.get_stream = medop_get_stream,
};
+static
+int build_index_from_idx_file(struct ctf_fs_stream *stream)
+{
+ int ret = 0;
+ gchar *directory = NULL;
+ gchar *basename = NULL;
+ GString *index_basename = NULL;
+ gchar *index_file_path = NULL;
+ GMappedFile *mapped_file = NULL;
+ gsize filesize;
+ const struct ctf_packet_index_file_hdr *header;
+ const char *mmap_begin, *file_pos;
+ struct index_entry *index;
+ uint64_t total_packets_size = 0;
+ size_t file_index_entry_size;
+ size_t file_entry_count;
+ size_t i;
+
+ /* Look for index file in relative path index/name.idx. */
+ basename = g_path_get_basename(stream->file->path->str);
+ if (!basename) {
+ ret = -1;
+ goto end;
+ }
+
+ directory = g_path_get_dirname(stream->file->path->str);
+ if (!directory) {
+ ret = -1;
+ goto end;
+ }
+
+ index_basename = g_string_new(basename);
+ if (!index_basename) {
+ ret = -1;
+ goto end;
+ }
+
+ g_string_append(index_basename, ".idx");
+ index_file_path = g_build_filename(directory, "index",
+ index_basename->str, NULL);
+ mapped_file = g_mapped_file_new(index_file_path, FALSE, NULL);
+ filesize = g_mapped_file_get_length(mapped_file);
+ if (filesize < sizeof(*header)) {
+ printf_error("Invalid LTTng trace index: file size < header size");
+ ret = -1;
+ goto end;
+ }
+
+ mmap_begin = g_mapped_file_get_contents(mapped_file);
+ header = (struct ctf_packet_index_file_hdr *) mmap_begin;
+
+ file_pos = g_mapped_file_get_contents(mapped_file) + sizeof(*header);
+ if (be32toh(header->magic) != CTF_INDEX_MAGIC) {
+ printf_error("Invalid LTTng trace index: \"magic\" validation failed");
+ ret = -1;
+ goto end;
+ }
+ stream->index.version.major = be32toh(header->index_major);
+ stream->index.version.minor = be32toh(header->index_minor);
+
+ file_index_entry_size = be32toh(header->packet_index_len);
+ file_entry_count = (filesize - sizeof(*header)) / file_index_entry_size;
+ if ((filesize - sizeof(*header)) % (file_entry_count * file_index_entry_size)) {
+ printf_error("Invalid index file size; not a multiple of index entry size");
+ ret = -1;
+ goto end;
+ }
+
+ stream->index.entries = g_array_sized_new(FALSE, TRUE,
+ sizeof(struct index_entry), file_entry_count);
+ if (!stream->index.entries) {
+ ret = -1;
+ goto end;
+ }
+ index = (struct index_entry *) stream->index.entries->data;
+ for (i = 0; i < file_entry_count; i++) {
+ struct ctf_packet_index *file_index =
+ (struct ctf_packet_index *) file_pos;
+ uint64_t packet_size = be64toh(file_index->packet_size);
+
+ if (packet_size % CHAR_BIT) {
+ ret = -1;
+ printf_error("Invalid packet size encountered in index file");
+ goto invalid_index;
+ }
+
+ /* Convert size in bits to bytes. */
+ packet_size /= CHAR_BIT;
+ index->packet_size = packet_size;
+
+ index->offset = be64toh(file_index->offset);
+ if (i != 0 && index->offset < (index - 1)->offset) {
+ printf_error("Invalid, non-monotonic, packet offset encountered in index file");
+ ret = -1;
+ goto invalid_index;
+ }
+
+ index->timestamp_begin = be64toh(file_index->timestamp_begin);
+ index->timestamp_end = be64toh(file_index->timestamp_end);
+ if (index->timestamp_end < index->timestamp_begin) {
+ printf_error("Invalid packet time bounds encountered in index file");
+ ret = -1;
+ goto invalid_index;
+ }
+
+ total_packets_size += packet_size;
+ file_pos += file_index_entry_size;
+ index++;
+ }
+
+ /* Validate that the index addresses the complete stream. */
+ if (stream->file->size != total_packets_size) {
+ printf_error("Invalid index; indexed size != stream file size");
+ ret = -1;
+ goto invalid_index;
+ }
+end:
+ g_free(directory);
+ g_free(basename);
+ g_free(index_file_path);
+ g_string_free(index_basename, TRUE);
+ g_mapped_file_unref(mapped_file);
+ return ret;
+invalid_index:
+ g_array_free(stream->index.entries, TRUE);
+ goto end;
+}
+
+static
+int build_index_from_stream(struct ctf_fs_stream *stream)
+{
+ int ret = 0;
+end:
+ return ret;
+}
+
+static
+int init_stream_index(struct ctf_fs_stream *stream)
+{
+ int ret;
+
+ ret = build_index_from_idx_file(stream);
+ if (!ret) {
+ goto end;
+ }
+
+ ret = build_index_from_stream(stream);
+end:
+ return ret;
+}
+
BT_HIDDEN
struct ctf_fs_stream *ctf_fs_stream_create(
struct ctf_fs_component *ctf_fs, struct ctf_fs_file *file)
{
+ int ret;
struct ctf_fs_stream *stream = g_new0(struct ctf_fs_stream, 1);
if (!stream) {
}
stream->mmap_max_len = ctf_fs->page_size * 2048;
+ ret = init_stream_index(stream);
+ if (ret) {
+ goto error;
+ }
goto end;
error:
/* Do not touch "borrowed" file. */
bt_ctf_notif_iter_destroy(stream->notif_iter);
}
+ if (stream->index.entries) {
+ g_array_free(stream->index.entries, TRUE);
+ }
+
g_free(stream);
}
--- /dev/null
+/*
+ * Copyright (C) 2013 - Julien Desfossez <jdesfossez@efficios.com>
+ * Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ * David Goulet <dgoulet@efficios.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#ifndef LTTNG_INDEX_H
+#define LTTNG_INDEX_H
+
+#include <babeltrace/compat/limits.h>
+
+#define CTF_INDEX_MAGIC 0xC1F1DCC1
+#define CTF_INDEX_MAJOR 1
+#define CTF_INDEX_MINOR 1
+
+/*
+ * Header at the beginning of each index file.
+ * All integer fields are stored in big endian.
+ */
+struct ctf_packet_index_file_hdr {
+ uint32_t magic;
+ uint32_t index_major;
+ uint32_t index_minor;
+ /* size of struct ctf_packet_index, in bytes. */
+ uint32_t packet_index_len;
+} __attribute__((__packed__));
+
+/*
+ * Packet index generated for each trace packet store in a trace file.
+ * All integer fields are stored in big endian.
+ */
+struct ctf_packet_index {
+ uint64_t offset; /* offset of the packet in the file, in bytes */
+ uint64_t packet_size; /* packet size, in bits */
+ uint64_t content_size; /* content size, in bits */
+ uint64_t timestamp_begin;
+ uint64_t timestamp_end;
+ uint64_t events_discarded;
+ uint64_t stream_id;
+ /* CTF_INDEX 1.0 limit */
+ uint64_t stream_instance_id; /* ID of the channel instance */
+ uint64_t packet_seq_num; /* packet sequence number */
+} __attribute__((__packed__));
+
+#endif /* LTTNG_INDEX_H */
projects / babeltrace.git / commitdiff
