src/plugins/ctf/fs-src/fs.hpp

   1 /*
   2  * SPDX-License-Identifier: MIT
   3  *
   4  * Copyright 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com>
   5  * Copyright 2016 Philippe Proulx <pproulx@efficios.com>
   6  *
   7  * BabelTrace - CTF on File System Component
   8  */
   9
  10 #ifndef BABELTRACE_PLUGIN_CTF_FS_H
  11 #define BABELTRACE_PLUGIN_CTF_FS_H
  12
  13 #include <glib.h>
  14
  15 #include <babeltrace2/babeltrace.h>
  16
  17 #include "cpp-common/bt2c/glib-up.hpp"
  18 #include "cpp-common/bt2c/logging.hpp"
  19
  20 #include "data-stream-file.hpp"
  21 #include "plugins/ctf/common/src/metadata/tsdl/decoder.hpp"
  22
  23 extern bool ctf_fs_debug;
  24
  25 struct ctf_fs_file
  26 {
  27     explicit ctf_fs_file(const bt2c::Logger& parentLogger) :
  28         logger {parentLogger, "PLUGIN/SRC.CTF.FS/FILE"}
  29     {
  30     }
  31
  32     bt2c::Logger logger;
  33
  34     /* Owned by this */
  35     GString *path = nullptr;
  36
  37     /* Owned by this */
  38     FILE *fp = nullptr;
  39
  40     off_t size = 0;
  41 };
  42
  43 struct ctf_fs_metadata
  44 {
  45     /* Owned by this */
  46     ctf_metadata_decoder_up decoder;
  47
  48     /* Owned by this */
  49     bt_trace_class *trace_class = nullptr;
  50
  51     /* Weak (owned by `decoder` above) */
  52     struct ctf_trace_class *tc = nullptr;
  53
  54     /* Owned by this */
  55     char *text = nullptr;
  56
  57     int bo = 0;
  58 };
  59
  60 struct ctf_fs_trace_deleter
  61 {
  62     void operator()(ctf_fs_trace *) noexcept;
  63 };
  64
  65 struct ctf_fs_trace
  66 {
  67     using UP = std::unique_ptr<ctf_fs_trace, ctf_fs_trace_deleter>;
  68
  69     explicit ctf_fs_trace(const bt2c::Logger& parentLogger) :
  70         logger {parentLogger, "PLUGIN/SRC.CTF.FS/TRACE"}
  71     {
  72     }
  73
  74     bt2c::Logger logger;
  75
  76     /* Owned by this */
  77     struct ctf_fs_metadata *metadata = nullptr;
  78
  79     /* Owned by this */
  80     bt_trace *trace = nullptr;
  81
  82     std::vector<ctf_fs_ds_file_group::UP> ds_file_groups;
  83
  84     /* Owned by this */
  85     GString *path = nullptr;
  86
  87     /* Next automatic stream ID when not provided by packet header */
  88     uint64_t next_stream_id = 0;
  89 };
  90
  91 struct ctf_fs_port_data
  92 {
  93     using UP = std::unique_ptr<ctf_fs_port_data>;
  94
  95     /* Weak, belongs to ctf_fs_trace */
  96     struct ctf_fs_ds_file_group *ds_file_group = nullptr;
  97
  98     /* Weak */
  99     struct ctf_fs_component *ctf_fs = nullptr;
 100 };
 101
 102 struct ctf_fs_component_deleter
 103 {
 104     void operator()(ctf_fs_component *);
 105 };
 106
 107 struct ctf_fs_component
 108 {
 109     using UP = std::unique_ptr<ctf_fs_component, ctf_fs_component_deleter>;
 110
 111     explicit ctf_fs_component(const bt2c::Logger& parentLogger) noexcept :
 112         logger {parentLogger, "PLUGIN/SRC.CTF.FS/COMP"}
 113     {
 114     }
 115
 116     bt2c::Logger logger;
 117
 118     std::vector<ctf_fs_port_data::UP> port_data;
 119
 120     ctf_fs_trace::UP trace;
 121
 122     ctf::src::ClkClsCfg clkClsCfg;
 123 };
 124
 125 struct ctf_fs_msg_iter_data
 126 {
 127     explicit ctf_fs_msg_iter_data(bt_self_message_iterator *selfMsgIter) :
 128         self_msg_iter {selfMsgIter}, logger {bt2::SelfMessageIterator {self_msg_iter},
 129                                              "PLUGIN/SRC.CTF.FS/MSG-ITER"}
 130     {
 131     }
 132
 133     /* Weak */
 134     bt_self_message_iterator *self_msg_iter = nullptr;
 135
 136     bt2c::Logger logger;
 137
 138     /* Weak, belongs to ctf_fs_trace */
 139     struct ctf_fs_ds_file_group *ds_file_group = nullptr;
 140
 141     /* Owned by this */
 142     struct ctf_msg_iter *msg_iter = nullptr;
 143
 144     /*
 145      * Saved error.  If we hit an error in the _next method, but have some
 146      * messages ready to return, we save the error here and return it on
 147      * the next _next call.
 148      */
 149     bt_message_iterator_class_next_method_status next_saved_status =
 150         BT_MESSAGE_ITERATOR_CLASS_NEXT_METHOD_STATUS_OK;
 151     const struct bt_error *next_saved_error = nullptr;
 152
 153     struct ctf_fs_ds_group_medops_data *msg_iter_medops_data = nullptr;
 154 };
 155
 156 bt_component_class_initialize_method_status
 157 ctf_fs_init(bt_self_component_source *source, bt_self_component_source_configuration *config,
 158             const bt_value *params, void *init_method_data);
 159
 160 void ctf_fs_finalize(bt_self_component_source *component);
 161
 162 bt_component_class_query_method_status ctf_fs_query(bt_self_component_class_source *comp_class,
 163                                                     bt_private_query_executor *priv_query_exec,
 164                                                     const char *object, const bt_value *params,
 165                                                     void *method_data, const bt_value **result);
 166
 167 bt_message_iterator_class_initialize_method_status
 168 ctf_fs_iterator_init(bt_self_message_iterator *self_msg_iter,
 169                      bt_self_message_iterator_configuration *config,
 170                      bt_self_component_port_output *self_port);
 171
 172 void ctf_fs_iterator_finalize(bt_self_message_iterator *it);
 173
 174 bt_message_iterator_class_next_method_status
 175 ctf_fs_iterator_next(bt_self_message_iterator *iterator, bt_message_array_const msgs,
 176                      uint64_t capacity, uint64_t *count);
 177
 178 bt_message_iterator_class_seek_beginning_method_status
 179 ctf_fs_iterator_seek_beginning(bt_self_message_iterator *message_iterator);
 180
 181 /* Create and initialize a new, empty ctf_fs_component. */
 182
 183 ctf_fs_component::UP ctf_fs_component_create(const bt2c::Logger& parentLogger);
 184
 185 /*
 186  * Create one `struct ctf_fs_trace` from one trace, or multiple traces sharing
 187  * the same UUID.
 188  *
 189  * `paths_value` must be an array of strings,
 190  *
 191  * The created `struct ctf_fs_trace` is assigned to `ctf_fs->trace`.
 192  *
 193  * `self_comp` and `self_comp_class` are used for logging, only one of them
 194  * should be set.
 195  */
 196
 197 int ctf_fs_component_create_ctf_fs_trace(struct ctf_fs_component *ctf_fs,
 198                                          const bt_value *paths_value,
 199                                          const bt_value *trace_name_value,
 200                                          bt_self_component *selfComp);
 201
 202 /* Free `ctf_fs` and everything it owns. */
 203
 204 void ctf_fs_destroy(struct ctf_fs_component *ctf_fs);
 205
 206 /*
 207  * Read and validate parameters taken by the src.ctf.fs plugin.
 208  *
 209  *  - The mandatory `paths` parameter is returned in `*paths`.
 210  *  - The optional `clock-class-offset-s` and `clock-class-offset-ns`, if
 211  *    present, are recorded in the `ctf_fs` structure.
 212  *  - The optional `trace-name` parameter is returned in `*trace_name` if
 213  *    present, else `*trace_name` is set to NULL.
 214  *
 215  * `self_comp` and `self_comp_class` are used for logging, only one of them
 216  * should be set.
 217  *
 218  * Return true on success, false if any parameter didn't pass validation.
 219  */
 220
 221 bool read_src_fs_parameters(const bt_value *params, const bt_value **paths,
 222                             const bt_value **trace_name, struct ctf_fs_component *ctf_fs);
 223
 224 /*
 225  * Generate the port name to be used for a given data stream file group.
 226  */
 227
 228 bt2c::GCharUP ctf_fs_make_port_name(struct ctf_fs_ds_file_group *ds_file_group);
 229
 230 #endif /* BABELTRACE_PLUGIN_CTF_FS_H */