Function vdev_trim_ranges

freebsd/contrib/openzfs/module/zfs/vdev_trim.c:566–607

* Issues TRIM I/Os for all ranges in the provided ta->trim_tree range tree. * Additional parameters describing how the TRIM should be performed must * be set in the trim_args structure. See the trim_args definition for * additional information. */

 * additional information.
 */
static int
vdev_trim_ranges(trim_args_t *ta)
{
	vdev_t *vd = ta->trim_vdev;
	zfs_btree_t *t = &ta->trim_tree->rt_root;
	zfs_btree_index_t idx;
	uint64_t extent_bytes_max = ta->trim_extent_bytes_max;
	uint64_t extent_bytes_min = ta->trim_extent_bytes_min;
	spa_t *spa = vd->vdev_spa;

	ta->trim_start_time = gethrtime();
	ta->trim_bytes_done = 0;

	for (range_seg_t *rs = zfs_btree_first(t, &idx); rs != NULL;
	    rs = zfs_btree_next(t, &idx, &idx)) {
		uint64_t size = rs_get_end(rs, ta->trim_tree) - rs_get_start(rs,
		    ta->trim_tree);

		if (extent_bytes_min && size < extent_bytes_min) {
			spa_iostats_trim_add(spa, ta->trim_type,
			    0, 0, 1, size, 0, 0);
			continue;
		}

		/* Split range into legally-sized physical chunks */
		uint64_t writes_required = ((size - 1) / extent_bytes_max) + 1;

		for (uint64_t w = 0; w < writes_required; w++) {
			int error;

			error = vdev_trim_range(ta, VDEV_LABEL_START_SIZE +
			    rs_get_start(rs, ta->trim_tree) +
			    (w *extent_bytes_max), MIN(size -
			    (w * extent_bytes_max), extent_bytes_max));
			if (error != 0) {
				return (error);
			}
		}
	}

	return (0);
}

static void
vdev_trim_xlate_last_rs_end(void *arg, range_seg64_t *physical_rs)