kernel/tools/testing/selftests/bpf/progs/kfunc_call_test.c, branch linux-6.2.y

selftests/bpf: Add tests for kfunc returning a memory pointer

2022-09-07T18:05:17Z

We add 2 new kfuncs that are following the RET_PTR_TO_MEM capability from the previous commit. Then we test them in selftests: the first tests are testing valid case, and are not failing, and the later ones are actually preventing the program to be loaded because they are wrong. To work around that, we mark the failing ones as not autoloaded (with SEC("?tc")), and we manually enable them one by one, ensuring the verifier rejects them. Signed-off-by: Benjamin Tissoires Link: https://lore.kernel.org/r/20220906151303.2780789-8-benjamin.tissoires@redhat.com Signed-off-by: Alexei Starovoitov

selftests/bpf: add test for accessing ctx from syscall program type

2022-09-07T18:04:27Z

We need to also export the kfunc set to the syscall program type, and then add a couple of eBPF programs that are testing those calls. The first one checks for valid access, and the second one is OK from a static analysis point of view but fails at run time because we are trying to access outside of the allocated memory. Signed-off-by: Benjamin Tissoires Link: https://lore.kernel.org/r/20220906151303.2780789-5-benjamin.tissoires@redhat.com Signed-off-by: Alexei Starovoitov

selftests/bpf: Extend kfunc selftests

2022-01-18T22:26:42Z

Use the prog_test kfuncs to test the referenced PTR_TO_BTF_ID kfunc support, and PTR_TO_CTX, PTR_TO_MEM argument passing support. Also testing the various failure cases for invalid kfunc prototypes. Signed-off-by: Kumar Kartikeya Dwivedi Link: https://lore.kernel.org/r/20220114163953.1455836-10-memxor@gmail.com Signed-off-by: Alexei Starovoitov

selftests/bpf: Switch SEC("classifier*") usage to a strict SEC("tc")

2021-09-28T20:51:19Z

Convert all SEC("classifier*") uses to a new and strict SEC("tc") section name. In reference_tracking selftests switch from ambiguous searching by program title (section name) to non-ambiguous searching by name in some selftests, getting closer to completely removing bpf_object__find_program_by_title(). Signed-off-by: Andrii Nakryiko Signed-off-by: Alexei Starovoitov Link: https://lore.kernel.org/bpf/20210928161946.2512801-4-andrii@kernel.org

bpf: selftests: Add kfunc_call test

2021-03-27T03:41:52Z

This patch adds a few kernel function bpf_kfunc_call_test*() for the selftest's test_run purpose. They will be allowed for tc_cls prog. The selftest calling the kernel function bpf_kfunc_call_test*() is also added in this patch. Signed-off-by: Martin KaFai Lau Signed-off-by: Alexei Starovoitov Link: https://lore.kernel.org/bpf/20210325015252.1551395-1-kafai@fb.com