X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=src%2Flttng-events.c;h=795286329690b9a3866852b8faa4225c626e7362;hb=a0c6ad2e91bfd5feaa5d6e2ef2a9dff83b0db43c;hp=961f1734ba11125a1fde7e1f3dd979e54b262d65;hpb=cc5719b19489e364bb325d4459d5fdc1f4c681e1;p=lttng-modules.git diff --git a/src/lttng-events.c b/src/lttng-events.c index 961f1734..79528632 100644 --- a/src/lttng-events.c +++ b/src/lttng-events.c @@ -353,7 +353,7 @@ void lttng_session_destroy(struct lttng_kernel_session *session) struct lttng_kernel_channel_buffer_private *chan_priv, *tmpchan_priv; struct lttng_kernel_event_recorder_private *event_recorder_priv, *tmpevent_recorder_priv; struct lttng_metadata_stream *metadata_stream; - struct lttng_event_recorder_enabler *event_recorder_enabler, *tmp_event_recorder_enabler; + struct lttng_event_enabler_common *event_enabler, *tmp_event_enabler; int ret; mutex_lock(&sessions_mutex); @@ -371,9 +371,8 @@ void lttng_session_destroy(struct lttng_kernel_session *session) ret = lttng_syscalls_destroy_syscall_table(&chan_priv->parent.syscall_table); WARN_ON(ret); } - list_for_each_entry_safe(event_recorder_enabler, tmp_event_recorder_enabler, - &session->priv->enablers_head, node) - lttng_event_enabler_destroy(&event_recorder_enabler->parent); + list_for_each_entry_safe(event_enabler, tmp_event_enabler, &session->priv->enablers_head, node) + lttng_event_enabler_destroy(event_enabler); list_for_each_entry_safe(event_recorder_priv, tmpevent_recorder_priv, &session->priv->events, parent.node) _lttng_event_destroy(&event_recorder_priv->pub->parent); list_for_each_entry_safe(chan_priv, tmpchan_priv, &session->priv->chan, node) { @@ -400,7 +399,7 @@ void lttng_session_destroy(struct lttng_kernel_session *session) void lttng_event_notifier_group_destroy( struct lttng_event_notifier_group *event_notifier_group) { - struct lttng_event_notifier_enabler *event_notifier_enabler, *tmp_event_notifier_enabler; + struct lttng_event_enabler_common *event_enabler, *tmp_event_enabler; struct lttng_kernel_event_notifier_private *event_notifier_priv, *tmpevent_notifier_priv; int ret; @@ -426,9 +425,9 @@ void lttng_event_notifier_group_destroy( ret = lttng_syscalls_destroy_syscall_table(&event_notifier_group->syscall_table); WARN_ON(ret); - list_for_each_entry_safe(event_notifier_enabler, tmp_event_notifier_enabler, + list_for_each_entry_safe(event_enabler, tmp_event_enabler, &event_notifier_group->enablers_head, node) - lttng_event_enabler_destroy(&event_notifier_enabler->parent); + lttng_event_enabler_destroy(event_enabler); list_for_each_entry_safe(event_notifier_priv, tmpevent_notifier_priv, &event_notifier_group->event_notifiers_head, parent.node) @@ -2318,11 +2317,10 @@ int lttng_fix_pending_events(void) static bool lttng_event_notifier_group_has_active_event_notifiers( struct lttng_event_notifier_group *event_notifier_group) { - struct lttng_event_notifier_enabler *event_notifier_enabler; + struct lttng_event_enabler_common *event_enabler; - list_for_each_entry(event_notifier_enabler, &event_notifier_group->enablers_head, - node) { - if (event_notifier_enabler->parent.enabled) + list_for_each_entry(event_enabler, &event_notifier_group->enablers_head, node) { + if (event_enabler->enabled) return true; } return false; @@ -2373,8 +2371,8 @@ void lttng_event_enabler_session_add(struct lttng_kernel_session *session, struct lttng_event_recorder_enabler *event_enabler) { mutex_lock(&sessions_mutex); - list_add(&event_enabler->node, &session->priv->enablers_head); - event_enabler->published = true; + list_add(&event_enabler->parent.node, &session->priv->enablers_head); + event_enabler->parent.published = true; lttng_session_lazy_sync_event_enablers(session); mutex_unlock(&sessions_mutex); } @@ -2470,15 +2468,16 @@ void lttng_enabler_destroy(struct lttng_event_enabler_common *enabler) void lttng_event_enabler_destroy(struct lttng_event_enabler_common *event_enabler) { + lttng_enabler_destroy(event_enabler); + if (event_enabler->published) + list_del(&event_enabler->node); + switch (event_enabler->enabler_type) { case LTTNG_EVENT_ENABLER_TYPE_RECORDER: { struct lttng_event_recorder_enabler *event_recorder_enabler = container_of(event_enabler, struct lttng_event_recorder_enabler, parent); - lttng_enabler_destroy(event_enabler); - if (event_recorder_enabler->published) - list_del(&event_recorder_enabler->node); kfree(event_recorder_enabler); break; } @@ -2487,9 +2486,6 @@ void lttng_event_enabler_destroy(struct lttng_event_enabler_common *event_enable struct lttng_event_notifier_enabler *event_notifier_enabler = container_of(event_enabler, struct lttng_event_notifier_enabler, parent); - lttng_enabler_destroy(event_enabler); - if (event_notifier_enabler->published) - list_del(&event_notifier_enabler->node); kfree(event_notifier_enabler); break; } @@ -2530,8 +2526,8 @@ void lttng_event_notifier_enabler_group_add(struct lttng_event_notifier_group *e struct lttng_event_notifier_enabler *event_notifier_enabler) { mutex_lock(&sessions_mutex); - list_add(&event_notifier_enabler->node, &event_notifier_enabler->group->enablers_head); - event_notifier_enabler->published = true; + list_add(&event_notifier_enabler->parent.node, &event_notifier_enabler->group->enablers_head); + event_notifier_enabler->parent.published = true; lttng_event_notifier_group_sync_enablers(event_notifier_enabler->group); mutex_unlock(&sessions_mutex); } @@ -2649,69 +2645,116 @@ void lttng_event_sync_capture_state(struct lttng_kernel_event_common *event) } } +static +bool lttng_get_event_enabled_state(struct lttng_kernel_event_common *event) +{ + struct lttng_enabler_ref *enabler_ref; + bool enabled = false; + + switch (event->priv->instrumentation) { + case LTTNG_KERNEL_ABI_TRACEPOINT: + lttng_fallthrough; + case LTTNG_KERNEL_ABI_SYSCALL: + /* Enable events */ + list_for_each_entry(enabler_ref, &event->priv->enablers_ref_head, node) { + if (enabler_ref->ref->enabled) { + enabled = true; + break; + } + } + break; + default: + WARN_ON_ONCE(1); + return false; + } + + switch (event->type) { + case LTTNG_KERNEL_EVENT_TYPE_RECORDER: + { + struct lttng_kernel_event_recorder *event_recorder = + container_of(event, struct lttng_kernel_event_recorder, parent); + + /* + * Enabled state is based on union of enablers, with + * intersection of session and channel transient enable + * states. + */ + return enabled && event_recorder->chan->parent.session->priv->tstate && event_recorder->chan->priv->parent.tstate; + } + case LTTNG_KERNEL_EVENT_TYPE_NOTIFIER: + return enabled; + default: + WARN_ON_ONCE(1); + return false; + } +} + +static +bool lttng_event_is_lazy_sync(struct lttng_kernel_event_common *event) +{ + switch (event->priv->instrumentation) { + case LTTNG_KERNEL_ABI_TRACEPOINT: + lttng_fallthrough; + case LTTNG_KERNEL_ABI_SYSCALL: + return true; + + default: + /* Not handled with lazy sync. */ + return false; + } +} + /* - * lttng_session_sync_event_enablers should be called just before starting a - * session. * Should be called with sessions mutex held. */ static -void lttng_session_sync_event_enablers(struct lttng_kernel_session *session) +void lttng_sync_event_list(struct list_head *event_enabler_list, + struct list_head *event_list) { - struct lttng_event_recorder_enabler *event_enabler; - struct lttng_kernel_event_recorder_private *event_recorder_priv; + struct lttng_kernel_event_common_private *event_priv; + struct lttng_event_enabler_common *event_enabler; + + list_for_each_entry(event_enabler, event_enabler_list, node) + lttng_event_enabler_ref_events(event_enabler); - list_for_each_entry(event_enabler, &session->priv->enablers_head, node) - lttng_event_enabler_ref_events(&event_enabler->parent); /* * For each event, if at least one of its enablers is enabled, * and its channel and session transient states are enabled, we * enable the event, else we disable it. */ - list_for_each_entry(event_recorder_priv, &session->priv->events, parent.node) { - struct lttng_kernel_event_recorder *event_recorder = event_recorder_priv->pub; - struct lttng_enabler_ref *enabler_ref; - int enabled = 0; - - switch (event_recorder_priv->parent.instrumentation) { - case LTTNG_KERNEL_ABI_TRACEPOINT: - lttng_fallthrough; - case LTTNG_KERNEL_ABI_SYSCALL: - /* Enable events */ - list_for_each_entry(enabler_ref, - &event_recorder_priv->parent.enablers_ref_head, node) { - if (enabler_ref->ref->enabled) { - enabled = 1; - break; - } - } - break; + list_for_each_entry(event_priv, event_list, node) { + struct lttng_kernel_event_common *event = event_priv->pub; + bool enabled; - default: - /* Not handled with lazy sync. */ + if (!lttng_event_is_lazy_sync(event)) continue; - } - /* - * Enabled state is based on union of enablers, with - * intesection of session and channel transient enable - * states. - */ - enabled = enabled && session->priv->tstate && event_recorder->chan->priv->parent.tstate; - WRITE_ONCE(event_recorder->parent.enabled, enabled); + enabled = lttng_get_event_enabled_state(event); + WRITE_ONCE(event->enabled, enabled); /* - * Sync tracepoint registration with event enabled - * state. + * Sync tracepoint registration with event enabled state. */ if (enabled) { - register_event(&event_recorder->parent); + register_event(event); } else { - _lttng_event_unregister(&event_recorder->parent); + _lttng_event_unregister(event); } - lttng_event_sync_filter_state(&event_recorder_priv->pub->parent); + lttng_event_sync_filter_state(event); + lttng_event_sync_capture_state(event); } } +/* + * lttng_session_sync_event_enablers should be called just before starting a + * session. + */ +static +void lttng_session_sync_event_enablers(struct lttng_kernel_session *session) +{ + lttng_sync_event_list(&session->priv->enablers_head, &session->priv->events); +} + /* * Apply enablers to session events, adding events to session if need * be. It is required after each modification applied to an active @@ -2731,56 +2774,7 @@ void lttng_session_lazy_sync_event_enablers(struct lttng_kernel_session *session static void lttng_event_notifier_group_sync_enablers(struct lttng_event_notifier_group *event_notifier_group) { - struct lttng_event_notifier_enabler *event_notifier_enabler; - struct lttng_kernel_event_notifier_private *event_notifier_priv; - - list_for_each_entry(event_notifier_enabler, &event_notifier_group->enablers_head, node) - lttng_event_enabler_ref_events(&event_notifier_enabler->parent); - - /* - * For each event_notifier, if at least one of its enablers is enabled, - * we enable the event_notifier, else we disable it. - */ - list_for_each_entry(event_notifier_priv, &event_notifier_group->event_notifiers_head, parent.node) { - struct lttng_kernel_event_notifier *event_notifier = event_notifier_priv->pub; - struct lttng_enabler_ref *enabler_ref; - int enabled = 0; - - switch (event_notifier_priv->parent.instrumentation) { - case LTTNG_KERNEL_ABI_TRACEPOINT: - lttng_fallthrough; - case LTTNG_KERNEL_ABI_SYSCALL: - /* Enable event_notifiers */ - list_for_each_entry(enabler_ref, - &event_notifier_priv->parent.enablers_ref_head, node) { - if (enabler_ref->ref->enabled) { - enabled = 1; - break; - } - } - break; - - default: - /* Not handled with sync. */ - continue; - } - - WRITE_ONCE(event_notifier->parent.enabled, enabled); - /* - * Sync tracepoint registration with event_notifier enabled - * state. - */ - if (enabled) { - if (!event_notifier_priv->parent.registered) - register_event(&event_notifier->parent); - } else { - if (event_notifier_priv->parent.registered) - _lttng_event_unregister(&event_notifier->parent); - } - - lttng_event_sync_filter_state(&event_notifier_priv->pub->parent); - lttng_event_sync_capture_state(&event_notifier_priv->pub->parent); - } + lttng_sync_event_list(&event_notifier_group->enablers_head, &event_notifier_group->event_notifiers_head); } static