NFS_CAP_LAYOUTSTATS
server->caps |= NFS_CAP_LAYOUTSTATS | NFS_CAP_REBOOT_LAYOUTRETURN;
NFS_SERVER(inode)->caps &= ~NFS_CAP_LAYOUTSTATS;
| NFS_CAP_LAYOUTSTATS
if (!nfs_server_capable(inode, NFS_CAP_LAYOUTSTATS))