From 0d86ad068c3e30bc0ce78c9bc4e42bb25a47bd32 Mon Sep 17 00:00:00 2001 From: "Radu Pirea (NXP OSS)" Date: Thu, 5 Oct 2023 21:06:33 +0300 Subject: [PATCH] net: macsec: indicate next pn update when offloading [ Upstream commit 0412cc846a1ef38697c3f321f9b174da91ecd3b5 ] Indicate next PN update using update_pn flag in macsec_context. Offloaded MACsec implementations does not know whether or not the MACSEC_SA_ATTR_PN attribute was passed for an SA update and assume that next PN should always updated, but this is not always true. The PN can be reset to its initial value using the following command: $ ip macsec set macsec0 tx sa 0 off #octeontx2-pf case Or, the update PN command will succeed even if the driver does not support PN updates. $ ip macsec set macsec0 tx sa 0 pn 1 on #mscc phy driver case Comparing the initial PN with the new PN value is not a solution. When the user updates the PN using its initial value the command will succeed, even if the driver does not support it. Like this: $ ip macsec add macsec0 tx sa 0 pn 1 on key 00 \ ead3664f508eb06c40ac7104cdae4ce5 $ ip macsec set macsec0 tx sa 0 pn 1 on #mlx5 case Signed-off-by: Radu Pirea (NXP OSS) Reviewed-by: Sabrina Dubroca Signed-off-by: Paolo Abeni Stable-dep-of: e0a8c918daa5 ("net: phy: mscc: macsec: reject PN update requests") Signed-off-by: Sasha Levin --- drivers/net/macsec.c | 2 ++ include/net/macsec.h | 1 + 2 files changed, 3 insertions(+) diff --git a/drivers/net/macsec.c b/drivers/net/macsec.c index 578f470e9fad9..81453e84b6413 100644 --- a/drivers/net/macsec.c +++ b/drivers/net/macsec.c @@ -2384,6 +2384,7 @@ static int macsec_upd_txsa(struct sk_buff *skb, struct genl_info *info) ctx.sa.assoc_num = assoc_num; ctx.sa.tx_sa = tx_sa; + ctx.sa.update_pn = !!prev_pn.full64; ctx.secy = secy; ret = macsec_offload(ops->mdo_upd_txsa, &ctx); @@ -2477,6 +2478,7 @@ static int macsec_upd_rxsa(struct sk_buff *skb, struct genl_info *info) ctx.sa.assoc_num = assoc_num; ctx.sa.rx_sa = rx_sa; + ctx.sa.update_pn = !!prev_pn.full64; ctx.secy = secy; ret = macsec_offload(ops->mdo_upd_rxsa, &ctx); diff --git a/include/net/macsec.h b/include/net/macsec.h index 5b9c61c4d3a62..65c93959c2dc5 100644 --- a/include/net/macsec.h +++ b/include/net/macsec.h @@ -257,6 +257,7 @@ struct macsec_context { struct macsec_secy *secy; struct macsec_rx_sc *rx_sc; struct { + bool update_pn; unsigned char assoc_num; u8 key[MACSEC_MAX_KEY_LEN]; union { -- 2.39.5