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(struct crypto_async_request *base, int err)
533 struct sk_buff *skb = base->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 secy->netdev->stats.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 secy->netdev->stats.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(struct crypto_async_request *base, int err)
840 struct sk_buff *skb = base->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 if (md_dst && md_dst->type == METADATA_MACSEC &&
1025 (!find_rx_sc(&macsec->secy, md_dst->u.macsec_info.sci)))
1028 if (ether_addr_equal_64bits(hdr->h_dest,
1030 /* exact match, divert skb to this port */
1032 skb->pkt_type = PACKET_HOST;
1033 ret = RX_HANDLER_ANOTHER;
1035 } else if (is_multicast_ether_addr_64bits(
1037 /* multicast frame, deliver on this port too */
1038 nskb = skb_clone(skb, GFP_ATOMIC);
1043 if (ether_addr_equal_64bits(hdr->h_dest,
1045 nskb->pkt_type = PACKET_BROADCAST;
1047 nskb->pkt_type = PACKET_MULTICAST;
1054 /* 10.6 If the management control validateFrames is not
1055 * Strict, frames without a SecTAG are received, counted, and
1056 * delivered to the Controlled Port
1058 if (macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) {
1059 u64_stats_update_begin(&secy_stats->syncp);
1060 secy_stats->stats.InPktsNoTag++;
1061 u64_stats_update_end(&secy_stats->syncp);
1062 macsec->secy.netdev->stats.rx_dropped++;
1066 /* deliver on this port */
1067 nskb = skb_clone(skb, GFP_ATOMIC);
1073 if (__netif_rx(nskb) == NET_RX_SUCCESS) {
1074 u64_stats_update_begin(&secy_stats->syncp);
1075 secy_stats->stats.InPktsUntagged++;
1076 u64_stats_update_end(&secy_stats->syncp);
1085 static rx_handler_result_t macsec_handle_frame(struct sk_buff **pskb)
1087 struct sk_buff *skb = *pskb;
1088 struct net_device *dev = skb->dev;
1089 struct macsec_eth_header *hdr;
1090 struct macsec_secy *secy = NULL;
1091 struct macsec_rx_sc *rx_sc;
1092 struct macsec_rx_sa *rx_sa;
1093 struct macsec_rxh_data *rxd;
1094 struct macsec_dev *macsec;
1099 struct pcpu_rx_sc_stats *rxsc_stats;
1100 struct pcpu_secy_stats *secy_stats;
1104 if (skb_headroom(skb) < ETH_HLEN)
1107 hdr = macsec_ethhdr(skb);
1108 if (hdr->eth.h_proto != htons(ETH_P_MACSEC))
1109 return handle_not_macsec(skb);
1111 skb = skb_unshare(skb, GFP_ATOMIC);
1114 return RX_HANDLER_CONSUMED;
1116 pulled_sci = pskb_may_pull(skb, macsec_extra_len(true));
1118 if (!pskb_may_pull(skb, macsec_extra_len(false)))
1122 hdr = macsec_ethhdr(skb);
1124 /* Frames with a SecTAG that has the TCI E bit set but the C
1125 * bit clear are discarded, as this reserved encoding is used
1126 * to identify frames with a SecTAG that are not to be
1127 * delivered to the Controlled Port.
1129 if ((hdr->tci_an & (MACSEC_TCI_C | MACSEC_TCI_E)) == MACSEC_TCI_E)
1130 return RX_HANDLER_PASS;
1132 /* now, pull the extra length */
1133 if (hdr->tci_an & MACSEC_TCI_SC) {
1138 /* ethernet header is part of crypto processing */
1139 skb_push(skb, ETH_HLEN);
1141 macsec_skb_cb(skb)->has_sci = !!(hdr->tci_an & MACSEC_TCI_SC);
1142 macsec_skb_cb(skb)->assoc_num = hdr->tci_an & MACSEC_AN_MASK;
1143 sci = macsec_frame_sci(hdr, macsec_skb_cb(skb)->has_sci);
1146 rxd = macsec_data_rcu(skb->dev);
1148 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1149 struct macsec_rx_sc *sc = find_rx_sc(&macsec->secy, sci);
1151 sc = sc ? macsec_rxsc_get(sc) : NULL;
1154 secy = &macsec->secy;
1164 macsec = macsec_priv(dev);
1165 secy_stats = this_cpu_ptr(macsec->stats);
1166 rxsc_stats = this_cpu_ptr(rx_sc->stats);
1168 if (!macsec_validate_skb(skb, secy->icv_len, secy->xpn)) {
1169 u64_stats_update_begin(&secy_stats->syncp);
1170 secy_stats->stats.InPktsBadTag++;
1171 u64_stats_update_end(&secy_stats->syncp);
1172 secy->netdev->stats.rx_errors++;
1176 rx_sa = macsec_rxsa_get(rx_sc->sa[macsec_skb_cb(skb)->assoc_num]);
1178 /* 10.6.1 if the SA is not in use */
1180 /* If validateFrames is Strict or the C bit in the
1181 * SecTAG is set, discard
1183 struct macsec_rx_sa *active_rx_sa = macsec_active_rxsa_get(rx_sc);
1184 if (hdr->tci_an & MACSEC_TCI_C ||
1185 secy->validate_frames == MACSEC_VALIDATE_STRICT) {
1186 u64_stats_update_begin(&rxsc_stats->syncp);
1187 rxsc_stats->stats.InPktsNotUsingSA++;
1188 u64_stats_update_end(&rxsc_stats->syncp);
1189 secy->netdev->stats.rx_errors++;
1191 this_cpu_inc(active_rx_sa->stats->InPktsNotUsingSA);
1195 /* not Strict, the frame (with the SecTAG and ICV
1196 * removed) is delivered to the Controlled Port.
1198 u64_stats_update_begin(&rxsc_stats->syncp);
1199 rxsc_stats->stats.InPktsUnusedSA++;
1200 u64_stats_update_end(&rxsc_stats->syncp);
1202 this_cpu_inc(active_rx_sa->stats->InPktsUnusedSA);
1206 /* First, PN check to avoid decrypting obviously wrong packets */
1207 hdr_pn = ntohl(hdr->packet_number);
1208 if (secy->replay_protect) {
1211 spin_lock(&rx_sa->lock);
1212 late = rx_sa->next_pn_halves.lower >= secy->replay_window &&
1213 hdr_pn < (rx_sa->next_pn_halves.lower - secy->replay_window);
1216 late = late && pn_same_half(rx_sa->next_pn_halves.lower, hdr_pn);
1217 spin_unlock(&rx_sa->lock);
1220 u64_stats_update_begin(&rxsc_stats->syncp);
1221 rxsc_stats->stats.InPktsLate++;
1222 u64_stats_update_end(&rxsc_stats->syncp);
1223 macsec->secy.netdev->stats.rx_dropped++;
1228 macsec_skb_cb(skb)->rx_sa = rx_sa;
1230 /* Disabled && !changed text => skip validation */
1231 if (hdr->tci_an & MACSEC_TCI_C ||
1232 secy->validate_frames != MACSEC_VALIDATE_DISABLED)
1233 skb = macsec_decrypt(skb, dev, rx_sa, sci, secy);
1236 /* the decrypt callback needs the reference */
1237 if (PTR_ERR(skb) != -EINPROGRESS) {
1238 macsec_rxsa_put(rx_sa);
1239 macsec_rxsc_put(rx_sc);
1243 return RX_HANDLER_CONSUMED;
1246 if (!macsec_post_decrypt(skb, secy, hdr_pn))
1250 macsec_finalize_skb(skb, secy->icv_len,
1251 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
1253 macsec_reset_skb(skb, secy->netdev);
1256 macsec_rxsa_put(rx_sa);
1257 macsec_rxsc_put(rx_sc);
1260 ret = gro_cells_receive(&macsec->gro_cells, skb);
1261 if (ret == NET_RX_SUCCESS)
1264 macsec->secy.netdev->stats.rx_dropped++;
1269 return RX_HANDLER_CONSUMED;
1272 macsec_rxsa_put(rx_sa);
1274 macsec_rxsc_put(rx_sc);
1279 return RX_HANDLER_CONSUMED;
1282 /* 10.6.1 if the SC is not found */
1283 cbit = !!(hdr->tci_an & MACSEC_TCI_C);
1285 macsec_finalize_skb(skb, MACSEC_DEFAULT_ICV_LEN,
1286 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
1288 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1289 struct sk_buff *nskb;
1291 secy_stats = this_cpu_ptr(macsec->stats);
1293 /* If validateFrames is Strict or the C bit in the
1294 * SecTAG is set, discard
1297 macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) {
1298 u64_stats_update_begin(&secy_stats->syncp);
1299 secy_stats->stats.InPktsNoSCI++;
1300 u64_stats_update_end(&secy_stats->syncp);
1301 macsec->secy.netdev->stats.rx_errors++;
1305 /* not strict, the frame (with the SecTAG and ICV
1306 * removed) is delivered to the Controlled Port.
1308 nskb = skb_clone(skb, GFP_ATOMIC);
1312 macsec_reset_skb(nskb, macsec->secy.netdev);
1314 ret = __netif_rx(nskb);
1315 if (ret == NET_RX_SUCCESS) {
1316 u64_stats_update_begin(&secy_stats->syncp);
1317 secy_stats->stats.InPktsUnknownSCI++;
1318 u64_stats_update_end(&secy_stats->syncp);
1320 macsec->secy.netdev->stats.rx_dropped++;
1326 return RX_HANDLER_PASS;
1329 static struct crypto_aead *macsec_alloc_tfm(char *key, int key_len, int icv_len)
1331 struct crypto_aead *tfm;
1334 /* Pick a sync gcm(aes) cipher to ensure order is preserved. */
1335 tfm = crypto_alloc_aead("gcm(aes)", 0, CRYPTO_ALG_ASYNC);
1340 ret = crypto_aead_setkey(tfm, key, key_len);
1344 ret = crypto_aead_setauthsize(tfm, icv_len);
1350 crypto_free_aead(tfm);
1351 return ERR_PTR(ret);
1354 static int init_rx_sa(struct macsec_rx_sa *rx_sa, char *sak, int key_len,
1357 rx_sa->stats = alloc_percpu(struct macsec_rx_sa_stats);
1361 rx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len);
1362 if (IS_ERR(rx_sa->key.tfm)) {
1363 free_percpu(rx_sa->stats);
1364 return PTR_ERR(rx_sa->key.tfm);
1367 rx_sa->ssci = MACSEC_UNDEF_SSCI;
1368 rx_sa->active = false;
1370 refcount_set(&rx_sa->refcnt, 1);
1371 spin_lock_init(&rx_sa->lock);
1376 static void clear_rx_sa(struct macsec_rx_sa *rx_sa)
1378 rx_sa->active = false;
1380 macsec_rxsa_put(rx_sa);
1383 static void free_rx_sc(struct macsec_rx_sc *rx_sc)
1387 for (i = 0; i < MACSEC_NUM_AN; i++) {
1388 struct macsec_rx_sa *sa = rtnl_dereference(rx_sc->sa[i]);
1390 RCU_INIT_POINTER(rx_sc->sa[i], NULL);
1395 macsec_rxsc_put(rx_sc);
1398 static struct macsec_rx_sc *del_rx_sc(struct macsec_secy *secy, sci_t sci)
1400 struct macsec_rx_sc *rx_sc, __rcu **rx_scp;
1402 for (rx_scp = &secy->rx_sc, rx_sc = rtnl_dereference(*rx_scp);
1404 rx_scp = &rx_sc->next, rx_sc = rtnl_dereference(*rx_scp)) {
1405 if (rx_sc->sci == sci) {
1408 rcu_assign_pointer(*rx_scp, rx_sc->next);
1416 static struct macsec_rx_sc *create_rx_sc(struct net_device *dev, sci_t sci,
1419 struct macsec_rx_sc *rx_sc;
1420 struct macsec_dev *macsec;
1421 struct net_device *real_dev = macsec_priv(dev)->real_dev;
1422 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
1423 struct macsec_secy *secy;
1425 list_for_each_entry(macsec, &rxd->secys, secys) {
1426 if (find_rx_sc_rtnl(&macsec->secy, sci))
1427 return ERR_PTR(-EEXIST);
1430 rx_sc = kzalloc(sizeof(*rx_sc), GFP_KERNEL);
1432 return ERR_PTR(-ENOMEM);
1434 rx_sc->stats = netdev_alloc_pcpu_stats(struct pcpu_rx_sc_stats);
1435 if (!rx_sc->stats) {
1437 return ERR_PTR(-ENOMEM);
1441 rx_sc->active = active;
1442 refcount_set(&rx_sc->refcnt, 1);
1444 secy = &macsec_priv(dev)->secy;
1445 rcu_assign_pointer(rx_sc->next, secy->rx_sc);
1446 rcu_assign_pointer(secy->rx_sc, rx_sc);
1454 static int init_tx_sa(struct macsec_tx_sa *tx_sa, char *sak, int key_len,
1457 tx_sa->stats = alloc_percpu(struct macsec_tx_sa_stats);
1461 tx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len);
1462 if (IS_ERR(tx_sa->key.tfm)) {
1463 free_percpu(tx_sa->stats);
1464 return PTR_ERR(tx_sa->key.tfm);
1467 tx_sa->ssci = MACSEC_UNDEF_SSCI;
1468 tx_sa->active = false;
1469 refcount_set(&tx_sa->refcnt, 1);
1470 spin_lock_init(&tx_sa->lock);
1475 static void clear_tx_sa(struct macsec_tx_sa *tx_sa)
1477 tx_sa->active = false;
1479 macsec_txsa_put(tx_sa);
1482 static struct genl_family macsec_fam;
1484 static struct net_device *get_dev_from_nl(struct net *net,
1485 struct nlattr **attrs)
1487 int ifindex = nla_get_u32(attrs[MACSEC_ATTR_IFINDEX]);
1488 struct net_device *dev;
1490 dev = __dev_get_by_index(net, ifindex);
1492 return ERR_PTR(-ENODEV);
1494 if (!netif_is_macsec(dev))
1495 return ERR_PTR(-ENODEV);
1500 static enum macsec_offload nla_get_offload(const struct nlattr *nla)
1502 return (__force enum macsec_offload)nla_get_u8(nla);
1505 static sci_t nla_get_sci(const struct nlattr *nla)
1507 return (__force sci_t)nla_get_u64(nla);
1510 static int nla_put_sci(struct sk_buff *skb, int attrtype, sci_t value,
1513 return nla_put_u64_64bit(skb, attrtype, (__force u64)value, padattr);
1516 static ssci_t nla_get_ssci(const struct nlattr *nla)
1518 return (__force ssci_t)nla_get_u32(nla);
1521 static int nla_put_ssci(struct sk_buff *skb, int attrtype, ssci_t value)
1523 return nla_put_u32(skb, attrtype, (__force u64)value);
1526 static struct macsec_tx_sa *get_txsa_from_nl(struct net *net,
1527 struct nlattr **attrs,
1528 struct nlattr **tb_sa,
1529 struct net_device **devp,
1530 struct macsec_secy **secyp,
1531 struct macsec_tx_sc **scp,
1534 struct net_device *dev;
1535 struct macsec_secy *secy;
1536 struct macsec_tx_sc *tx_sc;
1537 struct macsec_tx_sa *tx_sa;
1539 if (!tb_sa[MACSEC_SA_ATTR_AN])
1540 return ERR_PTR(-EINVAL);
1542 *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1544 dev = get_dev_from_nl(net, attrs);
1546 return ERR_CAST(dev);
1548 if (*assoc_num >= MACSEC_NUM_AN)
1549 return ERR_PTR(-EINVAL);
1551 secy = &macsec_priv(dev)->secy;
1552 tx_sc = &secy->tx_sc;
1554 tx_sa = rtnl_dereference(tx_sc->sa[*assoc_num]);
1556 return ERR_PTR(-ENODEV);
1564 static struct macsec_rx_sc *get_rxsc_from_nl(struct net *net,
1565 struct nlattr **attrs,
1566 struct nlattr **tb_rxsc,
1567 struct net_device **devp,
1568 struct macsec_secy **secyp)
1570 struct net_device *dev;
1571 struct macsec_secy *secy;
1572 struct macsec_rx_sc *rx_sc;
1575 dev = get_dev_from_nl(net, attrs);
1577 return ERR_CAST(dev);
1579 secy = &macsec_priv(dev)->secy;
1581 if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI])
1582 return ERR_PTR(-EINVAL);
1584 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1585 rx_sc = find_rx_sc_rtnl(secy, sci);
1587 return ERR_PTR(-ENODEV);
1595 static struct macsec_rx_sa *get_rxsa_from_nl(struct net *net,
1596 struct nlattr **attrs,
1597 struct nlattr **tb_rxsc,
1598 struct nlattr **tb_sa,
1599 struct net_device **devp,
1600 struct macsec_secy **secyp,
1601 struct macsec_rx_sc **scp,
1604 struct macsec_rx_sc *rx_sc;
1605 struct macsec_rx_sa *rx_sa;
1607 if (!tb_sa[MACSEC_SA_ATTR_AN])
1608 return ERR_PTR(-EINVAL);
1610 *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1611 if (*assoc_num >= MACSEC_NUM_AN)
1612 return ERR_PTR(-EINVAL);
1614 rx_sc = get_rxsc_from_nl(net, attrs, tb_rxsc, devp, secyp);
1616 return ERR_CAST(rx_sc);
1618 rx_sa = rtnl_dereference(rx_sc->sa[*assoc_num]);
1620 return ERR_PTR(-ENODEV);
1626 static const struct nla_policy macsec_genl_policy[NUM_MACSEC_ATTR] = {
1627 [MACSEC_ATTR_IFINDEX] = { .type = NLA_U32 },
1628 [MACSEC_ATTR_RXSC_CONFIG] = { .type = NLA_NESTED },
1629 [MACSEC_ATTR_SA_CONFIG] = { .type = NLA_NESTED },
1630 [MACSEC_ATTR_OFFLOAD] = { .type = NLA_NESTED },
1633 static const struct nla_policy macsec_genl_rxsc_policy[NUM_MACSEC_RXSC_ATTR] = {
1634 [MACSEC_RXSC_ATTR_SCI] = { .type = NLA_U64 },
1635 [MACSEC_RXSC_ATTR_ACTIVE] = { .type = NLA_U8 },
1638 static const struct nla_policy macsec_genl_sa_policy[NUM_MACSEC_SA_ATTR] = {
1639 [MACSEC_SA_ATTR_AN] = { .type = NLA_U8 },
1640 [MACSEC_SA_ATTR_ACTIVE] = { .type = NLA_U8 },
1641 [MACSEC_SA_ATTR_PN] = NLA_POLICY_MIN_LEN(4),
1642 [MACSEC_SA_ATTR_KEYID] = { .type = NLA_BINARY,
1643 .len = MACSEC_KEYID_LEN, },
1644 [MACSEC_SA_ATTR_KEY] = { .type = NLA_BINARY,
1645 .len = MACSEC_MAX_KEY_LEN, },
1646 [MACSEC_SA_ATTR_SSCI] = { .type = NLA_U32 },
1647 [MACSEC_SA_ATTR_SALT] = { .type = NLA_BINARY,
1648 .len = MACSEC_SALT_LEN, },
1651 static const struct nla_policy macsec_genl_offload_policy[NUM_MACSEC_OFFLOAD_ATTR] = {
1652 [MACSEC_OFFLOAD_ATTR_TYPE] = { .type = NLA_U8 },
1655 /* Offloads an operation to a device driver */
1656 static int macsec_offload(int (* const func)(struct macsec_context *),
1657 struct macsec_context *ctx)
1661 if (unlikely(!func))
1664 if (ctx->offload == MACSEC_OFFLOAD_PHY)
1665 mutex_lock(&ctx->phydev->lock);
1669 if (ctx->offload == MACSEC_OFFLOAD_PHY)
1670 mutex_unlock(&ctx->phydev->lock);
1675 static int parse_sa_config(struct nlattr **attrs, struct nlattr **tb_sa)
1677 if (!attrs[MACSEC_ATTR_SA_CONFIG])
1680 if (nla_parse_nested_deprecated(tb_sa, MACSEC_SA_ATTR_MAX, attrs[MACSEC_ATTR_SA_CONFIG], macsec_genl_sa_policy, NULL))
1686 static int parse_rxsc_config(struct nlattr **attrs, struct nlattr **tb_rxsc)
1688 if (!attrs[MACSEC_ATTR_RXSC_CONFIG])
1691 if (nla_parse_nested_deprecated(tb_rxsc, MACSEC_RXSC_ATTR_MAX, attrs[MACSEC_ATTR_RXSC_CONFIG], macsec_genl_rxsc_policy, NULL))
1697 static bool validate_add_rxsa(struct nlattr **attrs)
1699 if (!attrs[MACSEC_SA_ATTR_AN] ||
1700 !attrs[MACSEC_SA_ATTR_KEY] ||
1701 !attrs[MACSEC_SA_ATTR_KEYID])
1704 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
1707 if (attrs[MACSEC_SA_ATTR_PN] &&
1708 nla_get_u64(attrs[MACSEC_SA_ATTR_PN]) == 0)
1711 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
1712 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
1716 if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN)
1722 static int macsec_add_rxsa(struct sk_buff *skb, struct genl_info *info)
1724 struct net_device *dev;
1725 struct nlattr **attrs = info->attrs;
1726 struct macsec_secy *secy;
1727 struct macsec_rx_sc *rx_sc;
1728 struct macsec_rx_sa *rx_sa;
1729 unsigned char assoc_num;
1731 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1732 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1735 if (!attrs[MACSEC_ATTR_IFINDEX])
1738 if (parse_sa_config(attrs, tb_sa))
1741 if (parse_rxsc_config(attrs, tb_rxsc))
1744 if (!validate_add_rxsa(tb_sa))
1748 rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy);
1749 if (IS_ERR(rx_sc)) {
1751 return PTR_ERR(rx_sc);
1754 assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1756 if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) {
1757 pr_notice("macsec: nl: add_rxsa: bad key length: %d != %d\n",
1758 nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len);
1763 pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
1764 if (tb_sa[MACSEC_SA_ATTR_PN] &&
1765 nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
1766 pr_notice("macsec: nl: add_rxsa: bad pn length: %d != %d\n",
1767 nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
1773 if (!tb_sa[MACSEC_SA_ATTR_SSCI] || !tb_sa[MACSEC_SA_ATTR_SALT]) {
1778 if (nla_len(tb_sa[MACSEC_SA_ATTR_SALT]) != MACSEC_SALT_LEN) {
1779 pr_notice("macsec: nl: add_rxsa: bad salt length: %d != %d\n",
1780 nla_len(tb_sa[MACSEC_SA_ATTR_SALT]),
1787 rx_sa = rtnl_dereference(rx_sc->sa[assoc_num]);
1793 rx_sa = kmalloc(sizeof(*rx_sa), GFP_KERNEL);
1799 err = init_rx_sa(rx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
1800 secy->key_len, secy->icv_len);
1807 if (tb_sa[MACSEC_SA_ATTR_PN]) {
1808 spin_lock_bh(&rx_sa->lock);
1809 rx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
1810 spin_unlock_bh(&rx_sa->lock);
1813 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
1814 rx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
1819 rx_sa->ssci = nla_get_ssci(tb_sa[MACSEC_SA_ATTR_SSCI]);
1820 nla_memcpy(rx_sa->key.salt.bytes, tb_sa[MACSEC_SA_ATTR_SALT],
1824 /* If h/w offloading is available, propagate to the device */
1825 if (macsec_is_offloaded(netdev_priv(dev))) {
1826 const struct macsec_ops *ops;
1827 struct macsec_context ctx;
1829 ops = macsec_get_ops(netdev_priv(dev), &ctx);
1835 ctx.sa.assoc_num = assoc_num;
1836 ctx.sa.rx_sa = rx_sa;
1838 memcpy(ctx.sa.key, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
1841 err = macsec_offload(ops->mdo_add_rxsa, &ctx);
1842 memzero_explicit(ctx.sa.key, secy->key_len);
1847 nla_memcpy(rx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN);
1848 rcu_assign_pointer(rx_sc->sa[assoc_num], rx_sa);
1855 macsec_rxsa_put(rx_sa);
1860 static bool validate_add_rxsc(struct nlattr **attrs)
1862 if (!attrs[MACSEC_RXSC_ATTR_SCI])
1865 if (attrs[MACSEC_RXSC_ATTR_ACTIVE]) {
1866 if (nla_get_u8(attrs[MACSEC_RXSC_ATTR_ACTIVE]) > 1)
1873 static int macsec_add_rxsc(struct sk_buff *skb, struct genl_info *info)
1875 struct net_device *dev;
1876 sci_t sci = MACSEC_UNDEF_SCI;
1877 struct nlattr **attrs = info->attrs;
1878 struct macsec_rx_sc *rx_sc;
1879 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1880 struct macsec_secy *secy;
1884 if (!attrs[MACSEC_ATTR_IFINDEX])
1887 if (parse_rxsc_config(attrs, tb_rxsc))
1890 if (!validate_add_rxsc(tb_rxsc))
1894 dev = get_dev_from_nl(genl_info_net(info), attrs);
1897 return PTR_ERR(dev);
1900 secy = &macsec_priv(dev)->secy;
1901 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1903 if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE])
1904 active = nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]);
1906 rx_sc = create_rx_sc(dev, sci, active);
1907 if (IS_ERR(rx_sc)) {
1909 return PTR_ERR(rx_sc);
1912 if (macsec_is_offloaded(netdev_priv(dev))) {
1913 const struct macsec_ops *ops;
1914 struct macsec_context ctx;
1916 ops = macsec_get_ops(netdev_priv(dev), &ctx);
1925 ret = macsec_offload(ops->mdo_add_rxsc, &ctx);
1935 del_rx_sc(secy, sci);
1941 static bool validate_add_txsa(struct nlattr **attrs)
1943 if (!attrs[MACSEC_SA_ATTR_AN] ||
1944 !attrs[MACSEC_SA_ATTR_PN] ||
1945 !attrs[MACSEC_SA_ATTR_KEY] ||
1946 !attrs[MACSEC_SA_ATTR_KEYID])
1949 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
1952 if (nla_get_u64(attrs[MACSEC_SA_ATTR_PN]) == 0)
1955 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
1956 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
1960 if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN)
1966 static int macsec_add_txsa(struct sk_buff *skb, struct genl_info *info)
1968 struct net_device *dev;
1969 struct nlattr **attrs = info->attrs;
1970 struct macsec_secy *secy;
1971 struct macsec_tx_sc *tx_sc;
1972 struct macsec_tx_sa *tx_sa;
1973 unsigned char assoc_num;
1975 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1976 bool was_operational;
1979 if (!attrs[MACSEC_ATTR_IFINDEX])
1982 if (parse_sa_config(attrs, tb_sa))
1985 if (!validate_add_txsa(tb_sa))
1989 dev = get_dev_from_nl(genl_info_net(info), attrs);
1992 return PTR_ERR(dev);
1995 secy = &macsec_priv(dev)->secy;
1996 tx_sc = &secy->tx_sc;
1998 assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
2000 if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) {
2001 pr_notice("macsec: nl: add_txsa: bad key length: %d != %d\n",
2002 nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len);
2007 pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
2008 if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
2009 pr_notice("macsec: nl: add_txsa: bad pn length: %d != %d\n",
2010 nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
2016 if (!tb_sa[MACSEC_SA_ATTR_SSCI] || !tb_sa[MACSEC_SA_ATTR_SALT]) {
2021 if (nla_len(tb_sa[MACSEC_SA_ATTR_SALT]) != MACSEC_SALT_LEN) {
2022 pr_notice("macsec: nl: add_txsa: bad salt length: %d != %d\n",
2023 nla_len(tb_sa[MACSEC_SA_ATTR_SALT]),
2030 tx_sa = rtnl_dereference(tx_sc->sa[assoc_num]);
2036 tx_sa = kmalloc(sizeof(*tx_sa), GFP_KERNEL);
2042 err = init_tx_sa(tx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
2043 secy->key_len, secy->icv_len);
2050 spin_lock_bh(&tx_sa->lock);
2051 tx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
2052 spin_unlock_bh(&tx_sa->lock);
2054 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2055 tx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2057 was_operational = secy->operational;
2058 if (assoc_num == tx_sc->encoding_sa && tx_sa->active)
2059 secy->operational = true;
2062 tx_sa->ssci = nla_get_ssci(tb_sa[MACSEC_SA_ATTR_SSCI]);
2063 nla_memcpy(tx_sa->key.salt.bytes, tb_sa[MACSEC_SA_ATTR_SALT],
2067 /* If h/w offloading is available, propagate to the device */
2068 if (macsec_is_offloaded(netdev_priv(dev))) {
2069 const struct macsec_ops *ops;
2070 struct macsec_context ctx;
2072 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2078 ctx.sa.assoc_num = assoc_num;
2079 ctx.sa.tx_sa = tx_sa;
2081 memcpy(ctx.sa.key, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
2084 err = macsec_offload(ops->mdo_add_txsa, &ctx);
2085 memzero_explicit(ctx.sa.key, secy->key_len);
2090 nla_memcpy(tx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN);
2091 rcu_assign_pointer(tx_sc->sa[assoc_num], tx_sa);
2098 secy->operational = was_operational;
2099 macsec_txsa_put(tx_sa);
2104 static int macsec_del_rxsa(struct sk_buff *skb, struct genl_info *info)
2106 struct nlattr **attrs = info->attrs;
2107 struct net_device *dev;
2108 struct macsec_secy *secy;
2109 struct macsec_rx_sc *rx_sc;
2110 struct macsec_rx_sa *rx_sa;
2112 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2113 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2116 if (!attrs[MACSEC_ATTR_IFINDEX])
2119 if (parse_sa_config(attrs, tb_sa))
2122 if (parse_rxsc_config(attrs, tb_rxsc))
2126 rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa,
2127 &dev, &secy, &rx_sc, &assoc_num);
2128 if (IS_ERR(rx_sa)) {
2130 return PTR_ERR(rx_sa);
2133 if (rx_sa->active) {
2138 /* If h/w offloading is available, propagate to the device */
2139 if (macsec_is_offloaded(netdev_priv(dev))) {
2140 const struct macsec_ops *ops;
2141 struct macsec_context ctx;
2143 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2149 ctx.sa.assoc_num = assoc_num;
2150 ctx.sa.rx_sa = rx_sa;
2153 ret = macsec_offload(ops->mdo_del_rxsa, &ctx);
2158 RCU_INIT_POINTER(rx_sc->sa[assoc_num], NULL);
2170 static int macsec_del_rxsc(struct sk_buff *skb, struct genl_info *info)
2172 struct nlattr **attrs = info->attrs;
2173 struct net_device *dev;
2174 struct macsec_secy *secy;
2175 struct macsec_rx_sc *rx_sc;
2177 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2180 if (!attrs[MACSEC_ATTR_IFINDEX])
2183 if (parse_rxsc_config(attrs, tb_rxsc))
2186 if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI])
2190 dev = get_dev_from_nl(genl_info_net(info), info->attrs);
2193 return PTR_ERR(dev);
2196 secy = &macsec_priv(dev)->secy;
2197 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
2199 rx_sc = del_rx_sc(secy, sci);
2205 /* If h/w offloading is available, propagate to the device */
2206 if (macsec_is_offloaded(netdev_priv(dev))) {
2207 const struct macsec_ops *ops;
2208 struct macsec_context ctx;
2210 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2218 ret = macsec_offload(ops->mdo_del_rxsc, &ctx);
2233 static int macsec_del_txsa(struct sk_buff *skb, struct genl_info *info)
2235 struct nlattr **attrs = info->attrs;
2236 struct net_device *dev;
2237 struct macsec_secy *secy;
2238 struct macsec_tx_sc *tx_sc;
2239 struct macsec_tx_sa *tx_sa;
2241 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2244 if (!attrs[MACSEC_ATTR_IFINDEX])
2247 if (parse_sa_config(attrs, tb_sa))
2251 tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa,
2252 &dev, &secy, &tx_sc, &assoc_num);
2253 if (IS_ERR(tx_sa)) {
2255 return PTR_ERR(tx_sa);
2258 if (tx_sa->active) {
2263 /* If h/w offloading is available, propagate to the device */
2264 if (macsec_is_offloaded(netdev_priv(dev))) {
2265 const struct macsec_ops *ops;
2266 struct macsec_context ctx;
2268 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2274 ctx.sa.assoc_num = assoc_num;
2275 ctx.sa.tx_sa = tx_sa;
2278 ret = macsec_offload(ops->mdo_del_txsa, &ctx);
2283 RCU_INIT_POINTER(tx_sc->sa[assoc_num], NULL);
2295 static bool validate_upd_sa(struct nlattr **attrs)
2297 if (!attrs[MACSEC_SA_ATTR_AN] ||
2298 attrs[MACSEC_SA_ATTR_KEY] ||
2299 attrs[MACSEC_SA_ATTR_KEYID] ||
2300 attrs[MACSEC_SA_ATTR_SSCI] ||
2301 attrs[MACSEC_SA_ATTR_SALT])
2304 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
2307 if (attrs[MACSEC_SA_ATTR_PN] && nla_get_u64(attrs[MACSEC_SA_ATTR_PN]) == 0)
2310 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
2311 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
2318 static int macsec_upd_txsa(struct sk_buff *skb, struct genl_info *info)
2320 struct nlattr **attrs = info->attrs;
2321 struct net_device *dev;
2322 struct macsec_secy *secy;
2323 struct macsec_tx_sc *tx_sc;
2324 struct macsec_tx_sa *tx_sa;
2326 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2327 bool was_operational, was_active;
2333 if (!attrs[MACSEC_ATTR_IFINDEX])
2336 if (parse_sa_config(attrs, tb_sa))
2339 if (!validate_upd_sa(tb_sa))
2343 tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa,
2344 &dev, &secy, &tx_sc, &assoc_num);
2345 if (IS_ERR(tx_sa)) {
2347 return PTR_ERR(tx_sa);
2350 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2353 pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
2354 if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
2355 pr_notice("macsec: nl: upd_txsa: bad pn length: %d != %d\n",
2356 nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
2361 spin_lock_bh(&tx_sa->lock);
2362 prev_pn = tx_sa->next_pn_halves;
2363 tx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
2364 spin_unlock_bh(&tx_sa->lock);
2367 was_active = tx_sa->active;
2368 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2369 tx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2371 was_operational = secy->operational;
2372 if (assoc_num == tx_sc->encoding_sa)
2373 secy->operational = tx_sa->active;
2375 /* If h/w offloading is available, propagate to the device */
2376 if (macsec_is_offloaded(netdev_priv(dev))) {
2377 const struct macsec_ops *ops;
2378 struct macsec_context ctx;
2380 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2386 ctx.sa.assoc_num = assoc_num;
2387 ctx.sa.tx_sa = tx_sa;
2390 ret = macsec_offload(ops->mdo_upd_txsa, &ctx);
2400 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2401 spin_lock_bh(&tx_sa->lock);
2402 tx_sa->next_pn_halves = prev_pn;
2403 spin_unlock_bh(&tx_sa->lock);
2405 tx_sa->active = was_active;
2406 secy->operational = was_operational;
2411 static int macsec_upd_rxsa(struct sk_buff *skb, struct genl_info *info)
2413 struct nlattr **attrs = info->attrs;
2414 struct net_device *dev;
2415 struct macsec_secy *secy;
2416 struct macsec_rx_sc *rx_sc;
2417 struct macsec_rx_sa *rx_sa;
2419 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2420 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2427 if (!attrs[MACSEC_ATTR_IFINDEX])
2430 if (parse_rxsc_config(attrs, tb_rxsc))
2433 if (parse_sa_config(attrs, tb_sa))
2436 if (!validate_upd_sa(tb_sa))
2440 rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa,
2441 &dev, &secy, &rx_sc, &assoc_num);
2442 if (IS_ERR(rx_sa)) {
2444 return PTR_ERR(rx_sa);
2447 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2450 pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
2451 if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
2452 pr_notice("macsec: nl: upd_rxsa: bad pn length: %d != %d\n",
2453 nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
2458 spin_lock_bh(&rx_sa->lock);
2459 prev_pn = rx_sa->next_pn_halves;
2460 rx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
2461 spin_unlock_bh(&rx_sa->lock);
2464 was_active = rx_sa->active;
2465 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2466 rx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2468 /* If h/w offloading is available, propagate to the device */
2469 if (macsec_is_offloaded(netdev_priv(dev))) {
2470 const struct macsec_ops *ops;
2471 struct macsec_context ctx;
2473 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2479 ctx.sa.assoc_num = assoc_num;
2480 ctx.sa.rx_sa = rx_sa;
2483 ret = macsec_offload(ops->mdo_upd_rxsa, &ctx);
2492 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2493 spin_lock_bh(&rx_sa->lock);
2494 rx_sa->next_pn_halves = prev_pn;
2495 spin_unlock_bh(&rx_sa->lock);
2497 rx_sa->active = was_active;
2502 static int macsec_upd_rxsc(struct sk_buff *skb, struct genl_info *info)
2504 struct nlattr **attrs = info->attrs;
2505 struct net_device *dev;
2506 struct macsec_secy *secy;
2507 struct macsec_rx_sc *rx_sc;
2508 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2509 unsigned int prev_n_rx_sc;
2513 if (!attrs[MACSEC_ATTR_IFINDEX])
2516 if (parse_rxsc_config(attrs, tb_rxsc))
2519 if (!validate_add_rxsc(tb_rxsc))
2523 rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy);
2524 if (IS_ERR(rx_sc)) {
2526 return PTR_ERR(rx_sc);
2529 was_active = rx_sc->active;
2530 prev_n_rx_sc = secy->n_rx_sc;
2531 if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]) {
2532 bool new = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]);
2534 if (rx_sc->active != new)
2535 secy->n_rx_sc += new ? 1 : -1;
2537 rx_sc->active = new;
2540 /* If h/w offloading is available, propagate to the device */
2541 if (macsec_is_offloaded(netdev_priv(dev))) {
2542 const struct macsec_ops *ops;
2543 struct macsec_context ctx;
2545 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2554 ret = macsec_offload(ops->mdo_upd_rxsc, &ctx);
2564 secy->n_rx_sc = prev_n_rx_sc;
2565 rx_sc->active = was_active;
2570 static bool macsec_is_configured(struct macsec_dev *macsec)
2572 struct macsec_secy *secy = &macsec->secy;
2573 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
2579 for (i = 0; i < MACSEC_NUM_AN; i++)
2586 static int macsec_upd_offload(struct sk_buff *skb, struct genl_info *info)
2588 struct nlattr *tb_offload[MACSEC_OFFLOAD_ATTR_MAX + 1];
2589 enum macsec_offload offload, prev_offload;
2590 int (*func)(struct macsec_context *ctx);
2591 struct nlattr **attrs = info->attrs;
2592 struct net_device *dev;
2593 const struct macsec_ops *ops;
2594 struct macsec_context ctx;
2595 struct macsec_dev *macsec;
2598 if (!attrs[MACSEC_ATTR_IFINDEX])
2601 if (!attrs[MACSEC_ATTR_OFFLOAD])
2604 if (nla_parse_nested_deprecated(tb_offload, MACSEC_OFFLOAD_ATTR_MAX,
2605 attrs[MACSEC_ATTR_OFFLOAD],
2606 macsec_genl_offload_policy, NULL))
2609 dev = get_dev_from_nl(genl_info_net(info), attrs);
2611 return PTR_ERR(dev);
2612 macsec = macsec_priv(dev);
2614 if (!tb_offload[MACSEC_OFFLOAD_ATTR_TYPE])
2617 offload = nla_get_u8(tb_offload[MACSEC_OFFLOAD_ATTR_TYPE]);
2618 if (macsec->offload == offload)
2621 /* Check if the offloading mode is supported by the underlying layers */
2622 if (offload != MACSEC_OFFLOAD_OFF &&
2623 !macsec_check_offload(offload, macsec))
2626 /* Check if the net device is busy. */
2627 if (netif_running(dev))
2632 prev_offload = macsec->offload;
2633 macsec->offload = offload;
2635 /* Check if the device already has rules configured: we do not support
2638 if (macsec_is_configured(macsec)) {
2643 ops = __macsec_get_ops(offload == MACSEC_OFFLOAD_OFF ? prev_offload : offload,
2650 if (prev_offload == MACSEC_OFFLOAD_OFF)
2651 func = ops->mdo_add_secy;
2653 func = ops->mdo_del_secy;
2655 ctx.secy = &macsec->secy;
2656 ret = macsec_offload(func, &ctx);
2664 macsec->offload = prev_offload;
2670 static void get_tx_sa_stats(struct net_device *dev, int an,
2671 struct macsec_tx_sa *tx_sa,
2672 struct macsec_tx_sa_stats *sum)
2674 struct macsec_dev *macsec = macsec_priv(dev);
2677 /* If h/w offloading is available, propagate to the device */
2678 if (macsec_is_offloaded(macsec)) {
2679 const struct macsec_ops *ops;
2680 struct macsec_context ctx;
2682 ops = macsec_get_ops(macsec, &ctx);
2684 ctx.sa.assoc_num = an;
2685 ctx.sa.tx_sa = tx_sa;
2686 ctx.stats.tx_sa_stats = sum;
2687 ctx.secy = &macsec_priv(dev)->secy;
2688 macsec_offload(ops->mdo_get_tx_sa_stats, &ctx);
2693 for_each_possible_cpu(cpu) {
2694 const struct macsec_tx_sa_stats *stats =
2695 per_cpu_ptr(tx_sa->stats, cpu);
2697 sum->OutPktsProtected += stats->OutPktsProtected;
2698 sum->OutPktsEncrypted += stats->OutPktsEncrypted;
2702 static int copy_tx_sa_stats(struct sk_buff *skb, struct macsec_tx_sa_stats *sum)
2704 if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_PROTECTED,
2705 sum->OutPktsProtected) ||
2706 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_ENCRYPTED,
2707 sum->OutPktsEncrypted))
2713 static void get_rx_sa_stats(struct net_device *dev,
2714 struct macsec_rx_sc *rx_sc, int an,
2715 struct macsec_rx_sa *rx_sa,
2716 struct macsec_rx_sa_stats *sum)
2718 struct macsec_dev *macsec = macsec_priv(dev);
2721 /* If h/w offloading is available, propagate to the device */
2722 if (macsec_is_offloaded(macsec)) {
2723 const struct macsec_ops *ops;
2724 struct macsec_context ctx;
2726 ops = macsec_get_ops(macsec, &ctx);
2728 ctx.sa.assoc_num = an;
2729 ctx.sa.rx_sa = rx_sa;
2730 ctx.stats.rx_sa_stats = sum;
2731 ctx.secy = &macsec_priv(dev)->secy;
2733 macsec_offload(ops->mdo_get_rx_sa_stats, &ctx);
2738 for_each_possible_cpu(cpu) {
2739 const struct macsec_rx_sa_stats *stats =
2740 per_cpu_ptr(rx_sa->stats, cpu);
2742 sum->InPktsOK += stats->InPktsOK;
2743 sum->InPktsInvalid += stats->InPktsInvalid;
2744 sum->InPktsNotValid += stats->InPktsNotValid;
2745 sum->InPktsNotUsingSA += stats->InPktsNotUsingSA;
2746 sum->InPktsUnusedSA += stats->InPktsUnusedSA;
2750 static int copy_rx_sa_stats(struct sk_buff *skb,
2751 struct macsec_rx_sa_stats *sum)
2753 if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_OK, sum->InPktsOK) ||
2754 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_INVALID,
2755 sum->InPktsInvalid) ||
2756 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_VALID,
2757 sum->InPktsNotValid) ||
2758 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_USING_SA,
2759 sum->InPktsNotUsingSA) ||
2760 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_UNUSED_SA,
2761 sum->InPktsUnusedSA))
2767 static void get_rx_sc_stats(struct net_device *dev,
2768 struct macsec_rx_sc *rx_sc,
2769 struct macsec_rx_sc_stats *sum)
2771 struct macsec_dev *macsec = macsec_priv(dev);
2774 /* If h/w offloading is available, propagate to the device */
2775 if (macsec_is_offloaded(macsec)) {
2776 const struct macsec_ops *ops;
2777 struct macsec_context ctx;
2779 ops = macsec_get_ops(macsec, &ctx);
2781 ctx.stats.rx_sc_stats = sum;
2782 ctx.secy = &macsec_priv(dev)->secy;
2784 macsec_offload(ops->mdo_get_rx_sc_stats, &ctx);
2789 for_each_possible_cpu(cpu) {
2790 const struct pcpu_rx_sc_stats *stats;
2791 struct macsec_rx_sc_stats tmp;
2794 stats = per_cpu_ptr(rx_sc->stats, cpu);
2796 start = u64_stats_fetch_begin_irq(&stats->syncp);
2797 memcpy(&tmp, &stats->stats, sizeof(tmp));
2798 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2800 sum->InOctetsValidated += tmp.InOctetsValidated;
2801 sum->InOctetsDecrypted += tmp.InOctetsDecrypted;
2802 sum->InPktsUnchecked += tmp.InPktsUnchecked;
2803 sum->InPktsDelayed += tmp.InPktsDelayed;
2804 sum->InPktsOK += tmp.InPktsOK;
2805 sum->InPktsInvalid += tmp.InPktsInvalid;
2806 sum->InPktsLate += tmp.InPktsLate;
2807 sum->InPktsNotValid += tmp.InPktsNotValid;
2808 sum->InPktsNotUsingSA += tmp.InPktsNotUsingSA;
2809 sum->InPktsUnusedSA += tmp.InPktsUnusedSA;
2813 static int copy_rx_sc_stats(struct sk_buff *skb, struct macsec_rx_sc_stats *sum)
2815 if (nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_VALIDATED,
2816 sum->InOctetsValidated,
2817 MACSEC_RXSC_STATS_ATTR_PAD) ||
2818 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_DECRYPTED,
2819 sum->InOctetsDecrypted,
2820 MACSEC_RXSC_STATS_ATTR_PAD) ||
2821 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNCHECKED,
2822 sum->InPktsUnchecked,
2823 MACSEC_RXSC_STATS_ATTR_PAD) ||
2824 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_DELAYED,
2826 MACSEC_RXSC_STATS_ATTR_PAD) ||
2827 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_OK,
2829 MACSEC_RXSC_STATS_ATTR_PAD) ||
2830 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_INVALID,
2832 MACSEC_RXSC_STATS_ATTR_PAD) ||
2833 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_LATE,
2835 MACSEC_RXSC_STATS_ATTR_PAD) ||
2836 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_VALID,
2837 sum->InPktsNotValid,
2838 MACSEC_RXSC_STATS_ATTR_PAD) ||
2839 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_USING_SA,
2840 sum->InPktsNotUsingSA,
2841 MACSEC_RXSC_STATS_ATTR_PAD) ||
2842 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNUSED_SA,
2843 sum->InPktsUnusedSA,
2844 MACSEC_RXSC_STATS_ATTR_PAD))
2850 static void get_tx_sc_stats(struct net_device *dev,
2851 struct macsec_tx_sc_stats *sum)
2853 struct macsec_dev *macsec = macsec_priv(dev);
2856 /* If h/w offloading is available, propagate to the device */
2857 if (macsec_is_offloaded(macsec)) {
2858 const struct macsec_ops *ops;
2859 struct macsec_context ctx;
2861 ops = macsec_get_ops(macsec, &ctx);
2863 ctx.stats.tx_sc_stats = sum;
2864 ctx.secy = &macsec_priv(dev)->secy;
2865 macsec_offload(ops->mdo_get_tx_sc_stats, &ctx);
2870 for_each_possible_cpu(cpu) {
2871 const struct pcpu_tx_sc_stats *stats;
2872 struct macsec_tx_sc_stats tmp;
2875 stats = per_cpu_ptr(macsec_priv(dev)->secy.tx_sc.stats, cpu);
2877 start = u64_stats_fetch_begin_irq(&stats->syncp);
2878 memcpy(&tmp, &stats->stats, sizeof(tmp));
2879 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2881 sum->OutPktsProtected += tmp.OutPktsProtected;
2882 sum->OutPktsEncrypted += tmp.OutPktsEncrypted;
2883 sum->OutOctetsProtected += tmp.OutOctetsProtected;
2884 sum->OutOctetsEncrypted += tmp.OutOctetsEncrypted;
2888 static int copy_tx_sc_stats(struct sk_buff *skb, struct macsec_tx_sc_stats *sum)
2890 if (nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_PROTECTED,
2891 sum->OutPktsProtected,
2892 MACSEC_TXSC_STATS_ATTR_PAD) ||
2893 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_ENCRYPTED,
2894 sum->OutPktsEncrypted,
2895 MACSEC_TXSC_STATS_ATTR_PAD) ||
2896 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_PROTECTED,
2897 sum->OutOctetsProtected,
2898 MACSEC_TXSC_STATS_ATTR_PAD) ||
2899 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_ENCRYPTED,
2900 sum->OutOctetsEncrypted,
2901 MACSEC_TXSC_STATS_ATTR_PAD))
2907 static void get_secy_stats(struct net_device *dev, struct macsec_dev_stats *sum)
2909 struct macsec_dev *macsec = macsec_priv(dev);
2912 /* If h/w offloading is available, propagate to the device */
2913 if (macsec_is_offloaded(macsec)) {
2914 const struct macsec_ops *ops;
2915 struct macsec_context ctx;
2917 ops = macsec_get_ops(macsec, &ctx);
2919 ctx.stats.dev_stats = sum;
2920 ctx.secy = &macsec_priv(dev)->secy;
2921 macsec_offload(ops->mdo_get_dev_stats, &ctx);
2926 for_each_possible_cpu(cpu) {
2927 const struct pcpu_secy_stats *stats;
2928 struct macsec_dev_stats tmp;
2931 stats = per_cpu_ptr(macsec_priv(dev)->stats, cpu);
2933 start = u64_stats_fetch_begin_irq(&stats->syncp);
2934 memcpy(&tmp, &stats->stats, sizeof(tmp));
2935 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2937 sum->OutPktsUntagged += tmp.OutPktsUntagged;
2938 sum->InPktsUntagged += tmp.InPktsUntagged;
2939 sum->OutPktsTooLong += tmp.OutPktsTooLong;
2940 sum->InPktsNoTag += tmp.InPktsNoTag;
2941 sum->InPktsBadTag += tmp.InPktsBadTag;
2942 sum->InPktsUnknownSCI += tmp.InPktsUnknownSCI;
2943 sum->InPktsNoSCI += tmp.InPktsNoSCI;
2944 sum->InPktsOverrun += tmp.InPktsOverrun;
2948 static int copy_secy_stats(struct sk_buff *skb, struct macsec_dev_stats *sum)
2950 if (nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_UNTAGGED,
2951 sum->OutPktsUntagged,
2952 MACSEC_SECY_STATS_ATTR_PAD) ||
2953 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNTAGGED,
2954 sum->InPktsUntagged,
2955 MACSEC_SECY_STATS_ATTR_PAD) ||
2956 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_TOO_LONG,
2957 sum->OutPktsTooLong,
2958 MACSEC_SECY_STATS_ATTR_PAD) ||
2959 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_TAG,
2961 MACSEC_SECY_STATS_ATTR_PAD) ||
2962 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_BAD_TAG,
2964 MACSEC_SECY_STATS_ATTR_PAD) ||
2965 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNKNOWN_SCI,
2966 sum->InPktsUnknownSCI,
2967 MACSEC_SECY_STATS_ATTR_PAD) ||
2968 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_SCI,
2970 MACSEC_SECY_STATS_ATTR_PAD) ||
2971 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_OVERRUN,
2973 MACSEC_SECY_STATS_ATTR_PAD))
2979 static int nla_put_secy(struct macsec_secy *secy, struct sk_buff *skb)
2981 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
2982 struct nlattr *secy_nest = nla_nest_start_noflag(skb,
2989 switch (secy->key_len) {
2990 case MACSEC_GCM_AES_128_SAK_LEN:
2991 csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_128 : MACSEC_DEFAULT_CIPHER_ID;
2993 case MACSEC_GCM_AES_256_SAK_LEN:
2994 csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_256 : MACSEC_CIPHER_ID_GCM_AES_256;
3000 if (nla_put_sci(skb, MACSEC_SECY_ATTR_SCI, secy->sci,
3001 MACSEC_SECY_ATTR_PAD) ||
3002 nla_put_u64_64bit(skb, MACSEC_SECY_ATTR_CIPHER_SUITE,
3003 csid, MACSEC_SECY_ATTR_PAD) ||
3004 nla_put_u8(skb, MACSEC_SECY_ATTR_ICV_LEN, secy->icv_len) ||
3005 nla_put_u8(skb, MACSEC_SECY_ATTR_OPER, secy->operational) ||
3006 nla_put_u8(skb, MACSEC_SECY_ATTR_PROTECT, secy->protect_frames) ||
3007 nla_put_u8(skb, MACSEC_SECY_ATTR_REPLAY, secy->replay_protect) ||
3008 nla_put_u8(skb, MACSEC_SECY_ATTR_VALIDATE, secy->validate_frames) ||
3009 nla_put_u8(skb, MACSEC_SECY_ATTR_ENCRYPT, tx_sc->encrypt) ||
3010 nla_put_u8(skb, MACSEC_SECY_ATTR_INC_SCI, tx_sc->send_sci) ||
3011 nla_put_u8(skb, MACSEC_SECY_ATTR_ES, tx_sc->end_station) ||
3012 nla_put_u8(skb, MACSEC_SECY_ATTR_SCB, tx_sc->scb) ||
3013 nla_put_u8(skb, MACSEC_SECY_ATTR_ENCODING_SA, tx_sc->encoding_sa))
3016 if (secy->replay_protect) {
3017 if (nla_put_u32(skb, MACSEC_SECY_ATTR_WINDOW, secy->replay_window))
3021 nla_nest_end(skb, secy_nest);
3025 nla_nest_cancel(skb, secy_nest);
3029 static noinline_for_stack int
3030 dump_secy(struct macsec_secy *secy, struct net_device *dev,
3031 struct sk_buff *skb, struct netlink_callback *cb)
3033 struct macsec_tx_sc_stats tx_sc_stats = {0, };
3034 struct macsec_tx_sa_stats tx_sa_stats = {0, };
3035 struct macsec_rx_sc_stats rx_sc_stats = {0, };
3036 struct macsec_rx_sa_stats rx_sa_stats = {0, };
3037 struct macsec_dev *macsec = netdev_priv(dev);
3038 struct macsec_dev_stats dev_stats = {0, };
3039 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
3040 struct nlattr *txsa_list, *rxsc_list;
3041 struct macsec_rx_sc *rx_sc;
3042 struct nlattr *attr;
3046 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
3047 &macsec_fam, NLM_F_MULTI, MACSEC_CMD_GET_TXSC);
3051 genl_dump_check_consistent(cb, hdr);
3053 if (nla_put_u32(skb, MACSEC_ATTR_IFINDEX, dev->ifindex))
3054 goto nla_put_failure;
3056 attr = nla_nest_start_noflag(skb, MACSEC_ATTR_OFFLOAD);
3058 goto nla_put_failure;
3059 if (nla_put_u8(skb, MACSEC_OFFLOAD_ATTR_TYPE, macsec->offload))
3060 goto nla_put_failure;
3061 nla_nest_end(skb, attr);
3063 if (nla_put_secy(secy, skb))
3064 goto nla_put_failure;
3066 attr = nla_nest_start_noflag(skb, MACSEC_ATTR_TXSC_STATS);
3068 goto nla_put_failure;
3070 get_tx_sc_stats(dev, &tx_sc_stats);
3071 if (copy_tx_sc_stats(skb, &tx_sc_stats)) {
3072 nla_nest_cancel(skb, attr);
3073 goto nla_put_failure;
3075 nla_nest_end(skb, attr);
3077 attr = nla_nest_start_noflag(skb, MACSEC_ATTR_SECY_STATS);
3079 goto nla_put_failure;
3080 get_secy_stats(dev, &dev_stats);
3081 if (copy_secy_stats(skb, &dev_stats)) {
3082 nla_nest_cancel(skb, attr);
3083 goto nla_put_failure;
3085 nla_nest_end(skb, attr);
3087 txsa_list = nla_nest_start_noflag(skb, MACSEC_ATTR_TXSA_LIST);
3089 goto nla_put_failure;
3090 for (i = 0, j = 1; i < MACSEC_NUM_AN; i++) {
3091 struct macsec_tx_sa *tx_sa = rtnl_dereference(tx_sc->sa[i]);
3092 struct nlattr *txsa_nest;
3099 txsa_nest = nla_nest_start_noflag(skb, j++);
3101 nla_nest_cancel(skb, txsa_list);
3102 goto nla_put_failure;
3105 attr = nla_nest_start_noflag(skb, MACSEC_SA_ATTR_STATS);
3107 nla_nest_cancel(skb, txsa_nest);
3108 nla_nest_cancel(skb, txsa_list);
3109 goto nla_put_failure;
3111 memset(&tx_sa_stats, 0, sizeof(tx_sa_stats));
3112 get_tx_sa_stats(dev, i, tx_sa, &tx_sa_stats);
3113 if (copy_tx_sa_stats(skb, &tx_sa_stats)) {
3114 nla_nest_cancel(skb, attr);
3115 nla_nest_cancel(skb, txsa_nest);
3116 nla_nest_cancel(skb, txsa_list);
3117 goto nla_put_failure;
3119 nla_nest_end(skb, attr);
3122 pn = tx_sa->next_pn;
3123 pn_len = MACSEC_XPN_PN_LEN;
3125 pn = tx_sa->next_pn_halves.lower;
3126 pn_len = MACSEC_DEFAULT_PN_LEN;
3129 if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) ||
3130 nla_put(skb, MACSEC_SA_ATTR_PN, pn_len, &pn) ||
3131 nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, tx_sa->key.id) ||
3132 (secy->xpn && nla_put_ssci(skb, MACSEC_SA_ATTR_SSCI, tx_sa->ssci)) ||
3133 nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, tx_sa->active)) {
3134 nla_nest_cancel(skb, txsa_nest);
3135 nla_nest_cancel(skb, txsa_list);
3136 goto nla_put_failure;
3139 nla_nest_end(skb, txsa_nest);
3141 nla_nest_end(skb, txsa_list);
3143 rxsc_list = nla_nest_start_noflag(skb, MACSEC_ATTR_RXSC_LIST);
3145 goto nla_put_failure;
3148 for_each_rxsc_rtnl(secy, rx_sc) {
3150 struct nlattr *rxsa_list;
3151 struct nlattr *rxsc_nest = nla_nest_start_noflag(skb, j++);
3154 nla_nest_cancel(skb, rxsc_list);
3155 goto nla_put_failure;
3158 if (nla_put_u8(skb, MACSEC_RXSC_ATTR_ACTIVE, rx_sc->active) ||
3159 nla_put_sci(skb, MACSEC_RXSC_ATTR_SCI, rx_sc->sci,
3160 MACSEC_RXSC_ATTR_PAD)) {
3161 nla_nest_cancel(skb, rxsc_nest);
3162 nla_nest_cancel(skb, rxsc_list);
3163 goto nla_put_failure;
3166 attr = nla_nest_start_noflag(skb, MACSEC_RXSC_ATTR_STATS);
3168 nla_nest_cancel(skb, rxsc_nest);
3169 nla_nest_cancel(skb, rxsc_list);
3170 goto nla_put_failure;
3172 memset(&rx_sc_stats, 0, sizeof(rx_sc_stats));
3173 get_rx_sc_stats(dev, rx_sc, &rx_sc_stats);
3174 if (copy_rx_sc_stats(skb, &rx_sc_stats)) {
3175 nla_nest_cancel(skb, attr);
3176 nla_nest_cancel(skb, rxsc_nest);
3177 nla_nest_cancel(skb, rxsc_list);
3178 goto nla_put_failure;
3180 nla_nest_end(skb, attr);
3182 rxsa_list = nla_nest_start_noflag(skb,
3183 MACSEC_RXSC_ATTR_SA_LIST);
3185 nla_nest_cancel(skb, rxsc_nest);
3186 nla_nest_cancel(skb, rxsc_list);
3187 goto nla_put_failure;
3190 for (i = 0, k = 1; i < MACSEC_NUM_AN; i++) {
3191 struct macsec_rx_sa *rx_sa = rtnl_dereference(rx_sc->sa[i]);
3192 struct nlattr *rxsa_nest;
3199 rxsa_nest = nla_nest_start_noflag(skb, k++);
3201 nla_nest_cancel(skb, rxsa_list);
3202 nla_nest_cancel(skb, rxsc_nest);
3203 nla_nest_cancel(skb, rxsc_list);
3204 goto nla_put_failure;
3207 attr = nla_nest_start_noflag(skb,
3208 MACSEC_SA_ATTR_STATS);
3210 nla_nest_cancel(skb, rxsa_list);
3211 nla_nest_cancel(skb, rxsc_nest);
3212 nla_nest_cancel(skb, rxsc_list);
3213 goto nla_put_failure;
3215 memset(&rx_sa_stats, 0, sizeof(rx_sa_stats));
3216 get_rx_sa_stats(dev, rx_sc, i, rx_sa, &rx_sa_stats);
3217 if (copy_rx_sa_stats(skb, &rx_sa_stats)) {
3218 nla_nest_cancel(skb, attr);
3219 nla_nest_cancel(skb, rxsa_list);
3220 nla_nest_cancel(skb, rxsc_nest);
3221 nla_nest_cancel(skb, rxsc_list);
3222 goto nla_put_failure;
3224 nla_nest_end(skb, attr);
3227 pn = rx_sa->next_pn;
3228 pn_len = MACSEC_XPN_PN_LEN;
3230 pn = rx_sa->next_pn_halves.lower;
3231 pn_len = MACSEC_DEFAULT_PN_LEN;
3234 if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) ||
3235 nla_put(skb, MACSEC_SA_ATTR_PN, pn_len, &pn) ||
3236 nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, rx_sa->key.id) ||
3237 (secy->xpn && nla_put_ssci(skb, MACSEC_SA_ATTR_SSCI, rx_sa->ssci)) ||
3238 nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, rx_sa->active)) {
3239 nla_nest_cancel(skb, rxsa_nest);
3240 nla_nest_cancel(skb, rxsc_nest);
3241 nla_nest_cancel(skb, rxsc_list);
3242 goto nla_put_failure;
3244 nla_nest_end(skb, rxsa_nest);
3247 nla_nest_end(skb, rxsa_list);
3248 nla_nest_end(skb, rxsc_nest);
3251 nla_nest_end(skb, rxsc_list);
3253 genlmsg_end(skb, hdr);
3258 genlmsg_cancel(skb, hdr);
3262 static int macsec_generation = 1; /* protected by RTNL */
3264 static int macsec_dump_txsc(struct sk_buff *skb, struct netlink_callback *cb)
3266 struct net *net = sock_net(skb->sk);
3267 struct net_device *dev;
3270 dev_idx = cb->args[0];
3275 cb->seq = macsec_generation;
3277 for_each_netdev(net, dev) {
3278 struct macsec_secy *secy;
3283 if (!netif_is_macsec(dev))
3286 secy = &macsec_priv(dev)->secy;
3287 if (dump_secy(secy, dev, skb, cb) < 0)
3299 static const struct genl_small_ops macsec_genl_ops[] = {
3301 .cmd = MACSEC_CMD_GET_TXSC,
3302 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3303 .dumpit = macsec_dump_txsc,
3306 .cmd = MACSEC_CMD_ADD_RXSC,
3307 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3308 .doit = macsec_add_rxsc,
3309 .flags = GENL_ADMIN_PERM,
3312 .cmd = MACSEC_CMD_DEL_RXSC,
3313 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3314 .doit = macsec_del_rxsc,
3315 .flags = GENL_ADMIN_PERM,
3318 .cmd = MACSEC_CMD_UPD_RXSC,
3319 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3320 .doit = macsec_upd_rxsc,
3321 .flags = GENL_ADMIN_PERM,
3324 .cmd = MACSEC_CMD_ADD_TXSA,
3325 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3326 .doit = macsec_add_txsa,
3327 .flags = GENL_ADMIN_PERM,
3330 .cmd = MACSEC_CMD_DEL_TXSA,
3331 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3332 .doit = macsec_del_txsa,
3333 .flags = GENL_ADMIN_PERM,
3336 .cmd = MACSEC_CMD_UPD_TXSA,
3337 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3338 .doit = macsec_upd_txsa,
3339 .flags = GENL_ADMIN_PERM,
3342 .cmd = MACSEC_CMD_ADD_RXSA,
3343 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3344 .doit = macsec_add_rxsa,
3345 .flags = GENL_ADMIN_PERM,
3348 .cmd = MACSEC_CMD_DEL_RXSA,
3349 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3350 .doit = macsec_del_rxsa,
3351 .flags = GENL_ADMIN_PERM,
3354 .cmd = MACSEC_CMD_UPD_RXSA,
3355 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3356 .doit = macsec_upd_rxsa,
3357 .flags = GENL_ADMIN_PERM,
3360 .cmd = MACSEC_CMD_UPD_OFFLOAD,
3361 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3362 .doit = macsec_upd_offload,
3363 .flags = GENL_ADMIN_PERM,
3367 static struct genl_family macsec_fam __ro_after_init = {
3368 .name = MACSEC_GENL_NAME,
3370 .version = MACSEC_GENL_VERSION,
3371 .maxattr = MACSEC_ATTR_MAX,
3372 .policy = macsec_genl_policy,
3374 .module = THIS_MODULE,
3375 .small_ops = macsec_genl_ops,
3376 .n_small_ops = ARRAY_SIZE(macsec_genl_ops),
3377 .resv_start_op = MACSEC_CMD_UPD_OFFLOAD + 1,
3380 static netdev_tx_t macsec_start_xmit(struct sk_buff *skb,
3381 struct net_device *dev)
3383 struct macsec_dev *macsec = netdev_priv(dev);
3384 struct macsec_secy *secy = &macsec->secy;
3385 struct pcpu_secy_stats *secy_stats;
3388 if (macsec_is_offloaded(netdev_priv(dev))) {
3389 struct metadata_dst *md_dst = secy->tx_sc.md_dst;
3392 dst_hold(&md_dst->dst);
3393 skb_dst_set(skb, &md_dst->dst);
3394 skb->dev = macsec->real_dev;
3395 return dev_queue_xmit(skb);
3399 if (!secy->protect_frames) {
3400 secy_stats = this_cpu_ptr(macsec->stats);
3401 u64_stats_update_begin(&secy_stats->syncp);
3402 secy_stats->stats.OutPktsUntagged++;
3403 u64_stats_update_end(&secy_stats->syncp);
3404 skb->dev = macsec->real_dev;
3406 ret = dev_queue_xmit(skb);
3407 count_tx(dev, ret, len);
3411 if (!secy->operational) {
3413 dev->stats.tx_dropped++;
3414 return NETDEV_TX_OK;
3418 skb = macsec_encrypt(skb, dev);
3420 if (PTR_ERR(skb) != -EINPROGRESS)
3421 dev->stats.tx_dropped++;
3422 return NETDEV_TX_OK;
3425 macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa);
3427 macsec_encrypt_finish(skb, dev);
3428 ret = dev_queue_xmit(skb);
3429 count_tx(dev, ret, len);
3433 #define MACSEC_FEATURES \
3434 (NETIF_F_SG | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST)
3436 static int macsec_dev_init(struct net_device *dev)
3438 struct macsec_dev *macsec = macsec_priv(dev);
3439 struct net_device *real_dev = macsec->real_dev;
3442 dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
3446 err = gro_cells_init(&macsec->gro_cells, dev);
3448 free_percpu(dev->tstats);
3452 dev->features = real_dev->features & MACSEC_FEATURES;
3453 dev->features |= NETIF_F_LLTX | NETIF_F_GSO_SOFTWARE;
3455 dev->needed_headroom = real_dev->needed_headroom +
3456 MACSEC_NEEDED_HEADROOM;
3457 dev->needed_tailroom = real_dev->needed_tailroom +
3458 MACSEC_NEEDED_TAILROOM;
3460 if (is_zero_ether_addr(dev->dev_addr))
3461 eth_hw_addr_inherit(dev, real_dev);
3462 if (is_zero_ether_addr(dev->broadcast))
3463 memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len);
3465 /* Get macsec's reference to real_dev */
3466 netdev_hold(real_dev, &macsec->dev_tracker, GFP_KERNEL);
3471 static void macsec_dev_uninit(struct net_device *dev)
3473 struct macsec_dev *macsec = macsec_priv(dev);
3475 gro_cells_destroy(&macsec->gro_cells);
3476 free_percpu(dev->tstats);
3479 static netdev_features_t macsec_fix_features(struct net_device *dev,
3480 netdev_features_t features)
3482 struct macsec_dev *macsec = macsec_priv(dev);
3483 struct net_device *real_dev = macsec->real_dev;
3485 features &= (real_dev->features & MACSEC_FEATURES) |
3486 NETIF_F_GSO_SOFTWARE | NETIF_F_SOFT_FEATURES;
3487 features |= NETIF_F_LLTX;
3492 static int macsec_dev_open(struct net_device *dev)
3494 struct macsec_dev *macsec = macsec_priv(dev);
3495 struct net_device *real_dev = macsec->real_dev;
3498 err = dev_uc_add(real_dev, dev->dev_addr);
3502 if (dev->flags & IFF_ALLMULTI) {
3503 err = dev_set_allmulti(real_dev, 1);
3508 if (dev->flags & IFF_PROMISC) {
3509 err = dev_set_promiscuity(real_dev, 1);
3511 goto clear_allmulti;
3514 /* If h/w offloading is available, propagate to the device */
3515 if (macsec_is_offloaded(macsec)) {
3516 const struct macsec_ops *ops;
3517 struct macsec_context ctx;
3519 ops = macsec_get_ops(netdev_priv(dev), &ctx);
3522 goto clear_allmulti;
3525 ctx.secy = &macsec->secy;
3526 err = macsec_offload(ops->mdo_dev_open, &ctx);
3528 goto clear_allmulti;
3531 if (netif_carrier_ok(real_dev))
3532 netif_carrier_on(dev);
3536 if (dev->flags & IFF_ALLMULTI)
3537 dev_set_allmulti(real_dev, -1);
3539 dev_uc_del(real_dev, dev->dev_addr);
3540 netif_carrier_off(dev);
3544 static int macsec_dev_stop(struct net_device *dev)
3546 struct macsec_dev *macsec = macsec_priv(dev);
3547 struct net_device *real_dev = macsec->real_dev;
3549 netif_carrier_off(dev);
3551 /* If h/w offloading is available, propagate to the device */
3552 if (macsec_is_offloaded(macsec)) {
3553 const struct macsec_ops *ops;
3554 struct macsec_context ctx;
3556 ops = macsec_get_ops(macsec, &ctx);
3558 ctx.secy = &macsec->secy;
3559 macsec_offload(ops->mdo_dev_stop, &ctx);
3563 dev_mc_unsync(real_dev, dev);
3564 dev_uc_unsync(real_dev, dev);
3566 if (dev->flags & IFF_ALLMULTI)
3567 dev_set_allmulti(real_dev, -1);
3569 if (dev->flags & IFF_PROMISC)
3570 dev_set_promiscuity(real_dev, -1);
3572 dev_uc_del(real_dev, dev->dev_addr);
3577 static void macsec_dev_change_rx_flags(struct net_device *dev, int change)
3579 struct net_device *real_dev = macsec_priv(dev)->real_dev;
3581 if (!(dev->flags & IFF_UP))
3584 if (change & IFF_ALLMULTI)
3585 dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1);
3587 if (change & IFF_PROMISC)
3588 dev_set_promiscuity(real_dev,
3589 dev->flags & IFF_PROMISC ? 1 : -1);
3592 static void macsec_dev_set_rx_mode(struct net_device *dev)
3594 struct net_device *real_dev = macsec_priv(dev)->real_dev;
3596 dev_mc_sync(real_dev, dev);
3597 dev_uc_sync(real_dev, dev);
3600 static int macsec_set_mac_address(struct net_device *dev, void *p)
3602 struct macsec_dev *macsec = macsec_priv(dev);
3603 struct net_device *real_dev = macsec->real_dev;
3604 struct sockaddr *addr = p;
3607 if (!is_valid_ether_addr(addr->sa_data))
3608 return -EADDRNOTAVAIL;
3610 if (!(dev->flags & IFF_UP))
3613 err = dev_uc_add(real_dev, addr->sa_data);
3617 dev_uc_del(real_dev, dev->dev_addr);
3620 eth_hw_addr_set(dev, addr->sa_data);
3622 /* If h/w offloading is available, propagate to the device */
3623 if (macsec_is_offloaded(macsec)) {
3624 const struct macsec_ops *ops;
3625 struct macsec_context ctx;
3627 ops = macsec_get_ops(macsec, &ctx);
3629 ctx.secy = &macsec->secy;
3630 macsec_offload(ops->mdo_upd_secy, &ctx);
3637 static int macsec_change_mtu(struct net_device *dev, int new_mtu)
3639 struct macsec_dev *macsec = macsec_priv(dev);
3640 unsigned int extra = macsec->secy.icv_len + macsec_extra_len(true);
3642 if (macsec->real_dev->mtu - extra < new_mtu)
3650 static void macsec_get_stats64(struct net_device *dev,
3651 struct rtnl_link_stats64 *s)
3656 dev_fetch_sw_netstats(s, dev->tstats);
3658 s->rx_dropped = dev->stats.rx_dropped;
3659 s->tx_dropped = dev->stats.tx_dropped;
3660 s->rx_errors = dev->stats.rx_errors;
3663 static int macsec_get_iflink(const struct net_device *dev)
3665 return macsec_priv(dev)->real_dev->ifindex;
3668 static const struct net_device_ops macsec_netdev_ops = {
3669 .ndo_init = macsec_dev_init,
3670 .ndo_uninit = macsec_dev_uninit,
3671 .ndo_open = macsec_dev_open,
3672 .ndo_stop = macsec_dev_stop,
3673 .ndo_fix_features = macsec_fix_features,
3674 .ndo_change_mtu = macsec_change_mtu,
3675 .ndo_set_rx_mode = macsec_dev_set_rx_mode,
3676 .ndo_change_rx_flags = macsec_dev_change_rx_flags,
3677 .ndo_set_mac_address = macsec_set_mac_address,
3678 .ndo_start_xmit = macsec_start_xmit,
3679 .ndo_get_stats64 = macsec_get_stats64,
3680 .ndo_get_iflink = macsec_get_iflink,
3683 static const struct device_type macsec_type = {
3687 static const struct nla_policy macsec_rtnl_policy[IFLA_MACSEC_MAX + 1] = {
3688 [IFLA_MACSEC_SCI] = { .type = NLA_U64 },
3689 [IFLA_MACSEC_PORT] = { .type = NLA_U16 },
3690 [IFLA_MACSEC_ICV_LEN] = { .type = NLA_U8 },
3691 [IFLA_MACSEC_CIPHER_SUITE] = { .type = NLA_U64 },
3692 [IFLA_MACSEC_WINDOW] = { .type = NLA_U32 },
3693 [IFLA_MACSEC_ENCODING_SA] = { .type = NLA_U8 },
3694 [IFLA_MACSEC_ENCRYPT] = { .type = NLA_U8 },
3695 [IFLA_MACSEC_PROTECT] = { .type = NLA_U8 },
3696 [IFLA_MACSEC_INC_SCI] = { .type = NLA_U8 },
3697 [IFLA_MACSEC_ES] = { .type = NLA_U8 },
3698 [IFLA_MACSEC_SCB] = { .type = NLA_U8 },
3699 [IFLA_MACSEC_REPLAY_PROTECT] = { .type = NLA_U8 },
3700 [IFLA_MACSEC_VALIDATION] = { .type = NLA_U8 },
3703 static void macsec_free_netdev(struct net_device *dev)
3705 struct macsec_dev *macsec = macsec_priv(dev);
3707 if (macsec->secy.tx_sc.md_dst)
3708 metadata_dst_free(macsec->secy.tx_sc.md_dst);
3709 free_percpu(macsec->stats);
3710 free_percpu(macsec->secy.tx_sc.stats);
3712 /* Get rid of the macsec's reference to real_dev */
3713 netdev_put(macsec->real_dev, &macsec->dev_tracker);
3716 static void macsec_setup(struct net_device *dev)
3720 dev->max_mtu = ETH_MAX_MTU;
3721 dev->priv_flags |= IFF_NO_QUEUE;
3722 dev->netdev_ops = &macsec_netdev_ops;
3723 dev->needs_free_netdev = true;
3724 dev->priv_destructor = macsec_free_netdev;
3725 SET_NETDEV_DEVTYPE(dev, &macsec_type);
3727 eth_zero_addr(dev->broadcast);
3730 static int macsec_changelink_common(struct net_device *dev,
3731 struct nlattr *data[])
3733 struct macsec_secy *secy;
3734 struct macsec_tx_sc *tx_sc;
3736 secy = &macsec_priv(dev)->secy;
3737 tx_sc = &secy->tx_sc;
3739 if (data[IFLA_MACSEC_ENCODING_SA]) {
3740 struct macsec_tx_sa *tx_sa;
3742 tx_sc->encoding_sa = nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]);
3743 tx_sa = rtnl_dereference(tx_sc->sa[tx_sc->encoding_sa]);
3745 secy->operational = tx_sa && tx_sa->active;
3748 if (data[IFLA_MACSEC_ENCRYPT])
3749 tx_sc->encrypt = !!nla_get_u8(data[IFLA_MACSEC_ENCRYPT]);
3751 if (data[IFLA_MACSEC_PROTECT])
3752 secy->protect_frames = !!nla_get_u8(data[IFLA_MACSEC_PROTECT]);
3754 if (data[IFLA_MACSEC_INC_SCI])
3755 tx_sc->send_sci = !!nla_get_u8(data[IFLA_MACSEC_INC_SCI]);
3757 if (data[IFLA_MACSEC_ES])
3758 tx_sc->end_station = !!nla_get_u8(data[IFLA_MACSEC_ES]);
3760 if (data[IFLA_MACSEC_SCB])
3761 tx_sc->scb = !!nla_get_u8(data[IFLA_MACSEC_SCB]);
3763 if (data[IFLA_MACSEC_REPLAY_PROTECT])
3764 secy->replay_protect = !!nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT]);
3766 if (data[IFLA_MACSEC_VALIDATION])
3767 secy->validate_frames = nla_get_u8(data[IFLA_MACSEC_VALIDATION]);
3769 if (data[IFLA_MACSEC_CIPHER_SUITE]) {
3770 switch (nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE])) {
3771 case MACSEC_CIPHER_ID_GCM_AES_128:
3772 case MACSEC_DEFAULT_CIPHER_ID:
3773 secy->key_len = MACSEC_GCM_AES_128_SAK_LEN;
3776 case MACSEC_CIPHER_ID_GCM_AES_256:
3777 secy->key_len = MACSEC_GCM_AES_256_SAK_LEN;
3780 case MACSEC_CIPHER_ID_GCM_AES_XPN_128:
3781 secy->key_len = MACSEC_GCM_AES_128_SAK_LEN;
3784 case MACSEC_CIPHER_ID_GCM_AES_XPN_256:
3785 secy->key_len = MACSEC_GCM_AES_256_SAK_LEN;
3793 if (data[IFLA_MACSEC_WINDOW]) {
3794 secy->replay_window = nla_get_u32(data[IFLA_MACSEC_WINDOW]);
3796 /* IEEE 802.1AEbw-2013 10.7.8 - maximum replay window
3797 * for XPN cipher suites */
3799 secy->replay_window > MACSEC_XPN_MAX_REPLAY_WINDOW)
3806 static int macsec_changelink(struct net_device *dev, struct nlattr *tb[],
3807 struct nlattr *data[],
3808 struct netlink_ext_ack *extack)
3810 struct macsec_dev *macsec = macsec_priv(dev);
3811 struct macsec_tx_sc tx_sc;
3812 struct macsec_secy secy;
3818 if (data[IFLA_MACSEC_CIPHER_SUITE] ||
3819 data[IFLA_MACSEC_ICV_LEN] ||
3820 data[IFLA_MACSEC_SCI] ||
3821 data[IFLA_MACSEC_PORT])
3824 /* Keep a copy of unmodified secy and tx_sc, in case the offload
3825 * propagation fails, to revert macsec_changelink_common.
3827 memcpy(&secy, &macsec->secy, sizeof(secy));
3828 memcpy(&tx_sc, &macsec->secy.tx_sc, sizeof(tx_sc));
3830 ret = macsec_changelink_common(dev, data);
3834 /* If h/w offloading is available, propagate to the device */
3835 if (macsec_is_offloaded(macsec)) {
3836 const struct macsec_ops *ops;
3837 struct macsec_context ctx;
3840 ops = macsec_get_ops(netdev_priv(dev), &ctx);
3846 ctx.secy = &macsec->secy;
3847 ret = macsec_offload(ops->mdo_upd_secy, &ctx);
3855 memcpy(&macsec->secy.tx_sc, &tx_sc, sizeof(tx_sc));
3856 memcpy(&macsec->secy, &secy, sizeof(secy));
3861 static void macsec_del_dev(struct macsec_dev *macsec)
3865 while (macsec->secy.rx_sc) {
3866 struct macsec_rx_sc *rx_sc = rtnl_dereference(macsec->secy.rx_sc);
3868 rcu_assign_pointer(macsec->secy.rx_sc, rx_sc->next);
3872 for (i = 0; i < MACSEC_NUM_AN; i++) {
3873 struct macsec_tx_sa *sa = rtnl_dereference(macsec->secy.tx_sc.sa[i]);
3876 RCU_INIT_POINTER(macsec->secy.tx_sc.sa[i], NULL);
3882 static void macsec_common_dellink(struct net_device *dev, struct list_head *head)
3884 struct macsec_dev *macsec = macsec_priv(dev);
3885 struct net_device *real_dev = macsec->real_dev;
3887 /* If h/w offloading is available, propagate to the device */
3888 if (macsec_is_offloaded(macsec)) {
3889 const struct macsec_ops *ops;
3890 struct macsec_context ctx;
3892 ops = macsec_get_ops(netdev_priv(dev), &ctx);
3894 ctx.secy = &macsec->secy;
3895 macsec_offload(ops->mdo_del_secy, &ctx);
3899 unregister_netdevice_queue(dev, head);
3900 list_del_rcu(&macsec->secys);
3901 macsec_del_dev(macsec);
3902 netdev_upper_dev_unlink(real_dev, dev);
3904 macsec_generation++;
3907 static void macsec_dellink(struct net_device *dev, struct list_head *head)
3909 struct macsec_dev *macsec = macsec_priv(dev);
3910 struct net_device *real_dev = macsec->real_dev;
3911 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
3913 macsec_common_dellink(dev, head);
3915 if (list_empty(&rxd->secys)) {
3916 netdev_rx_handler_unregister(real_dev);
3921 static int register_macsec_dev(struct net_device *real_dev,
3922 struct net_device *dev)
3924 struct macsec_dev *macsec = macsec_priv(dev);
3925 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
3930 rxd = kmalloc(sizeof(*rxd), GFP_KERNEL);
3934 INIT_LIST_HEAD(&rxd->secys);
3936 err = netdev_rx_handler_register(real_dev, macsec_handle_frame,
3944 list_add_tail_rcu(&macsec->secys, &rxd->secys);
3948 static bool sci_exists(struct net_device *dev, sci_t sci)
3950 struct macsec_rxh_data *rxd = macsec_data_rtnl(dev);
3951 struct macsec_dev *macsec;
3953 list_for_each_entry(macsec, &rxd->secys, secys) {
3954 if (macsec->secy.sci == sci)
3961 static sci_t dev_to_sci(struct net_device *dev, __be16 port)
3963 return make_sci(dev->dev_addr, port);
3966 static int macsec_add_dev(struct net_device *dev, sci_t sci, u8 icv_len)
3968 struct macsec_dev *macsec = macsec_priv(dev);
3969 struct macsec_secy *secy = &macsec->secy;
3971 macsec->stats = netdev_alloc_pcpu_stats(struct pcpu_secy_stats);
3975 secy->tx_sc.stats = netdev_alloc_pcpu_stats(struct pcpu_tx_sc_stats);
3976 if (!secy->tx_sc.stats) {
3977 free_percpu(macsec->stats);
3981 secy->tx_sc.md_dst = metadata_dst_alloc(0, METADATA_MACSEC, GFP_KERNEL);
3982 if (!secy->tx_sc.md_dst) {
3983 free_percpu(secy->tx_sc.stats);
3984 free_percpu(macsec->stats);
3988 if (sci == MACSEC_UNDEF_SCI)
3989 sci = dev_to_sci(dev, MACSEC_PORT_ES);
3992 secy->operational = true;
3993 secy->key_len = DEFAULT_SAK_LEN;
3994 secy->icv_len = icv_len;
3995 secy->validate_frames = MACSEC_VALIDATE_DEFAULT;
3996 secy->protect_frames = true;
3997 secy->replay_protect = false;
3998 secy->xpn = DEFAULT_XPN;
4001 secy->tx_sc.md_dst->u.macsec_info.sci = sci;
4002 secy->tx_sc.active = true;
4003 secy->tx_sc.encoding_sa = DEFAULT_ENCODING_SA;
4004 secy->tx_sc.encrypt = DEFAULT_ENCRYPT;
4005 secy->tx_sc.send_sci = DEFAULT_SEND_SCI;
4006 secy->tx_sc.end_station = false;
4007 secy->tx_sc.scb = false;
4012 static struct lock_class_key macsec_netdev_addr_lock_key;
4014 static int macsec_newlink(struct net *net, struct net_device *dev,
4015 struct nlattr *tb[], struct nlattr *data[],
4016 struct netlink_ext_ack *extack)
4018 struct macsec_dev *macsec = macsec_priv(dev);
4019 rx_handler_func_t *rx_handler;
4020 u8 icv_len = MACSEC_DEFAULT_ICV_LEN;
4021 struct net_device *real_dev;
4027 real_dev = __dev_get_by_index(net, nla_get_u32(tb[IFLA_LINK]));
4030 if (real_dev->type != ARPHRD_ETHER)
4033 dev->priv_flags |= IFF_MACSEC;
4035 macsec->real_dev = real_dev;
4037 if (data && data[IFLA_MACSEC_OFFLOAD])
4038 macsec->offload = nla_get_offload(data[IFLA_MACSEC_OFFLOAD]);
4040 /* MACsec offloading is off by default */
4041 macsec->offload = MACSEC_OFFLOAD_OFF;
4043 /* Check if the offloading mode is supported by the underlying layers */
4044 if (macsec->offload != MACSEC_OFFLOAD_OFF &&
4045 !macsec_check_offload(macsec->offload, macsec))
4048 /* send_sci must be set to true when transmit sci explicitly is set */
4049 if ((data && data[IFLA_MACSEC_SCI]) &&
4050 (data && data[IFLA_MACSEC_INC_SCI])) {
4051 u8 send_sci = !!nla_get_u8(data[IFLA_MACSEC_INC_SCI]);
4057 if (data && data[IFLA_MACSEC_ICV_LEN])
4058 icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]);
4059 mtu = real_dev->mtu - icv_len - macsec_extra_len(true);
4065 rx_handler = rtnl_dereference(real_dev->rx_handler);
4066 if (rx_handler && rx_handler != macsec_handle_frame)
4069 err = register_netdevice(dev);
4073 netdev_lockdep_set_classes(dev);
4074 lockdep_set_class(&dev->addr_list_lock,
4075 &macsec_netdev_addr_lock_key);
4077 err = netdev_upper_dev_link(real_dev, dev, extack);
4081 /* need to be already registered so that ->init has run and
4082 * the MAC addr is set
4084 if (data && data[IFLA_MACSEC_SCI])
4085 sci = nla_get_sci(data[IFLA_MACSEC_SCI]);
4086 else if (data && data[IFLA_MACSEC_PORT])
4087 sci = dev_to_sci(dev, nla_get_be16(data[IFLA_MACSEC_PORT]));
4089 sci = dev_to_sci(dev, MACSEC_PORT_ES);
4091 if (rx_handler && sci_exists(real_dev, sci)) {
4096 err = macsec_add_dev(dev, sci, icv_len);
4101 err = macsec_changelink_common(dev, data);
4106 /* If h/w offloading is available, propagate to the device */
4107 if (macsec_is_offloaded(macsec)) {
4108 const struct macsec_ops *ops;
4109 struct macsec_context ctx;
4111 ops = macsec_get_ops(macsec, &ctx);
4113 ctx.secy = &macsec->secy;
4114 err = macsec_offload(ops->mdo_add_secy, &ctx);
4120 err = register_macsec_dev(real_dev, dev);
4124 netif_stacked_transfer_operstate(real_dev, dev);
4125 linkwatch_fire_event(dev);
4127 macsec_generation++;
4132 macsec_del_dev(macsec);
4134 netdev_upper_dev_unlink(real_dev, dev);
4136 unregister_netdevice(dev);
4140 static int macsec_validate_attr(struct nlattr *tb[], struct nlattr *data[],
4141 struct netlink_ext_ack *extack)
4143 u64 csid = MACSEC_DEFAULT_CIPHER_ID;
4144 u8 icv_len = MACSEC_DEFAULT_ICV_LEN;
4151 if (data[IFLA_MACSEC_CIPHER_SUITE])
4152 csid = nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE]);
4154 if (data[IFLA_MACSEC_ICV_LEN]) {
4155 icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]);
4156 if (icv_len != MACSEC_DEFAULT_ICV_LEN) {
4157 char dummy_key[DEFAULT_SAK_LEN] = { 0 };
4158 struct crypto_aead *dummy_tfm;
4160 dummy_tfm = macsec_alloc_tfm(dummy_key,
4163 if (IS_ERR(dummy_tfm))
4164 return PTR_ERR(dummy_tfm);
4165 crypto_free_aead(dummy_tfm);
4170 case MACSEC_CIPHER_ID_GCM_AES_128:
4171 case MACSEC_CIPHER_ID_GCM_AES_256:
4172 case MACSEC_CIPHER_ID_GCM_AES_XPN_128:
4173 case MACSEC_CIPHER_ID_GCM_AES_XPN_256:
4174 case MACSEC_DEFAULT_CIPHER_ID:
4175 if (icv_len < MACSEC_MIN_ICV_LEN ||
4176 icv_len > MACSEC_STD_ICV_LEN)
4183 if (data[IFLA_MACSEC_ENCODING_SA]) {
4184 if (nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]) >= MACSEC_NUM_AN)
4188 for (flag = IFLA_MACSEC_ENCODING_SA + 1;
4189 flag < IFLA_MACSEC_VALIDATION;
4192 if (nla_get_u8(data[flag]) > 1)
4197 es = data[IFLA_MACSEC_ES] ? nla_get_u8(data[IFLA_MACSEC_ES]) : false;
4198 sci = data[IFLA_MACSEC_INC_SCI] ? nla_get_u8(data[IFLA_MACSEC_INC_SCI]) : false;
4199 scb = data[IFLA_MACSEC_SCB] ? nla_get_u8(data[IFLA_MACSEC_SCB]) : false;
4201 if ((sci && (scb || es)) || (scb && es))
4204 if (data[IFLA_MACSEC_VALIDATION] &&
4205 nla_get_u8(data[IFLA_MACSEC_VALIDATION]) > MACSEC_VALIDATE_MAX)
4208 if ((data[IFLA_MACSEC_REPLAY_PROTECT] &&
4209 nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT])) &&
4210 !data[IFLA_MACSEC_WINDOW])
4216 static struct net *macsec_get_link_net(const struct net_device *dev)
4218 return dev_net(macsec_priv(dev)->real_dev);
4221 static size_t macsec_get_size(const struct net_device *dev)
4223 return nla_total_size_64bit(8) + /* IFLA_MACSEC_SCI */
4224 nla_total_size(1) + /* IFLA_MACSEC_ICV_LEN */
4225 nla_total_size_64bit(8) + /* IFLA_MACSEC_CIPHER_SUITE */
4226 nla_total_size(4) + /* IFLA_MACSEC_WINDOW */
4227 nla_total_size(1) + /* IFLA_MACSEC_ENCODING_SA */
4228 nla_total_size(1) + /* IFLA_MACSEC_ENCRYPT */
4229 nla_total_size(1) + /* IFLA_MACSEC_PROTECT */
4230 nla_total_size(1) + /* IFLA_MACSEC_INC_SCI */
4231 nla_total_size(1) + /* IFLA_MACSEC_ES */
4232 nla_total_size(1) + /* IFLA_MACSEC_SCB */
4233 nla_total_size(1) + /* IFLA_MACSEC_REPLAY_PROTECT */
4234 nla_total_size(1) + /* IFLA_MACSEC_VALIDATION */
4238 static int macsec_fill_info(struct sk_buff *skb,
4239 const struct net_device *dev)
4241 struct macsec_secy *secy = &macsec_priv(dev)->secy;
4242 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
4245 switch (secy->key_len) {
4246 case MACSEC_GCM_AES_128_SAK_LEN:
4247 csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_128 : MACSEC_DEFAULT_CIPHER_ID;
4249 case MACSEC_GCM_AES_256_SAK_LEN:
4250 csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_256 : MACSEC_CIPHER_ID_GCM_AES_256;
4253 goto nla_put_failure;
4256 if (nla_put_sci(skb, IFLA_MACSEC_SCI, secy->sci,
4258 nla_put_u8(skb, IFLA_MACSEC_ICV_LEN, secy->icv_len) ||
4259 nla_put_u64_64bit(skb, IFLA_MACSEC_CIPHER_SUITE,
4260 csid, IFLA_MACSEC_PAD) ||
4261 nla_put_u8(skb, IFLA_MACSEC_ENCODING_SA, tx_sc->encoding_sa) ||
4262 nla_put_u8(skb, IFLA_MACSEC_ENCRYPT, tx_sc->encrypt) ||
4263 nla_put_u8(skb, IFLA_MACSEC_PROTECT, secy->protect_frames) ||
4264 nla_put_u8(skb, IFLA_MACSEC_INC_SCI, tx_sc->send_sci) ||
4265 nla_put_u8(skb, IFLA_MACSEC_ES, tx_sc->end_station) ||
4266 nla_put_u8(skb, IFLA_MACSEC_SCB, tx_sc->scb) ||
4267 nla_put_u8(skb, IFLA_MACSEC_REPLAY_PROTECT, secy->replay_protect) ||
4268 nla_put_u8(skb, IFLA_MACSEC_VALIDATION, secy->validate_frames) ||
4270 goto nla_put_failure;
4272 if (secy->replay_protect) {
4273 if (nla_put_u32(skb, IFLA_MACSEC_WINDOW, secy->replay_window))
4274 goto nla_put_failure;
4283 static struct rtnl_link_ops macsec_link_ops __read_mostly = {
4285 .priv_size = sizeof(struct macsec_dev),
4286 .maxtype = IFLA_MACSEC_MAX,
4287 .policy = macsec_rtnl_policy,
4288 .setup = macsec_setup,
4289 .validate = macsec_validate_attr,
4290 .newlink = macsec_newlink,
4291 .changelink = macsec_changelink,
4292 .dellink = macsec_dellink,
4293 .get_size = macsec_get_size,
4294 .fill_info = macsec_fill_info,
4295 .get_link_net = macsec_get_link_net,
4298 static bool is_macsec_master(struct net_device *dev)
4300 return rcu_access_pointer(dev->rx_handler) == macsec_handle_frame;
4303 static int macsec_notify(struct notifier_block *this, unsigned long event,
4306 struct net_device *real_dev = netdev_notifier_info_to_dev(ptr);
4309 if (!is_macsec_master(real_dev))
4315 case NETDEV_CHANGE: {
4316 struct macsec_dev *m, *n;
4317 struct macsec_rxh_data *rxd;
4319 rxd = macsec_data_rtnl(real_dev);
4320 list_for_each_entry_safe(m, n, &rxd->secys, secys) {
4321 struct net_device *dev = m->secy.netdev;
4323 netif_stacked_transfer_operstate(real_dev, dev);
4327 case NETDEV_UNREGISTER: {
4328 struct macsec_dev *m, *n;
4329 struct macsec_rxh_data *rxd;
4331 rxd = macsec_data_rtnl(real_dev);
4332 list_for_each_entry_safe(m, n, &rxd->secys, secys) {
4333 macsec_common_dellink(m->secy.netdev, &head);
4336 netdev_rx_handler_unregister(real_dev);
4339 unregister_netdevice_many(&head);
4342 case NETDEV_CHANGEMTU: {
4343 struct macsec_dev *m;
4344 struct macsec_rxh_data *rxd;
4346 rxd = macsec_data_rtnl(real_dev);
4347 list_for_each_entry(m, &rxd->secys, secys) {
4348 struct net_device *dev = m->secy.netdev;
4349 unsigned int mtu = real_dev->mtu - (m->secy.icv_len +
4350 macsec_extra_len(true));
4353 dev_set_mtu(dev, mtu);
4361 static struct notifier_block macsec_notifier = {
4362 .notifier_call = macsec_notify,
4365 static int __init macsec_init(void)
4369 pr_info("MACsec IEEE 802.1AE\n");
4370 err = register_netdevice_notifier(&macsec_notifier);
4374 err = rtnl_link_register(&macsec_link_ops);
4378 err = genl_register_family(&macsec_fam);
4385 rtnl_link_unregister(&macsec_link_ops);
4387 unregister_netdevice_notifier(&macsec_notifier);
4391 static void __exit macsec_exit(void)
4393 genl_unregister_family(&macsec_fam);
4394 rtnl_link_unregister(&macsec_link_ops);
4395 unregister_netdevice_notifier(&macsec_notifier);
4399 module_init(macsec_init);
4400 module_exit(macsec_exit);
4402 MODULE_ALIAS_RTNL_LINK("macsec");
4403 MODULE_ALIAS_GENL_FAMILY("macsec");
4405 MODULE_DESCRIPTION("MACsec IEEE 802.1AE");
4406 MODULE_LICENSE("GPL v2");