bpf/progs/res_spin_lock.c

1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (c) 2024-2025 Meta Platforms, Inc. and affiliates. */
20 } arrmap SEC(".maps");
22 struct bpf_res_spin_lock lockA __hidden SEC(".data.A");
23 struct bpf_res_spin_lock lockB __hidden SEC(".data.B");
25 SEC("tc")
33 		return -1;  in res_spin_lock_test()
36 		return -1;  in res_spin_lock_test()
38 	r = bpf_res_spin_lock(&elem1->lock);  in res_spin_lock_test()
41 	r = bpf_res_spin_lock(&elem2->lock);  in res_spin_lock_test()
43 		bpf_res_spin_unlock(&elem2->lock);  in res_spin_lock_test()
44 		bpf_res_spin_unlock(&elem1->lock);  in res_spin_lock_test()
45 		return -1;  in res_spin_lock_test()
47 	bpf_res_spin_unlock(&elem1->lock);  in res_spin_lock_test()
48 	return r != -EDEADLK;  in res_spin_lock_test()
51 SEC("tc")
68 SEC("tc")
79 		err = -EDEADLK;  in res_spin_lock_test_BA()
84 SEC("tc")
104 		locks[i] = &e->lock;  in res_spin_lock_test_held_lock_max()
108 		int key = i - 2;  in res_spin_lock_test_held_lock_max()
116 		locks[i] = &e->lock;  in res_spin_lock_test_held_lock_max()
126 	 * time, only the timeout can save us, as AA detection won't succeed.  in res_spin_lock_test_held_lock_max()
135 	ret = ret != -ETIMEDOUT ? 2 : 0;  in res_spin_lock_test_held_lock_max()
138 	for (i = i - 1; i >= 0; i--)  in res_spin_lock_test_held_lock_max()
140 	time = bpf_ktime_get_ns() - time_beg;  in res_spin_lock_test_held_lock_max()
147 char _license[] SEC("license") = "GPL";