block: qobject_is_equal() in bdrv_reopen_prepare()
Currently, bdrv_reopen_prepare() assumes that all BDS options are strings. However, this is not the case if the BDS has been created through the json: pseudo-protocol or blockdev-add. Note that the user-invokable reopen command is an HMP command, so you can only specify strings there. Therefore, specifying a non-string option with the "same" value as it was when originally created will now return an error because the values are supposedly similar (and there is no way for the user to circumvent this but to just not specify the option again -- however, this is still strictly better than just crashing). Signed-off-by: NMax Reitz <mreitz@redhat.com> Reviewed-by: NEric Blake <eblake@redhat.com> Message-id: 20171114180128.17076-5-mreitz@redhat.com Signed-off-by: NMax Reitz <mreitz@redhat.com>
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