def allocate_mac_address(self, context, net_id, port_id, reuse_after,
mac_address=None,
use_forbidden_mac_range=False, **kwargs):
if mac_address:
mac_address = netaddr.EUI(mac_address).value
kwargs.update({"network_id": net_id, "port_id": port_id,
"mac_address": mac_address,
"use_forbidden_mac_range": use_forbidden_mac_range})
LOG.info(("Attempting to allocate a new MAC address "
"[{0}]").format(utils.pretty_kwargs(**kwargs)))
for retry in xrange(CONF.QUARK.mac_address_retry_max):
LOG.info("Attemping to reallocate deallocated MAC (step 1 of 3),"
" attempt {0} of {1}".format(
retry + 1, CONF.QUARK.mac_address_retry_max))
try:
with context.session.begin():
transaction = db_api.transaction_create(context)
update_kwargs = {
"deallocated": False,
"deallocated_at": None,
"transaction_id": transaction.id
}
filter_kwargs = {
"deallocated": True,
}
if mac_address is not None:
filter_kwargs["address"] = mac_address
if reuse_after is not None:
filter_kwargs["reuse_after"] = reuse_after
elevated = context.elevated()
result = db_api.mac_address_reallocate(
elevated, update_kwargs, **filter_kwargs)
if not result:
break
reallocated_mac = db_api.mac_address_reallocate_find(
elevated, transaction.id)
if reallocated_mac:
dealloc = netaddr.EUI(reallocated_mac["address"])
LOG.info("Found a suitable deallocated MAC {0}".format(
str(dealloc)))
LOG.info("MAC assignment for port ID {0} completed "
"with address {1}".format(port_id, dealloc))
return reallocated_mac
except Exception:
LOG.exception("Error in mac reallocate...")
continue
LOG.info("Couldn't find a suitable deallocated MAC, attempting "
"to create a new one")
# This could fail if a large chunk of MACs were chosen explicitly,
# but under concurrent load enough MAC creates should iterate without
# any given thread exhausting its retry count.
for retry in xrange(CONF.QUARK.mac_address_retry_max):
LOG.info("Attemping to find a range to create a new MAC in "
"(step 2 of 3), attempt {0} of {1}".format(
retry + 1, CONF.QUARK.mac_address_retry_max))
next_address = None
with context.session.begin():
try:
fn = db_api.mac_address_range_find_allocation_counts
mac_range = \
fn(context, address=mac_address,
use_forbidden_mac_range=use_forbidden_mac_range)
if not mac_range:
LOG.info("No MAC ranges could be found given "
"the criteria")
break
rng, addr_count = mac_range
LOG.info("Found a MAC range {0}".format(rng["cidr"]))
last = rng["last_address"]
first = rng["first_address"]
if (last - first + 1) <= addr_count:
# Somehow, the range got filled up without us
# knowing, so set the next_auto_assign to be -1
# so we never try to create new ones
# in this range
db_api.mac_range_update_set_full(context, rng)
LOG.info("MAC range {0} is full".format(rng["cidr"]))
continue
if mac_address:
next_address = mac_address
else:
next_address = rng["next_auto_assign_mac"]
if next_address + 1 > rng["last_address"]:
db_api.mac_range_update_set_full(context, rng)
else:
db_api.mac_range_update_next_auto_assign_mac(
context, rng)
context.session.refresh(rng)
except Exception:
LOG.exception("Error in updating mac range")
continue
# Based on the above, this should only fail if a MAC was
# was explicitly chosen at some point. As such, fall through
# here and get in line for a new MAC address to try
try:
mac_readable = str(netaddr.EUI(next_address))
LOG.info("Attempting to create new MAC {0} "
"(step 3 of 3)".format(mac_readable))
with context.session.begin():
address = db_api.mac_address_create(
context, address=next_address,
mac_address_range_id=rng["id"])
LOG.info("MAC assignment for port ID {0} completed with "
"address {1}".format(port_id, mac_readable))
return address
except Exception:
LOG.info("Failed to create new MAC {0}".format(mac_readable))
LOG.exception("Error in creating mac. MAC possibly duplicate")
continue
raise n_exc_ext.MacAddressGenerationFailure(net_id=net_id)
def allocate_mac_address(self, context, net_id, port_id, reuse_after,
mac_address=None,
use_forbidden_mac_range=False):
if mac_address:
mac_address = netaddr.EUI(mac_address).value
kwargs = {"network_id": net_id, "port_id": port_id,
"mac_address": mac_address,
"use_forbidden_mac_range": use_forbidden_mac_range}
LOG.info(("Attempting to allocate a new MAC address "
"[{0}]").format(utils.pretty_kwargs(**kwargs)))
for retry in xrange(CONF.QUARK.mac_address_retry_max):
LOG.info("Attemping to reallocate deallocated MAC (step 1 of 3),"
" attempt {0} of {1}".format(
retry + 1, CONF.QUARK.mac_address_retry_max))
try:
with context.session.begin():
transaction = db_api.transaction_create(context)
update_kwargs = {
"deallocated": False,
"deallocated_at": None,
"transaction_id": transaction.id
}
filter_kwargs = {
"reuse_after": reuse_after,
"deallocated": True,
"address": mac_address
}
elevated = context.elevated()
result = db_api.mac_address_reallocate(
elevated, update_kwargs, **filter_kwargs)
if not result:
break
reallocated_mac = db_api.mac_address_reallocate_find(
elevated, transaction.id)
if reallocated_mac:
dealloc = netaddr.EUI(reallocated_mac["address"])
LOG.info("Found a suitable deallocated MAC {0}".format(
str(dealloc)))
LOG.info("MAC assignment for port ID {0} completed "
"with address {1}".format(port_id, dealloc))
return reallocated_mac
except Exception:
LOG.exception("Error in mac reallocate...")
continue
LOG.info("Couldn't find a suitable deallocated MAC, attempting "
"to create a new one")
# This could fail if a large chunk of MACs were chosen explicitly,
# but under concurrent load enough MAC creates should iterate without
# any given thread exhausting its retry count.
for retry in xrange(CONF.QUARK.mac_address_retry_max):
LOG.info("Attemping to find a range to create a new MAC in "
"(step 2 of 3), attempt {0} of {1}".format(
retry + 1, CONF.QUARK.mac_address_retry_max))
next_address = None
with context.session.begin():
try:
fn = db_api.mac_address_range_find_allocation_counts
mac_range = \
fn(context, address=mac_address,
use_forbidden_mac_range=use_forbidden_mac_range)
if not mac_range:
LOG.info("No MAC ranges could be found given "
"the criteria")
break
rng, addr_count = mac_range
LOG.info("Found a MAC range {0}".format(rng["cidr"]))
last = rng["last_address"]
first = rng["first_address"]
if (last - first + 1) <= addr_count:
# Somehow, the range got filled up without us
# knowing, so set the next_auto_assign to be -1
# so we never try to create new ones
# in this range
db_api.mac_range_update_set_full(context, rng)
LOG.info("MAC range {0} is full".format(rng["cidr"]))
continue
if mac_address:
next_address = mac_address
else:
next_address = rng["next_auto_assign_mac"]
if next_address + 1 > rng["last_address"]:
db_api.mac_range_update_set_full(context, rng)
else:
db_api.mac_range_update_next_auto_assign_mac(
context, rng)
context.session.refresh(rng)
except Exception:
LOG.exception("Error in updating mac range")
continue
# Based on the above, this should only fail if a MAC was
# was explicitly chosen at some point. As such, fall through
# here and get in line for a new MAC address to try
try:
mac_readable = str(netaddr.EUI(next_address))
LOG.info("Attempting to create new MAC {0} "
"(step 3 of 3)".format(mac_readable))
with context.session.begin():
address = db_api.mac_address_create(
context, address=next_address,
mac_address_range_id=rng["id"])
LOG.info("MAC assignment for port ID {0} completed with "
"address {1}".format(port_id, mac_readable))
return address
except Exception:
LOG.info("Failed to create new MAC {0}".format(mac_readable))
LOG.exception("Error in creating mac. MAC possibly duplicate")
continue
raise exceptions.MacAddressGenerationFailure(net_id=net_id)