linux-kernel - Re: nfs mount failed with ipv6 addr

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Message-ID: <faf777ea-3667-45c7-b7f2-111b9f789e73@windriver.com>
Date: Thu, 22 May 2025 12:35:56 +0800
From: Haixiao Yan <haixiao.yan.cn@...driver.com>
To: NeilBrown <neil@...wn.name>
Cc: chuck.lever@...cle.com, stable@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: nfs mount failed with ipv6 addr


On 2025/5/22 07:32, NeilBrown wrote:
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>
> On Thu, 22 May 2025, Yan, Haixiao (CN) wrote:
>> On linux-5.10.y, my testcase run failed:
>>
>> root@...el-x86-64:/opt/wr-test/testcases/userspace/nfs-utils_v6# mount -t nfs [::1]:/mnt/nfs_root /mnt/v6 -o nfsvers=3
>> mount.nfs: requested NFS version or transport protocol is not supported
>>
>> The first bad commit is:
>>
>> commit 7229200f68662660bb4d55f19247eaf3c79a4217
>> Author: Chuck Lever <chuck.lever@...cle.com>
>> Date:   Mon Jun 3 10:35:02 2024 -0400
>>
>>     nfsd: don't allow nfsd threads to be signalled.
>>
>>     [ Upstream commit 3903902401451b1cd9d797a8c79769eb26ac7fe5 ]
>>
>>
>> Here is the test log:
>>
>> root@...el-x86-64:/opt/wr-test/testcases/userspace/nfs-utils_v6# dd if=/dev/zero of=/tmp/nfs.img bs=1M count=100
>> 100+0 records in
>> 100+0 records out
>> 104857600 bytes (105 MB, 100 MiB) copied, 0.0386658 s, 2.7 GB/s
>> root@...el-x86-64:/opt/wr-test/testcases/userspace/nfs-utils_v6# mkfs /tmp/nfs.img
>> mke2fs 1.46.1 (9-Feb-2021)
>> Discarding device blocks:   1024/102400.............             .............done
>> Creating filesystem with 102400 1k blocks and 25688 inodes
>> Filesystem UUID: 77e3bc56-46bb-4e5c-9619-d9a0c0999958
>> Superblock backups stored on blocks:
>>        8193, 24577, 40961, 57345, 73729
>>
>> Allocating group tables:  0/13.....     .....done
>> Writing inode tables:  0/13.....     .....done
>> Writing superblocks and filesystem accounting information:  0/13.....     .....done
>> root@...el-x86-64:/opt/wr-test/testcases/userspace/nfs-utils_v6# mount /tmp/nfs.img /mnt
>>
>> root@...el-x86-64:/opt/wr-test/testcases/userspace/nfs-utils_v6# mkdir /mnt/nfs_root
>>
>> root@...el-x86-64:/opt/wr-test/testcases/userspace/nfs-utils_v6# touch /etc/exports
>>
>> root@...el-x86-64:/opt/wr-test/testcases/userspace/nfs-utils_v6# echo '/mnt/nfs_root *(insecure,rw,async,no_root_squash)' >> /etc/exports
>>
>> root@...el-x86-64:/opt/wr-test/testcases/userspace/nfs-utils_v6# /opt/wr-test/bin/svcwp.sh nfsserver restart
>> stopping mountd: done
>> stopping nfsd: ..........failed
>>    using signal 9:
>> ..........failed
> What does your "nfsserver" script do to try to stop/restart the nfsd?
> For a very long time the approved way to stop nfsd has been to run
> "rpc.nfsd 0".  My guess is that whatever script you are using still
> trying to send a signal to nfsd.  That no longer works.
>
> Unfortunately the various sysv-init scripts for starting/stopping nfsd
> have never been part of nfs-utils so we were not able to update them.
> nfs-utils *does* contain systemd unit files for sites which use systemd.
>
> If you have a non-systemd way of starting/stopping nfsd, we would be
> happy to make the relevant scripts part of nfs-utils so that we can
> ensure they stay up to date.

Actually, we use  service nfsserver restart  =>
/etc/init.d/nfsserver =>

stop_nfsd(){
     # WARNING: this kills any process with the executable
     # name 'nfsd'.
     echo -n 'stopping nfsd: '
     start-stop-daemon --stop --quiet --signal 1 --name nfsd
     if delay_nfsd || {
         echo failed
         echo ' using signal 9: '
         start-stop-daemon --stop --quiet --signal 9 --name nfsd
         delay_nfsd
     }
     then
         echo done
     else
         echo failed
     fi
}

Thanks,

Haixiao

> Thanks,
> NeilBrown