+++ /dev/null
-/*
- * Copyright (C) 2011 EfficiOS Inc.
- * Copyright (C) 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com>
- *
- * SPDX-License-Identifier: GPL-2.0-only
- *
- */
-
-#ifndef _LTT_TRACE_UST_H
-#define _LTT_TRACE_UST_H
-
-#include <limits.h>
-#include <urcu/list.h>
-
-#include <common/defaults.h>
-#include <common/hashtable/hashtable.h>
-#include <common/tracker.h>
-#include <lttng/lttng.h>
-
-#include "consumer.h"
-#include "lttng-ust-ctl.h"
-
-struct agent;
-
-struct ltt_ust_ht_key {
- const char *name;
- const struct lttng_bytecode *filter;
- enum lttng_ust_abi_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_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_abi_event attr;
- struct lttng_ht_node_str node;
- char *filter_expression;
- struct lttng_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_ABI_SYM_NAME_LEN];
- struct lttng_ust_abi_channel_attr attr;
- struct lttng_ht *ctx;
- struct cds_list_head ctx_list;
- struct lttng_ht *events;
- struct lttng_ht_node_str node;
- 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;
-};
-
-struct ust_id_tracker_node {
- struct lttng_ht_node_ulong node;
-};
-
-struct ust_id_tracker {
- struct lttng_ht *ht;
-};
-
-/* UST session */
-struct ltt_ust_session {
- uint64_t id; /* Unique identifier of session */
- struct ltt_ust_domain_global domain_global;
- /* 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;
- /* Is the session active meaning has is been started or stopped. */
- unsigned int active:1;
- struct consumer_output *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_abi_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 process_attr_tracker *tracker_vpid;
- struct process_attr_tracker *tracker_vuid;
- struct process_attr_tracker *tracker_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(struct lttng_ht *ht,
- char *name, struct lttng_bytecode *filter,
- enum lttng_ust_abi_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,
- 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(uint64_t session_id);
-struct ltt_ust_channel *trace_ust_create_channel(struct lttng_channel *attr,
- enum lttng_domain_type domain);
-
-enum lttng_error_code trace_ust_create_event(struct lttng_event *ev,
- char *filter_expression,
- struct lttng_bytecode *filter,
- struct lttng_event_exclusion *exclusion,
- bool internal_event, struct ltt_ust_event **ust_event);
-struct ltt_ust_context *trace_ust_create_context(
- 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_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_id_tracker_lookup(enum lttng_process_attr process_attr,
- struct ltt_ust_session *session,
- int id);
-enum lttng_error_code trace_ust_process_attr_tracker_set_tracking_policy(
- struct ltt_ust_session *session,
- enum lttng_process_attr process_attr,
- enum lttng_tracking_policy policy);
-enum lttng_error_code trace_ust_process_attr_tracker_inclusion_set_add_value(
- struct ltt_ust_session *session,
- enum lttng_process_attr process_attr,
- const struct process_attr_value *value);
-enum lttng_error_code trace_ust_process_attr_tracker_inclusion_set_remove_value(
- struct ltt_ust_session *session,
- enum lttng_process_attr process_attr,
- const struct process_attr_value *value);
-const struct process_attr_tracker *trace_ust_get_process_attr_tracker(
- struct ltt_ust_session *session,
- enum lttng_process_attr process_attr);
-
-#else /* HAVE_LIBLTTNG_UST_CTL */
-
-static inline int trace_ust_ht_match_event(
- struct cds_lfht_node *node __attribute__((unused)),
- const void *_key __attribute__((unused)))
-{
- return 0;
-}
-
-static inline int trace_ust_ht_match_event_by_name(
- struct cds_lfht_node *node __attribute__((unused)),
- const void *_key __attribute__((unused)))
-{
- return 0;
-}
-
-static inline
-struct ltt_ust_channel *trace_ust_find_channel_by_name(
- struct lttng_ht *ht __attribute__((unused)),
- const char *name __attribute__((unused)))
-{
- return NULL;
-}
-
-static inline
-struct ltt_ust_session *trace_ust_create_session(
- unsigned int session_id __attribute__((unused)))
-{
- return NULL;
-}
-
-static inline
-struct ltt_ust_channel *trace_ust_create_channel(
- struct lttng_channel *attr __attribute__((unused)),
- enum lttng_domain_type domain __attribute__((unused)))
-{
- return NULL;
-}
-
-static inline
-enum lttng_error_code trace_ust_create_event(
- struct lttng_event *ev __attribute__((unused)),
- const char *filter_expression __attribute__((unused)),
- struct lttng_bytecode *filter __attribute__((unused)),
- struct lttng_event_exclusion *exclusion __attribute__((unused)),
- bool internal_event __attribute__((unused)),
- struct ltt_ust_event **ust_event __attribute__((unused)))
-{
- return LTTNG_ERR_NO_UST;
-}
-
-static inline
-void trace_ust_destroy_session(
- struct ltt_ust_session *session __attribute__((unused)))
-{
-}
-
-static inline
-void trace_ust_destroy_channel(
- struct ltt_ust_channel *channel __attribute__((unused)))
-{
-}
-
-static inline
-void trace_ust_destroy_event(
- struct ltt_ust_event *event __attribute__((unused)))
-{
-}
-
-static inline
-void trace_ust_free_session(
- struct ltt_ust_session *session __attribute__((unused)))
-{
-}
-
-static inline
-struct ltt_ust_context *trace_ust_create_context(
- const struct lttng_event_context *ctx __attribute__((unused)))
-{
- return NULL;
-}
-
-static inline
-int trace_ust_match_context(
- const struct ltt_ust_context *uctx __attribute__((unused)),
- const struct lttng_event_context *ctx __attribute__((unused)))
-{
- return 0;
-}
-
-static inline
-struct ltt_ust_event *trace_ust_find_event(
- struct lttng_ht *ht __attribute__((unused)),
- char *name __attribute__((unused)),
- struct lttng_bytecode *filter __attribute__((unused)),
- enum lttng_ust_abi_loglevel_type loglevel_type __attribute__((unused)),
- int loglevel_value __attribute__((unused)),
- struct lttng_event_exclusion *exclusion __attribute__((unused)))
-{
- return NULL;
-}
-
-static inline
-void trace_ust_delete_channel(
- struct lttng_ht *ht __attribute__((unused)),
- struct ltt_ust_channel *channel __attribute__((unused)))
-{
- return;
-}
-
-static inline
-struct agent *trace_ust_find_agent(
- struct ltt_ust_session *session __attribute__((unused)),
- enum lttng_domain_type domain_type __attribute__((unused)))
-{
- return NULL;
-}
-
-static inline int trace_ust_id_tracker_lookup(
- enum lttng_process_attr process_attr __attribute__((unused)),
- struct ltt_ust_session *session __attribute__((unused)),
- int id __attribute__((unused)))
-{
- return 0;
-}
-
-static inline enum lttng_error_code
-trace_ust_process_attr_tracker_set_tracking_policy(
- struct ltt_ust_session *session __attribute__((unused)),
- enum lttng_process_attr process_attr __attribute__((unused)),
- enum lttng_tracking_policy policy __attribute__((unused)))
-{
- return LTTNG_OK;
-}
-
-static inline enum lttng_error_code
-trace_ust_process_attr_tracker_inclusion_set_add_value(
- struct ltt_ust_session *session __attribute__((unused)),
- enum lttng_process_attr process_attr __attribute__((unused)),
- const struct process_attr_value *value __attribute__((unused)))
-{
- return LTTNG_OK;
-}
-
-static inline enum lttng_error_code
-trace_ust_process_attr_tracker_inclusion_set_remove_value(
- struct ltt_ust_session *session __attribute__((unused)),
- enum lttng_process_attr process_attr __attribute__((unused)),
- const struct process_attr_value *value __attribute__((unused)))
-{
- return LTTNG_OK;
-}
-
-static inline const struct process_attr_tracker *
-trace_ust_get_process_attr_tracker(
- struct ltt_ust_session *session __attribute__((unused)),
- enum lttng_process_attr process_attr __attribute__((unused)))
-{
- return NULL;
-}
-
-#endif /* HAVE_LIBLTTNG_UST_CTL */
-
-#endif /* _LTT_TRACE_UST_H */
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