def print_LUNs(self):
self.LUNs = {}
if os.path.exists(self.path):
dom0_disks = util.dom0_disks()
for file in util.listdir(self.path):
if file.find("LUN") != -1 and file.find("_") == -1:
vdi_path = os.path.join(self.path, file)
if os.path.realpath(vdi_path) in dom0_disks:
util.SMlog("Hide dom0 boot disk LUN")
else:
LUNid = file.replace("LUN", "")
obj = self.vdi(self.uuid)
obj._query(vdi_path, LUNid)
self.LUNs[obj.uuid] = obj
def print_LUNs(self):
self.LUNs = {}
if os.path.exists(self.path):
dom0_disks = util.dom0_disks()
for file in util.listdir(self.path):
if file.find("LUN") != -1 and file.find("_") == -1:
vdi_path = os.path.join(self.path,file)
if os.path.realpath(vdi_path) in dom0_disks:
util.SMlog("Hide dom0 boot disk LUN")
else:
LUNid = file.replace("LUN","")
obj = self.vdi(self.uuid)
obj._query(vdi_path, LUNid)
self.LUNs[obj.uuid] = obj
def block_setscheduler(self, dev):
try:
realdev = os.path.realpath(dev)
disk = util.diskFromPartition(realdev)
# the normal case: the sr default scheduler (typically noop),
# potentially overridden by SR.other_config:scheduler
other_config = self.session.xenapi.SR.get_other_config(self.sr_ref)
sched = other_config.get('scheduler')
if not sched:
sched = self.sched
# special case: CFQ if the underlying disk holds dom0's file systems.
if disk in util.dom0_disks():
sched = 'cfq'
util.SMlog("Block scheduler: %s (%s) wants %s" % (dev, disk, sched))
util.set_scheduler(realdev[5:], sched)
except Exception, e:
util.SMlog("Failed to set block scheduler on %s: %s" % (dev, e))
def block_setscheduler(self, dev):
try:
realdev = os.path.realpath(dev)
disk = util.diskFromPartition(realdev)
# the normal case: the sr default scheduler (typically noop),
# potentially overridden by SR.other_config:scheduler
other_config = self.session.xenapi.SR.get_other_config(self.sr_ref)
sched = other_config.get('scheduler')
if not sched:
sched = self.sched
# special case: CFQ if the underlying disk holds dom0's file systems.
if disk in util.dom0_disks():
sched = 'cfq'
util.SMlog("Block scheduler: %s (%s) wants %s" % (dev, disk, sched))
util.set_scheduler(realdev[5:], sched)
except Exception, e:
util.SMlog("Failed to set block scheduler on %s: %s" % (dev, e))
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
