rem: rootfs_write_page(fs_cookie _fs, fs_vnode _v, iovecs *vecs, off_t pos)
add: rootfs_write_page(fs_volume _fs, fs_vnode _v, iovecs *vecs, off_t pos)
context: rootfs_write_page(fs_cookie _fs, fs_vnode _v, iovecs *vecs, off_t pos){	return EPERM;}