linux-kernel - Re: [PATCH 0/2] Fix /proc/sys/fs/nfs/nsm_use

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Message-ID: <98549025-d163-0ce4-0a9d-9da3ee945f44@gmail.com>
Date:   Wed, 4 Aug 2021 10:12:25 +0800
From:   Jia He <hejianet@...il.com>
To:     Thomas Huth <thuth@...hat.com>, linux-kernel@...r.kernel.org,
        linux-fsdevel@...r.kernel.org, linux-nfs@...r.kernel.org
Cc:     "J. Bruce Fields" <bfields@...ldses.org>,
        Chuck Lever <chuck.lever@...cle.com>,
        Trond Myklebust <trond.myklebust@...merspace.com>,
        Anna Schumaker <anna.schumaker@...app.com>,
        Luis Chamberlain <mcgrof@...nel.org>,
        Kees Cook <keescook@...omium.org>,
        Iurii Zaikin <yzaikin@...gle.com>, linux-s390@...r.kernel.org,
        Pan Xinhui <xinhui.pan@...ux.vnet.ibm.com>
Subject: Re: [PATCH 0/2] Fix /proc/sys/fs/nfs/nsm_use_hostnames on big endian
 machines


On 2021/8/3 18:59, Thomas Huth wrote:
> There is an endianess problem with /proc/sys/fs/nfs/nsm_use_hostnames
> (which can e.g. be seen on an s390x host) :
>
>   # modprobe lockd nsm_use_hostnames=1
>   # cat /proc/sys/fs/nfs/nsm_use_hostnames
>   16777216
>
> The nsm_use_hostnames variable is declared as "bool" which is required
> for the correct type for the module parameter. However, this does not
> work correctly with the entry in the /proc filesystem since this
> currently requires "int".
>
> Jia He already provided patches for this problem a couple of years ago,
> but apparently they felt through the cracks and never got merged. So
> here's a rebased version to finally fix this issue.
>
> Buglink: https://bugzilla.redhat.com/show_bug.cgi?id=1764075
>
> Jia He (2):
>    sysctl: introduce new proc handler proc_dobool
>    lockd: change the proc_handler for nsm_use_hostnames

Thanks for picking them up ;-)

---
Cheers,
Justin (Jia He)