Function vdev_trim_cb

freebsd/contrib/openzfs/module/zfs/vdev_trim.c:364–398

* The zio_done_func_t done callback for each manual TRIM issued. It is * responsible for updating the TRIM stats, reissuing failed TRIM I/Os, * and limiting the number of in flight TRIM I/Os. */

 * and limiting the number of in flight TRIM I/Os.
 */
static void
vdev_trim_cb(zio_t *zio)
{
	vdev_t *vd = zio->io_vd;

	mutex_enter(&vd->vdev_trim_io_lock);
	if (zio->io_error == ENXIO && !vdev_writeable(vd)) {
		/*
		 * The I/O failed because the vdev was unavailable; roll the
		 * last offset back. (This works because spa_sync waits on
		 * spa_txg_zio before it runs sync tasks.)
		 */
		uint64_t *offset =
		    &vd->vdev_trim_offset[zio->io_txg & TXG_MASK];
		*offset = MIN(*offset, zio->io_offset);
	} else {
		if (zio->io_error != 0) {
			vd->vdev_stat.vs_trim_errors++;
			spa_iostats_trim_add(vd->vdev_spa, TRIM_TYPE_MANUAL,
			    0, 0, 0, 0, 1, zio->io_orig_size);
		} else {
			spa_iostats_trim_add(vd->vdev_spa, TRIM_TYPE_MANUAL,
			    1, zio->io_orig_size, 0, 0, 0, 0);
		}

		vd->vdev_trim_bytes_done += zio->io_orig_size;
	}

	ASSERT3U(vd->vdev_trim_inflight[TRIM_TYPE_MANUAL], >, 0);
	vd->vdev_trim_inflight[TRIM_TYPE_MANUAL]--;
	cv_broadcast(&vd->vdev_trim_io_cv);
	mutex_exit(&vd->vdev_trim_io_lock);

	spa_config_exit(vd->vdev_spa, SCL_STATE_ALL, vd);
}

/*
 * The zio_done_func_t done callback for each automatic TRIM issued.  It