3 Commits

Author	SHA1	Message	Date
Martin KaFai Lau	8568c3cefd	bpf: selftest: Ensure the return value of the bpf_per_cpu_ptr() must be checked ... This patch tests all pointers returned by bpf_per_cpu_ptr() must be tested for NULL first before it can be accessed. This patch adds a subtest "null_check", so it moves the ".data..percpu" existence check to the very beginning and before doing any subtest. Signed-off-by: Martin KaFai Lau <kafai@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20201019194225.1051596-1-kafai@fb.com	2020-10-19 15:57:42 -07:00
Hao Luo	00dc73e44a	bpf/selftests: Test for bpf_per_cpu_ptr() and bpf_this_cpu_ptr() ... Test bpf_per_cpu_ptr() and bpf_this_cpu_ptr(). Test two paths in the kernel. If the base pointer points to a struct, the returned reg is of type PTR_TO_BTF_ID. Direct pointer dereference can be applied on the returned variable. If the base pointer isn't a struct, the returned reg is of type PTR_TO_MEM, which also supports direct pointer dereference. Signed-off-by: Hao Luo <haoluo@google.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Andrii Nakryiko <andriin@fb.com> Link: https://lore.kernel.org/bpf/20200929235049.2533242-7-haoluo@google.com	2020-10-02 15:00:49 -07:00
Hao Luo	2c2f6abeff	selftests/bpf: Ksyms_btf to test typed ksyms ... Selftests for typed ksyms. Tests two types of ksyms: one is a struct, the other is a plain int. This tests two paths in the kernel. Struct ksyms will be converted into PTR_TO_BTF_ID by the verifier while int typed ksyms will be converted into PTR_TO_MEM. Signed-off-by: Hao Luo <haoluo@google.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Andrii Nakryiko <andriin@fb.com> Link: https://lore.kernel.org/bpf/20200929235049.2533242-4-haoluo@google.com	2020-10-02 14:59:25 -07:00