Description of problem:
=======================

Any attempt to copy a regular file on NFS mount fails with "Invalid Argument". For example:
============

[root@wingo master_nfs]# pwd
/mnt/master_nfs
[root@wingo master_nfs]# ls
f.1
[root@wingo master_nfs]# cp -rf /etc/host* .
cp: cannot create regular file `./host.conf': Invalid argument
cp: cannot create regular file `./hosts': Invalid argument
cp: cannot create regular file `./hosts.allow': Invalid argument
cp: cannot create regular file `./hosts.deny': Invalid argument
[root@wingo master_nfs]# 
[root@wingo master_nfs]# cp -rf /etc/sysconfig/network-scripts/ifcfg-eth0 .
cp: cannot create regular file `./ifcfg-eth0': Invalid argument
[root@wingo master_nfs]# 

To confirm created a file and directory from nfs client which is successful as:
===============================================================================

[root@wingo master_nfs]# echo "hello" >> hello
[root@wingo master_nfs]# ls
f.1  hello
[root@wingo master_nfs]# 
[root@wingo master_nfs]# mkdir test
[root@wingo master_nfs]# 

Copy of dir to another directory in NFS client succeed but copy of regular file to another regular file failed as:
===============================================================================

[root@wingo master_nfs]# cp -r test test1
[root@wingo master_nfs]# touch a
[root@wingo master_nfs]# cp a b
cp: cannot create regular file `b': Invalid argument
[root@wingo master_nfs]# 
[root@wingo master_nfs]# cp hello hello1
cp: cannot create regular file `hello1': Invalid argument
[root@wingo master_nfs]# 



Version-Release number of selected component (if applicable):
=============================================================

glusterfs-3.7dev-0.869


How reproducible:
=================

always


Steps to Reproduce:
===================
1. Create a cluster
2. Create and start a volume (master)
3. Mount the volume on client (NFS mount) and cd to it
4. cp -rf /etc/host* .

Actual results:
===============

Fails with invalid argument


Expected results:
=================

Should successful copy the files to the nfs client