GNU bug report logs - #15083
mknod fails over NFS

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Manish Gupta <guptamanish1983 <at> gmail.com>
To: bug-coreutils <at> gnu.org
Subject: MKNOD issue
Date: Tue, 13 Aug 2013 14:19:45 +0530

[Message part 1 (text/plain, inline)]

while trying to create block device file using mknod in linux root
directory , its working fine.But when i try to create in NFS mounted
volume, hitting with error "operation not permitted".

Is it a bug or or any workaround to overcome this.

-- 
Thanks
-Manish

[Message part 2 (text/html, inline)]

Message #8 received at 15083 <at> debbugs.gnu.org (full text, mbox):

From: Paul Eggert <eggert <at> cs.ucla.edu>
To: Manish Gupta <guptamanish1983 <at> gmail.com>
Cc: 15083 <at> debbugs.gnu.org
Subject: Re: bug#15083: MKNOD issue
Date: Tue, 13 Aug 2013 07:45:17 -0700

Manish Gupta wrote:
> when i try to create in NFS mounted
> volume, hitting with error "operation not permitted".

It sounds like your NFS server is not permitting it.
If so, it's not mknod's fault.  You can double-check
by running 'strace mknode' and seeing what system calls
it's using.

Message #11 received at 15083 <at> debbugs.gnu.org (full text, mbox):

From: Bob Proulx <bob <at> proulx.com>
To: Manish Gupta <guptamanish1983 <at> gmail.com>, 15083 <at> debbugs.gnu.org
Subject: Re: bug#15083: MKNOD issue
Date: Tue, 13 Aug 2013 14:24:09 -0600

retitle 15083 mknod fails over NFS
tag 15083 + moreinfo
thanks

Paul Eggert wrote:
> Manish Gupta wrote:
> > when i try to create in NFS mounted
> > volume, hitting with error "operation not permitted".
> 
> It sounds like your NFS server is not permitting it.
> If so, it's not mknod's fault.  You can double-check
> by running 'strace mknode' and seeing what system calls
> it's using.

As far as I know NFS does not support the making of device nodes.
Remember that NFS is not a POSIX compliant filesystem.  It only
supports a subset of file operations.

You are asking mknod to do something that the kernel/filesystem does
not support.  Therefore it is failing and telling you that the
operation is not permitted.  In this case it is not permitted by the
system kernel.

This is not anything that a userland utility like mknod can do
anything about.  It is not a bug in mknod.  And mknod is operating
correctly by emitting the error message.

In order to know more you would need to tell us what command you were
running that failed.  And also include what type of system you were
running on and what type of file system you were using.

Bob

Message #18 received at 15083 <at> debbugs.gnu.org (full text, mbox):

From: Assaf Gordon <assafgordon <at> gmail.com>
To: 15083 <at> debbugs.gnu.org
Subject: Re: bug#15083: MKNOD issue
Date: Tue, 23 Oct 2018 16:50:42 -0600

close 15083
stop

(triaging old bugs)

On 13/08/13 02:24 PM, Bob Proulx wrote:
> 
> Paul Eggert wrote:
>> Manish Gupta wrote:
>>> when i try to create in NFS mounted
>>> volume, hitting with error "operation not permitted".
>>
>> It sounds like your NFS server is not permitting it.
>> If so, it's not mknod's fault.  You can double-check
>> by running 'strace mknode' and seeing what system calls
>> it's using.
> 
> As far as I know NFS does not support the making of device nodes.
> Remember that NFS is not a POSIX compliant filesystem.  It only
> supports a subset of file operations.
> 
[...]
> In order to know more you would need to tell us what command you were
> running that failed.  And also include what type of system you were
> running on and what type of file system you were using.

With no further comments in 5 years, I'm closing this bug.

-assaf

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