This option makes it possible to programatically bind sockets to netdevices. With the help of this option sockets of VRF unaware applications could be distributed between multiple VRFs with an eBPF program. This lets the applications benefit from multiple possible routes.
v2: - splitting up the patch to three parts - lock_sk parameter for optional locking in sock_bindtoindex - Stanislav Fomichev - testing the SO_BINDTODEVICE option - Andrii Nakryiko Ferenc Fejes (3): net: Make locking in sock_bindtoindex optional bpf: Allow SO_BINDTODEVICE opt in bpf_setsockopt selftests/bpf: Add test for SO_BINDTODEVICE opt of bpf_setsockopt include/net/sock.h | 2 +- net/core/filter.c | 27 ++++++++++++++- net/core/sock.c | 10 +++--- net/ipv4/udp_tunnel.c | 2 +- net/ipv6/ip6_udp_tunnel.c | 2 +- .../selftests/bpf/progs/connect4_prog.c | 33 +++++++++++++++++++ 6 files changed, 68 insertions(+), 8 deletions(-) -- 2.17.1
