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Re: [RFC PATCH v3 09/27] qcow2: Add l2_entry_size()


From: Max Reitz
Subject: Re: [RFC PATCH v3 09/27] qcow2: Add l2_entry_size()
Date: Thu, 20 Feb 2020 17:24:36 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.4.1

On 22.12.19 12:36, Alberto Garcia wrote:
> qcow2 images with subclusters have 128-bit L2 entries. The first 64
> bits contain the same information as traditional images and the last
> 64 bits form a bitmap with the status of each individual subcluster.
> 
> Because of that we cannot assume that L2 entries are sizeof(uint64_t)
> anymore. This function returns the proper value for the image.
> 
> Signed-off-by: Alberto Garcia <address@hidden>
> ---
>  block/qcow2-cluster.c  | 12 ++++++------
>  block/qcow2-refcount.c | 14 ++++++++------
>  block/qcow2.c          |  8 ++++----
>  block/qcow2.h          |  9 +++++++++
>  4 files changed, 27 insertions(+), 16 deletions(-)

Assuming qcow2_calc_prealloc_size() and qcow2_measure are fixed up in
patch 26:

Reviewed-by: Max Reitz <address@hidden>

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