1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * drivers/net/macsec.c - MACsec device
5 * Copyright (c) 2015 Sabrina Dubroca <sd@queasysnail.net>
8 #include <linux/types.h>
9 #include <linux/skbuff.h>
10 #include <linux/socket.h>
11 #include <linux/module.h>
12 #include <crypto/aead.h>
13 #include <linux/etherdevice.h>
14 #include <linux/netdevice.h>
15 #include <linux/rtnetlink.h>
16 #include <linux/refcount.h>
17 #include <net/genetlink.h>
19 #include <net/gro_cells.h>
20 #include <net/macsec.h>
21 #include <net/dst_metadata.h>
22 #include <linux/phy.h>
23 #include <linux/byteorder/generic.h>
24 #include <linux/if_arp.h>
26 #include <uapi/linux/if_macsec.h>
28 /* SecTAG length = macsec_eth_header without the optional SCI */
29 #define MACSEC_TAG_LEN 6
31 struct macsec_eth_header {
35 #if defined(__LITTLE_ENDIAN_BITFIELD)
38 #elif defined(__BIG_ENDIAN_BITFIELD)
42 #error "Please fix <asm/byteorder.h>"
45 u8 secure_channel_id[8]; /* optional */
48 /* minimum secure data length deemed "not short", see IEEE 802.1AE-2006 9.7 */
49 #define MIN_NON_SHORT_LEN 48
51 #define GCM_AES_IV_LEN 12
53 #define for_each_rxsc(secy, sc) \
54 for (sc = rcu_dereference_bh(secy->rx_sc); \
56 sc = rcu_dereference_bh(sc->next))
57 #define for_each_rxsc_rtnl(secy, sc) \
58 for (sc = rtnl_dereference(secy->rx_sc); \
60 sc = rtnl_dereference(sc->next))
62 #define pn_same_half(pn1, pn2) (!(((pn1) >> 31) ^ ((pn2) >> 31)))
66 u8 short_secure_channel_id[4];
74 u8 secure_channel_id[8];
80 #define MACSEC_VALIDATE_DEFAULT MACSEC_VALIDATE_STRICT
82 struct pcpu_secy_stats {
83 struct macsec_dev_stats stats;
84 struct u64_stats_sync syncp;
88 * struct macsec_dev - private data
90 * @real_dev: pointer to underlying netdevice
91 * @dev_tracker: refcount tracker for @real_dev reference
92 * @stats: MACsec device stats
93 * @secys: linked list of SecY's on the underlying device
94 * @gro_cells: pointer to the Generic Receive Offload cell
95 * @offload: status of offloading on the MACsec device
98 struct macsec_secy secy;
99 struct net_device *real_dev;
100 netdevice_tracker dev_tracker;
101 struct pcpu_secy_stats __percpu *stats;
102 struct list_head secys;
103 struct gro_cells gro_cells;
104 enum macsec_offload offload;
108 * struct macsec_rxh_data - rx_handler private argument
109 * @secys: linked list of SecY's on this underlying device
111 struct macsec_rxh_data {
112 struct list_head secys;
115 static struct macsec_dev *macsec_priv(const struct net_device *dev)
117 return (struct macsec_dev *)netdev_priv(dev);
120 static struct macsec_rxh_data *macsec_data_rcu(const struct net_device *dev)
122 return rcu_dereference_bh(dev->rx_handler_data);
125 static struct macsec_rxh_data *macsec_data_rtnl(const struct net_device *dev)
127 return rtnl_dereference(dev->rx_handler_data);
131 struct aead_request *req;
133 struct macsec_tx_sa *tx_sa;
134 struct macsec_rx_sa *rx_sa;
141 static struct macsec_rx_sa *macsec_rxsa_get(struct macsec_rx_sa __rcu *ptr)
143 struct macsec_rx_sa *sa = rcu_dereference_bh(ptr);
145 if (!sa || !sa->active)
148 if (!refcount_inc_not_zero(&sa->refcnt))
154 static struct macsec_rx_sa *macsec_active_rxsa_get(struct macsec_rx_sc *rx_sc)
156 struct macsec_rx_sa *sa = NULL;
159 for (an = 0; an < MACSEC_NUM_AN; an++) {
160 sa = macsec_rxsa_get(rx_sc->sa[an]);
167 static void free_rx_sc_rcu(struct rcu_head *head)
169 struct macsec_rx_sc *rx_sc = container_of(head, struct macsec_rx_sc, rcu_head);
171 free_percpu(rx_sc->stats);
175 static struct macsec_rx_sc *macsec_rxsc_get(struct macsec_rx_sc *sc)
177 return refcount_inc_not_zero(&sc->refcnt) ? sc : NULL;
180 static void macsec_rxsc_put(struct macsec_rx_sc *sc)
182 if (refcount_dec_and_test(&sc->refcnt))
183 call_rcu(&sc->rcu_head, free_rx_sc_rcu);
186 static void free_rxsa(struct rcu_head *head)
188 struct macsec_rx_sa *sa = container_of(head, struct macsec_rx_sa, rcu);
190 crypto_free_aead(sa->key.tfm);
191 free_percpu(sa->stats);
195 static void macsec_rxsa_put(struct macsec_rx_sa *sa)
197 if (refcount_dec_and_test(&sa->refcnt))
198 call_rcu(&sa->rcu, free_rxsa);
201 static struct macsec_tx_sa *macsec_txsa_get(struct macsec_tx_sa __rcu *ptr)
203 struct macsec_tx_sa *sa = rcu_dereference_bh(ptr);
205 if (!sa || !sa->active)
208 if (!refcount_inc_not_zero(&sa->refcnt))
214 static void free_txsa(struct rcu_head *head)
216 struct macsec_tx_sa *sa = container_of(head, struct macsec_tx_sa, rcu);
218 crypto_free_aead(sa->key.tfm);
219 free_percpu(sa->stats);
223 static void macsec_txsa_put(struct macsec_tx_sa *sa)
225 if (refcount_dec_and_test(&sa->refcnt))
226 call_rcu(&sa->rcu, free_txsa);
229 static struct macsec_cb *macsec_skb_cb(struct sk_buff *skb)
231 BUILD_BUG_ON(sizeof(struct macsec_cb) > sizeof(skb->cb));
232 return (struct macsec_cb *)skb->cb;
235 #define MACSEC_PORT_SCB (0x0000)
236 #define MACSEC_UNDEF_SCI ((__force sci_t)0xffffffffffffffffULL)
237 #define MACSEC_UNDEF_SSCI ((__force ssci_t)0xffffffff)
239 #define MACSEC_GCM_AES_128_SAK_LEN 16
240 #define MACSEC_GCM_AES_256_SAK_LEN 32
242 #define DEFAULT_SAK_LEN MACSEC_GCM_AES_128_SAK_LEN
243 #define DEFAULT_XPN false
244 #define DEFAULT_SEND_SCI true
245 #define DEFAULT_ENCRYPT false
246 #define DEFAULT_ENCODING_SA 0
247 #define MACSEC_XPN_MAX_REPLAY_WINDOW (((1 << 30) - 1))
249 static sci_t make_sci(const u8 *addr, __be16 port)
253 memcpy(&sci, addr, ETH_ALEN);
254 memcpy(((char *)&sci) + ETH_ALEN, &port, sizeof(port));
259 static sci_t macsec_frame_sci(struct macsec_eth_header *hdr, bool sci_present)
264 memcpy(&sci, hdr->secure_channel_id,
265 sizeof(hdr->secure_channel_id));
267 sci = make_sci(hdr->eth.h_source, MACSEC_PORT_ES);
272 static unsigned int macsec_sectag_len(bool sci_present)
274 return MACSEC_TAG_LEN + (sci_present ? MACSEC_SCI_LEN : 0);
277 static unsigned int macsec_hdr_len(bool sci_present)
279 return macsec_sectag_len(sci_present) + ETH_HLEN;
282 static unsigned int macsec_extra_len(bool sci_present)
284 return macsec_sectag_len(sci_present) + sizeof(__be16);
287 /* Fill SecTAG according to IEEE 802.1AE-2006 10.5.3 */
288 static void macsec_fill_sectag(struct macsec_eth_header *h,
289 const struct macsec_secy *secy, u32 pn,
292 const struct macsec_tx_sc *tx_sc = &secy->tx_sc;
294 memset(&h->tci_an, 0, macsec_sectag_len(sci_present));
295 h->eth.h_proto = htons(ETH_P_MACSEC);
298 h->tci_an |= MACSEC_TCI_SC;
299 memcpy(&h->secure_channel_id, &secy->sci,
300 sizeof(h->secure_channel_id));
302 if (tx_sc->end_station)
303 h->tci_an |= MACSEC_TCI_ES;
305 h->tci_an |= MACSEC_TCI_SCB;
308 h->packet_number = htonl(pn);
310 /* with GCM, C/E clear for !encrypt, both set for encrypt */
312 h->tci_an |= MACSEC_TCI_CONFID;
313 else if (secy->icv_len != MACSEC_DEFAULT_ICV_LEN)
314 h->tci_an |= MACSEC_TCI_C;
316 h->tci_an |= tx_sc->encoding_sa;
319 static void macsec_set_shortlen(struct macsec_eth_header *h, size_t data_len)
321 if (data_len < MIN_NON_SHORT_LEN)
322 h->short_length = data_len;
325 /* Checks if a MACsec interface is being offloaded to an hardware engine */
326 static bool macsec_is_offloaded(struct macsec_dev *macsec)
328 if (macsec->offload == MACSEC_OFFLOAD_MAC ||
329 macsec->offload == MACSEC_OFFLOAD_PHY)
335 /* Checks if underlying layers implement MACsec offloading functions. */
336 static bool macsec_check_offload(enum macsec_offload offload,
337 struct macsec_dev *macsec)
339 if (!macsec || !macsec->real_dev)
342 if (offload == MACSEC_OFFLOAD_PHY)
343 return macsec->real_dev->phydev &&
344 macsec->real_dev->phydev->macsec_ops;
345 else if (offload == MACSEC_OFFLOAD_MAC)
346 return macsec->real_dev->features & NETIF_F_HW_MACSEC &&
347 macsec->real_dev->macsec_ops;
352 static const struct macsec_ops *__macsec_get_ops(enum macsec_offload offload,
353 struct macsec_dev *macsec,
354 struct macsec_context *ctx)
357 memset(ctx, 0, sizeof(*ctx));
358 ctx->offload = offload;
360 if (offload == MACSEC_OFFLOAD_PHY)
361 ctx->phydev = macsec->real_dev->phydev;
362 else if (offload == MACSEC_OFFLOAD_MAC)
363 ctx->netdev = macsec->real_dev;
366 if (offload == MACSEC_OFFLOAD_PHY)
367 return macsec->real_dev->phydev->macsec_ops;
369 return macsec->real_dev->macsec_ops;
372 /* Returns a pointer to the MACsec ops struct if any and updates the MACsec
373 * context device reference if provided.
375 static const struct macsec_ops *macsec_get_ops(struct macsec_dev *macsec,
376 struct macsec_context *ctx)
378 if (!macsec_check_offload(macsec->offload, macsec))
381 return __macsec_get_ops(macsec->offload, macsec, ctx);
384 /* validate MACsec packet according to IEEE 802.1AE-2018 9.12 */
385 static bool macsec_validate_skb(struct sk_buff *skb, u16 icv_len, bool xpn)
387 struct macsec_eth_header *h = (struct macsec_eth_header *)skb->data;
388 int len = skb->len - 2 * ETH_ALEN;
389 int extra_len = macsec_extra_len(!!(h->tci_an & MACSEC_TCI_SC)) + icv_len;
391 /* a) It comprises at least 17 octets */
395 /* b) MACsec EtherType: already checked */
397 /* c) V bit is clear */
398 if (h->tci_an & MACSEC_TCI_VERSION)
401 /* d) ES or SCB => !SC */
402 if ((h->tci_an & MACSEC_TCI_ES || h->tci_an & MACSEC_TCI_SCB) &&
403 (h->tci_an & MACSEC_TCI_SC))
406 /* e) Bits 7 and 8 of octet 4 of the SecTAG are clear */
410 /* rx.pn != 0 if not XPN (figure 10-5 with 802.11AEbw-2013 amendment) */
411 if (!h->packet_number && !xpn)
414 /* length check, f) g) h) i) */
416 return len == extra_len + h->short_length;
417 return len >= extra_len + MIN_NON_SHORT_LEN;
420 #define MACSEC_NEEDED_HEADROOM (macsec_extra_len(true))
421 #define MACSEC_NEEDED_TAILROOM MACSEC_STD_ICV_LEN
423 static void macsec_fill_iv_xpn(unsigned char *iv, ssci_t ssci, u64 pn,
426 struct gcm_iv_xpn *gcm_iv = (struct gcm_iv_xpn *)iv;
428 gcm_iv->ssci = ssci ^ salt.ssci;
429 gcm_iv->pn = cpu_to_be64(pn) ^ salt.pn;
432 static void macsec_fill_iv(unsigned char *iv, sci_t sci, u32 pn)
434 struct gcm_iv *gcm_iv = (struct gcm_iv *)iv;
437 gcm_iv->pn = htonl(pn);
440 static struct macsec_eth_header *macsec_ethhdr(struct sk_buff *skb)
442 return (struct macsec_eth_header *)skb_mac_header(skb);
445 static void __macsec_pn_wrapped(struct macsec_secy *secy,
446 struct macsec_tx_sa *tx_sa)
448 pr_debug("PN wrapped, transitioning to !oper\n");
449 tx_sa->active = false;
450 if (secy->protect_frames)
451 secy->operational = false;
454 void macsec_pn_wrapped(struct macsec_secy *secy, struct macsec_tx_sa *tx_sa)
456 spin_lock_bh(&tx_sa->lock);
457 __macsec_pn_wrapped(secy, tx_sa);
458 spin_unlock_bh(&tx_sa->lock);
460 EXPORT_SYMBOL_GPL(macsec_pn_wrapped);
462 static pn_t tx_sa_update_pn(struct macsec_tx_sa *tx_sa,
463 struct macsec_secy *secy)
467 spin_lock_bh(&tx_sa->lock);
469 pn = tx_sa->next_pn_halves;
473 tx_sa->next_pn_halves.lower++;
475 if (tx_sa->next_pn == 0)
476 __macsec_pn_wrapped(secy, tx_sa);
477 spin_unlock_bh(&tx_sa->lock);
482 static void macsec_encrypt_finish(struct sk_buff *skb, struct net_device *dev)
484 struct macsec_dev *macsec = netdev_priv(dev);
486 skb->dev = macsec->real_dev;
487 skb_reset_mac_header(skb);
488 skb->protocol = eth_hdr(skb)->h_proto;
491 static unsigned int macsec_msdu_len(struct sk_buff *skb)
493 struct macsec_dev *macsec = macsec_priv(skb->dev);
494 struct macsec_secy *secy = &macsec->secy;
495 bool sci_present = macsec_skb_cb(skb)->has_sci;
497 return skb->len - macsec_hdr_len(sci_present) - secy->icv_len;
500 static void macsec_count_tx(struct sk_buff *skb, struct macsec_tx_sc *tx_sc,
501 struct macsec_tx_sa *tx_sa)
503 unsigned int msdu_len = macsec_msdu_len(skb);
504 struct pcpu_tx_sc_stats *txsc_stats = this_cpu_ptr(tx_sc->stats);
506 u64_stats_update_begin(&txsc_stats->syncp);
507 if (tx_sc->encrypt) {
508 txsc_stats->stats.OutOctetsEncrypted += msdu_len;
509 txsc_stats->stats.OutPktsEncrypted++;
510 this_cpu_inc(tx_sa->stats->OutPktsEncrypted);
512 txsc_stats->stats.OutOctetsProtected += msdu_len;
513 txsc_stats->stats.OutPktsProtected++;
514 this_cpu_inc(tx_sa->stats->OutPktsProtected);
516 u64_stats_update_end(&txsc_stats->syncp);
519 static void count_tx(struct net_device *dev, int ret, int len)
521 if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN))
522 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 tfm = crypto_alloc_aead("gcm(aes)", 0, 0);
1338 ret = crypto_aead_setkey(tfm, key, key_len);
1342 ret = crypto_aead_setauthsize(tfm, icv_len);
1348 crypto_free_aead(tfm);
1349 return ERR_PTR(ret);
1352 static int init_rx_sa(struct macsec_rx_sa *rx_sa, char *sak, int key_len,
1355 rx_sa->stats = alloc_percpu(struct macsec_rx_sa_stats);
1359 rx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len);
1360 if (IS_ERR(rx_sa->key.tfm)) {
1361 free_percpu(rx_sa->stats);
1362 return PTR_ERR(rx_sa->key.tfm);
1365 rx_sa->ssci = MACSEC_UNDEF_SSCI;
1366 rx_sa->active = false;
1368 refcount_set(&rx_sa->refcnt, 1);
1369 spin_lock_init(&rx_sa->lock);
1374 static void clear_rx_sa(struct macsec_rx_sa *rx_sa)
1376 rx_sa->active = false;
1378 macsec_rxsa_put(rx_sa);
1381 static void free_rx_sc(struct macsec_rx_sc *rx_sc)
1385 for (i = 0; i < MACSEC_NUM_AN; i++) {
1386 struct macsec_rx_sa *sa = rtnl_dereference(rx_sc->sa[i]);
1388 RCU_INIT_POINTER(rx_sc->sa[i], NULL);
1393 macsec_rxsc_put(rx_sc);
1396 static struct macsec_rx_sc *del_rx_sc(struct macsec_secy *secy, sci_t sci)
1398 struct macsec_rx_sc *rx_sc, __rcu **rx_scp;
1400 for (rx_scp = &secy->rx_sc, rx_sc = rtnl_dereference(*rx_scp);
1402 rx_scp = &rx_sc->next, rx_sc = rtnl_dereference(*rx_scp)) {
1403 if (rx_sc->sci == sci) {
1406 rcu_assign_pointer(*rx_scp, rx_sc->next);
1414 static struct macsec_rx_sc *create_rx_sc(struct net_device *dev, sci_t sci,
1417 struct macsec_rx_sc *rx_sc;
1418 struct macsec_dev *macsec;
1419 struct net_device *real_dev = macsec_priv(dev)->real_dev;
1420 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
1421 struct macsec_secy *secy;
1423 list_for_each_entry(macsec, &rxd->secys, secys) {
1424 if (find_rx_sc_rtnl(&macsec->secy, sci))
1425 return ERR_PTR(-EEXIST);
1428 rx_sc = kzalloc(sizeof(*rx_sc), GFP_KERNEL);
1430 return ERR_PTR(-ENOMEM);
1432 rx_sc->stats = netdev_alloc_pcpu_stats(struct pcpu_rx_sc_stats);
1433 if (!rx_sc->stats) {
1435 return ERR_PTR(-ENOMEM);
1439 rx_sc->active = active;
1440 refcount_set(&rx_sc->refcnt, 1);
1442 secy = &macsec_priv(dev)->secy;
1443 rcu_assign_pointer(rx_sc->next, secy->rx_sc);
1444 rcu_assign_pointer(secy->rx_sc, rx_sc);
1452 static int init_tx_sa(struct macsec_tx_sa *tx_sa, char *sak, int key_len,
1455 tx_sa->stats = alloc_percpu(struct macsec_tx_sa_stats);
1459 tx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len);
1460 if (IS_ERR(tx_sa->key.tfm)) {
1461 free_percpu(tx_sa->stats);
1462 return PTR_ERR(tx_sa->key.tfm);
1465 tx_sa->ssci = MACSEC_UNDEF_SSCI;
1466 tx_sa->active = false;
1467 refcount_set(&tx_sa->refcnt, 1);
1468 spin_lock_init(&tx_sa->lock);
1473 static void clear_tx_sa(struct macsec_tx_sa *tx_sa)
1475 tx_sa->active = false;
1477 macsec_txsa_put(tx_sa);
1480 static struct genl_family macsec_fam;
1482 static struct net_device *get_dev_from_nl(struct net *net,
1483 struct nlattr **attrs)
1485 int ifindex = nla_get_u32(attrs[MACSEC_ATTR_IFINDEX]);
1486 struct net_device *dev;
1488 dev = __dev_get_by_index(net, ifindex);
1490 return ERR_PTR(-ENODEV);
1492 if (!netif_is_macsec(dev))
1493 return ERR_PTR(-ENODEV);
1498 static enum macsec_offload nla_get_offload(const struct nlattr *nla)
1500 return (__force enum macsec_offload)nla_get_u8(nla);
1503 static sci_t nla_get_sci(const struct nlattr *nla)
1505 return (__force sci_t)nla_get_u64(nla);
1508 static int nla_put_sci(struct sk_buff *skb, int attrtype, sci_t value,
1511 return nla_put_u64_64bit(skb, attrtype, (__force u64)value, padattr);
1514 static ssci_t nla_get_ssci(const struct nlattr *nla)
1516 return (__force ssci_t)nla_get_u32(nla);
1519 static int nla_put_ssci(struct sk_buff *skb, int attrtype, ssci_t value)
1521 return nla_put_u32(skb, attrtype, (__force u64)value);
1524 static struct macsec_tx_sa *get_txsa_from_nl(struct net *net,
1525 struct nlattr **attrs,
1526 struct nlattr **tb_sa,
1527 struct net_device **devp,
1528 struct macsec_secy **secyp,
1529 struct macsec_tx_sc **scp,
1532 struct net_device *dev;
1533 struct macsec_secy *secy;
1534 struct macsec_tx_sc *tx_sc;
1535 struct macsec_tx_sa *tx_sa;
1537 if (!tb_sa[MACSEC_SA_ATTR_AN])
1538 return ERR_PTR(-EINVAL);
1540 *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1542 dev = get_dev_from_nl(net, attrs);
1544 return ERR_CAST(dev);
1546 if (*assoc_num >= MACSEC_NUM_AN)
1547 return ERR_PTR(-EINVAL);
1549 secy = &macsec_priv(dev)->secy;
1550 tx_sc = &secy->tx_sc;
1552 tx_sa = rtnl_dereference(tx_sc->sa[*assoc_num]);
1554 return ERR_PTR(-ENODEV);
1562 static struct macsec_rx_sc *get_rxsc_from_nl(struct net *net,
1563 struct nlattr **attrs,
1564 struct nlattr **tb_rxsc,
1565 struct net_device **devp,
1566 struct macsec_secy **secyp)
1568 struct net_device *dev;
1569 struct macsec_secy *secy;
1570 struct macsec_rx_sc *rx_sc;
1573 dev = get_dev_from_nl(net, attrs);
1575 return ERR_CAST(dev);
1577 secy = &macsec_priv(dev)->secy;
1579 if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI])
1580 return ERR_PTR(-EINVAL);
1582 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1583 rx_sc = find_rx_sc_rtnl(secy, sci);
1585 return ERR_PTR(-ENODEV);
1593 static struct macsec_rx_sa *get_rxsa_from_nl(struct net *net,
1594 struct nlattr **attrs,
1595 struct nlattr **tb_rxsc,
1596 struct nlattr **tb_sa,
1597 struct net_device **devp,
1598 struct macsec_secy **secyp,
1599 struct macsec_rx_sc **scp,
1602 struct macsec_rx_sc *rx_sc;
1603 struct macsec_rx_sa *rx_sa;
1605 if (!tb_sa[MACSEC_SA_ATTR_AN])
1606 return ERR_PTR(-EINVAL);
1608 *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1609 if (*assoc_num >= MACSEC_NUM_AN)
1610 return ERR_PTR(-EINVAL);
1612 rx_sc = get_rxsc_from_nl(net, attrs, tb_rxsc, devp, secyp);
1614 return ERR_CAST(rx_sc);
1616 rx_sa = rtnl_dereference(rx_sc->sa[*assoc_num]);
1618 return ERR_PTR(-ENODEV);
1624 static const struct nla_policy macsec_genl_policy[NUM_MACSEC_ATTR] = {
1625 [MACSEC_ATTR_IFINDEX] = { .type = NLA_U32 },
1626 [MACSEC_ATTR_RXSC_CONFIG] = { .type = NLA_NESTED },
1627 [MACSEC_ATTR_SA_CONFIG] = { .type = NLA_NESTED },
1628 [MACSEC_ATTR_OFFLOAD] = { .type = NLA_NESTED },
1631 static const struct nla_policy macsec_genl_rxsc_policy[NUM_MACSEC_RXSC_ATTR] = {
1632 [MACSEC_RXSC_ATTR_SCI] = { .type = NLA_U64 },
1633 [MACSEC_RXSC_ATTR_ACTIVE] = { .type = NLA_U8 },
1636 static const struct nla_policy macsec_genl_sa_policy[NUM_MACSEC_SA_ATTR] = {
1637 [MACSEC_SA_ATTR_AN] = { .type = NLA_U8 },
1638 [MACSEC_SA_ATTR_ACTIVE] = { .type = NLA_U8 },
1639 [MACSEC_SA_ATTR_PN] = NLA_POLICY_MIN_LEN(4),
1640 [MACSEC_SA_ATTR_KEYID] = { .type = NLA_BINARY,
1641 .len = MACSEC_KEYID_LEN, },
1642 [MACSEC_SA_ATTR_KEY] = { .type = NLA_BINARY,
1643 .len = MACSEC_MAX_KEY_LEN, },
1644 [MACSEC_SA_ATTR_SSCI] = { .type = NLA_U32 },
1645 [MACSEC_SA_ATTR_SALT] = { .type = NLA_BINARY,
1646 .len = MACSEC_SALT_LEN, },
1649 static const struct nla_policy macsec_genl_offload_policy[NUM_MACSEC_OFFLOAD_ATTR] = {
1650 [MACSEC_OFFLOAD_ATTR_TYPE] = { .type = NLA_U8 },
1653 /* Offloads an operation to a device driver */
1654 static int macsec_offload(int (* const func)(struct macsec_context *),
1655 struct macsec_context *ctx)
1659 if (unlikely(!func))
1662 if (ctx->offload == MACSEC_OFFLOAD_PHY)
1663 mutex_lock(&ctx->phydev->lock);
1667 if (ctx->offload == MACSEC_OFFLOAD_PHY)
1668 mutex_unlock(&ctx->phydev->lock);
1673 static int parse_sa_config(struct nlattr **attrs, struct nlattr **tb_sa)
1675 if (!attrs[MACSEC_ATTR_SA_CONFIG])
1678 if (nla_parse_nested_deprecated(tb_sa, MACSEC_SA_ATTR_MAX, attrs[MACSEC_ATTR_SA_CONFIG], macsec_genl_sa_policy, NULL))
1684 static int parse_rxsc_config(struct nlattr **attrs, struct nlattr **tb_rxsc)
1686 if (!attrs[MACSEC_ATTR_RXSC_CONFIG])
1689 if (nla_parse_nested_deprecated(tb_rxsc, MACSEC_RXSC_ATTR_MAX, attrs[MACSEC_ATTR_RXSC_CONFIG], macsec_genl_rxsc_policy, NULL))
1695 static bool validate_add_rxsa(struct nlattr **attrs)
1697 if (!attrs[MACSEC_SA_ATTR_AN] ||
1698 !attrs[MACSEC_SA_ATTR_KEY] ||
1699 !attrs[MACSEC_SA_ATTR_KEYID])
1702 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
1705 if (attrs[MACSEC_SA_ATTR_PN] &&
1706 nla_get_u64(attrs[MACSEC_SA_ATTR_PN]) == 0)
1709 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
1710 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
1714 if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN)
1720 static int macsec_add_rxsa(struct sk_buff *skb, struct genl_info *info)
1722 struct net_device *dev;
1723 struct nlattr **attrs = info->attrs;
1724 struct macsec_secy *secy;
1725 struct macsec_rx_sc *rx_sc;
1726 struct macsec_rx_sa *rx_sa;
1727 unsigned char assoc_num;
1729 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1730 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1733 if (!attrs[MACSEC_ATTR_IFINDEX])
1736 if (parse_sa_config(attrs, tb_sa))
1739 if (parse_rxsc_config(attrs, tb_rxsc))
1742 if (!validate_add_rxsa(tb_sa))
1746 rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy);
1747 if (IS_ERR(rx_sc)) {
1749 return PTR_ERR(rx_sc);
1752 assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1754 if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) {
1755 pr_notice("macsec: nl: add_rxsa: bad key length: %d != %d\n",
1756 nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len);
1761 pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
1762 if (tb_sa[MACSEC_SA_ATTR_PN] &&
1763 nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
1764 pr_notice("macsec: nl: add_rxsa: bad pn length: %d != %d\n",
1765 nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
1771 if (!tb_sa[MACSEC_SA_ATTR_SSCI] || !tb_sa[MACSEC_SA_ATTR_SALT]) {
1776 if (nla_len(tb_sa[MACSEC_SA_ATTR_SALT]) != MACSEC_SALT_LEN) {
1777 pr_notice("macsec: nl: add_rxsa: bad salt length: %d != %d\n",
1778 nla_len(tb_sa[MACSEC_SA_ATTR_SALT]),
1785 rx_sa = rtnl_dereference(rx_sc->sa[assoc_num]);
1791 rx_sa = kmalloc(sizeof(*rx_sa), GFP_KERNEL);
1797 err = init_rx_sa(rx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
1798 secy->key_len, secy->icv_len);
1805 if (tb_sa[MACSEC_SA_ATTR_PN]) {
1806 spin_lock_bh(&rx_sa->lock);
1807 rx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
1808 spin_unlock_bh(&rx_sa->lock);
1811 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
1812 rx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
1817 rx_sa->ssci = nla_get_ssci(tb_sa[MACSEC_SA_ATTR_SSCI]);
1818 nla_memcpy(rx_sa->key.salt.bytes, tb_sa[MACSEC_SA_ATTR_SALT],
1822 /* If h/w offloading is available, propagate to the device */
1823 if (macsec_is_offloaded(netdev_priv(dev))) {
1824 const struct macsec_ops *ops;
1825 struct macsec_context ctx;
1827 ops = macsec_get_ops(netdev_priv(dev), &ctx);
1833 ctx.sa.assoc_num = assoc_num;
1834 ctx.sa.rx_sa = rx_sa;
1836 memcpy(ctx.sa.key, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
1839 err = macsec_offload(ops->mdo_add_rxsa, &ctx);
1840 memzero_explicit(ctx.sa.key, secy->key_len);
1845 nla_memcpy(rx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN);
1846 rcu_assign_pointer(rx_sc->sa[assoc_num], rx_sa);
1853 macsec_rxsa_put(rx_sa);
1858 static bool validate_add_rxsc(struct nlattr **attrs)
1860 if (!attrs[MACSEC_RXSC_ATTR_SCI])
1863 if (attrs[MACSEC_RXSC_ATTR_ACTIVE]) {
1864 if (nla_get_u8(attrs[MACSEC_RXSC_ATTR_ACTIVE]) > 1)
1871 static int macsec_add_rxsc(struct sk_buff *skb, struct genl_info *info)
1873 struct net_device *dev;
1874 sci_t sci = MACSEC_UNDEF_SCI;
1875 struct nlattr **attrs = info->attrs;
1876 struct macsec_rx_sc *rx_sc;
1877 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1878 struct macsec_secy *secy;
1882 if (!attrs[MACSEC_ATTR_IFINDEX])
1885 if (parse_rxsc_config(attrs, tb_rxsc))
1888 if (!validate_add_rxsc(tb_rxsc))
1892 dev = get_dev_from_nl(genl_info_net(info), attrs);
1895 return PTR_ERR(dev);
1898 secy = &macsec_priv(dev)->secy;
1899 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1901 if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE])
1902 active = nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]);
1904 rx_sc = create_rx_sc(dev, sci, active);
1905 if (IS_ERR(rx_sc)) {
1907 return PTR_ERR(rx_sc);
1910 if (macsec_is_offloaded(netdev_priv(dev))) {
1911 const struct macsec_ops *ops;
1912 struct macsec_context ctx;
1914 ops = macsec_get_ops(netdev_priv(dev), &ctx);
1923 ret = macsec_offload(ops->mdo_add_rxsc, &ctx);
1933 del_rx_sc(secy, sci);
1939 static bool validate_add_txsa(struct nlattr **attrs)
1941 if (!attrs[MACSEC_SA_ATTR_AN] ||
1942 !attrs[MACSEC_SA_ATTR_PN] ||
1943 !attrs[MACSEC_SA_ATTR_KEY] ||
1944 !attrs[MACSEC_SA_ATTR_KEYID])
1947 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
1950 if (nla_get_u64(attrs[MACSEC_SA_ATTR_PN]) == 0)
1953 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
1954 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
1958 if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN)
1964 static int macsec_add_txsa(struct sk_buff *skb, struct genl_info *info)
1966 struct net_device *dev;
1967 struct nlattr **attrs = info->attrs;
1968 struct macsec_secy *secy;
1969 struct macsec_tx_sc *tx_sc;
1970 struct macsec_tx_sa *tx_sa;
1971 unsigned char assoc_num;
1973 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1974 bool was_operational;
1977 if (!attrs[MACSEC_ATTR_IFINDEX])
1980 if (parse_sa_config(attrs, tb_sa))
1983 if (!validate_add_txsa(tb_sa))
1987 dev = get_dev_from_nl(genl_info_net(info), attrs);
1990 return PTR_ERR(dev);
1993 secy = &macsec_priv(dev)->secy;
1994 tx_sc = &secy->tx_sc;
1996 assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1998 if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) {
1999 pr_notice("macsec: nl: add_txsa: bad key length: %d != %d\n",
2000 nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len);
2005 pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
2006 if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
2007 pr_notice("macsec: nl: add_txsa: bad pn length: %d != %d\n",
2008 nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
2014 if (!tb_sa[MACSEC_SA_ATTR_SSCI] || !tb_sa[MACSEC_SA_ATTR_SALT]) {
2019 if (nla_len(tb_sa[MACSEC_SA_ATTR_SALT]) != MACSEC_SALT_LEN) {
2020 pr_notice("macsec: nl: add_txsa: bad salt length: %d != %d\n",
2021 nla_len(tb_sa[MACSEC_SA_ATTR_SALT]),
2028 tx_sa = rtnl_dereference(tx_sc->sa[assoc_num]);
2034 tx_sa = kmalloc(sizeof(*tx_sa), GFP_KERNEL);
2040 err = init_tx_sa(tx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
2041 secy->key_len, secy->icv_len);
2048 spin_lock_bh(&tx_sa->lock);
2049 tx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
2050 spin_unlock_bh(&tx_sa->lock);
2052 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2053 tx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2055 was_operational = secy->operational;
2056 if (assoc_num == tx_sc->encoding_sa && tx_sa->active)
2057 secy->operational = true;
2060 tx_sa->ssci = nla_get_ssci(tb_sa[MACSEC_SA_ATTR_SSCI]);
2061 nla_memcpy(tx_sa->key.salt.bytes, tb_sa[MACSEC_SA_ATTR_SALT],
2065 /* If h/w offloading is available, propagate to the device */
2066 if (macsec_is_offloaded(netdev_priv(dev))) {
2067 const struct macsec_ops *ops;
2068 struct macsec_context ctx;
2070 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2076 ctx.sa.assoc_num = assoc_num;
2077 ctx.sa.tx_sa = tx_sa;
2079 memcpy(ctx.sa.key, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
2082 err = macsec_offload(ops->mdo_add_txsa, &ctx);
2083 memzero_explicit(ctx.sa.key, secy->key_len);
2088 nla_memcpy(tx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN);
2089 rcu_assign_pointer(tx_sc->sa[assoc_num], tx_sa);
2096 secy->operational = was_operational;
2097 macsec_txsa_put(tx_sa);
2102 static int macsec_del_rxsa(struct sk_buff *skb, struct genl_info *info)
2104 struct nlattr **attrs = info->attrs;
2105 struct net_device *dev;
2106 struct macsec_secy *secy;
2107 struct macsec_rx_sc *rx_sc;
2108 struct macsec_rx_sa *rx_sa;
2110 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2111 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2114 if (!attrs[MACSEC_ATTR_IFINDEX])
2117 if (parse_sa_config(attrs, tb_sa))
2120 if (parse_rxsc_config(attrs, tb_rxsc))
2124 rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa,
2125 &dev, &secy, &rx_sc, &assoc_num);
2126 if (IS_ERR(rx_sa)) {
2128 return PTR_ERR(rx_sa);
2131 if (rx_sa->active) {
2136 /* If h/w offloading is available, propagate to the device */
2137 if (macsec_is_offloaded(netdev_priv(dev))) {
2138 const struct macsec_ops *ops;
2139 struct macsec_context ctx;
2141 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2147 ctx.sa.assoc_num = assoc_num;
2148 ctx.sa.rx_sa = rx_sa;
2151 ret = macsec_offload(ops->mdo_del_rxsa, &ctx);
2156 RCU_INIT_POINTER(rx_sc->sa[assoc_num], NULL);
2168 static int macsec_del_rxsc(struct sk_buff *skb, struct genl_info *info)
2170 struct nlattr **attrs = info->attrs;
2171 struct net_device *dev;
2172 struct macsec_secy *secy;
2173 struct macsec_rx_sc *rx_sc;
2175 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2178 if (!attrs[MACSEC_ATTR_IFINDEX])
2181 if (parse_rxsc_config(attrs, tb_rxsc))
2184 if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI])
2188 dev = get_dev_from_nl(genl_info_net(info), info->attrs);
2191 return PTR_ERR(dev);
2194 secy = &macsec_priv(dev)->secy;
2195 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
2197 rx_sc = del_rx_sc(secy, sci);
2203 /* If h/w offloading is available, propagate to the device */
2204 if (macsec_is_offloaded(netdev_priv(dev))) {
2205 const struct macsec_ops *ops;
2206 struct macsec_context ctx;
2208 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2216 ret = macsec_offload(ops->mdo_del_rxsc, &ctx);
2231 static int macsec_del_txsa(struct sk_buff *skb, struct genl_info *info)
2233 struct nlattr **attrs = info->attrs;
2234 struct net_device *dev;
2235 struct macsec_secy *secy;
2236 struct macsec_tx_sc *tx_sc;
2237 struct macsec_tx_sa *tx_sa;
2239 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2242 if (!attrs[MACSEC_ATTR_IFINDEX])
2245 if (parse_sa_config(attrs, tb_sa))
2249 tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa,
2250 &dev, &secy, &tx_sc, &assoc_num);
2251 if (IS_ERR(tx_sa)) {
2253 return PTR_ERR(tx_sa);
2256 if (tx_sa->active) {
2261 /* If h/w offloading is available, propagate to the device */
2262 if (macsec_is_offloaded(netdev_priv(dev))) {
2263 const struct macsec_ops *ops;
2264 struct macsec_context ctx;
2266 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2272 ctx.sa.assoc_num = assoc_num;
2273 ctx.sa.tx_sa = tx_sa;
2276 ret = macsec_offload(ops->mdo_del_txsa, &ctx);
2281 RCU_INIT_POINTER(tx_sc->sa[assoc_num], NULL);
2293 static bool validate_upd_sa(struct nlattr **attrs)
2295 if (!attrs[MACSEC_SA_ATTR_AN] ||
2296 attrs[MACSEC_SA_ATTR_KEY] ||
2297 attrs[MACSEC_SA_ATTR_KEYID] ||
2298 attrs[MACSEC_SA_ATTR_SSCI] ||
2299 attrs[MACSEC_SA_ATTR_SALT])
2302 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
2305 if (attrs[MACSEC_SA_ATTR_PN] && nla_get_u64(attrs[MACSEC_SA_ATTR_PN]) == 0)
2308 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
2309 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
2316 static int macsec_upd_txsa(struct sk_buff *skb, struct genl_info *info)
2318 struct nlattr **attrs = info->attrs;
2319 struct net_device *dev;
2320 struct macsec_secy *secy;
2321 struct macsec_tx_sc *tx_sc;
2322 struct macsec_tx_sa *tx_sa;
2324 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2325 bool was_operational, was_active;
2331 if (!attrs[MACSEC_ATTR_IFINDEX])
2334 if (parse_sa_config(attrs, tb_sa))
2337 if (!validate_upd_sa(tb_sa))
2341 tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa,
2342 &dev, &secy, &tx_sc, &assoc_num);
2343 if (IS_ERR(tx_sa)) {
2345 return PTR_ERR(tx_sa);
2348 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2351 pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
2352 if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
2353 pr_notice("macsec: nl: upd_txsa: bad pn length: %d != %d\n",
2354 nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
2359 spin_lock_bh(&tx_sa->lock);
2360 prev_pn = tx_sa->next_pn_halves;
2361 tx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
2362 spin_unlock_bh(&tx_sa->lock);
2365 was_active = tx_sa->active;
2366 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2367 tx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2369 was_operational = secy->operational;
2370 if (assoc_num == tx_sc->encoding_sa)
2371 secy->operational = tx_sa->active;
2373 /* If h/w offloading is available, propagate to the device */
2374 if (macsec_is_offloaded(netdev_priv(dev))) {
2375 const struct macsec_ops *ops;
2376 struct macsec_context ctx;
2378 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2384 ctx.sa.assoc_num = assoc_num;
2385 ctx.sa.tx_sa = tx_sa;
2388 ret = macsec_offload(ops->mdo_upd_txsa, &ctx);
2398 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2399 spin_lock_bh(&tx_sa->lock);
2400 tx_sa->next_pn_halves = prev_pn;
2401 spin_unlock_bh(&tx_sa->lock);
2403 tx_sa->active = was_active;
2404 secy->operational = was_operational;
2409 static int macsec_upd_rxsa(struct sk_buff *skb, struct genl_info *info)
2411 struct nlattr **attrs = info->attrs;
2412 struct net_device *dev;
2413 struct macsec_secy *secy;
2414 struct macsec_rx_sc *rx_sc;
2415 struct macsec_rx_sa *rx_sa;
2417 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2418 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2425 if (!attrs[MACSEC_ATTR_IFINDEX])
2428 if (parse_rxsc_config(attrs, tb_rxsc))
2431 if (parse_sa_config(attrs, tb_sa))
2434 if (!validate_upd_sa(tb_sa))
2438 rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa,
2439 &dev, &secy, &rx_sc, &assoc_num);
2440 if (IS_ERR(rx_sa)) {
2442 return PTR_ERR(rx_sa);
2445 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2448 pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
2449 if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
2450 pr_notice("macsec: nl: upd_rxsa: bad pn length: %d != %d\n",
2451 nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
2456 spin_lock_bh(&rx_sa->lock);
2457 prev_pn = rx_sa->next_pn_halves;
2458 rx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
2459 spin_unlock_bh(&rx_sa->lock);
2462 was_active = rx_sa->active;
2463 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2464 rx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2466 /* If h/w offloading is available, propagate to the device */
2467 if (macsec_is_offloaded(netdev_priv(dev))) {
2468 const struct macsec_ops *ops;
2469 struct macsec_context ctx;
2471 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2477 ctx.sa.assoc_num = assoc_num;
2478 ctx.sa.rx_sa = rx_sa;
2481 ret = macsec_offload(ops->mdo_upd_rxsa, &ctx);
2490 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2491 spin_lock_bh(&rx_sa->lock);
2492 rx_sa->next_pn_halves = prev_pn;
2493 spin_unlock_bh(&rx_sa->lock);
2495 rx_sa->active = was_active;
2500 static int macsec_upd_rxsc(struct sk_buff *skb, struct genl_info *info)
2502 struct nlattr **attrs = info->attrs;
2503 struct net_device *dev;
2504 struct macsec_secy *secy;
2505 struct macsec_rx_sc *rx_sc;
2506 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2507 unsigned int prev_n_rx_sc;
2511 if (!attrs[MACSEC_ATTR_IFINDEX])
2514 if (parse_rxsc_config(attrs, tb_rxsc))
2517 if (!validate_add_rxsc(tb_rxsc))
2521 rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy);
2522 if (IS_ERR(rx_sc)) {
2524 return PTR_ERR(rx_sc);
2527 was_active = rx_sc->active;
2528 prev_n_rx_sc = secy->n_rx_sc;
2529 if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]) {
2530 bool new = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]);
2532 if (rx_sc->active != new)
2533 secy->n_rx_sc += new ? 1 : -1;
2535 rx_sc->active = new;
2538 /* If h/w offloading is available, propagate to the device */
2539 if (macsec_is_offloaded(netdev_priv(dev))) {
2540 const struct macsec_ops *ops;
2541 struct macsec_context ctx;
2543 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2552 ret = macsec_offload(ops->mdo_upd_rxsc, &ctx);
2562 secy->n_rx_sc = prev_n_rx_sc;
2563 rx_sc->active = was_active;
2568 static bool macsec_is_configured(struct macsec_dev *macsec)
2570 struct macsec_secy *secy = &macsec->secy;
2571 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
2577 for (i = 0; i < MACSEC_NUM_AN; i++)
2584 static int macsec_update_offload(struct net_device *dev, enum macsec_offload offload)
2586 enum macsec_offload prev_offload;
2587 const struct macsec_ops *ops;
2588 struct macsec_context ctx;
2589 struct macsec_dev *macsec;
2592 macsec = macsec_priv(dev);
2594 /* Check if the offloading mode is supported by the underlying layers */
2595 if (offload != MACSEC_OFFLOAD_OFF &&
2596 !macsec_check_offload(offload, macsec))
2599 /* Check if the net device is busy. */
2600 if (netif_running(dev))
2603 /* Check if the device already has rules configured: we do not support
2606 if (macsec_is_configured(macsec))
2609 prev_offload = macsec->offload;
2611 ops = __macsec_get_ops(offload == MACSEC_OFFLOAD_OFF ? prev_offload : offload,
2616 macsec->offload = offload;
2618 ctx.secy = &macsec->secy;
2619 ret = offload == MACSEC_OFFLOAD_OFF ? macsec_offload(ops->mdo_del_secy, &ctx)
2620 : macsec_offload(ops->mdo_add_secy, &ctx);
2622 macsec->offload = prev_offload;
2627 static int macsec_upd_offload(struct sk_buff *skb, struct genl_info *info)
2629 struct nlattr *tb_offload[MACSEC_OFFLOAD_ATTR_MAX + 1];
2630 struct nlattr **attrs = info->attrs;
2631 enum macsec_offload offload;
2632 struct macsec_dev *macsec;
2633 struct net_device *dev;
2636 if (!attrs[MACSEC_ATTR_IFINDEX])
2639 if (!attrs[MACSEC_ATTR_OFFLOAD])
2642 if (nla_parse_nested_deprecated(tb_offload, MACSEC_OFFLOAD_ATTR_MAX,
2643 attrs[MACSEC_ATTR_OFFLOAD],
2644 macsec_genl_offload_policy, NULL))
2649 dev = get_dev_from_nl(genl_info_net(info), attrs);
2654 macsec = macsec_priv(dev);
2656 if (!tb_offload[MACSEC_OFFLOAD_ATTR_TYPE]) {
2661 offload = nla_get_u8(tb_offload[MACSEC_OFFLOAD_ATTR_TYPE]);
2663 if (macsec->offload != offload)
2664 ret = macsec_update_offload(dev, offload);
2670 static void get_tx_sa_stats(struct net_device *dev, int an,
2671 struct macsec_tx_sa *tx_sa,
2672 struct macsec_tx_sa_stats *sum)
2674 struct macsec_dev *macsec = macsec_priv(dev);
2677 /* If h/w offloading is available, propagate to the device */
2678 if (macsec_is_offloaded(macsec)) {
2679 const struct macsec_ops *ops;
2680 struct macsec_context ctx;
2682 ops = macsec_get_ops(macsec, &ctx);
2684 ctx.sa.assoc_num = an;
2685 ctx.sa.tx_sa = tx_sa;
2686 ctx.stats.tx_sa_stats = sum;
2687 ctx.secy = &macsec_priv(dev)->secy;
2688 macsec_offload(ops->mdo_get_tx_sa_stats, &ctx);
2693 for_each_possible_cpu(cpu) {
2694 const struct macsec_tx_sa_stats *stats =
2695 per_cpu_ptr(tx_sa->stats, cpu);
2697 sum->OutPktsProtected += stats->OutPktsProtected;
2698 sum->OutPktsEncrypted += stats->OutPktsEncrypted;
2702 static int copy_tx_sa_stats(struct sk_buff *skb, struct macsec_tx_sa_stats *sum)
2704 if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_PROTECTED,
2705 sum->OutPktsProtected) ||
2706 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_ENCRYPTED,
2707 sum->OutPktsEncrypted))
2713 static void get_rx_sa_stats(struct net_device *dev,
2714 struct macsec_rx_sc *rx_sc, int an,
2715 struct macsec_rx_sa *rx_sa,
2716 struct macsec_rx_sa_stats *sum)
2718 struct macsec_dev *macsec = macsec_priv(dev);
2721 /* If h/w offloading is available, propagate to the device */
2722 if (macsec_is_offloaded(macsec)) {
2723 const struct macsec_ops *ops;
2724 struct macsec_context ctx;
2726 ops = macsec_get_ops(macsec, &ctx);
2728 ctx.sa.assoc_num = an;
2729 ctx.sa.rx_sa = rx_sa;
2730 ctx.stats.rx_sa_stats = sum;
2731 ctx.secy = &macsec_priv(dev)->secy;
2733 macsec_offload(ops->mdo_get_rx_sa_stats, &ctx);
2738 for_each_possible_cpu(cpu) {
2739 const struct macsec_rx_sa_stats *stats =
2740 per_cpu_ptr(rx_sa->stats, cpu);
2742 sum->InPktsOK += stats->InPktsOK;
2743 sum->InPktsInvalid += stats->InPktsInvalid;
2744 sum->InPktsNotValid += stats->InPktsNotValid;
2745 sum->InPktsNotUsingSA += stats->InPktsNotUsingSA;
2746 sum->InPktsUnusedSA += stats->InPktsUnusedSA;
2750 static int copy_rx_sa_stats(struct sk_buff *skb,
2751 struct macsec_rx_sa_stats *sum)
2753 if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_OK, sum->InPktsOK) ||
2754 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_INVALID,
2755 sum->InPktsInvalid) ||
2756 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_VALID,
2757 sum->InPktsNotValid) ||
2758 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_USING_SA,
2759 sum->InPktsNotUsingSA) ||
2760 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_UNUSED_SA,
2761 sum->InPktsUnusedSA))
2767 static void get_rx_sc_stats(struct net_device *dev,
2768 struct macsec_rx_sc *rx_sc,
2769 struct macsec_rx_sc_stats *sum)
2771 struct macsec_dev *macsec = macsec_priv(dev);
2774 /* If h/w offloading is available, propagate to the device */
2775 if (macsec_is_offloaded(macsec)) {
2776 const struct macsec_ops *ops;
2777 struct macsec_context ctx;
2779 ops = macsec_get_ops(macsec, &ctx);
2781 ctx.stats.rx_sc_stats = sum;
2782 ctx.secy = &macsec_priv(dev)->secy;
2784 macsec_offload(ops->mdo_get_rx_sc_stats, &ctx);
2789 for_each_possible_cpu(cpu) {
2790 const struct pcpu_rx_sc_stats *stats;
2791 struct macsec_rx_sc_stats tmp;
2794 stats = per_cpu_ptr(rx_sc->stats, cpu);
2796 start = u64_stats_fetch_begin(&stats->syncp);
2797 memcpy(&tmp, &stats->stats, sizeof(tmp));
2798 } while (u64_stats_fetch_retry(&stats->syncp, start));
2800 sum->InOctetsValidated += tmp.InOctetsValidated;
2801 sum->InOctetsDecrypted += tmp.InOctetsDecrypted;
2802 sum->InPktsUnchecked += tmp.InPktsUnchecked;
2803 sum->InPktsDelayed += tmp.InPktsDelayed;
2804 sum->InPktsOK += tmp.InPktsOK;
2805 sum->InPktsInvalid += tmp.InPktsInvalid;
2806 sum->InPktsLate += tmp.InPktsLate;
2807 sum->InPktsNotValid += tmp.InPktsNotValid;
2808 sum->InPktsNotUsingSA += tmp.InPktsNotUsingSA;
2809 sum->InPktsUnusedSA += tmp.InPktsUnusedSA;
2813 static int copy_rx_sc_stats(struct sk_buff *skb, struct macsec_rx_sc_stats *sum)
2815 if (nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_VALIDATED,
2816 sum->InOctetsValidated,
2817 MACSEC_RXSC_STATS_ATTR_PAD) ||
2818 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_DECRYPTED,
2819 sum->InOctetsDecrypted,
2820 MACSEC_RXSC_STATS_ATTR_PAD) ||
2821 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNCHECKED,
2822 sum->InPktsUnchecked,
2823 MACSEC_RXSC_STATS_ATTR_PAD) ||
2824 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_DELAYED,
2826 MACSEC_RXSC_STATS_ATTR_PAD) ||
2827 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_OK,
2829 MACSEC_RXSC_STATS_ATTR_PAD) ||
2830 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_INVALID,
2832 MACSEC_RXSC_STATS_ATTR_PAD) ||
2833 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_LATE,
2835 MACSEC_RXSC_STATS_ATTR_PAD) ||
2836 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_VALID,
2837 sum->InPktsNotValid,
2838 MACSEC_RXSC_STATS_ATTR_PAD) ||
2839 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_USING_SA,
2840 sum->InPktsNotUsingSA,
2841 MACSEC_RXSC_STATS_ATTR_PAD) ||
2842 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNUSED_SA,
2843 sum->InPktsUnusedSA,
2844 MACSEC_RXSC_STATS_ATTR_PAD))
2850 static void get_tx_sc_stats(struct net_device *dev,
2851 struct macsec_tx_sc_stats *sum)
2853 struct macsec_dev *macsec = macsec_priv(dev);
2856 /* If h/w offloading is available, propagate to the device */
2857 if (macsec_is_offloaded(macsec)) {
2858 const struct macsec_ops *ops;
2859 struct macsec_context ctx;
2861 ops = macsec_get_ops(macsec, &ctx);
2863 ctx.stats.tx_sc_stats = sum;
2864 ctx.secy = &macsec_priv(dev)->secy;
2865 macsec_offload(ops->mdo_get_tx_sc_stats, &ctx);
2870 for_each_possible_cpu(cpu) {
2871 const struct pcpu_tx_sc_stats *stats;
2872 struct macsec_tx_sc_stats tmp;
2875 stats = per_cpu_ptr(macsec_priv(dev)->secy.tx_sc.stats, cpu);
2877 start = u64_stats_fetch_begin(&stats->syncp);
2878 memcpy(&tmp, &stats->stats, sizeof(tmp));
2879 } while (u64_stats_fetch_retry(&stats->syncp, start));
2881 sum->OutPktsProtected += tmp.OutPktsProtected;
2882 sum->OutPktsEncrypted += tmp.OutPktsEncrypted;
2883 sum->OutOctetsProtected += tmp.OutOctetsProtected;
2884 sum->OutOctetsEncrypted += tmp.OutOctetsEncrypted;
2888 static int copy_tx_sc_stats(struct sk_buff *skb, struct macsec_tx_sc_stats *sum)
2890 if (nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_PROTECTED,
2891 sum->OutPktsProtected,
2892 MACSEC_TXSC_STATS_ATTR_PAD) ||
2893 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_ENCRYPTED,
2894 sum->OutPktsEncrypted,
2895 MACSEC_TXSC_STATS_ATTR_PAD) ||
2896 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_PROTECTED,
2897 sum->OutOctetsProtected,
2898 MACSEC_TXSC_STATS_ATTR_PAD) ||
2899 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_ENCRYPTED,
2900 sum->OutOctetsEncrypted,
2901 MACSEC_TXSC_STATS_ATTR_PAD))
2907 static void get_secy_stats(struct net_device *dev, struct macsec_dev_stats *sum)
2909 struct macsec_dev *macsec = macsec_priv(dev);
2912 /* If h/w offloading is available, propagate to the device */
2913 if (macsec_is_offloaded(macsec)) {
2914 const struct macsec_ops *ops;
2915 struct macsec_context ctx;
2917 ops = macsec_get_ops(macsec, &ctx);
2919 ctx.stats.dev_stats = sum;
2920 ctx.secy = &macsec_priv(dev)->secy;
2921 macsec_offload(ops->mdo_get_dev_stats, &ctx);
2926 for_each_possible_cpu(cpu) {
2927 const struct pcpu_secy_stats *stats;
2928 struct macsec_dev_stats tmp;
2931 stats = per_cpu_ptr(macsec_priv(dev)->stats, cpu);
2933 start = u64_stats_fetch_begin(&stats->syncp);
2934 memcpy(&tmp, &stats->stats, sizeof(tmp));
2935 } while (u64_stats_fetch_retry(&stats->syncp, start));
2937 sum->OutPktsUntagged += tmp.OutPktsUntagged;
2938 sum->InPktsUntagged += tmp.InPktsUntagged;
2939 sum->OutPktsTooLong += tmp.OutPktsTooLong;
2940 sum->InPktsNoTag += tmp.InPktsNoTag;
2941 sum->InPktsBadTag += tmp.InPktsBadTag;
2942 sum->InPktsUnknownSCI += tmp.InPktsUnknownSCI;
2943 sum->InPktsNoSCI += tmp.InPktsNoSCI;
2944 sum->InPktsOverrun += tmp.InPktsOverrun;
2948 static int copy_secy_stats(struct sk_buff *skb, struct macsec_dev_stats *sum)
2950 if (nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_UNTAGGED,
2951 sum->OutPktsUntagged,
2952 MACSEC_SECY_STATS_ATTR_PAD) ||
2953 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNTAGGED,
2954 sum->InPktsUntagged,
2955 MACSEC_SECY_STATS_ATTR_PAD) ||
2956 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_TOO_LONG,
2957 sum->OutPktsTooLong,
2958 MACSEC_SECY_STATS_ATTR_PAD) ||
2959 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_TAG,
2961 MACSEC_SECY_STATS_ATTR_PAD) ||
2962 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_BAD_TAG,
2964 MACSEC_SECY_STATS_ATTR_PAD) ||
2965 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNKNOWN_SCI,
2966 sum->InPktsUnknownSCI,
2967 MACSEC_SECY_STATS_ATTR_PAD) ||
2968 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_SCI,
2970 MACSEC_SECY_STATS_ATTR_PAD) ||
2971 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_OVERRUN,
2973 MACSEC_SECY_STATS_ATTR_PAD))
2979 static int nla_put_secy(struct macsec_secy *secy, struct sk_buff *skb)
2981 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
2982 struct nlattr *secy_nest = nla_nest_start_noflag(skb,
2989 switch (secy->key_len) {
2990 case MACSEC_GCM_AES_128_SAK_LEN:
2991 csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_128 : MACSEC_DEFAULT_CIPHER_ID;
2993 case MACSEC_GCM_AES_256_SAK_LEN:
2994 csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_256 : MACSEC_CIPHER_ID_GCM_AES_256;
3000 if (nla_put_sci(skb, MACSEC_SECY_ATTR_SCI, secy->sci,
3001 MACSEC_SECY_ATTR_PAD) ||
3002 nla_put_u64_64bit(skb, MACSEC_SECY_ATTR_CIPHER_SUITE,
3003 csid, MACSEC_SECY_ATTR_PAD) ||
3004 nla_put_u8(skb, MACSEC_SECY_ATTR_ICV_LEN, secy->icv_len) ||
3005 nla_put_u8(skb, MACSEC_SECY_ATTR_OPER, secy->operational) ||
3006 nla_put_u8(skb, MACSEC_SECY_ATTR_PROTECT, secy->protect_frames) ||
3007 nla_put_u8(skb, MACSEC_SECY_ATTR_REPLAY, secy->replay_protect) ||
3008 nla_put_u8(skb, MACSEC_SECY_ATTR_VALIDATE, secy->validate_frames) ||
3009 nla_put_u8(skb, MACSEC_SECY_ATTR_ENCRYPT, tx_sc->encrypt) ||
3010 nla_put_u8(skb, MACSEC_SECY_ATTR_INC_SCI, tx_sc->send_sci) ||
3011 nla_put_u8(skb, MACSEC_SECY_ATTR_ES, tx_sc->end_station) ||
3012 nla_put_u8(skb, MACSEC_SECY_ATTR_SCB, tx_sc->scb) ||
3013 nla_put_u8(skb, MACSEC_SECY_ATTR_ENCODING_SA, tx_sc->encoding_sa))
3016 if (secy->replay_protect) {
3017 if (nla_put_u32(skb, MACSEC_SECY_ATTR_WINDOW, secy->replay_window))
3021 nla_nest_end(skb, secy_nest);
3025 nla_nest_cancel(skb, secy_nest);
3029 static noinline_for_stack int
3030 dump_secy(struct macsec_secy *secy, struct net_device *dev,
3031 struct sk_buff *skb, struct netlink_callback *cb)
3033 struct macsec_tx_sc_stats tx_sc_stats = {0, };
3034 struct macsec_tx_sa_stats tx_sa_stats = {0, };
3035 struct macsec_rx_sc_stats rx_sc_stats = {0, };
3036 struct macsec_rx_sa_stats rx_sa_stats = {0, };
3037 struct macsec_dev *macsec = netdev_priv(dev);
3038 struct macsec_dev_stats dev_stats = {0, };
3039 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
3040 struct nlattr *txsa_list, *rxsc_list;
3041 struct macsec_rx_sc *rx_sc;
3042 struct nlattr *attr;
3046 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
3047 &macsec_fam, NLM_F_MULTI, MACSEC_CMD_GET_TXSC);
3051 genl_dump_check_consistent(cb, hdr);
3053 if (nla_put_u32(skb, MACSEC_ATTR_IFINDEX, dev->ifindex))
3054 goto nla_put_failure;
3056 attr = nla_nest_start_noflag(skb, MACSEC_ATTR_OFFLOAD);
3058 goto nla_put_failure;
3059 if (nla_put_u8(skb, MACSEC_OFFLOAD_ATTR_TYPE, macsec->offload))
3060 goto nla_put_failure;
3061 nla_nest_end(skb, attr);
3063 if (nla_put_secy(secy, skb))
3064 goto nla_put_failure;
3066 attr = nla_nest_start_noflag(skb, MACSEC_ATTR_TXSC_STATS);
3068 goto nla_put_failure;
3070 get_tx_sc_stats(dev, &tx_sc_stats);
3071 if (copy_tx_sc_stats(skb, &tx_sc_stats)) {
3072 nla_nest_cancel(skb, attr);
3073 goto nla_put_failure;
3075 nla_nest_end(skb, attr);
3077 attr = nla_nest_start_noflag(skb, MACSEC_ATTR_SECY_STATS);
3079 goto nla_put_failure;
3080 get_secy_stats(dev, &dev_stats);
3081 if (copy_secy_stats(skb, &dev_stats)) {
3082 nla_nest_cancel(skb, attr);
3083 goto nla_put_failure;
3085 nla_nest_end(skb, attr);
3087 txsa_list = nla_nest_start_noflag(skb, MACSEC_ATTR_TXSA_LIST);
3089 goto nla_put_failure;
3090 for (i = 0, j = 1; i < MACSEC_NUM_AN; i++) {
3091 struct macsec_tx_sa *tx_sa = rtnl_dereference(tx_sc->sa[i]);
3092 struct nlattr *txsa_nest;
3099 txsa_nest = nla_nest_start_noflag(skb, j++);
3101 nla_nest_cancel(skb, txsa_list);
3102 goto nla_put_failure;
3105 attr = nla_nest_start_noflag(skb, MACSEC_SA_ATTR_STATS);
3107 nla_nest_cancel(skb, txsa_nest);
3108 nla_nest_cancel(skb, txsa_list);
3109 goto nla_put_failure;
3111 memset(&tx_sa_stats, 0, sizeof(tx_sa_stats));
3112 get_tx_sa_stats(dev, i, tx_sa, &tx_sa_stats);
3113 if (copy_tx_sa_stats(skb, &tx_sa_stats)) {
3114 nla_nest_cancel(skb, attr);
3115 nla_nest_cancel(skb, txsa_nest);
3116 nla_nest_cancel(skb, txsa_list);
3117 goto nla_put_failure;
3119 nla_nest_end(skb, attr);
3122 pn = tx_sa->next_pn;
3123 pn_len = MACSEC_XPN_PN_LEN;
3125 pn = tx_sa->next_pn_halves.lower;
3126 pn_len = MACSEC_DEFAULT_PN_LEN;
3129 if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) ||
3130 nla_put(skb, MACSEC_SA_ATTR_PN, pn_len, &pn) ||
3131 nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, tx_sa->key.id) ||
3132 (secy->xpn && nla_put_ssci(skb, MACSEC_SA_ATTR_SSCI, tx_sa->ssci)) ||
3133 nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, tx_sa->active)) {
3134 nla_nest_cancel(skb, txsa_nest);
3135 nla_nest_cancel(skb, txsa_list);
3136 goto nla_put_failure;
3139 nla_nest_end(skb, txsa_nest);
3141 nla_nest_end(skb, txsa_list);
3143 rxsc_list = nla_nest_start_noflag(skb, MACSEC_ATTR_RXSC_LIST);
3145 goto nla_put_failure;
3148 for_each_rxsc_rtnl(secy, rx_sc) {
3150 struct nlattr *rxsa_list;
3151 struct nlattr *rxsc_nest = nla_nest_start_noflag(skb, j++);
3154 nla_nest_cancel(skb, rxsc_list);
3155 goto nla_put_failure;
3158 if (nla_put_u8(skb, MACSEC_RXSC_ATTR_ACTIVE, rx_sc->active) ||
3159 nla_put_sci(skb, MACSEC_RXSC_ATTR_SCI, rx_sc->sci,
3160 MACSEC_RXSC_ATTR_PAD)) {
3161 nla_nest_cancel(skb, rxsc_nest);
3162 nla_nest_cancel(skb, rxsc_list);
3163 goto nla_put_failure;
3166 attr = nla_nest_start_noflag(skb, MACSEC_RXSC_ATTR_STATS);
3168 nla_nest_cancel(skb, rxsc_nest);
3169 nla_nest_cancel(skb, rxsc_list);
3170 goto nla_put_failure;
3172 memset(&rx_sc_stats, 0, sizeof(rx_sc_stats));
3173 get_rx_sc_stats(dev, rx_sc, &rx_sc_stats);
3174 if (copy_rx_sc_stats(skb, &rx_sc_stats)) {
3175 nla_nest_cancel(skb, attr);
3176 nla_nest_cancel(skb, rxsc_nest);
3177 nla_nest_cancel(skb, rxsc_list);
3178 goto nla_put_failure;
3180 nla_nest_end(skb, attr);
3182 rxsa_list = nla_nest_start_noflag(skb,
3183 MACSEC_RXSC_ATTR_SA_LIST);
3185 nla_nest_cancel(skb, rxsc_nest);
3186 nla_nest_cancel(skb, rxsc_list);
3187 goto nla_put_failure;
3190 for (i = 0, k = 1; i < MACSEC_NUM_AN; i++) {
3191 struct macsec_rx_sa *rx_sa = rtnl_dereference(rx_sc->sa[i]);
3192 struct nlattr *rxsa_nest;
3199 rxsa_nest = nla_nest_start_noflag(skb, k++);
3201 nla_nest_cancel(skb, rxsa_list);
3202 nla_nest_cancel(skb, rxsc_nest);
3203 nla_nest_cancel(skb, rxsc_list);
3204 goto nla_put_failure;
3207 attr = nla_nest_start_noflag(skb,
3208 MACSEC_SA_ATTR_STATS);
3210 nla_nest_cancel(skb, rxsa_list);
3211 nla_nest_cancel(skb, rxsc_nest);
3212 nla_nest_cancel(skb, rxsc_list);
3213 goto nla_put_failure;
3215 memset(&rx_sa_stats, 0, sizeof(rx_sa_stats));
3216 get_rx_sa_stats(dev, rx_sc, i, rx_sa, &rx_sa_stats);
3217 if (copy_rx_sa_stats(skb, &rx_sa_stats)) {
3218 nla_nest_cancel(skb, attr);
3219 nla_nest_cancel(skb, rxsa_list);
3220 nla_nest_cancel(skb, rxsc_nest);
3221 nla_nest_cancel(skb, rxsc_list);
3222 goto nla_put_failure;
3224 nla_nest_end(skb, attr);
3227 pn = rx_sa->next_pn;
3228 pn_len = MACSEC_XPN_PN_LEN;
3230 pn = rx_sa->next_pn_halves.lower;
3231 pn_len = MACSEC_DEFAULT_PN_LEN;
3234 if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) ||
3235 nla_put(skb, MACSEC_SA_ATTR_PN, pn_len, &pn) ||
3236 nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, rx_sa->key.id) ||
3237 (secy->xpn && nla_put_ssci(skb, MACSEC_SA_ATTR_SSCI, rx_sa->ssci)) ||
3238 nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, rx_sa->active)) {
3239 nla_nest_cancel(skb, rxsa_nest);
3240 nla_nest_cancel(skb, rxsc_nest);
3241 nla_nest_cancel(skb, rxsc_list);
3242 goto nla_put_failure;
3244 nla_nest_end(skb, rxsa_nest);
3247 nla_nest_end(skb, rxsa_list);
3248 nla_nest_end(skb, rxsc_nest);
3251 nla_nest_end(skb, rxsc_list);
3253 genlmsg_end(skb, hdr);
3258 genlmsg_cancel(skb, hdr);
3262 static int macsec_generation = 1; /* protected by RTNL */
3264 static int macsec_dump_txsc(struct sk_buff *skb, struct netlink_callback *cb)
3266 struct net *net = sock_net(skb->sk);
3267 struct net_device *dev;
3270 dev_idx = cb->args[0];
3275 cb->seq = macsec_generation;
3277 for_each_netdev(net, dev) {
3278 struct macsec_secy *secy;
3283 if (!netif_is_macsec(dev))
3286 secy = &macsec_priv(dev)->secy;
3287 if (dump_secy(secy, dev, skb, cb) < 0)
3299 static const struct genl_small_ops macsec_genl_ops[] = {
3301 .cmd = MACSEC_CMD_GET_TXSC,
3302 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3303 .dumpit = macsec_dump_txsc,
3306 .cmd = MACSEC_CMD_ADD_RXSC,
3307 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3308 .doit = macsec_add_rxsc,
3309 .flags = GENL_ADMIN_PERM,
3312 .cmd = MACSEC_CMD_DEL_RXSC,
3313 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3314 .doit = macsec_del_rxsc,
3315 .flags = GENL_ADMIN_PERM,
3318 .cmd = MACSEC_CMD_UPD_RXSC,
3319 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3320 .doit = macsec_upd_rxsc,
3321 .flags = GENL_ADMIN_PERM,
3324 .cmd = MACSEC_CMD_ADD_TXSA,
3325 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3326 .doit = macsec_add_txsa,
3327 .flags = GENL_ADMIN_PERM,
3330 .cmd = MACSEC_CMD_DEL_TXSA,
3331 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3332 .doit = macsec_del_txsa,
3333 .flags = GENL_ADMIN_PERM,
3336 .cmd = MACSEC_CMD_UPD_TXSA,
3337 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3338 .doit = macsec_upd_txsa,
3339 .flags = GENL_ADMIN_PERM,
3342 .cmd = MACSEC_CMD_ADD_RXSA,
3343 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3344 .doit = macsec_add_rxsa,
3345 .flags = GENL_ADMIN_PERM,
3348 .cmd = MACSEC_CMD_DEL_RXSA,
3349 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3350 .doit = macsec_del_rxsa,
3351 .flags = GENL_ADMIN_PERM,
3354 .cmd = MACSEC_CMD_UPD_RXSA,
3355 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3356 .doit = macsec_upd_rxsa,
3357 .flags = GENL_ADMIN_PERM,
3360 .cmd = MACSEC_CMD_UPD_OFFLOAD,
3361 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3362 .doit = macsec_upd_offload,
3363 .flags = GENL_ADMIN_PERM,
3367 static struct genl_family macsec_fam __ro_after_init = {
3368 .name = MACSEC_GENL_NAME,
3370 .version = MACSEC_GENL_VERSION,
3371 .maxattr = MACSEC_ATTR_MAX,
3372 .policy = macsec_genl_policy,
3374 .module = THIS_MODULE,
3375 .small_ops = macsec_genl_ops,
3376 .n_small_ops = ARRAY_SIZE(macsec_genl_ops),
3377 .resv_start_op = MACSEC_CMD_UPD_OFFLOAD + 1,
3380 static netdev_tx_t macsec_start_xmit(struct sk_buff *skb,
3381 struct net_device *dev)
3383 struct macsec_dev *macsec = netdev_priv(dev);
3384 struct macsec_secy *secy = &macsec->secy;
3385 struct pcpu_secy_stats *secy_stats;
3388 if (macsec_is_offloaded(netdev_priv(dev))) {
3389 struct metadata_dst *md_dst = secy->tx_sc.md_dst;
3392 dst_hold(&md_dst->dst);
3393 skb_dst_set(skb, &md_dst->dst);
3394 skb->dev = macsec->real_dev;
3395 return dev_queue_xmit(skb);
3399 if (!secy->protect_frames) {
3400 secy_stats = this_cpu_ptr(macsec->stats);
3401 u64_stats_update_begin(&secy_stats->syncp);
3402 secy_stats->stats.OutPktsUntagged++;
3403 u64_stats_update_end(&secy_stats->syncp);
3404 skb->dev = macsec->real_dev;
3406 ret = dev_queue_xmit(skb);
3407 count_tx(dev, ret, len);
3411 if (!secy->operational) {
3413 DEV_STATS_INC(dev, tx_dropped);
3414 return NETDEV_TX_OK;
3418 skb = macsec_encrypt(skb, dev);
3420 if (PTR_ERR(skb) != -EINPROGRESS)
3421 DEV_STATS_INC(dev, tx_dropped);
3422 return NETDEV_TX_OK;
3425 macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa);
3427 macsec_encrypt_finish(skb, dev);
3428 ret = dev_queue_xmit(skb);
3429 count_tx(dev, ret, len);
3433 #define MACSEC_FEATURES \
3434 (NETIF_F_SG | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST)
3436 static int macsec_dev_init(struct net_device *dev)
3438 struct macsec_dev *macsec = macsec_priv(dev);
3439 struct net_device *real_dev = macsec->real_dev;
3442 dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
3446 err = gro_cells_init(&macsec->gro_cells, dev);
3448 free_percpu(dev->tstats);
3452 dev->features = real_dev->features & MACSEC_FEATURES;
3453 dev->features |= NETIF_F_LLTX | NETIF_F_GSO_SOFTWARE;
3455 dev->needed_headroom = real_dev->needed_headroom +
3456 MACSEC_NEEDED_HEADROOM;
3457 dev->needed_tailroom = real_dev->needed_tailroom +
3458 MACSEC_NEEDED_TAILROOM;
3460 if (is_zero_ether_addr(dev->dev_addr))
3461 eth_hw_addr_inherit(dev, real_dev);
3462 if (is_zero_ether_addr(dev->broadcast))
3463 memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len);
3465 /* Get macsec's reference to real_dev */
3466 netdev_hold(real_dev, &macsec->dev_tracker, GFP_KERNEL);
3471 static void macsec_dev_uninit(struct net_device *dev)
3473 struct macsec_dev *macsec = macsec_priv(dev);
3475 gro_cells_destroy(&macsec->gro_cells);
3476 free_percpu(dev->tstats);
3479 static netdev_features_t macsec_fix_features(struct net_device *dev,
3480 netdev_features_t features)
3482 struct macsec_dev *macsec = macsec_priv(dev);
3483 struct net_device *real_dev = macsec->real_dev;
3485 features &= (real_dev->features & MACSEC_FEATURES) |
3486 NETIF_F_GSO_SOFTWARE | NETIF_F_SOFT_FEATURES;
3487 features |= NETIF_F_LLTX;
3492 static int macsec_dev_open(struct net_device *dev)
3494 struct macsec_dev *macsec = macsec_priv(dev);
3495 struct net_device *real_dev = macsec->real_dev;
3498 err = dev_uc_add(real_dev, dev->dev_addr);
3502 if (dev->flags & IFF_ALLMULTI) {
3503 err = dev_set_allmulti(real_dev, 1);
3508 if (dev->flags & IFF_PROMISC) {
3509 err = dev_set_promiscuity(real_dev, 1);
3511 goto clear_allmulti;
3514 /* If h/w offloading is available, propagate to the device */
3515 if (macsec_is_offloaded(macsec)) {
3516 const struct macsec_ops *ops;
3517 struct macsec_context ctx;
3519 ops = macsec_get_ops(netdev_priv(dev), &ctx);
3522 goto clear_allmulti;
3525 ctx.secy = &macsec->secy;
3526 err = macsec_offload(ops->mdo_dev_open, &ctx);
3528 goto clear_allmulti;
3531 if (netif_carrier_ok(real_dev))
3532 netif_carrier_on(dev);
3536 if (dev->flags & IFF_ALLMULTI)
3537 dev_set_allmulti(real_dev, -1);
3539 dev_uc_del(real_dev, dev->dev_addr);
3540 netif_carrier_off(dev);
3544 static int macsec_dev_stop(struct net_device *dev)
3546 struct macsec_dev *macsec = macsec_priv(dev);
3547 struct net_device *real_dev = macsec->real_dev;
3549 netif_carrier_off(dev);
3551 /* If h/w offloading is available, propagate to the device */
3552 if (macsec_is_offloaded(macsec)) {
3553 const struct macsec_ops *ops;
3554 struct macsec_context ctx;
3556 ops = macsec_get_ops(macsec, &ctx);
3558 ctx.secy = &macsec->secy;
3559 macsec_offload(ops->mdo_dev_stop, &ctx);
3563 dev_mc_unsync(real_dev, dev);
3564 dev_uc_unsync(real_dev, dev);
3566 if (dev->flags & IFF_ALLMULTI)
3567 dev_set_allmulti(real_dev, -1);
3569 if (dev->flags & IFF_PROMISC)
3570 dev_set_promiscuity(real_dev, -1);
3572 dev_uc_del(real_dev, dev->dev_addr);
3577 static void macsec_dev_change_rx_flags(struct net_device *dev, int change)
3579 struct net_device *real_dev = macsec_priv(dev)->real_dev;
3581 if (!(dev->flags & IFF_UP))
3584 if (change & IFF_ALLMULTI)
3585 dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1);
3587 if (change & IFF_PROMISC)
3588 dev_set_promiscuity(real_dev,
3589 dev->flags & IFF_PROMISC ? 1 : -1);
3592 static void macsec_dev_set_rx_mode(struct net_device *dev)
3594 struct net_device *real_dev = macsec_priv(dev)->real_dev;
3596 dev_mc_sync(real_dev, dev);
3597 dev_uc_sync(real_dev, dev);
3600 static int macsec_set_mac_address(struct net_device *dev, void *p)
3602 struct macsec_dev *macsec = macsec_priv(dev);
3603 struct net_device *real_dev = macsec->real_dev;
3604 struct sockaddr *addr = p;
3607 if (!is_valid_ether_addr(addr->sa_data))
3608 return -EADDRNOTAVAIL;
3610 if (!(dev->flags & IFF_UP))
3613 err = dev_uc_add(real_dev, addr->sa_data);
3617 dev_uc_del(real_dev, dev->dev_addr);
3620 eth_hw_addr_set(dev, addr->sa_data);
3622 /* If h/w offloading is available, propagate to the device */
3623 if (macsec_is_offloaded(macsec)) {
3624 const struct macsec_ops *ops;
3625 struct macsec_context ctx;
3627 ops = macsec_get_ops(macsec, &ctx);
3629 ctx.secy = &macsec->secy;
3630 macsec_offload(ops->mdo_upd_secy, &ctx);
3637 static int macsec_change_mtu(struct net_device *dev, int new_mtu)
3639 struct macsec_dev *macsec = macsec_priv(dev);
3640 unsigned int extra = macsec->secy.icv_len + macsec_extra_len(true);
3642 if (macsec->real_dev->mtu - extra < new_mtu)
3650 static void macsec_get_stats64(struct net_device *dev,
3651 struct rtnl_link_stats64 *s)
3656 dev_fetch_sw_netstats(s, dev->tstats);
3658 s->rx_dropped = atomic_long_read(&dev->stats.__rx_dropped);
3659 s->tx_dropped = atomic_long_read(&dev->stats.__tx_dropped);
3660 s->rx_errors = atomic_long_read(&dev->stats.__rx_errors);
3663 static int macsec_get_iflink(const struct net_device *dev)
3665 return macsec_priv(dev)->real_dev->ifindex;
3668 static const struct net_device_ops macsec_netdev_ops = {
3669 .ndo_init = macsec_dev_init,
3670 .ndo_uninit = macsec_dev_uninit,
3671 .ndo_open = macsec_dev_open,
3672 .ndo_stop = macsec_dev_stop,
3673 .ndo_fix_features = macsec_fix_features,
3674 .ndo_change_mtu = macsec_change_mtu,
3675 .ndo_set_rx_mode = macsec_dev_set_rx_mode,
3676 .ndo_change_rx_flags = macsec_dev_change_rx_flags,
3677 .ndo_set_mac_address = macsec_set_mac_address,
3678 .ndo_start_xmit = macsec_start_xmit,
3679 .ndo_get_stats64 = macsec_get_stats64,
3680 .ndo_get_iflink = macsec_get_iflink,
3683 static const struct device_type macsec_type = {
3687 static const struct nla_policy macsec_rtnl_policy[IFLA_MACSEC_MAX + 1] = {
3688 [IFLA_MACSEC_SCI] = { .type = NLA_U64 },
3689 [IFLA_MACSEC_PORT] = { .type = NLA_U16 },
3690 [IFLA_MACSEC_ICV_LEN] = { .type = NLA_U8 },
3691 [IFLA_MACSEC_CIPHER_SUITE] = { .type = NLA_U64 },
3692 [IFLA_MACSEC_WINDOW] = { .type = NLA_U32 },
3693 [IFLA_MACSEC_ENCODING_SA] = { .type = NLA_U8 },
3694 [IFLA_MACSEC_ENCRYPT] = { .type = NLA_U8 },
3695 [IFLA_MACSEC_PROTECT] = { .type = NLA_U8 },
3696 [IFLA_MACSEC_INC_SCI] = { .type = NLA_U8 },
3697 [IFLA_MACSEC_ES] = { .type = NLA_U8 },
3698 [IFLA_MACSEC_SCB] = { .type = NLA_U8 },
3699 [IFLA_MACSEC_REPLAY_PROTECT] = { .type = NLA_U8 },
3700 [IFLA_MACSEC_VALIDATION] = { .type = NLA_U8 },
3701 [IFLA_MACSEC_OFFLOAD] = { .type = NLA_U8 },
3704 static void macsec_free_netdev(struct net_device *dev)
3706 struct macsec_dev *macsec = macsec_priv(dev);
3708 if (macsec->secy.tx_sc.md_dst)
3709 metadata_dst_free(macsec->secy.tx_sc.md_dst);
3710 free_percpu(macsec->stats);
3711 free_percpu(macsec->secy.tx_sc.stats);
3713 /* Get rid of the macsec's reference to real_dev */
3714 netdev_put(macsec->real_dev, &macsec->dev_tracker);
3717 static void macsec_setup(struct net_device *dev)
3721 dev->max_mtu = ETH_MAX_MTU;
3722 dev->priv_flags |= IFF_NO_QUEUE;
3723 dev->netdev_ops = &macsec_netdev_ops;
3724 dev->needs_free_netdev = true;
3725 dev->priv_destructor = macsec_free_netdev;
3726 SET_NETDEV_DEVTYPE(dev, &macsec_type);
3728 eth_zero_addr(dev->broadcast);
3731 static int macsec_changelink_common(struct net_device *dev,
3732 struct nlattr *data[])
3734 struct macsec_secy *secy;
3735 struct macsec_tx_sc *tx_sc;
3737 secy = &macsec_priv(dev)->secy;
3738 tx_sc = &secy->tx_sc;
3740 if (data[IFLA_MACSEC_ENCODING_SA]) {
3741 struct macsec_tx_sa *tx_sa;
3743 tx_sc->encoding_sa = nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]);
3744 tx_sa = rtnl_dereference(tx_sc->sa[tx_sc->encoding_sa]);
3746 secy->operational = tx_sa && tx_sa->active;
3749 if (data[IFLA_MACSEC_ENCRYPT])
3750 tx_sc->encrypt = !!nla_get_u8(data[IFLA_MACSEC_ENCRYPT]);
3752 if (data[IFLA_MACSEC_PROTECT])
3753 secy->protect_frames = !!nla_get_u8(data[IFLA_MACSEC_PROTECT]);
3755 if (data[IFLA_MACSEC_INC_SCI])
3756 tx_sc->send_sci = !!nla_get_u8(data[IFLA_MACSEC_INC_SCI]);
3758 if (data[IFLA_MACSEC_ES])
3759 tx_sc->end_station = !!nla_get_u8(data[IFLA_MACSEC_ES]);
3761 if (data[IFLA_MACSEC_SCB])
3762 tx_sc->scb = !!nla_get_u8(data[IFLA_MACSEC_SCB]);
3764 if (data[IFLA_MACSEC_REPLAY_PROTECT])
3765 secy->replay_protect = !!nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT]);
3767 if (data[IFLA_MACSEC_VALIDATION])
3768 secy->validate_frames = nla_get_u8(data[IFLA_MACSEC_VALIDATION]);
3770 if (data[IFLA_MACSEC_CIPHER_SUITE]) {
3771 switch (nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE])) {
3772 case MACSEC_CIPHER_ID_GCM_AES_128:
3773 case MACSEC_DEFAULT_CIPHER_ID:
3774 secy->key_len = MACSEC_GCM_AES_128_SAK_LEN;
3777 case MACSEC_CIPHER_ID_GCM_AES_256:
3778 secy->key_len = MACSEC_GCM_AES_256_SAK_LEN;
3781 case MACSEC_CIPHER_ID_GCM_AES_XPN_128:
3782 secy->key_len = MACSEC_GCM_AES_128_SAK_LEN;
3785 case MACSEC_CIPHER_ID_GCM_AES_XPN_256:
3786 secy->key_len = MACSEC_GCM_AES_256_SAK_LEN;
3794 if (data[IFLA_MACSEC_WINDOW]) {
3795 secy->replay_window = nla_get_u32(data[IFLA_MACSEC_WINDOW]);
3797 /* IEEE 802.1AEbw-2013 10.7.8 - maximum replay window
3798 * for XPN cipher suites */
3800 secy->replay_window > MACSEC_XPN_MAX_REPLAY_WINDOW)
3807 static int macsec_changelink(struct net_device *dev, struct nlattr *tb[],
3808 struct nlattr *data[],
3809 struct netlink_ext_ack *extack)
3811 struct macsec_dev *macsec = macsec_priv(dev);
3812 bool macsec_offload_state_change = false;
3813 enum macsec_offload offload;
3814 struct macsec_tx_sc tx_sc;
3815 struct macsec_secy secy;
3821 if (data[IFLA_MACSEC_CIPHER_SUITE] ||
3822 data[IFLA_MACSEC_ICV_LEN] ||
3823 data[IFLA_MACSEC_SCI] ||
3824 data[IFLA_MACSEC_PORT])
3827 /* Keep a copy of unmodified secy and tx_sc, in case the offload
3828 * propagation fails, to revert macsec_changelink_common.
3830 memcpy(&secy, &macsec->secy, sizeof(secy));
3831 memcpy(&tx_sc, &macsec->secy.tx_sc, sizeof(tx_sc));
3833 ret = macsec_changelink_common(dev, data);
3837 if (data[IFLA_MACSEC_OFFLOAD]) {
3838 offload = nla_get_u8(data[IFLA_MACSEC_OFFLOAD]);
3839 if (macsec->offload != offload) {
3840 macsec_offload_state_change = true;
3841 ret = macsec_update_offload(dev, offload);
3847 /* If h/w offloading is available, propagate to the device */
3848 if (!macsec_offload_state_change && macsec_is_offloaded(macsec)) {
3849 const struct macsec_ops *ops;
3850 struct macsec_context ctx;
3852 ops = macsec_get_ops(netdev_priv(dev), &ctx);
3858 ctx.secy = &macsec->secy;
3859 ret = macsec_offload(ops->mdo_upd_secy, &ctx);
3867 memcpy(&macsec->secy.tx_sc, &tx_sc, sizeof(tx_sc));
3868 memcpy(&macsec->secy, &secy, sizeof(secy));
3873 static void macsec_del_dev(struct macsec_dev *macsec)
3877 while (macsec->secy.rx_sc) {
3878 struct macsec_rx_sc *rx_sc = rtnl_dereference(macsec->secy.rx_sc);
3880 rcu_assign_pointer(macsec->secy.rx_sc, rx_sc->next);
3884 for (i = 0; i < MACSEC_NUM_AN; i++) {
3885 struct macsec_tx_sa *sa = rtnl_dereference(macsec->secy.tx_sc.sa[i]);
3888 RCU_INIT_POINTER(macsec->secy.tx_sc.sa[i], NULL);
3894 static void macsec_common_dellink(struct net_device *dev, struct list_head *head)
3896 struct macsec_dev *macsec = macsec_priv(dev);
3897 struct net_device *real_dev = macsec->real_dev;
3899 /* If h/w offloading is available, propagate to the device */
3900 if (macsec_is_offloaded(macsec)) {
3901 const struct macsec_ops *ops;
3902 struct macsec_context ctx;
3904 ops = macsec_get_ops(netdev_priv(dev), &ctx);
3906 ctx.secy = &macsec->secy;
3907 macsec_offload(ops->mdo_del_secy, &ctx);
3911 unregister_netdevice_queue(dev, head);
3912 list_del_rcu(&macsec->secys);
3913 macsec_del_dev(macsec);
3914 netdev_upper_dev_unlink(real_dev, dev);
3916 macsec_generation++;
3919 static void macsec_dellink(struct net_device *dev, struct list_head *head)
3921 struct macsec_dev *macsec = macsec_priv(dev);
3922 struct net_device *real_dev = macsec->real_dev;
3923 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
3925 macsec_common_dellink(dev, head);
3927 if (list_empty(&rxd->secys)) {
3928 netdev_rx_handler_unregister(real_dev);
3933 static int register_macsec_dev(struct net_device *real_dev,
3934 struct net_device *dev)
3936 struct macsec_dev *macsec = macsec_priv(dev);
3937 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
3942 rxd = kmalloc(sizeof(*rxd), GFP_KERNEL);
3946 INIT_LIST_HEAD(&rxd->secys);
3948 err = netdev_rx_handler_register(real_dev, macsec_handle_frame,
3956 list_add_tail_rcu(&macsec->secys, &rxd->secys);
3960 static bool sci_exists(struct net_device *dev, sci_t sci)
3962 struct macsec_rxh_data *rxd = macsec_data_rtnl(dev);
3963 struct macsec_dev *macsec;
3965 list_for_each_entry(macsec, &rxd->secys, secys) {
3966 if (macsec->secy.sci == sci)
3973 static sci_t dev_to_sci(struct net_device *dev, __be16 port)
3975 return make_sci(dev->dev_addr, port);
3978 static int macsec_add_dev(struct net_device *dev, sci_t sci, u8 icv_len)
3980 struct macsec_dev *macsec = macsec_priv(dev);
3981 struct macsec_secy *secy = &macsec->secy;
3983 macsec->stats = netdev_alloc_pcpu_stats(struct pcpu_secy_stats);
3987 secy->tx_sc.stats = netdev_alloc_pcpu_stats(struct pcpu_tx_sc_stats);
3988 if (!secy->tx_sc.stats)
3991 secy->tx_sc.md_dst = metadata_dst_alloc(0, METADATA_MACSEC, GFP_KERNEL);
3992 if (!secy->tx_sc.md_dst)
3993 /* macsec and secy percpu stats will be freed when unregistering
3994 * net_device in macsec_free_netdev()
3998 if (sci == MACSEC_UNDEF_SCI)
3999 sci = dev_to_sci(dev, MACSEC_PORT_ES);
4002 secy->operational = true;
4003 secy->key_len = DEFAULT_SAK_LEN;
4004 secy->icv_len = icv_len;
4005 secy->validate_frames = MACSEC_VALIDATE_DEFAULT;
4006 secy->protect_frames = true;
4007 secy->replay_protect = false;
4008 secy->xpn = DEFAULT_XPN;
4011 secy->tx_sc.md_dst->u.macsec_info.sci = sci;
4012 secy->tx_sc.active = true;
4013 secy->tx_sc.encoding_sa = DEFAULT_ENCODING_SA;
4014 secy->tx_sc.encrypt = DEFAULT_ENCRYPT;
4015 secy->tx_sc.send_sci = DEFAULT_SEND_SCI;
4016 secy->tx_sc.end_station = false;
4017 secy->tx_sc.scb = false;
4022 static struct lock_class_key macsec_netdev_addr_lock_key;
4024 static int macsec_newlink(struct net *net, struct net_device *dev,
4025 struct nlattr *tb[], struct nlattr *data[],
4026 struct netlink_ext_ack *extack)
4028 struct macsec_dev *macsec = macsec_priv(dev);
4029 rx_handler_func_t *rx_handler;
4030 u8 icv_len = MACSEC_DEFAULT_ICV_LEN;
4031 struct net_device *real_dev;
4037 real_dev = __dev_get_by_index(net, nla_get_u32(tb[IFLA_LINK]));
4040 if (real_dev->type != ARPHRD_ETHER)
4043 dev->priv_flags |= IFF_MACSEC;
4045 macsec->real_dev = real_dev;
4047 if (data && data[IFLA_MACSEC_OFFLOAD])
4048 macsec->offload = nla_get_offload(data[IFLA_MACSEC_OFFLOAD]);
4050 /* MACsec offloading is off by default */
4051 macsec->offload = MACSEC_OFFLOAD_OFF;
4053 /* Check if the offloading mode is supported by the underlying layers */
4054 if (macsec->offload != MACSEC_OFFLOAD_OFF &&
4055 !macsec_check_offload(macsec->offload, macsec))
4058 /* send_sci must be set to true when transmit sci explicitly is set */
4059 if ((data && data[IFLA_MACSEC_SCI]) &&
4060 (data && data[IFLA_MACSEC_INC_SCI])) {
4061 u8 send_sci = !!nla_get_u8(data[IFLA_MACSEC_INC_SCI]);
4067 if (data && data[IFLA_MACSEC_ICV_LEN])
4068 icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]);
4069 mtu = real_dev->mtu - icv_len - macsec_extra_len(true);
4075 rx_handler = rtnl_dereference(real_dev->rx_handler);
4076 if (rx_handler && rx_handler != macsec_handle_frame)
4079 err = register_netdevice(dev);
4083 netdev_lockdep_set_classes(dev);
4084 lockdep_set_class(&dev->addr_list_lock,
4085 &macsec_netdev_addr_lock_key);
4087 err = netdev_upper_dev_link(real_dev, dev, extack);
4091 /* need to be already registered so that ->init has run and
4092 * the MAC addr is set
4094 if (data && data[IFLA_MACSEC_SCI])
4095 sci = nla_get_sci(data[IFLA_MACSEC_SCI]);
4096 else if (data && data[IFLA_MACSEC_PORT])
4097 sci = dev_to_sci(dev, nla_get_be16(data[IFLA_MACSEC_PORT]));
4099 sci = dev_to_sci(dev, MACSEC_PORT_ES);
4101 if (rx_handler && sci_exists(real_dev, sci)) {
4106 err = macsec_add_dev(dev, sci, icv_len);
4111 err = macsec_changelink_common(dev, data);
4116 /* If h/w offloading is available, propagate to the device */
4117 if (macsec_is_offloaded(macsec)) {
4118 const struct macsec_ops *ops;
4119 struct macsec_context ctx;
4121 ops = macsec_get_ops(macsec, &ctx);
4123 ctx.secy = &macsec->secy;
4124 err = macsec_offload(ops->mdo_add_secy, &ctx);
4130 err = register_macsec_dev(real_dev, dev);
4134 netif_stacked_transfer_operstate(real_dev, dev);
4135 linkwatch_fire_event(dev);
4137 macsec_generation++;
4142 macsec_del_dev(macsec);
4144 netdev_upper_dev_unlink(real_dev, dev);
4146 unregister_netdevice(dev);
4150 static int macsec_validate_attr(struct nlattr *tb[], struct nlattr *data[],
4151 struct netlink_ext_ack *extack)
4153 u64 csid = MACSEC_DEFAULT_CIPHER_ID;
4154 u8 icv_len = MACSEC_DEFAULT_ICV_LEN;
4161 if (data[IFLA_MACSEC_CIPHER_SUITE])
4162 csid = nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE]);
4164 if (data[IFLA_MACSEC_ICV_LEN]) {
4165 icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]);
4166 if (icv_len != MACSEC_DEFAULT_ICV_LEN) {
4167 char dummy_key[DEFAULT_SAK_LEN] = { 0 };
4168 struct crypto_aead *dummy_tfm;
4170 dummy_tfm = macsec_alloc_tfm(dummy_key,
4173 if (IS_ERR(dummy_tfm))
4174 return PTR_ERR(dummy_tfm);
4175 crypto_free_aead(dummy_tfm);
4180 case MACSEC_CIPHER_ID_GCM_AES_128:
4181 case MACSEC_CIPHER_ID_GCM_AES_256:
4182 case MACSEC_CIPHER_ID_GCM_AES_XPN_128:
4183 case MACSEC_CIPHER_ID_GCM_AES_XPN_256:
4184 case MACSEC_DEFAULT_CIPHER_ID:
4185 if (icv_len < MACSEC_MIN_ICV_LEN ||
4186 icv_len > MACSEC_STD_ICV_LEN)
4193 if (data[IFLA_MACSEC_ENCODING_SA]) {
4194 if (nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]) >= MACSEC_NUM_AN)
4198 for (flag = IFLA_MACSEC_ENCODING_SA + 1;
4199 flag < IFLA_MACSEC_VALIDATION;
4202 if (nla_get_u8(data[flag]) > 1)
4207 es = data[IFLA_MACSEC_ES] ? nla_get_u8(data[IFLA_MACSEC_ES]) : false;
4208 sci = data[IFLA_MACSEC_INC_SCI] ? nla_get_u8(data[IFLA_MACSEC_INC_SCI]) : false;
4209 scb = data[IFLA_MACSEC_SCB] ? nla_get_u8(data[IFLA_MACSEC_SCB]) : false;
4211 if ((sci && (scb || es)) || (scb && es))
4214 if (data[IFLA_MACSEC_VALIDATION] &&
4215 nla_get_u8(data[IFLA_MACSEC_VALIDATION]) > MACSEC_VALIDATE_MAX)
4218 if ((data[IFLA_MACSEC_REPLAY_PROTECT] &&
4219 nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT])) &&
4220 !data[IFLA_MACSEC_WINDOW])
4226 static struct net *macsec_get_link_net(const struct net_device *dev)
4228 return dev_net(macsec_priv(dev)->real_dev);
4231 struct net_device *macsec_get_real_dev(const struct net_device *dev)
4233 return macsec_priv(dev)->real_dev;
4235 EXPORT_SYMBOL_GPL(macsec_get_real_dev);
4237 bool macsec_netdev_is_offloaded(struct net_device *dev)
4239 return macsec_is_offloaded(macsec_priv(dev));
4241 EXPORT_SYMBOL_GPL(macsec_netdev_is_offloaded);
4243 static size_t macsec_get_size(const struct net_device *dev)
4245 return nla_total_size_64bit(8) + /* IFLA_MACSEC_SCI */
4246 nla_total_size(1) + /* IFLA_MACSEC_ICV_LEN */
4247 nla_total_size_64bit(8) + /* IFLA_MACSEC_CIPHER_SUITE */
4248 nla_total_size(4) + /* IFLA_MACSEC_WINDOW */
4249 nla_total_size(1) + /* IFLA_MACSEC_ENCODING_SA */
4250 nla_total_size(1) + /* IFLA_MACSEC_ENCRYPT */
4251 nla_total_size(1) + /* IFLA_MACSEC_PROTECT */
4252 nla_total_size(1) + /* IFLA_MACSEC_INC_SCI */
4253 nla_total_size(1) + /* IFLA_MACSEC_ES */
4254 nla_total_size(1) + /* IFLA_MACSEC_SCB */
4255 nla_total_size(1) + /* IFLA_MACSEC_REPLAY_PROTECT */
4256 nla_total_size(1) + /* IFLA_MACSEC_VALIDATION */
4257 nla_total_size(1) + /* IFLA_MACSEC_OFFLOAD */
4261 static int macsec_fill_info(struct sk_buff *skb,
4262 const struct net_device *dev)
4264 struct macsec_tx_sc *tx_sc;
4265 struct macsec_dev *macsec;
4266 struct macsec_secy *secy;
4269 macsec = macsec_priv(dev);
4270 secy = &macsec->secy;
4271 tx_sc = &secy->tx_sc;
4273 switch (secy->key_len) {
4274 case MACSEC_GCM_AES_128_SAK_LEN:
4275 csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_128 : MACSEC_DEFAULT_CIPHER_ID;
4277 case MACSEC_GCM_AES_256_SAK_LEN:
4278 csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_256 : MACSEC_CIPHER_ID_GCM_AES_256;
4281 goto nla_put_failure;
4284 if (nla_put_sci(skb, IFLA_MACSEC_SCI, secy->sci,
4286 nla_put_u8(skb, IFLA_MACSEC_ICV_LEN, secy->icv_len) ||
4287 nla_put_u64_64bit(skb, IFLA_MACSEC_CIPHER_SUITE,
4288 csid, IFLA_MACSEC_PAD) ||
4289 nla_put_u8(skb, IFLA_MACSEC_ENCODING_SA, tx_sc->encoding_sa) ||
4290 nla_put_u8(skb, IFLA_MACSEC_ENCRYPT, tx_sc->encrypt) ||
4291 nla_put_u8(skb, IFLA_MACSEC_PROTECT, secy->protect_frames) ||
4292 nla_put_u8(skb, IFLA_MACSEC_INC_SCI, tx_sc->send_sci) ||
4293 nla_put_u8(skb, IFLA_MACSEC_ES, tx_sc->end_station) ||
4294 nla_put_u8(skb, IFLA_MACSEC_SCB, tx_sc->scb) ||
4295 nla_put_u8(skb, IFLA_MACSEC_REPLAY_PROTECT, secy->replay_protect) ||
4296 nla_put_u8(skb, IFLA_MACSEC_VALIDATION, secy->validate_frames) ||
4297 nla_put_u8(skb, IFLA_MACSEC_OFFLOAD, macsec->offload) ||
4299 goto nla_put_failure;
4301 if (secy->replay_protect) {
4302 if (nla_put_u32(skb, IFLA_MACSEC_WINDOW, secy->replay_window))
4303 goto nla_put_failure;
4312 static struct rtnl_link_ops macsec_link_ops __read_mostly = {
4314 .priv_size = sizeof(struct macsec_dev),
4315 .maxtype = IFLA_MACSEC_MAX,
4316 .policy = macsec_rtnl_policy,
4317 .setup = macsec_setup,
4318 .validate = macsec_validate_attr,
4319 .newlink = macsec_newlink,
4320 .changelink = macsec_changelink,
4321 .dellink = macsec_dellink,
4322 .get_size = macsec_get_size,
4323 .fill_info = macsec_fill_info,
4324 .get_link_net = macsec_get_link_net,
4327 static bool is_macsec_master(struct net_device *dev)
4329 return rcu_access_pointer(dev->rx_handler) == macsec_handle_frame;
4332 static int macsec_notify(struct notifier_block *this, unsigned long event,
4335 struct net_device *real_dev = netdev_notifier_info_to_dev(ptr);
4338 if (!is_macsec_master(real_dev))
4344 case NETDEV_CHANGE: {
4345 struct macsec_dev *m, *n;
4346 struct macsec_rxh_data *rxd;
4348 rxd = macsec_data_rtnl(real_dev);
4349 list_for_each_entry_safe(m, n, &rxd->secys, secys) {
4350 struct net_device *dev = m->secy.netdev;
4352 netif_stacked_transfer_operstate(real_dev, dev);
4356 case NETDEV_UNREGISTER: {
4357 struct macsec_dev *m, *n;
4358 struct macsec_rxh_data *rxd;
4360 rxd = macsec_data_rtnl(real_dev);
4361 list_for_each_entry_safe(m, n, &rxd->secys, secys) {
4362 macsec_common_dellink(m->secy.netdev, &head);
4365 netdev_rx_handler_unregister(real_dev);
4368 unregister_netdevice_many(&head);
4371 case NETDEV_CHANGEMTU: {
4372 struct macsec_dev *m;
4373 struct macsec_rxh_data *rxd;
4375 rxd = macsec_data_rtnl(real_dev);
4376 list_for_each_entry(m, &rxd->secys, secys) {
4377 struct net_device *dev = m->secy.netdev;
4378 unsigned int mtu = real_dev->mtu - (m->secy.icv_len +
4379 macsec_extra_len(true));
4382 dev_set_mtu(dev, mtu);
4390 static struct notifier_block macsec_notifier = {
4391 .notifier_call = macsec_notify,
4394 static int __init macsec_init(void)
4398 pr_info("MACsec IEEE 802.1AE\n");
4399 err = register_netdevice_notifier(&macsec_notifier);
4403 err = rtnl_link_register(&macsec_link_ops);
4407 err = genl_register_family(&macsec_fam);
4414 rtnl_link_unregister(&macsec_link_ops);
4416 unregister_netdevice_notifier(&macsec_notifier);
4420 static void __exit macsec_exit(void)
4422 genl_unregister_family(&macsec_fam);
4423 rtnl_link_unregister(&macsec_link_ops);
4424 unregister_netdevice_notifier(&macsec_notifier);
4428 module_init(macsec_init);
4429 module_exit(macsec_exit);
4431 MODULE_ALIAS_RTNL_LINK("macsec");
4432 MODULE_ALIAS_GENL_FAMILY("macsec");
4434 MODULE_DESCRIPTION("MACsec IEEE 802.1AE");
4435 MODULE_LICENSE("GPL v2");