+ int ret = 0;
+
+ if (td->io_ops->init) {
+ ret = td->io_ops->init(td);
+ if (ret && td->o.iodepth > 1) {
+ log_err("fio: io engine init failed. Perhaps try"
+ " reducing io depth?\n");
+ }
+ }
+
+ return ret;
+}
+
+int td_io_commit(struct thread_data *td)
+{
+ dprint(FD_IO, "calling ->commit(), depth %d\n", td->cur_depth);
+
+ if (!td->cur_depth || !td->io_u_queued)
+ return 0;
+
+ io_u_mark_depth(td, td->io_u_queued);
+ td->io_u_queued = 0;
+
+ if (td->io_ops->commit)
+ return td->io_ops->commit(td);
+
+ return 0;
+}
+
+int td_io_open_file(struct thread_data *td, struct fio_file *f)
+{
+ if (td->io_ops->open_file(td, f)) {
+ if (td->error == EINVAL && td->o.odirect)
+ log_err("fio: destination does not support O_DIRECT\n");
+ if (td->error == EMFILE) {
+ log_err("fio: try reducing/setting openfiles (failed"
+ " at %u of %u)\n", td->nr_open_files,
+ td->o.nr_files);
+ }
+
+ return 1;
+ }
+
+ if (f->filetype == FIO_TYPE_PIPE) {
+ if (td_random(td)) {
+ log_err("fio: can't seek on pipes (no random io)\n");
+ goto err;
+ }
+ }
+
+ fio_file_reset(f);
+ f->flags |= FIO_FILE_OPEN;
+ f->flags &= ~FIO_FILE_CLOSING;
+
+ if (td->io_ops->flags & FIO_DISKLESSIO)
+ goto done;
+
+ if (td->o.invalidate_cache && file_invalidate_cache(td, f))
+ goto err;
+
+ if (td->o.fadvise_hint &&
+ (f->filetype == FIO_TYPE_BD || f->filetype == FIO_TYPE_FILE)) {
+ int flags;
+
+ if (td_random(td))
+ flags = POSIX_FADV_RANDOM;
+ else
+ flags = POSIX_FADV_SEQUENTIAL;
+
+ if (fadvise(f->fd, f->file_offset, f->io_size, flags) < 0) {
+ td_verror(td, errno, "fadvise");
+ goto err;
+ }
+ }
+
+ if (f->file_map)
+ memset(f->file_map, 0, f->num_maps * sizeof(long));