4 Commits

Author	SHA1	Message	Date
Andrii Nakryiko	7e86a8c4ac	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 <andrii@kernel.org> Link: https://lore.kernel.org/r/20230308184121.1165081-9-andrii@kernel.org Signed-off-by: Alexei Starovoitov <ast@kernel.org>	2023-03-08 16:19:51 -08:00
Hou Tao	fa7f17d066	bpf/selftests: Add test for writable bare tracepoint ... Add a writable bare tracepoint in bpf_testmod module, and trigger its calling when reading /sys/kernel/bpf_testmod with a specific buffer length. The reading will return the value in writable context if the early return flag is enabled in writable context. Signed-off-by: Hou Tao <houtao1@huawei.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20211004094857.30868-4-hotforest@gmail.com	2021-10-08 13:22:57 -07:00
Qais Yousef	407be92206	selftests: bpf: Add a new test for bare tracepoints ... Reuse module_attach infrastructure to add a new bare tracepoint to check we can attach to it as a raw tracepoint. Signed-off-by: Qais Yousef <qais.yousef@arm.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Yonghong Song <yhs@fb.com> Link: https://lore.kernel.org/bpf/20210119122237.2426878-3-qais.yousef@arm.com	2021-01-20 14:14:05 -08:00
Andrii Nakryiko	9f7fa22589	selftests/bpf: Add bpf_testmod kernel module for testing ... Add bpf_testmod module, which is conceptually out-of-tree module and provides ways for selftests/bpf to test various kernel module-related functionality: raw tracepoint, fentry/fexit/fmod_ret, etc. This module will be auto-loaded by test_progs test runner and expected by some of selftests to be present and loaded. Pahole currently isn't able to generate BTF for static functions in kernel modules, so make sure traced function is global. Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Martin KaFai Lau <kafai@fb.com> Link: https://lore.kernel.org/bpf/20201203204634.1325171-7-andrii@kernel.org	2020-12-03 17:38:20 -08:00