[PATCH bpf-next 0/9] bpf: Add log support for tracing link_create

[Leon Hwang <leon.hwang@linux.dev>]

I'm adding syscall common attrs support for LINK_CREATE cmd.

This is the second series for the plan, that adds syscall common attrs
support for LINK_CREATE of tracing prog and cgroup prog.

BTW, address Andrii's review [1] in patch 5:
1. Change if (!OPTS_ZEROED(opts, iter_info_len)) to if
   (!OPTS_ZEROED(opts, log_opts)).
2. Add comment to iter_info and iter_info_len that they are
   deprecated, and use iter.info and iter.len instead.

Links:
[1] https://lore.kernel.org/bpf/CAEf4BzbW4zwL-9j8e2B6KNXVNwsfWyMSAo_RsGCqv-nu_yGhTg@mail.gmail.com/

Leon Hwang (9):
  bpf: Add log support for tracing link_create
  bpf: Add log support for tracing_multi link_create
  bpf: Add log support for iter link_create
  bpf: Add log support for cgroup prog link_create
  libbpf: Add log_opts support for BPF_TRACE_ITER
  selftests/bpf: Verify tracing link_create logs
  selftests/bpf: Verify tracing_multi link_create logs
  selftests/bpf: Verify iter link_create logs
  selftests/bpf: Verify cgroup prog link_create logs

 include/linux/bpf-cgroup.h                    |   7 +-
 include/linux/bpf.h                           |   3 +-
 include/linux/trace_events.h                  |   7 +-
 kernel/bpf/bpf_iter.c                         |  27 +-
 kernel/bpf/cgroup.c                           |  76 +++-
 kernel/bpf/syscall.c                          |  28 +-
 kernel/trace/bpf_trace.c                      |  26 +-
 tools/lib/bpf/bpf.c                           |  17 +-
 tools/lib/bpf/bpf.h                           |   8 +
 .../selftests/bpf/prog_tests/cgroup_link.c    | 324 +++++++++++++++
 .../selftests/bpf/prog_tests/iter_link.c      | 132 ++++++
 .../selftests/bpf/prog_tests/tracing_link.c   | 377 ++++++++++++++++++
 12 files changed, 979 insertions(+), 53 deletions(-)
 create mode 100644 tools/testing/selftests/bpf/prog_tests/iter_link.c
 create mode 100644 tools/testing/selftests/bpf/prog_tests/tracing_link.c

-- 
2.55.0