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// SPDX-License-Identifier: GPL-2.0
#include <test_progs.h>
struct bss {
unsigned did_run;
unsigned iters;
unsigned sum;
};
struct rdonly_map_subtest {
const char *subtest_name;
const char *prog_name;
unsigned exp_iters;
unsigned exp_sum;
};
void test_rdonly_maps(void)
{
const char *prog_name_skip_loop = "raw_tracepoint/sys_enter:skip_loop";
const char *prog_name_part_loop = "raw_tracepoint/sys_enter:part_loop";
const char *prog_name_full_loop = "raw_tracepoint/sys_enter:full_loop";
const char *file = "test_rdonly_maps.o";
struct rdonly_map_subtest subtests[] = {
{ "skip loop", prog_name_skip_loop, 0, 0 },
{ "part loop", prog_name_part_loop, 3, 2 + 3 + 4 },
{ "full loop", prog_name_full_loop, 4, 2 + 3 + 4 + 5 },
};
int i, err, zero = 0, duration = 0;
struct bpf_link *link = NULL;
struct bpf_program *prog;
struct bpf_map *bss_map;
struct bpf_object *obj;
struct bss bss;
obj = bpf_object__open_file(file, NULL);
if (CHECK(IS_ERR(obj), "obj_open", "err %ld\n", PTR_ERR(obj)))
return;
err = bpf_object__load(obj);
if (CHECK(err, "obj_load", "err %d errno %d\n", err, errno))
goto cleanup;
bss_map = bpf_object__find_map_by_name(obj, "test_rdo.bss");
if (CHECK(!bss_map, "find_bss_map", "failed\n"))
goto cleanup;
for (i = 0; i < ARRAY_SIZE(subtests); i++) {
const struct rdonly_map_subtest *t = &subtests[i];
if (!test__start_subtest(t->subtest_name))
continue;
prog = bpf_object__find_program_by_title(obj, t->prog_name);
if (CHECK(!prog, "find_prog", "prog '%s' not found\n",
t->prog_name))
goto cleanup;
memset(&bss, 0, sizeof(bss));
err = bpf_map_update_elem(bpf_map__fd(bss_map), &zero, &bss, 0);
if (CHECK(err, "set_bss", "failed to set bss data: %d\n", err))
goto cleanup;
link = bpf_program__attach_raw_tracepoint(prog, "sys_enter");
if (CHECK(IS_ERR(link), "attach_prog", "prog '%s', err %ld\n",
t->prog_name, PTR_ERR(link))) {
link = NULL;
goto cleanup;
}
/* trigger probe */
usleep(1);
bpf_link__destroy(link);
link = NULL;
err = bpf_map_lookup_elem(bpf_map__fd(bss_map), &zero, &bss);
if (CHECK(err, "get_bss", "failed to get bss data: %d\n", err))
goto cleanup;
if (CHECK(bss.did_run == 0, "check_run",
"prog '%s' didn't run?\n", t->prog_name))
goto cleanup;
if (CHECK(bss.iters != t->exp_iters, "check_iters",
"prog '%s' iters: %d, expected: %d\n",
t->prog_name, bss.iters, t->exp_iters))
goto cleanup;
if (CHECK(bss.sum != t->exp_sum, "check_sum",
"prog '%s' sum: %d, expected: %d\n",
t->prog_name, bss.sum, t->exp_sum))
goto cleanup;
}
cleanup:
bpf_link__destroy(link);
bpf_object__close(obj);
}
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