FUSE_ROOT_ID
fuse_node_new(fmp, FUSE_ROOT_ID, VDIR, &fmp->rfnp);
KKASSERT(fmp->rfnp->ino == FUSE_ROOT_ID);
fii = fuse_ipc_fill(fip, FUSE_INIT, FUSE_ROOT_ID, NULL);
fuse_ipc_fill(fip, FUSE_DESTROY, FUSE_ROOT_ID, NULL);
fuse_ipc_fill(fip, FUSE_STATFS, FUSE_ROOT_ID, cred);
fuse_ipc_fill(fip, FUSE_STATFS, FUSE_ROOT_ID, cred);