Re: [PATCH net-next v2 4/9] net: introduce MACsec ops and add a reference in net_device

Jakub Kicinski
2019-08-09T20:35:16Z

On Thu, 8 Aug 2019 16:05:55 +0200, Antoine Tenart wrote:
> This patch introduces MACsec ops for drivers to support offloading
> MACsec operations. A reference to those ops is added in net_device.
>
> Signed-off-by: Antoine Tenart <antoine.tenart@bootlin.com>
> ---
> include/linux/netdevice.h | 31 +++++++++++++++++++++++++++++++
> 1 file changed, 31 insertions(+)
>
> diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
> index 88292953aa6f..59ff123d62e3 100644
> --- a/include/linux/netdevice.h
> +++ b/include/linux/netdevice.h
> @@ -53,6 +53,7 @@ struct netpoll_info;
> struct device;
> struct phy_device;
> struct dsa_port;
> +struct macsec_context;
>
> struct sfp_bus;
> /* 802.11 specific */
> @@ -910,6 +911,29 @@ struct xfrmdev_ops {
> };
> #endif
>
> +#if defined(CONFIG_MACSEC)
> +struct macsec_ops {

I think it'd be cleaner to have macsec_ops declared in macsec.h
and forward declare macsec_ops rather than macsec_context.

> + /* Device wide */
> + int (*mdo_dev_open)(struct macsec_context *ctx);
> + int (*mdo_dev_stop)(struct macsec_context *ctx);
> + /* SecY */
> + int (*mdo_add_secy)(struct macsec_context *ctx);
> + int (*mdo_upd_secy)(struct macsec_context *ctx);
> + int (*mdo_del_secy)(struct macsec_context *ctx);
> + /* Security channels */
> + int (*mdo_add_rxsc)(struct macsec_context *ctx);
> + int (*mdo_upd_rxsc)(struct macsec_context *ctx);
> + int (*mdo_del_rxsc)(struct macsec_context *ctx);
> + /* Security associations */
> + int (*mdo_add_rxsa)(struct macsec_context *ctx);
> + int (*mdo_upd_rxsa)(struct macsec_context *ctx);
> + int (*mdo_del_rxsa)(struct macsec_context *ctx);
> + int (*mdo_add_txsa)(struct macsec_context *ctx);
> + int (*mdo_upd_txsa)(struct macsec_context *ctx);
> + int (*mdo_del_txsa)(struct macsec_context *ctx);
> +};
> +#endif
> +
> struct dev_ifalias {
> struct rcu_head rcuhead;
> char ifalias[];
> @@ -1755,6 +1779,8 @@ enum netdev_priv_flags {
> *
> * @wol_enabled: Wake-on-LAN is enabled
> *
> + * @macsec_ops: MACsec offloading ops
> + *
> * FIXME: cleanup struct net_device such that network protocol info
> * moves out.
> */
> @@ -2036,6 +2062,11 @@ struct net_device {
> struct lock_class_key *qdisc_running_key;
> bool proto_down;
> unsigned wol_enabled:1;
> +
> +#if IS_ENABLED(CONFIG_MACSEC)
> + /* MACsec management functions */
> + const struct macsec_ops *macsec_ops;
> +#endif
> };
> #define to_net_dev(d) container_of(d, struct net_device, dev)
>