mount - unknown option rdma

[Shirish Pargaonkar]

On 2/8/08, James Lentini <jlentini at netapp.com> wrote:
>
>
> On Thu, 7 Feb 2008, Shirish Pargaonkar wrote:
>
> > If I use mount command as stated in the document
> >  http://nfs-rdma.sourceforge.net/Documents/README
> > this is what I get.
> >
> > client:~ # mount 1.2.3.131:/ /mnt -i -o rdma,port=2050
> > unknown nfs mount option: rdma
> >
> > client:~ # mount 1.2.3.131:/ /mnt -o rdma,port=2050
> > mount.nfs: Unsupported nfs mount option: rdma
> >
> >
> > client:# /sbin/mount.nfs -V
> > mount.nfs (linux nfs-utils 1.1.1)
>
> That's a mistake in the documentation. You should run:
>
>  mount.nfs 1.2.3.131:/ /mnt -i -o rdma,port=2050
>
> > With -i option, /sbin/mount.nfs is not called.  I do not where is the source
> > for the binary mount (/bin/mount) and how the message
> >   unknown nfs mount option: rdma
> > is spit out. I see that message in file nfs4mount.c.
> > Not sure how did it figure out that it is nfs type of filesystem that is
> > being mounted without specifying -t option, I guess nfs code is
> > built in the mount command.
>
> mount can figure it out automatically, but the -i option instructs it
> not to call /sbin/mount.<filesystem> even if it exists. See mount(8)
> for details.
>
> > Without -i mount.nfs is called which spits out the message
> >   mount.nfs: Unsupported nfs mount option: rdma
> > and the mount.nfs (/sbin/mount.nfs) version is 1.1.1
> >
> > So looks like neither /bin/mount not /sbin/mount.nfs recognize rdma option.
>
> What was the output of?
>
>  mount.nfs 1.2.3.131:/ /mnt -i -o rdma,port=2050
>
> > ethernet interfaces ping and ib interfaces ping.  I can ssh from
> > server to client on either interfaces.  So I am not sure it is a
> > connectivity problem.
>

The output

client:~ # mount.nfs 1.2.3.131:/ /mnt -i -o rdma,port=2050
mount.nfs: Connection timed out

Without -i

client:~ # mount.nfs 1.2.3.131:/ /mnt -o rdma,port=2050
mount.nfs: Unsupported nfs mount option: rdma

If we are invoking mount.nfs explicitly, is -i option needed?

Regards,

Shirish