[][Add macsec HW offload backport from kernel 5.18]

[Description]
Add macsec HW offload backport from kernel 5.18.

[Release-log]
N/A

Change-Id: I5b143fe620ec4bcae4075d1d85db5e41c8d48717
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/5981730
diff --git a/target/linux/mediatek/patches-5.4/999-1763-v5.18-net-macsec-Netlink-support-of-XPN-cipher-suites-IEEE802.1AEbw.patch b/target/linux/mediatek/patches-5.4/999-1763-v5.18-net-macsec-Netlink-support-of-XPN-cipher-suites-IEEE802.1AEbw.patch
new file mode 100644
index 0000000..2d00be3
--- /dev/null
+++ b/target/linux/mediatek/patches-5.4/999-1763-v5.18-net-macsec-Netlink-support-of-XPN-cipher-suites-IEEE802.1AEbw.patch
@@ -0,0 +1,452 @@
+From 48ef50fa866aae087f63c7de8a47e76537f88691 Mon Sep 17 00:00:00 2001
+From: Era Mayflower <mayflowerera@gmail.com>
+Date: Mon, 9 Mar 2020 19:47:02 +0000
+Subject: macsec: Netlink support of XPN cipher suites (IEEE 802.1AEbw)
+
+Netlink support of extended packet number cipher suites,
+allows adding and updating XPN macsec interfaces.
+
+Added support in:
+    * Creating interfaces with GCM-AES-XPN-128 and GCM-AES-XPN-256 suites.
+    * Setting and getting 64bit packet numbers with of SAs.
+    * Setting (only on SA creation) and getting ssci of SAs.
+    * Setting salt when installing a SAK.
+
+Added 2 cipher suite identifiers according to 802.1AE-2018 table 14-1:
+    * MACSEC_CIPHER_ID_GCM_AES_XPN_128
+    * MACSEC_CIPHER_ID_GCM_AES_XPN_256
+
+In addition, added 2 new netlink attribute types:
+    * MACSEC_SA_ATTR_SSCI
+    * MACSEC_SA_ATTR_SALT
+
+Depends on: macsec: Support XPN frame handling - IEEE 802.1AEbw.
+
+Signed-off-by: Era Mayflower <mayflowerera@gmail.com>
+Signed-off-by: David S. Miller <davem@davemloft.net>
+---
+ drivers/net/macsec.c           | 161 +++++++++++++++++++++++++++++++++++++----
+ include/net/macsec.h           |   3 +
+ include/uapi/linux/if_macsec.h |   8 +-
+ 3 files changed, 157 insertions(+), 15 deletions(-)
+
+diff --git a/drivers/net/macsec.c b/drivers/net/macsec.c
+index 6c71e250cccb0..49b138e7aeac3 100644
+--- a/drivers/net/macsec.c
++++ b/drivers/net/macsec.c
+@@ -240,11 +240,13 @@ static struct macsec_cb *macsec_skb_cb(struct sk_buff *skb)
+ #define MACSEC_PORT_ES (htons(0x0001))
+ #define MACSEC_PORT_SCB (0x0000)
+ #define MACSEC_UNDEF_SCI ((__force sci_t)0xffffffffffffffffULL)
++#define MACSEC_UNDEF_SSCI ((__force ssci_t)0xffffffff)
+ 
+ #define MACSEC_GCM_AES_128_SAK_LEN 16
+ #define MACSEC_GCM_AES_256_SAK_LEN 32
+ 
+ #define DEFAULT_SAK_LEN MACSEC_GCM_AES_128_SAK_LEN
++#define DEFAULT_XPN false
+ #define DEFAULT_SEND_SCI true
+ #define DEFAULT_ENCRYPT false
+ #define DEFAULT_ENCODING_SA 0
+@@ -1311,6 +1313,7 @@ static int init_rx_sa(struct macsec_rx_sa *rx_sa, char *sak, int key_len,
+ 		return PTR_ERR(rx_sa->key.tfm);
+ 	}
+ 
++	rx_sa->ssci = MACSEC_UNDEF_SSCI;
+ 	rx_sa->active = false;
+ 	rx_sa->next_pn = 1;
+ 	refcount_set(&rx_sa->refcnt, 1);
+@@ -1409,6 +1412,7 @@ static int init_tx_sa(struct macsec_tx_sa *tx_sa, char *sak, int key_len,
+ 		return PTR_ERR(tx_sa->key.tfm);
+ 	}
+ 
++	tx_sa->ssci = MACSEC_UNDEF_SSCI;
+ 	tx_sa->active = false;
+ 	refcount_set(&tx_sa->refcnt, 1);
+ 	spin_lock_init(&tx_sa->lock);
+@@ -1452,6 +1456,16 @@ static int nla_put_sci(struct sk_buff *skb, int attrtype, sci_t value,
+ 	return nla_put_u64_64bit(skb, attrtype, (__force u64)value, padattr);
+ }
+ 
++static ssci_t nla_get_ssci(const struct nlattr *nla)
++{
++	return (__force ssci_t)nla_get_u32(nla);
++}
++
++static int nla_put_ssci(struct sk_buff *skb, int attrtype, ssci_t value)
++{
++	return nla_put_u32(skb, attrtype, (__force u64)value);
++}
++
+ static struct macsec_tx_sa *get_txsa_from_nl(struct net *net,
+ 					     struct nlattr **attrs,
+ 					     struct nlattr **tb_sa,
+@@ -1567,11 +1581,14 @@ static const struct nla_policy macsec_genl_rxsc_policy[NUM_MACSEC_RXSC_ATTR] = {
+ static const struct nla_policy macsec_genl_sa_policy[NUM_MACSEC_SA_ATTR] = {
+ 	[MACSEC_SA_ATTR_AN] = { .type = NLA_U8 },
+ 	[MACSEC_SA_ATTR_ACTIVE] = { .type = NLA_U8 },
+-	[MACSEC_SA_ATTR_PN] = { .type = NLA_U32 },
++	[MACSEC_SA_ATTR_PN] = { .type = NLA_MIN_LEN, .len = 4 },
+ 	[MACSEC_SA_ATTR_KEYID] = { .type = NLA_BINARY,
+ 				   .len = MACSEC_KEYID_LEN, },
+ 	[MACSEC_SA_ATTR_KEY] = { .type = NLA_BINARY,
+ 				 .len = MACSEC_MAX_KEY_LEN, },
++	[MACSEC_SA_ATTR_SSCI] = { .type = NLA_U32 },
++	[MACSEC_SA_ATTR_SALT] = { .type = NLA_BINARY,
++				  .len = MACSEC_SALT_LEN, },
+ };
+ 
+ static const struct nla_policy macsec_genl_offload_policy[NUM_MACSEC_OFFLOAD_ATTR] = {
+@@ -1644,7 +1661,8 @@ static bool validate_add_rxsa(struct nlattr **attrs)
+ 	if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
+ 		return false;
+ 
+-	if (attrs[MACSEC_SA_ATTR_PN] && nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0)
++	if (attrs[MACSEC_SA_ATTR_PN] &&
++	    *(u64 *)nla_data(attrs[MACSEC_SA_ATTR_PN]) == 0)
+ 		return false;
+ 
+ 	if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
+@@ -1666,6 +1684,7 @@ static int macsec_add_rxsa(struct sk_buff *skb, struct genl_info *info)
+ 	struct macsec_rx_sc *rx_sc;
+ 	struct macsec_rx_sa *rx_sa;
+ 	unsigned char assoc_num;
++	int pn_len;
+ 	struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
+ 	struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
+ 	int err;
+@@ -1698,6 +1717,29 @@ static int macsec_add_rxsa(struct sk_buff *skb, struct genl_info *info)
+ 		return -EINVAL;
+ 	}
+ 
++	pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
++	if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
++		pr_notice("macsec: nl: add_rxsa: bad pn length: %d != %d\n",
++			  nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
++		rtnl_unlock();
++		return -EINVAL;
++	}
++
++	if (secy->xpn) {
++		if (!tb_sa[MACSEC_SA_ATTR_SSCI] || !tb_sa[MACSEC_SA_ATTR_SALT]) {
++			rtnl_unlock();
++			return -EINVAL;
++		}
++
++		if (nla_len(tb_sa[MACSEC_SA_ATTR_SALT]) != MACSEC_SALT_LEN) {
++			pr_notice("macsec: nl: add_rxsa: bad salt length: %d != %d\n",
++				  nla_len(tb_sa[MACSEC_SA_ATTR_SALT]),
++				  MACSEC_SA_ATTR_SALT);
++			rtnl_unlock();
++			return -EINVAL;
++		}
++	}
++
+ 	rx_sa = rtnl_dereference(rx_sc->sa[assoc_num]);
+ 	if (rx_sa) {
+ 		rtnl_unlock();
+@@ -1720,7 +1762,7 @@ static int macsec_add_rxsa(struct sk_buff *skb, struct genl_info *info)
+ 
+ 	if (tb_sa[MACSEC_SA_ATTR_PN]) {
+ 		spin_lock_bh(&rx_sa->lock);
+-		rx_sa->next_pn_halves.lower = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]);
++		rx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
+ 		spin_unlock_bh(&rx_sa->lock);
+ 	}
+ 
+@@ -1750,6 +1792,12 @@ static int macsec_add_rxsa(struct sk_buff *skb, struct genl_info *info)
+ 			goto cleanup;
+ 	}
+ 
++	if (secy->xpn) {
++		rx_sa->ssci = nla_get_ssci(tb_sa[MACSEC_SA_ATTR_SSCI]);
++		nla_memcpy(rx_sa->key.salt.bytes, tb_sa[MACSEC_SA_ATTR_SALT],
++			   MACSEC_SALT_LEN);
++	}
++
+ 	nla_memcpy(rx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN);
+ 	rcu_assign_pointer(rx_sc->sa[assoc_num], rx_sa);
+ 
+@@ -1874,6 +1922,7 @@ static int macsec_add_txsa(struct sk_buff *skb, struct genl_info *info)
+ 	struct macsec_tx_sc *tx_sc;
+ 	struct macsec_tx_sa *tx_sa;
+ 	unsigned char assoc_num;
++	int pn_len;
+ 	struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
+ 	bool was_operational;
+ 	int err;
+@@ -1906,6 +1955,29 @@ static int macsec_add_txsa(struct sk_buff *skb, struct genl_info *info)
+ 		return -EINVAL;
+ 	}
+ 
++	pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
++	if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
++		pr_notice("macsec: nl: add_txsa: bad pn length: %d != %d\n",
++			  nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
++		rtnl_unlock();
++		return -EINVAL;
++	}
++
++	if (secy->xpn) {
++		if (!tb_sa[MACSEC_SA_ATTR_SSCI] || !tb_sa[MACSEC_SA_ATTR_SALT]) {
++			rtnl_unlock();
++			return -EINVAL;
++		}
++
++		if (nla_len(tb_sa[MACSEC_SA_ATTR_SALT]) != MACSEC_SALT_LEN) {
++			pr_notice("macsec: nl: add_txsa: bad salt length: %d != %d\n",
++				  nla_len(tb_sa[MACSEC_SA_ATTR_SALT]),
++				  MACSEC_SA_ATTR_SALT);
++			rtnl_unlock();
++			return -EINVAL;
++		}
++	}
++
+ 	tx_sa = rtnl_dereference(tx_sc->sa[assoc_num]);
+ 	if (tx_sa) {
+ 		rtnl_unlock();
+@@ -1927,7 +1999,7 @@ static int macsec_add_txsa(struct sk_buff *skb, struct genl_info *info)
+ 	}
+ 
+ 	spin_lock_bh(&tx_sa->lock);
+-	tx_sa->next_pn_halves.lower = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]);
++	tx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
+ 	spin_unlock_bh(&tx_sa->lock);
+ 
+ 	if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
+@@ -1958,6 +2030,12 @@ static int macsec_add_txsa(struct sk_buff *skb, struct genl_info *info)
+ 			goto cleanup;
+ 	}
+ 
++	if (secy->xpn) {
++		tx_sa->ssci = nla_get_ssci(tb_sa[MACSEC_SA_ATTR_SSCI]);
++		nla_memcpy(tx_sa->key.salt.bytes, tb_sa[MACSEC_SA_ATTR_SALT],
++			   MACSEC_SALT_LEN);
++	}
++
+ 	nla_memcpy(tx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN);
+ 	rcu_assign_pointer(tx_sc->sa[assoc_num], tx_sa);
+ 
+@@ -2164,7 +2242,9 @@ static bool validate_upd_sa(struct nlattr **attrs)
+ {
+ 	if (!attrs[MACSEC_SA_ATTR_AN] ||
+ 	    attrs[MACSEC_SA_ATTR_KEY] ||
+-	    attrs[MACSEC_SA_ATTR_KEYID])
++	    attrs[MACSEC_SA_ATTR_KEYID] ||
++	    attrs[MACSEC_SA_ATTR_SSCI] ||
++	    attrs[MACSEC_SA_ATTR_SALT])
+ 		return false;
+ 
+ 	if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
+@@ -2214,9 +2294,19 @@ static int macsec_upd_txsa(struct sk_buff *skb, struct genl_info *info)
+ 	}
+ 
+ 	if (tb_sa[MACSEC_SA_ATTR_PN]) {
++		int pn_len;
++
++		pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
++		if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
++			pr_notice("macsec: nl: upd_txsa: bad pn length: %d != %d\n",
++				  nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
++			rtnl_unlock();
++			return -EINVAL;
++		}
++
+ 		spin_lock_bh(&tx_sa->lock);
+ 		prev_pn = tx_sa->next_pn_halves;
+-		tx_sa->next_pn_halves.lower = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]);
++		tx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
+ 		spin_unlock_bh(&tx_sa->lock);
+ 	}
+ 
+@@ -2300,9 +2390,19 @@ static int macsec_upd_rxsa(struct sk_buff *skb, struct genl_info *info)
+ 	}
+ 
+ 	if (tb_sa[MACSEC_SA_ATTR_PN]) {
++		int pn_len;
++
++		pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
++		if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
++			pr_notice("macsec: nl: upd_rxsa: bad pn length: %d != %d\n",
++				  nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
++			rtnl_unlock();
++			return -EINVAL;
++		}
++
+ 		spin_lock_bh(&rx_sa->lock);
+ 		prev_pn = rx_sa->next_pn_halves;
+-		rx_sa->next_pn_halves.lower = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]);
++		rx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
+ 		spin_unlock_bh(&rx_sa->lock);
+ 	}
+ 
+@@ -2749,10 +2849,10 @@ static int nla_put_secy(struct macsec_secy *secy, struct sk_buff *skb)
+ 
+ 	switch (secy->key_len) {
+ 	case MACSEC_GCM_AES_128_SAK_LEN:
+-		csid = MACSEC_DEFAULT_CIPHER_ID;
++		csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_128 : MACSEC_DEFAULT_CIPHER_ID;
+ 		break;
+ 	case MACSEC_GCM_AES_256_SAK_LEN:
+-		csid = MACSEC_CIPHER_ID_GCM_AES_256;
++		csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_256 : MACSEC_CIPHER_ID_GCM_AES_256;
+ 		break;
+ 	default:
+ 		goto cancel;
+@@ -2843,6 +2943,8 @@ dump_secy(struct macsec_secy *secy, struct net_device *dev,
+ 	for (i = 0, j = 1; i < MACSEC_NUM_AN; i++) {
+ 		struct macsec_tx_sa *tx_sa = rtnl_dereference(tx_sc->sa[i]);
+ 		struct nlattr *txsa_nest;
++		u64 pn;
++		int pn_len;
+ 
+ 		if (!tx_sa)
+ 			continue;
+@@ -2853,9 +2955,18 @@ dump_secy(struct macsec_secy *secy, struct net_device *dev,
+ 			goto nla_put_failure;
+ 		}
+ 
++		if (secy->xpn) {
++			pn = tx_sa->next_pn;
++			pn_len = MACSEC_XPN_PN_LEN;
++		} else {
++			pn = tx_sa->next_pn_halves.lower;
++			pn_len = MACSEC_DEFAULT_PN_LEN;
++		}
++
+ 		if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) ||
+-		    nla_put_u32(skb, MACSEC_SA_ATTR_PN, tx_sa->next_pn_halves.lower) ||
++		    nla_put(skb, MACSEC_SA_ATTR_PN, pn_len, &pn) ||
+ 		    nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, tx_sa->key.id) ||
++		    (secy->xpn && nla_put_ssci(skb, MACSEC_SA_ATTR_SSCI, tx_sa->ssci)) ||
+ 		    nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, tx_sa->active)) {
+ 			nla_nest_cancel(skb, txsa_nest);
+ 			nla_nest_cancel(skb, txsa_list);
+@@ -2928,6 +3039,8 @@ dump_secy(struct macsec_secy *secy, struct net_device *dev,
+ 		for (i = 0, k = 1; i < MACSEC_NUM_AN; i++) {
+ 			struct macsec_rx_sa *rx_sa = rtnl_dereference(rx_sc->sa[i]);
+ 			struct nlattr *rxsa_nest;
++			u64 pn;
++			int pn_len;
+ 
+ 			if (!rx_sa)
+ 				continue;
+@@ -2957,9 +3070,18 @@ dump_secy(struct macsec_secy *secy, struct net_device *dev,
+ 			}
+ 			nla_nest_end(skb, attr);
+ 
++			if (secy->xpn) {
++				pn = rx_sa->next_pn;
++				pn_len = MACSEC_XPN_PN_LEN;
++			} else {
++				pn = rx_sa->next_pn_halves.lower;
++				pn_len = MACSEC_DEFAULT_PN_LEN;
++			}
++
+ 			if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) ||
+-			    nla_put_u32(skb, MACSEC_SA_ATTR_PN, rx_sa->next_pn_halves.lower) ||
++			    nla_put(skb, MACSEC_SA_ATTR_PN, pn_len, &pn) ||
+ 			    nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, rx_sa->key.id) ||
++			    (secy->xpn && nla_put_ssci(skb, MACSEC_SA_ATTR_SSCI, rx_sa->ssci)) ||
+ 			    nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, rx_sa->active)) {
+ 				nla_nest_cancel(skb, rxsa_nest);
+ 				nla_nest_cancel(skb, rxsc_nest);
+@@ -3503,9 +3625,19 @@ static int macsec_changelink_common(struct net_device *dev,
+ 		case MACSEC_CIPHER_ID_GCM_AES_128:
+ 		case MACSEC_DEFAULT_CIPHER_ID:
+ 			secy->key_len = MACSEC_GCM_AES_128_SAK_LEN;
++			secy->xpn = false;
+ 			break;
+ 		case MACSEC_CIPHER_ID_GCM_AES_256:
+ 			secy->key_len = MACSEC_GCM_AES_256_SAK_LEN;
++			secy->xpn = false;
++			break;
++		case MACSEC_CIPHER_ID_GCM_AES_XPN_128:
++			secy->key_len = MACSEC_GCM_AES_128_SAK_LEN;
++			secy->xpn = true;
++			break;
++		case MACSEC_CIPHER_ID_GCM_AES_XPN_256:
++			secy->key_len = MACSEC_GCM_AES_256_SAK_LEN;
++			secy->xpn = true;
+ 			break;
+ 		default:
+ 			return -EINVAL;
+@@ -3695,6 +3827,7 @@ static int macsec_add_dev(struct net_device *dev, sci_t sci, u8 icv_len)
+ 	secy->validate_frames = MACSEC_VALIDATE_DEFAULT;
+ 	secy->protect_frames = true;
+ 	secy->replay_protect = false;
++	secy->xpn = DEFAULT_XPN;
+ 
+ 	secy->sci = sci;
+ 	secy->tx_sc.active = true;
+@@ -3824,6 +3957,8 @@ static int macsec_validate_attr(struct nlattr *tb[], struct nlattr *data[],
+ 	switch (csid) {
+ 	case MACSEC_CIPHER_ID_GCM_AES_128:
+ 	case MACSEC_CIPHER_ID_GCM_AES_256:
++	case MACSEC_CIPHER_ID_GCM_AES_XPN_128:
++	case MACSEC_CIPHER_ID_GCM_AES_XPN_256:
+ 	case MACSEC_DEFAULT_CIPHER_ID:
+ 		if (icv_len < MACSEC_MIN_ICV_LEN ||
+ 		    icv_len > MACSEC_STD_ICV_LEN)
+@@ -3897,10 +4032,10 @@ static int macsec_fill_info(struct sk_buff *skb,
+ 
+ 	switch (secy->key_len) {
+ 	case MACSEC_GCM_AES_128_SAK_LEN:
+-		csid = MACSEC_DEFAULT_CIPHER_ID;
++		csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_128 : MACSEC_DEFAULT_CIPHER_ID;
+ 		break;
+ 	case MACSEC_GCM_AES_256_SAK_LEN:
+-		csid = MACSEC_CIPHER_ID_GCM_AES_256;
++		csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_256 : MACSEC_CIPHER_ID_GCM_AES_256;
+ 		break;
+ 	default:
+ 		goto nla_put_failure;
+diff --git a/include/net/macsec.h b/include/net/macsec.h
+index 43cd54e178770..2e4780dbf5c6a 100644
+--- a/include/net/macsec.h
++++ b/include/net/macsec.h
+@@ -11,6 +11,9 @@
+ #include <uapi/linux/if_link.h>
+ #include <uapi/linux/if_macsec.h>
+ 
++#define MACSEC_DEFAULT_PN_LEN 4
++#define MACSEC_XPN_PN_LEN 8
++
+ #define MACSEC_SALT_LEN 12
+ #define MACSEC_NUM_AN 4 /* 2 bits for the association number */
+ 
+diff --git a/include/uapi/linux/if_macsec.h b/include/uapi/linux/if_macsec.h
+index 1d63c43c38cca..3af2aa069a367 100644
+--- a/include/uapi/linux/if_macsec.h
++++ b/include/uapi/linux/if_macsec.h
+@@ -22,9 +22,11 @@
+ 
+ #define MACSEC_KEYID_LEN 16
+ 
+-/* cipher IDs as per IEEE802.1AEbn-2011 */
++/* cipher IDs as per IEEE802.1AE-2018 (Table 14-1) */
+ #define MACSEC_CIPHER_ID_GCM_AES_128 0x0080C20001000001ULL
+ #define MACSEC_CIPHER_ID_GCM_AES_256 0x0080C20001000002ULL
++#define MACSEC_CIPHER_ID_GCM_AES_XPN_128 0x0080C20001000003ULL
++#define MACSEC_CIPHER_ID_GCM_AES_XPN_256 0x0080C20001000004ULL
+ 
+ /* deprecated cipher ID for GCM-AES-128 */
+ #define MACSEC_DEFAULT_CIPHER_ID     0x0080020001000001ULL
+@@ -88,11 +90,13 @@ enum macsec_sa_attrs {
+ 	MACSEC_SA_ATTR_UNSPEC,
+ 	MACSEC_SA_ATTR_AN,     /* config/dump, u8 0..3 */
+ 	MACSEC_SA_ATTR_ACTIVE, /* config/dump, u8 0..1 */
+-	MACSEC_SA_ATTR_PN,     /* config/dump, u32 */
++	MACSEC_SA_ATTR_PN,     /* config/dump, u32/u64 (u64 if XPN) */
+ 	MACSEC_SA_ATTR_KEY,    /* config, data */
+ 	MACSEC_SA_ATTR_KEYID,  /* config/dump, 128-bit */
+ 	MACSEC_SA_ATTR_STATS,  /* dump, nested, macsec_sa_stats_attr */
+ 	MACSEC_SA_ATTR_PAD,
++	MACSEC_SA_ATTR_SSCI,   /* config/dump, u32 - XPN only */
++	MACSEC_SA_ATTR_SALT,   /* config, 96-bit - XPN only */
+ 	__MACSEC_SA_ATTR_END,
+ 	NUM_MACSEC_SA_ATTR = __MACSEC_SA_ATTR_END,
+ 	MACSEC_SA_ATTR_MAX = __MACSEC_SA_ATTR_END - 1,
+-- 
+cgit 1.2.3-1.el7
+