This is exactly what `bpftool map` is doing. The source code
https://github.com/torvalds/linux/blob/master/tools/bpf/bpftool/map.c

You can find the map you are interested by iterating all the maps in the system
and then iterating to get all map key/values for that map.

On Mon, Dec 24, 2018 at 9:41 AM Иван Иванов <[email protected]> wrote:
>
> Can you give link or some code to understand, how can i get data from maps in 
> c. I saw example, but as i begginer in such programming, i can understand 
> map_fd, obj...etc.
> I create xdp prog, inserted in via ip link set... And can see data with 
> bpftool in hex. How can i simply write a prog to get data from map without 
> writing code to load. I am now at start of the way  )
> 

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