commit 2984b6dabee5b249f0c5fa8203fe5d46be873a43
author Nam Nguyen Hoai <namnh@vn.fujitsu.com> Fri Aug 05 09:46:43 2016 +0700
committer Nam Nguyen Hoai <namnh@vn.fujitsu.com> Wed Aug 24 14:27:48 2016 +0000
tree 8ec4f3c297225ce7516ef121ff461782caa771bf
parent d011340aec1dd8eefbaaba50670df13652fa9cd5

Using revision_number to ensure no overlap in *one* network

This patch uses revision_number in database. When creating
a subnet in a network, the revision_number of the network
will be increased. That will prevent overlapping CIDR
(overlapping CIDR means some subnets' cidrs are overlapping)
on *one* network.

Basically, in case of concurrent requests creating subnets
on *one* network, only one request successes, other requests
needs retrying request.

Change-Id: Id6548535075bed87a4b36e1462db546ab9163f29
Closes-Bug: #1532695