+ close(td->ctf_trace.metadata.pos.fd);
+ return ret;
+}
+
+
+static
+int create_stream_packet_index(struct trace_descriptor *td,
+ struct ctf_file_stream *file_stream)
+{
+ struct ctf_stream *stream;
+ int len_index;
+ struct stream_pos *pos;
+ struct stat filestats;
+ struct packet_index packet_index;
+ int first_packet = 1;
+ int ret;
+
+ pos = &file_stream->pos;
+
+ ret = fstat(pos->fd, &filestats);
+ if (ret < 0)
+ return ret;
+
+ for (pos->mmap_offset = 0; pos->mmap_offset < filestats.st_size; ) {
+ uint64_t stream_id = 0;
+
+ if (pos->base) {
+ /* unmap old base */
+ ret = munmap(pos->base, pos->packet_size);
+ if (ret) {
+ fprintf(stdout, "Unable to unmap old base: %s.\n",
+ strerror(errno));
+ return ret;
+ }
+ }
+ /* map new base. Need mapping length from header. */
+ pos->base = mmap(NULL, MAX_PACKET_HEADER_LEN, PROT_READ,
+ MAP_PRIVATE, pos->fd, pos->mmap_offset);
+ pos->content_size = 0; /* Unknown at this point */
+ pos->packet_size = 0; /* Unknown at this point */
+ pos->offset = 0; /* Position of the packet header */
+
+ /* read and check header, set stream id (and check) */
+ if (td->ctf_trace.packet_header) {
+ /* Read packet header */
+ td->ctf_trace.packet_header->p.declaration->copy(NULL, NULL,
+ pos, &ctf_format, &td->ctf_trace.packet_header->p);
+
+ len_index = struct_declaration_lookup_field_index(td->ctf_trace.packet_header->declaration, g_quark_from_static_string("magic"));
+ if (len_index >= 0) {
+ struct definition_integer *defint;
+ struct field *field;
+
+ field = struct_definition_get_field_from_index(td->ctf_trace.packet_header, len_index);
+ assert(field->definition->declaration->id == CTF_TYPE_INTEGER);
+ defint = container_of(field->definition, struct definition_integer, p);
+ assert(defint->declaration->signedness == FALSE);
+ if (defint->value._unsigned != CTF_MAGIC) {
+ fprintf(stdout, "[error] Invalid magic number %" PRIX64 ".\n",
+ defint->value._unsigned);
+ return -EINVAL;
+ }
+ }
+
+ /* check uuid */
+ len_index = struct_declaration_lookup_field_index(td->ctf_trace.packet_header->declaration, g_quark_from_static_string("trace_uuid"));
+ if (len_index >= 0) {
+ struct definition_array *defarray;
+ struct field *field;
+ uint64_t i;
+ uint8_t uuidval[UUID_LEN];
+
+
+ field = struct_definition_get_field_from_index(td->ctf_trace.packet_header, len_index);
+ assert(field->definition->declaration->id == CTF_TYPE_ARRAY);
+ defarray = container_of(field->definition, struct definition_array, p);
+ assert(defarray->declaration->len == UUID_LEN);
+ assert(defarray->declaration->elem->id == CTF_TYPE_INTEGER);
+
+ for (i = 0; i < UUID_LEN; i++) {
+ struct definition *elem;
+ struct definition_integer *defint;
+
+ elem = array_index(defarray, i);
+ assert(elem);
+ defint = container_of(elem, struct definition_integer, p);
+ uuidval[i] = defint->value._unsigned;
+ }
+ ret = uuid_compare(td->ctf_trace.uuid, uuidval);
+ if (ret) {
+ fprintf(stdout, "[error] Unique Universal Identifiers do not match.\n");
+ return -EINVAL;
+ }
+ }
+
+
+ len_index = struct_declaration_lookup_field_index(td->ctf_trace.packet_header->declaration, g_quark_from_static_string("stream_id"));
+ if (len_index >= 0) {
+ struct definition_integer *defint;
+ struct field *field;
+
+ field = struct_definition_get_field_from_index(td->ctf_trace.packet_header, len_index);
+ assert(field->definition->declaration->id == CTF_TYPE_INTEGER);
+ defint = container_of(field->definition, struct definition_integer, p);
+ assert(defint->declaration->signedness == FALSE);
+ stream_id = defint->value._unsigned;
+ }
+ }
+
+ if (!first_packet && file_stream->stream_id != stream_id) {
+ fprintf(stdout, "[error] Stream ID is changing within a stream.\n");
+ return -EINVAL;
+ }
+ if (first_packet) {
+ file_stream->stream_id = stream_id;
+ if (stream_id >= td->ctf_trace.streams->len) {
+ fprintf(stdout, "[error] Stream %" PRIu64 " is not declared in metadata.\n", stream_id);
+ return -EINVAL;
+ }
+ stream = g_ptr_array_index(td->ctf_trace.streams, stream_id);
+ if (!stream) {
+ fprintf(stdout, "[error] Stream %" PRIu64 " is not declared in metadata.\n", stream_id);
+ return -EINVAL;
+ }
+ file_stream->stream = stream;
+ }
+ first_packet = 0;
+
+ /* Read packet context */
+ stream->packet_context->p.declaration->copy(NULL, NULL,
+ pos, &ctf_format, &stream->packet_context->p);
+
+ /* read content size from header */
+ len_index = struct_declaration_lookup_field_index(stream->packet_context->declaration, g_quark_from_static_string("content_size"));
+ if (len_index >= 0) {
+ struct definition_integer *defint;
+ struct field *field;
+
+ field = struct_definition_get_field_from_index(stream->packet_context, len_index);
+ assert(field->definition->declaration->id == CTF_TYPE_INTEGER);
+ defint = container_of(field->definition, struct definition_integer, p);
+ assert(defint->declaration->signedness == FALSE);
+ pos->content_size = defint->value._unsigned;
+ } else {
+ /* Use file size for packet size */
+ pos->content_size = filestats.st_size * CHAR_BIT;
+ }
+
+ /* read packet size from header */
+ len_index = struct_declaration_lookup_field_index(stream->packet_context->declaration, g_quark_from_static_string("packet_size"));
+ if (len_index >= 0) {
+ struct definition_integer *defint;
+ struct field *field;
+
+ field = struct_definition_get_field_from_index(stream->packet_context, len_index);
+ assert(field->definition->declaration->id == CTF_TYPE_INTEGER);
+ defint = container_of(field->definition, struct definition_integer, p);
+ assert(defint->declaration->signedness == FALSE);
+ pos->packet_size = defint->value._unsigned;
+ } else {
+ /* Use content size if non-zero, else file size */
+ pos->packet_size = pos->content_size ? : filestats.st_size * CHAR_BIT;
+ }
+
+ packet_index.offset = pos->mmap_offset;
+ packet_index.content_size = pos->content_size;
+ packet_index.packet_size = pos->packet_size;
+ /* add index to packet array */
+ g_array_append_val(file_stream->pos.packet_index, packet_index);
+
+ pos->mmap_offset += pos->packet_size / CHAR_BIT;
+ }
+
+ return 0;
+}
+
+/*
+ * Note: many file streams can inherit from the same stream class
+ * description (metadata).
+ */
+static
+int ctf_open_file_stream_read(struct trace_descriptor *td, const char *path, int flags)
+{
+ int ret;
+ struct ctf_file_stream *file_stream;
+
+ ret = openat(td->ctf_trace.dirfd, path, flags);
+ if (ret < 0)
+ goto error;
+ file_stream = g_new0(struct ctf_file_stream, 1);
+ file_stream->pos.fd = ret;
+ file_stream->pos.packet_index = g_array_new(FALSE, TRUE,
+ sizeof(struct packet_index));
+ ret = create_stream_packet_index(td, file_stream);
+ if (ret)
+ goto error_index;
+ /* Add stream file to stream class */
+ g_ptr_array_add(file_stream->stream->files, file_stream);
+ return 0;
+
+error_index:
+ (void) g_array_free(file_stream->pos.packet_index, TRUE);
+ close(file_stream->pos.fd);
+ g_free(file_stream);
+error:
projects / babeltrace.git / commitdiff
