hi,
while adding test for pinning the module while there's
trampoline attach to it, I noticed that we don't allow
link detach and following re-attach for trampolines.
Adding that for tracing and lsm programs.
You need to have patch [1] from bpf tree for test module
attach test to pass.
v3 changes:
- used ASSERT* macros apart from lsm test, which is using
CHECKs all over the place [Andrii]
- added acks
thanks,
jirka
[1] https://lore.kernel.org/bpf/20210326105900.151466-1-jolsa@xxxxxxxxxx/
---
Jiri Olsa (5):
bpf: Allow trampoline re-attach for tracing and lsm programs
selftests/bpf: Add re-attach test to fentry_test
selftests/bpf: Add re-attach test to fexit_test
selftests/bpf: Add re-attach test to lsm test
selftests/bpf: Test that module can't be unloaded with attached trampoline
kernel/bpf/syscall.c | 23 +++++++++++++++++------
kernel/bpf/trampoline.c | 2 +-
tools/testing/selftests/bpf/prog_tests/fentry_test.c | 51 ++++++++++++++++++++++++++++++++++++---------------
tools/testing/selftests/bpf/prog_tests/fexit_test.c | 51 ++++++++++++++++++++++++++++++++++++---------------
tools/testing/selftests/bpf/prog_tests/module_attach.c | 23 +++++++++++++++++++++++
tools/testing/selftests/bpf/prog_tests/test_lsm.c | 48 ++++++++++++++++++++++++++++++++++++++----------
tools/testing/selftests/bpf/test_progs.h | 2 +-
7 files changed, 152 insertions(+), 48 deletions(-)
