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qcow2_format.py: dump bitmap flags in human readable way.

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Introduce the class BitmapFlags that parses a bitmap flags mask.

Suggested-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Signed-off-by: Andrey Shinkevich <andrey.shinkevich@virtuozzo.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-Id: <1596742557-320265-5-git-send-email-andrey.shinkevich@virtuozzo.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
This commit is contained in:
Andrey Shinkevich 2020-08-06 22:35:50 +03:00 committed by Eric Blake
parent 991a02ca7f
commit 82cb822324
1 changed files with 16 additions and 0 deletions
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16
tests/qemu-iotests/qcow2_format.py
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@ -40,6 +40,22 @@ class Flags64(Qcow2Field):
return str(bits) return str(bits)
class BitmapFlags(Qcow2Field):
flags = {
0x1: 'in-use',
0x2: 'auto'
}
def __str__(self):
bits = []
for bit in range(64):
flag = self.value & (1 << bit)
if flag:
bits.append(self.flags.get(flag, f'bit-{bit}'))
return f'{self.value:#x} ({bits})'
class Enum(Qcow2Field): class Enum(Qcow2Field):
def __str__(self): def __str__(self):