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Re: [PATCH v2] block/backup-top: fix flags handling

From: Eric Blake
Subject: Re: [PATCH v2] block/backup-top: fix flags handling
Date: Mon, 3 Feb 2020 09:42:10 -0600
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.4.1

On 2/3/20 7:42 AM, Vladimir Sementsov-Ogievskiy wrote:
backup-top "supports" write-unchanged, by skipping CBW operation in
backup_top_co_pwritev. But it forgets to do the same in
backup_top_co_pwrite_zeroes, as well as declare support for

Fix this, and, while being here, declare also support for flags
supported by source child.

Signed-off-by: Vladimir Sementsov-Ogievskiy <address@hidden>

Reviewed-by: Eric Blake <address@hidden>

Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3226
Virtualization:  qemu.org | libvirt.org

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