def attach(dbg, uri, domain, cb):
sr, key = _parse_uri(uri)
opq = cb.volumeStartOperations(sr, 'r')
meta_path = cb.volumeMetadataGetPath(opq)
db = VHDMetabase(meta_path)
with db.write_context():
vdi = db.get_vdi_by_id(key)
# activate LVs chain here
db.close()
vol_path = cb.volumeGetPath(opq, str(vdi.vhd.id))
if vdi.vhd.parent_id is not None and vdi_enable_intellicache:
parent_vhd_path = cb.volumeGetPath(opq, str(vdi.vhd.parent_id))
block_device = IntelliCache.attach(
dbg,
vol_path,
parent_vhd_path
)
else:
tap = tapdisk.create(dbg)
tapdisk.save_tapdisk_metadata(dbg, vol_path, tap)
block_device = tap.block_device()
cb.volumeStopOperations(opq)
return {
'domain_uuid': '0',
'implementation': ['Tapdisk3', block_device],
}
def attach(self, dbg, uri, domain):
u = urlparse.urlparse(uri)
tap = tapdisk.create(dbg)
tapdisk.save_tapdisk_metadata(dbg, u.path, tap)
return {
'domain_uuid': '0',
'implementation': ['Tapdisk3', tap.block_device()],
}
def attach(self, dbg, uri, domain):
u = urlparse.urlparse(uri)
tap = tapdisk.create(dbg)
tapdisk.save_tapdisk_metadata(dbg, u.path, tap)
return {
'domain_uuid': '0',
'implementation': ['Tapdisk3', tap.block_device()],
}
def attach(dbg, uri, domain, cb):
sr,name = parse_datapath_uri(uri)
opq = cb.volumeStartOperations(sr, 'r')
# activate LVs chain here
vol_path = cb.volumeGetPath(opq, name)
tap = tapdisk.create(dbg)
tapdisk.save_tapdisk_metadata(dbg, vol_path, tap)
return {
'domain_uuid': '0',
'implementation': ['Tapdisk3', tap.block_device()],
}
def attach_internal(dbg, opq, vdi, vol_path, cb):
if vdi.volume.parent_id is not None and vdi_enable_intellicache:
parent_cow_path = cb.volumeGetPath(opq, str(vdi.volume.parent_id))
IntelliCache.attach(dbg, vol_path, parent_cow_path)
else:
tap = tapdisk.create(dbg)
tapdisk.save_tapdisk_metadata(
dbg, cb.get_data_metadata_path(opq, vdi.uuid), tap)
return [[
'XenDisk', {
'backend_type': 'vbd3',
'params': tap.block_device(),
'extra': {}
}
], ['BlockDevice', {
'path': tap.block_device()
}]]
def attach(dbg, vhd_path, parent_vhd_path):
log.debug("parent_vhd_path: {}".format(parent_vhd_path))
parent_vhd_cache_path = os.path.join(
IntelliCache.ROOT_PATH,
parent_vhd_path[20:] # remove /var/run/sr-mount, but keep the rest
) # TODO: 20 should be 18; the path starts with 2 extra slashes!!
log.debug("parent_vhd_cache_path: {}".format(parent_vhd_cache_path))
try:
os.makedirs(parent_vhd_cache_path.rsplit('/', 1)[0])
except OSError as exc:
if exc.errno != errno.EEXIST:
raise
# Only snapshot parent if it doesn't exist
if not os.path.isfile(parent_vhd_cache_path):
# ['/usr/bin/vhd-util', 'snapshot', '--debug',
# '-n', '/var/run/sr-mount/ext3_sr/base_img.vhdcache',
# '-p', '/var/run/sr-mount/nfs_sr/base_img.vhd']
log.debug("parent cache does not exist; snapshotting")
VHDUtil.snapshot(dbg, parent_vhd_cache_path, parent_vhd_path, False)
else:
log.debug("parent cache exists; no action")
leaf_vhd_cache_path = os.path.join(
IntelliCache.ROOT_PATH,
vhd_path[20:]
)
log.debug("leaf_vhd_cache_path: {}".format(leaf_vhd_cache_path))
try:
os.makedirs(leaf_vhd_cache_path.rsplit('/', 1)[0])
except OSError as exc:
if exc.errno != errno.EEXIST:
raise
try:
# Maybe deleting is redundant?
os.unlink(leaf_vhd_cache_path)
log.debug("leaf cache exists; deleting")
except OSError as exc:
if exc.errno == errno.ENOENT:
log.debug("leaf cache does not exist")
else:
raise
# ['/usr/bin/vhd-util', 'snapshot', '--debug',
# '-n', '/var/run/sr-mount/ext3_sr/leaf.vhdcache',
# '-p', '/var/run/sr-mount/ext3_sr/base_img.vhdcache',
# '-S', '24576', '-e']
log.debug("snapshotting leaf cache")
VHDUtil.snapshot(dbg, leaf_vhd_cache_path, parent_vhd_cache_path, True)
# HANDLE VDI RESIZING
try:
# See if 'parent_vhd_cache_path' exists
tapdisk.load_tapdisk_metadata('', parent_vhd_cache_path)
except IOError as exc:
if exc.errno == errno.ENOENT:
parent_cache_tap = tapdisk.create(
"create 'parent_cache_tap' tapdisk"
)
tapdisk.save_tapdisk_metadata(
'',
parent_vhd_cache_path,
parent_cache_tap
)
else:
raise
try:
# This should not exist
tapdisk.load_tapdisk_metadata('', leaf_vhd_cache_path)
except IOError as exc:
if exc.errno == errno.ENOENT:
leaf_cache_tap = tapdisk.create(
"create 'leaf_cache_tap' tapdisk"
)
tapdisk.save_tapdisk_metadata(
'',
leaf_vhd_cache_path,
leaf_cache_tap
)
else:
raise
else:
raise RuntimeError(
"Tapdisk metadata file for '{}' exists; Aborting".format(
leaf_vhd_cache_path
)
)
return leaf_cache_tap.block_device()
def attach(dbg, cow_path, parent_cow_path):
log.debug("parent_cow_path: {}".format(parent_cow_path))
parent_cow_cache_path = os.path.join(
IntelliCache.ROOT_PATH,
parent_cow_path[20:] # remove /var/run/sr-mount, but keep the rest
) # TODO: 20 should be 18; the path starts with 2 extra slashes!!
log.debug("parent_cow_cache_path: {}".format(parent_cow_cache_path))
try:
os.makedirs(parent_cow_cache_path.rsplit('/', 1)[0])
except OSError as exc:
if exc.errno != errno.EEXIST:
raise
# Only snapshot parent if it doesn't exist
if not os.path.isfile(parent_cow_cache_path):
# ['/usr/bin/vhd-util', 'snapshot', '--debug',
# '-n', '/var/run/sr-mount/ext3_sr/base_img.vhdcache',
# '-p', '/var/run/sr-mount/nfs_sr/base_img.vhd']
log.debug("parent cache does not exist; snapshotting")
COWUtil.snapshot(dbg, parent_cow_cache_path, parent_cow_path,
False)
else:
log.debug("parent cache exists; no action")
leaf_cow_cache_path = os.path.join(IntelliCache.ROOT_PATH,
cow_path[20:])
log.debug("leaf_cow_cache_path: {}".format(leaf_cow_cache_path))
try:
os.makedirs(leaf_cow_cache_path.rsplit('/', 1)[0])
except OSError as exc:
if exc.errno != errno.EEXIST:
raise
try:
# Maybe deleting is redundant?
os.unlink(leaf_cow_cache_path)
log.debug("leaf cache exists; deleting")
except OSError as exc:
if exc.errno == errno.ENOENT:
log.debug("leaf cache does not exist")
else:
raise
# ['/usr/bin/vhd-util', 'snapshot', '--debug',
# '-n', '/var/run/sr-mount/ext3_sr/leaf.vhdcache',
# '-p', '/var/run/sr-mount/ext3_sr/base_img.vhdcache',
# '-S', '24576', '-e']
log.debug("snapshotting leaf cache")
COWUtil.snapshot(dbg, leaf_cow_cache_path, parent_cow_cache_path, True)
# HANDLE VDI RESIZING
try:
# See if 'parent_cow_cache_path' exists
tapdisk.load_tapdisk_metadata('', parent_cow_cache_path)
except IOError as exc:
if exc.errno == errno.ENOENT:
parent_cache_tap = tapdisk.create(
"create 'parent_cache_tap' tapdisk")
tapdisk.save_tapdisk_metadata('', parent_cow_cache_path,
parent_cache_tap)
else:
raise
try:
# This should not exist
tapdisk.load_tapdisk_metadata('', leaf_cow_cache_path)
except IOError as exc:
if exc.errno == errno.ENOENT:
leaf_cache_tap = tapdisk.create(
"create 'leaf_cache_tap' tapdisk")
tapdisk.save_tapdisk_metadata('', leaf_cow_cache_path,
leaf_cache_tap)
else:
raise
else:
raise RuntimeError(
"Tapdisk metadata file for '{}' exists; Aborting".format(
leaf_cow_cache_path))
return leaf_cache_tap.block_device()
