In this series, we mainly add some skb drop reasons to the input path of ip routing, and we make the following functions return drop reasons: fib_validate_source() ip_route_input_mc() ip_mc_validate_source() ip_route_input_slow() ip_route_input_rcu() ip_route_input_noref() ip_route_input() ip_mkroute_input() __mkroute_input() ip_route_use_hint() And following new skb drop reasons are added: SKB_DROP_REASON_IP_LOCAL_SOURCE SKB_DROP_REASON_IP_INVALID_SOURCE SKB_DROP_REASON_IP_LOCALNET SKB_DROP_REASON_IP_INVALID_DEST Changes since v4: - in the 6th patch: remove the unneeded "else" in ip_expire() - in the 8th patch: delete the unneeded comment in __mkroute_input() - in the 9th patch: replace "return 0" with "return SKB_NOT_DROPPED_YET" in ip_route_use_hint() Changes since v3: - don't refactor fib_validate_source/__fib_validate_source, and introduce a wrapper for fib_validate_source() instead in the 1st patch. - some small adjustment in the 4-7 patches Changes since v2: - refactor fib_validate_source and __fib_validate_source to make fib_validate_source return drop reasons - add the 9th and 10th patches to make this series cover the input route code path Changes since v1: - make ip_route_input_noref/ip_route_input_rcu/ip_route_input_slow return drop reasons, instead of passing a local variable to their function arguments. Menglong Dong (9): net: ip: make fib_validate_source() support drop reasons net: ip: make ip_route_input_mc() return drop reason net: ip: make ip_mc_validate_source() return drop reason net: ip: make ip_route_input_slow() return drop reasons net: ip: make ip_route_input_rcu() return drop reasons net: ip: make ip_route_input_noref() return drop reasons net: ip: make ip_route_input() return drop reasons net: ip: make ip_mkroute_input/__mkroute_input return drop reasons net: ip: make ip_route_use_hint() return drop reasons include/net/dropreason-core.h | 26 ++++ include/net/ip_fib.h | 12 ++ include/net/route.h | 34 ++--- net/bridge/br_netfilter_hooks.c | 11 +- net/core/lwt_bpf.c | 6 +- net/ipv4/fib_frontend.c | 17 ++- net/ipv4/icmp.c | 2 +- net/ipv4/ip_fragment.c | 11 +- net/ipv4/ip_input.c | 20 ++- net/ipv4/ip_options.c | 2 +- net/ipv4/route.c | 211 ++++++++++++++++++-------------- net/ipv6/seg6_local.c | 14 +-- 12 files changed, 225 insertions(+), 141 deletions(-) -- 2.39.5
