Issue with tcpconnect.c Example: Error Creating Ring Buffer Map

[shayjr122]

Hello,

I am attempting to use the tcpconnect.c example from the repository and I'm encountering an issue with the creation of the counter_events_ring ring buffer map. The specific error message I'm encountering is as follows:

Error: map counter_events_ring: map create: invalid argument
2023/08/11 14:47:03 exiting: map counter_events_ring: map create: invalid argument

I have reviewed my code and the map definition, and I believe I have followed the instructions correctly. Here is the relevant map definition from my code:

struct {
	__uint(max_entries, 1 << 24);
	__uint(type, BPF_MAP_TYPE_RINGBUF);
	__type(value, struct dimensions_t);
} counter_events_ring SEC(".maps");

Could you please provide some guidance on what might be causing this "invalid argument" error during map creation? Are there any specific considerations I should be aware of when using ring buffer map?

Thank you for your assistance.

Shay Reuven

[krisztianfekete]

Hi, thanks for the report!
Is it possible that you are using release v0.0.14 and the latest examples from the main branch? If yes, this might be because #103 was merged recently, and we haven't released a new CLI yet.

I think if you build the project, or use the previous version of the examples (before the PR above) you should succeed.