This patchset attempts to add two new arguments into the hookpoint cong_control in tcp_congestion_ops. The new arguments are inherited from the caller tcp_cong_control and can be used by any bpf cc prog that implements its own logic inside this hookpoint. Please review. Thanks a lot! Changelog ===== v2->v3: - Fixed the broken selftest caused by the new arguments. - Renamed the selftest file name and bpf prog name. v1->v2: - Split the patchset into 3 separate patches. - Added highlights in the selftest prog. - Removed the dependency on bpf_tcp_helpers.h. Miao Xu (3): tcp: Add new args for cong_control in tcp_congestion_ops bpf: tcp: Allow to write tp->snd_cwnd_stamp in bpf_tcp_ca selftests/bpf: Add test for the use of new args in cong_control include/net/tcp.h | 2 +- net/ipv4/bpf_tcp_ca.c | 6 +- net/ipv4/tcp_bbr.c | 2 +- net/ipv4/tcp_input.c | 2 +- .../selftests/bpf/progs/bpf_cc_cubic.c | 206 ++++++++++++++++++ .../selftests/bpf/progs/bpf_tracing_net.h | 10 + .../selftests/bpf/progs/tcp_ca_kfunc.c | 6 +- 7 files changed, 227 insertions(+), 7 deletions(-) create mode 100644 tools/testing/selftests/bpf/progs/bpf_cc_cubic.c -- 2.43.0
