geo-rep: Fix syncing of files with non-ascii filenames

Problem:
  Creation of files/directories with non-ascii names fails
  to sync to the slave. It crashes with below traceback on
  slave.
  ...
  File "/usr/lib/x86_64-linux-gnu/glusterfs/python/syncdaemon/repce.py", line 118, in worker
    res = getattr(self.obj, rmeth)(*in_data[2:])
  File "/usr/lib/x86_64-linux-gnu/glusterfs/python/syncdaemon/resource.py", line 709, in entry_ops
    [ESTALE, EINVAL, EBUSY])
  File "/usr/lib/x86_64-linux-gnu/glusterfs/python/syncdaemon/syncdutils.py", line 546, in errno_wrap
    return call(*arg)
  File "/usr/lib/x86_64-linux-gnu/glusterfs/python/syncdaemon/libcxattr.py", line 83, in lsetxattr
    cls.raise_oserr()
  File "/usr/lib/x86_64-linux-gnu/glusterfs/python/syncdaemon/libcxattr.py", line 38, in raise_oserr
    raise OSError(errn, os.strerror(errn))
  OSError: [Errno 12] Cannot allocate memory

Cause:
  The length calculation arguments passed to blob creation was done before encoding. Hence
  was failing in gfid-access layer.

Fix:
  It appears that the calculating lenght properly fixes this issue. But it will cause
  issues in other places in 'python2' and not in 'python3'. So encoding and decoding
  each required string to make geo-rep compatible with both 'python2' and 'python3'
  is a nightmare and is not fool proof. Hence kept 'python2' code as is with out
  encode/decode and applied encode/decode only to 'python3'

Added non-ascii filename tests to regression

Backport of:
 > Patch: https://review.gluster.org/21668
 > BUG: 1650893
 > Change-Id: I35cfaf848e07b1a0b5cb93c01b98b472f08271a6
 > Signed-off-by: Kotresh HR <khiremat@redhat.com>

fixes: bz#1648642
Change-Id: I35cfaf848e07b1a0b5cb93c01b98b472f08271a6
Signed-off-by: Kotresh HR <khiremat@redhat.com>

1 files changed, 8 insertions, 8 deletions

diff --git a/geo-replication/syncdaemon/libcxattr.py b/geo-replication/syncdaemon/libcxattr.py
index 7f3f6ce453a..c7d69d7eb2e 100644
--- a/geo-replication/syncdaemon/libcxattr.py
+++ b/geo-replication/syncdaemon/libcxattr.py
@@ -9,9 +9,9 @@
 #
 
 import os
-from ctypes import CDLL, create_string_buffer, get_errno
-import py2py3
-from py2py3 import bytearray_to_str
+from ctypes import CDLL, get_errno
+from py2py3 import bytearray_to_str, gr_create_string_buffer
+from py2py3 import gr_query_xattr, gr_lsetxattr, gr_lremovexattr
 
 
 class Xattr(object):
@@ -40,7 +40,7 @@ class Xattr(object):
     @classmethod
     def _query_xattr(cls, path, siz, syscall, *a):
         if siz:
-            buf = create_string_buffer(b'\0' * siz)
+            buf = gr_create_string_buffer(siz)
         else:
             buf = None
         ret = getattr(cls.libc, syscall)(*((path,) + a + (buf, siz)))
@@ -56,7 +56,7 @@ class Xattr(object):
 
     @classmethod
     def lgetxattr(cls, path, attr, siz=0):
-        return cls._query_xattr(path.encode(), siz, 'lgetxattr', attr.encode())
+        return gr_query_xattr(cls, path, siz, 'lgetxattr', attr)
 
     @classmethod
     def lgetxattr_buf(cls, path, attr):
@@ -70,7 +70,7 @@ class Xattr(object):
 
     @classmethod
     def llistxattr(cls, path, siz=0):
-        ret = cls._query_xattr(path.encode(), siz, 'llistxattr')
+        ret = gr_query_xattr(cls, path, siz, 'llistxattr')
         if isinstance(ret, str):
             ret = ret.strip('\0')
             ret = ret.split('\0') if ret else []
@@ -78,13 +78,13 @@ class Xattr(object):
 
     @classmethod
     def lsetxattr(cls, path, attr, val):
-        ret = cls.libc.lsetxattr(path.encode(), attr.encode(), val, len(val), 0)
+        ret = gr_lsetxattr(cls, path, attr, val)
         if ret == -1:
             cls.raise_oserr()
 
     @classmethod
     def lremovexattr(cls, path, attr):
-        ret = cls.libc.lremovexattr(path.encode(), attr.encode())
+        ret = gr_lremovexattr(cls, path, attr)
         if ret == -1:
             cls.raise_oserr()