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 <linux/phy.h>
22 #include <linux/byteorder/generic.h>
23 #include <linux/if_arp.h>
25 #include <uapi/linux/if_macsec.h>
27 #define MACSEC_SCI_LEN 8
29 /* SecTAG length = macsec_eth_header without the optional SCI */
30 #define MACSEC_TAG_LEN 6
32 struct macsec_eth_header {
36 #if defined(__LITTLE_ENDIAN_BITFIELD)
39 #elif defined(__BIG_ENDIAN_BITFIELD)
43 #error "Please fix <asm/byteorder.h>"
46 u8 secure_channel_id[8]; /* optional */
49 #define MACSEC_TCI_VERSION 0x80
50 #define MACSEC_TCI_ES 0x40 /* end station */
51 #define MACSEC_TCI_SC 0x20 /* SCI present */
52 #define MACSEC_TCI_SCB 0x10 /* epon */
53 #define MACSEC_TCI_E 0x08 /* encryption */
54 #define MACSEC_TCI_C 0x04 /* changed text */
55 #define MACSEC_AN_MASK 0x03 /* association number */
56 #define MACSEC_TCI_CONFID (MACSEC_TCI_E | MACSEC_TCI_C)
58 /* minimum secure data length deemed "not short", see IEEE 802.1AE-2006 9.7 */
59 #define MIN_NON_SHORT_LEN 48
61 #define GCM_AES_IV_LEN 12
62 #define DEFAULT_ICV_LEN 16
64 #define for_each_rxsc(secy, sc) \
65 for (sc = rcu_dereference_bh(secy->rx_sc); \
67 sc = rcu_dereference_bh(sc->next))
68 #define for_each_rxsc_rtnl(secy, sc) \
69 for (sc = rtnl_dereference(secy->rx_sc); \
71 sc = rtnl_dereference(sc->next))
73 #define pn_same_half(pn1, pn2) (!(((pn1) >> 31) ^ ((pn2) >> 31)))
77 u8 short_secure_channel_id[4];
85 u8 secure_channel_id[8];
91 #define MACSEC_VALIDATE_DEFAULT MACSEC_VALIDATE_STRICT
93 struct pcpu_secy_stats {
94 struct macsec_dev_stats stats;
95 struct u64_stats_sync syncp;
99 * struct macsec_dev - private data
101 * @real_dev: pointer to underlying netdevice
102 * @stats: MACsec device stats
103 * @secys: linked list of SecY's on the underlying device
104 * @gro_cells: pointer to the Generic Receive Offload cell
105 * @offload: status of offloading on the MACsec device
108 struct macsec_secy secy;
109 struct net_device *real_dev;
110 struct pcpu_secy_stats __percpu *stats;
111 struct list_head secys;
112 struct gro_cells gro_cells;
113 enum macsec_offload offload;
117 * struct macsec_rxh_data - rx_handler private argument
118 * @secys: linked list of SecY's on this underlying device
120 struct macsec_rxh_data {
121 struct list_head secys;
124 static struct macsec_dev *macsec_priv(const struct net_device *dev)
126 return (struct macsec_dev *)netdev_priv(dev);
129 static struct macsec_rxh_data *macsec_data_rcu(const struct net_device *dev)
131 return rcu_dereference_bh(dev->rx_handler_data);
134 static struct macsec_rxh_data *macsec_data_rtnl(const struct net_device *dev)
136 return rtnl_dereference(dev->rx_handler_data);
140 struct aead_request *req;
142 struct macsec_tx_sa *tx_sa;
143 struct macsec_rx_sa *rx_sa;
150 static struct macsec_rx_sa *macsec_rxsa_get(struct macsec_rx_sa __rcu *ptr)
152 struct macsec_rx_sa *sa = rcu_dereference_bh(ptr);
154 if (!sa || !sa->active)
157 if (!refcount_inc_not_zero(&sa->refcnt))
163 static void free_rx_sc_rcu(struct rcu_head *head)
165 struct macsec_rx_sc *rx_sc = container_of(head, struct macsec_rx_sc, rcu_head);
167 free_percpu(rx_sc->stats);
171 static struct macsec_rx_sc *macsec_rxsc_get(struct macsec_rx_sc *sc)
173 return refcount_inc_not_zero(&sc->refcnt) ? sc : NULL;
176 static void macsec_rxsc_put(struct macsec_rx_sc *sc)
178 if (refcount_dec_and_test(&sc->refcnt))
179 call_rcu(&sc->rcu_head, free_rx_sc_rcu);
182 static void free_rxsa(struct rcu_head *head)
184 struct macsec_rx_sa *sa = container_of(head, struct macsec_rx_sa, rcu);
186 crypto_free_aead(sa->key.tfm);
187 free_percpu(sa->stats);
191 static void macsec_rxsa_put(struct macsec_rx_sa *sa)
193 if (refcount_dec_and_test(&sa->refcnt))
194 call_rcu(&sa->rcu, free_rxsa);
197 static struct macsec_tx_sa *macsec_txsa_get(struct macsec_tx_sa __rcu *ptr)
199 struct macsec_tx_sa *sa = rcu_dereference_bh(ptr);
201 if (!sa || !sa->active)
204 if (!refcount_inc_not_zero(&sa->refcnt))
210 static void free_txsa(struct rcu_head *head)
212 struct macsec_tx_sa *sa = container_of(head, struct macsec_tx_sa, rcu);
214 crypto_free_aead(sa->key.tfm);
215 free_percpu(sa->stats);
219 static void macsec_txsa_put(struct macsec_tx_sa *sa)
221 if (refcount_dec_and_test(&sa->refcnt))
222 call_rcu(&sa->rcu, free_txsa);
225 static struct macsec_cb *macsec_skb_cb(struct sk_buff *skb)
227 BUILD_BUG_ON(sizeof(struct macsec_cb) > sizeof(skb->cb));
228 return (struct macsec_cb *)skb->cb;
231 #define MACSEC_PORT_ES (htons(0x0001))
232 #define MACSEC_PORT_SCB (0x0000)
233 #define MACSEC_UNDEF_SCI ((__force sci_t)0xffffffffffffffffULL)
234 #define MACSEC_UNDEF_SSCI ((__force ssci_t)0xffffffff)
236 #define MACSEC_GCM_AES_128_SAK_LEN 16
237 #define MACSEC_GCM_AES_256_SAK_LEN 32
239 #define DEFAULT_SAK_LEN MACSEC_GCM_AES_128_SAK_LEN
240 #define DEFAULT_XPN false
241 #define DEFAULT_SEND_SCI true
242 #define DEFAULT_ENCRYPT false
243 #define DEFAULT_ENCODING_SA 0
245 static bool send_sci(const struct macsec_secy *secy)
247 const struct macsec_tx_sc *tx_sc = &secy->tx_sc;
249 return tx_sc->send_sci ||
250 (secy->n_rx_sc > 1 && !tx_sc->end_station && !tx_sc->scb);
253 static sci_t make_sci(const u8 *addr, __be16 port)
257 memcpy(&sci, addr, ETH_ALEN);
258 memcpy(((char *)&sci) + ETH_ALEN, &port, sizeof(port));
263 static sci_t macsec_frame_sci(struct macsec_eth_header *hdr, bool sci_present)
268 memcpy(&sci, hdr->secure_channel_id,
269 sizeof(hdr->secure_channel_id));
271 sci = make_sci(hdr->eth.h_source, MACSEC_PORT_ES);
276 static unsigned int macsec_sectag_len(bool sci_present)
278 return MACSEC_TAG_LEN + (sci_present ? MACSEC_SCI_LEN : 0);
281 static unsigned int macsec_hdr_len(bool sci_present)
283 return macsec_sectag_len(sci_present) + ETH_HLEN;
286 static unsigned int macsec_extra_len(bool sci_present)
288 return macsec_sectag_len(sci_present) + sizeof(__be16);
291 /* Fill SecTAG according to IEEE 802.1AE-2006 10.5.3 */
292 static void macsec_fill_sectag(struct macsec_eth_header *h,
293 const struct macsec_secy *secy, u32 pn,
296 const struct macsec_tx_sc *tx_sc = &secy->tx_sc;
298 memset(&h->tci_an, 0, macsec_sectag_len(sci_present));
299 h->eth.h_proto = htons(ETH_P_MACSEC);
302 h->tci_an |= MACSEC_TCI_SC;
303 memcpy(&h->secure_channel_id, &secy->sci,
304 sizeof(h->secure_channel_id));
306 if (tx_sc->end_station)
307 h->tci_an |= MACSEC_TCI_ES;
309 h->tci_an |= MACSEC_TCI_SCB;
312 h->packet_number = htonl(pn);
314 /* with GCM, C/E clear for !encrypt, both set for encrypt */
316 h->tci_an |= MACSEC_TCI_CONFID;
317 else if (secy->icv_len != DEFAULT_ICV_LEN)
318 h->tci_an |= MACSEC_TCI_C;
320 h->tci_an |= tx_sc->encoding_sa;
323 static void macsec_set_shortlen(struct macsec_eth_header *h, size_t data_len)
325 if (data_len < MIN_NON_SHORT_LEN)
326 h->short_length = data_len;
329 /* Checks if a MACsec interface is being offloaded to an hardware engine */
330 static bool macsec_is_offloaded(struct macsec_dev *macsec)
332 if (macsec->offload == MACSEC_OFFLOAD_MAC ||
333 macsec->offload == MACSEC_OFFLOAD_PHY)
339 /* Checks if underlying layers implement MACsec offloading functions. */
340 static bool macsec_check_offload(enum macsec_offload offload,
341 struct macsec_dev *macsec)
343 if (!macsec || !macsec->real_dev)
346 if (offload == MACSEC_OFFLOAD_PHY)
347 return macsec->real_dev->phydev &&
348 macsec->real_dev->phydev->macsec_ops;
349 else if (offload == MACSEC_OFFLOAD_MAC)
350 return macsec->real_dev->features & NETIF_F_HW_MACSEC &&
351 macsec->real_dev->macsec_ops;
356 static const struct macsec_ops *__macsec_get_ops(enum macsec_offload offload,
357 struct macsec_dev *macsec,
358 struct macsec_context *ctx)
361 memset(ctx, 0, sizeof(*ctx));
362 ctx->offload = offload;
364 if (offload == MACSEC_OFFLOAD_PHY)
365 ctx->phydev = macsec->real_dev->phydev;
366 else if (offload == MACSEC_OFFLOAD_MAC)
367 ctx->netdev = macsec->real_dev;
370 if (offload == MACSEC_OFFLOAD_PHY)
371 return macsec->real_dev->phydev->macsec_ops;
373 return macsec->real_dev->macsec_ops;
376 /* Returns a pointer to the MACsec ops struct if any and updates the MACsec
377 * context device reference if provided.
379 static const struct macsec_ops *macsec_get_ops(struct macsec_dev *macsec,
380 struct macsec_context *ctx)
382 if (!macsec_check_offload(macsec->offload, macsec))
385 return __macsec_get_ops(macsec->offload, macsec, ctx);
388 /* validate MACsec packet according to IEEE 802.1AE-2018 9.12 */
389 static bool macsec_validate_skb(struct sk_buff *skb, u16 icv_len, bool xpn)
391 struct macsec_eth_header *h = (struct macsec_eth_header *)skb->data;
392 int len = skb->len - 2 * ETH_ALEN;
393 int extra_len = macsec_extra_len(!!(h->tci_an & MACSEC_TCI_SC)) + icv_len;
395 /* a) It comprises at least 17 octets */
399 /* b) MACsec EtherType: already checked */
401 /* c) V bit is clear */
402 if (h->tci_an & MACSEC_TCI_VERSION)
405 /* d) ES or SCB => !SC */
406 if ((h->tci_an & MACSEC_TCI_ES || h->tci_an & MACSEC_TCI_SCB) &&
407 (h->tci_an & MACSEC_TCI_SC))
410 /* e) Bits 7 and 8 of octet 4 of the SecTAG are clear */
414 /* rx.pn != 0 if not XPN (figure 10-5 with 802.11AEbw-2013 amendment) */
415 if (!h->packet_number && !xpn)
418 /* length check, f) g) h) i) */
420 return len == extra_len + h->short_length;
421 return len >= extra_len + MIN_NON_SHORT_LEN;
424 #define MACSEC_NEEDED_HEADROOM (macsec_extra_len(true))
425 #define MACSEC_NEEDED_TAILROOM MACSEC_STD_ICV_LEN
427 static void macsec_fill_iv_xpn(unsigned char *iv, ssci_t ssci, u64 pn,
430 struct gcm_iv_xpn *gcm_iv = (struct gcm_iv_xpn *)iv;
432 gcm_iv->ssci = ssci ^ salt.ssci;
433 gcm_iv->pn = cpu_to_be64(pn) ^ salt.pn;
436 static void macsec_fill_iv(unsigned char *iv, sci_t sci, u32 pn)
438 struct gcm_iv *gcm_iv = (struct gcm_iv *)iv;
441 gcm_iv->pn = htonl(pn);
444 static struct macsec_eth_header *macsec_ethhdr(struct sk_buff *skb)
446 return (struct macsec_eth_header *)skb_mac_header(skb);
449 static sci_t dev_to_sci(struct net_device *dev, __be16 port)
451 return make_sci(dev->dev_addr, port);
454 static void __macsec_pn_wrapped(struct macsec_secy *secy,
455 struct macsec_tx_sa *tx_sa)
457 pr_debug("PN wrapped, transitioning to !oper\n");
458 tx_sa->active = false;
459 if (secy->protect_frames)
460 secy->operational = false;
463 void macsec_pn_wrapped(struct macsec_secy *secy, struct macsec_tx_sa *tx_sa)
465 spin_lock_bh(&tx_sa->lock);
466 __macsec_pn_wrapped(secy, tx_sa);
467 spin_unlock_bh(&tx_sa->lock);
469 EXPORT_SYMBOL_GPL(macsec_pn_wrapped);
471 static pn_t tx_sa_update_pn(struct macsec_tx_sa *tx_sa,
472 struct macsec_secy *secy)
476 spin_lock_bh(&tx_sa->lock);
478 pn = tx_sa->next_pn_halves;
482 tx_sa->next_pn_halves.lower++;
484 if (tx_sa->next_pn == 0)
485 __macsec_pn_wrapped(secy, tx_sa);
486 spin_unlock_bh(&tx_sa->lock);
491 static void macsec_encrypt_finish(struct sk_buff *skb, struct net_device *dev)
493 struct macsec_dev *macsec = netdev_priv(dev);
495 skb->dev = macsec->real_dev;
496 skb_reset_mac_header(skb);
497 skb->protocol = eth_hdr(skb)->h_proto;
500 static void macsec_count_tx(struct sk_buff *skb, struct macsec_tx_sc *tx_sc,
501 struct macsec_tx_sa *tx_sa)
503 struct pcpu_tx_sc_stats *txsc_stats = this_cpu_ptr(tx_sc->stats);
505 u64_stats_update_begin(&txsc_stats->syncp);
506 if (tx_sc->encrypt) {
507 txsc_stats->stats.OutOctetsEncrypted += skb->len;
508 txsc_stats->stats.OutPktsEncrypted++;
509 this_cpu_inc(tx_sa->stats->OutPktsEncrypted);
511 txsc_stats->stats.OutOctetsProtected += skb->len;
512 txsc_stats->stats.OutPktsProtected++;
513 this_cpu_inc(tx_sa->stats->OutPktsProtected);
515 u64_stats_update_end(&txsc_stats->syncp);
518 static void count_tx(struct net_device *dev, int ret, int len)
520 if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
521 struct pcpu_sw_netstats *stats = this_cpu_ptr(dev->tstats);
523 u64_stats_update_begin(&stats->syncp);
525 stats->tx_bytes += len;
526 u64_stats_update_end(&stats->syncp);
530 static void macsec_encrypt_done(struct crypto_async_request *base, int err)
532 struct sk_buff *skb = base->data;
533 struct net_device *dev = skb->dev;
534 struct macsec_dev *macsec = macsec_priv(dev);
535 struct macsec_tx_sa *sa = macsec_skb_cb(skb)->tx_sa;
538 aead_request_free(macsec_skb_cb(skb)->req);
541 macsec_encrypt_finish(skb, dev);
542 macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa);
544 ret = dev_queue_xmit(skb);
545 count_tx(dev, ret, len);
546 rcu_read_unlock_bh();
552 static struct aead_request *macsec_alloc_req(struct crypto_aead *tfm,
554 struct scatterlist **sg,
557 size_t size, iv_offset, sg_offset;
558 struct aead_request *req;
561 size = sizeof(struct aead_request) + crypto_aead_reqsize(tfm);
563 size += GCM_AES_IV_LEN;
565 size = ALIGN(size, __alignof__(struct scatterlist));
567 size += sizeof(struct scatterlist) * num_frags;
569 tmp = kmalloc(size, GFP_ATOMIC);
573 *iv = (unsigned char *)(tmp + iv_offset);
574 *sg = (struct scatterlist *)(tmp + sg_offset);
577 aead_request_set_tfm(req, tfm);
582 static struct sk_buff *macsec_encrypt(struct sk_buff *skb,
583 struct net_device *dev)
586 struct scatterlist *sg;
587 struct sk_buff *trailer;
590 struct macsec_eth_header *hh;
591 size_t unprotected_len;
592 struct aead_request *req;
593 struct macsec_secy *secy;
594 struct macsec_tx_sc *tx_sc;
595 struct macsec_tx_sa *tx_sa;
596 struct macsec_dev *macsec = macsec_priv(dev);
600 secy = &macsec->secy;
601 tx_sc = &secy->tx_sc;
603 /* 10.5.1 TX SA assignment */
604 tx_sa = macsec_txsa_get(tx_sc->sa[tx_sc->encoding_sa]);
606 secy->operational = false;
608 return ERR_PTR(-EINVAL);
611 if (unlikely(skb_headroom(skb) < MACSEC_NEEDED_HEADROOM ||
612 skb_tailroom(skb) < MACSEC_NEEDED_TAILROOM)) {
613 struct sk_buff *nskb = skb_copy_expand(skb,
614 MACSEC_NEEDED_HEADROOM,
615 MACSEC_NEEDED_TAILROOM,
621 macsec_txsa_put(tx_sa);
623 return ERR_PTR(-ENOMEM);
626 skb = skb_unshare(skb, GFP_ATOMIC);
628 macsec_txsa_put(tx_sa);
629 return ERR_PTR(-ENOMEM);
633 unprotected_len = skb->len;
635 sci_present = send_sci(secy);
636 hh = skb_push(skb, macsec_extra_len(sci_present));
637 memmove(hh, eth, 2 * ETH_ALEN);
639 pn = tx_sa_update_pn(tx_sa, secy);
640 if (pn.full64 == 0) {
641 macsec_txsa_put(tx_sa);
643 return ERR_PTR(-ENOLINK);
645 macsec_fill_sectag(hh, secy, pn.lower, sci_present);
646 macsec_set_shortlen(hh, unprotected_len - 2 * ETH_ALEN);
648 skb_put(skb, secy->icv_len);
650 if (skb->len - ETH_HLEN > macsec_priv(dev)->real_dev->mtu) {
651 struct pcpu_secy_stats *secy_stats = this_cpu_ptr(macsec->stats);
653 u64_stats_update_begin(&secy_stats->syncp);
654 secy_stats->stats.OutPktsTooLong++;
655 u64_stats_update_end(&secy_stats->syncp);
657 macsec_txsa_put(tx_sa);
659 return ERR_PTR(-EINVAL);
662 ret = skb_cow_data(skb, 0, &trailer);
663 if (unlikely(ret < 0)) {
664 macsec_txsa_put(tx_sa);
669 req = macsec_alloc_req(tx_sa->key.tfm, &iv, &sg, ret);
671 macsec_txsa_put(tx_sa);
673 return ERR_PTR(-ENOMEM);
677 macsec_fill_iv_xpn(iv, tx_sa->ssci, pn.full64, tx_sa->key.salt);
679 macsec_fill_iv(iv, secy->sci, pn.lower);
681 sg_init_table(sg, ret);
682 ret = skb_to_sgvec(skb, sg, 0, skb->len);
683 if (unlikely(ret < 0)) {
684 aead_request_free(req);
685 macsec_txsa_put(tx_sa);
690 if (tx_sc->encrypt) {
691 int len = skb->len - macsec_hdr_len(sci_present) -
693 aead_request_set_crypt(req, sg, sg, len, iv);
694 aead_request_set_ad(req, macsec_hdr_len(sci_present));
696 aead_request_set_crypt(req, sg, sg, 0, iv);
697 aead_request_set_ad(req, skb->len - secy->icv_len);
700 macsec_skb_cb(skb)->req = req;
701 macsec_skb_cb(skb)->tx_sa = tx_sa;
702 aead_request_set_callback(req, 0, macsec_encrypt_done, skb);
705 ret = crypto_aead_encrypt(req);
706 if (ret == -EINPROGRESS) {
708 } else if (ret != 0) {
711 aead_request_free(req);
712 macsec_txsa_put(tx_sa);
713 return ERR_PTR(-EINVAL);
717 aead_request_free(req);
718 macsec_txsa_put(tx_sa);
723 static bool macsec_post_decrypt(struct sk_buff *skb, struct macsec_secy *secy, u32 pn)
725 struct macsec_rx_sa *rx_sa = macsec_skb_cb(skb)->rx_sa;
726 struct pcpu_rx_sc_stats *rxsc_stats = this_cpu_ptr(rx_sa->sc->stats);
727 struct macsec_eth_header *hdr = macsec_ethhdr(skb);
730 spin_lock(&rx_sa->lock);
731 if (rx_sa->next_pn_halves.lower >= secy->replay_window)
732 lowest_pn = rx_sa->next_pn_halves.lower - secy->replay_window;
734 /* Now perform replay protection check again
735 * (see IEEE 802.1AE-2006 figure 10-5)
737 if (secy->replay_protect && pn < lowest_pn &&
738 (!secy->xpn || pn_same_half(pn, lowest_pn))) {
739 spin_unlock(&rx_sa->lock);
740 u64_stats_update_begin(&rxsc_stats->syncp);
741 rxsc_stats->stats.InPktsLate++;
742 u64_stats_update_end(&rxsc_stats->syncp);
746 if (secy->validate_frames != MACSEC_VALIDATE_DISABLED) {
747 u64_stats_update_begin(&rxsc_stats->syncp);
748 if (hdr->tci_an & MACSEC_TCI_E)
749 rxsc_stats->stats.InOctetsDecrypted += skb->len;
751 rxsc_stats->stats.InOctetsValidated += skb->len;
752 u64_stats_update_end(&rxsc_stats->syncp);
755 if (!macsec_skb_cb(skb)->valid) {
756 spin_unlock(&rx_sa->lock);
759 if (hdr->tci_an & MACSEC_TCI_C ||
760 secy->validate_frames == MACSEC_VALIDATE_STRICT) {
761 u64_stats_update_begin(&rxsc_stats->syncp);
762 rxsc_stats->stats.InPktsNotValid++;
763 u64_stats_update_end(&rxsc_stats->syncp);
767 u64_stats_update_begin(&rxsc_stats->syncp);
768 if (secy->validate_frames == MACSEC_VALIDATE_CHECK) {
769 rxsc_stats->stats.InPktsInvalid++;
770 this_cpu_inc(rx_sa->stats->InPktsInvalid);
771 } else if (pn < lowest_pn) {
772 rxsc_stats->stats.InPktsDelayed++;
774 rxsc_stats->stats.InPktsUnchecked++;
776 u64_stats_update_end(&rxsc_stats->syncp);
778 u64_stats_update_begin(&rxsc_stats->syncp);
779 if (pn < lowest_pn) {
780 rxsc_stats->stats.InPktsDelayed++;
782 rxsc_stats->stats.InPktsOK++;
783 this_cpu_inc(rx_sa->stats->InPktsOK);
785 u64_stats_update_end(&rxsc_stats->syncp);
787 // Instead of "pn >=" - to support pn overflow in xpn
788 if (pn + 1 > rx_sa->next_pn_halves.lower) {
789 rx_sa->next_pn_halves.lower = pn + 1;
790 } else if (secy->xpn &&
791 !pn_same_half(pn, rx_sa->next_pn_halves.lower)) {
792 rx_sa->next_pn_halves.upper++;
793 rx_sa->next_pn_halves.lower = pn + 1;
796 spin_unlock(&rx_sa->lock);
802 static void macsec_reset_skb(struct sk_buff *skb, struct net_device *dev)
804 skb->pkt_type = PACKET_HOST;
805 skb->protocol = eth_type_trans(skb, dev);
807 skb_reset_network_header(skb);
808 if (!skb_transport_header_was_set(skb))
809 skb_reset_transport_header(skb);
810 skb_reset_mac_len(skb);
813 static void macsec_finalize_skb(struct sk_buff *skb, u8 icv_len, u8 hdr_len)
815 skb->ip_summed = CHECKSUM_NONE;
816 memmove(skb->data + hdr_len, skb->data, 2 * ETH_ALEN);
817 skb_pull(skb, hdr_len);
818 pskb_trim_unique(skb, skb->len - icv_len);
821 static void count_rx(struct net_device *dev, int len)
823 struct pcpu_sw_netstats *stats = this_cpu_ptr(dev->tstats);
825 u64_stats_update_begin(&stats->syncp);
827 stats->rx_bytes += len;
828 u64_stats_update_end(&stats->syncp);
831 static void macsec_decrypt_done(struct crypto_async_request *base, int err)
833 struct sk_buff *skb = base->data;
834 struct net_device *dev = skb->dev;
835 struct macsec_dev *macsec = macsec_priv(dev);
836 struct macsec_rx_sa *rx_sa = macsec_skb_cb(skb)->rx_sa;
837 struct macsec_rx_sc *rx_sc = rx_sa->sc;
841 aead_request_free(macsec_skb_cb(skb)->req);
844 macsec_skb_cb(skb)->valid = true;
847 pn = ntohl(macsec_ethhdr(skb)->packet_number);
848 if (!macsec_post_decrypt(skb, &macsec->secy, pn)) {
849 rcu_read_unlock_bh();
854 macsec_finalize_skb(skb, macsec->secy.icv_len,
855 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
856 macsec_reset_skb(skb, macsec->secy.netdev);
859 if (gro_cells_receive(&macsec->gro_cells, skb) == NET_RX_SUCCESS)
862 rcu_read_unlock_bh();
865 macsec_rxsa_put(rx_sa);
866 macsec_rxsc_put(rx_sc);
870 static struct sk_buff *macsec_decrypt(struct sk_buff *skb,
871 struct net_device *dev,
872 struct macsec_rx_sa *rx_sa,
874 struct macsec_secy *secy)
877 struct scatterlist *sg;
878 struct sk_buff *trailer;
880 struct aead_request *req;
881 struct macsec_eth_header *hdr;
883 u16 icv_len = secy->icv_len;
885 macsec_skb_cb(skb)->valid = false;
886 skb = skb_share_check(skb, GFP_ATOMIC);
888 return ERR_PTR(-ENOMEM);
890 ret = skb_cow_data(skb, 0, &trailer);
891 if (unlikely(ret < 0)) {
895 req = macsec_alloc_req(rx_sa->key.tfm, &iv, &sg, ret);
898 return ERR_PTR(-ENOMEM);
901 hdr = (struct macsec_eth_header *)skb->data;
902 hdr_pn = ntohl(hdr->packet_number);
905 pn_t recovered_pn = rx_sa->next_pn_halves;
907 recovered_pn.lower = hdr_pn;
908 if (hdr_pn < rx_sa->next_pn_halves.lower &&
909 !pn_same_half(hdr_pn, rx_sa->next_pn_halves.lower))
910 recovered_pn.upper++;
912 macsec_fill_iv_xpn(iv, rx_sa->ssci, recovered_pn.full64,
915 macsec_fill_iv(iv, sci, hdr_pn);
918 sg_init_table(sg, ret);
919 ret = skb_to_sgvec(skb, sg, 0, skb->len);
920 if (unlikely(ret < 0)) {
921 aead_request_free(req);
926 if (hdr->tci_an & MACSEC_TCI_E) {
927 /* confidentiality: ethernet + macsec header
928 * authenticated, encrypted payload
930 int len = skb->len - macsec_hdr_len(macsec_skb_cb(skb)->has_sci);
932 aead_request_set_crypt(req, sg, sg, len, iv);
933 aead_request_set_ad(req, macsec_hdr_len(macsec_skb_cb(skb)->has_sci));
934 skb = skb_unshare(skb, GFP_ATOMIC);
936 aead_request_free(req);
937 return ERR_PTR(-ENOMEM);
940 /* integrity only: all headers + data authenticated */
941 aead_request_set_crypt(req, sg, sg, icv_len, iv);
942 aead_request_set_ad(req, skb->len - icv_len);
945 macsec_skb_cb(skb)->req = req;
947 aead_request_set_callback(req, 0, macsec_decrypt_done, skb);
950 ret = crypto_aead_decrypt(req);
951 if (ret == -EINPROGRESS) {
953 } else if (ret != 0) {
954 /* decryption/authentication failed
955 * 10.6 if validateFrames is disabled, deliver anyway
957 if (ret != -EBADMSG) {
962 macsec_skb_cb(skb)->valid = true;
966 aead_request_free(req);
971 static struct macsec_rx_sc *find_rx_sc(struct macsec_secy *secy, sci_t sci)
973 struct macsec_rx_sc *rx_sc;
975 for_each_rxsc(secy, rx_sc) {
976 if (rx_sc->sci == sci)
983 static struct macsec_rx_sc *find_rx_sc_rtnl(struct macsec_secy *secy, sci_t sci)
985 struct macsec_rx_sc *rx_sc;
987 for_each_rxsc_rtnl(secy, rx_sc) {
988 if (rx_sc->sci == sci)
995 static enum rx_handler_result handle_not_macsec(struct sk_buff *skb)
997 /* Deliver to the uncontrolled port by default */
998 enum rx_handler_result ret = RX_HANDLER_PASS;
999 struct ethhdr *hdr = eth_hdr(skb);
1000 struct macsec_rxh_data *rxd;
1001 struct macsec_dev *macsec;
1004 rxd = macsec_data_rcu(skb->dev);
1006 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1007 struct sk_buff *nskb;
1008 struct pcpu_secy_stats *secy_stats = this_cpu_ptr(macsec->stats);
1009 struct net_device *ndev = macsec->secy.netdev;
1011 /* If h/w offloading is enabled, HW decodes frames and strips
1012 * the SecTAG, so we have to deduce which port to deliver to.
1014 if (macsec_is_offloaded(macsec) && netif_running(ndev)) {
1015 if (ether_addr_equal_64bits(hdr->h_dest,
1017 /* exact match, divert skb to this port */
1019 skb->pkt_type = PACKET_HOST;
1020 ret = RX_HANDLER_ANOTHER;
1022 } else if (is_multicast_ether_addr_64bits(
1024 /* multicast frame, deliver on this port too */
1025 nskb = skb_clone(skb, GFP_ATOMIC);
1030 if (ether_addr_equal_64bits(hdr->h_dest,
1032 nskb->pkt_type = PACKET_BROADCAST;
1034 nskb->pkt_type = PACKET_MULTICAST;
1041 /* 10.6 If the management control validateFrames is not
1042 * Strict, frames without a SecTAG are received, counted, and
1043 * delivered to the Controlled Port
1045 if (macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) {
1046 u64_stats_update_begin(&secy_stats->syncp);
1047 secy_stats->stats.InPktsNoTag++;
1048 u64_stats_update_end(&secy_stats->syncp);
1052 /* deliver on this port */
1053 nskb = skb_clone(skb, GFP_ATOMIC);
1059 if (__netif_rx(nskb) == NET_RX_SUCCESS) {
1060 u64_stats_update_begin(&secy_stats->syncp);
1061 secy_stats->stats.InPktsUntagged++;
1062 u64_stats_update_end(&secy_stats->syncp);
1071 static rx_handler_result_t macsec_handle_frame(struct sk_buff **pskb)
1073 struct sk_buff *skb = *pskb;
1074 struct net_device *dev = skb->dev;
1075 struct macsec_eth_header *hdr;
1076 struct macsec_secy *secy = NULL;
1077 struct macsec_rx_sc *rx_sc;
1078 struct macsec_rx_sa *rx_sa;
1079 struct macsec_rxh_data *rxd;
1080 struct macsec_dev *macsec;
1085 struct pcpu_rx_sc_stats *rxsc_stats;
1086 struct pcpu_secy_stats *secy_stats;
1090 if (skb_headroom(skb) < ETH_HLEN)
1093 hdr = macsec_ethhdr(skb);
1094 if (hdr->eth.h_proto != htons(ETH_P_MACSEC))
1095 return handle_not_macsec(skb);
1097 skb = skb_unshare(skb, GFP_ATOMIC);
1100 return RX_HANDLER_CONSUMED;
1102 pulled_sci = pskb_may_pull(skb, macsec_extra_len(true));
1104 if (!pskb_may_pull(skb, macsec_extra_len(false)))
1108 hdr = macsec_ethhdr(skb);
1110 /* Frames with a SecTAG that has the TCI E bit set but the C
1111 * bit clear are discarded, as this reserved encoding is used
1112 * to identify frames with a SecTAG that are not to be
1113 * delivered to the Controlled Port.
1115 if ((hdr->tci_an & (MACSEC_TCI_C | MACSEC_TCI_E)) == MACSEC_TCI_E)
1116 return RX_HANDLER_PASS;
1118 /* now, pull the extra length */
1119 if (hdr->tci_an & MACSEC_TCI_SC) {
1124 /* ethernet header is part of crypto processing */
1125 skb_push(skb, ETH_HLEN);
1127 macsec_skb_cb(skb)->has_sci = !!(hdr->tci_an & MACSEC_TCI_SC);
1128 macsec_skb_cb(skb)->assoc_num = hdr->tci_an & MACSEC_AN_MASK;
1129 sci = macsec_frame_sci(hdr, macsec_skb_cb(skb)->has_sci);
1132 rxd = macsec_data_rcu(skb->dev);
1134 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1135 struct macsec_rx_sc *sc = find_rx_sc(&macsec->secy, sci);
1137 sc = sc ? macsec_rxsc_get(sc) : NULL;
1140 secy = &macsec->secy;
1150 macsec = macsec_priv(dev);
1151 secy_stats = this_cpu_ptr(macsec->stats);
1152 rxsc_stats = this_cpu_ptr(rx_sc->stats);
1154 if (!macsec_validate_skb(skb, secy->icv_len, secy->xpn)) {
1155 u64_stats_update_begin(&secy_stats->syncp);
1156 secy_stats->stats.InPktsBadTag++;
1157 u64_stats_update_end(&secy_stats->syncp);
1161 rx_sa = macsec_rxsa_get(rx_sc->sa[macsec_skb_cb(skb)->assoc_num]);
1163 /* 10.6.1 if the SA is not in use */
1165 /* If validateFrames is Strict or the C bit in the
1166 * SecTAG is set, discard
1168 if (hdr->tci_an & MACSEC_TCI_C ||
1169 secy->validate_frames == MACSEC_VALIDATE_STRICT) {
1170 u64_stats_update_begin(&rxsc_stats->syncp);
1171 rxsc_stats->stats.InPktsNotUsingSA++;
1172 u64_stats_update_end(&rxsc_stats->syncp);
1176 /* not Strict, the frame (with the SecTAG and ICV
1177 * removed) is delivered to the Controlled Port.
1179 u64_stats_update_begin(&rxsc_stats->syncp);
1180 rxsc_stats->stats.InPktsUnusedSA++;
1181 u64_stats_update_end(&rxsc_stats->syncp);
1185 /* First, PN check to avoid decrypting obviously wrong packets */
1186 hdr_pn = ntohl(hdr->packet_number);
1187 if (secy->replay_protect) {
1190 spin_lock(&rx_sa->lock);
1191 late = rx_sa->next_pn_halves.lower >= secy->replay_window &&
1192 hdr_pn < (rx_sa->next_pn_halves.lower - secy->replay_window);
1195 late = late && pn_same_half(rx_sa->next_pn_halves.lower, hdr_pn);
1196 spin_unlock(&rx_sa->lock);
1199 u64_stats_update_begin(&rxsc_stats->syncp);
1200 rxsc_stats->stats.InPktsLate++;
1201 u64_stats_update_end(&rxsc_stats->syncp);
1206 macsec_skb_cb(skb)->rx_sa = rx_sa;
1208 /* Disabled && !changed text => skip validation */
1209 if (hdr->tci_an & MACSEC_TCI_C ||
1210 secy->validate_frames != MACSEC_VALIDATE_DISABLED)
1211 skb = macsec_decrypt(skb, dev, rx_sa, sci, secy);
1214 /* the decrypt callback needs the reference */
1215 if (PTR_ERR(skb) != -EINPROGRESS) {
1216 macsec_rxsa_put(rx_sa);
1217 macsec_rxsc_put(rx_sc);
1221 return RX_HANDLER_CONSUMED;
1224 if (!macsec_post_decrypt(skb, secy, hdr_pn))
1228 macsec_finalize_skb(skb, secy->icv_len,
1229 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
1230 macsec_reset_skb(skb, secy->netdev);
1233 macsec_rxsa_put(rx_sa);
1234 macsec_rxsc_put(rx_sc);
1238 ret = gro_cells_receive(&macsec->gro_cells, skb);
1239 if (ret == NET_RX_SUCCESS)
1242 macsec->secy.netdev->stats.rx_dropped++;
1247 return RX_HANDLER_CONSUMED;
1250 macsec_rxsa_put(rx_sa);
1252 macsec_rxsc_put(rx_sc);
1257 return RX_HANDLER_CONSUMED;
1260 /* 10.6.1 if the SC is not found */
1261 cbit = !!(hdr->tci_an & MACSEC_TCI_C);
1263 macsec_finalize_skb(skb, DEFAULT_ICV_LEN,
1264 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
1266 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1267 struct sk_buff *nskb;
1269 secy_stats = this_cpu_ptr(macsec->stats);
1271 /* If validateFrames is Strict or the C bit in the
1272 * SecTAG is set, discard
1275 macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) {
1276 u64_stats_update_begin(&secy_stats->syncp);
1277 secy_stats->stats.InPktsNoSCI++;
1278 u64_stats_update_end(&secy_stats->syncp);
1282 /* not strict, the frame (with the SecTAG and ICV
1283 * removed) is delivered to the Controlled Port.
1285 nskb = skb_clone(skb, GFP_ATOMIC);
1289 macsec_reset_skb(nskb, macsec->secy.netdev);
1291 ret = __netif_rx(nskb);
1292 if (ret == NET_RX_SUCCESS) {
1293 u64_stats_update_begin(&secy_stats->syncp);
1294 secy_stats->stats.InPktsUnknownSCI++;
1295 u64_stats_update_end(&secy_stats->syncp);
1297 macsec->secy.netdev->stats.rx_dropped++;
1303 return RX_HANDLER_PASS;
1306 static struct crypto_aead *macsec_alloc_tfm(char *key, int key_len, int icv_len)
1308 struct crypto_aead *tfm;
1311 /* Pick a sync gcm(aes) cipher to ensure order is preserved. */
1312 tfm = crypto_alloc_aead("gcm(aes)", 0, CRYPTO_ALG_ASYNC);
1317 ret = crypto_aead_setkey(tfm, key, key_len);
1321 ret = crypto_aead_setauthsize(tfm, icv_len);
1327 crypto_free_aead(tfm);
1328 return ERR_PTR(ret);
1331 static int init_rx_sa(struct macsec_rx_sa *rx_sa, char *sak, int key_len,
1334 rx_sa->stats = alloc_percpu(struct macsec_rx_sa_stats);
1338 rx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len);
1339 if (IS_ERR(rx_sa->key.tfm)) {
1340 free_percpu(rx_sa->stats);
1341 return PTR_ERR(rx_sa->key.tfm);
1344 rx_sa->ssci = MACSEC_UNDEF_SSCI;
1345 rx_sa->active = false;
1347 refcount_set(&rx_sa->refcnt, 1);
1348 spin_lock_init(&rx_sa->lock);
1353 static void clear_rx_sa(struct macsec_rx_sa *rx_sa)
1355 rx_sa->active = false;
1357 macsec_rxsa_put(rx_sa);
1360 static void free_rx_sc(struct macsec_rx_sc *rx_sc)
1364 for (i = 0; i < MACSEC_NUM_AN; i++) {
1365 struct macsec_rx_sa *sa = rtnl_dereference(rx_sc->sa[i]);
1367 RCU_INIT_POINTER(rx_sc->sa[i], NULL);
1372 macsec_rxsc_put(rx_sc);
1375 static struct macsec_rx_sc *del_rx_sc(struct macsec_secy *secy, sci_t sci)
1377 struct macsec_rx_sc *rx_sc, __rcu **rx_scp;
1379 for (rx_scp = &secy->rx_sc, rx_sc = rtnl_dereference(*rx_scp);
1381 rx_scp = &rx_sc->next, rx_sc = rtnl_dereference(*rx_scp)) {
1382 if (rx_sc->sci == sci) {
1385 rcu_assign_pointer(*rx_scp, rx_sc->next);
1393 static struct macsec_rx_sc *create_rx_sc(struct net_device *dev, sci_t sci)
1395 struct macsec_rx_sc *rx_sc;
1396 struct macsec_dev *macsec;
1397 struct net_device *real_dev = macsec_priv(dev)->real_dev;
1398 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
1399 struct macsec_secy *secy;
1401 list_for_each_entry(macsec, &rxd->secys, secys) {
1402 if (find_rx_sc_rtnl(&macsec->secy, sci))
1403 return ERR_PTR(-EEXIST);
1406 rx_sc = kzalloc(sizeof(*rx_sc), GFP_KERNEL);
1408 return ERR_PTR(-ENOMEM);
1410 rx_sc->stats = netdev_alloc_pcpu_stats(struct pcpu_rx_sc_stats);
1411 if (!rx_sc->stats) {
1413 return ERR_PTR(-ENOMEM);
1417 rx_sc->active = true;
1418 refcount_set(&rx_sc->refcnt, 1);
1420 secy = &macsec_priv(dev)->secy;
1421 rcu_assign_pointer(rx_sc->next, secy->rx_sc);
1422 rcu_assign_pointer(secy->rx_sc, rx_sc);
1430 static int init_tx_sa(struct macsec_tx_sa *tx_sa, char *sak, int key_len,
1433 tx_sa->stats = alloc_percpu(struct macsec_tx_sa_stats);
1437 tx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len);
1438 if (IS_ERR(tx_sa->key.tfm)) {
1439 free_percpu(tx_sa->stats);
1440 return PTR_ERR(tx_sa->key.tfm);
1443 tx_sa->ssci = MACSEC_UNDEF_SSCI;
1444 tx_sa->active = false;
1445 refcount_set(&tx_sa->refcnt, 1);
1446 spin_lock_init(&tx_sa->lock);
1451 static void clear_tx_sa(struct macsec_tx_sa *tx_sa)
1453 tx_sa->active = false;
1455 macsec_txsa_put(tx_sa);
1458 static struct genl_family macsec_fam;
1460 static struct net_device *get_dev_from_nl(struct net *net,
1461 struct nlattr **attrs)
1463 int ifindex = nla_get_u32(attrs[MACSEC_ATTR_IFINDEX]);
1464 struct net_device *dev;
1466 dev = __dev_get_by_index(net, ifindex);
1468 return ERR_PTR(-ENODEV);
1470 if (!netif_is_macsec(dev))
1471 return ERR_PTR(-ENODEV);
1476 static enum macsec_offload nla_get_offload(const struct nlattr *nla)
1478 return (__force enum macsec_offload)nla_get_u8(nla);
1481 static sci_t nla_get_sci(const struct nlattr *nla)
1483 return (__force sci_t)nla_get_u64(nla);
1486 static int nla_put_sci(struct sk_buff *skb, int attrtype, sci_t value,
1489 return nla_put_u64_64bit(skb, attrtype, (__force u64)value, padattr);
1492 static ssci_t nla_get_ssci(const struct nlattr *nla)
1494 return (__force ssci_t)nla_get_u32(nla);
1497 static int nla_put_ssci(struct sk_buff *skb, int attrtype, ssci_t value)
1499 return nla_put_u32(skb, attrtype, (__force u64)value);
1502 static struct macsec_tx_sa *get_txsa_from_nl(struct net *net,
1503 struct nlattr **attrs,
1504 struct nlattr **tb_sa,
1505 struct net_device **devp,
1506 struct macsec_secy **secyp,
1507 struct macsec_tx_sc **scp,
1510 struct net_device *dev;
1511 struct macsec_secy *secy;
1512 struct macsec_tx_sc *tx_sc;
1513 struct macsec_tx_sa *tx_sa;
1515 if (!tb_sa[MACSEC_SA_ATTR_AN])
1516 return ERR_PTR(-EINVAL);
1518 *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1520 dev = get_dev_from_nl(net, attrs);
1522 return ERR_CAST(dev);
1524 if (*assoc_num >= MACSEC_NUM_AN)
1525 return ERR_PTR(-EINVAL);
1527 secy = &macsec_priv(dev)->secy;
1528 tx_sc = &secy->tx_sc;
1530 tx_sa = rtnl_dereference(tx_sc->sa[*assoc_num]);
1532 return ERR_PTR(-ENODEV);
1540 static struct macsec_rx_sc *get_rxsc_from_nl(struct net *net,
1541 struct nlattr **attrs,
1542 struct nlattr **tb_rxsc,
1543 struct net_device **devp,
1544 struct macsec_secy **secyp)
1546 struct net_device *dev;
1547 struct macsec_secy *secy;
1548 struct macsec_rx_sc *rx_sc;
1551 dev = get_dev_from_nl(net, attrs);
1553 return ERR_CAST(dev);
1555 secy = &macsec_priv(dev)->secy;
1557 if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI])
1558 return ERR_PTR(-EINVAL);
1560 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1561 rx_sc = find_rx_sc_rtnl(secy, sci);
1563 return ERR_PTR(-ENODEV);
1571 static struct macsec_rx_sa *get_rxsa_from_nl(struct net *net,
1572 struct nlattr **attrs,
1573 struct nlattr **tb_rxsc,
1574 struct nlattr **tb_sa,
1575 struct net_device **devp,
1576 struct macsec_secy **secyp,
1577 struct macsec_rx_sc **scp,
1580 struct macsec_rx_sc *rx_sc;
1581 struct macsec_rx_sa *rx_sa;
1583 if (!tb_sa[MACSEC_SA_ATTR_AN])
1584 return ERR_PTR(-EINVAL);
1586 *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1587 if (*assoc_num >= MACSEC_NUM_AN)
1588 return ERR_PTR(-EINVAL);
1590 rx_sc = get_rxsc_from_nl(net, attrs, tb_rxsc, devp, secyp);
1592 return ERR_CAST(rx_sc);
1594 rx_sa = rtnl_dereference(rx_sc->sa[*assoc_num]);
1596 return ERR_PTR(-ENODEV);
1602 static const struct nla_policy macsec_genl_policy[NUM_MACSEC_ATTR] = {
1603 [MACSEC_ATTR_IFINDEX] = { .type = NLA_U32 },
1604 [MACSEC_ATTR_RXSC_CONFIG] = { .type = NLA_NESTED },
1605 [MACSEC_ATTR_SA_CONFIG] = { .type = NLA_NESTED },
1606 [MACSEC_ATTR_OFFLOAD] = { .type = NLA_NESTED },
1609 static const struct nla_policy macsec_genl_rxsc_policy[NUM_MACSEC_RXSC_ATTR] = {
1610 [MACSEC_RXSC_ATTR_SCI] = { .type = NLA_U64 },
1611 [MACSEC_RXSC_ATTR_ACTIVE] = { .type = NLA_U8 },
1614 static const struct nla_policy macsec_genl_sa_policy[NUM_MACSEC_SA_ATTR] = {
1615 [MACSEC_SA_ATTR_AN] = { .type = NLA_U8 },
1616 [MACSEC_SA_ATTR_ACTIVE] = { .type = NLA_U8 },
1617 [MACSEC_SA_ATTR_PN] = NLA_POLICY_MIN_LEN(4),
1618 [MACSEC_SA_ATTR_KEYID] = { .type = NLA_BINARY,
1619 .len = MACSEC_KEYID_LEN, },
1620 [MACSEC_SA_ATTR_KEY] = { .type = NLA_BINARY,
1621 .len = MACSEC_MAX_KEY_LEN, },
1622 [MACSEC_SA_ATTR_SSCI] = { .type = NLA_U32 },
1623 [MACSEC_SA_ATTR_SALT] = { .type = NLA_BINARY,
1624 .len = MACSEC_SALT_LEN, },
1627 static const struct nla_policy macsec_genl_offload_policy[NUM_MACSEC_OFFLOAD_ATTR] = {
1628 [MACSEC_OFFLOAD_ATTR_TYPE] = { .type = NLA_U8 },
1631 /* Offloads an operation to a device driver */
1632 static int macsec_offload(int (* const func)(struct macsec_context *),
1633 struct macsec_context *ctx)
1637 if (unlikely(!func))
1640 if (ctx->offload == MACSEC_OFFLOAD_PHY)
1641 mutex_lock(&ctx->phydev->lock);
1643 /* Phase I: prepare. The drive should fail here if there are going to be
1644 * issues in the commit phase.
1646 ctx->prepare = true;
1651 /* Phase II: commit. This step cannot fail. */
1652 ctx->prepare = false;
1654 /* This should never happen: commit is not allowed to fail */
1656 WARN(1, "MACsec offloading commit failed (%d)\n", ret);
1659 if (ctx->offload == MACSEC_OFFLOAD_PHY)
1660 mutex_unlock(&ctx->phydev->lock);
1665 static int parse_sa_config(struct nlattr **attrs, struct nlattr **tb_sa)
1667 if (!attrs[MACSEC_ATTR_SA_CONFIG])
1670 if (nla_parse_nested_deprecated(tb_sa, MACSEC_SA_ATTR_MAX, attrs[MACSEC_ATTR_SA_CONFIG], macsec_genl_sa_policy, NULL))
1676 static int parse_rxsc_config(struct nlattr **attrs, struct nlattr **tb_rxsc)
1678 if (!attrs[MACSEC_ATTR_RXSC_CONFIG])
1681 if (nla_parse_nested_deprecated(tb_rxsc, MACSEC_RXSC_ATTR_MAX, attrs[MACSEC_ATTR_RXSC_CONFIG], macsec_genl_rxsc_policy, NULL))
1687 static bool validate_add_rxsa(struct nlattr **attrs)
1689 if (!attrs[MACSEC_SA_ATTR_AN] ||
1690 !attrs[MACSEC_SA_ATTR_KEY] ||
1691 !attrs[MACSEC_SA_ATTR_KEYID])
1694 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
1697 if (attrs[MACSEC_SA_ATTR_PN] &&
1698 *(u64 *)nla_data(attrs[MACSEC_SA_ATTR_PN]) == 0)
1701 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
1702 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
1706 if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN)
1712 static int macsec_add_rxsa(struct sk_buff *skb, struct genl_info *info)
1714 struct net_device *dev;
1715 struct nlattr **attrs = info->attrs;
1716 struct macsec_secy *secy;
1717 struct macsec_rx_sc *rx_sc;
1718 struct macsec_rx_sa *rx_sa;
1719 unsigned char assoc_num;
1721 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1722 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1725 if (!attrs[MACSEC_ATTR_IFINDEX])
1728 if (parse_sa_config(attrs, tb_sa))
1731 if (parse_rxsc_config(attrs, tb_rxsc))
1734 if (!validate_add_rxsa(tb_sa))
1738 rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy);
1739 if (IS_ERR(rx_sc)) {
1741 return PTR_ERR(rx_sc);
1744 assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1746 if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) {
1747 pr_notice("macsec: nl: add_rxsa: bad key length: %d != %d\n",
1748 nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len);
1753 pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
1754 if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
1755 pr_notice("macsec: nl: add_rxsa: bad pn length: %d != %d\n",
1756 nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
1762 if (!tb_sa[MACSEC_SA_ATTR_SSCI] || !tb_sa[MACSEC_SA_ATTR_SALT]) {
1767 if (nla_len(tb_sa[MACSEC_SA_ATTR_SALT]) != MACSEC_SALT_LEN) {
1768 pr_notice("macsec: nl: add_rxsa: bad salt length: %d != %d\n",
1769 nla_len(tb_sa[MACSEC_SA_ATTR_SALT]),
1770 MACSEC_SA_ATTR_SALT);
1776 rx_sa = rtnl_dereference(rx_sc->sa[assoc_num]);
1782 rx_sa = kmalloc(sizeof(*rx_sa), GFP_KERNEL);
1788 err = init_rx_sa(rx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
1789 secy->key_len, secy->icv_len);
1796 if (tb_sa[MACSEC_SA_ATTR_PN]) {
1797 spin_lock_bh(&rx_sa->lock);
1798 rx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
1799 spin_unlock_bh(&rx_sa->lock);
1802 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
1803 rx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
1807 /* If h/w offloading is available, propagate to the device */
1808 if (macsec_is_offloaded(netdev_priv(dev))) {
1809 const struct macsec_ops *ops;
1810 struct macsec_context ctx;
1812 ops = macsec_get_ops(netdev_priv(dev), &ctx);
1818 ctx.sa.assoc_num = assoc_num;
1819 ctx.sa.rx_sa = rx_sa;
1821 memcpy(ctx.sa.key, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
1824 err = macsec_offload(ops->mdo_add_rxsa, &ctx);
1830 rx_sa->ssci = nla_get_ssci(tb_sa[MACSEC_SA_ATTR_SSCI]);
1831 nla_memcpy(rx_sa->key.salt.bytes, tb_sa[MACSEC_SA_ATTR_SALT],
1835 nla_memcpy(rx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN);
1836 rcu_assign_pointer(rx_sc->sa[assoc_num], rx_sa);
1848 static bool validate_add_rxsc(struct nlattr **attrs)
1850 if (!attrs[MACSEC_RXSC_ATTR_SCI])
1853 if (attrs[MACSEC_RXSC_ATTR_ACTIVE]) {
1854 if (nla_get_u8(attrs[MACSEC_RXSC_ATTR_ACTIVE]) > 1)
1861 static int macsec_add_rxsc(struct sk_buff *skb, struct genl_info *info)
1863 struct net_device *dev;
1864 sci_t sci = MACSEC_UNDEF_SCI;
1865 struct nlattr **attrs = info->attrs;
1866 struct macsec_rx_sc *rx_sc;
1867 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1868 struct macsec_secy *secy;
1872 if (!attrs[MACSEC_ATTR_IFINDEX])
1875 if (parse_rxsc_config(attrs, tb_rxsc))
1878 if (!validate_add_rxsc(tb_rxsc))
1882 dev = get_dev_from_nl(genl_info_net(info), attrs);
1885 return PTR_ERR(dev);
1888 secy = &macsec_priv(dev)->secy;
1889 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1891 rx_sc = create_rx_sc(dev, sci);
1892 if (IS_ERR(rx_sc)) {
1894 return PTR_ERR(rx_sc);
1897 was_active = rx_sc->active;
1898 if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE])
1899 rx_sc->active = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]);
1901 if (macsec_is_offloaded(netdev_priv(dev))) {
1902 const struct macsec_ops *ops;
1903 struct macsec_context ctx;
1905 ops = macsec_get_ops(netdev_priv(dev), &ctx);
1914 ret = macsec_offload(ops->mdo_add_rxsc, &ctx);
1924 rx_sc->active = was_active;
1929 static bool validate_add_txsa(struct nlattr **attrs)
1931 if (!attrs[MACSEC_SA_ATTR_AN] ||
1932 !attrs[MACSEC_SA_ATTR_PN] ||
1933 !attrs[MACSEC_SA_ATTR_KEY] ||
1934 !attrs[MACSEC_SA_ATTR_KEYID])
1937 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
1940 if (nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0)
1943 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
1944 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
1948 if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN)
1954 static int macsec_add_txsa(struct sk_buff *skb, struct genl_info *info)
1956 struct net_device *dev;
1957 struct nlattr **attrs = info->attrs;
1958 struct macsec_secy *secy;
1959 struct macsec_tx_sc *tx_sc;
1960 struct macsec_tx_sa *tx_sa;
1961 unsigned char assoc_num;
1963 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1964 bool was_operational;
1967 if (!attrs[MACSEC_ATTR_IFINDEX])
1970 if (parse_sa_config(attrs, tb_sa))
1973 if (!validate_add_txsa(tb_sa))
1977 dev = get_dev_from_nl(genl_info_net(info), attrs);
1980 return PTR_ERR(dev);
1983 secy = &macsec_priv(dev)->secy;
1984 tx_sc = &secy->tx_sc;
1986 assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1988 if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) {
1989 pr_notice("macsec: nl: add_txsa: bad key length: %d != %d\n",
1990 nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len);
1995 pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
1996 if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
1997 pr_notice("macsec: nl: add_txsa: bad pn length: %d != %d\n",
1998 nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
2004 if (!tb_sa[MACSEC_SA_ATTR_SSCI] || !tb_sa[MACSEC_SA_ATTR_SALT]) {
2009 if (nla_len(tb_sa[MACSEC_SA_ATTR_SALT]) != MACSEC_SALT_LEN) {
2010 pr_notice("macsec: nl: add_txsa: bad salt length: %d != %d\n",
2011 nla_len(tb_sa[MACSEC_SA_ATTR_SALT]),
2012 MACSEC_SA_ATTR_SALT);
2018 tx_sa = rtnl_dereference(tx_sc->sa[assoc_num]);
2024 tx_sa = kmalloc(sizeof(*tx_sa), GFP_KERNEL);
2030 err = init_tx_sa(tx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
2031 secy->key_len, secy->icv_len);
2038 spin_lock_bh(&tx_sa->lock);
2039 tx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
2040 spin_unlock_bh(&tx_sa->lock);
2042 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2043 tx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2045 was_operational = secy->operational;
2046 if (assoc_num == tx_sc->encoding_sa && tx_sa->active)
2047 secy->operational = true;
2049 /* If h/w offloading is available, propagate to the device */
2050 if (macsec_is_offloaded(netdev_priv(dev))) {
2051 const struct macsec_ops *ops;
2052 struct macsec_context ctx;
2054 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2060 ctx.sa.assoc_num = assoc_num;
2061 ctx.sa.tx_sa = tx_sa;
2063 memcpy(ctx.sa.key, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
2066 err = macsec_offload(ops->mdo_add_txsa, &ctx);
2072 tx_sa->ssci = nla_get_ssci(tb_sa[MACSEC_SA_ATTR_SSCI]);
2073 nla_memcpy(tx_sa->key.salt.bytes, tb_sa[MACSEC_SA_ATTR_SALT],
2077 nla_memcpy(tx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN);
2078 rcu_assign_pointer(tx_sc->sa[assoc_num], tx_sa);
2085 secy->operational = was_operational;
2091 static int macsec_del_rxsa(struct sk_buff *skb, struct genl_info *info)
2093 struct nlattr **attrs = info->attrs;
2094 struct net_device *dev;
2095 struct macsec_secy *secy;
2096 struct macsec_rx_sc *rx_sc;
2097 struct macsec_rx_sa *rx_sa;
2099 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2100 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2103 if (!attrs[MACSEC_ATTR_IFINDEX])
2106 if (parse_sa_config(attrs, tb_sa))
2109 if (parse_rxsc_config(attrs, tb_rxsc))
2113 rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa,
2114 &dev, &secy, &rx_sc, &assoc_num);
2115 if (IS_ERR(rx_sa)) {
2117 return PTR_ERR(rx_sa);
2120 if (rx_sa->active) {
2125 /* If h/w offloading is available, propagate to the device */
2126 if (macsec_is_offloaded(netdev_priv(dev))) {
2127 const struct macsec_ops *ops;
2128 struct macsec_context ctx;
2130 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2136 ctx.sa.assoc_num = assoc_num;
2137 ctx.sa.rx_sa = rx_sa;
2140 ret = macsec_offload(ops->mdo_del_rxsa, &ctx);
2145 RCU_INIT_POINTER(rx_sc->sa[assoc_num], NULL);
2157 static int macsec_del_rxsc(struct sk_buff *skb, struct genl_info *info)
2159 struct nlattr **attrs = info->attrs;
2160 struct net_device *dev;
2161 struct macsec_secy *secy;
2162 struct macsec_rx_sc *rx_sc;
2164 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2167 if (!attrs[MACSEC_ATTR_IFINDEX])
2170 if (parse_rxsc_config(attrs, tb_rxsc))
2173 if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI])
2177 dev = get_dev_from_nl(genl_info_net(info), info->attrs);
2180 return PTR_ERR(dev);
2183 secy = &macsec_priv(dev)->secy;
2184 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
2186 rx_sc = del_rx_sc(secy, sci);
2192 /* If h/w offloading is available, propagate to the device */
2193 if (macsec_is_offloaded(netdev_priv(dev))) {
2194 const struct macsec_ops *ops;
2195 struct macsec_context ctx;
2197 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2205 ret = macsec_offload(ops->mdo_del_rxsc, &ctx);
2220 static int macsec_del_txsa(struct sk_buff *skb, struct genl_info *info)
2222 struct nlattr **attrs = info->attrs;
2223 struct net_device *dev;
2224 struct macsec_secy *secy;
2225 struct macsec_tx_sc *tx_sc;
2226 struct macsec_tx_sa *tx_sa;
2228 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2231 if (!attrs[MACSEC_ATTR_IFINDEX])
2234 if (parse_sa_config(attrs, tb_sa))
2238 tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa,
2239 &dev, &secy, &tx_sc, &assoc_num);
2240 if (IS_ERR(tx_sa)) {
2242 return PTR_ERR(tx_sa);
2245 if (tx_sa->active) {
2250 /* If h/w offloading is available, propagate to the device */
2251 if (macsec_is_offloaded(netdev_priv(dev))) {
2252 const struct macsec_ops *ops;
2253 struct macsec_context ctx;
2255 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2261 ctx.sa.assoc_num = assoc_num;
2262 ctx.sa.tx_sa = tx_sa;
2265 ret = macsec_offload(ops->mdo_del_txsa, &ctx);
2270 RCU_INIT_POINTER(tx_sc->sa[assoc_num], NULL);
2282 static bool validate_upd_sa(struct nlattr **attrs)
2284 if (!attrs[MACSEC_SA_ATTR_AN] ||
2285 attrs[MACSEC_SA_ATTR_KEY] ||
2286 attrs[MACSEC_SA_ATTR_KEYID] ||
2287 attrs[MACSEC_SA_ATTR_SSCI] ||
2288 attrs[MACSEC_SA_ATTR_SALT])
2291 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
2294 if (attrs[MACSEC_SA_ATTR_PN] && nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0)
2297 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
2298 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
2305 static int macsec_upd_txsa(struct sk_buff *skb, struct genl_info *info)
2307 struct nlattr **attrs = info->attrs;
2308 struct net_device *dev;
2309 struct macsec_secy *secy;
2310 struct macsec_tx_sc *tx_sc;
2311 struct macsec_tx_sa *tx_sa;
2313 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2314 bool was_operational, was_active;
2320 if (!attrs[MACSEC_ATTR_IFINDEX])
2323 if (parse_sa_config(attrs, tb_sa))
2326 if (!validate_upd_sa(tb_sa))
2330 tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa,
2331 &dev, &secy, &tx_sc, &assoc_num);
2332 if (IS_ERR(tx_sa)) {
2334 return PTR_ERR(tx_sa);
2337 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2340 pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
2341 if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
2342 pr_notice("macsec: nl: upd_txsa: bad pn length: %d != %d\n",
2343 nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
2348 spin_lock_bh(&tx_sa->lock);
2349 prev_pn = tx_sa->next_pn_halves;
2350 tx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
2351 spin_unlock_bh(&tx_sa->lock);
2354 was_active = tx_sa->active;
2355 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2356 tx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2358 was_operational = secy->operational;
2359 if (assoc_num == tx_sc->encoding_sa)
2360 secy->operational = tx_sa->active;
2362 /* If h/w offloading is available, propagate to the device */
2363 if (macsec_is_offloaded(netdev_priv(dev))) {
2364 const struct macsec_ops *ops;
2365 struct macsec_context ctx;
2367 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2373 ctx.sa.assoc_num = assoc_num;
2374 ctx.sa.tx_sa = tx_sa;
2377 ret = macsec_offload(ops->mdo_upd_txsa, &ctx);
2387 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2388 spin_lock_bh(&tx_sa->lock);
2389 tx_sa->next_pn_halves = prev_pn;
2390 spin_unlock_bh(&tx_sa->lock);
2392 tx_sa->active = was_active;
2393 secy->operational = was_operational;
2398 static int macsec_upd_rxsa(struct sk_buff *skb, struct genl_info *info)
2400 struct nlattr **attrs = info->attrs;
2401 struct net_device *dev;
2402 struct macsec_secy *secy;
2403 struct macsec_rx_sc *rx_sc;
2404 struct macsec_rx_sa *rx_sa;
2406 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2407 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2414 if (!attrs[MACSEC_ATTR_IFINDEX])
2417 if (parse_rxsc_config(attrs, tb_rxsc))
2420 if (parse_sa_config(attrs, tb_sa))
2423 if (!validate_upd_sa(tb_sa))
2427 rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa,
2428 &dev, &secy, &rx_sc, &assoc_num);
2429 if (IS_ERR(rx_sa)) {
2431 return PTR_ERR(rx_sa);
2434 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2437 pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
2438 if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
2439 pr_notice("macsec: nl: upd_rxsa: bad pn length: %d != %d\n",
2440 nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
2445 spin_lock_bh(&rx_sa->lock);
2446 prev_pn = rx_sa->next_pn_halves;
2447 rx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
2448 spin_unlock_bh(&rx_sa->lock);
2451 was_active = rx_sa->active;
2452 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2453 rx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2455 /* If h/w offloading is available, propagate to the device */
2456 if (macsec_is_offloaded(netdev_priv(dev))) {
2457 const struct macsec_ops *ops;
2458 struct macsec_context ctx;
2460 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2466 ctx.sa.assoc_num = assoc_num;
2467 ctx.sa.rx_sa = rx_sa;
2470 ret = macsec_offload(ops->mdo_upd_rxsa, &ctx);
2479 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2480 spin_lock_bh(&rx_sa->lock);
2481 rx_sa->next_pn_halves = prev_pn;
2482 spin_unlock_bh(&rx_sa->lock);
2484 rx_sa->active = was_active;
2489 static int macsec_upd_rxsc(struct sk_buff *skb, struct genl_info *info)
2491 struct nlattr **attrs = info->attrs;
2492 struct net_device *dev;
2493 struct macsec_secy *secy;
2494 struct macsec_rx_sc *rx_sc;
2495 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2496 unsigned int prev_n_rx_sc;
2500 if (!attrs[MACSEC_ATTR_IFINDEX])
2503 if (parse_rxsc_config(attrs, tb_rxsc))
2506 if (!validate_add_rxsc(tb_rxsc))
2510 rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy);
2511 if (IS_ERR(rx_sc)) {
2513 return PTR_ERR(rx_sc);
2516 was_active = rx_sc->active;
2517 prev_n_rx_sc = secy->n_rx_sc;
2518 if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]) {
2519 bool new = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]);
2521 if (rx_sc->active != new)
2522 secy->n_rx_sc += new ? 1 : -1;
2524 rx_sc->active = new;
2527 /* If h/w offloading is available, propagate to the device */
2528 if (macsec_is_offloaded(netdev_priv(dev))) {
2529 const struct macsec_ops *ops;
2530 struct macsec_context ctx;
2532 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2541 ret = macsec_offload(ops->mdo_upd_rxsc, &ctx);
2551 secy->n_rx_sc = prev_n_rx_sc;
2552 rx_sc->active = was_active;
2557 static bool macsec_is_configured(struct macsec_dev *macsec)
2559 struct macsec_secy *secy = &macsec->secy;
2560 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
2563 if (secy->n_rx_sc > 0)
2566 for (i = 0; i < MACSEC_NUM_AN; i++)
2573 static int macsec_upd_offload(struct sk_buff *skb, struct genl_info *info)
2575 struct nlattr *tb_offload[MACSEC_OFFLOAD_ATTR_MAX + 1];
2576 enum macsec_offload offload, prev_offload;
2577 int (*func)(struct macsec_context *ctx);
2578 struct nlattr **attrs = info->attrs;
2579 struct net_device *dev;
2580 const struct macsec_ops *ops;
2581 struct macsec_context ctx;
2582 struct macsec_dev *macsec;
2585 if (!attrs[MACSEC_ATTR_IFINDEX])
2588 if (!attrs[MACSEC_ATTR_OFFLOAD])
2591 if (nla_parse_nested_deprecated(tb_offload, MACSEC_OFFLOAD_ATTR_MAX,
2592 attrs[MACSEC_ATTR_OFFLOAD],
2593 macsec_genl_offload_policy, NULL))
2596 dev = get_dev_from_nl(genl_info_net(info), attrs);
2598 return PTR_ERR(dev);
2599 macsec = macsec_priv(dev);
2601 if (!tb_offload[MACSEC_OFFLOAD_ATTR_TYPE])
2604 offload = nla_get_u8(tb_offload[MACSEC_OFFLOAD_ATTR_TYPE]);
2605 if (macsec->offload == offload)
2608 /* Check if the offloading mode is supported by the underlying layers */
2609 if (offload != MACSEC_OFFLOAD_OFF &&
2610 !macsec_check_offload(offload, macsec))
2613 /* Check if the net device is busy. */
2614 if (netif_running(dev))
2619 prev_offload = macsec->offload;
2620 macsec->offload = offload;
2622 /* Check if the device already has rules configured: we do not support
2625 if (macsec_is_configured(macsec)) {
2630 ops = __macsec_get_ops(offload == MACSEC_OFFLOAD_OFF ? prev_offload : offload,
2637 if (prev_offload == MACSEC_OFFLOAD_OFF)
2638 func = ops->mdo_add_secy;
2640 func = ops->mdo_del_secy;
2642 ctx.secy = &macsec->secy;
2643 ret = macsec_offload(func, &ctx);
2647 /* Force features update, since they are different for SW MACSec and
2648 * HW offloading cases.
2650 netdev_update_features(dev);
2656 macsec->offload = prev_offload;
2662 static void get_tx_sa_stats(struct net_device *dev, int an,
2663 struct macsec_tx_sa *tx_sa,
2664 struct macsec_tx_sa_stats *sum)
2666 struct macsec_dev *macsec = macsec_priv(dev);
2669 /* If h/w offloading is available, propagate to the device */
2670 if (macsec_is_offloaded(macsec)) {
2671 const struct macsec_ops *ops;
2672 struct macsec_context ctx;
2674 ops = macsec_get_ops(macsec, &ctx);
2676 ctx.sa.assoc_num = an;
2677 ctx.sa.tx_sa = tx_sa;
2678 ctx.stats.tx_sa_stats = sum;
2679 ctx.secy = &macsec_priv(dev)->secy;
2680 macsec_offload(ops->mdo_get_tx_sa_stats, &ctx);
2685 for_each_possible_cpu(cpu) {
2686 const struct macsec_tx_sa_stats *stats =
2687 per_cpu_ptr(tx_sa->stats, cpu);
2689 sum->OutPktsProtected += stats->OutPktsProtected;
2690 sum->OutPktsEncrypted += stats->OutPktsEncrypted;
2694 static int copy_tx_sa_stats(struct sk_buff *skb, struct macsec_tx_sa_stats *sum)
2696 if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_PROTECTED,
2697 sum->OutPktsProtected) ||
2698 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_ENCRYPTED,
2699 sum->OutPktsEncrypted))
2705 static void get_rx_sa_stats(struct net_device *dev,
2706 struct macsec_rx_sc *rx_sc, int an,
2707 struct macsec_rx_sa *rx_sa,
2708 struct macsec_rx_sa_stats *sum)
2710 struct macsec_dev *macsec = macsec_priv(dev);
2713 /* If h/w offloading is available, propagate to the device */
2714 if (macsec_is_offloaded(macsec)) {
2715 const struct macsec_ops *ops;
2716 struct macsec_context ctx;
2718 ops = macsec_get_ops(macsec, &ctx);
2720 ctx.sa.assoc_num = an;
2721 ctx.sa.rx_sa = rx_sa;
2722 ctx.stats.rx_sa_stats = sum;
2723 ctx.secy = &macsec_priv(dev)->secy;
2725 macsec_offload(ops->mdo_get_rx_sa_stats, &ctx);
2730 for_each_possible_cpu(cpu) {
2731 const struct macsec_rx_sa_stats *stats =
2732 per_cpu_ptr(rx_sa->stats, cpu);
2734 sum->InPktsOK += stats->InPktsOK;
2735 sum->InPktsInvalid += stats->InPktsInvalid;
2736 sum->InPktsNotValid += stats->InPktsNotValid;
2737 sum->InPktsNotUsingSA += stats->InPktsNotUsingSA;
2738 sum->InPktsUnusedSA += stats->InPktsUnusedSA;
2742 static int copy_rx_sa_stats(struct sk_buff *skb,
2743 struct macsec_rx_sa_stats *sum)
2745 if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_OK, sum->InPktsOK) ||
2746 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_INVALID,
2747 sum->InPktsInvalid) ||
2748 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_VALID,
2749 sum->InPktsNotValid) ||
2750 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_USING_SA,
2751 sum->InPktsNotUsingSA) ||
2752 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_UNUSED_SA,
2753 sum->InPktsUnusedSA))
2759 static void get_rx_sc_stats(struct net_device *dev,
2760 struct macsec_rx_sc *rx_sc,
2761 struct macsec_rx_sc_stats *sum)
2763 struct macsec_dev *macsec = macsec_priv(dev);
2766 /* If h/w offloading is available, propagate to the device */
2767 if (macsec_is_offloaded(macsec)) {
2768 const struct macsec_ops *ops;
2769 struct macsec_context ctx;
2771 ops = macsec_get_ops(macsec, &ctx);
2773 ctx.stats.rx_sc_stats = sum;
2774 ctx.secy = &macsec_priv(dev)->secy;
2776 macsec_offload(ops->mdo_get_rx_sc_stats, &ctx);
2781 for_each_possible_cpu(cpu) {
2782 const struct pcpu_rx_sc_stats *stats;
2783 struct macsec_rx_sc_stats tmp;
2786 stats = per_cpu_ptr(rx_sc->stats, cpu);
2788 start = u64_stats_fetch_begin_irq(&stats->syncp);
2789 memcpy(&tmp, &stats->stats, sizeof(tmp));
2790 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2792 sum->InOctetsValidated += tmp.InOctetsValidated;
2793 sum->InOctetsDecrypted += tmp.InOctetsDecrypted;
2794 sum->InPktsUnchecked += tmp.InPktsUnchecked;
2795 sum->InPktsDelayed += tmp.InPktsDelayed;
2796 sum->InPktsOK += tmp.InPktsOK;
2797 sum->InPktsInvalid += tmp.InPktsInvalid;
2798 sum->InPktsLate += tmp.InPktsLate;
2799 sum->InPktsNotValid += tmp.InPktsNotValid;
2800 sum->InPktsNotUsingSA += tmp.InPktsNotUsingSA;
2801 sum->InPktsUnusedSA += tmp.InPktsUnusedSA;
2805 static int copy_rx_sc_stats(struct sk_buff *skb, struct macsec_rx_sc_stats *sum)
2807 if (nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_VALIDATED,
2808 sum->InOctetsValidated,
2809 MACSEC_RXSC_STATS_ATTR_PAD) ||
2810 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_DECRYPTED,
2811 sum->InOctetsDecrypted,
2812 MACSEC_RXSC_STATS_ATTR_PAD) ||
2813 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNCHECKED,
2814 sum->InPktsUnchecked,
2815 MACSEC_RXSC_STATS_ATTR_PAD) ||
2816 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_DELAYED,
2818 MACSEC_RXSC_STATS_ATTR_PAD) ||
2819 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_OK,
2821 MACSEC_RXSC_STATS_ATTR_PAD) ||
2822 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_INVALID,
2824 MACSEC_RXSC_STATS_ATTR_PAD) ||
2825 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_LATE,
2827 MACSEC_RXSC_STATS_ATTR_PAD) ||
2828 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_VALID,
2829 sum->InPktsNotValid,
2830 MACSEC_RXSC_STATS_ATTR_PAD) ||
2831 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_USING_SA,
2832 sum->InPktsNotUsingSA,
2833 MACSEC_RXSC_STATS_ATTR_PAD) ||
2834 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNUSED_SA,
2835 sum->InPktsUnusedSA,
2836 MACSEC_RXSC_STATS_ATTR_PAD))
2842 static void get_tx_sc_stats(struct net_device *dev,
2843 struct macsec_tx_sc_stats *sum)
2845 struct macsec_dev *macsec = macsec_priv(dev);
2848 /* If h/w offloading is available, propagate to the device */
2849 if (macsec_is_offloaded(macsec)) {
2850 const struct macsec_ops *ops;
2851 struct macsec_context ctx;
2853 ops = macsec_get_ops(macsec, &ctx);
2855 ctx.stats.tx_sc_stats = sum;
2856 ctx.secy = &macsec_priv(dev)->secy;
2857 macsec_offload(ops->mdo_get_tx_sc_stats, &ctx);
2862 for_each_possible_cpu(cpu) {
2863 const struct pcpu_tx_sc_stats *stats;
2864 struct macsec_tx_sc_stats tmp;
2867 stats = per_cpu_ptr(macsec_priv(dev)->secy.tx_sc.stats, cpu);
2869 start = u64_stats_fetch_begin_irq(&stats->syncp);
2870 memcpy(&tmp, &stats->stats, sizeof(tmp));
2871 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2873 sum->OutPktsProtected += tmp.OutPktsProtected;
2874 sum->OutPktsEncrypted += tmp.OutPktsEncrypted;
2875 sum->OutOctetsProtected += tmp.OutOctetsProtected;
2876 sum->OutOctetsEncrypted += tmp.OutOctetsEncrypted;
2880 static int copy_tx_sc_stats(struct sk_buff *skb, struct macsec_tx_sc_stats *sum)
2882 if (nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_PROTECTED,
2883 sum->OutPktsProtected,
2884 MACSEC_TXSC_STATS_ATTR_PAD) ||
2885 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_ENCRYPTED,
2886 sum->OutPktsEncrypted,
2887 MACSEC_TXSC_STATS_ATTR_PAD) ||
2888 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_PROTECTED,
2889 sum->OutOctetsProtected,
2890 MACSEC_TXSC_STATS_ATTR_PAD) ||
2891 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_ENCRYPTED,
2892 sum->OutOctetsEncrypted,
2893 MACSEC_TXSC_STATS_ATTR_PAD))
2899 static void get_secy_stats(struct net_device *dev, struct macsec_dev_stats *sum)
2901 struct macsec_dev *macsec = macsec_priv(dev);
2904 /* If h/w offloading is available, propagate to the device */
2905 if (macsec_is_offloaded(macsec)) {
2906 const struct macsec_ops *ops;
2907 struct macsec_context ctx;
2909 ops = macsec_get_ops(macsec, &ctx);
2911 ctx.stats.dev_stats = sum;
2912 ctx.secy = &macsec_priv(dev)->secy;
2913 macsec_offload(ops->mdo_get_dev_stats, &ctx);
2918 for_each_possible_cpu(cpu) {
2919 const struct pcpu_secy_stats *stats;
2920 struct macsec_dev_stats tmp;
2923 stats = per_cpu_ptr(macsec_priv(dev)->stats, cpu);
2925 start = u64_stats_fetch_begin_irq(&stats->syncp);
2926 memcpy(&tmp, &stats->stats, sizeof(tmp));
2927 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2929 sum->OutPktsUntagged += tmp.OutPktsUntagged;
2930 sum->InPktsUntagged += tmp.InPktsUntagged;
2931 sum->OutPktsTooLong += tmp.OutPktsTooLong;
2932 sum->InPktsNoTag += tmp.InPktsNoTag;
2933 sum->InPktsBadTag += tmp.InPktsBadTag;
2934 sum->InPktsUnknownSCI += tmp.InPktsUnknownSCI;
2935 sum->InPktsNoSCI += tmp.InPktsNoSCI;
2936 sum->InPktsOverrun += tmp.InPktsOverrun;
2940 static int copy_secy_stats(struct sk_buff *skb, struct macsec_dev_stats *sum)
2942 if (nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_UNTAGGED,
2943 sum->OutPktsUntagged,
2944 MACSEC_SECY_STATS_ATTR_PAD) ||
2945 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNTAGGED,
2946 sum->InPktsUntagged,
2947 MACSEC_SECY_STATS_ATTR_PAD) ||
2948 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_TOO_LONG,
2949 sum->OutPktsTooLong,
2950 MACSEC_SECY_STATS_ATTR_PAD) ||
2951 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_TAG,
2953 MACSEC_SECY_STATS_ATTR_PAD) ||
2954 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_BAD_TAG,
2956 MACSEC_SECY_STATS_ATTR_PAD) ||
2957 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNKNOWN_SCI,
2958 sum->InPktsUnknownSCI,
2959 MACSEC_SECY_STATS_ATTR_PAD) ||
2960 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_SCI,
2962 MACSEC_SECY_STATS_ATTR_PAD) ||
2963 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_OVERRUN,
2965 MACSEC_SECY_STATS_ATTR_PAD))
2971 static int nla_put_secy(struct macsec_secy *secy, struct sk_buff *skb)
2973 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
2974 struct nlattr *secy_nest = nla_nest_start_noflag(skb,
2981 switch (secy->key_len) {
2982 case MACSEC_GCM_AES_128_SAK_LEN:
2983 csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_128 : MACSEC_DEFAULT_CIPHER_ID;
2985 case MACSEC_GCM_AES_256_SAK_LEN:
2986 csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_256 : MACSEC_CIPHER_ID_GCM_AES_256;
2992 if (nla_put_sci(skb, MACSEC_SECY_ATTR_SCI, secy->sci,
2993 MACSEC_SECY_ATTR_PAD) ||
2994 nla_put_u64_64bit(skb, MACSEC_SECY_ATTR_CIPHER_SUITE,
2995 csid, MACSEC_SECY_ATTR_PAD) ||
2996 nla_put_u8(skb, MACSEC_SECY_ATTR_ICV_LEN, secy->icv_len) ||
2997 nla_put_u8(skb, MACSEC_SECY_ATTR_OPER, secy->operational) ||
2998 nla_put_u8(skb, MACSEC_SECY_ATTR_PROTECT, secy->protect_frames) ||
2999 nla_put_u8(skb, MACSEC_SECY_ATTR_REPLAY, secy->replay_protect) ||
3000 nla_put_u8(skb, MACSEC_SECY_ATTR_VALIDATE, secy->validate_frames) ||
3001 nla_put_u8(skb, MACSEC_SECY_ATTR_ENCRYPT, tx_sc->encrypt) ||
3002 nla_put_u8(skb, MACSEC_SECY_ATTR_INC_SCI, tx_sc->send_sci) ||
3003 nla_put_u8(skb, MACSEC_SECY_ATTR_ES, tx_sc->end_station) ||
3004 nla_put_u8(skb, MACSEC_SECY_ATTR_SCB, tx_sc->scb) ||
3005 nla_put_u8(skb, MACSEC_SECY_ATTR_ENCODING_SA, tx_sc->encoding_sa))
3008 if (secy->replay_protect) {
3009 if (nla_put_u32(skb, MACSEC_SECY_ATTR_WINDOW, secy->replay_window))
3013 nla_nest_end(skb, secy_nest);
3017 nla_nest_cancel(skb, secy_nest);
3021 static noinline_for_stack int
3022 dump_secy(struct macsec_secy *secy, struct net_device *dev,
3023 struct sk_buff *skb, struct netlink_callback *cb)
3025 struct macsec_tx_sc_stats tx_sc_stats = {0, };
3026 struct macsec_tx_sa_stats tx_sa_stats = {0, };
3027 struct macsec_rx_sc_stats rx_sc_stats = {0, };
3028 struct macsec_rx_sa_stats rx_sa_stats = {0, };
3029 struct macsec_dev *macsec = netdev_priv(dev);
3030 struct macsec_dev_stats dev_stats = {0, };
3031 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
3032 struct nlattr *txsa_list, *rxsc_list;
3033 struct macsec_rx_sc *rx_sc;
3034 struct nlattr *attr;
3038 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
3039 &macsec_fam, NLM_F_MULTI, MACSEC_CMD_GET_TXSC);
3043 genl_dump_check_consistent(cb, hdr);
3045 if (nla_put_u32(skb, MACSEC_ATTR_IFINDEX, dev->ifindex))
3046 goto nla_put_failure;
3048 attr = nla_nest_start_noflag(skb, MACSEC_ATTR_OFFLOAD);
3050 goto nla_put_failure;
3051 if (nla_put_u8(skb, MACSEC_OFFLOAD_ATTR_TYPE, macsec->offload))
3052 goto nla_put_failure;
3053 nla_nest_end(skb, attr);
3055 if (nla_put_secy(secy, skb))
3056 goto nla_put_failure;
3058 attr = nla_nest_start_noflag(skb, MACSEC_ATTR_TXSC_STATS);
3060 goto nla_put_failure;
3062 get_tx_sc_stats(dev, &tx_sc_stats);
3063 if (copy_tx_sc_stats(skb, &tx_sc_stats)) {
3064 nla_nest_cancel(skb, attr);
3065 goto nla_put_failure;
3067 nla_nest_end(skb, attr);
3069 attr = nla_nest_start_noflag(skb, MACSEC_ATTR_SECY_STATS);
3071 goto nla_put_failure;
3072 get_secy_stats(dev, &dev_stats);
3073 if (copy_secy_stats(skb, &dev_stats)) {
3074 nla_nest_cancel(skb, attr);
3075 goto nla_put_failure;
3077 nla_nest_end(skb, attr);
3079 txsa_list = nla_nest_start_noflag(skb, MACSEC_ATTR_TXSA_LIST);
3081 goto nla_put_failure;
3082 for (i = 0, j = 1; i < MACSEC_NUM_AN; i++) {
3083 struct macsec_tx_sa *tx_sa = rtnl_dereference(tx_sc->sa[i]);
3084 struct nlattr *txsa_nest;
3091 txsa_nest = nla_nest_start_noflag(skb, j++);
3093 nla_nest_cancel(skb, txsa_list);
3094 goto nla_put_failure;
3097 attr = nla_nest_start_noflag(skb, MACSEC_SA_ATTR_STATS);
3099 nla_nest_cancel(skb, txsa_nest);
3100 nla_nest_cancel(skb, txsa_list);
3101 goto nla_put_failure;
3103 memset(&tx_sa_stats, 0, sizeof(tx_sa_stats));
3104 get_tx_sa_stats(dev, i, tx_sa, &tx_sa_stats);
3105 if (copy_tx_sa_stats(skb, &tx_sa_stats)) {
3106 nla_nest_cancel(skb, attr);
3107 nla_nest_cancel(skb, txsa_nest);
3108 nla_nest_cancel(skb, txsa_list);
3109 goto nla_put_failure;
3111 nla_nest_end(skb, attr);
3114 pn = tx_sa->next_pn;
3115 pn_len = MACSEC_XPN_PN_LEN;
3117 pn = tx_sa->next_pn_halves.lower;
3118 pn_len = MACSEC_DEFAULT_PN_LEN;
3121 if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) ||
3122 nla_put(skb, MACSEC_SA_ATTR_PN, pn_len, &pn) ||
3123 nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, tx_sa->key.id) ||
3124 (secy->xpn && nla_put_ssci(skb, MACSEC_SA_ATTR_SSCI, tx_sa->ssci)) ||
3125 nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, tx_sa->active)) {
3126 nla_nest_cancel(skb, txsa_nest);
3127 nla_nest_cancel(skb, txsa_list);
3128 goto nla_put_failure;
3131 nla_nest_end(skb, txsa_nest);
3133 nla_nest_end(skb, txsa_list);
3135 rxsc_list = nla_nest_start_noflag(skb, MACSEC_ATTR_RXSC_LIST);
3137 goto nla_put_failure;
3140 for_each_rxsc_rtnl(secy, rx_sc) {
3142 struct nlattr *rxsa_list;
3143 struct nlattr *rxsc_nest = nla_nest_start_noflag(skb, j++);
3146 nla_nest_cancel(skb, rxsc_list);
3147 goto nla_put_failure;
3150 if (nla_put_u8(skb, MACSEC_RXSC_ATTR_ACTIVE, rx_sc->active) ||
3151 nla_put_sci(skb, MACSEC_RXSC_ATTR_SCI, rx_sc->sci,
3152 MACSEC_RXSC_ATTR_PAD)) {
3153 nla_nest_cancel(skb, rxsc_nest);
3154 nla_nest_cancel(skb, rxsc_list);
3155 goto nla_put_failure;
3158 attr = nla_nest_start_noflag(skb, MACSEC_RXSC_ATTR_STATS);
3160 nla_nest_cancel(skb, rxsc_nest);
3161 nla_nest_cancel(skb, rxsc_list);
3162 goto nla_put_failure;
3164 memset(&rx_sc_stats, 0, sizeof(rx_sc_stats));
3165 get_rx_sc_stats(dev, rx_sc, &rx_sc_stats);
3166 if (copy_rx_sc_stats(skb, &rx_sc_stats)) {
3167 nla_nest_cancel(skb, attr);
3168 nla_nest_cancel(skb, rxsc_nest);
3169 nla_nest_cancel(skb, rxsc_list);
3170 goto nla_put_failure;
3172 nla_nest_end(skb, attr);
3174 rxsa_list = nla_nest_start_noflag(skb,
3175 MACSEC_RXSC_ATTR_SA_LIST);
3177 nla_nest_cancel(skb, rxsc_nest);
3178 nla_nest_cancel(skb, rxsc_list);
3179 goto nla_put_failure;
3182 for (i = 0, k = 1; i < MACSEC_NUM_AN; i++) {
3183 struct macsec_rx_sa *rx_sa = rtnl_dereference(rx_sc->sa[i]);
3184 struct nlattr *rxsa_nest;
3191 rxsa_nest = nla_nest_start_noflag(skb, k++);
3193 nla_nest_cancel(skb, rxsa_list);
3194 nla_nest_cancel(skb, rxsc_nest);
3195 nla_nest_cancel(skb, rxsc_list);
3196 goto nla_put_failure;
3199 attr = nla_nest_start_noflag(skb,
3200 MACSEC_SA_ATTR_STATS);
3202 nla_nest_cancel(skb, rxsa_list);
3203 nla_nest_cancel(skb, rxsc_nest);
3204 nla_nest_cancel(skb, rxsc_list);
3205 goto nla_put_failure;
3207 memset(&rx_sa_stats, 0, sizeof(rx_sa_stats));
3208 get_rx_sa_stats(dev, rx_sc, i, rx_sa, &rx_sa_stats);
3209 if (copy_rx_sa_stats(skb, &rx_sa_stats)) {
3210 nla_nest_cancel(skb, attr);
3211 nla_nest_cancel(skb, rxsa_list);
3212 nla_nest_cancel(skb, rxsc_nest);
3213 nla_nest_cancel(skb, rxsc_list);
3214 goto nla_put_failure;
3216 nla_nest_end(skb, attr);
3219 pn = rx_sa->next_pn;
3220 pn_len = MACSEC_XPN_PN_LEN;
3222 pn = rx_sa->next_pn_halves.lower;
3223 pn_len = MACSEC_DEFAULT_PN_LEN;
3226 if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) ||
3227 nla_put(skb, MACSEC_SA_ATTR_PN, pn_len, &pn) ||
3228 nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, rx_sa->key.id) ||
3229 (secy->xpn && nla_put_ssci(skb, MACSEC_SA_ATTR_SSCI, rx_sa->ssci)) ||
3230 nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, rx_sa->active)) {
3231 nla_nest_cancel(skb, rxsa_nest);
3232 nla_nest_cancel(skb, rxsc_nest);
3233 nla_nest_cancel(skb, rxsc_list);
3234 goto nla_put_failure;
3236 nla_nest_end(skb, rxsa_nest);
3239 nla_nest_end(skb, rxsa_list);
3240 nla_nest_end(skb, rxsc_nest);
3243 nla_nest_end(skb, rxsc_list);
3245 genlmsg_end(skb, hdr);
3250 genlmsg_cancel(skb, hdr);
3254 static int macsec_generation = 1; /* protected by RTNL */
3256 static int macsec_dump_txsc(struct sk_buff *skb, struct netlink_callback *cb)
3258 struct net *net = sock_net(skb->sk);
3259 struct net_device *dev;
3262 dev_idx = cb->args[0];
3267 cb->seq = macsec_generation;
3269 for_each_netdev(net, dev) {
3270 struct macsec_secy *secy;
3275 if (!netif_is_macsec(dev))
3278 secy = &macsec_priv(dev)->secy;
3279 if (dump_secy(secy, dev, skb, cb) < 0)
3291 static const struct genl_small_ops macsec_genl_ops[] = {
3293 .cmd = MACSEC_CMD_GET_TXSC,
3294 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3295 .dumpit = macsec_dump_txsc,
3298 .cmd = MACSEC_CMD_ADD_RXSC,
3299 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3300 .doit = macsec_add_rxsc,
3301 .flags = GENL_ADMIN_PERM,
3304 .cmd = MACSEC_CMD_DEL_RXSC,
3305 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3306 .doit = macsec_del_rxsc,
3307 .flags = GENL_ADMIN_PERM,
3310 .cmd = MACSEC_CMD_UPD_RXSC,
3311 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3312 .doit = macsec_upd_rxsc,
3313 .flags = GENL_ADMIN_PERM,
3316 .cmd = MACSEC_CMD_ADD_TXSA,
3317 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3318 .doit = macsec_add_txsa,
3319 .flags = GENL_ADMIN_PERM,
3322 .cmd = MACSEC_CMD_DEL_TXSA,
3323 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3324 .doit = macsec_del_txsa,
3325 .flags = GENL_ADMIN_PERM,
3328 .cmd = MACSEC_CMD_UPD_TXSA,
3329 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3330 .doit = macsec_upd_txsa,
3331 .flags = GENL_ADMIN_PERM,
3334 .cmd = MACSEC_CMD_ADD_RXSA,
3335 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3336 .doit = macsec_add_rxsa,
3337 .flags = GENL_ADMIN_PERM,
3340 .cmd = MACSEC_CMD_DEL_RXSA,
3341 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3342 .doit = macsec_del_rxsa,
3343 .flags = GENL_ADMIN_PERM,
3346 .cmd = MACSEC_CMD_UPD_RXSA,
3347 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3348 .doit = macsec_upd_rxsa,
3349 .flags = GENL_ADMIN_PERM,
3352 .cmd = MACSEC_CMD_UPD_OFFLOAD,
3353 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3354 .doit = macsec_upd_offload,
3355 .flags = GENL_ADMIN_PERM,
3359 static struct genl_family macsec_fam __ro_after_init = {
3360 .name = MACSEC_GENL_NAME,
3362 .version = MACSEC_GENL_VERSION,
3363 .maxattr = MACSEC_ATTR_MAX,
3364 .policy = macsec_genl_policy,
3366 .module = THIS_MODULE,
3367 .small_ops = macsec_genl_ops,
3368 .n_small_ops = ARRAY_SIZE(macsec_genl_ops),
3371 static netdev_tx_t macsec_start_xmit(struct sk_buff *skb,
3372 struct net_device *dev)
3374 struct macsec_dev *macsec = netdev_priv(dev);
3375 struct macsec_secy *secy = &macsec->secy;
3376 struct pcpu_secy_stats *secy_stats;
3379 if (macsec_is_offloaded(netdev_priv(dev))) {
3380 skb->dev = macsec->real_dev;
3381 return dev_queue_xmit(skb);
3385 if (!secy->protect_frames) {
3386 secy_stats = this_cpu_ptr(macsec->stats);
3387 u64_stats_update_begin(&secy_stats->syncp);
3388 secy_stats->stats.OutPktsUntagged++;
3389 u64_stats_update_end(&secy_stats->syncp);
3390 skb->dev = macsec->real_dev;
3392 ret = dev_queue_xmit(skb);
3393 count_tx(dev, ret, len);
3397 if (!secy->operational) {
3399 dev->stats.tx_dropped++;
3400 return NETDEV_TX_OK;
3403 skb = macsec_encrypt(skb, dev);
3405 if (PTR_ERR(skb) != -EINPROGRESS)
3406 dev->stats.tx_dropped++;
3407 return NETDEV_TX_OK;
3410 macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa);
3412 macsec_encrypt_finish(skb, dev);
3414 ret = dev_queue_xmit(skb);
3415 count_tx(dev, ret, len);
3419 #define SW_MACSEC_FEATURES \
3420 (NETIF_F_SG | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST)
3422 /* If h/w offloading is enabled, use real device features save for
3423 * VLAN_FEATURES - they require additional ops
3424 * HW_MACSEC - no reason to report it
3426 #define REAL_DEV_FEATURES(dev) \
3427 ((dev)->features & ~(NETIF_F_VLAN_FEATURES | NETIF_F_HW_MACSEC))
3429 static int macsec_dev_init(struct net_device *dev)
3431 struct macsec_dev *macsec = macsec_priv(dev);
3432 struct net_device *real_dev = macsec->real_dev;
3435 dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
3439 err = gro_cells_init(&macsec->gro_cells, dev);
3441 free_percpu(dev->tstats);
3445 if (macsec_is_offloaded(macsec)) {
3446 dev->features = REAL_DEV_FEATURES(real_dev);
3448 dev->features = real_dev->features & SW_MACSEC_FEATURES;
3449 dev->features |= NETIF_F_LLTX | NETIF_F_GSO_SOFTWARE;
3452 dev->needed_headroom = real_dev->needed_headroom +
3453 MACSEC_NEEDED_HEADROOM;
3454 dev->needed_tailroom = real_dev->needed_tailroom +
3455 MACSEC_NEEDED_TAILROOM;
3457 if (is_zero_ether_addr(dev->dev_addr))
3458 eth_hw_addr_inherit(dev, real_dev);
3459 if (is_zero_ether_addr(dev->broadcast))
3460 memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len);
3465 static void macsec_dev_uninit(struct net_device *dev)
3467 struct macsec_dev *macsec = macsec_priv(dev);
3469 gro_cells_destroy(&macsec->gro_cells);
3470 free_percpu(dev->tstats);
3473 static netdev_features_t macsec_fix_features(struct net_device *dev,
3474 netdev_features_t features)
3476 struct macsec_dev *macsec = macsec_priv(dev);
3477 struct net_device *real_dev = macsec->real_dev;
3479 if (macsec_is_offloaded(macsec))
3480 return REAL_DEV_FEATURES(real_dev);
3482 features &= (real_dev->features & SW_MACSEC_FEATURES) |
3483 NETIF_F_GSO_SOFTWARE | NETIF_F_SOFT_FEATURES;
3484 features |= NETIF_F_LLTX;
3489 static int macsec_dev_open(struct net_device *dev)
3491 struct macsec_dev *macsec = macsec_priv(dev);
3492 struct net_device *real_dev = macsec->real_dev;
3495 err = dev_uc_add(real_dev, dev->dev_addr);
3499 if (dev->flags & IFF_ALLMULTI) {
3500 err = dev_set_allmulti(real_dev, 1);
3505 if (dev->flags & IFF_PROMISC) {
3506 err = dev_set_promiscuity(real_dev, 1);
3508 goto clear_allmulti;
3511 /* If h/w offloading is available, propagate to the device */
3512 if (macsec_is_offloaded(macsec)) {
3513 const struct macsec_ops *ops;
3514 struct macsec_context ctx;
3516 ops = macsec_get_ops(netdev_priv(dev), &ctx);
3519 goto clear_allmulti;
3522 ctx.secy = &macsec->secy;
3523 err = macsec_offload(ops->mdo_dev_open, &ctx);
3525 goto clear_allmulti;
3528 if (netif_carrier_ok(real_dev))
3529 netif_carrier_on(dev);
3533 if (dev->flags & IFF_ALLMULTI)
3534 dev_set_allmulti(real_dev, -1);
3536 dev_uc_del(real_dev, dev->dev_addr);
3537 netif_carrier_off(dev);
3541 static int macsec_dev_stop(struct net_device *dev)
3543 struct macsec_dev *macsec = macsec_priv(dev);
3544 struct net_device *real_dev = macsec->real_dev;
3546 netif_carrier_off(dev);
3548 /* If h/w offloading is available, propagate to the device */
3549 if (macsec_is_offloaded(macsec)) {
3550 const struct macsec_ops *ops;
3551 struct macsec_context ctx;
3553 ops = macsec_get_ops(macsec, &ctx);
3555 ctx.secy = &macsec->secy;
3556 macsec_offload(ops->mdo_dev_stop, &ctx);
3560 dev_mc_unsync(real_dev, dev);
3561 dev_uc_unsync(real_dev, dev);
3563 if (dev->flags & IFF_ALLMULTI)
3564 dev_set_allmulti(real_dev, -1);
3566 if (dev->flags & IFF_PROMISC)
3567 dev_set_promiscuity(real_dev, -1);
3569 dev_uc_del(real_dev, dev->dev_addr);
3574 static void macsec_dev_change_rx_flags(struct net_device *dev, int change)
3576 struct net_device *real_dev = macsec_priv(dev)->real_dev;
3578 if (!(dev->flags & IFF_UP))
3581 if (change & IFF_ALLMULTI)
3582 dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1);
3584 if (change & IFF_PROMISC)
3585 dev_set_promiscuity(real_dev,
3586 dev->flags & IFF_PROMISC ? 1 : -1);
3589 static void macsec_dev_set_rx_mode(struct net_device *dev)
3591 struct net_device *real_dev = macsec_priv(dev)->real_dev;
3593 dev_mc_sync(real_dev, dev);
3594 dev_uc_sync(real_dev, dev);
3597 static int macsec_set_mac_address(struct net_device *dev, void *p)
3599 struct macsec_dev *macsec = macsec_priv(dev);
3600 struct net_device *real_dev = macsec->real_dev;
3601 struct sockaddr *addr = p;
3604 if (!is_valid_ether_addr(addr->sa_data))
3605 return -EADDRNOTAVAIL;
3607 if (!(dev->flags & IFF_UP))
3610 err = dev_uc_add(real_dev, addr->sa_data);
3614 dev_uc_del(real_dev, dev->dev_addr);
3617 eth_hw_addr_set(dev, addr->sa_data);
3618 macsec->secy.sci = dev_to_sci(dev, MACSEC_PORT_ES);
3620 /* If h/w offloading is available, propagate to the device */
3621 if (macsec_is_offloaded(macsec)) {
3622 const struct macsec_ops *ops;
3623 struct macsec_context ctx;
3625 ops = macsec_get_ops(macsec, &ctx);
3627 ctx.secy = &macsec->secy;
3628 macsec_offload(ops->mdo_upd_secy, &ctx);
3635 static int macsec_change_mtu(struct net_device *dev, int new_mtu)
3637 struct macsec_dev *macsec = macsec_priv(dev);
3638 unsigned int extra = macsec->secy.icv_len + macsec_extra_len(true);
3640 if (macsec->real_dev->mtu - extra < new_mtu)
3648 static void macsec_get_stats64(struct net_device *dev,
3649 struct rtnl_link_stats64 *s)
3654 dev_fetch_sw_netstats(s, dev->tstats);
3656 s->rx_dropped = dev->stats.rx_dropped;
3657 s->tx_dropped = dev->stats.tx_dropped;
3660 static int macsec_get_iflink(const struct net_device *dev)
3662 return macsec_priv(dev)->real_dev->ifindex;
3665 static const struct net_device_ops macsec_netdev_ops = {
3666 .ndo_init = macsec_dev_init,
3667 .ndo_uninit = macsec_dev_uninit,
3668 .ndo_open = macsec_dev_open,
3669 .ndo_stop = macsec_dev_stop,
3670 .ndo_fix_features = macsec_fix_features,
3671 .ndo_change_mtu = macsec_change_mtu,
3672 .ndo_set_rx_mode = macsec_dev_set_rx_mode,
3673 .ndo_change_rx_flags = macsec_dev_change_rx_flags,
3674 .ndo_set_mac_address = macsec_set_mac_address,
3675 .ndo_start_xmit = macsec_start_xmit,
3676 .ndo_get_stats64 = macsec_get_stats64,
3677 .ndo_get_iflink = macsec_get_iflink,
3680 static const struct device_type macsec_type = {
3684 static const struct nla_policy macsec_rtnl_policy[IFLA_MACSEC_MAX + 1] = {
3685 [IFLA_MACSEC_SCI] = { .type = NLA_U64 },
3686 [IFLA_MACSEC_PORT] = { .type = NLA_U16 },
3687 [IFLA_MACSEC_ICV_LEN] = { .type = NLA_U8 },
3688 [IFLA_MACSEC_CIPHER_SUITE] = { .type = NLA_U64 },
3689 [IFLA_MACSEC_WINDOW] = { .type = NLA_U32 },
3690 [IFLA_MACSEC_ENCODING_SA] = { .type = NLA_U8 },
3691 [IFLA_MACSEC_ENCRYPT] = { .type = NLA_U8 },
3692 [IFLA_MACSEC_PROTECT] = { .type = NLA_U8 },
3693 [IFLA_MACSEC_INC_SCI] = { .type = NLA_U8 },
3694 [IFLA_MACSEC_ES] = { .type = NLA_U8 },
3695 [IFLA_MACSEC_SCB] = { .type = NLA_U8 },
3696 [IFLA_MACSEC_REPLAY_PROTECT] = { .type = NLA_U8 },
3697 [IFLA_MACSEC_VALIDATION] = { .type = NLA_U8 },
3700 static void macsec_free_netdev(struct net_device *dev)
3702 struct macsec_dev *macsec = macsec_priv(dev);
3704 free_percpu(macsec->stats);
3705 free_percpu(macsec->secy.tx_sc.stats);
3709 static void macsec_setup(struct net_device *dev)
3713 dev->max_mtu = ETH_MAX_MTU;
3714 dev->priv_flags |= IFF_NO_QUEUE;
3715 dev->netdev_ops = &macsec_netdev_ops;
3716 dev->needs_free_netdev = true;
3717 dev->priv_destructor = macsec_free_netdev;
3718 SET_NETDEV_DEVTYPE(dev, &macsec_type);
3720 eth_zero_addr(dev->broadcast);
3723 static int macsec_changelink_common(struct net_device *dev,
3724 struct nlattr *data[])
3726 struct macsec_secy *secy;
3727 struct macsec_tx_sc *tx_sc;
3729 secy = &macsec_priv(dev)->secy;
3730 tx_sc = &secy->tx_sc;
3732 if (data[IFLA_MACSEC_ENCODING_SA]) {
3733 struct macsec_tx_sa *tx_sa;
3735 tx_sc->encoding_sa = nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]);
3736 tx_sa = rtnl_dereference(tx_sc->sa[tx_sc->encoding_sa]);
3738 secy->operational = tx_sa && tx_sa->active;
3741 if (data[IFLA_MACSEC_WINDOW])
3742 secy->replay_window = nla_get_u32(data[IFLA_MACSEC_WINDOW]);
3744 if (data[IFLA_MACSEC_ENCRYPT])
3745 tx_sc->encrypt = !!nla_get_u8(data[IFLA_MACSEC_ENCRYPT]);
3747 if (data[IFLA_MACSEC_PROTECT])
3748 secy->protect_frames = !!nla_get_u8(data[IFLA_MACSEC_PROTECT]);
3750 if (data[IFLA_MACSEC_INC_SCI])
3751 tx_sc->send_sci = !!nla_get_u8(data[IFLA_MACSEC_INC_SCI]);
3753 if (data[IFLA_MACSEC_ES])
3754 tx_sc->end_station = !!nla_get_u8(data[IFLA_MACSEC_ES]);
3756 if (data[IFLA_MACSEC_SCB])
3757 tx_sc->scb = !!nla_get_u8(data[IFLA_MACSEC_SCB]);
3759 if (data[IFLA_MACSEC_REPLAY_PROTECT])
3760 secy->replay_protect = !!nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT]);
3762 if (data[IFLA_MACSEC_VALIDATION])
3763 secy->validate_frames = nla_get_u8(data[IFLA_MACSEC_VALIDATION]);
3765 if (data[IFLA_MACSEC_CIPHER_SUITE]) {
3766 switch (nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE])) {
3767 case MACSEC_CIPHER_ID_GCM_AES_128:
3768 case MACSEC_DEFAULT_CIPHER_ID:
3769 secy->key_len = MACSEC_GCM_AES_128_SAK_LEN;
3772 case MACSEC_CIPHER_ID_GCM_AES_256:
3773 secy->key_len = MACSEC_GCM_AES_256_SAK_LEN;
3776 case MACSEC_CIPHER_ID_GCM_AES_XPN_128:
3777 secy->key_len = MACSEC_GCM_AES_128_SAK_LEN;
3780 case MACSEC_CIPHER_ID_GCM_AES_XPN_256:
3781 secy->key_len = MACSEC_GCM_AES_256_SAK_LEN;
3792 static int macsec_changelink(struct net_device *dev, struct nlattr *tb[],
3793 struct nlattr *data[],
3794 struct netlink_ext_ack *extack)
3796 struct macsec_dev *macsec = macsec_priv(dev);
3797 struct macsec_tx_sc tx_sc;
3798 struct macsec_secy secy;
3804 if (data[IFLA_MACSEC_CIPHER_SUITE] ||
3805 data[IFLA_MACSEC_ICV_LEN] ||
3806 data[IFLA_MACSEC_SCI] ||
3807 data[IFLA_MACSEC_PORT])
3810 /* Keep a copy of unmodified secy and tx_sc, in case the offload
3811 * propagation fails, to revert macsec_changelink_common.
3813 memcpy(&secy, &macsec->secy, sizeof(secy));
3814 memcpy(&tx_sc, &macsec->secy.tx_sc, sizeof(tx_sc));
3816 ret = macsec_changelink_common(dev, data);
3820 /* If h/w offloading is available, propagate to the device */
3821 if (macsec_is_offloaded(macsec)) {
3822 const struct macsec_ops *ops;
3823 struct macsec_context ctx;
3826 ops = macsec_get_ops(netdev_priv(dev), &ctx);
3832 ctx.secy = &macsec->secy;
3833 ret = macsec_offload(ops->mdo_upd_secy, &ctx);
3841 memcpy(&macsec->secy.tx_sc, &tx_sc, sizeof(tx_sc));
3842 memcpy(&macsec->secy, &secy, sizeof(secy));
3847 static void macsec_del_dev(struct macsec_dev *macsec)
3851 while (macsec->secy.rx_sc) {
3852 struct macsec_rx_sc *rx_sc = rtnl_dereference(macsec->secy.rx_sc);
3854 rcu_assign_pointer(macsec->secy.rx_sc, rx_sc->next);
3858 for (i = 0; i < MACSEC_NUM_AN; i++) {
3859 struct macsec_tx_sa *sa = rtnl_dereference(macsec->secy.tx_sc.sa[i]);
3862 RCU_INIT_POINTER(macsec->secy.tx_sc.sa[i], NULL);
3868 static void macsec_common_dellink(struct net_device *dev, struct list_head *head)
3870 struct macsec_dev *macsec = macsec_priv(dev);
3871 struct net_device *real_dev = macsec->real_dev;
3873 /* If h/w offloading is available, propagate to the device */
3874 if (macsec_is_offloaded(macsec)) {
3875 const struct macsec_ops *ops;
3876 struct macsec_context ctx;
3878 ops = macsec_get_ops(netdev_priv(dev), &ctx);
3880 ctx.secy = &macsec->secy;
3881 macsec_offload(ops->mdo_del_secy, &ctx);
3885 unregister_netdevice_queue(dev, head);
3886 list_del_rcu(&macsec->secys);
3887 macsec_del_dev(macsec);
3888 netdev_upper_dev_unlink(real_dev, dev);
3890 macsec_generation++;
3893 static void macsec_dellink(struct net_device *dev, struct list_head *head)
3895 struct macsec_dev *macsec = macsec_priv(dev);
3896 struct net_device *real_dev = macsec->real_dev;
3897 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
3899 macsec_common_dellink(dev, head);
3901 if (list_empty(&rxd->secys)) {
3902 netdev_rx_handler_unregister(real_dev);
3907 static int register_macsec_dev(struct net_device *real_dev,
3908 struct net_device *dev)
3910 struct macsec_dev *macsec = macsec_priv(dev);
3911 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
3916 rxd = kmalloc(sizeof(*rxd), GFP_KERNEL);
3920 INIT_LIST_HEAD(&rxd->secys);
3922 err = netdev_rx_handler_register(real_dev, macsec_handle_frame,
3930 list_add_tail_rcu(&macsec->secys, &rxd->secys);
3934 static bool sci_exists(struct net_device *dev, sci_t sci)
3936 struct macsec_rxh_data *rxd = macsec_data_rtnl(dev);
3937 struct macsec_dev *macsec;
3939 list_for_each_entry(macsec, &rxd->secys, secys) {
3940 if (macsec->secy.sci == sci)
3947 static int macsec_add_dev(struct net_device *dev, sci_t sci, u8 icv_len)
3949 struct macsec_dev *macsec = macsec_priv(dev);
3950 struct macsec_secy *secy = &macsec->secy;
3952 macsec->stats = netdev_alloc_pcpu_stats(struct pcpu_secy_stats);
3956 secy->tx_sc.stats = netdev_alloc_pcpu_stats(struct pcpu_tx_sc_stats);
3957 if (!secy->tx_sc.stats) {
3958 free_percpu(macsec->stats);
3962 if (sci == MACSEC_UNDEF_SCI)
3963 sci = dev_to_sci(dev, MACSEC_PORT_ES);
3966 secy->operational = true;
3967 secy->key_len = DEFAULT_SAK_LEN;
3968 secy->icv_len = icv_len;
3969 secy->validate_frames = MACSEC_VALIDATE_DEFAULT;
3970 secy->protect_frames = true;
3971 secy->replay_protect = false;
3972 secy->xpn = DEFAULT_XPN;
3975 secy->tx_sc.active = true;
3976 secy->tx_sc.encoding_sa = DEFAULT_ENCODING_SA;
3977 secy->tx_sc.encrypt = DEFAULT_ENCRYPT;
3978 secy->tx_sc.send_sci = DEFAULT_SEND_SCI;
3979 secy->tx_sc.end_station = false;
3980 secy->tx_sc.scb = false;
3985 static struct lock_class_key macsec_netdev_addr_lock_key;
3987 static int macsec_newlink(struct net *net, struct net_device *dev,
3988 struct nlattr *tb[], struct nlattr *data[],
3989 struct netlink_ext_ack *extack)
3991 struct macsec_dev *macsec = macsec_priv(dev);
3992 rx_handler_func_t *rx_handler;
3993 u8 icv_len = DEFAULT_ICV_LEN;
3994 struct net_device *real_dev;
4000 real_dev = __dev_get_by_index(net, nla_get_u32(tb[IFLA_LINK]));
4003 if (real_dev->type != ARPHRD_ETHER)
4006 dev->priv_flags |= IFF_MACSEC;
4008 macsec->real_dev = real_dev;
4010 if (data && data[IFLA_MACSEC_OFFLOAD])
4011 macsec->offload = nla_get_offload(data[IFLA_MACSEC_OFFLOAD]);
4013 /* MACsec offloading is off by default */
4014 macsec->offload = MACSEC_OFFLOAD_OFF;
4016 /* Check if the offloading mode is supported by the underlying layers */
4017 if (macsec->offload != MACSEC_OFFLOAD_OFF &&
4018 !macsec_check_offload(macsec->offload, macsec))
4021 /* send_sci must be set to true when transmit sci explicitly is set */
4022 if ((data && data[IFLA_MACSEC_SCI]) &&
4023 (data && data[IFLA_MACSEC_INC_SCI])) {
4024 u8 send_sci = !!nla_get_u8(data[IFLA_MACSEC_INC_SCI]);
4030 if (data && data[IFLA_MACSEC_ICV_LEN])
4031 icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]);
4032 mtu = real_dev->mtu - icv_len - macsec_extra_len(true);
4038 rx_handler = rtnl_dereference(real_dev->rx_handler);
4039 if (rx_handler && rx_handler != macsec_handle_frame)
4042 err = register_netdevice(dev);
4046 netdev_lockdep_set_classes(dev);
4047 lockdep_set_class(&dev->addr_list_lock,
4048 &macsec_netdev_addr_lock_key);
4050 err = netdev_upper_dev_link(real_dev, dev, extack);
4054 /* need to be already registered so that ->init has run and
4055 * the MAC addr is set
4057 if (data && data[IFLA_MACSEC_SCI])
4058 sci = nla_get_sci(data[IFLA_MACSEC_SCI]);
4059 else if (data && data[IFLA_MACSEC_PORT])
4060 sci = dev_to_sci(dev, nla_get_be16(data[IFLA_MACSEC_PORT]));
4062 sci = dev_to_sci(dev, MACSEC_PORT_ES);
4064 if (rx_handler && sci_exists(real_dev, sci)) {
4069 err = macsec_add_dev(dev, sci, icv_len);
4074 err = macsec_changelink_common(dev, data);
4079 /* If h/w offloading is available, propagate to the device */
4080 if (macsec_is_offloaded(macsec)) {
4081 const struct macsec_ops *ops;
4082 struct macsec_context ctx;
4084 ops = macsec_get_ops(macsec, &ctx);
4086 ctx.secy = &macsec->secy;
4087 err = macsec_offload(ops->mdo_add_secy, &ctx);
4093 err = register_macsec_dev(real_dev, dev);
4097 netif_stacked_transfer_operstate(real_dev, dev);
4098 linkwatch_fire_event(dev);
4100 macsec_generation++;
4105 macsec_del_dev(macsec);
4107 netdev_upper_dev_unlink(real_dev, dev);
4109 unregister_netdevice(dev);
4113 static int macsec_validate_attr(struct nlattr *tb[], struct nlattr *data[],
4114 struct netlink_ext_ack *extack)
4116 u64 csid = MACSEC_DEFAULT_CIPHER_ID;
4117 u8 icv_len = DEFAULT_ICV_LEN;
4124 if (data[IFLA_MACSEC_CIPHER_SUITE])
4125 csid = nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE]);
4127 if (data[IFLA_MACSEC_ICV_LEN]) {
4128 icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]);
4129 if (icv_len != DEFAULT_ICV_LEN) {
4130 char dummy_key[DEFAULT_SAK_LEN] = { 0 };
4131 struct crypto_aead *dummy_tfm;
4133 dummy_tfm = macsec_alloc_tfm(dummy_key,
4136 if (IS_ERR(dummy_tfm))
4137 return PTR_ERR(dummy_tfm);
4138 crypto_free_aead(dummy_tfm);
4143 case MACSEC_CIPHER_ID_GCM_AES_128:
4144 case MACSEC_CIPHER_ID_GCM_AES_256:
4145 case MACSEC_CIPHER_ID_GCM_AES_XPN_128:
4146 case MACSEC_CIPHER_ID_GCM_AES_XPN_256:
4147 case MACSEC_DEFAULT_CIPHER_ID:
4148 if (icv_len < MACSEC_MIN_ICV_LEN ||
4149 icv_len > MACSEC_STD_ICV_LEN)
4156 if (data[IFLA_MACSEC_ENCODING_SA]) {
4157 if (nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]) >= MACSEC_NUM_AN)
4161 for (flag = IFLA_MACSEC_ENCODING_SA + 1;
4162 flag < IFLA_MACSEC_VALIDATION;
4165 if (nla_get_u8(data[flag]) > 1)
4170 es = data[IFLA_MACSEC_ES] ? nla_get_u8(data[IFLA_MACSEC_ES]) : false;
4171 sci = data[IFLA_MACSEC_INC_SCI] ? nla_get_u8(data[IFLA_MACSEC_INC_SCI]) : false;
4172 scb = data[IFLA_MACSEC_SCB] ? nla_get_u8(data[IFLA_MACSEC_SCB]) : false;
4174 if ((sci && (scb || es)) || (scb && es))
4177 if (data[IFLA_MACSEC_VALIDATION] &&
4178 nla_get_u8(data[IFLA_MACSEC_VALIDATION]) > MACSEC_VALIDATE_MAX)
4181 if ((data[IFLA_MACSEC_REPLAY_PROTECT] &&
4182 nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT])) &&
4183 !data[IFLA_MACSEC_WINDOW])
4189 static struct net *macsec_get_link_net(const struct net_device *dev)
4191 return dev_net(macsec_priv(dev)->real_dev);
4194 static size_t macsec_get_size(const struct net_device *dev)
4196 return nla_total_size_64bit(8) + /* IFLA_MACSEC_SCI */
4197 nla_total_size(1) + /* IFLA_MACSEC_ICV_LEN */
4198 nla_total_size_64bit(8) + /* IFLA_MACSEC_CIPHER_SUITE */
4199 nla_total_size(4) + /* IFLA_MACSEC_WINDOW */
4200 nla_total_size(1) + /* IFLA_MACSEC_ENCODING_SA */
4201 nla_total_size(1) + /* IFLA_MACSEC_ENCRYPT */
4202 nla_total_size(1) + /* IFLA_MACSEC_PROTECT */
4203 nla_total_size(1) + /* IFLA_MACSEC_INC_SCI */
4204 nla_total_size(1) + /* IFLA_MACSEC_ES */
4205 nla_total_size(1) + /* IFLA_MACSEC_SCB */
4206 nla_total_size(1) + /* IFLA_MACSEC_REPLAY_PROTECT */
4207 nla_total_size(1) + /* IFLA_MACSEC_VALIDATION */
4211 static int macsec_fill_info(struct sk_buff *skb,
4212 const struct net_device *dev)
4214 struct macsec_secy *secy = &macsec_priv(dev)->secy;
4215 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
4218 switch (secy->key_len) {
4219 case MACSEC_GCM_AES_128_SAK_LEN:
4220 csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_128 : MACSEC_DEFAULT_CIPHER_ID;
4222 case MACSEC_GCM_AES_256_SAK_LEN:
4223 csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_256 : MACSEC_CIPHER_ID_GCM_AES_256;
4226 goto nla_put_failure;
4229 if (nla_put_sci(skb, IFLA_MACSEC_SCI, secy->sci,
4231 nla_put_u8(skb, IFLA_MACSEC_ICV_LEN, secy->icv_len) ||
4232 nla_put_u64_64bit(skb, IFLA_MACSEC_CIPHER_SUITE,
4233 csid, IFLA_MACSEC_PAD) ||
4234 nla_put_u8(skb, IFLA_MACSEC_ENCODING_SA, tx_sc->encoding_sa) ||
4235 nla_put_u8(skb, IFLA_MACSEC_ENCRYPT, tx_sc->encrypt) ||
4236 nla_put_u8(skb, IFLA_MACSEC_PROTECT, secy->protect_frames) ||
4237 nla_put_u8(skb, IFLA_MACSEC_INC_SCI, tx_sc->send_sci) ||
4238 nla_put_u8(skb, IFLA_MACSEC_ES, tx_sc->end_station) ||
4239 nla_put_u8(skb, IFLA_MACSEC_SCB, tx_sc->scb) ||
4240 nla_put_u8(skb, IFLA_MACSEC_REPLAY_PROTECT, secy->replay_protect) ||
4241 nla_put_u8(skb, IFLA_MACSEC_VALIDATION, secy->validate_frames) ||
4243 goto nla_put_failure;
4245 if (secy->replay_protect) {
4246 if (nla_put_u32(skb, IFLA_MACSEC_WINDOW, secy->replay_window))
4247 goto nla_put_failure;
4256 static struct rtnl_link_ops macsec_link_ops __read_mostly = {
4258 .priv_size = sizeof(struct macsec_dev),
4259 .maxtype = IFLA_MACSEC_MAX,
4260 .policy = macsec_rtnl_policy,
4261 .setup = macsec_setup,
4262 .validate = macsec_validate_attr,
4263 .newlink = macsec_newlink,
4264 .changelink = macsec_changelink,
4265 .dellink = macsec_dellink,
4266 .get_size = macsec_get_size,
4267 .fill_info = macsec_fill_info,
4268 .get_link_net = macsec_get_link_net,
4271 static bool is_macsec_master(struct net_device *dev)
4273 return rcu_access_pointer(dev->rx_handler) == macsec_handle_frame;
4276 static int macsec_notify(struct notifier_block *this, unsigned long event,
4279 struct net_device *real_dev = netdev_notifier_info_to_dev(ptr);
4282 if (!is_macsec_master(real_dev))
4288 case NETDEV_CHANGE: {
4289 struct macsec_dev *m, *n;
4290 struct macsec_rxh_data *rxd;
4292 rxd = macsec_data_rtnl(real_dev);
4293 list_for_each_entry_safe(m, n, &rxd->secys, secys) {
4294 struct net_device *dev = m->secy.netdev;
4296 netif_stacked_transfer_operstate(real_dev, dev);
4300 case NETDEV_UNREGISTER: {
4301 struct macsec_dev *m, *n;
4302 struct macsec_rxh_data *rxd;
4304 rxd = macsec_data_rtnl(real_dev);
4305 list_for_each_entry_safe(m, n, &rxd->secys, secys) {
4306 macsec_common_dellink(m->secy.netdev, &head);
4309 netdev_rx_handler_unregister(real_dev);
4312 unregister_netdevice_many(&head);
4315 case NETDEV_CHANGEMTU: {
4316 struct macsec_dev *m;
4317 struct macsec_rxh_data *rxd;
4319 rxd = macsec_data_rtnl(real_dev);
4320 list_for_each_entry(m, &rxd->secys, secys) {
4321 struct net_device *dev = m->secy.netdev;
4322 unsigned int mtu = real_dev->mtu - (m->secy.icv_len +
4323 macsec_extra_len(true));
4326 dev_set_mtu(dev, mtu);
4334 static struct notifier_block macsec_notifier = {
4335 .notifier_call = macsec_notify,
4338 static int __init macsec_init(void)
4342 pr_info("MACsec IEEE 802.1AE\n");
4343 err = register_netdevice_notifier(&macsec_notifier);
4347 err = rtnl_link_register(&macsec_link_ops);
4351 err = genl_register_family(&macsec_fam);
4358 rtnl_link_unregister(&macsec_link_ops);
4360 unregister_netdevice_notifier(&macsec_notifier);
4364 static void __exit macsec_exit(void)
4366 genl_unregister_family(&macsec_fam);
4367 rtnl_link_unregister(&macsec_link_ops);
4368 unregister_netdevice_notifier(&macsec_notifier);
4372 module_init(macsec_init);
4373 module_exit(macsec_exit);
4375 MODULE_ALIAS_RTNL_LINK("macsec");
4376 MODULE_ALIAS_GENL_FAMILY("macsec");
4378 MODULE_DESCRIPTION("MACsec IEEE 802.1AE");
4379 MODULE_LICENSE("GPL v2");