Re: [PATCH ghak90 V8 07/16] audit: add contid support for signalling the audit daemon

This is a bit of a thread-hijack, and for that I apologize, but another thought crossed my mind while thinking about this issue further ... Once we support multiple auditd instances, including the necessary record routing and duplication/multiple-sends (the host always sees *everything*), we will likely need to find a way to "trim" the audit container ID (ACID) lists we send in the records. The auditd instance running on the host/initns will always see everything, so it will want the full container ACID list; however an auditd instance running inside a container really should only see the ACIDs of any child containers.

For example, imagine a system where the host has containers 1 and 2, each running an auditd instance. Inside container 1 there are containers A and B. Inside container 2 there are containers Y and Z. If an audit event is generated in container Z, I would expect the host's auditd to see a ACID list of "1,Z" but container 1's auditd should only see an ACID list of "Z". The auditd running in container 2 should not see the record at all (that will be relatively straightforward). Does that make sense? Do we have the record formats properly designed to handle this without too much problem (I'm not entirely sure we do)?

paul moore