1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
|
#!/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 string
import block
import partedUtils
import raid
from flags import flags
import logging
from anaconda_log import logger, logFile
logger.addLogger ("anaconda.dmraid", minLevel=logging.DEBUG)
log = logging.getLogger("anaconda.dmraid")
logger.addFileHandler (logFile, log)
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" ]
dmNameUpdates = {}
class DmDriveCache:
def __init__(self):
self.cache = {}
def add(self, rs):
isys.cachedDrives["mapper/" + rs.name] = rs
log.debug("adding %s to isys cache" % ("mapper/" + rs.name,))
for m in rs.members:
if isinstance(m, block.RaidDev):
disk = m.rd.device.path.split('/')[-1]
if isys.cachedDrives.has_key(disk):
self.cache.setdefault(rs.name, {})
self.cache[rs.name][rs.name] = rs
log.debug("adding %s to dmraid cache" % (disk,))
self.cache[rs.name][disk] = isys.cachedDrives[disk]
log.debug("removing %s from isys cache" % (disk,))
del isys.cachedDrives[disk]
def remove(self, name):
if isys.cachedDrives.has_key(name):
rs = isys.cachedDrives[name]
log.debug("removing %s from isys cache" % (name,))
del isys.cachedDrives[name]
if self.cache.has_key(rs.name):
del self.cache[rs.name][rs.name]
for k,v in self.cache[rs.name].items():
log.debug("adding %s from to isys cache" % (name,))
isys.cachedDrives[k] = v
log.debug("removing %s from dmraid cache" % (rs,))
del self.cache[rs.name]
def rename(self, rs, newname):
oldname = 'mapper/' + rs.name
if isys.cachedDrives.has_key(oldname):
dmNameUpdates[rs.name] = newname
self.remove(oldname)
# XXX why doesn't setting the property work?
rs.set_name(newname)
self.add(rs)
def __contains__(self, name):
for k in self.cache.keys():
if k.name == name:
return True
return False
cacheDrives = DmDriveCache()
class DegradedRaidWarning(Warning):
def __init__(self, *args):
self.args = args
def __str__(self):
return self.args and ('%s' % self.args[0]) or repr(self)
def scanForRaid(drives, degradedOk=False):
"""Scans for dmraid devices on drives.
drives is a list of device names.
Returns a list of (raidSet, parentRaidSet, devices, level, totalDisks)
tuples.
"""
log.debug("scanning for dmraid on drives %s" % (drives,))
Sets = {}
Devices = {}
probeDrives = []
for d in drives:
dp = "/dev/" + d
isys.makeDevInode(d, dp)
probeDrives.append(dp)
dp = "/tmp/" + d
isys.makeDevInode(d, dp)
dmsets = []
def nonDegraded(rs):
log.debug("got raidset %s (%s)" % (rs, string.join(rs.member_devpaths)))
log.debug(" valid: %s found_devs: %s total_devs: %s" % (rs.valid, rs.rs.found_devs, rs.rs.total_devs))
if not rs.valid and not degradedOk:
log.warning("raid %s (%s) is degraded" % (rs, rs.name))
#raise DegradedRaidWarning, rs
return False
return True
raidsets = filter(nonDegraded, block.getRaidSets(probeDrives) or [])
def updateName(rs):
if dmNameUpdates.has_key(rs.name):
rs.set_name(dmNameUpdates[rs.name])
cacheDrives.add(rs)
return rs
return reduce(lambda x,y: x + [updateName(y),], raidsets, [])
def renameRaidSet(rs, name):
cacheDrives.rename(rs, name)
def startRaidDev(rs):
if flags.dmraid == 0:
return
rs.prefix = '/dev/mapper/'
log.debug("starting raid %s with mknod=True" % (rs,))
rs.activate(mknod=True)
def startAllRaid(driveList):
"""Do a raid start on raid devices."""
if not flags.dmraid:
return []
log.debug("starting all dmraids on drives %s" % (driveList,))
dmList = scanForRaid(driveList)
for rs in dmList:
startRaidDev(rs)
return dmList
def stopRaidSet(rs):
if flags.dmraid == 0:
return
log.debug("stopping raid %s" % (rs,))
name = "mapper/" + rs.name
if name in cacheDrives:
cacheDrives.remove(name)
rs.deactivate()
#block.removeDeviceMap(map)
def stopAllRaid(dmList):
"""Do a raid stop on each of the raid device tuples given."""
if not flags.dmraid:
return
log.debug("stopping all dmraids")
for rs in dmList:
stopRaidSet(rs)
def isRaid6(raidlevel):
"""Return whether raidlevel is a valid descriptor of RAID6."""
return False
def isRaid5(raidlevel):
"""Return whether raidlevel is a valid descriptor of RAID5."""
return False
def isRaid1(raidlevel):
"""Return whether raidlevel is a valid descriptor of RAID1."""
return raid.isRaid1(raidlevel)
def isRaid0(raidlevel):
"""Return whether raidlevel is a valid descriptor of RAID1."""
return raid.isRaid0(raidlevel)
def get_raid_min_members(raidlevel):
"""Return the minimum number of raid members required for raid level"""
return raid.get_raid_min_members(raidlevel)
def get_raid_max_spares(raidlevel, nummembers):
"""Return the maximum number of raid spares for raidlevel."""
return raid.get_raid_max_spares(raidlevel, nummembers)
def register_raid_device(dmname, newdevices, newlevel, newnumActive):
"""Register a new RAID device in the dmlist."""
raise NotImplementedError
def lookup_raid_device(dmname):
"""Return the requested RAID device information."""
for rs, parent, devices, level, nrDisks, totalDisks in \
partedUtils.DiskSet.dmList:
if dmname == rs.name:
return (rs.name, devices, level, totalDisks)
raise KeyError, "dm device not found"
|
