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Tue, 10 Dec 2024 09:59:49 GMT Received: from smtpav03.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 6AD6420043; Tue, 10 Dec 2024 09:59:49 +0000 (GMT) Received: from smtpav03.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 3714720040; Tue, 10 Dec 2024 09:59:49 +0000 (GMT) Received: from li-ce58cfcc-320b-11b2-a85c-85e19b5285e0 (unknown [9.152.224.212]) by smtpav03.fra02v.mail.ibm.com (Postfix) with ESMTP; Tue, 10 Dec 2024 09:59:49 +0000 (GMT) Date: Tue, 10 Dec 2024 10:59:47 +0100 From: Halil Pasic To: Guangguan Wang Cc: Wenjia Zhang , jaka@linux.ibm.com, alibuda@linux.alibaba.com, tonylu@linux.alibaba.com, guwen@linux.alibaba.com, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, horms@kernel.org, linux-rdma@vger.kernel.org, linux-s390@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Dust Li , Halil Pasic Subject: Re: [PATCH net-next v2 2/2] net/smc: support ipv4 mapped ipv6 addr client for smc-r v2 Message-ID: <20241210105947.466674a4.pasic@linux.ibm.com> In-Reply-To: <58075d86-b43a-4d58-bf64-c29418f99143@linux.alibaba.com> References: <20241202125203.48821-1-guangguan.wang@linux.alibaba.com> <20241202125203.48821-3-guangguan.wang@linux.alibaba.com> <894d640f-d9f6-4851-adb8-779ff3678440@linux.ibm.com> <20241205135833.0beafd61.pasic@linux.ibm.com> <5ac2c5a7-3f12-48e5-83a9-ecd3867e6125@linux.alibaba.com> <7de81edd-86f2-4cfd-95db-e273c3436eb6@linux.ibm.com> <3710a042-cabe-4b6d-9caa-fd4d864b2fdc@linux.ibm.com> <868f5d66-ac74-4b0a-a0d0-e44fdea3bb73@linux.ibm.com> <20241209104647.5c36c429.pasic@linux.ibm.com> <85d1c6e1-0fe3-4c71-af4e-8015270b90dc@linux.alibaba.com> <20241209214449.0bb5afce.pasic@linux.ibm.com> <58075d86-b43a-4d58-bf64-c29418f99143@linux.alibaba.com> Organization: IBM X-Mailer: Claws Mail 3.17.8 (GTK+ 2.24.32; x86_64-redhat-linux-gnu) Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-GUID: dHsgy1URY5S9tEcSQkFfxg7h82R871U5 X-Proofpoint-ORIG-GUID: 2Ce0Tx0GAoXpvCY_w4Jxbxfc-J6aTeY2 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1051,Hydra:6.0.680,FMLib:17.12.62.30 definitions=2024-10-15_01,2024-10-11_01,2024-09-30_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 suspectscore=0 spamscore=0 clxscore=1015 priorityscore=1501 lowpriorityscore=0 impostorscore=0 bulkscore=0 mlxscore=0 malwarescore=0 mlxlogscore=857 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2411120000 definitions=main-2412100074 On Tue, 10 Dec 2024 15:07:04 +0800 Guangguan Wang wrote: > On 2024/12/10 04:44, Halil Pasic wrote: > > On Mon, 9 Dec 2024 20:36:45 +0800 > > Guangguan Wang wrote: > > > >>> I believe we would like to have a v3 here. Also I'm not sure > >>> checking on saddr is sufficient, but I didn't do my research on > >>> that question yet. > >>> > >>> Regards, > >>> Halil > >> > >> Did you mean to research whether the daddr should be checked too? > > > > Right! Or is it implied that if saddr is a ipv4 mapped ipv6 addr > > then the daddr must be ipv4 mapped ipv6 addr as well? > > > > Regards, > > Halil > > I did a test by iperf3: > A server with IPV4 addr 11.213.5.33/24 and real IPV6 addr 2012::1/64. > A client with IPV4 addr 11.213.5.5/24 and real IPV6 addr 2012::2/64. > iperf3 fails to run when server listen on IPV6 addr and client connect > to server using IPV4 mapped IPV6 addr. commands show below: > server: smc_run iperf3 -s -6 -B 2012::1 > client: smc_run iperf3 -t 10 -c 2012::1 -6 -B ::ffff:11.213.5.5 > > Failure happened due to the connect() function got the errno -EAFNOSUPPORT, > I also located the kernel code where the -EAFNOSUPPORT is returned > (https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next.git/tree/net/ipv6/ip6_output.c#:~:text=err%20%3D%20%2DEAFNOSUPPORT%3B). Thanks! That is enough for me!