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selftests/bpf: Add test cases to test narrower ctx field loads

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Add test cases in test_verifier and test_progs.
Negative tests are added in test_verifier as well.
The test in test_progs will compare the value of narrower ctx field
load result vs. the masked value of normal full-field load result,
and will fail if they are not the same.

Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Yonghong Song <yhs@fb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Yonghong Song
2017-06-13 15:52:14 -07:00
committed by David S. Miller
parent 31fd85816d
commit 18f3d6be6b
4 changed files with 234 additions and 1 deletions
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21
tools/testing/selftests/bpf/test_progs.c
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@@ -484,6 +484,26 @@ done:
bpf_object__close(objs[i]);
}
static void test_pkt_md_access(void)
{
const char *file = "./test_pkt_md_access.o";
struct bpf_object *obj;
__u32 duration, retval;
int err, prog_fd;
err = bpf_prog_load(file, BPF_PROG_TYPE_SCHED_CLS, &obj, &prog_fd);
if (err)
return;
err = bpf_prog_test_run(prog_fd, 10, &pkt_v4, sizeof(pkt_v4),
NULL, NULL, &retval, &duration);
CHECK(err || retval, "",
"err %d errno %d retval %d duration %d\n",
err, errno, retval, duration);
bpf_object__close(obj);
}
int main(void)
{
struct rlimit rinf = { RLIM_INFINITY, RLIM_INFINITY };
@@ -495,6 +515,7 @@ int main(void)
test_l4lb();
test_tcp_estats();
test_bpf_obj_id();
test_pkt_md_access();
printf("Summary: %d PASSED, %d FAILED\n", pass_cnt, error_cnt);
return error_cnt ? EXIT_FAILURE : EXIT_SUCCESS;