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 * @dev_tracker: refcount tracker for @real_dev reference
103 * @stats: MACsec device stats
104 * @secys: linked list of SecY's on the underlying device
105 * @gro_cells: pointer to the Generic Receive Offload cell
106 * @offload: status of offloading on the MACsec device
109 struct macsec_secy secy;
110 struct net_device *real_dev;
111 netdevice_tracker dev_tracker;
112 struct pcpu_secy_stats __percpu *stats;
113 struct list_head secys;
114 struct gro_cells gro_cells;
115 enum macsec_offload offload;
119 * struct macsec_rxh_data - rx_handler private argument
120 * @secys: linked list of SecY's on this underlying device
122 struct macsec_rxh_data {
123 struct list_head secys;
126 static struct macsec_dev *macsec_priv(const struct net_device *dev)
128 return (struct macsec_dev *)netdev_priv(dev);
131 static struct macsec_rxh_data *macsec_data_rcu(const struct net_device *dev)
133 return rcu_dereference_bh(dev->rx_handler_data);
136 static struct macsec_rxh_data *macsec_data_rtnl(const struct net_device *dev)
138 return rtnl_dereference(dev->rx_handler_data);
142 struct aead_request *req;
144 struct macsec_tx_sa *tx_sa;
145 struct macsec_rx_sa *rx_sa;
152 static struct macsec_rx_sa *macsec_rxsa_get(struct macsec_rx_sa __rcu *ptr)
154 struct macsec_rx_sa *sa = rcu_dereference_bh(ptr);
156 if (!sa || !sa->active)
159 if (!refcount_inc_not_zero(&sa->refcnt))
165 static void free_rx_sc_rcu(struct rcu_head *head)
167 struct macsec_rx_sc *rx_sc = container_of(head, struct macsec_rx_sc, rcu_head);
169 free_percpu(rx_sc->stats);
173 static struct macsec_rx_sc *macsec_rxsc_get(struct macsec_rx_sc *sc)
175 return refcount_inc_not_zero(&sc->refcnt) ? sc : NULL;
178 static void macsec_rxsc_put(struct macsec_rx_sc *sc)
180 if (refcount_dec_and_test(&sc->refcnt))
181 call_rcu(&sc->rcu_head, free_rx_sc_rcu);
184 static void free_rxsa(struct rcu_head *head)
186 struct macsec_rx_sa *sa = container_of(head, struct macsec_rx_sa, rcu);
188 crypto_free_aead(sa->key.tfm);
189 free_percpu(sa->stats);
193 static void macsec_rxsa_put(struct macsec_rx_sa *sa)
195 if (refcount_dec_and_test(&sa->refcnt))
196 call_rcu(&sa->rcu, free_rxsa);
199 static struct macsec_tx_sa *macsec_txsa_get(struct macsec_tx_sa __rcu *ptr)
201 struct macsec_tx_sa *sa = rcu_dereference_bh(ptr);
203 if (!sa || !sa->active)
206 if (!refcount_inc_not_zero(&sa->refcnt))
212 static void free_txsa(struct rcu_head *head)
214 struct macsec_tx_sa *sa = container_of(head, struct macsec_tx_sa, rcu);
216 crypto_free_aead(sa->key.tfm);
217 free_percpu(sa->stats);
221 static void macsec_txsa_put(struct macsec_tx_sa *sa)
223 if (refcount_dec_and_test(&sa->refcnt))
224 call_rcu(&sa->rcu, free_txsa);
227 static struct macsec_cb *macsec_skb_cb(struct sk_buff *skb)
229 BUILD_BUG_ON(sizeof(struct macsec_cb) > sizeof(skb->cb));
230 return (struct macsec_cb *)skb->cb;
233 #define MACSEC_PORT_ES (htons(0x0001))
234 #define MACSEC_PORT_SCB (0x0000)
235 #define MACSEC_UNDEF_SCI ((__force sci_t)0xffffffffffffffffULL)
236 #define MACSEC_UNDEF_SSCI ((__force ssci_t)0xffffffff)
238 #define MACSEC_GCM_AES_128_SAK_LEN 16
239 #define MACSEC_GCM_AES_256_SAK_LEN 32
241 #define DEFAULT_SAK_LEN MACSEC_GCM_AES_128_SAK_LEN
242 #define DEFAULT_XPN false
243 #define DEFAULT_SEND_SCI true
244 #define DEFAULT_ENCRYPT false
245 #define DEFAULT_ENCODING_SA 0
247 static bool send_sci(const struct macsec_secy *secy)
249 const struct macsec_tx_sc *tx_sc = &secy->tx_sc;
251 return tx_sc->send_sci ||
252 (secy->n_rx_sc > 1 && !tx_sc->end_station && !tx_sc->scb);
255 static sci_t make_sci(const u8 *addr, __be16 port)
259 memcpy(&sci, addr, ETH_ALEN);
260 memcpy(((char *)&sci) + ETH_ALEN, &port, sizeof(port));
265 static sci_t macsec_frame_sci(struct macsec_eth_header *hdr, bool sci_present)
270 memcpy(&sci, hdr->secure_channel_id,
271 sizeof(hdr->secure_channel_id));
273 sci = make_sci(hdr->eth.h_source, MACSEC_PORT_ES);
278 static unsigned int macsec_sectag_len(bool sci_present)
280 return MACSEC_TAG_LEN + (sci_present ? MACSEC_SCI_LEN : 0);
283 static unsigned int macsec_hdr_len(bool sci_present)
285 return macsec_sectag_len(sci_present) + ETH_HLEN;
288 static unsigned int macsec_extra_len(bool sci_present)
290 return macsec_sectag_len(sci_present) + sizeof(__be16);
293 /* Fill SecTAG according to IEEE 802.1AE-2006 10.5.3 */
294 static void macsec_fill_sectag(struct macsec_eth_header *h,
295 const struct macsec_secy *secy, u32 pn,
298 const struct macsec_tx_sc *tx_sc = &secy->tx_sc;
300 memset(&h->tci_an, 0, macsec_sectag_len(sci_present));
301 h->eth.h_proto = htons(ETH_P_MACSEC);
304 h->tci_an |= MACSEC_TCI_SC;
305 memcpy(&h->secure_channel_id, &secy->sci,
306 sizeof(h->secure_channel_id));
308 if (tx_sc->end_station)
309 h->tci_an |= MACSEC_TCI_ES;
311 h->tci_an |= MACSEC_TCI_SCB;
314 h->packet_number = htonl(pn);
316 /* with GCM, C/E clear for !encrypt, both set for encrypt */
318 h->tci_an |= MACSEC_TCI_CONFID;
319 else if (secy->icv_len != DEFAULT_ICV_LEN)
320 h->tci_an |= MACSEC_TCI_C;
322 h->tci_an |= tx_sc->encoding_sa;
325 static void macsec_set_shortlen(struct macsec_eth_header *h, size_t data_len)
327 if (data_len < MIN_NON_SHORT_LEN)
328 h->short_length = data_len;
331 /* Checks if a MACsec interface is being offloaded to an hardware engine */
332 static bool macsec_is_offloaded(struct macsec_dev *macsec)
334 if (macsec->offload == MACSEC_OFFLOAD_MAC ||
335 macsec->offload == MACSEC_OFFLOAD_PHY)
341 /* Checks if underlying layers implement MACsec offloading functions. */
342 static bool macsec_check_offload(enum macsec_offload offload,
343 struct macsec_dev *macsec)
345 if (!macsec || !macsec->real_dev)
348 if (offload == MACSEC_OFFLOAD_PHY)
349 return macsec->real_dev->phydev &&
350 macsec->real_dev->phydev->macsec_ops;
351 else if (offload == MACSEC_OFFLOAD_MAC)
352 return macsec->real_dev->features & NETIF_F_HW_MACSEC &&
353 macsec->real_dev->macsec_ops;
358 static const struct macsec_ops *__macsec_get_ops(enum macsec_offload offload,
359 struct macsec_dev *macsec,
360 struct macsec_context *ctx)
363 memset(ctx, 0, sizeof(*ctx));
364 ctx->offload = offload;
366 if (offload == MACSEC_OFFLOAD_PHY)
367 ctx->phydev = macsec->real_dev->phydev;
368 else if (offload == MACSEC_OFFLOAD_MAC)
369 ctx->netdev = macsec->real_dev;
372 if (offload == MACSEC_OFFLOAD_PHY)
373 return macsec->real_dev->phydev->macsec_ops;
375 return macsec->real_dev->macsec_ops;
378 /* Returns a pointer to the MACsec ops struct if any and updates the MACsec
379 * context device reference if provided.
381 static const struct macsec_ops *macsec_get_ops(struct macsec_dev *macsec,
382 struct macsec_context *ctx)
384 if (!macsec_check_offload(macsec->offload, macsec))
387 return __macsec_get_ops(macsec->offload, macsec, ctx);
390 /* validate MACsec packet according to IEEE 802.1AE-2018 9.12 */
391 static bool macsec_validate_skb(struct sk_buff *skb, u16 icv_len, bool xpn)
393 struct macsec_eth_header *h = (struct macsec_eth_header *)skb->data;
394 int len = skb->len - 2 * ETH_ALEN;
395 int extra_len = macsec_extra_len(!!(h->tci_an & MACSEC_TCI_SC)) + icv_len;
397 /* a) It comprises at least 17 octets */
401 /* b) MACsec EtherType: already checked */
403 /* c) V bit is clear */
404 if (h->tci_an & MACSEC_TCI_VERSION)
407 /* d) ES or SCB => !SC */
408 if ((h->tci_an & MACSEC_TCI_ES || h->tci_an & MACSEC_TCI_SCB) &&
409 (h->tci_an & MACSEC_TCI_SC))
412 /* e) Bits 7 and 8 of octet 4 of the SecTAG are clear */
416 /* rx.pn != 0 if not XPN (figure 10-5 with 802.11AEbw-2013 amendment) */
417 if (!h->packet_number && !xpn)
420 /* length check, f) g) h) i) */
422 return len == extra_len + h->short_length;
423 return len >= extra_len + MIN_NON_SHORT_LEN;
426 #define MACSEC_NEEDED_HEADROOM (macsec_extra_len(true))
427 #define MACSEC_NEEDED_TAILROOM MACSEC_STD_ICV_LEN
429 static void macsec_fill_iv_xpn(unsigned char *iv, ssci_t ssci, u64 pn,
432 struct gcm_iv_xpn *gcm_iv = (struct gcm_iv_xpn *)iv;
434 gcm_iv->ssci = ssci ^ salt.ssci;
435 gcm_iv->pn = cpu_to_be64(pn) ^ salt.pn;
438 static void macsec_fill_iv(unsigned char *iv, sci_t sci, u32 pn)
440 struct gcm_iv *gcm_iv = (struct gcm_iv *)iv;
443 gcm_iv->pn = htonl(pn);
446 static struct macsec_eth_header *macsec_ethhdr(struct sk_buff *skb)
448 return (struct macsec_eth_header *)skb_mac_header(skb);
451 static sci_t dev_to_sci(struct net_device *dev, __be16 port)
453 return make_sci(dev->dev_addr, port);
456 static void __macsec_pn_wrapped(struct macsec_secy *secy,
457 struct macsec_tx_sa *tx_sa)
459 pr_debug("PN wrapped, transitioning to !oper\n");
460 tx_sa->active = false;
461 if (secy->protect_frames)
462 secy->operational = false;
465 void macsec_pn_wrapped(struct macsec_secy *secy, struct macsec_tx_sa *tx_sa)
467 spin_lock_bh(&tx_sa->lock);
468 __macsec_pn_wrapped(secy, tx_sa);
469 spin_unlock_bh(&tx_sa->lock);
471 EXPORT_SYMBOL_GPL(macsec_pn_wrapped);
473 static pn_t tx_sa_update_pn(struct macsec_tx_sa *tx_sa,
474 struct macsec_secy *secy)
478 spin_lock_bh(&tx_sa->lock);
480 pn = tx_sa->next_pn_halves;
484 tx_sa->next_pn_halves.lower++;
486 if (tx_sa->next_pn == 0)
487 __macsec_pn_wrapped(secy, tx_sa);
488 spin_unlock_bh(&tx_sa->lock);
493 static void macsec_encrypt_finish(struct sk_buff *skb, struct net_device *dev)
495 struct macsec_dev *macsec = netdev_priv(dev);
497 skb->dev = macsec->real_dev;
498 skb_reset_mac_header(skb);
499 skb->protocol = eth_hdr(skb)->h_proto;
502 static void macsec_count_tx(struct sk_buff *skb, struct macsec_tx_sc *tx_sc,
503 struct macsec_tx_sa *tx_sa)
505 struct pcpu_tx_sc_stats *txsc_stats = this_cpu_ptr(tx_sc->stats);
507 u64_stats_update_begin(&txsc_stats->syncp);
508 if (tx_sc->encrypt) {
509 txsc_stats->stats.OutOctetsEncrypted += skb->len;
510 txsc_stats->stats.OutPktsEncrypted++;
511 this_cpu_inc(tx_sa->stats->OutPktsEncrypted);
513 txsc_stats->stats.OutOctetsProtected += skb->len;
514 txsc_stats->stats.OutPktsProtected++;
515 this_cpu_inc(tx_sa->stats->OutPktsProtected);
517 u64_stats_update_end(&txsc_stats->syncp);
520 static void count_tx(struct net_device *dev, int ret, int len)
522 if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
523 struct pcpu_sw_netstats *stats = this_cpu_ptr(dev->tstats);
525 u64_stats_update_begin(&stats->syncp);
527 stats->tx_bytes += len;
528 u64_stats_update_end(&stats->syncp);
532 static void macsec_encrypt_done(struct crypto_async_request *base, int err)
534 struct sk_buff *skb = base->data;
535 struct net_device *dev = skb->dev;
536 struct macsec_dev *macsec = macsec_priv(dev);
537 struct macsec_tx_sa *sa = macsec_skb_cb(skb)->tx_sa;
540 aead_request_free(macsec_skb_cb(skb)->req);
543 macsec_encrypt_finish(skb, dev);
544 macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa);
546 ret = dev_queue_xmit(skb);
547 count_tx(dev, ret, len);
548 rcu_read_unlock_bh();
554 static struct aead_request *macsec_alloc_req(struct crypto_aead *tfm,
556 struct scatterlist **sg,
559 size_t size, iv_offset, sg_offset;
560 struct aead_request *req;
563 size = sizeof(struct aead_request) + crypto_aead_reqsize(tfm);
565 size += GCM_AES_IV_LEN;
567 size = ALIGN(size, __alignof__(struct scatterlist));
569 size += sizeof(struct scatterlist) * num_frags;
571 tmp = kmalloc(size, GFP_ATOMIC);
575 *iv = (unsigned char *)(tmp + iv_offset);
576 *sg = (struct scatterlist *)(tmp + sg_offset);
579 aead_request_set_tfm(req, tfm);
584 static struct sk_buff *macsec_encrypt(struct sk_buff *skb,
585 struct net_device *dev)
588 struct scatterlist *sg;
589 struct sk_buff *trailer;
592 struct macsec_eth_header *hh;
593 size_t unprotected_len;
594 struct aead_request *req;
595 struct macsec_secy *secy;
596 struct macsec_tx_sc *tx_sc;
597 struct macsec_tx_sa *tx_sa;
598 struct macsec_dev *macsec = macsec_priv(dev);
602 secy = &macsec->secy;
603 tx_sc = &secy->tx_sc;
605 /* 10.5.1 TX SA assignment */
606 tx_sa = macsec_txsa_get(tx_sc->sa[tx_sc->encoding_sa]);
608 secy->operational = false;
610 return ERR_PTR(-EINVAL);
613 if (unlikely(skb_headroom(skb) < MACSEC_NEEDED_HEADROOM ||
614 skb_tailroom(skb) < MACSEC_NEEDED_TAILROOM)) {
615 struct sk_buff *nskb = skb_copy_expand(skb,
616 MACSEC_NEEDED_HEADROOM,
617 MACSEC_NEEDED_TAILROOM,
623 macsec_txsa_put(tx_sa);
625 return ERR_PTR(-ENOMEM);
628 skb = skb_unshare(skb, GFP_ATOMIC);
630 macsec_txsa_put(tx_sa);
631 return ERR_PTR(-ENOMEM);
635 unprotected_len = skb->len;
637 sci_present = send_sci(secy);
638 hh = skb_push(skb, macsec_extra_len(sci_present));
639 memmove(hh, eth, 2 * ETH_ALEN);
641 pn = tx_sa_update_pn(tx_sa, secy);
642 if (pn.full64 == 0) {
643 macsec_txsa_put(tx_sa);
645 return ERR_PTR(-ENOLINK);
647 macsec_fill_sectag(hh, secy, pn.lower, sci_present);
648 macsec_set_shortlen(hh, unprotected_len - 2 * ETH_ALEN);
650 skb_put(skb, secy->icv_len);
652 if (skb->len - ETH_HLEN > macsec_priv(dev)->real_dev->mtu) {
653 struct pcpu_secy_stats *secy_stats = this_cpu_ptr(macsec->stats);
655 u64_stats_update_begin(&secy_stats->syncp);
656 secy_stats->stats.OutPktsTooLong++;
657 u64_stats_update_end(&secy_stats->syncp);
659 macsec_txsa_put(tx_sa);
661 return ERR_PTR(-EINVAL);
664 ret = skb_cow_data(skb, 0, &trailer);
665 if (unlikely(ret < 0)) {
666 macsec_txsa_put(tx_sa);
671 req = macsec_alloc_req(tx_sa->key.tfm, &iv, &sg, ret);
673 macsec_txsa_put(tx_sa);
675 return ERR_PTR(-ENOMEM);
679 macsec_fill_iv_xpn(iv, tx_sa->ssci, pn.full64, tx_sa->key.salt);
681 macsec_fill_iv(iv, secy->sci, pn.lower);
683 sg_init_table(sg, ret);
684 ret = skb_to_sgvec(skb, sg, 0, skb->len);
685 if (unlikely(ret < 0)) {
686 aead_request_free(req);
687 macsec_txsa_put(tx_sa);
692 if (tx_sc->encrypt) {
693 int len = skb->len - macsec_hdr_len(sci_present) -
695 aead_request_set_crypt(req, sg, sg, len, iv);
696 aead_request_set_ad(req, macsec_hdr_len(sci_present));
698 aead_request_set_crypt(req, sg, sg, 0, iv);
699 aead_request_set_ad(req, skb->len - secy->icv_len);
702 macsec_skb_cb(skb)->req = req;
703 macsec_skb_cb(skb)->tx_sa = tx_sa;
704 aead_request_set_callback(req, 0, macsec_encrypt_done, skb);
707 ret = crypto_aead_encrypt(req);
708 if (ret == -EINPROGRESS) {
710 } else if (ret != 0) {
713 aead_request_free(req);
714 macsec_txsa_put(tx_sa);
715 return ERR_PTR(-EINVAL);
719 aead_request_free(req);
720 macsec_txsa_put(tx_sa);
725 static bool macsec_post_decrypt(struct sk_buff *skb, struct macsec_secy *secy, u32 pn)
727 struct macsec_rx_sa *rx_sa = macsec_skb_cb(skb)->rx_sa;
728 struct pcpu_rx_sc_stats *rxsc_stats = this_cpu_ptr(rx_sa->sc->stats);
729 struct macsec_eth_header *hdr = macsec_ethhdr(skb);
732 spin_lock(&rx_sa->lock);
733 if (rx_sa->next_pn_halves.lower >= secy->replay_window)
734 lowest_pn = rx_sa->next_pn_halves.lower - secy->replay_window;
736 /* Now perform replay protection check again
737 * (see IEEE 802.1AE-2006 figure 10-5)
739 if (secy->replay_protect && pn < lowest_pn &&
740 (!secy->xpn || pn_same_half(pn, lowest_pn))) {
741 spin_unlock(&rx_sa->lock);
742 u64_stats_update_begin(&rxsc_stats->syncp);
743 rxsc_stats->stats.InPktsLate++;
744 u64_stats_update_end(&rxsc_stats->syncp);
748 if (secy->validate_frames != MACSEC_VALIDATE_DISABLED) {
749 u64_stats_update_begin(&rxsc_stats->syncp);
750 if (hdr->tci_an & MACSEC_TCI_E)
751 rxsc_stats->stats.InOctetsDecrypted += skb->len;
753 rxsc_stats->stats.InOctetsValidated += skb->len;
754 u64_stats_update_end(&rxsc_stats->syncp);
757 if (!macsec_skb_cb(skb)->valid) {
758 spin_unlock(&rx_sa->lock);
761 if (hdr->tci_an & MACSEC_TCI_C ||
762 secy->validate_frames == MACSEC_VALIDATE_STRICT) {
763 u64_stats_update_begin(&rxsc_stats->syncp);
764 rxsc_stats->stats.InPktsNotValid++;
765 u64_stats_update_end(&rxsc_stats->syncp);
769 u64_stats_update_begin(&rxsc_stats->syncp);
770 if (secy->validate_frames == MACSEC_VALIDATE_CHECK) {
771 rxsc_stats->stats.InPktsInvalid++;
772 this_cpu_inc(rx_sa->stats->InPktsInvalid);
773 } else if (pn < lowest_pn) {
774 rxsc_stats->stats.InPktsDelayed++;
776 rxsc_stats->stats.InPktsUnchecked++;
778 u64_stats_update_end(&rxsc_stats->syncp);
780 u64_stats_update_begin(&rxsc_stats->syncp);
781 if (pn < lowest_pn) {
782 rxsc_stats->stats.InPktsDelayed++;
784 rxsc_stats->stats.InPktsOK++;
785 this_cpu_inc(rx_sa->stats->InPktsOK);
787 u64_stats_update_end(&rxsc_stats->syncp);
789 // Instead of "pn >=" - to support pn overflow in xpn
790 if (pn + 1 > rx_sa->next_pn_halves.lower) {
791 rx_sa->next_pn_halves.lower = pn + 1;
792 } else if (secy->xpn &&
793 !pn_same_half(pn, rx_sa->next_pn_halves.lower)) {
794 rx_sa->next_pn_halves.upper++;
795 rx_sa->next_pn_halves.lower = pn + 1;
798 spin_unlock(&rx_sa->lock);
804 static void macsec_reset_skb(struct sk_buff *skb, struct net_device *dev)
806 skb->pkt_type = PACKET_HOST;
807 skb->protocol = eth_type_trans(skb, dev);
809 skb_reset_network_header(skb);
810 if (!skb_transport_header_was_set(skb))
811 skb_reset_transport_header(skb);
812 skb_reset_mac_len(skb);
815 static void macsec_finalize_skb(struct sk_buff *skb, u8 icv_len, u8 hdr_len)
817 skb->ip_summed = CHECKSUM_NONE;
818 memmove(skb->data + hdr_len, skb->data, 2 * ETH_ALEN);
819 skb_pull(skb, hdr_len);
820 pskb_trim_unique(skb, skb->len - icv_len);
823 static void count_rx(struct net_device *dev, int len)
825 struct pcpu_sw_netstats *stats = this_cpu_ptr(dev->tstats);
827 u64_stats_update_begin(&stats->syncp);
829 stats->rx_bytes += len;
830 u64_stats_update_end(&stats->syncp);
833 static void macsec_decrypt_done(struct crypto_async_request *base, int err)
835 struct sk_buff *skb = base->data;
836 struct net_device *dev = skb->dev;
837 struct macsec_dev *macsec = macsec_priv(dev);
838 struct macsec_rx_sa *rx_sa = macsec_skb_cb(skb)->rx_sa;
839 struct macsec_rx_sc *rx_sc = rx_sa->sc;
843 aead_request_free(macsec_skb_cb(skb)->req);
846 macsec_skb_cb(skb)->valid = true;
849 pn = ntohl(macsec_ethhdr(skb)->packet_number);
850 if (!macsec_post_decrypt(skb, &macsec->secy, pn)) {
851 rcu_read_unlock_bh();
856 macsec_finalize_skb(skb, macsec->secy.icv_len,
857 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
858 macsec_reset_skb(skb, macsec->secy.netdev);
861 if (gro_cells_receive(&macsec->gro_cells, skb) == NET_RX_SUCCESS)
864 rcu_read_unlock_bh();
867 macsec_rxsa_put(rx_sa);
868 macsec_rxsc_put(rx_sc);
872 static struct sk_buff *macsec_decrypt(struct sk_buff *skb,
873 struct net_device *dev,
874 struct macsec_rx_sa *rx_sa,
876 struct macsec_secy *secy)
879 struct scatterlist *sg;
880 struct sk_buff *trailer;
882 struct aead_request *req;
883 struct macsec_eth_header *hdr;
885 u16 icv_len = secy->icv_len;
887 macsec_skb_cb(skb)->valid = false;
888 skb = skb_share_check(skb, GFP_ATOMIC);
890 return ERR_PTR(-ENOMEM);
892 ret = skb_cow_data(skb, 0, &trailer);
893 if (unlikely(ret < 0)) {
897 req = macsec_alloc_req(rx_sa->key.tfm, &iv, &sg, ret);
900 return ERR_PTR(-ENOMEM);
903 hdr = (struct macsec_eth_header *)skb->data;
904 hdr_pn = ntohl(hdr->packet_number);
907 pn_t recovered_pn = rx_sa->next_pn_halves;
909 recovered_pn.lower = hdr_pn;
910 if (hdr_pn < rx_sa->next_pn_halves.lower &&
911 !pn_same_half(hdr_pn, rx_sa->next_pn_halves.lower))
912 recovered_pn.upper++;
914 macsec_fill_iv_xpn(iv, rx_sa->ssci, recovered_pn.full64,
917 macsec_fill_iv(iv, sci, hdr_pn);
920 sg_init_table(sg, ret);
921 ret = skb_to_sgvec(skb, sg, 0, skb->len);
922 if (unlikely(ret < 0)) {
923 aead_request_free(req);
928 if (hdr->tci_an & MACSEC_TCI_E) {
929 /* confidentiality: ethernet + macsec header
930 * authenticated, encrypted payload
932 int len = skb->len - macsec_hdr_len(macsec_skb_cb(skb)->has_sci);
934 aead_request_set_crypt(req, sg, sg, len, iv);
935 aead_request_set_ad(req, macsec_hdr_len(macsec_skb_cb(skb)->has_sci));
936 skb = skb_unshare(skb, GFP_ATOMIC);
938 aead_request_free(req);
939 return ERR_PTR(-ENOMEM);
942 /* integrity only: all headers + data authenticated */
943 aead_request_set_crypt(req, sg, sg, icv_len, iv);
944 aead_request_set_ad(req, skb->len - icv_len);
947 macsec_skb_cb(skb)->req = req;
949 aead_request_set_callback(req, 0, macsec_decrypt_done, skb);
952 ret = crypto_aead_decrypt(req);
953 if (ret == -EINPROGRESS) {
955 } else if (ret != 0) {
956 /* decryption/authentication failed
957 * 10.6 if validateFrames is disabled, deliver anyway
959 if (ret != -EBADMSG) {
964 macsec_skb_cb(skb)->valid = true;
968 aead_request_free(req);
973 static struct macsec_rx_sc *find_rx_sc(struct macsec_secy *secy, sci_t sci)
975 struct macsec_rx_sc *rx_sc;
977 for_each_rxsc(secy, rx_sc) {
978 if (rx_sc->sci == sci)
985 static struct macsec_rx_sc *find_rx_sc_rtnl(struct macsec_secy *secy, sci_t sci)
987 struct macsec_rx_sc *rx_sc;
989 for_each_rxsc_rtnl(secy, rx_sc) {
990 if (rx_sc->sci == sci)
997 static enum rx_handler_result handle_not_macsec(struct sk_buff *skb)
999 /* Deliver to the uncontrolled port by default */
1000 enum rx_handler_result ret = RX_HANDLER_PASS;
1001 struct ethhdr *hdr = eth_hdr(skb);
1002 struct macsec_rxh_data *rxd;
1003 struct macsec_dev *macsec;
1006 rxd = macsec_data_rcu(skb->dev);
1008 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1009 struct sk_buff *nskb;
1010 struct pcpu_secy_stats *secy_stats = this_cpu_ptr(macsec->stats);
1011 struct net_device *ndev = macsec->secy.netdev;
1013 /* If h/w offloading is enabled, HW decodes frames and strips
1014 * the SecTAG, so we have to deduce which port to deliver to.
1016 if (macsec_is_offloaded(macsec) && netif_running(ndev)) {
1017 if (ether_addr_equal_64bits(hdr->h_dest,
1019 /* exact match, divert skb to this port */
1021 skb->pkt_type = PACKET_HOST;
1022 ret = RX_HANDLER_ANOTHER;
1024 } else if (is_multicast_ether_addr_64bits(
1026 /* multicast frame, deliver on this port too */
1027 nskb = skb_clone(skb, GFP_ATOMIC);
1032 if (ether_addr_equal_64bits(hdr->h_dest,
1034 nskb->pkt_type = PACKET_BROADCAST;
1036 nskb->pkt_type = PACKET_MULTICAST;
1043 /* 10.6 If the management control validateFrames is not
1044 * Strict, frames without a SecTAG are received, counted, and
1045 * delivered to the Controlled Port
1047 if (macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) {
1048 u64_stats_update_begin(&secy_stats->syncp);
1049 secy_stats->stats.InPktsNoTag++;
1050 u64_stats_update_end(&secy_stats->syncp);
1054 /* deliver on this port */
1055 nskb = skb_clone(skb, GFP_ATOMIC);
1061 if (__netif_rx(nskb) == NET_RX_SUCCESS) {
1062 u64_stats_update_begin(&secy_stats->syncp);
1063 secy_stats->stats.InPktsUntagged++;
1064 u64_stats_update_end(&secy_stats->syncp);
1073 static rx_handler_result_t macsec_handle_frame(struct sk_buff **pskb)
1075 struct sk_buff *skb = *pskb;
1076 struct net_device *dev = skb->dev;
1077 struct macsec_eth_header *hdr;
1078 struct macsec_secy *secy = NULL;
1079 struct macsec_rx_sc *rx_sc;
1080 struct macsec_rx_sa *rx_sa;
1081 struct macsec_rxh_data *rxd;
1082 struct macsec_dev *macsec;
1087 struct pcpu_rx_sc_stats *rxsc_stats;
1088 struct pcpu_secy_stats *secy_stats;
1092 if (skb_headroom(skb) < ETH_HLEN)
1095 hdr = macsec_ethhdr(skb);
1096 if (hdr->eth.h_proto != htons(ETH_P_MACSEC))
1097 return handle_not_macsec(skb);
1099 skb = skb_unshare(skb, GFP_ATOMIC);
1102 return RX_HANDLER_CONSUMED;
1104 pulled_sci = pskb_may_pull(skb, macsec_extra_len(true));
1106 if (!pskb_may_pull(skb, macsec_extra_len(false)))
1110 hdr = macsec_ethhdr(skb);
1112 /* Frames with a SecTAG that has the TCI E bit set but the C
1113 * bit clear are discarded, as this reserved encoding is used
1114 * to identify frames with a SecTAG that are not to be
1115 * delivered to the Controlled Port.
1117 if ((hdr->tci_an & (MACSEC_TCI_C | MACSEC_TCI_E)) == MACSEC_TCI_E)
1118 return RX_HANDLER_PASS;
1120 /* now, pull the extra length */
1121 if (hdr->tci_an & MACSEC_TCI_SC) {
1126 /* ethernet header is part of crypto processing */
1127 skb_push(skb, ETH_HLEN);
1129 macsec_skb_cb(skb)->has_sci = !!(hdr->tci_an & MACSEC_TCI_SC);
1130 macsec_skb_cb(skb)->assoc_num = hdr->tci_an & MACSEC_AN_MASK;
1131 sci = macsec_frame_sci(hdr, macsec_skb_cb(skb)->has_sci);
1134 rxd = macsec_data_rcu(skb->dev);
1136 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1137 struct macsec_rx_sc *sc = find_rx_sc(&macsec->secy, sci);
1139 sc = sc ? macsec_rxsc_get(sc) : NULL;
1142 secy = &macsec->secy;
1152 macsec = macsec_priv(dev);
1153 secy_stats = this_cpu_ptr(macsec->stats);
1154 rxsc_stats = this_cpu_ptr(rx_sc->stats);
1156 if (!macsec_validate_skb(skb, secy->icv_len, secy->xpn)) {
1157 u64_stats_update_begin(&secy_stats->syncp);
1158 secy_stats->stats.InPktsBadTag++;
1159 u64_stats_update_end(&secy_stats->syncp);
1163 rx_sa = macsec_rxsa_get(rx_sc->sa[macsec_skb_cb(skb)->assoc_num]);
1165 /* 10.6.1 if the SA is not in use */
1167 /* If validateFrames is Strict or the C bit in the
1168 * SecTAG is set, discard
1170 if (hdr->tci_an & MACSEC_TCI_C ||
1171 secy->validate_frames == MACSEC_VALIDATE_STRICT) {
1172 u64_stats_update_begin(&rxsc_stats->syncp);
1173 rxsc_stats->stats.InPktsNotUsingSA++;
1174 u64_stats_update_end(&rxsc_stats->syncp);
1178 /* not Strict, the frame (with the SecTAG and ICV
1179 * removed) is delivered to the Controlled Port.
1181 u64_stats_update_begin(&rxsc_stats->syncp);
1182 rxsc_stats->stats.InPktsUnusedSA++;
1183 u64_stats_update_end(&rxsc_stats->syncp);
1187 /* First, PN check to avoid decrypting obviously wrong packets */
1188 hdr_pn = ntohl(hdr->packet_number);
1189 if (secy->replay_protect) {
1192 spin_lock(&rx_sa->lock);
1193 late = rx_sa->next_pn_halves.lower >= secy->replay_window &&
1194 hdr_pn < (rx_sa->next_pn_halves.lower - secy->replay_window);
1197 late = late && pn_same_half(rx_sa->next_pn_halves.lower, hdr_pn);
1198 spin_unlock(&rx_sa->lock);
1201 u64_stats_update_begin(&rxsc_stats->syncp);
1202 rxsc_stats->stats.InPktsLate++;
1203 u64_stats_update_end(&rxsc_stats->syncp);
1208 macsec_skb_cb(skb)->rx_sa = rx_sa;
1210 /* Disabled && !changed text => skip validation */
1211 if (hdr->tci_an & MACSEC_TCI_C ||
1212 secy->validate_frames != MACSEC_VALIDATE_DISABLED)
1213 skb = macsec_decrypt(skb, dev, rx_sa, sci, secy);
1216 /* the decrypt callback needs the reference */
1217 if (PTR_ERR(skb) != -EINPROGRESS) {
1218 macsec_rxsa_put(rx_sa);
1219 macsec_rxsc_put(rx_sc);
1223 return RX_HANDLER_CONSUMED;
1226 if (!macsec_post_decrypt(skb, secy, hdr_pn))
1230 macsec_finalize_skb(skb, secy->icv_len,
1231 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
1232 macsec_reset_skb(skb, secy->netdev);
1235 macsec_rxsa_put(rx_sa);
1236 macsec_rxsc_put(rx_sc);
1240 ret = gro_cells_receive(&macsec->gro_cells, skb);
1241 if (ret == NET_RX_SUCCESS)
1244 macsec->secy.netdev->stats.rx_dropped++;
1249 return RX_HANDLER_CONSUMED;
1252 macsec_rxsa_put(rx_sa);
1254 macsec_rxsc_put(rx_sc);
1259 return RX_HANDLER_CONSUMED;
1262 /* 10.6.1 if the SC is not found */
1263 cbit = !!(hdr->tci_an & MACSEC_TCI_C);
1265 macsec_finalize_skb(skb, DEFAULT_ICV_LEN,
1266 macsec_extra_len(macsec_skb_cb(skb)->has_sci));
1268 list_for_each_entry_rcu(macsec, &rxd->secys, secys) {
1269 struct sk_buff *nskb;
1271 secy_stats = this_cpu_ptr(macsec->stats);
1273 /* If validateFrames is Strict or the C bit in the
1274 * SecTAG is set, discard
1277 macsec->secy.validate_frames == MACSEC_VALIDATE_STRICT) {
1278 u64_stats_update_begin(&secy_stats->syncp);
1279 secy_stats->stats.InPktsNoSCI++;
1280 u64_stats_update_end(&secy_stats->syncp);
1284 /* not strict, the frame (with the SecTAG and ICV
1285 * removed) is delivered to the Controlled Port.
1287 nskb = skb_clone(skb, GFP_ATOMIC);
1291 macsec_reset_skb(nskb, macsec->secy.netdev);
1293 ret = __netif_rx(nskb);
1294 if (ret == NET_RX_SUCCESS) {
1295 u64_stats_update_begin(&secy_stats->syncp);
1296 secy_stats->stats.InPktsUnknownSCI++;
1297 u64_stats_update_end(&secy_stats->syncp);
1299 macsec->secy.netdev->stats.rx_dropped++;
1305 return RX_HANDLER_PASS;
1308 static struct crypto_aead *macsec_alloc_tfm(char *key, int key_len, int icv_len)
1310 struct crypto_aead *tfm;
1313 /* Pick a sync gcm(aes) cipher to ensure order is preserved. */
1314 tfm = crypto_alloc_aead("gcm(aes)", 0, CRYPTO_ALG_ASYNC);
1319 ret = crypto_aead_setkey(tfm, key, key_len);
1323 ret = crypto_aead_setauthsize(tfm, icv_len);
1329 crypto_free_aead(tfm);
1330 return ERR_PTR(ret);
1333 static int init_rx_sa(struct macsec_rx_sa *rx_sa, char *sak, int key_len,
1336 rx_sa->stats = alloc_percpu(struct macsec_rx_sa_stats);
1340 rx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len);
1341 if (IS_ERR(rx_sa->key.tfm)) {
1342 free_percpu(rx_sa->stats);
1343 return PTR_ERR(rx_sa->key.tfm);
1346 rx_sa->ssci = MACSEC_UNDEF_SSCI;
1347 rx_sa->active = false;
1349 refcount_set(&rx_sa->refcnt, 1);
1350 spin_lock_init(&rx_sa->lock);
1355 static void clear_rx_sa(struct macsec_rx_sa *rx_sa)
1357 rx_sa->active = false;
1359 macsec_rxsa_put(rx_sa);
1362 static void free_rx_sc(struct macsec_rx_sc *rx_sc)
1366 for (i = 0; i < MACSEC_NUM_AN; i++) {
1367 struct macsec_rx_sa *sa = rtnl_dereference(rx_sc->sa[i]);
1369 RCU_INIT_POINTER(rx_sc->sa[i], NULL);
1374 macsec_rxsc_put(rx_sc);
1377 static struct macsec_rx_sc *del_rx_sc(struct macsec_secy *secy, sci_t sci)
1379 struct macsec_rx_sc *rx_sc, __rcu **rx_scp;
1381 for (rx_scp = &secy->rx_sc, rx_sc = rtnl_dereference(*rx_scp);
1383 rx_scp = &rx_sc->next, rx_sc = rtnl_dereference(*rx_scp)) {
1384 if (rx_sc->sci == sci) {
1387 rcu_assign_pointer(*rx_scp, rx_sc->next);
1395 static struct macsec_rx_sc *create_rx_sc(struct net_device *dev, sci_t sci)
1397 struct macsec_rx_sc *rx_sc;
1398 struct macsec_dev *macsec;
1399 struct net_device *real_dev = macsec_priv(dev)->real_dev;
1400 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
1401 struct macsec_secy *secy;
1403 list_for_each_entry(macsec, &rxd->secys, secys) {
1404 if (find_rx_sc_rtnl(&macsec->secy, sci))
1405 return ERR_PTR(-EEXIST);
1408 rx_sc = kzalloc(sizeof(*rx_sc), GFP_KERNEL);
1410 return ERR_PTR(-ENOMEM);
1412 rx_sc->stats = netdev_alloc_pcpu_stats(struct pcpu_rx_sc_stats);
1413 if (!rx_sc->stats) {
1415 return ERR_PTR(-ENOMEM);
1419 rx_sc->active = true;
1420 refcount_set(&rx_sc->refcnt, 1);
1422 secy = &macsec_priv(dev)->secy;
1423 rcu_assign_pointer(rx_sc->next, secy->rx_sc);
1424 rcu_assign_pointer(secy->rx_sc, rx_sc);
1432 static int init_tx_sa(struct macsec_tx_sa *tx_sa, char *sak, int key_len,
1435 tx_sa->stats = alloc_percpu(struct macsec_tx_sa_stats);
1439 tx_sa->key.tfm = macsec_alloc_tfm(sak, key_len, icv_len);
1440 if (IS_ERR(tx_sa->key.tfm)) {
1441 free_percpu(tx_sa->stats);
1442 return PTR_ERR(tx_sa->key.tfm);
1445 tx_sa->ssci = MACSEC_UNDEF_SSCI;
1446 tx_sa->active = false;
1447 refcount_set(&tx_sa->refcnt, 1);
1448 spin_lock_init(&tx_sa->lock);
1453 static void clear_tx_sa(struct macsec_tx_sa *tx_sa)
1455 tx_sa->active = false;
1457 macsec_txsa_put(tx_sa);
1460 static struct genl_family macsec_fam;
1462 static struct net_device *get_dev_from_nl(struct net *net,
1463 struct nlattr **attrs)
1465 int ifindex = nla_get_u32(attrs[MACSEC_ATTR_IFINDEX]);
1466 struct net_device *dev;
1468 dev = __dev_get_by_index(net, ifindex);
1470 return ERR_PTR(-ENODEV);
1472 if (!netif_is_macsec(dev))
1473 return ERR_PTR(-ENODEV);
1478 static enum macsec_offload nla_get_offload(const struct nlattr *nla)
1480 return (__force enum macsec_offload)nla_get_u8(nla);
1483 static sci_t nla_get_sci(const struct nlattr *nla)
1485 return (__force sci_t)nla_get_u64(nla);
1488 static int nla_put_sci(struct sk_buff *skb, int attrtype, sci_t value,
1491 return nla_put_u64_64bit(skb, attrtype, (__force u64)value, padattr);
1494 static ssci_t nla_get_ssci(const struct nlattr *nla)
1496 return (__force ssci_t)nla_get_u32(nla);
1499 static int nla_put_ssci(struct sk_buff *skb, int attrtype, ssci_t value)
1501 return nla_put_u32(skb, attrtype, (__force u64)value);
1504 static struct macsec_tx_sa *get_txsa_from_nl(struct net *net,
1505 struct nlattr **attrs,
1506 struct nlattr **tb_sa,
1507 struct net_device **devp,
1508 struct macsec_secy **secyp,
1509 struct macsec_tx_sc **scp,
1512 struct net_device *dev;
1513 struct macsec_secy *secy;
1514 struct macsec_tx_sc *tx_sc;
1515 struct macsec_tx_sa *tx_sa;
1517 if (!tb_sa[MACSEC_SA_ATTR_AN])
1518 return ERR_PTR(-EINVAL);
1520 *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1522 dev = get_dev_from_nl(net, attrs);
1524 return ERR_CAST(dev);
1526 if (*assoc_num >= MACSEC_NUM_AN)
1527 return ERR_PTR(-EINVAL);
1529 secy = &macsec_priv(dev)->secy;
1530 tx_sc = &secy->tx_sc;
1532 tx_sa = rtnl_dereference(tx_sc->sa[*assoc_num]);
1534 return ERR_PTR(-ENODEV);
1542 static struct macsec_rx_sc *get_rxsc_from_nl(struct net *net,
1543 struct nlattr **attrs,
1544 struct nlattr **tb_rxsc,
1545 struct net_device **devp,
1546 struct macsec_secy **secyp)
1548 struct net_device *dev;
1549 struct macsec_secy *secy;
1550 struct macsec_rx_sc *rx_sc;
1553 dev = get_dev_from_nl(net, attrs);
1555 return ERR_CAST(dev);
1557 secy = &macsec_priv(dev)->secy;
1559 if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI])
1560 return ERR_PTR(-EINVAL);
1562 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1563 rx_sc = find_rx_sc_rtnl(secy, sci);
1565 return ERR_PTR(-ENODEV);
1573 static struct macsec_rx_sa *get_rxsa_from_nl(struct net *net,
1574 struct nlattr **attrs,
1575 struct nlattr **tb_rxsc,
1576 struct nlattr **tb_sa,
1577 struct net_device **devp,
1578 struct macsec_secy **secyp,
1579 struct macsec_rx_sc **scp,
1582 struct macsec_rx_sc *rx_sc;
1583 struct macsec_rx_sa *rx_sa;
1585 if (!tb_sa[MACSEC_SA_ATTR_AN])
1586 return ERR_PTR(-EINVAL);
1588 *assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1589 if (*assoc_num >= MACSEC_NUM_AN)
1590 return ERR_PTR(-EINVAL);
1592 rx_sc = get_rxsc_from_nl(net, attrs, tb_rxsc, devp, secyp);
1594 return ERR_CAST(rx_sc);
1596 rx_sa = rtnl_dereference(rx_sc->sa[*assoc_num]);
1598 return ERR_PTR(-ENODEV);
1604 static const struct nla_policy macsec_genl_policy[NUM_MACSEC_ATTR] = {
1605 [MACSEC_ATTR_IFINDEX] = { .type = NLA_U32 },
1606 [MACSEC_ATTR_RXSC_CONFIG] = { .type = NLA_NESTED },
1607 [MACSEC_ATTR_SA_CONFIG] = { .type = NLA_NESTED },
1608 [MACSEC_ATTR_OFFLOAD] = { .type = NLA_NESTED },
1611 static const struct nla_policy macsec_genl_rxsc_policy[NUM_MACSEC_RXSC_ATTR] = {
1612 [MACSEC_RXSC_ATTR_SCI] = { .type = NLA_U64 },
1613 [MACSEC_RXSC_ATTR_ACTIVE] = { .type = NLA_U8 },
1616 static const struct nla_policy macsec_genl_sa_policy[NUM_MACSEC_SA_ATTR] = {
1617 [MACSEC_SA_ATTR_AN] = { .type = NLA_U8 },
1618 [MACSEC_SA_ATTR_ACTIVE] = { .type = NLA_U8 },
1619 [MACSEC_SA_ATTR_PN] = NLA_POLICY_MIN_LEN(4),
1620 [MACSEC_SA_ATTR_KEYID] = { .type = NLA_BINARY,
1621 .len = MACSEC_KEYID_LEN, },
1622 [MACSEC_SA_ATTR_KEY] = { .type = NLA_BINARY,
1623 .len = MACSEC_MAX_KEY_LEN, },
1624 [MACSEC_SA_ATTR_SSCI] = { .type = NLA_U32 },
1625 [MACSEC_SA_ATTR_SALT] = { .type = NLA_BINARY,
1626 .len = MACSEC_SALT_LEN, },
1629 static const struct nla_policy macsec_genl_offload_policy[NUM_MACSEC_OFFLOAD_ATTR] = {
1630 [MACSEC_OFFLOAD_ATTR_TYPE] = { .type = NLA_U8 },
1633 /* Offloads an operation to a device driver */
1634 static int macsec_offload(int (* const func)(struct macsec_context *),
1635 struct macsec_context *ctx)
1639 if (unlikely(!func))
1642 if (ctx->offload == MACSEC_OFFLOAD_PHY)
1643 mutex_lock(&ctx->phydev->lock);
1645 /* Phase I: prepare. The drive should fail here if there are going to be
1646 * issues in the commit phase.
1648 ctx->prepare = true;
1653 /* Phase II: commit. This step cannot fail. */
1654 ctx->prepare = false;
1656 /* This should never happen: commit is not allowed to fail */
1658 WARN(1, "MACsec offloading commit failed (%d)\n", ret);
1661 if (ctx->offload == MACSEC_OFFLOAD_PHY)
1662 mutex_unlock(&ctx->phydev->lock);
1667 static int parse_sa_config(struct nlattr **attrs, struct nlattr **tb_sa)
1669 if (!attrs[MACSEC_ATTR_SA_CONFIG])
1672 if (nla_parse_nested_deprecated(tb_sa, MACSEC_SA_ATTR_MAX, attrs[MACSEC_ATTR_SA_CONFIG], macsec_genl_sa_policy, NULL))
1678 static int parse_rxsc_config(struct nlattr **attrs, struct nlattr **tb_rxsc)
1680 if (!attrs[MACSEC_ATTR_RXSC_CONFIG])
1683 if (nla_parse_nested_deprecated(tb_rxsc, MACSEC_RXSC_ATTR_MAX, attrs[MACSEC_ATTR_RXSC_CONFIG], macsec_genl_rxsc_policy, NULL))
1689 static bool validate_add_rxsa(struct nlattr **attrs)
1691 if (!attrs[MACSEC_SA_ATTR_AN] ||
1692 !attrs[MACSEC_SA_ATTR_KEY] ||
1693 !attrs[MACSEC_SA_ATTR_KEYID])
1696 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
1699 if (attrs[MACSEC_SA_ATTR_PN] &&
1700 *(u64 *)nla_data(attrs[MACSEC_SA_ATTR_PN]) == 0)
1703 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
1704 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
1708 if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN)
1714 static int macsec_add_rxsa(struct sk_buff *skb, struct genl_info *info)
1716 struct net_device *dev;
1717 struct nlattr **attrs = info->attrs;
1718 struct macsec_secy *secy;
1719 struct macsec_rx_sc *rx_sc;
1720 struct macsec_rx_sa *rx_sa;
1721 unsigned char assoc_num;
1723 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1724 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1727 if (!attrs[MACSEC_ATTR_IFINDEX])
1730 if (parse_sa_config(attrs, tb_sa))
1733 if (parse_rxsc_config(attrs, tb_rxsc))
1736 if (!validate_add_rxsa(tb_sa))
1740 rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy);
1741 if (IS_ERR(rx_sc)) {
1743 return PTR_ERR(rx_sc);
1746 assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1748 if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) {
1749 pr_notice("macsec: nl: add_rxsa: bad key length: %d != %d\n",
1750 nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len);
1755 pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
1756 if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
1757 pr_notice("macsec: nl: add_rxsa: bad pn length: %d != %d\n",
1758 nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
1764 if (!tb_sa[MACSEC_SA_ATTR_SSCI] || !tb_sa[MACSEC_SA_ATTR_SALT]) {
1769 if (nla_len(tb_sa[MACSEC_SA_ATTR_SALT]) != MACSEC_SALT_LEN) {
1770 pr_notice("macsec: nl: add_rxsa: bad salt length: %d != %d\n",
1771 nla_len(tb_sa[MACSEC_SA_ATTR_SALT]),
1772 MACSEC_SA_ATTR_SALT);
1778 rx_sa = rtnl_dereference(rx_sc->sa[assoc_num]);
1784 rx_sa = kmalloc(sizeof(*rx_sa), GFP_KERNEL);
1790 err = init_rx_sa(rx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
1791 secy->key_len, secy->icv_len);
1798 if (tb_sa[MACSEC_SA_ATTR_PN]) {
1799 spin_lock_bh(&rx_sa->lock);
1800 rx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
1801 spin_unlock_bh(&rx_sa->lock);
1804 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
1805 rx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
1809 /* If h/w offloading is available, propagate to the device */
1810 if (macsec_is_offloaded(netdev_priv(dev))) {
1811 const struct macsec_ops *ops;
1812 struct macsec_context ctx;
1814 ops = macsec_get_ops(netdev_priv(dev), &ctx);
1820 ctx.sa.assoc_num = assoc_num;
1821 ctx.sa.rx_sa = rx_sa;
1823 memcpy(ctx.sa.key, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
1826 err = macsec_offload(ops->mdo_add_rxsa, &ctx);
1832 rx_sa->ssci = nla_get_ssci(tb_sa[MACSEC_SA_ATTR_SSCI]);
1833 nla_memcpy(rx_sa->key.salt.bytes, tb_sa[MACSEC_SA_ATTR_SALT],
1837 nla_memcpy(rx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN);
1838 rcu_assign_pointer(rx_sc->sa[assoc_num], rx_sa);
1850 static bool validate_add_rxsc(struct nlattr **attrs)
1852 if (!attrs[MACSEC_RXSC_ATTR_SCI])
1855 if (attrs[MACSEC_RXSC_ATTR_ACTIVE]) {
1856 if (nla_get_u8(attrs[MACSEC_RXSC_ATTR_ACTIVE]) > 1)
1863 static int macsec_add_rxsc(struct sk_buff *skb, struct genl_info *info)
1865 struct net_device *dev;
1866 sci_t sci = MACSEC_UNDEF_SCI;
1867 struct nlattr **attrs = info->attrs;
1868 struct macsec_rx_sc *rx_sc;
1869 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
1870 struct macsec_secy *secy;
1874 if (!attrs[MACSEC_ATTR_IFINDEX])
1877 if (parse_rxsc_config(attrs, tb_rxsc))
1880 if (!validate_add_rxsc(tb_rxsc))
1884 dev = get_dev_from_nl(genl_info_net(info), attrs);
1887 return PTR_ERR(dev);
1890 secy = &macsec_priv(dev)->secy;
1891 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
1893 rx_sc = create_rx_sc(dev, sci);
1894 if (IS_ERR(rx_sc)) {
1896 return PTR_ERR(rx_sc);
1899 was_active = rx_sc->active;
1900 if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE])
1901 rx_sc->active = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]);
1903 if (macsec_is_offloaded(netdev_priv(dev))) {
1904 const struct macsec_ops *ops;
1905 struct macsec_context ctx;
1907 ops = macsec_get_ops(netdev_priv(dev), &ctx);
1916 ret = macsec_offload(ops->mdo_add_rxsc, &ctx);
1926 rx_sc->active = was_active;
1931 static bool validate_add_txsa(struct nlattr **attrs)
1933 if (!attrs[MACSEC_SA_ATTR_AN] ||
1934 !attrs[MACSEC_SA_ATTR_PN] ||
1935 !attrs[MACSEC_SA_ATTR_KEY] ||
1936 !attrs[MACSEC_SA_ATTR_KEYID])
1939 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
1942 if (nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0)
1945 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
1946 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
1950 if (nla_len(attrs[MACSEC_SA_ATTR_KEYID]) != MACSEC_KEYID_LEN)
1956 static int macsec_add_txsa(struct sk_buff *skb, struct genl_info *info)
1958 struct net_device *dev;
1959 struct nlattr **attrs = info->attrs;
1960 struct macsec_secy *secy;
1961 struct macsec_tx_sc *tx_sc;
1962 struct macsec_tx_sa *tx_sa;
1963 unsigned char assoc_num;
1965 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
1966 bool was_operational;
1969 if (!attrs[MACSEC_ATTR_IFINDEX])
1972 if (parse_sa_config(attrs, tb_sa))
1975 if (!validate_add_txsa(tb_sa))
1979 dev = get_dev_from_nl(genl_info_net(info), attrs);
1982 return PTR_ERR(dev);
1985 secy = &macsec_priv(dev)->secy;
1986 tx_sc = &secy->tx_sc;
1988 assoc_num = nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]);
1990 if (nla_len(tb_sa[MACSEC_SA_ATTR_KEY]) != secy->key_len) {
1991 pr_notice("macsec: nl: add_txsa: bad key length: %d != %d\n",
1992 nla_len(tb_sa[MACSEC_SA_ATTR_KEY]), secy->key_len);
1997 pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
1998 if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
1999 pr_notice("macsec: nl: add_txsa: bad pn length: %d != %d\n",
2000 nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
2006 if (!tb_sa[MACSEC_SA_ATTR_SSCI] || !tb_sa[MACSEC_SA_ATTR_SALT]) {
2011 if (nla_len(tb_sa[MACSEC_SA_ATTR_SALT]) != MACSEC_SALT_LEN) {
2012 pr_notice("macsec: nl: add_txsa: bad salt length: %d != %d\n",
2013 nla_len(tb_sa[MACSEC_SA_ATTR_SALT]),
2014 MACSEC_SA_ATTR_SALT);
2020 tx_sa = rtnl_dereference(tx_sc->sa[assoc_num]);
2026 tx_sa = kmalloc(sizeof(*tx_sa), GFP_KERNEL);
2032 err = init_tx_sa(tx_sa, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
2033 secy->key_len, secy->icv_len);
2040 spin_lock_bh(&tx_sa->lock);
2041 tx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
2042 spin_unlock_bh(&tx_sa->lock);
2044 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2045 tx_sa->active = !!nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2047 was_operational = secy->operational;
2048 if (assoc_num == tx_sc->encoding_sa && tx_sa->active)
2049 secy->operational = true;
2051 /* If h/w offloading is available, propagate to the device */
2052 if (macsec_is_offloaded(netdev_priv(dev))) {
2053 const struct macsec_ops *ops;
2054 struct macsec_context ctx;
2056 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2062 ctx.sa.assoc_num = assoc_num;
2063 ctx.sa.tx_sa = tx_sa;
2065 memcpy(ctx.sa.key, nla_data(tb_sa[MACSEC_SA_ATTR_KEY]),
2068 err = macsec_offload(ops->mdo_add_txsa, &ctx);
2074 tx_sa->ssci = nla_get_ssci(tb_sa[MACSEC_SA_ATTR_SSCI]);
2075 nla_memcpy(tx_sa->key.salt.bytes, tb_sa[MACSEC_SA_ATTR_SALT],
2079 nla_memcpy(tx_sa->key.id, tb_sa[MACSEC_SA_ATTR_KEYID], MACSEC_KEYID_LEN);
2080 rcu_assign_pointer(tx_sc->sa[assoc_num], tx_sa);
2087 secy->operational = was_operational;
2093 static int macsec_del_rxsa(struct sk_buff *skb, struct genl_info *info)
2095 struct nlattr **attrs = info->attrs;
2096 struct net_device *dev;
2097 struct macsec_secy *secy;
2098 struct macsec_rx_sc *rx_sc;
2099 struct macsec_rx_sa *rx_sa;
2101 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2102 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2105 if (!attrs[MACSEC_ATTR_IFINDEX])
2108 if (parse_sa_config(attrs, tb_sa))
2111 if (parse_rxsc_config(attrs, tb_rxsc))
2115 rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa,
2116 &dev, &secy, &rx_sc, &assoc_num);
2117 if (IS_ERR(rx_sa)) {
2119 return PTR_ERR(rx_sa);
2122 if (rx_sa->active) {
2127 /* If h/w offloading is available, propagate to the device */
2128 if (macsec_is_offloaded(netdev_priv(dev))) {
2129 const struct macsec_ops *ops;
2130 struct macsec_context ctx;
2132 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2138 ctx.sa.assoc_num = assoc_num;
2139 ctx.sa.rx_sa = rx_sa;
2142 ret = macsec_offload(ops->mdo_del_rxsa, &ctx);
2147 RCU_INIT_POINTER(rx_sc->sa[assoc_num], NULL);
2159 static int macsec_del_rxsc(struct sk_buff *skb, struct genl_info *info)
2161 struct nlattr **attrs = info->attrs;
2162 struct net_device *dev;
2163 struct macsec_secy *secy;
2164 struct macsec_rx_sc *rx_sc;
2166 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2169 if (!attrs[MACSEC_ATTR_IFINDEX])
2172 if (parse_rxsc_config(attrs, tb_rxsc))
2175 if (!tb_rxsc[MACSEC_RXSC_ATTR_SCI])
2179 dev = get_dev_from_nl(genl_info_net(info), info->attrs);
2182 return PTR_ERR(dev);
2185 secy = &macsec_priv(dev)->secy;
2186 sci = nla_get_sci(tb_rxsc[MACSEC_RXSC_ATTR_SCI]);
2188 rx_sc = del_rx_sc(secy, sci);
2194 /* If h/w offloading is available, propagate to the device */
2195 if (macsec_is_offloaded(netdev_priv(dev))) {
2196 const struct macsec_ops *ops;
2197 struct macsec_context ctx;
2199 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2207 ret = macsec_offload(ops->mdo_del_rxsc, &ctx);
2222 static int macsec_del_txsa(struct sk_buff *skb, struct genl_info *info)
2224 struct nlattr **attrs = info->attrs;
2225 struct net_device *dev;
2226 struct macsec_secy *secy;
2227 struct macsec_tx_sc *tx_sc;
2228 struct macsec_tx_sa *tx_sa;
2230 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2233 if (!attrs[MACSEC_ATTR_IFINDEX])
2236 if (parse_sa_config(attrs, tb_sa))
2240 tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa,
2241 &dev, &secy, &tx_sc, &assoc_num);
2242 if (IS_ERR(tx_sa)) {
2244 return PTR_ERR(tx_sa);
2247 if (tx_sa->active) {
2252 /* If h/w offloading is available, propagate to the device */
2253 if (macsec_is_offloaded(netdev_priv(dev))) {
2254 const struct macsec_ops *ops;
2255 struct macsec_context ctx;
2257 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2263 ctx.sa.assoc_num = assoc_num;
2264 ctx.sa.tx_sa = tx_sa;
2267 ret = macsec_offload(ops->mdo_del_txsa, &ctx);
2272 RCU_INIT_POINTER(tx_sc->sa[assoc_num], NULL);
2284 static bool validate_upd_sa(struct nlattr **attrs)
2286 if (!attrs[MACSEC_SA_ATTR_AN] ||
2287 attrs[MACSEC_SA_ATTR_KEY] ||
2288 attrs[MACSEC_SA_ATTR_KEYID] ||
2289 attrs[MACSEC_SA_ATTR_SSCI] ||
2290 attrs[MACSEC_SA_ATTR_SALT])
2293 if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN)
2296 if (attrs[MACSEC_SA_ATTR_PN] && nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0)
2299 if (attrs[MACSEC_SA_ATTR_ACTIVE]) {
2300 if (nla_get_u8(attrs[MACSEC_SA_ATTR_ACTIVE]) > 1)
2307 static int macsec_upd_txsa(struct sk_buff *skb, struct genl_info *info)
2309 struct nlattr **attrs = info->attrs;
2310 struct net_device *dev;
2311 struct macsec_secy *secy;
2312 struct macsec_tx_sc *tx_sc;
2313 struct macsec_tx_sa *tx_sa;
2315 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2316 bool was_operational, was_active;
2322 if (!attrs[MACSEC_ATTR_IFINDEX])
2325 if (parse_sa_config(attrs, tb_sa))
2328 if (!validate_upd_sa(tb_sa))
2332 tx_sa = get_txsa_from_nl(genl_info_net(info), attrs, tb_sa,
2333 &dev, &secy, &tx_sc, &assoc_num);
2334 if (IS_ERR(tx_sa)) {
2336 return PTR_ERR(tx_sa);
2339 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2342 pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
2343 if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
2344 pr_notice("macsec: nl: upd_txsa: bad pn length: %d != %d\n",
2345 nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
2350 spin_lock_bh(&tx_sa->lock);
2351 prev_pn = tx_sa->next_pn_halves;
2352 tx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
2353 spin_unlock_bh(&tx_sa->lock);
2356 was_active = tx_sa->active;
2357 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2358 tx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2360 was_operational = secy->operational;
2361 if (assoc_num == tx_sc->encoding_sa)
2362 secy->operational = tx_sa->active;
2364 /* If h/w offloading is available, propagate to the device */
2365 if (macsec_is_offloaded(netdev_priv(dev))) {
2366 const struct macsec_ops *ops;
2367 struct macsec_context ctx;
2369 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2375 ctx.sa.assoc_num = assoc_num;
2376 ctx.sa.tx_sa = tx_sa;
2379 ret = macsec_offload(ops->mdo_upd_txsa, &ctx);
2389 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2390 spin_lock_bh(&tx_sa->lock);
2391 tx_sa->next_pn_halves = prev_pn;
2392 spin_unlock_bh(&tx_sa->lock);
2394 tx_sa->active = was_active;
2395 secy->operational = was_operational;
2400 static int macsec_upd_rxsa(struct sk_buff *skb, struct genl_info *info)
2402 struct nlattr **attrs = info->attrs;
2403 struct net_device *dev;
2404 struct macsec_secy *secy;
2405 struct macsec_rx_sc *rx_sc;
2406 struct macsec_rx_sa *rx_sa;
2408 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2409 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
2416 if (!attrs[MACSEC_ATTR_IFINDEX])
2419 if (parse_rxsc_config(attrs, tb_rxsc))
2422 if (parse_sa_config(attrs, tb_sa))
2425 if (!validate_upd_sa(tb_sa))
2429 rx_sa = get_rxsa_from_nl(genl_info_net(info), attrs, tb_rxsc, tb_sa,
2430 &dev, &secy, &rx_sc, &assoc_num);
2431 if (IS_ERR(rx_sa)) {
2433 return PTR_ERR(rx_sa);
2436 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2439 pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN;
2440 if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) {
2441 pr_notice("macsec: nl: upd_rxsa: bad pn length: %d != %d\n",
2442 nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len);
2447 spin_lock_bh(&rx_sa->lock);
2448 prev_pn = rx_sa->next_pn_halves;
2449 rx_sa->next_pn = nla_get_u64(tb_sa[MACSEC_SA_ATTR_PN]);
2450 spin_unlock_bh(&rx_sa->lock);
2453 was_active = rx_sa->active;
2454 if (tb_sa[MACSEC_SA_ATTR_ACTIVE])
2455 rx_sa->active = nla_get_u8(tb_sa[MACSEC_SA_ATTR_ACTIVE]);
2457 /* If h/w offloading is available, propagate to the device */
2458 if (macsec_is_offloaded(netdev_priv(dev))) {
2459 const struct macsec_ops *ops;
2460 struct macsec_context ctx;
2462 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2468 ctx.sa.assoc_num = assoc_num;
2469 ctx.sa.rx_sa = rx_sa;
2472 ret = macsec_offload(ops->mdo_upd_rxsa, &ctx);
2481 if (tb_sa[MACSEC_SA_ATTR_PN]) {
2482 spin_lock_bh(&rx_sa->lock);
2483 rx_sa->next_pn_halves = prev_pn;
2484 spin_unlock_bh(&rx_sa->lock);
2486 rx_sa->active = was_active;
2491 static int macsec_upd_rxsc(struct sk_buff *skb, struct genl_info *info)
2493 struct nlattr **attrs = info->attrs;
2494 struct net_device *dev;
2495 struct macsec_secy *secy;
2496 struct macsec_rx_sc *rx_sc;
2497 struct nlattr *tb_rxsc[MACSEC_RXSC_ATTR_MAX + 1];
2498 unsigned int prev_n_rx_sc;
2502 if (!attrs[MACSEC_ATTR_IFINDEX])
2505 if (parse_rxsc_config(attrs, tb_rxsc))
2508 if (!validate_add_rxsc(tb_rxsc))
2512 rx_sc = get_rxsc_from_nl(genl_info_net(info), attrs, tb_rxsc, &dev, &secy);
2513 if (IS_ERR(rx_sc)) {
2515 return PTR_ERR(rx_sc);
2518 was_active = rx_sc->active;
2519 prev_n_rx_sc = secy->n_rx_sc;
2520 if (tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]) {
2521 bool new = !!nla_get_u8(tb_rxsc[MACSEC_RXSC_ATTR_ACTIVE]);
2523 if (rx_sc->active != new)
2524 secy->n_rx_sc += new ? 1 : -1;
2526 rx_sc->active = new;
2529 /* If h/w offloading is available, propagate to the device */
2530 if (macsec_is_offloaded(netdev_priv(dev))) {
2531 const struct macsec_ops *ops;
2532 struct macsec_context ctx;
2534 ops = macsec_get_ops(netdev_priv(dev), &ctx);
2543 ret = macsec_offload(ops->mdo_upd_rxsc, &ctx);
2553 secy->n_rx_sc = prev_n_rx_sc;
2554 rx_sc->active = was_active;
2559 static bool macsec_is_configured(struct macsec_dev *macsec)
2561 struct macsec_secy *secy = &macsec->secy;
2562 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
2565 if (secy->n_rx_sc > 0)
2568 for (i = 0; i < MACSEC_NUM_AN; i++)
2575 static int macsec_upd_offload(struct sk_buff *skb, struct genl_info *info)
2577 struct nlattr *tb_offload[MACSEC_OFFLOAD_ATTR_MAX + 1];
2578 enum macsec_offload offload, prev_offload;
2579 int (*func)(struct macsec_context *ctx);
2580 struct nlattr **attrs = info->attrs;
2581 struct net_device *dev;
2582 const struct macsec_ops *ops;
2583 struct macsec_context ctx;
2584 struct macsec_dev *macsec;
2587 if (!attrs[MACSEC_ATTR_IFINDEX])
2590 if (!attrs[MACSEC_ATTR_OFFLOAD])
2593 if (nla_parse_nested_deprecated(tb_offload, MACSEC_OFFLOAD_ATTR_MAX,
2594 attrs[MACSEC_ATTR_OFFLOAD],
2595 macsec_genl_offload_policy, NULL))
2598 dev = get_dev_from_nl(genl_info_net(info), attrs);
2600 return PTR_ERR(dev);
2601 macsec = macsec_priv(dev);
2603 if (!tb_offload[MACSEC_OFFLOAD_ATTR_TYPE])
2606 offload = nla_get_u8(tb_offload[MACSEC_OFFLOAD_ATTR_TYPE]);
2607 if (macsec->offload == offload)
2610 /* Check if the offloading mode is supported by the underlying layers */
2611 if (offload != MACSEC_OFFLOAD_OFF &&
2612 !macsec_check_offload(offload, macsec))
2615 /* Check if the net device is busy. */
2616 if (netif_running(dev))
2621 prev_offload = macsec->offload;
2622 macsec->offload = offload;
2624 /* Check if the device already has rules configured: we do not support
2627 if (macsec_is_configured(macsec)) {
2632 ops = __macsec_get_ops(offload == MACSEC_OFFLOAD_OFF ? prev_offload : offload,
2639 if (prev_offload == MACSEC_OFFLOAD_OFF)
2640 func = ops->mdo_add_secy;
2642 func = ops->mdo_del_secy;
2644 ctx.secy = &macsec->secy;
2645 ret = macsec_offload(func, &ctx);
2649 /* Force features update, since they are different for SW MACSec and
2650 * HW offloading cases.
2652 netdev_update_features(dev);
2658 macsec->offload = prev_offload;
2664 static void get_tx_sa_stats(struct net_device *dev, int an,
2665 struct macsec_tx_sa *tx_sa,
2666 struct macsec_tx_sa_stats *sum)
2668 struct macsec_dev *macsec = macsec_priv(dev);
2671 /* If h/w offloading is available, propagate to the device */
2672 if (macsec_is_offloaded(macsec)) {
2673 const struct macsec_ops *ops;
2674 struct macsec_context ctx;
2676 ops = macsec_get_ops(macsec, &ctx);
2678 ctx.sa.assoc_num = an;
2679 ctx.sa.tx_sa = tx_sa;
2680 ctx.stats.tx_sa_stats = sum;
2681 ctx.secy = &macsec_priv(dev)->secy;
2682 macsec_offload(ops->mdo_get_tx_sa_stats, &ctx);
2687 for_each_possible_cpu(cpu) {
2688 const struct macsec_tx_sa_stats *stats =
2689 per_cpu_ptr(tx_sa->stats, cpu);
2691 sum->OutPktsProtected += stats->OutPktsProtected;
2692 sum->OutPktsEncrypted += stats->OutPktsEncrypted;
2696 static int copy_tx_sa_stats(struct sk_buff *skb, struct macsec_tx_sa_stats *sum)
2698 if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_PROTECTED,
2699 sum->OutPktsProtected) ||
2700 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_OUT_PKTS_ENCRYPTED,
2701 sum->OutPktsEncrypted))
2707 static void get_rx_sa_stats(struct net_device *dev,
2708 struct macsec_rx_sc *rx_sc, int an,
2709 struct macsec_rx_sa *rx_sa,
2710 struct macsec_rx_sa_stats *sum)
2712 struct macsec_dev *macsec = macsec_priv(dev);
2715 /* If h/w offloading is available, propagate to the device */
2716 if (macsec_is_offloaded(macsec)) {
2717 const struct macsec_ops *ops;
2718 struct macsec_context ctx;
2720 ops = macsec_get_ops(macsec, &ctx);
2722 ctx.sa.assoc_num = an;
2723 ctx.sa.rx_sa = rx_sa;
2724 ctx.stats.rx_sa_stats = sum;
2725 ctx.secy = &macsec_priv(dev)->secy;
2727 macsec_offload(ops->mdo_get_rx_sa_stats, &ctx);
2732 for_each_possible_cpu(cpu) {
2733 const struct macsec_rx_sa_stats *stats =
2734 per_cpu_ptr(rx_sa->stats, cpu);
2736 sum->InPktsOK += stats->InPktsOK;
2737 sum->InPktsInvalid += stats->InPktsInvalid;
2738 sum->InPktsNotValid += stats->InPktsNotValid;
2739 sum->InPktsNotUsingSA += stats->InPktsNotUsingSA;
2740 sum->InPktsUnusedSA += stats->InPktsUnusedSA;
2744 static int copy_rx_sa_stats(struct sk_buff *skb,
2745 struct macsec_rx_sa_stats *sum)
2747 if (nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_OK, sum->InPktsOK) ||
2748 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_INVALID,
2749 sum->InPktsInvalid) ||
2750 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_VALID,
2751 sum->InPktsNotValid) ||
2752 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_NOT_USING_SA,
2753 sum->InPktsNotUsingSA) ||
2754 nla_put_u32(skb, MACSEC_SA_STATS_ATTR_IN_PKTS_UNUSED_SA,
2755 sum->InPktsUnusedSA))
2761 static void get_rx_sc_stats(struct net_device *dev,
2762 struct macsec_rx_sc *rx_sc,
2763 struct macsec_rx_sc_stats *sum)
2765 struct macsec_dev *macsec = macsec_priv(dev);
2768 /* If h/w offloading is available, propagate to the device */
2769 if (macsec_is_offloaded(macsec)) {
2770 const struct macsec_ops *ops;
2771 struct macsec_context ctx;
2773 ops = macsec_get_ops(macsec, &ctx);
2775 ctx.stats.rx_sc_stats = sum;
2776 ctx.secy = &macsec_priv(dev)->secy;
2778 macsec_offload(ops->mdo_get_rx_sc_stats, &ctx);
2783 for_each_possible_cpu(cpu) {
2784 const struct pcpu_rx_sc_stats *stats;
2785 struct macsec_rx_sc_stats tmp;
2788 stats = per_cpu_ptr(rx_sc->stats, cpu);
2790 start = u64_stats_fetch_begin_irq(&stats->syncp);
2791 memcpy(&tmp, &stats->stats, sizeof(tmp));
2792 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2794 sum->InOctetsValidated += tmp.InOctetsValidated;
2795 sum->InOctetsDecrypted += tmp.InOctetsDecrypted;
2796 sum->InPktsUnchecked += tmp.InPktsUnchecked;
2797 sum->InPktsDelayed += tmp.InPktsDelayed;
2798 sum->InPktsOK += tmp.InPktsOK;
2799 sum->InPktsInvalid += tmp.InPktsInvalid;
2800 sum->InPktsLate += tmp.InPktsLate;
2801 sum->InPktsNotValid += tmp.InPktsNotValid;
2802 sum->InPktsNotUsingSA += tmp.InPktsNotUsingSA;
2803 sum->InPktsUnusedSA += tmp.InPktsUnusedSA;
2807 static int copy_rx_sc_stats(struct sk_buff *skb, struct macsec_rx_sc_stats *sum)
2809 if (nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_VALIDATED,
2810 sum->InOctetsValidated,
2811 MACSEC_RXSC_STATS_ATTR_PAD) ||
2812 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_OCTETS_DECRYPTED,
2813 sum->InOctetsDecrypted,
2814 MACSEC_RXSC_STATS_ATTR_PAD) ||
2815 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNCHECKED,
2816 sum->InPktsUnchecked,
2817 MACSEC_RXSC_STATS_ATTR_PAD) ||
2818 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_DELAYED,
2820 MACSEC_RXSC_STATS_ATTR_PAD) ||
2821 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_OK,
2823 MACSEC_RXSC_STATS_ATTR_PAD) ||
2824 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_INVALID,
2826 MACSEC_RXSC_STATS_ATTR_PAD) ||
2827 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_LATE,
2829 MACSEC_RXSC_STATS_ATTR_PAD) ||
2830 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_VALID,
2831 sum->InPktsNotValid,
2832 MACSEC_RXSC_STATS_ATTR_PAD) ||
2833 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_NOT_USING_SA,
2834 sum->InPktsNotUsingSA,
2835 MACSEC_RXSC_STATS_ATTR_PAD) ||
2836 nla_put_u64_64bit(skb, MACSEC_RXSC_STATS_ATTR_IN_PKTS_UNUSED_SA,
2837 sum->InPktsUnusedSA,
2838 MACSEC_RXSC_STATS_ATTR_PAD))
2844 static void get_tx_sc_stats(struct net_device *dev,
2845 struct macsec_tx_sc_stats *sum)
2847 struct macsec_dev *macsec = macsec_priv(dev);
2850 /* If h/w offloading is available, propagate to the device */
2851 if (macsec_is_offloaded(macsec)) {
2852 const struct macsec_ops *ops;
2853 struct macsec_context ctx;
2855 ops = macsec_get_ops(macsec, &ctx);
2857 ctx.stats.tx_sc_stats = sum;
2858 ctx.secy = &macsec_priv(dev)->secy;
2859 macsec_offload(ops->mdo_get_tx_sc_stats, &ctx);
2864 for_each_possible_cpu(cpu) {
2865 const struct pcpu_tx_sc_stats *stats;
2866 struct macsec_tx_sc_stats tmp;
2869 stats = per_cpu_ptr(macsec_priv(dev)->secy.tx_sc.stats, cpu);
2871 start = u64_stats_fetch_begin_irq(&stats->syncp);
2872 memcpy(&tmp, &stats->stats, sizeof(tmp));
2873 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2875 sum->OutPktsProtected += tmp.OutPktsProtected;
2876 sum->OutPktsEncrypted += tmp.OutPktsEncrypted;
2877 sum->OutOctetsProtected += tmp.OutOctetsProtected;
2878 sum->OutOctetsEncrypted += tmp.OutOctetsEncrypted;
2882 static int copy_tx_sc_stats(struct sk_buff *skb, struct macsec_tx_sc_stats *sum)
2884 if (nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_PROTECTED,
2885 sum->OutPktsProtected,
2886 MACSEC_TXSC_STATS_ATTR_PAD) ||
2887 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_PKTS_ENCRYPTED,
2888 sum->OutPktsEncrypted,
2889 MACSEC_TXSC_STATS_ATTR_PAD) ||
2890 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_PROTECTED,
2891 sum->OutOctetsProtected,
2892 MACSEC_TXSC_STATS_ATTR_PAD) ||
2893 nla_put_u64_64bit(skb, MACSEC_TXSC_STATS_ATTR_OUT_OCTETS_ENCRYPTED,
2894 sum->OutOctetsEncrypted,
2895 MACSEC_TXSC_STATS_ATTR_PAD))
2901 static void get_secy_stats(struct net_device *dev, struct macsec_dev_stats *sum)
2903 struct macsec_dev *macsec = macsec_priv(dev);
2906 /* If h/w offloading is available, propagate to the device */
2907 if (macsec_is_offloaded(macsec)) {
2908 const struct macsec_ops *ops;
2909 struct macsec_context ctx;
2911 ops = macsec_get_ops(macsec, &ctx);
2913 ctx.stats.dev_stats = sum;
2914 ctx.secy = &macsec_priv(dev)->secy;
2915 macsec_offload(ops->mdo_get_dev_stats, &ctx);
2920 for_each_possible_cpu(cpu) {
2921 const struct pcpu_secy_stats *stats;
2922 struct macsec_dev_stats tmp;
2925 stats = per_cpu_ptr(macsec_priv(dev)->stats, cpu);
2927 start = u64_stats_fetch_begin_irq(&stats->syncp);
2928 memcpy(&tmp, &stats->stats, sizeof(tmp));
2929 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
2931 sum->OutPktsUntagged += tmp.OutPktsUntagged;
2932 sum->InPktsUntagged += tmp.InPktsUntagged;
2933 sum->OutPktsTooLong += tmp.OutPktsTooLong;
2934 sum->InPktsNoTag += tmp.InPktsNoTag;
2935 sum->InPktsBadTag += tmp.InPktsBadTag;
2936 sum->InPktsUnknownSCI += tmp.InPktsUnknownSCI;
2937 sum->InPktsNoSCI += tmp.InPktsNoSCI;
2938 sum->InPktsOverrun += tmp.InPktsOverrun;
2942 static int copy_secy_stats(struct sk_buff *skb, struct macsec_dev_stats *sum)
2944 if (nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_UNTAGGED,
2945 sum->OutPktsUntagged,
2946 MACSEC_SECY_STATS_ATTR_PAD) ||
2947 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNTAGGED,
2948 sum->InPktsUntagged,
2949 MACSEC_SECY_STATS_ATTR_PAD) ||
2950 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_OUT_PKTS_TOO_LONG,
2951 sum->OutPktsTooLong,
2952 MACSEC_SECY_STATS_ATTR_PAD) ||
2953 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_TAG,
2955 MACSEC_SECY_STATS_ATTR_PAD) ||
2956 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_BAD_TAG,
2958 MACSEC_SECY_STATS_ATTR_PAD) ||
2959 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_UNKNOWN_SCI,
2960 sum->InPktsUnknownSCI,
2961 MACSEC_SECY_STATS_ATTR_PAD) ||
2962 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_NO_SCI,
2964 MACSEC_SECY_STATS_ATTR_PAD) ||
2965 nla_put_u64_64bit(skb, MACSEC_SECY_STATS_ATTR_IN_PKTS_OVERRUN,
2967 MACSEC_SECY_STATS_ATTR_PAD))
2973 static int nla_put_secy(struct macsec_secy *secy, struct sk_buff *skb)
2975 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
2976 struct nlattr *secy_nest = nla_nest_start_noflag(skb,
2983 switch (secy->key_len) {
2984 case MACSEC_GCM_AES_128_SAK_LEN:
2985 csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_128 : MACSEC_DEFAULT_CIPHER_ID;
2987 case MACSEC_GCM_AES_256_SAK_LEN:
2988 csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_256 : MACSEC_CIPHER_ID_GCM_AES_256;
2994 if (nla_put_sci(skb, MACSEC_SECY_ATTR_SCI, secy->sci,
2995 MACSEC_SECY_ATTR_PAD) ||
2996 nla_put_u64_64bit(skb, MACSEC_SECY_ATTR_CIPHER_SUITE,
2997 csid, MACSEC_SECY_ATTR_PAD) ||
2998 nla_put_u8(skb, MACSEC_SECY_ATTR_ICV_LEN, secy->icv_len) ||
2999 nla_put_u8(skb, MACSEC_SECY_ATTR_OPER, secy->operational) ||
3000 nla_put_u8(skb, MACSEC_SECY_ATTR_PROTECT, secy->protect_frames) ||
3001 nla_put_u8(skb, MACSEC_SECY_ATTR_REPLAY, secy->replay_protect) ||
3002 nla_put_u8(skb, MACSEC_SECY_ATTR_VALIDATE, secy->validate_frames) ||
3003 nla_put_u8(skb, MACSEC_SECY_ATTR_ENCRYPT, tx_sc->encrypt) ||
3004 nla_put_u8(skb, MACSEC_SECY_ATTR_INC_SCI, tx_sc->send_sci) ||
3005 nla_put_u8(skb, MACSEC_SECY_ATTR_ES, tx_sc->end_station) ||
3006 nla_put_u8(skb, MACSEC_SECY_ATTR_SCB, tx_sc->scb) ||
3007 nla_put_u8(skb, MACSEC_SECY_ATTR_ENCODING_SA, tx_sc->encoding_sa))
3010 if (secy->replay_protect) {
3011 if (nla_put_u32(skb, MACSEC_SECY_ATTR_WINDOW, secy->replay_window))
3015 nla_nest_end(skb, secy_nest);
3019 nla_nest_cancel(skb, secy_nest);
3023 static noinline_for_stack int
3024 dump_secy(struct macsec_secy *secy, struct net_device *dev,
3025 struct sk_buff *skb, struct netlink_callback *cb)
3027 struct macsec_tx_sc_stats tx_sc_stats = {0, };
3028 struct macsec_tx_sa_stats tx_sa_stats = {0, };
3029 struct macsec_rx_sc_stats rx_sc_stats = {0, };
3030 struct macsec_rx_sa_stats rx_sa_stats = {0, };
3031 struct macsec_dev *macsec = netdev_priv(dev);
3032 struct macsec_dev_stats dev_stats = {0, };
3033 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
3034 struct nlattr *txsa_list, *rxsc_list;
3035 struct macsec_rx_sc *rx_sc;
3036 struct nlattr *attr;
3040 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
3041 &macsec_fam, NLM_F_MULTI, MACSEC_CMD_GET_TXSC);
3045 genl_dump_check_consistent(cb, hdr);
3047 if (nla_put_u32(skb, MACSEC_ATTR_IFINDEX, dev->ifindex))
3048 goto nla_put_failure;
3050 attr = nla_nest_start_noflag(skb, MACSEC_ATTR_OFFLOAD);
3052 goto nla_put_failure;
3053 if (nla_put_u8(skb, MACSEC_OFFLOAD_ATTR_TYPE, macsec->offload))
3054 goto nla_put_failure;
3055 nla_nest_end(skb, attr);
3057 if (nla_put_secy(secy, skb))
3058 goto nla_put_failure;
3060 attr = nla_nest_start_noflag(skb, MACSEC_ATTR_TXSC_STATS);
3062 goto nla_put_failure;
3064 get_tx_sc_stats(dev, &tx_sc_stats);
3065 if (copy_tx_sc_stats(skb, &tx_sc_stats)) {
3066 nla_nest_cancel(skb, attr);
3067 goto nla_put_failure;
3069 nla_nest_end(skb, attr);
3071 attr = nla_nest_start_noflag(skb, MACSEC_ATTR_SECY_STATS);
3073 goto nla_put_failure;
3074 get_secy_stats(dev, &dev_stats);
3075 if (copy_secy_stats(skb, &dev_stats)) {
3076 nla_nest_cancel(skb, attr);
3077 goto nla_put_failure;
3079 nla_nest_end(skb, attr);
3081 txsa_list = nla_nest_start_noflag(skb, MACSEC_ATTR_TXSA_LIST);
3083 goto nla_put_failure;
3084 for (i = 0, j = 1; i < MACSEC_NUM_AN; i++) {
3085 struct macsec_tx_sa *tx_sa = rtnl_dereference(tx_sc->sa[i]);
3086 struct nlattr *txsa_nest;
3093 txsa_nest = nla_nest_start_noflag(skb, j++);
3095 nla_nest_cancel(skb, txsa_list);
3096 goto nla_put_failure;
3099 attr = nla_nest_start_noflag(skb, MACSEC_SA_ATTR_STATS);
3101 nla_nest_cancel(skb, txsa_nest);
3102 nla_nest_cancel(skb, txsa_list);
3103 goto nla_put_failure;
3105 memset(&tx_sa_stats, 0, sizeof(tx_sa_stats));
3106 get_tx_sa_stats(dev, i, tx_sa, &tx_sa_stats);
3107 if (copy_tx_sa_stats(skb, &tx_sa_stats)) {
3108 nla_nest_cancel(skb, attr);
3109 nla_nest_cancel(skb, txsa_nest);
3110 nla_nest_cancel(skb, txsa_list);
3111 goto nla_put_failure;
3113 nla_nest_end(skb, attr);
3116 pn = tx_sa->next_pn;
3117 pn_len = MACSEC_XPN_PN_LEN;
3119 pn = tx_sa->next_pn_halves.lower;
3120 pn_len = MACSEC_DEFAULT_PN_LEN;
3123 if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) ||
3124 nla_put(skb, MACSEC_SA_ATTR_PN, pn_len, &pn) ||
3125 nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, tx_sa->key.id) ||
3126 (secy->xpn && nla_put_ssci(skb, MACSEC_SA_ATTR_SSCI, tx_sa->ssci)) ||
3127 nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, tx_sa->active)) {
3128 nla_nest_cancel(skb, txsa_nest);
3129 nla_nest_cancel(skb, txsa_list);
3130 goto nla_put_failure;
3133 nla_nest_end(skb, txsa_nest);
3135 nla_nest_end(skb, txsa_list);
3137 rxsc_list = nla_nest_start_noflag(skb, MACSEC_ATTR_RXSC_LIST);
3139 goto nla_put_failure;
3142 for_each_rxsc_rtnl(secy, rx_sc) {
3144 struct nlattr *rxsa_list;
3145 struct nlattr *rxsc_nest = nla_nest_start_noflag(skb, j++);
3148 nla_nest_cancel(skb, rxsc_list);
3149 goto nla_put_failure;
3152 if (nla_put_u8(skb, MACSEC_RXSC_ATTR_ACTIVE, rx_sc->active) ||
3153 nla_put_sci(skb, MACSEC_RXSC_ATTR_SCI, rx_sc->sci,
3154 MACSEC_RXSC_ATTR_PAD)) {
3155 nla_nest_cancel(skb, rxsc_nest);
3156 nla_nest_cancel(skb, rxsc_list);
3157 goto nla_put_failure;
3160 attr = nla_nest_start_noflag(skb, MACSEC_RXSC_ATTR_STATS);
3162 nla_nest_cancel(skb, rxsc_nest);
3163 nla_nest_cancel(skb, rxsc_list);
3164 goto nla_put_failure;
3166 memset(&rx_sc_stats, 0, sizeof(rx_sc_stats));
3167 get_rx_sc_stats(dev, rx_sc, &rx_sc_stats);
3168 if (copy_rx_sc_stats(skb, &rx_sc_stats)) {
3169 nla_nest_cancel(skb, attr);
3170 nla_nest_cancel(skb, rxsc_nest);
3171 nla_nest_cancel(skb, rxsc_list);
3172 goto nla_put_failure;
3174 nla_nest_end(skb, attr);
3176 rxsa_list = nla_nest_start_noflag(skb,
3177 MACSEC_RXSC_ATTR_SA_LIST);
3179 nla_nest_cancel(skb, rxsc_nest);
3180 nla_nest_cancel(skb, rxsc_list);
3181 goto nla_put_failure;
3184 for (i = 0, k = 1; i < MACSEC_NUM_AN; i++) {
3185 struct macsec_rx_sa *rx_sa = rtnl_dereference(rx_sc->sa[i]);
3186 struct nlattr *rxsa_nest;
3193 rxsa_nest = nla_nest_start_noflag(skb, k++);
3195 nla_nest_cancel(skb, rxsa_list);
3196 nla_nest_cancel(skb, rxsc_nest);
3197 nla_nest_cancel(skb, rxsc_list);
3198 goto nla_put_failure;
3201 attr = nla_nest_start_noflag(skb,
3202 MACSEC_SA_ATTR_STATS);
3204 nla_nest_cancel(skb, rxsa_list);
3205 nla_nest_cancel(skb, rxsc_nest);
3206 nla_nest_cancel(skb, rxsc_list);
3207 goto nla_put_failure;
3209 memset(&rx_sa_stats, 0, sizeof(rx_sa_stats));
3210 get_rx_sa_stats(dev, rx_sc, i, rx_sa, &rx_sa_stats);
3211 if (copy_rx_sa_stats(skb, &rx_sa_stats)) {
3212 nla_nest_cancel(skb, attr);
3213 nla_nest_cancel(skb, rxsa_list);
3214 nla_nest_cancel(skb, rxsc_nest);
3215 nla_nest_cancel(skb, rxsc_list);
3216 goto nla_put_failure;
3218 nla_nest_end(skb, attr);
3221 pn = rx_sa->next_pn;
3222 pn_len = MACSEC_XPN_PN_LEN;
3224 pn = rx_sa->next_pn_halves.lower;
3225 pn_len = MACSEC_DEFAULT_PN_LEN;
3228 if (nla_put_u8(skb, MACSEC_SA_ATTR_AN, i) ||
3229 nla_put(skb, MACSEC_SA_ATTR_PN, pn_len, &pn) ||
3230 nla_put(skb, MACSEC_SA_ATTR_KEYID, MACSEC_KEYID_LEN, rx_sa->key.id) ||
3231 (secy->xpn && nla_put_ssci(skb, MACSEC_SA_ATTR_SSCI, rx_sa->ssci)) ||
3232 nla_put_u8(skb, MACSEC_SA_ATTR_ACTIVE, rx_sa->active)) {
3233 nla_nest_cancel(skb, rxsa_nest);
3234 nla_nest_cancel(skb, rxsc_nest);
3235 nla_nest_cancel(skb, rxsc_list);
3236 goto nla_put_failure;
3238 nla_nest_end(skb, rxsa_nest);
3241 nla_nest_end(skb, rxsa_list);
3242 nla_nest_end(skb, rxsc_nest);
3245 nla_nest_end(skb, rxsc_list);
3247 genlmsg_end(skb, hdr);
3252 genlmsg_cancel(skb, hdr);
3256 static int macsec_generation = 1; /* protected by RTNL */
3258 static int macsec_dump_txsc(struct sk_buff *skb, struct netlink_callback *cb)
3260 struct net *net = sock_net(skb->sk);
3261 struct net_device *dev;
3264 dev_idx = cb->args[0];
3269 cb->seq = macsec_generation;
3271 for_each_netdev(net, dev) {
3272 struct macsec_secy *secy;
3277 if (!netif_is_macsec(dev))
3280 secy = &macsec_priv(dev)->secy;
3281 if (dump_secy(secy, dev, skb, cb) < 0)
3293 static const struct genl_small_ops macsec_genl_ops[] = {
3295 .cmd = MACSEC_CMD_GET_TXSC,
3296 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3297 .dumpit = macsec_dump_txsc,
3300 .cmd = MACSEC_CMD_ADD_RXSC,
3301 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3302 .doit = macsec_add_rxsc,
3303 .flags = GENL_ADMIN_PERM,
3306 .cmd = MACSEC_CMD_DEL_RXSC,
3307 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3308 .doit = macsec_del_rxsc,
3309 .flags = GENL_ADMIN_PERM,
3312 .cmd = MACSEC_CMD_UPD_RXSC,
3313 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3314 .doit = macsec_upd_rxsc,
3315 .flags = GENL_ADMIN_PERM,
3318 .cmd = MACSEC_CMD_ADD_TXSA,
3319 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3320 .doit = macsec_add_txsa,
3321 .flags = GENL_ADMIN_PERM,
3324 .cmd = MACSEC_CMD_DEL_TXSA,
3325 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3326 .doit = macsec_del_txsa,
3327 .flags = GENL_ADMIN_PERM,
3330 .cmd = MACSEC_CMD_UPD_TXSA,
3331 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3332 .doit = macsec_upd_txsa,
3333 .flags = GENL_ADMIN_PERM,
3336 .cmd = MACSEC_CMD_ADD_RXSA,
3337 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3338 .doit = macsec_add_rxsa,
3339 .flags = GENL_ADMIN_PERM,
3342 .cmd = MACSEC_CMD_DEL_RXSA,
3343 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3344 .doit = macsec_del_rxsa,
3345 .flags = GENL_ADMIN_PERM,
3348 .cmd = MACSEC_CMD_UPD_RXSA,
3349 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3350 .doit = macsec_upd_rxsa,
3351 .flags = GENL_ADMIN_PERM,
3354 .cmd = MACSEC_CMD_UPD_OFFLOAD,
3355 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3356 .doit = macsec_upd_offload,
3357 .flags = GENL_ADMIN_PERM,
3361 static struct genl_family macsec_fam __ro_after_init = {
3362 .name = MACSEC_GENL_NAME,
3364 .version = MACSEC_GENL_VERSION,
3365 .maxattr = MACSEC_ATTR_MAX,
3366 .policy = macsec_genl_policy,
3368 .module = THIS_MODULE,
3369 .small_ops = macsec_genl_ops,
3370 .n_small_ops = ARRAY_SIZE(macsec_genl_ops),
3373 static netdev_tx_t macsec_start_xmit(struct sk_buff *skb,
3374 struct net_device *dev)
3376 struct macsec_dev *macsec = netdev_priv(dev);
3377 struct macsec_secy *secy = &macsec->secy;
3378 struct pcpu_secy_stats *secy_stats;
3381 if (macsec_is_offloaded(netdev_priv(dev))) {
3382 skb->dev = macsec->real_dev;
3383 return dev_queue_xmit(skb);
3387 if (!secy->protect_frames) {
3388 secy_stats = this_cpu_ptr(macsec->stats);
3389 u64_stats_update_begin(&secy_stats->syncp);
3390 secy_stats->stats.OutPktsUntagged++;
3391 u64_stats_update_end(&secy_stats->syncp);
3392 skb->dev = macsec->real_dev;
3394 ret = dev_queue_xmit(skb);
3395 count_tx(dev, ret, len);
3399 if (!secy->operational) {
3401 dev->stats.tx_dropped++;
3402 return NETDEV_TX_OK;
3405 skb = macsec_encrypt(skb, dev);
3407 if (PTR_ERR(skb) != -EINPROGRESS)
3408 dev->stats.tx_dropped++;
3409 return NETDEV_TX_OK;
3412 macsec_count_tx(skb, &macsec->secy.tx_sc, macsec_skb_cb(skb)->tx_sa);
3414 macsec_encrypt_finish(skb, dev);
3416 ret = dev_queue_xmit(skb);
3417 count_tx(dev, ret, len);
3421 #define SW_MACSEC_FEATURES \
3422 (NETIF_F_SG | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST)
3424 /* If h/w offloading is enabled, use real device features save for
3425 * VLAN_FEATURES - they require additional ops
3426 * HW_MACSEC - no reason to report it
3428 #define REAL_DEV_FEATURES(dev) \
3429 ((dev)->features & ~(NETIF_F_VLAN_FEATURES | NETIF_F_HW_MACSEC))
3431 static int macsec_dev_init(struct net_device *dev)
3433 struct macsec_dev *macsec = macsec_priv(dev);
3434 struct net_device *real_dev = macsec->real_dev;
3437 dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
3441 err = gro_cells_init(&macsec->gro_cells, dev);
3443 free_percpu(dev->tstats);
3447 if (macsec_is_offloaded(macsec)) {
3448 dev->features = REAL_DEV_FEATURES(real_dev);
3450 dev->features = real_dev->features & SW_MACSEC_FEATURES;
3451 dev->features |= NETIF_F_LLTX | NETIF_F_GSO_SOFTWARE;
3454 dev->needed_headroom = real_dev->needed_headroom +
3455 MACSEC_NEEDED_HEADROOM;
3456 dev->needed_tailroom = real_dev->needed_tailroom +
3457 MACSEC_NEEDED_TAILROOM;
3459 if (is_zero_ether_addr(dev->dev_addr))
3460 eth_hw_addr_inherit(dev, real_dev);
3461 if (is_zero_ether_addr(dev->broadcast))
3462 memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len);
3464 /* Get macsec's reference to real_dev */
3465 dev_hold_track(real_dev, &macsec->dev_tracker, GFP_KERNEL);
3470 static void macsec_dev_uninit(struct net_device *dev)
3472 struct macsec_dev *macsec = macsec_priv(dev);
3474 gro_cells_destroy(&macsec->gro_cells);
3475 free_percpu(dev->tstats);
3478 static netdev_features_t macsec_fix_features(struct net_device *dev,
3479 netdev_features_t features)
3481 struct macsec_dev *macsec = macsec_priv(dev);
3482 struct net_device *real_dev = macsec->real_dev;
3484 if (macsec_is_offloaded(macsec))
3485 return REAL_DEV_FEATURES(real_dev);
3487 features &= (real_dev->features & SW_MACSEC_FEATURES) |
3488 NETIF_F_GSO_SOFTWARE | NETIF_F_SOFT_FEATURES;
3489 features |= NETIF_F_LLTX;
3494 static int macsec_dev_open(struct net_device *dev)
3496 struct macsec_dev *macsec = macsec_priv(dev);
3497 struct net_device *real_dev = macsec->real_dev;
3500 err = dev_uc_add(real_dev, dev->dev_addr);
3504 if (dev->flags & IFF_ALLMULTI) {
3505 err = dev_set_allmulti(real_dev, 1);
3510 if (dev->flags & IFF_PROMISC) {
3511 err = dev_set_promiscuity(real_dev, 1);
3513 goto clear_allmulti;
3516 /* If h/w offloading is available, propagate to the device */
3517 if (macsec_is_offloaded(macsec)) {
3518 const struct macsec_ops *ops;
3519 struct macsec_context ctx;
3521 ops = macsec_get_ops(netdev_priv(dev), &ctx);
3524 goto clear_allmulti;
3527 ctx.secy = &macsec->secy;
3528 err = macsec_offload(ops->mdo_dev_open, &ctx);
3530 goto clear_allmulti;
3533 if (netif_carrier_ok(real_dev))
3534 netif_carrier_on(dev);
3538 if (dev->flags & IFF_ALLMULTI)
3539 dev_set_allmulti(real_dev, -1);
3541 dev_uc_del(real_dev, dev->dev_addr);
3542 netif_carrier_off(dev);
3546 static int macsec_dev_stop(struct net_device *dev)
3548 struct macsec_dev *macsec = macsec_priv(dev);
3549 struct net_device *real_dev = macsec->real_dev;
3551 netif_carrier_off(dev);
3553 /* If h/w offloading is available, propagate to the device */
3554 if (macsec_is_offloaded(macsec)) {
3555 const struct macsec_ops *ops;
3556 struct macsec_context ctx;
3558 ops = macsec_get_ops(macsec, &ctx);
3560 ctx.secy = &macsec->secy;
3561 macsec_offload(ops->mdo_dev_stop, &ctx);
3565 dev_mc_unsync(real_dev, dev);
3566 dev_uc_unsync(real_dev, dev);
3568 if (dev->flags & IFF_ALLMULTI)
3569 dev_set_allmulti(real_dev, -1);
3571 if (dev->flags & IFF_PROMISC)
3572 dev_set_promiscuity(real_dev, -1);
3574 dev_uc_del(real_dev, dev->dev_addr);
3579 static void macsec_dev_change_rx_flags(struct net_device *dev, int change)
3581 struct net_device *real_dev = macsec_priv(dev)->real_dev;
3583 if (!(dev->flags & IFF_UP))
3586 if (change & IFF_ALLMULTI)
3587 dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1);
3589 if (change & IFF_PROMISC)
3590 dev_set_promiscuity(real_dev,
3591 dev->flags & IFF_PROMISC ? 1 : -1);
3594 static void macsec_dev_set_rx_mode(struct net_device *dev)
3596 struct net_device *real_dev = macsec_priv(dev)->real_dev;
3598 dev_mc_sync(real_dev, dev);
3599 dev_uc_sync(real_dev, dev);
3602 static int macsec_set_mac_address(struct net_device *dev, void *p)
3604 struct macsec_dev *macsec = macsec_priv(dev);
3605 struct net_device *real_dev = macsec->real_dev;
3606 struct sockaddr *addr = p;
3609 if (!is_valid_ether_addr(addr->sa_data))
3610 return -EADDRNOTAVAIL;
3612 if (!(dev->flags & IFF_UP))
3615 err = dev_uc_add(real_dev, addr->sa_data);
3619 dev_uc_del(real_dev, dev->dev_addr);
3622 eth_hw_addr_set(dev, addr->sa_data);
3623 macsec->secy.sci = dev_to_sci(dev, MACSEC_PORT_ES);
3625 /* If h/w offloading is available, propagate to the device */
3626 if (macsec_is_offloaded(macsec)) {
3627 const struct macsec_ops *ops;
3628 struct macsec_context ctx;
3630 ops = macsec_get_ops(macsec, &ctx);
3632 ctx.secy = &macsec->secy;
3633 macsec_offload(ops->mdo_upd_secy, &ctx);
3640 static int macsec_change_mtu(struct net_device *dev, int new_mtu)
3642 struct macsec_dev *macsec = macsec_priv(dev);
3643 unsigned int extra = macsec->secy.icv_len + macsec_extra_len(true);
3645 if (macsec->real_dev->mtu - extra < new_mtu)
3653 static void macsec_get_stats64(struct net_device *dev,
3654 struct rtnl_link_stats64 *s)
3659 dev_fetch_sw_netstats(s, dev->tstats);
3661 s->rx_dropped = dev->stats.rx_dropped;
3662 s->tx_dropped = dev->stats.tx_dropped;
3665 static int macsec_get_iflink(const struct net_device *dev)
3667 return macsec_priv(dev)->real_dev->ifindex;
3670 static const struct net_device_ops macsec_netdev_ops = {
3671 .ndo_init = macsec_dev_init,
3672 .ndo_uninit = macsec_dev_uninit,
3673 .ndo_open = macsec_dev_open,
3674 .ndo_stop = macsec_dev_stop,
3675 .ndo_fix_features = macsec_fix_features,
3676 .ndo_change_mtu = macsec_change_mtu,
3677 .ndo_set_rx_mode = macsec_dev_set_rx_mode,
3678 .ndo_change_rx_flags = macsec_dev_change_rx_flags,
3679 .ndo_set_mac_address = macsec_set_mac_address,
3680 .ndo_start_xmit = macsec_start_xmit,
3681 .ndo_get_stats64 = macsec_get_stats64,
3682 .ndo_get_iflink = macsec_get_iflink,
3685 static const struct device_type macsec_type = {
3689 static const struct nla_policy macsec_rtnl_policy[IFLA_MACSEC_MAX + 1] = {
3690 [IFLA_MACSEC_SCI] = { .type = NLA_U64 },
3691 [IFLA_MACSEC_PORT] = { .type = NLA_U16 },
3692 [IFLA_MACSEC_ICV_LEN] = { .type = NLA_U8 },
3693 [IFLA_MACSEC_CIPHER_SUITE] = { .type = NLA_U64 },
3694 [IFLA_MACSEC_WINDOW] = { .type = NLA_U32 },
3695 [IFLA_MACSEC_ENCODING_SA] = { .type = NLA_U8 },
3696 [IFLA_MACSEC_ENCRYPT] = { .type = NLA_U8 },
3697 [IFLA_MACSEC_PROTECT] = { .type = NLA_U8 },
3698 [IFLA_MACSEC_INC_SCI] = { .type = NLA_U8 },
3699 [IFLA_MACSEC_ES] = { .type = NLA_U8 },
3700 [IFLA_MACSEC_SCB] = { .type = NLA_U8 },
3701 [IFLA_MACSEC_REPLAY_PROTECT] = { .type = NLA_U8 },
3702 [IFLA_MACSEC_VALIDATION] = { .type = NLA_U8 },
3705 static void macsec_free_netdev(struct net_device *dev)
3707 struct macsec_dev *macsec = macsec_priv(dev);
3709 free_percpu(macsec->stats);
3710 free_percpu(macsec->secy.tx_sc.stats);
3712 /* Get rid of the macsec's reference to real_dev */
3713 dev_put_track(macsec->real_dev, &macsec->dev_tracker);
3716 static void macsec_setup(struct net_device *dev)
3720 dev->max_mtu = ETH_MAX_MTU;
3721 dev->priv_flags |= IFF_NO_QUEUE;
3722 dev->netdev_ops = &macsec_netdev_ops;
3723 dev->needs_free_netdev = true;
3724 dev->priv_destructor = macsec_free_netdev;
3725 SET_NETDEV_DEVTYPE(dev, &macsec_type);
3727 eth_zero_addr(dev->broadcast);
3730 static int macsec_changelink_common(struct net_device *dev,
3731 struct nlattr *data[])
3733 struct macsec_secy *secy;
3734 struct macsec_tx_sc *tx_sc;
3736 secy = &macsec_priv(dev)->secy;
3737 tx_sc = &secy->tx_sc;
3739 if (data[IFLA_MACSEC_ENCODING_SA]) {
3740 struct macsec_tx_sa *tx_sa;
3742 tx_sc->encoding_sa = nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]);
3743 tx_sa = rtnl_dereference(tx_sc->sa[tx_sc->encoding_sa]);
3745 secy->operational = tx_sa && tx_sa->active;
3748 if (data[IFLA_MACSEC_WINDOW])
3749 secy->replay_window = nla_get_u32(data[IFLA_MACSEC_WINDOW]);
3751 if (data[IFLA_MACSEC_ENCRYPT])
3752 tx_sc->encrypt = !!nla_get_u8(data[IFLA_MACSEC_ENCRYPT]);
3754 if (data[IFLA_MACSEC_PROTECT])
3755 secy->protect_frames = !!nla_get_u8(data[IFLA_MACSEC_PROTECT]);
3757 if (data[IFLA_MACSEC_INC_SCI])
3758 tx_sc->send_sci = !!nla_get_u8(data[IFLA_MACSEC_INC_SCI]);
3760 if (data[IFLA_MACSEC_ES])
3761 tx_sc->end_station = !!nla_get_u8(data[IFLA_MACSEC_ES]);
3763 if (data[IFLA_MACSEC_SCB])
3764 tx_sc->scb = !!nla_get_u8(data[IFLA_MACSEC_SCB]);
3766 if (data[IFLA_MACSEC_REPLAY_PROTECT])
3767 secy->replay_protect = !!nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT]);
3769 if (data[IFLA_MACSEC_VALIDATION])
3770 secy->validate_frames = nla_get_u8(data[IFLA_MACSEC_VALIDATION]);
3772 if (data[IFLA_MACSEC_CIPHER_SUITE]) {
3773 switch (nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE])) {
3774 case MACSEC_CIPHER_ID_GCM_AES_128:
3775 case MACSEC_DEFAULT_CIPHER_ID:
3776 secy->key_len = MACSEC_GCM_AES_128_SAK_LEN;
3779 case MACSEC_CIPHER_ID_GCM_AES_256:
3780 secy->key_len = MACSEC_GCM_AES_256_SAK_LEN;
3783 case MACSEC_CIPHER_ID_GCM_AES_XPN_128:
3784 secy->key_len = MACSEC_GCM_AES_128_SAK_LEN;
3787 case MACSEC_CIPHER_ID_GCM_AES_XPN_256:
3788 secy->key_len = MACSEC_GCM_AES_256_SAK_LEN;
3799 static int macsec_changelink(struct net_device *dev, struct nlattr *tb[],
3800 struct nlattr *data[],
3801 struct netlink_ext_ack *extack)
3803 struct macsec_dev *macsec = macsec_priv(dev);
3804 struct macsec_tx_sc tx_sc;
3805 struct macsec_secy secy;
3811 if (data[IFLA_MACSEC_CIPHER_SUITE] ||
3812 data[IFLA_MACSEC_ICV_LEN] ||
3813 data[IFLA_MACSEC_SCI] ||
3814 data[IFLA_MACSEC_PORT])
3817 /* Keep a copy of unmodified secy and tx_sc, in case the offload
3818 * propagation fails, to revert macsec_changelink_common.
3820 memcpy(&secy, &macsec->secy, sizeof(secy));
3821 memcpy(&tx_sc, &macsec->secy.tx_sc, sizeof(tx_sc));
3823 ret = macsec_changelink_common(dev, data);
3827 /* If h/w offloading is available, propagate to the device */
3828 if (macsec_is_offloaded(macsec)) {
3829 const struct macsec_ops *ops;
3830 struct macsec_context ctx;
3833 ops = macsec_get_ops(netdev_priv(dev), &ctx);
3839 ctx.secy = &macsec->secy;
3840 ret = macsec_offload(ops->mdo_upd_secy, &ctx);
3848 memcpy(&macsec->secy.tx_sc, &tx_sc, sizeof(tx_sc));
3849 memcpy(&macsec->secy, &secy, sizeof(secy));
3854 static void macsec_del_dev(struct macsec_dev *macsec)
3858 while (macsec->secy.rx_sc) {
3859 struct macsec_rx_sc *rx_sc = rtnl_dereference(macsec->secy.rx_sc);
3861 rcu_assign_pointer(macsec->secy.rx_sc, rx_sc->next);
3865 for (i = 0; i < MACSEC_NUM_AN; i++) {
3866 struct macsec_tx_sa *sa = rtnl_dereference(macsec->secy.tx_sc.sa[i]);
3869 RCU_INIT_POINTER(macsec->secy.tx_sc.sa[i], NULL);
3875 static void macsec_common_dellink(struct net_device *dev, struct list_head *head)
3877 struct macsec_dev *macsec = macsec_priv(dev);
3878 struct net_device *real_dev = macsec->real_dev;
3880 /* If h/w offloading is available, propagate to the device */
3881 if (macsec_is_offloaded(macsec)) {
3882 const struct macsec_ops *ops;
3883 struct macsec_context ctx;
3885 ops = macsec_get_ops(netdev_priv(dev), &ctx);
3887 ctx.secy = &macsec->secy;
3888 macsec_offload(ops->mdo_del_secy, &ctx);
3892 unregister_netdevice_queue(dev, head);
3893 list_del_rcu(&macsec->secys);
3894 macsec_del_dev(macsec);
3895 netdev_upper_dev_unlink(real_dev, dev);
3897 macsec_generation++;
3900 static void macsec_dellink(struct net_device *dev, struct list_head *head)
3902 struct macsec_dev *macsec = macsec_priv(dev);
3903 struct net_device *real_dev = macsec->real_dev;
3904 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
3906 macsec_common_dellink(dev, head);
3908 if (list_empty(&rxd->secys)) {
3909 netdev_rx_handler_unregister(real_dev);
3914 static int register_macsec_dev(struct net_device *real_dev,
3915 struct net_device *dev)
3917 struct macsec_dev *macsec = macsec_priv(dev);
3918 struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
3923 rxd = kmalloc(sizeof(*rxd), GFP_KERNEL);
3927 INIT_LIST_HEAD(&rxd->secys);
3929 err = netdev_rx_handler_register(real_dev, macsec_handle_frame,
3937 list_add_tail_rcu(&macsec->secys, &rxd->secys);
3941 static bool sci_exists(struct net_device *dev, sci_t sci)
3943 struct macsec_rxh_data *rxd = macsec_data_rtnl(dev);
3944 struct macsec_dev *macsec;
3946 list_for_each_entry(macsec, &rxd->secys, secys) {
3947 if (macsec->secy.sci == sci)
3954 static int macsec_add_dev(struct net_device *dev, sci_t sci, u8 icv_len)
3956 struct macsec_dev *macsec = macsec_priv(dev);
3957 struct macsec_secy *secy = &macsec->secy;
3959 macsec->stats = netdev_alloc_pcpu_stats(struct pcpu_secy_stats);
3963 secy->tx_sc.stats = netdev_alloc_pcpu_stats(struct pcpu_tx_sc_stats);
3964 if (!secy->tx_sc.stats) {
3965 free_percpu(macsec->stats);
3969 if (sci == MACSEC_UNDEF_SCI)
3970 sci = dev_to_sci(dev, MACSEC_PORT_ES);
3973 secy->operational = true;
3974 secy->key_len = DEFAULT_SAK_LEN;
3975 secy->icv_len = icv_len;
3976 secy->validate_frames = MACSEC_VALIDATE_DEFAULT;
3977 secy->protect_frames = true;
3978 secy->replay_protect = false;
3979 secy->xpn = DEFAULT_XPN;
3982 secy->tx_sc.active = true;
3983 secy->tx_sc.encoding_sa = DEFAULT_ENCODING_SA;
3984 secy->tx_sc.encrypt = DEFAULT_ENCRYPT;
3985 secy->tx_sc.send_sci = DEFAULT_SEND_SCI;
3986 secy->tx_sc.end_station = false;
3987 secy->tx_sc.scb = false;
3992 static struct lock_class_key macsec_netdev_addr_lock_key;
3994 static int macsec_newlink(struct net *net, struct net_device *dev,
3995 struct nlattr *tb[], struct nlattr *data[],
3996 struct netlink_ext_ack *extack)
3998 struct macsec_dev *macsec = macsec_priv(dev);
3999 rx_handler_func_t *rx_handler;
4000 u8 icv_len = DEFAULT_ICV_LEN;
4001 struct net_device *real_dev;
4007 real_dev = __dev_get_by_index(net, nla_get_u32(tb[IFLA_LINK]));
4010 if (real_dev->type != ARPHRD_ETHER)
4013 dev->priv_flags |= IFF_MACSEC;
4015 macsec->real_dev = real_dev;
4017 if (data && data[IFLA_MACSEC_OFFLOAD])
4018 macsec->offload = nla_get_offload(data[IFLA_MACSEC_OFFLOAD]);
4020 /* MACsec offloading is off by default */
4021 macsec->offload = MACSEC_OFFLOAD_OFF;
4023 /* Check if the offloading mode is supported by the underlying layers */
4024 if (macsec->offload != MACSEC_OFFLOAD_OFF &&
4025 !macsec_check_offload(macsec->offload, macsec))
4028 /* send_sci must be set to true when transmit sci explicitly is set */
4029 if ((data && data[IFLA_MACSEC_SCI]) &&
4030 (data && data[IFLA_MACSEC_INC_SCI])) {
4031 u8 send_sci = !!nla_get_u8(data[IFLA_MACSEC_INC_SCI]);
4037 if (data && data[IFLA_MACSEC_ICV_LEN])
4038 icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]);
4039 mtu = real_dev->mtu - icv_len - macsec_extra_len(true);
4045 rx_handler = rtnl_dereference(real_dev->rx_handler);
4046 if (rx_handler && rx_handler != macsec_handle_frame)
4049 err = register_netdevice(dev);
4053 netdev_lockdep_set_classes(dev);
4054 lockdep_set_class(&dev->addr_list_lock,
4055 &macsec_netdev_addr_lock_key);
4057 err = netdev_upper_dev_link(real_dev, dev, extack);
4061 /* need to be already registered so that ->init has run and
4062 * the MAC addr is set
4064 if (data && data[IFLA_MACSEC_SCI])
4065 sci = nla_get_sci(data[IFLA_MACSEC_SCI]);
4066 else if (data && data[IFLA_MACSEC_PORT])
4067 sci = dev_to_sci(dev, nla_get_be16(data[IFLA_MACSEC_PORT]));
4069 sci = dev_to_sci(dev, MACSEC_PORT_ES);
4071 if (rx_handler && sci_exists(real_dev, sci)) {
4076 err = macsec_add_dev(dev, sci, icv_len);
4081 err = macsec_changelink_common(dev, data);
4086 /* If h/w offloading is available, propagate to the device */
4087 if (macsec_is_offloaded(macsec)) {
4088 const struct macsec_ops *ops;
4089 struct macsec_context ctx;
4091 ops = macsec_get_ops(macsec, &ctx);
4093 ctx.secy = &macsec->secy;
4094 err = macsec_offload(ops->mdo_add_secy, &ctx);
4100 err = register_macsec_dev(real_dev, dev);
4104 netif_stacked_transfer_operstate(real_dev, dev);
4105 linkwatch_fire_event(dev);
4107 macsec_generation++;
4112 macsec_del_dev(macsec);
4114 netdev_upper_dev_unlink(real_dev, dev);
4116 unregister_netdevice(dev);
4120 static int macsec_validate_attr(struct nlattr *tb[], struct nlattr *data[],
4121 struct netlink_ext_ack *extack)
4123 u64 csid = MACSEC_DEFAULT_CIPHER_ID;
4124 u8 icv_len = DEFAULT_ICV_LEN;
4131 if (data[IFLA_MACSEC_CIPHER_SUITE])
4132 csid = nla_get_u64(data[IFLA_MACSEC_CIPHER_SUITE]);
4134 if (data[IFLA_MACSEC_ICV_LEN]) {
4135 icv_len = nla_get_u8(data[IFLA_MACSEC_ICV_LEN]);
4136 if (icv_len != DEFAULT_ICV_LEN) {
4137 char dummy_key[DEFAULT_SAK_LEN] = { 0 };
4138 struct crypto_aead *dummy_tfm;
4140 dummy_tfm = macsec_alloc_tfm(dummy_key,
4143 if (IS_ERR(dummy_tfm))
4144 return PTR_ERR(dummy_tfm);
4145 crypto_free_aead(dummy_tfm);
4150 case MACSEC_CIPHER_ID_GCM_AES_128:
4151 case MACSEC_CIPHER_ID_GCM_AES_256:
4152 case MACSEC_CIPHER_ID_GCM_AES_XPN_128:
4153 case MACSEC_CIPHER_ID_GCM_AES_XPN_256:
4154 case MACSEC_DEFAULT_CIPHER_ID:
4155 if (icv_len < MACSEC_MIN_ICV_LEN ||
4156 icv_len > MACSEC_STD_ICV_LEN)
4163 if (data[IFLA_MACSEC_ENCODING_SA]) {
4164 if (nla_get_u8(data[IFLA_MACSEC_ENCODING_SA]) >= MACSEC_NUM_AN)
4168 for (flag = IFLA_MACSEC_ENCODING_SA + 1;
4169 flag < IFLA_MACSEC_VALIDATION;
4172 if (nla_get_u8(data[flag]) > 1)
4177 es = data[IFLA_MACSEC_ES] ? nla_get_u8(data[IFLA_MACSEC_ES]) : false;
4178 sci = data[IFLA_MACSEC_INC_SCI] ? nla_get_u8(data[IFLA_MACSEC_INC_SCI]) : false;
4179 scb = data[IFLA_MACSEC_SCB] ? nla_get_u8(data[IFLA_MACSEC_SCB]) : false;
4181 if ((sci && (scb || es)) || (scb && es))
4184 if (data[IFLA_MACSEC_VALIDATION] &&
4185 nla_get_u8(data[IFLA_MACSEC_VALIDATION]) > MACSEC_VALIDATE_MAX)
4188 if ((data[IFLA_MACSEC_REPLAY_PROTECT] &&
4189 nla_get_u8(data[IFLA_MACSEC_REPLAY_PROTECT])) &&
4190 !data[IFLA_MACSEC_WINDOW])
4196 static struct net *macsec_get_link_net(const struct net_device *dev)
4198 return dev_net(macsec_priv(dev)->real_dev);
4201 static size_t macsec_get_size(const struct net_device *dev)
4203 return nla_total_size_64bit(8) + /* IFLA_MACSEC_SCI */
4204 nla_total_size(1) + /* IFLA_MACSEC_ICV_LEN */
4205 nla_total_size_64bit(8) + /* IFLA_MACSEC_CIPHER_SUITE */
4206 nla_total_size(4) + /* IFLA_MACSEC_WINDOW */
4207 nla_total_size(1) + /* IFLA_MACSEC_ENCODING_SA */
4208 nla_total_size(1) + /* IFLA_MACSEC_ENCRYPT */
4209 nla_total_size(1) + /* IFLA_MACSEC_PROTECT */
4210 nla_total_size(1) + /* IFLA_MACSEC_INC_SCI */
4211 nla_total_size(1) + /* IFLA_MACSEC_ES */
4212 nla_total_size(1) + /* IFLA_MACSEC_SCB */
4213 nla_total_size(1) + /* IFLA_MACSEC_REPLAY_PROTECT */
4214 nla_total_size(1) + /* IFLA_MACSEC_VALIDATION */
4218 static int macsec_fill_info(struct sk_buff *skb,
4219 const struct net_device *dev)
4221 struct macsec_secy *secy = &macsec_priv(dev)->secy;
4222 struct macsec_tx_sc *tx_sc = &secy->tx_sc;
4225 switch (secy->key_len) {
4226 case MACSEC_GCM_AES_128_SAK_LEN:
4227 csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_128 : MACSEC_DEFAULT_CIPHER_ID;
4229 case MACSEC_GCM_AES_256_SAK_LEN:
4230 csid = secy->xpn ? MACSEC_CIPHER_ID_GCM_AES_XPN_256 : MACSEC_CIPHER_ID_GCM_AES_256;
4233 goto nla_put_failure;
4236 if (nla_put_sci(skb, IFLA_MACSEC_SCI, secy->sci,
4238 nla_put_u8(skb, IFLA_MACSEC_ICV_LEN, secy->icv_len) ||
4239 nla_put_u64_64bit(skb, IFLA_MACSEC_CIPHER_SUITE,
4240 csid, IFLA_MACSEC_PAD) ||
4241 nla_put_u8(skb, IFLA_MACSEC_ENCODING_SA, tx_sc->encoding_sa) ||
4242 nla_put_u8(skb, IFLA_MACSEC_ENCRYPT, tx_sc->encrypt) ||
4243 nla_put_u8(skb, IFLA_MACSEC_PROTECT, secy->protect_frames) ||
4244 nla_put_u8(skb, IFLA_MACSEC_INC_SCI, tx_sc->send_sci) ||
4245 nla_put_u8(skb, IFLA_MACSEC_ES, tx_sc->end_station) ||
4246 nla_put_u8(skb, IFLA_MACSEC_SCB, tx_sc->scb) ||
4247 nla_put_u8(skb, IFLA_MACSEC_REPLAY_PROTECT, secy->replay_protect) ||
4248 nla_put_u8(skb, IFLA_MACSEC_VALIDATION, secy->validate_frames) ||
4250 goto nla_put_failure;
4252 if (secy->replay_protect) {
4253 if (nla_put_u32(skb, IFLA_MACSEC_WINDOW, secy->replay_window))
4254 goto nla_put_failure;
4263 static struct rtnl_link_ops macsec_link_ops __read_mostly = {
4265 .priv_size = sizeof(struct macsec_dev),
4266 .maxtype = IFLA_MACSEC_MAX,
4267 .policy = macsec_rtnl_policy,
4268 .setup = macsec_setup,
4269 .validate = macsec_validate_attr,
4270 .newlink = macsec_newlink,
4271 .changelink = macsec_changelink,
4272 .dellink = macsec_dellink,
4273 .get_size = macsec_get_size,
4274 .fill_info = macsec_fill_info,
4275 .get_link_net = macsec_get_link_net,
4278 static bool is_macsec_master(struct net_device *dev)
4280 return rcu_access_pointer(dev->rx_handler) == macsec_handle_frame;
4283 static int macsec_notify(struct notifier_block *this, unsigned long event,
4286 struct net_device *real_dev = netdev_notifier_info_to_dev(ptr);
4289 if (!is_macsec_master(real_dev))
4295 case NETDEV_CHANGE: {
4296 struct macsec_dev *m, *n;
4297 struct macsec_rxh_data *rxd;
4299 rxd = macsec_data_rtnl(real_dev);
4300 list_for_each_entry_safe(m, n, &rxd->secys, secys) {
4301 struct net_device *dev = m->secy.netdev;
4303 netif_stacked_transfer_operstate(real_dev, dev);
4307 case NETDEV_UNREGISTER: {
4308 struct macsec_dev *m, *n;
4309 struct macsec_rxh_data *rxd;
4311 rxd = macsec_data_rtnl(real_dev);
4312 list_for_each_entry_safe(m, n, &rxd->secys, secys) {
4313 macsec_common_dellink(m->secy.netdev, &head);
4316 netdev_rx_handler_unregister(real_dev);
4319 unregister_netdevice_many(&head);
4322 case NETDEV_CHANGEMTU: {
4323 struct macsec_dev *m;
4324 struct macsec_rxh_data *rxd;
4326 rxd = macsec_data_rtnl(real_dev);
4327 list_for_each_entry(m, &rxd->secys, secys) {
4328 struct net_device *dev = m->secy.netdev;
4329 unsigned int mtu = real_dev->mtu - (m->secy.icv_len +
4330 macsec_extra_len(true));
4333 dev_set_mtu(dev, mtu);
4341 static struct notifier_block macsec_notifier = {
4342 .notifier_call = macsec_notify,
4345 static int __init macsec_init(void)
4349 pr_info("MACsec IEEE 802.1AE\n");
4350 err = register_netdevice_notifier(&macsec_notifier);
4354 err = rtnl_link_register(&macsec_link_ops);
4358 err = genl_register_family(&macsec_fam);
4365 rtnl_link_unregister(&macsec_link_ops);
4367 unregister_netdevice_notifier(&macsec_notifier);
4371 static void __exit macsec_exit(void)
4373 genl_unregister_family(&macsec_fam);
4374 rtnl_link_unregister(&macsec_link_ops);
4375 unregister_netdevice_notifier(&macsec_notifier);
4379 module_init(macsec_init);
4380 module_exit(macsec_exit);
4382 MODULE_ALIAS_RTNL_LINK("macsec");
4383 MODULE_ALIAS_GENL_FAMILY("macsec");
4385 MODULE_DESCRIPTION("MACsec IEEE 802.1AE");
4386 MODULE_LICENSE("GPL v2");