Esempi in C++ (Cpp) per zvol_update_volsize

Esempio n. 1

File: zvol.c Progetto: alek-p/zfs

/*
 * Set ZFS_PROP_VOLSIZE set entry point.
 */
int
zvol_set_volsize(const char *name, uint64_t volsize)
{
	zvol_state_t *zv = NULL;
	objset_t *os = NULL;
	int error;
	dmu_object_info_t *doi;
	uint64_t readonly;
	boolean_t owned = B_FALSE;

	error = dsl_prop_get_integer(name,
	    zfs_prop_to_name(ZFS_PROP_READONLY), &readonly, NULL);
	if (error != 0)
		return (SET_ERROR(error));
	if (readonly)
		return (SET_ERROR(EROFS));

	mutex_enter(&zvol_state_lock);
	zv = zvol_find_by_name(name);

	if (zv == NULL || zv->zv_objset == NULL) {
		if ((error = dmu_objset_own(name, DMU_OST_ZVOL, B_FALSE,
		    FTAG, &os)) != 0) {
			mutex_exit(&zvol_state_lock);
			return (SET_ERROR(error));
		}
		owned = B_TRUE;
		if (zv != NULL)
			zv->zv_objset = os;
	} else {
		os = zv->zv_objset;
	}

	doi = kmem_alloc(sizeof (dmu_object_info_t), KM_SLEEP);

	if ((error = dmu_object_info(os, ZVOL_OBJ, doi)) ||
	    (error = zvol_check_volsize(volsize, doi->doi_data_block_size)))
		goto out;

	error = zvol_update_volsize(volsize, os);
	kmem_free(doi, sizeof (dmu_object_info_t));

	if (error == 0 && zv != NULL)
		error = zvol_update_live_volsize(zv, volsize);
out:
	if (owned) {
		dmu_objset_disown(os, FTAG);
		if (zv != NULL)
			zv->zv_objset = NULL;
	}
	mutex_exit(&zvol_state_lock);
	return (error);
}

Esempio n. 2

/*
 * Set ZFS_PROP_VOLSIZE set entry point.
 */
int
zvol_set_volsize(const char *name, uint64_t volsize)
{
	zvol_state_t *zv;
	dmu_object_info_t *doi;
	objset_t *os = NULL;
	uint64_t readonly;
	int error;

	mutex_enter(&zvol_state_lock);

	zv = zvol_find_by_name(name);
	if (zv == NULL) {
		error = ENXIO;
		goto out;
	}

	doi = kmem_alloc(sizeof(dmu_object_info_t), KM_SLEEP);

	error = dmu_objset_hold(name, FTAG, &os);
	if (error)
		goto out_doi;

	if ((error = dmu_object_info(os, ZVOL_OBJ, doi)) != 0 ||
	    (error = zvol_check_volsize(volsize,doi->doi_data_block_size)) != 0)
		goto out_doi;

	VERIFY(dsl_prop_get_integer(name, "readonly", &readonly, NULL) == 0);
	if (readonly) {
		error = EROFS;
		goto out_doi;
	}

	if (get_disk_ro(zv->zv_disk) || (zv->zv_flags & ZVOL_RDONLY)) {
		error = EROFS;
		goto out_doi;
	}

	error = zvol_update_volsize(zv, volsize, os);
out_doi:
	kmem_free(doi, sizeof(dmu_object_info_t));
out:
	if (os)
		dmu_objset_rele(os, FTAG);

	mutex_exit(&zvol_state_lock);

	return (error);
}