New CentOS4/RHEL4-compatible xfs module rpms

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That's odd. You have the module on the server, exporting an xfs filesystem, and you're getting permission denied on the client?

Yep. And rmmod'ing the updated XFS module and insmod'ing the older module makes it work again.

Quoted 4 lines

Quoted 2 lines

That's odd. You have the module on the server, exporting an xfs filesystem, and you're getting permission denied on the client?

Yep. And rmmod'ing the updated XFS module and insmod'ing the older module makes it work again.

The 'stock' RHEL4/CentOS4 kernels don't have xfs modules - so, I guess you have rebuilt your kernel with the XFS code that is there by default?

If this is the case, then this _may be_ the cause of the problem ... the updated xfs module code uses any existing XFS configs in the kernel you are building against - the Makefile states:

# Set up our config.
#
# If the kernel already has an XFS config, use it.
# Else if config.xfs is here, use it for our config. Otherwise, # Else default to only CONFIG_XFS_FS=m (simplest config)

The problem is that the 'stock' 2.6.9 kernel doesn't define (or use) CONFIG_XFS_EXPORT - but the updated xfs module code requires this to allow NFS exports of a XFS file system ...

So my guess is that your re-built updated xfs modules don't use CONFIG_XFS_EXPORT

I guess with a bit of hacking to the Makefile, you could force 'CONFIG_XFS_EXPORT=y' to be added - you might even be able to do this via the rpmbuild command line ... although I don't know how.