X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fbin%2Flttng-relayd%2Flttng-relayd.h;h=e64bb373fa4200964eae2995374d2d8556766e4c;hp=0af8e0f1d963199b5a6bb82c28b244a33daa6b6c;hb=HEAD;hpb=cef0f7d51b8025d3ba04e6496242c1cca1641aa6 diff --git a/src/bin/lttng-relayd/lttng-relayd.h b/src/bin/lttng-relayd/lttng-relayd.h deleted file mode 100644 index 0af8e0f1d..000000000 --- a/src/bin/lttng-relayd/lttng-relayd.h +++ /dev/null @@ -1,221 +0,0 @@ -/* - * Copyright (C) 2012 - Julien Desfossez - * David Goulet - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License, version 2 only, - * as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. - * - * You should have received a copy of the GNU General Public License along - * with this program; if not, write to the Free Software Foundation, Inc., - * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. - */ - -#ifndef LTTNG_RELAYD_H -#define LTTNG_RELAYD_H - -#define _LGPL_SOURCE -#include -#include -#include - -#include -#include - -#include "ctf-trace.h" - -/* - * Queue used to enqueue relay requests - */ -struct relay_cmd_queue { - struct cds_wfq_queue queue; - int32_t futex; -}; - -enum connection_type { - RELAY_DATA = 1, - RELAY_CONTROL = 2, - RELAY_VIEWER_COMMAND = 3, - RELAY_VIEWER_NOTIFICATION = 4, -}; - -/* - * Represents a session for the relay point of view - */ -struct relay_session { - /* - * This session id is used to identify a set of stream to a tracing session - * but also make sure we have a unique session id associated with a session - * daemon which can provide multiple data source. - */ - uint64_t id; - struct lttcomm_sock *sock; - char session_name[NAME_MAX]; - char hostname[HOST_NAME_MAX]; - uint32_t live_timer; - struct lttng_ht_node_ulong session_n; - struct rcu_head rcu_node; - uint32_t viewer_attached; - uint32_t stream_count; - /* Tell if this session is for a snapshot or not. */ - unsigned int snapshot:1; - - /* - * Indicate version protocol for this session. This is especially useful - * for the data thread that has no idea which version it operates on since - * linking control/data sockets is non trivial. - */ - uint64_t minor; - uint64_t major; -}; - -/* - * Represents a stream in the relay - */ -struct relay_stream { - uint64_t stream_handle; - uint64_t prev_seq; /* previous data sequence number encountered */ - struct lttng_ht_node_ulong stream_n; - struct relay_session *session; - struct rcu_head rcu_node; - int fd; - /* FD on which to write the index data. */ - int index_fd; - /* FD on which to read the index data for the viewer. */ - int read_index_fd; - - char *path_name; - char *channel_name; - /* on-disk circular buffer of tracefiles */ - uint64_t tracefile_size; - uint64_t tracefile_size_current; - uint64_t tracefile_count; - uint64_t tracefile_count_current; - /* To inform the viewer up to where it can go back in time. */ - uint64_t oldest_tracefile_id; - - uint64_t total_index_received; - struct relay_viewer_stream *viewer_stream; - uint64_t last_net_seq_num; - - /* - * This node is added to the *control* connection hash table and the - * pointer is copied in here so we can access it when deleting this object. - * When deleting this, the ctf trace ht MUST NOT be destroyed. This happens - * at connection deletion. - */ - struct lttng_ht_node_str ctf_trace_node; - struct lttng_ht *ctf_traces_ht; - - /* - * To protect from concurrent read/update between the - * streaming-side and the viewer-side. - * This lock must be held, we reading/updating the - * ctf_trace pointer. - */ - pthread_mutex_t lock; - - struct ctf_trace *ctf_trace; - /* - * 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; - /* - * To protect the update of the close_write_flag and the checks of - * the tracefile_count_current. - * It is taken before checking whenever we need to know if the - * writer and reader are working in the same tracefile. - */ - pthread_mutex_t viewer_stream_rotation_lock; - - /* Information telling us when to close the stream */ - unsigned int close_flag:1; - /* Indicate if the stream was initialized for a data pending command. */ - unsigned int data_pending_check_done:1; - unsigned int metadata_flag:1; - /* - * To detect when we start overwriting old data, it is used to - * update the oldest_tracefile_id. - */ - unsigned int tracefile_overwrite:1; -}; - -/* - * Shadow copy of the relay_stream structure for the viewer side. The only - * fields updated by the writer (streaming side) after allocation are : - * total_index_received and close_flag. Everything else is updated by the - * reader (viewer side). - */ -struct relay_viewer_stream { - uint64_t stream_handle; - uint64_t session_id; - int read_fd; - int index_read_fd; - char *path_name; - char *channel_name; - uint64_t last_sent_index; - uint64_t total_index_received; - uint64_t tracefile_count; - uint64_t tracefile_count_current; - struct lttng_ht_node_u64 stream_n; - struct rcu_head rcu_node; - struct ctf_trace *ctf_trace; - /* - * This lock blocks only when the writer is about to start overwriting - * a file currently read by the reader. - */ - pthread_mutex_t overwrite_lock; - /* Information telling us if the stream is a metadata stream. */ - unsigned int metadata_flag:1; - /* - * Information telling us that the stream is closed in write, so - * we don't expect new indexes and we can read up to EOF. - */ - unsigned int close_write_flag:1; - /* - * If the streaming side closes a FD in use in the viewer side, - * it sets this flag to inform that it is a normal error. - */ - unsigned int abort_flag:1; -}; - -/* - * Internal structure to map a socket with the corresponding session. - * A hashtable indexed on the socket FD is used for the lookups. - */ -struct relay_command { - struct lttcomm_sock *sock; - struct relay_session *session; - struct cds_wfq_node node; - struct lttng_ht_node_ulong sock_n; - struct rcu_head rcu_node; - enum connection_type type; - unsigned int version_check_done:1; - /* protocol version to use for this session */ - uint32_t major; - uint32_t minor; - struct lttng_ht *ctf_traces_ht; /* indexed by path name */ - uint64_t session_id; -}; - -struct relay_local_data { - struct lttng_ht *sessions_ht; -}; - -extern char *opt_output_path; - -extern struct lttng_ht *relay_streams_ht; -extern struct lttng_ht *viewer_streams_ht; -extern struct lttng_ht *indexes_ht; - -extern const char *tracing_group_name; - -struct relay_stream *relay_stream_find_by_id(uint64_t stream_id); - -#endif /* LTTNG_RELAYD_H */