Commit b836cbdf authored by Tyrone Wu's avatar Tyrone Wu Committed by Andrii Nakryiko
Browse files

selftests/bpf: Assert link info uprobe_multi count & path_size if unset 



Add assertions in `bpf_link_info.uprobe_multi` test to verify that
`count` and `path_size` fields are correctly populated when the fields
are unset.

This tests a previous bug where the `path_size` field was not populated
when `path` and `path_size` were unset.

Signed-off-by: default avatarTyrone Wu <wudevelops@gmail.com>
Signed-off-by: default avatarAndrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20241011000803.681190-2-wudevelops@gmail.com
parent ad6b5b6e

tools/testing/selftests/bpf/prog_tests/fill_link_info.c

+9 −0
Original line number Diff line number Diff line
@@ -420,6 +420,15 @@ verify_umulti_link_info(int fd, bool retprobe, __u64 *offsets, 
	if (!ASSERT_NEQ(err, -1, "readlink"))

		return -1;



	memset(&info, 0, sizeof(info));

	err = bpf_link_get_info_by_fd(fd, &info, &len);

	if (!ASSERT_OK(err, "bpf_link_get_info_by_fd"))

		return -1;



	ASSERT_EQ(info.uprobe_multi.count, 3, "info.uprobe_multi.count");

	ASSERT_EQ(info.uprobe_multi.path_size, strlen(path) + 1,

		  "info.uprobe_multi.path_size");



	for (bit = 0; bit < 8; bit++) {

		memset(&info, 0, sizeof(info));

		info.uprobe_multi.path = ptr_to_u64(path_buf);