From 924640705c05ba69e2ad2095920fc1d209d32b20 Mon Sep 17 00:00:00 2001
From: Anton Frolov <anfrolov@mirantis.com>
Date: Tue, 28 May 2013 19:34:41 +0400
Subject: [PATCH] Support for NFS shares with spaces in path.

Unescape share address string listed in nfs_shares_config so that
'x.y.z.w:/foo\040bar' would become 'x.y.z.w:/foo bar' to support
mounting shares with spaces in name.
Use stat command to get available and total space on device instead
of df since it's output is easier to parse.

Fixes: bug #1180984
Change-Id: I552aba91ca8db14130f854c739594a818186bbe2
---
 cinder/tests/test_nfs.py     | 51 +++++++++++++++++++++++++++++-------
 cinder/volume/drivers/nfs.py | 10 +++----
 2 files changed, 47 insertions(+), 14 deletions(-)

diff --git a/cinder/tests/test_nfs.py b/cinder/tests/test_nfs.py
index 3f967c6f2..b75319d4a 100644
--- a/cinder/tests/test_nfs.py
+++ b/cinder/tests/test_nfs.py
@@ -115,6 +115,8 @@ class NfsDriverTestCase(test.TestCase):
     TEST_LOCAL_PATH = '/mnt/nfs/volume-123'
     TEST_FILE_NAME = 'test.txt'
     TEST_SHARES_CONFIG_FILE = '/etc/cinder/test-shares.conf'
+    TEST_NFS_EXPORT_SPACES = 'nfs-host3:/export this'
+    TEST_MNT_POINT_SPACES = '/ 0 0 0 /foo'
 
     def setUp(self):
         super(NfsDriverTestCase, self).setUp()
@@ -261,12 +263,9 @@ class NfsDriverTestCase(test.TestCase):
         mox = self._mox
         drv = self._driver
 
-        df_total_size = 2620544
-        df_avail = 2129984
-        df_head = 'Filesystem 1K-blocks Used Available Use% Mounted on\n'
-        df_data = 'nfs-host:/export %d 996864 %d 41%% /mnt' % (df_total_size,
-                                                               df_avail)
-        df_output = df_head + df_data
+        stat_total_size = 2620544
+        stat_avail = 2129984
+        stat_output = '1 %d %d' % (stat_total_size, stat_avail)
 
         du_used = 490560
         du_output = '%d /mnt' % du_used
@@ -276,8 +275,9 @@ class NfsDriverTestCase(test.TestCase):
             AndReturn(self.TEST_MNT_POINT)
 
         mox.StubOutWithMock(drv, '_execute')
-        drv._execute('df', '-P', '-B', '1', self.TEST_MNT_POINT,
-                     run_as_root=True).AndReturn((df_output, None))
+        drv._execute('stat', '-f', '-c', '%S %b %a',
+                     self.TEST_MNT_POINT,
+                     run_as_root=True).AndReturn((stat_output, None))
 
         drv._execute('du', '-sb', '--apparent-size',
                      '--exclude', '*snapshot*',
@@ -286,11 +286,44 @@ class NfsDriverTestCase(test.TestCase):
 
         mox.ReplayAll()
 
-        self.assertEquals((df_total_size, df_avail, du_used),
+        self.assertEquals((stat_total_size, stat_avail, du_used),
                           drv._get_capacity_info(self.TEST_NFS_EXPORT1))
 
         mox.VerifyAll()
 
+    def test_get_capacity_info_for_share_and_mount_point_with_spaces(self):
+        """_get_capacity_info should calculate correct value."""
+        mox = self._mox
+        drv = self._driver
+
+        stat_total_size = 2620544
+        stat_avail = 2129984
+        stat_output = '1 %d %d' % (stat_total_size, stat_avail)
+
+        du_used = 490560
+        du_output = '%d /mnt' % du_used
+
+        mox.StubOutWithMock(drv, '_get_mount_point_for_share')
+        drv._get_mount_point_for_share(self.TEST_NFS_EXPORT_SPACES).\
+            AndReturn(self.TEST_MNT_POINT_SPACES)
+
+        mox.StubOutWithMock(drv, '_execute')
+        drv._execute('stat', '-f', '-c', '%S %b %a',
+                     self.TEST_MNT_POINT_SPACES,
+                     run_as_root=True).AndReturn((stat_output, None))
+
+        drv._execute('du', '-sb', '--apparent-size',
+                     '--exclude', '*snapshot*',
+                     self.TEST_MNT_POINT_SPACES,
+                     run_as_root=True).AndReturn((du_output, None))
+
+        mox.ReplayAll()
+
+        self.assertEquals((stat_total_size, stat_avail, du_used),
+                          drv._get_capacity_info(self.TEST_NFS_EXPORT_SPACES))
+
+        mox.VerifyAll()
+
     def test_load_shares_config(self):
         mox = self._mox
         drv = self._driver
diff --git a/cinder/volume/drivers/nfs.py b/cinder/volume/drivers/nfs.py
index a162a7d25..b6909168c 100644
--- a/cinder/volume/drivers/nfs.py
+++ b/cinder/volume/drivers/nfs.py
@@ -152,7 +152,7 @@ class RemoteFsDriver(driver.VolumeDriver):
             # results in share_info =
             #  [ 'address:/vol', '-o options=123,rw --other' ]
 
-            share_address = share_info[0].strip()
+            share_address = share_info[0].strip().decode('unicode_escape')
             share_opts = share_info[1].strip() if len(share_info) > 1 else None
 
             self.shares[share_address] = share_opts
@@ -384,11 +384,11 @@ class NfsDriver(RemoteFsDriver):
         """
         mount_point = self._get_mount_point_for_share(nfs_share)
 
-        df, _ = self._execute('df', '-P', '-B', '1', mount_point,
+        df, _ = self._execute('stat', '-f', '-c', '%S %b %a', mount_point,
                               run_as_root=True)
-        df = df.splitlines()[1]
-        total_available = float(df.split()[3])
-        total_size = float(df.split()[1])
+        block_size, blocks_total, blocks_avail = map(float, df.split())
+        total_available = block_size * blocks_avail
+        total_size = block_size * blocks_total
 
         du, _ = self._execute('du', '-sb', '--apparent-size', '--exclude',
                               '*snapshot*', mount_point, run_as_root=True)
-- 
2.45.2