@@ -62,3 +62,21 @@ reserved32 0
bitmap_directory_size 0x40
bitmap_directory_offset 0x9d0000
+Bitmap name bitmap-1
+bitmap_table_offset 0x9b0000
+bitmap_table_size 1
+flags 0x2 (['auto'])
+type 1
+granularity_bits 15
+name_size 8
+extra_data_size 0
+
+Bitmap name bitmap-2
+bitmap_table_offset 0x9c0000
+bitmap_table_size 1
+flags 0x0 ([])
+type 1
+granularity_bits 16
+name_size 8
+extra_data_size 0
+
@@ -134,6 +134,53 @@ class Qcow2BitmapExt(Qcow2Struct):
tail = struct.calcsize(self.fmt) % 8
if tail:
fd.seek(8 - tail, 1)
+ position = fd.tell()
+ self.read_bitmap_directory(fd)
+ fd.seek(position)
+
+ def read_bitmap_directory(self, fd):
+ fd.seek(self.bitmap_directory_offset)
+ self.bitmap_directory = \
+ [Qcow2BitmapDirEntry(fd) for _ in range(self.nb_bitmaps)]
+
+ def dump(self):
+ super().dump()
+ for entry in self.bitmap_directory:
+ print()
+ entry.dump()
+
+
+class Qcow2BitmapDirEntry(Qcow2Struct):
+
+ fields = (
+ ('u64', '{:#x}', 'bitmap_table_offset'),
+ ('u32', '{}', 'bitmap_table_size'),
+ ('u32', BitmapFlags, 'flags'),
+ ('u8', '{}', 'type'),
+ ('u8', '{}', 'granularity_bits'),
+ ('u16', '{}', 'name_size'),
+ ('u32', '{}', 'extra_data_size')
+ )
+
+ def __init__(self, fd):
+ super().__init__(fd=fd)
+ # Seek relative to the current position in the file
+ fd.seek(self.extra_data_size, 1)
+ bitmap_name = fd.read(self.name_size)
+ self.name = bitmap_name.decode('ascii')
+ # Move position to the end of the entry in the directory
+ entry_raw_size = self.bitmap_dir_entry_raw_size()
+ padding = ((entry_raw_size + 7) & ~7) - entry_raw_size
+ fd.seek(padding, 1)
+
+ def bitmap_dir_entry_raw_size(self):
+ return struct.calcsize(self.fmt) + self.name_size + \
+ self.extra_data_size
+
+ def dump(self):
+ print(f'{"Bitmap name":<25} {self.name}')
+ super(Qcow2BitmapDirEntry, self).dump()
+
QCOW2_EXT_MAGIC_BITMAPS = 0x23852875