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btf_unit_test: Add test02_should_fail

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Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
This commit is contained in:
Jesper Dangaard Brouer
2022-04-22 11:29:47 +02:00
parent 7409814e44
commit 1e4e033c3a
1 changed files with 61 additions and 15 deletions
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76
AF_XDP-interaction/btf_unit_test.c
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@@ -62,21 +62,30 @@ struct xdp_hints_mark {
} xdp_hints_mark = { 0 };
struct xsk_btf_info *setup_btf_info(struct btf *btf,
const char *struct_name)
const char *struct_name,
int *errval)
{
struct xsk_btf_info *xbi = NULL;
int err;
err = xsk_btf__init_xdp_hint(btf, struct_name, &xbi);
if (err) {
fprintf(stderr, "WARN(%d): Cannot BTF locate valid struct:%s\n",
err, struct_name);
if (errval) {
/* Expect caller to handle err detection */
*errval = err;
} else {
fprintf(stderr,
"WARN(%d): Cannot BTF locate valid struct:%s\n",
err, struct_name);
}
return NULL;
}
if (verbose)
printf("Setup BTF based XDP hints for struct: %s\n",
struct_name);
if (verbose) {
int btf_id = xsk_btf__btf_type_id(xbi);
printf("Setup BTF based XDP hints for (btf_id:%d) struct: %s\n",
btf_id, struct_name);
}
return xbi;
}
@@ -86,7 +95,7 @@ int init_btf_info_via_bpf_object(struct bpf_object *bpf_obj)
struct btf *btf = bpf_object__btf(bpf_obj);
struct xsk_btf_info *xbi;
xbi = setup_btf_info(btf, "xdp_hints_rx_time");
xbi = setup_btf_info(btf, "xdp_hints_rx_time", NULL);
if (xbi) {
/* Lookup info on required member "rx_ktime" */
if (!xsk_btf__field_member("rx_ktime", xbi,
@@ -100,7 +109,7 @@ int init_btf_info_via_bpf_object(struct bpf_object *bpf_obj)
}
/* Remember to cleanup later: xsk_btf__free_xdp_hint(xbi); */
xbi = setup_btf_info(btf, "xdp_hints_mark");
xbi = setup_btf_info(btf, "xdp_hints_mark", NULL);
if (xbi) {
if (!xsk_btf__field_member("mark", xbi, &xdp_hints_mark.mark))
return -EBADSLT;
@@ -135,20 +144,57 @@ int test01_normal()
return EXIT_OK;
}
int main(int argc, char **argv)
int test02_should_fail()
{
struct bpf_object *bpf_obj;
int err;
err = test01_normal();
if (err != EXIT_OK)
return err;
struct xsk_btf_info *xbi;
struct btf *btf;
int errval = 0;
int ret = EXIT_OK;
const char *xdp_hint_name = "xdp_hints_fail001";
bpf_obj = load_bpf_object("btf_unit_test_bpf.o");
if (!bpf_obj)
return EXIT_FAIL_BPF;
bpf_object__close(bpf_obj);
btf = bpf_object__btf(bpf_obj);
xbi = setup_btf_info(btf, xdp_hint_name, &errval);
if (xbi) {
/* Unexpected success - as hints layout should be invalid */
printf(" - Unexpected success in test that should fail\n");
xsk_btf__free_xdp_hint(xbi);
ret = EXIT_FAIL_BPF;
goto out;
}
if (errval != -EOVERFLOW) {
/* Expecting failure with EOVERFLOW as btf_id not last member */
printf("Unexpect FAIL - with errno:%d\n", errval);
ret = EXIT_FAIL_BTF;
goto out;
}
if (verbose) {
printf("SUCCESS - "
"detect btf_id not last member in struct %s\n",
xdp_hint_name);
}
out:
bpf_object__close(bpf_obj);
return ret;
}
int main(int argc, char **argv)
{
int err;
err = test01_normal();
if (err)
return err;
err = test02_should_fail();
if (err)
return err;
return EXIT_OK;
}