Re: [Libvir] Proposal: Block device and network stats

Daniel P. Berrange wrote: >It is probably worthwhile though to >ensure that we design the APIs so that the structs are always allocated by >the internal driver and not the caller. This allows us to add more fields >at a later date if needed. Instead of the above, the caller has to pass in the size of the struct. Pros to passing in the struct & size: * New caller / old libvirt can be detected, rather than causing a segfault. * Caller is less likely to forget to free the struct (because it is mostly likely on their stack, or they explicitly malloc'd it).