On 4/19/24 8:35 PM, Jakub Kicinski wrote:
> Note that when this commit message refers to netlink dump
> it only means the actual dumping part, the parsing / dump
> start is handled by the same code as "doit".
>
> Commit 4a19edb60d02 ("netlink: Pass extack to dump handlers")
> added support for returning extack messages from dump handlers,
> but left out other extack info, e.g. bad attribute.
>
> This used to be fine because until YNL we had little practical
> use for the machine readable attributes, and only messages were
> used in practice.
>
> YNL flips the preference 180 degrees, it's now much more useful
> to point to a bad attr with NL_SET_BAD_ATTR() than type
> an English message saying "attribute XYZ is $reason-why-bad".
>
> Support all of extack. The fact that extack only gets added if
> it fits remains unaddressed.
>
> Signed-off-by: Jakub Kicinski <k...@kernel.org>
> ---
> net/netlink/af_netlink.c | 15 ++++++++++-----
> 1 file changed, 10 insertions(+), 5 deletions(-)
>
Reviewed-by: David Ahern <dsah...@kernel.org>
