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 * @offload: status of offloading on the MACsec device
107 struct macsec_secy secy;
108 struct net_device *real_dev;
109 struct pcpu_secy_stats __percpu *stats;
110 struct list_head secys;
111 struct gro_cells gro_cells;
112 enum macsec_offload offload;
116 * struct macsec_rxh_data - rx_handler private argument
117 * @secys: linked list of SecY's on this underlying device
119 struct macsec_rxh_data {
120 struct list_head secys;
123 static struct macsec_dev *macsec_priv(const struct net_device *dev)
125 return (struct macsec_dev *)netdev_priv(dev);
128 static struct macsec_rxh_data *macsec_data_rcu(const struct net_device *dev)
130 return rcu_dereference_bh(dev->rx_handler_data);
133 static struct macsec_rxh_data *macsec_data_rtnl(const struct net_device *dev)
135 return rtnl_dereference(dev->rx_handler_data);
139 struct aead_request *req;
141 struct macsec_tx_sa *tx_sa;
142 struct macsec_rx_sa *rx_sa;
149 static struct macsec_rx_sa *macsec_rxsa_get(struct macsec_rx_sa __rcu *ptr)
151 struct macsec_rx_sa *sa = rcu_dereference_bh(ptr);
153 if (!sa || !sa->active)
156 if (!refcount_inc_not_zero(&sa->refcnt))
162 static void free_rx_sc_rcu(struct rcu_head *head)
164 struct macsec_rx_sc *rx_sc = container_of(head, struct macsec_rx_sc, rcu_head);
166 free_percpu(rx_sc->stats);
170 static struct macsec_rx_sc *macsec_rxsc_get(struct macsec_rx_sc *sc)
172 return refcount_inc_not_zero(&sc->refcnt) ? sc : NULL;
175 static void macsec_rxsc_put(struct macsec_rx_sc *sc)
177 if (refcount_dec_and_test(&sc->refcnt))
178 call_rcu(&sc->rcu_head, free_rx_sc_rcu);
181 static void free_rxsa(struct rcu_head *head)
183 struct macsec_rx_sa *sa = container_of(head, struct macsec_rx_sa, rcu);
185 crypto_free_aead(sa->key.tfm);
186 free_percpu(sa->stats);
190 static void macsec_rxsa_put(struct macsec_rx_sa *sa)
192 if (refcount_dec_and_test(&sa->refcnt))
193 call_rcu(&sa->rcu, free_rxsa);
196 static struct macsec_tx_sa *macsec_txsa_get(struct macsec_tx_sa __rcu *ptr)
198 struct macsec_tx_sa *sa = rcu_dereference_bh(ptr);
200 if (!sa || !sa->active)
203 if (!refcount_inc_not_zero(&sa->refcnt))
209 static void free_txsa(struct rcu_head *head)
211 struct macsec_tx_sa *sa = container_of(head, struct macsec_tx_sa, rcu);
213 crypto_free_aead(sa->key.tfm);
214 free_percpu(sa->stats);
218 static void macsec_txsa_put(struct macsec_tx_sa *sa)
220 if (refcount_dec_and_test(&sa->refcnt))
221 call_rcu(&sa->rcu, free_txsa);
224 static struct macsec_cb *macsec_skb_cb(struct sk_buff *skb)
226 BUILD_BUG_ON(sizeof(struct macsec_cb) > sizeof(skb->cb));
227 return (struct macsec_cb *)skb->cb;
230 #define MACSEC_PORT_ES (htons(0x0001))
231 #define MACSEC_PORT_SCB (0x0000)
232 #define MACSEC_UNDEF_SCI ((__force sci_t)0xffffffffffffffffULL)
233 #define MACSEC_UNDEF_SSCI ((__force ssci_t)0xffffffff)
235 #define MACSEC_GCM_AES_128_SAK_LEN 16
236 #define MACSEC_GCM_AES_256_SAK_LEN 32
238 #define DEFAULT_SAK_LEN MACSEC_GCM_AES_128_SAK_LEN
239 #define DEFAULT_XPN false
240 #define DEFAULT_SEND_SCI true
241 #define DEFAULT_ENCRYPT false
242 #define DEFAULT_ENCODING_SA 0
243 #define MACSEC_XPN_MAX_REPLAY_WINDOW (((1 << 30) - 1))
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(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 nla_get_u64(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 (tb_sa[MACSEC_SA_ATTR_PN] &&
1755 nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
1756 pr_notice("macsec: nl: add_rxsa: bad pn length: %d != %d\n",
1757 nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
1763 if (!tb_sa[MACSEC_SA_ATTR_SSCI] || !tb_sa[MACSEC_SA_ATTR_SALT]) {
1768 if (nla_len(tb_sa[MACSEC_SA_ATTR_SALT]) != MACSEC_SALT_LEN) {
1769 pr_notice("macsec: nl: add_rxsa: bad salt length: %d != %d\n",
1770 nla_len(tb_sa[MACSEC_SA_ATTR_SALT]),
1777 rx_sa = rtnl_dereference(rx_sc->sa[assoc_num]);
1783 rx_sa = kmalloc(sizeof(*rx_sa), GFP_KERNEL);
1789 err = init_rx_sa(rx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
1790 secy->key_len, secy->icv_len);
1797 if (tb_sa[MACSEC_SA_ATTR_PN]) {
1798 spin_lock_bh(&rx_sa->lock);
1799 rx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
1800 spin_unlock_bh(&rx_sa->lock);
1803 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
1804 rx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
1808 /* If h/w offloading is available, propagate to the device */
1809 if (macsec_is_offloaded(netdev_priv(dev))) {
1810 const struct macsec_ops *ops;
1811 struct macsec_context ctx;
1813 ops = macsec_get_ops(netdev_priv(dev), &ctx);
1819 ctx.sa.assoc_num = assoc_num;
1820 ctx.sa.rx_sa = rx_sa;
1822 memcpy(ctx.sa.key, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
1825 err = macsec_offload(ops->mdo_add_rxsa, &ctx);
1831 rx_sa->ssci = nla_get_ssci(tb_sa[MACSEC_SA_ATTR_SSCI]);
1832 nla_memcpy(rx_sa->key.salt.bytes, tb_sa[MACSEC_SA_ATTR_SALT],
1836 nla_memcpy(rx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN);
1837 rcu_assign_pointer(rx_sc->sa[assoc_num], rx_sa);
1844 macsec_rxsa_put(rx_sa);
1849 static bool validate_add_rxsc(struct nlattr **attrs)
1851 if (!attrs[MACSEC_RXSC_ATTR_SCI])
1854 if (attrs[MACSEC_RXSC_ATTR_ACTIVE]) {
1855 if (nla_get_u8(attrs[MACSEC_RXSC_ATTR_ACTIVE]) > 1)
1862 static int macsec_add_rxsc(struct sk_buff *skb, struct genl_info *info)
1864 struct net_device *dev;
1865 sci_t sci = MACSEC_UNDEF_SCI;
1866 struct nlattr **attrs = info->attrs;
1867 struct macsec_rx_sc *rx_sc;
1868 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1869 struct macsec_secy *secy;
1873 if (!attrs[MACSEC_ATTR_IFINDEX])
1876 if (parse_rxsc_config(attrs, tb_rxsc))
1879 if (!validate_add_rxsc(tb_rxsc))
1883 dev = get_dev_from_nl(genl_info_net(info), attrs);
1886 return PTR_ERR(dev);
1889 secy = &macsec_priv(dev)->secy;
1890 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1892 rx_sc = create_rx_sc(dev, sci);
1893 if (IS_ERR(rx_sc)) {
1895 return PTR_ERR(rx_sc);
1898 was_active = rx_sc->active;
1899 if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE])
1900 rx_sc->active = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]);
1902 if (macsec_is_offloaded(netdev_priv(dev))) {
1903 const struct macsec_ops *ops;
1904 struct macsec_context ctx;
1906 ops = macsec_get_ops(netdev_priv(dev), &ctx);
1915 ret = macsec_offload(ops->mdo_add_rxsc, &ctx);
1925 rx_sc->active = was_active;
1930 static bool validate_add_txsa(struct nlattr **attrs)
1932 if (!attrs[MACSEC_SA_ATTR_AN] ||
1933 !attrs[MACSEC_SA_ATTR_PN] ||
1934 !attrs[MACSEC_SA_ATTR_KEY] ||
1935 !attrs[MACSEC_SA_ATTR_KEYID])
1938 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
1941 if (nla_get_u64(attrs[MACSEC_SA_ATTR_PN]) == 0)
1944 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
1945 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
1949 if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN)
1955 static int macsec_add_txsa(struct sk_buff *skb, struct genl_info *info)
1957 struct net_device *dev;
1958 struct nlattr **attrs = info->attrs;
1959 struct macsec_secy *secy;
1960 struct macsec_tx_sc *tx_sc;
1961 struct macsec_tx_sa *tx_sa;
1962 unsigned char assoc_num;
1964 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1965 bool was_operational;
1968 if (!attrs[MACSEC_ATTR_IFINDEX])
1971 if (parse_sa_config(attrs, tb_sa))
1974 if (!validate_add_txsa(tb_sa))
1978 dev = get_dev_from_nl(genl_info_net(info), attrs);
1981 return PTR_ERR(dev);
1984 secy = &macsec_priv(dev)->secy;
1985 tx_sc = &secy->tx_sc;
1987 assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1989 if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) {
1990 pr_notice("macsec: nl: add_txsa: bad key length: %d != %d\n",
1991 nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len);
1996 pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
1997 if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
1998 pr_notice("macsec: nl: add_txsa: bad pn length: %d != %d\n",
1999 nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
2005 if (!tb_sa[MACSEC_SA_ATTR_SSCI] || !tb_sa[MACSEC_SA_ATTR_SALT]) {
2010 if (nla_len(tb_sa[MACSEC_SA_ATTR_SALT]) != MACSEC_SALT_LEN) {
2011 pr_notice("macsec: nl: add_txsa: bad salt length: %d != %d\n",
2012 nla_len(tb_sa[MACSEC_SA_ATTR_SALT]),
2019 tx_sa = rtnl_dereference(tx_sc->sa[assoc_num]);
2025 tx_sa = kmalloc(sizeof(*tx_sa), GFP_KERNEL);
2031 err = init_tx_sa(tx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
2032 secy->key_len, secy->icv_len);
2039 spin_lock_bh(&tx_sa->lock);
2040 tx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
2041 spin_unlock_bh(&tx_sa->lock);
2043 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2044 tx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2046 was_operational = secy->operational;
2047 if (assoc_num == tx_sc->encoding_sa && tx_sa->active)
2048 secy->operational = true;
2050 /* If h/w offloading is available, propagate to the device */
2051 if (macsec_is_offloaded(netdev_priv(dev))) {
2052 const struct macsec_ops *ops;
2053 struct macsec_context ctx;
2055 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2061 ctx.sa.assoc_num = assoc_num;
2062 ctx.sa.tx_sa = tx_sa;
2064 memcpy(ctx.sa.key, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
2067 err = macsec_offload(ops->mdo_add_txsa, &ctx);
2073 tx_sa->ssci = nla_get_ssci(tb_sa[MACSEC_SA_ATTR_SSCI]);
2074 nla_memcpy(tx_sa->key.salt.bytes, tb_sa[MACSEC_SA_ATTR_SALT],
2078 nla_memcpy(tx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN);
2079 rcu_assign_pointer(tx_sc->sa[assoc_num], tx_sa);
2086 secy->operational = was_operational;
2087 macsec_txsa_put(tx_sa);
2092 static int macsec_del_rxsa(struct sk_buff *skb, struct genl_info *info)
2094 struct nlattr **attrs = info->attrs;
2095 struct net_device *dev;
2096 struct macsec_secy *secy;
2097 struct macsec_rx_sc *rx_sc;
2098 struct macsec_rx_sa *rx_sa;
2100 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2101 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2104 if (!attrs[MACSEC_ATTR_IFINDEX])
2107 if (parse_sa_config(attrs, tb_sa))
2110 if (parse_rxsc_config(attrs, tb_rxsc))
2114 rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa,
2115 &dev, &secy, &rx_sc, &assoc_num);
2116 if (IS_ERR(rx_sa)) {
2118 return PTR_ERR(rx_sa);
2121 if (rx_sa->active) {
2126 /* If h/w offloading is available, propagate to the device */
2127 if (macsec_is_offloaded(netdev_priv(dev))) {
2128 const struct macsec_ops *ops;
2129 struct macsec_context ctx;
2131 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2137 ctx.sa.assoc_num = assoc_num;
2138 ctx.sa.rx_sa = rx_sa;
2141 ret = macsec_offload(ops->mdo_del_rxsa, &ctx);
2146 RCU_INIT_POINTER(rx_sc->sa[assoc_num], NULL);
2158 static int macsec_del_rxsc(struct sk_buff *skb, struct genl_info *info)
2160 struct nlattr **attrs = info->attrs;
2161 struct net_device *dev;
2162 struct macsec_secy *secy;
2163 struct macsec_rx_sc *rx_sc;
2165 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2168 if (!attrs[MACSEC_ATTR_IFINDEX])
2171 if (parse_rxsc_config(attrs, tb_rxsc))
2174 if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI])
2178 dev = get_dev_from_nl(genl_info_net(info), info->attrs);
2181 return PTR_ERR(dev);
2184 secy = &macsec_priv(dev)->secy;
2185 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
2187 rx_sc = del_rx_sc(secy, sci);
2193 /* If h/w offloading is available, propagate to the device */
2194 if (macsec_is_offloaded(netdev_priv(dev))) {
2195 const struct macsec_ops *ops;
2196 struct macsec_context ctx;
2198 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2206 ret = macsec_offload(ops->mdo_del_rxsc, &ctx);
2221 static int macsec_del_txsa(struct sk_buff *skb, struct genl_info *info)
2223 struct nlattr **attrs = info->attrs;
2224 struct net_device *dev;
2225 struct macsec_secy *secy;
2226 struct macsec_tx_sc *tx_sc;
2227 struct macsec_tx_sa *tx_sa;
2229 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2232 if (!attrs[MACSEC_ATTR_IFINDEX])
2235 if (parse_sa_config(attrs, tb_sa))
2239 tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa,
2240 &dev, &secy, &tx_sc, &assoc_num);
2241 if (IS_ERR(tx_sa)) {
2243 return PTR_ERR(tx_sa);
2246 if (tx_sa->active) {
2251 /* If h/w offloading is available, propagate to the device */
2252 if (macsec_is_offloaded(netdev_priv(dev))) {
2253 const struct macsec_ops *ops;
2254 struct macsec_context ctx;
2256 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2262 ctx.sa.assoc_num = assoc_num;
2263 ctx.sa.tx_sa = tx_sa;
2266 ret = macsec_offload(ops->mdo_del_txsa, &ctx);
2271 RCU_INIT_POINTER(tx_sc->sa[assoc_num], NULL);
2283 static bool validate_upd_sa(struct nlattr **attrs)
2285 if (!attrs[MACSEC_SA_ATTR_AN] ||
2286 attrs[MACSEC_SA_ATTR_KEY] ||
2287 attrs[MACSEC_SA_ATTR_KEYID] ||
2288 attrs[MACSEC_SA_ATTR_SSCI] ||
2289 attrs[MACSEC_SA_ATTR_SALT])
2292 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
2295 if (attrs[MACSEC_SA_ATTR_PN] && nla_get_u64(attrs[MACSEC_SA_ATTR_PN]) == 0)
2298 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
2299 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
2306 static int macsec_upd_txsa(struct sk_buff *skb, struct genl_info *info)
2308 struct nlattr **attrs = info->attrs;
2309 struct net_device *dev;
2310 struct macsec_secy *secy;
2311 struct macsec_tx_sc *tx_sc;
2312 struct macsec_tx_sa *tx_sa;
2314 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2315 bool was_operational, was_active;
2321 if (!attrs[MACSEC_ATTR_IFINDEX])
2324 if (parse_sa_config(attrs, tb_sa))
2327 if (!validate_upd_sa(tb_sa))
2331 tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa,
2332 &dev, &secy, &tx_sc, &assoc_num);
2333 if (IS_ERR(tx_sa)) {
2335 return PTR_ERR(tx_sa);
2338 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2341 pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
2342 if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
2343 pr_notice("macsec: nl: upd_txsa: bad pn length: %d != %d\n",
2344 nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
2349 spin_lock_bh(&tx_sa->lock);
2350 prev_pn = tx_sa->next_pn_halves;
2351 tx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
2352 spin_unlock_bh(&tx_sa->lock);
2355 was_active = tx_sa->active;
2356 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2357 tx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2359 was_operational = secy->operational;
2360 if (assoc_num == tx_sc->encoding_sa)
2361 secy->operational = tx_sa->active;
2363 /* If h/w offloading is available, propagate to the device */
2364 if (macsec_is_offloaded(netdev_priv(dev))) {
2365 const struct macsec_ops *ops;
2366 struct macsec_context ctx;
2368 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2374 ctx.sa.assoc_num = assoc_num;
2375 ctx.sa.tx_sa = tx_sa;
2378 ret = macsec_offload(ops->mdo_upd_txsa, &ctx);
2388 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2389 spin_lock_bh(&tx_sa->lock);
2390 tx_sa->next_pn_halves = prev_pn;
2391 spin_unlock_bh(&tx_sa->lock);
2393 tx_sa->active = was_active;
2394 secy->operational = was_operational;
2399 static int macsec_upd_rxsa(struct sk_buff *skb, struct genl_info *info)
2401 struct nlattr **attrs = info->attrs;
2402 struct net_device *dev;
2403 struct macsec_secy *secy;
2404 struct macsec_rx_sc *rx_sc;
2405 struct macsec_rx_sa *rx_sa;
2407 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2408 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2415 if (!attrs[MACSEC_ATTR_IFINDEX])
2418 if (parse_rxsc_config(attrs, tb_rxsc))
2421 if (parse_sa_config(attrs, tb_sa))
2424 if (!validate_upd_sa(tb_sa))
2428 rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa,
2429 &dev, &secy, &rx_sc, &assoc_num);
2430 if (IS_ERR(rx_sa)) {
2432 return PTR_ERR(rx_sa);
2435 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2438 pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
2439 if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
2440 pr_notice("macsec: nl: upd_rxsa: bad pn length: %d != %d\n",
2441 nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
2446 spin_lock_bh(&rx_sa->lock);
2447 prev_pn = rx_sa->next_pn_halves;
2448 rx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
2449 spin_unlock_bh(&rx_sa->lock);
2452 was_active = rx_sa->active;
2453 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2454 rx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2456 /* If h/w offloading is available, propagate to the device */
2457 if (macsec_is_offloaded(netdev_priv(dev))) {
2458 const struct macsec_ops *ops;
2459 struct macsec_context ctx;
2461 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2467 ctx.sa.assoc_num = assoc_num;
2468 ctx.sa.rx_sa = rx_sa;
2471 ret = macsec_offload(ops->mdo_upd_rxsa, &ctx);
2480 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2481 spin_lock_bh(&rx_sa->lock);
2482 rx_sa->next_pn_halves = prev_pn;
2483 spin_unlock_bh(&rx_sa->lock);
2485 rx_sa->active = was_active;
2490 static int macsec_upd_rxsc(struct sk_buff *skb, struct genl_info *info)
2492 struct nlattr **attrs = info->attrs;
2493 struct net_device *dev;
2494 struct macsec_secy *secy;
2495 struct macsec_rx_sc *rx_sc;
2496 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2497 unsigned int prev_n_rx_sc;
2501 if (!attrs[MACSEC_ATTR_IFINDEX])
2504 if (parse_rxsc_config(attrs, tb_rxsc))
2507 if (!validate_add_rxsc(tb_rxsc))
2511 rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy);
2512 if (IS_ERR(rx_sc)) {
2514 return PTR_ERR(rx_sc);
2517 was_active = rx_sc->active;
2518 prev_n_rx_sc = secy->n_rx_sc;
2519 if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]) {
2520 bool new = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]);
2522 if (rx_sc->active != new)
2523 secy->n_rx_sc += new ? 1 : -1;
2525 rx_sc->active = new;
2528 /* If h/w offloading is available, propagate to the device */
2529 if (macsec_is_offloaded(netdev_priv(dev))) {
2530 const struct macsec_ops *ops;
2531 struct macsec_context ctx;
2533 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2542 ret = macsec_offload(ops->mdo_upd_rxsc, &ctx);
2552 secy->n_rx_sc = prev_n_rx_sc;
2553 rx_sc->active = was_active;
2558 static bool macsec_is_configured(struct macsec_dev *macsec)
2560 struct macsec_secy *secy = &macsec->secy;
2561 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
2564 if (secy->n_rx_sc > 0)
2567 for (i = 0; i < MACSEC_NUM_AN; i++)
2574 static int macsec_upd_offload(struct sk_buff *skb, struct genl_info *info)
2576 struct nlattr *tb_offload[MACSEC_OFFLOAD_ATTR_MAX + 1];
2577 enum macsec_offload offload, prev_offload;
2578 int (*func)(struct macsec_context *ctx);
2579 struct nlattr **attrs = info->attrs;
2580 struct net_device *dev;
2581 const struct macsec_ops *ops;
2582 struct macsec_context ctx;
2583 struct macsec_dev *macsec;
2586 if (!attrs[MACSEC_ATTR_IFINDEX])
2589 if (!attrs[MACSEC_ATTR_OFFLOAD])
2592 if (nla_parse_nested_deprecated(tb_offload, MACSEC_OFFLOAD_ATTR_MAX,
2593 attrs[MACSEC_ATTR_OFFLOAD],
2594 macsec_genl_offload_policy, NULL))
2597 dev = get_dev_from_nl(genl_info_net(info), attrs);
2599 return PTR_ERR(dev);
2600 macsec = macsec_priv(dev);
2602 if (!tb_offload[MACSEC_OFFLOAD_ATTR_TYPE])
2605 offload = nla_get_u8(tb_offload[MACSEC_OFFLOAD_ATTR_TYPE]);
2606 if (macsec->offload == offload)
2609 /* Check if the offloading mode is supported by the underlying layers */
2610 if (offload != MACSEC_OFFLOAD_OFF &&
2611 !macsec_check_offload(offload, macsec))
2614 /* Check if the net device is busy. */
2615 if (netif_running(dev))
2620 prev_offload = macsec->offload;
2621 macsec->offload = offload;
2623 /* Check if the device already has rules configured: we do not support
2626 if (macsec_is_configured(macsec)) {
2631 ops = __macsec_get_ops(offload == MACSEC_OFFLOAD_OFF ? prev_offload : offload,
2638 if (prev_offload == MACSEC_OFFLOAD_OFF)
2639 func = ops->mdo_add_secy;
2641 func = ops->mdo_del_secy;
2643 ctx.secy = &macsec->secy;
2644 ret = macsec_offload(func, &ctx);
2648 /* Force features update, since they are different for SW MACSec and
2649 * HW offloading cases.
2651 netdev_update_features(dev);
2657 macsec->offload = prev_offload;
2663 static void get_tx_sa_stats(struct net_device *dev, int an,
2664 struct macsec_tx_sa *tx_sa,
2665 struct macsec_tx_sa_stats *sum)
2667 struct macsec_dev *macsec = macsec_priv(dev);
2670 /* If h/w offloading is available, propagate to the device */
2671 if (macsec_is_offloaded(macsec)) {
2672 const struct macsec_ops *ops;
2673 struct macsec_context ctx;
2675 ops = macsec_get_ops(macsec, &ctx);
2677 ctx.sa.assoc_num = an;
2678 ctx.sa.tx_sa = tx_sa;
2679 ctx.stats.tx_sa_stats = sum;
2680 ctx.secy = &macsec_priv(dev)->secy;
2681 macsec_offload(ops->mdo_get_tx_sa_stats, &ctx);
2686 for_each_possible_cpu(cpu) {
2687 const struct macsec_tx_sa_stats *stats =
2688 per_cpu_ptr(tx_sa->stats, cpu);
2690 sum->OutPktsProtected += stats->OutPktsProtected;
2691 sum->OutPktsEncrypted += stats->OutPktsEncrypted;
2695 static int copy_tx_sa_stats(struct sk_buff *skb, struct macsec_tx_sa_stats *sum)
2697 if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_PROTECTED,
2698 sum->OutPktsProtected) ||
2699 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_ENCRYPTED,
2700 sum->OutPktsEncrypted))
2706 static void get_rx_sa_stats(struct net_device *dev,
2707 struct macsec_rx_sc *rx_sc, int an,
2708 struct macsec_rx_sa *rx_sa,
2709 struct macsec_rx_sa_stats *sum)
2711 struct macsec_dev *macsec = macsec_priv(dev);
2714 /* If h/w offloading is available, propagate to the device */
2715 if (macsec_is_offloaded(macsec)) {
2716 const struct macsec_ops *ops;
2717 struct macsec_context ctx;
2719 ops = macsec_get_ops(macsec, &ctx);
2721 ctx.sa.assoc_num = an;
2722 ctx.sa.rx_sa = rx_sa;
2723 ctx.stats.rx_sa_stats = sum;
2724 ctx.secy = &macsec_priv(dev)->secy;
2726 macsec_offload(ops->mdo_get_rx_sa_stats, &ctx);
2731 for_each_possible_cpu(cpu) {
2732 const struct macsec_rx_sa_stats *stats =
2733 per_cpu_ptr(rx_sa->stats, cpu);
2735 sum->InPktsOK += stats->InPktsOK;
2736 sum->InPktsInvalid += stats->InPktsInvalid;
2737 sum->InPktsNotValid += stats->InPktsNotValid;
2738 sum->InPktsNotUsingSA += stats->InPktsNotUsingSA;
2739 sum->InPktsUnusedSA += stats->InPktsUnusedSA;
2743 static int copy_rx_sa_stats(struct sk_buff *skb,
2744 struct macsec_rx_sa_stats *sum)
2746 if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_OK, sum->InPktsOK) ||
2747 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_INVALID,
2748 sum->InPktsInvalid) ||
2749 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_VALID,
2750 sum->InPktsNotValid) ||
2751 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_USING_SA,
2752 sum->InPktsNotUsingSA) ||
2753 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_UNUSED_SA,
2754 sum->InPktsUnusedSA))
2760 static void get_rx_sc_stats(struct net_device *dev,
2761 struct macsec_rx_sc *rx_sc,
2762 struct macsec_rx_sc_stats *sum)
2764 struct macsec_dev *macsec = macsec_priv(dev);
2767 /* If h/w offloading is available, propagate to the device */
2768 if (macsec_is_offloaded(macsec)) {
2769 const struct macsec_ops *ops;
2770 struct macsec_context ctx;
2772 ops = macsec_get_ops(macsec, &ctx);
2774 ctx.stats.rx_sc_stats = sum;
2775 ctx.secy = &macsec_priv(dev)->secy;
2777 macsec_offload(ops->mdo_get_rx_sc_stats, &ctx);
2782 for_each_possible_cpu(cpu) {
2783 const struct pcpu_rx_sc_stats *stats;
2784 struct macsec_rx_sc_stats tmp;
2787 stats = per_cpu_ptr(rx_sc->stats, cpu);
2789 start = u64_stats_fetch_begin_irq(&stats->syncp);
2790 memcpy(&tmp, &stats->stats, sizeof(tmp));
2791 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2793 sum->InOctetsValidated += tmp.InOctetsValidated;
2794 sum->InOctetsDecrypted += tmp.InOctetsDecrypted;
2795 sum->InPktsUnchecked += tmp.InPktsUnchecked;
2796 sum->InPktsDelayed += tmp.InPktsDelayed;
2797 sum->InPktsOK += tmp.InPktsOK;
2798 sum->InPktsInvalid += tmp.InPktsInvalid;
2799 sum->InPktsLate += tmp.InPktsLate;
2800 sum->InPktsNotValid += tmp.InPktsNotValid;
2801 sum->InPktsNotUsingSA += tmp.InPktsNotUsingSA;
2802 sum->InPktsUnusedSA += tmp.InPktsUnusedSA;
2806 static int copy_rx_sc_stats(struct sk_buff *skb, struct macsec_rx_sc_stats *sum)
2808 if (nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_VALIDATED,
2809 sum->InOctetsValidated,
2810 MACSEC_RXSC_STATS_ATTR_PAD) ||
2811 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_DECRYPTED,
2812 sum->InOctetsDecrypted,
2813 MACSEC_RXSC_STATS_ATTR_PAD) ||
2814 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNCHECKED,
2815 sum->InPktsUnchecked,
2816 MACSEC_RXSC_STATS_ATTR_PAD) ||
2817 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_DELAYED,
2819 MACSEC_RXSC_STATS_ATTR_PAD) ||
2820 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_OK,
2822 MACSEC_RXSC_STATS_ATTR_PAD) ||
2823 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_INVALID,
2825 MACSEC_RXSC_STATS_ATTR_PAD) ||
2826 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_LATE,
2828 MACSEC_RXSC_STATS_ATTR_PAD) ||
2829 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_VALID,
2830 sum->InPktsNotValid,
2831 MACSEC_RXSC_STATS_ATTR_PAD) ||
2832 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_USING_SA,
2833 sum->InPktsNotUsingSA,
2834 MACSEC_RXSC_STATS_ATTR_PAD) ||
2835 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNUSED_SA,
2836 sum->InPktsUnusedSA,
2837 MACSEC_RXSC_STATS_ATTR_PAD))
2843 static void get_tx_sc_stats(struct net_device *dev,
2844 struct macsec_tx_sc_stats *sum)
2846 struct macsec_dev *macsec = macsec_priv(dev);
2849 /* If h/w offloading is available, propagate to the device */
2850 if (macsec_is_offloaded(macsec)) {
2851 const struct macsec_ops *ops;
2852 struct macsec_context ctx;
2854 ops = macsec_get_ops(macsec, &ctx);
2856 ctx.stats.tx_sc_stats = sum;
2857 ctx.secy = &macsec_priv(dev)->secy;
2858 macsec_offload(ops->mdo_get_tx_sc_stats, &ctx);
2863 for_each_possible_cpu(cpu) {
2864 const struct pcpu_tx_sc_stats *stats;
2865 struct macsec_tx_sc_stats tmp;
2868 stats = per_cpu_ptr(macsec_priv(dev)->secy.tx_sc.stats, cpu);
2870 start = u64_stats_fetch_begin_irq(&stats->syncp);
2871 memcpy(&tmp, &stats->stats, sizeof(tmp));
2872 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2874 sum->OutPktsProtected += tmp.OutPktsProtected;
2875 sum->OutPktsEncrypted += tmp.OutPktsEncrypted;
2876 sum->OutOctetsProtected += tmp.OutOctetsProtected;
2877 sum->OutOctetsEncrypted += tmp.OutOctetsEncrypted;
2881 static int copy_tx_sc_stats(struct sk_buff *skb, struct macsec_tx_sc_stats *sum)
2883 if (nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_PROTECTED,
2884 sum->OutPktsProtected,
2885 MACSEC_TXSC_STATS_ATTR_PAD) ||
2886 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_ENCRYPTED,
2887 sum->OutPktsEncrypted,
2888 MACSEC_TXSC_STATS_ATTR_PAD) ||
2889 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_PROTECTED,
2890 sum->OutOctetsProtected,
2891 MACSEC_TXSC_STATS_ATTR_PAD) ||
2892 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_ENCRYPTED,
2893 sum->OutOctetsEncrypted,
2894 MACSEC_TXSC_STATS_ATTR_PAD))
2900 static void get_secy_stats(struct net_device *dev, struct macsec_dev_stats *sum)
2902 struct macsec_dev *macsec = macsec_priv(dev);
2905 /* If h/w offloading is available, propagate to the device */
2906 if (macsec_is_offloaded(macsec)) {
2907 const struct macsec_ops *ops;
2908 struct macsec_context ctx;
2910 ops = macsec_get_ops(macsec, &ctx);
2912 ctx.stats.dev_stats = sum;
2913 ctx.secy = &macsec_priv(dev)->secy;
2914 macsec_offload(ops->mdo_get_dev_stats, &ctx);
2919 for_each_possible_cpu(cpu) {
2920 const struct pcpu_secy_stats *stats;
2921 struct macsec_dev_stats tmp;
2924 stats = per_cpu_ptr(macsec_priv(dev)->stats, cpu);
2926 start = u64_stats_fetch_begin_irq(&stats->syncp);
2927 memcpy(&tmp, &stats->stats, sizeof(tmp));
2928 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2930 sum->OutPktsUntagged += tmp.OutPktsUntagged;
2931 sum->InPktsUntagged += tmp.InPktsUntagged;
2932 sum->OutPktsTooLong += tmp.OutPktsTooLong;
2933 sum->InPktsNoTag += tmp.InPktsNoTag;
2934 sum->InPktsBadTag += tmp.InPktsBadTag;
2935 sum->InPktsUnknownSCI += tmp.InPktsUnknownSCI;
2936 sum->InPktsNoSCI += tmp.InPktsNoSCI;
2937 sum->InPktsOverrun += tmp.InPktsOverrun;
2941 static int copy_secy_stats(struct sk_buff *skb, struct macsec_dev_stats *sum)
2943 if (nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_UNTAGGED,
2944 sum->OutPktsUntagged,
2945 MACSEC_SECY_STATS_ATTR_PAD) ||
2946 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNTAGGED,
2947 sum->InPktsUntagged,
2948 MACSEC_SECY_STATS_ATTR_PAD) ||
2949 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_TOO_LONG,
2950 sum->OutPktsTooLong,
2951 MACSEC_SECY_STATS_ATTR_PAD) ||
2952 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_TAG,
2954 MACSEC_SECY_STATS_ATTR_PAD) ||
2955 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_BAD_TAG,
2957 MACSEC_SECY_STATS_ATTR_PAD) ||
2958 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNKNOWN_SCI,
2959 sum->InPktsUnknownSCI,
2960 MACSEC_SECY_STATS_ATTR_PAD) ||
2961 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_SCI,
2963 MACSEC_SECY_STATS_ATTR_PAD) ||
2964 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_OVERRUN,
2966 MACSEC_SECY_STATS_ATTR_PAD))
2972 static int nla_put_secy(struct macsec_secy *secy, struct sk_buff *skb)
2974 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
2975 struct nlattr *secy_nest = nla_nest_start_noflag(skb,
2982 switch (secy->key_len) {
2983 case MACSEC_GCM_AES_128_SAK_LEN:
2984 csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_128 : MACSEC_DEFAULT_CIPHER_ID;
2986 case MACSEC_GCM_AES_256_SAK_LEN:
2987 csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_256 : MACSEC_CIPHER_ID_GCM_AES_256;
2993 if (nla_put_sci(skb, MACSEC_SECY_ATTR_SCI, secy->sci,
2994 MACSEC_SECY_ATTR_PAD) ||
2995 nla_put_u64_64bit(skb, MACSEC_SECY_ATTR_CIPHER_SUITE,
2996 csid, MACSEC_SECY_ATTR_PAD) ||
2997 nla_put_u8(skb, MACSEC_SECY_ATTR_ICV_LEN, secy->icv_len) ||
2998 nla_put_u8(skb, MACSEC_SECY_ATTR_OPER, secy->operational) ||
2999 nla_put_u8(skb, MACSEC_SECY_ATTR_PROTECT, secy->protect_frames) ||
3000 nla_put_u8(skb, MACSEC_SECY_ATTR_REPLAY, secy->replay_protect) ||
3001 nla_put_u8(skb, MACSEC_SECY_ATTR_VALIDATE, secy->validate_frames) ||
3002 nla_put_u8(skb, MACSEC_SECY_ATTR_ENCRYPT, tx_sc->encrypt) ||
3003 nla_put_u8(skb, MACSEC_SECY_ATTR_INC_SCI, tx_sc->send_sci) ||
3004 nla_put_u8(skb, MACSEC_SECY_ATTR_ES, tx_sc->end_station) ||
3005 nla_put_u8(skb, MACSEC_SECY_ATTR_SCB, tx_sc->scb) ||
3006 nla_put_u8(skb, MACSEC_SECY_ATTR_ENCODING_SA, tx_sc->encoding_sa))
3009 if (secy->replay_protect) {
3010 if (nla_put_u32(skb, MACSEC_SECY_ATTR_WINDOW, secy->replay_window))
3014 nla_nest_end(skb, secy_nest);
3018 nla_nest_cancel(skb, secy_nest);
3022 static noinline_for_stack int
3023 dump_secy(struct macsec_secy *secy, struct net_device *dev,
3024 struct sk_buff *skb, struct netlink_callback *cb)
3026 struct macsec_tx_sc_stats tx_sc_stats = {0, };
3027 struct macsec_tx_sa_stats tx_sa_stats = {0, };
3028 struct macsec_rx_sc_stats rx_sc_stats = {0, };
3029 struct macsec_rx_sa_stats rx_sa_stats = {0, };
3030 struct macsec_dev *macsec = netdev_priv(dev);
3031 struct macsec_dev_stats dev_stats = {0, };
3032 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
3033 struct nlattr *txsa_list, *rxsc_list;
3034 struct macsec_rx_sc *rx_sc;
3035 struct nlattr *attr;
3039 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
3040 &macsec_fam, NLM_F_MULTI, MACSEC_CMD_GET_TXSC);
3044 genl_dump_check_consistent(cb, hdr);
3046 if (nla_put_u32(skb, MACSEC_ATTR_IFINDEX, dev->ifindex))
3047 goto nla_put_failure;
3049 attr = nla_nest_start_noflag(skb, MACSEC_ATTR_OFFLOAD);
3051 goto nla_put_failure;
3052 if (nla_put_u8(skb, MACSEC_OFFLOAD_ATTR_TYPE, macsec->offload))
3053 goto nla_put_failure;
3054 nla_nest_end(skb, attr);
3056 if (nla_put_secy(secy, skb))
3057 goto nla_put_failure;
3059 attr = nla_nest_start_noflag(skb, MACSEC_ATTR_TXSC_STATS);
3061 goto nla_put_failure;
3063 get_tx_sc_stats(dev, &tx_sc_stats);
3064 if (copy_tx_sc_stats(skb, &tx_sc_stats)) {
3065 nla_nest_cancel(skb, attr);
3066 goto nla_put_failure;
3068 nla_nest_end(skb, attr);
3070 attr = nla_nest_start_noflag(skb, MACSEC_ATTR_SECY_STATS);
3072 goto nla_put_failure;
3073 get_secy_stats(dev, &dev_stats);
3074 if (copy_secy_stats(skb, &dev_stats)) {
3075 nla_nest_cancel(skb, attr);
3076 goto nla_put_failure;
3078 nla_nest_end(skb, attr);
3080 txsa_list = nla_nest_start_noflag(skb, MACSEC_ATTR_TXSA_LIST);
3082 goto nla_put_failure;
3083 for (i = 0, j = 1; i < MACSEC_NUM_AN; i++) {
3084 struct macsec_tx_sa *tx_sa = rtnl_dereference(tx_sc->sa[i]);
3085 struct nlattr *txsa_nest;
3092 txsa_nest = nla_nest_start_noflag(skb, j++);
3094 nla_nest_cancel(skb, txsa_list);
3095 goto nla_put_failure;
3098 attr = nla_nest_start_noflag(skb, MACSEC_SA_ATTR_STATS);
3100 nla_nest_cancel(skb, txsa_nest);
3101 nla_nest_cancel(skb, txsa_list);
3102 goto nla_put_failure;
3104 memset(&tx_sa_stats, 0, sizeof(tx_sa_stats));
3105 get_tx_sa_stats(dev, i, tx_sa, &tx_sa_stats);
3106 if (copy_tx_sa_stats(skb, &tx_sa_stats)) {
3107 nla_nest_cancel(skb, attr);
3108 nla_nest_cancel(skb, txsa_nest);
3109 nla_nest_cancel(skb, txsa_list);
3110 goto nla_put_failure;
3112 nla_nest_end(skb, attr);
3115 pn = tx_sa->next_pn;
3116 pn_len = MACSEC_XPN_PN_LEN;
3118 pn = tx_sa->next_pn_halves.lower;
3119 pn_len = MACSEC_DEFAULT_PN_LEN;
3122 if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) ||
3123 nla_put(skb, MACSEC_SA_ATTR_PN, pn_len, &pn) ||
3124 nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, tx_sa->key.id) ||
3125 (secy->xpn && nla_put_ssci(skb, MACSEC_SA_ATTR_SSCI, tx_sa->ssci)) ||
3126 nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, tx_sa->active)) {
3127 nla_nest_cancel(skb, txsa_nest);
3128 nla_nest_cancel(skb, txsa_list);
3129 goto nla_put_failure;
3132 nla_nest_end(skb, txsa_nest);
3134 nla_nest_end(skb, txsa_list);
3136 rxsc_list = nla_nest_start_noflag(skb, MACSEC_ATTR_RXSC_LIST);
3138 goto nla_put_failure;
3141 for_each_rxsc_rtnl(secy, rx_sc) {
3143 struct nlattr *rxsa_list;
3144 struct nlattr *rxsc_nest = nla_nest_start_noflag(skb, j++);
3147 nla_nest_cancel(skb, rxsc_list);
3148 goto nla_put_failure;
3151 if (nla_put_u8(skb, MACSEC_RXSC_ATTR_ACTIVE, rx_sc->active) ||
3152 nla_put_sci(skb, MACSEC_RXSC_ATTR_SCI, rx_sc->sci,
3153 MACSEC_RXSC_ATTR_PAD)) {
3154 nla_nest_cancel(skb, rxsc_nest);
3155 nla_nest_cancel(skb, rxsc_list);
3156 goto nla_put_failure;
3159 attr = nla_nest_start_noflag(skb, MACSEC_RXSC_ATTR_STATS);
3161 nla_nest_cancel(skb, rxsc_nest);
3162 nla_nest_cancel(skb, rxsc_list);
3163 goto nla_put_failure;
3165 memset(&rx_sc_stats, 0, sizeof(rx_sc_stats));
3166 get_rx_sc_stats(dev, rx_sc, &rx_sc_stats);
3167 if (copy_rx_sc_stats(skb, &rx_sc_stats)) {
3168 nla_nest_cancel(skb, attr);
3169 nla_nest_cancel(skb, rxsc_nest);
3170 nla_nest_cancel(skb, rxsc_list);
3171 goto nla_put_failure;
3173 nla_nest_end(skb, attr);
3175 rxsa_list = nla_nest_start_noflag(skb,
3176 MACSEC_RXSC_ATTR_SA_LIST);
3178 nla_nest_cancel(skb, rxsc_nest);
3179 nla_nest_cancel(skb, rxsc_list);
3180 goto nla_put_failure;
3183 for (i = 0, k = 1; i < MACSEC_NUM_AN; i++) {
3184 struct macsec_rx_sa *rx_sa = rtnl_dereference(rx_sc->sa[i]);
3185 struct nlattr *rxsa_nest;
3192 rxsa_nest = nla_nest_start_noflag(skb, k++);
3194 nla_nest_cancel(skb, rxsa_list);
3195 nla_nest_cancel(skb, rxsc_nest);
3196 nla_nest_cancel(skb, rxsc_list);
3197 goto nla_put_failure;
3200 attr = nla_nest_start_noflag(skb,
3201 MACSEC_SA_ATTR_STATS);
3203 nla_nest_cancel(skb, rxsa_list);
3204 nla_nest_cancel(skb, rxsc_nest);
3205 nla_nest_cancel(skb, rxsc_list);
3206 goto nla_put_failure;
3208 memset(&rx_sa_stats, 0, sizeof(rx_sa_stats));
3209 get_rx_sa_stats(dev, rx_sc, i, rx_sa, &rx_sa_stats);
3210 if (copy_rx_sa_stats(skb, &rx_sa_stats)) {
3211 nla_nest_cancel(skb, attr);
3212 nla_nest_cancel(skb, rxsa_list);
3213 nla_nest_cancel(skb, rxsc_nest);
3214 nla_nest_cancel(skb, rxsc_list);
3215 goto nla_put_failure;
3217 nla_nest_end(skb, attr);
3220 pn = rx_sa->next_pn;
3221 pn_len = MACSEC_XPN_PN_LEN;
3223 pn = rx_sa->next_pn_halves.lower;
3224 pn_len = MACSEC_DEFAULT_PN_LEN;
3227 if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) ||
3228 nla_put(skb, MACSEC_SA_ATTR_PN, pn_len, &pn) ||
3229 nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, rx_sa->key.id) ||
3230 (secy->xpn && nla_put_ssci(skb, MACSEC_SA_ATTR_SSCI, rx_sa->ssci)) ||
3231 nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, rx_sa->active)) {
3232 nla_nest_cancel(skb, rxsa_nest);
3233 nla_nest_cancel(skb, rxsc_nest);
3234 nla_nest_cancel(skb, rxsc_list);
3235 goto nla_put_failure;
3237 nla_nest_end(skb, rxsa_nest);
3240 nla_nest_end(skb, rxsa_list);
3241 nla_nest_end(skb, rxsc_nest);
3244 nla_nest_end(skb, rxsc_list);
3246 genlmsg_end(skb, hdr);
3251 genlmsg_cancel(skb, hdr);
3255 static int macsec_generation = 1; /* protected by RTNL */
3257 static int macsec_dump_txsc(struct sk_buff *skb, struct netlink_callback *cb)
3259 struct net *net = sock_net(skb->sk);
3260 struct net_device *dev;
3263 dev_idx = cb->args[0];
3268 cb->seq = macsec_generation;
3270 for_each_netdev(net, dev) {
3271 struct macsec_secy *secy;
3276 if (!netif_is_macsec(dev))
3279 secy = &macsec_priv(dev)->secy;
3280 if (dump_secy(secy, dev, skb, cb) < 0)
3292 static const struct genl_small_ops macsec_genl_ops[] = {
3294 .cmd = MACSEC_CMD_GET_TXSC,
3295 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3296 .dumpit = macsec_dump_txsc,
3299 .cmd = MACSEC_CMD_ADD_RXSC,
3300 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3301 .doit = macsec_add_rxsc,
3302 .flags = GENL_ADMIN_PERM,
3305 .cmd = MACSEC_CMD_DEL_RXSC,
3306 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3307 .doit = macsec_del_rxsc,
3308 .flags = GENL_ADMIN_PERM,
3311 .cmd = MACSEC_CMD_UPD_RXSC,
3312 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3313 .doit = macsec_upd_rxsc,
3314 .flags = GENL_ADMIN_PERM,
3317 .cmd = MACSEC_CMD_ADD_TXSA,
3318 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3319 .doit = macsec_add_txsa,
3320 .flags = GENL_ADMIN_PERM,
3323 .cmd = MACSEC_CMD_DEL_TXSA,
3324 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3325 .doit = macsec_del_txsa,
3326 .flags = GENL_ADMIN_PERM,
3329 .cmd = MACSEC_CMD_UPD_TXSA,
3330 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3331 .doit = macsec_upd_txsa,
3332 .flags = GENL_ADMIN_PERM,
3335 .cmd = MACSEC_CMD_ADD_RXSA,
3336 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3337 .doit = macsec_add_rxsa,
3338 .flags = GENL_ADMIN_PERM,
3341 .cmd = MACSEC_CMD_DEL_RXSA,
3342 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3343 .doit = macsec_del_rxsa,
3344 .flags = GENL_ADMIN_PERM,
3347 .cmd = MACSEC_CMD_UPD_RXSA,
3348 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3349 .doit = macsec_upd_rxsa,
3350 .flags = GENL_ADMIN_PERM,
3353 .cmd = MACSEC_CMD_UPD_OFFLOAD,
3354 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3355 .doit = macsec_upd_offload,
3356 .flags = GENL_ADMIN_PERM,
3360 static struct genl_family macsec_fam __ro_after_init = {
3361 .name = MACSEC_GENL_NAME,
3363 .version = MACSEC_GENL_VERSION,
3364 .maxattr = MACSEC_ATTR_MAX,
3365 .policy = macsec_genl_policy,
3367 .module = THIS_MODULE,
3368 .small_ops = macsec_genl_ops,
3369 .n_small_ops = ARRAY_SIZE(macsec_genl_ops),
3372 static netdev_tx_t macsec_start_xmit(struct sk_buff *skb,
3373 struct net_device *dev)
3375 struct macsec_dev *macsec = netdev_priv(dev);
3376 struct macsec_secy *secy = &macsec->secy;
3377 struct pcpu_secy_stats *secy_stats;
3380 if (macsec_is_offloaded(netdev_priv(dev))) {
3381 skb->dev = macsec->real_dev;
3382 return dev_queue_xmit(skb);
3386 if (!secy->protect_frames) {
3387 secy_stats = this_cpu_ptr(macsec->stats);
3388 u64_stats_update_begin(&secy_stats->syncp);
3389 secy_stats->stats.OutPktsUntagged++;
3390 u64_stats_update_end(&secy_stats->syncp);
3391 skb->dev = macsec->real_dev;
3393 ret = dev_queue_xmit(skb);
3394 count_tx(dev, ret, len);
3398 if (!secy->operational) {
3400 dev->stats.tx_dropped++;
3401 return NETDEV_TX_OK;
3404 skb = macsec_encrypt(skb, dev);
3406 if (PTR_ERR(skb) != -EINPROGRESS)
3407 dev->stats.tx_dropped++;
3408 return NETDEV_TX_OK;
3411 macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa);
3413 macsec_encrypt_finish(skb, dev);
3415 ret = dev_queue_xmit(skb);
3416 count_tx(dev, ret, len);
3420 #define SW_MACSEC_FEATURES \
3421 (NETIF_F_SG | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST)
3423 /* If h/w offloading is enabled, use real device features save for
3424 * VLAN_FEATURES - they require additional ops
3425 * HW_MACSEC - no reason to report it
3427 #define REAL_DEV_FEATURES(dev) \
3428 ((dev)->features & ~(NETIF_F_VLAN_FEATURES | NETIF_F_HW_MACSEC))
3430 static int macsec_dev_init(struct net_device *dev)
3432 struct macsec_dev *macsec = macsec_priv(dev);
3433 struct net_device *real_dev = macsec->real_dev;
3436 dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
3440 err = gro_cells_init(&macsec->gro_cells, dev);
3442 free_percpu(dev->tstats);
3446 if (macsec_is_offloaded(macsec)) {
3447 dev->features = REAL_DEV_FEATURES(real_dev);
3449 dev->features = real_dev->features & SW_MACSEC_FEATURES;
3450 dev->features |= NETIF_F_LLTX | NETIF_F_GSO_SOFTWARE;
3453 dev->needed_headroom = real_dev->needed_headroom +
3454 MACSEC_NEEDED_HEADROOM;
3455 dev->needed_tailroom = real_dev->needed_tailroom +
3456 MACSEC_NEEDED_TAILROOM;
3458 if (is_zero_ether_addr(dev->dev_addr))
3459 eth_hw_addr_inherit(dev, real_dev);
3460 if (is_zero_ether_addr(dev->broadcast))
3461 memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len);
3466 static void macsec_dev_uninit(struct net_device *dev)
3468 struct macsec_dev *macsec = macsec_priv(dev);
3470 gro_cells_destroy(&macsec->gro_cells);
3471 free_percpu(dev->tstats);
3474 static netdev_features_t macsec_fix_features(struct net_device *dev,
3475 netdev_features_t features)
3477 struct macsec_dev *macsec = macsec_priv(dev);
3478 struct net_device *real_dev = macsec->real_dev;
3480 if (macsec_is_offloaded(macsec))
3481 return REAL_DEV_FEATURES(real_dev);
3483 features &= (real_dev->features & SW_MACSEC_FEATURES) |
3484 NETIF_F_GSO_SOFTWARE | NETIF_F_SOFT_FEATURES;
3485 features |= NETIF_F_LLTX;
3490 static int macsec_dev_open(struct net_device *dev)
3492 struct macsec_dev *macsec = macsec_priv(dev);
3493 struct net_device *real_dev = macsec->real_dev;
3496 err = dev_uc_add(real_dev, dev->dev_addr);
3500 if (dev->flags & IFF_ALLMULTI) {
3501 err = dev_set_allmulti(real_dev, 1);
3506 if (dev->flags & IFF_PROMISC) {
3507 err = dev_set_promiscuity(real_dev, 1);
3509 goto clear_allmulti;
3512 /* If h/w offloading is available, propagate to the device */
3513 if (macsec_is_offloaded(macsec)) {
3514 const struct macsec_ops *ops;
3515 struct macsec_context ctx;
3517 ops = macsec_get_ops(netdev_priv(dev), &ctx);
3520 goto clear_allmulti;
3523 ctx.secy = &macsec->secy;
3524 err = macsec_offload(ops->mdo_dev_open, &ctx);
3526 goto clear_allmulti;
3529 if (netif_carrier_ok(real_dev))
3530 netif_carrier_on(dev);
3534 if (dev->flags & IFF_ALLMULTI)
3535 dev_set_allmulti(real_dev, -1);
3537 dev_uc_del(real_dev, dev->dev_addr);
3538 netif_carrier_off(dev);
3542 static int macsec_dev_stop(struct net_device *dev)
3544 struct macsec_dev *macsec = macsec_priv(dev);
3545 struct net_device *real_dev = macsec->real_dev;
3547 netif_carrier_off(dev);
3549 /* If h/w offloading is available, propagate to the device */
3550 if (macsec_is_offloaded(macsec)) {
3551 const struct macsec_ops *ops;
3552 struct macsec_context ctx;
3554 ops = macsec_get_ops(macsec, &ctx);
3556 ctx.secy = &macsec->secy;
3557 macsec_offload(ops->mdo_dev_stop, &ctx);
3561 dev_mc_unsync(real_dev, dev);
3562 dev_uc_unsync(real_dev, dev);
3564 if (dev->flags & IFF_ALLMULTI)
3565 dev_set_allmulti(real_dev, -1);
3567 if (dev->flags & IFF_PROMISC)
3568 dev_set_promiscuity(real_dev, -1);
3570 dev_uc_del(real_dev, dev->dev_addr);
3575 static void macsec_dev_change_rx_flags(struct net_device *dev, int change)
3577 struct net_device *real_dev = macsec_priv(dev)->real_dev;
3579 if (!(dev->flags & IFF_UP))
3582 if (change & IFF_ALLMULTI)
3583 dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1);
3585 if (change & IFF_PROMISC)
3586 dev_set_promiscuity(real_dev,
3587 dev->flags & IFF_PROMISC ? 1 : -1);
3590 static void macsec_dev_set_rx_mode(struct net_device *dev)
3592 struct net_device *real_dev = macsec_priv(dev)->real_dev;
3594 dev_mc_sync(real_dev, dev);
3595 dev_uc_sync(real_dev, dev);
3598 static int macsec_set_mac_address(struct net_device *dev, void *p)
3600 struct macsec_dev *macsec = macsec_priv(dev);
3601 struct net_device *real_dev = macsec->real_dev;
3602 struct sockaddr *addr = p;
3605 if (!is_valid_ether_addr(addr->sa_data))
3606 return -EADDRNOTAVAIL;
3608 if (!(dev->flags & IFF_UP))
3611 err = dev_uc_add(real_dev, addr->sa_data);
3615 dev_uc_del(real_dev, dev->dev_addr);
3618 ether_addr_copy(dev->dev_addr, addr->sa_data);
3619 macsec->secy.sci = dev_to_sci(dev, MACSEC_PORT_ES);
3621 /* If h/w offloading is available, propagate to the device */
3622 if (macsec_is_offloaded(macsec)) {
3623 const struct macsec_ops *ops;
3624 struct macsec_context ctx;
3626 ops = macsec_get_ops(macsec, &ctx);
3628 ctx.secy = &macsec->secy;
3629 macsec_offload(ops->mdo_upd_secy, &ctx);
3636 static int macsec_change_mtu(struct net_device *dev, int new_mtu)
3638 struct macsec_dev *macsec = macsec_priv(dev);
3639 unsigned int extra = macsec->secy.icv_len + macsec_extra_len(true);
3641 if (macsec->real_dev->mtu - extra < new_mtu)
3649 static void macsec_get_stats64(struct net_device *dev,
3650 struct rtnl_link_stats64 *s)
3655 dev_fetch_sw_netstats(s, dev->tstats);
3657 s->rx_dropped = dev->stats.rx_dropped;
3658 s->tx_dropped = dev->stats.tx_dropped;
3661 static int macsec_get_iflink(const struct net_device *dev)
3663 return macsec_priv(dev)->real_dev->ifindex;
3666 static const struct net_device_ops macsec_netdev_ops = {
3667 .ndo_init = macsec_dev_init,
3668 .ndo_uninit = macsec_dev_uninit,
3669 .ndo_open = macsec_dev_open,
3670 .ndo_stop = macsec_dev_stop,
3671 .ndo_fix_features = macsec_fix_features,
3672 .ndo_change_mtu = macsec_change_mtu,
3673 .ndo_set_rx_mode = macsec_dev_set_rx_mode,
3674 .ndo_change_rx_flags = macsec_dev_change_rx_flags,
3675 .ndo_set_mac_address = macsec_set_mac_address,
3676 .ndo_start_xmit = macsec_start_xmit,
3677 .ndo_get_stats64 = macsec_get_stats64,
3678 .ndo_get_iflink = macsec_get_iflink,
3681 static const struct device_type macsec_type = {
3685 static const struct nla_policy macsec_rtnl_policy[IFLA_MACSEC_MAX + 1] = {
3686 [IFLA_MACSEC_SCI] = { .type = NLA_U64 },
3687 [IFLA_MACSEC_PORT] = { .type = NLA_U16 },
3688 [IFLA_MACSEC_ICV_LEN] = { .type = NLA_U8 },
3689 [IFLA_MACSEC_CIPHER_SUITE] = { .type = NLA_U64 },
3690 [IFLA_MACSEC_WINDOW] = { .type = NLA_U32 },
3691 [IFLA_MACSEC_ENCODING_SA] = { .type = NLA_U8 },
3692 [IFLA_MACSEC_ENCRYPT] = { .type = NLA_U8 },
3693 [IFLA_MACSEC_PROTECT] = { .type = NLA_U8 },
3694 [IFLA_MACSEC_INC_SCI] = { .type = NLA_U8 },
3695 [IFLA_MACSEC_ES] = { .type = NLA_U8 },
3696 [IFLA_MACSEC_SCB] = { .type = NLA_U8 },
3697 [IFLA_MACSEC_REPLAY_PROTECT] = { .type = NLA_U8 },
3698 [IFLA_MACSEC_VALIDATION] = { .type = NLA_U8 },
3701 static void macsec_free_netdev(struct net_device *dev)
3703 struct macsec_dev *macsec = macsec_priv(dev);
3705 free_percpu(macsec->stats);
3706 free_percpu(macsec->secy.tx_sc.stats);
3710 static void macsec_setup(struct net_device *dev)
3714 dev->max_mtu = ETH_MAX_MTU;
3715 dev->priv_flags |= IFF_NO_QUEUE;
3716 dev->netdev_ops = &macsec_netdev_ops;
3717 dev->needs_free_netdev = true;
3718 dev->priv_destructor = macsec_free_netdev;
3719 SET_NETDEV_DEVTYPE(dev, &macsec_type);
3721 eth_zero_addr(dev->broadcast);
3724 static int macsec_changelink_common(struct net_device *dev,
3725 struct nlattr *data[])
3727 struct macsec_secy *secy;
3728 struct macsec_tx_sc *tx_sc;
3730 secy = &macsec_priv(dev)->secy;
3731 tx_sc = &secy->tx_sc;
3733 if (data[IFLA_MACSEC_ENCODING_SA]) {
3734 struct macsec_tx_sa *tx_sa;
3736 tx_sc->encoding_sa = nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]);
3737 tx_sa = rtnl_dereference(tx_sc->sa[tx_sc->encoding_sa]);
3739 secy->operational = tx_sa && tx_sa->active;
3742 if (data[IFLA_MACSEC_ENCRYPT])
3743 tx_sc->encrypt = !!nla_get_u8(data[IFLA_MACSEC_ENCRYPT]);
3745 if (data[IFLA_MACSEC_PROTECT])
3746 secy->protect_frames = !!nla_get_u8(data[IFLA_MACSEC_PROTECT]);
3748 if (data[IFLA_MACSEC_INC_SCI])
3749 tx_sc->send_sci = !!nla_get_u8(data[IFLA_MACSEC_INC_SCI]);
3751 if (data[IFLA_MACSEC_ES])
3752 tx_sc->end_station = !!nla_get_u8(data[IFLA_MACSEC_ES]);
3754 if (data[IFLA_MACSEC_SCB])
3755 tx_sc->scb = !!nla_get_u8(data[IFLA_MACSEC_SCB]);
3757 if (data[IFLA_MACSEC_REPLAY_PROTECT])
3758 secy->replay_protect = !!nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT]);
3760 if (data[IFLA_MACSEC_VALIDATION])
3761 secy->validate_frames = nla_get_u8(data[IFLA_MACSEC_VALIDATION]);
3763 if (data[IFLA_MACSEC_CIPHER_SUITE]) {
3764 switch (nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE])) {
3765 case MACSEC_CIPHER_ID_GCM_AES_128:
3766 case MACSEC_DEFAULT_CIPHER_ID:
3767 secy->key_len = MACSEC_GCM_AES_128_SAK_LEN;
3770 case MACSEC_CIPHER_ID_GCM_AES_256:
3771 secy->key_len = MACSEC_GCM_AES_256_SAK_LEN;
3774 case MACSEC_CIPHER_ID_GCM_AES_XPN_128:
3775 secy->key_len = MACSEC_GCM_AES_128_SAK_LEN;
3778 case MACSEC_CIPHER_ID_GCM_AES_XPN_256:
3779 secy->key_len = MACSEC_GCM_AES_256_SAK_LEN;
3787 if (data[IFLA_MACSEC_WINDOW]) {
3788 secy->replay_window = nla_get_u32(data[IFLA_MACSEC_WINDOW]);
3790 /* IEEE 802.1AEbw-2013 10.7.8 - maximum replay window
3791 * for XPN cipher suites */
3793 secy->replay_window > MACSEC_XPN_MAX_REPLAY_WINDOW)
3800 static int macsec_changelink(struct net_device *dev, struct nlattr *tb[],
3801 struct nlattr *data[],
3802 struct netlink_ext_ack *extack)
3804 struct macsec_dev *macsec = macsec_priv(dev);
3805 struct macsec_tx_sc tx_sc;
3806 struct macsec_secy secy;
3812 if (data[IFLA_MACSEC_CIPHER_SUITE] ||
3813 data[IFLA_MACSEC_ICV_LEN] ||
3814 data[IFLA_MACSEC_SCI] ||
3815 data[IFLA_MACSEC_PORT])
3818 /* Keep a copy of unmodified secy and tx_sc, in case the offload
3819 * propagation fails, to revert macsec_changelink_common.
3821 memcpy(&secy, &macsec->secy, sizeof(secy));
3822 memcpy(&tx_sc, &macsec->secy.tx_sc, sizeof(tx_sc));
3824 ret = macsec_changelink_common(dev, data);
3828 /* If h/w offloading is available, propagate to the device */
3829 if (macsec_is_offloaded(macsec)) {
3830 const struct macsec_ops *ops;
3831 struct macsec_context ctx;
3834 ops = macsec_get_ops(netdev_priv(dev), &ctx);
3840 ctx.secy = &macsec->secy;
3841 ret = macsec_offload(ops->mdo_upd_secy, &ctx);
3849 memcpy(&macsec->secy.tx_sc, &tx_sc, sizeof(tx_sc));
3850 memcpy(&macsec->secy, &secy, sizeof(secy));
3855 static void macsec_del_dev(struct macsec_dev *macsec)
3859 while (macsec->secy.rx_sc) {
3860 struct macsec_rx_sc *rx_sc = rtnl_dereference(macsec->secy.rx_sc);
3862 rcu_assign_pointer(macsec->secy.rx_sc, rx_sc->next);
3866 for (i = 0; i < MACSEC_NUM_AN; i++) {
3867 struct macsec_tx_sa *sa = rtnl_dereference(macsec->secy.tx_sc.sa[i]);
3870 RCU_INIT_POINTER(macsec->secy.tx_sc.sa[i], NULL);
3876 static void macsec_common_dellink(struct net_device *dev, struct list_head *head)
3878 struct macsec_dev *macsec = macsec_priv(dev);
3879 struct net_device *real_dev = macsec->real_dev;
3881 /* If h/w offloading is available, propagate to the device */
3882 if (macsec_is_offloaded(macsec)) {
3883 const struct macsec_ops *ops;
3884 struct macsec_context ctx;
3886 ops = macsec_get_ops(netdev_priv(dev), &ctx);
3888 ctx.secy = &macsec->secy;
3889 macsec_offload(ops->mdo_del_secy, &ctx);
3893 unregister_netdevice_queue(dev, head);
3894 list_del_rcu(&macsec->secys);
3895 macsec_del_dev(macsec);
3896 netdev_upper_dev_unlink(real_dev, dev);
3898 macsec_generation++;
3901 static void macsec_dellink(struct net_device *dev, struct list_head *head)
3903 struct macsec_dev *macsec = macsec_priv(dev);
3904 struct net_device *real_dev = macsec->real_dev;
3905 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
3907 macsec_common_dellink(dev, head);
3909 if (list_empty(&rxd->secys)) {
3910 netdev_rx_handler_unregister(real_dev);
3915 static int register_macsec_dev(struct net_device *real_dev,
3916 struct net_device *dev)
3918 struct macsec_dev *macsec = macsec_priv(dev);
3919 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
3924 rxd = kmalloc(sizeof(*rxd), GFP_KERNEL);
3928 INIT_LIST_HEAD(&rxd->secys);
3930 err = netdev_rx_handler_register(real_dev, macsec_handle_frame,
3938 list_add_tail_rcu(&macsec->secys, &rxd->secys);
3942 static bool sci_exists(struct net_device *dev, sci_t sci)
3944 struct macsec_rxh_data *rxd = macsec_data_rtnl(dev);
3945 struct macsec_dev *macsec;
3947 list_for_each_entry(macsec, &rxd->secys, secys) {
3948 if (macsec->secy.sci == sci)
3955 static int macsec_add_dev(struct net_device *dev, sci_t sci, u8 icv_len)
3957 struct macsec_dev *macsec = macsec_priv(dev);
3958 struct macsec_secy *secy = &macsec->secy;
3960 macsec->stats = netdev_alloc_pcpu_stats(struct pcpu_secy_stats);
3964 secy->tx_sc.stats = netdev_alloc_pcpu_stats(struct pcpu_tx_sc_stats);
3965 if (!secy->tx_sc.stats) {
3966 free_percpu(macsec->stats);
3970 if (sci == MACSEC_UNDEF_SCI)
3971 sci = dev_to_sci(dev, MACSEC_PORT_ES);
3974 secy->operational = true;
3975 secy->key_len = DEFAULT_SAK_LEN;
3976 secy->icv_len = icv_len;
3977 secy->validate_frames = MACSEC_VALIDATE_DEFAULT;
3978 secy->protect_frames = true;
3979 secy->replay_protect = false;
3980 secy->xpn = DEFAULT_XPN;
3983 secy->tx_sc.active = true;
3984 secy->tx_sc.encoding_sa = DEFAULT_ENCODING_SA;
3985 secy->tx_sc.encrypt = DEFAULT_ENCRYPT;
3986 secy->tx_sc.send_sci = DEFAULT_SEND_SCI;
3987 secy->tx_sc.end_station = false;
3988 secy->tx_sc.scb = false;
3993 static struct lock_class_key macsec_netdev_addr_lock_key;
3995 static int macsec_newlink(struct net *net, struct net_device *dev,
3996 struct nlattr *tb[], struct nlattr *data[],
3997 struct netlink_ext_ack *extack)
3999 struct macsec_dev *macsec = macsec_priv(dev);
4000 rx_handler_func_t *rx_handler;
4001 u8 icv_len = DEFAULT_ICV_LEN;
4002 struct net_device *real_dev;
4008 real_dev = __dev_get_by_index(net, nla_get_u32(tb[IFLA_LINK]));
4011 if (real_dev->type != ARPHRD_ETHER)
4014 dev->priv_flags |= IFF_MACSEC;
4016 macsec->real_dev = real_dev;
4018 if (data && data[IFLA_MACSEC_OFFLOAD])
4019 macsec->offload = nla_get_offload(data[IFLA_MACSEC_OFFLOAD]);
4021 /* MACsec offloading is off by default */
4022 macsec->offload = MACSEC_OFFLOAD_OFF;
4024 /* Check if the offloading mode is supported by the underlying layers */
4025 if (macsec->offload != MACSEC_OFFLOAD_OFF &&
4026 !macsec_check_offload(macsec->offload, macsec))
4029 /* send_sci must be set to true when transmit sci explicitly is set */
4030 if ((data && data[IFLA_MACSEC_SCI]) &&
4031 (data && data[IFLA_MACSEC_INC_SCI])) {
4032 u8 send_sci = !!nla_get_u8(data[IFLA_MACSEC_INC_SCI]);
4038 if (data && data[IFLA_MACSEC_ICV_LEN])
4039 icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]);
4040 mtu = real_dev->mtu - icv_len - macsec_extra_len(true);
4046 rx_handler = rtnl_dereference(real_dev->rx_handler);
4047 if (rx_handler && rx_handler != macsec_handle_frame)
4050 err = register_netdevice(dev);
4054 netdev_lockdep_set_classes(dev);
4055 lockdep_set_class(&dev->addr_list_lock,
4056 &macsec_netdev_addr_lock_key);
4058 err = netdev_upper_dev_link(real_dev, dev, extack);
4062 /* need to be already registered so that ->init has run and
4063 * the MAC addr is set
4065 if (data && data[IFLA_MACSEC_SCI])
4066 sci = nla_get_sci(data[IFLA_MACSEC_SCI]);
4067 else if (data && data[IFLA_MACSEC_PORT])
4068 sci = dev_to_sci(dev, nla_get_be16(data[IFLA_MACSEC_PORT]));
4070 sci = dev_to_sci(dev, MACSEC_PORT_ES);
4072 if (rx_handler && sci_exists(real_dev, sci)) {
4077 err = macsec_add_dev(dev, sci, icv_len);
4082 err = macsec_changelink_common(dev, data);
4087 /* If h/w offloading is available, propagate to the device */
4088 if (macsec_is_offloaded(macsec)) {
4089 const struct macsec_ops *ops;
4090 struct macsec_context ctx;
4092 ops = macsec_get_ops(macsec, &ctx);
4094 ctx.secy = &macsec->secy;
4095 err = macsec_offload(ops->mdo_add_secy, &ctx);
4101 err = register_macsec_dev(real_dev, dev);
4105 netif_stacked_transfer_operstate(real_dev, dev);
4106 linkwatch_fire_event(dev);
4108 macsec_generation++;
4113 macsec_del_dev(macsec);
4115 netdev_upper_dev_unlink(real_dev, dev);
4117 unregister_netdevice(dev);
4121 static int macsec_validate_attr(struct nlattr *tb[], struct nlattr *data[],
4122 struct netlink_ext_ack *extack)
4124 u64 csid = MACSEC_DEFAULT_CIPHER_ID;
4125 u8 icv_len = DEFAULT_ICV_LEN;
4132 if (data[IFLA_MACSEC_CIPHER_SUITE])
4133 csid = nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE]);
4135 if (data[IFLA_MACSEC_ICV_LEN]) {
4136 icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]);
4137 if (icv_len != DEFAULT_ICV_LEN) {
4138 char dummy_key[DEFAULT_SAK_LEN] = { 0 };
4139 struct crypto_aead *dummy_tfm;
4141 dummy_tfm = macsec_alloc_tfm(dummy_key,
4144 if (IS_ERR(dummy_tfm))
4145 return PTR_ERR(dummy_tfm);
4146 crypto_free_aead(dummy_tfm);
4151 case MACSEC_CIPHER_ID_GCM_AES_128:
4152 case MACSEC_CIPHER_ID_GCM_AES_256:
4153 case MACSEC_CIPHER_ID_GCM_AES_XPN_128:
4154 case MACSEC_CIPHER_ID_GCM_AES_XPN_256:
4155 case MACSEC_DEFAULT_CIPHER_ID:
4156 if (icv_len < MACSEC_MIN_ICV_LEN ||
4157 icv_len > MACSEC_STD_ICV_LEN)
4164 if (data[IFLA_MACSEC_ENCODING_SA]) {
4165 if (nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]) >= MACSEC_NUM_AN)
4169 for (flag = IFLA_MACSEC_ENCODING_SA + 1;
4170 flag < IFLA_MACSEC_VALIDATION;
4173 if (nla_get_u8(data[flag]) > 1)
4178 es = data[IFLA_MACSEC_ES] ? nla_get_u8(data[IFLA_MACSEC_ES]) : false;
4179 sci = data[IFLA_MACSEC_INC_SCI] ? nla_get_u8(data[IFLA_MACSEC_INC_SCI]) : false;
4180 scb = data[IFLA_MACSEC_SCB] ? nla_get_u8(data[IFLA_MACSEC_SCB]) : false;
4182 if ((sci && (scb || es)) || (scb && es))
4185 if (data[IFLA_MACSEC_VALIDATION] &&
4186 nla_get_u8(data[IFLA_MACSEC_VALIDATION]) > MACSEC_VALIDATE_MAX)
4189 if ((data[IFLA_MACSEC_REPLAY_PROTECT] &&
4190 nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT])) &&
4191 !data[IFLA_MACSEC_WINDOW])
4197 static struct net *macsec_get_link_net(const struct net_device *dev)
4199 return dev_net(macsec_priv(dev)->real_dev);
4202 static size_t macsec_get_size(const struct net_device *dev)
4204 return nla_total_size_64bit(8) + /* IFLA_MACSEC_SCI */
4205 nla_total_size(1) + /* IFLA_MACSEC_ICV_LEN */
4206 nla_total_size_64bit(8) + /* IFLA_MACSEC_CIPHER_SUITE */
4207 nla_total_size(4) + /* IFLA_MACSEC_WINDOW */
4208 nla_total_size(1) + /* IFLA_MACSEC_ENCODING_SA */
4209 nla_total_size(1) + /* IFLA_MACSEC_ENCRYPT */
4210 nla_total_size(1) + /* IFLA_MACSEC_PROTECT */
4211 nla_total_size(1) + /* IFLA_MACSEC_INC_SCI */
4212 nla_total_size(1) + /* IFLA_MACSEC_ES */
4213 nla_total_size(1) + /* IFLA_MACSEC_SCB */
4214 nla_total_size(1) + /* IFLA_MACSEC_REPLAY_PROTECT */
4215 nla_total_size(1) + /* IFLA_MACSEC_VALIDATION */
4219 static int macsec_fill_info(struct sk_buff *skb,
4220 const struct net_device *dev)
4222 struct macsec_secy *secy = &macsec_priv(dev)->secy;
4223 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
4226 switch (secy->key_len) {
4227 case MACSEC_GCM_AES_128_SAK_LEN:
4228 csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_128 : MACSEC_DEFAULT_CIPHER_ID;
4230 case MACSEC_GCM_AES_256_SAK_LEN:
4231 csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_256 : MACSEC_CIPHER_ID_GCM_AES_256;
4234 goto nla_put_failure;
4237 if (nla_put_sci(skb, IFLA_MACSEC_SCI, secy->sci,
4239 nla_put_u8(skb, IFLA_MACSEC_ICV_LEN, secy->icv_len) ||
4240 nla_put_u64_64bit(skb, IFLA_MACSEC_CIPHER_SUITE,
4241 csid, IFLA_MACSEC_PAD) ||
4242 nla_put_u8(skb, IFLA_MACSEC_ENCODING_SA, tx_sc->encoding_sa) ||
4243 nla_put_u8(skb, IFLA_MACSEC_ENCRYPT, tx_sc->encrypt) ||
4244 nla_put_u8(skb, IFLA_MACSEC_PROTECT, secy->protect_frames) ||
4245 nla_put_u8(skb, IFLA_MACSEC_INC_SCI, tx_sc->send_sci) ||
4246 nla_put_u8(skb, IFLA_MACSEC_ES, tx_sc->end_station) ||
4247 nla_put_u8(skb, IFLA_MACSEC_SCB, tx_sc->scb) ||
4248 nla_put_u8(skb, IFLA_MACSEC_REPLAY_PROTECT, secy->replay_protect) ||
4249 nla_put_u8(skb, IFLA_MACSEC_VALIDATION, secy->validate_frames) ||
4251 goto nla_put_failure;
4253 if (secy->replay_protect) {
4254 if (nla_put_u32(skb, IFLA_MACSEC_WINDOW, secy->replay_window))
4255 goto nla_put_failure;
4264 static struct rtnl_link_ops macsec_link_ops __read_mostly = {
4266 .priv_size = sizeof(struct macsec_dev),
4267 .maxtype = IFLA_MACSEC_MAX,
4268 .policy = macsec_rtnl_policy,
4269 .setup = macsec_setup,
4270 .validate = macsec_validate_attr,
4271 .newlink = macsec_newlink,
4272 .changelink = macsec_changelink,
4273 .dellink = macsec_dellink,
4274 .get_size = macsec_get_size,
4275 .fill_info = macsec_fill_info,
4276 .get_link_net = macsec_get_link_net,
4279 static bool is_macsec_master(struct net_device *dev)
4281 return rcu_access_pointer(dev->rx_handler) == macsec_handle_frame;
4284 static int macsec_notify(struct notifier_block *this, unsigned long event,
4287 struct net_device *real_dev = netdev_notifier_info_to_dev(ptr);
4290 if (!is_macsec_master(real_dev))
4296 case NETDEV_CHANGE: {
4297 struct macsec_dev *m, *n;
4298 struct macsec_rxh_data *rxd;
4300 rxd = macsec_data_rtnl(real_dev);
4301 list_for_each_entry_safe(m, n, &rxd->secys, secys) {
4302 struct net_device *dev = m->secy.netdev;
4304 netif_stacked_transfer_operstate(real_dev, dev);
4308 case NETDEV_UNREGISTER: {
4309 struct macsec_dev *m, *n;
4310 struct macsec_rxh_data *rxd;
4312 rxd = macsec_data_rtnl(real_dev);
4313 list_for_each_entry_safe(m, n, &rxd->secys, secys) {
4314 macsec_common_dellink(m->secy.netdev, &head);
4317 netdev_rx_handler_unregister(real_dev);
4320 unregister_netdevice_many(&head);
4323 case NETDEV_CHANGEMTU: {
4324 struct macsec_dev *m;
4325 struct macsec_rxh_data *rxd;
4327 rxd = macsec_data_rtnl(real_dev);
4328 list_for_each_entry(m, &rxd->secys, secys) {
4329 struct net_device *dev = m->secy.netdev;
4330 unsigned int mtu = real_dev->mtu - (m->secy.icv_len +
4331 macsec_extra_len(true));
4334 dev_set_mtu(dev, mtu);
4342 static struct notifier_block macsec_notifier = {
4343 .notifier_call = macsec_notify,
4346 static int __init macsec_init(void)
4350 pr_info("MACsec IEEE 802.1AE\n");
4351 err = register_netdevice_notifier(&macsec_notifier);
4355 err = rtnl_link_register(&macsec_link_ops);
4359 err = genl_register_family(&macsec_fam);
4366 rtnl_link_unregister(&macsec_link_ops);
4368 unregister_netdevice_notifier(&macsec_notifier);
4372 static void __exit macsec_exit(void)
4374 genl_unregister_family(&macsec_fam);
4375 rtnl_link_unregister(&macsec_link_ops);
4376 unregister_netdevice_notifier(&macsec_notifier);
4380 module_init(macsec_init);
4381 module_exit(macsec_exit);
4383 MODULE_ALIAS_RTNL_LINK("macsec");
4384 MODULE_ALIAS_GENL_FAMILY("macsec");
4386 MODULE_DESCRIPTION("MACsec IEEE 802.1AE");
4387 MODULE_LICENSE("GPL v2");