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