def clean_segment(self):
segment = Segment.SegmentClass(self.next_segment_to_clean)
for i in range(0, NUMBLOCKS):
blockidtocheck = segment.segmentbase + 1 + i
data = Disk.disk.blockread(blockidtocheck)
data = data[BLOCKSIZE:]
inodeid, blockoffset = struct.unpack("II", data)
if not self._is_valid(inodeid, blockoffset):
continue
inodeblockid = InodeMap.inodemap.lookup(inodeid)
if inodeblockid == None:
segment.superblock.blockinuse[i] = False
if DEBUG:
print "Cleaner cleaned :", blockidtocheck
else:
if blockoffset != INODEIDENTIFIEROFFSET:
inodeobject = Inode(
str=Segment.segmentmanager.blockread(inodeblockid))
if blockoffset == INDIRECTBLOCKOFFSET:
if inodeobject.indirectblock != blockidtocheck:
segment.superblock.blockinuse[i] = False
if DEBUG:
print "Cleaner cleaned :", blockidtocheck
else:
storedblockid = inodeobject.find_datablock_by_offset(
blockoffset)
if storedblockid != blockidtocheck:
segment.superblock.blockinuse[i] = False
if DEBUG:
print "Cleaner cleaned :", blockidtocheck
else:
if inodeblockid != blockidtocheck:
segment.superblock.blockinuse[i] = False
if DEBUG:
print "Cleaner cleaned :", blockidtocheck
