Re: [PATCH bpf-next 6/6] selftests/bpf: test detaching struct_ops links.

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On 5/1/24 10:05, Andrii Nakryiko wrote:
On Mon, Apr 29, 2024 at 2:36 PM Kui-Feng Lee <thinker.li@xxxxxxxxx> wrote:

Verify whether a user space program is informed through epoll with EPOLLHUP
when a struct_ops object is detached or unregistered using the function
bpf_struct_ops_kvalue_unreg() or BPF_LINK_DETACH.

Signed-off-by: Kui-Feng Lee <thinker.li@xxxxxxxxx>
---
  .../selftests/bpf/bpf_testmod/bpf_testmod.c   |  18 ++-
  .../selftests/bpf/bpf_testmod/bpf_testmod.h   |   1 +
  .../bpf/prog_tests/test_struct_ops_module.c   | 104 ++++++++++++++++++
  .../selftests/bpf/progs/struct_ops_module.c   |   7 ++
  4 files changed, 126 insertions(+), 4 deletions(-)


[...]

diff --git a/tools/testing/selftests/bpf/progs/struct_ops_module.c b/tools/testing/selftests/bpf/progs/struct_ops_module.c
index 63b065dae002..7a697a7dd0ac 100644
--- a/tools/testing/selftests/bpf/progs/struct_ops_module.c
+++ b/tools/testing/selftests/bpf/progs/struct_ops_module.c

this file is a bit overloaded with code for various subtests, it's
quite hard already to follow what's going on, I suggest adding a
separate .c file for this new subtest

Ok!


@@ -81,3 +81,10 @@ struct bpf_testmod_ops___incompatible testmod_incompatible = {
         .test_2 = (void *)test_2,
         .data = 3,
  };
+
+SEC(".struct_ops.link")
+struct bpf_testmod_ops testmod_do_unreg = {
+       .test_1 = (void *)test_1,
+       .test_2 = (void *)test_2,
+       .do_unreg = true,
+};
--
2.34.1





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