Meanwhile, our heros battle the elusive N-way multipaths, which reveal
themselves not in flat structures, but rather with arbitrary heirarchy and
ever-more complex combinations of weaponry proceeding them. The quixotic
mercenaries must build out their own defenses, making them even more
regular and more expressive to combat such Medusan foes.
---
storage/devicelibs/mpath.py | 26 +++++++++++++++++++++-----
1 files changed, 21 insertions(+), 5 deletions(-)
diff --git a/storage/devicelibs/mpath.py b/storage/devicelibs/mpath.py
index adb2644..ffec28c 100644
--- a/storage/devicelibs/mpath.py
+++ b/storage/devicelibs/mpath.py
@@ -1,3 +1,6 @@
+
+import re
+
from ..udev import *
import iutil
@@ -5,15 +8,23 @@ def parseMultipathOutput(output):
# this function parses output from "multipath -d", so we can use its
# logic for our topology.
# The input looks like:
- # create: mpathb (1ATA ST3120026AS 5M) undef ATA,ST3120026AS
+ # create: mpathc (1ATA ST3120026AS 5M) undef ATA,ST3120026AS
# size=112G features='0' hwhandler='0' wp=undef
# `-+- policy='round-robin 0' prio=1 status=undef
# `- 2:0:0:0 sda 8:0 undef ready running
- # create: mpatha (36006016092d21800703762872c60db11) undef DGC,RAID 5
+ # create: mpathb (36006016092d21800703762872c60db11) undef DGC,RAID 5
# size=10G features='1 queue_if_no_path' hwhandler='1 emc' wp=undef
# `-+- policy='round-robin 0' prio=2 status=undef
# |- 6:0:0:0 sdb 8:16 undef ready running
# `- 7:0:0:0 sdc 8:32 undef ready running
+ # create: mpatha (36001438005deb4710000500000270000) dm-0 HP,HSV400
+ # size=20G features='0' hwhandler='0' wp=rw
+ # |-+- policy='round-robin 0' prio=-1 status=active
+ # | |- 7:0:0:1 sda 8:0 active undef running
+ # | `- 7:0:1:1 sdb 8:16 active undef running
+ # `-+- policy='round-robin 0' prio=-1 status=enabled
+ # |- 7:0:2:1 sdc 8:32 active undef running
+ # `- 7:0:3:1 sdd 8:48 active undef running
#
# (In anaconda, the first one there won't be included because we blacklist
# "ATA" as a vendor.)
@@ -27,8 +38,13 @@ def parseMultipathOutput(output):
name = None
devices = []
+ policy = re.compile('^[|+` -]+policy')
+ device = re.compile('^[|+` -]+[0-9]+:[0-9]+:[0-9]+:[0-9]+ ([a-zA-Z!/]+)')
+
lines = output.split('\n')
for line in lines:
+ pmatch = policy.match(line)
+ dmatch = device.match(line)
lexemes = line.split()
if not lexemes:
break
@@ -40,10 +56,10 @@ def parseMultipathOutput(output):
name = lexemes[1]
elif lexemes[0].startswith('size='):
pass
- elif lexemes[0] == '`-+-':
+ elif pmatch:
pass
- elif lexemes[0] in ['|-','`-']:
- devices.append(lexemes[2].replace('!', '/'))
+ elif dmatch:
+ devices.append(dmatch.groups()[0].replace('!','/'))
if name and devices:
mpaths[name] = devices
--
1.7.0.1
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