// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2024 Meta Platforms, Inc. and affiliates. */
#include <test_progs.h>
#include <sys/mman.h>
#include "mmap_inner_array.skel.h"

void test_mmap_inner_array(void)
{
        const long page_size = sysconf(_SC_PAGE_SIZE);
        struct mmap_inner_array *skel;
        int inner_array_fd, err;
        void *tmp;
        __u64 *val;

        skel = mmap_inner_array__open_and_load();

        if (!ASSERT_OK_PTR(skel, "open_and_load"))
                return;

        inner_array_fd = bpf_map__fd(skel->maps.inner_array);
        tmp = mmap(NULL, page_size, PROT_READ | PROT_WRITE, MAP_SHARED, inner_array_fd, 0);
        if (!ASSERT_OK_PTR(tmp, "inner array mmap"))
                goto out;
        val = (void *)tmp;

        err = mmap_inner_array__attach(skel);
        if (!ASSERT_OK(err, "attach"))
                goto out_unmap;

        skel->bss->pid = getpid();
        usleep(1);

        /* pid is set, pid_match == true and outer_map_match == false */
        ASSERT_TRUE(skel->bss->pid_match, "pid match 1");
        ASSERT_FALSE(skel->bss->outer_map_match, "outer map match 1");
        ASSERT_FALSE(skel->bss->done, "done 1");
        ASSERT_EQ(*val, 0, "value match 1");

        err = bpf_map__update_elem(skel->maps.outer_map,
                                   &skel->bss->pid, sizeof(skel->bss->pid),
                                   &inner_array_fd, sizeof(inner_array_fd),
                                   BPF_ANY);
        if (!ASSERT_OK(err, "update elem"))
                goto out_unmap;
        usleep(1);

        /* outer map key is set, outer_map_match == true */
        ASSERT_TRUE(skel->bss->pid_match, "pid match 2");
        ASSERT_TRUE(skel->bss->outer_map_match, "outer map match 2");
        ASSERT_TRUE(skel->bss->done, "done 2");
        ASSERT_EQ(*val, skel->data->match_value, "value match 2");

out_unmap:
        munmap(tmp, page_size);
out:
        mmap_inner_array__destroy(skel);
}