Fix for "Cluster size not supported" - resend

Rein Klazes wijn at
Wed Jan 5 13:14:07 CST 2005

On 05 Jan 2005 18:29:47 +0100, you wrote:

> Rein Klazes <wijn at> writes:
> > Totals size of the file system should be f_blocks * f_frsize, but that
> > gives a value 16 times too small. In this case f_blocks (as f_bfree,
> > f_bavail) are the number of f_bsize blocks, wrong. This is a quite
> > up-to-date system, Debian unstable with 2.6.10 kernel.
> > 
> > Attached is the simplest solution, fall back to fstatfs() on Linux
> > systems. It is btw also what 'df' does.
> Wouldn't it be easier to simply use f_bsize instead of f_frsize?  Why
> would switching to fstatfs be preferable?

Because as soon as fstatvfs is fixed (for some combination of
kernel/filesystem/libc), you are wrong again. The f_blocks, f_bfree and
other fields are supposed to be counted as f_frsize sized blocks. And at
least for nfs, f_frsize does not always equal f_bsize.

So if you use fstatvfs, you must use f_frsize. If that is broken you
must revert to fstatfs. 


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