Unable to run eBPF program that uses maps

Unable to run eBPF program that uses maps

[Radu Stoenescu]

I'm running this Ubuntu: Linux anemie 5.0.0-31-generic #33~18.04.1-Ubuntu SMP

I've cloned and compiled the Linux kernel - the same version and
config as of my machine's.

When trying to run the xdp_redirec_map sample program from samples/bpf I get:

sudo ./xdp_redirect_map 2 1
#=> failed to create map 0 (tx_port): 1 Operation not permitted

I read that, on certain systems, the default limit of locked memory
might pose problems, and I mitigated that as seen below:

ulimit -a

core file size          (blocks, -c) 0
data seg size           (kbytes, -d) unlimited
scheduling priority             (-e) 0
file size               (blocks, -f) unlimited
pending signals                 (-i) 31231
max locked memory       (kbytes, -l) 1024
max memory size         (kbytes, -m) unlimited
open files                      (-n) 1024
pipe size            (512 bytes, -p) 8
POSIX message queues     (bytes, -q) 819200
real-time priority              (-r) 0
stack size              (kbytes, -s) 8192
cpu time               (seconds, -t) unlimited
max user processes              (-u) 31231
virtual memory          (kbytes, -v) unlimited
file locks                      (-x) unlimited

What else can I try?

Regards
-- 
Radu Stoenescu

Re: Unable to run eBPF program that uses maps

[Toke Høiland-Jørgensen]

Radu Stoenescu <radu.stoe@gmail.com> writes:

> I'm running this Ubuntu: Linux anemie 5.0.0-31-generic #33~18.04.1-Ubuntu SMP
>
> I've cloned and compiled the Linux kernel - the same version and
> config as of my machine's.
>
> When trying to run the xdp_redirec_map sample program from samples/bpf I get:
>
> sudo ./xdp_redirect_map 2 1
> #=> failed to create map 0 (tx_port): 1 Operation not permitted
>
> I read that, on certain systems, the default limit of locked memory
> might pose problems, and I mitigated that as seen below:
>
> ulimit -a
>
> core file size          (blocks, -c) 0
> data seg size           (kbytes, -d) unlimited
> scheduling priority             (-e) 0
> file size               (blocks, -f) unlimited
> pending signals                 (-i) 31231
> max locked memory       (kbytes, -l) 1024

Is this run as your regular user? The limit will be reset in the sudo
environment that loads the program; so you'll need to set it as root (so
something like `sudo -i; ulimit -l 1024; ./xdp_redirect_map 2 1`)

-Toke