This patchset adds support for: - direct R or R/W access to many tcp_sock fields - passing up to 4 arguments to sock_ops BPF functions - tcp_sock field bpf_sock_ops_flags for controlling callbacks - optionally calling sock_ops BPF program when RTO fires - optionally calling sock_ops BPF program when packet is retransmitted - optionally calling sock_ops BPF program when TCP state changes - access to tclass and sk_txhash - new selftest
Signed-off-by: Lawrence Brakmo <bra...@fb.com> Consists of the following patches: [PATCH bpf 01/11] bpf: Make SOCK_OPS_GET_TCP size independent [PATCH bpf 02/11] bpf: Make SOCK_OPS_GET_TCP struct independent [PATCH bpf 03/11] bpf: Add write access to tcp_sock and sock fields [PATCH bpf 04/11] bpf: Support passing args to sock_ops bpf function [PATCH bpf 05/11] bpf: Adds field bpf_sock_ops_flags to tcp_sock [PATCH bpf 06/11] bpf: Add sock_ops RTO callback [PATCH bpf 07/11] bpf: Add support for reading sk_state and more [PATCH bpf 08/11] bpf: Add sock_ops R/W access to tclass & sk_txhash [PATCH bpf 09/11] bpf: Add BPF_SOCK_OPS_RETRANS_CB [PATCH bpf 10/11] bpf: Add BPF_SOCK_OPS_STATE_CB [PATCH bpf 11/11] bpf: add selftest for tcpbpf include/linux/filter.h | 4 + include/linux/tcp.h | 8 ++ include/net/tcp.h | 66 +++++++++- include/uapi/linux/bpf.h | 39 +++++- include/uapi/linux/tcp.h | 5 + net/core/filter.c | 221 ++++++++++++++++++++++++++++++-- net/ipv4/tcp.c | 4 +- net/ipv4/tcp_nv.c | 2 +- net/ipv4/tcp_output.c | 5 +- net/ipv4/tcp_timer.c | 9 ++ tools/include/uapi/linux/bpf.h | 45 ++++++- tools/testing/selftests/bpf/Makefile | 4 +- tools/testing/selftests/bpf/tcp_client.py | 52 ++++++++ tools/testing/selftests/bpf/tcp_server.py | 79 ++++++++++++ tools/testing/selftests/bpf/test_tcpbpf_kern.c | 125 ++++++++++++++++++ tools/testing/selftests/bpf/test_tcpbpf_user.c | 113 ++++++++++++++++ 16 files changed, 757 insertions(+), 24 deletions(-)
