Re: [PATCH] net/ipv4/ip_fragment:fix missing Flags reserved bit set in iphdr

[Jakub Kicinski]

On Thu,  6 May 2021 22:59:05 +0800 meijusan wrote:
> ip frag with the iphdr flags reserved bit set,via router,ip frag reasm or
> fragment,causing the reserved bit is reset to zero.
> 
> Keep reserved bit set is not modified in ip frag  defrag or fragment.
> 
> Signed-off-by: meijusan <meijusan@xxxxxxx>

Could you please provide more background on why we'd want to do this?
Preferably with references to relevant (non-April Fools' Day) RFCs.