diff --git a/src/p1st/btrfs_receive_chunks_v3.py b/src/p1st/btrfs_receive_chunks_v3.py
index 8d5f3b1..0420b3d 100644
--- a/src/p1st/btrfs_receive_chunks_v3.py
+++ b/src/p1st/btrfs_receive_chunks_v3.py
@@ -5,7 +5,7 @@ import shlex
 from pathlib import Path
 from queue import Queue
 
-from p1st.common import Message1, Message2
+from p1st.common import Message1, Message2, get_chunk_path, get_inform1_path, get_inform2_path
 from p1st.exec_consume_chunks import execute_consume_chunks
 from p1st.repeat import repeat_until_successful
 
@@ -15,7 +15,7 @@ def main():
     #
     ssh_source: str = args.ssh_source
     source_chunk_dir: Path = args.source_chunk_dir
-    targe_chunk_dir: Path = args.chunk_dir
+    target_chunk_dir: Path = args.chunk_dir
     target_path: Path = args.target_path
 
     target_path.parent.mkdir(parents=True, exist_ok=True)
@@ -25,13 +25,13 @@ def main():
     def handle_chunks(queue_put: Queue.put):
         chunk_no = 1
         while True:
-            target_chunk_path = targe_chunk_dir.joinpath(f'{target_path.name}.CHUNK.{chunk_no}')
-            source_chunk_path = source_chunk_dir.joinpath(f'{target_path.name}.CHUNK.{chunk_no}')
-            in_socket: Path = source_chunk_dir.parent.joinpath(f'{target_path.name}.SOCKET.in')
+            target_chunk_path = get_chunk_path(target_chunk_dir, target_path, chunk_no)
+            source_chunk_path = get_chunk_path(source_chunk_dir, target_path, chunk_no)
+            in_socket: Path = get_inform2_path(source_chunk_dir, target_path)
 
-            usr_confirmation_socket = target_chunk_path.parent.joinpath(f'{target_chunk_path.name}.SOCKET')
+            user_socket = target_chunk_dir.parent.joinpath(f'{target_path.name}.SOCKET.user')
 
-            inform_path = source_chunk_path.parent.joinpath(f'{source_chunk_path.name}.COMPLETE')
+            inform_path = get_inform1_path(source_chunk_path)
             inform_cmd = ['ssh',
                           ssh_source,
                           f'cat {shlex.quote(str(inform_path))} && rm {shlex.quote(str(inform_path))}']
@@ -44,19 +44,19 @@ def main():
 
             # Wait until next chunk can be transferred from sending side.
             messages = [Message1.OK.value, Message1.EOF.value]
-            msg = repeat_until_successful(inform_cmd, usr_confirmation_socket)
+            msg = repeat_until_successful(inform_cmd, user_socket)
             if msg not in messages:
                 raise ValueError(f'Invalid message: {msg}')
             last_chunk = msg == Message1.EOF.value
 
             # Transfer chunk.
-            repeat_until_successful(rsync_cmd, usr_confirmation_socket)
+            repeat_until_successful(rsync_cmd, user_socket)
 
             # Add chunk path to queue.
             queue_put((target_chunk_path, last_chunk))
 
             # Inform sending side about successful transfer.
-            repeat_until_successful(inform2_cmd, usr_confirmation_socket)
+            repeat_until_successful(inform2_cmd, user_socket)
 
             if last_chunk:
                 break
diff --git a/src/p1st/btrfs_send_chunks_v3.py b/src/p1st/btrfs_send_chunks_v3.py
index 30ad8f3..2807c5e 100644
--- a/src/p1st/btrfs_send_chunks_v3.py
+++ b/src/p1st/btrfs_send_chunks_v3.py
@@ -4,7 +4,7 @@ import argparse
 import socket
 from pathlib import Path
 
-from p1st.common import Message1, Message2
+from p1st.common import Message1, Message2, get_inform1_path, get_inform2_path, get_chunk_path
 from p1st.exec_produce_chunks import execute_produce_chunks
 from p1st.unix_sock_input import accept_loop_until_message
 
@@ -29,20 +29,20 @@ def main():
     command = [x for xs in command_parts for x in xs]
 
     def get_source_chunk_path(chunk_no: int) -> Path:
-        return source_chunk_dir.joinpath(f'{child.name}.CHUNK.{chunk_no}')
+        return get_chunk_path(source_chunk_dir, child, chunk_no)
 
     def handle_chunk(chunk_no: int, last_chunk: bool):
         source_chunk_path = get_source_chunk_path(chunk_no)
         print(f'Handling chunk {source_chunk_path}')
 
         # Create in_socket
-        in_socket: Path = source_chunk_dir.parent.joinpath(f'{child.name}.SOCKET.in')
+        in_socket: Path = get_inform2_path(source_chunk_dir, child)
         in_sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
         in_sock.bind(str(in_socket))
         in_sock.listen(1)
 
         # Inform receiving side, that the next chunk can be transferred.
-        inform_path = source_chunk_path.parent.joinpath(f'{source_chunk_path.name}.COMPLETE')
+        inform_path = get_inform1_path(source_chunk_path)
         inform_path.write_text(Message1.EOF.value if last_chunk else Message1.OK.value)
 
         # Read from in_socket
diff --git a/src/p1st/common.py b/src/p1st/common.py
index ec80eba..8aa80b5 100644
--- a/src/p1st/common.py
+++ b/src/p1st/common.py
@@ -1,6 +1,7 @@
 #!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 from enum import Enum
+from pathlib import Path
 
 
 class Message1(Enum):
@@ -11,3 +12,15 @@ class Message1(Enum):
 class Message2(Enum):
     OK_BINARY = b'OK\n'
     OK_STR = 'OK\n'
+
+
+def get_chunk_path(chunk_dir: Path, subvolume: Path, chunk_no: int) -> Path:
+    return chunk_dir.joinpath(f'{subvolume.name}.CHUNK.{chunk_no}')
+
+
+def get_inform1_path(source_chunk_path: Path) -> Path:
+    return source_chunk_path.parent.joinpath(f'{source_chunk_path.name}.COMPLETE')
+
+
+def get_inform2_path(source_chunk_dir: Path, subvolume: Path) -> Path:
+    return source_chunk_dir.joinpath(f'{subvolume.name}.SOCKET.in')