Re: [PATCH v3 07/12] block: introduce preallocate filter

[Stefan Hajnoczi]

On Mon, Aug 17, 2020 at 12:15:48PM +0300, Vladimir Sementsov-Ogievskiy wrote:
> diff --git a/docs/system/qemu-block-drivers.rst.inc 
> b/docs/system/qemu-block-drivers.rst.inc
> index b052a6d14e..5bfa4f4116 100644
> --- a/docs/system/qemu-block-drivers.rst.inc
> +++ b/docs/system/qemu-block-drivers.rst.inc
> @@ -952,3 +952,29 @@ on host and see if there are locks held by the QEMU 
> process on the image file.
>  More than one byte could be locked by the QEMU instance, each byte of which
>  reflects a particular permission that is acquired or protected by the running
>  block driver.
> +
> +Filter drivers
> +~~~~~~~~~~~~~~
> +
> +Qemu supports several filter drivers, which doesn't store any data, but do 
> some

s/Qemu/QEMU/

s/doesn't/don't/

> +typedef struct BDRVPreallocateState {
> +    int64_t prealloc_size;
> +    int64_t prealloc_align;
> +
> +    /*
> +     * Filter is started as not-active, so it doesn't do any preallocations 
> nor
> +     * requires BLK_PERM_RESIZE on its child. This is needed to create filter
> +     * above another node-child and than do bdrv_replace_node to insert the

s/than/then/

> +     * filter.
> +     *
> +     * Filter becomes active the first time it detect that its parents has

s/detect/detects/
s/has/have/

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