From f07c3ee209b3897efebb4cf008c88a390205a5dd Mon Sep 17 00:00:00 2001 From: Kevin Wolf Date: Fri, 13 Mar 2020 12:34:32 +0000 Subject: block: Versioned x-blockdev-reopen API with feature flag RH-Author: Kevin Wolf Message-id: <20200313123439.10548-7-kwolf@redhat.com> Patchwork-id: 94283 O-Subject: [RHEL-AV-8.2.0 qemu-kvm PATCH v2 06/13] block: Versioned x-blockdev-reopen API with feature flag Bugzilla: 1790482 1805143 RH-Acked-by: Eric Blake RH-Acked-by: John Snow RH-Acked-by: Daniel P. Berrange RH-Acked-by: Peter Krempa x-blockdev-reopen is still considered unstable upstream. libvirt needs (a small subset of) it for incremental backups, though. Add a downstream-only feature flag that effectively makes this a versioned interface. As long as the feature is present, we promise that we won't change the interface incompatibly. Incompatible changes to the command will require us to drop the feature flag (and possibly introduce a new one if the new version is still not stable upstream). Signed-off-by: Kevin Wolf Signed-off-by: Danilo C. L. de Paula --- qapi/block-core.json | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/qapi/block-core.json b/qapi/block-core.json index 943df19..50b99fb 100644 --- a/qapi/block-core.json +++ b/qapi/block-core.json @@ -4126,10 +4126,17 @@ # image does not have a default backing file name as part of its # metadata. # +# Features: +# @__com.redhat_rhel-av-8_2_0-api: Versioning the downstream interface while +# it's still unstable upstream. As long as +# this flag is present, this command will not +# change incompatibly. +# # Since: 4.0 ## { 'command': 'x-blockdev-reopen', - 'data': 'BlockdevOptions', 'boxed': true } + 'data': 'BlockdevOptions', 'boxed': true, + 'features': [ '__com.redhat_rhel-av-8_2_0-api' ] } ## # @blockdev-del: -- 1.8.3.1