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1// SPDX-License-Identifier: GPL-2.02/* Copyright (c) 2024 Meta Platforms, Inc. and affiliates. */3#include <test_progs.h>4#include <sys/mman.h>5#include <network_helpers.h>6#include <sys/user.h>7#ifndef PAGE_SIZE /* on some archs it comes in sys/user.h */8#include <unistd.h>9#define PAGE_SIZE getpagesize()10#endif11#include "arena_htab_asm.skel.h"12#include "arena_htab.skel.h"13 14#include "bpf_arena_htab.h"15 16static void test_arena_htab_common(struct htab *htab)17{18 int i;19 20 printf("htab %p buckets %p n_buckets %d\n", htab, htab->buckets, htab->n_buckets);21 ASSERT_OK_PTR(htab->buckets, "htab->buckets shouldn't be NULL");22 for (i = 0; htab->buckets && i < 16; i += 4) {23 /*24 * Walk htab buckets and link lists since all pointers are correct,25 * though they were written by bpf program.26 */27 int val = htab_lookup_elem(htab, i);28 29 ASSERT_EQ(i, val, "key == value");30 }31}32 33static void test_arena_htab_llvm(void)34{35 LIBBPF_OPTS(bpf_test_run_opts, opts);36 struct arena_htab *skel;37 struct htab *htab;38 size_t arena_sz;39 void *area;40 int ret;41 42 skel = arena_htab__open_and_load();43 if (!ASSERT_OK_PTR(skel, "arena_htab__open_and_load"))44 return;45 46 area = bpf_map__initial_value(skel->maps.arena, &arena_sz);47 /* fault-in a page with pgoff == 0 as sanity check */48 *(volatile int *)area = 0x55aa;49 50 /* bpf prog will allocate more pages */51 ret = bpf_prog_test_run_opts(bpf_program__fd(skel->progs.arena_htab_llvm), &opts);52 ASSERT_OK(ret, "ret");53 ASSERT_OK(opts.retval, "retval");54 if (skel->bss->skip) {55 printf("%s:SKIP:compiler doesn't support arena_cast\n", __func__);56 test__skip();57 goto out;58 }59 htab = skel->bss->htab_for_user;60 test_arena_htab_common(htab);61out:62 arena_htab__destroy(skel);63}64 65static void test_arena_htab_asm(void)66{67 LIBBPF_OPTS(bpf_test_run_opts, opts);68 struct arena_htab_asm *skel;69 struct htab *htab;70 int ret;71 72 skel = arena_htab_asm__open_and_load();73 if (!ASSERT_OK_PTR(skel, "arena_htab_asm__open_and_load"))74 return;75 76 ret = bpf_prog_test_run_opts(bpf_program__fd(skel->progs.arena_htab_asm), &opts);77 ASSERT_OK(ret, "ret");78 ASSERT_OK(opts.retval, "retval");79 htab = skel->bss->htab_for_user;80 test_arena_htab_common(htab);81 arena_htab_asm__destroy(skel);82}83 84void test_arena_htab(void)85{86 if (test__start_subtest("arena_htab_llvm"))87 test_arena_htab_llvm();88 if (test__start_subtest("arena_htab_asm"))89 test_arena_htab_asm();90}91