mirror of https://github.com/torvalds/linux.git
99 lines
2.3 KiB
C
99 lines
2.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright (c) 2024-2025 Meta Platforms, Inc. and affiliates. */
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#include <test_progs.h>
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#include <network_helpers.h>
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#include <sys/sysinfo.h>
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#include "res_spin_lock.skel.h"
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#include "res_spin_lock_fail.skel.h"
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void test_res_spin_lock_failure(void)
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{
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RUN_TESTS(res_spin_lock_fail);
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}
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static volatile int skip;
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static void *spin_lock_thread(void *arg)
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{
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int err, prog_fd = *(u32 *) arg;
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LIBBPF_OPTS(bpf_test_run_opts, topts,
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.data_in = &pkt_v4,
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.data_size_in = sizeof(pkt_v4),
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.repeat = 10000,
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);
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while (!READ_ONCE(skip)) {
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err = bpf_prog_test_run_opts(prog_fd, &topts);
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ASSERT_OK(err, "test_run");
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ASSERT_OK(topts.retval, "test_run retval");
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}
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pthread_exit(arg);
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}
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void test_res_spin_lock_success(void)
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{
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LIBBPF_OPTS(bpf_test_run_opts, topts,
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.data_in = &pkt_v4,
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.data_size_in = sizeof(pkt_v4),
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.repeat = 1,
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);
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struct res_spin_lock *skel;
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pthread_t thread_id[16];
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int prog_fd, i, err;
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void *ret;
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if (get_nprocs() < 2) {
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test__skip();
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return;
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}
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skel = res_spin_lock__open_and_load();
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if (!ASSERT_OK_PTR(skel, "res_spin_lock__open_and_load"))
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return;
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/* AA deadlock */
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prog_fd = bpf_program__fd(skel->progs.res_spin_lock_test);
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err = bpf_prog_test_run_opts(prog_fd, &topts);
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ASSERT_OK(err, "error");
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ASSERT_OK(topts.retval, "retval");
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prog_fd = bpf_program__fd(skel->progs.res_spin_lock_test_held_lock_max);
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err = bpf_prog_test_run_opts(prog_fd, &topts);
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ASSERT_OK(err, "error");
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ASSERT_OK(topts.retval, "retval");
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/* Multi-threaded ABBA deadlock. */
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prog_fd = bpf_program__fd(skel->progs.res_spin_lock_test_AB);
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for (i = 0; i < 16; i++) {
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int err;
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err = pthread_create(&thread_id[i], NULL, &spin_lock_thread, &prog_fd);
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if (!ASSERT_OK(err, "pthread_create"))
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goto end;
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}
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topts.retval = 0;
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topts.repeat = 1000;
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int fd = bpf_program__fd(skel->progs.res_spin_lock_test_BA);
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while (!topts.retval && !err && !READ_ONCE(skel->bss->err)) {
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err = bpf_prog_test_run_opts(fd, &topts);
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}
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WRITE_ONCE(skip, true);
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for (i = 0; i < 16; i++) {
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if (!ASSERT_OK(pthread_join(thread_id[i], &ret), "pthread_join"))
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goto end;
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if (!ASSERT_EQ(ret, &prog_fd, "ret == prog_fd"))
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goto end;
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}
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ASSERT_EQ(READ_ONCE(skel->bss->err), -EDEADLK, "timeout err");
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ASSERT_OK(err, "err");
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ASSERT_EQ(topts.retval, -EDEADLK, "timeout");
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end:
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res_spin_lock__destroy(skel);
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return;
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}
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