def VDIMetadataSize(type, virtualsize):
size = 0
if type == 'vhd':
size_mb = virtualsize / (1024 * 1024)
#Footer + footer copy + header + possible CoW parent locator fields
size = 3 * 1024
# BAT 4 Bytes per block segment
size += (size_mb / 2) * 4
size = util.roundup(512, size)
# BATMAP 1 bit per block segment
size += (size_mb / 2) / 8
size = util.roundup(4096, size)
# Segment bitmaps + Page align offsets
size += (size_mb / 2) * 4096
elif type == 'qcow':
# Header + extended header
size = 46 + 17
size = util.roundup(512, size)
# L1 table
size += (size_mb / 2) * 8
size = util.roundup(4096, size)
# L2 tables
size += (size_mb / 2) * 4096
return size
def VDIMetadataSize(type, virtualsize):
size = 0
if type == 'vhd':
size_mb = virtualsize / (1024 * 1024)
#Footer + footer copy + header + possible CoW parent locator fields
size = 3 * 1024
# BAT 4 Bytes per block segment
size += (size_mb / 2) * 4
size = util.roundup(512, size)
# BATMAP 1 bit per block segment
size += (size_mb / 2) / 8
size = util.roundup(4096, size)
# Segment bitmaps + Page align offsets
size += (size_mb / 2) * 4096
elif type == 'qcow':
# Header + extended header
size = 46 + 17
size = util.roundup(512, size)
# L1 table
size += (size_mb / 2) * 8
size = util.roundup(4096, size)
# L2 tables
size += (size_mb / 2) * 4096
return size
def cmd_write(self, ui,args):
"""write to flash"""
x = util.file_mem_args(ui, args, self.device)
if x is None:
return
(name, adr, n) = x
# check the file
filesize = util.file_arg(ui, name)
if filesize is None:
return
# round up the filesize - the io object will return 0xff for any bytes beyond EOF
filesize = util.roundup(filesize, 32)
if n is None:
# no length on the command line - program the filesize
n = filesize
if n >= filesize:
# region is bigger than the file - program the filesize
n = filesize
else:
# region is smaller than the file - truncate the file
ui.put('%s is larger than target memory: %d > %d bytes (truncating)\n' % (name, filesize, n))
# make sure the target region in flash is suitable
mr = mem.region(None, adr, n)
msg = self.driver.check_region(mr)
if msg is not None:
ui.put('%s\n' % msg)
return
# read from file, write to memory
mf = iobuf.read_file(ui, 'writing %s (%d bytes):' % (name, n), name, n)
self.driver.write(mr, mf)
mf.close(rate = True)
def create(self, sr_uuid, vdi_uuid, size):
if util.ioretry(lambda: util.pathexists(self.path)):
raise xs_errors.XenError('VDIExists')
overhead = 0
if self.vdi_type == vhdutil.VDI_TYPE_VHD:
overhead = vhdutil.calcOverheadFull(long(size))
# 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) < (long(size) + overhead):
raise xs_errors.XenError('SRNoSpace')
if self.vdi_type == vhdutil.VDI_TYPE_VHD:
try:
mb = 1024L * 1024L
size_mb = util.roundup(VHD_SIZE_INC, long(size)) / mb
if size_mb < 1 or (size_mb + (overhead / mb)) >= MAX_DISK_MB:
raise xs_errors.XenError('VDISize', opterr='VDI size ' + \
'must be between 1 MB and %d MB' % \
((MAX_DISK_MB - MAX_DISK_METADATA) - 1))
util.ioretry(lambda: self._create(str(size_mb), self.path))
self.size = util.ioretry(lambda: self._query_v(self.path))
except util.CommandException, inst:
raise xs_errors.XenError('VDICreate',
opterr='error %d' % inst.code)
def cmd_verify(self, ui, args):
"""verify memory against file"""
x = util.file_mem_args(ui, args, self.cpu.device)
if x is None:
return
(name, adr, size) = x
# check the file
filesize = util.file_arg(ui, name)
if filesize is None:
return
# round up the filesize - the io object will return 0xff for any bytes beyond EOF
filesize = util.roundup(filesize, 32)
if size is None:
# no length on the command line - verify the filesize
size = filesize
if size > filesize:
# region is larger than file - just verify the filesize
size = filesize
# adjust the address and length
adr = util.align(adr, 32)
n = util.nbytes_to_nwords(size, 32)
# read memory, verify against file object
mf = iobuf.verify_file(ui, 'verify %s (%d bytes):' % (name, n * 4), name, n * 4)
self.cpu.rdmem32(adr, n, mf)
mf.close()
def create(self, sr_uuid, vdi_uuid, size):
if util.ioretry(lambda: util.pathexists(self.path)):
raise xs_errors.XenError('VDIExists')
overhead = 0
if self.vdi_type == vhdutil.VDI_TYPE_VHD:
overhead = vhdutil.calcOverheadFull(long(size))
# 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) < (long(size) + overhead):
raise xs_errors.XenError('SRNoSpace')
if self.vdi_type == vhdutil.VDI_TYPE_VHD:
try:
mb = 1024L * 1024L
size_mb = util.roundup(VHD_SIZE_INC, long(size)) / mb
if size_mb < 1 or (size_mb + (overhead / mb)) >= MAX_DISK_MB:
raise xs_errors.XenError('VDISize', opterr='VDI size ' + \
'must be between 1 MB and %d MB' % \
((MAX_DISK_MB - MAX_DISK_METADATA) - 1))
util.ioretry(lambda: self._create(str(size_mb), self.path))
self.size = util.ioretry(lambda: self._query_v(self.path))
except util.CommandException, inst:
raise xs_errors.XenError('VDICreate',
opterr='error %d' % inst.code)
def cmd_verify(self, ui, args):
"""verify memory against file"""
x = util.file_mem_args(ui, args, self.cpu.device)
if x is None:
return
(name, adr, size) = x
# check the file
filesize = util.file_arg(ui, name)
if filesize is None:
return
# round up the filesize - the io object will return 0xff for any bytes beyond EOF
filesize = util.roundup(filesize, 32)
if size is None:
# no length on the command line - verify the filesize
size = filesize
if size > filesize:
# region is larger than file - just verify the filesize
size = filesize
# adjust the address and length
adr = util.align(adr, 32)
n = util.nbytes_to_nwords(size, 32)
# read memory, verify against file object
mf = iobuf.verify_file(ui, 'verify %s (%d bytes):' % (name, n * 4),
name, n * 4)
self.cpu.rdmem32(adr, n, mf)
mf.close()
def calcOverheadEmpty(virtual_size):
"""Calculate the VHD space overhead (metadata size) for an empty VDI of
size virtual_size"""
overhead = 0
size_mb = virtual_size / (1024 * 1024)
# Footer + footer copy + header + possible CoW parent locator fields
overhead = 3 * 1024
# BAT 4 Bytes per block segment
overhead += (size_mb / 2) * 4
overhead = util.roundup(512, overhead)
# BATMAP 1 bit per block segment
overhead += (size_mb / 2) / 8
overhead = util.roundup(4096, overhead)
return overhead
def calcOverheadEmpty(virtual_size):
"""Calculate the VHD space overhead (metadata size) for an empty VDI of
size virtual_size"""
overhead = 0
size_mb = virtual_size / (1024 * 1024)
# Footer + footer copy + header + possible CoW parent locator fields
overhead = 3 * 1024
# BAT 4 Bytes per block segment
overhead += (size_mb / 2) * 4
overhead = util.roundup(512, overhead)
# BATMAP 1 bit per block segment
overhead += (size_mb / 2) / 8
overhead = util.roundup(4096, overhead)
return overhead
def resize_online(self, sr_uuid, vdi_uuid, size):
if not self.exists:
raise xs_errors.XenError('VDIUnavailable', \
opterr='VDI %s unavailable %s' % (vdi_uuid, self.path))
if self.vdi_type != vhdutil.VDI_TYPE_VHD:
raise xs_errors.XenError('Unimplemented')
if self.hidden:
raise xs_errors.XenError('VDIUnavailable', opterr='hidden VDI')
if size < self.size:
util.SMlog('vdi_resize: shrinking not supported: ' + \
'(current size: %d, new size: %d)' % (self.size, size))
raise xs_errors.XenError('VDISize', opterr='shrinking not allowed')
if size == self.size:
return VDI.VDI.get_params(self)
# We already checked it is a VDI_TYPE_VHD
size = util.roundup(VHD_SIZE_INC, long(size))
overhead = vhdutil.calcOverheadFull(long(size))
# Check we are within the limits
mb = 1024L * 1024L
if size < mb or (size / mb) >= MAX_VHD_SIZE:
raise xs_errors.XenError('VDISize',
opterr='VDI size ' +
'must be between 1 MB and %d MB' %
(MAX_VHD_SIZE))
# Test the amount of actual disk space
if ENFORCE_VIRT_ALLOC:
self.sr._loadvdis()
reserved = self.sr.virtual_allocation
sr_size = self.sr._getsize()
delta = long(size - self.size)
if (sr_size - reserved) < delta:
raise xs_errors.XenError('SRNoSpace')
jFile = JOURNAL_FILE_PREFIX + self.uuid
try:
vhdutil.setSizeVirt(self.path, size, jFile)
except:
# Revert the operation
vhdutil.revert(self.path, jFile)
raise xs_errors.XenError('VDISize',
opterr='resize operation failed')
old_size = self.size
self.size = vhdutil.getSizeVirt(self.path)
st = util.ioretry(lambda: os.stat(self.path))
self.utilisation = long(st.st_size)
self._db_update()
self.sr._update(self.sr.uuid, self.size - old_size)
return VDI.VDI.get_params(self)
def resize_online(self, sr_uuid, vdi_uuid, size):
if not self.exists:
raise xs_errors.XenError('VDIUnavailable', \
opterr='VDI %s unavailable %s' % (vdi_uuid, self.path))
if self.vdi_type != vhdutil.VDI_TYPE_VHD:
raise xs_errors.XenError('Unimplemented')
if self.hidden:
raise xs_errors.XenError('VDIUnavailable', opterr='hidden VDI')
if size < self.size:
util.SMlog('vdi_resize: shrinking not supported: ' + \
'(current size: %d, new size: %d)' % (self.size, size))
raise xs_errors.XenError('VDISize', opterr='shrinking not allowed')
if size == self.size:
return VDI.VDI.get_params(self)
# We already checked it is a VDI_TYPE_VHD
size = util.roundup(VHD_SIZE_INC, long(size))
overhead = vhdutil.calcOverheadFull(long(size))
# Check we are within the limits
mb = 1024L * 1024L
if size < mb or (size / mb) >= MAX_VHD_SIZE:
raise xs_errors.XenError('VDISize', opterr='VDI size ' +
'must be between 1 MB and %d MB' %(MAX_VHD_SIZE))
# Test the amount of actual disk space
if ENFORCE_VIRT_ALLOC:
self.sr._loadvdis()
reserved = self.sr.virtual_allocation
sr_size = self.sr._getsize()
delta = long(size - self.size)
if (sr_size - reserved) < delta:
raise xs_errors.XenError('SRNoSpace')
jFile = JOURNAL_FILE_PREFIX + self.uuid
try:
vhdutil.setSizeVirt(self.path, size, jFile)
except:
# Revert the operation
vhdutil.revert(self.path, jFile)
raise xs_errors.XenError('VDISize', opterr='resize operation failed')
old_size = self.size
self.size = vhdutil.getSizeVirt(self.path)
st = util.ioretry(lambda: os.stat(self.path))
self.utilisation = long(st.st_size)
self._db_update()
self.sr._update(self.sr.uuid, self.size - old_size)
return VDI.VDI.get_params(self)
def validate_size(self, size):
if self.exists:
raise xs_errors.XenError('VDIExists')
if size / 1024 / 1024 > self.MAX_VDI_SIZE_MB:
raise xs_errors.XenError('VDISize',
opterr="VDI size cannot exceed %d MB" % \
self.MAX_VDI_SIZE_MB)
if size < self.MIN_VIRT_SIZE:
size = self.MIN_VIRT_SIZE
return util.roundup(self.VHD_SIZE_INC, size)
def validate_and_round_vhd_size(size):
""" Take the supplied vhd size, in bytes, and check it is positive and less
that the maximum supported size, rounding up to the next block boundary
"""
if (size < 0 or size > MAX_VHD_SIZE):
raise xs_errors.XenError('VDISize', opterr='VDI size ' + \
'must be between 1 MB and %d MB' % \
(MAX_VHD_SIZE / 1024 / 1024))
if (size < MIN_VHD_SIZE):
size = MIN_VHD_SIZE
size = util.roundup(VHD_BLOCK_SIZE, size)
return size
def validate_and_round_vhd_size(size):
""" Take the supplied vhd size, in bytes, and check it is positive and less
that the maximum supported size, rounding up to the next block boundary
"""
if (size < 0 or size > MAX_VHD_SIZE):
raise xs_errors.XenError('VDISize', opterr='VDI size ' + \
'must be between 1 MB and %d MB' % \
(MAX_VHD_SIZE / 1024 / 1024))
if (size < MIN_VHD_SIZE):
size = MIN_VHD_SIZE
size = util.roundup(VHD_BLOCK_SIZE, size)
return size
def create(size, path):
assert (type(size) == type(0L))
overhead = calcOverheadFull(size)
mb = 1024L * 1024L
size_mb = util.roundup(VHD_SIZE_INC, size) / mb
if size_mb < 1 or (size_mb + (overhead / mb)) >= MAX_DISK_MB:
raise 'VDI size must be between 1 MB and %d MB' % ((MAX_DISK_MB - MAX_DISK_METADATA) - 1)
cmd = [TAPDISK_UTIL, "create", "vhd", str(size_mb), path]
ioretry(cmd)
cmd = [TAPDISK_UTIL, "query", "vhd", "-v", path]
return long(ioretry(cmd)) * mb
def resize_online(self, sr_uuid, vdi_uuid, size):
if not self.exists:
raise xs_errors.XenError('VDIUnavailable', \
opterr='VDI %s unavailable %s' % (vdi_uuid, self.path))
if self.hidden:
raise xs_errors.XenError('VDIUnavailable', opterr='hidden VDI')
if size < self.size:
util.SMlog('vdi_resize: shrinking not supported: ' + \
'(current size: %d, new size: %d)' % (self.size, size))
raise xs_errors.XenError('VDISize', opterr='shrinking not allowed')
if size == self.size:
return VDI.VDI.get_params(self)
size = util.roundup(VHD_SIZE_INC, long(size))
# Test the amount of actual disk space
if ENFORCE_VIRT_ALLOC:
self.sr._loadvdis()
reserved = self.sr.virtual_allocation
sr_size = self.sr._getsize()
delta = long(size - self.size)
if (sr_size - reserved) < delta:
raise xs_errors.XenError('SRNoSpace')
jFile = JOURNAL_FILE_PREFIX + self.uuid
try:
vhdutil.setSizeVirt(self.path, size, jFile)
except:
# Revert the operation
vhdutil.revert(self.path, jFile)
raise xs_errors.XenError('VDISize', opterr='resize operation failed')
old_size = self.size
self.size = vhdutil.getSizeVirt(self.path)
st = util.ioretry(lambda: os.stat(self.path))
self.utilisation = long(st.st_size)
self._db_update()
self.sr._update(self.sr.uuid, self.size - old_size)
return VDI.VDI.get_params(self)
def create(self, sr_uuid, vdi_uuid, size):
if util.ioretry(lambda: util.pathexists(self.path)):
raise xs_errors.XenError('VDIExists')
# 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) < \
(long(size) + vhdutil.calcOverheadFull(long(size))):
raise xs_errors.XenError('SRNoSpace')
try:
mb = 1024L * 1024L
size_mb = util.roundup(VHD_SIZE_INC, long(size)) / mb # round up
metasize = vhdutil.calcOverheadFull(long(size))
assert(size_mb > 0)
assert((size_mb + (metasize/(1024*1024))) < MAX_DISK_MB)
util.ioretry(lambda: self._create(str(size_mb), self.path))
self.size = util.ioretry(lambda: self._query_v(self.path))
except util.CommandException, inst:
raise xs_errors.XenError('VDICreate', opterr='error %d' % inst.code)
def resize(self, sr_uuid, vdi_uuid, size):
# Updates the size in the DB
log("Calling VDI RESIZE")
util.SMlog("LUVDI.resize for %s" % self.uuid)
if size / 1024 / 1024 > self.MAX_VDI_SIZE_MB:
raise xs_errors.XenError('VDISize',
opterr="VDI size cannot exceed %d MB" % \
self.MAX_VDI_SIZE_MB)
if size < self.size:
util.SMlog('vdi_resize: shrinking not supported: ' + \
'(current size: %d, new size: %d)' % (self.size, size))
raise xs_errors.XenError('VDISize', opterr='shrinking not allowed')
if size == self.size:
return VDI.VDI.get_params(self)
size = util.roundup(self.VHD_SIZE_INC, size)
old_size = self.size
if not self.attached:
self.attach(sr_uuid, vdi_uuid)
vhdutil.setSizeVirtFast(self.path, size)
self.size = vhdutil.getSizeVirt(self.path)
self.utilisation = self.size
vdi_ref = self.sr.srcmd.params['vdi_ref']
self.session.xenapi.VDI.set_virtual_size(vdi_ref, str(self.size))
self.session.xenapi.VDI.set_physical_utilisation(vdi_ref, str(self.size))
self.sr._updateStats(self.sr.uuid, self.size - old_size)
self.detach(sr_uuid, vdi_uuid)
return VDI.VDI.get_params(self)
def calcSizeLV(sizeVHD):
return util.roundup(LVM_SIZE_INCREMENT, sizeVHD)
def getSizeLV(size):
""" Rounds up the size."""
return util.roundup(lvutil.LVM_SIZE_INCREMENT, size)
def calcSizeLV(sizeVHD):
return util.roundup(LVM_SIZE_INCREMENT, sizeVHD)
def getSizeLV(size):
return util.roundup(lvutil.LVM_SIZE_INCREMENT, size)
