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

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 <redacted>

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