plugins/ctf/fs/fs.h

   1 #ifndef BABELTRACE_PLUGIN_CTF_FS_H
   2 #define BABELTRACE_PLUGIN_CTF_FS_H
   3
   4 /*
   5  * BabelTrace - CTF on File System Component
   6  *
   7  * Copyright 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com>
   8  * Copyright 2016 Philippe Proulx <pproulx@efficios.com>
   9  *
  10  * Author: Jérémie Galarneau <jeremie.galarneau@efficios.com>
  11  *
  12  * Permission is hereby granted, free of charge, to any person obtaining a copy
  13  * of this software and associated documentation files (the "Software"), to deal
  14  * in the Software without restriction, including without limitation the rights
  15  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  16  * copies of the Software, and to permit persons to whom the Software is
  17  * furnished to do so, subject to the following conditions:
  18  *
  19  * The above copyright notice and this permission notice shall be included in
  20  * all copies or substantial portions of the Software.
  21  *
  22  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  23  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  24  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  25  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  26  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  27  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  28  * SOFTWARE.
  29  */
  30
  31 #include <babeltrace/babeltrace-internal.h>
  32 #include <babeltrace/plugin/component.h>
  33
  34 #define CTF_FS_COMPONENT_NAME "fs"
  35 #define CTF_FS_COMPONENT_DESCRIPTION \
  36         "Component used to read a CTF trace located on a file system."
  37
  38 static bool ctf_fs_debug;
  39
  40 struct bt_notification_heap;
  41
  42 struct ctf_fs_file {
  43         struct ctf_fs_component *ctf_fs;
  44         GString *path;
  45         FILE *fp;
  46         off_t size;
  47 };
  48
  49 struct ctf_fs_metadata {
  50         struct bt_ctf_trace *trace;
  51         uint8_t uuid[16];
  52         bool is_uuid_set;
  53         int bo;
  54         char *text;
  55 };
  56
  57 struct ctf_fs_stream {
  58         struct ctf_fs_file *file;
  59         struct bt_ctf_stream *stream;
  60         /* FIXME There should be many and ctf_fs_stream should not own them. */
  61         struct bt_ctf_notif_iter *notif_iter;
  62         void *mmap_addr;
  63         /* Max length of chunk to mmap() when updating the current mapping. */
  64         size_t mmap_max_len;
  65         /* Length of the current mapping. */
  66         size_t mmap_len;
  67         /* Length of the current mapping which *exists* in the backing file. */
  68         size_t mmap_valid_len;
  69         /* Offset in the file where the current mapping starts. */
  70         off_t mmap_offset;
  71         /*
  72          * Offset, in the current mapping, of the address to return on the next
  73          * request.
  74          */
  75         off_t request_offset;
  76         bool end_reached;
  77 };
  78
  79 struct ctf_fs_iterator {
  80         struct bt_notification_heap *pending_notifications;
  81         struct bt_notification *current_notification;
  82         /*
  83          * struct ctf_fs_data_stream* which have not yet been associated to a
  84          * bt_ctf_stream. The association is performed on the first packet
  85          * read by the stream (since, at that point, we have read a packet
  86          * header).
  87          */
  88         GPtrArray *pending_streams;
  89         /* bt_ctf_stream -> ctf_fs_stream */
  90         GHashTable *stream_ht;
  91 };
  92
  93 struct ctf_fs_component_options {
  94         bool opt_dummy : 1;
  95 };
  96
  97 struct ctf_fs_component {
  98         GString *trace_path;
  99         FILE *error_fp;
 100         size_t page_size;
 101         struct ctf_fs_component_options options;
 102         struct ctf_fs_metadata *metadata;
 103 };
 104
 105 BT_HIDDEN
 106 enum bt_component_status ctf_fs_init(struct bt_component *source,
 107                 struct bt_value *params);
 108
 109 #endif /* BABELTRACE_PLUGIN_CTF_FS_H */