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Merge tag 'vfs-6.13-rc7.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
[J-linux.git] / tools / testing / selftests / bpf / prog_tests / htab_reuse.c
1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (C) 2023. Huawei Technologies Co., Ltd */
3 #define _GNU_SOURCE
4 #include <sched.h>
5 #include <stdbool.h>
6 #include <test_progs.h>
7 #include "htab_reuse.skel.h"
8
9 struct htab_op_ctx {
10         int fd;
11         int loop;
12         bool stop;
13 };
14
15 struct htab_val {
16         unsigned int lock;
17         unsigned int data;
18 };
19
20 static void *htab_lookup_fn(void *arg)
21 {
22         struct htab_op_ctx *ctx = arg;
23         int i = 0;
24
25         while (i++ < ctx->loop && !ctx->stop) {
26                 struct htab_val value;
27                 unsigned int key;
28
29                 /* Use BPF_F_LOCK to use spin-lock in map value. */
30                 key = 7;
31                 bpf_map_lookup_elem_flags(ctx->fd, &key, &value, BPF_F_LOCK);
32         }
33
34         return NULL;
35 }
36
37 static void *htab_update_fn(void *arg)
38 {
39         struct htab_op_ctx *ctx = arg;
40         int i = 0;
41
42         while (i++ < ctx->loop && !ctx->stop) {
43                 struct htab_val value;
44                 unsigned int key;
45
46                 key = 7;
47                 value.lock = 0;
48                 value.data = key;
49                 bpf_map_update_elem(ctx->fd, &key, &value, BPF_F_LOCK);
50                 bpf_map_delete_elem(ctx->fd, &key);
51
52                 key = 24;
53                 value.lock = 0;
54                 value.data = key;
55                 bpf_map_update_elem(ctx->fd, &key, &value, BPF_F_LOCK);
56                 bpf_map_delete_elem(ctx->fd, &key);
57         }
58
59         return NULL;
60 }
61
62 void test_htab_reuse(void)
63 {
64         unsigned int i, wr_nr = 1, rd_nr = 4;
65         pthread_t tids[wr_nr + rd_nr];
66         struct htab_reuse *skel;
67         struct htab_op_ctx ctx;
68         int err;
69
70         skel = htab_reuse__open_and_load();
71         if (!ASSERT_OK_PTR(skel, "htab_reuse__open_and_load"))
72                 return;
73
74         ctx.fd = bpf_map__fd(skel->maps.htab);
75         ctx.loop = 500;
76         ctx.stop = false;
77
78         memset(tids, 0, sizeof(tids));
79         for (i = 0; i < wr_nr; i++) {
80                 err = pthread_create(&tids[i], NULL, htab_update_fn, &ctx);
81                 if (!ASSERT_OK(err, "pthread_create")) {
82                         ctx.stop = true;
83                         goto reap;
84                 }
85         }
86         for (i = 0; i < rd_nr; i++) {
87                 err = pthread_create(&tids[i + wr_nr], NULL, htab_lookup_fn, &ctx);
88                 if (!ASSERT_OK(err, "pthread_create")) {
89                         ctx.stop = true;
90                         goto reap;
91                 }
92         }
93
94 reap:
95         for (i = 0; i < wr_nr + rd_nr; i++) {
96                 if (!tids[i])
97                         continue;
98                 pthread_join(tids[i], NULL);
99         }
100         htab_reuse__destroy(skel);
101 }
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