NFSNSF_NEEDLOCK
if (NFSD_VNET(nfsrv_stablefirst).nsf_flags & NFSNSF_NEEDLOCK)
NFSD_VNET(nfsrv_stablefirst).nsf_flags &= ~NFSNSF_NEEDLOCK;
(NFSNSF_GRACEOVER | NFSNSF_NEEDLOCK);
(NFSNSF_NEEDLOCK | NFSNSF_EXPIREDCLIENT);
(NFSNSF_GRACEOVER | NFSNSF_NEEDLOCK);
sf->nsf_flags = (NFSNSF_GRACEOVER | NFSNSF_NEEDLOCK);