93 lines · c
1// SPDX-License-Identifier: GPL-2.02#include <test_progs.h>3#include <network_helpers.h>4 5static void *spin_lock_thread(void *arg)6{7 int err, prog_fd = *(u32 *) arg;8 LIBBPF_OPTS(bpf_test_run_opts, topts,9 .data_in = &pkt_v4,10 .data_size_in = sizeof(pkt_v4),11 .repeat = 10000,12 );13 14 err = bpf_prog_test_run_opts(prog_fd, &topts);15 ASSERT_OK(err, "test_run_opts err");16 ASSERT_OK(topts.retval, "test_run_opts retval");17 18 pthread_exit(arg);19}20 21static void *parallel_map_access(void *arg)22{23 int err, map_fd = *(u32 *) arg;24 int vars[17], i, j, rnd, key = 0;25 26 for (i = 0; i < 10000; i++) {27 err = bpf_map_lookup_elem_flags(map_fd, &key, vars, BPF_F_LOCK);28 if (CHECK_FAIL(err)) {29 printf("lookup failed\n");30 goto out;31 }32 if (CHECK_FAIL(vars[0] != 0)) {33 printf("lookup #%d var[0]=%d\n", i, vars[0]);34 goto out;35 }36 rnd = vars[1];37 for (j = 2; j < 17; j++) {38 if (vars[j] == rnd)39 continue;40 printf("lookup #%d var[1]=%d var[%d]=%d\n",41 i, rnd, j, vars[j]);42 CHECK_FAIL(vars[j] != rnd);43 goto out;44 }45 }46out:47 pthread_exit(arg);48}49 50void test_map_lock(void)51{52 const char *file = "./test_map_lock.bpf.o";53 int prog_fd, map_fd[2], vars[17] = {};54 pthread_t thread_id[6];55 struct bpf_object *obj = NULL;56 int err = 0, key = 0, i;57 void *ret;58 59 err = bpf_prog_test_load(file, BPF_PROG_TYPE_CGROUP_SKB, &obj, &prog_fd);60 if (CHECK_FAIL(err)) {61 printf("test_map_lock:bpf_prog_test_load errno %d\n", errno);62 goto close_prog;63 }64 map_fd[0] = bpf_find_map(__func__, obj, "hash_map");65 if (CHECK_FAIL(map_fd[0] < 0))66 goto close_prog;67 map_fd[1] = bpf_find_map(__func__, obj, "array_map");68 if (CHECK_FAIL(map_fd[1] < 0))69 goto close_prog;70 71 bpf_map_update_elem(map_fd[0], &key, vars, BPF_F_LOCK);72 73 for (i = 0; i < 4; i++)74 if (CHECK_FAIL(pthread_create(&thread_id[i], NULL,75 &spin_lock_thread, &prog_fd)))76 goto close_prog;77 for (i = 4; i < 6; i++)78 if (CHECK_FAIL(pthread_create(&thread_id[i], NULL,79 ¶llel_map_access,80 &map_fd[i - 4])))81 goto close_prog;82 for (i = 0; i < 4; i++)83 if (CHECK_FAIL(pthread_join(thread_id[i], &ret) ||84 ret != (void *)&prog_fd))85 goto close_prog;86 for (i = 4; i < 6; i++)87 if (CHECK_FAIL(pthread_join(thread_id[i], &ret) ||88 ret != (void *)&map_fd[i - 4]))89 goto close_prog;90close_prog:91 bpf_object__close(obj);92}93