def _find_LUN(svid):
basepath = "/dev/disk/by-csldev/"
if svid.startswith("NETAPP_"):
# special attention for NETAPP SVIDs
svid_parts = svid.split("__")
globstr = basepath + "NETAPP__LUN__" + "*" + svid_parts[2] + "*" + svid_parts[-1] + "*"
else:
globstr = basepath + svid + "*"
path = util.wait_for_path_multi(globstr, MAX_TIMEOUT)
if not len(path):
return []
#Find CSLDEV paths
svid_to_use = re.sub("-[0-9]*:[0-9]*:[0-9]*:[0-9]*$","",os.path.basename(path))
devs = scsiutil._genReverseSCSIidmap(svid_to_use, pathname="csldev")
#Find scsiID
for dev in devs:
try:
SCSIid = scsiutil.getSCSIid(dev)
except:
pass
#Find root device and return
if not SCSIid:
return []
else:
device=mpath_dmp.path(SCSIid)
XenCertPrint("DEBUG: device path : %s"%(device))
return [device]
def _find_LUN(svid):
basepath = "/dev/disk/by-csldev/"
if svid.startswith("NETAPP_"):
# special attention for NETAPP SVIDs
svid_parts = svid.split("__")
globstr = basepath + "NETAPP__LUN__" + "*" + svid_parts[2] + "*" + svid_parts[-1] + "*"
else:
globstr = basepath + svid + "*"
path = util.wait_for_path_multi(globstr, MAX_TIMEOUT)
if not len(path):
return []
#Find CSLDEV paths
svid_to_use = re.sub("-[0-9]*:[0-9]*:[0-9]*:[0-9]*$","",os.path.basename(path))
devs = scsiutil._genReverseSCSIidmap(svid_to_use, pathname="csldev")
#Find scsiID
for dev in devs:
try:
SCSIid = scsiutil.getSCSIid(dev)
except:
pass
#Find root device and return
if not SCSIid:
return []
else:
device=mpath_dmp.path(SCSIid)
XenCertPrint("DEBUG: device path : %s"%(device))
return [device]
def attach(self, sr_uuid, vdi_uuid):
# Perform a device scan for all paths, to check for any LUN resize
scsi_id = self.sm_config['SCSIid']
devices = scsiutil._genReverseSCSIidmap(scsi_id)
xapi_session = self.session.xenapi
# At the vdi attach stage if devices are not found against the scsi_id,
# the two reasons would be 1. The machine is slave on which a bus scan
# was not performed, perform a bus scan to rectify the same. 2. Genuine
# HBA bus error, throw an error back.
if len(devices) == 0:
devscan.adapters()
devices = scsiutil._genReverseSCSIidmap(scsi_id)
# If no devices are found after a bus rescan, flag an error
if len(devices) == 0:
raise xs_errors.XenError('InvalidDev', \
opterr=('No HBA Device detected with SCSI Id[%s]') % scsi_id)
# Run a query on devices against the scsi id to refresh the size
dev_lun_info = scsiutil.cacheSCSIidentifiers()
for dev in devices:
self._query(dev, dev_lun_info[dev][4], vdi_uuid)
#Update xapi with the new size
vdi_ref = self.sr.session.xenapi.VDI.get_by_uuid(vdi_uuid)
self.sr.session.xenapi.VDI.set_virtual_size(vdi_ref, str(self.size))
# Multipath enable
if self.sr.mpath == "true":
self.sr.mpathmodule.refresh(scsi_id, len(devices))
self.path = self.sr.mpathmodule.path(scsi_id)
# The SCSIid is already stored inside SR sm_config.
# We need only to trigger mpathcount
try:
cmd = ['/opt/xensource/sm/mpathcount.py', scsi_id]
util.pread2(cmd)
except:
util.SMlog("RawHBA: something wrong with mpathcount")
ret = VDI.VDI.attach(self, sr_uuid, vdi_uuid)
self.sr.update_stats(self.size)
return ret
def attach(self, sr_uuid, vdi_uuid):
# Perform a device scan for all paths, to check for any LUN resize
scsi_id = self.sm_config['SCSIid']
devices = scsiutil._genReverseSCSIidmap(scsi_id)
xapi_session = self.session.xenapi
# At the vdi attach stage if devices are not found against the scsi_id,
# the two reasons would be 1. The machine is slave on which a bus scan
# was not performed, perform a bus scan to rectify the same. 2. Genuine
# HBA bus error, throw an error back.
if len(devices) == 0:
devscan.adapters()
devices = scsiutil._genReverseSCSIidmap(scsi_id)
# If no devices are found after a bus rescan, flag an error
if len(devices) == 0:
raise xs_errors.XenError('InvalidDev', \
opterr=('No HBA Device detected with SCSI Id[%s]') % scsi_id)
# Run a query on devices against the scsi id to refresh the size
dev_lun_info = scsiutil.cacheSCSIidentifiers()
for dev in devices:
self._query(dev, dev_lun_info[dev][4], vdi_uuid)
#Update xapi with the new size
vdi_ref = self.sr.session.xenapi.VDI.get_by_uuid(vdi_uuid)
self.sr.session.xenapi.VDI.set_virtual_size(vdi_ref, str(self.size))
# Multipath enable
if self.sr.mpath == "true":
self.sr.mpathmodule.refresh(scsi_id, len(devices))
self.path = self.sr.mpathmodule.path(scsi_id)
# The SCSIid is already stored inside SR sm_config.
# We need only to trigger mpathcount
try:
cmd = [os.path.join(constants.SM_DEST, 'mpathcount.py'), scsi_id]
util.pread2(cmd)
except:
util.SMlog("RawHBA: something wrong with mpathcount")
ret = VDI.VDI.attach(self, sr_uuid, vdi_uuid)
self.sr.update_stats(self.size)
return ret
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. 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 _find_LUN(svid):
basepath = "/dev/disk/by-csldev/"
if svid.startswith("NETAPP_"):
# special attention for NETAPP SVIDs
svid_parts = svid.split("__")
globstr = basepath + "NETAPP__LUN__" + "*" + svid_parts[2] + "*" + svid_parts[-1] + "*"
else:
globstr = basepath + svid + "*"
path = util.wait_for_path_multi(globstr, MAX_TIMEOUT)
if not len(path):
return []
svid_to_use = re.sub("-[0-9]*:[0-9]*:[0-9]*:[0-9]*$","",os.path.basename(path))
return scsiutil._genReverseSCSIidmap(svid_to_use, pathname="csldev")
def GetConfig(scsiid):
try:
retVal = True
configMap = {}
device = scsiutil._genReverseSCSIidmap(scsiid)[0]
XenCertPrint("GetConfig - device: %s" % device)
cmd = ["/usr/lib/udev/scsi_id", "--replace-whitespace", "--whitelisted", "--export", device]
ret = util.pread2(cmd)
XenCertPrint("GetConfig - scsi_if output: %s" % ret)
for tuple in ret.split('\n'):
if tuple.find('=') != -1:
configMap[tuple.split('=')[0]] = tuple.split('=')[1]
except Exception, e:
XenCertPrint("There was an exception getting SCSI device config. Exception: %s" % str(e))
retVal = False
def _query(self, path, id, uuid=None, scsi_id=None):
"""Overloaded function with mostly duplicated code"""
if uuid:
self.uuid = uuid
else:
util.SMlog("RawHBA: uuid should not be generated..")
self.uuid = scsiutil.gen_uuid_from_string(
scsiutil.getuniqueserial(path)
)
if scsi_id:
self.SCSIid = scsi_id
else:
# It is usually unnecessary to calculate it again but scsi_id
# is used as a flag in this function and we cannot guarantee
# this info is already available at call time
self.SCSIid = scsiutil.getSCSIid(path)
self.location = self.uuid
self.vendor = scsiutil.getmanufacturer(path)
self.serial = scsiutil.getserial(path)
self.LUNid = id
# Handle resize done at the array size. The resize gets reflected
# only when the vdi is not in detached state. Do this if we the vdi
# is known to xapi
try:
vdi_ref = self.sr.session.xenapi.VDI.get_by_uuid(self.uuid)
# Check if the vbd is not in attached state, do a LUN rescan
# to reflect the array LUN
dev = [path]
if scsi_id:
# We want all the devices with this scsi_id
dev = scsiutil._genReverseSCSIidmap(scsi_id)
if self.sr.srcmd.cmd == "vdi_attach":
scsiutil.refreshdev(dev)
elif not B_util.is_vdi_attached(self.sr.session, vdi_ref):
scsiutil.refreshdev(dev)
except:
pass
self.size = scsiutil.getsize(path)
self.path = path
sm_config = util.default(self, "sm_config", lambda: {})
sm_config['LUNid'] = str(self.LUNid)
sm_config['SCSIid'] = self.SCSIid
# Make sure to use kernel blkback (not blktap3) for raw LUNs
sm_config['backend-kind'] = 'vbd'
self.sm_config = sm_config
def _query(self, path, id, uuid=None, scsi_id=None):
"""Overloaded function with mostly duplicated code"""
if uuid:
self.uuid = uuid
else:
util.SMlog("RawHBA: uuid should not be generated..")
self.uuid = scsiutil.gen_uuid_from_string(
scsiutil.getuniqueserial(path)
)
if scsi_id:
self.SCSIid = scsi_id
else:
# It is usually unnecessary to calculate it again but scsi_id
# is used as a flag in this function and we cannot guarantee
# this info is already available at call time
self.SCSIid = scsiutil.getSCSIid(path)
self.location = self.uuid
self.vendor = scsiutil.getmanufacturer(path)
self.serial = scsiutil.getserial(path)
self.LUNid = id
# Handle resize done at the array size. The resize gets reflected
# only when the vdi is not in detached state. Do this if we the vdi
# is known to xapi
try:
vdi_ref = self.sr.session.xenapi.VDI.get_by_uuid(self.uuid)
# Check if the vbd is not in attached state, do a LUN rescan
# to reflect the array LUN
dev = [path]
if scsi_id:
# We want all the devices with this scsi_id
dev = scsiutil._genReverseSCSIidmap(scsi_id)
if self.sr.srcmd.cmd == "vdi_attach":
scsiutil.refreshdev(dev)
elif not B_util.is_vdi_attached(self.sr.session, vdi_ref):
scsiutil.refreshdev(dev)
except:
pass
self.size = scsiutil.getsize(path)
self.path = path
sm_config = util.default(self, "sm_config", lambda: {})
sm_config['LUNid'] = str(self.LUNid)
sm_config['SCSIid'] = self.SCSIid
# Make sure to use kernel blkback (not blktap3) for raw LUNs
sm_config['backend-kind'] = 'vbd'
self.sm_config = sm_config
def _find_LUN(svid):
basepath = "/dev/disk/by-csldev/"
if svid.startswith("NETAPP_"):
# special attention for NETAPP SVIDs
svid_parts = svid.split("__")
globstr = basepath + "NETAPP__LUN__" + "*" + svid_parts[
2] + "*" + svid_parts[-1] + "*"
else:
globstr = basepath + svid + "*"
path = util.wait_for_path_multi(globstr, MAX_TIMEOUT)
if not len(path):
return []
svid_to_use = re.sub("-[0-9]*:[0-9]*:[0-9]*:[0-9]*$", "",
os.path.basename(path))
return scsiutil._genReverseSCSIidmap(svid_to_use, pathname="csldev")
def GetConfig(scsiid):
try:
retVal = True
configMap = {}
device = scsiutil._genReverseSCSIidmap(scsiid)[0]
XenCertPrint("GetConfig - device: %s" % device)
list = device.split('/')[1]
justDev = device.split('/')[2]
XenCertPrint("GetConfig - just the device: %s" % justDev)
cmd = ["scsi_id", "-u", "-g", "-x", "-s", "/block/%s" % justDev, "-d", device]
ret = util.pread2(cmd)
XenCertPrint("GetConfig - scsi_if output: %s" % ret)
for tuple in ret.split('\n'):
if tuple.find('=') != -1:
configMap[tuple.split('=')[0]] = tuple.split('=')[1]
except Exception, e:
XenCertPrint("There was an exception getting SCSI device config. Exception: %s" % str(e))
retVal = False
def GetConfig(scsiid):
try:
retVal = True
configMap = {}
device = scsiutil._genReverseSCSIidmap(scsiid)[0]
XenCertPrint("GetConfig - device: %s" % device)
list = device.split('/')[1]
justDev = device.split('/')[2]
XenCertPrint("GetConfig - just the device: %s" % justDev)
cmd = ["scsi_id", "-u", "-g", "-x", "-s", "/block/%s" % justDev, "-d", device]
ret = util.pread2(cmd)
XenCertPrint("GetConfig - scsi_if output: %s" % ret)
for tuple in ret.split('\n'):
if tuple.find('=') != -1:
configMap[tuple.split('=')[0]] = tuple.split('=')[1]
except Exception, e:
XenCertPrint("There was an exception getting SCSI device config. Exception: %s" % str(e))
retVal = False
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 set_scheduler(dev, str):
devices = []
if not scsiutil.match_dm(dev):
# Remove partition numbers
devices.append(diskFromPartition(dev).replace('/', '!'))
else:
rawdev = diskFromPartition(dev)
devices = map(lambda x: os.path.realpath(x)[5:], scsiutil._genReverseSCSIidmap(rawdev.split('/')[-1]))
for d in devices:
path = "/sys/block/%s/queue/scheduler" % d
if not os.path.exists(path):
SMlog("no path %s" % path)
return
try:
f = open(path, 'w')
f.write("%s\n" % str)
f.close()
SMlog("Set scheduler to [%s] on dev [%s]" % (str,d))
except:
SMlog("Error setting scheduler to [%s] on dev [%s]" % (str,d))
pass
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):
__map_explicit(devices)
return
time.sleep(1)
__map_explicit(devices)
def set_scheduler(dev, str):
devices = []
if not scsiutil.match_dm(dev):
# Remove partition numbers
devices.append(diskFromPartition(dev).replace('/', '!'))
else:
rawdev = diskFromPartition(dev)
devices = map(lambda x: os.path.realpath(x)[5:],
scsiutil._genReverseSCSIidmap(rawdev.split('/')[-1]))
for d in devices:
path = "/sys/block/%s/queue/scheduler" % d
if not os.path.exists(path):
SMlog("no path %s" % path)
return
try:
f = open(path, 'w')
f.write("%s\n" % str)
f.close()
SMlog("Set scheduler to [%s] on dev [%s]" % (str, d))
except:
SMlog("Error setting scheduler to [%s] on dev [%s]" % (str, d))
pass
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):
__map_explicit(devices)
return
time.sleep(1)
__map_explicit(devices)
def get_TargetID_LunNUM(SCSIid):
devices = scsiutil._genReverseSCSIidmap(SCSIid)
cmd = [MPPGETAIDLNOBIN, devices[0]]
return util.pread2(cmd).split('\n')[0]
def get_TargetID_LunNUM(SCSIid):
devices = scsiutil._genReverseSCSIidmap(SCSIid)
cmd = [MPPGETAIDLNOBIN, devices[0]]
return util.pread2(cmd).split('\n')[0]
def add(scsi_id):
devices = scsiutil._genReverseSCSIidmap(scsi_id)
for device in devices:
realpath = os.path.realpath(device)
base = os.path.basename(realpath)
mpath_cli.add_path(base)
def add(scsi_id):
devices = scsiutil._genReverseSCSIidmap(scsi_id)
for device in devices:
realpath = os.path.realpath(device)
base = os.path.basename(realpath)
mpath_cli.add_path(base)
