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| author | Antoine Tenart <antoine.tenart@bootlin.com> | 2020-01-13 23:31:47 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-01-14 11:31:41 -0800 |
| commit | 5c937de78b39e47ce9924fc4b863c5b727edc328 (patch) | |
| tree | 7c5c422eaae4ad3ff4b0a427199033955b0524a1 /drivers/net/macsec.c | |
| parent | 28c5107aa904ef9db6b023039d20b6b4c4181675 (diff) | |
| download | lwn-5c937de78b39e47ce9924fc4b863c5b727edc328.tar.gz lwn-5c937de78b39e47ce9924fc4b863c5b727edc328.zip | |
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: Antoine Tenart <antoine.tenart@bootlin.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/macsec.c')
| -rw-r--r-- | drivers/net/macsec.c | 25 |
1 files changed, 19 insertions, 6 deletions
diff --git a/drivers/net/macsec.c b/drivers/net/macsec.c index e515919e8687..45bfd99f17fa 100644 --- a/drivers/net/macsec.c +++ b/drivers/net/macsec.c @@ -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; |