Function arc_alloc_compressed_buf

freebsd/contrib/openzfs/module/zfs/arc.c:3645–3675

* Allocate a compressed buf in the same manner as arc_alloc_buf. Don't use this * for bufs containing metadata. */

 * for bufs containing metadata.
 */
arc_buf_t *
arc_alloc_compressed_buf(spa_t *spa, void *tag, uint64_t psize, uint64_t lsize,
    enum zio_compress compression_type, uint8_t complevel)
{
	ASSERT3U(lsize, >, 0);
	ASSERT3U(lsize, >=, psize);
	ASSERT3U(compression_type, >, ZIO_COMPRESS_OFF);
	ASSERT3U(compression_type, <, ZIO_COMPRESS_FUNCTIONS);

	arc_buf_hdr_t *hdr = arc_hdr_alloc(spa_load_guid(spa), psize, lsize,
	    B_FALSE, compression_type, complevel, ARC_BUFC_DATA, B_FALSE);

	arc_buf_t *buf = NULL;
	VERIFY0(arc_buf_alloc_impl(hdr, spa, NULL, tag, B_FALSE,
	    B_TRUE, B_FALSE, B_FALSE, &buf));
	arc_buf_thaw(buf);
	ASSERT3P(hdr->b_l1hdr.b_freeze_cksum, ==, NULL);

	if (!arc_buf_is_shared(buf)) {
		/*
		 * To ensure that the hdr has the correct data in it if we call
		 * arc_untransform() on this buf before it's been written to
		 * disk, it's easiest if we just set up sharing between the
		 * buf and the hdr.
		 */
		arc_hdr_free_abd(hdr, B_FALSE);
		arc_share_buf(hdr, buf);
	}

	return (buf);
}

arc_buf_t *
arc_alloc_raw_buf(spa_t *spa, void *tag, uint64_t dsobj, boolean_t byteorder,