from ganeti import errors
+
+def _ComputeIpv4NumHosts(network_size):
+ """Derives the number of hosts in an IPv4 network from the size.
+
+ """
+ return 2 ** (32 - network_size)
+
+
IPV4_NETWORK_MIN_SIZE = 30
-IPV4_NETWORK_MIN_NUM_HOSTS = 2 ** (32 - IPV4_NETWORK_MIN_SIZE)
+# FIXME: This limit is for performance reasons. Remove when refactoring
+# for performance tuning was successful.
+IPV4_NETWORK_MAX_SIZE = 16
+IPV4_NETWORK_MIN_NUM_HOSTS = _ComputeIpv4NumHosts(IPV4_NETWORK_MIN_SIZE)
+IPV4_NETWORK_MAX_NUM_HOSTS = _ComputeIpv4NumHosts(IPV4_NETWORK_MAX_SIZE)
class AddressPool(object):
self.net = network
self.network = ipaddr.IPNetwork(self.net.network)
+ if self.network.numhosts > IPV4_NETWORK_MAX_NUM_HOSTS:
+ raise errors.AddressPoolError("A big network with %s host(s) is currently"
+ " not supported. please specify at most a"
+ " /%s network" %
+ (str(self.network.numhosts),
+ IPV4_NETWORK_MAX_SIZE))
+
if self.network.numhosts < IPV4_NETWORK_MIN_NUM_HOSTS:
raise errors.AddressPoolError("A network with only %s host(s) is too"
" small, please specify at least a /%s"