SoW-2020-0002: Trace Hit Counters: trigger error reporting integration

[lttng-tools.git] / src / bin / lttng-sessiond / condition-internal.c

diff --git a/src/bin/lttng-sessiond/condition-internal.c b/src/bin/lttng-sessiond/condition-internal.c
new file mode 100644 (file)
index 0000000..43c214c
--- /dev/null
+++ b/src/bin/lttng-sessiond/condition-internal.c
@@ -0,0 +1,133 @@
+/*
+ * Copyright (C) 2020 Francis Deslauriers <francis.deslauriers@efficios.com>
+ *
+ * SPDX-License-Identifier: LGPL-2.1-only
+ *
+ */
+
+#include <common/hashtable/utils.h>
+#include <common/hashtable/hashtable.h>
+
+#include <lttng/condition/condition.h>
+#include <lttng/condition/condition-internal.h>
+#include <lttng/condition/buffer-usage-internal.h>
+#include <lttng/condition/session-consumed-size-internal.h>
+#include <lttng/condition/session-rotation-internal.h>
+#include <lttng/condition/event-rule-internal.h>
+#include "condition-internal.h"
+
+static
+unsigned long lttng_condition_buffer_usage_hash(
+       const struct lttng_condition *_condition)
+{
+       unsigned long hash;
+       unsigned long condition_type;
+       struct lttng_condition_buffer_usage *condition;
+
+       condition = container_of(_condition,
+                       struct lttng_condition_buffer_usage, parent);
+
+       condition_type = (unsigned long) condition->parent.type;
+       hash = hash_key_ulong((void *) condition_type, lttng_ht_seed);
+       if (condition->session_name) {
+               hash ^= hash_key_str(condition->session_name, lttng_ht_seed);
+       }
+       if (condition->channel_name) {
+               hash ^= hash_key_str(condition->channel_name, lttng_ht_seed);
+       }
+       if (condition->domain.set) {
+               hash ^= hash_key_ulong(
+                               (void *) condition->domain.type,
+                               lttng_ht_seed);
+       }
+       if (condition->threshold_ratio.set) {
+               uint64_t val;
+
+               val = condition->threshold_ratio.value * (double) UINT32_MAX;
+               hash ^= hash_key_u64(&val, lttng_ht_seed);
+       } else if (condition->threshold_bytes.set) {
+               uint64_t val;
+
+               val = condition->threshold_bytes.value;
+               hash ^= hash_key_u64(&val, lttng_ht_seed);
+       }
+       return hash;
+}
+
+static
+unsigned long lttng_condition_session_consumed_size_hash(
+       const struct lttng_condition *_condition)
+{
+       unsigned long hash;
+       unsigned long condition_type =
+                       (unsigned long) LTTNG_CONDITION_TYPE_SESSION_CONSUMED_SIZE;
+       struct lttng_condition_session_consumed_size *condition;
+       uint64_t val;
+
+       condition = container_of(_condition,
+                       struct lttng_condition_session_consumed_size, parent);
+
+       hash = hash_key_ulong((void *) condition_type, lttng_ht_seed);
+       if (condition->session_name) {
+               hash ^= hash_key_str(condition->session_name, lttng_ht_seed);
+       }
+       val = condition->consumed_threshold_bytes.value;
+       hash ^= hash_key_u64(&val, lttng_ht_seed);
+       return hash;
+}
+
+static
+unsigned long lttng_condition_session_rotation_hash(
+       const struct lttng_condition *_condition)
+{
+       unsigned long hash, condition_type;
+       struct lttng_condition_session_rotation *condition;
+
+       condition = container_of(_condition,
+                       struct lttng_condition_session_rotation, parent);
+       condition_type = (unsigned long) condition->parent.type;
+       hash = hash_key_ulong((void *) condition_type, lttng_ht_seed);
+       assert(condition->session_name);
+       hash ^= hash_key_str(condition->session_name, lttng_ht_seed);
+       return hash;
+}
+
+static
+unsigned long lttng_condition_event_rule_hash(
+       const struct lttng_condition *_condition)
+{
+       unsigned long hash, condition_type;
+       struct lttng_condition_event_rule *condition;
+
+       condition = container_of(_condition,
+                       struct lttng_condition_event_rule, parent);
+       condition_type = (unsigned long) condition->parent.type;
+       hash = hash_key_ulong((void *) condition_type, lttng_ht_seed);
+
+       /* TODO: further hasg using the event rule? on pattern maybe?*/
+       return hash;
+}
+
+/*
+ * The lttng_condition hashing code is kept in this file (rather than
+ * condition.c) since it makes use of GPLv2 code (hashtable utils), which we
+ * don't want to link in liblttng-ctl.
+ */
+unsigned long lttng_condition_hash(const struct lttng_condition *condition)
+{
+       switch (condition->type) {
+       case LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW:
+       case LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH:
+               return lttng_condition_buffer_usage_hash(condition);
+       case LTTNG_CONDITION_TYPE_SESSION_CONSUMED_SIZE:
+               return lttng_condition_session_consumed_size_hash(condition);
+       case LTTNG_CONDITION_TYPE_SESSION_ROTATION_ONGOING:
+       case LTTNG_CONDITION_TYPE_SESSION_ROTATION_COMPLETED:
+               return lttng_condition_session_rotation_hash(condition);
+       case LTTNG_CONDITION_TYPE_EVENT_RULE_HIT:
+               return lttng_condition_event_rule_hash(condition);
+       default:
+               //ERR("[notification-thread] Unexpected condition type caught");
+               abort();
+       }
+}