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@redhat.com>
Reviewed-on: https://review.gluster.org/16912
Smoke: Gluster Build System <jenkins@build.gluster.org>
NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
CentOS-regression: Gluster Build System <jenkins@build.gluster.org>
Reviewed-by: Vijay Bellur <vbellur@redhat.com>

1 files changed, 11 insertions, 1 deletions

diff --git a/geo-replication/syncdaemon/syncdutils.py b/geo-replication/syncdaemon/syncdutils.py
index 292cd0aea19..4d981f9fe53 100644
--- a/geo-replication/syncdaemon/syncdutils.py
+++ b/geo-replication/syncdaemon/syncdutils.py
@@ -16,6 +16,7 @@ import fcntl
 import shutil
 import logging
 import socket
+import subprocess
 from threading import Lock, Thread as baseThread
 from errno import EACCES, EAGAIN, EPIPE, ENOTCONN, ECONNABORTED
 from errno import EINTR, ENOENT, EPERM, ESTALE, errorcode
@@ -189,12 +190,13 @@ def grabpidfile(fname=None, setpid=True):
 
 final_lock = Lock()
 
-
+mntpt_list = []
 def finalize(*a, **kw):
     """all those messy final steps we go trough upon termination
 
     Do away with pidfile, ssh control dir and logging.
     """
+
     final_lock.acquire()
     if getattr(gconf, 'pid_file', None):
         rm_pidf = gconf.pid_file_owned
@@ -234,6 +236,13 @@ def finalize(*a, **kw):
             if sys.exc_info()[0] == OSError:
                 pass
 
+    """ Unmount if not done """
+    for mnt in mntpt_list:
+        p0 = subprocess.Popen (["umount", "-l", mnt], stderr=subprocess.PIPE)
+        _, errdata = p0.communicate()
+        if p0.returncode == 0:
+            os.rmdir(mnt)
+
     if gconf.log_exit:
         logging.info("exiting.")
     sys.stdout.flush()
@@ -241,6 +250,7 @@ def finalize(*a, **kw):
     os._exit(kw.get('exval', 0))
 
 
+
 def log_raise_exception(excont):
     """top-level exception handler