Function arc_read_done

freebsd/contrib/openzfs/module/zfs/arc.c:5658–5886

}

static void
arc_read_done(zio_t *zio)
{
	blkptr_t 	*bp = zio->io_bp;
	arc_buf_hdr_t	*hdr = zio->io_private;
	kmutex_t	*hash_lock = NULL;
	arc_callback_t	*callback_list;
	arc_callback_t	*acb;
	boolean_t	freeable = B_FALSE;

	/*
	 * The hdr was inserted into hash-table and removed from lists
	 * prior to starting I/O.  We should find this header, since
	 * it's in the hash table, and it should be legit since it's
	 * not possible to evict it during the I/O.  The only possible
	 * reason for it not to be found is if we were freed during the
	 * read.
	 */
	if (HDR_IN_HASH_TABLE(hdr)) {
		arc_buf_hdr_t *found;

		ASSERT3U(hdr->b_birth, ==, BP_PHYSICAL_BIRTH(zio->io_bp));
		ASSERT3U(hdr->b_dva.dva_word[0], ==,
		    BP_IDENTITY(zio->io_bp)->dva_word[0]);
		ASSERT3U(hdr->b_dva.dva_word[1], ==,
		    BP_IDENTITY(zio->io_bp)->dva_word[1]);

		found = buf_hash_find(hdr->b_spa, zio->io_bp, &hash_lock);

		ASSERT((found == hdr &&
		    DVA_EQUAL(&hdr->b_dva, BP_IDENTITY(zio->io_bp))) ||
		    (found == hdr && HDR_L2_READING(hdr)));
		ASSERT3P(hash_lock, !=, NULL);
	}

	if (BP_IS_PROTECTED(bp)) {
		hdr->b_crypt_hdr.b_ot = BP_GET_TYPE(bp);
		hdr->b_crypt_hdr.b_dsobj = zio->io_bookmark.zb_objset;
		zio_crypt_decode_params_bp(bp, hdr->b_crypt_hdr.b_salt,
		    hdr->b_crypt_hdr.b_iv);

		if (BP_GET_TYPE(bp) == DMU_OT_INTENT_LOG) {
			void *tmpbuf;

			tmpbuf = abd_borrow_buf_copy(zio->io_abd,
			    sizeof (zil_chain_t));
			zio_crypt_decode_mac_zil(tmpbuf,
			    hdr->b_crypt_hdr.b_mac);
			abd_return_buf(zio->io_abd, tmpbuf,
			    sizeof (zil_chain_t));
		} else {
			zio_crypt_decode_mac_bp(bp, hdr->b_crypt_hdr.b_mac);
		}
	}

	if (zio->io_error == 0) {
		/* byteswap if necessary */
		if (BP_SHOULD_BYTESWAP(zio->io_bp)) {