1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * drivers/net/macsec.c - MACsec device
8 #include <linux/types.h>
9 #include <linux/skbuff.h>
10 #include <linux/socket.h>
11 #include <linux/module.h>
12 #include <crypto/aead.h>
13 #include <linux/etherdevice.h>
14 #include <linux/netdevice.h>
15 #include <linux/rtnetlink.h>
16 #include <linux/refcount.h>
17 #include <net/genetlink.h>
19 #include <net/gro_cells.h>
20 #include <net/macsec.h>
21 #include <net/dst_metadata.h>
22 #include <linux/phy.h>
23 #include <linux/byteorder/generic.h>
24 #include <linux/if_arp.h>
26 #include <uapi/linux/if_macsec.h>
28 /* SecTAG length = macsec_eth_header without the optional SCI */
29 #define MACSEC_TAG_LEN 6
31 struct macsec_eth_header {
35 #if defined(__LITTLE_ENDIAN_BITFIELD)
38 #elif defined(__BIG_ENDIAN_BITFIELD)
42 #error "Please fix <asm/byteorder.h>"
45 u8 secure_channel_id[8]; /* optional */
48 /* minimum secure data length deemed "not short", see IEEE 802.1AE-2006 9.7 */
49 #define MIN_NON_SHORT_LEN 48
51 #define GCM_AES_IV_LEN 12
53 #define for_each_rxsc(secy, sc) \
54 for (sc = rcu_dereference_bh(secy->rx_sc); \
56 sc = rcu_dereference_bh(sc->next))
57 #define for_each_rxsc_rtnl(secy, sc) \
58 for (sc = rtnl_dereference(secy->rx_sc); \
60 sc = rtnl_dereference(sc->next))
62 #define pn_same_half(pn1, pn2) (!(((pn1) >> 31) ^ ((pn2) >> 31)))
66 u8 short_secure_channel_id[4];
74 u8 secure_channel_id[8];
80 #define MACSEC_VALIDATE_DEFAULT MACSEC_VALIDATE_STRICT
82 struct pcpu_secy_stats {
83 struct macsec_dev_stats stats;
84 struct u64_stats_sync syncp;
88 * struct macsec_dev - private data
90 * @real_dev: pointer to underlying netdevice
91 * @dev_tracker: refcount tracker for @real_dev reference
92 * @stats: MACsec device stats
93 * @secys: linked list of SecY's on the underlying device
94 * @gro_cells: pointer to the Generic Receive Offload cell
95 * @offload: status of offloading on the MACsec device
98 struct macsec_secy secy;
99 struct net_device *real_dev;
100 netdevice_tracker dev_tracker;
101 struct pcpu_secy_stats __percpu *stats;
102 struct list_head secys;
103 struct gro_cells gro_cells;
104 enum macsec_offload offload;
108 * struct macsec_rxh_data - rx_handler private argument
109 * @secys: linked list of SecY's on this underlying device
111 struct macsec_rxh_data {
112 struct list_head secys;
115 static struct macsec_dev *macsec_priv(const struct net_device *dev)
117 return (struct macsec_dev *)netdev_priv(dev);
120 static struct macsec_rxh_data *macsec_data_rcu(const struct net_device *dev)
122 return rcu_dereference_bh(dev->rx_handler_data);
125 static struct macsec_rxh_data *macsec_data_rtnl(const struct net_device *dev)
127 return rtnl_dereference(dev->rx_handler_data);
131 struct aead_request *req;
133 struct macsec_tx_sa *tx_sa;
134 struct macsec_rx_sa *rx_sa;
141 static struct macsec_rx_sa *macsec_rxsa_get(struct macsec_rx_sa __rcu *ptr)
143 struct macsec_rx_sa *sa = rcu_dereference_bh(ptr);
145 if (!sa || !sa->active)
148 if (!refcount_inc_not_zero(&sa->refcnt))
154 static struct macsec_rx_sa *macsec_active_rxsa_get(struct macsec_rx_sc *rx_sc)
156 struct macsec_rx_sa *sa = NULL;
159 for (an = 0; an < MACSEC_NUM_AN; an++) {
160 sa = macsec_rxsa_get(rx_sc->sa[an]);
167 static void free_rx_sc_rcu(struct rcu_head *head)
169 struct macsec_rx_sc *rx_sc = container_of(head, struct macsec_rx_sc, rcu_head);
171 free_percpu(rx_sc->stats);
175 static struct macsec_rx_sc *macsec_rxsc_get(struct macsec_rx_sc *sc)
177 return refcount_inc_not_zero(&sc->refcnt) ? sc : NULL;
180 static void macsec_rxsc_put(struct macsec_rx_sc *sc)
182 if (refcount_dec_and_test(&sc->refcnt))
183 call_rcu(&sc->rcu_head, free_rx_sc_rcu);
186 static void free_rxsa(struct rcu_head *head)
188 struct macsec_rx_sa *sa = container_of(head, struct macsec_rx_sa, rcu);
190 crypto_free_aead(sa->key.tfm);
191 free_percpu(sa->stats);
195 static void macsec_rxsa_put(struct macsec_rx_sa *sa)
197 if (refcount_dec_and_test(&sa->refcnt))
198 call_rcu(&sa->rcu, free_rxsa);
201 static struct macsec_tx_sa *macsec_txsa_get(struct macsec_tx_sa __rcu *ptr)
203 struct macsec_tx_sa *sa = rcu_dereference_bh(ptr);
205 if (!sa || !sa->active)
208 if (!refcount_inc_not_zero(&sa->refcnt))
214 static void free_txsa(struct rcu_head *head)
216 struct macsec_tx_sa *sa = container_of(head, struct macsec_tx_sa, rcu);
218 crypto_free_aead(sa->key.tfm);
219 free_percpu(sa->stats);
223 static void macsec_txsa_put(struct macsec_tx_sa *sa)
225 if (refcount_dec_and_test(&sa->refcnt))
226 call_rcu(&sa->rcu, free_txsa);
229 static struct macsec_cb *macsec_skb_cb(struct sk_buff *skb)
231 BUILD_BUG_ON(sizeof(struct macsec_cb) > sizeof(skb->cb));
232 return (struct macsec_cb *)skb->cb;
235 #define MACSEC_PORT_SCB (0x0000)
236 #define MACSEC_UNDEF_SCI ((__force sci_t)0xffffffffffffffffULL)
237 #define MACSEC_UNDEF_SSCI ((__force ssci_t)0xffffffff)
239 #define MACSEC_GCM_AES_128_SAK_LEN 16
240 #define MACSEC_GCM_AES_256_SAK_LEN 32
242 #define DEFAULT_SAK_LEN MACSEC_GCM_AES_128_SAK_LEN
243 #define DEFAULT_XPN false
244 #define DEFAULT_SEND_SCI true
245 #define DEFAULT_ENCRYPT false
246 #define DEFAULT_ENCODING_SA 0
247 #define MACSEC_XPN_MAX_REPLAY_WINDOW (((1 << 30) - 1))
249 static sci_t make_sci(const u8 *addr, __be16 port)
253 memcpy(&sci, addr, ETH_ALEN);
254 memcpy(((char *)&sci) + ETH_ALEN, &port, sizeof(port));
259 static sci_t macsec_frame_sci(struct macsec_eth_header *hdr, bool sci_present)
264 memcpy(&sci, hdr->secure_channel_id,
265 sizeof(hdr->secure_channel_id));
267 sci = make_sci(hdr->eth.h_source, MACSEC_PORT_ES);
272 static unsigned int macsec_sectag_len(bool sci_present)
274 return MACSEC_TAG_LEN + (sci_present ? MACSEC_SCI_LEN : 0);
277 static unsigned int macsec_hdr_len(bool sci_present)
279 return macsec_sectag_len(sci_present) + ETH_HLEN;
282 static unsigned int macsec_extra_len(bool sci_present)
284 return macsec_sectag_len(sci_present) + sizeof(__be16);
287 /* Fill SecTAG according to IEEE 802.1AE-2006 10.5.3 */
288 static void macsec_fill_sectag(struct macsec_eth_header *h,
289 const struct macsec_secy *secy, u32 pn,
292 const struct macsec_tx_sc *tx_sc = &secy->tx_sc;
294 memset(&h->tci_an, 0, macsec_sectag_len(sci_present));
295 h->eth.h_proto = htons(ETH_P_MACSEC);
298 h->tci_an |= MACSEC_TCI_SC;
299 memcpy(&h->secure_channel_id, &secy->sci,
300 sizeof(h->secure_channel_id));
302 if (tx_sc->end_station)
303 h->tci_an |= MACSEC_TCI_ES;
305 h->tci_an |= MACSEC_TCI_SCB;
308 h->packet_number = htonl(pn);
310 /* with GCM, C/E clear for !encrypt, both set for encrypt */
312 h->tci_an |= MACSEC_TCI_CONFID;
313 else if (secy->icv_len != MACSEC_DEFAULT_ICV_LEN)
314 h->tci_an |= MACSEC_TCI_C;
316 h->tci_an |= tx_sc->encoding_sa;
319 static void macsec_set_shortlen(struct macsec_eth_header *h, size_t data_len)
321 if (data_len < MIN_NON_SHORT_LEN)
322 h->short_length = data_len;
325 /* Checks if a MACsec interface is being offloaded to an hardware engine */
326 static bool macsec_is_offloaded(struct macsec_dev *macsec)
328 if (macsec->offload == MACSEC_OFFLOAD_MAC ||
329 macsec->offload == MACSEC_OFFLOAD_PHY)
335 /* Checks if underlying layers implement MACsec offloading functions. */
336 static bool macsec_check_offload(enum macsec_offload offload,
337 struct macsec_dev *macsec)
339 if (!macsec || !macsec->real_dev)
342 if (offload == MACSEC_OFFLOAD_PHY)
343 return macsec->real_dev->phydev &&
344 macsec->real_dev->phydev->macsec_ops;
345 else if (offload == MACSEC_OFFLOAD_MAC)
346 return macsec->real_dev->features & NETIF_F_HW_MACSEC &&
347 macsec->real_dev->macsec_ops;
352 static const struct macsec_ops *__macsec_get_ops(enum macsec_offload offload,
353 struct macsec_dev *macsec,
354 struct macsec_context *ctx)
357 memset(ctx, 0, sizeof(*ctx));
358 ctx->offload = offload;
360 if (offload == MACSEC_OFFLOAD_PHY)
361 ctx->phydev = macsec->real_dev->phydev;
362 else if (offload == MACSEC_OFFLOAD_MAC)
363 ctx->netdev = macsec->real_dev;
366 if (offload == MACSEC_OFFLOAD_PHY)
367 return macsec->real_dev->phydev->macsec_ops;
369 return macsec->real_dev->macsec_ops;
372 /* Returns a pointer to the MACsec ops struct if any and updates the MACsec
373 * context device reference if provided.
375 static const struct macsec_ops *macsec_get_ops(struct macsec_dev *macsec,
376 struct macsec_context *ctx)
378 if (!macsec_check_offload(macsec->offload, macsec))
381 return __macsec_get_ops(macsec->offload, macsec, ctx);
384 /* validate MACsec packet according to IEEE 802.1AE-2018 9.12 */
385 static bool macsec_validate_skb(struct sk_buff *skb, u16 icv_len, bool xpn)
387 struct macsec_eth_header *h = (struct macsec_eth_header *)skb->data;
388 int len = skb->len - 2 * ETH_ALEN;
389 int extra_len = macsec_extra_len(!!(h->tci_an & MACSEC_TCI_SC)) + icv_len;
391 /* a) It comprises at least 17 octets */
395 /* b) MACsec EtherType: already checked */
397 /* c) V bit is clear */
398 if (h->tci_an & MACSEC_TCI_VERSION)
401 /* d) ES or SCB => !SC */
402 if ((h->tci_an & MACSEC_TCI_ES || h->tci_an & MACSEC_TCI_SCB) &&
403 (h->tci_an & MACSEC_TCI_SC))
406 /* e) Bits 7 and 8 of octet 4 of the SecTAG are clear */
410 /* rx.pn != 0 if not XPN (figure 10-5 with 802.11AEbw-2013 amendment) */
411 if (!h->packet_number && !xpn)
414 /* length check, f) g) h) i) */
416 return len == extra_len + h->short_length;
417 return len >= extra_len + MIN_NON_SHORT_LEN;
420 #define MACSEC_NEEDED_HEADROOM (macsec_extra_len(true))
421 #define MACSEC_NEEDED_TAILROOM MACSEC_STD_ICV_LEN
423 static void macsec_fill_iv_xpn(unsigned char *iv, ssci_t ssci, u64 pn,
426 struct gcm_iv_xpn *gcm_iv = (struct gcm_iv_xpn *)iv;
428 gcm_iv->ssci = ssci ^ salt.ssci;
429 gcm_iv->pn = cpu_to_be64(pn) ^ salt.pn;
432 static void macsec_fill_iv(unsigned char *iv, sci_t sci, u32 pn)
434 struct gcm_iv *gcm_iv = (struct gcm_iv *)iv;
437 gcm_iv->pn = htonl(pn);
440 static struct macsec_eth_header *macsec_ethhdr(struct sk_buff *skb)
442 return (struct macsec_eth_header *)skb_mac_header(skb);
445 static void __macsec_pn_wrapped(struct macsec_secy *secy,
446 struct macsec_tx_sa *tx_sa)
448 pr_debug("PN wrapped, transitioning to !oper\n");
449 tx_sa->active = false;
450 if (secy->protect_frames)
451 secy->operational = false;
454 void macsec_pn_wrapped(struct macsec_secy *secy, struct macsec_tx_sa *tx_sa)
456 spin_lock_bh(&tx_sa->lock);
457 __macsec_pn_wrapped(secy, tx_sa);
458 spin_unlock_bh(&tx_sa->lock);
460 EXPORT_SYMBOL_GPL(macsec_pn_wrapped);
462 static pn_t tx_sa_update_pn(struct macsec_tx_sa *tx_sa,
463 struct macsec_secy *secy)
467 spin_lock_bh(&tx_sa->lock);
469 pn = tx_sa->next_pn_halves;
473 tx_sa->next_pn_halves.lower++;
475 if (tx_sa->next_pn == 0)
476 __macsec_pn_wrapped(secy, tx_sa);
477 spin_unlock_bh(&tx_sa->lock);
482 static void macsec_encrypt_finish(struct sk_buff *skb, struct net_device *dev)
484 struct macsec_dev *macsec = netdev_priv(dev);
486 skb->dev = macsec->real_dev;
487 skb_reset_mac_header(skb);
488 skb->protocol = eth_hdr(skb)->h_proto;
491 static unsigned int macsec_msdu_len(struct sk_buff *skb)
493 struct macsec_dev *macsec = macsec_priv(skb->dev);
494 struct macsec_secy *secy = &macsec->secy;
495 bool sci_present = macsec_skb_cb(skb)->has_sci;
497 return skb->len - macsec_hdr_len(sci_present) - secy->icv_len;
500 static void macsec_count_tx(struct sk_buff *skb, struct macsec_tx_sc *tx_sc,
501 struct macsec_tx_sa *tx_sa)
503 unsigned int msdu_len = macsec_msdu_len(skb);
504 struct pcpu_tx_sc_stats *txsc_stats = this_cpu_ptr(tx_sc->stats);
506 u64_stats_update_begin(&txsc_stats->syncp);
507 if (tx_sc->encrypt) {
508 txsc_stats->stats.OutOctetsEncrypted += msdu_len;
509 txsc_stats->stats.OutPktsEncrypted++;
510 this_cpu_inc(tx_sa->stats->OutPktsEncrypted);
512 txsc_stats->stats.OutOctetsProtected += msdu_len;
513 txsc_stats->stats.OutPktsProtected++;
514 this_cpu_inc(tx_sa->stats->OutPktsProtected);
516 u64_stats_update_end(&txsc_stats->syncp);
519 static void count_tx(struct net_device *dev, int ret, int len)
521 if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN))
522 dev_sw_netstats_tx_add(dev, 1, len);
525 static void macsec_encrypt_done(void *data, int err)
527 struct sk_buff *skb = data;
528 struct net_device *dev = skb->dev;
529 struct macsec_dev *macsec = macsec_priv(dev);
530 struct macsec_tx_sa *sa = macsec_skb_cb(skb)->tx_sa;
533 aead_request_free(macsec_skb_cb(skb)->req);
536 macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa);
537 /* packet is encrypted/protected so tx_bytes must be calculated */
538 len = macsec_msdu_len(skb) + 2 * ETH_ALEN;
539 macsec_encrypt_finish(skb, dev);
540 ret = dev_queue_xmit(skb);
541 count_tx(dev, ret, len);
542 rcu_read_unlock_bh();
548 static struct aead_request *macsec_alloc_req(struct crypto_aead *tfm,
550 struct scatterlist **sg,
553 size_t size, iv_offset, sg_offset;
554 struct aead_request *req;
557 size = sizeof(struct aead_request) + crypto_aead_reqsize(tfm);
559 size += GCM_AES_IV_LEN;
561 size = ALIGN(size, __alignof__(struct scatterlist));
563 size += sizeof(struct scatterlist) * num_frags;
565 tmp = kmalloc(size, GFP_ATOMIC);
569 *iv = (unsigned char *)(tmp + iv_offset);
570 *sg = (struct scatterlist *)(tmp + sg_offset);
573 aead_request_set_tfm(req, tfm);
578 static struct sk_buff *macsec_encrypt(struct sk_buff *skb,
579 struct net_device *dev)
582 struct scatterlist *sg;
583 struct sk_buff *trailer;
586 struct macsec_eth_header *hh;
587 size_t unprotected_len;
588 struct aead_request *req;
589 struct macsec_secy *secy;
590 struct macsec_tx_sc *tx_sc;
591 struct macsec_tx_sa *tx_sa;
592 struct macsec_dev *macsec = macsec_priv(dev);
596 secy = &macsec->secy;
597 tx_sc = &secy->tx_sc;
599 /* 10.5.1 TX SA assignment */
600 tx_sa = macsec_txsa_get(tx_sc->sa[tx_sc->encoding_sa]);
602 secy->operational = false;
604 return ERR_PTR(-EINVAL);
607 if (unlikely(skb_headroom(skb) < MACSEC_NEEDED_HEADROOM ||
608 skb_tailroom(skb) < MACSEC_NEEDED_TAILROOM)) {
609 struct sk_buff *nskb = skb_copy_expand(skb,
610 MACSEC_NEEDED_HEADROOM,
611 MACSEC_NEEDED_TAILROOM,
617 macsec_txsa_put(tx_sa);
619 return ERR_PTR(-ENOMEM);
622 skb = skb_unshare(skb, GFP_ATOMIC);
624 macsec_txsa_put(tx_sa);
625 return ERR_PTR(-ENOMEM);
629 unprotected_len = skb->len;
631 sci_present = macsec_send_sci(secy);
632 hh = skb_push(skb, macsec_extra_len(sci_present));
633 memmove(hh, eth, 2 * ETH_ALEN);
635 pn = tx_sa_update_pn(tx_sa, secy);
636 if (pn.full64 == 0) {
637 macsec_txsa_put(tx_sa);
639 return ERR_PTR(-ENOLINK);
641 macsec_fill_sectag(hh, secy, pn.lower, sci_present);
642 macsec_set_shortlen(hh, unprotected_len - 2 * ETH_ALEN);
644 skb_put(skb, secy->icv_len);
646 if (skb->len - ETH_HLEN > macsec_priv(dev)->real_dev->mtu) {
647 struct pcpu_secy_stats *secy_stats = this_cpu_ptr(macsec->stats);
649 u64_stats_update_begin(&secy_stats->syncp);
650 secy_stats->stats.OutPktsTooLong++;
651 u64_stats_update_end(&secy_stats->syncp);
653 macsec_txsa_put(tx_sa);
655 return ERR_PTR(-EINVAL);
658 ret = skb_cow_data(skb, 0, &trailer);
659 if (unlikely(ret < 0)) {
660 macsec_txsa_put(tx_sa);
665 req = macsec_alloc_req(tx_sa->key.tfm, &iv, &sg, ret);
667 macsec_txsa_put(tx_sa);
669 return ERR_PTR(-ENOMEM);
673 macsec_fill_iv_xpn(iv, tx_sa->ssci, pn.full64, tx_sa->key.salt);
675 macsec_fill_iv(iv, secy->sci, pn.lower);
677 sg_init_table(sg, ret);
678 ret = skb_to_sgvec(skb, sg, 0, skb->len);
679 if (unlikely(ret < 0)) {
680 aead_request_free(req);
681 macsec_txsa_put(tx_sa);
686 if (tx_sc->encrypt) {
687 int len = skb->len - macsec_hdr_len(sci_present) -
689 aead_request_set_crypt(req, sg, sg, len, iv);
690 aead_request_set_ad(req, macsec_hdr_len(sci_present));
692 aead_request_set_crypt(req, sg, sg, 0, iv);
693 aead_request_set_ad(req, skb->len - secy->icv_len);
696 macsec_skb_cb(skb)->req = req;
697 macsec_skb_cb(skb)->tx_sa = tx_sa;
698 macsec_skb_cb(skb)->has_sci = sci_present;
699 aead_request_set_callback(req, 0, macsec_encrypt_done, skb);
702 ret = crypto_aead_encrypt(req);
703 if (ret == -EINPROGRESS) {
705 } else if (ret != 0) {
708 aead_request_free(req);
709 macsec_txsa_put(tx_sa);
710 return ERR_PTR(-EINVAL);
714 aead_request_free(req);
715 macsec_txsa_put(tx_sa);
720 static bool macsec_post_decrypt(struct sk_buff *skb, struct macsec_secy *secy, u32 pn)
722 struct macsec_rx_sa *rx_sa = macsec_skb_cb(skb)->rx_sa;
723 struct pcpu_rx_sc_stats *rxsc_stats = this_cpu_ptr(rx_sa->sc->stats);
724 struct macsec_eth_header *hdr = macsec_ethhdr(skb);
727 spin_lock(&rx_sa->lock);
728 if (rx_sa->next_pn_halves.lower >= secy->replay_window)
729 lowest_pn = rx_sa->next_pn_halves.lower - secy->replay_window;
731 /* Now perform replay protection check again
732 * (see IEEE 802.1AE-2006 figure 10-5)
734 if (secy->replay_protect && pn < lowest_pn &&
735 (!secy->xpn || pn_same_half(pn, lowest_pn))) {
736 spin_unlock(&rx_sa->lock);
737 u64_stats_update_begin(&rxsc_stats->syncp);
738 rxsc_stats->stats.InPktsLate++;
739 u64_stats_update_end(&rxsc_stats->syncp);
740 DEV_STATS_INC(secy->netdev, rx_dropped);
744 if (secy->validate_frames != MACSEC_VALIDATE_DISABLED) {
745 unsigned int msdu_len = macsec_msdu_len(skb);
746 u64_stats_update_begin(&rxsc_stats->syncp);
747 if (hdr->tci_an & MACSEC_TCI_E)
748 rxsc_stats->stats.InOctetsDecrypted += msdu_len;
750 rxsc_stats->stats.InOctetsValidated += msdu_len;
751 u64_stats_update_end(&rxsc_stats->syncp);
754 if (!macsec_skb_cb(skb)->valid) {
755 spin_unlock(&rx_sa->lock);
758 if (hdr->tci_an & MACSEC_TCI_C ||
759 secy->validate_frames == MACSEC_VALIDATE_STRICT) {
760 u64_stats_update_begin(&rxsc_stats->syncp);
761 rxsc_stats->stats.InPktsNotValid++;
762 u64_stats_update_end(&rxsc_stats->syncp);
763 this_cpu_inc(rx_sa->stats->InPktsNotValid);
764 DEV_STATS_INC(secy->netdev, rx_errors);
768 u64_stats_update_begin(&rxsc_stats->syncp);
769 if (secy->validate_frames == MACSEC_VALIDATE_CHECK) {
770 rxsc_stats->stats.InPktsInvalid++;
771 this_cpu_inc(rx_sa->stats->InPktsInvalid);
772 } else if (pn < lowest_pn) {
773 rxsc_stats->stats.InPktsDelayed++;
775 rxsc_stats->stats.InPktsUnchecked++;
777 u64_stats_update_end(&rxsc_stats->syncp);
779 u64_stats_update_begin(&rxsc_stats->syncp);
780 if (pn < lowest_pn) {
781 rxsc_stats->stats.InPktsDelayed++;
783 rxsc_stats->stats.InPktsOK++;
784 this_cpu_inc(rx_sa->stats->InPktsOK);
786 u64_stats_update_end(&rxsc_stats->syncp);
788 // Instead of "pn >=" - to support pn overflow in xpn
789 if (pn + 1 > rx_sa->next_pn_halves.lower) {
790 rx_sa->next_pn_halves.lower = pn + 1;
791 } else if (secy->xpn &&
792 !pn_same_half(pn, rx_sa->next_pn_halves.lower)) {
793 rx_sa->next_pn_halves.upper++;
794 rx_sa->next_pn_halves.lower = pn + 1;
797 spin_unlock(&rx_sa->lock);
803 static void macsec_reset_skb(struct sk_buff *skb, struct net_device *dev)
805 skb->pkt_type = PACKET_HOST;
806 skb->protocol = eth_type_trans(skb, dev);
808 skb_reset_network_header(skb);
809 if (!skb_transport_header_was_set(skb))
810 skb_reset_transport_header(skb);
811 skb_reset_mac_len(skb);
814 static void macsec_finalize_skb(struct sk_buff *skb, u8 icv_len, u8 hdr_len)
816 skb->ip_summed = CHECKSUM_NONE;
817 memmove(skb->data + hdr_len, skb->data, 2 * ETH_ALEN);
818 skb_pull(skb, hdr_len);
819 pskb_trim_unique(skb, skb->len - icv_len);
822 static void count_rx(struct net_device *dev, int len)
824 dev_sw_netstats_rx_add(dev, len);
827 static void macsec_decrypt_done(void *data, int err)
829 struct sk_buff *skb = data;
830 struct net_device *dev = skb->dev;
831 struct macsec_dev *macsec = macsec_priv(dev);
832 struct macsec_rx_sa *rx_sa = macsec_skb_cb(skb)->rx_sa;
833 struct macsec_rx_sc *rx_sc = rx_sa->sc;
837 aead_request_free(macsec_skb_cb(skb)->req);
840 macsec_skb_cb(skb)->valid = true;
843 pn = ntohl(macsec_ethhdr(skb)->packet_number);
844 if (!macsec_post_decrypt(skb, &macsec->secy, pn)) {
845 rcu_read_unlock_bh();
850 macsec_finalize_skb(skb, macsec->secy.icv_len,
851 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
853 macsec_reset_skb(skb, macsec->secy.netdev);
855 if (gro_cells_receive(&macsec->gro_cells, skb) == NET_RX_SUCCESS)
858 rcu_read_unlock_bh();
861 macsec_rxsa_put(rx_sa);
862 macsec_rxsc_put(rx_sc);
866 static struct sk_buff *macsec_decrypt(struct sk_buff *skb,
867 struct net_device *dev,
868 struct macsec_rx_sa *rx_sa,
870 struct macsec_secy *secy)
873 struct scatterlist *sg;
874 struct sk_buff *trailer;
876 struct aead_request *req;
877 struct macsec_eth_header *hdr;
879 u16 icv_len = secy->icv_len;
881 macsec_skb_cb(skb)->valid = false;
882 skb = skb_share_check(skb, GFP_ATOMIC);
884 return ERR_PTR(-ENOMEM);
886 ret = skb_cow_data(skb, 0, &trailer);
887 if (unlikely(ret < 0)) {
891 req = macsec_alloc_req(rx_sa->key.tfm, &iv, &sg, ret);
894 return ERR_PTR(-ENOMEM);
897 hdr = (struct macsec_eth_header *)skb->data;
898 hdr_pn = ntohl(hdr->packet_number);
901 pn_t recovered_pn = rx_sa->next_pn_halves;
903 recovered_pn.lower = hdr_pn;
904 if (hdr_pn < rx_sa->next_pn_halves.lower &&
905 !pn_same_half(hdr_pn, rx_sa->next_pn_halves.lower))
906 recovered_pn.upper++;
908 macsec_fill_iv_xpn(iv, rx_sa->ssci, recovered_pn.full64,
911 macsec_fill_iv(iv, sci, hdr_pn);
914 sg_init_table(sg, ret);
915 ret = skb_to_sgvec(skb, sg, 0, skb->len);
916 if (unlikely(ret < 0)) {
917 aead_request_free(req);
922 if (hdr->tci_an & MACSEC_TCI_E) {
923 /* confidentiality: ethernet + macsec header
924 * authenticated, encrypted payload
926 int len = skb->len - macsec_hdr_len(macsec_skb_cb(skb)->has_sci);
928 aead_request_set_crypt(req, sg, sg, len, iv);
929 aead_request_set_ad(req, macsec_hdr_len(macsec_skb_cb(skb)->has_sci));
930 skb = skb_unshare(skb, GFP_ATOMIC);
932 aead_request_free(req);
933 return ERR_PTR(-ENOMEM);
936 /* integrity only: all headers + data authenticated */
937 aead_request_set_crypt(req, sg, sg, icv_len, iv);
938 aead_request_set_ad(req, skb->len - icv_len);
941 macsec_skb_cb(skb)->req = req;
943 aead_request_set_callback(req, 0, macsec_decrypt_done, skb);
946 ret = crypto_aead_decrypt(req);
947 if (ret == -EINPROGRESS) {
949 } else if (ret != 0) {
950 /* decryption/authentication failed
951 * 10.6 if validateFrames is disabled, deliver anyway
953 if (ret != -EBADMSG) {
958 macsec_skb_cb(skb)->valid = true;
962 aead_request_free(req);
967 static struct macsec_rx_sc *find_rx_sc(struct macsec_secy *secy, sci_t sci)
969 struct macsec_rx_sc *rx_sc;
971 for_each_rxsc(secy, rx_sc) {
972 if (rx_sc->sci == sci)
979 static struct macsec_rx_sc *find_rx_sc_rtnl(struct macsec_secy *secy, sci_t sci)
981 struct macsec_rx_sc *rx_sc;
983 for_each_rxsc_rtnl(secy, rx_sc) {
984 if (rx_sc->sci == sci)
991 static enum rx_handler_result handle_not_macsec(struct sk_buff *skb)
993 /* Deliver to the uncontrolled port by default */
994 enum rx_handler_result ret = RX_HANDLER_PASS;
995 struct ethhdr *hdr = eth_hdr(skb);
996 struct metadata_dst *md_dst;
997 struct macsec_rxh_data *rxd;
998 struct macsec_dev *macsec;
1001 rxd = macsec_data_rcu(skb->dev);
1002 md_dst = skb_metadata_dst(skb);
1004 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1005 struct sk_buff *nskb;
1006 struct pcpu_secy_stats *secy_stats = this_cpu_ptr(macsec->stats);
1007 struct net_device *ndev = macsec->secy.netdev;
1009 /* If h/w offloading is enabled, HW decodes frames and strips
1010 * the SecTAG, so we have to deduce which port to deliver to.
1012 if (macsec_is_offloaded(macsec) && netif_running(ndev)) {
1013 struct macsec_rx_sc *rx_sc = NULL;
1015 if (md_dst && md_dst->type == METADATA_MACSEC)
1016 rx_sc = find_rx_sc(&macsec->secy, md_dst->u.macsec_info.sci);
1018 if (md_dst && md_dst->type == METADATA_MACSEC && !rx_sc)
1021 if (ether_addr_equal_64bits(hdr->h_dest,
1023 /* exact match, divert skb to this port */
1025 skb->pkt_type = PACKET_HOST;
1026 ret = RX_HANDLER_ANOTHER;
1028 } else if (is_multicast_ether_addr_64bits(
1030 /* multicast frame, deliver on this port too */
1031 nskb = skb_clone(skb, GFP_ATOMIC);
1036 if (ether_addr_equal_64bits(hdr->h_dest,
1038 nskb->pkt_type = PACKET_BROADCAST;
1040 nskb->pkt_type = PACKET_MULTICAST;
1043 } else if (rx_sc || ndev->flags & IFF_PROMISC) {
1045 skb->pkt_type = PACKET_HOST;
1046 ret = RX_HANDLER_ANOTHER;
1053 /* 10.6 If the management control validateFrames is not
1054 * Strict, frames without a SecTAG are received, counted, and
1055 * delivered to the Controlled Port
1057 if (macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) {
1058 u64_stats_update_begin(&secy_stats->syncp);
1059 secy_stats->stats.InPktsNoTag++;
1060 u64_stats_update_end(&secy_stats->syncp);
1061 DEV_STATS_INC(macsec->secy.netdev, rx_dropped);
1065 /* deliver on this port */
1066 nskb = skb_clone(skb, GFP_ATOMIC);
1072 if (__netif_rx(nskb) == NET_RX_SUCCESS) {
1073 u64_stats_update_begin(&secy_stats->syncp);
1074 secy_stats->stats.InPktsUntagged++;
1075 u64_stats_update_end(&secy_stats->syncp);
1084 static rx_handler_result_t macsec_handle_frame(struct sk_buff **pskb)
1086 struct sk_buff *skb = *pskb;
1087 struct net_device *dev = skb->dev;
1088 struct macsec_eth_header *hdr;
1089 struct macsec_secy *secy = NULL;
1090 struct macsec_rx_sc *rx_sc;
1091 struct macsec_rx_sa *rx_sa;
1092 struct macsec_rxh_data *rxd;
1093 struct macsec_dev *macsec;
1098 struct pcpu_rx_sc_stats *rxsc_stats;
1099 struct pcpu_secy_stats *secy_stats;
1103 if (skb_headroom(skb) < ETH_HLEN)
1106 hdr = macsec_ethhdr(skb);
1107 if (hdr->eth.h_proto != htons(ETH_P_MACSEC))
1108 return handle_not_macsec(skb);
1110 skb = skb_unshare(skb, GFP_ATOMIC);
1113 return RX_HANDLER_CONSUMED;
1115 pulled_sci = pskb_may_pull(skb, macsec_extra_len(true));
1117 if (!pskb_may_pull(skb, macsec_extra_len(false)))
1121 hdr = macsec_ethhdr(skb);
1123 /* Frames with a SecTAG that has the TCI E bit set but the C
1124 * bit clear are discarded, as this reserved encoding is used
1125 * to identify frames with a SecTAG that are not to be
1126 * delivered to the Controlled Port.
1128 if ((hdr->tci_an & (MACSEC_TCI_C | MACSEC_TCI_E)) == MACSEC_TCI_E)
1129 return RX_HANDLER_PASS;
1131 /* now, pull the extra length */
1132 if (hdr->tci_an & MACSEC_TCI_SC) {
1137 /* ethernet header is part of crypto processing */
1138 skb_push(skb, ETH_HLEN);
1140 macsec_skb_cb(skb)->has_sci = !!(hdr->tci_an & MACSEC_TCI_SC);
1141 macsec_skb_cb(skb)->assoc_num = hdr->tci_an & MACSEC_AN_MASK;
1142 sci = macsec_frame_sci(hdr, macsec_skb_cb(skb)->has_sci);
1145 rxd = macsec_data_rcu(skb->dev);
1147 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1148 struct macsec_rx_sc *sc = find_rx_sc(&macsec->secy, sci);
1150 sc = sc ? macsec_rxsc_get(sc) : NULL;
1153 secy = &macsec->secy;
1163 macsec = macsec_priv(dev);
1164 secy_stats = this_cpu_ptr(macsec->stats);
1165 rxsc_stats = this_cpu_ptr(rx_sc->stats);
1167 if (!macsec_validate_skb(skb, secy->icv_len, secy->xpn)) {
1168 u64_stats_update_begin(&secy_stats->syncp);
1169 secy_stats->stats.InPktsBadTag++;
1170 u64_stats_update_end(&secy_stats->syncp);
1171 DEV_STATS_INC(secy->netdev, rx_errors);
1175 rx_sa = macsec_rxsa_get(rx_sc->sa[macsec_skb_cb(skb)->assoc_num]);
1177 /* 10.6.1 if the SA is not in use */
1179 /* If validateFrames is Strict or the C bit in the
1180 * SecTAG is set, discard
1182 struct macsec_rx_sa *active_rx_sa = macsec_active_rxsa_get(rx_sc);
1183 if (hdr->tci_an & MACSEC_TCI_C ||
1184 secy->validate_frames == MACSEC_VALIDATE_STRICT) {
1185 u64_stats_update_begin(&rxsc_stats->syncp);
1186 rxsc_stats->stats.InPktsNotUsingSA++;
1187 u64_stats_update_end(&rxsc_stats->syncp);
1188 DEV_STATS_INC(secy->netdev, rx_errors);
1190 this_cpu_inc(active_rx_sa->stats->InPktsNotUsingSA);
1194 /* not Strict, the frame (with the SecTAG and ICV
1195 * removed) is delivered to the Controlled Port.
1197 u64_stats_update_begin(&rxsc_stats->syncp);
1198 rxsc_stats->stats.InPktsUnusedSA++;
1199 u64_stats_update_end(&rxsc_stats->syncp);
1201 this_cpu_inc(active_rx_sa->stats->InPktsUnusedSA);
1205 /* First, PN check to avoid decrypting obviously wrong packets */
1206 hdr_pn = ntohl(hdr->packet_number);
1207 if (secy->replay_protect) {
1210 spin_lock(&rx_sa->lock);
1211 late = rx_sa->next_pn_halves.lower >= secy->replay_window &&
1212 hdr_pn < (rx_sa->next_pn_halves.lower - secy->replay_window);
1215 late = late && pn_same_half(rx_sa->next_pn_halves.lower, hdr_pn);
1216 spin_unlock(&rx_sa->lock);
1219 u64_stats_update_begin(&rxsc_stats->syncp);
1220 rxsc_stats->stats.InPktsLate++;
1221 u64_stats_update_end(&rxsc_stats->syncp);
1222 DEV_STATS_INC(macsec->secy.netdev, rx_dropped);
1227 macsec_skb_cb(skb)->rx_sa = rx_sa;
1229 /* Disabled && !changed text => skip validation */
1230 if (hdr->tci_an & MACSEC_TCI_C ||
1231 secy->validate_frames != MACSEC_VALIDATE_DISABLED)
1232 skb = macsec_decrypt(skb, dev, rx_sa, sci, secy);
1235 /* the decrypt callback needs the reference */
1236 if (PTR_ERR(skb) != -EINPROGRESS) {
1237 macsec_rxsa_put(rx_sa);
1238 macsec_rxsc_put(rx_sc);
1242 return RX_HANDLER_CONSUMED;
1245 if (!macsec_post_decrypt(skb, secy, hdr_pn))
1249 macsec_finalize_skb(skb, secy->icv_len,
1250 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
1252 macsec_reset_skb(skb, secy->netdev);
1255 macsec_rxsa_put(rx_sa);
1256 macsec_rxsc_put(rx_sc);
1259 ret = gro_cells_receive(&macsec->gro_cells, skb);
1260 if (ret == NET_RX_SUCCESS)
1263 DEV_STATS_INC(macsec->secy.netdev, rx_dropped);
1268 return RX_HANDLER_CONSUMED;
1271 macsec_rxsa_put(rx_sa);
1273 macsec_rxsc_put(rx_sc);
1278 return RX_HANDLER_CONSUMED;
1281 /* 10.6.1 if the SC is not found */
1282 cbit = !!(hdr->tci_an & MACSEC_TCI_C);
1284 macsec_finalize_skb(skb, MACSEC_DEFAULT_ICV_LEN,
1285 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
1287 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1288 struct sk_buff *nskb;
1290 secy_stats = this_cpu_ptr(macsec->stats);
1292 /* If validateFrames is Strict or the C bit in the
1293 * SecTAG is set, discard
1296 macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) {
1297 u64_stats_update_begin(&secy_stats->syncp);
1298 secy_stats->stats.InPktsNoSCI++;
1299 u64_stats_update_end(&secy_stats->syncp);
1300 DEV_STATS_INC(macsec->secy.netdev, rx_errors);
1304 /* not strict, the frame (with the SecTAG and ICV
1305 * removed) is delivered to the Controlled Port.
1307 nskb = skb_clone(skb, GFP_ATOMIC);
1311 macsec_reset_skb(nskb, macsec->secy.netdev);
1313 ret = __netif_rx(nskb);
1314 if (ret == NET_RX_SUCCESS) {
1315 u64_stats_update_begin(&secy_stats->syncp);
1316 secy_stats->stats.InPktsUnknownSCI++;
1317 u64_stats_update_end(&secy_stats->syncp);
1319 DEV_STATS_INC(macsec->secy.netdev, rx_dropped);
1325 return RX_HANDLER_PASS;
1328 static struct crypto_aead *macsec_alloc_tfm(char *key, int key_len, int icv_len)
1330 struct crypto_aead *tfm;
1333 /* Pick a sync gcm(aes) cipher to ensure order is preserved. */
1334 tfm = crypto_alloc_aead("gcm(aes)", 0, CRYPTO_ALG_ASYNC);
1339 ret = crypto_aead_setkey(tfm, key, key_len);
1343 ret = crypto_aead_setauthsize(tfm, icv_len);
1349 crypto_free_aead(tfm);
1350 return ERR_PTR(ret);
1353 static int init_rx_sa(struct macsec_rx_sa *rx_sa, char *sak, int key_len,
1356 rx_sa->stats = alloc_percpu(struct macsec_rx_sa_stats);
1360 rx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len);
1361 if (IS_ERR(rx_sa->key.tfm)) {
1362 free_percpu(rx_sa->stats);
1363 return PTR_ERR(rx_sa->key.tfm);
1366 rx_sa->ssci = MACSEC_UNDEF_SSCI;
1367 rx_sa->active = false;
1369 refcount_set(&rx_sa->refcnt, 1);
1370 spin_lock_init(&rx_sa->lock);
1375 static void clear_rx_sa(struct macsec_rx_sa *rx_sa)
1377 rx_sa->active = false;
1379 macsec_rxsa_put(rx_sa);
1382 static void free_rx_sc(struct macsec_rx_sc *rx_sc)
1386 for (i = 0; i < MACSEC_NUM_AN; i++) {
1387 struct macsec_rx_sa *sa = rtnl_dereference(rx_sc->sa[i]);
1389 RCU_INIT_POINTER(rx_sc->sa[i], NULL);
1394 macsec_rxsc_put(rx_sc);
1397 static struct macsec_rx_sc *del_rx_sc(struct macsec_secy *secy, sci_t sci)
1399 struct macsec_rx_sc *rx_sc, __rcu **rx_scp;
1401 for (rx_scp = &secy->rx_sc, rx_sc = rtnl_dereference(*rx_scp);
1403 rx_scp = &rx_sc->next, rx_sc = rtnl_dereference(*rx_scp)) {
1404 if (rx_sc->sci == sci) {
1407 rcu_assign_pointer(*rx_scp, rx_sc->next);
1415 static struct macsec_rx_sc *create_rx_sc(struct net_device *dev, sci_t sci,
1418 struct macsec_rx_sc *rx_sc;
1419 struct macsec_dev *macsec;
1420 struct net_device *real_dev = macsec_priv(dev)->real_dev;
1421 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
1422 struct macsec_secy *secy;
1424 list_for_each_entry(macsec, &rxd->secys, secys) {
1425 if (find_rx_sc_rtnl(&macsec->secy, sci))
1426 return ERR_PTR(-EEXIST);
1429 rx_sc = kzalloc(sizeof(*rx_sc), GFP_KERNEL);
1431 return ERR_PTR(-ENOMEM);
1433 rx_sc->stats = netdev_alloc_pcpu_stats(struct pcpu_rx_sc_stats);
1434 if (!rx_sc->stats) {
1436 return ERR_PTR(-ENOMEM);
1440 rx_sc->active = active;
1441 refcount_set(&rx_sc->refcnt, 1);
1443 secy = &macsec_priv(dev)->secy;
1444 rcu_assign_pointer(rx_sc->next, secy->rx_sc);
1445 rcu_assign_pointer(secy->rx_sc, rx_sc);
1453 static int init_tx_sa(struct macsec_tx_sa *tx_sa, char *sak, int key_len,
1456 tx_sa->stats = alloc_percpu(struct macsec_tx_sa_stats);
1460 tx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len);
1461 if (IS_ERR(tx_sa->key.tfm)) {
1462 free_percpu(tx_sa->stats);
1463 return PTR_ERR(tx_sa->key.tfm);
1466 tx_sa->ssci = MACSEC_UNDEF_SSCI;
1467 tx_sa->active = false;
1468 refcount_set(&tx_sa->refcnt, 1);
1469 spin_lock_init(&tx_sa->lock);
1474 static void clear_tx_sa(struct macsec_tx_sa *tx_sa)
1476 tx_sa->active = false;
1478 macsec_txsa_put(tx_sa);
1481 static struct genl_family macsec_fam;
1483 static struct net_device *get_dev_from_nl(struct net *net,
1484 struct nlattr **attrs)
1486 int ifindex = nla_get_u32(attrs[MACSEC_ATTR_IFINDEX]);
1487 struct net_device *dev;
1489 dev = __dev_get_by_index(net, ifindex);
1491 return ERR_PTR(-ENODEV);
1493 if (!netif_is_macsec(dev))
1494 return ERR_PTR(-ENODEV);
1499 static enum macsec_offload nla_get_offload(const struct nlattr *nla)
1501 return (__force enum macsec_offload)nla_get_u8(nla);
1504 static sci_t nla_get_sci(const struct nlattr *nla)
1506 return (__force sci_t)nla_get_u64(nla);
1509 static int nla_put_sci(struct sk_buff *skb, int attrtype, sci_t value,
1512 return nla_put_u64_64bit(skb, attrtype, (__force u64)value, padattr);
1515 static ssci_t nla_get_ssci(const struct nlattr *nla)
1517 return (__force ssci_t)nla_get_u32(nla);
1520 static int nla_put_ssci(struct sk_buff *skb, int attrtype, ssci_t value)
1522 return nla_put_u32(skb, attrtype, (__force u64)value);
1525 static struct macsec_tx_sa *get_txsa_from_nl(struct net *net,
1526 struct nlattr **attrs,
1527 struct nlattr **tb_sa,
1528 struct net_device **devp,
1529 struct macsec_secy **secyp,
1530 struct macsec_tx_sc **scp,
1533 struct net_device *dev;
1534 struct macsec_secy *secy;
1535 struct macsec_tx_sc *tx_sc;
1536 struct macsec_tx_sa *tx_sa;
1538 if (!tb_sa[MACSEC_SA_ATTR_AN])
1539 return ERR_PTR(-EINVAL);
1541 *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1543 dev = get_dev_from_nl(net, attrs);
1545 return ERR_CAST(dev);
1547 if (*assoc_num >= MACSEC_NUM_AN)
1548 return ERR_PTR(-EINVAL);
1550 secy = &macsec_priv(dev)->secy;
1551 tx_sc = &secy->tx_sc;
1553 tx_sa = rtnl_dereference(tx_sc->sa[*assoc_num]);
1555 return ERR_PTR(-ENODEV);
1563 static struct macsec_rx_sc *get_rxsc_from_nl(struct net *net,
1564 struct nlattr **attrs,
1565 struct nlattr **tb_rxsc,
1566 struct net_device **devp,
1567 struct macsec_secy **secyp)
1569 struct net_device *dev;
1570 struct macsec_secy *secy;
1571 struct macsec_rx_sc *rx_sc;
1574 dev = get_dev_from_nl(net, attrs);
1576 return ERR_CAST(dev);
1578 secy = &macsec_priv(dev)->secy;
1580 if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI])
1581 return ERR_PTR(-EINVAL);
1583 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1584 rx_sc = find_rx_sc_rtnl(secy, sci);
1586 return ERR_PTR(-ENODEV);
1594 static struct macsec_rx_sa *get_rxsa_from_nl(struct net *net,
1595 struct nlattr **attrs,
1596 struct nlattr **tb_rxsc,
1597 struct nlattr **tb_sa,
1598 struct net_device **devp,
1599 struct macsec_secy **secyp,
1600 struct macsec_rx_sc **scp,
1603 struct macsec_rx_sc *rx_sc;
1604 struct macsec_rx_sa *rx_sa;
1606 if (!tb_sa[MACSEC_SA_ATTR_AN])
1607 return ERR_PTR(-EINVAL);
1609 *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1610 if (*assoc_num >= MACSEC_NUM_AN)
1611 return ERR_PTR(-EINVAL);
1613 rx_sc = get_rxsc_from_nl(net, attrs, tb_rxsc, devp, secyp);
1615 return ERR_CAST(rx_sc);
1617 rx_sa = rtnl_dereference(rx_sc->sa[*assoc_num]);
1619 return ERR_PTR(-ENODEV);
1625 static const struct nla_policy macsec_genl_policy[NUM_MACSEC_ATTR] = {
1626 [MACSEC_ATTR_IFINDEX] = { .type = NLA_U32 },
1627 [MACSEC_ATTR_RXSC_CONFIG] = { .type = NLA_NESTED },
1628 [MACSEC_ATTR_SA_CONFIG] = { .type = NLA_NESTED },
1629 [MACSEC_ATTR_OFFLOAD] = { .type = NLA_NESTED },
1632 static const struct nla_policy macsec_genl_rxsc_policy[NUM_MACSEC_RXSC_ATTR] = {
1633 [MACSEC_RXSC_ATTR_SCI] = { .type = NLA_U64 },
1634 [MACSEC_RXSC_ATTR_ACTIVE] = { .type = NLA_U8 },
1637 static const struct nla_policy macsec_genl_sa_policy[NUM_MACSEC_SA_ATTR] = {
1638 [MACSEC_SA_ATTR_AN] = { .type = NLA_U8 },
1639 [MACSEC_SA_ATTR_ACTIVE] = { .type = NLA_U8 },
1640 [MACSEC_SA_ATTR_PN] = NLA_POLICY_MIN_LEN(4),
1641 [MACSEC_SA_ATTR_KEYID] = { .type = NLA_BINARY,
1642 .len = MACSEC_KEYID_LEN, },
1643 [MACSEC_SA_ATTR_KEY] = { .type = NLA_BINARY,
1644 .len = MACSEC_MAX_KEY_LEN, },
1645 [MACSEC_SA_ATTR_SSCI] = { .type = NLA_U32 },
1646 [MACSEC_SA_ATTR_SALT] = { .type = NLA_BINARY,
1647 .len = MACSEC_SALT_LEN, },
1650 static const struct nla_policy macsec_genl_offload_policy[NUM_MACSEC_OFFLOAD_ATTR] = {
1651 [MACSEC_OFFLOAD_ATTR_TYPE] = { .type = NLA_U8 },
1654 /* Offloads an operation to a device driver */
1655 static int macsec_offload(int (* const func)(struct macsec_context *),
1656 struct macsec_context *ctx)
1660 if (unlikely(!func))
1663 if (ctx->offload == MACSEC_OFFLOAD_PHY)
1664 mutex_lock(&ctx->phydev->lock);
1668 if (ctx->offload == MACSEC_OFFLOAD_PHY)
1669 mutex_unlock(&ctx->phydev->lock);
1674 static int parse_sa_config(struct nlattr **attrs, struct nlattr **tb_sa)
1676 if (!attrs[MACSEC_ATTR_SA_CONFIG])
1679 if (nla_parse_nested_deprecated(tb_sa, MACSEC_SA_ATTR_MAX, attrs[MACSEC_ATTR_SA_CONFIG], macsec_genl_sa_policy, NULL))
1685 static int parse_rxsc_config(struct nlattr **attrs, struct nlattr **tb_rxsc)
1687 if (!attrs[MACSEC_ATTR_RXSC_CONFIG])
1690 if (nla_parse_nested_deprecated(tb_rxsc, MACSEC_RXSC_ATTR_MAX, attrs[MACSEC_ATTR_RXSC_CONFIG], macsec_genl_rxsc_policy, NULL))
1696 static bool validate_add_rxsa(struct nlattr **attrs)
1698 if (!attrs[MACSEC_SA_ATTR_AN] ||
1699 !attrs[MACSEC_SA_ATTR_KEY] ||
1700 !attrs[MACSEC_SA_ATTR_KEYID])
1703 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
1706 if (attrs[MACSEC_SA_ATTR_PN] &&
1707 nla_get_u64(attrs[MACSEC_SA_ATTR_PN]) == 0)
1710 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
1711 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
1715 if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN)
1721 static int macsec_add_rxsa(struct sk_buff *skb, struct genl_info *info)
1723 struct net_device *dev;
1724 struct nlattr **attrs = info->attrs;
1725 struct macsec_secy *secy;
1726 struct macsec_rx_sc *rx_sc;
1727 struct macsec_rx_sa *rx_sa;
1728 unsigned char assoc_num;
1730 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1731 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1734 if (!attrs[MACSEC_ATTR_IFINDEX])
1737 if (parse_sa_config(attrs, tb_sa))
1740 if (parse_rxsc_config(attrs, tb_rxsc))
1743 if (!validate_add_rxsa(tb_sa))
1747 rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy);
1748 if (IS_ERR(rx_sc)) {
1750 return PTR_ERR(rx_sc);
1753 assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1755 if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) {
1756 pr_notice("macsec: nl: add_rxsa: bad key length: %d != %d\n",
1757 nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len);
1762 pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
1763 if (tb_sa[MACSEC_SA_ATTR_PN] &&
1764 nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
1765 pr_notice("macsec: nl: add_rxsa: bad pn length: %d != %d\n",
1766 nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
1772 if (!tb_sa[MACSEC_SA_ATTR_SSCI] || !tb_sa[MACSEC_SA_ATTR_SALT]) {
1777 if (nla_len(tb_sa[MACSEC_SA_ATTR_SALT]) != MACSEC_SALT_LEN) {
1778 pr_notice("macsec: nl: add_rxsa: bad salt length: %d != %d\n",
1779 nla_len(tb_sa[MACSEC_SA_ATTR_SALT]),
1786 rx_sa = rtnl_dereference(rx_sc->sa[assoc_num]);
1792 rx_sa = kmalloc(sizeof(*rx_sa), GFP_KERNEL);
1798 err = init_rx_sa(rx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
1799 secy->key_len, secy->icv_len);
1806 if (tb_sa[MACSEC_SA_ATTR_PN]) {
1807 spin_lock_bh(&rx_sa->lock);
1808 rx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
1809 spin_unlock_bh(&rx_sa->lock);
1812 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
1813 rx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
1818 rx_sa->ssci = nla_get_ssci(tb_sa[MACSEC_SA_ATTR_SSCI]);
1819 nla_memcpy(rx_sa->key.salt.bytes, tb_sa[MACSEC_SA_ATTR_SALT],
1823 /* If h/w offloading is available, propagate to the device */
1824 if (macsec_is_offloaded(netdev_priv(dev))) {
1825 const struct macsec_ops *ops;
1826 struct macsec_context ctx;
1828 ops = macsec_get_ops(netdev_priv(dev), &ctx);
1834 ctx.sa.assoc_num = assoc_num;
1835 ctx.sa.rx_sa = rx_sa;
1837 memcpy(ctx.sa.key, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
1840 err = macsec_offload(ops->mdo_add_rxsa, &ctx);
1841 memzero_explicit(ctx.sa.key, secy->key_len);
1846 nla_memcpy(rx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN);
1847 rcu_assign_pointer(rx_sc->sa[assoc_num], rx_sa);
1854 macsec_rxsa_put(rx_sa);
1859 static bool validate_add_rxsc(struct nlattr **attrs)
1861 if (!attrs[MACSEC_RXSC_ATTR_SCI])
1864 if (attrs[MACSEC_RXSC_ATTR_ACTIVE]) {
1865 if (nla_get_u8(attrs[MACSEC_RXSC_ATTR_ACTIVE]) > 1)
1872 static int macsec_add_rxsc(struct sk_buff *skb, struct genl_info *info)
1874 struct net_device *dev;
1875 sci_t sci = MACSEC_UNDEF_SCI;
1876 struct nlattr **attrs = info->attrs;
1877 struct macsec_rx_sc *rx_sc;
1878 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1879 struct macsec_secy *secy;
1883 if (!attrs[MACSEC_ATTR_IFINDEX])
1886 if (parse_rxsc_config(attrs, tb_rxsc))
1889 if (!validate_add_rxsc(tb_rxsc))
1893 dev = get_dev_from_nl(genl_info_net(info), attrs);
1896 return PTR_ERR(dev);
1899 secy = &macsec_priv(dev)->secy;
1900 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1902 if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE])
1903 active = nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]);
1905 rx_sc = create_rx_sc(dev, sci, active);
1906 if (IS_ERR(rx_sc)) {
1908 return PTR_ERR(rx_sc);
1911 if (macsec_is_offloaded(netdev_priv(dev))) {
1912 const struct macsec_ops *ops;
1913 struct macsec_context ctx;
1915 ops = macsec_get_ops(netdev_priv(dev), &ctx);
1924 ret = macsec_offload(ops->mdo_add_rxsc, &ctx);
1934 del_rx_sc(secy, sci);
1940 static bool validate_add_txsa(struct nlattr **attrs)
1942 if (!attrs[MACSEC_SA_ATTR_AN] ||
1943 !attrs[MACSEC_SA_ATTR_PN] ||
1944 !attrs[MACSEC_SA_ATTR_KEY] ||
1945 !attrs[MACSEC_SA_ATTR_KEYID])
1948 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
1951 if (nla_get_u64(attrs[MACSEC_SA_ATTR_PN]) == 0)
1954 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
1955 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
1959 if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN)
1965 static int macsec_add_txsa(struct sk_buff *skb, struct genl_info *info)
1967 struct net_device *dev;
1968 struct nlattr **attrs = info->attrs;
1969 struct macsec_secy *secy;
1970 struct macsec_tx_sc *tx_sc;
1971 struct macsec_tx_sa *tx_sa;
1972 unsigned char assoc_num;
1974 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1975 bool was_operational;
1978 if (!attrs[MACSEC_ATTR_IFINDEX])
1981 if (parse_sa_config(attrs, tb_sa))
1984 if (!validate_add_txsa(tb_sa))
1988 dev = get_dev_from_nl(genl_info_net(info), attrs);
1991 return PTR_ERR(dev);
1994 secy = &macsec_priv(dev)->secy;
1995 tx_sc = &secy->tx_sc;
1997 assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1999 if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) {
2000 pr_notice("macsec: nl: add_txsa: bad key length: %d != %d\n",
2001 nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len);
2006 pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
2007 if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
2008 pr_notice("macsec: nl: add_txsa: bad pn length: %d != %d\n",
2009 nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
2015 if (!tb_sa[MACSEC_SA_ATTR_SSCI] || !tb_sa[MACSEC_SA_ATTR_SALT]) {
2020 if (nla_len(tb_sa[MACSEC_SA_ATTR_SALT]) != MACSEC_SALT_LEN) {
2021 pr_notice("macsec: nl: add_txsa: bad salt length: %d != %d\n",
2022 nla_len(tb_sa[MACSEC_SA_ATTR_SALT]),
2029 tx_sa = rtnl_dereference(tx_sc->sa[assoc_num]);
2035 tx_sa = kmalloc(sizeof(*tx_sa), GFP_KERNEL);
2041 err = init_tx_sa(tx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
2042 secy->key_len, secy->icv_len);
2049 spin_lock_bh(&tx_sa->lock);
2050 tx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
2051 spin_unlock_bh(&tx_sa->lock);
2053 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2054 tx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2056 was_operational = secy->operational;
2057 if (assoc_num == tx_sc->encoding_sa && tx_sa->active)
2058 secy->operational = true;
2061 tx_sa->ssci = nla_get_ssci(tb_sa[MACSEC_SA_ATTR_SSCI]);
2062 nla_memcpy(tx_sa->key.salt.bytes, tb_sa[MACSEC_SA_ATTR_SALT],
2066 /* If h/w offloading is available, propagate to the device */
2067 if (macsec_is_offloaded(netdev_priv(dev))) {
2068 const struct macsec_ops *ops;
2069 struct macsec_context ctx;
2071 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2077 ctx.sa.assoc_num = assoc_num;
2078 ctx.sa.tx_sa = tx_sa;
2080 memcpy(ctx.sa.key, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
2083 err = macsec_offload(ops->mdo_add_txsa, &ctx);
2084 memzero_explicit(ctx.sa.key, secy->key_len);
2089 nla_memcpy(tx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN);
2090 rcu_assign_pointer(tx_sc->sa[assoc_num], tx_sa);
2097 secy->operational = was_operational;
2098 macsec_txsa_put(tx_sa);
2103 static int macsec_del_rxsa(struct sk_buff *skb, struct genl_info *info)
2105 struct nlattr **attrs = info->attrs;
2106 struct net_device *dev;
2107 struct macsec_secy *secy;
2108 struct macsec_rx_sc *rx_sc;
2109 struct macsec_rx_sa *rx_sa;
2111 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2112 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2115 if (!attrs[MACSEC_ATTR_IFINDEX])
2118 if (parse_sa_config(attrs, tb_sa))
2121 if (parse_rxsc_config(attrs, tb_rxsc))
2125 rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa,
2126 &dev, &secy, &rx_sc, &assoc_num);
2127 if (IS_ERR(rx_sa)) {
2129 return PTR_ERR(rx_sa);
2132 if (rx_sa->active) {
2137 /* If h/w offloading is available, propagate to the device */
2138 if (macsec_is_offloaded(netdev_priv(dev))) {
2139 const struct macsec_ops *ops;
2140 struct macsec_context ctx;
2142 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2148 ctx.sa.assoc_num = assoc_num;
2149 ctx.sa.rx_sa = rx_sa;
2152 ret = macsec_offload(ops->mdo_del_rxsa, &ctx);
2157 RCU_INIT_POINTER(rx_sc->sa[assoc_num], NULL);
2169 static int macsec_del_rxsc(struct sk_buff *skb, struct genl_info *info)
2171 struct nlattr **attrs = info->attrs;
2172 struct net_device *dev;
2173 struct macsec_secy *secy;
2174 struct macsec_rx_sc *rx_sc;
2176 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2179 if (!attrs[MACSEC_ATTR_IFINDEX])
2182 if (parse_rxsc_config(attrs, tb_rxsc))
2185 if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI])
2189 dev = get_dev_from_nl(genl_info_net(info), info->attrs);
2192 return PTR_ERR(dev);
2195 secy = &macsec_priv(dev)->secy;
2196 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
2198 rx_sc = del_rx_sc(secy, sci);
2204 /* If h/w offloading is available, propagate to the device */
2205 if (macsec_is_offloaded(netdev_priv(dev))) {
2206 const struct macsec_ops *ops;
2207 struct macsec_context ctx;
2209 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2217 ret = macsec_offload(ops->mdo_del_rxsc, &ctx);
2232 static int macsec_del_txsa(struct sk_buff *skb, struct genl_info *info)
2234 struct nlattr **attrs = info->attrs;
2235 struct net_device *dev;
2236 struct macsec_secy *secy;
2237 struct macsec_tx_sc *tx_sc;
2238 struct macsec_tx_sa *tx_sa;
2240 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2243 if (!attrs[MACSEC_ATTR_IFINDEX])
2246 if (parse_sa_config(attrs, tb_sa))
2250 tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa,
2251 &dev, &secy, &tx_sc, &assoc_num);
2252 if (IS_ERR(tx_sa)) {
2254 return PTR_ERR(tx_sa);
2257 if (tx_sa->active) {
2262 /* If h/w offloading is available, propagate to the device */
2263 if (macsec_is_offloaded(netdev_priv(dev))) {
2264 const struct macsec_ops *ops;
2265 struct macsec_context ctx;
2267 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2273 ctx.sa.assoc_num = assoc_num;
2274 ctx.sa.tx_sa = tx_sa;
2277 ret = macsec_offload(ops->mdo_del_txsa, &ctx);
2282 RCU_INIT_POINTER(tx_sc->sa[assoc_num], NULL);
2294 static bool validate_upd_sa(struct nlattr **attrs)
2296 if (!attrs[MACSEC_SA_ATTR_AN] ||
2297 attrs[MACSEC_SA_ATTR_KEY] ||
2298 attrs[MACSEC_SA_ATTR_KEYID] ||
2299 attrs[MACSEC_SA_ATTR_SSCI] ||
2300 attrs[MACSEC_SA_ATTR_SALT])
2303 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
2306 if (attrs[MACSEC_SA_ATTR_PN] && nla_get_u64(attrs[MACSEC_SA_ATTR_PN]) == 0)
2309 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
2310 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
2317 static int macsec_upd_txsa(struct sk_buff *skb, struct genl_info *info)
2319 struct nlattr **attrs = info->attrs;
2320 struct net_device *dev;
2321 struct macsec_secy *secy;
2322 struct macsec_tx_sc *tx_sc;
2323 struct macsec_tx_sa *tx_sa;
2325 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2326 bool was_operational, was_active;
2332 if (!attrs[MACSEC_ATTR_IFINDEX])
2335 if (parse_sa_config(attrs, tb_sa))
2338 if (!validate_upd_sa(tb_sa))
2342 tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa,
2343 &dev, &secy, &tx_sc, &assoc_num);
2344 if (IS_ERR(tx_sa)) {
2346 return PTR_ERR(tx_sa);
2349 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2352 pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
2353 if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
2354 pr_notice("macsec: nl: upd_txsa: bad pn length: %d != %d\n",
2355 nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
2360 spin_lock_bh(&tx_sa->lock);
2361 prev_pn = tx_sa->next_pn_halves;
2362 tx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
2363 spin_unlock_bh(&tx_sa->lock);
2366 was_active = tx_sa->active;
2367 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2368 tx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2370 was_operational = secy->operational;
2371 if (assoc_num == tx_sc->encoding_sa)
2372 secy->operational = tx_sa->active;
2374 /* If h/w offloading is available, propagate to the device */
2375 if (macsec_is_offloaded(netdev_priv(dev))) {
2376 const struct macsec_ops *ops;
2377 struct macsec_context ctx;
2379 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2385 ctx.sa.assoc_num = assoc_num;
2386 ctx.sa.tx_sa = tx_sa;
2389 ret = macsec_offload(ops->mdo_upd_txsa, &ctx);
2399 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2400 spin_lock_bh(&tx_sa->lock);
2401 tx_sa->next_pn_halves = prev_pn;
2402 spin_unlock_bh(&tx_sa->lock);
2404 tx_sa->active = was_active;
2405 secy->operational = was_operational;
2410 static int macsec_upd_rxsa(struct sk_buff *skb, struct genl_info *info)
2412 struct nlattr **attrs = info->attrs;
2413 struct net_device *dev;
2414 struct macsec_secy *secy;
2415 struct macsec_rx_sc *rx_sc;
2416 struct macsec_rx_sa *rx_sa;
2418 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2419 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2426 if (!attrs[MACSEC_ATTR_IFINDEX])
2429 if (parse_rxsc_config(attrs, tb_rxsc))
2432 if (parse_sa_config(attrs, tb_sa))
2435 if (!validate_upd_sa(tb_sa))
2439 rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa,
2440 &dev, &secy, &rx_sc, &assoc_num);
2441 if (IS_ERR(rx_sa)) {
2443 return PTR_ERR(rx_sa);
2446 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2449 pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
2450 if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
2451 pr_notice("macsec: nl: upd_rxsa: bad pn length: %d != %d\n",
2452 nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
2457 spin_lock_bh(&rx_sa->lock);
2458 prev_pn = rx_sa->next_pn_halves;
2459 rx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
2460 spin_unlock_bh(&rx_sa->lock);
2463 was_active = rx_sa->active;
2464 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2465 rx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2467 /* If h/w offloading is available, propagate to the device */
2468 if (macsec_is_offloaded(netdev_priv(dev))) {
2469 const struct macsec_ops *ops;
2470 struct macsec_context ctx;
2472 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2478 ctx.sa.assoc_num = assoc_num;
2479 ctx.sa.rx_sa = rx_sa;
2482 ret = macsec_offload(ops->mdo_upd_rxsa, &ctx);
2491 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2492 spin_lock_bh(&rx_sa->lock);
2493 rx_sa->next_pn_halves = prev_pn;
2494 spin_unlock_bh(&rx_sa->lock);
2496 rx_sa->active = was_active;
2501 static int macsec_upd_rxsc(struct sk_buff *skb, struct genl_info *info)
2503 struct nlattr **attrs = info->attrs;
2504 struct net_device *dev;
2505 struct macsec_secy *secy;
2506 struct macsec_rx_sc *rx_sc;
2507 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2508 unsigned int prev_n_rx_sc;
2512 if (!attrs[MACSEC_ATTR_IFINDEX])
2515 if (parse_rxsc_config(attrs, tb_rxsc))
2518 if (!validate_add_rxsc(tb_rxsc))
2522 rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy);
2523 if (IS_ERR(rx_sc)) {
2525 return PTR_ERR(rx_sc);
2528 was_active = rx_sc->active;
2529 prev_n_rx_sc = secy->n_rx_sc;
2530 if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]) {
2531 bool new = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]);
2533 if (rx_sc->active != new)
2534 secy->n_rx_sc += new ? 1 : -1;
2536 rx_sc->active = new;
2539 /* If h/w offloading is available, propagate to the device */
2540 if (macsec_is_offloaded(netdev_priv(dev))) {
2541 const struct macsec_ops *ops;
2542 struct macsec_context ctx;
2544 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2553 ret = macsec_offload(ops->mdo_upd_rxsc, &ctx);
2563 secy->n_rx_sc = prev_n_rx_sc;
2564 rx_sc->active = was_active;
2569 static bool macsec_is_configured(struct macsec_dev *macsec)
2571 struct macsec_secy *secy = &macsec->secy;
2572 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
2578 for (i = 0; i < MACSEC_NUM_AN; i++)
2585 static int macsec_update_offload(struct net_device *dev, enum macsec_offload offload)
2587 enum macsec_offload prev_offload;
2588 const struct macsec_ops *ops;
2589 struct macsec_context ctx;
2590 struct macsec_dev *macsec;
2593 macsec = macsec_priv(dev);
2595 /* Check if the offloading mode is supported by the underlying layers */
2596 if (offload != MACSEC_OFFLOAD_OFF &&
2597 !macsec_check_offload(offload, macsec))
2600 /* Check if the net device is busy. */
2601 if (netif_running(dev))
2604 /* Check if the device already has rules configured: we do not support
2607 if (macsec_is_configured(macsec))
2610 prev_offload = macsec->offload;
2612 ops = __macsec_get_ops(offload == MACSEC_OFFLOAD_OFF ? prev_offload : offload,
2617 macsec->offload = offload;
2619 ctx.secy = &macsec->secy;
2620 ret = offload == MACSEC_OFFLOAD_OFF ? macsec_offload(ops->mdo_del_secy, &ctx)
2621 : macsec_offload(ops->mdo_add_secy, &ctx);
2623 macsec->offload = prev_offload;
2628 static int macsec_upd_offload(struct sk_buff *skb, struct genl_info *info)
2630 struct nlattr *tb_offload[MACSEC_OFFLOAD_ATTR_MAX + 1];
2631 struct nlattr **attrs = info->attrs;
2632 enum macsec_offload offload;
2633 struct macsec_dev *macsec;
2634 struct net_device *dev;
2637 if (!attrs[MACSEC_ATTR_IFINDEX])
2640 if (!attrs[MACSEC_ATTR_OFFLOAD])
2643 if (nla_parse_nested_deprecated(tb_offload, MACSEC_OFFLOAD_ATTR_MAX,
2644 attrs[MACSEC_ATTR_OFFLOAD],
2645 macsec_genl_offload_policy, NULL))
2650 dev = get_dev_from_nl(genl_info_net(info), attrs);
2655 macsec = macsec_priv(dev);
2657 if (!tb_offload[MACSEC_OFFLOAD_ATTR_TYPE]) {
2662 offload = nla_get_u8(tb_offload[MACSEC_OFFLOAD_ATTR_TYPE]);
2664 if (macsec->offload != offload)
2665 ret = macsec_update_offload(dev, offload);
2671 static void get_tx_sa_stats(struct net_device *dev, int an,
2672 struct macsec_tx_sa *tx_sa,
2673 struct macsec_tx_sa_stats *sum)
2675 struct macsec_dev *macsec = macsec_priv(dev);
2678 /* If h/w offloading is available, propagate to the device */
2679 if (macsec_is_offloaded(macsec)) {
2680 const struct macsec_ops *ops;
2681 struct macsec_context ctx;
2683 ops = macsec_get_ops(macsec, &ctx);
2685 ctx.sa.assoc_num = an;
2686 ctx.sa.tx_sa = tx_sa;
2687 ctx.stats.tx_sa_stats = sum;
2688 ctx.secy = &macsec_priv(dev)->secy;
2689 macsec_offload(ops->mdo_get_tx_sa_stats, &ctx);
2694 for_each_possible_cpu(cpu) {
2695 const struct macsec_tx_sa_stats *stats =
2696 per_cpu_ptr(tx_sa->stats, cpu);
2698 sum->OutPktsProtected += stats->OutPktsProtected;
2699 sum->OutPktsEncrypted += stats->OutPktsEncrypted;
2703 static int copy_tx_sa_stats(struct sk_buff *skb, struct macsec_tx_sa_stats *sum)
2705 if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_PROTECTED,
2706 sum->OutPktsProtected) ||
2707 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_ENCRYPTED,
2708 sum->OutPktsEncrypted))
2714 static void get_rx_sa_stats(struct net_device *dev,
2715 struct macsec_rx_sc *rx_sc, int an,
2716 struct macsec_rx_sa *rx_sa,
2717 struct macsec_rx_sa_stats *sum)
2719 struct macsec_dev *macsec = macsec_priv(dev);
2722 /* If h/w offloading is available, propagate to the device */
2723 if (macsec_is_offloaded(macsec)) {
2724 const struct macsec_ops *ops;
2725 struct macsec_context ctx;
2727 ops = macsec_get_ops(macsec, &ctx);
2729 ctx.sa.assoc_num = an;
2730 ctx.sa.rx_sa = rx_sa;
2731 ctx.stats.rx_sa_stats = sum;
2732 ctx.secy = &macsec_priv(dev)->secy;
2734 macsec_offload(ops->mdo_get_rx_sa_stats, &ctx);
2739 for_each_possible_cpu(cpu) {
2740 const struct macsec_rx_sa_stats *stats =
2741 per_cpu_ptr(rx_sa->stats, cpu);
2743 sum->InPktsOK += stats->InPktsOK;
2744 sum->InPktsInvalid += stats->InPktsInvalid;
2745 sum->InPktsNotValid += stats->InPktsNotValid;
2746 sum->InPktsNotUsingSA += stats->InPktsNotUsingSA;
2747 sum->InPktsUnusedSA += stats->InPktsUnusedSA;
2751 static int copy_rx_sa_stats(struct sk_buff *skb,
2752 struct macsec_rx_sa_stats *sum)
2754 if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_OK, sum->InPktsOK) ||
2755 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_INVALID,
2756 sum->InPktsInvalid) ||
2757 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_VALID,
2758 sum->InPktsNotValid) ||
2759 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_USING_SA,
2760 sum->InPktsNotUsingSA) ||
2761 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_UNUSED_SA,
2762 sum->InPktsUnusedSA))
2768 static void get_rx_sc_stats(struct net_device *dev,
2769 struct macsec_rx_sc *rx_sc,
2770 struct macsec_rx_sc_stats *sum)
2772 struct macsec_dev *macsec = macsec_priv(dev);
2775 /* If h/w offloading is available, propagate to the device */
2776 if (macsec_is_offloaded(macsec)) {
2777 const struct macsec_ops *ops;
2778 struct macsec_context ctx;
2780 ops = macsec_get_ops(macsec, &ctx);
2782 ctx.stats.rx_sc_stats = sum;
2783 ctx.secy = &macsec_priv(dev)->secy;
2785 macsec_offload(ops->mdo_get_rx_sc_stats, &ctx);
2790 for_each_possible_cpu(cpu) {
2791 const struct pcpu_rx_sc_stats *stats;
2792 struct macsec_rx_sc_stats tmp;
2795 stats = per_cpu_ptr(rx_sc->stats, cpu);
2797 start = u64_stats_fetch_begin(&stats->syncp);
2798 memcpy(&tmp, &stats->stats, sizeof(tmp));
2799 } while (u64_stats_fetch_retry(&stats->syncp, start));
2801 sum->InOctetsValidated += tmp.InOctetsValidated;
2802 sum->InOctetsDecrypted += tmp.InOctetsDecrypted;
2803 sum->InPktsUnchecked += tmp.InPktsUnchecked;
2804 sum->InPktsDelayed += tmp.InPktsDelayed;
2805 sum->InPktsOK += tmp.InPktsOK;
2806 sum->InPktsInvalid += tmp.InPktsInvalid;
2807 sum->InPktsLate += tmp.InPktsLate;
2808 sum->InPktsNotValid += tmp.InPktsNotValid;
2809 sum->InPktsNotUsingSA += tmp.InPktsNotUsingSA;
2810 sum->InPktsUnusedSA += tmp.InPktsUnusedSA;
2814 static int copy_rx_sc_stats(struct sk_buff *skb, struct macsec_rx_sc_stats *sum)
2816 if (nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_VALIDATED,
2817 sum->InOctetsValidated,
2818 MACSEC_RXSC_STATS_ATTR_PAD) ||
2819 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_DECRYPTED,
2820 sum->InOctetsDecrypted,
2821 MACSEC_RXSC_STATS_ATTR_PAD) ||
2822 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNCHECKED,
2823 sum->InPktsUnchecked,
2824 MACSEC_RXSC_STATS_ATTR_PAD) ||
2825 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_DELAYED,
2827 MACSEC_RXSC_STATS_ATTR_PAD) ||
2828 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_OK,
2830 MACSEC_RXSC_STATS_ATTR_PAD) ||
2831 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_INVALID,
2833 MACSEC_RXSC_STATS_ATTR_PAD) ||
2834 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_LATE,
2836 MACSEC_RXSC_STATS_ATTR_PAD) ||
2837 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_VALID,
2838 sum->InPktsNotValid,
2839 MACSEC_RXSC_STATS_ATTR_PAD) ||
2840 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_USING_SA,
2841 sum->InPktsNotUsingSA,
2842 MACSEC_RXSC_STATS_ATTR_PAD) ||
2843 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNUSED_SA,
2844 sum->InPktsUnusedSA,
2845 MACSEC_RXSC_STATS_ATTR_PAD))
2851 static void get_tx_sc_stats(struct net_device *dev,
2852 struct macsec_tx_sc_stats *sum)
2854 struct macsec_dev *macsec = macsec_priv(dev);
2857 /* If h/w offloading is available, propagate to the device */
2858 if (macsec_is_offloaded(macsec)) {
2859 const struct macsec_ops *ops;
2860 struct macsec_context ctx;
2862 ops = macsec_get_ops(macsec, &ctx);
2864 ctx.stats.tx_sc_stats = sum;
2865 ctx.secy = &macsec_priv(dev)->secy;
2866 macsec_offload(ops->mdo_get_tx_sc_stats, &ctx);
2871 for_each_possible_cpu(cpu) {
2872 const struct pcpu_tx_sc_stats *stats;
2873 struct macsec_tx_sc_stats tmp;
2876 stats = per_cpu_ptr(macsec_priv(dev)->secy.tx_sc.stats, cpu);
2878 start = u64_stats_fetch_begin(&stats->syncp);
2879 memcpy(&tmp, &stats->stats, sizeof(tmp));
2880 } while (u64_stats_fetch_retry(&stats->syncp, start));
2882 sum->OutPktsProtected += tmp.OutPktsProtected;
2883 sum->OutPktsEncrypted += tmp.OutPktsEncrypted;
2884 sum->OutOctetsProtected += tmp.OutOctetsProtected;
2885 sum->OutOctetsEncrypted += tmp.OutOctetsEncrypted;
2889 static int copy_tx_sc_stats(struct sk_buff *skb, struct macsec_tx_sc_stats *sum)
2891 if (nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_PROTECTED,
2892 sum->OutPktsProtected,
2893 MACSEC_TXSC_STATS_ATTR_PAD) ||
2894 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_ENCRYPTED,
2895 sum->OutPktsEncrypted,
2896 MACSEC_TXSC_STATS_ATTR_PAD) ||
2897 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_PROTECTED,
2898 sum->OutOctetsProtected,
2899 MACSEC_TXSC_STATS_ATTR_PAD) ||
2900 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_ENCRYPTED,
2901 sum->OutOctetsEncrypted,
2902 MACSEC_TXSC_STATS_ATTR_PAD))
2908 static void get_secy_stats(struct net_device *dev, struct macsec_dev_stats *sum)
2910 struct macsec_dev *macsec = macsec_priv(dev);
2913 /* If h/w offloading is available, propagate to the device */
2914 if (macsec_is_offloaded(macsec)) {
2915 const struct macsec_ops *ops;
2916 struct macsec_context ctx;
2918 ops = macsec_get_ops(macsec, &ctx);
2920 ctx.stats.dev_stats = sum;
2921 ctx.secy = &macsec_priv(dev)->secy;
2922 macsec_offload(ops->mdo_get_dev_stats, &ctx);
2927 for_each_possible_cpu(cpu) {
2928 const struct pcpu_secy_stats *stats;
2929 struct macsec_dev_stats tmp;
2932 stats = per_cpu_ptr(macsec_priv(dev)->stats, cpu);
2934 start = u64_stats_fetch_begin(&stats->syncp);
2935 memcpy(&tmp, &stats->stats, sizeof(tmp));
2936 } while (u64_stats_fetch_retry(&stats->syncp, start));
2938 sum->OutPktsUntagged += tmp.OutPktsUntagged;
2939 sum->InPktsUntagged += tmp.InPktsUntagged;
2940 sum->OutPktsTooLong += tmp.OutPktsTooLong;
2941 sum->InPktsNoTag += tmp.InPktsNoTag;
2942 sum->InPktsBadTag += tmp.InPktsBadTag;
2943 sum->InPktsUnknownSCI += tmp.InPktsUnknownSCI;
2944 sum->InPktsNoSCI += tmp.InPktsNoSCI;
2945 sum->InPktsOverrun += tmp.InPktsOverrun;
2949 static int copy_secy_stats(struct sk_buff *skb, struct macsec_dev_stats *sum)
2951 if (nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_UNTAGGED,
2952 sum->OutPktsUntagged,
2953 MACSEC_SECY_STATS_ATTR_PAD) ||
2954 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNTAGGED,
2955 sum->InPktsUntagged,
2956 MACSEC_SECY_STATS_ATTR_PAD) ||
2957 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_TOO_LONG,
2958 sum->OutPktsTooLong,
2959 MACSEC_SECY_STATS_ATTR_PAD) ||
2960 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_TAG,
2962 MACSEC_SECY_STATS_ATTR_PAD) ||
2963 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_BAD_TAG,
2965 MACSEC_SECY_STATS_ATTR_PAD) ||
2966 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNKNOWN_SCI,
2967 sum->InPktsUnknownSCI,
2968 MACSEC_SECY_STATS_ATTR_PAD) ||
2969 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_SCI,
2971 MACSEC_SECY_STATS_ATTR_PAD) ||
2972 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_OVERRUN,
2974 MACSEC_SECY_STATS_ATTR_PAD))
2980 static int nla_put_secy(struct macsec_secy *secy, struct sk_buff *skb)
2982 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
2983 struct nlattr *secy_nest = nla_nest_start_noflag(skb,
2990 switch (secy->key_len) {
2991 case MACSEC_GCM_AES_128_SAK_LEN:
2992 csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_128 : MACSEC_DEFAULT_CIPHER_ID;
2994 case MACSEC_GCM_AES_256_SAK_LEN:
2995 csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_256 : MACSEC_CIPHER_ID_GCM_AES_256;
3001 if (nla_put_sci(skb, MACSEC_SECY_ATTR_SCI, secy->sci,
3002 MACSEC_SECY_ATTR_PAD) ||
3003 nla_put_u64_64bit(skb, MACSEC_SECY_ATTR_CIPHER_SUITE,
3004 csid, MACSEC_SECY_ATTR_PAD) ||
3005 nla_put_u8(skb, MACSEC_SECY_ATTR_ICV_LEN, secy->icv_len) ||
3006 nla_put_u8(skb, MACSEC_SECY_ATTR_OPER, secy->operational) ||
3007 nla_put_u8(skb, MACSEC_SECY_ATTR_PROTECT, secy->protect_frames) ||
3008 nla_put_u8(skb, MACSEC_SECY_ATTR_REPLAY, secy->replay_protect) ||
3009 nla_put_u8(skb, MACSEC_SECY_ATTR_VALIDATE, secy->validate_frames) ||
3010 nla_put_u8(skb, MACSEC_SECY_ATTR_ENCRYPT, tx_sc->encrypt) ||
3011 nla_put_u8(skb, MACSEC_SECY_ATTR_INC_SCI, tx_sc->send_sci) ||
3012 nla_put_u8(skb, MACSEC_SECY_ATTR_ES, tx_sc->end_station) ||
3013 nla_put_u8(skb, MACSEC_SECY_ATTR_SCB, tx_sc->scb) ||
3014 nla_put_u8(skb, MACSEC_SECY_ATTR_ENCODING_SA, tx_sc->encoding_sa))
3017 if (secy->replay_protect) {
3018 if (nla_put_u32(skb, MACSEC_SECY_ATTR_WINDOW, secy->replay_window))
3022 nla_nest_end(skb, secy_nest);
3026 nla_nest_cancel(skb, secy_nest);
3030 static noinline_for_stack int
3031 dump_secy(struct macsec_secy *secy, struct net_device *dev,
3032 struct sk_buff *skb, struct netlink_callback *cb)
3034 struct macsec_tx_sc_stats tx_sc_stats = {0, };
3035 struct macsec_tx_sa_stats tx_sa_stats = {0, };
3036 struct macsec_rx_sc_stats rx_sc_stats = {0, };
3037 struct macsec_rx_sa_stats rx_sa_stats = {0, };
3038 struct macsec_dev *macsec = netdev_priv(dev);
3039 struct macsec_dev_stats dev_stats = {0, };
3040 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
3041 struct nlattr *txsa_list, *rxsc_list;
3042 struct macsec_rx_sc *rx_sc;
3043 struct nlattr *attr;
3047 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
3048 &macsec_fam, NLM_F_MULTI, MACSEC_CMD_GET_TXSC);
3052 genl_dump_check_consistent(cb, hdr);
3054 if (nla_put_u32(skb, MACSEC_ATTR_IFINDEX, dev->ifindex))
3055 goto nla_put_failure;
3057 attr = nla_nest_start_noflag(skb, MACSEC_ATTR_OFFLOAD);
3059 goto nla_put_failure;
3060 if (nla_put_u8(skb, MACSEC_OFFLOAD_ATTR_TYPE, macsec->offload))
3061 goto nla_put_failure;
3062 nla_nest_end(skb, attr);
3064 if (nla_put_secy(secy, skb))
3065 goto nla_put_failure;
3067 attr = nla_nest_start_noflag(skb, MACSEC_ATTR_TXSC_STATS);
3069 goto nla_put_failure;
3071 get_tx_sc_stats(dev, &tx_sc_stats);
3072 if (copy_tx_sc_stats(skb, &tx_sc_stats)) {
3073 nla_nest_cancel(skb, attr);
3074 goto nla_put_failure;
3076 nla_nest_end(skb, attr);
3078 attr = nla_nest_start_noflag(skb, MACSEC_ATTR_SECY_STATS);
3080 goto nla_put_failure;
3081 get_secy_stats(dev, &dev_stats);
3082 if (copy_secy_stats(skb, &dev_stats)) {
3083 nla_nest_cancel(skb, attr);
3084 goto nla_put_failure;
3086 nla_nest_end(skb, attr);
3088 txsa_list = nla_nest_start_noflag(skb, MACSEC_ATTR_TXSA_LIST);
3090 goto nla_put_failure;
3091 for (i = 0, j = 1; i < MACSEC_NUM_AN; i++) {
3092 struct macsec_tx_sa *tx_sa = rtnl_dereference(tx_sc->sa[i]);
3093 struct nlattr *txsa_nest;
3100 txsa_nest = nla_nest_start_noflag(skb, j++);
3102 nla_nest_cancel(skb, txsa_list);
3103 goto nla_put_failure;
3106 attr = nla_nest_start_noflag(skb, MACSEC_SA_ATTR_STATS);
3108 nla_nest_cancel(skb, txsa_nest);
3109 nla_nest_cancel(skb, txsa_list);
3110 goto nla_put_failure;
3112 memset(&tx_sa_stats, 0, sizeof(tx_sa_stats));
3113 get_tx_sa_stats(dev, i, tx_sa, &tx_sa_stats);
3114 if (copy_tx_sa_stats(skb, &tx_sa_stats)) {
3115 nla_nest_cancel(skb, attr);
3116 nla_nest_cancel(skb, txsa_nest);
3117 nla_nest_cancel(skb, txsa_list);
3118 goto nla_put_failure;
3120 nla_nest_end(skb, attr);
3123 pn = tx_sa->next_pn;
3124 pn_len = MACSEC_XPN_PN_LEN;
3126 pn = tx_sa->next_pn_halves.lower;
3127 pn_len = MACSEC_DEFAULT_PN_LEN;
3130 if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) ||
3131 nla_put(skb, MACSEC_SA_ATTR_PN, pn_len, &pn) ||
3132 nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, tx_sa->key.id) ||
3133 (secy->xpn && nla_put_ssci(skb, MACSEC_SA_ATTR_SSCI, tx_sa->ssci)) ||
3134 nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, tx_sa->active)) {
3135 nla_nest_cancel(skb, txsa_nest);
3136 nla_nest_cancel(skb, txsa_list);
3137 goto nla_put_failure;
3140 nla_nest_end(skb, txsa_nest);
3142 nla_nest_end(skb, txsa_list);
3144 rxsc_list = nla_nest_start_noflag(skb, MACSEC_ATTR_RXSC_LIST);
3146 goto nla_put_failure;
3149 for_each_rxsc_rtnl(secy, rx_sc) {
3151 struct nlattr *rxsa_list;
3152 struct nlattr *rxsc_nest = nla_nest_start_noflag(skb, j++);
3155 nla_nest_cancel(skb, rxsc_list);
3156 goto nla_put_failure;
3159 if (nla_put_u8(skb, MACSEC_RXSC_ATTR_ACTIVE, rx_sc->active) ||
3160 nla_put_sci(skb, MACSEC_RXSC_ATTR_SCI, rx_sc->sci,
3161 MACSEC_RXSC_ATTR_PAD)) {
3162 nla_nest_cancel(skb, rxsc_nest);
3163 nla_nest_cancel(skb, rxsc_list);
3164 goto nla_put_failure;
3167 attr = nla_nest_start_noflag(skb, MACSEC_RXSC_ATTR_STATS);
3169 nla_nest_cancel(skb, rxsc_nest);
3170 nla_nest_cancel(skb, rxsc_list);
3171 goto nla_put_failure;
3173 memset(&rx_sc_stats, 0, sizeof(rx_sc_stats));
3174 get_rx_sc_stats(dev, rx_sc, &rx_sc_stats);
3175 if (copy_rx_sc_stats(skb, &rx_sc_stats)) {
3176 nla_nest_cancel(skb, attr);
3177 nla_nest_cancel(skb, rxsc_nest);
3178 nla_nest_cancel(skb, rxsc_list);
3179 goto nla_put_failure;
3181 nla_nest_end(skb, attr);
3183 rxsa_list = nla_nest_start_noflag(skb,
3184 MACSEC_RXSC_ATTR_SA_LIST);
3186 nla_nest_cancel(skb, rxsc_nest);
3187 nla_nest_cancel(skb, rxsc_list);
3188 goto nla_put_failure;
3191 for (i = 0, k = 1; i < MACSEC_NUM_AN; i++) {
3192 struct macsec_rx_sa *rx_sa = rtnl_dereference(rx_sc->sa[i]);
3193 struct nlattr *rxsa_nest;
3200 rxsa_nest = nla_nest_start_noflag(skb, k++);
3202 nla_nest_cancel(skb, rxsa_list);
3203 nla_nest_cancel(skb, rxsc_nest);
3204 nla_nest_cancel(skb, rxsc_list);
3205 goto nla_put_failure;
3208 attr = nla_nest_start_noflag(skb,
3209 MACSEC_SA_ATTR_STATS);
3211 nla_nest_cancel(skb, rxsa_list);
3212 nla_nest_cancel(skb, rxsc_nest);
3213 nla_nest_cancel(skb, rxsc_list);
3214 goto nla_put_failure;
3216 memset(&rx_sa_stats, 0, sizeof(rx_sa_stats));
3217 get_rx_sa_stats(dev, rx_sc, i, rx_sa, &rx_sa_stats);
3218 if (copy_rx_sa_stats(skb, &rx_sa_stats)) {
3219 nla_nest_cancel(skb, attr);
3220 nla_nest_cancel(skb, rxsa_list);
3221 nla_nest_cancel(skb, rxsc_nest);
3222 nla_nest_cancel(skb, rxsc_list);
3223 goto nla_put_failure;
3225 nla_nest_end(skb, attr);
3228 pn = rx_sa->next_pn;
3229 pn_len = MACSEC_XPN_PN_LEN;
3231 pn = rx_sa->next_pn_halves.lower;
3232 pn_len = MACSEC_DEFAULT_PN_LEN;
3235 if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) ||
3236 nla_put(skb, MACSEC_SA_ATTR_PN, pn_len, &pn) ||
3237 nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, rx_sa->key.id) ||
3238 (secy->xpn && nla_put_ssci(skb, MACSEC_SA_ATTR_SSCI, rx_sa->ssci)) ||
3239 nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, rx_sa->active)) {
3240 nla_nest_cancel(skb, rxsa_nest);
3241 nla_nest_cancel(skb, rxsc_nest);
3242 nla_nest_cancel(skb, rxsc_list);
3243 goto nla_put_failure;
3245 nla_nest_end(skb, rxsa_nest);
3248 nla_nest_end(skb, rxsa_list);
3249 nla_nest_end(skb, rxsc_nest);
3252 nla_nest_end(skb, rxsc_list);
3254 genlmsg_end(skb, hdr);
3259 genlmsg_cancel(skb, hdr);
3263 static int macsec_generation = 1; /* protected by RTNL */
3265 static int macsec_dump_txsc(struct sk_buff *skb, struct netlink_callback *cb)
3267 struct net *net = sock_net(skb->sk);
3268 struct net_device *dev;
3271 dev_idx = cb->args[0];
3276 cb->seq = macsec_generation;
3278 for_each_netdev(net, dev) {
3279 struct macsec_secy *secy;
3284 if (!netif_is_macsec(dev))
3287 secy = &macsec_priv(dev)->secy;
3288 if (dump_secy(secy, dev, skb, cb) < 0)
3300 static const struct genl_small_ops macsec_genl_ops[] = {
3302 .cmd = MACSEC_CMD_GET_TXSC,
3303 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3304 .dumpit = macsec_dump_txsc,
3307 .cmd = MACSEC_CMD_ADD_RXSC,
3308 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3309 .doit = macsec_add_rxsc,
3310 .flags = GENL_ADMIN_PERM,
3313 .cmd = MACSEC_CMD_DEL_RXSC,
3314 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3315 .doit = macsec_del_rxsc,
3316 .flags = GENL_ADMIN_PERM,
3319 .cmd = MACSEC_CMD_UPD_RXSC,
3320 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3321 .doit = macsec_upd_rxsc,
3322 .flags = GENL_ADMIN_PERM,
3325 .cmd = MACSEC_CMD_ADD_TXSA,
3326 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3327 .doit = macsec_add_txsa,
3328 .flags = GENL_ADMIN_PERM,
3331 .cmd = MACSEC_CMD_DEL_TXSA,
3332 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3333 .doit = macsec_del_txsa,
3334 .flags = GENL_ADMIN_PERM,
3337 .cmd = MACSEC_CMD_UPD_TXSA,
3338 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3339 .doit = macsec_upd_txsa,
3340 .flags = GENL_ADMIN_PERM,
3343 .cmd = MACSEC_CMD_ADD_RXSA,
3344 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3345 .doit = macsec_add_rxsa,
3346 .flags = GENL_ADMIN_PERM,
3349 .cmd = MACSEC_CMD_DEL_RXSA,
3350 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3351 .doit = macsec_del_rxsa,
3352 .flags = GENL_ADMIN_PERM,
3355 .cmd = MACSEC_CMD_UPD_RXSA,
3356 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3357 .doit = macsec_upd_rxsa,
3358 .flags = GENL_ADMIN_PERM,
3361 .cmd = MACSEC_CMD_UPD_OFFLOAD,
3362 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3363 .doit = macsec_upd_offload,
3364 .flags = GENL_ADMIN_PERM,
3368 static struct genl_family macsec_fam __ro_after_init = {
3369 .name = MACSEC_GENL_NAME,
3371 .version = MACSEC_GENL_VERSION,
3372 .maxattr = MACSEC_ATTR_MAX,
3373 .policy = macsec_genl_policy,
3375 .module = THIS_MODULE,
3376 .small_ops = macsec_genl_ops,
3377 .n_small_ops = ARRAY_SIZE(macsec_genl_ops),
3378 .resv_start_op = MACSEC_CMD_UPD_OFFLOAD + 1,
3381 static netdev_tx_t macsec_start_xmit(struct sk_buff *skb,
3382 struct net_device *dev)
3384 struct macsec_dev *macsec = netdev_priv(dev);
3385 struct macsec_secy *secy = &macsec->secy;
3386 struct pcpu_secy_stats *secy_stats;
3389 if (macsec_is_offloaded(netdev_priv(dev))) {
3390 struct metadata_dst *md_dst = secy->tx_sc.md_dst;
3393 dst_hold(&md_dst->dst);
3394 skb_dst_set(skb, &md_dst->dst);
3395 skb->dev = macsec->real_dev;
3396 return dev_queue_xmit(skb);
3400 if (!secy->protect_frames) {
3401 secy_stats = this_cpu_ptr(macsec->stats);
3402 u64_stats_update_begin(&secy_stats->syncp);
3403 secy_stats->stats.OutPktsUntagged++;
3404 u64_stats_update_end(&secy_stats->syncp);
3405 skb->dev = macsec->real_dev;
3407 ret = dev_queue_xmit(skb);
3408 count_tx(dev, ret, len);
3412 if (!secy->operational) {
3414 DEV_STATS_INC(dev, tx_dropped);
3415 return NETDEV_TX_OK;
3419 skb = macsec_encrypt(skb, dev);
3421 if (PTR_ERR(skb) != -EINPROGRESS)
3422 DEV_STATS_INC(dev, tx_dropped);
3423 return NETDEV_TX_OK;
3426 macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa);
3428 macsec_encrypt_finish(skb, dev);
3429 ret = dev_queue_xmit(skb);
3430 count_tx(dev, ret, len);
3434 #define MACSEC_FEATURES \
3435 (NETIF_F_SG | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST)
3437 static int macsec_dev_init(struct net_device *dev)
3439 struct macsec_dev *macsec = macsec_priv(dev);
3440 struct net_device *real_dev = macsec->real_dev;
3443 dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
3447 err = gro_cells_init(&macsec->gro_cells, dev);
3449 free_percpu(dev->tstats);
3453 dev->features = real_dev->features & MACSEC_FEATURES;
3454 dev->features |= NETIF_F_LLTX | NETIF_F_GSO_SOFTWARE;
3456 dev->needed_headroom = real_dev->needed_headroom +
3457 MACSEC_NEEDED_HEADROOM;
3458 dev->needed_tailroom = real_dev->needed_tailroom +
3459 MACSEC_NEEDED_TAILROOM;
3461 if (is_zero_ether_addr(dev->dev_addr))
3462 eth_hw_addr_inherit(dev, real_dev);
3463 if (is_zero_ether_addr(dev->broadcast))
3464 memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len);
3466 /* Get macsec's reference to real_dev */
3467 netdev_hold(real_dev, &macsec->dev_tracker, GFP_KERNEL);
3472 static void macsec_dev_uninit(struct net_device *dev)
3474 struct macsec_dev *macsec = macsec_priv(dev);
3476 gro_cells_destroy(&macsec->gro_cells);
3477 free_percpu(dev->tstats);
3480 static netdev_features_t macsec_fix_features(struct net_device *dev,
3481 netdev_features_t features)
3483 struct macsec_dev *macsec = macsec_priv(dev);
3484 struct net_device *real_dev = macsec->real_dev;
3486 features &= (real_dev->features & MACSEC_FEATURES) |
3487 NETIF_F_GSO_SOFTWARE | NETIF_F_SOFT_FEATURES;
3488 features |= NETIF_F_LLTX;
3493 static int macsec_dev_open(struct net_device *dev)
3495 struct macsec_dev *macsec = macsec_priv(dev);
3496 struct net_device *real_dev = macsec->real_dev;
3499 err = dev_uc_add(real_dev, dev->dev_addr);
3503 if (dev->flags & IFF_ALLMULTI) {
3504 err = dev_set_allmulti(real_dev, 1);
3509 if (dev->flags & IFF_PROMISC) {
3510 err = dev_set_promiscuity(real_dev, 1);
3512 goto clear_allmulti;
3515 /* If h/w offloading is available, propagate to the device */
3516 if (macsec_is_offloaded(macsec)) {
3517 const struct macsec_ops *ops;
3518 struct macsec_context ctx;
3520 ops = macsec_get_ops(netdev_priv(dev), &ctx);
3523 goto clear_allmulti;
3526 ctx.secy = &macsec->secy;
3527 err = macsec_offload(ops->mdo_dev_open, &ctx);
3529 goto clear_allmulti;
3532 if (netif_carrier_ok(real_dev))
3533 netif_carrier_on(dev);
3537 if (dev->flags & IFF_ALLMULTI)
3538 dev_set_allmulti(real_dev, -1);
3540 dev_uc_del(real_dev, dev->dev_addr);
3541 netif_carrier_off(dev);
3545 static int macsec_dev_stop(struct net_device *dev)
3547 struct macsec_dev *macsec = macsec_priv(dev);
3548 struct net_device *real_dev = macsec->real_dev;
3550 netif_carrier_off(dev);
3552 /* If h/w offloading is available, propagate to the device */
3553 if (macsec_is_offloaded(macsec)) {
3554 const struct macsec_ops *ops;
3555 struct macsec_context ctx;
3557 ops = macsec_get_ops(macsec, &ctx);
3559 ctx.secy = &macsec->secy;
3560 macsec_offload(ops->mdo_dev_stop, &ctx);
3564 dev_mc_unsync(real_dev, dev);
3565 dev_uc_unsync(real_dev, dev);
3567 if (dev->flags & IFF_ALLMULTI)
3568 dev_set_allmulti(real_dev, -1);
3570 if (dev->flags & IFF_PROMISC)
3571 dev_set_promiscuity(real_dev, -1);
3573 dev_uc_del(real_dev, dev->dev_addr);
3578 static void macsec_dev_change_rx_flags(struct net_device *dev, int change)
3580 struct net_device *real_dev = macsec_priv(dev)->real_dev;
3582 if (!(dev->flags & IFF_UP))
3585 if (change & IFF_ALLMULTI)
3586 dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1);
3588 if (change & IFF_PROMISC)
3589 dev_set_promiscuity(real_dev,
3590 dev->flags & IFF_PROMISC ? 1 : -1);
3593 static void macsec_dev_set_rx_mode(struct net_device *dev)
3595 struct net_device *real_dev = macsec_priv(dev)->real_dev;
3597 dev_mc_sync(real_dev, dev);
3598 dev_uc_sync(real_dev, dev);
3601 static int macsec_set_mac_address(struct net_device *dev, void *p)
3603 struct macsec_dev *macsec = macsec_priv(dev);
3604 struct net_device *real_dev = macsec->real_dev;
3605 struct sockaddr *addr = p;
3608 if (!is_valid_ether_addr(addr->sa_data))
3609 return -EADDRNOTAVAIL;
3611 if (!(dev->flags & IFF_UP))
3614 err = dev_uc_add(real_dev, addr->sa_data);
3618 dev_uc_del(real_dev, dev->dev_addr);
3621 eth_hw_addr_set(dev, addr->sa_data);
3623 /* If h/w offloading is available, propagate to the device */
3624 if (macsec_is_offloaded(macsec)) {
3625 const struct macsec_ops *ops;
3626 struct macsec_context ctx;
3628 ops = macsec_get_ops(macsec, &ctx);
3630 ctx.secy = &macsec->secy;
3631 macsec_offload(ops->mdo_upd_secy, &ctx);
3638 static int macsec_change_mtu(struct net_device *dev, int new_mtu)
3640 struct macsec_dev *macsec = macsec_priv(dev);
3641 unsigned int extra = macsec->secy.icv_len + macsec_extra_len(true);
3643 if (macsec->real_dev->mtu - extra < new_mtu)
3651 static void macsec_get_stats64(struct net_device *dev,
3652 struct rtnl_link_stats64 *s)
3657 dev_fetch_sw_netstats(s, dev->tstats);
3659 s->rx_dropped = atomic_long_read(&dev->stats.__rx_dropped);
3660 s->tx_dropped = atomic_long_read(&dev->stats.__tx_dropped);
3661 s->rx_errors = atomic_long_read(&dev->stats.__rx_errors);
3664 static int macsec_get_iflink(const struct net_device *dev)
3666 return macsec_priv(dev)->real_dev->ifindex;
3669 static const struct net_device_ops macsec_netdev_ops = {
3670 .ndo_init = macsec_dev_init,
3671 .ndo_uninit = macsec_dev_uninit,
3672 .ndo_open = macsec_dev_open,
3673 .ndo_stop = macsec_dev_stop,
3674 .ndo_fix_features = macsec_fix_features,
3675 .ndo_change_mtu = macsec_change_mtu,
3676 .ndo_set_rx_mode = macsec_dev_set_rx_mode,
3677 .ndo_change_rx_flags = macsec_dev_change_rx_flags,
3678 .ndo_set_mac_address = macsec_set_mac_address,
3679 .ndo_start_xmit = macsec_start_xmit,
3680 .ndo_get_stats64 = macsec_get_stats64,
3681 .ndo_get_iflink = macsec_get_iflink,
3684 static const struct device_type macsec_type = {
3688 static const struct nla_policy macsec_rtnl_policy[IFLA_MACSEC_MAX + 1] = {
3689 [IFLA_MACSEC_SCI] = { .type = NLA_U64 },
3690 [IFLA_MACSEC_PORT] = { .type = NLA_U16 },
3691 [IFLA_MACSEC_ICV_LEN] = { .type = NLA_U8 },
3692 [IFLA_MACSEC_CIPHER_SUITE] = { .type = NLA_U64 },
3693 [IFLA_MACSEC_WINDOW] = { .type = NLA_U32 },
3694 [IFLA_MACSEC_ENCODING_SA] = { .type = NLA_U8 },
3695 [IFLA_MACSEC_ENCRYPT] = { .type = NLA_U8 },
3696 [IFLA_MACSEC_PROTECT] = { .type = NLA_U8 },
3697 [IFLA_MACSEC_INC_SCI] = { .type = NLA_U8 },
3698 [IFLA_MACSEC_ES] = { .type = NLA_U8 },
3699 [IFLA_MACSEC_SCB] = { .type = NLA_U8 },
3700 [IFLA_MACSEC_REPLAY_PROTECT] = { .type = NLA_U8 },
3701 [IFLA_MACSEC_VALIDATION] = { .type = NLA_U8 },
3702 [IFLA_MACSEC_OFFLOAD] = { .type = NLA_U8 },
3705 static void macsec_free_netdev(struct net_device *dev)
3707 struct macsec_dev *macsec = macsec_priv(dev);
3709 if (macsec->secy.tx_sc.md_dst)
3710 metadata_dst_free(macsec->secy.tx_sc.md_dst);
3711 free_percpu(macsec->stats);
3712 free_percpu(macsec->secy.tx_sc.stats);
3714 /* Get rid of the macsec's reference to real_dev */
3715 netdev_put(macsec->real_dev, &macsec->dev_tracker);
3718 static void macsec_setup(struct net_device *dev)
3722 dev->max_mtu = ETH_MAX_MTU;
3723 dev->priv_flags |= IFF_NO_QUEUE;
3724 dev->netdev_ops = &macsec_netdev_ops;
3725 dev->needs_free_netdev = true;
3726 dev->priv_destructor = macsec_free_netdev;
3727 SET_NETDEV_DEVTYPE(dev, &macsec_type);
3729 eth_zero_addr(dev->broadcast);
3732 static int macsec_changelink_common(struct net_device *dev,
3733 struct nlattr *data[])
3735 struct macsec_secy *secy;
3736 struct macsec_tx_sc *tx_sc;
3738 secy = &macsec_priv(dev)->secy;
3739 tx_sc = &secy->tx_sc;
3741 if (data[IFLA_MACSEC_ENCODING_SA]) {
3742 struct macsec_tx_sa *tx_sa;
3744 tx_sc->encoding_sa = nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]);
3745 tx_sa = rtnl_dereference(tx_sc->sa[tx_sc->encoding_sa]);
3747 secy->operational = tx_sa && tx_sa->active;
3750 if (data[IFLA_MACSEC_ENCRYPT])
3751 tx_sc->encrypt = !!nla_get_u8(data[IFLA_MACSEC_ENCRYPT]);
3753 if (data[IFLA_MACSEC_PROTECT])
3754 secy->protect_frames = !!nla_get_u8(data[IFLA_MACSEC_PROTECT]);
3756 if (data[IFLA_MACSEC_INC_SCI])
3757 tx_sc->send_sci = !!nla_get_u8(data[IFLA_MACSEC_INC_SCI]);
3759 if (data[IFLA_MACSEC_ES])
3760 tx_sc->end_station = !!nla_get_u8(data[IFLA_MACSEC_ES]);
3762 if (data[IFLA_MACSEC_SCB])
3763 tx_sc->scb = !!nla_get_u8(data[IFLA_MACSEC_SCB]);
3765 if (data[IFLA_MACSEC_REPLAY_PROTECT])
3766 secy->replay_protect = !!nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT]);
3768 if (data[IFLA_MACSEC_VALIDATION])
3769 secy->validate_frames = nla_get_u8(data[IFLA_MACSEC_VALIDATION]);
3771 if (data[IFLA_MACSEC_CIPHER_SUITE]) {
3772 switch (nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE])) {
3773 case MACSEC_CIPHER_ID_GCM_AES_128:
3774 case MACSEC_DEFAULT_CIPHER_ID:
3775 secy->key_len = MACSEC_GCM_AES_128_SAK_LEN;
3778 case MACSEC_CIPHER_ID_GCM_AES_256:
3779 secy->key_len = MACSEC_GCM_AES_256_SAK_LEN;
3782 case MACSEC_CIPHER_ID_GCM_AES_XPN_128:
3783 secy->key_len = MACSEC_GCM_AES_128_SAK_LEN;
3786 case MACSEC_CIPHER_ID_GCM_AES_XPN_256:
3787 secy->key_len = MACSEC_GCM_AES_256_SAK_LEN;
3795 if (data[IFLA_MACSEC_WINDOW]) {
3796 secy->replay_window = nla_get_u32(data[IFLA_MACSEC_WINDOW]);
3798 /* IEEE 802.1AEbw-2013 10.7.8 - maximum replay window
3799 * for XPN cipher suites */
3801 secy->replay_window > MACSEC_XPN_MAX_REPLAY_WINDOW)
3808 static int macsec_changelink(struct net_device *dev, struct nlattr *tb[],
3809 struct nlattr *data[],
3810 struct netlink_ext_ack *extack)
3812 struct macsec_dev *macsec = macsec_priv(dev);
3813 bool macsec_offload_state_change = false;
3814 enum macsec_offload offload;
3815 struct macsec_tx_sc tx_sc;
3816 struct macsec_secy secy;
3822 if (data[IFLA_MACSEC_CIPHER_SUITE] ||
3823 data[IFLA_MACSEC_ICV_LEN] ||
3824 data[IFLA_MACSEC_SCI] ||
3825 data[IFLA_MACSEC_PORT])
3828 /* Keep a copy of unmodified secy and tx_sc, in case the offload
3829 * propagation fails, to revert macsec_changelink_common.
3831 memcpy(&secy, &macsec->secy, sizeof(secy));
3832 memcpy(&tx_sc, &macsec->secy.tx_sc, sizeof(tx_sc));
3834 ret = macsec_changelink_common(dev, data);
3838 if (data[IFLA_MACSEC_OFFLOAD]) {
3839 offload = nla_get_u8(data[IFLA_MACSEC_OFFLOAD]);
3840 if (macsec->offload != offload) {
3841 macsec_offload_state_change = true;
3842 ret = macsec_update_offload(dev, offload);
3848 /* If h/w offloading is available, propagate to the device */
3849 if (!macsec_offload_state_change && macsec_is_offloaded(macsec)) {
3850 const struct macsec_ops *ops;
3851 struct macsec_context ctx;
3853 ops = macsec_get_ops(netdev_priv(dev), &ctx);
3859 ctx.secy = &macsec->secy;
3860 ret = macsec_offload(ops->mdo_upd_secy, &ctx);
3868 memcpy(&macsec->secy.tx_sc, &tx_sc, sizeof(tx_sc));
3869 memcpy(&macsec->secy, &secy, sizeof(secy));
3874 static void macsec_del_dev(struct macsec_dev *macsec)
3878 while (macsec->secy.rx_sc) {
3879 struct macsec_rx_sc *rx_sc = rtnl_dereference(macsec->secy.rx_sc);
3881 rcu_assign_pointer(macsec->secy.rx_sc, rx_sc->next);
3885 for (i = 0; i < MACSEC_NUM_AN; i++) {
3886 struct macsec_tx_sa *sa = rtnl_dereference(macsec->secy.tx_sc.sa[i]);
3889 RCU_INIT_POINTER(macsec->secy.tx_sc.sa[i], NULL);
3895 static void macsec_common_dellink(struct net_device *dev, struct list_head *head)
3897 struct macsec_dev *macsec = macsec_priv(dev);
3898 struct net_device *real_dev = macsec->real_dev;
3900 /* If h/w offloading is available, propagate to the device */
3901 if (macsec_is_offloaded(macsec)) {
3902 const struct macsec_ops *ops;
3903 struct macsec_context ctx;
3905 ops = macsec_get_ops(netdev_priv(dev), &ctx);
3907 ctx.secy = &macsec->secy;
3908 macsec_offload(ops->mdo_del_secy, &ctx);
3912 unregister_netdevice_queue(dev, head);
3913 list_del_rcu(&macsec->secys);
3914 macsec_del_dev(macsec);
3915 netdev_upper_dev_unlink(real_dev, dev);
3917 macsec_generation++;
3920 static void macsec_dellink(struct net_device *dev, struct list_head *head)
3922 struct macsec_dev *macsec = macsec_priv(dev);
3923 struct net_device *real_dev = macsec->real_dev;
3924 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
3926 macsec_common_dellink(dev, head);
3928 if (list_empty(&rxd->secys)) {
3929 netdev_rx_handler_unregister(real_dev);
3934 static int register_macsec_dev(struct net_device *real_dev,
3935 struct net_device *dev)
3937 struct macsec_dev *macsec = macsec_priv(dev);
3938 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
3943 rxd = kmalloc(sizeof(*rxd), GFP_KERNEL);
3947 INIT_LIST_HEAD(&rxd->secys);
3949 err = netdev_rx_handler_register(real_dev, macsec_handle_frame,
3957 list_add_tail_rcu(&macsec->secys, &rxd->secys);
3961 static bool sci_exists(struct net_device *dev, sci_t sci)
3963 struct macsec_rxh_data *rxd = macsec_data_rtnl(dev);
3964 struct macsec_dev *macsec;
3966 list_for_each_entry(macsec, &rxd->secys, secys) {
3967 if (macsec->secy.sci == sci)
3974 static sci_t dev_to_sci(struct net_device *dev, __be16 port)
3976 return make_sci(dev->dev_addr, port);
3979 static int macsec_add_dev(struct net_device *dev, sci_t sci, u8 icv_len)
3981 struct macsec_dev *macsec = macsec_priv(dev);
3982 struct macsec_secy *secy = &macsec->secy;
3984 macsec->stats = netdev_alloc_pcpu_stats(struct pcpu_secy_stats);
3988 secy->tx_sc.stats = netdev_alloc_pcpu_stats(struct pcpu_tx_sc_stats);
3989 if (!secy->tx_sc.stats)
3992 secy->tx_sc.md_dst = metadata_dst_alloc(0, METADATA_MACSEC, GFP_KERNEL);
3993 if (!secy->tx_sc.md_dst)
3994 /* macsec and secy percpu stats will be freed when unregistering
3995 * net_device in macsec_free_netdev()
3999 if (sci == MACSEC_UNDEF_SCI)
4000 sci = dev_to_sci(dev, MACSEC_PORT_ES);
4003 secy->operational = true;
4004 secy->key_len = DEFAULT_SAK_LEN;
4005 secy->icv_len = icv_len;
4006 secy->validate_frames = MACSEC_VALIDATE_DEFAULT;
4007 secy->protect_frames = true;
4008 secy->replay_protect = false;
4009 secy->xpn = DEFAULT_XPN;
4012 secy->tx_sc.md_dst->u.macsec_info.sci = sci;
4013 secy->tx_sc.active = true;
4014 secy->tx_sc.encoding_sa = DEFAULT_ENCODING_SA;
4015 secy->tx_sc.encrypt = DEFAULT_ENCRYPT;
4016 secy->tx_sc.send_sci = DEFAULT_SEND_SCI;
4017 secy->tx_sc.end_station = false;
4018 secy->tx_sc.scb = false;
4023 static struct lock_class_key macsec_netdev_addr_lock_key;
4025 static int macsec_newlink(struct net *net, struct net_device *dev,
4026 struct nlattr *tb[], struct nlattr *data[],
4027 struct netlink_ext_ack *extack)
4029 struct macsec_dev *macsec = macsec_priv(dev);
4030 rx_handler_func_t *rx_handler;
4031 u8 icv_len = MACSEC_DEFAULT_ICV_LEN;
4032 struct net_device *real_dev;
4038 real_dev = __dev_get_by_index(net, nla_get_u32(tb[IFLA_LINK]));
4041 if (real_dev->type != ARPHRD_ETHER)
4044 dev->priv_flags |= IFF_MACSEC;
4046 macsec->real_dev = real_dev;
4048 if (data && data[IFLA_MACSEC_OFFLOAD])
4049 macsec->offload = nla_get_offload(data[IFLA_MACSEC_OFFLOAD]);
4051 /* MACsec offloading is off by default */
4052 macsec->offload = MACSEC_OFFLOAD_OFF;
4054 /* Check if the offloading mode is supported by the underlying layers */
4055 if (macsec->offload != MACSEC_OFFLOAD_OFF &&
4056 !macsec_check_offload(macsec->offload, macsec))
4059 /* send_sci must be set to true when transmit sci explicitly is set */
4060 if ((data && data[IFLA_MACSEC_SCI]) &&
4061 (data && data[IFLA_MACSEC_INC_SCI])) {
4062 u8 send_sci = !!nla_get_u8(data[IFLA_MACSEC_INC_SCI]);
4068 if (data && data[IFLA_MACSEC_ICV_LEN])
4069 icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]);
4070 mtu = real_dev->mtu - icv_len - macsec_extra_len(true);
4076 rx_handler = rtnl_dereference(real_dev->rx_handler);
4077 if (rx_handler && rx_handler != macsec_handle_frame)
4080 err = register_netdevice(dev);
4084 netdev_lockdep_set_classes(dev);
4085 lockdep_set_class(&dev->addr_list_lock,
4086 &macsec_netdev_addr_lock_key);
4088 err = netdev_upper_dev_link(real_dev, dev, extack);
4092 /* need to be already registered so that ->init has run and
4093 * the MAC addr is set
4095 if (data && data[IFLA_MACSEC_SCI])
4096 sci = nla_get_sci(data[IFLA_MACSEC_SCI]);
4097 else if (data && data[IFLA_MACSEC_PORT])
4098 sci = dev_to_sci(dev, nla_get_be16(data[IFLA_MACSEC_PORT]));
4100 sci = dev_to_sci(dev, MACSEC_PORT_ES);
4102 if (rx_handler && sci_exists(real_dev, sci)) {
4107 err = macsec_add_dev(dev, sci, icv_len);
4112 err = macsec_changelink_common(dev, data);
4117 /* If h/w offloading is available, propagate to the device */
4118 if (macsec_is_offloaded(macsec)) {
4119 const struct macsec_ops *ops;
4120 struct macsec_context ctx;
4122 ops = macsec_get_ops(macsec, &ctx);
4124 ctx.secy = &macsec->secy;
4125 err = macsec_offload(ops->mdo_add_secy, &ctx);
4131 err = register_macsec_dev(real_dev, dev);
4135 netif_stacked_transfer_operstate(real_dev, dev);
4136 linkwatch_fire_event(dev);
4138 macsec_generation++;
4143 macsec_del_dev(macsec);
4145 netdev_upper_dev_unlink(real_dev, dev);
4147 unregister_netdevice(dev);
4151 static int macsec_validate_attr(struct nlattr *tb[], struct nlattr *data[],
4152 struct netlink_ext_ack *extack)
4154 u64 csid = MACSEC_DEFAULT_CIPHER_ID;
4155 u8 icv_len = MACSEC_DEFAULT_ICV_LEN;
4162 if (data[IFLA_MACSEC_CIPHER_SUITE])
4163 csid = nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE]);
4165 if (data[IFLA_MACSEC_ICV_LEN]) {
4166 icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]);
4167 if (icv_len != MACSEC_DEFAULT_ICV_LEN) {
4168 char dummy_key[DEFAULT_SAK_LEN] = { 0 };
4169 struct crypto_aead *dummy_tfm;
4171 dummy_tfm = macsec_alloc_tfm(dummy_key,
4174 if (IS_ERR(dummy_tfm))
4175 return PTR_ERR(dummy_tfm);
4176 crypto_free_aead(dummy_tfm);
4181 case MACSEC_CIPHER_ID_GCM_AES_128:
4182 case MACSEC_CIPHER_ID_GCM_AES_256:
4183 case MACSEC_CIPHER_ID_GCM_AES_XPN_128:
4184 case MACSEC_CIPHER_ID_GCM_AES_XPN_256:
4185 case MACSEC_DEFAULT_CIPHER_ID:
4186 if (icv_len < MACSEC_MIN_ICV_LEN ||
4187 icv_len > MACSEC_STD_ICV_LEN)
4194 if (data[IFLA_MACSEC_ENCODING_SA]) {
4195 if (nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]) >= MACSEC_NUM_AN)
4199 for (flag = IFLA_MACSEC_ENCODING_SA + 1;
4200 flag < IFLA_MACSEC_VALIDATION;
4203 if (nla_get_u8(data[flag]) > 1)
4208 es = data[IFLA_MACSEC_ES] ? nla_get_u8(data[IFLA_MACSEC_ES]) : false;
4209 sci = data[IFLA_MACSEC_INC_SCI] ? nla_get_u8(data[IFLA_MACSEC_INC_SCI]) : false;
4210 scb = data[IFLA_MACSEC_SCB] ? nla_get_u8(data[IFLA_MACSEC_SCB]) : false;
4212 if ((sci && (scb || es)) || (scb && es))
4215 if (data[IFLA_MACSEC_VALIDATION] &&
4216 nla_get_u8(data[IFLA_MACSEC_VALIDATION]) > MACSEC_VALIDATE_MAX)
4219 if ((data[IFLA_MACSEC_REPLAY_PROTECT] &&
4220 nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT])) &&
4221 !data[IFLA_MACSEC_WINDOW])
4227 static struct net *macsec_get_link_net(const struct net_device *dev)
4229 return dev_net(macsec_priv(dev)->real_dev);
4232 struct net_device *macsec_get_real_dev(const struct net_device *dev)
4234 return macsec_priv(dev)->real_dev;
4236 EXPORT_SYMBOL_GPL(macsec_get_real_dev);
4238 bool macsec_netdev_is_offloaded(struct net_device *dev)
4240 return macsec_is_offloaded(macsec_priv(dev));
4242 EXPORT_SYMBOL_GPL(macsec_netdev_is_offloaded);
4244 static size_t macsec_get_size(const struct net_device *dev)
4246 return nla_total_size_64bit(8) + /* IFLA_MACSEC_SCI */
4247 nla_total_size(1) + /* IFLA_MACSEC_ICV_LEN */
4248 nla_total_size_64bit(8) + /* IFLA_MACSEC_CIPHER_SUITE */
4249 nla_total_size(4) + /* IFLA_MACSEC_WINDOW */
4250 nla_total_size(1) + /* IFLA_MACSEC_ENCODING_SA */
4251 nla_total_size(1) + /* IFLA_MACSEC_ENCRYPT */
4252 nla_total_size(1) + /* IFLA_MACSEC_PROTECT */
4253 nla_total_size(1) + /* IFLA_MACSEC_INC_SCI */
4254 nla_total_size(1) + /* IFLA_MACSEC_ES */
4255 nla_total_size(1) + /* IFLA_MACSEC_SCB */
4256 nla_total_size(1) + /* IFLA_MACSEC_REPLAY_PROTECT */
4257 nla_total_size(1) + /* IFLA_MACSEC_VALIDATION */
4258 nla_total_size(1) + /* IFLA_MACSEC_OFFLOAD */
4262 static int macsec_fill_info(struct sk_buff *skb,
4263 const struct net_device *dev)
4265 struct macsec_tx_sc *tx_sc;
4266 struct macsec_dev *macsec;
4267 struct macsec_secy *secy;
4270 macsec = macsec_priv(dev);
4271 secy = &macsec->secy;
4272 tx_sc = &secy->tx_sc;
4274 switch (secy->key_len) {
4275 case MACSEC_GCM_AES_128_SAK_LEN:
4276 csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_128 : MACSEC_DEFAULT_CIPHER_ID;
4278 case MACSEC_GCM_AES_256_SAK_LEN:
4279 csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_256 : MACSEC_CIPHER_ID_GCM_AES_256;
4282 goto nla_put_failure;
4285 if (nla_put_sci(skb, IFLA_MACSEC_SCI, secy->sci,
4287 nla_put_u8(skb, IFLA_MACSEC_ICV_LEN, secy->icv_len) ||
4288 nla_put_u64_64bit(skb, IFLA_MACSEC_CIPHER_SUITE,
4289 csid, IFLA_MACSEC_PAD) ||
4290 nla_put_u8(skb, IFLA_MACSEC_ENCODING_SA, tx_sc->encoding_sa) ||
4291 nla_put_u8(skb, IFLA_MACSEC_ENCRYPT, tx_sc->encrypt) ||
4292 nla_put_u8(skb, IFLA_MACSEC_PROTECT, secy->protect_frames) ||
4293 nla_put_u8(skb, IFLA_MACSEC_INC_SCI, tx_sc->send_sci) ||
4294 nla_put_u8(skb, IFLA_MACSEC_ES, tx_sc->end_station) ||
4295 nla_put_u8(skb, IFLA_MACSEC_SCB, tx_sc->scb) ||
4296 nla_put_u8(skb, IFLA_MACSEC_REPLAY_PROTECT, secy->replay_protect) ||
4297 nla_put_u8(skb, IFLA_MACSEC_VALIDATION, secy->validate_frames) ||
4298 nla_put_u8(skb, IFLA_MACSEC_OFFLOAD, macsec->offload) ||
4300 goto nla_put_failure;
4302 if (secy->replay_protect) {
4303 if (nla_put_u32(skb, IFLA_MACSEC_WINDOW, secy->replay_window))
4304 goto nla_put_failure;
4313 static struct rtnl_link_ops macsec_link_ops __read_mostly = {
4315 .priv_size = sizeof(struct macsec_dev),
4316 .maxtype = IFLA_MACSEC_MAX,
4317 .policy = macsec_rtnl_policy,
4318 .setup = macsec_setup,
4319 .validate = macsec_validate_attr,
4320 .newlink = macsec_newlink,
4321 .changelink = macsec_changelink,
4322 .dellink = macsec_dellink,
4323 .get_size = macsec_get_size,
4324 .fill_info = macsec_fill_info,
4325 .get_link_net = macsec_get_link_net,
4328 static bool is_macsec_master(struct net_device *dev)
4330 return rcu_access_pointer(dev->rx_handler) == macsec_handle_frame;
4333 static int macsec_notify(struct notifier_block *this, unsigned long event,
4336 struct net_device *real_dev = netdev_notifier_info_to_dev(ptr);
4339 if (!is_macsec_master(real_dev))
4345 case NETDEV_CHANGE: {
4346 struct macsec_dev *m, *n;
4347 struct macsec_rxh_data *rxd;
4349 rxd = macsec_data_rtnl(real_dev);
4350 list_for_each_entry_safe(m, n, &rxd->secys, secys) {
4351 struct net_device *dev = m->secy.netdev;
4353 netif_stacked_transfer_operstate(real_dev, dev);
4357 case NETDEV_UNREGISTER: {
4358 struct macsec_dev *m, *n;
4359 struct macsec_rxh_data *rxd;
4361 rxd = macsec_data_rtnl(real_dev);
4362 list_for_each_entry_safe(m, n, &rxd->secys, secys) {
4363 macsec_common_dellink(m->secy.netdev, &head);
4366 netdev_rx_handler_unregister(real_dev);
4369 unregister_netdevice_many(&head);
4372 case NETDEV_CHANGEMTU: {
4373 struct macsec_dev *m;
4374 struct macsec_rxh_data *rxd;
4376 rxd = macsec_data_rtnl(real_dev);
4377 list_for_each_entry(m, &rxd->secys, secys) {
4378 struct net_device *dev = m->secy.netdev;
4379 unsigned int mtu = real_dev->mtu - (m->secy.icv_len +
4380 macsec_extra_len(true));
4383 dev_set_mtu(dev, mtu);
4391 static struct notifier_block macsec_notifier = {
4392 .notifier_call = macsec_notify,
4395 static int __init macsec_init(void)
4399 pr_info("MACsec IEEE 802.1AE\n");
4400 err = register_netdevice_notifier(&macsec_notifier);
4404 err = rtnl_link_register(&macsec_link_ops);
4408 err = genl_register_family(&macsec_fam);
4415 rtnl_link_unregister(&macsec_link_ops);
4417 unregister_netdevice_notifier(&macsec_notifier);
4421 static void __exit macsec_exit(void)
4423 genl_unregister_family(&macsec_fam);
4424 rtnl_link_unregister(&macsec_link_ops);
4425 unregister_netdevice_notifier(&macsec_notifier);
4429 module_init(macsec_init);
4430 module_exit(macsec_exit);
4432 MODULE_ALIAS_RTNL_LINK("macsec");
4433 MODULE_ALIAS_GENL_FAMILY("macsec");
4435 MODULE_DESCRIPTION("MACsec IEEE 802.1AE");
4436 MODULE_LICENSE("GPL v2");