[PATCH 0/2] qcow2: Force preallocation with data-file-raw

[Max Reitz]

Hi,

As discussed here:

https://lists.nongnu.org/archive/html/qemu-block/2020-02/msg00644.html
https://lists.nongnu.org/archive/html/qemu-block/2020-04/msg00329.html
https://lists.nongnu.org/archive/html/qemu-block/2020-06/msg00240.html

I think that qcow2 images with data-file-raw should always have
preallocated 1:1 L1/L2 tables, so that the image always looks the same
whether you respect or ignore the qcow2 metadata.  The easiest way to
achieve that is to enforce at least metadata preallocation whenever
data-file-raw is given.


Max Reitz (2):
  qcow2: Force preallocation with data-file-raw
  iotests/244: Test preallocation for data-file-raw

 block/qcow2.c              | 22 +++++++++++++
 tests/qemu-iotests/244     | 65 ++++++++++++++++++++++++++++++++++++++
 tests/qemu-iotests/244.out | 32 ++++++++++++++++---
 3 files changed, 114 insertions(+), 5 deletions(-)

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2.26.2