lib: add internal object pool API and use it; adapt plugins/tests
[babeltrace.git] / plugins / ctf / fs-src / fs.c
index 6fc53e3c30da2f47f917e09c735defdbdd03b2eb..07b4c049fc28bbd0ca155f6ab239a1921197f965 100644 (file)
  * SOFTWARE.
  */
 
-#include <babeltrace/ctf-ir/packet.h>
-#include <babeltrace/ctf-ir/clock-class.h>
-#include <babeltrace/graph/private-port.h>
-#include <babeltrace/graph/private-component.h>
-#include <babeltrace/graph/private-component-source.h>
-#include <babeltrace/graph/private-notification-iterator.h>
-#include <babeltrace/graph/component.h>
-#include <babeltrace/graph/notification-iterator.h>
-#include <babeltrace/graph/clock-class-priority-map.h>
+#include <babeltrace/common-internal.h>
+#include <babeltrace/babeltrace.h>
 #include <plugins-common.h>
 #include <glib.h>
-#include <assert.h>
+#include <babeltrace/assert-internal.h>
+#include <inttypes.h>
 #include <stdbool.h>
-#include <unistd.h>
 #include "fs.h"
 #include "metadata.h"
-#include "data-stream.h"
+#include "data-stream-file.h"
 #include "file.h"
 #include "../common/metadata/decoder.h"
+#include "../common/notif-iter/notif-iter.h"
+#include "../common/utils/utils.h"
+#include "query.h"
 
-#define PRINT_ERR_STREAM       ctf_fs->error_fp
-#define PRINT_PREFIX           "ctf-fs"
-#define PRINT_DBG_CHECK                ctf_fs_debug
-#include "../print.h"
-#define METADATA_TEXT_SIG      "/* CTF 1.8"
+#define BT_LOG_TAG "PLUGIN-CTF-FS-SRC"
+#include "logging.h"
 
-BT_HIDDEN
-bool ctf_fs_debug;
+static
+int notif_iter_data_set_current_ds_file(struct ctf_fs_notif_iter_data *notif_iter_data)
+{
+       struct ctf_fs_ds_file_info *ds_file_info;
+       int ret = 0;
+
+       BT_ASSERT(notif_iter_data->ds_file_info_index <
+               notif_iter_data->ds_file_group->ds_file_infos->len);
+       ds_file_info = g_ptr_array_index(
+               notif_iter_data->ds_file_group->ds_file_infos,
+               notif_iter_data->ds_file_info_index);
+
+       ctf_fs_ds_file_destroy(notif_iter_data->ds_file);
+       notif_iter_data->ds_file = ctf_fs_ds_file_create(
+               notif_iter_data->ds_file_group->ctf_fs_trace,
+               notif_iter_data->notif_iter,
+               notif_iter_data->ds_file_group->stream,
+               ds_file_info->path->str);
+       if (!notif_iter_data->ds_file) {
+               ret = -1;
+       }
 
-struct bt_notification_iterator_next_return ctf_fs_iterator_next(
-               struct bt_private_notification_iterator *iterator)
+       return ret;
+}
+
+static
+void ctf_fs_notif_iter_data_destroy(
+               struct ctf_fs_notif_iter_data *notif_iter_data)
 {
-       struct ctf_fs_stream *fs_stream =
-               bt_private_notification_iterator_get_user_data(iterator);
+       if (!notif_iter_data) {
+               return;
+       }
+
+       ctf_fs_ds_file_destroy(notif_iter_data->ds_file);
+
+       if (notif_iter_data->notif_iter) {
+               bt_notif_iter_destroy(notif_iter_data->notif_iter);
+       }
+
+       g_free(notif_iter_data);
+}
+
+struct bt_notification_iterator_next_method_return ctf_fs_iterator_next(
+               struct bt_private_connection_private_notification_iterator *iterator)
+{
+       struct bt_notification_iterator_next_method_return next_ret;
+       struct ctf_fs_notif_iter_data *notif_iter_data =
+               bt_private_connection_private_notification_iterator_get_user_data(iterator);
+       int ret;
+
+       BT_ASSERT(notif_iter_data->ds_file);
+       next_ret = ctf_fs_ds_file_next(notif_iter_data->ds_file);
+
+       if (next_ret.status == BT_NOTIFICATION_ITERATOR_STATUS_OK &&
+                       bt_notification_get_type(next_ret.notification) ==
+                       BT_NOTIFICATION_TYPE_STREAM_BEGIN) {
+               if (notif_iter_data->skip_stream_begin_notifs) {
+                       /*
+                        * We already emitted a
+                        * BT_NOTIFICATION_TYPE_STREAM_BEGIN
+                        * notification: skip this one, get a new one.
+                        */
+                       BT_PUT(next_ret.notification);
+                       next_ret = ctf_fs_ds_file_next(notif_iter_data->ds_file);
+                       BT_ASSERT(next_ret.status != BT_NOTIFICATION_ITERATOR_STATUS_END);
+                       goto end;
+               } else {
+                       /*
+                        * First BT_NOTIFICATION_TYPE_STREAM_BEGIN
+                        * notification: skip all following.
+                        */
+                       notif_iter_data->skip_stream_begin_notifs = true;
+                       goto end;
+               }
+       }
+
+       if (next_ret.status == BT_NOTIFICATION_ITERATOR_STATUS_OK &&
+                       bt_notification_get_type(next_ret.notification) ==
+                       BT_NOTIFICATION_TYPE_STREAM_END) {
+               notif_iter_data->ds_file_info_index++;
+
+               if (notif_iter_data->ds_file_info_index ==
+                               notif_iter_data->ds_file_group->ds_file_infos->len) {
+                       /*
+                        * No more stream files to read: we reached the
+                        * real end. Emit this
+                        * BT_NOTIFICATION_TYPE_STREAM_END notification.
+                        * The next time ctf_fs_iterator_next() is
+                        * called for this notification iterator,
+                        * ctf_fs_ds_file_next() will return
+                        * BT_NOTIFICATION_ITERATOR_STATUS_END().
+                        */
+                       goto end;
+               }
+
+               BT_PUT(next_ret.notification);
+               bt_notif_iter_reset(notif_iter_data->notif_iter);
+
+               /*
+                * Open and start reading the next stream file within
+                * our stream file group.
+                */
+               ret = notif_iter_data_set_current_ds_file(notif_iter_data);
+               if (ret) {
+                       next_ret.status = BT_NOTIFICATION_ITERATOR_STATUS_ERROR;
+                       goto end;
+               }
+
+               next_ret = ctf_fs_ds_file_next(notif_iter_data->ds_file);
+
+               /*
+                * If we get a notification, we expect to get a
+                * BT_NOTIFICATION_TYPE_STREAM_BEGIN notification
+                * because the iterator's state machine emits one before
+                * even requesting the first block of data from the
+                * medium. Skip this notification because we're not
+                * really starting a new stream here, and try getting a
+                * new notification (which, if it works, is a
+                * BT_NOTIFICATION_TYPE_PACKET_BEGIN one). We're sure to
+                * get at least one pair of
+                * BT_NOTIFICATION_TYPE_PACKET_BEGIN and
+                * BT_NOTIFICATION_TYPE_PACKET_END notifications in the
+                * case of a single, empty packet. We know there's at
+                * least one packet because the stream file group does
+                * not contain empty stream files.
+                */
+               BT_ASSERT(notif_iter_data->skip_stream_begin_notifs);
+
+               if (next_ret.status == BT_NOTIFICATION_ITERATOR_STATUS_OK) {
+                       BT_ASSERT(bt_notification_get_type(next_ret.notification) ==
+                               BT_NOTIFICATION_TYPE_STREAM_BEGIN);
+                       BT_PUT(next_ret.notification);
+                       next_ret = ctf_fs_ds_file_next(notif_iter_data->ds_file);
+                       BT_ASSERT(next_ret.status != BT_NOTIFICATION_ITERATOR_STATUS_END);
+               }
+       }
 
-       return ctf_fs_stream_next(fs_stream);
+end:
+       return next_ret;
 }
 
-void ctf_fs_iterator_finalize(struct bt_private_notification_iterator *it)
+void ctf_fs_iterator_finalize(struct bt_private_connection_private_notification_iterator *it)
 {
-       void *ctf_fs_stream =
-               bt_private_notification_iterator_get_user_data(it);
+       void *notif_iter_data =
+               bt_private_connection_private_notification_iterator_get_user_data(it);
 
-       ctf_fs_stream_destroy(ctf_fs_stream);
+       ctf_fs_notif_iter_data_destroy(notif_iter_data);
 }
 
 enum bt_notification_iterator_status ctf_fs_iterator_init(
-               struct bt_private_notification_iterator *it,
+               struct bt_private_connection_private_notification_iterator *it,
                struct bt_private_port *port)
 {
-       struct ctf_fs_stream *ctf_fs_stream = NULL;
        struct ctf_fs_port_data *port_data;
+       struct ctf_fs_notif_iter_data *notif_iter_data = NULL;
        enum bt_notification_iterator_status ret =
                BT_NOTIFICATION_ITERATOR_STATUS_OK;
+       int iret;
 
        port_data = bt_private_port_get_user_data(port);
        if (!port_data) {
@@ -86,29 +209,42 @@ enum bt_notification_iterator_status ctf_fs_iterator_init(
                goto error;
        }
 
-       ctf_fs_stream = ctf_fs_stream_create(port_data->ctf_fs_trace,
-               port_data->path->str);
-       if (!ctf_fs_stream) {
+       notif_iter_data = g_new0(struct ctf_fs_notif_iter_data, 1);
+       if (!notif_iter_data) {
+               ret = BT_NOTIFICATION_ITERATOR_STATUS_NOMEM;
                goto error;
        }
 
-       ret = bt_private_notification_iterator_set_user_data(it, ctf_fs_stream);
-       if (ret) {
+       notif_iter_data->notif_iter = bt_notif_iter_create(
+               port_data->ds_file_group->ctf_fs_trace->metadata->trace,
+               bt_common_get_page_size() * 8,
+               ctf_fs_ds_file_medops, NULL);
+       if (!notif_iter_data->notif_iter) {
+               BT_LOGE_STR("Cannot create a CTF notification iterator.");
+               ret = BT_NOTIFICATION_ITERATOR_STATUS_NOMEM;
                goto error;
        }
 
-       ctf_fs_stream = NULL;
+       notif_iter_data->ds_file_group = port_data->ds_file_group;
+       iret = notif_iter_data_set_current_ds_file(notif_iter_data);
+       if (iret) {
+               ret = BT_NOTIFICATION_ITERATOR_STATUS_ERROR;
+               goto error;
+       }
+
+       ret = bt_private_connection_private_notification_iterator_set_user_data(it, notif_iter_data);
+       if (ret != BT_NOTIFICATION_ITERATOR_STATUS_OK) {
+               goto error;
+       }
+
+       notif_iter_data = NULL;
        goto end;
 
 error:
-       (void) bt_private_notification_iterator_set_user_data(it, NULL);
-
-       if (ret == BT_NOTIFICATION_ITERATOR_STATUS_OK) {
-               ret = BT_NOTIFICATION_ITERATOR_STATUS_ERROR;
-       }
+       (void) bt_private_connection_private_notification_iterator_set_user_data(it, NULL);
 
 end:
-       ctf_fs_stream_destroy(ctf_fs_stream);
+       ctf_fs_notif_iter_data_destroy(notif_iter_data);
        return ret;
 }
 
@@ -130,15 +266,17 @@ void ctf_fs_destroy(struct ctf_fs_component *ctf_fs)
        g_free(ctf_fs);
 }
 
-static
-void ctf_fs_trace_destroy(void *data)
+BT_HIDDEN
+void ctf_fs_trace_destroy(struct ctf_fs_trace *ctf_fs_trace)
 {
-       struct ctf_fs_trace *ctf_fs_trace = data;
-
        if (!ctf_fs_trace) {
                return;
        }
 
+       if (ctf_fs_trace->ds_file_groups) {
+               g_ptr_array_free(ctf_fs_trace->ds_file_groups, TRUE);
+       }
+
        if (ctf_fs_trace->path) {
                g_string_free(ctf_fs_trace->path, TRUE);
        }
@@ -156,6 +294,13 @@ void ctf_fs_trace_destroy(void *data)
        g_free(ctf_fs_trace);
 }
 
+static
+void ctf_fs_trace_destroy_notifier(void *data)
+{
+       struct ctf_fs_trace *trace = data;
+       ctf_fs_trace_destroy(trace);
+}
+
 void ctf_fs_finalize(struct bt_private_component *component)
 {
        void *data = bt_private_component_get_user_data(component);
@@ -171,31 +316,49 @@ void port_data_destroy(void *data) {
                return;
        }
 
-       if (port_data->path) {
-               g_string_free(port_data->path, TRUE);
+       g_free(port_data);
+}
+
+static
+GString *get_stream_instance_unique_name(
+               struct ctf_fs_ds_file_group *ds_file_group)
+{
+       GString *name;
+       struct ctf_fs_ds_file_info *ds_file_info;
+
+       name = g_string_new(NULL);
+       if (!name) {
+               goto end;
        }
 
-       g_free(port_data);
+       /*
+        * If there's more than one stream file in the stream file
+        * group, the first (earliest) stream file's path is used as
+        * the stream's unique name.
+        */
+       BT_ASSERT(ds_file_group->ds_file_infos->len > 0);
+       ds_file_info = g_ptr_array_index(ds_file_group->ds_file_infos, 0);
+       g_string_assign(name, ds_file_info->path->str);
+
+end:
+       return name;
 }
 
 static
-int create_one_port_for_trace(struct ctf_fs_trace *ctf_fs_trace,
-               const char *stream_path)
+int create_one_port_for_trace(struct ctf_fs_component *ctf_fs,
+               struct ctf_fs_trace *ctf_fs_trace,
+               struct ctf_fs_ds_file_group *ds_file_group)
 {
        int ret = 0;
-       struct bt_private_port *port = NULL;
        struct ctf_fs_port_data *port_data = NULL;
        GString *port_name = NULL;
-       struct ctf_fs_component *ctf_fs = ctf_fs_trace->ctf_fs;
 
-       port_name = g_string_new(NULL);
+       port_name = get_stream_instance_unique_name(ds_file_group);
        if (!port_name) {
                goto error;
        }
 
-       /* Assign the name for the new output port */
-       g_string_printf(port_name, "%s", stream_path);
-       PDBG("Creating one port named `%s`\n", port_name->str);
+       BT_LOGD("Creating one port named `%s`", port_name->str);
 
        /* Create output port for this file */
        port_data = g_new0(struct ctf_fs_port_data, 1);
@@ -203,15 +366,10 @@ int create_one_port_for_trace(struct ctf_fs_trace *ctf_fs_trace,
                goto error;
        }
 
-       port_data->ctf_fs_trace = ctf_fs_trace;
-       port_data->path = g_string_new(stream_path);
-       if (!port_data->path) {
-               goto error;
-       }
-
-       port = bt_private_component_source_add_output_private_port(
-               ctf_fs->priv_comp, port_name->str, port_data);
-       if (!port) {
+       port_data->ds_file_group = ds_file_group;
+       ret = bt_private_component_source_add_output_private_port(
+               ctf_fs->priv_comp, port_name->str, port_data, NULL);
+       if (ret) {
                goto error;
        }
 
@@ -227,86 +385,519 @@ end:
                g_string_free(port_name, TRUE);
        }
 
-       bt_put(port);
        port_data_destroy(port_data);
        return ret;
 }
 
 static
-int create_ports_for_trace(struct ctf_fs_trace *ctf_fs_trace)
+int create_ports_for_trace(struct ctf_fs_component *ctf_fs,
+               struct ctf_fs_trace *ctf_fs_trace)
+{
+       int ret = 0;
+       size_t i;
+
+       /* Create one output port for each stream file group */
+       for (i = 0; i < ctf_fs_trace->ds_file_groups->len; i++) {
+               struct ctf_fs_ds_file_group *ds_file_group =
+                       g_ptr_array_index(ctf_fs_trace->ds_file_groups, i);
+
+               ret = create_one_port_for_trace(ctf_fs, ctf_fs_trace,
+                       ds_file_group);
+               if (ret) {
+                       BT_LOGE("Cannot create output port.");
+                       goto end;
+               }
+       }
+
+end:
+       return ret;
+}
+
+static
+uint64_t get_packet_header_stream_instance_id(struct ctf_fs_trace *ctf_fs_trace,
+               struct bt_field *packet_header_field)
+{
+       struct bt_field *stream_instance_id_field = NULL;
+       uint64_t stream_instance_id = -1ULL;
+       int ret;
+
+       if (!packet_header_field) {
+               goto end;
+       }
+
+       stream_instance_id_field = bt_field_structure_borrow_field_by_name(
+               packet_header_field, "stream_instance_id");
+       if (!stream_instance_id_field) {
+               goto end;
+       }
+
+       ret = bt_field_integer_unsigned_get_value(stream_instance_id_field,
+               &stream_instance_id);
+       if (ret) {
+               stream_instance_id = -1ULL;
+               goto end;
+       }
+
+end:
+       return stream_instance_id;
+}
+
+uint64_t get_packet_context_timestamp_begin_ns(
+               struct ctf_fs_trace *ctf_fs_trace,
+               struct bt_field *packet_context_field)
+{
+       int ret;
+       struct bt_field *timestamp_begin_field = NULL;
+       struct bt_field_type *timestamp_begin_ft = NULL;
+       uint64_t timestamp_begin_raw_value = -1ULL;
+       uint64_t timestamp_begin_ns = -1ULL;
+       int64_t timestamp_begin_ns_signed;
+       struct bt_clock_class *timestamp_begin_clock_class = NULL;
+
+       if (!packet_context_field) {
+               goto end;
+       }
+
+       timestamp_begin_field = bt_field_structure_borrow_field_by_name(
+               packet_context_field, "timestamp_begin");
+       if (!timestamp_begin_field) {
+               goto end;
+       }
+
+       timestamp_begin_ft = bt_field_borrow_type(timestamp_begin_field);
+       BT_ASSERT(timestamp_begin_ft);
+       timestamp_begin_clock_class =
+               bt_field_type_integer_borrow_mapped_clock_class(timestamp_begin_ft);
+       if (!timestamp_begin_clock_class) {
+               goto end;
+       }
+
+       ret = bt_field_integer_unsigned_get_value(timestamp_begin_field,
+               &timestamp_begin_raw_value);
+       if (ret) {
+               goto end;
+       }
+
+       ret = bt_clock_class_cycles_to_ns(timestamp_begin_clock_class,
+               timestamp_begin_raw_value, &timestamp_begin_ns_signed);
+       if (ret) {
+               goto end;
+       }
+
+       timestamp_begin_ns = (uint64_t) timestamp_begin_ns_signed;
+
+end:
+       return timestamp_begin_ns;
+}
+
+static
+void ctf_fs_ds_file_info_destroy(struct ctf_fs_ds_file_info *ds_file_info)
+{
+       if (!ds_file_info) {
+               return;
+       }
+
+       if (ds_file_info->path) {
+               g_string_free(ds_file_info->path, TRUE);
+       }
+
+       ctf_fs_ds_index_destroy(ds_file_info->index);
+       g_free(ds_file_info);
+}
+
+static
+struct ctf_fs_ds_file_info *ctf_fs_ds_file_info_create(const char *path,
+               uint64_t begin_ns, struct ctf_fs_ds_index *index)
+{
+       struct ctf_fs_ds_file_info *ds_file_info;
+
+       ds_file_info = g_new0(struct ctf_fs_ds_file_info, 1);
+       if (!ds_file_info) {
+               goto end;
+       }
+
+       ds_file_info->path = g_string_new(path);
+       if (!ds_file_info->path) {
+               ctf_fs_ds_file_info_destroy(ds_file_info);
+               ds_file_info = NULL;
+               goto end;
+       }
+
+       ds_file_info->begin_ns = begin_ns;
+       ds_file_info->index = index;
+       index = NULL;
+
+end:
+       ctf_fs_ds_index_destroy(index);
+       return ds_file_info;
+}
+
+static
+void ctf_fs_ds_file_group_destroy(struct ctf_fs_ds_file_group *ds_file_group)
+{
+       if (!ds_file_group) {
+               return;
+       }
+
+       if (ds_file_group->ds_file_infos) {
+               g_ptr_array_free(ds_file_group->ds_file_infos, TRUE);
+       }
+
+       bt_put(ds_file_group->stream);
+       bt_put(ds_file_group->stream_class);
+       g_free(ds_file_group);
+}
+
+static
+struct ctf_fs_ds_file_group *ctf_fs_ds_file_group_create(
+               struct ctf_fs_trace *ctf_fs_trace,
+               struct bt_stream_class *stream_class,
+               uint64_t stream_instance_id)
+{
+       struct ctf_fs_ds_file_group *ds_file_group;
+
+       ds_file_group = g_new0(struct ctf_fs_ds_file_group, 1);
+       if (!ds_file_group) {
+               goto error;
+       }
+
+       ds_file_group->ds_file_infos = g_ptr_array_new_with_free_func(
+               (GDestroyNotify) ctf_fs_ds_file_info_destroy);
+       if (!ds_file_group->ds_file_infos) {
+               goto error;
+       }
+
+       ds_file_group->stream_id = stream_instance_id;
+       BT_ASSERT(stream_class);
+       ds_file_group->stream_class = bt_get(stream_class);
+       ds_file_group->ctf_fs_trace = ctf_fs_trace;
+       goto end;
+
+error:
+       ctf_fs_ds_file_group_destroy(ds_file_group);
+       ds_file_group = NULL;
+
+end:
+       return ds_file_group;
+}
+
+/* Replace by g_ptr_array_insert when we depend on glib >= 2.40. */
+static
+void array_insert(GPtrArray *array, gpointer element, size_t pos)
+{
+       size_t original_array_len = array->len;
+
+       /* Allocate an unused element at the end of the array. */
+       g_ptr_array_add(array, NULL);
+
+       /* If we are not inserting at the end, move the elements by one. */
+       if (pos < original_array_len) {
+               memmove(&(array->pdata[pos + 1]),
+                       &(array->pdata[pos]),
+                       (original_array_len - pos) * sizeof(gpointer));
+       }
+
+       /* Insert the value and bump the array len */
+       array->pdata[pos] = element;
+}
+
+static
+int ctf_fs_ds_file_group_add_ds_file_info(
+               struct ctf_fs_ds_file_group *ds_file_group,
+               const char *path, uint64_t begin_ns,
+               struct ctf_fs_ds_index *index)
+{
+       struct ctf_fs_ds_file_info *ds_file_info;
+       gint i = 0;
+       int ret = 0;
+
+       /* Onwership of index is transferred. */
+       ds_file_info = ctf_fs_ds_file_info_create(path, begin_ns, index);
+       index = NULL;
+       if (!ds_file_info) {
+               goto error;
+       }
+
+       /* Find a spot to insert this one */
+       for (i = 0; i < ds_file_group->ds_file_infos->len; i++) {
+               struct ctf_fs_ds_file_info *other_ds_file_info =
+                       g_ptr_array_index(ds_file_group->ds_file_infos, i);
+
+               if (begin_ns < other_ds_file_info->begin_ns) {
+                       break;
+               }
+       }
+
+       array_insert(ds_file_group->ds_file_infos, ds_file_info, i);
+       ds_file_info = NULL;
+       goto end;
+
+error:
+       ctf_fs_ds_file_info_destroy(ds_file_info);
+       ctf_fs_ds_index_destroy(index);
+       ret = -1;
+end:
+       return ret;
+}
+
+static
+int add_ds_file_to_ds_file_group(struct ctf_fs_trace *ctf_fs_trace,
+               const char *path)
+{
+       struct bt_field *packet_header_field = NULL;
+       struct bt_field *packet_context_field = NULL;
+       struct bt_stream_class *stream_class = NULL;
+       uint64_t stream_instance_id = -1ULL;
+       uint64_t begin_ns = -1ULL;
+       struct ctf_fs_ds_file_group *ds_file_group = NULL;
+       bool add_group = false;
+       int ret;
+       size_t i;
+       struct ctf_fs_ds_file *ds_file = NULL;
+       struct ctf_fs_ds_index *index = NULL;
+       struct bt_notif_iter *notif_iter = NULL;
+
+       notif_iter = bt_notif_iter_create(ctf_fs_trace->metadata->trace,
+               bt_common_get_page_size() * 8, ctf_fs_ds_file_medops, NULL);
+       if (!notif_iter) {
+               BT_LOGE_STR("Cannot create a CTF notification iterator.");
+               goto error;
+       }
+
+       ds_file = ctf_fs_ds_file_create(ctf_fs_trace, notif_iter, NULL, path);
+       if (!ds_file) {
+               goto error;
+       }
+
+       ret = ctf_fs_ds_file_borrow_packet_header_context_fields(ds_file,
+               &packet_header_field, &packet_context_field);
+       if (ret) {
+               BT_LOGE("Cannot get stream file's first packet's header and context fields (`%s`).",
+                       path);
+               goto error;
+       }
+
+       stream_instance_id = get_packet_header_stream_instance_id(ctf_fs_trace,
+               packet_header_field);
+       begin_ns = get_packet_context_timestamp_begin_ns(ctf_fs_trace,
+               packet_context_field);
+       stream_class = ctf_utils_borrow_stream_class_from_packet_header(
+               ctf_fs_trace->metadata->trace, packet_header_field);
+       if (!stream_class) {
+               goto error;
+       }
+
+       index = ctf_fs_ds_file_build_index(ds_file);
+       if (!index) {
+               BT_LOGW("Failed to index CTF stream file \'%s\'",
+                       ds_file->file->path->str);
+       }
+
+       if (begin_ns == -1ULL) {
+               /*
+                * No beggining timestamp to sort the stream files
+                * within a stream file group, so consider that this
+                * file must be the only one within its group.
+                */
+               stream_instance_id = -1ULL;
+       }
+
+       if (stream_instance_id == -1ULL) {
+               /*
+                * No stream instance ID or no beginning timestamp:
+                * create a unique stream file group for this stream
+                * file because, even if there's a stream instance ID,
+                * there's no timestamp to order the file within its
+                * group.
+                */
+               ds_file_group = ctf_fs_ds_file_group_create(ctf_fs_trace,
+                       stream_class, stream_instance_id);
+               if (!ds_file_group) {
+                       goto error;
+               }
+
+               ret = ctf_fs_ds_file_group_add_ds_file_info(ds_file_group,
+                       path, begin_ns, index);
+               /* Ownership of index is transferred. */
+               index = NULL;
+               if (ret) {
+                       goto error;
+               }
+
+               add_group = true;
+               goto end;
+       }
+
+       BT_ASSERT(stream_instance_id != -1ULL);
+       BT_ASSERT(begin_ns != -1ULL);
+
+       /* Find an existing stream file group with this ID */
+       for (i = 0; i < ctf_fs_trace->ds_file_groups->len; i++) {
+               ds_file_group = g_ptr_array_index(
+                       ctf_fs_trace->ds_file_groups, i);
+
+               if (ds_file_group->stream_class == stream_class &&
+                               ds_file_group->stream_id ==
+                               stream_instance_id) {
+                       break;
+               }
+
+               ds_file_group = NULL;
+       }
+
+       if (!ds_file_group) {
+               ds_file_group = ctf_fs_ds_file_group_create(ctf_fs_trace,
+                       stream_class, stream_instance_id);
+               if (!ds_file_group) {
+                       goto error;
+               }
+
+               add_group = true;
+       }
+
+       ret = ctf_fs_ds_file_group_add_ds_file_info(ds_file_group, path,
+               begin_ns, index);
+       index = NULL;
+       if (ret) {
+               goto error;
+       }
+
+       goto end;
+
+error:
+       ctf_fs_ds_file_group_destroy(ds_file_group);
+       ret = -1;
+
+end:
+       if (add_group && ds_file_group) {
+               g_ptr_array_add(ctf_fs_trace->ds_file_groups, ds_file_group);
+       }
+
+       ctf_fs_ds_file_destroy(ds_file);
+
+       if (notif_iter) {
+               bt_notif_iter_destroy(notif_iter);
+       }
+
+       ctf_fs_ds_index_destroy(index);
+       return ret;
+}
+
+static
+int create_ds_file_groups(struct ctf_fs_trace *ctf_fs_trace)
 {
        int ret = 0;
        const char *basename;
        GError *error = NULL;
        GDir *dir = NULL;
-       struct ctf_fs_file *file = NULL;
-       struct ctf_fs_component *ctf_fs = ctf_fs_trace->ctf_fs;
+       size_t i;
 
-       /* Create one output port for each stream file */
+       /* Check each file in the path directory, except specific ones */
        dir = g_dir_open(ctf_fs_trace->path->str, 0, &error);
        if (!dir) {
-               PERR("Cannot open directory `%s`: %s (code %d)\n",
+               BT_LOGE("Cannot open directory `%s`: %s (code %d)",
                        ctf_fs_trace->path->str, error->message,
                        error->code);
                goto error;
        }
 
        while ((basename = g_dir_read_name(dir))) {
+               struct ctf_fs_file *file;
+
                if (!strcmp(basename, CTF_FS_METADATA_FILENAME)) {
                        /* Ignore the metadata stream. */
-                       PDBG("Ignoring metadata file `%s/%s`\n",
+                       BT_LOGD("Ignoring metadata file `%s" G_DIR_SEPARATOR_S "%s`",
                                ctf_fs_trace->path->str, basename);
                        continue;
                }
 
                if (basename[0] == '.') {
-                       PDBG("Ignoring hidden file `%s/%s`\n",
+                       BT_LOGD("Ignoring hidden file `%s" G_DIR_SEPARATOR_S "%s`",
                                ctf_fs_trace->path->str, basename);
                        continue;
                }
 
                /* Create the file. */
-               file = ctf_fs_file_create(ctf_fs);
+               file = ctf_fs_file_create();
                if (!file) {
-                       PERR("Cannot create stream file object for file `%s/%s`\n",
+                       BT_LOGE("Cannot create stream file object for file `%s" G_DIR_SEPARATOR_S "%s`",
                                ctf_fs_trace->path->str, basename);
                        goto error;
                }
 
                /* Create full path string. */
-               g_string_append_printf(file->path, "%s/%s",
+               g_string_append_printf(file->path, "%s" G_DIR_SEPARATOR_S "%s",
                                ctf_fs_trace->path->str, basename);
                if (!g_file_test(file->path->str, G_FILE_TEST_IS_REGULAR)) {
-                       PDBG("Ignoring non-regular file `%s`\n",
+                       BT_LOGD("Ignoring non-regular file `%s`",
                                file->path->str);
                        ctf_fs_file_destroy(file);
                        file = NULL;
                        continue;
                }
 
-               ret = ctf_fs_file_open(ctf_fs, file, "rb");
+               ret = ctf_fs_file_open(file, "rb");
                if (ret) {
-                       PERR("Cannot open stream file `%s`\n", file->path->str);
+                       BT_LOGE("Cannot open stream file `%s`", file->path->str);
                        goto error;
                }
 
                if (file->size == 0) {
                        /* Skip empty stream. */
-                       PDBG("Ignoring empty file `%s`\n", file->path->str);
+                       BT_LOGD("Ignoring empty file `%s`", file->path->str);
                        ctf_fs_file_destroy(file);
-                       file = NULL;
                        continue;
                }
 
-               ret = create_one_port_for_trace(ctf_fs_trace, file->path->str);
+               ret = add_ds_file_to_ds_file_group(ctf_fs_trace,
+                       file->path->str);
                if (ret) {
-                       PERR("Cannot create output port for file `%s`\n",
+                       BT_LOGE("Cannot add stream file `%s` to stream file group",
                                file->path->str);
+                       ctf_fs_file_destroy(file);
                        goto error;
                }
 
                ctf_fs_file_destroy(file);
-               file = NULL;
+       }
+
+       /*
+        * At this point, DS file groupes are created, but their
+        * associated stream objects do not exist yet. This is because
+        * we need to name the created stream object with the data
+        * stream file's path. We have everything we need here to do
+        * this.
+        */
+       for (i = 0; i < ctf_fs_trace->ds_file_groups->len; i++) {
+               struct ctf_fs_ds_file_group *ds_file_group =
+                       g_ptr_array_index(ctf_fs_trace->ds_file_groups, i);
+               GString *name = get_stream_instance_unique_name(ds_file_group);
+
+               if (!name) {
+                       goto error;
+               }
+
+               if (ds_file_group->stream_id == -1ULL) {
+                       /* No stream ID: use 0 */
+                       ds_file_group->stream = bt_stream_create(
+                               ds_file_group->stream_class, name->str,
+                               ctf_fs_trace->next_stream_id);
+                       ctf_fs_trace->next_stream_id++;
+               } else {
+                       /* Specific stream ID */
+                       ds_file_group->stream = bt_stream_create(
+                               ds_file_group->stream_class, name->str,
+                               ds_file_group->stream_id);
+               }
+
+               g_string_free(name, TRUE);
+
+               if (!ds_file_group->stream) {
+                       BT_LOGE("Cannot create stream for DS file group: "
+                               "addr=%p, stream-name=\"%s\"",
+                               ds_file_group, name->str);
+                       goto error;
+               }
        }
 
        goto end;
@@ -324,7 +915,6 @@ end:
                g_error_free(error);
        }
 
-       ctf_fs_file_destroy(file);
        return ret;
 }
 
@@ -335,26 +925,25 @@ int create_cc_prio_map(struct ctf_fs_trace *ctf_fs_trace)
        size_t i;
        int count;
 
-       assert(ctf_fs_trace);
+       BT_ASSERT(ctf_fs_trace);
        ctf_fs_trace->cc_prio_map = bt_clock_class_priority_map_create();
        if (!ctf_fs_trace->cc_prio_map) {
                ret = -1;
                goto end;
        }
 
-       count = bt_ctf_trace_get_clock_class_count(
+       count = bt_trace_get_clock_class_count(
                ctf_fs_trace->metadata->trace);
-       assert(count >= 0);
+       BT_ASSERT(count >= 0);
 
        for (i = 0; i < count; i++) {
-               struct bt_ctf_clock_class *clock_class =
-                       bt_ctf_trace_get_clock_class_by_index(
+               struct bt_clock_class *clock_class =
+                       bt_trace_borrow_clock_class_by_index(
                                ctf_fs_trace->metadata->trace, i);
 
-               assert(clock_class);
+               BT_ASSERT(clock_class);
                ret = bt_clock_class_priority_map_add_clock_class(
                        ctf_fs_trace->cc_prio_map, clock_class, 0);
-               BT_PUT(clock_class);
 
                if (ret) {
                        goto end;
@@ -365,9 +954,9 @@ end:
        return ret;
 }
 
-static
-struct ctf_fs_trace *ctf_fs_trace_create(struct ctf_fs_component *ctf_fs,
-               const char *path, const char *name)
+BT_HIDDEN
+struct ctf_fs_trace *ctf_fs_trace_create(const char *path, const char *name,
+               struct ctf_fs_metadata_config *metadata_config)
 {
        struct ctf_fs_trace *ctf_fs_trace;
        int ret;
@@ -377,7 +966,6 @@ struct ctf_fs_trace *ctf_fs_trace_create(struct ctf_fs_component *ctf_fs,
                goto end;
        }
 
-       ctf_fs_trace->ctf_fs = ctf_fs;
        ctf_fs_trace->path = g_string_new(path);
        if (!ctf_fs_trace->path) {
                goto error;
@@ -393,21 +981,34 @@ struct ctf_fs_trace *ctf_fs_trace_create(struct ctf_fs_component *ctf_fs,
                goto error;
        }
 
-       ret = ctf_fs_metadata_set_trace(ctf_fs_trace);
+       ctf_fs_trace->ds_file_groups = g_ptr_array_new_with_free_func(
+               (GDestroyNotify) ctf_fs_ds_file_group_destroy);
+       if (!ctf_fs_trace->ds_file_groups) {
+               goto error;
+       }
+
+       ret = ctf_fs_metadata_set_trace(ctf_fs_trace, metadata_config);
        if (ret) {
                goto error;
        }
 
-       ret = create_cc_prio_map(ctf_fs_trace);
+       ret = create_ds_file_groups(ctf_fs_trace);
        if (ret) {
                goto error;
        }
 
-       ret = create_ports_for_trace(ctf_fs_trace);
+       ret = create_cc_prio_map(ctf_fs_trace);
        if (ret) {
                goto error;
        }
 
+       /*
+        * create_ds_file_groups() created all the streams that this
+        * trace needs. There won't be any more. Therefore it is safe to
+        * make this trace static.
+        */
+       (void) bt_trace_set_is_static(ctf_fs_trace->metadata->trace);
+
        goto end;
 
 error:
@@ -428,7 +1029,7 @@ int path_is_ctf_trace(const char *path)
                goto end;
        }
 
-       g_string_printf(metadata_path, "%s/%s", path, CTF_FS_METADATA_FILENAME);
+       g_string_printf(metadata_path, "%s" G_DIR_SEPARATOR_S "%s", path, CTF_FS_METADATA_FILENAME);
 
        if (g_file_test(metadata_path->str, G_FILE_TEST_IS_REGULAR)) {
                ret = 1;
@@ -441,48 +1042,39 @@ end:
 }
 
 static
-int add_trace_path(struct ctf_fs_component *ctf_fs, GList **trace_paths,
-               const char *path)
+int add_trace_path(GList **trace_paths, const char *path)
 {
-       GString *path_str = g_string_new(NULL);
+       GString *norm_path = NULL;
        int ret = 0;
-       char *rp = NULL;
 
-       if (!path_str) {
+       norm_path = bt_common_normalize_path(path, NULL);
+       if (!norm_path) {
+               BT_LOGE("Failed to normalize path `%s`.", path);
                ret = -1;
                goto end;
        }
 
-       /*
-        * Find the real path so that we don't have relative components
-        * in the trace name. This also squashes consecutive slashes and
-        * removes any slash at the end.
-        */
-       rp = realpath(path, NULL);
-       if (!rp) {
-               PERR("realpath() failed: %s (%d)\n", strerror(errno), errno);
+       // FIXME: Remove or ifdef for __MINGW32__
+       if (strcmp(norm_path->str, "/") == 0) {
+               BT_LOGE("Opening a trace in `/` is not supported.");
                ret = -1;
                goto end;
        }
 
-       if (strcmp(rp, "/") == 0) {
-               PERR("Opening a trace in `/` is not supported.\n");
-               ret = -1;
-               goto end;
-       }
-
-       g_string_assign(path_str, rp);
-       *trace_paths = g_list_prepend(*trace_paths, path_str);
-       assert(*trace_paths);
+       *trace_paths = g_list_prepend(*trace_paths, norm_path);
+       BT_ASSERT(*trace_paths);
+       norm_path = NULL;
 
 end:
-       free(rp);
+       if (norm_path) {
+               g_string_free(norm_path, TRUE);
+       }
+
        return ret;
 }
 
-static
-int find_ctf_traces(struct ctf_fs_component *ctf_fs,
-               GList **trace_paths, const char *start_path)
+BT_HIDDEN
+int ctf_fs_find_traces(GList **trace_paths, const char *start_path)
 {
        int ret;
        GError *error = NULL;
@@ -497,10 +1089,10 @@ int find_ctf_traces(struct ctf_fs_component *ctf_fs,
 
        if (ret) {
                /*
-                * Do not even recurse: a CTF trace cannot contain
-                * another CTF trace.
+                * Stop recursion: a CTF trace cannot contain another
+                * CTF trace.
                 */
-               ret = add_trace_path(ctf_fs, trace_paths, start_path);
+               ret = add_trace_path(trace_paths, start_path);
                goto end;
        }
 
@@ -513,12 +1105,12 @@ int find_ctf_traces(struct ctf_fs_component *ctf_fs,
        dir = g_dir_open(start_path, 0, &error);
        if (!dir) {
                if (error->code == G_FILE_ERROR_ACCES) {
-                       PDBG("Cannot open directory `%s`: %s (code %d): continuing\n",
+                       BT_LOGD("Cannot open directory `%s`: %s (code %d): continuing",
                                start_path, error->message, error->code);
                        goto end;
                }
 
-               PERR("Cannot open directory `%s`: %s (code %d)\n",
+               BT_LOGE("Cannot open directory `%s`: %s (code %d)",
                        start_path, error->message, error->code);
                ret = -1;
                goto end;
@@ -532,8 +1124,8 @@ int find_ctf_traces(struct ctf_fs_component *ctf_fs,
                        goto end;
                }
 
-               g_string_printf(sub_path, "%s/%s", start_path, basename);
-               ret = find_ctf_traces(ctf_fs, trace_paths, sub_path->str);
+               g_string_printf(sub_path, "%s" G_DIR_SEPARATOR_S "%s", start_path, basename);
+               ret = ctf_fs_find_traces(trace_paths, sub_path->str);
                g_string_free(sub_path, TRUE);
                if (ret) {
                        goto end;
@@ -552,69 +1144,53 @@ end:
        return ret;
 }
 
-static
-GList *create_trace_names(GList *trace_paths) {
+BT_HIDDEN
+GList *ctf_fs_create_trace_names(GList *trace_paths, const char *base_path) {
        GList *trace_names = NULL;
-       size_t chars_to_strip = 0;
-       size_t at = 0;
        GList *node;
-       bool done = false;
+       const char *last_sep;
+       size_t base_dist;
 
        /*
-        * Find the number of characters to strip from the beginning,
-        * that is, the longest prefix until a common slash (also
-        * stripped).
+        * At this point we know that all the trace paths are
+        * normalized, and so is the base path. This means that
+        * they are absolute and they don't end with a separator.
+        * We can simply find the location of the last separator
+        * in the base path, which gives us the name of the actual
+        * directory to look into, and use this location as the
+        * start of each trace name within each trace path.
+        *
+        * For example:
+        *
+        *     Base path: /home/user/my-traces/some-trace
+        *     Trace paths:
+        *       - /home/user/my-traces/some-trace/host1/trace1
+        *       - /home/user/my-traces/some-trace/host1/trace2
+        *       - /home/user/my-traces/some-trace/host2/trace
+        *       - /home/user/my-traces/some-trace/other-trace
+        *
+        * In this case the trace names are:
+        *
+        *       - some-trace/host1/trace1
+        *       - some-trace/host1/trace2
+        *       - some-trace/host2/trace
+        *       - some-trace/other-trace
         */
-       while (true) {
-               gchar common_ch = '\0';
-
-               for (node = trace_paths; node; node = g_list_next(node)) {
-                       GString *gstr = node->data;
-                       gchar this_ch = gstr->str[at];
-
-                       if (this_ch == '\0') {
-                               done = true;
-                               break;
-                       }
-
-                       if (common_ch == '\0') {
-                               /*
-                                * Establish the expected common
-                                * character at this position.
-                                */
-                               common_ch = this_ch;
-                               continue;
-                       }
-
-                       if (this_ch != common_ch) {
-                               done = true;
-                               break;
-                       }
-               }
-
-               if (done) {
-                       break;
-               }
+       last_sep = strrchr(base_path, G_DIR_SEPARATOR);
 
-               if (common_ch == '/') {
-                       /*
-                        * Common character is a slash: safe to include
-                        * this slash in the number of characters to
-                        * strip because the paths are guaranteed not to
-                        * end with slash.
-                        */
-                       chars_to_strip = at + 1;
-               }
+       /* We know there's at least one separator */
+       BT_ASSERT(last_sep);
 
-               at++;
-       }
+       /* Distance to base */
+       base_dist = last_sep - base_path + 1;
 
        /* Create the trace names */
        for (node = trace_paths; node; node = g_list_next(node)) {
                GString *trace_name = g_string_new(NULL);
                GString *trace_path = node->data;
 
-               g_string_assign(trace_name, &trace_path->str[chars_to_strip]);
+               BT_ASSERT(trace_name);
+               g_string_assign(trace_name, &trace_path->str[base_dist]);
                trace_names = g_list_append(trace_names, trace_name);
        }
 
@@ -627,25 +1203,33 @@ int create_ctf_fs_traces(struct ctf_fs_component *ctf_fs,
 {
        struct ctf_fs_trace *ctf_fs_trace = NULL;
        int ret = 0;
+       GString *norm_path = NULL;
        GList *trace_paths = NULL;
        GList *trace_names = NULL;
        GList *tp_node;
        GList *tn_node;
 
-       ret = find_ctf_traces(ctf_fs, &trace_paths, path_param);
+       norm_path = bt_common_normalize_path(path_param, NULL);
+       if (!norm_path) {
+               BT_LOGE("Failed to normalize path: `%s`.",
+                       path_param);
+               goto error;
+       }
+
+       ret = ctf_fs_find_traces(&trace_paths, norm_path->str);
        if (ret) {
                goto error;
        }
 
        if (!trace_paths) {
-               PERR("No CTF traces recursively found in `%s`.\n",
+               BT_LOGE("No CTF traces recursively found in `%s`.",
                        path_param);
                goto error;
        }
 
-       trace_names = create_trace_names(trace_paths);
+       trace_names = ctf_fs_create_trace_names(trace_paths, norm_path->str);
        if (!trace_names) {
-               PERR("Cannot create trace names from trace paths.\n");
+               BT_LOGE("Cannot create trace names from trace paths.");
                goto error;
        }
 
@@ -655,17 +1239,23 @@ int create_ctf_fs_traces(struct ctf_fs_component *ctf_fs,
                GString *trace_path = tp_node->data;
                GString *trace_name = tn_node->data;
 
-               ctf_fs_trace = ctf_fs_trace_create(ctf_fs, trace_path->str,
-                       trace_name->str);
+               ctf_fs_trace = ctf_fs_trace_create(trace_path->str,
+                               trace_name->str, &ctf_fs->metadata_config);
                if (!ctf_fs_trace) {
-                       PERR("Cannot create trace for `%s`.\n",
+                       BT_LOGE("Cannot create trace for `%s`.",
                                trace_path->str);
                        goto error;
                }
+
+               ret = create_ports_for_trace(ctf_fs, ctf_fs_trace);
+               if (ret) {
+                       goto error;
+               }
+
+               g_ptr_array_add(ctf_fs->traces, ctf_fs_trace);
+               ctf_fs_trace = NULL;
        }
 
-       g_ptr_array_add(ctf_fs->traces, ctf_fs_trace);
-       ctf_fs_trace = NULL;
        goto end;
 
 error:
@@ -693,6 +1283,10 @@ end:
                g_list_free(trace_names);
        }
 
+       if (norm_path) {
+               g_string_free(norm_path, TRUE);
+       }
+
        return ret;
 }
 
@@ -703,7 +1297,8 @@ struct ctf_fs_component *ctf_fs_create(struct bt_private_component *priv_comp,
        struct ctf_fs_component *ctf_fs;
        struct bt_value *value = NULL;
        const char *path_param;
-       int ret;
+       enum bt_component_status ret;
+       enum bt_value_status value_ret;
 
        ctf_fs = g_new0(struct ctf_fs_component, 1);
        if (!ctf_fs) {
@@ -711,7 +1306,7 @@ struct ctf_fs_component *ctf_fs_create(struct bt_private_component *priv_comp,
        }
 
        ret = bt_private_component_set_user_data(priv_comp, ctf_fs);
-       assert(ret == 0);
+       BT_ASSERT(ret == BT_COMPONENT_STATUS_OK);
 
        /*
         * We don't need to get a new reference here because as long as
@@ -719,58 +1314,47 @@ struct ctf_fs_component *ctf_fs_create(struct bt_private_component *priv_comp,
         * private component should also exist.
         */
        ctf_fs->priv_comp = priv_comp;
-       value = bt_value_map_get(params, "path");
-       if (!bt_value_is_string(value)) {
+       value = bt_value_map_borrow(params, "path");
+       if (value && !bt_value_is_string(value)) {
                goto error;
        }
 
-       ret = bt_value_string_get(value, &path_param);
-       assert(ret == 0);
-       BT_PUT(value);
-       value = bt_value_map_get(params, "offset-s");
+       value_ret = bt_value_string_get(value, &path_param);
+       BT_ASSERT(value_ret == BT_VALUE_STATUS_OK);
+       value = bt_value_map_borrow(params, "clock-class-offset-s");
        if (value) {
-               int64_t offset;
-
                if (!bt_value_is_integer(value)) {
-                       fprintf(stderr,
-                               "offset-s should be an integer\n");
+                       BT_LOGE("clock-class-offset-s should be an integer");
                        goto error;
                }
-               ret = bt_value_integer_get(value, &offset);
-               assert(ret == 0);
-               ctf_fs->options.clock_offset = offset;
-               BT_PUT(value);
+               value_ret = bt_value_integer_get(value,
+                       &ctf_fs->metadata_config.clock_class_offset_s);
+               BT_ASSERT(value_ret == BT_VALUE_STATUS_OK);
        }
 
-       value = bt_value_map_get(params, "offset-ns");
+       value = bt_value_map_borrow(params, "clock-class-offset-ns");
        if (value) {
-               int64_t offset;
-
                if (!bt_value_is_integer(value)) {
-                       fprintf(stderr,
-                               "offset-ns should be an integer\n");
+                       BT_LOGE("clock-class-offset-ns should be an integer");
                        goto error;
                }
-               ret = bt_value_integer_get(value, &offset);
-               assert(ret == 0);
-               ctf_fs->options.clock_offset_ns = offset;
-               BT_PUT(value);
+               value_ret = bt_value_integer_get(value,
+                       &ctf_fs->metadata_config.clock_class_offset_ns);
+               BT_ASSERT(value_ret == BT_VALUE_STATUS_OK);
        }
 
-       ctf_fs->error_fp = stderr;
-       ctf_fs->page_size = (size_t) getpagesize();
        ctf_fs->port_data = g_ptr_array_new_with_free_func(port_data_destroy);
        if (!ctf_fs->port_data) {
                goto error;
        }
 
-       ctf_fs->traces = g_ptr_array_new_with_free_func(ctf_fs_trace_destroy);
+       ctf_fs->traces = g_ptr_array_new_with_free_func(
+                       ctf_fs_trace_destroy_notifier);
        if (!ctf_fs->traces) {
                goto error;
        }
 
-       ret = create_ctf_fs_traces(ctf_fs, path_param);
-       if (ret) {
+       if (create_ctf_fs_traces(ctf_fs, path_param)) {
                goto error;
        }
 
@@ -780,10 +1364,9 @@ error:
        ctf_fs_destroy(ctf_fs);
        ctf_fs = NULL;
        ret = bt_private_component_set_user_data(priv_comp, NULL);
-       assert(ret == 0);
+       BT_ASSERT(ret == BT_COMPONENT_STATUS_OK);
 
 end:
-       bt_put(value);
        return ctf_fs;
 }
 
@@ -794,7 +1377,6 @@ enum bt_component_status ctf_fs_init(struct bt_private_component *priv_comp,
        struct ctf_fs_component *ctf_fs;
        enum bt_component_status ret = BT_COMPONENT_STATUS_OK;
 
-       ctf_fs_debug = g_strcmp0(getenv("CTF_FS_DEBUG"), "1") == 0;
        ctf_fs = ctf_fs_create(priv_comp, params);
        if (!ctf_fs) {
                ret = BT_COMPONENT_STATUS_ERROR;
@@ -804,128 +1386,25 @@ enum bt_component_status ctf_fs_init(struct bt_private_component *priv_comp,
 }
 
 BT_HIDDEN
-struct bt_value *ctf_fs_query(struct bt_component_class *comp_class,
+struct bt_component_class_query_method_return ctf_fs_query(
+               struct bt_component_class *comp_class,
+               struct bt_query_executor *query_exec,
                const char *object, struct bt_value *params)
 {
-       struct bt_value *results = NULL;
-       struct bt_value *path_value = NULL;
-       char *metadata_text = NULL;
-       FILE *metadata_fp = NULL;
-       GString *g_metadata_text = NULL;
-
-       if (strcmp(object, "metadata-info") == 0) {
-               int ret;
-               int bo;
-               const char *path;
-               bool is_packetized;
-
-               results = bt_value_map_create();
-               if (!results) {
-                       goto error;
-               }
-
-               if (!bt_value_is_map(params)) {
-                       fprintf(stderr,
-                               "Query parameters is not a map value object\n");
-                       goto error;
-               }
-
-               path_value = bt_value_map_get(params, "path");
-               ret = bt_value_string_get(path_value, &path);
-               if (ret) {
-                       fprintf(stderr,
-                               "Cannot get `path` string parameter\n");
-                       goto error;
-               }
-
-               assert(path);
-               metadata_fp = ctf_fs_metadata_open_file(path);
-               if (!metadata_fp) {
-                       fprintf(stderr,
-                               "Cannot open trace at path `%s`\n", path);
-                       goto error;
-               }
-
-               is_packetized = ctf_metadata_decoder_is_packetized(metadata_fp,
-                       &bo);
-
-               if (is_packetized) {
-                       ret = ctf_metadata_decoder_packetized_file_stream_to_buf(
-                               metadata_fp, &metadata_text, bo);
-                       if (ret) {
-                               fprintf(stderr,
-                                       "Cannot decode packetized metadata file\n");
-                               goto error;
-                       }
-               } else {
-                       long filesize;
-
-                       fseek(metadata_fp, 0, SEEK_END);
-                       filesize = ftell(metadata_fp);
-                       rewind(metadata_fp);
-                       metadata_text = malloc(filesize + 1);
-                       if (!metadata_text) {
-                               fprintf(stderr,
-                                       "Cannot allocate buffer for metadata text\n");
-                               goto error;
-                       }
-
-                       if (fread(metadata_text, filesize, 1, metadata_fp) !=
-                                       1) {
-                               fprintf(stderr,
-                                       "Cannot read metadata file\n");
-                               goto error;
-                       }
-
-                       metadata_text[filesize] = '\0';
-               }
-
-               g_metadata_text = g_string_new(NULL);
-               if (!g_metadata_text) {
-                       goto error;
-               }
-
-               if (strncmp(metadata_text, METADATA_TEXT_SIG,
-                               sizeof(METADATA_TEXT_SIG) - 1) != 0) {
-                       g_string_assign(g_metadata_text, METADATA_TEXT_SIG);
-                       g_string_append(g_metadata_text, " */\n\n");
-               }
-
-               g_string_append(g_metadata_text, metadata_text);
-
-               ret = bt_value_map_insert_string(results, "text",
-                       g_metadata_text->str);
-               if (ret) {
-                       fprintf(stderr, "Cannot insert metadata text into results\n");
-                       goto error;
-               }
-
-               ret = bt_value_map_insert_bool(results, "is-packetized",
-                       is_packetized);
-               if (ret) {
-                       fprintf(stderr, "Cannot insert is packetized into results\n");
-                       goto error;
-               }
+       struct bt_component_class_query_method_return ret = {
+               .result = NULL,
+               .status = BT_QUERY_STATUS_OK,
+       };
+
+       if (!strcmp(object, "metadata-info")) {
+               ret = metadata_info_query(comp_class, params);
+       } else if (!strcmp(object, "trace-info")) {
+               ret = trace_info_query(comp_class, params);
        } else {
-               fprintf(stderr, "Unknown query object `%s`\n", object);
-               goto error;
+               BT_LOGE("Unknown query object `%s`", object);
+               ret.status = BT_QUERY_STATUS_INVALID_OBJECT;
+               goto end;
        }
-
-       goto end;
-
-error:
-       BT_PUT(results);
-
 end:
-       bt_put(path_value);
-       free(metadata_text);
-
-       if (g_metadata_text) {
-               g_string_free(g_metadata_text, TRUE);
-       }
-
-       if (metadata_fp) {
-               fclose(metadata_fp);
-       }
-       return results;
+       return ret;
 }
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