Re: [Qemu-devel] [PATCH] Don't require encryption password for 'qemu-img info' command

[Kevin Wolf <kwolf@redhat.com>]

Am 31.08.2012 19:30, schrieb Eric Blake:
> On 08/31/2012 10:26 AM, Daniel P. Berrange wrote:
>> From: "Daniel P. Berrange" <berrange@redhat.com>
>>
>> The encryption password is only required if I/O is going to be
>> performed on a disk image. The 'qemu-img info' command merely
>> reports metadata, so it should not ask for a decryption password
>>
>> Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
>> ---
>>  qemu-img.c | 21 +++++++++++----------
>>  1 file changed, 11 insertions(+), 10 deletions(-)
>>
>> diff --git a/qemu-img.c b/qemu-img.c
>> index b41e670..3dd4ec7 100644
>> --- a/qemu-img.c
>> +++ b/qemu-img.c
>> @@ -221,7 +221,8 @@ static int print_block_option_help(const char *filename, const char *fmt)
>>  
>>  static BlockDriverState *bdrv_new_open(const char *filename,
>>                                         const char *fmt,
>> -                                       int flags)
>> +                                       int flags,
>> +                                       int requireIO)
> 
> Since you only pass 0 or 1 for requireIO, why not make it bool? 

Yes, please. bool require_io, to be precise. The qemu coding style
doesn't use camelCase here.

> For
> that matter, why not make it part of 'flags', where the default is to
> require decryption, and a new flag BDV_O_NO_IO can be added when opening
> an image for no I/O and used to avoid the decryption?

Because the block layer isn't really interested in it, this should be
kept inside qemu-img.

Kevin