+ return fio_io_end(td, io_u, ret);
+}
+
+static int fio_vsyncio_getevents(struct thread_data *td, unsigned int min,
+ unsigned int max,
+ struct timespec fio_unused *t)
+{
+ struct syncio_data *sd = td->io_ops->data;
+ int ret;
+
+ if (min) {
+ ret = sd->events;
+ sd->events = 0;
+ } else
+ ret = 0;
+
+ dprint(FD_IO, "vsyncio_getevents: min=%d,max=%d: %d\n", min, max, ret);
+ return ret;
+}
+
+static struct io_u *fio_vsyncio_event(struct thread_data *td, int event)
+{
+ struct syncio_data *sd = td->io_ops->data;
+
+ return sd->io_us[event];
+}
+
+static int fio_vsyncio_append(struct thread_data *td, struct io_u *io_u)
+{
+ struct syncio_data *sd = td->io_ops->data;
+
+ if (ddir_sync(io_u->ddir))
+ return 0;
+
+ if (io_u->offset == sd->last_offset && io_u->file == sd->last_file &&
+ io_u->ddir == sd->last_ddir)
+ return 1;
+
+ return 0;
+}
+
+static void fio_vsyncio_set_iov(struct syncio_data *sd, struct io_u *io_u,
+ int idx)
+{
+ sd->io_us[idx] = io_u;
+ sd->iovecs[idx].iov_base = io_u->xfer_buf;
+ sd->iovecs[idx].iov_len = io_u->xfer_buflen;
+ sd->last_offset = io_u->offset + io_u->xfer_buflen;
+ sd->last_file = io_u->file;
+ sd->last_ddir = io_u->ddir;
+ sd->queued_bytes += io_u->xfer_buflen;
+ sd->queued++;
+}
+
+static int fio_vsyncio_queue(struct thread_data *td, struct io_u *io_u)
+{
+ struct syncio_data *sd = td->io_ops->data;
+
+ fio_ro_check(td, io_u);
+
+ if (!fio_vsyncio_append(td, io_u)) {
+ dprint(FD_IO, "vsyncio_queue: no append (%d)\n", sd->queued);
+ /*
+ * If we can't append and have stuff queued, tell fio to
+ * commit those first and then retry this io
+ */
+ if (sd->queued)
+ return FIO_Q_BUSY;
+ if (ddir_sync(io_u->ddir)) {
+ int ret = do_io_u_sync(td, io_u);
+
+ return fio_io_end(td, io_u, ret);
+ }
+
+ sd->queued = 0;
+ sd->queued_bytes = 0;
+ fio_vsyncio_set_iov(sd, io_u, 0);
+ } else {
+ if (sd->queued == td->o.iodepth) {
+ dprint(FD_IO, "vsyncio_queue: max depth %d\n", sd->queued);
+ return FIO_Q_BUSY;
+ }
+
+ dprint(FD_IO, "vsyncio_queue: append\n");
+ fio_vsyncio_set_iov(sd, io_u, sd->queued);
+ }
+
+ dprint(FD_IO, "vsyncio_queue: depth now %d\n", sd->queued);
+ return FIO_Q_QUEUED;
+}
+
+/*
+ * Check that we transferred all bytes, or saw an error, etc
+ */
+static int fio_vsyncio_end(struct thread_data *td, ssize_t bytes)
+{
+ struct syncio_data *sd = td->io_ops->data;
+ struct io_u *io_u;
+ unsigned int i;
+ int err;
+
+ /*
+ * transferred everything, perfect
+ */
+ if (bytes == sd->queued_bytes)
+ return 0;
+
+ err = errno;
+ for (i = 0; i < sd->queued; i++) {
+ io_u = sd->io_us[i];
+
+ if (bytes == -1) {
+ io_u->error = err;
+ } else {
+ unsigned int this_io;
+
+ this_io = bytes;
+ if (this_io > io_u->xfer_buflen)
+ this_io = io_u->xfer_buflen;
+
+ io_u->resid = io_u->xfer_buflen - this_io;