Re: Query on eBPF Map iterator in Kernel space

On Mon, Mar 1, 2021 at 6:44 AM Toke Høiland-Jørgensen <[email protected]> wrote:
>
> Shwetha Vittal <[email protected]> writes:
>
> > Hi,
> >
> > Is there any way to iterate through eBPF Map elements in kernel space.
> > I know that there is one at user space bpf_map_get_next_key(). But it
> > doesn't work when tried in kernel space. I have a requirement to find
> > the record in the eBPF map which has the least value in kernel space
> > and pick it for further packet processing and therefore need to
> > iterate through eBF Map .
>
> There will be soon:
> https://lore.kernel.org/bpf/[email protected]/

What kind of maps are you trying to iterate? The above patch set
supports hash and array maps. Also, the above patch set has been
merged into bpf-next repo. Feel free to experiment with it!

>
> -Toke
>