summaryrefslogtreecommitdiff
path: root/tools/testing/selftests/bpf
AgeCommit message (Collapse)AuthorFilesLines
2021-08-25selftests: xsk: Decrease sending speedMagnus Karlsson2-1/+2
Decrease sending speed to avoid potentially overflowing some buffers in the skb case that leads to dropped packets we cannot control (and thus the tests may generate false negatives). Decrease batch size and introduce a usleep in the transmit thread to not overflow the receiver. Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20210825093722.10219-12-magnus.karlsson@gmail.com
2021-08-25selftests: xsk: Validate tx stats on tx threadMagnus Karlsson1-14/+41
Validate the tx stats on the Tx thread instead of the Rx thread. Depending on your settings, you might not be allowed to query the statistics of a socket you do not own, so better to do this on the correct thread to start with. Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20210825093722.10219-11-magnus.karlsson@gmail.com
2021-08-25selftests: xsk: Simplify packet validation in xsk testsMagnus Karlsson2-131/+65
Simplify packet validation in the xsk selftests by performing it at once for every packet. The current code performed this per batch and did this on copied packet data. Make it simpler and faster by validating it at once and on the umem packet data thus skipping the copy and the memory allocation for the temprary buffer. The optional packet dump feature is also simplified in the same manner. Memory allocation and copying is removed and the dump is performed directly on the umem data. Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20210825093722.10219-10-magnus.karlsson@gmail.com
2021-08-25selftests: xsk: Rename worker_* functions that are not thread entry pointsMagnus Karlsson1-6/+6
Rename worker_* functions that are not thread entry points to something else. This was confusing. Now only thread entry points are worker_something. Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20210825093722.10219-9-magnus.karlsson@gmail.com
2021-08-25selftests: xsk: Disassociate umem size with packets sentMagnus Karlsson2-11/+9
Disassociate the number of packets sent with the number of buffers in the umem. This so we can loop over the umem to test more things. Set the size of the umem to be a multiple of 2M. A requirement for huge pages that are needed in unaligned mode. Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20210825093722.10219-8-magnus.karlsson@gmail.com
2021-08-25selftests: xsk: Remove end-of-test packetMagnus Karlsson2-32/+12
Get rid of the end-of-test packet and just count the number of packets received and quit when the expected number as been received. Simplifies the code. Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20210825093722.10219-7-magnus.karlsson@gmail.com
2021-08-25selftests: xsk: Simplify the retry codeMagnus Karlsson2-14/+11
Simplify the retry code and make it more efficient by waiting first, instead of trying immediately which always fails due to the asynchronous nature of xsk socket close. Also decrease the wait time to significantly lower the run-time of the test suite. Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20210825093722.10219-6-magnus.karlsson@gmail.com
2021-08-25selftests: xsk: Return correct error codesMagnus Karlsson1-5/+5
Return the correct error codes so they can be printed correctly. Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20210825093722.10219-5-magnus.karlsson@gmail.com
2021-08-25selftests: xsk: Remove unused variablesMagnus Karlsson2-11/+0
Remove unused variables and typedefs. The *_npkts variables are incremented but never used. Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20210825093722.10219-4-magnus.karlsson@gmail.com
2021-08-25selftests: xsk: Remove the num_tx_packets optionMagnus Karlsson3-27/+13
Remove the number of tx packet option as this should be decided by the test itself. Also change the number of packets to be sent to 4096 speeding up the execution. Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20210825093722.10219-3-magnus.karlsson@gmail.com
2021-08-25selftests: xsk: Remove color modeMagnus Karlsson2-28/+9
Remove color mode since it does not add any value and having less code means less maintenance which is a good thing. Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20210825093722.10219-2-magnus.karlsson@gmail.com
2021-08-25bpf: selftests: Add bpf_task_pt_regs() selftestDaniel Xu2-0/+76
This test retrieves the uprobe's pt_regs in two different ways and compares the contents in an arch-agnostic way. Signed-off-by: Daniel Xu <dxu@dxuuu.xyz> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/5581eb8800f6625ec8813fe21e9dce1fbdef4937.1629772842.git.dxu@dxuuu.xyz
2021-08-25selftests/bpf: Test for get_netns_cookieXu Liu2-24/+88
Add test to use get_netns_cookie() from BPF_PROG_TYPE_SK_MSG. Signed-off-by: Xu Liu <liuxu623@gmail.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20210820071712.52852-3-liuxu623@gmail.com
2021-08-25selftests/bpf: Exit with KSFT_SKIP if no Makefile foundLi Zhijian2-1/+6
This would happend when we run the tests after install kselftests root@lkp-skl-d01 ~# /kselftests/run_kselftest.sh -t bpf:test_doc_build.sh TAP version 13 1..1 # selftests: bpf: test_doc_build.sh perl: warning: Setting locale failed. perl: warning: Please check that your locale settings: LANGUAGE = (unset), LC_ALL = (unset), LC_ADDRESS = "en_US.UTF-8", LC_NAME = "en_US.UTF-8", LC_MONETARY = "en_US.UTF-8", LC_PAPER = "en_US.UTF-8", LC_IDENTIFICATION = "en_US.UTF-8", LC_TELEPHONE = "en_US.UTF-8", LC_MEASUREMENT = "en_US.UTF-8", LC_TIME = "en_US.UTF-8", LC_NUMERIC = "en_US.UTF-8", LANG = "en_US.UTF-8" are supported and installed on your system. perl: warning: Falling back to the standard locale ("C"). # skip: bpftool files not found! # ok 1 selftests: bpf: test_doc_build.sh # SKIP Signed-off-by: Li Zhijian <lizhijian@cn.fujitsu.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20210820025549.28325-1-lizhijian@cn.fujitsu.com
2021-08-25selftests/bpf: Add missing files required by test_bpftool.sh for installingLi Zhijian2-2/+5
test_bpftool.sh relies on bpftool and test_bpftool.py. 'make install' will install bpftool to INSTALL_PATH/bpf/bpftool, and export it to PATH so that it can be used after installing. Signed-off-by: Li Zhijian <lizhijian@cn.fujitsu.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20210820015556.23276-5-lizhijian@cn.fujitsu.com
2021-08-25selftests/bpf: Add default bpftool built by selftests to PATHLi Zhijian1-0/+5
For 'make run_tests': selftests will build bpftool into tools/testing/selftests/bpf/tools/sbin/bpftool by default. ================== root@lkp-skl-d01 /opt/rootfs/v5.14-rc4# make -C tools/testing/selftests/bpf run_tests make: Entering directory '/opt/rootfs/v5.14-rc4/tools/testing/selftests/bpf' MKDIR include MKDIR libbpf MKDIR bpftool [...] GEN /opt/rootfs/v5.14-rc4/tools/testing/selftests/bpf/tools/build/bpftool/profiler.skel.h CC /opt/rootfs/v5.14-rc4/tools/testing/selftests/bpf/tools/build/bpftool/prog.o GEN /opt/rootfs/v5.14-rc4/tools/testing/selftests/bpf/tools/build/bpftool/pid_iter.skel.h CC /opt/rootfs/v5.14-rc4/tools/testing/selftests/bpf/tools/build/bpftool/pids.o LINK /opt/rootfs/v5.14-rc4/tools/testing/selftests/bpf/tools/build/bpftool/bpftool INSTALL bpftool GEN vmlinux.h [...] # test_feature_dev_json (test_bpftool.TestBpftool) ... ERROR # test_feature_kernel (test_bpftool.TestBpftool) ... ERROR # test_feature_kernel_full (test_bpftool.TestBpftool) ... ERROR # test_feature_kernel_full_vs_not_full (test_bpftool.TestBpftool) ... ERROR # test_feature_macros (test_bpftool.TestBpftool) ... Error: bug: failed to retrieve CAP_BPF status: Invalid argument # ERROR # # ====================================================================== # ERROR: test_feature_dev_json (test_bpftool.TestBpftool) # ---------------------------------------------------------------------- # Traceback (most recent call last): # File "/opt/rootfs/v5.14-rc4/tools/testing/selftests/bpf/test_bpftool.py", line 57, in wrapper # return f(*args, iface, **kwargs) # File "/opt/rootfs/v5.14-rc4/tools/testing/selftests/bpf/test_bpftool.py", line 82, in test_feature_dev_json # res = bpftool_json(["feature", "probe", "dev", iface]) # File "/opt/rootfs/v5.14-rc4/tools/testing/selftests/bpf/test_bpftool.py", line 42, in bpftool_json # res = _bpftool(args) # File "/opt/rootfs/v5.14-rc4/tools/testing/selftests/bpf/test_bpftool.py", line 34, in _bpftool # return subprocess.check_output(_args) # File "/usr/lib/python3.7/subprocess.py", line 395, in check_output # **kwargs).stdout # File "/usr/lib/python3.7/subprocess.py", line 487, in run # output=stdout, stderr=stderr) # subprocess.CalledProcessError: Command '['bpftool', '-j', 'feature', 'probe', 'dev', 'dummy0']' returned non-zero exit status 255. # ================== Signed-off-by: Li Zhijian <lizhijian@cn.fujitsu.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Song Liu <songliubraving@fb.com> Link: https://lore.kernel.org/bpf/20210820015556.23276-4-lizhijian@cn.fujitsu.com
2021-08-25selftests/bpf: Make test_doc_build.sh work from script directoryLi Zhijian1-2/+3
Previously, it fails as below: ------------- root@lkp-skl-d01 /opt/rootfs/v5.14-rc4/tools/testing/selftests/bpf# ./test_doc_build.sh ++ realpath --relative-to=/opt/rootfs/v5.14-rc4/tools/testing/selftests/bpf ./test_doc_build.sh + SCRIPT_REL_PATH=test_doc_build.sh ++ dirname test_doc_build.sh + SCRIPT_REL_DIR=. ++ realpath /opt/rootfs/v5.14-rc4/tools/testing/selftests/bpf/./../../../../ + KDIR_ROOT_DIR=/opt/rootfs/v5.14-rc4 + cd /opt/rootfs/v5.14-rc4 + for tgt in docs docs-clean + make -s -C /opt/rootfs/v5.14-rc4/. docs make: *** No rule to make target 'docs'. Stop. + for tgt in docs docs-clean + make -s -C /opt/rootfs/v5.14-rc4/. docs-clean make: *** No rule to make target 'docs-clean'. Stop. ----------- Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Li Zhijian <lizhijian@cn.fujitsu.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Song Liu <songliubraving@fb.com> Link: https://lore.kernel.org/bpf/20210820015556.23276-3-lizhijian@cn.fujitsu.com
2021-08-25selftests/bpf: Enlarge select() timeout for test_mapsLi Zhijian1-1/+1
0Day robot observed that it's easily timeout on a heavy load host. ------------------- # selftests: bpf: test_maps # Fork 1024 tasks to 'test_update_delete' # Fork 1024 tasks to 'test_update_delete' # Fork 100 tasks to 'test_hashmap' # Fork 100 tasks to 'test_hashmap_percpu' # Fork 100 tasks to 'test_hashmap_sizes' # Fork 100 tasks to 'test_hashmap_walk' # Fork 100 tasks to 'test_arraymap' # Fork 100 tasks to 'test_arraymap_percpu' # Failed sockmap unexpected timeout not ok 3 selftests: bpf: test_maps # exit=1 # selftests: bpf: test_lru_map # nr_cpus:8 ------------------- Since this test will be scheduled by 0Day to a random host that could have only a few cpus(2-8), enlarge the timeout to avoid a false NG report. In practice, i tried to pin it to only one cpu by 'taskset 0x01 ./test_maps', and knew 10S is likely enough, but i still perfer to a larger value 30. Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Li Zhijian <lizhijian@cn.fujitsu.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Song Liu <songliubraving@fb.com> Link: https://lore.kernel.org/bpf/20210820015556.23276-2-lizhijian@cn.fujitsu.com
2021-08-24selftests/bpf: Reduce flakyness in timer_mimYucong Sun1-4/+12
This patch extends wait time in timer_mim. As observed in slow CI environment, it is possible to have interrupt/preemption long enough to cause the test to fail, almost 1 failure in 5 runs. Signed-off-by: Yucong Sun <fallentree@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20210823213629.3519641-1-fallentree@fb.com
2021-08-20Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netJakub Kicinski1-0/+12
drivers/ptp/Kconfig: 55c8fca1dae1 ("ptp_pch: Restore dependency on PCI") e5f31552674e ("ethernet: fix PTP_1588_CLOCK dependencies") Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2021-08-20selftests/bpf: Add tests for {set|get} socket option from setsockopt BPFPrankur Gupta3-0/+127
Adding selftests for the newly added functionality to call bpf_setsockopt() and bpf_getsockopt() from setsockopt BPF programs. Test Details: 1. BPF Program Checks for changes in IPV6_TCLASS(SOL_IPV6) via setsockopt If the cca for the socket is not cubic do nothing If the newly set value for IPV6_TCLASS is 45 (0x2d) (as per our use-case) then change the cc from cubic to reno 2. User Space Program Creates an AF_INET6 socket and set the cca for that to be "cubic" Attach the program and set the IPV6_TCLASS to 0x2d using setsockopt Verify the cca for the socket changed to reno Signed-off-by: Prankur Gupta <prankgup@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Song Liu <songliubraving@fb.com> Link: https://lore.kernel.org/bpf/20210817224221.3257826-3-prankgup@fb.com
2021-08-19selftests/bpf: Adding delay in socketmap_listen to reduce flakynessYucong Sun1-3/+9
This patch adds a 1ms delay to reduce flakyness of the test. Signed-off-by: Yucong Sun <fallentree@fb.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20210819163609.2583758-1-fallentree@fb.com
2021-08-19selftests/bpf: Test for get_netns_cookieXu Liu2-0/+100
Add test to use get_netns_cookie() from BPF_PROG_TYPE_SOCK_OPS. Signed-off-by: Xu Liu <liuxu623@gmail.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Song Liu <songliubraving@fb.com> Link: https://lore.kernel.org/bpf/20210818105820.91894-3-liuxu623@gmail.com
2021-08-18selftests/bpf: Fix flaky send_signal testYonghong Song1-0/+16
libbpf CI has reported send_signal test is flaky although I am not able to reproduce it in my local environment. But I am able to reproduce with on-demand libbpf CI ([1]). Through code analysis, the following is possible reason. The failed subtest runs bpf program in softirq environment. Since bpf_send_signal() only sends to a fork of "test_progs" process. If the underlying current task is not "test_progs", bpf_send_signal() will not be triggered and the subtest will fail. To reduce the chances where the underlying process is not the intended one, this patch boosted scheduling priority to -20 (highest allowed by setpriority() call). And I did 10 runs with on-demand libbpf CI with this patch and I didn't observe any failures. [1] https://github.com/libbpf/libbpf/actions/workflows/ondemand.yml Signed-off-by: Yonghong Song <yhs@fb.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20210817190923.3186725-1-yhs@fb.com
2021-08-18selftests/bpf: Replace CHECK with ASSERT_* macros in send_signal.cYonghong Song1-25/+20
Replace CHECK in send_signal.c with ASSERT_* macros as ASSERT_* macros are generally preferred. There is no funcitonality change. Signed-off-by: Yonghong Song <yhs@fb.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20210817190918.3186400-1-yhs@fb.com
2021-08-17selftests/bpf: Support glob matching for test selector.Yucong Sun1-16/+62
This patch adds '-a' and '-d' arguments supporting both exact string match as well as using '*' wildcard in test/subtests selection. '-a' and '-t' can co-exists, same as '-d' and '-b', in which case they just add to the list of allowed or denied test selectors. Caveat: Same as the current substring matching mechanism, test and subtest selector applies independently, 'a*/b*' will execute all tests matching "a*", and with subtest name matching "b*", but tests matching "a*" that has no subtests will also be executed. Signed-off-by: Yucong Sun <fallentree@fb.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20210817044732.3263066-5-fallentree@fb.com
2021-08-17selftests/bpf: Also print test name in subtest status messageYucong Sun1-2/+2
This patch add test name in subtest status message line, making it possible to grep ':OK' in the output to generate a list of passed test+subtest names, which can be processed to generate argument list to be used with "-a", "-d" exact string matching. Example: #1/1 align/mov:OK .. #1/12 align/pointer variable subtraction:OK #1 align:OK Signed-off-by: Yucong Sun <fallentree@fb.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20210817044732.3263066-4-fallentree@fb.com
2021-08-17selftests/bpf: Correctly display subtest skip statusYucong Sun1-12/+13
In skip_account(), test->skip_cnt is set to 0 at the end, this makes next print statement never display SKIP status for the subtest. This patch moves the accounting logic after the print statement, fixing the issue. This patch also added SKIP status display for normal tests. Signed-off-by: Yucong Sun <fallentree@fb.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20210817044732.3263066-3-fallentree@fb.com
2021-08-17selftests/bpf: Skip loading bpf_testmod when using -l to list tests.Yucong Sun1-2/+2
When using "-l", test_progs often is executed as non-root user, load_bpf_testmod() will fail and output errors. This patch skips loading bpf testmod when "-l" is specified, making output cleaner. Signed-off-by: Yucong Sun <fallentree@fb.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20210817044732.3263066-2-fallentree@fb.com
2021-08-17selftests/bpf: Add exponential backoff to map_delete_retriable in test_mapsYucong Sun1-1/+6
Using a fixed delay of 1 microsecond has proven flaky in slow CPU environment, e.g. Github Actions CI system. This patch adds exponential backoff with a cap of 50ms to reduce the flakiness of the test. Initial delay is chosen at random in the range [0ms, 5ms). Signed-off-by: Yucong Sun <fallentree@fb.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20210817045713.3307985-1-fallentree@fb.com
2021-08-17selftests/bpf: Add exponential backoff to map_update_retriable in test_mapsYucong Sun1-1/+8
Using a fixed delay of 1 microsecond has proven flaky in slow CPU environment, e.g. Github Actions CI system. This patch adds exponential backoff with a cap of 50ms to reduce the flakiness of the test. Initial delay is chosen at random in the range [0ms, 5ms). Signed-off-by: Yucong Sun <fallentree@fb.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Song Liu <songliubraving@fb.com> Link: https://lore.kernel.org/bpf/20210816175250.296110-1-fallentree@fb.com
2021-08-17selftest/bpf: Add new tests in sockmap for unix stream to tcp.Jiang Wang1-4/+12
Add two new test cases in sockmap tests, where unix stream is redirected to tcp and vice versa. Signed-off-by: Jiang Wang <jiang.wang@bytedance.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Reviewed-by: Cong Wang <cong.wang@bytedance.com> Acked-by: John Fastabend <john.fastabend@gmail.com> Acked-by: Jakub Sitnicki <jakub@cloudflare.com> Link: https://lore.kernel.org/bpf/20210816190327.2739291-6-jiang.wang@bytedance.com
2021-08-17selftest/bpf: Change udp to inet in some function namesJiang Wang1-13/+17
This is to prepare for adding new unix stream tests. Mostly renames, also pass the socket types as an argument. Signed-off-by: Jiang Wang <jiang.wang@bytedance.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Reviewed-by: Cong Wang <cong.wang@bytedance.com> Acked-by: John Fastabend <john.fastabend@gmail.com> Acked-by: Jakub Sitnicki <jakub@cloudflare.com> Link: https://lore.kernel.org/bpf/20210816190327.2739291-5-jiang.wang@bytedance.com
2021-08-17selftest/bpf: Add tests for sockmap with unix stream type.Jiang Wang1-0/+2
Add two tests for unix stream to unix stream redirection in sockmap tests. Signed-off-by: Jiang Wang <jiang.wang@bytedance.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Reviewed-by: Cong Wang <cong.wang@bytedance.com> Acked-by: Jakub Sitnicki <jakub@cloudflare.com> Acked-by: John Fastabend <john.fastabend@gmail.com> Link: https://lore.kernel.org/bpf/20210816190327.2739291-4-jiang.wang@bytedance.com
2021-08-17selftests/bpf: Test btf__load_vmlinux_btf/btf__load_module_btf APIsHengqi Chen1-0/+34
Add test for btf__load_vmlinux_btf/btf__load_module_btf APIs. The test loads bpf_testmod module BTF and check existence of a symbol which is known to exist. Signed-off-by: Hengqi Chen <hengqi.chen@gmail.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20210815081035.205879-1-hengqi.chen@gmail.com
2021-08-17selftests/bpf: Add ref_ctr_offset selftestsAndrii Nakryiko3-11/+50
Extend attach_probe selftests to specify ref_ctr_offset for uprobe/uretprobe and validate that its value is incremented from zero. Turns out that once uprobe is attached with ref_ctr_offset, uretprobe for the same location/function *has* to use ref_ctr_offset as well, otherwise perf_event_open() fails with -EINVAL. So this test uses ref_ctr_offset for both uprobe and uretprobe, even though for the purpose of test uprobe would be enough. Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20210815070609.987780-17-andrii@kernel.org
2021-08-17selftests/bpf: Add bpf_cookie selftests for high-level APIsAndrii Nakryiko2-0/+339
Add selftest with few subtests testing proper bpf_cookie usage. Kprobe and uprobe subtests are pretty straightforward and just validate that the same BPF program attached with different bpf_cookie will be triggered with those different bpf_cookie values. Tracepoint subtest is a bit more interesting, as it is the only perf_event-based BPF hook that shares bpf_prog_array between multiple perf_events internally. This means that the same BPF program can't be attached to the same tracepoint multiple times. So we have 3 identical copies. This arrangement allows to test bpf_prog_array_copy()'s handling of bpf_prog_array list manipulation logic when programs are attached and detached. The test validates that bpf_cookie isn't mixed up and isn't lost during such list manipulations. Perf_event subtest validates that two BPF links can be created against the same perf_event (but not at the same time, only one BPF program can be attached to perf_event itself), and that for each we can specify different bpf_cookie value. Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20210815070609.987780-15-andrii@kernel.org
2021-08-17selftests/bpf: Extract uprobe-related helpers into trace_helpers.{c,h}Andrii Nakryiko3-60/+70
Extract two helpers used for working with uprobes into trace_helpers.{c,h} to be re-used between multiple uprobe-using selftests. Also rename get_offset() into more appropriate get_uprobe_offset(). Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20210815070609.987780-14-andrii@kernel.org
2021-08-17selftests/bpf: Test low-level perf BPF link APIAndrii Nakryiko2-0/+105
Add tests utilizing low-level bpf_link_create() API to create perf BPF link. Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20210815070609.987780-13-andrii@kernel.org
2021-08-15selftest/bpf: Extend the bpf_snprintf() test for "%c".Kuniyuki Iwashima2-4/+6
This patch adds various "positive" patterns for "%c" and two "negative" patterns for wide character. Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.co.jp> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20210814015718.42704-5-kuniyu@amazon.co.jp
2021-08-15selftest/bpf: Implement sample UNIX domain socket iterator program.Kuniyuki Iwashima4-0/+108
The iterator can output almost the same result compared to /proc/net/unix. The header line is aligned, and the Inode column uses "%8lu" because "%5lu" can be easily overflown. # cat /sys/fs/bpf/unix Num RefCount Protocol Flags Type St Inode Path ffff963c06689800: 00000002 00000000 00010000 0001 01 18697 private/defer ffff963c7c979c00: 00000002 00000000 00000000 0001 01 598245 @Hello@World@ # cat /proc/net/unix Num RefCount Protocol Flags Type St Inode Path ffff963c06689800: 00000002 00000000 00010000 0001 01 18697 private/defer ffff963c7c979c00: 00000002 00000000 00000000 0001 01 598245 @Hello@World@ Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.co.jp> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Yonghong Song <yhs@fb.com> Link: https://lore.kernel.org/bpf/20210814015718.42704-4-kuniyu@amazon.co.jp
2021-08-14selftests/bpf: Verify bpf_get_netns_cookie in BPF_PROG_TYPE_CGROUP_SOCKOPTStanislav Fomichev1-0/+16
Add extra calls to sockopt_sk.c. Signed-off-by: Stanislav Fomichev <sdf@google.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Martin KaFai Lau <kafai@fb.com> Link: https://lore.kernel.org/bpf/20210813230530.333779-3-sdf@google.com
2021-08-14selftests/bpf: Fix test_core_autosize on big-endian machinesIlya Leoshkevich1-5/+15
The "probed" part of test_core_autosize copies an integer using bpf_core_read() into an integer of a potentially different size. On big-endian machines a destination offset is required for this to produce a sensible result. Fixes: 888d83b961f6 ("selftests/bpf: Validate libbpf's auto-sizing of LD/ST/STX instructions") Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20210812224814.187460-1-iii@linux.ibm.com
2021-08-14libbpf: Support weak typed ksyms.Hao Luo2-0/+87
Currently weak typeless ksyms have default value zero, when they don't exist in the kernel. However, weak typed ksyms are rejected by libbpf if they can not be resolved. This means that if a bpf object contains the declaration of a nonexistent weak typed ksym, it will be rejected even if there is no program that references the symbol. Nonexistent weak typed ksyms can also default to zero just like typeless ones. This allows programs that access weak typed ksyms to be accepted by verifier, if the accesses are guarded. For example, extern const int bpf_link_fops3 __ksym __weak; /* then in BPF program */ if (&bpf_link_fops3) { /* use bpf_link_fops3 */ } If actual use of nonexistent typed ksym is not guarded properly, verifier would see that register is not PTR_TO_BTF_ID and wouldn't allow to use it for direct memory reads or passing it to BPF helpers. Signed-off-by: Hao Luo <haoluo@google.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20210812003819.2439037-1-haoluo@google.com
2021-08-14selftests/bpf: Fix running of XDP bonding testsJussi Maki1-3/+3
An "innocent" cleanup in the last version of the XDP bonding patchset moved the "test__start_subtest" calls to the test main function, but I forgot to reverse the condition, which lead to all tests being skipped. Fix it. Fixes: 6aab1c81b98a ("selftests/bpf: Add tests for XDP bonding") Signed-off-by: Jussi Maki <joamaki@gmail.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20210811123627.20223-1-joamaki@gmail.com
2021-08-13selftests, bpf: Test that dead ldx_w insns are acceptedIlya Leoshkevich1-0/+12
Prevent regressions related to zero-extension metadata handling during dead code sanitization. Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20210812151811.184086-3-iii@linux.ibm.com
2021-08-10selftests/bpf: Add tests for XDP bondingJussi Maki1-0/+520
Add a test suite to test XDP bonding implementation over a pair of veth devices. Signed-off-by: Jussi Maki <joamaki@gmail.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20210731055738.16820-8-joamaki@gmail.com
2021-08-10selftests/bpf: Fix xdp_tx.c prog section nameJussi Maki2-2/+2
The program type cannot be deduced from 'tx' which causes an invalid argument error when trying to load xdp_tx.o using the skeleton. Rename the section name to "xdp" so that libbpf can deduce the type. Signed-off-by: Jussi Maki <joamaki@gmail.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20210731055738.16820-7-joamaki@gmail.com
2021-08-06selftests/bpf: Rename reference_tracking BPF programsAndrii Nakryiko2-9/+9
BPF programs for reference_tracking selftest use "fail_" prefix to notify that they are expected to fail. This is really confusing and inconvenient when trying to grep through test_progs output to find *actually* failed tests. So rename the prefix from "fail_" to "err_". Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20210805230734.437914-1-andrii@kernel.org
2021-08-06selftests/bpf: Fix bpf-iter-tcp4 test to print correctly the dest IPJose Blanquicet1-1/+1
Currently, this test is incorrectly printing the destination port in place of the destination IP. Fixes: 2767c97765cb ("selftests/bpf: Implement sample tcp/tcp6 bpf_iter programs") Signed-off-by: Jose Blanquicet <josebl@microsoft.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Yonghong Song <yhs@fb.com> Link: https://lore.kernel.org/bpf/20210805164044.527903-1-josebl@microsoft.com
generated by cgit v1.2.3 (git 2.39.0) at 2025-09-18 02:28:47 +0300