update ceph source to reef 18.2.1

[ceph.git] / ceph / src / ceph-volume / ceph_volume / api / lvm.py

diff --git a/ceph/src/ceph-volume/ceph_volume/api/lvm.py b/ceph/src/ceph-volume/ceph_volume/api/lvm.py
index 16cbc08b26254fb59b623d675f497b1552f0582c..dcc4f18627218ce98b956752312a6f5189c359e4 100644 (file)
--- a/ceph/src/ceph-volume/ceph_volume/api/lvm.py
+++ b/ceph/src/ceph-volume/ceph_volume/api/lvm.py
@@ -6,6 +6,7 @@ set of utilities for interacting with LVM.
 import logging
 import os
 import uuid
+import re
 from itertools import repeat
 from math import floor
 from ceph_volume import process, util, conf
@@ -1209,3 +1210,39 @@ def get_lv_by_fullname(full_name):
     except ValueError:
         res_lv = None
     return res_lv
+
+def get_lv_path_from_mapper(mapper):
+    """
+    This functions translates a given mapper device under the format:
+    /dev/mapper/LV to the format /dev/VG/LV.
+    eg:
+    from:
+    /dev/mapper/ceph--c1a97e46--234c--46aa--a549--3ca1d1f356a9-osd--block--32e8e896--172e--4a38--a06a--3702598510ec
+    to:
+    /dev/ceph-c1a97e46-234c-46aa-a549-3ca1d1f356a9/osd-block-32e8e896-172e-4a38-a06a-3702598510ec
+    """
+    results = re.split(r'^\/dev\/mapper\/(.+\w)-(\w.+)', mapper)
+    results = list(filter(None, results))
+
+    if len(results) != 2:
+        return None
+
+    return f"/dev/{results[0].replace('--', '-')}/{results[1].replace('--', '-')}"
+
+def get_mapper_from_lv_path(lv_path):
+    """
+    This functions translates a given lv path under the format:
+    /dev/VG/LV to the format /dev/mapper/LV.
+    eg:
+    from:
+    /dev/ceph-c1a97e46-234c-46aa-a549-3ca1d1f356a9/osd-block-32e8e896-172e-4a38-a06a-3702598510ec
+    to:
+    /dev/mapper/ceph--c1a97e46--234c--46aa--a549--3ca1d1f356a9-osd--block--32e8e896--172e--4a38--a06a--3702598510ec
+    """
+    results = re.split(r'^\/dev\/(.+\w)-(\w.+)', lv_path)
+    results = list(filter(None, results))
+
+    if len(results) != 2:
+        return None
+
+    return f"/dev/mapper/{results[0].replace('-', '--')}/{results[1].replace('-', '--')}"