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selftests: bpf: Make reuseport test output more legible 

Include the name of the mismatching result in human readable format
when reporting an error. The new output looks like the following:

  unexpected result
   result: [1, 0, 0, 0, 0, 0]
  expected: [0, 0, 0, 0, 0, 0]
  mismatch on DROP_ERR_INNER_MAP (bpf_prog_linum:153)
  check_results:FAIL:382

Signed-off-by: Lorenz Bauer <lmb@cloudflare.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: Jakub Sitnicki <jakub@cloudflare.com>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Link: https://lore.kernel.org/bpf/20200124112754.19664-4-lmb@cloudflare.com
This commit is contained in:
Lorenz Bauer 2020-01-24 11:27:53 +00:00 committed by Daniel Borkmann
parent 8bec4f665e
commit 603fba9dfd
1 changed files with 24 additions and 4 deletions
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28
tools/testing/selftests/bpf/prog_tests/select_reuseport.c
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@ -316,6 +316,26 @@ static void check_data(int type, sa_family_t family, const struct cmd *cmd,
expected.len, result.len, get_linum());
}
static const char *result_to_str(enum result res)
{
switch (res) {
case DROP_ERR_INNER_MAP:
return "DROP_ERR_INNER_MAP";
case DROP_ERR_SKB_DATA:
return "DROP_ERR_SKB_DATA";
case DROP_ERR_SK_SELECT_REUSEPORT:
return "DROP_ERR_SK_SELECT_REUSEPORT";
case DROP_MISC:
return "DROP_MISC";
case PASS:
return "PASS";
case PASS_ERR_SK_SELECT_REUSEPORT:
return "PASS_ERR_SK_SELECT_REUSEPORT";
default:
return "UNKNOWN";
}
}
static void check_results(void)
{
__u32 results[NR_RESULTS];
@ -351,10 +371,10 @@ static void check_results(void)
printf(", %u", expected_results[i]);
printf("]\n");
RET_IF(expected_results[broken] != results[broken],
"unexpected result",
"expected_results[%u] != results[%u] bpf_prog_linum:%ld\n",
broken, broken, get_linum());
printf("mismatch on %s (bpf_prog_linum:%ld)\n", result_to_str(broken),
get_linum());
CHECK_FAIL(true);
}
static int send_data(int type, sa_family_t family, void *data, size_t len,