[libvirt] [PATCH v3] leaseshelper: improvements to support all events

[Nehal J Wani]

On Mon, Aug 11, 2014 at 1:14 AM, Nehal J Wani <nehaljw.kkd1 at gmail.com> wrote:
> On Mon, Aug 4, 2014 at 1:29 PM, Nehal J Wani <nehaljw.kkd1 at gmail.com> wrote:
>>
>> This patch enables the helper program to detect event(s) triggered when there
>> is a change in lease length or expiry and client-id. This transfers complete
>> control of leases database to libvirt and obsoletes use of the lease database
>> file (<network-name>.leases). That file will not be created, read, or written.
>> This is achieved by adding the option --leasefile-ro to dnsmasq and passing a
>> custom env var to leaseshelper, which helps us map events related to leases
>> with their corresponding network bridges, no matter what the event be.
>>
>> Also, this requires the addition of a new non-lease entry in our custom lease
>> database: "server-duid". It is required to identify a DHCPv6 server.
>>
>> Now that dnsmasq doesn't maintain its own leases database, it relies on our
>> helper program to tell it about previous leases and server duid. Thus, this
>> patch makes our leases program honor an extra action: "init", in which it sends
>> the known info in a particular format to dnsmasq by printing it to stdout.
>>
>> ---
>>
>>  This is compatible with libvirt 1.2.6 as only additions have been
>>  introduced, and the old leases file (*.status) will still be supported.
>>
>>  v3: * Add server-duid as an entry in the lease object for every ipv6 lease.
>>      * Remove unnecessary variables and double copies.
>>      * Take value from DNSMASQ_OLD_HOSTNAME if hostname is not known.
>>
>>  v2: http://www.redhat.com/archives/libvir-list/2014-July/msg01109.html
>>
>>  v1: https://www.redhat.com/archives/libvir-list/2014-July/msg00568.html
>>
>>  src/network/bridge_driver.c |   3 +
>>  src/network/leaseshelper.c  | 132 +++++++++++++++++++++++++++++++++++---------
>>  2 files changed, 109 insertions(+), 26 deletions(-)
>>
>> diff --git a/src/network/bridge_driver.c b/src/network/bridge_driver.c
>> index 965fdec..b578b3a 100644
>> --- a/src/network/bridge_driver.c
>> +++ b/src/network/bridge_driver.c
>
> Ping!

Ping!

-- 
Nehal J Wani