Commit 5c937de7 authored by Antoine Tenart's avatar Antoine Tenart Committed by David S. Miller
Browse files

net: macsec: PN wrap callback 



Allow to call macsec_pn_wrapped from hardware drivers to notify when a
PN rolls over. Some drivers might used an interrupt to implement this.

Signed-off-by: default avatarAntoine Tenart <antoine.tenart@bootlin.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 28c5107a

drivers/net/macsec.c

+19 −6
Original line number Diff line number Diff line
@@ -424,6 +424,23 @@ static struct macsec_eth_header *macsec_ethhdr(struct sk_buff *skb) 
	return (struct macsec_eth_header *)skb_mac_header(skb);

}



static void __macsec_pn_wrapped(struct macsec_secy *secy,

				struct macsec_tx_sa *tx_sa)

{

	pr_debug("PN wrapped, transitioning to !oper\n");

	tx_sa->active = false;

	if (secy->protect_frames)

		secy->operational = false;

}



void macsec_pn_wrapped(struct macsec_secy *secy, struct macsec_tx_sa *tx_sa)

{

	spin_lock_bh(&tx_sa->lock);

	__macsec_pn_wrapped(secy, tx_sa);

	spin_unlock_bh(&tx_sa->lock);

}

EXPORT_SYMBOL_GPL(macsec_pn_wrapped);



static u32 tx_sa_update_pn(struct macsec_tx_sa *tx_sa, struct macsec_secy *secy)

{

	u32 pn;
@@ -432,12 +449,8 @@ static u32 tx_sa_update_pn(struct macsec_tx_sa *tx_sa, struct macsec_secy *secy) 
	pn = tx_sa->next_pn;



	tx_sa->next_pn++;

	if (tx_sa->next_pn == 0) {

		pr_debug("PN wrapped, transitioning to !oper\n");

		tx_sa->active = false;

		if (secy->protect_frames)

			secy->operational = false;

	}

	if (tx_sa->next_pn == 0)

		__macsec_pn_wrapped(secy, tx_sa);

	spin_unlock_bh(&tx_sa->lock);



	return pn;

include/net/macsec.h

+2 −0
Original line number Diff line number Diff line
@@ -219,4 +219,6 @@ struct macsec_ops { 
	int (*mdo_del_txsa)(struct macsec_context *ctx);

};



void macsec_pn_wrapped(struct macsec_secy *secy, struct macsec_tx_sa *tx_sa);



#endif /* _NET_MACSEC_H_ */