1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * drivers/net/macsec.c - MACsec device
8 #include <linux/types.h>
9 #include <linux/skbuff.h>
10 #include <linux/socket.h>
11 #include <linux/module.h>
12 #include <crypto/aead.h>
13 #include <linux/etherdevice.h>
14 #include <linux/netdevice.h>
15 #include <linux/rtnetlink.h>
16 #include <linux/refcount.h>
17 #include <net/genetlink.h>
19 #include <net/gro_cells.h>
20 #include <net/macsec.h>
21 #include <net/dst_metadata.h>
22 #include <linux/phy.h>
23 #include <linux/byteorder/generic.h>
24 #include <linux/if_arp.h>
26 #include <uapi/linux/if_macsec.h>
28 /* SecTAG length = macsec_eth_header without the optional SCI */
29 #define MACSEC_TAG_LEN 6
31 struct macsec_eth_header {
35 #if defined(__LITTLE_ENDIAN_BITFIELD)
38 #elif defined(__BIG_ENDIAN_BITFIELD)
42 #error "Please fix <asm/byteorder.h>"
45 u8 secure_channel_id[8]; /* optional */
48 /* minimum secure data length deemed "not short", see IEEE 802.1AE-2006 9.7 */
49 #define MIN_NON_SHORT_LEN 48
51 #define GCM_AES_IV_LEN 12
53 #define for_each_rxsc(secy, sc) \
54 for (sc = rcu_dereference_bh(secy->rx_sc); \
56 sc = rcu_dereference_bh(sc->next))
57 #define for_each_rxsc_rtnl(secy, sc) \
58 for (sc = rtnl_dereference(secy->rx_sc); \
60 sc = rtnl_dereference(sc->next))
62 #define pn_same_half(pn1, pn2) (!(((pn1) >> 31) ^ ((pn2) >> 31)))
66 u8 short_secure_channel_id[4];
74 u8 secure_channel_id[8];
80 #define MACSEC_VALIDATE_DEFAULT MACSEC_VALIDATE_STRICT
82 struct pcpu_secy_stats {
83 struct macsec_dev_stats stats;
84 struct u64_stats_sync syncp;
88 * struct macsec_dev - private data
90 * @real_dev: pointer to underlying netdevice
91 * @dev_tracker: refcount tracker for @real_dev reference
92 * @stats: MACsec device stats
93 * @secys: linked list of SecY's on the underlying device
94 * @gro_cells: pointer to the Generic Receive Offload cell
95 * @offload: status of offloading on the MACsec device
96 * @insert_tx_tag: when offloading, device requires to insert an
100 struct macsec_secy secy;
101 struct net_device *real_dev;
102 netdevice_tracker dev_tracker;
103 struct pcpu_secy_stats __percpu *stats;
104 struct list_head secys;
105 struct gro_cells gro_cells;
106 enum macsec_offload offload;
111 * struct macsec_rxh_data - rx_handler private argument
112 * @secys: linked list of SecY's on this underlying device
114 struct macsec_rxh_data {
115 struct list_head secys;
118 static struct macsec_dev *macsec_priv(const struct net_device *dev)
120 return (struct macsec_dev *)netdev_priv(dev);
123 static struct macsec_rxh_data *macsec_data_rcu(const struct net_device *dev)
125 return rcu_dereference_bh(dev->rx_handler_data);
128 static struct macsec_rxh_data *macsec_data_rtnl(const struct net_device *dev)
130 return rtnl_dereference(dev->rx_handler_data);
134 struct aead_request *req;
136 struct macsec_tx_sa *tx_sa;
137 struct macsec_rx_sa *rx_sa;
144 static struct macsec_rx_sa *macsec_rxsa_get(struct macsec_rx_sa __rcu *ptr)
146 struct macsec_rx_sa *sa = rcu_dereference_bh(ptr);
148 if (!sa || !sa->active)
151 if (!refcount_inc_not_zero(&sa->refcnt))
157 static struct macsec_rx_sa *macsec_active_rxsa_get(struct macsec_rx_sc *rx_sc)
159 struct macsec_rx_sa *sa = NULL;
162 for (an = 0; an < MACSEC_NUM_AN; an++) {
163 sa = macsec_rxsa_get(rx_sc->sa[an]);
170 static void free_rx_sc_rcu(struct rcu_head *head)
172 struct macsec_rx_sc *rx_sc = container_of(head, struct macsec_rx_sc, rcu_head);
174 free_percpu(rx_sc->stats);
178 static struct macsec_rx_sc *macsec_rxsc_get(struct macsec_rx_sc *sc)
180 return refcount_inc_not_zero(&sc->refcnt) ? sc : NULL;
183 static void macsec_rxsc_put(struct macsec_rx_sc *sc)
185 if (refcount_dec_and_test(&sc->refcnt))
186 call_rcu(&sc->rcu_head, free_rx_sc_rcu);
189 static void free_rxsa(struct rcu_head *head)
191 struct macsec_rx_sa *sa = container_of(head, struct macsec_rx_sa, rcu);
193 crypto_free_aead(sa->key.tfm);
194 free_percpu(sa->stats);
198 static void macsec_rxsa_put(struct macsec_rx_sa *sa)
200 if (refcount_dec_and_test(&sa->refcnt))
201 call_rcu(&sa->rcu, free_rxsa);
204 static struct macsec_tx_sa *macsec_txsa_get(struct macsec_tx_sa __rcu *ptr)
206 struct macsec_tx_sa *sa = rcu_dereference_bh(ptr);
208 if (!sa || !sa->active)
211 if (!refcount_inc_not_zero(&sa->refcnt))
217 static void free_txsa(struct rcu_head *head)
219 struct macsec_tx_sa *sa = container_of(head, struct macsec_tx_sa, rcu);
221 crypto_free_aead(sa->key.tfm);
222 free_percpu(sa->stats);
226 static void macsec_txsa_put(struct macsec_tx_sa *sa)
228 if (refcount_dec_and_test(&sa->refcnt))
229 call_rcu(&sa->rcu, free_txsa);
232 static struct macsec_cb *macsec_skb_cb(struct sk_buff *skb)
234 BUILD_BUG_ON(sizeof(struct macsec_cb) > sizeof(skb->cb));
235 return (struct macsec_cb *)skb->cb;
238 #define MACSEC_PORT_SCB (0x0000)
239 #define MACSEC_UNDEF_SCI ((__force sci_t)0xffffffffffffffffULL)
240 #define MACSEC_UNDEF_SSCI ((__force ssci_t)0xffffffff)
242 #define MACSEC_GCM_AES_128_SAK_LEN 16
243 #define MACSEC_GCM_AES_256_SAK_LEN 32
245 #define DEFAULT_SAK_LEN MACSEC_GCM_AES_128_SAK_LEN
246 #define DEFAULT_XPN false
247 #define DEFAULT_SEND_SCI true
248 #define DEFAULT_ENCRYPT false
249 #define DEFAULT_ENCODING_SA 0
250 #define MACSEC_XPN_MAX_REPLAY_WINDOW (((1 << 30) - 1))
252 static sci_t make_sci(const u8 *addr, __be16 port)
256 memcpy(&sci, addr, ETH_ALEN);
257 memcpy(((char *)&sci) + ETH_ALEN, &port, sizeof(port));
262 static sci_t macsec_frame_sci(struct macsec_eth_header *hdr, bool sci_present)
267 memcpy(&sci, hdr->secure_channel_id,
268 sizeof(hdr->secure_channel_id));
270 sci = make_sci(hdr->eth.h_source, MACSEC_PORT_ES);
275 static unsigned int macsec_sectag_len(bool sci_present)
277 return MACSEC_TAG_LEN + (sci_present ? MACSEC_SCI_LEN : 0);
280 static unsigned int macsec_hdr_len(bool sci_present)
282 return macsec_sectag_len(sci_present) + ETH_HLEN;
285 static unsigned int macsec_extra_len(bool sci_present)
287 return macsec_sectag_len(sci_present) + sizeof(__be16);
290 /* Fill SecTAG according to IEEE 802.1AE-2006 10.5.3 */
291 static void macsec_fill_sectag(struct macsec_eth_header *h,
292 const struct macsec_secy *secy, u32 pn,
295 const struct macsec_tx_sc *tx_sc = &secy->tx_sc;
297 memset(&h->tci_an, 0, macsec_sectag_len(sci_present));
298 h->eth.h_proto = htons(ETH_P_MACSEC);
301 h->tci_an |= MACSEC_TCI_SC;
302 memcpy(&h->secure_channel_id, &secy->sci,
303 sizeof(h->secure_channel_id));
305 if (tx_sc->end_station)
306 h->tci_an |= MACSEC_TCI_ES;
308 h->tci_an |= MACSEC_TCI_SCB;
311 h->packet_number = htonl(pn);
313 /* with GCM, C/E clear for !encrypt, both set for encrypt */
315 h->tci_an |= MACSEC_TCI_CONFID;
316 else if (secy->icv_len != MACSEC_DEFAULT_ICV_LEN)
317 h->tci_an |= MACSEC_TCI_C;
319 h->tci_an |= tx_sc->encoding_sa;
322 static void macsec_set_shortlen(struct macsec_eth_header *h, size_t data_len)
324 if (data_len < MIN_NON_SHORT_LEN)
325 h->short_length = data_len;
328 /* Checks if a MACsec interface is being offloaded to an hardware engine */
329 static bool macsec_is_offloaded(struct macsec_dev *macsec)
331 if (macsec->offload == MACSEC_OFFLOAD_MAC ||
332 macsec->offload == MACSEC_OFFLOAD_PHY)
338 /* Checks if underlying layers implement MACsec offloading functions. */
339 static bool macsec_check_offload(enum macsec_offload offload,
340 struct macsec_dev *macsec)
342 if (!macsec || !macsec->real_dev)
345 if (offload == MACSEC_OFFLOAD_PHY)
346 return macsec->real_dev->phydev &&
347 macsec->real_dev->phydev->macsec_ops;
348 else if (offload == MACSEC_OFFLOAD_MAC)
349 return macsec->real_dev->features & NETIF_F_HW_MACSEC &&
350 macsec->real_dev->macsec_ops;
355 static const struct macsec_ops *__macsec_get_ops(enum macsec_offload offload,
356 struct macsec_dev *macsec,
357 struct macsec_context *ctx)
360 memset(ctx, 0, sizeof(*ctx));
361 ctx->offload = offload;
363 if (offload == MACSEC_OFFLOAD_PHY)
364 ctx->phydev = macsec->real_dev->phydev;
365 else if (offload == MACSEC_OFFLOAD_MAC)
366 ctx->netdev = macsec->real_dev;
369 if (offload == MACSEC_OFFLOAD_PHY)
370 return macsec->real_dev->phydev->macsec_ops;
372 return macsec->real_dev->macsec_ops;
375 /* Returns a pointer to the MACsec ops struct if any and updates the MACsec
376 * context device reference if provided.
378 static const struct macsec_ops *macsec_get_ops(struct macsec_dev *macsec,
379 struct macsec_context *ctx)
381 if (!macsec_check_offload(macsec->offload, macsec))
384 return __macsec_get_ops(macsec->offload, macsec, ctx);
387 /* validate MACsec packet according to IEEE 802.1AE-2018 9.12 */
388 static bool macsec_validate_skb(struct sk_buff *skb, u16 icv_len, bool xpn)
390 struct macsec_eth_header *h = (struct macsec_eth_header *)skb->data;
391 int len = skb->len - 2 * ETH_ALEN;
392 int extra_len = macsec_extra_len(!!(h->tci_an & MACSEC_TCI_SC)) + icv_len;
394 /* a) It comprises at least 17 octets */
398 /* b) MACsec EtherType: already checked */
400 /* c) V bit is clear */
401 if (h->tci_an & MACSEC_TCI_VERSION)
404 /* d) ES or SCB => !SC */
405 if ((h->tci_an & MACSEC_TCI_ES || h->tci_an & MACSEC_TCI_SCB) &&
406 (h->tci_an & MACSEC_TCI_SC))
409 /* e) Bits 7 and 8 of octet 4 of the SecTAG are clear */
413 /* rx.pn != 0 if not XPN (figure 10-5 with 802.11AEbw-2013 amendment) */
414 if (!h->packet_number && !xpn)
417 /* length check, f) g) h) i) */
419 return len == extra_len + h->short_length;
420 return len >= extra_len + MIN_NON_SHORT_LEN;
423 #define MACSEC_NEEDED_HEADROOM (macsec_extra_len(true))
424 #define MACSEC_NEEDED_TAILROOM MACSEC_STD_ICV_LEN
426 static void macsec_fill_iv_xpn(unsigned char *iv, ssci_t ssci, u64 pn,
429 struct gcm_iv_xpn *gcm_iv = (struct gcm_iv_xpn *)iv;
431 gcm_iv->ssci = ssci ^ salt.ssci;
432 gcm_iv->pn = cpu_to_be64(pn) ^ salt.pn;
435 static void macsec_fill_iv(unsigned char *iv, sci_t sci, u32 pn)
437 struct gcm_iv *gcm_iv = (struct gcm_iv *)iv;
440 gcm_iv->pn = htonl(pn);
443 static struct macsec_eth_header *macsec_ethhdr(struct sk_buff *skb)
445 return (struct macsec_eth_header *)skb_mac_header(skb);
448 static void __macsec_pn_wrapped(struct macsec_secy *secy,
449 struct macsec_tx_sa *tx_sa)
451 pr_debug("PN wrapped, transitioning to !oper\n");
452 tx_sa->active = false;
453 if (secy->protect_frames)
454 secy->operational = false;
457 void macsec_pn_wrapped(struct macsec_secy *secy, struct macsec_tx_sa *tx_sa)
459 spin_lock_bh(&tx_sa->lock);
460 __macsec_pn_wrapped(secy, tx_sa);
461 spin_unlock_bh(&tx_sa->lock);
463 EXPORT_SYMBOL_GPL(macsec_pn_wrapped);
465 static pn_t tx_sa_update_pn(struct macsec_tx_sa *tx_sa,
466 struct macsec_secy *secy)
470 spin_lock_bh(&tx_sa->lock);
472 pn = tx_sa->next_pn_halves;
476 tx_sa->next_pn_halves.lower++;
478 if (tx_sa->next_pn == 0)
479 __macsec_pn_wrapped(secy, tx_sa);
480 spin_unlock_bh(&tx_sa->lock);
485 static void macsec_encrypt_finish(struct sk_buff *skb, struct net_device *dev)
487 struct macsec_dev *macsec = netdev_priv(dev);
489 skb->dev = macsec->real_dev;
490 skb_reset_mac_header(skb);
491 skb->protocol = eth_hdr(skb)->h_proto;
494 static unsigned int macsec_msdu_len(struct sk_buff *skb)
496 struct macsec_dev *macsec = macsec_priv(skb->dev);
497 struct macsec_secy *secy = &macsec->secy;
498 bool sci_present = macsec_skb_cb(skb)->has_sci;
500 return skb->len - macsec_hdr_len(sci_present) - secy->icv_len;
503 static void macsec_count_tx(struct sk_buff *skb, struct macsec_tx_sc *tx_sc,
504 struct macsec_tx_sa *tx_sa)
506 unsigned int msdu_len = macsec_msdu_len(skb);
507 struct pcpu_tx_sc_stats *txsc_stats = this_cpu_ptr(tx_sc->stats);
509 u64_stats_update_begin(&txsc_stats->syncp);
510 if (tx_sc->encrypt) {
511 txsc_stats->stats.OutOctetsEncrypted += msdu_len;
512 txsc_stats->stats.OutPktsEncrypted++;
513 this_cpu_inc(tx_sa->stats->OutPktsEncrypted);
515 txsc_stats->stats.OutOctetsProtected += msdu_len;
516 txsc_stats->stats.OutPktsProtected++;
517 this_cpu_inc(tx_sa->stats->OutPktsProtected);
519 u64_stats_update_end(&txsc_stats->syncp);
522 static void count_tx(struct net_device *dev, int ret, int len)
524 if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN))
525 dev_sw_netstats_tx_add(dev, 1, len);
528 static void macsec_encrypt_done(void *data, int err)
530 struct sk_buff *skb = data;
531 struct net_device *dev = skb->dev;
532 struct macsec_dev *macsec = macsec_priv(dev);
533 struct macsec_tx_sa *sa = macsec_skb_cb(skb)->tx_sa;
536 aead_request_free(macsec_skb_cb(skb)->req);
539 macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa);
540 /* packet is encrypted/protected so tx_bytes must be calculated */
541 len = macsec_msdu_len(skb) + 2 * ETH_ALEN;
542 macsec_encrypt_finish(skb, dev);
543 ret = dev_queue_xmit(skb);
544 count_tx(dev, ret, len);
545 rcu_read_unlock_bh();
551 static struct aead_request *macsec_alloc_req(struct crypto_aead *tfm,
553 struct scatterlist **sg,
556 size_t size, iv_offset, sg_offset;
557 struct aead_request *req;
560 size = sizeof(struct aead_request) + crypto_aead_reqsize(tfm);
562 size += GCM_AES_IV_LEN;
564 size = ALIGN(size, __alignof__(struct scatterlist));
566 size += sizeof(struct scatterlist) * num_frags;
568 tmp = kmalloc(size, GFP_ATOMIC);
572 *iv = (unsigned char *)(tmp + iv_offset);
573 *sg = (struct scatterlist *)(tmp + sg_offset);
576 aead_request_set_tfm(req, tfm);
581 static struct sk_buff *macsec_encrypt(struct sk_buff *skb,
582 struct net_device *dev)
585 struct scatterlist *sg;
586 struct sk_buff *trailer;
589 struct macsec_eth_header *hh;
590 size_t unprotected_len;
591 struct aead_request *req;
592 struct macsec_secy *secy;
593 struct macsec_tx_sc *tx_sc;
594 struct macsec_tx_sa *tx_sa;
595 struct macsec_dev *macsec = macsec_priv(dev);
599 secy = &macsec->secy;
600 tx_sc = &secy->tx_sc;
602 /* 10.5.1 TX SA assignment */
603 tx_sa = macsec_txsa_get(tx_sc->sa[tx_sc->encoding_sa]);
605 secy->operational = false;
607 return ERR_PTR(-EINVAL);
610 if (unlikely(skb_headroom(skb) < MACSEC_NEEDED_HEADROOM ||
611 skb_tailroom(skb) < MACSEC_NEEDED_TAILROOM)) {
612 struct sk_buff *nskb = skb_copy_expand(skb,
613 MACSEC_NEEDED_HEADROOM,
614 MACSEC_NEEDED_TAILROOM,
620 macsec_txsa_put(tx_sa);
622 return ERR_PTR(-ENOMEM);
625 skb = skb_unshare(skb, GFP_ATOMIC);
627 macsec_txsa_put(tx_sa);
628 return ERR_PTR(-ENOMEM);
632 unprotected_len = skb->len;
634 sci_present = macsec_send_sci(secy);
635 hh = skb_push(skb, macsec_extra_len(sci_present));
636 memmove(hh, eth, 2 * ETH_ALEN);
638 pn = tx_sa_update_pn(tx_sa, secy);
639 if (pn.full64 == 0) {
640 macsec_txsa_put(tx_sa);
642 return ERR_PTR(-ENOLINK);
644 macsec_fill_sectag(hh, secy, pn.lower, sci_present);
645 macsec_set_shortlen(hh, unprotected_len - 2 * ETH_ALEN);
647 skb_put(skb, secy->icv_len);
649 if (skb->len - ETH_HLEN > macsec_priv(dev)->real_dev->mtu) {
650 struct pcpu_secy_stats *secy_stats = this_cpu_ptr(macsec->stats);
652 u64_stats_update_begin(&secy_stats->syncp);
653 secy_stats->stats.OutPktsTooLong++;
654 u64_stats_update_end(&secy_stats->syncp);
656 macsec_txsa_put(tx_sa);
658 return ERR_PTR(-EINVAL);
661 ret = skb_cow_data(skb, 0, &trailer);
662 if (unlikely(ret < 0)) {
663 macsec_txsa_put(tx_sa);
668 req = macsec_alloc_req(tx_sa->key.tfm, &iv, &sg, ret);
670 macsec_txsa_put(tx_sa);
672 return ERR_PTR(-ENOMEM);
676 macsec_fill_iv_xpn(iv, tx_sa->ssci, pn.full64, tx_sa->key.salt);
678 macsec_fill_iv(iv, secy->sci, pn.lower);
680 sg_init_table(sg, ret);
681 ret = skb_to_sgvec(skb, sg, 0, skb->len);
682 if (unlikely(ret < 0)) {
683 aead_request_free(req);
684 macsec_txsa_put(tx_sa);
689 if (tx_sc->encrypt) {
690 int len = skb->len - macsec_hdr_len(sci_present) -
692 aead_request_set_crypt(req, sg, sg, len, iv);
693 aead_request_set_ad(req, macsec_hdr_len(sci_present));
695 aead_request_set_crypt(req, sg, sg, 0, iv);
696 aead_request_set_ad(req, skb->len - secy->icv_len);
699 macsec_skb_cb(skb)->req = req;
700 macsec_skb_cb(skb)->tx_sa = tx_sa;
701 macsec_skb_cb(skb)->has_sci = sci_present;
702 aead_request_set_callback(req, 0, macsec_encrypt_done, skb);
705 ret = crypto_aead_encrypt(req);
706 if (ret == -EINPROGRESS) {
708 } else if (ret != 0) {
711 aead_request_free(req);
712 macsec_txsa_put(tx_sa);
713 return ERR_PTR(-EINVAL);
717 aead_request_free(req);
718 macsec_txsa_put(tx_sa);
723 static bool macsec_post_decrypt(struct sk_buff *skb, struct macsec_secy *secy, u32 pn)
725 struct macsec_rx_sa *rx_sa = macsec_skb_cb(skb)->rx_sa;
726 struct pcpu_rx_sc_stats *rxsc_stats = this_cpu_ptr(rx_sa->sc->stats);
727 struct macsec_eth_header *hdr = macsec_ethhdr(skb);
730 spin_lock(&rx_sa->lock);
731 if (rx_sa->next_pn_halves.lower >= secy->replay_window)
732 lowest_pn = rx_sa->next_pn_halves.lower - secy->replay_window;
734 /* Now perform replay protection check again
735 * (see IEEE 802.1AE-2006 figure 10-5)
737 if (secy->replay_protect && pn < lowest_pn &&
738 (!secy->xpn || pn_same_half(pn, lowest_pn))) {
739 spin_unlock(&rx_sa->lock);
740 u64_stats_update_begin(&rxsc_stats->syncp);
741 rxsc_stats->stats.InPktsLate++;
742 u64_stats_update_end(&rxsc_stats->syncp);
743 DEV_STATS_INC(secy->netdev, rx_dropped);
747 if (secy->validate_frames != MACSEC_VALIDATE_DISABLED) {
748 unsigned int msdu_len = macsec_msdu_len(skb);
749 u64_stats_update_begin(&rxsc_stats->syncp);
750 if (hdr->tci_an & MACSEC_TCI_E)
751 rxsc_stats->stats.InOctetsDecrypted += msdu_len;
753 rxsc_stats->stats.InOctetsValidated += msdu_len;
754 u64_stats_update_end(&rxsc_stats->syncp);
757 if (!macsec_skb_cb(skb)->valid) {
758 spin_unlock(&rx_sa->lock);
761 if (hdr->tci_an & MACSEC_TCI_C ||
762 secy->validate_frames == MACSEC_VALIDATE_STRICT) {
763 u64_stats_update_begin(&rxsc_stats->syncp);
764 rxsc_stats->stats.InPktsNotValid++;
765 u64_stats_update_end(&rxsc_stats->syncp);
766 this_cpu_inc(rx_sa->stats->InPktsNotValid);
767 DEV_STATS_INC(secy->netdev, rx_errors);
771 u64_stats_update_begin(&rxsc_stats->syncp);
772 if (secy->validate_frames == MACSEC_VALIDATE_CHECK) {
773 rxsc_stats->stats.InPktsInvalid++;
774 this_cpu_inc(rx_sa->stats->InPktsInvalid);
775 } else if (pn < lowest_pn) {
776 rxsc_stats->stats.InPktsDelayed++;
778 rxsc_stats->stats.InPktsUnchecked++;
780 u64_stats_update_end(&rxsc_stats->syncp);
782 u64_stats_update_begin(&rxsc_stats->syncp);
783 if (pn < lowest_pn) {
784 rxsc_stats->stats.InPktsDelayed++;
786 rxsc_stats->stats.InPktsOK++;
787 this_cpu_inc(rx_sa->stats->InPktsOK);
789 u64_stats_update_end(&rxsc_stats->syncp);
791 // Instead of "pn >=" - to support pn overflow in xpn
792 if (pn + 1 > rx_sa->next_pn_halves.lower) {
793 rx_sa->next_pn_halves.lower = pn + 1;
794 } else if (secy->xpn &&
795 !pn_same_half(pn, rx_sa->next_pn_halves.lower)) {
796 rx_sa->next_pn_halves.upper++;
797 rx_sa->next_pn_halves.lower = pn + 1;
800 spin_unlock(&rx_sa->lock);
806 static void macsec_reset_skb(struct sk_buff *skb, struct net_device *dev)
808 skb->pkt_type = PACKET_HOST;
809 skb->protocol = eth_type_trans(skb, dev);
811 skb_reset_network_header(skb);
812 if (!skb_transport_header_was_set(skb))
813 skb_reset_transport_header(skb);
814 skb_reset_mac_len(skb);
817 static void macsec_finalize_skb(struct sk_buff *skb, u8 icv_len, u8 hdr_len)
819 skb->ip_summed = CHECKSUM_NONE;
820 memmove(skb->data + hdr_len, skb->data, 2 * ETH_ALEN);
821 skb_pull(skb, hdr_len);
822 pskb_trim_unique(skb, skb->len - icv_len);
825 static void count_rx(struct net_device *dev, int len)
827 dev_sw_netstats_rx_add(dev, len);
830 static void macsec_decrypt_done(void *data, int err)
832 struct sk_buff *skb = data;
833 struct net_device *dev = skb->dev;
834 struct macsec_dev *macsec = macsec_priv(dev);
835 struct macsec_rx_sa *rx_sa = macsec_skb_cb(skb)->rx_sa;
836 struct macsec_rx_sc *rx_sc = rx_sa->sc;
840 aead_request_free(macsec_skb_cb(skb)->req);
843 macsec_skb_cb(skb)->valid = true;
846 pn = ntohl(macsec_ethhdr(skb)->packet_number);
847 if (!macsec_post_decrypt(skb, &macsec->secy, pn)) {
848 rcu_read_unlock_bh();
853 macsec_finalize_skb(skb, macsec->secy.icv_len,
854 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
856 macsec_reset_skb(skb, macsec->secy.netdev);
858 if (gro_cells_receive(&macsec->gro_cells, skb) == NET_RX_SUCCESS)
861 rcu_read_unlock_bh();
864 macsec_rxsa_put(rx_sa);
865 macsec_rxsc_put(rx_sc);
869 static struct sk_buff *macsec_decrypt(struct sk_buff *skb,
870 struct net_device *dev,
871 struct macsec_rx_sa *rx_sa,
873 struct macsec_secy *secy)
876 struct scatterlist *sg;
877 struct sk_buff *trailer;
879 struct aead_request *req;
880 struct macsec_eth_header *hdr;
882 u16 icv_len = secy->icv_len;
884 macsec_skb_cb(skb)->valid = false;
885 skb = skb_share_check(skb, GFP_ATOMIC);
887 return ERR_PTR(-ENOMEM);
889 ret = skb_cow_data(skb, 0, &trailer);
890 if (unlikely(ret < 0)) {
894 req = macsec_alloc_req(rx_sa->key.tfm, &iv, &sg, ret);
897 return ERR_PTR(-ENOMEM);
900 hdr = (struct macsec_eth_header *)skb->data;
901 hdr_pn = ntohl(hdr->packet_number);
904 pn_t recovered_pn = rx_sa->next_pn_halves;
906 recovered_pn.lower = hdr_pn;
907 if (hdr_pn < rx_sa->next_pn_halves.lower &&
908 !pn_same_half(hdr_pn, rx_sa->next_pn_halves.lower))
909 recovered_pn.upper++;
911 macsec_fill_iv_xpn(iv, rx_sa->ssci, recovered_pn.full64,
914 macsec_fill_iv(iv, sci, hdr_pn);
917 sg_init_table(sg, ret);
918 ret = skb_to_sgvec(skb, sg, 0, skb->len);
919 if (unlikely(ret < 0)) {
920 aead_request_free(req);
925 if (hdr->tci_an & MACSEC_TCI_E) {
926 /* confidentiality: ethernet + macsec header
927 * authenticated, encrypted payload
929 int len = skb->len - macsec_hdr_len(macsec_skb_cb(skb)->has_sci);
931 aead_request_set_crypt(req, sg, sg, len, iv);
932 aead_request_set_ad(req, macsec_hdr_len(macsec_skb_cb(skb)->has_sci));
933 skb = skb_unshare(skb, GFP_ATOMIC);
935 aead_request_free(req);
936 return ERR_PTR(-ENOMEM);
939 /* integrity only: all headers + data authenticated */
940 aead_request_set_crypt(req, sg, sg, icv_len, iv);
941 aead_request_set_ad(req, skb->len - icv_len);
944 macsec_skb_cb(skb)->req = req;
946 aead_request_set_callback(req, 0, macsec_decrypt_done, skb);
949 ret = crypto_aead_decrypt(req);
950 if (ret == -EINPROGRESS) {
952 } else if (ret != 0) {
953 /* decryption/authentication failed
954 * 10.6 if validateFrames is disabled, deliver anyway
956 if (ret != -EBADMSG) {
961 macsec_skb_cb(skb)->valid = true;
965 aead_request_free(req);
970 static struct macsec_rx_sc *find_rx_sc(struct macsec_secy *secy, sci_t sci)
972 struct macsec_rx_sc *rx_sc;
974 for_each_rxsc(secy, rx_sc) {
975 if (rx_sc->sci == sci)
982 static struct macsec_rx_sc *find_rx_sc_rtnl(struct macsec_secy *secy, sci_t sci)
984 struct macsec_rx_sc *rx_sc;
986 for_each_rxsc_rtnl(secy, rx_sc) {
987 if (rx_sc->sci == sci)
994 static enum rx_handler_result handle_not_macsec(struct sk_buff *skb)
996 /* Deliver to the uncontrolled port by default */
997 enum rx_handler_result ret = RX_HANDLER_PASS;
998 struct ethhdr *hdr = eth_hdr(skb);
999 struct metadata_dst *md_dst;
1000 struct macsec_rxh_data *rxd;
1001 struct macsec_dev *macsec;
1002 bool is_macsec_md_dst;
1005 rxd = macsec_data_rcu(skb->dev);
1006 md_dst = skb_metadata_dst(skb);
1007 is_macsec_md_dst = md_dst && md_dst->type == METADATA_MACSEC;
1009 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1010 struct sk_buff *nskb;
1011 struct pcpu_secy_stats *secy_stats = this_cpu_ptr(macsec->stats);
1012 struct net_device *ndev = macsec->secy.netdev;
1014 /* If h/w offloading is enabled, HW decodes frames and strips
1015 * the SecTAG, so we have to deduce which port to deliver to.
1017 if (macsec_is_offloaded(macsec) && netif_running(ndev)) {
1018 const struct macsec_ops *ops;
1020 ops = macsec_get_ops(macsec, NULL);
1022 if (ops->rx_uses_md_dst && !is_macsec_md_dst)
1025 if (is_macsec_md_dst) {
1026 struct macsec_rx_sc *rx_sc;
1028 /* All drivers that implement MACsec offload
1029 * support using skb metadata destinations must
1030 * indicate that they do so.
1032 DEBUG_NET_WARN_ON_ONCE(!ops->rx_uses_md_dst);
1033 rx_sc = find_rx_sc(&macsec->secy,
1034 md_dst->u.macsec_info.sci);
1037 /* device indicated macsec offload occurred */
1039 skb->pkt_type = PACKET_HOST;
1040 eth_skb_pkt_type(skb, ndev);
1041 ret = RX_HANDLER_ANOTHER;
1045 /* This datapath is insecure because it is unable to
1046 * enforce isolation of broadcast/multicast traffic and
1047 * unicast traffic with promiscuous mode on the macsec
1048 * netdev. Since the core stack has no mechanism to
1049 * check that the hardware did indeed receive MACsec
1050 * traffic, it is possible that the response handling
1051 * done by the MACsec port was to a plaintext packet.
1052 * This violates the MACsec protocol standard.
1054 if (ether_addr_equal_64bits(hdr->h_dest,
1056 /* exact match, divert skb to this port */
1058 skb->pkt_type = PACKET_HOST;
1059 ret = RX_HANDLER_ANOTHER;
1061 } else if (is_multicast_ether_addr_64bits(
1063 /* multicast frame, deliver on this port too */
1064 nskb = skb_clone(skb, GFP_ATOMIC);
1069 eth_skb_pkt_type(nskb, ndev);
1072 } else if (ndev->flags & IFF_PROMISC) {
1074 skb->pkt_type = PACKET_HOST;
1075 ret = RX_HANDLER_ANOTHER;
1082 /* 10.6 If the management control validateFrames is not
1083 * Strict, frames without a SecTAG are received, counted, and
1084 * delivered to the Controlled Port
1086 if (macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) {
1087 u64_stats_update_begin(&secy_stats->syncp);
1088 secy_stats->stats.InPktsNoTag++;
1089 u64_stats_update_end(&secy_stats->syncp);
1090 DEV_STATS_INC(macsec->secy.netdev, rx_dropped);
1094 /* deliver on this port */
1095 nskb = skb_clone(skb, GFP_ATOMIC);
1101 if (__netif_rx(nskb) == NET_RX_SUCCESS) {
1102 u64_stats_update_begin(&secy_stats->syncp);
1103 secy_stats->stats.InPktsUntagged++;
1104 u64_stats_update_end(&secy_stats->syncp);
1113 static rx_handler_result_t macsec_handle_frame(struct sk_buff **pskb)
1115 struct sk_buff *skb = *pskb;
1116 struct net_device *dev = skb->dev;
1117 struct macsec_eth_header *hdr;
1118 struct macsec_secy *secy = NULL;
1119 struct macsec_rx_sc *rx_sc;
1120 struct macsec_rx_sa *rx_sa;
1121 struct macsec_rxh_data *rxd;
1122 struct macsec_dev *macsec;
1127 struct pcpu_rx_sc_stats *rxsc_stats;
1128 struct pcpu_secy_stats *secy_stats;
1132 if (skb_headroom(skb) < ETH_HLEN)
1135 hdr = macsec_ethhdr(skb);
1136 if (hdr->eth.h_proto != htons(ETH_P_MACSEC))
1137 return handle_not_macsec(skb);
1139 skb = skb_unshare(skb, GFP_ATOMIC);
1142 return RX_HANDLER_CONSUMED;
1144 pulled_sci = pskb_may_pull(skb, macsec_extra_len(true));
1146 if (!pskb_may_pull(skb, macsec_extra_len(false)))
1150 hdr = macsec_ethhdr(skb);
1152 /* Frames with a SecTAG that has the TCI E bit set but the C
1153 * bit clear are discarded, as this reserved encoding is used
1154 * to identify frames with a SecTAG that are not to be
1155 * delivered to the Controlled Port.
1157 if ((hdr->tci_an & (MACSEC_TCI_C | MACSEC_TCI_E)) == MACSEC_TCI_E)
1158 return RX_HANDLER_PASS;
1160 /* now, pull the extra length */
1161 if (hdr->tci_an & MACSEC_TCI_SC) {
1166 /* ethernet header is part of crypto processing */
1167 skb_push(skb, ETH_HLEN);
1169 macsec_skb_cb(skb)->has_sci = !!(hdr->tci_an & MACSEC_TCI_SC);
1170 macsec_skb_cb(skb)->assoc_num = hdr->tci_an & MACSEC_AN_MASK;
1171 sci = macsec_frame_sci(hdr, macsec_skb_cb(skb)->has_sci);
1174 rxd = macsec_data_rcu(skb->dev);
1176 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1177 struct macsec_rx_sc *sc = find_rx_sc(&macsec->secy, sci);
1179 sc = sc ? macsec_rxsc_get(sc) : NULL;
1182 secy = &macsec->secy;
1192 macsec = macsec_priv(dev);
1193 secy_stats = this_cpu_ptr(macsec->stats);
1194 rxsc_stats = this_cpu_ptr(rx_sc->stats);
1196 if (!macsec_validate_skb(skb, secy->icv_len, secy->xpn)) {
1197 u64_stats_update_begin(&secy_stats->syncp);
1198 secy_stats->stats.InPktsBadTag++;
1199 u64_stats_update_end(&secy_stats->syncp);
1200 DEV_STATS_INC(secy->netdev, rx_errors);
1204 rx_sa = macsec_rxsa_get(rx_sc->sa[macsec_skb_cb(skb)->assoc_num]);
1206 /* 10.6.1 if the SA is not in use */
1208 /* If validateFrames is Strict or the C bit in the
1209 * SecTAG is set, discard
1211 struct macsec_rx_sa *active_rx_sa = macsec_active_rxsa_get(rx_sc);
1212 if (hdr->tci_an & MACSEC_TCI_C ||
1213 secy->validate_frames == MACSEC_VALIDATE_STRICT) {
1214 u64_stats_update_begin(&rxsc_stats->syncp);
1215 rxsc_stats->stats.InPktsNotUsingSA++;
1216 u64_stats_update_end(&rxsc_stats->syncp);
1217 DEV_STATS_INC(secy->netdev, rx_errors);
1219 this_cpu_inc(active_rx_sa->stats->InPktsNotUsingSA);
1223 /* not Strict, the frame (with the SecTAG and ICV
1224 * removed) is delivered to the Controlled Port.
1226 u64_stats_update_begin(&rxsc_stats->syncp);
1227 rxsc_stats->stats.InPktsUnusedSA++;
1228 u64_stats_update_end(&rxsc_stats->syncp);
1230 this_cpu_inc(active_rx_sa->stats->InPktsUnusedSA);
1234 /* First, PN check to avoid decrypting obviously wrong packets */
1235 hdr_pn = ntohl(hdr->packet_number);
1236 if (secy->replay_protect) {
1239 spin_lock(&rx_sa->lock);
1240 late = rx_sa->next_pn_halves.lower >= secy->replay_window &&
1241 hdr_pn < (rx_sa->next_pn_halves.lower - secy->replay_window);
1244 late = late && pn_same_half(rx_sa->next_pn_halves.lower, hdr_pn);
1245 spin_unlock(&rx_sa->lock);
1248 u64_stats_update_begin(&rxsc_stats->syncp);
1249 rxsc_stats->stats.InPktsLate++;
1250 u64_stats_update_end(&rxsc_stats->syncp);
1251 DEV_STATS_INC(macsec->secy.netdev, rx_dropped);
1256 macsec_skb_cb(skb)->rx_sa = rx_sa;
1258 /* Disabled && !changed text => skip validation */
1259 if (hdr->tci_an & MACSEC_TCI_C ||
1260 secy->validate_frames != MACSEC_VALIDATE_DISABLED)
1261 skb = macsec_decrypt(skb, dev, rx_sa, sci, secy);
1264 /* the decrypt callback needs the reference */
1265 if (PTR_ERR(skb) != -EINPROGRESS) {
1266 macsec_rxsa_put(rx_sa);
1267 macsec_rxsc_put(rx_sc);
1271 return RX_HANDLER_CONSUMED;
1274 if (!macsec_post_decrypt(skb, secy, hdr_pn))
1278 macsec_finalize_skb(skb, secy->icv_len,
1279 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
1281 macsec_reset_skb(skb, secy->netdev);
1284 macsec_rxsa_put(rx_sa);
1285 macsec_rxsc_put(rx_sc);
1288 ret = gro_cells_receive(&macsec->gro_cells, skb);
1289 if (ret == NET_RX_SUCCESS)
1292 DEV_STATS_INC(macsec->secy.netdev, rx_dropped);
1297 return RX_HANDLER_CONSUMED;
1300 macsec_rxsa_put(rx_sa);
1302 macsec_rxsc_put(rx_sc);
1307 return RX_HANDLER_CONSUMED;
1310 /* 10.6.1 if the SC is not found */
1311 cbit = !!(hdr->tci_an & MACSEC_TCI_C);
1313 macsec_finalize_skb(skb, MACSEC_DEFAULT_ICV_LEN,
1314 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
1316 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1317 struct sk_buff *nskb;
1319 secy_stats = this_cpu_ptr(macsec->stats);
1321 /* If validateFrames is Strict or the C bit in the
1322 * SecTAG is set, discard
1325 macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) {
1326 u64_stats_update_begin(&secy_stats->syncp);
1327 secy_stats->stats.InPktsNoSCI++;
1328 u64_stats_update_end(&secy_stats->syncp);
1329 DEV_STATS_INC(macsec->secy.netdev, rx_errors);
1333 /* not strict, the frame (with the SecTAG and ICV
1334 * removed) is delivered to the Controlled Port.
1336 nskb = skb_clone(skb, GFP_ATOMIC);
1340 macsec_reset_skb(nskb, macsec->secy.netdev);
1342 ret = __netif_rx(nskb);
1343 if (ret == NET_RX_SUCCESS) {
1344 u64_stats_update_begin(&secy_stats->syncp);
1345 secy_stats->stats.InPktsUnknownSCI++;
1346 u64_stats_update_end(&secy_stats->syncp);
1348 DEV_STATS_INC(macsec->secy.netdev, rx_dropped);
1354 return RX_HANDLER_PASS;
1357 static struct crypto_aead *macsec_alloc_tfm(char *key, int key_len, int icv_len)
1359 struct crypto_aead *tfm;
1362 tfm = crypto_alloc_aead("gcm(aes)", 0, 0);
1367 ret = crypto_aead_setkey(tfm, key, key_len);
1371 ret = crypto_aead_setauthsize(tfm, icv_len);
1377 crypto_free_aead(tfm);
1378 return ERR_PTR(ret);
1381 static int init_rx_sa(struct macsec_rx_sa *rx_sa, char *sak, int key_len,
1384 rx_sa->stats = alloc_percpu(struct macsec_rx_sa_stats);
1388 rx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len);
1389 if (IS_ERR(rx_sa->key.tfm)) {
1390 free_percpu(rx_sa->stats);
1391 return PTR_ERR(rx_sa->key.tfm);
1394 rx_sa->ssci = MACSEC_UNDEF_SSCI;
1395 rx_sa->active = false;
1397 refcount_set(&rx_sa->refcnt, 1);
1398 spin_lock_init(&rx_sa->lock);
1403 static void clear_rx_sa(struct macsec_rx_sa *rx_sa)
1405 rx_sa->active = false;
1407 macsec_rxsa_put(rx_sa);
1410 static void free_rx_sc(struct macsec_rx_sc *rx_sc)
1414 for (i = 0; i < MACSEC_NUM_AN; i++) {
1415 struct macsec_rx_sa *sa = rtnl_dereference(rx_sc->sa[i]);
1417 RCU_INIT_POINTER(rx_sc->sa[i], NULL);
1422 macsec_rxsc_put(rx_sc);
1425 static struct macsec_rx_sc *del_rx_sc(struct macsec_secy *secy, sci_t sci)
1427 struct macsec_rx_sc *rx_sc, __rcu **rx_scp;
1429 for (rx_scp = &secy->rx_sc, rx_sc = rtnl_dereference(*rx_scp);
1431 rx_scp = &rx_sc->next, rx_sc = rtnl_dereference(*rx_scp)) {
1432 if (rx_sc->sci == sci) {
1435 rcu_assign_pointer(*rx_scp, rx_sc->next);
1443 static struct macsec_rx_sc *create_rx_sc(struct net_device *dev, sci_t sci,
1446 struct macsec_rx_sc *rx_sc;
1447 struct macsec_dev *macsec;
1448 struct net_device *real_dev = macsec_priv(dev)->real_dev;
1449 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
1450 struct macsec_secy *secy;
1452 list_for_each_entry(macsec, &rxd->secys, secys) {
1453 if (find_rx_sc_rtnl(&macsec->secy, sci))
1454 return ERR_PTR(-EEXIST);
1457 rx_sc = kzalloc(sizeof(*rx_sc), GFP_KERNEL);
1459 return ERR_PTR(-ENOMEM);
1461 rx_sc->stats = netdev_alloc_pcpu_stats(struct pcpu_rx_sc_stats);
1462 if (!rx_sc->stats) {
1464 return ERR_PTR(-ENOMEM);
1468 rx_sc->active = active;
1469 refcount_set(&rx_sc->refcnt, 1);
1471 secy = &macsec_priv(dev)->secy;
1472 rcu_assign_pointer(rx_sc->next, secy->rx_sc);
1473 rcu_assign_pointer(secy->rx_sc, rx_sc);
1481 static int init_tx_sa(struct macsec_tx_sa *tx_sa, char *sak, int key_len,
1484 tx_sa->stats = alloc_percpu(struct macsec_tx_sa_stats);
1488 tx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len);
1489 if (IS_ERR(tx_sa->key.tfm)) {
1490 free_percpu(tx_sa->stats);
1491 return PTR_ERR(tx_sa->key.tfm);
1494 tx_sa->ssci = MACSEC_UNDEF_SSCI;
1495 tx_sa->active = false;
1496 refcount_set(&tx_sa->refcnt, 1);
1497 spin_lock_init(&tx_sa->lock);
1502 static void clear_tx_sa(struct macsec_tx_sa *tx_sa)
1504 tx_sa->active = false;
1506 macsec_txsa_put(tx_sa);
1509 static struct genl_family macsec_fam;
1511 static struct net_device *get_dev_from_nl(struct net *net,
1512 struct nlattr **attrs)
1514 int ifindex = nla_get_u32(attrs[MACSEC_ATTR_IFINDEX]);
1515 struct net_device *dev;
1517 dev = __dev_get_by_index(net, ifindex);
1519 return ERR_PTR(-ENODEV);
1521 if (!netif_is_macsec(dev))
1522 return ERR_PTR(-ENODEV);
1527 static enum macsec_offload nla_get_offload(const struct nlattr *nla)
1529 return (__force enum macsec_offload)nla_get_u8(nla);
1532 static sci_t nla_get_sci(const struct nlattr *nla)
1534 return (__force sci_t)nla_get_u64(nla);
1537 static int nla_put_sci(struct sk_buff *skb, int attrtype, sci_t value,
1540 return nla_put_u64_64bit(skb, attrtype, (__force u64)value, padattr);
1543 static ssci_t nla_get_ssci(const struct nlattr *nla)
1545 return (__force ssci_t)nla_get_u32(nla);
1548 static int nla_put_ssci(struct sk_buff *skb, int attrtype, ssci_t value)
1550 return nla_put_u32(skb, attrtype, (__force u64)value);
1553 static struct macsec_tx_sa *get_txsa_from_nl(struct net *net,
1554 struct nlattr **attrs,
1555 struct nlattr **tb_sa,
1556 struct net_device **devp,
1557 struct macsec_secy **secyp,
1558 struct macsec_tx_sc **scp,
1561 struct net_device *dev;
1562 struct macsec_secy *secy;
1563 struct macsec_tx_sc *tx_sc;
1564 struct macsec_tx_sa *tx_sa;
1566 if (!tb_sa[MACSEC_SA_ATTR_AN])
1567 return ERR_PTR(-EINVAL);
1569 *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1571 dev = get_dev_from_nl(net, attrs);
1573 return ERR_CAST(dev);
1575 if (*assoc_num >= MACSEC_NUM_AN)
1576 return ERR_PTR(-EINVAL);
1578 secy = &macsec_priv(dev)->secy;
1579 tx_sc = &secy->tx_sc;
1581 tx_sa = rtnl_dereference(tx_sc->sa[*assoc_num]);
1583 return ERR_PTR(-ENODEV);
1591 static struct macsec_rx_sc *get_rxsc_from_nl(struct net *net,
1592 struct nlattr **attrs,
1593 struct nlattr **tb_rxsc,
1594 struct net_device **devp,
1595 struct macsec_secy **secyp)
1597 struct net_device *dev;
1598 struct macsec_secy *secy;
1599 struct macsec_rx_sc *rx_sc;
1602 dev = get_dev_from_nl(net, attrs);
1604 return ERR_CAST(dev);
1606 secy = &macsec_priv(dev)->secy;
1608 if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI])
1609 return ERR_PTR(-EINVAL);
1611 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1612 rx_sc = find_rx_sc_rtnl(secy, sci);
1614 return ERR_PTR(-ENODEV);
1622 static struct macsec_rx_sa *get_rxsa_from_nl(struct net *net,
1623 struct nlattr **attrs,
1624 struct nlattr **tb_rxsc,
1625 struct nlattr **tb_sa,
1626 struct net_device **devp,
1627 struct macsec_secy **secyp,
1628 struct macsec_rx_sc **scp,
1631 struct macsec_rx_sc *rx_sc;
1632 struct macsec_rx_sa *rx_sa;
1634 if (!tb_sa[MACSEC_SA_ATTR_AN])
1635 return ERR_PTR(-EINVAL);
1637 *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1638 if (*assoc_num >= MACSEC_NUM_AN)
1639 return ERR_PTR(-EINVAL);
1641 rx_sc = get_rxsc_from_nl(net, attrs, tb_rxsc, devp, secyp);
1643 return ERR_CAST(rx_sc);
1645 rx_sa = rtnl_dereference(rx_sc->sa[*assoc_num]);
1647 return ERR_PTR(-ENODEV);
1653 static const struct nla_policy macsec_genl_policy[NUM_MACSEC_ATTR] = {
1654 [MACSEC_ATTR_IFINDEX] = { .type = NLA_U32 },
1655 [MACSEC_ATTR_RXSC_CONFIG] = { .type = NLA_NESTED },
1656 [MACSEC_ATTR_SA_CONFIG] = { .type = NLA_NESTED },
1657 [MACSEC_ATTR_OFFLOAD] = { .type = NLA_NESTED },
1660 static const struct nla_policy macsec_genl_rxsc_policy[NUM_MACSEC_RXSC_ATTR] = {
1661 [MACSEC_RXSC_ATTR_SCI] = { .type = NLA_U64 },
1662 [MACSEC_RXSC_ATTR_ACTIVE] = { .type = NLA_U8 },
1665 static const struct nla_policy macsec_genl_sa_policy[NUM_MACSEC_SA_ATTR] = {
1666 [MACSEC_SA_ATTR_AN] = { .type = NLA_U8 },
1667 [MACSEC_SA_ATTR_ACTIVE] = { .type = NLA_U8 },
1668 [MACSEC_SA_ATTR_PN] = NLA_POLICY_MIN_LEN(4),
1669 [MACSEC_SA_ATTR_KEYID] = { .type = NLA_BINARY,
1670 .len = MACSEC_KEYID_LEN, },
1671 [MACSEC_SA_ATTR_KEY] = { .type = NLA_BINARY,
1672 .len = MACSEC_MAX_KEY_LEN, },
1673 [MACSEC_SA_ATTR_SSCI] = { .type = NLA_U32 },
1674 [MACSEC_SA_ATTR_SALT] = { .type = NLA_BINARY,
1675 .len = MACSEC_SALT_LEN, },
1678 static const struct nla_policy macsec_genl_offload_policy[NUM_MACSEC_OFFLOAD_ATTR] = {
1679 [MACSEC_OFFLOAD_ATTR_TYPE] = { .type = NLA_U8 },
1682 /* Offloads an operation to a device driver */
1683 static int macsec_offload(int (* const func)(struct macsec_context *),
1684 struct macsec_context *ctx)
1688 if (unlikely(!func))
1691 if (ctx->offload == MACSEC_OFFLOAD_PHY)
1692 mutex_lock(&ctx->phydev->lock);
1696 if (ctx->offload == MACSEC_OFFLOAD_PHY)
1697 mutex_unlock(&ctx->phydev->lock);
1702 static int parse_sa_config(struct nlattr **attrs, struct nlattr **tb_sa)
1704 if (!attrs[MACSEC_ATTR_SA_CONFIG])
1707 if (nla_parse_nested_deprecated(tb_sa, MACSEC_SA_ATTR_MAX, attrs[MACSEC_ATTR_SA_CONFIG], macsec_genl_sa_policy, NULL))
1713 static int parse_rxsc_config(struct nlattr **attrs, struct nlattr **tb_rxsc)
1715 if (!attrs[MACSEC_ATTR_RXSC_CONFIG])
1718 if (nla_parse_nested_deprecated(tb_rxsc, MACSEC_RXSC_ATTR_MAX, attrs[MACSEC_ATTR_RXSC_CONFIG], macsec_genl_rxsc_policy, NULL))
1724 static bool validate_add_rxsa(struct nlattr **attrs)
1726 if (!attrs[MACSEC_SA_ATTR_AN] ||
1727 !attrs[MACSEC_SA_ATTR_KEY] ||
1728 !attrs[MACSEC_SA_ATTR_KEYID])
1731 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
1734 if (attrs[MACSEC_SA_ATTR_PN] &&
1735 nla_get_u64(attrs[MACSEC_SA_ATTR_PN]) == 0)
1738 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
1739 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
1743 if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN)
1749 static int macsec_add_rxsa(struct sk_buff *skb, struct genl_info *info)
1751 struct net_device *dev;
1752 struct nlattr **attrs = info->attrs;
1753 struct macsec_secy *secy;
1754 struct macsec_rx_sc *rx_sc;
1755 struct macsec_rx_sa *rx_sa;
1756 unsigned char assoc_num;
1758 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1759 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1762 if (!attrs[MACSEC_ATTR_IFINDEX])
1765 if (parse_sa_config(attrs, tb_sa))
1768 if (parse_rxsc_config(attrs, tb_rxsc))
1771 if (!validate_add_rxsa(tb_sa))
1775 rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy);
1776 if (IS_ERR(rx_sc)) {
1778 return PTR_ERR(rx_sc);
1781 assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1783 if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) {
1784 pr_notice("macsec: nl: add_rxsa: bad key length: %d != %d\n",
1785 nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len);
1790 pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
1791 if (tb_sa[MACSEC_SA_ATTR_PN] &&
1792 nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
1793 pr_notice("macsec: nl: add_rxsa: bad pn length: %d != %d\n",
1794 nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
1800 if (!tb_sa[MACSEC_SA_ATTR_SSCI] || !tb_sa[MACSEC_SA_ATTR_SALT]) {
1805 if (nla_len(tb_sa[MACSEC_SA_ATTR_SALT]) != MACSEC_SALT_LEN) {
1806 pr_notice("macsec: nl: add_rxsa: bad salt length: %d != %d\n",
1807 nla_len(tb_sa[MACSEC_SA_ATTR_SALT]),
1814 rx_sa = rtnl_dereference(rx_sc->sa[assoc_num]);
1820 rx_sa = kmalloc(sizeof(*rx_sa), GFP_KERNEL);
1826 err = init_rx_sa(rx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
1827 secy->key_len, secy->icv_len);
1834 if (tb_sa[MACSEC_SA_ATTR_PN]) {
1835 spin_lock_bh(&rx_sa->lock);
1836 rx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
1837 spin_unlock_bh(&rx_sa->lock);
1840 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
1841 rx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
1846 rx_sa->ssci = nla_get_ssci(tb_sa[MACSEC_SA_ATTR_SSCI]);
1847 nla_memcpy(rx_sa->key.salt.bytes, tb_sa[MACSEC_SA_ATTR_SALT],
1851 /* If h/w offloading is available, propagate to the device */
1852 if (macsec_is_offloaded(netdev_priv(dev))) {
1853 const struct macsec_ops *ops;
1854 struct macsec_context ctx;
1856 ops = macsec_get_ops(netdev_priv(dev), &ctx);
1862 ctx.sa.assoc_num = assoc_num;
1863 ctx.sa.rx_sa = rx_sa;
1865 memcpy(ctx.sa.key, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
1868 err = macsec_offload(ops->mdo_add_rxsa, &ctx);
1869 memzero_explicit(ctx.sa.key, secy->key_len);
1874 nla_memcpy(rx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN);
1875 rcu_assign_pointer(rx_sc->sa[assoc_num], rx_sa);
1882 macsec_rxsa_put(rx_sa);
1887 static bool validate_add_rxsc(struct nlattr **attrs)
1889 if (!attrs[MACSEC_RXSC_ATTR_SCI])
1892 if (attrs[MACSEC_RXSC_ATTR_ACTIVE]) {
1893 if (nla_get_u8(attrs[MACSEC_RXSC_ATTR_ACTIVE]) > 1)
1900 static int macsec_add_rxsc(struct sk_buff *skb, struct genl_info *info)
1902 struct net_device *dev;
1903 sci_t sci = MACSEC_UNDEF_SCI;
1904 struct nlattr **attrs = info->attrs;
1905 struct macsec_rx_sc *rx_sc;
1906 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1907 struct macsec_secy *secy;
1911 if (!attrs[MACSEC_ATTR_IFINDEX])
1914 if (parse_rxsc_config(attrs, tb_rxsc))
1917 if (!validate_add_rxsc(tb_rxsc))
1921 dev = get_dev_from_nl(genl_info_net(info), attrs);
1924 return PTR_ERR(dev);
1927 secy = &macsec_priv(dev)->secy;
1928 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1930 if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE])
1931 active = nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]);
1933 rx_sc = create_rx_sc(dev, sci, active);
1934 if (IS_ERR(rx_sc)) {
1936 return PTR_ERR(rx_sc);
1939 if (macsec_is_offloaded(netdev_priv(dev))) {
1940 const struct macsec_ops *ops;
1941 struct macsec_context ctx;
1943 ops = macsec_get_ops(netdev_priv(dev), &ctx);
1952 ret = macsec_offload(ops->mdo_add_rxsc, &ctx);
1962 del_rx_sc(secy, sci);
1968 static bool validate_add_txsa(struct nlattr **attrs)
1970 if (!attrs[MACSEC_SA_ATTR_AN] ||
1971 !attrs[MACSEC_SA_ATTR_PN] ||
1972 !attrs[MACSEC_SA_ATTR_KEY] ||
1973 !attrs[MACSEC_SA_ATTR_KEYID])
1976 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
1979 if (nla_get_u64(attrs[MACSEC_SA_ATTR_PN]) == 0)
1982 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
1983 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
1987 if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN)
1993 static int macsec_add_txsa(struct sk_buff *skb, struct genl_info *info)
1995 struct net_device *dev;
1996 struct nlattr **attrs = info->attrs;
1997 struct macsec_secy *secy;
1998 struct macsec_tx_sc *tx_sc;
1999 struct macsec_tx_sa *tx_sa;
2000 unsigned char assoc_num;
2002 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2003 bool was_operational;
2006 if (!attrs[MACSEC_ATTR_IFINDEX])
2009 if (parse_sa_config(attrs, tb_sa))
2012 if (!validate_add_txsa(tb_sa))
2016 dev = get_dev_from_nl(genl_info_net(info), attrs);
2019 return PTR_ERR(dev);
2022 secy = &macsec_priv(dev)->secy;
2023 tx_sc = &secy->tx_sc;
2025 assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
2027 if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) {
2028 pr_notice("macsec: nl: add_txsa: bad key length: %d != %d\n",
2029 nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len);
2034 pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
2035 if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
2036 pr_notice("macsec: nl: add_txsa: bad pn length: %d != %d\n",
2037 nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
2043 if (!tb_sa[MACSEC_SA_ATTR_SSCI] || !tb_sa[MACSEC_SA_ATTR_SALT]) {
2048 if (nla_len(tb_sa[MACSEC_SA_ATTR_SALT]) != MACSEC_SALT_LEN) {
2049 pr_notice("macsec: nl: add_txsa: bad salt length: %d != %d\n",
2050 nla_len(tb_sa[MACSEC_SA_ATTR_SALT]),
2057 tx_sa = rtnl_dereference(tx_sc->sa[assoc_num]);
2063 tx_sa = kmalloc(sizeof(*tx_sa), GFP_KERNEL);
2069 err = init_tx_sa(tx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
2070 secy->key_len, secy->icv_len);
2077 spin_lock_bh(&tx_sa->lock);
2078 tx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
2079 spin_unlock_bh(&tx_sa->lock);
2081 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2082 tx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2084 was_operational = secy->operational;
2085 if (assoc_num == tx_sc->encoding_sa && tx_sa->active)
2086 secy->operational = true;
2089 tx_sa->ssci = nla_get_ssci(tb_sa[MACSEC_SA_ATTR_SSCI]);
2090 nla_memcpy(tx_sa->key.salt.bytes, tb_sa[MACSEC_SA_ATTR_SALT],
2094 /* If h/w offloading is available, propagate to the device */
2095 if (macsec_is_offloaded(netdev_priv(dev))) {
2096 const struct macsec_ops *ops;
2097 struct macsec_context ctx;
2099 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2105 ctx.sa.assoc_num = assoc_num;
2106 ctx.sa.tx_sa = tx_sa;
2108 memcpy(ctx.sa.key, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
2111 err = macsec_offload(ops->mdo_add_txsa, &ctx);
2112 memzero_explicit(ctx.sa.key, secy->key_len);
2117 nla_memcpy(tx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN);
2118 rcu_assign_pointer(tx_sc->sa[assoc_num], tx_sa);
2125 secy->operational = was_operational;
2126 macsec_txsa_put(tx_sa);
2131 static int macsec_del_rxsa(struct sk_buff *skb, struct genl_info *info)
2133 struct nlattr **attrs = info->attrs;
2134 struct net_device *dev;
2135 struct macsec_secy *secy;
2136 struct macsec_rx_sc *rx_sc;
2137 struct macsec_rx_sa *rx_sa;
2139 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2140 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2143 if (!attrs[MACSEC_ATTR_IFINDEX])
2146 if (parse_sa_config(attrs, tb_sa))
2149 if (parse_rxsc_config(attrs, tb_rxsc))
2153 rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa,
2154 &dev, &secy, &rx_sc, &assoc_num);
2155 if (IS_ERR(rx_sa)) {
2157 return PTR_ERR(rx_sa);
2160 if (rx_sa->active) {
2165 /* If h/w offloading is available, propagate to the device */
2166 if (macsec_is_offloaded(netdev_priv(dev))) {
2167 const struct macsec_ops *ops;
2168 struct macsec_context ctx;
2170 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2176 ctx.sa.assoc_num = assoc_num;
2177 ctx.sa.rx_sa = rx_sa;
2180 ret = macsec_offload(ops->mdo_del_rxsa, &ctx);
2185 RCU_INIT_POINTER(rx_sc->sa[assoc_num], NULL);
2197 static int macsec_del_rxsc(struct sk_buff *skb, struct genl_info *info)
2199 struct nlattr **attrs = info->attrs;
2200 struct net_device *dev;
2201 struct macsec_secy *secy;
2202 struct macsec_rx_sc *rx_sc;
2204 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2207 if (!attrs[MACSEC_ATTR_IFINDEX])
2210 if (parse_rxsc_config(attrs, tb_rxsc))
2213 if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI])
2217 dev = get_dev_from_nl(genl_info_net(info), info->attrs);
2220 return PTR_ERR(dev);
2223 secy = &macsec_priv(dev)->secy;
2224 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
2226 rx_sc = del_rx_sc(secy, sci);
2232 /* If h/w offloading is available, propagate to the device */
2233 if (macsec_is_offloaded(netdev_priv(dev))) {
2234 const struct macsec_ops *ops;
2235 struct macsec_context ctx;
2237 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2245 ret = macsec_offload(ops->mdo_del_rxsc, &ctx);
2260 static int macsec_del_txsa(struct sk_buff *skb, struct genl_info *info)
2262 struct nlattr **attrs = info->attrs;
2263 struct net_device *dev;
2264 struct macsec_secy *secy;
2265 struct macsec_tx_sc *tx_sc;
2266 struct macsec_tx_sa *tx_sa;
2268 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2271 if (!attrs[MACSEC_ATTR_IFINDEX])
2274 if (parse_sa_config(attrs, tb_sa))
2278 tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa,
2279 &dev, &secy, &tx_sc, &assoc_num);
2280 if (IS_ERR(tx_sa)) {
2282 return PTR_ERR(tx_sa);
2285 if (tx_sa->active) {
2290 /* If h/w offloading is available, propagate to the device */
2291 if (macsec_is_offloaded(netdev_priv(dev))) {
2292 const struct macsec_ops *ops;
2293 struct macsec_context ctx;
2295 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2301 ctx.sa.assoc_num = assoc_num;
2302 ctx.sa.tx_sa = tx_sa;
2305 ret = macsec_offload(ops->mdo_del_txsa, &ctx);
2310 RCU_INIT_POINTER(tx_sc->sa[assoc_num], NULL);
2322 static bool validate_upd_sa(struct nlattr **attrs)
2324 if (!attrs[MACSEC_SA_ATTR_AN] ||
2325 attrs[MACSEC_SA_ATTR_KEY] ||
2326 attrs[MACSEC_SA_ATTR_KEYID] ||
2327 attrs[MACSEC_SA_ATTR_SSCI] ||
2328 attrs[MACSEC_SA_ATTR_SALT])
2331 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
2334 if (attrs[MACSEC_SA_ATTR_PN] && nla_get_u64(attrs[MACSEC_SA_ATTR_PN]) == 0)
2337 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
2338 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
2345 static int macsec_upd_txsa(struct sk_buff *skb, struct genl_info *info)
2347 struct nlattr **attrs = info->attrs;
2348 struct net_device *dev;
2349 struct macsec_secy *secy;
2350 struct macsec_tx_sc *tx_sc;
2351 struct macsec_tx_sa *tx_sa;
2353 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2354 bool was_operational, was_active;
2360 if (!attrs[MACSEC_ATTR_IFINDEX])
2363 if (parse_sa_config(attrs, tb_sa))
2366 if (!validate_upd_sa(tb_sa))
2370 tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa,
2371 &dev, &secy, &tx_sc, &assoc_num);
2372 if (IS_ERR(tx_sa)) {
2374 return PTR_ERR(tx_sa);
2377 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2380 pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
2381 if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
2382 pr_notice("macsec: nl: upd_txsa: bad pn length: %d != %d\n",
2383 nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
2388 spin_lock_bh(&tx_sa->lock);
2389 prev_pn = tx_sa->next_pn_halves;
2390 tx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
2391 spin_unlock_bh(&tx_sa->lock);
2394 was_active = tx_sa->active;
2395 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2396 tx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2398 was_operational = secy->operational;
2399 if (assoc_num == tx_sc->encoding_sa)
2400 secy->operational = tx_sa->active;
2402 /* If h/w offloading is available, propagate to the device */
2403 if (macsec_is_offloaded(netdev_priv(dev))) {
2404 const struct macsec_ops *ops;
2405 struct macsec_context ctx;
2407 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2413 ctx.sa.assoc_num = assoc_num;
2414 ctx.sa.tx_sa = tx_sa;
2415 ctx.sa.update_pn = !!prev_pn.full64;
2418 ret = macsec_offload(ops->mdo_upd_txsa, &ctx);
2428 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2429 spin_lock_bh(&tx_sa->lock);
2430 tx_sa->next_pn_halves = prev_pn;
2431 spin_unlock_bh(&tx_sa->lock);
2433 tx_sa->active = was_active;
2434 secy->operational = was_operational;
2439 static int macsec_upd_rxsa(struct sk_buff *skb, struct genl_info *info)
2441 struct nlattr **attrs = info->attrs;
2442 struct net_device *dev;
2443 struct macsec_secy *secy;
2444 struct macsec_rx_sc *rx_sc;
2445 struct macsec_rx_sa *rx_sa;
2447 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2448 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2455 if (!attrs[MACSEC_ATTR_IFINDEX])
2458 if (parse_rxsc_config(attrs, tb_rxsc))
2461 if (parse_sa_config(attrs, tb_sa))
2464 if (!validate_upd_sa(tb_sa))
2468 rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa,
2469 &dev, &secy, &rx_sc, &assoc_num);
2470 if (IS_ERR(rx_sa)) {
2472 return PTR_ERR(rx_sa);
2475 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2478 pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
2479 if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
2480 pr_notice("macsec: nl: upd_rxsa: bad pn length: %d != %d\n",
2481 nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
2486 spin_lock_bh(&rx_sa->lock);
2487 prev_pn = rx_sa->next_pn_halves;
2488 rx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
2489 spin_unlock_bh(&rx_sa->lock);
2492 was_active = rx_sa->active;
2493 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2494 rx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2496 /* If h/w offloading is available, propagate to the device */
2497 if (macsec_is_offloaded(netdev_priv(dev))) {
2498 const struct macsec_ops *ops;
2499 struct macsec_context ctx;
2501 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2507 ctx.sa.assoc_num = assoc_num;
2508 ctx.sa.rx_sa = rx_sa;
2509 ctx.sa.update_pn = !!prev_pn.full64;
2512 ret = macsec_offload(ops->mdo_upd_rxsa, &ctx);
2521 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2522 spin_lock_bh(&rx_sa->lock);
2523 rx_sa->next_pn_halves = prev_pn;
2524 spin_unlock_bh(&rx_sa->lock);
2526 rx_sa->active = was_active;
2531 static int macsec_upd_rxsc(struct sk_buff *skb, struct genl_info *info)
2533 struct nlattr **attrs = info->attrs;
2534 struct net_device *dev;
2535 struct macsec_secy *secy;
2536 struct macsec_rx_sc *rx_sc;
2537 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2538 unsigned int prev_n_rx_sc;
2542 if (!attrs[MACSEC_ATTR_IFINDEX])
2545 if (parse_rxsc_config(attrs, tb_rxsc))
2548 if (!validate_add_rxsc(tb_rxsc))
2552 rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy);
2553 if (IS_ERR(rx_sc)) {
2555 return PTR_ERR(rx_sc);
2558 was_active = rx_sc->active;
2559 prev_n_rx_sc = secy->n_rx_sc;
2560 if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]) {
2561 bool new = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]);
2563 if (rx_sc->active != new)
2564 secy->n_rx_sc += new ? 1 : -1;
2566 rx_sc->active = new;
2569 /* If h/w offloading is available, propagate to the device */
2570 if (macsec_is_offloaded(netdev_priv(dev))) {
2571 const struct macsec_ops *ops;
2572 struct macsec_context ctx;
2574 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2583 ret = macsec_offload(ops->mdo_upd_rxsc, &ctx);
2593 secy->n_rx_sc = prev_n_rx_sc;
2594 rx_sc->active = was_active;
2599 static bool macsec_is_configured(struct macsec_dev *macsec)
2601 struct macsec_secy *secy = &macsec->secy;
2602 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
2608 for (i = 0; i < MACSEC_NUM_AN; i++)
2615 static bool macsec_needs_tx_tag(struct macsec_dev *macsec,
2616 const struct macsec_ops *ops)
2618 return macsec->offload == MACSEC_OFFLOAD_PHY &&
2619 ops->mdo_insert_tx_tag;
2622 static void macsec_set_head_tail_room(struct net_device *dev)
2624 struct macsec_dev *macsec = macsec_priv(dev);
2625 struct net_device *real_dev = macsec->real_dev;
2626 int needed_headroom, needed_tailroom;
2627 const struct macsec_ops *ops;
2629 ops = macsec_get_ops(macsec, NULL);
2631 needed_headroom = ops->needed_headroom;
2632 needed_tailroom = ops->needed_tailroom;
2634 needed_headroom = MACSEC_NEEDED_HEADROOM;
2635 needed_tailroom = MACSEC_NEEDED_TAILROOM;
2638 dev->needed_headroom = real_dev->needed_headroom + needed_headroom;
2639 dev->needed_tailroom = real_dev->needed_tailroom + needed_tailroom;
2642 static int macsec_update_offload(struct net_device *dev, enum macsec_offload offload)
2644 enum macsec_offload prev_offload;
2645 const struct macsec_ops *ops;
2646 struct macsec_context ctx;
2647 struct macsec_dev *macsec;
2650 macsec = macsec_priv(dev);
2652 /* Check if the offloading mode is supported by the underlying layers */
2653 if (offload != MACSEC_OFFLOAD_OFF &&
2654 !macsec_check_offload(offload, macsec))
2657 /* Check if the net device is busy. */
2658 if (netif_running(dev))
2661 /* Check if the device already has rules configured: we do not support
2664 if (macsec_is_configured(macsec))
2667 prev_offload = macsec->offload;
2669 ops = __macsec_get_ops(offload == MACSEC_OFFLOAD_OFF ? prev_offload : offload,
2674 macsec->offload = offload;
2676 ctx.secy = &macsec->secy;
2677 ret = offload == MACSEC_OFFLOAD_OFF ? macsec_offload(ops->mdo_del_secy, &ctx)
2678 : macsec_offload(ops->mdo_add_secy, &ctx);
2680 macsec->offload = prev_offload;
2684 macsec_set_head_tail_room(dev);
2685 macsec->insert_tx_tag = macsec_needs_tx_tag(macsec, ops);
2690 static int macsec_upd_offload(struct sk_buff *skb, struct genl_info *info)
2692 struct nlattr *tb_offload[MACSEC_OFFLOAD_ATTR_MAX + 1];
2693 struct nlattr **attrs = info->attrs;
2694 enum macsec_offload offload;
2695 struct macsec_dev *macsec;
2696 struct net_device *dev;
2699 if (!attrs[MACSEC_ATTR_IFINDEX])
2702 if (!attrs[MACSEC_ATTR_OFFLOAD])
2705 if (nla_parse_nested_deprecated(tb_offload, MACSEC_OFFLOAD_ATTR_MAX,
2706 attrs[MACSEC_ATTR_OFFLOAD],
2707 macsec_genl_offload_policy, NULL))
2712 dev = get_dev_from_nl(genl_info_net(info), attrs);
2717 macsec = macsec_priv(dev);
2719 if (!tb_offload[MACSEC_OFFLOAD_ATTR_TYPE]) {
2724 offload = nla_get_u8(tb_offload[MACSEC_OFFLOAD_ATTR_TYPE]);
2726 if (macsec->offload != offload)
2727 ret = macsec_update_offload(dev, offload);
2733 static void get_tx_sa_stats(struct net_device *dev, int an,
2734 struct macsec_tx_sa *tx_sa,
2735 struct macsec_tx_sa_stats *sum)
2737 struct macsec_dev *macsec = macsec_priv(dev);
2740 /* If h/w offloading is available, propagate to the device */
2741 if (macsec_is_offloaded(macsec)) {
2742 const struct macsec_ops *ops;
2743 struct macsec_context ctx;
2745 ops = macsec_get_ops(macsec, &ctx);
2747 ctx.sa.assoc_num = an;
2748 ctx.sa.tx_sa = tx_sa;
2749 ctx.stats.tx_sa_stats = sum;
2750 ctx.secy = &macsec_priv(dev)->secy;
2751 macsec_offload(ops->mdo_get_tx_sa_stats, &ctx);
2756 for_each_possible_cpu(cpu) {
2757 const struct macsec_tx_sa_stats *stats =
2758 per_cpu_ptr(tx_sa->stats, cpu);
2760 sum->OutPktsProtected += stats->OutPktsProtected;
2761 sum->OutPktsEncrypted += stats->OutPktsEncrypted;
2765 static int copy_tx_sa_stats(struct sk_buff *skb, struct macsec_tx_sa_stats *sum)
2767 if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_PROTECTED,
2768 sum->OutPktsProtected) ||
2769 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_ENCRYPTED,
2770 sum->OutPktsEncrypted))
2776 static void get_rx_sa_stats(struct net_device *dev,
2777 struct macsec_rx_sc *rx_sc, int an,
2778 struct macsec_rx_sa *rx_sa,
2779 struct macsec_rx_sa_stats *sum)
2781 struct macsec_dev *macsec = macsec_priv(dev);
2784 /* If h/w offloading is available, propagate to the device */
2785 if (macsec_is_offloaded(macsec)) {
2786 const struct macsec_ops *ops;
2787 struct macsec_context ctx;
2789 ops = macsec_get_ops(macsec, &ctx);
2791 ctx.sa.assoc_num = an;
2792 ctx.sa.rx_sa = rx_sa;
2793 ctx.stats.rx_sa_stats = sum;
2794 ctx.secy = &macsec_priv(dev)->secy;
2796 macsec_offload(ops->mdo_get_rx_sa_stats, &ctx);
2801 for_each_possible_cpu(cpu) {
2802 const struct macsec_rx_sa_stats *stats =
2803 per_cpu_ptr(rx_sa->stats, cpu);
2805 sum->InPktsOK += stats->InPktsOK;
2806 sum->InPktsInvalid += stats->InPktsInvalid;
2807 sum->InPktsNotValid += stats->InPktsNotValid;
2808 sum->InPktsNotUsingSA += stats->InPktsNotUsingSA;
2809 sum->InPktsUnusedSA += stats->InPktsUnusedSA;
2813 static int copy_rx_sa_stats(struct sk_buff *skb,
2814 struct macsec_rx_sa_stats *sum)
2816 if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_OK, sum->InPktsOK) ||
2817 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_INVALID,
2818 sum->InPktsInvalid) ||
2819 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_VALID,
2820 sum->InPktsNotValid) ||
2821 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_USING_SA,
2822 sum->InPktsNotUsingSA) ||
2823 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_UNUSED_SA,
2824 sum->InPktsUnusedSA))
2830 static void get_rx_sc_stats(struct net_device *dev,
2831 struct macsec_rx_sc *rx_sc,
2832 struct macsec_rx_sc_stats *sum)
2834 struct macsec_dev *macsec = macsec_priv(dev);
2837 /* If h/w offloading is available, propagate to the device */
2838 if (macsec_is_offloaded(macsec)) {
2839 const struct macsec_ops *ops;
2840 struct macsec_context ctx;
2842 ops = macsec_get_ops(macsec, &ctx);
2844 ctx.stats.rx_sc_stats = sum;
2845 ctx.secy = &macsec_priv(dev)->secy;
2847 macsec_offload(ops->mdo_get_rx_sc_stats, &ctx);
2852 for_each_possible_cpu(cpu) {
2853 const struct pcpu_rx_sc_stats *stats;
2854 struct macsec_rx_sc_stats tmp;
2857 stats = per_cpu_ptr(rx_sc->stats, cpu);
2859 start = u64_stats_fetch_begin(&stats->syncp);
2860 memcpy(&tmp, &stats->stats, sizeof(tmp));
2861 } while (u64_stats_fetch_retry(&stats->syncp, start));
2863 sum->InOctetsValidated += tmp.InOctetsValidated;
2864 sum->InOctetsDecrypted += tmp.InOctetsDecrypted;
2865 sum->InPktsUnchecked += tmp.InPktsUnchecked;
2866 sum->InPktsDelayed += tmp.InPktsDelayed;
2867 sum->InPktsOK += tmp.InPktsOK;
2868 sum->InPktsInvalid += tmp.InPktsInvalid;
2869 sum->InPktsLate += tmp.InPktsLate;
2870 sum->InPktsNotValid += tmp.InPktsNotValid;
2871 sum->InPktsNotUsingSA += tmp.InPktsNotUsingSA;
2872 sum->InPktsUnusedSA += tmp.InPktsUnusedSA;
2876 static int copy_rx_sc_stats(struct sk_buff *skb, struct macsec_rx_sc_stats *sum)
2878 if (nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_VALIDATED,
2879 sum->InOctetsValidated,
2880 MACSEC_RXSC_STATS_ATTR_PAD) ||
2881 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_DECRYPTED,
2882 sum->InOctetsDecrypted,
2883 MACSEC_RXSC_STATS_ATTR_PAD) ||
2884 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNCHECKED,
2885 sum->InPktsUnchecked,
2886 MACSEC_RXSC_STATS_ATTR_PAD) ||
2887 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_DELAYED,
2889 MACSEC_RXSC_STATS_ATTR_PAD) ||
2890 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_OK,
2892 MACSEC_RXSC_STATS_ATTR_PAD) ||
2893 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_INVALID,
2895 MACSEC_RXSC_STATS_ATTR_PAD) ||
2896 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_LATE,
2898 MACSEC_RXSC_STATS_ATTR_PAD) ||
2899 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_VALID,
2900 sum->InPktsNotValid,
2901 MACSEC_RXSC_STATS_ATTR_PAD) ||
2902 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_USING_SA,
2903 sum->InPktsNotUsingSA,
2904 MACSEC_RXSC_STATS_ATTR_PAD) ||
2905 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNUSED_SA,
2906 sum->InPktsUnusedSA,
2907 MACSEC_RXSC_STATS_ATTR_PAD))
2913 static void get_tx_sc_stats(struct net_device *dev,
2914 struct macsec_tx_sc_stats *sum)
2916 struct macsec_dev *macsec = macsec_priv(dev);
2919 /* If h/w offloading is available, propagate to the device */
2920 if (macsec_is_offloaded(macsec)) {
2921 const struct macsec_ops *ops;
2922 struct macsec_context ctx;
2924 ops = macsec_get_ops(macsec, &ctx);
2926 ctx.stats.tx_sc_stats = sum;
2927 ctx.secy = &macsec_priv(dev)->secy;
2928 macsec_offload(ops->mdo_get_tx_sc_stats, &ctx);
2933 for_each_possible_cpu(cpu) {
2934 const struct pcpu_tx_sc_stats *stats;
2935 struct macsec_tx_sc_stats tmp;
2938 stats = per_cpu_ptr(macsec_priv(dev)->secy.tx_sc.stats, cpu);
2940 start = u64_stats_fetch_begin(&stats->syncp);
2941 memcpy(&tmp, &stats->stats, sizeof(tmp));
2942 } while (u64_stats_fetch_retry(&stats->syncp, start));
2944 sum->OutPktsProtected += tmp.OutPktsProtected;
2945 sum->OutPktsEncrypted += tmp.OutPktsEncrypted;
2946 sum->OutOctetsProtected += tmp.OutOctetsProtected;
2947 sum->OutOctetsEncrypted += tmp.OutOctetsEncrypted;
2951 static int copy_tx_sc_stats(struct sk_buff *skb, struct macsec_tx_sc_stats *sum)
2953 if (nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_PROTECTED,
2954 sum->OutPktsProtected,
2955 MACSEC_TXSC_STATS_ATTR_PAD) ||
2956 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_ENCRYPTED,
2957 sum->OutPktsEncrypted,
2958 MACSEC_TXSC_STATS_ATTR_PAD) ||
2959 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_PROTECTED,
2960 sum->OutOctetsProtected,
2961 MACSEC_TXSC_STATS_ATTR_PAD) ||
2962 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_ENCRYPTED,
2963 sum->OutOctetsEncrypted,
2964 MACSEC_TXSC_STATS_ATTR_PAD))
2970 static void get_secy_stats(struct net_device *dev, struct macsec_dev_stats *sum)
2972 struct macsec_dev *macsec = macsec_priv(dev);
2975 /* If h/w offloading is available, propagate to the device */
2976 if (macsec_is_offloaded(macsec)) {
2977 const struct macsec_ops *ops;
2978 struct macsec_context ctx;
2980 ops = macsec_get_ops(macsec, &ctx);
2982 ctx.stats.dev_stats = sum;
2983 ctx.secy = &macsec_priv(dev)->secy;
2984 macsec_offload(ops->mdo_get_dev_stats, &ctx);
2989 for_each_possible_cpu(cpu) {
2990 const struct pcpu_secy_stats *stats;
2991 struct macsec_dev_stats tmp;
2994 stats = per_cpu_ptr(macsec_priv(dev)->stats, cpu);
2996 start = u64_stats_fetch_begin(&stats->syncp);
2997 memcpy(&tmp, &stats->stats, sizeof(tmp));
2998 } while (u64_stats_fetch_retry(&stats->syncp, start));
3000 sum->OutPktsUntagged += tmp.OutPktsUntagged;
3001 sum->InPktsUntagged += tmp.InPktsUntagged;
3002 sum->OutPktsTooLong += tmp.OutPktsTooLong;
3003 sum->InPktsNoTag += tmp.InPktsNoTag;
3004 sum->InPktsBadTag += tmp.InPktsBadTag;
3005 sum->InPktsUnknownSCI += tmp.InPktsUnknownSCI;
3006 sum->InPktsNoSCI += tmp.InPktsNoSCI;
3007 sum->InPktsOverrun += tmp.InPktsOverrun;
3011 static int copy_secy_stats(struct sk_buff *skb, struct macsec_dev_stats *sum)
3013 if (nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_UNTAGGED,
3014 sum->OutPktsUntagged,
3015 MACSEC_SECY_STATS_ATTR_PAD) ||
3016 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNTAGGED,
3017 sum->InPktsUntagged,
3018 MACSEC_SECY_STATS_ATTR_PAD) ||
3019 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_TOO_LONG,
3020 sum->OutPktsTooLong,
3021 MACSEC_SECY_STATS_ATTR_PAD) ||
3022 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_TAG,
3024 MACSEC_SECY_STATS_ATTR_PAD) ||
3025 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_BAD_TAG,
3027 MACSEC_SECY_STATS_ATTR_PAD) ||
3028 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNKNOWN_SCI,
3029 sum->InPktsUnknownSCI,
3030 MACSEC_SECY_STATS_ATTR_PAD) ||
3031 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_SCI,
3033 MACSEC_SECY_STATS_ATTR_PAD) ||
3034 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_OVERRUN,
3036 MACSEC_SECY_STATS_ATTR_PAD))
3042 static int nla_put_secy(struct macsec_secy *secy, struct sk_buff *skb)
3044 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
3045 struct nlattr *secy_nest = nla_nest_start_noflag(skb,
3052 switch (secy->key_len) {
3053 case MACSEC_GCM_AES_128_SAK_LEN:
3054 csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_128 : MACSEC_DEFAULT_CIPHER_ID;
3056 case MACSEC_GCM_AES_256_SAK_LEN:
3057 csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_256 : MACSEC_CIPHER_ID_GCM_AES_256;
3063 if (nla_put_sci(skb, MACSEC_SECY_ATTR_SCI, secy->sci,
3064 MACSEC_SECY_ATTR_PAD) ||
3065 nla_put_u64_64bit(skb, MACSEC_SECY_ATTR_CIPHER_SUITE,
3066 csid, MACSEC_SECY_ATTR_PAD) ||
3067 nla_put_u8(skb, MACSEC_SECY_ATTR_ICV_LEN, secy->icv_len) ||
3068 nla_put_u8(skb, MACSEC_SECY_ATTR_OPER, secy->operational) ||
3069 nla_put_u8(skb, MACSEC_SECY_ATTR_PROTECT, secy->protect_frames) ||
3070 nla_put_u8(skb, MACSEC_SECY_ATTR_REPLAY, secy->replay_protect) ||
3071 nla_put_u8(skb, MACSEC_SECY_ATTR_VALIDATE, secy->validate_frames) ||
3072 nla_put_u8(skb, MACSEC_SECY_ATTR_ENCRYPT, tx_sc->encrypt) ||
3073 nla_put_u8(skb, MACSEC_SECY_ATTR_INC_SCI, tx_sc->send_sci) ||
3074 nla_put_u8(skb, MACSEC_SECY_ATTR_ES, tx_sc->end_station) ||
3075 nla_put_u8(skb, MACSEC_SECY_ATTR_SCB, tx_sc->scb) ||
3076 nla_put_u8(skb, MACSEC_SECY_ATTR_ENCODING_SA, tx_sc->encoding_sa))
3079 if (secy->replay_protect) {
3080 if (nla_put_u32(skb, MACSEC_SECY_ATTR_WINDOW, secy->replay_window))
3084 nla_nest_end(skb, secy_nest);
3088 nla_nest_cancel(skb, secy_nest);
3092 static noinline_for_stack int
3093 dump_secy(struct macsec_secy *secy, struct net_device *dev,
3094 struct sk_buff *skb, struct netlink_callback *cb)
3096 struct macsec_tx_sc_stats tx_sc_stats = {0, };
3097 struct macsec_tx_sa_stats tx_sa_stats = {0, };
3098 struct macsec_rx_sc_stats rx_sc_stats = {0, };
3099 struct macsec_rx_sa_stats rx_sa_stats = {0, };
3100 struct macsec_dev *macsec = netdev_priv(dev);
3101 struct macsec_dev_stats dev_stats = {0, };
3102 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
3103 struct nlattr *txsa_list, *rxsc_list;
3104 struct macsec_rx_sc *rx_sc;
3105 struct nlattr *attr;
3109 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
3110 &macsec_fam, NLM_F_MULTI, MACSEC_CMD_GET_TXSC);
3114 genl_dump_check_consistent(cb, hdr);
3116 if (nla_put_u32(skb, MACSEC_ATTR_IFINDEX, dev->ifindex))
3117 goto nla_put_failure;
3119 attr = nla_nest_start_noflag(skb, MACSEC_ATTR_OFFLOAD);
3121 goto nla_put_failure;
3122 if (nla_put_u8(skb, MACSEC_OFFLOAD_ATTR_TYPE, macsec->offload))
3123 goto nla_put_failure;
3124 nla_nest_end(skb, attr);
3126 if (nla_put_secy(secy, skb))
3127 goto nla_put_failure;
3129 attr = nla_nest_start_noflag(skb, MACSEC_ATTR_TXSC_STATS);
3131 goto nla_put_failure;
3133 get_tx_sc_stats(dev, &tx_sc_stats);
3134 if (copy_tx_sc_stats(skb, &tx_sc_stats)) {
3135 nla_nest_cancel(skb, attr);
3136 goto nla_put_failure;
3138 nla_nest_end(skb, attr);
3140 attr = nla_nest_start_noflag(skb, MACSEC_ATTR_SECY_STATS);
3142 goto nla_put_failure;
3143 get_secy_stats(dev, &dev_stats);
3144 if (copy_secy_stats(skb, &dev_stats)) {
3145 nla_nest_cancel(skb, attr);
3146 goto nla_put_failure;
3148 nla_nest_end(skb, attr);
3150 txsa_list = nla_nest_start_noflag(skb, MACSEC_ATTR_TXSA_LIST);
3152 goto nla_put_failure;
3153 for (i = 0, j = 1; i < MACSEC_NUM_AN; i++) {
3154 struct macsec_tx_sa *tx_sa = rtnl_dereference(tx_sc->sa[i]);
3155 struct nlattr *txsa_nest;
3162 txsa_nest = nla_nest_start_noflag(skb, j++);
3164 nla_nest_cancel(skb, txsa_list);
3165 goto nla_put_failure;
3168 attr = nla_nest_start_noflag(skb, MACSEC_SA_ATTR_STATS);
3170 nla_nest_cancel(skb, txsa_nest);
3171 nla_nest_cancel(skb, txsa_list);
3172 goto nla_put_failure;
3174 memset(&tx_sa_stats, 0, sizeof(tx_sa_stats));
3175 get_tx_sa_stats(dev, i, tx_sa, &tx_sa_stats);
3176 if (copy_tx_sa_stats(skb, &tx_sa_stats)) {
3177 nla_nest_cancel(skb, attr);
3178 nla_nest_cancel(skb, txsa_nest);
3179 nla_nest_cancel(skb, txsa_list);
3180 goto nla_put_failure;
3182 nla_nest_end(skb, attr);
3185 pn = tx_sa->next_pn;
3186 pn_len = MACSEC_XPN_PN_LEN;
3188 pn = tx_sa->next_pn_halves.lower;
3189 pn_len = MACSEC_DEFAULT_PN_LEN;
3192 if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) ||
3193 nla_put(skb, MACSEC_SA_ATTR_PN, pn_len, &pn) ||
3194 nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, tx_sa->key.id) ||
3195 (secy->xpn && nla_put_ssci(skb, MACSEC_SA_ATTR_SSCI, tx_sa->ssci)) ||
3196 nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, tx_sa->active)) {
3197 nla_nest_cancel(skb, txsa_nest);
3198 nla_nest_cancel(skb, txsa_list);
3199 goto nla_put_failure;
3202 nla_nest_end(skb, txsa_nest);
3204 nla_nest_end(skb, txsa_list);
3206 rxsc_list = nla_nest_start_noflag(skb, MACSEC_ATTR_RXSC_LIST);
3208 goto nla_put_failure;
3211 for_each_rxsc_rtnl(secy, rx_sc) {
3213 struct nlattr *rxsa_list;
3214 struct nlattr *rxsc_nest = nla_nest_start_noflag(skb, j++);
3217 nla_nest_cancel(skb, rxsc_list);
3218 goto nla_put_failure;
3221 if (nla_put_u8(skb, MACSEC_RXSC_ATTR_ACTIVE, rx_sc->active) ||
3222 nla_put_sci(skb, MACSEC_RXSC_ATTR_SCI, rx_sc->sci,
3223 MACSEC_RXSC_ATTR_PAD)) {
3224 nla_nest_cancel(skb, rxsc_nest);
3225 nla_nest_cancel(skb, rxsc_list);
3226 goto nla_put_failure;
3229 attr = nla_nest_start_noflag(skb, MACSEC_RXSC_ATTR_STATS);
3231 nla_nest_cancel(skb, rxsc_nest);
3232 nla_nest_cancel(skb, rxsc_list);
3233 goto nla_put_failure;
3235 memset(&rx_sc_stats, 0, sizeof(rx_sc_stats));
3236 get_rx_sc_stats(dev, rx_sc, &rx_sc_stats);
3237 if (copy_rx_sc_stats(skb, &rx_sc_stats)) {
3238 nla_nest_cancel(skb, attr);
3239 nla_nest_cancel(skb, rxsc_nest);
3240 nla_nest_cancel(skb, rxsc_list);
3241 goto nla_put_failure;
3243 nla_nest_end(skb, attr);
3245 rxsa_list = nla_nest_start_noflag(skb,
3246 MACSEC_RXSC_ATTR_SA_LIST);
3248 nla_nest_cancel(skb, rxsc_nest);
3249 nla_nest_cancel(skb, rxsc_list);
3250 goto nla_put_failure;
3253 for (i = 0, k = 1; i < MACSEC_NUM_AN; i++) {
3254 struct macsec_rx_sa *rx_sa = rtnl_dereference(rx_sc->sa[i]);
3255 struct nlattr *rxsa_nest;
3262 rxsa_nest = nla_nest_start_noflag(skb, k++);
3264 nla_nest_cancel(skb, rxsa_list);
3265 nla_nest_cancel(skb, rxsc_nest);
3266 nla_nest_cancel(skb, rxsc_list);
3267 goto nla_put_failure;
3270 attr = nla_nest_start_noflag(skb,
3271 MACSEC_SA_ATTR_STATS);
3273 nla_nest_cancel(skb, rxsa_list);
3274 nla_nest_cancel(skb, rxsc_nest);
3275 nla_nest_cancel(skb, rxsc_list);
3276 goto nla_put_failure;
3278 memset(&rx_sa_stats, 0, sizeof(rx_sa_stats));
3279 get_rx_sa_stats(dev, rx_sc, i, rx_sa, &rx_sa_stats);
3280 if (copy_rx_sa_stats(skb, &rx_sa_stats)) {
3281 nla_nest_cancel(skb, attr);
3282 nla_nest_cancel(skb, rxsa_list);
3283 nla_nest_cancel(skb, rxsc_nest);
3284 nla_nest_cancel(skb, rxsc_list);
3285 goto nla_put_failure;
3287 nla_nest_end(skb, attr);
3290 pn = rx_sa->next_pn;
3291 pn_len = MACSEC_XPN_PN_LEN;
3293 pn = rx_sa->next_pn_halves.lower;
3294 pn_len = MACSEC_DEFAULT_PN_LEN;
3297 if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) ||
3298 nla_put(skb, MACSEC_SA_ATTR_PN, pn_len, &pn) ||
3299 nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, rx_sa->key.id) ||
3300 (secy->xpn && nla_put_ssci(skb, MACSEC_SA_ATTR_SSCI, rx_sa->ssci)) ||
3301 nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, rx_sa->active)) {
3302 nla_nest_cancel(skb, rxsa_nest);
3303 nla_nest_cancel(skb, rxsc_nest);
3304 nla_nest_cancel(skb, rxsc_list);
3305 goto nla_put_failure;
3307 nla_nest_end(skb, rxsa_nest);
3310 nla_nest_end(skb, rxsa_list);
3311 nla_nest_end(skb, rxsc_nest);
3314 nla_nest_end(skb, rxsc_list);
3316 genlmsg_end(skb, hdr);
3321 genlmsg_cancel(skb, hdr);
3325 static int macsec_generation = 1; /* protected by RTNL */
3327 static int macsec_dump_txsc(struct sk_buff *skb, struct netlink_callback *cb)
3329 struct net *net = sock_net(skb->sk);
3330 struct net_device *dev;
3333 dev_idx = cb->args[0];
3338 cb->seq = macsec_generation;
3340 for_each_netdev(net, dev) {
3341 struct macsec_secy *secy;
3346 if (!netif_is_macsec(dev))
3349 secy = &macsec_priv(dev)->secy;
3350 if (dump_secy(secy, dev, skb, cb) < 0)
3362 static const struct genl_small_ops macsec_genl_ops[] = {
3364 .cmd = MACSEC_CMD_GET_TXSC,
3365 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3366 .dumpit = macsec_dump_txsc,
3369 .cmd = MACSEC_CMD_ADD_RXSC,
3370 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3371 .doit = macsec_add_rxsc,
3372 .flags = GENL_ADMIN_PERM,
3375 .cmd = MACSEC_CMD_DEL_RXSC,
3376 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3377 .doit = macsec_del_rxsc,
3378 .flags = GENL_ADMIN_PERM,
3381 .cmd = MACSEC_CMD_UPD_RXSC,
3382 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3383 .doit = macsec_upd_rxsc,
3384 .flags = GENL_ADMIN_PERM,
3387 .cmd = MACSEC_CMD_ADD_TXSA,
3388 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3389 .doit = macsec_add_txsa,
3390 .flags = GENL_ADMIN_PERM,
3393 .cmd = MACSEC_CMD_DEL_TXSA,
3394 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3395 .doit = macsec_del_txsa,
3396 .flags = GENL_ADMIN_PERM,
3399 .cmd = MACSEC_CMD_UPD_TXSA,
3400 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3401 .doit = macsec_upd_txsa,
3402 .flags = GENL_ADMIN_PERM,
3405 .cmd = MACSEC_CMD_ADD_RXSA,
3406 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3407 .doit = macsec_add_rxsa,
3408 .flags = GENL_ADMIN_PERM,
3411 .cmd = MACSEC_CMD_DEL_RXSA,
3412 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3413 .doit = macsec_del_rxsa,
3414 .flags = GENL_ADMIN_PERM,
3417 .cmd = MACSEC_CMD_UPD_RXSA,
3418 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3419 .doit = macsec_upd_rxsa,
3420 .flags = GENL_ADMIN_PERM,
3423 .cmd = MACSEC_CMD_UPD_OFFLOAD,
3424 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3425 .doit = macsec_upd_offload,
3426 .flags = GENL_ADMIN_PERM,
3430 static struct genl_family macsec_fam __ro_after_init = {
3431 .name = MACSEC_GENL_NAME,
3433 .version = MACSEC_GENL_VERSION,
3434 .maxattr = MACSEC_ATTR_MAX,
3435 .policy = macsec_genl_policy,
3437 .module = THIS_MODULE,
3438 .small_ops = macsec_genl_ops,
3439 .n_small_ops = ARRAY_SIZE(macsec_genl_ops),
3440 .resv_start_op = MACSEC_CMD_UPD_OFFLOAD + 1,
3443 static struct sk_buff *macsec_insert_tx_tag(struct sk_buff *skb,
3444 struct net_device *dev)
3446 struct macsec_dev *macsec = macsec_priv(dev);
3447 const struct macsec_ops *ops;
3448 struct phy_device *phydev;
3449 struct macsec_context ctx;
3453 ops = macsec_get_ops(macsec, &ctx);
3454 skb_final_len = skb->len - ETH_HLEN + ops->needed_headroom +
3455 ops->needed_tailroom;
3456 if (unlikely(skb_final_len > macsec->real_dev->mtu)) {
3461 phydev = macsec->real_dev->phydev;
3463 err = skb_ensure_writable_head_tail(skb, dev);
3464 if (unlikely(err < 0))
3467 err = ops->mdo_insert_tx_tag(phydev, skb);
3474 return ERR_PTR(err);
3477 static netdev_tx_t macsec_start_xmit(struct sk_buff *skb,
3478 struct net_device *dev)
3480 struct macsec_dev *macsec = netdev_priv(dev);
3481 struct macsec_secy *secy = &macsec->secy;
3482 struct pcpu_secy_stats *secy_stats;
3485 if (macsec_is_offloaded(netdev_priv(dev))) {
3486 struct metadata_dst *md_dst = secy->tx_sc.md_dst;
3489 dst_hold(&md_dst->dst);
3490 skb_dst_set(skb, &md_dst->dst);
3492 if (macsec->insert_tx_tag) {
3493 skb = macsec_insert_tx_tag(skb, dev);
3495 DEV_STATS_INC(dev, tx_dropped);
3496 return NETDEV_TX_OK;
3500 skb->dev = macsec->real_dev;
3501 return dev_queue_xmit(skb);
3505 if (!secy->protect_frames) {
3506 secy_stats = this_cpu_ptr(macsec->stats);
3507 u64_stats_update_begin(&secy_stats->syncp);
3508 secy_stats->stats.OutPktsUntagged++;
3509 u64_stats_update_end(&secy_stats->syncp);
3510 skb->dev = macsec->real_dev;
3512 ret = dev_queue_xmit(skb);
3513 count_tx(dev, ret, len);
3517 if (!secy->operational) {
3519 DEV_STATS_INC(dev, tx_dropped);
3520 return NETDEV_TX_OK;
3524 skb = macsec_encrypt(skb, dev);
3526 if (PTR_ERR(skb) != -EINPROGRESS)
3527 DEV_STATS_INC(dev, tx_dropped);
3528 return NETDEV_TX_OK;
3531 macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa);
3533 macsec_encrypt_finish(skb, dev);
3534 ret = dev_queue_xmit(skb);
3535 count_tx(dev, ret, len);
3539 #define MACSEC_FEATURES \
3540 (NETIF_F_SG | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST)
3542 static int macsec_dev_init(struct net_device *dev)
3544 struct macsec_dev *macsec = macsec_priv(dev);
3545 struct net_device *real_dev = macsec->real_dev;
3548 err = gro_cells_init(&macsec->gro_cells, dev);
3552 dev->features = real_dev->features & MACSEC_FEATURES;
3553 dev->features |= NETIF_F_LLTX | NETIF_F_GSO_SOFTWARE;
3554 dev->pcpu_stat_type = NETDEV_PCPU_STAT_TSTATS;
3556 macsec_set_head_tail_room(dev);
3558 if (is_zero_ether_addr(dev->dev_addr))
3559 eth_hw_addr_inherit(dev, real_dev);
3560 if (is_zero_ether_addr(dev->broadcast))
3561 memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len);
3563 /* Get macsec's reference to real_dev */
3564 netdev_hold(real_dev, &macsec->dev_tracker, GFP_KERNEL);
3569 static void macsec_dev_uninit(struct net_device *dev)
3571 struct macsec_dev *macsec = macsec_priv(dev);
3573 gro_cells_destroy(&macsec->gro_cells);
3576 static netdev_features_t macsec_fix_features(struct net_device *dev,
3577 netdev_features_t features)
3579 struct macsec_dev *macsec = macsec_priv(dev);
3580 struct net_device *real_dev = macsec->real_dev;
3582 features &= (real_dev->features & MACSEC_FEATURES) |
3583 NETIF_F_GSO_SOFTWARE | NETIF_F_SOFT_FEATURES;
3584 features |= NETIF_F_LLTX;
3589 static int macsec_dev_open(struct net_device *dev)
3591 struct macsec_dev *macsec = macsec_priv(dev);
3592 struct net_device *real_dev = macsec->real_dev;
3595 err = dev_uc_add(real_dev, dev->dev_addr);
3599 if (dev->flags & IFF_ALLMULTI) {
3600 err = dev_set_allmulti(real_dev, 1);
3605 if (dev->flags & IFF_PROMISC) {
3606 err = dev_set_promiscuity(real_dev, 1);
3608 goto clear_allmulti;
3611 /* If h/w offloading is available, propagate to the device */
3612 if (macsec_is_offloaded(macsec)) {
3613 const struct macsec_ops *ops;
3614 struct macsec_context ctx;
3616 ops = macsec_get_ops(netdev_priv(dev), &ctx);
3619 goto clear_allmulti;
3622 ctx.secy = &macsec->secy;
3623 err = macsec_offload(ops->mdo_dev_open, &ctx);
3625 goto clear_allmulti;
3628 if (netif_carrier_ok(real_dev))
3629 netif_carrier_on(dev);
3633 if (dev->flags & IFF_ALLMULTI)
3634 dev_set_allmulti(real_dev, -1);
3636 dev_uc_del(real_dev, dev->dev_addr);
3637 netif_carrier_off(dev);
3641 static int macsec_dev_stop(struct net_device *dev)
3643 struct macsec_dev *macsec = macsec_priv(dev);
3644 struct net_device *real_dev = macsec->real_dev;
3646 netif_carrier_off(dev);
3648 /* If h/w offloading is available, propagate to the device */
3649 if (macsec_is_offloaded(macsec)) {
3650 const struct macsec_ops *ops;
3651 struct macsec_context ctx;
3653 ops = macsec_get_ops(macsec, &ctx);
3655 ctx.secy = &macsec->secy;
3656 macsec_offload(ops->mdo_dev_stop, &ctx);
3660 dev_mc_unsync(real_dev, dev);
3661 dev_uc_unsync(real_dev, dev);
3663 if (dev->flags & IFF_ALLMULTI)
3664 dev_set_allmulti(real_dev, -1);
3666 if (dev->flags & IFF_PROMISC)
3667 dev_set_promiscuity(real_dev, -1);
3669 dev_uc_del(real_dev, dev->dev_addr);
3674 static void macsec_dev_change_rx_flags(struct net_device *dev, int change)
3676 struct net_device *real_dev = macsec_priv(dev)->real_dev;
3678 if (!(dev->flags & IFF_UP))
3681 if (change & IFF_ALLMULTI)
3682 dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1);
3684 if (change & IFF_PROMISC)
3685 dev_set_promiscuity(real_dev,
3686 dev->flags & IFF_PROMISC ? 1 : -1);
3689 static void macsec_dev_set_rx_mode(struct net_device *dev)
3691 struct net_device *real_dev = macsec_priv(dev)->real_dev;
3693 dev_mc_sync(real_dev, dev);
3694 dev_uc_sync(real_dev, dev);
3697 static int macsec_set_mac_address(struct net_device *dev, void *p)
3699 struct macsec_dev *macsec = macsec_priv(dev);
3700 struct net_device *real_dev = macsec->real_dev;
3701 struct sockaddr *addr = p;
3702 u8 old_addr[ETH_ALEN];
3705 if (!is_valid_ether_addr(addr->sa_data))
3706 return -EADDRNOTAVAIL;
3708 if (dev->flags & IFF_UP) {
3709 err = dev_uc_add(real_dev, addr->sa_data);
3714 ether_addr_copy(old_addr, dev->dev_addr);
3715 eth_hw_addr_set(dev, addr->sa_data);
3717 /* If h/w offloading is available, propagate to the device */
3718 if (macsec_is_offloaded(macsec)) {
3719 const struct macsec_ops *ops;
3720 struct macsec_context ctx;
3722 ops = macsec_get_ops(macsec, &ctx);
3725 goto restore_old_addr;
3728 ctx.secy = &macsec->secy;
3729 err = macsec_offload(ops->mdo_upd_secy, &ctx);
3731 goto restore_old_addr;
3734 if (dev->flags & IFF_UP)
3735 dev_uc_del(real_dev, old_addr);
3740 if (dev->flags & IFF_UP)
3741 dev_uc_del(real_dev, addr->sa_data);
3743 eth_hw_addr_set(dev, old_addr);
3748 static int macsec_change_mtu(struct net_device *dev, int new_mtu)
3750 struct macsec_dev *macsec = macsec_priv(dev);
3751 unsigned int extra = macsec->secy.icv_len + macsec_extra_len(true);
3753 if (macsec->real_dev->mtu - extra < new_mtu)
3756 WRITE_ONCE(dev->mtu, new_mtu);
3761 static void macsec_get_stats64(struct net_device *dev,
3762 struct rtnl_link_stats64 *s)
3767 dev_fetch_sw_netstats(s, dev->tstats);
3769 s->rx_dropped = DEV_STATS_READ(dev, rx_dropped);
3770 s->tx_dropped = DEV_STATS_READ(dev, tx_dropped);
3771 s->rx_errors = DEV_STATS_READ(dev, rx_errors);
3774 static int macsec_get_iflink(const struct net_device *dev)
3776 return READ_ONCE(macsec_priv(dev)->real_dev->ifindex);
3779 static const struct net_device_ops macsec_netdev_ops = {
3780 .ndo_init = macsec_dev_init,
3781 .ndo_uninit = macsec_dev_uninit,
3782 .ndo_open = macsec_dev_open,
3783 .ndo_stop = macsec_dev_stop,
3784 .ndo_fix_features = macsec_fix_features,
3785 .ndo_change_mtu = macsec_change_mtu,
3786 .ndo_set_rx_mode = macsec_dev_set_rx_mode,
3787 .ndo_change_rx_flags = macsec_dev_change_rx_flags,
3788 .ndo_set_mac_address = macsec_set_mac_address,
3789 .ndo_start_xmit = macsec_start_xmit,
3790 .ndo_get_stats64 = macsec_get_stats64,
3791 .ndo_get_iflink = macsec_get_iflink,
3794 static const struct device_type macsec_type = {
3798 static const struct nla_policy macsec_rtnl_policy[IFLA_MACSEC_MAX + 1] = {
3799 [IFLA_MACSEC_SCI] = { .type = NLA_U64 },
3800 [IFLA_MACSEC_PORT] = { .type = NLA_U16 },
3801 [IFLA_MACSEC_ICV_LEN] = { .type = NLA_U8 },
3802 [IFLA_MACSEC_CIPHER_SUITE] = { .type = NLA_U64 },
3803 [IFLA_MACSEC_WINDOW] = { .type = NLA_U32 },
3804 [IFLA_MACSEC_ENCODING_SA] = { .type = NLA_U8 },
3805 [IFLA_MACSEC_ENCRYPT] = { .type = NLA_U8 },
3806 [IFLA_MACSEC_PROTECT] = { .type = NLA_U8 },
3807 [IFLA_MACSEC_INC_SCI] = { .type = NLA_U8 },
3808 [IFLA_MACSEC_ES] = { .type = NLA_U8 },
3809 [IFLA_MACSEC_SCB] = { .type = NLA_U8 },
3810 [IFLA_MACSEC_REPLAY_PROTECT] = { .type = NLA_U8 },
3811 [IFLA_MACSEC_VALIDATION] = { .type = NLA_U8 },
3812 [IFLA_MACSEC_OFFLOAD] = { .type = NLA_U8 },
3815 static void macsec_free_netdev(struct net_device *dev)
3817 struct macsec_dev *macsec = macsec_priv(dev);
3819 if (macsec->secy.tx_sc.md_dst)
3820 metadata_dst_free(macsec->secy.tx_sc.md_dst);
3821 free_percpu(macsec->stats);
3822 free_percpu(macsec->secy.tx_sc.stats);
3824 /* Get rid of the macsec's reference to real_dev */
3825 netdev_put(macsec->real_dev, &macsec->dev_tracker);
3828 static void macsec_setup(struct net_device *dev)
3832 dev->max_mtu = ETH_MAX_MTU;
3833 dev->priv_flags |= IFF_NO_QUEUE;
3834 dev->netdev_ops = &macsec_netdev_ops;
3835 dev->needs_free_netdev = true;
3836 dev->priv_destructor = macsec_free_netdev;
3837 SET_NETDEV_DEVTYPE(dev, &macsec_type);
3839 eth_zero_addr(dev->broadcast);
3842 static int macsec_changelink_common(struct net_device *dev,
3843 struct nlattr *data[])
3845 struct macsec_secy *secy;
3846 struct macsec_tx_sc *tx_sc;
3848 secy = &macsec_priv(dev)->secy;
3849 tx_sc = &secy->tx_sc;
3851 if (data[IFLA_MACSEC_ENCODING_SA]) {
3852 struct macsec_tx_sa *tx_sa;
3854 tx_sc->encoding_sa = nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]);
3855 tx_sa = rtnl_dereference(tx_sc->sa[tx_sc->encoding_sa]);
3857 secy->operational = tx_sa && tx_sa->active;
3860 if (data[IFLA_MACSEC_ENCRYPT])
3861 tx_sc->encrypt = !!nla_get_u8(data[IFLA_MACSEC_ENCRYPT]);
3863 if (data[IFLA_MACSEC_PROTECT])
3864 secy->protect_frames = !!nla_get_u8(data[IFLA_MACSEC_PROTECT]);
3866 if (data[IFLA_MACSEC_INC_SCI])
3867 tx_sc->send_sci = !!nla_get_u8(data[IFLA_MACSEC_INC_SCI]);
3869 if (data[IFLA_MACSEC_ES])
3870 tx_sc->end_station = !!nla_get_u8(data[IFLA_MACSEC_ES]);
3872 if (data[IFLA_MACSEC_SCB])
3873 tx_sc->scb = !!nla_get_u8(data[IFLA_MACSEC_SCB]);
3875 if (data[IFLA_MACSEC_REPLAY_PROTECT])
3876 secy->replay_protect = !!nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT]);
3878 if (data[IFLA_MACSEC_VALIDATION])
3879 secy->validate_frames = nla_get_u8(data[IFLA_MACSEC_VALIDATION]);
3881 if (data[IFLA_MACSEC_CIPHER_SUITE]) {
3882 switch (nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE])) {
3883 case MACSEC_CIPHER_ID_GCM_AES_128:
3884 case MACSEC_DEFAULT_CIPHER_ID:
3885 secy->key_len = MACSEC_GCM_AES_128_SAK_LEN;
3888 case MACSEC_CIPHER_ID_GCM_AES_256:
3889 secy->key_len = MACSEC_GCM_AES_256_SAK_LEN;
3892 case MACSEC_CIPHER_ID_GCM_AES_XPN_128:
3893 secy->key_len = MACSEC_GCM_AES_128_SAK_LEN;
3896 case MACSEC_CIPHER_ID_GCM_AES_XPN_256:
3897 secy->key_len = MACSEC_GCM_AES_256_SAK_LEN;
3905 if (data[IFLA_MACSEC_WINDOW]) {
3906 secy->replay_window = nla_get_u32(data[IFLA_MACSEC_WINDOW]);
3908 /* IEEE 802.1AEbw-2013 10.7.8 - maximum replay window
3909 * for XPN cipher suites */
3911 secy->replay_window > MACSEC_XPN_MAX_REPLAY_WINDOW)
3918 static int macsec_changelink(struct net_device *dev, struct nlattr *tb[],
3919 struct nlattr *data[],
3920 struct netlink_ext_ack *extack)
3922 struct macsec_dev *macsec = macsec_priv(dev);
3923 bool macsec_offload_state_change = false;
3924 enum macsec_offload offload;
3925 struct macsec_tx_sc tx_sc;
3926 struct macsec_secy secy;
3932 if (data[IFLA_MACSEC_CIPHER_SUITE] ||
3933 data[IFLA_MACSEC_ICV_LEN] ||
3934 data[IFLA_MACSEC_SCI] ||
3935 data[IFLA_MACSEC_PORT])
3938 /* Keep a copy of unmodified secy and tx_sc, in case the offload
3939 * propagation fails, to revert macsec_changelink_common.
3941 memcpy(&secy, &macsec->secy, sizeof(secy));
3942 memcpy(&tx_sc, &macsec->secy.tx_sc, sizeof(tx_sc));
3944 ret = macsec_changelink_common(dev, data);
3948 if (data[IFLA_MACSEC_OFFLOAD]) {
3949 offload = nla_get_u8(data[IFLA_MACSEC_OFFLOAD]);
3950 if (macsec->offload != offload) {
3951 macsec_offload_state_change = true;
3952 ret = macsec_update_offload(dev, offload);
3958 /* If h/w offloading is available, propagate to the device */
3959 if (!macsec_offload_state_change && macsec_is_offloaded(macsec)) {
3960 const struct macsec_ops *ops;
3961 struct macsec_context ctx;
3963 ops = macsec_get_ops(netdev_priv(dev), &ctx);
3969 ctx.secy = &macsec->secy;
3970 ret = macsec_offload(ops->mdo_upd_secy, &ctx);
3978 memcpy(&macsec->secy.tx_sc, &tx_sc, sizeof(tx_sc));
3979 memcpy(&macsec->secy, &secy, sizeof(secy));
3984 static void macsec_del_dev(struct macsec_dev *macsec)
3988 while (macsec->secy.rx_sc) {
3989 struct macsec_rx_sc *rx_sc = rtnl_dereference(macsec->secy.rx_sc);
3991 rcu_assign_pointer(macsec->secy.rx_sc, rx_sc->next);
3995 for (i = 0; i < MACSEC_NUM_AN; i++) {
3996 struct macsec_tx_sa *sa = rtnl_dereference(macsec->secy.tx_sc.sa[i]);
3999 RCU_INIT_POINTER(macsec->secy.tx_sc.sa[i], NULL);
4005 static void macsec_common_dellink(struct net_device *dev, struct list_head *head)
4007 struct macsec_dev *macsec = macsec_priv(dev);
4008 struct net_device *real_dev = macsec->real_dev;
4010 /* If h/w offloading is available, propagate to the device */
4011 if (macsec_is_offloaded(macsec)) {
4012 const struct macsec_ops *ops;
4013 struct macsec_context ctx;
4015 ops = macsec_get_ops(netdev_priv(dev), &ctx);
4017 ctx.secy = &macsec->secy;
4018 macsec_offload(ops->mdo_del_secy, &ctx);
4022 unregister_netdevice_queue(dev, head);
4023 list_del_rcu(&macsec->secys);
4024 macsec_del_dev(macsec);
4025 netdev_upper_dev_unlink(real_dev, dev);
4027 macsec_generation++;
4030 static void macsec_dellink(struct net_device *dev, struct list_head *head)
4032 struct macsec_dev *macsec = macsec_priv(dev);
4033 struct net_device *real_dev = macsec->real_dev;
4034 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
4036 macsec_common_dellink(dev, head);
4038 if (list_empty(&rxd->secys)) {
4039 netdev_rx_handler_unregister(real_dev);
4044 static int register_macsec_dev(struct net_device *real_dev,
4045 struct net_device *dev)
4047 struct macsec_dev *macsec = macsec_priv(dev);
4048 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
4053 rxd = kmalloc(sizeof(*rxd), GFP_KERNEL);
4057 INIT_LIST_HEAD(&rxd->secys);
4059 err = netdev_rx_handler_register(real_dev, macsec_handle_frame,
4067 list_add_tail_rcu(&macsec->secys, &rxd->secys);
4071 static bool sci_exists(struct net_device *dev, sci_t sci)
4073 struct macsec_rxh_data *rxd = macsec_data_rtnl(dev);
4074 struct macsec_dev *macsec;
4076 list_for_each_entry(macsec, &rxd->secys, secys) {
4077 if (macsec->secy.sci == sci)
4084 static sci_t dev_to_sci(struct net_device *dev, __be16 port)
4086 return make_sci(dev->dev_addr, port);
4089 static int macsec_add_dev(struct net_device *dev, sci_t sci, u8 icv_len)
4091 struct macsec_dev *macsec = macsec_priv(dev);
4092 struct macsec_secy *secy = &macsec->secy;
4094 macsec->stats = netdev_alloc_pcpu_stats(struct pcpu_secy_stats);
4098 secy->tx_sc.stats = netdev_alloc_pcpu_stats(struct pcpu_tx_sc_stats);
4099 if (!secy->tx_sc.stats)
4102 secy->tx_sc.md_dst = metadata_dst_alloc(0, METADATA_MACSEC, GFP_KERNEL);
4103 if (!secy->tx_sc.md_dst)
4104 /* macsec and secy percpu stats will be freed when unregistering
4105 * net_device in macsec_free_netdev()
4109 if (sci == MACSEC_UNDEF_SCI)
4110 sci = dev_to_sci(dev, MACSEC_PORT_ES);
4113 secy->operational = true;
4114 secy->key_len = DEFAULT_SAK_LEN;
4115 secy->icv_len = icv_len;
4116 secy->validate_frames = MACSEC_VALIDATE_DEFAULT;
4117 secy->protect_frames = true;
4118 secy->replay_protect = false;
4119 secy->xpn = DEFAULT_XPN;
4122 secy->tx_sc.md_dst->u.macsec_info.sci = sci;
4123 secy->tx_sc.active = true;
4124 secy->tx_sc.encoding_sa = DEFAULT_ENCODING_SA;
4125 secy->tx_sc.encrypt = DEFAULT_ENCRYPT;
4126 secy->tx_sc.send_sci = DEFAULT_SEND_SCI;
4127 secy->tx_sc.end_station = false;
4128 secy->tx_sc.scb = false;
4133 static struct lock_class_key macsec_netdev_addr_lock_key;
4135 static int macsec_newlink(struct net *net, struct net_device *dev,
4136 struct nlattr *tb[], struct nlattr *data[],
4137 struct netlink_ext_ack *extack)
4139 struct macsec_dev *macsec = macsec_priv(dev);
4140 rx_handler_func_t *rx_handler;
4141 u8 icv_len = MACSEC_DEFAULT_ICV_LEN;
4142 struct net_device *real_dev;
4148 real_dev = __dev_get_by_index(net, nla_get_u32(tb[IFLA_LINK]));
4151 if (real_dev->type != ARPHRD_ETHER)
4154 dev->priv_flags |= IFF_MACSEC;
4156 macsec->real_dev = real_dev;
4158 if (data && data[IFLA_MACSEC_OFFLOAD])
4159 macsec->offload = nla_get_offload(data[IFLA_MACSEC_OFFLOAD]);
4161 /* MACsec offloading is off by default */
4162 macsec->offload = MACSEC_OFFLOAD_OFF;
4164 /* Check if the offloading mode is supported by the underlying layers */
4165 if (macsec->offload != MACSEC_OFFLOAD_OFF &&
4166 !macsec_check_offload(macsec->offload, macsec))
4169 /* send_sci must be set to true when transmit sci explicitly is set */
4170 if ((data && data[IFLA_MACSEC_SCI]) &&
4171 (data && data[IFLA_MACSEC_INC_SCI])) {
4172 u8 send_sci = !!nla_get_u8(data[IFLA_MACSEC_INC_SCI]);
4178 if (data && data[IFLA_MACSEC_ICV_LEN])
4179 icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]);
4180 mtu = real_dev->mtu - icv_len - macsec_extra_len(true);
4186 rx_handler = rtnl_dereference(real_dev->rx_handler);
4187 if (rx_handler && rx_handler != macsec_handle_frame)
4190 err = register_netdevice(dev);
4194 netdev_lockdep_set_classes(dev);
4195 lockdep_set_class(&dev->addr_list_lock,
4196 &macsec_netdev_addr_lock_key);
4198 err = netdev_upper_dev_link(real_dev, dev, extack);
4202 /* need to be already registered so that ->init has run and
4203 * the MAC addr is set
4205 if (data && data[IFLA_MACSEC_SCI])
4206 sci = nla_get_sci(data[IFLA_MACSEC_SCI]);
4207 else if (data && data[IFLA_MACSEC_PORT])
4208 sci = dev_to_sci(dev, nla_get_be16(data[IFLA_MACSEC_PORT]));
4210 sci = dev_to_sci(dev, MACSEC_PORT_ES);
4212 if (rx_handler && sci_exists(real_dev, sci)) {
4217 err = macsec_add_dev(dev, sci, icv_len);
4222 err = macsec_changelink_common(dev, data);
4227 /* If h/w offloading is available, propagate to the device */
4228 if (macsec_is_offloaded(macsec)) {
4229 const struct macsec_ops *ops;
4230 struct macsec_context ctx;
4232 ops = macsec_get_ops(macsec, &ctx);
4234 ctx.secy = &macsec->secy;
4235 err = macsec_offload(ops->mdo_add_secy, &ctx);
4239 macsec->insert_tx_tag =
4240 macsec_needs_tx_tag(macsec, ops);
4244 err = register_macsec_dev(real_dev, dev);
4248 netif_stacked_transfer_operstate(real_dev, dev);
4249 linkwatch_fire_event(dev);
4251 macsec_generation++;
4256 macsec_del_dev(macsec);
4258 netdev_upper_dev_unlink(real_dev, dev);
4260 unregister_netdevice(dev);
4264 static int macsec_validate_attr(struct nlattr *tb[], struct nlattr *data[],
4265 struct netlink_ext_ack *extack)
4267 u64 csid = MACSEC_DEFAULT_CIPHER_ID;
4268 u8 icv_len = MACSEC_DEFAULT_ICV_LEN;
4275 if (data[IFLA_MACSEC_CIPHER_SUITE])
4276 csid = nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE]);
4278 if (data[IFLA_MACSEC_ICV_LEN]) {
4279 icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]);
4280 if (icv_len != MACSEC_DEFAULT_ICV_LEN) {
4281 char dummy_key[DEFAULT_SAK_LEN] = { 0 };
4282 struct crypto_aead *dummy_tfm;
4284 dummy_tfm = macsec_alloc_tfm(dummy_key,
4287 if (IS_ERR(dummy_tfm))
4288 return PTR_ERR(dummy_tfm);
4289 crypto_free_aead(dummy_tfm);
4294 case MACSEC_CIPHER_ID_GCM_AES_128:
4295 case MACSEC_CIPHER_ID_GCM_AES_256:
4296 case MACSEC_CIPHER_ID_GCM_AES_XPN_128:
4297 case MACSEC_CIPHER_ID_GCM_AES_XPN_256:
4298 case MACSEC_DEFAULT_CIPHER_ID:
4299 if (icv_len < MACSEC_MIN_ICV_LEN ||
4300 icv_len > MACSEC_STD_ICV_LEN)
4307 if (data[IFLA_MACSEC_ENCODING_SA]) {
4308 if (nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]) >= MACSEC_NUM_AN)
4312 for (flag = IFLA_MACSEC_ENCODING_SA + 1;
4313 flag < IFLA_MACSEC_VALIDATION;
4316 if (nla_get_u8(data[flag]) > 1)
4321 es = data[IFLA_MACSEC_ES] ? nla_get_u8(data[IFLA_MACSEC_ES]) : false;
4322 sci = data[IFLA_MACSEC_INC_SCI] ? nla_get_u8(data[IFLA_MACSEC_INC_SCI]) : false;
4323 scb = data[IFLA_MACSEC_SCB] ? nla_get_u8(data[IFLA_MACSEC_SCB]) : false;
4325 if ((sci && (scb || es)) || (scb && es))
4328 if (data[IFLA_MACSEC_VALIDATION] &&
4329 nla_get_u8(data[IFLA_MACSEC_VALIDATION]) > MACSEC_VALIDATE_MAX)
4332 if ((data[IFLA_MACSEC_REPLAY_PROTECT] &&
4333 nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT])) &&
4334 !data[IFLA_MACSEC_WINDOW])
4340 static struct net *macsec_get_link_net(const struct net_device *dev)
4342 return dev_net(macsec_priv(dev)->real_dev);
4345 struct net_device *macsec_get_real_dev(const struct net_device *dev)
4347 return macsec_priv(dev)->real_dev;
4349 EXPORT_SYMBOL_GPL(macsec_get_real_dev);
4351 bool macsec_netdev_is_offloaded(struct net_device *dev)
4353 return macsec_is_offloaded(macsec_priv(dev));
4355 EXPORT_SYMBOL_GPL(macsec_netdev_is_offloaded);
4357 static size_t macsec_get_size(const struct net_device *dev)
4359 return nla_total_size_64bit(8) + /* IFLA_MACSEC_SCI */
4360 nla_total_size(1) + /* IFLA_MACSEC_ICV_LEN */
4361 nla_total_size_64bit(8) + /* IFLA_MACSEC_CIPHER_SUITE */
4362 nla_total_size(4) + /* IFLA_MACSEC_WINDOW */
4363 nla_total_size(1) + /* IFLA_MACSEC_ENCODING_SA */
4364 nla_total_size(1) + /* IFLA_MACSEC_ENCRYPT */
4365 nla_total_size(1) + /* IFLA_MACSEC_PROTECT */
4366 nla_total_size(1) + /* IFLA_MACSEC_INC_SCI */
4367 nla_total_size(1) + /* IFLA_MACSEC_ES */
4368 nla_total_size(1) + /* IFLA_MACSEC_SCB */
4369 nla_total_size(1) + /* IFLA_MACSEC_REPLAY_PROTECT */
4370 nla_total_size(1) + /* IFLA_MACSEC_VALIDATION */
4371 nla_total_size(1) + /* IFLA_MACSEC_OFFLOAD */
4375 static int macsec_fill_info(struct sk_buff *skb,
4376 const struct net_device *dev)
4378 struct macsec_tx_sc *tx_sc;
4379 struct macsec_dev *macsec;
4380 struct macsec_secy *secy;
4383 macsec = macsec_priv(dev);
4384 secy = &macsec->secy;
4385 tx_sc = &secy->tx_sc;
4387 switch (secy->key_len) {
4388 case MACSEC_GCM_AES_128_SAK_LEN:
4389 csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_128 : MACSEC_DEFAULT_CIPHER_ID;
4391 case MACSEC_GCM_AES_256_SAK_LEN:
4392 csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_256 : MACSEC_CIPHER_ID_GCM_AES_256;
4395 goto nla_put_failure;
4398 if (nla_put_sci(skb, IFLA_MACSEC_SCI, secy->sci,
4400 nla_put_u8(skb, IFLA_MACSEC_ICV_LEN, secy->icv_len) ||
4401 nla_put_u64_64bit(skb, IFLA_MACSEC_CIPHER_SUITE,
4402 csid, IFLA_MACSEC_PAD) ||
4403 nla_put_u8(skb, IFLA_MACSEC_ENCODING_SA, tx_sc->encoding_sa) ||
4404 nla_put_u8(skb, IFLA_MACSEC_ENCRYPT, tx_sc->encrypt) ||
4405 nla_put_u8(skb, IFLA_MACSEC_PROTECT, secy->protect_frames) ||
4406 nla_put_u8(skb, IFLA_MACSEC_INC_SCI, tx_sc->send_sci) ||
4407 nla_put_u8(skb, IFLA_MACSEC_ES, tx_sc->end_station) ||
4408 nla_put_u8(skb, IFLA_MACSEC_SCB, tx_sc->scb) ||
4409 nla_put_u8(skb, IFLA_MACSEC_REPLAY_PROTECT, secy->replay_protect) ||
4410 nla_put_u8(skb, IFLA_MACSEC_VALIDATION, secy->validate_frames) ||
4411 nla_put_u8(skb, IFLA_MACSEC_OFFLOAD, macsec->offload) ||
4413 goto nla_put_failure;
4415 if (secy->replay_protect) {
4416 if (nla_put_u32(skb, IFLA_MACSEC_WINDOW, secy->replay_window))
4417 goto nla_put_failure;
4426 static struct rtnl_link_ops macsec_link_ops __read_mostly = {
4428 .priv_size = sizeof(struct macsec_dev),
4429 .maxtype = IFLA_MACSEC_MAX,
4430 .policy = macsec_rtnl_policy,
4431 .setup = macsec_setup,
4432 .validate = macsec_validate_attr,
4433 .newlink = macsec_newlink,
4434 .changelink = macsec_changelink,
4435 .dellink = macsec_dellink,
4436 .get_size = macsec_get_size,
4437 .fill_info = macsec_fill_info,
4438 .get_link_net = macsec_get_link_net,
4441 static bool is_macsec_master(struct net_device *dev)
4443 return rcu_access_pointer(dev->rx_handler) == macsec_handle_frame;
4446 static int macsec_notify(struct notifier_block *this, unsigned long event,
4449 struct net_device *real_dev = netdev_notifier_info_to_dev(ptr);
4452 if (!is_macsec_master(real_dev))
4458 case NETDEV_CHANGE: {
4459 struct macsec_dev *m, *n;
4460 struct macsec_rxh_data *rxd;
4462 rxd = macsec_data_rtnl(real_dev);
4463 list_for_each_entry_safe(m, n, &rxd->secys, secys) {
4464 struct net_device *dev = m->secy.netdev;
4466 netif_stacked_transfer_operstate(real_dev, dev);
4470 case NETDEV_UNREGISTER: {
4471 struct macsec_dev *m, *n;
4472 struct macsec_rxh_data *rxd;
4474 rxd = macsec_data_rtnl(real_dev);
4475 list_for_each_entry_safe(m, n, &rxd->secys, secys) {
4476 macsec_common_dellink(m->secy.netdev, &head);
4479 netdev_rx_handler_unregister(real_dev);
4482 unregister_netdevice_many(&head);
4485 case NETDEV_CHANGEMTU: {
4486 struct macsec_dev *m;
4487 struct macsec_rxh_data *rxd;
4489 rxd = macsec_data_rtnl(real_dev);
4490 list_for_each_entry(m, &rxd->secys, secys) {
4491 struct net_device *dev = m->secy.netdev;
4492 unsigned int mtu = real_dev->mtu - (m->secy.icv_len +
4493 macsec_extra_len(true));
4496 dev_set_mtu(dev, mtu);
4504 static struct notifier_block macsec_notifier = {
4505 .notifier_call = macsec_notify,
4508 static int __init macsec_init(void)
4512 pr_info("MACsec IEEE 802.1AE\n");
4513 err = register_netdevice_notifier(&macsec_notifier);
4517 err = rtnl_link_register(&macsec_link_ops);
4521 err = genl_register_family(&macsec_fam);
4528 rtnl_link_unregister(&macsec_link_ops);
4530 unregister_netdevice_notifier(&macsec_notifier);
4534 static void __exit macsec_exit(void)
4536 genl_unregister_family(&macsec_fam);
4537 rtnl_link_unregister(&macsec_link_ops);
4538 unregister_netdevice_notifier(&macsec_notifier);
4542 module_init(macsec_init);
4543 module_exit(macsec_exit);
4545 MODULE_ALIAS_RTNL_LINK("macsec");
4546 MODULE_ALIAS_GENL_FAMILY("macsec");
4548 MODULE_DESCRIPTION("MACsec IEEE 802.1AE");
4549 MODULE_LICENSE("GPL v2");