[v2,bpf-next,0/7] bpf: Misc improvements

Message

Alexei Starovoitov Feb. 6, 2021, 5:03 p.m. UTC

From: Alexei Starovoitov <[e-mail]>

Several 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 (7):
  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
  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                        | 12 +++-
 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                       | 59 +++++++++++++---
 kernel/bpf/verifier.c                         |  9 ++-
 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/lsm.c       | 69 +++++++++++++++++++
 tools/testing/selftests/bpf/progs/recursion.c | 46 +++++++++++++
 16 files changed, 282 insertions(+), 57 deletions(-)
 create mode 100644 tools/testing/selftests/bpf/prog_tests/recursion.c
 create mode 100644 tools/testing/selftests/bpf/progs/recursion.c