Function vdev_draid_io_start

freebsd/contrib/openzfs/module/zfs/vdev_draid.c:2190–2214

* Start an IO operation to a dRAID vdev. */

 * Start an IO operation to a dRAID vdev.
 */
static void
vdev_draid_io_start(zio_t *zio)
{
	vdev_t *vd __maybe_unused = zio->io_vd;
	raidz_map_t *rm;

	ASSERT3P(vd->vdev_ops, ==, &vdev_draid_ops);
	ASSERT3U(zio->io_offset, ==, vdev_draid_get_astart(vd, zio->io_offset));

	rm = vdev_draid_map_alloc(zio);

	if (zio->io_type == ZIO_TYPE_WRITE) {
		for (int i = 0; i < rm->rm_nrows; i++) {
			vdev_draid_io_start_write(zio, rm->rm_row[i]);
		}
	} else {
		ASSERT(zio->io_type == ZIO_TYPE_READ);

		for (int i = 0; i < rm->rm_nrows; i++) {
			vdev_draid_io_start_read(zio, rm->rm_row[i]);
		}
	}

	zio_execute(zio);
}

/*
 * Complete an IO operation on a dRAID vdev.  The raidz logic can be applied