Debugging for DOCA Flow

[tmatuan96]

Hi all,

Tbh, I’m new to the DOCA API and development. I’m writing a program for Bluefield 2 DPU based on flow_shared_counter_sample.c

The program seems to work with some packets received at port 0, however, I don’t see any packet getting forwarded to port 1 (using tcpdump on port 1).

Thus, may I ask if

1. There is a way to debug the program?
2. How to print the header fields/content of packets received at port 0 and port 1 in real-time.
3. If the packet is matched or mismatched, and what fields are mismatched?
4. How to generate packet flow to test the program? I’m using netcat
   nc -s 192.168.10.4 -p 5678 192.168.10.1 1234

OVS: p0 → sf0 → flow_shared_counter_sample → sf1 → pf0hpf

Program output:

Thank you!

[xiaofengl]

You can use ovs-appctl dpctl dump flows.

https://docs.openvswitch.org/en/latest/howto/tc-offload/

https://www.man7.org/linux/man-pages/man8/ovs-dpctl.8.html

[tmatuan96]

@xiaofengl

ovs-appctl dpctl dump flows

Thank you for the timely reply, I got it to work. ovs-appctl dpctl/dump-flows this is the debug command I used.