Re: [Qemu-block] [Qemu-devel] [PATCH] raw-posix: add 'offset' and 'size' options

[Paolo Bonzini]

On 03/10/2016 10:52, Daniel P. Berrange wrote:
> On Sun, Oct 02, 2016 at 09:13:29PM +0200, Tomáš Golembiovský wrote:
>> Added two new options 'offset' and 'size'. This makes it possible to use
>> only part of the file as a device. This can be used e.g. to limit the
>> access only to single partition in a disk image or use a disk inside a
>> tar archive (like OVA).
>>
>> For now this is only possible for files in read-only mode. It should be
>> possible to extend it later to allow read-write mode, but would probably
>> require that the size of the device is kept constant (i.e. no resizing).
>>
>> Signed-off-by: Tomáš Golembiovský <address@hidden>
>> ---
>>  block/raw-posix.c | 97 
>> +++++++++++++++++++++++++++++++++++++++++++++++++++----
>>  1 file changed, 91 insertions(+), 6 deletions(-)
> 
> An equivalent change is needed to raw-win32.c

Actually, it should be done _only_ in block/raw_bsd.c.

Paolo