On Fri, Feb 25, 2022 at 12:13 PM -08, Martin KaFai Lau wrote:
> On Fri, Feb 25, 2022 at 07:41:30PM +0100, Jakub Sitnicki wrote:
>> The helper macro that records an error in BPF programs that exercise sock
>> fields access has been indavertedly broken by adaptation work that happened
>> in commit b18c1f0aa477 ("bpf: selftest: Adapt sock_fields test to use skel
>> and global variables").
>>
>> BPF_NOEXIST flag cannot be used to update BPF_MAP_TYPE_ARRAY. The operation
>> always fails with -EEXIST, which in turn means the error never gets
>> recorded, and the checks for errors always pass.
>>
>> Revert the change in update flags.
>>
>> Fixes: b18c1f0aa477 ("bpf: selftest: Adapt sock_fields test to use skel and global variables")
>> Signed-off-by: Jakub Sitnicki <jakub@xxxxxxxxxxxxxx>
>> ---
>> tools/testing/selftests/bpf/progs/test_sock_fields.c | 2 +-
>> 1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/tools/testing/selftests/bpf/progs/test_sock_fields.c b/tools/testing/selftests/bpf/progs/test_sock_fields.c
>> index 246f1f001813..3e2e3ee51cc9 100644
>> --- a/tools/testing/selftests/bpf/progs/test_sock_fields.c
>> +++ b/tools/testing/selftests/bpf/progs/test_sock_fields.c
>> @@ -114,7 +114,7 @@ static void tpcpy(struct bpf_tcp_sock *dst,
>>
>> #define RET_LOG() ({ \
>> linum = __LINE__; \
>> - bpf_map_update_elem(&linum_map, &linum_idx, &linum, BPF_NOEXIST); \
>> + bpf_map_update_elem(&linum_map, &linum_idx, &linum, BPF_ANY); \
> Acked-by: Martin KaFai Lau <kafai@xxxxxx>
Thanks for the quick review.
I need to follow up with a v2. Was too quick to send this patch out by
itself. Now that the error reporting works, the test sock_fields tests
are failing on little- and big-endian.
