コード例 #1
0
/*
 * Resize the cluster's physical storage allocation in-place.  This may
 * replace the cluster's chains.
 */
void
hammer2_cluster_resize(hammer2_trans_t *trans, hammer2_inode_t *ip,
		       hammer2_cluster_t *cparent, hammer2_cluster_t *cluster,
		       int nradix, int flags)
{
	int i;

	KKASSERT(cparent->pmp == cluster->pmp);		/* can be NULL */
	KKASSERT(cparent->nchains == cluster->nchains);

	cluster->focus = NULL;
	for (i = 0; i < cluster->nchains; ++i) {
		if (cluster->array[i]) {
			KKASSERT(cparent->array[i]);
			hammer2_chain_resize(trans, ip,
					     cparent->array[i],
					     &cluster->array[i],
					     nradix, flags);
			if (cluster->focus == NULL)
				cluster->focus = cluster->array[i];
		}
	}
}
コード例 #2
0
ファイル: hammer2_thread.c プロジェクト: wan721/DragonFlyBSD
/*
 * cparent is locked exclusively, with an extra ref, cluster is not locked.
 * Replace element [i] in the cluster.
 */
static
int
hammer2_sync_replace(hammer2_thread_t *thr,
		     hammer2_chain_t *parent, hammer2_chain_t *chain,
		     hammer2_tid_t mtid, int idx,
		     hammer2_chain_t *focus)
{
	int nradix;
	uint8_t otype;

#if HAMMER2_THREAD_DEBUG
	if (hammer2_debug & 1)
	kprintf("replace rec %p slave %d %d.%016jx mod=%016jx\n",
		chain,
		idx,
		focus->bref.type, focus->bref.key, mtid);
#endif
	hammer2_chain_unlock(chain);
	hammer2_chain_lock(chain, HAMMER2_RESOLVE_ALWAYS);
	if (chain->bytes != focus->bytes) {
		/* XXX what if compressed? */
		nradix = hammer2_getradix(chain->bytes);
		hammer2_chain_resize(NULL, parent, chain,
				     mtid, nradix, 0);
	}
	hammer2_chain_modify(chain, mtid, 0);
	otype = chain->bref.type;
	chain->bref.type = focus->bref.type;
	chain->bref.methods = focus->bref.methods;
	chain->bref.keybits = focus->bref.keybits;
	chain->bref.vradix = focus->bref.vradix;
	/* mirror_tid updated by flush */
	KKASSERT(chain->bref.modify_tid == mtid);
	chain->bref.flags = focus->bref.flags;
	/* key already present */
	/* check code will be recalculated */
	chain->error = 0;

	/*
	 * Copy data body.
	 */
	switch(chain->bref.type) {
	case HAMMER2_BREF_TYPE_INODE:
		if ((focus->data->ipdata.meta.op_flags &
		     HAMMER2_OPFLAG_DIRECTDATA) == 0) {
			/*
			 * If DIRECTDATA is transitioning to 0 or the old
			 * chain is not an inode we have to initialize
			 * the block table.
			 */
			if (otype != HAMMER2_BREF_TYPE_INODE ||
			    (chain->data->ipdata.meta.op_flags &
			     HAMMER2_OPFLAG_DIRECTDATA)) {
				kprintf("chain inode trans away from dd\n");
				bzero(&chain->data->ipdata.u,
				      sizeof(chain->data->ipdata.u));
			}
			bcopy(focus->data, chain->data,
			      offsetof(hammer2_inode_data_t, u));
			/* XXX setcheck on inode should not be needed */
			hammer2_chain_setcheck(chain, chain->data);
			break;
		}
		/* fall through */
	case HAMMER2_BREF_TYPE_DATA:
		bcopy(focus->data, chain->data, chain->bytes);
		hammer2_chain_setcheck(chain, chain->data);
		break;
	default:
		KKASSERT(0);
		break;
	}

	hammer2_chain_unlock(chain);
	hammer2_chain_lock(chain, HAMMER2_RESOLVE_SHARED |
				  HAMMER2_RESOLVE_MAYBE);

	return 0;
}