linux-dev/tools/testing/selftests/bpf/map_tests, branch master

selftests/bpf: Free the allocated resources after test case succeeds

2022-09-22T23:41:27Z

Free the created fd or allocated bpf_object after test case succeeds, else there will be resource leaks. Spotted by using address sanitizer and checking the content of /proc/$pid/fd directory. Signed-off-by: Hou Tao Link: https://lore.kernel.org/r/20220921070035.2016413-3-houtao@huaweicloud.com Signed-off-by: Martin KaFai Lau

selftests/bpf: Destroy the skeleton when CONFIG_PREEMPT is off

2022-09-22T23:41:27Z

Destroy the created skeleton when CONFIG_PREEMPT is off, else will be resource leak. Fixes: 73b97bc78b32 ("selftests/bpf: Test concurrent updates on bpf_task_storage_busy") Signed-off-by: Hou Tao Link: https://lore.kernel.org/r/20220921070035.2016413-2-houtao@huaweicloud.com Signed-off-by: Martin KaFai Lau

selftests/bpf: Add test result messages for test_task_storage_map_stress_lookup

2022-09-19T18:17:38Z

Add test result message when test_task_storage_map_stress_lookup() succeeds or is skipped. The test case can be skipped due to the choose of preemption model in kernel config, so export skips in test_maps.c and increase it when needed. The following is the output of test_maps when the test case succeeds or is skipped: test_task_storage_map_stress_lookup:PASS test_maps: OK, 0 SKIPPED test_task_storage_map_stress_lookup SKIP (no CONFIG_PREEMPT) test_maps: OK, 1 SKIPPED Fixes: 73b97bc78b32 ("selftests/bpf: Test concurrent updates on bpf_task_storage_busy") Signed-off-by: Hou Tao Link: https://lore.kernel.org/r/20220919035714.2195144-1-houtao@huaweicloud.com Signed-off-by: Martin KaFai Lau

selftests/bpf: Test concurrent updates on bpf_task_storage_busy

2022-09-01T19:16:21Z

Under full preemptible kernel, task local storage lookup operations on the same CPU may update per-cpu bpf_task_storage_busy concurrently. If the update of bpf_task_storage_busy is not preemption safe, the final value of bpf_task_storage_busy may become not-zero forever and bpf_task_storage_trylock() will always fail. So add a test case to ensure the update of bpf_task_storage_busy is preemption safe. Will skip the test case when CONFIG_PREEMPT is disabled, and it can only reproduce the problem probabilistically. By increasing TASK_STORAGE_MAP_NR_LOOP and running it under ARM64 VM with 4-cpus, it takes about four rounds to reproduce: > test_maps is modified to only run test_task_storage_map_stress_lookup() $ export TASK_STORAGE_MAP_NR_THREAD=256 $ export TASK_STORAGE_MAP_NR_LOOP=81920 $ export TASK_STORAGE_MAP_PIN_CPU=1 $ time ./test_maps test_task_storage_map_stress_lookup(135):FAIL:bad bpf_task_storage_busy got -2 real 0m24.743s user 0m6.772s sys 0m17.966s Signed-off-by: Hou Tao Acked-by: Alexei Starovoitov Link: https://lore.kernel.org/r/20220901061938.3789460-5-houtao@huaweicloud.com Signed-off-by: Martin KaFai Lau

selftests/bpf: Handle batch operations for map-in-map bpf-maps

2022-05-10T17:34:57Z

This patch adds up test cases that handles 4 combinations: a) outer map: BPF_MAP_TYPE_ARRAY_OF_MAPS inner maps: BPF_MAP_TYPE_ARRAY and BPF_MAP_TYPE_HASH b) outer map: BPF_MAP_TYPE_HASH_OF_MAPS inner maps: BPF_MAP_TYPE_ARRAY and BPF_MAP_TYPE_HASH Signed-off-by: Takshak Chahande Signed-off-by: Alexei Starovoitov Acked-by: Yonghong Song Link: https://lore.kernel.org/bpf/20220510082221.2390540-2-ctakshak@fb.com

selftests/bpf: Replace all uses of bpf_load_btf() with bpf_btf_load()

2021-12-10T23:29:18Z

Switch all selftests uses of to-be-deprecated bpf_load_btf() with equivalent bpf_btf_load() calls. Signed-off-by: Andrii Nakryiko Signed-off-by: Alexei Starovoitov Link: https://lore.kernel.org/bpf/20211209193840.1248570-10-andrii@kernel.org

selftests/bpf: Migrate selftests to bpf_map_create()

2021-11-25T22:37:38Z

Conversion is straightforward for most cases. In few cases tests are using mutable map_flags and attribute structs, but bpf_map_create_opts can be used in the similar fashion, so there were no problems. Just lots of repetitive conversions. Signed-off-by: Andrii Nakryiko Signed-off-by: Daniel Borkmann Link: https://lore.kernel.org/bpf/20211124193233.3115996-5-andrii@kernel.org

bpf, selftests: Update array map tests for per-cpu batched ops

2021-04-27T23:18:12Z

Follows the same logic as the hashtable tests. Signed-off-by: Pedro Tammela Signed-off-by: Daniel Borkmann Link: https://lore.kernel.org/bpf/20210424214510.806627-3-pctammela@mojatatu.com

bpf: selftests: Add tests for batched ops in LPM trie maps

2021-03-26T01:51:08Z

Uses the already existing infrastructure for testing batched ops. The testing code is essentially the same, with minor tweaks for this use case. Suggested-by: Jamal Hadi Salim Signed-off-by: Pedro Tammela Signed-off-by: Alexei Starovoitov Link: https://lore.kernel.org/bpf/20210323025058.315763-3-pctammela@gmail.com

bpf: selftests: Remove unused 'nospace_err' in tests for batched ops in array maps

2021-03-16T05:19:33Z

This seems to be a reminiscent from the hashmap tests. Signed-off-by: Pedro Tammela Signed-off-by: Andrii Nakryiko Acked-by: Yonghong Song Link: https://lore.kernel.org/bpf/20210315132954.603108-1-pctammela@gmail.com