qa, test: run unit tests for cephfs.pyx with non-root user

Run test_python.sh with non-root user. This makes it necessary to change
the owner user and group of file system root to be same as this non-root
user. This brings testing closer to the real-world scenario and also
allows exercising negative tests where an FS op would fail for a non-root
user but it would pass for root user.

There are few tests that exercise FS operations where root user is
needed. Group these tests under a separate class and add extra code for
this class that allows these tests to run with root UID and GID.

Signed-off-by: Rishabh Dave <ridave@redhat.com>

diff --git a/qa/workunits/fs/test_python.sh b/qa/workunits/fs/test_python.sh
index 6e39b95a4d186d9a54a14531b5c31a8c55ac90d9..462c096b8f0f8182c7202b0a6046097c17fd78ef 100755 (executable)
--- a/qa/workunits/fs/test_python.sh
+++ b/qa/workunits/fs/test_python.sh
@@ -1,6 +1,4 @@
 #!/bin/sh -ex
 
-# Running as root because the filesystem root directory will be
-# owned by uid 0, and that's where we're writing.
-sudo python3 -m pytest -v $(dirname $0)/../../../src/test/pybind/test_cephfs.py
+python3 -m pytest -v $(dirname $0)/../../../src/test/pybind/test_cephfs.py
 exit 0

diff --git a/src/test/pybind/test_cephfs.py b/src/test/pybind/test_cephfs.py
index 052df462d0e45b64db61433c4a53142da78042d2..26de6577415d0dd6a652ac8d24aa5ee832ab80ca 100644 (file)
--- a/src/test/pybind/test_cephfs.py
+++ b/src/test/pybind/test_cephfs.py
@@ -12,14 +12,27 @@ import stat
 import uuid
 import json
 from datetime import datetime
+from subprocess import getoutput as get_cmd_output
+
 
 cephfs = None
 
+
 def setup_module():
     global cephfs
     cephfs = libcephfs.LibCephFS(conffile='')
+
+    username = get_cmd_output('id -un')
+    uid = get_cmd_output(f'id -u {username}')
+    gid = get_cmd_output(f'id -g {username}')
+    cephfs.conf_set('client_mount_uid', uid)
+    cephfs.conf_set('client_mount_gid', gid)
     cephfs.mount()
 
+    cephfs.conf_set('client_permissions' , 'false')
+    cephfs.chown('/', int(uid), int(gid))
+    cephfs.conf_set('client_permissions' , 'true')
+
 def teardown_module():
     global cephfs
     cephfs.shutdown()
@@ -569,142 +582,6 @@ def test_fchmod(testdir):
     cephfs.close(fd)
     cephfs.unlink(b'/file-fchmod')
 
-def test_chown(testdir):
-    fd = cephfs.open('file1', 'w', 0o755)
-    cephfs.write(fd, b'abcd', 0)
-    cephfs.close(fd)
-
-    uid = 1012
-    gid = 1012
-    cephfs.chown('file1', uid, gid)
-    st = cephfs.stat(b'/file1')
-    assert_equal(st.st_uid, uid)
-    assert_equal(st.st_gid, gid)
-
-def test_chown_change_uid_but_not_gid(testdir):
-    fd = cephfs.open('file1', 'w', 0o755)
-    cephfs.write(fd, b'abcd', 0)
-    cephfs.close(fd)
-
-    st1 = cephfs.stat(b'/file1')
-
-    uid = 1012
-    cephfs.chown('file1', uid, -1)
-    st2 = cephfs.stat(b'/file1')
-    assert_equal(st2.st_uid, uid)
-
-    # ensure that gid is unchaged.
-    assert_equal(st1.st_gid, st2.st_gid)
-
-def test_chown_change_gid_but_not_uid(testdir):
-    fd = cephfs.open('file1', 'w', 0o755)
-    cephfs.write(fd, b'abcd', 0)
-    cephfs.close(fd)
-
-    st1 = cephfs.stat(b'/file1')
-
-    gid = 1012
-    cephfs.chown('file1', -1, gid)
-    st2 = cephfs.stat(b'/file1')
-    assert_equal(st2.st_gid, gid)
-
-    # ensure that uid is unchaged.
-    assert_equal(st1.st_uid, st2.st_uid)
-
-def test_lchown(testdir):
-    fd = cephfs.open('file1', 'w', 0o755)
-    cephfs.write(fd, b'abcd', 0)
-    cephfs.close(fd)
-    cephfs.symlink('file1', 'slink1')
-
-    uid = 1012
-    gid = 1012
-    cephfs.lchown('slink1', uid, gid)
-    st = cephfs.lstat(b'/slink1')
-    assert_equal(st.st_uid, uid)
-    assert_equal(st.st_gid, gid)
-
-def test_lchown_change_uid_but_not_gid(testdir):
-    fd = cephfs.open('file1', 'w', 0o755)
-    cephfs.write(fd, b'abcd', 0)
-    cephfs.close(fd)
-    cephfs.symlink('file1', 'slink1')
-
-    st1 = cephfs.lstat(b'slink1')
-
-    uid = 1012
-    cephfs.lchown('slink1', uid, -1)
-    st2 = cephfs.lstat(b'/slink1')
-    assert_equal(st2.st_uid, uid)
-
-    # ensure that gid is unchaged.
-    assert_equal(st1.st_gid, st2.st_gid)
-
-def test_lchown_change_gid_but_not_uid(testdir):
-    fd = cephfs.open('file1', 'w', 0o755)
-    cephfs.write(fd, b'abcd', 0)
-    cephfs.close(fd)
-    cephfs.symlink('file1', 'slink1')
-
-    st1 = cephfs.lstat(b'slink1')
-
-    gid = 1012
-    cephfs.lchown('slink1', -1, gid)
-    st2 = cephfs.lstat(b'/slink1')
-    assert_equal(st2.st_gid, gid)
-
-    # ensure that uid is unchaged.
-    assert_equal(st1.st_uid, st2.st_uid)
-
-def test_fchown(testdir):
-    fd = cephfs.open(b'/file-fchown', 'w', 0o655)
-    uid = os.getuid()
-    gid = os.getgid()
-    assert_raises(TypeError, cephfs.fchown, b'/file-fchown', uid, gid)
-    assert_raises(TypeError, cephfs.fchown, fd, "uid", "gid")
-    cephfs.fchown(fd, uid, gid)
-    st = cephfs.statx(b'/file-fchown', libcephfs.CEPH_STATX_UID | libcephfs.CEPH_STATX_GID, 0)
-    assert_equal(st["uid"], uid)
-    assert_equal(st["gid"], gid)
-    cephfs.fchown(fd, 9999, 9999)
-    st = cephfs.statx(b'/file-fchown', libcephfs.CEPH_STATX_UID | libcephfs.CEPH_STATX_GID, 0)
-    assert_equal(st["uid"], 9999)
-    assert_equal(st["gid"], 9999)
-    cephfs.close(fd)
-    cephfs.unlink(b'/file-fchown')
-
-def test_fchown_change_uid_but_not_gid(testdir):
-    fd = cephfs.open('file1', 'w', 0o755)
-    cephfs.write(fd, b'abcd', 0)
-
-    st1 = cephfs.stat(b'/file1')
-
-    uid = 1012
-    cephfs.fchown(fd, uid, -1)
-    st2 = cephfs.stat(b'/file1')
-    assert_equal(st2.st_uid, uid)
-
-    # ensure that uid is unchanged.
-    assert_equal(st1.st_gid, st2.st_gid)
-
-    cephfs.close(fd)
-
-def test_fchown_change_gid_but_not_uid(testdir):
-    fd = cephfs.open('file1', 'w', 0o755)
-    cephfs.write(fd, b'abcd', 0)
-
-    st1 = cephfs.stat(b'/file1')
-
-    gid = 1012
-    cephfs.chown('file1', -1, gid)
-    st2 = cephfs.stat(b'/file1')
-    assert_equal(st2.st_gid, gid)
-
-    # ensure that gid is unchanged.
-    assert_equal(st1.st_uid, st2.st_uid)
-
-    cephfs.close(fd)
-
 def test_truncate(testdir):
     fd = cephfs.open(b'/file-truncate', 'w', 0o755)
     cephfs.write(fd, b"1111", 0)
@@ -840,80 +717,6 @@ def test_preadv_pwritev():
     cephfs.close(fd)
     cephfs.unlink(b'file-1')
 
-def test_setattrx(testdir):
-    fd = cephfs.open(b'file-setattrx', 'w', 0o655)
-    cephfs.write(fd, b"1111", 0)
-    cephfs.close(fd)
-    st = cephfs.statx(b'file-setattrx', libcephfs.CEPH_STATX_MODE, 0)
-    mode = st["mode"] | stat.S_IXUSR
-    assert_raises(TypeError, cephfs.setattrx, b'file-setattrx', "dict", 0, 0)
-
-    time.sleep(1)
-    statx_dict = dict()
-    statx_dict["mode"] = mode
-    statx_dict["uid"] = 9999
-    statx_dict["gid"] = 9999
-    dt = datetime.now()
-    statx_dict["mtime"] = dt
-    statx_dict["atime"] = dt
-    statx_dict["ctime"] = dt
-    statx_dict["size"] = 10
-    statx_dict["btime"] = dt
-    cephfs.setattrx(b'file-setattrx', statx_dict, libcephfs.CEPH_SETATTR_MODE | libcephfs.CEPH_SETATTR_UID |
-                                                  libcephfs.CEPH_SETATTR_GID | libcephfs.CEPH_SETATTR_MTIME |
-                                                  libcephfs.CEPH_SETATTR_ATIME | libcephfs.CEPH_SETATTR_CTIME |
-                                                  libcephfs.CEPH_SETATTR_SIZE | libcephfs.CEPH_SETATTR_BTIME, 0)
-    st1 = cephfs.statx(b'file-setattrx', libcephfs.CEPH_STATX_MODE | libcephfs.CEPH_STATX_UID |
-                                         libcephfs.CEPH_STATX_GID | libcephfs.CEPH_STATX_MTIME |
-                                         libcephfs.CEPH_STATX_ATIME | libcephfs.CEPH_STATX_CTIME |
-                                         libcephfs.CEPH_STATX_SIZE | libcephfs.CEPH_STATX_BTIME, 0)
-    assert_equal(mode, st1["mode"])
-    assert_equal(9999, st1["uid"])
-    assert_equal(9999, st1["gid"])
-    assert_equal(int(dt.timestamp()), int(st1["mtime"].timestamp()))
-    assert_equal(int(dt.timestamp()), int(st1["atime"].timestamp()))
-    assert_equal(int(dt.timestamp()), int(st1["ctime"].timestamp()))
-    assert_equal(int(dt.timestamp()), int(st1["btime"].timestamp()))
-    assert_equal(10, st1["size"])
-    cephfs.unlink(b'file-setattrx')
-
-def test_fsetattrx(testdir):
-    fd = cephfs.open(b'file-fsetattrx', 'w', 0o655)
-    cephfs.write(fd, b"1111", 0)
-    st = cephfs.statx(b'file-fsetattrx', libcephfs.CEPH_STATX_MODE, 0)
-    mode = st["mode"] | stat.S_IXUSR
-    assert_raises(TypeError, cephfs.fsetattrx, fd, "dict", 0, 0)
-
-    time.sleep(1)
-    statx_dict = dict()
-    statx_dict["mode"] = mode
-    statx_dict["uid"] = 9999
-    statx_dict["gid"] = 9999
-    dt = datetime.now()
-    statx_dict["mtime"] = dt
-    statx_dict["atime"] = dt
-    statx_dict["ctime"] = dt
-    statx_dict["size"] = 10
-    statx_dict["btime"] = dt
-    cephfs.fsetattrx(fd, statx_dict, libcephfs.CEPH_SETATTR_MODE | libcephfs.CEPH_SETATTR_UID |
-                                                  libcephfs.CEPH_SETATTR_GID | libcephfs.CEPH_SETATTR_MTIME |
-                                                  libcephfs.CEPH_SETATTR_ATIME | libcephfs.CEPH_SETATTR_CTIME |
-                                                  libcephfs.CEPH_SETATTR_SIZE | libcephfs.CEPH_SETATTR_BTIME)
-    st1 = cephfs.statx(b'file-fsetattrx', libcephfs.CEPH_STATX_MODE | libcephfs.CEPH_STATX_UID |
-                                         libcephfs.CEPH_STATX_GID | libcephfs.CEPH_STATX_MTIME |
-                                         libcephfs.CEPH_STATX_ATIME | libcephfs.CEPH_STATX_CTIME |
-                                         libcephfs.CEPH_STATX_SIZE | libcephfs.CEPH_STATX_BTIME, 0)
-    assert_equal(mode, st1["mode"])
-    assert_equal(9999, st1["uid"])
-    assert_equal(9999, st1["gid"])
-    assert_equal(int(dt.timestamp()), int(st1["mtime"].timestamp()))
-    assert_equal(int(dt.timestamp()), int(st1["atime"].timestamp()))
-    assert_equal(int(dt.timestamp()), int(st1["ctime"].timestamp()))
-    assert_equal(int(dt.timestamp()), int(st1["btime"].timestamp()))
-    assert_equal(10, st1["size"])
-    cephfs.close(fd)
-    cephfs.unlink(b'file-fsetattrx')
-
 def test_get_layout(testdir):
     fd = cephfs.open(b'file-get-layout', 'w', 0o755)
     cephfs.write(fd, b"1111", 0)
@@ -1061,6 +864,260 @@ def test_multi_target_command():
             assert(list(mds_sessions.keys())[0].startswith('mds.'))
 
 
+class TestWithRootUser:
+
+    def setup_method(self):
+        cephfs.unmount()
+        cephfs.conf_set('client_mount_uid', '0')
+        cephfs.conf_set('client_mount_gid', '0')
+        cephfs.mount()
+
+        cephfs.conf_set('client_permissions' , 'false')
+        cephfs.chown('/', 0, 0)
+        cephfs.conf_set('client_permissions' , 'true')
+
+    def teardown_method(self):
+        cephfs.unmount()
+
+        username = get_cmd_output('id -un')
+        uid = get_cmd_output(f'id -u {username}')
+        gid = get_cmd_output(f'id -g {username}')
+
+        cephfs.conf_set('client_mount_uid', uid)
+        cephfs.conf_set('client_mount_gid', gid)
+        cephfs.mount()
+
+        cephfs.conf_set('client_permissions' , 'false')
+        cephfs.chown('/', int(uid), int(gid))
+        cephfs.conf_set('client_permissions' , 'true')
+
+    def test_chown(testdir):
+        fd = cephfs.open('file1', 'w', 0o755)
+        cephfs.write(fd, b'abcd', 0)
+        cephfs.close(fd)
+
+        uid = 1012
+        gid = 1012
+        cephfs.chown('file1', uid, gid)
+        st = cephfs.stat(b'/file1')
+        assert_equal(st.st_uid, uid)
+        assert_equal(st.st_gid, gid)
+
+    def test_chown_change_uid_but_not_gid(testdir):
+        fd = cephfs.open('file1', 'w', 0o755)
+        cephfs.write(fd, b'abcd', 0)
+        cephfs.close(fd)
+
+        st1 = cephfs.stat(b'/file1')
+
+        uid = 1012
+        cephfs.chown('file1', uid, -1)
+        st2 = cephfs.stat(b'/file1')
+        assert_equal(st2.st_uid, uid)
+
+        # ensure that gid is unchaged.
+        assert_equal(st1.st_gid, st2.st_gid)
+
+    def test_chown_change_gid_but_not_uid(testdir):
+        fd = cephfs.open('file1', 'w', 0o755)
+        cephfs.write(fd, b'abcd', 0)
+        cephfs.close(fd)
+
+        st1 = cephfs.stat(b'/file1')
+
+        gid = 1012
+        cephfs.chown('file1', -1, gid)
+        st2 = cephfs.stat(b'/file1')
+        assert_equal(st2.st_gid, gid)
+
+        # ensure that uid is unchaged.
+        assert_equal(st1.st_uid, st2.st_uid)
+
+    def test_lchown(testdir):
+        fd = cephfs.open('file1', 'w', 0o755)
+        cephfs.write(fd, b'abcd', 0)
+        cephfs.close(fd)
+        cephfs.symlink('file1', 'slink1')
+
+        uid = 1012
+        gid = 1012
+        cephfs.lchown('slink1', uid, gid)
+        st = cephfs.lstat(b'/slink1')
+        assert_equal(st.st_uid, uid)
+        assert_equal(st.st_gid, gid)
+
+    def test_lchown_change_uid_but_not_gid(testdir):
+        fd = cephfs.open('file2', 'w', 0o755)
+        cephfs.write(fd, b'abcd', 0)
+        cephfs.close(fd)
+        cephfs.symlink('file2', 'slink2')
+
+        st1 = cephfs.lstat(b'slink2')
+
+        uid = 1012
+        cephfs.lchown('slink2', uid, -1)
+        st2 = cephfs.lstat(b'/slink2')
+        assert_equal(st2.st_uid, uid)
+
+        # ensure that gid is unchaged.
+        assert_equal(st1.st_gid, st2.st_gid)
+
+    def test_lchown_change_gid_but_not_uid(testdir):
+        fd = cephfs.open('file3', 'w', 0o755)
+        cephfs.write(fd, b'abcd', 0)
+        cephfs.close(fd)
+        cephfs.symlink('file3', 'slink3')
+
+        st1 = cephfs.lstat(b'slink3')
+
+        gid = 1012
+        cephfs.lchown('slink3', -1, gid)
+        st2 = cephfs.lstat(b'/slink3')
+        assert_equal(st2.st_gid, gid)
+
+        # ensure that uid is unchaged.
+        assert_equal(st1.st_uid, st2.st_uid)
+
+    def test_fchown(testdir):
+        fd = cephfs.open(b'/file-fchown', 'w', 0o655)
+        uid = os.getuid()
+        gid = os.getgid()
+        assert_raises(TypeError, cephfs.fchown, b'/file-fchown', uid, gid)
+        assert_raises(TypeError, cephfs.fchown, fd, "uid", "gid")
+        cephfs.fchown(fd, uid, gid)
+        st = cephfs.statx(b'/file-fchown', libcephfs.CEPH_STATX_UID | libcephfs.CEPH_STATX_GID, 0)
+        assert_equal(st["uid"], uid)
+        assert_equal(st["gid"], gid)
+        cephfs.fchown(fd, 9999, 9999)
+        st = cephfs.statx(b'/file-fchown', libcephfs.CEPH_STATX_UID | libcephfs.CEPH_STATX_GID, 0)
+        assert_equal(st["uid"], 9999)
+        assert_equal(st["gid"], 9999)
+        cephfs.close(fd)
+        cephfs.unlink(b'/file-fchown')
+
+    def test_fchown_change_uid_but_not_gid(testdir):
+        fd = cephfs.open('file1', 'w', 0o755)
+        cephfs.write(fd, b'abcd', 0)
+
+        st1 = cephfs.stat(b'/file1')
+
+        uid = 1012
+        cephfs.fchown(fd, uid, -1)
+        st2 = cephfs.stat(b'/file1')
+        assert_equal(st2.st_uid, uid)
+
+        # ensure that uid is unchanged.
+        assert_equal(st1.st_gid, st2.st_gid)
+
+        cephfs.close(fd)
+
+    def test_fchown_change_gid_but_not_uid(testdir):
+        fd = cephfs.open('file1', 'w', 0o755)
+        cephfs.write(fd, b'abcd', 0)
+
+        st1 = cephfs.stat(b'/file1')
+
+        gid = 1012
+        cephfs.chown('file1', -1, gid)
+        st2 = cephfs.stat(b'/file1')
+        assert_equal(st2.st_gid, gid)
+
+        # ensure that gid is unchanged.
+        assert_equal(st1.st_uid, st2.st_uid)
+
+        cephfs.close(fd)
+
+    def test_setattrx(testdir):
+        fd = cephfs.open(b'file-setattrx', 'w', 0o655)
+        cephfs.write(fd, b"1111", 0)
+        cephfs.close(fd)
+        st = cephfs.statx(b'file-setattrx', libcephfs.CEPH_STATX_MODE, 0)
+        mode = st["mode"] | stat.S_IXUSR
+        assert_raises(TypeError, cephfs.setattrx, b'file-setattrx', "dict", 0, 0)
+
+        time.sleep(1)
+        statx_dict = dict()
+        statx_dict["mode"] = mode
+        statx_dict["uid"] = 9999
+        statx_dict["gid"] = 9999
+        dt = datetime.now()
+        statx_dict["mtime"] = dt
+        statx_dict["atime"] = dt
+        statx_dict["ctime"] = dt
+        statx_dict["size"] = 10
+        statx_dict["btime"] = dt
+        cephfs.setattrx(b'file-setattrx', statx_dict, libcephfs.CEPH_SETATTR_MODE |
+                                                      libcephfs.CEPH_SETATTR_UID |
+                                                      libcephfs.CEPH_SETATTR_GID |
+                                                      libcephfs.CEPH_SETATTR_MTIME |
+                                                      libcephfs.CEPH_SETATTR_ATIME |
+                                                      libcephfs.CEPH_SETATTR_CTIME |
+                                                      libcephfs.CEPH_SETATTR_SIZE |
+                                                      libcephfs.CEPH_SETATTR_BTIME, 0)
+        st1 = cephfs.statx(b'file-setattrx', libcephfs.CEPH_STATX_MODE |
+                                             libcephfs.CEPH_STATX_UID |
+                                             libcephfs.CEPH_STATX_GID |
+                                             libcephfs.CEPH_STATX_MTIME |
+                                             libcephfs.CEPH_STATX_ATIME |
+                                             libcephfs.CEPH_STATX_CTIME |
+                                             libcephfs.CEPH_STATX_SIZE |
+                                             libcephfs.CEPH_STATX_BTIME, 0)
+        assert_equal(mode, st1["mode"])
+        assert_equal(9999, st1["uid"])
+        assert_equal(9999, st1["gid"])
+        assert_equal(int(dt.timestamp()), int(st1["mtime"].timestamp()))
+        assert_equal(int(dt.timestamp()), int(st1["atime"].timestamp()))
+        assert_equal(int(dt.timestamp()), int(st1["ctime"].timestamp()))
+        assert_equal(int(dt.timestamp()), int(st1["btime"].timestamp()))
+        assert_equal(10, st1["size"])
+        cephfs.unlink(b'file-setattrx')
+
+    def test_fsetattrx(testdir):
+        fd = cephfs.open(b'file-fsetattrx', 'w', 0o655)
+        cephfs.write(fd, b"1111", 0)
+        st = cephfs.statx(b'file-fsetattrx', libcephfs.CEPH_STATX_MODE, 0)
+        mode = st["mode"] | stat.S_IXUSR
+        assert_raises(TypeError, cephfs.fsetattrx, fd, "dict", 0, 0)
+
+        time.sleep(1)
+        statx_dict = dict()
+        statx_dict["mode"] = mode
+        statx_dict["uid"] = 9999
+        statx_dict["gid"] = 9999
+        dt = datetime.now()
+        statx_dict["mtime"] = dt
+        statx_dict["atime"] = dt
+        statx_dict["ctime"] = dt
+        statx_dict["size"] = 10
+        statx_dict["btime"] = dt
+        cephfs.fsetattrx(fd, statx_dict, libcephfs.CEPH_SETATTR_MODE |
+                                         libcephfs.CEPH_SETATTR_UID |
+                                         libcephfs.CEPH_SETATTR_GID |
+                                         libcephfs.CEPH_SETATTR_MTIME |
+                                         libcephfs.CEPH_SETATTR_ATIME |
+                                         libcephfs.CEPH_SETATTR_CTIME |
+                                         libcephfs.CEPH_SETATTR_SIZE |
+                                         libcephfs.CEPH_SETATTR_BTIME)
+        st1 = cephfs.statx(b'file-fsetattrx', libcephfs.CEPH_STATX_MODE |
+                                              libcephfs.CEPH_STATX_UID |
+                                              libcephfs.CEPH_STATX_GID |
+                                              libcephfs.CEPH_STATX_MTIME |
+                                              libcephfs.CEPH_STATX_ATIME |
+                                              libcephfs.CEPH_STATX_CTIME |
+                                              libcephfs.CEPH_STATX_SIZE |
+                                              libcephfs.CEPH_STATX_BTIME, 0)
+        assert_equal(mode, st1["mode"])
+        assert_equal(9999, st1["uid"])
+        assert_equal(9999, st1["gid"])
+        assert_equal(int(dt.timestamp()), int(st1["mtime"].timestamp()))
+        assert_equal(int(dt.timestamp()), int(st1["atime"].timestamp()))
+        assert_equal(int(dt.timestamp()), int(st1["ctime"].timestamp()))
+        assert_equal(int(dt.timestamp()), int(st1["btime"].timestamp()))
+        assert_equal(10, st1["size"])
+        cephfs.close(fd)
+        cephfs.unlink(b'file-fsetattrx')
+
+
 class TestRmtree:
     '''
     Test rmtree() method of CephFS python bindings.