static int trace_dump_metadata(struct trace_dumper_configuration_s *conf, struct trace_record_file *record_file, struct trace_mapped_buffer *mapped_buffer)
{
int rc = open_trace_file_if_necessary(conf);
if (0 != rc) {
return rc;
}
if (trace_dumper_wait_record_file_async_io_completion(record_file, TRACE_FOREVER) < 0) {
const size_t n_bytes = record_file->async_writes->aio_nbytes;
const off64_t offset = record_file->async_writes->aio_offset;
if (trace_dumper_async_timed_out()) {
DEBUG("Metadata dumping deferred due to", n_bytes, "previous data pending async write at ", offset, "for the file", record_file->filename, strerror(errno));
}
else {
ERR("Delayed write of ", n_bytes, "failed at", offset, "with err", errno, strerror(errno));
}
return -1;
}
if (trace_dumper_net_num_records_pending(record_file) > 0) {
DEBUG("Metadata dumping deferred because the internal buffer is not fully flushed for the file", record_file->filename);
errno = EAGAIN;
return -1;
}
mapped_buffer->metadata.metadata_payload_record.ts = trace_get_nsec();
/* TODO: write a validator for metadata. */
record_file->post_write_validator = NULL;
/* TODO: Introduce rollback logic, like we have for regular data writes */
rc = write_metadata_header_start(conf, record_file, mapped_buffer);
if (0 != rc) {
return -1;
}
if (mapped_buffer->metadata.metadata_iovec_len > 0) {
TRACE_ASSERT(NULL != mapped_buffer->metadata.metadata_iovec);
rc = trace_dumper_write(conf, record_file, mapped_buffer->metadata.metadata_iovec, mapped_buffer->metadata.metadata_iovec_len);
if ((size_t) rc != (mapped_buffer->metadata.metadata_iovec_len / 2) * sizeof(struct trace_record)) {
if (0 == errno) {
errno = EIO;
}
return -1;
}
}
else {
syslog(LOG_USER|LOG_WARNING, "Trace dumper could not dump metadata for the process %s (pid %u) because it has length 0",
mapped_buffer->name, mapped_buffer->pid);
}
return write_metadata_end(conf, record_file, mapped_buffer);
}
static int trace_dump_metadata(struct trace_dumper_configuration_s *conf, struct trace_mapped_buffer *mapped_buffer)
{
struct trace_record rec;
unsigned int num_records;
int rc;
mapped_buffer->metadata.metadata_payload_record.ts = trace_get_nsec();
memset(&rec, 0, sizeof(rec));
rc = write_metadata_header_start(conf, mapped_buffer);
if (0 != rc) {
return -1;
}
num_records = mapped_buffer->metadata.size / (TRACE_RECORD_PAYLOAD_SIZE) + ((mapped_buffer->metadata.size % (TRACE_RECORD_PAYLOAD_SIZE)) ? 1 : 0);
rc = trace_dumper_write(conf, &conf->record_file, mapped_buffer->metadata.metadata_iovec, 2 * num_records);
if ((unsigned int) rc != num_records * sizeof(struct trace_record)) {
return -1;
}
rc = write_metadata_end(conf, mapped_buffer);
return rc;
}
