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;
1083 struct pcpu_rx_sc_stats *rxsc_stats;
1084 struct pcpu_secy_stats *secy_stats;
1088 if (skb_headroom(skb) < ETH_HLEN)
1091 hdr = macsec_ethhdr(skb);
1092 if (hdr->eth.h_proto != htons(ETH_P_MACSEC))
1093 return handle_not_macsec(skb);
1095 skb = skb_unshare(skb, GFP_ATOMIC);
1098 return RX_HANDLER_CONSUMED;
1100 pulled_sci = pskb_may_pull(skb, macsec_extra_len(true));
1102 if (!pskb_may_pull(skb, macsec_extra_len(false)))
1106 hdr = macsec_ethhdr(skb);
1108 /* Frames with a SecTAG that has the TCI E bit set but the C
1109 * bit clear are discarded, as this reserved encoding is used
1110 * to identify frames with a SecTAG that are not to be
1111 * delivered to the Controlled Port.
1113 if ((hdr->tci_an & (MACSEC_TCI_C | MACSEC_TCI_E)) == MACSEC_TCI_E)
1114 return RX_HANDLER_PASS;
1116 /* now, pull the extra length */
1117 if (hdr->tci_an & MACSEC_TCI_SC) {
1122 /* ethernet header is part of crypto processing */
1123 skb_push(skb, ETH_HLEN);
1125 macsec_skb_cb(skb)->has_sci = !!(hdr->tci_an & MACSEC_TCI_SC);
1126 macsec_skb_cb(skb)->assoc_num = hdr->tci_an & MACSEC_AN_MASK;
1127 sci = macsec_frame_sci(hdr, macsec_skb_cb(skb)->has_sci);
1130 rxd = macsec_data_rcu(skb->dev);
1132 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1133 struct macsec_rx_sc *sc = find_rx_sc(&macsec->secy, sci);
1135 sc = sc ? macsec_rxsc_get(sc) : NULL;
1138 secy = &macsec->secy;
1148 macsec = macsec_priv(dev);
1149 secy_stats = this_cpu_ptr(macsec->stats);
1150 rxsc_stats = this_cpu_ptr(rx_sc->stats);
1152 if (!macsec_validate_skb(skb, secy->icv_len, secy->xpn)) {
1153 u64_stats_update_begin(&secy_stats->syncp);
1154 secy_stats->stats.InPktsBadTag++;
1155 u64_stats_update_end(&secy_stats->syncp);
1159 rx_sa = macsec_rxsa_get(rx_sc->sa[macsec_skb_cb(skb)->assoc_num]);
1161 /* 10.6.1 if the SA is not in use */
1163 /* If validateFrames is Strict or the C bit in the
1164 * SecTAG is set, discard
1166 if (hdr->tci_an & MACSEC_TCI_C ||
1167 secy->validate_frames == MACSEC_VALIDATE_STRICT) {
1168 u64_stats_update_begin(&rxsc_stats->syncp);
1169 rxsc_stats->stats.InPktsNotUsingSA++;
1170 u64_stats_update_end(&rxsc_stats->syncp);
1174 /* not Strict, the frame (with the SecTAG and ICV
1175 * removed) is delivered to the Controlled Port.
1177 u64_stats_update_begin(&rxsc_stats->syncp);
1178 rxsc_stats->stats.InPktsUnusedSA++;
1179 u64_stats_update_end(&rxsc_stats->syncp);
1183 /* First, PN check to avoid decrypting obviously wrong packets */
1184 hdr_pn = ntohl(hdr->packet_number);
1185 if (secy->replay_protect) {
1188 spin_lock(&rx_sa->lock);
1189 late = rx_sa->next_pn_halves.lower >= secy->replay_window &&
1190 hdr_pn < (rx_sa->next_pn_halves.lower - secy->replay_window);
1193 late = late && pn_same_half(rx_sa->next_pn_halves.lower, hdr_pn);
1194 spin_unlock(&rx_sa->lock);
1197 u64_stats_update_begin(&rxsc_stats->syncp);
1198 rxsc_stats->stats.InPktsLate++;
1199 u64_stats_update_end(&rxsc_stats->syncp);
1204 macsec_skb_cb(skb)->rx_sa = rx_sa;
1206 /* Disabled && !changed text => skip validation */
1207 if (hdr->tci_an & MACSEC_TCI_C ||
1208 secy->validate_frames != MACSEC_VALIDATE_DISABLED)
1209 skb = macsec_decrypt(skb, dev, rx_sa, sci, secy);
1212 /* the decrypt callback needs the reference */
1213 if (PTR_ERR(skb) != -EINPROGRESS) {
1214 macsec_rxsa_put(rx_sa);
1215 macsec_rxsc_put(rx_sc);
1219 return RX_HANDLER_CONSUMED;
1222 if (!macsec_post_decrypt(skb, secy, hdr_pn))
1226 macsec_finalize_skb(skb, secy->icv_len,
1227 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
1228 macsec_reset_skb(skb, secy->netdev);
1231 macsec_rxsa_put(rx_sa);
1232 macsec_rxsc_put(rx_sc);
1235 ret = gro_cells_receive(&macsec->gro_cells, skb);
1236 if (ret == NET_RX_SUCCESS)
1237 count_rx(dev, skb->len);
1239 macsec->secy.netdev->stats.rx_dropped++;
1244 return RX_HANDLER_CONSUMED;
1247 macsec_rxsa_put(rx_sa);
1249 macsec_rxsc_put(rx_sc);
1254 return RX_HANDLER_CONSUMED;
1257 /* 10.6.1 if the SC is not found */
1258 cbit = !!(hdr->tci_an & MACSEC_TCI_C);
1260 macsec_finalize_skb(skb, DEFAULT_ICV_LEN,
1261 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
1263 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1264 struct sk_buff *nskb;
1266 secy_stats = this_cpu_ptr(macsec->stats);
1268 /* If validateFrames is Strict or the C bit in the
1269 * SecTAG is set, discard
1272 macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) {
1273 u64_stats_update_begin(&secy_stats->syncp);
1274 secy_stats->stats.InPktsNoSCI++;
1275 u64_stats_update_end(&secy_stats->syncp);
1279 /* not strict, the frame (with the SecTAG and ICV
1280 * removed) is delivered to the Controlled Port.
1282 nskb = skb_clone(skb, GFP_ATOMIC);
1286 macsec_reset_skb(nskb, macsec->secy.netdev);
1288 ret = netif_rx(nskb);
1289 if (ret == NET_RX_SUCCESS) {
1290 u64_stats_update_begin(&secy_stats->syncp);
1291 secy_stats->stats.InPktsUnknownSCI++;
1292 u64_stats_update_end(&secy_stats->syncp);
1294 macsec->secy.netdev->stats.rx_dropped++;
1300 return RX_HANDLER_PASS;
1303 static struct crypto_aead *macsec_alloc_tfm(char *key, int key_len, int icv_len)
1305 struct crypto_aead *tfm;
1308 tfm = crypto_alloc_aead("gcm(aes)", 0, 0);
1313 ret = crypto_aead_setkey(tfm, key, key_len);
1317 ret = crypto_aead_setauthsize(tfm, icv_len);
1323 crypto_free_aead(tfm);
1324 return ERR_PTR(ret);
1327 static int init_rx_sa(struct macsec_rx_sa *rx_sa, char *sak, int key_len,
1330 rx_sa->stats = alloc_percpu(struct macsec_rx_sa_stats);
1334 rx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len);
1335 if (IS_ERR(rx_sa->key.tfm)) {
1336 free_percpu(rx_sa->stats);
1337 return PTR_ERR(rx_sa->key.tfm);
1340 rx_sa->ssci = MACSEC_UNDEF_SSCI;
1341 rx_sa->active = false;
1343 refcount_set(&rx_sa->refcnt, 1);
1344 spin_lock_init(&rx_sa->lock);
1349 static void clear_rx_sa(struct macsec_rx_sa *rx_sa)
1351 rx_sa->active = false;
1353 macsec_rxsa_put(rx_sa);
1356 static void free_rx_sc(struct macsec_rx_sc *rx_sc)
1360 for (i = 0; i < MACSEC_NUM_AN; i++) {
1361 struct macsec_rx_sa *sa = rtnl_dereference(rx_sc->sa[i]);
1363 RCU_INIT_POINTER(rx_sc->sa[i], NULL);
1368 macsec_rxsc_put(rx_sc);
1371 static struct macsec_rx_sc *del_rx_sc(struct macsec_secy *secy, sci_t sci)
1373 struct macsec_rx_sc *rx_sc, __rcu **rx_scp;
1375 for (rx_scp = &secy->rx_sc, rx_sc = rtnl_dereference(*rx_scp);
1377 rx_scp = &rx_sc->next, rx_sc = rtnl_dereference(*rx_scp)) {
1378 if (rx_sc->sci == sci) {
1381 rcu_assign_pointer(*rx_scp, rx_sc->next);
1389 static struct macsec_rx_sc *create_rx_sc(struct net_device *dev, sci_t sci)
1391 struct macsec_rx_sc *rx_sc;
1392 struct macsec_dev *macsec;
1393 struct net_device *real_dev = macsec_priv(dev)->real_dev;
1394 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
1395 struct macsec_secy *secy;
1397 list_for_each_entry(macsec, &rxd->secys, secys) {
1398 if (find_rx_sc_rtnl(&macsec->secy, sci))
1399 return ERR_PTR(-EEXIST);
1402 rx_sc = kzalloc(sizeof(*rx_sc), GFP_KERNEL);
1404 return ERR_PTR(-ENOMEM);
1406 rx_sc->stats = netdev_alloc_pcpu_stats(struct pcpu_rx_sc_stats);
1407 if (!rx_sc->stats) {
1409 return ERR_PTR(-ENOMEM);
1413 rx_sc->active = true;
1414 refcount_set(&rx_sc->refcnt, 1);
1416 secy = &macsec_priv(dev)->secy;
1417 rcu_assign_pointer(rx_sc->next, secy->rx_sc);
1418 rcu_assign_pointer(secy->rx_sc, rx_sc);
1426 static int init_tx_sa(struct macsec_tx_sa *tx_sa, char *sak, int key_len,
1429 tx_sa->stats = alloc_percpu(struct macsec_tx_sa_stats);
1433 tx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len);
1434 if (IS_ERR(tx_sa->key.tfm)) {
1435 free_percpu(tx_sa->stats);
1436 return PTR_ERR(tx_sa->key.tfm);
1439 tx_sa->ssci = MACSEC_UNDEF_SSCI;
1440 tx_sa->active = false;
1441 refcount_set(&tx_sa->refcnt, 1);
1442 spin_lock_init(&tx_sa->lock);
1447 static void clear_tx_sa(struct macsec_tx_sa *tx_sa)
1449 tx_sa->active = false;
1451 macsec_txsa_put(tx_sa);
1454 static struct genl_family macsec_fam;
1456 static struct net_device *get_dev_from_nl(struct net *net,
1457 struct nlattr **attrs)
1459 int ifindex = nla_get_u32(attrs[MACSEC_ATTR_IFINDEX]);
1460 struct net_device *dev;
1462 dev = __dev_get_by_index(net, ifindex);
1464 return ERR_PTR(-ENODEV);
1466 if (!netif_is_macsec(dev))
1467 return ERR_PTR(-ENODEV);
1472 static enum macsec_offload nla_get_offload(const struct nlattr *nla)
1474 return (__force enum macsec_offload)nla_get_u8(nla);
1477 static sci_t nla_get_sci(const struct nlattr *nla)
1479 return (__force sci_t)nla_get_u64(nla);
1482 static int nla_put_sci(struct sk_buff *skb, int attrtype, sci_t value,
1485 return nla_put_u64_64bit(skb, attrtype, (__force u64)value, padattr);
1488 static ssci_t nla_get_ssci(const struct nlattr *nla)
1490 return (__force ssci_t)nla_get_u32(nla);
1493 static int nla_put_ssci(struct sk_buff *skb, int attrtype, ssci_t value)
1495 return nla_put_u32(skb, attrtype, (__force u64)value);
1498 static struct macsec_tx_sa *get_txsa_from_nl(struct net *net,
1499 struct nlattr **attrs,
1500 struct nlattr **tb_sa,
1501 struct net_device **devp,
1502 struct macsec_secy **secyp,
1503 struct macsec_tx_sc **scp,
1506 struct net_device *dev;
1507 struct macsec_secy *secy;
1508 struct macsec_tx_sc *tx_sc;
1509 struct macsec_tx_sa *tx_sa;
1511 if (!tb_sa[MACSEC_SA_ATTR_AN])
1512 return ERR_PTR(-EINVAL);
1514 *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1516 dev = get_dev_from_nl(net, attrs);
1518 return ERR_CAST(dev);
1520 if (*assoc_num >= MACSEC_NUM_AN)
1521 return ERR_PTR(-EINVAL);
1523 secy = &macsec_priv(dev)->secy;
1524 tx_sc = &secy->tx_sc;
1526 tx_sa = rtnl_dereference(tx_sc->sa[*assoc_num]);
1528 return ERR_PTR(-ENODEV);
1536 static struct macsec_rx_sc *get_rxsc_from_nl(struct net *net,
1537 struct nlattr **attrs,
1538 struct nlattr **tb_rxsc,
1539 struct net_device **devp,
1540 struct macsec_secy **secyp)
1542 struct net_device *dev;
1543 struct macsec_secy *secy;
1544 struct macsec_rx_sc *rx_sc;
1547 dev = get_dev_from_nl(net, attrs);
1549 return ERR_CAST(dev);
1551 secy = &macsec_priv(dev)->secy;
1553 if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI])
1554 return ERR_PTR(-EINVAL);
1556 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1557 rx_sc = find_rx_sc_rtnl(secy, sci);
1559 return ERR_PTR(-ENODEV);
1567 static struct macsec_rx_sa *get_rxsa_from_nl(struct net *net,
1568 struct nlattr **attrs,
1569 struct nlattr **tb_rxsc,
1570 struct nlattr **tb_sa,
1571 struct net_device **devp,
1572 struct macsec_secy **secyp,
1573 struct macsec_rx_sc **scp,
1576 struct macsec_rx_sc *rx_sc;
1577 struct macsec_rx_sa *rx_sa;
1579 if (!tb_sa[MACSEC_SA_ATTR_AN])
1580 return ERR_PTR(-EINVAL);
1582 *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1583 if (*assoc_num >= MACSEC_NUM_AN)
1584 return ERR_PTR(-EINVAL);
1586 rx_sc = get_rxsc_from_nl(net, attrs, tb_rxsc, devp, secyp);
1588 return ERR_CAST(rx_sc);
1590 rx_sa = rtnl_dereference(rx_sc->sa[*assoc_num]);
1592 return ERR_PTR(-ENODEV);
1598 static const struct nla_policy macsec_genl_policy[NUM_MACSEC_ATTR] = {
1599 [MACSEC_ATTR_IFINDEX] = { .type = NLA_U32 },
1600 [MACSEC_ATTR_RXSC_CONFIG] = { .type = NLA_NESTED },
1601 [MACSEC_ATTR_SA_CONFIG] = { .type = NLA_NESTED },
1602 [MACSEC_ATTR_OFFLOAD] = { .type = NLA_NESTED },
1605 static const struct nla_policy macsec_genl_rxsc_policy[NUM_MACSEC_RXSC_ATTR] = {
1606 [MACSEC_RXSC_ATTR_SCI] = { .type = NLA_U64 },
1607 [MACSEC_RXSC_ATTR_ACTIVE] = { .type = NLA_U8 },
1610 static const struct nla_policy macsec_genl_sa_policy[NUM_MACSEC_SA_ATTR] = {
1611 [MACSEC_SA_ATTR_AN] = { .type = NLA_U8 },
1612 [MACSEC_SA_ATTR_ACTIVE] = { .type = NLA_U8 },
1613 [MACSEC_SA_ATTR_PN] = { .type = NLA_MIN_LEN, .len = 4 },
1614 [MACSEC_SA_ATTR_KEYID] = { .type = NLA_BINARY,
1615 .len = MACSEC_KEYID_LEN, },
1616 [MACSEC_SA_ATTR_KEY] = { .type = NLA_BINARY,
1617 .len = MACSEC_MAX_KEY_LEN, },
1618 [MACSEC_SA_ATTR_SSCI] = { .type = NLA_U32 },
1619 [MACSEC_SA_ATTR_SALT] = { .type = NLA_BINARY,
1620 .len = MACSEC_SALT_LEN, },
1623 static const struct nla_policy macsec_genl_offload_policy[NUM_MACSEC_OFFLOAD_ATTR] = {
1624 [MACSEC_OFFLOAD_ATTR_TYPE] = { .type = NLA_U8 },
1627 /* Offloads an operation to a device driver */
1628 static int macsec_offload(int (* const func)(struct macsec_context *),
1629 struct macsec_context *ctx)
1633 if (unlikely(!func))
1636 if (ctx->offload == MACSEC_OFFLOAD_PHY)
1637 mutex_lock(&ctx->phydev->lock);
1639 /* Phase I: prepare. The drive should fail here if there are going to be
1640 * issues in the commit phase.
1642 ctx->prepare = true;
1647 /* Phase II: commit. This step cannot fail. */
1648 ctx->prepare = false;
1650 /* This should never happen: commit is not allowed to fail */
1652 WARN(1, "MACsec offloading commit failed (%d)\n", ret);
1655 if (ctx->offload == MACSEC_OFFLOAD_PHY)
1656 mutex_unlock(&ctx->phydev->lock);
1661 static int parse_sa_config(struct nlattr **attrs, struct nlattr **tb_sa)
1663 if (!attrs[MACSEC_ATTR_SA_CONFIG])
1666 if (nla_parse_nested_deprecated(tb_sa, MACSEC_SA_ATTR_MAX, attrs[MACSEC_ATTR_SA_CONFIG], macsec_genl_sa_policy, NULL))
1672 static int parse_rxsc_config(struct nlattr **attrs, struct nlattr **tb_rxsc)
1674 if (!attrs[MACSEC_ATTR_RXSC_CONFIG])
1677 if (nla_parse_nested_deprecated(tb_rxsc, MACSEC_RXSC_ATTR_MAX, attrs[MACSEC_ATTR_RXSC_CONFIG], macsec_genl_rxsc_policy, NULL))
1683 static bool validate_add_rxsa(struct nlattr **attrs)
1685 if (!attrs[MACSEC_SA_ATTR_AN] ||
1686 !attrs[MACSEC_SA_ATTR_KEY] ||
1687 !attrs[MACSEC_SA_ATTR_KEYID])
1690 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
1693 if (attrs[MACSEC_SA_ATTR_PN] &&
1694 *(u64 *)nla_data(attrs[MACSEC_SA_ATTR_PN]) == 0)
1697 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
1698 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
1702 if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN)
1708 static int macsec_add_rxsa(struct sk_buff *skb, struct genl_info *info)
1710 struct net_device *dev;
1711 struct nlattr **attrs = info->attrs;
1712 struct macsec_secy *secy;
1713 struct macsec_rx_sc *rx_sc;
1714 struct macsec_rx_sa *rx_sa;
1715 unsigned char assoc_num;
1717 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1718 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1721 if (!attrs[MACSEC_ATTR_IFINDEX])
1724 if (parse_sa_config(attrs, tb_sa))
1727 if (parse_rxsc_config(attrs, tb_rxsc))
1730 if (!validate_add_rxsa(tb_sa))
1734 rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy);
1735 if (IS_ERR(rx_sc)) {
1737 return PTR_ERR(rx_sc);
1740 assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1742 if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) {
1743 pr_notice("macsec: nl: add_rxsa: bad key length: %d != %d\n",
1744 nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len);
1749 pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
1750 if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
1751 pr_notice("macsec: nl: add_rxsa: bad pn length: %d != %d\n",
1752 nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
1758 if (!tb_sa[MACSEC_SA_ATTR_SSCI] || !tb_sa[MACSEC_SA_ATTR_SALT]) {
1763 if (nla_len(tb_sa[MACSEC_SA_ATTR_SALT]) != MACSEC_SALT_LEN) {
1764 pr_notice("macsec: nl: add_rxsa: bad salt length: %d != %d\n",
1765 nla_len(tb_sa[MACSEC_SA_ATTR_SALT]),
1766 MACSEC_SA_ATTR_SALT);
1772 rx_sa = rtnl_dereference(rx_sc->sa[assoc_num]);
1778 rx_sa = kmalloc(sizeof(*rx_sa), GFP_KERNEL);
1784 err = init_rx_sa(rx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
1785 secy->key_len, secy->icv_len);
1792 if (tb_sa[MACSEC_SA_ATTR_PN]) {
1793 spin_lock_bh(&rx_sa->lock);
1794 rx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
1795 spin_unlock_bh(&rx_sa->lock);
1798 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
1799 rx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
1803 /* If h/w offloading is available, propagate to the device */
1804 if (macsec_is_offloaded(netdev_priv(dev))) {
1805 const struct macsec_ops *ops;
1806 struct macsec_context ctx;
1808 ops = macsec_get_ops(netdev_priv(dev), &ctx);
1814 ctx.sa.assoc_num = assoc_num;
1815 ctx.sa.rx_sa = rx_sa;
1817 memcpy(ctx.sa.key, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
1820 err = macsec_offload(ops->mdo_add_rxsa, &ctx);
1826 rx_sa->ssci = nla_get_ssci(tb_sa[MACSEC_SA_ATTR_SSCI]);
1827 nla_memcpy(rx_sa->key.salt.bytes, tb_sa[MACSEC_SA_ATTR_SALT],
1831 nla_memcpy(rx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN);
1832 rcu_assign_pointer(rx_sc->sa[assoc_num], rx_sa);
1844 static bool validate_add_rxsc(struct nlattr **attrs)
1846 if (!attrs[MACSEC_RXSC_ATTR_SCI])
1849 if (attrs[MACSEC_RXSC_ATTR_ACTIVE]) {
1850 if (nla_get_u8(attrs[MACSEC_RXSC_ATTR_ACTIVE]) > 1)
1857 static int macsec_add_rxsc(struct sk_buff *skb, struct genl_info *info)
1859 struct net_device *dev;
1860 sci_t sci = MACSEC_UNDEF_SCI;
1861 struct nlattr **attrs = info->attrs;
1862 struct macsec_rx_sc *rx_sc;
1863 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1864 struct macsec_secy *secy;
1868 if (!attrs[MACSEC_ATTR_IFINDEX])
1871 if (parse_rxsc_config(attrs, tb_rxsc))
1874 if (!validate_add_rxsc(tb_rxsc))
1878 dev = get_dev_from_nl(genl_info_net(info), attrs);
1881 return PTR_ERR(dev);
1884 secy = &macsec_priv(dev)->secy;
1885 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1887 rx_sc = create_rx_sc(dev, sci);
1888 if (IS_ERR(rx_sc)) {
1890 return PTR_ERR(rx_sc);
1893 was_active = rx_sc->active;
1894 if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE])
1895 rx_sc->active = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]);
1897 if (macsec_is_offloaded(netdev_priv(dev))) {
1898 const struct macsec_ops *ops;
1899 struct macsec_context ctx;
1901 ops = macsec_get_ops(netdev_priv(dev), &ctx);
1910 ret = macsec_offload(ops->mdo_add_rxsc, &ctx);
1920 rx_sc->active = was_active;
1925 static bool validate_add_txsa(struct nlattr **attrs)
1927 if (!attrs[MACSEC_SA_ATTR_AN] ||
1928 !attrs[MACSEC_SA_ATTR_PN] ||
1929 !attrs[MACSEC_SA_ATTR_KEY] ||
1930 !attrs[MACSEC_SA_ATTR_KEYID])
1933 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
1936 if (nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0)
1939 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
1940 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
1944 if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN)
1950 static int macsec_add_txsa(struct sk_buff *skb, struct genl_info *info)
1952 struct net_device *dev;
1953 struct nlattr **attrs = info->attrs;
1954 struct macsec_secy *secy;
1955 struct macsec_tx_sc *tx_sc;
1956 struct macsec_tx_sa *tx_sa;
1957 unsigned char assoc_num;
1959 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1960 bool was_operational;
1963 if (!attrs[MACSEC_ATTR_IFINDEX])
1966 if (parse_sa_config(attrs, tb_sa))
1969 if (!validate_add_txsa(tb_sa))
1973 dev = get_dev_from_nl(genl_info_net(info), attrs);
1976 return PTR_ERR(dev);
1979 secy = &macsec_priv(dev)->secy;
1980 tx_sc = &secy->tx_sc;
1982 assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1984 if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) {
1985 pr_notice("macsec: nl: add_txsa: bad key length: %d != %d\n",
1986 nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len);
1991 pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
1992 if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
1993 pr_notice("macsec: nl: add_txsa: bad pn length: %d != %d\n",
1994 nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
2000 if (!tb_sa[MACSEC_SA_ATTR_SSCI] || !tb_sa[MACSEC_SA_ATTR_SALT]) {
2005 if (nla_len(tb_sa[MACSEC_SA_ATTR_SALT]) != MACSEC_SALT_LEN) {
2006 pr_notice("macsec: nl: add_txsa: bad salt length: %d != %d\n",
2007 nla_len(tb_sa[MACSEC_SA_ATTR_SALT]),
2008 MACSEC_SA_ATTR_SALT);
2014 tx_sa = rtnl_dereference(tx_sc->sa[assoc_num]);
2020 tx_sa = kmalloc(sizeof(*tx_sa), GFP_KERNEL);
2026 err = init_tx_sa(tx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
2027 secy->key_len, secy->icv_len);
2034 spin_lock_bh(&tx_sa->lock);
2035 tx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
2036 spin_unlock_bh(&tx_sa->lock);
2038 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2039 tx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2041 was_operational = secy->operational;
2042 if (assoc_num == tx_sc->encoding_sa && tx_sa->active)
2043 secy->operational = true;
2045 /* If h/w offloading is available, propagate to the device */
2046 if (macsec_is_offloaded(netdev_priv(dev))) {
2047 const struct macsec_ops *ops;
2048 struct macsec_context ctx;
2050 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2056 ctx.sa.assoc_num = assoc_num;
2057 ctx.sa.tx_sa = tx_sa;
2059 memcpy(ctx.sa.key, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
2062 err = macsec_offload(ops->mdo_add_txsa, &ctx);
2068 tx_sa->ssci = nla_get_ssci(tb_sa[MACSEC_SA_ATTR_SSCI]);
2069 nla_memcpy(tx_sa->key.salt.bytes, tb_sa[MACSEC_SA_ATTR_SALT],
2073 nla_memcpy(tx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN);
2074 rcu_assign_pointer(tx_sc->sa[assoc_num], tx_sa);
2081 secy->operational = was_operational;
2087 static int macsec_del_rxsa(struct sk_buff *skb, struct genl_info *info)
2089 struct nlattr **attrs = info->attrs;
2090 struct net_device *dev;
2091 struct macsec_secy *secy;
2092 struct macsec_rx_sc *rx_sc;
2093 struct macsec_rx_sa *rx_sa;
2095 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2096 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2099 if (!attrs[MACSEC_ATTR_IFINDEX])
2102 if (parse_sa_config(attrs, tb_sa))
2105 if (parse_rxsc_config(attrs, tb_rxsc))
2109 rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa,
2110 &dev, &secy, &rx_sc, &assoc_num);
2111 if (IS_ERR(rx_sa)) {
2113 return PTR_ERR(rx_sa);
2116 if (rx_sa->active) {
2121 /* If h/w offloading is available, propagate to the device */
2122 if (macsec_is_offloaded(netdev_priv(dev))) {
2123 const struct macsec_ops *ops;
2124 struct macsec_context ctx;
2126 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2132 ctx.sa.assoc_num = assoc_num;
2133 ctx.sa.rx_sa = rx_sa;
2136 ret = macsec_offload(ops->mdo_del_rxsa, &ctx);
2141 RCU_INIT_POINTER(rx_sc->sa[assoc_num], NULL);
2153 static int macsec_del_rxsc(struct sk_buff *skb, struct genl_info *info)
2155 struct nlattr **attrs = info->attrs;
2156 struct net_device *dev;
2157 struct macsec_secy *secy;
2158 struct macsec_rx_sc *rx_sc;
2160 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2163 if (!attrs[MACSEC_ATTR_IFINDEX])
2166 if (parse_rxsc_config(attrs, tb_rxsc))
2169 if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI])
2173 dev = get_dev_from_nl(genl_info_net(info), info->attrs);
2176 return PTR_ERR(dev);
2179 secy = &macsec_priv(dev)->secy;
2180 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
2182 rx_sc = del_rx_sc(secy, sci);
2188 /* If h/w offloading is available, propagate to the device */
2189 if (macsec_is_offloaded(netdev_priv(dev))) {
2190 const struct macsec_ops *ops;
2191 struct macsec_context ctx;
2193 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2201 ret = macsec_offload(ops->mdo_del_rxsc, &ctx);
2216 static int macsec_del_txsa(struct sk_buff *skb, struct genl_info *info)
2218 struct nlattr **attrs = info->attrs;
2219 struct net_device *dev;
2220 struct macsec_secy *secy;
2221 struct macsec_tx_sc *tx_sc;
2222 struct macsec_tx_sa *tx_sa;
2224 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2227 if (!attrs[MACSEC_ATTR_IFINDEX])
2230 if (parse_sa_config(attrs, tb_sa))
2234 tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa,
2235 &dev, &secy, &tx_sc, &assoc_num);
2236 if (IS_ERR(tx_sa)) {
2238 return PTR_ERR(tx_sa);
2241 if (tx_sa->active) {
2246 /* If h/w offloading is available, propagate to the device */
2247 if (macsec_is_offloaded(netdev_priv(dev))) {
2248 const struct macsec_ops *ops;
2249 struct macsec_context ctx;
2251 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2257 ctx.sa.assoc_num = assoc_num;
2258 ctx.sa.tx_sa = tx_sa;
2261 ret = macsec_offload(ops->mdo_del_txsa, &ctx);
2266 RCU_INIT_POINTER(tx_sc->sa[assoc_num], NULL);
2278 static bool validate_upd_sa(struct nlattr **attrs)
2280 if (!attrs[MACSEC_SA_ATTR_AN] ||
2281 attrs[MACSEC_SA_ATTR_KEY] ||
2282 attrs[MACSEC_SA_ATTR_KEYID] ||
2283 attrs[MACSEC_SA_ATTR_SSCI] ||
2284 attrs[MACSEC_SA_ATTR_SALT])
2287 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
2290 if (attrs[MACSEC_SA_ATTR_PN] && nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0)
2293 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
2294 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
2301 static int macsec_upd_txsa(struct sk_buff *skb, struct genl_info *info)
2303 struct nlattr **attrs = info->attrs;
2304 struct net_device *dev;
2305 struct macsec_secy *secy;
2306 struct macsec_tx_sc *tx_sc;
2307 struct macsec_tx_sa *tx_sa;
2309 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2310 bool was_operational, was_active;
2316 if (!attrs[MACSEC_ATTR_IFINDEX])
2319 if (parse_sa_config(attrs, tb_sa))
2322 if (!validate_upd_sa(tb_sa))
2326 tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa,
2327 &dev, &secy, &tx_sc, &assoc_num);
2328 if (IS_ERR(tx_sa)) {
2330 return PTR_ERR(tx_sa);
2333 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2336 pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
2337 if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
2338 pr_notice("macsec: nl: upd_txsa: bad pn length: %d != %d\n",
2339 nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
2344 spin_lock_bh(&tx_sa->lock);
2345 prev_pn = tx_sa->next_pn_halves;
2346 tx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
2347 spin_unlock_bh(&tx_sa->lock);
2350 was_active = tx_sa->active;
2351 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2352 tx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2354 was_operational = secy->operational;
2355 if (assoc_num == tx_sc->encoding_sa)
2356 secy->operational = tx_sa->active;
2358 /* If h/w offloading is available, propagate to the device */
2359 if (macsec_is_offloaded(netdev_priv(dev))) {
2360 const struct macsec_ops *ops;
2361 struct macsec_context ctx;
2363 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2369 ctx.sa.assoc_num = assoc_num;
2370 ctx.sa.tx_sa = tx_sa;
2373 ret = macsec_offload(ops->mdo_upd_txsa, &ctx);
2383 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2384 spin_lock_bh(&tx_sa->lock);
2385 tx_sa->next_pn_halves = prev_pn;
2386 spin_unlock_bh(&tx_sa->lock);
2388 tx_sa->active = was_active;
2389 secy->operational = was_operational;
2394 static int macsec_upd_rxsa(struct sk_buff *skb, struct genl_info *info)
2396 struct nlattr **attrs = info->attrs;
2397 struct net_device *dev;
2398 struct macsec_secy *secy;
2399 struct macsec_rx_sc *rx_sc;
2400 struct macsec_rx_sa *rx_sa;
2402 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2403 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2410 if (!attrs[MACSEC_ATTR_IFINDEX])
2413 if (parse_rxsc_config(attrs, tb_rxsc))
2416 if (parse_sa_config(attrs, tb_sa))
2419 if (!validate_upd_sa(tb_sa))
2423 rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa,
2424 &dev, &secy, &rx_sc, &assoc_num);
2425 if (IS_ERR(rx_sa)) {
2427 return PTR_ERR(rx_sa);
2430 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2433 pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
2434 if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
2435 pr_notice("macsec: nl: upd_rxsa: bad pn length: %d != %d\n",
2436 nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
2441 spin_lock_bh(&rx_sa->lock);
2442 prev_pn = rx_sa->next_pn_halves;
2443 rx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
2444 spin_unlock_bh(&rx_sa->lock);
2447 was_active = rx_sa->active;
2448 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2449 rx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2451 /* If h/w offloading is available, propagate to the device */
2452 if (macsec_is_offloaded(netdev_priv(dev))) {
2453 const struct macsec_ops *ops;
2454 struct macsec_context ctx;
2456 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2462 ctx.sa.assoc_num = assoc_num;
2463 ctx.sa.rx_sa = rx_sa;
2466 ret = macsec_offload(ops->mdo_upd_rxsa, &ctx);
2475 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2476 spin_lock_bh(&rx_sa->lock);
2477 rx_sa->next_pn_halves = prev_pn;
2478 spin_unlock_bh(&rx_sa->lock);
2480 rx_sa->active = was_active;
2485 static int macsec_upd_rxsc(struct sk_buff *skb, struct genl_info *info)
2487 struct nlattr **attrs = info->attrs;
2488 struct net_device *dev;
2489 struct macsec_secy *secy;
2490 struct macsec_rx_sc *rx_sc;
2491 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2492 unsigned int prev_n_rx_sc;
2496 if (!attrs[MACSEC_ATTR_IFINDEX])
2499 if (parse_rxsc_config(attrs, tb_rxsc))
2502 if (!validate_add_rxsc(tb_rxsc))
2506 rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy);
2507 if (IS_ERR(rx_sc)) {
2509 return PTR_ERR(rx_sc);
2512 was_active = rx_sc->active;
2513 prev_n_rx_sc = secy->n_rx_sc;
2514 if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]) {
2515 bool new = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]);
2517 if (rx_sc->active != new)
2518 secy->n_rx_sc += new ? 1 : -1;
2520 rx_sc->active = new;
2523 /* If h/w offloading is available, propagate to the device */
2524 if (macsec_is_offloaded(netdev_priv(dev))) {
2525 const struct macsec_ops *ops;
2526 struct macsec_context ctx;
2528 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2537 ret = macsec_offload(ops->mdo_upd_rxsc, &ctx);
2547 secy->n_rx_sc = prev_n_rx_sc;
2548 rx_sc->active = was_active;
2553 static bool macsec_is_configured(struct macsec_dev *macsec)
2555 struct macsec_secy *secy = &macsec->secy;
2556 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
2559 if (secy->n_rx_sc > 0)
2562 for (i = 0; i < MACSEC_NUM_AN; i++)
2569 static int macsec_upd_offload(struct sk_buff *skb, struct genl_info *info)
2571 struct nlattr *tb_offload[MACSEC_OFFLOAD_ATTR_MAX + 1];
2572 enum macsec_offload offload, prev_offload;
2573 int (*func)(struct macsec_context *ctx);
2574 struct nlattr **attrs = info->attrs;
2575 struct net_device *dev;
2576 const struct macsec_ops *ops;
2577 struct macsec_context ctx;
2578 struct macsec_dev *macsec;
2581 if (!attrs[MACSEC_ATTR_IFINDEX])
2584 if (!attrs[MACSEC_ATTR_OFFLOAD])
2587 if (nla_parse_nested_deprecated(tb_offload, MACSEC_OFFLOAD_ATTR_MAX,
2588 attrs[MACSEC_ATTR_OFFLOAD],
2589 macsec_genl_offload_policy, NULL))
2592 dev = get_dev_from_nl(genl_info_net(info), attrs);
2594 return PTR_ERR(dev);
2595 macsec = macsec_priv(dev);
2597 if (!tb_offload[MACSEC_OFFLOAD_ATTR_TYPE])
2600 offload = nla_get_u8(tb_offload[MACSEC_OFFLOAD_ATTR_TYPE]);
2601 if (macsec->offload == offload)
2604 /* Check if the offloading mode is supported by the underlying layers */
2605 if (offload != MACSEC_OFFLOAD_OFF &&
2606 !macsec_check_offload(offload, macsec))
2609 /* Check if the net device is busy. */
2610 if (netif_running(dev))
2615 prev_offload = macsec->offload;
2616 macsec->offload = offload;
2618 /* Check if the device already has rules configured: we do not support
2621 if (macsec_is_configured(macsec)) {
2626 ops = __macsec_get_ops(offload == MACSEC_OFFLOAD_OFF ? prev_offload : offload,
2633 if (prev_offload == MACSEC_OFFLOAD_OFF)
2634 func = ops->mdo_add_secy;
2636 func = ops->mdo_del_secy;
2638 ctx.secy = &macsec->secy;
2639 ret = macsec_offload(func, &ctx);
2644 /* Force features update, since they are different for SW MACSec and
2645 * HW offloading cases.
2647 netdev_update_features(dev);
2651 macsec->offload = prev_offload;
2657 static void get_tx_sa_stats(struct net_device *dev, int an,
2658 struct macsec_tx_sa *tx_sa,
2659 struct macsec_tx_sa_stats *sum)
2661 struct macsec_dev *macsec = macsec_priv(dev);
2664 /* If h/w offloading is available, propagate to the device */
2665 if (macsec_is_offloaded(macsec)) {
2666 const struct macsec_ops *ops;
2667 struct macsec_context ctx;
2669 ops = macsec_get_ops(macsec, &ctx);
2671 ctx.sa.assoc_num = an;
2672 ctx.sa.tx_sa = tx_sa;
2673 ctx.stats.tx_sa_stats = sum;
2674 ctx.secy = &macsec_priv(dev)->secy;
2675 macsec_offload(ops->mdo_get_tx_sa_stats, &ctx);
2680 for_each_possible_cpu(cpu) {
2681 const struct macsec_tx_sa_stats *stats =
2682 per_cpu_ptr(tx_sa->stats, cpu);
2684 sum->OutPktsProtected += stats->OutPktsProtected;
2685 sum->OutPktsEncrypted += stats->OutPktsEncrypted;
2689 static int copy_tx_sa_stats(struct sk_buff *skb, struct macsec_tx_sa_stats *sum)
2691 if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_PROTECTED,
2692 sum->OutPktsProtected) ||
2693 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_ENCRYPTED,
2694 sum->OutPktsEncrypted))
2700 static void get_rx_sa_stats(struct net_device *dev,
2701 struct macsec_rx_sc *rx_sc, int an,
2702 struct macsec_rx_sa *rx_sa,
2703 struct macsec_rx_sa_stats *sum)
2705 struct macsec_dev *macsec = macsec_priv(dev);
2708 /* If h/w offloading is available, propagate to the device */
2709 if (macsec_is_offloaded(macsec)) {
2710 const struct macsec_ops *ops;
2711 struct macsec_context ctx;
2713 ops = macsec_get_ops(macsec, &ctx);
2715 ctx.sa.assoc_num = an;
2716 ctx.sa.rx_sa = rx_sa;
2717 ctx.stats.rx_sa_stats = sum;
2718 ctx.secy = &macsec_priv(dev)->secy;
2720 macsec_offload(ops->mdo_get_rx_sa_stats, &ctx);
2725 for_each_possible_cpu(cpu) {
2726 const struct macsec_rx_sa_stats *stats =
2727 per_cpu_ptr(rx_sa->stats, cpu);
2729 sum->InPktsOK += stats->InPktsOK;
2730 sum->InPktsInvalid += stats->InPktsInvalid;
2731 sum->InPktsNotValid += stats->InPktsNotValid;
2732 sum->InPktsNotUsingSA += stats->InPktsNotUsingSA;
2733 sum->InPktsUnusedSA += stats->InPktsUnusedSA;
2737 static int copy_rx_sa_stats(struct sk_buff *skb,
2738 struct macsec_rx_sa_stats *sum)
2740 if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_OK, sum->InPktsOK) ||
2741 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_INVALID,
2742 sum->InPktsInvalid) ||
2743 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_VALID,
2744 sum->InPktsNotValid) ||
2745 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_USING_SA,
2746 sum->InPktsNotUsingSA) ||
2747 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_UNUSED_SA,
2748 sum->InPktsUnusedSA))
2754 static void get_rx_sc_stats(struct net_device *dev,
2755 struct macsec_rx_sc *rx_sc,
2756 struct macsec_rx_sc_stats *sum)
2758 struct macsec_dev *macsec = macsec_priv(dev);
2761 /* If h/w offloading is available, propagate to the device */
2762 if (macsec_is_offloaded(macsec)) {
2763 const struct macsec_ops *ops;
2764 struct macsec_context ctx;
2766 ops = macsec_get_ops(macsec, &ctx);
2768 ctx.stats.rx_sc_stats = sum;
2769 ctx.secy = &macsec_priv(dev)->secy;
2771 macsec_offload(ops->mdo_get_rx_sc_stats, &ctx);
2776 for_each_possible_cpu(cpu) {
2777 const struct pcpu_rx_sc_stats *stats;
2778 struct macsec_rx_sc_stats tmp;
2781 stats = per_cpu_ptr(rx_sc->stats, cpu);
2783 start = u64_stats_fetch_begin_irq(&stats->syncp);
2784 memcpy(&tmp, &stats->stats, sizeof(tmp));
2785 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2787 sum->InOctetsValidated += tmp.InOctetsValidated;
2788 sum->InOctetsDecrypted += tmp.InOctetsDecrypted;
2789 sum->InPktsUnchecked += tmp.InPktsUnchecked;
2790 sum->InPktsDelayed += tmp.InPktsDelayed;
2791 sum->InPktsOK += tmp.InPktsOK;
2792 sum->InPktsInvalid += tmp.InPktsInvalid;
2793 sum->InPktsLate += tmp.InPktsLate;
2794 sum->InPktsNotValid += tmp.InPktsNotValid;
2795 sum->InPktsNotUsingSA += tmp.InPktsNotUsingSA;
2796 sum->InPktsUnusedSA += tmp.InPktsUnusedSA;
2800 static int copy_rx_sc_stats(struct sk_buff *skb, struct macsec_rx_sc_stats *sum)
2802 if (nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_VALIDATED,
2803 sum->InOctetsValidated,
2804 MACSEC_RXSC_STATS_ATTR_PAD) ||
2805 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_DECRYPTED,
2806 sum->InOctetsDecrypted,
2807 MACSEC_RXSC_STATS_ATTR_PAD) ||
2808 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNCHECKED,
2809 sum->InPktsUnchecked,
2810 MACSEC_RXSC_STATS_ATTR_PAD) ||
2811 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_DELAYED,
2813 MACSEC_RXSC_STATS_ATTR_PAD) ||
2814 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_OK,
2816 MACSEC_RXSC_STATS_ATTR_PAD) ||
2817 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_INVALID,
2819 MACSEC_RXSC_STATS_ATTR_PAD) ||
2820 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_LATE,
2822 MACSEC_RXSC_STATS_ATTR_PAD) ||
2823 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_VALID,
2824 sum->InPktsNotValid,
2825 MACSEC_RXSC_STATS_ATTR_PAD) ||
2826 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_USING_SA,
2827 sum->InPktsNotUsingSA,
2828 MACSEC_RXSC_STATS_ATTR_PAD) ||
2829 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNUSED_SA,
2830 sum->InPktsUnusedSA,
2831 MACSEC_RXSC_STATS_ATTR_PAD))
2837 static void get_tx_sc_stats(struct net_device *dev,
2838 struct macsec_tx_sc_stats *sum)
2840 struct macsec_dev *macsec = macsec_priv(dev);
2843 /* If h/w offloading is available, propagate to the device */
2844 if (macsec_is_offloaded(macsec)) {
2845 const struct macsec_ops *ops;
2846 struct macsec_context ctx;
2848 ops = macsec_get_ops(macsec, &ctx);
2850 ctx.stats.tx_sc_stats = sum;
2851 ctx.secy = &macsec_priv(dev)->secy;
2852 macsec_offload(ops->mdo_get_tx_sc_stats, &ctx);
2857 for_each_possible_cpu(cpu) {
2858 const struct pcpu_tx_sc_stats *stats;
2859 struct macsec_tx_sc_stats tmp;
2862 stats = per_cpu_ptr(macsec_priv(dev)->secy.tx_sc.stats, cpu);
2864 start = u64_stats_fetch_begin_irq(&stats->syncp);
2865 memcpy(&tmp, &stats->stats, sizeof(tmp));
2866 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2868 sum->OutPktsProtected += tmp.OutPktsProtected;
2869 sum->OutPktsEncrypted += tmp.OutPktsEncrypted;
2870 sum->OutOctetsProtected += tmp.OutOctetsProtected;
2871 sum->OutOctetsEncrypted += tmp.OutOctetsEncrypted;
2875 static int copy_tx_sc_stats(struct sk_buff *skb, struct macsec_tx_sc_stats *sum)
2877 if (nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_PROTECTED,
2878 sum->OutPktsProtected,
2879 MACSEC_TXSC_STATS_ATTR_PAD) ||
2880 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_ENCRYPTED,
2881 sum->OutPktsEncrypted,
2882 MACSEC_TXSC_STATS_ATTR_PAD) ||
2883 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_PROTECTED,
2884 sum->OutOctetsProtected,
2885 MACSEC_TXSC_STATS_ATTR_PAD) ||
2886 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_ENCRYPTED,
2887 sum->OutOctetsEncrypted,
2888 MACSEC_TXSC_STATS_ATTR_PAD))
2894 static void get_secy_stats(struct net_device *dev, struct macsec_dev_stats *sum)
2896 struct macsec_dev *macsec = macsec_priv(dev);
2899 /* If h/w offloading is available, propagate to the device */
2900 if (macsec_is_offloaded(macsec)) {
2901 const struct macsec_ops *ops;
2902 struct macsec_context ctx;
2904 ops = macsec_get_ops(macsec, &ctx);
2906 ctx.stats.dev_stats = sum;
2907 ctx.secy = &macsec_priv(dev)->secy;
2908 macsec_offload(ops->mdo_get_dev_stats, &ctx);
2913 for_each_possible_cpu(cpu) {
2914 const struct pcpu_secy_stats *stats;
2915 struct macsec_dev_stats tmp;
2918 stats = per_cpu_ptr(macsec_priv(dev)->stats, cpu);
2920 start = u64_stats_fetch_begin_irq(&stats->syncp);
2921 memcpy(&tmp, &stats->stats, sizeof(tmp));
2922 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2924 sum->OutPktsUntagged += tmp.OutPktsUntagged;
2925 sum->InPktsUntagged += tmp.InPktsUntagged;
2926 sum->OutPktsTooLong += tmp.OutPktsTooLong;
2927 sum->InPktsNoTag += tmp.InPktsNoTag;
2928 sum->InPktsBadTag += tmp.InPktsBadTag;
2929 sum->InPktsUnknownSCI += tmp.InPktsUnknownSCI;
2930 sum->InPktsNoSCI += tmp.InPktsNoSCI;
2931 sum->InPktsOverrun += tmp.InPktsOverrun;
2935 static int copy_secy_stats(struct sk_buff *skb, struct macsec_dev_stats *sum)
2937 if (nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_UNTAGGED,
2938 sum->OutPktsUntagged,
2939 MACSEC_SECY_STATS_ATTR_PAD) ||
2940 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNTAGGED,
2941 sum->InPktsUntagged,
2942 MACSEC_SECY_STATS_ATTR_PAD) ||
2943 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_TOO_LONG,
2944 sum->OutPktsTooLong,
2945 MACSEC_SECY_STATS_ATTR_PAD) ||
2946 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_TAG,
2948 MACSEC_SECY_STATS_ATTR_PAD) ||
2949 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_BAD_TAG,
2951 MACSEC_SECY_STATS_ATTR_PAD) ||
2952 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNKNOWN_SCI,
2953 sum->InPktsUnknownSCI,
2954 MACSEC_SECY_STATS_ATTR_PAD) ||
2955 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_SCI,
2957 MACSEC_SECY_STATS_ATTR_PAD) ||
2958 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_OVERRUN,
2960 MACSEC_SECY_STATS_ATTR_PAD))
2966 static int nla_put_secy(struct macsec_secy *secy, struct sk_buff *skb)
2968 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
2969 struct nlattr *secy_nest = nla_nest_start_noflag(skb,
2976 switch (secy->key_len) {
2977 case MACSEC_GCM_AES_128_SAK_LEN:
2978 csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_128 : MACSEC_DEFAULT_CIPHER_ID;
2980 case MACSEC_GCM_AES_256_SAK_LEN:
2981 csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_256 : MACSEC_CIPHER_ID_GCM_AES_256;
2987 if (nla_put_sci(skb, MACSEC_SECY_ATTR_SCI, secy->sci,
2988 MACSEC_SECY_ATTR_PAD) ||
2989 nla_put_u64_64bit(skb, MACSEC_SECY_ATTR_CIPHER_SUITE,
2990 csid, MACSEC_SECY_ATTR_PAD) ||
2991 nla_put_u8(skb, MACSEC_SECY_ATTR_ICV_LEN, secy->icv_len) ||
2992 nla_put_u8(skb, MACSEC_SECY_ATTR_OPER, secy->operational) ||
2993 nla_put_u8(skb, MACSEC_SECY_ATTR_PROTECT, secy->protect_frames) ||
2994 nla_put_u8(skb, MACSEC_SECY_ATTR_REPLAY, secy->replay_protect) ||
2995 nla_put_u8(skb, MACSEC_SECY_ATTR_VALIDATE, secy->validate_frames) ||
2996 nla_put_u8(skb, MACSEC_SECY_ATTR_ENCRYPT, tx_sc->encrypt) ||
2997 nla_put_u8(skb, MACSEC_SECY_ATTR_INC_SCI, tx_sc->send_sci) ||
2998 nla_put_u8(skb, MACSEC_SECY_ATTR_ES, tx_sc->end_station) ||
2999 nla_put_u8(skb, MACSEC_SECY_ATTR_SCB, tx_sc->scb) ||
3000 nla_put_u8(skb, MACSEC_SECY_ATTR_ENCODING_SA, tx_sc->encoding_sa))
3003 if (secy->replay_protect) {
3004 if (nla_put_u32(skb, MACSEC_SECY_ATTR_WINDOW, secy->replay_window))
3008 nla_nest_end(skb, secy_nest);
3012 nla_nest_cancel(skb, secy_nest);
3016 static noinline_for_stack int
3017 dump_secy(struct macsec_secy *secy, struct net_device *dev,
3018 struct sk_buff *skb, struct netlink_callback *cb)
3020 struct macsec_tx_sc_stats tx_sc_stats = {0, };
3021 struct macsec_tx_sa_stats tx_sa_stats = {0, };
3022 struct macsec_rx_sc_stats rx_sc_stats = {0, };
3023 struct macsec_rx_sa_stats rx_sa_stats = {0, };
3024 struct macsec_dev *macsec = netdev_priv(dev);
3025 struct macsec_dev_stats dev_stats = {0, };
3026 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
3027 struct nlattr *txsa_list, *rxsc_list;
3028 struct macsec_rx_sc *rx_sc;
3029 struct nlattr *attr;
3033 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
3034 &macsec_fam, NLM_F_MULTI, MACSEC_CMD_GET_TXSC);
3038 genl_dump_check_consistent(cb, hdr);
3040 if (nla_put_u32(skb, MACSEC_ATTR_IFINDEX, dev->ifindex))
3041 goto nla_put_failure;
3043 attr = nla_nest_start_noflag(skb, MACSEC_ATTR_OFFLOAD);
3045 goto nla_put_failure;
3046 if (nla_put_u8(skb, MACSEC_OFFLOAD_ATTR_TYPE, macsec->offload))
3047 goto nla_put_failure;
3048 nla_nest_end(skb, attr);
3050 if (nla_put_secy(secy, skb))
3051 goto nla_put_failure;
3053 attr = nla_nest_start_noflag(skb, MACSEC_ATTR_TXSC_STATS);
3055 goto nla_put_failure;
3057 get_tx_sc_stats(dev, &tx_sc_stats);
3058 if (copy_tx_sc_stats(skb, &tx_sc_stats)) {
3059 nla_nest_cancel(skb, attr);
3060 goto nla_put_failure;
3062 nla_nest_end(skb, attr);
3064 attr = nla_nest_start_noflag(skb, MACSEC_ATTR_SECY_STATS);
3066 goto nla_put_failure;
3067 get_secy_stats(dev, &dev_stats);
3068 if (copy_secy_stats(skb, &dev_stats)) {
3069 nla_nest_cancel(skb, attr);
3070 goto nla_put_failure;
3072 nla_nest_end(skb, attr);
3074 txsa_list = nla_nest_start_noflag(skb, MACSEC_ATTR_TXSA_LIST);
3076 goto nla_put_failure;
3077 for (i = 0, j = 1; i < MACSEC_NUM_AN; i++) {
3078 struct macsec_tx_sa *tx_sa = rtnl_dereference(tx_sc->sa[i]);
3079 struct nlattr *txsa_nest;
3086 txsa_nest = nla_nest_start_noflag(skb, j++);
3088 nla_nest_cancel(skb, txsa_list);
3089 goto nla_put_failure;
3092 attr = nla_nest_start_noflag(skb, MACSEC_SA_ATTR_STATS);
3094 nla_nest_cancel(skb, txsa_nest);
3095 nla_nest_cancel(skb, txsa_list);
3096 goto nla_put_failure;
3098 memset(&tx_sa_stats, 0, sizeof(tx_sa_stats));
3099 get_tx_sa_stats(dev, i, tx_sa, &tx_sa_stats);
3100 if (copy_tx_sa_stats(skb, &tx_sa_stats)) {
3101 nla_nest_cancel(skb, attr);
3102 nla_nest_cancel(skb, txsa_nest);
3103 nla_nest_cancel(skb, txsa_list);
3104 goto nla_put_failure;
3106 nla_nest_end(skb, attr);
3109 pn = tx_sa->next_pn;
3110 pn_len = MACSEC_XPN_PN_LEN;
3112 pn = tx_sa->next_pn_halves.lower;
3113 pn_len = MACSEC_DEFAULT_PN_LEN;
3116 if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) ||
3117 nla_put(skb, MACSEC_SA_ATTR_PN, pn_len, &pn) ||
3118 nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, tx_sa->key.id) ||
3119 (secy->xpn && nla_put_ssci(skb, MACSEC_SA_ATTR_SSCI, tx_sa->ssci)) ||
3120 nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, tx_sa->active)) {
3121 nla_nest_cancel(skb, txsa_nest);
3122 nla_nest_cancel(skb, txsa_list);
3123 goto nla_put_failure;
3126 nla_nest_end(skb, txsa_nest);
3128 nla_nest_end(skb, txsa_list);
3130 rxsc_list = nla_nest_start_noflag(skb, MACSEC_ATTR_RXSC_LIST);
3132 goto nla_put_failure;
3135 for_each_rxsc_rtnl(secy, rx_sc) {
3137 struct nlattr *rxsa_list;
3138 struct nlattr *rxsc_nest = nla_nest_start_noflag(skb, j++);
3141 nla_nest_cancel(skb, rxsc_list);
3142 goto nla_put_failure;
3145 if (nla_put_u8(skb, MACSEC_RXSC_ATTR_ACTIVE, rx_sc->active) ||
3146 nla_put_sci(skb, MACSEC_RXSC_ATTR_SCI, rx_sc->sci,
3147 MACSEC_RXSC_ATTR_PAD)) {
3148 nla_nest_cancel(skb, rxsc_nest);
3149 nla_nest_cancel(skb, rxsc_list);
3150 goto nla_put_failure;
3153 attr = nla_nest_start_noflag(skb, MACSEC_RXSC_ATTR_STATS);
3155 nla_nest_cancel(skb, rxsc_nest);
3156 nla_nest_cancel(skb, rxsc_list);
3157 goto nla_put_failure;
3159 memset(&rx_sc_stats, 0, sizeof(rx_sc_stats));
3160 get_rx_sc_stats(dev, rx_sc, &rx_sc_stats);
3161 if (copy_rx_sc_stats(skb, &rx_sc_stats)) {
3162 nla_nest_cancel(skb, attr);
3163 nla_nest_cancel(skb, rxsc_nest);
3164 nla_nest_cancel(skb, rxsc_list);
3165 goto nla_put_failure;
3167 nla_nest_end(skb, attr);
3169 rxsa_list = nla_nest_start_noflag(skb,
3170 MACSEC_RXSC_ATTR_SA_LIST);
3172 nla_nest_cancel(skb, rxsc_nest);
3173 nla_nest_cancel(skb, rxsc_list);
3174 goto nla_put_failure;
3177 for (i = 0, k = 1; i < MACSEC_NUM_AN; i++) {
3178 struct macsec_rx_sa *rx_sa = rtnl_dereference(rx_sc->sa[i]);
3179 struct nlattr *rxsa_nest;
3186 rxsa_nest = nla_nest_start_noflag(skb, k++);
3188 nla_nest_cancel(skb, rxsa_list);
3189 nla_nest_cancel(skb, rxsc_nest);
3190 nla_nest_cancel(skb, rxsc_list);
3191 goto nla_put_failure;
3194 attr = nla_nest_start_noflag(skb,
3195 MACSEC_SA_ATTR_STATS);
3197 nla_nest_cancel(skb, rxsa_list);
3198 nla_nest_cancel(skb, rxsc_nest);
3199 nla_nest_cancel(skb, rxsc_list);
3200 goto nla_put_failure;
3202 memset(&rx_sa_stats, 0, sizeof(rx_sa_stats));
3203 get_rx_sa_stats(dev, rx_sc, i, rx_sa, &rx_sa_stats);
3204 if (copy_rx_sa_stats(skb, &rx_sa_stats)) {
3205 nla_nest_cancel(skb, attr);
3206 nla_nest_cancel(skb, rxsa_list);
3207 nla_nest_cancel(skb, rxsc_nest);
3208 nla_nest_cancel(skb, rxsc_list);
3209 goto nla_put_failure;
3211 nla_nest_end(skb, attr);
3214 pn = rx_sa->next_pn;
3215 pn_len = MACSEC_XPN_PN_LEN;
3217 pn = rx_sa->next_pn_halves.lower;
3218 pn_len = MACSEC_DEFAULT_PN_LEN;
3221 if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) ||
3222 nla_put(skb, MACSEC_SA_ATTR_PN, pn_len, &pn) ||
3223 nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, rx_sa->key.id) ||
3224 (secy->xpn && nla_put_ssci(skb, MACSEC_SA_ATTR_SSCI, rx_sa->ssci)) ||
3225 nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, rx_sa->active)) {
3226 nla_nest_cancel(skb, rxsa_nest);
3227 nla_nest_cancel(skb, rxsc_nest);
3228 nla_nest_cancel(skb, rxsc_list);
3229 goto nla_put_failure;
3231 nla_nest_end(skb, rxsa_nest);
3234 nla_nest_end(skb, rxsa_list);
3235 nla_nest_end(skb, rxsc_nest);
3238 nla_nest_end(skb, rxsc_list);
3240 genlmsg_end(skb, hdr);
3245 genlmsg_cancel(skb, hdr);
3249 static int macsec_generation = 1; /* protected by RTNL */
3251 static int macsec_dump_txsc(struct sk_buff *skb, struct netlink_callback *cb)
3253 struct net *net = sock_net(skb->sk);
3254 struct net_device *dev;
3257 dev_idx = cb->args[0];
3262 cb->seq = macsec_generation;
3264 for_each_netdev(net, dev) {
3265 struct macsec_secy *secy;
3270 if (!netif_is_macsec(dev))
3273 secy = &macsec_priv(dev)->secy;
3274 if (dump_secy(secy, dev, skb, cb) < 0)
3286 static const struct genl_ops macsec_genl_ops[] = {
3288 .cmd = MACSEC_CMD_GET_TXSC,
3289 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3290 .dumpit = macsec_dump_txsc,
3293 .cmd = MACSEC_CMD_ADD_RXSC,
3294 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3295 .doit = macsec_add_rxsc,
3296 .flags = GENL_ADMIN_PERM,
3299 .cmd = MACSEC_CMD_DEL_RXSC,
3300 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3301 .doit = macsec_del_rxsc,
3302 .flags = GENL_ADMIN_PERM,
3305 .cmd = MACSEC_CMD_UPD_RXSC,
3306 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3307 .doit = macsec_upd_rxsc,
3308 .flags = GENL_ADMIN_PERM,
3311 .cmd = MACSEC_CMD_ADD_TXSA,
3312 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3313 .doit = macsec_add_txsa,
3314 .flags = GENL_ADMIN_PERM,
3317 .cmd = MACSEC_CMD_DEL_TXSA,
3318 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3319 .doit = macsec_del_txsa,
3320 .flags = GENL_ADMIN_PERM,
3323 .cmd = MACSEC_CMD_UPD_TXSA,
3324 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3325 .doit = macsec_upd_txsa,
3326 .flags = GENL_ADMIN_PERM,
3329 .cmd = MACSEC_CMD_ADD_RXSA,
3330 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3331 .doit = macsec_add_rxsa,
3332 .flags = GENL_ADMIN_PERM,
3335 .cmd = MACSEC_CMD_DEL_RXSA,
3336 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3337 .doit = macsec_del_rxsa,
3338 .flags = GENL_ADMIN_PERM,
3341 .cmd = MACSEC_CMD_UPD_RXSA,
3342 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3343 .doit = macsec_upd_rxsa,
3344 .flags = GENL_ADMIN_PERM,
3347 .cmd = MACSEC_CMD_UPD_OFFLOAD,
3348 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3349 .doit = macsec_upd_offload,
3350 .flags = GENL_ADMIN_PERM,
3354 static struct genl_family macsec_fam __ro_after_init = {
3355 .name = MACSEC_GENL_NAME,
3357 .version = MACSEC_GENL_VERSION,
3358 .maxattr = MACSEC_ATTR_MAX,
3359 .policy = macsec_genl_policy,
3361 .module = THIS_MODULE,
3362 .ops = macsec_genl_ops,
3363 .n_ops = ARRAY_SIZE(macsec_genl_ops),
3366 static netdev_tx_t macsec_start_xmit(struct sk_buff *skb,
3367 struct net_device *dev)
3369 struct macsec_dev *macsec = netdev_priv(dev);
3370 struct macsec_secy *secy = &macsec->secy;
3371 struct pcpu_secy_stats *secy_stats;
3374 if (macsec_is_offloaded(netdev_priv(dev))) {
3375 skb->dev = macsec->real_dev;
3376 return dev_queue_xmit(skb);
3380 if (!secy->protect_frames) {
3381 secy_stats = this_cpu_ptr(macsec->stats);
3382 u64_stats_update_begin(&secy_stats->syncp);
3383 secy_stats->stats.OutPktsUntagged++;
3384 u64_stats_update_end(&secy_stats->syncp);
3385 skb->dev = macsec->real_dev;
3387 ret = dev_queue_xmit(skb);
3388 count_tx(dev, ret, len);
3392 if (!secy->operational) {
3394 dev->stats.tx_dropped++;
3395 return NETDEV_TX_OK;
3398 skb = macsec_encrypt(skb, dev);
3400 if (PTR_ERR(skb) != -EINPROGRESS)
3401 dev->stats.tx_dropped++;
3402 return NETDEV_TX_OK;
3405 macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa);
3407 macsec_encrypt_finish(skb, dev);
3409 ret = dev_queue_xmit(skb);
3410 count_tx(dev, ret, len);
3414 #define SW_MACSEC_FEATURES \
3415 (NETIF_F_SG | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST)
3417 /* If h/w offloading is enabled, use real device features save for
3418 * VLAN_FEATURES - they require additional ops
3419 * HW_MACSEC - no reason to report it
3421 #define REAL_DEV_FEATURES(dev) \
3422 ((dev)->features & ~(NETIF_F_VLAN_FEATURES | NETIF_F_HW_MACSEC))
3424 static int macsec_dev_init(struct net_device *dev)
3426 struct macsec_dev *macsec = macsec_priv(dev);
3427 struct net_device *real_dev = macsec->real_dev;
3430 dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
3434 err = gro_cells_init(&macsec->gro_cells, dev);
3436 free_percpu(dev->tstats);
3440 if (macsec_is_offloaded(macsec)) {
3441 dev->features = REAL_DEV_FEATURES(real_dev);
3443 dev->features = real_dev->features & SW_MACSEC_FEATURES;
3444 dev->features |= NETIF_F_LLTX | NETIF_F_GSO_SOFTWARE;
3447 dev->needed_headroom = real_dev->needed_headroom +
3448 MACSEC_NEEDED_HEADROOM;
3449 dev->needed_tailroom = real_dev->needed_tailroom +
3450 MACSEC_NEEDED_TAILROOM;
3452 if (is_zero_ether_addr(dev->dev_addr))
3453 eth_hw_addr_inherit(dev, real_dev);
3454 if (is_zero_ether_addr(dev->broadcast))
3455 memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len);
3460 static void macsec_dev_uninit(struct net_device *dev)
3462 struct macsec_dev *macsec = macsec_priv(dev);
3464 gro_cells_destroy(&macsec->gro_cells);
3465 free_percpu(dev->tstats);
3468 static netdev_features_t macsec_fix_features(struct net_device *dev,
3469 netdev_features_t features)
3471 struct macsec_dev *macsec = macsec_priv(dev);
3472 struct net_device *real_dev = macsec->real_dev;
3474 if (macsec_is_offloaded(macsec))
3475 return REAL_DEV_FEATURES(real_dev);
3477 features &= (real_dev->features & SW_MACSEC_FEATURES) |
3478 NETIF_F_GSO_SOFTWARE | NETIF_F_SOFT_FEATURES;
3479 features |= NETIF_F_LLTX;
3484 static int macsec_dev_open(struct net_device *dev)
3486 struct macsec_dev *macsec = macsec_priv(dev);
3487 struct net_device *real_dev = macsec->real_dev;
3490 err = dev_uc_add(real_dev, dev->dev_addr);
3494 if (dev->flags & IFF_ALLMULTI) {
3495 err = dev_set_allmulti(real_dev, 1);
3500 if (dev->flags & IFF_PROMISC) {
3501 err = dev_set_promiscuity(real_dev, 1);
3503 goto clear_allmulti;
3506 /* If h/w offloading is available, propagate to the device */
3507 if (macsec_is_offloaded(macsec)) {
3508 const struct macsec_ops *ops;
3509 struct macsec_context ctx;
3511 ops = macsec_get_ops(netdev_priv(dev), &ctx);
3514 goto clear_allmulti;
3517 ctx.secy = &macsec->secy;
3518 err = macsec_offload(ops->mdo_dev_open, &ctx);
3520 goto clear_allmulti;
3523 if (netif_carrier_ok(real_dev))
3524 netif_carrier_on(dev);
3528 if (dev->flags & IFF_ALLMULTI)
3529 dev_set_allmulti(real_dev, -1);
3531 dev_uc_del(real_dev, dev->dev_addr);
3532 netif_carrier_off(dev);
3536 static int macsec_dev_stop(struct net_device *dev)
3538 struct macsec_dev *macsec = macsec_priv(dev);
3539 struct net_device *real_dev = macsec->real_dev;
3541 netif_carrier_off(dev);
3543 /* If h/w offloading is available, propagate to the device */
3544 if (macsec_is_offloaded(macsec)) {
3545 const struct macsec_ops *ops;
3546 struct macsec_context ctx;
3548 ops = macsec_get_ops(macsec, &ctx);
3550 ctx.secy = &macsec->secy;
3551 macsec_offload(ops->mdo_dev_stop, &ctx);
3555 dev_mc_unsync(real_dev, dev);
3556 dev_uc_unsync(real_dev, dev);
3558 if (dev->flags & IFF_ALLMULTI)
3559 dev_set_allmulti(real_dev, -1);
3561 if (dev->flags & IFF_PROMISC)
3562 dev_set_promiscuity(real_dev, -1);
3564 dev_uc_del(real_dev, dev->dev_addr);
3569 static void macsec_dev_change_rx_flags(struct net_device *dev, int change)
3571 struct net_device *real_dev = macsec_priv(dev)->real_dev;
3573 if (!(dev->flags & IFF_UP))
3576 if (change & IFF_ALLMULTI)
3577 dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1);
3579 if (change & IFF_PROMISC)
3580 dev_set_promiscuity(real_dev,
3581 dev->flags & IFF_PROMISC ? 1 : -1);
3584 static void macsec_dev_set_rx_mode(struct net_device *dev)
3586 struct net_device *real_dev = macsec_priv(dev)->real_dev;
3588 dev_mc_sync(real_dev, dev);
3589 dev_uc_sync(real_dev, dev);
3592 static int macsec_set_mac_address(struct net_device *dev, void *p)
3594 struct macsec_dev *macsec = macsec_priv(dev);
3595 struct net_device *real_dev = macsec->real_dev;
3596 struct sockaddr *addr = p;
3599 if (!is_valid_ether_addr(addr->sa_data))
3600 return -EADDRNOTAVAIL;
3602 if (!(dev->flags & IFF_UP))
3605 err = dev_uc_add(real_dev, addr->sa_data);
3609 dev_uc_del(real_dev, dev->dev_addr);
3612 ether_addr_copy(dev->dev_addr, addr->sa_data);
3613 macsec->secy.sci = dev_to_sci(dev, MACSEC_PORT_ES);
3615 /* If h/w offloading is available, propagate to the device */
3616 if (macsec_is_offloaded(macsec)) {
3617 const struct macsec_ops *ops;
3618 struct macsec_context ctx;
3620 ops = macsec_get_ops(macsec, &ctx);
3622 ctx.secy = &macsec->secy;
3623 macsec_offload(ops->mdo_upd_secy, &ctx);
3630 static int macsec_change_mtu(struct net_device *dev, int new_mtu)
3632 struct macsec_dev *macsec = macsec_priv(dev);
3633 unsigned int extra = macsec->secy.icv_len + macsec_extra_len(true);
3635 if (macsec->real_dev->mtu - extra < new_mtu)
3643 static void macsec_get_stats64(struct net_device *dev,
3644 struct rtnl_link_stats64 *s)
3651 for_each_possible_cpu(cpu) {
3652 struct pcpu_sw_netstats *stats;
3653 struct pcpu_sw_netstats tmp;
3656 stats = per_cpu_ptr(dev->tstats, cpu);
3658 start = u64_stats_fetch_begin_irq(&stats->syncp);
3659 tmp.rx_packets = stats->rx_packets;
3660 tmp.rx_bytes = stats->rx_bytes;
3661 tmp.tx_packets = stats->tx_packets;
3662 tmp.tx_bytes = stats->tx_bytes;
3663 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
3665 s->rx_packets += tmp.rx_packets;
3666 s->rx_bytes += tmp.rx_bytes;
3667 s->tx_packets += tmp.tx_packets;
3668 s->tx_bytes += tmp.tx_bytes;
3671 s->rx_dropped = dev->stats.rx_dropped;
3672 s->tx_dropped = dev->stats.tx_dropped;
3675 static int macsec_get_iflink(const struct net_device *dev)
3677 return macsec_priv(dev)->real_dev->ifindex;
3680 static const struct net_device_ops macsec_netdev_ops = {
3681 .ndo_init = macsec_dev_init,
3682 .ndo_uninit = macsec_dev_uninit,
3683 .ndo_open = macsec_dev_open,
3684 .ndo_stop = macsec_dev_stop,
3685 .ndo_fix_features = macsec_fix_features,
3686 .ndo_change_mtu = macsec_change_mtu,
3687 .ndo_set_rx_mode = macsec_dev_set_rx_mode,
3688 .ndo_change_rx_flags = macsec_dev_change_rx_flags,
3689 .ndo_set_mac_address = macsec_set_mac_address,
3690 .ndo_start_xmit = macsec_start_xmit,
3691 .ndo_get_stats64 = macsec_get_stats64,
3692 .ndo_get_iflink = macsec_get_iflink,
3695 static const struct device_type macsec_type = {
3699 static const struct nla_policy macsec_rtnl_policy[IFLA_MACSEC_MAX + 1] = {
3700 [IFLA_MACSEC_SCI] = { .type = NLA_U64 },
3701 [IFLA_MACSEC_PORT] = { .type = NLA_U16 },
3702 [IFLA_MACSEC_ICV_LEN] = { .type = NLA_U8 },
3703 [IFLA_MACSEC_CIPHER_SUITE] = { .type = NLA_U64 },
3704 [IFLA_MACSEC_WINDOW] = { .type = NLA_U32 },
3705 [IFLA_MACSEC_ENCODING_SA] = { .type = NLA_U8 },
3706 [IFLA_MACSEC_ENCRYPT] = { .type = NLA_U8 },
3707 [IFLA_MACSEC_PROTECT] = { .type = NLA_U8 },
3708 [IFLA_MACSEC_INC_SCI] = { .type = NLA_U8 },
3709 [IFLA_MACSEC_ES] = { .type = NLA_U8 },
3710 [IFLA_MACSEC_SCB] = { .type = NLA_U8 },
3711 [IFLA_MACSEC_REPLAY_PROTECT] = { .type = NLA_U8 },
3712 [IFLA_MACSEC_VALIDATION] = { .type = NLA_U8 },
3715 static void macsec_free_netdev(struct net_device *dev)
3717 struct macsec_dev *macsec = macsec_priv(dev);
3719 free_percpu(macsec->stats);
3720 free_percpu(macsec->secy.tx_sc.stats);
3724 static void macsec_setup(struct net_device *dev)
3728 dev->max_mtu = ETH_MAX_MTU;
3729 dev->priv_flags |= IFF_NO_QUEUE;
3730 dev->netdev_ops = &macsec_netdev_ops;
3731 dev->needs_free_netdev = true;
3732 dev->priv_destructor = macsec_free_netdev;
3733 SET_NETDEV_DEVTYPE(dev, &macsec_type);
3735 eth_zero_addr(dev->broadcast);
3738 static int macsec_changelink_common(struct net_device *dev,
3739 struct nlattr *data[])
3741 struct macsec_secy *secy;
3742 struct macsec_tx_sc *tx_sc;
3744 secy = &macsec_priv(dev)->secy;
3745 tx_sc = &secy->tx_sc;
3747 if (data[IFLA_MACSEC_ENCODING_SA]) {
3748 struct macsec_tx_sa *tx_sa;
3750 tx_sc->encoding_sa = nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]);
3751 tx_sa = rtnl_dereference(tx_sc->sa[tx_sc->encoding_sa]);
3753 secy->operational = tx_sa && tx_sa->active;
3756 if (data[IFLA_MACSEC_WINDOW])
3757 secy->replay_window = nla_get_u32(data[IFLA_MACSEC_WINDOW]);
3759 if (data[IFLA_MACSEC_ENCRYPT])
3760 tx_sc->encrypt = !!nla_get_u8(data[IFLA_MACSEC_ENCRYPT]);
3762 if (data[IFLA_MACSEC_PROTECT])
3763 secy->protect_frames = !!nla_get_u8(data[IFLA_MACSEC_PROTECT]);
3765 if (data[IFLA_MACSEC_INC_SCI])
3766 tx_sc->send_sci = !!nla_get_u8(data[IFLA_MACSEC_INC_SCI]);
3768 if (data[IFLA_MACSEC_ES])
3769 tx_sc->end_station = !!nla_get_u8(data[IFLA_MACSEC_ES]);
3771 if (data[IFLA_MACSEC_SCB])
3772 tx_sc->scb = !!nla_get_u8(data[IFLA_MACSEC_SCB]);
3774 if (data[IFLA_MACSEC_REPLAY_PROTECT])
3775 secy->replay_protect = !!nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT]);
3777 if (data[IFLA_MACSEC_VALIDATION])
3778 secy->validate_frames = nla_get_u8(data[IFLA_MACSEC_VALIDATION]);
3780 if (data[IFLA_MACSEC_CIPHER_SUITE]) {
3781 switch (nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE])) {
3782 case MACSEC_CIPHER_ID_GCM_AES_128:
3783 case MACSEC_DEFAULT_CIPHER_ID:
3784 secy->key_len = MACSEC_GCM_AES_128_SAK_LEN;
3787 case MACSEC_CIPHER_ID_GCM_AES_256:
3788 secy->key_len = MACSEC_GCM_AES_256_SAK_LEN;
3791 case MACSEC_CIPHER_ID_GCM_AES_XPN_128:
3792 secy->key_len = MACSEC_GCM_AES_128_SAK_LEN;
3795 case MACSEC_CIPHER_ID_GCM_AES_XPN_256:
3796 secy->key_len = MACSEC_GCM_AES_256_SAK_LEN;
3807 static int macsec_changelink(struct net_device *dev, struct nlattr *tb[],
3808 struct nlattr *data[],
3809 struct netlink_ext_ack *extack)
3811 struct macsec_dev *macsec = macsec_priv(dev);
3812 struct macsec_tx_sa tx_sc;
3813 struct macsec_secy secy;
3819 if (data[IFLA_MACSEC_CIPHER_SUITE] ||
3820 data[IFLA_MACSEC_ICV_LEN] ||
3821 data[IFLA_MACSEC_SCI] ||
3822 data[IFLA_MACSEC_PORT])
3825 /* Keep a copy of unmodified secy and tx_sc, in case the offload
3826 * propagation fails, to revert macsec_changelink_common.
3828 memcpy(&secy, &macsec->secy, sizeof(secy));
3829 memcpy(&tx_sc, &macsec->secy.tx_sc, sizeof(tx_sc));
3831 ret = macsec_changelink_common(dev, data);
3835 /* If h/w offloading is available, propagate to the device */
3836 if (macsec_is_offloaded(macsec)) {
3837 const struct macsec_ops *ops;
3838 struct macsec_context ctx;
3841 ops = macsec_get_ops(netdev_priv(dev), &ctx);
3847 ctx.secy = &macsec->secy;
3848 ret = macsec_offload(ops->mdo_upd_secy, &ctx);
3856 memcpy(&macsec->secy.tx_sc, &tx_sc, sizeof(tx_sc));
3857 memcpy(&macsec->secy, &secy, sizeof(secy));
3862 static void macsec_del_dev(struct macsec_dev *macsec)
3866 while (macsec->secy.rx_sc) {
3867 struct macsec_rx_sc *rx_sc = rtnl_dereference(macsec->secy.rx_sc);
3869 rcu_assign_pointer(macsec->secy.rx_sc, rx_sc->next);
3873 for (i = 0; i < MACSEC_NUM_AN; i++) {
3874 struct macsec_tx_sa *sa = rtnl_dereference(macsec->secy.tx_sc.sa[i]);
3877 RCU_INIT_POINTER(macsec->secy.tx_sc.sa[i], NULL);
3883 static void macsec_common_dellink(struct net_device *dev, struct list_head *head)
3885 struct macsec_dev *macsec = macsec_priv(dev);
3886 struct net_device *real_dev = macsec->real_dev;
3888 unregister_netdevice_queue(dev, head);
3889 list_del_rcu(&macsec->secys);
3890 macsec_del_dev(macsec);
3891 netdev_upper_dev_unlink(real_dev, dev);
3893 macsec_generation++;
3896 static void macsec_dellink(struct net_device *dev, struct list_head *head)
3898 struct macsec_dev *macsec = macsec_priv(dev);
3899 struct net_device *real_dev = macsec->real_dev;
3900 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
3902 /* If h/w offloading is available, propagate to the device */
3903 if (macsec_is_offloaded(macsec)) {
3904 const struct macsec_ops *ops;
3905 struct macsec_context ctx;
3907 ops = macsec_get_ops(netdev_priv(dev), &ctx);
3909 ctx.secy = &macsec->secy;
3910 macsec_offload(ops->mdo_del_secy, &ctx);
3914 macsec_common_dellink(dev, head);
3916 if (list_empty(&rxd->secys)) {
3917 netdev_rx_handler_unregister(real_dev);
3922 static int register_macsec_dev(struct net_device *real_dev,
3923 struct net_device *dev)
3925 struct macsec_dev *macsec = macsec_priv(dev);
3926 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
3931 rxd = kmalloc(sizeof(*rxd), GFP_KERNEL);
3935 INIT_LIST_HEAD(&rxd->secys);
3937 err = netdev_rx_handler_register(real_dev, macsec_handle_frame,
3945 list_add_tail_rcu(&macsec->secys, &rxd->secys);
3949 static bool sci_exists(struct net_device *dev, sci_t sci)
3951 struct macsec_rxh_data *rxd = macsec_data_rtnl(dev);
3952 struct macsec_dev *macsec;
3954 list_for_each_entry(macsec, &rxd->secys, secys) {
3955 if (macsec->secy.sci == sci)
3962 static int macsec_add_dev(struct net_device *dev, sci_t sci, u8 icv_len)
3964 struct macsec_dev *macsec = macsec_priv(dev);
3965 struct macsec_secy *secy = &macsec->secy;
3967 macsec->stats = netdev_alloc_pcpu_stats(struct pcpu_secy_stats);
3971 secy->tx_sc.stats = netdev_alloc_pcpu_stats(struct pcpu_tx_sc_stats);
3972 if (!secy->tx_sc.stats) {
3973 free_percpu(macsec->stats);
3977 if (sci == MACSEC_UNDEF_SCI)
3978 sci = dev_to_sci(dev, MACSEC_PORT_ES);
3981 secy->operational = true;
3982 secy->key_len = DEFAULT_SAK_LEN;
3983 secy->icv_len = icv_len;
3984 secy->validate_frames = MACSEC_VALIDATE_DEFAULT;
3985 secy->protect_frames = true;
3986 secy->replay_protect = false;
3987 secy->xpn = DEFAULT_XPN;
3990 secy->tx_sc.active = true;
3991 secy->tx_sc.encoding_sa = DEFAULT_ENCODING_SA;
3992 secy->tx_sc.encrypt = DEFAULT_ENCRYPT;
3993 secy->tx_sc.send_sci = DEFAULT_SEND_SCI;
3994 secy->tx_sc.end_station = false;
3995 secy->tx_sc.scb = false;
4000 static int macsec_newlink(struct net *net, struct net_device *dev,
4001 struct nlattr *tb[], struct nlattr *data[],
4002 struct netlink_ext_ack *extack)
4004 struct macsec_dev *macsec = macsec_priv(dev);
4005 struct net_device *real_dev;
4008 u8 icv_len = DEFAULT_ICV_LEN;
4009 rx_handler_func_t *rx_handler;
4013 real_dev = __dev_get_by_index(net, nla_get_u32(tb[IFLA_LINK]));
4016 if (real_dev->type != ARPHRD_ETHER)
4019 dev->priv_flags |= IFF_MACSEC;
4021 macsec->real_dev = real_dev;
4023 if (data && data[IFLA_MACSEC_OFFLOAD])
4024 macsec->offload = nla_get_offload(data[IFLA_MACSEC_OFFLOAD]);
4026 /* MACsec offloading is off by default */
4027 macsec->offload = MACSEC_OFFLOAD_OFF;
4029 /* Check if the offloading mode is supported by the underlying layers */
4030 if (macsec->offload != MACSEC_OFFLOAD_OFF &&
4031 !macsec_check_offload(macsec->offload, macsec))
4034 if (data && data[IFLA_MACSEC_ICV_LEN])
4035 icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]);
4036 dev->mtu = real_dev->mtu - icv_len - macsec_extra_len(true);
4038 rx_handler = rtnl_dereference(real_dev->rx_handler);
4039 if (rx_handler && rx_handler != macsec_handle_frame)
4042 err = register_netdevice(dev);
4046 err = netdev_upper_dev_link(real_dev, dev, extack);
4050 /* need to be already registered so that ->init has run and
4051 * the MAC addr is set
4053 if (data && data[IFLA_MACSEC_SCI])
4054 sci = nla_get_sci(data[IFLA_MACSEC_SCI]);
4055 else if (data && data[IFLA_MACSEC_PORT])
4056 sci = dev_to_sci(dev, nla_get_be16(data[IFLA_MACSEC_PORT]));
4058 sci = dev_to_sci(dev, MACSEC_PORT_ES);
4060 if (rx_handler && sci_exists(real_dev, sci)) {
4065 err = macsec_add_dev(dev, sci, icv_len);
4070 err = macsec_changelink_common(dev, data);
4075 /* If h/w offloading is available, propagate to the device */
4076 if (macsec_is_offloaded(macsec)) {
4077 const struct macsec_ops *ops;
4078 struct macsec_context ctx;
4080 ops = macsec_get_ops(macsec, &ctx);
4082 ctx.secy = &macsec->secy;
4083 err = macsec_offload(ops->mdo_add_secy, &ctx);
4089 err = register_macsec_dev(real_dev, dev);
4093 netif_stacked_transfer_operstate(real_dev, dev);
4094 linkwatch_fire_event(dev);
4096 macsec_generation++;
4101 macsec_del_dev(macsec);
4103 netdev_upper_dev_unlink(real_dev, dev);
4105 unregister_netdevice(dev);
4109 static int macsec_validate_attr(struct nlattr *tb[], struct nlattr *data[],
4110 struct netlink_ext_ack *extack)
4112 u64 csid = MACSEC_DEFAULT_CIPHER_ID;
4113 u8 icv_len = DEFAULT_ICV_LEN;
4120 if (data[IFLA_MACSEC_CIPHER_SUITE])
4121 csid = nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE]);
4123 if (data[IFLA_MACSEC_ICV_LEN]) {
4124 icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]);
4125 if (icv_len != DEFAULT_ICV_LEN) {
4126 char dummy_key[DEFAULT_SAK_LEN] = { 0 };
4127 struct crypto_aead *dummy_tfm;
4129 dummy_tfm = macsec_alloc_tfm(dummy_key,
4132 if (IS_ERR(dummy_tfm))
4133 return PTR_ERR(dummy_tfm);
4134 crypto_free_aead(dummy_tfm);
4139 case MACSEC_CIPHER_ID_GCM_AES_128:
4140 case MACSEC_CIPHER_ID_GCM_AES_256:
4141 case MACSEC_CIPHER_ID_GCM_AES_XPN_128:
4142 case MACSEC_CIPHER_ID_GCM_AES_XPN_256:
4143 case MACSEC_DEFAULT_CIPHER_ID:
4144 if (icv_len < MACSEC_MIN_ICV_LEN ||
4145 icv_len > MACSEC_STD_ICV_LEN)
4152 if (data[IFLA_MACSEC_ENCODING_SA]) {
4153 if (nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]) >= MACSEC_NUM_AN)
4157 for (flag = IFLA_MACSEC_ENCODING_SA + 1;
4158 flag < IFLA_MACSEC_VALIDATION;
4161 if (nla_get_u8(data[flag]) > 1)
4166 es = data[IFLA_MACSEC_ES] ? nla_get_u8(data[IFLA_MACSEC_ES]) : false;
4167 sci = data[IFLA_MACSEC_INC_SCI] ? nla_get_u8(data[IFLA_MACSEC_INC_SCI]) : false;
4168 scb = data[IFLA_MACSEC_SCB] ? nla_get_u8(data[IFLA_MACSEC_SCB]) : false;
4170 if ((sci && (scb || es)) || (scb && es))
4173 if (data[IFLA_MACSEC_VALIDATION] &&
4174 nla_get_u8(data[IFLA_MACSEC_VALIDATION]) > MACSEC_VALIDATE_MAX)
4177 if ((data[IFLA_MACSEC_REPLAY_PROTECT] &&
4178 nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT])) &&
4179 !data[IFLA_MACSEC_WINDOW])
4185 static struct net *macsec_get_link_net(const struct net_device *dev)
4187 return dev_net(macsec_priv(dev)->real_dev);
4190 static size_t macsec_get_size(const struct net_device *dev)
4192 return nla_total_size_64bit(8) + /* IFLA_MACSEC_SCI */
4193 nla_total_size(1) + /* IFLA_MACSEC_ICV_LEN */
4194 nla_total_size_64bit(8) + /* IFLA_MACSEC_CIPHER_SUITE */
4195 nla_total_size(4) + /* IFLA_MACSEC_WINDOW */
4196 nla_total_size(1) + /* IFLA_MACSEC_ENCODING_SA */
4197 nla_total_size(1) + /* IFLA_MACSEC_ENCRYPT */
4198 nla_total_size(1) + /* IFLA_MACSEC_PROTECT */
4199 nla_total_size(1) + /* IFLA_MACSEC_INC_SCI */
4200 nla_total_size(1) + /* IFLA_MACSEC_ES */
4201 nla_total_size(1) + /* IFLA_MACSEC_SCB */
4202 nla_total_size(1) + /* IFLA_MACSEC_REPLAY_PROTECT */
4203 nla_total_size(1) + /* IFLA_MACSEC_VALIDATION */
4207 static int macsec_fill_info(struct sk_buff *skb,
4208 const struct net_device *dev)
4210 struct macsec_secy *secy = &macsec_priv(dev)->secy;
4211 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
4214 switch (secy->key_len) {
4215 case MACSEC_GCM_AES_128_SAK_LEN:
4216 csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_128 : MACSEC_DEFAULT_CIPHER_ID;
4218 case MACSEC_GCM_AES_256_SAK_LEN:
4219 csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_256 : MACSEC_CIPHER_ID_GCM_AES_256;
4222 goto nla_put_failure;
4225 if (nla_put_sci(skb, IFLA_MACSEC_SCI, secy->sci,
4227 nla_put_u8(skb, IFLA_MACSEC_ICV_LEN, secy->icv_len) ||
4228 nla_put_u64_64bit(skb, IFLA_MACSEC_CIPHER_SUITE,
4229 csid, IFLA_MACSEC_PAD) ||
4230 nla_put_u8(skb, IFLA_MACSEC_ENCODING_SA, tx_sc->encoding_sa) ||
4231 nla_put_u8(skb, IFLA_MACSEC_ENCRYPT, tx_sc->encrypt) ||
4232 nla_put_u8(skb, IFLA_MACSEC_PROTECT, secy->protect_frames) ||
4233 nla_put_u8(skb, IFLA_MACSEC_INC_SCI, tx_sc->send_sci) ||
4234 nla_put_u8(skb, IFLA_MACSEC_ES, tx_sc->end_station) ||
4235 nla_put_u8(skb, IFLA_MACSEC_SCB, tx_sc->scb) ||
4236 nla_put_u8(skb, IFLA_MACSEC_REPLAY_PROTECT, secy->replay_protect) ||
4237 nla_put_u8(skb, IFLA_MACSEC_VALIDATION, secy->validate_frames) ||
4239 goto nla_put_failure;
4241 if (secy->replay_protect) {
4242 if (nla_put_u32(skb, IFLA_MACSEC_WINDOW, secy->replay_window))
4243 goto nla_put_failure;
4252 static struct rtnl_link_ops macsec_link_ops __read_mostly = {
4254 .priv_size = sizeof(struct macsec_dev),
4255 .maxtype = IFLA_MACSEC_MAX,
4256 .policy = macsec_rtnl_policy,
4257 .setup = macsec_setup,
4258 .validate = macsec_validate_attr,
4259 .newlink = macsec_newlink,
4260 .changelink = macsec_changelink,
4261 .dellink = macsec_dellink,
4262 .get_size = macsec_get_size,
4263 .fill_info = macsec_fill_info,
4264 .get_link_net = macsec_get_link_net,
4267 static bool is_macsec_master(struct net_device *dev)
4269 return rcu_access_pointer(dev->rx_handler) == macsec_handle_frame;
4272 static int macsec_notify(struct notifier_block *this, unsigned long event,
4275 struct net_device *real_dev = netdev_notifier_info_to_dev(ptr);
4278 if (!is_macsec_master(real_dev))
4284 case NETDEV_CHANGE: {
4285 struct macsec_dev *m, *n;
4286 struct macsec_rxh_data *rxd;
4288 rxd = macsec_data_rtnl(real_dev);
4289 list_for_each_entry_safe(m, n, &rxd->secys, secys) {
4290 struct net_device *dev = m->secy.netdev;
4292 netif_stacked_transfer_operstate(real_dev, dev);
4296 case NETDEV_UNREGISTER: {
4297 struct macsec_dev *m, *n;
4298 struct macsec_rxh_data *rxd;
4300 rxd = macsec_data_rtnl(real_dev);
4301 list_for_each_entry_safe(m, n, &rxd->secys, secys) {
4302 macsec_common_dellink(m->secy.netdev, &head);
4305 netdev_rx_handler_unregister(real_dev);
4308 unregister_netdevice_many(&head);
4311 case NETDEV_CHANGEMTU: {
4312 struct macsec_dev *m;
4313 struct macsec_rxh_data *rxd;
4315 rxd = macsec_data_rtnl(real_dev);
4316 list_for_each_entry(m, &rxd->secys, secys) {
4317 struct net_device *dev = m->secy.netdev;
4318 unsigned int mtu = real_dev->mtu - (m->secy.icv_len +
4319 macsec_extra_len(true));
4322 dev_set_mtu(dev, mtu);
4330 static struct notifier_block macsec_notifier = {
4331 .notifier_call = macsec_notify,
4334 static int __init macsec_init(void)
4338 pr_info("MACsec IEEE 802.1AE\n");
4339 err = register_netdevice_notifier(&macsec_notifier);
4343 err = rtnl_link_register(&macsec_link_ops);
4347 err = genl_register_family(&macsec_fam);
4354 rtnl_link_unregister(&macsec_link_ops);
4356 unregister_netdevice_notifier(&macsec_notifier);
4360 static void __exit macsec_exit(void)
4362 genl_unregister_family(&macsec_fam);
4363 rtnl_link_unregister(&macsec_link_ops);
4364 unregister_netdevice_notifier(&macsec_notifier);
4368 module_init(macsec_init);
4369 module_exit(macsec_exit);
4371 MODULE_ALIAS_RTNL_LINK("macsec");
4372 MODULE_ALIAS_GENL_FAMILY("macsec");
4374 MODULE_DESCRIPTION("MACsec IEEE 802.1AE");
4375 MODULE_LICENSE("GPL v2");