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)
1418 struct macsec_rx_sc *rx_sc;
1419 struct macsec_dev *macsec;
1420 struct net_device *real_dev = macsec_priv(dev)->real_dev;
1421 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
1422 struct macsec_secy *secy;
1424 list_for_each_entry(macsec, &rxd->secys, secys) {
1425 if (find_rx_sc_rtnl(&macsec->secy, sci))
1426 return ERR_PTR(-EEXIST);
1429 rx_sc = kzalloc(sizeof(*rx_sc), GFP_KERNEL);
1431 return ERR_PTR(-ENOMEM);
1433 rx_sc->stats = netdev_alloc_pcpu_stats(struct pcpu_rx_sc_stats);
1434 if (!rx_sc->stats) {
1436 return ERR_PTR(-ENOMEM);
1440 rx_sc->active = true;
1441 refcount_set(&rx_sc->refcnt, 1);
1443 secy = &macsec_priv(dev)->secy;
1444 rcu_assign_pointer(rx_sc->next, secy->rx_sc);
1445 rcu_assign_pointer(secy->rx_sc, rx_sc);
1453 static int init_tx_sa(struct macsec_tx_sa *tx_sa, char *sak, int key_len,
1456 tx_sa->stats = alloc_percpu(struct macsec_tx_sa_stats);
1460 tx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len);
1461 if (IS_ERR(tx_sa->key.tfm)) {
1462 free_percpu(tx_sa->stats);
1463 return PTR_ERR(tx_sa->key.tfm);
1466 tx_sa->ssci = MACSEC_UNDEF_SSCI;
1467 tx_sa->active = false;
1468 refcount_set(&tx_sa->refcnt, 1);
1469 spin_lock_init(&tx_sa->lock);
1474 static void clear_tx_sa(struct macsec_tx_sa *tx_sa)
1476 tx_sa->active = false;
1478 macsec_txsa_put(tx_sa);
1481 static struct genl_family macsec_fam;
1483 static struct net_device *get_dev_from_nl(struct net *net,
1484 struct nlattr **attrs)
1486 int ifindex = nla_get_u32(attrs[MACSEC_ATTR_IFINDEX]);
1487 struct net_device *dev;
1489 dev = __dev_get_by_index(net, ifindex);
1491 return ERR_PTR(-ENODEV);
1493 if (!netif_is_macsec(dev))
1494 return ERR_PTR(-ENODEV);
1499 static enum macsec_offload nla_get_offload(const struct nlattr *nla)
1501 return (__force enum macsec_offload)nla_get_u8(nla);
1504 static sci_t nla_get_sci(const struct nlattr *nla)
1506 return (__force sci_t)nla_get_u64(nla);
1509 static int nla_put_sci(struct sk_buff *skb, int attrtype, sci_t value,
1512 return nla_put_u64_64bit(skb, attrtype, (__force u64)value, padattr);
1515 static ssci_t nla_get_ssci(const struct nlattr *nla)
1517 return (__force ssci_t)nla_get_u32(nla);
1520 static int nla_put_ssci(struct sk_buff *skb, int attrtype, ssci_t value)
1522 return nla_put_u32(skb, attrtype, (__force u64)value);
1525 static struct macsec_tx_sa *get_txsa_from_nl(struct net *net,
1526 struct nlattr **attrs,
1527 struct nlattr **tb_sa,
1528 struct net_device **devp,
1529 struct macsec_secy **secyp,
1530 struct macsec_tx_sc **scp,
1533 struct net_device *dev;
1534 struct macsec_secy *secy;
1535 struct macsec_tx_sc *tx_sc;
1536 struct macsec_tx_sa *tx_sa;
1538 if (!tb_sa[MACSEC_SA_ATTR_AN])
1539 return ERR_PTR(-EINVAL);
1541 *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1543 dev = get_dev_from_nl(net, attrs);
1545 return ERR_CAST(dev);
1547 if (*assoc_num >= MACSEC_NUM_AN)
1548 return ERR_PTR(-EINVAL);
1550 secy = &macsec_priv(dev)->secy;
1551 tx_sc = &secy->tx_sc;
1553 tx_sa = rtnl_dereference(tx_sc->sa[*assoc_num]);
1555 return ERR_PTR(-ENODEV);
1563 static struct macsec_rx_sc *get_rxsc_from_nl(struct net *net,
1564 struct nlattr **attrs,
1565 struct nlattr **tb_rxsc,
1566 struct net_device **devp,
1567 struct macsec_secy **secyp)
1569 struct net_device *dev;
1570 struct macsec_secy *secy;
1571 struct macsec_rx_sc *rx_sc;
1574 dev = get_dev_from_nl(net, attrs);
1576 return ERR_CAST(dev);
1578 secy = &macsec_priv(dev)->secy;
1580 if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI])
1581 return ERR_PTR(-EINVAL);
1583 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1584 rx_sc = find_rx_sc_rtnl(secy, sci);
1586 return ERR_PTR(-ENODEV);
1594 static struct macsec_rx_sa *get_rxsa_from_nl(struct net *net,
1595 struct nlattr **attrs,
1596 struct nlattr **tb_rxsc,
1597 struct nlattr **tb_sa,
1598 struct net_device **devp,
1599 struct macsec_secy **secyp,
1600 struct macsec_rx_sc **scp,
1603 struct macsec_rx_sc *rx_sc;
1604 struct macsec_rx_sa *rx_sa;
1606 if (!tb_sa[MACSEC_SA_ATTR_AN])
1607 return ERR_PTR(-EINVAL);
1609 *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1610 if (*assoc_num >= MACSEC_NUM_AN)
1611 return ERR_PTR(-EINVAL);
1613 rx_sc = get_rxsc_from_nl(net, attrs, tb_rxsc, devp, secyp);
1615 return ERR_CAST(rx_sc);
1617 rx_sa = rtnl_dereference(rx_sc->sa[*assoc_num]);
1619 return ERR_PTR(-ENODEV);
1625 static const struct nla_policy macsec_genl_policy[NUM_MACSEC_ATTR] = {
1626 [MACSEC_ATTR_IFINDEX] = { .type = NLA_U32 },
1627 [MACSEC_ATTR_RXSC_CONFIG] = { .type = NLA_NESTED },
1628 [MACSEC_ATTR_SA_CONFIG] = { .type = NLA_NESTED },
1629 [MACSEC_ATTR_OFFLOAD] = { .type = NLA_NESTED },
1632 static const struct nla_policy macsec_genl_rxsc_policy[NUM_MACSEC_RXSC_ATTR] = {
1633 [MACSEC_RXSC_ATTR_SCI] = { .type = NLA_U64 },
1634 [MACSEC_RXSC_ATTR_ACTIVE] = { .type = NLA_U8 },
1637 static const struct nla_policy macsec_genl_sa_policy[NUM_MACSEC_SA_ATTR] = {
1638 [MACSEC_SA_ATTR_AN] = { .type = NLA_U8 },
1639 [MACSEC_SA_ATTR_ACTIVE] = { .type = NLA_U8 },
1640 [MACSEC_SA_ATTR_PN] = NLA_POLICY_MIN_LEN(4),
1641 [MACSEC_SA_ATTR_KEYID] = { .type = NLA_BINARY,
1642 .len = MACSEC_KEYID_LEN, },
1643 [MACSEC_SA_ATTR_KEY] = { .type = NLA_BINARY,
1644 .len = MACSEC_MAX_KEY_LEN, },
1645 [MACSEC_SA_ATTR_SSCI] = { .type = NLA_U32 },
1646 [MACSEC_SA_ATTR_SALT] = { .type = NLA_BINARY,
1647 .len = MACSEC_SALT_LEN, },
1650 static const struct nla_policy macsec_genl_offload_policy[NUM_MACSEC_OFFLOAD_ATTR] = {
1651 [MACSEC_OFFLOAD_ATTR_TYPE] = { .type = NLA_U8 },
1654 /* Offloads an operation to a device driver */
1655 static int macsec_offload(int (* const func)(struct macsec_context *),
1656 struct macsec_context *ctx)
1660 if (unlikely(!func))
1663 if (ctx->offload == MACSEC_OFFLOAD_PHY)
1664 mutex_lock(&ctx->phydev->lock);
1668 if (ctx->offload == MACSEC_OFFLOAD_PHY)
1669 mutex_unlock(&ctx->phydev->lock);
1674 static int parse_sa_config(struct nlattr **attrs, struct nlattr **tb_sa)
1676 if (!attrs[MACSEC_ATTR_SA_CONFIG])
1679 if (nla_parse_nested_deprecated(tb_sa, MACSEC_SA_ATTR_MAX, attrs[MACSEC_ATTR_SA_CONFIG], macsec_genl_sa_policy, NULL))
1685 static int parse_rxsc_config(struct nlattr **attrs, struct nlattr **tb_rxsc)
1687 if (!attrs[MACSEC_ATTR_RXSC_CONFIG])
1690 if (nla_parse_nested_deprecated(tb_rxsc, MACSEC_RXSC_ATTR_MAX, attrs[MACSEC_ATTR_RXSC_CONFIG], macsec_genl_rxsc_policy, NULL))
1696 static bool validate_add_rxsa(struct nlattr **attrs)
1698 if (!attrs[MACSEC_SA_ATTR_AN] ||
1699 !attrs[MACSEC_SA_ATTR_KEY] ||
1700 !attrs[MACSEC_SA_ATTR_KEYID])
1703 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
1706 if (attrs[MACSEC_SA_ATTR_PN] &&
1707 nla_get_u64(attrs[MACSEC_SA_ATTR_PN]) == 0)
1710 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
1711 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
1715 if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN)
1721 static int macsec_add_rxsa(struct sk_buff *skb, struct genl_info *info)
1723 struct net_device *dev;
1724 struct nlattr **attrs = info->attrs;
1725 struct macsec_secy *secy;
1726 struct macsec_rx_sc *rx_sc;
1727 struct macsec_rx_sa *rx_sa;
1728 unsigned char assoc_num;
1730 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1731 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1734 if (!attrs[MACSEC_ATTR_IFINDEX])
1737 if (parse_sa_config(attrs, tb_sa))
1740 if (parse_rxsc_config(attrs, tb_rxsc))
1743 if (!validate_add_rxsa(tb_sa))
1747 rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy);
1748 if (IS_ERR(rx_sc)) {
1750 return PTR_ERR(rx_sc);
1753 assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1755 if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) {
1756 pr_notice("macsec: nl: add_rxsa: bad key length: %d != %d\n",
1757 nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len);
1762 pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
1763 if (tb_sa[MACSEC_SA_ATTR_PN] &&
1764 nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
1765 pr_notice("macsec: nl: add_rxsa: bad pn length: %d != %d\n",
1766 nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
1772 if (!tb_sa[MACSEC_SA_ATTR_SSCI] || !tb_sa[MACSEC_SA_ATTR_SALT]) {
1777 if (nla_len(tb_sa[MACSEC_SA_ATTR_SALT]) != MACSEC_SALT_LEN) {
1778 pr_notice("macsec: nl: add_rxsa: bad salt length: %d != %d\n",
1779 nla_len(tb_sa[MACSEC_SA_ATTR_SALT]),
1786 rx_sa = rtnl_dereference(rx_sc->sa[assoc_num]);
1792 rx_sa = kmalloc(sizeof(*rx_sa), GFP_KERNEL);
1798 err = init_rx_sa(rx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
1799 secy->key_len, secy->icv_len);
1806 if (tb_sa[MACSEC_SA_ATTR_PN]) {
1807 spin_lock_bh(&rx_sa->lock);
1808 rx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
1809 spin_unlock_bh(&rx_sa->lock);
1812 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
1813 rx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
1818 rx_sa->ssci = nla_get_ssci(tb_sa[MACSEC_SA_ATTR_SSCI]);
1819 nla_memcpy(rx_sa->key.salt.bytes, tb_sa[MACSEC_SA_ATTR_SALT],
1823 /* If h/w offloading is available, propagate to the device */
1824 if (macsec_is_offloaded(netdev_priv(dev))) {
1825 const struct macsec_ops *ops;
1826 struct macsec_context ctx;
1828 ops = macsec_get_ops(netdev_priv(dev), &ctx);
1834 ctx.sa.assoc_num = assoc_num;
1835 ctx.sa.rx_sa = rx_sa;
1837 memcpy(ctx.sa.key, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
1840 err = macsec_offload(ops->mdo_add_rxsa, &ctx);
1845 nla_memcpy(rx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN);
1846 rcu_assign_pointer(rx_sc->sa[assoc_num], rx_sa);
1853 macsec_rxsa_put(rx_sa);
1858 static bool validate_add_rxsc(struct nlattr **attrs)
1860 if (!attrs[MACSEC_RXSC_ATTR_SCI])
1863 if (attrs[MACSEC_RXSC_ATTR_ACTIVE]) {
1864 if (nla_get_u8(attrs[MACSEC_RXSC_ATTR_ACTIVE]) > 1)
1871 static int macsec_add_rxsc(struct sk_buff *skb, struct genl_info *info)
1873 struct net_device *dev;
1874 sci_t sci = MACSEC_UNDEF_SCI;
1875 struct nlattr **attrs = info->attrs;
1876 struct macsec_rx_sc *rx_sc;
1877 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1878 struct macsec_secy *secy;
1882 if (!attrs[MACSEC_ATTR_IFINDEX])
1885 if (parse_rxsc_config(attrs, tb_rxsc))
1888 if (!validate_add_rxsc(tb_rxsc))
1892 dev = get_dev_from_nl(genl_info_net(info), attrs);
1895 return PTR_ERR(dev);
1898 secy = &macsec_priv(dev)->secy;
1899 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1901 rx_sc = create_rx_sc(dev, sci);
1902 if (IS_ERR(rx_sc)) {
1904 return PTR_ERR(rx_sc);
1907 was_active = rx_sc->active;
1908 if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE])
1909 rx_sc->active = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]);
1911 if (macsec_is_offloaded(netdev_priv(dev))) {
1912 const struct macsec_ops *ops;
1913 struct macsec_context ctx;
1915 ops = macsec_get_ops(netdev_priv(dev), &ctx);
1924 ret = macsec_offload(ops->mdo_add_rxsc, &ctx);
1934 rx_sc->active = was_active;
1939 static bool validate_add_txsa(struct nlattr **attrs)
1941 if (!attrs[MACSEC_SA_ATTR_AN] ||
1942 !attrs[MACSEC_SA_ATTR_PN] ||
1943 !attrs[MACSEC_SA_ATTR_KEY] ||
1944 !attrs[MACSEC_SA_ATTR_KEYID])
1947 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
1950 if (nla_get_u64(attrs[MACSEC_SA_ATTR_PN]) == 0)
1953 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
1954 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
1958 if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN)
1964 static int macsec_add_txsa(struct sk_buff *skb, struct genl_info *info)
1966 struct net_device *dev;
1967 struct nlattr **attrs = info->attrs;
1968 struct macsec_secy *secy;
1969 struct macsec_tx_sc *tx_sc;
1970 struct macsec_tx_sa *tx_sa;
1971 unsigned char assoc_num;
1973 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1974 bool was_operational;
1977 if (!attrs[MACSEC_ATTR_IFINDEX])
1980 if (parse_sa_config(attrs, tb_sa))
1983 if (!validate_add_txsa(tb_sa))
1987 dev = get_dev_from_nl(genl_info_net(info), attrs);
1990 return PTR_ERR(dev);
1993 secy = &macsec_priv(dev)->secy;
1994 tx_sc = &secy->tx_sc;
1996 assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1998 if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) {
1999 pr_notice("macsec: nl: add_txsa: bad key length: %d != %d\n",
2000 nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len);
2005 pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
2006 if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
2007 pr_notice("macsec: nl: add_txsa: bad pn length: %d != %d\n",
2008 nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
2014 if (!tb_sa[MACSEC_SA_ATTR_SSCI] || !tb_sa[MACSEC_SA_ATTR_SALT]) {
2019 if (nla_len(tb_sa[MACSEC_SA_ATTR_SALT]) != MACSEC_SALT_LEN) {
2020 pr_notice("macsec: nl: add_txsa: bad salt length: %d != %d\n",
2021 nla_len(tb_sa[MACSEC_SA_ATTR_SALT]),
2028 tx_sa = rtnl_dereference(tx_sc->sa[assoc_num]);
2034 tx_sa = kmalloc(sizeof(*tx_sa), GFP_KERNEL);
2040 err = init_tx_sa(tx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
2041 secy->key_len, secy->icv_len);
2048 spin_lock_bh(&tx_sa->lock);
2049 tx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
2050 spin_unlock_bh(&tx_sa->lock);
2052 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2053 tx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2055 was_operational = secy->operational;
2056 if (assoc_num == tx_sc->encoding_sa && tx_sa->active)
2057 secy->operational = true;
2060 tx_sa->ssci = nla_get_ssci(tb_sa[MACSEC_SA_ATTR_SSCI]);
2061 nla_memcpy(tx_sa->key.salt.bytes, tb_sa[MACSEC_SA_ATTR_SALT],
2065 /* If h/w offloading is available, propagate to the device */
2066 if (macsec_is_offloaded(netdev_priv(dev))) {
2067 const struct macsec_ops *ops;
2068 struct macsec_context ctx;
2070 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2076 ctx.sa.assoc_num = assoc_num;
2077 ctx.sa.tx_sa = tx_sa;
2079 memcpy(ctx.sa.key, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
2082 err = macsec_offload(ops->mdo_add_txsa, &ctx);
2087 nla_memcpy(tx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN);
2088 rcu_assign_pointer(tx_sc->sa[assoc_num], tx_sa);
2095 secy->operational = was_operational;
2096 macsec_txsa_put(tx_sa);
2101 static int macsec_del_rxsa(struct sk_buff *skb, struct genl_info *info)
2103 struct nlattr **attrs = info->attrs;
2104 struct net_device *dev;
2105 struct macsec_secy *secy;
2106 struct macsec_rx_sc *rx_sc;
2107 struct macsec_rx_sa *rx_sa;
2109 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2110 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2113 if (!attrs[MACSEC_ATTR_IFINDEX])
2116 if (parse_sa_config(attrs, tb_sa))
2119 if (parse_rxsc_config(attrs, tb_rxsc))
2123 rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa,
2124 &dev, &secy, &rx_sc, &assoc_num);
2125 if (IS_ERR(rx_sa)) {
2127 return PTR_ERR(rx_sa);
2130 if (rx_sa->active) {
2135 /* If h/w offloading is available, propagate to the device */
2136 if (macsec_is_offloaded(netdev_priv(dev))) {
2137 const struct macsec_ops *ops;
2138 struct macsec_context ctx;
2140 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2146 ctx.sa.assoc_num = assoc_num;
2147 ctx.sa.rx_sa = rx_sa;
2150 ret = macsec_offload(ops->mdo_del_rxsa, &ctx);
2155 RCU_INIT_POINTER(rx_sc->sa[assoc_num], NULL);
2167 static int macsec_del_rxsc(struct sk_buff *skb, struct genl_info *info)
2169 struct nlattr **attrs = info->attrs;
2170 struct net_device *dev;
2171 struct macsec_secy *secy;
2172 struct macsec_rx_sc *rx_sc;
2174 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2177 if (!attrs[MACSEC_ATTR_IFINDEX])
2180 if (parse_rxsc_config(attrs, tb_rxsc))
2183 if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI])
2187 dev = get_dev_from_nl(genl_info_net(info), info->attrs);
2190 return PTR_ERR(dev);
2193 secy = &macsec_priv(dev)->secy;
2194 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
2196 rx_sc = del_rx_sc(secy, sci);
2202 /* If h/w offloading is available, propagate to the device */
2203 if (macsec_is_offloaded(netdev_priv(dev))) {
2204 const struct macsec_ops *ops;
2205 struct macsec_context ctx;
2207 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2215 ret = macsec_offload(ops->mdo_del_rxsc, &ctx);
2230 static int macsec_del_txsa(struct sk_buff *skb, struct genl_info *info)
2232 struct nlattr **attrs = info->attrs;
2233 struct net_device *dev;
2234 struct macsec_secy *secy;
2235 struct macsec_tx_sc *tx_sc;
2236 struct macsec_tx_sa *tx_sa;
2238 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2241 if (!attrs[MACSEC_ATTR_IFINDEX])
2244 if (parse_sa_config(attrs, tb_sa))
2248 tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa,
2249 &dev, &secy, &tx_sc, &assoc_num);
2250 if (IS_ERR(tx_sa)) {
2252 return PTR_ERR(tx_sa);
2255 if (tx_sa->active) {
2260 /* If h/w offloading is available, propagate to the device */
2261 if (macsec_is_offloaded(netdev_priv(dev))) {
2262 const struct macsec_ops *ops;
2263 struct macsec_context ctx;
2265 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2271 ctx.sa.assoc_num = assoc_num;
2272 ctx.sa.tx_sa = tx_sa;
2275 ret = macsec_offload(ops->mdo_del_txsa, &ctx);
2280 RCU_INIT_POINTER(tx_sc->sa[assoc_num], NULL);
2292 static bool validate_upd_sa(struct nlattr **attrs)
2294 if (!attrs[MACSEC_SA_ATTR_AN] ||
2295 attrs[MACSEC_SA_ATTR_KEY] ||
2296 attrs[MACSEC_SA_ATTR_KEYID] ||
2297 attrs[MACSEC_SA_ATTR_SSCI] ||
2298 attrs[MACSEC_SA_ATTR_SALT])
2301 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
2304 if (attrs[MACSEC_SA_ATTR_PN] && nla_get_u64(attrs[MACSEC_SA_ATTR_PN]) == 0)
2307 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
2308 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
2315 static int macsec_upd_txsa(struct sk_buff *skb, struct genl_info *info)
2317 struct nlattr **attrs = info->attrs;
2318 struct net_device *dev;
2319 struct macsec_secy *secy;
2320 struct macsec_tx_sc *tx_sc;
2321 struct macsec_tx_sa *tx_sa;
2323 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2324 bool was_operational, was_active;
2330 if (!attrs[MACSEC_ATTR_IFINDEX])
2333 if (parse_sa_config(attrs, tb_sa))
2336 if (!validate_upd_sa(tb_sa))
2340 tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa,
2341 &dev, &secy, &tx_sc, &assoc_num);
2342 if (IS_ERR(tx_sa)) {
2344 return PTR_ERR(tx_sa);
2347 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2350 pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
2351 if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
2352 pr_notice("macsec: nl: upd_txsa: bad pn length: %d != %d\n",
2353 nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
2358 spin_lock_bh(&tx_sa->lock);
2359 prev_pn = tx_sa->next_pn_halves;
2360 tx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
2361 spin_unlock_bh(&tx_sa->lock);
2364 was_active = tx_sa->active;
2365 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2366 tx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2368 was_operational = secy->operational;
2369 if (assoc_num == tx_sc->encoding_sa)
2370 secy->operational = tx_sa->active;
2372 /* If h/w offloading is available, propagate to the device */
2373 if (macsec_is_offloaded(netdev_priv(dev))) {
2374 const struct macsec_ops *ops;
2375 struct macsec_context ctx;
2377 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2383 ctx.sa.assoc_num = assoc_num;
2384 ctx.sa.tx_sa = tx_sa;
2387 ret = macsec_offload(ops->mdo_upd_txsa, &ctx);
2397 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2398 spin_lock_bh(&tx_sa->lock);
2399 tx_sa->next_pn_halves = prev_pn;
2400 spin_unlock_bh(&tx_sa->lock);
2402 tx_sa->active = was_active;
2403 secy->operational = was_operational;
2408 static int macsec_upd_rxsa(struct sk_buff *skb, struct genl_info *info)
2410 struct nlattr **attrs = info->attrs;
2411 struct net_device *dev;
2412 struct macsec_secy *secy;
2413 struct macsec_rx_sc *rx_sc;
2414 struct macsec_rx_sa *rx_sa;
2416 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2417 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2424 if (!attrs[MACSEC_ATTR_IFINDEX])
2427 if (parse_rxsc_config(attrs, tb_rxsc))
2430 if (parse_sa_config(attrs, tb_sa))
2433 if (!validate_upd_sa(tb_sa))
2437 rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa,
2438 &dev, &secy, &rx_sc, &assoc_num);
2439 if (IS_ERR(rx_sa)) {
2441 return PTR_ERR(rx_sa);
2444 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2447 pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
2448 if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
2449 pr_notice("macsec: nl: upd_rxsa: bad pn length: %d != %d\n",
2450 nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
2455 spin_lock_bh(&rx_sa->lock);
2456 prev_pn = rx_sa->next_pn_halves;
2457 rx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
2458 spin_unlock_bh(&rx_sa->lock);
2461 was_active = rx_sa->active;
2462 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2463 rx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2465 /* If h/w offloading is available, propagate to the device */
2466 if (macsec_is_offloaded(netdev_priv(dev))) {
2467 const struct macsec_ops *ops;
2468 struct macsec_context ctx;
2470 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2476 ctx.sa.assoc_num = assoc_num;
2477 ctx.sa.rx_sa = rx_sa;
2480 ret = macsec_offload(ops->mdo_upd_rxsa, &ctx);
2489 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2490 spin_lock_bh(&rx_sa->lock);
2491 rx_sa->next_pn_halves = prev_pn;
2492 spin_unlock_bh(&rx_sa->lock);
2494 rx_sa->active = was_active;
2499 static int macsec_upd_rxsc(struct sk_buff *skb, struct genl_info *info)
2501 struct nlattr **attrs = info->attrs;
2502 struct net_device *dev;
2503 struct macsec_secy *secy;
2504 struct macsec_rx_sc *rx_sc;
2505 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2506 unsigned int prev_n_rx_sc;
2510 if (!attrs[MACSEC_ATTR_IFINDEX])
2513 if (parse_rxsc_config(attrs, tb_rxsc))
2516 if (!validate_add_rxsc(tb_rxsc))
2520 rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy);
2521 if (IS_ERR(rx_sc)) {
2523 return PTR_ERR(rx_sc);
2526 was_active = rx_sc->active;
2527 prev_n_rx_sc = secy->n_rx_sc;
2528 if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]) {
2529 bool new = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]);
2531 if (rx_sc->active != new)
2532 secy->n_rx_sc += new ? 1 : -1;
2534 rx_sc->active = new;
2537 /* If h/w offloading is available, propagate to the device */
2538 if (macsec_is_offloaded(netdev_priv(dev))) {
2539 const struct macsec_ops *ops;
2540 struct macsec_context ctx;
2542 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2551 ret = macsec_offload(ops->mdo_upd_rxsc, &ctx);
2561 secy->n_rx_sc = prev_n_rx_sc;
2562 rx_sc->active = was_active;
2567 static bool macsec_is_configured(struct macsec_dev *macsec)
2569 struct macsec_secy *secy = &macsec->secy;
2570 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
2573 if (secy->n_rx_sc > 0)
2576 for (i = 0; i < MACSEC_NUM_AN; i++)
2583 static int macsec_upd_offload(struct sk_buff *skb, struct genl_info *info)
2585 struct nlattr *tb_offload[MACSEC_OFFLOAD_ATTR_MAX + 1];
2586 enum macsec_offload offload, prev_offload;
2587 int (*func)(struct macsec_context *ctx);
2588 struct nlattr **attrs = info->attrs;
2589 struct net_device *dev;
2590 const struct macsec_ops *ops;
2591 struct macsec_context ctx;
2592 struct macsec_dev *macsec;
2595 if (!attrs[MACSEC_ATTR_IFINDEX])
2598 if (!attrs[MACSEC_ATTR_OFFLOAD])
2601 if (nla_parse_nested_deprecated(tb_offload, MACSEC_OFFLOAD_ATTR_MAX,
2602 attrs[MACSEC_ATTR_OFFLOAD],
2603 macsec_genl_offload_policy, NULL))
2606 dev = get_dev_from_nl(genl_info_net(info), attrs);
2608 return PTR_ERR(dev);
2609 macsec = macsec_priv(dev);
2611 if (!tb_offload[MACSEC_OFFLOAD_ATTR_TYPE])
2614 offload = nla_get_u8(tb_offload[MACSEC_OFFLOAD_ATTR_TYPE]);
2615 if (macsec->offload == offload)
2618 /* Check if the offloading mode is supported by the underlying layers */
2619 if (offload != MACSEC_OFFLOAD_OFF &&
2620 !macsec_check_offload(offload, macsec))
2623 /* Check if the net device is busy. */
2624 if (netif_running(dev))
2629 prev_offload = macsec->offload;
2630 macsec->offload = offload;
2632 /* Check if the device already has rules configured: we do not support
2635 if (macsec_is_configured(macsec)) {
2640 ops = __macsec_get_ops(offload == MACSEC_OFFLOAD_OFF ? prev_offload : offload,
2647 if (prev_offload == MACSEC_OFFLOAD_OFF)
2648 func = ops->mdo_add_secy;
2650 func = ops->mdo_del_secy;
2652 ctx.secy = &macsec->secy;
2653 ret = macsec_offload(func, &ctx);
2657 /* Force features update, since they are different for SW MACSec and
2658 * HW offloading cases.
2660 netdev_update_features(dev);
2666 macsec->offload = prev_offload;
2672 static void get_tx_sa_stats(struct net_device *dev, int an,
2673 struct macsec_tx_sa *tx_sa,
2674 struct macsec_tx_sa_stats *sum)
2676 struct macsec_dev *macsec = macsec_priv(dev);
2679 /* If h/w offloading is available, propagate to the device */
2680 if (macsec_is_offloaded(macsec)) {
2681 const struct macsec_ops *ops;
2682 struct macsec_context ctx;
2684 ops = macsec_get_ops(macsec, &ctx);
2686 ctx.sa.assoc_num = an;
2687 ctx.sa.tx_sa = tx_sa;
2688 ctx.stats.tx_sa_stats = sum;
2689 ctx.secy = &macsec_priv(dev)->secy;
2690 macsec_offload(ops->mdo_get_tx_sa_stats, &ctx);
2695 for_each_possible_cpu(cpu) {
2696 const struct macsec_tx_sa_stats *stats =
2697 per_cpu_ptr(tx_sa->stats, cpu);
2699 sum->OutPktsProtected += stats->OutPktsProtected;
2700 sum->OutPktsEncrypted += stats->OutPktsEncrypted;
2704 static int copy_tx_sa_stats(struct sk_buff *skb, struct macsec_tx_sa_stats *sum)
2706 if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_PROTECTED,
2707 sum->OutPktsProtected) ||
2708 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_ENCRYPTED,
2709 sum->OutPktsEncrypted))
2715 static void get_rx_sa_stats(struct net_device *dev,
2716 struct macsec_rx_sc *rx_sc, int an,
2717 struct macsec_rx_sa *rx_sa,
2718 struct macsec_rx_sa_stats *sum)
2720 struct macsec_dev *macsec = macsec_priv(dev);
2723 /* If h/w offloading is available, propagate to the device */
2724 if (macsec_is_offloaded(macsec)) {
2725 const struct macsec_ops *ops;
2726 struct macsec_context ctx;
2728 ops = macsec_get_ops(macsec, &ctx);
2730 ctx.sa.assoc_num = an;
2731 ctx.sa.rx_sa = rx_sa;
2732 ctx.stats.rx_sa_stats = sum;
2733 ctx.secy = &macsec_priv(dev)->secy;
2735 macsec_offload(ops->mdo_get_rx_sa_stats, &ctx);
2740 for_each_possible_cpu(cpu) {
2741 const struct macsec_rx_sa_stats *stats =
2742 per_cpu_ptr(rx_sa->stats, cpu);
2744 sum->InPktsOK += stats->InPktsOK;
2745 sum->InPktsInvalid += stats->InPktsInvalid;
2746 sum->InPktsNotValid += stats->InPktsNotValid;
2747 sum->InPktsNotUsingSA += stats->InPktsNotUsingSA;
2748 sum->InPktsUnusedSA += stats->InPktsUnusedSA;
2752 static int copy_rx_sa_stats(struct sk_buff *skb,
2753 struct macsec_rx_sa_stats *sum)
2755 if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_OK, sum->InPktsOK) ||
2756 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_INVALID,
2757 sum->InPktsInvalid) ||
2758 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_VALID,
2759 sum->InPktsNotValid) ||
2760 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_USING_SA,
2761 sum->InPktsNotUsingSA) ||
2762 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_UNUSED_SA,
2763 sum->InPktsUnusedSA))
2769 static void get_rx_sc_stats(struct net_device *dev,
2770 struct macsec_rx_sc *rx_sc,
2771 struct macsec_rx_sc_stats *sum)
2773 struct macsec_dev *macsec = macsec_priv(dev);
2776 /* If h/w offloading is available, propagate to the device */
2777 if (macsec_is_offloaded(macsec)) {
2778 const struct macsec_ops *ops;
2779 struct macsec_context ctx;
2781 ops = macsec_get_ops(macsec, &ctx);
2783 ctx.stats.rx_sc_stats = sum;
2784 ctx.secy = &macsec_priv(dev)->secy;
2786 macsec_offload(ops->mdo_get_rx_sc_stats, &ctx);
2791 for_each_possible_cpu(cpu) {
2792 const struct pcpu_rx_sc_stats *stats;
2793 struct macsec_rx_sc_stats tmp;
2796 stats = per_cpu_ptr(rx_sc->stats, cpu);
2798 start = u64_stats_fetch_begin_irq(&stats->syncp);
2799 memcpy(&tmp, &stats->stats, sizeof(tmp));
2800 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2802 sum->InOctetsValidated += tmp.InOctetsValidated;
2803 sum->InOctetsDecrypted += tmp.InOctetsDecrypted;
2804 sum->InPktsUnchecked += tmp.InPktsUnchecked;
2805 sum->InPktsDelayed += tmp.InPktsDelayed;
2806 sum->InPktsOK += tmp.InPktsOK;
2807 sum->InPktsInvalid += tmp.InPktsInvalid;
2808 sum->InPktsLate += tmp.InPktsLate;
2809 sum->InPktsNotValid += tmp.InPktsNotValid;
2810 sum->InPktsNotUsingSA += tmp.InPktsNotUsingSA;
2811 sum->InPktsUnusedSA += tmp.InPktsUnusedSA;
2815 static int copy_rx_sc_stats(struct sk_buff *skb, struct macsec_rx_sc_stats *sum)
2817 if (nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_VALIDATED,
2818 sum->InOctetsValidated,
2819 MACSEC_RXSC_STATS_ATTR_PAD) ||
2820 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_DECRYPTED,
2821 sum->InOctetsDecrypted,
2822 MACSEC_RXSC_STATS_ATTR_PAD) ||
2823 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNCHECKED,
2824 sum->InPktsUnchecked,
2825 MACSEC_RXSC_STATS_ATTR_PAD) ||
2826 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_DELAYED,
2828 MACSEC_RXSC_STATS_ATTR_PAD) ||
2829 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_OK,
2831 MACSEC_RXSC_STATS_ATTR_PAD) ||
2832 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_INVALID,
2834 MACSEC_RXSC_STATS_ATTR_PAD) ||
2835 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_LATE,
2837 MACSEC_RXSC_STATS_ATTR_PAD) ||
2838 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_VALID,
2839 sum->InPktsNotValid,
2840 MACSEC_RXSC_STATS_ATTR_PAD) ||
2841 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_USING_SA,
2842 sum->InPktsNotUsingSA,
2843 MACSEC_RXSC_STATS_ATTR_PAD) ||
2844 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNUSED_SA,
2845 sum->InPktsUnusedSA,
2846 MACSEC_RXSC_STATS_ATTR_PAD))
2852 static void get_tx_sc_stats(struct net_device *dev,
2853 struct macsec_tx_sc_stats *sum)
2855 struct macsec_dev *macsec = macsec_priv(dev);
2858 /* If h/w offloading is available, propagate to the device */
2859 if (macsec_is_offloaded(macsec)) {
2860 const struct macsec_ops *ops;
2861 struct macsec_context ctx;
2863 ops = macsec_get_ops(macsec, &ctx);
2865 ctx.stats.tx_sc_stats = sum;
2866 ctx.secy = &macsec_priv(dev)->secy;
2867 macsec_offload(ops->mdo_get_tx_sc_stats, &ctx);
2872 for_each_possible_cpu(cpu) {
2873 const struct pcpu_tx_sc_stats *stats;
2874 struct macsec_tx_sc_stats tmp;
2877 stats = per_cpu_ptr(macsec_priv(dev)->secy.tx_sc.stats, cpu);
2879 start = u64_stats_fetch_begin_irq(&stats->syncp);
2880 memcpy(&tmp, &stats->stats, sizeof(tmp));
2881 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2883 sum->OutPktsProtected += tmp.OutPktsProtected;
2884 sum->OutPktsEncrypted += tmp.OutPktsEncrypted;
2885 sum->OutOctetsProtected += tmp.OutOctetsProtected;
2886 sum->OutOctetsEncrypted += tmp.OutOctetsEncrypted;
2890 static int copy_tx_sc_stats(struct sk_buff *skb, struct macsec_tx_sc_stats *sum)
2892 if (nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_PROTECTED,
2893 sum->OutPktsProtected,
2894 MACSEC_TXSC_STATS_ATTR_PAD) ||
2895 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_ENCRYPTED,
2896 sum->OutPktsEncrypted,
2897 MACSEC_TXSC_STATS_ATTR_PAD) ||
2898 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_PROTECTED,
2899 sum->OutOctetsProtected,
2900 MACSEC_TXSC_STATS_ATTR_PAD) ||
2901 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_ENCRYPTED,
2902 sum->OutOctetsEncrypted,
2903 MACSEC_TXSC_STATS_ATTR_PAD))
2909 static void get_secy_stats(struct net_device *dev, struct macsec_dev_stats *sum)
2911 struct macsec_dev *macsec = macsec_priv(dev);
2914 /* If h/w offloading is available, propagate to the device */
2915 if (macsec_is_offloaded(macsec)) {
2916 const struct macsec_ops *ops;
2917 struct macsec_context ctx;
2919 ops = macsec_get_ops(macsec, &ctx);
2921 ctx.stats.dev_stats = sum;
2922 ctx.secy = &macsec_priv(dev)->secy;
2923 macsec_offload(ops->mdo_get_dev_stats, &ctx);
2928 for_each_possible_cpu(cpu) {
2929 const struct pcpu_secy_stats *stats;
2930 struct macsec_dev_stats tmp;
2933 stats = per_cpu_ptr(macsec_priv(dev)->stats, cpu);
2935 start = u64_stats_fetch_begin_irq(&stats->syncp);
2936 memcpy(&tmp, &stats->stats, sizeof(tmp));
2937 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2939 sum->OutPktsUntagged += tmp.OutPktsUntagged;
2940 sum->InPktsUntagged += tmp.InPktsUntagged;
2941 sum->OutPktsTooLong += tmp.OutPktsTooLong;
2942 sum->InPktsNoTag += tmp.InPktsNoTag;
2943 sum->InPktsBadTag += tmp.InPktsBadTag;
2944 sum->InPktsUnknownSCI += tmp.InPktsUnknownSCI;
2945 sum->InPktsNoSCI += tmp.InPktsNoSCI;
2946 sum->InPktsOverrun += tmp.InPktsOverrun;
2950 static int copy_secy_stats(struct sk_buff *skb, struct macsec_dev_stats *sum)
2952 if (nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_UNTAGGED,
2953 sum->OutPktsUntagged,
2954 MACSEC_SECY_STATS_ATTR_PAD) ||
2955 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNTAGGED,
2956 sum->InPktsUntagged,
2957 MACSEC_SECY_STATS_ATTR_PAD) ||
2958 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_TOO_LONG,
2959 sum->OutPktsTooLong,
2960 MACSEC_SECY_STATS_ATTR_PAD) ||
2961 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_TAG,
2963 MACSEC_SECY_STATS_ATTR_PAD) ||
2964 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_BAD_TAG,
2966 MACSEC_SECY_STATS_ATTR_PAD) ||
2967 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNKNOWN_SCI,
2968 sum->InPktsUnknownSCI,
2969 MACSEC_SECY_STATS_ATTR_PAD) ||
2970 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_SCI,
2972 MACSEC_SECY_STATS_ATTR_PAD) ||
2973 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_OVERRUN,
2975 MACSEC_SECY_STATS_ATTR_PAD))
2981 static int nla_put_secy(struct macsec_secy *secy, struct sk_buff *skb)
2983 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
2984 struct nlattr *secy_nest = nla_nest_start_noflag(skb,
2991 switch (secy->key_len) {
2992 case MACSEC_GCM_AES_128_SAK_LEN:
2993 csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_128 : MACSEC_DEFAULT_CIPHER_ID;
2995 case MACSEC_GCM_AES_256_SAK_LEN:
2996 csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_256 : MACSEC_CIPHER_ID_GCM_AES_256;
3002 if (nla_put_sci(skb, MACSEC_SECY_ATTR_SCI, secy->sci,
3003 MACSEC_SECY_ATTR_PAD) ||
3004 nla_put_u64_64bit(skb, MACSEC_SECY_ATTR_CIPHER_SUITE,
3005 csid, MACSEC_SECY_ATTR_PAD) ||
3006 nla_put_u8(skb, MACSEC_SECY_ATTR_ICV_LEN, secy->icv_len) ||
3007 nla_put_u8(skb, MACSEC_SECY_ATTR_OPER, secy->operational) ||
3008 nla_put_u8(skb, MACSEC_SECY_ATTR_PROTECT, secy->protect_frames) ||
3009 nla_put_u8(skb, MACSEC_SECY_ATTR_REPLAY, secy->replay_protect) ||
3010 nla_put_u8(skb, MACSEC_SECY_ATTR_VALIDATE, secy->validate_frames) ||
3011 nla_put_u8(skb, MACSEC_SECY_ATTR_ENCRYPT, tx_sc->encrypt) ||
3012 nla_put_u8(skb, MACSEC_SECY_ATTR_INC_SCI, tx_sc->send_sci) ||
3013 nla_put_u8(skb, MACSEC_SECY_ATTR_ES, tx_sc->end_station) ||
3014 nla_put_u8(skb, MACSEC_SECY_ATTR_SCB, tx_sc->scb) ||
3015 nla_put_u8(skb, MACSEC_SECY_ATTR_ENCODING_SA, tx_sc->encoding_sa))
3018 if (secy->replay_protect) {
3019 if (nla_put_u32(skb, MACSEC_SECY_ATTR_WINDOW, secy->replay_window))
3023 nla_nest_end(skb, secy_nest);
3027 nla_nest_cancel(skb, secy_nest);
3031 static noinline_for_stack int
3032 dump_secy(struct macsec_secy *secy, struct net_device *dev,
3033 struct sk_buff *skb, struct netlink_callback *cb)
3035 struct macsec_tx_sc_stats tx_sc_stats = {0, };
3036 struct macsec_tx_sa_stats tx_sa_stats = {0, };
3037 struct macsec_rx_sc_stats rx_sc_stats = {0, };
3038 struct macsec_rx_sa_stats rx_sa_stats = {0, };
3039 struct macsec_dev *macsec = netdev_priv(dev);
3040 struct macsec_dev_stats dev_stats = {0, };
3041 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
3042 struct nlattr *txsa_list, *rxsc_list;
3043 struct macsec_rx_sc *rx_sc;
3044 struct nlattr *attr;
3048 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
3049 &macsec_fam, NLM_F_MULTI, MACSEC_CMD_GET_TXSC);
3053 genl_dump_check_consistent(cb, hdr);
3055 if (nla_put_u32(skb, MACSEC_ATTR_IFINDEX, dev->ifindex))
3056 goto nla_put_failure;
3058 attr = nla_nest_start_noflag(skb, MACSEC_ATTR_OFFLOAD);
3060 goto nla_put_failure;
3061 if (nla_put_u8(skb, MACSEC_OFFLOAD_ATTR_TYPE, macsec->offload))
3062 goto nla_put_failure;
3063 nla_nest_end(skb, attr);
3065 if (nla_put_secy(secy, skb))
3066 goto nla_put_failure;
3068 attr = nla_nest_start_noflag(skb, MACSEC_ATTR_TXSC_STATS);
3070 goto nla_put_failure;
3072 get_tx_sc_stats(dev, &tx_sc_stats);
3073 if (copy_tx_sc_stats(skb, &tx_sc_stats)) {
3074 nla_nest_cancel(skb, attr);
3075 goto nla_put_failure;
3077 nla_nest_end(skb, attr);
3079 attr = nla_nest_start_noflag(skb, MACSEC_ATTR_SECY_STATS);
3081 goto nla_put_failure;
3082 get_secy_stats(dev, &dev_stats);
3083 if (copy_secy_stats(skb, &dev_stats)) {
3084 nla_nest_cancel(skb, attr);
3085 goto nla_put_failure;
3087 nla_nest_end(skb, attr);
3089 txsa_list = nla_nest_start_noflag(skb, MACSEC_ATTR_TXSA_LIST);
3091 goto nla_put_failure;
3092 for (i = 0, j = 1; i < MACSEC_NUM_AN; i++) {
3093 struct macsec_tx_sa *tx_sa = rtnl_dereference(tx_sc->sa[i]);
3094 struct nlattr *txsa_nest;
3101 txsa_nest = nla_nest_start_noflag(skb, j++);
3103 nla_nest_cancel(skb, txsa_list);
3104 goto nla_put_failure;
3107 attr = nla_nest_start_noflag(skb, MACSEC_SA_ATTR_STATS);
3109 nla_nest_cancel(skb, txsa_nest);
3110 nla_nest_cancel(skb, txsa_list);
3111 goto nla_put_failure;
3113 memset(&tx_sa_stats, 0, sizeof(tx_sa_stats));
3114 get_tx_sa_stats(dev, i, tx_sa, &tx_sa_stats);
3115 if (copy_tx_sa_stats(skb, &tx_sa_stats)) {
3116 nla_nest_cancel(skb, attr);
3117 nla_nest_cancel(skb, txsa_nest);
3118 nla_nest_cancel(skb, txsa_list);
3119 goto nla_put_failure;
3121 nla_nest_end(skb, attr);
3124 pn = tx_sa->next_pn;
3125 pn_len = MACSEC_XPN_PN_LEN;
3127 pn = tx_sa->next_pn_halves.lower;
3128 pn_len = MACSEC_DEFAULT_PN_LEN;
3131 if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) ||
3132 nla_put(skb, MACSEC_SA_ATTR_PN, pn_len, &pn) ||
3133 nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, tx_sa->key.id) ||
3134 (secy->xpn && nla_put_ssci(skb, MACSEC_SA_ATTR_SSCI, tx_sa->ssci)) ||
3135 nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, tx_sa->active)) {
3136 nla_nest_cancel(skb, txsa_nest);
3137 nla_nest_cancel(skb, txsa_list);
3138 goto nla_put_failure;
3141 nla_nest_end(skb, txsa_nest);
3143 nla_nest_end(skb, txsa_list);
3145 rxsc_list = nla_nest_start_noflag(skb, MACSEC_ATTR_RXSC_LIST);
3147 goto nla_put_failure;
3150 for_each_rxsc_rtnl(secy, rx_sc) {
3152 struct nlattr *rxsa_list;
3153 struct nlattr *rxsc_nest = nla_nest_start_noflag(skb, j++);
3156 nla_nest_cancel(skb, rxsc_list);
3157 goto nla_put_failure;
3160 if (nla_put_u8(skb, MACSEC_RXSC_ATTR_ACTIVE, rx_sc->active) ||
3161 nla_put_sci(skb, MACSEC_RXSC_ATTR_SCI, rx_sc->sci,
3162 MACSEC_RXSC_ATTR_PAD)) {
3163 nla_nest_cancel(skb, rxsc_nest);
3164 nla_nest_cancel(skb, rxsc_list);
3165 goto nla_put_failure;
3168 attr = nla_nest_start_noflag(skb, MACSEC_RXSC_ATTR_STATS);
3170 nla_nest_cancel(skb, rxsc_nest);
3171 nla_nest_cancel(skb, rxsc_list);
3172 goto nla_put_failure;
3174 memset(&rx_sc_stats, 0, sizeof(rx_sc_stats));
3175 get_rx_sc_stats(dev, rx_sc, &rx_sc_stats);
3176 if (copy_rx_sc_stats(skb, &rx_sc_stats)) {
3177 nla_nest_cancel(skb, attr);
3178 nla_nest_cancel(skb, rxsc_nest);
3179 nla_nest_cancel(skb, rxsc_list);
3180 goto nla_put_failure;
3182 nla_nest_end(skb, attr);
3184 rxsa_list = nla_nest_start_noflag(skb,
3185 MACSEC_RXSC_ATTR_SA_LIST);
3187 nla_nest_cancel(skb, rxsc_nest);
3188 nla_nest_cancel(skb, rxsc_list);
3189 goto nla_put_failure;
3192 for (i = 0, k = 1; i < MACSEC_NUM_AN; i++) {
3193 struct macsec_rx_sa *rx_sa = rtnl_dereference(rx_sc->sa[i]);
3194 struct nlattr *rxsa_nest;
3201 rxsa_nest = nla_nest_start_noflag(skb, k++);
3203 nla_nest_cancel(skb, rxsa_list);
3204 nla_nest_cancel(skb, rxsc_nest);
3205 nla_nest_cancel(skb, rxsc_list);
3206 goto nla_put_failure;
3209 attr = nla_nest_start_noflag(skb,
3210 MACSEC_SA_ATTR_STATS);
3212 nla_nest_cancel(skb, rxsa_list);
3213 nla_nest_cancel(skb, rxsc_nest);
3214 nla_nest_cancel(skb, rxsc_list);
3215 goto nla_put_failure;
3217 memset(&rx_sa_stats, 0, sizeof(rx_sa_stats));
3218 get_rx_sa_stats(dev, rx_sc, i, rx_sa, &rx_sa_stats);
3219 if (copy_rx_sa_stats(skb, &rx_sa_stats)) {
3220 nla_nest_cancel(skb, attr);
3221 nla_nest_cancel(skb, rxsa_list);
3222 nla_nest_cancel(skb, rxsc_nest);
3223 nla_nest_cancel(skb, rxsc_list);
3224 goto nla_put_failure;
3226 nla_nest_end(skb, attr);
3229 pn = rx_sa->next_pn;
3230 pn_len = MACSEC_XPN_PN_LEN;
3232 pn = rx_sa->next_pn_halves.lower;
3233 pn_len = MACSEC_DEFAULT_PN_LEN;
3236 if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) ||
3237 nla_put(skb, MACSEC_SA_ATTR_PN, pn_len, &pn) ||
3238 nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, rx_sa->key.id) ||
3239 (secy->xpn && nla_put_ssci(skb, MACSEC_SA_ATTR_SSCI, rx_sa->ssci)) ||
3240 nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, rx_sa->active)) {
3241 nla_nest_cancel(skb, rxsa_nest);
3242 nla_nest_cancel(skb, rxsc_nest);
3243 nla_nest_cancel(skb, rxsc_list);
3244 goto nla_put_failure;
3246 nla_nest_end(skb, rxsa_nest);
3249 nla_nest_end(skb, rxsa_list);
3250 nla_nest_end(skb, rxsc_nest);
3253 nla_nest_end(skb, rxsc_list);
3255 genlmsg_end(skb, hdr);
3260 genlmsg_cancel(skb, hdr);
3264 static int macsec_generation = 1; /* protected by RTNL */
3266 static int macsec_dump_txsc(struct sk_buff *skb, struct netlink_callback *cb)
3268 struct net *net = sock_net(skb->sk);
3269 struct net_device *dev;
3272 dev_idx = cb->args[0];
3277 cb->seq = macsec_generation;
3279 for_each_netdev(net, dev) {
3280 struct macsec_secy *secy;
3285 if (!netif_is_macsec(dev))
3288 secy = &macsec_priv(dev)->secy;
3289 if (dump_secy(secy, dev, skb, cb) < 0)
3301 static const struct genl_small_ops macsec_genl_ops[] = {
3303 .cmd = MACSEC_CMD_GET_TXSC,
3304 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3305 .dumpit = macsec_dump_txsc,
3308 .cmd = MACSEC_CMD_ADD_RXSC,
3309 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3310 .doit = macsec_add_rxsc,
3311 .flags = GENL_ADMIN_PERM,
3314 .cmd = MACSEC_CMD_DEL_RXSC,
3315 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3316 .doit = macsec_del_rxsc,
3317 .flags = GENL_ADMIN_PERM,
3320 .cmd = MACSEC_CMD_UPD_RXSC,
3321 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3322 .doit = macsec_upd_rxsc,
3323 .flags = GENL_ADMIN_PERM,
3326 .cmd = MACSEC_CMD_ADD_TXSA,
3327 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3328 .doit = macsec_add_txsa,
3329 .flags = GENL_ADMIN_PERM,
3332 .cmd = MACSEC_CMD_DEL_TXSA,
3333 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3334 .doit = macsec_del_txsa,
3335 .flags = GENL_ADMIN_PERM,
3338 .cmd = MACSEC_CMD_UPD_TXSA,
3339 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3340 .doit = macsec_upd_txsa,
3341 .flags = GENL_ADMIN_PERM,
3344 .cmd = MACSEC_CMD_ADD_RXSA,
3345 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3346 .doit = macsec_add_rxsa,
3347 .flags = GENL_ADMIN_PERM,
3350 .cmd = MACSEC_CMD_DEL_RXSA,
3351 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3352 .doit = macsec_del_rxsa,
3353 .flags = GENL_ADMIN_PERM,
3356 .cmd = MACSEC_CMD_UPD_RXSA,
3357 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3358 .doit = macsec_upd_rxsa,
3359 .flags = GENL_ADMIN_PERM,
3362 .cmd = MACSEC_CMD_UPD_OFFLOAD,
3363 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3364 .doit = macsec_upd_offload,
3365 .flags = GENL_ADMIN_PERM,
3369 static struct genl_family macsec_fam __ro_after_init = {
3370 .name = MACSEC_GENL_NAME,
3372 .version = MACSEC_GENL_VERSION,
3373 .maxattr = MACSEC_ATTR_MAX,
3374 .policy = macsec_genl_policy,
3376 .module = THIS_MODULE,
3377 .small_ops = macsec_genl_ops,
3378 .n_small_ops = ARRAY_SIZE(macsec_genl_ops),
3379 .resv_start_op = MACSEC_CMD_UPD_OFFLOAD + 1,
3382 static netdev_tx_t macsec_start_xmit(struct sk_buff *skb,
3383 struct net_device *dev)
3385 struct macsec_dev *macsec = netdev_priv(dev);
3386 struct macsec_secy *secy = &macsec->secy;
3387 struct pcpu_secy_stats *secy_stats;
3390 if (macsec_is_offloaded(netdev_priv(dev))) {
3391 struct metadata_dst *md_dst = secy->tx_sc.md_dst;
3394 dst_hold(&md_dst->dst);
3395 skb_dst_set(skb, &md_dst->dst);
3396 skb->dev = macsec->real_dev;
3397 return dev_queue_xmit(skb);
3401 if (!secy->protect_frames) {
3402 secy_stats = this_cpu_ptr(macsec->stats);
3403 u64_stats_update_begin(&secy_stats->syncp);
3404 secy_stats->stats.OutPktsUntagged++;
3405 u64_stats_update_end(&secy_stats->syncp);
3406 skb->dev = macsec->real_dev;
3408 ret = dev_queue_xmit(skb);
3409 count_tx(dev, ret, len);
3413 if (!secy->operational) {
3415 dev->stats.tx_dropped++;
3416 return NETDEV_TX_OK;
3420 skb = macsec_encrypt(skb, dev);
3422 if (PTR_ERR(skb) != -EINPROGRESS)
3423 dev->stats.tx_dropped++;
3424 return NETDEV_TX_OK;
3427 macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa);
3429 macsec_encrypt_finish(skb, dev);
3430 ret = dev_queue_xmit(skb);
3431 count_tx(dev, ret, len);
3435 #define SW_MACSEC_FEATURES \
3436 (NETIF_F_SG | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST)
3438 /* If h/w offloading is enabled, use real device features save for
3439 * VLAN_FEATURES - they require additional ops
3440 * HW_MACSEC - no reason to report it
3442 #define REAL_DEV_FEATURES(dev) \
3443 ((dev)->features & ~(NETIF_F_VLAN_FEATURES | NETIF_F_HW_MACSEC))
3445 static int macsec_dev_init(struct net_device *dev)
3447 struct macsec_dev *macsec = macsec_priv(dev);
3448 struct net_device *real_dev = macsec->real_dev;
3451 dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
3455 err = gro_cells_init(&macsec->gro_cells, dev);
3457 free_percpu(dev->tstats);
3461 if (macsec_is_offloaded(macsec)) {
3462 dev->features = REAL_DEV_FEATURES(real_dev);
3464 dev->features = real_dev->features & SW_MACSEC_FEATURES;
3465 dev->features |= NETIF_F_LLTX | NETIF_F_GSO_SOFTWARE;
3468 dev->needed_headroom = real_dev->needed_headroom +
3469 MACSEC_NEEDED_HEADROOM;
3470 dev->needed_tailroom = real_dev->needed_tailroom +
3471 MACSEC_NEEDED_TAILROOM;
3473 if (is_zero_ether_addr(dev->dev_addr))
3474 eth_hw_addr_inherit(dev, real_dev);
3475 if (is_zero_ether_addr(dev->broadcast))
3476 memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len);
3478 /* Get macsec's reference to real_dev */
3479 netdev_hold(real_dev, &macsec->dev_tracker, GFP_KERNEL);
3484 static void macsec_dev_uninit(struct net_device *dev)
3486 struct macsec_dev *macsec = macsec_priv(dev);
3488 gro_cells_destroy(&macsec->gro_cells);
3489 free_percpu(dev->tstats);
3492 static netdev_features_t macsec_fix_features(struct net_device *dev,
3493 netdev_features_t features)
3495 struct macsec_dev *macsec = macsec_priv(dev);
3496 struct net_device *real_dev = macsec->real_dev;
3498 if (macsec_is_offloaded(macsec))
3499 return REAL_DEV_FEATURES(real_dev);
3501 features &= (real_dev->features & SW_MACSEC_FEATURES) |
3502 NETIF_F_GSO_SOFTWARE | NETIF_F_SOFT_FEATURES;
3503 features |= NETIF_F_LLTX;
3508 static int macsec_dev_open(struct net_device *dev)
3510 struct macsec_dev *macsec = macsec_priv(dev);
3511 struct net_device *real_dev = macsec->real_dev;
3514 err = dev_uc_add(real_dev, dev->dev_addr);
3518 if (dev->flags & IFF_ALLMULTI) {
3519 err = dev_set_allmulti(real_dev, 1);
3524 if (dev->flags & IFF_PROMISC) {
3525 err = dev_set_promiscuity(real_dev, 1);
3527 goto clear_allmulti;
3530 /* If h/w offloading is available, propagate to the device */
3531 if (macsec_is_offloaded(macsec)) {
3532 const struct macsec_ops *ops;
3533 struct macsec_context ctx;
3535 ops = macsec_get_ops(netdev_priv(dev), &ctx);
3538 goto clear_allmulti;
3541 ctx.secy = &macsec->secy;
3542 err = macsec_offload(ops->mdo_dev_open, &ctx);
3544 goto clear_allmulti;
3547 if (netif_carrier_ok(real_dev))
3548 netif_carrier_on(dev);
3552 if (dev->flags & IFF_ALLMULTI)
3553 dev_set_allmulti(real_dev, -1);
3555 dev_uc_del(real_dev, dev->dev_addr);
3556 netif_carrier_off(dev);
3560 static int macsec_dev_stop(struct net_device *dev)
3562 struct macsec_dev *macsec = macsec_priv(dev);
3563 struct net_device *real_dev = macsec->real_dev;
3565 netif_carrier_off(dev);
3567 /* If h/w offloading is available, propagate to the device */
3568 if (macsec_is_offloaded(macsec)) {
3569 const struct macsec_ops *ops;
3570 struct macsec_context ctx;
3572 ops = macsec_get_ops(macsec, &ctx);
3574 ctx.secy = &macsec->secy;
3575 macsec_offload(ops->mdo_dev_stop, &ctx);
3579 dev_mc_unsync(real_dev, dev);
3580 dev_uc_unsync(real_dev, dev);
3582 if (dev->flags & IFF_ALLMULTI)
3583 dev_set_allmulti(real_dev, -1);
3585 if (dev->flags & IFF_PROMISC)
3586 dev_set_promiscuity(real_dev, -1);
3588 dev_uc_del(real_dev, dev->dev_addr);
3593 static void macsec_dev_change_rx_flags(struct net_device *dev, int change)
3595 struct net_device *real_dev = macsec_priv(dev)->real_dev;
3597 if (!(dev->flags & IFF_UP))
3600 if (change & IFF_ALLMULTI)
3601 dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1);
3603 if (change & IFF_PROMISC)
3604 dev_set_promiscuity(real_dev,
3605 dev->flags & IFF_PROMISC ? 1 : -1);
3608 static void macsec_dev_set_rx_mode(struct net_device *dev)
3610 struct net_device *real_dev = macsec_priv(dev)->real_dev;
3612 dev_mc_sync(real_dev, dev);
3613 dev_uc_sync(real_dev, dev);
3616 static int macsec_set_mac_address(struct net_device *dev, void *p)
3618 struct macsec_dev *macsec = macsec_priv(dev);
3619 struct net_device *real_dev = macsec->real_dev;
3620 struct sockaddr *addr = p;
3623 if (!is_valid_ether_addr(addr->sa_data))
3624 return -EADDRNOTAVAIL;
3626 if (!(dev->flags & IFF_UP))
3629 err = dev_uc_add(real_dev, addr->sa_data);
3633 dev_uc_del(real_dev, dev->dev_addr);
3636 eth_hw_addr_set(dev, addr->sa_data);
3638 /* If h/w offloading is available, propagate to the device */
3639 if (macsec_is_offloaded(macsec)) {
3640 const struct macsec_ops *ops;
3641 struct macsec_context ctx;
3643 ops = macsec_get_ops(macsec, &ctx);
3645 ctx.secy = &macsec->secy;
3646 macsec_offload(ops->mdo_upd_secy, &ctx);
3653 static int macsec_change_mtu(struct net_device *dev, int new_mtu)
3655 struct macsec_dev *macsec = macsec_priv(dev);
3656 unsigned int extra = macsec->secy.icv_len + macsec_extra_len(true);
3658 if (macsec->real_dev->mtu - extra < new_mtu)
3666 static void macsec_get_stats64(struct net_device *dev,
3667 struct rtnl_link_stats64 *s)
3672 dev_fetch_sw_netstats(s, dev->tstats);
3674 s->rx_dropped = dev->stats.rx_dropped;
3675 s->tx_dropped = dev->stats.tx_dropped;
3676 s->rx_errors = dev->stats.rx_errors;
3679 static int macsec_get_iflink(const struct net_device *dev)
3681 return macsec_priv(dev)->real_dev->ifindex;
3684 static const struct net_device_ops macsec_netdev_ops = {
3685 .ndo_init = macsec_dev_init,
3686 .ndo_uninit = macsec_dev_uninit,
3687 .ndo_open = macsec_dev_open,
3688 .ndo_stop = macsec_dev_stop,
3689 .ndo_fix_features = macsec_fix_features,
3690 .ndo_change_mtu = macsec_change_mtu,
3691 .ndo_set_rx_mode = macsec_dev_set_rx_mode,
3692 .ndo_change_rx_flags = macsec_dev_change_rx_flags,
3693 .ndo_set_mac_address = macsec_set_mac_address,
3694 .ndo_start_xmit = macsec_start_xmit,
3695 .ndo_get_stats64 = macsec_get_stats64,
3696 .ndo_get_iflink = macsec_get_iflink,
3699 static const struct device_type macsec_type = {
3703 static const struct nla_policy macsec_rtnl_policy[IFLA_MACSEC_MAX + 1] = {
3704 [IFLA_MACSEC_SCI] = { .type = NLA_U64 },
3705 [IFLA_MACSEC_PORT] = { .type = NLA_U16 },
3706 [IFLA_MACSEC_ICV_LEN] = { .type = NLA_U8 },
3707 [IFLA_MACSEC_CIPHER_SUITE] = { .type = NLA_U64 },
3708 [IFLA_MACSEC_WINDOW] = { .type = NLA_U32 },
3709 [IFLA_MACSEC_ENCODING_SA] = { .type = NLA_U8 },
3710 [IFLA_MACSEC_ENCRYPT] = { .type = NLA_U8 },
3711 [IFLA_MACSEC_PROTECT] = { .type = NLA_U8 },
3712 [IFLA_MACSEC_INC_SCI] = { .type = NLA_U8 },
3713 [IFLA_MACSEC_ES] = { .type = NLA_U8 },
3714 [IFLA_MACSEC_SCB] = { .type = NLA_U8 },
3715 [IFLA_MACSEC_REPLAY_PROTECT] = { .type = NLA_U8 },
3716 [IFLA_MACSEC_VALIDATION] = { .type = NLA_U8 },
3719 static void macsec_free_netdev(struct net_device *dev)
3721 struct macsec_dev *macsec = macsec_priv(dev);
3723 if (macsec->secy.tx_sc.md_dst)
3724 metadata_dst_free(macsec->secy.tx_sc.md_dst);
3725 free_percpu(macsec->stats);
3726 free_percpu(macsec->secy.tx_sc.stats);
3728 /* Get rid of the macsec's reference to real_dev */
3729 netdev_put(macsec->real_dev, &macsec->dev_tracker);
3732 static void macsec_setup(struct net_device *dev)
3736 dev->max_mtu = ETH_MAX_MTU;
3737 dev->priv_flags |= IFF_NO_QUEUE;
3738 dev->netdev_ops = &macsec_netdev_ops;
3739 dev->needs_free_netdev = true;
3740 dev->priv_destructor = macsec_free_netdev;
3741 SET_NETDEV_DEVTYPE(dev, &macsec_type);
3743 eth_zero_addr(dev->broadcast);
3746 static int macsec_changelink_common(struct net_device *dev,
3747 struct nlattr *data[])
3749 struct macsec_secy *secy;
3750 struct macsec_tx_sc *tx_sc;
3752 secy = &macsec_priv(dev)->secy;
3753 tx_sc = &secy->tx_sc;
3755 if (data[IFLA_MACSEC_ENCODING_SA]) {
3756 struct macsec_tx_sa *tx_sa;
3758 tx_sc->encoding_sa = nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]);
3759 tx_sa = rtnl_dereference(tx_sc->sa[tx_sc->encoding_sa]);
3761 secy->operational = tx_sa && tx_sa->active;
3764 if (data[IFLA_MACSEC_ENCRYPT])
3765 tx_sc->encrypt = !!nla_get_u8(data[IFLA_MACSEC_ENCRYPT]);
3767 if (data[IFLA_MACSEC_PROTECT])
3768 secy->protect_frames = !!nla_get_u8(data[IFLA_MACSEC_PROTECT]);
3770 if (data[IFLA_MACSEC_INC_SCI])
3771 tx_sc->send_sci = !!nla_get_u8(data[IFLA_MACSEC_INC_SCI]);
3773 if (data[IFLA_MACSEC_ES])
3774 tx_sc->end_station = !!nla_get_u8(data[IFLA_MACSEC_ES]);
3776 if (data[IFLA_MACSEC_SCB])
3777 tx_sc->scb = !!nla_get_u8(data[IFLA_MACSEC_SCB]);
3779 if (data[IFLA_MACSEC_REPLAY_PROTECT])
3780 secy->replay_protect = !!nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT]);
3782 if (data[IFLA_MACSEC_VALIDATION])
3783 secy->validate_frames = nla_get_u8(data[IFLA_MACSEC_VALIDATION]);
3785 if (data[IFLA_MACSEC_CIPHER_SUITE]) {
3786 switch (nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE])) {
3787 case MACSEC_CIPHER_ID_GCM_AES_128:
3788 case MACSEC_DEFAULT_CIPHER_ID:
3789 secy->key_len = MACSEC_GCM_AES_128_SAK_LEN;
3792 case MACSEC_CIPHER_ID_GCM_AES_256:
3793 secy->key_len = MACSEC_GCM_AES_256_SAK_LEN;
3796 case MACSEC_CIPHER_ID_GCM_AES_XPN_128:
3797 secy->key_len = MACSEC_GCM_AES_128_SAK_LEN;
3800 case MACSEC_CIPHER_ID_GCM_AES_XPN_256:
3801 secy->key_len = MACSEC_GCM_AES_256_SAK_LEN;
3809 if (data[IFLA_MACSEC_WINDOW]) {
3810 secy->replay_window = nla_get_u32(data[IFLA_MACSEC_WINDOW]);
3812 /* IEEE 802.1AEbw-2013 10.7.8 - maximum replay window
3813 * for XPN cipher suites */
3815 secy->replay_window > MACSEC_XPN_MAX_REPLAY_WINDOW)
3822 static int macsec_changelink(struct net_device *dev, struct nlattr *tb[],
3823 struct nlattr *data[],
3824 struct netlink_ext_ack *extack)
3826 struct macsec_dev *macsec = macsec_priv(dev);
3827 struct macsec_tx_sc tx_sc;
3828 struct macsec_secy secy;
3834 if (data[IFLA_MACSEC_CIPHER_SUITE] ||
3835 data[IFLA_MACSEC_ICV_LEN] ||
3836 data[IFLA_MACSEC_SCI] ||
3837 data[IFLA_MACSEC_PORT])
3840 /* Keep a copy of unmodified secy and tx_sc, in case the offload
3841 * propagation fails, to revert macsec_changelink_common.
3843 memcpy(&secy, &macsec->secy, sizeof(secy));
3844 memcpy(&tx_sc, &macsec->secy.tx_sc, sizeof(tx_sc));
3846 ret = macsec_changelink_common(dev, data);
3850 /* If h/w offloading is available, propagate to the device */
3851 if (macsec_is_offloaded(macsec)) {
3852 const struct macsec_ops *ops;
3853 struct macsec_context ctx;
3856 ops = macsec_get_ops(netdev_priv(dev), &ctx);
3862 ctx.secy = &macsec->secy;
3863 ret = macsec_offload(ops->mdo_upd_secy, &ctx);
3871 memcpy(&macsec->secy.tx_sc, &tx_sc, sizeof(tx_sc));
3872 memcpy(&macsec->secy, &secy, sizeof(secy));
3877 static void macsec_del_dev(struct macsec_dev *macsec)
3881 while (macsec->secy.rx_sc) {
3882 struct macsec_rx_sc *rx_sc = rtnl_dereference(macsec->secy.rx_sc);
3884 rcu_assign_pointer(macsec->secy.rx_sc, rx_sc->next);
3888 for (i = 0; i < MACSEC_NUM_AN; i++) {
3889 struct macsec_tx_sa *sa = rtnl_dereference(macsec->secy.tx_sc.sa[i]);
3892 RCU_INIT_POINTER(macsec->secy.tx_sc.sa[i], NULL);
3898 static void macsec_common_dellink(struct net_device *dev, struct list_head *head)
3900 struct macsec_dev *macsec = macsec_priv(dev);
3901 struct net_device *real_dev = macsec->real_dev;
3903 /* If h/w offloading is available, propagate to the device */
3904 if (macsec_is_offloaded(macsec)) {
3905 const struct macsec_ops *ops;
3906 struct macsec_context ctx;
3908 ops = macsec_get_ops(netdev_priv(dev), &ctx);
3910 ctx.secy = &macsec->secy;
3911 macsec_offload(ops->mdo_del_secy, &ctx);
3915 unregister_netdevice_queue(dev, head);
3916 list_del_rcu(&macsec->secys);
3917 macsec_del_dev(macsec);
3918 netdev_upper_dev_unlink(real_dev, dev);
3920 macsec_generation++;
3923 static void macsec_dellink(struct net_device *dev, struct list_head *head)
3925 struct macsec_dev *macsec = macsec_priv(dev);
3926 struct net_device *real_dev = macsec->real_dev;
3927 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
3929 macsec_common_dellink(dev, head);
3931 if (list_empty(&rxd->secys)) {
3932 netdev_rx_handler_unregister(real_dev);
3937 static int register_macsec_dev(struct net_device *real_dev,
3938 struct net_device *dev)
3940 struct macsec_dev *macsec = macsec_priv(dev);
3941 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
3946 rxd = kmalloc(sizeof(*rxd), GFP_KERNEL);
3950 INIT_LIST_HEAD(&rxd->secys);
3952 err = netdev_rx_handler_register(real_dev, macsec_handle_frame,
3960 list_add_tail_rcu(&macsec->secys, &rxd->secys);
3964 static bool sci_exists(struct net_device *dev, sci_t sci)
3966 struct macsec_rxh_data *rxd = macsec_data_rtnl(dev);
3967 struct macsec_dev *macsec;
3969 list_for_each_entry(macsec, &rxd->secys, secys) {
3970 if (macsec->secy.sci == sci)
3977 static sci_t dev_to_sci(struct net_device *dev, __be16 port)
3979 return make_sci(dev->dev_addr, port);
3982 static int macsec_add_dev(struct net_device *dev, sci_t sci, u8 icv_len)
3984 struct macsec_dev *macsec = macsec_priv(dev);
3985 struct macsec_secy *secy = &macsec->secy;
3987 macsec->stats = netdev_alloc_pcpu_stats(struct pcpu_secy_stats);
3991 secy->tx_sc.stats = netdev_alloc_pcpu_stats(struct pcpu_tx_sc_stats);
3992 if (!secy->tx_sc.stats) {
3993 free_percpu(macsec->stats);
3997 secy->tx_sc.md_dst = metadata_dst_alloc(0, METADATA_MACSEC, GFP_KERNEL);
3998 if (!secy->tx_sc.md_dst) {
3999 free_percpu(secy->tx_sc.stats);
4000 free_percpu(macsec->stats);
4004 if (sci == MACSEC_UNDEF_SCI)
4005 sci = dev_to_sci(dev, MACSEC_PORT_ES);
4008 secy->operational = true;
4009 secy->key_len = DEFAULT_SAK_LEN;
4010 secy->icv_len = icv_len;
4011 secy->validate_frames = MACSEC_VALIDATE_DEFAULT;
4012 secy->protect_frames = true;
4013 secy->replay_protect = false;
4014 secy->xpn = DEFAULT_XPN;
4017 secy->tx_sc.md_dst->u.macsec_info.sci = sci;
4018 secy->tx_sc.active = true;
4019 secy->tx_sc.encoding_sa = DEFAULT_ENCODING_SA;
4020 secy->tx_sc.encrypt = DEFAULT_ENCRYPT;
4021 secy->tx_sc.send_sci = DEFAULT_SEND_SCI;
4022 secy->tx_sc.end_station = false;
4023 secy->tx_sc.scb = false;
4028 static struct lock_class_key macsec_netdev_addr_lock_key;
4030 static int macsec_newlink(struct net *net, struct net_device *dev,
4031 struct nlattr *tb[], struct nlattr *data[],
4032 struct netlink_ext_ack *extack)
4034 struct macsec_dev *macsec = macsec_priv(dev);
4035 rx_handler_func_t *rx_handler;
4036 u8 icv_len = MACSEC_DEFAULT_ICV_LEN;
4037 struct net_device *real_dev;
4043 real_dev = __dev_get_by_index(net, nla_get_u32(tb[IFLA_LINK]));
4046 if (real_dev->type != ARPHRD_ETHER)
4049 dev->priv_flags |= IFF_MACSEC;
4051 macsec->real_dev = real_dev;
4053 if (data && data[IFLA_MACSEC_OFFLOAD])
4054 macsec->offload = nla_get_offload(data[IFLA_MACSEC_OFFLOAD]);
4056 /* MACsec offloading is off by default */
4057 macsec->offload = MACSEC_OFFLOAD_OFF;
4059 /* Check if the offloading mode is supported by the underlying layers */
4060 if (macsec->offload != MACSEC_OFFLOAD_OFF &&
4061 !macsec_check_offload(macsec->offload, macsec))
4064 /* send_sci must be set to true when transmit sci explicitly is set */
4065 if ((data && data[IFLA_MACSEC_SCI]) &&
4066 (data && data[IFLA_MACSEC_INC_SCI])) {
4067 u8 send_sci = !!nla_get_u8(data[IFLA_MACSEC_INC_SCI]);
4073 if (data && data[IFLA_MACSEC_ICV_LEN])
4074 icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]);
4075 mtu = real_dev->mtu - icv_len - macsec_extra_len(true);
4081 rx_handler = rtnl_dereference(real_dev->rx_handler);
4082 if (rx_handler && rx_handler != macsec_handle_frame)
4085 err = register_netdevice(dev);
4089 netdev_lockdep_set_classes(dev);
4090 lockdep_set_class(&dev->addr_list_lock,
4091 &macsec_netdev_addr_lock_key);
4093 err = netdev_upper_dev_link(real_dev, dev, extack);
4097 /* need to be already registered so that ->init has run and
4098 * the MAC addr is set
4100 if (data && data[IFLA_MACSEC_SCI])
4101 sci = nla_get_sci(data[IFLA_MACSEC_SCI]);
4102 else if (data && data[IFLA_MACSEC_PORT])
4103 sci = dev_to_sci(dev, nla_get_be16(data[IFLA_MACSEC_PORT]));
4105 sci = dev_to_sci(dev, MACSEC_PORT_ES);
4107 if (rx_handler && sci_exists(real_dev, sci)) {
4112 err = macsec_add_dev(dev, sci, icv_len);
4117 err = macsec_changelink_common(dev, data);
4122 /* If h/w offloading is available, propagate to the device */
4123 if (macsec_is_offloaded(macsec)) {
4124 const struct macsec_ops *ops;
4125 struct macsec_context ctx;
4127 ops = macsec_get_ops(macsec, &ctx);
4129 ctx.secy = &macsec->secy;
4130 err = macsec_offload(ops->mdo_add_secy, &ctx);
4136 err = register_macsec_dev(real_dev, dev);
4140 netif_stacked_transfer_operstate(real_dev, dev);
4141 linkwatch_fire_event(dev);
4143 macsec_generation++;
4148 macsec_del_dev(macsec);
4150 netdev_upper_dev_unlink(real_dev, dev);
4152 unregister_netdevice(dev);
4156 static int macsec_validate_attr(struct nlattr *tb[], struct nlattr *data[],
4157 struct netlink_ext_ack *extack)
4159 u64 csid = MACSEC_DEFAULT_CIPHER_ID;
4160 u8 icv_len = MACSEC_DEFAULT_ICV_LEN;
4167 if (data[IFLA_MACSEC_CIPHER_SUITE])
4168 csid = nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE]);
4170 if (data[IFLA_MACSEC_ICV_LEN]) {
4171 icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]);
4172 if (icv_len != MACSEC_DEFAULT_ICV_LEN) {
4173 char dummy_key[DEFAULT_SAK_LEN] = { 0 };
4174 struct crypto_aead *dummy_tfm;
4176 dummy_tfm = macsec_alloc_tfm(dummy_key,
4179 if (IS_ERR(dummy_tfm))
4180 return PTR_ERR(dummy_tfm);
4181 crypto_free_aead(dummy_tfm);
4186 case MACSEC_CIPHER_ID_GCM_AES_128:
4187 case MACSEC_CIPHER_ID_GCM_AES_256:
4188 case MACSEC_CIPHER_ID_GCM_AES_XPN_128:
4189 case MACSEC_CIPHER_ID_GCM_AES_XPN_256:
4190 case MACSEC_DEFAULT_CIPHER_ID:
4191 if (icv_len < MACSEC_MIN_ICV_LEN ||
4192 icv_len > MACSEC_STD_ICV_LEN)
4199 if (data[IFLA_MACSEC_ENCODING_SA]) {
4200 if (nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]) >= MACSEC_NUM_AN)
4204 for (flag = IFLA_MACSEC_ENCODING_SA + 1;
4205 flag < IFLA_MACSEC_VALIDATION;
4208 if (nla_get_u8(data[flag]) > 1)
4213 es = data[IFLA_MACSEC_ES] ? nla_get_u8(data[IFLA_MACSEC_ES]) : false;
4214 sci = data[IFLA_MACSEC_INC_SCI] ? nla_get_u8(data[IFLA_MACSEC_INC_SCI]) : false;
4215 scb = data[IFLA_MACSEC_SCB] ? nla_get_u8(data[IFLA_MACSEC_SCB]) : false;
4217 if ((sci && (scb || es)) || (scb && es))
4220 if (data[IFLA_MACSEC_VALIDATION] &&
4221 nla_get_u8(data[IFLA_MACSEC_VALIDATION]) > MACSEC_VALIDATE_MAX)
4224 if ((data[IFLA_MACSEC_REPLAY_PROTECT] &&
4225 nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT])) &&
4226 !data[IFLA_MACSEC_WINDOW])
4232 static struct net *macsec_get_link_net(const struct net_device *dev)
4234 return dev_net(macsec_priv(dev)->real_dev);
4237 static size_t macsec_get_size(const struct net_device *dev)
4239 return nla_total_size_64bit(8) + /* IFLA_MACSEC_SCI */
4240 nla_total_size(1) + /* IFLA_MACSEC_ICV_LEN */
4241 nla_total_size_64bit(8) + /* IFLA_MACSEC_CIPHER_SUITE */
4242 nla_total_size(4) + /* IFLA_MACSEC_WINDOW */
4243 nla_total_size(1) + /* IFLA_MACSEC_ENCODING_SA */
4244 nla_total_size(1) + /* IFLA_MACSEC_ENCRYPT */
4245 nla_total_size(1) + /* IFLA_MACSEC_PROTECT */
4246 nla_total_size(1) + /* IFLA_MACSEC_INC_SCI */
4247 nla_total_size(1) + /* IFLA_MACSEC_ES */
4248 nla_total_size(1) + /* IFLA_MACSEC_SCB */
4249 nla_total_size(1) + /* IFLA_MACSEC_REPLAY_PROTECT */
4250 nla_total_size(1) + /* IFLA_MACSEC_VALIDATION */
4254 static int macsec_fill_info(struct sk_buff *skb,
4255 const struct net_device *dev)
4257 struct macsec_secy *secy = &macsec_priv(dev)->secy;
4258 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
4261 switch (secy->key_len) {
4262 case MACSEC_GCM_AES_128_SAK_LEN:
4263 csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_128 : MACSEC_DEFAULT_CIPHER_ID;
4265 case MACSEC_GCM_AES_256_SAK_LEN:
4266 csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_256 : MACSEC_CIPHER_ID_GCM_AES_256;
4269 goto nla_put_failure;
4272 if (nla_put_sci(skb, IFLA_MACSEC_SCI, secy->sci,
4274 nla_put_u8(skb, IFLA_MACSEC_ICV_LEN, secy->icv_len) ||
4275 nla_put_u64_64bit(skb, IFLA_MACSEC_CIPHER_SUITE,
4276 csid, IFLA_MACSEC_PAD) ||
4277 nla_put_u8(skb, IFLA_MACSEC_ENCODING_SA, tx_sc->encoding_sa) ||
4278 nla_put_u8(skb, IFLA_MACSEC_ENCRYPT, tx_sc->encrypt) ||
4279 nla_put_u8(skb, IFLA_MACSEC_PROTECT, secy->protect_frames) ||
4280 nla_put_u8(skb, IFLA_MACSEC_INC_SCI, tx_sc->send_sci) ||
4281 nla_put_u8(skb, IFLA_MACSEC_ES, tx_sc->end_station) ||
4282 nla_put_u8(skb, IFLA_MACSEC_SCB, tx_sc->scb) ||
4283 nla_put_u8(skb, IFLA_MACSEC_REPLAY_PROTECT, secy->replay_protect) ||
4284 nla_put_u8(skb, IFLA_MACSEC_VALIDATION, secy->validate_frames) ||
4286 goto nla_put_failure;
4288 if (secy->replay_protect) {
4289 if (nla_put_u32(skb, IFLA_MACSEC_WINDOW, secy->replay_window))
4290 goto nla_put_failure;
4299 static struct rtnl_link_ops macsec_link_ops __read_mostly = {
4301 .priv_size = sizeof(struct macsec_dev),
4302 .maxtype = IFLA_MACSEC_MAX,
4303 .policy = macsec_rtnl_policy,
4304 .setup = macsec_setup,
4305 .validate = macsec_validate_attr,
4306 .newlink = macsec_newlink,
4307 .changelink = macsec_changelink,
4308 .dellink = macsec_dellink,
4309 .get_size = macsec_get_size,
4310 .fill_info = macsec_fill_info,
4311 .get_link_net = macsec_get_link_net,
4314 static bool is_macsec_master(struct net_device *dev)
4316 return rcu_access_pointer(dev->rx_handler) == macsec_handle_frame;
4319 static int macsec_notify(struct notifier_block *this, unsigned long event,
4322 struct net_device *real_dev = netdev_notifier_info_to_dev(ptr);
4325 if (!is_macsec_master(real_dev))
4331 case NETDEV_CHANGE: {
4332 struct macsec_dev *m, *n;
4333 struct macsec_rxh_data *rxd;
4335 rxd = macsec_data_rtnl(real_dev);
4336 list_for_each_entry_safe(m, n, &rxd->secys, secys) {
4337 struct net_device *dev = m->secy.netdev;
4339 netif_stacked_transfer_operstate(real_dev, dev);
4343 case NETDEV_UNREGISTER: {
4344 struct macsec_dev *m, *n;
4345 struct macsec_rxh_data *rxd;
4347 rxd = macsec_data_rtnl(real_dev);
4348 list_for_each_entry_safe(m, n, &rxd->secys, secys) {
4349 macsec_common_dellink(m->secy.netdev, &head);
4352 netdev_rx_handler_unregister(real_dev);
4355 unregister_netdevice_many(&head);
4358 case NETDEV_CHANGEMTU: {
4359 struct macsec_dev *m;
4360 struct macsec_rxh_data *rxd;
4362 rxd = macsec_data_rtnl(real_dev);
4363 list_for_each_entry(m, &rxd->secys, secys) {
4364 struct net_device *dev = m->secy.netdev;
4365 unsigned int mtu = real_dev->mtu - (m->secy.icv_len +
4366 macsec_extra_len(true));
4369 dev_set_mtu(dev, mtu);
4377 static struct notifier_block macsec_notifier = {
4378 .notifier_call = macsec_notify,
4381 static int __init macsec_init(void)
4385 pr_info("MACsec IEEE 802.1AE\n");
4386 err = register_netdevice_notifier(&macsec_notifier);
4390 err = rtnl_link_register(&macsec_link_ops);
4394 err = genl_register_family(&macsec_fam);
4401 rtnl_link_unregister(&macsec_link_ops);
4403 unregister_netdevice_notifier(&macsec_notifier);
4407 static void __exit macsec_exit(void)
4409 genl_unregister_family(&macsec_fam);
4410 rtnl_link_unregister(&macsec_link_ops);
4411 unregister_netdevice_notifier(&macsec_notifier);
4415 module_init(macsec_init);
4416 module_exit(macsec_exit);
4418 MODULE_ALIAS_RTNL_LINK("macsec");
4419 MODULE_ALIAS_GENL_FAMILY("macsec");
4421 MODULE_DESCRIPTION("MACsec IEEE 802.1AE");
4422 MODULE_LICENSE("GPL v2");