1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * drivers/net/macsec.c - MACsec device
5 * Copyright (c) 2015 Sabrina Dubroca <sd@queasysnail.net>
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
98 struct macsec_secy secy;
99 struct net_device *real_dev;
100 netdevice_tracker dev_tracker;
101 struct pcpu_secy_stats __percpu *stats;
102 struct list_head secys;
103 struct gro_cells gro_cells;
104 enum macsec_offload offload;
108 * struct macsec_rxh_data - rx_handler private argument
109 * @secys: linked list of SecY's on this underlying device
111 struct macsec_rxh_data {
112 struct list_head secys;
115 static struct macsec_dev *macsec_priv(const struct net_device *dev)
117 return (struct macsec_dev *)netdev_priv(dev);
120 static struct macsec_rxh_data *macsec_data_rcu(const struct net_device *dev)
122 return rcu_dereference_bh(dev->rx_handler_data);
125 static struct macsec_rxh_data *macsec_data_rtnl(const struct net_device *dev)
127 return rtnl_dereference(dev->rx_handler_data);
131 struct aead_request *req;
133 struct macsec_tx_sa *tx_sa;
134 struct macsec_rx_sa *rx_sa;
141 static struct macsec_rx_sa *macsec_rxsa_get(struct macsec_rx_sa __rcu *ptr)
143 struct macsec_rx_sa *sa = rcu_dereference_bh(ptr);
145 if (!sa || !sa->active)
148 if (!refcount_inc_not_zero(&sa->refcnt))
154 static struct macsec_rx_sa *macsec_active_rxsa_get(struct macsec_rx_sc *rx_sc)
156 struct macsec_rx_sa *sa = NULL;
159 for (an = 0; an < MACSEC_NUM_AN; an++) {
160 sa = macsec_rxsa_get(rx_sc->sa[an]);
167 static void free_rx_sc_rcu(struct rcu_head *head)
169 struct macsec_rx_sc *rx_sc = container_of(head, struct macsec_rx_sc, rcu_head);
171 free_percpu(rx_sc->stats);
175 static struct macsec_rx_sc *macsec_rxsc_get(struct macsec_rx_sc *sc)
177 return refcount_inc_not_zero(&sc->refcnt) ? sc : NULL;
180 static void macsec_rxsc_put(struct macsec_rx_sc *sc)
182 if (refcount_dec_and_test(&sc->refcnt))
183 call_rcu(&sc->rcu_head, free_rx_sc_rcu);
186 static void free_rxsa(struct rcu_head *head)
188 struct macsec_rx_sa *sa = container_of(head, struct macsec_rx_sa, rcu);
190 crypto_free_aead(sa->key.tfm);
191 free_percpu(sa->stats);
195 static void macsec_rxsa_put(struct macsec_rx_sa *sa)
197 if (refcount_dec_and_test(&sa->refcnt))
198 call_rcu(&sa->rcu, free_rxsa);
201 static struct macsec_tx_sa *macsec_txsa_get(struct macsec_tx_sa __rcu *ptr)
203 struct macsec_tx_sa *sa = rcu_dereference_bh(ptr);
205 if (!sa || !sa->active)
208 if (!refcount_inc_not_zero(&sa->refcnt))
214 static void free_txsa(struct rcu_head *head)
216 struct macsec_tx_sa *sa = container_of(head, struct macsec_tx_sa, rcu);
218 crypto_free_aead(sa->key.tfm);
219 free_percpu(sa->stats);
223 static void macsec_txsa_put(struct macsec_tx_sa *sa)
225 if (refcount_dec_and_test(&sa->refcnt))
226 call_rcu(&sa->rcu, free_txsa);
229 static struct macsec_cb *macsec_skb_cb(struct sk_buff *skb)
231 BUILD_BUG_ON(sizeof(struct macsec_cb) > sizeof(skb->cb));
232 return (struct macsec_cb *)skb->cb;
235 #define MACSEC_PORT_SCB (0x0000)
236 #define MACSEC_UNDEF_SCI ((__force sci_t)0xffffffffffffffffULL)
237 #define MACSEC_UNDEF_SSCI ((__force ssci_t)0xffffffff)
239 #define MACSEC_GCM_AES_128_SAK_LEN 16
240 #define MACSEC_GCM_AES_256_SAK_LEN 32
242 #define DEFAULT_SAK_LEN MACSEC_GCM_AES_128_SAK_LEN
243 #define DEFAULT_XPN false
244 #define DEFAULT_SEND_SCI true
245 #define DEFAULT_ENCRYPT false
246 #define DEFAULT_ENCODING_SA 0
247 #define MACSEC_XPN_MAX_REPLAY_WINDOW (((1 << 30) - 1))
249 static sci_t make_sci(const u8 *addr, __be16 port)
253 memcpy(&sci, addr, ETH_ALEN);
254 memcpy(((char *)&sci) + ETH_ALEN, &port, sizeof(port));
259 static sci_t macsec_frame_sci(struct macsec_eth_header *hdr, bool sci_present)
264 memcpy(&sci, hdr->secure_channel_id,
265 sizeof(hdr->secure_channel_id));
267 sci = make_sci(hdr->eth.h_source, MACSEC_PORT_ES);
272 static unsigned int macsec_sectag_len(bool sci_present)
274 return MACSEC_TAG_LEN + (sci_present ? MACSEC_SCI_LEN : 0);
277 static unsigned int macsec_hdr_len(bool sci_present)
279 return macsec_sectag_len(sci_present) + ETH_HLEN;
282 static unsigned int macsec_extra_len(bool sci_present)
284 return macsec_sectag_len(sci_present) + sizeof(__be16);
287 /* Fill SecTAG according to IEEE 802.1AE-2006 10.5.3 */
288 static void macsec_fill_sectag(struct macsec_eth_header *h,
289 const struct macsec_secy *secy, u32 pn,
292 const struct macsec_tx_sc *tx_sc = &secy->tx_sc;
294 memset(&h->tci_an, 0, macsec_sectag_len(sci_present));
295 h->eth.h_proto = htons(ETH_P_MACSEC);
298 h->tci_an |= MACSEC_TCI_SC;
299 memcpy(&h->secure_channel_id, &secy->sci,
300 sizeof(h->secure_channel_id));
302 if (tx_sc->end_station)
303 h->tci_an |= MACSEC_TCI_ES;
305 h->tci_an |= MACSEC_TCI_SCB;
308 h->packet_number = htonl(pn);
310 /* with GCM, C/E clear for !encrypt, both set for encrypt */
312 h->tci_an |= MACSEC_TCI_CONFID;
313 else if (secy->icv_len != MACSEC_DEFAULT_ICV_LEN)
314 h->tci_an |= MACSEC_TCI_C;
316 h->tci_an |= tx_sc->encoding_sa;
319 static void macsec_set_shortlen(struct macsec_eth_header *h, size_t data_len)
321 if (data_len < MIN_NON_SHORT_LEN)
322 h->short_length = data_len;
325 /* Checks if a MACsec interface is being offloaded to an hardware engine */
326 static bool macsec_is_offloaded(struct macsec_dev *macsec)
328 if (macsec->offload == MACSEC_OFFLOAD_MAC ||
329 macsec->offload == MACSEC_OFFLOAD_PHY)
335 /* Checks if underlying layers implement MACsec offloading functions. */
336 static bool macsec_check_offload(enum macsec_offload offload,
337 struct macsec_dev *macsec)
339 if (!macsec || !macsec->real_dev)
342 if (offload == MACSEC_OFFLOAD_PHY)
343 return macsec->real_dev->phydev &&
344 macsec->real_dev->phydev->macsec_ops;
345 else if (offload == MACSEC_OFFLOAD_MAC)
346 return macsec->real_dev->features & NETIF_F_HW_MACSEC &&
347 macsec->real_dev->macsec_ops;
352 static const struct macsec_ops *__macsec_get_ops(enum macsec_offload offload,
353 struct macsec_dev *macsec,
354 struct macsec_context *ctx)
357 memset(ctx, 0, sizeof(*ctx));
358 ctx->offload = offload;
360 if (offload == MACSEC_OFFLOAD_PHY)
361 ctx->phydev = macsec->real_dev->phydev;
362 else if (offload == MACSEC_OFFLOAD_MAC)
363 ctx->netdev = macsec->real_dev;
366 if (offload == MACSEC_OFFLOAD_PHY)
367 return macsec->real_dev->phydev->macsec_ops;
369 return macsec->real_dev->macsec_ops;
372 /* Returns a pointer to the MACsec ops struct if any and updates the MACsec
373 * context device reference if provided.
375 static const struct macsec_ops *macsec_get_ops(struct macsec_dev *macsec,
376 struct macsec_context *ctx)
378 if (!macsec_check_offload(macsec->offload, macsec))
381 return __macsec_get_ops(macsec->offload, macsec, ctx);
384 /* validate MACsec packet according to IEEE 802.1AE-2018 9.12 */
385 static bool macsec_validate_skb(struct sk_buff *skb, u16 icv_len, bool xpn)
387 struct macsec_eth_header *h = (struct macsec_eth_header *)skb->data;
388 int len = skb->len - 2 * ETH_ALEN;
389 int extra_len = macsec_extra_len(!!(h->tci_an & MACSEC_TCI_SC)) + icv_len;
391 /* a) It comprises at least 17 octets */
395 /* b) MACsec EtherType: already checked */
397 /* c) V bit is clear */
398 if (h->tci_an & MACSEC_TCI_VERSION)
401 /* d) ES or SCB => !SC */
402 if ((h->tci_an & MACSEC_TCI_ES || h->tci_an & MACSEC_TCI_SCB) &&
403 (h->tci_an & MACSEC_TCI_SC))
406 /* e) Bits 7 and 8 of octet 4 of the SecTAG are clear */
410 /* rx.pn != 0 if not XPN (figure 10-5 with 802.11AEbw-2013 amendment) */
411 if (!h->packet_number && !xpn)
414 /* length check, f) g) h) i) */
416 return len == extra_len + h->short_length;
417 return len >= extra_len + MIN_NON_SHORT_LEN;
420 #define MACSEC_NEEDED_HEADROOM (macsec_extra_len(true))
421 #define MACSEC_NEEDED_TAILROOM MACSEC_STD_ICV_LEN
423 static void macsec_fill_iv_xpn(unsigned char *iv, ssci_t ssci, u64 pn,
426 struct gcm_iv_xpn *gcm_iv = (struct gcm_iv_xpn *)iv;
428 gcm_iv->ssci = ssci ^ salt.ssci;
429 gcm_iv->pn = cpu_to_be64(pn) ^ salt.pn;
432 static void macsec_fill_iv(unsigned char *iv, sci_t sci, u32 pn)
434 struct gcm_iv *gcm_iv = (struct gcm_iv *)iv;
437 gcm_iv->pn = htonl(pn);
440 static struct macsec_eth_header *macsec_ethhdr(struct sk_buff *skb)
442 return (struct macsec_eth_header *)skb_mac_header(skb);
445 static void __macsec_pn_wrapped(struct macsec_secy *secy,
446 struct macsec_tx_sa *tx_sa)
448 pr_debug("PN wrapped, transitioning to !oper\n");
449 tx_sa->active = false;
450 if (secy->protect_frames)
451 secy->operational = false;
454 void macsec_pn_wrapped(struct macsec_secy *secy, struct macsec_tx_sa *tx_sa)
456 spin_lock_bh(&tx_sa->lock);
457 __macsec_pn_wrapped(secy, tx_sa);
458 spin_unlock_bh(&tx_sa->lock);
460 EXPORT_SYMBOL_GPL(macsec_pn_wrapped);
462 static pn_t tx_sa_update_pn(struct macsec_tx_sa *tx_sa,
463 struct macsec_secy *secy)
467 spin_lock_bh(&tx_sa->lock);
469 pn = tx_sa->next_pn_halves;
473 tx_sa->next_pn_halves.lower++;
475 if (tx_sa->next_pn == 0)
476 __macsec_pn_wrapped(secy, tx_sa);
477 spin_unlock_bh(&tx_sa->lock);
482 static void macsec_encrypt_finish(struct sk_buff *skb, struct net_device *dev)
484 struct macsec_dev *macsec = netdev_priv(dev);
486 skb->dev = macsec->real_dev;
487 skb_reset_mac_header(skb);
488 skb->protocol = eth_hdr(skb)->h_proto;
491 static unsigned int macsec_msdu_len(struct sk_buff *skb)
493 struct macsec_dev *macsec = macsec_priv(skb->dev);
494 struct macsec_secy *secy = &macsec->secy;
495 bool sci_present = macsec_skb_cb(skb)->has_sci;
497 return skb->len - macsec_hdr_len(sci_present) - secy->icv_len;
500 static void macsec_count_tx(struct sk_buff *skb, struct macsec_tx_sc *tx_sc,
501 struct macsec_tx_sa *tx_sa)
503 unsigned int msdu_len = macsec_msdu_len(skb);
504 struct pcpu_tx_sc_stats *txsc_stats = this_cpu_ptr(tx_sc->stats);
506 u64_stats_update_begin(&txsc_stats->syncp);
507 if (tx_sc->encrypt) {
508 txsc_stats->stats.OutOctetsEncrypted += msdu_len;
509 txsc_stats->stats.OutPktsEncrypted++;
510 this_cpu_inc(tx_sa->stats->OutPktsEncrypted);
512 txsc_stats->stats.OutOctetsProtected += msdu_len;
513 txsc_stats->stats.OutPktsProtected++;
514 this_cpu_inc(tx_sa->stats->OutPktsProtected);
516 u64_stats_update_end(&txsc_stats->syncp);
519 static void count_tx(struct net_device *dev, int ret, int len)
521 if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
522 struct pcpu_sw_netstats *stats = this_cpu_ptr(dev->tstats);
524 u64_stats_update_begin(&stats->syncp);
525 u64_stats_inc(&stats->tx_packets);
526 u64_stats_add(&stats->tx_bytes, len);
527 u64_stats_update_end(&stats->syncp);
531 static void macsec_encrypt_done(void *data, int err)
533 struct sk_buff *skb = data;
534 struct net_device *dev = skb->dev;
535 struct macsec_dev *macsec = macsec_priv(dev);
536 struct macsec_tx_sa *sa = macsec_skb_cb(skb)->tx_sa;
539 aead_request_free(macsec_skb_cb(skb)->req);
542 macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa);
543 /* packet is encrypted/protected so tx_bytes must be calculated */
544 len = macsec_msdu_len(skb) + 2 * ETH_ALEN;
545 macsec_encrypt_finish(skb, dev);
546 ret = dev_queue_xmit(skb);
547 count_tx(dev, ret, len);
548 rcu_read_unlock_bh();
554 static struct aead_request *macsec_alloc_req(struct crypto_aead *tfm,
556 struct scatterlist **sg,
559 size_t size, iv_offset, sg_offset;
560 struct aead_request *req;
563 size = sizeof(struct aead_request) + crypto_aead_reqsize(tfm);
565 size += GCM_AES_IV_LEN;
567 size = ALIGN(size, __alignof__(struct scatterlist));
569 size += sizeof(struct scatterlist) * num_frags;
571 tmp = kmalloc(size, GFP_ATOMIC);
575 *iv = (unsigned char *)(tmp + iv_offset);
576 *sg = (struct scatterlist *)(tmp + sg_offset);
579 aead_request_set_tfm(req, tfm);
584 static struct sk_buff *macsec_encrypt(struct sk_buff *skb,
585 struct net_device *dev)
588 struct scatterlist *sg;
589 struct sk_buff *trailer;
592 struct macsec_eth_header *hh;
593 size_t unprotected_len;
594 struct aead_request *req;
595 struct macsec_secy *secy;
596 struct macsec_tx_sc *tx_sc;
597 struct macsec_tx_sa *tx_sa;
598 struct macsec_dev *macsec = macsec_priv(dev);
602 secy = &macsec->secy;
603 tx_sc = &secy->tx_sc;
605 /* 10.5.1 TX SA assignment */
606 tx_sa = macsec_txsa_get(tx_sc->sa[tx_sc->encoding_sa]);
608 secy->operational = false;
610 return ERR_PTR(-EINVAL);
613 if (unlikely(skb_headroom(skb) < MACSEC_NEEDED_HEADROOM ||
614 skb_tailroom(skb) < MACSEC_NEEDED_TAILROOM)) {
615 struct sk_buff *nskb = skb_copy_expand(skb,
616 MACSEC_NEEDED_HEADROOM,
617 MACSEC_NEEDED_TAILROOM,
623 macsec_txsa_put(tx_sa);
625 return ERR_PTR(-ENOMEM);
628 skb = skb_unshare(skb, GFP_ATOMIC);
630 macsec_txsa_put(tx_sa);
631 return ERR_PTR(-ENOMEM);
635 unprotected_len = skb->len;
637 sci_present = macsec_send_sci(secy);
638 hh = skb_push(skb, macsec_extra_len(sci_present));
639 memmove(hh, eth, 2 * ETH_ALEN);
641 pn = tx_sa_update_pn(tx_sa, secy);
642 if (pn.full64 == 0) {
643 macsec_txsa_put(tx_sa);
645 return ERR_PTR(-ENOLINK);
647 macsec_fill_sectag(hh, secy, pn.lower, sci_present);
648 macsec_set_shortlen(hh, unprotected_len - 2 * ETH_ALEN);
650 skb_put(skb, secy->icv_len);
652 if (skb->len - ETH_HLEN > macsec_priv(dev)->real_dev->mtu) {
653 struct pcpu_secy_stats *secy_stats = this_cpu_ptr(macsec->stats);
655 u64_stats_update_begin(&secy_stats->syncp);
656 secy_stats->stats.OutPktsTooLong++;
657 u64_stats_update_end(&secy_stats->syncp);
659 macsec_txsa_put(tx_sa);
661 return ERR_PTR(-EINVAL);
664 ret = skb_cow_data(skb, 0, &trailer);
665 if (unlikely(ret < 0)) {
666 macsec_txsa_put(tx_sa);
671 req = macsec_alloc_req(tx_sa->key.tfm, &iv, &sg, ret);
673 macsec_txsa_put(tx_sa);
675 return ERR_PTR(-ENOMEM);
679 macsec_fill_iv_xpn(iv, tx_sa->ssci, pn.full64, tx_sa->key.salt);
681 macsec_fill_iv(iv, secy->sci, pn.lower);
683 sg_init_table(sg, ret);
684 ret = skb_to_sgvec(skb, sg, 0, skb->len);
685 if (unlikely(ret < 0)) {
686 aead_request_free(req);
687 macsec_txsa_put(tx_sa);
692 if (tx_sc->encrypt) {
693 int len = skb->len - macsec_hdr_len(sci_present) -
695 aead_request_set_crypt(req, sg, sg, len, iv);
696 aead_request_set_ad(req, macsec_hdr_len(sci_present));
698 aead_request_set_crypt(req, sg, sg, 0, iv);
699 aead_request_set_ad(req, skb->len - secy->icv_len);
702 macsec_skb_cb(skb)->req = req;
703 macsec_skb_cb(skb)->tx_sa = tx_sa;
704 macsec_skb_cb(skb)->has_sci = sci_present;
705 aead_request_set_callback(req, 0, macsec_encrypt_done, skb);
708 ret = crypto_aead_encrypt(req);
709 if (ret == -EINPROGRESS) {
711 } else if (ret != 0) {
714 aead_request_free(req);
715 macsec_txsa_put(tx_sa);
716 return ERR_PTR(-EINVAL);
720 aead_request_free(req);
721 macsec_txsa_put(tx_sa);
726 static bool macsec_post_decrypt(struct sk_buff *skb, struct macsec_secy *secy, u32 pn)
728 struct macsec_rx_sa *rx_sa = macsec_skb_cb(skb)->rx_sa;
729 struct pcpu_rx_sc_stats *rxsc_stats = this_cpu_ptr(rx_sa->sc->stats);
730 struct macsec_eth_header *hdr = macsec_ethhdr(skb);
733 spin_lock(&rx_sa->lock);
734 if (rx_sa->next_pn_halves.lower >= secy->replay_window)
735 lowest_pn = rx_sa->next_pn_halves.lower - secy->replay_window;
737 /* Now perform replay protection check again
738 * (see IEEE 802.1AE-2006 figure 10-5)
740 if (secy->replay_protect && pn < lowest_pn &&
741 (!secy->xpn || pn_same_half(pn, lowest_pn))) {
742 spin_unlock(&rx_sa->lock);
743 u64_stats_update_begin(&rxsc_stats->syncp);
744 rxsc_stats->stats.InPktsLate++;
745 u64_stats_update_end(&rxsc_stats->syncp);
746 DEV_STATS_INC(secy->netdev, rx_dropped);
750 if (secy->validate_frames != MACSEC_VALIDATE_DISABLED) {
751 unsigned int msdu_len = macsec_msdu_len(skb);
752 u64_stats_update_begin(&rxsc_stats->syncp);
753 if (hdr->tci_an & MACSEC_TCI_E)
754 rxsc_stats->stats.InOctetsDecrypted += msdu_len;
756 rxsc_stats->stats.InOctetsValidated += msdu_len;
757 u64_stats_update_end(&rxsc_stats->syncp);
760 if (!macsec_skb_cb(skb)->valid) {
761 spin_unlock(&rx_sa->lock);
764 if (hdr->tci_an & MACSEC_TCI_C ||
765 secy->validate_frames == MACSEC_VALIDATE_STRICT) {
766 u64_stats_update_begin(&rxsc_stats->syncp);
767 rxsc_stats->stats.InPktsNotValid++;
768 u64_stats_update_end(&rxsc_stats->syncp);
769 this_cpu_inc(rx_sa->stats->InPktsNotValid);
770 DEV_STATS_INC(secy->netdev, rx_errors);
774 u64_stats_update_begin(&rxsc_stats->syncp);
775 if (secy->validate_frames == MACSEC_VALIDATE_CHECK) {
776 rxsc_stats->stats.InPktsInvalid++;
777 this_cpu_inc(rx_sa->stats->InPktsInvalid);
778 } else if (pn < lowest_pn) {
779 rxsc_stats->stats.InPktsDelayed++;
781 rxsc_stats->stats.InPktsUnchecked++;
783 u64_stats_update_end(&rxsc_stats->syncp);
785 u64_stats_update_begin(&rxsc_stats->syncp);
786 if (pn < lowest_pn) {
787 rxsc_stats->stats.InPktsDelayed++;
789 rxsc_stats->stats.InPktsOK++;
790 this_cpu_inc(rx_sa->stats->InPktsOK);
792 u64_stats_update_end(&rxsc_stats->syncp);
794 // Instead of "pn >=" - to support pn overflow in xpn
795 if (pn + 1 > rx_sa->next_pn_halves.lower) {
796 rx_sa->next_pn_halves.lower = pn + 1;
797 } else if (secy->xpn &&
798 !pn_same_half(pn, rx_sa->next_pn_halves.lower)) {
799 rx_sa->next_pn_halves.upper++;
800 rx_sa->next_pn_halves.lower = pn + 1;
803 spin_unlock(&rx_sa->lock);
809 static void macsec_reset_skb(struct sk_buff *skb, struct net_device *dev)
811 skb->pkt_type = PACKET_HOST;
812 skb->protocol = eth_type_trans(skb, dev);
814 skb_reset_network_header(skb);
815 if (!skb_transport_header_was_set(skb))
816 skb_reset_transport_header(skb);
817 skb_reset_mac_len(skb);
820 static void macsec_finalize_skb(struct sk_buff *skb, u8 icv_len, u8 hdr_len)
822 skb->ip_summed = CHECKSUM_NONE;
823 memmove(skb->data + hdr_len, skb->data, 2 * ETH_ALEN);
824 skb_pull(skb, hdr_len);
825 pskb_trim_unique(skb, skb->len - icv_len);
828 static void count_rx(struct net_device *dev, int len)
830 struct pcpu_sw_netstats *stats = this_cpu_ptr(dev->tstats);
832 u64_stats_update_begin(&stats->syncp);
833 u64_stats_inc(&stats->rx_packets);
834 u64_stats_add(&stats->rx_bytes, len);
835 u64_stats_update_end(&stats->syncp);
838 static void macsec_decrypt_done(void *data, int err)
840 struct sk_buff *skb = data;
841 struct net_device *dev = skb->dev;
842 struct macsec_dev *macsec = macsec_priv(dev);
843 struct macsec_rx_sa *rx_sa = macsec_skb_cb(skb)->rx_sa;
844 struct macsec_rx_sc *rx_sc = rx_sa->sc;
848 aead_request_free(macsec_skb_cb(skb)->req);
851 macsec_skb_cb(skb)->valid = true;
854 pn = ntohl(macsec_ethhdr(skb)->packet_number);
855 if (!macsec_post_decrypt(skb, &macsec->secy, pn)) {
856 rcu_read_unlock_bh();
861 macsec_finalize_skb(skb, macsec->secy.icv_len,
862 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
864 macsec_reset_skb(skb, macsec->secy.netdev);
866 if (gro_cells_receive(&macsec->gro_cells, skb) == NET_RX_SUCCESS)
869 rcu_read_unlock_bh();
872 macsec_rxsa_put(rx_sa);
873 macsec_rxsc_put(rx_sc);
877 static struct sk_buff *macsec_decrypt(struct sk_buff *skb,
878 struct net_device *dev,
879 struct macsec_rx_sa *rx_sa,
881 struct macsec_secy *secy)
884 struct scatterlist *sg;
885 struct sk_buff *trailer;
887 struct aead_request *req;
888 struct macsec_eth_header *hdr;
890 u16 icv_len = secy->icv_len;
892 macsec_skb_cb(skb)->valid = false;
893 skb = skb_share_check(skb, GFP_ATOMIC);
895 return ERR_PTR(-ENOMEM);
897 ret = skb_cow_data(skb, 0, &trailer);
898 if (unlikely(ret < 0)) {
902 req = macsec_alloc_req(rx_sa->key.tfm, &iv, &sg, ret);
905 return ERR_PTR(-ENOMEM);
908 hdr = (struct macsec_eth_header *)skb->data;
909 hdr_pn = ntohl(hdr->packet_number);
912 pn_t recovered_pn = rx_sa->next_pn_halves;
914 recovered_pn.lower = hdr_pn;
915 if (hdr_pn < rx_sa->next_pn_halves.lower &&
916 !pn_same_half(hdr_pn, rx_sa->next_pn_halves.lower))
917 recovered_pn.upper++;
919 macsec_fill_iv_xpn(iv, rx_sa->ssci, recovered_pn.full64,
922 macsec_fill_iv(iv, sci, hdr_pn);
925 sg_init_table(sg, ret);
926 ret = skb_to_sgvec(skb, sg, 0, skb->len);
927 if (unlikely(ret < 0)) {
928 aead_request_free(req);
933 if (hdr->tci_an & MACSEC_TCI_E) {
934 /* confidentiality: ethernet + macsec header
935 * authenticated, encrypted payload
937 int len = skb->len - macsec_hdr_len(macsec_skb_cb(skb)->has_sci);
939 aead_request_set_crypt(req, sg, sg, len, iv);
940 aead_request_set_ad(req, macsec_hdr_len(macsec_skb_cb(skb)->has_sci));
941 skb = skb_unshare(skb, GFP_ATOMIC);
943 aead_request_free(req);
944 return ERR_PTR(-ENOMEM);
947 /* integrity only: all headers + data authenticated */
948 aead_request_set_crypt(req, sg, sg, icv_len, iv);
949 aead_request_set_ad(req, skb->len - icv_len);
952 macsec_skb_cb(skb)->req = req;
954 aead_request_set_callback(req, 0, macsec_decrypt_done, skb);
957 ret = crypto_aead_decrypt(req);
958 if (ret == -EINPROGRESS) {
960 } else if (ret != 0) {
961 /* decryption/authentication failed
962 * 10.6 if validateFrames is disabled, deliver anyway
964 if (ret != -EBADMSG) {
969 macsec_skb_cb(skb)->valid = true;
973 aead_request_free(req);
978 static struct macsec_rx_sc *find_rx_sc(struct macsec_secy *secy, sci_t sci)
980 struct macsec_rx_sc *rx_sc;
982 for_each_rxsc(secy, rx_sc) {
983 if (rx_sc->sci == sci)
990 static struct macsec_rx_sc *find_rx_sc_rtnl(struct macsec_secy *secy, sci_t sci)
992 struct macsec_rx_sc *rx_sc;
994 for_each_rxsc_rtnl(secy, rx_sc) {
995 if (rx_sc->sci == sci)
1002 static enum rx_handler_result handle_not_macsec(struct sk_buff *skb)
1004 /* Deliver to the uncontrolled port by default */
1005 enum rx_handler_result ret = RX_HANDLER_PASS;
1006 struct ethhdr *hdr = eth_hdr(skb);
1007 struct metadata_dst *md_dst;
1008 struct macsec_rxh_data *rxd;
1009 struct macsec_dev *macsec;
1012 rxd = macsec_data_rcu(skb->dev);
1013 md_dst = skb_metadata_dst(skb);
1015 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1016 struct sk_buff *nskb;
1017 struct pcpu_secy_stats *secy_stats = this_cpu_ptr(macsec->stats);
1018 struct net_device *ndev = macsec->secy.netdev;
1020 /* If h/w offloading is enabled, HW decodes frames and strips
1021 * the SecTAG, so we have to deduce which port to deliver to.
1023 if (macsec_is_offloaded(macsec) && netif_running(ndev)) {
1024 struct macsec_rx_sc *rx_sc = NULL;
1026 if (md_dst && md_dst->type == METADATA_MACSEC)
1027 rx_sc = find_rx_sc(&macsec->secy, md_dst->u.macsec_info.sci);
1029 if (md_dst && md_dst->type == METADATA_MACSEC && !rx_sc)
1032 if (ether_addr_equal_64bits(hdr->h_dest,
1034 /* exact match, divert skb to this port */
1036 skb->pkt_type = PACKET_HOST;
1037 ret = RX_HANDLER_ANOTHER;
1039 } else if (is_multicast_ether_addr_64bits(
1041 /* multicast frame, deliver on this port too */
1042 nskb = skb_clone(skb, GFP_ATOMIC);
1047 if (ether_addr_equal_64bits(hdr->h_dest,
1049 nskb->pkt_type = PACKET_BROADCAST;
1051 nskb->pkt_type = PACKET_MULTICAST;
1054 } else if (rx_sc || ndev->flags & IFF_PROMISC) {
1056 skb->pkt_type = PACKET_HOST;
1057 ret = RX_HANDLER_ANOTHER;
1064 /* 10.6 If the management control validateFrames is not
1065 * Strict, frames without a SecTAG are received, counted, and
1066 * delivered to the Controlled Port
1068 if (macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) {
1069 u64_stats_update_begin(&secy_stats->syncp);
1070 secy_stats->stats.InPktsNoTag++;
1071 u64_stats_update_end(&secy_stats->syncp);
1072 DEV_STATS_INC(macsec->secy.netdev, rx_dropped);
1076 /* deliver on this port */
1077 nskb = skb_clone(skb, GFP_ATOMIC);
1083 if (__netif_rx(nskb) == NET_RX_SUCCESS) {
1084 u64_stats_update_begin(&secy_stats->syncp);
1085 secy_stats->stats.InPktsUntagged++;
1086 u64_stats_update_end(&secy_stats->syncp);
1095 static rx_handler_result_t macsec_handle_frame(struct sk_buff **pskb)
1097 struct sk_buff *skb = *pskb;
1098 struct net_device *dev = skb->dev;
1099 struct macsec_eth_header *hdr;
1100 struct macsec_secy *secy = NULL;
1101 struct macsec_rx_sc *rx_sc;
1102 struct macsec_rx_sa *rx_sa;
1103 struct macsec_rxh_data *rxd;
1104 struct macsec_dev *macsec;
1109 struct pcpu_rx_sc_stats *rxsc_stats;
1110 struct pcpu_secy_stats *secy_stats;
1114 if (skb_headroom(skb) < ETH_HLEN)
1117 hdr = macsec_ethhdr(skb);
1118 if (hdr->eth.h_proto != htons(ETH_P_MACSEC))
1119 return handle_not_macsec(skb);
1121 skb = skb_unshare(skb, GFP_ATOMIC);
1124 return RX_HANDLER_CONSUMED;
1126 pulled_sci = pskb_may_pull(skb, macsec_extra_len(true));
1128 if (!pskb_may_pull(skb, macsec_extra_len(false)))
1132 hdr = macsec_ethhdr(skb);
1134 /* Frames with a SecTAG that has the TCI E bit set but the C
1135 * bit clear are discarded, as this reserved encoding is used
1136 * to identify frames with a SecTAG that are not to be
1137 * delivered to the Controlled Port.
1139 if ((hdr->tci_an & (MACSEC_TCI_C | MACSEC_TCI_E)) == MACSEC_TCI_E)
1140 return RX_HANDLER_PASS;
1142 /* now, pull the extra length */
1143 if (hdr->tci_an & MACSEC_TCI_SC) {
1148 /* ethernet header is part of crypto processing */
1149 skb_push(skb, ETH_HLEN);
1151 macsec_skb_cb(skb)->has_sci = !!(hdr->tci_an & MACSEC_TCI_SC);
1152 macsec_skb_cb(skb)->assoc_num = hdr->tci_an & MACSEC_AN_MASK;
1153 sci = macsec_frame_sci(hdr, macsec_skb_cb(skb)->has_sci);
1156 rxd = macsec_data_rcu(skb->dev);
1158 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1159 struct macsec_rx_sc *sc = find_rx_sc(&macsec->secy, sci);
1161 sc = sc ? macsec_rxsc_get(sc) : NULL;
1164 secy = &macsec->secy;
1174 macsec = macsec_priv(dev);
1175 secy_stats = this_cpu_ptr(macsec->stats);
1176 rxsc_stats = this_cpu_ptr(rx_sc->stats);
1178 if (!macsec_validate_skb(skb, secy->icv_len, secy->xpn)) {
1179 u64_stats_update_begin(&secy_stats->syncp);
1180 secy_stats->stats.InPktsBadTag++;
1181 u64_stats_update_end(&secy_stats->syncp);
1182 DEV_STATS_INC(secy->netdev, rx_errors);
1186 rx_sa = macsec_rxsa_get(rx_sc->sa[macsec_skb_cb(skb)->assoc_num]);
1188 /* 10.6.1 if the SA is not in use */
1190 /* If validateFrames is Strict or the C bit in the
1191 * SecTAG is set, discard
1193 struct macsec_rx_sa *active_rx_sa = macsec_active_rxsa_get(rx_sc);
1194 if (hdr->tci_an & MACSEC_TCI_C ||
1195 secy->validate_frames == MACSEC_VALIDATE_STRICT) {
1196 u64_stats_update_begin(&rxsc_stats->syncp);
1197 rxsc_stats->stats.InPktsNotUsingSA++;
1198 u64_stats_update_end(&rxsc_stats->syncp);
1199 DEV_STATS_INC(secy->netdev, rx_errors);
1201 this_cpu_inc(active_rx_sa->stats->InPktsNotUsingSA);
1205 /* not Strict, the frame (with the SecTAG and ICV
1206 * removed) is delivered to the Controlled Port.
1208 u64_stats_update_begin(&rxsc_stats->syncp);
1209 rxsc_stats->stats.InPktsUnusedSA++;
1210 u64_stats_update_end(&rxsc_stats->syncp);
1212 this_cpu_inc(active_rx_sa->stats->InPktsUnusedSA);
1216 /* First, PN check to avoid decrypting obviously wrong packets */
1217 hdr_pn = ntohl(hdr->packet_number);
1218 if (secy->replay_protect) {
1221 spin_lock(&rx_sa->lock);
1222 late = rx_sa->next_pn_halves.lower >= secy->replay_window &&
1223 hdr_pn < (rx_sa->next_pn_halves.lower - secy->replay_window);
1226 late = late && pn_same_half(rx_sa->next_pn_halves.lower, hdr_pn);
1227 spin_unlock(&rx_sa->lock);
1230 u64_stats_update_begin(&rxsc_stats->syncp);
1231 rxsc_stats->stats.InPktsLate++;
1232 u64_stats_update_end(&rxsc_stats->syncp);
1233 DEV_STATS_INC(macsec->secy.netdev, rx_dropped);
1238 macsec_skb_cb(skb)->rx_sa = rx_sa;
1240 /* Disabled && !changed text => skip validation */
1241 if (hdr->tci_an & MACSEC_TCI_C ||
1242 secy->validate_frames != MACSEC_VALIDATE_DISABLED)
1243 skb = macsec_decrypt(skb, dev, rx_sa, sci, secy);
1246 /* the decrypt callback needs the reference */
1247 if (PTR_ERR(skb) != -EINPROGRESS) {
1248 macsec_rxsa_put(rx_sa);
1249 macsec_rxsc_put(rx_sc);
1253 return RX_HANDLER_CONSUMED;
1256 if (!macsec_post_decrypt(skb, secy, hdr_pn))
1260 macsec_finalize_skb(skb, secy->icv_len,
1261 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
1263 macsec_reset_skb(skb, secy->netdev);
1266 macsec_rxsa_put(rx_sa);
1267 macsec_rxsc_put(rx_sc);
1270 ret = gro_cells_receive(&macsec->gro_cells, skb);
1271 if (ret == NET_RX_SUCCESS)
1274 DEV_STATS_INC(macsec->secy.netdev, rx_dropped);
1279 return RX_HANDLER_CONSUMED;
1282 macsec_rxsa_put(rx_sa);
1284 macsec_rxsc_put(rx_sc);
1289 return RX_HANDLER_CONSUMED;
1292 /* 10.6.1 if the SC is not found */
1293 cbit = !!(hdr->tci_an & MACSEC_TCI_C);
1295 macsec_finalize_skb(skb, MACSEC_DEFAULT_ICV_LEN,
1296 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
1298 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1299 struct sk_buff *nskb;
1301 secy_stats = this_cpu_ptr(macsec->stats);
1303 /* If validateFrames is Strict or the C bit in the
1304 * SecTAG is set, discard
1307 macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) {
1308 u64_stats_update_begin(&secy_stats->syncp);
1309 secy_stats->stats.InPktsNoSCI++;
1310 u64_stats_update_end(&secy_stats->syncp);
1311 DEV_STATS_INC(macsec->secy.netdev, rx_errors);
1315 /* not strict, the frame (with the SecTAG and ICV
1316 * removed) is delivered to the Controlled Port.
1318 nskb = skb_clone(skb, GFP_ATOMIC);
1322 macsec_reset_skb(nskb, macsec->secy.netdev);
1324 ret = __netif_rx(nskb);
1325 if (ret == NET_RX_SUCCESS) {
1326 u64_stats_update_begin(&secy_stats->syncp);
1327 secy_stats->stats.InPktsUnknownSCI++;
1328 u64_stats_update_end(&secy_stats->syncp);
1330 DEV_STATS_INC(macsec->secy.netdev, rx_dropped);
1336 return RX_HANDLER_PASS;
1339 static struct crypto_aead *macsec_alloc_tfm(char *key, int key_len, int icv_len)
1341 struct crypto_aead *tfm;
1344 /* Pick a sync gcm(aes) cipher to ensure order is preserved. */
1345 tfm = crypto_alloc_aead("gcm(aes)", 0, CRYPTO_ALG_ASYNC);
1350 ret = crypto_aead_setkey(tfm, key, key_len);
1354 ret = crypto_aead_setauthsize(tfm, icv_len);
1360 crypto_free_aead(tfm);
1361 return ERR_PTR(ret);
1364 static int init_rx_sa(struct macsec_rx_sa *rx_sa, char *sak, int key_len,
1367 rx_sa->stats = alloc_percpu(struct macsec_rx_sa_stats);
1371 rx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len);
1372 if (IS_ERR(rx_sa->key.tfm)) {
1373 free_percpu(rx_sa->stats);
1374 return PTR_ERR(rx_sa->key.tfm);
1377 rx_sa->ssci = MACSEC_UNDEF_SSCI;
1378 rx_sa->active = false;
1380 refcount_set(&rx_sa->refcnt, 1);
1381 spin_lock_init(&rx_sa->lock);
1386 static void clear_rx_sa(struct macsec_rx_sa *rx_sa)
1388 rx_sa->active = false;
1390 macsec_rxsa_put(rx_sa);
1393 static void free_rx_sc(struct macsec_rx_sc *rx_sc)
1397 for (i = 0; i < MACSEC_NUM_AN; i++) {
1398 struct macsec_rx_sa *sa = rtnl_dereference(rx_sc->sa[i]);
1400 RCU_INIT_POINTER(rx_sc->sa[i], NULL);
1405 macsec_rxsc_put(rx_sc);
1408 static struct macsec_rx_sc *del_rx_sc(struct macsec_secy *secy, sci_t sci)
1410 struct macsec_rx_sc *rx_sc, __rcu **rx_scp;
1412 for (rx_scp = &secy->rx_sc, rx_sc = rtnl_dereference(*rx_scp);
1414 rx_scp = &rx_sc->next, rx_sc = rtnl_dereference(*rx_scp)) {
1415 if (rx_sc->sci == sci) {
1418 rcu_assign_pointer(*rx_scp, rx_sc->next);
1426 static struct macsec_rx_sc *create_rx_sc(struct net_device *dev, sci_t sci,
1429 struct macsec_rx_sc *rx_sc;
1430 struct macsec_dev *macsec;
1431 struct net_device *real_dev = macsec_priv(dev)->real_dev;
1432 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
1433 struct macsec_secy *secy;
1435 list_for_each_entry(macsec, &rxd->secys, secys) {
1436 if (find_rx_sc_rtnl(&macsec->secy, sci))
1437 return ERR_PTR(-EEXIST);
1440 rx_sc = kzalloc(sizeof(*rx_sc), GFP_KERNEL);
1442 return ERR_PTR(-ENOMEM);
1444 rx_sc->stats = netdev_alloc_pcpu_stats(struct pcpu_rx_sc_stats);
1445 if (!rx_sc->stats) {
1447 return ERR_PTR(-ENOMEM);
1451 rx_sc->active = active;
1452 refcount_set(&rx_sc->refcnt, 1);
1454 secy = &macsec_priv(dev)->secy;
1455 rcu_assign_pointer(rx_sc->next, secy->rx_sc);
1456 rcu_assign_pointer(secy->rx_sc, rx_sc);
1464 static int init_tx_sa(struct macsec_tx_sa *tx_sa, char *sak, int key_len,
1467 tx_sa->stats = alloc_percpu(struct macsec_tx_sa_stats);
1471 tx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len);
1472 if (IS_ERR(tx_sa->key.tfm)) {
1473 free_percpu(tx_sa->stats);
1474 return PTR_ERR(tx_sa->key.tfm);
1477 tx_sa->ssci = MACSEC_UNDEF_SSCI;
1478 tx_sa->active = false;
1479 refcount_set(&tx_sa->refcnt, 1);
1480 spin_lock_init(&tx_sa->lock);
1485 static void clear_tx_sa(struct macsec_tx_sa *tx_sa)
1487 tx_sa->active = false;
1489 macsec_txsa_put(tx_sa);
1492 static struct genl_family macsec_fam;
1494 static struct net_device *get_dev_from_nl(struct net *net,
1495 struct nlattr **attrs)
1497 int ifindex = nla_get_u32(attrs[MACSEC_ATTR_IFINDEX]);
1498 struct net_device *dev;
1500 dev = __dev_get_by_index(net, ifindex);
1502 return ERR_PTR(-ENODEV);
1504 if (!netif_is_macsec(dev))
1505 return ERR_PTR(-ENODEV);
1510 static enum macsec_offload nla_get_offload(const struct nlattr *nla)
1512 return (__force enum macsec_offload)nla_get_u8(nla);
1515 static sci_t nla_get_sci(const struct nlattr *nla)
1517 return (__force sci_t)nla_get_u64(nla);
1520 static int nla_put_sci(struct sk_buff *skb, int attrtype, sci_t value,
1523 return nla_put_u64_64bit(skb, attrtype, (__force u64)value, padattr);
1526 static ssci_t nla_get_ssci(const struct nlattr *nla)
1528 return (__force ssci_t)nla_get_u32(nla);
1531 static int nla_put_ssci(struct sk_buff *skb, int attrtype, ssci_t value)
1533 return nla_put_u32(skb, attrtype, (__force u64)value);
1536 static struct macsec_tx_sa *get_txsa_from_nl(struct net *net,
1537 struct nlattr **attrs,
1538 struct nlattr **tb_sa,
1539 struct net_device **devp,
1540 struct macsec_secy **secyp,
1541 struct macsec_tx_sc **scp,
1544 struct net_device *dev;
1545 struct macsec_secy *secy;
1546 struct macsec_tx_sc *tx_sc;
1547 struct macsec_tx_sa *tx_sa;
1549 if (!tb_sa[MACSEC_SA_ATTR_AN])
1550 return ERR_PTR(-EINVAL);
1552 *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1554 dev = get_dev_from_nl(net, attrs);
1556 return ERR_CAST(dev);
1558 if (*assoc_num >= MACSEC_NUM_AN)
1559 return ERR_PTR(-EINVAL);
1561 secy = &macsec_priv(dev)->secy;
1562 tx_sc = &secy->tx_sc;
1564 tx_sa = rtnl_dereference(tx_sc->sa[*assoc_num]);
1566 return ERR_PTR(-ENODEV);
1574 static struct macsec_rx_sc *get_rxsc_from_nl(struct net *net,
1575 struct nlattr **attrs,
1576 struct nlattr **tb_rxsc,
1577 struct net_device **devp,
1578 struct macsec_secy **secyp)
1580 struct net_device *dev;
1581 struct macsec_secy *secy;
1582 struct macsec_rx_sc *rx_sc;
1585 dev = get_dev_from_nl(net, attrs);
1587 return ERR_CAST(dev);
1589 secy = &macsec_priv(dev)->secy;
1591 if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI])
1592 return ERR_PTR(-EINVAL);
1594 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1595 rx_sc = find_rx_sc_rtnl(secy, sci);
1597 return ERR_PTR(-ENODEV);
1605 static struct macsec_rx_sa *get_rxsa_from_nl(struct net *net,
1606 struct nlattr **attrs,
1607 struct nlattr **tb_rxsc,
1608 struct nlattr **tb_sa,
1609 struct net_device **devp,
1610 struct macsec_secy **secyp,
1611 struct macsec_rx_sc **scp,
1614 struct macsec_rx_sc *rx_sc;
1615 struct macsec_rx_sa *rx_sa;
1617 if (!tb_sa[MACSEC_SA_ATTR_AN])
1618 return ERR_PTR(-EINVAL);
1620 *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1621 if (*assoc_num >= MACSEC_NUM_AN)
1622 return ERR_PTR(-EINVAL);
1624 rx_sc = get_rxsc_from_nl(net, attrs, tb_rxsc, devp, secyp);
1626 return ERR_CAST(rx_sc);
1628 rx_sa = rtnl_dereference(rx_sc->sa[*assoc_num]);
1630 return ERR_PTR(-ENODEV);
1636 static const struct nla_policy macsec_genl_policy[NUM_MACSEC_ATTR] = {
1637 [MACSEC_ATTR_IFINDEX] = { .type = NLA_U32 },
1638 [MACSEC_ATTR_RXSC_CONFIG] = { .type = NLA_NESTED },
1639 [MACSEC_ATTR_SA_CONFIG] = { .type = NLA_NESTED },
1640 [MACSEC_ATTR_OFFLOAD] = { .type = NLA_NESTED },
1643 static const struct nla_policy macsec_genl_rxsc_policy[NUM_MACSEC_RXSC_ATTR] = {
1644 [MACSEC_RXSC_ATTR_SCI] = { .type = NLA_U64 },
1645 [MACSEC_RXSC_ATTR_ACTIVE] = { .type = NLA_U8 },
1648 static const struct nla_policy macsec_genl_sa_policy[NUM_MACSEC_SA_ATTR] = {
1649 [MACSEC_SA_ATTR_AN] = { .type = NLA_U8 },
1650 [MACSEC_SA_ATTR_ACTIVE] = { .type = NLA_U8 },
1651 [MACSEC_SA_ATTR_PN] = NLA_POLICY_MIN_LEN(4),
1652 [MACSEC_SA_ATTR_KEYID] = { .type = NLA_BINARY,
1653 .len = MACSEC_KEYID_LEN, },
1654 [MACSEC_SA_ATTR_KEY] = { .type = NLA_BINARY,
1655 .len = MACSEC_MAX_KEY_LEN, },
1656 [MACSEC_SA_ATTR_SSCI] = { .type = NLA_U32 },
1657 [MACSEC_SA_ATTR_SALT] = { .type = NLA_BINARY,
1658 .len = MACSEC_SALT_LEN, },
1661 static const struct nla_policy macsec_genl_offload_policy[NUM_MACSEC_OFFLOAD_ATTR] = {
1662 [MACSEC_OFFLOAD_ATTR_TYPE] = { .type = NLA_U8 },
1665 /* Offloads an operation to a device driver */
1666 static int macsec_offload(int (* const func)(struct macsec_context *),
1667 struct macsec_context *ctx)
1671 if (unlikely(!func))
1674 if (ctx->offload == MACSEC_OFFLOAD_PHY)
1675 mutex_lock(&ctx->phydev->lock);
1679 if (ctx->offload == MACSEC_OFFLOAD_PHY)
1680 mutex_unlock(&ctx->phydev->lock);
1685 static int parse_sa_config(struct nlattr **attrs, struct nlattr **tb_sa)
1687 if (!attrs[MACSEC_ATTR_SA_CONFIG])
1690 if (nla_parse_nested_deprecated(tb_sa, MACSEC_SA_ATTR_MAX, attrs[MACSEC_ATTR_SA_CONFIG], macsec_genl_sa_policy, NULL))
1696 static int parse_rxsc_config(struct nlattr **attrs, struct nlattr **tb_rxsc)
1698 if (!attrs[MACSEC_ATTR_RXSC_CONFIG])
1701 if (nla_parse_nested_deprecated(tb_rxsc, MACSEC_RXSC_ATTR_MAX, attrs[MACSEC_ATTR_RXSC_CONFIG], macsec_genl_rxsc_policy, NULL))
1707 static bool validate_add_rxsa(struct nlattr **attrs)
1709 if (!attrs[MACSEC_SA_ATTR_AN] ||
1710 !attrs[MACSEC_SA_ATTR_KEY] ||
1711 !attrs[MACSEC_SA_ATTR_KEYID])
1714 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
1717 if (attrs[MACSEC_SA_ATTR_PN] &&
1718 nla_get_u64(attrs[MACSEC_SA_ATTR_PN]) == 0)
1721 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
1722 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
1726 if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN)
1732 static int macsec_add_rxsa(struct sk_buff *skb, struct genl_info *info)
1734 struct net_device *dev;
1735 struct nlattr **attrs = info->attrs;
1736 struct macsec_secy *secy;
1737 struct macsec_rx_sc *rx_sc;
1738 struct macsec_rx_sa *rx_sa;
1739 unsigned char assoc_num;
1741 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1742 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1745 if (!attrs[MACSEC_ATTR_IFINDEX])
1748 if (parse_sa_config(attrs, tb_sa))
1751 if (parse_rxsc_config(attrs, tb_rxsc))
1754 if (!validate_add_rxsa(tb_sa))
1758 rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy);
1759 if (IS_ERR(rx_sc)) {
1761 return PTR_ERR(rx_sc);
1764 assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1766 if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) {
1767 pr_notice("macsec: nl: add_rxsa: bad key length: %d != %d\n",
1768 nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len);
1773 pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
1774 if (tb_sa[MACSEC_SA_ATTR_PN] &&
1775 nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
1776 pr_notice("macsec: nl: add_rxsa: bad pn length: %d != %d\n",
1777 nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
1783 if (!tb_sa[MACSEC_SA_ATTR_SSCI] || !tb_sa[MACSEC_SA_ATTR_SALT]) {
1788 if (nla_len(tb_sa[MACSEC_SA_ATTR_SALT]) != MACSEC_SALT_LEN) {
1789 pr_notice("macsec: nl: add_rxsa: bad salt length: %d != %d\n",
1790 nla_len(tb_sa[MACSEC_SA_ATTR_SALT]),
1797 rx_sa = rtnl_dereference(rx_sc->sa[assoc_num]);
1803 rx_sa = kmalloc(sizeof(*rx_sa), GFP_KERNEL);
1809 err = init_rx_sa(rx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
1810 secy->key_len, secy->icv_len);
1817 if (tb_sa[MACSEC_SA_ATTR_PN]) {
1818 spin_lock_bh(&rx_sa->lock);
1819 rx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
1820 spin_unlock_bh(&rx_sa->lock);
1823 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
1824 rx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
1829 rx_sa->ssci = nla_get_ssci(tb_sa[MACSEC_SA_ATTR_SSCI]);
1830 nla_memcpy(rx_sa->key.salt.bytes, tb_sa[MACSEC_SA_ATTR_SALT],
1834 /* If h/w offloading is available, propagate to the device */
1835 if (macsec_is_offloaded(netdev_priv(dev))) {
1836 const struct macsec_ops *ops;
1837 struct macsec_context ctx;
1839 ops = macsec_get_ops(netdev_priv(dev), &ctx);
1845 ctx.sa.assoc_num = assoc_num;
1846 ctx.sa.rx_sa = rx_sa;
1848 memcpy(ctx.sa.key, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
1851 err = macsec_offload(ops->mdo_add_rxsa, &ctx);
1852 memzero_explicit(ctx.sa.key, secy->key_len);
1857 nla_memcpy(rx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN);
1858 rcu_assign_pointer(rx_sc->sa[assoc_num], rx_sa);
1865 macsec_rxsa_put(rx_sa);
1870 static bool validate_add_rxsc(struct nlattr **attrs)
1872 if (!attrs[MACSEC_RXSC_ATTR_SCI])
1875 if (attrs[MACSEC_RXSC_ATTR_ACTIVE]) {
1876 if (nla_get_u8(attrs[MACSEC_RXSC_ATTR_ACTIVE]) > 1)
1883 static int macsec_add_rxsc(struct sk_buff *skb, struct genl_info *info)
1885 struct net_device *dev;
1886 sci_t sci = MACSEC_UNDEF_SCI;
1887 struct nlattr **attrs = info->attrs;
1888 struct macsec_rx_sc *rx_sc;
1889 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1890 struct macsec_secy *secy;
1894 if (!attrs[MACSEC_ATTR_IFINDEX])
1897 if (parse_rxsc_config(attrs, tb_rxsc))
1900 if (!validate_add_rxsc(tb_rxsc))
1904 dev = get_dev_from_nl(genl_info_net(info), attrs);
1907 return PTR_ERR(dev);
1910 secy = &macsec_priv(dev)->secy;
1911 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1913 if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE])
1914 active = nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]);
1916 rx_sc = create_rx_sc(dev, sci, active);
1917 if (IS_ERR(rx_sc)) {
1919 return PTR_ERR(rx_sc);
1922 if (macsec_is_offloaded(netdev_priv(dev))) {
1923 const struct macsec_ops *ops;
1924 struct macsec_context ctx;
1926 ops = macsec_get_ops(netdev_priv(dev), &ctx);
1935 ret = macsec_offload(ops->mdo_add_rxsc, &ctx);
1945 del_rx_sc(secy, sci);
1951 static bool validate_add_txsa(struct nlattr **attrs)
1953 if (!attrs[MACSEC_SA_ATTR_AN] ||
1954 !attrs[MACSEC_SA_ATTR_PN] ||
1955 !attrs[MACSEC_SA_ATTR_KEY] ||
1956 !attrs[MACSEC_SA_ATTR_KEYID])
1959 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
1962 if (nla_get_u64(attrs[MACSEC_SA_ATTR_PN]) == 0)
1965 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
1966 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
1970 if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN)
1976 static int macsec_add_txsa(struct sk_buff *skb, struct genl_info *info)
1978 struct net_device *dev;
1979 struct nlattr **attrs = info->attrs;
1980 struct macsec_secy *secy;
1981 struct macsec_tx_sc *tx_sc;
1982 struct macsec_tx_sa *tx_sa;
1983 unsigned char assoc_num;
1985 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1986 bool was_operational;
1989 if (!attrs[MACSEC_ATTR_IFINDEX])
1992 if (parse_sa_config(attrs, tb_sa))
1995 if (!validate_add_txsa(tb_sa))
1999 dev = get_dev_from_nl(genl_info_net(info), attrs);
2002 return PTR_ERR(dev);
2005 secy = &macsec_priv(dev)->secy;
2006 tx_sc = &secy->tx_sc;
2008 assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
2010 if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) {
2011 pr_notice("macsec: nl: add_txsa: bad key length: %d != %d\n",
2012 nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len);
2017 pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
2018 if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
2019 pr_notice("macsec: nl: add_txsa: bad pn length: %d != %d\n",
2020 nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
2026 if (!tb_sa[MACSEC_SA_ATTR_SSCI] || !tb_sa[MACSEC_SA_ATTR_SALT]) {
2031 if (nla_len(tb_sa[MACSEC_SA_ATTR_SALT]) != MACSEC_SALT_LEN) {
2032 pr_notice("macsec: nl: add_txsa: bad salt length: %d != %d\n",
2033 nla_len(tb_sa[MACSEC_SA_ATTR_SALT]),
2040 tx_sa = rtnl_dereference(tx_sc->sa[assoc_num]);
2046 tx_sa = kmalloc(sizeof(*tx_sa), GFP_KERNEL);
2052 err = init_tx_sa(tx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
2053 secy->key_len, secy->icv_len);
2060 spin_lock_bh(&tx_sa->lock);
2061 tx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
2062 spin_unlock_bh(&tx_sa->lock);
2064 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2065 tx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2067 was_operational = secy->operational;
2068 if (assoc_num == tx_sc->encoding_sa && tx_sa->active)
2069 secy->operational = true;
2072 tx_sa->ssci = nla_get_ssci(tb_sa[MACSEC_SA_ATTR_SSCI]);
2073 nla_memcpy(tx_sa->key.salt.bytes, tb_sa[MACSEC_SA_ATTR_SALT],
2077 /* If h/w offloading is available, propagate to the device */
2078 if (macsec_is_offloaded(netdev_priv(dev))) {
2079 const struct macsec_ops *ops;
2080 struct macsec_context ctx;
2082 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2088 ctx.sa.assoc_num = assoc_num;
2089 ctx.sa.tx_sa = tx_sa;
2091 memcpy(ctx.sa.key, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
2094 err = macsec_offload(ops->mdo_add_txsa, &ctx);
2095 memzero_explicit(ctx.sa.key, secy->key_len);
2100 nla_memcpy(tx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN);
2101 rcu_assign_pointer(tx_sc->sa[assoc_num], tx_sa);
2108 secy->operational = was_operational;
2109 macsec_txsa_put(tx_sa);
2114 static int macsec_del_rxsa(struct sk_buff *skb, struct genl_info *info)
2116 struct nlattr **attrs = info->attrs;
2117 struct net_device *dev;
2118 struct macsec_secy *secy;
2119 struct macsec_rx_sc *rx_sc;
2120 struct macsec_rx_sa *rx_sa;
2122 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2123 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2126 if (!attrs[MACSEC_ATTR_IFINDEX])
2129 if (parse_sa_config(attrs, tb_sa))
2132 if (parse_rxsc_config(attrs, tb_rxsc))
2136 rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa,
2137 &dev, &secy, &rx_sc, &assoc_num);
2138 if (IS_ERR(rx_sa)) {
2140 return PTR_ERR(rx_sa);
2143 if (rx_sa->active) {
2148 /* If h/w offloading is available, propagate to the device */
2149 if (macsec_is_offloaded(netdev_priv(dev))) {
2150 const struct macsec_ops *ops;
2151 struct macsec_context ctx;
2153 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2159 ctx.sa.assoc_num = assoc_num;
2160 ctx.sa.rx_sa = rx_sa;
2163 ret = macsec_offload(ops->mdo_del_rxsa, &ctx);
2168 RCU_INIT_POINTER(rx_sc->sa[assoc_num], NULL);
2180 static int macsec_del_rxsc(struct sk_buff *skb, struct genl_info *info)
2182 struct nlattr **attrs = info->attrs;
2183 struct net_device *dev;
2184 struct macsec_secy *secy;
2185 struct macsec_rx_sc *rx_sc;
2187 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2190 if (!attrs[MACSEC_ATTR_IFINDEX])
2193 if (parse_rxsc_config(attrs, tb_rxsc))
2196 if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI])
2200 dev = get_dev_from_nl(genl_info_net(info), info->attrs);
2203 return PTR_ERR(dev);
2206 secy = &macsec_priv(dev)->secy;
2207 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
2209 rx_sc = del_rx_sc(secy, sci);
2215 /* If h/w offloading is available, propagate to the device */
2216 if (macsec_is_offloaded(netdev_priv(dev))) {
2217 const struct macsec_ops *ops;
2218 struct macsec_context ctx;
2220 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2228 ret = macsec_offload(ops->mdo_del_rxsc, &ctx);
2243 static int macsec_del_txsa(struct sk_buff *skb, struct genl_info *info)
2245 struct nlattr **attrs = info->attrs;
2246 struct net_device *dev;
2247 struct macsec_secy *secy;
2248 struct macsec_tx_sc *tx_sc;
2249 struct macsec_tx_sa *tx_sa;
2251 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2254 if (!attrs[MACSEC_ATTR_IFINDEX])
2257 if (parse_sa_config(attrs, tb_sa))
2261 tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa,
2262 &dev, &secy, &tx_sc, &assoc_num);
2263 if (IS_ERR(tx_sa)) {
2265 return PTR_ERR(tx_sa);
2268 if (tx_sa->active) {
2273 /* If h/w offloading is available, propagate to the device */
2274 if (macsec_is_offloaded(netdev_priv(dev))) {
2275 const struct macsec_ops *ops;
2276 struct macsec_context ctx;
2278 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2284 ctx.sa.assoc_num = assoc_num;
2285 ctx.sa.tx_sa = tx_sa;
2288 ret = macsec_offload(ops->mdo_del_txsa, &ctx);
2293 RCU_INIT_POINTER(tx_sc->sa[assoc_num], NULL);
2305 static bool validate_upd_sa(struct nlattr **attrs)
2307 if (!attrs[MACSEC_SA_ATTR_AN] ||
2308 attrs[MACSEC_SA_ATTR_KEY] ||
2309 attrs[MACSEC_SA_ATTR_KEYID] ||
2310 attrs[MACSEC_SA_ATTR_SSCI] ||
2311 attrs[MACSEC_SA_ATTR_SALT])
2314 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
2317 if (attrs[MACSEC_SA_ATTR_PN] && nla_get_u64(attrs[MACSEC_SA_ATTR_PN]) == 0)
2320 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
2321 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
2328 static int macsec_upd_txsa(struct sk_buff *skb, struct genl_info *info)
2330 struct nlattr **attrs = info->attrs;
2331 struct net_device *dev;
2332 struct macsec_secy *secy;
2333 struct macsec_tx_sc *tx_sc;
2334 struct macsec_tx_sa *tx_sa;
2336 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2337 bool was_operational, was_active;
2343 if (!attrs[MACSEC_ATTR_IFINDEX])
2346 if (parse_sa_config(attrs, tb_sa))
2349 if (!validate_upd_sa(tb_sa))
2353 tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa,
2354 &dev, &secy, &tx_sc, &assoc_num);
2355 if (IS_ERR(tx_sa)) {
2357 return PTR_ERR(tx_sa);
2360 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2363 pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
2364 if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
2365 pr_notice("macsec: nl: upd_txsa: bad pn length: %d != %d\n",
2366 nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
2371 spin_lock_bh(&tx_sa->lock);
2372 prev_pn = tx_sa->next_pn_halves;
2373 tx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
2374 spin_unlock_bh(&tx_sa->lock);
2377 was_active = tx_sa->active;
2378 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2379 tx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2381 was_operational = secy->operational;
2382 if (assoc_num == tx_sc->encoding_sa)
2383 secy->operational = tx_sa->active;
2385 /* If h/w offloading is available, propagate to the device */
2386 if (macsec_is_offloaded(netdev_priv(dev))) {
2387 const struct macsec_ops *ops;
2388 struct macsec_context ctx;
2390 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2396 ctx.sa.assoc_num = assoc_num;
2397 ctx.sa.tx_sa = tx_sa;
2400 ret = macsec_offload(ops->mdo_upd_txsa, &ctx);
2410 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2411 spin_lock_bh(&tx_sa->lock);
2412 tx_sa->next_pn_halves = prev_pn;
2413 spin_unlock_bh(&tx_sa->lock);
2415 tx_sa->active = was_active;
2416 secy->operational = was_operational;
2421 static int macsec_upd_rxsa(struct sk_buff *skb, struct genl_info *info)
2423 struct nlattr **attrs = info->attrs;
2424 struct net_device *dev;
2425 struct macsec_secy *secy;
2426 struct macsec_rx_sc *rx_sc;
2427 struct macsec_rx_sa *rx_sa;
2429 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2430 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2437 if (!attrs[MACSEC_ATTR_IFINDEX])
2440 if (parse_rxsc_config(attrs, tb_rxsc))
2443 if (parse_sa_config(attrs, tb_sa))
2446 if (!validate_upd_sa(tb_sa))
2450 rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa,
2451 &dev, &secy, &rx_sc, &assoc_num);
2452 if (IS_ERR(rx_sa)) {
2454 return PTR_ERR(rx_sa);
2457 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2460 pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
2461 if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
2462 pr_notice("macsec: nl: upd_rxsa: bad pn length: %d != %d\n",
2463 nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
2468 spin_lock_bh(&rx_sa->lock);
2469 prev_pn = rx_sa->next_pn_halves;
2470 rx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
2471 spin_unlock_bh(&rx_sa->lock);
2474 was_active = rx_sa->active;
2475 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2476 rx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2478 /* If h/w offloading is available, propagate to the device */
2479 if (macsec_is_offloaded(netdev_priv(dev))) {
2480 const struct macsec_ops *ops;
2481 struct macsec_context ctx;
2483 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2489 ctx.sa.assoc_num = assoc_num;
2490 ctx.sa.rx_sa = rx_sa;
2493 ret = macsec_offload(ops->mdo_upd_rxsa, &ctx);
2502 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2503 spin_lock_bh(&rx_sa->lock);
2504 rx_sa->next_pn_halves = prev_pn;
2505 spin_unlock_bh(&rx_sa->lock);
2507 rx_sa->active = was_active;
2512 static int macsec_upd_rxsc(struct sk_buff *skb, struct genl_info *info)
2514 struct nlattr **attrs = info->attrs;
2515 struct net_device *dev;
2516 struct macsec_secy *secy;
2517 struct macsec_rx_sc *rx_sc;
2518 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2519 unsigned int prev_n_rx_sc;
2523 if (!attrs[MACSEC_ATTR_IFINDEX])
2526 if (parse_rxsc_config(attrs, tb_rxsc))
2529 if (!validate_add_rxsc(tb_rxsc))
2533 rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy);
2534 if (IS_ERR(rx_sc)) {
2536 return PTR_ERR(rx_sc);
2539 was_active = rx_sc->active;
2540 prev_n_rx_sc = secy->n_rx_sc;
2541 if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]) {
2542 bool new = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]);
2544 if (rx_sc->active != new)
2545 secy->n_rx_sc += new ? 1 : -1;
2547 rx_sc->active = new;
2550 /* If h/w offloading is available, propagate to the device */
2551 if (macsec_is_offloaded(netdev_priv(dev))) {
2552 const struct macsec_ops *ops;
2553 struct macsec_context ctx;
2555 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2564 ret = macsec_offload(ops->mdo_upd_rxsc, &ctx);
2574 secy->n_rx_sc = prev_n_rx_sc;
2575 rx_sc->active = was_active;
2580 static bool macsec_is_configured(struct macsec_dev *macsec)
2582 struct macsec_secy *secy = &macsec->secy;
2583 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
2589 for (i = 0; i < MACSEC_NUM_AN; i++)
2596 static int macsec_update_offload(struct net_device *dev, enum macsec_offload offload)
2598 enum macsec_offload prev_offload;
2599 const struct macsec_ops *ops;
2600 struct macsec_context ctx;
2601 struct macsec_dev *macsec;
2604 macsec = macsec_priv(dev);
2606 /* Check if the offloading mode is supported by the underlying layers */
2607 if (offload != MACSEC_OFFLOAD_OFF &&
2608 !macsec_check_offload(offload, macsec))
2611 /* Check if the net device is busy. */
2612 if (netif_running(dev))
2615 /* Check if the device already has rules configured: we do not support
2618 if (macsec_is_configured(macsec))
2621 prev_offload = macsec->offload;
2623 ops = __macsec_get_ops(offload == MACSEC_OFFLOAD_OFF ? prev_offload : offload,
2628 macsec->offload = offload;
2630 ctx.secy = &macsec->secy;
2631 ret = offload == MACSEC_OFFLOAD_OFF ? macsec_offload(ops->mdo_del_secy, &ctx)
2632 : macsec_offload(ops->mdo_add_secy, &ctx);
2634 macsec->offload = prev_offload;
2639 static int macsec_upd_offload(struct sk_buff *skb, struct genl_info *info)
2641 struct nlattr *tb_offload[MACSEC_OFFLOAD_ATTR_MAX + 1];
2642 struct nlattr **attrs = info->attrs;
2643 enum macsec_offload offload;
2644 struct macsec_dev *macsec;
2645 struct net_device *dev;
2648 if (!attrs[MACSEC_ATTR_IFINDEX])
2651 if (!attrs[MACSEC_ATTR_OFFLOAD])
2654 if (nla_parse_nested_deprecated(tb_offload, MACSEC_OFFLOAD_ATTR_MAX,
2655 attrs[MACSEC_ATTR_OFFLOAD],
2656 macsec_genl_offload_policy, NULL))
2661 dev = get_dev_from_nl(genl_info_net(info), attrs);
2666 macsec = macsec_priv(dev);
2668 if (!tb_offload[MACSEC_OFFLOAD_ATTR_TYPE]) {
2673 offload = nla_get_u8(tb_offload[MACSEC_OFFLOAD_ATTR_TYPE]);
2675 if (macsec->offload != offload)
2676 ret = macsec_update_offload(dev, offload);
2682 static void get_tx_sa_stats(struct net_device *dev, int an,
2683 struct macsec_tx_sa *tx_sa,
2684 struct macsec_tx_sa_stats *sum)
2686 struct macsec_dev *macsec = macsec_priv(dev);
2689 /* If h/w offloading is available, propagate to the device */
2690 if (macsec_is_offloaded(macsec)) {
2691 const struct macsec_ops *ops;
2692 struct macsec_context ctx;
2694 ops = macsec_get_ops(macsec, &ctx);
2696 ctx.sa.assoc_num = an;
2697 ctx.sa.tx_sa = tx_sa;
2698 ctx.stats.tx_sa_stats = sum;
2699 ctx.secy = &macsec_priv(dev)->secy;
2700 macsec_offload(ops->mdo_get_tx_sa_stats, &ctx);
2705 for_each_possible_cpu(cpu) {
2706 const struct macsec_tx_sa_stats *stats =
2707 per_cpu_ptr(tx_sa->stats, cpu);
2709 sum->OutPktsProtected += stats->OutPktsProtected;
2710 sum->OutPktsEncrypted += stats->OutPktsEncrypted;
2714 static int copy_tx_sa_stats(struct sk_buff *skb, struct macsec_tx_sa_stats *sum)
2716 if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_PROTECTED,
2717 sum->OutPktsProtected) ||
2718 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_ENCRYPTED,
2719 sum->OutPktsEncrypted))
2725 static void get_rx_sa_stats(struct net_device *dev,
2726 struct macsec_rx_sc *rx_sc, int an,
2727 struct macsec_rx_sa *rx_sa,
2728 struct macsec_rx_sa_stats *sum)
2730 struct macsec_dev *macsec = macsec_priv(dev);
2733 /* If h/w offloading is available, propagate to the device */
2734 if (macsec_is_offloaded(macsec)) {
2735 const struct macsec_ops *ops;
2736 struct macsec_context ctx;
2738 ops = macsec_get_ops(macsec, &ctx);
2740 ctx.sa.assoc_num = an;
2741 ctx.sa.rx_sa = rx_sa;
2742 ctx.stats.rx_sa_stats = sum;
2743 ctx.secy = &macsec_priv(dev)->secy;
2745 macsec_offload(ops->mdo_get_rx_sa_stats, &ctx);
2750 for_each_possible_cpu(cpu) {
2751 const struct macsec_rx_sa_stats *stats =
2752 per_cpu_ptr(rx_sa->stats, cpu);
2754 sum->InPktsOK += stats->InPktsOK;
2755 sum->InPktsInvalid += stats->InPktsInvalid;
2756 sum->InPktsNotValid += stats->InPktsNotValid;
2757 sum->InPktsNotUsingSA += stats->InPktsNotUsingSA;
2758 sum->InPktsUnusedSA += stats->InPktsUnusedSA;
2762 static int copy_rx_sa_stats(struct sk_buff *skb,
2763 struct macsec_rx_sa_stats *sum)
2765 if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_OK, sum->InPktsOK) ||
2766 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_INVALID,
2767 sum->InPktsInvalid) ||
2768 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_VALID,
2769 sum->InPktsNotValid) ||
2770 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_USING_SA,
2771 sum->InPktsNotUsingSA) ||
2772 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_UNUSED_SA,
2773 sum->InPktsUnusedSA))
2779 static void get_rx_sc_stats(struct net_device *dev,
2780 struct macsec_rx_sc *rx_sc,
2781 struct macsec_rx_sc_stats *sum)
2783 struct macsec_dev *macsec = macsec_priv(dev);
2786 /* If h/w offloading is available, propagate to the device */
2787 if (macsec_is_offloaded(macsec)) {
2788 const struct macsec_ops *ops;
2789 struct macsec_context ctx;
2791 ops = macsec_get_ops(macsec, &ctx);
2793 ctx.stats.rx_sc_stats = sum;
2794 ctx.secy = &macsec_priv(dev)->secy;
2796 macsec_offload(ops->mdo_get_rx_sc_stats, &ctx);
2801 for_each_possible_cpu(cpu) {
2802 const struct pcpu_rx_sc_stats *stats;
2803 struct macsec_rx_sc_stats tmp;
2806 stats = per_cpu_ptr(rx_sc->stats, cpu);
2808 start = u64_stats_fetch_begin(&stats->syncp);
2809 memcpy(&tmp, &stats->stats, sizeof(tmp));
2810 } while (u64_stats_fetch_retry(&stats->syncp, start));
2812 sum->InOctetsValidated += tmp.InOctetsValidated;
2813 sum->InOctetsDecrypted += tmp.InOctetsDecrypted;
2814 sum->InPktsUnchecked += tmp.InPktsUnchecked;
2815 sum->InPktsDelayed += tmp.InPktsDelayed;
2816 sum->InPktsOK += tmp.InPktsOK;
2817 sum->InPktsInvalid += tmp.InPktsInvalid;
2818 sum->InPktsLate += tmp.InPktsLate;
2819 sum->InPktsNotValid += tmp.InPktsNotValid;
2820 sum->InPktsNotUsingSA += tmp.InPktsNotUsingSA;
2821 sum->InPktsUnusedSA += tmp.InPktsUnusedSA;
2825 static int copy_rx_sc_stats(struct sk_buff *skb, struct macsec_rx_sc_stats *sum)
2827 if (nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_VALIDATED,
2828 sum->InOctetsValidated,
2829 MACSEC_RXSC_STATS_ATTR_PAD) ||
2830 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_DECRYPTED,
2831 sum->InOctetsDecrypted,
2832 MACSEC_RXSC_STATS_ATTR_PAD) ||
2833 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNCHECKED,
2834 sum->InPktsUnchecked,
2835 MACSEC_RXSC_STATS_ATTR_PAD) ||
2836 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_DELAYED,
2838 MACSEC_RXSC_STATS_ATTR_PAD) ||
2839 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_OK,
2841 MACSEC_RXSC_STATS_ATTR_PAD) ||
2842 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_INVALID,
2844 MACSEC_RXSC_STATS_ATTR_PAD) ||
2845 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_LATE,
2847 MACSEC_RXSC_STATS_ATTR_PAD) ||
2848 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_VALID,
2849 sum->InPktsNotValid,
2850 MACSEC_RXSC_STATS_ATTR_PAD) ||
2851 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_USING_SA,
2852 sum->InPktsNotUsingSA,
2853 MACSEC_RXSC_STATS_ATTR_PAD) ||
2854 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNUSED_SA,
2855 sum->InPktsUnusedSA,
2856 MACSEC_RXSC_STATS_ATTR_PAD))
2862 static void get_tx_sc_stats(struct net_device *dev,
2863 struct macsec_tx_sc_stats *sum)
2865 struct macsec_dev *macsec = macsec_priv(dev);
2868 /* If h/w offloading is available, propagate to the device */
2869 if (macsec_is_offloaded(macsec)) {
2870 const struct macsec_ops *ops;
2871 struct macsec_context ctx;
2873 ops = macsec_get_ops(macsec, &ctx);
2875 ctx.stats.tx_sc_stats = sum;
2876 ctx.secy = &macsec_priv(dev)->secy;
2877 macsec_offload(ops->mdo_get_tx_sc_stats, &ctx);
2882 for_each_possible_cpu(cpu) {
2883 const struct pcpu_tx_sc_stats *stats;
2884 struct macsec_tx_sc_stats tmp;
2887 stats = per_cpu_ptr(macsec_priv(dev)->secy.tx_sc.stats, cpu);
2889 start = u64_stats_fetch_begin(&stats->syncp);
2890 memcpy(&tmp, &stats->stats, sizeof(tmp));
2891 } while (u64_stats_fetch_retry(&stats->syncp, start));
2893 sum->OutPktsProtected += tmp.OutPktsProtected;
2894 sum->OutPktsEncrypted += tmp.OutPktsEncrypted;
2895 sum->OutOctetsProtected += tmp.OutOctetsProtected;
2896 sum->OutOctetsEncrypted += tmp.OutOctetsEncrypted;
2900 static int copy_tx_sc_stats(struct sk_buff *skb, struct macsec_tx_sc_stats *sum)
2902 if (nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_PROTECTED,
2903 sum->OutPktsProtected,
2904 MACSEC_TXSC_STATS_ATTR_PAD) ||
2905 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_ENCRYPTED,
2906 sum->OutPktsEncrypted,
2907 MACSEC_TXSC_STATS_ATTR_PAD) ||
2908 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_PROTECTED,
2909 sum->OutOctetsProtected,
2910 MACSEC_TXSC_STATS_ATTR_PAD) ||
2911 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_ENCRYPTED,
2912 sum->OutOctetsEncrypted,
2913 MACSEC_TXSC_STATS_ATTR_PAD))
2919 static void get_secy_stats(struct net_device *dev, struct macsec_dev_stats *sum)
2921 struct macsec_dev *macsec = macsec_priv(dev);
2924 /* If h/w offloading is available, propagate to the device */
2925 if (macsec_is_offloaded(macsec)) {
2926 const struct macsec_ops *ops;
2927 struct macsec_context ctx;
2929 ops = macsec_get_ops(macsec, &ctx);
2931 ctx.stats.dev_stats = sum;
2932 ctx.secy = &macsec_priv(dev)->secy;
2933 macsec_offload(ops->mdo_get_dev_stats, &ctx);
2938 for_each_possible_cpu(cpu) {
2939 const struct pcpu_secy_stats *stats;
2940 struct macsec_dev_stats tmp;
2943 stats = per_cpu_ptr(macsec_priv(dev)->stats, cpu);
2945 start = u64_stats_fetch_begin(&stats->syncp);
2946 memcpy(&tmp, &stats->stats, sizeof(tmp));
2947 } while (u64_stats_fetch_retry(&stats->syncp, start));
2949 sum->OutPktsUntagged += tmp.OutPktsUntagged;
2950 sum->InPktsUntagged += tmp.InPktsUntagged;
2951 sum->OutPktsTooLong += tmp.OutPktsTooLong;
2952 sum->InPktsNoTag += tmp.InPktsNoTag;
2953 sum->InPktsBadTag += tmp.InPktsBadTag;
2954 sum->InPktsUnknownSCI += tmp.InPktsUnknownSCI;
2955 sum->InPktsNoSCI += tmp.InPktsNoSCI;
2956 sum->InPktsOverrun += tmp.InPktsOverrun;
2960 static int copy_secy_stats(struct sk_buff *skb, struct macsec_dev_stats *sum)
2962 if (nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_UNTAGGED,
2963 sum->OutPktsUntagged,
2964 MACSEC_SECY_STATS_ATTR_PAD) ||
2965 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNTAGGED,
2966 sum->InPktsUntagged,
2967 MACSEC_SECY_STATS_ATTR_PAD) ||
2968 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_TOO_LONG,
2969 sum->OutPktsTooLong,
2970 MACSEC_SECY_STATS_ATTR_PAD) ||
2971 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_TAG,
2973 MACSEC_SECY_STATS_ATTR_PAD) ||
2974 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_BAD_TAG,
2976 MACSEC_SECY_STATS_ATTR_PAD) ||
2977 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNKNOWN_SCI,
2978 sum->InPktsUnknownSCI,
2979 MACSEC_SECY_STATS_ATTR_PAD) ||
2980 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_SCI,
2982 MACSEC_SECY_STATS_ATTR_PAD) ||
2983 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_OVERRUN,
2985 MACSEC_SECY_STATS_ATTR_PAD))
2991 static int nla_put_secy(struct macsec_secy *secy, struct sk_buff *skb)
2993 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
2994 struct nlattr *secy_nest = nla_nest_start_noflag(skb,
3001 switch (secy->key_len) {
3002 case MACSEC_GCM_AES_128_SAK_LEN:
3003 csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_128 : MACSEC_DEFAULT_CIPHER_ID;
3005 case MACSEC_GCM_AES_256_SAK_LEN:
3006 csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_256 : MACSEC_CIPHER_ID_GCM_AES_256;
3012 if (nla_put_sci(skb, MACSEC_SECY_ATTR_SCI, secy->sci,
3013 MACSEC_SECY_ATTR_PAD) ||
3014 nla_put_u64_64bit(skb, MACSEC_SECY_ATTR_CIPHER_SUITE,
3015 csid, MACSEC_SECY_ATTR_PAD) ||
3016 nla_put_u8(skb, MACSEC_SECY_ATTR_ICV_LEN, secy->icv_len) ||
3017 nla_put_u8(skb, MACSEC_SECY_ATTR_OPER, secy->operational) ||
3018 nla_put_u8(skb, MACSEC_SECY_ATTR_PROTECT, secy->protect_frames) ||
3019 nla_put_u8(skb, MACSEC_SECY_ATTR_REPLAY, secy->replay_protect) ||
3020 nla_put_u8(skb, MACSEC_SECY_ATTR_VALIDATE, secy->validate_frames) ||
3021 nla_put_u8(skb, MACSEC_SECY_ATTR_ENCRYPT, tx_sc->encrypt) ||
3022 nla_put_u8(skb, MACSEC_SECY_ATTR_INC_SCI, tx_sc->send_sci) ||
3023 nla_put_u8(skb, MACSEC_SECY_ATTR_ES, tx_sc->end_station) ||
3024 nla_put_u8(skb, MACSEC_SECY_ATTR_SCB, tx_sc->scb) ||
3025 nla_put_u8(skb, MACSEC_SECY_ATTR_ENCODING_SA, tx_sc->encoding_sa))
3028 if (secy->replay_protect) {
3029 if (nla_put_u32(skb, MACSEC_SECY_ATTR_WINDOW, secy->replay_window))
3033 nla_nest_end(skb, secy_nest);
3037 nla_nest_cancel(skb, secy_nest);
3041 static noinline_for_stack int
3042 dump_secy(struct macsec_secy *secy, struct net_device *dev,
3043 struct sk_buff *skb, struct netlink_callback *cb)
3045 struct macsec_tx_sc_stats tx_sc_stats = {0, };
3046 struct macsec_tx_sa_stats tx_sa_stats = {0, };
3047 struct macsec_rx_sc_stats rx_sc_stats = {0, };
3048 struct macsec_rx_sa_stats rx_sa_stats = {0, };
3049 struct macsec_dev *macsec = netdev_priv(dev);
3050 struct macsec_dev_stats dev_stats = {0, };
3051 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
3052 struct nlattr *txsa_list, *rxsc_list;
3053 struct macsec_rx_sc *rx_sc;
3054 struct nlattr *attr;
3058 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
3059 &macsec_fam, NLM_F_MULTI, MACSEC_CMD_GET_TXSC);
3063 genl_dump_check_consistent(cb, hdr);
3065 if (nla_put_u32(skb, MACSEC_ATTR_IFINDEX, dev->ifindex))
3066 goto nla_put_failure;
3068 attr = nla_nest_start_noflag(skb, MACSEC_ATTR_OFFLOAD);
3070 goto nla_put_failure;
3071 if (nla_put_u8(skb, MACSEC_OFFLOAD_ATTR_TYPE, macsec->offload))
3072 goto nla_put_failure;
3073 nla_nest_end(skb, attr);
3075 if (nla_put_secy(secy, skb))
3076 goto nla_put_failure;
3078 attr = nla_nest_start_noflag(skb, MACSEC_ATTR_TXSC_STATS);
3080 goto nla_put_failure;
3082 get_tx_sc_stats(dev, &tx_sc_stats);
3083 if (copy_tx_sc_stats(skb, &tx_sc_stats)) {
3084 nla_nest_cancel(skb, attr);
3085 goto nla_put_failure;
3087 nla_nest_end(skb, attr);
3089 attr = nla_nest_start_noflag(skb, MACSEC_ATTR_SECY_STATS);
3091 goto nla_put_failure;
3092 get_secy_stats(dev, &dev_stats);
3093 if (copy_secy_stats(skb, &dev_stats)) {
3094 nla_nest_cancel(skb, attr);
3095 goto nla_put_failure;
3097 nla_nest_end(skb, attr);
3099 txsa_list = nla_nest_start_noflag(skb, MACSEC_ATTR_TXSA_LIST);
3101 goto nla_put_failure;
3102 for (i = 0, j = 1; i < MACSEC_NUM_AN; i++) {
3103 struct macsec_tx_sa *tx_sa = rtnl_dereference(tx_sc->sa[i]);
3104 struct nlattr *txsa_nest;
3111 txsa_nest = nla_nest_start_noflag(skb, j++);
3113 nla_nest_cancel(skb, txsa_list);
3114 goto nla_put_failure;
3117 attr = nla_nest_start_noflag(skb, MACSEC_SA_ATTR_STATS);
3119 nla_nest_cancel(skb, txsa_nest);
3120 nla_nest_cancel(skb, txsa_list);
3121 goto nla_put_failure;
3123 memset(&tx_sa_stats, 0, sizeof(tx_sa_stats));
3124 get_tx_sa_stats(dev, i, tx_sa, &tx_sa_stats);
3125 if (copy_tx_sa_stats(skb, &tx_sa_stats)) {
3126 nla_nest_cancel(skb, attr);
3127 nla_nest_cancel(skb, txsa_nest);
3128 nla_nest_cancel(skb, txsa_list);
3129 goto nla_put_failure;
3131 nla_nest_end(skb, attr);
3134 pn = tx_sa->next_pn;
3135 pn_len = MACSEC_XPN_PN_LEN;
3137 pn = tx_sa->next_pn_halves.lower;
3138 pn_len = MACSEC_DEFAULT_PN_LEN;
3141 if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) ||
3142 nla_put(skb, MACSEC_SA_ATTR_PN, pn_len, &pn) ||
3143 nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, tx_sa->key.id) ||
3144 (secy->xpn && nla_put_ssci(skb, MACSEC_SA_ATTR_SSCI, tx_sa->ssci)) ||
3145 nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, tx_sa->active)) {
3146 nla_nest_cancel(skb, txsa_nest);
3147 nla_nest_cancel(skb, txsa_list);
3148 goto nla_put_failure;
3151 nla_nest_end(skb, txsa_nest);
3153 nla_nest_end(skb, txsa_list);
3155 rxsc_list = nla_nest_start_noflag(skb, MACSEC_ATTR_RXSC_LIST);
3157 goto nla_put_failure;
3160 for_each_rxsc_rtnl(secy, rx_sc) {
3162 struct nlattr *rxsa_list;
3163 struct nlattr *rxsc_nest = nla_nest_start_noflag(skb, j++);
3166 nla_nest_cancel(skb, rxsc_list);
3167 goto nla_put_failure;
3170 if (nla_put_u8(skb, MACSEC_RXSC_ATTR_ACTIVE, rx_sc->active) ||
3171 nla_put_sci(skb, MACSEC_RXSC_ATTR_SCI, rx_sc->sci,
3172 MACSEC_RXSC_ATTR_PAD)) {
3173 nla_nest_cancel(skb, rxsc_nest);
3174 nla_nest_cancel(skb, rxsc_list);
3175 goto nla_put_failure;
3178 attr = nla_nest_start_noflag(skb, MACSEC_RXSC_ATTR_STATS);
3180 nla_nest_cancel(skb, rxsc_nest);
3181 nla_nest_cancel(skb, rxsc_list);
3182 goto nla_put_failure;
3184 memset(&rx_sc_stats, 0, sizeof(rx_sc_stats));
3185 get_rx_sc_stats(dev, rx_sc, &rx_sc_stats);
3186 if (copy_rx_sc_stats(skb, &rx_sc_stats)) {
3187 nla_nest_cancel(skb, attr);
3188 nla_nest_cancel(skb, rxsc_nest);
3189 nla_nest_cancel(skb, rxsc_list);
3190 goto nla_put_failure;
3192 nla_nest_end(skb, attr);
3194 rxsa_list = nla_nest_start_noflag(skb,
3195 MACSEC_RXSC_ATTR_SA_LIST);
3197 nla_nest_cancel(skb, rxsc_nest);
3198 nla_nest_cancel(skb, rxsc_list);
3199 goto nla_put_failure;
3202 for (i = 0, k = 1; i < MACSEC_NUM_AN; i++) {
3203 struct macsec_rx_sa *rx_sa = rtnl_dereference(rx_sc->sa[i]);
3204 struct nlattr *rxsa_nest;
3211 rxsa_nest = nla_nest_start_noflag(skb, k++);
3213 nla_nest_cancel(skb, rxsa_list);
3214 nla_nest_cancel(skb, rxsc_nest);
3215 nla_nest_cancel(skb, rxsc_list);
3216 goto nla_put_failure;
3219 attr = nla_nest_start_noflag(skb,
3220 MACSEC_SA_ATTR_STATS);
3222 nla_nest_cancel(skb, rxsa_list);
3223 nla_nest_cancel(skb, rxsc_nest);
3224 nla_nest_cancel(skb, rxsc_list);
3225 goto nla_put_failure;
3227 memset(&rx_sa_stats, 0, sizeof(rx_sa_stats));
3228 get_rx_sa_stats(dev, rx_sc, i, rx_sa, &rx_sa_stats);
3229 if (copy_rx_sa_stats(skb, &rx_sa_stats)) {
3230 nla_nest_cancel(skb, attr);
3231 nla_nest_cancel(skb, rxsa_list);
3232 nla_nest_cancel(skb, rxsc_nest);
3233 nla_nest_cancel(skb, rxsc_list);
3234 goto nla_put_failure;
3236 nla_nest_end(skb, attr);
3239 pn = rx_sa->next_pn;
3240 pn_len = MACSEC_XPN_PN_LEN;
3242 pn = rx_sa->next_pn_halves.lower;
3243 pn_len = MACSEC_DEFAULT_PN_LEN;
3246 if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) ||
3247 nla_put(skb, MACSEC_SA_ATTR_PN, pn_len, &pn) ||
3248 nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, rx_sa->key.id) ||
3249 (secy->xpn && nla_put_ssci(skb, MACSEC_SA_ATTR_SSCI, rx_sa->ssci)) ||
3250 nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, rx_sa->active)) {
3251 nla_nest_cancel(skb, rxsa_nest);
3252 nla_nest_cancel(skb, rxsc_nest);
3253 nla_nest_cancel(skb, rxsc_list);
3254 goto nla_put_failure;
3256 nla_nest_end(skb, rxsa_nest);
3259 nla_nest_end(skb, rxsa_list);
3260 nla_nest_end(skb, rxsc_nest);
3263 nla_nest_end(skb, rxsc_list);
3265 genlmsg_end(skb, hdr);
3270 genlmsg_cancel(skb, hdr);
3274 static int macsec_generation = 1; /* protected by RTNL */
3276 static int macsec_dump_txsc(struct sk_buff *skb, struct netlink_callback *cb)
3278 struct net *net = sock_net(skb->sk);
3279 struct net_device *dev;
3282 dev_idx = cb->args[0];
3287 cb->seq = macsec_generation;
3289 for_each_netdev(net, dev) {
3290 struct macsec_secy *secy;
3295 if (!netif_is_macsec(dev))
3298 secy = &macsec_priv(dev)->secy;
3299 if (dump_secy(secy, dev, skb, cb) < 0)
3311 static const struct genl_small_ops macsec_genl_ops[] = {
3313 .cmd = MACSEC_CMD_GET_TXSC,
3314 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3315 .dumpit = macsec_dump_txsc,
3318 .cmd = MACSEC_CMD_ADD_RXSC,
3319 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3320 .doit = macsec_add_rxsc,
3321 .flags = GENL_ADMIN_PERM,
3324 .cmd = MACSEC_CMD_DEL_RXSC,
3325 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3326 .doit = macsec_del_rxsc,
3327 .flags = GENL_ADMIN_PERM,
3330 .cmd = MACSEC_CMD_UPD_RXSC,
3331 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3332 .doit = macsec_upd_rxsc,
3333 .flags = GENL_ADMIN_PERM,
3336 .cmd = MACSEC_CMD_ADD_TXSA,
3337 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3338 .doit = macsec_add_txsa,
3339 .flags = GENL_ADMIN_PERM,
3342 .cmd = MACSEC_CMD_DEL_TXSA,
3343 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3344 .doit = macsec_del_txsa,
3345 .flags = GENL_ADMIN_PERM,
3348 .cmd = MACSEC_CMD_UPD_TXSA,
3349 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3350 .doit = macsec_upd_txsa,
3351 .flags = GENL_ADMIN_PERM,
3354 .cmd = MACSEC_CMD_ADD_RXSA,
3355 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3356 .doit = macsec_add_rxsa,
3357 .flags = GENL_ADMIN_PERM,
3360 .cmd = MACSEC_CMD_DEL_RXSA,
3361 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3362 .doit = macsec_del_rxsa,
3363 .flags = GENL_ADMIN_PERM,
3366 .cmd = MACSEC_CMD_UPD_RXSA,
3367 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3368 .doit = macsec_upd_rxsa,
3369 .flags = GENL_ADMIN_PERM,
3372 .cmd = MACSEC_CMD_UPD_OFFLOAD,
3373 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3374 .doit = macsec_upd_offload,
3375 .flags = GENL_ADMIN_PERM,
3379 static struct genl_family macsec_fam __ro_after_init = {
3380 .name = MACSEC_GENL_NAME,
3382 .version = MACSEC_GENL_VERSION,
3383 .maxattr = MACSEC_ATTR_MAX,
3384 .policy = macsec_genl_policy,
3386 .module = THIS_MODULE,
3387 .small_ops = macsec_genl_ops,
3388 .n_small_ops = ARRAY_SIZE(macsec_genl_ops),
3389 .resv_start_op = MACSEC_CMD_UPD_OFFLOAD + 1,
3392 static netdev_tx_t macsec_start_xmit(struct sk_buff *skb,
3393 struct net_device *dev)
3395 struct macsec_dev *macsec = netdev_priv(dev);
3396 struct macsec_secy *secy = &macsec->secy;
3397 struct pcpu_secy_stats *secy_stats;
3400 if (macsec_is_offloaded(netdev_priv(dev))) {
3401 struct metadata_dst *md_dst = secy->tx_sc.md_dst;
3404 dst_hold(&md_dst->dst);
3405 skb_dst_set(skb, &md_dst->dst);
3406 skb->dev = macsec->real_dev;
3407 return dev_queue_xmit(skb);
3411 if (!secy->protect_frames) {
3412 secy_stats = this_cpu_ptr(macsec->stats);
3413 u64_stats_update_begin(&secy_stats->syncp);
3414 secy_stats->stats.OutPktsUntagged++;
3415 u64_stats_update_end(&secy_stats->syncp);
3416 skb->dev = macsec->real_dev;
3418 ret = dev_queue_xmit(skb);
3419 count_tx(dev, ret, len);
3423 if (!secy->operational) {
3425 DEV_STATS_INC(dev, tx_dropped);
3426 return NETDEV_TX_OK;
3430 skb = macsec_encrypt(skb, dev);
3432 if (PTR_ERR(skb) != -EINPROGRESS)
3433 DEV_STATS_INC(dev, tx_dropped);
3434 return NETDEV_TX_OK;
3437 macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa);
3439 macsec_encrypt_finish(skb, dev);
3440 ret = dev_queue_xmit(skb);
3441 count_tx(dev, ret, len);
3445 #define MACSEC_FEATURES \
3446 (NETIF_F_SG | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST)
3448 static int macsec_dev_init(struct net_device *dev)
3450 struct macsec_dev *macsec = macsec_priv(dev);
3451 struct net_device *real_dev = macsec->real_dev;
3454 dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
3458 err = gro_cells_init(&macsec->gro_cells, dev);
3460 free_percpu(dev->tstats);
3464 dev->features = real_dev->features & MACSEC_FEATURES;
3465 dev->features |= NETIF_F_LLTX | NETIF_F_GSO_SOFTWARE;
3467 dev->needed_headroom = real_dev->needed_headroom +
3468 MACSEC_NEEDED_HEADROOM;
3469 dev->needed_tailroom = real_dev->needed_tailroom +
3470 MACSEC_NEEDED_TAILROOM;
3472 if (is_zero_ether_addr(dev->dev_addr))
3473 eth_hw_addr_inherit(dev, real_dev);
3474 if (is_zero_ether_addr(dev->broadcast))
3475 memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len);
3477 /* Get macsec's reference to real_dev */
3478 netdev_hold(real_dev, &macsec->dev_tracker, GFP_KERNEL);
3483 static void macsec_dev_uninit(struct net_device *dev)
3485 struct macsec_dev *macsec = macsec_priv(dev);
3487 gro_cells_destroy(&macsec->gro_cells);
3488 free_percpu(dev->tstats);
3491 static netdev_features_t macsec_fix_features(struct net_device *dev,
3492 netdev_features_t features)
3494 struct macsec_dev *macsec = macsec_priv(dev);
3495 struct net_device *real_dev = macsec->real_dev;
3497 features &= (real_dev->features & MACSEC_FEATURES) |
3498 NETIF_F_GSO_SOFTWARE | NETIF_F_SOFT_FEATURES;
3499 features |= NETIF_F_LLTX;
3504 static int macsec_dev_open(struct net_device *dev)
3506 struct macsec_dev *macsec = macsec_priv(dev);
3507 struct net_device *real_dev = macsec->real_dev;
3510 err = dev_uc_add(real_dev, dev->dev_addr);
3514 if (dev->flags & IFF_ALLMULTI) {
3515 err = dev_set_allmulti(real_dev, 1);
3520 if (dev->flags & IFF_PROMISC) {
3521 err = dev_set_promiscuity(real_dev, 1);
3523 goto clear_allmulti;
3526 /* If h/w offloading is available, propagate to the device */
3527 if (macsec_is_offloaded(macsec)) {
3528 const struct macsec_ops *ops;
3529 struct macsec_context ctx;
3531 ops = macsec_get_ops(netdev_priv(dev), &ctx);
3534 goto clear_allmulti;
3537 ctx.secy = &macsec->secy;
3538 err = macsec_offload(ops->mdo_dev_open, &ctx);
3540 goto clear_allmulti;
3543 if (netif_carrier_ok(real_dev))
3544 netif_carrier_on(dev);
3548 if (dev->flags & IFF_ALLMULTI)
3549 dev_set_allmulti(real_dev, -1);
3551 dev_uc_del(real_dev, dev->dev_addr);
3552 netif_carrier_off(dev);
3556 static int macsec_dev_stop(struct net_device *dev)
3558 struct macsec_dev *macsec = macsec_priv(dev);
3559 struct net_device *real_dev = macsec->real_dev;
3561 netif_carrier_off(dev);
3563 /* If h/w offloading is available, propagate to the device */
3564 if (macsec_is_offloaded(macsec)) {
3565 const struct macsec_ops *ops;
3566 struct macsec_context ctx;
3568 ops = macsec_get_ops(macsec, &ctx);
3570 ctx.secy = &macsec->secy;
3571 macsec_offload(ops->mdo_dev_stop, &ctx);
3575 dev_mc_unsync(real_dev, dev);
3576 dev_uc_unsync(real_dev, dev);
3578 if (dev->flags & IFF_ALLMULTI)
3579 dev_set_allmulti(real_dev, -1);
3581 if (dev->flags & IFF_PROMISC)
3582 dev_set_promiscuity(real_dev, -1);
3584 dev_uc_del(real_dev, dev->dev_addr);
3589 static void macsec_dev_change_rx_flags(struct net_device *dev, int change)
3591 struct net_device *real_dev = macsec_priv(dev)->real_dev;
3593 if (!(dev->flags & IFF_UP))
3596 if (change & IFF_ALLMULTI)
3597 dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1);
3599 if (change & IFF_PROMISC)
3600 dev_set_promiscuity(real_dev,
3601 dev->flags & IFF_PROMISC ? 1 : -1);
3604 static void macsec_dev_set_rx_mode(struct net_device *dev)
3606 struct net_device *real_dev = macsec_priv(dev)->real_dev;
3608 dev_mc_sync(real_dev, dev);
3609 dev_uc_sync(real_dev, dev);
3612 static int macsec_set_mac_address(struct net_device *dev, void *p)
3614 struct macsec_dev *macsec = macsec_priv(dev);
3615 struct net_device *real_dev = macsec->real_dev;
3616 struct sockaddr *addr = p;
3619 if (!is_valid_ether_addr(addr->sa_data))
3620 return -EADDRNOTAVAIL;
3622 if (!(dev->flags & IFF_UP))
3625 err = dev_uc_add(real_dev, addr->sa_data);
3629 dev_uc_del(real_dev, dev->dev_addr);
3632 eth_hw_addr_set(dev, addr->sa_data);
3634 /* If h/w offloading is available, propagate to the device */
3635 if (macsec_is_offloaded(macsec)) {
3636 const struct macsec_ops *ops;
3637 struct macsec_context ctx;
3639 ops = macsec_get_ops(macsec, &ctx);
3641 ctx.secy = &macsec->secy;
3642 macsec_offload(ops->mdo_upd_secy, &ctx);
3649 static int macsec_change_mtu(struct net_device *dev, int new_mtu)
3651 struct macsec_dev *macsec = macsec_priv(dev);
3652 unsigned int extra = macsec->secy.icv_len + macsec_extra_len(true);
3654 if (macsec->real_dev->mtu - extra < new_mtu)
3662 static void macsec_get_stats64(struct net_device *dev,
3663 struct rtnl_link_stats64 *s)
3668 dev_fetch_sw_netstats(s, dev->tstats);
3670 s->rx_dropped = atomic_long_read(&dev->stats.__rx_dropped);
3671 s->tx_dropped = atomic_long_read(&dev->stats.__tx_dropped);
3672 s->rx_errors = atomic_long_read(&dev->stats.__rx_errors);
3675 static int macsec_get_iflink(const struct net_device *dev)
3677 return macsec_priv(dev)->real_dev->ifindex;
3680 static const struct net_device_ops macsec_netdev_ops = {
3681 .ndo_init = macsec_dev_init,
3682 .ndo_uninit = macsec_dev_uninit,
3683 .ndo_open = macsec_dev_open,
3684 .ndo_stop = macsec_dev_stop,
3685 .ndo_fix_features = macsec_fix_features,
3686 .ndo_change_mtu = macsec_change_mtu,
3687 .ndo_set_rx_mode = macsec_dev_set_rx_mode,
3688 .ndo_change_rx_flags = macsec_dev_change_rx_flags,
3689 .ndo_set_mac_address = macsec_set_mac_address,
3690 .ndo_start_xmit = macsec_start_xmit,
3691 .ndo_get_stats64 = macsec_get_stats64,
3692 .ndo_get_iflink = macsec_get_iflink,
3695 static const struct device_type macsec_type = {
3699 static const struct nla_policy macsec_rtnl_policy[IFLA_MACSEC_MAX + 1] = {
3700 [IFLA_MACSEC_SCI] = { .type = NLA_U64 },
3701 [IFLA_MACSEC_PORT] = { .type = NLA_U16 },
3702 [IFLA_MACSEC_ICV_LEN] = { .type = NLA_U8 },
3703 [IFLA_MACSEC_CIPHER_SUITE] = { .type = NLA_U64 },
3704 [IFLA_MACSEC_WINDOW] = { .type = NLA_U32 },
3705 [IFLA_MACSEC_ENCODING_SA] = { .type = NLA_U8 },
3706 [IFLA_MACSEC_ENCRYPT] = { .type = NLA_U8 },
3707 [IFLA_MACSEC_PROTECT] = { .type = NLA_U8 },
3708 [IFLA_MACSEC_INC_SCI] = { .type = NLA_U8 },
3709 [IFLA_MACSEC_ES] = { .type = NLA_U8 },
3710 [IFLA_MACSEC_SCB] = { .type = NLA_U8 },
3711 [IFLA_MACSEC_REPLAY_PROTECT] = { .type = NLA_U8 },
3712 [IFLA_MACSEC_VALIDATION] = { .type = NLA_U8 },
3713 [IFLA_MACSEC_OFFLOAD] = { .type = NLA_U8 },
3716 static void macsec_free_netdev(struct net_device *dev)
3718 struct macsec_dev *macsec = macsec_priv(dev);
3720 if (macsec->secy.tx_sc.md_dst)
3721 metadata_dst_free(macsec->secy.tx_sc.md_dst);
3722 free_percpu(macsec->stats);
3723 free_percpu(macsec->secy.tx_sc.stats);
3725 /* Get rid of the macsec's reference to real_dev */
3726 netdev_put(macsec->real_dev, &macsec->dev_tracker);
3729 static void macsec_setup(struct net_device *dev)
3733 dev->max_mtu = ETH_MAX_MTU;
3734 dev->priv_flags |= IFF_NO_QUEUE;
3735 dev->netdev_ops = &macsec_netdev_ops;
3736 dev->needs_free_netdev = true;
3737 dev->priv_destructor = macsec_free_netdev;
3738 SET_NETDEV_DEVTYPE(dev, &macsec_type);
3740 eth_zero_addr(dev->broadcast);
3743 static int macsec_changelink_common(struct net_device *dev,
3744 struct nlattr *data[])
3746 struct macsec_secy *secy;
3747 struct macsec_tx_sc *tx_sc;
3749 secy = &macsec_priv(dev)->secy;
3750 tx_sc = &secy->tx_sc;
3752 if (data[IFLA_MACSEC_ENCODING_SA]) {
3753 struct macsec_tx_sa *tx_sa;
3755 tx_sc->encoding_sa = nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]);
3756 tx_sa = rtnl_dereference(tx_sc->sa[tx_sc->encoding_sa]);
3758 secy->operational = tx_sa && tx_sa->active;
3761 if (data[IFLA_MACSEC_ENCRYPT])
3762 tx_sc->encrypt = !!nla_get_u8(data[IFLA_MACSEC_ENCRYPT]);
3764 if (data[IFLA_MACSEC_PROTECT])
3765 secy->protect_frames = !!nla_get_u8(data[IFLA_MACSEC_PROTECT]);
3767 if (data[IFLA_MACSEC_INC_SCI])
3768 tx_sc->send_sci = !!nla_get_u8(data[IFLA_MACSEC_INC_SCI]);
3770 if (data[IFLA_MACSEC_ES])
3771 tx_sc->end_station = !!nla_get_u8(data[IFLA_MACSEC_ES]);
3773 if (data[IFLA_MACSEC_SCB])
3774 tx_sc->scb = !!nla_get_u8(data[IFLA_MACSEC_SCB]);
3776 if (data[IFLA_MACSEC_REPLAY_PROTECT])
3777 secy->replay_protect = !!nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT]);
3779 if (data[IFLA_MACSEC_VALIDATION])
3780 secy->validate_frames = nla_get_u8(data[IFLA_MACSEC_VALIDATION]);
3782 if (data[IFLA_MACSEC_CIPHER_SUITE]) {
3783 switch (nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE])) {
3784 case MACSEC_CIPHER_ID_GCM_AES_128:
3785 case MACSEC_DEFAULT_CIPHER_ID:
3786 secy->key_len = MACSEC_GCM_AES_128_SAK_LEN;
3789 case MACSEC_CIPHER_ID_GCM_AES_256:
3790 secy->key_len = MACSEC_GCM_AES_256_SAK_LEN;
3793 case MACSEC_CIPHER_ID_GCM_AES_XPN_128:
3794 secy->key_len = MACSEC_GCM_AES_128_SAK_LEN;
3797 case MACSEC_CIPHER_ID_GCM_AES_XPN_256:
3798 secy->key_len = MACSEC_GCM_AES_256_SAK_LEN;
3806 if (data[IFLA_MACSEC_WINDOW]) {
3807 secy->replay_window = nla_get_u32(data[IFLA_MACSEC_WINDOW]);
3809 /* IEEE 802.1AEbw-2013 10.7.8 - maximum replay window
3810 * for XPN cipher suites */
3812 secy->replay_window > MACSEC_XPN_MAX_REPLAY_WINDOW)
3819 static int macsec_changelink(struct net_device *dev, struct nlattr *tb[],
3820 struct nlattr *data[],
3821 struct netlink_ext_ack *extack)
3823 struct macsec_dev *macsec = macsec_priv(dev);
3824 bool macsec_offload_state_change = false;
3825 enum macsec_offload offload;
3826 struct macsec_tx_sc tx_sc;
3827 struct macsec_secy secy;
3833 if (data[IFLA_MACSEC_CIPHER_SUITE] ||
3834 data[IFLA_MACSEC_ICV_LEN] ||
3835 data[IFLA_MACSEC_SCI] ||
3836 data[IFLA_MACSEC_PORT])
3839 /* Keep a copy of unmodified secy and tx_sc, in case the offload
3840 * propagation fails, to revert macsec_changelink_common.
3842 memcpy(&secy, &macsec->secy, sizeof(secy));
3843 memcpy(&tx_sc, &macsec->secy.tx_sc, sizeof(tx_sc));
3845 ret = macsec_changelink_common(dev, data);
3849 if (data[IFLA_MACSEC_OFFLOAD]) {
3850 offload = nla_get_u8(data[IFLA_MACSEC_OFFLOAD]);
3851 if (macsec->offload != offload) {
3852 macsec_offload_state_change = true;
3853 ret = macsec_update_offload(dev, offload);
3859 /* If h/w offloading is available, propagate to the device */
3860 if (!macsec_offload_state_change && macsec_is_offloaded(macsec)) {
3861 const struct macsec_ops *ops;
3862 struct macsec_context ctx;
3864 ops = macsec_get_ops(netdev_priv(dev), &ctx);
3870 ctx.secy = &macsec->secy;
3871 ret = macsec_offload(ops->mdo_upd_secy, &ctx);
3879 memcpy(&macsec->secy.tx_sc, &tx_sc, sizeof(tx_sc));
3880 memcpy(&macsec->secy, &secy, sizeof(secy));
3885 static void macsec_del_dev(struct macsec_dev *macsec)
3889 while (macsec->secy.rx_sc) {
3890 struct macsec_rx_sc *rx_sc = rtnl_dereference(macsec->secy.rx_sc);
3892 rcu_assign_pointer(macsec->secy.rx_sc, rx_sc->next);
3896 for (i = 0; i < MACSEC_NUM_AN; i++) {
3897 struct macsec_tx_sa *sa = rtnl_dereference(macsec->secy.tx_sc.sa[i]);
3900 RCU_INIT_POINTER(macsec->secy.tx_sc.sa[i], NULL);
3906 static void macsec_common_dellink(struct net_device *dev, struct list_head *head)
3908 struct macsec_dev *macsec = macsec_priv(dev);
3909 struct net_device *real_dev = macsec->real_dev;
3911 /* If h/w offloading is available, propagate to the device */
3912 if (macsec_is_offloaded(macsec)) {
3913 const struct macsec_ops *ops;
3914 struct macsec_context ctx;
3916 ops = macsec_get_ops(netdev_priv(dev), &ctx);
3918 ctx.secy = &macsec->secy;
3919 macsec_offload(ops->mdo_del_secy, &ctx);
3923 unregister_netdevice_queue(dev, head);
3924 list_del_rcu(&macsec->secys);
3925 macsec_del_dev(macsec);
3926 netdev_upper_dev_unlink(real_dev, dev);
3928 macsec_generation++;
3931 static void macsec_dellink(struct net_device *dev, struct list_head *head)
3933 struct macsec_dev *macsec = macsec_priv(dev);
3934 struct net_device *real_dev = macsec->real_dev;
3935 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
3937 macsec_common_dellink(dev, head);
3939 if (list_empty(&rxd->secys)) {
3940 netdev_rx_handler_unregister(real_dev);
3945 static int register_macsec_dev(struct net_device *real_dev,
3946 struct net_device *dev)
3948 struct macsec_dev *macsec = macsec_priv(dev);
3949 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
3954 rxd = kmalloc(sizeof(*rxd), GFP_KERNEL);
3958 INIT_LIST_HEAD(&rxd->secys);
3960 err = netdev_rx_handler_register(real_dev, macsec_handle_frame,
3968 list_add_tail_rcu(&macsec->secys, &rxd->secys);
3972 static bool sci_exists(struct net_device *dev, sci_t sci)
3974 struct macsec_rxh_data *rxd = macsec_data_rtnl(dev);
3975 struct macsec_dev *macsec;
3977 list_for_each_entry(macsec, &rxd->secys, secys) {
3978 if (macsec->secy.sci == sci)
3985 static sci_t dev_to_sci(struct net_device *dev, __be16 port)
3987 return make_sci(dev->dev_addr, port);
3990 static int macsec_add_dev(struct net_device *dev, sci_t sci, u8 icv_len)
3992 struct macsec_dev *macsec = macsec_priv(dev);
3993 struct macsec_secy *secy = &macsec->secy;
3995 macsec->stats = netdev_alloc_pcpu_stats(struct pcpu_secy_stats);
3999 secy->tx_sc.stats = netdev_alloc_pcpu_stats(struct pcpu_tx_sc_stats);
4000 if (!secy->tx_sc.stats)
4003 secy->tx_sc.md_dst = metadata_dst_alloc(0, METADATA_MACSEC, GFP_KERNEL);
4004 if (!secy->tx_sc.md_dst)
4005 /* macsec and secy percpu stats will be freed when unregistering
4006 * net_device in macsec_free_netdev()
4010 if (sci == MACSEC_UNDEF_SCI)
4011 sci = dev_to_sci(dev, MACSEC_PORT_ES);
4014 secy->operational = true;
4015 secy->key_len = DEFAULT_SAK_LEN;
4016 secy->icv_len = icv_len;
4017 secy->validate_frames = MACSEC_VALIDATE_DEFAULT;
4018 secy->protect_frames = true;
4019 secy->replay_protect = false;
4020 secy->xpn = DEFAULT_XPN;
4023 secy->tx_sc.md_dst->u.macsec_info.sci = sci;
4024 secy->tx_sc.active = true;
4025 secy->tx_sc.encoding_sa = DEFAULT_ENCODING_SA;
4026 secy->tx_sc.encrypt = DEFAULT_ENCRYPT;
4027 secy->tx_sc.send_sci = DEFAULT_SEND_SCI;
4028 secy->tx_sc.end_station = false;
4029 secy->tx_sc.scb = false;
4034 static struct lock_class_key macsec_netdev_addr_lock_key;
4036 static int macsec_newlink(struct net *net, struct net_device *dev,
4037 struct nlattr *tb[], struct nlattr *data[],
4038 struct netlink_ext_ack *extack)
4040 struct macsec_dev *macsec = macsec_priv(dev);
4041 rx_handler_func_t *rx_handler;
4042 u8 icv_len = MACSEC_DEFAULT_ICV_LEN;
4043 struct net_device *real_dev;
4049 real_dev = __dev_get_by_index(net, nla_get_u32(tb[IFLA_LINK]));
4052 if (real_dev->type != ARPHRD_ETHER)
4055 dev->priv_flags |= IFF_MACSEC;
4057 macsec->real_dev = real_dev;
4059 if (data && data[IFLA_MACSEC_OFFLOAD])
4060 macsec->offload = nla_get_offload(data[IFLA_MACSEC_OFFLOAD]);
4062 /* MACsec offloading is off by default */
4063 macsec->offload = MACSEC_OFFLOAD_OFF;
4065 /* Check if the offloading mode is supported by the underlying layers */
4066 if (macsec->offload != MACSEC_OFFLOAD_OFF &&
4067 !macsec_check_offload(macsec->offload, macsec))
4070 /* send_sci must be set to true when transmit sci explicitly is set */
4071 if ((data && data[IFLA_MACSEC_SCI]) &&
4072 (data && data[IFLA_MACSEC_INC_SCI])) {
4073 u8 send_sci = !!nla_get_u8(data[IFLA_MACSEC_INC_SCI]);
4079 if (data && data[IFLA_MACSEC_ICV_LEN])
4080 icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]);
4081 mtu = real_dev->mtu - icv_len - macsec_extra_len(true);
4087 rx_handler = rtnl_dereference(real_dev->rx_handler);
4088 if (rx_handler && rx_handler != macsec_handle_frame)
4091 err = register_netdevice(dev);
4095 netdev_lockdep_set_classes(dev);
4096 lockdep_set_class(&dev->addr_list_lock,
4097 &macsec_netdev_addr_lock_key);
4099 err = netdev_upper_dev_link(real_dev, dev, extack);
4103 /* need to be already registered so that ->init has run and
4104 * the MAC addr is set
4106 if (data && data[IFLA_MACSEC_SCI])
4107 sci = nla_get_sci(data[IFLA_MACSEC_SCI]);
4108 else if (data && data[IFLA_MACSEC_PORT])
4109 sci = dev_to_sci(dev, nla_get_be16(data[IFLA_MACSEC_PORT]));
4111 sci = dev_to_sci(dev, MACSEC_PORT_ES);
4113 if (rx_handler && sci_exists(real_dev, sci)) {
4118 err = macsec_add_dev(dev, sci, icv_len);
4123 err = macsec_changelink_common(dev, data);
4128 /* If h/w offloading is available, propagate to the device */
4129 if (macsec_is_offloaded(macsec)) {
4130 const struct macsec_ops *ops;
4131 struct macsec_context ctx;
4133 ops = macsec_get_ops(macsec, &ctx);
4135 ctx.secy = &macsec->secy;
4136 err = macsec_offload(ops->mdo_add_secy, &ctx);
4142 err = register_macsec_dev(real_dev, dev);
4146 netif_stacked_transfer_operstate(real_dev, dev);
4147 linkwatch_fire_event(dev);
4149 macsec_generation++;
4154 macsec_del_dev(macsec);
4156 netdev_upper_dev_unlink(real_dev, dev);
4158 unregister_netdevice(dev);
4162 static int macsec_validate_attr(struct nlattr *tb[], struct nlattr *data[],
4163 struct netlink_ext_ack *extack)
4165 u64 csid = MACSEC_DEFAULT_CIPHER_ID;
4166 u8 icv_len = MACSEC_DEFAULT_ICV_LEN;
4173 if (data[IFLA_MACSEC_CIPHER_SUITE])
4174 csid = nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE]);
4176 if (data[IFLA_MACSEC_ICV_LEN]) {
4177 icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]);
4178 if (icv_len != MACSEC_DEFAULT_ICV_LEN) {
4179 char dummy_key[DEFAULT_SAK_LEN] = { 0 };
4180 struct crypto_aead *dummy_tfm;
4182 dummy_tfm = macsec_alloc_tfm(dummy_key,
4185 if (IS_ERR(dummy_tfm))
4186 return PTR_ERR(dummy_tfm);
4187 crypto_free_aead(dummy_tfm);
4192 case MACSEC_CIPHER_ID_GCM_AES_128:
4193 case MACSEC_CIPHER_ID_GCM_AES_256:
4194 case MACSEC_CIPHER_ID_GCM_AES_XPN_128:
4195 case MACSEC_CIPHER_ID_GCM_AES_XPN_256:
4196 case MACSEC_DEFAULT_CIPHER_ID:
4197 if (icv_len < MACSEC_MIN_ICV_LEN ||
4198 icv_len > MACSEC_STD_ICV_LEN)
4205 if (data[IFLA_MACSEC_ENCODING_SA]) {
4206 if (nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]) >= MACSEC_NUM_AN)
4210 for (flag = IFLA_MACSEC_ENCODING_SA + 1;
4211 flag < IFLA_MACSEC_VALIDATION;
4214 if (nla_get_u8(data[flag]) > 1)
4219 es = data[IFLA_MACSEC_ES] ? nla_get_u8(data[IFLA_MACSEC_ES]) : false;
4220 sci = data[IFLA_MACSEC_INC_SCI] ? nla_get_u8(data[IFLA_MACSEC_INC_SCI]) : false;
4221 scb = data[IFLA_MACSEC_SCB] ? nla_get_u8(data[IFLA_MACSEC_SCB]) : false;
4223 if ((sci && (scb || es)) || (scb && es))
4226 if (data[IFLA_MACSEC_VALIDATION] &&
4227 nla_get_u8(data[IFLA_MACSEC_VALIDATION]) > MACSEC_VALIDATE_MAX)
4230 if ((data[IFLA_MACSEC_REPLAY_PROTECT] &&
4231 nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT])) &&
4232 !data[IFLA_MACSEC_WINDOW])
4238 static struct net *macsec_get_link_net(const struct net_device *dev)
4240 return dev_net(macsec_priv(dev)->real_dev);
4243 static size_t macsec_get_size(const struct net_device *dev)
4245 return nla_total_size_64bit(8) + /* IFLA_MACSEC_SCI */
4246 nla_total_size(1) + /* IFLA_MACSEC_ICV_LEN */
4247 nla_total_size_64bit(8) + /* IFLA_MACSEC_CIPHER_SUITE */
4248 nla_total_size(4) + /* IFLA_MACSEC_WINDOW */
4249 nla_total_size(1) + /* IFLA_MACSEC_ENCODING_SA */
4250 nla_total_size(1) + /* IFLA_MACSEC_ENCRYPT */
4251 nla_total_size(1) + /* IFLA_MACSEC_PROTECT */
4252 nla_total_size(1) + /* IFLA_MACSEC_INC_SCI */
4253 nla_total_size(1) + /* IFLA_MACSEC_ES */
4254 nla_total_size(1) + /* IFLA_MACSEC_SCB */
4255 nla_total_size(1) + /* IFLA_MACSEC_REPLAY_PROTECT */
4256 nla_total_size(1) + /* IFLA_MACSEC_VALIDATION */
4257 nla_total_size(1) + /* IFLA_MACSEC_OFFLOAD */
4261 static int macsec_fill_info(struct sk_buff *skb,
4262 const struct net_device *dev)
4264 struct macsec_tx_sc *tx_sc;
4265 struct macsec_dev *macsec;
4266 struct macsec_secy *secy;
4269 macsec = macsec_priv(dev);
4270 secy = &macsec->secy;
4271 tx_sc = &secy->tx_sc;
4273 switch (secy->key_len) {
4274 case MACSEC_GCM_AES_128_SAK_LEN:
4275 csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_128 : MACSEC_DEFAULT_CIPHER_ID;
4277 case MACSEC_GCM_AES_256_SAK_LEN:
4278 csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_256 : MACSEC_CIPHER_ID_GCM_AES_256;
4281 goto nla_put_failure;
4284 if (nla_put_sci(skb, IFLA_MACSEC_SCI, secy->sci,
4286 nla_put_u8(skb, IFLA_MACSEC_ICV_LEN, secy->icv_len) ||
4287 nla_put_u64_64bit(skb, IFLA_MACSEC_CIPHER_SUITE,
4288 csid, IFLA_MACSEC_PAD) ||
4289 nla_put_u8(skb, IFLA_MACSEC_ENCODING_SA, tx_sc->encoding_sa) ||
4290 nla_put_u8(skb, IFLA_MACSEC_ENCRYPT, tx_sc->encrypt) ||
4291 nla_put_u8(skb, IFLA_MACSEC_PROTECT, secy->protect_frames) ||
4292 nla_put_u8(skb, IFLA_MACSEC_INC_SCI, tx_sc->send_sci) ||
4293 nla_put_u8(skb, IFLA_MACSEC_ES, tx_sc->end_station) ||
4294 nla_put_u8(skb, IFLA_MACSEC_SCB, tx_sc->scb) ||
4295 nla_put_u8(skb, IFLA_MACSEC_REPLAY_PROTECT, secy->replay_protect) ||
4296 nla_put_u8(skb, IFLA_MACSEC_VALIDATION, secy->validate_frames) ||
4297 nla_put_u8(skb, IFLA_MACSEC_OFFLOAD, macsec->offload) ||
4299 goto nla_put_failure;
4301 if (secy->replay_protect) {
4302 if (nla_put_u32(skb, IFLA_MACSEC_WINDOW, secy->replay_window))
4303 goto nla_put_failure;
4312 static struct rtnl_link_ops macsec_link_ops __read_mostly = {
4314 .priv_size = sizeof(struct macsec_dev),
4315 .maxtype = IFLA_MACSEC_MAX,
4316 .policy = macsec_rtnl_policy,
4317 .setup = macsec_setup,
4318 .validate = macsec_validate_attr,
4319 .newlink = macsec_newlink,
4320 .changelink = macsec_changelink,
4321 .dellink = macsec_dellink,
4322 .get_size = macsec_get_size,
4323 .fill_info = macsec_fill_info,
4324 .get_link_net = macsec_get_link_net,
4327 static bool is_macsec_master(struct net_device *dev)
4329 return rcu_access_pointer(dev->rx_handler) == macsec_handle_frame;
4332 static int macsec_notify(struct notifier_block *this, unsigned long event,
4335 struct net_device *real_dev = netdev_notifier_info_to_dev(ptr);
4338 if (!is_macsec_master(real_dev))
4344 case NETDEV_CHANGE: {
4345 struct macsec_dev *m, *n;
4346 struct macsec_rxh_data *rxd;
4348 rxd = macsec_data_rtnl(real_dev);
4349 list_for_each_entry_safe(m, n, &rxd->secys, secys) {
4350 struct net_device *dev = m->secy.netdev;
4352 netif_stacked_transfer_operstate(real_dev, dev);
4356 case NETDEV_UNREGISTER: {
4357 struct macsec_dev *m, *n;
4358 struct macsec_rxh_data *rxd;
4360 rxd = macsec_data_rtnl(real_dev);
4361 list_for_each_entry_safe(m, n, &rxd->secys, secys) {
4362 macsec_common_dellink(m->secy.netdev, &head);
4365 netdev_rx_handler_unregister(real_dev);
4368 unregister_netdevice_many(&head);
4371 case NETDEV_CHANGEMTU: {
4372 struct macsec_dev *m;
4373 struct macsec_rxh_data *rxd;
4375 rxd = macsec_data_rtnl(real_dev);
4376 list_for_each_entry(m, &rxd->secys, secys) {
4377 struct net_device *dev = m->secy.netdev;
4378 unsigned int mtu = real_dev->mtu - (m->secy.icv_len +
4379 macsec_extra_len(true));
4382 dev_set_mtu(dev, mtu);
4390 static struct notifier_block macsec_notifier = {
4391 .notifier_call = macsec_notify,
4394 static int __init macsec_init(void)
4398 pr_info("MACsec IEEE 802.1AE\n");
4399 err = register_netdevice_notifier(&macsec_notifier);
4403 err = rtnl_link_register(&macsec_link_ops);
4407 err = genl_register_family(&macsec_fam);
4414 rtnl_link_unregister(&macsec_link_ops);
4416 unregister_netdevice_notifier(&macsec_notifier);
4420 static void __exit macsec_exit(void)
4422 genl_unregister_family(&macsec_fam);
4423 rtnl_link_unregister(&macsec_link_ops);
4424 unregister_netdevice_notifier(&macsec_notifier);
4428 module_init(macsec_init);
4429 module_exit(macsec_exit);
4431 MODULE_ALIAS_RTNL_LINK("macsec");
4432 MODULE_ALIAS_GENL_FAMILY("macsec");
4434 MODULE_DESCRIPTION("MACsec IEEE 802.1AE");
4435 MODULE_LICENSE("GPL v2");