tree 156f7442bb4b41e804aca666d87690af45fb2ac7
parent 275e7e20aa8599719729f8ef4c09c9bfc4895642
author Trond Myklebust <Trond.Myklebust@netapp.com> 1351551740 -0400
committer Trond Myklebust <Trond.Myklebust@netapp.com> 1354750250 +0100

NFSv4: Clean up handling of privileged operations

Privileged rpc calls are those that are run by the state recovery thread,
in cases where we're trying to recover the system after a server reboot
or a network partition. In those cases, we want to fence off all other
rpc calls (see nfs4_begin_drain_session()) so that they don't end up
using stateids or clientids that are in the process of being recovered.

Prior to this patch, we had to set up special callback functions in
order to declare an rpc call as being privileged.
By adding a new field to the sequence arguments, this patch simplifies
things considerably, and allows us to declare the rpc call as privileged
before it is run.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>