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 remove_stale_luns(hostids, lunid, expectedPath, mpath):
try:
for hostid in hostids:
# get all LUNs of the format hostid:x:y:lunid
luns = glob.glob('/dev/disk/by-scsibus/*-%s:*:*:%s' %
(hostid, lunid))
# try to get the scsiid for each of these luns
for lun in luns:
try:
getSCSIid(lun)
# if it works, we have a problem as this device should not
# be present and be valid on this system
util.SMlog("Warning! The lun %s should not be present and" \
" be valid on this system." % lun)
except:
# Now do the rest.
pass
# get the HBTL
basename = os.path.basename(lun)
hbtl_list = basename.split(':')
hbtl = basename.split('-')[1]
# the first one in scsiid-hostid
hbtl_list[0] = hbtl_list[0].split('-')[1]
expectedPath = expectedPath + '*' + hbtl
if not os.path.exists(expectedPath):
# wait for sometime and check if the expected path exists
# check if a rescan was done outside of this process
time.sleep(2)
if os.path.exists(expectedPath):
# do not remove device, this might be dangerous
util.SMlog("Path %s appeared before checking for "\
"stale LUNs, ignore this LUN %s." % (expectedPath, lun))
continue
# remove the scsi device
l = [os.path.realpath(lun), hbtl_list[0], hbtl_list[1], \
hbtl_list[2], hbtl_list[3]]
scsi_dev_ctrl(l, 'remove')
# if multipath is enabled, do a best effort cleanup
if mpath:
try:
path = os.path.basename(os.path.realpath(lun))
mpath_cli.remove_path(path)
except Exception, e:
util.SMlog("Failed to remove path %s, ignoring "\
"exception as path may not be present." % path)
except Exception, e:
util.SMlog("Exception removing stale LUNs, new devices may not come"\
" up properly! Error: %s" % str(e))
def remove_stale_luns(hostids, lunid, expectedPath, mpath):
try:
for hostid in hostids:
# get all LUNs of the format hostid:x:y:lunid
luns = glob.glob('/dev/disk/by-scsibus/*-%s:*:*:%s' % (hostid, lunid))
# try to get the scsiid for each of these luns
for lun in luns:
try:
getSCSIid(lun)
# if it works, we have a problem as this device should not
# be present and be valid on this system
util.SMlog("Warning! The lun %s should not be present and" \
" be valid on this system." % lun)
except:
# Now do the rest.
pass
# get the HBTL
basename = os.path.basename(lun)
hbtl_list = basename.split(':')
hbtl = basename.split('-')[1]
# the first one in scsiid-hostid
hbtl_list[0] = hbtl_list[0].split('-')[1]
expectedPath = expectedPath + '*' + hbtl
if not os.path.exists(expectedPath):
# wait for sometime and check if the expected path exists
# check if a rescan was done outside of this process
time.sleep(2)
if os.path.exists(expectedPath):
# do not remove device, this might be dangerous
util.SMlog("Path %s appeared before checking for "\
"stale LUNs, ignore this LUN %s." (expectedPath, lun))
continue
# remove the scsi device
l = [os.path.realpath(lun), hbtl_list[0], hbtl_list[1], \
hbtl_list[2], hbtl_list[3]]
scsi_dev_ctrl(l, 'remove')
# if multipath is enabled, do a best effort cleanup
if mpath:
try:
path = os.path.basename(os.path.realpath(lun))
mpath_cli.remove_path(path)
except Exception, e:
util.SMlog("Failed to remove path %s, ignoring "\
"exception as path may not be present." % path)
except Exception, e:
util.SMlog("Exception removing stale LUNs, new devices may not come"\
" up properly! Error: %s" % str(e))
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 remove(scsi_id):
paths=mpath_cli.list_paths(scsi_id)
mpath_cli.remove_map(scsi_id)
for path in paths:
mpath_cli.remove_path(path)
def remove(scsi_id):
paths=mpath_cli.list_paths(scsi_id)
mpath_cli.remove_map(scsi_id)
for path in paths:
mpath_cli.remove_path(path)