Re: [libvirt] [for 1.2.6] Redundancy of virNetworkGetDHCPLeases and virNetworkGetDHCPLeasesForMAC

On Thu, Jun 26, 2014 at 4:58 PM, Peter Krempa <pkrempa(a)redhat.com&gt; wrote: > Hi, > > when reviewing the patch to add python bindings for the said APIs it > occurred to me that the two APIs are so close in their prototypes and > way of functioning that we could actually merge them into one. > > Both of those return a list of lease structures and the only difference > is the presence of the @mac argument. > > We could unify those two APIs into one with the following signature: > > int > virNetworkGetDHCPLeases(virNetworkPtr network, > const char *mac, > virNetworkDHCPLeasePtr **leases, > unsigned int flags) > > And tweak the semantics of @mac where when the user passes NULL we'd > return the complete unfiltered list. > > This would simplify our API and also the python bindings. > > If we decide this is a good idea (in time for the release) I'll post > patches to flesh out the redundant parts. > > Peter > A long long while ago, there was already a discussion on this References: (i) http://www.redhat.com/archives/libvir-list/2013-July/msg01609.html (ii) http://www.redhat.com/archives/libvir-list/2013-July/msg01623.html (iii) http://www.redhat.com/archives/libvir-list/2013-July/msg01624.html For TL;DR: Message 1: At a conceptual level, what you're after here is a list of all the IP, mac address mappings of the virtual network. This information is useful even outside the context of the hypervisor driver method you're working on. So we should create formal APIs for exposing this, something like: virNetworkGetDHCPLeases(virNetworkPtr network, virNetworkDHCPLeasePtr *leases, unsigned int nleases); And/or this virNetworkGetDHCPLeaseForMAC(virNetworkPtr network, unsigned char *macaddr, virNetworkDHCPLeasePtr lease); and a corresponding 'virsh net-dhcp-leases <netname>' command