[Unionfs] modprobe error on CentOS 5.2 (RHEL 5.2)

Nitin Bhardwaj mcabhardwaj at gmail.com
Tue Jan 27 08:04:49 EST 2009


Hi all,

I'm using CentOS 5.2 ( kernel 2.6.18.-92.el5 ), which is based on RHEL 5.2,
on a Pentium PC ( i386).
After looking around, I built the unionfs module from the following release
patch:

http://download.filesystems.org/unionfs/stable/unionfs-2.4_for_2.6.18-RHEL5.diff.gz
http://download.filesystems.org/unionfs/stable/unionfs-2.3.3_for_2.6.18-RHEL5.diff.gz

referenced in the thread:
http://www.mail-archive.com/unionfs@mail.fsl.cs.sunysb.edu/msg02973.html

on the RHEL kernel source distributed with the DVD media: *
kernel-2.6.18-92.el5.src.rpm*

The patch applies successfully, it compiles fine and the module gets built
successfully; But when I try to insert the module ( of course after depmod
-a ), I get the following error:

[root at localhost ~]# modprobe unionfs
FATAL: Error inserting unionfs
(/lib/modules/2.6.18-92.el5/kernel/fs/unionfs/unionfs.ko): Unknown symbol in
module, or unknown parameter (see dmesg)

The dmesg output is as follows:

unionfs: Unknown symbol vfs_splice_from
unionfs: Unknown symbol krealloc
unionfs: Unknown symbol lookup_one_len_nd
unionfs: Unknown symbol vfs_splice_to
unionfs: Unknown symbol vfs_path_lookup

---------------------------

I tried both unionfs-2.3.3 and unionfs-2.4 patches, with the same failure.
Please guide me if I'm missing anything here...

Thanks,
Nitin
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