1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * drivers/net/macsec.c - MACsec device
5 * Copyright (c) 2015 Sabrina Dubroca <sd@queasysnail.net>
8 #include <linux/types.h>
9 #include <linux/skbuff.h>
10 #include <linux/socket.h>
11 #include <linux/module.h>
12 #include <crypto/aead.h>
13 #include <linux/etherdevice.h>
14 #include <linux/netdevice.h>
15 #include <linux/rtnetlink.h>
16 #include <linux/refcount.h>
17 #include <net/genetlink.h>
19 #include <net/gro_cells.h>
20 #include <net/macsec.h>
21 #include <linux/phy.h>
22 #include <linux/byteorder/generic.h>
23 #include <linux/if_arp.h>
25 #include <uapi/linux/if_macsec.h>
27 #define MACSEC_SCI_LEN 8
29 /* SecTAG length = macsec_eth_header without the optional SCI */
30 #define MACSEC_TAG_LEN 6
32 struct macsec_eth_header {
36 #if defined(__LITTLE_ENDIAN_BITFIELD)
39 #elif defined(__BIG_ENDIAN_BITFIELD)
43 #error "Please fix <asm/byteorder.h>"
46 u8 secure_channel_id[8]; /* optional */
49 #define MACSEC_TCI_VERSION 0x80
50 #define MACSEC_TCI_ES 0x40 /* end station */
51 #define MACSEC_TCI_SC 0x20 /* SCI present */
52 #define MACSEC_TCI_SCB 0x10 /* epon */
53 #define MACSEC_TCI_E 0x08 /* encryption */
54 #define MACSEC_TCI_C 0x04 /* changed text */
55 #define MACSEC_AN_MASK 0x03 /* association number */
56 #define MACSEC_TCI_CONFID (MACSEC_TCI_E | MACSEC_TCI_C)
58 /* minimum secure data length deemed "not short", see IEEE 802.1AE-2006 9.7 */
59 #define MIN_NON_SHORT_LEN 48
61 #define GCM_AES_IV_LEN 12
62 #define DEFAULT_ICV_LEN 16
64 #define for_each_rxsc(secy, sc) \
65 for (sc = rcu_dereference_bh(secy->rx_sc); \
67 sc = rcu_dereference_bh(sc->next))
68 #define for_each_rxsc_rtnl(secy, sc) \
69 for (sc = rtnl_dereference(secy->rx_sc); \
71 sc = rtnl_dereference(sc->next))
73 #define pn_same_half(pn1, pn2) (!(((pn1) >> 31) ^ ((pn2) >> 31)))
77 u8 short_secure_channel_id[4];
85 u8 secure_channel_id[8];
91 #define MACSEC_VALIDATE_DEFAULT MACSEC_VALIDATE_STRICT
93 struct pcpu_secy_stats {
94 struct macsec_dev_stats stats;
95 struct u64_stats_sync syncp;
99 * struct macsec_dev - private data
101 * @real_dev: pointer to underlying netdevice
102 * @stats: MACsec device stats
103 * @secys: linked list of SecY's on the underlying device
104 * @gro_cells: pointer to the Generic Receive Offload cell
105 * @offload: status of offloading on the MACsec device
108 struct macsec_secy secy;
109 struct net_device *real_dev;
110 struct pcpu_secy_stats __percpu *stats;
111 struct list_head secys;
112 struct gro_cells gro_cells;
113 enum macsec_offload offload;
117 * struct macsec_rxh_data - rx_handler private argument
118 * @secys: linked list of SecY's on this underlying device
120 struct macsec_rxh_data {
121 struct list_head secys;
124 static struct macsec_dev *macsec_priv(const struct net_device *dev)
126 return (struct macsec_dev *)netdev_priv(dev);
129 static struct macsec_rxh_data *macsec_data_rcu(const struct net_device *dev)
131 return rcu_dereference_bh(dev->rx_handler_data);
134 static struct macsec_rxh_data *macsec_data_rtnl(const struct net_device *dev)
136 return rtnl_dereference(dev->rx_handler_data);
140 struct aead_request *req;
142 struct macsec_tx_sa *tx_sa;
143 struct macsec_rx_sa *rx_sa;
150 static struct macsec_rx_sa *macsec_rxsa_get(struct macsec_rx_sa __rcu *ptr)
152 struct macsec_rx_sa *sa = rcu_dereference_bh(ptr);
154 if (!sa || !sa->active)
157 if (!refcount_inc_not_zero(&sa->refcnt))
163 static void free_rx_sc_rcu(struct rcu_head *head)
165 struct macsec_rx_sc *rx_sc = container_of(head, struct macsec_rx_sc, rcu_head);
167 free_percpu(rx_sc->stats);
171 static struct macsec_rx_sc *macsec_rxsc_get(struct macsec_rx_sc *sc)
173 return refcount_inc_not_zero(&sc->refcnt) ? sc : NULL;
176 static void macsec_rxsc_put(struct macsec_rx_sc *sc)
178 if (refcount_dec_and_test(&sc->refcnt))
179 call_rcu(&sc->rcu_head, free_rx_sc_rcu);
182 static void free_rxsa(struct rcu_head *head)
184 struct macsec_rx_sa *sa = container_of(head, struct macsec_rx_sa, rcu);
186 crypto_free_aead(sa->key.tfm);
187 free_percpu(sa->stats);
191 static void macsec_rxsa_put(struct macsec_rx_sa *sa)
193 if (refcount_dec_and_test(&sa->refcnt))
194 call_rcu(&sa->rcu, free_rxsa);
197 static struct macsec_tx_sa *macsec_txsa_get(struct macsec_tx_sa __rcu *ptr)
199 struct macsec_tx_sa *sa = rcu_dereference_bh(ptr);
201 if (!sa || !sa->active)
204 if (!refcount_inc_not_zero(&sa->refcnt))
210 static void free_txsa(struct rcu_head *head)
212 struct macsec_tx_sa *sa = container_of(head, struct macsec_tx_sa, rcu);
214 crypto_free_aead(sa->key.tfm);
215 free_percpu(sa->stats);
219 static void macsec_txsa_put(struct macsec_tx_sa *sa)
221 if (refcount_dec_and_test(&sa->refcnt))
222 call_rcu(&sa->rcu, free_txsa);
225 static struct macsec_cb *macsec_skb_cb(struct sk_buff *skb)
227 BUILD_BUG_ON(sizeof(struct macsec_cb) > sizeof(skb->cb));
228 return (struct macsec_cb *)skb->cb;
231 #define MACSEC_PORT_ES (htons(0x0001))
232 #define MACSEC_PORT_SCB (0x0000)
233 #define MACSEC_UNDEF_SCI ((__force sci_t)0xffffffffffffffffULL)
234 #define MACSEC_UNDEF_SSCI ((__force ssci_t)0xffffffff)
236 #define MACSEC_GCM_AES_128_SAK_LEN 16
237 #define MACSEC_GCM_AES_256_SAK_LEN 32
239 #define DEFAULT_SAK_LEN MACSEC_GCM_AES_128_SAK_LEN
240 #define DEFAULT_XPN false
241 #define DEFAULT_SEND_SCI true
242 #define DEFAULT_ENCRYPT false
243 #define DEFAULT_ENCODING_SA 0
244 #define MACSEC_XPN_MAX_REPLAY_WINDOW (((1 << 30) - 1))
246 static bool send_sci(const struct macsec_secy *secy)
248 const struct macsec_tx_sc *tx_sc = &secy->tx_sc;
250 return tx_sc->send_sci ||
251 (secy->n_rx_sc > 1 && !tx_sc->end_station && !tx_sc->scb);
254 static sci_t make_sci(u8 *addr, __be16 port)
258 memcpy(&sci, addr, ETH_ALEN);
259 memcpy(((char *)&sci) + ETH_ALEN, &port, sizeof(port));
264 static sci_t macsec_frame_sci(struct macsec_eth_header *hdr, bool sci_present)
269 memcpy(&sci, hdr->secure_channel_id,
270 sizeof(hdr->secure_channel_id));
272 sci = make_sci(hdr->eth.h_source, MACSEC_PORT_ES);
277 static unsigned int macsec_sectag_len(bool sci_present)
279 return MACSEC_TAG_LEN + (sci_present ? MACSEC_SCI_LEN : 0);
282 static unsigned int macsec_hdr_len(bool sci_present)
284 return macsec_sectag_len(sci_present) + ETH_HLEN;
287 static unsigned int macsec_extra_len(bool sci_present)
289 return macsec_sectag_len(sci_present) + sizeof(__be16);
292 /* Fill SecTAG according to IEEE 802.1AE-2006 10.5.3 */
293 static void macsec_fill_sectag(struct macsec_eth_header *h,
294 const struct macsec_secy *secy, u32 pn,
297 const struct macsec_tx_sc *tx_sc = &secy->tx_sc;
299 memset(&h->tci_an, 0, macsec_sectag_len(sci_present));
300 h->eth.h_proto = htons(ETH_P_MACSEC);
303 h->tci_an |= MACSEC_TCI_SC;
304 memcpy(&h->secure_channel_id, &secy->sci,
305 sizeof(h->secure_channel_id));
307 if (tx_sc->end_station)
308 h->tci_an |= MACSEC_TCI_ES;
310 h->tci_an |= MACSEC_TCI_SCB;
313 h->packet_number = htonl(pn);
315 /* with GCM, C/E clear for !encrypt, both set for encrypt */
317 h->tci_an |= MACSEC_TCI_CONFID;
318 else if (secy->icv_len != DEFAULT_ICV_LEN)
319 h->tci_an |= MACSEC_TCI_C;
321 h->tci_an |= tx_sc->encoding_sa;
324 static void macsec_set_shortlen(struct macsec_eth_header *h, size_t data_len)
326 if (data_len < MIN_NON_SHORT_LEN)
327 h->short_length = data_len;
330 /* Checks if a MACsec interface is being offloaded to an hardware engine */
331 static bool macsec_is_offloaded(struct macsec_dev *macsec)
333 if (macsec->offload == MACSEC_OFFLOAD_MAC ||
334 macsec->offload == MACSEC_OFFLOAD_PHY)
340 /* Checks if underlying layers implement MACsec offloading functions. */
341 static bool macsec_check_offload(enum macsec_offload offload,
342 struct macsec_dev *macsec)
344 if (!macsec || !macsec->real_dev)
347 if (offload == MACSEC_OFFLOAD_PHY)
348 return macsec->real_dev->phydev &&
349 macsec->real_dev->phydev->macsec_ops;
350 else if (offload == MACSEC_OFFLOAD_MAC)
351 return macsec->real_dev->features & NETIF_F_HW_MACSEC &&
352 macsec->real_dev->macsec_ops;
357 static const struct macsec_ops *__macsec_get_ops(enum macsec_offload offload,
358 struct macsec_dev *macsec,
359 struct macsec_context *ctx)
362 memset(ctx, 0, sizeof(*ctx));
363 ctx->offload = offload;
365 if (offload == MACSEC_OFFLOAD_PHY)
366 ctx->phydev = macsec->real_dev->phydev;
367 else if (offload == MACSEC_OFFLOAD_MAC)
368 ctx->netdev = macsec->real_dev;
371 if (offload == MACSEC_OFFLOAD_PHY)
372 return macsec->real_dev->phydev->macsec_ops;
374 return macsec->real_dev->macsec_ops;
377 /* Returns a pointer to the MACsec ops struct if any and updates the MACsec
378 * context device reference if provided.
380 static const struct macsec_ops *macsec_get_ops(struct macsec_dev *macsec,
381 struct macsec_context *ctx)
383 if (!macsec_check_offload(macsec->offload, macsec))
386 return __macsec_get_ops(macsec->offload, macsec, ctx);
389 /* validate MACsec packet according to IEEE 802.1AE-2018 9.12 */
390 static bool macsec_validate_skb(struct sk_buff *skb, u16 icv_len, bool xpn)
392 struct macsec_eth_header *h = (struct macsec_eth_header *)skb->data;
393 int len = skb->len - 2 * ETH_ALEN;
394 int extra_len = macsec_extra_len(!!(h->tci_an & MACSEC_TCI_SC)) + icv_len;
396 /* a) It comprises at least 17 octets */
400 /* b) MACsec EtherType: already checked */
402 /* c) V bit is clear */
403 if (h->tci_an & MACSEC_TCI_VERSION)
406 /* d) ES or SCB => !SC */
407 if ((h->tci_an & MACSEC_TCI_ES || h->tci_an & MACSEC_TCI_SCB) &&
408 (h->tci_an & MACSEC_TCI_SC))
411 /* e) Bits 7 and 8 of octet 4 of the SecTAG are clear */
415 /* rx.pn != 0 if not XPN (figure 10-5 with 802.11AEbw-2013 amendment) */
416 if (!h->packet_number && !xpn)
419 /* length check, f) g) h) i) */
421 return len == extra_len + h->short_length;
422 return len >= extra_len + MIN_NON_SHORT_LEN;
425 #define MACSEC_NEEDED_HEADROOM (macsec_extra_len(true))
426 #define MACSEC_NEEDED_TAILROOM MACSEC_STD_ICV_LEN
428 static void macsec_fill_iv_xpn(unsigned char *iv, ssci_t ssci, u64 pn,
431 struct gcm_iv_xpn *gcm_iv = (struct gcm_iv_xpn *)iv;
433 gcm_iv->ssci = ssci ^ salt.ssci;
434 gcm_iv->pn = cpu_to_be64(pn) ^ salt.pn;
437 static void macsec_fill_iv(unsigned char *iv, sci_t sci, u32 pn)
439 struct gcm_iv *gcm_iv = (struct gcm_iv *)iv;
442 gcm_iv->pn = htonl(pn);
445 static struct macsec_eth_header *macsec_ethhdr(struct sk_buff *skb)
447 return (struct macsec_eth_header *)skb_mac_header(skb);
450 static void __macsec_pn_wrapped(struct macsec_secy *secy,
451 struct macsec_tx_sa *tx_sa)
453 pr_debug("PN wrapped, transitioning to !oper\n");
454 tx_sa->active = false;
455 if (secy->protect_frames)
456 secy->operational = false;
459 void macsec_pn_wrapped(struct macsec_secy *secy, struct macsec_tx_sa *tx_sa)
461 spin_lock_bh(&tx_sa->lock);
462 __macsec_pn_wrapped(secy, tx_sa);
463 spin_unlock_bh(&tx_sa->lock);
465 EXPORT_SYMBOL_GPL(macsec_pn_wrapped);
467 static pn_t tx_sa_update_pn(struct macsec_tx_sa *tx_sa,
468 struct macsec_secy *secy)
472 spin_lock_bh(&tx_sa->lock);
474 pn = tx_sa->next_pn_halves;
478 tx_sa->next_pn_halves.lower++;
480 if (tx_sa->next_pn == 0)
481 __macsec_pn_wrapped(secy, tx_sa);
482 spin_unlock_bh(&tx_sa->lock);
487 static void macsec_encrypt_finish(struct sk_buff *skb, struct net_device *dev)
489 struct macsec_dev *macsec = netdev_priv(dev);
491 skb->dev = macsec->real_dev;
492 skb_reset_mac_header(skb);
493 skb->protocol = eth_hdr(skb)->h_proto;
496 static void macsec_count_tx(struct sk_buff *skb, struct macsec_tx_sc *tx_sc,
497 struct macsec_tx_sa *tx_sa)
499 struct pcpu_tx_sc_stats *txsc_stats = this_cpu_ptr(tx_sc->stats);
501 u64_stats_update_begin(&txsc_stats->syncp);
502 if (tx_sc->encrypt) {
503 txsc_stats->stats.OutOctetsEncrypted += skb->len;
504 txsc_stats->stats.OutPktsEncrypted++;
505 this_cpu_inc(tx_sa->stats->OutPktsEncrypted);
507 txsc_stats->stats.OutOctetsProtected += skb->len;
508 txsc_stats->stats.OutPktsProtected++;
509 this_cpu_inc(tx_sa->stats->OutPktsProtected);
511 u64_stats_update_end(&txsc_stats->syncp);
514 static void count_tx(struct net_device *dev, int ret, int len)
516 if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
517 struct pcpu_sw_netstats *stats = this_cpu_ptr(dev->tstats);
519 u64_stats_update_begin(&stats->syncp);
521 stats->tx_bytes += len;
522 u64_stats_update_end(&stats->syncp);
526 static void macsec_encrypt_done(struct crypto_async_request *base, int err)
528 struct sk_buff *skb = base->data;
529 struct net_device *dev = skb->dev;
530 struct macsec_dev *macsec = macsec_priv(dev);
531 struct macsec_tx_sa *sa = macsec_skb_cb(skb)->tx_sa;
534 aead_request_free(macsec_skb_cb(skb)->req);
537 macsec_encrypt_finish(skb, dev);
538 macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa);
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 = 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 aead_request_set_callback(req, 0, macsec_encrypt_done, skb);
701 ret = crypto_aead_encrypt(req);
702 if (ret == -EINPROGRESS) {
704 } else if (ret != 0) {
707 aead_request_free(req);
708 macsec_txsa_put(tx_sa);
709 return ERR_PTR(-EINVAL);
713 aead_request_free(req);
714 macsec_txsa_put(tx_sa);
719 static bool macsec_post_decrypt(struct sk_buff *skb, struct macsec_secy *secy, u32 pn)
721 struct macsec_rx_sa *rx_sa = macsec_skb_cb(skb)->rx_sa;
722 struct pcpu_rx_sc_stats *rxsc_stats = this_cpu_ptr(rx_sa->sc->stats);
723 struct macsec_eth_header *hdr = macsec_ethhdr(skb);
726 spin_lock(&rx_sa->lock);
727 if (rx_sa->next_pn_halves.lower >= secy->replay_window)
728 lowest_pn = rx_sa->next_pn_halves.lower - secy->replay_window;
730 /* Now perform replay protection check again
731 * (see IEEE 802.1AE-2006 figure 10-5)
733 if (secy->replay_protect && pn < lowest_pn &&
734 (!secy->xpn || pn_same_half(pn, lowest_pn))) {
735 spin_unlock(&rx_sa->lock);
736 u64_stats_update_begin(&rxsc_stats->syncp);
737 rxsc_stats->stats.InPktsLate++;
738 u64_stats_update_end(&rxsc_stats->syncp);
742 if (secy->validate_frames != MACSEC_VALIDATE_DISABLED) {
743 u64_stats_update_begin(&rxsc_stats->syncp);
744 if (hdr->tci_an & MACSEC_TCI_E)
745 rxsc_stats->stats.InOctetsDecrypted += skb->len;
747 rxsc_stats->stats.InOctetsValidated += skb->len;
748 u64_stats_update_end(&rxsc_stats->syncp);
751 if (!macsec_skb_cb(skb)->valid) {
752 spin_unlock(&rx_sa->lock);
755 if (hdr->tci_an & MACSEC_TCI_C ||
756 secy->validate_frames == MACSEC_VALIDATE_STRICT) {
757 u64_stats_update_begin(&rxsc_stats->syncp);
758 rxsc_stats->stats.InPktsNotValid++;
759 u64_stats_update_end(&rxsc_stats->syncp);
763 u64_stats_update_begin(&rxsc_stats->syncp);
764 if (secy->validate_frames == MACSEC_VALIDATE_CHECK) {
765 rxsc_stats->stats.InPktsInvalid++;
766 this_cpu_inc(rx_sa->stats->InPktsInvalid);
767 } else if (pn < lowest_pn) {
768 rxsc_stats->stats.InPktsDelayed++;
770 rxsc_stats->stats.InPktsUnchecked++;
772 u64_stats_update_end(&rxsc_stats->syncp);
774 u64_stats_update_begin(&rxsc_stats->syncp);
775 if (pn < lowest_pn) {
776 rxsc_stats->stats.InPktsDelayed++;
778 rxsc_stats->stats.InPktsOK++;
779 this_cpu_inc(rx_sa->stats->InPktsOK);
781 u64_stats_update_end(&rxsc_stats->syncp);
783 // Instead of "pn >=" - to support pn overflow in xpn
784 if (pn + 1 > rx_sa->next_pn_halves.lower) {
785 rx_sa->next_pn_halves.lower = pn + 1;
786 } else if (secy->xpn &&
787 !pn_same_half(pn, rx_sa->next_pn_halves.lower)) {
788 rx_sa->next_pn_halves.upper++;
789 rx_sa->next_pn_halves.lower = pn + 1;
792 spin_unlock(&rx_sa->lock);
798 static void macsec_reset_skb(struct sk_buff *skb, struct net_device *dev)
800 skb->pkt_type = PACKET_HOST;
801 skb->protocol = eth_type_trans(skb, dev);
803 skb_reset_network_header(skb);
804 if (!skb_transport_header_was_set(skb))
805 skb_reset_transport_header(skb);
806 skb_reset_mac_len(skb);
809 static void macsec_finalize_skb(struct sk_buff *skb, u8 icv_len, u8 hdr_len)
811 skb->ip_summed = CHECKSUM_NONE;
812 memmove(skb->data + hdr_len, skb->data, 2 * ETH_ALEN);
813 skb_pull(skb, hdr_len);
814 pskb_trim_unique(skb, skb->len - icv_len);
817 static void count_rx(struct net_device *dev, int len)
819 struct pcpu_sw_netstats *stats = this_cpu_ptr(dev->tstats);
821 u64_stats_update_begin(&stats->syncp);
823 stats->rx_bytes += len;
824 u64_stats_update_end(&stats->syncp);
827 static void macsec_decrypt_done(struct crypto_async_request *base, int err)
829 struct sk_buff *skb = base->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));
852 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 macsec_rxh_data *rxd;
997 struct macsec_dev *macsec;
1000 rxd = macsec_data_rcu(skb->dev);
1002 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1003 struct sk_buff *nskb;
1004 struct pcpu_secy_stats *secy_stats = this_cpu_ptr(macsec->stats);
1005 struct net_device *ndev = macsec->secy.netdev;
1007 /* If h/w offloading is enabled, HW decodes frames and strips
1008 * the SecTAG, so we have to deduce which port to deliver to.
1010 if (macsec_is_offloaded(macsec) && netif_running(ndev)) {
1011 if (ether_addr_equal_64bits(hdr->h_dest,
1013 /* exact match, divert skb to this port */
1015 skb->pkt_type = PACKET_HOST;
1016 ret = RX_HANDLER_ANOTHER;
1018 } else if (is_multicast_ether_addr_64bits(
1020 /* multicast frame, deliver on this port too */
1021 nskb = skb_clone(skb, GFP_ATOMIC);
1026 if (ether_addr_equal_64bits(hdr->h_dest,
1028 nskb->pkt_type = PACKET_BROADCAST;
1030 nskb->pkt_type = PACKET_MULTICAST;
1037 /* 10.6 If the management control validateFrames is not
1038 * Strict, frames without a SecTAG are received, counted, and
1039 * delivered to the Controlled Port
1041 if (macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) {
1042 u64_stats_update_begin(&secy_stats->syncp);
1043 secy_stats->stats.InPktsNoTag++;
1044 u64_stats_update_end(&secy_stats->syncp);
1048 /* deliver on this port */
1049 nskb = skb_clone(skb, GFP_ATOMIC);
1055 if (netif_rx(nskb) == NET_RX_SUCCESS) {
1056 u64_stats_update_begin(&secy_stats->syncp);
1057 secy_stats->stats.InPktsUntagged++;
1058 u64_stats_update_end(&secy_stats->syncp);
1067 static rx_handler_result_t macsec_handle_frame(struct sk_buff **pskb)
1069 struct sk_buff *skb = *pskb;
1070 struct net_device *dev = skb->dev;
1071 struct macsec_eth_header *hdr;
1072 struct macsec_secy *secy = NULL;
1073 struct macsec_rx_sc *rx_sc;
1074 struct macsec_rx_sa *rx_sa;
1075 struct macsec_rxh_data *rxd;
1076 struct macsec_dev *macsec;
1081 struct pcpu_rx_sc_stats *rxsc_stats;
1082 struct pcpu_secy_stats *secy_stats;
1086 if (skb_headroom(skb) < ETH_HLEN)
1089 hdr = macsec_ethhdr(skb);
1090 if (hdr->eth.h_proto != htons(ETH_P_MACSEC))
1091 return handle_not_macsec(skb);
1093 skb = skb_unshare(skb, GFP_ATOMIC);
1096 return RX_HANDLER_CONSUMED;
1098 pulled_sci = pskb_may_pull(skb, macsec_extra_len(true));
1100 if (!pskb_may_pull(skb, macsec_extra_len(false)))
1104 hdr = macsec_ethhdr(skb);
1106 /* Frames with a SecTAG that has the TCI E bit set but the C
1107 * bit clear are discarded, as this reserved encoding is used
1108 * to identify frames with a SecTAG that are not to be
1109 * delivered to the Controlled Port.
1111 if ((hdr->tci_an & (MACSEC_TCI_C | MACSEC_TCI_E)) == MACSEC_TCI_E)
1112 return RX_HANDLER_PASS;
1114 /* now, pull the extra length */
1115 if (hdr->tci_an & MACSEC_TCI_SC) {
1120 /* ethernet header is part of crypto processing */
1121 skb_push(skb, ETH_HLEN);
1123 macsec_skb_cb(skb)->has_sci = !!(hdr->tci_an & MACSEC_TCI_SC);
1124 macsec_skb_cb(skb)->assoc_num = hdr->tci_an & MACSEC_AN_MASK;
1125 sci = macsec_frame_sci(hdr, macsec_skb_cb(skb)->has_sci);
1128 rxd = macsec_data_rcu(skb->dev);
1130 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1131 struct macsec_rx_sc *sc = find_rx_sc(&macsec->secy, sci);
1133 sc = sc ? macsec_rxsc_get(sc) : NULL;
1136 secy = &macsec->secy;
1146 macsec = macsec_priv(dev);
1147 secy_stats = this_cpu_ptr(macsec->stats);
1148 rxsc_stats = this_cpu_ptr(rx_sc->stats);
1150 if (!macsec_validate_skb(skb, secy->icv_len, secy->xpn)) {
1151 u64_stats_update_begin(&secy_stats->syncp);
1152 secy_stats->stats.InPktsBadTag++;
1153 u64_stats_update_end(&secy_stats->syncp);
1157 rx_sa = macsec_rxsa_get(rx_sc->sa[macsec_skb_cb(skb)->assoc_num]);
1159 /* 10.6.1 if the SA is not in use */
1161 /* If validateFrames is Strict or the C bit in the
1162 * SecTAG is set, discard
1164 if (hdr->tci_an & MACSEC_TCI_C ||
1165 secy->validate_frames == MACSEC_VALIDATE_STRICT) {
1166 u64_stats_update_begin(&rxsc_stats->syncp);
1167 rxsc_stats->stats.InPktsNotUsingSA++;
1168 u64_stats_update_end(&rxsc_stats->syncp);
1172 /* not Strict, the frame (with the SecTAG and ICV
1173 * removed) is delivered to the Controlled Port.
1175 u64_stats_update_begin(&rxsc_stats->syncp);
1176 rxsc_stats->stats.InPktsUnusedSA++;
1177 u64_stats_update_end(&rxsc_stats->syncp);
1181 /* First, PN check to avoid decrypting obviously wrong packets */
1182 hdr_pn = ntohl(hdr->packet_number);
1183 if (secy->replay_protect) {
1186 spin_lock(&rx_sa->lock);
1187 late = rx_sa->next_pn_halves.lower >= secy->replay_window &&
1188 hdr_pn < (rx_sa->next_pn_halves.lower - secy->replay_window);
1191 late = late && pn_same_half(rx_sa->next_pn_halves.lower, hdr_pn);
1192 spin_unlock(&rx_sa->lock);
1195 u64_stats_update_begin(&rxsc_stats->syncp);
1196 rxsc_stats->stats.InPktsLate++;
1197 u64_stats_update_end(&rxsc_stats->syncp);
1202 macsec_skb_cb(skb)->rx_sa = rx_sa;
1204 /* Disabled && !changed text => skip validation */
1205 if (hdr->tci_an & MACSEC_TCI_C ||
1206 secy->validate_frames != MACSEC_VALIDATE_DISABLED)
1207 skb = macsec_decrypt(skb, dev, rx_sa, sci, secy);
1210 /* the decrypt callback needs the reference */
1211 if (PTR_ERR(skb) != -EINPROGRESS) {
1212 macsec_rxsa_put(rx_sa);
1213 macsec_rxsc_put(rx_sc);
1217 return RX_HANDLER_CONSUMED;
1220 if (!macsec_post_decrypt(skb, secy, hdr_pn))
1224 macsec_finalize_skb(skb, secy->icv_len,
1225 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
1226 macsec_reset_skb(skb, secy->netdev);
1229 macsec_rxsa_put(rx_sa);
1230 macsec_rxsc_put(rx_sc);
1234 ret = gro_cells_receive(&macsec->gro_cells, skb);
1235 if (ret == NET_RX_SUCCESS)
1238 macsec->secy.netdev->stats.rx_dropped++;
1243 return RX_HANDLER_CONSUMED;
1246 macsec_rxsa_put(rx_sa);
1248 macsec_rxsc_put(rx_sc);
1253 return RX_HANDLER_CONSUMED;
1256 /* 10.6.1 if the SC is not found */
1257 cbit = !!(hdr->tci_an & MACSEC_TCI_C);
1259 macsec_finalize_skb(skb, DEFAULT_ICV_LEN,
1260 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
1262 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1263 struct sk_buff *nskb;
1265 secy_stats = this_cpu_ptr(macsec->stats);
1267 /* If validateFrames is Strict or the C bit in the
1268 * SecTAG is set, discard
1271 macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) {
1272 u64_stats_update_begin(&secy_stats->syncp);
1273 secy_stats->stats.InPktsNoSCI++;
1274 u64_stats_update_end(&secy_stats->syncp);
1278 /* not strict, the frame (with the SecTAG and ICV
1279 * removed) is delivered to the Controlled Port.
1281 nskb = skb_clone(skb, GFP_ATOMIC);
1285 macsec_reset_skb(nskb, macsec->secy.netdev);
1287 ret = netif_rx(nskb);
1288 if (ret == NET_RX_SUCCESS) {
1289 u64_stats_update_begin(&secy_stats->syncp);
1290 secy_stats->stats.InPktsUnknownSCI++;
1291 u64_stats_update_end(&secy_stats->syncp);
1293 macsec->secy.netdev->stats.rx_dropped++;
1299 return RX_HANDLER_PASS;
1302 static struct crypto_aead *macsec_alloc_tfm(char *key, int key_len, int icv_len)
1304 struct crypto_aead *tfm;
1307 /* Pick a sync gcm(aes) cipher to ensure order is preserved. */
1308 tfm = crypto_alloc_aead("gcm(aes)", 0, CRYPTO_ALG_ASYNC);
1313 ret = crypto_aead_setkey(tfm, key, key_len);
1317 ret = crypto_aead_setauthsize(tfm, icv_len);
1323 crypto_free_aead(tfm);
1324 return ERR_PTR(ret);
1327 static int init_rx_sa(struct macsec_rx_sa *rx_sa, char *sak, int key_len,
1330 rx_sa->stats = alloc_percpu(struct macsec_rx_sa_stats);
1334 rx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len);
1335 if (IS_ERR(rx_sa->key.tfm)) {
1336 free_percpu(rx_sa->stats);
1337 return PTR_ERR(rx_sa->key.tfm);
1340 rx_sa->ssci = MACSEC_UNDEF_SSCI;
1341 rx_sa->active = false;
1343 refcount_set(&rx_sa->refcnt, 1);
1344 spin_lock_init(&rx_sa->lock);
1349 static void clear_rx_sa(struct macsec_rx_sa *rx_sa)
1351 rx_sa->active = false;
1353 macsec_rxsa_put(rx_sa);
1356 static void free_rx_sc(struct macsec_rx_sc *rx_sc)
1360 for (i = 0; i < MACSEC_NUM_AN; i++) {
1361 struct macsec_rx_sa *sa = rtnl_dereference(rx_sc->sa[i]);
1363 RCU_INIT_POINTER(rx_sc->sa[i], NULL);
1368 macsec_rxsc_put(rx_sc);
1371 static struct macsec_rx_sc *del_rx_sc(struct macsec_secy *secy, sci_t sci)
1373 struct macsec_rx_sc *rx_sc, __rcu **rx_scp;
1375 for (rx_scp = &secy->rx_sc, rx_sc = rtnl_dereference(*rx_scp);
1377 rx_scp = &rx_sc->next, rx_sc = rtnl_dereference(*rx_scp)) {
1378 if (rx_sc->sci == sci) {
1381 rcu_assign_pointer(*rx_scp, rx_sc->next);
1389 static struct macsec_rx_sc *create_rx_sc(struct net_device *dev, sci_t sci,
1392 struct macsec_rx_sc *rx_sc;
1393 struct macsec_dev *macsec;
1394 struct net_device *real_dev = macsec_priv(dev)->real_dev;
1395 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
1396 struct macsec_secy *secy;
1398 list_for_each_entry(macsec, &rxd->secys, secys) {
1399 if (find_rx_sc_rtnl(&macsec->secy, sci))
1400 return ERR_PTR(-EEXIST);
1403 rx_sc = kzalloc(sizeof(*rx_sc), GFP_KERNEL);
1405 return ERR_PTR(-ENOMEM);
1407 rx_sc->stats = netdev_alloc_pcpu_stats(struct pcpu_rx_sc_stats);
1408 if (!rx_sc->stats) {
1410 return ERR_PTR(-ENOMEM);
1414 rx_sc->active = active;
1415 refcount_set(&rx_sc->refcnt, 1);
1417 secy = &macsec_priv(dev)->secy;
1418 rcu_assign_pointer(rx_sc->next, secy->rx_sc);
1419 rcu_assign_pointer(secy->rx_sc, rx_sc);
1427 static int init_tx_sa(struct macsec_tx_sa *tx_sa, char *sak, int key_len,
1430 tx_sa->stats = alloc_percpu(struct macsec_tx_sa_stats);
1434 tx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len);
1435 if (IS_ERR(tx_sa->key.tfm)) {
1436 free_percpu(tx_sa->stats);
1437 return PTR_ERR(tx_sa->key.tfm);
1440 tx_sa->ssci = MACSEC_UNDEF_SSCI;
1441 tx_sa->active = false;
1442 refcount_set(&tx_sa->refcnt, 1);
1443 spin_lock_init(&tx_sa->lock);
1448 static void clear_tx_sa(struct macsec_tx_sa *tx_sa)
1450 tx_sa->active = false;
1452 macsec_txsa_put(tx_sa);
1455 static struct genl_family macsec_fam;
1457 static struct net_device *get_dev_from_nl(struct net *net,
1458 struct nlattr **attrs)
1460 int ifindex = nla_get_u32(attrs[MACSEC_ATTR_IFINDEX]);
1461 struct net_device *dev;
1463 dev = __dev_get_by_index(net, ifindex);
1465 return ERR_PTR(-ENODEV);
1467 if (!netif_is_macsec(dev))
1468 return ERR_PTR(-ENODEV);
1473 static enum macsec_offload nla_get_offload(const struct nlattr *nla)
1475 return (__force enum macsec_offload)nla_get_u8(nla);
1478 static sci_t nla_get_sci(const struct nlattr *nla)
1480 return (__force sci_t)nla_get_u64(nla);
1483 static int nla_put_sci(struct sk_buff *skb, int attrtype, sci_t value,
1486 return nla_put_u64_64bit(skb, attrtype, (__force u64)value, padattr);
1489 static ssci_t nla_get_ssci(const struct nlattr *nla)
1491 return (__force ssci_t)nla_get_u32(nla);
1494 static int nla_put_ssci(struct sk_buff *skb, int attrtype, ssci_t value)
1496 return nla_put_u32(skb, attrtype, (__force u64)value);
1499 static struct macsec_tx_sa *get_txsa_from_nl(struct net *net,
1500 struct nlattr **attrs,
1501 struct nlattr **tb_sa,
1502 struct net_device **devp,
1503 struct macsec_secy **secyp,
1504 struct macsec_tx_sc **scp,
1507 struct net_device *dev;
1508 struct macsec_secy *secy;
1509 struct macsec_tx_sc *tx_sc;
1510 struct macsec_tx_sa *tx_sa;
1512 if (!tb_sa[MACSEC_SA_ATTR_AN])
1513 return ERR_PTR(-EINVAL);
1515 *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1517 dev = get_dev_from_nl(net, attrs);
1519 return ERR_CAST(dev);
1521 if (*assoc_num >= MACSEC_NUM_AN)
1522 return ERR_PTR(-EINVAL);
1524 secy = &macsec_priv(dev)->secy;
1525 tx_sc = &secy->tx_sc;
1527 tx_sa = rtnl_dereference(tx_sc->sa[*assoc_num]);
1529 return ERR_PTR(-ENODEV);
1537 static struct macsec_rx_sc *get_rxsc_from_nl(struct net *net,
1538 struct nlattr **attrs,
1539 struct nlattr **tb_rxsc,
1540 struct net_device **devp,
1541 struct macsec_secy **secyp)
1543 struct net_device *dev;
1544 struct macsec_secy *secy;
1545 struct macsec_rx_sc *rx_sc;
1548 dev = get_dev_from_nl(net, attrs);
1550 return ERR_CAST(dev);
1552 secy = &macsec_priv(dev)->secy;
1554 if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI])
1555 return ERR_PTR(-EINVAL);
1557 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1558 rx_sc = find_rx_sc_rtnl(secy, sci);
1560 return ERR_PTR(-ENODEV);
1568 static struct macsec_rx_sa *get_rxsa_from_nl(struct net *net,
1569 struct nlattr **attrs,
1570 struct nlattr **tb_rxsc,
1571 struct nlattr **tb_sa,
1572 struct net_device **devp,
1573 struct macsec_secy **secyp,
1574 struct macsec_rx_sc **scp,
1577 struct macsec_rx_sc *rx_sc;
1578 struct macsec_rx_sa *rx_sa;
1580 if (!tb_sa[MACSEC_SA_ATTR_AN])
1581 return ERR_PTR(-EINVAL);
1583 *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1584 if (*assoc_num >= MACSEC_NUM_AN)
1585 return ERR_PTR(-EINVAL);
1587 rx_sc = get_rxsc_from_nl(net, attrs, tb_rxsc, devp, secyp);
1589 return ERR_CAST(rx_sc);
1591 rx_sa = rtnl_dereference(rx_sc->sa[*assoc_num]);
1593 return ERR_PTR(-ENODEV);
1599 static const struct nla_policy macsec_genl_policy[NUM_MACSEC_ATTR] = {
1600 [MACSEC_ATTR_IFINDEX] = { .type = NLA_U32 },
1601 [MACSEC_ATTR_RXSC_CONFIG] = { .type = NLA_NESTED },
1602 [MACSEC_ATTR_SA_CONFIG] = { .type = NLA_NESTED },
1603 [MACSEC_ATTR_OFFLOAD] = { .type = NLA_NESTED },
1606 static const struct nla_policy macsec_genl_rxsc_policy[NUM_MACSEC_RXSC_ATTR] = {
1607 [MACSEC_RXSC_ATTR_SCI] = { .type = NLA_U64 },
1608 [MACSEC_RXSC_ATTR_ACTIVE] = { .type = NLA_U8 },
1611 static const struct nla_policy macsec_genl_sa_policy[NUM_MACSEC_SA_ATTR] = {
1612 [MACSEC_SA_ATTR_AN] = { .type = NLA_U8 },
1613 [MACSEC_SA_ATTR_ACTIVE] = { .type = NLA_U8 },
1614 [MACSEC_SA_ATTR_PN] = NLA_POLICY_MIN_LEN(4),
1615 [MACSEC_SA_ATTR_KEYID] = { .type = NLA_BINARY,
1616 .len = MACSEC_KEYID_LEN, },
1617 [MACSEC_SA_ATTR_KEY] = { .type = NLA_BINARY,
1618 .len = MACSEC_MAX_KEY_LEN, },
1619 [MACSEC_SA_ATTR_SSCI] = { .type = NLA_U32 },
1620 [MACSEC_SA_ATTR_SALT] = { .type = NLA_BINARY,
1621 .len = MACSEC_SALT_LEN, },
1624 static const struct nla_policy macsec_genl_offload_policy[NUM_MACSEC_OFFLOAD_ATTR] = {
1625 [MACSEC_OFFLOAD_ATTR_TYPE] = { .type = NLA_U8 },
1628 /* Offloads an operation to a device driver */
1629 static int macsec_offload(int (* const func)(struct macsec_context *),
1630 struct macsec_context *ctx)
1634 if (unlikely(!func))
1637 if (ctx->offload == MACSEC_OFFLOAD_PHY)
1638 mutex_lock(&ctx->phydev->lock);
1640 /* Phase I: prepare. The drive should fail here if there are going to be
1641 * issues in the commit phase.
1643 ctx->prepare = true;
1648 /* Phase II: commit. This step cannot fail. */
1649 ctx->prepare = false;
1651 /* This should never happen: commit is not allowed to fail */
1653 WARN(1, "MACsec offloading commit failed (%d)\n", ret);
1656 if (ctx->offload == MACSEC_OFFLOAD_PHY)
1657 mutex_unlock(&ctx->phydev->lock);
1662 static int parse_sa_config(struct nlattr **attrs, struct nlattr **tb_sa)
1664 if (!attrs[MACSEC_ATTR_SA_CONFIG])
1667 if (nla_parse_nested_deprecated(tb_sa, MACSEC_SA_ATTR_MAX, attrs[MACSEC_ATTR_SA_CONFIG], macsec_genl_sa_policy, NULL))
1673 static int parse_rxsc_config(struct nlattr **attrs, struct nlattr **tb_rxsc)
1675 if (!attrs[MACSEC_ATTR_RXSC_CONFIG])
1678 if (nla_parse_nested_deprecated(tb_rxsc, MACSEC_RXSC_ATTR_MAX, attrs[MACSEC_ATTR_RXSC_CONFIG], macsec_genl_rxsc_policy, NULL))
1684 static bool validate_add_rxsa(struct nlattr **attrs)
1686 if (!attrs[MACSEC_SA_ATTR_AN] ||
1687 !attrs[MACSEC_SA_ATTR_KEY] ||
1688 !attrs[MACSEC_SA_ATTR_KEYID])
1691 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
1694 if (attrs[MACSEC_SA_ATTR_PN] &&
1695 nla_get_u64(attrs[MACSEC_SA_ATTR_PN]) == 0)
1698 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
1699 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
1703 if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN)
1709 static int macsec_add_rxsa(struct sk_buff *skb, struct genl_info *info)
1711 struct net_device *dev;
1712 struct nlattr **attrs = info->attrs;
1713 struct macsec_secy *secy;
1714 struct macsec_rx_sc *rx_sc;
1715 struct macsec_rx_sa *rx_sa;
1716 unsigned char assoc_num;
1718 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1719 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1722 if (!attrs[MACSEC_ATTR_IFINDEX])
1725 if (parse_sa_config(attrs, tb_sa))
1728 if (parse_rxsc_config(attrs, tb_rxsc))
1731 if (!validate_add_rxsa(tb_sa))
1735 rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy);
1736 if (IS_ERR(rx_sc)) {
1738 return PTR_ERR(rx_sc);
1741 assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1743 if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) {
1744 pr_notice("macsec: nl: add_rxsa: bad key length: %d != %d\n",
1745 nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len);
1750 pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
1751 if (tb_sa[MACSEC_SA_ATTR_PN] &&
1752 nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
1753 pr_notice("macsec: nl: add_rxsa: bad pn length: %d != %d\n",
1754 nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
1760 if (!tb_sa[MACSEC_SA_ATTR_SSCI] || !tb_sa[MACSEC_SA_ATTR_SALT]) {
1765 if (nla_len(tb_sa[MACSEC_SA_ATTR_SALT]) != MACSEC_SALT_LEN) {
1766 pr_notice("macsec: nl: add_rxsa: bad salt length: %d != %d\n",
1767 nla_len(tb_sa[MACSEC_SA_ATTR_SALT]),
1774 rx_sa = rtnl_dereference(rx_sc->sa[assoc_num]);
1780 rx_sa = kmalloc(sizeof(*rx_sa), GFP_KERNEL);
1786 err = init_rx_sa(rx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
1787 secy->key_len, secy->icv_len);
1794 if (tb_sa[MACSEC_SA_ATTR_PN]) {
1795 spin_lock_bh(&rx_sa->lock);
1796 rx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
1797 spin_unlock_bh(&rx_sa->lock);
1800 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
1801 rx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
1805 /* If h/w offloading is available, propagate to the device */
1806 if (macsec_is_offloaded(netdev_priv(dev))) {
1807 const struct macsec_ops *ops;
1808 struct macsec_context ctx;
1810 ops = macsec_get_ops(netdev_priv(dev), &ctx);
1816 ctx.sa.assoc_num = assoc_num;
1817 ctx.sa.rx_sa = rx_sa;
1819 memcpy(ctx.sa.key, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
1822 err = macsec_offload(ops->mdo_add_rxsa, &ctx);
1823 memzero_explicit(ctx.sa.key, secy->key_len);
1829 rx_sa->ssci = nla_get_ssci(tb_sa[MACSEC_SA_ATTR_SSCI]);
1830 nla_memcpy(rx_sa->key.salt.bytes, tb_sa[MACSEC_SA_ATTR_SALT],
1834 nla_memcpy(rx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN);
1835 rcu_assign_pointer(rx_sc->sa[assoc_num], rx_sa);
1842 macsec_rxsa_put(rx_sa);
1847 static bool validate_add_rxsc(struct nlattr **attrs)
1849 if (!attrs[MACSEC_RXSC_ATTR_SCI])
1852 if (attrs[MACSEC_RXSC_ATTR_ACTIVE]) {
1853 if (nla_get_u8(attrs[MACSEC_RXSC_ATTR_ACTIVE]) > 1)
1860 static int macsec_add_rxsc(struct sk_buff *skb, struct genl_info *info)
1862 struct net_device *dev;
1863 sci_t sci = MACSEC_UNDEF_SCI;
1864 struct nlattr **attrs = info->attrs;
1865 struct macsec_rx_sc *rx_sc;
1866 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1867 struct macsec_secy *secy;
1871 if (!attrs[MACSEC_ATTR_IFINDEX])
1874 if (parse_rxsc_config(attrs, tb_rxsc))
1877 if (!validate_add_rxsc(tb_rxsc))
1881 dev = get_dev_from_nl(genl_info_net(info), attrs);
1884 return PTR_ERR(dev);
1887 secy = &macsec_priv(dev)->secy;
1888 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1890 if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE])
1891 active = nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]);
1893 rx_sc = create_rx_sc(dev, sci, active);
1894 if (IS_ERR(rx_sc)) {
1896 return PTR_ERR(rx_sc);
1899 if (macsec_is_offloaded(netdev_priv(dev))) {
1900 const struct macsec_ops *ops;
1901 struct macsec_context ctx;
1903 ops = macsec_get_ops(netdev_priv(dev), &ctx);
1912 ret = macsec_offload(ops->mdo_add_rxsc, &ctx);
1922 del_rx_sc(secy, sci);
1928 static bool validate_add_txsa(struct nlattr **attrs)
1930 if (!attrs[MACSEC_SA_ATTR_AN] ||
1931 !attrs[MACSEC_SA_ATTR_PN] ||
1932 !attrs[MACSEC_SA_ATTR_KEY] ||
1933 !attrs[MACSEC_SA_ATTR_KEYID])
1936 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
1939 if (nla_get_u64(attrs[MACSEC_SA_ATTR_PN]) == 0)
1942 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
1943 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
1947 if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN)
1953 static int macsec_add_txsa(struct sk_buff *skb, struct genl_info *info)
1955 struct net_device *dev;
1956 struct nlattr **attrs = info->attrs;
1957 struct macsec_secy *secy;
1958 struct macsec_tx_sc *tx_sc;
1959 struct macsec_tx_sa *tx_sa;
1960 unsigned char assoc_num;
1962 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1963 bool was_operational;
1966 if (!attrs[MACSEC_ATTR_IFINDEX])
1969 if (parse_sa_config(attrs, tb_sa))
1972 if (!validate_add_txsa(tb_sa))
1976 dev = get_dev_from_nl(genl_info_net(info), attrs);
1979 return PTR_ERR(dev);
1982 secy = &macsec_priv(dev)->secy;
1983 tx_sc = &secy->tx_sc;
1985 assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1987 if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) {
1988 pr_notice("macsec: nl: add_txsa: bad key length: %d != %d\n",
1989 nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len);
1994 pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
1995 if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
1996 pr_notice("macsec: nl: add_txsa: bad pn length: %d != %d\n",
1997 nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
2003 if (!tb_sa[MACSEC_SA_ATTR_SSCI] || !tb_sa[MACSEC_SA_ATTR_SALT]) {
2008 if (nla_len(tb_sa[MACSEC_SA_ATTR_SALT]) != MACSEC_SALT_LEN) {
2009 pr_notice("macsec: nl: add_txsa: bad salt length: %d != %d\n",
2010 nla_len(tb_sa[MACSEC_SA_ATTR_SALT]),
2017 tx_sa = rtnl_dereference(tx_sc->sa[assoc_num]);
2023 tx_sa = kmalloc(sizeof(*tx_sa), GFP_KERNEL);
2029 err = init_tx_sa(tx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
2030 secy->key_len, secy->icv_len);
2037 spin_lock_bh(&tx_sa->lock);
2038 tx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
2039 spin_unlock_bh(&tx_sa->lock);
2041 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2042 tx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2044 was_operational = secy->operational;
2045 if (assoc_num == tx_sc->encoding_sa && tx_sa->active)
2046 secy->operational = true;
2048 /* If h/w offloading is available, propagate to the device */
2049 if (macsec_is_offloaded(netdev_priv(dev))) {
2050 const struct macsec_ops *ops;
2051 struct macsec_context ctx;
2053 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2059 ctx.sa.assoc_num = assoc_num;
2060 ctx.sa.tx_sa = tx_sa;
2062 memcpy(ctx.sa.key, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
2065 err = macsec_offload(ops->mdo_add_txsa, &ctx);
2066 memzero_explicit(ctx.sa.key, secy->key_len);
2072 tx_sa->ssci = nla_get_ssci(tb_sa[MACSEC_SA_ATTR_SSCI]);
2073 nla_memcpy(tx_sa->key.salt.bytes, tb_sa[MACSEC_SA_ATTR_SALT],
2077 nla_memcpy(tx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN);
2078 rcu_assign_pointer(tx_sc->sa[assoc_num], tx_sa);
2085 secy->operational = was_operational;
2086 macsec_txsa_put(tx_sa);
2091 static int macsec_del_rxsa(struct sk_buff *skb, struct genl_info *info)
2093 struct nlattr **attrs = info->attrs;
2094 struct net_device *dev;
2095 struct macsec_secy *secy;
2096 struct macsec_rx_sc *rx_sc;
2097 struct macsec_rx_sa *rx_sa;
2099 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2100 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2103 if (!attrs[MACSEC_ATTR_IFINDEX])
2106 if (parse_sa_config(attrs, tb_sa))
2109 if (parse_rxsc_config(attrs, tb_rxsc))
2113 rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa,
2114 &dev, &secy, &rx_sc, &assoc_num);
2115 if (IS_ERR(rx_sa)) {
2117 return PTR_ERR(rx_sa);
2120 if (rx_sa->active) {
2125 /* If h/w offloading is available, propagate to the device */
2126 if (macsec_is_offloaded(netdev_priv(dev))) {
2127 const struct macsec_ops *ops;
2128 struct macsec_context ctx;
2130 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2136 ctx.sa.assoc_num = assoc_num;
2137 ctx.sa.rx_sa = rx_sa;
2140 ret = macsec_offload(ops->mdo_del_rxsa, &ctx);
2145 RCU_INIT_POINTER(rx_sc->sa[assoc_num], NULL);
2157 static int macsec_del_rxsc(struct sk_buff *skb, struct genl_info *info)
2159 struct nlattr **attrs = info->attrs;
2160 struct net_device *dev;
2161 struct macsec_secy *secy;
2162 struct macsec_rx_sc *rx_sc;
2164 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2167 if (!attrs[MACSEC_ATTR_IFINDEX])
2170 if (parse_rxsc_config(attrs, tb_rxsc))
2173 if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI])
2177 dev = get_dev_from_nl(genl_info_net(info), info->attrs);
2180 return PTR_ERR(dev);
2183 secy = &macsec_priv(dev)->secy;
2184 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
2186 rx_sc = del_rx_sc(secy, sci);
2192 /* If h/w offloading is available, propagate to the device */
2193 if (macsec_is_offloaded(netdev_priv(dev))) {
2194 const struct macsec_ops *ops;
2195 struct macsec_context ctx;
2197 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2205 ret = macsec_offload(ops->mdo_del_rxsc, &ctx);
2220 static int macsec_del_txsa(struct sk_buff *skb, struct genl_info *info)
2222 struct nlattr **attrs = info->attrs;
2223 struct net_device *dev;
2224 struct macsec_secy *secy;
2225 struct macsec_tx_sc *tx_sc;
2226 struct macsec_tx_sa *tx_sa;
2228 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2231 if (!attrs[MACSEC_ATTR_IFINDEX])
2234 if (parse_sa_config(attrs, tb_sa))
2238 tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa,
2239 &dev, &secy, &tx_sc, &assoc_num);
2240 if (IS_ERR(tx_sa)) {
2242 return PTR_ERR(tx_sa);
2245 if (tx_sa->active) {
2250 /* If h/w offloading is available, propagate to the device */
2251 if (macsec_is_offloaded(netdev_priv(dev))) {
2252 const struct macsec_ops *ops;
2253 struct macsec_context ctx;
2255 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2261 ctx.sa.assoc_num = assoc_num;
2262 ctx.sa.tx_sa = tx_sa;
2265 ret = macsec_offload(ops->mdo_del_txsa, &ctx);
2270 RCU_INIT_POINTER(tx_sc->sa[assoc_num], NULL);
2282 static bool validate_upd_sa(struct nlattr **attrs)
2284 if (!attrs[MACSEC_SA_ATTR_AN] ||
2285 attrs[MACSEC_SA_ATTR_KEY] ||
2286 attrs[MACSEC_SA_ATTR_KEYID] ||
2287 attrs[MACSEC_SA_ATTR_SSCI] ||
2288 attrs[MACSEC_SA_ATTR_SALT])
2291 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
2294 if (attrs[MACSEC_SA_ATTR_PN] && nla_get_u64(attrs[MACSEC_SA_ATTR_PN]) == 0)
2297 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
2298 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
2305 static int macsec_upd_txsa(struct sk_buff *skb, struct genl_info *info)
2307 struct nlattr **attrs = info->attrs;
2308 struct net_device *dev;
2309 struct macsec_secy *secy;
2310 struct macsec_tx_sc *tx_sc;
2311 struct macsec_tx_sa *tx_sa;
2313 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2314 bool was_operational, was_active;
2320 if (!attrs[MACSEC_ATTR_IFINDEX])
2323 if (parse_sa_config(attrs, tb_sa))
2326 if (!validate_upd_sa(tb_sa))
2330 tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa,
2331 &dev, &secy, &tx_sc, &assoc_num);
2332 if (IS_ERR(tx_sa)) {
2334 return PTR_ERR(tx_sa);
2337 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2340 pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
2341 if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
2342 pr_notice("macsec: nl: upd_txsa: bad pn length: %d != %d\n",
2343 nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
2348 spin_lock_bh(&tx_sa->lock);
2349 prev_pn = tx_sa->next_pn_halves;
2350 tx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
2351 spin_unlock_bh(&tx_sa->lock);
2354 was_active = tx_sa->active;
2355 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2356 tx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2358 was_operational = secy->operational;
2359 if (assoc_num == tx_sc->encoding_sa)
2360 secy->operational = tx_sa->active;
2362 /* If h/w offloading is available, propagate to the device */
2363 if (macsec_is_offloaded(netdev_priv(dev))) {
2364 const struct macsec_ops *ops;
2365 struct macsec_context ctx;
2367 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2373 ctx.sa.assoc_num = assoc_num;
2374 ctx.sa.tx_sa = tx_sa;
2377 ret = macsec_offload(ops->mdo_upd_txsa, &ctx);
2387 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2388 spin_lock_bh(&tx_sa->lock);
2389 tx_sa->next_pn_halves = prev_pn;
2390 spin_unlock_bh(&tx_sa->lock);
2392 tx_sa->active = was_active;
2393 secy->operational = was_operational;
2398 static int macsec_upd_rxsa(struct sk_buff *skb, struct genl_info *info)
2400 struct nlattr **attrs = info->attrs;
2401 struct net_device *dev;
2402 struct macsec_secy *secy;
2403 struct macsec_rx_sc *rx_sc;
2404 struct macsec_rx_sa *rx_sa;
2406 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2407 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2414 if (!attrs[MACSEC_ATTR_IFINDEX])
2417 if (parse_rxsc_config(attrs, tb_rxsc))
2420 if (parse_sa_config(attrs, tb_sa))
2423 if (!validate_upd_sa(tb_sa))
2427 rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa,
2428 &dev, &secy, &rx_sc, &assoc_num);
2429 if (IS_ERR(rx_sa)) {
2431 return PTR_ERR(rx_sa);
2434 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2437 pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
2438 if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
2439 pr_notice("macsec: nl: upd_rxsa: bad pn length: %d != %d\n",
2440 nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
2445 spin_lock_bh(&rx_sa->lock);
2446 prev_pn = rx_sa->next_pn_halves;
2447 rx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
2448 spin_unlock_bh(&rx_sa->lock);
2451 was_active = rx_sa->active;
2452 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2453 rx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2455 /* If h/w offloading is available, propagate to the device */
2456 if (macsec_is_offloaded(netdev_priv(dev))) {
2457 const struct macsec_ops *ops;
2458 struct macsec_context ctx;
2460 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2466 ctx.sa.assoc_num = assoc_num;
2467 ctx.sa.rx_sa = rx_sa;
2470 ret = macsec_offload(ops->mdo_upd_rxsa, &ctx);
2479 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2480 spin_lock_bh(&rx_sa->lock);
2481 rx_sa->next_pn_halves = prev_pn;
2482 spin_unlock_bh(&rx_sa->lock);
2484 rx_sa->active = was_active;
2489 static int macsec_upd_rxsc(struct sk_buff *skb, struct genl_info *info)
2491 struct nlattr **attrs = info->attrs;
2492 struct net_device *dev;
2493 struct macsec_secy *secy;
2494 struct macsec_rx_sc *rx_sc;
2495 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2496 unsigned int prev_n_rx_sc;
2500 if (!attrs[MACSEC_ATTR_IFINDEX])
2503 if (parse_rxsc_config(attrs, tb_rxsc))
2506 if (!validate_add_rxsc(tb_rxsc))
2510 rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy);
2511 if (IS_ERR(rx_sc)) {
2513 return PTR_ERR(rx_sc);
2516 was_active = rx_sc->active;
2517 prev_n_rx_sc = secy->n_rx_sc;
2518 if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]) {
2519 bool new = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]);
2521 if (rx_sc->active != new)
2522 secy->n_rx_sc += new ? 1 : -1;
2524 rx_sc->active = new;
2527 /* If h/w offloading is available, propagate to the device */
2528 if (macsec_is_offloaded(netdev_priv(dev))) {
2529 const struct macsec_ops *ops;
2530 struct macsec_context ctx;
2532 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2541 ret = macsec_offload(ops->mdo_upd_rxsc, &ctx);
2551 secy->n_rx_sc = prev_n_rx_sc;
2552 rx_sc->active = was_active;
2557 static bool macsec_is_configured(struct macsec_dev *macsec)
2559 struct macsec_secy *secy = &macsec->secy;
2560 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
2566 for (i = 0; i < MACSEC_NUM_AN; i++)
2573 static int macsec_upd_offload(struct sk_buff *skb, struct genl_info *info)
2575 struct nlattr *tb_offload[MACSEC_OFFLOAD_ATTR_MAX + 1];
2576 enum macsec_offload offload, prev_offload;
2577 int (*func)(struct macsec_context *ctx);
2578 struct nlattr **attrs = info->attrs;
2579 struct net_device *dev;
2580 const struct macsec_ops *ops;
2581 struct macsec_context ctx;
2582 struct macsec_dev *macsec;
2585 if (!attrs[MACSEC_ATTR_IFINDEX])
2588 if (!attrs[MACSEC_ATTR_OFFLOAD])
2591 if (nla_parse_nested_deprecated(tb_offload, MACSEC_OFFLOAD_ATTR_MAX,
2592 attrs[MACSEC_ATTR_OFFLOAD],
2593 macsec_genl_offload_policy, NULL))
2598 dev = get_dev_from_nl(genl_info_net(info), attrs);
2603 macsec = macsec_priv(dev);
2605 if (!tb_offload[MACSEC_OFFLOAD_ATTR_TYPE]) {
2610 offload = nla_get_u8(tb_offload[MACSEC_OFFLOAD_ATTR_TYPE]);
2611 if (macsec->offload == offload)
2614 /* Check if the offloading mode is supported by the underlying layers */
2615 if (offload != MACSEC_OFFLOAD_OFF &&
2616 !macsec_check_offload(offload, macsec)) {
2621 /* Check if the net device is busy. */
2622 if (netif_running(dev)) {
2627 prev_offload = macsec->offload;
2628 macsec->offload = offload;
2630 /* Check if the device already has rules configured: we do not support
2633 if (macsec_is_configured(macsec)) {
2638 ops = __macsec_get_ops(offload == MACSEC_OFFLOAD_OFF ? prev_offload : offload,
2645 if (prev_offload == MACSEC_OFFLOAD_OFF)
2646 func = ops->mdo_add_secy;
2648 func = ops->mdo_del_secy;
2650 ctx.secy = &macsec->secy;
2651 ret = macsec_offload(func, &ctx);
2659 macsec->offload = prev_offload;
2665 static void get_tx_sa_stats(struct net_device *dev, int an,
2666 struct macsec_tx_sa *tx_sa,
2667 struct macsec_tx_sa_stats *sum)
2669 struct macsec_dev *macsec = macsec_priv(dev);
2672 /* If h/w offloading is available, propagate to the device */
2673 if (macsec_is_offloaded(macsec)) {
2674 const struct macsec_ops *ops;
2675 struct macsec_context ctx;
2677 ops = macsec_get_ops(macsec, &ctx);
2679 ctx.sa.assoc_num = an;
2680 ctx.sa.tx_sa = tx_sa;
2681 ctx.stats.tx_sa_stats = sum;
2682 ctx.secy = &macsec_priv(dev)->secy;
2683 macsec_offload(ops->mdo_get_tx_sa_stats, &ctx);
2688 for_each_possible_cpu(cpu) {
2689 const struct macsec_tx_sa_stats *stats =
2690 per_cpu_ptr(tx_sa->stats, cpu);
2692 sum->OutPktsProtected += stats->OutPktsProtected;
2693 sum->OutPktsEncrypted += stats->OutPktsEncrypted;
2697 static int copy_tx_sa_stats(struct sk_buff *skb, struct macsec_tx_sa_stats *sum)
2699 if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_PROTECTED,
2700 sum->OutPktsProtected) ||
2701 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_ENCRYPTED,
2702 sum->OutPktsEncrypted))
2708 static void get_rx_sa_stats(struct net_device *dev,
2709 struct macsec_rx_sc *rx_sc, int an,
2710 struct macsec_rx_sa *rx_sa,
2711 struct macsec_rx_sa_stats *sum)
2713 struct macsec_dev *macsec = macsec_priv(dev);
2716 /* If h/w offloading is available, propagate to the device */
2717 if (macsec_is_offloaded(macsec)) {
2718 const struct macsec_ops *ops;
2719 struct macsec_context ctx;
2721 ops = macsec_get_ops(macsec, &ctx);
2723 ctx.sa.assoc_num = an;
2724 ctx.sa.rx_sa = rx_sa;
2725 ctx.stats.rx_sa_stats = sum;
2726 ctx.secy = &macsec_priv(dev)->secy;
2728 macsec_offload(ops->mdo_get_rx_sa_stats, &ctx);
2733 for_each_possible_cpu(cpu) {
2734 const struct macsec_rx_sa_stats *stats =
2735 per_cpu_ptr(rx_sa->stats, cpu);
2737 sum->InPktsOK += stats->InPktsOK;
2738 sum->InPktsInvalid += stats->InPktsInvalid;
2739 sum->InPktsNotValid += stats->InPktsNotValid;
2740 sum->InPktsNotUsingSA += stats->InPktsNotUsingSA;
2741 sum->InPktsUnusedSA += stats->InPktsUnusedSA;
2745 static int copy_rx_sa_stats(struct sk_buff *skb,
2746 struct macsec_rx_sa_stats *sum)
2748 if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_OK, sum->InPktsOK) ||
2749 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_INVALID,
2750 sum->InPktsInvalid) ||
2751 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_VALID,
2752 sum->InPktsNotValid) ||
2753 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_USING_SA,
2754 sum->InPktsNotUsingSA) ||
2755 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_UNUSED_SA,
2756 sum->InPktsUnusedSA))
2762 static void get_rx_sc_stats(struct net_device *dev,
2763 struct macsec_rx_sc *rx_sc,
2764 struct macsec_rx_sc_stats *sum)
2766 struct macsec_dev *macsec = macsec_priv(dev);
2769 /* If h/w offloading is available, propagate to the device */
2770 if (macsec_is_offloaded(macsec)) {
2771 const struct macsec_ops *ops;
2772 struct macsec_context ctx;
2774 ops = macsec_get_ops(macsec, &ctx);
2776 ctx.stats.rx_sc_stats = sum;
2777 ctx.secy = &macsec_priv(dev)->secy;
2779 macsec_offload(ops->mdo_get_rx_sc_stats, &ctx);
2784 for_each_possible_cpu(cpu) {
2785 const struct pcpu_rx_sc_stats *stats;
2786 struct macsec_rx_sc_stats tmp;
2789 stats = per_cpu_ptr(rx_sc->stats, cpu);
2791 start = u64_stats_fetch_begin_irq(&stats->syncp);
2792 memcpy(&tmp, &stats->stats, sizeof(tmp));
2793 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2795 sum->InOctetsValidated += tmp.InOctetsValidated;
2796 sum->InOctetsDecrypted += tmp.InOctetsDecrypted;
2797 sum->InPktsUnchecked += tmp.InPktsUnchecked;
2798 sum->InPktsDelayed += tmp.InPktsDelayed;
2799 sum->InPktsOK += tmp.InPktsOK;
2800 sum->InPktsInvalid += tmp.InPktsInvalid;
2801 sum->InPktsLate += tmp.InPktsLate;
2802 sum->InPktsNotValid += tmp.InPktsNotValid;
2803 sum->InPktsNotUsingSA += tmp.InPktsNotUsingSA;
2804 sum->InPktsUnusedSA += tmp.InPktsUnusedSA;
2808 static int copy_rx_sc_stats(struct sk_buff *skb, struct macsec_rx_sc_stats *sum)
2810 if (nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_VALIDATED,
2811 sum->InOctetsValidated,
2812 MACSEC_RXSC_STATS_ATTR_PAD) ||
2813 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_DECRYPTED,
2814 sum->InOctetsDecrypted,
2815 MACSEC_RXSC_STATS_ATTR_PAD) ||
2816 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNCHECKED,
2817 sum->InPktsUnchecked,
2818 MACSEC_RXSC_STATS_ATTR_PAD) ||
2819 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_DELAYED,
2821 MACSEC_RXSC_STATS_ATTR_PAD) ||
2822 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_OK,
2824 MACSEC_RXSC_STATS_ATTR_PAD) ||
2825 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_INVALID,
2827 MACSEC_RXSC_STATS_ATTR_PAD) ||
2828 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_LATE,
2830 MACSEC_RXSC_STATS_ATTR_PAD) ||
2831 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_VALID,
2832 sum->InPktsNotValid,
2833 MACSEC_RXSC_STATS_ATTR_PAD) ||
2834 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_USING_SA,
2835 sum->InPktsNotUsingSA,
2836 MACSEC_RXSC_STATS_ATTR_PAD) ||
2837 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNUSED_SA,
2838 sum->InPktsUnusedSA,
2839 MACSEC_RXSC_STATS_ATTR_PAD))
2845 static void get_tx_sc_stats(struct net_device *dev,
2846 struct macsec_tx_sc_stats *sum)
2848 struct macsec_dev *macsec = macsec_priv(dev);
2851 /* If h/w offloading is available, propagate to the device */
2852 if (macsec_is_offloaded(macsec)) {
2853 const struct macsec_ops *ops;
2854 struct macsec_context ctx;
2856 ops = macsec_get_ops(macsec, &ctx);
2858 ctx.stats.tx_sc_stats = sum;
2859 ctx.secy = &macsec_priv(dev)->secy;
2860 macsec_offload(ops->mdo_get_tx_sc_stats, &ctx);
2865 for_each_possible_cpu(cpu) {
2866 const struct pcpu_tx_sc_stats *stats;
2867 struct macsec_tx_sc_stats tmp;
2870 stats = per_cpu_ptr(macsec_priv(dev)->secy.tx_sc.stats, cpu);
2872 start = u64_stats_fetch_begin_irq(&stats->syncp);
2873 memcpy(&tmp, &stats->stats, sizeof(tmp));
2874 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2876 sum->OutPktsProtected += tmp.OutPktsProtected;
2877 sum->OutPktsEncrypted += tmp.OutPktsEncrypted;
2878 sum->OutOctetsProtected += tmp.OutOctetsProtected;
2879 sum->OutOctetsEncrypted += tmp.OutOctetsEncrypted;
2883 static int copy_tx_sc_stats(struct sk_buff *skb, struct macsec_tx_sc_stats *sum)
2885 if (nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_PROTECTED,
2886 sum->OutPktsProtected,
2887 MACSEC_TXSC_STATS_ATTR_PAD) ||
2888 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_ENCRYPTED,
2889 sum->OutPktsEncrypted,
2890 MACSEC_TXSC_STATS_ATTR_PAD) ||
2891 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_PROTECTED,
2892 sum->OutOctetsProtected,
2893 MACSEC_TXSC_STATS_ATTR_PAD) ||
2894 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_ENCRYPTED,
2895 sum->OutOctetsEncrypted,
2896 MACSEC_TXSC_STATS_ATTR_PAD))
2902 static void get_secy_stats(struct net_device *dev, struct macsec_dev_stats *sum)
2904 struct macsec_dev *macsec = macsec_priv(dev);
2907 /* If h/w offloading is available, propagate to the device */
2908 if (macsec_is_offloaded(macsec)) {
2909 const struct macsec_ops *ops;
2910 struct macsec_context ctx;
2912 ops = macsec_get_ops(macsec, &ctx);
2914 ctx.stats.dev_stats = sum;
2915 ctx.secy = &macsec_priv(dev)->secy;
2916 macsec_offload(ops->mdo_get_dev_stats, &ctx);
2921 for_each_possible_cpu(cpu) {
2922 const struct pcpu_secy_stats *stats;
2923 struct macsec_dev_stats tmp;
2926 stats = per_cpu_ptr(macsec_priv(dev)->stats, cpu);
2928 start = u64_stats_fetch_begin_irq(&stats->syncp);
2929 memcpy(&tmp, &stats->stats, sizeof(tmp));
2930 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2932 sum->OutPktsUntagged += tmp.OutPktsUntagged;
2933 sum->InPktsUntagged += tmp.InPktsUntagged;
2934 sum->OutPktsTooLong += tmp.OutPktsTooLong;
2935 sum->InPktsNoTag += tmp.InPktsNoTag;
2936 sum->InPktsBadTag += tmp.InPktsBadTag;
2937 sum->InPktsUnknownSCI += tmp.InPktsUnknownSCI;
2938 sum->InPktsNoSCI += tmp.InPktsNoSCI;
2939 sum->InPktsOverrun += tmp.InPktsOverrun;
2943 static int copy_secy_stats(struct sk_buff *skb, struct macsec_dev_stats *sum)
2945 if (nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_UNTAGGED,
2946 sum->OutPktsUntagged,
2947 MACSEC_SECY_STATS_ATTR_PAD) ||
2948 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNTAGGED,
2949 sum->InPktsUntagged,
2950 MACSEC_SECY_STATS_ATTR_PAD) ||
2951 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_TOO_LONG,
2952 sum->OutPktsTooLong,
2953 MACSEC_SECY_STATS_ATTR_PAD) ||
2954 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_TAG,
2956 MACSEC_SECY_STATS_ATTR_PAD) ||
2957 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_BAD_TAG,
2959 MACSEC_SECY_STATS_ATTR_PAD) ||
2960 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNKNOWN_SCI,
2961 sum->InPktsUnknownSCI,
2962 MACSEC_SECY_STATS_ATTR_PAD) ||
2963 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_SCI,
2965 MACSEC_SECY_STATS_ATTR_PAD) ||
2966 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_OVERRUN,
2968 MACSEC_SECY_STATS_ATTR_PAD))
2974 static int nla_put_secy(struct macsec_secy *secy, struct sk_buff *skb)
2976 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
2977 struct nlattr *secy_nest = nla_nest_start_noflag(skb,
2984 switch (secy->key_len) {
2985 case MACSEC_GCM_AES_128_SAK_LEN:
2986 csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_128 : MACSEC_DEFAULT_CIPHER_ID;
2988 case MACSEC_GCM_AES_256_SAK_LEN:
2989 csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_256 : MACSEC_CIPHER_ID_GCM_AES_256;
2995 if (nla_put_sci(skb, MACSEC_SECY_ATTR_SCI, secy->sci,
2996 MACSEC_SECY_ATTR_PAD) ||
2997 nla_put_u64_64bit(skb, MACSEC_SECY_ATTR_CIPHER_SUITE,
2998 csid, MACSEC_SECY_ATTR_PAD) ||
2999 nla_put_u8(skb, MACSEC_SECY_ATTR_ICV_LEN, secy->icv_len) ||
3000 nla_put_u8(skb, MACSEC_SECY_ATTR_OPER, secy->operational) ||
3001 nla_put_u8(skb, MACSEC_SECY_ATTR_PROTECT, secy->protect_frames) ||
3002 nla_put_u8(skb, MACSEC_SECY_ATTR_REPLAY, secy->replay_protect) ||
3003 nla_put_u8(skb, MACSEC_SECY_ATTR_VALIDATE, secy->validate_frames) ||
3004 nla_put_u8(skb, MACSEC_SECY_ATTR_ENCRYPT, tx_sc->encrypt) ||
3005 nla_put_u8(skb, MACSEC_SECY_ATTR_INC_SCI, tx_sc->send_sci) ||
3006 nla_put_u8(skb, MACSEC_SECY_ATTR_ES, tx_sc->end_station) ||
3007 nla_put_u8(skb, MACSEC_SECY_ATTR_SCB, tx_sc->scb) ||
3008 nla_put_u8(skb, MACSEC_SECY_ATTR_ENCODING_SA, tx_sc->encoding_sa))
3011 if (secy->replay_protect) {
3012 if (nla_put_u32(skb, MACSEC_SECY_ATTR_WINDOW, secy->replay_window))
3016 nla_nest_end(skb, secy_nest);
3020 nla_nest_cancel(skb, secy_nest);
3024 static noinline_for_stack int
3025 dump_secy(struct macsec_secy *secy, struct net_device *dev,
3026 struct sk_buff *skb, struct netlink_callback *cb)
3028 struct macsec_tx_sc_stats tx_sc_stats = {0, };
3029 struct macsec_tx_sa_stats tx_sa_stats = {0, };
3030 struct macsec_rx_sc_stats rx_sc_stats = {0, };
3031 struct macsec_rx_sa_stats rx_sa_stats = {0, };
3032 struct macsec_dev *macsec = netdev_priv(dev);
3033 struct macsec_dev_stats dev_stats = {0, };
3034 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
3035 struct nlattr *txsa_list, *rxsc_list;
3036 struct macsec_rx_sc *rx_sc;
3037 struct nlattr *attr;
3041 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
3042 &macsec_fam, NLM_F_MULTI, MACSEC_CMD_GET_TXSC);
3046 genl_dump_check_consistent(cb, hdr);
3048 if (nla_put_u32(skb, MACSEC_ATTR_IFINDEX, dev->ifindex))
3049 goto nla_put_failure;
3051 attr = nla_nest_start_noflag(skb, MACSEC_ATTR_OFFLOAD);
3053 goto nla_put_failure;
3054 if (nla_put_u8(skb, MACSEC_OFFLOAD_ATTR_TYPE, macsec->offload))
3055 goto nla_put_failure;
3056 nla_nest_end(skb, attr);
3058 if (nla_put_secy(secy, skb))
3059 goto nla_put_failure;
3061 attr = nla_nest_start_noflag(skb, MACSEC_ATTR_TXSC_STATS);
3063 goto nla_put_failure;
3065 get_tx_sc_stats(dev, &tx_sc_stats);
3066 if (copy_tx_sc_stats(skb, &tx_sc_stats)) {
3067 nla_nest_cancel(skb, attr);
3068 goto nla_put_failure;
3070 nla_nest_end(skb, attr);
3072 attr = nla_nest_start_noflag(skb, MACSEC_ATTR_SECY_STATS);
3074 goto nla_put_failure;
3075 get_secy_stats(dev, &dev_stats);
3076 if (copy_secy_stats(skb, &dev_stats)) {
3077 nla_nest_cancel(skb, attr);
3078 goto nla_put_failure;
3080 nla_nest_end(skb, attr);
3082 txsa_list = nla_nest_start_noflag(skb, MACSEC_ATTR_TXSA_LIST);
3084 goto nla_put_failure;
3085 for (i = 0, j = 1; i < MACSEC_NUM_AN; i++) {
3086 struct macsec_tx_sa *tx_sa = rtnl_dereference(tx_sc->sa[i]);
3087 struct nlattr *txsa_nest;
3094 txsa_nest = nla_nest_start_noflag(skb, j++);
3096 nla_nest_cancel(skb, txsa_list);
3097 goto nla_put_failure;
3100 attr = nla_nest_start_noflag(skb, MACSEC_SA_ATTR_STATS);
3102 nla_nest_cancel(skb, txsa_nest);
3103 nla_nest_cancel(skb, txsa_list);
3104 goto nla_put_failure;
3106 memset(&tx_sa_stats, 0, sizeof(tx_sa_stats));
3107 get_tx_sa_stats(dev, i, tx_sa, &tx_sa_stats);
3108 if (copy_tx_sa_stats(skb, &tx_sa_stats)) {
3109 nla_nest_cancel(skb, attr);
3110 nla_nest_cancel(skb, txsa_nest);
3111 nla_nest_cancel(skb, txsa_list);
3112 goto nla_put_failure;
3114 nla_nest_end(skb, attr);
3117 pn = tx_sa->next_pn;
3118 pn_len = MACSEC_XPN_PN_LEN;
3120 pn = tx_sa->next_pn_halves.lower;
3121 pn_len = MACSEC_DEFAULT_PN_LEN;
3124 if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) ||
3125 nla_put(skb, MACSEC_SA_ATTR_PN, pn_len, &pn) ||
3126 nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, tx_sa->key.id) ||
3127 (secy->xpn && nla_put_ssci(skb, MACSEC_SA_ATTR_SSCI, tx_sa->ssci)) ||
3128 nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, tx_sa->active)) {
3129 nla_nest_cancel(skb, txsa_nest);
3130 nla_nest_cancel(skb, txsa_list);
3131 goto nla_put_failure;
3134 nla_nest_end(skb, txsa_nest);
3136 nla_nest_end(skb, txsa_list);
3138 rxsc_list = nla_nest_start_noflag(skb, MACSEC_ATTR_RXSC_LIST);
3140 goto nla_put_failure;
3143 for_each_rxsc_rtnl(secy, rx_sc) {
3145 struct nlattr *rxsa_list;
3146 struct nlattr *rxsc_nest = nla_nest_start_noflag(skb, j++);
3149 nla_nest_cancel(skb, rxsc_list);
3150 goto nla_put_failure;
3153 if (nla_put_u8(skb, MACSEC_RXSC_ATTR_ACTIVE, rx_sc->active) ||
3154 nla_put_sci(skb, MACSEC_RXSC_ATTR_SCI, rx_sc->sci,
3155 MACSEC_RXSC_ATTR_PAD)) {
3156 nla_nest_cancel(skb, rxsc_nest);
3157 nla_nest_cancel(skb, rxsc_list);
3158 goto nla_put_failure;
3161 attr = nla_nest_start_noflag(skb, MACSEC_RXSC_ATTR_STATS);
3163 nla_nest_cancel(skb, rxsc_nest);
3164 nla_nest_cancel(skb, rxsc_list);
3165 goto nla_put_failure;
3167 memset(&rx_sc_stats, 0, sizeof(rx_sc_stats));
3168 get_rx_sc_stats(dev, rx_sc, &rx_sc_stats);
3169 if (copy_rx_sc_stats(skb, &rx_sc_stats)) {
3170 nla_nest_cancel(skb, attr);
3171 nla_nest_cancel(skb, rxsc_nest);
3172 nla_nest_cancel(skb, rxsc_list);
3173 goto nla_put_failure;
3175 nla_nest_end(skb, attr);
3177 rxsa_list = nla_nest_start_noflag(skb,
3178 MACSEC_RXSC_ATTR_SA_LIST);
3180 nla_nest_cancel(skb, rxsc_nest);
3181 nla_nest_cancel(skb, rxsc_list);
3182 goto nla_put_failure;
3185 for (i = 0, k = 1; i < MACSEC_NUM_AN; i++) {
3186 struct macsec_rx_sa *rx_sa = rtnl_dereference(rx_sc->sa[i]);
3187 struct nlattr *rxsa_nest;
3194 rxsa_nest = nla_nest_start_noflag(skb, k++);
3196 nla_nest_cancel(skb, rxsa_list);
3197 nla_nest_cancel(skb, rxsc_nest);
3198 nla_nest_cancel(skb, rxsc_list);
3199 goto nla_put_failure;
3202 attr = nla_nest_start_noflag(skb,
3203 MACSEC_SA_ATTR_STATS);
3205 nla_nest_cancel(skb, rxsa_list);
3206 nla_nest_cancel(skb, rxsc_nest);
3207 nla_nest_cancel(skb, rxsc_list);
3208 goto nla_put_failure;
3210 memset(&rx_sa_stats, 0, sizeof(rx_sa_stats));
3211 get_rx_sa_stats(dev, rx_sc, i, rx_sa, &rx_sa_stats);
3212 if (copy_rx_sa_stats(skb, &rx_sa_stats)) {
3213 nla_nest_cancel(skb, attr);
3214 nla_nest_cancel(skb, rxsa_list);
3215 nla_nest_cancel(skb, rxsc_nest);
3216 nla_nest_cancel(skb, rxsc_list);
3217 goto nla_put_failure;
3219 nla_nest_end(skb, attr);
3222 pn = rx_sa->next_pn;
3223 pn_len = MACSEC_XPN_PN_LEN;
3225 pn = rx_sa->next_pn_halves.lower;
3226 pn_len = MACSEC_DEFAULT_PN_LEN;
3229 if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) ||
3230 nla_put(skb, MACSEC_SA_ATTR_PN, pn_len, &pn) ||
3231 nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, rx_sa->key.id) ||
3232 (secy->xpn && nla_put_ssci(skb, MACSEC_SA_ATTR_SSCI, rx_sa->ssci)) ||
3233 nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, rx_sa->active)) {
3234 nla_nest_cancel(skb, rxsa_nest);
3235 nla_nest_cancel(skb, rxsc_nest);
3236 nla_nest_cancel(skb, rxsc_list);
3237 goto nla_put_failure;
3239 nla_nest_end(skb, rxsa_nest);
3242 nla_nest_end(skb, rxsa_list);
3243 nla_nest_end(skb, rxsc_nest);
3246 nla_nest_end(skb, rxsc_list);
3248 genlmsg_end(skb, hdr);
3253 genlmsg_cancel(skb, hdr);
3257 static int macsec_generation = 1; /* protected by RTNL */
3259 static int macsec_dump_txsc(struct sk_buff *skb, struct netlink_callback *cb)
3261 struct net *net = sock_net(skb->sk);
3262 struct net_device *dev;
3265 dev_idx = cb->args[0];
3270 cb->seq = macsec_generation;
3272 for_each_netdev(net, dev) {
3273 struct macsec_secy *secy;
3278 if (!netif_is_macsec(dev))
3281 secy = &macsec_priv(dev)->secy;
3282 if (dump_secy(secy, dev, skb, cb) < 0)
3294 static const struct genl_small_ops macsec_genl_ops[] = {
3296 .cmd = MACSEC_CMD_GET_TXSC,
3297 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3298 .dumpit = macsec_dump_txsc,
3301 .cmd = MACSEC_CMD_ADD_RXSC,
3302 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3303 .doit = macsec_add_rxsc,
3304 .flags = GENL_ADMIN_PERM,
3307 .cmd = MACSEC_CMD_DEL_RXSC,
3308 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3309 .doit = macsec_del_rxsc,
3310 .flags = GENL_ADMIN_PERM,
3313 .cmd = MACSEC_CMD_UPD_RXSC,
3314 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3315 .doit = macsec_upd_rxsc,
3316 .flags = GENL_ADMIN_PERM,
3319 .cmd = MACSEC_CMD_ADD_TXSA,
3320 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3321 .doit = macsec_add_txsa,
3322 .flags = GENL_ADMIN_PERM,
3325 .cmd = MACSEC_CMD_DEL_TXSA,
3326 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3327 .doit = macsec_del_txsa,
3328 .flags = GENL_ADMIN_PERM,
3331 .cmd = MACSEC_CMD_UPD_TXSA,
3332 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3333 .doit = macsec_upd_txsa,
3334 .flags = GENL_ADMIN_PERM,
3337 .cmd = MACSEC_CMD_ADD_RXSA,
3338 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3339 .doit = macsec_add_rxsa,
3340 .flags = GENL_ADMIN_PERM,
3343 .cmd = MACSEC_CMD_DEL_RXSA,
3344 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3345 .doit = macsec_del_rxsa,
3346 .flags = GENL_ADMIN_PERM,
3349 .cmd = MACSEC_CMD_UPD_RXSA,
3350 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3351 .doit = macsec_upd_rxsa,
3352 .flags = GENL_ADMIN_PERM,
3355 .cmd = MACSEC_CMD_UPD_OFFLOAD,
3356 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3357 .doit = macsec_upd_offload,
3358 .flags = GENL_ADMIN_PERM,
3362 static struct genl_family macsec_fam __ro_after_init = {
3363 .name = MACSEC_GENL_NAME,
3365 .version = MACSEC_GENL_VERSION,
3366 .maxattr = MACSEC_ATTR_MAX,
3367 .policy = macsec_genl_policy,
3369 .module = THIS_MODULE,
3370 .small_ops = macsec_genl_ops,
3371 .n_small_ops = ARRAY_SIZE(macsec_genl_ops),
3374 static netdev_tx_t macsec_start_xmit(struct sk_buff *skb,
3375 struct net_device *dev)
3377 struct macsec_dev *macsec = netdev_priv(dev);
3378 struct macsec_secy *secy = &macsec->secy;
3379 struct pcpu_secy_stats *secy_stats;
3382 if (macsec_is_offloaded(netdev_priv(dev))) {
3383 skb->dev = macsec->real_dev;
3384 return dev_queue_xmit(skb);
3388 if (!secy->protect_frames) {
3389 secy_stats = this_cpu_ptr(macsec->stats);
3390 u64_stats_update_begin(&secy_stats->syncp);
3391 secy_stats->stats.OutPktsUntagged++;
3392 u64_stats_update_end(&secy_stats->syncp);
3393 skb->dev = macsec->real_dev;
3395 ret = dev_queue_xmit(skb);
3396 count_tx(dev, ret, len);
3400 if (!secy->operational) {
3402 dev->stats.tx_dropped++;
3403 return NETDEV_TX_OK;
3406 skb = macsec_encrypt(skb, dev);
3408 if (PTR_ERR(skb) != -EINPROGRESS)
3409 dev->stats.tx_dropped++;
3410 return NETDEV_TX_OK;
3413 macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa);
3415 macsec_encrypt_finish(skb, dev);
3417 ret = dev_queue_xmit(skb);
3418 count_tx(dev, ret, len);
3422 #define MACSEC_FEATURES \
3423 (NETIF_F_SG | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST)
3425 static int macsec_dev_init(struct net_device *dev)
3427 struct macsec_dev *macsec = macsec_priv(dev);
3428 struct net_device *real_dev = macsec->real_dev;
3431 dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
3435 err = gro_cells_init(&macsec->gro_cells, dev);
3437 free_percpu(dev->tstats);
3441 dev->features = real_dev->features & MACSEC_FEATURES;
3442 dev->features |= NETIF_F_LLTX | NETIF_F_GSO_SOFTWARE;
3444 dev->needed_headroom = real_dev->needed_headroom +
3445 MACSEC_NEEDED_HEADROOM;
3446 dev->needed_tailroom = real_dev->needed_tailroom +
3447 MACSEC_NEEDED_TAILROOM;
3449 if (is_zero_ether_addr(dev->dev_addr))
3450 eth_hw_addr_inherit(dev, real_dev);
3451 if (is_zero_ether_addr(dev->broadcast))
3452 memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len);
3457 static void macsec_dev_uninit(struct net_device *dev)
3459 struct macsec_dev *macsec = macsec_priv(dev);
3461 gro_cells_destroy(&macsec->gro_cells);
3462 free_percpu(dev->tstats);
3465 static netdev_features_t macsec_fix_features(struct net_device *dev,
3466 netdev_features_t features)
3468 struct macsec_dev *macsec = macsec_priv(dev);
3469 struct net_device *real_dev = macsec->real_dev;
3471 features &= (real_dev->features & MACSEC_FEATURES) |
3472 NETIF_F_GSO_SOFTWARE | NETIF_F_SOFT_FEATURES;
3473 features |= NETIF_F_LLTX;
3478 static int macsec_dev_open(struct net_device *dev)
3480 struct macsec_dev *macsec = macsec_priv(dev);
3481 struct net_device *real_dev = macsec->real_dev;
3484 err = dev_uc_add(real_dev, dev->dev_addr);
3488 if (dev->flags & IFF_ALLMULTI) {
3489 err = dev_set_allmulti(real_dev, 1);
3494 if (dev->flags & IFF_PROMISC) {
3495 err = dev_set_promiscuity(real_dev, 1);
3497 goto clear_allmulti;
3500 /* If h/w offloading is available, propagate to the device */
3501 if (macsec_is_offloaded(macsec)) {
3502 const struct macsec_ops *ops;
3503 struct macsec_context ctx;
3505 ops = macsec_get_ops(netdev_priv(dev), &ctx);
3508 goto clear_allmulti;
3511 ctx.secy = &macsec->secy;
3512 err = macsec_offload(ops->mdo_dev_open, &ctx);
3514 goto clear_allmulti;
3517 if (netif_carrier_ok(real_dev))
3518 netif_carrier_on(dev);
3522 if (dev->flags & IFF_ALLMULTI)
3523 dev_set_allmulti(real_dev, -1);
3525 dev_uc_del(real_dev, dev->dev_addr);
3526 netif_carrier_off(dev);
3530 static int macsec_dev_stop(struct net_device *dev)
3532 struct macsec_dev *macsec = macsec_priv(dev);
3533 struct net_device *real_dev = macsec->real_dev;
3535 netif_carrier_off(dev);
3537 /* If h/w offloading is available, propagate to the device */
3538 if (macsec_is_offloaded(macsec)) {
3539 const struct macsec_ops *ops;
3540 struct macsec_context ctx;
3542 ops = macsec_get_ops(macsec, &ctx);
3544 ctx.secy = &macsec->secy;
3545 macsec_offload(ops->mdo_dev_stop, &ctx);
3549 dev_mc_unsync(real_dev, dev);
3550 dev_uc_unsync(real_dev, dev);
3552 if (dev->flags & IFF_ALLMULTI)
3553 dev_set_allmulti(real_dev, -1);
3555 if (dev->flags & IFF_PROMISC)
3556 dev_set_promiscuity(real_dev, -1);
3558 dev_uc_del(real_dev, dev->dev_addr);
3563 static void macsec_dev_change_rx_flags(struct net_device *dev, int change)
3565 struct net_device *real_dev = macsec_priv(dev)->real_dev;
3567 if (!(dev->flags & IFF_UP))
3570 if (change & IFF_ALLMULTI)
3571 dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1);
3573 if (change & IFF_PROMISC)
3574 dev_set_promiscuity(real_dev,
3575 dev->flags & IFF_PROMISC ? 1 : -1);
3578 static void macsec_dev_set_rx_mode(struct net_device *dev)
3580 struct net_device *real_dev = macsec_priv(dev)->real_dev;
3582 dev_mc_sync(real_dev, dev);
3583 dev_uc_sync(real_dev, dev);
3586 static int macsec_set_mac_address(struct net_device *dev, void *p)
3588 struct macsec_dev *macsec = macsec_priv(dev);
3589 struct net_device *real_dev = macsec->real_dev;
3590 struct sockaddr *addr = p;
3593 if (!is_valid_ether_addr(addr->sa_data))
3594 return -EADDRNOTAVAIL;
3596 if (!(dev->flags & IFF_UP))
3599 err = dev_uc_add(real_dev, addr->sa_data);
3603 dev_uc_del(real_dev, dev->dev_addr);
3606 eth_hw_addr_set(dev, addr->sa_data);
3608 /* If h/w offloading is available, propagate to the device */
3609 if (macsec_is_offloaded(macsec)) {
3610 const struct macsec_ops *ops;
3611 struct macsec_context ctx;
3613 ops = macsec_get_ops(macsec, &ctx);
3615 ctx.secy = &macsec->secy;
3616 macsec_offload(ops->mdo_upd_secy, &ctx);
3623 static int macsec_change_mtu(struct net_device *dev, int new_mtu)
3625 struct macsec_dev *macsec = macsec_priv(dev);
3626 unsigned int extra = macsec->secy.icv_len + macsec_extra_len(true);
3628 if (macsec->real_dev->mtu - extra < new_mtu)
3636 static void macsec_get_stats64(struct net_device *dev,
3637 struct rtnl_link_stats64 *s)
3642 dev_fetch_sw_netstats(s, dev->tstats);
3644 s->rx_dropped = dev->stats.rx_dropped;
3645 s->tx_dropped = dev->stats.tx_dropped;
3648 static int macsec_get_iflink(const struct net_device *dev)
3650 return macsec_priv(dev)->real_dev->ifindex;
3653 static const struct net_device_ops macsec_netdev_ops = {
3654 .ndo_init = macsec_dev_init,
3655 .ndo_uninit = macsec_dev_uninit,
3656 .ndo_open = macsec_dev_open,
3657 .ndo_stop = macsec_dev_stop,
3658 .ndo_fix_features = macsec_fix_features,
3659 .ndo_change_mtu = macsec_change_mtu,
3660 .ndo_set_rx_mode = macsec_dev_set_rx_mode,
3661 .ndo_change_rx_flags = macsec_dev_change_rx_flags,
3662 .ndo_set_mac_address = macsec_set_mac_address,
3663 .ndo_start_xmit = macsec_start_xmit,
3664 .ndo_get_stats64 = macsec_get_stats64,
3665 .ndo_get_iflink = macsec_get_iflink,
3668 static const struct device_type macsec_type = {
3672 static const struct nla_policy macsec_rtnl_policy[IFLA_MACSEC_MAX + 1] = {
3673 [IFLA_MACSEC_SCI] = { .type = NLA_U64 },
3674 [IFLA_MACSEC_PORT] = { .type = NLA_U16 },
3675 [IFLA_MACSEC_ICV_LEN] = { .type = NLA_U8 },
3676 [IFLA_MACSEC_CIPHER_SUITE] = { .type = NLA_U64 },
3677 [IFLA_MACSEC_WINDOW] = { .type = NLA_U32 },
3678 [IFLA_MACSEC_ENCODING_SA] = { .type = NLA_U8 },
3679 [IFLA_MACSEC_ENCRYPT] = { .type = NLA_U8 },
3680 [IFLA_MACSEC_PROTECT] = { .type = NLA_U8 },
3681 [IFLA_MACSEC_INC_SCI] = { .type = NLA_U8 },
3682 [IFLA_MACSEC_ES] = { .type = NLA_U8 },
3683 [IFLA_MACSEC_SCB] = { .type = NLA_U8 },
3684 [IFLA_MACSEC_REPLAY_PROTECT] = { .type = NLA_U8 },
3685 [IFLA_MACSEC_VALIDATION] = { .type = NLA_U8 },
3686 [IFLA_MACSEC_OFFLOAD] = { .type = NLA_U8 },
3689 static void macsec_free_netdev(struct net_device *dev)
3691 struct macsec_dev *macsec = macsec_priv(dev);
3693 free_percpu(macsec->stats);
3694 free_percpu(macsec->secy.tx_sc.stats);
3698 static void macsec_setup(struct net_device *dev)
3702 dev->max_mtu = ETH_MAX_MTU;
3703 dev->priv_flags |= IFF_NO_QUEUE;
3704 dev->netdev_ops = &macsec_netdev_ops;
3705 dev->needs_free_netdev = true;
3706 dev->priv_destructor = macsec_free_netdev;
3707 SET_NETDEV_DEVTYPE(dev, &macsec_type);
3709 eth_zero_addr(dev->broadcast);
3712 static int macsec_changelink_common(struct net_device *dev,
3713 struct nlattr *data[])
3715 struct macsec_secy *secy;
3716 struct macsec_tx_sc *tx_sc;
3718 secy = &macsec_priv(dev)->secy;
3719 tx_sc = &secy->tx_sc;
3721 if (data[IFLA_MACSEC_ENCODING_SA]) {
3722 struct macsec_tx_sa *tx_sa;
3724 tx_sc->encoding_sa = nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]);
3725 tx_sa = rtnl_dereference(tx_sc->sa[tx_sc->encoding_sa]);
3727 secy->operational = tx_sa && tx_sa->active;
3730 if (data[IFLA_MACSEC_ENCRYPT])
3731 tx_sc->encrypt = !!nla_get_u8(data[IFLA_MACSEC_ENCRYPT]);
3733 if (data[IFLA_MACSEC_PROTECT])
3734 secy->protect_frames = !!nla_get_u8(data[IFLA_MACSEC_PROTECT]);
3736 if (data[IFLA_MACSEC_INC_SCI])
3737 tx_sc->send_sci = !!nla_get_u8(data[IFLA_MACSEC_INC_SCI]);
3739 if (data[IFLA_MACSEC_ES])
3740 tx_sc->end_station = !!nla_get_u8(data[IFLA_MACSEC_ES]);
3742 if (data[IFLA_MACSEC_SCB])
3743 tx_sc->scb = !!nla_get_u8(data[IFLA_MACSEC_SCB]);
3745 if (data[IFLA_MACSEC_REPLAY_PROTECT])
3746 secy->replay_protect = !!nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT]);
3748 if (data[IFLA_MACSEC_VALIDATION])
3749 secy->validate_frames = nla_get_u8(data[IFLA_MACSEC_VALIDATION]);
3751 if (data[IFLA_MACSEC_CIPHER_SUITE]) {
3752 switch (nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE])) {
3753 case MACSEC_CIPHER_ID_GCM_AES_128:
3754 case MACSEC_DEFAULT_CIPHER_ID:
3755 secy->key_len = MACSEC_GCM_AES_128_SAK_LEN;
3758 case MACSEC_CIPHER_ID_GCM_AES_256:
3759 secy->key_len = MACSEC_GCM_AES_256_SAK_LEN;
3762 case MACSEC_CIPHER_ID_GCM_AES_XPN_128:
3763 secy->key_len = MACSEC_GCM_AES_128_SAK_LEN;
3766 case MACSEC_CIPHER_ID_GCM_AES_XPN_256:
3767 secy->key_len = MACSEC_GCM_AES_256_SAK_LEN;
3775 if (data[IFLA_MACSEC_WINDOW]) {
3776 secy->replay_window = nla_get_u32(data[IFLA_MACSEC_WINDOW]);
3778 /* IEEE 802.1AEbw-2013 10.7.8 - maximum replay window
3779 * for XPN cipher suites */
3781 secy->replay_window > MACSEC_XPN_MAX_REPLAY_WINDOW)
3788 static int macsec_changelink(struct net_device *dev, struct nlattr *tb[],
3789 struct nlattr *data[],
3790 struct netlink_ext_ack *extack)
3792 struct macsec_dev *macsec = macsec_priv(dev);
3793 struct macsec_tx_sc tx_sc;
3794 struct macsec_secy secy;
3800 if (data[IFLA_MACSEC_CIPHER_SUITE] ||
3801 data[IFLA_MACSEC_ICV_LEN] ||
3802 data[IFLA_MACSEC_SCI] ||
3803 data[IFLA_MACSEC_PORT])
3806 /* Keep a copy of unmodified secy and tx_sc, in case the offload
3807 * propagation fails, to revert macsec_changelink_common.
3809 memcpy(&secy, &macsec->secy, sizeof(secy));
3810 memcpy(&tx_sc, &macsec->secy.tx_sc, sizeof(tx_sc));
3812 ret = macsec_changelink_common(dev, data);
3816 /* If h/w offloading is available, propagate to the device */
3817 if (macsec_is_offloaded(macsec)) {
3818 const struct macsec_ops *ops;
3819 struct macsec_context ctx;
3821 ops = macsec_get_ops(netdev_priv(dev), &ctx);
3827 ctx.secy = &macsec->secy;
3828 ret = macsec_offload(ops->mdo_upd_secy, &ctx);
3836 memcpy(&macsec->secy.tx_sc, &tx_sc, sizeof(tx_sc));
3837 memcpy(&macsec->secy, &secy, sizeof(secy));
3842 static void macsec_del_dev(struct macsec_dev *macsec)
3846 while (macsec->secy.rx_sc) {
3847 struct macsec_rx_sc *rx_sc = rtnl_dereference(macsec->secy.rx_sc);
3849 rcu_assign_pointer(macsec->secy.rx_sc, rx_sc->next);
3853 for (i = 0; i < MACSEC_NUM_AN; i++) {
3854 struct macsec_tx_sa *sa = rtnl_dereference(macsec->secy.tx_sc.sa[i]);
3857 RCU_INIT_POINTER(macsec->secy.tx_sc.sa[i], NULL);
3863 static void macsec_common_dellink(struct net_device *dev, struct list_head *head)
3865 struct macsec_dev *macsec = macsec_priv(dev);
3866 struct net_device *real_dev = macsec->real_dev;
3868 /* If h/w offloading is available, propagate to the device */
3869 if (macsec_is_offloaded(macsec)) {
3870 const struct macsec_ops *ops;
3871 struct macsec_context ctx;
3873 ops = macsec_get_ops(netdev_priv(dev), &ctx);
3875 ctx.secy = &macsec->secy;
3876 macsec_offload(ops->mdo_del_secy, &ctx);
3880 unregister_netdevice_queue(dev, head);
3881 list_del_rcu(&macsec->secys);
3882 macsec_del_dev(macsec);
3883 netdev_upper_dev_unlink(real_dev, dev);
3885 macsec_generation++;
3888 static void macsec_dellink(struct net_device *dev, struct list_head *head)
3890 struct macsec_dev *macsec = macsec_priv(dev);
3891 struct net_device *real_dev = macsec->real_dev;
3892 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
3894 macsec_common_dellink(dev, head);
3896 if (list_empty(&rxd->secys)) {
3897 netdev_rx_handler_unregister(real_dev);
3902 static int register_macsec_dev(struct net_device *real_dev,
3903 struct net_device *dev)
3905 struct macsec_dev *macsec = macsec_priv(dev);
3906 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
3911 rxd = kmalloc(sizeof(*rxd), GFP_KERNEL);
3915 INIT_LIST_HEAD(&rxd->secys);
3917 err = netdev_rx_handler_register(real_dev, macsec_handle_frame,
3925 list_add_tail_rcu(&macsec->secys, &rxd->secys);
3929 static bool sci_exists(struct net_device *dev, sci_t sci)
3931 struct macsec_rxh_data *rxd = macsec_data_rtnl(dev);
3932 struct macsec_dev *macsec;
3934 list_for_each_entry(macsec, &rxd->secys, secys) {
3935 if (macsec->secy.sci == sci)
3942 static sci_t dev_to_sci(struct net_device *dev, __be16 port)
3944 return make_sci(dev->dev_addr, port);
3947 static int macsec_add_dev(struct net_device *dev, sci_t sci, u8 icv_len)
3949 struct macsec_dev *macsec = macsec_priv(dev);
3950 struct macsec_secy *secy = &macsec->secy;
3952 macsec->stats = netdev_alloc_pcpu_stats(struct pcpu_secy_stats);
3956 secy->tx_sc.stats = netdev_alloc_pcpu_stats(struct pcpu_tx_sc_stats);
3957 if (!secy->tx_sc.stats) {
3958 free_percpu(macsec->stats);
3962 if (sci == MACSEC_UNDEF_SCI)
3963 sci = dev_to_sci(dev, MACSEC_PORT_ES);
3966 secy->operational = true;
3967 secy->key_len = DEFAULT_SAK_LEN;
3968 secy->icv_len = icv_len;
3969 secy->validate_frames = MACSEC_VALIDATE_DEFAULT;
3970 secy->protect_frames = true;
3971 secy->replay_protect = false;
3972 secy->xpn = DEFAULT_XPN;
3975 secy->tx_sc.active = true;
3976 secy->tx_sc.encoding_sa = DEFAULT_ENCODING_SA;
3977 secy->tx_sc.encrypt = DEFAULT_ENCRYPT;
3978 secy->tx_sc.send_sci = DEFAULT_SEND_SCI;
3979 secy->tx_sc.end_station = false;
3980 secy->tx_sc.scb = false;
3985 static struct lock_class_key macsec_netdev_addr_lock_key;
3987 static int macsec_newlink(struct net *net, struct net_device *dev,
3988 struct nlattr *tb[], struct nlattr *data[],
3989 struct netlink_ext_ack *extack)
3991 struct macsec_dev *macsec = macsec_priv(dev);
3992 rx_handler_func_t *rx_handler;
3993 u8 icv_len = DEFAULT_ICV_LEN;
3994 struct net_device *real_dev;
4000 real_dev = __dev_get_by_index(net, nla_get_u32(tb[IFLA_LINK]));
4003 if (real_dev->type != ARPHRD_ETHER)
4006 dev->priv_flags |= IFF_MACSEC;
4008 macsec->real_dev = real_dev;
4010 if (data && data[IFLA_MACSEC_OFFLOAD])
4011 macsec->offload = nla_get_offload(data[IFLA_MACSEC_OFFLOAD]);
4013 /* MACsec offloading is off by default */
4014 macsec->offload = MACSEC_OFFLOAD_OFF;
4016 /* Check if the offloading mode is supported by the underlying layers */
4017 if (macsec->offload != MACSEC_OFFLOAD_OFF &&
4018 !macsec_check_offload(macsec->offload, macsec))
4021 /* send_sci must be set to true when transmit sci explicitly is set */
4022 if ((data && data[IFLA_MACSEC_SCI]) &&
4023 (data && data[IFLA_MACSEC_INC_SCI])) {
4024 u8 send_sci = !!nla_get_u8(data[IFLA_MACSEC_INC_SCI]);
4030 if (data && data[IFLA_MACSEC_ICV_LEN])
4031 icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]);
4032 mtu = real_dev->mtu - icv_len - macsec_extra_len(true);
4038 rx_handler = rtnl_dereference(real_dev->rx_handler);
4039 if (rx_handler && rx_handler != macsec_handle_frame)
4042 err = register_netdevice(dev);
4046 netdev_lockdep_set_classes(dev);
4047 lockdep_set_class(&dev->addr_list_lock,
4048 &macsec_netdev_addr_lock_key);
4050 err = netdev_upper_dev_link(real_dev, dev, extack);
4054 /* need to be already registered so that ->init has run and
4055 * the MAC addr is set
4057 if (data && data[IFLA_MACSEC_SCI])
4058 sci = nla_get_sci(data[IFLA_MACSEC_SCI]);
4059 else if (data && data[IFLA_MACSEC_PORT])
4060 sci = dev_to_sci(dev, nla_get_be16(data[IFLA_MACSEC_PORT]));
4062 sci = dev_to_sci(dev, MACSEC_PORT_ES);
4064 if (rx_handler && sci_exists(real_dev, sci)) {
4069 err = macsec_add_dev(dev, sci, icv_len);
4074 err = macsec_changelink_common(dev, data);
4079 /* If h/w offloading is available, propagate to the device */
4080 if (macsec_is_offloaded(macsec)) {
4081 const struct macsec_ops *ops;
4082 struct macsec_context ctx;
4084 ops = macsec_get_ops(macsec, &ctx);
4086 ctx.secy = &macsec->secy;
4087 err = macsec_offload(ops->mdo_add_secy, &ctx);
4093 err = register_macsec_dev(real_dev, dev);
4097 netif_stacked_transfer_operstate(real_dev, dev);
4098 linkwatch_fire_event(dev);
4100 macsec_generation++;
4105 macsec_del_dev(macsec);
4107 netdev_upper_dev_unlink(real_dev, dev);
4109 unregister_netdevice(dev);
4113 static int macsec_validate_attr(struct nlattr *tb[], struct nlattr *data[],
4114 struct netlink_ext_ack *extack)
4116 u64 csid = MACSEC_DEFAULT_CIPHER_ID;
4117 u8 icv_len = DEFAULT_ICV_LEN;
4124 if (data[IFLA_MACSEC_CIPHER_SUITE])
4125 csid = nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE]);
4127 if (data[IFLA_MACSEC_ICV_LEN]) {
4128 icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]);
4129 if (icv_len != DEFAULT_ICV_LEN) {
4130 char dummy_key[DEFAULT_SAK_LEN] = { 0 };
4131 struct crypto_aead *dummy_tfm;
4133 dummy_tfm = macsec_alloc_tfm(dummy_key,
4136 if (IS_ERR(dummy_tfm))
4137 return PTR_ERR(dummy_tfm);
4138 crypto_free_aead(dummy_tfm);
4143 case MACSEC_CIPHER_ID_GCM_AES_128:
4144 case MACSEC_CIPHER_ID_GCM_AES_256:
4145 case MACSEC_CIPHER_ID_GCM_AES_XPN_128:
4146 case MACSEC_CIPHER_ID_GCM_AES_XPN_256:
4147 case MACSEC_DEFAULT_CIPHER_ID:
4148 if (icv_len < MACSEC_MIN_ICV_LEN ||
4149 icv_len > MACSEC_STD_ICV_LEN)
4156 if (data[IFLA_MACSEC_ENCODING_SA]) {
4157 if (nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]) >= MACSEC_NUM_AN)
4161 for (flag = IFLA_MACSEC_ENCODING_SA + 1;
4162 flag < IFLA_MACSEC_VALIDATION;
4165 if (nla_get_u8(data[flag]) > 1)
4170 es = data[IFLA_MACSEC_ES] ? nla_get_u8(data[IFLA_MACSEC_ES]) : false;
4171 sci = data[IFLA_MACSEC_INC_SCI] ? nla_get_u8(data[IFLA_MACSEC_INC_SCI]) : false;
4172 scb = data[IFLA_MACSEC_SCB] ? nla_get_u8(data[IFLA_MACSEC_SCB]) : false;
4174 if ((sci && (scb || es)) || (scb && es))
4177 if (data[IFLA_MACSEC_VALIDATION] &&
4178 nla_get_u8(data[IFLA_MACSEC_VALIDATION]) > MACSEC_VALIDATE_MAX)
4181 if ((data[IFLA_MACSEC_REPLAY_PROTECT] &&
4182 nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT])) &&
4183 !data[IFLA_MACSEC_WINDOW])
4189 static struct net *macsec_get_link_net(const struct net_device *dev)
4191 return dev_net(macsec_priv(dev)->real_dev);
4194 static size_t macsec_get_size(const struct net_device *dev)
4196 return nla_total_size_64bit(8) + /* IFLA_MACSEC_SCI */
4197 nla_total_size(1) + /* IFLA_MACSEC_ICV_LEN */
4198 nla_total_size_64bit(8) + /* IFLA_MACSEC_CIPHER_SUITE */
4199 nla_total_size(4) + /* IFLA_MACSEC_WINDOW */
4200 nla_total_size(1) + /* IFLA_MACSEC_ENCODING_SA */
4201 nla_total_size(1) + /* IFLA_MACSEC_ENCRYPT */
4202 nla_total_size(1) + /* IFLA_MACSEC_PROTECT */
4203 nla_total_size(1) + /* IFLA_MACSEC_INC_SCI */
4204 nla_total_size(1) + /* IFLA_MACSEC_ES */
4205 nla_total_size(1) + /* IFLA_MACSEC_SCB */
4206 nla_total_size(1) + /* IFLA_MACSEC_REPLAY_PROTECT */
4207 nla_total_size(1) + /* IFLA_MACSEC_VALIDATION */
4211 static int macsec_fill_info(struct sk_buff *skb,
4212 const struct net_device *dev)
4214 struct macsec_secy *secy = &macsec_priv(dev)->secy;
4215 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
4218 switch (secy->key_len) {
4219 case MACSEC_GCM_AES_128_SAK_LEN:
4220 csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_128 : MACSEC_DEFAULT_CIPHER_ID;
4222 case MACSEC_GCM_AES_256_SAK_LEN:
4223 csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_256 : MACSEC_CIPHER_ID_GCM_AES_256;
4226 goto nla_put_failure;
4229 if (nla_put_sci(skb, IFLA_MACSEC_SCI, secy->sci,
4231 nla_put_u8(skb, IFLA_MACSEC_ICV_LEN, secy->icv_len) ||
4232 nla_put_u64_64bit(skb, IFLA_MACSEC_CIPHER_SUITE,
4233 csid, IFLA_MACSEC_PAD) ||
4234 nla_put_u8(skb, IFLA_MACSEC_ENCODING_SA, tx_sc->encoding_sa) ||
4235 nla_put_u8(skb, IFLA_MACSEC_ENCRYPT, tx_sc->encrypt) ||
4236 nla_put_u8(skb, IFLA_MACSEC_PROTECT, secy->protect_frames) ||
4237 nla_put_u8(skb, IFLA_MACSEC_INC_SCI, tx_sc->send_sci) ||
4238 nla_put_u8(skb, IFLA_MACSEC_ES, tx_sc->end_station) ||
4239 nla_put_u8(skb, IFLA_MACSEC_SCB, tx_sc->scb) ||
4240 nla_put_u8(skb, IFLA_MACSEC_REPLAY_PROTECT, secy->replay_protect) ||
4241 nla_put_u8(skb, IFLA_MACSEC_VALIDATION, secy->validate_frames) ||
4243 goto nla_put_failure;
4245 if (secy->replay_protect) {
4246 if (nla_put_u32(skb, IFLA_MACSEC_WINDOW, secy->replay_window))
4247 goto nla_put_failure;
4256 static struct rtnl_link_ops macsec_link_ops __read_mostly = {
4258 .priv_size = sizeof(struct macsec_dev),
4259 .maxtype = IFLA_MACSEC_MAX,
4260 .policy = macsec_rtnl_policy,
4261 .setup = macsec_setup,
4262 .validate = macsec_validate_attr,
4263 .newlink = macsec_newlink,
4264 .changelink = macsec_changelink,
4265 .dellink = macsec_dellink,
4266 .get_size = macsec_get_size,
4267 .fill_info = macsec_fill_info,
4268 .get_link_net = macsec_get_link_net,
4271 static bool is_macsec_master(struct net_device *dev)
4273 return rcu_access_pointer(dev->rx_handler) == macsec_handle_frame;
4276 static int macsec_notify(struct notifier_block *this, unsigned long event,
4279 struct net_device *real_dev = netdev_notifier_info_to_dev(ptr);
4282 if (!is_macsec_master(real_dev))
4288 case NETDEV_CHANGE: {
4289 struct macsec_dev *m, *n;
4290 struct macsec_rxh_data *rxd;
4292 rxd = macsec_data_rtnl(real_dev);
4293 list_for_each_entry_safe(m, n, &rxd->secys, secys) {
4294 struct net_device *dev = m->secy.netdev;
4296 netif_stacked_transfer_operstate(real_dev, dev);
4300 case NETDEV_UNREGISTER: {
4301 struct macsec_dev *m, *n;
4302 struct macsec_rxh_data *rxd;
4304 rxd = macsec_data_rtnl(real_dev);
4305 list_for_each_entry_safe(m, n, &rxd->secys, secys) {
4306 macsec_common_dellink(m->secy.netdev, &head);
4309 netdev_rx_handler_unregister(real_dev);
4312 unregister_netdevice_many(&head);
4315 case NETDEV_CHANGEMTU: {
4316 struct macsec_dev *m;
4317 struct macsec_rxh_data *rxd;
4319 rxd = macsec_data_rtnl(real_dev);
4320 list_for_each_entry(m, &rxd->secys, secys) {
4321 struct net_device *dev = m->secy.netdev;
4322 unsigned int mtu = real_dev->mtu - (m->secy.icv_len +
4323 macsec_extra_len(true));
4326 dev_set_mtu(dev, mtu);
4334 static struct notifier_block macsec_notifier = {
4335 .notifier_call = macsec_notify,
4338 static int __init macsec_init(void)
4342 pr_info("MACsec IEEE 802.1AE\n");
4343 err = register_netdevice_notifier(&macsec_notifier);
4347 err = rtnl_link_register(&macsec_link_ops);
4351 err = genl_register_family(&macsec_fam);
4358 rtnl_link_unregister(&macsec_link_ops);
4360 unregister_netdevice_notifier(&macsec_notifier);
4364 static void __exit macsec_exit(void)
4366 genl_unregister_family(&macsec_fam);
4367 rtnl_link_unregister(&macsec_link_ops);
4368 unregister_netdevice_notifier(&macsec_notifier);
4372 module_init(macsec_init);
4373 module_exit(macsec_exit);
4375 MODULE_ALIAS_RTNL_LINK("macsec");
4376 MODULE_ALIAS_GENL_FAMILY("macsec");
4378 MODULE_DESCRIPTION("MACsec IEEE 802.1AE");
4379 MODULE_LICENSE("GPL v2");