Re: [Libguestfs] [PATCH nbdkit 0/4] Reflection plugin, peer name.

On 9/15/19 9:55 AM, Richard W.M. Jones wrote: >The fun plugin is a reflection plugin which "reflects" client >information back to the client. We have a few fun plugins like this >(hello there, nbdkit-full-plugin) and normally I would push these >without review, but in this particular case there's a specific danger >that sending back data under control of the client might lead to a >security problem. I _believe_ I have avoided that pitfall, but my >belief isn't as good as having experts review it :-) > A thought for another potentially fun mode: what if the reflection plugin reports back connection uptime? The disk would be a fixed-width size (maybe 8 bytes: uint32_t for seconds, uint32_t for nanoseconds), where the contents are always changing to record the delta in time between any given request and when the connection was first created (in this mode, multi-conn and caching contents is actually quite wrong). Back-to-back commands can in turn be used to measure connection latencies.