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2019-10-17selftests/bpf: Switch test_maps to test_progs' test.h formatAndrii Nakryiko2-11/+5
Make test_maps use tests.h header format consistent with the one used by test_progs, to facilitate unification. Signed-off-by: Andrii Nakryiko <[email protected]> Signed-off-by: Alexei Starovoitov <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
2019-10-17selftests/bpf: Make CO-RE reloc test impartial to test_progs flavorAndrii Nakryiko3-4/+5
test_core_reloc_kernel test captures its own process name and validates it as part of the test. Given extra "flavors" of test_progs, this break for anything by default test_progs binary. Fix the test to cut out flavor part of the process name. Fixes: ee2eb063d330 ("selftests/bpf: Add BPF_CORE_READ and BPF_CORE_READ_STR_INTO macro tests") Signed-off-by: Andrii Nakryiko <[email protected]> Signed-off-by: Alexei Starovoitov <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
2019-10-17selftests/bpf: Teach test_progs to cd into subdirAndrii Nakryiko1-1/+32
We are building a bunch of "flavors" of test_progs, e.g., w/ alu32 flag for Clang when building BPF object. test_progs setup is relying on having all the BPF object files and extra resources to be available in current working directory, though. But we actually build all these files into a separate sub-directory. Next set of patches establishes convention of naming "flavored" test_progs (and test runner binaries in general) as test_progs-flavor (e.g., test_progs-alu32), for each such extra flavor. This patch teaches test_progs binary to automatically detect its own extra flavor based on its argv[0], and if present, to change current directory to a flavor-specific subdirectory. Signed-off-by: Andrii Nakryiko <[email protected]> Signed-off-by: Alexei Starovoitov <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
2019-10-17selftests/bpf: Restore the netns after flow dissector reattach testJakub Sitnicki1-4/+17
flow_dissector_reattach test changes the netns we run in but does not restore it to the one we started in when finished. This interferes with tests that run after it. Fix it by restoring the netns when done. Fixes: f97eea1756f3 ("selftests/bpf: Check that flow dissector can be re-attached") Reported-by: Alexei Starovoitov <[email protected]> Reported-by: Andrii Nakryiko <[email protected]> Signed-off-by: Jakub Sitnicki <[email protected]> Signed-off-by: Alexei Starovoitov <[email protected]> Acked-by: Martin KaFai Lau <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
2019-10-17selftests/bpf: Add kfree_skb raw_tp testAlexei Starovoitov2-0/+192
Load basic cls_bpf program. Load raw_tracepoint program and attach to kfree_skb raw tracepoint. Trigger cls_bpf via prog_test_run. At the end of test_run kernel will call kfree_skb which will trigger trace_kfree_skb tracepoint. Which will call our raw_tracepoint program. Which will take that skb and will dump it into perf ring buffer. Check that user space received correct packet. Signed-off-by: Alexei Starovoitov <[email protected]> Signed-off-by: Daniel Borkmann <[email protected]> Acked-by: Andrii Nakryiko <[email protected]> Acked-by: Martin KaFai Lau <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
2019-10-15selftests: bpf: Don't try to read files without read permissionJiri Pirko1-1/+1
Recently couple of files that are write only were added to netdevsim debugfs. Don't read these files and avoid error. Reported-by: kernel test robot <[email protected]> Signed-off-by: Jiri Pirko <[email protected]> Signed-off-by: Alexei Starovoitov <[email protected]> Acked-by: Jakub Kicinski <[email protected]>
2019-10-15selftests: bpf: Add selftest for __sk_buff tstampStanislav Fomichev2-0/+6
Make sure BPF_PROG_TEST_RUN accepts tstamp and exports any modifications that BPF program does. Signed-off-by: Stanislav Fomichev <[email protected]> Signed-off-by: Alexei Starovoitov <[email protected]> Acked-by: Martin KaFai Lau <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
2019-10-15selftests/bpf: Add field existence CO-RE relocs testsAndrii Nakryiko11-2/+233
Add a bunch of tests validating CO-RE is handling field existence relocation. Relaxed CO-RE relocation mode is activated for these new tests to prevent libbpf from rejecting BPF object for no-match relocation, even though test BPF program is not going to use that relocation, if field is missing. Signed-off-by: Andrii Nakryiko <[email protected]> Signed-off-by: Alexei Starovoitov <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
2019-10-12selftests/bpf: Remove obsolete pahole/BTF support detectionAndrii Nakryiko1-48/+6
Given lots of selftests won't work without recent enough Clang/LLVM that fully supports BTF, there is no point in maintaining outdated BTF support detection and fall-back to pahole logic. Just assume we have everything we need. Signed-off-by: Andrii Nakryiko <[email protected]> Signed-off-by: Alexei Starovoitov <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
2019-10-12selftests/bpf: Enforce libbpf build before BPF programs are builtAndrii Nakryiko1-1/+2
Given BPF programs rely on libbpf's bpf_helper_defs.h, which is auto-generated during libbpf build, libbpf build has to happen before we attempt progs/*.c build. Enforce it as order-only dependency. Fixes: 24f25763d6de ("libbpf: auto-generate list of BPF helper definitions") Signed-off-by: Andrii Nakryiko <[email protected]> Signed-off-by: Alexei Starovoitov <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
2019-10-11selftests/bpf: Check that flow dissector can be re-attachedJakub Sitnicki1-0/+127
Make sure a new flow dissector program can be attached to replace the old one with a single syscall. Also check that attaching the same program twice is prohibited. Signed-off-by: Jakub Sitnicki <[email protected]> Signed-off-by: Daniel Borkmann <[email protected]> Reviewed-by: Stanislav Fomichev <[email protected]> Acked-by: Martin KaFai Lau <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
2019-10-11selftests/bpf: Add read-only map values propagation testsAndrii Nakryiko2-0/+182
Add tests checking that verifier does proper constant propagation for read-only maps. If constant propagation didn't work, skipp_loop and part_loop BPF programs would be rejected due to BPF verifier otherwise not being able to prove they ever complete. With constant propagation, though, they are succesfully validated as properly terminating loops. Signed-off-by: Andrii Nakryiko <[email protected]> Signed-off-by: Daniel Borkmann <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
2019-10-09selftests/bpf: Fix btf_dump padding test caseAndrii Nakryiko1-1/+4
Existing padding test case for btf_dump has a good test that was supposed to test padding generation at the end of a struct, but its expected output was specified incorrectly. Fix this. Fixes: 2d2a3ad872f8 ("selftests/bpf: add btf_dump BTF-to-C conversion tests") Reported-by: John Fastabend <[email protected]> Signed-off-by: Andrii Nakryiko <[email protected]> Signed-off-by: Alexei Starovoitov <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
2019-10-09selftests/bpf: Convert test_btf_dump into test_progs testAndrii Nakryiko2-55/+35
Convert test_btf_dump into a part of test_progs, instead of a stand-alone test binary. Signed-off-by: Andrii Nakryiko <[email protected]> Signed-off-by: Alexei Starovoitov <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
2019-10-08selftests/bpf: More compatible nc options in test_lwt_ip_encapJiri Benc1-3/+3
Out of the three nc implementations widely in use, at least two (BSD netcat and nmap-ncat) do not support -l combined with -s. Modify the nc invocation to be accepted by all of them. Fixes: 17a90a788473 ("selftests/bpf: test that GSO works in lwt_ip_encap") Signed-off-by: Jiri Benc <[email protected]> Signed-off-by: Daniel Borkmann <[email protected]> Link: https://lore.kernel.org/bpf/9f177682c387f3f943bb64d849e6c6774df3c5b4.1570539863.git.jbenc@redhat.com
2019-10-08selftests/bpf: Set rp_filter in test_flow_dissectorJiri Benc1-0/+3
Many distributions enable rp_filter. However, the flow dissector test generates packets that have 1.1.1.1 set as (inner) source address without this address being reachable. This causes the selftest to fail. The selftests should not assume a particular initial configuration. Switch off rp_filter. Fixes: 50b3ed57dee9 ("selftests/bpf: test bpf flow dissection") Signed-off-by: Jiri Benc <[email protected]> Signed-off-by: Daniel Borkmann <[email protected]> Acked-by: Petar Penkov <[email protected]> Link: https://lore.kernel.org/bpf/513a298f53e99561d2f70b2e60e2858ea6cda754.1570539863.git.jbenc@redhat.com
2019-10-08selftests/bpf: Add BPF_CORE_READ and BPF_CORE_READ_STR_INTO macro testsAndrii Nakryiko3-3/+68
Validate BPF_CORE_READ correctness and handling of up to 9 levels of nestedness using cyclic task->(group_leader->)*->tgid chains. Also add a test of maximum-dpeth BPF_CORE_READ_STR_INTO() macro. Signed-off-by: Andrii Nakryiko <[email protected]> Signed-off-by: Daniel Borkmann <[email protected]> Acked-by: John Fastabend <[email protected]> Acked-by: Song Liu <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
2019-10-08libbpf: Add BPF_CORE_READ/BPF_CORE_READ_INTO helpersAndrii Nakryiko9-0/+9
Add few macros simplifying BCC-like multi-level probe reads, while also emitting CO-RE relocations for each read. Signed-off-by: Andrii Nakryiko <[email protected]> Signed-off-by: Daniel Borkmann <[email protected]> Acked-by: John Fastabend <[email protected]> Acked-by: Song Liu <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
2019-10-08libbpf: Move bpf_{helpers, helper_defs, endian, tracing}.h into libbpfAndrii Nakryiko5-330/+3
Move bpf_helpers.h, bpf_tracing.h, and bpf_endian.h into libbpf. Move bpf_helper_defs.h generation into libbpf's Makefile. Ensure all those headers are installed along the other libbpf headers. Also, adjust selftests and samples include path to include libbpf now. Signed-off-by: Andrii Nakryiko <[email protected]> Signed-off-by: Daniel Borkmann <[email protected]> Acked-by: Song Liu <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
2019-10-08selftests/bpf: Split off tracing-only helpers into bpf_tracing.hAndrii Nakryiko5-190/+198
Split-off PT_REGS-related helpers into bpf_tracing.h header. Adjust selftests and samples to include it where necessary. Signed-off-by: Andrii Nakryiko <[email protected]> Signed-off-by: Daniel Borkmann <[email protected]> Acked-by: John Fastabend <[email protected]> Acked-by: Song Liu <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
2019-10-08selftests/bpf: Adjust CO-RE reloc tests for new bpf_core_read() macroAndrii Nakryiko10-40/+58
To allow adding a variadic BPF_CORE_READ macro with slightly different syntax and semantics, define CORE_READ in CO-RE reloc tests, which is a thin wrapper around low-level bpf_core_read() macro, which in turn is just a wrapper around bpf_probe_read(). Signed-off-by: Andrii Nakryiko <[email protected]> Signed-off-by: Daniel Borkmann <[email protected]> Acked-by: John Fastabend <[email protected]> Acked-by: Song Liu <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
2019-10-08selftests/bpf: samples/bpf: Split off legacy stuff from bpf_helpers.hAndrii Nakryiko6-37/+54
Split off few legacy things from bpf_helpers.h into separate bpf_legacy.h file: - load_{byte|half|word}; - remove extra inner_idx and numa_node fields from bpf_map_def and introduce bpf_map_def_legacy for use in samples; - move BPF_ANNOTATE_KV_PAIR into bpf_legacy.h. Adjust samples and selftests accordingly by either including bpf_legacy.h and using bpf_map_def_legacy, or switching to BTF-defined maps altogether. Signed-off-by: Andrii Nakryiko <[email protected]> Signed-off-by: Daniel Borkmann <[email protected]> Acked-by: John Fastabend <[email protected]> Acked-by: Song Liu <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
2019-10-08selftests/bpf: Undo GCC-specific bpf_helpers.h changesAndrii Nakryiko1-8/+0
Having GCC provide its own bpf-helper.h is not the right approach and is going to be changed. Undo bpf_helpers.h change before moving bpf_helpers.h into libbpf. Signed-off-by: Andrii Nakryiko <[email protected]> Signed-off-by: Daniel Borkmann <[email protected]> Acked-by: Song Liu <[email protected]> Acked-by: Ilya Leoshkevich <[email protected]> Acked-by: John Fastabend <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
2019-10-07selftests/bpf: add test for BPF flow dissector in the root namespaceStanislav Fomichev1-6/+42
Make sure non-root namespaces get an error if root flow dissector is attached. Cc: Petar Penkov <[email protected]> Acked-by: Song Liu <[email protected]> Signed-off-by: Stanislav Fomichev <[email protected]> Signed-off-by: Alexei Starovoitov <[email protected]>
2019-10-07selftests/bpf: Fix dependency ordering for attach_probe testAndrii Nakryiko1-2/+2
Current Makefile dependency chain is not strict enough and allows test_attach_probe.o to be built before test_progs's prog_test/attach_probe.o is built, which leads to assembler complaining about missing included binary. This patch is a minimal fix to fix this issue by enforcing that test_attach_probe.o (BPF object file) is built before prog_tests/attach_probe.c is attempted to be compiled. Fixes: 928ca75e59d7 ("selftests/bpf: switch tests to new bpf_object__open_{file, mem}() APIs") Signed-off-by: Andrii Nakryiko <[email protected]> Signed-off-by: Alexei Starovoitov <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
2019-10-06libbpf: auto-generate list of BPF helper definitionsAndrii Nakryiko3-264/+9
Get rid of list of BPF helpers in bpf_helpers.h (irony...) and auto-generate it into bpf_helpers_defs.h, which is now included from bpf_helpers.h. Suggested-by: Alexei Starovoitov <[email protected]> Signed-off-by: Andrii Nakryiko <[email protected]> Signed-off-by: Alexei Starovoitov <[email protected]>
2019-10-05selftests/bpf: switch tests to new bpf_object__open_{file, mem}() APIsAndrii Nakryiko3-8/+59
Verify new bpf_object__open_mem() and bpf_object__open_file() APIs work as expected by switching test_attach_probe test to use embedded BPF object and bpf_object__open_mem() and test_reference_tracking to bpf_object__open_file(). Signed-off-by: Andrii Nakryiko <[email protected]> Signed-off-by: Alexei Starovoitov <[email protected]>
2019-10-05libbpf: stop enforcing kern_version, populate it for usersAndrii Nakryiko4-4/+0
Kernel version enforcement for kprobes/kretprobes was removed from 5.0 kernel in 6c4fc209fcf9 ("bpf: remove useless version check for prog load"). Since then, BPF programs were specifying SEC("version") just to please libbpf. We should stop enforcing this in libbpf, if even kernel doesn't care. Furthermore, libbpf now will pre-populate current kernel version of the host system, in case we are still running on old kernel. This patch also removes __bpf_object__open_xattr from libbpf.h, as nothing in libbpf is relying on having it in that header. That function was never exported as LIBBPF_API and even name suggests its internal version. So this should be safe to remove, as it doesn't break ABI. Signed-off-by: Andrii Nakryiko <[email protected]> Signed-off-by: Alexei Starovoitov <[email protected]>
2019-10-05libbpf: Fix BTF-defined map's __type macro handling of arraysAndrii Nakryiko2-3/+2
Due to a quirky C syntax of declaring pointers to array or function prototype, existing __type() macro doesn't work with map key/value types that are array or function prototype. One has to create a typedef first and use it to specify key/value type for a BPF map. By using typeof(), pointer to type is now handled uniformly for all kinds of types. Convert one of self-tests as a demonstration. Signed-off-by: Andrii Nakryiko <[email protected]> Signed-off-by: Alexei Starovoitov <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
2019-10-04bpf: Add loop test case with 32 bit reg comparison against 0Daniel Borkmann1-0/+17
Add a loop test with 32 bit register against 0 immediate: # ./test_verifier 631 #631/p taken loop with back jump to 1st insn, 2 OK Disassembly: [...] 1b: test %edi,%edi 1d: jne 0x0000000000000014 [...] Pretty much similar to prior "taken loop with back jump to 1st insn" test case just as jmp32 variant. Signed-off-by: Daniel Borkmann <[email protected]> Signed-off-by: Alexei Starovoitov <[email protected]> Acked-by: Song Liu <[email protected]>
2019-10-03selftests/bpf: Correct path to include msg + pathIvan Khoronzhuk1-1/+1
The "path" buf is supposed to contain path + printf msg up to 24 bytes. It will be cut anyway, but compiler generates truncation warns like: " samples/bpf/../../tools/testing/selftests/bpf/cgroup_helpers.c: In function ‘setup_cgroup_environment’: samples/bpf/../../tools/testing/selftests/bpf/cgroup_helpers.c:52:34: warning: ‘/cgroup.controllers’ directive output may be truncated writing 19 bytes into a region of size between 1 and 4097 [-Wformat-truncation=] snprintf(path, sizeof(path), "%s/cgroup.controllers", cgroup_path); ^~~~~~~~~~~~~~~~~~~ samples/bpf/../../tools/testing/selftests/bpf/cgroup_helpers.c:52:2: note: ‘snprintf’ output between 20 and 4116 bytes into a destination of size 4097 snprintf(path, sizeof(path), "%s/cgroup.controllers", cgroup_path); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ samples/bpf/../../tools/testing/selftests/bpf/cgroup_helpers.c:72:34: warning: ‘/cgroup.subtree_control’ directive output may be truncated writing 23 bytes into a region of size between 1 and 4097 [-Wformat-truncation=] snprintf(path, sizeof(path), "%s/cgroup.subtree_control", ^~~~~~~~~~~~~~~~~~~~~~~ cgroup_path); samples/bpf/../../tools/testing/selftests/bpf/cgroup_helpers.c:72:2: note: ‘snprintf’ output between 24 and 4120 bytes into a destination of size 4097 snprintf(path, sizeof(path), "%s/cgroup.subtree_control", cgroup_path); " In order to avoid warns, lets decrease buf size for cgroup workdir on 24 bytes with assumption to include also "/cgroup.subtree_control" to the address. The cut will never happen anyway. Signed-off-by: Ivan Khoronzhuk <[email protected]> Signed-off-by: Daniel Borkmann <[email protected]> Acked-by: Song Liu <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
2019-10-03selftests/bpf: Add static to enable_all_controllers()Ivan Khoronzhuk1-1/+1
Add static to enable_all_controllers() to get rid from annoying warning during samples/bpf build: samples/bpf/../../tools/testing/selftests/bpf/cgroup_helpers.c:44:5: warning: no previous prototype for ‘enable_all_controllers’ [-Wmissing-prototypes] int enable_all_controllers(char *cgroup_path) Signed-off-by: Ivan Khoronzhuk <[email protected]> Signed-off-by: Daniel Borkmann <[email protected]> Acked-by: Song Liu <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
2019-10-02selftests/bpf: test_progs: Don't leak server_fd in test_sockopt_inheritBrian Vazquez1-1/+1
server_fd needs to be closed if pthread can't be created. Fixes: e3e02e1d9c24 ("selftests/bpf: test_progs: convert test_sockopt_inherit") Signed-off-by: Brian Vazquez <[email protected]> Signed-off-by: Daniel Borkmann <[email protected]> Reviewed-by: Stanislav Fomichev <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
2019-10-02selftests/bpf: test_progs: Don't leak server_fd in tcp_rttBrian Vazquez1-1/+2
server_fd needs to be closed if pthread can't be created. Fixes: 8a03222f508b ("selftests/bpf: test_progs: fix client/server race in tcp_rtt") Signed-off-by: Brian Vazquez <[email protected]> Signed-off-by: Daniel Borkmann <[email protected]> Reviewed-by: Stanislav Fomichev <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
2019-09-25selftests/bpf: adjust strobemeta loop to satisfy latest clangAndrii Nakryiko1-1/+4
Some recent changes in latest Clang started causing the following warning when unrolling strobemeta test case main loop: progs/strobemeta.h:416:2: warning: loop not unrolled: the optimizer was unable to perform the requested transformation; the transformation might be disabled or specified as part of an unsupported transformation ordering [-Wpass-failed=transform-warning] This patch simplifies loop's exit condition to depend only on constant max iteration number (STROBE_MAX_MAP_ENTRIES), while moving early termination logic inside the loop body. The changes are equivalent from program logic standpoint, but fixes the warning. It also appears to improve generated BPF code, as it fixes previously failing non-unrolled strobemeta test cases. Cc: Alexei Starovoitov <[email protected]> Signed-off-by: Andrii Nakryiko <[email protected]> Signed-off-by: Daniel Borkmann <[email protected]>
2019-09-25selftests/bpf: delete unused variables in test_sysctlAndrii Nakryiko1-1/+0
Remove no longer used variables and avoid compiler warnings. Signed-off-by: Andrii Nakryiko <[email protected]> Signed-off-by: Daniel Borkmann <[email protected]>
2019-09-25selftests/bpf: test_progs: fix client/server race in tcp_rttStanislav Fomichev1-2/+19
This is the same problem I found earlier in test_sockopt_inherit: there is a race between server thread doing accept() and client thread doing connect(). Let's explicitly synchronize them via pthread conditional variable. v2: * don't exit from server_thread without signaling condvar, fixes possible issue where main() would wait forever (Andrii Nakryiko) Fixes: b55873984dab ("selftests/bpf: test BPF_SOCK_OPS_RTT_CB") Signed-off-by: Stanislav Fomichev <[email protected]> Signed-off-by: Daniel Borkmann <[email protected]>
2019-09-16bpf: fix accessing bpf_sysctl.file_pos on s390Ilya Leoshkevich1-1/+8
"ctx:file_pos sysctl:read write ok" fails on s390 with "Read value != nux". This is because verifier rewrites a complete 32-bit bpf_sysctl.file_pos update to a partial update of the first 32 bits of 64-bit *bpf_sysctl_kern.ppos, which is not correct on big-endian systems. Fix by using an offset on big-endian systems. Ditto for bpf_sysctl.file_pos reads. Currently the test does not detect a problem there, since it expects to see 0, which it gets with high probability in error cases, so change it to seek to offset 3 and expect 3 in bpf_sysctl.file_pos. Fixes: e1550bfe0de4 ("bpf: Add file_pos field to bpf_sysctl ctx") Signed-off-by: Ilya Leoshkevich <[email protected]> Acked-by: Yonghong Song <[email protected]> Signed-off-by: Daniel Borkmann <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]/
2019-09-16selftests/bpf: add bpf-gcc supportIlya Leoshkevich3-23/+67
Now that binutils and gcc support for BPF is upstream, make use of it in BPF selftests using alu32-like approach. Share as much as possible of CFLAGS calculation with clang. Fixes only obvious issues, leaving more complex ones for later: - Use gcc-provided bpf-helpers.h instead of manually defining the helpers, change bpf_helpers.h include guard to avoid conflict. - Include <linux/stddef.h> for __always_inline. - Add $(OUTPUT)/../usr/include to include path in order to use local kernel headers instead of system kernel headers when building with O=. In order to activate the bpf-gcc support, one needs to configure binutils and gcc with --target=bpf and make them available in $PATH. In particular, gcc must be installed as `bpf-gcc`, which is the default. Right now with binutils 25a2915e8dba and gcc r275589 only a handful of tests work: # ./test_progs_bpf_gcc # Summary: 7/39 PASSED, 1 SKIPPED, 98 FAILED The reason for those failures are as follows: - Build errors: - `error: too many function arguments for eBPF` for __always_inline functions read_str_var and read_map_var - must be inlining issue, and for process_l3_headers_v6, which relies on optimizing away function arguments. - `error: indirect call in function, which are not supported by eBPF` where there are no obvious indirect calls in the source calls, e.g. in __encap_ipip_none. - `error: field 'lock' has incomplete type` for fields of `struct bpf_spin_lock` type - bpf_spin_lock is re#defined by bpf-helpers.h, so its usage is sensitive to order of #includes. - `error: eBPF stack limit exceeded` in sysctl_tcp_mem. - Load errors: - Missing object files due to above build errors. - `libbpf: failed to create map (name: 'test_ver.bss')`. - `libbpf: object file doesn't contain bpf program`. - `libbpf: Program '.text' contains unrecognized relo data pointing to section 0`. - `libbpf: BTF is required, but is missing or corrupted` - no BTF support in gcc yet. Signed-off-by: Ilya Leoshkevich <[email protected]> Cc: Jose E. Marchesi <[email protected]> Signed-off-by: Daniel Borkmann <[email protected]>
2019-09-06selftests/bpf: test_progs: convert test_tcp_rttStanislav Fomichev3-59/+28
Move the files, adjust includes, remove entry from Makefile & .gitignore Signed-off-by: Stanislav Fomichev <[email protected]> Signed-off-by: Alexei Starovoitov <[email protected]>
2019-09-06selftests/bpf: test_progs: convert test_sockopt_inheritStanislav Fomichev3-64/+43
Move the files, adjust includes, remove entry from Makefile & .gitignore I also added pthread_cond_wait for the server thread startup. We don't want to connect to the server that's not yet up (for some reason this existing race is now more prominent with test_progs). Signed-off-by: Stanislav Fomichev <[email protected]> Signed-off-by: Alexei Starovoitov <[email protected]>
2019-09-06selftests/bpf: test_progs: convert test_sockopt_multiStanislav Fomichev3-55/+11
Move the files, adjust includes, remove entry from Makefile & .gitignore Signed-off-by: Stanislav Fomichev <[email protected]> Signed-off-by: Alexei Starovoitov <[email protected]>
2019-09-06selftests/bpf: test_progs: convert test_sockopt_skStanislav Fomichev4-52/+15
Move the files, adjust includes, remove entry from Makefile & .gitignore Signed-off-by: Stanislav Fomichev <[email protected]> Signed-off-by: Alexei Starovoitov <[email protected]>
2019-09-06selftests/bpf: test_progs: convert test_sockoptStanislav Fomichev3-46/+8
Move the files, adjust includes, remove entry from Makefile & .gitignore Signed-off-by: Stanislav Fomichev <[email protected]> Signed-off-by: Alexei Starovoitov <[email protected]>
2019-09-06selftests/bpf: test_progs: add test__join_cgroup helperStanislav Fomichev3-2/+41
test__join_cgroup() combines the following operations that usually go hand in hand and returns cgroup fd: * setup cgroup environment (make sure cgroupfs is mounted) * mkdir cgroup * join cgroup It also marks a test as a "cgroup cleanup needed" and removes cgroup state after the test is done. Signed-off-by: Stanislav Fomichev <[email protected]> Signed-off-by: Alexei Starovoitov <[email protected]>
2019-09-06Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-nextDavid S. Miller39-250/+1029
Daniel Borkmann says: ==================== The following pull-request contains BPF updates for your *net-next* tree. The main changes are: 1) Add the ability to use unaligned chunks in the AF_XDP umem. By relaxing where the chunks can be placed, it allows to use an arbitrary buffer size and place whenever there is a free address in the umem. Helps more seamless DPDK AF_XDP driver integration. Support for i40e, ixgbe and mlx5e, from Kevin and Maxim. 2) Addition of a wakeup flag for AF_XDP tx and fill rings so the application can wake up the kernel for rx/tx processing which avoids busy-spinning of the latter, useful when app and driver is located on the same core. Support for i40e, ixgbe and mlx5e, from Magnus and Maxim. 3) bpftool fixes for printf()-like functions so compiler can actually enforce checks, bpftool build system improvements for custom output directories, and addition of 'bpftool map freeze' command, from Quentin. 4) Support attaching/detaching XDP programs from 'bpftool net' command, from Daniel. 5) Automatic xskmap cleanup when AF_XDP socket is released, and several barrier/{read,write}_once fixes in AF_XDP code, from Björn. 6) Relicense of bpf_helpers.h/bpf_endian.h for future libbpf inclusion as well as libbpf versioning improvements, from Andrii. 7) Several new BPF kselftests for verifier precision tracking, from Alexei. 8) Several BPF kselftest fixes wrt endianess to run on s390x, from Ilya. 9) And more BPF kselftest improvements all over the place, from Stanislav. 10) Add simple BPF map op cache for nfp driver to batch dumps, from Jakub. 11) AF_XDP socket umem mapping improvements for 32bit archs, from Ivan. 12) Add BPF-to-BPF call and BTF line info support for s390x JIT, from Yauheni. 13) Small optimization in arm64 JIT to spare 1 insns for BPF_MOD, from Jerin. 14) Fix an error check in bpf_tcp_gen_syncookie() helper, from Petar. 15) Various minor fixes and cleanups, from Nathan, Masahiro, Masanari, Peter, Wei, Yue. ==================== Signed-off-by: David S. Miller <[email protected]>
2019-09-05selftests/bpf: precision tracking testsAlexei Starovoitov1-0/+52
Add two tests to check that stack slot marking during backtracking doesn't trigger 'spi > allocated_stack' warning. One test is using BPF_ST insn. Another is using BPF_STX. Signed-off-by: Alexei Starovoitov <[email protected]> Signed-off-by: Daniel Borkmann <[email protected]>
2019-09-03selftests/bpf: fix endianness issues in test_sysctlIlya Leoshkevich1-43/+82
A lot of test_sysctl sub-tests fail due to handling strings as a bunch of immediate values in a little-endian-specific manner. Fix by wrapping all immediates in bpf_ntohl and the new bpf_be64_to_cpu. fixup_sysctl_value() dynamically writes an immediate, and thus should be endianness-aware. Implement this by simply memcpy()ing the raw user-provided value, since testcase endianness and bpf program endianness match. Fixes: 1f5fa9ab6e2e ("selftests/bpf: Test BPF_CGROUP_SYSCTL") Fixes: 9a1027e52535 ("selftests/bpf: Test file_pos field in bpf_sysctl ctx") Fixes: 6041c67f28d8 ("selftests/bpf: Test bpf_sysctl_get_name helper") Fixes: 11ff34f74e32 ("selftests/bpf: Test sysctl_get_current_value helper") Fixes: 786047dd08de ("selftests/bpf: Test bpf_sysctl_{get,set}_new_value helpers") Fixes: 8549ddc832d6 ("selftests/bpf: Test bpf_strtol and bpf_strtoul helpers") Signed-off-by: Ilya Leoshkevich <[email protected]> Signed-off-by: Daniel Borkmann <[email protected]>
2019-09-03selftests/bpf: improve unexpected success reporting in test_syctlIlya Leoshkevich1-1/+2
When tests fail because sysctl() unexpectedly succeeds, they print an inappropriate "Unexpected failure" message and a random errno. Zero out errno before calling sysctl() and replace the message with "Unexpected success". Fixes: 1f5fa9ab6e2e ("selftests/bpf: Test BPF_CGROUP_SYSCTL") Signed-off-by: Ilya Leoshkevich <[email protected]> Signed-off-by: Daniel Borkmann <[email protected]>
2019-09-03selftests/bpf: fix "ctx:write sysctl:write read ok" on s390Ilya Leoshkevich1-1/+1
"ctx:write sysctl:write read ok" fails on s390 because it reads the first byte of an int assuming it's the least-significant one, which is not the case on big-endian arches. Since we are not testing narrow accesses here (there is e.g. "ctx:file_pos sysctl:read read ok narrow" for that), simply read the whole int. Fixes: 1f5fa9ab6e2e ("selftests/bpf: Test BPF_CGROUP_SYSCTL") Signed-off-by: Ilya Leoshkevich <[email protected]> Signed-off-by: Daniel Borkmann <[email protected]>
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