Add get_volume_id() API

Change-Id: Ia4c378c5b1657bb4ec23c7057c7cbc49c1b31484
Signed-off-by: Prashanth Pai <ppai@redhat.com>

2 files changed, 24 insertions, 0 deletions

diff --git a/gluster/gfapi/api.py b/gluster/gfapi/api.py
index c440de6..971e98c 100644
--- a/gluster/gfapi/api.py
+++ b/gluster/gfapi/api.py
@@ -510,3 +510,8 @@ glfs_utimens = gfapi_prototype('glfs_utimens', ctypes.c_int,
                                ctypes.c_void_p,
                                ctypes.c_char_p,
                                ctypes.POINTER(Timespec))
+
+glfs_get_volumeid = gfapi_prototype('glfs_get_volumeid', ctypes.c_int,
+                                    ctypes.c_void_p,
+                                    ctypes.c_char_p,
+                                    ctypes.c_size_t)
diff --git a/gluster/gfapi/gfapi.py b/gluster/gfapi/gfapi.py
index d48aa06..c01d534 100644
--- a/gluster/gfapi/gfapi.py
+++ b/gluster/gfapi/gfapi.py
@@ -14,6 +14,7 @@ import math
 import time
 import stat
 import errno
+import uuid
 from collections import Iterator
 
 from gluster.gfapi import api
@@ -666,6 +667,7 @@ class Volume(object):
 
         self.host = host
         self.volname = volname
+        self.volid = None
         self.protocol = proto
         self.port = port
 
@@ -770,6 +772,23 @@ class Volume(object):
         self.log_level = log_level
 
     @validate_mount
+    def get_volume_id(self):
+        """
+        Returns the volume ID (of type uuid.UUID) for the currently mounted
+        volume.
+        """
+        if self.volid != None:
+            return self.volid
+        size = 16
+        buf = ctypes.create_string_buffer(size)
+        ret = api.glfs_get_volumeid(self.fs, buf, size)
+        if ret < 0:
+            err = ctypes.get_errno()
+            raise OSError(err, os.strerror(err))
+        self.volid = uuid.UUID(bytes=buf.raw)
+        return self.volid
+
+    @validate_mount
     def access(self, path, mode):
         """
         Use the real uid/gid to test for access to path.