Re: [PATCH] df: new option --direct to not resolve a mount point

[Kamil Dudka]

On Tuesday 07 of April 2009 14:22:38 Pádraig Brady wrote:
> Kamil Dudka wrote:
> > Hello,
> >
> > I am attaching a single patch for df adding a new option --direct to not
> > resolve mount point and show statistics directly for a file. It can be
> > especially useful for NFS mount points if there is a boundary between two
> > storage policies behind the mount point.
>
> So this only changes the headings and not the values,
> and is only useful when multiple files specified?

I don't think so. If I run df with /home/kdudka/foo and /home is a mount point 
it calls statfs for /home. With the new --direct option it calls statfs 
directly for /home/kdudka/foo. The last column then shows the (canonized) 
file (or directory) name and not the mount point, therefore the change
in heading.

Consider a NFS mount point. If there is different quota set for a subtree on 
the remote storage, it shows different values with --direct.

> Why is --direct mutually exclusive with --local?

It does not make sense as any mount point resolving is bypassed and it always 
shows the statistics for given file (if exists).


Kamil