kernel/tools/testing/selftests/bpf/prog_tests/btf_write.c, branch linux-6.2.y

selftests/bpf: Test new enum kflag and enum64 API functions

2022-06-07T17:20:43Z

Add tests to use the new enum kflag and enum64 API functions in selftest btf_write. Acked-by: Andrii Nakryiko Signed-off-by: Yonghong Song Link: https://lore.kernel.org/r/20220607062703.3724287-1-yhs@fb.com Signed-off-by: Alexei Starovoitov

selftests/bpf: Test libbpf API function btf__add_type_tag()

2021-11-12T01:41:11Z

Add unit tests for btf__add_type_tag(). Signed-off-by: Yonghong Song Signed-off-by: Alexei Starovoitov Acked-by: Andrii Nakryiko Link: https://lore.kernel.org/bpf/20211112012625.1505748-1-yhs@fb.com

bpf: Rename BTF_KIND_TAG to BTF_KIND_DECL_TAG

2021-10-19T01:35:36Z

Patch set [1] introduced BTF_KIND_TAG to allow tagging declarations for struct/union, struct/union field, var, func and func arguments and these tags will be encoded into dwarf. They are also encoded to btf by llvm for the bpf target. After BTF_KIND_TAG is introduced, we intended to use it for kernel __user attributes. But kernel __user is actually a type attribute. Upstream and internal discussion showed it is not a good idea to mix declaration attribute and type attribute. So we proposed to introduce btf_type_tag as a type attribute and existing btf_tag renamed to btf_decl_tag ([2]). This patch renamed BTF_KIND_TAG to BTF_KIND_DECL_TAG and some other declarations with *_tag to *_decl_tag to make it clear the tag is for declaration. In the future, BTF_KIND_TYPE_TAG might be introduced per [3]. [1] https://lore.kernel.org/bpf/20210914223004.244411-1-yhs@fb.com/ [2] https://reviews.llvm.org/D111588 [3] https://reviews.llvm.org/D111199 Fixes: b5ea834dde6b ("bpf: Support for new btf kind BTF_KIND_TAG") Fixes: 5b84bd10363e ("libbpf: Add support for BTF_KIND_TAG") Fixes: 5c07f2fec003 ("bpftool: Add support for BTF_KIND_TAG") Signed-off-by: Yonghong Song Signed-off-by: Alexei Starovoitov Link: https://lore.kernel.org/bpf/20211012164838.3345699-1-yhs@fb.com

selftests/bpf: Test new btf__add_btf() API

2021-10-06T13:36:30Z

Add a test that validates that btf__add_btf() API is correctly copying all the types from the source BTF into destination BTF object and adjusts type IDs and string offsets properly. Signed-off-by: Andrii Nakryiko Signed-off-by: Daniel Borkmann Link: https://lore.kernel.org/bpf/20211006051107.17921-4-andrii@kernel.org

selftests/bpf: Refactor btf_write selftest to reuse BTF generation logic

2021-10-06T13:36:29Z

Next patch will need to reuse BTF generation logic, which tests every supported BTF kind, for testing btf__add_btf() APIs. So restructure existing selftests and make it as a single subtest that uses bulk VALIDATE_RAW_BTF() macro for raw BTF dump checking. Signed-off-by: Andrii Nakryiko Signed-off-by: Daniel Borkmann Acked-by: Song Liu Link: https://lore.kernel.org/bpf/20211006051107.17921-3-andrii@kernel.org

selftests/bpf: Test libbpf API function btf__add_tag()

2021-09-15T01:45:52Z

Add btf_write tests with btf__add_tag() function. Signed-off-by: Yonghong Song Signed-off-by: Alexei Starovoitov Acked-by: Andrii Nakryiko Link: https://lore.kernel.org/bpf/20210914223036.247560-1-yhs@fb.com

selftests/bpf: Turn on libbpf 1.0 mode and fix all IS_ERR checks

2021-05-26T00:32:35Z

Turn ony libbpf 1.0 mode. Fix all the explicit IS_ERR checks that now will be broken because libbpf returns NULL on error (and sets errno). Fix ASSERT_OK_PTR and ASSERT_ERR_PTR to work for both old mode and new modes and use them throughout selftests. This is trivial to do by using libbpf_get_error() API that all libbpf users are supposed to use, instead of IS_ERR checks. A bunch of checks also did explicit -1 comparison for various fd-returning APIs. Such checks are replaced with >= 0 or < 0 cases. There were also few misuses of bpf_object__find_map_by_name() in test_maps. Those are fixed in this patch as well. Signed-off-by: Andrii Nakryiko Signed-off-by: Alexei Starovoitov Acked-by: John Fastabend Acked-by: Toke Høiland-Jørgensen Link: https://lore.kernel.org/bpf/20210525035935.1461796-3-andrii@kernel.org

selftests/bpf: Add checking of raw type dump in BTF writer APIs selftests

2020-11-06T02:37:30Z

Add re-usable btf_helpers.{c,h} to provide BTF-related testing routines. Start with adding a raw BTF dumping helpers. Raw BTF dump is the most succinct and at the same time a very human-friendly way to validate exact contents of BTF types. Cross-validate raw BTF dump and writable BTF in a single selftest. Raw type dump checks also serve as a good self-documentation. Signed-off-by: Andrii Nakryiko Signed-off-by: Alexei Starovoitov Acked-by: Song Liu Link: https://lore.kernel.org/bpf/20201105043402.2530976-7-andrii@kernel.org

selftests/bpf: Move and extend ASSERT_xxx() testing macros

2020-09-29T19:21:23Z

Move existing ASSERT_xxx() macros out of btf_write selftest into test_progs.h to use across all selftests. Also expand a set of macros for typical cases. Now there are the following macros: - ASSERT_EQ() -- check for equality of two integers; - ASSERT_STREQ() -- check for equality of two C strings; - ASSERT_OK() -- check for successful (zero) return result; - ASSERT_ERR() -- check for unsuccessful (non-zero) return result; - ASSERT_NULL() -- check for NULL pointer; - ASSERT_OK_PTR() -- check for a valid pointer; - ASSERT_ERR_PTR() -- check for NULL or negative error encoded in a pointer. Signed-off-by: Andrii Nakryiko Signed-off-by: Alexei Starovoitov Link: https://lore.kernel.org/bpf/20200929043046.1324350-2-andriin@fb.com

selftests/bpf: Test BTF writing APIs

2020-09-29T02:17:13Z

Add selftests for BTF writer APIs. Signed-off-by: Andrii Nakryiko Signed-off-by: Alexei Starovoitov Acked-by: John Fastabend Link: https://lore.kernel.org/bpf/20200929020533.711288-4-andriin@fb.com