Re: [nfsv4] "Courtesy locks"

[Rick Macklem <[e-mail]>]

> 
> For the Mac OS X NFSv4 client:
> 
> > C1) When you get NFS4ERR_EXPIRED, what happens?
> >
> >     a) Assume all locks associated with lease have been released
> >        that the client needs to create a new clientid?
> >     b) Assume that it means one or more locks have been lost and
> >        the client needs to determine what as gone and which are
> >        still valid.
> 
> (b)
> 
> Upon receipt of NFS4ERR_EXPIRED the client will enter recovery mode
> where we will attempt to reclaim all opens, all locks and delegated
> state (if we didn't have non-delegated state that already covered it)
> and drop/return any lingering delegations we had.

The FreeBSD8 server will only allow reclaim Ops during the grace
period right after a reboot. It will return NFS4ERR_NO_GRACE for
all reclaim Ops (Open with Claim_previous or Lock with the reclaim
flag true) received outside of this grace period.

Do other servers allow this? (I thought the above was required
behaviour?)

[good stuff snipped for brevity]

rick