X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=include%2Flttng%2Flttng.h;h=5d3362040d2004c395cb708fd735b76e85ca0da2;hp=065caee9146a12d2bf9f63dfff3aa0511c611641;hb=73db5be497c9307137534926f99df5ddc5e1865e;hpb=46839cc293bbeddbc1a47dbc898ee8f9e2a52a1a diff --git a/include/lttng/lttng.h b/include/lttng/lttng.h index 065caee91..5d3362040 100644 --- a/include/lttng/lttng.h +++ b/include/lttng/lttng.h @@ -6,8 +6,8 @@ * Copyright (C) 2011 - David Goulet * * This library is free software; you can redistribute it and/or modify it - * under the terms of the GNU Lesser General Public License as published by the - * Free Software Foundation; only version 2.1 of the License. + * under the terms of the GNU Lesser General Public License, version 2.1 only, + * as published by the Free Software Foundation. * * This library is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or @@ -19,8 +19,8 @@ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ -#ifndef _LTTNG_H -#define _LTTNG_H +#ifndef LTTNG_H +#define LTTNG_H #include #include @@ -80,21 +80,21 @@ enum lttng_loglevel_type { * 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, + 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, }; /* @@ -124,6 +124,19 @@ enum lttng_calibrate_type { LTTNG_CALIBRATE_FUNCTION = 0, }; +/* Health component for the health check function. */ +enum lttng_health_component { + LTTNG_HEALTH_CMD, + LTTNG_HEALTH_APP_MANAGE, + LTTNG_HEALTH_APP_REG, + LTTNG_HEALTH_KERNEL, + LTTNG_HEALTH_CONSUMER, + LTTNG_HEALTH_ALL, +}; + +/* + * The structures should be initialized to zero before use. + */ #define LTTNG_DOMAIN_PADDING1 16 #define LTTNG_DOMAIN_PADDING2 LTTNG_SYMBOL_NAME_LEN + 32 struct lttng_domain { @@ -137,7 +150,11 @@ struct lttng_domain { } attr; }; -/* Perf counter attributes */ +/* + * 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; @@ -147,7 +164,11 @@ struct lttng_event_perf_counter_ctx { char padding[LTTNG_PERF_EVENT_PADDING1]; }; -/* Event/Channel context */ +/* + * 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 { @@ -164,6 +185,8 @@ struct lttng_event_context { * 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 { @@ -177,6 +200,8 @@ struct lttng_event_probe_attr { /* * Function tracer + * + * The structures should be initialized to zero before use. */ #define LTTNG_EVENT_FUNCTION_PADDING1 16 struct lttng_event_function_attr { @@ -187,8 +212,10 @@ struct lttng_event_function_attr { /* * Generic lttng event + * + * The structures should be initialized to zero before use. */ -#define LTTNG_EVENT_PADDING1 16 +#define LTTNG_EVENT_PADDING1 15 #define LTTNG_EVENT_PADDING2 LTTNG_SYMBOL_NAME_LEN + 32 struct lttng_event { enum lttng_event_type type; @@ -197,8 +224,9 @@ struct lttng_event { enum lttng_loglevel_type loglevel_type; int loglevel; - uint32_t enabled; + int32_t enabled; /* Does not apply: -1 */ pid_t pid; + unsigned char filter; /* filter enabled ? */ char padding[LTTNG_EVENT_PADDING1]; @@ -211,8 +239,26 @@ struct lttng_event { } attr; }; +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, +}; + +#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; +}; + /* * Tracer channel attributes. For both kernel and user-space. + * + * The structures should be initialized to zero before use. */ #define LTTNG_CHANNEL_ATTR_PADDING1 LTTNG_SYMBOL_NAME_LEN + 32 struct lttng_channel_attr { @@ -228,6 +274,8 @@ struct lttng_channel_attr { /* * Channel information structure. For both kernel and user-space. + * + * The structures should be initialized to zero before use. */ #define LTTNG_CHANNEL_PADDING1 16 struct lttng_channel { @@ -251,6 +299,8 @@ struct lttng_calibrate { * This is an 'output data' meaning that it only comes *from* the session * daemon *to* the lttng client. It's basically a 'human' representation of * tracing entities (here a session). + * + * The structures should be initialized to zero before use. */ #define LTTNG_SESSION_PADDING1 16 struct lttng_session { @@ -264,6 +314,8 @@ struct lttng_session { /* * Handle used as a context for commands. + * + * The structures should be initialized to zero before use. */ #define LTTNG_HANDLE_PADDING1 16 struct lttng_handle { @@ -305,10 +357,11 @@ extern struct lttng_handle *lttng_create_handle(const char *session_name, extern void lttng_destroy_handle(struct lttng_handle *handle); /* - * Create a tracing session using a name and a path where the trace will be - * written. + * Create a tracing session using a name and an optional URL. + * + * If _url_ is NULL, no consumer is created for the session. */ -extern int lttng_create_session(const char *name, const char *path); +extern int lttng_create_session(const char *name, const char *url); /* * Destroy a tracing session. @@ -362,6 +415,15 @@ extern int lttng_list_events(struct lttng_handle *handle, extern int lttng_list_tracepoints(struct lttng_handle *handle, struct lttng_event **events); +/* + * List the available tracepoints fields of a specific lttng domain. + * + * Return the size (number of entries) of the "lttng_event_field" array. + * Caller must free(3). + */ +extern int lttng_list_tracepoint_fields(struct lttng_handle *handle, + struct lttng_event_field **fields); + /* * Check if a session daemon is alive. * @@ -416,7 +478,7 @@ extern int lttng_add_context(struct lttng_handle *handle, const char *channel_name); /* - * Create or enable a kernel event (or events) for a channel. + * 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. @@ -427,14 +489,25 @@ extern int lttng_enable_event(struct lttng_handle *handle, struct lttng_event *ev, const char *channel_name); /* - * Create or enable a kernel channel. + * Apply a filter expression to an event. + * + * If event_name is NULL, the filter is applied to all events of the channel. + * If channel_name is NULL, a lookup of the event's channel is done. + * If both are NULL, the filter is applied to all events of all channels. + */ +extern int lttng_set_event_filter(struct lttng_handle *handle, + const char *event_name, + const char *channel_name, + const char *filter_expression); +/* + * Create or enable a channel. * The channel name cannot be NULL. */ extern int lttng_enable_channel(struct lttng_handle *handle, struct lttng_channel *chan); /* - * Disable kernel event(s) of a channel and domain. + * Disable event(s) of a channel and domain. * * If event_name is NULL, all events are disabled. * If channel_name is NULL, the default channel is used (channel0). @@ -443,7 +516,7 @@ extern int lttng_disable_event(struct lttng_handle *handle, const char *name, const char *channel_name); /* - * Disable kernel channel. + * Disable channel. * * The channel name cannot be NULL. */ @@ -465,4 +538,38 @@ extern int lttng_calibrate(struct lttng_handle *handle, extern void lttng_channel_set_default_attr(struct lttng_domain *domain, struct lttng_channel_attr *attr); -#endif /* _LTTNG_H */ +/* + * Set URL for a consumer for a session and domain. + * + * Both data and control URL must be defined. If both URLs are the same, only + * the control URL is used even for network streaming. + * + * Default port are 5342 and 5343 respectively for control and data which uses + * the TCP protocol. + */ +extern int lttng_set_consumer_url(struct lttng_handle *handle, + const char *control_url, const char *data_url); + +/* + * Enable the consumer for a session and domain. + */ +extern int lttng_enable_consumer(struct lttng_handle *handle); + +/* + * Disable consumer for a session and domain. + */ +extern int lttng_disable_consumer(struct lttng_handle *handle); + +/* + * Check session daemon health for a specific component. + * + * Return 0 if health is OK or 1 if BAD. A returned value of -1 indicate that + * the control library was not able to connect to the session daemon health + * socket. + * + * Any other positive value is an lttcomm error which can be translate with + * lttng_strerror(). + */ +extern int lttng_health_check(enum lttng_health_component c); + +#endif /* LTTNG_H */