63 lines
1.5 KiB
C
63 lines
1.5 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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#include <test_progs.h>
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void test_global_data_init(void)
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{
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const char *file = "./test_global_data.bpf.o";
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int err = -ENOMEM, map_fd, zero = 0;
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__u8 *buff = NULL, *newval = NULL;
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struct bpf_object *obj;
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struct bpf_map *map;
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__u32 duration = 0;
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size_t sz;
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obj = bpf_object__open_file(file, NULL);
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err = libbpf_get_error(obj);
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if (CHECK_FAIL(err))
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return;
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map = bpf_object__find_map_by_name(obj, ".rodata");
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if (CHECK_FAIL(!map || !bpf_map__is_internal(map)))
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goto out;
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sz = bpf_map__value_size(map);
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newval = malloc(sz);
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if (CHECK_FAIL(!newval))
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goto out;
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memset(newval, 0, sz);
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/* wrong size, should fail */
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err = bpf_map__set_initial_value(map, newval, sz - 1);
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if (CHECK(!err, "reject set initial value wrong size", "err %d\n", err))
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goto out;
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err = bpf_map__set_initial_value(map, newval, sz);
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if (CHECK(err, "set initial value", "err %d\n", err))
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goto out;
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err = bpf_object__load(obj);
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if (CHECK_FAIL(err))
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goto out;
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map_fd = bpf_map__fd(map);
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if (CHECK_FAIL(map_fd < 0))
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goto out;
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buff = malloc(sz);
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if (buff)
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err = bpf_map_lookup_elem(map_fd, &zero, buff);
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if (CHECK(!buff || err || memcmp(buff, newval, sz),
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"compare .rodata map data override",
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"err %d errno %d\n", err, errno))
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goto out;
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memset(newval, 1, sz);
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/* object loaded - should fail */
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err = bpf_map__set_initial_value(map, newval, sz);
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CHECK(!err, "reject set initial value after load", "err %d\n", err);
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out:
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free(buff);
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free(newval);
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bpf_object__close(obj);
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}
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