Adding upstream version 6.1.76.upstream/6.1.76upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 4413 insertions, 0 deletions

diff --git a/drivers/net/macsec.c b/drivers/net/macsec.c
new file mode 100644
index 000000000..209ee9f35
--- /dev/null
+++ b/drivers/net/macsec.c
@@ -0,0 +1,4413 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * drivers/net/macsec.c - MACsec device
+ *
+ * Copyright (c) 2015 Sabrina Dubroca <sd@queasysnail.net>
+ */
+
+#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/netdevice.h>
+#include <linux/rtnetlink.h>
+#include <linux/refcount.h>
+#include <net/genetlink.h>
+#include <net/sock.h>
+#include <net/gro_cells.h>
+#include <net/macsec.h>
+#include <net/dst_metadata.h>
+#include <linux/phy.h>
+#include <linux/byteorder/generic.h>
+#include <linux/if_arp.h>
+
+#include <uapi/linux/if_macsec.h>
+
+/* 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;
+
+/* 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 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))
+
+#define pn_same_half(pn1, pn2) (!(((pn1) >> 31) ^ ((pn2) >> 31)))
+
+struct gcm_iv_xpn {
+	union {
+		u8 short_secure_channel_id[4];
+		ssci_t ssci;
+	};
+	__be64 pn;
+} __packed;
+
+struct gcm_iv {
+	union {
+		u8 secure_channel_id[8];
+		sci_t sci;
+	};
+	__be32 pn;
+};
+
+#define MACSEC_VALIDATE_DEFAULT MACSEC_VALIDATE_STRICT
+
+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
+ * @dev_tracker: refcount tracker for @real_dev reference
+ * @stats: MACsec device stats
+ * @secys: linked list of SecY's on the underlying device
+ * @gro_cells: pointer to the Generic Receive Offload cell
+ * @offload: status of offloading on the MACsec device
+ */
+struct macsec_dev {
+	struct macsec_secy secy;
+	struct net_device *real_dev;
+	netdevice_tracker dev_tracker;
+	struct pcpu_secy_stats __percpu *stats;
+	struct list_head secys;
+	struct gro_cells gro_cells;
+	enum macsec_offload offload;
+};
+
+/**
+ * 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 (!refcount_inc_not_zero(&sa->refcnt))
+		return NULL;
+
+	return sa;
+}
+
+static struct macsec_rx_sa *macsec_active_rxsa_get(struct macsec_rx_sc *rx_sc)
+{
+	struct macsec_rx_sa *sa = NULL;
+	int an;
+
+	for (an = 0; an < MACSEC_NUM_AN; an++)	{
+		sa = macsec_rxsa_get(rx_sc->sa[an]);
+		if (sa)
+			break;
+	}
+	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 refcount_inc_not_zero(&sc->refcnt) ? sc : NULL;
+}
+
+static void macsec_rxsc_put(struct macsec_rx_sc *sc)
+{
+	if (refcount_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);
+	kfree(sa);
+}
+
+static void macsec_rxsa_put(struct macsec_rx_sa *sa)
+{
+	if (refcount_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 (!refcount_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 (refcount_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_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
+#define MACSEC_XPN_MAX_REPLAY_WINDOW (((1 << 30) - 1))
+
+static sci_t make_sci(const 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,
+			       bool sci_present)
+{
+	const struct macsec_tx_sc *tx_sc = &secy->tx_sc;
+
+	memset(&h->tci_an, 0, macsec_sectag_len(sci_present));
+	h->eth.h_proto = htons(ETH_P_MACSEC);
+
+	if (sci_present) {
+		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 != MACSEC_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;
+}
+
+/* Checks if a MACsec interface is being offloaded to an hardware engine */
+static bool macsec_is_offloaded(struct macsec_dev *macsec)
+{
+	if (macsec->offload == MACSEC_OFFLOAD_MAC ||
+	    macsec->offload == MACSEC_OFFLOAD_PHY)
+		return true;
+
+	return false;
+}
+
+/* Checks if underlying layers implement MACsec offloading functions. */
+static bool macsec_check_offload(enum macsec_offload offload,
+				 struct macsec_dev *macsec)
+{
+	if (!macsec || !macsec->real_dev)
+		return false;
+
+	if (offload == MACSEC_OFFLOAD_PHY)
+		return macsec->real_dev->phydev &&
+		       macsec->real_dev->phydev->macsec_ops;
+	else if (offload == MACSEC_OFFLOAD_MAC)
+		return macsec->real_dev->features & NETIF_F_HW_MACSEC &&
+		       macsec->real_dev->macsec_ops;
+
+	return false;
+}
+
+static const struct macsec_ops *__macsec_get_ops(enum macsec_offload offload,
+						 struct macsec_dev *macsec,
+						 struct macsec_context *ctx)
+{
+	if (ctx) {
+		memset(ctx, 0, sizeof(*ctx));
+		ctx->offload = offload;
+
+		if (offload == MACSEC_OFFLOAD_PHY)
+			ctx->phydev = macsec->real_dev->phydev;
+		else if (offload == MACSEC_OFFLOAD_MAC)
+			ctx->netdev = macsec->real_dev;
+	}
+
+	if (offload == MACSEC_OFFLOAD_PHY)
+		return macsec->real_dev->phydev->macsec_ops;
+	else
+		return macsec->real_dev->macsec_ops;
+}
+
+/* Returns a pointer to the MACsec ops struct if any and updates the MACsec
+ * context device reference if provided.
+ */
+static const struct macsec_ops *macsec_get_ops(struct macsec_dev *macsec,
+					       struct macsec_context *ctx)
+{
+	if (!macsec_check_offload(macsec->offload, macsec))
+		return NULL;
+
+	return __macsec_get_ops(macsec->offload, macsec, ctx);
+}
+
+/* validate MACsec packet according to IEEE 802.1AE-2018 9.12 */
+static bool macsec_validate_skb(struct sk_buff *skb, u16 icv_len, bool xpn)
+{
+	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 if not XPN (figure 10-5 with 802.11AEbw-2013 amendment) */
+	if (!h->packet_number && !xpn)
+		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_STD_ICV_LEN
+
+static void macsec_fill_iv_xpn(unsigned char *iv, ssci_t ssci, u64 pn,
+			       salt_t salt)
+{
+	struct gcm_iv_xpn *gcm_iv = (struct gcm_iv_xpn *)iv;
+
+	gcm_iv->ssci = ssci ^ salt.ssci;
+	gcm_iv->pn = cpu_to_be64(pn) ^ salt.pn;
+}
+
+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 void __macsec_pn_wrapped(struct macsec_secy *secy,
+				struct macsec_tx_sa *tx_sa)
+{
+	pr_debug("PN wrapped, transitioning to !oper\n");
+	tx_sa->active = false;
+	if (secy->protect_frames)
+		secy->operational = false;
+}
+
+void macsec_pn_wrapped(struct macsec_secy *secy, struct macsec_tx_sa *tx_sa)
+{
+	spin_lock_bh(&tx_sa->lock);
+	__macsec_pn_wrapped(secy, tx_sa);
+	spin_unlock_bh(&tx_sa->lock);
+}
+EXPORT_SYMBOL_GPL(macsec_pn_wrapped);
+
+static pn_t tx_sa_update_pn(struct macsec_tx_sa *tx_sa,
+			    struct macsec_secy *secy)
+{
+	pn_t pn;
+
+	spin_lock_bh(&tx_sa->lock);
+
+	pn = tx_sa->next_pn_halves;
+	if (secy->xpn)
+		tx_sa->next_pn++;
+	else
+		tx_sa->next_pn_halves.lower++;
+
+	if (tx_sa->next_pn == 0)
+		__macsec_pn_wrapped(secy, tx_sa);
+	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 unsigned int macsec_msdu_len(struct sk_buff *skb)
+{
+	struct macsec_dev *macsec = macsec_priv(skb->dev);
+	struct macsec_secy *secy = &macsec->secy;
+	bool sci_present = macsec_skb_cb(skb)->has_sci;
+
+	return skb->len - macsec_hdr_len(sci_present) - secy->icv_len;
+}
+
+static void macsec_count_tx(struct sk_buff *skb, struct macsec_tx_sc *tx_sc,
+			    struct macsec_tx_sa *tx_sa)
+{
+	unsigned int msdu_len = macsec_msdu_len(skb);
+	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 += msdu_len;
+		txsc_stats->stats.OutPktsEncrypted++;
+		this_cpu_inc(tx_sa->stats->OutPktsEncrypted);
+	} else {
+		txsc_stats->stats.OutOctetsProtected += msdu_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);
+		u64_stats_inc(&stats->tx_packets);
+		u64_stats_add(&stats->tx_bytes, len);
+		u64_stats_update_end(&stats->syncp);
+	}
+}
+
+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_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa);
+	/* packet is encrypted/protected so tx_bytes must be calculated */
+	len = macsec_msdu_len(skb) + 2 * ETH_ALEN;
+	macsec_encrypt_finish(skb, dev);
+	ret = dev_queue_xmit(skb);
+	count_tx(dev, ret, len);
+	rcu_read_unlock_bh();
+
+	macsec_txsa_put(sa);
+	dev_put(dev);
+}
+
+static struct aead_request *macsec_alloc_req(struct crypto_aead *tfm,
+					     unsigned char **iv,
+					     struct scatterlist **sg,
+					     int num_frags)
+{
+	size_t size, iv_offset, sg_offset;
+	struct aead_request *req;
+	void *tmp;
+
+	size = sizeof(struct aead_request) + crypto_aead_reqsize(tfm);
+	iv_offset = size;
+	size += GCM_AES_IV_LEN;
+
+	size = ALIGN(size, __alignof__(struct scatterlist));
+	sg_offset = size;
+	size += sizeof(struct scatterlist) * num_frags;
+
+	tmp = kmalloc(size, GFP_ATOMIC);
+	if (!tmp)
+		return NULL;
+
+	*iv = (unsigned char *)(tmp + iv_offset);
+	*sg = (struct scatterlist *)(tmp + sg_offset);
+	req = tmp;
+
+	aead_request_set_tfm(req, tfm);
+
+	return req;
+}
+
+static struct sk_buff *macsec_encrypt(struct sk_buff *skb,
+				      struct net_device *dev)
+{
+	int ret;
+	struct scatterlist *sg;
+	struct sk_buff *trailer;
+	unsigned char *iv;
+	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);
+	bool sci_present;
+	pn_t 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);
+	sci_present = macsec_send_sci(secy);
+	hh = skb_push(skb, macsec_extra_len(sci_present));
+	memmove(hh, eth, 2 * ETH_ALEN);
+
+	pn = tx_sa_update_pn(tx_sa, secy);
+	if (pn.full64 == 0) {
+		macsec_txsa_put(tx_sa);
+		kfree_skb(skb);
+		return ERR_PTR(-ENOLINK);
+	}
+	macsec_fill_sectag(hh, secy, pn.lower, sci_present);
+	macsec_set_shortlen(hh, unprotected_len - 2 * ETH_ALEN);
+
+	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);
+	}
+
+	ret = skb_cow_data(skb, 0, &trailer);
+	if (unlikely(ret < 0)) {
+		macsec_txsa_put(tx_sa);
+		kfree_skb(skb);
+		return ERR_PTR(ret);
+	}
+
+	req = macsec_alloc_req(tx_sa->key.tfm, &iv, &sg, ret);
+	if (!req) {
+		macsec_txsa_put(tx_sa);
+		kfree_skb(skb);
+		return ERR_PTR(-ENOMEM);
+	}
+
+	if (secy->xpn)
+		macsec_fill_iv_xpn(iv, tx_sa->ssci, pn.full64, tx_sa->key.salt);
+	else
+		macsec_fill_iv(iv, secy->sci, pn.lower);
+
+	sg_init_table(sg, ret);
+	ret = skb_to_sgvec(skb, sg, 0, skb->len);
+	if (unlikely(ret < 0)) {
+		aead_request_free(req);
+		macsec_txsa_put(tx_sa);
+		kfree_skb(skb);
+		return ERR_PTR(ret);
+	}
+
+	if (tx_sc->encrypt) {
+		int len = skb->len - macsec_hdr_len(sci_present) -
+			  secy->icv_len;
+		aead_request_set_crypt(req, sg, sg, len, iv);
+		aead_request_set_ad(req, macsec_hdr_len(sci_present));
+	} 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;
+	macsec_skb_cb(skb)->has_sci = sci_present;
+	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_halves.lower >= secy->replay_window)
+		lowest_pn = rx_sa->next_pn_halves.lower - secy->replay_window;
+
+	/* Now perform replay protection check again
+	 * (see IEEE 802.1AE-2006 figure 10-5)
+	 */
+	if (secy->replay_protect && pn < lowest_pn &&
+	    (!secy->xpn || pn_same_half(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);
+		DEV_STATS_INC(secy->netdev, rx_dropped);
+		return false;
+	}
+
+	if (secy->validate_frames != MACSEC_VALIDATE_DISABLED) {
+		unsigned int msdu_len = macsec_msdu_len(skb);
+		u64_stats_update_begin(&rxsc_stats->syncp);
+		if (hdr->tci_an & MACSEC_TCI_E)
+			rxsc_stats->stats.InOctetsDecrypted += msdu_len;
+		else
+			rxsc_stats->stats.InOctetsValidated += msdu_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);
+			this_cpu_inc(rx_sa->stats->InPktsNotValid);
+			DEV_STATS_INC(secy->netdev, rx_errors);
+			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);
+
+		// Instead of "pn >=" - to support pn overflow in xpn
+		if (pn + 1 > rx_sa->next_pn_halves.lower) {
+			rx_sa->next_pn_halves.lower = pn + 1;
+		} else if (secy->xpn &&
+			   !pn_same_half(pn, rx_sa->next_pn_halves.lower)) {
+			rx_sa->next_pn_halves.upper++;
+			rx_sa->next_pn_halves.lower = 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)
+{
+	skb->ip_summed = CHECKSUM_NONE;
+	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);
+	u64_stats_inc(&stats->rx_packets);
+	u64_stats_add(&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;
+	struct macsec_rx_sc *rx_sc = rx_sa->sc;
+	int len;
+	u32 pn;
+
+	aead_request_free(macsec_skb_cb(skb)->req);
+
+	if (!err)
+		macsec_skb_cb(skb)->valid = true;
+
+	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));
+	len = skb->len;
+	macsec_reset_skb(skb, macsec->secy.netdev);
+
+	if (gro_cells_receive(&macsec->gro_cells, skb) == NET_RX_SUCCESS)
+		count_rx(dev, len);
+
+	rcu_read_unlock_bh();
+
+out:
+	macsec_rxsa_put(rx_sa);
+	macsec_rxsc_put(rx_sc);
+	dev_put(dev);
+}
+
+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;
+	struct sk_buff *trailer;
+	unsigned char *iv;
+	struct aead_request *req;
+	struct macsec_eth_header *hdr;
+	u32 hdr_pn;
+	u16 icv_len = secy->icv_len;
+
+	macsec_skb_cb(skb)->valid = false;
+	skb = skb_share_check(skb, GFP_ATOMIC);
+	if (!skb)
+		return ERR_PTR(-ENOMEM);
+
+	ret = skb_cow_data(skb, 0, &trailer);
+	if (unlikely(ret < 0)) {
+		kfree_skb(skb);
+		return ERR_PTR(ret);
+	}
+	req = macsec_alloc_req(rx_sa->key.tfm, &iv, &sg, ret);
+	if (!req) {
+		kfree_skb(skb);
+		return ERR_PTR(-ENOMEM);
+	}
+
+	hdr = (struct macsec_eth_header *)skb->data;
+	hdr_pn = ntohl(hdr->packet_number);
+
+	if (secy->xpn) {
+		pn_t recovered_pn = rx_sa->next_pn_halves;
+
+		recovered_pn.lower = hdr_pn;
+		if (hdr_pn < rx_sa->next_pn_halves.lower &&
+		    !pn_same_half(hdr_pn, rx_sa->next_pn_halves.lower))
+			recovered_pn.upper++;
+
+		macsec_fill_iv_xpn(iv, rx_sa->ssci, recovered_pn.full64,
+				   rx_sa->key.salt);
+	} else {
+		macsec_fill_iv(iv, sci, hdr_pn);
+	}
+
+	sg_init_table(sg, ret);
+	ret = skb_to_sgvec(skb, sg, 0, skb->len);
+	if (unlikely(ret < 0)) {
+		aead_request_free(req);
+		kfree_skb(skb);
+		return ERR_PTR(ret);
+	}
+
+	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 ERR_PTR(-ENOMEM);
+		}
+	} 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;
+	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 ERR_PTR(ret);
+	} else if (ret != 0) {
+		/* decryption/authentication failed
+		 * 10.6 if validateFrames is disabled, deliver anyway
+		 */
+		if (ret != -EBADMSG) {
+			kfree_skb(skb);
+			skb = ERR_PTR(ret);
+		}
+	} 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 enum rx_handler_result handle_not_macsec(struct sk_buff *skb)
+{
+	/* Deliver to the uncontrolled port by default */
+	enum rx_handler_result ret = RX_HANDLER_PASS;
+	struct ethhdr *hdr = eth_hdr(skb);
+	struct metadata_dst *md_dst;
+	struct macsec_rxh_data *rxd;
+	struct macsec_dev *macsec;
+
+	rcu_read_lock();
+	rxd = macsec_data_rcu(skb->dev);
+	md_dst = skb_metadata_dst(skb);
+
+	list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
+		struct sk_buff *nskb;
+		struct pcpu_secy_stats *secy_stats = this_cpu_ptr(macsec->stats);
+		struct net_device *ndev = macsec->secy.netdev;
+
+		/* If h/w offloading is enabled, HW decodes frames and strips
+		 * the SecTAG, so we have to deduce which port to deliver to.
+		 */
+		if (macsec_is_offloaded(macsec) && netif_running(ndev)) {
+			if (md_dst && md_dst->type == METADATA_MACSEC &&
+			    (!find_rx_sc(&macsec->secy, md_dst->u.macsec_info.sci)))
+				continue;
+
+			if (ether_addr_equal_64bits(hdr->h_dest,
+						    ndev->dev_addr)) {
+				/* exact match, divert skb to this port */
+				skb->dev = ndev;
+				skb->pkt_type = PACKET_HOST;
+				ret = RX_HANDLER_ANOTHER;
+				goto out;
+			} else if (is_multicast_ether_addr_64bits(
+					   hdr->h_dest)) {
+				/* multicast frame, deliver on this port too */
+				nskb = skb_clone(skb, GFP_ATOMIC);
+				if (!nskb)
+					break;
+
+				nskb->dev = ndev;
+				if (ether_addr_equal_64bits(hdr->h_dest,
+							    ndev->broadcast))
+					nskb->pkt_type = PACKET_BROADCAST;
+				else
+					nskb->pkt_type = PACKET_MULTICAST;
+
+				__netif_rx(nskb);
+			}
+			continue;
+		}
+
+		/* 10.6 If the management control validateFrames is not
+		 * Strict, frames without a SecTAG are received, counted, and
+		 * delivered to the Controlled Port
+		 */
+		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);
+			DEV_STATS_INC(macsec->secy.netdev, rx_dropped);
+			continue;
+		}
+
+		/* deliver on this port */
+		nskb = skb_clone(skb, GFP_ATOMIC);
+		if (!nskb)
+			break;
+
+		nskb->dev = ndev;
+
+		if (__netif_rx(nskb) == NET_RX_SUCCESS) {
+			u64_stats_update_begin(&secy_stats->syncp);
+			secy_stats->stats.InPktsUntagged++;
+			u64_stats_update_end(&secy_stats->syncp);
+		}
+	}
+
+out:
+	rcu_read_unlock();
+	return ret;
+}
+
+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;
+	unsigned int len;
+	sci_t sci;
+	u32 hdr_pn;
+	bool cbit;
+	struct pcpu_rx_sc_stats *rxsc_stats;
+	struct pcpu_secy_stats *secy_stats;
+	bool pulled_sci;
+	int ret;
+
+	if (skb_headroom(skb) < ETH_HLEN)
+		goto drop_direct;
+
+	hdr = macsec_ethhdr(skb);
+	if (hdr->eth.h_proto != htons(ETH_P_MACSEC))
+		return handle_not_macsec(skb);
+
+	skb = skb_unshare(skb, GFP_ATOMIC);
+	*pskb = skb;
+	if (!skb)
+		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);
+
+		sc = sc ? macsec_rxsc_get(sc) : NULL;
+
+		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, secy->xpn)) {
+		u64_stats_update_begin(&secy_stats->syncp);
+		secy_stats->stats.InPktsBadTag++;
+		u64_stats_update_end(&secy_stats->syncp);
+		DEV_STATS_INC(secy->netdev, rx_errors);
+		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
+		 */
+		struct macsec_rx_sa *active_rx_sa = macsec_active_rxsa_get(rx_sc);
+		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);
+			DEV_STATS_INC(secy->netdev, rx_errors);
+			if (active_rx_sa)
+				this_cpu_inc(active_rx_sa->stats->InPktsNotUsingSA);
+			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);
+		if (active_rx_sa)
+			this_cpu_inc(active_rx_sa->stats->InPktsUnusedSA);
+		goto deliver;
+	}
+
+	/* First, PN check to avoid decrypting obviously wrong packets */
+	hdr_pn = ntohl(hdr->packet_number);
+	if (secy->replay_protect) {
+		bool late;
+
+		spin_lock(&rx_sa->lock);
+		late = rx_sa->next_pn_halves.lower >= secy->replay_window &&
+		       hdr_pn < (rx_sa->next_pn_halves.lower - secy->replay_window);
+
+		if (secy->xpn)
+			late = late && pn_same_half(rx_sa->next_pn_halves.lower, hdr_pn);
+		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);
+			DEV_STATS_INC(macsec->secy.netdev, rx_dropped);
+			goto drop;
+		}
+	}
+
+	macsec_skb_cb(skb)->rx_sa = rx_sa;
+
+	/* 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 (IS_ERR(skb)) {
+		/* the decrypt callback needs the reference */
+		if (PTR_ERR(skb) != -EINPROGRESS) {
+			macsec_rxsa_put(rx_sa);
+			macsec_rxsc_put(rx_sc);
+		}
+		rcu_read_unlock();
+		*pskb = NULL;
+		return RX_HANDLER_CONSUMED;
+	}
+
+	if (!macsec_post_decrypt(skb, secy, hdr_pn))
+		goto drop;
+
+deliver:
+	macsec_finalize_skb(skb, secy->icv_len,
+			    macsec_extra_len(macsec_skb_cb(skb)->has_sci));
+	len = skb->len;
+	macsec_reset_skb(skb, secy->netdev);
+
+	if (rx_sa)
+		macsec_rxsa_put(rx_sa);
+	macsec_rxsc_put(rx_sc);
+
+	skb_orphan(skb);
+	ret = gro_cells_receive(&macsec->gro_cells, skb);
+	if (ret == NET_RX_SUCCESS)
+		count_rx(dev, len);
+	else
+		DEV_STATS_INC(macsec->secy.netdev, rx_dropped);
+
+	rcu_read_unlock();
+
+	*pskb = NULL;
+	return RX_HANDLER_CONSUMED;
+
+drop:
+	macsec_rxsa_put(rx_sa);
+drop_nosa:
+	macsec_rxsc_put(rx_sc);
+	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, MACSEC_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;
+
+		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);
+			DEV_STATS_INC(macsec->secy.netdev, rx_errors);
+			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 {
+			DEV_STATS_INC(macsec->secy.netdev, 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, 0);
+
+	if (IS_ERR(tfm))
+		return tfm;
+
+	ret = crypto_aead_setkey(tfm, key, key_len);
+	if (ret < 0)
+		goto fail;
+
+	ret = crypto_aead_setauthsize(tfm, icv_len);
+	if (ret < 0)
+		goto fail;
+
+	return tfm;
+fail:
+	crypto_free_aead(tfm);
+	return ERR_PTR(ret);
+}
+
+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 -ENOMEM;
+
+	rx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len);
+	if (IS_ERR(rx_sa->key.tfm)) {
+		free_percpu(rx_sa->stats);
+		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);
+	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,
+					 bool active)
+{
+	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 = active;
+	refcount_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 -ENOMEM;
+
+	tx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len);
+	if (IS_ERR(tx_sa->key.tfm)) {
+		free_percpu(tx_sa->stats);
+		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);
+
+	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;
+
+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 enum macsec_offload nla_get_offload(const struct nlattr *nla)
+{
+	return (__force enum macsec_offload)nla_get_u8(nla);
+}
+
+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,
+		       int padattr)
+{
+	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,
+					     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 },
+	[MACSEC_ATTR_OFFLOAD] = { .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] = NLA_POLICY_MIN_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] = {
+	[MACSEC_OFFLOAD_ATTR_TYPE] = { .type = NLA_U8 },
+};
+
+/* Offloads an operation to a device driver */
+static int macsec_offload(int (* const func)(struct macsec_context *),
+			  struct macsec_context *ctx)
+{
+	int ret;
+
+	if (unlikely(!func))
+		return 0;
+
+	if (ctx->offload == MACSEC_OFFLOAD_PHY)
+		mutex_lock(&ctx->phydev->lock);
+
+	ret = (*func)(ctx);
+
+	if (ctx->offload == MACSEC_OFFLOAD_PHY)
+		mutex_unlock(&ctx->phydev->lock);
+
+	return ret;
+}
+
+static int parse_sa_config(struct nlattr **attrs, struct nlattr **tb_sa)
+{
+	if (!attrs[MACSEC_ATTR_SA_CONFIG])
+		return -EINVAL;
+
+	if (nla_parse_nested_deprecated(tb_sa, MACSEC_SA_ATTR_MAX, attrs[MACSEC_ATTR_SA_CONFIG], macsec_genl_sa_policy, NULL))
+		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_deprecated(tb_rxsc, MACSEC_RXSC_ATTR_MAX, attrs[MACSEC_ATTR_RXSC_CONFIG], macsec_genl_rxsc_policy, NULL))
+		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_u64(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;
+	}
+
+	if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN)
+		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;
+	int pn_len;
+	struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
+	struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
+	int err;
+
+	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)) {
+		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;
+	}
+
+	pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
+	if (tb_sa[MACSEC_SA_ATTR_PN] &&
+	    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_SALT_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 (!rx_sa) {
+		rtnl_unlock();
+		return -ENOMEM;
+	}
+
+	err = init_rx_sa(rx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
+			 secy->key_len, secy->icv_len);
+	if (err < 0) {
+		kfree(rx_sa);
+		rtnl_unlock();
+		return err;
+	}
+
+	if (tb_sa[MACSEC_SA_ATTR_PN]) {
+		spin_lock_bh(&rx_sa->lock);
+		rx_sa->next_pn = nla_get_u64(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->sc = rx_sc;
+
+	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);
+	}
+
+	/* If h/w offloading is available, propagate to the device */
+	if (macsec_is_offloaded(netdev_priv(dev))) {
+		const struct macsec_ops *ops;
+		struct macsec_context ctx;
+
+		ops = macsec_get_ops(netdev_priv(dev), &ctx);
+		if (!ops) {
+			err = -EOPNOTSUPP;
+			goto cleanup;
+		}
+
+		ctx.sa.assoc_num = assoc_num;
+		ctx.sa.rx_sa = rx_sa;
+		ctx.secy = secy;
+		memcpy(ctx.sa.key, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
+		       secy->key_len);
+
+		err = macsec_offload(ops->mdo_add_rxsa, &ctx);
+		memzero_explicit(ctx.sa.key, secy->key_len);
+		if (err)
+			goto cleanup;
+	}
+
+	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);
+
+	rtnl_unlock();
+
+	return 0;
+
+cleanup:
+	macsec_rxsa_put(rx_sa);
+	rtnl_unlock();
+	return err;
+}
+
+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];
+	struct macsec_secy *secy;
+	bool active = true;
+	int ret;
+
+	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);
+	}
+
+	secy = &macsec_priv(dev)->secy;
+	sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
+
+	if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE])
+		active = nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]);
+
+	rx_sc = create_rx_sc(dev, sci, active);
+	if (IS_ERR(rx_sc)) {
+		rtnl_unlock();
+		return PTR_ERR(rx_sc);
+	}
+
+	if (macsec_is_offloaded(netdev_priv(dev))) {
+		const struct macsec_ops *ops;
+		struct macsec_context ctx;
+
+		ops = macsec_get_ops(netdev_priv(dev), &ctx);
+		if (!ops) {
+			ret = -EOPNOTSUPP;
+			goto cleanup;
+		}
+
+		ctx.rx_sc = rx_sc;
+		ctx.secy = secy;
+
+		ret = macsec_offload(ops->mdo_add_rxsc, &ctx);
+		if (ret)
+			goto cleanup;
+	}
+
+	rtnl_unlock();
+
+	return 0;
+
+cleanup:
+	del_rx_sc(secy, sci);
+	free_rx_sc(rx_sc);
+	rtnl_unlock();
+	return ret;
+}
+
+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_u64(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;
+	}
+
+	if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN)
+		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;
+	int pn_len;
+	struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
+	bool was_operational;
+	int err;
+
+	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;
+	}
+
+	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_SALT_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) {
+		rtnl_unlock();
+		return -ENOMEM;
+	}
+
+	err = init_tx_sa(tx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
+			 secy->key_len, secy->icv_len);
+	if (err < 0) {
+		kfree(tx_sa);
+		rtnl_unlock();
+		return err;
+	}
+
+	spin_lock_bh(&tx_sa->lock);
+	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])
+		tx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
+
+	was_operational = secy->operational;
+	if (assoc_num == tx_sc->encoding_sa && tx_sa->active)
+		secy->operational = true;
+
+	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);
+	}
+
+	/* If h/w offloading is available, propagate to the device */
+	if (macsec_is_offloaded(netdev_priv(dev))) {
+		const struct macsec_ops *ops;
+		struct macsec_context ctx;
+
+		ops = macsec_get_ops(netdev_priv(dev), &ctx);
+		if (!ops) {
+			err = -EOPNOTSUPP;
+			goto cleanup;
+		}
+
+		ctx.sa.assoc_num = assoc_num;
+		ctx.sa.tx_sa = tx_sa;
+		ctx.secy = secy;
+		memcpy(ctx.sa.key, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
+		       secy->key_len);
+
+		err = macsec_offload(ops->mdo_add_txsa, &ctx);
+		memzero_explicit(ctx.sa.key, secy->key_len);
+		if (err)
+			goto cleanup;
+	}
+
+	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);
+
+	rtnl_unlock();
+
+	return 0;
+
+cleanup:
+	secy->operational = was_operational;
+	macsec_txsa_put(tx_sa);
+	rtnl_unlock();
+	return err;
+}
+
+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];
+	int ret;
+
+	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;
+	}
+
+	/* If h/w offloading is available, propagate to the device */
+	if (macsec_is_offloaded(netdev_priv(dev))) {
+		const struct macsec_ops *ops;
+		struct macsec_context ctx;
+
+		ops = macsec_get_ops(netdev_priv(dev), &ctx);
+		if (!ops) {
+			ret = -EOPNOTSUPP;
+			goto cleanup;
+		}
+
+		ctx.sa.assoc_num = assoc_num;
+		ctx.sa.rx_sa = rx_sa;
+		ctx.secy = secy;
+
+		ret = macsec_offload(ops->mdo_del_rxsa, &ctx);
+		if (ret)
+			goto cleanup;
+	}
+
+	RCU_INIT_POINTER(rx_sc->sa[assoc_num], NULL);
+	clear_rx_sa(rx_sa);
+
+	rtnl_unlock();
+
+	return 0;
+
+cleanup:
+	rtnl_unlock();
+	return ret;
+}
+
+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];
+	int ret;
+
+	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;
+	}
+
+	/* If h/w offloading is available, propagate to the device */
+	if (macsec_is_offloaded(netdev_priv(dev))) {
+		const struct macsec_ops *ops;
+		struct macsec_context ctx;
+
+		ops = macsec_get_ops(netdev_priv(dev), &ctx);
+		if (!ops) {
+			ret = -EOPNOTSUPP;
+			goto cleanup;
+		}
+
+		ctx.rx_sc = rx_sc;
+		ctx.secy = secy;
+		ret = macsec_offload(ops->mdo_del_rxsc, &ctx);
+		if (ret)
+			goto cleanup;
+	}
+
+	free_rx_sc(rx_sc);
+	rtnl_unlock();
+
+	return 0;
+
+cleanup:
+	rtnl_unlock();
+	return ret;
+}
+
+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];
+	int ret;
+
+	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;
+	}
+
+	/* If h/w offloading is available, propagate to the device */
+	if (macsec_is_offloaded(netdev_priv(dev))) {
+		const struct macsec_ops *ops;
+		struct macsec_context ctx;
+
+		ops = macsec_get_ops(netdev_priv(dev), &ctx);
+		if (!ops) {
+			ret = -EOPNOTSUPP;
+			goto cleanup;
+		}
+
+		ctx.sa.assoc_num = assoc_num;
+		ctx.sa.tx_sa = tx_sa;
+		ctx.secy = secy;
+
+		ret = macsec_offload(ops->mdo_del_txsa, &ctx);
+		if (ret)
+			goto cleanup;
+	}
+
+	RCU_INIT_POINTER(tx_sc->sa[assoc_num], NULL);
+	clear_tx_sa(tx_sa);
+
+	rtnl_unlock();
+
+	return 0;
+
+cleanup:
+	rtnl_unlock();
+	return ret;
+}
+
+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_SSCI] ||
+	    attrs[MACSEC_SA_ATTR_SALT])
+		return false;
+
+	if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
+		return false;
+
+	if (attrs[MACSEC_SA_ATTR_PN] && nla_get_u64(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];
+	bool was_operational, was_active;
+	pn_t prev_pn;
+	int ret = 0;
+
+	prev_pn.full64 = 0;
+
+	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]) {
+		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 = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
+		spin_unlock_bh(&tx_sa->lock);
+	}
+
+	was_active = tx_sa->active;
+	if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
+		tx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
+
+	was_operational = secy->operational;
+	if (assoc_num == tx_sc->encoding_sa)
+		secy->operational = tx_sa->active;
+
+	/* If h/w offloading is available, propagate to the device */
+	if (macsec_is_offloaded(netdev_priv(dev))) {
+		const struct macsec_ops *ops;
+		struct macsec_context ctx;
+
+		ops = macsec_get_ops(netdev_priv(dev), &ctx);
+		if (!ops) {
+			ret = -EOPNOTSUPP;
+			goto cleanup;
+		}
+
+		ctx.sa.assoc_num = assoc_num;
+		ctx.sa.tx_sa = tx_sa;
+		ctx.sa.update_pn = !!prev_pn.full64;
+		ctx.secy = secy;
+
+		ret = macsec_offload(ops->mdo_upd_txsa, &ctx);
+		if (ret)
+			goto cleanup;
+	}
+
+	rtnl_unlock();
+
+	return 0;
+
+cleanup:
+	if (tb_sa[MACSEC_SA_ATTR_PN]) {
+		spin_lock_bh(&tx_sa->lock);
+		tx_sa->next_pn_halves = prev_pn;
+		spin_unlock_bh(&tx_sa->lock);
+	}
+	tx_sa->active = was_active;
+	secy->operational = was_operational;
+	rtnl_unlock();
+	return ret;
+}
+
+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];
+	bool was_active;
+	pn_t prev_pn;
+	int ret = 0;
+
+	prev_pn.full64 = 0;
+
+	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]) {
+		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 = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
+		spin_unlock_bh(&rx_sa->lock);
+	}
+
+	was_active = rx_sa->active;
+	if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
+		rx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
+
+	/* If h/w offloading is available, propagate to the device */
+	if (macsec_is_offloaded(netdev_priv(dev))) {
+		const struct macsec_ops *ops;
+		struct macsec_context ctx;
+
+		ops = macsec_get_ops(netdev_priv(dev), &ctx);
+		if (!ops) {
+			ret = -EOPNOTSUPP;
+			goto cleanup;
+		}
+
+		ctx.sa.assoc_num = assoc_num;
+		ctx.sa.rx_sa = rx_sa;
+		ctx.sa.update_pn = !!prev_pn.full64;
+		ctx.secy = secy;
+
+		ret = macsec_offload(ops->mdo_upd_rxsa, &ctx);
+		if (ret)
+			goto cleanup;
+	}
+
+	rtnl_unlock();
+	return 0;
+
+cleanup:
+	if (tb_sa[MACSEC_SA_ATTR_PN]) {
+		spin_lock_bh(&rx_sa->lock);
+		rx_sa->next_pn_halves = prev_pn;
+		spin_unlock_bh(&rx_sa->lock);
+	}
+	rx_sa->active = was_active;
+	rtnl_unlock();
+	return ret;
+}
+
+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];
+	unsigned int prev_n_rx_sc;
+	bool was_active;
+	int ret;
+
+	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);
+	}
+
+	was_active = rx_sc->active;
+	prev_n_rx_sc = secy->n_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;
+	}
+
+	/* If h/w offloading is available, propagate to the device */
+	if (macsec_is_offloaded(netdev_priv(dev))) {
+		const struct macsec_ops *ops;
+		struct macsec_context ctx;
+
+		ops = macsec_get_ops(netdev_priv(dev), &ctx);
+		if (!ops) {
+			ret = -EOPNOTSUPP;
+			goto cleanup;
+		}
+
+		ctx.rx_sc = rx_sc;
+		ctx.secy = secy;
+
+		ret = macsec_offload(ops->mdo_upd_rxsc, &ctx);
+		if (ret)
+			goto cleanup;
+	}
+
+	rtnl_unlock();
+
+	return 0;
+
+cleanup:
+	secy->n_rx_sc = prev_n_rx_sc;
+	rx_sc->active = was_active;
+	rtnl_unlock();
+	return ret;
+}
+
+static bool macsec_is_configured(struct macsec_dev *macsec)
+{
+	struct macsec_secy *secy = &macsec->secy;
+	struct macsec_tx_sc *tx_sc = &secy->tx_sc;
+	int i;
+
+	if (secy->rx_sc)
+		return true;
+
+	for (i = 0; i < MACSEC_NUM_AN; i++)
+		if (tx_sc->sa[i])
+			return true;
+
+	return false;
+}
+
+static int macsec_upd_offload(struct sk_buff *skb, struct genl_info *info)
+{
+	struct nlattr *tb_offload[MACSEC_OFFLOAD_ATTR_MAX + 1];
+	enum macsec_offload offload, prev_offload;
+	int (*func)(struct macsec_context *ctx);
+	struct nlattr **attrs = info->attrs;
+	struct net_device *dev;
+	const struct macsec_ops *ops;
+	struct macsec_context ctx;
+	struct macsec_dev *macsec;
+	int ret = 0;
+
+	if (!attrs[MACSEC_ATTR_IFINDEX])
+		return -EINVAL;
+
+	if (!attrs[MACSEC_ATTR_OFFLOAD])
+		return -EINVAL;
+
+	if (nla_parse_nested_deprecated(tb_offload, MACSEC_OFFLOAD_ATTR_MAX,
+					attrs[MACSEC_ATTR_OFFLOAD],
+					macsec_genl_offload_policy, NULL))
+		return -EINVAL;
+
+	rtnl_lock();
+
+	dev = get_dev_from_nl(genl_info_net(info), attrs);
+	if (IS_ERR(dev)) {
+		ret = PTR_ERR(dev);
+		goto out;
+	}
+	macsec = macsec_priv(dev);
+
+	if (!tb_offload[MACSEC_OFFLOAD_ATTR_TYPE]) {
+		ret = -EINVAL;
+		goto out;
+	}
+
+	offload = nla_get_u8(tb_offload[MACSEC_OFFLOAD_ATTR_TYPE]);
+	if (macsec->offload == offload)
+		goto out;
+
+	/* Check if the offloading mode is supported by the underlying layers */
+	if (offload != MACSEC_OFFLOAD_OFF &&
+	    !macsec_check_offload(offload, macsec)) {
+		ret = -EOPNOTSUPP;
+		goto out;
+	}
+
+	/* Check if the net device is busy. */
+	if (netif_running(dev)) {
+		ret = -EBUSY;
+		goto out;
+	}
+
+	prev_offload = macsec->offload;
+	macsec->offload = offload;
+
+	/* Check if the device already has rules configured: we do not support
+	 * rules migration.
+	 */
+	if (macsec_is_configured(macsec)) {
+		ret = -EBUSY;
+		goto rollback;
+	}
+
+	ops = __macsec_get_ops(offload == MACSEC_OFFLOAD_OFF ? prev_offload : offload,
+			       macsec, &ctx);
+	if (!ops) {
+		ret = -EOPNOTSUPP;
+		goto rollback;
+	}
+
+	if (prev_offload == MACSEC_OFFLOAD_OFF)
+		func = ops->mdo_add_secy;
+	else
+		func = ops->mdo_del_secy;
+
+	ctx.secy = &macsec->secy;
+	ret = macsec_offload(func, &ctx);
+	if (ret)
+		goto rollback;
+
+	rtnl_unlock();
+	return 0;
+
+rollback:
+	macsec->offload = prev_offload;
+out:
+	rtnl_unlock();
+	return ret;
+}
+
+static void get_tx_sa_stats(struct net_device *dev, int an,
+			    struct macsec_tx_sa *tx_sa,
+			    struct macsec_tx_sa_stats *sum)
+{
+	struct macsec_dev *macsec = macsec_priv(dev);
+	int cpu;
+
+	/* If h/w offloading is available, propagate to the device */
+	if (macsec_is_offloaded(macsec)) {
+		const struct macsec_ops *ops;
+		struct macsec_context ctx;
+
+		ops = macsec_get_ops(macsec, &ctx);
+		if (ops) {
+			ctx.sa.assoc_num = an;
+			ctx.sa.tx_sa = tx_sa;
+			ctx.stats.tx_sa_stats = sum;
+			ctx.secy = &macsec_priv(dev)->secy;
+			macsec_offload(ops->mdo_get_tx_sa_stats, &ctx);
+		}
+		return;
+	}
+
+	for_each_possible_cpu(cpu) {
+		const struct macsec_tx_sa_stats *stats =
+			per_cpu_ptr(tx_sa->stats, cpu);
+
+		sum->OutPktsProtected += stats->OutPktsProtected;
+		sum->OutPktsEncrypted += stats->OutPktsEncrypted;
+	}
+}
+
+static int copy_tx_sa_stats(struct sk_buff *skb, struct macsec_tx_sa_stats *sum)
+{
+	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 void get_rx_sa_stats(struct net_device *dev,
+			    struct macsec_rx_sc *rx_sc, int an,
+			    struct macsec_rx_sa *rx_sa,
+			    struct macsec_rx_sa_stats *sum)
+{
+	struct macsec_dev *macsec = macsec_priv(dev);
+	int cpu;
+
+	/* If h/w offloading is available, propagate to the device */
+	if (macsec_is_offloaded(macsec)) {
+		const struct macsec_ops *ops;
+		struct macsec_context ctx;
+
+		ops = macsec_get_ops(macsec, &ctx);
+		if (ops) {
+			ctx.sa.assoc_num = an;
+			ctx.sa.rx_sa = rx_sa;
+			ctx.stats.rx_sa_stats = sum;
+			ctx.secy = &macsec_priv(dev)->secy;
+			ctx.rx_sc = rx_sc;
+			macsec_offload(ops->mdo_get_rx_sa_stats, &ctx);
+		}
+		return;
+	}
+
+	for_each_possible_cpu(cpu) {
+		const struct macsec_rx_sa_stats *stats =
+			per_cpu_ptr(rx_sa->stats, cpu);
+
+		sum->InPktsOK         += stats->InPktsOK;
+		sum->InPktsInvalid    += stats->InPktsInvalid;
+		sum->InPktsNotValid   += stats->InPktsNotValid;
+		sum->InPktsNotUsingSA += stats->InPktsNotUsingSA;
+		sum->InPktsUnusedSA   += stats->InPktsUnusedSA;
+	}
+}
+
+static int copy_rx_sa_stats(struct sk_buff *skb,
+			    struct macsec_rx_sa_stats *sum)
+{
+	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 void get_rx_sc_stats(struct net_device *dev,
+			    struct macsec_rx_sc *rx_sc,
+			    struct macsec_rx_sc_stats *sum)
+{
+	struct macsec_dev *macsec = macsec_priv(dev);
+	int cpu;
+
+	/* If h/w offloading is available, propagate to the device */
+	if (macsec_is_offloaded(macsec)) {
+		const struct macsec_ops *ops;
+		struct macsec_context ctx;
+
+		ops = macsec_get_ops(macsec, &ctx);
+		if (ops) {
+			ctx.stats.rx_sc_stats = sum;
+			ctx.secy = &macsec_priv(dev)->secy;
+			ctx.rx_sc = rx_sc;
+			macsec_offload(ops->mdo_get_rx_sc_stats, &ctx);
+		}
+		return;
+	}
+
+	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(rx_sc->stats, 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;
+	}
+}
+
+static int copy_rx_sc_stats(struct sk_buff *skb, struct macsec_rx_sc_stats *sum)
+{
+	if (nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_VALIDATED,
+			      sum->InOctetsValidated,
+			      MACSEC_RXSC_STATS_ATTR_PAD) ||
+	    nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_DECRYPTED,
+			      sum->InOctetsDecrypted,
+			      MACSEC_RXSC_STATS_ATTR_PAD) ||
+	    nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNCHECKED,
+			      sum->InPktsUnchecked,
+			      MACSEC_RXSC_STATS_ATTR_PAD) ||
+	    nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_DELAYED,
+			      sum->InPktsDelayed,
+			      MACSEC_RXSC_STATS_ATTR_PAD) ||
+	    nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_OK,
+			      sum->InPktsOK,
+			      MACSEC_RXSC_STATS_ATTR_PAD) ||
+	    nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_INVALID,
+			      sum->InPktsInvalid,
+			      MACSEC_RXSC_STATS_ATTR_PAD) ||
+	    nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_LATE,
+			      sum->InPktsLate,
+			      MACSEC_RXSC_STATS_ATTR_PAD) ||
+	    nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_VALID,
+			      sum->InPktsNotValid,
+			      MACSEC_RXSC_STATS_ATTR_PAD) ||
+	    nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_USING_SA,
+			      sum->InPktsNotUsingSA,
+			      MACSEC_RXSC_STATS_ATTR_PAD) ||
+	    nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNUSED_SA,
+			      sum->InPktsUnusedSA,
+			      MACSEC_RXSC_STATS_ATTR_PAD))
+		return -EMSGSIZE;
+
+	return 0;
+}
+
+static void get_tx_sc_stats(struct net_device *dev,
+			    struct macsec_tx_sc_stats *sum)
+{
+	struct macsec_dev *macsec = macsec_priv(dev);
+	int cpu;
+
+	/* If h/w offloading is available, propagate to the device */
+	if (macsec_is_offloaded(macsec)) {
+		const struct macsec_ops *ops;
+		struct macsec_context ctx;
+
+		ops = macsec_get_ops(macsec, &ctx);
+		if (ops) {
+			ctx.stats.tx_sc_stats = sum;
+			ctx.secy = &macsec_priv(dev)->secy;
+			macsec_offload(ops->mdo_get_tx_sc_stats, &ctx);
+		}
+		return;
+	}
+
+	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(macsec_priv(dev)->secy.tx_sc.stats, 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;
+	}
+}
+
+static int copy_tx_sc_stats(struct sk_buff *skb, struct macsec_tx_sc_stats *sum)
+{
+	if (nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_PROTECTED,
+			      sum->OutPktsProtected,
+			      MACSEC_TXSC_STATS_ATTR_PAD) ||
+	    nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_ENCRYPTED,
+			      sum->OutPktsEncrypted,
+			      MACSEC_TXSC_STATS_ATTR_PAD) ||
+	    nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_PROTECTED,
+			      sum->OutOctetsProtected,
+			      MACSEC_TXSC_STATS_ATTR_PAD) ||
+	    nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_ENCRYPTED,
+			      sum->OutOctetsEncrypted,
+			      MACSEC_TXSC_STATS_ATTR_PAD))
+		return -EMSGSIZE;
+
+	return 0;
+}
+
+static void get_secy_stats(struct net_device *dev, struct macsec_dev_stats *sum)
+{
+	struct macsec_dev *macsec = macsec_priv(dev);
+	int cpu;
+
+	/* If h/w offloading is available, propagate to the device */
+	if (macsec_is_offloaded(macsec)) {
+		const struct macsec_ops *ops;
+		struct macsec_context ctx;
+
+		ops = macsec_get_ops(macsec, &ctx);
+		if (ops) {
+			ctx.stats.dev_stats = sum;
+			ctx.secy = &macsec_priv(dev)->secy;
+			macsec_offload(ops->mdo_get_dev_stats, &ctx);
+		}
+		return;
+	}
+
+	for_each_possible_cpu(cpu) {
+		const struct pcpu_secy_stats *stats;
+		struct macsec_dev_stats tmp;
+		unsigned int start;
+
+		stats = per_cpu_ptr(macsec_priv(dev)->stats, 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;
+	}
+}
+
+static int copy_secy_stats(struct sk_buff *skb, struct macsec_dev_stats *sum)
+{
+	if (nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_UNTAGGED,
+			      sum->OutPktsUntagged,
+			      MACSEC_SECY_STATS_ATTR_PAD) ||
+	    nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNTAGGED,
+			      sum->InPktsUntagged,
+			      MACSEC_SECY_STATS_ATTR_PAD) ||
+	    nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_TOO_LONG,
+			      sum->OutPktsTooLong,
+			      MACSEC_SECY_STATS_ATTR_PAD) ||
+	    nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_TAG,
+			      sum->InPktsNoTag,
+			      MACSEC_SECY_STATS_ATTR_PAD) ||
+	    nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_BAD_TAG,
+			      sum->InPktsBadTag,
+			      MACSEC_SECY_STATS_ATTR_PAD) ||
+	    nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNKNOWN_SCI,
+			      sum->InPktsUnknownSCI,
+			      MACSEC_SECY_STATS_ATTR_PAD) ||
+	    nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_SCI,
+			      sum->InPktsNoSCI,
+			      MACSEC_SECY_STATS_ATTR_PAD) ||
+	    nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_OVERRUN,
+			      sum->InPktsOverrun,
+			      MACSEC_SECY_STATS_ATTR_PAD))
+		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_noflag(skb,
+							 MACSEC_ATTR_SECY);
+	u64 csid;
+
+	if (!secy_nest)
+		return 1;
+
+	switch (secy->key_len) {
+	case MACSEC_GCM_AES_128_SAK_LEN:
+		csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_128 : MACSEC_DEFAULT_CIPHER_ID;
+		break;
+	case MACSEC_GCM_AES_256_SAK_LEN:
+		csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_256 : MACSEC_CIPHER_ID_GCM_AES_256;
+		break;
+	default:
+		goto cancel;
+	}
+
+	if (nla_put_sci(skb, MACSEC_SECY_ATTR_SCI, secy->sci,
+			MACSEC_SECY_ATTR_PAD) ||
+	    nla_put_u64_64bit(skb, MACSEC_SECY_ATTR_CIPHER_SUITE,
+			      csid, MACSEC_SECY_ATTR_PAD) ||
+	    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 noinline_for_stack int
+dump_secy(struct macsec_secy *secy, struct net_device *dev,
+	  struct sk_buff *skb, struct netlink_callback *cb)
+{
+	struct macsec_tx_sc_stats tx_sc_stats = {0, };
+	struct macsec_tx_sa_stats tx_sa_stats = {0, };
+	struct macsec_rx_sc_stats rx_sc_stats = {0, };
+	struct macsec_rx_sa_stats rx_sa_stats = {0, };
+	struct macsec_dev *macsec = netdev_priv(dev);
+	struct macsec_dev_stats dev_stats = {0, };
+	struct macsec_tx_sc *tx_sc = &secy->tx_sc;
+	struct nlattr *txsa_list, *rxsc_list;
+	struct macsec_rx_sc *rx_sc;
+	struct nlattr *attr;
+	void *hdr;
+	int i, j;
+
+	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;
+
+	genl_dump_check_consistent(cb, hdr);
+
+	if (nla_put_u32(skb, MACSEC_ATTR_IFINDEX, dev->ifindex))
+		goto nla_put_failure;
+
+	attr = nla_nest_start_noflag(skb, MACSEC_ATTR_OFFLOAD);
+	if (!attr)
+		goto nla_put_failure;
+	if (nla_put_u8(skb, MACSEC_OFFLOAD_ATTR_TYPE, macsec->offload))
+		goto nla_put_failure;
+	nla_nest_end(skb, attr);
+
+	if (nla_put_secy(secy, skb))
+		goto nla_put_failure;
+
+	attr = nla_nest_start_noflag(skb, MACSEC_ATTR_TXSC_STATS);
+	if (!attr)
+		goto nla_put_failure;
+
+	get_tx_sc_stats(dev, &tx_sc_stats);
+	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_noflag(skb, MACSEC_ATTR_SECY_STATS);
+	if (!attr)
+		goto nla_put_failure;
+	get_secy_stats(dev, &dev_stats);
+	if (copy_secy_stats(skb, &dev_stats)) {
+		nla_nest_cancel(skb, attr);
+		goto nla_put_failure;
+	}
+	nla_nest_end(skb, attr);
+
+	txsa_list = nla_nest_start_noflag(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;
+		u64 pn;
+		int pn_len;
+
+		if (!tx_sa)
+			continue;
+
+		txsa_nest = nla_nest_start_noflag(skb, j++);
+		if (!txsa_nest) {
+			nla_nest_cancel(skb, txsa_list);
+			goto nla_put_failure;
+		}
+
+		attr = nla_nest_start_noflag(skb, MACSEC_SA_ATTR_STATS);
+		if (!attr) {
+			nla_nest_cancel(skb, txsa_nest);
+			nla_nest_cancel(skb, txsa_list);
+			goto nla_put_failure;
+		}
+		memset(&tx_sa_stats, 0, sizeof(tx_sa_stats));
+		get_tx_sa_stats(dev, i, tx_sa, &tx_sa_stats);
+		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);
+
+		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(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);
+			goto nla_put_failure;
+		}
+
+		nla_nest_end(skb, txsa_nest);
+	}
+	nla_nest_end(skb, txsa_list);
+
+	rxsc_list = nla_nest_start_noflag(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_noflag(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,
+				MACSEC_RXSC_ATTR_PAD)) {
+			nla_nest_cancel(skb, rxsc_nest);
+			nla_nest_cancel(skb, rxsc_list);
+			goto nla_put_failure;
+		}
+
+		attr = nla_nest_start_noflag(skb, MACSEC_RXSC_ATTR_STATS);
+		if (!attr) {
+			nla_nest_cancel(skb, rxsc_nest);
+			nla_nest_cancel(skb, rxsc_list);
+			goto nla_put_failure;
+		}
+		memset(&rx_sc_stats, 0, sizeof(rx_sc_stats));
+		get_rx_sc_stats(dev, rx_sc, &rx_sc_stats);
+		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_noflag(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;
+			u64 pn;
+			int pn_len;
+
+			if (!rx_sa)
+				continue;
+
+			rxsa_nest = nla_nest_start_noflag(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_noflag(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;
+			}
+			memset(&rx_sa_stats, 0, sizeof(rx_sa_stats));
+			get_rx_sa_stats(dev, rx_sc, i, rx_sa, &rx_sa_stats);
+			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 (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(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);
+				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);
+
+	genlmsg_end(skb, hdr);
+
+	return 0;
+
+nla_put_failure:
+	genlmsg_cancel(skb, hdr);
+	return -EMSGSIZE;
+}
+
+static int macsec_generation = 1; /* protected by RTNL */
+
+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;
+	rtnl_lock();
+
+	cb->seq = macsec_generation;
+
+	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:
+	rtnl_unlock();
+	cb->args[0] = d;
+	return skb->len;
+}
+
+static const struct genl_small_ops macsec_genl_ops[] = {
+	{
+		.cmd = MACSEC_CMD_GET_TXSC,
+		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+		.dumpit = macsec_dump_txsc,
+	},
+	{
+		.cmd = MACSEC_CMD_ADD_RXSC,
+		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+		.doit = macsec_add_rxsc,
+		.flags = GENL_ADMIN_PERM,
+	},
+	{
+		.cmd = MACSEC_CMD_DEL_RXSC,
+		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+		.doit = macsec_del_rxsc,
+		.flags = GENL_ADMIN_PERM,
+	},
+	{
+		.cmd = MACSEC_CMD_UPD_RXSC,
+		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+		.doit = macsec_upd_rxsc,
+		.flags = GENL_ADMIN_PERM,
+	},
+	{
+		.cmd = MACSEC_CMD_ADD_TXSA,
+		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+		.doit = macsec_add_txsa,
+		.flags = GENL_ADMIN_PERM,
+	},
+	{
+		.cmd = MACSEC_CMD_DEL_TXSA,
+		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+		.doit = macsec_del_txsa,
+		.flags = GENL_ADMIN_PERM,
+	},
+	{
+		.cmd = MACSEC_CMD_UPD_TXSA,
+		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+		.doit = macsec_upd_txsa,
+		.flags = GENL_ADMIN_PERM,
+	},
+	{
+		.cmd = MACSEC_CMD_ADD_RXSA,
+		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+		.doit = macsec_add_rxsa,
+		.flags = GENL_ADMIN_PERM,
+	},
+	{
+		.cmd = MACSEC_CMD_DEL_RXSA,
+		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+		.doit = macsec_del_rxsa,
+		.flags = GENL_ADMIN_PERM,
+	},
+	{
+		.cmd = MACSEC_CMD_UPD_RXSA,
+		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+		.doit = macsec_upd_rxsa,
+		.flags = GENL_ADMIN_PERM,
+	},
+	{
+		.cmd = MACSEC_CMD_UPD_OFFLOAD,
+		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+		.doit = macsec_upd_offload,
+		.flags = GENL_ADMIN_PERM,
+	},
+};
+
+static struct genl_family macsec_fam __ro_after_init = {
+	.name		= MACSEC_GENL_NAME,
+	.hdrsize	= 0,
+	.version	= MACSEC_GENL_VERSION,
+	.maxattr	= MACSEC_ATTR_MAX,
+	.policy = macsec_genl_policy,
+	.netnsok	= true,
+	.module		= THIS_MODULE,
+	.small_ops	= macsec_genl_ops,
+	.n_small_ops	= ARRAY_SIZE(macsec_genl_ops),
+	.resv_start_op	= MACSEC_CMD_UPD_OFFLOAD + 1,
+};
+
+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;
+
+	if (macsec_is_offloaded(netdev_priv(dev))) {
+		struct metadata_dst *md_dst = secy->tx_sc.md_dst;
+
+		skb_dst_drop(skb);
+		dst_hold(&md_dst->dst);
+		skb_dst_set(skb, &md_dst->dst);
+		skb->dev = macsec->real_dev;
+		return dev_queue_xmit(skb);
+	}
+
+	/* 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);
+		skb->dev = macsec->real_dev;
+		len = skb->len;
+		ret = dev_queue_xmit(skb);
+		count_tx(dev, ret, len);
+		return ret;
+	}
+
+	if (!secy->operational) {
+		kfree_skb(skb);
+		DEV_STATS_INC(dev, tx_dropped);
+		return NETDEV_TX_OK;
+	}
+
+	len = skb->len;
+	skb = macsec_encrypt(skb, dev);
+	if (IS_ERR(skb)) {
+		if (PTR_ERR(skb) != -EINPROGRESS)
+			DEV_STATS_INC(dev, 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);
+	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;
+	int err;
+
+	dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
+	if (!dev->tstats)
+		return -ENOMEM;
+
+	err = gro_cells_init(&macsec->gro_cells, dev);
+	if (err) {
+		free_percpu(dev->tstats);
+		return err;
+	}
+
+	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);
+
+	/* Get macsec's reference to real_dev */
+	netdev_hold(real_dev, &macsec->dev_tracker, GFP_KERNEL);
+
+	return 0;
+}
+
+static void macsec_dev_uninit(struct net_device *dev)
+{
+	struct macsec_dev *macsec = macsec_priv(dev);
+
+	gro_cells_destroy(&macsec->gro_cells);
+	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) |
+		    NETIF_F_GSO_SOFTWARE | NETIF_F_SOFT_FEATURES;
+	features |= NETIF_F_LLTX;
+
+	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;
+
+	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 h/w offloading is available, propagate to the device */
+	if (macsec_is_offloaded(macsec)) {
+		const struct macsec_ops *ops;
+		struct macsec_context ctx;
+
+		ops = macsec_get_ops(netdev_priv(dev), &ctx);
+		if (!ops) {
+			err = -EOPNOTSUPP;
+			goto clear_allmulti;
+		}
+
+		ctx.secy = &macsec->secy;
+		err = macsec_offload(ops->mdo_dev_open, &ctx);
+		if (err)
+			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);
+
+	/* If h/w offloading is available, propagate to the device */
+	if (macsec_is_offloaded(macsec)) {
+		const struct macsec_ops *ops;
+		struct macsec_context ctx;
+
+		ops = macsec_get_ops(macsec, &ctx);
+		if (ops) {
+			ctx.secy = &macsec->secy;
+			macsec_offload(ops->mdo_dev_stop, &ctx);
+		}
+	}
+
+	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:
+	eth_hw_addr_set(dev, addr->sa_data);
+
+	/* If h/w offloading is available, propagate to the device */
+	if (macsec_is_offloaded(macsec)) {
+		const struct macsec_ops *ops;
+		struct macsec_context ctx;
+
+		ops = macsec_get_ops(macsec, &ctx);
+		if (ops) {
+			ctx.secy = &macsec->secy;
+			macsec_offload(ops->mdo_upd_secy, &ctx);
+		}
+	}
+
+	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 void macsec_get_stats64(struct net_device *dev,
+			       struct rtnl_link_stats64 *s)
+{
+	if (!dev->tstats)
+		return;
+
+	dev_fetch_sw_netstats(s, dev->tstats);
+
+	s->rx_dropped = DEV_STATS_READ(dev, rx_dropped);
+	s->tx_dropped = DEV_STATS_READ(dev, tx_dropped);
+	s->rx_errors = DEV_STATS_READ(dev, rx_errors);
+}
+
+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_PORT] = { .type = NLA_U16 },
+	[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 },
+	[IFLA_MACSEC_OFFLOAD] = { .type = NLA_U8 },
+};
+
+static void macsec_free_netdev(struct net_device *dev)
+{
+	struct macsec_dev *macsec = macsec_priv(dev);
+
+	if (macsec->secy.tx_sc.md_dst)
+		metadata_dst_free(macsec->secy.tx_sc.md_dst);
+	free_percpu(macsec->stats);
+	free_percpu(macsec->secy.tx_sc.stats);
+
+	/* Get rid of the macsec's reference to real_dev */
+	netdev_put(macsec->real_dev, &macsec->dev_tracker);
+}
+
+static void macsec_setup(struct net_device *dev)
+{
+	ether_setup(dev);
+	dev->min_mtu = 0;
+	dev->max_mtu = ETH_MAX_MTU;
+	dev->priv_flags |= IFF_NO_QUEUE;
+	dev->netdev_ops = &macsec_netdev_ops;
+	dev->needs_free_netdev = true;
+	dev->priv_destructor = macsec_free_netdev;
+	SET_NETDEV_DEVTYPE(dev, &macsec_type);
+
+	eth_zero_addr(dev->broadcast);
+}
+
+static int 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_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]);
+
+	if (data[IFLA_MACSEC_CIPHER_SUITE]) {
+		switch (nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE])) {
+		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;
+		}
+	}
+
+	if (data[IFLA_MACSEC_WINDOW]) {
+		secy->replay_window = nla_get_u32(data[IFLA_MACSEC_WINDOW]);
+
+		/* IEEE 802.1AEbw-2013 10.7.8 - maximum replay window
+		 * for XPN cipher suites */
+		if (secy->xpn &&
+		    secy->replay_window > MACSEC_XPN_MAX_REPLAY_WINDOW)
+			return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int macsec_changelink(struct net_device *dev, struct nlattr *tb[],
+			     struct nlattr *data[],
+			     struct netlink_ext_ack *extack)
+{
+	struct macsec_dev *macsec = macsec_priv(dev);
+	struct macsec_tx_sc tx_sc;
+	struct macsec_secy secy;
+	int ret;
+
+	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;
+
+	/* Keep a copy of unmodified secy and tx_sc, in case the offload
+	 * propagation fails, to revert macsec_changelink_common.
+	 */
+	memcpy(&secy, &macsec->secy, sizeof(secy));
+	memcpy(&tx_sc, &macsec->secy.tx_sc, sizeof(tx_sc));
+
+	ret = macsec_changelink_common(dev, data);
+	if (ret)
+		goto cleanup;
+
+	/* If h/w offloading is available, propagate to the device */
+	if (macsec_is_offloaded(macsec)) {
+		const struct macsec_ops *ops;
+		struct macsec_context ctx;
+
+		ops = macsec_get_ops(netdev_priv(dev), &ctx);
+		if (!ops) {
+			ret = -EOPNOTSUPP;
+			goto cleanup;
+		}
+
+		ctx.secy = &macsec->secy;
+		ret = macsec_offload(ops->mdo_upd_secy, &ctx);
+		if (ret)
+			goto cleanup;
+	}
+
+	return 0;
+
+cleanup:
+	memcpy(&macsec->secy.tx_sc, &tx_sc, sizeof(tx_sc));
+	memcpy(&macsec->secy, &secy, sizeof(secy));
+
+	return ret;
+}
+
+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_common_dellink(struct net_device *dev, struct list_head *head)
+{
+	struct macsec_dev *macsec = macsec_priv(dev);
+	struct net_device *real_dev = macsec->real_dev;
+
+	/* If h/w offloading is available, propagate to the device */
+	if (macsec_is_offloaded(macsec)) {
+		const struct macsec_ops *ops;
+		struct macsec_context ctx;
+
+		ops = macsec_get_ops(netdev_priv(dev), &ctx);
+		if (ops) {
+			ctx.secy = &macsec->secy;
+			macsec_offload(ops->mdo_del_secy, &ctx);
+		}
+	}
+
+	unregister_netdevice_queue(dev, head);
+	list_del_rcu(&macsec->secys);
+	macsec_del_dev(macsec);
+	netdev_upper_dev_unlink(real_dev, dev);
+
+	macsec_generation++;
+}
+
+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);
+
+	macsec_common_dellink(dev, head);
+
+	if (list_empty(&rxd->secys)) {
+		netdev_rx_handler_unregister(real_dev);
+		kfree(rxd);
+	}
+}
+
+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) {
+			kfree(rxd);
+			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)
+		return -ENOMEM;
+
+	secy->tx_sc.md_dst = metadata_dst_alloc(0, METADATA_MACSEC, GFP_KERNEL);
+	if (!secy->tx_sc.md_dst)
+		/* macsec and secy percpu stats will be freed when unregistering
+		 * net_device in macsec_free_netdev()
+		 */
+		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->xpn = DEFAULT_XPN;
+
+	secy->sci = sci;
+	secy->tx_sc.md_dst->u.macsec_info.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 struct lock_class_key macsec_netdev_addr_lock_key;
+
+static int macsec_newlink(struct net *net, struct net_device *dev,
+			  struct nlattr *tb[], struct nlattr *data[],
+			  struct netlink_ext_ack *extack)
+{
+	struct macsec_dev *macsec = macsec_priv(dev);
+	rx_handler_func_t *rx_handler;
+	u8 icv_len = MACSEC_DEFAULT_ICV_LEN;
+	struct net_device *real_dev;
+	int err, mtu;
+	sci_t sci;
+
+	if (!tb[IFLA_LINK])
+		return -EINVAL;
+	real_dev = __dev_get_by_index(net, nla_get_u32(tb[IFLA_LINK]));
+	if (!real_dev)
+		return -ENODEV;
+	if (real_dev->type != ARPHRD_ETHER)
+		return -EINVAL;
+
+	dev->priv_flags |= IFF_MACSEC;
+
+	macsec->real_dev = real_dev;
+
+	if (data && data[IFLA_MACSEC_OFFLOAD])
+		macsec->offload = nla_get_offload(data[IFLA_MACSEC_OFFLOAD]);
+	else
+		/* MACsec offloading is off by default */
+		macsec->offload = MACSEC_OFFLOAD_OFF;
+
+	/* Check if the offloading mode is supported by the underlying layers */
+	if (macsec->offload != MACSEC_OFFLOAD_OFF &&
+	    !macsec_check_offload(macsec->offload, macsec))
+		return -EOPNOTSUPP;
+
+	/* send_sci must be set to true when transmit sci explicitly is set */
+	if ((data && data[IFLA_MACSEC_SCI]) &&
+	    (data && data[IFLA_MACSEC_INC_SCI])) {
+		u8 send_sci = !!nla_get_u8(data[IFLA_MACSEC_INC_SCI]);
+
+		if (!send_sci)
+			return -EINVAL;
+	}
+
+	if (data && data[IFLA_MACSEC_ICV_LEN])
+		icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]);
+	mtu = real_dev->mtu - icv_len - macsec_extra_len(true);
+	if (mtu < 0)
+		dev->mtu = 0;
+	else
+		dev->mtu = mtu;
+
+	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;
+
+	netdev_lockdep_set_classes(dev);
+	lockdep_set_class(&dev->addr_list_lock,
+			  &macsec_netdev_addr_lock_key);
+
+	err = netdev_upper_dev_link(real_dev, dev, extack);
+	if (err < 0)
+		goto unregister;
+
+	/* 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 unlink;
+	}
+
+	err = macsec_add_dev(dev, sci, icv_len);
+	if (err)
+		goto unlink;
+
+	if (data) {
+		err = macsec_changelink_common(dev, data);
+		if (err)
+			goto del_dev;
+	}
+
+	/* If h/w offloading is available, propagate to the device */
+	if (macsec_is_offloaded(macsec)) {
+		const struct macsec_ops *ops;
+		struct macsec_context ctx;
+
+		ops = macsec_get_ops(macsec, &ctx);
+		if (ops) {
+			ctx.secy = &macsec->secy;
+			err = macsec_offload(ops->mdo_add_secy, &ctx);
+			if (err)
+				goto del_dev;
+		}
+	}
+
+	err = register_macsec_dev(real_dev, dev);
+	if (err < 0)
+		goto del_dev;
+
+	netif_stacked_transfer_operstate(real_dev, dev);
+	linkwatch_fire_event(dev);
+
+	macsec_generation++;
+
+	return 0;
+
+del_dev:
+	macsec_del_dev(macsec);
+unlink:
+	netdev_upper_dev_unlink(real_dev, dev);
+unregister:
+	unregister_netdevice(dev);
+	return err;
+}
+
+static int macsec_validate_attr(struct nlattr *tb[], struct nlattr *data[],
+				struct netlink_ext_ack *extack)
+{
+	u64 csid = MACSEC_DEFAULT_CIPHER_ID;
+	u8 icv_len = MACSEC_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]);
+		if (icv_len != MACSEC_DEFAULT_ICV_LEN) {
+			char dummy_key[DEFAULT_SAK_LEN] = { 0 };
+			struct crypto_aead *dummy_tfm;
+
+			dummy_tfm = macsec_alloc_tfm(dummy_key,
+						     DEFAULT_SAK_LEN,
+						     icv_len);
+			if (IS_ERR(dummy_tfm))
+				return PTR_ERR(dummy_tfm);
+			crypto_free_aead(dummy_tfm);
+		}
+	}
+
+	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)
+			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_REPLAY_PROTECT] &&
+	     nla_get_u8(data[IFLA_MACSEC_REPLAY_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  nla_total_size_64bit(8) + /* IFLA_MACSEC_SCI */
+		nla_total_size(1) + /* IFLA_MACSEC_ICV_LEN */
+		nla_total_size_64bit(8) + /* IFLA_MACSEC_CIPHER_SUITE */
+		nla_total_size(4) + /* IFLA_MACSEC_WINDOW */
+		nla_total_size(1) + /* IFLA_MACSEC_ENCODING_SA */
+		nla_total_size(1) + /* IFLA_MACSEC_ENCRYPT */
+		nla_total_size(1) + /* IFLA_MACSEC_PROTECT */
+		nla_total_size(1) + /* IFLA_MACSEC_INC_SCI */
+		nla_total_size(1) + /* IFLA_MACSEC_ES */
+		nla_total_size(1) + /* IFLA_MACSEC_SCB */
+		nla_total_size(1) + /* IFLA_MACSEC_REPLAY_PROTECT */
+		nla_total_size(1) + /* IFLA_MACSEC_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;
+	u64 csid;
+
+	switch (secy->key_len) {
+	case MACSEC_GCM_AES_128_SAK_LEN:
+		csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_128 : MACSEC_DEFAULT_CIPHER_ID;
+		break;
+	case MACSEC_GCM_AES_256_SAK_LEN:
+		csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_256 : MACSEC_CIPHER_ID_GCM_AES_256;
+		break;
+	default:
+		goto nla_put_failure;
+	}
+
+	if (nla_put_sci(skb, IFLA_MACSEC_SCI, secy->sci,
+			IFLA_MACSEC_PAD) ||
+	    nla_put_u8(skb, IFLA_MACSEC_ICV_LEN, secy->icv_len) ||
+	    nla_put_u64_64bit(skb, IFLA_MACSEC_CIPHER_SUITE,
+			      csid, IFLA_MACSEC_PAD) ||
+	    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_DOWN:
+	case NETDEV_UP:
+	case NETDEV_CHANGE: {
+		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) {
+			struct net_device *dev = m->secy.netdev;
+
+			netif_stacked_transfer_operstate(real_dev, dev);
+		}
+		break;
+	}
+	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_common_dellink(m->secy.netdev, &head);
+		}
+
+		netdev_rx_handler_unregister(real_dev);
+		kfree(rxd);
+
+		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(&macsec_fam);
+	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);
+	rcu_barrier();
+}
+
+module_init(macsec_init);
+module_exit(macsec_exit);
+
+MODULE_ALIAS_RTNL_LINK("macsec");
+MODULE_ALIAS_GENL_FAMILY("macsec");
+
+MODULE_DESCRIPTION("MACsec IEEE 802.1AE");
+MODULE_LICENSE("GPL v2");