Re: [net-next v2 1/3] seg6: add netlink_ext_ack support in parsing SRv6 behavior attributes

[David Ahern]

On 9/12/22 11:16 AM, Andrea Mayer wrote:
> An SRv6 behavior instance can be set up using mandatory and/or optional
> attributes.
> In the setup phase, each supplied attribute is parsed and processed. If
> the parsing operation fails, the creation of the behavior instance stops
> and an error number/code is reported to the user.  In many cases, it is
> challenging for the user to figure out exactly what happened by relying
> only on the error code.
> 
> For this reason, we add the support for netlink_ext_ack in parsing SRv6
> behavior attributes. In this way, when an SRv6 behavior attribute is
> parsed and an error occurs, the kernel can send a message to the
> userspace describing the error through a meaningful text message in
> addition to the classic error code.
> 
> Signed-off-by: Andrea Mayer <andrea.mayer@xxxxxxxxxxx>
> ---
>  net/ipv6/seg6_local.c | 44 +++++++++++++++++++++++++++----------------
>  1 file changed, 28 insertions(+), 16 deletions(-)
> 

Reviewed-by: David Ahern <dsahern@xxxxxxxxxx>