On Tue, Nov 23, 2021 at 3:06 PM Maciej Żenczykowski <zenczykowski@xxxxxxxxx> wrote: > > From: Maciej Żenczykowski <maze@xxxxxxxxxx> > > IPv4 fragments (20 byte IPv4 header) need to be translated to/from > IPv6 fragments (40 byte IPv6 header with additional 8 byte IPv6 > fragmentation header). > > This allows this to be done by adding an extra flag BPF_F_IPV6_FRAGMENT > to bpf_skb_change_proto(). > > I think this is already technically achievable via the use of > bpf_skb_adjust_room() which was added in v4.12 commit 2be7e212d541, > but this is far easier to use and eliminates the need to call two > helper functions, so it's also faster. > > Cc: Lorenzo Colitti <lorenzo@xxxxxxxxxx> > Signed-off-by: Maciej Żenczykowski <maze@xxxxxxxxxx> Please add a selftest to exercise the new flag. Thanks, Song
