// SPDX-License-Identifier: GPL-2.0 /* Copyright (c) 2019 Facebook */ #include <test_progs.h> #include "test_ksyms.skel.h" #include <sys/stat.h> static int duration; void test_ksyms(void) { const char *btf_path = "/sys/kernel/btf/vmlinux"; struct test_ksyms *skel; struct test_ksyms__data *data; __u64 link_fops_addr, per_cpu_start_addr; struct stat st; __u64 btf_size; int err; err = kallsyms_find("bpf_link_fops", &link_fops_addr); if (CHECK(err == -EINVAL, "kallsyms_fopen", "failed to open: %d\n", errno)) return; if (CHECK(err == -ENOENT, "ksym_find", "symbol 'bpf_link_fops' not found\n")) return; err = kallsyms_find("__per_cpu_start", &per_cpu_start_addr); if (CHECK(err == -EINVAL, "kallsyms_fopen", "failed to open: %d\n", errno)) return; if (CHECK(err == -ENOENT, "ksym_find", "symbol 'per_cpu_start' not found\n")) return; if (CHECK(stat(btf_path, &st), "stat_btf", "err %d\n", errno)) return; btf_size = st.st_size; skel = test_ksyms__open_and_load(); if (CHECK(!skel, "skel_open", "failed to open and load skeleton\n")) return; err = test_ksyms__attach(skel); if (CHECK(err, "skel_attach", "skeleton attach failed: %d\n", err)) goto cleanup; /* trigger tracepoint */ usleep(1); data = skel->data; CHECK(data->out__bpf_link_fops != link_fops_addr, "bpf_link_fops", "got 0x%llx, exp 0x%llx\n", data->out__bpf_link_fops, link_fops_addr); CHECK(data->out__bpf_link_fops1 != 0, "bpf_link_fops1", "got %llu, exp %llu\n", data->out__bpf_link_fops1, (__u64)0); CHECK(data->out__btf_size != btf_size, "btf_size", "got %llu, exp %llu\n", data->out__btf_size, btf_size); CHECK(data->out__per_cpu_start != per_cpu_start_addr, "__per_cpu_start", "got %llu, exp %llu\n", data->out__per_cpu_start, per_cpu_start_addr); cleanup: test_ksyms__destroy(skel); }