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// 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;
static __u64 kallsyms_find(const char *sym)
{
char type, name[500];
__u64 addr, res = 0;
FILE *f;
f = fopen("/proc/kallsyms", "r");
if (CHECK(!f, "kallsyms_fopen", "failed to open: %d\n", errno))
return 0;
while (fscanf(f, "%llx %c %499s%*[^\n]\n", &addr, &type, name) > 0) {
if (strcmp(name, sym) == 0) {
res = addr;
goto out;
}
}
CHECK(false, "not_found", "symbol %s not found\n", sym);
out:
fclose(f);
return res;
}
void test_ksyms(void)
{
__u64 link_fops_addr = kallsyms_find("bpf_link_fops");
const char *btf_path = "/sys/kernel/btf/vmlinux";
struct test_ksyms *skel;
struct test_ksyms__data *data;
struct stat st;
__u64 btf_size;
int err;
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 != 0, "__per_cpu_start",
"got %llu, exp %llu\n", data->out__per_cpu_start, (__u64)0);
cleanup:
test_ksyms__destroy(skel);
}
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