src/bin/lttng-relayd/index.hpp

   1 #ifndef _RELAY_INDEX_H
   2 #define _RELAY_INDEX_H
   3
   4 /*
   5  * Copyright (C) 2013 Julien Desfossez <jdesfossez@efficios.com>
   6  * Copyright (C) 2013 David Goulet <dgoulet@efficios.com>
   7  * Copyright (C) 2015 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   8  *
   9  * SPDX-License-Identifier: GPL-2.0-only
  10  *
  11  */
  12
  13 #include <common/hashtable/hashtable.hpp>
  14 #include <common/index/index.hpp>
  15
  16 #include <inttypes.h>
  17 #include <pthread.h>
  18
  19 struct relay_stream;
  20 struct relay_connection;
  21 struct lttcomm_relayd_index;
  22
  23 struct relay_index {
  24         /*
  25          * index lock nests inside stream lock.
  26          */
  27         struct urcu_ref ref; /* Reference from getters. */
  28         struct relay_stream *stream; /* Back ref to stream */
  29
  30         pthread_mutex_t lock;
  31         /*
  32          * index file on which to write the index data. May differ from
  33          * stream->index_file due to tracefile rotation.
  34          */
  35         struct lttng_index_file *index_file;
  36
  37         /* Index packet data. This is the data that is written on disk. */
  38         struct ctf_packet_index index_data;
  39         /* Data + padding size of this packet, filled by the data thread. */
  40         uint64_t total_size;
  41
  42         bool has_index_data;
  43         bool flushed;
  44         bool in_hash_table;
  45
  46         /*
  47          * Node within indexes_ht that corresponds to this struct
  48          * relay_index. Indexed by net_seq_num, which is unique for this
  49          * index across the stream.
  50          */
  51         struct lttng_ht_node_u64 index_n;
  52         struct rcu_head rcu_node; /* For call_rcu teardown. */
  53 };
  54
  55 struct relay_index *relay_index_get_by_id_or_create(struct relay_stream *stream,
  56                                                     uint64_t net_seq_num);
  57 void relay_index_put(struct relay_index *index);
  58 int relay_index_set_file(struct relay_index *index,
  59                          struct lttng_index_file *index_file,
  60                          uint64_t data_offset);
  61 int relay_index_set_data(struct relay_index *index, const struct ctf_packet_index *data);
  62 int relay_index_try_flush(struct relay_index *index);
  63
  64 void relay_index_close_all(struct relay_stream *stream);
  65 void relay_index_close_partial_fd(struct relay_stream *stream);
  66 uint64_t relay_index_find_last(struct relay_stream *stream);
  67 int relay_index_switch_all_files(struct relay_stream *stream);
  68 int relay_index_set_control_data(struct relay_index *index,
  69                                  const struct lttcomm_relayd_index *data,
  70                                  unsigned int minor_version);
  71
  72 #endif /* _RELAY_INDEX_H */