[PATCH] xfrm: fix tunnel model fragmentation behavior

[Steffen Klassert]

On Tue, Feb 22, 2022 at 10:18:04AM +0800, Lina Wang wrote:
> On Mon, 2022-02-21 at 12:04 +0100, Steffen Klassert wrote:
> > On Mon, Feb 21, 2022 at 01:16:48PM +0800, Lina Wang wrote:
> > > in tunnel mode, if outer interface(ipv4) is less, it is easily to
> We have two commits in the ipsec tree that address a very similar
> > issue. That is:
> > 
> > commit 6596a0229541270fb8d38d989f91b78838e5e9da
> > xfrm: fix MTU regression
> > 
> > and
> > 
> > commit a6d95c5a628a09be129f25d5663a7e9db8261f51
> > Revert "xfrm: xfrm_state_mtu should return at least 1280 for ipv6"
> > 
> > Can you please doublecheck that the issue you are fixing still
> > exist in the ipsec tree?
> 
> Yes, I know the two patches, which didnot help for my scenary. Whatever 
> commit a6d95c5a62 exist or not, there still is double fragment issue. From
> commit 6596a022's mail thread, owner has met double fragment issue, I am 
> not sure if it is the same with mine.

Thanks for the doublecking this!