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Fri, 18 Feb 2022 20:19:04 +0000 (GMT) From: Alexander Egorenkov To: memxor@gmail.com Cc: andrii@kernel.org, ast@kernel.org, bpf@vger.kernel.org, brouer@redhat.com, daniel@iogearbox.net, fw@strlen.de, john.fastabend@gmail.com, kafai@fb.com, maximmi@nvidia.com, netdev@vger.kernel.org, netfilter-devel@vger.kernel.org, pablo@netfilter.org, songliubraving@fb.com, toke@redhat.com, yhs@fb.com Subject: Re: [PATCH bpf-next v8 00/10] Introduce unstable CT lookup helpers In-Reply-To: <20220114163953.1455836-1-memxor@gmail.com> In-Reply-To: Date: Fri, 18 Feb 2022 21:19:04 +0100 Message-ID: <87y228q66f.fsf@oc8242746057.ibm.com> MIME-Version: 1.0 Content-Type: text/plain X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: q2_JNrD740B6SxTKVCCClWOnps0ppJT3 X-Proofpoint-GUID: k7ymj4nEborQ3HFmzCFJ5UAQe6Me-811 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.816,Hydra:6.0.425,FMLib:17.11.62.513 definitions=2022-02-18_09,2022-02-18_01,2021-12-02_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 bulkscore=0 suspectscore=0 clxscore=1011 priorityscore=1501 lowpriorityscore=0 mlxscore=0 impostorscore=0 adultscore=0 spamscore=0 mlxlogscore=999 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2201110000 definitions=main-2202180123 Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org Hi, we are having a problem loading nf_conntrack on linux-next: # modprobe nf_conntrack modprobe: ERROR: could not insert 'nf_conntrack': Unknown symbol in module, or unknown parameter (see dmesg) modprobe: ERROR: Error running install command '/sbin/modprobe --ignore-install nf_conntrack && /sbin/sysctl --quiet --pattern 'net[.]netfilter[.]nf_conntrack.*' --system' for module nf_conntrack: retcode 1 modprobe: ERROR: could not insert 'nf_conntrack': Invalid argument # dmesg [ 3728.188969] missing module BTF, cannot register kfuncs [ 3748.208674] missing module BTF, cannot register kfuncs [ 3748.567123] missing module BTF, cannot register kfuncs [ 3873.597276] missing module BTF, cannot register kfuncs [ 3874.017125] missing module BTF, cannot register kfuncs [ 3882.637097] missing module BTF, cannot register kfuncs [ 3883.507213] missing module BTF, cannot register kfuncs [ 3883.876878] missing module BTF, cannot register kfuncs # zgrep BTF /proc/config.gz CONFIG_DEBUG_INFO_BTF=y CONFIG_PAHOLE_HAS_SPLIT_BTF=y CONFIG_DEBUG_INFO_BTF_MODULES=y It seems that nf_conntrack.ko is missing a .BTF section which is present in debuginfo within /usr/lib/debug/lib/modules/*/kernel/net/netfilter/nf_conntrack.ko.debug instead. Am i correct in assuming that this is not supported (yet) ? We use pahole 1.22 and build linux-next on Fedora 35 as a set of custom packages. Architecture is s390x. Thanks Regards Alex