On 5/20/2024 10:42 PM, Luca Boccassi wrote: > On Mon, 20 May 2024 at 19:43, Stephen Hemminger > <step...@networkplumber.org> wrote: >> >> On Mon, 20 May 2024 18:49:19 +0100 >> Ferruh Yigit <ferruh.yi...@amd.com> wrote: >> >>> On 5/2/2024 10:31 PM, Stephen Hemminger wrote: >>>> There were multiple issues in the RSS queue support in the TAP >>>> driver. This required extensive rework of the BPF support. >>>> >>>> Change the BPF loading to use bpftool to >>>> create a skeleton header file, and load with libbpf. >>>> The BPF is always compiled from source so less chance that >>>> source and instructions diverge. Also resolves issue where >>>> libbpf and source get out of sync. The program >>>> is only loaded once, so if multiple rules are created >>>> only one BPF program is loaded in kernel. >>>> >>>> The new BPF program only needs a single action. >>>> No need for action and re-classification step. >>>> >>>> It also fixes the missing bits from the original. >>>> - supports setting RSS key per flow >>>> - level of hash can be L3 or L3/L4. >>>> >>>> Bugzilla ID: 1329 >>>> >>>> Signed-off-by: Stephen Hemminger <step...@networkplumber.org> >>>> >>> >>> >>> The libbpf version in my Ubuntu box, installed with package manager, is >>> 'libbpf.so.0.5.0', so it doesn't satisfy the requirement and bpf support >>> is not compiled for me. >>> >>> >>> @Christian, 'libbpf.so.0.5.0'seems old, it is from 2021, do you know is >>> there a reason Ubuntu stick to this version? And can we expect an update >>> soon? >>> >>> >>> @Patric, I assume test environment also doesn't have 'libbpf', version: >>> '>= 1.0' which we need to test this feature. >>> Is it possible to update test environment to justify this dependency? >>> >>> I think we need to verify at least build (with and without dependency >>> met) for the set. >> >> The BPF API changed a lot, and it is not really possible to support >> both. > > It can be done, but it is a _lot_ of work and requires a lot of shims, > so for something optional it's not really worth it. Given libbpf 1.0 > also broke ABI, Ubuntu 22.04 and older cannot really get a new version > as it's incompatible, so this pmd will simply be skipped there. I > think it's fine. 24.04 has a new one. >
Does Ubuntu 24.04 have libbpf >= 1.0 ?
