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Re: [Qemu-devel] [PATCH 9/9] block: Allow changing 'force-share' on reop
From: |
Max Reitz |
Subject: |
Re: [Qemu-devel] [PATCH 9/9] block: Allow changing 'force-share' on reopen |
Date: |
Wed, 29 Aug 2018 14:01:27 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 |
On 2018-08-26 16:09, Alberto Garcia wrote:
> 'force-share' is one of the basic BlockdevOptions available for all
> drivers, but it's silently ignored by bdrv_reopen_prepare/commit(), so
> the user cannot change it and doesn't get an error explaining that it
> can't be changed.
>
> One example of how this option is being ignored is that on a
> read-write image this should produce an error:
>
> (qemu) qemu-io virtio0 "reopen -o force-share=on"
> force-share=on can only be used with read-only images
>
> Since there's no reason why we shouldn't allow changing it and the
> implementation is simple let's just do it.
>
> Signed-off-by: Alberto Garcia <address@hidden>
> ---
> block.c | 30 ++++++++++++++++++++++++------
> include/block/block.h | 1 +
> 2 files changed, 25 insertions(+), 6 deletions(-)
Reviewed-by: Max Reitz <address@hidden>
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- [Qemu-devel] [PATCH 8/9] block: Allow changing 'detect-zeroes' on reopen, (continued)
[Qemu-devel] [PATCH 2/9] file-posix: x-check-cache-dropped should default to false on reopen, Alberto Garcia, 2018/08/26
[Qemu-devel] [PATCH 9/9] block: Allow changing 'force-share' on reopen, Alberto Garcia, 2018/08/26
- Re: [Qemu-devel] [PATCH 9/9] block: Allow changing 'force-share' on reopen,
Max Reitz <=
[Qemu-devel] [PATCH 6/9] file-posix: Forbid trying to change unsupported options during reopen, Alberto Garcia, 2018/08/26
[Qemu-devel] [PATCH 7/9] block: Allow changing 'discard' on reopen, Alberto Garcia, 2018/08/26