From: Mathieu Desnoyers Date: Tue, 9 Nov 2021 20:46:24 +0000 (-0500) Subject: Refactoring: introduce lttng_event_enabler_event_desc_key_match_event X-Git-Url: https://git.lttng.org./?a=commitdiff_plain;h=87eba4bae32262c86fac9c9ad5a8b8b923dbe8f5;p=lttng-ust.git Refactoring: introduce lttng_event_enabler_event_desc_key_match_event Signed-off-by: Mathieu Desnoyers Change-Id: Ib956f6a37f967fe100b6978e36512a01a5d3ae2a --- diff --git a/src/lib/lttng-ust/lttng-events.c b/src/lib/lttng-ust/lttng-events.c index c8746ea1..b9abe12e 100644 --- a/src/lib/lttng-ust/lttng-events.c +++ b/src/lib/lttng-ust/lttng-events.c @@ -1021,6 +1021,65 @@ int lttng_event_register_to_sessiond(struct lttng_event_enabler_common *event_en } } +static +bool lttng_event_enabler_event_desc_key_match_event(struct lttng_event_enabler_common *event_enabler, + const struct lttng_ust_event_desc *desc, + const char *key_string, + struct lttng_ust_event_common *event) +{ + switch (event_enabler->enabler_type) { + case LTTNG_EVENT_ENABLER_TYPE_RECORDER: + { + struct lttng_event_recorder_enabler *event_recorder_enabler = + caa_container_of(event_enabler, struct lttng_event_recorder_enabler, parent.parent); + struct lttng_ust_event_recorder *event_recorder = event->child; + bool same_event = false, same_channel = false, same_token = false; + + WARN_ON_ONCE(!event->priv->desc); + if (event->priv->desc == desc) + same_event = true; + if (event_recorder_enabler->chan == event_recorder->chan) { + same_channel = true; + if (match_event_recorder_token(event_recorder, event_enabler->user_token)) + same_token = true; + } + return same_event && same_channel && same_token; + } + case LTTNG_EVENT_ENABLER_TYPE_NOTIFIER: + { + /* + * Check if event_notifier already exists by checking + * if the event_notifier and enabler share the same + * description and id. + */ + return event->priv->desc == desc && event->priv->user_token == event_enabler->user_token; + } + case LTTNG_EVENT_ENABLER_TYPE_COUNTER: + { + struct lttng_event_counter_enabler *event_counter_enabler = + caa_container_of(event_enabler, struct lttng_event_counter_enabler, parent.parent); + struct lttng_ust_event_counter *event_counter = event->child; + bool same_event = false, same_channel = false, same_key = false, + same_token = false; + + WARN_ON_ONCE(!event->priv->desc); + if (event->priv->desc == desc) + same_event = true; + if (event_counter_enabler->chan == event_counter->chan) { + same_channel = true; + if (match_event_counter_token(event_counter, event_enabler->user_token)) + same_token = true; + } + if (key_string[0] == '\0' || !strcmp(key_string, event_counter->priv->key)) + same_key = true; + return same_event && same_channel && same_key && same_token; + } + default: + WARN_ON_ONCE(1); + return false; + } +} + /* * Supports event creation while tracing session is active. */ @@ -1046,23 +1105,8 @@ int lttng_event_recorder_create(struct lttng_event_recorder_enabler *event_recor lttng_ust_format_event_name(desc, name); name_head = borrow_hash_table_bucket(events_ht->table, LTTNG_UST_EVENT_HT_SIZE, name); cds_hlist_for_each_entry_2(event_priv_iter, name_head, name_hlist_node) { - bool same_event = false, same_channel = false, same_token = false; - struct lttng_ust_event_recorder_private *event_recorder_priv_iter; - - if (event_priv_iter->pub->type != LTTNG_UST_EVENT_TYPE_RECORDER) - continue; - event_recorder_priv_iter = caa_container_of(event_priv_iter, - struct lttng_ust_event_recorder_private, parent.parent); - WARN_ON_ONCE(!event_recorder_priv_iter->parent.parent.desc); - if (event_recorder_priv_iter->parent.parent.desc == desc) - same_event = true; - if (event_recorder_enabler->chan == event_recorder_priv_iter->pub->chan) { - same_channel = true; - if (match_event_recorder_token(event_recorder_priv_iter->pub, - event_recorder_enabler->parent.parent.user_token)) - same_token = true; - } - if (same_event && same_channel && same_token) { + if (lttng_event_enabler_event_desc_key_match_event(&event_recorder_enabler->parent.parent, + desc, key_string, event_priv_iter->pub)) { ret = -EEXIST; goto exist; } @@ -1120,26 +1164,8 @@ int lttng_event_counter_create(struct lttng_event_counter_enabler *event_counter lttng_ust_format_event_name(desc, name); name_head = borrow_hash_table_bucket(events_ht->table, LTTNG_UST_EVENT_HT_SIZE, name); cds_hlist_for_each_entry_2(event_priv_iter, name_head, name_hlist_node) { - struct lttng_ust_event_counter_private *event_counter_priv_iter; - bool same_event = false, same_channel = false, same_key = false, - same_token = false; - - if (event_priv_iter->pub->type != LTTNG_UST_EVENT_TYPE_COUNTER) - continue; - event_counter_priv_iter = caa_container_of(event_priv_iter, - struct lttng_ust_event_counter_private, parent.parent); - WARN_ON_ONCE(!event_counter_priv_iter->parent.parent.desc); - if (event_counter_priv_iter->parent.parent.desc == desc) - same_event = true; - if (event_counter_enabler->chan == event_counter_priv_iter->pub->chan) { - same_channel = true; - if (match_event_counter_token(event_counter_priv_iter->pub, - event_counter_enabler->parent.parent.user_token)) - same_token = true; - } - if (key_string[0] == '\0' || !strcmp(key_string, event_counter_priv_iter->key)) - same_key = true; - if (same_event && same_channel && same_key && same_token) { + if (lttng_event_enabler_event_desc_key_match_event(&event_counter_enabler->parent.parent, + desc, key_string, event_priv_iter->pub)) { ret = -EEXIST; goto exist; } @@ -1189,7 +1215,6 @@ int lttng_event_notifier_create(struct lttng_event_notifier_enabler *event_notif struct cds_hlist_head *head; struct cds_hlist_node *node; int ret = 0; - bool found = false; /* * Get the hashtable bucket the created lttng_event_notifier object @@ -1198,18 +1223,12 @@ int lttng_event_notifier_create(struct lttng_event_notifier_enabler *event_notif lttng_ust_format_event_name(desc, name); head = borrow_hash_table_bucket(events_ht->table, LTTNG_UST_EVENT_HT_SIZE, name); cds_hlist_for_each_entry(event_priv, node, head, name_hlist_node) { - /* - * Check if event_notifier already exists by checking - * if the event_notifier and enabler share the same - * description and id. - */ - if (event_priv->desc == desc && event_priv->user_token == event_notifier_enabler->parent.user_token) { - found = true; - break; + if (lttng_event_enabler_event_desc_key_match_event(&event_notifier_enabler->parent, + desc, key_string, event_priv->pub)) { + ret = -EEXIST; + goto exist; } } - if (found) - return -EEXIST; event = lttng_ust_event_alloc(&event_notifier_enabler->parent, desc, key_string); if (!event) { @@ -1222,6 +1241,7 @@ int lttng_event_notifier_create(struct lttng_event_notifier_enabler *event_notif return 0; error: +exist: return ret; }