Bug 1438330

+++ This bug was initially created as a clone of Bug #1433506 +++

Description of problem:
Master and slave geo-rep auxiliary mounts are not accessible to user to take
client profile info or do any other client stack analysis. The mounts are lazy unmounted after changing the current directory to the respective mount point.
So that only geo-rep worker has access to it.

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

How reproducible:
Always

Steps to Reproduce:
1. Setup geo-rep session between master and slave volume
2. Try to take the client side profile info of either master volume or slave volume


Actual results:
Not able to take client profile info of active geo-rep master and slave mount points on which I/O is happening

Expected results:
When needed, it should be possible to take client profile info of active geo-rep master and slave mount points on which I/O is happening

Additional info:

--- Additional comment from Worker Ant on 2017-03-17 16:02:14 EDT ---

REVIEW: https://review.gluster.org/16912 (geo-rep: Optionally allow access to mounts) posted (#1) for review on master by Kotresh HR (khiremat)

--- Additional comment from Worker Ant on 2017-03-19 23:33:40 EDT ---

COMMIT: https://review.gluster.org/16912 committed in master by Vijay Bellur (vbellur) 
------
commit e2a652ca6ba56235e6d64bf7df110afdc5f6ca27
Author: Kotresh HR <khiremat>
Date:   Fri Mar 17 13:03:57 2017 -0400

    geo-rep: Optionally allow access to mounts
    
    In order to improve debuggability, it is important
    to have access to geo-rep master and slave mounts.
    With the default behaviour, geo-rep lazy unmounts
    the mounts after changing the current working
    directory into the mount point. It also cleans
    up the mount points. So only geo-rep worker has
    the access and it becomes impossible to take the
    client profile info and do any other client statck
    analysis. Hence the following new config is being
    introduced to allow access to mounts.
    
    gluster vol geo-rep <mastervol> <slavehost>::<slavevol> \
    config access_mount true
    
    The default value of 'access_mount' is false.
    
    Change-Id: I53dce4ea86a6ffc979c82f9330e8954327180ca3
    BUG: 1433506
    Signed-off-by: Kotresh HR <khiremat>
    Reviewed-on: https://review.gluster.org/16912
    Smoke: Gluster Build System <jenkins.org>
    NetBSD-regression: NetBSD Build System <jenkins.org>
    CentOS-regression: Gluster Build System <jenkins.org>
    Reviewed-by: Vijay Bellur <vbellur>