LTTng error code.
 */
extern int lttng_add_context(struct lttng_handle *handle,
		struct lttng_event_context *ctx, const char *event_name,
		const char *channel_name);

/*
 * Create or enable an event (or events) for a channel.
 *
 * If the event you are trying to enable does not exist, it will be created,
 * else it is enabled. If channel_name is NULL, the default channel is used
 * (channel0).
 *
 * The handle and ev params can not be NULL.
 *
 * Return 0 on success else a negative LTTng error code.
 */
extern int lttng_enable_event(struct lttng_handle *handle,
		struct lttng_event *ev, const char *channel_name);

/*
 * Create or enable an event with a specific filter.
 *
 * If the event you are trying to enable does not exist, it will be created,
 * else it is enabled.
 * If ev is NULL, all events are enabled with that filter.
 * If channel_name is NULL, the default channel is used (channel0) and created
 * if not found.
 * If filter_expression is NULL, an event without associated filter is
 * created.
 *
 * Return 0 on success else a negative LTTng error code.
 */
extern int lttng_enable_event_with_filter(struct lttng_handle *handle,
		struct lttng_event *event, const char *channel_name,
		const char *filter_expression);

/*
 * Create or enable an event with a filter and/or exclusions.
 *
 * If the event you are trying to enable does not exist, it will be created,
 * else it is enabled.
 * If ev is NULL, all events are enabled with the filter and exclusion options.
 * If channel_name is NULL, the default channel is used (channel0) and created
 * if not found.
 * If filter_expression is NULL, an event without associated filter is
 * created.
 * If exclusion count is zero, the event will be created without exclusions.
 *
 * Return 0 on success else a negative LTTng error code.
 */
extern int lttng_enable_event_with_exclusions(struct lttng_handle *handle,
		struct lttng_event *event, const char *channel_name,
		const char *filter_expression,
		int exclusion_count, char **exclusion_names);

/*
 * Disable event(s) of a channel and domain.
 *
 * If name is NULL, all events are disabled.
 * If channel_name is NULL, the default channel is used (channel0).
 *
 * Return 0 on success else a negative LTTng error code.
 */
extern int lttng_disable_event(struct lttng_handle *handle,
		const char *name, const char *channel_name);

/*
 * Disable event(s) of a channel and domain.
 *
 * Takes a struct lttng_event as parameter.
 * If channel_name is NULL, the default channel is used (channel0).
 *
 * Currently, @filter_expression must be NULL. (disabling specific
 * filter expressions not implemented)
 * Currently, only LTTNG_EVENT_ALL and LTTNG_EVENT_SYSCALL event types
 * are implemented for field @ev.
 *
 * Return 0 on success else a negative LTTng error code.
 */
int lttng_disable_event_ext(struct lttng_handle *handle,
		struct lttng_event *ev, const char *channel_name,
		const char *filter_expression);

#ifdef __cplusplus
}
#endif

#endif /* LTTNG_EVENT_H */
Commit	Line	Data
1239a312	1	/*
ab5be9fa MJ	2	* Copyright (C) 2014 David Goulet <dgoulet@efficios.com>
ab5be9fa MJ	3	* Copyright (C) 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com>
1239a312	4	*
ab5be9fa	5	* SPDX-License-Identifier: LGPL-2.1-only
1239a312	6	*
1239a312 DG	7	*/
	8
	9	#ifndef LTTNG_EVENT_H
	10	#define LTTNG_EVENT_H
	11
	12	#ifdef __cplusplus
	13	extern "C" {
	14	#endif
	15
	16	#include <lttng/handle.h>
ef0e06bc	17	#include <lttng/userspace-probe.h>
1239a312 DG	18
	19	/*
	20	* Instrumentation type of tracing event.
	21	*/
	22	enum lttng_event_type {
	23	LTTNG_EVENT_ALL = -1,
	24	LTTNG_EVENT_TRACEPOINT = 0,
	25	LTTNG_EVENT_PROBE = 1,
	26	LTTNG_EVENT_FUNCTION = 2,
	27	LTTNG_EVENT_FUNCTION_ENTRY = 3,
	28	LTTNG_EVENT_NOOP = 4,
	29	LTTNG_EVENT_SYSCALL = 5,
410b78a0	30	LTTNG_EVENT_USERSPACE_PROBE = 6,
1239a312 DG	31	};
	32
	33	/*
	34	* Loglevel information.
	35	*/
	36	enum lttng_loglevel_type {
	37	LTTNG_EVENT_LOGLEVEL_ALL = 0,
	38	LTTNG_EVENT_LOGLEVEL_RANGE = 1,
	39	LTTNG_EVENT_LOGLEVEL_SINGLE = 2,
	40	};
	41
	42	/*
	43	* Available loglevels.
	44	*/
	45	enum lttng_loglevel {
	46	LTTNG_LOGLEVEL_EMERG = 0,
	47	LTTNG_LOGLEVEL_ALERT = 1,
	48	LTTNG_LOGLEVEL_CRIT = 2,
	49	LTTNG_LOGLEVEL_ERR = 3,
	50	LTTNG_LOGLEVEL_WARNING = 4,
	51	LTTNG_LOGLEVEL_NOTICE = 5,
	52	LTTNG_LOGLEVEL_INFO = 6,
	53	LTTNG_LOGLEVEL_DEBUG_SYSTEM = 7,
	54	LTTNG_LOGLEVEL_DEBUG_PROGRAM = 8,
	55	LTTNG_LOGLEVEL_DEBUG_PROCESS = 9,
	56	LTTNG_LOGLEVEL_DEBUG_MODULE = 10,
	57	LTTNG_LOGLEVEL_DEBUG_UNIT = 11,
	58	LTTNG_LOGLEVEL_DEBUG_FUNCTION = 12,
	59	LTTNG_LOGLEVEL_DEBUG_LINE = 13,
	60	LTTNG_LOGLEVEL_DEBUG = 14,
	61	};
	62
	63	/*
	64	* Available loglevels for the JUL domain. Those are an exact map from the
	65	* class java.util.logging.Level.
	66	*/
	67	enum lttng_loglevel_jul {
	68	LTTNG_LOGLEVEL_JUL_OFF = INT32_MAX,
	69	LTTNG_LOGLEVEL_JUL_SEVERE = 1000,
	70	LTTNG_LOGLEVEL_JUL_WARNING = 900,
	71	LTTNG_LOGLEVEL_JUL_INFO = 800,
	72	LTTNG_LOGLEVEL_JUL_CONFIG = 700,
	73	LTTNG_LOGLEVEL_JUL_FINE = 500,
	74	LTTNG_LOGLEVEL_JUL_FINER = 400,
	75	LTTNG_LOGLEVEL_JUL_FINEST = 300,
	76	LTTNG_LOGLEVEL_JUL_ALL = INT32_MIN,
	77	};
	78
5cdb6027 DG	79	/*
	80	* Available loglevels for the LOG4j domain. Those are an exact map from the
	81	* class org.apache.log4j.Level.
	82	*/
	83	enum lttng_loglevel_log4j {
	84	LTTNG_LOGLEVEL_LOG4J_OFF = INT32_MAX,
	85	LTTNG_LOGLEVEL_LOG4J_FATAL = 50000,
	86	LTTNG_LOGLEVEL_LOG4J_ERROR = 40000,
	87	LTTNG_LOGLEVEL_LOG4J_WARN = 30000,
	88	LTTNG_LOGLEVEL_LOG4J_INFO = 20000,
	89	LTTNG_LOGLEVEL_LOG4J_DEBUG = 10000,
	90	LTTNG_LOGLEVEL_LOG4J_TRACE = 5000,
	91	LTTNG_LOGLEVEL_LOG4J_ALL = INT32_MIN,
	92	};
	93
0e115563 DG	94	/*
	95	* Available loglevels for the Python domain. Those are an exact map from the
	96	* Level class.
	97	*/
	98	enum lttng_loglevel_python {
	99	LTTNG_LOGLEVEL_PYTHON_CRITICAL = 50,
	100	LTTNG_LOGLEVEL_PYTHON_ERROR = 40,
	101	LTTNG_LOGLEVEL_PYTHON_WARNING = 30,
	102	LTTNG_LOGLEVEL_PYTHON_INFO = 20,
	103	LTTNG_LOGLEVEL_PYTHON_DEBUG = 10,
	104	LTTNG_LOGLEVEL_PYTHON_NOTSET = 0,
	105	};
	106
1239a312 DG	107	/*
	108	* LTTng consumer mode
	109	*/
	110	enum lttng_event_output {
	111	LTTNG_EVENT_SPLICE = 0,
	112	LTTNG_EVENT_MMAP = 1,
	113	};
	114
	115	/* Event context possible type */
	116	enum lttng_event_context_type {
2001793c JG	117	LTTNG_EVENT_CONTEXT_PID = 0,
	118	LTTNG_EVENT_CONTEXT_PERF_COUNTER = 1, /* Backward compat. */
	119	LTTNG_EVENT_CONTEXT_PROCNAME = 2,
	120	LTTNG_EVENT_CONTEXT_PRIO = 3,
	121	LTTNG_EVENT_CONTEXT_NICE = 4,
	122	LTTNG_EVENT_CONTEXT_VPID = 5,
	123	LTTNG_EVENT_CONTEXT_TID = 6,
	124	LTTNG_EVENT_CONTEXT_VTID = 7,
	125	LTTNG_EVENT_CONTEXT_PPID = 8,
	126	LTTNG_EVENT_CONTEXT_VPPID = 9,
	127	LTTNG_EVENT_CONTEXT_PTHREAD_ID = 10,
	128	LTTNG_EVENT_CONTEXT_HOSTNAME = 11,
	129	LTTNG_EVENT_CONTEXT_IP = 12,
	130	LTTNG_EVENT_CONTEXT_PERF_CPU_COUNTER = 13,
1239a312	131	LTTNG_EVENT_CONTEXT_PERF_THREAD_COUNTER = 14,
2001793c	132	LTTNG_EVENT_CONTEXT_APP_CONTEXT = 15,
1ae5e83e JD	133	LTTNG_EVENT_CONTEXT_INTERRUPTIBLE = 16,
	134	LTTNG_EVENT_CONTEXT_PREEMPTIBLE = 17,
	135	LTTNG_EVENT_CONTEXT_NEED_RESCHEDULE = 18,
	136	LTTNG_EVENT_CONTEXT_MIGRATABLE = 19,
373148e9 FG	137	LTTNG_EVENT_CONTEXT_CALLSTACK_KERNEL = 20,
373148e9 FG	138	LTTNG_EVENT_CONTEXT_CALLSTACK_USER = 21, /* Supported on x86_32 and x86_64 only. */
40e14884 MJ	139	LTTNG_EVENT_CONTEXT_CGROUP_NS = 22,
	140	LTTNG_EVENT_CONTEXT_IPC_NS = 23,
	141	LTTNG_EVENT_CONTEXT_MNT_NS = 24,
	142	LTTNG_EVENT_CONTEXT_NET_NS = 25,
	143	LTTNG_EVENT_CONTEXT_PID_NS = 26,
	144	LTTNG_EVENT_CONTEXT_USER_NS = 27,
	145	LTTNG_EVENT_CONTEXT_UTS_NS = 28,
499cbfa1 MJ	146	LTTNG_EVENT_CONTEXT_UID = 29,
	147	LTTNG_EVENT_CONTEXT_EUID = 30,
	148	LTTNG_EVENT_CONTEXT_SUID = 31,
	149	LTTNG_EVENT_CONTEXT_GID = 32,
	150	LTTNG_EVENT_CONTEXT_EGID = 33,
	151	LTTNG_EVENT_CONTEXT_SGID = 34,
	152	LTTNG_EVENT_CONTEXT_VUID = 35,
	153	LTTNG_EVENT_CONTEXT_VEUID = 36,
	154	LTTNG_EVENT_CONTEXT_VSUID = 37,
	155	LTTNG_EVENT_CONTEXT_VGID = 38,
	156	LTTNG_EVENT_CONTEXT_VEGID = 39,
	157	LTTNG_EVENT_CONTEXT_VSGID = 40,
d37ac3cd	158	LTTNG_EVENT_CONTEXT_TIME_NS = 41,
1239a312 DG	159	};
	160
	161	enum lttng_event_field_type {
	162	LTTNG_EVENT_FIELD_OTHER = 0,
	163	LTTNG_EVENT_FIELD_INTEGER = 1,
	164	LTTNG_EVENT_FIELD_ENUM = 2,
	165	LTTNG_EVENT_FIELD_FLOAT = 3,
	166	LTTNG_EVENT_FIELD_STRING = 4,
	167	};
	168
834978fd DG	169	enum lttng_event_flag {
	170	LTTNG_EVENT_FLAG_SYSCALL_32 = (1U << 0),
	171	LTTNG_EVENT_FLAG_SYSCALL_64 = (1U << 1),
	172	};
	173
1239a312 DG	174	/*
	175	* Perf counter attributes
	176	*
	177	* The structures should be initialized to zero before use.
	178	*/
	179	#define LTTNG_PERF_EVENT_PADDING1 16
	180	struct lttng_event_perf_counter_ctx {
	181	uint32_t type;
	182	uint64_t config;
	183	char name[LTTNG_SYMBOL_NAME_LEN];
	184
	185	char padding[LTTNG_PERF_EVENT_PADDING1];
	186	};
	187
	188	/*
	189	* Event/channel context
	190	*
	191	* The structures should be initialized to zero before use.
	192	*/
	193	#define LTTNG_EVENT_CONTEXT_PADDING1 16
	194	#define LTTNG_EVENT_CONTEXT_PADDING2 LTTNG_SYMBOL_NAME_LEN + 32
	195	struct lttng_event_context {
	196	enum lttng_event_context_type ctx;
	197	char padding[LTTNG_EVENT_CONTEXT_PADDING1];
	198
	199	union {
	200	struct lttng_event_perf_counter_ctx perf_counter;
2001793c JG	201	struct {
	202	char *provider_name;
	203	char *ctx_name;
	204	} app_ctx;
1239a312 DG	205	char padding[LTTNG_EVENT_CONTEXT_PADDING2];
	206	} u;
	207	};
	208
	209	/*
	210	* Event probe.
	211	*
	212	* Either addr is used or symbol_name and offset.
	213	*
	214	* The structures should be initialized to zero before use.
	215	*/
	216	#define LTTNG_EVENT_PROBE_PADDING1 16
	217	struct lttng_event_probe_attr {
	218	uint64_t addr;
	219
	220	uint64_t offset;
	221	char symbol_name[LTTNG_SYMBOL_NAME_LEN];
	222
	223	char padding[LTTNG_EVENT_PROBE_PADDING1];
	224	};
	225
	226	/*
	227	* Function tracer
	228	*
	229	* The structures should be initialized to zero before use.
	230	*/
	231	#define LTTNG_EVENT_FUNCTION_PADDING1 16
	232	struct lttng_event_function_attr {
	233	char symbol_name[LTTNG_SYMBOL_NAME_LEN];
	234
	235	char padding[LTTNG_EVENT_FUNCTION_PADDING1];
	236	};
	237
	238	/*
	239	* Generic lttng event
	240	*
	241	* The structures should be initialized to zero before use.
	242	*/
fe9ecacb	243	#define LTTNG_EVENT_PADDING1 12
1239a312 DG	244	#define LTTNG_EVENT_PADDING2 LTTNG_SYMBOL_NAME_LEN + 32
1239a312 DG	245	struct lttng_event {
fe9ecacb	246	/* Offset 0 */
1239a312	247	enum lttng_event_type type;
fe9ecacb PP	248
fe9ecacb PP	249	/* Offset 4 */
1239a312 DG	250	char name[LTTNG_SYMBOL_NAME_LEN];
1239a312 DG	251
fe9ecacb	252	/* Offset 260 */
1239a312	253	enum lttng_loglevel_type loglevel_type;
fe9ecacb PP	254
fe9ecacb PP	255	/* Offset 264 */
1239a312 DG	256	int loglevel;
1239a312 DG	257
fe9ecacb	258	/* Offset 268 */
1239a312	259	int32_t enabled; /* Does not apply: -1 */
fe9ecacb PP	260
fe9ecacb PP	261	/* Offset 272 */
1239a312	262	pid_t pid;
fe9ecacb PP	263
fe9ecacb PP	264	/* Offset 276 */
1239a312	265	unsigned char filter; /* filter enabled ? */
fe9ecacb PP	266
fe9ecacb PP	267	/* Offset 277 */
1239a312 DG	268	unsigned char exclusion; /* exclusions added ? */
1239a312 DG	269
fe9ecacb PP	270	/* Offset 278 */
	271	char padding2[2];
	272
	273	/* Offset 280 */
834978fd DG	274	/* Event flag, from 2.6 and above. */
	275	enum lttng_event_flag flags;
	276
fe9ecacb	277	/* Offset 284 */
b4e3ceb9 PP	278	char padding[4];
	279
	280	/* Offset 288 */
	281	union {
4829ae55	282	uint64_t padding;
b4e3ceb9 PP	283	void *ptr;
b4e3ceb9 PP	284	} extended;
1239a312	285
fe9ecacb	286	/* Offset 296 */
1239a312 DG	287	/* Per event type configuration */
	288	union {
	289	struct lttng_event_probe_attr probe;
	290	struct lttng_event_function_attr ftrace;
	291
	292	char padding[LTTNG_EVENT_PADDING2];
	293	} attr;
	294	};
	295
	296	#define LTTNG_EVENT_FIELD_PADDING LTTNG_SYMBOL_NAME_LEN + 32
	297	struct lttng_event_field {
	298	char field_name[LTTNG_SYMBOL_NAME_LEN];
	299	enum lttng_event_field_type type;
	300	char padding[LTTNG_EVENT_FIELD_PADDING];
	301	struct lttng_event event;
	302	int nowrite;
	303	};
	304
	305	/*
	306	* List the event(s) of a session channel.
	307	*
	308	* Both handle and channel_name CAN NOT be NULL.
	309	*
	310	* Return the size (number of entries) of the "lttng_event" array. Caller must
	311	* free events. On error a negative LTTng error code is returned.
	312	*/
	313	extern int lttng_list_events(struct lttng_handle *handle,
	314	const char channel_name, struct lttng_event *events);
	315
c8282375 JG	316	/*
	317	* Create an lttng_event.
	318	*
	319	* This creation function, introduced in LTTng 2.11, works around
	320	* the fact that the layout of the 'lttng_event' is publicly exposed.
	321	*
	322	* It allocates a larger object which exposes the same public fields
	323	* as a 'struct lttng_event', but also allows the use of the following extended
	324	* attribute setters:
	325	* - lttng_event_set_userspace_probe_location();
	326	*
	327	* Events created through this function must be destroyed using
	328	* lttng_event_destroy().
	329	*
	330	* Returns a zeroed lttng_event on success, NULL on error.
	331	*/
ef0e06bc JG	332	extern struct lttng_event *lttng_event_create(void);
ef0e06bc JG	333
c8282375 JG	334	/*
	335	* Destroy an lttng_event.
	336	*
	337	* This destruction function, introduced in LTTng 2.11, should only
	338	* be used with events created by lttng_event_create().
	339	*/
ef0e06bc JG	340	extern void lttng_event_destroy(struct lttng_event *event);
ef0e06bc JG	341
d31d3e8c	342	/*
134e72ed	343	* Get the filter expression of a specific LTTng event.
d31d3e8c	344	*
134e72ed JG	345	* If the call is successful, then the filter expression's address is put
	346	* in *filter_expression. If the event has no filter expression,
	347	* *filter_expression is set to NULL. The caller does NOT own
	348	* *filter_expression.
d31d3e8c PP	349	*
	350	* Returns 0 on success, or a negative LTTng error code on error.
	351	*/
134e72ed	352	extern int lttng_event_get_filter_expression(struct lttng_event *event,
d31d3e8c PP	353	const char **filter_string);
d31d3e8c PP	354
f086e50e PP	355	/*
	356	* Get the number of exclusion names of a specific LTTng event.
	357	*
	358	* Returns the number of exclusion names on success, or a negative
	359	* LTTng error code on error.
	360	*/
	361	extern int lttng_event_get_exclusion_name_count(struct lttng_event *event);
	362
	363	/*
	364	* Get an LTTng event's exclusion name at a given index.
	365	*
	366	* If the call is successful, then the exclusion name string's address
	367	* is put in exclusion_name. The caller does NOT own exclusion_name.
	368	*
	369	* Returns 0 on success, or a negative LTTng error code on error.
	370	*/
	371	extern int lttng_event_get_exclusion_name(struct lttng_event *event,
	372	size_t index, const char **exclusion_name);
	373
ef0e06bc JG	374	/*
	375	* Get the userspace probe location of a specific LTTng event.
	376	* If the call is successful, then a pointer to the probe location is returned.
	377	* If the event has no probe location a NULL pointer is returned. The caller
	378	* does not own the returned probe location.
	379	*/
87597c2c JG	380	extern const struct lttng_userspace_probe_location *
87597c2c JG	381	lttng_event_get_userspace_probe_location(const struct lttng_event *event);
ef0e06bc JG	382
	383	/*
	384	* Set an LTTng event's userspace probe location.
c8282375	385	*
ef0e06bc JG	386	* If the call is successful, then the probe location is set to the event. The
	387	* ownership of the probe_location is given to the event.
	388	*
c8282375 JG	389	* Note that the event must have been created using 'lttng_event_create()' in
	390	* order for this call to succeed.
	391	*
ef0e06bc JG	392	* Returns 0 on success, or a negative LTTng error code on error.
	393	*/
	394	extern int lttng_event_set_userspace_probe_location(struct lttng_event *event,
	395	struct lttng_userspace_probe_location *probe_location);
	396
1239a312 DG	397	/*
	398	* List the available tracepoints of a specific lttng domain.
	399	*
	400	* The handle CAN NOT be NULL.
	401	*
	402	* Return the size (number of entries) of the "lttng_event" array. Caller must
	403	* free events. On error a negative LTTng error code is returned.
	404	*/
	405	extern int lttng_list_tracepoints(struct lttng_handle *handle,
	406	struct lttng_event **events);
	407
	408	/*
	409	* List the available tracepoints fields of a specific lttng domain.
	410	*
	411	* The handle CAN NOT be NULL.
	412	*
	413	* Return the size (number of entries) of the "lttng_event_field" array.
	414	* Caller must free fields. On error a negative LTTng error code is
	415	* returned.
	416	*/
	417	extern int lttng_list_tracepoint_fields(struct lttng_handle *handle,
	418	struct lttng_event_field **fields);
	419
834978fd DG	420	/*
	421	* List the available kernel syscall.
	422	*
	423	* Return the size (number of entries) of the allocated "lttng_event" array.
	424	* All events in will be of type syscall. Caller must free events. On error a
	425	* negative LTTng error code is returned.
	426	*/
	427	extern int lttng_list_syscalls(struct lttng_event **events);
	428
1239a312 DG	429	/*
	430	* Add context to event(s) for a specific channel (or for all).
	431	*
	432	* If the channel_name is NULL and they are no channel for the domain, the
	433	* default channel is created (channel0). The context is then added on ALL
	434	* channels since no name was specified.
	435	*
	436	* The event_name is ignored since adding a context to an event is not possible
	437	* for now.
	438	*
	439	* Return 0 on success else a negative LTTng error code.
	440	*/
	441	extern int lttng_add_context(struct lttng_handle *handle,
	442	struct lttng_event_context ctx, const char event_name,
	443	const char *channel_name);
	444
	445	/*
	446	* Create or enable an event (or events) for a channel.
	447	*
	448	* If the event you are trying to enable does not exist, it will be created,
	449	* else it is enabled. If channel_name is NULL, the default channel is used
	450	* (channel0).
	451	*
	452	* The handle and ev params can not be NULL.
	453	*
	454	* Return 0 on success else a negative LTTng error code.
	455	*/
	456	extern int lttng_enable_event(struct lttng_handle *handle,
	457	struct lttng_event ev, const char channel_name);
	458
	459	/*
	460	* Create or enable an event with a specific filter.
	461	*
	462	* If the event you are trying to enable does not exist, it will be created,
	463	* else it is enabled.
	464	* If ev is NULL, all events are enabled with that filter.
	465	* If channel_name is NULL, the default channel is used (channel0) and created
	466	* if not found.
	467	* If filter_expression is NULL, an event without associated filter is
	468	* created.
	469	*
	470	* Return 0 on success else a negative LTTng error code.
	471	*/
	472	extern int lttng_enable_event_with_filter(struct lttng_handle *handle,
	473	struct lttng_event event, const char channel_name,
	474	const char *filter_expression);
	475
	476	/*
	477	* Create or enable an event with a filter and/or exclusions.
	478	*
	479	* If the event you are trying to enable does not exist, it will be created,
	480	* else it is enabled.
	481	* If ev is NULL, all events are enabled with the filter and exclusion options.
	482	* If channel_name is NULL, the default channel is used (channel0) and created
	483	* if not found.
	484	* If filter_expression is NULL, an event without associated filter is
	485	* created.
	486	* If exclusion count is zero, the event will be created without exclusions.
	487	*
	488	* Return 0 on success else a negative LTTng error code.
	489	*/
	490	extern int lttng_enable_event_with_exclusions(struct lttng_handle *handle,
	491	struct lttng_event event, const char channel_name,
	492	const char *filter_expression,
493	int exclusion_count, char **exclusion_names);
494
495	/*
496	* Disable event(s) of a channel and domain.
497	*
498	* If name is NULL, all events are disabled.
499	* If channel_name is NULL, the default channel is used (channel0).
500	*
501	* Return 0 on success else a negative LTTng error code.
502	*/
503	extern int lttng_disable_event(struct lttng_handle *handle,
504	const char name, const char channel_name);
505
6e911cad MD	506	/*
	507	* Disable event(s) of a channel and domain.
	508	*
	509	* Takes a struct lttng_event as parameter.
	510	* If channel_name is NULL, the default channel is used (channel0).
	511	*
	512	* Currently, @filter_expression must be NULL. (disabling specific
	513	* filter expressions not implemented)
	514	* Currently, only LTTNG_EVENT_ALL and LTTNG_EVENT_SYSCALL event types
	515	* are implemented for field @ev.
	516	*
	517	* Return 0 on success else a negative LTTng error code.
	518	*/
	519	int lttng_disable_event_ext(struct lttng_handle *handle,
	520	struct lttng_event ev, const char channel_name,
	521	const char *filter_expression);
	522
1239a312 DG	523	#ifdef __cplusplus
	524	}
	525	#endif
	526
	527	#endif /* LTTNG_EVENT_H */