1 // SPDX-License-Identifier: GPL-2.0
2 /* 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 #endif
11 #include "arena_htab_asm.skel.h"
12 #include "arena_htab.skel.h"
13
14 #include "bpf_arena_htab.h"
15
16 static 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
33 static 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);
61 out:
62 arena_htab__destroy(skel);
63 }
64
65 static 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
84 void 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
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