Re: [Qemu-devel] [PATCH 6/9] file-posix: Forbid trying to change unsupported options during reopen

[Max Reitz]

On 2018-08-26 16:09, Alberto Garcia wrote:
> The file-posix code is used for the "file", "host_device" and
> "host_cdrom" drivers, and it allows reopening images. However the only
> option that is actually processed is "x-check-cache-dropped", and
> changes in all other options (e.g. "filename") are silently ignored:
> 
>    (qemu) qemu-io virtio0 "reopen -o file.filename=no-such-file"
> 
> While we could allow changing some of the other options, let's keep
> things as they are for now but return an error if the user tries to
> change any of them.
> 
> Signed-off-by: Alberto Garcia <address@hidden>
> ---
>  block/file-posix.c | 9 +++++++--
>  1 file changed, 7 insertions(+), 2 deletions(-)

Looks OK, but the same question from the last patch arises.  If
unspecified options mean using the default, shouldn't the user have to
re-specify all mandatory options, so at least @filename in this case?

Max

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