--- /dev/null
+/*
+ * Copyright (C) 2011 EfficiOS Inc.
+ *
+ * SPDX-License-Identifier: GPL-2.0-only
+ *
+ */
+
+#ifndef _LTT_TRACE_KERNEL_H
+#define _LTT_TRACE_KERNEL_H
+
+#include <urcu/list.h>
+
+#include <lttng/lttng.h>
+#include <common/lttng-kernel.hpp>
+#include <common/lttng-kernel-old.hpp>
+#include <common/defaults.hpp>
+
+#include "consumer.hpp"
+#include "tracker.hpp"
+
+/* Kernel event list */
+struct ltt_kernel_event_list {
+ struct cds_list_head head;
+};
+
+/* Channel stream list */
+struct ltt_kernel_stream_list {
+ struct cds_list_head head;
+};
+
+/* Channel list */
+struct ltt_kernel_channel_list {
+ struct cds_list_head head;
+};
+
+struct ltt_kernel_context {
+ struct lttng_kernel_abi_context ctx;
+ struct cds_list_head list;
+ /* Indicates whether or not the context is in a list. */
+ bool in_list;
+};
+
+/* Kernel event */
+struct ltt_kernel_event {
+ int fd;
+ int enabled;
+ enum lttng_event_type type;
+ struct lttng_kernel_abi_event *event;
+ struct cds_list_head list;
+ char *filter_expression;
+ struct lttng_bytecode *filter;
+ struct lttng_userspace_probe_location *userspace_probe_location;
+};
+
+/* Kernel event */
+struct ltt_kernel_event_notifier_rule {
+ int fd;
+ uint64_t error_counter_index;
+ int enabled;
+ enum lttng_event_type type;
+ struct lttng_trigger *trigger;
+ uint64_t token;
+ const struct lttng_bytecode *filter;
+ struct lttng_userspace_probe_location *userspace_probe_location;
+ struct cds_lfht_node ht_node;
+ /* call_rcu delayed reclaim. */
+ struct rcu_head rcu_node;
+};
+
+/* Kernel channel */
+struct ltt_kernel_channel {
+ int fd;
+ uint64_t key; /* Key to reference this channel with the consumer. */
+ int enabled;
+ unsigned int stream_count;
+ unsigned int event_count;
+ bool published_to_notification_thread;
+ struct cds_list_head ctx_list;
+ struct lttng_channel *channel;
+ struct ltt_kernel_event_list events_list;
+ struct ltt_kernel_stream_list stream_list;
+ struct cds_list_head list;
+ /* Session pointer which has a reference to this object. */
+ struct ltt_kernel_session *session;
+ bool sent_to_consumer;
+};
+
+/* Metadata */
+struct ltt_kernel_metadata {
+ int fd;
+ uint64_t key; /* Key to reference this channel with the consumer. */
+ struct lttng_channel *conf;
+};
+
+/* Channel stream */
+struct ltt_kernel_stream {
+ int fd;
+ int state;
+ int cpu;
+ bool sent_to_consumer;
+ /* Format is %s_%d respectively channel name and CPU number. */
+ char name[DEFAULT_STREAM_NAME_LEN];
+ uint64_t tracefile_size;
+ uint64_t tracefile_count;
+ struct cds_list_head list;
+};
+
+/* Kernel session */
+struct ltt_kernel_session {
+ int fd;
+ int metadata_stream_fd;
+ int consumer_fds_sent;
+ unsigned int channel_count;
+ unsigned int stream_count_global;
+ struct ltt_kernel_metadata *metadata;
+ struct ltt_kernel_channel_list channel_list;
+ /* UID/GID of the user owning the session */
+ uid_t uid;
+ gid_t gid;
+ struct consumer_output *consumer;
+ /* Tracing session id */
+ uint64_t id;
+ /* Session is active or not meaning it has been started or stopped. */
+ unsigned int active:1;
+ /* 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;
+ bool is_live_session;
+ /* Current trace chunk of the ltt_session. */
+ struct lttng_trace_chunk *current_trace_chunk;
+ /* Tracker lists */
+ struct process_attr_tracker *tracker_pid;
+ struct process_attr_tracker *tracker_vpid;
+ struct process_attr_tracker *tracker_uid;
+ struct process_attr_tracker *tracker_vuid;
+ struct process_attr_tracker *tracker_gid;
+ struct process_attr_tracker *tracker_vgid;
+};
+
+/*
+ * Lookup functions. NULL is returned if not found.
+ */
+struct ltt_kernel_event *trace_kernel_get_event_by_name(
+ char *name, struct ltt_kernel_channel *channel,
+ enum lttng_event_type type);
+struct ltt_kernel_event *trace_kernel_find_event(
+ char *name, struct ltt_kernel_channel *channel,
+ enum lttng_event_type type,
+ struct lttng_bytecode *filter);
+struct ltt_kernel_channel *trace_kernel_get_channel_by_name(
+ const char *name, struct ltt_kernel_session *session);
+
+/*
+ * Create functions malloc() the data structure.
+ */
+struct ltt_kernel_session *trace_kernel_create_session(void);
+struct ltt_kernel_channel *trace_kernel_create_channel(
+ struct lttng_channel *chan);
+enum lttng_error_code trace_kernel_create_event(struct lttng_event *ev,
+ char *filter_expression, struct lttng_bytecode *filter,
+ struct ltt_kernel_event **kernel_event);
+struct ltt_kernel_metadata *trace_kernel_create_metadata(void);
+struct ltt_kernel_stream *trace_kernel_create_stream(const char *name,
+ unsigned int count);
+struct ltt_kernel_context *trace_kernel_create_context(
+ struct lttng_kernel_abi_context *ctx);
+/* Trigger is only non-const to acquire a reference. */
+enum lttng_error_code trace_kernel_create_event_notifier_rule(
+ struct lttng_trigger *trigger,
+ uint64_t token,
+ uint64_t error_counter_index,
+ struct ltt_kernel_event_notifier_rule **event_notifier_rule);
+struct ltt_kernel_context *trace_kernel_copy_context(
+ struct ltt_kernel_context *ctx);
+enum lttng_error_code trace_kernel_init_event_notifier_from_event_rule(
+ const struct lttng_event_rule *rule,
+ struct lttng_kernel_abi_event_notifier *kernel_event_notifier);
+
+/*
+ * Destroy functions free() the data structure and remove from linked list if
+ * it's applies.
+ */
+void trace_kernel_destroy_session(struct ltt_kernel_session *session);
+void trace_kernel_destroy_metadata(struct ltt_kernel_metadata *metadata);
+void trace_kernel_destroy_channel(struct ltt_kernel_channel *channel);
+void trace_kernel_destroy_event(struct ltt_kernel_event *event);
+void trace_kernel_destroy_stream(struct ltt_kernel_stream *stream);
+void trace_kernel_destroy_context(struct ltt_kernel_context *ctx);
+void trace_kernel_destroy_event_notifier_rule(struct ltt_kernel_event_notifier_rule *rule);
+void trace_kernel_free_session(struct ltt_kernel_session *session);
+
+#endif /* _LTT_TRACE_KERNEL_H */
projects / lttng-tools.git / blobdiff