Re: [Qemu-devel] [PATCH 1/2] qcow2: free allocated cluster on fail in qcow2_write_snapshots()

[Wenchao Xia <xiawenc@linux.vnet.ibm.com>]

于 2013-5-16 17:32, Stefan Hajnoczi 写道:
> On Wed, May 15, 2013 at 04:43:38PM +0800, Wenchao Xia wrote:
>> Signed-off-by: Wenchao Xia <xiawenc@linux.vnet.ibm.com>
>> ---
>>   block/qcow2-snapshot.c |    2 ++
>>   1 files changed, 2 insertions(+), 0 deletions(-)
>>
>> diff --git a/block/qcow2-snapshot.c b/block/qcow2-snapshot.c
>> index 992a5c8..a6065a9 100644
>> --- a/block/qcow2-snapshot.c
>> +++ b/block/qcow2-snapshot.c
>> @@ -268,6 +268,8 @@ static int qcow2_write_snapshots(BlockDriverState *bs)
>>       return 0;
>>
>>   fail:
>> +    /* free the new snapshot table */
>> +    qcow2_free_clusters(bs, snapshots_offset, snapshots_size);
>>       return ret;
>>   }
>
> snapshots_offset = qcow2_alloc_clusters(bs, snapshots_size);
> offset = snapshots_offset;
> if (offset < 0) {
>      return offset;
> }
> ret = bdrv_flush(bs);
> if (ret < 0) {
>      return ret;
> }
>
> For completeness the bdrv_flush() return ret should be change to a goto
> fail so that we cover all failure cases.
>
   Ok, will add those.

-- 
Best Regards

Wenchao Xia