def create(self, sr_uuid, vdi_uuid, size):
if not self.sr.isMaster:
util.SMlog('vdi_create blocked for non-master')
raise xs_errors.XenError('LVMMaster')
try:
mb = 1024L * 1024L
size_mb = (long(size) + mb - 1L) / mb # round up
# Rather than bailing out for small sizes, just round up to 1 MiB. The
# LVM code will round up to the nearest PE size anyway (probably 4 MiB)
if size_mb == 0:
size_mb = 1
if lvutil._checkLV(self.path):
raise xs_errors.XenError('VDIExists')
# Verify there's sufficient space for the VDI
stats = lvutil._getVGstats(self.sr.vgname)
freespace = stats['physical_size'] - stats['physical_utilisation']
if freespace < long(size):
raise xs_errors.XenError('SRNoSpace')
cmd = ["lvcreate", "-n", self.lvname, "-L", str(size_mb), \
self.sr.vgname]
text = util.pread2(cmd)
cmd = ["lvchange", "-an", self.path]
text = util.pread2(cmd)
self.size = lvutil._getLVsize(self.path)
self.utilisation = self.size
except util.CommandException, inst:
raise xs_errors.XenError('LVMCreate', \
opterr='lv operation failed error is %d' % inst.code)
def resize(self, sr_uuid, vdi_uuid, size):
if not self.sr.isMaster:
util.SMlog('vdi_resize blocked for non-master')
raise xs_errors.XenError('LVMMaster')
try:
self.size = lvutil._getLVsize(self.path)
except:
raise xs_errors.XenError('VDIUnavailable', \
opterr='no such VDI %s' % self.path)
size_mb = long(size) / (1024 * 1024)
try:
assert(size_mb >= self.size/(1024 * 1024))
if size == self.size:
self.size = lvutil._getLVsize(self.path)
self.utilisation = self.size
return super(LVMVDI, self).get_params()
# Verify there's sufficient space for the VDI
stats = lvutil._getVGstats(self.sr.vgname)
freespace = stats['physical_size'] - stats['physical_utilisation']
if freespace < long(size) - self.size:
raise xs_errors.XenError('SRNoSpace')
cmd = ["lvresize", "-L", str(size_mb), self.path]
text = util.pread2(cmd)
self.size = lvutil._getLVsize(self.path)
self.utilisation = self.size
self._db_update()
return super(LVMVDI, self).get_params()
except util.CommandException, inst:
raise xs_errors.XenError('LVMResize', \
opterr='lvresize failed error is %d' % inst.code)
