[bpf-next,v5,0/4] bpf: allow any port in bpf_bind helper

We want to have a tighter control on what ports we bind to in
the BPF_CGROUP_INET{4,6}_CONNECT hooks even if it means
connect() becomes slightly more expensive.

The series goes like this:
1. selftests: move existing helpers that make it easy to create
   listener threads into common test_progs part
2. selftests: move some common functionality into network_helpers
3. do small refactoring of __inet{,6}_bind() flags to make it easy
   to extend them with the additional flags
4. remove the restriction on port being zero in bpf_bind() helper;
   add new bind flag to prevent POST_BIND hook from being called

Acked-by: Andrey Ignatov <rdna@fb.com>
Acked-by: Martin KaFai Lau <kafai@fb.com>

Stanislav Fomichev (4):
  selftests/bpf: generalize helpers to control background listener
  selftests/bpf: move existing common networking parts into
    network_helpers
  net: refactor arguments of inet{,6}_bind
  bpf: allow any port in bpf_bind helper

 include/net/inet_common.h                     |   8 +-
 include/net/ipv6_stubs.h                      |   2 +-
 include/uapi/linux/bpf.h                      |   9 +-
 net/core/filter.c                             |  16 ++-
 net/ipv4/af_inet.c                            |  20 +--
 net/ipv6/af_inet6.c                           |  22 ++--
 tools/include/uapi/linux/bpf.h                |   9 +-
 tools/testing/selftests/bpf/Makefile          |   2 +-
 tools/testing/selftests/bpf/network_helpers.c | 110 +++++++++++++++++
 tools/testing/selftests/bpf/network_helpers.h |  39 ++++++
 .../bpf/prog_tests/connect_force_port.c       | 115 +++++++++++++++++
 .../selftests/bpf/prog_tests/fexit_bpf2bpf.c  |   1 +
 .../selftests/bpf/prog_tests/flow_dissector.c |   1 +
 .../prog_tests/flow_dissector_load_bytes.c    |   1 +
 .../selftests/bpf/prog_tests/global_data.c    |   1 +
 .../selftests/bpf/prog_tests/kfree_skb.c      |   1 +
 .../selftests/bpf/prog_tests/l4lb_all.c       |   1 +
 .../selftests/bpf/prog_tests/map_lock.c       |  14 +++
 .../selftests/bpf/prog_tests/pkt_access.c     |   1 +
 .../selftests/bpf/prog_tests/pkt_md_access.c  |   1 +
 .../selftests/bpf/prog_tests/prog_run_xattr.c |   1 +
 .../bpf/prog_tests/queue_stack_map.c          |   1 +
 .../selftests/bpf/prog_tests/signal_pending.c |   1 +
 .../selftests/bpf/prog_tests/skb_ctx.c        |   1 +
 .../selftests/bpf/prog_tests/spinlock.c       |  14 +++
 .../selftests/bpf/prog_tests/tcp_rtt.c        | 116 +-----------------
 tools/testing/selftests/bpf/prog_tests/xdp.c  |   1 +
 .../bpf/prog_tests/xdp_adjust_tail.c          |   1 +
 .../selftests/bpf/prog_tests/xdp_bpf2bpf.c    |   1 +
 .../selftests/bpf/prog_tests/xdp_noinline.c   |   1 +
 .../selftests/bpf/progs/connect_force_port4.c |  28 +++++
 .../selftests/bpf/progs/connect_force_port6.c |  28 +++++
 tools/testing/selftests/bpf/test_progs.c      |  30 -----
 tools/testing/selftests/bpf/test_progs.h      |  23 ----
 34 files changed, 417 insertions(+), 204 deletions(-)
 create mode 100644 tools/testing/selftests/bpf/network_helpers.c
 create mode 100644 tools/testing/selftests/bpf/network_helpers.h
 create mode 100644 tools/testing/selftests/bpf/prog_tests/connect_force_port.c
 create mode 100644 tools/testing/selftests/bpf/progs/connect_force_port4.c
 create mode 100644 tools/testing/selftests/bpf/progs/connect_force_port6.c

On 5/8/20 7:46 PM, Stanislav Fomichev wrote:
> We want to have a tighter control on what ports we bind to in
> the BPF_CGROUP_INET{4,6}_CONNECT hooks even if it means
> connect() becomes slightly more expensive.
> 
> The series goes like this:
> 1. selftests: move existing helpers that make it easy to create
>     listener threads into common test_progs part
> 2. selftests: move some common functionality into network_helpers
> 3. do small refactoring of __inet{,6}_bind() flags to make it easy
>     to extend them with the additional flags
> 4. remove the restriction on port being zero in bpf_bind() helper;
>     add new bind flag to prevent POST_BIND hook from being called
> 
> Acked-by: Andrey Ignatov <rdna@fb.com>
> Acked-by: Martin KaFai Lau <kafai@fb.com>
> 
> Stanislav Fomichev (4):
>    selftests/bpf: generalize helpers to control background listener
>    selftests/bpf: move existing common networking parts into
>      network_helpers
>    net: refactor arguments of inet{,6}_bind
>    bpf: allow any port in bpf_bind helper
> 

Applied, thanks!