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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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selftests/bpf: test for bpf_get_stackid() from raw tracepoints
similar to traditional traceopint test add bpf_get_stackid() test from raw tracepoints and reduce verbosity of existing stackmap test Signed-off-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
This commit is contained in:
parent
4662a4e538
commit
3bbe086988
1 changed files with 70 additions and 21 deletions
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@ -877,7 +877,7 @@ static void test_stacktrace_map()
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err = bpf_prog_load(file, BPF_PROG_TYPE_TRACEPOINT, &obj, &prog_fd);
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err = bpf_prog_load(file, BPF_PROG_TYPE_TRACEPOINT, &obj, &prog_fd);
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if (CHECK(err, "prog_load", "err %d errno %d\n", err, errno))
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if (CHECK(err, "prog_load", "err %d errno %d\n", err, errno))
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goto out;
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return;
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/* Get the ID for the sched/sched_switch tracepoint */
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/* Get the ID for the sched/sched_switch tracepoint */
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snprintf(buf, sizeof(buf),
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snprintf(buf, sizeof(buf),
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@ -888,8 +888,7 @@ static void test_stacktrace_map()
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bytes = read(efd, buf, sizeof(buf));
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bytes = read(efd, buf, sizeof(buf));
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close(efd);
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close(efd);
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if (CHECK(bytes <= 0 || bytes >= sizeof(buf),
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if (bytes <= 0 || bytes >= sizeof(buf))
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"read", "bytes %d errno %d\n", bytes, errno))
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goto close_prog;
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goto close_prog;
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/* Open the perf event and attach bpf progrram */
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/* Open the perf event and attach bpf progrram */
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@ -906,29 +905,24 @@ static void test_stacktrace_map()
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goto close_prog;
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goto close_prog;
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err = ioctl(pmu_fd, PERF_EVENT_IOC_ENABLE, 0);
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err = ioctl(pmu_fd, PERF_EVENT_IOC_ENABLE, 0);
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if (CHECK(err, "perf_event_ioc_enable", "err %d errno %d\n",
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if (err)
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err, errno))
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goto disable_pmu;
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goto close_pmu;
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err = ioctl(pmu_fd, PERF_EVENT_IOC_SET_BPF, prog_fd);
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err = ioctl(pmu_fd, PERF_EVENT_IOC_SET_BPF, prog_fd);
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if (CHECK(err, "perf_event_ioc_set_bpf", "err %d errno %d\n",
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if (err)
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err, errno))
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goto disable_pmu;
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goto disable_pmu;
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/* find map fds */
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/* find map fds */
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control_map_fd = bpf_find_map(__func__, obj, "control_map");
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control_map_fd = bpf_find_map(__func__, obj, "control_map");
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if (CHECK(control_map_fd < 0, "bpf_find_map control_map",
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if (control_map_fd < 0)
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"err %d errno %d\n", err, errno))
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goto disable_pmu;
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goto disable_pmu;
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stackid_hmap_fd = bpf_find_map(__func__, obj, "stackid_hmap");
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stackid_hmap_fd = bpf_find_map(__func__, obj, "stackid_hmap");
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if (CHECK(stackid_hmap_fd < 0, "bpf_find_map stackid_hmap",
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if (stackid_hmap_fd < 0)
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"err %d errno %d\n", err, errno))
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goto disable_pmu;
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goto disable_pmu;
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stackmap_fd = bpf_find_map(__func__, obj, "stackmap");
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stackmap_fd = bpf_find_map(__func__, obj, "stackmap");
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if (CHECK(stackmap_fd < 0, "bpf_find_map stackmap", "err %d errno %d\n",
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if (stackmap_fd < 0)
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err, errno))
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goto disable_pmu;
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goto disable_pmu;
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/* give some time for bpf program run */
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/* give some time for bpf program run */
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@ -945,24 +939,78 @@ static void test_stacktrace_map()
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err = compare_map_keys(stackid_hmap_fd, stackmap_fd);
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err = compare_map_keys(stackid_hmap_fd, stackmap_fd);
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if (CHECK(err, "compare_map_keys stackid_hmap vs. stackmap",
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if (CHECK(err, "compare_map_keys stackid_hmap vs. stackmap",
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"err %d errno %d\n", err, errno))
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"err %d errno %d\n", err, errno))
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goto disable_pmu;
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goto disable_pmu_noerr;
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err = compare_map_keys(stackmap_fd, stackid_hmap_fd);
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err = compare_map_keys(stackmap_fd, stackid_hmap_fd);
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if (CHECK(err, "compare_map_keys stackmap vs. stackid_hmap",
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if (CHECK(err, "compare_map_keys stackmap vs. stackid_hmap",
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"err %d errno %d\n", err, errno))
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"err %d errno %d\n", err, errno))
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; /* fall through */
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goto disable_pmu_noerr;
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goto disable_pmu_noerr;
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disable_pmu:
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disable_pmu:
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error_cnt++;
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disable_pmu_noerr:
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ioctl(pmu_fd, PERF_EVENT_IOC_DISABLE);
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ioctl(pmu_fd, PERF_EVENT_IOC_DISABLE);
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close_pmu:
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close(pmu_fd);
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close(pmu_fd);
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close_prog:
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close_prog:
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bpf_object__close(obj);
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bpf_object__close(obj);
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}
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out:
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static void test_stacktrace_map_raw_tp()
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return;
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{
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int control_map_fd, stackid_hmap_fd, stackmap_fd;
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const char *file = "./test_stacktrace_map.o";
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int efd, err, prog_fd;
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__u32 key, val, duration = 0;
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struct bpf_object *obj;
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err = bpf_prog_load(file, BPF_PROG_TYPE_RAW_TRACEPOINT, &obj, &prog_fd);
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if (CHECK(err, "prog_load raw tp", "err %d errno %d\n", err, errno))
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return;
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efd = bpf_raw_tracepoint_open("sched_switch", prog_fd);
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if (CHECK(efd < 0, "raw_tp_open", "err %d errno %d\n", efd, errno))
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goto close_prog;
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/* find map fds */
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control_map_fd = bpf_find_map(__func__, obj, "control_map");
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if (control_map_fd < 0)
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goto close_prog;
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stackid_hmap_fd = bpf_find_map(__func__, obj, "stackid_hmap");
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if (stackid_hmap_fd < 0)
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goto close_prog;
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stackmap_fd = bpf_find_map(__func__, obj, "stackmap");
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if (stackmap_fd < 0)
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goto close_prog;
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/* give some time for bpf program run */
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sleep(1);
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/* disable stack trace collection */
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key = 0;
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val = 1;
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bpf_map_update_elem(control_map_fd, &key, &val, 0);
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/* for every element in stackid_hmap, we can find a corresponding one
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* in stackmap, and vise versa.
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*/
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err = compare_map_keys(stackid_hmap_fd, stackmap_fd);
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if (CHECK(err, "compare_map_keys stackid_hmap vs. stackmap",
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"err %d errno %d\n", err, errno))
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goto close_prog;
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err = compare_map_keys(stackmap_fd, stackid_hmap_fd);
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if (CHECK(err, "compare_map_keys stackmap vs. stackid_hmap",
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"err %d errno %d\n", err, errno))
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goto close_prog;
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goto close_prog_noerr;
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close_prog:
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error_cnt++;
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close_prog_noerr:
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bpf_object__close(obj);
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}
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}
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static int extract_build_id(char *build_id, size_t size)
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static int extract_build_id(char *build_id, size_t size)
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@ -1138,6 +1186,7 @@ int main(void)
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test_tp_attach_query();
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test_tp_attach_query();
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test_stacktrace_map();
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test_stacktrace_map();
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test_stacktrace_build_id();
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test_stacktrace_build_id();
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test_stacktrace_map_raw_tp();
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printf("Summary: %d PASSED, %d FAILED\n", pass_cnt, error_cnt);
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printf("Summary: %d PASSED, %d FAILED\n", pass_cnt, error_cnt);
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return error_cnt ? EXIT_FAILURE : EXIT_SUCCESS;
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return error_cnt ? EXIT_FAILURE : EXIT_SUCCESS;
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