76 lines
1.9 KiB
C
76 lines
1.9 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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#include <test_progs.h>
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static void *parallel_map_access(void *arg)
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{
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int err, map_fd = *(u32 *) arg;
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int vars[17], i, j, rnd, key = 0;
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for (i = 0; i < 10000; i++) {
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err = bpf_map_lookup_elem_flags(map_fd, &key, vars, BPF_F_LOCK);
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if (CHECK_FAIL(err)) {
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printf("lookup failed\n");
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goto out;
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}
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if (CHECK_FAIL(vars[0] != 0)) {
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printf("lookup #%d var[0]=%d\n", i, vars[0]);
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goto out;
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}
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rnd = vars[1];
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for (j = 2; j < 17; j++) {
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if (vars[j] == rnd)
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continue;
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printf("lookup #%d var[1]=%d var[%d]=%d\n",
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i, rnd, j, vars[j]);
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CHECK_FAIL(vars[j] != rnd);
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goto out;
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}
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}
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out:
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pthread_exit(arg);
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}
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void test_map_lock(void)
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{
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const char *file = "./test_map_lock.o";
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int prog_fd, map_fd[2], vars[17] = {};
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pthread_t thread_id[6];
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struct bpf_object *obj = NULL;
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int err = 0, key = 0, i;
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void *ret;
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err = bpf_prog_load(file, BPF_PROG_TYPE_CGROUP_SKB, &obj, &prog_fd);
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if (CHECK_FAIL(err)) {
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printf("test_map_lock:bpf_prog_load errno %d\n", errno);
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goto close_prog;
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}
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map_fd[0] = bpf_find_map(__func__, obj, "hash_map");
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if (CHECK_FAIL(map_fd[0] < 0))
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goto close_prog;
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map_fd[1] = bpf_find_map(__func__, obj, "array_map");
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if (CHECK_FAIL(map_fd[1] < 0))
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goto close_prog;
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bpf_map_update_elem(map_fd[0], &key, vars, BPF_F_LOCK);
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for (i = 0; i < 4; i++)
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if (CHECK_FAIL(pthread_create(&thread_id[i], NULL,
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&spin_lock_thread, &prog_fd)))
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goto close_prog;
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for (i = 4; i < 6; i++)
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if (CHECK_FAIL(pthread_create(&thread_id[i], NULL,
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¶llel_map_access,
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&map_fd[i - 4])))
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goto close_prog;
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for (i = 0; i < 4; i++)
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if (CHECK_FAIL(pthread_join(thread_id[i], &ret) ||
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ret != (void *)&prog_fd))
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goto close_prog;
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for (i = 4; i < 6; i++)
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if (CHECK_FAIL(pthread_join(thread_id[i], &ret) ||
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ret != (void *)&map_fd[i - 4]))
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goto close_prog;
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close_prog:
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bpf_object__close(obj);
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}
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