// 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 *file = "test_rdonly_maps.bpf.o";
        struct rdonly_map_subtest subtests[] = {
                { "skip loop", "skip_loop", 0, 0 },
                { "part loop", "part_loop", 3, 2 + 3 + 4 },
                { "full loop", "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 (!ASSERT_OK_PTR(obj, "obj_open"))
                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, ".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_name(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 (!ASSERT_OK_PTR(link, "attach_prog"))
                        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);
}