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#!/usr/bin/python
#
# dmraid.py - dmraid probing control
#
# Peter Jones <pjones@redhat.com>
#
# Copyright 2005 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.
#
"""DMRaid probing control."""
# XXX dmraid and md raid should be abstracted from the same thing. -pj
# XXX dmraid and lvm should use a common control mechanism (such as block.dm)
# for device-mapper. -pj
import sys
import block
import parted
import logging
#log = logging.getLogger("anaconda")
log = logging
import isys
# these arches can have their /boot on DMRAID and not have their
# boot loader blow up
# XXX This needs to be functional so it can test if drives sit on particular
# controlers. -pj
dmraidBootArches = [ "i386", "x86_64" ]
def getRaidSetDisks(rs, descend=False):
"""Builds a list of disks used by a dmraid set
rs is a block.dmraid.raidset instance
Returns a list of parted.PedDevice instances.
"""
if not isinstance(rs, block.dmraid.raidset):
raise TypeError, "getRaidSetInfo needs raidset, got %s" % (rs.__type__,)
devs = []
for c in rs.children:
if isinstance(c, block.dmraid.raiddev):
dev = parted.PedDevice.get(c.device.path)
devs.append(dev)
elif descend and isinstance(c, block.dmraid.raidset):
devs += getRaidSetDisks(c)
return devs
# This is a placeholder, because "spares" isn't implemented in
# block.dmraid.raidset yet; once dmraid has support for SNIA DDF or
# fake raid 5, I'll add it. -pj
def getRaidSetSpareDisks(rs, descend=False):
"""Builds a list of disks used as spares by a dmraid set
rs is a block.dmraid.raidset instance
Returns a list of parted.PedDevice instances.
"""
if not isinstance(rs, block.dmraid.raidset):
raise TypeError, "getRaidSetInfo needs raidset, got %s" % (rs.__type__,)
devs = []
if hasattr(rs, 'spares'):
for c in rs.spares:
if isinstance(c, block.dmraid.raiddev):
dev = parted.PedDevice.get(c.device.path)
devs.append(dev)
elif descend and isinstance(c, block.dmraid.raidset):
devs += getRaidSetSpareDisks(c, descend)
# children might have spares, too.
for c in rs.children:
if descend and isinstance(c, block.dmraid.raidset):
devs += getRaidSetSpareDisks(c, descend)
return devs
def getRaidSetInfo(rs):
"""Builds information about a dmraid set
rs is a block.dmraid.raidset instance
Returns a list of tuples for this raidset and its
dependencies, in sorted order, of the form
(raidSet, parentRaidSet, devices, level, nrDisks, totalDisks)
"""
if not isinstance(rs, block.dmraid.raidset):
raise TypeError, "getRaidSetInfo needs raidset, got %s" % (rs.__type__,)
sets = []
for c in rs.children:
if isinstance(c, block.dmraid.raidset):
infos = getRaidSetInfo(c)
for info in infos:
if info[1] is None:
info[1] = rs
sets += infos
try:
parent = None
devs = getRaidSetDisks(rs)
sparedevs = getRaidSetSpareDisks(rs)
totalDisks = len(devs) + len(sparedevs)
nrDisks = len(devs)
devices = devs + sparedevs
# XXX missing some types here -pj
dmtype2level = { 'stripe': 0, 'mirror': 1, }
level = dmtype2level[rs.dmtype]
sets.append((rs, parent, devices, level, nrDisks, totalDisks))
except:
# something went haywire
log.error("Exception occurred reading info for %s: %s" % \
(repr(rs), (sys.exc_type, ))) # XXX PJFIX sys.exc_info)))
raise
return sets
def scanForRaid(drives):
"""Scans for dmraid devices on drives.
drives is a list of device names.
Returns a list of (raidSet, parentRaidSet, devices, level, totalDisks)
tuples.
"""
Sets = {}
Devices = {}
probeDrives = []
for d in drives:
dp = "/tmp/" + d
isys.makeDevInode(d, dp)
probeDrives.append(dp)
dmsets = block.get_raidsets(probeDrives)
for dmset in dmsets:
infos = getRaidSetInfo(dmset)
for info in infos:
(rs, parent, devices, level, nrDisks, totalDisks) = info
def startAllRaid(driveList):
"""Do a raid start on raid devices and return a list like scanForRaid."""
rc = []
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