From: Eric Blake <eblake@redhat.com>
To: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>,
qemu-block@nongnu.org
Cc: kwolf@redhat.com, fam@euphon.net, qemu-devel@nongnu.org,
mreitz@redhat.com, stefanha@redhat.com, den@openvz.org
Subject: Re: [PATCH v3 4/5] block/io: fix bdrv_is_allocated_above
Date: Wed, 20 May 2020 11:36:58 -0500 [thread overview]
Message-ID: <6e1143e2-2bd6-f75c-b2ff-2074f4423ca2@redhat.com> (raw)
In-Reply-To: <20200520083520.25793-5-vsementsov@virtuozzo.com>
On 5/20/20 3:35 AM, Vladimir Sementsov-Ogievskiy wrote:
> bdrv_is_allocated_above wrongly handles short backing files: it reports
> after-EOF space as UNALLOCATED which is wrong, as on read the data is
> generated on the level of short backing file (if all overlays has
> unallocated area at that place).
>
> Reusing bdrv_common_block_status_above fixes the issue and unifies code
> path.
>
> Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
> ---
> block/io.c | 43 +++++--------------------------------------
> 1 file changed, 5 insertions(+), 38 deletions(-)
>
Reviewed-by: Eric Blake <eblake@redhat.com>
--
Eric Blake, Principal Software Engineer
Red Hat, Inc. +1-919-301-3226
Virtualization: qemu.org | libvirt.org
next prev parent reply other threads:[~2020-05-20 16:39 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-20 8:35 [PATCH v3 0/5] fix & merge block_status_above and is_allocated_above Vladimir Sementsov-Ogievskiy
2020-05-20 8:35 ` [PATCH v3 1/5] block/io: fix bdrv_co_block_status_above Vladimir Sementsov-Ogievskiy
2020-05-20 14:38 ` Eric Blake
2020-05-20 8:35 ` [PATCH v3 2/5] block/io: bdrv_common_block_status_above: support include_base Vladimir Sementsov-Ogievskiy
2020-05-20 16:26 ` Eric Blake
2020-05-20 8:35 ` [PATCH v3 3/5] block/io: bdrv_common_block_status_above: support bs == base Vladimir Sementsov-Ogievskiy
2020-05-20 16:30 ` Eric Blake
2020-05-20 8:35 ` [PATCH v3 4/5] block/io: fix bdrv_is_allocated_above Vladimir Sementsov-Ogievskiy
2020-05-20 16:36 ` Eric Blake [this message]
2020-05-20 8:35 ` [PATCH v3 5/5] iotests: add commit top->base cases to 274 Vladimir Sementsov-Ogievskiy
2020-05-20 16:39 ` Eric Blake
2020-05-21 11:08 ` Vladimir Sementsov-Ogievskiy
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