C++ (Cpp) tapdisk_vbd_is_last_image Exemples

Exemple #1

Fichier : tapdisk-vbd.c Projet : Kristoffer/blktap

static int
tapdisk_vbd_add_local_cache(td_vbd_t *vbd)
{
	td_image_t *cache, *parent;
	int err;

	parent = tapdisk_vbd_first_image(vbd);
	if (tapdisk_vbd_is_last_image(vbd, parent)) {
		DPRINTF("Single-image chain, nothing to cache");
		return 0;
	}

	cache = tapdisk_image_allocate(parent->name,
				       DISK_TYPE_LCACHE,
				       parent->flags);

	if (!cache)
		return -ENOMEM;

	/* try to load existing cache */
	err = td_load(cache);
	if (!err)
		goto done;

	cache->driver = tapdisk_driver_allocate(cache->type,
						cache->name,
						cache->flags);
	if (!cache->driver) {
		err = -ENOMEM;
		goto fail;
	}

	cache->driver->info = parent->driver->info;

	/* try to open new cache */
	err = td_open(cache);
	if (!err)
		goto done;

fail:
	tapdisk_image_free(cache);
	return err;

done:
	/* insert cache right above leaf image */
	list_add(&cache->next, &parent->next);

	DPRINTF("Added local_cache driver\n");
	return 0;
}

Exemple #2

Fichier : tapdisk-vbd.c Projet : CPFL/gxen

static int
tapdisk_vbd_validate_chain(td_vbd_t *vbd)
{
	int err;
	td_image_t *image, *parent, *tmp;

	DPRINTF("VBD CHAIN:\n");

	tapdisk_vbd_for_each_image(vbd, image, tmp) {
		DPRINTF("%s: %d\n", image->name, image->type);

		if (tapdisk_vbd_is_last_image(vbd, image))
			break;

		parent = tapdisk_vbd_next_image(image);
		err    = td_validate_parent(image, parent);
		if (err)
			return err;
	}