[v3,bpf-next,0/8] bpf: Misc improvements

Message

Alexei Starovoitov Feb. 9, 2021, 7:48 p.m. UTC

From: Alexei Starovoitov <[e-mail]>

v3:
- address review comments
- improve recursion selftest

Several bpf improvements:
- optimize prog stats
- compute stats for sleepable progs
- prevent recursion fentry/fexit and sleepable progs
- allow map-in-map and per-cpu maps in sleepable progs

Alexei Starovoitov (8):
  bpf: Optimize program stats
  bpf: Compute program stats for sleepable programs
  bpf: Add per-program recursion prevention mechanism
  selftest/bpf: Add a recursion test
  bpf: Count the number of times recursion was prevented
  selftests/bpf: Improve recursion selftest
  bpf: Allows per-cpu maps and map-in-map in sleepable programs
  selftests/bpf: Add a test for map-in-map and per-cpu maps in sleepable
    progs

 arch/x86/net/bpf_jit_comp.c                   | 46 ++++++-----
 include/linux/bpf.h                           | 16 +---
 include/linux/filter.h                        | 16 +++-
 include/uapi/linux/bpf.h                      |  1 +
 kernel/bpf/core.c                             | 16 +++-
 kernel/bpf/hashtab.c                          |  4 +-
 kernel/bpf/syscall.c                          | 16 ++--
 kernel/bpf/trampoline.c                       | 77 +++++++++++++++----
 kernel/bpf/verifier.c                         |  9 ++-
 tools/bpf/bpftool/prog.c                      |  4 +
 tools/include/uapi/linux/bpf.h                |  1 +
 .../selftests/bpf/prog_tests/fexit_stress.c   |  4 +-
 .../selftests/bpf/prog_tests/recursion.c      | 41 ++++++++++
 .../bpf/prog_tests/trampoline_count.c         |  4 +-
 tools/testing/selftests/bpf/progs/lsm.c       | 69 +++++++++++++++++
 tools/testing/selftests/bpf/progs/recursion.c | 46 +++++++++++
 16 files changed, 303 insertions(+), 67 deletions(-)
 create mode 100644 tools/testing/selftests/bpf/prog_tests/recursion.c
 create mode 100644 tools/testing/selftests/bpf/progs/recursion.c