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2022-06-07selftests/bpf: Add selftest for calling global functions from freplaceToke Høiland-Jørgensen1-0/+14
Add a selftest that calls a global function with a context object parameter from an freplace function to check that the program context type is correctly converted to the freplace target when fetching the context type from the kernel BTF. v2: - Trim includes - Get rid of global function - Use __noinline Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com> Link: https://lore.kernel.org/r/20220606075253.28422-2-toke@redhat.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2022-06-07selftests/bpf: Add a test for enum64 value relocationsYonghong Song1-0/+58
Add a test for enum64 value relocations. The test will be skipped if clang version is 14 or lower since enum64 is only supported from version 15. Acked-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Yonghong Song <yhs@fb.com> Link: https://lore.kernel.org/r/20220607062718.3726307-1-yhs@fb.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2022-06-07selftests/bpf: Test BTF_KIND_ENUM64 for deduplicationYonghong Song1-2/+95
Add a few unit tests for BTF_KIND_ENUM64 deduplication. Acked-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Yonghong Song <yhs@fb.com> Link: https://lore.kernel.org/r/20220607062713.3725409-1-yhs@fb.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2022-06-07selftests/bpf: Add BTF_KIND_ENUM64 unit testsYonghong Song1-0/+36
Add unit tests for basic BTF_KIND_ENUM64 encoding. Acked-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Yonghong Song <yhs@fb.com> Link: https://lore.kernel.org/r/20220607062708.3724845-1-yhs@fb.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2022-06-07selftests/bpf: Test new enum kflag and enum64 API functionsYonghong Song1-34/+92
Add tests to use the new enum kflag and enum64 API functions in selftest btf_write. Acked-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Yonghong Song <yhs@fb.com> Link: https://lore.kernel.org/r/20220607062703.3724287-1-yhs@fb.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2022-06-07selftests/bpf: Fix selftests failureYonghong Song1-20/+0
The kflag is supported now for BTF_KIND_ENUM. So remove the test which tests verifier failure due to existence of kflag. Acked-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Yonghong Song <yhs@fb.com> Link: https://lore.kernel.org/r/20220607062657.3723737-1-yhs@fb.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2022-06-03selftests/bpf: Fix tc_redirect_dtimeMartin KaFai Lau1-4/+4
tc_redirect_dtime was reported flaky from time to time. It always fails at the udp test and complains about the bpf@tc-ingress got a skb->tstamp when handling udp packet. It is unexpected because the skb->tstamp should have been cleared when crossing different netns. The most likely cause is that the skb is actually a tcp packet from the earlier tcp test. It could be the final TCP_FIN handling. This patch tightens the skb->tstamp check in the bpf prog. It ensures the skb is the current testing traffic. First, it checks that skb matches the IPPROTO of the running test (i.e. tcp vs udp). Second, it checks the server port (dst_ns_port). The server port is unique for each test (50000 + test_enum). Also fixed a typo in test_udp_dtime(): s/P100/P101/ Fixes: c803475fd8dd ("bpf: selftests: test skb->tstamp in redirect_neigh") Reported-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Martin KaFai Lau <kafai@fb.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Song Liu <songliubraving@fb.com> Link: https://lore.kernel.org/bpf/20220601234050.2572671-1-kafai@fb.com
2022-06-02selftests/bpf: Fix test_run logic in fexit_stress.cYuntao Wang1-28/+4
In the commit da00d2f117a0 ("bpf: Add test ops for BPF_PROG_TYPE_TRACING"), the bpf_fentry_test1 function was moved into bpf_prog_test_run_tracing(), which is the test_run function of the tracing BPF programs. Thus calling 'bpf_prog_test_run_opts(filter_fd, &topts)' will not trigger bpf_fentry_test1 function as filter_fd is a sk_filter BPF program. Fix it by replacing filter_fd with fexit_fd in the bpf_prog_test_run_opts() function. Fixes: da00d2f117a0 ("bpf: Add test ops for BPF_PROG_TYPE_TRACING") Signed-off-by: Yuntao Wang <ytcoode@gmail.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20220521151329.648013-1-ytcoode@gmail.com
2022-06-02selftests/bpf: Add test for libbpf_bpf_link_type_strDaniel Müller1-0/+48
This change adds a test for libbpf_bpf_link_type_str. The test retrieves all variants of the bpf_link_type enumeration using BTF and makes sure that the function under test works as expected for them. Signed-off-by: Daniel Müller <deso@posteo.net> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Quentin Monnet <quentin@isovalent.com> Acked-by: Yonghong Song <yhs@fb.com> Link: https://lore.kernel.org/bpf/20220523230428.3077108-12-deso@posteo.net
2022-06-02selftests/bpf: Add test for libbpf_bpf_attach_type_strDaniel Müller1-0/+48
This change adds a test for libbpf_bpf_attach_type_str. The test retrieves all variants of the bpf_attach_type enumeration using BTF and makes sure that the function under test works as expected for them. Signed-off-by: Daniel Müller <deso@posteo.net> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Quentin Monnet <quentin@isovalent.com> Acked-by: Yonghong Song <yhs@fb.com> Link: https://lore.kernel.org/bpf/20220523230428.3077108-9-deso@posteo.net
2022-06-02selftests/bpf: Add test for libbpf_bpf_map_type_strDaniel Müller1-1/+55
This change adds a test for libbpf_bpf_map_type_str. The test retrieves all variants of the bpf_map_type enumeration using BTF and makes sure that the function under test works as expected for them. Signed-off-by: Daniel Müller <deso@posteo.net> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Quentin Monnet <quentin@isovalent.com> Acked-by: Yonghong Song <yhs@fb.com> Link: https://lore.kernel.org/bpf/20220523230428.3077108-6-deso@posteo.net
2022-06-02selftests/bpf: Add test for libbpf_bpf_prog_type_strDaniel Müller1-0/+57
This change adds a test for libbpf_bpf_prog_type_str. The test retrieves all variants of the bpf_prog_type enumeration using BTF and makes sure that the function under test works as expected for them. Signed-off-by: Daniel Müller <deso@posteo.net> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Quentin Monnet <quentin@isovalent.com> Acked-by: Yonghong Song <yhs@fb.com> Link: https://lore.kernel.org/bpf/20220523230428.3077108-3-deso@posteo.net
2022-05-23selftests/bpf: Dynptr testsJoanne Koong1-0/+137
This patch adds tests for dynptrs, which include cases that the verifier needs to reject (for example, a bpf_ringbuf_reserve_dynptr without a corresponding bpf_ringbuf_submit/discard_dynptr) as well as cases that should successfully pass. Signed-off-by: Joanne Koong <joannelkoong@gmail.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20220523210712.3641569-7-joannelkoong@gmail.com
2022-05-23selftests/bpf: Fix spelling mistake: "unpriviliged" -> "unprivileged"Colin Ian King1-2/+2
There are spelling mistakes in ASSERT messages. Fix these. Signed-off-by: Colin Ian King <colin.i.king@gmail.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20220523115604.49942-1-colin.i.king@gmail.com
2022-05-20selftests/bpf: add tests verifying unprivileged bpf behaviourAlan Maguire1-0/+312
tests load/attach bpf prog with maps, perfbuf and ringbuf, pinning them. Then effective caps are dropped and we verify we can - pick up the pin - create ringbuf/perfbuf - get ringbuf/perfbuf events, carry out map update, lookup and delete - create a link Negative testing also ensures - BPF prog load fails - BPF map create fails - get fd by id fails - get next id fails - query fails - BTF load fails Signed-off-by: Alan Maguire <alan.maguire@oracle.com> Acked-by: Yonghong Song <yhs@fb.com> Link: https://lore.kernel.org/r/1652970334-30510-3-git-send-email-alan.maguire@oracle.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2022-05-20selftests/bpf: Add missing trampoline program type to trampoline_count testYuntao Wang1-83/+51
Currently the trampoline_count test doesn't include any fmod_ret bpf programs, fix it to make the test cover all possible trampoline program types. Since fmod_ret bpf programs can't be attached to __set_task_comm function, as it's neither whitelisted for error injection nor a security hook, change it to bpf_modify_return_test. This patch also does some other cleanups such as removing duplicate code, dropping inconsistent comments, etc. Signed-off-by: Yuntao Wang <ytcoode@gmail.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Yonghong Song <yhs@fb.com> Link: https://lore.kernel.org/bpf/20220519150610.601313-1-ytcoode@gmail.com
2022-05-20selftests/bpf: Verify first of struct mptcp_sockGeliang Tang1-0/+5
This patch verifies the 'first' struct member of struct mptcp_sock, which points to the first subflow of msk. Save 'sk' in mptcp_storage, and verify it with 'first' in verify_msk(). v5: - Use ASSERT_EQ() instead of a manual comparison + log (Andrii). Signed-off-by: Geliang Tang <geliang.tang@suse.com> Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Matthieu Baerts <matthieu.baerts@tessares.net> Link: https://lore.kernel.org/bpf/20220519233016.105670-8-mathew.j.martineau@linux.intel.com
2022-05-20selftests/bpf: Verify ca_name of struct mptcp_sockGeliang Tang1-0/+31
This patch verifies another member of struct mptcp_sock, ca_name. Add a new function get_msk_ca_name() to read the sysctl tcp_congestion_control and verify it in verify_msk(). v3: Access the sysctl through the filesystem to avoid compatibility issues with the busybox sysctl command. v4: use ASSERT_* instead of CHECK_FAIL (Andrii) v5: use ASSERT_STRNEQ() instead of strncmp() (Andrii) Signed-off-by: Geliang Tang <geliang.tang@suse.com> Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Matthieu Baerts <matthieu.baerts@tessares.net> Link: https://lore.kernel.org/bpf/20220519233016.105670-7-mathew.j.martineau@linux.intel.com
2022-05-20selftests/bpf: Verify token of struct mptcp_sockGeliang Tang1-2/+13
This patch verifies the struct member token of struct mptcp_sock. Add a new member token in struct mptcp_storage to store the token value of the msk socket got by bpf_skc_to_mptcp_sock(). Trace the kernel function mptcp_pm_new_connection() by using bpf fentry prog to obtain the msk token and save it in a global bpf variable. Pass the variable to verify_msk() to verify it with the token saved in socket_storage_map. v4: - use ASSERT_* instead of CHECK_FAIL (Andrii) - skip the test if 'ip mptcp monitor' is not supported (Mat) v5: - Drop 'ip mptcp monitor', trace mptcp_pm_new_connection instead (Martin) - Use ASSERT_EQ (Andrii) Signed-off-by: Geliang Tang <geliang.tang@suse.com> Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Matthieu Baerts <matthieu.baerts@tessares.net> Link: https://lore.kernel.org/bpf/20220519233016.105670-6-mathew.j.martineau@linux.intel.com
2022-05-20selftests/bpf: Test bpf_skc_to_mptcp_sockGeliang Tang1-6/+21
This patch extends the MPTCP test base, to test the new helper bpf_skc_to_mptcp_sock(). Define struct mptcp_sock in bpf_tcp_helpers.h, use bpf_skc_to_mptcp_sock to get the msk socket in progs/mptcp_sock.c and store the infos in socket_storage_map. Get the infos from socket_storage_map in prog_tests/mptcp.c. Add a new function verify_msk() to verify the infos of MPTCP socket, and rename verify_sk() to verify_tsk() to verify TCP socket only. v2: Add CONFIG_MPTCP check for clearer error messages v4: - use ASSERT_* instead of CHECK_FAIL (Andrii) - drop bpf_mptcp_helpers.h (Andrii) v5: - some 'ASSERT_*' were replaced in the next commit by mistake. - Drop CONFIG_MPTCP (Martin) - Use ASSERT_EQ (Andrii) Signed-off-by: Geliang Tang <geliang.tang@suse.com> Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Matthieu Baerts <matthieu.baerts@tessares.net> Link: https://lore.kernel.org/bpf/20220519233016.105670-5-mathew.j.martineau@linux.intel.com
2022-05-20selftests/bpf: Add MPTCP test baseNicolas Rybowski1-0/+112
This patch adds a base for MPTCP specific tests. It is currently limited to the is_mptcp field in case of plain TCP connection because there is no easy way to get the subflow sk from a msk in userspace. This implies that we cannot lookup the sk_storage attached to the subflow sk in the sockops program. v4: - add copyright 2022 (Andrii) - use ASSERT_* instead of CHECK_FAIL (Andrii) - drop SEC("version") (Andrii) - use is_mptcp in tcp_sock, instead of bpf_tcp_sock (Martin & Andrii) v5: - Drop connect_to_mptcp_fd (Martin) - Use BPF test skeleton (Andrii) - Use ASSERT_EQ (Andrii) - Drop the 'msg' parameter of verify_sk Co-developed-by: Geliang Tang <geliang.tang@suse.com> Signed-off-by: Geliang Tang <geliang.tang@suse.com> Signed-off-by: Nicolas Rybowski <nicolas.rybowski@tessares.net> Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Matthieu Baerts <matthieu.baerts@tessares.net> Link: https://lore.kernel.org/bpf/20220519233016.105670-4-mathew.j.martineau@linux.intel.com
2022-05-20selftests/bpf: Fix some bugs in map_lookup_percpu_elem testcaseFeng Zhou1-18/+30
comments from Andrii Nakryiko, details in here: https://lore.kernel.org/lkml/20220511093854.411-1-zhoufeng.zf@bytedance.com/T/ use /* */ instead of // use libbpf_num_possible_cpus() instead of sysconf(_SC_NPROCESSORS_ONLN) use 8 bytes for value size fix memory leak use ASSERT_EQ instead of ASSERT_OK add bpf_loop to fetch values on each possible CPU Fixes: ed7c13776e20c74486b0939a3c1de984c5efb6aa ("selftests/bpf: add test case for bpf_map_lookup_percpu_elem") Signed-off-by: Feng Zhou <zhoufeng.zf@bytedance.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Yonghong Song <yhs@fb.com> Link: https://lore.kernel.org/bpf/20220518025053.20492-1-zhoufeng.zf@bytedance.com
2022-05-13selftests/bpf: Fix usdt_400 test caseAndrii Nakryiko1-4/+2
usdt_400 test case relies on compiler using the same arg spec for usdt_400 USDT. This assumption breaks with Clang (Clang generates different arg specs with varying offsets relative to %rbp), so simplify this further and hard-code the constant which will guarantee that arg spec is the same across all 400 inlinings. Fixes: 630301b0d59d ("selftests/bpf: Add basic USDT selftests") Reported-by: Mykola Lysenko <mykolal@fb.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Yonghong Song <yhs@fb.com> Link: https://lore.kernel.org/bpf/20220513173703.89271-1-andrii@kernel.org
2022-05-13selftests/bpf: Convert some selftests to high-level BPF map APIsAndrii Nakryiko8-47/+61
Convert a bunch of selftests to using newly added high-level BPF map APIs. This change exposed that map_kptr selftests allocated too big buffer, which is fixed in this patch as well. Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20220512220713.2617964-2-andrii@kernel.org
2022-05-11selftests/bpf: make fexit_stress test run in serial modeAndrii Nakryiko1-1/+1
fexit_stress is attaching maximum allowed amount of fexit programs to bpf_fentry_test1 kernel function, which is used by a bunch of other parallel tests, thus pretty frequently interfering with their execution. Given the test assumes nothing else is attaching to bpf_fentry_test1, mark it serial. Suggested-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/r/20220511232012.609370-1-andrii@kernel.org Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2022-05-11selftests/bpf: add test case for bpf_map_lookup_percpu_elemFeng Zhou1-0/+46
test_progs: Tests new ebpf helpers bpf_map_lookup_percpu_elem. Signed-off-by: Feng Zhou <zhoufeng.zf@bytedance.com> Link: https://lore.kernel.org/r/20220511093854.411-3-zhoufeng.zf@bytedance.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2022-05-11selftests/bpf: Add tests for kptr_ref refcountingKumar Kartikeya Dwivedi1-3/+24
Check at runtime how various operations for kptr_ref affect its refcount and verify against the actual count. Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com> Link: https://lore.kernel.org/r/20220511194654.765705-5-memxor@gmail.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2022-05-11selftests/bpf: Add negative C tests for kptrsKumar Kartikeya Dwivedi1-1/+86
This uses the newly added SEC("?foo") naming to disable autoload of programs, and then loads them one by one for the object and verifies that loading fails and matches the returned error string from verifier. This is similar to already existing verifier tests but provides coverage for BPF C. Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com> Link: https://lore.kernel.org/r/20220511194654.765705-4-memxor@gmail.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2022-05-11selftests/bpf: fix a few clang compilation errorsYonghong Song2-3/+5
With latest clang, I got the following compilation errors: .../prog_tests/test_tunnel.c:291:6: error: variable 'local_ip_map_fd' is used uninitialized whenever 'if' condition is true [-Werror,-Wsometimes-uninitialized] if (attach_tc_prog(&tc_hook, -1, set_dst_prog_fd)) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .../bpf/prog_tests/test_tunnel.c:312:6: note: uninitialized use occurs here if (local_ip_map_fd >= 0) ^~~~~~~~~~~~~~~ ... .../prog_tests/kprobe_multi_test.c:346:6: error: variable 'err' is used uninitialized whenever 'if' condition is true [-Werror,-Wsometimes-uninitialized] if (IS_ERR(map)) ^~~~~~~~~~~ .../prog_tests/kprobe_multi_test.c:388:6: note: uninitialized use occurs here if (err) { ^~~ This patch fixed the above compilation errors. Signed-off-by: Yonghong Song <yhs@fb.com> Acked-by: David Vernet <void@manifault.com> Link: https://lore.kernel.org/r/20220511184735.3670214-1-yhs@fb.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2022-05-10selftest/bpf: The test cases of BPF cookie for fentry/fexit/fmod_ret/lsm.Kui-Feng Lee1-0/+89
Make sure BPF cookies are correct for fentry/fexit/fmod_ret/lsm. Signed-off-by: Kui-Feng Lee <kuifeng@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20220510205923.3206889-6-kuifeng@fb.com
2022-05-10selftests/bpf: Add attach bench testJiri Olsa1-0/+143
Adding test that reads all functions from ftrace available_filter_functions file and attach them all through kprobe_multi API. It also prints stats info with -v option, like on my setup: test_bench_attach: found 48712 functions test_bench_attach: attached in 1.069s test_bench_attach: detached in 0.373s Acked-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Jiri Olsa <jolsa@kernel.org> Link: https://lore.kernel.org/r/20220510122616.2652285-6-jolsa@kernel.org Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2022-05-10selftests/bpf: Add bpf link iter testDmitrii Dolgov1-0/+16
Add a simple test for bpf link iterator Signed-off-by: Dmitrii Dolgov <9erthalion6@gmail.com> Link: https://lore.kernel.org/r/20220510155233.9815-5-9erthalion6@gmail.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2022-05-10selftests/bpf: Use ASSERT_* instead of CHECKDmitrii Dolgov1-154/+88
Replace usage of CHECK with a corresponding ASSERT_* macro for bpf_iter tests. Only done if the final result is equivalent, no changes when replacement means loosing some information, e.g. from formatting string. Signed-off-by: Dmitrii Dolgov <9erthalion6@gmail.com> Link: https://lore.kernel.org/r/20220510155233.9815-4-9erthalion6@gmail.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2022-05-10selftests/bpf: Fix result check for test_bpf_hash_mapDmitrii Dolgov1-2/+1
The original condition looks like a typo, verify the skeleton loading result instead. Signed-off-by: Dmitrii Dolgov <9erthalion6@gmail.com> Link: https://lore.kernel.org/r/20220510155233.9815-3-9erthalion6@gmail.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2022-05-10selftests/bpf: Move vxlan tunnel testcases to test_progsKaixi Fan1-0/+423
Move vxlan tunnel testcases from test_tunnel.sh to test_progs. And add vxlan tunnel source testcases also. Other tunnel testcases will be moved to test_progs step by step in the future. Rename bpf program section name as SEC("tc") because test_progs bpf loader could not load sections with name SEC("gre_set_tunnel"). Because of this, add bpftool to load bpf programs in test_tunnel.sh. Signed-off-by: Kaixi Fan <fankaixi.li@bytedance.com> Link: https://lore.kernel.org/r/20220430074844.69214-3-fankaixi.li@bytedance.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2022-05-09selftests/bpf: Test libbpf's ringbuf size fix up logicAndrii Nakryiko1-12/+0
Make sure we always excercise libbpf's ringbuf map size adjustment logic by specifying non-zero size that's definitely not a page size multiple. Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20220509004148.1801791-10-andrii@kernel.org
2022-05-09selftests/bpf: Add bpf_core_field_offset() testsAndrii Nakryiko1-2/+11
Add test cases for bpf_core_field_offset() helper. Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20220509004148.1801791-7-andrii@kernel.org
2022-04-28selftests/bpf: Test bpf_map__set_autocreate() and related log fixup logicAndrii Nakryiko1-1/+36
Add a subtest that excercises bpf_map__set_autocreate() API and validates that libbpf properly fixes up BPF verifier log with correct map information. Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20220428041523.4089853-5-andrii@kernel.org
2022-04-28selftests/bpf: Use target-less SEC() definitions in various testsAndrii Nakryiko2-7/+17
Add new or modify existing SEC() definitions to be target-less and validate that libbpf handles such program definitions correctly. For kprobe/kretprobe we also add explicit test that generic bpf_program__attach() works in cases when kprobe definition contains proper target. It wasn't previously tested as selftests code always explicitly specified the target regardless. Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Song Liu <songliubraving@fb.com> Link: https://lore.kernel.org/bpf/20220428185349.3799599-4-andrii@kernel.org
2022-04-26selftests/bpf: Add libbpf's log fixup logic selftestsAndrii Nakryiko1-0/+114
Add tests validating that libbpf is indeed patching up BPF verifier log with CO-RE relocation details. Also test partial and full truncation scenarios. This test might be a bit fragile due to changing BPF verifier log format. If that proves to be frequently breaking, we can simplify tests or remove the truncation subtests. But for now it seems useful to test it in those conditions that are otherwise rarely occuring in practice. Also test CO-RE relo failure in a subprog as that excercises subprogram CO-RE relocation mapping logic which doesn't work out of the box without extra relo storage previously done only for gen_loader case. Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20220426004511.2691730-11-andrii@kernel.org
2022-04-26selftests/bpf: Add CO-RE relos and SEC("?...") to linked_funcs selftestsAndrii Nakryiko1-0/+6
Enhance linked_funcs selftest with two tricky features that might not obviously work correctly together. We add CO-RE relocations to entry BPF programs and mark those programs as non-autoloadable with SEC("?...") annotation. This makes sure that libbpf itself handles .BTF.ext CO-RE relocation data matching correctly for SEC("?...") programs, as well as ensures that BPF static linker handles this correctly (this was the case before, no changes are necessary, but it wasn't explicitly tested). Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20220426004511.2691730-6-andrii@kernel.org
2022-04-25selftests/bpf: Add C tests for kptrKumar Kartikeya Dwivedi1-0/+37
This uses the __kptr and __kptr_ref macros as well, and tries to test the stuff that is supposed to work, since we have negative tests in test_verifier suite. Also include some code to test map-in-map support, such that the inner_map_meta matches the kptr_off_tab of map added as element. Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20220424214901.2743946-12-memxor@gmail.com
2022-04-23selftests/bpf: Switch fexit_stress to bpf_link_create() APIAndrii Nakryiko1-1/+1
Use bpf_link_create() API in fexit_stress test to attach FEXIT programs. Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Reviewed-by: Kui-Feng Lee <kuifeng@fb.com> Link: https://lore.kernel.org/bpf/20220421033945.3602803-4-andrii@kernel.org
2022-04-21selftests/bpf: Fix prog_tests uprobe_autoattach compilation errorArtem Savkov1-1/+2
I am getting the following compilation error for prog_tests/uprobe_autoattach.c: tools/testing/selftests/bpf/prog_tests/uprobe_autoattach.c: In function ‘test_uprobe_autoattach’: ./test_progs.h:209:26: error: pointer ‘mem’ may be used after ‘free’ [-Werror=use-after-free] The value of mem is now used in one of the asserts, which is why it may be confusing compilers. However, it is not dereferenced. Silence this by moving free(mem) after the assert block. Fixes: 1717e248014c ("selftests/bpf: Uprobe tests should verify param/return values") Signed-off-by: Artem Savkov <asavkov@redhat.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20220421132317.1583867-1-asavkov@redhat.com
2022-04-20selftests/bpf: Add test for skb_load_bytesLiu Jian1-0/+45
Use bpf_prog_test_run_opts to test the skb_load_bytes function. Tests the behavior when offset is greater than INT_MAX or a normal value. Signed-off-by: Liu Jian <liujian56@huawei.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Song Liu <songliubraving@fb.com> Link: https://lore.kernel.org/bpf/20220416105801.88708-4-liujian56@huawei.com
2022-04-19selftests/bpf: Add tests for type tag order validationKumar Kartikeya Dwivedi1-0/+99
Add a few test cases that ensure we catch cases of badly ordered type tags in modifier chains. Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Yonghong Song <yhs@fb.com> Link: https://lore.kernel.org/bpf/20220419164608.1990559-3-memxor@gmail.com
2022-04-19selftests/bpf: Use non-autoloaded programs in few testsAndrii Nakryiko3-44/+14
Take advantage of new libbpf feature for declarative non-autoloaded BPF program SEC() definitions in few test that test single program at a time out of many available programs within the single BPF object. Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20220419002452.632125-2-andrii@kernel.org
2022-04-18selftests/bpf: Refactor prog_tests logging and test executionMykola Lysenko2-2/+58
This is a pre-req to add separate logging for each subtest in test_progs. Move all the mutable test data to the test_result struct. Move per-test init/de-init into the run_one_test function. Consolidate data aggregation and final log output in calculate_and_print_summary function. As a side effect, this patch fixes double counting of errors for subtests and possible duplicate output of subtest log on failures. Also, add prog_tests_framework.c test to verify some of the counting logic. As part of verification, confirmed that number of reported tests is the same before and after the change for both parallel and sequential test execution. Signed-off-by: Mykola Lysenko <mykolal@fb.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20220418222507.1726259-1-mykolal@fb.com
2022-04-11selftests/bpf: Drop duplicate max/min definitionsGeliang Tang4-11/+4
Drop duplicate macros min() and MAX() definitions in prog_tests and use MIN() or MAX() in sys/param.h instead. Signed-off-by: Geliang Tang <geliang.tang@suse.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Song Liu <songliubraving@fb.com> Link: https://lore.kernel.org/bpf/1ae276da9925c2de59b5bdc93b693b4c243e692e.1649462033.git.geliang.tang@suse.com
2022-04-10selftests/bpf: Use libbpf 1.0 API mode instead of RLIMIT_MEMLOCKYafang Shao1-1/+0
We have switched to memcg-based memory accouting and thus the rlimit is not needed any more. LIBBPF_STRICT_AUTO_RLIMIT_MEMLOCK was introduced in libbpf for backward compatibility, so we can use it instead now. After this change, the header tools/testing/selftests/bpf/bpf_rlimit.h can be removed. This patch also removes the useless header sys/resource.h from many files in tools/testing/selftests/bpf/. Signed-off-by: Yafang Shao <laoar.shao@gmail.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20220409125958.92629-3-laoar.shao@gmail.com
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