From: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
To: Max Reitz <mreitz@redhat.com>,
"qemu-block@nongnu.org" <qemu-block@nongnu.org>
Cc: "kwolf@redhat.com" <kwolf@redhat.com>,
"qemu-devel@nongnu.org" <qemu-devel@nongnu.org>,
Denis Lunev <den@virtuozzo.com>
Subject: Re: [Qemu-devel] [PATCH 0/2] deal with BDRV_BLOCK_RAW
Date: Tue, 13 Aug 2019 08:39:57 +0000 [thread overview]
Message-ID: <3d5fcc5b-cdb0-f028-1ea2-af85850db20e@virtuozzo.com> (raw)
In-Reply-To: <e53a0399-f051-52bd-49e8-4ac4dbf2596f@redhat.com>
12.08.2019 22:50, Max Reitz wrote:
> On 12.08.19 21:46, Max Reitz wrote:
>> On 12.08.19 20:11, Vladimir Sementsov-Ogievskiy wrote:
>>> Hi all!
>>>
>>> I'm not sure, is it a bug or a feature, but using qcow2 under raw is
>>> broken. It should be either fixed like I propose (by Max's suggestion)
>>> or somehow forbidden (just forbid backing-file supporting node to be
>>> file child of raw-format node).
>>
>> I agree, I think only filters should return BDRV_BLOCK_RAW.
>>
>> (And not even them, they should just be handled transparently by
>> bdrv_co_block_status(). But that’s something for later.)
>>
>>> Vladimir Sementsov-Ogievskiy (2):
>>> block/raw-format: switch to BDRV_BLOCK_DATA with BDRV_BLOCK_RECURSE
>>> iotests: test mirroring qcow2 under raw format
>>>
>>> block/raw-format.c | 2 +-
>>> tests/qemu-iotests/263 | 46 ++++++++++++++++++++++++++++++++++++++
>>> tests/qemu-iotests/263.out | 12 ++++++++++
>>> tests/qemu-iotests/group | 1 +
>>> 4 files changed, 60 insertions(+), 1 deletion(-)
>>> create mode 100755 tests/qemu-iotests/263
>>> create mode 100644 tests/qemu-iotests/263.out
>>
>> Thanks, applied to my block-next branch:
>>
>> https://git.xanclic.moe/XanClic/qemu/commits/branch/block-next
>
> Oops, maybe not. 221 needs to be adjusted.
>
Hmm yes, I forget to run tests.. Areas which were zero becomes data|zero, it
don't look good.
So, it's not quite right to report DATA | RECURSE, we actually should report
DATA_OR_ZERO | RECURSE, which is actually ALLOCATED | RECURSE, as otherwise
DATA will be set in final result (generic layer must not drop it, obviously).
ALLOCATED never returned by drivers but seems it should be. I'll think a bit and
resend something new.
--
Best regards,
Vladimir
next prev parent reply other threads:[~2019-08-13 8:40 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-12 18:11 [Qemu-devel] [PATCH 0/2] deal with BDRV_BLOCK_RAW Vladimir Sementsov-Ogievskiy
2019-08-12 18:11 ` [Qemu-devel] [PATCH 1/2] block/raw-format: switch to BDRV_BLOCK_DATA with BDRV_BLOCK_RECURSE Vladimir Sementsov-Ogievskiy
2019-08-13 11:04 ` Kevin Wolf
2019-08-13 11:28 ` Vladimir Sementsov-Ogievskiy
2019-08-13 12:01 ` Kevin Wolf
2019-08-13 13:21 ` [Qemu-devel] [Qemu-block] " Kevin Wolf
2019-08-13 14:46 ` Max Reitz
2019-08-13 14:43 ` [Qemu-devel] " Max Reitz
2019-08-13 14:56 ` Vladimir Sementsov-Ogievskiy
2019-08-13 15:03 ` Max Reitz
2019-08-13 15:22 ` Vladimir Sementsov-Ogievskiy
2019-08-13 16:07 ` Max Reitz
2019-08-13 15:41 ` Kevin Wolf
2019-08-13 15:54 ` Vladimir Sementsov-Ogievskiy
2019-08-13 16:08 ` Kevin Wolf
2019-08-13 16:32 ` Vladimir Sementsov-Ogievskiy
2019-08-14 6:27 ` Vladimir Sementsov-Ogievskiy
2019-08-13 16:21 ` Max Reitz
2019-08-12 18:11 ` [Qemu-devel] [PATCH 2/2] iotests: test mirroring qcow2 under raw format Vladimir Sementsov-Ogievskiy
2019-08-13 9:10 ` Kevin Wolf
2019-08-13 9:22 ` Vladimir Sementsov-Ogievskiy
2019-08-13 9:36 ` Kevin Wolf
2019-08-12 19:46 ` [Qemu-devel] [PATCH 0/2] deal with BDRV_BLOCK_RAW Max Reitz
2019-08-12 19:50 ` Max Reitz
2019-08-13 8:39 ` Vladimir Sementsov-Ogievskiy [this message]
2019-08-13 9:01 ` Vladimir Sementsov-Ogievskiy
2019-08-13 9:33 ` Vladimir Sementsov-Ogievskiy
2019-08-13 11:14 ` Vladimir Sementsov-Ogievskiy
2019-08-13 11:51 ` Kevin Wolf
2019-08-13 13:00 ` Vladimir Sementsov-Ogievskiy
2019-08-13 14:31 ` Max Reitz
2019-08-13 14:46 ` Vladimir Sementsov-Ogievskiy
2019-08-13 14:53 ` Max Reitz
2019-08-13 15:03 ` Kevin Wolf
2019-08-13 15:04 ` Max Reitz
2019-08-13 14:50 ` Eric Blake
2019-08-13 9:34 ` Kevin Wolf
2019-08-13 14:38 ` Max Reitz
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