+++ /dev/null
-#ifndef _SESSION_H
-#define _SESSION_H
-
-/*
- * Copyright (C) 2013 Julien Desfossez <jdesfossez@efficios.com>
- * Copyright (C) 2013 David Goulet <dgoulet@efficios.com>
- * Copyright (C) 2015 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *
- * SPDX-License-Identifier: GPL-2.0-only
- *
- */
-
-#include <limits.h>
-#include <inttypes.h>
-#include <pthread.h>
-#include <urcu/list.h>
-#include <urcu/ref.h>
-
-#include <lttng/constant.h>
-#include <common/hashtable/hashtable.h>
-#include <common/uuid.h>
-#include <common/trace-chunk.h>
-#include <common/optional.h>
-
-/*
- * Represents a session for the relay point of view
- */
-struct relay_session {
- /*
- * This session id is generated by the relay daemon to guarantee
- * its uniqueness even when serving multiple session daemons.
- * It is used to match a set of streams to their session.
- */
- uint64_t id;
- /*
- * ID of the session in the session daemon's domain.
- * This information is only provided by 2.11+ peers.
- */
- LTTNG_OPTIONAL(uint64_t) id_sessiond;
- /*
- * Only provided by 2.11+ peers. However, the UUID is set to 'nil' in
- * the other cases.
- */
- lttng_uuid sessiond_uuid;
- /*
- * Contains the creation time on the session daemon's end for 2.11+
- * peers. Otherwise, this contains the session creation time on the
- * relay daemon's end.
- */
- LTTNG_OPTIONAL(time_t) creation_time;
- /* Must _not_ be empty for 2.4+ peers. */
- char session_name[LTTNG_NAME_MAX];
- char hostname[LTTNG_HOST_NAME_MAX];
- char base_path[LTTNG_PATH_MAX];
- /*
- * Session output path relative to relayd's output path.
- * Will be empty when interacting with peers < 2.11 since their
- * streams' path are expressed relative to the relay daemon's
- * output path.
- */
- char output_path[LTTNG_PATH_MAX];
- uint32_t live_timer;
-
- /* Session in snapshot mode. */
- bool snapshot;
-
- /*
- * Session has no back reference to its connection because it
- * has a life-time that can be longer than the consumer connection's
- * life-time; a reference can still be held by the viewer
- * connection through the viewer streams.
- */
-
- struct urcu_ref ref;
-
- mutable pthread_mutex_t lock;
-
- /* major/minor version used for this session. */
- uint32_t major;
- uint32_t minor;
-
- bool viewer_attached;
- /* Tell if the session connection has been closed on the streaming side. */
- bool connection_closed;
-
- /*
- * Tell if the session is currently living in a exiting relayd and
- * should be cleaned forcefully without waiting for pending data or
- * pending ctrl data.
- */
- bool aborted;
-
- bool session_name_contains_creation_time;
- /* Whether session has performed an explicit rotation. */
- bool has_rotated;
-
- /* Contains ctf_trace object of that session indexed by path name. */
- struct lttng_ht *ctf_traces_ht;
-
- /*
- * This contains streams that are received on that connection.
- * It's used to store them until we get the streams sent
- * command. When this is received, we remove those streams from
- * the list and publish them.
- *
- * Updates are protected by the recv_list_lock.
- * Traversals are protected by RCU.
- * recv_list_lock also protects stream_count.
- */
- struct cds_list_head recv_list; /* RCU list. */
- uint32_t stream_count;
- pthread_mutex_t recv_list_lock;
-
- /*
- * Flag checked and exchanged with uatomic_cmpxchg to tell the
- * viewer-side if new streams got added since the last check.
- */
- unsigned long new_streams;
-
- /*
- * Node in the global session hash table.
- */
- struct lttng_ht_node_u64 session_n;
- /*
- * Member of the session list in struct relay_viewer_session.
- * Updates are protected by the relay_viewer_session
- * session_list_lock. Traversals are protected by RCU.
- */
- struct cds_list_head viewer_session_node;
- struct lttng_trace_chunk *current_trace_chunk;
- struct lttng_trace_chunk *pending_closure_trace_chunk;
- /*
- * Prevent live viewers from taking of copy of the chunk
- * while new chunk has a temporary directory name.
- */
- bool ongoing_rotation;
- struct lttng_directory_handle *output_directory;
- struct rcu_head rcu_node; /* For call_rcu teardown. */
-};
-
-struct relay_session *session_create(const char *session_name,
- const char *hostname, const char *base_path,
- uint32_t live_timer,
- bool snapshot,
- const lttng_uuid sessiond_uuid,
- const uint64_t *id_sessiond,
- const uint64_t *current_chunk_id,
- const time_t *creation_time,
- uint32_t major,
- uint32_t minor,
- bool session_name_contains_creation_timestamp);
-struct relay_session *session_get_by_id(uint64_t id);
-bool session_get(struct relay_session *session);
-void session_put(struct relay_session *session);
-
-int session_close(struct relay_session *session);
-int session_abort(struct relay_session *session);
-
-bool session_has_ongoing_rotation(const struct relay_session *session);
-
-void print_sessions(void);
-
-#endif /* _SESSION_H */
projects / lttng-tools.git / blobdiff