From: Alberto Garcia <berto@igalia.com>
To: Kevin Wolf <kwolf@redhat.com>
Cc: Stefan Hajnoczi <stefanha@redhat.com>,
qemu-devel@nongnu.org, qemu-block@nongnu.org,
Max Reitz <mreitz@redhat.com>
Subject: Re: [Qemu-devel] [PATCH v3 2/4] block: Add 'ignore-backing' field to BlockdevOptionsGenericCOWFormat
Date: Mon, 14 Sep 2015 16:20:12 +0200 [thread overview]
Message-ID: <w51io7dgk0z.fsf@maestria.local.igalia.com> (raw)
In-Reply-To: <20150914084555.GB3550@noname.str.redhat.com>
On Mon 14 Sep 2015 10:45:55 AM CEST, Kevin Wolf wrote:
>> >>> So why do we need the new flag? Because "backing: ''" is ugly?
>>
>> Anyway, was this ever implemented? It seems that passing a string to
>> the 'backing' parameter is only specified in the JSON schema, but no
>> one actually uses that.
>>
> I have a patch that actually allows passing a node-name reference as a
> string here. v1 was posted a few months ago; it just turned out that I
> need to kill bdrv_swap() before that can work because bdrv_swap()
> doesn't work with nodes that have a BlockBackend attached.
But there was no way to open a BDS without having a BlockBackend
attached, or was there? It's possible with Max's "BlockBackend and
media" series, that's why I am using it.
Berto
next prev parent reply other threads:[~2015-09-14 14:20 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-10 13:39 [Qemu-devel] [PATCH v3 0/4] Add 'blockdev-snapshot' command Alberto Garcia
2015-09-10 13:39 ` [Qemu-devel] [PATCH v3 1/4] block: rename BlockdevSnapshot to BlockdevSnapshotSync Alberto Garcia
2015-09-11 17:15 ` Max Reitz
2015-09-10 13:39 ` [Qemu-devel] [PATCH v3 2/4] block: Add 'ignore-backing' field to BlockdevOptionsGenericCOWFormat Alberto Garcia
2015-09-11 17:21 ` Max Reitz
2015-09-11 17:28 ` Kevin Wolf
2015-09-11 17:33 ` Max Reitz
2015-09-14 5:54 ` Alberto Garcia
2015-09-14 8:45 ` Kevin Wolf
2015-09-14 14:20 ` Alberto Garcia [this message]
2015-09-11 17:28 ` Eric Blake
2015-09-11 17:30 ` [Qemu-devel] [Qemu-block] " Eric Blake
2015-09-10 13:39 ` [Qemu-devel] [PATCH v3 3/4] block: add a 'blockdev-snapshot' QMP command Alberto Garcia
2015-09-11 17:58 ` Eric Blake
2015-09-14 14:08 ` Alberto Garcia
2015-09-11 18:11 ` Max Reitz
2015-09-10 13:39 ` [Qemu-devel] [PATCH v3 4/4] block: add tests for the 'blockdev-snapshot' command Alberto Garcia
2015-09-11 18:02 ` Eric Blake
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