+++ /dev/null
-/*
- * Copyright (C) 2011 David Goulet <david.goulet@polymtl.ca>
- * Copyright (C) 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com>
- *
- * SPDX-License-Identifier: GPL-2.0-only
- *
- */
-
-#define _LGPL_SOURCE
-#include <urcu/list.h>
-#include <string.h>
-
-#include <common/compat/errno.h>
-#include <lttng/lttng.h>
-#include <lttng/condition/condition.h>
-#include <lttng/condition/event-rule-matches.h>
-#include <lttng/event-rule/event-rule.h>
-#include <lttng/event-rule/event-rule-internal.h>
-#include <common/bytecode/bytecode.h>
-#include <common/error.h>
-#include <common/sessiond-comm/sessiond-comm.h>
-#include <common/filter.h>
-#include <common/context.h>
-
-#include "channel.h"
-#include "event.h"
-#include "kernel.h"
-#include "lttng-sessiond.h"
-#include "lttng-ust-ctl.h"
-#include "lttng-ust-error.h"
-#include "ust-app.h"
-#include "trace-kernel.h"
-#include "trace-ust.h"
-#include "agent.h"
-#include "utils.h"
-
-/*
- * Add unique UST event based on the event name, filter bytecode and loglevel.
- */
-static void add_unique_ust_event(struct lttng_ht *ht,
- struct ltt_ust_event *event)
-{
- struct cds_lfht_node *node_ptr;
- struct ltt_ust_ht_key key;
-
- LTTNG_ASSERT(ht);
- LTTNG_ASSERT(ht->ht);
- LTTNG_ASSERT(event);
-
- key.name = event->attr.name;
- key.filter = (struct lttng_bytecode *) event->filter;
- key.loglevel_type = event->attr.loglevel_type;
- key.loglevel_value = event->attr.loglevel;
- key.exclusion = event->exclusion;
-
- node_ptr = cds_lfht_add_unique(ht->ht,
- ht->hash_fct(event->node.key, lttng_ht_seed),
- trace_ust_ht_match_event, &key, &event->node.node);
- LTTNG_ASSERT(node_ptr == &event->node.node);
-}
-
-/*
- * Disable kernel tracepoint events for a channel from the kernel session of
- * a specified event_name and event type.
- * On type LTTNG_EVENT_ALL all events with event_name are disabled.
- * If event_name is NULL all events of the specified type are disabled.
- */
-int event_kernel_disable_event(struct ltt_kernel_channel *kchan,
- const char *event_name, enum lttng_event_type type)
-{
- int ret, error = 0, found = 0;
- struct ltt_kernel_event *kevent;
-
- LTTNG_ASSERT(kchan);
-
- /* For each event in the kernel session */
- cds_list_for_each_entry(kevent, &kchan->events_list.head, list) {
- if (type != LTTNG_EVENT_ALL && kevent->type != type)
- continue;
- if (event_name != NULL && strcmp(event_name, kevent->event->name)) {
- continue;
- }
- found++;
- ret = kernel_disable_event(kevent);
- if (ret < 0) {
- error = 1;
- continue;
- }
- }
- DBG("Disable kernel event: found %d events with name: %s and type: %d",
- found, event_name ? event_name : "NULL", type);
-
- if (event_name != NULL && !found) {
- ret = LTTNG_ERR_NO_EVENT;
- } else {
- ret = error ? LTTNG_ERR_KERN_DISABLE_FAIL : LTTNG_OK;
- }
-
- return ret;
-}
-
-/*
- * Enable kernel tracepoint event for a channel from the kernel session.
- * We own filter_expression and filter.
- */
-int event_kernel_enable_event(struct ltt_kernel_channel *kchan,
- struct lttng_event *event, char *filter_expression,
- struct lttng_bytecode *filter)
-{
- int ret;
- struct ltt_kernel_event *kevent;
-
- LTTNG_ASSERT(kchan);
- LTTNG_ASSERT(event);
-
- kevent = trace_kernel_find_event(event->name, kchan,
- event->type, filter);
- if (kevent == NULL) {
- ret = kernel_create_event(event, kchan, filter_expression, filter);
- /* We have passed ownership */
- filter_expression = NULL;
- filter = NULL;
- if (ret) {
- goto end;
- }
- } else if (kevent->enabled == 0) {
- ret = kernel_enable_event(kevent);
- if (ret < 0) {
- ret = LTTNG_ERR_KERN_ENABLE_FAIL;
- goto end;
- }
- } else {
- /* At this point, the event is considered enabled */
- ret = LTTNG_ERR_KERN_EVENT_EXIST;
- goto end;
- }
-
- ret = LTTNG_OK;
-end:
- free(filter_expression);
- free(filter);
- return ret;
-}
-
-/*
- * ============================
- * UST : The Ultimate Frontier!
- * ============================
- */
-
-/*
- * Enable UST tracepoint event for a channel from a UST session.
- * We own filter_expression, filter, and exclusion.
- */
-int event_ust_enable_tracepoint(struct ltt_ust_session *usess,
- struct ltt_ust_channel *uchan, struct lttng_event *event,
- char *filter_expression,
- struct lttng_bytecode *filter,
- struct lttng_event_exclusion *exclusion,
- bool internal_event)
-{
- int ret = LTTNG_OK, to_create = 0;
- struct ltt_ust_event *uevent;
-
- LTTNG_ASSERT(usess);
- LTTNG_ASSERT(uchan);
- LTTNG_ASSERT(event);
-
- rcu_read_lock();
-
- uevent = trace_ust_find_event(uchan->events, event->name, filter,
- (enum lttng_ust_abi_loglevel_type) event->loglevel_type,
- event->loglevel, exclusion);
- if (!uevent) {
- ret = trace_ust_create_event(event, filter_expression,
- filter, exclusion, internal_event, &uevent);
- /* We have passed ownership */
- filter_expression = NULL;
- filter = NULL;
- exclusion = NULL;
- if (ret != LTTNG_OK) {
- goto end;
- }
-
- /* Valid to set it after the goto error since uevent is still NULL */
- to_create = 1;
- }
-
- if (uevent->enabled) {
- /* It's already enabled so everything is OK */
- LTTNG_ASSERT(!to_create);
- ret = LTTNG_ERR_UST_EVENT_ENABLED;
- goto end;
- }
-
- uevent->enabled = 1;
- if (to_create) {
- /* Add ltt ust event to channel */
- add_unique_ust_event(uchan->events, uevent);
- }
-
- if (!usess->active) {
- goto end;
- }
-
- if (to_create) {
- /* Create event on all UST registered apps for session */
- ret = ust_app_create_event_glb(usess, uchan, uevent);
- } else {
- /* Enable event on all UST registered apps for session */
- ret = ust_app_enable_event_glb(usess, uchan, uevent);
- }
-
- if (ret < 0) {
- if (ret == -LTTNG_UST_ERR_EXIST) {
- ret = LTTNG_ERR_UST_EVENT_EXIST;
- } else {
- ret = LTTNG_ERR_UST_ENABLE_FAIL;
- }
- goto end;
- }
-
- DBG("Event UST %s %s in channel %s", uevent->attr.name,
- to_create ? "created" : "enabled", uchan->name);
-
- ret = LTTNG_OK;
-
-end:
- rcu_read_unlock();
- free(filter_expression);
- free(filter);
- free(exclusion);
- return ret;
-}
-
-/*
- * Disable UST tracepoint of a channel from a UST session.
- */
-int event_ust_disable_tracepoint(struct ltt_ust_session *usess,
- struct ltt_ust_channel *uchan, const char *event_name)
-{
- int ret;
- struct ltt_ust_event *uevent;
- struct lttng_ht_node_str *node;
- struct lttng_ht_iter iter;
- struct lttng_ht *ht;
-
- LTTNG_ASSERT(usess);
- LTTNG_ASSERT(uchan);
- LTTNG_ASSERT(event_name);
-
- ht = uchan->events;
-
- rcu_read_lock();
-
- /*
- * We use a custom lookup since we need the iterator for the next_duplicate
- * call in the do while loop below.
- */
- cds_lfht_lookup(ht->ht, ht->hash_fct((void *) event_name, lttng_ht_seed),
- trace_ust_ht_match_event_by_name, event_name, &iter.iter);
- node = lttng_ht_iter_get_node_str(&iter);
- if (node == NULL) {
- DBG2("Trace UST event NOT found by name %s", event_name);
- ret = LTTNG_ERR_UST_EVENT_NOT_FOUND;
- goto error;
- }
-
- do {
- uevent = caa_container_of(node, struct ltt_ust_event, node);
- LTTNG_ASSERT(uevent);
-
- if (uevent->enabled == 0) {
- /* It's already disabled so everything is OK */
- goto next;
- }
- uevent->enabled = 0;
- DBG2("Event UST %s disabled in channel %s", uevent->attr.name,
- uchan->name);
-
- if (!usess->active) {
- goto next;
- }
- ret = ust_app_disable_event_glb(usess, uchan, uevent);
- if (ret < 0 && ret != -LTTNG_UST_ERR_EXIST) {
- ret = LTTNG_ERR_UST_DISABLE_FAIL;
- goto error;
- }
-next:
- /* Get next duplicate event by name. */
- cds_lfht_next_duplicate(ht->ht, trace_ust_ht_match_event_by_name,
- event_name, &iter.iter);
- node = lttng_ht_iter_get_node_str(&iter);
- } while (node);
-
- ret = LTTNG_OK;
-
-error:
- rcu_read_unlock();
- return ret;
-}
-
-/*
- * Disable all UST tracepoints for a channel from a UST session.
- */
-int event_ust_disable_all_tracepoints(struct ltt_ust_session *usess,
- struct ltt_ust_channel *uchan)
-{
- int ret, i, size, error = 0;
- struct lttng_ht_iter iter;
- struct ltt_ust_event *uevent = NULL;
- struct lttng_event *events = NULL;
-
- LTTNG_ASSERT(usess);
- LTTNG_ASSERT(uchan);
-
- rcu_read_lock();
-
- /* Disabling existing events */
- cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent,
- node.node) {
- if (uevent->enabled == 1) {
- ret = event_ust_disable_tracepoint(usess, uchan,
- uevent->attr.name);
- if (ret < 0) {
- error = LTTNG_ERR_UST_DISABLE_FAIL;
- continue;
- }
- }
- }
-
- /* Get all UST available events */
- size = ust_app_list_events(&events);
- if (size < 0) {
- ret = LTTNG_ERR_UST_LIST_FAIL;
- goto error;
- }
-
- for (i = 0; i < size; i++) {
- ret = event_ust_disable_tracepoint(usess, uchan,
- events[i].name);
- if (ret < 0) {
- /* Continue to disable the rest... */
- error = LTTNG_ERR_UST_DISABLE_FAIL;
- continue;
- }
- }
-
- ret = error ? error : LTTNG_OK;
-error:
- rcu_read_unlock();
- free(events);
- return ret;
-}
-
-static void agent_enable_all(struct agent *agt)
-{
- struct agent_event *aevent;
- struct lttng_ht_iter iter;
-
- /* Flag every event as enabled. */
- rcu_read_lock();
- cds_lfht_for_each_entry (
- agt->events->ht, &iter.iter, aevent, node.node) {
- aevent->enabled_count++;
- }
- rcu_read_unlock();
-}
-
-/*
- * Enable all agent event for a given UST session.
- *
- * Return LTTNG_OK on success or else a LTTNG_ERR* code.
- */
-int event_agent_enable_all(struct ltt_ust_session *usess,
- struct agent *agt, struct lttng_event *event,
- struct lttng_bytecode *filter ,char *filter_expression)
-{
- int ret;
-
- LTTNG_ASSERT(usess);
-
- DBG("Event agent enabling ALL events for session %" PRIu64, usess->id);
-
- /* Enable event on agent application through TCP socket. */
- ret = event_agent_enable(usess, agt, event, filter, filter_expression);
- if (ret != LTTNG_OK) {
- goto error;
- }
-
- agent_enable_all(agt);
-
- ret = LTTNG_OK;
-
-error:
- return ret;
-}
-
-/*
- * Check if this event's filter requires the activation of application contexts
- * and enable them in the agent.
- * TODO: bytecode iterator does not support non-legacy application
- * contexts yet. Not an issue for now, since they are not generated by
- * the lttng-ctl library.
- */
-static int add_filter_app_ctx(struct lttng_bytecode *bytecode,
- const char *filter_expression, struct agent *agt)
-{
- int ret = LTTNG_OK;
- char *provider_name = NULL, *ctx_name = NULL;
- struct bytecode_symbol_iterator *it =
- bytecode_symbol_iterator_create(bytecode);
-
- if (!it) {
- ret = LTTNG_ERR_NOMEM;
- goto end;
- }
-
- do {
- struct lttng_event_context ctx;
- const char *symbol_name =
- bytecode_symbol_iterator_get_name(it);
-
- if (parse_application_context(symbol_name, &provider_name,
- &ctx_name)) {
- /* Not an application context. */
- continue;
- }
-
- ctx.ctx = LTTNG_EVENT_CONTEXT_APP_CONTEXT;
- ctx.u.app_ctx.provider_name = provider_name;
- ctx.u.app_ctx.ctx_name = ctx_name;
-
- /* Recognized an application context. */
- DBG("Enabling event with filter expression \"%s\" requires enabling the %s:%s application context.",
- filter_expression, provider_name, ctx_name);
-
- ret = agent_add_context(&ctx, agt);
- if (ret != LTTNG_OK) {
- ERR("Failed to add application context %s:%s.",
- provider_name, ctx_name);
- goto end;
- }
-
- ret = agent_enable_context(&ctx, agt->domain);
- if (ret != LTTNG_OK) {
- ERR("Failed to enable application context %s:%s.",
- provider_name, ctx_name);
- goto end;
- }
-
- free(provider_name);
- free(ctx_name);
- provider_name = ctx_name = NULL;
- } while (bytecode_symbol_iterator_next(it) == 0);
-end:
- free(provider_name);
- free(ctx_name);
- bytecode_symbol_iterator_destroy(it);
- return ret;
-}
-
-static int agent_enable(struct agent *agt,
- struct lttng_event *event,
- struct lttng_bytecode *filter,
- char *filter_expression)
-{
- int ret, created = 0;
- struct agent_event *aevent;
-
- LTTNG_ASSERT(event);
- LTTNG_ASSERT(agt);
-
- aevent = agent_find_event(event->name, event->loglevel_type,
- event->loglevel, filter_expression, agt);
- if (!aevent) {
- aevent = agent_create_event(event->name, event->loglevel_type,
- event->loglevel, filter,
- filter_expression);
- if (!aevent) {
- ret = LTTNG_ERR_NOMEM;
- goto error;
- }
- filter = NULL;
- filter_expression = NULL;
- created = 1;
- LTTNG_ASSERT(!AGENT_EVENT_IS_ENABLED(aevent));
- }
-
- if (created && aevent->filter) {
- ret = add_filter_app_ctx(
- aevent->filter, aevent->filter_expression, agt);
- if (ret != LTTNG_OK) {
- goto error;
- }
- }
-
- /* Already enabled? */
- if (AGENT_EVENT_IS_ENABLED(aevent)) {
- ret = LTTNG_OK;
- goto end;
- }
-
- ret = agent_enable_event(aevent, agt->domain);
- if (ret != LTTNG_OK) {
- goto error;
- }
-
- /* If the event was created prior to the enable, add it to the domain. */
- if (created) {
- agent_add_event(aevent, agt);
- }
-
- ret = LTTNG_OK;
- goto end;
-
-error:
- if (created) {
- agent_destroy_event(aevent);
- }
-end:
- free(filter);
- free(filter_expression);
- return ret;
-}
-
-/*
- * Enable a single agent event for a given UST session.
- *
- * Return LTTNG_OK on success or else a LTTNG_ERR* code.
- */
-int event_agent_enable(struct ltt_ust_session *usess,
- struct agent *agt,
- struct lttng_event *event,
- struct lttng_bytecode *filter,
- char *filter_expression)
-{
- LTTNG_ASSERT(usess);
- LTTNG_ASSERT(event);
- LTTNG_ASSERT(agt);
-
- DBG("Enabling agent event: event pattern = '%s', session id = %" PRIu64 ", loglevel type = %d, loglevel = %d, filter expression = '%s'",
- event->name, usess->id, event->loglevel_type,
- event->loglevel,
- filter_expression ? filter_expression : "(none)");
-
- return agent_enable(agt, event, filter, filter_expression);
-}
-
-/*
- * Enable a single agent event for a trigger.
- *
- * Return LTTNG_OK on success or else a LTTNG_ERR* code.
- */
-int trigger_agent_enable(const struct lttng_trigger *trigger, struct agent *agt)
-{
- int ret;
- enum lttng_condition_status c_status;
- enum lttng_trigger_status t_status;
- enum lttng_domain_type d_type;
- const struct lttng_condition *condition;
- const struct lttng_event_rule *rule;
- const char *filter_expression;
- char *filter_expression_copy = NULL;
- const struct lttng_bytecode *filter_bytecode;
- struct lttng_bytecode *filter_bytecode_copy = NULL;
- struct lttng_event *event = NULL;
- uid_t trigger_owner_uid = 0;
- const char *trigger_name;
-
- LTTNG_ASSERT(trigger);
- LTTNG_ASSERT(agt);
-
- t_status = lttng_trigger_get_name(trigger, &trigger_name);
- if (t_status != LTTNG_TRIGGER_STATUS_OK) {
- trigger_name = "(anonymous)";
- }
-
- t_status = lttng_trigger_get_owner_uid(trigger, &trigger_owner_uid);
- LTTNG_ASSERT(t_status == LTTNG_TRIGGER_STATUS_OK);
-
- condition = lttng_trigger_get_const_condition(trigger);
-
- LTTNG_ASSERT(lttng_condition_get_type(condition) ==
- LTTNG_CONDITION_TYPE_EVENT_RULE_MATCHES);
-
- c_status = lttng_condition_event_rule_matches_get_rule(
- condition, &rule);
- LTTNG_ASSERT(c_status == LTTNG_CONDITION_STATUS_OK);
-
- switch (lttng_event_rule_get_type(rule)) {
- case LTTNG_EVENT_RULE_TYPE_JUL_LOGGING:
- case LTTNG_EVENT_RULE_TYPE_LOG4J_LOGGING:
- case LTTNG_EVENT_RULE_TYPE_PYTHON_LOGGING:
- break;
- default:
- abort();
- break;
- }
-
- d_type = lttng_event_rule_get_domain_type(rule);
- LTTNG_ASSERT(d_type == agt->domain);
-
- event = lttng_event_rule_generate_lttng_event(rule);
- if (!event) {
- ret = LTTNG_ERR_NOMEM;
- goto end;
- }
-
- /* Get the internal filter expression and bytecode. */
- filter_expression = lttng_event_rule_get_filter(rule);
- if (filter_expression) {
- filter_expression_copy = strdup(filter_expression);
- if (!filter_expression_copy) {
- ret = LTTNG_ERR_NOMEM;
- goto end;
- }
-
- /* Get the filter bytecode */
- filter_bytecode = lttng_event_rule_get_filter_bytecode(rule);
- if (filter_bytecode) {
- filter_bytecode_copy =
- lttng_bytecode_copy(filter_bytecode);
- if (!filter_bytecode_copy) {
- ret = LTTNG_ERR_NOMEM;
- goto end;
- }
- }
- }
-
- DBG("Enabling agent event from trigger: trigger name = '%s', trigger owner uid = %d, token = %" PRIu64,
- trigger_name, trigger_owner_uid,
- lttng_trigger_get_tracer_token(trigger));
-
- ret = agent_enable(agt, event, filter_bytecode_copy,
- filter_expression_copy);
- /* Ownership was passed even in case of error. */
- filter_expression_copy = NULL;
- filter_bytecode_copy = NULL;
-
-end:
- free(filter_expression_copy);
- free(filter_bytecode_copy);
- free(event);
- return ret;
-}
-
-/*
- * Return the default event name associated with the provided UST domain. Return
- * NULL on error.
- */
-const char *event_get_default_agent_ust_name(enum lttng_domain_type domain)
-{
- const char *default_event_name = NULL;
-
- switch (domain) {
- case LTTNG_DOMAIN_LOG4J:
- default_event_name = DEFAULT_LOG4J_EVENT_NAME;
- break;
- case LTTNG_DOMAIN_JUL:
- default_event_name = DEFAULT_JUL_EVENT_NAME;
- break;
- case LTTNG_DOMAIN_PYTHON:
- default_event_name = DEFAULT_PYTHON_EVENT_NAME;
- break;
- default:
- abort();
- }
-
- return default_event_name;
-}
-
-static int trigger_agent_disable_one(const struct lttng_trigger *trigger,
- struct agent *agt,
- struct agent_event *aevent)
-
-{
- int ret;
-
- LTTNG_ASSERT(agt);
- LTTNG_ASSERT(trigger);
- LTTNG_ASSERT(aevent);
-
- /*
- * Actual ust event un-registration happens on the trigger
- * un-registration at that point.
- */
-
- DBG("Event agent disabling %s (loglevel type %d, loglevel value %d) for trigger %" PRIu64,
- aevent->name, aevent->loglevel_type,
- aevent->loglevel_value, lttng_trigger_get_tracer_token(trigger));
-
- /* Already disabled? */
- if (!AGENT_EVENT_IS_ENABLED(aevent)) {
- goto end;
- }
-
- ret = agent_disable_event(aevent, agt->domain);
- if (ret != LTTNG_OK) {
- goto error;
- }
-
-end:
- return LTTNG_OK;
-
-error:
- return ret;
-}
-
-/*
- * Disable a given agent event for a given UST session.
- *
- * Must be called with the RCU read lock held.
- * Return LTTNG_OK on success or else a LTTNG_ERR* code.
- */
-static int event_agent_disable_one(struct ltt_ust_session *usess,
- struct agent *agt, struct agent_event *aevent)
-{
- int ret;
- struct ltt_ust_event *uevent = NULL;
- struct ltt_ust_channel *uchan = NULL;
- const char *ust_event_name, *ust_channel_name;
-
- LTTNG_ASSERT(agt);
- LTTNG_ASSERT(usess);
- LTTNG_ASSERT(aevent);
-
- DBG("Event agent disabling %s (loglevel type %d, loglevel value %d) for session %" PRIu64,
- aevent->name, aevent->loglevel_type, aevent->loglevel_value,
- usess->id);
-
- /* Already disabled? */
- if (!AGENT_EVENT_IS_ENABLED(aevent)) {
- goto end;
- }
-
- if (agt->domain == LTTNG_DOMAIN_JUL) {
- ust_channel_name = DEFAULT_JUL_CHANNEL_NAME;
- } else if (agt->domain == LTTNG_DOMAIN_LOG4J) {
- ust_channel_name = DEFAULT_LOG4J_CHANNEL_NAME;
- } else if (agt->domain == LTTNG_DOMAIN_PYTHON) {
- ust_channel_name = DEFAULT_PYTHON_CHANNEL_NAME;
- } else {
- ret = LTTNG_ERR_INVALID;
- goto error;
- }
-
- /*
- * Disable it on the UST side. First get the channel reference then find
- * the event and finally disable it.
- */
- uchan = trace_ust_find_channel_by_name(usess->domain_global.channels,
- (char *) ust_channel_name);
- if (!uchan) {
- ret = LTTNG_ERR_UST_CHAN_NOT_FOUND;
- goto error;
- }
-
- ust_event_name = event_get_default_agent_ust_name(agt->domain);
- if (!ust_event_name) {
- ret = LTTNG_ERR_FATAL;
- goto error;
- }
-
- /*
- * Agent UST event has its loglevel type forced to
- * LTTNG_UST_LOGLEVEL_ALL. The actual loglevel type/value filtering
- * happens thanks to an UST filter. The following -1 is actually
- * ignored since the type is LTTNG_UST_LOGLEVEL_ALL.
- */
- uevent = trace_ust_find_event(uchan->events, (char *) ust_event_name,
- aevent->filter, LTTNG_UST_ABI_LOGLEVEL_ALL, -1, NULL);
- /* If the agent event exists, it must be available on the UST side. */
- LTTNG_ASSERT(uevent);
-
- if (usess->active) {
- ret = ust_app_disable_event_glb(usess, uchan, uevent);
- if (ret < 0 && ret != -LTTNG_UST_ERR_EXIST) {
- ret = LTTNG_ERR_UST_DISABLE_FAIL;
- goto error;
- }
- }
-
- /*
- * Flag event that it's disabled so the shadow copy on the ust app side
- * will disable it if an application shows up.
- */
- uevent->enabled = 0;
-
- ret = agent_disable_event(aevent, agt->domain);
- if (ret != LTTNG_OK) {
- goto error;
- }
-
-end:
- return LTTNG_OK;
-
-error:
- return ret;
-}
-
-/*
- * Disable agent event matching a given trigger.
- *
- * Return LTTNG_OK on success or else a LTTNG_ERR* code.
- */
-int trigger_agent_disable(
- const struct lttng_trigger *trigger, struct agent *agt)
-{
- int ret = LTTNG_OK;
- struct agent_event *aevent;
-
- LTTNG_ASSERT(trigger);
- LTTNG_ASSERT(agt);
-
- DBG("Event agent disabling for trigger %" PRIu64,
- lttng_trigger_get_tracer_token(trigger));
-
- rcu_read_lock();
- aevent = agent_find_event_by_trigger(trigger, agt);
-
- if (aevent == NULL) {
- DBG2("Event agent NOT found by trigger %" PRIu64,
- lttng_trigger_get_tracer_token(trigger));
- ret = LTTNG_ERR_UST_EVENT_NOT_FOUND;
- goto end;
- }
-
- ret = trigger_agent_disable_one(trigger, agt, aevent);
-
- if (ret != LTTNG_OK) {
- goto end;
- }
-
-end:
- rcu_read_unlock();
- return ret;
-}
-
-/*
- * Disable all agent events matching a given name for a given UST session.
- *
- * Return LTTNG_OK on success or else a LTTNG_ERR* code.
- */
-int event_agent_disable(struct ltt_ust_session *usess, struct agent *agt,
- const char *event_name)
-{
- int ret = LTTNG_OK;
- struct agent_event *aevent;
- struct lttng_ht_iter iter;
- struct lttng_ht_node_str *node;
-
- LTTNG_ASSERT(agt);
- LTTNG_ASSERT(usess);
- LTTNG_ASSERT(event_name);
-
- DBG("Event agent disabling %s (all loglevels) for session %" PRIu64, event_name, usess->id);
-
- rcu_read_lock();
- agent_find_events_by_name(event_name, agt, &iter);
- node = lttng_ht_iter_get_node_str(&iter);
-
- if (node == NULL) {
- DBG2("Event agent NOT found by name %s", event_name);
- ret = LTTNG_ERR_UST_EVENT_NOT_FOUND;
- goto end;
- }
-
- do {
- aevent = caa_container_of(node, struct agent_event, node);
- ret = event_agent_disable_one(usess, agt, aevent);
-
- if (ret != LTTNG_OK) {
- goto end;
- }
-
- /* Get next duplicate agent event by name. */
- agent_event_next_duplicate(event_name, agt, &iter);
- node = lttng_ht_iter_get_node_str(&iter);
- } while (node);
-end:
- rcu_read_unlock();
- return ret;
-}
-/*
- * Disable all agent event for a given UST session.
- *
- * Return LTTNG_OK on success or else a LTTNG_ERR* code.
- */
-int event_agent_disable_all(struct ltt_ust_session *usess,
- struct agent *agt)
-{
- int ret;
- struct agent_event *aevent;
- struct lttng_ht_iter iter;
-
- LTTNG_ASSERT(agt);
- LTTNG_ASSERT(usess);
-
- /*
- * Disable event on agent application. Continue to disable all other events
- * if the * event is not found.
- */
- ret = event_agent_disable(usess, agt, "*");
- if (ret != LTTNG_OK && ret != LTTNG_ERR_UST_EVENT_NOT_FOUND) {
- goto error;
- }
-
- /* Disable every event. */
- rcu_read_lock();
- cds_lfht_for_each_entry(agt->events->ht, &iter.iter, aevent,
- node.node) {
- if (!AGENT_EVENT_IS_ENABLED(aevent)) {
- continue;
- }
-
- ret = event_agent_disable(usess, agt, aevent->name);
- if (ret != LTTNG_OK) {
- goto error_unlock;
- }
- }
- ret = LTTNG_OK;
-
-error_unlock:
- rcu_read_unlock();
-error:
- return ret;
-}
projects / lttng-tools.git / blobdiff