def clone(self, sr_uuid, vdi_uuid):
dest = util.gen_uuid ()
args = []
args.append("vdi_clone")
args.append(sr_uuid)
args.append(vdi_uuid)
args.append(dest)
if self.hidden:
raise xs_errors.XenError('VDIClone', opterr='hidden VDI')
depth = vhdutil.getDepth(self.path)
if depth == -1:
raise xs_errors.XenError('VDIUnavailable', \
opterr='failed to get VHD depth')
elif depth >= vhdutil.MAX_CHAIN_SIZE:
raise xs_errors.XenError('SnapshotChainTooLong')
# Test the amount of actual disk space
if ENFORCE_VIRT_ALLOC:
self.sr._loadvdis()
reserved = self.sr.virtual_allocation
sr_size = self.sr._getsize()
if (sr_size - reserved) < \
((self.size + VDI.VDIMetadataSize(SR.DEFAULT_TAP, self.size))*2):
raise xs_errors.XenError('SRNoSpace')
newuuid = util.gen_uuid()
src = self.path
dst = os.path.join(self.sr.path, "%s.%s" % (dest,self.vdi_type))
newsrc = os.path.join(self.sr.path, "%s.%s" % (newuuid,self.vdi_type))
newsrcname = "%s.%s" % (newuuid,self.vdi_type)
if not self._checkpath(src):
raise xs_errors.XenError('VDIUnavailable', \
opterr='VDI %s unavailable %s' % (vdi_uuid, src))
# wkcfix: multiphase
util.start_log_entry(self.sr.path, self.path, args)
# We assume the filehandle has been released
try:
try:
util.ioretry(lambda: os.rename(src,newsrc))
except util.CommandException, inst:
if inst.code != errno.ENOENT:
# failed to rename, simply raise error
util.end_log_entry(self.sr.path, self.path, ["error"])
raise
try:
util.ioretry(lambda: self._dualsnap(src, dst, newsrcname))
# mark the original file (in this case, its newsrc)
# as hidden so that it does not show up in subsequent scans
util.ioretry(lambda: self._mark_hidden(newsrc))
except util.CommandException, inst:
if inst.code != errno.EIO:
raise
def _snapshot(self, snap_type):
util.SMlog("FileVDI._snapshot for %s (type %s)" %
(self.uuid, snap_type))
args = []
args.append("vdi_clone")
args.append(self.sr.uuid)
args.append(self.uuid)
dest = None
dst = None
if snap_type == self.SNAPSHOT_DOUBLE:
dest = util.gen_uuid()
dst = os.path.join(self.sr.path, "%s.%s" % (dest, self.vdi_type))
args.append(dest)
if self.hidden:
raise xs_errors.XenError('VDIClone', opterr='hidden VDI')
depth = vhdutil.getDepth(self.path)
if depth == -1:
raise xs_errors.XenError('VDIUnavailable', \
opterr='failed to get VHD depth')
elif depth >= vhdutil.MAX_CHAIN_SIZE:
raise xs_errors.XenError('SnapshotChainTooLong')
# Test the amount of actual disk space
if ENFORCE_VIRT_ALLOC:
self.sr._loadvdis()
reserved = self.sr.virtual_allocation
sr_size = self.sr._getsize()
num_vdis = 2
if snap_type == self.SNAPSHOT_SINGLE:
num_vdis = 1
if (sr_size - reserved) < ((self.size + VDI.VDIMetadataSize( \
vhdutil.VDI_TYPE_VHD, self.size)) * num_vdis):
raise xs_errors.XenError('SRNoSpace')
newuuid = util.gen_uuid()
src = self.path
newsrc = os.path.join(self.sr.path, "%s.%s" % (newuuid, self.vdi_type))
newsrcname = "%s.%s" % (newuuid, self.vdi_type)
if not self._checkpath(src):
raise xs_errors.XenError('VDIUnavailable', \
opterr='VDI %s unavailable %s' % (self.uuid, src))
# wkcfix: multiphase
util.start_log_entry(self.sr.path, self.path, args)
# We assume the filehandle has been released
try:
try:
util.ioretry(lambda: os.rename(src, newsrc))
except util.CommandException, inst:
if inst.code != errno.ENOENT:
# failed to rename, simply raise error
util.end_log_entry(self.sr.path, self.path, ["error"])
raise
try:
util.ioretry(lambda: self._snap(src, newsrcname))
if snap_type == self.SNAPSHOT_DOUBLE:
util.ioretry(lambda: self._snap(dst, newsrcname))
# mark the original file (in this case, its newsrc)
# as hidden so that it does not show up in subsequent scans
util.ioretry(lambda: self._mark_hidden(newsrc))
except util.CommandException, inst:
if inst.code != errno.EIO:
raise
def _snapshot(self, snap_type, cbtlog=None, cbt_consistency=None):
util.SMlog("FileVDI._snapshot for %s (type %s)" %
(self.uuid, snap_type))
args = []
args.append("vdi_clone")
args.append(self.sr.uuid)
args.append(self.uuid)
dest = None
dst = None
if snap_type == VDI.SNAPSHOT_DOUBLE:
dest = util.gen_uuid()
dst = os.path.join(self.sr.path, "%s.%s" % (dest, self.vdi_type))
args.append(dest)
if self.hidden:
raise xs_errors.XenError('VDIClone', opterr='hidden VDI')
depth = vhdutil.getDepth(self.path)
if depth == -1:
raise xs_errors.XenError('VDIUnavailable', \
opterr='failed to get VHD depth')
elif depth >= vhdutil.MAX_CHAIN_SIZE:
raise xs_errors.XenError('SnapshotChainTooLong')
# Test the amount of actual disk space
if ENFORCE_VIRT_ALLOC:
self.sr._loadvdis()
reserved = self.sr.virtual_allocation
sr_size = self.sr._getsize()
num_vdis = 2
if (snap_type == VDI.SNAPSHOT_SINGLE
or snap_type == VDI.SNAPSHOT_INTERNAL):
num_vdis = 1
if (sr_size - reserved) < ((self.size + VDI.VDIMetadataSize( \
vhdutil.VDI_TYPE_VHD, self.size)) * num_vdis):
raise xs_errors.XenError('SRNoSpace')
newuuid = util.gen_uuid()
src = self.path
newsrc = os.path.join(self.sr.path, "%s.%s" % (newuuid, self.vdi_type))
newsrcname = "%s.%s" % (newuuid, self.vdi_type)
if not self._checkpath(src):
raise xs_errors.XenError('VDIUnavailable', \
opterr='VDI %s unavailable %s' % (self.uuid, src))
# wkcfix: multiphase
util.start_log_entry(self.sr.path, self.path, args)
# We assume the filehandle has been released
try:
util.ioretry(lambda: os.rename(src, newsrc))
# Create the snapshot under a temporary name, then rename
# it afterwards. This avoids a small window where it exists
# but is invalid. We do not need to do this for
# snap_type == VDI.SNAPSHOT_DOUBLE because dst never existed
# before so nobody will try to query it.
tmpsrc = "%s.%s" % (src, "new")
util.ioretry(lambda: self._snap(tmpsrc, newsrcname))
util.ioretry(lambda: os.rename(tmpsrc, src))
if snap_type == VDI.SNAPSHOT_DOUBLE:
util.ioretry(lambda: self._snap(dst, newsrcname))
# mark the original file (in this case, its newsrc)
# as hidden so that it does not show up in subsequent scans
util.ioretry(lambda: self._mark_hidden(newsrc))
#Verify parent locator field of both children and delete newsrc if unused
introduce_parent = True
try:
srcparent = util.ioretry(lambda: self._query_p_uuid(src))
dstparent = None
if snap_type == VDI.SNAPSHOT_DOUBLE:
dstparent = util.ioretry(lambda: self._query_p_uuid(dst))
if srcparent != newuuid and \
(snap_type == VDI.SNAPSHOT_SINGLE or \
snap_type == VDI.SNAPSHOT_INTERNAL or \
dstparent != newuuid):
util.ioretry(lambda: os.unlink(newsrc))
introduce_parent = False
except:
pass
# Introduce the new VDI records
leaf_vdi = None
if snap_type == VDI.SNAPSHOT_DOUBLE:
leaf_vdi = VDI.VDI(self.sr, dest) # user-visible leaf VDI
leaf_vdi.read_only = False
leaf_vdi.location = dest
leaf_vdi.size = self.size
leaf_vdi.utilisation = self.utilisation
leaf_vdi.sm_config = {}
leaf_vdi.sm_config['vhd-parent'] = dstparent
# If the parent is encrypted set the key_hash
# for the new snapshot disk
vdi_ref = self.sr.srcmd.params['vdi_ref']
sm_config = self.session.xenapi.VDI.get_sm_config(vdi_ref)
if "key_hash" in sm_config:
leaf_vdi.sm_config['key_hash'] = sm_config['key_hash']
# If we have CBT enabled on the VDI,
# set CBT status for the new snapshot disk
if cbtlog:
leaf_vdi.cbt_enabled = True
base_vdi = None
if introduce_parent:
base_vdi = VDI.VDI(self.sr, newuuid) # readonly parent
base_vdi.label = "base copy"
base_vdi.read_only = True
base_vdi.location = newuuid
base_vdi.size = self.size
base_vdi.utilisation = self.utilisation
base_vdi.sm_config = {}
grandparent = util.ioretry(lambda: self._query_p_uuid(newsrc))
if grandparent.find("no parent") == -1:
base_vdi.sm_config['vhd-parent'] = grandparent
try:
if snap_type == VDI.SNAPSHOT_DOUBLE:
leaf_vdi_ref = leaf_vdi._db_introduce()
util.SMlog("vdi_clone: introduced VDI: %s (%s)" % \
(leaf_vdi_ref,dest))
if introduce_parent:
base_vdi_ref = base_vdi._db_introduce()
self.session.xenapi.VDI.set_managed(base_vdi_ref, False)
util.SMlog("vdi_clone: introduced VDI: %s (%s)" %
(base_vdi_ref, newuuid))
vdi_ref = self.sr.srcmd.params['vdi_ref']
sm_config = self.session.xenapi.VDI.get_sm_config(vdi_ref)
sm_config['vhd-parent'] = srcparent
self.session.xenapi.VDI.set_sm_config(vdi_ref, sm_config)
except Exception, e:
util.SMlog(
"vdi_clone: caught error during VDI.db_introduce: %s" %
(str(e)))
# Note it's too late to actually clean stuff up here: the base disk has
# been marked as deleted already.
util.end_log_entry(self.sr.path, self.path, ["error"])
raise
except util.CommandException, inst:
# XXX: it might be too late if the base disk has been marked as deleted!
self._clonecleanup(src, dst, newsrc)
util.end_log_entry(self.sr.path, self.path, ["error"])
raise xs_errors.XenError('VDIClone',
opterr='VDI clone failed error %d' %
inst.code)
def _snapshot(self, snap_type, cbtlog=None, cbt_consistency=None):
util.SMlog("FileVDI._snapshot for %s (type %s)" % (self.uuid, snap_type))
args = []
args.append("vdi_clone")
args.append(self.sr.uuid)
args.append(self.uuid)
dest = None
dst = None
if snap_type == VDI.SNAPSHOT_DOUBLE:
dest = util.gen_uuid()
dst = os.path.join(self.sr.path, "%s.%s" % (dest,self.vdi_type))
args.append(dest)
if self.hidden:
raise xs_errors.XenError('VDIClone', opterr='hidden VDI')
depth = vhdutil.getDepth(self.path)
if depth == -1:
raise xs_errors.XenError('VDIUnavailable', \
opterr='failed to get VHD depth')
elif depth >= vhdutil.MAX_CHAIN_SIZE:
raise xs_errors.XenError('SnapshotChainTooLong')
# Test the amount of actual disk space
if ENFORCE_VIRT_ALLOC:
self.sr._loadvdis()
reserved = self.sr.virtual_allocation
sr_size = self.sr._getsize()
num_vdis = 2
if (snap_type == VDI.SNAPSHOT_SINGLE or snap_type == VDI.SNAPSHOT_INTERNAL):
num_vdis = 1
if (sr_size - reserved) < ((self.size + VDI.VDIMetadataSize( \
vhdutil.VDI_TYPE_VHD, self.size)) * num_vdis):
raise xs_errors.XenError('SRNoSpace')
newuuid = util.gen_uuid()
src = self.path
newsrc = os.path.join(self.sr.path, "%s.%s" % (newuuid,self.vdi_type))
newsrcname = "%s.%s" % (newuuid,self.vdi_type)
if not self._checkpath(src):
raise xs_errors.XenError('VDIUnavailable', \
opterr='VDI %s unavailable %s' % (self.uuid, src))
# wkcfix: multiphase
util.start_log_entry(self.sr.path, self.path, args)
# We assume the filehandle has been released
try:
util.ioretry(lambda: os.rename(src,newsrc))
# Create the snapshot under a temporary name, then rename
# it afterwards. This avoids a small window where it exists
# but is invalid. We do not need to do this for
# snap_type == VDI.SNAPSHOT_DOUBLE because dst never existed
# before so nobody will try to query it.
tmpsrc = "%s.%s" % (src, "new")
util.ioretry(lambda: self._snap(tmpsrc, newsrcname))
util.ioretry(lambda: os.rename(tmpsrc, src))
if snap_type == VDI.SNAPSHOT_DOUBLE:
util.ioretry(lambda: self._snap(dst, newsrcname))
# mark the original file (in this case, its newsrc)
# as hidden so that it does not show up in subsequent scans
util.ioretry(lambda: self._mark_hidden(newsrc))
#Verify parent locator field of both children and delete newsrc if unused
introduce_parent = True
try:
srcparent = util.ioretry(lambda: self._query_p_uuid(src))
dstparent = None
if snap_type == VDI.SNAPSHOT_DOUBLE:
dstparent = util.ioretry(lambda: self._query_p_uuid(dst))
if srcparent != newuuid and \
(snap_type == VDI.SNAPSHOT_SINGLE or \
snap_type == VDI.SNAPSHOT_INTERNAL or \
dstparent != newuuid):
util.ioretry(lambda: os.unlink(newsrc))
introduce_parent = False
except:
pass
# Introduce the new VDI records
leaf_vdi = None
if snap_type == VDI.SNAPSHOT_DOUBLE:
leaf_vdi = VDI.VDI(self.sr, dest) # user-visible leaf VDI
leaf_vdi.read_only = False
leaf_vdi.location = dest
leaf_vdi.size = self.size
leaf_vdi.utilisation = self.utilisation
leaf_vdi.sm_config = {}
leaf_vdi.sm_config['vhd-parent'] = dstparent
# If the parent is encrypted set the key_hash
# for the new snapshot disk
vdi_ref = self.sr.srcmd.params['vdi_ref']
sm_config = self.session.xenapi.VDI.get_sm_config(vdi_ref)
if "key_hash" in sm_config:
leaf_vdi.sm_config['key_hash'] = sm_config['key_hash']
# If we have CBT enabled on the VDI,
# set CBT status for the new snapshot disk
if cbtlog:
leaf_vdi.cbt_enabled = True
base_vdi = None
if introduce_parent:
base_vdi = VDI.VDI(self.sr, newuuid) # readonly parent
base_vdi.label = "base copy"
base_vdi.read_only = True
base_vdi.location = newuuid
base_vdi.size = self.size
base_vdi.utilisation = self.utilisation
base_vdi.sm_config = {}
grandparent = util.ioretry(lambda: self._query_p_uuid(newsrc))
if grandparent.find("no parent") == -1:
base_vdi.sm_config['vhd-parent'] = grandparent
try:
if snap_type == VDI.SNAPSHOT_DOUBLE:
leaf_vdi_ref = leaf_vdi._db_introduce()
util.SMlog("vdi_clone: introduced VDI: %s (%s)" % \
(leaf_vdi_ref,dest))
if introduce_parent:
base_vdi_ref = base_vdi._db_introduce()
self.session.xenapi.VDI.set_managed(base_vdi_ref, False)
util.SMlog("vdi_clone: introduced VDI: %s (%s)" % (base_vdi_ref,newuuid))
vdi_ref = self.sr.srcmd.params['vdi_ref']
sm_config = self.session.xenapi.VDI.get_sm_config(vdi_ref)
sm_config['vhd-parent'] = srcparent
self.session.xenapi.VDI.set_sm_config(vdi_ref, sm_config)
except Exception, e:
util.SMlog("vdi_clone: caught error during VDI.db_introduce: %s" % (str(e)))
# Note it's too late to actually clean stuff up here: the base disk has
# been marked as deleted already.
util.end_log_entry(self.sr.path, self.path, ["error"])
raise
except util.CommandException, inst:
# XXX: it might be too late if the base disk has been marked as deleted!
self._clonecleanup(src,dst,newsrc)
util.end_log_entry(self.sr.path, self.path, ["error"])
raise xs_errors.XenError('VDIClone',
opterr='VDI clone failed error %d' % inst.code)
def _snapshot(self, snap_type):
util.SMlog("FileVDI._snapshot for %s (type %s)" % (self.uuid, snap_type))
args = []
args.append("vdi_clone")
args.append(self.sr.uuid)
args.append(self.uuid)
dest = None
dst = None
if snap_type == self.SNAPSHOT_DOUBLE:
dest = util.gen_uuid()
dst = os.path.join(self.sr.path, "%s.%s" % (dest, self.vdi_type))
args.append(dest)
if self.hidden:
raise xs_errors.XenError("VDIClone", opterr="hidden VDI")
depth = vhdutil.getDepth(self.path)
if depth == -1:
raise xs_errors.XenError("VDIUnavailable", opterr="failed to get VHD depth")
elif depth >= vhdutil.MAX_CHAIN_SIZE:
raise xs_errors.XenError("SnapshotChainTooLong")
# Test the amount of actual disk space
if ENFORCE_VIRT_ALLOC:
self.sr._loadvdis()
reserved = self.sr.virtual_allocation
sr_size = self.sr._getsize()
num_vdis = 2
if snap_type == self.SNAPSHOT_SINGLE or snap_type == self.SNAPSHOT_INTERNAL:
num_vdis = 1
if (sr_size - reserved) < ((self.size + VDI.VDIMetadataSize(vhdutil.VDI_TYPE_VHD, self.size)) * num_vdis):
raise xs_errors.XenError("SRNoSpace")
newuuid = util.gen_uuid()
src = self.path
newsrc = os.path.join(self.sr.path, "%s.%s" % (newuuid, self.vdi_type))
newsrcname = "%s.%s" % (newuuid, self.vdi_type)
if not self._checkpath(src):
raise xs_errors.XenError("VDIUnavailable", opterr="VDI %s unavailable %s" % (self.uuid, src))
# wkcfix: multiphase
util.start_log_entry(self.sr.path, self.path, args)
# We assume the filehandle has been released
try:
try:
util.ioretry(lambda: os.rename(src, newsrc))
except util.CommandException, inst:
if inst.code != errno.ENOENT:
# failed to rename, simply raise error
util.end_log_entry(self.sr.path, self.path, ["error"])
raise
try:
util.ioretry(lambda: self._snap(src, newsrcname))
if snap_type == self.SNAPSHOT_DOUBLE:
util.ioretry(lambda: self._snap(dst, newsrcname))
# mark the original file (in this case, its newsrc)
# as hidden so that it does not show up in subsequent scans
util.ioretry(lambda: self._mark_hidden(newsrc))
except util.CommandException, inst:
if inst.code != errno.EIO:
raise