Re: [Qemu-block] [PATCH] doc: Preallocation does not require writing zeroes

2019-08-15 Thread Max Reitz
On 11.07.19 15:29, Max Reitz wrote: > When preallocating an encrypted qcow2 image, it just lets the protocol > driver write data and then does not mark the clusters as zero. > Therefore, reading this image will yield effectively random data. > > As such, we have not fulfilled the promise of

Re: [Qemu-block] [PATCH] doc: Preallocation does not require writing zeroes

2019-07-15 Thread Stefano Garzarella
On Fri, Jul 12, 2019 at 08:33:14PM +0200, Max Reitz wrote: > On 12.07.19 12:27, Stefano Garzarella wrote: > > On Thu, Jul 11, 2019 at 03:29:35PM +0200, Max Reitz wrote: > >> When preallocating an encrypted qcow2 image, it just lets the protocol > >> driver write data and then does not mark the

Re: [Qemu-block] [PATCH] doc: Preallocation does not require writing zeroes

2019-07-12 Thread Max Reitz
On 12.07.19 12:27, Stefano Garzarella wrote: > On Thu, Jul 11, 2019 at 03:29:35PM +0200, Max Reitz wrote: >> When preallocating an encrypted qcow2 image, it just lets the protocol >> driver write data and then does not mark the clusters as zero. >> Therefore, reading this image will yield

Re: [Qemu-block] [PATCH] doc: Preallocation does not require writing zeroes

2019-07-12 Thread Stefano Garzarella
On Thu, Jul 11, 2019 at 03:29:35PM +0200, Max Reitz wrote: > When preallocating an encrypted qcow2 image, it just lets the protocol > driver write data and then does not mark the clusters as zero. > Therefore, reading this image will yield effectively random data. > > As such, we have not

Re: [Qemu-block] [PATCH] doc: Preallocation does not require writing zeroes

2019-07-11 Thread Maxim Levitsky
On Thu, 2019-07-11 at 15:29 +0200, Max Reitz wrote: > When preallocating an encrypted qcow2 image, it just lets the protocol > driver write data and then does not mark the clusters as zero. > Therefore, reading this image will yield effectively random data. > > As such, we have not fulfilled the

Re: [Qemu-block] [PATCH] doc: Preallocation does not require writing zeroes

2019-07-11 Thread Eric Blake
On 7/11/19 8:29 AM, Max Reitz wrote: > When preallocating an encrypted qcow2 image, it just lets the protocol > driver write data and then does not mark the clusters as zero. > Therefore, reading this image will yield effectively random data. > > As such, we have not fulfilled the promise of