[bpf-next,0/5] bpf: Misc improvements

Message

Alexei Starovoitov Feb. 6, 2021, 6:57 a.m. UTC

From: Alexei Starovoitov <[e-mail]>

Several improvements
- optimize prog stats
- compute stats for sleepable progs
- prevent recursion fentry/fexit progs

Alexei Starovoitov (5):
  bpf: Optimize program stats
  bpf: Compute program stats for sleepable programs
  bpf: Add per-program recursion prevention mechanism
  selftest/bpf: Add recursion test
  bpf: Count the number of times recursion was prevented

 arch/x86/net/bpf_jit_comp.c                   | 46 +++++++++------
 include/linux/bpf.h                           | 16 ++---
 include/linux/filter.h                        | 12 +++-
 include/uapi/linux/bpf.h                      |  1 +
 kernel/bpf/core.c                             | 16 +++--
 kernel/bpf/syscall.c                          | 16 +++--
 kernel/bpf/trampoline.c                       | 59 ++++++++++++++++---
 kernel/bpf/verifier.c                         |  2 +-
 tools/bpf/bpftool/prog.c                      |  5 ++
 tools/include/uapi/linux/bpf.h                |  1 +
 .../selftests/bpf/prog_tests/fexit_stress.c   |  2 +-
 .../selftests/bpf/prog_tests/recursion.c      | 33 +++++++++++
 .../bpf/prog_tests/trampoline_count.c         |  4 +-
 tools/testing/selftests/bpf/progs/recursion.c | 46 +++++++++++++++
 14 files changed, 205 insertions(+), 54 deletions(-)
 create mode 100644 tools/testing/selftests/bpf/prog_tests/recursion.c
 create mode 100644 tools/testing/selftests/bpf/progs/recursion.c