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 map_by_scsibus(sid,npaths=0):
# Synchronously creates/refreshs the MP map for a single SCSIid.
# Gathers the device vector from /dev/disk/by-scsibus - we expect
# there to be 'npaths' paths
util.SMlog("map_by_scsibus: sid=%s" % sid)
devices = []
# Wait for up to 60 seconds for n devices to appear
for attempt in range(0,60):
devices = scsiutil._genReverseSCSIidmap(sid)
# If we've got the right number of paths, or we don't know
# how many devices there ought to be, tell multipathd about
# the paths, and return.
if(len(devices)>=npaths or npaths==0):
# Enable this device's sid: it could be blacklisted
# We expect devices to be blacklisted according to their
# wwid only. We go through the list of paths until we have
# a definite answer about the device's blacklist status.
# If the path we are checking is down, we cannot tell.
for dev in devices:
try:
if wwid_conf.is_blacklisted(dev):
try:
wwid_conf.edit_wwid(sid)
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)
break
except wwid_conf.WWIDException as e:
util.SMlog(e.errstr)
else:
util.SMlog("Device 'SCSI_id: {}' is inaccessible; "
"All paths are down.".format(sid))
__map_explicit(devices)
return
time.sleep(1)
__map_explicit(devices)
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 map_by_scsibus(sid, npaths=0):
# Synchronously creates/refreshs the MP map for a single SCSIid.
# Gathers the device vector from /dev/disk/by-scsibus - we expect
# there to be 'npaths' paths
util.SMlog("map_by_scsibus: sid=%s" % sid)
devices = []
# Wait for up to 60 seconds for n devices to appear
for attempt in range(0, 60):
devices = scsiutil._genReverseSCSIidmap(sid)
# If we've got the right number of paths, or we don't know
# how many devices there ought to be, tell multipathd about
# the paths, and return.
if (len(devices) >= npaths or npaths == 0):
# Enable this device's sid: it could be blacklisted
# We expect devices to be blacklisted according to their
# wwid only. We go through the list of paths until we have
# a definite answer about the device's blacklist status.
# If the path we are checking is down, we cannot tell.
for dev in devices:
try:
if wwid_conf.is_blacklisted(dev):
try:
wwid_conf.edit_wwid(sid)
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)
break
except wwid_conf.WWIDException as e:
util.SMlog(e.errstr)
else:
util.SMlog("Device 'SCSI_id: {}' is inaccessible; "
"All paths are down.".format(sid))
__map_explicit(devices)
return
time.sleep(1)
__map_explicit(devices)
def map_by_scsibus(sid,npaths=0):
# Synchronously creates/refreshs the MP map for a single SCSIid.
# Gathers the device vector from /dev/disk/by-scsibus - we expect
# there to be 'npaths' paths
util.SMlog("map_by_scsibus: sid=%s" % sid)
devices = []
# Wait for up to 60 seconds for n devices to appear
for attempt in range(0,60):
devices = scsiutil._genReverseSCSIidmap(sid)
# If we've got the right number of paths, or we don't know
# how many devices there ought to be, tell multipathd about
# the paths, and return.
if(len(devices)>=npaths or npaths==0):
# Enable this device's sid: it could be blacklisted
# We expect devices to be blacklisted according to their
# wwid only. Checking the first one is sufficient
if wwid_conf.is_blacklisted(devices[0]):
try:
wwid_conf.edit_wwid(sid)
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)
__map_explicit(devices)
return
time.sleep(1)
__map_explicit(devices)
def map_by_scsibus(sid, npaths=0):
# Synchronously creates/refreshs the MP map for a single SCSIid.
# Gathers the device vector from /dev/disk/by-scsibus - we expect
# there to be 'npaths' paths
util.SMlog("map_by_scsibus: sid=%s" % sid)
devices = []
# Wait for up to 60 seconds for n devices to appear
for attempt in range(0, 60):
devices = scsiutil._genReverseSCSIidmap(sid)
# If we've got the right number of paths, or we don't know
# how many devices there ought to be, tell multipathd about
# the paths, and return.
if (len(devices) >= npaths or npaths == 0):
# Enable this device's sid: it could be blacklisted
# We expect devices to be blacklisted according to their
# wwid only. Checking the first one is sufficient
if wwid_conf.is_blacklisted(devices[0]):
try:
wwid_conf.edit_wwid(sid)
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)
__map_explicit(devices)
return
time.sleep(1)
__map_explicit(devices)