[PATCH 0/2] Allow BPF TCP CCs to write app_limited

[Yixin Shen <bobankhshen@gmail.com>]

This series allow BPF TCP CCs to write app_limited of struct
tcp_sock. A built-in CC or one from a kernel module is already 
able to write to app_limited of struct tcp_sock. Until now,
a BPF CC doesn't have write access to this member of struct
tcp_sock.

Yixin Shen (2):
  bpf: allow a TCP CC to write app_limited
  selftests/bpf: test a BPF CC writing app_limited

 net/ipv4/bpf_tcp_ca.c                         |  3 +
 .../selftests/bpf/prog_tests/bpf_tcp_ca.c     | 19 +++++
 .../bpf/progs/tcp_ca_write_app_limited.c      | 71 +++++++++++++++++++
 3 files changed, 93 insertions(+)
 create mode 100644 tools/testing/selftests/bpf/progs/tcp_ca_write_app_limited.c

-- 
2.25.1