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daandemeyer avatar qdeslandes avatar rphibel avatar

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bpfilter's Issues

Document minimum-known linux kernel version requirement

Potentially pairs with the new README.md note about libbpf 1.0 requirement.
This could also simply be a listing of the the earliest known-working/developer-tested version(s) of the kernel.

As of PR #12 I can't build on my kernel 5.15.x-based system. It seems the bpf_dynptr was introduced to bpf-next in May 2022. Guessing that puts a minimum kernel for dynptr somewhere around 5.18 or 5.19, which is past that of stock Ubuntu, RHEL, and SLE/SUSE releases according to wikipedia. libbpf 1.0.0 was August 22, 2022, so if libbpf and kernel need to move in-step, perhaps the required kernel is 6.0 or newer?

Totally understand if maintainers want to focus on current kernel releases rather than optional configs and work-around for old kernels, but might help avoid further "issue" reports to document a known minimum.

Compiled bpfilter doesn't load: No such file or directory

Hello @qdeslandes,

I have just compiled the bpfilter module on both the linux-6.1.14 branch and the bpf-next branch, both times I get the following output in dmesg:

[    4.619942] bpfilter: Loaded bpfilter_umh pid 971
[    4.622811] bpfilter: generate forward packet assessment
[    4.622823] bpfilter: generate forward packet assessment
[    4.625250] bpfilter: failed to create TC hook: No such file or directory
[    4.625348] bpfilter: failed to load chain INPUT in table filter: processed 73 insns (limit 1000000) max_states_per_insn 0 total_states 4 peak_states 4 mark_read 3
[    4.625455] bpfilter: failed to install new table 'filter': No such file or directory
[    4.625578] bpfilter: failed to created filter table: No such file or directory
[    4.625807] bpfilter: read fail 0

Would you happen to know if I did something wrong?

Thanks a lot,
Mr. Hax

LAB testing

Hi , I install it but when i use iptables with option i have error iptables v1.8.9 (nf_tables): unknown option "--bpf".
How to install it correctly and using it?
i already start it @bpfilter/build/src# ./bpfilter
info : restored new codegen at 0x8006f0
info : restored new codegen at 0x800bb0
info : restored new codegen at 0x801070
info : cache already initialised, skipping initialisation
info : waiting for requests...

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