def __init__(self, filehandle):
self._objid = ObCacheId(filehandle)
if self._objid.bucketNameVersionIsV1():
self.prefix = "%08X_%s." % (fnv1_hash(self._objid.bytes), str(self._objid).upper())
self._name_version = 1
else:
self.prefix = "%016X_%s." % (hash64(self._objid), str(self._objid).upper())
self._name_version = 2
self.best_name = None
self.best_version = None
class ObjectListManager():
'''
Manage state for finding the newest object name
for an inode.
'''
def __init__(self, filehandle):
self._objid = ObCacheId(filehandle)
if self._objid.bucketNameVersionIsV1():
self.prefix = "%08X_%s." % (fnv1_hash(self._objid.bytes), str(self._objid).upper())
self._name_version = 1
else:
self.prefix = "%016X_%s." % (hash64(self._objid), str(self._objid).upper())
self._name_version = 2
self.best_name = None
self.best_version = None
def see_name(self, wrock, name):
'''
An object with the given name is observed.
'''
if not name.startswith(self.prefix):
wrock.logger.warning("%s see_name mismatch prefix '%s' does not match '%s'", wrock, self.prefix, name)
return
toks = name.split('.')
try:
name_version = int(toks[-1])
except ValueError:
wrock.logger.warning("%s cannot parse inode object name '%s'", wrock, name)
return
if name_version != self._name_version:
wrock.logger.warning("%s objid='%s' unexpected name_version '%s' != '%s' name='%s'", wrock, self._objid, name_version, self._name_version, name)
# we know how to parse this, so keep going
if name_version == 1:
if len(toks) != 4:
wrock.logger.warning("%s objid='%s' unexpected token count for name='%s'", wrock, self._objid, name)
return
version_str = toks[1]
elif name_version == 2:
if len(toks) != 6:
wrock.logger.warning("%s objid='%s' unexpected token count for name='%s'", wrock, self._objid, name)
return
version_str = toks[3]
else:
# OK, we do not know how to handle this
wrock.logger.warning("%s objid='%s' unhandled name_version=%s", wrock, self._objid, name_version)
return
try:
version = int(version_str)
except ValueError:
wrock.logger.warning("%s cannot parse version from object name '%s' version_str='%s'", wrock, name, version_str)
return
self._see_name_and_version(name, version)
def _see_name_and_version(self, name, version):
'''
Observe a new name at the given version
'''
if (self.best_version is None) or (version > self.best_version):
self.best_name = name
self.best_version = version
def generate_bucket_name(objId,
ownerObjId,
objType,
version=OBJ_VERSION_INITIAL,
nameprefix=None):
'''
Generate bucketnames given oid and owner obj id.
Special objects that are outside the filesystem tree have V1 names.
All other objects have V2 names
'''
if isinstance(objId, Filehandle):
objId = ObCacheId(objId)
if objId.bucketNameVersionIsV1():
nameVersion = 1
else:
nameVersion = 2
if objId.isRootId():
ownerObjId = objId
objType = Btype.BTYPE_DIR
if nameVersion == 1:
prefix = fnv1_hash(objId.bytes)
else:
prefix = hash64(objId)
parentHash = hash64(ownerObjId)
snapshotid = 0xFFFFFFFF
if nameVersion == 1:
name = "%08X_%s.%011u.%08X.%04u" % (prefix, str(objId).upper(),
version, snapshotid, nameVersion)
else:
name = "%016X_%s.%04u.%016X.%011u.%08X.%04u" % (prefix, objId.__str__(
).upper(), objType, parentHash, version, snapshotid, nameVersion)
if not nameprefix:
return name
return nameprefix + name
def unparse_indirect(run_options, tObj, blockList, treeIndex, depth):
ba = bytearray()
btypeList = get_unparse_handle_list(tObj.ftype, Btype.BTYPE_INDIRECT)
indirBlockId = ObCacheId()
offset = 0xFFFFFFFF & ((treeIndex << 16) + depth)
ba = unparse_obj_handles(run_options,
tObj,
ba,
indirBlockId,
objBtypeList=btypeList,
ownerFh=tObj.filehandle,
dataOffset=offset,
indirectBlockList=blockList)
return indirBlockId, ba
def unparse_segment(run_options, tobj, ftype, ownerfh, offset, data):
'pass owning object offset and data at offset'
segmentId = ObCacheId()
return segmentId, unparse_segment_using_obid(run_options, segmentId, tobj,
ftype, ownerfh, offset, data)