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.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/ip6_fib.h | 6 ++++++ include/net/ip6_route.h | 3 +++ include/net/ip_fib.h | 2 ++ net/core/filter.c | 10 ++++++++++ net/ipv4/route.c | 31 +++++++++++++++++++++++++++++++ net/ipv6/route.c | 48 ++++++++++++++++++++++++++++++++++++++++++++++++ 6 files changed, 100 insertions(+) -- 2.11.0
