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Fri, 25 Sep 2026 15:16:50 +0000 (GMT) Received: from [9.111.133.14] (unknown [9.111.133.14]) by smtpav04.fra02v.mail.ibm.com (Postfix) with ESMTP; Fri, 25 Sep 2026 15:16:50 +0000 (GMT) Message-ID: <717d9c0e-83e9-4ad7-82b6-7970a0ba6729@linux.ibm.com> Date: Fri, 25 Sep 2026 17:16:50 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH net v3] net/iucv: require IUCV for AF_IUCV sockets From: Alexandra Winter To: netdev-bot+sashiko@kernel.org, hppiscas@163.com Cc: twinkler@linux.ibm.com, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, horms@kernel.org, linux-s390@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, borntraeger@linux.ibm.com References: <20260920034503.17322-1-hppiscas@163.com> <178996250579.2160803.3689804935882322466@kernel.org> Content-Language: en-US In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 X-Proofpoint-Reinject: loops=2 maxloops=12 X-Proofpoint-ORIG-GUID: 8l3E_mPJ93pvdEZdXYDMkRy1dVCP-3cz X-Authority-Analysis: v=2.4 cv=EOCTQFZC c=1 sm=1 tr=0 ts=6ab69067 cx=c_pps a=aDMHemPKRhS1OARIsFnwRA==:117 a=aDMHemPKRhS1OARIsFnwRA==:17 a=IkcTkHD0fZMA:10 a=VdqzKS8jKosA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=uAbxVGIbfxUO_5tXvNgY:22 a=iMySd7Nm5nv2uyiilLIA:9 a=QEXdDO2ut3YA:10 X-Proofpoint-Spam-Info: AW1haW4tMjYwOTI1MDA2MCBTYWx0ZWRfX51Gjsu18j+VV EH6ZslkAU8an3qoK2glBS6kfJS7j5o1aynZ4DR3dCW6Xi0+4PzLkXuTBUiCUZmNYWUIXitlLUaR rJJnezqZjvG1hfIKVvWoJz3cULiM4pE= X-Proofpoint-GUID: G-mNGDf8f4Q6p2hndv9kE6m8I3ukcCxz X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwOTI1MDA2MCBTYWx0ZWRfX3z769/oFiUAZ ahpBEjpvg6cGSmnvqzgcJjxfp78o539onsXMIwBLQ8qLh6F/dlskbyGI5Nh8XCeEGIJ3kmBGs7k gx+Juy4yd9EJmYRYJnamGoVFBYW/feHUBdnSXaD78MgFmKPE0VP4d6i+QgBNL9yLmfZGhuoEBgB H4Yp6a6LNxMAMO5tFCgJTGIGn+I5Tt+HeT1ix0aKToL8pzb0gcpHnVvLyhsZrEoIJEVIeJ1mg/d KRkFZI70izqMhsuj/DefgEJfjltg+NTtQHNfda1G9X7uerljgAKalaRd44kHBf6m+xvBmpVLG/N np7TGD62x4wjG7RkEz7qo28d2WbD/7F5Fa6NpUhe68m4ymXaDGn2hqgltVN9AHBwCw7HlytU4SI DUISRyF9CDwEMYU3i1t0Gl6XA3fUasyXOzayftfqSmwzpj25VWolhSlrvY3s5tDZV0lHIWCdJ0L UA9DOOS4Vw9M+ZEKe6w== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-09-25_02,2026-09-21_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 phishscore=0 priorityscore=1501 clxscore=1015 spamscore=0 adultscore=0 impostorscore=0 lowpriorityscore=0 suspectscore=0 malwarescore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2609040000 definitions=main-2609250060 On 24.09.26 20:52, Alexandra Winter wrote: > Actually even with your v2 IUCV=M, AF_IUCV=M builds fine in an LPAR, > but modprobe returns with > modprobe: ERROR: could not insert 'af_iucv': Protocol not supported (not expected) > modprobe: ERROR: could not insert 'iucv': Protocol not supported (expected) > > Is this a result of >> if (machine_is_vm() && ... >> err = -EPROTONOSUPPORT; > I don't fully understand it yet. > > But that combination can be defined, even with your v3, so we have another open issue here. > > I definitively need to test all possible combinations! (Should have done that earlier, I admit) That is the same root cause as IUCV=M, AF_IUCV=Y linker error with v2: the reference to `iucv_if'. So this probably would work with v3. Nevertheless, I'm working on a clean solution on top of your v2. Let me see if I can come up with that. Kind regards Alexandra