1 // SPDX-License-Identifier: GPL-2.0
2 // Copyright (c) 2019 Facebook
4 #include <linux/version.h>
5 #include <bpf/bpf_helpers.h>
10 struct bpf_spin_lock lock;
15 __uint(type, BPF_MAP_TYPE_HASH);
16 __uint(max_entries, 1);
18 __type(value, struct hmap_elem);
19 } hash_map SEC(".maps");
22 struct bpf_spin_lock lock;
27 __uint(type, BPF_MAP_TYPE_ARRAY);
28 __uint(max_entries, 1);
30 __type(value, struct array_elem);
31 } array_map SEC(".maps");
34 int bpf_map_lock_test(struct __sk_buff *skb)
36 struct hmap_elem *val;
37 int rnd = bpf_get_prandom_u32();
38 int key = 0, err = 1, i;
41 val = bpf_map_lookup_elem(&hash_map, &key);
44 /* spin_lock in hash map */
45 bpf_spin_lock(&val->lock);
46 for (i = 0; i < VAR_NUM; i++)
48 bpf_spin_unlock(&val->lock);
50 /* spin_lock in array */
51 q = bpf_map_lookup_elem(&array_map, &key);
54 bpf_spin_lock(&q->lock);
55 for (i = 0; i < VAR_NUM; i++)
57 bpf_spin_unlock(&q->lock);
62 char _license[] SEC("license") = "GPL";