On 05/21/2018 06:08 PM, dsah...@kernel.org wrote:
> From: David Ahern <dsah...@gmail.com>
>
> Packets that exceed the egress MTU can not be forwarded in the fast path.
> Add IPv4 and IPv6 MTU helpers that take a FIB lookup result (versus the
> typical dst path) and add the calls to bpf_ipv{4,6}_fib_lookup.
>
> v2
> - add ip6_mtu_from_fib6 to ipv6_stub
> - only call the new MTU helpers for fib lookups in XDP path; skb
> path uses is_skb_forwardable to determine if the packet can be
> sent via the egress device from the FIB lookup
>
> David Ahern (3):
> net/ipv4: Add helper to return path MTU based on fib result
> net/ipv6: Add helper to return path MTU based on fib result
> bpf: Add mtu checking to FIB forwarding helper
>
> include/net/addrconf.h | 2 ++
> include/net/ip6_fib.h | 6 ++++++
> include/net/ip6_route.h | 3 +++
> include/net/ip_fib.h | 2 ++
> net/core/filter.c | 42 +++++++++++++++++++++++++++++++++++-------
> net/ipv4/route.c | 31 +++++++++++++++++++++++++++++++
> net/ipv6/addrconf_core.c | 8 ++++++++
> net/ipv6/af_inet6.c | 1 +
> net/ipv6/route.c | 48
> ++++++++++++++++++++++++++++++++++++++++++++++++
> 9 files changed, 136 insertions(+), 7 deletions(-)
Applied to bpf-next, thanks David!
