X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fbin%2Flttng-sessiond%2Ftrace-ust.h;h=216bccb80f6bc75f28e88e4891d092d0621d47ed;hp=b0a65cf191c5b9624d24e354b98d900c373ef7fe;hb=4e6581a7740c292be662d108a21a80e478b42a71;hpb=f3f0db50cf3fbc658bb4ffaf79a7fb694ab05e1d diff --git a/src/bin/lttng-sessiond/trace-ust.h b/src/bin/lttng-sessiond/trace-ust.h index b0a65cf19..216bccb80 100644 --- a/src/bin/lttng-sessiond/trace-ust.h +++ b/src/bin/lttng-sessiond/trace-ust.h @@ -1,5 +1,6 @@ /* * Copyright (C) 2011 - David Goulet + * Copyright (C) 2016 - Jérémie Galarneau * * 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, @@ -18,7 +19,6 @@ #ifndef _LTT_TRACE_UST_H #define _LTT_TRACE_UST_H -#include #include #include @@ -27,203 +27,338 @@ #include #include "consumer.h" -#include "ust-ctl.h" +#include "lttng-ust-ctl.h" -/* UST Stream list */ -struct ltt_ust_stream_list { - unsigned int count; - struct cds_list_head head; +struct agent; + +struct ltt_ust_ht_key { + const char *name; + const struct lttng_filter_bytecode *filter; + enum lttng_ust_loglevel_type loglevel_type; + int loglevel_value; + const struct lttng_event_exclusion *exclusion; }; /* Context hash table nodes */ struct ltt_ust_context { - struct lttng_ust_context ctx; + struct lttng_ust_context_attr ctx; struct lttng_ht_node_ulong node; + struct cds_list_head list; }; /* UST event */ struct ltt_ust_event { unsigned int enabled; struct lttng_ust_event attr; - struct lttng_ht *ctx; struct lttng_ht_node_str node; - struct lttng_ust_filter_bytecode *filter; -}; - -/* UST stream */ -struct ltt_ust_stream { - int handle; - char pathname[PATH_MAX]; - /* Format is %s_%d respectively channel name and CPU number. */ - char name[DEFAULT_STREAM_NAME_LEN]; - struct lttng_ust_object_data *obj; - /* Using a list of streams to keep order. */ - struct cds_list_head list; + char *filter_expression; + struct lttng_filter_bytecode *filter; + struct lttng_event_exclusion *exclusion; + /* + * An internal event is an event which was created by the session daemon + * through which, for example, events emitted in Agent domains are + * "funelled". This is used to hide internal events from external + * clients as they should never be modified by the external world. + */ + bool internal; }; /* UST channel */ struct ltt_ust_channel { + uint64_t id; /* unique id per session. */ unsigned int enabled; + /* + * A UST channel can be part of a userspace sub-domain such as JUL, + * Log4j, Python. + */ + enum lttng_domain_type domain; char name[LTTNG_UST_SYM_NAME_LEN]; - char pathname[PATH_MAX]; - struct lttng_ust_channel attr; + struct lttng_ust_channel_attr attr; struct lttng_ht *ctx; + struct cds_list_head ctx_list; struct lttng_ht *events; struct lttng_ht_node_str node; -}; - -/* UST Metadata */ -struct ltt_ust_metadata { - int handle; - struct lttng_ust_object_data *obj; - char pathname[PATH_MAX]; /* Trace file path name */ - struct lttng_ust_channel attr; - struct lttng_ust_object_data *stream_obj; + uint64_t tracefile_size; + uint64_t tracefile_count; + uint64_t per_pid_closed_app_discarded; + uint64_t per_pid_closed_app_lost; + uint64_t monitor_timer_interval; }; /* UST domain global (LTTNG_DOMAIN_UST) */ struct ltt_ust_domain_global { struct lttng_ht *channels; + struct cds_list_head registry_buffer_uid_list; }; -/* UST domain pid (LTTNG_DOMAIN_UST_PID) */ -struct ltt_ust_domain_pid { - pid_t pid; - struct lttng_ht *channels; +struct ust_id_tracker_node { struct lttng_ht_node_ulong node; }; -/* UST domain exec name (LTTNG_DOMAIN_UST_EXEC_NAME) */ -struct ltt_ust_domain_exec { - char exec_name[LTTNG_UST_SYM_NAME_LEN]; - struct lttng_ht *channels; - struct lttng_ht_node_str node; +struct ust_id_tracker { + struct lttng_ht *ht; }; /* UST session */ struct ltt_ust_session { - int id; /* Unique identifier of session */ - int start_trace; - char pathname[PATH_MAX]; + uint64_t id; /* Unique identifier of session */ struct ltt_ust_domain_global domain_global; - /* - * Those two hash tables contains data for a specific UST domain and each - * contains a HT of channels. See ltt_ust_domain_exec and - * ltt_ust_domain_pid data structures. - */ - struct lttng_ht *domain_pid; - struct lttng_ht *domain_exec; + /* Hash table of agent indexed by agent domain. */ + struct lttng_ht *agents; /* UID/GID of the user owning the session */ uid_t uid; gid_t gid; - /* - * Two consumer_output object are needed where one is for the current - * output object and the second one is the temporary object used to store - * URI being set by the lttng_set_consumer_uri call. Once - * lttng_enable_consumer is called, the two pointers are swapped. - */ + /* Is the session active meaning has is been started or stopped. */ + unsigned int active:1; struct consumer_output *consumer; - struct consumer_output *tmp_consumer; /* Sequence number for filters so the tracer knows the ordering. */ uint64_t filter_seq_num; + /* This indicates which type of buffer this session is set for. */ + enum lttng_buffer_type buffer_type; + /* If set to 1, the buffer_type can not be changed anymore. */ + int buffer_type_changed; + /* For per UID buffer, every buffer reg object is kept of this session */ + struct cds_list_head buffer_reg_uid_list; + /* Next channel ID available for a newly registered channel. */ + uint64_t next_channel_id; + /* Once this value reaches UINT32_MAX, no more id can be allocated. */ + uint64_t used_channel_id; + /* Tell or not if the session has to output the traces. */ + unsigned int output_traces; + unsigned int snapshot_mode; + unsigned int has_non_default_channel; + unsigned int live_timer_interval; /* usec */ + + /* Metadata channel attributes. */ + struct lttng_ust_channel_attr metadata_attr; + + /* + * Path where to keep the shared memory files. + */ + char root_shm_path[PATH_MAX]; + char shm_path[PATH_MAX]; + + /* Current trace chunk of the ltt_session. */ + struct lttng_trace_chunk *current_trace_chunk; + + /* Trackers used for actual lookup on app registration. */ + struct ust_id_tracker vpid_tracker; + struct ust_id_tracker vuid_tracker; + struct ust_id_tracker vgid_tracker; + + /* Tracker list of keys requested by users. */ + struct lttng_tracker_list *tracker_list_vpid; + struct lttng_tracker_list *tracker_list_vuid; + struct lttng_tracker_list *tracker_list_vgid; }; +/* + * Validate that the id has reached the maximum allowed or not. + * + * Return 0 if NOT else 1. + */ +static inline int trace_ust_is_max_id(uint64_t id) +{ + return (id == UINT64_MAX) ? 1 : 0; +} + +/* + * Return next available channel id and increment the used counter. The + * trace_ust_is_max_id function MUST be called before in order to validate if + * the maximum number of IDs have been reached. If not, it is safe to call this + * function. + * + * Return a unique channel ID. If max is reached, the used_channel_id counter + * is returned. + */ +static inline uint64_t trace_ust_get_next_chan_id(struct ltt_ust_session *s) +{ + if (trace_ust_is_max_id(s->used_channel_id)) { + return s->used_channel_id; + } + + s->used_channel_id++; + return s->next_channel_id++; +} + #ifdef HAVE_LIBLTTNG_UST_CTL +int trace_ust_ht_match_event(struct cds_lfht_node *node, const void *_key); +int trace_ust_ht_match_event_by_name(struct cds_lfht_node *node, + const void *_key); + /* * Lookup functions. NULL is returned if not found. */ -struct ltt_ust_event *trace_ust_find_event_by_name(struct lttng_ht *ht, - char *name); +struct ltt_ust_event *trace_ust_find_event(struct lttng_ht *ht, + char *name, struct lttng_filter_bytecode *filter, + enum lttng_ust_loglevel_type loglevel_type, int loglevel_value, + struct lttng_event_exclusion *exclusion); struct ltt_ust_channel *trace_ust_find_channel_by_name(struct lttng_ht *ht, - char *name); + const char *name); +struct agent *trace_ust_find_agent(struct ltt_ust_session *session, + enum lttng_domain_type domain_type); /* * Create functions malloc() the data structure. */ -struct ltt_ust_session *trace_ust_create_session(char *path, - unsigned int session_id, struct lttng_domain *domain); +struct ltt_ust_session *trace_ust_create_session(uint64_t session_id); struct ltt_ust_channel *trace_ust_create_channel(struct lttng_channel *attr, - char *path); -struct ltt_ust_event *trace_ust_create_event(struct lttng_event *ev); -struct ltt_ust_metadata *trace_ust_create_metadata(char *path); + enum lttng_domain_type domain); +enum lttng_error_code trace_ust_create_event(struct lttng_event *ev, + char *filter_expression, + struct lttng_filter_bytecode *filter, + struct lttng_event_exclusion *exclusion, + bool internal_event, struct ltt_ust_event **ust_event); struct ltt_ust_context *trace_ust_create_context( - struct lttng_event_context *ctx); + const struct lttng_event_context *ctx); +int trace_ust_match_context(const struct ltt_ust_context *uctx, + const struct lttng_event_context *ctx); +void trace_ust_delete_channel(struct lttng_ht *ht, + struct ltt_ust_channel *channel); /* * Destroy functions free() the data structure and remove from linked list if * it's applies. */ void trace_ust_destroy_session(struct ltt_ust_session *session); -void trace_ust_destroy_metadata(struct ltt_ust_metadata *metadata); void trace_ust_destroy_channel(struct ltt_ust_channel *channel); void trace_ust_destroy_event(struct ltt_ust_event *event); +void trace_ust_destroy_context(struct ltt_ust_context *ctx); +void trace_ust_free_session(struct ltt_ust_session *session); + +int trace_ust_track_id(enum lttng_tracker_type tracker_type, + struct ltt_ust_session *session, + const struct lttng_tracker_id *id); +int trace_ust_untrack_id(enum lttng_tracker_type tracker_type, + struct ltt_ust_session *session, + const struct lttng_tracker_id *id); + +int trace_ust_id_tracker_lookup(enum lttng_tracker_type tracker_type, + struct ltt_ust_session *session, + int id); + +int trace_ust_list_tracker_ids(enum lttng_tracker_type tracker_type, + struct ltt_ust_session *session, + struct lttng_tracker_ids **_ids); #else /* HAVE_LIBLTTNG_UST_CTL */ -static inline -struct ltt_ust_event *trace_ust_find_event_by_name(struct lttng_ht *ht, - char *name) +static inline int trace_ust_ht_match_event(struct cds_lfht_node *node, + const void *_key) { - return NULL; + return 0; +} +static inline int trace_ust_ht_match_event_by_name(struct cds_lfht_node *node, + const void *_key) +{ + return 0; } - static inline struct ltt_ust_channel *trace_ust_find_channel_by_name(struct lttng_ht *ht, - char *name) + const char *name) { return NULL; } static inline -struct ltt_ust_session *trace_ust_create_session(char *path, pid_t pid, - struct lttng_domain *domain) +struct ltt_ust_session *trace_ust_create_session(unsigned int session_id) { return NULL; } static inline struct ltt_ust_channel *trace_ust_create_channel(struct lttng_channel *attr, - char *path) + enum lttng_domain_type domain) { return NULL; } static inline -struct ltt_ust_event *trace_ust_create_event(struct lttng_event *ev) +enum lttng_error_code trace_ust_create_event(struct lttng_event *ev, + const char *filter_expression, + struct lttng_filter_bytecode *filter, + struct lttng_event_exclusion *exclusion, + bool internal_event, struct ltt_ust_event **ust_event) { - return NULL; + return LTTNG_ERR_NO_UST; } static inline -struct ltt_ust_metadata *trace_ust_create_metadata(char *path) +void trace_ust_destroy_session(struct ltt_ust_session *session) { - return NULL; } static inline -void trace_ust_destroy_session(struct ltt_ust_session *session) +void trace_ust_destroy_channel(struct ltt_ust_channel *channel) { } static inline -void trace_ust_destroy_metadata(struct ltt_ust_metadata *metadata) +void trace_ust_destroy_event(struct ltt_ust_event *event) { } static inline -void trace_ust_destroy_channel(struct ltt_ust_channel *channel) +void trace_ust_free_session(struct ltt_ust_session *session) { } static inline -void trace_ust_destroy_event(struct ltt_ust_event *event) +struct ltt_ust_context *trace_ust_create_context( + const struct lttng_event_context *ctx) { + return NULL; } static inline -struct ltt_ust_context *trace_ust_create_context( - struct lttng_event_context *ctx) +int trace_ust_match_context(const struct ltt_ust_context *uctx, + const struct lttng_event_context *ctx) +{ + return 0; +} +static inline +struct ltt_ust_event *trace_ust_find_event(struct lttng_ht *ht, + char *name, struct lttng_filter_bytecode *filter, + enum lttng_ust_loglevel_type loglevel_type, int loglevel_value, + struct lttng_event_exclusion *exclusion) { return NULL; } - +static inline +void trace_ust_delete_channel(struct lttng_ht *ht, + struct ltt_ust_channel *channel) +{ + return; +} +static inline +struct agent *trace_ust_find_agent(struct ltt_ust_session *session, + enum lttng_domain_type domain_type) +{ + return NULL; +} +static inline int trace_ust_track_id(enum lttng_tracker_type tracker_type, + struct ltt_ust_session *session, + const struct lttng_tracker_id *id) +{ + return 0; +} +static inline int trace_ust_untrack_id(enum lttng_tracker_type tracker_type, + struct ltt_ust_session *session, + const struct lttng_tracker_id *id) +{ + return 0; +} +static inline int trace_ust_id_tracker_lookup( + enum lttng_tracker_type tracker_type, + struct ltt_ust_session *session, + int pid) +{ + return 0; +} +static inline int trace_ust_list_tracker_ids( + enum lttng_tracker_type tracker_type, + struct ltt_ust_session *session, + struct lttng_tracker_ids **_ids) +{ + return -1; +} #endif /* HAVE_LIBLTTNG_UST_CTL */ #endif /* _LTT_TRACE_UST_H */