macsec: introduce IEEE 802.1AE driver

This is an implementation of MACsec/IEEE 802.1AE.  This driver
provides authentication and encryption of traffic in a LAN, typically
with GCM-AES-128, and optional replay protection.

http://standards.ieee.org/getieee802/download/802.1AE-2006.pdf

Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Reviewed-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3297 insertions, 0 deletions

diff --git a/drivers/net/macsec.c b/drivers/net/macsec.c
new file mode 100644
index 000000000000..84d3e5ca8817
--- /dev/null
+++ b/drivers/net/macsec.c
@@ -0,0 +1,3297 @@
+/*
+ * drivers/net/macsec.c - MACsec device
+ *
+ * Copyright (c) 2015 Sabrina Dubroca <sd@queasysnail.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/types.h>
+#include <linux/skbuff.h>
+#include <linux/socket.h>
+#include <linux/module.h>
+#include <crypto/aead.h>
+#include <linux/etherdevice.h>
+#include <linux/rtnetlink.h>
+#include <net/genetlink.h>
+#include <net/sock.h>
+
+#include <uapi/linux/if_macsec.h>
+
+typedef u64 __bitwise sci_t;
+
+#define MACSEC_SCI_LEN 8
+
+/* SecTAG length = macsec_eth_header without the optional SCI */
+#define MACSEC_TAG_LEN 6
+
+struct macsec_eth_header {
+	struct ethhdr eth;
+	/* SecTAG */
+	u8  tci_an;
+#if defined(__LITTLE_ENDIAN_BITFIELD)
+	u8  short_length:6,
+		  unused:2;
+#elif defined(__BIG_ENDIAN_BITFIELD)
+	u8        unused:2,
+	    short_length:6;
+#else
+#error	"Please fix <asm/byteorder.h>"
+#endif
+	__be32 packet_number;
+	u8 secure_channel_id[8]; /* optional */
+} __packed;
+
+#define MACSEC_TCI_VERSION 0x80
+#define MACSEC_TCI_ES      0x40 /* end station */
+#define MACSEC_TCI_SC      0x20 /* SCI present */
+#define MACSEC_TCI_SCB     0x10 /* epon */
+#define MACSEC_TCI_E       0x08 /* encryption */
+#define MACSEC_TCI_C       0x04 /* changed text */
+#define MACSEC_AN_MASK     0x03 /* association number */
+#define MACSEC_TCI_CONFID  (MACSEC_TCI_E | MACSEC_TCI_C)
+
+/* minimum secure data length deemed "not short", see IEEE 802.1AE-2006 9.7 */
+#define MIN_NON_SHORT_LEN 48
+
+#define GCM_AES_IV_LEN 12
+#define DEFAULT_ICV_LEN 16
+
+#define MACSEC_NUM_AN 4 /* 2 bits for the association number */
+
+#define for_each_rxsc(secy, sc)			\
+	for (sc = rcu_dereference_bh(secy->rx_sc);	\
+	     sc;				\
+	     sc = rcu_dereference_bh(sc->next))
+#define for_each_rxsc_rtnl(secy, sc)			\
+	for (sc = rtnl_dereference(secy->rx_sc);	\
+	     sc;					\
+	     sc = rtnl_dereference(sc->next))
+
+struct gcm_iv {
+	union {
+		u8 secure_channel_id[8];
+		sci_t sci;
+	};
+	__be32 pn;
+};
+
+/**
+ * struct macsec_key - SA key
+ * @id: user-provided key identifier
+ * @tfm: crypto struct, key storage
+ */
+struct macsec_key {
+	u64 id;
+	struct crypto_aead *tfm;
+};
+
+struct macsec_rx_sc_stats {
+	__u64 InOctetsValidated;
+	__u64 InOctetsDecrypted;
+	__u64 InPktsUnchecked;
+	__u64 InPktsDelayed;
+	__u64 InPktsOK;
+	__u64 InPktsInvalid;
+	__u64 InPktsLate;
+	__u64 InPktsNotValid;
+	__u64 InPktsNotUsingSA;
+	__u64 InPktsUnusedSA;
+};
+
+struct macsec_rx_sa_stats {
+	__u32 InPktsOK;
+	__u32 InPktsInvalid;
+	__u32 InPktsNotValid;
+	__u32 InPktsNotUsingSA;
+	__u32 InPktsUnusedSA;
+};
+
+struct macsec_tx_sa_stats {
+	__u32 OutPktsProtected;
+	__u32 OutPktsEncrypted;
+};
+
+struct macsec_tx_sc_stats {
+	__u64 OutPktsProtected;
+	__u64 OutPktsEncrypted;
+	__u64 OutOctetsProtected;
+	__u64 OutOctetsEncrypted;
+};
+
+struct macsec_dev_stats {
+	__u64 OutPktsUntagged;
+	__u64 InPktsUntagged;
+	__u64 OutPktsTooLong;
+	__u64 InPktsNoTag;
+	__u64 InPktsBadTag;
+	__u64 InPktsUnknownSCI;
+	__u64 InPktsNoSCI;
+	__u64 InPktsOverrun;
+};
+
+/**
+ * struct macsec_rx_sa - receive secure association
+ * @active:
+ * @next_pn: packet number expected for the next packet
+ * @lock: protects next_pn manipulations
+ * @key: key structure
+ * @stats: per-SA stats
+ */
+struct macsec_rx_sa {
+	struct macsec_key key;
+	spinlock_t lock;
+	u32 next_pn;
+	atomic_t refcnt;
+	bool active;
+	struct macsec_rx_sa_stats __percpu *stats;
+	struct macsec_rx_sc *sc;
+	struct rcu_head rcu;
+};
+
+struct pcpu_rx_sc_stats {
+	struct macsec_rx_sc_stats stats;
+	struct u64_stats_sync syncp;
+};
+
+/**
+ * struct macsec_rx_sc - receive secure channel
+ * @sci: secure channel identifier for this SC
+ * @active: channel is active
+ * @sa: array of secure associations
+ * @stats: per-SC stats
+ */
+struct macsec_rx_sc {
+	struct macsec_rx_sc __rcu *next;
+	sci_t sci;
+	bool active;
+	struct macsec_rx_sa __rcu *sa[MACSEC_NUM_AN];
+	struct pcpu_rx_sc_stats __percpu *stats;
+	atomic_t refcnt;
+	struct rcu_head rcu_head;
+};
+
+/**
+ * struct macsec_tx_sa - transmit secure association
+ * @active:
+ * @next_pn: packet number to use for the next packet
+ * @lock: protects next_pn manipulations
+ * @key: key structure
+ * @stats: per-SA stats
+ */
+struct macsec_tx_sa {
+	struct macsec_key key;
+	spinlock_t lock;
+	u32 next_pn;
+	atomic_t refcnt;
+	bool active;
+	struct macsec_tx_sa_stats __percpu *stats;
+	struct rcu_head rcu;
+};
+
+struct pcpu_tx_sc_stats {
+	struct macsec_tx_sc_stats stats;
+	struct u64_stats_sync syncp;
+};
+
+/**
+ * struct macsec_tx_sc - transmit secure channel
+ * @active:
+ * @encoding_sa: association number of the SA currently in use
+ * @encrypt: encrypt packets on transmit, or authenticate only
+ * @send_sci: always include the SCI in the SecTAG
+ * @end_station:
+ * @scb: single copy broadcast flag
+ * @sa: array of secure associations
+ * @stats: stats for this TXSC
+ */
+struct macsec_tx_sc {
+	bool active;
+	u8 encoding_sa;
+	bool encrypt;
+	bool send_sci;
+	bool end_station;
+	bool scb;
+	struct macsec_tx_sa __rcu *sa[MACSEC_NUM_AN];
+	struct pcpu_tx_sc_stats __percpu *stats;
+};
+
+#define MACSEC_VALIDATE_DEFAULT MACSEC_VALIDATE_STRICT
+
+/**
+ * struct macsec_secy - MACsec Security Entity
+ * @netdev: netdevice for this SecY
+ * @n_rx_sc: number of receive secure channels configured on this SecY
+ * @sci: secure channel identifier used for tx
+ * @key_len: length of keys used by the cipher suite
+ * @icv_len: length of ICV used by the cipher suite
+ * @validate_frames: validation mode
+ * @operational: MAC_Operational flag
+ * @protect_frames: enable protection for this SecY
+ * @replay_protect: enable packet number checks on receive
+ * @replay_window: size of the replay window
+ * @tx_sc: transmit secure channel
+ * @rx_sc: linked list of receive secure channels
+ */
+struct macsec_secy {
+	struct net_device *netdev;
+	unsigned int n_rx_sc;
+	sci_t sci;
+	u16 key_len;
+	u16 icv_len;
+	enum macsec_validation_type validate_frames;
+	bool operational;
+	bool protect_frames;
+	bool replay_protect;
+	u32 replay_window;
+	struct macsec_tx_sc tx_sc;
+	struct macsec_rx_sc __rcu *rx_sc;
+};
+
+struct pcpu_secy_stats {
+	struct macsec_dev_stats stats;
+	struct u64_stats_sync syncp;
+};
+
+/**
+ * struct macsec_dev - private data
+ * @secy: SecY config
+ * @real_dev: pointer to underlying netdevice
+ * @stats: MACsec device stats
+ * @secys: linked list of SecY's on the underlying device
+ */
+struct macsec_dev {
+	struct macsec_secy secy;
+	struct net_device *real_dev;
+	struct pcpu_secy_stats __percpu *stats;
+	struct list_head secys;
+};
+
+/**
+ * struct macsec_rxh_data - rx_handler private argument
+ * @secys: linked list of SecY's on this underlying device
+ */
+struct macsec_rxh_data {
+	struct list_head secys;
+};
+
+static struct macsec_dev *macsec_priv(const struct net_device *dev)
+{
+	return (struct macsec_dev *)netdev_priv(dev);
+}
+
+static struct macsec_rxh_data *macsec_data_rcu(const struct net_device *dev)
+{
+	return rcu_dereference_bh(dev->rx_handler_data);
+}
+
+static struct macsec_rxh_data *macsec_data_rtnl(const struct net_device *dev)
+{
+	return rtnl_dereference(dev->rx_handler_data);
+}
+
+struct macsec_cb {
+	struct aead_request *req;
+	union {
+		struct macsec_tx_sa *tx_sa;
+		struct macsec_rx_sa *rx_sa;
+	};
+	u8 assoc_num;
+	bool valid;
+	bool has_sci;
+};
+
+static struct macsec_rx_sa *macsec_rxsa_get(struct macsec_rx_sa __rcu *ptr)
+{
+	struct macsec_rx_sa *sa = rcu_dereference_bh(ptr);
+
+	if (!sa || !sa->active)
+		return NULL;
+
+	if (!atomic_inc_not_zero(&sa->refcnt))
+		return NULL;
+
+	return sa;
+}
+
+static void free_rx_sc_rcu(struct rcu_head *head)
+{
+	struct macsec_rx_sc *rx_sc = container_of(head, struct macsec_rx_sc, rcu_head);
+
+	free_percpu(rx_sc->stats);
+	kfree(rx_sc);
+}
+
+static struct macsec_rx_sc *macsec_rxsc_get(struct macsec_rx_sc *sc)
+{
+	return atomic_inc_not_zero(&sc->refcnt) ? sc : NULL;
+}
+
+static void macsec_rxsc_put(struct macsec_rx_sc *sc)
+{
+	if (atomic_dec_and_test(&sc->refcnt))
+		call_rcu(&sc->rcu_head, free_rx_sc_rcu);
+}
+
+static void free_rxsa(struct rcu_head *head)
+{
+	struct macsec_rx_sa *sa = container_of(head, struct macsec_rx_sa, rcu);
+
+	crypto_free_aead(sa->key.tfm);
+	free_percpu(sa->stats);
+	macsec_rxsc_put(sa->sc);
+	kfree(sa);
+}
+
+static void macsec_rxsa_put(struct macsec_rx_sa *sa)
+{
+	if (atomic_dec_and_test(&sa->refcnt))
+		call_rcu(&sa->rcu, free_rxsa);
+}
+
+static struct macsec_tx_sa *macsec_txsa_get(struct macsec_tx_sa __rcu *ptr)
+{
+	struct macsec_tx_sa *sa = rcu_dereference_bh(ptr);
+
+	if (!sa || !sa->active)
+		return NULL;
+
+	if (!atomic_inc_not_zero(&sa->refcnt))
+		return NULL;
+
+	return sa;
+}
+
+static void free_txsa(struct rcu_head *head)
+{
+	struct macsec_tx_sa *sa = container_of(head, struct macsec_tx_sa, rcu);
+
+	crypto_free_aead(sa->key.tfm);
+	free_percpu(sa->stats);
+	kfree(sa);
+}
+
+static void macsec_txsa_put(struct macsec_tx_sa *sa)
+{
+	if (atomic_dec_and_test(&sa->refcnt))
+		call_rcu(&sa->rcu, free_txsa);
+}
+
+static struct macsec_cb *macsec_skb_cb(struct sk_buff *skb)
+{
+	BUILD_BUG_ON(sizeof(struct macsec_cb) > sizeof(skb->cb));
+	return (struct macsec_cb *)skb->cb;
+}
+
+#define MACSEC_PORT_ES (htons(0x0001))
+#define MACSEC_PORT_SCB (0x0000)
+#define MACSEC_UNDEF_SCI ((__force sci_t)0xffffffffffffffffULL)
+
+#define DEFAULT_SAK_LEN 16
+#define DEFAULT_SEND_SCI true
+#define DEFAULT_ENCRYPT false
+#define DEFAULT_ENCODING_SA 0
+
+static sci_t make_sci(u8 *addr, __be16 port)
+{
+	sci_t sci;
+
+	memcpy(&sci, addr, ETH_ALEN);
+	memcpy(((char *)&sci) + ETH_ALEN, &port, sizeof(port));
+
+	return sci;
+}
+
+static sci_t macsec_frame_sci(struct macsec_eth_header *hdr, bool sci_present)
+{
+	sci_t sci;
+
+	if (sci_present)
+		memcpy(&sci, hdr->secure_channel_id,
+		       sizeof(hdr->secure_channel_id));
+	else
+		sci = make_sci(hdr->eth.h_source, MACSEC_PORT_ES);
+
+	return sci;
+}
+
+static unsigned int macsec_sectag_len(bool sci_present)
+{
+	return MACSEC_TAG_LEN + (sci_present ? MACSEC_SCI_LEN : 0);
+}
+
+static unsigned int macsec_hdr_len(bool sci_present)
+{
+	return macsec_sectag_len(sci_present) + ETH_HLEN;
+}
+
+static unsigned int macsec_extra_len(bool sci_present)
+{
+	return macsec_sectag_len(sci_present) + sizeof(__be16);
+}
+
+/* Fill SecTAG according to IEEE 802.1AE-2006 10.5.3 */
+static void macsec_fill_sectag(struct macsec_eth_header *h,
+			       const struct macsec_secy *secy, u32 pn)
+{
+	const struct macsec_tx_sc *tx_sc = &secy->tx_sc;
+
+	memset(&h->tci_an, 0, macsec_sectag_len(tx_sc->send_sci));
+	h->eth.h_proto = htons(ETH_P_MACSEC);
+
+	if (tx_sc->send_sci ||
+	    (secy->n_rx_sc > 1 && !tx_sc->end_station && !tx_sc->scb)) {
+		h->tci_an |= MACSEC_TCI_SC;
+		memcpy(&h->secure_channel_id, &secy->sci,
+		       sizeof(h->secure_channel_id));
+	} else {
+		if (tx_sc->end_station)
+			h->tci_an |= MACSEC_TCI_ES;
+		if (tx_sc->scb)
+			h->tci_an |= MACSEC_TCI_SCB;
+	}
+
+	h->packet_number = htonl(pn);
+
+	/* with GCM, C/E clear for !encrypt, both set for encrypt */
+	if (tx_sc->encrypt)
+		h->tci_an |= MACSEC_TCI_CONFID;
+	else if (secy->icv_len != DEFAULT_ICV_LEN)
+		h->tci_an |= MACSEC_TCI_C;
+
+	h->tci_an |= tx_sc->encoding_sa;
+}
+
+static void macsec_set_shortlen(struct macsec_eth_header *h, size_t data_len)
+{
+	if (data_len < MIN_NON_SHORT_LEN)
+		h->short_length = data_len;
+}
+
+/* validate MACsec packet according to IEEE 802.1AE-2006 9.12 */
+static bool macsec_validate_skb(struct sk_buff *skb, u16 icv_len)
+{
+	struct macsec_eth_header *h = (struct macsec_eth_header *)skb->data;
+	int len = skb->len - 2 * ETH_ALEN;
+	int extra_len = macsec_extra_len(!!(h->tci_an & MACSEC_TCI_SC)) + icv_len;
+
+	/* a) It comprises at least 17 octets */
+	if (skb->len <= 16)
+		return false;
+
+	/* b) MACsec EtherType: already checked */
+
+	/* c) V bit is clear */
+	if (h->tci_an & MACSEC_TCI_VERSION)
+		return false;
+
+	/* d) ES or SCB => !SC */
+	if ((h->tci_an & MACSEC_TCI_ES || h->tci_an & MACSEC_TCI_SCB) &&
+	    (h->tci_an & MACSEC_TCI_SC))
+		return false;
+
+	/* e) Bits 7 and 8 of octet 4 of the SecTAG are clear */
+	if (h->unused)
+		return false;
+
+	/* rx.pn != 0 (figure 10-5) */
+	if (!h->packet_number)
+		return false;
+
+	/* length check, f) g) h) i) */
+	if (h->short_length)
+		return len == extra_len + h->short_length;
+	return len >= extra_len + MIN_NON_SHORT_LEN;
+}
+
+#define MACSEC_NEEDED_HEADROOM (macsec_extra_len(true))
+#define MACSEC_NEEDED_TAILROOM MACSEC_MAX_ICV_LEN
+
+static void macsec_fill_iv(unsigned char *iv, sci_t sci, u32 pn)
+{
+	struct gcm_iv *gcm_iv = (struct gcm_iv *)iv;
+
+	gcm_iv->sci = sci;
+	gcm_iv->pn = htonl(pn);
+}
+
+static struct macsec_eth_header *macsec_ethhdr(struct sk_buff *skb)
+{
+	return (struct macsec_eth_header *)skb_mac_header(skb);
+}
+
+static u32 tx_sa_update_pn(struct macsec_tx_sa *tx_sa, struct macsec_secy *secy)
+{
+	u32 pn;
+
+	spin_lock_bh(&tx_sa->lock);
+	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;
+	}
+	spin_unlock_bh(&tx_sa->lock);
+
+	return pn;
+}
+
+static void macsec_encrypt_finish(struct sk_buff *skb, struct net_device *dev)
+{
+	struct macsec_dev *macsec = netdev_priv(dev);
+
+	skb->dev = macsec->real_dev;
+	skb_reset_mac_header(skb);
+	skb->protocol = eth_hdr(skb)->h_proto;
+}
+
+static void macsec_count_tx(struct sk_buff *skb, struct macsec_tx_sc *tx_sc,
+			    struct macsec_tx_sa *tx_sa)
+{
+	struct pcpu_tx_sc_stats *txsc_stats = this_cpu_ptr(tx_sc->stats);
+
+	u64_stats_update_begin(&txsc_stats->syncp);
+	if (tx_sc->encrypt) {
+		txsc_stats->stats.OutOctetsEncrypted += skb->len;
+		txsc_stats->stats.OutPktsEncrypted++;
+		this_cpu_inc(tx_sa->stats->OutPktsEncrypted);
+	} else {
+		txsc_stats->stats.OutOctetsProtected += skb->len;
+		txsc_stats->stats.OutPktsProtected++;
+		this_cpu_inc(tx_sa->stats->OutPktsProtected);
+	}
+	u64_stats_update_end(&txsc_stats->syncp);
+}
+
+static void count_tx(struct net_device *dev, int ret, int len)
+{
+	if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
+		struct pcpu_sw_netstats *stats = this_cpu_ptr(dev->tstats);
+
+		u64_stats_update_begin(&stats->syncp);
+		stats->tx_packets++;
+		stats->tx_bytes += len;
+		u64_stats_update_end(&stats->syncp);
+	} else {
+		dev->stats.tx_dropped++;
+	}
+}
+
+static void macsec_encrypt_done(struct crypto_async_request *base, int err)
+{
+	struct sk_buff *skb = base->data;
+	struct net_device *dev = skb->dev;
+	struct macsec_dev *macsec = macsec_priv(dev);
+	struct macsec_tx_sa *sa = macsec_skb_cb(skb)->tx_sa;
+	int len, ret;
+
+	aead_request_free(macsec_skb_cb(skb)->req);
+
+	rcu_read_lock_bh();
+	macsec_encrypt_finish(skb, dev);
+	macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa);
+	len = skb->len;
+	ret = dev_queue_xmit(skb);
+	count_tx(dev, ret, len);
+	rcu_read_unlock_bh();
+
+	macsec_txsa_put(sa);
+	dev_put(dev);
+}
+
+static struct sk_buff *macsec_encrypt(struct sk_buff *skb,
+				      struct net_device *dev)
+{
+	int ret;
+	struct scatterlist sg[MAX_SKB_FRAGS + 1];
+	unsigned char iv[GCM_AES_IV_LEN];
+	struct ethhdr *eth;
+	struct macsec_eth_header *hh;
+	size_t unprotected_len;
+	struct aead_request *req;
+	struct macsec_secy *secy;
+	struct macsec_tx_sc *tx_sc;
+	struct macsec_tx_sa *tx_sa;
+	struct macsec_dev *macsec = macsec_priv(dev);
+	u32 pn;
+
+	secy = &macsec->secy;
+	tx_sc = &secy->tx_sc;
+
+	/* 10.5.1 TX SA assignment */
+	tx_sa = macsec_txsa_get(tx_sc->sa[tx_sc->encoding_sa]);
+	if (!tx_sa) {
+		secy->operational = false;
+		kfree_skb(skb);
+		return ERR_PTR(-EINVAL);
+	}
+
+	if (unlikely(skb_headroom(skb) < MACSEC_NEEDED_HEADROOM ||
+		     skb_tailroom(skb) < MACSEC_NEEDED_TAILROOM)) {
+		struct sk_buff *nskb = skb_copy_expand(skb,
+						       MACSEC_NEEDED_HEADROOM,
+						       MACSEC_NEEDED_TAILROOM,
+						       GFP_ATOMIC);
+		if (likely(nskb)) {
+			consume_skb(skb);
+			skb = nskb;
+		} else {
+			macsec_txsa_put(tx_sa);
+			kfree_skb(skb);
+			return ERR_PTR(-ENOMEM);
+		}
+	} else {
+		skb = skb_unshare(skb, GFP_ATOMIC);
+		if (!skb) {
+			macsec_txsa_put(tx_sa);
+			return ERR_PTR(-ENOMEM);
+		}
+	}
+
+	unprotected_len = skb->len;
+	eth = eth_hdr(skb);
+	hh = (struct macsec_eth_header *)skb_push(skb, macsec_extra_len(tx_sc->send_sci));
+	memmove(hh, eth, 2 * ETH_ALEN);
+
+	pn = tx_sa_update_pn(tx_sa, secy);
+	if (pn == 0) {
+		macsec_txsa_put(tx_sa);
+		kfree_skb(skb);
+		return ERR_PTR(-ENOLINK);
+	}
+	macsec_fill_sectag(hh, secy, pn);
+	macsec_set_shortlen(hh, unprotected_len - 2 * ETH_ALEN);
+
+	macsec_fill_iv(iv, secy->sci, pn);
+
+	skb_put(skb, secy->icv_len);
+
+	if (skb->len - ETH_HLEN > macsec_priv(dev)->real_dev->mtu) {
+		struct pcpu_secy_stats *secy_stats = this_cpu_ptr(macsec->stats);
+
+		u64_stats_update_begin(&secy_stats->syncp);
+		secy_stats->stats.OutPktsTooLong++;
+		u64_stats_update_end(&secy_stats->syncp);
+
+		macsec_txsa_put(tx_sa);
+		kfree_skb(skb);
+		return ERR_PTR(-EINVAL);
+	}
+
+	req = aead_request_alloc(tx_sa->key.tfm, GFP_ATOMIC);
+	if (!req) {
+		macsec_txsa_put(tx_sa);
+		kfree_skb(skb);
+		return ERR_PTR(-ENOMEM);
+	}
+
+	sg_init_table(sg, MAX_SKB_FRAGS + 1);
+	skb_to_sgvec(skb, sg, 0, skb->len);
+
+	if (tx_sc->encrypt) {
+		int len = skb->len - macsec_hdr_len(tx_sc->send_sci) -
+			  secy->icv_len;
+		aead_request_set_crypt(req, sg, sg, len, iv);
+		aead_request_set_ad(req, macsec_hdr_len(tx_sc->send_sci));
+	} else {
+		aead_request_set_crypt(req, sg, sg, 0, iv);
+		aead_request_set_ad(req, skb->len - secy->icv_len);
+	}
+
+	macsec_skb_cb(skb)->req = req;
+	macsec_skb_cb(skb)->tx_sa = tx_sa;
+	aead_request_set_callback(req, 0, macsec_encrypt_done, skb);
+
+	dev_hold(skb->dev);
+	ret = crypto_aead_encrypt(req);
+	if (ret == -EINPROGRESS) {
+		return ERR_PTR(ret);
+	} else if (ret != 0) {
+		dev_put(skb->dev);
+		kfree_skb(skb);
+		aead_request_free(req);
+		macsec_txsa_put(tx_sa);
+		return ERR_PTR(-EINVAL);
+	}
+
+	dev_put(skb->dev);
+	aead_request_free(req);
+	macsec_txsa_put(tx_sa);
+
+	return skb;
+}
+
+static bool macsec_post_decrypt(struct sk_buff *skb, struct macsec_secy *secy, u32 pn)
+{
+	struct macsec_rx_sa *rx_sa = macsec_skb_cb(skb)->rx_sa;
+	struct pcpu_rx_sc_stats *rxsc_stats = this_cpu_ptr(rx_sa->sc->stats);
+	struct macsec_eth_header *hdr = macsec_ethhdr(skb);
+	u32 lowest_pn = 0;
+
+	spin_lock(&rx_sa->lock);
+	if (rx_sa->next_pn >= secy->replay_window)
+		lowest_pn = rx_sa->next_pn - secy->replay_window;
+
+	/* Now perform replay protection check again
+	 * (see IEEE 802.1AE-2006 figure 10-5)
+	 */
+	if (secy->replay_protect && pn < lowest_pn) {
+		spin_unlock(&rx_sa->lock);
+		u64_stats_update_begin(&rxsc_stats->syncp);
+		rxsc_stats->stats.InPktsLate++;
+		u64_stats_update_end(&rxsc_stats->syncp);
+		return false;
+	}
+
+	if (secy->validate_frames != MACSEC_VALIDATE_DISABLED) {
+		u64_stats_update_begin(&rxsc_stats->syncp);
+		if (hdr->tci_an & MACSEC_TCI_E)
+			rxsc_stats->stats.InOctetsDecrypted += skb->len;
+		else
+			rxsc_stats->stats.InOctetsValidated += skb->len;
+		u64_stats_update_end(&rxsc_stats->syncp);
+	}
+
+	if (!macsec_skb_cb(skb)->valid) {
+		spin_unlock(&rx_sa->lock);
+
+		/* 10.6.5 */
+		if (hdr->tci_an & MACSEC_TCI_C ||
+		    secy->validate_frames == MACSEC_VALIDATE_STRICT) {
+			u64_stats_update_begin(&rxsc_stats->syncp);
+			rxsc_stats->stats.InPktsNotValid++;
+			u64_stats_update_end(&rxsc_stats->syncp);
+			return false;
+		}
+
+		u64_stats_update_begin(&rxsc_stats->syncp);
+		if (secy->validate_frames == MACSEC_VALIDATE_CHECK) {
+			rxsc_stats->stats.InPktsInvalid++;
+			this_cpu_inc(rx_sa->stats->InPktsInvalid);
+		} else if (pn < lowest_pn) {
+			rxsc_stats->stats.InPktsDelayed++;
+		} else {
+			rxsc_stats->stats.InPktsUnchecked++;
+		}
+		u64_stats_update_end(&rxsc_stats->syncp);
+	} else {
+		u64_stats_update_begin(&rxsc_stats->syncp);
+		if (pn < lowest_pn) {
+			rxsc_stats->stats.InPktsDelayed++;
+		} else {
+			rxsc_stats->stats.InPktsOK++;
+			this_cpu_inc(rx_sa->stats->InPktsOK);
+		}
+		u64_stats_update_end(&rxsc_stats->syncp);
+
+		if (pn >= rx_sa->next_pn)
+			rx_sa->next_pn = pn + 1;
+		spin_unlock(&rx_sa->lock);
+	}
+
+	return true;
+}
+
+static void macsec_reset_skb(struct sk_buff *skb, struct net_device *dev)
+{
+	skb->pkt_type = PACKET_HOST;
+	skb->protocol = eth_type_trans(skb, dev);
+
+	skb_reset_network_header(skb);
+	if (!skb_transport_header_was_set(skb))
+		skb_reset_transport_header(skb);
+	skb_reset_mac_len(skb);
+}
+
+static void macsec_finalize_skb(struct sk_buff *skb, u8 icv_len, u8 hdr_len)
+{
+	memmove(skb->data + hdr_len, skb->data, 2 * ETH_ALEN);
+	skb_pull(skb, hdr_len);
+	pskb_trim_unique(skb, skb->len - icv_len);
+}
+
+static void count_rx(struct net_device *dev, int len)
+{
+	struct pcpu_sw_netstats *stats = this_cpu_ptr(dev->tstats);
+
+	u64_stats_update_begin(&stats->syncp);
+	stats->rx_packets++;
+	stats->rx_bytes += len;
+	u64_stats_update_end(&stats->syncp);
+}
+
+static void macsec_decrypt_done(struct crypto_async_request *base, int err)
+{
+	struct sk_buff *skb = base->data;
+	struct net_device *dev = skb->dev;
+	struct macsec_dev *macsec = macsec_priv(dev);
+	struct macsec_rx_sa *rx_sa = macsec_skb_cb(skb)->rx_sa;
+	int len, ret;
+	u32 pn;
+
+	aead_request_free(macsec_skb_cb(skb)->req);
+
+	rcu_read_lock_bh();
+	pn = ntohl(macsec_ethhdr(skb)->packet_number);
+	if (!macsec_post_decrypt(skb, &macsec->secy, pn)) {
+		rcu_read_unlock_bh();
+		kfree_skb(skb);
+		goto out;
+	}
+
+	macsec_finalize_skb(skb, macsec->secy.icv_len,
+			    macsec_extra_len(macsec_skb_cb(skb)->has_sci));
+	macsec_reset_skb(skb, macsec->secy.netdev);
+
+	len = skb->len;
+	ret = netif_rx(skb);
+	if (ret == NET_RX_SUCCESS)
+		count_rx(dev, len);
+	else
+		macsec->secy.netdev->stats.rx_dropped++;
+
+	rcu_read_unlock_bh();
+
+out:
+	macsec_rxsa_put(rx_sa);
+	dev_put(dev);
+	return;
+}
+
+static struct sk_buff *macsec_decrypt(struct sk_buff *skb,
+				      struct net_device *dev,
+				      struct macsec_rx_sa *rx_sa,
+				      sci_t sci,
+				      struct macsec_secy *secy)
+{
+	int ret;
+	struct scatterlist sg[MAX_SKB_FRAGS + 1];
+	unsigned char iv[GCM_AES_IV_LEN];
+	struct aead_request *req;
+	struct macsec_eth_header *hdr;
+	u16 icv_len = secy->icv_len;
+
+	macsec_skb_cb(skb)->valid = false;
+	skb = skb_share_check(skb, GFP_ATOMIC);
+	if (!skb)
+		return NULL;
+
+	req = aead_request_alloc(rx_sa->key.tfm, GFP_ATOMIC);
+	if (!req) {
+		kfree_skb(skb);
+		return NULL;
+	}
+
+	hdr = (struct macsec_eth_header *)skb->data;
+	macsec_fill_iv(iv, sci, ntohl(hdr->packet_number));
+
+	sg_init_table(sg, MAX_SKB_FRAGS + 1);
+	skb_to_sgvec(skb, sg, 0, skb->len);
+
+	if (hdr->tci_an & MACSEC_TCI_E) {
+		/* confidentiality: ethernet + macsec header
+		 * authenticated, encrypted payload
+		 */
+		int len = skb->len - macsec_hdr_len(macsec_skb_cb(skb)->has_sci);
+
+		aead_request_set_crypt(req, sg, sg, len, iv);
+		aead_request_set_ad(req, macsec_hdr_len(macsec_skb_cb(skb)->has_sci));
+		skb = skb_unshare(skb, GFP_ATOMIC);
+		if (!skb) {
+			aead_request_free(req);
+			return NULL;
+		}
+	} else {
+		/* integrity only: all headers + data authenticated */
+		aead_request_set_crypt(req, sg, sg, icv_len, iv);
+		aead_request_set_ad(req, skb->len - icv_len);
+	}
+
+	macsec_skb_cb(skb)->req = req;
+	macsec_skb_cb(skb)->rx_sa = rx_sa;
+	skb->dev = dev;
+	aead_request_set_callback(req, 0, macsec_decrypt_done, skb);
+
+	dev_hold(dev);
+	ret = crypto_aead_decrypt(req);
+	if (ret == -EINPROGRESS) {
+		return NULL;
+	} else if (ret != 0) {
+		/* decryption/authentication failed
+		 * 10.6 if validateFrames is disabled, deliver anyway
+		 */
+		if (ret != -EBADMSG) {
+			kfree_skb(skb);
+			skb = NULL;
+		}
+	} else {
+		macsec_skb_cb(skb)->valid = true;
+	}
+	dev_put(dev);
+
+	aead_request_free(req);
+
+	return skb;
+}
+
+static struct macsec_rx_sc *find_rx_sc(struct macsec_secy *secy, sci_t sci)
+{
+	struct macsec_rx_sc *rx_sc;
+
+	for_each_rxsc(secy, rx_sc) {
+		if (rx_sc->sci == sci)
+			return rx_sc;
+	}
+
+	return NULL;
+}
+
+static struct macsec_rx_sc *find_rx_sc_rtnl(struct macsec_secy *secy, sci_t sci)
+{
+	struct macsec_rx_sc *rx_sc;
+
+	for_each_rxsc_rtnl(secy, rx_sc) {
+		if (rx_sc->sci == sci)
+			return rx_sc;
+	}
+
+	return NULL;
+}
+
+static void handle_not_macsec(struct sk_buff *skb)
+{
+	struct macsec_rxh_data *rxd;
+	struct macsec_dev *macsec;
+
+	rcu_read_lock();
+	rxd = macsec_data_rcu(skb->dev);
+
+	/* 10.6 If the management control validateFrames is not
+	 * Strict, frames without a SecTAG are received, counted, and
+	 * delivered to the Controlled Port
+	 */
+	list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
+		struct sk_buff *nskb;
+		int ret;
+		struct pcpu_secy_stats *secy_stats = this_cpu_ptr(macsec->stats);
+
+		if (macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) {
+			u64_stats_update_begin(&secy_stats->syncp);
+			secy_stats->stats.InPktsNoTag++;
+			u64_stats_update_end(&secy_stats->syncp);
+			continue;
+		}
+
+		/* deliver on this port */
+		nskb = skb_clone(skb, GFP_ATOMIC);
+		if (!nskb)
+			break;
+
+		nskb->dev = macsec->secy.netdev;
+
+		ret = netif_rx(nskb);
+		if (ret == NET_RX_SUCCESS) {
+			u64_stats_update_begin(&secy_stats->syncp);
+			secy_stats->stats.InPktsUntagged++;
+			u64_stats_update_end(&secy_stats->syncp);
+		} else {
+			macsec->secy.netdev->stats.rx_dropped++;
+		}
+	}
+
+	rcu_read_unlock();
+}
+
+static rx_handler_result_t macsec_handle_frame(struct sk_buff **pskb)
+{
+	struct sk_buff *skb = *pskb;
+	struct net_device *dev = skb->dev;
+	struct macsec_eth_header *hdr;
+	struct macsec_secy *secy = NULL;
+	struct macsec_rx_sc *rx_sc;
+	struct macsec_rx_sa *rx_sa;
+	struct macsec_rxh_data *rxd;
+	struct macsec_dev *macsec;
+	sci_t sci;
+	u32 pn;
+	bool cbit;
+	struct pcpu_rx_sc_stats *rxsc_stats;
+	struct pcpu_secy_stats *secy_stats;
+	bool pulled_sci;
+
+	if (skb_headroom(skb) < ETH_HLEN)
+		goto drop_direct;
+
+	hdr = macsec_ethhdr(skb);
+	if (hdr->eth.h_proto != htons(ETH_P_MACSEC)) {
+		handle_not_macsec(skb);
+
+		/* and deliver to the uncontrolled port */
+		return RX_HANDLER_PASS;
+	}
+
+	skb = skb_unshare(skb, GFP_ATOMIC);
+	if (!skb) {
+		*pskb = NULL;
+		return RX_HANDLER_CONSUMED;
+	}
+
+	pulled_sci = pskb_may_pull(skb, macsec_extra_len(true));
+	if (!pulled_sci) {
+		if (!pskb_may_pull(skb, macsec_extra_len(false)))
+			goto drop_direct;
+	}
+
+	hdr = macsec_ethhdr(skb);
+
+	/* Frames with a SecTAG that has the TCI E bit set but the C
+	 * bit clear are discarded, as this reserved encoding is used
+	 * to identify frames with a SecTAG that are not to be
+	 * delivered to the Controlled Port.
+	 */
+	if ((hdr->tci_an & (MACSEC_TCI_C | MACSEC_TCI_E)) == MACSEC_TCI_E)
+		return RX_HANDLER_PASS;
+
+	/* now, pull the extra length */
+	if (hdr->tci_an & MACSEC_TCI_SC) {
+		if (!pulled_sci)
+			goto drop_direct;
+	}
+
+	/* ethernet header is part of crypto processing */
+	skb_push(skb, ETH_HLEN);
+
+	macsec_skb_cb(skb)->has_sci = !!(hdr->tci_an & MACSEC_TCI_SC);
+	macsec_skb_cb(skb)->assoc_num = hdr->tci_an & MACSEC_AN_MASK;
+	sci = macsec_frame_sci(hdr, macsec_skb_cb(skb)->has_sci);
+
+	rcu_read_lock();
+	rxd = macsec_data_rcu(skb->dev);
+
+	list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
+		struct macsec_rx_sc *sc = find_rx_sc(&macsec->secy, sci);
+
+		if (sc) {
+			secy = &macsec->secy;
+			rx_sc = sc;
+			break;
+		}
+	}
+
+	if (!secy)
+		goto nosci;
+
+	dev = secy->netdev;
+	macsec = macsec_priv(dev);
+	secy_stats = this_cpu_ptr(macsec->stats);
+	rxsc_stats = this_cpu_ptr(rx_sc->stats);
+
+	if (!macsec_validate_skb(skb, secy->icv_len)) {
+		u64_stats_update_begin(&secy_stats->syncp);
+		secy_stats->stats.InPktsBadTag++;
+		u64_stats_update_end(&secy_stats->syncp);
+		goto drop_nosa;
+	}
+
+	rx_sa = macsec_rxsa_get(rx_sc->sa[macsec_skb_cb(skb)->assoc_num]);
+	if (!rx_sa) {
+		/* 10.6.1 if the SA is not in use */
+
+		/* If validateFrames is Strict or the C bit in the
+		 * SecTAG is set, discard
+		 */
+		if (hdr->tci_an & MACSEC_TCI_C ||
+		    secy->validate_frames == MACSEC_VALIDATE_STRICT) {
+			u64_stats_update_begin(&rxsc_stats->syncp);
+			rxsc_stats->stats.InPktsNotUsingSA++;
+			u64_stats_update_end(&rxsc_stats->syncp);
+			goto drop_nosa;
+		}
+
+		/* not Strict, the frame (with the SecTAG and ICV
+		 * removed) is delivered to the Controlled Port.
+		 */
+		u64_stats_update_begin(&rxsc_stats->syncp);
+		rxsc_stats->stats.InPktsUnusedSA++;
+		u64_stats_update_end(&rxsc_stats->syncp);
+		goto deliver;
+	}
+
+	/* First, PN check to avoid decrypting obviously wrong packets */
+	pn = ntohl(hdr->packet_number);
+	if (secy->replay_protect) {
+		bool late;
+
+		spin_lock(&rx_sa->lock);
+		late = rx_sa->next_pn >= secy->replay_window &&
+		       pn < (rx_sa->next_pn - secy->replay_window);
+		spin_unlock(&rx_sa->lock);
+
+		if (late) {
+			u64_stats_update_begin(&rxsc_stats->syncp);
+			rxsc_stats->stats.InPktsLate++;
+			u64_stats_update_end(&rxsc_stats->syncp);
+			goto drop;
+		}
+	}
+
+	/* Disabled && !changed text => skip validation */
+	if (hdr->tci_an & MACSEC_TCI_C ||
+	    secy->validate_frames != MACSEC_VALIDATE_DISABLED)
+		skb = macsec_decrypt(skb, dev, rx_sa, sci, secy);
+
+	if (!skb) {
+		macsec_rxsa_put(rx_sa);
+		rcu_read_unlock();
+		*pskb = NULL;
+		return RX_HANDLER_CONSUMED;
+	}
+
+	if (!macsec_post_decrypt(skb, secy, pn))
+		goto drop;
+
+deliver:
+	macsec_finalize_skb(skb, secy->icv_len,
+			    macsec_extra_len(macsec_skb_cb(skb)->has_sci));
+	macsec_reset_skb(skb, secy->netdev);
+
+	macsec_rxsa_put(rx_sa);
+	count_rx(dev, skb->len);
+
+	rcu_read_unlock();
+
+	*pskb = skb;
+	return RX_HANDLER_ANOTHER;
+
+drop:
+	macsec_rxsa_put(rx_sa);
+drop_nosa:
+	rcu_read_unlock();
+drop_direct:
+	kfree_skb(skb);
+	*pskb = NULL;
+	return RX_HANDLER_CONSUMED;
+
+nosci:
+	/* 10.6.1 if the SC is not found */
+	cbit = !!(hdr->tci_an & MACSEC_TCI_C);
+	if (!cbit)
+		macsec_finalize_skb(skb, DEFAULT_ICV_LEN,
+				    macsec_extra_len(macsec_skb_cb(skb)->has_sci));
+
+	list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
+		struct sk_buff *nskb;
+		int ret;
+
+		secy_stats = this_cpu_ptr(macsec->stats);
+
+		/* If validateFrames is Strict or the C bit in the
+		 * SecTAG is set, discard
+		 */
+		if (cbit ||
+		    macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) {
+			u64_stats_update_begin(&secy_stats->syncp);
+			secy_stats->stats.InPktsNoSCI++;
+			u64_stats_update_end(&secy_stats->syncp);
+			continue;
+		}
+
+		/* not strict, the frame (with the SecTAG and ICV
+		 * removed) is delivered to the Controlled Port.
+		 */
+		nskb = skb_clone(skb, GFP_ATOMIC);
+		if (!nskb)
+			break;
+
+		macsec_reset_skb(nskb, macsec->secy.netdev);
+
+		ret = netif_rx(nskb);
+		if (ret == NET_RX_SUCCESS) {
+			u64_stats_update_begin(&secy_stats->syncp);
+			secy_stats->stats.InPktsUnknownSCI++;
+			u64_stats_update_end(&secy_stats->syncp);
+		} else {
+			macsec->secy.netdev->stats.rx_dropped++;
+		}
+	}
+
+	rcu_read_unlock();
+	*pskb = skb;
+	return RX_HANDLER_PASS;
+}
+
+static struct crypto_aead *macsec_alloc_tfm(char *key, int key_len, int icv_len)
+{
+	struct crypto_aead *tfm;
+	int ret;
+
+	tfm = crypto_alloc_aead("gcm(aes)", 0, CRYPTO_ALG_ASYNC);
+	if (!tfm || IS_ERR(tfm))
+		return NULL;
+
+	ret = crypto_aead_setkey(tfm, key, key_len);
+	if (ret < 0) {
+		crypto_free_aead(tfm);
+		return NULL;
+	}
+
+	ret = crypto_aead_setauthsize(tfm, icv_len);
+	if (ret < 0) {
+		crypto_free_aead(tfm);
+		return NULL;
+	}
+
+	return tfm;
+}
+
+static int init_rx_sa(struct macsec_rx_sa *rx_sa, char *sak, int key_len,
+		      int icv_len)
+{
+	rx_sa->stats = alloc_percpu(struct macsec_rx_sa_stats);
+	if (!rx_sa->stats)
+		return -1;
+
+	rx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len);
+	if (!rx_sa->key.tfm) {
+		free_percpu(rx_sa->stats);
+		return -1;
+	}
+
+	rx_sa->active = false;
+	rx_sa->next_pn = 1;
+	atomic_set(&rx_sa->refcnt, 1);
+	spin_lock_init(&rx_sa->lock);
+
+	return 0;
+}
+
+static void clear_rx_sa(struct macsec_rx_sa *rx_sa)
+{
+	rx_sa->active = false;
+
+	macsec_rxsa_put(rx_sa);
+}
+
+static void free_rx_sc(struct macsec_rx_sc *rx_sc)
+{
+	int i;
+
+	for (i = 0; i < MACSEC_NUM_AN; i++) {
+		struct macsec_rx_sa *sa = rtnl_dereference(rx_sc->sa[i]);
+
+		RCU_INIT_POINTER(rx_sc->sa[i], NULL);
+		if (sa)
+			clear_rx_sa(sa);
+	}
+
+	macsec_rxsc_put(rx_sc);
+}
+
+static struct macsec_rx_sc *del_rx_sc(struct macsec_secy *secy, sci_t sci)
+{
+	struct macsec_rx_sc *rx_sc, __rcu **rx_scp;
+
+	for (rx_scp = &secy->rx_sc, rx_sc = rtnl_dereference(*rx_scp);
+	     rx_sc;
+	     rx_scp = &rx_sc->next, rx_sc = rtnl_dereference(*rx_scp)) {
+		if (rx_sc->sci == sci) {
+			if (rx_sc->active)
+				secy->n_rx_sc--;
+			rcu_assign_pointer(*rx_scp, rx_sc->next);
+			return rx_sc;
+		}
+	}
+
+	return NULL;
+}
+
+static struct macsec_rx_sc *create_rx_sc(struct net_device *dev, sci_t sci)
+{
+	struct macsec_rx_sc *rx_sc;
+	struct macsec_dev *macsec;
+	struct net_device *real_dev = macsec_priv(dev)->real_dev;
+	struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
+	struct macsec_secy *secy;
+
+	list_for_each_entry(macsec, &rxd->secys, secys) {
+		if (find_rx_sc_rtnl(&macsec->secy, sci))
+			return ERR_PTR(-EEXIST);
+	}
+
+	rx_sc = kzalloc(sizeof(*rx_sc), GFP_KERNEL);
+	if (!rx_sc)
+		return ERR_PTR(-ENOMEM);
+
+	rx_sc->stats = netdev_alloc_pcpu_stats(struct pcpu_rx_sc_stats);
+	if (!rx_sc->stats) {
+		kfree(rx_sc);
+		return ERR_PTR(-ENOMEM);
+	}
+
+	rx_sc->sci = sci;
+	rx_sc->active = true;
+	atomic_set(&rx_sc->refcnt, 1);
+
+	secy = &macsec_priv(dev)->secy;
+	rcu_assign_pointer(rx_sc->next, secy->rx_sc);
+	rcu_assign_pointer(secy->rx_sc, rx_sc);
+
+	if (rx_sc->active)
+		secy->n_rx_sc++;
+
+	return rx_sc;
+}
+
+static int init_tx_sa(struct macsec_tx_sa *tx_sa, char *sak, int key_len,
+		      int icv_len)
+{
+	tx_sa->stats = alloc_percpu(struct macsec_tx_sa_stats);
+	if (!tx_sa->stats)
+		return -1;
+
+	tx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len);
+	if (!tx_sa->key.tfm) {
+		free_percpu(tx_sa->stats);
+		return -1;
+	}
+
+	tx_sa->active = false;
+	atomic_set(&tx_sa->refcnt, 1);
+	spin_lock_init(&tx_sa->lock);
+
+	return 0;
+}
+
+static void clear_tx_sa(struct macsec_tx_sa *tx_sa)
+{
+	tx_sa->active = false;
+
+	macsec_txsa_put(tx_sa);
+}
+
+static struct genl_family macsec_fam = {
+	.id		= GENL_ID_GENERATE,
+	.name		= MACSEC_GENL_NAME,
+	.hdrsize	= 0,
+	.version	= MACSEC_GENL_VERSION,
+	.maxattr	= MACSEC_ATTR_MAX,
+	.netnsok	= true,
+};
+
+static struct net_device *get_dev_from_nl(struct net *net,
+					  struct nlattr **attrs)
+{
+	int ifindex = nla_get_u32(attrs[MACSEC_ATTR_IFINDEX]);
+	struct net_device *dev;
+
+	dev = __dev_get_by_index(net, ifindex);
+	if (!dev)
+		return ERR_PTR(-ENODEV);
+
+	if (!netif_is_macsec(dev))
+		return ERR_PTR(-ENODEV);
+
+	return dev;
+}
+
+static sci_t nla_get_sci(const struct nlattr *nla)
+{
+	return (__force sci_t)nla_get_u64(nla);
+}
+
+static int nla_put_sci(struct sk_buff *skb, int attrtype, sci_t value)
+{
+	return nla_put_u64(skb, attrtype, (__force u64)value);
+}
+
+static struct macsec_tx_sa *get_txsa_from_nl(struct net *net,
+					     struct nlattr **attrs,
+					     struct nlattr **tb_sa,
+					     struct net_device **devp,
+					     struct macsec_secy **secyp,
+					     struct macsec_tx_sc **scp,
+					     u8 *assoc_num)
+{
+	struct net_device *dev;
+	struct macsec_secy *secy;
+	struct macsec_tx_sc *tx_sc;
+	struct macsec_tx_sa *tx_sa;
+
+	if (!tb_sa[MACSEC_SA_ATTR_AN])
+		return ERR_PTR(-EINVAL);
+
+	*assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
+
+	dev = get_dev_from_nl(net, attrs);
+	if (IS_ERR(dev))
+		return ERR_CAST(dev);
+
+	if (*assoc_num >= MACSEC_NUM_AN)
+		return ERR_PTR(-EINVAL);
+
+	secy = &macsec_priv(dev)->secy;
+	tx_sc = &secy->tx_sc;
+
+	tx_sa = rtnl_dereference(tx_sc->sa[*assoc_num]);
+	if (!tx_sa)
+		return ERR_PTR(-ENODEV);
+
+	*devp = dev;
+	*scp = tx_sc;
+	*secyp = secy;
+	return tx_sa;
+}
+
+static struct macsec_rx_sc *get_rxsc_from_nl(struct net *net,
+					     struct nlattr **attrs,
+					     struct nlattr **tb_rxsc,
+					     struct net_device **devp,
+					     struct macsec_secy **secyp)
+{
+	struct net_device *dev;
+	struct macsec_secy *secy;
+	struct macsec_rx_sc *rx_sc;
+	sci_t sci;
+
+	dev = get_dev_from_nl(net, attrs);
+	if (IS_ERR(dev))
+		return ERR_CAST(dev);
+
+	secy = &macsec_priv(dev)->secy;
+
+	if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI])
+		return ERR_PTR(-EINVAL);
+
+	sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
+	rx_sc = find_rx_sc_rtnl(secy, sci);
+	if (!rx_sc)
+		return ERR_PTR(-ENODEV);
+
+	*secyp = secy;
+	*devp = dev;
+
+	return rx_sc;
+}
+
+static struct macsec_rx_sa *get_rxsa_from_nl(struct net *net,
+					     struct nlattr **attrs,
+					     struct nlattr **tb_rxsc,
+					     struct nlattr **tb_sa,
+					     struct net_device **devp,
+					     struct macsec_secy **secyp,
+					     struct macsec_rx_sc **scp,
+					     u8 *assoc_num)
+{
+	struct macsec_rx_sc *rx_sc;
+	struct macsec_rx_sa *rx_sa;
+
+	if (!tb_sa[MACSEC_SA_ATTR_AN])
+		return ERR_PTR(-EINVAL);
+
+	*assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
+	if (*assoc_num >= MACSEC_NUM_AN)
+		return ERR_PTR(-EINVAL);
+
+	rx_sc = get_rxsc_from_nl(net, attrs, tb_rxsc, devp, secyp);
+	if (IS_ERR(rx_sc))
+		return ERR_CAST(rx_sc);
+
+	rx_sa = rtnl_dereference(rx_sc->sa[*assoc_num]);
+	if (!rx_sa)
+		return ERR_PTR(-ENODEV);
+
+	*scp = rx_sc;
+	return rx_sa;
+}
+
+
+static const struct nla_policy macsec_genl_policy[NUM_MACSEC_ATTR] = {
+	[MACSEC_ATTR_IFINDEX] = { .type = NLA_U32 },
+	[MACSEC_ATTR_RXSC_CONFIG] = { .type = NLA_NESTED },
+	[MACSEC_ATTR_SA_CONFIG] = { .type = NLA_NESTED },
+};
+
+static const struct nla_policy macsec_genl_rxsc_policy[NUM_MACSEC_RXSC_ATTR] = {
+	[MACSEC_RXSC_ATTR_SCI] = { .type = NLA_U64 },
+	[MACSEC_RXSC_ATTR_ACTIVE] = { .type = NLA_U8 },
+};
+
+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_KEYID] = { .type = NLA_U64 },
+	[MACSEC_SA_ATTR_KEY] = { .type = NLA_BINARY,
+				 .len = MACSEC_MAX_KEY_LEN, },
+};
+
+static int parse_sa_config(struct nlattr **attrs, struct nlattr **tb_sa)
+{
+	if (!attrs[MACSEC_ATTR_SA_CONFIG])
+		return -EINVAL;
+
+	if (nla_parse_nested(tb_sa, MACSEC_SA_ATTR_MAX, attrs[MACSEC_ATTR_SA_CONFIG],
+			     macsec_genl_sa_policy))
+		return -EINVAL;
+
+	return 0;
+}
+
+static int parse_rxsc_config(struct nlattr **attrs, struct nlattr **tb_rxsc)
+{
+	if (!attrs[MACSEC_ATTR_RXSC_CONFIG])
+		return -EINVAL;
+
+	if (nla_parse_nested(tb_rxsc, MACSEC_RXSC_ATTR_MAX, attrs[MACSEC_ATTR_RXSC_CONFIG],
+			     macsec_genl_rxsc_policy))
+		return -EINVAL;
+
+	return 0;
+}
+
+static bool validate_add_rxsa(struct nlattr **attrs)
+{
+	if (!attrs[MACSEC_SA_ATTR_AN] ||
+	    !attrs[MACSEC_SA_ATTR_KEY] ||
+	    !attrs[MACSEC_SA_ATTR_KEYID])
+		return false;
+
+	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)
+		return false;
+
+	if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
+		if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
+			return false;
+	}
+
+	return true;
+}
+
+static int macsec_add_rxsa(struct sk_buff *skb, struct genl_info *info)
+{
+	struct net_device *dev;
+	struct nlattr **attrs = info->attrs;
+	struct macsec_secy *secy;
+	struct macsec_rx_sc *rx_sc;
+	struct macsec_rx_sa *rx_sa;
+	unsigned char assoc_num;
+	struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
+	struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
+
+	if (!attrs[MACSEC_ATTR_IFINDEX])
+		return -EINVAL;
+
+	if (parse_sa_config(attrs, tb_sa))
+		return -EINVAL;
+
+	if (parse_rxsc_config(attrs, tb_rxsc))
+		return -EINVAL;
+
+	if (!validate_add_rxsa(tb_sa))
+		return -EINVAL;
+
+	rtnl_lock();
+	rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy);
+	if (IS_ERR(rx_sc) || !macsec_rxsc_get(rx_sc)) {
+		rtnl_unlock();
+		return PTR_ERR(rx_sc);
+	}
+
+	assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
+
+	if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) {
+		pr_notice("macsec: nl: add_rxsa: bad key length: %d != %d\n",
+			  nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len);
+		rtnl_unlock();
+		return -EINVAL;
+	}
+
+	rx_sa = rtnl_dereference(rx_sc->sa[assoc_num]);
+	if (rx_sa) {
+		rtnl_unlock();
+		return -EBUSY;
+	}
+
+	rx_sa = kmalloc(sizeof(*rx_sa), GFP_KERNEL);
+	if (init_rx_sa(rx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len,
+		       secy->icv_len)) {
+		rtnl_unlock();
+		return -ENOMEM;
+	}
+
+	if (tb_sa[MACSEC_SA_ATTR_PN]) {
+		spin_lock_bh(&rx_sa->lock);
+		rx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]);
+		spin_unlock_bh(&rx_sa->lock);
+	}
+
+	if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
+		rx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
+
+	rx_sa->key.id = nla_get_u64(tb_sa[MACSEC_SA_ATTR_KEYID]);
+	rx_sa->sc = rx_sc;
+	rcu_assign_pointer(rx_sc->sa[assoc_num], rx_sa);
+
+	rtnl_unlock();
+
+	return 0;
+}
+
+static bool validate_add_rxsc(struct nlattr **attrs)
+{
+	if (!attrs[MACSEC_RXSC_ATTR_SCI])
+		return false;
+
+	if (attrs[MACSEC_RXSC_ATTR_ACTIVE]) {
+		if (nla_get_u8(attrs[MACSEC_RXSC_ATTR_ACTIVE]) > 1)
+			return false;
+	}
+
+	return true;
+}
+
+static int macsec_add_rxsc(struct sk_buff *skb, struct genl_info *info)
+{
+	struct net_device *dev;
+	sci_t sci = MACSEC_UNDEF_SCI;
+	struct nlattr **attrs = info->attrs;
+	struct macsec_rx_sc *rx_sc;
+	struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
+
+	if (!attrs[MACSEC_ATTR_IFINDEX])
+		return -EINVAL;
+
+	if (parse_rxsc_config(attrs, tb_rxsc))
+		return -EINVAL;
+
+	if (!validate_add_rxsc(tb_rxsc))
+		return -EINVAL;
+
+	rtnl_lock();
+	dev = get_dev_from_nl(genl_info_net(info), attrs);
+	if (IS_ERR(dev)) {
+		rtnl_unlock();
+		return PTR_ERR(dev);
+	}
+
+	sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
+
+	rx_sc = create_rx_sc(dev, sci);
+	if (IS_ERR(rx_sc)) {
+		rtnl_unlock();
+		return PTR_ERR(rx_sc);
+	}
+
+	if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE])
+		rx_sc->active = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]);
+
+	rtnl_unlock();
+
+	return 0;
+}
+
+static bool validate_add_txsa(struct nlattr **attrs)
+{
+	if (!attrs[MACSEC_SA_ATTR_AN] ||
+	    !attrs[MACSEC_SA_ATTR_PN] ||
+	    !attrs[MACSEC_SA_ATTR_KEY] ||
+	    !attrs[MACSEC_SA_ATTR_KEYID])
+		return false;
+
+	if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
+		return false;
+
+	if (nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0)
+		return false;
+
+	if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
+		if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
+			return false;
+	}
+
+	return true;
+}
+
+static int macsec_add_txsa(struct sk_buff *skb, struct genl_info *info)
+{
+	struct net_device *dev;
+	struct nlattr **attrs = info->attrs;
+	struct macsec_secy *secy;
+	struct macsec_tx_sc *tx_sc;
+	struct macsec_tx_sa *tx_sa;
+	unsigned char assoc_num;
+	struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
+
+	if (!attrs[MACSEC_ATTR_IFINDEX])
+		return -EINVAL;
+
+	if (parse_sa_config(attrs, tb_sa))
+		return -EINVAL;
+
+	if (!validate_add_txsa(tb_sa))
+		return -EINVAL;
+
+	rtnl_lock();
+	dev = get_dev_from_nl(genl_info_net(info), attrs);
+	if (IS_ERR(dev)) {
+		rtnl_unlock();
+		return PTR_ERR(dev);
+	}
+
+	secy = &macsec_priv(dev)->secy;
+	tx_sc = &secy->tx_sc;
+
+	assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
+
+	if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) {
+		pr_notice("macsec: nl: add_txsa: bad key length: %d != %d\n",
+			  nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len);
+		rtnl_unlock();
+		return -EINVAL;
+	}
+
+	tx_sa = rtnl_dereference(tx_sc->sa[assoc_num]);
+	if (tx_sa) {
+		rtnl_unlock();
+		return -EBUSY;
+	}
+
+	tx_sa = kmalloc(sizeof(*tx_sa), GFP_KERNEL);
+	if (!tx_sa || init_tx_sa(tx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
+				 secy->key_len, secy->icv_len)) {
+		rtnl_unlock();
+		return -ENOMEM;
+	}
+
+	tx_sa->key.id = nla_get_u64(tb_sa[MACSEC_SA_ATTR_KEYID]);
+
+	spin_lock_bh(&tx_sa->lock);
+	tx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]);
+	spin_unlock_bh(&tx_sa->lock);
+
+	if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
+		tx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
+
+	if (assoc_num == tx_sc->encoding_sa && tx_sa->active)
+		secy->operational = true;
+
+	rcu_assign_pointer(tx_sc->sa[assoc_num], tx_sa);
+
+	rtnl_unlock();
+
+	return 0;
+}
+
+static int macsec_del_rxsa(struct sk_buff *skb, struct genl_info *info)
+{
+	struct nlattr **attrs = info->attrs;
+	struct net_device *dev;
+	struct macsec_secy *secy;
+	struct macsec_rx_sc *rx_sc;
+	struct macsec_rx_sa *rx_sa;
+	u8 assoc_num;
+	struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
+	struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
+
+	if (!attrs[MACSEC_ATTR_IFINDEX])
+		return -EINVAL;
+
+	if (parse_sa_config(attrs, tb_sa))
+		return -EINVAL;
+
+	if (parse_rxsc_config(attrs, tb_rxsc))
+		return -EINVAL;
+
+	rtnl_lock();
+	rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa,
+				 &dev, &secy, &rx_sc, &assoc_num);
+	if (IS_ERR(rx_sa)) {
+		rtnl_unlock();
+		return PTR_ERR(rx_sa);
+	}
+
+	if (rx_sa->active) {
+		rtnl_unlock();
+		return -EBUSY;
+	}
+
+	RCU_INIT_POINTER(rx_sc->sa[assoc_num], NULL);
+	clear_rx_sa(rx_sa);
+
+	rtnl_unlock();
+
+	return 0;
+}
+
+static int macsec_del_rxsc(struct sk_buff *skb, struct genl_info *info)
+{
+	struct nlattr **attrs = info->attrs;
+	struct net_device *dev;
+	struct macsec_secy *secy;
+	struct macsec_rx_sc *rx_sc;
+	sci_t sci;
+	struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
+
+	if (!attrs[MACSEC_ATTR_IFINDEX])
+		return -EINVAL;
+
+	if (parse_rxsc_config(attrs, tb_rxsc))
+		return -EINVAL;
+
+	if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI])
+		return -EINVAL;
+
+	rtnl_lock();
+	dev = get_dev_from_nl(genl_info_net(info), info->attrs);
+	if (IS_ERR(dev)) {
+		rtnl_unlock();
+		return PTR_ERR(dev);
+	}
+
+	secy = &macsec_priv(dev)->secy;
+	sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
+
+	rx_sc = del_rx_sc(secy, sci);
+	if (!rx_sc) {
+		rtnl_unlock();
+		return -ENODEV;
+	}
+
+	free_rx_sc(rx_sc);
+	rtnl_unlock();
+
+	return 0;
+}
+
+static int macsec_del_txsa(struct sk_buff *skb, struct genl_info *info)
+{
+	struct nlattr **attrs = info->attrs;
+	struct net_device *dev;
+	struct macsec_secy *secy;
+	struct macsec_tx_sc *tx_sc;
+	struct macsec_tx_sa *tx_sa;
+	u8 assoc_num;
+	struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
+
+	if (!attrs[MACSEC_ATTR_IFINDEX])
+		return -EINVAL;
+
+	if (parse_sa_config(attrs, tb_sa))
+		return -EINVAL;
+
+	rtnl_lock();
+	tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa,
+				 &dev, &secy, &tx_sc, &assoc_num);
+	if (IS_ERR(tx_sa)) {
+		rtnl_unlock();
+		return PTR_ERR(tx_sa);
+	}
+
+	if (tx_sa->active) {
+		rtnl_unlock();
+		return -EBUSY;
+	}
+
+	RCU_INIT_POINTER(tx_sc->sa[assoc_num], NULL);
+	clear_tx_sa(tx_sa);
+
+	rtnl_unlock();
+
+	return 0;
+}
+
+static bool validate_upd_sa(struct nlattr **attrs)
+{
+	if (!attrs[MACSEC_SA_ATTR_AN] ||
+	    attrs[MACSEC_SA_ATTR_KEY] ||
+	    attrs[MACSEC_SA_ATTR_KEYID])
+		return false;
+
+	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)
+		return false;
+
+	if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
+		if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
+			return false;
+	}
+
+	return true;
+}
+
+static int macsec_upd_txsa(struct sk_buff *skb, struct genl_info *info)
+{
+	struct nlattr **attrs = info->attrs;
+	struct net_device *dev;
+	struct macsec_secy *secy;
+	struct macsec_tx_sc *tx_sc;
+	struct macsec_tx_sa *tx_sa;
+	u8 assoc_num;
+	struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
+
+	if (!attrs[MACSEC_ATTR_IFINDEX])
+		return -EINVAL;
+
+	if (parse_sa_config(attrs, tb_sa))
+		return -EINVAL;
+
+	if (!validate_upd_sa(tb_sa))
+		return -EINVAL;
+
+	rtnl_lock();
+	tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa,
+				 &dev, &secy, &tx_sc, &assoc_num);
+	if (IS_ERR(tx_sa)) {
+		rtnl_unlock();
+		return PTR_ERR(tx_sa);
+	}
+
+	if (tb_sa[MACSEC_SA_ATTR_PN]) {
+		spin_lock_bh(&tx_sa->lock);
+		tx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]);
+		spin_unlock_bh(&tx_sa->lock);
+	}
+
+	if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
+		tx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
+
+	if (assoc_num == tx_sc->encoding_sa)
+		secy->operational = tx_sa->active;
+
+	rtnl_unlock();
+
+	return 0;
+}
+
+static int macsec_upd_rxsa(struct sk_buff *skb, struct genl_info *info)
+{
+	struct nlattr **attrs = info->attrs;
+	struct net_device *dev;
+	struct macsec_secy *secy;
+	struct macsec_rx_sc *rx_sc;
+	struct macsec_rx_sa *rx_sa;
+	u8 assoc_num;
+	struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
+	struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
+
+	if (!attrs[MACSEC_ATTR_IFINDEX])
+		return -EINVAL;
+
+	if (parse_rxsc_config(attrs, tb_rxsc))
+		return -EINVAL;
+
+	if (parse_sa_config(attrs, tb_sa))
+		return -EINVAL;
+
+	if (!validate_upd_sa(tb_sa))
+		return -EINVAL;
+
+	rtnl_lock();
+	rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa,
+				 &dev, &secy, &rx_sc, &assoc_num);
+	if (IS_ERR(rx_sa)) {
+		rtnl_unlock();
+		return PTR_ERR(rx_sa);
+	}
+
+	if (tb_sa[MACSEC_SA_ATTR_PN]) {
+		spin_lock_bh(&rx_sa->lock);
+		rx_sa->next_pn = nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]);
+		spin_unlock_bh(&rx_sa->lock);
+	}
+
+	if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
+		rx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
+
+	rtnl_unlock();
+	return 0;
+}
+
+static int macsec_upd_rxsc(struct sk_buff *skb, struct genl_info *info)
+{
+	struct nlattr **attrs = info->attrs;
+	struct net_device *dev;
+	struct macsec_secy *secy;
+	struct macsec_rx_sc *rx_sc;
+	struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
+
+	if (!attrs[MACSEC_ATTR_IFINDEX])
+		return -EINVAL;
+
+	if (parse_rxsc_config(attrs, tb_rxsc))
+		return -EINVAL;
+
+	if (!validate_add_rxsc(tb_rxsc))
+		return -EINVAL;
+
+	rtnl_lock();
+	rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy);
+	if (IS_ERR(rx_sc)) {
+		rtnl_unlock();
+		return PTR_ERR(rx_sc);
+	}
+
+	if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]) {
+		bool new = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]);
+
+		if (rx_sc->active != new)
+			secy->n_rx_sc += new ? 1 : -1;
+
+		rx_sc->active = new;
+	}
+
+	rtnl_unlock();
+
+	return 0;
+}
+
+static int copy_tx_sa_stats(struct sk_buff *skb,
+			     struct macsec_tx_sa_stats __percpu *pstats)
+{
+	struct macsec_tx_sa_stats sum = {0, };
+	int cpu;
+
+	for_each_possible_cpu(cpu) {
+		const struct macsec_tx_sa_stats *stats = per_cpu_ptr(pstats, cpu);
+
+		sum.OutPktsProtected += stats->OutPktsProtected;
+		sum.OutPktsEncrypted += stats->OutPktsEncrypted;
+	}
+
+	if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_PROTECTED, sum.OutPktsProtected) ||
+	    nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_ENCRYPTED, sum.OutPktsEncrypted))
+		return -EMSGSIZE;
+
+	return 0;
+}
+
+static int copy_rx_sa_stats(struct sk_buff *skb,
+			     struct macsec_rx_sa_stats __percpu *pstats)
+{
+	struct macsec_rx_sa_stats sum = {0, };
+	int cpu;
+
+	for_each_possible_cpu(cpu) {
+		const struct macsec_rx_sa_stats *stats = per_cpu_ptr(pstats, cpu);
+
+		sum.InPktsOK         += stats->InPktsOK;
+		sum.InPktsInvalid    += stats->InPktsInvalid;
+		sum.InPktsNotValid   += stats->InPktsNotValid;
+		sum.InPktsNotUsingSA += stats->InPktsNotUsingSA;
+		sum.InPktsUnusedSA   += stats->InPktsUnusedSA;
+	}
+
+	if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_OK, sum.InPktsOK) ||
+	    nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_INVALID, sum.InPktsInvalid) ||
+	    nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_VALID, sum.InPktsNotValid) ||
+	    nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_USING_SA, sum.InPktsNotUsingSA) ||
+	    nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_UNUSED_SA, sum.InPktsUnusedSA))
+		return -EMSGSIZE;
+
+	return 0;
+}
+
+static int copy_rx_sc_stats(struct sk_buff *skb,
+			     struct pcpu_rx_sc_stats __percpu *pstats)
+{
+	struct macsec_rx_sc_stats sum = {0, };
+	int cpu;
+
+	for_each_possible_cpu(cpu) {
+		const struct pcpu_rx_sc_stats *stats;
+		struct macsec_rx_sc_stats tmp;
+		unsigned int start;
+
+		stats = per_cpu_ptr(pstats, cpu);
+		do {
+			start = u64_stats_fetch_begin_irq(&stats->syncp);
+			memcpy(&tmp, &stats->stats, sizeof(tmp));
+		} while (u64_stats_fetch_retry_irq(&stats->syncp, start));
+
+		sum.InOctetsValidated += tmp.InOctetsValidated;
+		sum.InOctetsDecrypted += tmp.InOctetsDecrypted;
+		sum.InPktsUnchecked   += tmp.InPktsUnchecked;
+		sum.InPktsDelayed     += tmp.InPktsDelayed;
+		sum.InPktsOK          += tmp.InPktsOK;
+		sum.InPktsInvalid     += tmp.InPktsInvalid;
+		sum.InPktsLate        += tmp.InPktsLate;
+		sum.InPktsNotValid    += tmp.InPktsNotValid;
+		sum.InPktsNotUsingSA  += tmp.InPktsNotUsingSA;
+		sum.InPktsUnusedSA    += tmp.InPktsUnusedSA;
+	}
+
+	if (nla_put_u64(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_VALIDATED, sum.InOctetsValidated) ||
+	    nla_put_u64(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_DECRYPTED, sum.InOctetsDecrypted) ||
+	    nla_put_u64(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNCHECKED, sum.InPktsUnchecked) ||
+	    nla_put_u64(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_DELAYED, sum.InPktsDelayed) ||
+	    nla_put_u64(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_OK, sum.InPktsOK) ||
+	    nla_put_u64(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_INVALID, sum.InPktsInvalid) ||
+	    nla_put_u64(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_LATE, sum.InPktsLate) ||
+	    nla_put_u64(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_VALID, sum.InPktsNotValid) ||
+	    nla_put_u64(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_USING_SA, sum.InPktsNotUsingSA) ||
+	    nla_put_u64(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNUSED_SA, sum.InPktsUnusedSA))
+		return -EMSGSIZE;
+
+	return 0;
+}
+
+static int copy_tx_sc_stats(struct sk_buff *skb,
+			     struct pcpu_tx_sc_stats __percpu *pstats)
+{
+	struct macsec_tx_sc_stats sum = {0, };
+	int cpu;
+
+	for_each_possible_cpu(cpu) {
+		const struct pcpu_tx_sc_stats *stats;
+		struct macsec_tx_sc_stats tmp;
+		unsigned int start;
+
+		stats = per_cpu_ptr(pstats, cpu);
+		do {
+			start = u64_stats_fetch_begin_irq(&stats->syncp);
+			memcpy(&tmp, &stats->stats, sizeof(tmp));
+		} while (u64_stats_fetch_retry_irq(&stats->syncp, start));
+
+		sum.OutPktsProtected   += tmp.OutPktsProtected;
+		sum.OutPktsEncrypted   += tmp.OutPktsEncrypted;
+		sum.OutOctetsProtected += tmp.OutOctetsProtected;
+		sum.OutOctetsEncrypted += tmp.OutOctetsEncrypted;
+	}
+
+	if (nla_put_u64(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_PROTECTED, sum.OutPktsProtected) ||
+	    nla_put_u64(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_ENCRYPTED, sum.OutPktsEncrypted) ||
+	    nla_put_u64(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_PROTECTED, sum.OutOctetsProtected) ||
+	    nla_put_u64(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_ENCRYPTED, sum.OutOctetsEncrypted))
+		return -EMSGSIZE;
+
+	return 0;
+}
+
+static int copy_secy_stats(struct sk_buff *skb,
+			    struct pcpu_secy_stats __percpu *pstats)
+{
+	struct macsec_dev_stats sum = {0, };
+	int cpu;
+
+	for_each_possible_cpu(cpu) {
+		const struct pcpu_secy_stats *stats;
+		struct macsec_dev_stats tmp;
+		unsigned int start;
+
+		stats = per_cpu_ptr(pstats, cpu);
+		do {
+			start = u64_stats_fetch_begin_irq(&stats->syncp);
+			memcpy(&tmp, &stats->stats, sizeof(tmp));
+		} while (u64_stats_fetch_retry_irq(&stats->syncp, start));
+
+		sum.OutPktsUntagged  += tmp.OutPktsUntagged;
+		sum.InPktsUntagged   += tmp.InPktsUntagged;
+		sum.OutPktsTooLong   += tmp.OutPktsTooLong;
+		sum.InPktsNoTag      += tmp.InPktsNoTag;
+		sum.InPktsBadTag     += tmp.InPktsBadTag;
+		sum.InPktsUnknownSCI += tmp.InPktsUnknownSCI;
+		sum.InPktsNoSCI      += tmp.InPktsNoSCI;
+		sum.InPktsOverrun    += tmp.InPktsOverrun;
+	}
+
+	if (nla_put_u64(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_UNTAGGED, sum.OutPktsUntagged) ||
+	    nla_put_u64(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNTAGGED, sum.InPktsUntagged) ||
+	    nla_put_u64(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_TOO_LONG, sum.OutPktsTooLong) ||
+	    nla_put_u64(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_TAG, sum.InPktsNoTag) ||
+	    nla_put_u64(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_BAD_TAG, sum.InPktsBadTag) ||
+	    nla_put_u64(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNKNOWN_SCI, sum.InPktsUnknownSCI) ||
+	    nla_put_u64(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_SCI, sum.InPktsNoSCI) ||
+	    nla_put_u64(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_OVERRUN, sum.InPktsOverrun))
+		return -EMSGSIZE;
+
+	return 0;
+}
+
+static int nla_put_secy(struct macsec_secy *secy, struct sk_buff *skb)
+{
+	struct macsec_tx_sc *tx_sc = &secy->tx_sc;
+	struct nlattr *secy_nest = nla_nest_start(skb, MACSEC_ATTR_SECY);
+
+	if (!secy_nest)
+		return 1;
+
+	if (nla_put_sci(skb, MACSEC_SECY_ATTR_SCI, secy->sci) ||
+	    nla_put_u64(skb, MACSEC_SECY_ATTR_CIPHER_SUITE, DEFAULT_CIPHER_ID) ||
+	    nla_put_u8(skb, MACSEC_SECY_ATTR_ICV_LEN, secy->icv_len) ||
+	    nla_put_u8(skb, MACSEC_SECY_ATTR_OPER, secy->operational) ||
+	    nla_put_u8(skb, MACSEC_SECY_ATTR_PROTECT, secy->protect_frames) ||
+	    nla_put_u8(skb, MACSEC_SECY_ATTR_REPLAY, secy->replay_protect) ||
+	    nla_put_u8(skb, MACSEC_SECY_ATTR_VALIDATE, secy->validate_frames) ||
+	    nla_put_u8(skb, MACSEC_SECY_ATTR_ENCRYPT, tx_sc->encrypt) ||
+	    nla_put_u8(skb, MACSEC_SECY_ATTR_INC_SCI, tx_sc->send_sci) ||
+	    nla_put_u8(skb, MACSEC_SECY_ATTR_ES, tx_sc->end_station) ||
+	    nla_put_u8(skb, MACSEC_SECY_ATTR_SCB, tx_sc->scb) ||
+	    nla_put_u8(skb, MACSEC_SECY_ATTR_ENCODING_SA, tx_sc->encoding_sa))
+		goto cancel;
+
+	if (secy->replay_protect) {
+		if (nla_put_u32(skb, MACSEC_SECY_ATTR_WINDOW, secy->replay_window))
+			goto cancel;
+	}
+
+	nla_nest_end(skb, secy_nest);
+	return 0;
+
+cancel:
+	nla_nest_cancel(skb, secy_nest);
+	return 1;
+}
+
+static int dump_secy(struct macsec_secy *secy, struct net_device *dev,
+		     struct sk_buff *skb, struct netlink_callback *cb)
+{
+	struct macsec_rx_sc *rx_sc;
+	struct macsec_tx_sc *tx_sc = &secy->tx_sc;
+	struct nlattr *txsa_list, *rxsc_list;
+	int i, j;
+	void *hdr;
+	struct nlattr *attr;
+
+	hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
+			  &macsec_fam, NLM_F_MULTI, MACSEC_CMD_GET_TXSC);
+	if (!hdr)
+		return -EMSGSIZE;
+
+	rtnl_lock();
+
+	if (nla_put_u32(skb, MACSEC_ATTR_IFINDEX, dev->ifindex))
+		goto nla_put_failure;
+
+	if (nla_put_secy(secy, skb))
+		goto nla_put_failure;
+
+	attr = nla_nest_start(skb, MACSEC_ATTR_TXSC_STATS);
+	if (!attr)
+		goto nla_put_failure;
+	if (copy_tx_sc_stats(skb, tx_sc->stats)) {
+		nla_nest_cancel(skb, attr);
+		goto nla_put_failure;
+	}
+	nla_nest_end(skb, attr);
+
+	attr = nla_nest_start(skb, MACSEC_ATTR_SECY_STATS);
+	if (!attr)
+		goto nla_put_failure;
+	if (copy_secy_stats(skb, macsec_priv(dev)->stats)) {
+		nla_nest_cancel(skb, attr);
+		goto nla_put_failure;
+	}
+	nla_nest_end(skb, attr);
+
+	txsa_list = nla_nest_start(skb, MACSEC_ATTR_TXSA_LIST);
+	if (!txsa_list)
+		goto nla_put_failure;
+	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;
+
+		if (!tx_sa)
+			continue;
+
+		txsa_nest = nla_nest_start(skb, j++);
+		if (!txsa_nest) {
+			nla_nest_cancel(skb, txsa_list);
+			goto nla_put_failure;
+		}
+
+		if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) ||
+		    nla_put_u32(skb, MACSEC_SA_ATTR_PN, tx_sa->next_pn) ||
+		    nla_put_u64(skb, MACSEC_SA_ATTR_KEYID, tx_sa->key.id) ||
+		    nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, tx_sa->active)) {
+			nla_nest_cancel(skb, txsa_nest);
+			nla_nest_cancel(skb, txsa_list);
+			goto nla_put_failure;
+		}
+
+		attr = nla_nest_start(skb, MACSEC_SA_ATTR_STATS);
+		if (!attr) {
+			nla_nest_cancel(skb, txsa_nest);
+			nla_nest_cancel(skb, txsa_list);
+			goto nla_put_failure;
+		}
+		if (copy_tx_sa_stats(skb, tx_sa->stats)) {
+			nla_nest_cancel(skb, attr);
+			nla_nest_cancel(skb, txsa_nest);
+			nla_nest_cancel(skb, txsa_list);
+			goto nla_put_failure;
+		}
+		nla_nest_end(skb, attr);
+
+		nla_nest_end(skb, txsa_nest);
+	}
+	nla_nest_end(skb, txsa_list);
+
+	rxsc_list = nla_nest_start(skb, MACSEC_ATTR_RXSC_LIST);
+	if (!rxsc_list)
+		goto nla_put_failure;
+
+	j = 1;
+	for_each_rxsc_rtnl(secy, rx_sc) {
+		int k;
+		struct nlattr *rxsa_list;
+		struct nlattr *rxsc_nest = nla_nest_start(skb, j++);
+
+		if (!rxsc_nest) {
+			nla_nest_cancel(skb, rxsc_list);
+			goto nla_put_failure;
+		}
+
+		if (nla_put_u8(skb, MACSEC_RXSC_ATTR_ACTIVE, rx_sc->active) ||
+		    nla_put_sci(skb, MACSEC_RXSC_ATTR_SCI, rx_sc->sci)) {
+			nla_nest_cancel(skb, rxsc_nest);
+			nla_nest_cancel(skb, rxsc_list);
+			goto nla_put_failure;
+		}
+
+		attr = nla_nest_start(skb, MACSEC_RXSC_ATTR_STATS);
+		if (!attr) {
+			nla_nest_cancel(skb, rxsc_nest);
+			nla_nest_cancel(skb, rxsc_list);
+			goto nla_put_failure;
+		}
+		if (copy_rx_sc_stats(skb, rx_sc->stats)) {
+			nla_nest_cancel(skb, attr);
+			nla_nest_cancel(skb, rxsc_nest);
+			nla_nest_cancel(skb, rxsc_list);
+			goto nla_put_failure;
+		}
+		nla_nest_end(skb, attr);
+
+		rxsa_list = nla_nest_start(skb, MACSEC_RXSC_ATTR_SA_LIST);
+		if (!rxsa_list) {
+			nla_nest_cancel(skb, rxsc_nest);
+			nla_nest_cancel(skb, rxsc_list);
+			goto nla_put_failure;
+		}
+
+		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;
+
+			if (!rx_sa)
+				continue;
+
+			rxsa_nest = nla_nest_start(skb, k++);
+			if (!rxsa_nest) {
+				nla_nest_cancel(skb, rxsa_list);
+				nla_nest_cancel(skb, rxsc_nest);
+				nla_nest_cancel(skb, rxsc_list);
+				goto nla_put_failure;
+			}
+
+			attr = nla_nest_start(skb, MACSEC_SA_ATTR_STATS);
+			if (!attr) {
+				nla_nest_cancel(skb, rxsa_list);
+				nla_nest_cancel(skb, rxsc_nest);
+				nla_nest_cancel(skb, rxsc_list);
+				goto nla_put_failure;
+			}
+			if (copy_rx_sa_stats(skb, rx_sa->stats)) {
+				nla_nest_cancel(skb, attr);
+				nla_nest_cancel(skb, rxsa_list);
+				nla_nest_cancel(skb, rxsc_nest);
+				nla_nest_cancel(skb, rxsc_list);
+				goto nla_put_failure;
+			}
+			nla_nest_end(skb, attr);
+
+			if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) ||
+			    nla_put_u32(skb, MACSEC_SA_ATTR_PN, rx_sa->next_pn) ||
+			    nla_put_u64(skb, MACSEC_SA_ATTR_KEYID, rx_sa->key.id) ||
+			    nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, rx_sa->active)) {
+				nla_nest_cancel(skb, rxsa_nest);
+				nla_nest_cancel(skb, rxsc_nest);
+				nla_nest_cancel(skb, rxsc_list);
+				goto nla_put_failure;
+			}
+			nla_nest_end(skb, rxsa_nest);
+		}
+
+		nla_nest_end(skb, rxsa_list);
+		nla_nest_end(skb, rxsc_nest);
+	}
+
+	nla_nest_end(skb, rxsc_list);
+
+	rtnl_unlock();
+
+	genlmsg_end(skb, hdr);
+
+	return 0;
+
+nla_put_failure:
+	rtnl_unlock();
+	genlmsg_cancel(skb, hdr);
+	return -EMSGSIZE;
+}
+
+static int macsec_dump_txsc(struct sk_buff *skb, struct netlink_callback *cb)
+{
+	struct net *net = sock_net(skb->sk);
+	struct net_device *dev;
+	int dev_idx, d;
+
+	dev_idx = cb->args[0];
+
+	d = 0;
+	for_each_netdev(net, dev) {
+		struct macsec_secy *secy;
+
+		if (d < dev_idx)
+			goto next;
+
+		if (!netif_is_macsec(dev))
+			goto next;
+
+		secy = &macsec_priv(dev)->secy;
+		if (dump_secy(secy, dev, skb, cb) < 0)
+			goto done;
+next:
+		d++;
+	}
+
+done:
+	cb->args[0] = d;
+	return skb->len;
+}
+
+static const struct genl_ops macsec_genl_ops[] = {
+	{
+		.cmd = MACSEC_CMD_GET_TXSC,
+		.dumpit = macsec_dump_txsc,
+		.policy = macsec_genl_policy,
+	},
+	{
+		.cmd = MACSEC_CMD_ADD_RXSC,
+		.doit = macsec_add_rxsc,
+		.policy = macsec_genl_policy,
+		.flags = GENL_ADMIN_PERM,
+	},
+	{
+		.cmd = MACSEC_CMD_DEL_RXSC,
+		.doit = macsec_del_rxsc,
+		.policy = macsec_genl_policy,
+		.flags = GENL_ADMIN_PERM,
+	},
+	{
+		.cmd = MACSEC_CMD_UPD_RXSC,
+		.doit = macsec_upd_rxsc,
+		.policy = macsec_genl_policy,
+		.flags = GENL_ADMIN_PERM,
+	},
+	{
+		.cmd = MACSEC_CMD_ADD_TXSA,
+		.doit = macsec_add_txsa,
+		.policy = macsec_genl_policy,
+		.flags = GENL_ADMIN_PERM,
+	},
+	{
+		.cmd = MACSEC_CMD_DEL_TXSA,
+		.doit = macsec_del_txsa,
+		.policy = macsec_genl_policy,
+		.flags = GENL_ADMIN_PERM,
+	},
+	{
+		.cmd = MACSEC_CMD_UPD_TXSA,
+		.doit = macsec_upd_txsa,
+		.policy = macsec_genl_policy,
+		.flags = GENL_ADMIN_PERM,
+	},
+	{
+		.cmd = MACSEC_CMD_ADD_RXSA,
+		.doit = macsec_add_rxsa,
+		.policy = macsec_genl_policy,
+		.flags = GENL_ADMIN_PERM,
+	},
+	{
+		.cmd = MACSEC_CMD_DEL_RXSA,
+		.doit = macsec_del_rxsa,
+		.policy = macsec_genl_policy,
+		.flags = GENL_ADMIN_PERM,
+	},
+	{
+		.cmd = MACSEC_CMD_UPD_RXSA,
+		.doit = macsec_upd_rxsa,
+		.policy = macsec_genl_policy,
+		.flags = GENL_ADMIN_PERM,
+	},
+};
+
+static netdev_tx_t macsec_start_xmit(struct sk_buff *skb,
+				     struct net_device *dev)
+{
+	struct macsec_dev *macsec = netdev_priv(dev);
+	struct macsec_secy *secy = &macsec->secy;
+	struct pcpu_secy_stats *secy_stats;
+	int ret, len;
+
+	/* 10.5 */
+	if (!secy->protect_frames) {
+		secy_stats = this_cpu_ptr(macsec->stats);
+		u64_stats_update_begin(&secy_stats->syncp);
+		secy_stats->stats.OutPktsUntagged++;
+		u64_stats_update_end(&secy_stats->syncp);
+		len = skb->len;
+		ret = dev_queue_xmit(skb);
+		count_tx(dev, ret, len);
+		return ret;
+	}
+
+	if (!secy->operational) {
+		kfree_skb(skb);
+		dev->stats.tx_dropped++;
+		return NETDEV_TX_OK;
+	}
+
+	skb = macsec_encrypt(skb, dev);
+	if (IS_ERR(skb)) {
+		if (PTR_ERR(skb) != -EINPROGRESS)
+			dev->stats.tx_dropped++;
+		return NETDEV_TX_OK;
+	}
+
+	macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa);
+
+	macsec_encrypt_finish(skb, dev);
+	len = skb->len;
+	ret = dev_queue_xmit(skb);
+	count_tx(dev, ret, len);
+	return ret;
+}
+
+#define MACSEC_FEATURES \
+	(NETIF_F_SG | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST)
+static int macsec_dev_init(struct net_device *dev)
+{
+	struct macsec_dev *macsec = macsec_priv(dev);
+	struct net_device *real_dev = macsec->real_dev;
+
+	dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
+	if (!dev->tstats)
+		return -ENOMEM;
+
+	dev->features = real_dev->features & MACSEC_FEATURES;
+	dev->features |= NETIF_F_LLTX | NETIF_F_GSO_SOFTWARE;
+
+	dev->needed_headroom = real_dev->needed_headroom +
+			       MACSEC_NEEDED_HEADROOM;
+	dev->needed_tailroom = real_dev->needed_tailroom +
+			       MACSEC_NEEDED_TAILROOM;
+
+	if (is_zero_ether_addr(dev->dev_addr))
+		eth_hw_addr_inherit(dev, real_dev);
+	if (is_zero_ether_addr(dev->broadcast))
+		memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len);
+
+	return 0;
+}
+
+static void macsec_dev_uninit(struct net_device *dev)
+{
+	free_percpu(dev->tstats);
+}
+
+static netdev_features_t macsec_fix_features(struct net_device *dev,
+					     netdev_features_t features)
+{
+	struct macsec_dev *macsec = macsec_priv(dev);
+	struct net_device *real_dev = macsec->real_dev;
+
+	features &= real_dev->features & MACSEC_FEATURES;
+	features |= NETIF_F_LLTX | NETIF_F_GSO_SOFTWARE;
+
+	return features;
+}
+
+static int macsec_dev_open(struct net_device *dev)
+{
+	struct macsec_dev *macsec = macsec_priv(dev);
+	struct net_device *real_dev = macsec->real_dev;
+	int err;
+
+	if (!(real_dev->flags & IFF_UP))
+		return -ENETDOWN;
+
+	err = dev_uc_add(real_dev, dev->dev_addr);
+	if (err < 0)
+		return err;
+
+	if (dev->flags & IFF_ALLMULTI) {
+		err = dev_set_allmulti(real_dev, 1);
+		if (err < 0)
+			goto del_unicast;
+	}
+
+	if (dev->flags & IFF_PROMISC) {
+		err = dev_set_promiscuity(real_dev, 1);
+		if (err < 0)
+			goto clear_allmulti;
+	}
+
+	if (netif_carrier_ok(real_dev))
+		netif_carrier_on(dev);
+
+	return 0;
+clear_allmulti:
+	if (dev->flags & IFF_ALLMULTI)
+		dev_set_allmulti(real_dev, -1);
+del_unicast:
+	dev_uc_del(real_dev, dev->dev_addr);
+	netif_carrier_off(dev);
+	return err;
+}
+
+static int macsec_dev_stop(struct net_device *dev)
+{
+	struct macsec_dev *macsec = macsec_priv(dev);
+	struct net_device *real_dev = macsec->real_dev;
+
+	netif_carrier_off(dev);
+
+	dev_mc_unsync(real_dev, dev);
+	dev_uc_unsync(real_dev, dev);
+
+	if (dev->flags & IFF_ALLMULTI)
+		dev_set_allmulti(real_dev, -1);
+
+	if (dev->flags & IFF_PROMISC)
+		dev_set_promiscuity(real_dev, -1);
+
+	dev_uc_del(real_dev, dev->dev_addr);
+
+	return 0;
+}
+
+static void macsec_dev_change_rx_flags(struct net_device *dev, int change)
+{
+	struct net_device *real_dev = macsec_priv(dev)->real_dev;
+
+	if (!(dev->flags & IFF_UP))
+		return;
+
+	if (change & IFF_ALLMULTI)
+		dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1);
+
+	if (change & IFF_PROMISC)
+		dev_set_promiscuity(real_dev,
+				    dev->flags & IFF_PROMISC ? 1 : -1);
+}
+
+static void macsec_dev_set_rx_mode(struct net_device *dev)
+{
+	struct net_device *real_dev = macsec_priv(dev)->real_dev;
+
+	dev_mc_sync(real_dev, dev);
+	dev_uc_sync(real_dev, dev);
+}
+
+static int macsec_set_mac_address(struct net_device *dev, void *p)
+{
+	struct macsec_dev *macsec = macsec_priv(dev);
+	struct net_device *real_dev = macsec->real_dev;
+	struct sockaddr *addr = p;
+	int err;
+
+	if (!is_valid_ether_addr(addr->sa_data))
+		return -EADDRNOTAVAIL;
+
+	if (!(dev->flags & IFF_UP))
+		goto out;
+
+	err = dev_uc_add(real_dev, addr->sa_data);
+	if (err < 0)
+		return err;
+
+	dev_uc_del(real_dev, dev->dev_addr);
+
+out:
+	ether_addr_copy(dev->dev_addr, addr->sa_data);
+	return 0;
+}
+
+static int macsec_change_mtu(struct net_device *dev, int new_mtu)
+{
+	struct macsec_dev *macsec = macsec_priv(dev);
+	unsigned int extra = macsec->secy.icv_len + macsec_extra_len(true);
+
+	if (macsec->real_dev->mtu - extra < new_mtu)
+		return -ERANGE;
+
+	dev->mtu = new_mtu;
+
+	return 0;
+}
+
+static struct rtnl_link_stats64 *macsec_get_stats64(struct net_device *dev,
+						    struct rtnl_link_stats64 *s)
+{
+	int cpu;
+
+	if (!dev->tstats)
+		return s;
+
+	for_each_possible_cpu(cpu) {
+		struct pcpu_sw_netstats *stats;
+		struct pcpu_sw_netstats tmp;
+		int start;
+
+		stats = per_cpu_ptr(dev->tstats, cpu);
+		do {
+			start = u64_stats_fetch_begin_irq(&stats->syncp);
+			tmp.rx_packets = stats->rx_packets;
+			tmp.rx_bytes   = stats->rx_bytes;
+			tmp.tx_packets = stats->tx_packets;
+			tmp.tx_bytes   = stats->tx_bytes;
+		} while (u64_stats_fetch_retry_irq(&stats->syncp, start));
+
+		s->rx_packets += tmp.rx_packets;
+		s->rx_bytes   += tmp.rx_bytes;
+		s->tx_packets += tmp.tx_packets;
+		s->tx_bytes   += tmp.tx_bytes;
+	}
+
+	s->rx_dropped = dev->stats.rx_dropped;
+	s->tx_dropped = dev->stats.tx_dropped;
+
+	return s;
+}
+
+static int macsec_get_iflink(const struct net_device *dev)
+{
+	return macsec_priv(dev)->real_dev->ifindex;
+}
+
+static const struct net_device_ops macsec_netdev_ops = {
+	.ndo_init		= macsec_dev_init,
+	.ndo_uninit		= macsec_dev_uninit,
+	.ndo_open		= macsec_dev_open,
+	.ndo_stop		= macsec_dev_stop,
+	.ndo_fix_features	= macsec_fix_features,
+	.ndo_change_mtu		= macsec_change_mtu,
+	.ndo_set_rx_mode	= macsec_dev_set_rx_mode,
+	.ndo_change_rx_flags	= macsec_dev_change_rx_flags,
+	.ndo_set_mac_address	= macsec_set_mac_address,
+	.ndo_start_xmit		= macsec_start_xmit,
+	.ndo_get_stats64	= macsec_get_stats64,
+	.ndo_get_iflink		= macsec_get_iflink,
+};
+
+static const struct device_type macsec_type = {
+	.name = "macsec",
+};
+
+static const struct nla_policy macsec_rtnl_policy[IFLA_MACSEC_MAX + 1] = {
+	[IFLA_MACSEC_SCI] = { .type = NLA_U64 },
+	[IFLA_MACSEC_ICV_LEN] = { .type = NLA_U8 },
+	[IFLA_MACSEC_CIPHER_SUITE] = { .type = NLA_U64 },
+	[IFLA_MACSEC_WINDOW] = { .type = NLA_U32 },
+	[IFLA_MACSEC_ENCODING_SA] = { .type = NLA_U8 },
+	[IFLA_MACSEC_ENCRYPT] = { .type = NLA_U8 },
+	[IFLA_MACSEC_PROTECT] = { .type = NLA_U8 },
+	[IFLA_MACSEC_INC_SCI] = { .type = NLA_U8 },
+	[IFLA_MACSEC_ES] = { .type = NLA_U8 },
+	[IFLA_MACSEC_SCB] = { .type = NLA_U8 },
+	[IFLA_MACSEC_REPLAY_PROTECT] = { .type = NLA_U8 },
+	[IFLA_MACSEC_VALIDATION] = { .type = NLA_U8 },
+};
+
+static void macsec_free_netdev(struct net_device *dev)
+{
+	struct macsec_dev *macsec = macsec_priv(dev);
+	struct net_device *real_dev = macsec->real_dev;
+
+	free_percpu(macsec->stats);
+	free_percpu(macsec->secy.tx_sc.stats);
+
+	dev_put(real_dev);
+	free_netdev(dev);
+}
+
+static void macsec_setup(struct net_device *dev)
+{
+	ether_setup(dev);
+	dev->tx_queue_len = 0;
+	dev->netdev_ops = &macsec_netdev_ops;
+	dev->destructor = macsec_free_netdev;
+
+	eth_zero_addr(dev->broadcast);
+}
+
+static void macsec_changelink_common(struct net_device *dev,
+				     struct nlattr *data[])
+{
+	struct macsec_secy *secy;
+	struct macsec_tx_sc *tx_sc;
+
+	secy = &macsec_priv(dev)->secy;
+	tx_sc = &secy->tx_sc;
+
+	if (data[IFLA_MACSEC_ENCODING_SA]) {
+		struct macsec_tx_sa *tx_sa;
+
+		tx_sc->encoding_sa = nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]);
+		tx_sa = rtnl_dereference(tx_sc->sa[tx_sc->encoding_sa]);
+
+		secy->operational = tx_sa && tx_sa->active;
+	}
+
+	if (data[IFLA_MACSEC_WINDOW])
+		secy->replay_window = nla_get_u32(data[IFLA_MACSEC_WINDOW]);
+
+	if (data[IFLA_MACSEC_ENCRYPT])
+		tx_sc->encrypt = !!nla_get_u8(data[IFLA_MACSEC_ENCRYPT]);
+
+	if (data[IFLA_MACSEC_PROTECT])
+		secy->protect_frames = !!nla_get_u8(data[IFLA_MACSEC_PROTECT]);
+
+	if (data[IFLA_MACSEC_INC_SCI])
+		tx_sc->send_sci = !!nla_get_u8(data[IFLA_MACSEC_INC_SCI]);
+
+	if (data[IFLA_MACSEC_ES])
+		tx_sc->end_station = !!nla_get_u8(data[IFLA_MACSEC_ES]);
+
+	if (data[IFLA_MACSEC_SCB])
+		tx_sc->scb = !!nla_get_u8(data[IFLA_MACSEC_SCB]);
+
+	if (data[IFLA_MACSEC_REPLAY_PROTECT])
+		secy->replay_protect = !!nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT]);
+
+	if (data[IFLA_MACSEC_VALIDATION])
+		secy->validate_frames = nla_get_u8(data[IFLA_MACSEC_VALIDATION]);
+}
+
+static int macsec_changelink(struct net_device *dev, struct nlattr *tb[],
+			     struct nlattr *data[])
+{
+	if (!data)
+		return 0;
+
+	if (data[IFLA_MACSEC_CIPHER_SUITE] ||
+	    data[IFLA_MACSEC_ICV_LEN] ||
+	    data[IFLA_MACSEC_SCI] ||
+	    data[IFLA_MACSEC_PORT])
+		return -EINVAL;
+
+	macsec_changelink_common(dev, data);
+
+	return 0;
+}
+
+static void macsec_del_dev(struct macsec_dev *macsec)
+{
+	int i;
+
+	while (macsec->secy.rx_sc) {
+		struct macsec_rx_sc *rx_sc = rtnl_dereference(macsec->secy.rx_sc);
+
+		rcu_assign_pointer(macsec->secy.rx_sc, rx_sc->next);
+		free_rx_sc(rx_sc);
+	}
+
+	for (i = 0; i < MACSEC_NUM_AN; i++) {
+		struct macsec_tx_sa *sa = rtnl_dereference(macsec->secy.tx_sc.sa[i]);
+
+		if (sa) {
+			RCU_INIT_POINTER(macsec->secy.tx_sc.sa[i], NULL);
+			clear_tx_sa(sa);
+		}
+	}
+}
+
+static void macsec_dellink(struct net_device *dev, struct list_head *head)
+{
+	struct macsec_dev *macsec = macsec_priv(dev);
+	struct net_device *real_dev = macsec->real_dev;
+	struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
+
+	unregister_netdevice_queue(dev, head);
+	list_del_rcu(&macsec->secys);
+	if (list_empty(&rxd->secys))
+		netdev_rx_handler_unregister(real_dev);
+
+	macsec_del_dev(macsec);
+}
+
+static int register_macsec_dev(struct net_device *real_dev,
+			       struct net_device *dev)
+{
+	struct macsec_dev *macsec = macsec_priv(dev);
+	struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
+
+	if (!rxd) {
+		int err;
+
+		rxd = kmalloc(sizeof(*rxd), GFP_KERNEL);
+		if (!rxd)
+			return -ENOMEM;
+
+		INIT_LIST_HEAD(&rxd->secys);
+
+		err = netdev_rx_handler_register(real_dev, macsec_handle_frame,
+						 rxd);
+		if (err < 0)
+			return err;
+	}
+
+	list_add_tail_rcu(&macsec->secys, &rxd->secys);
+	return 0;
+}
+
+static bool sci_exists(struct net_device *dev, sci_t sci)
+{
+	struct macsec_rxh_data *rxd = macsec_data_rtnl(dev);
+	struct macsec_dev *macsec;
+
+	list_for_each_entry(macsec, &rxd->secys, secys) {
+		if (macsec->secy.sci == sci)
+			return true;
+	}
+
+	return false;
+}
+
+static sci_t dev_to_sci(struct net_device *dev, __be16 port)
+{
+	return make_sci(dev->dev_addr, port);
+}
+
+static int macsec_add_dev(struct net_device *dev, sci_t sci, u8 icv_len)
+{
+	struct macsec_dev *macsec = macsec_priv(dev);
+	struct macsec_secy *secy = &macsec->secy;
+
+	macsec->stats = netdev_alloc_pcpu_stats(struct pcpu_secy_stats);
+	if (!macsec->stats)
+		return -ENOMEM;
+
+	secy->tx_sc.stats = netdev_alloc_pcpu_stats(struct pcpu_tx_sc_stats);
+	if (!secy->tx_sc.stats) {
+		free_percpu(macsec->stats);
+		return -ENOMEM;
+	}
+
+	if (sci == MACSEC_UNDEF_SCI)
+		sci = dev_to_sci(dev, MACSEC_PORT_ES);
+
+	secy->netdev = dev;
+	secy->operational = true;
+	secy->key_len = DEFAULT_SAK_LEN;
+	secy->icv_len = icv_len;
+	secy->validate_frames = MACSEC_VALIDATE_DEFAULT;
+	secy->protect_frames = true;
+	secy->replay_protect = false;
+
+	secy->sci = sci;
+	secy->tx_sc.active = true;
+	secy->tx_sc.encoding_sa = DEFAULT_ENCODING_SA;
+	secy->tx_sc.encrypt = DEFAULT_ENCRYPT;
+	secy->tx_sc.send_sci = DEFAULT_SEND_SCI;
+	secy->tx_sc.end_station = false;
+	secy->tx_sc.scb = false;
+
+	return 0;
+}
+
+static int macsec_newlink(struct net *net, struct net_device *dev,
+			  struct nlattr *tb[], struct nlattr *data[])
+{
+	struct macsec_dev *macsec = macsec_priv(dev);
+	struct net_device *real_dev;
+	int err;
+	sci_t sci;
+	u8 icv_len = DEFAULT_ICV_LEN;
+	rx_handler_func_t *rx_handler;
+
+	if (!tb[IFLA_LINK])
+		return -EINVAL;
+	real_dev = __dev_get_by_index(net, nla_get_u32(tb[IFLA_LINK]));
+	if (!real_dev)
+		return -ENODEV;
+
+	dev->priv_flags |= IFF_MACSEC;
+
+	macsec->real_dev = real_dev;
+
+	if (data && data[IFLA_MACSEC_ICV_LEN])
+		icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]);
+	dev->mtu = real_dev->mtu - icv_len - macsec_extra_len(true);
+
+	rx_handler = rtnl_dereference(real_dev->rx_handler);
+	if (rx_handler && rx_handler != macsec_handle_frame)
+		return -EBUSY;
+
+	err = register_netdevice(dev);
+	if (err < 0)
+		return err;
+
+	/* need to be already registered so that ->init has run and
+	 * the MAC addr is set
+	 */
+	if (data && data[IFLA_MACSEC_SCI])
+		sci = nla_get_sci(data[IFLA_MACSEC_SCI]);
+	else if (data && data[IFLA_MACSEC_PORT])
+		sci = dev_to_sci(dev, nla_get_be16(data[IFLA_MACSEC_PORT]));
+	else
+		sci = dev_to_sci(dev, MACSEC_PORT_ES);
+
+	if (rx_handler && sci_exists(real_dev, sci)) {
+		err = -EBUSY;
+		goto unregister;
+	}
+
+	err = macsec_add_dev(dev, sci, icv_len);
+	if (err)
+		goto unregister;
+
+	if (data)
+		macsec_changelink_common(dev, data);
+
+	err = register_macsec_dev(real_dev, dev);
+	if (err < 0)
+		goto del_dev;
+
+	dev_hold(real_dev);
+
+	return 0;
+
+del_dev:
+	macsec_del_dev(macsec);
+unregister:
+	unregister_netdevice(dev);
+	return err;
+}
+
+static int macsec_validate_attr(struct nlattr *tb[], struct nlattr *data[])
+{
+	u64 csid = DEFAULT_CIPHER_ID;
+	u8 icv_len = DEFAULT_ICV_LEN;
+	int flag;
+	bool es, scb, sci;
+
+	if (!data)
+		return 0;
+
+	if (data[IFLA_MACSEC_CIPHER_SUITE])
+		csid = nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE]);
+
+	if (data[IFLA_MACSEC_ICV_LEN])
+		icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]);
+
+	switch (csid) {
+	case DEFAULT_CIPHER_ID:
+	case DEFAULT_CIPHER_ALT:
+		if (icv_len < MACSEC_MIN_ICV_LEN ||
+		    icv_len > MACSEC_MAX_ICV_LEN)
+			return -EINVAL;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	if (data[IFLA_MACSEC_ENCODING_SA]) {
+		if (nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]) >= MACSEC_NUM_AN)
+			return -EINVAL;
+	}
+
+	for (flag = IFLA_MACSEC_ENCODING_SA + 1;
+	     flag < IFLA_MACSEC_VALIDATION;
+	     flag++) {
+		if (data[flag]) {
+			if (nla_get_u8(data[flag]) > 1)
+				return -EINVAL;
+		}
+	}
+
+	es  = data[IFLA_MACSEC_ES] ? nla_get_u8(data[IFLA_MACSEC_ES]) : false;
+	sci = data[IFLA_MACSEC_INC_SCI] ? nla_get_u8(data[IFLA_MACSEC_INC_SCI]) : false;
+	scb = data[IFLA_MACSEC_SCB] ? nla_get_u8(data[IFLA_MACSEC_SCB]) : false;
+
+	if ((sci && (scb || es)) || (scb && es))
+		return -EINVAL;
+
+	if (data[IFLA_MACSEC_VALIDATION] &&
+	    nla_get_u8(data[IFLA_MACSEC_VALIDATION]) > MACSEC_VALIDATE_MAX)
+		return -EINVAL;
+
+	if ((data[IFLA_MACSEC_PROTECT] &&
+	     nla_get_u8(data[IFLA_MACSEC_PROTECT])) &&
+	    !data[IFLA_MACSEC_WINDOW])
+		return -EINVAL;
+
+	return 0;
+}
+
+static struct net *macsec_get_link_net(const struct net_device *dev)
+{
+	return dev_net(macsec_priv(dev)->real_dev);
+}
+
+static size_t macsec_get_size(const struct net_device *dev)
+{
+	return 0 +
+		nla_total_size(8) + /* SCI */
+		nla_total_size(1) + /* ICV_LEN */
+		nla_total_size(8) + /* CIPHER_SUITE */
+		nla_total_size(4) + /* WINDOW */
+		nla_total_size(1) + /* ENCODING_SA */
+		nla_total_size(1) + /* ENCRYPT */
+		nla_total_size(1) + /* PROTECT */
+		nla_total_size(1) + /* INC_SCI */
+		nla_total_size(1) + /* ES */
+		nla_total_size(1) + /* SCB */
+		nla_total_size(1) + /* REPLAY_PROTECT */
+		nla_total_size(1) + /* VALIDATION */
+		0;
+}
+
+static int macsec_fill_info(struct sk_buff *skb,
+			    const struct net_device *dev)
+{
+	struct macsec_secy *secy = &macsec_priv(dev)->secy;
+	struct macsec_tx_sc *tx_sc = &secy->tx_sc;
+
+	if (nla_put_sci(skb, IFLA_MACSEC_SCI, secy->sci) ||
+	    nla_put_u8(skb, IFLA_MACSEC_ICV_LEN, secy->icv_len) ||
+	    nla_put_u64(skb, IFLA_MACSEC_CIPHER_SUITE, DEFAULT_CIPHER_ID) ||
+	    nla_put_u8(skb, IFLA_MACSEC_ENCODING_SA, tx_sc->encoding_sa) ||
+	    nla_put_u8(skb, IFLA_MACSEC_ENCRYPT, tx_sc->encrypt) ||
+	    nla_put_u8(skb, IFLA_MACSEC_PROTECT, secy->protect_frames) ||
+	    nla_put_u8(skb, IFLA_MACSEC_INC_SCI, tx_sc->send_sci) ||
+	    nla_put_u8(skb, IFLA_MACSEC_ES, tx_sc->end_station) ||
+	    nla_put_u8(skb, IFLA_MACSEC_SCB, tx_sc->scb) ||
+	    nla_put_u8(skb, IFLA_MACSEC_REPLAY_PROTECT, secy->replay_protect) ||
+	    nla_put_u8(skb, IFLA_MACSEC_VALIDATION, secy->validate_frames) ||
+	    0)
+		goto nla_put_failure;
+
+	if (secy->replay_protect) {
+		if (nla_put_u32(skb, IFLA_MACSEC_WINDOW, secy->replay_window))
+			goto nla_put_failure;
+	}
+
+	return 0;
+
+nla_put_failure:
+	return -EMSGSIZE;
+}
+
+static struct rtnl_link_ops macsec_link_ops __read_mostly = {
+	.kind		= "macsec",
+	.priv_size	= sizeof(struct macsec_dev),
+	.maxtype	= IFLA_MACSEC_MAX,
+	.policy		= macsec_rtnl_policy,
+	.setup		= macsec_setup,
+	.validate	= macsec_validate_attr,
+	.newlink	= macsec_newlink,
+	.changelink	= macsec_changelink,
+	.dellink	= macsec_dellink,
+	.get_size	= macsec_get_size,
+	.fill_info	= macsec_fill_info,
+	.get_link_net	= macsec_get_link_net,
+};
+
+static bool is_macsec_master(struct net_device *dev)
+{
+	return rcu_access_pointer(dev->rx_handler) == macsec_handle_frame;
+}
+
+static int macsec_notify(struct notifier_block *this, unsigned long event,
+			 void *ptr)
+{
+	struct net_device *real_dev = netdev_notifier_info_to_dev(ptr);
+	LIST_HEAD(head);
+
+	if (!is_macsec_master(real_dev))
+		return NOTIFY_DONE;
+
+	switch (event) {
+	case NETDEV_UNREGISTER: {
+		struct macsec_dev *m, *n;
+		struct macsec_rxh_data *rxd;
+
+		rxd = macsec_data_rtnl(real_dev);
+		list_for_each_entry_safe(m, n, &rxd->secys, secys) {
+			macsec_dellink(m->secy.netdev, &head);
+		}
+		unregister_netdevice_many(&head);
+		break;
+	}
+	case NETDEV_CHANGEMTU: {
+		struct macsec_dev *m;
+		struct macsec_rxh_data *rxd;
+
+		rxd = macsec_data_rtnl(real_dev);
+		list_for_each_entry(m, &rxd->secys, secys) {
+			struct net_device *dev = m->secy.netdev;
+			unsigned int mtu = real_dev->mtu - (m->secy.icv_len +
+							    macsec_extra_len(true));
+
+			if (dev->mtu > mtu)
+				dev_set_mtu(dev, mtu);
+		}
+	}
+	}
+
+	return NOTIFY_OK;
+}
+
+static struct notifier_block macsec_notifier = {
+	.notifier_call = macsec_notify,
+};
+
+static int __init macsec_init(void)
+{
+	int err;
+
+	pr_info("MACsec IEEE 802.1AE\n");
+	err = register_netdevice_notifier(&macsec_notifier);
+	if (err)
+		return err;
+
+	err = rtnl_link_register(&macsec_link_ops);
+	if (err)
+		goto notifier;
+
+	err = genl_register_family_with_ops(&macsec_fam, macsec_genl_ops);
+	if (err)
+		goto rtnl;
+
+	return 0;
+
+rtnl:
+	rtnl_link_unregister(&macsec_link_ops);
+notifier:
+	unregister_netdevice_notifier(&macsec_notifier);
+	return err;
+}
+
+static void __exit macsec_exit(void)
+{
+	genl_unregister_family(&macsec_fam);
+	rtnl_link_unregister(&macsec_link_ops);
+	unregister_netdevice_notifier(&macsec_notifier);
+}
+
+module_init(macsec_init);
+module_exit(macsec_exit);
+
+MODULE_ALIAS_RTNL_LINK("macsec");
+
+MODULE_DESCRIPTION("MACsec IEEE 802.1AE");
+MODULE_LICENSE("GPL v2");