+++ /dev/null
-#ifndef _STREAM_H
-#define _STREAM_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 <common/hashtable/hashtable.h>
-#include <common/trace-chunk.h>
-#include <common/optional.h>
-#include <common/buffer-view.h>
-
-#include "session.h"
-#include "tracefile-array.h"
-
-struct lttcomm_relayd_index;
-
-struct relay_stream_rotation {
- /*
- * Indicates if the stream's data and index have been rotated. A
- * rotation is considered completed when both rotations have occurred.
- */
- bool data_rotated;
- bool index_rotated;
- /*
- * Packet sequence number of the first packet of the new trace chunk to
- * which the stream is rotating.
- */
- uint64_t packet_seq_num;
- /*
- * Monotonically increasing previous network sequence number of first
- * data packet of the new trace chunk to which the stream is rotating.
- */
- uint64_t prev_data_net_seq;
- struct lttng_trace_chunk *next_trace_chunk;
-};
-
-/*
- * Represents a stream in the relay
- */
-struct relay_stream {
- uint64_t stream_handle;
-
- struct urcu_ref ref;
- /* Back reference to trace. Protected by refcount on trace object. */
- struct ctf_trace *trace;
-
- /*
- * To protect from concurrent read/update. The viewer stream
- * lock nests inside the stream lock. The stream lock nests
- * inside the ctf_trace lock.
- */
- pthread_mutex_t lock;
- /* previous data sequence number written to disk. */
- uint64_t prev_data_seq;
- /* previous index sequence number written to disk. */
- uint64_t prev_index_seq;
- /* seq num to encounter before closing. */
- uint64_t last_net_seq_num;
-
- struct fs_handle *file;
- /* index file on which to write the index data. */
- struct lttng_index_file *index_file;
-
- char *path_name;
- char *channel_name;
-
- /* On-disk circular buffer of tracefiles. */
- uint64_t tracefile_size;
- uint64_t tracefile_size_current;
- /* Max number of trace files for this stream. */
- uint64_t tracefile_count;
- /*
- * Index of the currently active file for this stream's on-disk
- * ring buffer.
- */
- uint64_t tracefile_current_index;
- /*
- * Indicates that the on-disk buffer has wrapped around. Stream
- * files shall be unlinked before being opened after this has occurred.
- */
- bool tracefile_wrapped_around;
-
- /*
- * Position in the tracefile where we have the full index also on disk.
- */
- uint64_t pos_after_last_complete_data_index;
-
- /*
- * Counts the number of received indexes. The "tag" associated
- * with an index is taken before incrementing this seqcount.
- * Therefore, the sequence tag associated with the last index
- * received is always index_received_seqcount - 1.
- */
- uint64_t index_received_seqcount;
-
- /*
- * Packet sequence number of the last received packet index.
- * Only populated when interacting with CTF_INDEX 1.1+.
- */
- LTTNG_OPTIONAL(uint64_t) received_packet_seq_num;
-
- /*
- * Tracefile array is an index of the stream trace files,
- * indexed by position. It allows keeping track of the oldest
- * available indexes when overwriting trace files in tracefile
- * rotation.
- */
- struct tracefile_array *tfa;
-
- bool closed; /* Stream is closed. */
- bool close_requested; /* Close command has been received. */
-
- /*
- * Counts number of indexes in indexes_ht. Redundant info.
- * Protected by stream lock.
- */
- int indexes_in_flight;
- struct lttng_ht *indexes_ht;
-
- /*
- * If the stream is inactive, this field is updated with the
- * live beacon timestamp end, when it is active, this
- * field == -1ULL.
- */
- uint64_t beacon_ts_end;
-
- /* CTF stream ID, -1ULL when unset (first packet not received yet). */
- uint64_t ctf_stream_id;
-
- /* Indicate if the stream was initialized for a data pending command. */
- bool data_pending_check_done;
-
- /* Is this stream a metadata stream ? */
- bool is_metadata;
- /* Amount of metadata received (bytes). */
- uint64_t metadata_received;
-
- /*
- * Member of the stream list in struct ctf_trace.
- * Updates are protected by the stream_list_lock.
- * Traversals are protected by RCU.
- */
- struct cds_list_head stream_node;
- /*
- * Temporary list belonging to the connection until all streams
- * are received for that connection.
- * Member of the stream recv list in the connection.
- * Updates are protected by the stream_recv_list_lock.
- * Traversals are protected by RCU.
- */
- bool in_recv_list;
- struct cds_list_head recv_node;
- /* Protected by session lock. */
- bool published;
- /* Notified viewer that no new metadata is available. */
- bool no_new_metadata_notified;
- /*
- * Node of stream within global stream hash table.
- */
- struct lttng_ht_node_u64 node;
- bool in_stream_ht; /* is stream in stream hash table. */
- struct rcu_head rcu_node; /* For call_rcu teardown. */
- /*
- * The trace chunk to which the file currently being produced (if any)
- * belongs.
- *
- * Note that a relay stream can have no output trace chunk. For
- * instance, after a session stop followed by a session clear,
- * streams will not have an output trace chunk until the session
- * is resumed.
- */
- struct lttng_trace_chunk *trace_chunk;
- LTTNG_OPTIONAL(struct relay_stream_rotation) ongoing_rotation;
- uint64_t completed_rotation_count;
-};
-
-struct relay_stream *stream_create(struct ctf_trace *trace,
- uint64_t stream_handle, char *path_name,
- char *channel_name, uint64_t tracefile_size,
- uint64_t tracefile_count);
-
-struct relay_stream *stream_get_by_id(uint64_t stream_id);
-bool stream_get(struct relay_stream *stream);
-void stream_put(struct relay_stream *stream);
-int stream_rotate_output_files(struct relay_session *session,
- struct relay_stream *stream);
-int stream_set_pending_rotation(struct relay_stream *stream,
- struct lttng_trace_chunk *next_trace_chunk,
- uint64_t rotation_sequence_number);
-void try_stream_close(struct relay_stream *stream);
-void stream_publish(struct relay_stream *stream);
-int stream_init_packet(struct relay_stream *stream, size_t packet_size,
- bool *file_rotated);
-int stream_write(struct relay_stream *stream,
- const struct lttng_buffer_view *packet, size_t padding_len);
-/* Called after the reception of a complete data packet. */
-int stream_update_index(struct relay_stream *stream, uint64_t net_seq_num,
- bool rotate_index, bool *flushed, uint64_t total_size);
-int stream_complete_packet(struct relay_stream *stream,
- size_t packet_total_size, uint64_t sequence_number,
- bool index_flushed);
-/* Index info is in host endianness. */
-int stream_add_index(struct relay_stream *stream,
- const struct lttcomm_relayd_index *index_info);
-int stream_reset_file(struct relay_stream *stream);
-
-void print_relay_streams(void);
-
-#endif /* _STREAM_H */
projects / lttng-tools.git / blobdiff