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#!/usr/bin/python
#
# raid.py - raid probing control
#
# Erik Troan <ewt@redhat.com>
#
# Copyright 2001 Red Hat, Inc.
#
# This software may be freely redistributed under the terms of the GNU
# library public license.
#
# You should have received a copy of the GNU Library Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
#
# XXX partedify
import _balkan
import isys
import os
def scanForRaid(drives):
raidSets = {}
raidDevices = {}
for d in drives:
isys.makeDevInode(d, "/tmp/" + d)
try:
parts = _balkan.readTable('/tmp/' + d)
except SystemError, msg:
parts = []
os.remove("/tmp/" + d)
for i in range(0, len(parts)):
(type, start, size) = parts[i]
if type != _balkan.RAID: continue
dev = "%s%d" % (d, i + 1)
try:
(major, minor, raidSet, level, nrDisks, totalDisks, mdMinor) =\
isys.raidsb(dev)
except ValueError:
# bad magic, this can't be part of our raid set
continue
if raidSets.has_key(raidSet):
(knownLevel, knownDisks, knownMinor, knownDevices) = \
raidSets[raidSet]
if knownLevel != level or knownDisks != totalDisks or \
knownMinor != mdMinor:
# Raise hell
raise SystemError, ("raid set inconsistency for md%d: "
"all drives in this raid set do not "
"agree on raid parameters" % (mdMinor,))
knownDevices.append(dev)
raidSets[raidSet] = (knownLevel, knownDisks, knownMinor,
knownDevices)
else:
raidSets[raidSet] = (level, totalDisks, mdMinor, [dev,])
if raidDevices.has_key(mdMinor):
if (raidDevices[mdMinor] != raidSet):
raise SystemError, ("raid set inconsistency for md%d: "
"found members of multiple raid sets "
"that claim to be md%d"
% (mdMinor, mdMinor))
else:
raidDevices[mdMinor] = raidSet
raidList = []
for key in raidSets.keys():
(level, totalDisks, mdMinor, devices) = raidSets[key]
if len(devices) < totalDisks:
str = ("missing components of raid device md%d. The "
"raid device needs %d drives and only %d were found."
% (mdMinor, len(devices), totalDisks))
raise SystemError, str
raidList.append((mdMinor, devices))
return raidList
def startAllRaid(driveList):
mdList = []
for (mdDevice, deviceList) in scanForRaid(driveList):
devName = "md%d" % (mdDevice,)
isys.raidstart(devName, deviceList[0])
mdList.append(devName)
return mdList
def stopAllRaid(mdList):
for dev in mdList:
isys.raidstop(dev)
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