63 lines
1.6 KiB
C
63 lines
1.6 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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#include "test_progs.h"
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#include "network_helpers.h"
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static __u32 duration;
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static void test_global_func_args0(struct bpf_object *obj)
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{
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int err, i, map_fd, actual_value;
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const char *map_name = "values";
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map_fd = bpf_find_map(__func__, obj, map_name);
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if (CHECK(map_fd < 0, "bpf_find_map", "cannot find BPF map %s: %s\n",
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map_name, strerror(errno)))
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return;
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struct {
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const char *descr;
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int expected_value;
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} tests[] = {
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{"passing NULL pointer", 0},
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{"returning value", 1},
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{"reading local variable", 100 },
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{"writing local variable", 101 },
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{"reading global variable", 42 },
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{"writing global variable", 43 },
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{"writing to pointer-to-pointer", 1 },
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};
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for (i = 0; i < ARRAY_SIZE(tests); ++i) {
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const int expected_value = tests[i].expected_value;
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err = bpf_map_lookup_elem(map_fd, &i, &actual_value);
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CHECK(err || actual_value != expected_value, tests[i].descr,
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"err %d result %d expected %d\n", err, actual_value, expected_value);
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}
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}
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void test_global_func_args(void)
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{
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const char *file = "./test_global_func_args.bpf.o";
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struct bpf_object *obj;
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int err, prog_fd;
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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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err = bpf_prog_test_load(file, BPF_PROG_TYPE_CGROUP_SKB, &obj, &prog_fd);
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if (CHECK(err, "load program", "error %d loading %s\n", err, file))
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return;
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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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test_global_func_args0(obj);
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bpf_object__close(obj);
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}
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