1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * drivers/net/macsec.c - MACsec device
5 * Copyright (c) 2015 Sabrina Dubroca <sd@queasysnail.net>
8 #include <linux/types.h>
9 #include <linux/skbuff.h>
10 #include <linux/socket.h>
11 #include <linux/module.h>
12 #include <crypto/aead.h>
13 #include <linux/etherdevice.h>
14 #include <linux/netdevice.h>
15 #include <linux/rtnetlink.h>
16 #include <linux/refcount.h>
17 #include <net/genetlink.h>
19 #include <net/gro_cells.h>
20 #include <net/macsec.h>
21 #include <linux/phy.h>
22 #include <linux/byteorder/generic.h>
23 #include <linux/if_arp.h>
25 #include <uapi/linux/if_macsec.h>
27 #define MACSEC_SCI_LEN 8
29 /* SecTAG length = macsec_eth_header without the optional SCI */
30 #define MACSEC_TAG_LEN 6
32 struct macsec_eth_header {
36 #if defined(__LITTLE_ENDIAN_BITFIELD)
39 #elif defined(__BIG_ENDIAN_BITFIELD)
43 #error "Please fix <asm/byteorder.h>"
46 u8 secure_channel_id[8]; /* optional */
49 #define MACSEC_TCI_VERSION 0x80
50 #define MACSEC_TCI_ES 0x40 /* end station */
51 #define MACSEC_TCI_SC 0x20 /* SCI present */
52 #define MACSEC_TCI_SCB 0x10 /* epon */
53 #define MACSEC_TCI_E 0x08 /* encryption */
54 #define MACSEC_TCI_C 0x04 /* changed text */
55 #define MACSEC_AN_MASK 0x03 /* association number */
56 #define MACSEC_TCI_CONFID (MACSEC_TCI_E | MACSEC_TCI_C)
58 /* minimum secure data length deemed "not short", see IEEE 802.1AE-2006 9.7 */
59 #define MIN_NON_SHORT_LEN 48
61 #define GCM_AES_IV_LEN 12
62 #define DEFAULT_ICV_LEN 16
64 #define for_each_rxsc(secy, sc) \
65 for (sc = rcu_dereference_bh(secy->rx_sc); \
67 sc = rcu_dereference_bh(sc->next))
68 #define for_each_rxsc_rtnl(secy, sc) \
69 for (sc = rtnl_dereference(secy->rx_sc); \
71 sc = rtnl_dereference(sc->next))
73 #define pn_same_half(pn1, pn2) (!(((pn1) >> 31) ^ ((pn2) >> 31)))
77 u8 short_secure_channel_id[4];
85 u8 secure_channel_id[8];
91 #define MACSEC_VALIDATE_DEFAULT MACSEC_VALIDATE_STRICT
93 struct pcpu_secy_stats {
94 struct macsec_dev_stats stats;
95 struct u64_stats_sync syncp;
99 * struct macsec_dev - private data
101 * @real_dev: pointer to underlying netdevice
102 * @stats: MACsec device stats
103 * @secys: linked list of SecY's on the underlying device
104 * @offload: status of offloading on the MACsec device
107 struct macsec_secy secy;
108 struct net_device *real_dev;
109 struct pcpu_secy_stats __percpu *stats;
110 struct list_head secys;
111 struct gro_cells gro_cells;
112 enum macsec_offload offload;
116 * struct macsec_rxh_data - rx_handler private argument
117 * @secys: linked list of SecY's on this underlying device
119 struct macsec_rxh_data {
120 struct list_head secys;
123 static struct macsec_dev *macsec_priv(const struct net_device *dev)
125 return (struct macsec_dev *)netdev_priv(dev);
128 static struct macsec_rxh_data *macsec_data_rcu(const struct net_device *dev)
130 return rcu_dereference_bh(dev->rx_handler_data);
133 static struct macsec_rxh_data *macsec_data_rtnl(const struct net_device *dev)
135 return rtnl_dereference(dev->rx_handler_data);
139 struct aead_request *req;
141 struct macsec_tx_sa *tx_sa;
142 struct macsec_rx_sa *rx_sa;
149 static struct macsec_rx_sa *macsec_rxsa_get(struct macsec_rx_sa __rcu *ptr)
151 struct macsec_rx_sa *sa = rcu_dereference_bh(ptr);
153 if (!sa || !sa->active)
156 if (!refcount_inc_not_zero(&sa->refcnt))
162 static void free_rx_sc_rcu(struct rcu_head *head)
164 struct macsec_rx_sc *rx_sc = container_of(head, struct macsec_rx_sc, rcu_head);
166 free_percpu(rx_sc->stats);
170 static struct macsec_rx_sc *macsec_rxsc_get(struct macsec_rx_sc *sc)
172 return refcount_inc_not_zero(&sc->refcnt) ? sc : NULL;
175 static void macsec_rxsc_put(struct macsec_rx_sc *sc)
177 if (refcount_dec_and_test(&sc->refcnt))
178 call_rcu(&sc->rcu_head, free_rx_sc_rcu);
181 static void free_rxsa(struct rcu_head *head)
183 struct macsec_rx_sa *sa = container_of(head, struct macsec_rx_sa, rcu);
185 crypto_free_aead(sa->key.tfm);
186 free_percpu(sa->stats);
190 static void macsec_rxsa_put(struct macsec_rx_sa *sa)
192 if (refcount_dec_and_test(&sa->refcnt))
193 call_rcu(&sa->rcu, free_rxsa);
196 static struct macsec_tx_sa *macsec_txsa_get(struct macsec_tx_sa __rcu *ptr)
198 struct macsec_tx_sa *sa = rcu_dereference_bh(ptr);
200 if (!sa || !sa->active)
203 if (!refcount_inc_not_zero(&sa->refcnt))
209 static void free_txsa(struct rcu_head *head)
211 struct macsec_tx_sa *sa = container_of(head, struct macsec_tx_sa, rcu);
213 crypto_free_aead(sa->key.tfm);
214 free_percpu(sa->stats);
218 static void macsec_txsa_put(struct macsec_tx_sa *sa)
220 if (refcount_dec_and_test(&sa->refcnt))
221 call_rcu(&sa->rcu, free_txsa);
224 static struct macsec_cb *macsec_skb_cb(struct sk_buff *skb)
226 BUILD_BUG_ON(sizeof(struct macsec_cb) > sizeof(skb->cb));
227 return (struct macsec_cb *)skb->cb;
230 #define MACSEC_PORT_ES (htons(0x0001))
231 #define MACSEC_PORT_SCB (0x0000)
232 #define MACSEC_UNDEF_SCI ((__force sci_t)0xffffffffffffffffULL)
233 #define MACSEC_UNDEF_SSCI ((__force ssci_t)0xffffffff)
235 #define MACSEC_GCM_AES_128_SAK_LEN 16
236 #define MACSEC_GCM_AES_256_SAK_LEN 32
238 #define DEFAULT_SAK_LEN MACSEC_GCM_AES_128_SAK_LEN
239 #define DEFAULT_XPN false
240 #define DEFAULT_SEND_SCI true
241 #define DEFAULT_ENCRYPT false
242 #define DEFAULT_ENCODING_SA 0
244 static bool send_sci(const struct macsec_secy *secy)
246 const struct macsec_tx_sc *tx_sc = &secy->tx_sc;
248 return tx_sc->send_sci ||
249 (secy->n_rx_sc > 1 && !tx_sc->end_station && !tx_sc->scb);
252 static sci_t make_sci(u8 *addr, __be16 port)
256 memcpy(&sci, addr, ETH_ALEN);
257 memcpy(((char *)&sci) + ETH_ALEN, &port, sizeof(port));
262 static sci_t macsec_frame_sci(struct macsec_eth_header *hdr, bool sci_present)
267 memcpy(&sci, hdr->secure_channel_id,
268 sizeof(hdr->secure_channel_id));
270 sci = make_sci(hdr->eth.h_source, MACSEC_PORT_ES);
275 static unsigned int macsec_sectag_len(bool sci_present)
277 return MACSEC_TAG_LEN + (sci_present ? MACSEC_SCI_LEN : 0);
280 static unsigned int macsec_hdr_len(bool sci_present)
282 return macsec_sectag_len(sci_present) + ETH_HLEN;
285 static unsigned int macsec_extra_len(bool sci_present)
287 return macsec_sectag_len(sci_present) + sizeof(__be16);
290 /* Fill SecTAG according to IEEE 802.1AE-2006 10.5.3 */
291 static void macsec_fill_sectag(struct macsec_eth_header *h,
292 const struct macsec_secy *secy, u32 pn,
295 const struct macsec_tx_sc *tx_sc = &secy->tx_sc;
297 memset(&h->tci_an, 0, macsec_sectag_len(sci_present));
298 h->eth.h_proto = htons(ETH_P_MACSEC);
301 h->tci_an |= MACSEC_TCI_SC;
302 memcpy(&h->secure_channel_id, &secy->sci,
303 sizeof(h->secure_channel_id));
305 if (tx_sc->end_station)
306 h->tci_an |= MACSEC_TCI_ES;
308 h->tci_an |= MACSEC_TCI_SCB;
311 h->packet_number = htonl(pn);
313 /* with GCM, C/E clear for !encrypt, both set for encrypt */
315 h->tci_an |= MACSEC_TCI_CONFID;
316 else if (secy->icv_len != DEFAULT_ICV_LEN)
317 h->tci_an |= MACSEC_TCI_C;
319 h->tci_an |= tx_sc->encoding_sa;
322 static void macsec_set_shortlen(struct macsec_eth_header *h, size_t data_len)
324 if (data_len < MIN_NON_SHORT_LEN)
325 h->short_length = data_len;
328 /* Checks if a MACsec interface is being offloaded to an hardware engine */
329 static bool macsec_is_offloaded(struct macsec_dev *macsec)
331 if (macsec->offload == MACSEC_OFFLOAD_MAC ||
332 macsec->offload == MACSEC_OFFLOAD_PHY)
338 /* Checks if underlying layers implement MACsec offloading functions. */
339 static bool macsec_check_offload(enum macsec_offload offload,
340 struct macsec_dev *macsec)
342 if (!macsec || !macsec->real_dev)
345 if (offload == MACSEC_OFFLOAD_PHY)
346 return macsec->real_dev->phydev &&
347 macsec->real_dev->phydev->macsec_ops;
348 else if (offload == MACSEC_OFFLOAD_MAC)
349 return macsec->real_dev->features & NETIF_F_HW_MACSEC &&
350 macsec->real_dev->macsec_ops;
355 static const struct macsec_ops *__macsec_get_ops(enum macsec_offload offload,
356 struct macsec_dev *macsec,
357 struct macsec_context *ctx)
360 memset(ctx, 0, sizeof(*ctx));
361 ctx->offload = offload;
363 if (offload == MACSEC_OFFLOAD_PHY)
364 ctx->phydev = macsec->real_dev->phydev;
365 else if (offload == MACSEC_OFFLOAD_MAC)
366 ctx->netdev = macsec->real_dev;
369 if (offload == MACSEC_OFFLOAD_PHY)
370 return macsec->real_dev->phydev->macsec_ops;
372 return macsec->real_dev->macsec_ops;
375 /* Returns a pointer to the MACsec ops struct if any and updates the MACsec
376 * context device reference if provided.
378 static const struct macsec_ops *macsec_get_ops(struct macsec_dev *macsec,
379 struct macsec_context *ctx)
381 if (!macsec_check_offload(macsec->offload, macsec))
384 return __macsec_get_ops(macsec->offload, macsec, ctx);
387 /* validate MACsec packet according to IEEE 802.1AE-2018 9.12 */
388 static bool macsec_validate_skb(struct sk_buff *skb, u16 icv_len, bool xpn)
390 struct macsec_eth_header *h = (struct macsec_eth_header *)skb->data;
391 int len = skb->len - 2 * ETH_ALEN;
392 int extra_len = macsec_extra_len(!!(h->tci_an & MACSEC_TCI_SC)) + icv_len;
394 /* a) It comprises at least 17 octets */
398 /* b) MACsec EtherType: already checked */
400 /* c) V bit is clear */
401 if (h->tci_an & MACSEC_TCI_VERSION)
404 /* d) ES or SCB => !SC */
405 if ((h->tci_an & MACSEC_TCI_ES || h->tci_an & MACSEC_TCI_SCB) &&
406 (h->tci_an & MACSEC_TCI_SC))
409 /* e) Bits 7 and 8 of octet 4 of the SecTAG are clear */
413 /* rx.pn != 0 if not XPN (figure 10-5 with 802.11AEbw-2013 amendment) */
414 if (!h->packet_number && !xpn)
417 /* length check, f) g) h) i) */
419 return len == extra_len + h->short_length;
420 return len >= extra_len + MIN_NON_SHORT_LEN;
423 #define MACSEC_NEEDED_HEADROOM (macsec_extra_len(true))
424 #define MACSEC_NEEDED_TAILROOM MACSEC_STD_ICV_LEN
426 static void macsec_fill_iv_xpn(unsigned char *iv, ssci_t ssci, u64 pn,
429 struct gcm_iv_xpn *gcm_iv = (struct gcm_iv_xpn *)iv;
431 gcm_iv->ssci = ssci ^ salt.ssci;
432 gcm_iv->pn = cpu_to_be64(pn) ^ salt.pn;
435 static void macsec_fill_iv(unsigned char *iv, sci_t sci, u32 pn)
437 struct gcm_iv *gcm_iv = (struct gcm_iv *)iv;
440 gcm_iv->pn = htonl(pn);
443 static struct macsec_eth_header *macsec_ethhdr(struct sk_buff *skb)
445 return (struct macsec_eth_header *)skb_mac_header(skb);
448 static sci_t dev_to_sci(struct net_device *dev, __be16 port)
450 return make_sci(dev->dev_addr, port);
453 static void __macsec_pn_wrapped(struct macsec_secy *secy,
454 struct macsec_tx_sa *tx_sa)
456 pr_debug("PN wrapped, transitioning to !oper\n");
457 tx_sa->active = false;
458 if (secy->protect_frames)
459 secy->operational = false;
462 void macsec_pn_wrapped(struct macsec_secy *secy, struct macsec_tx_sa *tx_sa)
464 spin_lock_bh(&tx_sa->lock);
465 __macsec_pn_wrapped(secy, tx_sa);
466 spin_unlock_bh(&tx_sa->lock);
468 EXPORT_SYMBOL_GPL(macsec_pn_wrapped);
470 static pn_t tx_sa_update_pn(struct macsec_tx_sa *tx_sa,
471 struct macsec_secy *secy)
475 spin_lock_bh(&tx_sa->lock);
477 pn = tx_sa->next_pn_halves;
481 tx_sa->next_pn_halves.lower++;
483 if (tx_sa->next_pn == 0)
484 __macsec_pn_wrapped(secy, tx_sa);
485 spin_unlock_bh(&tx_sa->lock);
490 static void macsec_encrypt_finish(struct sk_buff *skb, struct net_device *dev)
492 struct macsec_dev *macsec = netdev_priv(dev);
494 skb->dev = macsec->real_dev;
495 skb_reset_mac_header(skb);
496 skb->protocol = eth_hdr(skb)->h_proto;
499 static void macsec_count_tx(struct sk_buff *skb, struct macsec_tx_sc *tx_sc,
500 struct macsec_tx_sa *tx_sa)
502 struct pcpu_tx_sc_stats *txsc_stats = this_cpu_ptr(tx_sc->stats);
504 u64_stats_update_begin(&txsc_stats->syncp);
505 if (tx_sc->encrypt) {
506 txsc_stats->stats.OutOctetsEncrypted += skb->len;
507 txsc_stats->stats.OutPktsEncrypted++;
508 this_cpu_inc(tx_sa->stats->OutPktsEncrypted);
510 txsc_stats->stats.OutOctetsProtected += skb->len;
511 txsc_stats->stats.OutPktsProtected++;
512 this_cpu_inc(tx_sa->stats->OutPktsProtected);
514 u64_stats_update_end(&txsc_stats->syncp);
517 static void count_tx(struct net_device *dev, int ret, int len)
519 if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
520 struct pcpu_sw_netstats *stats = this_cpu_ptr(dev->tstats);
522 u64_stats_update_begin(&stats->syncp);
524 stats->tx_bytes += len;
525 u64_stats_update_end(&stats->syncp);
529 static void macsec_encrypt_done(struct crypto_async_request *base, int err)
531 struct sk_buff *skb = base->data;
532 struct net_device *dev = skb->dev;
533 struct macsec_dev *macsec = macsec_priv(dev);
534 struct macsec_tx_sa *sa = macsec_skb_cb(skb)->tx_sa;
537 aead_request_free(macsec_skb_cb(skb)->req);
540 macsec_encrypt_finish(skb, dev);
541 macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa);
543 ret = dev_queue_xmit(skb);
544 count_tx(dev, ret, len);
545 rcu_read_unlock_bh();
551 static struct aead_request *macsec_alloc_req(struct crypto_aead *tfm,
553 struct scatterlist **sg,
556 size_t size, iv_offset, sg_offset;
557 struct aead_request *req;
560 size = sizeof(struct aead_request) + crypto_aead_reqsize(tfm);
562 size += GCM_AES_IV_LEN;
564 size = ALIGN(size, __alignof__(struct scatterlist));
566 size += sizeof(struct scatterlist) * num_frags;
568 tmp = kmalloc(size, GFP_ATOMIC);
572 *iv = (unsigned char *)(tmp + iv_offset);
573 *sg = (struct scatterlist *)(tmp + sg_offset);
576 aead_request_set_tfm(req, tfm);
581 static struct sk_buff *macsec_encrypt(struct sk_buff *skb,
582 struct net_device *dev)
585 struct scatterlist *sg;
586 struct sk_buff *trailer;
589 struct macsec_eth_header *hh;
590 size_t unprotected_len;
591 struct aead_request *req;
592 struct macsec_secy *secy;
593 struct macsec_tx_sc *tx_sc;
594 struct macsec_tx_sa *tx_sa;
595 struct macsec_dev *macsec = macsec_priv(dev);
599 secy = &macsec->secy;
600 tx_sc = &secy->tx_sc;
602 /* 10.5.1 TX SA assignment */
603 tx_sa = macsec_txsa_get(tx_sc->sa[tx_sc->encoding_sa]);
605 secy->operational = false;
607 return ERR_PTR(-EINVAL);
610 if (unlikely(skb_headroom(skb) < MACSEC_NEEDED_HEADROOM ||
611 skb_tailroom(skb) < MACSEC_NEEDED_TAILROOM)) {
612 struct sk_buff *nskb = skb_copy_expand(skb,
613 MACSEC_NEEDED_HEADROOM,
614 MACSEC_NEEDED_TAILROOM,
620 macsec_txsa_put(tx_sa);
622 return ERR_PTR(-ENOMEM);
625 skb = skb_unshare(skb, GFP_ATOMIC);
627 macsec_txsa_put(tx_sa);
628 return ERR_PTR(-ENOMEM);
632 unprotected_len = skb->len;
634 sci_present = send_sci(secy);
635 hh = skb_push(skb, macsec_extra_len(sci_present));
636 memmove(hh, eth, 2 * ETH_ALEN);
638 pn = tx_sa_update_pn(tx_sa, secy);
639 if (pn.full64 == 0) {
640 macsec_txsa_put(tx_sa);
642 return ERR_PTR(-ENOLINK);
644 macsec_fill_sectag(hh, secy, pn.lower, sci_present);
645 macsec_set_shortlen(hh, unprotected_len - 2 * ETH_ALEN);
647 skb_put(skb, secy->icv_len);
649 if (skb->len - ETH_HLEN > macsec_priv(dev)->real_dev->mtu) {
650 struct pcpu_secy_stats *secy_stats = this_cpu_ptr(macsec->stats);
652 u64_stats_update_begin(&secy_stats->syncp);
653 secy_stats->stats.OutPktsTooLong++;
654 u64_stats_update_end(&secy_stats->syncp);
656 macsec_txsa_put(tx_sa);
658 return ERR_PTR(-EINVAL);
661 ret = skb_cow_data(skb, 0, &trailer);
662 if (unlikely(ret < 0)) {
663 macsec_txsa_put(tx_sa);
668 req = macsec_alloc_req(tx_sa->key.tfm, &iv, &sg, ret);
670 macsec_txsa_put(tx_sa);
672 return ERR_PTR(-ENOMEM);
676 macsec_fill_iv_xpn(iv, tx_sa->ssci, pn.full64, tx_sa->key.salt);
678 macsec_fill_iv(iv, secy->sci, pn.lower);
680 sg_init_table(sg, ret);
681 ret = skb_to_sgvec(skb, sg, 0, skb->len);
682 if (unlikely(ret < 0)) {
683 aead_request_free(req);
684 macsec_txsa_put(tx_sa);
689 if (tx_sc->encrypt) {
690 int len = skb->len - macsec_hdr_len(sci_present) -
692 aead_request_set_crypt(req, sg, sg, len, iv);
693 aead_request_set_ad(req, macsec_hdr_len(sci_present));
695 aead_request_set_crypt(req, sg, sg, 0, iv);
696 aead_request_set_ad(req, skb->len - secy->icv_len);
699 macsec_skb_cb(skb)->req = req;
700 macsec_skb_cb(skb)->tx_sa = tx_sa;
701 aead_request_set_callback(req, 0, macsec_encrypt_done, skb);
704 ret = crypto_aead_encrypt(req);
705 if (ret == -EINPROGRESS) {
707 } else if (ret != 0) {
710 aead_request_free(req);
711 macsec_txsa_put(tx_sa);
712 return ERR_PTR(-EINVAL);
716 aead_request_free(req);
717 macsec_txsa_put(tx_sa);
722 static bool macsec_post_decrypt(struct sk_buff *skb, struct macsec_secy *secy, u32 pn)
724 struct macsec_rx_sa *rx_sa = macsec_skb_cb(skb)->rx_sa;
725 struct pcpu_rx_sc_stats *rxsc_stats = this_cpu_ptr(rx_sa->sc->stats);
726 struct macsec_eth_header *hdr = macsec_ethhdr(skb);
729 spin_lock(&rx_sa->lock);
730 if (rx_sa->next_pn_halves.lower >= secy->replay_window)
731 lowest_pn = rx_sa->next_pn_halves.lower - secy->replay_window;
733 /* Now perform replay protection check again
734 * (see IEEE 802.1AE-2006 figure 10-5)
736 if (secy->replay_protect && pn < lowest_pn &&
737 (!secy->xpn || pn_same_half(pn, lowest_pn))) {
738 spin_unlock(&rx_sa->lock);
739 u64_stats_update_begin(&rxsc_stats->syncp);
740 rxsc_stats->stats.InPktsLate++;
741 u64_stats_update_end(&rxsc_stats->syncp);
745 if (secy->validate_frames != MACSEC_VALIDATE_DISABLED) {
746 u64_stats_update_begin(&rxsc_stats->syncp);
747 if (hdr->tci_an & MACSEC_TCI_E)
748 rxsc_stats->stats.InOctetsDecrypted += skb->len;
750 rxsc_stats->stats.InOctetsValidated += skb->len;
751 u64_stats_update_end(&rxsc_stats->syncp);
754 if (!macsec_skb_cb(skb)->valid) {
755 spin_unlock(&rx_sa->lock);
758 if (hdr->tci_an & MACSEC_TCI_C ||
759 secy->validate_frames == MACSEC_VALIDATE_STRICT) {
760 u64_stats_update_begin(&rxsc_stats->syncp);
761 rxsc_stats->stats.InPktsNotValid++;
762 u64_stats_update_end(&rxsc_stats->syncp);
766 u64_stats_update_begin(&rxsc_stats->syncp);
767 if (secy->validate_frames == MACSEC_VALIDATE_CHECK) {
768 rxsc_stats->stats.InPktsInvalid++;
769 this_cpu_inc(rx_sa->stats->InPktsInvalid);
770 } else if (pn < lowest_pn) {
771 rxsc_stats->stats.InPktsDelayed++;
773 rxsc_stats->stats.InPktsUnchecked++;
775 u64_stats_update_end(&rxsc_stats->syncp);
777 u64_stats_update_begin(&rxsc_stats->syncp);
778 if (pn < lowest_pn) {
779 rxsc_stats->stats.InPktsDelayed++;
781 rxsc_stats->stats.InPktsOK++;
782 this_cpu_inc(rx_sa->stats->InPktsOK);
784 u64_stats_update_end(&rxsc_stats->syncp);
786 // Instead of "pn >=" - to support pn overflow in xpn
787 if (pn + 1 > rx_sa->next_pn_halves.lower) {
788 rx_sa->next_pn_halves.lower = pn + 1;
789 } else if (secy->xpn &&
790 !pn_same_half(pn, rx_sa->next_pn_halves.lower)) {
791 rx_sa->next_pn_halves.upper++;
792 rx_sa->next_pn_halves.lower = pn + 1;
795 spin_unlock(&rx_sa->lock);
801 static void macsec_reset_skb(struct sk_buff *skb, struct net_device *dev)
803 skb->pkt_type = PACKET_HOST;
804 skb->protocol = eth_type_trans(skb, dev);
806 skb_reset_network_header(skb);
807 if (!skb_transport_header_was_set(skb))
808 skb_reset_transport_header(skb);
809 skb_reset_mac_len(skb);
812 static void macsec_finalize_skb(struct sk_buff *skb, u8 icv_len, u8 hdr_len)
814 skb->ip_summed = CHECKSUM_NONE;
815 memmove(skb->data + hdr_len, skb->data, 2 * ETH_ALEN);
816 skb_pull(skb, hdr_len);
817 pskb_trim_unique(skb, skb->len - icv_len);
820 static void count_rx(struct net_device *dev, int len)
822 struct pcpu_sw_netstats *stats = this_cpu_ptr(dev->tstats);
824 u64_stats_update_begin(&stats->syncp);
826 stats->rx_bytes += len;
827 u64_stats_update_end(&stats->syncp);
830 static void macsec_decrypt_done(struct crypto_async_request *base, int err)
832 struct sk_buff *skb = base->data;
833 struct net_device *dev = skb->dev;
834 struct macsec_dev *macsec = macsec_priv(dev);
835 struct macsec_rx_sa *rx_sa = macsec_skb_cb(skb)->rx_sa;
836 struct macsec_rx_sc *rx_sc = rx_sa->sc;
840 aead_request_free(macsec_skb_cb(skb)->req);
843 macsec_skb_cb(skb)->valid = true;
846 pn = ntohl(macsec_ethhdr(skb)->packet_number);
847 if (!macsec_post_decrypt(skb, &macsec->secy, pn)) {
848 rcu_read_unlock_bh();
853 macsec_finalize_skb(skb, macsec->secy.icv_len,
854 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
855 macsec_reset_skb(skb, macsec->secy.netdev);
858 if (gro_cells_receive(&macsec->gro_cells, skb) == NET_RX_SUCCESS)
861 rcu_read_unlock_bh();
864 macsec_rxsa_put(rx_sa);
865 macsec_rxsc_put(rx_sc);
869 static struct sk_buff *macsec_decrypt(struct sk_buff *skb,
870 struct net_device *dev,
871 struct macsec_rx_sa *rx_sa,
873 struct macsec_secy *secy)
876 struct scatterlist *sg;
877 struct sk_buff *trailer;
879 struct aead_request *req;
880 struct macsec_eth_header *hdr;
882 u16 icv_len = secy->icv_len;
884 macsec_skb_cb(skb)->valid = false;
885 skb = skb_share_check(skb, GFP_ATOMIC);
887 return ERR_PTR(-ENOMEM);
889 ret = skb_cow_data(skb, 0, &trailer);
890 if (unlikely(ret < 0)) {
894 req = macsec_alloc_req(rx_sa->key.tfm, &iv, &sg, ret);
897 return ERR_PTR(-ENOMEM);
900 hdr = (struct macsec_eth_header *)skb->data;
901 hdr_pn = ntohl(hdr->packet_number);
904 pn_t recovered_pn = rx_sa->next_pn_halves;
906 recovered_pn.lower = hdr_pn;
907 if (hdr_pn < rx_sa->next_pn_halves.lower &&
908 !pn_same_half(hdr_pn, rx_sa->next_pn_halves.lower))
909 recovered_pn.upper++;
911 macsec_fill_iv_xpn(iv, rx_sa->ssci, recovered_pn.full64,
914 macsec_fill_iv(iv, sci, hdr_pn);
917 sg_init_table(sg, ret);
918 ret = skb_to_sgvec(skb, sg, 0, skb->len);
919 if (unlikely(ret < 0)) {
920 aead_request_free(req);
925 if (hdr->tci_an & MACSEC_TCI_E) {
926 /* confidentiality: ethernet + macsec header
927 * authenticated, encrypted payload
929 int len = skb->len - macsec_hdr_len(macsec_skb_cb(skb)->has_sci);
931 aead_request_set_crypt(req, sg, sg, len, iv);
932 aead_request_set_ad(req, macsec_hdr_len(macsec_skb_cb(skb)->has_sci));
933 skb = skb_unshare(skb, GFP_ATOMIC);
935 aead_request_free(req);
936 return ERR_PTR(-ENOMEM);
939 /* integrity only: all headers + data authenticated */
940 aead_request_set_crypt(req, sg, sg, icv_len, iv);
941 aead_request_set_ad(req, skb->len - icv_len);
944 macsec_skb_cb(skb)->req = req;
946 aead_request_set_callback(req, 0, macsec_decrypt_done, skb);
949 ret = crypto_aead_decrypt(req);
950 if (ret == -EINPROGRESS) {
952 } else if (ret != 0) {
953 /* decryption/authentication failed
954 * 10.6 if validateFrames is disabled, deliver anyway
956 if (ret != -EBADMSG) {
961 macsec_skb_cb(skb)->valid = true;
965 aead_request_free(req);
970 static struct macsec_rx_sc *find_rx_sc(struct macsec_secy *secy, sci_t sci)
972 struct macsec_rx_sc *rx_sc;
974 for_each_rxsc(secy, rx_sc) {
975 if (rx_sc->sci == sci)
982 static struct macsec_rx_sc *find_rx_sc_rtnl(struct macsec_secy *secy, sci_t sci)
984 struct macsec_rx_sc *rx_sc;
986 for_each_rxsc_rtnl(secy, rx_sc) {
987 if (rx_sc->sci == sci)
994 static enum rx_handler_result handle_not_macsec(struct sk_buff *skb)
996 /* Deliver to the uncontrolled port by default */
997 enum rx_handler_result ret = RX_HANDLER_PASS;
998 struct ethhdr *hdr = eth_hdr(skb);
999 struct macsec_rxh_data *rxd;
1000 struct macsec_dev *macsec;
1003 rxd = macsec_data_rcu(skb->dev);
1005 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1006 struct sk_buff *nskb;
1007 struct pcpu_secy_stats *secy_stats = this_cpu_ptr(macsec->stats);
1008 struct net_device *ndev = macsec->secy.netdev;
1010 /* If h/w offloading is enabled, HW decodes frames and strips
1011 * the SecTAG, so we have to deduce which port to deliver to.
1013 if (macsec_is_offloaded(macsec) && netif_running(ndev)) {
1014 if (ether_addr_equal_64bits(hdr->h_dest,
1016 /* exact match, divert skb to this port */
1018 skb->pkt_type = PACKET_HOST;
1019 ret = RX_HANDLER_ANOTHER;
1021 } else if (is_multicast_ether_addr_64bits(
1023 /* multicast frame, deliver on this port too */
1024 nskb = skb_clone(skb, GFP_ATOMIC);
1029 if (ether_addr_equal_64bits(hdr->h_dest,
1031 nskb->pkt_type = PACKET_BROADCAST;
1033 nskb->pkt_type = PACKET_MULTICAST;
1040 /* 10.6 If the management control validateFrames is not
1041 * Strict, frames without a SecTAG are received, counted, and
1042 * delivered to the Controlled Port
1044 if (macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) {
1045 u64_stats_update_begin(&secy_stats->syncp);
1046 secy_stats->stats.InPktsNoTag++;
1047 u64_stats_update_end(&secy_stats->syncp);
1051 /* deliver on this port */
1052 nskb = skb_clone(skb, GFP_ATOMIC);
1058 if (netif_rx(nskb) == NET_RX_SUCCESS) {
1059 u64_stats_update_begin(&secy_stats->syncp);
1060 secy_stats->stats.InPktsUntagged++;
1061 u64_stats_update_end(&secy_stats->syncp);
1070 static rx_handler_result_t macsec_handle_frame(struct sk_buff **pskb)
1072 struct sk_buff *skb = *pskb;
1073 struct net_device *dev = skb->dev;
1074 struct macsec_eth_header *hdr;
1075 struct macsec_secy *secy = NULL;
1076 struct macsec_rx_sc *rx_sc;
1077 struct macsec_rx_sa *rx_sa;
1078 struct macsec_rxh_data *rxd;
1079 struct macsec_dev *macsec;
1084 struct pcpu_rx_sc_stats *rxsc_stats;
1085 struct pcpu_secy_stats *secy_stats;
1089 if (skb_headroom(skb) < ETH_HLEN)
1092 hdr = macsec_ethhdr(skb);
1093 if (hdr->eth.h_proto != htons(ETH_P_MACSEC))
1094 return handle_not_macsec(skb);
1096 skb = skb_unshare(skb, GFP_ATOMIC);
1099 return RX_HANDLER_CONSUMED;
1101 pulled_sci = pskb_may_pull(skb, macsec_extra_len(true));
1103 if (!pskb_may_pull(skb, macsec_extra_len(false)))
1107 hdr = macsec_ethhdr(skb);
1109 /* Frames with a SecTAG that has the TCI E bit set but the C
1110 * bit clear are discarded, as this reserved encoding is used
1111 * to identify frames with a SecTAG that are not to be
1112 * delivered to the Controlled Port.
1114 if ((hdr->tci_an & (MACSEC_TCI_C | MACSEC_TCI_E)) == MACSEC_TCI_E)
1115 return RX_HANDLER_PASS;
1117 /* now, pull the extra length */
1118 if (hdr->tci_an & MACSEC_TCI_SC) {
1123 /* ethernet header is part of crypto processing */
1124 skb_push(skb, ETH_HLEN);
1126 macsec_skb_cb(skb)->has_sci = !!(hdr->tci_an & MACSEC_TCI_SC);
1127 macsec_skb_cb(skb)->assoc_num = hdr->tci_an & MACSEC_AN_MASK;
1128 sci = macsec_frame_sci(hdr, macsec_skb_cb(skb)->has_sci);
1131 rxd = macsec_data_rcu(skb->dev);
1133 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1134 struct macsec_rx_sc *sc = find_rx_sc(&macsec->secy, sci);
1136 sc = sc ? macsec_rxsc_get(sc) : NULL;
1139 secy = &macsec->secy;
1149 macsec = macsec_priv(dev);
1150 secy_stats = this_cpu_ptr(macsec->stats);
1151 rxsc_stats = this_cpu_ptr(rx_sc->stats);
1153 if (!macsec_validate_skb(skb, secy->icv_len, secy->xpn)) {
1154 u64_stats_update_begin(&secy_stats->syncp);
1155 secy_stats->stats.InPktsBadTag++;
1156 u64_stats_update_end(&secy_stats->syncp);
1160 rx_sa = macsec_rxsa_get(rx_sc->sa[macsec_skb_cb(skb)->assoc_num]);
1162 /* 10.6.1 if the SA is not in use */
1164 /* If validateFrames is Strict or the C bit in the
1165 * SecTAG is set, discard
1167 if (hdr->tci_an & MACSEC_TCI_C ||
1168 secy->validate_frames == MACSEC_VALIDATE_STRICT) {
1169 u64_stats_update_begin(&rxsc_stats->syncp);
1170 rxsc_stats->stats.InPktsNotUsingSA++;
1171 u64_stats_update_end(&rxsc_stats->syncp);
1175 /* not Strict, the frame (with the SecTAG and ICV
1176 * removed) is delivered to the Controlled Port.
1178 u64_stats_update_begin(&rxsc_stats->syncp);
1179 rxsc_stats->stats.InPktsUnusedSA++;
1180 u64_stats_update_end(&rxsc_stats->syncp);
1184 /* First, PN check to avoid decrypting obviously wrong packets */
1185 hdr_pn = ntohl(hdr->packet_number);
1186 if (secy->replay_protect) {
1189 spin_lock(&rx_sa->lock);
1190 late = rx_sa->next_pn_halves.lower >= secy->replay_window &&
1191 hdr_pn < (rx_sa->next_pn_halves.lower - secy->replay_window);
1194 late = late && pn_same_half(rx_sa->next_pn_halves.lower, hdr_pn);
1195 spin_unlock(&rx_sa->lock);
1198 u64_stats_update_begin(&rxsc_stats->syncp);
1199 rxsc_stats->stats.InPktsLate++;
1200 u64_stats_update_end(&rxsc_stats->syncp);
1205 macsec_skb_cb(skb)->rx_sa = rx_sa;
1207 /* Disabled && !changed text => skip validation */
1208 if (hdr->tci_an & MACSEC_TCI_C ||
1209 secy->validate_frames != MACSEC_VALIDATE_DISABLED)
1210 skb = macsec_decrypt(skb, dev, rx_sa, sci, secy);
1213 /* the decrypt callback needs the reference */
1214 if (PTR_ERR(skb) != -EINPROGRESS) {
1215 macsec_rxsa_put(rx_sa);
1216 macsec_rxsc_put(rx_sc);
1220 return RX_HANDLER_CONSUMED;
1223 if (!macsec_post_decrypt(skb, secy, hdr_pn))
1227 macsec_finalize_skb(skb, secy->icv_len,
1228 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
1229 macsec_reset_skb(skb, secy->netdev);
1232 macsec_rxsa_put(rx_sa);
1233 macsec_rxsc_put(rx_sc);
1237 ret = gro_cells_receive(&macsec->gro_cells, skb);
1238 if (ret == NET_RX_SUCCESS)
1241 macsec->secy.netdev->stats.rx_dropped++;
1246 return RX_HANDLER_CONSUMED;
1249 macsec_rxsa_put(rx_sa);
1251 macsec_rxsc_put(rx_sc);
1256 return RX_HANDLER_CONSUMED;
1259 /* 10.6.1 if the SC is not found */
1260 cbit = !!(hdr->tci_an & MACSEC_TCI_C);
1262 macsec_finalize_skb(skb, DEFAULT_ICV_LEN,
1263 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
1265 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1266 struct sk_buff *nskb;
1268 secy_stats = this_cpu_ptr(macsec->stats);
1270 /* If validateFrames is Strict or the C bit in the
1271 * SecTAG is set, discard
1274 macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) {
1275 u64_stats_update_begin(&secy_stats->syncp);
1276 secy_stats->stats.InPktsNoSCI++;
1277 u64_stats_update_end(&secy_stats->syncp);
1281 /* not strict, the frame (with the SecTAG and ICV
1282 * removed) is delivered to the Controlled Port.
1284 nskb = skb_clone(skb, GFP_ATOMIC);
1288 macsec_reset_skb(nskb, macsec->secy.netdev);
1290 ret = netif_rx(nskb);
1291 if (ret == NET_RX_SUCCESS) {
1292 u64_stats_update_begin(&secy_stats->syncp);
1293 secy_stats->stats.InPktsUnknownSCI++;
1294 u64_stats_update_end(&secy_stats->syncp);
1296 macsec->secy.netdev->stats.rx_dropped++;
1302 return RX_HANDLER_PASS;
1305 static struct crypto_aead *macsec_alloc_tfm(char *key, int key_len, int icv_len)
1307 struct crypto_aead *tfm;
1310 /* Pick a sync gcm(aes) cipher to ensure order is preserved. */
1311 tfm = crypto_alloc_aead("gcm(aes)", 0, CRYPTO_ALG_ASYNC);
1316 ret = crypto_aead_setkey(tfm, key, key_len);
1320 ret = crypto_aead_setauthsize(tfm, icv_len);
1326 crypto_free_aead(tfm);
1327 return ERR_PTR(ret);
1330 static int init_rx_sa(struct macsec_rx_sa *rx_sa, char *sak, int key_len,
1333 rx_sa->stats = alloc_percpu(struct macsec_rx_sa_stats);
1337 rx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len);
1338 if (IS_ERR(rx_sa->key.tfm)) {
1339 free_percpu(rx_sa->stats);
1340 return PTR_ERR(rx_sa->key.tfm);
1343 rx_sa->ssci = MACSEC_UNDEF_SSCI;
1344 rx_sa->active = false;
1346 refcount_set(&rx_sa->refcnt, 1);
1347 spin_lock_init(&rx_sa->lock);
1352 static void clear_rx_sa(struct macsec_rx_sa *rx_sa)
1354 rx_sa->active = false;
1356 macsec_rxsa_put(rx_sa);
1359 static void free_rx_sc(struct macsec_rx_sc *rx_sc)
1363 for (i = 0; i < MACSEC_NUM_AN; i++) {
1364 struct macsec_rx_sa *sa = rtnl_dereference(rx_sc->sa[i]);
1366 RCU_INIT_POINTER(rx_sc->sa[i], NULL);
1371 macsec_rxsc_put(rx_sc);
1374 static struct macsec_rx_sc *del_rx_sc(struct macsec_secy *secy, sci_t sci)
1376 struct macsec_rx_sc *rx_sc, __rcu **rx_scp;
1378 for (rx_scp = &secy->rx_sc, rx_sc = rtnl_dereference(*rx_scp);
1380 rx_scp = &rx_sc->next, rx_sc = rtnl_dereference(*rx_scp)) {
1381 if (rx_sc->sci == sci) {
1384 rcu_assign_pointer(*rx_scp, rx_sc->next);
1392 static struct macsec_rx_sc *create_rx_sc(struct net_device *dev, sci_t sci)
1394 struct macsec_rx_sc *rx_sc;
1395 struct macsec_dev *macsec;
1396 struct net_device *real_dev = macsec_priv(dev)->real_dev;
1397 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
1398 struct macsec_secy *secy;
1400 list_for_each_entry(macsec, &rxd->secys, secys) {
1401 if (find_rx_sc_rtnl(&macsec->secy, sci))
1402 return ERR_PTR(-EEXIST);
1405 rx_sc = kzalloc(sizeof(*rx_sc), GFP_KERNEL);
1407 return ERR_PTR(-ENOMEM);
1409 rx_sc->stats = netdev_alloc_pcpu_stats(struct pcpu_rx_sc_stats);
1410 if (!rx_sc->stats) {
1412 return ERR_PTR(-ENOMEM);
1416 rx_sc->active = true;
1417 refcount_set(&rx_sc->refcnt, 1);
1419 secy = &macsec_priv(dev)->secy;
1420 rcu_assign_pointer(rx_sc->next, secy->rx_sc);
1421 rcu_assign_pointer(secy->rx_sc, rx_sc);
1429 static int init_tx_sa(struct macsec_tx_sa *tx_sa, char *sak, int key_len,
1432 tx_sa->stats = alloc_percpu(struct macsec_tx_sa_stats);
1436 tx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len);
1437 if (IS_ERR(tx_sa->key.tfm)) {
1438 free_percpu(tx_sa->stats);
1439 return PTR_ERR(tx_sa->key.tfm);
1442 tx_sa->ssci = MACSEC_UNDEF_SSCI;
1443 tx_sa->active = false;
1444 refcount_set(&tx_sa->refcnt, 1);
1445 spin_lock_init(&tx_sa->lock);
1450 static void clear_tx_sa(struct macsec_tx_sa *tx_sa)
1452 tx_sa->active = false;
1454 macsec_txsa_put(tx_sa);
1457 static struct genl_family macsec_fam;
1459 static struct net_device *get_dev_from_nl(struct net *net,
1460 struct nlattr **attrs)
1462 int ifindex = nla_get_u32(attrs[MACSEC_ATTR_IFINDEX]);
1463 struct net_device *dev;
1465 dev = __dev_get_by_index(net, ifindex);
1467 return ERR_PTR(-ENODEV);
1469 if (!netif_is_macsec(dev))
1470 return ERR_PTR(-ENODEV);
1475 static enum macsec_offload nla_get_offload(const struct nlattr *nla)
1477 return (__force enum macsec_offload)nla_get_u8(nla);
1480 static sci_t nla_get_sci(const struct nlattr *nla)
1482 return (__force sci_t)nla_get_u64(nla);
1485 static int nla_put_sci(struct sk_buff *skb, int attrtype, sci_t value,
1488 return nla_put_u64_64bit(skb, attrtype, (__force u64)value, padattr);
1491 static ssci_t nla_get_ssci(const struct nlattr *nla)
1493 return (__force ssci_t)nla_get_u32(nla);
1496 static int nla_put_ssci(struct sk_buff *skb, int attrtype, ssci_t value)
1498 return nla_put_u32(skb, attrtype, (__force u64)value);
1501 static struct macsec_tx_sa *get_txsa_from_nl(struct net *net,
1502 struct nlattr **attrs,
1503 struct nlattr **tb_sa,
1504 struct net_device **devp,
1505 struct macsec_secy **secyp,
1506 struct macsec_tx_sc **scp,
1509 struct net_device *dev;
1510 struct macsec_secy *secy;
1511 struct macsec_tx_sc *tx_sc;
1512 struct macsec_tx_sa *tx_sa;
1514 if (!tb_sa[MACSEC_SA_ATTR_AN])
1515 return ERR_PTR(-EINVAL);
1517 *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1519 dev = get_dev_from_nl(net, attrs);
1521 return ERR_CAST(dev);
1523 if (*assoc_num >= MACSEC_NUM_AN)
1524 return ERR_PTR(-EINVAL);
1526 secy = &macsec_priv(dev)->secy;
1527 tx_sc = &secy->tx_sc;
1529 tx_sa = rtnl_dereference(tx_sc->sa[*assoc_num]);
1531 return ERR_PTR(-ENODEV);
1539 static struct macsec_rx_sc *get_rxsc_from_nl(struct net *net,
1540 struct nlattr **attrs,
1541 struct nlattr **tb_rxsc,
1542 struct net_device **devp,
1543 struct macsec_secy **secyp)
1545 struct net_device *dev;
1546 struct macsec_secy *secy;
1547 struct macsec_rx_sc *rx_sc;
1550 dev = get_dev_from_nl(net, attrs);
1552 return ERR_CAST(dev);
1554 secy = &macsec_priv(dev)->secy;
1556 if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI])
1557 return ERR_PTR(-EINVAL);
1559 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1560 rx_sc = find_rx_sc_rtnl(secy, sci);
1562 return ERR_PTR(-ENODEV);
1570 static struct macsec_rx_sa *get_rxsa_from_nl(struct net *net,
1571 struct nlattr **attrs,
1572 struct nlattr **tb_rxsc,
1573 struct nlattr **tb_sa,
1574 struct net_device **devp,
1575 struct macsec_secy **secyp,
1576 struct macsec_rx_sc **scp,
1579 struct macsec_rx_sc *rx_sc;
1580 struct macsec_rx_sa *rx_sa;
1582 if (!tb_sa[MACSEC_SA_ATTR_AN])
1583 return ERR_PTR(-EINVAL);
1585 *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1586 if (*assoc_num >= MACSEC_NUM_AN)
1587 return ERR_PTR(-EINVAL);
1589 rx_sc = get_rxsc_from_nl(net, attrs, tb_rxsc, devp, secyp);
1591 return ERR_CAST(rx_sc);
1593 rx_sa = rtnl_dereference(rx_sc->sa[*assoc_num]);
1595 return ERR_PTR(-ENODEV);
1601 static const struct nla_policy macsec_genl_policy[NUM_MACSEC_ATTR] = {
1602 [MACSEC_ATTR_IFINDEX] = { .type = NLA_U32 },
1603 [MACSEC_ATTR_RXSC_CONFIG] = { .type = NLA_NESTED },
1604 [MACSEC_ATTR_SA_CONFIG] = { .type = NLA_NESTED },
1605 [MACSEC_ATTR_OFFLOAD] = { .type = NLA_NESTED },
1608 static const struct nla_policy macsec_genl_rxsc_policy[NUM_MACSEC_RXSC_ATTR] = {
1609 [MACSEC_RXSC_ATTR_SCI] = { .type = NLA_U64 },
1610 [MACSEC_RXSC_ATTR_ACTIVE] = { .type = NLA_U8 },
1613 static const struct nla_policy macsec_genl_sa_policy[NUM_MACSEC_SA_ATTR] = {
1614 [MACSEC_SA_ATTR_AN] = { .type = NLA_U8 },
1615 [MACSEC_SA_ATTR_ACTIVE] = { .type = NLA_U8 },
1616 [MACSEC_SA_ATTR_PN] = NLA_POLICY_MIN_LEN(4),
1617 [MACSEC_SA_ATTR_KEYID] = { .type = NLA_BINARY,
1618 .len = MACSEC_KEYID_LEN, },
1619 [MACSEC_SA_ATTR_KEY] = { .type = NLA_BINARY,
1620 .len = MACSEC_MAX_KEY_LEN, },
1621 [MACSEC_SA_ATTR_SSCI] = { .type = NLA_U32 },
1622 [MACSEC_SA_ATTR_SALT] = { .type = NLA_BINARY,
1623 .len = MACSEC_SALT_LEN, },
1626 static const struct nla_policy macsec_genl_offload_policy[NUM_MACSEC_OFFLOAD_ATTR] = {
1627 [MACSEC_OFFLOAD_ATTR_TYPE] = { .type = NLA_U8 },
1630 /* Offloads an operation to a device driver */
1631 static int macsec_offload(int (* const func)(struct macsec_context *),
1632 struct macsec_context *ctx)
1636 if (unlikely(!func))
1639 if (ctx->offload == MACSEC_OFFLOAD_PHY)
1640 mutex_lock(&ctx->phydev->lock);
1642 /* Phase I: prepare. The drive should fail here if there are going to be
1643 * issues in the commit phase.
1645 ctx->prepare = true;
1650 /* Phase II: commit. This step cannot fail. */
1651 ctx->prepare = false;
1653 /* This should never happen: commit is not allowed to fail */
1655 WARN(1, "MACsec offloading commit failed (%d)\n", ret);
1658 if (ctx->offload == MACSEC_OFFLOAD_PHY)
1659 mutex_unlock(&ctx->phydev->lock);
1664 static int parse_sa_config(struct nlattr **attrs, struct nlattr **tb_sa)
1666 if (!attrs[MACSEC_ATTR_SA_CONFIG])
1669 if (nla_parse_nested_deprecated(tb_sa, MACSEC_SA_ATTR_MAX, attrs[MACSEC_ATTR_SA_CONFIG], macsec_genl_sa_policy, NULL))
1675 static int parse_rxsc_config(struct nlattr **attrs, struct nlattr **tb_rxsc)
1677 if (!attrs[MACSEC_ATTR_RXSC_CONFIG])
1680 if (nla_parse_nested_deprecated(tb_rxsc, MACSEC_RXSC_ATTR_MAX, attrs[MACSEC_ATTR_RXSC_CONFIG], macsec_genl_rxsc_policy, NULL))
1686 static bool validate_add_rxsa(struct nlattr **attrs)
1688 if (!attrs[MACSEC_SA_ATTR_AN] ||
1689 !attrs[MACSEC_SA_ATTR_KEY] ||
1690 !attrs[MACSEC_SA_ATTR_KEYID])
1693 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
1696 if (attrs[MACSEC_SA_ATTR_PN] &&
1697 *(u64 *)nla_data(attrs[MACSEC_SA_ATTR_PN]) == 0)
1700 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
1701 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
1705 if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN)
1711 static int macsec_add_rxsa(struct sk_buff *skb, struct genl_info *info)
1713 struct net_device *dev;
1714 struct nlattr **attrs = info->attrs;
1715 struct macsec_secy *secy;
1716 struct macsec_rx_sc *rx_sc;
1717 struct macsec_rx_sa *rx_sa;
1718 unsigned char assoc_num;
1720 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1721 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1724 if (!attrs[MACSEC_ATTR_IFINDEX])
1727 if (parse_sa_config(attrs, tb_sa))
1730 if (parse_rxsc_config(attrs, tb_rxsc))
1733 if (!validate_add_rxsa(tb_sa))
1737 rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy);
1738 if (IS_ERR(rx_sc)) {
1740 return PTR_ERR(rx_sc);
1743 assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1745 if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) {
1746 pr_notice("macsec: nl: add_rxsa: bad key length: %d != %d\n",
1747 nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len);
1752 pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
1753 if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
1754 pr_notice("macsec: nl: add_rxsa: bad pn length: %d != %d\n",
1755 nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
1761 if (!tb_sa[MACSEC_SA_ATTR_SSCI] || !tb_sa[MACSEC_SA_ATTR_SALT]) {
1766 if (nla_len(tb_sa[MACSEC_SA_ATTR_SALT]) != MACSEC_SALT_LEN) {
1767 pr_notice("macsec: nl: add_rxsa: bad salt length: %d != %d\n",
1768 nla_len(tb_sa[MACSEC_SA_ATTR_SALT]),
1769 MACSEC_SA_ATTR_SALT);
1775 rx_sa = rtnl_dereference(rx_sc->sa[assoc_num]);
1781 rx_sa = kmalloc(sizeof(*rx_sa), GFP_KERNEL);
1787 err = init_rx_sa(rx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
1788 secy->key_len, secy->icv_len);
1795 if (tb_sa[MACSEC_SA_ATTR_PN]) {
1796 spin_lock_bh(&rx_sa->lock);
1797 rx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
1798 spin_unlock_bh(&rx_sa->lock);
1801 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
1802 rx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
1806 /* If h/w offloading is available, propagate to the device */
1807 if (macsec_is_offloaded(netdev_priv(dev))) {
1808 const struct macsec_ops *ops;
1809 struct macsec_context ctx;
1811 ops = macsec_get_ops(netdev_priv(dev), &ctx);
1817 ctx.sa.assoc_num = assoc_num;
1818 ctx.sa.rx_sa = rx_sa;
1820 memcpy(ctx.sa.key, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
1823 err = macsec_offload(ops->mdo_add_rxsa, &ctx);
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);
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 rx_sc = create_rx_sc(dev, sci);
1891 if (IS_ERR(rx_sc)) {
1893 return PTR_ERR(rx_sc);
1896 was_active = rx_sc->active;
1897 if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE])
1898 rx_sc->active = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]);
1900 if (macsec_is_offloaded(netdev_priv(dev))) {
1901 const struct macsec_ops *ops;
1902 struct macsec_context ctx;
1904 ops = macsec_get_ops(netdev_priv(dev), &ctx);
1913 ret = macsec_offload(ops->mdo_add_rxsc, &ctx);
1923 rx_sc->active = was_active;
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_u32(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]),
2011 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);
2071 tx_sa->ssci = nla_get_ssci(tb_sa[MACSEC_SA_ATTR_SSCI]);
2072 nla_memcpy(tx_sa->key.salt.bytes, tb_sa[MACSEC_SA_ATTR_SALT],
2076 nla_memcpy(tx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN);
2077 rcu_assign_pointer(tx_sc->sa[assoc_num], tx_sa);
2084 secy->operational = was_operational;
2090 static int macsec_del_rxsa(struct sk_buff *skb, struct genl_info *info)
2092 struct nlattr **attrs = info->attrs;
2093 struct net_device *dev;
2094 struct macsec_secy *secy;
2095 struct macsec_rx_sc *rx_sc;
2096 struct macsec_rx_sa *rx_sa;
2098 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2099 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2102 if (!attrs[MACSEC_ATTR_IFINDEX])
2105 if (parse_sa_config(attrs, tb_sa))
2108 if (parse_rxsc_config(attrs, tb_rxsc))
2112 rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa,
2113 &dev, &secy, &rx_sc, &assoc_num);
2114 if (IS_ERR(rx_sa)) {
2116 return PTR_ERR(rx_sa);
2119 if (rx_sa->active) {
2124 /* If h/w offloading is available, propagate to the device */
2125 if (macsec_is_offloaded(netdev_priv(dev))) {
2126 const struct macsec_ops *ops;
2127 struct macsec_context ctx;
2129 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2135 ctx.sa.assoc_num = assoc_num;
2136 ctx.sa.rx_sa = rx_sa;
2139 ret = macsec_offload(ops->mdo_del_rxsa, &ctx);
2144 RCU_INIT_POINTER(rx_sc->sa[assoc_num], NULL);
2156 static int macsec_del_rxsc(struct sk_buff *skb, struct genl_info *info)
2158 struct nlattr **attrs = info->attrs;
2159 struct net_device *dev;
2160 struct macsec_secy *secy;
2161 struct macsec_rx_sc *rx_sc;
2163 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2166 if (!attrs[MACSEC_ATTR_IFINDEX])
2169 if (parse_rxsc_config(attrs, tb_rxsc))
2172 if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI])
2176 dev = get_dev_from_nl(genl_info_net(info), info->attrs);
2179 return PTR_ERR(dev);
2182 secy = &macsec_priv(dev)->secy;
2183 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
2185 rx_sc = del_rx_sc(secy, sci);
2191 /* If h/w offloading is available, propagate to the device */
2192 if (macsec_is_offloaded(netdev_priv(dev))) {
2193 const struct macsec_ops *ops;
2194 struct macsec_context ctx;
2196 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2204 ret = macsec_offload(ops->mdo_del_rxsc, &ctx);
2219 static int macsec_del_txsa(struct sk_buff *skb, struct genl_info *info)
2221 struct nlattr **attrs = info->attrs;
2222 struct net_device *dev;
2223 struct macsec_secy *secy;
2224 struct macsec_tx_sc *tx_sc;
2225 struct macsec_tx_sa *tx_sa;
2227 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2230 if (!attrs[MACSEC_ATTR_IFINDEX])
2233 if (parse_sa_config(attrs, tb_sa))
2237 tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa,
2238 &dev, &secy, &tx_sc, &assoc_num);
2239 if (IS_ERR(tx_sa)) {
2241 return PTR_ERR(tx_sa);
2244 if (tx_sa->active) {
2249 /* If h/w offloading is available, propagate to the device */
2250 if (macsec_is_offloaded(netdev_priv(dev))) {
2251 const struct macsec_ops *ops;
2252 struct macsec_context ctx;
2254 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2260 ctx.sa.assoc_num = assoc_num;
2261 ctx.sa.tx_sa = tx_sa;
2264 ret = macsec_offload(ops->mdo_del_txsa, &ctx);
2269 RCU_INIT_POINTER(tx_sc->sa[assoc_num], NULL);
2281 static bool validate_upd_sa(struct nlattr **attrs)
2283 if (!attrs[MACSEC_SA_ATTR_AN] ||
2284 attrs[MACSEC_SA_ATTR_KEY] ||
2285 attrs[MACSEC_SA_ATTR_KEYID] ||
2286 attrs[MACSEC_SA_ATTR_SSCI] ||
2287 attrs[MACSEC_SA_ATTR_SALT])
2290 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
2293 if (attrs[MACSEC_SA_ATTR_PN] && nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0)
2296 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
2297 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
2304 static int macsec_upd_txsa(struct sk_buff *skb, struct genl_info *info)
2306 struct nlattr **attrs = info->attrs;
2307 struct net_device *dev;
2308 struct macsec_secy *secy;
2309 struct macsec_tx_sc *tx_sc;
2310 struct macsec_tx_sa *tx_sa;
2312 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2313 bool was_operational, was_active;
2319 if (!attrs[MACSEC_ATTR_IFINDEX])
2322 if (parse_sa_config(attrs, tb_sa))
2325 if (!validate_upd_sa(tb_sa))
2329 tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa,
2330 &dev, &secy, &tx_sc, &assoc_num);
2331 if (IS_ERR(tx_sa)) {
2333 return PTR_ERR(tx_sa);
2336 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2339 pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
2340 if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
2341 pr_notice("macsec: nl: upd_txsa: bad pn length: %d != %d\n",
2342 nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
2347 spin_lock_bh(&tx_sa->lock);
2348 prev_pn = tx_sa->next_pn_halves;
2349 tx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
2350 spin_unlock_bh(&tx_sa->lock);
2353 was_active = tx_sa->active;
2354 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2355 tx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2357 was_operational = secy->operational;
2358 if (assoc_num == tx_sc->encoding_sa)
2359 secy->operational = tx_sa->active;
2361 /* If h/w offloading is available, propagate to the device */
2362 if (macsec_is_offloaded(netdev_priv(dev))) {
2363 const struct macsec_ops *ops;
2364 struct macsec_context ctx;
2366 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2372 ctx.sa.assoc_num = assoc_num;
2373 ctx.sa.tx_sa = tx_sa;
2376 ret = macsec_offload(ops->mdo_upd_txsa, &ctx);
2386 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2387 spin_lock_bh(&tx_sa->lock);
2388 tx_sa->next_pn_halves = prev_pn;
2389 spin_unlock_bh(&tx_sa->lock);
2391 tx_sa->active = was_active;
2392 secy->operational = was_operational;
2397 static int macsec_upd_rxsa(struct sk_buff *skb, struct genl_info *info)
2399 struct nlattr **attrs = info->attrs;
2400 struct net_device *dev;
2401 struct macsec_secy *secy;
2402 struct macsec_rx_sc *rx_sc;
2403 struct macsec_rx_sa *rx_sa;
2405 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2406 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2413 if (!attrs[MACSEC_ATTR_IFINDEX])
2416 if (parse_rxsc_config(attrs, tb_rxsc))
2419 if (parse_sa_config(attrs, tb_sa))
2422 if (!validate_upd_sa(tb_sa))
2426 rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa,
2427 &dev, &secy, &rx_sc, &assoc_num);
2428 if (IS_ERR(rx_sa)) {
2430 return PTR_ERR(rx_sa);
2433 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2436 pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
2437 if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
2438 pr_notice("macsec: nl: upd_rxsa: bad pn length: %d != %d\n",
2439 nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
2444 spin_lock_bh(&rx_sa->lock);
2445 prev_pn = rx_sa->next_pn_halves;
2446 rx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
2447 spin_unlock_bh(&rx_sa->lock);
2450 was_active = rx_sa->active;
2451 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2452 rx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2454 /* If h/w offloading is available, propagate to the device */
2455 if (macsec_is_offloaded(netdev_priv(dev))) {
2456 const struct macsec_ops *ops;
2457 struct macsec_context ctx;
2459 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2465 ctx.sa.assoc_num = assoc_num;
2466 ctx.sa.rx_sa = rx_sa;
2469 ret = macsec_offload(ops->mdo_upd_rxsa, &ctx);
2478 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2479 spin_lock_bh(&rx_sa->lock);
2480 rx_sa->next_pn_halves = prev_pn;
2481 spin_unlock_bh(&rx_sa->lock);
2483 rx_sa->active = was_active;
2488 static int macsec_upd_rxsc(struct sk_buff *skb, struct genl_info *info)
2490 struct nlattr **attrs = info->attrs;
2491 struct net_device *dev;
2492 struct macsec_secy *secy;
2493 struct macsec_rx_sc *rx_sc;
2494 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2495 unsigned int prev_n_rx_sc;
2499 if (!attrs[MACSEC_ATTR_IFINDEX])
2502 if (parse_rxsc_config(attrs, tb_rxsc))
2505 if (!validate_add_rxsc(tb_rxsc))
2509 rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy);
2510 if (IS_ERR(rx_sc)) {
2512 return PTR_ERR(rx_sc);
2515 was_active = rx_sc->active;
2516 prev_n_rx_sc = secy->n_rx_sc;
2517 if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]) {
2518 bool new = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]);
2520 if (rx_sc->active != new)
2521 secy->n_rx_sc += new ? 1 : -1;
2523 rx_sc->active = new;
2526 /* If h/w offloading is available, propagate to the device */
2527 if (macsec_is_offloaded(netdev_priv(dev))) {
2528 const struct macsec_ops *ops;
2529 struct macsec_context ctx;
2531 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2540 ret = macsec_offload(ops->mdo_upd_rxsc, &ctx);
2550 secy->n_rx_sc = prev_n_rx_sc;
2551 rx_sc->active = was_active;
2556 static bool macsec_is_configured(struct macsec_dev *macsec)
2558 struct macsec_secy *secy = &macsec->secy;
2559 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
2562 if (secy->n_rx_sc > 0)
2565 for (i = 0; i < MACSEC_NUM_AN; i++)
2572 static int macsec_upd_offload(struct sk_buff *skb, struct genl_info *info)
2574 struct nlattr *tb_offload[MACSEC_OFFLOAD_ATTR_MAX + 1];
2575 enum macsec_offload offload, prev_offload;
2576 int (*func)(struct macsec_context *ctx);
2577 struct nlattr **attrs = info->attrs;
2578 struct net_device *dev;
2579 const struct macsec_ops *ops;
2580 struct macsec_context ctx;
2581 struct macsec_dev *macsec;
2584 if (!attrs[MACSEC_ATTR_IFINDEX])
2587 if (!attrs[MACSEC_ATTR_OFFLOAD])
2590 if (nla_parse_nested_deprecated(tb_offload, MACSEC_OFFLOAD_ATTR_MAX,
2591 attrs[MACSEC_ATTR_OFFLOAD],
2592 macsec_genl_offload_policy, NULL))
2595 dev = get_dev_from_nl(genl_info_net(info), attrs);
2597 return PTR_ERR(dev);
2598 macsec = macsec_priv(dev);
2600 if (!tb_offload[MACSEC_OFFLOAD_ATTR_TYPE])
2603 offload = nla_get_u8(tb_offload[MACSEC_OFFLOAD_ATTR_TYPE]);
2604 if (macsec->offload == offload)
2607 /* Check if the offloading mode is supported by the underlying layers */
2608 if (offload != MACSEC_OFFLOAD_OFF &&
2609 !macsec_check_offload(offload, macsec))
2612 /* Check if the net device is busy. */
2613 if (netif_running(dev))
2618 prev_offload = macsec->offload;
2619 macsec->offload = offload;
2621 /* Check if the device already has rules configured: we do not support
2624 if (macsec_is_configured(macsec)) {
2629 ops = __macsec_get_ops(offload == MACSEC_OFFLOAD_OFF ? prev_offload : offload,
2636 if (prev_offload == MACSEC_OFFLOAD_OFF)
2637 func = ops->mdo_add_secy;
2639 func = ops->mdo_del_secy;
2641 ctx.secy = &macsec->secy;
2642 ret = macsec_offload(func, &ctx);
2646 /* Force features update, since they are different for SW MACSec and
2647 * HW offloading cases.
2649 netdev_update_features(dev);
2655 macsec->offload = prev_offload;
2661 static void get_tx_sa_stats(struct net_device *dev, int an,
2662 struct macsec_tx_sa *tx_sa,
2663 struct macsec_tx_sa_stats *sum)
2665 struct macsec_dev *macsec = macsec_priv(dev);
2668 /* If h/w offloading is available, propagate to the device */
2669 if (macsec_is_offloaded(macsec)) {
2670 const struct macsec_ops *ops;
2671 struct macsec_context ctx;
2673 ops = macsec_get_ops(macsec, &ctx);
2675 ctx.sa.assoc_num = an;
2676 ctx.sa.tx_sa = tx_sa;
2677 ctx.stats.tx_sa_stats = sum;
2678 ctx.secy = &macsec_priv(dev)->secy;
2679 macsec_offload(ops->mdo_get_tx_sa_stats, &ctx);
2684 for_each_possible_cpu(cpu) {
2685 const struct macsec_tx_sa_stats *stats =
2686 per_cpu_ptr(tx_sa->stats, cpu);
2688 sum->OutPktsProtected += stats->OutPktsProtected;
2689 sum->OutPktsEncrypted += stats->OutPktsEncrypted;
2693 static int copy_tx_sa_stats(struct sk_buff *skb, struct macsec_tx_sa_stats *sum)
2695 if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_PROTECTED,
2696 sum->OutPktsProtected) ||
2697 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_ENCRYPTED,
2698 sum->OutPktsEncrypted))
2704 static void get_rx_sa_stats(struct net_device *dev,
2705 struct macsec_rx_sc *rx_sc, int an,
2706 struct macsec_rx_sa *rx_sa,
2707 struct macsec_rx_sa_stats *sum)
2709 struct macsec_dev *macsec = macsec_priv(dev);
2712 /* If h/w offloading is available, propagate to the device */
2713 if (macsec_is_offloaded(macsec)) {
2714 const struct macsec_ops *ops;
2715 struct macsec_context ctx;
2717 ops = macsec_get_ops(macsec, &ctx);
2719 ctx.sa.assoc_num = an;
2720 ctx.sa.rx_sa = rx_sa;
2721 ctx.stats.rx_sa_stats = sum;
2722 ctx.secy = &macsec_priv(dev)->secy;
2724 macsec_offload(ops->mdo_get_rx_sa_stats, &ctx);
2729 for_each_possible_cpu(cpu) {
2730 const struct macsec_rx_sa_stats *stats =
2731 per_cpu_ptr(rx_sa->stats, cpu);
2733 sum->InPktsOK += stats->InPktsOK;
2734 sum->InPktsInvalid += stats->InPktsInvalid;
2735 sum->InPktsNotValid += stats->InPktsNotValid;
2736 sum->InPktsNotUsingSA += stats->InPktsNotUsingSA;
2737 sum->InPktsUnusedSA += stats->InPktsUnusedSA;
2741 static int copy_rx_sa_stats(struct sk_buff *skb,
2742 struct macsec_rx_sa_stats *sum)
2744 if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_OK, sum->InPktsOK) ||
2745 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_INVALID,
2746 sum->InPktsInvalid) ||
2747 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_VALID,
2748 sum->InPktsNotValid) ||
2749 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_USING_SA,
2750 sum->InPktsNotUsingSA) ||
2751 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_UNUSED_SA,
2752 sum->InPktsUnusedSA))
2758 static void get_rx_sc_stats(struct net_device *dev,
2759 struct macsec_rx_sc *rx_sc,
2760 struct macsec_rx_sc_stats *sum)
2762 struct macsec_dev *macsec = macsec_priv(dev);
2765 /* If h/w offloading is available, propagate to the device */
2766 if (macsec_is_offloaded(macsec)) {
2767 const struct macsec_ops *ops;
2768 struct macsec_context ctx;
2770 ops = macsec_get_ops(macsec, &ctx);
2772 ctx.stats.rx_sc_stats = sum;
2773 ctx.secy = &macsec_priv(dev)->secy;
2775 macsec_offload(ops->mdo_get_rx_sc_stats, &ctx);
2780 for_each_possible_cpu(cpu) {
2781 const struct pcpu_rx_sc_stats *stats;
2782 struct macsec_rx_sc_stats tmp;
2785 stats = per_cpu_ptr(rx_sc->stats, cpu);
2787 start = u64_stats_fetch_begin_irq(&stats->syncp);
2788 memcpy(&tmp, &stats->stats, sizeof(tmp));
2789 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2791 sum->InOctetsValidated += tmp.InOctetsValidated;
2792 sum->InOctetsDecrypted += tmp.InOctetsDecrypted;
2793 sum->InPktsUnchecked += tmp.InPktsUnchecked;
2794 sum->InPktsDelayed += tmp.InPktsDelayed;
2795 sum->InPktsOK += tmp.InPktsOK;
2796 sum->InPktsInvalid += tmp.InPktsInvalid;
2797 sum->InPktsLate += tmp.InPktsLate;
2798 sum->InPktsNotValid += tmp.InPktsNotValid;
2799 sum->InPktsNotUsingSA += tmp.InPktsNotUsingSA;
2800 sum->InPktsUnusedSA += tmp.InPktsUnusedSA;
2804 static int copy_rx_sc_stats(struct sk_buff *skb, struct macsec_rx_sc_stats *sum)
2806 if (nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_VALIDATED,
2807 sum->InOctetsValidated,
2808 MACSEC_RXSC_STATS_ATTR_PAD) ||
2809 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_DECRYPTED,
2810 sum->InOctetsDecrypted,
2811 MACSEC_RXSC_STATS_ATTR_PAD) ||
2812 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNCHECKED,
2813 sum->InPktsUnchecked,
2814 MACSEC_RXSC_STATS_ATTR_PAD) ||
2815 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_DELAYED,
2817 MACSEC_RXSC_STATS_ATTR_PAD) ||
2818 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_OK,
2820 MACSEC_RXSC_STATS_ATTR_PAD) ||
2821 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_INVALID,
2823 MACSEC_RXSC_STATS_ATTR_PAD) ||
2824 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_LATE,
2826 MACSEC_RXSC_STATS_ATTR_PAD) ||
2827 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_VALID,
2828 sum->InPktsNotValid,
2829 MACSEC_RXSC_STATS_ATTR_PAD) ||
2830 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_USING_SA,
2831 sum->InPktsNotUsingSA,
2832 MACSEC_RXSC_STATS_ATTR_PAD) ||
2833 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNUSED_SA,
2834 sum->InPktsUnusedSA,
2835 MACSEC_RXSC_STATS_ATTR_PAD))
2841 static void get_tx_sc_stats(struct net_device *dev,
2842 struct macsec_tx_sc_stats *sum)
2844 struct macsec_dev *macsec = macsec_priv(dev);
2847 /* If h/w offloading is available, propagate to the device */
2848 if (macsec_is_offloaded(macsec)) {
2849 const struct macsec_ops *ops;
2850 struct macsec_context ctx;
2852 ops = macsec_get_ops(macsec, &ctx);
2854 ctx.stats.tx_sc_stats = sum;
2855 ctx.secy = &macsec_priv(dev)->secy;
2856 macsec_offload(ops->mdo_get_tx_sc_stats, &ctx);
2861 for_each_possible_cpu(cpu) {
2862 const struct pcpu_tx_sc_stats *stats;
2863 struct macsec_tx_sc_stats tmp;
2866 stats = per_cpu_ptr(macsec_priv(dev)->secy.tx_sc.stats, cpu);
2868 start = u64_stats_fetch_begin_irq(&stats->syncp);
2869 memcpy(&tmp, &stats->stats, sizeof(tmp));
2870 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2872 sum->OutPktsProtected += tmp.OutPktsProtected;
2873 sum->OutPktsEncrypted += tmp.OutPktsEncrypted;
2874 sum->OutOctetsProtected += tmp.OutOctetsProtected;
2875 sum->OutOctetsEncrypted += tmp.OutOctetsEncrypted;
2879 static int copy_tx_sc_stats(struct sk_buff *skb, struct macsec_tx_sc_stats *sum)
2881 if (nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_PROTECTED,
2882 sum->OutPktsProtected,
2883 MACSEC_TXSC_STATS_ATTR_PAD) ||
2884 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_ENCRYPTED,
2885 sum->OutPktsEncrypted,
2886 MACSEC_TXSC_STATS_ATTR_PAD) ||
2887 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_PROTECTED,
2888 sum->OutOctetsProtected,
2889 MACSEC_TXSC_STATS_ATTR_PAD) ||
2890 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_ENCRYPTED,
2891 sum->OutOctetsEncrypted,
2892 MACSEC_TXSC_STATS_ATTR_PAD))
2898 static void get_secy_stats(struct net_device *dev, struct macsec_dev_stats *sum)
2900 struct macsec_dev *macsec = macsec_priv(dev);
2903 /* If h/w offloading is available, propagate to the device */
2904 if (macsec_is_offloaded(macsec)) {
2905 const struct macsec_ops *ops;
2906 struct macsec_context ctx;
2908 ops = macsec_get_ops(macsec, &ctx);
2910 ctx.stats.dev_stats = sum;
2911 ctx.secy = &macsec_priv(dev)->secy;
2912 macsec_offload(ops->mdo_get_dev_stats, &ctx);
2917 for_each_possible_cpu(cpu) {
2918 const struct pcpu_secy_stats *stats;
2919 struct macsec_dev_stats tmp;
2922 stats = per_cpu_ptr(macsec_priv(dev)->stats, cpu);
2924 start = u64_stats_fetch_begin_irq(&stats->syncp);
2925 memcpy(&tmp, &stats->stats, sizeof(tmp));
2926 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2928 sum->OutPktsUntagged += tmp.OutPktsUntagged;
2929 sum->InPktsUntagged += tmp.InPktsUntagged;
2930 sum->OutPktsTooLong += tmp.OutPktsTooLong;
2931 sum->InPktsNoTag += tmp.InPktsNoTag;
2932 sum->InPktsBadTag += tmp.InPktsBadTag;
2933 sum->InPktsUnknownSCI += tmp.InPktsUnknownSCI;
2934 sum->InPktsNoSCI += tmp.InPktsNoSCI;
2935 sum->InPktsOverrun += tmp.InPktsOverrun;
2939 static int copy_secy_stats(struct sk_buff *skb, struct macsec_dev_stats *sum)
2941 if (nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_UNTAGGED,
2942 sum->OutPktsUntagged,
2943 MACSEC_SECY_STATS_ATTR_PAD) ||
2944 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNTAGGED,
2945 sum->InPktsUntagged,
2946 MACSEC_SECY_STATS_ATTR_PAD) ||
2947 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_TOO_LONG,
2948 sum->OutPktsTooLong,
2949 MACSEC_SECY_STATS_ATTR_PAD) ||
2950 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_TAG,
2952 MACSEC_SECY_STATS_ATTR_PAD) ||
2953 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_BAD_TAG,
2955 MACSEC_SECY_STATS_ATTR_PAD) ||
2956 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNKNOWN_SCI,
2957 sum->InPktsUnknownSCI,
2958 MACSEC_SECY_STATS_ATTR_PAD) ||
2959 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_SCI,
2961 MACSEC_SECY_STATS_ATTR_PAD) ||
2962 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_OVERRUN,
2964 MACSEC_SECY_STATS_ATTR_PAD))
2970 static int nla_put_secy(struct macsec_secy *secy, struct sk_buff *skb)
2972 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
2973 struct nlattr *secy_nest = nla_nest_start_noflag(skb,
2980 switch (secy->key_len) {
2981 case MACSEC_GCM_AES_128_SAK_LEN:
2982 csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_128 : MACSEC_DEFAULT_CIPHER_ID;
2984 case MACSEC_GCM_AES_256_SAK_LEN:
2985 csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_256 : MACSEC_CIPHER_ID_GCM_AES_256;
2991 if (nla_put_sci(skb, MACSEC_SECY_ATTR_SCI, secy->sci,
2992 MACSEC_SECY_ATTR_PAD) ||
2993 nla_put_u64_64bit(skb, MACSEC_SECY_ATTR_CIPHER_SUITE,
2994 csid, MACSEC_SECY_ATTR_PAD) ||
2995 nla_put_u8(skb, MACSEC_SECY_ATTR_ICV_LEN, secy->icv_len) ||
2996 nla_put_u8(skb, MACSEC_SECY_ATTR_OPER, secy->operational) ||
2997 nla_put_u8(skb, MACSEC_SECY_ATTR_PROTECT, secy->protect_frames) ||
2998 nla_put_u8(skb, MACSEC_SECY_ATTR_REPLAY, secy->replay_protect) ||
2999 nla_put_u8(skb, MACSEC_SECY_ATTR_VALIDATE, secy->validate_frames) ||
3000 nla_put_u8(skb, MACSEC_SECY_ATTR_ENCRYPT, tx_sc->encrypt) ||
3001 nla_put_u8(skb, MACSEC_SECY_ATTR_INC_SCI, tx_sc->send_sci) ||
3002 nla_put_u8(skb, MACSEC_SECY_ATTR_ES, tx_sc->end_station) ||
3003 nla_put_u8(skb, MACSEC_SECY_ATTR_SCB, tx_sc->scb) ||
3004 nla_put_u8(skb, MACSEC_SECY_ATTR_ENCODING_SA, tx_sc->encoding_sa))
3007 if (secy->replay_protect) {
3008 if (nla_put_u32(skb, MACSEC_SECY_ATTR_WINDOW, secy->replay_window))
3012 nla_nest_end(skb, secy_nest);
3016 nla_nest_cancel(skb, secy_nest);
3020 static noinline_for_stack int
3021 dump_secy(struct macsec_secy *secy, struct net_device *dev,
3022 struct sk_buff *skb, struct netlink_callback *cb)
3024 struct macsec_tx_sc_stats tx_sc_stats = {0, };
3025 struct macsec_tx_sa_stats tx_sa_stats = {0, };
3026 struct macsec_rx_sc_stats rx_sc_stats = {0, };
3027 struct macsec_rx_sa_stats rx_sa_stats = {0, };
3028 struct macsec_dev *macsec = netdev_priv(dev);
3029 struct macsec_dev_stats dev_stats = {0, };
3030 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
3031 struct nlattr *txsa_list, *rxsc_list;
3032 struct macsec_rx_sc *rx_sc;
3033 struct nlattr *attr;
3037 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
3038 &macsec_fam, NLM_F_MULTI, MACSEC_CMD_GET_TXSC);
3042 genl_dump_check_consistent(cb, hdr);
3044 if (nla_put_u32(skb, MACSEC_ATTR_IFINDEX, dev->ifindex))
3045 goto nla_put_failure;
3047 attr = nla_nest_start_noflag(skb, MACSEC_ATTR_OFFLOAD);
3049 goto nla_put_failure;
3050 if (nla_put_u8(skb, MACSEC_OFFLOAD_ATTR_TYPE, macsec->offload))
3051 goto nla_put_failure;
3052 nla_nest_end(skb, attr);
3054 if (nla_put_secy(secy, skb))
3055 goto nla_put_failure;
3057 attr = nla_nest_start_noflag(skb, MACSEC_ATTR_TXSC_STATS);
3059 goto nla_put_failure;
3061 get_tx_sc_stats(dev, &tx_sc_stats);
3062 if (copy_tx_sc_stats(skb, &tx_sc_stats)) {
3063 nla_nest_cancel(skb, attr);
3064 goto nla_put_failure;
3066 nla_nest_end(skb, attr);
3068 attr = nla_nest_start_noflag(skb, MACSEC_ATTR_SECY_STATS);
3070 goto nla_put_failure;
3071 get_secy_stats(dev, &dev_stats);
3072 if (copy_secy_stats(skb, &dev_stats)) {
3073 nla_nest_cancel(skb, attr);
3074 goto nla_put_failure;
3076 nla_nest_end(skb, attr);
3078 txsa_list = nla_nest_start_noflag(skb, MACSEC_ATTR_TXSA_LIST);
3080 goto nla_put_failure;
3081 for (i = 0, j = 1; i < MACSEC_NUM_AN; i++) {
3082 struct macsec_tx_sa *tx_sa = rtnl_dereference(tx_sc->sa[i]);
3083 struct nlattr *txsa_nest;
3090 txsa_nest = nla_nest_start_noflag(skb, j++);
3092 nla_nest_cancel(skb, txsa_list);
3093 goto nla_put_failure;
3096 attr = nla_nest_start_noflag(skb, MACSEC_SA_ATTR_STATS);
3098 nla_nest_cancel(skb, txsa_nest);
3099 nla_nest_cancel(skb, txsa_list);
3100 goto nla_put_failure;
3102 memset(&tx_sa_stats, 0, sizeof(tx_sa_stats));
3103 get_tx_sa_stats(dev, i, tx_sa, &tx_sa_stats);
3104 if (copy_tx_sa_stats(skb, &tx_sa_stats)) {
3105 nla_nest_cancel(skb, attr);
3106 nla_nest_cancel(skb, txsa_nest);
3107 nla_nest_cancel(skb, txsa_list);
3108 goto nla_put_failure;
3110 nla_nest_end(skb, attr);
3113 pn = tx_sa->next_pn;
3114 pn_len = MACSEC_XPN_PN_LEN;
3116 pn = tx_sa->next_pn_halves.lower;
3117 pn_len = MACSEC_DEFAULT_PN_LEN;
3120 if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) ||
3121 nla_put(skb, MACSEC_SA_ATTR_PN, pn_len, &pn) ||
3122 nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, tx_sa->key.id) ||
3123 (secy->xpn && nla_put_ssci(skb, MACSEC_SA_ATTR_SSCI, tx_sa->ssci)) ||
3124 nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, tx_sa->active)) {
3125 nla_nest_cancel(skb, txsa_nest);
3126 nla_nest_cancel(skb, txsa_list);
3127 goto nla_put_failure;
3130 nla_nest_end(skb, txsa_nest);
3132 nla_nest_end(skb, txsa_list);
3134 rxsc_list = nla_nest_start_noflag(skb, MACSEC_ATTR_RXSC_LIST);
3136 goto nla_put_failure;
3139 for_each_rxsc_rtnl(secy, rx_sc) {
3141 struct nlattr *rxsa_list;
3142 struct nlattr *rxsc_nest = nla_nest_start_noflag(skb, j++);
3145 nla_nest_cancel(skb, rxsc_list);
3146 goto nla_put_failure;
3149 if (nla_put_u8(skb, MACSEC_RXSC_ATTR_ACTIVE, rx_sc->active) ||
3150 nla_put_sci(skb, MACSEC_RXSC_ATTR_SCI, rx_sc->sci,
3151 MACSEC_RXSC_ATTR_PAD)) {
3152 nla_nest_cancel(skb, rxsc_nest);
3153 nla_nest_cancel(skb, rxsc_list);
3154 goto nla_put_failure;
3157 attr = nla_nest_start_noflag(skb, MACSEC_RXSC_ATTR_STATS);
3159 nla_nest_cancel(skb, rxsc_nest);
3160 nla_nest_cancel(skb, rxsc_list);
3161 goto nla_put_failure;
3163 memset(&rx_sc_stats, 0, sizeof(rx_sc_stats));
3164 get_rx_sc_stats(dev, rx_sc, &rx_sc_stats);
3165 if (copy_rx_sc_stats(skb, &rx_sc_stats)) {
3166 nla_nest_cancel(skb, attr);
3167 nla_nest_cancel(skb, rxsc_nest);
3168 nla_nest_cancel(skb, rxsc_list);
3169 goto nla_put_failure;
3171 nla_nest_end(skb, attr);
3173 rxsa_list = nla_nest_start_noflag(skb,
3174 MACSEC_RXSC_ATTR_SA_LIST);
3176 nla_nest_cancel(skb, rxsc_nest);
3177 nla_nest_cancel(skb, rxsc_list);
3178 goto nla_put_failure;
3181 for (i = 0, k = 1; i < MACSEC_NUM_AN; i++) {
3182 struct macsec_rx_sa *rx_sa = rtnl_dereference(rx_sc->sa[i]);
3183 struct nlattr *rxsa_nest;
3190 rxsa_nest = nla_nest_start_noflag(skb, k++);
3192 nla_nest_cancel(skb, rxsa_list);
3193 nla_nest_cancel(skb, rxsc_nest);
3194 nla_nest_cancel(skb, rxsc_list);
3195 goto nla_put_failure;
3198 attr = nla_nest_start_noflag(skb,
3199 MACSEC_SA_ATTR_STATS);
3201 nla_nest_cancel(skb, rxsa_list);
3202 nla_nest_cancel(skb, rxsc_nest);
3203 nla_nest_cancel(skb, rxsc_list);
3204 goto nla_put_failure;
3206 memset(&rx_sa_stats, 0, sizeof(rx_sa_stats));
3207 get_rx_sa_stats(dev, rx_sc, i, rx_sa, &rx_sa_stats);
3208 if (copy_rx_sa_stats(skb, &rx_sa_stats)) {
3209 nla_nest_cancel(skb, attr);
3210 nla_nest_cancel(skb, rxsa_list);
3211 nla_nest_cancel(skb, rxsc_nest);
3212 nla_nest_cancel(skb, rxsc_list);
3213 goto nla_put_failure;
3215 nla_nest_end(skb, attr);
3218 pn = rx_sa->next_pn;
3219 pn_len = MACSEC_XPN_PN_LEN;
3221 pn = rx_sa->next_pn_halves.lower;
3222 pn_len = MACSEC_DEFAULT_PN_LEN;
3225 if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) ||
3226 nla_put(skb, MACSEC_SA_ATTR_PN, pn_len, &pn) ||
3227 nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, rx_sa->key.id) ||
3228 (secy->xpn && nla_put_ssci(skb, MACSEC_SA_ATTR_SSCI, rx_sa->ssci)) ||
3229 nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, rx_sa->active)) {
3230 nla_nest_cancel(skb, rxsa_nest);
3231 nla_nest_cancel(skb, rxsc_nest);
3232 nla_nest_cancel(skb, rxsc_list);
3233 goto nla_put_failure;
3235 nla_nest_end(skb, rxsa_nest);
3238 nla_nest_end(skb, rxsa_list);
3239 nla_nest_end(skb, rxsc_nest);
3242 nla_nest_end(skb, rxsc_list);
3244 genlmsg_end(skb, hdr);
3249 genlmsg_cancel(skb, hdr);
3253 static int macsec_generation = 1; /* protected by RTNL */
3255 static int macsec_dump_txsc(struct sk_buff *skb, struct netlink_callback *cb)
3257 struct net *net = sock_net(skb->sk);
3258 struct net_device *dev;
3261 dev_idx = cb->args[0];
3266 cb->seq = macsec_generation;
3268 for_each_netdev(net, dev) {
3269 struct macsec_secy *secy;
3274 if (!netif_is_macsec(dev))
3277 secy = &macsec_priv(dev)->secy;
3278 if (dump_secy(secy, dev, skb, cb) < 0)
3290 static const struct genl_small_ops macsec_genl_ops[] = {
3292 .cmd = MACSEC_CMD_GET_TXSC,
3293 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3294 .dumpit = macsec_dump_txsc,
3297 .cmd = MACSEC_CMD_ADD_RXSC,
3298 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3299 .doit = macsec_add_rxsc,
3300 .flags = GENL_ADMIN_PERM,
3303 .cmd = MACSEC_CMD_DEL_RXSC,
3304 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3305 .doit = macsec_del_rxsc,
3306 .flags = GENL_ADMIN_PERM,
3309 .cmd = MACSEC_CMD_UPD_RXSC,
3310 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3311 .doit = macsec_upd_rxsc,
3312 .flags = GENL_ADMIN_PERM,
3315 .cmd = MACSEC_CMD_ADD_TXSA,
3316 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3317 .doit = macsec_add_txsa,
3318 .flags = GENL_ADMIN_PERM,
3321 .cmd = MACSEC_CMD_DEL_TXSA,
3322 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3323 .doit = macsec_del_txsa,
3324 .flags = GENL_ADMIN_PERM,
3327 .cmd = MACSEC_CMD_UPD_TXSA,
3328 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3329 .doit = macsec_upd_txsa,
3330 .flags = GENL_ADMIN_PERM,
3333 .cmd = MACSEC_CMD_ADD_RXSA,
3334 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3335 .doit = macsec_add_rxsa,
3336 .flags = GENL_ADMIN_PERM,
3339 .cmd = MACSEC_CMD_DEL_RXSA,
3340 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3341 .doit = macsec_del_rxsa,
3342 .flags = GENL_ADMIN_PERM,
3345 .cmd = MACSEC_CMD_UPD_RXSA,
3346 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3347 .doit = macsec_upd_rxsa,
3348 .flags = GENL_ADMIN_PERM,
3351 .cmd = MACSEC_CMD_UPD_OFFLOAD,
3352 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3353 .doit = macsec_upd_offload,
3354 .flags = GENL_ADMIN_PERM,
3358 static struct genl_family macsec_fam __ro_after_init = {
3359 .name = MACSEC_GENL_NAME,
3361 .version = MACSEC_GENL_VERSION,
3362 .maxattr = MACSEC_ATTR_MAX,
3363 .policy = macsec_genl_policy,
3365 .module = THIS_MODULE,
3366 .small_ops = macsec_genl_ops,
3367 .n_small_ops = ARRAY_SIZE(macsec_genl_ops),
3370 static netdev_tx_t macsec_start_xmit(struct sk_buff *skb,
3371 struct net_device *dev)
3373 struct macsec_dev *macsec = netdev_priv(dev);
3374 struct macsec_secy *secy = &macsec->secy;
3375 struct pcpu_secy_stats *secy_stats;
3378 if (macsec_is_offloaded(netdev_priv(dev))) {
3379 skb->dev = macsec->real_dev;
3380 return dev_queue_xmit(skb);
3384 if (!secy->protect_frames) {
3385 secy_stats = this_cpu_ptr(macsec->stats);
3386 u64_stats_update_begin(&secy_stats->syncp);
3387 secy_stats->stats.OutPktsUntagged++;
3388 u64_stats_update_end(&secy_stats->syncp);
3389 skb->dev = macsec->real_dev;
3391 ret = dev_queue_xmit(skb);
3392 count_tx(dev, ret, len);
3396 if (!secy->operational) {
3398 dev->stats.tx_dropped++;
3399 return NETDEV_TX_OK;
3402 skb = macsec_encrypt(skb, dev);
3404 if (PTR_ERR(skb) != -EINPROGRESS)
3405 dev->stats.tx_dropped++;
3406 return NETDEV_TX_OK;
3409 macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa);
3411 macsec_encrypt_finish(skb, dev);
3413 ret = dev_queue_xmit(skb);
3414 count_tx(dev, ret, len);
3418 #define SW_MACSEC_FEATURES \
3419 (NETIF_F_SG | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST)
3421 /* If h/w offloading is enabled, use real device features save for
3422 * VLAN_FEATURES - they require additional ops
3423 * HW_MACSEC - no reason to report it
3425 #define REAL_DEV_FEATURES(dev) \
3426 ((dev)->features & ~(NETIF_F_VLAN_FEATURES | NETIF_F_HW_MACSEC))
3428 static int macsec_dev_init(struct net_device *dev)
3430 struct macsec_dev *macsec = macsec_priv(dev);
3431 struct net_device *real_dev = macsec->real_dev;
3434 dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
3438 err = gro_cells_init(&macsec->gro_cells, dev);
3440 free_percpu(dev->tstats);
3444 if (macsec_is_offloaded(macsec)) {
3445 dev->features = REAL_DEV_FEATURES(real_dev);
3447 dev->features = real_dev->features & SW_MACSEC_FEATURES;
3448 dev->features |= NETIF_F_LLTX | NETIF_F_GSO_SOFTWARE;
3451 dev->needed_headroom = real_dev->needed_headroom +
3452 MACSEC_NEEDED_HEADROOM;
3453 dev->needed_tailroom = real_dev->needed_tailroom +
3454 MACSEC_NEEDED_TAILROOM;
3456 if (is_zero_ether_addr(dev->dev_addr))
3457 eth_hw_addr_inherit(dev, real_dev);
3458 if (is_zero_ether_addr(dev->broadcast))
3459 memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len);
3464 static void macsec_dev_uninit(struct net_device *dev)
3466 struct macsec_dev *macsec = macsec_priv(dev);
3468 gro_cells_destroy(&macsec->gro_cells);
3469 free_percpu(dev->tstats);
3472 static netdev_features_t macsec_fix_features(struct net_device *dev,
3473 netdev_features_t features)
3475 struct macsec_dev *macsec = macsec_priv(dev);
3476 struct net_device *real_dev = macsec->real_dev;
3478 if (macsec_is_offloaded(macsec))
3479 return REAL_DEV_FEATURES(real_dev);
3481 features &= (real_dev->features & SW_MACSEC_FEATURES) |
3482 NETIF_F_GSO_SOFTWARE | NETIF_F_SOFT_FEATURES;
3483 features |= NETIF_F_LLTX;
3488 static int macsec_dev_open(struct net_device *dev)
3490 struct macsec_dev *macsec = macsec_priv(dev);
3491 struct net_device *real_dev = macsec->real_dev;
3494 err = dev_uc_add(real_dev, dev->dev_addr);
3498 if (dev->flags & IFF_ALLMULTI) {
3499 err = dev_set_allmulti(real_dev, 1);
3504 if (dev->flags & IFF_PROMISC) {
3505 err = dev_set_promiscuity(real_dev, 1);
3507 goto clear_allmulti;
3510 /* If h/w offloading is available, propagate to the device */
3511 if (macsec_is_offloaded(macsec)) {
3512 const struct macsec_ops *ops;
3513 struct macsec_context ctx;
3515 ops = macsec_get_ops(netdev_priv(dev), &ctx);
3518 goto clear_allmulti;
3521 ctx.secy = &macsec->secy;
3522 err = macsec_offload(ops->mdo_dev_open, &ctx);
3524 goto clear_allmulti;
3527 if (netif_carrier_ok(real_dev))
3528 netif_carrier_on(dev);
3532 if (dev->flags & IFF_ALLMULTI)
3533 dev_set_allmulti(real_dev, -1);
3535 dev_uc_del(real_dev, dev->dev_addr);
3536 netif_carrier_off(dev);
3540 static int macsec_dev_stop(struct net_device *dev)
3542 struct macsec_dev *macsec = macsec_priv(dev);
3543 struct net_device *real_dev = macsec->real_dev;
3545 netif_carrier_off(dev);
3547 /* If h/w offloading is available, propagate to the device */
3548 if (macsec_is_offloaded(macsec)) {
3549 const struct macsec_ops *ops;
3550 struct macsec_context ctx;
3552 ops = macsec_get_ops(macsec, &ctx);
3554 ctx.secy = &macsec->secy;
3555 macsec_offload(ops->mdo_dev_stop, &ctx);
3559 dev_mc_unsync(real_dev, dev);
3560 dev_uc_unsync(real_dev, dev);
3562 if (dev->flags & IFF_ALLMULTI)
3563 dev_set_allmulti(real_dev, -1);
3565 if (dev->flags & IFF_PROMISC)
3566 dev_set_promiscuity(real_dev, -1);
3568 dev_uc_del(real_dev, dev->dev_addr);
3573 static void macsec_dev_change_rx_flags(struct net_device *dev, int change)
3575 struct net_device *real_dev = macsec_priv(dev)->real_dev;
3577 if (!(dev->flags & IFF_UP))
3580 if (change & IFF_ALLMULTI)
3581 dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1);
3583 if (change & IFF_PROMISC)
3584 dev_set_promiscuity(real_dev,
3585 dev->flags & IFF_PROMISC ? 1 : -1);
3588 static void macsec_dev_set_rx_mode(struct net_device *dev)
3590 struct net_device *real_dev = macsec_priv(dev)->real_dev;
3592 dev_mc_sync(real_dev, dev);
3593 dev_uc_sync(real_dev, dev);
3596 static int macsec_set_mac_address(struct net_device *dev, void *p)
3598 struct macsec_dev *macsec = macsec_priv(dev);
3599 struct net_device *real_dev = macsec->real_dev;
3600 struct sockaddr *addr = p;
3603 if (!is_valid_ether_addr(addr->sa_data))
3604 return -EADDRNOTAVAIL;
3606 if (!(dev->flags & IFF_UP))
3609 err = dev_uc_add(real_dev, addr->sa_data);
3613 dev_uc_del(real_dev, dev->dev_addr);
3616 ether_addr_copy(dev->dev_addr, addr->sa_data);
3617 macsec->secy.sci = dev_to_sci(dev, MACSEC_PORT_ES);
3619 /* If h/w offloading is available, propagate to the device */
3620 if (macsec_is_offloaded(macsec)) {
3621 const struct macsec_ops *ops;
3622 struct macsec_context ctx;
3624 ops = macsec_get_ops(macsec, &ctx);
3626 ctx.secy = &macsec->secy;
3627 macsec_offload(ops->mdo_upd_secy, &ctx);
3634 static int macsec_change_mtu(struct net_device *dev, int new_mtu)
3636 struct macsec_dev *macsec = macsec_priv(dev);
3637 unsigned int extra = macsec->secy.icv_len + macsec_extra_len(true);
3639 if (macsec->real_dev->mtu - extra < new_mtu)
3647 static void macsec_get_stats64(struct net_device *dev,
3648 struct rtnl_link_stats64 *s)
3653 dev_fetch_sw_netstats(s, dev->tstats);
3655 s->rx_dropped = dev->stats.rx_dropped;
3656 s->tx_dropped = dev->stats.tx_dropped;
3659 static int macsec_get_iflink(const struct net_device *dev)
3661 return macsec_priv(dev)->real_dev->ifindex;
3664 static const struct net_device_ops macsec_netdev_ops = {
3665 .ndo_init = macsec_dev_init,
3666 .ndo_uninit = macsec_dev_uninit,
3667 .ndo_open = macsec_dev_open,
3668 .ndo_stop = macsec_dev_stop,
3669 .ndo_fix_features = macsec_fix_features,
3670 .ndo_change_mtu = macsec_change_mtu,
3671 .ndo_set_rx_mode = macsec_dev_set_rx_mode,
3672 .ndo_change_rx_flags = macsec_dev_change_rx_flags,
3673 .ndo_set_mac_address = macsec_set_mac_address,
3674 .ndo_start_xmit = macsec_start_xmit,
3675 .ndo_get_stats64 = macsec_get_stats64,
3676 .ndo_get_iflink = macsec_get_iflink,
3679 static const struct device_type macsec_type = {
3683 static const struct nla_policy macsec_rtnl_policy[IFLA_MACSEC_MAX + 1] = {
3684 [IFLA_MACSEC_SCI] = { .type = NLA_U64 },
3685 [IFLA_MACSEC_PORT] = { .type = NLA_U16 },
3686 [IFLA_MACSEC_ICV_LEN] = { .type = NLA_U8 },
3687 [IFLA_MACSEC_CIPHER_SUITE] = { .type = NLA_U64 },
3688 [IFLA_MACSEC_WINDOW] = { .type = NLA_U32 },
3689 [IFLA_MACSEC_ENCODING_SA] = { .type = NLA_U8 },
3690 [IFLA_MACSEC_ENCRYPT] = { .type = NLA_U8 },
3691 [IFLA_MACSEC_PROTECT] = { .type = NLA_U8 },
3692 [IFLA_MACSEC_INC_SCI] = { .type = NLA_U8 },
3693 [IFLA_MACSEC_ES] = { .type = NLA_U8 },
3694 [IFLA_MACSEC_SCB] = { .type = NLA_U8 },
3695 [IFLA_MACSEC_REPLAY_PROTECT] = { .type = NLA_U8 },
3696 [IFLA_MACSEC_VALIDATION] = { .type = NLA_U8 },
3699 static void macsec_free_netdev(struct net_device *dev)
3701 struct macsec_dev *macsec = macsec_priv(dev);
3703 free_percpu(macsec->stats);
3704 free_percpu(macsec->secy.tx_sc.stats);
3708 static void macsec_setup(struct net_device *dev)
3712 dev->max_mtu = ETH_MAX_MTU;
3713 dev->priv_flags |= IFF_NO_QUEUE;
3714 dev->netdev_ops = &macsec_netdev_ops;
3715 dev->needs_free_netdev = true;
3716 dev->priv_destructor = macsec_free_netdev;
3717 SET_NETDEV_DEVTYPE(dev, &macsec_type);
3719 eth_zero_addr(dev->broadcast);
3722 static int macsec_changelink_common(struct net_device *dev,
3723 struct nlattr *data[])
3725 struct macsec_secy *secy;
3726 struct macsec_tx_sc *tx_sc;
3728 secy = &macsec_priv(dev)->secy;
3729 tx_sc = &secy->tx_sc;
3731 if (data[IFLA_MACSEC_ENCODING_SA]) {
3732 struct macsec_tx_sa *tx_sa;
3734 tx_sc->encoding_sa = nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]);
3735 tx_sa = rtnl_dereference(tx_sc->sa[tx_sc->encoding_sa]);
3737 secy->operational = tx_sa && tx_sa->active;
3740 if (data[IFLA_MACSEC_WINDOW])
3741 secy->replay_window = nla_get_u32(data[IFLA_MACSEC_WINDOW]);
3743 if (data[IFLA_MACSEC_ENCRYPT])
3744 tx_sc->encrypt = !!nla_get_u8(data[IFLA_MACSEC_ENCRYPT]);
3746 if (data[IFLA_MACSEC_PROTECT])
3747 secy->protect_frames = !!nla_get_u8(data[IFLA_MACSEC_PROTECT]);
3749 if (data[IFLA_MACSEC_INC_SCI])
3750 tx_sc->send_sci = !!nla_get_u8(data[IFLA_MACSEC_INC_SCI]);
3752 if (data[IFLA_MACSEC_ES])
3753 tx_sc->end_station = !!nla_get_u8(data[IFLA_MACSEC_ES]);
3755 if (data[IFLA_MACSEC_SCB])
3756 tx_sc->scb = !!nla_get_u8(data[IFLA_MACSEC_SCB]);
3758 if (data[IFLA_MACSEC_REPLAY_PROTECT])
3759 secy->replay_protect = !!nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT]);
3761 if (data[IFLA_MACSEC_VALIDATION])
3762 secy->validate_frames = nla_get_u8(data[IFLA_MACSEC_VALIDATION]);
3764 if (data[IFLA_MACSEC_CIPHER_SUITE]) {
3765 switch (nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE])) {
3766 case MACSEC_CIPHER_ID_GCM_AES_128:
3767 case MACSEC_DEFAULT_CIPHER_ID:
3768 secy->key_len = MACSEC_GCM_AES_128_SAK_LEN;
3771 case MACSEC_CIPHER_ID_GCM_AES_256:
3772 secy->key_len = MACSEC_GCM_AES_256_SAK_LEN;
3775 case MACSEC_CIPHER_ID_GCM_AES_XPN_128:
3776 secy->key_len = MACSEC_GCM_AES_128_SAK_LEN;
3779 case MACSEC_CIPHER_ID_GCM_AES_XPN_256:
3780 secy->key_len = MACSEC_GCM_AES_256_SAK_LEN;
3791 static int macsec_changelink(struct net_device *dev, struct nlattr *tb[],
3792 struct nlattr *data[],
3793 struct netlink_ext_ack *extack)
3795 struct macsec_dev *macsec = macsec_priv(dev);
3796 struct macsec_tx_sc tx_sc;
3797 struct macsec_secy secy;
3803 if (data[IFLA_MACSEC_CIPHER_SUITE] ||
3804 data[IFLA_MACSEC_ICV_LEN] ||
3805 data[IFLA_MACSEC_SCI] ||
3806 data[IFLA_MACSEC_PORT])
3809 /* Keep a copy of unmodified secy and tx_sc, in case the offload
3810 * propagation fails, to revert macsec_changelink_common.
3812 memcpy(&secy, &macsec->secy, sizeof(secy));
3813 memcpy(&tx_sc, &macsec->secy.tx_sc, sizeof(tx_sc));
3815 ret = macsec_changelink_common(dev, data);
3819 /* If h/w offloading is available, propagate to the device */
3820 if (macsec_is_offloaded(macsec)) {
3821 const struct macsec_ops *ops;
3822 struct macsec_context ctx;
3825 ops = macsec_get_ops(netdev_priv(dev), &ctx);
3831 ctx.secy = &macsec->secy;
3832 ret = macsec_offload(ops->mdo_upd_secy, &ctx);
3840 memcpy(&macsec->secy.tx_sc, &tx_sc, sizeof(tx_sc));
3841 memcpy(&macsec->secy, &secy, sizeof(secy));
3846 static void macsec_del_dev(struct macsec_dev *macsec)
3850 while (macsec->secy.rx_sc) {
3851 struct macsec_rx_sc *rx_sc = rtnl_dereference(macsec->secy.rx_sc);
3853 rcu_assign_pointer(macsec->secy.rx_sc, rx_sc->next);
3857 for (i = 0; i < MACSEC_NUM_AN; i++) {
3858 struct macsec_tx_sa *sa = rtnl_dereference(macsec->secy.tx_sc.sa[i]);
3861 RCU_INIT_POINTER(macsec->secy.tx_sc.sa[i], NULL);
3867 static void macsec_common_dellink(struct net_device *dev, struct list_head *head)
3869 struct macsec_dev *macsec = macsec_priv(dev);
3870 struct net_device *real_dev = macsec->real_dev;
3872 unregister_netdevice_queue(dev, head);
3873 list_del_rcu(&macsec->secys);
3874 macsec_del_dev(macsec);
3875 netdev_upper_dev_unlink(real_dev, dev);
3877 macsec_generation++;
3880 static void macsec_dellink(struct net_device *dev, struct list_head *head)
3882 struct macsec_dev *macsec = macsec_priv(dev);
3883 struct net_device *real_dev = macsec->real_dev;
3884 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
3886 /* If h/w offloading is available, propagate to the device */
3887 if (macsec_is_offloaded(macsec)) {
3888 const struct macsec_ops *ops;
3889 struct macsec_context ctx;
3891 ops = macsec_get_ops(netdev_priv(dev), &ctx);
3893 ctx.secy = &macsec->secy;
3894 macsec_offload(ops->mdo_del_secy, &ctx);
3898 macsec_common_dellink(dev, head);
3900 if (list_empty(&rxd->secys)) {
3901 netdev_rx_handler_unregister(real_dev);
3906 static int register_macsec_dev(struct net_device *real_dev,
3907 struct net_device *dev)
3909 struct macsec_dev *macsec = macsec_priv(dev);
3910 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
3915 rxd = kmalloc(sizeof(*rxd), GFP_KERNEL);
3919 INIT_LIST_HEAD(&rxd->secys);
3921 err = netdev_rx_handler_register(real_dev, macsec_handle_frame,
3929 list_add_tail_rcu(&macsec->secys, &rxd->secys);
3933 static bool sci_exists(struct net_device *dev, sci_t sci)
3935 struct macsec_rxh_data *rxd = macsec_data_rtnl(dev);
3936 struct macsec_dev *macsec;
3938 list_for_each_entry(macsec, &rxd->secys, secys) {
3939 if (macsec->secy.sci == sci)
3946 static int macsec_add_dev(struct net_device *dev, sci_t sci, u8 icv_len)
3948 struct macsec_dev *macsec = macsec_priv(dev);
3949 struct macsec_secy *secy = &macsec->secy;
3951 macsec->stats = netdev_alloc_pcpu_stats(struct pcpu_secy_stats);
3955 secy->tx_sc.stats = netdev_alloc_pcpu_stats(struct pcpu_tx_sc_stats);
3956 if (!secy->tx_sc.stats) {
3957 free_percpu(macsec->stats);
3961 if (sci == MACSEC_UNDEF_SCI)
3962 sci = dev_to_sci(dev, MACSEC_PORT_ES);
3965 secy->operational = true;
3966 secy->key_len = DEFAULT_SAK_LEN;
3967 secy->icv_len = icv_len;
3968 secy->validate_frames = MACSEC_VALIDATE_DEFAULT;
3969 secy->protect_frames = true;
3970 secy->replay_protect = false;
3971 secy->xpn = DEFAULT_XPN;
3974 secy->tx_sc.active = true;
3975 secy->tx_sc.encoding_sa = DEFAULT_ENCODING_SA;
3976 secy->tx_sc.encrypt = DEFAULT_ENCRYPT;
3977 secy->tx_sc.send_sci = DEFAULT_SEND_SCI;
3978 secy->tx_sc.end_station = false;
3979 secy->tx_sc.scb = false;
3984 static struct lock_class_key macsec_netdev_addr_lock_key;
3986 static int macsec_newlink(struct net *net, struct net_device *dev,
3987 struct nlattr *tb[], struct nlattr *data[],
3988 struct netlink_ext_ack *extack)
3990 struct macsec_dev *macsec = macsec_priv(dev);
3991 rx_handler_func_t *rx_handler;
3992 u8 icv_len = DEFAULT_ICV_LEN;
3993 struct net_device *real_dev;
3999 real_dev = __dev_get_by_index(net, nla_get_u32(tb[IFLA_LINK]));
4002 if (real_dev->type != ARPHRD_ETHER)
4005 dev->priv_flags |= IFF_MACSEC;
4007 macsec->real_dev = real_dev;
4009 if (data && data[IFLA_MACSEC_OFFLOAD])
4010 macsec->offload = nla_get_offload(data[IFLA_MACSEC_OFFLOAD]);
4012 /* MACsec offloading is off by default */
4013 macsec->offload = MACSEC_OFFLOAD_OFF;
4015 /* Check if the offloading mode is supported by the underlying layers */
4016 if (macsec->offload != MACSEC_OFFLOAD_OFF &&
4017 !macsec_check_offload(macsec->offload, macsec))
4020 if (data && data[IFLA_MACSEC_ICV_LEN])
4021 icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]);
4022 mtu = real_dev->mtu - icv_len - macsec_extra_len(true);
4028 rx_handler = rtnl_dereference(real_dev->rx_handler);
4029 if (rx_handler && rx_handler != macsec_handle_frame)
4032 err = register_netdevice(dev);
4036 netdev_lockdep_set_classes(dev);
4037 lockdep_set_class(&dev->addr_list_lock,
4038 &macsec_netdev_addr_lock_key);
4040 err = netdev_upper_dev_link(real_dev, dev, extack);
4044 /* need to be already registered so that ->init has run and
4045 * the MAC addr is set
4047 if (data && data[IFLA_MACSEC_SCI])
4048 sci = nla_get_sci(data[IFLA_MACSEC_SCI]);
4049 else if (data && data[IFLA_MACSEC_PORT])
4050 sci = dev_to_sci(dev, nla_get_be16(data[IFLA_MACSEC_PORT]));
4052 sci = dev_to_sci(dev, MACSEC_PORT_ES);
4054 if (rx_handler && sci_exists(real_dev, sci)) {
4059 err = macsec_add_dev(dev, sci, icv_len);
4064 err = macsec_changelink_common(dev, data);
4069 /* If h/w offloading is available, propagate to the device */
4070 if (macsec_is_offloaded(macsec)) {
4071 const struct macsec_ops *ops;
4072 struct macsec_context ctx;
4074 ops = macsec_get_ops(macsec, &ctx);
4076 ctx.secy = &macsec->secy;
4077 err = macsec_offload(ops->mdo_add_secy, &ctx);
4083 err = register_macsec_dev(real_dev, dev);
4087 netif_stacked_transfer_operstate(real_dev, dev);
4088 linkwatch_fire_event(dev);
4090 macsec_generation++;
4095 macsec_del_dev(macsec);
4097 netdev_upper_dev_unlink(real_dev, dev);
4099 unregister_netdevice(dev);
4103 static int macsec_validate_attr(struct nlattr *tb[], struct nlattr *data[],
4104 struct netlink_ext_ack *extack)
4106 u64 csid = MACSEC_DEFAULT_CIPHER_ID;
4107 u8 icv_len = DEFAULT_ICV_LEN;
4114 if (data[IFLA_MACSEC_CIPHER_SUITE])
4115 csid = nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE]);
4117 if (data[IFLA_MACSEC_ICV_LEN]) {
4118 icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]);
4119 if (icv_len != DEFAULT_ICV_LEN) {
4120 char dummy_key[DEFAULT_SAK_LEN] = { 0 };
4121 struct crypto_aead *dummy_tfm;
4123 dummy_tfm = macsec_alloc_tfm(dummy_key,
4126 if (IS_ERR(dummy_tfm))
4127 return PTR_ERR(dummy_tfm);
4128 crypto_free_aead(dummy_tfm);
4133 case MACSEC_CIPHER_ID_GCM_AES_128:
4134 case MACSEC_CIPHER_ID_GCM_AES_256:
4135 case MACSEC_CIPHER_ID_GCM_AES_XPN_128:
4136 case MACSEC_CIPHER_ID_GCM_AES_XPN_256:
4137 case MACSEC_DEFAULT_CIPHER_ID:
4138 if (icv_len < MACSEC_MIN_ICV_LEN ||
4139 icv_len > MACSEC_STD_ICV_LEN)
4146 if (data[IFLA_MACSEC_ENCODING_SA]) {
4147 if (nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]) >= MACSEC_NUM_AN)
4151 for (flag = IFLA_MACSEC_ENCODING_SA + 1;
4152 flag < IFLA_MACSEC_VALIDATION;
4155 if (nla_get_u8(data[flag]) > 1)
4160 es = data[IFLA_MACSEC_ES] ? nla_get_u8(data[IFLA_MACSEC_ES]) : false;
4161 sci = data[IFLA_MACSEC_INC_SCI] ? nla_get_u8(data[IFLA_MACSEC_INC_SCI]) : false;
4162 scb = data[IFLA_MACSEC_SCB] ? nla_get_u8(data[IFLA_MACSEC_SCB]) : false;
4164 if ((sci && (scb || es)) || (scb && es))
4167 if (data[IFLA_MACSEC_VALIDATION] &&
4168 nla_get_u8(data[IFLA_MACSEC_VALIDATION]) > MACSEC_VALIDATE_MAX)
4171 if ((data[IFLA_MACSEC_REPLAY_PROTECT] &&
4172 nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT])) &&
4173 !data[IFLA_MACSEC_WINDOW])
4179 static struct net *macsec_get_link_net(const struct net_device *dev)
4181 return dev_net(macsec_priv(dev)->real_dev);
4184 static size_t macsec_get_size(const struct net_device *dev)
4186 return nla_total_size_64bit(8) + /* IFLA_MACSEC_SCI */
4187 nla_total_size(1) + /* IFLA_MACSEC_ICV_LEN */
4188 nla_total_size_64bit(8) + /* IFLA_MACSEC_CIPHER_SUITE */
4189 nla_total_size(4) + /* IFLA_MACSEC_WINDOW */
4190 nla_total_size(1) + /* IFLA_MACSEC_ENCODING_SA */
4191 nla_total_size(1) + /* IFLA_MACSEC_ENCRYPT */
4192 nla_total_size(1) + /* IFLA_MACSEC_PROTECT */
4193 nla_total_size(1) + /* IFLA_MACSEC_INC_SCI */
4194 nla_total_size(1) + /* IFLA_MACSEC_ES */
4195 nla_total_size(1) + /* IFLA_MACSEC_SCB */
4196 nla_total_size(1) + /* IFLA_MACSEC_REPLAY_PROTECT */
4197 nla_total_size(1) + /* IFLA_MACSEC_VALIDATION */
4201 static int macsec_fill_info(struct sk_buff *skb,
4202 const struct net_device *dev)
4204 struct macsec_secy *secy = &macsec_priv(dev)->secy;
4205 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
4208 switch (secy->key_len) {
4209 case MACSEC_GCM_AES_128_SAK_LEN:
4210 csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_128 : MACSEC_DEFAULT_CIPHER_ID;
4212 case MACSEC_GCM_AES_256_SAK_LEN:
4213 csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_256 : MACSEC_CIPHER_ID_GCM_AES_256;
4216 goto nla_put_failure;
4219 if (nla_put_sci(skb, IFLA_MACSEC_SCI, secy->sci,
4221 nla_put_u8(skb, IFLA_MACSEC_ICV_LEN, secy->icv_len) ||
4222 nla_put_u64_64bit(skb, IFLA_MACSEC_CIPHER_SUITE,
4223 csid, IFLA_MACSEC_PAD) ||
4224 nla_put_u8(skb, IFLA_MACSEC_ENCODING_SA, tx_sc->encoding_sa) ||
4225 nla_put_u8(skb, IFLA_MACSEC_ENCRYPT, tx_sc->encrypt) ||
4226 nla_put_u8(skb, IFLA_MACSEC_PROTECT, secy->protect_frames) ||
4227 nla_put_u8(skb, IFLA_MACSEC_INC_SCI, tx_sc->send_sci) ||
4228 nla_put_u8(skb, IFLA_MACSEC_ES, tx_sc->end_station) ||
4229 nla_put_u8(skb, IFLA_MACSEC_SCB, tx_sc->scb) ||
4230 nla_put_u8(skb, IFLA_MACSEC_REPLAY_PROTECT, secy->replay_protect) ||
4231 nla_put_u8(skb, IFLA_MACSEC_VALIDATION, secy->validate_frames) ||
4233 goto nla_put_failure;
4235 if (secy->replay_protect) {
4236 if (nla_put_u32(skb, IFLA_MACSEC_WINDOW, secy->replay_window))
4237 goto nla_put_failure;
4246 static struct rtnl_link_ops macsec_link_ops __read_mostly = {
4248 .priv_size = sizeof(struct macsec_dev),
4249 .maxtype = IFLA_MACSEC_MAX,
4250 .policy = macsec_rtnl_policy,
4251 .setup = macsec_setup,
4252 .validate = macsec_validate_attr,
4253 .newlink = macsec_newlink,
4254 .changelink = macsec_changelink,
4255 .dellink = macsec_dellink,
4256 .get_size = macsec_get_size,
4257 .fill_info = macsec_fill_info,
4258 .get_link_net = macsec_get_link_net,
4261 static bool is_macsec_master(struct net_device *dev)
4263 return rcu_access_pointer(dev->rx_handler) == macsec_handle_frame;
4266 static int macsec_notify(struct notifier_block *this, unsigned long event,
4269 struct net_device *real_dev = netdev_notifier_info_to_dev(ptr);
4272 if (!is_macsec_master(real_dev))
4278 case NETDEV_CHANGE: {
4279 struct macsec_dev *m, *n;
4280 struct macsec_rxh_data *rxd;
4282 rxd = macsec_data_rtnl(real_dev);
4283 list_for_each_entry_safe(m, n, &rxd->secys, secys) {
4284 struct net_device *dev = m->secy.netdev;
4286 netif_stacked_transfer_operstate(real_dev, dev);
4290 case NETDEV_UNREGISTER: {
4291 struct macsec_dev *m, *n;
4292 struct macsec_rxh_data *rxd;
4294 rxd = macsec_data_rtnl(real_dev);
4295 list_for_each_entry_safe(m, n, &rxd->secys, secys) {
4296 macsec_common_dellink(m->secy.netdev, &head);
4299 netdev_rx_handler_unregister(real_dev);
4302 unregister_netdevice_many(&head);
4305 case NETDEV_CHANGEMTU: {
4306 struct macsec_dev *m;
4307 struct macsec_rxh_data *rxd;
4309 rxd = macsec_data_rtnl(real_dev);
4310 list_for_each_entry(m, &rxd->secys, secys) {
4311 struct net_device *dev = m->secy.netdev;
4312 unsigned int mtu = real_dev->mtu - (m->secy.icv_len +
4313 macsec_extra_len(true));
4316 dev_set_mtu(dev, mtu);
4324 static struct notifier_block macsec_notifier = {
4325 .notifier_call = macsec_notify,
4328 static int __init macsec_init(void)
4332 pr_info("MACsec IEEE 802.1AE\n");
4333 err = register_netdevice_notifier(&macsec_notifier);
4337 err = rtnl_link_register(&macsec_link_ops);
4341 err = genl_register_family(&macsec_fam);
4348 rtnl_link_unregister(&macsec_link_ops);
4350 unregister_netdevice_notifier(&macsec_notifier);
4354 static void __exit macsec_exit(void)
4356 genl_unregister_family(&macsec_fam);
4357 rtnl_link_unregister(&macsec_link_ops);
4358 unregister_netdevice_notifier(&macsec_notifier);
4362 module_init(macsec_init);
4363 module_exit(macsec_exit);
4365 MODULE_ALIAS_RTNL_LINK("macsec");
4366 MODULE_ALIAS_GENL_FAMILY("macsec");
4368 MODULE_DESCRIPTION("MACsec IEEE 802.1AE");
4369 MODULE_LICENSE("GPL v2");