NFSV4ACE_WRITEDATA
if (mask & NFSV4ACE_WRITEDATA) {
mask &= ~NFSV4ACE_WRITEDATA;
acemask |= NFSV4ACE_WRITEDATA;
#define NFSV4ACE_WRITEMASK (NFSV4ACE_WRITEDATA | NFSV4ACE_APPENDDATA)