Red Hat Bugzilla – Bug 432544
GFS: write error on NFS export under 2.6.25-rc1 with gfs-kernel from CVS
Last modified: 2010-01-11 22:28:33 EST
Description of problem:
Write errors occur when writing to a file over NFS located on a GFS filesystem.
Version-Release number of selected component (if applicable):
Built from CVS
Consistently reproducible against recent kernels.
Steps to Reproduce:
1. Server is fully patched RHEL5 x86_64 system with csgfs packages from RHN.
Obtain recent kernel (2.6.24 and 2.6.25-rc1 tested ) and cluster suite from CVS
2. If using 2.6.24, patch GFS2 code using
lest you lose data on your GFS2 volumes. If using 2.6.25-rc1, modify gfs-kernel
sys.c to updated kobject calls (changes I made attached in diff for reference)
3. Build kernel, configure cluster suite and build gfs-kernel. Copy gfs.ko to
4. Reboot with new kernel, verified GFS and GFS2 work properly from local
system. Export GFS filesystem to fully patched RHEL5 x86_64 NFS client.
5. On client, copy file to NFS/GFS filesystem. The file will be created but
errors will occur on issuing a close() and the file will contain no data.
Directly echoing text to a file works.
[root@nccws00 gfs]# cp /tmp/patch-18.104.22.168.bz2 .
cp: closing `./patch-22.214.171.124.bz2': Invalid argument
and a snippet from strace on the NFS client from the above command:
\344\f\0218\37P"..., 4096) = 264
\344\f\0218\37P"..., 264) = 264
read(3, "", 4096) = 0
close(4) = -1 EINVAL (Invalid argument)
Tested against 2.6.24, 2.6.24-1 2.6.24-2 2.6.24-git18 and 2.6.25-rc1 with
cluster obtained from CVS HEAD for each attempt. Kernel config copied from
/usr/src/kernels/ and a make menuconfig performed. NFS exports of the GFS
filesystem work when using a Red Hat (via RHN) kernel. There are no apparent
errors in any logs on either client or server.
Created attachment 294690 [details]
Changes made to sys.c for new kobject calls
Thanks for the patch to sys.c. I'll make sure it gets in there.
I've successfully recreated the problem, so that's a good first step.
The nfs code for gfs (mainly, ops_export.c) has changed quite a bit
from the RHEL5 original. I'll try to check if those changes were done
Fabio D. updated the gfs kernel code to include this patch with this
commit to the cluster git tree:
Since this only affects upstream kernels, I'm closing this as UPSTREAM.