Exemplo n.º 1
0
/* ARGSUSED */
static void
ready(zio_t *zio, arc_buf_t *abuf, void *arg)
{
	objset_impl_t *os = arg;
	blkptr_t *bp = os->os_rootbp;
	dnode_phys_t *dnp = &os->os_phys->os_meta_dnode;
	int i;

	ASSERT(bp == zio->io_bp);

	/*
	 * Update rootbp fill count.
	 */
	bp->blk_fill = 1;	/* count the meta-dnode */
	for (i = 0; i < dnp->dn_nblkptr; i++)
		bp->blk_fill += dnp->dn_blkptr[i].blk_fill;

	BP_SET_TYPE(bp, DMU_OT_OBJSET);
	BP_SET_LEVEL(bp, 0);

	/* We must do this after we've set the bp's type and level */
	if (!DVA_EQUAL(BP_IDENTITY(bp),
	    BP_IDENTITY(&zio->io_bp_orig))) {
		if (zio->io_bp_orig.blk_birth == os->os_synctx->tx_txg)
			(void) dsl_dataset_block_kill(os->os_dsl_dataset,
			    &zio->io_bp_orig, NULL, os->os_synctx);
		dsl_dataset_block_born(os->os_dsl_dataset, bp, os->os_synctx);
	}
}
Exemplo n.º 2
0
static void
free_blocks(dnode_t *dn, blkptr_t *bp, int num, dmu_tx_t *tx)
{
	dsl_dataset_t *ds = dn->dn_objset->os_dsl_dataset;
	uint64_t bytesfreed = 0;
	int i;

	dprintf("ds=%p obj=%llx num=%d\n", ds, dn->dn_object, num);

	for (i = 0; i < num; i++, bp++) {
		uint64_t lsize, lvl;
		dmu_object_type_t type;

		if (BP_IS_HOLE(bp))
			continue;

		bytesfreed += dsl_dataset_block_kill(ds, bp, tx, B_FALSE);
		ASSERT3U(bytesfreed, <=, DN_USED_BYTES(dn->dn_phys));

		/*
		 * Save some useful information on the holes being
		 * punched, including logical size, type, and indirection
		 * level. Retaining birth time enables detection of when
		 * holes are punched for reducing the number of free
		 * records transmitted during a zfs send.
		 */

		lsize = BP_GET_LSIZE(bp);
		type = BP_GET_TYPE(bp);
		lvl = BP_GET_LEVEL(bp);

		bzero(bp, sizeof (blkptr_t));

		if (spa_feature_is_active(dn->dn_objset->os_spa,
		    SPA_FEATURE_HOLE_BIRTH)) {
			BP_SET_LSIZE(bp, lsize);
			BP_SET_TYPE(bp, type);
			BP_SET_LEVEL(bp, lvl);
			BP_SET_BIRTH(bp, dmu_tx_get_txg(tx), 0);
		}
	}
	dnode_diduse_space(dn, -bytesfreed);
}