def _create_range(self, context, sa_range):
with context.session.begin(subtransactions=True):
# Validate any range-specific things, like min/max ids.
self._validate_range(context, sa_range)
# Check any existing ranges for this segment for collisions
segment_id = sa_range["segment_id"]
segment_type = sa_range["segment_type"]
filters = {"segment_id": segment_id,
"segment_type": segment_type}
existing_ranges = db_api.segment_allocation_range_find(
context, lock_mode=True, scope=db_api.ALL, **filters)
collides = self._check_collisions(
(sa_range["first_id"], sa_range["last_id"]),
[(r["first_id"], r["last_id"]) for r in existing_ranges])
if collides:
raise q_exc.InvalidSegmentAllocationRange(
msg=("The specified allocation collides with existing "
"range"))
return db_api.segment_allocation_range_create(
context, **sa_range)
def _validate_range(self, context, sa_range):
# Validate that the range is legal and makes sense.
try:
first_id = sa_range["first_id"]
last_id = sa_range["last_id"]
first_id, last_id = (int(first_id), int(last_id))
assert first_id >= self.VXLAN_MIN
assert last_id <= self.VXLAN_MAX
assert first_id <= last_id
except Exception:
raise q_exc.InvalidSegmentAllocationRange(
msg="The specified allocation range is invalid")