+++ This bug was initially created as a clone of Bug #519112 +++

Escalated to Bugzilla from IssueTracker

--- Additional comment from tumeya on 2009-08-25 04:36:48 EDT ---

Description of problem:
statfs on NFS partition always returns 0 regardless of success/fail. 

Steps to Reproduce:
1. Start NFS service:
    # echo "/test        *(rw,no_root_squash)" >> /etc/exports
    # service nfs start
2. Setup client:
    # mount -t nfs -o soft,timeo=5 server:/test /mnt/nfs
3. Stop NFS service:
    # service nfs stop
4. From the client, run the attached test program:

Actual results:
The program returns with 0, which actually should return negative number according to statfs(2) but returns 0. 

Expected results: 
Should return negative number. 

According to the call trace nfs_statfs is not returning the value properly. 
sys_statfs() => return 0
  vfs_statfs() => return 0
    nfs_statfs() => return 0
      nfs3_proc_statfs() => return -5

The patch is already upstream: 
1a0ba9ae485c5fd17d0bff2f14d9dd75b8985593

--- Additional comment from tumeya on 2009-08-25 04:40:03 EDT ---

Created an attachment (id=358536)
proposed patch

--- Additional comment from tumeya on 2009-08-25 04:51:55 EDT ---

Created an attachment (id=358538)
reproducer code

--- Additional comment from jlayton on 2009-08-28 06:39:36 EDT ---

I've added the above patch to my test kernels:

http://people.redhat.com/jlayton

...if you or they are able to test it and verify that it works, then that would be helpful.