rem: devfs_create(fs_cookie _fs, fs_vnode _dir, const char *name, int omode, int perms, file_cookie *_cookie, vnode_id *new_vnid)
add: devfs_create(fs_volume _fs, fs_vnode _dir, const char *name, int omode, int perms, fs_cookie *_cookie, vnode_id *new_vnid)
context: devfs_create(fs_cookie _fs, fs_vnode _dir, const char *name, int omode, int perms, file_cookie *_cookie, vnode_id *new_vnid){	return EROFS;}