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
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
|
#
# iscsi.py - iscsi class
#
# Copyright (C) 2005, 2006 IBM, Inc. All rights reserved.
# Copyright (C) 2006 Red Hat, Inc. All rights reserved.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
from pyanaconda.constants import *
from udev import udev_settle
from . import util
from .flags import flags
import os
import logging
import shutil
import time
import hashlib
import random
import itertools
log = logging.getLogger("storage")
import gettext
_ = lambda x: gettext.ldgettext("anaconda", x)
has_libiscsi = True
try:
import libiscsi
except ImportError:
has_libiscsi = False
# Note that stage2 copies all files under /sbin to /usr/sbin
ISCSID=""
INITIATOR_FILE="/etc/iscsi/initiatorname.iscsi"
ISCSI_MODULES=['cxgb3i', 'bnx2i', 'be2iscsi']
def has_iscsi():
global ISCSID
if not os.access("/sys/module/iscsi_tcp", os.X_OK):
return False
if not ISCSID:
location = util.find_program_in_path("iscsid")
if not location:
return False
ISCSID = location
log.info("ISCSID is %s" % (ISCSID,))
return True
def randomIname():
"""Generate a random initiator name the same way as iscsi-iname"""
s = "iqn.1994-05.com.domain:01."
m = hashlib.md5()
u = os.uname()
for i in u:
m.update(i)
dig = m.hexdigest()
for i in range(0, 6):
s += dig[random.randrange(0, 32)]
return s
class iscsi(object):
""" iSCSI utility class.
This class will automatically discover and login to iBFT (or
other firmware) configured iscsi devices when the startup() method
gets called. It can also be used to manually configure iscsi devices
through the addTarget() method.
As this class needs to make sure certain things like starting iscsid
and logging in to firmware discovered disks only happens once
and as it keeps a global list of all iSCSI devices it is implemented as
a Singleton.
"""
def __init__(self):
# Dictionary of discovered targets containing list of (node,
# logged_in) tuples.
self.discovered_targets = {}
# This list contains nodes discovered through iBFT (or other firmware)
self.ibftNodes = []
self._initiator = ""
self.initiatorSet = False
self.started = False
self.ifaces = {}
if flags.ibft:
try:
initiatorname = libiscsi.get_firmware_initiator_name()
self._initiator = initiatorname
self.initiatorSet = True
except Exception:
pass
# So that users can write iscsi() to get the singleton instance
def __call__(self):
return self
def _getInitiator(self):
if self._initiator != "":
return self._initiator
return randomIname()
def _setInitiator(self, val):
if self.initiatorSet and val != self._initiator:
raise ValueError, _("Unable to change iSCSI initiator name once set")
if len(val) == 0:
raise ValueError, _("Must provide an iSCSI initiator name")
self._initiator = val
initiator = property(_getInitiator, _setInitiator)
def active_nodes(self, target=None):
"""Nodes logged in to"""
if target:
return [node for (node, logged_in) in
self.discovered_targets.get(target, [])
if logged_in]
else:
return [node for (node, logged_in) in
itertools.chain(*self.discovered_targets.values())
if logged_in] + self.ibftNodes
def _getMode(self):
if not self.active_nodes():
return "none"
if self.ifaces:
return "bind"
else:
return "default"
mode = property(_getMode)
def _mark_node_active(self, node, active=True):
"""Mark node as one logged in to
Returns False if not found
"""
for target_nodes in self.discovered_targets.values():
for nodeinfo in target_nodes:
if nodeinfo[0] is node:
nodeinfo[1] = active
return True
return False
def _startIBFT(self):
if not flags.ibft:
return
try:
found_nodes = libiscsi.discover_firmware()
except Exception:
log.info("iscsi: No IBFT info found.");
# an exception here means there is no ibft firmware, just return
return
for node in found_nodes:
try:
node.login()
log.info("iscsi IBFT: logged into %s at %s:%s through %s" % (
node.name, node.address, node.port, node.iface))
self.ibftNodes.append(node)
except IOError as e:
log.error("Could not log into ibft iscsi target %s: %s" %
(node.name, str(e)))
pass
self.stabilize()
def stabilize(self):
# Wait for udev to create the devices for the just added disks
# It is possible when we get here the events for the new devices
# are not send yet, so sleep to make sure the events are fired
time.sleep(2)
udev_settle()
def create_interfaces(self, ifaces):
for iface in ifaces:
iscsi_iface_name = "iface%d" % len(self.ifaces)
#iscsiadm -m iface -I iface0 --op=new
util.run_program(["iscsiadm", "-m", "iface",
"-I", iscsi_iface_name, "--op=new"])
#iscsiadm -m iface -I iface0 --op=update -n iface.net_ifacename -v eth0
util.run_program(["iscsiadm", "-m", "iface",
"-I", iscsi_iface_name, "--op=update",
"-n", "iface.net_ifacename", "-v", iface])
self.ifaces[iscsi_iface_name] = iface
log.debug("created_interface %s:%s" % (iscsi_iface_name, iface))
def delete_interfaces(self):
if not self.ifaces:
return None
for iscsi_iface_name in self.ifaces:
#iscsiadm -m iface -I iface0 --op=delete
util.run_program(["iscsiadm", "-m", "iface",
"-I", iscsi_iface_name, "--op=delete"])
self.ifaces = {}
def startup(self):
if self.started:
return
if not has_iscsi():
return
if self._initiator == "":
log.info("no initiator set")
return
log.debug("Setting up %s" % (INITIATOR_FILE, ))
log.info("iSCSI initiator name %s", self.initiator)
if os.path.exists(INITIATOR_FILE):
os.unlink(INITIATOR_FILE)
if not os.path.isdir("/etc/iscsi"):
os.makedirs("/etc/iscsi", 0755)
fd = os.open(INITIATOR_FILE, os.O_RDWR | os.O_CREAT)
os.write(fd, "InitiatorName=%s\n" %(self.initiator))
os.close(fd)
self.initiatorSet = True
for dir in ['ifaces','isns','nodes','send_targets','slp','static']:
fulldir = "/var/lib/iscsi/%s" % (dir,)
if not os.path.isdir(fulldir):
os.makedirs(fulldir, 0755)
log.info("iSCSI startup")
util.run_program(['modprobe', '-a'] + ISCSI_MODULES)
# iscsiuio is needed by Broadcom offload cards (bnx2i). Currently
# not present in iscsi-initiator-utils for Fedora.
try:
iscsiuio = util.find_program_in_path('iscsiuio',
raise_on_error=True)
except RuntimeError:
log.info("iscsi: iscsiuio not found.")
else:
log.debug("iscsi: iscsiuio is at %s" % iscsiuio)
util.run_program([iscsiuio])
# run the daemon
util.run_program([ISCSID])
time.sleep(1)
self._startIBFT()
self.started = True
def discover(self, ipaddr, port="3260", username=None, password=None,
r_username=None, r_password=None, intf=None):
"""
Discover iSCSI nodes on the target available for login.
If we are logged in a node discovered for specified target
do not do the discovery again as it can corrupt credentials
stored for the node (setAuth and getAuth are using database
in /var/lib/iscsi/nodes which is filled by discovery). Just
return nodes obtained and stored in the first discovery
instead.
Returns list of nodes user can log in.
"""
authinfo = None
if not has_iscsi():
raise IOError, _("iSCSI not available")
if self._initiator == "":
raise ValueError, _("No initiator name set")
if self.active_nodes((ipaddr, port)):
log.debug("iSCSI: skipping discovery of %s:%s due to active nodes" %
(ipaddr, port))
else:
if username or password or r_username or r_password:
# Note may raise a ValueError
authinfo = libiscsi.chapAuthInfo(username=username,
password=password,
reverse_username=r_username,
reverse_password=r_password)
self.startup()
# Note may raise an IOError
found_nodes = libiscsi.discover_sendtargets(address=ipaddr,
port=int(port),
authinfo=authinfo)
if found_nodes is None:
return None
self.discovered_targets[(ipaddr, port)] = []
for node in found_nodes:
self.discovered_targets[(ipaddr, port)].append([node, False])
log.debug("discovered iSCSI node: %s" % node.name)
# only return the nodes we are not logged into yet
return [node for (node, logged_in) in
self.discovered_targets[(ipaddr, port)]
if not logged_in]
def log_into_node(self, node, username=None, password=None,
r_username=None, r_password=None, intf=None):
"""
Raises IOError.
"""
rc = False # assume failure
msg = ""
if intf:
w = intf.waitWindow(_("Logging in to iSCSI node"),
_("Logging in to iSCSI node %s") % node.name)
try:
authinfo = None
if username or password or r_username or r_password:
# may raise a ValueError
authinfo = libiscsi.chapAuthInfo(username=username,
password=password,
reverse_username=r_username,
reverse_password=r_password)
node.setAuth(authinfo)
node.login()
rc = True
log.info("iSCSI: logged into %s at %s:%s through %s" % (
node.name, node.address, node.port, node.iface))
if not self._mark_node_active(node):
log.error("iSCSI: node not found among discovered")
except (IOError, ValueError) as e:
msg = str(e)
log.warning("iSCSI: could not log into %s: %s" % (node.name, msg))
if intf:
w.pop()
return (rc, msg)
# NOTE: the same credentials are used for discovery and login
# (unlike in UI)
def addTarget(self, ipaddr, port="3260", user=None, pw=None,
user_in=None, pw_in=None, intf=None, target=None, iface=None):
found = 0
logged_in = 0
found_nodes = self.discover(ipaddr, port, user, pw, user_in, pw_in,
intf)
if found_nodes == None:
raise IOError, _("No iSCSI nodes discovered")
for node in found_nodes:
if target and target != node.name:
log.debug("iscsi: skipping logging to iscsi node '%s'" %
node.name)
continue
if iface:
node_net_iface = self.ifaces.get(node.iface, node.iface)
if iface != node_net_iface:
log.debug("iscsi: skipping logging to iscsi node '%s' via %s" %
(node.name, node_net_iface))
continue
found = found + 1
(rc, msg) = self.log_into_node(node, user, pw, user_in, pw_in,
intf)
if rc:
logged_in = logged_in +1
if found == 0:
raise IOError, _("No new iSCSI nodes discovered")
if logged_in == 0:
raise IOError, _("Could not log in to any of the discovered nodes")
self.stabilize(intf)
def write(self, storage):
if not self.initiatorSet:
return
# set iscsi nodes to autostart
root = storage.rootDevice
for node in self.active_nodes():
autostart = True
disks = self.getNodeDisks(node, storage)
for disk in disks:
# nodes used for root get started by the initrd
if root.dependsOn(disk):
autostart = False
if autostart:
node.setParameter("node.startup", "automatic")
if not os.path.isdir(ROOT_PATH + "/etc/iscsi"):
os.makedirs(ROOT_PATH + "/etc/iscsi", 0755)
fd = os.open(ROOT_PATH + INITIATOR_FILE, os.O_RDWR | os.O_CREAT)
os.write(fd, "InitiatorName=%s\n" %(self.initiator))
os.close(fd)
# copy "db" files. *sigh*
if os.path.isdir(ROOT_PATH + "/var/lib/iscsi"):
shutil.rmtree(ROOT_PATH + "/var/lib/iscsi")
if os.path.isdir("/var/lib/iscsi"):
shutil.copytree("/var/lib/iscsi", ROOT_PATH + "/var/lib/iscsi",
symlinks=True)
def getNode(self, name, address, port, iface):
for node in self.active_nodes():
if node.name == name and node.address == address and \
node.port == int(port) and node.iface == iface:
return node
return None
def getNodeDisks(self, node, storage):
nodeDisks = []
iscsiDisks = storage.devicetree.getDevicesByType("iscsi")
for disk in iscsiDisks:
if disk.node == node:
nodeDisks.append(disk)
return nodeDisks
# Create iscsi singleton
iscsi = iscsi()
# vim:tw=78:ts=4:et:sw=4
|