We need to find out about multipath topology from /sbin/multipath, which
unfortunately needs some parsing - it's fairly easy, though.
---
storage/devicelibs/mpath.py | 32 ++++++++++++++++++++++++++++++++
1 files changed, 32 insertions(+), 0 deletions(-)
diff --git a/storage/devicelibs/mpath.py b/storage/devicelibs/mpath.py
index 733437d..4d1b262 100644
--- a/storage/devicelibs/mpath.py
+++ b/storage/devicelibs/mpath.py
@@ -1,5 +1,37 @@
from ..udev import *
+def parseMultipathOutput(output):
+ # this function parses output from "multipath -d", so we can use its
+ # logic for our topology. It returns a structure like:
+ # [ {'mpathb':['sdb','sdc']}, ... ]
+ mpaths = {}
+
+ name = None
+ devices = []
+
+ lines = output.split('\n')
+ for line in lines:
+ lexemes = line.split()
+ if not lexemes:
+ break
+ if lexemes[0] == 'create:':
+ if name and devices:
+ mpaths.append(mpath)
+ name = None
+ devices = []
+ name = lexemes[1]
+ elif lexemes[0].startswith('size='):
+ pass
+ elif lexemes[0] == '`-+-':
+ pass
+ elif lexemes[0] in ['|-','`-']:
+ devices.append(lexemes[2])
+
+ if name and devices:
+ mpaths[name] = devices
+
+ return mpaths
+
def identifyMultipaths(devices):
# this function does a couple of things
# 1) identifies multipath disks
--
1.6.5.2
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