[Bugs] [Bug 1367881] New: Replicate+arbiter volume size reported differently for NFS

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1367881

            Bug ID: 1367881
           Summary: Replicate+arbiter volume size reported differently for
                    NFS
           Product: GlusterFS
           Version: 3.7.2
         Component: replicate
          Severity: medium
          Assignee: bugs at gluster.org
          Reporter: BSipos at rkf-eng.com
                CC: bugs at gluster.org



Description of problem:
I have created a replica-3 volume with one arbiter (having a much smaller disk
than the other two). When mounted as glusterfs the volume shows correct total
size (3.6TiB) but when mounted as NFS the volume shows the size of the arbiter
brick (860GiB). I'm using this within oVirt, so the perceived volume size
limits how much storage the oVirt engine will allow in a volume.

Version-Release number of selected component (if applicable):
3.7.2 built on Jun 23 2015 12:07:13

How reproducible:
always

Steps to Reproduce:
1. Create a volume with "gluster volume create testvol replica 3 arbiter 1 ..."
2. Mount the volume with "mount -tglusterfs ...:/testvol /mnt" and observe "df
-h /mnt" shows large size. 
3. Unmount as glusterfs.
4. Mount the volume with "mount -tnfs4 ...:/testvol /mnt" and observe "df -h
/mnt" shows much smaller size.
5. Unmount as NFS.

Actual results:
The "size" of the replicate volume is mis-reported as the size of the smallest
brick, ignoring arbiter status.

Expected results:
The volume size should be computed from the non-arbiter bricks. At least the
two network FS mounts should agree on how much space is available.

Additional info:

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