def getMetaDataMapping(cls, vgName, oldMapping={}):
firstDev, firstExtent = lvm.getFirstExt(vgName, sd.METADATA)
firstExtent = int(firstExtent)
if firstExtent != 0:
cls.log.error("INTERNAL: metadata ext is not 0")
raise se.MetaDataMappingError("vg %s: metadata extent is not the "
"first extent" % vgName)
pvlist = list(lvm.listPVNames(vgName))
pvlist.remove(firstDev)
pvlist.insert(0, firstDev)
cls.log.info("Create: SORT MAPPING: %s" % pvlist)
mapping = {}
devNum = len(oldMapping)
for dev in pvlist:
knownDev = False
for pvID, oldInfo in oldMapping.iteritems():
if os.path.basename(dev) == oldInfo["guid"]:
mapping[pvID] = oldInfo
knownDev = True
break
if knownDev:
continue
pv = lvm.getPV(dev)
pvInfo = {}
pvInfo["guid"] = os.path.basename(pv.name)
pvInfo["uuid"] = pv.uuid
# this is another trick, it's not the
# the pestart value you expect, it's just
# 0, always
pvInfo["pestart"] = 0
pvInfo["pecount"] = pv.pe_count
if devNum == 0:
mapOffset = 0
else:
prevDevNum = devNum - 1
try:
prevInfo = mapping["PV%d" % (prevDevNum,)]
except KeyError:
prevInfo = oldMapping["PV%d" % (prevDevNum,)]
mapOffset = int(prevInfo["mapoffset"]) + \
int(prevInfo["pecount"])
pvInfo["mapoffset"] = mapOffset
mapping["PV%d" % devNum] = pvInfo
devNum += 1
return mapping
def getMetaDataMapping(cls, vgName, oldMapping={}):
firstDev, firstExtent = lvm.getFirstExt(vgName, sd.METADATA)
firstExtent = int(firstExtent)
if firstExtent != 0:
cls.log.error("INTERNAL: metadata ext is not 0")
raise se.MetaDataMappingError("vg %s: metadata extent is not the "
"first extent" % vgName)
pvlist = list(lvm.listPVNames(vgName))
pvlist.remove(firstDev)
pvlist.insert(0, firstDev)
cls.log.info("Create: SORT MAPPING: %s" % pvlist)
mapping = {}
devNum = len(oldMapping)
for dev in pvlist:
knownDev = False
for pvID, oldInfo in oldMapping.iteritems():
if os.path.basename(dev) == oldInfo["guid"]:
mapping[pvID] = oldInfo
knownDev = True
break
if knownDev:
continue
pv = lvm.getPV(dev)
pvInfo = {}
pvInfo["guid"] = os.path.basename(pv.name)
pvInfo["uuid"] = pv.uuid
# this is another trick, it's not the
# the pestart value you expect, it's just
# 0, always
pvInfo["pestart"] = 0
pvInfo["pecount"] = pv.pe_count
if devNum == 0:
mapOffset = 0
else:
prevDevNum = devNum - 1
try:
prevInfo = mapping["PV%d" % (prevDevNum,)]
except KeyError:
prevInfo = oldMapping["PV%d" % (prevDevNum,)]
mapOffset = int(prevInfo["mapoffset"]) + \
int(prevInfo["pecount"])
pvInfo["mapoffset"] = mapOffset
mapping["PV%d" % devNum] = pvInfo
devNum += 1
return mapping
def getVolumeMetadataOffsetFromPvMapping(self, vol_name):
dev, ext = lvm.getFirstExt(self.sdUUID, vol_name)
self.log.debug("vol %s dev %s ext %s" % (vol_name, dev, ext))
for pv in self.readMetadataMapping().values():
self.log.debug("MAPOFFSET: pv %s -- dev %s ext %s" % (pv, dev, ext))
pestart = int(pv["pestart"])
pecount = int(pv["pecount"])
if (os.path.basename(dev) == pv["guid"] and
int(ext) in range(pestart, pestart + pecount)):
offs = int(ext) + int(pv["mapoffset"])
if offs < SD_METADATA_SIZE/sd.METASIZE:
raise se.MetaDataMappingError("domain %s: vol %s MD offset %s is bad - will overwrite SD's MD" % (self.sdUUID, vol_name, offs))
return offs
raise se.MetaDataMappingError("domain %s: can't map PV %s ext %s" % (self.sdUUID, dev, ext))
def getVolumeMetadataOffsetFromPvMapping(self, vol_name):
dev, ext = lvm.getFirstExt(self.sdUUID, vol_name)
self.log.debug("vol %s dev %s ext %s" % (vol_name, dev, ext))
for pv in self.readMetadataMapping().values():
self.log.debug("MAPOFFSET: pv %s -- dev %s ext %s" %
(pv, dev, ext))
pestart = int(pv["pestart"])
pecount = int(pv["pecount"])
if (os.path.basename(dev) == pv["guid"] and
int(ext) in range(pestart, pestart + pecount)):
offs = int(ext) + int(pv["mapoffset"])
if offs < SD_METADATA_SIZE / sd.METASIZE:
raise se.MetaDataMappingError(
"domain %s: vol %s MD offset %s is bad - will "
"overwrite SD's MD" % (self.sdUUID, vol_name, offs))
return offs
raise se.MetaDataMappingError("domain %s: can't map PV %s ext %s" %
(self.sdUUID, dev, ext))
