src/bin/lttng-sessiond/snapshot.hpp

   1 /*
   2  * Copyright (C) 2013 David Goulet <dgoulet@efficios.com>
   3  *
   4  * SPDX-License-Identifier: GPL-2.0-only
   5  *
   6  */
   7
   8 #ifndef SNAPSHOT_H
   9 #define SNAPSHOT_H
  10
  11 #include "consumer.hpp"
  12
  13 #include <common/common.hpp>
  14 #include <common/hashtable/hashtable.hpp>
  15 #include <common/uri.hpp>
  16
  17 #include <limits.h>
  18 #include <stdint.h>
  19
  20 struct consumer_output;
  21
  22 struct snapshot_output {
  23         uint32_t id;
  24         uint64_t max_size;
  25         /* Number of snapshot taken with that output. */
  26         uint64_t nb_snapshot;
  27         char name[NAME_MAX];
  28         struct consumer_output *consumer;
  29         int kernel_sockets_copied;
  30         int ust_sockets_copied;
  31         /*
  32          * Contains the string with "<date>-<time>" for when the snapshot command
  33          * is triggered. This is to make sure every streams will use the same time
  34          * for the directory output.
  35          */
  36         char datetime[16];
  37
  38         /* Indexed by ID. */
  39         struct lttng_ht_node_ulong node;
  40 };
  41
  42 struct snapshot {
  43         unsigned long next_output_id;
  44         size_t nb_output;
  45         /*
  46          * Number of snapshot taken for that object. This value is used with a
  47          * temporary output of a snapshot record.
  48          */
  49         uint64_t nb_snapshot;
  50         struct lttng_ht *output_ht;
  51 };
  52
  53 /* Snapshot object. */
  54 struct snapshot *snapshot_alloc();
  55 void snapshot_destroy(struct snapshot *obj);
  56 int snapshot_init(struct snapshot *obj);
  57 void snapshot_delete_output(struct snapshot *snapshot, struct snapshot_output *output);
  58 void snapshot_add_output(struct snapshot *snapshot, struct snapshot_output *output);
  59
  60 /* Snapshot output object. */
  61 struct snapshot_output *snapshot_output_alloc();
  62 void snapshot_output_destroy(struct snapshot_output *obj);
  63
  64 struct snapshot_output *snapshot_find_output_by_id(uint32_t id, struct snapshot *snapshot);
  65 struct snapshot_output *snapshot_find_output_by_name(const char *name, struct snapshot *snapshot);
  66
  67 #endif /* SNAPSHOT_H */