On Saturday 09 August 2008 1:08:40 pm Paul E. McKenney wrote: > On Sat, Aug 09, 2008 at 10:43:22AM -0400, Paul Moore wrote: > > NetLabel has always had a list of backpointers in the CIPSO DOI > > definition structure which pointed to the NetLabel LSM domain > > mapping structures which referenced the CIPSO DOI struct. The > > rationale for this was that when an administrator removed a CIPSO > > DOI from the system all of the associated NetLabel LSM domain > > mappings should be removed as well; a list of backpointers made > > this a simple operation. > > > > Unfortunately, while the backpointers did make the removal easier > > they were a bit of a mess from an implementation point of view > > which was making further development difficult. Since the removal > > of a CIPSO DOI is a realtively rare event it seems to make sense to > > remove this backpointer list as the optimization was hurting us > > more then it was helping. However, we still need to be able to > > track when a CIPSO DOI definition is being used so replace the > > backpointer list with a reference count. In order to preserve the > > current functionality of removing the associated LSM domain > > mappings when a CIPSO DOI is removed we walk the LSM domain mapping > > table, removing the relevant entries. > > Looks good from an RCU viewpoint! Great, thanks for all your help :) -- paul moore linux @ hp -- This message was distributed to subscribers of the selinux mailing list. If you no longer wish to subscribe, send mail to majordomo@xxxxxxxxxxxxx with the words "unsubscribe selinux" without quotes as the message.
