From 7e86a8c4ac8d5dcf7dd58f5a4779d1a6ff0a827d Mon Sep 17 00:00:00 2001 From: Andrii Nakryiko Date: Wed, 8 Mar 2023 10:41:21 -0800 Subject: selftests/bpf: implement and test custom testmod_seq iterator Implement a trivial iterator returning same specified integer value N times as part of bpf_testmod kernel module. Add selftests to validate everything works end to end. We also reuse these tests as "verification-only" tests to validate that kernel prints the state of custom kernel module-defined iterator correctly: fp-16=iter_testmod_seq(ref_id=1,state=drained,depth=0) "testmod_seq" part is an iterator type, and is coming from module's BTF data dynamically at runtime. Signed-off-by: Andrii Nakryiko Link: https://lore.kernel.org/r/20230308184121.1165081-9-andrii@kernel.org Signed-off-by: Alexei Starovoitov --- tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.h | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.h') diff --git a/tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.h b/tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.h index 0d71e2607832..f32793efe095 100644 --- a/tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.h +++ b/tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.h @@ -22,4 +22,10 @@ struct bpf_testmod_test_writable_ctx { int val; }; +/* BPF iter that returns *value* *n* times in a row */ +struct bpf_iter_testmod_seq { + s64 value; + int cnt; +}; + #endif /* _BPF_TESTMOD_H */ -- cgit v1.2.3