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Re: [Qemu-devel] [PATCH for-2.9 2/2] commit: Set commit_top_bs->total_se
From: |
Eric Blake |
Subject: |
Re: [Qemu-devel] [PATCH for-2.9 2/2] commit: Set commit_top_bs->total_sectors |
Date: |
Thu, 6 Apr 2017 12:36:52 -0500 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.8.0 |
On 04/06/2017 12:14 PM, Kevin Wolf wrote:
> Like in the mirror filter driver, we also need to set the image size for
> the commit filter driver. This is less likely to be a problem in
> practice than for the mirror because we're not at the active layer here,
> but attaching new parents to a node in the middle of the chain is
> possible, so the size needs to be correct anyway.
>
> Signed-off-by: Kevin Wolf <address@hidden>
> ---
> block/commit.c | 1 +
> 1 file changed, 1 insertion(+)
Reviewed-by: Eric Blake <address@hidden>
>
> diff --git a/block/commit.c b/block/commit.c
> index 4c38220..91d2c34 100644
> --- a/block/commit.c
> +++ b/block/commit.c
> @@ -335,6 +335,7 @@ void commit_start(const char *job_id, BlockDriverState
> *bs,
> if (commit_top_bs == NULL) {
> goto fail;
> }
> + commit_top_bs->total_sectors = top->total_sectors;
[I'd really like to change total_sectors to bytes in 2.10 or later, but
that's a much hairier mess to untangle. I've got some patches that I
hope to post soon that at least start the process with regards to
bdrv_is_allocated...]
--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
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