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2024-04-23selftests/bpf: wq: add bpf_wq_start() checksBenjamin Tissoires
Allows to test if allocation/free works Signed-off-by: Benjamin Tissoires <bentiss@kernel.org> Link: https://lore.kernel.org/r/20240420-bpf_wq-v2-16-6c986a5a741f@kernel.org Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2024-04-23selftests/bpf: wq: add bpf_wq_init() checksBenjamin Tissoires
Allows to test if allocation/free works Signed-off-by: Benjamin Tissoires <bentiss@kernel.org> Link: https://lore.kernel.org/r/20240420-bpf_wq-v2-12-6c986a5a741f@kernel.org Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2024-04-23selftests/bpf: add bpf_wq testsBenjamin Tissoires
We simply try in all supported map types if we can store/load a bpf_wq. Signed-off-by: Benjamin Tissoires <bentiss@kernel.org> Link: https://lore.kernel.org/r/20240420-bpf_wq-v2-10-6c986a5a741f@kernel.org Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2024-04-19selftests/bpf: Use connect_to_addr in sk_assignGeliang Tang
This patch uses public helper connect_to_addr() exported in network_helpers.h instead of the local defined function connect_to_server() in prog_tests/sk_assign.c. This can avoid duplicate code. The code that sets SO_SNDTIMEO timeout as timeo_sec (3s) can be dropped, since connect_to_addr() sets default timeout as 3s. Signed-off-by: Geliang Tang <tanggeliang@kylinos.cn> Link: https://lore.kernel.org/r/98fdd384872bda10b2adb052e900a2212c9047b9.1713427236.git.tanggeliang@kylinos.cn Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
2024-04-19selftests/bpf: Use connect_to_addr in cls_redirectGeliang Tang
This patch uses public helper connect_to_addr() exported in network_helpers.h instead of the local defined function connect_to_server() in prog_tests/cls_redirect.c. This can avoid duplicate code. Signed-off-by: Geliang Tang <tanggeliang@kylinos.cn> Link: https://lore.kernel.org/r/4a03ac92d2d392f8721f398fa449a83ac75577bc.1713427236.git.tanggeliang@kylinos.cn Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
2024-04-19selftests/bpf: Update arguments of connect_to_addrGeliang Tang
Move the third argument "int type" of connect_to_addr() to the first one which is closer to how the socket syscall is doing it. And add a network_helper_opts argument as the fourth one. Then change its usages in sock_addr.c too. Signed-off-by: Geliang Tang <tanggeliang@kylinos.cn> Link: https://lore.kernel.org/r/088ea8a95055f93409c5f57d12f0e58d43059ac4.1713427236.git.tanggeliang@kylinos.cn Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
2024-04-19selftests/bpf: Use start_server_addr in sk_assignGeliang Tang
Include network_helpers.h in prog_tests/sk_assign.c, use the newly added public helper start_server_addr() instead of the local defined function start_server(). This can avoid duplicate code. The code that sets SO_RCVTIMEO timeout as timeo_sec (3s) can be dropped, since start_server_addr() sets default timeout as 3s. Signed-off-by: Geliang Tang <tanggeliang@kylinos.cn> Link: https://lore.kernel.org/r/2af706ffbad63b4f7eaf93a426ed1076eadf1a05.1713427236.git.tanggeliang@kylinos.cn Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
2024-04-19selftests/bpf: Use start_server_addr in cls_redirectGeliang Tang
Include network_helpers.h in prog_tests/cls_redirect.c, use the newly added public helper start_server_addr() instead of the local defined function start_server(). This can avoid duplicate code. Signed-off-by: Geliang Tang <tanggeliang@kylinos.cn> Link: https://lore.kernel.org/r/13f336cb4c6680175d50bb963d9532e11528c758.1713427236.git.tanggeliang@kylinos.cn Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
2024-04-12selftests/bpf: Add read_trace_pipe_iter functionJiri Olsa
We have two printk tests reading trace_pipe in non blocking way, with the very same code. Moving that in new read_trace_pipe_iter function. Current read_trace_pipe is used from samples/bpf and needs to do blocking read and printf of the trace_pipe data, using new read_trace_pipe_iter to implement that. Both printk tests do early checks for the number of found messages and can bail earlier, but I did not find any speed difference w/o that condition, so I did not complicate the change more for that. Some of the samples/bpf programs use read_trace_pipe function, so I kept that interface untouched. I did not see any issues with affected samples/bpf programs other than there's slight change in read_trace_pipe output. The current code uses puts that adds new line after the printed string, so we would occasionally see extra new line. With this patch we read output per lines, so there's no need to use puts and we can use just printf instead without extra new line. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Yonghong Song <yonghong.song@linux.dev> Link: https://lore.kernel.org/bpf/20240410140952.292261-1-jolsa@kernel.org
2024-04-12selftest/bpf: Test a perf BPF program that suppresses side effectsKyle Huey
The test sets a hardware breakpoint and uses a BPF program to suppress the side effects of a perf event sample, including I/O availability signals, SIGTRAPs, and decrementing the event counter limit, if the IP matches the expected value. Then the function with the breakpoint is executed multiple times to test that all effects behave as expected. Signed-off-by: Kyle Huey <khuey@kylehuey.com> Signed-off-by: Ingo Molnar <mingo@kernel.org> Acked-by: Song Liu <song@kernel.org> Acked-by: Jiri Olsa <jolsa@kernel.org> Acked-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/r/20240412015019.7060-8-khuey@kylehuey.com
2024-04-11selftests/bpf: Export send_recv_data helperGeliang Tang
This patch extracts the code to send and receive data into a new helper named send_recv_data() in network_helpers.c and export it in network_helpers.h. This helper will be used for MPTCP BPF selftests. Signed-off-by: Geliang Tang <tanggeliang@kylinos.cn> Link: https://lore.kernel.org/r/5231103be91fadcce3674a589542c63b6a5eedd4.1712813933.git.tanggeliang@kylinos.cn Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
2024-04-11selftests/bpf: Add struct send_recv_argGeliang Tang
Avoid setting total_bytes and stop as global variables, this patch adds a new struct named send_recv_arg to pass arguments between threads. Put these two variables together with fd into this struct and pass it to server thread, so that server thread can access these two variables without setting them as global ones. Signed-off-by: Geliang Tang <tanggeliang@kylinos.cn> Link: https://lore.kernel.org/r/ca1dd703b796f6810985418373e750f7068b4186.1712813933.git.tanggeliang@kylinos.cn Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
2024-04-10selftests/bpf: Add some tests with new bpf_program__attach_sockmap() APIsYonghong Song
Add a few more tests in sockmap_basic.c and sockmap_listen.c to test bpf_link based APIs for SK_MSG and SK_SKB programs. Link attach/detach/update are all tested. All tests are passed. Acked-by: Eduard Zingerman <eddyz87@gmail.com> Reviewed-by: John Fastabend <john.fastabend@gmail.com> Signed-off-by: Yonghong Song <yonghong.song@linux.dev> Link: https://lore.kernel.org/r/20240410043547.3738448-1-yonghong.song@linux.dev Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2024-04-10selftests/bpf: Refactor out helper functions for a few testsYonghong Song
These helper functions will be used later new tests as well. There are no functionality change. Acked-by: Eduard Zingerman <eddyz87@gmail.com> Reviewed-by: John Fastabend <john.fastabend@gmail.com> Signed-off-by: Yonghong Song <yonghong.song@linux.dev> Link: https://lore.kernel.org/r/20240410043542.3738166-1-yonghong.song@linux.dev Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2024-04-09selftests/bpf: Add tests for atomics in bpf_arena.Alexei Starovoitov
Add selftests for atomic instructions in bpf_arena. Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Eduard Zingerman <eddyz87@gmail.com> Link: https://lore.kernel.org/r/20240405231134.17274-2-alexei.starovoitov@gmail.com Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
2024-04-05selftests/bpf: Verify calling core kfuncs from BPF_PROG_TYPE_SYCALLDavid Vernet
Now that we can call some kfuncs from BPF_PROG_TYPE_SYSCALL progs, let's add some selftests that verify as much. As a bonus, let's also verify that we can't call the progs from raw tracepoints. Do do this, we add a new selftest suite called verifier_kfunc_prog_types. Signed-off-by: David Vernet <void@manifault.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Yonghong Song <yonghong.song@linux.dev> Link: https://lore.kernel.org/bpf/20240405143041.632519-3-void@manifault.com
2024-04-05selftests/bpf: Make sure libbpf doesn't enforce the signature of a func pointer.Kui-Feng Lee
The verifier in the kernel ensures that the struct_ops operators behave correctly by checking that they access parameters and context appropriately. The verifier will approve a program as long as it correctly accesses the context/parameters, regardless of its function signature. In contrast, libbpf should not verify the signature of function pointers and functions to enable flexibility in loading various implementations of an operator even if the signature of the function pointer does not match those in the implementations or the kernel. With this flexibility, user space applications can adapt to different kernel versions by loading a specific implementation of an operator based on feature detection. This is a follow-up of the commit c911fc61a7ce ("libbpf: Skip zeroed or null fields if not found in the kernel type.") Signed-off-by: Kui-Feng Lee <thinker.li@gmail.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20240404232342.991414-1-thinker.li@gmail.com
2024-04-05selftests/bpf: add test for bpf_for_each_map_elem() with different mapsPhilo Lu
A test is added for bpf_for_each_map_elem() with either an arraymap or a hashmap. $ tools/testing/selftests/bpf/test_progs -t for_each #93/1 for_each/hash_map:OK #93/2 for_each/array_map:OK #93/3 for_each/write_map_key:OK #93/4 for_each/multi_maps:OK #93 for_each:OK Summary: 1/4 PASSED, 0 SKIPPED, 0 FAILED Signed-off-by: Philo Lu <lulie@linux.alibaba.com> Acked-by: Yonghong Song <yonghong.song@linux.dev> Link: https://lore.kernel.org/r/20240405025536.18113-4-lulie@linux.alibaba.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2024-04-03selftests/bpf: Implement get_hw_ring_size function to retrieve current and ↵Tushar Vyavahare
max interface size Introduce a new function called get_hw_size that retrieves both the current and maximum size of the interface and stores this information in the 'ethtool_ringparam' structure. Remove ethtool_channels struct from xdp_hw_metadata.c due to redefinition error. Remove unused linux/if.h include from flow_dissector BPF test to address CI pipeline failure. Signed-off-by: Tushar Vyavahare <tushar.vyavahare@intel.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Magnus Karlsson <magnus.karlsson@intel.com> Link: https://lore.kernel.org/bpf/20240402114529.545475-4-tushar.vyavahare@intel.com
2024-04-02selftests/bpf: Add pid limit for mptcpify progGeliang Tang
In order to prevent mptcpify prog from affecting the running results of other BPF tests, a pid limit was added to restrict it from only modifying its own program. Suggested-by: Martin KaFai Lau <martin.lau@kernel.org> Signed-off-by: Geliang Tang <tanggeliang@kylinos.cn> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/8987e2938e15e8ec390b85b5dcbee704751359dc.1712054986.git.tanggeliang@kylinos.cn
2024-04-02selftests/bpf: Skip test when perf_event_open returns EOPNOTSUPPPu Lehui
When testing send_signal and stacktrace_build_id_nmi using the riscv sbi pmu driver without the sscofpmf extension or the riscv legacy pmu driver, then failures as follows are encountered: test_send_signal_common:FAIL:perf_event_open unexpected perf_event_open: actual -1 < expected 0 #272/3 send_signal/send_signal_nmi:FAIL test_stacktrace_build_id_nmi:FAIL:perf_event_open err -1 errno 95 #304 stacktrace_build_id_nmi:FAIL The reason is that the above pmu driver or hardware does not support sampling events, that is, PERF_PMU_CAP_NO_INTERRUPT is set to pmu capabilities, and then perf_event_open returns EOPNOTSUPP. Since PERF_PMU_CAP_NO_INTERRUPT is not only set in the riscv-related pmu driver, it is better to skip testing when this capability is set. Signed-off-by: Pu Lehui <pulehui@huawei.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20240402073029.1299085-1-pulehui@huaweicloud.com
2024-03-28selftests/bpf: Drop settimeo in do_testGeliang Tang
settimeo is invoked in start_server() and in connect_fd_to_fd() already, no need to invoke settimeo(lfd, 0) and settimeo(fd, 0) in do_test() anymore. This patch drops them. Signed-off-by: Geliang Tang <tanggeliang@kylinos.cn> Link: https://lore.kernel.org/r/dbc3613bee3b1c78f95ac9ff468bf47c92f106ea.1711447102.git.tanggeliang@kylinos.cn Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
2024-03-28selftests/bpf: Use connect_fd_to_fd in bpf_tcp_caGeliang Tang
To simplify the code, use BPF selftests helper connect_fd_to_fd() in bpf_tcp_ca.c instead of open-coding it. This helper is defined in network_helpers.c, and exported in network_helpers.h, which is already included in bpf_tcp_ca.c. Signed-off-by: Geliang Tang <tanggeliang@kylinos.cn> Link: https://lore.kernel.org/r/e105d1f225c643bee838409378dd90fd9aabb6dc.1711447102.git.tanggeliang@kylinos.cn Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
2024-03-28selftests/bpf: Add a kprobe_multi subtest to use addrs instead of symsYonghong Song
Get addrs directly from available_filter_functions_addrs and send to the kernel during kprobe_multi_attach. This avoids consultation of /proc/kallsyms. But available_filter_functions_addrs is introduced in 6.5, i.e., it is introduced recently, so I skip the test if the kernel does not support it. Signed-off-by: Yonghong Song <yonghong.song@linux.dev> Link: https://lore.kernel.org/r/20240326041523.1200301-1-yonghong.song@linux.dev Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2024-03-28selftests/bpf: Fix kprobe_multi_bench_attach test failure with LTO kernelYonghong Song
In my locally build clang LTO kernel (enabling CONFIG_LTO and CONFIG_LTO_CLANG_THIN), kprobe_multi_bench_attach/kernel subtest failed like: test_kprobe_multi_bench_attach:PASS:get_syms 0 nsec test_kprobe_multi_bench_attach:PASS:kprobe_multi_empty__open_and_load 0 nsec libbpf: prog 'test_kprobe_empty': failed to attach: No such process test_kprobe_multi_bench_attach:FAIL:bpf_program__attach_kprobe_multi_opts unexpected error: -3 #117/1 kprobe_multi_bench_attach/kernel:FAIL There are multiple symbols in /sys/kernel/debug/tracing/available_filter_functions are renamed in /proc/kallsyms due to cross file inlining. One example is for static function __access_remote_vm in mm/memory.c. In a non-LTO kernel, we have the following call stack: ptrace_access_vm (global, kernel/ptrace.c) access_remote_vm (global, mm/memory.c) __access_remote_vm (static, mm/memory.c) With LTO kernel, it is possible that access_remote_vm() is inlined by ptrace_access_vm(). So we end up with the following call stack: ptrace_access_vm (global, kernel/ptrace.c) __access_remote_vm (static, mm/memory.c) The compiler renames __access_remote_vm to __access_remote_vm.llvm.<hash> to prevent potential name collision. The kernel bpf_kprobe_multi_link_attach() and ftrace_lookup_symbols() try to find addresses based on /proc/kallsyms, hence the current test failed with LTO kenrel. This patch consulted /proc/kallsyms to find the corresponding entries for the ksym and this solved the issue. Signed-off-by: Yonghong Song <yonghong.song@linux.dev> Link: https://lore.kernel.org/r/20240326041518.1199758-1-yonghong.song@linux.dev Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2024-03-28selftests/bpf: Refactor some functions for kprobe_multi_testYonghong Song
Refactor some functions in kprobe_multi_test.c to extract some helper functions who will be used in later patches to avoid code duplication. Signed-off-by: Yonghong Song <yonghong.song@linux.dev> Link: https://lore.kernel.org/r/20240326041503.1198982-1-yonghong.song@linux.dev Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2024-03-28selftests/bpf: Replace CHECK with ASSERT macros for ksyms testYonghong Song
Replace CHECK with ASSERT macros for ksyms tests. This test failed earlier with clang lto kernel, but the issue is gone with latest code base. But replacing CHECK with ASSERT still improves code as ASSERT is preferred in selftests. Signed-off-by: Yonghong Song <yonghong.song@linux.dev> Link: https://lore.kernel.org/r/20240326041448.1197812-1-yonghong.song@linux.dev Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2024-03-28selftests/bpf: Test loading bpf-tcp-cc prog calling the kernel tcp-cc kfuncsMartin KaFai Lau
This patch adds a test to ensure all static tcp-cc kfuncs is visible to the struct_ops bpf programs. It is checked by successfully loading the struct_ops programs calling these tcp-cc kfuncs. This patch needs to enable the CONFIG_TCP_CONG_DCTCP and the CONFIG_TCP_CONG_BBR. Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org> Link: https://lore.kernel.org/r/20240322191433.4133280-2-martin.lau@linux.dev Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2024-03-28bpf: improve error message for unsupported helperMykyta Yatsenko
BPF verifier emits "unknown func" message when given BPF program type does not support BPF helper. This message may be confusing for users, as important context that helper is unknown only to current program type is not provided. This patch changes message to "program of this type cannot use helper " and aligns dependent code in libbpf and tests. Any suggestions on improving/changing this message are welcome. Signed-off-by: Mykyta Yatsenko <yatsenko@meta.com> Acked-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Quentin Monnet <qmo@kernel.org> Link: https://lore.kernel.org/r/20240325152210.377548-1-yatsenko@meta.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2024-03-28selftests/bpf: Add BPF_FIB_LOOKUP_MARK testsAnton Protopopov
This patch extends the fib_lookup test suite by adding a few test cases for each IP family to test the new BPF_FIB_LOOKUP_MARK flag to the bpf_fib_lookup: * Test destination IP address selection with and without a mark and/or the BPF_FIB_LOOKUP_MARK flag set Signed-off-by: Anton Protopopov <aspsk@isovalent.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20240326101742.17421-3-aspsk@isovalent.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2024-03-28Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netJakub Kicinski
Cross-merge networking fixes after downstream PR. No conflicts, or adjacent changes. Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2024-03-27bpf: Check bloom filter map value sizeAndrei Matei
This patch adds a missing check to bloom filter creating, rejecting values above KMALLOC_MAX_SIZE. This brings the bloom map in line with many other map types. The lack of this protection can cause kernel crashes for value sizes that overflow int's. Such a crash was caught by syzkaller. The next patch adds more guard-rails at a lower level. Signed-off-by: Andrei Matei <andreimatei1@gmail.com> Acked-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/r/20240327024245.318299-2-andreimatei1@gmail.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2024-03-25selftests/bpf: Fix flaky test btf_map_in_map/lookup_updateYonghong Song
Recently, I frequently hit the following test failure: [root@arch-fb-vm1 bpf]# ./test_progs -n 33/1 test_lookup_update:PASS:skel_open 0 nsec [...] test_lookup_update:PASS:sync_rcu 0 nsec test_lookup_update:FAIL:map1_leak inner_map1 leaked! #33/1 btf_map_in_map/lookup_update:FAIL #33 btf_map_in_map:FAIL In the test, after map is closed and then after two rcu grace periods, it is assumed that map_id is not available to user space. But the above assumption cannot be guaranteed. After zero or one or two rcu grace periods in different siturations, the actual freeing-map-work is put into a workqueue. Later on, when the work is dequeued, the map will be actually freed. See bpf_map_put() in kernel/bpf/syscall.c. By using workqueue, there is no ganrantee that map will be actually freed after a couple of rcu grace periods. This patch removed such map leak detection and then the test can pass consistently. Signed-off-by: Yonghong Song <yonghong.song@linux.dev> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20240322061353.632136-1-yonghong.song@linux.dev
2024-03-25selftests/bpf: Use start_server in bpf_tcp_caGeliang Tang
To simplify the code, use BPF selftests helper start_server() in bpf_tcp_ca.c instead of open-coding it. This helper is defined in network_helpers.c, and exported in network_helpers.h, which is already included in bpf_tcp_ca.c. Signed-off-by: Geliang Tang <tanggeliang@kylinos.cn> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/9926a79118db27dd6d91c4854db011c599cabd0e.1711331517.git.tanggeliang@kylinos.cn
2024-03-19selftests/bpf: add raw_tp/tp_btf BPF cookie subtestsAndrii Nakryiko
Add test validating BPF cookie can be passed during raw_tp/tp_btf attachment and can be retried at runtime with bpf_get_attach_cookie() helper. Acked-by: Stanislav Fomichev <sdf@google.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Message-ID: <20240319233852.1977493-6-andrii@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2024-03-19selftests/bpf: Add a sk_msg prog bpf_get_ns_current_pid_tgid() testYonghong Song
Add a sk_msg bpf program test where the program is running in a pid namespace. The test is successful: #165/4 ns_current_pid_tgid/new_ns_sk_msg:OK Signed-off-by: Yonghong Song <yonghong.song@linux.dev> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20240315184915.2976718-1-yonghong.song@linux.dev
2024-03-19selftests/bpf: Add a cgroup prog bpf_get_ns_current_pid_tgid() testYonghong Song
Add a cgroup bpf program test where the bpf program is running in a pid namespace. The test is successfully: #165/3 ns_current_pid_tgid/new_ns_cgrp:OK Signed-off-by: Yonghong Song <yonghong.song@linux.dev> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20240315184910.2976522-1-yonghong.song@linux.dev
2024-03-19selftests/bpf: Refactor out some functions in ns_current_pid_tgid testYonghong Song
Refactor some functions in both user space code and bpf program as these functions are used by later cgroup/sk_msg tests. Another change is to mark tp program optional loading as later patches will use optional loading as well since they have quite different attachment and testing logic. There is no functionality change. Signed-off-by: Yonghong Song <yonghong.song@linux.dev> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20240315184904.2976123-1-yonghong.song@linux.dev
2024-03-19selftests/bpf: Replace CHECK with ASSERT_* in ns_current_pid_tgid testYonghong Song
Replace CHECK in selftest ns_current_pid_tgid with recommended ASSERT_* style. I also shortened subtest name as the prefix of subtest name is covered by the test name already. This patch does fix a testing issue. Currently even if bss->user_{pid,tgid} is not correct, the test still passed since the clone func returns 0. I fixed it to return a non-zero value if bss->user_{pid,tgid} is incorrect. Signed-off-by: Yonghong Song <yonghong.song@linux.dev> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Jiri Olsa <jolsa@kernel.org> Link: https://lore.kernel.org/bpf/20240315184859.2975543-1-yonghong.song@linux.dev
2024-03-15selftests/bpf: Add arena test case for 4Gbyte corner caseAlexei Starovoitov
Check that 4Gbyte arena can be allocated and overflow/underflow access in the first and the last page behaves as expected. Signed-off-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Stanislav Fomichev <sdf@google.com> Link: https://lore.kernel.org/bpf/20240315021834.62988-5-alexei.starovoitov@gmail.com
2024-03-15selftests/bpf: Remove hard coded PAGE_SIZE macro.Alexei Starovoitov
Remove hard coded PAGE_SIZE. Add #include <sys/user.h> instead (that works on x86-64 and s390) and fallback to slow getpagesize() for aarch64. Signed-off-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Stanislav Fomichev <sdf@google.com> Link: https://lore.kernel.org/bpf/20240315021834.62988-4-alexei.starovoitov@gmail.com
2024-03-14selftests/bpf: Ensure libbpf skip all-zeros fields of struct_ops maps.Kui-Feng Lee
A new version of a type may have additional fields that do not exist in older versions. Previously, libbpf would reject struct_ops maps with a new version containing extra fields when running on a machine with an old kernel. However, we have updated libbpf to ignore these fields if their values are all zeros or null in order to provide backward compatibility. Signed-off-by: Kui-Feng Lee <thinker.li@gmail.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20240313214139.685112-3-thinker.li@gmail.com
2024-03-11Merge tag 'for-netdev' of ↵Jakub Kicinski
https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next Alexei Starovoitov says: ==================== pull-request: bpf-next 2024-03-11 We've added 59 non-merge commits during the last 9 day(s) which contain a total of 88 files changed, 4181 insertions(+), 590 deletions(-). The main changes are: 1) Enforce VM_IOREMAP flag and range in ioremap_page_range and introduce VM_SPARSE kind and vm_area_[un]map_pages to be used in bpf_arena, from Alexei. 2) Introduce bpf_arena which is sparse shared memory region between bpf program and user space where structures inside the arena can have pointers to other areas of the arena, and pointers work seamlessly for both user-space programs and bpf programs, from Alexei and Andrii. 3) Introduce may_goto instruction that is a contract between the verifier and the program. The verifier allows the program to loop assuming it's behaving well, but reserves the right to terminate it, from Alexei. 4) Use IETF format for field definitions in the BPF standard document, from Dave. 5) Extend struct_ops libbpf APIs to allow specify version suffixes for stuct_ops map types, share the same BPF program between several map definitions, and other improvements, from Eduard. 6) Enable struct_ops support for more than one page in trampolines, from Kui-Feng. 7) Support kCFI + BPF on riscv64, from Puranjay. 8) Use bpf_prog_pack for arm64 bpf trampoline, from Puranjay. 9) Fix roundup_pow_of_two undefined behavior on 32-bit archs, from Toke. ==================== Link: https://lore.kernel.org/r/20240312003646.8692-1-alexei.starovoitov@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2024-03-11selftests/bpf: Add bpf_arena_htab test.Alexei Starovoitov
bpf_arena_htab.h - hash table implemented as bpf program Signed-off-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20240308010812.89848-15-alexei.starovoitov@gmail.com
2024-03-11selftests/bpf: Add bpf_arena_list test.Alexei Starovoitov
bpf_arena_alloc.h - implements page_frag allocator as a bpf program. bpf_arena_list.h - doubly linked link list as a bpf program. Compiled as a bpf program and as native C code. Signed-off-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20240308010812.89848-14-alexei.starovoitov@gmail.com
2024-03-11selftests/bpf: Add unit tests for bpf_arena_alloc/free_pagesAlexei Starovoitov
Add unit tests for bpf_arena_alloc/free_pages() functionality and bpf_arena_common.h with a set of common helpers and macros that is used in this test and the following patches. Also modify test_loader that didn't support running bpf_prog_type_syscall programs. Signed-off-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20240308010812.89848-13-alexei.starovoitov@gmail.com
2024-03-07Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netJakub Kicinski
Cross-merge networking fixes after downstream PR. No conflicts. Adjacent changes: net/core/page_pool_user.c 0b11b1c5c320 ("netdev: let netlink core handle -EMSGSIZE errors") 429679dcf7d9 ("page_pool: fix netlink dump stop/resume") Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2024-03-06selftests/bpf: Test cases for '?' in BTF namesEduard Zingerman
Two test cases to verify that '?' and other printable characters are allowed in BTF DATASEC names: - DATASEC with name "?.foo bar:buz" should be accepted; - type with name "?foo" should be rejected. Signed-off-by: Eduard Zingerman <eddyz87@gmail.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20240306104529.6453-16-eddyz87@gmail.com
2024-03-06selftests/bpf: Test case for SEC("?.struct_ops")Eduard Zingerman
Check that "?.struct_ops" and "?.struct_ops.link" section names define struct_ops maps with autocreate == false after open. Signed-off-by: Eduard Zingerman <eddyz87@gmail.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20240306104529.6453-14-eddyz87@gmail.com
2024-03-06selftests/bpf: Verify struct_ops autoload/autocreate syncEduard Zingerman
Check that autocreate flags of struct_ops map cause autoload of struct_ops corresponding programs: - when struct_ops program is referenced only from a map for which autocreate is set to false, that program should not be loaded; - when struct_ops program with autoload == false is set to be used from a map with autocreate == true using shadow var, that program should be loaded; - when struct_ops program is not referenced from any map object load should fail. Signed-off-by: Eduard Zingerman <eddyz87@gmail.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20240306104529.6453-10-eddyz87@gmail.com
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