On Tue, Mar 16, 2021 at 01:27:46PM +0000, Sidong Yang wrote:

When user assign qgroup with qgroup id that is too big to exceeds
range and invade level value, and it works without any error. but
this action would be make undefined error. this code make sure that
qgroup id doesn't exceed range(0 ~ 2^48-1).

Should the level be also validate? The function parse_qgroupid does not
do full validation, so eg 0//0 would be parsed as a path and not as a
typo, level larger than 64K will be silently clamped.