Re: [PATCH net-next] rtnetlink: add support for protodown reason
From: Stephen Hemminger <stephen@networkplumber.org>
Date: 2020-07-27 20:47:15
On Mon, 27 Jul 2020 12:21:17 -0700 Roopa Prabhu [off-list ref] wrote:
- + nla_total_size(1) /* IFLA_PROTO_DOWN */ + + rtnl_proto_down_size(dev) /* proto down */
Changing the size of a netlink field is an ABI change in the kernel. This has the potential to break existing programs. Wouldn't it be safer to add a new link attribute for the reason rather than overloading the existing attribute?