[bpf-next,v2,0/4] Enable struct_ops programs to be sleepable

Message

David Vernet Jan. 24, 2023, 4:07 p.m. UTC

This is part 2 of https://lore.kernel.org/bpf/[e-mail]/

Changelog:
----------
v1 -> v2:
- Add support for specifying sleepable struct_ops programs with
  struct_ops.s in libbpf (Alexei).
- Move failure test case into new dummy_st_ops_fail.c prog file.
- Update test_dummy_sleepable() to use struct_ops.s instead of manually
  setting prog flags. Also remove open_load_skel() helper which is no
  longer needed.
- Fix verifier tests to expect new sleepable prog failure message.

David Vernet (4):
  bpf: Allow BPF_PROG_TYPE_STRUCT_OPS programs to be sleepable
  libbpf: Support sleepable struct_ops.s section
  bpf: Pass const struct bpf_prog * to .check_member
  bpf/selftests: Verify struct_ops prog sleepable behavior

 include/linux/bpf.h                           |  4 +-
 kernel/bpf/verifier.c                         |  7 ++-
 net/bpf/bpf_dummy_struct_ops.c                | 18 ++++++
 net/bpf/test_run.c                            |  6 ++
 net/ipv4/bpf_tcp_ca.c                         |  3 +-
 tools/lib/bpf/libbpf.c                        |  1 +
 .../selftests/bpf/prog_tests/dummy_st_ops.c   | 56 ++++++++++++++-----
 .../selftests/bpf/progs/dummy_st_ops_common.h | 20 +++++++
 .../selftests/bpf/progs/dummy_st_ops_fail.c   | 41 ++++++++++++++
 ...{dummy_st_ops.c => dummy_st_ops_success.c} | 18 +++---
 10 files changed, 145 insertions(+), 29 deletions(-)
 create mode 100644 tools/testing/selftests/bpf/progs/dummy_st_ops_common.h
 create mode 100644 tools/testing/selftests/bpf/progs/dummy_st_ops_fail.c
 rename tools/testing/selftests/bpf/progs/{dummy_st_ops.c => dummy_st_ops_success.c} (75%)