rbd.py: fix stripe_unit() and stripe_count()

These matched older versions of the functions, but would segfault
using the current versions.

backport: cuttlefish, bobtail
Signed-off-by: Josh Durgin <josh.durgin@inktank.com>

diff --git a/src/pybind/rbd.py b/src/pybind/rbd.py
index b59ff63ab056fbcf1b4df570e1970990b8e1bb0a..9d71738e7284fb0901b6fcb57167454ff9751940 100644 (file)
--- a/src/pybind/rbd.py
+++ b/src/pybind/rbd.py
@@ -734,15 +734,21 @@ written." % (self.name, ret, length))
         """
         Returns the stripe unit used for the image.
         """
-        ret = self.librbd.rbd_get_stripe_unit()
-        return ret.value
+        stripe_unit = c_uint64()
+        ret = self.librbd.rbd_get_stripe_unit(self.image, byref(stripe_unit))
+        if ret != 0:
+            raise make_ex(ret, 'error getting stripe unit for image' % (self.name))
+        return stripe_unit.value
 
     def stripe_count(self):
         """
         Returns the stripe count used for the image.
         """
-        ret = self.librbd.rbd_get_stripe_count()
-        return ret.value
+        stripe_count = c_uint64()
+        ret = self.librbd.rbd_get_stripe_count(self.image, byref(stripe_count))
+        if ret != 0:
+            raise make_ex(ret, 'error getting stripe count for image' % (self.name))
+        return stripe_count.value
 
     def flatten(self):
         """