def _resetDMP(sid,explicit_unmap=False,delete_nodes=False):
# If mpath has been turned on since the sr/vdi was attached, we
# might be trying to unmap it before the daemon has been started
# This is unnecessary (and will fail) so just return.
deactivate_MPdev(sid)
if not _is_mpath_daemon_running():
util.SMlog("Warning: Trying to unmap mpath device when multipathd not running")
return
# If the multipath daemon is running, but we were initially plugged
# with multipathing set to no, there may be no map for us in the multipath
# tables. In that case, list_paths will return [], but remove_map might
# throw an exception. Catch it and ignore it.
if explicit_unmap:
util.retry(lambda: util.pread2(['/usr/sbin/multipath', '-f', sid]),
maxretry = 3, period = 4)
util.retry(lambda: util.pread2(['/usr/sbin/multipath', '-W']), maxretry = 3,
period = 4)
else:
mpath_cli.ensure_map_gone(sid)
path = "/dev/mapper/%s" % sid
if not util.wait_for_nopath(path, 10):
util.SMlog("MPATH: WARNING - path did not disappear [%s]" % path)
else:
util.SMlog("MPATH: path disappeared [%s]" % path)
def _resetDMP(sid, explicit_unmap=False):
# If mpath has been turned on since the sr/vdi was attached, we
# might be trying to unmap it before the daemon has been started
# This is unnecessary (and will fail) so just return.
deactivate_MPdev(sid)
if not _is_mpath_daemon_running():
util.SMlog("Warning: Trying to unmap mpath device when multipathd not running")
return
# If the multipath daemon is running, but we were initially plugged
# with multipathing set to no, there may be no map for us in the multipath
# tables. In that case, list_paths will return [], but remove_map might
# throw an exception. Catch it and ignore it.
if explicit_unmap:
util.retry(lambda: util.pread2(['/usr/sbin/multipath', '-f', sid]),
maxretry=3, period=4)
util.retry(lambda: util.pread2(['/usr/sbin/multipath', '-W']), maxretry=3,
period=4)
else:
mpath_cli.ensure_map_gone(sid)
path = "/dev/mapper/%s" % sid
if not util.wait_for_nopath(path, 10):
util.SMlog("MPATH: WARNING - path did not disappear [%s]" % path)
else:
util.SMlog("MPATH: path disappeared [%s]" % path)
def _resetDMP(sid,explicit_unmap=False):
# If mpath has been turned on since the sr/vdi was attached, we
# might be trying to unmap it before the daemon has been started
# This is unnecessary (and will fail) so just return.
deactivate_MPdev(sid)
if not _is_mpath_daemon_running():
util.SMlog("Warning: Trying to unmap mpath device when multipathd not running")
return
# If the multipath daemon is running, but we were initially plugged
# with multipathing set to no, there may be no map for us in the multipath
# tables. In that case, list_paths will return [], but remove_map might
# throw an exception. Catch it and ignore it.
if explicit_unmap:
util.SMlog("Explicit unmap")
devices = mpath_cli.list_paths(sid)
try:
mpath_cli.remove_map(sid)
except:
util.SMlog("Warning: Removing the path failed")
pass
for device in devices:
mpath_cli.remove_path(device)
else:
mpath_cli.ensure_map_gone(sid)
path = "/dev/mapper/%s" % sid
if not util.wait_for_nopath(path, 10):
util.SMlog("MPATH: WARNING - path did not disappear [%s]" % path)
else:
util.SMlog("MPATH: path disappeared [%s]" % path)
def _resetDMP(sid, explicit_unmap=False, delete_nodes=False):
# If mpath has been turned on since the sr/vdi was attached, we
# might be trying to unmap it before the daemon has been started
# This is unnecessary (and will fail) so just return.
deactivate_MPdev(sid)
if not _is_mpath_daemon_running():
util.SMlog(
"Warning: Trying to unmap mpath device when multipathd not running"
)
return
# If the multipath daemon is running, but we were initially plugged
# with multipathing set to no, there may be no map for us in the multipath
# tables. In that case, list_paths will return [], but remove_map might
# throw an exception. Catch it and ignore it.
if explicit_unmap:
util.SMlog("Explicit unmap")
# Remove map from conf file, if any
try:
wwid_conf.edit_wwid(sid, True)
except:
util.SMlog("WARNING: exception raised while attempting to"
" modify multipath.conf")
try:
mpath_cli.reconfigure()
except:
util.SMlog("WARNING: exception raised while attempting to"
" reconfigure")
time.sleep(5)
devices = mpath_cli.list_paths(sid)
try:
mpath_cli.remove_map(sid)
except:
util.SMlog("Warning: Removing the path failed")
pass
for device in devices:
mpath_cli.remove_path(device)
if delete_nodes:
_delete_node(device)
else:
mpath_cli.ensure_map_gone(sid)
path = "/dev/mapper/%s" % sid
if not util.wait_for_nopath(path, 10):
util.SMlog("MPATH: WARNING - path did not disappear [%s]" % path)
else:
util.SMlog("MPATH: path disappeared [%s]" % path)
def _detach_LUN_bylunid(self, lunid, SCSIid):
if not self.attached:
raise xs_errors.XenError("SRUnavailable")
if self.mpath == "true" and len(SCSIid):
self.mpathmodule.reset(SCSIid, True)
util.remove_mpathcount_field(self.session, self.host_ref, self.sr_ref, SCSIid)
for val in self.adapter:
if not self.pathdict.has_key(val):
continue
rec = self.pathdict[val]
path = os.path.join(rec["path"], "LUN%s" % lunid)
realpath = os.path.realpath(path)
if self.devs.has_key(realpath):
util.SMlog("Found key: %s" % realpath)
scsiutil.scsi_dev_ctrl(self.devs[realpath], "remove")
# Wait for device to disappear
if not util.wait_for_nopath(realpath, MAX_LUNID_TIMEOUT):
util.SMlog("Device has not disappeared after %d seconds" % MAX_LUNID_TIMEOUT)
else:
util.SMlog("Device [%s,%s] disappeared" % (realpath, path))
def _detach_LUN_bylunid(self, lunid, SCSIid):
if not self.attached:
raise xs_errors.XenError('SRUnavailable')
if self.mpath == 'true' and len(SCSIid):
self.mpathmodule.reset(SCSIid, True)
util.remove_mpathcount_field(self.session, self.host_ref, self.sr_ref, SCSIid)
for val in self.adapter:
if not self.pathdict.has_key(val):
continue
rec = self.pathdict[val]
path = os.path.join(rec['path'],"LUN%s" % lunid)
realpath = os.path.realpath(path)
if self.devs.has_key(realpath):
util.SMlog("Found key: %s" % realpath)
scsiutil.scsi_dev_ctrl(self.devs[realpath], 'remove')
# Wait for device to disappear
if not util.wait_for_nopath(realpath, MAX_LUNID_TIMEOUT):
util.SMlog("Device has not disappeared after %d seconds" % \
MAX_LUNID_TIMEOUT)
else:
util.SMlog("Device [%s,%s] disappeared" % (realpath,path))
def refresh_scsi_channel(channel):
DEV_WAIT = 5
util.SMlog("Refreshing channel %s" % channel)
util.wait_for_path('/dev/disk/by-scsibus/*-%s*' % channel, DEV_WAIT)
LUNs = glob.glob('/dev/disk/by-scsibus/*-%s*' % channel)
try:
rootdevs = util.dom0_disks()
except:
util.SMlog("Failed to query root disk, failing operation")
return False
# a) Find a LUN to issue a Query LUNs command
li = []
Query = False
for lun in LUNs:
try:
hbtl = lun.split('-')[-1]
h = hbtl.split(':')
l=util.pread2(["/usr/bin/sg_luns","-q",lun]).split('\n')
li = []
for i in l:
if len(i):
li.append(int(i[0:4], 16))
util.SMlog("sg_luns query returned %s" % li)
Query = True
break
except:
pass
if not Query:
util.SMlog("Failed to detect or query LUN on Channel %s" % channel)
return False
# b) Remove stale LUNs
current = glob.glob('/dev/disk/by-scsibus/*-%s:%s:%s*' % (h[0],h[1],h[2]))
for cur in current:
lunID = int(cur.split(':')[-1])
newhbtl = ['',h[0],h[1],h[2],str(lunID)]
if os.path.realpath(cur) in rootdevs:
# Don't touch the rootdev
if lunID in li: li.remove(lunID)
continue
# Check if LUN is stale, and remove it
if not lunID in li:
util.SMlog("Stale LUN detected. Removing HBTL: %s" % newhbtl)
scsi_dev_ctrl(newhbtl,"remove")
util.wait_for_nopath(cur, DEV_WAIT)
continue
else:
li.remove(lunID)
# Query SCSIid, check it matches, if not, re-probe
cur_SCSIid = os.path.basename(cur).split("-%s:%s:%s" % (h[0],h[1],h[2]))[0]
real_SCSIid = getSCSIid(cur)
if cur_SCSIid != real_SCSIid:
util.SMlog("HBTL %s does not match, re-probing" % newhbtl)
scsi_dev_ctrl(newhbtl,"remove")
util.wait_for_nopath(cur, DEV_WAIT)
scsi_dev_ctrl(newhbtl,"add")
util.wait_for_path('/dev/disk/by-scsibus/%s-%s' % (real_SCSIid,hbtl), DEV_WAIT)
pass
# c) Probe for any LUNs that are not present in the system
for l in li:
newhbtl = ['',h[0],h[1],h[2],str(l)]
util.SMlog("Probing new HBTL: %s" % newhbtl)
scsi_dev_ctrl(newhbtl,"add")
util.wait_for_path('/dev/disk/by-scsibus/*-%s' % hbtl, DEV_WAIT)
return True
def refresh_scsi_channel(channel):
DEV_WAIT = 5
util.SMlog("Refreshing channel %s" % channel)
util.wait_for_path('/dev/disk/by-scsibus/*-%s*' % channel, DEV_WAIT)
LUNs = glob.glob('/dev/disk/by-scsibus/*-%s*' % channel)
try:
rootdevs = util.dom0_disks()
except:
util.SMlog("Failed to query root disk, failing operation")
return False
# a) Find a LUN to issue a Query LUNs command
li = []
Query = False
for lun in LUNs:
try:
hbtl = lun.split('-')[-1]
h = hbtl.split(':')
l = util.pread2(["/usr/bin/sg_luns", "-q", lun]).split('\n')
li = []
for i in l:
if len(i):
li.append(int(i[0:4], 16))
util.SMlog("sg_luns query returned %s" % li)
Query = True
break
except:
pass
if not Query:
util.SMlog("Failed to detect or query LUN on Channel %s" % channel)
return False
# b) Remove stale LUNs
current = glob.glob('/dev/disk/by-scsibus/*-%s:%s:%s*' %
(h[0], h[1], h[2]))
for cur in current:
lunID = int(cur.split(':')[-1])
newhbtl = ['', h[0], h[1], h[2], str(lunID)]
if os.path.realpath(cur) in rootdevs:
# Don't touch the rootdev
if lunID in li: li.remove(lunID)
continue
# Check if LUN is stale, and remove it
if not lunID in li:
util.SMlog("Stale LUN detected. Removing HBTL: %s" % newhbtl)
scsi_dev_ctrl(newhbtl, "remove")
util.wait_for_nopath(cur, DEV_WAIT)
continue
else:
li.remove(lunID)
# Check if the device is still present
if not os.path.exists(cur):
continue
# Query SCSIid, check it matches, if not, re-probe
cur_SCSIid = os.path.basename(cur).split("-%s:%s:%s" %
(h[0], h[1], h[2]))[0]
real_SCSIid = getSCSIid(cur)
if cur_SCSIid != real_SCSIid:
util.SMlog("HBTL %s does not match, re-probing" % newhbtl)
scsi_dev_ctrl(newhbtl, "remove")
util.wait_for_nopath(cur, DEV_WAIT)
scsi_dev_ctrl(newhbtl, "add")
util.wait_for_path(
'/dev/disk/by-scsibus/%s-%s' % (real_SCSIid, hbtl), DEV_WAIT)
pass
# c) Probe for any LUNs that are not present in the system
for l in li:
newhbtl = ['', h[0], h[1], h[2], str(l)]
newhbtlstr = "%s:%s:%s:%s" % (h[0], h[1], h[2], str(l))
util.SMlog("Probing new HBTL: %s" % newhbtl)
scsi_dev_ctrl(newhbtl, "add")
util.wait_for_path('/dev/disk/by-scsibus/*-%s' % newhbtlstr, DEV_WAIT)
return True
