src/plugins/ctf/fs-src/metadata.c

   1 /*
   2  * Copyright 2016 - Philippe Proulx <pproulx@efficios.com>
   3  * Copyright 2010-2011 - EfficiOS Inc. and Linux Foundation
   4  *
   5  * Some functions are based on older functions written by Mathieu Desnoyers.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a copy
   8  * of this software and associated documentation files (the "Software"), to deal
   9  * in the Software without restriction, including without limitation the rights
  10  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  11  * copies of the Software, and to permit persons to whom the Software is
  12  * furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included in
  15  * all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  20  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  22  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  23  * SOFTWARE.
  24  */
  25
  26 #include <stdio.h>
  27 #include <stdint.h>
  28 #include <stdlib.h>
  29 #include <stdbool.h>
  30 #include "common/assert.h"
  31 #include <glib.h>
  32 #include "compat/uuid.h"
  33 #include "compat/memstream.h"
  34 #include <babeltrace2/babeltrace.h>
  35
  36 #include "fs.h"
  37 #include "file.h"
  38 #include "metadata.h"
  39 #include "../common/metadata/decoder.h"
  40
  41 #define BT_LOG_TAG "PLUGIN-CTF-FS-METADATA-SRC"
  42 #include "logging.h"
  43
  44 BT_HIDDEN
  45 FILE *ctf_fs_metadata_open_file(const char *trace_path)
  46 {
  47         GString *metadata_path;
  48         FILE *fp = NULL;
  49
  50         metadata_path = g_string_new(trace_path);
  51         if (!metadata_path) {
  52                 goto end;
  53         }
  54
  55         g_string_append(metadata_path, G_DIR_SEPARATOR_S CTF_FS_METADATA_FILENAME);
  56         fp = fopen(metadata_path->str, "rb");
  57         g_string_free(metadata_path, TRUE);
  58 end:
  59         return fp;
  60 }
  61
  62 static struct ctf_fs_file *get_file(const char *trace_path)
  63 {
  64         struct ctf_fs_file *file = ctf_fs_file_create();
  65
  66         if (!file) {
  67                 goto error;
  68         }
  69
  70         g_string_append(file->path, trace_path);
  71         g_string_append(file->path, G_DIR_SEPARATOR_S CTF_FS_METADATA_FILENAME);
  72
  73         if (ctf_fs_file_open(file, "rb")) {
  74                 goto error;
  75         }
  76
  77         goto end;
  78
  79 error:
  80         if (file) {
  81                 ctf_fs_file_destroy(file);
  82                 file = NULL;
  83         }
  84
  85 end:
  86         return file;
  87 }
  88
  89 BT_HIDDEN
  90 int ctf_fs_metadata_set_trace_class(
  91                 bt_self_component_source *self_comp,
  92                 struct ctf_fs_trace *ctf_fs_trace,
  93                 struct ctf_fs_metadata_config *config)
  94 {
  95         int ret = 0;
  96         struct ctf_fs_file *file = NULL;
  97         struct ctf_metadata_decoder_config decoder_config = {
  98                 .clock_class_offset_s = config ? config->clock_class_offset_s : 0,
  99                 .clock_class_offset_ns = config ? config->clock_class_offset_ns : 0,
 100         };
 101
 102         file = get_file(ctf_fs_trace->path->str);
 103         if (!file) {
 104                 BT_LOGE("Cannot create metadata file object");
 105                 ret = -1;
 106                 goto end;
 107         }
 108
 109         ctf_fs_trace->metadata->decoder = ctf_metadata_decoder_create(self_comp,
 110                 config ? &decoder_config : NULL);
 111         if (!ctf_fs_trace->metadata->decoder) {
 112                 BT_LOGE("Cannot create metadata decoder object");
 113                 ret = -1;
 114                 goto end;
 115         }
 116
 117         ret = ctf_metadata_decoder_decode(ctf_fs_trace->metadata->decoder,
 118                 file->fp);
 119         if (ret) {
 120                 BT_LOGE("Cannot decode metadata file");
 121                 goto end;
 122         }
 123
 124         ctf_fs_trace->metadata->trace_class =
 125                 ctf_metadata_decoder_get_ir_trace_class(
 126                         ctf_fs_trace->metadata->decoder);
 127         BT_ASSERT(!self_comp || ctf_fs_trace->metadata->trace_class);
 128         ctf_fs_trace->metadata->tc =
 129                 ctf_metadata_decoder_borrow_ctf_trace_class(
 130                         ctf_fs_trace->metadata->decoder);
 131         BT_ASSERT(ctf_fs_trace->metadata->tc);
 132
 133 end:
 134         ctf_fs_file_destroy(file);
 135         return ret;
 136 }
 137
 138 BT_HIDDEN
 139 int ctf_fs_metadata_init(struct ctf_fs_metadata *metadata)
 140 {
 141         /* Nothing to initialize for the moment. */
 142         return 0;
 143 }
 144
 145 BT_HIDDEN
 146 void ctf_fs_metadata_fini(struct ctf_fs_metadata *metadata)
 147 {
 148         if (metadata->text) {
 149                 free(metadata->text);
 150         }
 151
 152         if (metadata->trace_class) {
 153                 BT_TRACE_CLASS_PUT_REF_AND_RESET(metadata->trace_class);
 154         }
 155
 156         if (metadata->decoder) {
 157                 ctf_metadata_decoder_destroy(metadata->decoder);
 158         }
 159 }